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netxen: improve msi support
[linux-2.6-block.git] / drivers / net / netxen / netxen_nic_main.c
CommitLineData
3d396eb1
AK		 1/*
2 * Copyright (C) 2003 - 2006 NetXen, Inc.
3 * All rights reserved.
80922fbc 4 *
3d396eb1
AK		 5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
80922fbc 9 *
3d396eb1
AK		 10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
80922fbc 14 *
3d396eb1
AK		 15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
18 * MA 02111-1307, USA.
80922fbc 19 *
3d396eb1
AK		 20 * The full GNU General Public License is included in this distribution
21 * in the file called LICENSE.
80922fbc 22 *
3d396eb1
AK		 23 * Contact Information:
24 * info@netxen.com
25 * NetXen,
26 * 3965 Freedom Circle, Fourth floor,
27 * Santa Clara, CA 95054
28 *
29 *
30 * Main source file for NetXen NIC Driver on Linux
31 *
32 */
33
cb8011ad 34#include <linux/vmalloc.h>
ed25ffa1 35#include <linux/highmem.h>
3d396eb1
AK		 36#include "netxen_nic_hw.h"
37
38#include "netxen_nic.h"
3d396eb1 39#include "netxen_nic_phan_reg.h"
3d396eb1 40
1494a814 41#include <linux/dma-mapping.h>
c9bdd4b5 42#include <net/ip.h>
1494a814 43
3d396eb1
AK		 44MODULE_DESCRIPTION("NetXen Multi port (1/10) Gigabit Network Driver");
45MODULE_LICENSE("GPL");
46MODULE_VERSION(NETXEN_NIC_LINUX_VERSIONID);
47
ceded32f 48char netxen_nic_driver_name[] = "netxen_nic";
3d396eb1 49static char netxen_nic_driver_string[] = "NetXen Network Driver version "
cb8011ad 50 NETXEN_NIC_LINUX_VERSIONID;
3d396eb1
AK		 51
52#define NETXEN_NETDEV_WEIGHT 120
53#define NETXEN_ADAPTER_UP_MAGIC 777
cb8011ad 54#define NETXEN_NIC_PEG_TUNE 0
3d396eb1
AK		 55
56/* Local functions to NetXen NIC driver */
57static int __devinit netxen_nic_probe(struct pci_dev *pdev,
58 const struct pci_device_id *ent);
59static void __devexit netxen_nic_remove(struct pci_dev *pdev);
60static int netxen_nic_open(struct net_device *netdev);
61static int netxen_nic_close(struct net_device *netdev);
62static int netxen_nic_xmit_frame(struct sk_buff *, struct net_device *);
63static void netxen_tx_timeout(struct net_device *netdev);
6d5aefb8 64static void netxen_tx_timeout_task(struct work_struct *work);
3d396eb1
AK		 65static void netxen_watchdog(unsigned long);
66static int netxen_handle_int(struct netxen_adapter *, struct net_device *);
bea3348e 67static int netxen_nic_poll(struct napi_struct *napi, int budget);
3d396eb1
AK		 68#ifdef CONFIG_NET_POLL_CONTROLLER
69static void netxen_nic_poll_controller(struct net_device *netdev);
70#endif
1494a814 71static irqreturn_t netxen_intr(int irq, void *data);
3d396eb1 72
6c80b18d
MT		 73int physical_port[] = {0, 1, 2, 3};
74
3d396eb1
AK		 75/* PCI Device ID Table */
76static struct pci_device_id netxen_pci_tbl[] __devinitdata = {
77 {PCI_DEVICE(0x4040, 0x0001)},
78 {PCI_DEVICE(0x4040, 0x0002)},
79 {PCI_DEVICE(0x4040, 0x0003)},
80 {PCI_DEVICE(0x4040, 0x0004)},
81 {PCI_DEVICE(0x4040, 0x0005)},
0d390734
AK		 82 {PCI_DEVICE(0x4040, 0x0024)},
83 {PCI_DEVICE(0x4040, 0x0025)},
3d396eb1
AK		 84 {0,}
85};
86
87MODULE_DEVICE_TABLE(pci, netxen_pci_tbl);
88
ed25ffa1
AK		 89struct workqueue_struct *netxen_workq;
90static void netxen_watchdog(unsigned long);
91
993fb90c
AB		 92static void netxen_nic_update_cmd_producer(struct netxen_adapter *adapter,
93 uint32_t crb_producer)
3176ff3e
MT		 94{
95 switch (adapter->portnum) {
96 case 0:
97 writel(crb_producer, NETXEN_CRB_NORMALIZE
98 (adapter, CRB_CMD_PRODUCER_OFFSET));
99 return;
100 case 1:
101 writel(crb_producer, NETXEN_CRB_NORMALIZE
102 (adapter, CRB_CMD_PRODUCER_OFFSET_1));
103 return;
104 case 2:
105 writel(crb_producer, NETXEN_CRB_NORMALIZE
106 (adapter, CRB_CMD_PRODUCER_OFFSET_2));
107 return;
108 case 3:
109 writel(crb_producer, NETXEN_CRB_NORMALIZE
110 (adapter, CRB_CMD_PRODUCER_OFFSET_3));
111 return;
112 default:
113 printk(KERN_WARNING "We tried to update "
114 "CRB_CMD_PRODUCER_OFFSET for invalid "
115 "PCI function id %d\n",
116 adapter->portnum);
117 return;
118 }
119}
120
993fb90c
AB		 121static void netxen_nic_update_cmd_consumer(struct netxen_adapter *adapter,
122 u32 crb_consumer)
3176ff3e
MT		 123{
124 switch (adapter->portnum) {
125 case 0:
126 writel(crb_consumer, NETXEN_CRB_NORMALIZE
127 (adapter, CRB_CMD_CONSUMER_OFFSET));
128 return;
129 case 1:
130 writel(crb_consumer, NETXEN_CRB_NORMALIZE
131 (adapter, CRB_CMD_CONSUMER_OFFSET_1));
132 return;
133 case 2:
134 writel(crb_consumer, NETXEN_CRB_NORMALIZE
135 (adapter, CRB_CMD_CONSUMER_OFFSET_2));
136 return;
137 case 3:
138 writel(crb_consumer, NETXEN_CRB_NORMALIZE
139 (adapter, CRB_CMD_CONSUMER_OFFSET_3));
140 return;
141 default:
142 printk(KERN_WARNING "We tried to update "
143 "CRB_CMD_PRODUCER_OFFSET for invalid "
144 "PCI function id %d\n",
145 adapter->portnum);
146 return;
147 }
148}
149
150#define ADAPTER_LIST_SIZE 12
3176ff3e 151
443be796
DP		 152static uint32_t msi_tgt_status[4] = {
153 ISR_INT_TARGET_STATUS, ISR_INT_TARGET_STATUS_F1,
154 ISR_INT_TARGET_STATUS_F2, ISR_INT_TARGET_STATUS_F3
155};
156
157static uint32_t sw_int_mask[4] = {
158 CRB_SW_INT_MASK_0, CRB_SW_INT_MASK_1,
159 CRB_SW_INT_MASK_2, CRB_SW_INT_MASK_3
160};
161
4638aef1
SH		 162static void netxen_nic_disable_int(struct netxen_adapter *adapter)
163{
443be796 164 u32 mask = 0x7ff;
4638aef1 165 int retries = 32;
443be796
DP		 166 int port = adapter->portnum;
167 int pci_fn = adapter->ahw.pci_func;
