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ibm_newemac: select CRC32 in Kconfig
[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 65static void netxen_watchdog(unsigned long);
bea3348e 66static int netxen_nic_poll(struct napi_struct *napi, int budget);
3d396eb1
AK		 67#ifdef CONFIG_NET_POLL_CONTROLLER
68static void netxen_nic_poll_controller(struct net_device *netdev);
69#endif
1494a814 70static irqreturn_t netxen_intr(int irq, void *data);
05aaa02d 71static irqreturn_t netxen_msi_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
b1555130
AB		 89/*
90 * In netxen_nic_down(), we must wait for any pending callback requests into
91 * netxen_watchdog_task() to complete; eg otherwise the watchdog_timer could be
92 * reenabled right after it is deleted in netxen_nic_down().
93 * FLUSH_SCHEDULED_WORK() does this synchronization.
94 *
95 * Normally, schedule_work()/flush_scheduled_work() could have worked, but
96 * netxen_nic_close() is invoked with kernel rtnl lock held. netif_carrier_off()
97 * call in netxen_nic_close() triggers a schedule_work(&linkwatch_work), and a
98 * subsequent call to flush_scheduled_work() in netxen_nic_down() would cause
99 * linkwatch_event() to be executed which also attempts to acquire the rtnl
100 * lock thus causing a deadlock.
101 */
102
103static struct workqueue_struct *netxen_workq;
104#define SCHEDULE_WORK(tp) queue_work(netxen_workq, tp)
105#define FLUSH_SCHEDULED_WORK() flush_workqueue(netxen_workq)
106
ed25ffa1
AK		 107static void netxen_watchdog(unsigned long);
108
993fb90c
AB		 109static void netxen_nic_update_cmd_producer(struct netxen_adapter *adapter,
110 uint32_t crb_producer)
3176ff3e
MT		 111{
112 switch (adapter->portnum) {
113 case 0:
114 writel(crb_producer, NETXEN_CRB_NORMALIZE
115 (adapter, CRB_CMD_PRODUCER_OFFSET));
116 return;
117 case 1:
118 writel(crb_producer, NETXEN_CRB_NORMALIZE
119 (adapter, CRB_CMD_PRODUCER_OFFSET_1));
120 return;
121 case 2:
122 writel(crb_producer, NETXEN_CRB_NORMALIZE
123 (adapter, CRB_CMD_PRODUCER_OFFSET_2));
124 return;
125 case 3:
126 writel(crb_producer, NETXEN_CRB_NORMALIZE
127 (adapter, CRB_CMD_PRODUCER_OFFSET_3));
128 return;
129 default:
130 printk(KERN_WARNING "We tried to update "
131 "CRB_CMD_PRODUCER_OFFSET for invalid "
132 "PCI function id %d\n",
133 adapter->portnum);
134 return;
135 }
136}
137
993fb90c
AB		 138static void netxen_nic_update_cmd_consumer(struct netxen_adapter *adapter,
139 u32 crb_consumer)
3176ff3e
MT		 140{
141 switch (adapter->portnum) {
142 case 0:
143 writel(crb_consumer, NETXEN_CRB_NORMALIZE
144 (adapter, CRB_CMD_CONSUMER_OFFSET));
145 return;
146 case 1:
147 writel(crb_consumer, NETXEN_CRB_NORMALIZE
148 (adapter, CRB_CMD_CONSUMER_OFFSET_1));
149 return;
150 case 2:
151 writel(crb_consumer, NETXEN_CRB_NORMALIZE
152 (adapter, CRB_CMD_CONSUMER_OFFSET_2));
153 return;
154 case 3:
155 writel(crb_consumer, NETXEN_CRB_NORMALIZE
156 (adapter, CRB_CMD_CONSUMER_OFFSET_3));
157 return;
158 default:
159 printk(KERN_WARNING "We tried to update "
160 "CRB_CMD_PRODUCER_OFFSET for invalid "
161 "PCI function id %d\n",
162 adapter->portnum);
