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[linux.git] / drivers / net / ethernet / qlogic / netxen / netxen_nic_init.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Copyright (C) 2003 - 2009 NetXen, Inc.
4  * Copyright (C) 2009 - QLogic Corporation.
5  * All rights reserved.
6  */
7
8 #include <linux/netdevice.h>
9 #include <linux/delay.h>
10 #include <linux/slab.h>
11 #include <linux/if_vlan.h>
12 #include <net/checksum.h>
13 #include "netxen_nic.h"
14 #include "netxen_nic_hw.h"
15
16 struct crb_addr_pair {
17         u32 addr;
18         u32 data;
19 };
20
21 #define NETXEN_MAX_CRB_XFORM 60
22 static unsigned int crb_addr_xform[NETXEN_MAX_CRB_XFORM];
23 #define NETXEN_ADDR_ERROR (0xffffffff)
24
25 #define crb_addr_transform(name) \
26         crb_addr_xform[NETXEN_HW_PX_MAP_CRB_##name] = \
27         NETXEN_HW_CRB_HUB_AGT_ADR_##name << 20
28
29 #define NETXEN_NIC_XDMA_RESET 0x8000ff
30
31 static void
32 netxen_post_rx_buffers_nodb(struct netxen_adapter *adapter,
33                 struct nx_host_rds_ring *rds_ring);
34 static int netxen_p3_has_mn(struct netxen_adapter *adapter);
35
36 static void crb_addr_transform_setup(void)
37 {
38         crb_addr_transform(XDMA);
39         crb_addr_transform(TIMR);
40         crb_addr_transform(SRE);
41         crb_addr_transform(SQN3);
42         crb_addr_transform(SQN2);
43         crb_addr_transform(SQN1);
44         crb_addr_transform(SQN0);
45         crb_addr_transform(SQS3);
46         crb_addr_transform(SQS2);
47         crb_addr_transform(SQS1);
48         crb_addr_transform(SQS0);
49         crb_addr_transform(RPMX7);
50         crb_addr_transform(RPMX6);
51         crb_addr_transform(RPMX5);
52         crb_addr_transform(RPMX4);
53         crb_addr_transform(RPMX3);
54         crb_addr_transform(RPMX2);
55         crb_addr_transform(RPMX1);
56         crb_addr_transform(RPMX0);
57         crb_addr_transform(ROMUSB);
58         crb_addr_transform(SN);
59         crb_addr_transform(QMN);
60         crb_addr_transform(QMS);
61         crb_addr_transform(PGNI);
62         crb_addr_transform(PGND);
63         crb_addr_transform(PGN3);
64         crb_addr_transform(PGN2);
65         crb_addr_transform(PGN1);
66         crb_addr_transform(PGN0);
67         crb_addr_transform(PGSI);
68         crb_addr_transform(PGSD);
69         crb_addr_transform(PGS3);
70         crb_addr_transform(PGS2);
71         crb_addr_transform(PGS1);
72         crb_addr_transform(PGS0);
73         crb_addr_transform(PS);
74         crb_addr_transform(PH);
75         crb_addr_transform(NIU);
76         crb_addr_transform(I2Q);
77         crb_addr_transform(EG);
78         crb_addr_transform(MN);
79         crb_addr_transform(MS);
80         crb_addr_transform(CAS2);
81         crb_addr_transform(CAS1);
82         crb_addr_transform(CAS0);
83         crb_addr_transform(CAM);
84         crb_addr_transform(C2C1);
85         crb_addr_transform(C2C0);
86         crb_addr_transform(SMB);
87         crb_addr_transform(OCM0);
88         crb_addr_transform(I2C0);
89 }
90
91 void netxen_release_rx_buffers(struct netxen_adapter *adapter)
92 {
93         struct netxen_recv_context *recv_ctx;
94         struct nx_host_rds_ring *rds_ring;
95         struct netxen_rx_buffer *rx_buf;
96         int i, ring;
97
98         recv_ctx = &adapter->recv_ctx;
99         for (ring = 0; ring < adapter->max_rds_rings; ring++) {
100                 rds_ring = &recv_ctx->rds_rings[ring];
101                 for (i = 0; i < rds_ring->num_desc; ++i) {
102                         rx_buf = &(rds_ring->rx_buf_arr[i]);
103                         if (rx_buf->state == NETXEN_BUFFER_FREE)
104                                 continue;
105                         dma_unmap_single(&adapter->pdev->dev, rx_buf->dma,
106                                          rds_ring->dma_size, DMA_FROM_DEVICE);
107                         if (rx_buf->skb != NULL)
108                                 dev_kfree_skb_any(rx_buf->skb);
109                 }
110         }
111 }
112
113 void netxen_release_tx_buffers(struct netxen_adapter *adapter)
114 {
115         struct netxen_cmd_buffer *cmd_buf;
116         struct netxen_skb_frag *buffrag;
117         int i, j;
118         struct nx_host_tx_ring *tx_ring = adapter->tx_ring;
119
120         spin_lock_bh(&adapter->tx_clean_lock);
121         cmd_buf = tx_ring->cmd_buf_arr;
122         for (i = 0; i < tx_ring->num_desc; i++) {
123                 buffrag = cmd_buf->frag_array;
124                 if (buffrag->dma) {
125                         dma_unmap_single(&adapter->pdev->dev, buffrag->dma,
126                                          buffrag->length, DMA_TO_DEVICE);
127                         buffrag->dma = 0ULL;
128                 }
129                 for (j = 1; j < cmd_buf->frag_count; j++) {
130                         buffrag++;
131                         if (buffrag->dma) {
132                                 dma_unmap_page(&adapter->pdev->dev,
133                                                buffrag->dma, buffrag->length,
134                                                DMA_TO_DEVICE);
135                                 buffrag->dma = 0ULL;
136                         }
137                 }
138                 if (cmd_buf->skb) {
139                         dev_kfree_skb_any(cmd_buf->skb);
140                         cmd_buf->skb = NULL;
141                 }
142                 cmd_buf++;
143         }
144         spin_unlock_bh(&adapter->tx_clean_lock);
145 }
146
147 void netxen_free_sw_resources(struct netxen_adapter *adapter)
148 {
149         struct netxen_recv_context *recv_ctx;
150         struct nx_host_rds_ring *rds_ring;
151         struct nx_host_tx_ring *tx_ring;
152         int ring;
153
154         recv_ctx = &adapter->recv_ctx;
155
156         if (recv_ctx->rds_rings == NULL)
157                 goto skip_rds;
158
159         for (ring = 0; ring < adapter->max_rds_rings; ring++) {
160                 rds_ring = &recv_ctx->rds_rings[ring];
161                 vfree(rds_ring->rx_buf_arr);
162                 rds_ring->rx_buf_arr = NULL;
163         }
164         kfree(recv_ctx->rds_rings);
165
166 skip_rds:
167         if (adapter->tx_ring == NULL)
168                 return;
169
170         tx_ring = adapter->tx_ring;
171         vfree(tx_ring->cmd_buf_arr);
172         kfree(tx_ring);
173         adapter->tx_ring = NULL;
174 }
175
176 int netxen_alloc_sw_resources(struct netxen_adapter *adapter)
177 {
178         struct netxen_recv_context *recv_ctx;
179         struct nx_host_rds_ring *rds_ring;
180         struct nx_host_sds_ring *sds_ring;
181         struct nx_host_tx_ring *tx_ring;
182         struct netxen_rx_buffer *rx_buf;
183         int ring, i;
184
185         struct netxen_cmd_buffer *cmd_buf_arr;
186         struct net_device *netdev = adapter->netdev;
187
188         tx_ring = kzalloc(sizeof(struct nx_host_tx_ring), GFP_KERNEL);
189         if (tx_ring == NULL)
190                 return -ENOMEM;
191
192         adapter->tx_ring = tx_ring;
193
194         tx_ring->num_desc = adapter->num_txd;
195         tx_ring->txq = netdev_get_tx_queue(netdev, 0);
196
197         cmd_buf_arr = vzalloc(TX_BUFF_RINGSIZE(tx_ring));
198         if (cmd_buf_arr == NULL)
199                 goto err_out;
200
201         tx_ring->cmd_buf_arr = cmd_buf_arr;
202
203         recv_ctx = &adapter->recv_ctx;
204
205         rds_ring = kcalloc(adapter->max_rds_rings,
206                            sizeof(struct nx_host_rds_ring), GFP_KERNEL);
207         if (rds_ring == NULL)
208                 goto err_out;
209
210         recv_ctx->rds_rings = rds_ring;
211
212         for (ring = 0; ring < adapter->max_rds_rings; ring++) {
213                 rds_ring = &recv_ctx->rds_rings[ring];
214                 switch (ring) {
215                 case RCV_RING_NORMAL:
216                         rds_ring->num_desc = adapter->num_rxd;
217                         if (adapter->ahw.cut_through) {
218                                 rds_ring->dma_size =
219                                         NX_CT_DEFAULT_RX_BUF_LEN;
220                                 rds_ring->skb_size =
221                                         NX_CT_DEFAULT_RX_BUF_LEN;
222                         } else {
223                                 if (NX_IS_REVISION_P3(adapter->ahw.revision_id))
224                                         rds_ring->dma_size =
225                                                 NX_P3_RX_BUF_MAX_LEN;
226                                 else
227                                         rds_ring->dma_size =
228                                                 NX_P2_RX_BUF_MAX_LEN;
229                                 rds_ring->skb_size =
230                                         rds_ring->dma_size + NET_IP_ALIGN;
231                         }
232                         break;
233
234                 case RCV_RING_JUMBO:
235                         rds_ring->num_desc = adapter->num_jumbo_rxd;
236                         if (NX_IS_REVISION_P3(adapter->ahw.revision_id))
237                                 rds_ring->dma_size =
238                                         NX_P3_RX_JUMBO_BUF_MAX_LEN;
239                         else
240                                 rds_ring->dma_size =
241                                         NX_P2_RX_JUMBO_BUF_MAX_LEN;
242
243                         if (adapter->capabilities & NX_CAP0_HW_LRO)
244                                 rds_ring->dma_size += NX_LRO_BUFFER_EXTRA;
245
246                         rds_ring->skb_size =
247                                 rds_ring->dma_size + NET_IP_ALIGN;
248                         break;
249
250                 case RCV_RING_LRO:
251                         rds_ring->num_desc = adapter->num_lro_rxd;
252                         rds_ring->dma_size = NX_RX_LRO_BUFFER_LENGTH;
253                         rds_ring->skb_size = rds_ring->dma_size + NET_IP_ALIGN;
254                         break;
255
256                 }
257                 rds_ring->rx_buf_arr = vzalloc(RCV_BUFF_RINGSIZE(rds_ring));
258                 if (rds_ring->rx_buf_arr == NULL)
259                         /* free whatever was already allocated */
260                         goto err_out;
261
262                 INIT_LIST_HEAD(&rds_ring->free_list);
263                 /*
264                  * Now go through all of them, set reference handles
265                  * and put them in the queues.