4638aef1 168
443be796
DP		 169 if (adapter->msi_mode != MSI_MODE_MULTIFUNC) {
170 writel(0x0, NETXEN_CRB_NORMALIZE(adapter, sw_int_mask[port]));
4638aef1
SH		 171 }
172
173 if (adapter->intr_scheme != -1 &&
174 adapter->intr_scheme != INTR_SCHEME_PERPORT)
175 writel(mask,PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_MASK));
176
4638aef1
SH		 177 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
178 do {
179 writel(0xffffffff,
180 PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_TARGET_STATUS));
181 mask = readl(pci_base_offset(adapter, ISR_INT_VECTOR));
182 if (!(mask & 0x80))
183 break;
184 udelay(10);
185 } while (--retries);
186
187 if (!retries) {
188 printk(KERN_NOTICE "%s: Failed to disable interrupt completely\n",
189 netxen_nic_driver_name);
190 }
443be796
DP		 191 } else {
192 if (adapter->msi_mode == MSI_MODE_MULTIFUNC) {
193 writel(0xffffffff, PCI_OFFSET_SECOND_RANGE(adapter,
194 msi_tgt_status[pci_fn]));
195 }
4638aef1 196 }
4638aef1
SH		 197}
198
199static void netxen_nic_enable_int(struct netxen_adapter *adapter)
200{
201 u32 mask;
443be796 202 int port = adapter->portnum;
4638aef1
SH		 203
204 DPRINTK(1, INFO, "Entered ISR Enable \n");
205
206 if (adapter->intr_scheme != -1 &&
207 adapter->intr_scheme != INTR_SCHEME_PERPORT) {
208 switch (adapter->ahw.board_type) {
209 case NETXEN_NIC_GBE:
210 mask = 0x77b;
211 break;
212 case NETXEN_NIC_XGBE:
213 mask = 0x77f;
214 break;
215 default:
216 mask = 0x7ff;
217 break;
218 }
219
220 writel(mask, PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_MASK));
221 }
222
443be796 223 writel(0x1, NETXEN_CRB_NORMALIZE(adapter, sw_int_mask[port]));
4638aef1
SH		 224
225 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
226 mask = 0xbff;
227 if (adapter->intr_scheme != -1 &&
228 adapter->intr_scheme != INTR_SCHEME_PERPORT) {
229 writel(0X0, NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
230 }
231 writel(mask,
232 PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_TARGET_MASK));
233 }
234
235 DPRINTK(1, INFO, "Done with enable Int\n");
236}
237
3d396eb1
AK		 238/*
239 * netxen_nic_probe()
240 *
241 * The Linux system will invoke this after identifying the vendor ID and
242 * device Id in the pci_tbl supported by this module.
243 *
244 * A quad port card has one operational PCI config space, (function 0),
245 * which is used to access all four ports.
246 *
247 * This routine will initialize the adapter, and setup the global parameters
248 * along with the port's specific structure.
249 */
250static int __devinit
251netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
252{
253 struct net_device *netdev = NULL;
254 struct netxen_adapter *adapter = NULL;
ed25ffa1
AK		 255 void __iomem *mem_ptr0 = NULL;
256 void __iomem *mem_ptr1 = NULL;
257 void __iomem *mem_ptr2 = NULL;
6c80b18d
MT		 258 unsigned long first_page_group_end;
259 unsigned long first_page_group_start;
260
cb8011ad 261
a608ab9c 262 u8 __iomem *db_ptr = NULL;
ed25ffa1 263 unsigned long mem_base, mem_len, db_base, db_len;
3176ff3e 264 int pci_using_dac, i = 0, err;
3d396eb1
AK		 265 int ring;
266 struct netxen_recv_context *recv_ctx = NULL;
267 struct netxen_rcv_desc_ctx *rcv_desc = NULL;
268 struct netxen_cmd_buffer *cmd_buf_arr = NULL;
f305f789 269 __le64 mac_addr[FLASH_NUM_PORTS + 1];
6c80b18d
MT		 270 int valid_mac = 0;
271 u32 val;
3176ff3e 272 int pci_func_id = PCI_FUNC(pdev->devfn);
0795af57 273 DECLARE_MAC_BUF(mac);
3d396eb1 274
cb8011ad 275 printk(KERN_INFO "%s \n", netxen_nic_driver_string);
6c80b18d 276
3176ff3e 277 if (pdev->class != 0x020000) {
5bc51424 278 printk(KERN_ERR"NetXen function %d, class %x will not "
3176ff3e 279 "be enabled.\n",pci_func_id, pdev->class);
ed25ffa1
AK		 280 return -ENODEV;
281 }
3d396eb1
AK		 282 if ((err = pci_enable_device(pdev)))
283 return err;
284 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
285 err = -ENODEV;
286 goto err_out_disable_pdev;
287 }
288
289 if ((err = pci_request_regions(pdev, netxen_nic_driver_name)))
290 goto err_out_disable_pdev;
291
292 pci_set_master(pdev);
44c10138 293 if (pdev->revision == NX_P2_C1 &&
ed25ffa1
AK		 294 (pci_set_dma_mask(pdev, DMA_35BIT_MASK) == 0) &&
295 (pci_set_consistent_dma_mask(pdev, DMA_35BIT_MASK) == 0)) {
3d396eb1 296 pci_using_dac = 1;
ed25ffa1 297 } else {
3d396eb1
AK		 298 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) ||
299 (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK)))
300 goto err_out_free_res;
301
302 pci_using_dac = 0;
303 }
304
3176ff3e
MT		 305
306 netdev = alloc_etherdev(sizeof(struct netxen_adapter));
307 if(!netdev) {
308 printk(KERN_ERR"%s: Failed to allocate memory for the "
309 "device block.Check system memory resource"
310 " usage.\n", netxen_nic_driver_name);
311 goto err_out_free_res;
312 }
313
3176ff3e
MT		 314 SET_NETDEV_DEV(netdev, &pdev->dev);
315
316 adapter = netdev->priv;
3176ff3e
MT		 317
318 adapter->ahw.pdev = pdev;
13ba9c77 319 adapter->ahw.pci_func = pci_func_id;
6c80b18d 320 spin_lock_init(&adapter->tx_lock);
13ba9c77 321
3d396eb1
AK		 322 /* remap phys address */
323 mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */
324 mem_len = pci_resource_len(pdev, 0);
325
326 /* 128 Meg of memory */
6c80b18d
MT		 327 if (mem_len == NETXEN_PCI_128MB_SIZE) {
328 mem_ptr0 = ioremap(mem_base, FIRST_PAGE_GROUP_SIZE);
329 mem_ptr1 = ioremap(mem_base + SECOND_PAGE_GROUP_START,