163 return;
164 }
165}
166
167#define ADAPTER_LIST_SIZE 12
3176ff3e 168
443be796
DP		 169static uint32_t msi_tgt_status[4] = {
170 ISR_INT_TARGET_STATUS, ISR_INT_TARGET_STATUS_F1,
171 ISR_INT_TARGET_STATUS_F2, ISR_INT_TARGET_STATUS_F3
172};
173
174static uint32_t sw_int_mask[4] = {
175 CRB_SW_INT_MASK_0, CRB_SW_INT_MASK_1,
176 CRB_SW_INT_MASK_2, CRB_SW_INT_MASK_3
177};
178
4638aef1
SH		 179static void netxen_nic_disable_int(struct netxen_adapter *adapter)
180{
443be796 181 u32 mask = 0x7ff;
4638aef1 182 int retries = 32;
443be796
DP		 183 int port = adapter->portnum;
184 int pci_fn = adapter->ahw.pci_func;
4638aef1 185
f0c88f9c 186 if (adapter->msi_mode != MSI_MODE_MULTIFUNC)
443be796 187 writel(0x0, NETXEN_CRB_NORMALIZE(adapter, sw_int_mask[port]));
4638aef1
SH		 188
189 if (adapter->intr_scheme != -1 &&
190 adapter->intr_scheme != INTR_SCHEME_PERPORT)
191 writel(mask,PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_MASK));
192
4638aef1
SH		 193 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
194 do {
195 writel(0xffffffff,
196 PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_TARGET_STATUS));
197 mask = readl(pci_base_offset(adapter, ISR_INT_VECTOR));
198 if (!(mask & 0x80))
199 break;
200 udelay(10);
201 } while (--retries);
202
203 if (!retries) {
204 printk(KERN_NOTICE "%s: Failed to disable interrupt completely\n",
205 netxen_nic_driver_name);
206 }
443be796
DP		 207 } else {
208 if (adapter->msi_mode == MSI_MODE_MULTIFUNC) {
209 writel(0xffffffff, PCI_OFFSET_SECOND_RANGE(adapter,
210 msi_tgt_status[pci_fn]));
211 }
4638aef1 212 }
4638aef1
SH		 213}
214
215static void netxen_nic_enable_int(struct netxen_adapter *adapter)
216{
217 u32 mask;
443be796 218 int port = adapter->portnum;
4638aef1
SH		 219
220 DPRINTK(1, INFO, "Entered ISR Enable \n");
221
222 if (adapter->intr_scheme != -1 &&
223 adapter->intr_scheme != INTR_SCHEME_PERPORT) {
224 switch (adapter->ahw.board_type) {
225 case NETXEN_NIC_GBE:
226 mask = 0x77b;
227 break;
228 case NETXEN_NIC_XGBE:
229 mask = 0x77f;
230 break;
231 default:
232 mask = 0x7ff;
233 break;
234 }
235
236 writel(mask, PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_MASK));
237 }
238
443be796 239 writel(0x1, NETXEN_CRB_NORMALIZE(adapter, sw_int_mask[port]));
4638aef1
SH		 240
241 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
242 mask = 0xbff;
243 if (adapter->intr_scheme != -1 &&
244 adapter->intr_scheme != INTR_SCHEME_PERPORT) {
245 writel(0X0, NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
246 }
247 writel(mask,
248 PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_TARGET_MASK));
249 }
250
251 DPRINTK(1, INFO, "Done with enable Int\n");
252}
253
3d396eb1
AK		 254/*
255 * netxen_nic_probe()
256 *
257 * The Linux system will invoke this after identifying the vendor ID and
258 * device Id in the pci_tbl supported by this module.
259 *
260 * A quad port card has one operational PCI config space, (function 0),
261 * which is used to access all four ports.
262 *
263 * This routine will initialize the adapter, and setup the global parameters
264 * along with the port's specific structure.