266                  */
267                 rx_buf = rds_ring->rx_buf_arr;
268                 for (i = 0; i < rds_ring->num_desc; i++) {
269                         list_add_tail(&rx_buf->list,
270                                         &rds_ring->free_list);
271                         rx_buf->ref_handle = i;
272                         rx_buf->state = NETXEN_BUFFER_FREE;
273                         rx_buf++;
274                 }
275                 spin_lock_init(&rds_ring->lock);
276         }
277
278         for (ring = 0; ring < adapter->max_sds_rings; ring++) {
279                 sds_ring = &recv_ctx->sds_rings[ring];
280                 sds_ring->irq = adapter->msix_entries[ring].vector;
281                 sds_ring->adapter = adapter;
282                 sds_ring->num_desc = adapter->num_rxd;
283
284                 for (i = 0; i < NUM_RCV_DESC_RINGS; i++)
285                         INIT_LIST_HEAD(&sds_ring->free_list[i]);
286         }
287
288         return 0;
289
290 err_out:
291         netxen_free_sw_resources(adapter);
292         return -ENOMEM;
293 }
294
295 /*
296  * netxen_decode_crb_addr(0 - utility to translate from internal Phantom CRB
297  * address to external PCI CRB address.
298  */
299 static u32 netxen_decode_crb_addr(u32 addr)
300 {
301         int i;
302         u32 base_addr, offset, pci_base;
303
304         crb_addr_transform_setup();
305
306         pci_base = NETXEN_ADDR_ERROR;
307         base_addr = addr & 0xfff00000;
308         offset = addr & 0x000fffff;
309
310         for (i = 0; i < NETXEN_MAX_CRB_XFORM; i++) {
311                 if (crb_addr_xform[i] == base_addr) {
312                         pci_base = i << 20;
313                         break;
314                 }
315         }
316         if (pci_base == NETXEN_ADDR_ERROR)
317                 return pci_base;
318         else
319                 return pci_base + offset;
320 }
321
322 #define NETXEN_MAX_ROM_WAIT_USEC        100
323
324 static int netxen_wait_rom_done(struct netxen_adapter *adapter)
325 {
326         long timeout = 0;
327         long done = 0;
328
329         cond_resched();
330
331         while (done == 0) {
332                 done = NXRD32(adapter, NETXEN_ROMUSB_GLB_STATUS);
333                 done &= 2;
334                 if (++timeout >= NETXEN_MAX_ROM_WAIT_USEC) {
335                         dev_err(&adapter->pdev->dev,
336                                 "Timeout reached  waiting for rom done");
337                         return -EIO;
338                 }
339                 udelay(1);
340         }
341         return 0;
342 }
343
344 static int do_rom_fast_read(struct netxen_adapter *adapter,
345                             int addr, int *valp)
346 {
347         NXWR32(adapter, NETXEN_ROMUSB_ROM_ADDRESS, addr);
348         NXWR32(adapter, NETXEN_ROMUSB_ROM_DUMMY_BYTE_CNT, 0);
349         NXWR32(adapter, NETXEN_ROMUSB_ROM_ABYTE_CNT, 3);
350         NXWR32(adapter, NETXEN_ROMUSB_ROM_INSTR_OPCODE, 0xb);
351         if (netxen_wait_rom_done(adapter)) {
352                 printk("Error waiting for rom done\n");
353                 return -EIO;
354         }
355         /* reset abyte_cnt and dummy_byte_cnt */
356         NXWR32(adapter, NETXEN_ROMUSB_ROM_ABYTE_CNT, 0);
357         udelay(10);
358         NXWR32(adapter, NETXEN_ROMUSB_ROM_DUMMY_BYTE_CNT, 0);
359
360         *valp = NXRD32(adapter, NETXEN_ROMUSB_ROM_RDATA);
361         return 0;
362 }
363
364 static int do_rom_fast_read_words(struct netxen_adapter *adapter, int addr,
365                                   u8 *bytes, size_t size)
366 {
367         int addridx;
368         int ret = 0;
369
370         for (addridx = addr; addridx < (addr + size); addridx += 4) {
371                 int v;
372                 ret = do_rom_fast_read(adapter, addridx, &v);
373                 if (ret != 0)
374                         break;
375                 *(__le32 *)bytes = cpu_to_le32(v);
376                 bytes += 4;
377         }
378
379         return ret;
380 }
381
382 int
383 netxen_rom_fast_read_words(struct netxen_adapter *adapter, int addr,
384                                 u8 *bytes, size_t size)
385 {
386         int ret;
387
388         ret = netxen_rom_lock(adapter);
389         if (ret < 0)
390                 return ret;
391
392         ret = do_rom_fast_read_words(adapter, addr, bytes, size);
393
394         netxen_rom_unlock(adapter);
395         return ret;
396 }
397
398 int netxen_rom_fast_read(struct netxen_adapter *adapter, int addr, int *valp)
399 {
400         int ret;
401
402         if (netxen_rom_lock(adapter) != 0)
403                 return -EIO;
404
405         ret = do_rom_fast_read(adapter, addr, valp);
406         netxen_rom_unlock(adapter);
407         return ret;
408 }
409
410 #define NETXEN_BOARDTYPE                0x4008
411 #define NETXEN_BOARDNUM                 0x400c
412 #define NETXEN_CHIPNUM                  0x4010
413
414 int netxen_pinit_from_rom(struct netxen_adapter *adapter)
415 {
416         int addr, val;
417         int i, n, init_delay = 0;
418         struct crb_addr_pair *buf;
419         unsigned offset;
420         u32 off;
421
422         /* resetall */
423         netxen_rom_lock(adapter);
424         NXWR32(adapter, NETXEN_ROMUSB_GLB_SW_RESET, 0xfeffffff);
425         netxen_rom_unlock(adapter);
426
427         if (NX_IS_REVISION_P3(adapter->ahw.revision_id)) {
428                 if (netxen_rom_fast_read(adapter, 0, &n) != 0 ||
429                         (n != 0xcafecafe) ||
430                         netxen_rom_fast_read(adapter, 4, &n) != 0) {
431                         printk(KERN_ERR "%s: ERROR Reading crb_init area: "
432                                         "n: %08x\n", netxen_nic_driver_name, n);
433                         return -EIO;
434                 }
435                 offset = n & 0xffffU;
436                 n = (n >> 16) & 0xffffU;
437         } else {
438                 if (netxen_rom_fast_read(adapter, 0, &n) != 0 ||
439                         !(n & 0x80000000)) {
440                         printk(KERN_ERR "%s: ERROR Reading crb_init area: "
441                                         "n: %08x\n", netxen_nic_driver_name, n);
442                         return -EIO;
443                 }
444                 offset = 1;
445                 n &= ~0x80000000;
446         }
447
448         if (n >= 1024) {
449                 printk(KERN_ERR "%s:n=0x%x Error! NetXen card flash not"
450                        " initialized.\n", __func__, n);
451                 return -EIO;
452         }
453
454         buf = kcalloc(n, sizeof(struct crb_addr_pair), GFP_KERNEL);
455         if (buf == NULL)
456                 return -ENOMEM;
457
458         for (i = 0; i < n; i++) {
459                 if (netxen_rom_fast_read(adapter, 8*i + 4*offset, &val) != 0 ||
460                 netxen_rom_fast_read(adapter, 8*i + 4*offset + 4, &addr) != 0) {
461                         kfree(buf);
462                         return -EIO;
463                 }
464
465                 buf[i].addr = addr;
466                 buf[i].data = val;
467
468         }
469
470         for (i = 0; i < n; i++) {
471
472                 off = netxen_decode_crb_addr(buf[i].addr);
473                 if (off == NETXEN_ADDR_ERROR) {
474                         printk(KERN_ERR"CRB init value out of range %x\n",
475                                         buf[i].addr);
476                         continue;
477                 }
478                 off += NETXEN_PCI_CRBSPACE;
479
480                 if (off & 1)
481                         continue;
482
483                 /* skipping cold reboot MAGIC */
484                 if (off == NETXEN_CAM_RAM(0x1fc))
485                         continue;
486