330 SECOND_PAGE_GROUP_SIZE);
331 mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START,
332 THIRD_PAGE_GROUP_SIZE);
333 first_page_group_start = FIRST_PAGE_GROUP_START;
334 first_page_group_end = FIRST_PAGE_GROUP_END;
335 } else if (mem_len == NETXEN_PCI_32MB_SIZE) {
336 mem_ptr1 = ioremap(mem_base, SECOND_PAGE_GROUP_SIZE);
337 mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START -
338 SECOND_PAGE_GROUP_START, THIRD_PAGE_GROUP_SIZE);
339 first_page_group_start = 0;
340 first_page_group_end = 0;
341 } else {
4790654c 342 err = -EIO;
6c80b18d
MT		 343 goto err_out_free_netdev;
344 }
cb8011ad 345
79ea13ce
AV		 346 if ((!mem_ptr0 && mem_len == NETXEN_PCI_128MB_SIZE) ||
347 !mem_ptr1 || !mem_ptr2) {
ed25ffa1 348 DPRINTK(ERR,
cb8011ad
AK		 349 "Cannot remap adapter memory aborting.:"
350 "0 -> %p, 1 -> %p, 2 -> %p\n",
351 mem_ptr0, mem_ptr1, mem_ptr2);
352
3d396eb1 353 err = -EIO;
ed25ffa1
AK		 354 goto err_out_iounmap;
355 }
356 db_base = pci_resource_start(pdev, 4); /* doorbell is on bar 4 */
357 db_len = pci_resource_len(pdev, 4);
358
359 if (db_len == 0) {
360 printk(KERN_ERR "%s: doorbell is disabled\n",
361 netxen_nic_driver_name);
362 err = -EIO;
363 goto err_out_iounmap;
364 }
365 DPRINTK(INFO, "doorbell ioremap from %lx a size of %lx\n", db_base,
366 db_len);
367
368 db_ptr = ioremap(db_base, NETXEN_DB_MAPSIZE_BYTES);
a608ab9c 369 if (!db_ptr) {
ed25ffa1
AK		 370 printk(KERN_ERR "%s: Failed to allocate doorbell map.",
371 netxen_nic_driver_name);
372 err = -EIO;
373 goto err_out_iounmap;
3d396eb1 374 }
ed25ffa1 375 DPRINTK(INFO, "doorbell ioremaped at %p\n", db_ptr);
3d396eb1 376
6c80b18d
MT		 377 adapter->ahw.pci_base0 = mem_ptr0;
378 adapter->ahw.first_page_group_start = first_page_group_start;
379 adapter->ahw.first_page_group_end = first_page_group_end;
380 adapter->ahw.pci_base1 = mem_ptr1;
381 adapter->ahw.pci_base2 = mem_ptr2;
382 adapter->ahw.db_base = db_ptr;
383 adapter->ahw.db_len = db_len;
3d396eb1 384
3176ff3e
MT		 385 adapter->netdev = netdev;
386 adapter->pdev = pdev;
2d1a3bbd 387
bea3348e
SH		 388 netif_napi_add(netdev, &adapter->napi,
389 netxen_nic_poll, NETXEN_NETDEV_WEIGHT);
390
2d1a3bbd 391 /* this will be read from FW later */
392 adapter->intr_scheme = -1;
443be796 393 adapter->msi_mode = -1;
2d1a3bbd 394
395 /* This will be reset for mezz cards */
3176ff3e 396 adapter->portnum = pci_func_id;
2d1a3bbd 397 adapter->status &= ~NETXEN_NETDEV_STATUS;
200eef20 398 adapter->rx_csum = 1;
3176ff3e
MT		 399
400 netdev->open = netxen_nic_open;
401 netdev->stop = netxen_nic_close;
402 netdev->hard_start_xmit = netxen_nic_xmit_frame;
4790654c 403 netdev->get_stats = netxen_nic_get_stats;
3176ff3e
MT		 404 netdev->set_multicast_list = netxen_nic_set_multi;
405 netdev->set_mac_address = netxen_nic_set_mac;
406 netdev->change_mtu = netxen_nic_change_mtu;
407 netdev->tx_timeout = netxen_tx_timeout;
408 netdev->watchdog_timeo = HZ;
409
410 netxen_nic_change_mtu(netdev, netdev->mtu);
411
412 SET_ETHTOOL_OPS(netdev, &netxen_nic_ethtool_ops);
3176ff3e
MT		 413#ifdef CONFIG_NET_POLL_CONTROLLER
414 netdev->poll_controller = netxen_nic_poll_controller;
415#endif
416 /* ScatterGather support */
417 netdev->features = NETIF_F_SG;
418 netdev->features |= NETIF_F_IP_CSUM;
419 netdev->features |= NETIF_F_TSO;
420
421 if (pci_using_dac)
422 netdev->features |= NETIF_F_HIGHDMA;
423
644caeef 424 if (pci_enable_msi(pdev))
3176ff3e 425 adapter->flags &= ~NETXEN_NIC_MSI_ENABLED;
644caeef 426 else
3176ff3e
MT		 427 adapter->flags |= NETXEN_NIC_MSI_ENABLED;
428
6c80b18d
MT		 429 netdev->irq = pdev->irq;
430 INIT_WORK(&adapter->tx_timeout_task, netxen_tx_timeout_task);
431
432 /*
433 * Set the CRB window to invalid. If any register in window 0 is
434 * accessed it should set the window to 0 and then reset it to 1.
435 */
436 adapter->curr_window = 255;
437
438 /* initialize the adapter */
439 netxen_initialize_adapter_hw(adapter);
440
6c80b18d
MT		 441 /*
442 * Adapter in our case is quad port so initialize it before
443 * initializing the ports
444 */
445
446 netxen_initialize_adapter_ops(adapter);
447
448 adapter->max_tx_desc_count = MAX_CMD_DESCRIPTORS_HOST;
449 if ((adapter->ahw.boardcfg.board_type == NETXEN_BRDTYPE_P2_SB35_4G) ||
4790654c
JG		 450 (adapter->ahw.boardcfg.board_type ==
451 NETXEN_BRDTYPE_P2_SB31_2G))
6c80b18d
MT		 452 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_1G;
453 else
454 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS;
455 adapter->max_jumbo_rx_desc_count = MAX_JUMBO_RCV_DESCRIPTORS;
456 adapter->max_lro_rx_desc_count = MAX_LRO_RCV_DESCRIPTORS;
457
3d396eb1
AK		 458 cmd_buf_arr = (struct netxen_cmd_buffer *)vmalloc(TX_RINGSIZE);
459 if (cmd_buf_arr == NULL) {
ed25ffa1
AK		 460 printk(KERN_ERR
461 "%s: Could not allocate cmd_buf_arr memory:%d\n",
462 netxen_nic_driver_name, (int)TX_RINGSIZE);
3d396eb1
AK		 463 err = -ENOMEM;
464 goto err_out_free_adapter;
465 }
466 memset(cmd_buf_arr, 0, TX_RINGSIZE);
6c80b18d 467 adapter->cmd_buf_arr = cmd_buf_arr;
3d396eb1
AK		 468
469 for (i = 0; i < MAX_RCV_CTX; ++i) {
470 recv_ctx = &adapter->recv_ctx[i];
471 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
472 rcv_desc = &recv_ctx->rcv_desc[ring];
473 switch (RCV_DESC_TYPE(ring)) {
474 case RCV_DESC_NORMAL:
475 rcv_desc->max_rx_desc_count =
476 adapter->max_rx_desc_count;
477 rcv_desc->flags = RCV_DESC_NORMAL;
