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[J-linux.git] / drivers / net / wireless / intel / iwlegacy / 4965-mac.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /******************************************************************************
3  *
4  * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
5  *
6  * Portions of this file are derived from the ipw3945 project, as well
7  * as portions of the ieee80211 subsystem header files.
8  *
9  * Contact Information:
10  *  Intel Linux Wireless <[email protected]>
11  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
12  *
13  *****************************************************************************/
14
15 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
16
17 #include <linux/kernel.h>
18 #include <linux/module.h>
19 #include <linux/init.h>
20 #include <linux/pci.h>
21 #include <linux/slab.h>
22 #include <linux/dma-mapping.h>
23 #include <linux/delay.h>
24 #include <linux/sched.h>
25 #include <linux/skbuff.h>
26 #include <linux/netdevice.h>
27 #include <linux/firmware.h>
28 #include <linux/etherdevice.h>
29 #include <linux/if_arp.h>
30 #include <linux/units.h>
31
32 #include <net/mac80211.h>
33
34 #include <asm/div64.h>
35
36 #define DRV_NAME        "iwl4965"
37
38 #include "common.h"
39 #include "4965.h"
40
41 /******************************************************************************
42  *
43  * module boiler plate
44  *
45  ******************************************************************************/
46
47 /*
48  * module name, copyright, version, etc.
49  */
50 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi 4965 driver for Linux"
51
52 #ifdef CONFIG_IWLEGACY_DEBUG
53 #define VD "d"
54 #else
55 #define VD
56 #endif
57
58 #define DRV_VERSION     IWLWIFI_VERSION VD
59
60 MODULE_DESCRIPTION(DRV_DESCRIPTION);
61 MODULE_VERSION(DRV_VERSION);
62 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
63 MODULE_LICENSE("GPL");
64 MODULE_ALIAS("iwl4965");
65
66 void
67 il4965_check_abort_status(struct il_priv *il, u8 frame_count, u32 status)
68 {
69         if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
70                 IL_ERR("Tx flush command to flush out all frames\n");
71                 if (!test_bit(S_EXIT_PENDING, &il->status))
72                         queue_work(il->workqueue, &il->tx_flush);
73         }
74 }
75
76 /*
77  * EEPROM
78  */
79 struct il_mod_params il4965_mod_params = {
80         .restart_fw = 1,
81         /* the rest are 0 by default */
82 };
83
84 void
85 il4965_rx_queue_reset(struct il_priv *il, struct il_rx_queue *rxq)
86 {
87         unsigned long flags;
88         int i;
89         spin_lock_irqsave(&rxq->lock, flags);
90         INIT_LIST_HEAD(&rxq->rx_free);
91         INIT_LIST_HEAD(&rxq->rx_used);
92         /* Fill the rx_used queue with _all_ of the Rx buffers */
93         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
94                 /* In the reset function, these buffers may have been allocated
95                  * to an SKB, so we need to unmap and free potential storage */
96                 if (rxq->pool[i].page != NULL) {
97                         dma_unmap_page(&il->pci_dev->dev,
98                                        rxq->pool[i].page_dma,
99                                        PAGE_SIZE << il->hw_params.rx_page_order,
100                                        DMA_FROM_DEVICE);
101                         __il_free_pages(il, rxq->pool[i].page);
102                         rxq->pool[i].page = NULL;
103                 }
104                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
105         }
106
107         for (i = 0; i < RX_QUEUE_SIZE; i++)
108                 rxq->queue[i] = NULL;
109
110         /* Set us so that we have processed and used all buffers, but have
111          * not restocked the Rx queue with fresh buffers */
112         rxq->read = rxq->write = 0;
113         rxq->write_actual = 0;
114         rxq->free_count = 0;
115         spin_unlock_irqrestore(&rxq->lock, flags);
116 }
117
118 int
119 il4965_rx_init(struct il_priv *il, struct il_rx_queue *rxq)
120 {
121         u32 rb_size;
122         const u32 rfdnlog = RX_QUEUE_SIZE_LOG;  /* 256 RBDs */
123         u32 rb_timeout = 0;
124
125         if (il->cfg->mod_params->amsdu_size_8K)
126                 rb_size = FH49_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K;
127         else
128                 rb_size = FH49_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K;
129
130         /* Stop Rx DMA */
131         il_wr(il, FH49_MEM_RCSR_CHNL0_CONFIG_REG, 0);
132
133         /* Reset driver's Rx queue write idx */
134         il_wr(il, FH49_RSCSR_CHNL0_RBDCB_WPTR_REG, 0);
135
136         /* Tell device where to find RBD circular buffer in DRAM */
137         il_wr(il, FH49_RSCSR_CHNL0_RBDCB_BASE_REG, (u32) (rxq->bd_dma >> 8));
138
139         /* Tell device where in DRAM to update its Rx status */
140         il_wr(il, FH49_RSCSR_CHNL0_STTS_WPTR_REG, rxq->rb_stts_dma >> 4);
141
142         /* Enable Rx DMA
143          * Direct rx interrupts to hosts
144          * Rx buffer size 4 or 8k
145          * RB timeout 0x10
146          * 256 RBDs
147          */
148         il_wr(il, FH49_MEM_RCSR_CHNL0_CONFIG_REG,
149               FH49_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL |
150               FH49_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL |
151               FH49_RCSR_CHNL0_RX_CONFIG_SINGLE_FRAME_MSK |
152               rb_size |
153               (rb_timeout << FH49_RCSR_RX_CONFIG_REG_IRQ_RBTH_POS) |
154               (rfdnlog << FH49_RCSR_RX_CONFIG_RBDCB_SIZE_POS));
155
156         /* Set interrupt coalescing timer to default (2048 usecs) */
157         il_write8(il, CSR_INT_COALESCING, IL_HOST_INT_TIMEOUT_DEF);
158
159         return 0;
160 }
161
162 static void
163 il4965_set_pwr_vmain(struct il_priv *il)
164 {
165 /*
166  * (for documentation purposes)
167  * to set power to V_AUX, do:
168
169                 if (pci_pme_capable(il->pci_dev, PCI_D3cold))
170                         il_set_bits_mask_prph(il, APMG_PS_CTRL_REG,
171                                                APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
172                                                ~APMG_PS_CTRL_MSK_PWR_SRC);
173  */
174
175         il_set_bits_mask_prph(il, APMG_PS_CTRL_REG,
176                               APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
177                               ~APMG_PS_CTRL_MSK_PWR_SRC);
178 }
179
180 int
181 il4965_hw_nic_init(struct il_priv *il)
182 {
183         unsigned long flags;
184         struct il_rx_queue *rxq = &il->rxq;
185         int ret;
186
187         spin_lock_irqsave(&il->lock, flags);
188         il_apm_init(il);
189         /* Set interrupt coalescing calibration timer to default (512 usecs) */
190         il_write8(il, CSR_INT_COALESCING, IL_HOST_INT_CALIB_TIMEOUT_DEF);
191         spin_unlock_irqrestore(&il->lock, flags);
192
193         il4965_set_pwr_vmain(il);
194         il4965_nic_config(il);
195
196         /* Allocate the RX queue, or reset if it is already allocated */
197         if (!rxq->bd) {
198                 ret = il_rx_queue_alloc(il);
199                 if (ret) {
200                         IL_ERR("Unable to initialize Rx queue\n");
201                         return -ENOMEM;
202                 }
203         } else
204                 il4965_rx_queue_reset(il, rxq);
205
206         il4965_rx_replenish(il);
207
208         il4965_rx_init(il, rxq);
209
210         spin_lock_irqsave(&il->lock, flags);
211
212         rxq->need_update = 1;
213         il_rx_queue_update_write_ptr(il, rxq);
214
215         spin_unlock_irqrestore(&il->lock, flags);
216
217         /* Allocate or reset and init all Tx and Command queues */
218         if (!il->txq) {
219                 ret = il4965_txq_ctx_alloc(il);
220                 if (ret)
221                         return ret;
222         } else
223                 il4965_txq_ctx_reset(il);
224
225         set_bit(S_INIT, &il->status);
226
227         return 0;
228 }
229
230 /*
231  * il4965_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
232  */
233 static inline __le32
234 il4965_dma_addr2rbd_ptr(struct il_priv *il, dma_addr_t dma_addr)
235 {
236         return cpu_to_le32((u32) (dma_addr >> 8));
237 }
238
239 /*
240  * il4965_rx_queue_restock - refill RX queue from pre-allocated pool
241  *
242  * If there are slots in the RX queue that need to be restocked,
243  * and we have free pre-allocated buffers, fill the ranks as much
244  * as we can, pulling from rx_free.
245  *
246  * This moves the 'write' idx forward to catch up with 'processed', and
247  * also updates the memory address in the firmware to reference the new
248  * target buffer.
249  */
250 void
251 il4965_rx_queue_restock(struct il_priv *il)
252 {
253         struct il_rx_queue *rxq = &il->rxq;
254         struct list_head *element;
255         struct il_rx_buf *rxb;
256         unsigned long flags;
257
258         spin_lock_irqsave(&rxq->lock, flags);
259         while (il_rx_queue_space(rxq) > 0 && rxq->free_count) {
260                 /* The overwritten rxb must be a used one */
261                 rxb = rxq->queue[rxq->write];
262                 BUG_ON(rxb && rxb->page);
263
264                 /* Get next free Rx buffer, remove from free list */
265                 element = rxq->rx_free.next;
266                 rxb = list_entry(element, struct il_rx_buf, list);
267                 list_del(element);
268
269                 /* Point to Rx buffer via next RBD in circular buffer */
270                 rxq->bd[rxq->write] =
271                     il4965_dma_addr2rbd_ptr(il, rxb->page_dma);
272                 rxq->queue[rxq->write] = rxb;
273                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
274                 rxq->free_count--;
275         }
276         spin_unlock_irqrestore(&rxq->lock, flags);
277         /* If the pre-allocated buffer pool is dropping low, schedule to
278          * refill it */
279         if (rxq->free_count <= RX_LOW_WATERMARK)
280                 queue_work(il->workqueue, &il->rx_replenish);
281
282         /* If we've added more space for the firmware to place data, tell it.
283          * Increment device's write pointer in multiples of 8. */
284         if (rxq->write_actual != (rxq->write & ~0x7)) {
285                 spin_lock_irqsave(&rxq->lock, flags);
286                 rxq->need_update = 1;
287                 spin_unlock_irqrestore(&rxq->lock, flags);
288                 il_rx_queue_update_write_ptr(il, rxq);
289         }
290 }
291
292 /*
293  * il4965_rx_replenish - Move all used packet from rx_used to rx_free
294  *
295  * When moving to rx_free an SKB is allocated for the slot.
296  *
297  * Also restock the Rx queue via il_rx_queue_restock.
298  * This is called as a scheduled work item (except for during initialization)
299  */
300 static void
301 il4965_rx_allocate(struct il_priv *il, gfp_t priority)
302 {
303         struct il_rx_queue *rxq = &il->rxq;
304         struct list_head *element;
305         struct il_rx_buf *rxb;
306         struct page *page;
307         dma_addr_t page_dma;
308         unsigned long flags;
309         gfp_t gfp_mask = priority;
310
311         while (1) {
312                 spin_lock_irqsave(&rxq->lock, flags);
313                 if (list_empty(&rxq->rx_used)) {
314                         spin_unlock_irqrestore(&rxq->lock, flags);
315                         return;
316                 }
317                 spin_unlock_irqrestore(&rxq->lock, flags);
318
319                 if (rxq->free_count > RX_LOW_WATERMARK)
320                         gfp_mask |= __GFP_NOWARN;
321
322                 if (il->hw_params.rx_page_order > 0)
323                         gfp_mask |= __GFP_COMP;
324
325                 /* Alloc a new receive buffer */
326                 page = alloc_pages(gfp_mask, il->hw_params.rx_page_order);
327                 if (!page) {
328                         if (net_ratelimit())
329                                 D_INFO("alloc_pages failed, " "order: %d\n",
330                                        il->hw_params.rx_page_order);
331
332                         if (rxq->free_count <= RX_LOW_WATERMARK &&
333                             net_ratelimit())
334                                 IL_ERR("Failed to alloc_pages with %s. "
335                                        "Only %u free buffers remaining.\n",
336                                        priority ==
337                                        GFP_ATOMIC ? "GFP_ATOMIC" : "GFP_KERNEL",
338                                        rxq->free_count);
339                         /* We don't reschedule replenish work here -- we will
340                          * call the restock method and if it still needs
341                          * more buffers it will schedule replenish */
342                         return;
343                 }
344
345                 /* Get physical address of the RB */
346                 page_dma = dma_map_page(&il->pci_dev->dev, page, 0,
347                                         PAGE_SIZE << il->hw_params.rx_page_order,
348                                         DMA_FROM_DEVICE);
349                 if (unlikely(dma_mapping_error(&il->pci_dev->dev, page_dma))) {
350                         __free_pages(page, il->hw_params.rx_page_order);
351                         break;
352                 }
353
354                 spin_lock_irqsave(&rxq->lock, flags);
355
356                 if (list_empty(&rxq->rx_used)) {
357                         spin_unlock_irqrestore(&rxq->lock, flags);
358                         dma_unmap_page(&il->pci_dev->dev, page_dma,
359                                        PAGE_SIZE << il->hw_params.rx_page_order,
360                                        DMA_FROM_DEVICE);
361                         __free_pages(page, il->hw_params.rx_page_order);
362                         return;
363                 }
364
365                 element = rxq->rx_used.next;
366                 rxb = list_entry(element, struct il_rx_buf, list);
367                 list_del(element);
368
369                 BUG_ON(rxb->page);
370
371                 rxb->page = page;
372                 rxb->page_dma = page_dma;
373                 list_add_tail(&rxb->list, &rxq->rx_free);
374                 rxq->free_count++;
375                 il->alloc_rxb_page++;
376
377                 spin_unlock_irqrestore(&rxq->lock, flags);
378         }
379 }
380
381 void
382 il4965_rx_replenish(struct il_priv *il)
383 {
384         unsigned long flags;
385
386         il4965_rx_allocate(il, GFP_KERNEL);
387
388         spin_lock_irqsave(&il->lock, flags);
389         il4965_rx_queue_restock(il);
390         spin_unlock_irqrestore(&il->lock, flags);
391 }
392
393 void
394 il4965_rx_replenish_now(struct il_priv *il)
395 {
396         il4965_rx_allocate(il, GFP_ATOMIC);
397
398         il4965_rx_queue_restock(il);
399 }
400
401 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
402  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
403  * This free routine walks the list of POOL entries and if SKB is set to
404  * non NULL it is unmapped and freed
405  */
406 void
407 il4965_rx_queue_free(struct il_priv *il, struct il_rx_queue *rxq)
408 {
409         int i;
410         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
411                 if (rxq->pool[i].page != NULL) {
412                         dma_unmap_page(&il->pci_dev->dev,
413                                        rxq->pool[i].page_dma,
414                                        PAGE_SIZE << il->hw_params.rx_page_order,
415                                        DMA_FROM_DEVICE);
416                         __il_free_pages(il, rxq->pool[i].page);
417                         rxq->pool[i].page = NULL;
418                 }
419         }
420
421         dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
422                           rxq->bd_dma);
423         dma_free_coherent(&il->pci_dev->dev, sizeof(struct il_rb_status),
424                           rxq->rb_stts, rxq->rb_stts_dma);
425         rxq->bd = NULL;
426         rxq->rb_stts = NULL;
427 }
428
429 int
430 il4965_rxq_stop(struct il_priv *il)
431 {
432         int ret;
433
434         _il_wr(il, FH49_MEM_RCSR_CHNL0_CONFIG_REG, 0);
435         ret = _il_poll_bit(il, FH49_MEM_RSSR_RX_STATUS_REG,
436                            FH49_RSSR_CHNL0_RX_STATUS_CHNL_IDLE,
437                            FH49_RSSR_CHNL0_RX_STATUS_CHNL_IDLE,
438                            1000);
439         if (ret < 0)
440                 IL_ERR("Can't stop Rx DMA.\n");
441
442         return 0;
443 }
444
445 int
446 il4965_hwrate_to_mac80211_idx(u32 rate_n_flags, enum nl80211_band band)
447 {
448         int idx = 0;
449         int band_offset = 0;
450
451         /* HT rate format: mac80211 wants an MCS number, which is just LSB */
452         if (rate_n_flags & RATE_MCS_HT_MSK) {
453                 idx = (rate_n_flags & 0xff);
454                 return idx;
455                 /* Legacy rate format, search for match in table */
456         } else {
457                 if (band == NL80211_BAND_5GHZ)
458                         band_offset = IL_FIRST_OFDM_RATE;
459                 for (idx = band_offset; idx < RATE_COUNT_LEGACY; idx++)
460                         if (il_rates[idx].plcp == (rate_n_flags & 0xFF))
461                                 return idx - band_offset;
462         }
463
464         return -1;
465 }
466
467 static int
468 il4965_calc_rssi(struct il_priv *il, struct il_rx_phy_res *rx_resp)
469 {
470         /* data from PHY/DSP regarding signal strength, etc.,
471          *   contents are always there, not configurable by host.  */
472         struct il4965_rx_non_cfg_phy *ncphy =
473             (struct il4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy_buf;
474         u32 agc =
475             (le16_to_cpu(ncphy->agc_info) & IL49_AGC_DB_MASK) >>
476             IL49_AGC_DB_POS;
477
478         u32 valid_antennae =
479             (le16_to_cpu(rx_resp->phy_flags) & IL49_RX_PHY_FLAGS_ANTENNAE_MASK)
480             >> IL49_RX_PHY_FLAGS_ANTENNAE_OFFSET;
481         u8 max_rssi = 0;
482         u32 i;
483
484         /* Find max rssi among 3 possible receivers.
485          * These values are measured by the digital signal processor (DSP).
486          * They should stay fairly constant even as the signal strength varies,
487          *   if the radio's automatic gain control (AGC) is working right.
488          * AGC value (see below) will provide the "interesting" info. */
489         for (i = 0; i < 3; i++)
490                 if (valid_antennae & (1 << i))
491                         max_rssi = max(ncphy->rssi_info[i << 1], max_rssi);
492
493         D_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n",
494                 ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4],
495                 max_rssi, agc);
496
497         /* dBm = max_rssi dB - agc dB - constant.
498          * Higher AGC (higher radio gain) means lower signal. */
499         return max_rssi - agc - IL4965_RSSI_OFFSET;
500 }
501
502 static u32
503 il4965_translate_rx_status(struct il_priv *il, u32 decrypt_in)
504 {
505         u32 decrypt_out = 0;
506
507         if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) ==
508             RX_RES_STATUS_STATION_FOUND)
509                 decrypt_out |=
510                     (RX_RES_STATUS_STATION_FOUND |
511                      RX_RES_STATUS_NO_STATION_INFO_MISMATCH);
512
513         decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK);
514
515         /* packet was not encrypted */
516         if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
517             RX_RES_STATUS_SEC_TYPE_NONE)
518                 return decrypt_out;
519
520         /* packet was encrypted with unknown alg */
521         if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
522             RX_RES_STATUS_SEC_TYPE_ERR)
523                 return decrypt_out;
524
525         /* decryption was not done in HW */
526         if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) !=
527             RX_MPDU_RES_STATUS_DEC_DONE_MSK)
528                 return decrypt_out;
529
530         switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) {
531
532         case RX_RES_STATUS_SEC_TYPE_CCMP:
533                 /* alg is CCM: check MIC only */
534                 if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK))
535                         /* Bad MIC */
536                         decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
537                 else
538                         decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
539
540                 break;
541
542         case RX_RES_STATUS_SEC_TYPE_TKIP:
543                 if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) {
544                         /* Bad TTAK */
545                         decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK;
546                         break;
547                 }
548                 fallthrough;    /* if TTAK OK */
549         default:
550                 if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK))
551                         decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
552                 else
553                         decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
554                 break;
555         }
556
557         D_RX("decrypt_in:0x%x  decrypt_out = 0x%x\n", decrypt_in, decrypt_out);
558
559         return decrypt_out;
560 }
561
562 #define SMALL_PACKET_SIZE 256
563
564 static void
565 il4965_pass_packet_to_mac80211(struct il_priv *il, struct ieee80211_hdr *hdr,
566                                u32 len, u32 ampdu_status, struct il_rx_buf *rxb,
567                                struct ieee80211_rx_status *stats)
568 {
569         struct sk_buff *skb;
570         __le16 fc = hdr->frame_control;
571
572         /* We only process data packets if the interface is open */
573         if (unlikely(!il->is_open)) {
574                 D_DROP("Dropping packet while interface is not open.\n");
575                 return;
576         }
577
578         if (unlikely(test_bit(IL_STOP_REASON_PASSIVE, &il->stop_reason))) {
579                 il_wake_queues_by_reason(il, IL_STOP_REASON_PASSIVE);
580                 D_INFO("Woke queues - frame received on passive channel\n");
581         }
582
583         /* In case of HW accelerated crypto and bad decryption, drop */
584         if (!il->cfg->mod_params->sw_crypto &&
585             il_set_decrypted_flag(il, hdr, ampdu_status, stats))
586                 return;
587
588         skb = dev_alloc_skb(SMALL_PACKET_SIZE);
589         if (!skb) {
590                 IL_ERR("dev_alloc_skb failed\n");
591                 return;
592         }
593
594         if (len <= SMALL_PACKET_SIZE) {
595                 skb_put_data(skb, hdr, len);
596         } else {
597                 skb_add_rx_frag(skb, 0, rxb->page, (void *)hdr - rxb_addr(rxb),
598                                 len, PAGE_SIZE << il->hw_params.rx_page_order);
599                 il->alloc_rxb_page--;
600                 rxb->page = NULL;
601         }
602
603         il_update_stats(il, false, fc, len);
604         memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));
605
606         ieee80211_rx(il->hw, skb);
607 }
608
609 /* Called for N_RX (legacy ABG frames), or
610  * N_RX_MPDU (HT high-throughput N frames). */
611 static void
612 il4965_hdl_rx(struct il_priv *il, struct il_rx_buf *rxb)
613 {
614         struct ieee80211_hdr *header;
615         struct ieee80211_rx_status rx_status = {};
616         struct il_rx_pkt *pkt = rxb_addr(rxb);
617         struct il_rx_phy_res *phy_res;
618         __le32 rx_pkt_status;
619         struct il_rx_mpdu_res_start *amsdu;
620         u32 len;
621         u32 ampdu_status;
622         u32 rate_n_flags;
623
624         /**
625          * N_RX and N_RX_MPDU are handled differently.
626          *      N_RX: physical layer info is in this buffer
627          *      N_RX_MPDU: physical layer info was sent in separate
628          *              command and cached in il->last_phy_res
629          *
630          * Here we set up local variables depending on which command is
631          * received.
632          */
633         if (pkt->hdr.cmd == N_RX) {
634                 phy_res = (struct il_rx_phy_res *)pkt->u.raw;
635                 header =
636                     (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*phy_res) +
637                                              phy_res->cfg_phy_cnt);
638
639                 len = le16_to_cpu(phy_res->byte_count);
640                 rx_pkt_status =
641                     *(__le32 *) (pkt->u.raw + sizeof(*phy_res) +
642                                  phy_res->cfg_phy_cnt + len);
643                 ampdu_status = le32_to_cpu(rx_pkt_status);
644         } else {
645                 if (!il->_4965.last_phy_res_valid) {
646                         IL_ERR("MPDU frame without cached PHY data\n");
647                         return;
648                 }
649                 phy_res = &il->_4965.last_phy_res;
650                 amsdu = (struct il_rx_mpdu_res_start *)pkt->u.raw;
651                 header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*amsdu));
652                 len = le16_to_cpu(amsdu->byte_count);
653                 rx_pkt_status = *(__le32 *) (pkt->u.raw + sizeof(*amsdu) + len);
654                 ampdu_status =
655                     il4965_translate_rx_status(il, le32_to_cpu(rx_pkt_status));
656         }
657
658         if ((unlikely(phy_res->cfg_phy_cnt > 20))) {
659                 D_DROP("dsp size out of range [0,20]: %d\n",
660                        phy_res->cfg_phy_cnt);
661                 return;
662         }
663
664         if (!(rx_pkt_status & RX_RES_STATUS_NO_CRC32_ERROR) ||
665             !(rx_pkt_status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
666                 D_RX("Bad CRC or FIFO: 0x%08X.\n", le32_to_cpu(rx_pkt_status));
667                 return;
668         }
669
670         /* This will be used in several places later */
671         rate_n_flags = le32_to_cpu(phy_res->rate_n_flags);
672
673         /* rx_status carries information about the packet to mac80211 */
674         rx_status.mactime = le64_to_cpu(phy_res->timestamp);
675         rx_status.band =
676             (phy_res->
677              phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ? NL80211_BAND_2GHZ :
678             NL80211_BAND_5GHZ;
679         rx_status.freq =
680             ieee80211_channel_to_frequency(le16_to_cpu(phy_res->channel),
681                                            rx_status.band);
682         rx_status.rate_idx =
683             il4965_hwrate_to_mac80211_idx(rate_n_flags, rx_status.band);
684         rx_status.flag = 0;
685
686         /* TSF isn't reliable. In order to allow smooth user experience,
687          * this W/A doesn't propagate it to the mac80211 */
688         /*rx_status.flag |= RX_FLAG_MACTIME_START; */
689
690         il->ucode_beacon_time = le32_to_cpu(phy_res->beacon_time_stamp);
691
692         /* Find max signal strength (dBm) among 3 antenna/receiver chains */
693         rx_status.signal = il4965_calc_rssi(il, phy_res);
694
695         D_STATS("Rssi %d, TSF %llu\n", rx_status.signal,
696                 (unsigned long long)rx_status.mactime);
697
698         /*
699          * "antenna number"
700          *
701          * It seems that the antenna field in the phy flags value
702          * is actually a bit field. This is undefined by radiotap,
703          * it wants an actual antenna number but I always get "7"
704          * for most legacy frames I receive indicating that the
705          * same frame was received on all three RX chains.
706          *
707          * I think this field should be removed in favor of a
708          * new 802.11n radiotap field "RX chains" that is defined
709          * as a bitmask.
710          */
711         rx_status.antenna =
712             (le16_to_cpu(phy_res->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA_MSK) >>
713             RX_RES_PHY_FLAGS_ANTENNA_POS;
714
715         /* set the preamble flag if appropriate */
716         if (phy_res->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
717                 rx_status.enc_flags |= RX_ENC_FLAG_SHORTPRE;
718
719         /* Set up the HT phy flags */
720         if (rate_n_flags & RATE_MCS_HT_MSK)
721                 rx_status.encoding = RX_ENC_HT;
722         if (rate_n_flags & RATE_MCS_HT40_MSK)
723                 rx_status.bw = RATE_INFO_BW_40;
724         else
725                 rx_status.bw = RATE_INFO_BW_20;
726         if (rate_n_flags & RATE_MCS_SGI_MSK)
727                 rx_status.enc_flags |= RX_ENC_FLAG_SHORT_GI;
728
729         if (phy_res->phy_flags & RX_RES_PHY_FLAGS_AGG_MSK) {
730                 /* We know which subframes of an A-MPDU belong
731                  * together since we get a single PHY response
732                  * from the firmware for all of them.
733                  */
734
735                 rx_status.flag |= RX_FLAG_AMPDU_DETAILS;
736                 rx_status.ampdu_reference = il->_4965.ampdu_ref;
737         }
738
739         il4965_pass_packet_to_mac80211(il, header, len, ampdu_status, rxb,
740                                        &rx_status);
741 }
742
743 /* Cache phy data (Rx signal strength, etc) for HT frame (N_RX_PHY).
744  * This will be used later in il_hdl_rx() for N_RX_MPDU. */
745 static void
746 il4965_hdl_rx_phy(struct il_priv *il, struct il_rx_buf *rxb)
747 {
748         struct il_rx_pkt *pkt = rxb_addr(rxb);
749         il->_4965.last_phy_res_valid = true;
750         il->_4965.ampdu_ref++;
751         memcpy(&il->_4965.last_phy_res, pkt->u.raw,
752                sizeof(struct il_rx_phy_res));
753 }
754
755 static int
756 il4965_get_channels_for_scan(struct il_priv *il, struct ieee80211_vif *vif,
757                              enum nl80211_band band, u8 is_active,
758                              u8 n_probes, struct il_scan_channel *scan_ch)
759 {
760         struct ieee80211_channel *chan;
761         const struct ieee80211_supported_band *sband;
762         const struct il_channel_info *ch_info;
763         u16 passive_dwell = 0;
764         u16 active_dwell = 0;
765         int added, i;
766         u16 channel;
767
768         sband = il_get_hw_mode(il, band);
769         if (!sband)
770                 return 0;
771
772         active_dwell = il_get_active_dwell_time(il, band, n_probes);
773         passive_dwell = il_get_passive_dwell_time(il, band, vif);
774
775         if (passive_dwell <= active_dwell)
776                 passive_dwell = active_dwell + 1;
777
778         for (i = 0, added = 0; i < il->scan_request->n_channels; i++) {
779                 chan = il->scan_request->channels[i];
780
781                 if (chan->band != band)
782                         continue;
783
784                 channel = chan->hw_value;
785                 scan_ch->channel = cpu_to_le16(channel);
786
787                 ch_info = il_get_channel_info(il, band, channel);
788                 if (!il_is_channel_valid(ch_info)) {
789                         D_SCAN("Channel %d is INVALID for this band.\n",
790                                channel);
791                         continue;
792                 }
793
794                 if (!is_active || il_is_channel_passive(ch_info) ||
795                     (chan->flags & IEEE80211_CHAN_NO_IR))
796                         scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
797                 else
798                         scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE;
799
800                 if (n_probes)
801                         scan_ch->type |= IL_SCAN_PROBE_MASK(n_probes);
802
803                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
804                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
805
806                 /* Set txpower levels to defaults */
807                 scan_ch->dsp_atten = 110;
808
809                 /* NOTE: if we were doing 6Mb OFDM for scans we'd use
810                  * power level:
811                  * scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3;
812                  */
813                 if (band == NL80211_BAND_5GHZ)
814                         scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
815                 else
816                         scan_ch->tx_gain = ((1 << 5) | (5 << 3));
817
818                 D_SCAN("Scanning ch=%d prob=0x%X [%s %d]\n", channel,
819                        le32_to_cpu(scan_ch->type),
820                        (scan_ch->
821                         type & SCAN_CHANNEL_TYPE_ACTIVE) ? "ACTIVE" : "PASSIVE",
822                        (scan_ch->
823                         type & SCAN_CHANNEL_TYPE_ACTIVE) ? active_dwell :
824                        passive_dwell);
825
826                 scan_ch++;
827                 added++;
828         }
829
830         D_SCAN("total channels to scan %d\n", added);
831         return added;
832 }
833
834 static void
835 il4965_toggle_tx_ant(struct il_priv *il, u8 *ant, u8 valid)
836 {
837         int i;
838         u8 ind = *ant;
839
840         for (i = 0; i < RATE_ANT_NUM - 1; i++) {
841                 ind = (ind + 1) < RATE_ANT_NUM ? ind + 1 : 0;
842                 if (valid & BIT(ind)) {
843                         *ant = ind;
844                         return;
845                 }
846         }
847 }
848
849 int
850 il4965_request_scan(struct il_priv *il, struct ieee80211_vif *vif)
851 {
852         struct il_host_cmd cmd = {
853                 .id = C_SCAN,
854                 .len = sizeof(struct il_scan_cmd),
855                 .flags = CMD_SIZE_HUGE,
856         };
857         struct il_scan_cmd *scan;
858         u32 rate_flags = 0;
859         u16 cmd_len;
860         u16 rx_chain = 0;
861         enum nl80211_band band;
862         u8 n_probes = 0;
863         u8 rx_ant = il->hw_params.valid_rx_ant;
864         u8 rate;
865         bool is_active = false;
866         int chan_mod;
867         u8 active_chains;
868         u8 scan_tx_antennas = il->hw_params.valid_tx_ant;
869         int ret;
870
871         lockdep_assert_held(&il->mutex);
872
873         if (!il->scan_cmd) {
874                 il->scan_cmd =
875                     kmalloc(sizeof(struct il_scan_cmd) + IL_MAX_SCAN_SIZE,
876                             GFP_KERNEL);
877                 if (!il->scan_cmd) {
878                         D_SCAN("fail to allocate memory for scan\n");
879                         return -ENOMEM;
880                 }
881         }
882         scan = il->scan_cmd;
883         memset(scan, 0, sizeof(struct il_scan_cmd) + IL_MAX_SCAN_SIZE);
884
885         scan->quiet_plcp_th = IL_PLCP_QUIET_THRESH;
886         scan->quiet_time = IL_ACTIVE_QUIET_TIME;
887
888         if (il_is_any_associated(il)) {
889                 u16 interval;
890                 u32 extra;
891                 u32 suspend_time = 100;
892                 u32 scan_suspend_time = 100;
893
894                 D_INFO("Scanning while associated...\n");
895                 interval = vif->bss_conf.beacon_int;
896
897                 scan->suspend_time = 0;
898                 scan->max_out_time = cpu_to_le32(200 * 1024);
899                 if (!interval)
900                         interval = suspend_time;
901
902                 extra = (suspend_time / interval) << 22;
903                 scan_suspend_time =
904                     (extra | ((suspend_time % interval) * 1024));
905                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
906                 D_SCAN("suspend_time 0x%X beacon interval %d\n",
907                        scan_suspend_time, interval);
908         }
909
910         if (il->scan_request->n_ssids) {
911                 int i, p = 0;
912                 D_SCAN("Kicking off active scan\n");
913                 for (i = 0; i < il->scan_request->n_ssids; i++) {
914                         /* always does wildcard anyway */
915                         if (!il->scan_request->ssids[i].ssid_len)
916                                 continue;
917                         scan->direct_scan[p].id = WLAN_EID_SSID;
918                         scan->direct_scan[p].len =
919                             il->scan_request->ssids[i].ssid_len;
920                         memcpy(scan->direct_scan[p].ssid,
921                                il->scan_request->ssids[i].ssid,
922                                il->scan_request->ssids[i].ssid_len);
923                         n_probes++;
924                         p++;
925                 }
926                 is_active = true;
927         } else
928                 D_SCAN("Start passive scan.\n");
929
930         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
931         scan->tx_cmd.sta_id = il->hw_params.bcast_id;
932         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
933
934         switch (il->scan_band) {
935         case NL80211_BAND_2GHZ:
936                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
937                 chan_mod =
938                     le32_to_cpu(il->active.flags & RXON_FLG_CHANNEL_MODE_MSK) >>
939                     RXON_FLG_CHANNEL_MODE_POS;
940                 if (chan_mod == CHANNEL_MODE_PURE_40) {
941                         rate = RATE_6M_PLCP;
942                 } else {
943                         rate = RATE_1M_PLCP;
944                         rate_flags = RATE_MCS_CCK_MSK;
945                 }
946                 break;
947         case NL80211_BAND_5GHZ:
948                 rate = RATE_6M_PLCP;
949                 break;
950         default:
951                 IL_WARN("Invalid scan band\n");
952                 return -EIO;
953         }
954
955         /*
956          * If active scanning is requested but a certain channel is
957          * marked passive, we can do active scanning if we detect
958          * transmissions.