265 */
266static int __devinit
267netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
268{
269 struct net_device *netdev = NULL;
270 struct netxen_adapter *adapter = NULL;
ed25ffa1
AK		 271 void __iomem *mem_ptr0 = NULL;
272 void __iomem *mem_ptr1 = NULL;
273 void __iomem *mem_ptr2 = NULL;
6c80b18d
MT		 274 unsigned long first_page_group_end;
275 unsigned long first_page_group_start;
276
cb8011ad 277
a608ab9c 278 u8 __iomem *db_ptr = NULL;
ed25ffa1 279 unsigned long mem_base, mem_len, db_base, db_len;
3176ff3e 280 int pci_using_dac, i = 0, err;
3d396eb1
AK		 281 int ring;
282 struct netxen_recv_context *recv_ctx = NULL;
283 struct netxen_rcv_desc_ctx *rcv_desc = NULL;
284 struct netxen_cmd_buffer *cmd_buf_arr = NULL;
f305f789 285 __le64 mac_addr[FLASH_NUM_PORTS + 1];
6c80b18d
MT		 286 int valid_mac = 0;
287 u32 val;
3176ff3e 288 int pci_func_id = PCI_FUNC(pdev->devfn);
0795af57 289 DECLARE_MAC_BUF(mac);
3d396eb1 290
cb8011ad 291 printk(KERN_INFO "%s \n", netxen_nic_driver_string);
6c80b18d 292
3176ff3e 293 if (pdev->class != 0x020000) {
5bc51424 294 printk(KERN_ERR"NetXen function %d, class %x will not "
3176ff3e 295 "be enabled.\n",pci_func_id, pdev->class);
ed25ffa1
AK		 296 return -ENODEV;
297 }
3d396eb1
AK		 298 if ((err = pci_enable_device(pdev)))
299 return err;
300 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
301 err = -ENODEV;
302 goto err_out_disable_pdev;
303 }
304
305 if ((err = pci_request_regions(pdev, netxen_nic_driver_name)))
306 goto err_out_disable_pdev;
307
308 pci_set_master(pdev);
44c10138 309 if (pdev->revision == NX_P2_C1 &&
ed25ffa1
AK		 310 (pci_set_dma_mask(pdev, DMA_35BIT_MASK) == 0) &&
311 (pci_set_consistent_dma_mask(pdev, DMA_35BIT_MASK) == 0)) {
3d396eb1 312 pci_using_dac = 1;
ed25ffa1 313 } else {
3d396eb1
AK		 314 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) ||
315 (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK)))
316 goto err_out_free_res;
317
318 pci_using_dac = 0;
319 }
320
3176ff3e
MT		 321
322 netdev = alloc_etherdev(sizeof(struct netxen_adapter));
323 if(!netdev) {
324 printk(KERN_ERR"%s: Failed to allocate memory for the "
325 "device block.Check system memory resource"
326 " usage.\n", netxen_nic_driver_name);
327 goto err_out_free_res;
328 }
329
3176ff3e
MT		 330 SET_NETDEV_DEV(netdev, &pdev->dev);
331
332 adapter = netdev->priv;
3176ff3e
MT		 333
334 adapter->ahw.pdev = pdev;
13ba9c77
MT		 335 adapter->ahw.pci_func = pci_func_id;
336
3d396eb1
AK		 337 /* remap phys address */
338 mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */
339 mem_len = pci_resource_len(pdev, 0);
340
341 /* 128 Meg of memory */
6c80b18d
MT		 342 if (mem_len == NETXEN_PCI_128MB_SIZE) {
343 mem_ptr0 = ioremap(mem_base, FIRST_PAGE_GROUP_SIZE);
344 mem_ptr1 = ioremap(mem_base + SECOND_PAGE_GROUP_START,
345 SECOND_PAGE_GROUP_SIZE);
346 mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START,
347 THIRD_PAGE_GROUP_SIZE);
348 first_page_group_start = FIRST_PAGE_GROUP_START;
349 first_page_group_end = FIRST_PAGE_GROUP_END;
350 } else if (mem_len == NETXEN_PCI_32MB_SIZE) {
351 mem_ptr1 = ioremap(mem_base, SECOND_PAGE_GROUP_SIZE);
352 mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START -
353 SECOND_PAGE_GROUP_START, THIRD_PAGE_GROUP_SIZE);
354 first_page_group_start = 0;
355 first_page_group_end = 0;