478 rcv_desc->dma_size = RX_DMA_MAP_LEN;
479 rcv_desc->skb_size = MAX_RX_BUFFER_LENGTH;
480 break;
481
482 case RCV_DESC_JUMBO:
483 rcv_desc->max_rx_desc_count =
484 adapter->max_jumbo_rx_desc_count;
485 rcv_desc->flags = RCV_DESC_JUMBO;
486 rcv_desc->dma_size = RX_JUMBO_DMA_MAP_LEN;
487 rcv_desc->skb_size = MAX_RX_JUMBO_BUFFER_LENGTH;
488 break;
489
ed25ffa1
AK		 490 case RCV_RING_LRO:
491 rcv_desc->max_rx_desc_count =
492 adapter->max_lro_rx_desc_count;
493 rcv_desc->flags = RCV_DESC_LRO;
494 rcv_desc->dma_size = RX_LRO_DMA_MAP_LEN;
495 rcv_desc->skb_size = MAX_RX_LRO_BUFFER_LENGTH;
496 break;
497
3d396eb1
AK		 498 }
499 rcv_desc->rx_buf_arr = (struct netxen_rx_buffer *)
500 vmalloc(RCV_BUFFSIZE);
501
502 if (rcv_desc->rx_buf_arr == NULL) {
5bc51424 503 printk(KERN_ERR "%s: Could not allocate "
ed25ffa1
AK		 504 "rcv_desc->rx_buf_arr memory:%d\n",
505 netxen_nic_driver_name,
506 (int)RCV_BUFFSIZE);
3d396eb1
AK		 507 err = -ENOMEM;
508 goto err_out_free_rx_buffer;
509 }
510 memset(rcv_desc->rx_buf_arr, 0, RCV_BUFFSIZE);
511 }
512
513 }
514
ed25ffa1 515 netxen_initialize_adapter_sw(adapter); /* initialize the buffers in adapter */
6c80b18d 516
13ba9c77 517 /* Mezz cards have PCI function 0,2,3 enabled */
6c80b18d
MT		 518 if ((adapter->ahw.boardcfg.board_type == NETXEN_BRDTYPE_P2_SB31_10G_IMEZ)
519 && (pci_func_id >= 2))
13ba9c77
MT		 520 adapter->portnum = pci_func_id - 2;
521
cb8011ad 522#ifdef CONFIG_IA64
13ba9c77 523 if(adapter->portnum == 0) {
3176ff3e
MT		 524 netxen_pinit_from_rom(adapter, 0);
525 udelay(500);
526 netxen_load_firmware(adapter);
527 }
cb8011ad
AK		 528#endif
529
3d396eb1
AK		 530 init_timer(&adapter->watchdog_timer);
531 adapter->ahw.xg_linkup = 0;
532 adapter->watchdog_timer.function = &netxen_watchdog;
533 adapter->watchdog_timer.data = (unsigned long)adapter;
6d5aefb8 534 INIT_WORK(&adapter->watchdog_task, netxen_watchdog_task);
3d396eb1
AK		 535 adapter->ahw.pdev = pdev;
536 adapter->proc_cmd_buf_counter = 0;
44c10138 537 adapter->ahw.revision_id = pdev->revision;
3d396eb1 538
6c80b18d
MT		 539 /* make sure Window == 1 */
540 netxen_nic_pci_change_crbwindow(adapter, 1);
541
3176ff3e
MT		 542 netxen_nic_update_cmd_producer(adapter, 0);
543 netxen_nic_update_cmd_consumer(adapter, 0);
6c80b18d 544 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_HOST_CMD_ADDR_LO));
3d396eb1
AK		 545
546 if (netxen_is_flash_supported(adapter) == 0 &&
547 netxen_get_flash_mac_addr(adapter, mac_addr) == 0)
548 valid_mac = 1;
549 else
550 valid_mac = 0;
551
3176ff3e 552 if (valid_mac) {
13ba9c77 553 unsigned char *p = (unsigned char *)&mac_addr[adapter->portnum];
3176ff3e
MT		 554 netdev->dev_addr[0] = *(p + 5);
555 netdev->dev_addr[1] = *(p + 4);
556 netdev->dev_addr[2] = *(p + 3);
557 netdev->dev_addr[3] = *(p + 2);
558 netdev->dev_addr[4] = *(p + 1);
559 netdev->dev_addr[5] = *(p + 0);
560
561 memcpy(netdev->perm_addr, netdev->dev_addr,
562 netdev->addr_len);
563 if (!is_valid_ether_addr(netdev->perm_addr)) {
0795af57
JP		 564 printk(KERN_ERR "%s: Bad MAC address %s.\n",
565 netxen_nic_driver_name,
566 print_mac(mac, netdev->dev_addr));
3176ff3e
MT		 567 } else {
568 if (adapter->macaddr_set)
569 adapter->macaddr_set(adapter,
570 netdev->dev_addr);
571 }
572 }
573
6c80b18d 574 if (adapter->portnum == 0) {
13ba9c77 575 err = netxen_initialize_adapter_offload(adapter);
4790654c 576 if (err)
6c80b18d 577 goto err_out_free_rx_buffer;
4790654c 578 val = readl(NETXEN_CRB_NORMALIZE(adapter,
6c80b18d
MT		 579 NETXEN_CAM_RAM(0x1fc)));
580 if (val == 0x55555555) {
581 /* This is the first boot after power up */
644caeef 582 netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(0x4), &val);
96acb6eb
DP		 583 if (!(val & 0x4)) {
584 val |= 0x4;
585 netxen_nic_write_w0(adapter, NETXEN_PCIE_REG(0x4), val);
586 netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(0x4), &val);
587 if (!(val & 0x4))
588 printk(KERN_ERR "%s: failed to set MSI bit in PCI-e reg\n",
589 netxen_nic_driver_name);
590 }
6c80b18d
MT		 591 val = readl(NETXEN_CRB_NORMALIZE(adapter,
592 NETXEN_ROMUSB_GLB_SW_RESET));
593 printk(KERN_INFO"NetXen: read 0x%08x for reset reg.\n",val);
594 if (val != 0x80000f) {
595 /* clear the register for future unloads/loads */
644caeef 596 writel(0, NETXEN_CRB_NORMALIZE(adapter,
597 NETXEN_CAM_RAM(0x1fc)));
598 printk(KERN_ERR "ERROR in NetXen HW init sequence.\n");
599 err = -ENODEV;
600 goto err_out_free_dev;
6c80b18d 601 }
6c80b18d 602 }
96acb6eb
DP		 603
604 /* clear the register for future unloads/loads */
605 writel(0, NETXEN_CRB_NORMALIZE(adapter, NETXEN_CAM_RAM(0x1fc)));
6c80b18d
MT		 606 printk(KERN_INFO "State: 0x%0x\n",
607 readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)));
608
609 /*
610 * Tell the hardware our version number.
611 */
4790654c 612 i = (_NETXEN_NIC_LINUX_MAJOR << 16)
6c80b18d
MT		 613 | ((_NETXEN_NIC_LINUX_MINOR << 8))
614 | (_NETXEN_NIC_LINUX_SUBVERSION);
615 writel(i, NETXEN_CRB_NORMALIZE(adapter, CRB_DRIVER_VERSION));
3d396eb1 616
3176ff3e
MT		 617 /* Unlock the HW, prompting the boot sequence */
618 writel(1,
619 NETXEN_CRB_NORMALIZE(adapter,
620 NETXEN_ROMUSB_GLB_PEGTUNE_DONE));
621 /* Handshake with the card before we register the devices. */
622 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
623 }
3d396eb1 624
3d396eb1 625 /*
6c80b18d 626 * See if the firmware gave us a virtual-physical port mapping.