487                 if (NX_IS_REVISION_P3(adapter->ahw.revision_id)) {
488                         if (off == (NETXEN_CRB_I2C0 + 0x1c))
489                                 continue;
490                         /* do not reset PCI */
491                         if (off == (ROMUSB_GLB + 0xbc))
492                                 continue;
493                         if (off == (ROMUSB_GLB + 0xa8))
494                                 continue;
495                         if (off == (ROMUSB_GLB + 0xc8)) /* core clock */
496                                 continue;
497                         if (off == (ROMUSB_GLB + 0x24)) /* MN clock */
498                                 continue;
499                         if (off == (ROMUSB_GLB + 0x1c)) /* MS clock */
500                                 continue;
501                         if ((off & 0x0ff00000) == NETXEN_CRB_DDR_NET)
502                                 continue;
503                         if (off == (NETXEN_CRB_PEG_NET_1 + 0x18) &&
504                                 !NX_IS_REVISION_P3P(adapter->ahw.revision_id))
505                                 buf[i].data = 0x1020;
506                         /* skip the function enable register */
507                         if (off == NETXEN_PCIE_REG(PCIE_SETUP_FUNCTION))
508                                 continue;
509                         if (off == NETXEN_PCIE_REG(PCIE_SETUP_FUNCTION2))
510                                 continue;
511                         if ((off & 0x0ff00000) == NETXEN_CRB_SMB)
512                                 continue;
513                 }
514
515                 init_delay = 1;
516                 /* After writing this register, HW needs time for CRB */
517                 /* to quiet down (else crb_window returns 0xffffffff) */
518                 if (off == NETXEN_ROMUSB_GLB_SW_RESET) {
519                         init_delay = 1000;
520                         if (NX_IS_REVISION_P2(adapter->ahw.revision_id)) {
521                                 /* hold xdma in reset also */
522                                 buf[i].data = NETXEN_NIC_XDMA_RESET;
523                                 buf[i].data = 0x8000ff;
524                         }
525                 }
526
527                 NXWR32(adapter, off, buf[i].data);
528
529                 msleep(init_delay);
530         }
531         kfree(buf);
532
533         /* disable_peg_cache_all */
534
535         /* unreset_net_cache */
536         if (NX_IS_REVISION_P2(adapter->ahw.revision_id)) {
537                 val = NXRD32(adapter, NETXEN_ROMUSB_GLB_SW_RESET);
538                 NXWR32(adapter, NETXEN_ROMUSB_GLB_SW_RESET, (val & 0xffffff0f));
539         }
540
541         /* p2dn replyCount */
542         NXWR32(adapter, NETXEN_CRB_PEG_NET_D + 0xec, 0x1e);
543         /* disable_peg_cache 0 */
544         NXWR32(adapter, NETXEN_CRB_PEG_NET_D + 0x4c, 8);
545         /* disable_peg_cache 1 */
546         NXWR32(adapter, NETXEN_CRB_PEG_NET_I + 0x4c, 8);
547
548         /* peg_clr_all */
549
550         /* peg_clr 0 */
551         NXWR32(adapter, NETXEN_CRB_PEG_NET_0 + 0x8, 0);
552         NXWR32(adapter, NETXEN_CRB_PEG_NET_0 + 0xc, 0);
553         /* peg_clr 1 */
554         NXWR32(adapter, NETXEN_CRB_PEG_NET_1 + 0x8, 0);
555         NXWR32(adapter, NETXEN_CRB_PEG_NET_1 + 0xc, 0);
556         /* peg_clr 2 */
557         NXWR32(adapter, NETXEN_CRB_PEG_NET_2 + 0x8, 0);
558         NXWR32(adapter, NETXEN_CRB_PEG_NET_2 + 0xc, 0);
559         /* peg_clr 3 */
560         NXWR32(adapter, NETXEN_CRB_PEG_NET_3 + 0x8, 0);
561         NXWR32(adapter, NETXEN_CRB_PEG_NET_3 + 0xc, 0);
562         return 0;
563 }
564
565 static struct uni_table_desc *nx_get_table_desc(const u8 *unirom, int section)
566 {
567         uint32_t i;
568         struct uni_table_desc *directory = (struct uni_table_desc *) &unirom[0];
569         __le32 entries = cpu_to_le32(directory->num_entries);
570
571         for (i = 0; i < entries; i++) {
572
573                 __le32 offs = cpu_to_le32(directory->findex) +
574                                 (i * cpu_to_le32(directory->entry_size));
575                 __le32 tab_type = cpu_to_le32(*((u32 *)&unirom[offs] + 8));
576
577                 if (tab_type == section)
578                         return (struct uni_table_desc *) &unirom[offs];
579         }
580
581         return NULL;
582 }
583
584 #define QLCNIC_FILEHEADER_SIZE  (14 * 4)
585
586 static int
587 netxen_nic_validate_header(struct netxen_adapter *adapter)
588 {
589         const u8 *unirom = adapter->fw->data;
590         struct uni_table_desc *directory = (struct uni_table_desc *) &unirom[0];
591         u32 fw_file_size = adapter->fw->size;
592         u32 tab_size;
593         __le32 entries;
594         __le32 entry_size;
595
596         if (fw_file_size < QLCNIC_FILEHEADER_SIZE)
597                 return -EINVAL;
598
599         entries = cpu_to_le32(directory->num_entries);
600         entry_size = cpu_to_le32(directory->entry_size);
601         tab_size = cpu_to_le32(directory->findex) + (entries * entry_size);
602
603         if (fw_file_size < tab_size)
604                 return -EINVAL;
605
606         return 0;
607 }
608
609 static int
610 netxen_nic_validate_bootld(struct netxen_adapter *adapter)
611 {
612         struct uni_table_desc *tab_desc;
613         struct uni_data_desc *descr;
614         const u8 *unirom = adapter->fw->data;
615         __le32 idx = cpu_to_le32(*((int *)&unirom[adapter->file_prd_off] +
616                                 NX_UNI_BOOTLD_IDX_OFF));
617         u32 offs;
618         u32 tab_size;
619         u32 data_size;
620
621         tab_desc = nx_get_table_desc(unirom, NX_UNI_DIR_SECT_BOOTLD);
622
623         if (!tab_desc)
624                 return -EINVAL;
625
626         tab_size = cpu_to_le32(tab_desc->findex) +
627                         (cpu_to_le32(tab_desc->entry_size) * (idx + 1));
628
629         if (adapter->fw->size < tab_size)
630                 return -EINVAL;
631
632         offs = cpu_to_le32(tab_desc->findex) +
633                 (cpu_to_le32(tab_desc->entry_size) * (idx));
634         descr = (struct uni_data_desc *)&unirom[offs];
635
636         data_size = cpu_to_le32(descr->findex) + cpu_to_le32(descr->size);
637
638         if (adapter->fw->size < data_size)
639                 return -EINVAL;
640
641         return 0;
642 }
643
644 static int
645 netxen_nic_validate_fw(struct netxen_adapter *adapter)
646 {
647         struct uni_table_desc *tab_desc;
648         struct uni_data_desc *descr;
649         const u8 *unirom = adapter->fw->data;
650         __le32 idx = cpu_to_le32(*((int *)&unirom[adapter->file_prd_off] +
651                                 NX_UNI_FIRMWARE_IDX_OFF));
652         u32 offs;
653         u32 tab_size;
654         u32 data_size;
655
656         tab_desc = nx_get_table_desc(unirom, NX_UNI_DIR_SECT_FW);
657
658         if (!tab_desc)
659                 return -EINVAL;
660
661         tab_size = cpu_to_le32(tab_desc->findex) +
662                         (cpu_to_le32(tab_desc->entry_size) * (idx + 1));
663
664         if (adapter->fw->size < tab_size)
665                 return -EINVAL;
666
667         offs = cpu_to_le32(tab_desc->findex) +
668                 (cpu_to_le32(tab_desc->entry_size) * (idx));
669         descr = (struct uni_data_desc *)&unirom[offs];
670         data_size = cpu_to_le32(descr->findex) + cpu_to_le32(descr->size);
671
672         if (adapter->fw->size < data_size)
673                 return -EINVAL;
674
675         return 0;
676 }
677
678
679 static int
680 netxen_nic_validate_product_offs(struct netxen_adapter *adapter)
681 {
682         struct uni_table_desc *ptab_descr;
683         const u8 *unirom = adapter->fw->data;
684         int mn_present = (NX_IS_REVISION_P2(adapter->ahw.revision_id)) ?
