Merge branches 'arm/rockchip', 'arm/exynos', 'arm/smmu', 'x86/vt-d', 'x86/amd', ...
[sfrench/cifs-2.6.git] / drivers / net / ethernet / qlogic / netxen / netxen_nic_init.c
1 /*
2  * Copyright (C) 2003 - 2009 NetXen, Inc.
3  * Copyright (C) 2009 - QLogic Corporation.
4  * All rights reserved.
5  *
6  * This program is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU General Public License
8  * as published by the Free Software Foundation; either version 2
9  * of the License, or (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful, but
12  * WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, see <http://www.gnu.org/licenses/>.
18  *
19  * The full GNU General Public License is included in this distribution
20  * in the file called "COPYING".
21  *
22  */
23
24 #include <linux/netdevice.h>
25 #include <linux/delay.h>
26 #include <linux/slab.h>
27 #include <linux/if_vlan.h>
28 #include <net/checksum.h>
29 #include "netxen_nic.h"
30 #include "netxen_nic_hw.h"
31
32 struct crb_addr_pair {
33         u32 addr;
34         u32 data;
35 };
36
37 #define NETXEN_MAX_CRB_XFORM 60
38 static unsigned int crb_addr_xform[NETXEN_MAX_CRB_XFORM];
39 #define NETXEN_ADDR_ERROR (0xffffffff)
40
41 #define crb_addr_transform(name) \
42         crb_addr_xform[NETXEN_HW_PX_MAP_CRB_##name] = \
43         NETXEN_HW_CRB_HUB_AGT_ADR_##name << 20
44
45 #define NETXEN_NIC_XDMA_RESET 0x8000ff
46
47 static void
48 netxen_post_rx_buffers_nodb(struct netxen_adapter *adapter,
49                 struct nx_host_rds_ring *rds_ring);
50 static int netxen_p3_has_mn(struct netxen_adapter *adapter);
51
52 static void crb_addr_transform_setup(void)
53 {
54         crb_addr_transform(XDMA);
55         crb_addr_transform(TIMR);
56         crb_addr_transform(SRE);
57         crb_addr_transform(SQN3);
58         crb_addr_transform(SQN2);
59         crb_addr_transform(SQN1);
60         crb_addr_transform(SQN0);
61         crb_addr_transform(SQS3);
62         crb_addr_transform(SQS2);
63         crb_addr_transform(SQS1);
64         crb_addr_transform(SQS0);
65         crb_addr_transform(RPMX7);
66         crb_addr_transform(RPMX6);
67         crb_addr_transform(RPMX5);
68         crb_addr_transform(RPMX4);
69         crb_addr_transform(RPMX3);
70         crb_addr_transform(RPMX2);
71         crb_addr_transform(RPMX1);
72         crb_addr_transform(RPMX0);
73         crb_addr_transform(ROMUSB);
74         crb_addr_transform(SN);
75         crb_addr_transform(QMN);
76         crb_addr_transform(QMS);
77         crb_addr_transform(PGNI);
78         crb_addr_transform(PGND);
79         crb_addr_transform(PGN3);
80         crb_addr_transform(PGN2);
81         crb_addr_transform(PGN1);
82         crb_addr_transform(PGN0);
83         crb_addr_transform(PGSI);
84         crb_addr_transform(PGSD);
85         crb_addr_transform(PGS3);
86         crb_addr_transform(PGS2);
87         crb_addr_transform(PGS1);
88         crb_addr_transform(PGS0);
89         crb_addr_transform(PS);
90         crb_addr_transform(PH);
91         crb_addr_transform(NIU);
92         crb_addr_transform(I2Q);
93         crb_addr_transform(EG);
94         crb_addr_transform(MN);
95         crb_addr_transform(MS);
96         crb_addr_transform(CAS2);
97         crb_addr_transform(CAS1);
98         crb_addr_transform(CAS0);
99         crb_addr_transform(CAM);
100         crb_addr_transform(C2C1);
101         crb_addr_transform(C2C0);
102         crb_addr_transform(SMB);
103         crb_addr_transform(OCM0);
104         crb_addr_transform(I2C0);
105 }
106
107 void netxen_release_rx_buffers(struct netxen_adapter *adapter)
108 {
109         struct netxen_recv_context *recv_ctx;
110         struct nx_host_rds_ring *rds_ring;
111         struct netxen_rx_buffer *rx_buf;
112         int i, ring;
113
114         recv_ctx = &adapter->recv_ctx;
115         for (ring = 0; ring < adapter->max_rds_rings; ring++) {
116                 rds_ring = &recv_ctx->rds_rings[ring];
117                 for (i = 0; i < rds_ring->num_desc; ++i) {
118                         rx_buf = &(rds_ring->rx_buf_arr[i]);
119                         if (rx_buf->state == NETXEN_BUFFER_FREE)
120                                 continue;
121                         pci_unmap_single(adapter->pdev,
122                                         rx_buf->dma,
123                                         rds_ring->dma_size,
124                                         PCI_DMA_FROMDEVICE);
125                         if (rx_buf->skb != NULL)
126                                 dev_kfree_skb_any(rx_buf->skb);
127                 }
128         }
129 }
130
131 void netxen_release_tx_buffers(struct netxen_adapter *adapter)
132 {
133         struct netxen_cmd_buffer *cmd_buf;
134         struct netxen_skb_frag *buffrag;
135         int i, j;
136         struct nx_host_tx_ring *tx_ring = adapter->tx_ring;
137
138         spin_lock_bh(&adapter->tx_clean_lock);
139         cmd_buf = tx_ring->cmd_buf_arr;
140         for (i = 0; i < tx_ring->num_desc; i++) {
141                 buffrag = cmd_buf->frag_array;
142                 if (buffrag->dma) {
143                         pci_unmap_single(adapter->pdev, buffrag->dma,
144                                          buffrag->length, PCI_DMA_TODEVICE);
145                         buffrag->dma = 0ULL;
146                 }
147                 for (j = 1; j < cmd_buf->frag_count; j++) {
148                         buffrag++;
149                         if (buffrag->dma) {
150                                 pci_unmap_page(adapter->pdev, buffrag->dma,
151                                                buffrag->length,
152                                                PCI_DMA_TODEVICE);
153                                 buffrag->dma = 0ULL;
154                         }
155                 }
156                 if (cmd_buf->skb) {
157                         dev_kfree_skb_any(cmd_buf->skb);
158                         cmd_buf->skb = NULL;
159                 }
160                 cmd_buf++;
161         }
162         spin_unlock_bh(&adapter->tx_clean_lock);
163 }
164
165 void netxen_free_sw_resources(struct netxen_adapter *adapter)
166 {
167         struct netxen_recv_context *recv_ctx;
168         struct nx_host_rds_ring *rds_ring;
169         struct nx_host_tx_ring *tx_ring;
170         int ring;
171
172         recv_ctx = &adapter->recv_ctx;
173
174         if (recv_ctx->rds_rings == NULL)
175                 goto skip_rds;
176
177         for (ring = 0; ring < adapter->max_rds_rings; ring++) {
178                 rds_ring = &recv_ctx->rds_rings[ring];
179                 vfree(rds_ring->rx_buf_arr);
180                 rds_ring->rx_buf_arr = NULL;
181         }
182         kfree(recv_ctx->rds_rings);
183
184 skip_rds:
185         if (adapter->tx_ring == NULL)
186                 return;
187
188         tx_ring = adapter->tx_ring;
189         vfree(tx_ring->cmd_buf_arr);
190         kfree(tx_ring);
191         adapter->tx_ring = NULL;
192 }
193
194 int netxen_alloc_sw_resources(struct netxen_adapter *adapter)
195 {
196         struct netxen_recv_context *recv_ctx;
197         struct nx_host_rds_ring *rds_ring;
198         struct nx_host_sds_ring *sds_ring;
199         struct nx_host_tx_ring *tx_ring;
200         struct netxen_rx_buffer *rx_buf;
201         int ring, i;
202
203         struct netxen_cmd_buffer *cmd_buf_arr;
204         struct net_device *netdev = adapter->netdev;
205
206         tx_ring = kzalloc(sizeof(struct nx_host_tx_ring), GFP_KERNEL);
207         if (tx_ring == NULL)
208                 return -ENOMEM;
209
210         adapter->tx_ring = tx_ring;
211
212         tx_ring->num_desc = adapter->num_txd;
213         tx_ring->txq = netdev_get_tx_queue(netdev, 0);
214
215         cmd_buf_arr = vzalloc(TX_BUFF_RINGSIZE(tx_ring));
216         if (cmd_buf_arr == NULL)
217                 goto err_out;
218
219         tx_ring->cmd_buf_arr = cmd_buf_arr;
220
221         recv_ctx = &adapter->recv_ctx;
222
223         rds_ring = kcalloc(adapter->max_rds_rings,
224                            sizeof(struct nx_host_rds_ring), GFP_KERNEL);
225         if (rds_ring == NULL)
226                 goto err_out;
227
228         recv_ctx->rds_rings = rds_ring;
229
230         for (ring = 0; ring < adapter->max_rds_rings; ring++) {
231                 rds_ring = &recv_ctx->rds_rings[ring];
232                 switch (ring) {
233                 case RCV_RING_NORMAL:
234                         rds_ring->num_desc = adapter->num_rxd;
235                         if (adapter->ahw.cut_through) {
236                                 rds_ring->dma_size =
237                                         NX_CT_DEFAULT_RX_BUF_LEN;
238                                 rds_ring->skb_size =
239                                         NX_CT_DEFAULT_RX_BUF_LEN;
240                         } else {
241                                 if (NX_IS_REVISION_P3(adapter->ahw.revision_id))
242                                         rds_ring->dma_size =
243                                                 NX_P3_RX_BUF_MAX_LEN;
244                                 else
245                                         rds_ring->dma_size =
246                                                 NX_P2_RX_BUF_MAX_LEN;
247                                 rds_ring->skb_size =
248                                         rds_ring->dma_size + NET_IP_ALIGN;
249                         }
250                         break;
251
252                 case RCV_RING_JUMBO:
253                         rds_ring->num_desc = adapter->num_jumbo_rxd;
254                         if (NX_IS_REVISION_P3(adapter->ahw.revision_id))
255                                 rds_ring->dma_size =
256                                         NX_P3_RX_JUMBO_BUF_MAX_LEN;
257                         else
258                                 rds_ring->dma_size =
259                                         NX_P2_RX_JUMBO_BUF_MAX_LEN;
260
261                         if (adapter->capabilities & NX_CAP0_HW_LRO)
262                                 rds_ring->dma_size += NX_LRO_BUFFER_EXTRA;
263
264                         rds_ring->skb_size =
265                                 rds_ring->dma_size + NET_IP_ALIGN;
266                         break;
267
268                 case RCV_RING_LRO:
269                         rds_ring->num_desc = adapter->num_lro_rxd;
270                         rds_ring->dma_size = NX_RX_LRO_BUFFER_LENGTH;
271                         rds_ring->skb_size = rds_ring->dma_size + NET_IP_ALIGN;
272                         break;
273
274                 }
275                 rds_ring->rx_buf_arr = vzalloc(RCV_BUFF_RINGSIZE(rds_ring));
276                 if (rds_ring->rx_buf_arr == NULL)
277                         /* free whatever was already allocated */
278                         goto err_out;
279
280                 INIT_LIST_HEAD(&rds_ring->free_list);
281                 /*
282                  * Now go through all of them, set reference handles
283                  * and put them in the queues.