3d396eb1 627 */
6c80b18d
MT		 628 i = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_V2P(adapter->portnum)));
629 if (i != 0x55555555)
630 physical_port[adapter->portnum] = i;
631
3176ff3e
MT		 632 netif_carrier_off(netdev);
633 netif_stop_queue(netdev);
634
6c80b18d
MT		 635 if ((err = register_netdev(netdev))) {
636 printk(KERN_ERR "%s: register_netdev failed port #%d"
637 " aborting\n", netxen_nic_driver_name,
638 adapter->portnum);
639 err = -EIO;
640 goto err_out_free_dev;
641 }
642
643 pci_set_drvdata(pdev, adapter);
3d396eb1
AK		 644
645 switch (adapter->ahw.board_type) {
3176ff3e
MT		 646 case NETXEN_NIC_GBE:
647 printk(KERN_INFO "%s: QUAD GbE board initialized\n",
648 netxen_nic_driver_name);
649 break;
3d396eb1 650
3176ff3e 651 case NETXEN_NIC_XGBE:
4790654c 652 printk(KERN_INFO "%s: XGbE board initialized\n",
3176ff3e
MT		 653 netxen_nic_driver_name);
654 break;
3d396eb1
AK		 655 }
656
657 adapter->driver_mismatch = 0;
658
659 return 0;
660
6c80b18d
MT		 661err_out_free_dev:
662 if (adapter->portnum == 0)
663 netxen_free_adapter_offload(adapter);
ed25ffa1 664
6c80b18d 665err_out_free_rx_buffer:
3d396eb1
AK		 666 for (i = 0; i < MAX_RCV_CTX; ++i) {
667 recv_ctx = &adapter->recv_ctx[i];
668 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
669 rcv_desc = &recv_ctx->rcv_desc[ring];
670 if (rcv_desc->rx_buf_arr != NULL) {
671 vfree(rcv_desc->rx_buf_arr);
672 rcv_desc->rx_buf_arr = NULL;
673 }
674 }
675 }
3d396eb1
AK		 676 vfree(cmd_buf_arr);
677
6c80b18d
MT		 678err_out_free_adapter:
679 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
680 pci_disable_msi(pdev);
681
3d396eb1 682 pci_set_drvdata(pdev, NULL);
3d396eb1 683
ed25ffa1
AK		 684 if (db_ptr)
685 iounmap(db_ptr);
686
6c80b18d 687err_out_iounmap:
ed25ffa1
AK		 688 if (mem_ptr0)
689 iounmap(mem_ptr0);
690 if (mem_ptr1)
691 iounmap(mem_ptr1);
692 if (mem_ptr2)
693 iounmap(mem_ptr2);
cb8011ad 694
6c80b18d
MT		 695err_out_free_netdev:
696 free_netdev(netdev);
697
698err_out_free_res:
3d396eb1 699 pci_release_regions(pdev);
6c80b18d
MT		 700
701err_out_disable_pdev:
3d396eb1
AK		 702 pci_disable_device(pdev);
703 return err;
704}
705
706static void __devexit netxen_nic_remove(struct pci_dev *pdev)
707{
708 struct netxen_adapter *adapter;
3176ff3e 709 struct net_device *netdev;
3d396eb1
AK		 710 struct netxen_rx_buffer *buffer;
711 struct netxen_recv_context *recv_ctx;
712 struct netxen_rcv_desc_ctx *rcv_desc;
96acb6eb
DP		 713 int i, ctxid, ring;
714 static int init_firmware_done = 0;
3d396eb1 715
6c80b18d 716 adapter = pci_get_drvdata(pdev);
3d396eb1
AK		 717 if (adapter == NULL)
718 return;
719
6c80b18d
MT		 720 netdev = adapter->netdev;
721
96acb6eb
DP		 722 unregister_netdev(netdev);
723
96acb6eb
DP		 724 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) {
725 init_firmware_done++;
3d396eb1 726 netxen_free_hw_resources(adapter);
96acb6eb 727 }
3d396eb1 728
3d396eb1
AK		 729 for (ctxid = 0; ctxid < MAX_RCV_CTX; ++ctxid) {
730 recv_ctx = &adapter->recv_ctx[ctxid];
731 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
732 rcv_desc = &recv_ctx->rcv_desc[ring];
733 for (i = 0; i < rcv_desc->max_rx_desc_count; ++i) {
734 buffer = &(rcv_desc->rx_buf_arr[i]);
735 if (buffer->state == NETXEN_BUFFER_FREE)
736 continue;
737 pci_unmap_single(pdev, buffer->dma,
738 rcv_desc->dma_size,
739 PCI_DMA_FROMDEVICE);
740 if (buffer->skb != NULL)
741 dev_kfree_skb_any(buffer->skb);
742 }
743 vfree(rcv_desc->rx_buf_arr);
744 }
745 }
746
6c80b18d
MT		 747 vfree(adapter->cmd_buf_arr);
748
96acb6eb
DP		 749 if (adapter->portnum == 0) {
750 if (init_firmware_done) {
96acb6eb 751 i = 100;
ceded32f 752 do {
753 if (dma_watchdog_shutdown_request(adapter) == 1)
754 break;
96acb6eb 755 msleep(100);
ceded32f 756 if (dma_watchdog_shutdown_poll_result(adapter) == 1)
757 break;
758 } while (--i);
96acb6eb 759
ceded32f 760 if (i == 0)
761 printk(KERN_ERR "%s: dma_watchdog_shutdown failed\n",
762 netdev->name);
96acb6eb
DP		 763
764 /* clear the register for future unloads/loads */
765 writel(0, NETXEN_CRB_NORMALIZE(adapter, NETXEN_CAM_RAM(0x1fc)));
766 printk(KERN_INFO "State: 0x%0x\n",
767 readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)));
768
769 /* leave the hw in the same state as reboot */
770 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));
ceded32f 771 netxen_pinit_from_rom(adapter, 0);
96acb6eb 772 msleep(1);
ceded32f 773 netxen_load_firmware(adapter);
96acb6eb
DP		 774 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
775 }
776
777 /* clear the register for future unloads/loads */
778 writel(0, NETXEN_CRB_NORMALIZE(adapter, NETXEN_CAM_RAM(0x1fc)));
779 printk(KERN_INFO "State: 0x%0x\n",
780 readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)));
781
96acb6eb 782 i = 100;
ceded32f 783 do {
784 if (dma_watchdog_shutdown_request(adapter) == 1)
785 break;
96acb6eb 786 msleep(100);
ceded32f 787 if (dma_watchdog_shutdown_poll_result(adapter) == 1)
788 break;
789 } while (--i);
96acb6eb
DP		 790
791 if (i) {
792 netxen_free_adapter_offload(adapter);
793 } else {
ceded32f 794 printk(KERN_ERR "%s: dma_watchdog_shutdown failed\n",
795 netdev->name);
96acb6eb 796 }
96acb6eb
DP		 797 }
798
3052246c 799 if (adapter->irq)
800 free_irq(adapter->irq, adapter);
801
802 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
803 pci_disable_msi(pdev);
804
6c80b18d
MT		 805 iounmap(adapter->ahw.db_base);
806 iounmap(adapter->ahw.pci_base0);
807 iounmap(adapter->ahw.pci_base1);
808 iounmap(adapter->ahw.pci_base2);
595e3fb8
MT		 809
810 pci_release_regions(pdev);
3052246c 811 pci_disable_device(pdev);
595e3fb8
MT		 812 pci_set_drvdata(pdev, NULL);
813
6c80b18d 814 free_netdev(netdev);
3d396eb1
AK		 815}
816
817/*
818 * Called when a network interface is made active
819 * @returns 0 on success, negative value on failure
820 */
821static int netxen_nic_open(struct net_device *netdev)
822{
3176ff3e 823 struct netxen_adapter *adapter = (struct netxen_adapter *)netdev->priv;
3d396eb1
AK		 824 int err = 0;
825 int ctx, ring;
826
827 if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC) {
828 err = netxen_init_firmware(adapter);
829 if (err != 0) {
830 printk(KERN_ERR "Failed to init firmware\n");
831 return -EIO;
832 }
833 netxen_nic_flash_print(adapter);
834
835 /* setup all the resources for the Phantom... */
836 /* this include the descriptors for rcv, tx, and status */
837 netxen_nic_clear_stats(adapter);
838 err = netxen_nic_hw_resources(adapter);
839 if (err) {