356 } else {
4790654c 357 err = -EIO;
6c80b18d
MT		 358 goto err_out_free_netdev;
359 }
cb8011ad 360
79ea13ce
AV		 361 if ((!mem_ptr0 && mem_len == NETXEN_PCI_128MB_SIZE) ||
362 !mem_ptr1 || !mem_ptr2) {
ed25ffa1 363 DPRINTK(ERR,
cb8011ad
AK		 364 "Cannot remap adapter memory aborting.:"
365 "0 -> %p, 1 -> %p, 2 -> %p\n",
366 mem_ptr0, mem_ptr1, mem_ptr2);
367
3d396eb1 368 err = -EIO;
ed25ffa1
AK		 369 goto err_out_iounmap;
370 }
371 db_base = pci_resource_start(pdev, 4); /* doorbell is on bar 4 */
372 db_len = pci_resource_len(pdev, 4);
373
374 if (db_len == 0) {
375 printk(KERN_ERR "%s: doorbell is disabled\n",
376 netxen_nic_driver_name);
377 err = -EIO;
378 goto err_out_iounmap;
379 }
380 DPRINTK(INFO, "doorbell ioremap from %lx a size of %lx\n", db_base,
381 db_len);
382
383 db_ptr = ioremap(db_base, NETXEN_DB_MAPSIZE_BYTES);
a608ab9c 384 if (!db_ptr) {
ed25ffa1
AK		 385 printk(KERN_ERR "%s: Failed to allocate doorbell map.",
386 netxen_nic_driver_name);
387 err = -EIO;
388 goto err_out_iounmap;
3d396eb1 389 }
ed25ffa1 390 DPRINTK(INFO, "doorbell ioremaped at %p\n", db_ptr);
3d396eb1 391
6c80b18d
MT		 392 adapter->ahw.pci_base0 = mem_ptr0;
393 adapter->ahw.first_page_group_start = first_page_group_start;
394 adapter->ahw.first_page_group_end = first_page_group_end;
395 adapter->ahw.pci_base1 = mem_ptr1;
396 adapter->ahw.pci_base2 = mem_ptr2;
397 adapter->ahw.db_base = db_ptr;
398 adapter->ahw.db_len = db_len;
3d396eb1 399
3176ff3e
MT		 400 adapter->netdev = netdev;
401 adapter->pdev = pdev;
2d1a3bbd 402
bea3348e
SH		 403 netif_napi_add(netdev, &adapter->napi,
404 netxen_nic_poll, NETXEN_NETDEV_WEIGHT);
405
2d1a3bbd 406 /* this will be read from FW later */
407 adapter->intr_scheme = -1;
443be796 408 adapter->msi_mode = -1;
2d1a3bbd 409
410 /* This will be reset for mezz cards */
3176ff3e 411 adapter->portnum = pci_func_id;
2d1a3bbd 412 adapter->status &= ~NETXEN_NETDEV_STATUS;
200eef20 413 adapter->rx_csum = 1;
3176ff3e
MT		 414
415 netdev->open = netxen_nic_open;
416 netdev->stop = netxen_nic_close;
417 netdev->hard_start_xmit = netxen_nic_xmit_frame;
4790654c 418 netdev->get_stats = netxen_nic_get_stats;
3176ff3e
MT		 419 netdev->set_multicast_list = netxen_nic_set_multi;
420 netdev->set_mac_address = netxen_nic_set_mac;
421 netdev->change_mtu = netxen_nic_change_mtu;
422 netdev->tx_timeout = netxen_tx_timeout;
05aaa02d 423 netdev->watchdog_timeo = 2*HZ;
3176ff3e
MT		 424
425 netxen_nic_change_mtu(netdev, netdev->mtu);
426
427 SET_ETHTOOL_OPS(netdev, &netxen_nic_ethtool_ops);
3176ff3e
MT		 428#ifdef CONFIG_NET_POLL_CONTROLLER
429 netdev->poll_controller = netxen_nic_poll_controller;
430#endif
431 /* ScatterGather support */
432 netdev->features = NETIF_F_SG;
433 netdev->features |= NETIF_F_IP_CSUM;
434 netdev->features |= NETIF_F_TSO;
435
436 if (pci_using_dac)
437 netdev->features |= NETIF_F_HIGHDMA;
438
644caeef 439 if (pci_enable_msi(pdev))
3176ff3e 440 adapter->flags &= ~NETXEN_NIC_MSI_ENABLED;
644caeef 441 else
3176ff3e
MT		 442 adapter->flags |= NETXEN_NIC_MSI_ENABLED;
443
6c80b18d
MT		 444 netdev->irq = pdev->irq;
445 INIT_WORK(&adapter->tx_timeout_task, netxen_tx_timeout_task);
446
447 /*
448 * Set the CRB window to invalid. If any register in window 0 is
449 * accessed it should set the window to 0 and then reset it to 1.