959          *
960          * There is an issue with some firmware versions that triggers
961          * a sysassert on a "good CRC threshold" of zero (== disabled),
962          * on a radar channel even though this means that we should NOT
963          * send probes.
964          *
965          * The "good CRC threshold" is the number of frames that we
966          * need to receive during our dwell time on a channel before
967          * sending out probes -- setting this to a huge value will
968          * mean we never reach it, but at the same time work around
969          * the aforementioned issue. Thus use IL_GOOD_CRC_TH_NEVER
970          * here instead of IL_GOOD_CRC_TH_DISABLED.
971          */
972         scan->good_CRC_th =
973             is_active ? IL_GOOD_CRC_TH_DEFAULT : IL_GOOD_CRC_TH_NEVER;
974
975         band = il->scan_band;
976
977         if (il->cfg->scan_rx_antennas[band])
978                 rx_ant = il->cfg->scan_rx_antennas[band];
979
980         il4965_toggle_tx_ant(il, &il->scan_tx_ant[band], scan_tx_antennas);
981         rate_flags |= BIT(il->scan_tx_ant[band]) << RATE_MCS_ANT_POS;
982         scan->tx_cmd.rate_n_flags = cpu_to_le32(rate | rate_flags);
983
984         /* In power save mode use one chain, otherwise use all chains */
985         if (test_bit(S_POWER_PMI, &il->status)) {
986                 /* rx_ant has been set to all valid chains previously */
987                 active_chains =
988                     rx_ant & ((u8) (il->chain_noise_data.active_chains));
989                 if (!active_chains)
990                         active_chains = rx_ant;
991
992                 D_SCAN("chain_noise_data.active_chains: %u\n",
993                        il->chain_noise_data.active_chains);
994
995                 rx_ant = il4965_first_antenna(active_chains);
996         }
997
998         /* MIMO is not used here, but value is required */
999         rx_chain |= il->hw_params.valid_rx_ant << RXON_RX_CHAIN_VALID_POS;
1000         rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
1001         rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_SEL_POS;
1002         rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
1003         scan->rx_chain = cpu_to_le16(rx_chain);
1004
1005         cmd_len =
1006             il_fill_probe_req(il, (struct ieee80211_mgmt *)scan->data,
1007                               vif->addr, il->scan_request->ie,
1008                               il->scan_request->ie_len,
1009                               IL_MAX_SCAN_SIZE - sizeof(*scan));
1010         scan->tx_cmd.len = cpu_to_le16(cmd_len);
1011
1012         scan->filter_flags |=
1013             (RXON_FILTER_ACCEPT_GRP_MSK | RXON_FILTER_BCON_AWARE_MSK);
1014
1015         scan->channel_count =
1016             il4965_get_channels_for_scan(il, vif, band, is_active, n_probes,
1017                                          (void *)&scan->data[cmd_len]);
1018         if (scan->channel_count == 0) {
1019                 D_SCAN("channel count %d\n", scan->channel_count);
1020                 return -EIO;
1021         }
1022
1023         cmd.len +=
1024             le16_to_cpu(scan->tx_cmd.len) +
1025             scan->channel_count * sizeof(struct il_scan_channel);
1026         cmd.data = scan;
1027         scan->len = cpu_to_le16(cmd.len);
1028
1029         set_bit(S_SCAN_HW, &il->status);
1030
1031         ret = il_send_cmd_sync(il, &cmd);
1032         if (ret)
1033                 clear_bit(S_SCAN_HW, &il->status);
1034
1035         return ret;
1036 }
1037
1038 int
1039 il4965_manage_ibss_station(struct il_priv *il, struct ieee80211_vif *vif,
1040                            bool add)
1041 {
1042         struct il_vif_priv *vif_priv = (void *)vif->drv_priv;
1043
1044         if (add)
1045                 return il4965_add_bssid_station(il, vif->bss_conf.bssid,
1046                                                 &vif_priv->ibss_bssid_sta_id);
1047         return il_remove_station(il, vif_priv->ibss_bssid_sta_id,
1048                                  vif->bss_conf.bssid);
1049 }
1050
1051 void
1052 il4965_free_tfds_in_queue(struct il_priv *il, int sta_id, int tid, int freed)
1053 {
1054         lockdep_assert_held(&il->sta_lock);
1055
1056         if (il->stations[sta_id].tid[tid].tfds_in_queue >= freed)
1057                 il->stations[sta_id].tid[tid].tfds_in_queue -= freed;
1058         else {
1059                 D_TX("free more than tfds_in_queue (%u:%d)\n",
1060                      il->stations[sta_id].tid[tid].tfds_in_queue, freed);
1061                 il->stations[sta_id].tid[tid].tfds_in_queue = 0;
1062         }
1063 }
1064
1065 #define IL_TX_QUEUE_MSK 0xfffff
1066
1067 static bool
1068 il4965_is_single_rx_stream(struct il_priv *il)
1069 {
1070         return il->current_ht_config.smps == IEEE80211_SMPS_STATIC ||
1071             il->current_ht_config.single_chain_sufficient;
1072 }
1073
1074 #define IL_NUM_RX_CHAINS_MULTIPLE       3
1075 #define IL_NUM_RX_CHAINS_SINGLE 2
1076 #define IL_NUM_IDLE_CHAINS_DUAL 2
1077 #define IL_NUM_IDLE_CHAINS_SINGLE       1
1078
1079 /*
1080  * Determine how many receiver/antenna chains to use.
1081  *
1082  * More provides better reception via diversity.  Fewer saves power
1083  * at the expense of throughput, but only when not in powersave to
1084  * start with.
1085  *
1086  * MIMO (dual stream) requires at least 2, but works better with 3.
1087  * This does not determine *which* chains to use, just how many.
1088  */
1089 static int
1090 il4965_get_active_rx_chain_count(struct il_priv *il)
1091 {
1092         /* # of Rx chains to use when expecting MIMO. */
1093         if (il4965_is_single_rx_stream(il))
1094                 return IL_NUM_RX_CHAINS_SINGLE;
1095         else
1096                 return IL_NUM_RX_CHAINS_MULTIPLE;
1097 }
1098
1099 /*
1100  * When we are in power saving mode, unless device support spatial
1101  * multiplexing power save, use the active count for rx chain count.
1102  */
1103 static int
1104 il4965_get_idle_rx_chain_count(struct il_priv *il, int active_cnt)
1105 {
1106         /* # Rx chains when idling, depending on SMPS mode */
1107         switch (il->current_ht_config.smps) {
1108         case IEEE80211_SMPS_STATIC:
1109         case IEEE80211_SMPS_DYNAMIC:
1110                 return IL_NUM_IDLE_CHAINS_SINGLE;
1111         case IEEE80211_SMPS_OFF:
1112                 return active_cnt;
1113         default:
1114                 WARN(1, "invalid SMPS mode %d", il->current_ht_config.smps);
1115                 return active_cnt;
1116         }
1117 }
1118
1119 /* up to 4 chains */
1120 static u8
1121 il4965_count_chain_bitmap(u32 chain_bitmap)
1122 {
1123         u8 res;
1124         res = (chain_bitmap & BIT(0)) >> 0;
1125         res += (chain_bitmap & BIT(1)) >> 1;
1126         res += (chain_bitmap & BIT(2)) >> 2;
1127         res += (chain_bitmap & BIT(3)) >> 3;
1128         return res;
1129 }
1130
1131 /*
1132  * il4965_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
1133  *
1134  * Selects how many and which Rx receivers/antennas/chains to use.
1135  * This should not be used for scan command ... it puts data in wrong place.
1136  */
1137 void
1138 il4965_set_rxon_chain(struct il_priv *il)
1139 {
1140         bool is_single = il4965_is_single_rx_stream(il);
1141         bool is_cam = !test_bit(S_POWER_PMI, &il->status);
1142         u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
1143         u32 active_chains;
1144         u16 rx_chain;
1145
1146         /* Tell uCode which antennas are actually connected.
1147          * Before first association, we assume all antennas are connected.
1148          * Just after first association, il4965_chain_noise_calibration()
1149          *    checks which antennas actually *are* connected. */
1150         if (il->chain_noise_data.active_chains)
1151                 active_chains = il->chain_noise_data.active_chains;
1152         else
1153                 active_chains = il->hw_params.valid_rx_ant;
1154
1155         rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
1156
1157         /* How many receivers should we use? */
1158         active_rx_cnt = il4965_get_active_rx_chain_count(il);
1159         idle_rx_cnt = il4965_get_idle_rx_chain_count(il, active_rx_cnt);
1160
1161         /* correct rx chain count according hw settings
1162          * and chain noise calibration
1163          */
1164         valid_rx_cnt = il4965_count_chain_bitmap(active_chains);
1165         if (valid_rx_cnt < active_rx_cnt)
1166                 active_rx_cnt = valid_rx_cnt;
1167
1168         if (valid_rx_cnt < idle_rx_cnt)
1169                 idle_rx_cnt = valid_rx_cnt;
1170
1171         rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
1172         rx_chain |= idle_rx_cnt << RXON_RX_CHAIN_CNT_POS;
1173
1174         il->staging.rx_chain = cpu_to_le16(rx_chain);
1175
1176         if (!is_single && active_rx_cnt >= IL_NUM_RX_CHAINS_SINGLE && is_cam)
1177                 il->staging.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
1178         else
1179                 il->staging.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
1180
1181         D_ASSOC("rx_chain=0x%X active=%d idle=%d\n", il->staging.rx_chain,
1182                 active_rx_cnt, idle_rx_cnt);
1183
1184         WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
1185                 active_rx_cnt < idle_rx_cnt);
1186 }
1187
1188 static const char *
1189 il4965_get_fh_string(int cmd)
1190 {
1191         switch (cmd) {
1192                 IL_CMD(FH49_RSCSR_CHNL0_STTS_WPTR_REG);
1193                 IL_CMD(FH49_RSCSR_CHNL0_RBDCB_BASE_REG);
1194                 IL_CMD(FH49_RSCSR_CHNL0_WPTR);
1195                 IL_CMD(FH49_MEM_RCSR_CHNL0_CONFIG_REG);
1196                 IL_CMD(FH49_MEM_RSSR_SHARED_CTRL_REG);
1197                 IL_CMD(FH49_MEM_RSSR_RX_STATUS_REG);
1198                 IL_CMD(FH49_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
1199                 IL_CMD(FH49_TSSR_TX_STATUS_REG);
1200                 IL_CMD(FH49_TSSR_TX_ERROR_REG);
1201         default:
1202                 return "UNKNOWN";
1203         }
1204 }
1205
1206 int
1207 il4965_dump_fh(struct il_priv *il, char **buf, bool display)
1208 {
1209         int i;
1210 #ifdef CONFIG_IWLEGACY_DEBUG
1211         int pos = 0;
1212         size_t bufsz = 0;
1213 #endif
1214         static const u32 fh_tbl[] = {
1215                 FH49_RSCSR_CHNL0_STTS_WPTR_REG,
1216                 FH49_RSCSR_CHNL0_RBDCB_BASE_REG,
1217                 FH49_RSCSR_CHNL0_WPTR,
1218                 FH49_MEM_RCSR_CHNL0_CONFIG_REG,
1219                 FH49_MEM_RSSR_SHARED_CTRL_REG,
1220                 FH49_MEM_RSSR_RX_STATUS_REG,
1221                 FH49_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
1222                 FH49_TSSR_TX_STATUS_REG,
1223                 FH49_TSSR_TX_ERROR_REG
1224         };
1225 #ifdef CONFIG_IWLEGACY_DEBUG
1226         if (display) {
1227                 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
1228                 *buf = kmalloc(bufsz, GFP_KERNEL);
1229                 if (!*buf)
1230                         return -ENOMEM;
1231                 pos +=
1232                     scnprintf(*buf + pos, bufsz - pos, "FH register values:\n");
1233                 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
1234                         pos +=
1235                             scnprintf(*buf + pos, bufsz - pos,
1236                                       "  %34s: 0X%08x\n",
1237                                       il4965_get_fh_string(fh_tbl[i]),
1238                                       il_rd(il, fh_tbl[i]));
1239                 }
1240                 return pos;
1241         }
1242 #endif
1243         IL_ERR("FH register values:\n");
1244         for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
1245                 IL_ERR("  %34s: 0X%08x\n", il4965_get_fh_string(fh_tbl[i]),
1246                        il_rd(il, fh_tbl[i]));
1247         }
1248         return 0;
1249 }
1250
1251 static void
1252 il4965_hdl_missed_beacon(struct il_priv *il, struct il_rx_buf *rxb)
1253 {
1254         struct il_rx_pkt *pkt = rxb_addr(rxb);
1255         struct il_missed_beacon_notif *missed_beacon;
1256
1257         missed_beacon = &pkt->u.missed_beacon;
1258         if (le32_to_cpu(missed_beacon->consecutive_missed_beacons) >
1259             il->missed_beacon_threshold) {
1260                 D_CALIB("missed bcn cnsq %d totl %d rcd %d expctd %d\n",
1261                         le32_to_cpu(missed_beacon->consecutive_missed_beacons),
1262                         le32_to_cpu(missed_beacon->total_missed_becons),
1263                         le32_to_cpu(missed_beacon->num_recvd_beacons),
1264                         le32_to_cpu(missed_beacon->num_expected_beacons));
1265                 if (!test_bit(S_SCANNING, &il->status))
1266                         il4965_init_sensitivity(il);
1267         }
1268 }
1269
1270 /* Calculate noise level, based on measurements during network silence just
1271  *   before arriving beacon.  This measurement can be done only if we know
1272  *   exactly when to expect beacons, therefore only when we're associated. */
1273 static void
1274 il4965_rx_calc_noise(struct il_priv *il)
1275 {
1276         struct stats_rx_non_phy *rx_info;
1277         int num_active_rx = 0;
1278         int total_silence = 0;
1279         int bcn_silence_a, bcn_silence_b, bcn_silence_c;
1280         int last_rx_noise;
1281
1282         rx_info = &(il->_4965.stats.rx.general);
1283         bcn_silence_a =
1284             le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
1285         bcn_silence_b =
1286             le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
1287         bcn_silence_c =
1288             le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
1289
1290         if (bcn_silence_a) {
1291                 total_silence += bcn_silence_a;
1292                 num_active_rx++;
1293         }
1294         if (bcn_silence_b) {
1295                 total_silence += bcn_silence_b;
1296                 num_active_rx++;
1297         }
1298         if (bcn_silence_c) {
1299                 total_silence += bcn_silence_c;
1300                 num_active_rx++;
1301         }
1302
1303         /* Average among active antennas */
1304         if (num_active_rx)
1305                 last_rx_noise = (total_silence / num_active_rx) - 107;
1306         else
1307                 last_rx_noise = IL_NOISE_MEAS_NOT_AVAILABLE;
1308
1309         D_CALIB("inband silence a %u, b %u, c %u, dBm %d\n", bcn_silence_a,
1310                 bcn_silence_b, bcn_silence_c, last_rx_noise);
1311 }
1312
1313 #ifdef CONFIG_IWLEGACY_DEBUGFS
1314 /*
1315  *  based on the assumption of all stats counter are in DWORD
1316  *  FIXME: This function is for debugging, do not deal with
1317  *  the case of counters roll-over.
1318  */
1319 static void
1320 il4965_accumulative_stats(struct il_priv *il, __le32 * stats)
1321 {
1322         int i, size;
1323         __le32 *prev_stats;
1324         u32 *accum_stats;
1325         u32 *delta, *max_delta;
1326         struct stats_general_common *general, *accum_general;
1327
1328         prev_stats = (__le32 *) &il->_4965.stats;
1329         accum_stats = (u32 *) &il->_4965.accum_stats;
1330         size = sizeof(struct il_notif_stats);
1331         general = &il->_4965.stats.general.common;
1332         accum_general = &il->_4965.accum_stats.general.common;
1333         delta = (u32 *) &il->_4965.delta_stats;
1334         max_delta = (u32 *) &il->_4965.max_delta;
1335
1336         for (i = sizeof(__le32); i < size;
1337              i +=
1338              sizeof(__le32), stats++, prev_stats++, delta++, max_delta++,
1339              accum_stats++) {
1340                 if (le32_to_cpu(*stats) > le32_to_cpu(*prev_stats)) {
1341                         *delta =
1342                             (le32_to_cpu(*stats) - le32_to_cpu(*prev_stats));
1343                         *accum_stats += *delta;
1344                         if (*delta > *max_delta)
1345                                 *max_delta = *delta;
1346                 }
1347         }
1348
1349         /* reset accumulative stats for "no-counter" type stats */
1350         accum_general->temperature = general->temperature;
1351         accum_general->ttl_timestamp = general->ttl_timestamp;
1352 }
1353 #endif
1354
1355 static void
1356 il4965_hdl_stats(struct il_priv *il, struct il_rx_buf *rxb)
1357 {
1358         const int recalib_seconds = 60;
1359         bool change;
1360         struct il_rx_pkt *pkt = rxb_addr(rxb);
1361
1362         D_RX("Statistics notification received (%d vs %d).\n",
1363              (int)sizeof(struct il_notif_stats),
1364              le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK);
1365
1366         change =
1367             ((il->_4965.stats.general.common.temperature !=
1368               pkt->u.stats.general.common.temperature) ||
1369              ((il->_4965.stats.flag & STATS_REPLY_FLG_HT40_MODE_MSK) !=
1370               (pkt->u.stats.flag & STATS_REPLY_FLG_HT40_MODE_MSK)));
1371 #ifdef CONFIG_IWLEGACY_DEBUGFS
1372         il4965_accumulative_stats(il, (__le32 *) &pkt->u.stats);
1373 #endif
1374
1375         /* TODO: reading some of stats is unneeded */
1376         memcpy(&il->_4965.stats, &pkt->u.stats, sizeof(il->_4965.stats));
1377
1378         set_bit(S_STATS, &il->status);
1379
1380         /*
1381          * Reschedule the stats timer to occur in recalib_seconds to ensure
1382          * we get a thermal update even if the uCode doesn't give us one
1383          */
1384         mod_timer(&il->stats_periodic,
1385                   jiffies + msecs_to_jiffies(recalib_seconds * 1000));
1386
1387         if (unlikely(!test_bit(S_SCANNING, &il->status)) &&
1388             (pkt->hdr.cmd == N_STATS)) {
1389                 il4965_rx_calc_noise(il);
1390                 queue_work(il->workqueue, &il->run_time_calib_work);
1391         }
1392
1393         if (change)
1394                 il4965_temperature_calib(il);
1395 }
1396
1397 static void
1398 il4965_hdl_c_stats(struct il_priv *il, struct il_rx_buf *rxb)
1399 {
1400         struct il_rx_pkt *pkt = rxb_addr(rxb);
1401
1402         if (le32_to_cpu(pkt->u.stats.flag) & UCODE_STATS_CLEAR_MSK) {
1403 #ifdef CONFIG_IWLEGACY_DEBUGFS
1404                 memset(&il->_4965.accum_stats, 0,
1405                        sizeof(struct il_notif_stats));
1406                 memset(&il->_4965.delta_stats, 0,
1407                        sizeof(struct il_notif_stats));
1408                 memset(&il->_4965.max_delta, 0, sizeof(struct il_notif_stats));
1409 #endif
1410                 D_RX("Statistics have been cleared\n");
1411         }
1412         il4965_hdl_stats(il, rxb);
1413 }
1414
1415
1416 /*
1417  * mac80211 queues, ACs, hardware queues, FIFOs.
1418  *
1419  * Cf. https://wireless.wiki.kernel.org/en/developers/Documentation/mac80211/queues
1420  *
1421  * Mac80211 uses the following numbers, which we get as from it
1422  * by way of skb_get_queue_mapping(skb):
1423  *
1424  *     VO      0
1425  *     VI      1
1426  *     BE      2
1427  *     BK      3
1428  *
1429  *
1430  * Regular (not A-MPDU) frames are put into hardware queues corresponding
1431  * to the FIFOs, see comments in iwl-prph.h. Aggregated frames get their
1432  * own queue per aggregation session (RA/TID combination), such queues are
1433  * set up to map into FIFOs too, for which we need an AC->FIFO mapping. In
1434  * order to map frames to the right queue, we also need an AC->hw queue
1435  * mapping. This is implemented here.
1436  *
1437  * Due to the way hw queues are set up (by the hw specific modules like
1438  * 4965.c), the AC->hw queue mapping is the identity
1439  * mapping.
1440  */
1441
1442 static const u8 tid_to_ac[] = {
1443         IEEE80211_AC_BE,
1444         IEEE80211_AC_BK,
1445         IEEE80211_AC_BK,
1446         IEEE80211_AC_BE,
1447         IEEE80211_AC_VI,
1448         IEEE80211_AC_VI,
1449         IEEE80211_AC_VO,
1450         IEEE80211_AC_VO
1451 };
1452
1453 static inline int
1454 il4965_get_ac_from_tid(u16 tid)
1455 {
1456         if (likely(tid < ARRAY_SIZE(tid_to_ac)))
1457                 return tid_to_ac[tid];
1458
1459         /* no support for TIDs 8-15 yet */
1460         return -EINVAL;
1461 }
1462
1463 static inline int
1464 il4965_get_fifo_from_tid(u16 tid)
1465 {
1466         static const u8 ac_to_fifo[] = {
1467                 IL_TX_FIFO_VO,
1468                 IL_TX_FIFO_VI,
1469                 IL_TX_FIFO_BE,
1470                 IL_TX_FIFO_BK,
1471         };
1472
1473         if (likely(tid < ARRAY_SIZE(tid_to_ac)))
1474                 return ac_to_fifo[tid_to_ac[tid]];
1475
1476         /* no support for TIDs 8-15 yet */
1477         return -EINVAL;
1478 }
1479
1480 /*
1481  * handle build C_TX command notification.
1482  */
1483 static void
1484 il4965_tx_cmd_build_basic(struct il_priv *il, struct sk_buff *skb,
1485                           struct il_tx_cmd *tx_cmd,
1486                           struct ieee80211_tx_info *info,
1487                           struct ieee80211_hdr *hdr, u8 std_id)
1488 {
1489         __le16 fc = hdr->frame_control;
1490         __le32 tx_flags = tx_cmd->tx_flags;
1491
1492         tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
1493         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
1494                 tx_flags |= TX_CMD_FLG_ACK_MSK;
1495                 if (ieee80211_is_mgmt(fc))
1496                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1497                 if (ieee80211_is_probe_resp(fc) &&
1498                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
1499                         tx_flags |= TX_CMD_FLG_TSF_MSK;
1500         } else {
1501                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
1502                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1503         }
1504
1505         if (ieee80211_is_back_req(fc))
1506                 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
1507
1508         tx_cmd->sta_id = std_id;
1509         if (ieee80211_has_morefrags(fc))
1510                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
1511
1512         if (ieee80211_is_data_qos(fc)) {
1513                 u8 *qc = ieee80211_get_qos_ctl(hdr);
1514                 tx_cmd->tid_tspec = qc[0] & 0xf;
1515                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
1516         } else {
1517                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1518         }
1519
1520         il_tx_cmd_protection(il, info, fc, &tx_flags);
1521
1522         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
1523         if (ieee80211_is_mgmt(fc)) {
1524                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
1525                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
1526                 else
1527                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
1528         } else {
1529                 tx_cmd->timeout.pm_frame_timeout = 0;
1530         }
1531
1532         tx_cmd->driver_txop = 0;
1533         tx_cmd->tx_flags = tx_flags;
1534         tx_cmd->next_frame_len = 0;
1535 }
1536
1537 static void
1538 il4965_tx_cmd_build_rate(struct il_priv *il,
1539                          struct il_tx_cmd *tx_cmd,
1540                          struct ieee80211_tx_info *info,
1541                          struct ieee80211_sta *sta,
1542                          __le16 fc)
1543 {
1544         const u8 rts_retry_limit = 60;
1545         u32 rate_flags;
1546         int rate_idx;
1547         u8 data_retry_limit;
1548         u8 rate_plcp;
1549
1550         /* Set retry limit on DATA packets and Probe Responses */
1551         if (ieee80211_is_probe_resp(fc))
1552                 data_retry_limit = 3;
1553         else
1554                 data_retry_limit = IL4965_DEFAULT_TX_RETRY;
1555         tx_cmd->data_retry_limit = data_retry_limit;
1556         /* Set retry limit on RTS packets */
1557         tx_cmd->rts_retry_limit = min(data_retry_limit, rts_retry_limit);
1558
1559         /* DATA packets will use the uCode station table for rate/antenna
1560          * selection */
1561         if (ieee80211_is_data(fc)) {
1562                 tx_cmd->initial_rate_idx = 0;
1563                 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
1564                 return;
1565         }
1566
1567         /**
1568          * If the current TX rate stored in mac80211 has the MCS bit set, it's
1569          * not really a TX rate.  Thus, we use the lowest supported rate for
1570          * this band.  Also use the lowest supported rate if the stored rate
1571          * idx is invalid.
1572          */
1573         rate_idx = info->control.rates[0].idx;
1574         if ((info->control.rates[0].flags & IEEE80211_TX_RC_MCS) || rate_idx < 0
1575             || rate_idx > RATE_COUNT_LEGACY)
1576                 rate_idx = rate_lowest_index(&il->bands[info->band], sta);
1577         /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
1578         if (info->band == NL80211_BAND_5GHZ)
1579                 rate_idx += IL_FIRST_OFDM_RATE;
1580         /* Get PLCP rate for tx_cmd->rate_n_flags */
1581         rate_plcp = il_rates[rate_idx].plcp;
1582         /* Zero out flags for this packet */
1583         rate_flags = 0;
1584
1585         /* Set CCK flag as needed */
1586         if (rate_idx >= IL_FIRST_CCK_RATE && rate_idx <= IL_LAST_CCK_RATE)
1587                 rate_flags |= RATE_MCS_CCK_MSK;
1588
1589         /* Set up antennas */
1590         il4965_toggle_tx_ant(il, &il->mgmt_tx_ant, il->hw_params.valid_tx_ant);
1591         rate_flags |= BIT(il->mgmt_tx_ant) << RATE_MCS_ANT_POS;
1592
1593         /* Set the rate in the TX cmd */
1594         tx_cmd->rate_n_flags = cpu_to_le32(rate_plcp | rate_flags);
1595 }
1596
1597 static void
1598 il4965_tx_cmd_build_hwcrypto(struct il_priv *il, struct ieee80211_tx_info *info,
1599                              struct il_tx_cmd *tx_cmd, struct sk_buff *skb_frag,
1600                              int sta_id)
1601 {
1602         struct ieee80211_key_conf *keyconf = info->control.hw_key;
1603
1604         switch (keyconf->cipher) {
1605         case WLAN_CIPHER_SUITE_CCMP:
1606                 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
1607                 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
1608                 if (info->flags & IEEE80211_TX_CTL_AMPDU)
1609                         tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
1610                 D_TX("tx_cmd with AES hwcrypto\n");
1611                 break;
1612
1613         case WLAN_CIPHER_SUITE_TKIP:
1614                 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
1615                 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
1616                 D_TX("tx_cmd with tkip hwcrypto\n");
1617                 break;
1618
1619         case WLAN_CIPHER_SUITE_WEP104:
1620                 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
1621                 fallthrough;
1622         case WLAN_CIPHER_SUITE_WEP40:
1623                 tx_cmd->sec_ctl |=
1624                     (TX_CMD_SEC_WEP | (keyconf->keyidx & TX_CMD_SEC_MSK) <<
1625                      TX_CMD_SEC_SHIFT);
1626
1627                 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
1628
1629                 D_TX("Configuring packet for WEP encryption " "with key %d\n",
1630                      keyconf->keyidx);
1631                 break;
1632
1633         default:
1634                 IL_ERR("Unknown encode cipher %x\n", keyconf->cipher);
1635                 break;
1636         }
1637 }
1638
1639 /*
1640  * start C_TX command process
1641  */
1642 int
1643 il4965_tx_skb(struct il_priv *il,
1644               struct ieee80211_sta *sta,
1645               struct sk_buff *skb)
1646 {
1647         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1648         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1649         struct il_station_priv *sta_priv = NULL;
1650         struct il_tx_queue *txq;
1651         struct il_queue *q;
1652         struct il_device_cmd *out_cmd;
1653         struct il_cmd_meta *out_meta;
1654         struct il_tx_cmd *tx_cmd;
1655         int txq_id;
1656         dma_addr_t phys_addr;
1657         dma_addr_t txcmd_phys;
1658         dma_addr_t scratch_phys;
1659         u16 len, firstlen, secondlen;
1660         u16 seq_number = 0;
1661         __le16 fc;
1662         u8 hdr_len;
1663         u8 sta_id;
1664         u8 wait_write_ptr = 0;
1665         u8 tid = 0;
1666         u8 *qc = NULL;
1667         unsigned long flags;
1668         bool is_agg = false;
1669
1670         spin_lock_irqsave(&il->lock, flags);
1671         if (il_is_rfkill(il)) {
1672                 D_DROP("Dropping - RF KILL\n");
1673                 goto drop_unlock;
1674         }
1675
1676         fc = hdr->frame_control;
1677
1678 #ifdef CONFIG_IWLEGACY_DEBUG
1679         if (ieee80211_is_auth(fc))
1680                 D_TX("Sending AUTH frame\n");
1681         else if (ieee80211_is_assoc_req(fc))
1682                 D_TX("Sending ASSOC frame\n");
1683         else if (ieee80211_is_reassoc_req(fc))
1684                 D_TX("Sending REASSOC frame\n");
1685 #endif
1686
1687         hdr_len = ieee80211_hdrlen(fc);
1688
1689         /* For management frames use broadcast id to do not break aggregation */
1690         if (!ieee80211_is_data(fc))
1691                 sta_id = il->hw_params.bcast_id;
1692         else {
1693                 /* Find idx into station table for destination station */
1694                 sta_id = il_sta_id_or_broadcast(il, sta);
1695
1696                 if (sta_id == IL_INVALID_STATION) {
1697                         D_DROP("Dropping - INVALID STATION: %pM\n", hdr->addr1);
1698                         goto drop_unlock;
1699                 }
1700         }
1701
1702         D_TX("station Id %d\n", sta_id);
1703
1704         if (sta)
1705                 sta_priv = (void *)sta->drv_priv;
1706
1707         if (sta_priv && sta_priv->asleep &&
1708             (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)) {
1709                 /*
1710                  * This sends an asynchronous command to the device,
1711                  * but we can rely on it being processed before the
1712                  * next frame is processed -- and the next frame to
1713                  * this station is the one that will consume this
1714                  * counter.
1715                  * For now set the counter to just 1 since we do not
1716                  * support uAPSD yet.
