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