284                  */
285                 rx_buf = rds_ring->rx_buf_arr;
286                 for (i = 0; i < rds_ring->num_desc; i++) {
287                         list_add_tail(&rx_buf->list,
288                                         &rds_ring->free_list);
289                         rx_buf->ref_handle = i;
290                         rx_buf->state = NETXEN_BUFFER_FREE;
291                         rx_buf++;
292                 }
293                 spin_lock_init(&rds_ring->lock);
294         }
295
296         for (ring = 0; ring < adapter->max_sds_rings; ring++) {
297                 sds_ring = &recv_ctx->sds_rings[ring];
298                 sds_ring->irq = adapter->msix_entries[ring].vector;
299                 sds_ring->adapter = adapter;
300                 sds_ring->num_desc = adapter->num_rxd;
301
302                 for (i = 0; i < NUM_RCV_DESC_RINGS; i++)
303                         INIT_LIST_HEAD(&sds_ring->free_list[i]);
304         }
305
306         return 0;
307
308 err_out:
309         netxen_free_sw_resources(adapter);
310         return -ENOMEM;
311 }
312
313 /*
314  * netxen_decode_crb_addr(0 - utility to translate from internal Phantom CRB
315  * address to external PCI CRB address.
316  */
317 static u32 netxen_decode_crb_addr(u32 addr)
318 {
319         int i;
320         u32 base_addr, offset, pci_base;
321
322         crb_addr_transform_setup();
323
324         pci_base = NETXEN_ADDR_ERROR;
325         base_addr = addr & 0xfff00000;
326         offset = addr & 0x000fffff;
327
328         for (i = 0; i < NETXEN_MAX_CRB_XFORM; i++) {
329                 if (crb_addr_xform[i] == base_addr) {
330                         pci_base = i << 20;
331                         break;
332                 }
333         }
334         if (pci_base == NETXEN_ADDR_ERROR)
335                 return pci_base;
336         else
337                 return pci_base + offset;
338 }
339
340 #define NETXEN_MAX_ROM_WAIT_USEC        100
341
342 static int netxen_wait_rom_done(struct netxen_adapter *adapter)
343 {
344         long timeout = 0;
345         long done = 0;
346
347         cond_resched();
348
349         while (done == 0) {
350                 done = NXRD32(adapter, NETXEN_ROMUSB_GLB_STATUS);
351                 done &= 2;
352                 if (++timeout >= NETXEN_MAX_ROM_WAIT_USEC) {
353                         dev_err(&adapter->pdev->dev,
354                                 "Timeout reached  waiting for rom done");
355                         return -EIO;
356                 }
357                 udelay(1);
358         }
359         return 0;
360 }
361
362 static int do_rom_fast_read(struct netxen_adapter *adapter,
363                             int addr, int *valp)
364 {
365         NXWR32(adapter, NETXEN_ROMUSB_ROM_ADDRESS, addr);
366         NXWR32(adapter, NETXEN_ROMUSB_ROM_DUMMY_BYTE_CNT, 0);
367         NXWR32(adapter, NETXEN_ROMUSB_ROM_ABYTE_CNT, 3);
368         NXWR32(adapter, NETXEN_ROMUSB_ROM_INSTR_OPCODE, 0xb);
369         if (netxen_wait_rom_done(adapter)) {
370                 printk("Error waiting for rom done\n");
371                 return -EIO;
372         }
373         /* reset abyte_cnt and dummy_byte_cnt */
374         NXWR32(adapter, NETXEN_ROMUSB_ROM_ABYTE_CNT, 0);
375         udelay(10);
376         NXWR32(adapter, NETXEN_ROMUSB_ROM_DUMMY_BYTE_CNT, 0);
377
378         *valp = NXRD32(adapter, NETXEN_ROMUSB_ROM_RDATA);
379         return 0;
380 }
381
382 static int do_rom_fast_read_words(struct netxen_adapter *adapter, int addr,
383                                   u8 *bytes, size_t size)
384 {
385         int addridx;
386         int ret = 0;
387
388         for (addridx = addr; addridx < (addr + size); addridx += 4) {
389                 int v;
390                 ret = do_rom_fast_read(adapter, addridx, &v);
391                 if (ret != 0)
392                         break;
393                 *(__le32 *)bytes = cpu_to_le32(v);
394                 bytes += 4;
395         }
396
397         return ret;
398 }
399
400 int
401 netxen_rom_fast_read_words(struct netxen_adapter *adapter, int addr,
402                                 u8 *bytes, size_t size)
403 {
404         int ret;
405
406         ret = netxen_rom_lock(adapter);
407         if (ret < 0)
408                 return ret;
409
410         ret = do_rom_fast_read_words(adapter, addr, bytes, size);
411
412         netxen_rom_unlock(adapter);
413         return ret;
414 }
415
416 int netxen_rom_fast_read(struct netxen_adapter *adapter, int addr, int *valp)
417 {
418         int ret;
419
420         if (netxen_rom_lock(adapter) != 0)
421                 return -EIO;
422
423         ret = do_rom_fast_read(adapter, addr, valp);
424         netxen_rom_unlock(adapter);
425         return ret;
426 }
427
428 #define NETXEN_BOARDTYPE                0x4008
429 #define NETXEN_BOARDNUM                 0x400c
430 #define NETXEN_CHIPNUM                  0x4010
431
432 int netxen_pinit_from_rom(struct netxen_adapter *adapter)
433 {
434         int addr, val;
435         int i, n, init_delay = 0;
436         struct crb_addr_pair *buf;
437         unsigned offset;
438         u32 off;
439
440         /* resetall */
441         netxen_rom_lock(adapter);
442         NXWR32(adapter, NETXEN_ROMUSB_GLB_SW_RESET, 0xfeffffff);
443         netxen_rom_unlock(adapter);
444
445         if (NX_IS_REVISION_P3(adapter->ahw.revision_id)) {
446                 if (netxen_rom_fast_read(adapter, 0, &n) != 0 ||
447                         (n != 0xcafecafe) ||
448                         netxen_rom_fast_read(adapter, 4, &n) != 0) {
449                         printk(KERN_ERR "%s: ERROR Reading crb_init area: "
450                                         "n: %08x\n", netxen_nic_driver_name, n);
451                         return -EIO;
452                 }
453                 offset = n & 0xffffU;
454                 n = (n >> 16) & 0xffffU;
455         } else {
456                 if (netxen_rom_fast_read(adapter, 0, &n) != 0 ||
457                         !(n & 0x80000000)) {
458                         printk(KERN_ERR "%s: ERROR Reading crb_init area: "
459                                         "n: %08x\n", netxen_nic_driver_name, n);
460                         return -EIO;
461                 }
462                 offset = 1;
463                 n &= ~0x80000000;
464         }
465
466         if (n >= 1024) {
467                 printk(KERN_ERR "%s:n=0x%x Error! NetXen card flash not"
468                        " initialized.\n", __func__, n);
469                 return -EIO;
470         }
471
472         buf = kcalloc(n, sizeof(struct crb_addr_pair), GFP_KERNEL);
473         if (buf == NULL)
474                 return -ENOMEM;
475
476         for (i = 0; i < n; i++) {
477                 if (netxen_rom_fast_read(adapter, 8*i + 4*offset, &val) != 0 ||
478                 netxen_rom_fast_read(adapter, 8*i + 4*offset + 4, &addr) != 0) {
479                         kfree(buf);
480                         return -EIO;
481                 }
482
483                 buf[i].addr = addr;
484                 buf[i].data = val;
485
486         }
487
488         for (i = 0; i < n; i++) {
489
490                 off = netxen_decode_crb_addr(buf[i].addr);
491                 if (off == NETXEN_ADDR_ERROR) {
492                         printk(KERN_ERR"CRB init value out of range %x\n",
493                                         buf[i].addr);
494                         continue;
495                 }
496                 off += NETXEN_PCI_CRBSPACE;
497
498                 if (off & 1)
499                         continue;
500
501                 /* skipping cold reboot MAGIC */
502                 if (off == NETXEN_CAM_RAM(0x1fc))
503                         continue;
504