1717                  */
1718                 il4965_sta_modify_sleep_tx_count(il, sta_id, 1);
1719         }
1720
1721         /* FIXME: remove me ? */
1722         WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
1723
1724         /* Access category (AC) is also the queue number */
1725         txq_id = skb_get_queue_mapping(skb);
1726
1727         /* irqs already disabled/saved above when locking il->lock */
1728         spin_lock(&il->sta_lock);
1729
1730         if (ieee80211_is_data_qos(fc)) {
1731                 qc = ieee80211_get_qos_ctl(hdr);
1732                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
1733                 if (WARN_ON_ONCE(tid >= MAX_TID_COUNT)) {
1734                         spin_unlock(&il->sta_lock);
1735                         goto drop_unlock;
1736                 }
1737                 seq_number = il->stations[sta_id].tid[tid].seq_number;
1738                 seq_number &= IEEE80211_SCTL_SEQ;
1739                 hdr->seq_ctrl =
1740                     hdr->seq_ctrl & cpu_to_le16(IEEE80211_SCTL_FRAG);
1741                 hdr->seq_ctrl |= cpu_to_le16(seq_number);
1742                 seq_number += 0x10;
1743                 /* aggregation is on for this <sta,tid> */
1744                 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1745                     il->stations[sta_id].tid[tid].agg.state == IL_AGG_ON) {
1746                         txq_id = il->stations[sta_id].tid[tid].agg.txq_id;
1747                         is_agg = true;
1748                 }
1749         }
1750
1751         txq = &il->txq[txq_id];
1752         q = &txq->q;
1753
1754         if (unlikely(il_queue_space(q) < q->high_mark)) {
1755                 spin_unlock(&il->sta_lock);
1756                 goto drop_unlock;
1757         }
1758
1759         if (ieee80211_is_data_qos(fc)) {
1760                 il->stations[sta_id].tid[tid].tfds_in_queue++;
1761                 if (!ieee80211_has_morefrags(fc))
1762                         il->stations[sta_id].tid[tid].seq_number = seq_number;
1763         }
1764
1765         spin_unlock(&il->sta_lock);
1766
1767         txq->skbs[q->write_ptr] = skb;
1768
1769         /* Set up first empty entry in queue's array of Tx/cmd buffers */
1770         out_cmd = txq->cmd[q->write_ptr];
1771         out_meta = &txq->meta[q->write_ptr];
1772         tx_cmd = container_of(&out_cmd->cmd.tx, struct il_tx_cmd, __hdr);
1773         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
1774         memset(tx_cmd, 0, sizeof(struct il_tx_cmd));
1775
1776         /*
1777          * Set up the Tx-command (not MAC!) header.
1778          * Store the chosen Tx queue and TFD idx within the sequence field;
1779          * after Tx, uCode's Tx response will return this value so driver can
1780          * locate the frame within the tx queue and do post-tx processing.
1781          */
1782         out_cmd->hdr.cmd = C_TX;
1783         out_cmd->hdr.sequence =
1784             cpu_to_le16((u16)
1785                         (QUEUE_TO_SEQ(txq_id) | IDX_TO_SEQ(q->write_ptr)));
1786
1787         /* Copy MAC header from skb into command buffer */
1788         memcpy(tx_cmd->hdr, hdr, hdr_len);
1789
1790         /* Total # bytes to be transmitted */
1791         tx_cmd->len = cpu_to_le16((u16) skb->len);
1792
1793         if (info->control.hw_key)
1794                 il4965_tx_cmd_build_hwcrypto(il, info, tx_cmd, skb, sta_id);
1795
1796         /* TODO need this for burst mode later on */
1797         il4965_tx_cmd_build_basic(il, skb, tx_cmd, info, hdr, sta_id);
1798
1799         il4965_tx_cmd_build_rate(il, tx_cmd, info, sta, fc);
1800
1801         /*
1802          * Use the first empty entry in this queue's command buffer array
1803          * to contain the Tx command and MAC header concatenated together
1804          * (payload data will be in another buffer).
1805          * Size of this varies, due to varying MAC header length.
1806          * If end is not dword aligned, we'll have 2 extra bytes at the end
1807          * of the MAC header (device reads on dword boundaries).
1808          * We'll tell device about this padding later.
1809          */
1810         len = sizeof(struct il_tx_cmd) + sizeof(struct il_cmd_header) + hdr_len;
1811         firstlen = (len + 3) & ~3;
1812
1813         /* Tell NIC about any 2-byte padding after MAC header */
1814         if (firstlen != len)
1815                 tx_cmd->tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
1816
1817         /* Physical address of this Tx command's header (not MAC header!),
1818          * within command buffer array. */
1819         txcmd_phys = dma_map_single(&il->pci_dev->dev, &out_cmd->hdr, firstlen,
1820                                     DMA_BIDIRECTIONAL);
1821         if (unlikely(dma_mapping_error(&il->pci_dev->dev, txcmd_phys)))
1822                 goto drop_unlock;
1823
1824         /* Set up TFD's 2nd entry to point directly to remainder of skb,
1825          * if any (802.11 null frames have no payload). */
1826         secondlen = skb->len - hdr_len;
1827         if (secondlen > 0) {
1828                 phys_addr = dma_map_single(&il->pci_dev->dev, skb->data + hdr_len,
1829                                            secondlen, DMA_TO_DEVICE);
1830                 if (unlikely(dma_mapping_error(&il->pci_dev->dev, phys_addr)))
1831                         goto drop_unlock;
1832         }
1833
1834         /* Add buffer containing Tx command and MAC(!) header to TFD's
1835          * first entry */
1836         il->ops->txq_attach_buf_to_tfd(il, txq, txcmd_phys, firstlen, 1, 0);
1837         dma_unmap_addr_set(out_meta, mapping, txcmd_phys);
1838         dma_unmap_len_set(out_meta, len, firstlen);
1839         if (secondlen)
1840                 il->ops->txq_attach_buf_to_tfd(il, txq, phys_addr, secondlen,
1841                                                0, 0);
1842
1843         if (!ieee80211_has_morefrags(hdr->frame_control)) {
1844                 txq->need_update = 1;
1845         } else {
1846                 wait_write_ptr = 1;
1847                 txq->need_update = 0;
1848         }
1849
1850         scratch_phys =
1851             txcmd_phys + sizeof(struct il_cmd_header) +
1852             offsetof(struct il_tx_cmd, scratch);
1853
1854         /* take back ownership of DMA buffer to enable update */
1855         dma_sync_single_for_cpu(&il->pci_dev->dev, txcmd_phys, firstlen,
1856                                 DMA_BIDIRECTIONAL);
1857         tx_cmd->dram_lsb_ptr = cpu_to_le32(scratch_phys);
1858         tx_cmd->dram_msb_ptr = il_get_dma_hi_addr(scratch_phys);
1859
1860         il_update_stats(il, true, fc, skb->len);
1861
1862         D_TX("sequence nr = 0X%x\n", le16_to_cpu(out_cmd->hdr.sequence));
1863         D_TX("tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags));
1864         il_print_hex_dump(il, IL_DL_TX, (u8 *) tx_cmd, sizeof(*tx_cmd));
1865         il_print_hex_dump(il, IL_DL_TX, (u8 *) tx_cmd->hdr, hdr_len);
1866
1867         /* Set up entry for this TFD in Tx byte-count array */
1868         if (info->flags & IEEE80211_TX_CTL_AMPDU)
1869                 il->ops->txq_update_byte_cnt_tbl(il, txq, le16_to_cpu(tx_cmd->len));
1870
1871         dma_sync_single_for_device(&il->pci_dev->dev, txcmd_phys, firstlen,
1872                                    DMA_BIDIRECTIONAL);
1873
1874         /* Tell device the write idx *just past* this latest filled TFD */
1875         q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd);
1876         il_txq_update_write_ptr(il, txq);
1877         spin_unlock_irqrestore(&il->lock, flags);
1878
1879         /*
1880          * At this point the frame is "transmitted" successfully
1881          * and we will get a TX status notification eventually,
1882          * regardless of the value of ret. "ret" only indicates
1883          * whether or not we should update the write pointer.
1884          */
1885
1886         /*
1887          * Avoid atomic ops if it isn't an associated client.
1888          * Also, if this is a packet for aggregation, don't
1889          * increase the counter because the ucode will stop
1890          * aggregation queues when their respective station
1891          * goes to sleep.
1892          */
1893         if (sta_priv && sta_priv->client && !is_agg)
1894                 atomic_inc(&sta_priv->pending_frames);
1895
1896         if (il_queue_space(q) < q->high_mark && il->mac80211_registered) {
1897                 if (wait_write_ptr) {
1898                         spin_lock_irqsave(&il->lock, flags);
1899                         txq->need_update = 1;
1900                         il_txq_update_write_ptr(il, txq);
1901                         spin_unlock_irqrestore(&il->lock, flags);
1902                 } else {
1903                         il_stop_queue(il, txq);
1904                 }
1905         }
1906
1907         return 0;
1908
1909 drop_unlock:
1910         spin_unlock_irqrestore(&il->lock, flags);
1911         return -1;
1912 }
1913
1914 static inline int
1915 il4965_alloc_dma_ptr(struct il_priv *il, struct il_dma_ptr *ptr, size_t size)
1916 {
1917         ptr->addr = dma_alloc_coherent(&il->pci_dev->dev, size, &ptr->dma,
1918                                        GFP_KERNEL);
1919         if (!ptr->addr)
1920                 return -ENOMEM;
1921         ptr->size = size;
1922         return 0;
1923 }
1924
1925 static inline void
1926 il4965_free_dma_ptr(struct il_priv *il, struct il_dma_ptr *ptr)
1927 {
1928         if (unlikely(!ptr->addr))
1929                 return;
1930
1931         dma_free_coherent(&il->pci_dev->dev, ptr->size, ptr->addr, ptr->dma);
1932         memset(ptr, 0, sizeof(*ptr));
1933 }
1934
1935 /*
1936  * il4965_hw_txq_ctx_free - Free TXQ Context
1937  *
1938  * Destroy all TX DMA queues and structures
1939  */
1940 void
1941 il4965_hw_txq_ctx_free(struct il_priv *il)
1942 {
1943         int txq_id;
1944
1945         /* Tx queues */
1946         if (il->txq) {
1947                 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++)
1948                         if (txq_id == il->cmd_queue)
1949                                 il_cmd_queue_free(il);
1950                         else
1951                                 il_tx_queue_free(il, txq_id);
1952         }
1953         il4965_free_dma_ptr(il, &il->kw);
1954
1955         il4965_free_dma_ptr(il, &il->scd_bc_tbls);
1956
1957         /* free tx queue structure */
1958         il_free_txq_mem(il);
1959 }
1960
1961 /*
1962  * il4965_txq_ctx_alloc - allocate TX queue context
1963  * Allocate all Tx DMA structures and initialize them
1964  */
1965 int
1966 il4965_txq_ctx_alloc(struct il_priv *il)
1967 {
1968         int ret, txq_id;
1969         unsigned long flags;
1970
1971         /* Free all tx/cmd queues and keep-warm buffer */
1972         il4965_hw_txq_ctx_free(il);
1973
1974         ret =
1975             il4965_alloc_dma_ptr(il, &il->scd_bc_tbls,
1976                                  il->hw_params.scd_bc_tbls_size);
1977         if (ret) {
1978                 IL_ERR("Scheduler BC Table allocation failed\n");
1979                 goto error_bc_tbls;
1980         }
1981         /* Alloc keep-warm buffer */
1982         ret = il4965_alloc_dma_ptr(il, &il->kw, IL_KW_SIZE);
1983         if (ret) {
1984                 IL_ERR("Keep Warm allocation failed\n");
1985                 goto error_kw;
1986         }
1987
1988         /* allocate tx queue structure */
1989         ret = il_alloc_txq_mem(il);
1990         if (ret)
1991                 goto error;
1992
1993         spin_lock_irqsave(&il->lock, flags);
1994
1995         /* Turn off all Tx DMA fifos */
1996         il4965_txq_set_sched(il, 0);
1997
1998         /* Tell NIC where to find the "keep warm" buffer */
1999         il_wr(il, FH49_KW_MEM_ADDR_REG, il->kw.dma >> 4);
2000
2001         spin_unlock_irqrestore(&il->lock, flags);
2002
2003         /* Alloc and init all Tx queues, including the command queue (#4/#9) */
2004         for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) {
2005                 ret = il_tx_queue_init(il, txq_id);
2006                 if (ret) {
2007                         IL_ERR("Tx %d queue init failed\n", txq_id);
2008                         goto error;
2009                 }
2010         }
2011
2012         return ret;
2013
2014 error:
2015         il4965_hw_txq_ctx_free(il);
2016         il4965_free_dma_ptr(il, &il->kw);
2017 error_kw:
2018         il4965_free_dma_ptr(il, &il->scd_bc_tbls);
2019 error_bc_tbls:
2020         return ret;
2021 }
2022
2023 void
2024 il4965_txq_ctx_reset(struct il_priv *il)
2025 {
2026         int txq_id;
2027         unsigned long flags;
2028
2029         spin_lock_irqsave(&il->lock, flags);
2030
2031         /* Turn off all Tx DMA fifos */
2032         il4965_txq_set_sched(il, 0);
2033         /* Tell NIC where to find the "keep warm" buffer */
2034         il_wr(il, FH49_KW_MEM_ADDR_REG, il->kw.dma >> 4);
2035
2036         spin_unlock_irqrestore(&il->lock, flags);
2037
2038         /* Alloc and init all Tx queues, including the command queue (#4) */
2039         for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++)
2040                 il_tx_queue_reset(il, txq_id);
2041 }
2042
2043 static void
2044 il4965_txq_ctx_unmap(struct il_priv *il)
2045 {
2046         int txq_id;
2047
2048         if (!il->txq)
2049                 return;
2050
2051         /* Unmap DMA from host system and free skb's */
2052         for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++)
2053                 if (txq_id == il->cmd_queue)
2054                         il_cmd_queue_unmap(il);
2055                 else
2056                         il_tx_queue_unmap(il, txq_id);
2057 }
2058
2059 /*
2060  * il4965_txq_ctx_stop - Stop all Tx DMA channels
2061  */
2062 void
2063 il4965_txq_ctx_stop(struct il_priv *il)
2064 {
2065         int ch, ret;
2066
2067         _il_wr_prph(il, IL49_SCD_TXFACT, 0);
2068
2069         /* Stop each Tx DMA channel, and wait for it to be idle */
2070         for (ch = 0; ch < il->hw_params.dma_chnl_num; ch++) {
2071                 _il_wr(il, FH49_TCSR_CHNL_TX_CONFIG_REG(ch), 0x0);
2072                 ret =
2073                     _il_poll_bit(il, FH49_TSSR_TX_STATUS_REG,
2074                                  FH49_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch),
2075                                  FH49_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch),
2076                                  1000);
2077                 if (ret < 0)
2078                         IL_ERR("Timeout stopping DMA channel %d [0x%08x]",
2079                                ch, _il_rd(il, FH49_TSSR_TX_STATUS_REG));
2080         }
2081 }
2082
2083 /*
2084  * Find first available (lowest unused) Tx Queue, mark it "active".
2085  * Called only when finding queue for aggregation.
2086  * Should never return anything < 7, because they should already
2087  * be in use as EDCA AC (0-3), Command (4), reserved (5, 6)
2088  */
2089 static int
2090 il4965_txq_ctx_activate_free(struct il_priv *il)
2091 {
2092         int txq_id;
2093
2094         for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++)
2095                 if (!test_and_set_bit(txq_id, &il->txq_ctx_active_msk))
2096                         return txq_id;
2097         return -1;
2098 }
2099
2100 /*
2101  * il4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
2102  */
2103 static void
2104 il4965_tx_queue_stop_scheduler(struct il_priv *il, u16 txq_id)
2105 {
2106         /* Simply stop the queue, but don't change any configuration;
2107          * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
2108         il_wr_prph(il, IL49_SCD_QUEUE_STATUS_BITS(txq_id),
2109                    (0 << IL49_SCD_QUEUE_STTS_REG_POS_ACTIVE) |
2110                    (1 << IL49_SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
2111 }
2112
2113 /*
2114  * il4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
2115  */
2116 static int
2117 il4965_tx_queue_set_q2ratid(struct il_priv *il, u16 ra_tid, u16 txq_id)
2118 {
2119         u32 tbl_dw_addr;
2120         u32 tbl_dw;
2121         u16 scd_q2ratid;
2122
2123         scd_q2ratid = ra_tid & IL_SCD_QUEUE_RA_TID_MAP_RATID_MSK;
2124
2125         tbl_dw_addr =
2126             il->scd_base_addr + IL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id);
2127
2128         tbl_dw = il_read_targ_mem(il, tbl_dw_addr);
2129
2130         if (txq_id & 0x1)
2131                 tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
2132         else
2133                 tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
2134
2135         il_write_targ_mem(il, tbl_dw_addr, tbl_dw);
2136
2137         return 0;
2138 }
2139
2140 /*
2141  * il4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
2142  *
2143  * NOTE:  txq_id must be greater than IL49_FIRST_AMPDU_QUEUE,
2144  *        i.e. it must be one of the higher queues used for aggregation
2145  */
2146 static int
2147 il4965_txq_agg_enable(struct il_priv *il, int txq_id, int tx_fifo, int sta_id,
2148                       int tid, u16 ssn_idx)
2149 {
2150         unsigned long flags;
2151         u16 ra_tid;
2152         int ret;
2153
2154         if ((IL49_FIRST_AMPDU_QUEUE > txq_id) ||
2155             (IL49_FIRST_AMPDU_QUEUE +
2156              il->cfg->num_of_ampdu_queues <= txq_id)) {
2157                 IL_WARN("queue number out of range: %d, must be %d to %d\n",
2158                         txq_id, IL49_FIRST_AMPDU_QUEUE,
2159                         IL49_FIRST_AMPDU_QUEUE +
2160                         il->cfg->num_of_ampdu_queues - 1);
2161                 return -EINVAL;
2162         }
2163
2164         ra_tid = BUILD_RAxTID(sta_id, tid);
2165
2166         /* Modify device's station table to Tx this TID */
2167         ret = il4965_sta_tx_modify_enable_tid(il, sta_id, tid);
2168         if (ret)
2169                 return ret;
2170
2171         spin_lock_irqsave(&il->lock, flags);
2172
2173         /* Stop this Tx queue before configuring it */
2174         il4965_tx_queue_stop_scheduler(il, txq_id);
2175
2176         /* Map receiver-address / traffic-ID to this queue */
2177         il4965_tx_queue_set_q2ratid(il, ra_tid, txq_id);
2178
2179         /* Set this queue as a chain-building queue */
2180         il_set_bits_prph(il, IL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
2181
2182         /* Place first TFD at idx corresponding to start sequence number.
2183          * Assumes that ssn_idx is valid (!= 0xFFF) */
2184         il->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
2185         il->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
2186         il4965_set_wr_ptrs(il, txq_id, ssn_idx);
2187
2188         /* Set up Tx win size and frame limit for this queue */
2189         il_write_targ_mem(il,
2190                           il->scd_base_addr +
2191                           IL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id),
2192                           (SCD_WIN_SIZE << IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS)
2193                           & IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
2194
2195         il_write_targ_mem(il,
2196                           il->scd_base_addr +
2197                           IL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
2198                           (SCD_FRAME_LIMIT <<
2199                            IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
2200                           IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
2201
2202         il_set_bits_prph(il, IL49_SCD_INTERRUPT_MASK, (1 << txq_id));
2203
2204         /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
2205         il4965_tx_queue_set_status(il, &il->txq[txq_id], tx_fifo, 1);
2206
2207         spin_unlock_irqrestore(&il->lock, flags);
2208
2209         return 0;
2210 }
2211
2212 int
2213 il4965_tx_agg_start(struct il_priv *il, struct ieee80211_vif *vif,
2214                     struct ieee80211_sta *sta, u16 tid, u16 * ssn)
2215 {
2216         int sta_id;
2217         int tx_fifo;
2218         int txq_id;
2219         int ret;
2220         unsigned long flags;
2221         struct il_tid_data *tid_data;
2222
2223         /* FIXME: warning if tx fifo not found ? */
2224         tx_fifo = il4965_get_fifo_from_tid(tid);
2225         if (unlikely(tx_fifo < 0))
2226                 return tx_fifo;
2227
2228         D_HT("%s on ra = %pM tid = %d\n", __func__, sta->addr, tid);
2229
2230         sta_id = il_sta_id(sta);
2231         if (sta_id == IL_INVALID_STATION) {
2232                 IL_ERR("Start AGG on invalid station\n");
2233                 return -ENXIO;
2234         }
2235         if (unlikely(tid >= MAX_TID_COUNT))
2236                 return -EINVAL;
2237
2238         if (il->stations[sta_id].tid[tid].agg.state != IL_AGG_OFF) {
2239                 IL_ERR("Start AGG when state is not IL_AGG_OFF !\n");
2240                 return -ENXIO;
2241         }
2242
2243         txq_id = il4965_txq_ctx_activate_free(il);
2244         if (txq_id == -1) {
2245                 IL_ERR("No free aggregation queue available\n");
2246                 return -ENXIO;
2247         }
2248
2249         spin_lock_irqsave(&il->sta_lock, flags);
2250         tid_data = &il->stations[sta_id].tid[tid];
2251         *ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2252         tid_data->agg.txq_id = txq_id;
2253         il_set_swq_id(&il->txq[txq_id], il4965_get_ac_from_tid(tid), txq_id);
2254         spin_unlock_irqrestore(&il->sta_lock, flags);
2255
2256         ret = il4965_txq_agg_enable(il, txq_id, tx_fifo, sta_id, tid, *ssn);
2257         if (ret)
2258                 return ret;
2259
2260         spin_lock_irqsave(&il->sta_lock, flags);
2261         tid_data = &il->stations[sta_id].tid[tid];
2262         if (tid_data->tfds_in_queue == 0) {
2263                 D_HT("HW queue is empty\n");
2264                 tid_data->agg.state = IL_AGG_ON;
2265                 ret = IEEE80211_AMPDU_TX_START_IMMEDIATE;
2266         } else {
2267                 D_HT("HW queue is NOT empty: %d packets in HW queue\n",
2268                      tid_data->tfds_in_queue);
2269                 tid_data->agg.state = IL_EMPTYING_HW_QUEUE_ADDBA;
2270         }
2271         spin_unlock_irqrestore(&il->sta_lock, flags);
2272         return ret;
2273 }
2274
2275 /*
2276  * txq_id must be greater than IL49_FIRST_AMPDU_QUEUE
2277  * il->lock must be held by the caller
2278  */
2279 static int
2280 il4965_txq_agg_disable(struct il_priv *il, u16 txq_id, u16 ssn_idx, u8 tx_fifo)
2281 {
2282         if ((IL49_FIRST_AMPDU_QUEUE > txq_id) ||
2283             (IL49_FIRST_AMPDU_QUEUE +
2284              il->cfg->num_of_ampdu_queues <= txq_id)) {
2285                 IL_WARN("queue number out of range: %d, must be %d to %d\n",
2286                         txq_id, IL49_FIRST_AMPDU_QUEUE,
2287                         IL49_FIRST_AMPDU_QUEUE +
2288                         il->cfg->num_of_ampdu_queues - 1);
2289                 return -EINVAL;
2290         }
2291
2292         il4965_tx_queue_stop_scheduler(il, txq_id);
2293
2294         il_clear_bits_prph(il, IL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
2295
2296         il->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
2297         il->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
2298         /* supposes that ssn_idx is valid (!= 0xFFF) */
2299         il4965_set_wr_ptrs(il, txq_id, ssn_idx);
2300
2301         il_clear_bits_prph(il, IL49_SCD_INTERRUPT_MASK, (1 << txq_id));
2302         il_txq_ctx_deactivate(il, txq_id);
2303         il4965_tx_queue_set_status(il, &il->txq[txq_id], tx_fifo, 0);
2304
2305         return 0;
2306 }
2307
2308 int
2309 il4965_tx_agg_stop(struct il_priv *il, struct ieee80211_vif *vif,
2310                    struct ieee80211_sta *sta, u16 tid)
2311 {
2312         int tx_fifo_id, txq_id, sta_id, ssn;
2313         struct il_tid_data *tid_data;
2314         int write_ptr, read_ptr;
2315         unsigned long flags;
2316
2317         /* FIXME: warning if tx_fifo_id not found ? */
2318         tx_fifo_id = il4965_get_fifo_from_tid(tid);
2319         if (unlikely(tx_fifo_id < 0))
2320                 return tx_fifo_id;
2321
2322         sta_id = il_sta_id(sta);
2323
2324         if (sta_id == IL_INVALID_STATION) {
2325                 IL_ERR("Invalid station for AGG tid %d\n", tid);
2326                 return -ENXIO;
2327         }
2328
2329         spin_lock_irqsave(&il->sta_lock, flags);
2330
2331         tid_data = &il->stations[sta_id].tid[tid];
2332         ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4;
2333         txq_id = tid_data->agg.txq_id;
2334
2335         switch (il->stations[sta_id].tid[tid].agg.state) {
2336         case IL_EMPTYING_HW_QUEUE_ADDBA:
2337                 /*
2338                  * This can happen if the peer stops aggregation
2339                  * again before we've had a chance to drain the
2340                  * queue we selected previously, i.e. before the
2341                  * session was really started completely.
2342                  */
2343                 D_HT("AGG stop before setup done\n");
2344                 goto turn_off;
2345         case IL_AGG_ON:
2346                 break;
2347         default:
2348                 IL_WARN("Stopping AGG while state not ON or starting\n");
2349         }
2350
2351         write_ptr = il->txq[txq_id].q.write_ptr;
2352         read_ptr = il->txq[txq_id].q.read_ptr;
2353
2354         /* The queue is not empty */
2355         if (write_ptr != read_ptr) {
2356                 D_HT("Stopping a non empty AGG HW QUEUE\n");
2357                 il->stations[sta_id].tid[tid].agg.state =
2358                     IL_EMPTYING_HW_QUEUE_DELBA;
2359                 spin_unlock_irqrestore(&il->sta_lock, flags);
2360                 return 0;
2361         }
2362
2363         D_HT("HW queue is empty\n");
2364 turn_off:
2365         il->stations[sta_id].tid[tid].agg.state = IL_AGG_OFF;
2366
2367         /* do not restore/save irqs */
2368         spin_unlock(&il->sta_lock);
2369         spin_lock(&il->lock);
2370
2371         /*
2372          * the only reason this call can fail is queue number out of range,
2373          * which can happen if uCode is reloaded and all the station
2374          * information are lost. if it is outside the range, there is no need
2375          * to deactivate the uCode queue, just return "success" to allow
2376          *  mac80211 to clean up it own data.
2377          */
2378         il4965_txq_agg_disable(il, txq_id, ssn, tx_fifo_id);
2379         spin_unlock_irqrestore(&il->lock, flags);
2380
2381         ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2382
2383         return 0;
2384 }
2385
2386 int
2387 il4965_txq_check_empty(struct il_priv *il, int sta_id, u8 tid, int txq_id)
2388 {
2389         struct il_queue *q = &il->txq[txq_id].q;
2390         u8 *addr = il->stations[sta_id].sta.sta.addr;
2391         struct il_tid_data *tid_data = &il->stations[sta_id].tid[tid];
2392
2393         lockdep_assert_held(&il->sta_lock);
2394
2395         switch (il->stations[sta_id].tid[tid].agg.state) {
2396         case IL_EMPTYING_HW_QUEUE_DELBA:
2397                 /* We are reclaiming the last packet of the */
2398                 /* aggregated HW queue */
2399                 if (txq_id == tid_data->agg.txq_id &&
2400                     q->read_ptr == q->write_ptr) {
2401                         u16 ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2402                         int tx_fifo = il4965_get_fifo_from_tid(tid);
2403                         D_HT("HW queue empty: continue DELBA flow\n");
2404                         il4965_txq_agg_disable(il, txq_id, ssn, tx_fifo);
2405                         tid_data->agg.state = IL_AGG_OFF;
2406                         ieee80211_stop_tx_ba_cb_irqsafe(il->vif, addr, tid);
2407                 }
2408                 break;
2409         case IL_EMPTYING_HW_QUEUE_ADDBA:
2410                 /* We are reclaiming the last packet of the queue */
2411                 if (tid_data->tfds_in_queue == 0) {
2412                         D_HT("HW queue empty: continue ADDBA flow\n");
2413                         tid_data->agg.state = IL_AGG_ON;
2414                         ieee80211_start_tx_ba_cb_irqsafe(il->vif, addr, tid);
2415                 }
2416                 break;
2417         }
2418
2419         return 0;
2420 }
2421
2422 static void
2423 il4965_non_agg_tx_status(struct il_priv *il, const u8 *addr1)
2424 {
2425         struct ieee80211_sta *sta;
2426         struct il_station_priv *sta_priv;
2427
2428         rcu_read_lock();
2429         sta = ieee80211_find_sta(il->vif, addr1);
2430         if (sta) {
2431                 sta_priv = (void *)sta->drv_priv;
2432                 /* avoid atomic ops if this isn't a client */
2433                 if (sta_priv->client &&
2434                     atomic_dec_return(&sta_priv->pending_frames) == 0)
2435                         ieee80211_sta_block_awake(il->hw, sta, false);
2436         }
2437         rcu_read_unlock();
2438 }
2439
2440 static void
2441 il4965_tx_status(struct il_priv *il, struct sk_buff *skb, bool is_agg)
2442 {
2443         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2444
2445         if (!is_agg)
2446                 il4965_non_agg_tx_status(il, hdr->addr1);
2447
2448         ieee80211_tx_status_irqsafe(il->hw, skb);
2449 }
2450
2451 int
2452 il4965_tx_queue_reclaim(struct il_priv *il, int txq_id, int idx)
2453 {
2454         struct il_tx_queue *txq = &il->txq[txq_id];
2455         struct il_queue *q = &txq->q;
2456         int nfreed = 0;
2457         struct ieee80211_hdr *hdr;
2458         struct sk_buff *skb;
2459
2460         if (idx >= q->n_bd || il_queue_used(q, idx) == 0) {
2461                 IL_ERR("Read idx for DMA queue txq id (%d), idx %d, "
2462                        "is out of range [0-%d] %d %d.\n", txq_id, idx, q->n_bd,
2463                        q->write_ptr, q->read_ptr);
2464                 return 0;
2465         }
2466
2467         for (idx = il_queue_inc_wrap(idx, q->n_bd); q->read_ptr != idx;
2468              q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd)) {
2469
2470                 skb = txq->skbs[txq->q.read_ptr];
2471
2472                 if (WARN_ON_ONCE(skb == NULL))
2473                         continue;
2474
2475                 hdr = (struct ieee80211_hdr *) skb->data;
2476                 if (ieee80211_is_data_qos(hdr->frame_control))
2477                         nfreed++;
2478
2479                 il4965_tx_status(il, skb, txq_id >= IL4965_FIRST_AMPDU_QUEUE);
2480
2481                 txq->skbs[txq->q.read_ptr] = NULL;
2482                 il->ops->txq_free_tfd(il, txq);
2483         }
2484         return nfreed;
2485 }
2486
2487 /*
2488  * il4965_tx_status_reply_compressed_ba - Update tx status from block-ack
2489  *
2490  * Go through block-ack's bitmap of ACK'd frames, update driver's record of
2491  * ACK vs. not.  This gets sent to mac80211, then to rate scaling algo.