450 */
451 adapter->curr_window = 255;
452
453 /* initialize the adapter */
454 netxen_initialize_adapter_hw(adapter);
455
6c80b18d
MT		 456 /*
457 * Adapter in our case is quad port so initialize it before
458 * initializing the ports
459 */
460
461 netxen_initialize_adapter_ops(adapter);
462
463 adapter->max_tx_desc_count = MAX_CMD_DESCRIPTORS_HOST;
464 if ((adapter->ahw.boardcfg.board_type == NETXEN_BRDTYPE_P2_SB35_4G) ||
4790654c
JG		 465 (adapter->ahw.boardcfg.board_type ==
466 NETXEN_BRDTYPE_P2_SB31_2G))
6c80b18d
MT		 467 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_1G;
468 else
469 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS;
470 adapter->max_jumbo_rx_desc_count = MAX_JUMBO_RCV_DESCRIPTORS;
471 adapter->max_lro_rx_desc_count = MAX_LRO_RCV_DESCRIPTORS;
472
3d396eb1
AK		 473 cmd_buf_arr = (struct netxen_cmd_buffer *)vmalloc(TX_RINGSIZE);
474 if (cmd_buf_arr == NULL) {
ed25ffa1
AK		 475 printk(KERN_ERR
476 "%s: Could not allocate cmd_buf_arr memory:%d\n",
477 netxen_nic_driver_name, (int)TX_RINGSIZE);
3d396eb1
AK		 478 err = -ENOMEM;
479 goto err_out_free_adapter;
480 }
481 memset(cmd_buf_arr, 0, TX_RINGSIZE);
6c80b18d 482 adapter->cmd_buf_arr = cmd_buf_arr;
3d396eb1
AK		 483
484 for (i = 0; i < MAX_RCV_CTX; ++i) {
485 recv_ctx = &adapter->recv_ctx[i];
486 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
487 rcv_desc = &recv_ctx->rcv_desc[ring];
488 switch (RCV_DESC_TYPE(ring)) {
489 case RCV_DESC_NORMAL:
490 rcv_desc->max_rx_desc_count =
491 adapter->max_rx_desc_count;
492 rcv_desc->flags = RCV_DESC_NORMAL;
493 rcv_desc->dma_size = RX_DMA_MAP_LEN;
494 rcv_desc->skb_size = MAX_RX_BUFFER_LENGTH;
495 break;
496
497 case RCV_DESC_JUMBO:
498 rcv_desc->max_rx_desc_count =
499 adapter->max_jumbo_rx_desc_count;
500 rcv_desc->flags = RCV_DESC_JUMBO;
501 rcv_desc->dma_size = RX_JUMBO_DMA_MAP_LEN;
502 rcv_desc->skb_size = MAX_RX_JUMBO_BUFFER_LENGTH;
503 break;
504
ed25ffa1
AK		 505 case RCV_RING_LRO:
506 rcv_desc->max_rx_desc_count =
507 adapter->max_lro_rx_desc_count;
508 rcv_desc->flags = RCV_DESC_LRO;
509 rcv_desc->dma_size = RX_LRO_DMA_MAP_LEN;
510 rcv_desc->skb_size = MAX_RX_LRO_BUFFER_LENGTH;
511 break;
512
3d396eb1
AK		 513 }
514 rcv_desc->rx_buf_arr = (struct netxen_rx_buffer *)
515 vmalloc(RCV_BUFFSIZE);
516
517 if (rcv_desc->rx_buf_arr == NULL) {
5bc51424 518 printk(KERN_ERR "%s: Could not allocate "
ed25ffa1
AK		 519 "rcv_desc->rx_buf_arr memory:%d\n",
520 netxen_nic_driver_name,
521 (int)RCV_BUFFSIZE);
3d396eb1
AK		 522 err = -ENOMEM;
523 goto err_out_free_rx_buffer;
524 }
525 memset(rcv_desc->rx_buf_arr, 0, RCV_BUFFSIZE);
526 }
527
528 }
529
ed25ffa1 530 netxen_initialize_adapter_sw(adapter); /* initialize the buffers in adapter */
6c80b18d 531
13ba9c77 532 /* Mezz cards have PCI function 0,2,3 enabled */
6c80b18d
MT		 533 if ((adapter->ahw.boardcfg.board_type == NETXEN_BRDTYPE_P2_SB31_10G_IMEZ)
534 && (pci_func_id >= 2))
13ba9c77
MT		 535 adapter->portnum = pci_func_id - 2;
536
cb8011ad 537#ifdef CONFIG_IA64
13ba9c77 538 if(adapter->portnum == 0) {
3176ff3e
MT		 539 netxen_pinit_from_rom(adapter, 0);
540 udelay(500);
541 netxen_load_firmware(adapter);
542 }
cb8011ad
AK		 543#endif
544
3d396eb1
AK		 545 init_timer(&adapter->watchdog_timer);
546 adapter->ahw.xg_linkup = 0;
547 adapter->watchdog_timer.function = &netxen_watchdog;
548 adapter->watchdog_timer.data = (unsigned long)adapter;
6d5aefb8 549 INIT_WORK(&adapter->watchdog_task, netxen_watchdog_task);