505                 if (NX_IS_REVISION_P3(adapter->ahw.revision_id)) {
506                         if (off == (NETXEN_CRB_I2C0 + 0x1c))
507                                 continue;
508                         /* do not reset PCI */
509                         if (off == (ROMUSB_GLB + 0xbc))
510                                 continue;
511                         if (off == (ROMUSB_GLB + 0xa8))
512                                 continue;
513                         if (off == (ROMUSB_GLB + 0xc8)) /* core clock */
514                                 continue;
515                         if (off == (ROMUSB_GLB + 0x24)) /* MN clock */
516                                 continue;
517                         if (off == (ROMUSB_GLB + 0x1c)) /* MS clock */
518                                 continue;
519                         if ((off & 0x0ff00000) == NETXEN_CRB_DDR_NET)
520                                 continue;
521                         if (off == (NETXEN_CRB_PEG_NET_1 + 0x18) &&
522                                 !NX_IS_REVISION_P3P(adapter->ahw.revision_id))
523                                 buf[i].data = 0x1020;
524                         /* skip the function enable register */
525                         if (off == NETXEN_PCIE_REG(PCIE_SETUP_FUNCTION))
526                                 continue;
527                         if (off == NETXEN_PCIE_REG(PCIE_SETUP_FUNCTION2))
528                                 continue;
529                         if ((off & 0x0ff00000) == NETXEN_CRB_SMB)
530                                 continue;
531                 }
532
533                 init_delay = 1;
534                 /* After writing this register, HW needs time for CRB */
535                 /* to quiet down (else crb_window returns 0xffffffff) */
536                 if (off == NETXEN_ROMUSB_GLB_SW_RESET) {
537                         init_delay = 1000;
538                         if (NX_IS_REVISION_P2(adapter->ahw.revision_id)) {
539                                 /* hold xdma in reset also */
540                                 buf[i].data = NETXEN_NIC_XDMA_RESET;
541                                 buf[i].data = 0x8000ff;
542                         }
543                 }
544
545                 NXWR32(adapter, off, buf[i].data);
546
547                 msleep(init_delay);
548         }
549         kfree(buf);
550
551         /* disable_peg_cache_all */
552
553         /* unreset_net_cache */
554         if (NX_IS_REVISION_P2(adapter->ahw.revision_id)) {
555                 val = NXRD32(adapter, NETXEN_ROMUSB_GLB_SW_RESET);
556                 NXWR32(adapter, NETXEN_ROMUSB_GLB_SW_RESET, (val & 0xffffff0f));
557         }
558
559         /* p2dn replyCount */
560         NXWR32(adapter, NETXEN_CRB_PEG_NET_D + 0xec, 0x1e);
561         /* disable_peg_cache 0 */
562         NXWR32(adapter, NETXEN_CRB_PEG_NET_D + 0x4c, 8);
563         /* disable_peg_cache 1 */
564         NXWR32(adapter, NETXEN_CRB_PEG_NET_I + 0x4c, 8);
565
566         /* peg_clr_all */
567
568         /* peg_clr 0 */
569         NXWR32(adapter, NETXEN_CRB_PEG_NET_0 + 0x8, 0);
570         NXWR32(adapter, NETXEN_CRB_PEG_NET_0 + 0xc, 0);
571         /* peg_clr 1 */
572         NXWR32(adapter, NETXEN_CRB_PEG_NET_1 + 0x8, 0);
573         NXWR32(adapter, NETXEN_CRB_PEG_NET_1 + 0xc, 0);
574         /* peg_clr 2 */
575         NXWR32(adapter, NETXEN_CRB_PEG_NET_2 + 0x8, 0);
576         NXWR32(adapter, NETXEN_CRB_PEG_NET_2 + 0xc, 0);
577         /* peg_clr 3 */
578         NXWR32(adapter, NETXEN_CRB_PEG_NET_3 + 0x8, 0);
579         NXWR32(adapter, NETXEN_CRB_PEG_NET_3 + 0xc, 0);
580         return 0;
581 }
582
583 static struct uni_table_desc *nx_get_table_desc(const u8 *unirom, int section)
584 {
585         uint32_t i;
586         struct uni_table_desc *directory = (struct uni_table_desc *) &unirom[0];
587         __le32 entries = cpu_to_le32(directory->num_entries);
588
589         for (i = 0; i < entries; i++) {
590
591                 __le32 offs = cpu_to_le32(directory->findex) +
592                                 (i * cpu_to_le32(directory->entry_size));
593                 __le32 tab_type = cpu_to_le32(*((u32 *)&unirom[offs] + 8));
594
595                 if (tab_type == section)
596                         return (struct uni_table_desc *) &unirom[offs];
597         }
598
599         return NULL;
600 }
601
602 #define QLCNIC_FILEHEADER_SIZE  (14 * 4)
603
604 static int
605 netxen_nic_validate_header(struct netxen_adapter *adapter)
606  {
607         const u8 *unirom = adapter->fw->data;
608         struct uni_table_desc *directory = (struct uni_table_desc *) &unirom[0];
609         u32 fw_file_size = adapter->fw->size;
610         u32 tab_size;
611         __le32 entries;
612         __le32 entry_size;
613
614         if (fw_file_size < QLCNIC_FILEHEADER_SIZE)
615                 return -EINVAL;
616
617         entries = cpu_to_le32(directory->num_entries);
618         entry_size = cpu_to_le32(directory->entry_size);
619         tab_size = cpu_to_le32(directory->findex) + (entries * entry_size);
620
621         if (fw_file_size < tab_size)
622                 return -EINVAL;
623
624         return 0;
625 }
626
627 static int
628 netxen_nic_validate_bootld(struct netxen_adapter *adapter)
629 {
630         struct uni_table_desc *tab_desc;
631         struct uni_data_desc *descr;
632         const u8 *unirom = adapter->fw->data;
633         __le32 idx = cpu_to_le32(*((int *)&unirom[adapter->file_prd_off] +
634                                 NX_UNI_BOOTLD_IDX_OFF));
635         u32 offs;
636         u32 tab_size;
637         u32 data_size;
638
639         tab_desc = nx_get_table_desc(unirom, NX_UNI_DIR_SECT_BOOTLD);
640
641         if (!tab_desc)
642                 return -EINVAL;
643
644         tab_size = cpu_to_le32(tab_desc->findex) +
645                         (cpu_to_le32(tab_desc->entry_size) * (idx + 1));
646
647         if (adapter->fw->size < tab_size)
648                 return -EINVAL;
649
650         offs = cpu_to_le32(tab_desc->findex) +
651                 (cpu_to_le32(tab_desc->entry_size) * (idx));
652         descr = (struct uni_data_desc *)&unirom[offs];
653
654         data_size = cpu_to_le32(descr->findex) + cpu_to_le32(descr->size);
655
656         if (adapter->fw->size < data_size)
657                 return -EINVAL;
658
659         return 0;
660 }
661
662 static int
663 netxen_nic_validate_fw(struct netxen_adapter *adapter)
664 {
665         struct uni_table_desc *tab_desc;
666         struct uni_data_desc *descr;
667         const u8 *unirom = adapter->fw->data;
668         __le32 idx = cpu_to_le32(*((int *)&unirom[adapter->file_prd_off] +
669                                 NX_UNI_FIRMWARE_IDX_OFF));
670         u32 offs;
671         u32 tab_size;
672         u32 data_size;
673
674         tab_desc = nx_get_table_desc(unirom, NX_UNI_DIR_SECT_FW);
675
676         if (!tab_desc)
677                 return -EINVAL;
678
679         tab_size = cpu_to_le32(tab_desc->findex) +
680                         (cpu_to_le32(tab_desc->entry_size) * (idx + 1));
681
682         if (adapter->fw->size < tab_size)
683                 return -EINVAL;
684
685         offs = cpu_to_le32(tab_desc->findex) +
686                 (cpu_to_le32(tab_desc->entry_size) * (idx));
687         descr = (struct uni_data_desc *)&unirom[offs];
688         data_size = cpu_to_le32(descr->findex) + cpu_to_le32(descr->size);
689
690         if (adapter->fw->size < data_size)
691                 return -EINVAL;
692
693         return 0;
694 }
695
696
697 static int
698 netxen_nic_validate_product_offs(struct netxen_adapter *adapter)
699 {
700         struct uni_table_desc *ptab_descr;
701         const u8 *unirom = adapter->fw->data;
702         int mn_present = (NX_IS_REVISION_P2(adapter->ahw.revision_id)) ?