2492  */
2493 static int
2494 il4965_tx_status_reply_compressed_ba(struct il_priv *il, struct il_ht_agg *agg,
2495                                      struct il_compressed_ba_resp *ba_resp)
2496 {
2497         int i, sh, ack;
2498         u16 seq_ctl = le16_to_cpu(ba_resp->seq_ctl);
2499         u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
2500         int successes = 0;
2501         struct ieee80211_tx_info *info;
2502         u64 bitmap, sent_bitmap;
2503
2504         if (unlikely(!agg->wait_for_ba)) {
2505                 if (unlikely(ba_resp->bitmap))
2506                         IL_ERR("Received BA when not expected\n");
2507                 return -EINVAL;
2508         }
2509
2510         /* Mark that the expected block-ack response arrived */
2511         agg->wait_for_ba = 0;
2512         D_TX_REPLY("BA %d %d\n", agg->start_idx, ba_resp->seq_ctl);
2513
2514         /* Calculate shift to align block-ack bits with our Tx win bits */
2515         sh = agg->start_idx - SEQ_TO_IDX(seq_ctl >> 4);
2516         if (sh < 0)             /* tbw something is wrong with indices */
2517                 sh += 0x100;
2518
2519         if (agg->frame_count > (64 - sh)) {
2520                 D_TX_REPLY("more frames than bitmap size");
2521                 return -1;
2522         }
2523
2524         /* don't use 64-bit values for now */
2525         bitmap = le64_to_cpu(ba_resp->bitmap) >> sh;
2526
2527         /* check for success or failure according to the
2528          * transmitted bitmap and block-ack bitmap */
2529         sent_bitmap = bitmap & agg->bitmap;
2530
2531         /* For each frame attempted in aggregation,
2532          * update driver's record of tx frame's status. */
2533         i = 0;
2534         while (sent_bitmap) {
2535                 ack = sent_bitmap & 1ULL;
2536                 successes += ack;
2537                 D_TX_REPLY("%s ON i=%d idx=%d raw=%d\n", ack ? "ACK" : "NACK",
2538                            i, (agg->start_idx + i) & 0xff, agg->start_idx + i);
2539                 sent_bitmap >>= 1;
2540                 ++i;
2541         }
2542
2543         D_TX_REPLY("Bitmap %llx\n", (unsigned long long)bitmap);
2544
2545         info = IEEE80211_SKB_CB(il->txq[scd_flow].skbs[agg->start_idx]);
2546         memset(&info->status, 0, sizeof(info->status));
2547         info->flags |= IEEE80211_TX_STAT_ACK;
2548         info->flags |= IEEE80211_TX_STAT_AMPDU;
2549         info->status.ampdu_ack_len = successes;
2550         info->status.ampdu_len = agg->frame_count;
2551         il4965_hwrate_to_tx_control(il, agg->rate_n_flags, info);
2552
2553         return 0;
2554 }
2555
2556 static inline bool
2557 il4965_is_tx_success(u32 status)
2558 {
2559         status &= TX_STATUS_MSK;
2560         return (status == TX_STATUS_SUCCESS || status == TX_STATUS_DIRECT_DONE);
2561 }
2562
2563 static u8
2564 il4965_find_station(struct il_priv *il, const u8 *addr)
2565 {
2566         int i;
2567         int start = 0;
2568         int ret = IL_INVALID_STATION;
2569         unsigned long flags;
2570
2571         if (il->iw_mode == NL80211_IFTYPE_ADHOC)
2572                 start = IL_STA_ID;
2573
2574         if (is_broadcast_ether_addr(addr))
2575                 return il->hw_params.bcast_id;
2576
2577         spin_lock_irqsave(&il->sta_lock, flags);
2578         for (i = start; i < il->hw_params.max_stations; i++)
2579                 if (il->stations[i].used &&
2580                     ether_addr_equal(il->stations[i].sta.sta.addr, addr)) {
2581                         ret = i;
2582                         goto out;
2583                 }
2584
2585         D_ASSOC("can not find STA %pM total %d\n", addr, il->num_stations);
2586
2587 out:
2588         /*
2589          * It may be possible that more commands interacting with stations
2590          * arrive before we completed processing the adding of
2591          * station
2592          */
2593         if (ret != IL_INVALID_STATION &&
2594             (!(il->stations[ret].used & IL_STA_UCODE_ACTIVE) ||
2595               (il->stations[ret].used & IL_STA_UCODE_INPROGRESS))) {
2596                 IL_ERR("Requested station info for sta %d before ready.\n",
2597                        ret);
2598                 ret = IL_INVALID_STATION;
2599         }
2600         spin_unlock_irqrestore(&il->sta_lock, flags);
2601         return ret;
2602 }
2603
2604 static int
2605 il4965_get_ra_sta_id(struct il_priv *il, struct ieee80211_hdr *hdr)
2606 {
2607         if (il->iw_mode == NL80211_IFTYPE_STATION)
2608                 return IL_AP_ID;
2609         else {
2610                 u8 *da = ieee80211_get_DA(hdr);
2611
2612                 return il4965_find_station(il, da);
2613         }
2614 }
2615
2616 static inline u32
2617 il4965_get_scd_ssn(struct il4965_tx_resp *tx_resp)
2618 {
2619         return le32_to_cpup(&tx_resp->u.status +
2620                             tx_resp->frame_count) & IEEE80211_MAX_SN;
2621 }
2622
2623 static inline u32
2624 il4965_tx_status_to_mac80211(u32 status)
2625 {
2626         status &= TX_STATUS_MSK;
2627
2628         switch (status) {
2629         case TX_STATUS_SUCCESS:
2630         case TX_STATUS_DIRECT_DONE:
2631                 return IEEE80211_TX_STAT_ACK;
2632         case TX_STATUS_FAIL_DEST_PS:
2633                 return IEEE80211_TX_STAT_TX_FILTERED;
2634         default:
2635                 return 0;
2636         }
2637 }
2638
2639 /*
2640  * il4965_tx_status_reply_tx - Handle Tx response for frames in aggregation queue
2641  */
2642 static int
2643 il4965_tx_status_reply_tx(struct il_priv *il, struct il_ht_agg *agg,
2644                           struct il4965_tx_resp *tx_resp, int txq_id,
2645                           u16 start_idx)
2646 {
2647         u16 status;
2648         struct agg_tx_status *frame_status = tx_resp->u.agg_status;
2649         struct ieee80211_tx_info *info = NULL;
2650         struct ieee80211_hdr *hdr = NULL;
2651         u32 rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2652         int i, sh, idx;
2653         u16 seq;
2654         if (agg->wait_for_ba)
2655                 D_TX_REPLY("got tx response w/o block-ack\n");
2656
2657         agg->frame_count = tx_resp->frame_count;
2658         agg->start_idx = start_idx;
2659         agg->rate_n_flags = rate_n_flags;
2660         agg->bitmap = 0;
2661
2662         /* num frames attempted by Tx command */
2663         if (agg->frame_count == 1) {
2664                 /* Only one frame was attempted; no block-ack will arrive */
2665                 status = le16_to_cpu(frame_status[0].status);
2666                 idx = start_idx;
2667
2668                 D_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
2669                            agg->frame_count, agg->start_idx, idx);
2670
2671                 info = IEEE80211_SKB_CB(il->txq[txq_id].skbs[idx]);
2672                 info->status.rates[0].count = tx_resp->failure_frame + 1;
2673                 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
2674                 info->flags |= il4965_tx_status_to_mac80211(status);
2675                 il4965_hwrate_to_tx_control(il, rate_n_flags, info);
2676
2677                 D_TX_REPLY("1 Frame 0x%x failure :%d\n", status & 0xff,
2678                            tx_resp->failure_frame);
2679                 D_TX_REPLY("Rate Info rate_n_flags=%x\n", rate_n_flags);
2680
2681                 agg->wait_for_ba = 0;
2682         } else {
2683                 /* Two or more frames were attempted; expect block-ack */
2684                 u64 bitmap = 0;
2685                 int start = agg->start_idx;
2686                 struct sk_buff *skb;
2687
2688                 /* Construct bit-map of pending frames within Tx win */
2689                 for (i = 0; i < agg->frame_count; i++) {
2690                         u16 sc;
2691                         status = le16_to_cpu(frame_status[i].status);
2692                         seq = le16_to_cpu(frame_status[i].sequence);
2693                         idx = SEQ_TO_IDX(seq);
2694                         txq_id = SEQ_TO_QUEUE(seq);
2695
2696                         if (status &
2697                             (AGG_TX_STATE_FEW_BYTES_MSK |
2698                              AGG_TX_STATE_ABORT_MSK))
2699                                 continue;
2700
2701                         D_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
2702                                    agg->frame_count, txq_id, idx);
2703
2704                         skb = il->txq[txq_id].skbs[idx];
2705                         if (WARN_ON_ONCE(skb == NULL))
2706                                 return -1;
2707                         hdr = (struct ieee80211_hdr *) skb->data;
2708
2709                         sc = le16_to_cpu(hdr->seq_ctrl);
2710                         if (idx != (IEEE80211_SEQ_TO_SN(sc) & 0xff)) {
2711                                 IL_ERR("BUG_ON idx doesn't match seq control"
2712                                        " idx=%d, seq_idx=%d, seq=%d\n", idx,
2713                                        IEEE80211_SEQ_TO_SN(sc), hdr->seq_ctrl);
2714                                 return -1;
2715                         }
2716
2717                         D_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n", i, idx,
2718                                    IEEE80211_SEQ_TO_SN(sc));
2719
2720                         sh = idx - start;
2721                         if (sh > 64) {
2722                                 sh = (start - idx) + 0xff;
2723                                 bitmap = bitmap << sh;
2724                                 sh = 0;
2725                                 start = idx;
2726                         } else if (sh < -64)
2727                                 sh = 0xff - (start - idx);
2728                         else if (sh < 0) {
2729                                 sh = start - idx;
2730                                 start = idx;
2731                                 bitmap = bitmap << sh;
2732                                 sh = 0;
2733                         }
2734                         bitmap |= 1ULL << sh;
2735                         D_TX_REPLY("start=%d bitmap=0x%llx\n", start,
2736                                    (unsigned long long)bitmap);
2737                 }
2738
2739                 agg->bitmap = bitmap;
2740                 agg->start_idx = start;
2741                 D_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
2742                            agg->frame_count, agg->start_idx,
2743                            (unsigned long long)agg->bitmap);
2744
2745                 if (bitmap)
2746                         agg->wait_for_ba = 1;
2747         }
2748         return 0;
2749 }
2750
2751 /*
2752  * il4965_hdl_tx - Handle standard (non-aggregation) Tx response
2753  */
2754 static void
2755 il4965_hdl_tx(struct il_priv *il, struct il_rx_buf *rxb)
2756 {
2757         struct il_rx_pkt *pkt = rxb_addr(rxb);
2758         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
2759         int txq_id = SEQ_TO_QUEUE(sequence);
2760         int idx = SEQ_TO_IDX(sequence);
2761         struct il_tx_queue *txq = &il->txq[txq_id];
2762         struct sk_buff *skb;
2763         struct ieee80211_hdr *hdr;
2764         struct ieee80211_tx_info *info;
2765         struct il4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
2766         u32 status = le32_to_cpu(tx_resp->u.status);
2767         int tid;
2768         int sta_id;
2769         int freed;
2770         u8 *qc = NULL;
2771         unsigned long flags;
2772
2773         if (idx >= txq->q.n_bd || il_queue_used(&txq->q, idx) == 0) {
2774                 IL_ERR("Read idx for DMA queue txq_id (%d) idx %d "
2775                        "is out of range [0-%d] %d %d\n", txq_id, idx,
2776                        txq->q.n_bd, txq->q.write_ptr, txq->q.read_ptr);
2777                 return;
2778         }
2779
2780         txq->time_stamp = jiffies;
2781
2782         skb = txq->skbs[txq->q.read_ptr];
2783         info = IEEE80211_SKB_CB(skb);
2784         memset(&info->status, 0, sizeof(info->status));
2785
2786         hdr = (struct ieee80211_hdr *) skb->data;
2787         if (ieee80211_is_data_qos(hdr->frame_control)) {
2788                 qc = ieee80211_get_qos_ctl(hdr);
2789                 tid = qc[0] & 0xf;
2790         }
2791
2792         sta_id = il4965_get_ra_sta_id(il, hdr);
2793         if (txq->sched_retry && unlikely(sta_id == IL_INVALID_STATION)) {
2794                 IL_ERR("Station not known\n");
2795                 return;
2796         }
2797
2798         /*
2799          * Firmware will not transmit frame on passive channel, if it not yet
2800          * received some valid frame on that channel. When this error happen
2801          * we have to wait until firmware will unblock itself i.e. when we
2802          * note received beacon or other frame. We unblock queues in
2803          * il4965_pass_packet_to_mac80211 or in il_mac_bss_info_changed.
2804          */
2805         if (unlikely((status & TX_STATUS_MSK) == TX_STATUS_FAIL_PASSIVE_NO_RX) &&
2806             il->iw_mode == NL80211_IFTYPE_STATION) {
2807                 il_stop_queues_by_reason(il, IL_STOP_REASON_PASSIVE);
2808                 D_INFO("Stopped queues - RX waiting on passive channel\n");
2809         }
2810
2811         spin_lock_irqsave(&il->sta_lock, flags);
2812         if (txq->sched_retry) {
2813                 const u32 scd_ssn = il4965_get_scd_ssn(tx_resp);
2814                 struct il_ht_agg *agg;
2815
2816                 if (WARN_ON(!qc))
2817                         goto out;
2818
2819                 agg = &il->stations[sta_id].tid[tid].agg;
2820
2821                 il4965_tx_status_reply_tx(il, agg, tx_resp, txq_id, idx);
2822
2823                 /* check if BAR is needed */
2824                 if (tx_resp->frame_count == 1 &&
2825                     !il4965_is_tx_success(status))
2826                         info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
2827
2828                 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
2829                         idx = il_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
2830                         D_TX_REPLY("Retry scheduler reclaim scd_ssn "
2831                                    "%d idx %d\n", scd_ssn, idx);
2832                         freed = il4965_tx_queue_reclaim(il, txq_id, idx);
2833                         il4965_free_tfds_in_queue(il, sta_id, tid, freed);
2834
2835                         if (il->mac80211_registered &&
2836                             il_queue_space(&txq->q) > txq->q.low_mark &&
2837                             agg->state != IL_EMPTYING_HW_QUEUE_DELBA)
2838                                 il_wake_queue(il, txq);
2839                 }
2840         } else {
2841                 info->status.rates[0].count = tx_resp->failure_frame + 1;
2842                 info->flags |= il4965_tx_status_to_mac80211(status);
2843                 il4965_hwrate_to_tx_control(il,
2844                                             le32_to_cpu(tx_resp->rate_n_flags),
2845                                             info);
2846
2847                 D_TX_REPLY("TXQ %d status %s (0x%08x) "
2848                            "rate_n_flags 0x%x retries %d\n", txq_id,
2849                            il4965_get_tx_fail_reason(status), status,
2850                            le32_to_cpu(tx_resp->rate_n_flags),
2851                            tx_resp->failure_frame);
2852
2853                 freed = il4965_tx_queue_reclaim(il, txq_id, idx);
2854                 if (qc && likely(sta_id != IL_INVALID_STATION))
2855                         il4965_free_tfds_in_queue(il, sta_id, tid, freed);
2856                 else if (sta_id == IL_INVALID_STATION)
2857                         D_TX_REPLY("Station not known\n");
2858
2859                 if (il->mac80211_registered &&
2860                     il_queue_space(&txq->q) > txq->q.low_mark)
2861                         il_wake_queue(il, txq);
2862         }
2863 out:
2864         if (qc && likely(sta_id != IL_INVALID_STATION))
2865                 il4965_txq_check_empty(il, sta_id, tid, txq_id);
2866
2867         il4965_check_abort_status(il, tx_resp->frame_count, status);
2868
2869         spin_unlock_irqrestore(&il->sta_lock, flags);
2870 }
2871
2872 /*
2873  * translate ucode response to mac80211 tx status control values
2874  */
2875 void
2876 il4965_hwrate_to_tx_control(struct il_priv *il, u32 rate_n_flags,
2877                             struct ieee80211_tx_info *info)
2878 {
2879         struct ieee80211_tx_rate *r = &info->status.rates[0];
2880
2881         info->status.antenna =
2882             ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
2883         if (rate_n_flags & RATE_MCS_HT_MSK)
2884                 r->flags |= IEEE80211_TX_RC_MCS;
2885         if (rate_n_flags & RATE_MCS_GF_MSK)
2886                 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
2887         if (rate_n_flags & RATE_MCS_HT40_MSK)
2888                 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
2889         if (rate_n_flags & RATE_MCS_DUP_MSK)
2890                 r->flags |= IEEE80211_TX_RC_DUP_DATA;
2891         if (rate_n_flags & RATE_MCS_SGI_MSK)
2892                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
2893         r->idx = il4965_hwrate_to_mac80211_idx(rate_n_flags, info->band);
2894 }
2895
2896 /*
2897  * il4965_hdl_compressed_ba - Handler for N_COMPRESSED_BA
2898  *
2899  * Handles block-acknowledge notification from device, which reports success
2900  * of frames sent via aggregation.
2901  */
2902 static void
2903 il4965_hdl_compressed_ba(struct il_priv *il, struct il_rx_buf *rxb)
2904 {
2905         struct il_rx_pkt *pkt = rxb_addr(rxb);
2906         struct il_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
2907         struct il_tx_queue *txq = NULL;
2908         struct il_ht_agg *agg;
2909         int idx;
2910         int sta_id;
2911         int tid;
2912         unsigned long flags;
2913
2914         /* "flow" corresponds to Tx queue */
2915         u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
2916
2917         /* "ssn" is start of block-ack Tx win, corresponds to idx
2918          * (in Tx queue's circular buffer) of first TFD/frame in win */
2919         u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
2920
2921         if (scd_flow >= il->hw_params.max_txq_num) {
2922                 IL_ERR("BUG_ON scd_flow is bigger than number of queues\n");
2923                 return;
2924         }
2925
2926         txq = &il->txq[scd_flow];
2927         sta_id = ba_resp->sta_id;
2928         tid = ba_resp->tid;
2929         agg = &il->stations[sta_id].tid[tid].agg;
2930         if (unlikely(agg->txq_id != scd_flow)) {
2931                 /*
2932                  * FIXME: this is a uCode bug which need to be addressed,
2933                  * log the information and return for now!
2934                  * since it is possible happen very often and in order
2935                  * not to fill the syslog, don't enable the logging by default
2936                  */
2937                 D_TX_REPLY("BA scd_flow %d does not match txq_id %d\n",
2938                            scd_flow, agg->txq_id);
2939                 return;
2940         }
2941
2942         /* Find idx just before block-ack win */
2943         idx = il_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd);
2944
2945         spin_lock_irqsave(&il->sta_lock, flags);
2946
2947         D_TX_REPLY("N_COMPRESSED_BA [%d] Received from %pM, " "sta_id = %d\n",
2948                    agg->wait_for_ba, (u8 *) &ba_resp->sta_addr_lo32,
2949                    ba_resp->sta_id);
2950         D_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%llx," "scd_flow = "
2951                    "%d, scd_ssn = %d\n", ba_resp->tid, ba_resp->seq_ctl,
2952                    (unsigned long long)le64_to_cpu(ba_resp->bitmap),
2953                    ba_resp->scd_flow, ba_resp->scd_ssn);
2954         D_TX_REPLY("DAT start_idx = %d, bitmap = 0x%llx\n", agg->start_idx,
2955                    (unsigned long long)agg->bitmap);
2956
2957         /* Update driver's record of ACK vs. not for each frame in win */
2958         il4965_tx_status_reply_compressed_ba(il, agg, ba_resp);
2959
2960         /* Release all TFDs before the SSN, i.e. all TFDs in front of
2961          * block-ack win (we assume that they've been successfully
2962          * transmitted ... if not, it's too late anyway). */
2963         if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff)) {
2964                 /* calculate mac80211 ampdu sw queue to wake */
2965                 int freed = il4965_tx_queue_reclaim(il, scd_flow, idx);
2966                 il4965_free_tfds_in_queue(il, sta_id, tid, freed);
2967
2968                 if (il_queue_space(&txq->q) > txq->q.low_mark &&
2969                     il->mac80211_registered &&
2970                     agg->state != IL_EMPTYING_HW_QUEUE_DELBA)
2971                         il_wake_queue(il, txq);
2972
2973                 il4965_txq_check_empty(il, sta_id, tid, scd_flow);
2974         }
2975
2976         spin_unlock_irqrestore(&il->sta_lock, flags);
2977 }
2978
2979 #ifdef CONFIG_IWLEGACY_DEBUG
2980 const char *
2981 il4965_get_tx_fail_reason(u32 status)
2982 {
2983 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
2984 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
2985
2986         switch (status & TX_STATUS_MSK) {
2987         case TX_STATUS_SUCCESS:
2988                 return "SUCCESS";
2989                 TX_STATUS_POSTPONE(DELAY);
2990                 TX_STATUS_POSTPONE(FEW_BYTES);
2991                 TX_STATUS_POSTPONE(QUIET_PERIOD);
2992                 TX_STATUS_POSTPONE(CALC_TTAK);
2993                 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
2994                 TX_STATUS_FAIL(SHORT_LIMIT);
2995                 TX_STATUS_FAIL(LONG_LIMIT);
2996                 TX_STATUS_FAIL(FIFO_UNDERRUN);
2997                 TX_STATUS_FAIL(DRAIN_FLOW);
2998                 TX_STATUS_FAIL(RFKILL_FLUSH);
2999                 TX_STATUS_FAIL(LIFE_EXPIRE);
3000                 TX_STATUS_FAIL(DEST_PS);
3001                 TX_STATUS_FAIL(HOST_ABORTED);
3002                 TX_STATUS_FAIL(BT_RETRY);
3003                 TX_STATUS_FAIL(STA_INVALID);
3004                 TX_STATUS_FAIL(FRAG_DROPPED);
3005                 TX_STATUS_FAIL(TID_DISABLE);
3006                 TX_STATUS_FAIL(FIFO_FLUSHED);
3007                 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
3008                 TX_STATUS_FAIL(PASSIVE_NO_RX);
3009                 TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
3010         }
3011
3012         return "UNKNOWN";
3013
3014 #undef TX_STATUS_FAIL
3015 #undef TX_STATUS_POSTPONE
3016 }
3017 #endif /* CONFIG_IWLEGACY_DEBUG */
3018
3019 static struct il_link_quality_cmd *
3020 il4965_sta_alloc_lq(struct il_priv *il, u8 sta_id)
3021 {
3022         int i, r;
3023         struct il_link_quality_cmd *link_cmd;
3024         u32 rate_flags = 0;
3025         __le32 rate_n_flags;
3026
3027         link_cmd = kzalloc(sizeof(struct il_link_quality_cmd), GFP_KERNEL);
3028         if (!link_cmd) {
3029                 IL_ERR("Unable to allocate memory for LQ cmd.\n");
3030                 return NULL;
3031         }
3032         /* Set up the rate scaling to start at selected rate, fall back
3033          * all the way down to 1M in IEEE order, and then spin on 1M */
3034         if (il->band == NL80211_BAND_5GHZ)
3035                 r = RATE_6M_IDX;
3036         else
3037                 r = RATE_1M_IDX;
3038
3039         if (r >= IL_FIRST_CCK_RATE && r <= IL_LAST_CCK_RATE)
3040                 rate_flags |= RATE_MCS_CCK_MSK;
3041
3042         rate_flags |=
3043             il4965_first_antenna(il->hw_params.
3044                                  valid_tx_ant) << RATE_MCS_ANT_POS;
3045         rate_n_flags = cpu_to_le32(il_rates[r].plcp | rate_flags);
3046         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
3047                 link_cmd->rs_table[i].rate_n_flags = rate_n_flags;
3048
3049         link_cmd->general_params.single_stream_ant_msk =
3050             il4965_first_antenna(il->hw_params.valid_tx_ant);
3051
3052         link_cmd->general_params.dual_stream_ant_msk =
3053             il->hw_params.valid_tx_ant & ~il4965_first_antenna(il->hw_params.
3054                                                                valid_tx_ant);
3055         if (!link_cmd->general_params.dual_stream_ant_msk) {
3056                 link_cmd->general_params.dual_stream_ant_msk = ANT_AB;
3057         } else if (il4965_num_of_ant(il->hw_params.valid_tx_ant) == 2) {
3058                 link_cmd->general_params.dual_stream_ant_msk =
3059                     il->hw_params.valid_tx_ant;
3060         }
3061
3062         link_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
3063         link_cmd->agg_params.agg_time_limit =
3064             cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
3065
3066         link_cmd->sta_id = sta_id;
3067
3068         return link_cmd;
3069 }
3070
3071 /*
3072  * il4965_add_bssid_station - Add the special IBSS BSSID station
3073  *
3074  * Function sleeps.
3075  */
3076 int
3077 il4965_add_bssid_station(struct il_priv *il, const u8 *addr, u8 *sta_id_r)
3078 {
3079         int ret;
3080         u8 sta_id;
3081         struct il_link_quality_cmd *link_cmd;
3082         unsigned long flags;
3083
3084         if (sta_id_r)
3085                 *sta_id_r = IL_INVALID_STATION;
3086
3087         ret = il_add_station_common(il, addr, 0, NULL, &sta_id);
3088         if (ret) {
3089                 IL_ERR("Unable to add station %pM\n", addr);
3090                 return ret;
3091         }
3092
3093         if (sta_id_r)
3094                 *sta_id_r = sta_id;
3095
3096         spin_lock_irqsave(&il->sta_lock, flags);
3097         il->stations[sta_id].used |= IL_STA_LOCAL;
3098         spin_unlock_irqrestore(&il->sta_lock, flags);
3099
3100         /* Set up default rate scaling table in device's station table */
3101         link_cmd = il4965_sta_alloc_lq(il, sta_id);
3102         if (!link_cmd) {
3103                 IL_ERR("Unable to initialize rate scaling for station %pM.\n",
3104                        addr);
3105                 return -ENOMEM;
3106         }
3107
3108         ret = il_send_lq_cmd(il, link_cmd, CMD_SYNC, true);
3109         if (ret)
3110                 IL_ERR("Link quality command failed (%d)\n", ret);
3111
3112         spin_lock_irqsave(&il->sta_lock, flags);
3113         il->stations[sta_id].lq = link_cmd;
3114         spin_unlock_irqrestore(&il->sta_lock, flags);
3115
3116         return 0;
3117 }
3118
3119 static int
3120 il4965_static_wepkey_cmd(struct il_priv *il, bool send_if_empty)
3121 {
3122         int i;
3123         u8 buff[sizeof(struct il_wep_cmd) +
3124                 sizeof(struct il_wep_key) * WEP_KEYS_MAX];
3125         struct il_wep_cmd *wep_cmd = (struct il_wep_cmd *)buff;
3126         size_t cmd_size = sizeof(struct il_wep_cmd);
3127         struct il_host_cmd cmd = {
3128                 .id = C_WEPKEY,
3129                 .data = wep_cmd,
3130                 .flags = CMD_SYNC,
3131         };
3132         bool not_empty = false;
3133
3134         might_sleep();
3135
3136         memset(wep_cmd, 0,
3137                cmd_size + (sizeof(struct il_wep_key) * WEP_KEYS_MAX));
3138
3139         for (i = 0; i < WEP_KEYS_MAX; i++) {
3140                 u8 key_size = il->_4965.wep_keys[i].key_size;
3141
3142                 wep_cmd->key[i].key_idx = i;
3143                 if (key_size) {
3144                         wep_cmd->key[i].key_offset = i;
3145                         not_empty = true;
3146                 } else
3147                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
3148
3149                 wep_cmd->key[i].key_size = key_size;
3150                 memcpy(&wep_cmd->key[i].key[3], il->_4965.wep_keys[i].key, key_size);
3151         }
3152
3153         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
3154         wep_cmd->num_keys = WEP_KEYS_MAX;
3155
3156         cmd_size += sizeof(struct il_wep_key) * WEP_KEYS_MAX;
3157         cmd.len = cmd_size;
3158
3159         if (not_empty || send_if_empty)
3160                 return il_send_cmd(il, &cmd);
3161         else
3162                 return 0;
3163 }
3164
3165 int
3166 il4965_restore_default_wep_keys(struct il_priv *il)
3167 {
3168         lockdep_assert_held(&il->mutex);
3169
3170         return il4965_static_wepkey_cmd(il, false);
3171 }
3172
3173 int
3174 il4965_remove_default_wep_key(struct il_priv *il,
3175                               struct ieee80211_key_conf *keyconf)
3176 {
3177         int ret;
3178         int idx = keyconf->keyidx;
3179
3180         lockdep_assert_held(&il->mutex);
3181
3182         D_WEP("Removing default WEP key: idx=%d\n", idx);
3183
3184         memset(&il->_4965.wep_keys[idx], 0, sizeof(struct il_wep_key));
3185         if (il_is_rfkill(il)) {
3186                 D_WEP("Not sending C_WEPKEY command due to RFKILL.\n");
3187                 /* but keys in device are clear anyway so return success */
3188                 return 0;
3189         }
3190         ret = il4965_static_wepkey_cmd(il, 1);
3191         D_WEP("Remove default WEP key: idx=%d ret=%d\n", idx, ret);
3192
3193         return ret;
3194 }
3195
3196 int
3197 il4965_set_default_wep_key(struct il_priv *il,
3198                            struct ieee80211_key_conf *keyconf)
3199 {
3200         int ret;
3201         int len = keyconf->keylen;
3202         int idx = keyconf->keyidx;
3203
3204         lockdep_assert_held(&il->mutex);
3205
3206         if (len != WEP_KEY_LEN_128 && len != WEP_KEY_LEN_64) {
3207                 D_WEP("Bad WEP key length %d\n", keyconf->keylen);
3208                 return -EINVAL;
3209         }
3210
3211         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
3212         keyconf->hw_key_idx = HW_KEY_DEFAULT;
3213         il->stations[IL_AP_ID].keyinfo.cipher = keyconf->cipher;
3214
3215         il->_4965.wep_keys[idx].key_size = len;
3216         memcpy(&il->_4965.wep_keys[idx].key, &keyconf->key, len);
3217
3218         ret = il4965_static_wepkey_cmd(il, false);
3219
3220         D_WEP("Set default WEP key: len=%d idx=%d ret=%d\n", len, idx, ret);
3221         return ret;
3222 }
3223
3224 static int
3225 il4965_set_wep_dynamic_key_info(struct il_priv *il,
3226                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
3227 {
3228         unsigned long flags;
3229         __le16 key_flags = 0;
3230         struct il_addsta_cmd sta_cmd;
3231
3232         lockdep_assert_held(&il->mutex);
3233
3234         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
3235
3236         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
3237         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
3238         key_flags &= ~STA_KEY_FLG_INVALID;
3239
3240         if (keyconf->keylen == WEP_KEY_LEN_128)
3241                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
3242
3243         if (sta_id == il->hw_params.bcast_id)
3244                 key_flags |= STA_KEY_MULTICAST_MSK;
3245
3246         spin_lock_irqsave(&il->sta_lock, flags);
3247
3248         il->stations[sta_id].keyinfo.cipher = keyconf->cipher;
3249         il->stations[sta_id].keyinfo.keylen = keyconf->keylen;
3250         il->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
3251
3252         memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, keyconf->keylen);
3253
3254         memcpy(&il->stations[sta_id].sta.key.key[3], keyconf->key,
3255                keyconf->keylen);
3256
3257         if ((il->stations[sta_id].sta.key.
3258              key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC)
3259                 il->stations[sta_id].sta.key.key_offset =
3260                     il_get_free_ucode_key_idx(il);
3261         /* else, we are overriding an existing key => no need to allocated room
3262          * in uCode. */
3263
3264         WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
3265              "no space for a new key");
3266
3267         il->stations[sta_id].sta.key.key_flags = key_flags;
3268         il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
3269         il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3270
3271         memcpy(&sta_cmd, &il->stations[sta_id].sta,
3272                sizeof(struct il_addsta_cmd));
3273         spin_unlock_irqrestore(&il->sta_lock, flags);
3274
3275         return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
3276 }
3277
3278 static int
3279 il4965_set_ccmp_dynamic_key_info(struct il_priv *il,
3280                                  struct ieee80211_key_conf *keyconf, u8 sta_id)
3281 {
3282         unsigned long flags;
3283         __le16 key_flags = 0;
3284         struct il_addsta_cmd sta_cmd;
3285
3286         lockdep_assert_held(&il->mutex);
3287
3288         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
3289         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
3290         key_flags &= ~STA_KEY_FLG_INVALID;
3291
3292         if (sta_id == il->hw_params.bcast_id)
3293                 key_flags |= STA_KEY_MULTICAST_MSK;
3294
3295         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
3296
3297         spin_lock_irqsave(&il->sta_lock, flags);
3298         il->stations[sta_id].keyinfo.cipher = keyconf->cipher;
3299         il->stations[sta_id].keyinfo.keylen = keyconf->keylen;
3300
3301         memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, keyconf->keylen);
3302
3303         memcpy(il->stations[sta_id].sta.key.key, keyconf->key, keyconf->keylen);
3304
3305         if ((il->stations[sta_id].sta.key.
3306              key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC)
3307                 il->stations[sta_id].sta.key.key_offset =
3308                     il_get_free_ucode_key_idx(il);
3309         /* else, we are overriding an existing key => no need to allocated room
3310          * in uCode. */
3311
3312         WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
3313              "no space for a new key");
3314
3315         il->stations[sta_id].sta.key.key_flags = key_flags;
3316         il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
3317         il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3318
3319         memcpy(&sta_cmd, &il->stations[sta_id].sta,
3320                sizeof(struct il_addsta_cmd));
3321         spin_unlock_irqrestore(&il->sta_lock, flags);
3322
3323         return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
3324 }
3325
3326 static int
3327 il4965_set_tkip_dynamic_key_info(struct il_priv *il,
3328                                  struct ieee80211_key_conf *keyconf, u8 sta_id)
3329 {
3330         unsigned long flags;
3331         __le16 key_flags = 0;
3332
3333         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
3334         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
3335         key_flags &= ~STA_KEY_FLG_INVALID;
3336
3337         if (sta_id == il->hw_params.bcast_id)
3338                 key_flags |= STA_KEY_MULTICAST_MSK;
3339
3340         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
3341         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
3342
3343         spin_lock_irqsave(&il->sta_lock, flags);
3344
3345         il->stations[sta_id].keyinfo.cipher = keyconf->cipher;
3346         il->stations[sta_id].keyinfo.keylen = 16;
3347
3348         if ((il->stations[sta_id].sta.key.