3d396eb1 550 adapter->ahw.pdev = pdev;
44c10138 551 adapter->ahw.revision_id = pdev->revision;
3d396eb1 552
6c80b18d
MT		 553 /* make sure Window == 1 */
554 netxen_nic_pci_change_crbwindow(adapter, 1);
555
3176ff3e
MT		 556 netxen_nic_update_cmd_producer(adapter, 0);
557 netxen_nic_update_cmd_consumer(adapter, 0);
6c80b18d 558 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_HOST_CMD_ADDR_LO));
3d396eb1
AK		 559
560 if (netxen_is_flash_supported(adapter) == 0 &&
561 netxen_get_flash_mac_addr(adapter, mac_addr) == 0)
562 valid_mac = 1;
563 else
564 valid_mac = 0;
565
3176ff3e 566 if (valid_mac) {
13ba9c77 567 unsigned char *p = (unsigned char *)&mac_addr[adapter->portnum];
3176ff3e
MT		 568 netdev->dev_addr[0] = *(p + 5);
569 netdev->dev_addr[1] = *(p + 4);
570 netdev->dev_addr[2] = *(p + 3);
571 netdev->dev_addr[3] = *(p + 2);
572 netdev->dev_addr[4] = *(p + 1);
573 netdev->dev_addr[5] = *(p + 0);
574
575 memcpy(netdev->perm_addr, netdev->dev_addr,
576 netdev->addr_len);
577 if (!is_valid_ether_addr(netdev->perm_addr)) {
0795af57
JP		 578 printk(KERN_ERR "%s: Bad MAC address %s.\n",
579 netxen_nic_driver_name,
580 print_mac(mac, netdev->dev_addr));
3176ff3e
MT		 581 } else {
582 if (adapter->macaddr_set)
583 adapter->macaddr_set(adapter,
584 netdev->dev_addr);
585 }
586 }
587
6c80b18d 588 if (adapter->portnum == 0) {
13ba9c77 589 err = netxen_initialize_adapter_offload(adapter);
4790654c 590 if (err)
6c80b18d 591 goto err_out_free_rx_buffer;
4790654c 592 val = readl(NETXEN_CRB_NORMALIZE(adapter,
6c80b18d
MT		 593 NETXEN_CAM_RAM(0x1fc)));
594 if (val == 0x55555555) {
595 /* This is the first boot after power up */
644caeef 596 netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(0x4), &val);
96acb6eb
DP		 597 if (!(val & 0x4)) {
598 val |= 0x4;
599 netxen_nic_write_w0(adapter, NETXEN_PCIE_REG(0x4), val);
600 netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(0x4), &val);
601 if (!(val & 0x4))
602 printk(KERN_ERR "%s: failed to set MSI bit in PCI-e reg\n",
603 netxen_nic_driver_name);
604 }
6c80b18d
MT		 605 val = readl(NETXEN_CRB_NORMALIZE(adapter,
606 NETXEN_ROMUSB_GLB_SW_RESET));
607 printk(KERN_INFO"NetXen: read 0x%08x for reset reg.\n",val);
608 if (val != 0x80000f) {
609 /* clear the register for future unloads/loads */
644caeef 610 writel(0, NETXEN_CRB_NORMALIZE(adapter,
611 NETXEN_CAM_RAM(0x1fc)));
612 printk(KERN_ERR "ERROR in NetXen HW init sequence.\n");
613 err = -ENODEV;
614 goto err_out_free_dev;
6c80b18d 615 }
6c80b18d 616 }
96acb6eb
DP		 617
618 /* clear the register for future unloads/loads */
619 writel(0, NETXEN_CRB_NORMALIZE(adapter, NETXEN_CAM_RAM(0x1fc)));
6c80b18d
MT		 620 printk(KERN_INFO "State: 0x%0x\n",
621 readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)));
622
623 /*
624 * Tell the hardware our version number.
625 */
4790654c 626 i = (_NETXEN_NIC_LINUX_MAJOR << 16)
6c80b18d
MT		 627 | ((_NETXEN_NIC_LINUX_MINOR << 8))
628 | (_NETXEN_NIC_LINUX_SUBVERSION);
629 writel(i, NETXEN_CRB_NORMALIZE(adapter, CRB_DRIVER_VERSION));
3d396eb1 630
3176ff3e
MT		 631 /* Unlock the HW, prompting the boot sequence */
632 writel(1,
633 NETXEN_CRB_NORMALIZE(adapter,
634 NETXEN_ROMUSB_GLB_PEGTUNE_DONE));
635 /* Handshake with the card before we register the devices. */
636 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
637 }
3d396eb1 638
3d396eb1 639 /*
6c80b18d 640 * See if the firmware gave us a virtual-physical port mapping.