840 printk(KERN_ERR "Error in setting hw resources:%d\n",
841 err);
842 return err;
843 }
3d396eb1 844 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
cb8011ad 845 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++)
3d396eb1 846 netxen_post_rx_buffers(adapter, ctx, ring);
3d396eb1 847 }
ed25ffa1 848 adapter->irq = adapter->ahw.pdev->irq;
6c80b18d 849 err = request_irq(adapter->ahw.pdev->irq, netxen_intr,
1c8e039a 850 IRQF_SHARED|IRQF_SAMPLE_RANDOM, netdev->name,
6c80b18d 851 adapter);
3d396eb1
AK		 852 if (err) {
853 printk(KERN_ERR "request_irq failed with: %d\n", err);
ed25ffa1 854 netxen_free_hw_resources(adapter);
3d396eb1
AK		 855 return err;
856 }
ed25ffa1
AK		 857
858 adapter->is_up = NETXEN_ADAPTER_UP_MAGIC;
859 }
3176ff3e
MT		 860 if (!adapter->driver_mismatch)
861 mod_timer(&adapter->watchdog_timer, jiffies);
3d396eb1 862
bea3348e
SH		 863 napi_enable(&adapter->napi);
864
3176ff3e 865 netxen_nic_enable_int(adapter);
3d396eb1
AK		 866
867 /* Done here again so that even if phantom sw overwrote it,
868 * we set it */
595e3fb8
MT		 869 if (adapter->init_port
870 && adapter->init_port(adapter, adapter->portnum) != 0) {
6c80b18d 871 del_timer_sync(&adapter->watchdog_timer);
595e3fb8
MT		 872 printk(KERN_ERR "%s: Failed to initialize port %d\n",
873 netxen_nic_driver_name, adapter->portnum);
bea3348e 874 napi_disable(&adapter->napi);
595e3fb8
MT		 875 return -EIO;
876 }
7eec517c 877 if (adapter->macaddr_set)
878 adapter->macaddr_set(adapter, netdev->dev_addr);
595e3fb8 879
3176ff3e 880 netxen_nic_set_link_parameters(adapter);
3d396eb1
AK		 881
882 netxen_nic_set_multi(netdev);
ed25ffa1 883 if (adapter->set_mtu)
3176ff3e 884 adapter->set_mtu(adapter, netdev->mtu);
ed25ffa1 885
3d396eb1
AK		 886 if (!adapter->driver_mismatch)
887 netif_start_queue(netdev);
888
889 return 0;
890}
891
892/*
893 * netxen_nic_close - Disables a network interface entry point
894 */
895static int netxen_nic_close(struct net_device *netdev)
896{
3176ff3e 897 struct netxen_adapter *adapter = netdev_priv(netdev);
3d396eb1
AK		 898 int i, j;
899 struct netxen_cmd_buffer *cmd_buff;
900 struct netxen_skb_frag *buffrag;
901
902 netif_carrier_off(netdev);
903 netif_stop_queue(netdev);
bea3348e 904 napi_disable(&adapter->napi);
3d396eb1 905
72b0a7a8 906 if (adapter->stop_port)
907 adapter->stop_port(adapter);
908
e01872af 909 netxen_nic_disable_int(adapter);
910
3176ff3e
MT		 911 cmd_buff = adapter->cmd_buf_arr;
912 for (i = 0; i < adapter->max_tx_desc_count; i++) {
913 buffrag = cmd_buff->frag_array;
914 if (buffrag->dma) {
915 pci_unmap_single(adapter->pdev, buffrag->dma,
916 buffrag->length, PCI_DMA_TODEVICE);
96acb6eb 917 buffrag->dma = 0ULL;
3176ff3e
MT		 918 }
919 for (j = 0; j < cmd_buff->frag_count; j++) {
920 buffrag++;
3d396eb1 921 if (buffrag->dma) {
3176ff3e 922 pci_unmap_page(adapter->pdev, buffrag->dma,
4790654c 923 buffrag->length,
3176ff3e 924 PCI_DMA_TODEVICE);
96acb6eb 925 buffrag->dma = 0ULL;
3d396eb1 926 }
3d396eb1 927 }
3176ff3e
MT		 928 /* Free the skb we received in netxen_nic_xmit_frame */
929 if (cmd_buff->skb) {
930 dev_kfree_skb_any(cmd_buff->skb);
931 cmd_buff->skb = NULL;
932 }
933 cmd_buff++;
3d396eb1 934 }
96acb6eb
DP		 935 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) {
936 FLUSH_SCHEDULED_WORK();
937 del_timer_sync(&adapter->watchdog_timer);
938 }
3d396eb1
AK		 939
940 return 0;
941}
942
943static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
944{
3176ff3e 945 struct netxen_adapter *adapter = netdev_priv(netdev);
3d396eb1
AK		 946 struct netxen_hardware_context *hw = &adapter->ahw;
947 unsigned int first_seg_len = skb->len - skb->data_len;
948 struct netxen_skb_frag *buffrag;
949 unsigned int i;
950
951 u32 producer = 0;
952 u32 saved_producer = 0;
953 struct cmd_desc_type0 *hwdesc;
954 int k;
955 struct netxen_cmd_buffer *pbuf = NULL;
3d396eb1
AK		 956 static int dropped_packet = 0;
957 int frag_count;
958 u32 local_producer = 0;
959 u32 max_tx_desc_count = 0;
960 u32 last_cmd_consumer = 0;
961 int no_of_desc;
962
3176ff3e 963 adapter->stats.xmitcalled++;
3d396eb1
AK		 964 frag_count = skb_shinfo(skb)->nr_frags + 1;
965
966 if (unlikely(skb->len <= 0)) {
967 dev_kfree_skb_any(skb);
3176ff3e 968 adapter->stats.badskblen++;
3d396eb1
AK		 969 return NETDEV_TX_OK;
970 }
971
972 if (frag_count > MAX_BUFFERS_PER_CMD) {
5bc51424 973 printk("%s: %s netxen_nic_xmit_frame: frag_count (%d) "
3d396eb1
AK		 974 "too large, can handle only %d frags\n",
975 netxen_nic_driver_name, netdev->name,
976 frag_count, MAX_BUFFERS_PER_CMD);
3176ff3e 977 adapter->stats.txdropped++;
3d396eb1
AK		 978 if ((++dropped_packet & 0xff) == 0xff)
979 printk("%s: %s droppped packets = %d\n",
980 netxen_nic_driver_name, netdev->name,
981 dropped_packet);
982
983 return NETDEV_TX_OK;
984 }
985
3d396eb1
AK		 986 /* There 4 fragments per descriptor */
987 no_of_desc = (frag_count + 3) >> 2;
cb8011ad
AK		 988 if (netdev->features & NETIF_F_TSO) {
989 if (skb_shinfo(skb)->gso_size > 0) {
990
3d396eb1 991 no_of_desc++;
ab6a5bb6 992 if ((ip_hdrlen(skb) + tcp_hdrlen(skb) +
c9bdd4b5 993 sizeof(struct ethhdr)) >
ed25ffa1 994 (sizeof(struct cmd_desc_type0) - 2)) {
cb8011ad
AK		 995 no_of_desc++;
996 }
3d396eb1
AK		 997 }
998 }
53a01e00 999
1000 spin_lock_bh(&adapter->tx_lock);
1001 if (adapter->total_threads >= MAX_XMIT_PRODUCERS) {
1002 goto out_requeue;
1003 }
1004 local_producer = adapter->cmd_producer;
3d396eb1
AK		 1005 k = adapter->cmd_producer;
1006 max_tx_desc_count = adapter->max_tx_desc_count;
1007 last_cmd_consumer = adapter->last_cmd_consumer;
1008 if ((k + no_of_desc) >=
1009 ((last_cmd_consumer <= k) ? last_cmd_consumer + max_tx_desc_count :
1010 last_cmd_consumer)) {
53a01e00 1011 goto out_requeue;
3d396eb1
AK		 1012 }
1013 k = get_index_range(k, max_tx_desc_count, no_of_desc);
1014 adapter->cmd_producer = k;
1015 adapter->total_threads++;
1016 adapter->num_threads++;
1017
1018 spin_unlock_bh(&adapter->tx_lock);
1019 /* Copy the descriptors into the hardware */
1020 producer = local_producer;
1021 saved_producer = producer;
1022 hwdesc = &hw->cmd_desc_head[producer];
1023 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
1024 /* Take skb->data itself */
1025 pbuf = &adapter->cmd_buf_arr[producer];
cb8011ad 1026 if ((netdev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size > 0) {
a608ab9c 1027 pbuf->mss = skb_shinfo(skb)->gso_size;
ed33ebe4 1028 hwdesc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
3d396eb1
AK		 1029 } else {