703                         1 : netxen_p3_has_mn(adapter);
704         __le32 entries;
705         __le32 entry_size;
706         u32 tab_size;
707         u32 i;
708
709         ptab_descr = nx_get_table_desc(unirom, NX_UNI_DIR_SECT_PRODUCT_TBL);
710         if (ptab_descr == NULL)
711                 return -EINVAL;
712
713         entries = cpu_to_le32(ptab_descr->num_entries);
714         entry_size = cpu_to_le32(ptab_descr->entry_size);
715         tab_size = cpu_to_le32(ptab_descr->findex) + (entries * entry_size);
716
717         if (adapter->fw->size < tab_size)
718                 return -EINVAL;
719
720 nomn:
721         for (i = 0; i < entries; i++) {
722
723                 __le32 flags, file_chiprev, offs;
724                 u8 chiprev = adapter->ahw.revision_id;
725                 uint32_t flagbit;
726
727                 offs = cpu_to_le32(ptab_descr->findex) +
728                                 (i * cpu_to_le32(ptab_descr->entry_size));
729                 flags = cpu_to_le32(*((int *)&unirom[offs] + NX_UNI_FLAGS_OFF));
730                 file_chiprev = cpu_to_le32(*((int *)&unirom[offs] +
731                                                         NX_UNI_CHIP_REV_OFF));
732
733                 flagbit = mn_present ? 1 : 2;
734
735                 if ((chiprev == file_chiprev) &&
736                                         ((1ULL << flagbit) & flags)) {
737                         adapter->file_prd_off = offs;
738                         return 0;
739                 }
740         }
741
742         if (mn_present && NX_IS_REVISION_P3(adapter->ahw.revision_id)) {
743                 mn_present = 0;
744                 goto nomn;
745         }
746
747         return -EINVAL;
748 }
749
750 static int
751 netxen_nic_validate_unified_romimage(struct netxen_adapter *adapter)
752 {
753         if (netxen_nic_validate_header(adapter)) {
754                 dev_err(&adapter->pdev->dev,
755                                 "unified image: header validation failed\n");
756                 return -EINVAL;
757         }
758
759         if (netxen_nic_validate_product_offs(adapter)) {
760                 dev_err(&adapter->pdev->dev,
761                                 "unified image: product validation failed\n");
762                 return -EINVAL;
763         }
764
765         if (netxen_nic_validate_bootld(adapter)) {
766                 dev_err(&adapter->pdev->dev,
767                                 "unified image: bootld validation failed\n");
768                 return -EINVAL;
769         }
770
771         if (netxen_nic_validate_fw(adapter)) {
772                 dev_err(&adapter->pdev->dev,
773                                 "unified image: firmware validation failed\n");
774                 return -EINVAL;
775         }
776
777         return 0;
778 }
779
780 static struct uni_data_desc *nx_get_data_desc(struct netxen_adapter *adapter,
781                         u32 section, u32 idx_offset)
782 {
783         const u8 *unirom = adapter->fw->data;
784         int idx = cpu_to_le32(*((int *)&unirom[adapter->file_prd_off] +
785                                                                 idx_offset));
786         struct uni_table_desc *tab_desc;
787         __le32 offs;
788
789         tab_desc = nx_get_table_desc(unirom, section);
790
791         if (tab_desc == NULL)
792                 return NULL;
793
794         offs = cpu_to_le32(tab_desc->findex) +
795                         (cpu_to_le32(tab_desc->entry_size) * idx);
796
797         return (struct uni_data_desc *)&unirom[offs];
798 }
799
800 static u8 *
801 nx_get_bootld_offs(struct netxen_adapter *adapter)
802 {
803         u32 offs = NETXEN_BOOTLD_START;
804
805         if (adapter->fw_type == NX_UNIFIED_ROMIMAGE)
806                 offs = cpu_to_le32((nx_get_data_desc(adapter,
807                                         NX_UNI_DIR_SECT_BOOTLD,
808                                         NX_UNI_BOOTLD_IDX_OFF))->findex);
809
810         return (u8 *)&adapter->fw->data[offs];
811 }
812
813 static u8 *
814 nx_get_fw_offs(struct netxen_adapter *adapter)
815 {
816         u32 offs = NETXEN_IMAGE_START;
817
818         if (adapter->fw_type == NX_UNIFIED_ROMIMAGE)
819                 offs = cpu_to_le32((nx_get_data_desc(adapter,
820                                         NX_UNI_DIR_SECT_FW,
821                                         NX_UNI_FIRMWARE_IDX_OFF))->findex);
822
823         return (u8 *)&adapter->fw->data[offs];
824 }
825
826 static __le32
827 nx_get_fw_size(struct netxen_adapter *adapter)
828 {
829         if (adapter->fw_type == NX_UNIFIED_ROMIMAGE)
830                 return cpu_to_le32((nx_get_data_desc(adapter,
831                                         NX_UNI_DIR_SECT_FW,
832                                         NX_UNI_FIRMWARE_IDX_OFF))->size);
833         else
834                 return cpu_to_le32(
835                                 *(u32 *)&adapter->fw->data[NX_FW_SIZE_OFFSET]);
836 }
837
838 static __le32
839 nx_get_fw_version(struct netxen_adapter *adapter)
840 {
841         struct uni_data_desc *fw_data_desc;
842         const struct firmware *fw = adapter->fw;
843         __le32 major, minor, sub;
844         const u8 *ver_str;
845         int i, ret = 0;
846
847         if (adapter->fw_type == NX_UNIFIED_ROMIMAGE) {
848
849                 fw_data_desc = nx_get_data_desc(adapter,
850                                 NX_UNI_DIR_SECT_FW, NX_UNI_FIRMWARE_IDX_OFF);
851                 ver_str = fw->data + cpu_to_le32(fw_data_desc->findex) +
852                                 cpu_to_le32(fw_data_desc->size) - 17;
853
854                 for (i = 0; i < 12; i++) {
855                         if (!strncmp(&ver_str[i], "REV=", 4)) {
856                                 ret = sscanf(&ver_str[i+4], "%u.%u.%u ",
857                                                         &major, &minor, &sub);
858                                 break;
859                         }
860                 }
861
862                 if (ret != 3)
863                         return 0;
864
865                 return major + (minor << 8) + (sub << 16);
866
867         } else
868                 return cpu_to_le32(*(u32 *)&fw->data[NX_FW_VERSION_OFFSET]);
869 }
870
871 static __le32
872 nx_get_bios_version(struct netxen_adapter *adapter)
873 {
874         const struct firmware *fw = adapter->fw;
875         __le32 bios_ver, prd_off = adapter->file_prd_off;
876
877         if (adapter->fw_type == NX_UNIFIED_ROMIMAGE) {
878                 bios_ver = cpu_to_le32(*((u32 *) (&fw->data[prd_off])
879                                                 + NX_UNI_BIOS_VERSION_OFF));
880                 return (bios_ver << 16) + ((bios_ver >> 8) & 0xff00) +
881                                                         (bios_ver >> 24);
882         } else
883                 return cpu_to_le32(*(u32 *)&fw->data[NX_BIOS_VERSION_OFFSET]);
884
885 }
886
887 int
888 netxen_need_fw_reset(struct netxen_adapter *adapter)
889 {
890         u32 count, old_count;
891         u32 val, version, major, minor, build;
892         int i, timeout;
893         u8 fw_type;
894
895         /* NX2031 firmware doesn't support heartbit */
896         if (NX_IS_REVISION_P2(adapter->ahw.revision_id))
897                 return 1;
898
899         if (adapter->need_fw_reset)
900                 return 1;
901
902         /* last attempt had failed */
903         if (NXRD32(adapter, CRB_CMDPEG_STATE) == PHAN_INITIALIZE_FAILED)
904                 return 1;
905
906         old_count = NXRD32(adapter, NETXEN_PEG_ALIVE_COUNTER);
907
908         for (i = 0; i < 10; i++) {
909
910                 timeout = msleep_interruptible(200);
911                 if (timeout) {
912                         NXWR32(adapter, CRB_CMDPEG_STATE,
913                                         PHAN_INITIALIZE_FAILED);
914                         return -EINTR;
915                 }
916
917                 count = NXRD32(adapter, NETXEN_PEG_ALIVE_COUNTER);
918                 if (count != old_count)
919                         break;
920         }
921
922         /* firmware is dead */
923         if (count == old_count)
924                 return 1;
925
926         /* check if we have got newer or different file firmware */
927         if (adapter->fw) {
928
929                 val = nx_get_fw_version(adapter);
930
931                 version = NETXEN_DECODE_VERSION(val);
932
933                 major = NXRD32(adapter, NETXEN_FW_VERSION_MAJOR);
934                 minor = NXRD32(adapter, NETXEN_FW_VERSION_MINOR);
935                 build = NXRD32(adapter, NETXEN_FW_VERSION_SUB);
936
937                 if (version > NETXEN_VERSION_CODE(major, minor, build))
938                         return 1;
939
940                 if (version == NETXEN_VERSION_CODE(major, minor, build) &&
941                         adapter->fw_type != NX_UNIFIED_ROMIMAGE) {
942
943                         val = NXRD32(adapter, NETXEN_MIU_MN_CONTROL);
944                         fw_type = (val & 0x4) ?