3349              key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC)
3350                 il->stations[sta_id].sta.key.key_offset =
3351                     il_get_free_ucode_key_idx(il);
3352         /* else, we are overriding an existing key => no need to allocated room
3353          * in uCode. */
3354
3355         WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
3356              "no space for a new key");
3357
3358         il->stations[sta_id].sta.key.key_flags = key_flags;
3359
3360         /* This copy is acutally not needed: we get the key with each TX */
3361         memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, 16);
3362
3363         memcpy(il->stations[sta_id].sta.key.key, keyconf->key, 16);
3364
3365         spin_unlock_irqrestore(&il->sta_lock, flags);
3366
3367         return 0;
3368 }
3369
3370 void
3371 il4965_update_tkip_key(struct il_priv *il, struct ieee80211_key_conf *keyconf,
3372                        struct ieee80211_sta *sta, u32 iv32, u16 *phase1key)
3373 {
3374         u8 sta_id;
3375         unsigned long flags;
3376         int i;
3377
3378         if (il_scan_cancel(il)) {
3379                 /* cancel scan failed, just live w/ bad key and rely
3380                    briefly on SW decryption */
3381                 return;
3382         }
3383
3384         sta_id = il_sta_id_or_broadcast(il, sta);
3385         if (sta_id == IL_INVALID_STATION)
3386                 return;
3387
3388         spin_lock_irqsave(&il->sta_lock, flags);
3389
3390         il->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
3391
3392         for (i = 0; i < 5; i++)
3393                 il->stations[sta_id].sta.key.tkip_rx_ttak[i] =
3394                     cpu_to_le16(phase1key[i]);
3395
3396         il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
3397         il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3398
3399         il_send_add_sta(il, &il->stations[sta_id].sta, CMD_ASYNC);
3400
3401         spin_unlock_irqrestore(&il->sta_lock, flags);
3402 }
3403
3404 int
3405 il4965_remove_dynamic_key(struct il_priv *il,
3406                           struct ieee80211_key_conf *keyconf, u8 sta_id)
3407 {
3408         unsigned long flags;
3409         u16 key_flags;
3410         u8 keyidx;
3411         struct il_addsta_cmd sta_cmd;
3412
3413         lockdep_assert_held(&il->mutex);
3414
3415         il->_4965.key_mapping_keys--;
3416
3417         spin_lock_irqsave(&il->sta_lock, flags);
3418         key_flags = le16_to_cpu(il->stations[sta_id].sta.key.key_flags);
3419         keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
3420
3421         D_WEP("Remove dynamic key: idx=%d sta=%d\n", keyconf->keyidx, sta_id);
3422
3423         if (keyconf->keyidx != keyidx) {
3424                 /* We need to remove a key with idx different that the one
3425                  * in the uCode. This means that the key we need to remove has
3426                  * been replaced by another one with different idx.
3427                  * Don't do anything and return ok
3428                  */
3429                 spin_unlock_irqrestore(&il->sta_lock, flags);
3430                 return 0;
3431         }
3432
3433         if (il->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_INVALID) {
3434                 IL_WARN("Removing wrong key %d 0x%x\n", keyconf->keyidx,
3435                         key_flags);
3436                 spin_unlock_irqrestore(&il->sta_lock, flags);
3437                 return 0;
3438         }
3439
3440         if (!test_and_clear_bit
3441             (il->stations[sta_id].sta.key.key_offset, &il->ucode_key_table))
3442                 IL_ERR("idx %d not used in uCode key table.\n",
3443                        il->stations[sta_id].sta.key.key_offset);
3444         memset(&il->stations[sta_id].keyinfo, 0, sizeof(struct il_hw_key));
3445         memset(&il->stations[sta_id].sta.key, 0, sizeof(struct il4965_keyinfo));
3446         il->stations[sta_id].sta.key.key_flags =
3447             STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
3448         il->stations[sta_id].sta.key.key_offset = keyconf->hw_key_idx;
3449         il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
3450         il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3451
3452         if (il_is_rfkill(il)) {
3453                 D_WEP
3454                     ("Not sending C_ADD_STA command because RFKILL enabled.\n");
3455                 spin_unlock_irqrestore(&il->sta_lock, flags);
3456                 return 0;
3457         }
3458         memcpy(&sta_cmd, &il->stations[sta_id].sta,
3459                sizeof(struct il_addsta_cmd));
3460         spin_unlock_irqrestore(&il->sta_lock, flags);
3461
3462         return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
3463 }
3464
3465 int
3466 il4965_set_dynamic_key(struct il_priv *il, struct ieee80211_key_conf *keyconf,
3467                        u8 sta_id)
3468 {
3469         int ret;
3470
3471         lockdep_assert_held(&il->mutex);
3472
3473         il->_4965.key_mapping_keys++;
3474         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
3475
3476         switch (keyconf->cipher) {
3477         case WLAN_CIPHER_SUITE_CCMP:
3478                 ret =
3479                     il4965_set_ccmp_dynamic_key_info(il, keyconf, sta_id);
3480                 break;
3481         case WLAN_CIPHER_SUITE_TKIP:
3482                 ret =
3483                     il4965_set_tkip_dynamic_key_info(il, keyconf, sta_id);
3484                 break;
3485         case WLAN_CIPHER_SUITE_WEP40:
3486         case WLAN_CIPHER_SUITE_WEP104:
3487                 ret = il4965_set_wep_dynamic_key_info(il, keyconf, sta_id);
3488                 break;
3489         default:
3490                 IL_ERR("Unknown alg: %s cipher = %x\n", __func__,
3491                        keyconf->cipher);
3492                 ret = -EINVAL;
3493         }
3494
3495         D_WEP("Set dynamic key: cipher=%x len=%d idx=%d sta=%d ret=%d\n",
3496               keyconf->cipher, keyconf->keylen, keyconf->keyidx, sta_id, ret);
3497
3498         return ret;
3499 }
3500
3501 /*
3502  * il4965_alloc_bcast_station - add broadcast station into driver's station table.
3503  *
3504  * This adds the broadcast station into the driver's station table
3505  * and marks it driver active, so that it will be restored to the
3506  * device at the next best time.
3507  */
3508 int
3509 il4965_alloc_bcast_station(struct il_priv *il)
3510 {
3511         struct il_link_quality_cmd *link_cmd;
3512         unsigned long flags;
3513         u8 sta_id;
3514
3515         spin_lock_irqsave(&il->sta_lock, flags);
3516         sta_id = il_prep_station(il, il_bcast_addr, false, NULL);
3517         if (sta_id == IL_INVALID_STATION) {
3518                 IL_ERR("Unable to prepare broadcast station\n");
3519                 spin_unlock_irqrestore(&il->sta_lock, flags);
3520
3521                 return -EINVAL;
3522         }
3523
3524         il->stations[sta_id].used |= IL_STA_DRIVER_ACTIVE;
3525         il->stations[sta_id].used |= IL_STA_BCAST;
3526         spin_unlock_irqrestore(&il->sta_lock, flags);
3527
3528         link_cmd = il4965_sta_alloc_lq(il, sta_id);
3529         if (!link_cmd) {
3530                 IL_ERR
3531                     ("Unable to initialize rate scaling for bcast station.\n");
3532                 return -ENOMEM;
3533         }
3534
3535         spin_lock_irqsave(&il->sta_lock, flags);
3536         il->stations[sta_id].lq = link_cmd;
3537         spin_unlock_irqrestore(&il->sta_lock, flags);
3538
3539         return 0;
3540 }
3541
3542 /*
3543  * il4965_update_bcast_station - update broadcast station's LQ command
3544  *
3545  * Only used by iwl4965. Placed here to have all bcast station management
3546  * code together.
3547  */
3548 static int
3549 il4965_update_bcast_station(struct il_priv *il)
3550 {
3551         unsigned long flags;
3552         struct il_link_quality_cmd *link_cmd;
3553         u8 sta_id = il->hw_params.bcast_id;
3554
3555         link_cmd = il4965_sta_alloc_lq(il, sta_id);
3556         if (!link_cmd) {
3557                 IL_ERR("Unable to initialize rate scaling for bcast sta.\n");
3558                 return -ENOMEM;
3559         }
3560
3561         spin_lock_irqsave(&il->sta_lock, flags);
3562         if (il->stations[sta_id].lq)
3563                 kfree(il->stations[sta_id].lq);
3564         else
3565                 D_INFO("Bcast sta rate scaling has not been initialized.\n");
3566         il->stations[sta_id].lq = link_cmd;
3567         spin_unlock_irqrestore(&il->sta_lock, flags);
3568
3569         return 0;
3570 }
3571
3572 int
3573 il4965_update_bcast_stations(struct il_priv *il)
3574 {
3575         return il4965_update_bcast_station(il);
3576 }
3577
3578 /*
3579  * il4965_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
3580  */
3581 int
3582 il4965_sta_tx_modify_enable_tid(struct il_priv *il, int sta_id, int tid)
3583 {
3584         unsigned long flags;
3585         struct il_addsta_cmd sta_cmd;
3586
3587         lockdep_assert_held(&il->mutex);
3588
3589         /* Remove "disable" flag, to enable Tx for this TID */
3590         spin_lock_irqsave(&il->sta_lock, flags);
3591         il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
3592         il->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
3593         il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3594         memcpy(&sta_cmd, &il->stations[sta_id].sta,
3595                sizeof(struct il_addsta_cmd));
3596         spin_unlock_irqrestore(&il->sta_lock, flags);
3597
3598         return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
3599 }
3600
3601 int
3602 il4965_sta_rx_agg_start(struct il_priv *il, struct ieee80211_sta *sta, int tid,
3603                         u16 ssn)
3604 {
3605         unsigned long flags;
3606         int sta_id;
3607         struct il_addsta_cmd sta_cmd;
3608
3609         lockdep_assert_held(&il->mutex);
3610
3611         sta_id = il_sta_id(sta);
3612         if (sta_id == IL_INVALID_STATION)
3613                 return -ENXIO;
3614
3615         spin_lock_irqsave(&il->sta_lock, flags);
3616         il->stations[sta_id].sta.station_flags_msk = 0;
3617         il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
3618         il->stations[sta_id].sta.add_immediate_ba_tid = (u8) tid;
3619         il->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
3620         il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3621         memcpy(&sta_cmd, &il->stations[sta_id].sta,
3622                sizeof(struct il_addsta_cmd));
3623         spin_unlock_irqrestore(&il->sta_lock, flags);
3624
3625         return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
3626 }
3627
3628 int
3629 il4965_sta_rx_agg_stop(struct il_priv *il, struct ieee80211_sta *sta, int tid)
3630 {
3631         unsigned long flags;
3632         int sta_id;
3633         struct il_addsta_cmd sta_cmd;
3634
3635         lockdep_assert_held(&il->mutex);
3636
3637         sta_id = il_sta_id(sta);
3638         if (sta_id == IL_INVALID_STATION) {
3639                 IL_ERR("Invalid station for AGG tid %d\n", tid);
3640                 return -ENXIO;
3641         }
3642
3643         spin_lock_irqsave(&il->sta_lock, flags);
3644         il->stations[sta_id].sta.station_flags_msk = 0;
3645         il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
3646         il->stations[sta_id].sta.remove_immediate_ba_tid = (u8) tid;
3647         il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3648         memcpy(&sta_cmd, &il->stations[sta_id].sta,
3649                sizeof(struct il_addsta_cmd));
3650         spin_unlock_irqrestore(&il->sta_lock, flags);
3651
3652         return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
3653 }
3654
3655 void
3656 il4965_sta_modify_sleep_tx_count(struct il_priv *il, int sta_id, int cnt)
3657 {
3658         unsigned long flags;
3659
3660         spin_lock_irqsave(&il->sta_lock, flags);
3661         il->stations[sta_id].sta.station_flags |= STA_FLG_PWR_SAVE_MSK;
3662         il->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
3663         il->stations[sta_id].sta.sta.modify_mask =
3664             STA_MODIFY_SLEEP_TX_COUNT_MSK;
3665         il->stations[sta_id].sta.sleep_tx_count = cpu_to_le16(cnt);
3666         il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3667         il_send_add_sta(il, &il->stations[sta_id].sta, CMD_ASYNC);
3668         spin_unlock_irqrestore(&il->sta_lock, flags);
3669
3670 }
3671
3672 void
3673 il4965_update_chain_flags(struct il_priv *il)
3674 {
3675         if (il->ops->set_rxon_chain) {
3676                 il->ops->set_rxon_chain(il);
3677                 if (il->active.rx_chain != il->staging.rx_chain)
3678                         il_commit_rxon(il);
3679         }
3680 }
3681
3682 static void
3683 il4965_clear_free_frames(struct il_priv *il)
3684 {
3685         struct list_head *element;
3686
3687         D_INFO("%d frames on pre-allocated heap on clear.\n", il->frames_count);
3688
3689         while (!list_empty(&il->free_frames)) {
3690                 element = il->free_frames.next;
3691                 list_del(element);
3692                 kfree(list_entry(element, struct il_frame, list));
3693                 il->frames_count--;
3694         }
3695
3696         if (il->frames_count) {
3697                 IL_WARN("%d frames still in use.  Did we lose one?\n",
3698                         il->frames_count);
3699                 il->frames_count = 0;
3700         }
3701 }
3702
3703 static struct il_frame *
3704 il4965_get_free_frame(struct il_priv *il)
3705 {
3706         struct il_frame *frame;
3707         struct list_head *element;
3708         if (list_empty(&il->free_frames)) {
3709                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
3710                 if (!frame) {
3711                         IL_ERR("Could not allocate frame!\n");
3712                         return NULL;
3713                 }
3714
3715                 il->frames_count++;
3716                 return frame;
3717         }
3718
3719         element = il->free_frames.next;
3720         list_del(element);
3721         return list_entry(element, struct il_frame, list);
3722 }
3723
3724 static void
3725 il4965_free_frame(struct il_priv *il, struct il_frame *frame)
3726 {
3727         memset(frame, 0, sizeof(*frame));
3728         list_add(&frame->list, &il->free_frames);
3729 }
3730
3731 static u32
3732 il4965_fill_beacon_frame(struct il_priv *il, struct ieee80211_hdr *hdr,
3733                          int left)
3734 {
3735         lockdep_assert_held(&il->mutex);
3736
3737         if (!il->beacon_skb)
3738                 return 0;
3739
3740         if (il->beacon_skb->len > left)
3741                 return 0;
3742
3743         memcpy(hdr, il->beacon_skb->data, il->beacon_skb->len);
3744
3745         return il->beacon_skb->len;
3746 }
3747
3748 /* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */
3749 static void
3750 il4965_set_beacon_tim(struct il_priv *il,
3751                       struct il_tx_beacon_cmd *tx_beacon_cmd, u8 * beacon,
3752                       u32 frame_size)
3753 {
3754         u16 tim_idx;
3755         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
3756
3757         /*
3758          * The idx is relative to frame start but we start looking at the
3759          * variable-length part of the beacon.
3760          */
3761         tim_idx = mgmt->u.beacon.variable - beacon;
3762
3763         /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
3764         while ((tim_idx < (frame_size - 2)) &&
3765                (beacon[tim_idx] != WLAN_EID_TIM))
3766                 tim_idx += beacon[tim_idx + 1] + 2;
3767
3768         /* If TIM field was found, set variables */
3769         if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
3770                 tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx);
3771                 tx_beacon_cmd->tim_size = beacon[tim_idx + 1];
3772         } else
3773                 IL_WARN("Unable to find TIM Element in beacon\n");
3774 }
3775
3776 static unsigned int
3777 il4965_hw_get_beacon_cmd(struct il_priv *il, struct il_frame *frame)
3778 {
3779         struct il_tx_beacon_cmd *tx_beacon_cmd;
3780         u32 frame_size;
3781         u32 rate_flags;
3782         u32 rate;
3783         /*
3784          * We have to set up the TX command, the TX Beacon command, and the
3785          * beacon contents.
3786          */
3787
3788         lockdep_assert_held(&il->mutex);
3789
3790         if (!il->beacon_enabled) {
3791                 IL_ERR("Trying to build beacon without beaconing enabled\n");
3792                 return 0;
3793         }
3794
3795         /* Initialize memory */
3796         tx_beacon_cmd = &frame->u.beacon;
3797         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
3798
3799         /* Set up TX beacon contents */
3800         frame_size =
3801             il4965_fill_beacon_frame(il, tx_beacon_cmd->frame,
3802                                      sizeof(frame->u) - sizeof(*tx_beacon_cmd));
3803         if (WARN_ON_ONCE(frame_size > MAX_MPDU_SIZE))
3804                 return 0;
3805         if (!frame_size)
3806                 return 0;
3807
3808         /* Set up TX command fields */
3809         tx_beacon_cmd->tx.len = cpu_to_le16((u16) frame_size);
3810         tx_beacon_cmd->tx.sta_id = il->hw_params.bcast_id;
3811         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
3812         tx_beacon_cmd->tx.tx_flags =
3813             TX_CMD_FLG_SEQ_CTL_MSK | TX_CMD_FLG_TSF_MSK |
3814             TX_CMD_FLG_STA_RATE_MSK;
3815
3816         /* Set up TX beacon command fields */
3817         il4965_set_beacon_tim(il, tx_beacon_cmd, (u8 *) tx_beacon_cmd->frame,
3818                               frame_size);
3819
3820         /* Set up packet rate and flags */
3821         rate = il_get_lowest_plcp(il);
3822         il4965_toggle_tx_ant(il, &il->mgmt_tx_ant, il->hw_params.valid_tx_ant);
3823         rate_flags = BIT(il->mgmt_tx_ant) << RATE_MCS_ANT_POS;
3824         if ((rate >= IL_FIRST_CCK_RATE) && (rate <= IL_LAST_CCK_RATE))
3825                 rate_flags |= RATE_MCS_CCK_MSK;
3826         tx_beacon_cmd->tx.rate_n_flags = cpu_to_le32(rate | rate_flags);
3827
3828         return sizeof(*tx_beacon_cmd) + frame_size;
3829 }
3830
3831 int
3832 il4965_send_beacon_cmd(struct il_priv *il)
3833 {
3834         struct il_frame *frame;
3835         unsigned int frame_size;
3836         int rc;
3837
3838         frame = il4965_get_free_frame(il);
3839         if (!frame) {
3840                 IL_ERR("Could not obtain free frame buffer for beacon "
3841                        "command.\n");
3842                 return -ENOMEM;
3843         }
3844
3845         frame_size = il4965_hw_get_beacon_cmd(il, frame);
3846         if (!frame_size) {
3847                 IL_ERR("Error configuring the beacon command\n");
3848                 il4965_free_frame(il, frame);
3849                 return -EINVAL;
3850         }
3851
3852         rc = il_send_cmd_pdu(il, C_TX_BEACON, frame_size, &frame->u.cmd[0]);
3853
3854         il4965_free_frame(il, frame);
3855
3856         return rc;
3857 }
3858
3859 static inline dma_addr_t
3860 il4965_tfd_tb_get_addr(struct il_tfd *tfd, u8 idx)
3861 {
3862         struct il_tfd_tb *tb = &tfd->tbs[idx];
3863
3864         dma_addr_t addr = get_unaligned_le32(&tb->lo);
3865         if (sizeof(dma_addr_t) > sizeof(u32))
3866                 addr |=
3867                     ((dma_addr_t) (le16_to_cpu(tb->hi_n_len) & 0xF) << 16) <<
3868                     16;
3869
3870         return addr;
3871 }
3872
3873 static inline u16
3874 il4965_tfd_tb_get_len(struct il_tfd *tfd, u8 idx)
3875 {
3876         struct il_tfd_tb *tb = &tfd->tbs[idx];
3877
3878         return le16_to_cpu(tb->hi_n_len) >> 4;
3879 }
3880
3881 static inline void
3882 il4965_tfd_set_tb(struct il_tfd *tfd, u8 idx, dma_addr_t addr, u16 len)
3883 {
3884         struct il_tfd_tb *tb = &tfd->tbs[idx];
3885         u16 hi_n_len = len << 4;
3886
3887         put_unaligned_le32(addr, &tb->lo);
3888         if (sizeof(dma_addr_t) > sizeof(u32))
3889                 hi_n_len |= ((addr >> 16) >> 16) & 0xF;
3890
3891         tb->hi_n_len = cpu_to_le16(hi_n_len);
3892
3893         tfd->num_tbs = idx + 1;
3894 }
3895
3896 static inline u8
3897 il4965_tfd_get_num_tbs(struct il_tfd *tfd)
3898 {
3899         return tfd->num_tbs & 0x1f;
3900 }
3901
3902 /*
3903  * il4965_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
3904  *
3905  * Does NOT advance any TFD circular buffer read/write idxes
3906  * Does NOT free the TFD itself (which is within circular buffer)
3907  */
3908 void
3909 il4965_hw_txq_free_tfd(struct il_priv *il, struct il_tx_queue *txq)
3910 {
3911         struct il_tfd *tfd_tmp = (struct il_tfd *)txq->tfds;
3912         struct il_tfd *tfd;
3913         struct pci_dev *dev = il->pci_dev;
3914         int idx = txq->q.read_ptr;
3915         int i;
3916         int num_tbs;
3917
3918         tfd = &tfd_tmp[idx];
3919
3920         /* Sanity check on number of chunks */
3921         num_tbs = il4965_tfd_get_num_tbs(tfd);
3922
3923         if (num_tbs >= IL_NUM_OF_TBS) {
3924                 IL_ERR("Too many chunks: %i\n", num_tbs);
3925                 /* @todo issue fatal error, it is quite serious situation */
3926                 return;
3927         }
3928
3929         /* Unmap tx_cmd */
3930         if (num_tbs)
3931                 dma_unmap_single(&dev->dev,
3932                                  dma_unmap_addr(&txq->meta[idx], mapping),
3933                                  dma_unmap_len(&txq->meta[idx], len),
3934                                  DMA_BIDIRECTIONAL);
3935
3936         /* Unmap chunks, if any. */
3937         for (i = 1; i < num_tbs; i++)
3938                 dma_unmap_single(&dev->dev, il4965_tfd_tb_get_addr(tfd, i),
3939                                  il4965_tfd_tb_get_len(tfd, i), DMA_TO_DEVICE);
3940
3941         /* free SKB */
3942         if (txq->skbs) {
3943                 struct sk_buff *skb = txq->skbs[txq->q.read_ptr];
3944
3945                 /* can be called from irqs-disabled context */
3946                 if (skb) {
3947                         dev_kfree_skb_any(skb);
3948                         txq->skbs[txq->q.read_ptr] = NULL;
3949                 }
3950         }
3951 }
3952
3953 int
3954 il4965_hw_txq_attach_buf_to_tfd(struct il_priv *il, struct il_tx_queue *txq,
3955                                 dma_addr_t addr, u16 len, u8 reset, u8 pad)
3956 {
3957         struct il_queue *q;
3958         struct il_tfd *tfd, *tfd_tmp;
3959         u32 num_tbs;
3960
3961         q = &txq->q;
3962         tfd_tmp = (struct il_tfd *)txq->tfds;
3963         tfd = &tfd_tmp[q->write_ptr];
3964
3965         if (reset)
3966                 memset(tfd, 0, sizeof(*tfd));
3967
3968         num_tbs = il4965_tfd_get_num_tbs(tfd);
3969
3970         /* Each TFD can point to a maximum 20 Tx buffers */
3971         if (num_tbs >= IL_NUM_OF_TBS) {
3972                 IL_ERR("Error can not send more than %d chunks\n",
3973                        IL_NUM_OF_TBS);
3974                 return -EINVAL;
3975         }
3976
3977         BUG_ON(addr & ~DMA_BIT_MASK(36));
3978         if (unlikely(addr & ~IL_TX_DMA_MASK))
3979                 IL_ERR("Unaligned address = %llx\n", (unsigned long long)addr);
3980
3981         il4965_tfd_set_tb(tfd, num_tbs, addr, len);
3982
3983         return 0;
3984 }
3985
3986 /*
3987  * Tell nic where to find circular buffer of Tx Frame Descriptors for
3988  * given Tx queue, and enable the DMA channel used for that queue.
3989  *
3990  * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
3991  * channels supported in hardware.
3992  */
3993 int
3994 il4965_hw_tx_queue_init(struct il_priv *il, struct il_tx_queue *txq)
3995 {
3996         int txq_id = txq->q.id;
3997
3998         /* Circular buffer (TFD queue in DRAM) physical base address */
3999         il_wr(il, FH49_MEM_CBBC_QUEUE(txq_id), txq->q.dma_addr >> 8);
4000
4001         return 0;
4002 }
4003
4004 /******************************************************************************
4005  *
4006  * Generic RX handler implementations
4007  *
4008  ******************************************************************************/
4009 static void
4010 il4965_hdl_alive(struct il_priv *il, struct il_rx_buf *rxb)
4011 {
4012         struct il_rx_pkt *pkt = rxb_addr(rxb);
4013         struct il_alive_resp *palive;
4014         struct delayed_work *pwork;
4015
4016         palive = &pkt->u.alive_frame;
4017
4018         D_INFO("Alive ucode status 0x%08X revision " "0x%01X 0x%01X\n",
4019                palive->is_valid, palive->ver_type, palive->ver_subtype);
4020
4021         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
4022                 D_INFO("Initialization Alive received.\n");
4023                 memcpy(&il->card_alive_init, &pkt->u.raw,
4024                        sizeof(struct il_init_alive_resp));
4025                 pwork = &il->init_alive_start;
4026         } else {
4027                 D_INFO("Runtime Alive received.\n");
4028                 memcpy(&il->card_alive, &pkt->u.alive_frame,
4029                        sizeof(struct il_alive_resp));
4030                 pwork = &il->alive_start;
4031         }
4032
4033         /* We delay the ALIVE response by 5ms to
4034          * give the HW RF Kill time to activate... */
4035         if (palive->is_valid == UCODE_VALID_OK)
4036                 queue_delayed_work(il->workqueue, pwork, msecs_to_jiffies(5));
4037         else
4038                 IL_WARN("uCode did not respond OK.\n");
4039 }
4040
4041 /*
4042  * il4965_bg_stats_periodic - Timer callback to queue stats
4043  *
4044  * This callback is provided in order to send a stats request.
4045  *
4046  * This timer function is continually reset to execute within
4047  * 60 seconds since the last N_STATS was received.  We need to
4048  * ensure we receive the stats in order to update the temperature
4049  * used for calibrating the TXPOWER.
4050  */
4051 static void
4052 il4965_bg_stats_periodic(struct timer_list *t)
4053 {
4054         struct il_priv *il = from_timer(il, t, stats_periodic);
4055
4056         if (test_bit(S_EXIT_PENDING, &il->status))
4057                 return;
4058
4059         /* dont send host command if rf-kill is on */
4060         if (!il_is_ready_rf(il))
4061                 return;
4062
4063         il_send_stats_request(il, CMD_ASYNC, false);
4064 }
4065
4066 static void
4067 il4965_hdl_beacon(struct il_priv *il, struct il_rx_buf *rxb)
4068 {
4069         struct il_rx_pkt *pkt = rxb_addr(rxb);
4070         struct il4965_beacon_notif *beacon =
4071             (struct il4965_beacon_notif *)pkt->u.raw;
4072 #ifdef CONFIG_IWLEGACY_DEBUG
4073         u8 rate = il4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
4074
4075         D_RX("beacon status %x retries %d iss %d tsf:0x%.8x%.8x rate %d\n",
4076              le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
4077              beacon->beacon_notify_hdr.failure_frame,
4078              le32_to_cpu(beacon->ibss_mgr_status),
4079              le32_to_cpu(beacon->high_tsf), le32_to_cpu(beacon->low_tsf), rate);
4080 #endif
4081         il->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
4082 }
4083
4084 static void
4085 il4965_perform_ct_kill_task(struct il_priv *il)
4086 {
4087         unsigned long flags;
4088
4089         D_POWER("Stop all queues\n");
4090
4091         if (il->mac80211_registered)
4092                 ieee80211_stop_queues(il->hw);
4093
4094         _il_wr(il, CSR_UCODE_DRV_GP1_SET,
4095                CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
4096         _il_rd(il, CSR_UCODE_DRV_GP1);
4097
4098         spin_lock_irqsave(&il->reg_lock, flags);
4099         if (likely(_il_grab_nic_access(il)))
4100                 _il_release_nic_access(il);
4101         spin_unlock_irqrestore(&il->reg_lock, flags);
4102 }
4103
4104 /* Handle notification from uCode that card's power state is changing
4105  * due to software, hardware, or critical temperature RFKILL */
4106 static void
4107 il4965_hdl_card_state(struct il_priv *il, struct il_rx_buf *rxb)
4108 {
4109         struct il_rx_pkt *pkt = rxb_addr(rxb);
4110         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
4111         unsigned long status = il->status;
4112
4113         D_RF_KILL("Card state received: HW:%s SW:%s CT:%s\n",
4114                   (flags & HW_CARD_DISABLED) ? "Kill" : "On",
4115                   (flags & SW_CARD_DISABLED) ? "Kill" : "On",
4116                   (flags & CT_CARD_DISABLED) ? "Reached" : "Not reached");
4117
4118         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED | CT_CARD_DISABLED)) {
4119
4120                 _il_wr(il, CSR_UCODE_DRV_GP1_SET,
4121                        CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4122
4123                 il_wr(il, HBUS_TARG_MBX_C, HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
4124
4125                 if (!(flags & RXON_CARD_DISABLED)) {
4126                         _il_wr(il, CSR_UCODE_DRV_GP1_CLR,
4127                                CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4128                         il_wr(il, HBUS_TARG_MBX_C,
4129                               HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
4130                 }
4131         }
4132
4133         if (flags & CT_CARD_DISABLED)
4134                 il4965_perform_ct_kill_task(il);
4135
4136         if (flags & HW_CARD_DISABLED)
4137                 set_bit(S_RFKILL, &il->status);
4138         else
4139                 clear_bit(S_RFKILL, &il->status);
4140
4141         if (!(flags & RXON_CARD_DISABLED))
4142                 il_scan_cancel(il);
4143
4144         if ((test_bit(S_RFKILL, &status) !=
4145              test_bit(S_RFKILL, &il->status)))
4146                 wiphy_rfkill_set_hw_state(il->hw->wiphy,
4147                                           test_bit(S_RFKILL, &il->status));
4148         else
4149                 wake_up(&il->wait_command_queue);
4150 }
4151
4152 /*
4153  * il4965_setup_handlers - Initialize Rx handler callbacks
4154  *
4155  * Setup the RX handlers for each of the reply types sent from the uCode
4156  * to the host.
4157  *
4158  * This function chains into the hardware specific files for them to setup
4159  * any hardware specific handlers as well.
4160  */
4161 static void
4162 il4965_setup_handlers(struct il_priv *il)
4163 {
4164         il->handlers[N_ALIVE] = il4965_hdl_alive;
4165         il->handlers[N_ERROR] = il_hdl_error;
4166         il->handlers[N_CHANNEL_SWITCH] = il_hdl_csa;
4167         il->handlers[N_SPECTRUM_MEASUREMENT] = il_hdl_spectrum_measurement;
4168         il->handlers[N_PM_SLEEP] = il_hdl_pm_sleep;
4169         il->handlers[N_PM_DEBUG_STATS] = il_hdl_pm_debug_stats;
4170         il->handlers[N_BEACON] = il4965_hdl_beacon;
4171
4172         /*
4173          * The same handler is used for both the REPLY to a discrete
4174          * stats request from the host as well as for the periodic
4175          * stats notifications (after received beacons) from the uCode.
4176          */
4177         il->handlers[C_STATS] = il4965_hdl_c_stats;
4178         il->handlers[N_STATS] = il4965_hdl_stats;
4179
4180         il_setup_rx_scan_handlers(il);
4181
4182         /* status change handler */
4183         il->handlers[N_CARD_STATE] = il4965_hdl_card_state;
4184
4185         il->handlers[N_MISSED_BEACONS] = il4965_hdl_missed_beacon;
4186         /* Rx handlers */
4187         il->handlers[N_RX_PHY] = il4965_hdl_rx_phy;
4188         il->handlers[N_RX_MPDU] = il4965_hdl_rx;
4189         il->handlers[N_RX] = il4965_hdl_rx;
4190         /* block ack */
4191         il->handlers[N_COMPRESSED_BA] = il4965_hdl_compressed_ba;
4192         /* Tx response */
4193         il->handlers[C_TX] = il4965_hdl_tx;
4194 }
4195
4196 /*
4197  * il4965_rx_handle - Main entry function for receiving responses from uCode
4198  *
4199  * Uses the il->handlers callback function array to invoke
4200  * the appropriate handlers, including command responses,
4201  * frame-received notifications, and other notifications.