1030 pbuf->mss = 0;
1031 hwdesc->mss = 0;
1032 }
3d396eb1
AK		 1033 pbuf->total_length = skb->len;
1034 pbuf->skb = skb;
1035 pbuf->cmd = TX_ETHER_PKT;
1036 pbuf->frag_count = frag_count;
3176ff3e 1037 pbuf->port = adapter->portnum;
3d396eb1 1038 buffrag = &pbuf->frag_array[0];
3176ff3e 1039 buffrag->dma = pci_map_single(adapter->pdev, skb->data, first_seg_len,
3d396eb1
AK		 1040 PCI_DMA_TODEVICE);
1041 buffrag->length = first_seg_len;
ed25ffa1
AK		 1042 netxen_set_cmd_desc_totallength(hwdesc, skb->len);
1043 netxen_set_cmd_desc_num_of_buff(hwdesc, frag_count);
1044 netxen_set_cmd_desc_opcode(hwdesc, TX_ETHER_PKT);
3d396eb1 1045
3176ff3e 1046 netxen_set_cmd_desc_port(hwdesc, adapter->portnum);
6c80b18d 1047 netxen_set_cmd_desc_ctxid(hwdesc, adapter->portnum);
3d396eb1
AK		 1048 hwdesc->buffer1_length = cpu_to_le16(first_seg_len);
1049 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
1050
1051 for (i = 1, k = 1; i < frag_count; i++, k++) {
1052 struct skb_frag_struct *frag;
1053 int len, temp_len;
1054 unsigned long offset;
1055 dma_addr_t temp_dma;
1056
1057 /* move to next desc. if there is a need */
1058 if ((i & 0x3) == 0) {
1059 k = 0;
1060 producer = get_next_index(producer,
1061 adapter->max_tx_desc_count);
1062 hwdesc = &hw->cmd_desc_head[producer];
1063 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
53a01e00 1064 pbuf = &adapter->cmd_buf_arr[producer];
1065 pbuf->skb = NULL;
3d396eb1
AK		 1066 }
1067 frag = &skb_shinfo(skb)->frags[i - 1];
1068 len = frag->size;
1069 offset = frag->page_offset;
1070
1071 temp_len = len;
3176ff3e 1072 temp_dma = pci_map_page(adapter->pdev, frag->page, offset,
3d396eb1
AK		 1073 len, PCI_DMA_TODEVICE);
1074
1075 buffrag++;
1076 buffrag->dma = temp_dma;
1077 buffrag->length = temp_len;
1078
1079 DPRINTK(INFO, "for loop. i=%d k=%d\n", i, k);
1080 switch (k) {
1081 case 0:
1082 hwdesc->buffer1_length = cpu_to_le16(temp_len);
1083 hwdesc->addr_buffer1 = cpu_to_le64(temp_dma);
1084 break;
1085 case 1:
1086 hwdesc->buffer2_length = cpu_to_le16(temp_len);
1087 hwdesc->addr_buffer2 = cpu_to_le64(temp_dma);
1088 break;
1089 case 2:
1090 hwdesc->buffer3_length = cpu_to_le16(temp_len);
1091 hwdesc->addr_buffer3 = cpu_to_le64(temp_dma);
1092 break;
1093 case 3:
a608ab9c 1094 hwdesc->buffer4_length = cpu_to_le16(temp_len);
3d396eb1
AK		 1095 hwdesc->addr_buffer4 = cpu_to_le64(temp_dma);
1096 break;
1097 }
1098 frag++;
1099 }
1100 producer = get_next_index(producer, adapter->max_tx_desc_count);
1101
1102 /* might change opcode to TX_TCP_LSO */
1103 netxen_tso_check(adapter, &hw->cmd_desc_head[saved_producer], skb);
1104
1105 /* For LSO, we need to copy the MAC/IP/TCP headers into
1106 * the descriptor ring
1107 */
ed25ffa1
AK		 1108 if (netxen_get_cmd_desc_opcode(&hw->cmd_desc_head[saved_producer])
1109 == TX_TCP_LSO) {
3d396eb1
AK		 1110 int hdr_len, first_hdr_len, more_hdr;
1111 hdr_len = hw->cmd_desc_head[saved_producer].total_hdr_length;
ed25ffa1
AK		 1112 if (hdr_len > (sizeof(struct cmd_desc_type0) - 2)) {
1113 first_hdr_len = sizeof(struct cmd_desc_type0) - 2;
3d396eb1
AK		 1114 more_hdr = 1;
1115 } else {
1116 first_hdr_len = hdr_len;
1117 more_hdr = 0;
1118 }
1119 /* copy the MAC/IP/TCP headers to the cmd descriptor list */
1120 hwdesc = &hw->cmd_desc_head[producer];
53a01e00 1121 pbuf = &adapter->cmd_buf_arr[producer];
1122 pbuf->skb = NULL;
3d396eb1
AK		 1123
1124 /* copy the first 64 bytes */
ed25ffa1 1125 memcpy(((void *)hwdesc) + 2,
3d396eb1
AK		 1126 (void *)(skb->data), first_hdr_len);
1127 producer = get_next_index(producer, max_tx_desc_count);
1128
1129 if (more_hdr) {
1130 hwdesc = &hw->cmd_desc_head[producer];
53a01e00 1131 pbuf = &adapter->cmd_buf_arr[producer];
1132 pbuf->skb = NULL;
3d396eb1
AK		 1133 /* copy the next 64 bytes - should be enough except
1134 * for pathological case
1135 */
d626f62b
ACM		 1136 skb_copy_from_linear_data_offset(skb, first_hdr_len,
1137 hwdesc,
1138 (hdr_len -
1139 first_hdr_len));
3d396eb1
AK		 1140 producer = get_next_index(producer, max_tx_desc_count);
1141 }
1142 }
6c80b18d 1143
3d396eb1 1144 spin_lock_bh(&adapter->tx_lock);
5dc16268 1145 adapter->stats.txbytes += skb->len;
6c80b18d 1146
3d396eb1
AK		 1147 /* Code to update the adapter considering how many producer threads
1148 are currently working */
1149 if ((--adapter->num_threads) == 0) {
1150 /* This is the last thread */
1151 u32 crb_producer = adapter->cmd_producer;
3176ff3e 1152 netxen_nic_update_cmd_producer(adapter, crb_producer);
3d396eb1
AK		 1153 wmb();
1154 adapter->total_threads = 0;
3d396eb1
AK		 1155 }
1156
3176ff3e 1157 adapter->stats.xmitfinished++;
3d396eb1
AK		 1158 netdev->trans_start = jiffies;
1159
53a01e00 1160 spin_unlock_bh(&adapter->tx_lock);
3d396eb1 1161 return NETDEV_TX_OK;
53a01e00 1162
1163out_requeue:
1164 netif_stop_queue(netdev);
1165 adapter->flags |= NETXEN_NETDEV_STATUS;
1166
1167 spin_unlock_bh(&adapter->tx_lock);
1168 return NETDEV_TX_BUSY;
3d396eb1
AK		 1169}
1170
1171static void netxen_watchdog(unsigned long v)
1172{
1173 struct netxen_adapter *adapter = (struct netxen_adapter *)v;
ed25ffa1
AK		 1174
1175 SCHEDULE_WORK(&adapter->watchdog_task);
3d396eb1
AK		 1176}
1177
1178static void netxen_tx_timeout(struct net_device *netdev)
1179{
3176ff3e
MT		 1180 struct netxen_adapter *adapter = (struct netxen_adapter *)
1181 netdev_priv(netdev);
1182 SCHEDULE_WORK(&adapter->tx_timeout_task);
3d396eb1
AK		 1183}
1184
6d5aefb8 1185static void netxen_tx_timeout_task(struct work_struct *work)
3d396eb1 1186{
4790654c 1187 struct netxen_adapter *adapter =
3176ff3e 1188 container_of(work, struct netxen_adapter, tx_timeout_task);
3d396eb1
AK		 1189
1190 printk(KERN_ERR "%s %s: transmit timeout, resetting.\n",
6c80b18d 1191 netxen_nic_driver_name, adapter->netdev->name);
3d396eb1 1192
6c80b18d
MT		 1193 netxen_nic_close(adapter->netdev);
1194 netxen_nic_open(adapter->netdev);
6c80b18d
MT		 1195 adapter->netdev->trans_start = jiffies;
1196 netif_wake_queue(adapter->netdev);
3d396eb1
AK		 1197}
1198
1199static int
1200netxen_handle_int(struct netxen_adapter *adapter, struct net_device *netdev)
1201{
1202 u32 ret = 0;
1203
1204 DPRINTK(INFO, "Entered handle ISR\n");
595e3fb8 1205 adapter->stats.ints++;
3d396eb1 1206
2d1a3bbd 1207 netxen_nic_disable_int(adapter);
1208
3d396eb1 1209 if (netxen_nic_rx_has_work(adapter) || netxen_nic_tx_has_work(adapter)) {
bea3348e 1210 if (netif_rx_schedule_prep(netdev, &adapter->napi)) {
3d396eb1
AK		 1211 /*
1212 * Interrupts are already disabled.