945                                 NX_P3_CT_ROMIMAGE : NX_P3_MN_ROMIMAGE;
946
947                         if (adapter->fw_type != fw_type)
948                                 return 1;
949                 }
950         }
951
952         return 0;
953 }
954
955 #define NETXEN_MIN_P3_FW_SUPP   NETXEN_VERSION_CODE(4, 0, 505)
956
957 int
958 netxen_check_flash_fw_compatibility(struct netxen_adapter *adapter)
959 {
960         u32 flash_fw_ver, min_fw_ver;
961
962         if (NX_IS_REVISION_P2(adapter->ahw.revision_id))
963                 return 0;
964
965         if (netxen_rom_fast_read(adapter,
966                         NX_FW_VERSION_OFFSET, (int *)&flash_fw_ver)) {
967                 dev_err(&adapter->pdev->dev, "Unable to read flash fw"
968                         "version\n");
969                 return -EIO;
970         }
971
972         flash_fw_ver = NETXEN_DECODE_VERSION(flash_fw_ver);
973         min_fw_ver = NETXEN_MIN_P3_FW_SUPP;
974         if (flash_fw_ver >= min_fw_ver)
975                 return 0;
976
977         dev_info(&adapter->pdev->dev, "Flash fw[%d.%d.%d] is < min fw supported"
978                 "[4.0.505]. Please update firmware on flash\n",
979                 _major(flash_fw_ver), _minor(flash_fw_ver),
980                 _build(flash_fw_ver));
981         return -EINVAL;
982 }
983
984 static char *fw_name[] = {
985         NX_P2_MN_ROMIMAGE_NAME,
986         NX_P3_CT_ROMIMAGE_NAME,
987         NX_P3_MN_ROMIMAGE_NAME,
988         NX_UNIFIED_ROMIMAGE_NAME,
989         NX_FLASH_ROMIMAGE_NAME,
990 };
991
992 int
993 netxen_load_firmware(struct netxen_adapter *adapter)
994 {
995         u64 *ptr64;
996         u32 i, flashaddr, size;
997         const struct firmware *fw = adapter->fw;
998         struct pci_dev *pdev = adapter->pdev;
999
1000         dev_info(&pdev->dev, "loading firmware from %s\n",
1001                         fw_name[adapter->fw_type]);
1002
1003         if (NX_IS_REVISION_P2(adapter->ahw.revision_id))
1004                 NXWR32(adapter, NETXEN_ROMUSB_GLB_CAS_RST, 1);
1005
1006         if (fw) {
1007                 __le64 data;
1008
1009                 size = (NETXEN_IMAGE_START - NETXEN_BOOTLD_START) / 8;
1010
1011                 ptr64 = (u64 *)nx_get_bootld_offs(adapter);
1012                 flashaddr = NETXEN_BOOTLD_START;
1013
1014                 for (i = 0; i < size; i++) {
1015                         data = cpu_to_le64(ptr64[i]);
1016
1017                         if (adapter->pci_mem_write(adapter, flashaddr, data))
1018                                 return -EIO;
1019
1020                         flashaddr += 8;
1021                 }
1022
1023                 size = (__force u32)nx_get_fw_size(adapter) / 8;
1024
1025                 ptr64 = (u64 *)nx_get_fw_offs(adapter);
1026                 flashaddr = NETXEN_IMAGE_START;
1027
1028                 for (i = 0; i < size; i++) {
1029                         data = cpu_to_le64(ptr64[i]);
1030
1031                         if (adapter->pci_mem_write(adapter,
1032                                                 flashaddr, data))
1033                                 return -EIO;
1034
1035                         flashaddr += 8;
1036                 }
1037
1038                 size = (__force u32)nx_get_fw_size(adapter) % 8;
1039                 if (size) {
1040                         data = cpu_to_le64(ptr64[i]);
1041
1042                         if (adapter->pci_mem_write(adapter,
1043                                                 flashaddr, data))
1044                                 return -EIO;
1045                 }
1046
1047         } else {
1048                 u64 data;
1049                 u32 hi, lo;
1050
1051                 size = (NETXEN_IMAGE_START - NETXEN_BOOTLD_START) / 8;
1052                 flashaddr = NETXEN_BOOTLD_START;
1053
1054                 for (i = 0; i < size; i++) {
1055                         if (netxen_rom_fast_read(adapter,
1056                                         flashaddr, (int *)&lo) != 0)
1057                                 return -EIO;
1058                         if (netxen_rom_fast_read(adapter,
1059                                         flashaddr + 4, (int *)&hi) != 0)
1060                                 return -EIO;
1061
1062                         /* hi, lo are already in host endian byteorder */
1063                         data = (((u64)hi << 32) | lo);
1064
1065                         if (adapter->pci_mem_write(adapter,
1066                                                 flashaddr, data))
1067                                 return -EIO;
1068
1069                         flashaddr += 8;
1070                 }
1071         }
1072         msleep(1);
1073
1074         if (NX_IS_REVISION_P3P(adapter->ahw.revision_id)) {
1075                 NXWR32(adapter, NETXEN_CRB_PEG_NET_0 + 0x18, 0x1020);
1076                 NXWR32(adapter, NETXEN_ROMUSB_GLB_SW_RESET, 0x80001e);
1077         } else if (NX_IS_REVISION_P3(adapter->ahw.revision_id))
1078                 NXWR32(adapter, NETXEN_ROMUSB_GLB_SW_RESET, 0x80001d);
1079         else {
1080                 NXWR32(adapter, NETXEN_ROMUSB_GLB_CHIP_CLK_CTRL, 0x3fff);
1081                 NXWR32(adapter, NETXEN_ROMUSB_GLB_CAS_RST, 0);
1082         }
1083
1084         return 0;
1085 }
1086
1087 static int
1088 netxen_validate_firmware(struct netxen_adapter *adapter)
1089 {
1090         __le32 val;
1091         __le32 flash_fw_ver;
1092         u32 file_fw_ver, min_ver, bios;
1093         struct pci_dev *pdev = adapter->pdev;
1094         const struct firmware *fw = adapter->fw;
1095         u8 fw_type = adapter->fw_type;
1096         u32 crbinit_fix_fw;
1097
1098         if (fw_type == NX_UNIFIED_ROMIMAGE) {
1099                 if (netxen_nic_validate_unified_romimage(adapter))
1100                         return -EINVAL;
1101         } else {
1102                 val = cpu_to_le32(*(u32 *)&fw->data[NX_FW_MAGIC_OFFSET]);
1103                 if ((__force u32)val != NETXEN_BDINFO_MAGIC)
1104                         return -EINVAL;
1105
1106                 if (fw->size < NX_FW_MIN_SIZE)
1107                         return -EINVAL;
1108         }
1109
1110         val = nx_get_fw_version(adapter);
1111
1112         if (NX_IS_REVISION_P3(adapter->ahw.revision_id))
1113                 min_ver = NETXEN_MIN_P3_FW_SUPP;
1114         else
1115                 min_ver = NETXEN_VERSION_CODE(3, 4, 216);
1116
1117         file_fw_ver = NETXEN_DECODE_VERSION(val);
1118
1119         if ((_major(file_fw_ver) > _NETXEN_NIC_LINUX_MAJOR) ||
1120             (file_fw_ver < min_ver)) {
1121                 dev_err(&pdev->dev,
1122                                 "%s: firmware version %d.%d.%d unsupported\n",
1123                 fw_name[fw_type], _major(file_fw_ver), _minor(file_fw_ver),
1124                  _build(file_fw_ver));
1125                 return -EINVAL;
1126         }
1127         val = nx_get_bios_version(adapter);
1128         netxen_rom_fast_read(adapter, NX_BIOS_VERSION_OFFSET, (int *)&bios);
1129         if ((__force u32)val != bios) {
1130                 dev_err(&pdev->dev, "%s: firmware bios is incompatible\n",
1131                                 fw_name[fw_type]);
1132                 return -EINVAL;
1133         }
1134
1135         if (netxen_rom_fast_read(adapter,
1136                         NX_FW_VERSION_OFFSET, (int *)&flash_fw_ver)) {
1137                 dev_err(&pdev->dev, "Unable to read flash fw version\n");
1138                 return -EIO;
1139         }
1140         flash_fw_ver = NETXEN_DECODE_VERSION(flash_fw_ver);
1141
1142         /* New fw from file is not allowed, if fw on flash is < 4.0.554 */
1143         crbinit_fix_fw = NETXEN_VERSION_CODE(4, 0, 554);
1144         if (file_fw_ver >= crbinit_fix_fw && flash_fw_ver < crbinit_fix_fw &&
1145             NX_IS_REVISION_P3(adapter->ahw.revision_id)) {
1146                 dev_err(&pdev->dev, "Incompatibility detected between driver "
1147                         "and firmware version on flash. This configuration "
1148                         "is not recommended. Please update the firmware on "
1149                         "flash immediately\n");
1150                 return -EINVAL;
1151         }
1152
1153         /* check if flashed firmware is newer only for no-mn and P2 case*/
1154         if (!netxen_p3_has_mn(adapter) ||
1155             NX_IS_REVISION_P2(adapter->ahw.revision_id)) {
1156                 if (flash_fw_ver > file_fw_ver) {
1157                         dev_info(&pdev->dev, "%s: firmware is older than flash\n",
1158                                 fw_name[fw_type]);
1159                         return -EINVAL;
1160                 }
1161         }
1162
1163         NXWR32(adapter, NETXEN_CAM_RAM(0x1fc), NETXEN_BDINFO_MAGIC);
1164         return 0;
1165 }
1166
1167 static void
1168 nx_get_next_fwtype(struct netxen_adapter *adapter)
1169 {
1170         u8 fw_type;
1171
1172         switch (adapter->fw_type) {
1173         case NX_UNKNOWN_ROMIMAGE:
1174                 fw_type = NX_UNIFIED_ROMIMAGE;
1175                 break;
1176
1177         case NX_UNIFIED_ROMIMAGE:
1178                 if (NX_IS_REVISION_P3P(adapter->ahw.revision_id))
1179                         fw_type = NX_FLASH_ROMIMAGE;
1180                 else if (NX_IS_REVISION_P2(adapter->ahw.revision_id))