685                         1 : netxen_p3_has_mn(adapter);
686         __le32 entries;
687         __le32 entry_size;
688         u32 tab_size;
689         u32 i;
690
691         ptab_descr = nx_get_table_desc(unirom, NX_UNI_DIR_SECT_PRODUCT_TBL);
692         if (ptab_descr == NULL)
693                 return -EINVAL;
694
695         entries = cpu_to_le32(ptab_descr->num_entries);
696         entry_size = cpu_to_le32(ptab_descr->entry_size);
697         tab_size = cpu_to_le32(ptab_descr->findex) + (entries * entry_size);
698
699         if (adapter->fw->size < tab_size)
700                 return -EINVAL;
701
702 nomn:
703         for (i = 0; i < entries; i++) {
704
705                 __le32 flags, file_chiprev, offs;
706                 u8 chiprev = adapter->ahw.revision_id;
707                 uint32_t flagbit;
708
709                 offs = cpu_to_le32(ptab_descr->findex) +
710                                 (i * cpu_to_le32(ptab_descr->entry_size));
711                 flags = cpu_to_le32(*((int *)&unirom[offs] + NX_UNI_FLAGS_OFF));
712                 file_chiprev = cpu_to_le32(*((int *)&unirom[offs] +
713                                                         NX_UNI_CHIP_REV_OFF));
714
715                 flagbit = mn_present ? 1 : 2;
716
717                 if ((chiprev == file_chiprev) &&
718                                         ((1ULL << flagbit) & flags)) {
719                         adapter->file_prd_off = offs;
720                         return 0;
721                 }
722         }
723
724         if (mn_present && NX_IS_REVISION_P3(adapter->ahw.revision_id)) {
725                 mn_present = 0;
726                 goto nomn;
727         }
728
729         return -EINVAL;
730 }
731
732 static int
733 netxen_nic_validate_unified_romimage(struct netxen_adapter *adapter)
734 {
735         if (netxen_nic_validate_header(adapter)) {
736                 dev_err(&adapter->pdev->dev,
737                                 "unified image: header validation failed\n");
738                 return -EINVAL;
739         }
740
741         if (netxen_nic_validate_product_offs(adapter)) {
742                 dev_err(&adapter->pdev->dev,
743                                 "unified image: product validation failed\n");
744                 return -EINVAL;
745         }
746
747         if (netxen_nic_validate_bootld(adapter)) {
748                 dev_err(&adapter->pdev->dev,
749                                 "unified image: bootld validation failed\n");
750                 return -EINVAL;
751         }
752
753         if (netxen_nic_validate_fw(adapter)) {
754                 dev_err(&adapter->pdev->dev,
755                                 "unified image: firmware validation failed\n");
756                 return -EINVAL;
757         }
758
759         return 0;
760 }
761
762 static struct uni_data_desc *nx_get_data_desc(struct netxen_adapter *adapter,
763                         u32 section, u32 idx_offset)
764 {
765         const u8 *unirom = adapter->fw->data;
766         int idx = cpu_to_le32(*((int *)&unirom[adapter->file_prd_off] +
767                                                                 idx_offset));
768         struct uni_table_desc *tab_desc;
769         __le32 offs;
770
771         tab_desc = nx_get_table_desc(unirom, section);
772
773         if (tab_desc == NULL)
774                 return NULL;
775
776         offs = cpu_to_le32(tab_desc->findex) +
777                         (cpu_to_le32(tab_desc->entry_size) * idx);
778
779         return (struct uni_data_desc *)&unirom[offs];
780 }
781
782 static u8 *
783 nx_get_bootld_offs(struct netxen_adapter *adapter)
784 {
785         u32 offs = NETXEN_BOOTLD_START;
786
787         if (adapter->fw_type == NX_UNIFIED_ROMIMAGE)
788                 offs = cpu_to_le32((nx_get_data_desc(adapter,
789                                         NX_UNI_DIR_SECT_BOOTLD,
790                                         NX_UNI_BOOTLD_IDX_OFF))->findex);
791
792         return (u8 *)&adapter->fw->data[offs];
793 }
794
795 static u8 *
796 nx_get_fw_offs(struct netxen_adapter *adapter)
797 {
798         u32 offs = NETXEN_IMAGE_START;
799
800         if (adapter->fw_type == NX_UNIFIED_ROMIMAGE)
801                 offs = cpu_to_le32((nx_get_data_desc(adapter,
802                                         NX_UNI_DIR_SECT_FW,
803                                         NX_UNI_FIRMWARE_IDX_OFF))->findex);
804
805         return (u8 *)&adapter->fw->data[offs];
806 }
807
808 static __le32
809 nx_get_fw_size(struct netxen_adapter *adapter)
810 {
811         if (adapter->fw_type == NX_UNIFIED_ROMIMAGE)
812                 return cpu_to_le32((nx_get_data_desc(adapter,
813                                         NX_UNI_DIR_SECT_FW,
814                                         NX_UNI_FIRMWARE_IDX_OFF))->size);
815         else
816                 return cpu_to_le32(
817                                 *(u32 *)&adapter->fw->data[NX_FW_SIZE_OFFSET]);
818 }
819
820 static __le32
821 nx_get_fw_version(struct netxen_adapter *adapter)
822 {
823         struct uni_data_desc *fw_data_desc;
824         const struct firmware *fw = adapter->fw;
825         __le32 major, minor, sub;
826         const u8 *ver_str;
827         int i, ret = 0;
828
829         if (adapter->fw_type == NX_UNIFIED_ROMIMAGE) {
830
831                 fw_data_desc = nx_get_data_desc(adapter,
832                                 NX_UNI_DIR_SECT_FW, NX_UNI_FIRMWARE_IDX_OFF);
833                 ver_str = fw->data + cpu_to_le32(fw_data_desc->findex) +
834                                 cpu_to_le32(fw_data_desc->size) - 17;
835
836                 for (i = 0; i < 12; i++) {
837                         if (!strncmp(&ver_str[i], "REV=", 4)) {
838                                 ret = sscanf(&ver_str[i+4], "%u.%u.%u ",
839                                                         &major, &minor, &sub);
840                                 break;
841                         }
842                 }
843
844                 if (ret != 3)
845                         return 0;
846
847                 return major + (minor << 8) + (sub << 16);
848
849         } else
850                 return cpu_to_le32(*(u32 *)&fw->data[NX_FW_VERSION_OFFSET]);
851 }
852
853 static __le32
854 nx_get_bios_version(struct netxen_adapter *adapter)
855 {
856         const struct firmware *fw = adapter->fw;
857         __le32 bios_ver, prd_off = adapter->file_prd_off;
858
859         if (adapter->fw_type == NX_UNIFIED_ROMIMAGE) {
860                 bios_ver = cpu_to_le32(*((u32 *) (&fw->data[prd_off])
861                                                 + NX_UNI_BIOS_VERSION_OFF));
862                 return (bios_ver << 16) + ((bios_ver >> 8) & 0xff00) +
863                                                         (bios_ver >> 24);
864         } else
865                 return cpu_to_le32(*(u32 *)&fw->data[NX_BIOS_VERSION_OFFSET]);
866
867 }
868
869 int
870 netxen_need_fw_reset(struct netxen_adapter *adapter)
871 {
872         u32 count, old_count;
873         u32 val, version, major, minor, build;
874         int i, timeout;
875         u8 fw_type;
876
877         /* NX2031 firmware doesn't support heartbit */
878         if (NX_IS_REVISION_P2(adapter->ahw.revision_id))
879                 return 1;
880
881         if (adapter->need_fw_reset)
882                 return 1;
883
884         /* last attempt had failed */
885         if (NXRD32(adapter, CRB_CMDPEG_STATE) == PHAN_INITIALIZE_FAILED)
886                 return 1;
887
888         old_count = NXRD32(adapter, NETXEN_PEG_ALIVE_COUNTER);
889
890         for (i = 0; i < 10; i++) {
891
892                 timeout = msleep_interruptible(200);
893                 if (timeout) {
894                         NXWR32(adapter, CRB_CMDPEG_STATE,
895                                         PHAN_INITIALIZE_FAILED);
896                         return -EINTR;
897                 }
898
899                 count = NXRD32(adapter, NETXEN_PEG_ALIVE_COUNTER);
900                 if (count != old_count)
901                         break;
902         }
903
904         /* firmware is dead */
905         if (count == old_count)
906                 return 1;
907
908         /* check if we have got newer or different file firmware */
909         if (adapter->fw) {
910
911                 val = nx_get_fw_version(adapter);
912
913                 version = NETXEN_DECODE_VERSION(val);
914
915                 major = NXRD32(adapter, NETXEN_FW_VERSION_MAJOR);
916                 minor = NXRD32(adapter, NETXEN_FW_VERSION_MINOR);
917                 build = NXRD32(adapter, NETXEN_FW_VERSION_SUB);
918
919                 if (version > NETXEN_VERSION_CODE(major, minor, build))
920                         return 1;
921
922                 if (version == NETXEN_VERSION_CODE(major, minor, build) &&
923                         adapter->fw_type != NX_UNIFIED_ROMIMAGE) {
924
925                         val = NXRD32(adapter, NETXEN_MIU_MN_CONTROL);
926                         fw_type = (val & 0x4) ?