1213 */
bea3348e 1214 __netif_rx_schedule(netdev, &adapter->napi);
3d396eb1
AK		 1215 } else {
1216 static unsigned int intcount = 0;
1217 if ((++intcount & 0xfff) == 0xfff)
2d1a3bbd 1218 DPRINTK(KERN_ERR
3d396eb1
AK		 1219 "%s: %s interrupt %d while in poll\n",
1220 netxen_nic_driver_name, netdev->name,
1221 intcount);
1222 }
1223 ret = 1;
1224 }
1225
1226 if (ret == 0) {
1227 netxen_nic_enable_int(adapter);
1228 }
1229
1230 return ret;
1231}
1232
1233/*
1234 * netxen_intr - Interrupt Handler
1235 * @irq: interrupt number
1236 * data points to adapter stucture (which may be handling more than 1 port
1237 */
1494a814 1238irqreturn_t netxen_intr(int irq, void *data)
3d396eb1 1239{
1daec86a
JG		 1240 struct netxen_adapter *adapter = data;
1241 struct net_device *netdev = adapter->netdev;
e01872af 1242 u32 our_int = 0;
3d396eb1 1243
e01872af 1244 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
1245 our_int = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
1246 /* not our interrupt */
1247 if ((our_int & (0x80 << adapter->portnum)) == 0)
1248 return IRQ_NONE;
1249 }
1250
1251 if (adapter->intr_scheme == INTR_SCHEME_PERPORT) {
1252 /* claim interrupt */
1253 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
1254 writel(our_int & ~((u32)(0x80 << adapter->portnum)),
1255 NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
1256 }
1257 }
1258
3176ff3e
MT		 1259 if (netif_running(netdev))
1260 netxen_handle_int(adapter, netdev);
3d396eb1
AK		 1261
1262 return IRQ_HANDLED;
1263}
1264
bea3348e 1265static int netxen_nic_poll(struct napi_struct *napi, int budget)
3d396eb1 1266{
bea3348e
SH		 1267 struct netxen_adapter *adapter = container_of(napi, struct netxen_adapter, napi);
1268 struct net_device *netdev = adapter->netdev;
3d396eb1
AK		 1269 int done = 1;
1270 int ctx;
bea3348e 1271 int work_done;
3d396eb1
AK		 1272
1273 DPRINTK(INFO, "polling for %d descriptors\n", *budget);
3d396eb1 1274
80922fbc 1275 work_done = 0;
3d396eb1
AK		 1276 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
1277 /*
1278 * Fairness issue. This will give undue weight to the
1279 * receive context 0.
1280 */
1281
1282 /*
1283 * To avoid starvation, we give each of our receivers,
1284 * a fraction of the quota. Sometimes, it might happen that we
1285 * have enough quota to process every packet, but since all the
1286 * packets are on one context, it gets only half of the quota,
1287 * and ends up not processing it.
1288 */
bea3348e
SH		 1289 work_done += netxen_process_rcv_ring(adapter, ctx,
1290 budget / MAX_RCV_CTX);
3d396eb1
AK		 1291 }
1292
1706287f 1293 if (work_done >= budget)
3d396eb1
AK		 1294 done = 0;
1295
ed25ffa1
AK		 1296 if (netxen_process_cmd_ring((unsigned long)adapter) == 0)
1297 done = 0;
3d396eb1
AK		 1298
1299 DPRINTK(INFO, "new work_done: %d work_to_do: %d\n",
80922fbc 1300 work_done, work_to_do);
3d396eb1 1301 if (done) {
bea3348e 1302 netif_rx_complete(netdev, napi);
3d396eb1
AK		 1303 netxen_nic_enable_int(adapter);
1304 }
1305
bea3348e 1306 return work_done;
3d396eb1
AK		 1307}
1308
1309#ifdef CONFIG_NET_POLL_CONTROLLER
1310static void netxen_nic_poll_controller(struct net_device *netdev)
1311{
3176ff3e 1312 struct netxen_adapter *adapter = netdev_priv(netdev);
3d396eb1 1313 disable_irq(adapter->irq);
1494a814 1314 netxen_intr(adapter->irq, adapter);
3d396eb1
AK		 1315 enable_irq(adapter->irq);
1316}
1317#endif
3d396eb1
AK		 1318
1319static struct pci_driver netxen_driver = {
1320 .name = netxen_nic_driver_name,
1321 .id_table = netxen_pci_tbl,
1322 .probe = netxen_nic_probe,
1323 .remove = __devexit_p(netxen_nic_remove)
1324};
1325
1326/* Driver Registration on NetXen card */
1327
1328static int __init netxen_init_module(void)
1329{
79ea13ce 1330 if ((netxen_workq = create_singlethread_workqueue("netxen")) == NULL)
ed25ffa1
AK		 1331 return -ENOMEM;
1332
184231bd 1333 return pci_register_driver(&netxen_driver);
3d396eb1
AK		 1334}
1335
1336module_init(netxen_init_module);
1337
1338static void __exit netxen_exit_module(void)
1339{
1340 /*
1341 * Wait for some time to allow the dma to drain, if any.
1342 */
96acb6eb 1343 msleep(100);
3d396eb1 1344 pci_unregister_driver(&netxen_driver);
9de06610 1345 destroy_workqueue(netxen_workq);
3d396eb1
AK		 1346}
1347
1348module_exit(netxen_exit_module);
Linux 6.x block layer and io_uring tree(s)