4202  */
4203 void
4204 il4965_rx_handle(struct il_priv *il)
4205 {
4206         struct il_rx_buf *rxb;
4207         struct il_rx_pkt *pkt;
4208         struct il_rx_queue *rxq = &il->rxq;
4209         u32 r, i;
4210         int reclaim;
4211         unsigned long flags;
4212         u8 fill_rx = 0;
4213         u32 count = 8;
4214         int total_empty;
4215
4216         /* uCode's read idx (stored in shared DRAM) indicates the last Rx
4217          * buffer that the driver may process (last buffer filled by ucode). */
4218         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF;
4219         i = rxq->read;
4220
4221         /* Rx interrupt, but nothing sent from uCode */
4222         if (i == r)
4223                 D_RX("r = %d, i = %d\n", r, i);
4224
4225         /* calculate total frames need to be restock after handling RX */
4226         total_empty = r - rxq->write_actual;
4227         if (total_empty < 0)
4228                 total_empty += RX_QUEUE_SIZE;
4229
4230         if (total_empty > (RX_QUEUE_SIZE / 2))
4231                 fill_rx = 1;
4232
4233         while (i != r) {
4234                 rxb = rxq->queue[i];
4235
4236                 /* If an RXB doesn't have a Rx queue slot associated with it,
4237                  * then a bug has been introduced in the queue refilling
4238                  * routines -- catch it here */
4239                 BUG_ON(rxb == NULL);
4240
4241                 rxq->queue[i] = NULL;
4242
4243                 dma_unmap_page(&il->pci_dev->dev, rxb->page_dma,
4244                                PAGE_SIZE << il->hw_params.rx_page_order,
4245                                DMA_FROM_DEVICE);
4246                 pkt = rxb_addr(rxb);
4247                 reclaim = il_need_reclaim(il, pkt);
4248
4249                 /* Based on type of command response or notification,
4250                  *   handle those that need handling via function in
4251                  *   handlers table.  See il4965_setup_handlers() */
4252                 if (il->handlers[pkt->hdr.cmd]) {
4253                         D_RX("r = %d, i = %d, %s, 0x%02x\n", r, i,
4254                              il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4255                         il->isr_stats.handlers[pkt->hdr.cmd]++;
4256                         il->handlers[pkt->hdr.cmd] (il, rxb);
4257                 } else {
4258                         /* No handling needed */
4259                         D_RX("r %d i %d No handler needed for %s, 0x%02x\n", r,
4260                              i, il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4261                 }
4262
4263                 /*
4264                  * XXX: After here, we should always check rxb->page
4265                  * against NULL before touching it or its virtual
4266                  * memory (pkt). Because some handler might have
4267                  * already taken or freed the pages.
4268                  */
4269
4270                 if (reclaim) {
4271                         /* Invoke any callbacks, transfer the buffer to caller,
4272                          * and fire off the (possibly) blocking il_send_cmd()
4273                          * as we reclaim the driver command queue */
4274                         if (rxb->page)
4275                                 il_tx_cmd_complete(il, rxb);
4276                         else
4277                                 IL_WARN("Claim null rxb?\n");
4278                 }
4279
4280                 /* Reuse the page if possible. For notification packets and
4281                  * SKBs that fail to Rx correctly, add them back into the
4282                  * rx_free list for reuse later. */
4283                 spin_lock_irqsave(&rxq->lock, flags);
4284                 if (rxb->page != NULL) {
4285                         rxb->page_dma =
4286                             dma_map_page(&il->pci_dev->dev, rxb->page, 0,
4287                                          PAGE_SIZE << il->hw_params.rx_page_order,
4288                                          DMA_FROM_DEVICE);
4289
4290                         if (unlikely(dma_mapping_error(&il->pci_dev->dev,
4291                                                        rxb->page_dma))) {
4292                                 __il_free_pages(il, rxb->page);
4293                                 rxb->page = NULL;
4294                                 list_add_tail(&rxb->list, &rxq->rx_used);
4295                         } else {
4296                                 list_add_tail(&rxb->list, &rxq->rx_free);
4297                                 rxq->free_count++;
4298                         }
4299                 } else
4300                         list_add_tail(&rxb->list, &rxq->rx_used);
4301
4302                 spin_unlock_irqrestore(&rxq->lock, flags);
4303
4304                 i = (i + 1) & RX_QUEUE_MASK;
4305                 /* If there are a lot of unused frames,
4306                  * restock the Rx queue so ucode wont assert. */
4307                 if (fill_rx) {
4308                         count++;
4309                         if (count >= 8) {
4310                                 rxq->read = i;
4311                                 il4965_rx_replenish_now(il);
4312                                 count = 0;
4313                         }
4314                 }
4315         }
4316
4317         /* Backtrack one entry */
4318         rxq->read = i;
4319         if (fill_rx)
4320                 il4965_rx_replenish_now(il);
4321         else
4322                 il4965_rx_queue_restock(il);
4323 }
4324
4325 /* call this function to flush any scheduled tasklet */
4326 static inline void
4327 il4965_synchronize_irq(struct il_priv *il)
4328 {
4329         /* wait to make sure we flush pending tasklet */
4330         synchronize_irq(il->pci_dev->irq);
4331         tasklet_kill(&il->irq_tasklet);
4332 }
4333
4334 static void
4335 il4965_irq_tasklet(struct tasklet_struct *t)
4336 {
4337         struct il_priv *il = from_tasklet(il, t, irq_tasklet);
4338         u32 inta, handled = 0;
4339         u32 inta_fh;
4340         unsigned long flags;
4341         u32 i;
4342 #ifdef CONFIG_IWLEGACY_DEBUG
4343         u32 inta_mask;
4344 #endif
4345
4346         spin_lock_irqsave(&il->lock, flags);
4347
4348         /* Ack/clear/reset pending uCode interrupts.
4349          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4350          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
4351         inta = _il_rd(il, CSR_INT);
4352         _il_wr(il, CSR_INT, inta);
4353
4354         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4355          * Any new interrupts that happen after this, either while we're
4356          * in this tasklet, or later, will show up in next ISR/tasklet. */
4357         inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
4358         _il_wr(il, CSR_FH_INT_STATUS, inta_fh);
4359
4360 #ifdef CONFIG_IWLEGACY_DEBUG
4361         if (il_get_debug_level(il) & IL_DL_ISR) {
4362                 /* just for debug */
4363                 inta_mask = _il_rd(il, CSR_INT_MASK);
4364                 D_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta,
4365                       inta_mask, inta_fh);
4366         }
4367 #endif
4368
4369         spin_unlock_irqrestore(&il->lock, flags);
4370
4371         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4372          * atomic, make sure that inta covers all the interrupts that
4373          * we've discovered, even if FH interrupt came in just after
4374          * reading CSR_INT. */
4375         if (inta_fh & CSR49_FH_INT_RX_MASK)
4376                 inta |= CSR_INT_BIT_FH_RX;
4377         if (inta_fh & CSR49_FH_INT_TX_MASK)
4378                 inta |= CSR_INT_BIT_FH_TX;
4379
4380         /* Now service all interrupt bits discovered above. */
4381         if (inta & CSR_INT_BIT_HW_ERR) {
4382                 IL_ERR("Hardware error detected.  Restarting.\n");
4383
4384                 /* Tell the device to stop sending interrupts */
4385                 il_disable_interrupts(il);
4386
4387                 il->isr_stats.hw++;
4388                 il_irq_handle_error(il);
4389
4390                 handled |= CSR_INT_BIT_HW_ERR;
4391
4392                 return;
4393         }
4394 #ifdef CONFIG_IWLEGACY_DEBUG
4395         if (il_get_debug_level(il) & (IL_DL_ISR)) {
4396                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4397                 if (inta & CSR_INT_BIT_SCD) {
4398                         D_ISR("Scheduler finished to transmit "
4399                               "the frame/frames.\n");
4400                         il->isr_stats.sch++;
4401                 }
4402
4403                 /* Alive notification via Rx interrupt will do the real work */
4404                 if (inta & CSR_INT_BIT_ALIVE) {
4405                         D_ISR("Alive interrupt\n");
4406                         il->isr_stats.alive++;
4407                 }
4408         }
4409 #endif
4410         /* Safely ignore these bits for debug checks below */
4411         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
4412
4413         /* HW RF KILL switch toggled */
4414         if (inta & CSR_INT_BIT_RF_KILL) {
4415                 int hw_rf_kill = 0;
4416
4417                 if (!(_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4418                         hw_rf_kill = 1;
4419
4420                 IL_WARN("RF_KILL bit toggled to %s.\n",
4421                         hw_rf_kill ? "disable radio" : "enable radio");
4422
4423                 il->isr_stats.rfkill++;
4424
4425                 /* driver only loads ucode once setting the interface up.
4426                  * the driver allows loading the ucode even if the radio
4427                  * is killed. Hence update the killswitch state here. The
4428                  * rfkill handler will care about restarting if needed.
4429                  */
4430                 if (hw_rf_kill) {
4431                         set_bit(S_RFKILL, &il->status);
4432                 } else {
4433                         clear_bit(S_RFKILL, &il->status);
4434                         il_force_reset(il, true);
4435                 }
4436                 wiphy_rfkill_set_hw_state(il->hw->wiphy, hw_rf_kill);
4437
4438                 handled |= CSR_INT_BIT_RF_KILL;
4439         }
4440
4441         /* Chip got too hot and stopped itself */
4442         if (inta & CSR_INT_BIT_CT_KILL) {
4443                 IL_ERR("Microcode CT kill error detected.\n");
4444                 il->isr_stats.ctkill++;
4445                 handled |= CSR_INT_BIT_CT_KILL;
4446         }
4447
4448         /* Error detected by uCode */
4449         if (inta & CSR_INT_BIT_SW_ERR) {
4450                 IL_ERR("Microcode SW error detected. " " Restarting 0x%X.\n",
4451                        inta);
4452                 il->isr_stats.sw++;
4453                 il_irq_handle_error(il);
4454                 handled |= CSR_INT_BIT_SW_ERR;
4455         }
4456
4457         /*
4458          * uCode wakes up after power-down sleep.
4459          * Tell device about any new tx or host commands enqueued,
4460          * and about any Rx buffers made available while asleep.
4461          */
4462         if (inta & CSR_INT_BIT_WAKEUP) {
4463                 D_ISR("Wakeup interrupt\n");
4464                 il_rx_queue_update_write_ptr(il, &il->rxq);
4465                 for (i = 0; i < il->hw_params.max_txq_num; i++)
4466                         il_txq_update_write_ptr(il, &il->txq[i]);
4467                 il->isr_stats.wakeup++;
4468                 handled |= CSR_INT_BIT_WAKEUP;
4469         }
4470
4471         /* All uCode command responses, including Tx command responses,
4472          * Rx "responses" (frame-received notification), and other
4473          * notifications from uCode come through here*/
4474         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4475                 il4965_rx_handle(il);
4476                 il->isr_stats.rx++;
4477                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4478         }
4479
4480         /* This "Tx" DMA channel is used only for loading uCode */
4481         if (inta & CSR_INT_BIT_FH_TX) {
4482                 D_ISR("uCode load interrupt\n");
4483                 il->isr_stats.tx++;
4484                 handled |= CSR_INT_BIT_FH_TX;
4485                 /* Wake up uCode load routine, now that load is complete */
4486                 il->ucode_write_complete = 1;
4487                 wake_up(&il->wait_command_queue);
4488         }
4489
4490         if (inta & ~handled) {
4491                 IL_ERR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4492                 il->isr_stats.unhandled++;
4493         }
4494
4495         if (inta & ~(il->inta_mask)) {
4496                 IL_WARN("Disabled INTA bits 0x%08x were pending\n",
4497                         inta & ~il->inta_mask);
4498                 IL_WARN("   with FH49_INT = 0x%08x\n", inta_fh);
4499         }
4500
4501         /* Re-enable all interrupts */
4502         /* only Re-enable if disabled by irq */
4503         if (test_bit(S_INT_ENABLED, &il->status))
4504                 il_enable_interrupts(il);
4505         /* Re-enable RF_KILL if it occurred */
4506         else if (handled & CSR_INT_BIT_RF_KILL)
4507                 il_enable_rfkill_int(il);
4508
4509 #ifdef CONFIG_IWLEGACY_DEBUG
4510         if (il_get_debug_level(il) & (IL_DL_ISR)) {
4511                 inta = _il_rd(il, CSR_INT);
4512                 inta_mask = _il_rd(il, CSR_INT_MASK);
4513                 inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
4514                 D_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4515                       "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4516         }
4517 #endif
4518 }
4519
4520 /*****************************************************************************
4521  *
4522  * sysfs attributes
4523  *
4524  *****************************************************************************/
4525
4526 #ifdef CONFIG_IWLEGACY_DEBUG
4527
4528 /*
4529  * The following adds a new attribute to the sysfs representation
4530  * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
4531  * used for controlling the debug level.
4532  *
4533  * See the level definitions in iwl for details.
4534  *
4535  * The debug_level being managed using sysfs below is a per device debug
4536  * level that is used instead of the global debug level if it (the per
4537  * device debug level) is set.
4538  */
4539 static ssize_t
4540 il4965_show_debug_level(struct device *d, struct device_attribute *attr,
4541                         char *buf)
4542 {
4543         struct il_priv *il = dev_get_drvdata(d);
4544         return sprintf(buf, "0x%08X\n", il_get_debug_level(il));
4545 }
4546
4547 static ssize_t
4548 il4965_store_debug_level(struct device *d, struct device_attribute *attr,
4549                          const char *buf, size_t count)
4550 {
4551         struct il_priv *il = dev_get_drvdata(d);
4552         unsigned long val;
4553         int ret;
4554
4555         ret = kstrtoul(buf, 0, &val);
4556         if (ret)
4557                 IL_ERR("%s is not in hex or decimal form.\n", buf);
4558         else
4559                 il->debug_level = val;
4560
4561         return strnlen(buf, count);
4562 }
4563
4564 static DEVICE_ATTR(debug_level, 0644, il4965_show_debug_level,
4565                    il4965_store_debug_level);
4566
4567 #endif /* CONFIG_IWLEGACY_DEBUG */
4568
4569 static ssize_t
4570 il4965_show_temperature(struct device *d, struct device_attribute *attr,
4571                         char *buf)
4572 {
4573         struct il_priv *il = dev_get_drvdata(d);
4574
4575         if (!il_is_alive(il))
4576                 return -EAGAIN;
4577
4578         return sprintf(buf, "%d\n", il->temperature);
4579 }
4580
4581 static DEVICE_ATTR(temperature, 0444, il4965_show_temperature, NULL);
4582
4583 static ssize_t
4584 il4965_show_tx_power(struct device *d, struct device_attribute *attr, char *buf)
4585 {
4586         struct il_priv *il = dev_get_drvdata(d);
4587
4588         if (!il_is_ready_rf(il))
4589                 return sprintf(buf, "off\n");
4590         else
4591                 return sprintf(buf, "%d\n", il->tx_power_user_lmt);
4592 }
4593
4594 static ssize_t
4595 il4965_store_tx_power(struct device *d, struct device_attribute *attr,
4596                       const char *buf, size_t count)
4597 {
4598         struct il_priv *il = dev_get_drvdata(d);
4599         unsigned long val;
4600         int ret;
4601
4602         ret = kstrtoul(buf, 10, &val);
4603         if (ret)
4604                 IL_INFO("%s is not in decimal form.\n", buf);
4605         else {
4606                 ret = il_set_tx_power(il, val, false);
4607                 if (ret)
4608                         IL_ERR("failed setting tx power (0x%08x).\n", ret);
4609                 else
4610                         ret = count;
4611         }
4612         return ret;
4613 }
4614
4615 static DEVICE_ATTR(tx_power, 0644, il4965_show_tx_power,
4616                    il4965_store_tx_power);
4617
4618 static struct attribute *il_sysfs_entries[] = {
4619         &dev_attr_temperature.attr,
4620         &dev_attr_tx_power.attr,
4621 #ifdef CONFIG_IWLEGACY_DEBUG
4622         &dev_attr_debug_level.attr,
4623 #endif
4624         NULL
4625 };
4626
4627 static const struct attribute_group il_attribute_group = {
4628         .name = NULL,           /* put in device directory */
4629         .attrs = il_sysfs_entries,
4630 };
4631
4632 /******************************************************************************
4633  *
4634  * uCode download functions
4635  *
4636  ******************************************************************************/
4637
4638 static void
4639 il4965_dealloc_ucode_pci(struct il_priv *il)
4640 {
4641         il_free_fw_desc(il->pci_dev, &il->ucode_code);
4642         il_free_fw_desc(il->pci_dev, &il->ucode_data);
4643         il_free_fw_desc(il->pci_dev, &il->ucode_data_backup);
4644         il_free_fw_desc(il->pci_dev, &il->ucode_init);
4645         il_free_fw_desc(il->pci_dev, &il->ucode_init_data);
4646         il_free_fw_desc(il->pci_dev, &il->ucode_boot);
4647 }
4648
4649 static void
4650 il4965_nic_start(struct il_priv *il)
4651 {
4652         /* Remove all resets to allow NIC to operate */
4653         _il_wr(il, CSR_RESET, 0);
4654 }
4655
4656 static void il4965_ucode_callback(const struct firmware *ucode_raw,
4657                                   void *context);
4658 static int il4965_mac_setup_register(struct il_priv *il, u32 max_probe_length);
4659
4660 static int __must_check
4661 il4965_request_firmware(struct il_priv *il, bool first)
4662 {
4663         const char *name_pre = il->cfg->fw_name_pre;
4664         char tag[8];
4665
4666         if (first) {
4667                 il->fw_idx = il->cfg->ucode_api_max;
4668                 sprintf(tag, "%d", il->fw_idx);
4669         } else {
4670                 il->fw_idx--;
4671                 sprintf(tag, "%d", il->fw_idx);
4672         }
4673
4674         if (il->fw_idx < il->cfg->ucode_api_min) {
4675                 IL_ERR("no suitable firmware found!\n");
4676                 return -ENOENT;
4677         }
4678
4679         sprintf(il->firmware_name, "%s%s%s", name_pre, tag, ".ucode");
4680
4681         D_INFO("attempting to load firmware '%s'\n", il->firmware_name);
4682
4683         return request_firmware_nowait(THIS_MODULE, 1, il->firmware_name,
4684                                        &il->pci_dev->dev, GFP_KERNEL, il,
4685                                        il4965_ucode_callback);
4686 }
4687
4688 struct il4965_firmware_pieces {
4689         const void *inst, *data, *init, *init_data, *boot;
4690         size_t inst_size, data_size, init_size, init_data_size, boot_size;
4691 };
4692
4693 static int
4694 il4965_load_firmware(struct il_priv *il, const struct firmware *ucode_raw,
4695                      struct il4965_firmware_pieces *pieces)
4696 {
4697         struct il_ucode_header *ucode = (void *)ucode_raw->data;
4698         u32 api_ver, hdr_size;
4699         const u8 *src;
4700
4701         il->ucode_ver = le32_to_cpu(ucode->ver);
4702         api_ver = IL_UCODE_API(il->ucode_ver);
4703
4704         switch (api_ver) {
4705         default:
4706         case 0:
4707         case 1:
4708         case 2:
4709                 hdr_size = 24;
4710                 if (ucode_raw->size < hdr_size) {
4711                         IL_ERR("File size too small!\n");
4712                         return -EINVAL;
4713                 }
4714                 pieces->inst_size = le32_to_cpu(ucode->v1.inst_size);
4715                 pieces->data_size = le32_to_cpu(ucode->v1.data_size);
4716                 pieces->init_size = le32_to_cpu(ucode->v1.init_size);
4717                 pieces->init_data_size = le32_to_cpu(ucode->v1.init_data_size);
4718                 pieces->boot_size = le32_to_cpu(ucode->v1.boot_size);
4719                 src = ucode->v1.data;
4720                 break;
4721         }
4722
4723         /* Verify size of file vs. image size info in file's header */
4724         if (ucode_raw->size !=
4725             hdr_size + pieces->inst_size + pieces->data_size +
4726             pieces->init_size + pieces->init_data_size + pieces->boot_size) {
4727
4728                 IL_ERR("uCode file size %d does not match expected size\n",
4729                        (int)ucode_raw->size);
4730                 return -EINVAL;
4731         }
4732
4733         pieces->inst = src;
4734         src += pieces->inst_size;
4735         pieces->data = src;
4736         src += pieces->data_size;
4737         pieces->init = src;
4738         src += pieces->init_size;
4739         pieces->init_data = src;
4740         src += pieces->init_data_size;
4741         pieces->boot = src;
4742         src += pieces->boot_size;
4743
4744         return 0;
4745 }
4746
4747 /*
4748  * il4965_ucode_callback - callback when firmware was loaded
4749  *
4750  * If loaded successfully, copies the firmware into buffers
4751  * for the card to fetch (via DMA).
4752  */
4753 static void
4754 il4965_ucode_callback(const struct firmware *ucode_raw, void *context)
4755 {
4756         struct il_priv *il = context;
4757         int err;
4758         struct il4965_firmware_pieces pieces;
4759         const unsigned int api_max = il->cfg->ucode_api_max;
4760         const unsigned int api_min = il->cfg->ucode_api_min;
4761         u32 api_ver;
4762
4763         u32 max_probe_length = 200;
4764         u32 standard_phy_calibration_size =
4765             IL_DEFAULT_STANDARD_PHY_CALIBRATE_TBL_SIZE;
4766
4767         memset(&pieces, 0, sizeof(pieces));
4768
4769         if (!ucode_raw) {
4770                 if (il->fw_idx <= il->cfg->ucode_api_max)
4771                         IL_ERR("request for firmware file '%s' failed.\n",
4772                                il->firmware_name);
4773                 goto try_again;
4774         }
4775
4776         D_INFO("Loaded firmware file '%s' (%zd bytes).\n", il->firmware_name,
4777                ucode_raw->size);
4778
4779         /* Make sure that we got at least the API version number */
4780         if (ucode_raw->size < 4) {
4781                 IL_ERR("File size way too small!\n");
4782                 goto try_again;
4783         }
4784
4785         /* Data from ucode file:  header followed by uCode images */
4786         err = il4965_load_firmware(il, ucode_raw, &pieces);
4787
4788         if (err)
4789                 goto try_again;
4790
4791         api_ver = IL_UCODE_API(il->ucode_ver);
4792
4793         /*
4794          * api_ver should match the api version forming part of the
4795          * firmware filename ... but we don't check for that and only rely
4796          * on the API version read from firmware header from here on forward
4797          */
4798         if (api_ver < api_min || api_ver > api_max) {
4799                 IL_ERR("Driver unable to support your firmware API. "
4800                        "Driver supports v%u, firmware is v%u.\n", api_max,
4801                        api_ver);
4802                 goto try_again;
4803         }
4804
4805         if (api_ver != api_max)
4806                 IL_ERR("Firmware has old API version. Expected v%u, "
4807                        "got v%u. New firmware can be obtained "
4808                        "from http://www.intellinuxwireless.org.\n", api_max,
4809                        api_ver);
4810
4811         IL_INFO("loaded firmware version %u.%u.%u.%u\n",
4812                 IL_UCODE_MAJOR(il->ucode_ver), IL_UCODE_MINOR(il->ucode_ver),
4813                 IL_UCODE_API(il->ucode_ver), IL_UCODE_SERIAL(il->ucode_ver));
4814
4815         snprintf(il->hw->wiphy->fw_version, sizeof(il->hw->wiphy->fw_version),
4816                  "%u.%u.%u.%u", IL_UCODE_MAJOR(il->ucode_ver),
4817                  IL_UCODE_MINOR(il->ucode_ver), IL_UCODE_API(il->ucode_ver),
4818                  IL_UCODE_SERIAL(il->ucode_ver));
4819
4820         /*
4821          * For any of the failures below (before allocating pci memory)
4822          * we will try to load a version with a smaller API -- maybe the
4823          * user just got a corrupted version of the latest API.
4824          */
4825
4826         D_INFO("f/w package hdr ucode version raw = 0x%x\n", il->ucode_ver);
4827         D_INFO("f/w package hdr runtime inst size = %zd\n", pieces.inst_size);
4828         D_INFO("f/w package hdr runtime data size = %zd\n", pieces.data_size);
4829         D_INFO("f/w package hdr init inst size = %zd\n", pieces.init_size);
4830         D_INFO("f/w package hdr init data size = %zd\n", pieces.init_data_size);
4831         D_INFO("f/w package hdr boot inst size = %zd\n", pieces.boot_size);
4832
4833         /* Verify that uCode images will fit in card's SRAM */
4834         if (pieces.inst_size > il->hw_params.max_inst_size) {
4835                 IL_ERR("uCode instr len %zd too large to fit in\n",
4836                        pieces.inst_size);
4837                 goto try_again;
4838         }
4839
4840         if (pieces.data_size > il->hw_params.max_data_size) {
4841                 IL_ERR("uCode data len %zd too large to fit in\n",
4842                        pieces.data_size);
4843                 goto try_again;
4844         }
4845
4846         if (pieces.init_size > il->hw_params.max_inst_size) {
4847                 IL_ERR("uCode init instr len %zd too large to fit in\n",
4848                        pieces.init_size);
4849                 goto try_again;
4850         }
4851
4852         if (pieces.init_data_size > il->hw_params.max_data_size) {
4853                 IL_ERR("uCode init data len %zd too large to fit in\n",
4854                        pieces.init_data_size);
4855                 goto try_again;
4856         }
4857
4858         if (pieces.boot_size > il->hw_params.max_bsm_size) {
4859                 IL_ERR("uCode boot instr len %zd too large to fit in\n",
4860                        pieces.boot_size);
4861                 goto try_again;
4862         }
4863
4864         /* Allocate ucode buffers for card's bus-master loading ... */
4865
4866         /* Runtime instructions and 2 copies of data:
4867          * 1) unmodified from disk
4868          * 2) backup cache for save/restore during power-downs */
4869         il->ucode_code.len = pieces.inst_size;
4870         il_alloc_fw_desc(il->pci_dev, &il->ucode_code);
4871
4872         il->ucode_data.len = pieces.data_size;
4873         il_alloc_fw_desc(il->pci_dev, &il->ucode_data);
4874
4875         il->ucode_data_backup.len = pieces.data_size;
4876         il_alloc_fw_desc(il->pci_dev, &il->ucode_data_backup);
4877
4878         if (!il->ucode_code.v_addr || !il->ucode_data.v_addr ||
4879             !il->ucode_data_backup.v_addr)
4880                 goto err_pci_alloc;
4881
4882         /* Initialization instructions and data */
4883         if (pieces.init_size && pieces.init_data_size) {
4884                 il->ucode_init.len = pieces.init_size;
4885                 il_alloc_fw_desc(il->pci_dev, &il->ucode_init);
4886
4887                 il->ucode_init_data.len = pieces.init_data_size;
4888                 il_alloc_fw_desc(il->pci_dev, &il->ucode_init_data);
4889
4890                 if (!il->ucode_init.v_addr || !il->ucode_init_data.v_addr)
4891                         goto err_pci_alloc;
4892         }
4893
4894         /* Bootstrap (instructions only, no data) */
4895         if (pieces.boot_size) {
4896                 il->ucode_boot.len = pieces.boot_size;
4897                 il_alloc_fw_desc(il->pci_dev, &il->ucode_boot);
4898
4899                 if (!il->ucode_boot.v_addr)
4900                         goto err_pci_alloc;
4901         }
4902
4903         /* Now that we can no longer fail, copy information */
4904
4905         il->sta_key_max_num = STA_KEY_MAX_NUM;
4906
4907         /* Copy images into buffers for card's bus-master reads ... */
4908
4909         /* Runtime instructions (first block of data in file) */
4910         D_INFO("Copying (but not loading) uCode instr len %zd\n",
4911                pieces.inst_size);
4912         memcpy(il->ucode_code.v_addr, pieces.inst, pieces.inst_size);
4913
4914         D_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
4915                il->ucode_code.v_addr, (u32) il->ucode_code.p_addr);
4916
4917         /*
4918          * Runtime data
4919          * NOTE:  Copy into backup buffer will be done in il_up()
4920          */
4921         D_INFO("Copying (but not loading) uCode data len %zd\n",
4922                pieces.data_size);
4923         memcpy(il->ucode_data.v_addr, pieces.data, pieces.data_size);
4924         memcpy(il->ucode_data_backup.v_addr, pieces.data, pieces.data_size);
4925
4926         /* Initialization instructions */
4927         if (pieces.init_size) {
4928                 D_INFO("Copying (but not loading) init instr len %zd\n",
4929                        pieces.init_size);
4930                 memcpy(il->ucode_init.v_addr, pieces.init, pieces.init_size);
4931         }
4932
4933         /* Initialization data */
4934         if (pieces.init_data_size) {
4935                 D_INFO("Copying (but not loading) init data len %zd\n",
4936                        pieces.init_data_size);
4937                 memcpy(il->ucode_init_data.v_addr, pieces.init_data,
4938                        pieces.init_data_size);
4939         }
4940
4941         /* Bootstrap instructions */
4942         D_INFO("Copying (but not loading) boot instr len %zd\n",
4943                pieces.boot_size);
4944         memcpy(il->ucode_boot.v_addr, pieces.boot, pieces.boot_size);
4945
4946         /*
4947          * figure out the offset of chain noise reset and gain commands
4948          * base on the size of standard phy calibration commands table size
4949          */
4950         il->_4965.phy_calib_chain_noise_reset_cmd =
4951             standard_phy_calibration_size;
4952         il->_4965.phy_calib_chain_noise_gain_cmd =
4953             standard_phy_calibration_size + 1;
4954
4955         /**************************************************
4956          * This is still part of probe() in a sense...