1181                         fw_type = NX_P2_MN_ROMIMAGE;
1182                 else if (netxen_p3_has_mn(adapter))
1183                         fw_type = NX_P3_MN_ROMIMAGE;
1184                 else
1185                         fw_type = NX_P3_CT_ROMIMAGE;
1186                 break;
1187
1188         case NX_P3_MN_ROMIMAGE:
1189                 fw_type = NX_P3_CT_ROMIMAGE;
1190                 break;
1191
1192         case NX_P2_MN_ROMIMAGE:
1193         case NX_P3_CT_ROMIMAGE:
1194         default:
1195                 fw_type = NX_FLASH_ROMIMAGE;
1196                 break;
1197         }
1198
1199         adapter->fw_type = fw_type;
1200 }
1201
1202 static int
1203 netxen_p3_has_mn(struct netxen_adapter *adapter)
1204 {
1205         u32 capability, flashed_ver;
1206         capability = 0;
1207
1208         /* NX2031 always had MN */
1209         if (NX_IS_REVISION_P2(adapter->ahw.revision_id))
1210                 return 1;
1211
1212         netxen_rom_fast_read(adapter,
1213                         NX_FW_VERSION_OFFSET, (int *)&flashed_ver);
1214         flashed_ver = NETXEN_DECODE_VERSION(flashed_ver);
1215
1216         if (flashed_ver >= NETXEN_VERSION_CODE(4, 0, 220)) {
1217
1218                 capability = NXRD32(adapter, NX_PEG_TUNE_CAPABILITY);
1219                 if (capability & NX_PEG_TUNE_MN_PRESENT)
1220                         return 1;
1221         }
1222         return 0;
1223 }
1224
1225 void netxen_request_firmware(struct netxen_adapter *adapter)
1226 {
1227         struct pci_dev *pdev = adapter->pdev;
1228         int rc = 0;
1229
1230         adapter->fw_type = NX_UNKNOWN_ROMIMAGE;
1231
1232 next:
1233         nx_get_next_fwtype(adapter);
1234
1235         if (adapter->fw_type == NX_FLASH_ROMIMAGE) {
1236                 adapter->fw = NULL;
1237         } else {
1238                 rc = request_firmware(&adapter->fw,
1239                                 fw_name[adapter->fw_type], &pdev->dev);
1240                 if (rc != 0)
1241                         goto next;
1242
1243                 rc = netxen_validate_firmware(adapter);
1244                 if (rc != 0) {
1245                         release_firmware(adapter->fw);
1246                         msleep(1);
1247                         goto next;
1248                 }
1249         }
1250 }
1251
1252
1253 void
1254 netxen_release_firmware(struct netxen_adapter *adapter)
1255 {
1256         release_firmware(adapter->fw);
1257         adapter->fw = NULL;
1258 }
1259
1260 int netxen_init_dummy_dma(struct netxen_adapter *adapter)
1261 {
1262         u64 addr;
1263         u32 hi, lo;
1264
1265         if (!NX_IS_REVISION_P2(adapter->ahw.revision_id))
1266                 return 0;
1267
1268         adapter->dummy_dma.addr = pci_alloc_consistent(adapter->pdev,
1269                                  NETXEN_HOST_DUMMY_DMA_SIZE,
1270                                  &adapter->dummy_dma.phys_addr);
1271         if (adapter->dummy_dma.addr == NULL) {
1272                 dev_err(&adapter->pdev->dev,
1273                         "ERROR: Could not allocate dummy DMA memory\n");
1274                 return -ENOMEM;
1275         }
1276
1277         addr = (uint64_t) adapter->dummy_dma.phys_addr;
1278         hi = (addr >> 32) & 0xffffffff;
1279         lo = addr & 0xffffffff;
1280
1281         NXWR32(adapter, CRB_HOST_DUMMY_BUF_ADDR_HI, hi);
1282         NXWR32(adapter, CRB_HOST_DUMMY_BUF_ADDR_LO, lo);
1283
1284         return 0;
1285 }
1286
1287 /*
1288  * NetXen DMA watchdog control:
1289  *
1290  *      Bit 0           : enabled => R/O: 1 watchdog active, 0 inactive
1291  *      Bit 1           : disable_request => 1 req disable dma watchdog
1292  *      Bit 2           : enable_request =>  1 req enable dma watchdog
1293  *      Bit 3-31        : unused
1294  */
1295 void netxen_free_dummy_dma(struct netxen_adapter *adapter)
1296 {
1297         int i = 100;
1298         u32 ctrl;
1299
1300         if (!NX_IS_REVISION_P2(adapter->ahw.revision_id))
1301                 return;
1302
1303         if (!adapter->dummy_dma.addr)
1304                 return;
1305
1306         ctrl = NXRD32(adapter, NETXEN_DMA_WATCHDOG_CTRL);
1307         if ((ctrl & 0x1) != 0) {
1308                 NXWR32(adapter, NETXEN_DMA_WATCHDOG_CTRL, (ctrl | 0x2));
1309
1310                 while ((ctrl & 0x1) != 0) {
1311
1312                         msleep(50);
1313
1314                         ctrl = NXRD32(adapter, NETXEN_DMA_WATCHDOG_CTRL);
1315
1316                         if (--i == 0)
1317                                 break;
1318                 }
1319         }
1320
1321         if (i) {
1322                 pci_free_consistent(adapter->pdev,
1323                             NETXEN_HOST_DUMMY_DMA_SIZE,
1324                             adapter->dummy_dma.addr,
1325                             adapter->dummy_dma.phys_addr);
1326                 adapter->dummy_dma.addr = NULL;
1327         } else
1328                 dev_err(&adapter->pdev->dev, "dma_watchdog_shutdown failed\n");
1329 }
1330
1331 int netxen_phantom_init(struct netxen_adapter *adapter, int pegtune_val)
1332 {
1333         u32 val = 0;
1334         int retries = 60;
1335
1336         if (pegtune_val)
1337                 return 0;
1338
1339         do {
1340                 val = NXRD32(adapter, CRB_CMDPEG_STATE);
1341                 switch (val) {
1342                 case PHAN_INITIALIZE_COMPLETE:
1343                 case PHAN_INITIALIZE_ACK:
1344                         return 0;
1345                 case PHAN_INITIALIZE_FAILED:
1346                         goto out_err;
1347                 default:
1348                         break;
1349                 }
1350
1351                 msleep(500);
1352
1353         } while (--retries);
1354
1355         NXWR32(adapter, CRB_CMDPEG_STATE, PHAN_INITIALIZE_FAILED);
1356
1357 out_err:
1358         dev_warn(&adapter->pdev->dev, "firmware init failed\n");
1359         return -EIO;
1360 }
1361
1362 static int
1363 netxen_receive_peg_ready(struct netxen_adapter *adapter)
1364 {
1365         u32 val = 0;
1366         int retries = 2000;
1367
1368         do {
1369                 val = NXRD32(adapter, CRB_RCVPEG_STATE);
1370
1371                 if (val == PHAN_PEG_RCV_INITIALIZED)
1372                         return 0;
1373
1374                 msleep(10);
1375
1376         } while (--retries);
1377
1378         if (!retries) {
1379                 printk(KERN_ERR "Receive Peg initialization not "
1380                               "complete, state: 0x%x.\n", val);
1381                 return -EIO;
1382         }
1383
1384         return 0;
1385 }
1386
1387 int netxen_init_firmware(struct netxen_adapter *adapter)
1388 {
1389         int err;
1390
1391         err = netxen_receive_peg_ready(adapter);
1392         if (err)
1393                 return err;
1394
1395         NXWR32(adapter, CRB_NIC_CAPABILITIES_HOST, INTR_SCHEME_PERPORT);
1396         NXWR32(adapter, CRB_MPORT_MODE, MPORT_MULTI_FUNCTION_MODE);
1397         NXWR32(adapter, CRB_CMDPEG_STATE, PHAN_INITIALIZE_ACK);
1398
1399         if (NX_IS_REVISION_P2(adapter->ahw.revision_id))
1400                 NXWR32(adapter, CRB_NIC_MSI_MODE_HOST, MSI_MODE_MULTIFUNC);
1401
1402         return err;
1403 }
1404
1405 static void
1406 netxen_handle_linkevent(struct netxen_adapter *adapter, nx_fw_msg_t *msg)
1407 {
1408         u32 cable_OUI;
1409         u16 cable_len;
1410         u16 link_speed;
1411         u8  link_status, module, duplex, autoneg;
1412         struct net_device *netdev = adapter->netdev;
1413
1414         adapter->has_link_events = 1;
1415
1416         cable_OUI = msg->body[1] & 0xffffffff;
1417         cable_len = (msg->body[1] >> 32) & 0xffff;
1418         link_speed = (msg->body[1] >> 48) & 0xffff;
1419
1420         link_status = msg->body[2] & 0xff;
1421         duplex = (msg->body[2] >> 16) & 0xff;
1422         autoneg = (msg->body[2] >> 24) & 0xff;
1423
1424         module = (msg->body[2] >> 8) & 0xff;
1425         if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLE) {
1426                 printk(KERN_INFO "%s: unsupported cable: OUI 0x%x, length %d\n",
1427                                 netdev->name, cable_OUI, cable_len);
1428         } else if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLELEN) {
1429                 printk(KERN_INFO "%s: unsupported cable length %d\n",
1430                                 netdev->name, cable_len);
1431         }
1432
1433         /* update link parameters */
1434         if (duplex == LINKEVENT_FULL_DUPLEX)
1435                 adapter->link_duplex = DUPLEX_FULL;
1436         else
1437                 adapter->link_duplex = DUPLEX_HALF;
1438         adapter->module_type = module;
1439         adapter->link_autoneg = autoneg;
1440         adapter->link_speed = link_speed;
1441
1442         netxen_advert_link_change(adapter, link_status);
1443 }
1444
1445 static void
1446 netxen_handle_fw_message(int desc_cnt, int index,
1447                 struct nx_host_sds_ring *sds_ring)
1448 {
1449         nx_fw_msg_t msg;
1450         struct status_desc *desc;
1451         int i = 0, opcode;
1452
1453         while (desc_cnt > 0 && i < 8) {
1454                 desc = &sds_ring->desc_head[index];
1455                 msg.words[i++] = le64_to_cpu(desc->status_desc_data[0]);