3d396eb1 641 */
6c80b18d
MT		 642 i = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_V2P(adapter->portnum)));
643 if (i != 0x55555555)
644 physical_port[adapter->portnum] = i;
645
3176ff3e
MT		 646 netif_carrier_off(netdev);
647 netif_stop_queue(netdev);
648
6c80b18d
MT		 649 if ((err = register_netdev(netdev))) {
650 printk(KERN_ERR "%s: register_netdev failed port #%d"
651 " aborting\n", netxen_nic_driver_name,
652 adapter->portnum);
653 err = -EIO;
654 goto err_out_free_dev;
655 }
656
657 pci_set_drvdata(pdev, adapter);
3d396eb1
AK		 658
659 switch (adapter->ahw.board_type) {
3176ff3e
MT		 660 case NETXEN_NIC_GBE:
661 printk(KERN_INFO "%s: QUAD GbE board initialized\n",
662 netxen_nic_driver_name);
663 break;
3d396eb1 664
3176ff3e 665 case NETXEN_NIC_XGBE:
4790654c 666 printk(KERN_INFO "%s: XGbE board initialized\n",
3176ff3e
MT		 667 netxen_nic_driver_name);
668 break;
3d396eb1
AK		 669 }
670
671 adapter->driver_mismatch = 0;
672
673 return 0;
674
6c80b18d
MT		 675err_out_free_dev:
676 if (adapter->portnum == 0)
677 netxen_free_adapter_offload(adapter);
ed25ffa1 678
6c80b18d 679err_out_free_rx_buffer:
3d396eb1
AK		 680 for (i = 0; i < MAX_RCV_CTX; ++i) {
681 recv_ctx = &adapter->recv_ctx[i];
682 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
683 rcv_desc = &recv_ctx->rcv_desc[ring];
684 if (rcv_desc->rx_buf_arr != NULL) {
685 vfree(rcv_desc->rx_buf_arr);
686 rcv_desc->rx_buf_arr = NULL;
687 }
688 }
689 }
3d396eb1
AK		 690 vfree(cmd_buf_arr);
691
6c80b18d
MT		 692err_out_free_adapter:
693 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
694 pci_disable_msi(pdev);
695
3d396eb1 696 pci_set_drvdata(pdev, NULL);
3d396eb1 697
ed25ffa1
AK		 698 if (db_ptr)
699 iounmap(db_ptr);
700
6c80b18d 701err_out_iounmap:
ed25ffa1
AK		 702 if (mem_ptr0)
703 iounmap(mem_ptr0);
704 if (mem_ptr1)
705 iounmap(mem_ptr1);
706 if (mem_ptr2)
707 iounmap(mem_ptr2);
cb8011ad 708
6c80b18d
MT		 709err_out_free_netdev:
710 free_netdev(netdev);
711
712err_out_free_res:
3d396eb1 713 pci_release_regions(pdev);
6c80b18d
MT		 714
715err_out_disable_pdev:
3d396eb1
AK		 716 pci_disable_device(pdev);
717 return err;
718}
719
720static void __devexit netxen_nic_remove(struct pci_dev *pdev)
721{
722 struct netxen_adapter *adapter;
3176ff3e 723 struct net_device *netdev;
3d396eb1
AK		 724 struct netxen_rx_buffer *buffer;
725 struct netxen_recv_context *recv_ctx;
726 struct netxen_rcv_desc_ctx *rcv_desc;
96acb6eb
DP		 727 int i, ctxid, ring;
728 static int init_firmware_done = 0;
3d396eb1 729
6c80b18d 730 adapter = pci_get_drvdata(pdev);
3d396eb1
AK		 731 if (adapter == NULL)
732 return;
733
6c80b18d
MT		 734 netdev = adapter->netdev;
735
96acb6eb
DP		 736 unregister_netdev(netdev);
737
96acb6eb
DP		 738 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) {
739 init_firmware_done++;
3d396eb1 740 netxen_free_hw_resources(adapter);
96acb6eb 741 }
3d396eb1 742
3d396eb1
AK		 743 for (ctxid = 0; ctxid < MAX_RCV_CTX; ++ctxid) {
744 recv_ctx = &adapter->recv_ctx[ctxid];
745 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
746 rcv_desc = &recv_ctx->rcv_desc[ring];
747 for (i = 0; i < rcv_desc->max_rx_desc_count; ++i) {
748 buffer = &(rcv_desc->rx_buf_arr[i]);
749 if (buffer->state == NETXEN_BUFFER_FREE)
750 continue;
751 pci_unmap_single(pdev, buffer->dma,
752 rcv_desc->dma_size,
753 PCI_DMA_FROMDEVICE);
754 if (buffer->skb != NULL)
755 dev_kfree_skb_any(buffer->skb);
756 }
757 vfree(rcv_desc->rx_buf_arr);
758 }
759 }
760
6c80b18d
MT		 761 vfree(adapter->cmd_buf_arr);
762
96acb6eb
DP		 763 if (adapter->portnum == 0) {
764 if (init_firmware_done) {
96acb6eb 765 i = 100;
ceded32f 766 do {