927                                 NX_P3_CT_ROMIMAGE : NX_P3_MN_ROMIMAGE;
928
929                         if (adapter->fw_type != fw_type)
930                                 return 1;
931                 }
932         }
933
934         return 0;
935 }
936
937 #define NETXEN_MIN_P3_FW_SUPP   NETXEN_VERSION_CODE(4, 0, 505)
938
939 int
940 netxen_check_flash_fw_compatibility(struct netxen_adapter *adapter)
941 {
942         u32 flash_fw_ver, min_fw_ver;
943
944         if (NX_IS_REVISION_P2(adapter->ahw.revision_id))
945                 return 0;
946
947         if (netxen_rom_fast_read(adapter,
948                         NX_FW_VERSION_OFFSET, (int *)&flash_fw_ver)) {
949                 dev_err(&adapter->pdev->dev, "Unable to read flash fw"
950                         "version\n");
951                 return -EIO;
952         }
953
954         flash_fw_ver = NETXEN_DECODE_VERSION(flash_fw_ver);
955         min_fw_ver = NETXEN_MIN_P3_FW_SUPP;
956         if (flash_fw_ver >= min_fw_ver)
957                 return 0;
958
959         dev_info(&adapter->pdev->dev, "Flash fw[%d.%d.%d] is < min fw supported"
960                 "[4.0.505]. Please update firmware on flash\n",
961                 _major(flash_fw_ver), _minor(flash_fw_ver),
962                 _build(flash_fw_ver));
963         return -EINVAL;
964 }
965
966 static char *fw_name[] = {
967         NX_P2_MN_ROMIMAGE_NAME,
968         NX_P3_CT_ROMIMAGE_NAME,
969         NX_P3_MN_ROMIMAGE_NAME,
970         NX_UNIFIED_ROMIMAGE_NAME,
971         NX_FLASH_ROMIMAGE_NAME,
972 };
973
974 int
975 netxen_load_firmware(struct netxen_adapter *adapter)
976 {
977         u64 *ptr64;
978         u32 i, flashaddr, size;
979         const struct firmware *fw = adapter->fw;
980         struct pci_dev *pdev = adapter->pdev;
981
982         dev_info(&pdev->dev, "loading firmware from %s\n",
983                         fw_name[adapter->fw_type]);
984
985         if (NX_IS_REVISION_P2(adapter->ahw.revision_id))
986                 NXWR32(adapter, NETXEN_ROMUSB_GLB_CAS_RST, 1);
987
988         if (fw) {
989                 __le64 data;
990
991                 size = (NETXEN_IMAGE_START - NETXEN_BOOTLD_START) / 8;
992
993                 ptr64 = (u64 *)nx_get_bootld_offs(adapter);
994                 flashaddr = NETXEN_BOOTLD_START;
995
996                 for (i = 0; i < size; i++) {
997                         data = cpu_to_le64(ptr64[i]);
998
999                         if (adapter->pci_mem_write(adapter, flashaddr, data))
1000                                 return -EIO;
1001
1002                         flashaddr += 8;
1003                 }
1004
1005                 size = (__force u32)nx_get_fw_size(adapter) / 8;
1006
1007                 ptr64 = (u64 *)nx_get_fw_offs(adapter);
1008                 flashaddr = NETXEN_IMAGE_START;
1009
1010                 for (i = 0; i < size; i++) {
1011                         data = cpu_to_le64(ptr64[i]);
1012
1013                         if (adapter->pci_mem_write(adapter,
1014                                                 flashaddr, data))
1015                                 return -EIO;
1016
1017                         flashaddr += 8;
1018                 }
1019
1020                 size = (__force u32)nx_get_fw_size(adapter) % 8;
1021                 if (size) {
1022                         data = cpu_to_le64(ptr64[i]);
1023
1024                         if (adapter->pci_mem_write(adapter,
1025                                                 flashaddr, data))
1026                                 return -EIO;
1027                 }
1028
1029         } else {
1030                 u64 data;
1031                 u32 hi, lo;
1032
1033                 size = (NETXEN_IMAGE_START - NETXEN_BOOTLD_START) / 8;
1034                 flashaddr = NETXEN_BOOTLD_START;
1035
1036                 for (i = 0; i < size; i++) {
1037                         if (netxen_rom_fast_read(adapter,
1038                                         flashaddr, (int *)&lo) != 0)
1039                                 return -EIO;
1040                         if (netxen_rom_fast_read(adapter,
1041                                         flashaddr + 4, (int *)&hi) != 0)
1042                                 return -EIO;
1043
1044                         /* hi, lo are already in host endian byteorder */
1045                         data = (((u64)hi << 32) | lo);
1046
1047                         if (adapter->pci_mem_write(adapter,
1048                                                 flashaddr, data))
1049                                 return -EIO;
1050
1051                         flashaddr += 8;
1052                 }
1053         }
1054         msleep(1);
1055
1056         if (NX_IS_REVISION_P3P(adapter->ahw.revision_id)) {
1057                 NXWR32(adapter, NETXEN_CRB_PEG_NET_0 + 0x18, 0x1020);
1058                 NXWR32(adapter, NETXEN_ROMUSB_GLB_SW_RESET, 0x80001e);
1059         } else if (NX_IS_REVISION_P3(adapter->ahw.revision_id))
1060                 NXWR32(adapter, NETXEN_ROMUSB_GLB_SW_RESET, 0x80001d);
1061         else {
1062                 NXWR32(adapter, NETXEN_ROMUSB_GLB_CHIP_CLK_CTRL, 0x3fff);
1063                 NXWR32(adapter, NETXEN_ROMUSB_GLB_CAS_RST, 0);
1064         }
1065
1066         return 0;
1067 }
1068
1069 static int
1070 netxen_validate_firmware(struct netxen_adapter *adapter)
1071 {
1072         __le32 val;
1073         __le32 flash_fw_ver;
1074         u32 file_fw_ver, min_ver, bios;
1075         struct pci_dev *pdev = adapter->pdev;
1076         const struct firmware *fw = adapter->fw;
1077         u8 fw_type = adapter->fw_type;
1078         u32 crbinit_fix_fw;
1079
1080         if (fw_type == NX_UNIFIED_ROMIMAGE) {
1081                 if (netxen_nic_validate_unified_romimage(adapter))
1082                         return -EINVAL;
1083         } else {
1084                 val = cpu_to_le32(*(u32 *)&fw->data[NX_FW_MAGIC_OFFSET]);
1085                 if ((__force u32)val != NETXEN_BDINFO_MAGIC)
1086                         return -EINVAL;
1087
1088                 if (fw->size < NX_FW_MIN_SIZE)
1089                         return -EINVAL;
1090         }
1091
1092         val = nx_get_fw_version(adapter);
1093
1094         if (NX_IS_REVISION_P3(adapter->ahw.revision_id))
1095                 min_ver = NETXEN_MIN_P3_FW_SUPP;
1096         else
1097                 min_ver = NETXEN_VERSION_CODE(3, 4, 216);
1098
1099         file_fw_ver = NETXEN_DECODE_VERSION(val);
1100
1101         if ((_major(file_fw_ver) > _NETXEN_NIC_LINUX_MAJOR) ||
1102             (file_fw_ver < min_ver)) {
1103                 dev_err(&pdev->dev,
1104                                 "%s: firmware version %d.%d.%d unsupported\n",
1105                 fw_name[fw_type], _major(file_fw_ver), _minor(file_fw_ver),
1106                  _build(file_fw_ver));
1107                 return -EINVAL;
1108         }
1109         val = nx_get_bios_version(adapter);
1110         if (netxen_rom_fast_read(adapter, NX_BIOS_VERSION_OFFSET, (int *)&bios))
1111                 return -EIO;
1112         if ((__force u32)val != bios) {
1113                 dev_err(&pdev->dev, "%s: firmware bios is incompatible\n",
1114                                 fw_name[fw_type]);
1115                 return -EINVAL;
1116         }
1117
1118         if (netxen_rom_fast_read(adapter,
1119                         NX_FW_VERSION_OFFSET, (int *)&flash_fw_ver)) {
1120                 dev_err(&pdev->dev, "Unable to read flash fw version\n");
1121                 return -EIO;
1122         }
1123         flash_fw_ver = NETXEN_DECODE_VERSION(flash_fw_ver);
1124
1125         /* New fw from file is not allowed, if fw on flash is < 4.0.554 */
1126         crbinit_fix_fw = NETXEN_VERSION_CODE(4, 0, 554);
1127         if (file_fw_ver >= crbinit_fix_fw && flash_fw_ver < crbinit_fix_fw &&
1128             NX_IS_REVISION_P3(adapter->ahw.revision_id)) {
1129                 dev_err(&pdev->dev, "Incompatibility detected between driver "
1130                         "and firmware version on flash. This configuration "
1131                         "is not recommended. Please update the firmware on "
1132                         "flash immediately\n");
1133                 return -EINVAL;
1134         }
1135
1136         /* check if flashed firmware is newer only for no-mn and P2 case*/
1137         if (!netxen_p3_has_mn(adapter) ||
1138             NX_IS_REVISION_P2(adapter->ahw.revision_id)) {
1139                 if (flash_fw_ver > file_fw_ver) {
1140                         dev_info(&pdev->dev, "%s: firmware is older than flash\n",
1141                                 fw_name[fw_type]);
1142                         return -EINVAL;
1143                 }
1144         }
1145
1146         NXWR32(adapter, NETXEN_CAM_RAM(0x1fc), NETXEN_BDINFO_MAGIC);
1147         return 0;
1148 }
1149
1150 static void
1151 nx_get_next_fwtype(struct netxen_adapter *adapter)
1152 {
1153         u8 fw_type;
1154
1155         switch (adapter->fw_type) {
1156         case NX_UNKNOWN_ROMIMAGE:
1157                 fw_type = NX_UNIFIED_ROMIMAGE;
1158                 break;
1159
1160         case NX_UNIFIED_ROMIMAGE:
1161                 if (NX_IS_REVISION_P3P(adapter->ahw.revision_id))
1162                         fw_type = NX_FLASH_ROMIMAGE;
1163                 else if (NX_IS_REVISION_P2(adapter->ahw.revision_id))