4957          *
4958          * 9. Setup and register with mac80211 and debugfs
4959          **************************************************/
4960         err = il4965_mac_setup_register(il, max_probe_length);
4961         if (err)
4962                 goto out_unbind;
4963
4964         il_dbgfs_register(il, DRV_NAME);
4965
4966         err = sysfs_create_group(&il->pci_dev->dev.kobj, &il_attribute_group);
4967         if (err) {
4968                 IL_ERR("failed to create sysfs device attributes\n");
4969                 goto out_unbind;
4970         }
4971
4972         /* We have our copies now, allow OS release its copies */
4973         release_firmware(ucode_raw);
4974         complete(&il->_4965.firmware_loading_complete);
4975         return;
4976
4977 try_again:
4978         /* try next, if any */
4979         if (il4965_request_firmware(il, false))
4980                 goto out_unbind;
4981         release_firmware(ucode_raw);
4982         return;
4983
4984 err_pci_alloc:
4985         IL_ERR("failed to allocate pci memory\n");
4986         il4965_dealloc_ucode_pci(il);
4987 out_unbind:
4988         complete(&il->_4965.firmware_loading_complete);
4989         device_release_driver(&il->pci_dev->dev);
4990         release_firmware(ucode_raw);
4991 }
4992
4993 static const char *const desc_lookup_text[] = {
4994         "OK",
4995         "FAIL",
4996         "BAD_PARAM",
4997         "BAD_CHECKSUM",
4998         "NMI_INTERRUPT_WDG",
4999         "SYSASSERT",
5000         "FATAL_ERROR",
5001         "BAD_COMMAND",
5002         "HW_ERROR_TUNE_LOCK",
5003         "HW_ERROR_TEMPERATURE",
5004         "ILLEGAL_CHAN_FREQ",
5005         "VCC_NOT_STBL",
5006         "FH49_ERROR",
5007         "NMI_INTERRUPT_HOST",
5008         "NMI_INTERRUPT_ACTION_PT",
5009         "NMI_INTERRUPT_UNKNOWN",
5010         "UCODE_VERSION_MISMATCH",
5011         "HW_ERROR_ABS_LOCK",
5012         "HW_ERROR_CAL_LOCK_FAIL",
5013         "NMI_INTERRUPT_INST_ACTION_PT",
5014         "NMI_INTERRUPT_DATA_ACTION_PT",
5015         "NMI_TRM_HW_ER",
5016         "NMI_INTERRUPT_TRM",
5017         "NMI_INTERRUPT_BREAK_POINT",
5018         "DEBUG_0",
5019         "DEBUG_1",
5020         "DEBUG_2",
5021         "DEBUG_3",
5022 };
5023
5024 static struct {
5025         char *name;
5026         u8 num;
5027 } advanced_lookup[] = {
5028         {
5029         "NMI_INTERRUPT_WDG", 0x34}, {
5030         "SYSASSERT", 0x35}, {
5031         "UCODE_VERSION_MISMATCH", 0x37}, {
5032         "BAD_COMMAND", 0x38}, {
5033         "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C}, {
5034         "FATAL_ERROR", 0x3D}, {
5035         "NMI_TRM_HW_ERR", 0x46}, {
5036         "NMI_INTERRUPT_TRM", 0x4C}, {
5037         "NMI_INTERRUPT_BREAK_POINT", 0x54}, {
5038         "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C}, {
5039         "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64}, {
5040         "NMI_INTERRUPT_HOST", 0x66}, {
5041         "NMI_INTERRUPT_ACTION_PT", 0x7C}, {
5042         "NMI_INTERRUPT_UNKNOWN", 0x84}, {
5043         "NMI_INTERRUPT_INST_ACTION_PT", 0x86}, {
5044 "ADVANCED_SYSASSERT", 0},};
5045
5046 static const char *
5047 il4965_desc_lookup(u32 num)
5048 {
5049         int i;
5050         int max = ARRAY_SIZE(desc_lookup_text);
5051
5052         if (num < max)
5053                 return desc_lookup_text[num];
5054
5055         max = ARRAY_SIZE(advanced_lookup) - 1;
5056         for (i = 0; i < max; i++) {
5057                 if (advanced_lookup[i].num == num)
5058                         break;
5059         }
5060         return advanced_lookup[i].name;
5061 }
5062
5063 #define ERROR_START_OFFSET  (1 * sizeof(u32))
5064 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
5065
5066 void
5067 il4965_dump_nic_error_log(struct il_priv *il)
5068 {
5069         u32 data2, line;
5070         u32 desc, time, count, base, data1;
5071         u32 blink1, blink2, ilink1, ilink2;
5072         u32 pc, hcmd;
5073
5074         if (il->ucode_type == UCODE_INIT)
5075                 base = le32_to_cpu(il->card_alive_init.error_event_table_ptr);
5076         else
5077                 base = le32_to_cpu(il->card_alive.error_event_table_ptr);
5078
5079         if (!il->ops->is_valid_rtc_data_addr(base)) {
5080                 IL_ERR("Not valid error log pointer 0x%08X for %s uCode\n",
5081                        base, (il->ucode_type == UCODE_INIT) ? "Init" : "RT");
5082                 return;
5083         }
5084
5085         count = il_read_targ_mem(il, base);
5086
5087         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
5088                 IL_ERR("Start IWL Error Log Dump:\n");
5089                 IL_ERR("Status: 0x%08lX, count: %d\n", il->status, count);
5090         }
5091
5092         desc = il_read_targ_mem(il, base + 1 * sizeof(u32));
5093         il->isr_stats.err_code = desc;
5094         pc = il_read_targ_mem(il, base + 2 * sizeof(u32));
5095         blink1 = il_read_targ_mem(il, base + 3 * sizeof(u32));
5096         blink2 = il_read_targ_mem(il, base + 4 * sizeof(u32));
5097         ilink1 = il_read_targ_mem(il, base + 5 * sizeof(u32));
5098         ilink2 = il_read_targ_mem(il, base + 6 * sizeof(u32));
5099         data1 = il_read_targ_mem(il, base + 7 * sizeof(u32));
5100         data2 = il_read_targ_mem(il, base + 8 * sizeof(u32));
5101         line = il_read_targ_mem(il, base + 9 * sizeof(u32));
5102         time = il_read_targ_mem(il, base + 11 * sizeof(u32));
5103         hcmd = il_read_targ_mem(il, base + 22 * sizeof(u32));
5104
5105         IL_ERR("Desc                                  Time       "
5106                "data1      data2      line\n");
5107         IL_ERR("%-28s (0x%04X) %010u 0x%08X 0x%08X %u\n",
5108                il4965_desc_lookup(desc), desc, time, data1, data2, line);
5109         IL_ERR("pc      blink1  blink2  ilink1  ilink2  hcmd\n");
5110         IL_ERR("0x%05X 0x%05X 0x%05X 0x%05X 0x%05X 0x%05X\n", pc, blink1,
5111                blink2, ilink1, ilink2, hcmd);
5112 }
5113
5114 static void
5115 il4965_rf_kill_ct_config(struct il_priv *il)
5116 {
5117         struct il_ct_kill_config cmd;
5118         unsigned long flags;
5119         int ret = 0;
5120
5121         spin_lock_irqsave(&il->lock, flags);
5122         _il_wr(il, CSR_UCODE_DRV_GP1_CLR,
5123                CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
5124         spin_unlock_irqrestore(&il->lock, flags);
5125
5126         cmd.critical_temperature_R =
5127             cpu_to_le32(il->hw_params.ct_kill_threshold);
5128
5129         ret = il_send_cmd_pdu(il, C_CT_KILL_CONFIG, sizeof(cmd), &cmd);
5130         if (ret)
5131                 IL_ERR("C_CT_KILL_CONFIG failed\n");
5132         else
5133                 D_INFO("C_CT_KILL_CONFIG " "succeeded, "
5134                        "critical temperature is %d\n",
5135                        il->hw_params.ct_kill_threshold);
5136 }
5137
5138 static const s8 default_queue_to_tx_fifo[] = {
5139         IL_TX_FIFO_VO,
5140         IL_TX_FIFO_VI,
5141         IL_TX_FIFO_BE,
5142         IL_TX_FIFO_BK,
5143         IL49_CMD_FIFO_NUM,
5144         IL_TX_FIFO_UNUSED,
5145         IL_TX_FIFO_UNUSED,
5146 };
5147
5148 #define IL_MASK(lo, hi) ((1 << (hi)) | ((1 << (hi)) - (1 << (lo))))
5149
5150 static int
5151 il4965_alive_notify(struct il_priv *il)
5152 {
5153         u32 a;
5154         unsigned long flags;
5155         int i, chan;
5156         u32 reg_val;
5157
5158         spin_lock_irqsave(&il->lock, flags);
5159
5160         /* Clear 4965's internal Tx Scheduler data base */
5161         il->scd_base_addr = il_rd_prph(il, IL49_SCD_SRAM_BASE_ADDR);
5162         a = il->scd_base_addr + IL49_SCD_CONTEXT_DATA_OFFSET;
5163         for (; a < il->scd_base_addr + IL49_SCD_TX_STTS_BITMAP_OFFSET; a += 4)
5164                 il_write_targ_mem(il, a, 0);
5165         for (; a < il->scd_base_addr + IL49_SCD_TRANSLATE_TBL_OFFSET; a += 4)
5166                 il_write_targ_mem(il, a, 0);
5167         for (;
5168              a <
5169              il->scd_base_addr +
5170              IL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(il->hw_params.max_txq_num);
5171              a += 4)
5172                 il_write_targ_mem(il, a, 0);
5173
5174         /* Tel 4965 where to find Tx byte count tables */
5175         il_wr_prph(il, IL49_SCD_DRAM_BASE_ADDR, il->scd_bc_tbls.dma >> 10);
5176
5177         /* Enable DMA channel */
5178         for (chan = 0; chan < FH49_TCSR_CHNL_NUM; chan++)
5179                 il_wr(il, FH49_TCSR_CHNL_TX_CONFIG_REG(chan),
5180                       FH49_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
5181                       FH49_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE);
5182
5183         /* Update FH chicken bits */
5184         reg_val = il_rd(il, FH49_TX_CHICKEN_BITS_REG);
5185         il_wr(il, FH49_TX_CHICKEN_BITS_REG,
5186               reg_val | FH49_TX_CHICKEN_BITS_SCD_AUTO_RETRY_EN);
5187
5188         /* Disable chain mode for all queues */
5189         il_wr_prph(il, IL49_SCD_QUEUECHAIN_SEL, 0);
5190
5191         /* Initialize each Tx queue (including the command queue) */
5192         for (i = 0; i < il->hw_params.max_txq_num; i++) {
5193
5194                 /* TFD circular buffer read/write idxes */
5195                 il_wr_prph(il, IL49_SCD_QUEUE_RDPTR(i), 0);
5196                 il_wr(il, HBUS_TARG_WRPTR, 0 | (i << 8));
5197
5198                 /* Max Tx Window size for Scheduler-ACK mode */
5199                 il_write_targ_mem(il,
5200                                   il->scd_base_addr +
5201                                   IL49_SCD_CONTEXT_QUEUE_OFFSET(i),
5202                                   (SCD_WIN_SIZE <<
5203                                    IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
5204                                   IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
5205
5206                 /* Frame limit */
5207                 il_write_targ_mem(il,
5208                                   il->scd_base_addr +
5209                                   IL49_SCD_CONTEXT_QUEUE_OFFSET(i) +
5210                                   sizeof(u32),
5211                                   (SCD_FRAME_LIMIT <<
5212                                    IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
5213                                   IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
5214
5215         }
5216         il_wr_prph(il, IL49_SCD_INTERRUPT_MASK,
5217                    (1 << il->hw_params.max_txq_num) - 1);
5218
5219         /* Activate all Tx DMA/FIFO channels */
5220         il4965_txq_set_sched(il, IL_MASK(0, 6));
5221
5222         il4965_set_wr_ptrs(il, IL_DEFAULT_CMD_QUEUE_NUM, 0);
5223
5224         /* make sure all queue are not stopped */
5225         memset(&il->queue_stopped[0], 0, sizeof(il->queue_stopped));
5226         for (i = 0; i < 4; i++)
5227                 atomic_set(&il->queue_stop_count[i], 0);
5228
5229         /* reset to 0 to enable all the queue first */
5230         il->txq_ctx_active_msk = 0;
5231         /* Map each Tx/cmd queue to its corresponding fifo */
5232         BUILD_BUG_ON(ARRAY_SIZE(default_queue_to_tx_fifo) != 7);
5233
5234         for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) {
5235                 int ac = default_queue_to_tx_fifo[i];
5236
5237                 il_txq_ctx_activate(il, i);
5238
5239                 if (ac == IL_TX_FIFO_UNUSED)
5240                         continue;
5241
5242                 il4965_tx_queue_set_status(il, &il->txq[i], ac, 0);
5243         }
5244
5245         spin_unlock_irqrestore(&il->lock, flags);
5246
5247         return 0;
5248 }
5249
5250 /*
5251  * il4965_alive_start - called after N_ALIVE notification received
5252  *                   from protocol/runtime uCode (initialization uCode's
5253  *                   Alive gets handled by il_init_alive_start()).
5254  */
5255 static void
5256 il4965_alive_start(struct il_priv *il)
5257 {
5258         int ret = 0;
5259
5260         D_INFO("Runtime Alive received.\n");
5261
5262         if (il->card_alive.is_valid != UCODE_VALID_OK) {
5263                 /* We had an error bringing up the hardware, so take it
5264                  * all the way back down so we can try again */
5265                 D_INFO("Alive failed.\n");
5266                 goto restart;
5267         }
5268
5269         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
5270          * This is a paranoid check, because we would not have gotten the
5271          * "runtime" alive if code weren't properly loaded.  */
5272         if (il4965_verify_ucode(il)) {
5273                 /* Runtime instruction load was bad;
5274                  * take it all the way back down so we can try again */
5275                 D_INFO("Bad runtime uCode load.\n");
5276                 goto restart;
5277         }
5278
5279         ret = il4965_alive_notify(il);
5280         if (ret) {
5281                 IL_WARN("Could not complete ALIVE transition [ntf]: %d\n", ret);
5282                 goto restart;
5283         }
5284
5285         /* After the ALIVE response, we can send host commands to the uCode */
5286         set_bit(S_ALIVE, &il->status);
5287
5288         /* Enable watchdog to monitor the driver tx queues */
5289         il_setup_watchdog(il);
5290
5291         if (il_is_rfkill(il))
5292                 return;
5293
5294         ieee80211_wake_queues(il->hw);
5295
5296         il->active_rate = RATES_MASK;
5297
5298         il_power_update_mode(il, true);
5299         D_INFO("Updated power mode\n");
5300
5301         if (il_is_associated(il)) {
5302                 struct il_rxon_cmd *active_rxon =
5303                     (struct il_rxon_cmd *)&il->active;
5304                 /* apply any changes in staging */
5305                 il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
5306                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5307         } else {
5308                 /* Initialize our rx_config data */
5309                 il_connection_init_rx_config(il);
5310
5311                 if (il->ops->set_rxon_chain)
5312                         il->ops->set_rxon_chain(il);
5313         }
5314
5315         /* Configure bluetooth coexistence if enabled */
5316         il_send_bt_config(il);
5317
5318         il4965_reset_run_time_calib(il);
5319
5320         set_bit(S_READY, &il->status);
5321
5322         /* Configure the adapter for unassociated operation */
5323         il_commit_rxon(il);
5324
5325         /* At this point, the NIC is initialized and operational */
5326         il4965_rf_kill_ct_config(il);
5327
5328         D_INFO("ALIVE processing complete.\n");
5329         wake_up(&il->wait_command_queue);
5330
5331         return;
5332
5333 restart:
5334         queue_work(il->workqueue, &il->restart);
5335 }
5336
5337 static void il4965_cancel_deferred_work(struct il_priv *il);
5338
5339 static void
5340 __il4965_down(struct il_priv *il)
5341 {
5342         unsigned long flags;
5343         int exit_pending;
5344
5345         D_INFO(DRV_NAME " is going down\n");
5346
5347         il_scan_cancel_timeout(il, 200);
5348
5349         exit_pending = test_and_set_bit(S_EXIT_PENDING, &il->status);
5350
5351         /* Stop TX queues watchdog. We need to have S_EXIT_PENDING bit set
5352          * to prevent rearm timer */
5353         del_timer_sync(&il->watchdog);
5354
5355         il_clear_ucode_stations(il);
5356
5357         /* FIXME: race conditions ? */
5358         spin_lock_irq(&il->sta_lock);
5359         /*
5360          * Remove all key information that is not stored as part
5361          * of station information since mac80211 may not have had
5362          * a chance to remove all the keys. When device is
5363          * reconfigured by mac80211 after an error all keys will
5364          * be reconfigured.
5365          */
5366         memset(il->_4965.wep_keys, 0, sizeof(il->_4965.wep_keys));
5367         il->_4965.key_mapping_keys = 0;
5368         spin_unlock_irq(&il->sta_lock);
5369
5370         il_dealloc_bcast_stations(il);
5371         il_clear_driver_stations(il);
5372
5373         /* Unblock any waiting calls */
5374         wake_up_all(&il->wait_command_queue);
5375
5376         /* Wipe out the EXIT_PENDING status bit if we are not actually
5377          * exiting the module */
5378         if (!exit_pending)
5379                 clear_bit(S_EXIT_PENDING, &il->status);
5380
5381         /* stop and reset the on-board processor */
5382         _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
5383
5384         /* tell the device to stop sending interrupts */
5385         spin_lock_irqsave(&il->lock, flags);
5386         il_disable_interrupts(il);
5387         spin_unlock_irqrestore(&il->lock, flags);
5388         il4965_synchronize_irq(il);
5389
5390         if (il->mac80211_registered)
5391                 ieee80211_stop_queues(il->hw);
5392
5393         /* If we have not previously called il_init() then
5394          * clear all bits but the RF Kill bit and return */
5395         if (!il_is_init(il)) {
5396                 il->status =
5397                     test_bit(S_RFKILL, &il->status) << S_RFKILL |
5398                     test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED |
5399                     test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING;
5400                 goto exit;
5401         }
5402
5403         /* ...otherwise clear out all the status bits but the RF Kill
5404          * bit and continue taking the NIC down. */
5405         il->status &=
5406             test_bit(S_RFKILL, &il->status) << S_RFKILL |
5407             test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED |
5408             test_bit(S_FW_ERROR, &il->status) << S_FW_ERROR |
5409             test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING;
5410
5411         /*
5412          * We disabled and synchronized interrupt, and priv->mutex is taken, so
5413          * here is the only thread which will program device registers, but
5414          * still have lockdep assertions, so we are taking reg_lock.
5415          */
5416         spin_lock_irq(&il->reg_lock);
5417         /* FIXME: il_grab_nic_access if rfkill is off ? */
5418
5419         il4965_txq_ctx_stop(il);
5420         il4965_rxq_stop(il);
5421         /* Power-down device's busmaster DMA clocks */
5422         _il_wr_prph(il, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
5423         udelay(5);
5424         /* Make sure (redundant) we've released our request to stay awake */
5425         _il_clear_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
5426         /* Stop the device, and put it in low power state */
5427         _il_apm_stop(il);
5428
5429         spin_unlock_irq(&il->reg_lock);
5430
5431         il4965_txq_ctx_unmap(il);
5432 exit:
5433         memset(&il->card_alive, 0, sizeof(struct il_alive_resp));
5434
5435         dev_kfree_skb(il->beacon_skb);
5436         il->beacon_skb = NULL;
5437
5438         /* clear out any free frames */
5439         il4965_clear_free_frames(il);
5440 }
5441
5442 static void
5443 il4965_down(struct il_priv *il)
5444 {
5445         mutex_lock(&il->mutex);
5446         __il4965_down(il);
5447         mutex_unlock(&il->mutex);
5448
5449         il4965_cancel_deferred_work(il);
5450 }
5451
5452
5453 static void
5454 il4965_set_hw_ready(struct il_priv *il)
5455 {
5456         int ret;
5457
5458         il_set_bit(il, CSR_HW_IF_CONFIG_REG,
5459                    CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
5460
5461         /* See if we got it */
5462         ret = _il_poll_bit(il, CSR_HW_IF_CONFIG_REG,
5463                            CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
5464                            CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
5465                            100);
5466         if (ret >= 0)
5467                 il->hw_ready = true;
5468
5469         D_INFO("hardware %s ready\n", (il->hw_ready) ? "" : "not");
5470 }
5471
5472 static void
5473 il4965_prepare_card_hw(struct il_priv *il)
5474 {
5475         int ret;
5476
5477         il->hw_ready = false;
5478
5479         il4965_set_hw_ready(il);
5480         if (il->hw_ready)
5481                 return;
5482
5483         /* If HW is not ready, prepare the conditions to check again */
5484         il_set_bit(il, CSR_HW_IF_CONFIG_REG, CSR_HW_IF_CONFIG_REG_PREPARE);
5485
5486         ret =
5487             _il_poll_bit(il, CSR_HW_IF_CONFIG_REG,
5488                          ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE,
5489                          CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000);
5490
5491         /* HW should be ready by now, check again. */
5492         if (ret != -ETIMEDOUT)
5493                 il4965_set_hw_ready(il);
5494 }
5495
5496 #define MAX_HW_RESTARTS 5
5497
5498 static int
5499 __il4965_up(struct il_priv *il)
5500 {
5501         int i;
5502         int ret;
5503
5504         if (test_bit(S_EXIT_PENDING, &il->status)) {
5505                 IL_WARN("Exit pending; will not bring the NIC up\n");
5506                 return -EIO;
5507         }
5508
5509         if (!il->ucode_data_backup.v_addr || !il->ucode_data.v_addr) {
5510                 IL_ERR("ucode not available for device bringup\n");
5511                 return -EIO;
5512         }
5513
5514         ret = il4965_alloc_bcast_station(il);
5515         if (ret) {
5516                 il_dealloc_bcast_stations(il);
5517                 return ret;
5518         }
5519
5520         il4965_prepare_card_hw(il);
5521         if (!il->hw_ready) {
5522                 il_dealloc_bcast_stations(il);
5523                 IL_ERR("HW not ready\n");
5524                 return -EIO;
5525         }
5526
5527         /* If platform's RF_KILL switch is NOT set to KILL */
5528         if (_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
5529                 clear_bit(S_RFKILL, &il->status);
5530         else {
5531                 set_bit(S_RFKILL, &il->status);
5532                 wiphy_rfkill_set_hw_state(il->hw->wiphy, true);
5533
5534                 il_dealloc_bcast_stations(il);
5535                 il_enable_rfkill_int(il);
5536                 IL_WARN("Radio disabled by HW RF Kill switch\n");
5537                 return 0;
5538         }
5539
5540         _il_wr(il, CSR_INT, 0xFFFFFFFF);
5541
5542         /* must be initialised before il_hw_nic_init */
5543         il->cmd_queue = IL_DEFAULT_CMD_QUEUE_NUM;
5544
5545         ret = il4965_hw_nic_init(il);
5546         if (ret) {
5547                 IL_ERR("Unable to init nic\n");
5548                 il_dealloc_bcast_stations(il);
5549                 return ret;
5550         }
5551
5552         /* make sure rfkill handshake bits are cleared */
5553         _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5554         _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
5555
5556         /* clear (again), then enable host interrupts */
5557         _il_wr(il, CSR_INT, 0xFFFFFFFF);
5558         il_enable_interrupts(il);
5559
5560         /* really make sure rfkill handshake bits are cleared */
5561         _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5562         _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5563
5564         /* Copy original ucode data image from disk into backup cache.
5565          * This will be used to initialize the on-board processor's
5566          * data SRAM for a clean start when the runtime program first loads. */
5567         memcpy(il->ucode_data_backup.v_addr, il->ucode_data.v_addr,
5568                il->ucode_data.len);
5569
5570         for (i = 0; i < MAX_HW_RESTARTS; i++) {
5571
5572                 /* load bootstrap state machine,
5573                  * load bootstrap program into processor's memory,
5574                  * prepare to load the "initialize" uCode */
5575                 ret = il->ops->load_ucode(il);
5576
5577                 if (ret) {
5578                         IL_ERR("Unable to set up bootstrap uCode: %d\n", ret);
5579                         continue;
5580                 }
5581
5582                 /* start card; "initialize" will load runtime ucode */
5583                 il4965_nic_start(il);
5584
5585                 D_INFO(DRV_NAME " is coming up\n");
5586
5587                 return 0;
5588         }
5589
5590         set_bit(S_EXIT_PENDING, &il->status);
5591         __il4965_down(il);
5592         clear_bit(S_EXIT_PENDING, &il->status);
5593
5594         /* tried to restart and config the device for as long as our
5595          * patience could withstand */
5596         IL_ERR("Unable to initialize device after %d attempts.\n", i);
5597         return -EIO;
5598 }
5599
5600 /*****************************************************************************
5601  *
5602  * Workqueue callbacks
5603  *
5604  *****************************************************************************/
5605
5606 static void
5607 il4965_bg_init_alive_start(struct work_struct *data)
5608 {
5609         struct il_priv *il =
5610             container_of(data, struct il_priv, init_alive_start.work);
5611
5612         mutex_lock(&il->mutex);
5613         if (test_bit(S_EXIT_PENDING, &il->status))
5614                 goto out;
5615
5616         il->ops->init_alive_start(il);
5617 out:
5618         mutex_unlock(&il->mutex);
5619 }
5620
5621 static void
5622 il4965_bg_alive_start(struct work_struct *data)
5623 {
5624         struct il_priv *il =
5625             container_of(data, struct il_priv, alive_start.work);
5626
5627         mutex_lock(&il->mutex);
5628         if (test_bit(S_EXIT_PENDING, &il->status))
5629                 goto out;
5630
5631         il4965_alive_start(il);
5632 out:
5633         mutex_unlock(&il->mutex);
5634 }
5635
5636 static void
5637 il4965_bg_run_time_calib_work(struct work_struct *work)
5638 {
5639         struct il_priv *il = container_of(work, struct il_priv,
5640                                           run_time_calib_work);
5641
5642         mutex_lock(&il->mutex);
5643
5644         if (test_bit(S_EXIT_PENDING, &il->status) ||
5645             test_bit(S_SCANNING, &il->status)) {
5646                 mutex_unlock(&il->mutex);
5647                 return;
5648         }
5649
5650         if (il->start_calib) {
5651                 il4965_chain_noise_calibration(il, (void *)&il->_4965.stats);
5652                 il4965_sensitivity_calibration(il, (void *)&il->_4965.stats);
5653         }
5654
5655         mutex_unlock(&il->mutex);
5656 }
5657
5658 static void
5659 il4965_bg_restart(struct work_struct *data)
5660 {
5661         struct il_priv *il = container_of(data, struct il_priv, restart);
5662
5663         if (test_bit(S_EXIT_PENDING, &il->status))
5664                 return;
5665
5666         if (test_and_clear_bit(S_FW_ERROR, &il->status)) {
5667                 mutex_lock(&il->mutex);
5668                 il->is_open = 0;
5669
5670                 __il4965_down(il);
5671
5672                 mutex_unlock(&il->mutex);
5673                 il4965_cancel_deferred_work(il);
5674                 ieee80211_restart_hw(il->hw);
5675         } else {
5676                 il4965_down(il);
5677
5678                 mutex_lock(&il->mutex);
5679                 if (test_bit(S_EXIT_PENDING, &il->status)) {
5680                         mutex_unlock(&il->mutex);
5681                         return;
5682                 }
5683
5684                 __il4965_up(il);
5685                 mutex_unlock(&il->mutex);
5686         }
5687 }
5688
5689 static void
5690 il4965_bg_rx_replenish(struct work_struct *data)
5691 {
5692         struct il_priv *il = container_of(data, struct il_priv, rx_replenish);
5693
5694         if (test_bit(S_EXIT_PENDING, &il->status))
5695                 return;
5696
5697         mutex_lock(&il->mutex);
5698         il4965_rx_replenish(il);
5699         mutex_unlock(&il->mutex);
5700 }
5701
5702 /*****************************************************************************
5703  *
5704  * mac80211 entry point functions
5705  *
5706  *****************************************************************************/
5707
5708 #define UCODE_READY_TIMEOUT     (4 * HZ)
5709
5710 /*
5711  * Not a mac80211 entry point function, but it fits in with all the
5712  * other mac80211 functions grouped here.
5713  */
5714 static int
5715 il4965_mac_setup_register(struct il_priv *il, u32 max_probe_length)
5716 {
5717         int ret;
5718         struct ieee80211_hw *hw = il->hw;
5719
5720         hw->rate_control_algorithm = "iwl-4965-rs";
5721
5722         /* Tell mac80211 our characteristics */
5723         ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
5724         ieee80211_hw_set(hw, SUPPORTS_PS);
5725         ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
5726         ieee80211_hw_set(hw, SPECTRUM_MGMT);
5727         ieee80211_hw_set(hw, NEED_DTIM_BEFORE_ASSOC);
5728         ieee80211_hw_set(hw, SIGNAL_DBM);
5729         ieee80211_hw_set(hw, AMPDU_AGGREGATION);
5730         if (il->cfg->sku & IL_SKU_N)
5731                 hw->wiphy->features |= NL80211_FEATURE_DYNAMIC_SMPS |
5732                                        NL80211_FEATURE_STATIC_SMPS;
5733
5734         hw->sta_data_size = sizeof(struct il_station_priv);
5735         hw->vif_data_size = sizeof(struct il_vif_priv);
5736
5737         hw->wiphy->interface_modes =
5738             BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_ADHOC);
5739
5740         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
5741         hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
5742                                        REGULATORY_DISABLE_BEACON_HINTS;
5743
5744         /*
5745          * For now, disable PS by default because it affects
5746          * RX performance significantly.
5747          */
5748         hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
5749
5750         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
5751         /* we create the 802.11 header and a zero-length SSID element */
5752         hw->wiphy->max_scan_ie_len = max_probe_length - 24 - 2;
5753
5754         /* Default value; 4 EDCA QOS priorities */
5755         hw->queues = 4;
5756
5757         hw->max_listen_interval = IL_CONN_MAX_LISTEN_INTERVAL;
5758
5759         if (il->bands[NL80211_BAND_2GHZ].n_channels)
5760                 il->hw->wiphy->bands[NL80211_BAND_2GHZ] =
5761                     &il->bands[NL80211_BAND_2GHZ];
5762         if (il->bands[NL80211_BAND_5GHZ].n_channels)
5763                 il->hw->wiphy->bands[NL80211_BAND_5GHZ] =
5764                     &il->bands[NL80211_BAND_5GHZ];
5765
5766         il_leds_init(il);
5767
5768         wiphy_ext_feature_set(il->hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
5769
5770         ret = ieee80211_register_hw(il->hw);
5771         if (ret) {
5772                 IL_ERR("Failed to register hw (error %d)\n", ret);
5773                 return ret;
5774         }
5775         il->mac80211_registered = 1;
5776
5777         return 0;
5778 }
5779
5780 int
5781 il4965_mac_start(struct ieee80211_hw *hw)
5782 {
5783         struct il_priv *il = hw->priv;
5784         int ret;
5785
5786         D_MAC80211("enter\n");
5787
5788         /* we should be verifying the device is ready to be opened */
5789         mutex_lock(&il->mutex);
5790         ret = __il4965_up(il);
5791         mutex_unlock(&il->mutex);
5792
5793         if (ret)
5794                 return ret;
5795
5796         if (il_is_rfkill(il))
5797                 goto out;
5798
5799         D_INFO("Start UP work done.\n");
5800
5801         /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
5802          * mac80211 will not be run successfully. */
5803         ret = wait_event_timeout(il->wait_command_queue,
5804                                  test_bit(S_READY, &il->status),
5805                                  UCODE_READY_TIMEOUT);
5806         if (!ret) {
5807                 if (!test_bit(S_READY, &il->status)) {
5808                         IL_ERR("START_ALIVE timeout after %dms.\n",
5809                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
5810                         return -ETIMEDOUT;
5811                 }
5812         }
5813
5814         il4965_led_enable(il);
5815
5816 out:
5817         il->is_open = 1;
5818         D_MAC80211("leave\n");
5819         return 0;
5820 }
5821
5822 void
5823 il4965_mac_stop(struct ieee80211_hw *hw, bool suspend)
5824 {
5825         struct il_priv *il = hw->priv;
5826
5827         D_MAC80211("enter\n");
5828
5829         if (!il->is_open)
5830                 return;
5831
5832         il->is_open = 0;
5833
5834         il4965_down(il);
5835
5836         flush_workqueue(il->workqueue);
5837
5838         /* User space software may expect getting rfkill changes
5839          * even if interface is down */
5840         _il_wr(il, CSR_INT, 0xFFFFFFFF);
5841         il_enable_rfkill_int(il);
5842
5843         D_MAC80211("leave\n");
5844 }
5845
5846 void
5847 il4965_mac_tx(struct ieee80211_hw *hw,
5848               struct ieee80211_tx_control *control,
5849               struct sk_buff *skb)
5850 {
5851         struct il_priv *il = hw->priv;
5852
5853         D_MACDUMP("enter\n");
5854
5855         D_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
5856              ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
5857
5858         if (il4965_tx_skb(il, control->sta, skb))
5859                 dev_kfree_skb_any(skb);
5860
5861         D_MACDUMP("leave\n");
5862 }
5863
5864 void
5865 il4965_mac_update_tkip_key(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5866                            struct ieee80211_key_conf *keyconf,
5867                            struct ieee80211_sta *sta, u32 iv32, u16 * phase1key)
5868 {
5869         struct il_priv *il = hw->priv;
5870
5871         D_MAC80211("enter\n");
5872
5873         il4965_update_tkip_key(il, keyconf, sta, iv32, phase1key);
5874
5875         D_MAC80211("leave\n");
5876 }
5877
5878 int
5879 il4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
5880                    struct ieee80211_vif *vif, struct ieee80211_sta *sta,
5881                    struct ieee80211_key_conf *key)
5882 {
5883         struct il_priv *il = hw->priv;
5884         int ret;
5885         u8 sta_id;
5886         bool is_default_wep_key = false;
5887
5888         D_MAC80211("enter\n");
5889
5890         if (il->cfg->mod_params->sw_crypto) {
5891                 D_MAC80211("leave - hwcrypto disabled\n");
5892                 return -EOPNOTSUPP;
5893         }
5894
5895         /*
5896          * To support IBSS RSN, don't program group keys in IBSS, the
5897          * hardware will then not attempt to decrypt the frames.
5898          */
5899         if (vif->type == NL80211_IFTYPE_ADHOC &&
5900             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
5901                 D_MAC80211("leave - ad-hoc group key\n");
5902                 return -EOPNOTSUPP;
5903         }
5904
5905         sta_id = il_sta_id_or_broadcast(il, sta);
5906         if (sta_id == IL_INVALID_STATION)
5907                 return -EINVAL;
5908
5909         mutex_lock(&il->mutex);
5910         il_scan_cancel_timeout(il, 100);
5911
5912         /*
5913          * If we are getting WEP group key and we didn't receive any key mapping
5914          * so far, we are in legacy wep mode (group key only), otherwise we are
5915          * in 1X mode.
5916          * In legacy wep mode, we use another host command to the uCode.