1456                 msg.words[i++] = le64_to_cpu(desc->status_desc_data[1]);
1457
1458                 index = get_next_index(index, sds_ring->num_desc);
1459                 desc_cnt--;
1460         }
1461
1462         opcode = netxen_get_nic_msg_opcode(msg.body[0]);
1463         switch (opcode) {
1464         case NX_NIC_C2H_OPCODE_GET_LINKEVENT_RESPONSE:
1465                 netxen_handle_linkevent(sds_ring->adapter, &msg);
1466                 break;
1467         default:
1468                 break;
1469         }
1470 }
1471
1472 static int
1473 netxen_alloc_rx_skb(struct netxen_adapter *adapter,
1474                 struct nx_host_rds_ring *rds_ring,
1475                 struct netxen_rx_buffer *buffer)
1476 {
1477         struct sk_buff *skb;
1478         dma_addr_t dma;
1479         struct pci_dev *pdev = adapter->pdev;
1480
1481         buffer->skb = netdev_alloc_skb(adapter->netdev, rds_ring->skb_size);
1482         if (!buffer->skb)
1483                 return 1;
1484
1485         skb = buffer->skb;
1486
1487         if (!adapter->ahw.cut_through)
1488                 skb_reserve(skb, 2);
1489
1490         dma = pci_map_single(pdev, skb->data,
1491                         rds_ring->dma_size, PCI_DMA_FROMDEVICE);
1492
1493         if (pci_dma_mapping_error(pdev, dma)) {
1494                 dev_kfree_skb_any(skb);
1495                 buffer->skb = NULL;
1496                 return 1;
1497         }
1498
1499         buffer->skb = skb;
1500         buffer->dma = dma;
1501         buffer->state = NETXEN_BUFFER_BUSY;
1502
1503         return 0;
1504 }
1505
1506 static struct sk_buff *netxen_process_rxbuf(struct netxen_adapter *adapter,
1507                 struct nx_host_rds_ring *rds_ring, u16 index, u16 cksum)
1508 {
1509         struct netxen_rx_buffer *buffer;
1510         struct sk_buff *skb;
1511
1512         buffer = &rds_ring->rx_buf_arr[index];
1513
1514         pci_unmap_single(adapter->pdev, buffer->dma, rds_ring->dma_size,
1515                         PCI_DMA_FROMDEVICE);
1516
1517         skb = buffer->skb;
1518         if (!skb)
1519                 goto no_skb;
1520
1521         if (likely((adapter->netdev->features & NETIF_F_RXCSUM)
1522             && cksum == STATUS_CKSUM_OK)) {
1523                 adapter->stats.csummed++;
1524                 skb->ip_summed = CHECKSUM_UNNECESSARY;
1525         } else
1526                 skb->ip_summed = CHECKSUM_NONE;
1527
1528         buffer->skb = NULL;
1529 no_skb:
1530         buffer->state = NETXEN_BUFFER_FREE;
1531         return skb;
1532 }
1533
1534 static struct netxen_rx_buffer *
1535 netxen_process_rcv(struct netxen_adapter *adapter,
1536                 struct nx_host_sds_ring *sds_ring,
1537                 int ring, u64 sts_data0)
1538 {
1539         struct net_device *netdev = adapter->netdev;
1540         struct netxen_recv_context *recv_ctx = &adapter->recv_ctx;
1541         struct netxen_rx_buffer *buffer;
1542         struct sk_buff *skb;
1543         struct nx_host_rds_ring *rds_ring;
1544         int index, length, cksum, pkt_offset;
1545
1546         if (unlikely(ring >= adapter->max_rds_rings))
1547                 return NULL;
1548
1549         rds_ring = &recv_ctx->rds_rings[ring];
1550
1551         index = netxen_get_sts_refhandle(sts_data0);
1552         if (unlikely(index >= rds_ring->num_desc))
1553                 return NULL;
1554
1555         buffer = &rds_ring->rx_buf_arr[index];
1556
1557         length = netxen_get_sts_totallength(sts_data0);
1558         cksum  = netxen_get_sts_status(sts_data0);
1559         pkt_offset = netxen_get_sts_pkt_offset(sts_data0);
1560
1561         skb = netxen_process_rxbuf(adapter, rds_ring, index, cksum);
1562         if (!skb)
1563                 return buffer;
1564
1565         if (length > rds_ring->skb_size)
1566                 skb_put(skb, rds_ring->skb_size);
1567         else
1568                 skb_put(skb, length);
1569
1570
1571         if (pkt_offset)
1572                 skb_pull(skb, pkt_offset);
1573
1574         skb->protocol = eth_type_trans(skb, netdev);
1575
1576         napi_gro_receive(&sds_ring->napi, skb);
1577
1578         adapter->stats.rx_pkts++;
1579         adapter->stats.rxbytes += length;
1580
1581         return buffer;
1582 }
1583
1584 #define TCP_HDR_SIZE            20
1585 #define TCP_TS_OPTION_SIZE      12
1586 #define TCP_TS_HDR_SIZE         (TCP_HDR_SIZE + TCP_TS_OPTION_SIZE)
1587
1588 static struct netxen_rx_buffer *
1589 netxen_process_lro(struct netxen_adapter *adapter,
1590                 struct nx_host_sds_ring *sds_ring,
1591                 int ring, u64 sts_data0, u64 sts_data1)
1592 {
1593         struct net_device *netdev = adapter->netdev;
1594         struct netxen_recv_context *recv_ctx = &adapter->recv_ctx;
1595         struct netxen_rx_buffer *buffer;
1596         struct sk_buff *skb;
1597         struct nx_host_rds_ring *rds_ring;
1598         struct iphdr *iph;
1599         struct tcphdr *th;
1600         bool push, timestamp;
1601         int l2_hdr_offset, l4_hdr_offset;
1602         int index;
1603         u16 lro_length, length, data_offset;
1604         u32 seq_number;
1605         u8 vhdr_len = 0;
1606
1607         if (unlikely(ring >= adapter->max_rds_rings))
1608                 return NULL;
1609
1610         rds_ring = &recv_ctx->rds_rings[ring];
1611
1612         index = netxen_get_lro_sts_refhandle(sts_data0);
1613         if (unlikely(index >= rds_ring->num_desc))
1614                 return NULL;
1615
1616         buffer = &rds_ring->rx_buf_arr[index];
1617
1618         timestamp = netxen_get_lro_sts_timestamp(sts_data0);
1619         lro_length = netxen_get_lro_sts_length(sts_data0);
1620         l2_hdr_offset = netxen_get_lro_sts_l2_hdr_offset(sts_data0);
1621         l4_hdr_offset = netxen_get_lro_sts_l4_hdr_offset(sts_data0);
1622         push = netxen_get_lro_sts_push_flag(sts_data0);
1623         seq_number = netxen_get_lro_sts_seq_number(sts_data1);
1624
1625         skb = netxen_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1626         if (!skb)
1627                 return buffer;
1628
1629         if (timestamp)
1630                 data_offset = l4_hdr_offset + TCP_TS_HDR_SIZE;
1631         else
1632                 data_offset = l4_hdr_offset + TCP_HDR_SIZE;
1633
1634         skb_put(skb, lro_length + data_offset);
1635
1636         skb_pull(skb, l2_hdr_offset);
1637         skb->protocol = eth_type_trans(skb, netdev);
1638
1639         if (skb->protocol == htons(ETH_P_8021Q))
1640                 vhdr_len = VLAN_HLEN;
1641         iph = (struct iphdr *)(skb->data + vhdr_len);
1642         th = (struct tcphdr *)((skb->data + vhdr_len) + (iph->ihl << 2));
1643
1644         length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1645         csum_replace2(&iph->check, iph->tot_len, htons(length));
1646         iph->tot_len = htons(length);
1647         th->psh = push;
1648         th->seq = htonl(seq_number);
1649
1650         length = skb->len;
1651
1652         if (adapter->flags & NETXEN_FW_MSS_CAP)
1653                 skb_shinfo(skb)->gso_size  =  netxen_get_lro_sts_mss(sts_data1);
1654
1655         netif_receive_skb(skb);
1656
1657         adapter->stats.lro_pkts++;
1658         adapter->stats.rxbytes += length;
1659
1660         return buffer;
1661 }
1662
1663 #define netxen_merge_rx_buffers(list, head) \
1664         do { list_splice_tail_init(list, head); } while (0);
1665
1666 int
1667 netxen_process_rcv_ring(struct nx_host_sds_ring *sds_ring, int max)
1668 {
1669         struct netxen_adapter *adapter = sds_ring->adapter;
1670
1671         struct list_head *cur;
1672
1673         struct status_desc *desc;
1674         struct netxen_rx_buffer *rxbuf;
1675
1676         u32 consumer = sds_ring->consumer;
1677
1678         int count = 0;
1679         u64 sts_data0, sts_data1;
1680         int opcode, ring = 0, desc_cnt;
1681
1682         while (count < max) {
1683                 desc = &sds_ring->desc_head[consumer];
1684                 sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1685
1686                 if (!(sts_data0 & STATUS_OWNER_HOST))
1687                         break;
1688
1689                 desc_cnt = netxen_get_sts_desc_cnt(sts_data0);
1690
1691                 opcode = netxen_get_sts_opcode(sts_data0);
1692
1693                 switch (opcode) {
1694                 case NETXEN_NIC_RXPKT_DESC:
1695                 case NETXEN_OLD_RXPKT_DESC:
1696                 case NETXEN_NIC_SYN_OFFLOAD:
1697                         ring = netxen_get_sts_type(sts_data0);
1698                         rxbuf = netxen_process_rcv(adapter, sds_ring,
1699                                         ring, sts_data0);
1700                         break;
1701                 case NETXEN_NIC_LRO_DESC:
1702                         ring = netxen_get_lro_sts_type(sts_data0);
1703                         sts_data1 = le64_to_cpu(desc->status_desc_data[1]);
1704                         rxbuf = netxen_process_lro(adapter, sds_ring,
1705                                         ring, sts_data0, sts_data1);
1706                         break;
1707                 case NETXEN_NIC_RESPONSE_DESC:
1708                         netxen_handle_fw_message(desc_cnt, consumer, sds_ring);
1709                 default:
1710                         goto skip;
1711                 }