1164                         fw_type = NX_P2_MN_ROMIMAGE;
1165                 else if (netxen_p3_has_mn(adapter))
1166                         fw_type = NX_P3_MN_ROMIMAGE;
1167                 else
1168                         fw_type = NX_P3_CT_ROMIMAGE;
1169                 break;
1170
1171         case NX_P3_MN_ROMIMAGE:
1172                 fw_type = NX_P3_CT_ROMIMAGE;
1173                 break;
1174
1175         case NX_P2_MN_ROMIMAGE:
1176         case NX_P3_CT_ROMIMAGE:
1177         default:
1178                 fw_type = NX_FLASH_ROMIMAGE;
1179                 break;
1180         }
1181
1182         adapter->fw_type = fw_type;
1183 }
1184
1185 static int
1186 netxen_p3_has_mn(struct netxen_adapter *adapter)
1187 {
1188         u32 capability, flashed_ver;
1189
1190         /* NX2031 always had MN */
1191         if (NX_IS_REVISION_P2(adapter->ahw.revision_id))
1192                 return 1;
1193
1194         netxen_rom_fast_read(adapter,
1195                         NX_FW_VERSION_OFFSET, (int *)&flashed_ver);
1196         flashed_ver = NETXEN_DECODE_VERSION(flashed_ver);
1197
1198         if (flashed_ver >= NETXEN_VERSION_CODE(4, 0, 220)) {
1199                 capability = NXRD32(adapter, NX_PEG_TUNE_CAPABILITY);
1200                 if (capability & NX_PEG_TUNE_MN_PRESENT)
1201                         return 1;
1202         }
1203         return 0;
1204 }
1205
1206 void netxen_request_firmware(struct netxen_adapter *adapter)
1207 {
1208         struct pci_dev *pdev = adapter->pdev;
1209         int rc = 0;
1210
1211         adapter->fw_type = NX_UNKNOWN_ROMIMAGE;
1212
1213 next:
1214         nx_get_next_fwtype(adapter);
1215
1216         if (adapter->fw_type == NX_FLASH_ROMIMAGE) {
1217                 adapter->fw = NULL;
1218         } else {
1219                 rc = request_firmware(&adapter->fw,
1220                                 fw_name[adapter->fw_type], &pdev->dev);
1221                 if (rc != 0)
1222                         goto next;
1223
1224                 rc = netxen_validate_firmware(adapter);
1225                 if (rc != 0) {
1226                         release_firmware(adapter->fw);
1227                         msleep(1);
1228                         goto next;
1229                 }
1230         }
1231 }
1232
1233
1234 void
1235 netxen_release_firmware(struct netxen_adapter *adapter)
1236 {
1237         release_firmware(adapter->fw);
1238         adapter->fw = NULL;
1239 }
1240
1241 int netxen_init_dummy_dma(struct netxen_adapter *adapter)
1242 {
1243         u64 addr;
1244         u32 hi, lo;
1245
1246         if (!NX_IS_REVISION_P2(adapter->ahw.revision_id))
1247                 return 0;
1248
1249         adapter->dummy_dma.addr = dma_alloc_coherent(&adapter->pdev->dev,
1250                                                      NETXEN_HOST_DUMMY_DMA_SIZE,
1251                                                      &adapter->dummy_dma.phys_addr,
1252                                                      GFP_KERNEL);
1253         if (adapter->dummy_dma.addr == NULL) {
1254                 dev_err(&adapter->pdev->dev,
1255                         "ERROR: Could not allocate dummy DMA memory\n");
1256                 return -ENOMEM;
1257         }
1258
1259         addr = (uint64_t) adapter->dummy_dma.phys_addr;
1260         hi = (addr >> 32) & 0xffffffff;
1261         lo = addr & 0xffffffff;
1262
1263         NXWR32(adapter, CRB_HOST_DUMMY_BUF_ADDR_HI, hi);
1264         NXWR32(adapter, CRB_HOST_DUMMY_BUF_ADDR_LO, lo);
1265
1266         return 0;
1267 }
1268
1269 /*
1270  * NetXen DMA watchdog control:
1271  *
1272  *      Bit 0           : enabled => R/O: 1 watchdog active, 0 inactive
1273  *      Bit 1           : disable_request => 1 req disable dma watchdog
1274  *      Bit 2           : enable_request =>  1 req enable dma watchdog
1275  *      Bit 3-31        : unused
1276  */
1277 void netxen_free_dummy_dma(struct netxen_adapter *adapter)
1278 {
1279         int i = 100;
1280         u32 ctrl;
1281
1282         if (!NX_IS_REVISION_P2(adapter->ahw.revision_id))
1283                 return;
1284
1285         if (!adapter->dummy_dma.addr)
1286                 return;
1287
1288         ctrl = NXRD32(adapter, NETXEN_DMA_WATCHDOG_CTRL);
1289         if ((ctrl & 0x1) != 0) {
1290                 NXWR32(adapter, NETXEN_DMA_WATCHDOG_CTRL, (ctrl | 0x2));
1291
1292                 while ((ctrl & 0x1) != 0) {
1293
1294                         msleep(50);
1295
1296                         ctrl = NXRD32(adapter, NETXEN_DMA_WATCHDOG_CTRL);
1297
1298                         if (--i == 0)
1299                                 break;
1300                 }
1301         }
1302
1303         if (i) {
1304                 dma_free_coherent(&adapter->pdev->dev,
1305                                   NETXEN_HOST_DUMMY_DMA_SIZE,
1306                                   adapter->dummy_dma.addr,
1307                                   adapter->dummy_dma.phys_addr);
1308                 adapter->dummy_dma.addr = NULL;
1309         } else
1310                 dev_err(&adapter->pdev->dev, "dma_watchdog_shutdown failed\n");
1311 }
1312
1313 int netxen_phantom_init(struct netxen_adapter *adapter, int pegtune_val)
1314 {
1315         u32 val = 0;
1316         int retries = 60;
1317
1318         if (pegtune_val)
1319                 return 0;
1320
1321         do {
1322                 val = NXRD32(adapter, CRB_CMDPEG_STATE);
1323                 switch (val) {
1324                 case PHAN_INITIALIZE_COMPLETE:
1325                 case PHAN_INITIALIZE_ACK:
1326                         return 0;
1327                 case PHAN_INITIALIZE_FAILED:
1328                         goto out_err;
1329                 default:
1330                         break;
1331                 }
1332
1333                 msleep(500);
1334
1335         } while (--retries);
1336
1337         NXWR32(adapter, CRB_CMDPEG_STATE, PHAN_INITIALIZE_FAILED);
1338
1339 out_err:
1340         dev_warn(&adapter->pdev->dev, "firmware init failed\n");
1341         return -EIO;
1342 }
1343
1344 static int
1345 netxen_receive_peg_ready(struct netxen_adapter *adapter)
1346 {
1347         u32 val = 0;
1348         int retries = 2000;
1349
1350         do {
1351                 val = NXRD32(adapter, CRB_RCVPEG_STATE);
1352
1353                 if (val == PHAN_PEG_RCV_INITIALIZED)
1354                         return 0;
1355
1356                 msleep(10);
1357
1358         } while (--retries);
1359
1360         pr_err("Receive Peg initialization not complete, state: 0x%x.\n", val);
1361         return -EIO;
1362 }
1363
1364 int netxen_init_firmware(struct netxen_adapter *adapter)
1365 {
1366         int err;
1367
1368         err = netxen_receive_peg_ready(adapter);
1369         if (err)
1370                 return err;
1371
1372         NXWR32(adapter, CRB_NIC_CAPABILITIES_HOST, INTR_SCHEME_PERPORT);
1373         NXWR32(adapter, CRB_MPORT_MODE, MPORT_MULTI_FUNCTION_MODE);
1374         NXWR32(adapter, CRB_CMDPEG_STATE, PHAN_INITIALIZE_ACK);
1375
1376         if (NX_IS_REVISION_P2(adapter->ahw.revision_id))
1377                 NXWR32(adapter, CRB_NIC_MSI_MODE_HOST, MSI_MODE_MULTIFUNC);
1378
1379         return err;
1380 }
1381
1382 static void
1383 netxen_handle_linkevent(struct netxen_adapter *adapter, nx_fw_msg_t *msg)
1384 {
1385         u32 cable_OUI;
1386         u16 cable_len;
1387         u16 link_speed;
1388         u8  link_status, module, duplex, autoneg;
1389         struct net_device *netdev = adapter->netdev;
1390
1391         adapter->has_link_events = 1;
1392
1393         cable_OUI = msg->body[1] & 0xffffffff;
1394         cable_len = (msg->body[1] >> 32) & 0xffff;
1395         link_speed = (msg->body[1] >> 48) & 0xffff;
1396
1397         link_status = msg->body[2] & 0xff;
1398         duplex = (msg->body[2] >> 16) & 0xff;
1399         autoneg = (msg->body[2] >> 24) & 0xff;
1400
1401         module = (msg->body[2] >> 8) & 0xff;
1402         if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLE) {
1403                 printk(KERN_INFO "%s: unsupported cable: OUI 0x%x, length %d\n",
1404                                 netdev->name, cable_OUI, cable_len);
1405         } else if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLELEN) {
1406                 printk(KERN_INFO "%s: unsupported cable length %d\n",
1407                                 netdev->name, cable_len);
1408         }
1409
1410         /* update link parameters */
1411         if (duplex == LINKEVENT_FULL_DUPLEX)
1412                 adapter->link_duplex = DUPLEX_FULL;
1413         else
1414                 adapter->link_duplex = DUPLEX_HALF;
1415         adapter->module_type = module;
1416         adapter->link_autoneg = autoneg;
1417         adapter->link_speed = link_speed;
1418
1419         netxen_advert_link_change(adapter, link_status);
1420 }
1421
1422 static void
1423 netxen_handle_fw_message(int desc_cnt, int index,
1424                 struct nx_host_sds_ring *sds_ring)
1425 {
1426         nx_fw_msg_t msg;
1427         struct status_desc *desc;
1428         int i = 0, opcode;
1429
1430         while (desc_cnt > 0 && i < 8) {
1431                 desc = &sds_ring->desc_head[index];
1432                 msg.words[i++] = le64_to_cpu(desc->status_desc_data[0]);
1433                 msg.words[i++] = le64_to_cpu(desc->status_desc_data[1]);
1434