5917          */
5918         if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
5919              key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
5920                 if (cmd == SET_KEY)
5921                         is_default_wep_key = !il->_4965.key_mapping_keys;
5922                 else
5923                         is_default_wep_key =
5924                             (key->hw_key_idx == HW_KEY_DEFAULT);
5925         }
5926
5927         switch (cmd) {
5928         case SET_KEY:
5929                 if (is_default_wep_key)
5930                         ret = il4965_set_default_wep_key(il, key);
5931                 else
5932                         ret = il4965_set_dynamic_key(il, key, sta_id);
5933
5934                 D_MAC80211("enable hwcrypto key\n");
5935                 break;
5936         case DISABLE_KEY:
5937                 if (is_default_wep_key)
5938                         ret = il4965_remove_default_wep_key(il, key);
5939                 else
5940                         ret = il4965_remove_dynamic_key(il, key, sta_id);
5941
5942                 D_MAC80211("disable hwcrypto key\n");
5943                 break;
5944         default:
5945                 ret = -EINVAL;
5946         }
5947
5948         mutex_unlock(&il->mutex);
5949         D_MAC80211("leave\n");
5950
5951         return ret;
5952 }
5953
5954 int
5955 il4965_mac_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5956                         struct ieee80211_ampdu_params *params)
5957 {
5958         struct il_priv *il = hw->priv;
5959         int ret = -EINVAL;
5960         struct ieee80211_sta *sta = params->sta;
5961         enum ieee80211_ampdu_mlme_action action = params->action;
5962         u16 tid = params->tid;
5963         u16 *ssn = &params->ssn;
5964
5965         D_HT("A-MPDU action on addr %pM tid %d\n", sta->addr, tid);
5966
5967         if (!(il->cfg->sku & IL_SKU_N))
5968                 return -EACCES;
5969
5970         mutex_lock(&il->mutex);
5971
5972         switch (action) {
5973         case IEEE80211_AMPDU_RX_START:
5974                 D_HT("start Rx\n");
5975                 ret = il4965_sta_rx_agg_start(il, sta, tid, *ssn);
5976                 break;
5977         case IEEE80211_AMPDU_RX_STOP:
5978                 D_HT("stop Rx\n");
5979                 ret = il4965_sta_rx_agg_stop(il, sta, tid);
5980                 if (test_bit(S_EXIT_PENDING, &il->status))
5981                         ret = 0;
5982                 break;
5983         case IEEE80211_AMPDU_TX_START:
5984                 D_HT("start Tx\n");
5985                 ret = il4965_tx_agg_start(il, vif, sta, tid, ssn);
5986                 break;
5987         case IEEE80211_AMPDU_TX_STOP_CONT:
5988         case IEEE80211_AMPDU_TX_STOP_FLUSH:
5989         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
5990                 D_HT("stop Tx\n");
5991                 ret = il4965_tx_agg_stop(il, vif, sta, tid);
5992                 if (test_bit(S_EXIT_PENDING, &il->status))
5993                         ret = 0;
5994                 break;
5995         case IEEE80211_AMPDU_TX_OPERATIONAL:
5996                 ret = 0;
5997                 break;
5998         }
5999         mutex_unlock(&il->mutex);
6000
6001         return ret;
6002 }
6003
6004 int
6005 il4965_mac_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
6006                    struct ieee80211_sta *sta)
6007 {
6008         struct il_priv *il = hw->priv;
6009         struct il_station_priv *sta_priv = (void *)sta->drv_priv;
6010         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
6011         int ret;
6012         u8 sta_id;
6013
6014         D_INFO("received request to add station %pM\n", sta->addr);
6015         mutex_lock(&il->mutex);
6016         D_INFO("proceeding to add station %pM\n", sta->addr);
6017         sta_priv->common.sta_id = IL_INVALID_STATION;
6018
6019         atomic_set(&sta_priv->pending_frames, 0);
6020
6021         ret =
6022             il_add_station_common(il, sta->addr, is_ap, sta, &sta_id);
6023         if (ret) {
6024                 IL_ERR("Unable to add station %pM (%d)\n", sta->addr, ret);
6025                 /* Should we return success if return code is EEXIST ? */
6026                 mutex_unlock(&il->mutex);
6027                 return ret;
6028         }
6029
6030         sta_priv->common.sta_id = sta_id;
6031
6032         /* Initialize rate scaling */
6033         D_INFO("Initializing rate scaling for station %pM\n", sta->addr);
6034         il4965_rs_rate_init(il, sta, sta_id);
6035         mutex_unlock(&il->mutex);
6036
6037         return 0;
6038 }
6039
6040 void
6041 il4965_mac_channel_switch(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
6042                           struct ieee80211_channel_switch *ch_switch)
6043 {
6044         struct il_priv *il = hw->priv;
6045         const struct il_channel_info *ch_info;
6046         struct ieee80211_conf *conf = &hw->conf;
6047         struct ieee80211_channel *channel = ch_switch->chandef.chan;
6048         struct il_ht_config *ht_conf = &il->current_ht_config;
6049         u16 ch;
6050
6051         D_MAC80211("enter\n");
6052
6053         mutex_lock(&il->mutex);
6054
6055         if (il_is_rfkill(il))
6056                 goto out;
6057
6058         if (test_bit(S_EXIT_PENDING, &il->status) ||
6059             test_bit(S_SCANNING, &il->status) ||
6060             test_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
6061                 goto out;
6062
6063         if (!il_is_associated(il))
6064                 goto out;
6065
6066         if (!il->ops->set_channel_switch)
6067                 goto out;
6068
6069         ch = channel->hw_value;
6070         if (le16_to_cpu(il->active.channel) == ch)
6071                 goto out;
6072
6073         ch_info = il_get_channel_info(il, channel->band, ch);
6074         if (!il_is_channel_valid(ch_info)) {
6075                 D_MAC80211("invalid channel\n");
6076                 goto out;
6077         }
6078
6079         spin_lock_irq(&il->lock);
6080
6081         il->current_ht_config.smps = conf->smps_mode;
6082
6083         /* Configure HT40 channels */
6084         switch (cfg80211_get_chandef_type(&ch_switch->chandef)) {
6085         case NL80211_CHAN_NO_HT:
6086         case NL80211_CHAN_HT20:
6087                 il->ht.is_40mhz = false;
6088                 il->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
6089                 break;
6090         case NL80211_CHAN_HT40MINUS:
6091                 il->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
6092                 il->ht.is_40mhz = true;
6093                 break;
6094         case NL80211_CHAN_HT40PLUS:
6095                 il->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
6096                 il->ht.is_40mhz = true;
6097                 break;
6098         }
6099
6100         if ((le16_to_cpu(il->staging.channel) != ch))
6101                 il->staging.flags = 0;
6102
6103         il_set_rxon_channel(il, channel);
6104         il_set_rxon_ht(il, ht_conf);
6105         il_set_flags_for_band(il, channel->band, il->vif);
6106
6107         spin_unlock_irq(&il->lock);
6108
6109         il_set_rate(il);
6110         /*
6111          * at this point, staging_rxon has the
6112          * configuration for channel switch
6113          */
6114         set_bit(S_CHANNEL_SWITCH_PENDING, &il->status);
6115         il->switch_channel = cpu_to_le16(ch);
6116         if (il->ops->set_channel_switch(il, ch_switch)) {
6117                 clear_bit(S_CHANNEL_SWITCH_PENDING, &il->status);
6118                 il->switch_channel = 0;
6119                 ieee80211_chswitch_done(il->vif, false, 0);
6120         }
6121
6122 out:
6123         mutex_unlock(&il->mutex);
6124         D_MAC80211("leave\n");
6125 }
6126
6127 void
6128 il4965_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags,
6129                         unsigned int *total_flags, u64 multicast)
6130 {
6131         struct il_priv *il = hw->priv;
6132         __le32 filter_or = 0, filter_nand = 0;
6133
6134 #define CHK(test, flag) do { \
6135         if (*total_flags & (test))              \
6136                 filter_or |= (flag);            \
6137         else                                    \
6138                 filter_nand |= (flag);          \
6139         } while (0)
6140
6141         D_MAC80211("Enter: changed: 0x%x, total: 0x%x\n", changed_flags,
6142                    *total_flags);
6143
6144         CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK);
6145         /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
6146         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
6147         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
6148
6149 #undef CHK
6150
6151         mutex_lock(&il->mutex);
6152
6153         il->staging.filter_flags &= ~filter_nand;
6154         il->staging.filter_flags |= filter_or;
6155
6156         /*
6157          * Not committing directly because hardware can perform a scan,
6158          * but we'll eventually commit the filter flags change anyway.
6159          */
6160
6161         mutex_unlock(&il->mutex);
6162
6163         /*
6164          * Receiving all multicast frames is always enabled by the
6165          * default flags setup in il_connection_init_rx_config()
6166          * since we currently do not support programming multicast
6167          * filters into the device.
6168          */
6169         *total_flags &=
6170             FIF_OTHER_BSS | FIF_ALLMULTI |
6171             FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
6172 }
6173
6174 /*****************************************************************************
6175  *
6176  * driver setup and teardown
6177  *
6178  *****************************************************************************/
6179
6180 static void
6181 il4965_bg_txpower_work(struct work_struct *work)
6182 {
6183         struct il_priv *il = container_of(work, struct il_priv,
6184                                           txpower_work);
6185
6186         mutex_lock(&il->mutex);
6187
6188         /* If a scan happened to start before we got here
6189          * then just return; the stats notification will
6190          * kick off another scheduled work to compensate for
6191          * any temperature delta we missed here. */
6192         if (test_bit(S_EXIT_PENDING, &il->status) ||
6193             test_bit(S_SCANNING, &il->status))
6194                 goto out;
6195
6196         /* Regardless of if we are associated, we must reconfigure the
6197          * TX power since frames can be sent on non-radar channels while
6198          * not associated */
6199         il->ops->send_tx_power(il);
6200
6201         /* Update last_temperature to keep is_calib_needed from running
6202          * when it isn't needed... */
6203         il->last_temperature = il->temperature;
6204 out:
6205         mutex_unlock(&il->mutex);
6206 }
6207
6208 static int
6209 il4965_setup_deferred_work(struct il_priv *il)
6210 {
6211         il->workqueue = create_singlethread_workqueue(DRV_NAME);
6212         if (!il->workqueue)
6213                 return -ENOMEM;
6214
6215         init_waitqueue_head(&il->wait_command_queue);
6216
6217         INIT_WORK(&il->restart, il4965_bg_restart);
6218         INIT_WORK(&il->rx_replenish, il4965_bg_rx_replenish);
6219         INIT_WORK(&il->run_time_calib_work, il4965_bg_run_time_calib_work);
6220         INIT_DELAYED_WORK(&il->init_alive_start, il4965_bg_init_alive_start);
6221         INIT_DELAYED_WORK(&il->alive_start, il4965_bg_alive_start);
6222
6223         il_setup_scan_deferred_work(il);
6224
6225         INIT_WORK(&il->txpower_work, il4965_bg_txpower_work);
6226
6227         timer_setup(&il->stats_periodic, il4965_bg_stats_periodic, 0);
6228
6229         timer_setup(&il->watchdog, il_bg_watchdog, 0);
6230
6231         tasklet_setup(&il->irq_tasklet, il4965_irq_tasklet);
6232
6233         return 0;
6234 }
6235
6236 static void
6237 il4965_cancel_deferred_work(struct il_priv *il)
6238 {
6239         cancel_work_sync(&il->txpower_work);
6240         cancel_delayed_work_sync(&il->init_alive_start);
6241         cancel_delayed_work(&il->alive_start);
6242         cancel_work_sync(&il->run_time_calib_work);
6243
6244         il_cancel_scan_deferred_work(il);
6245
6246         del_timer_sync(&il->stats_periodic);
6247 }
6248
6249 static void
6250 il4965_init_hw_rates(struct il_priv *il, struct ieee80211_rate *rates)
6251 {
6252         int i;
6253
6254         for (i = 0; i < RATE_COUNT_LEGACY; i++) {
6255                 rates[i].bitrate = il_rates[i].ieee * 5;
6256                 rates[i].hw_value = i;  /* Rate scaling will work on idxes */
6257                 rates[i].hw_value_short = i;
6258                 rates[i].flags = 0;
6259                 if ((i >= IL_FIRST_CCK_RATE) && (i <= IL_LAST_CCK_RATE)) {
6260                         /*
6261                          * If CCK != 1M then set short preamble rate flag.
6262                          */
6263                         rates[i].flags |=
6264                             (il_rates[i].plcp ==
6265                              RATE_1M_PLCP) ? 0 : IEEE80211_RATE_SHORT_PREAMBLE;
6266                 }
6267         }
6268 }
6269
6270 /*
6271  * Acquire il->lock before calling this function !
6272  */
6273 void
6274 il4965_set_wr_ptrs(struct il_priv *il, int txq_id, u32 idx)
6275 {
6276         il_wr(il, HBUS_TARG_WRPTR, (idx & 0xff) | (txq_id << 8));
6277         il_wr_prph(il, IL49_SCD_QUEUE_RDPTR(txq_id), idx);
6278 }
6279
6280 void
6281 il4965_tx_queue_set_status(struct il_priv *il, struct il_tx_queue *txq,
6282                            int tx_fifo_id, int scd_retry)
6283 {
6284         int txq_id = txq->q.id;
6285
6286         /* Find out whether to activate Tx queue */
6287         int active = test_bit(txq_id, &il->txq_ctx_active_msk) ? 1 : 0;
6288
6289         /* Set up and activate */
6290         il_wr_prph(il, IL49_SCD_QUEUE_STATUS_BITS(txq_id),
6291                    (active << IL49_SCD_QUEUE_STTS_REG_POS_ACTIVE) |
6292                    (tx_fifo_id << IL49_SCD_QUEUE_STTS_REG_POS_TXF) |
6293                    (scd_retry << IL49_SCD_QUEUE_STTS_REG_POS_WSL) |
6294                    (scd_retry << IL49_SCD_QUEUE_STTS_REG_POS_SCD_ACK) |
6295                    IL49_SCD_QUEUE_STTS_REG_MSK);
6296
6297         txq->sched_retry = scd_retry;
6298
6299         D_INFO("%s %s Queue %d on AC %d\n", active ? "Activate" : "Deactivate",
6300                scd_retry ? "BA" : "AC", txq_id, tx_fifo_id);
6301 }
6302
6303 static const struct ieee80211_ops il4965_mac_ops = {
6304         .add_chanctx = ieee80211_emulate_add_chanctx,
6305         .remove_chanctx = ieee80211_emulate_remove_chanctx,
6306         .change_chanctx = ieee80211_emulate_change_chanctx,
6307         .switch_vif_chanctx = ieee80211_emulate_switch_vif_chanctx,
6308         .tx = il4965_mac_tx,
6309         .wake_tx_queue = ieee80211_handle_wake_tx_queue,
6310         .start = il4965_mac_start,
6311         .stop = il4965_mac_stop,
6312         .add_interface = il_mac_add_interface,
6313         .remove_interface = il_mac_remove_interface,
6314         .change_interface = il_mac_change_interface,
6315         .config = il_mac_config,
6316         .configure_filter = il4965_configure_filter,
6317         .set_key = il4965_mac_set_key,
6318         .update_tkip_key = il4965_mac_update_tkip_key,
6319         .conf_tx = il_mac_conf_tx,
6320         .reset_tsf = il_mac_reset_tsf,
6321         .bss_info_changed = il_mac_bss_info_changed,
6322         .ampdu_action = il4965_mac_ampdu_action,
6323         .hw_scan = il_mac_hw_scan,
6324         .sta_add = il4965_mac_sta_add,
6325         .sta_remove = il_mac_sta_remove,
6326         .channel_switch = il4965_mac_channel_switch,
6327         .tx_last_beacon = il_mac_tx_last_beacon,
6328         .flush = il_mac_flush,
6329 };
6330
6331 static int
6332 il4965_init_drv(struct il_priv *il)
6333 {
6334         int ret;
6335
6336         spin_lock_init(&il->sta_lock);
6337         spin_lock_init(&il->hcmd_lock);
6338
6339         INIT_LIST_HEAD(&il->free_frames);
6340
6341         mutex_init(&il->mutex);
6342
6343         il->ieee_channels = NULL;
6344         il->ieee_rates = NULL;
6345         il->band = NL80211_BAND_2GHZ;
6346
6347         il->iw_mode = NL80211_IFTYPE_STATION;
6348         il->current_ht_config.smps = IEEE80211_SMPS_STATIC;
6349         il->missed_beacon_threshold = IL_MISSED_BEACON_THRESHOLD_DEF;
6350
6351         /* initialize force reset */
6352         il->force_reset.reset_duration = IL_DELAY_NEXT_FORCE_FW_RELOAD;
6353
6354         /* Choose which receivers/antennas to use */
6355         if (il->ops->set_rxon_chain)
6356                 il->ops->set_rxon_chain(il);
6357
6358         il_init_scan_params(il);
6359
6360         ret = il_init_channel_map(il);
6361         if (ret) {
6362                 IL_ERR("initializing regulatory failed: %d\n", ret);
6363                 goto err;
6364         }
6365
6366         ret = il_init_geos(il);
6367         if (ret) {
6368                 IL_ERR("initializing geos failed: %d\n", ret);
6369                 goto err_free_channel_map;
6370         }
6371         il4965_init_hw_rates(il, il->ieee_rates);
6372
6373         return 0;
6374
6375 err_free_channel_map:
6376         il_free_channel_map(il);
6377 err:
6378         return ret;
6379 }
6380
6381 static void
6382 il4965_uninit_drv(struct il_priv *il)
6383 {
6384         il_free_geos(il);
6385         il_free_channel_map(il);
6386         kfree(il->scan_cmd);
6387 }
6388
6389 static void
6390 il4965_hw_detect(struct il_priv *il)
6391 {
6392         il->hw_rev = _il_rd(il, CSR_HW_REV);
6393         il->hw_wa_rev = _il_rd(il, CSR_HW_REV_WA_REG);
6394         il->rev_id = il->pci_dev->revision;
6395         D_INFO("HW Revision ID = 0x%X\n", il->rev_id);
6396 }
6397
6398 static const struct il_sensitivity_ranges il4965_sensitivity = {
6399         .min_nrg_cck = 97,
6400         .max_nrg_cck = 0,       /* not used, set to 0 */
6401
6402         .auto_corr_min_ofdm = 85,
6403         .auto_corr_min_ofdm_mrc = 170,
6404         .auto_corr_min_ofdm_x1 = 105,
6405         .auto_corr_min_ofdm_mrc_x1 = 220,
6406
6407         .auto_corr_max_ofdm = 120,
6408         .auto_corr_max_ofdm_mrc = 210,
6409         .auto_corr_max_ofdm_x1 = 140,
6410         .auto_corr_max_ofdm_mrc_x1 = 270,
6411
6412         .auto_corr_min_cck = 125,
6413         .auto_corr_max_cck = 200,
6414         .auto_corr_min_cck_mrc = 200,
6415         .auto_corr_max_cck_mrc = 400,
6416
6417         .nrg_th_cck = 100,
6418         .nrg_th_ofdm = 100,
6419
6420         .barker_corr_th_min = 190,
6421         .barker_corr_th_min_mrc = 390,
6422         .nrg_th_cca = 62,
6423 };
6424
6425 static void
6426 il4965_set_hw_params(struct il_priv *il)
6427 {
6428         il->hw_params.bcast_id = IL4965_BROADCAST_ID;
6429         il->hw_params.max_rxq_size = RX_QUEUE_SIZE;
6430         il->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
6431         if (il->cfg->mod_params->amsdu_size_8K)
6432                 il->hw_params.rx_page_order = get_order(IL_RX_BUF_SIZE_8K);
6433         else
6434                 il->hw_params.rx_page_order = get_order(IL_RX_BUF_SIZE_4K);
6435
6436         il->hw_params.max_beacon_itrvl = IL_MAX_UCODE_BEACON_INTERVAL;
6437
6438         if (il->cfg->mod_params->disable_11n)
6439                 il->cfg->sku &= ~IL_SKU_N;
6440
6441         if (il->cfg->mod_params->num_of_queues >= IL_MIN_NUM_QUEUES &&
6442             il->cfg->mod_params->num_of_queues <= IL49_NUM_QUEUES)
6443                 il->cfg->num_of_queues =
6444                     il->cfg->mod_params->num_of_queues;
6445
6446         il->hw_params.max_txq_num = il->cfg->num_of_queues;
6447         il->hw_params.dma_chnl_num = FH49_TCSR_CHNL_NUM;
6448         il->hw_params.scd_bc_tbls_size =
6449             il->cfg->num_of_queues *
6450             sizeof(struct il4965_scd_bc_tbl);
6451
6452         il->hw_params.tfd_size = sizeof(struct il_tfd);
6453         il->hw_params.max_stations = IL4965_STATION_COUNT;
6454         il->hw_params.max_data_size = IL49_RTC_DATA_SIZE;
6455         il->hw_params.max_inst_size = IL49_RTC_INST_SIZE;
6456         il->hw_params.max_bsm_size = BSM_SRAM_SIZE;
6457         il->hw_params.ht40_channel = BIT(NL80211_BAND_5GHZ);
6458
6459         il->hw_params.rx_wrt_ptr_reg = FH49_RSCSR_CHNL0_WPTR;
6460
6461         il->hw_params.tx_chains_num = il4965_num_of_ant(il->cfg->valid_tx_ant);
6462         il->hw_params.rx_chains_num = il4965_num_of_ant(il->cfg->valid_rx_ant);
6463         il->hw_params.valid_tx_ant = il->cfg->valid_tx_ant;
6464         il->hw_params.valid_rx_ant = il->cfg->valid_rx_ant;
6465
6466         il->hw_params.ct_kill_threshold =
6467            celsius_to_kelvin(CT_KILL_THRESHOLD_LEGACY);
6468
6469         il->hw_params.sens = &il4965_sensitivity;
6470         il->hw_params.beacon_time_tsf_bits = IL4965_EXT_BEACON_TIME_POS;
6471 }
6472
6473 static int
6474 il4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
6475 {
6476         int err = 0;
6477         struct il_priv *il;
6478         struct ieee80211_hw *hw;
6479         struct il_cfg *cfg = (struct il_cfg *)(ent->driver_data);
6480         unsigned long flags;
6481         u16 pci_cmd;
6482
6483         /************************
6484          * 1. Allocating HW data
6485          ************************/
6486
6487         hw = ieee80211_alloc_hw(sizeof(struct il_priv), &il4965_mac_ops);
6488         if (!hw) {
6489                 err = -ENOMEM;
6490                 goto out;
6491         }
6492         il = hw->priv;
6493         il->hw = hw;
6494         SET_IEEE80211_DEV(hw, &pdev->dev);
6495
6496         D_INFO("*** LOAD DRIVER ***\n");
6497         il->cfg = cfg;
6498         il->ops = &il4965_ops;
6499 #ifdef CONFIG_IWLEGACY_DEBUGFS
6500         il->debugfs_ops = &il4965_debugfs_ops;
6501 #endif
6502         il->pci_dev = pdev;
6503         il->inta_mask = CSR_INI_SET_MASK;
6504
6505         /**************************
6506          * 2. Initializing PCI bus
6507          **************************/
6508         pci_disable_link_state(pdev,
6509                                PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 |
6510                                PCIE_LINK_STATE_CLKPM);
6511
6512         if (pci_enable_device(pdev)) {
6513                 err = -ENODEV;
6514                 goto out_ieee80211_free_hw;
6515         }
6516
6517         pci_set_master(pdev);
6518
6519         err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(36));
6520         if (err) {
6521                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
6522                 /* both attempts failed: */
6523                 if (err) {
6524                         IL_WARN("No suitable DMA available.\n");
6525                         goto out_pci_disable_device;
6526                 }
6527         }
6528
6529         err = pci_request_regions(pdev, DRV_NAME);
6530         if (err)
6531                 goto out_pci_disable_device;
6532
6533         pci_set_drvdata(pdev, il);
6534
6535         /***********************
6536          * 3. Read REV register
6537          ***********************/
6538         il->hw_base = pci_ioremap_bar(pdev, 0);
6539         if (!il->hw_base) {
6540                 err = -ENODEV;
6541                 goto out_pci_release_regions;
6542         }
6543
6544         D_INFO("pci_resource_len = 0x%08llx\n",
6545                (unsigned long long)pci_resource_len(pdev, 0));
6546         D_INFO("pci_resource_base = %p\n", il->hw_base);
6547
6548         /* these spin locks will be used in apm_ops.init and EEPROM access
6549          * we should init now
6550          */
6551         spin_lock_init(&il->reg_lock);
6552         spin_lock_init(&il->lock);
6553
6554         /*
6555          * stop and reset the on-board processor just in case it is in a
6556          * strange state ... like being left stranded by a primary kernel
6557          * and this is now the kdump kernel trying to start up
6558          */
6559         _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
6560
6561         il4965_hw_detect(il);
6562         IL_INFO("Detected %s, REV=0x%X\n", il->cfg->name, il->hw_rev);
6563
6564         /* We disable the RETRY_TIMEOUT register (0x41) to keep
6565          * PCI Tx retries from interfering with C3 CPU state */
6566         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
6567
6568         il4965_prepare_card_hw(il);
6569         if (!il->hw_ready) {
6570                 IL_WARN("Failed, HW not ready\n");
6571                 err = -EIO;
6572                 goto out_iounmap;
6573         }
6574
6575         /*****************
6576          * 4. Read EEPROM
6577          *****************/
6578         /* Read the EEPROM */
6579         err = il_eeprom_init(il);
6580         if (err) {
6581                 IL_ERR("Unable to init EEPROM\n");
6582                 goto out_iounmap;
6583         }
6584         err = il4965_eeprom_check_version(il);
6585         if (err)
6586                 goto out_free_eeprom;
6587
6588         /* extract MAC Address */
6589         il4965_eeprom_get_mac(il, il->addresses[0].addr);
6590         D_INFO("MAC address: %pM\n", il->addresses[0].addr);
6591         il->hw->wiphy->addresses = il->addresses;
6592         il->hw->wiphy->n_addresses = 1;
6593
6594         /************************
6595          * 5. Setup HW constants
6596          ************************/
6597         il4965_set_hw_params(il);
6598
6599         /*******************
6600          * 6. Setup il
6601          *******************/
6602
6603         err = il4965_init_drv(il);
6604         if (err)
6605                 goto out_free_eeprom;
6606         /* At this point both hw and il are initialized. */
6607
6608         /********************
6609          * 7. Setup services
6610          ********************/
6611         spin_lock_irqsave(&il->lock, flags);
6612         il_disable_interrupts(il);
6613         spin_unlock_irqrestore(&il->lock, flags);
6614
6615         pci_enable_msi(il->pci_dev);
6616
6617         err = request_irq(il->pci_dev->irq, il_isr, IRQF_SHARED, DRV_NAME, il);
6618         if (err) {
6619                 IL_ERR("Error allocating IRQ %d\n", il->pci_dev->irq);
6620                 goto out_disable_msi;
6621         }
6622
6623         err = il4965_setup_deferred_work(il);
6624         if (err)
6625                 goto out_free_irq;
6626
6627         il4965_setup_handlers(il);
6628
6629         /*********************************************
6630          * 8. Enable interrupts and read RFKILL state
6631          *********************************************/
6632
6633         /* enable rfkill interrupt: hw bug w/a */
6634         pci_read_config_word(il->pci_dev, PCI_COMMAND, &pci_cmd);
6635         if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
6636                 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
6637                 pci_write_config_word(il->pci_dev, PCI_COMMAND, pci_cmd);
6638         }
6639
6640         il_enable_rfkill_int(il);
6641
6642         /* If platform's RF_KILL switch is NOT set to KILL */
6643         if (_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
6644                 clear_bit(S_RFKILL, &il->status);
6645         else
6646                 set_bit(S_RFKILL, &il->status);
6647
6648         wiphy_rfkill_set_hw_state(il->hw->wiphy,
6649                                   test_bit(S_RFKILL, &il->status));
6650
6651         il_power_initialize(il);
6652
6653         init_completion(&il->_4965.firmware_loading_complete);
6654
6655         err = il4965_request_firmware(il, true);
6656         if (err)
6657                 goto out_destroy_workqueue;
6658
6659         return 0;
6660
6661 out_destroy_workqueue:
6662         destroy_workqueue(il->workqueue);
6663         il->workqueue = NULL;
6664 out_free_irq:
6665         free_irq(il->pci_dev->irq, il);
6666 out_disable_msi:
6667         pci_disable_msi(il->pci_dev);
6668         il4965_uninit_drv(il);
6669 out_free_eeprom:
6670         il_eeprom_free(il);
6671 out_iounmap:
6672         iounmap(il->hw_base);
6673 out_pci_release_regions:
6674         pci_release_regions(pdev);
6675 out_pci_disable_device:
6676         pci_disable_device(pdev);
6677 out_ieee80211_free_hw:
6678         ieee80211_free_hw(il->hw);
6679 out:
6680         return err;
6681 }
6682
6683 static void
6684 il4965_pci_remove(struct pci_dev *pdev)
6685 {
6686         struct il_priv *il = pci_get_drvdata(pdev);
6687         unsigned long flags;
6688
6689         if (!il)
6690                 return;
6691
6692         wait_for_completion(&il->_4965.firmware_loading_complete);
6693
6694         D_INFO("*** UNLOAD DRIVER ***\n");
6695
6696         il_dbgfs_unregister(il);
6697         sysfs_remove_group(&pdev->dev.kobj, &il_attribute_group);
6698
6699         /* ieee80211_unregister_hw call wil cause il_mac_stop to
6700          * be called and il4965_down since we are removing the device
6701          * we need to set S_EXIT_PENDING bit.
6702          */
6703         set_bit(S_EXIT_PENDING, &il->status);
6704
6705         il_leds_exit(il);
6706
6707         if (il->mac80211_registered) {
6708                 ieee80211_unregister_hw(il->hw);
6709                 il->mac80211_registered = 0;
6710         } else {
6711                 il4965_down(il);
6712         }
6713
6714         /*
6715          * Make sure device is reset to low power before unloading driver.
6716          * This may be redundant with il4965_down(), but there are paths to
6717          * run il4965_down() without calling apm_ops.stop(), and there are
6718          * paths to avoid running il4965_down() at all before leaving driver.
6719          * This (inexpensive) call *makes sure* device is reset.
6720          */
6721         il_apm_stop(il);
6722
6723         /* make sure we flush any pending irq or
6724          * tasklet for the driver
6725          */
6726         spin_lock_irqsave(&il->lock, flags);
6727         il_disable_interrupts(il);
6728         spin_unlock_irqrestore(&il->lock, flags);
6729
6730         il4965_synchronize_irq(il);
6731
6732         il4965_dealloc_ucode_pci(il);
6733
6734         if (il->rxq.bd)
6735                 il4965_rx_queue_free(il, &il->rxq);
6736         il4965_hw_txq_ctx_free(il);
6737
6738         il_eeprom_free(il);
6739
6740         /*netif_stop_queue(dev); */
6741
6742         /* ieee80211_unregister_hw calls il_mac_stop, which flushes
6743          * il->workqueue... so we can't take down the workqueue
6744          * until now... */
6745         destroy_workqueue(il->workqueue);
6746         il->workqueue = NULL;
6747
6748         free_irq(il->pci_dev->irq, il);
6749         pci_disable_msi(il->pci_dev);
6750         iounmap(il->hw_base);
6751         pci_release_regions(pdev);
6752         pci_disable_device(pdev);
6753
6754         il4965_uninit_drv(il);
6755
6756         dev_kfree_skb(il->beacon_skb);
6757
6758         ieee80211_free_hw(il->hw);
6759 }
6760
6761 /*
6762  * Activate/Deactivate Tx DMA/FIFO channels according tx fifos mask
6763  * must be called under il->lock and mac access
6764  */
6765 void
6766 il4965_txq_set_sched(struct il_priv *il, u32 mask)
6767 {
6768         il_wr_prph(il, IL49_SCD_TXFACT, mask);
6769 }
6770
6771 /*****************************************************************************
6772  *
6773  * driver and module entry point
6774  *
6775  *****************************************************************************/
6776
6777 /* Hardware specific file defines the PCI IDs table for that hardware module */
6778 static const struct pci_device_id il4965_hw_card_ids[] = {
6779         {IL_PCI_DEVICE(0x4229, PCI_ANY_ID, il4965_cfg)},
6780         {IL_PCI_DEVICE(0x4230, PCI_ANY_ID, il4965_cfg)},
6781         {0}
6782 };
6783 MODULE_DEVICE_TABLE(pci, il4965_hw_card_ids);
6784
6785 static struct pci_driver il4965_driver = {
6786         .name = DRV_NAME,
6787         .id_table = il4965_hw_card_ids,
6788         .probe = il4965_pci_probe,
6789         .remove = il4965_pci_remove,
6790         .driver.pm = IL_LEGACY_PM_OPS,
6791 };
6792
6793 static int __init
6794 il4965_init(void)
6795 {
6796
6797         int ret;
6798         pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
6799         pr_info(DRV_COPYRIGHT "\n");
6800
6801         ret = il4965_rate_control_register();
6802         if (ret) {
6803                 pr_err("Unable to register rate control algorithm: %d\n", ret);
6804                 return ret;
6805         }
6806
6807         ret = pci_register_driver(&il4965_driver);
6808         if (ret) {
6809                 pr_err("Unable to initialize PCI module\n");
6810                 goto error_register;
6811         }
6812
6813         return ret;
6814
6815 error_register:
6816         il4965_rate_control_unregister();
6817         return ret;
6818 }
6819
6820 static void __exit
6821 il4965_exit(void)
6822 {
6823         pci_unregister_driver(&il4965_driver);
6824         il4965_rate_control_unregister();
6825 }
6826
6827 module_exit(il4965_exit);
6828 module_init(il4965_init);
6829
6830 #ifdef CONFIG_IWLEGACY_DEBUG
6831 module_param_named(debug, il_debug_level, uint, 0644);
6832 MODULE_PARM_DESC(debug, "debug output mask");
6833 #endif
6834
6835 module_param_named(swcrypto, il4965_mod_params.sw_crypto, int, 0444);
6836 MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])");
6837 module_param_named(queues_num, il4965_mod_params.num_of_queues, int, 0444);
6838 MODULE_PARM_DESC(queues_num, "number of hw queues.");
6839 module_param_named(11n_disable, il4965_mod_params.disable_11n, int, 0444);
6840 MODULE_PARM_DESC(11n_disable, "disable 11n functionality");
6841 module_param_named(amsdu_size_8K, il4965_mod_params.amsdu_size_8K, int, 0444);
6842 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size (default 0 [disabled])");
6843 module_param_named(fw_restart, il4965_mod_params.restart_fw, int, 0444);
6844 MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");
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