1712
1713                 WARN_ON(desc_cnt > 1);
1714
1715                 if (rxbuf)
1716                         list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1717
1718 skip:
1719                 for (; desc_cnt > 0; desc_cnt--) {
1720                         desc = &sds_ring->desc_head[consumer];
1721                         desc->status_desc_data[0] =
1722                                 cpu_to_le64(STATUS_OWNER_PHANTOM);
1723                         consumer = get_next_index(consumer, sds_ring->num_desc);
1724                 }
1725                 count++;
1726         }
1727
1728         for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1729                 struct nx_host_rds_ring *rds_ring =
1730                         &adapter->recv_ctx.rds_rings[ring];
1731
1732                 if (!list_empty(&sds_ring->free_list[ring])) {
1733                         list_for_each(cur, &sds_ring->free_list[ring]) {
1734                                 rxbuf = list_entry(cur,
1735                                                 struct netxen_rx_buffer, list);
1736                                 netxen_alloc_rx_skb(adapter, rds_ring, rxbuf);
1737                         }
1738                         spin_lock(&rds_ring->lock);
1739                         netxen_merge_rx_buffers(&sds_ring->free_list[ring],
1740                                                 &rds_ring->free_list);
1741                         spin_unlock(&rds_ring->lock);
1742                 }
1743
1744                 netxen_post_rx_buffers_nodb(adapter, rds_ring);
1745         }
1746
1747         if (count) {
1748                 sds_ring->consumer = consumer;
1749                 NXWRIO(adapter, sds_ring->crb_sts_consumer, consumer);
1750         }
1751
1752         return count;
1753 }
1754
1755 /* Process Command status ring */
1756 int netxen_process_cmd_ring(struct netxen_adapter *adapter)
1757 {
1758         u32 sw_consumer, hw_consumer;
1759         int count = 0, i;
1760         struct netxen_cmd_buffer *buffer;
1761         struct pci_dev *pdev = adapter->pdev;
1762         struct net_device *netdev = adapter->netdev;
1763         struct netxen_skb_frag *frag;
1764         int done = 0;
1765         struct nx_host_tx_ring *tx_ring = adapter->tx_ring;
1766
1767         if (!spin_trylock_bh(&adapter->tx_clean_lock))
1768                 return 1;
1769
1770         sw_consumer = tx_ring->sw_consumer;
1771         hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
1772
1773         while (sw_consumer != hw_consumer) {
1774                 buffer = &tx_ring->cmd_buf_arr[sw_consumer];
1775                 if (buffer->skb) {
1776                         frag = &buffer->frag_array[0];
1777                         pci_unmap_single(pdev, frag->dma, frag->length,
1778                                          PCI_DMA_TODEVICE);
1779                         frag->dma = 0ULL;
1780                         for (i = 1; i < buffer->frag_count; i++) {
1781                                 frag++; /* Get the next frag */
1782                                 pci_unmap_page(pdev, frag->dma, frag->length,
1783                                                PCI_DMA_TODEVICE);
1784                                 frag->dma = 0ULL;
1785                         }
1786
1787                         adapter->stats.xmitfinished++;
1788                         dev_kfree_skb_any(buffer->skb);
1789                         buffer->skb = NULL;
1790                 }
1791
1792                 sw_consumer = get_next_index(sw_consumer, tx_ring->num_desc);
1793                 if (++count >= MAX_STATUS_HANDLE)
1794                         break;
1795         }
1796
1797         tx_ring->sw_consumer = sw_consumer;
1798
1799         if (count && netif_running(netdev)) {
1800                 smp_mb();
1801
1802                 if (netif_queue_stopped(netdev) && netif_carrier_ok(netdev))
1803                         if (netxen_tx_avail(tx_ring) > TX_STOP_THRESH)
1804                                 netif_wake_queue(netdev);
1805                 adapter->tx_timeo_cnt = 0;
1806         }
1807         /*
1808          * If everything is freed up to consumer then check if the ring is full
1809          * If the ring is full then check if more needs to be freed and
1810          * schedule the call back again.
1811          *
1812          * This happens when there are 2 CPUs. One could be freeing and the
1813          * other filling it. If the ring is full when we get out of here and
1814          * the card has already interrupted the host then the host can miss the
1815          * interrupt.
1816          *
1817          * There is still a possible race condition and the host could miss an
1818          * interrupt. The card has to take care of this.
1819          */
1820         hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
1821         done = (sw_consumer == hw_consumer);
1822         spin_unlock_bh(&adapter->tx_clean_lock);
1823
1824         return done;
1825 }
1826
1827 void
1828 netxen_post_rx_buffers(struct netxen_adapter *adapter, u32 ringid,
1829         struct nx_host_rds_ring *rds_ring)
1830 {
1831         struct rcv_desc *pdesc;
1832         struct netxen_rx_buffer *buffer;
1833         int producer, count = 0;
1834         netxen_ctx_msg msg = 0;
1835         struct list_head *head;
1836
1837         producer = rds_ring->producer;
1838
1839         head = &rds_ring->free_list;
1840         while (!list_empty(head)) {
1841
1842                 buffer = list_entry(head->next, struct netxen_rx_buffer, list);
1843
1844                 if (!buffer->skb) {
1845                         if (netxen_alloc_rx_skb(adapter, rds_ring, buffer))
1846                                 break;
1847                 }
1848
1849                 count++;
1850                 list_del(&buffer->list);
1851
1852                 /* make a rcv descriptor  */
1853                 pdesc = &rds_ring->desc_head[producer];
1854                 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
1855                 pdesc->reference_handle = cpu_to_le16(buffer->ref_handle);
1856                 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
1857
1858                 producer = get_next_index(producer, rds_ring->num_desc);
1859         }
1860
1861         if (count) {
1862                 rds_ring->producer = producer;
1863                 NXWRIO(adapter, rds_ring->crb_rcv_producer,
1864                                 (producer-1) & (rds_ring->num_desc-1));
1865
1866                 if (NX_IS_REVISION_P2(adapter->ahw.revision_id)) {
1867                         /*
1868                          * Write a doorbell msg to tell phanmon of change in
1869                          * receive ring producer
1870                          * Only for firmware version < 4.0.0
1871                          */
1872                         netxen_set_msg_peg_id(msg, NETXEN_RCV_PEG_DB_ID);
1873                         netxen_set_msg_privid(msg);
1874                         netxen_set_msg_count(msg,
1875                                              ((producer - 1) &
1876                                               (rds_ring->num_desc - 1)));
1877                         netxen_set_msg_ctxid(msg, adapter->portnum);
1878                         netxen_set_msg_opcode(msg, NETXEN_RCV_PRODUCER(ringid));
1879                         NXWRIO(adapter, DB_NORMALIZE(adapter,
1880                                         NETXEN_RCV_PRODUCER_OFFSET), msg);
1881                 }
1882         }
1883 }
1884
1885 static void
1886 netxen_post_rx_buffers_nodb(struct netxen_adapter *adapter,
1887                 struct nx_host_rds_ring *rds_ring)
1888 {
1889         struct rcv_desc *pdesc;
1890         struct netxen_rx_buffer *buffer;
1891         int producer, count = 0;
1892         struct list_head *head;
1893
1894         if (!spin_trylock(&rds_ring->lock))
1895                 return;
1896
1897         producer = rds_ring->producer;
1898
1899         head = &rds_ring->free_list;
1900         while (!list_empty(head)) {
1901
1902                 buffer = list_entry(head->next, struct netxen_rx_buffer, list);
1903
1904                 if (!buffer->skb) {
1905                         if (netxen_alloc_rx_skb(adapter, rds_ring, buffer))
1906                                 break;
1907                 }
1908
1909                 count++;
1910                 list_del(&buffer->list);
1911
1912                 /* make a rcv descriptor  */
1913                 pdesc = &rds_ring->desc_head[producer];
1914                 pdesc->reference_handle = cpu_to_le16(buffer->ref_handle);
1915                 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
1916                 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
1917
1918                 producer = get_next_index(producer, rds_ring->num_desc);
1919         }
1920
1921         if (count) {
1922                 rds_ring->producer = producer;
1923                 NXWRIO(adapter, rds_ring->crb_rcv_producer,
1924                                 (producer - 1) & (rds_ring->num_desc - 1));
1925         }
1926         spin_unlock(&rds_ring->lock);
1927 }
1928
1929 void netxen_nic_clear_stats(struct netxen_adapter *adapter)
1930 {
1931         memset(&adapter->stats, 0, sizeof(adapter->stats));
1932 }
1933