1435                 index = get_next_index(index, sds_ring->num_desc);
1436                 desc_cnt--;
1437         }
1438
1439         opcode = netxen_get_nic_msg_opcode(msg.body[0]);
1440         switch (opcode) {
1441         case NX_NIC_C2H_OPCODE_GET_LINKEVENT_RESPONSE:
1442                 netxen_handle_linkevent(sds_ring->adapter, &msg);
1443                 break;
1444         default:
1445                 break;
1446         }
1447 }
1448
1449 static int
1450 netxen_alloc_rx_skb(struct netxen_adapter *adapter,
1451                 struct nx_host_rds_ring *rds_ring,
1452                 struct netxen_rx_buffer *buffer)
1453 {
1454         struct sk_buff *skb;
1455         dma_addr_t dma;
1456         struct pci_dev *pdev = adapter->pdev;
1457
1458         buffer->skb = netdev_alloc_skb(adapter->netdev, rds_ring->skb_size);
1459         if (!buffer->skb)
1460                 return 1;
1461
1462         skb = buffer->skb;
1463
1464         if (!adapter->ahw.cut_through)
1465                 skb_reserve(skb, 2);
1466
1467         dma = dma_map_single(&pdev->dev, skb->data, rds_ring->dma_size,
1468                              DMA_FROM_DEVICE);
1469
1470         if (dma_mapping_error(&pdev->dev, dma)) {
1471                 dev_kfree_skb_any(skb);
1472                 buffer->skb = NULL;
1473                 return 1;
1474         }
1475
1476         buffer->skb = skb;
1477         buffer->dma = dma;
1478         buffer->state = NETXEN_BUFFER_BUSY;
1479
1480         return 0;
1481 }
1482
1483 static struct sk_buff *netxen_process_rxbuf(struct netxen_adapter *adapter,
1484                 struct nx_host_rds_ring *rds_ring, u16 index, u16 cksum)
1485 {
1486         struct netxen_rx_buffer *buffer;
1487         struct sk_buff *skb;
1488
1489         buffer = &rds_ring->rx_buf_arr[index];
1490
1491         dma_unmap_single(&adapter->pdev->dev, buffer->dma, rds_ring->dma_size,
1492                          DMA_FROM_DEVICE);
1493
1494         skb = buffer->skb;
1495         if (!skb)
1496                 goto no_skb;
1497
1498         if (likely((adapter->netdev->features & NETIF_F_RXCSUM)
1499             && cksum == STATUS_CKSUM_OK)) {
1500                 adapter->stats.csummed++;
1501                 skb->ip_summed = CHECKSUM_UNNECESSARY;
1502         } else
1503                 skb->ip_summed = CHECKSUM_NONE;
1504
1505         buffer->skb = NULL;
1506 no_skb:
1507         buffer->state = NETXEN_BUFFER_FREE;
1508         return skb;
1509 }
1510
1511 static struct netxen_rx_buffer *
1512 netxen_process_rcv(struct netxen_adapter *adapter,
1513                 struct nx_host_sds_ring *sds_ring,
1514                 int ring, u64 sts_data0)
1515 {
1516         struct net_device *netdev = adapter->netdev;
1517         struct netxen_recv_context *recv_ctx = &adapter->recv_ctx;
1518         struct netxen_rx_buffer *buffer;
1519         struct sk_buff *skb;
1520         struct nx_host_rds_ring *rds_ring;
1521         int index, length, cksum, pkt_offset;
1522
1523         if (unlikely(ring >= adapter->max_rds_rings))
1524                 return NULL;
1525
1526         rds_ring = &recv_ctx->rds_rings[ring];
1527
1528         index = netxen_get_sts_refhandle(sts_data0);
1529         if (unlikely(index >= rds_ring->num_desc))
1530                 return NULL;
1531
1532         buffer = &rds_ring->rx_buf_arr[index];
1533
1534         length = netxen_get_sts_totallength(sts_data0);
1535         cksum  = netxen_get_sts_status(sts_data0);
1536         pkt_offset = netxen_get_sts_pkt_offset(sts_data0);
1537
1538         skb = netxen_process_rxbuf(adapter, rds_ring, index, cksum);
1539         if (!skb)
1540                 return buffer;
1541
1542         if (length > rds_ring->skb_size)
1543                 skb_put(skb, rds_ring->skb_size);
1544         else
1545                 skb_put(skb, length);
1546
1547
1548         if (pkt_offset)
1549                 skb_pull(skb, pkt_offset);
1550
1551         skb->protocol = eth_type_trans(skb, netdev);
1552
1553         napi_gro_receive(&sds_ring->napi, skb);
1554
1555         adapter->stats.rx_pkts++;
1556         adapter->stats.rxbytes += length;
1557
1558         return buffer;
1559 }
1560
1561 #define TCP_HDR_SIZE            20
1562 #define TCP_TS_OPTION_SIZE      12
1563 #define TCP_TS_HDR_SIZE         (TCP_HDR_SIZE + TCP_TS_OPTION_SIZE)
1564
1565 static struct netxen_rx_buffer *
1566 netxen_process_lro(struct netxen_adapter *adapter,
1567                 struct nx_host_sds_ring *sds_ring,
1568                 int ring, u64 sts_data0, u64 sts_data1)
1569 {
1570         struct net_device *netdev = adapter->netdev;
1571         struct netxen_recv_context *recv_ctx = &adapter->recv_ctx;
1572         struct netxen_rx_buffer *buffer;
1573         struct sk_buff *skb;
1574         struct nx_host_rds_ring *rds_ring;
1575         struct iphdr *iph;
1576         struct tcphdr *th;
1577         bool push, timestamp;
1578         int l2_hdr_offset, l4_hdr_offset;
1579         int index;
1580         u16 lro_length, length, data_offset;
1581         u32 seq_number;
1582         u8 vhdr_len = 0;
1583
1584         if (unlikely(ring >= adapter->max_rds_rings))
1585                 return NULL;
1586
1587         rds_ring = &recv_ctx->rds_rings[ring];
1588
1589         index = netxen_get_lro_sts_refhandle(sts_data0);
1590         if (unlikely(index >= rds_ring->num_desc))
1591                 return NULL;
1592
1593         buffer = &rds_ring->rx_buf_arr[index];
1594
1595         timestamp = netxen_get_lro_sts_timestamp(sts_data0);
1596         lro_length = netxen_get_lro_sts_length(sts_data0);
1597         l2_hdr_offset = netxen_get_lro_sts_l2_hdr_offset(sts_data0);
1598         l4_hdr_offset = netxen_get_lro_sts_l4_hdr_offset(sts_data0);
1599         push = netxen_get_lro_sts_push_flag(sts_data0);
1600         seq_number = netxen_get_lro_sts_seq_number(sts_data1);
1601
1602         skb = netxen_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1603         if (!skb)
1604                 return buffer;
1605
1606         if (timestamp)
1607                 data_offset = l4_hdr_offset + TCP_TS_HDR_SIZE;
1608         else
1609                 data_offset = l4_hdr_offset + TCP_HDR_SIZE;
1610
1611         skb_put(skb, lro_length + data_offset);
1612
1613         skb_pull(skb, l2_hdr_offset);
1614         skb->protocol = eth_type_trans(skb, netdev);
1615
1616         if (skb->protocol == htons(ETH_P_8021Q))
1617                 vhdr_len = VLAN_HLEN;
1618         iph = (struct iphdr *)(skb->data + vhdr_len);
1619         th = (struct tcphdr *)((skb->data + vhdr_len) + (iph->ihl << 2));
1620
1621         length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1622         csum_replace2(&iph->check, iph->tot_len, htons(length));
1623         iph->tot_len = htons(length);
1624         th->psh = push;
1625         th->seq = htonl(seq_number);
1626
1627         length = skb->len;
1628
1629         if (adapter->flags & NETXEN_FW_MSS_CAP)
1630                 skb_shinfo(skb)->gso_size  =  netxen_get_lro_sts_mss(sts_data1);
1631
1632         netif_receive_skb(skb);
1633
1634         adapter->stats.lro_pkts++;
1635         adapter->stats.rxbytes += length;
1636
1637         return buffer;
1638 }
1639
1640 #define netxen_merge_rx_buffers(list, head) \
1641         do { list_splice_tail_init(list, head); } while (0);
1642
1643 int
1644 netxen_process_rcv_ring(struct nx_host_sds_ring *sds_ring, int max)
1645 {
1646         struct netxen_adapter *adapter = sds_ring->adapter;
1647
1648         struct list_head *cur;
1649
1650         struct status_desc *desc;
1651         struct netxen_rx_buffer *rxbuf;
1652
1653         u32 consumer = sds_ring->consumer;
1654
1655         int count = 0;
1656         u64 sts_data0, sts_data1;
1657         int opcode, ring = 0, desc_cnt;
1658
1659         while (count < max) {
1660                 desc = &sds_ring->desc_head[consumer];
1661                 sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1662
1663                 if (!(sts_data0 & STATUS_OWNER_HOST))
1664                         break;
1665
1666                 desc_cnt = netxen_get_sts_desc_cnt(sts_data0);
1667
1668                 opcode = netxen_get_sts_opcode(sts_data0);
1669
1670                 switch (opcode) {
1671                 case NETXEN_NIC_RXPKT_DESC:
1672                 case NETXEN_OLD_RXPKT_DESC:
1673                 case NETXEN_NIC_SYN_OFFLOAD:
1674                         ring = netxen_get_sts_type(sts_data0);
1675                         rxbuf = netxen_process_rcv(adapter, sds_ring,
1676                                         ring, sts_data0);
1677                         break;
1678                 case NETXEN_NIC_LRO_DESC:
1679                         ring = netxen_get_lro_sts_type(sts_data0);
1680                         sts_data1 = le64_to_cpu(desc->status_desc_data[1]);
1681                         rxbuf = netxen_process_lro(adapter, sds_ring,
1682                                         ring, sts_data0, sts_data1);
1683                         break;
1684                 case NETXEN_NIC_RESPONSE_DESC:
1685                         netxen_handle_fw_message(desc_cnt, consumer, sds_ring);
1686                         goto skip;
1687                 default:
1688                         goto skip;
1689                 }
1690
1691                 WARN_ON(desc_cnt > 1);
1692
1693                 if (rxbuf)
1694                         list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1695
1696 skip:
1697                 for (; desc_cnt > 0; desc_cnt--) {
1698                         desc = &sds_ring->desc_head[consumer];
1699                         desc->status_desc_data[0] =
1700                                 cpu_to_le64(STATUS_OWNER_PHANTOM);
1701                         consumer = get_next_index(consumer, sds_ring->num_desc);
1702                 }
1703                 count++;
1704         }
1705
1706         for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1707                 struct nx_host_rds_ring *rds_ring =
1708                         &adapter->recv_ctx.rds_rings[ring];
1709
1710                 if (!list_empty(&sds_ring->free_list[ring])) {
1711                         list_for_each(cur, &sds_ring->free_list[ring]) {
1712                                 rxbuf = list_entry(cur,
1713                                                 struct netxen_rx_buffer, list);
1714                                 netxen_alloc_rx_skb(adapter, rds_ring, rxbuf);
1715                         }
1716                         spin_lock(&rds_ring->lock);
1717                         netxen_merge_rx_buffers(&sds_ring->free_list[ring],
1718                                                 &rds_ring->free_list);
1719                         spin_unlock(&rds_ring->lock);
1720                 }
1721
1722                 netxen_post_rx_buffers_nodb(adapter, rds_ring);
1723         }
1724
1725         if (count) {
1726                 sds_ring->consumer = consumer;
1727                 NXWRIO(adapter, sds_ring->crb_sts_consumer, consumer);
1728         }
1729
1730         return count;
1731 }
1732
1733 /* Process Command status ring */
1734 int netxen_process_cmd_ring(struct netxen_adapter *adapter)
1735 {
1736         u32 sw_consumer, hw_consumer;
1737         int count = 0, i;
1738         struct netxen_cmd_buffer *buffer;
1739         struct pci_dev *pdev = adapter->pdev;
1740         struct net_device *netdev = adapter->netdev;
1741         struct netxen_skb_frag *frag;
1742         int done = 0;
1743         struct nx_host_tx_ring *tx_ring = adapter->tx_ring;
1744
1745         if (!spin_trylock_bh(&adapter->tx_clean_lock))
1746                 return 1;
1747
1748         sw_consumer = tx_ring->sw_consumer;
1749         hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
1750
1751         while (sw_consumer != hw_consumer) {
1752                 buffer = &tx_ring->cmd_buf_arr[sw_consumer];
1753                 if (buffer->skb) {
1754                         frag = &buffer->frag_array[0];
1755                         dma_unmap_single(&pdev->dev, frag->dma, frag->length,
1756                                          DMA_TO_DEVICE);
1757                         frag->dma = 0ULL;
1758                         for (i = 1; i < buffer->frag_count; i++) {
1759                                 frag++; /* Get the next frag */
1760                                 dma_unmap_page(&pdev->dev, frag->dma,
1761                                                frag->length, DMA_TO_DEVICE);
1762                                 frag->dma = 0ULL;
1763                         }
1764
1765                         adapter->stats.xmitfinished++;
1766                         dev_kfree_skb_any(buffer->skb);
1767                         buffer->skb = NULL;
1768                 }
1769
1770                 sw_consumer = get_next_index(sw_consumer, tx_ring->num_desc);
1771                 if (++count >= MAX_STATUS_HANDLE)
1772                         break;
1773         }
1774
1775         tx_ring->sw_consumer = sw_consumer;
1776
1777         if (count && netif_running(netdev)) {
1778                 smp_mb();
1779
1780                 if (netif_queue_stopped(netdev) && netif_carrier_ok(netdev))
1781                         if (netxen_tx_avail(tx_ring) > TX_STOP_THRESH)
1782                                 netif_wake_queue(netdev);
1783                 adapter->tx_timeo_cnt = 0;
1784         }
1785         /*
1786          * If everything is freed up to consumer then check if the ring is full
1787          * If the ring is full then check if more needs to be freed and
1788          * schedule the call back again.
1789          *
1790          * This happens when there are 2 CPUs. One could be freeing and the
1791          * other filling it. If the ring is full when we get out of here and
1792          * the card has already interrupted the host then the host can miss the
1793          * interrupt.
1794          *
1795          * There is still a possible race condition and the host could miss an
1796          * interrupt. The card has to take care of this.
1797          */
1798         hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
1799         done = (sw_consumer == hw_consumer);
1800         spin_unlock_bh(&adapter->tx_clean_lock);
1801
1802         return done;
1803 }
1804
1805 void
1806 netxen_post_rx_buffers(struct netxen_adapter *adapter, u32 ringid,
1807         struct nx_host_rds_ring *rds_ring)
1808 {
1809         struct rcv_desc *pdesc;
1810         struct netxen_rx_buffer *buffer;
1811         int producer, count = 0;
1812         netxen_ctx_msg msg = 0;
1813         struct list_head *head;
1814
1815         producer = rds_ring->producer;
1816
1817         head = &rds_ring->free_list;
1818         while (!list_empty(head)) {
1819
1820                 buffer = list_entry(head->next, struct netxen_rx_buffer, list);
1821
1822                 if (!buffer->skb) {
1823                         if (netxen_alloc_rx_skb(adapter, rds_ring, buffer))
1824                                 break;
1825                 }
1826
1827                 count++;
1828                 list_del(&buffer->list);
1829
1830                 /* make a rcv descriptor  */
1831                 pdesc = &rds_ring->desc_head[producer];
1832                 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
1833                 pdesc->reference_handle = cpu_to_le16(buffer->ref_handle);
1834                 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
1835
1836                 producer = get_next_index(producer, rds_ring->num_desc);
1837         }
1838
1839         if (count) {
1840                 rds_ring->producer = producer;
1841                 NXWRIO(adapter, rds_ring->crb_rcv_producer,
1842                                 (producer-1) & (rds_ring->num_desc-1));
1843
1844                 if (NX_IS_REVISION_P2(adapter->ahw.revision_id)) {
1845                         /*
1846                          * Write a doorbell msg to tell phanmon of change in
1847                          * receive ring producer
1848                          * Only for firmware version < 4.0.0
1849                          */
1850                         netxen_set_msg_peg_id(msg, NETXEN_RCV_PEG_DB_ID);
1851                         netxen_set_msg_privid(msg);
1852                         netxen_set_msg_count(msg,
1853                                              ((producer - 1) &
1854                                               (rds_ring->num_desc - 1)));
1855                         netxen_set_msg_ctxid(msg, adapter->portnum);
1856                         netxen_set_msg_opcode(msg, NETXEN_RCV_PRODUCER(ringid));
1857                         NXWRIO(adapter, DB_NORMALIZE(adapter,
1858                                         NETXEN_RCV_PRODUCER_OFFSET), msg);
1859                 }
1860         }
1861 }
1862
1863 static void
1864 netxen_post_rx_buffers_nodb(struct netxen_adapter *adapter,
1865                 struct nx_host_rds_ring *rds_ring)
1866 {
1867         struct rcv_desc *pdesc;
1868         struct netxen_rx_buffer *buffer;
1869         int producer, count = 0;
1870         struct list_head *head;
1871
1872         if (!spin_trylock(&rds_ring->lock))
1873                 return;
1874
1875         producer = rds_ring->producer;
1876
1877         head = &rds_ring->free_list;
1878         while (!list_empty(head)) {
1879
1880                 buffer = list_entry(head->next, struct netxen_rx_buffer, list);
1881
1882                 if (!buffer->skb) {
1883                         if (netxen_alloc_rx_skb(adapter, rds_ring, buffer))
1884                                 break;
1885                 }
1886
1887                 count++;
1888                 list_del(&buffer->list);
1889
1890                 /* make a rcv descriptor  */
1891                 pdesc = &rds_ring->desc_head[producer];
1892                 pdesc->reference_handle = cpu_to_le16(buffer->ref_handle);
1893                 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
1894                 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
1895
1896                 producer = get_next_index(producer, rds_ring->num_desc);
1897         }
1898
1899         if (count) {
1900                 rds_ring->producer = producer;
1901                 NXWRIO(adapter, rds_ring->crb_rcv_producer,
1902                                 (producer - 1) & (rds_ring->num_desc - 1));
1903         }
1904         spin_unlock(&rds_ring->lock);
1905 }
1906
1907 void netxen_nic_clear_stats(struct netxen_adapter *adapter)
1908 {
1909         memset(&adapter->stats, 0, sizeof(adapter->stats));
1910 }
1911
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