767 if (dma_watchdog_shutdown_request(adapter) == 1)
768 break;
96acb6eb 769 msleep(100);
ceded32f 770 if (dma_watchdog_shutdown_poll_result(adapter) == 1)
771 break;
772 } while (--i);
96acb6eb 773
ceded32f 774 if (i == 0)
775 printk(KERN_ERR "%s: dma_watchdog_shutdown failed\n",
776 netdev->name);
96acb6eb
DP		 777
778 /* clear the register for future unloads/loads */
779 writel(0, NETXEN_CRB_NORMALIZE(adapter, NETXEN_CAM_RAM(0x1fc)));
780 printk(KERN_INFO "State: 0x%0x\n",
781 readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)));
782
783 /* leave the hw in the same state as reboot */
784 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));
ceded32f 785 netxen_pinit_from_rom(adapter, 0);
96acb6eb 786 msleep(1);
ceded32f 787 netxen_load_firmware(adapter);
96acb6eb
DP		 788 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
789 }
790
791 /* clear the register for future unloads/loads */
792 writel(0, NETXEN_CRB_NORMALIZE(adapter, NETXEN_CAM_RAM(0x1fc)));
793 printk(KERN_INFO "State: 0x%0x\n",
794 readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)));
795
96acb6eb 796 i = 100;
ceded32f 797 do {
798 if (dma_watchdog_shutdown_request(adapter) == 1)
799 break;
96acb6eb 800 msleep(100);
ceded32f 801 if (dma_watchdog_shutdown_poll_result(adapter) == 1)
802 break;
803 } while (--i);
96acb6eb
DP		 804
805 if (i) {
806 netxen_free_adapter_offload(adapter);
807 } else {
ceded32f 808 printk(KERN_ERR "%s: dma_watchdog_shutdown failed\n",
809 netdev->name);
96acb6eb 810 }
96acb6eb
DP		 811 }
812
3052246c 813 if (adapter->irq)
814 free_irq(adapter->irq, adapter);
815
816 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
817 pci_disable_msi(pdev);
818
6c80b18d
MT		 819 iounmap(adapter->ahw.db_base);
820 iounmap(adapter->ahw.pci_base0);
821 iounmap(adapter->ahw.pci_base1);
822 iounmap(adapter->ahw.pci_base2);
595e3fb8
MT		 823
824 pci_release_regions(pdev);
3052246c 825 pci_disable_device(pdev);
595e3fb8
MT		 826 pci_set_drvdata(pdev, NULL);
827
6c80b18d 828 free_netdev(netdev);
3d396eb1
AK		 829}
830
831/*
832 * Called when a network interface is made active
833 * @returns 0 on success, negative value on failure
834 */
835static int netxen_nic_open(struct net_device *netdev)
836{
3176ff3e 837 struct netxen_adapter *adapter = (struct netxen_adapter *)netdev->priv;
3d396eb1
AK		 838 int err = 0;
839 int ctx, ring;
05aaa02d
DP		 840 irq_handler_t handler;
841 unsigned long flags = IRQF_SAMPLE_RANDOM;
3d396eb1
AK		 842
843 if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC) {
844 err = netxen_init_firmware(adapter);
845 if (err != 0) {
846 printk(KERN_ERR "Failed to init firmware\n");
847 return -EIO;
848 }
849 netxen_nic_flash_print(adapter);
850
851 /* setup all the resources for the Phantom... */
852 /* this include the descriptors for rcv, tx, and status */
853 netxen_nic_clear_stats(adapter);
854 err = netxen_nic_hw_resources(adapter);
855 if (err) {
856 printk(KERN_ERR "Error in setting hw resources:%d\n",
857 err);
858 return err;
859 }
3d396eb1 860 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
cb8011ad 861 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++)
3d396eb1 862 netxen_post_rx_buffers(adapter, ctx, ring);
3d396eb1 863 }
ed25ffa1 864 adapter->irq = adapter->ahw.pdev->irq;
05aaa02d
DP		 865 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
866 handler = netxen_msi_intr;
867 else {
868 flags |= IRQF_SHARED;
869 handler = netxen_intr;
870 }
871 err = request_irq(adapter->irq, handler,
872 flags, netdev->name, adapter);
3d396eb1
AK		 873 if (err) {
874 printk(KERN_ERR "request_irq failed with: %d\n", err);
ed25ffa1 875 netxen_free_hw_resources(adapter);
3d396eb1
AK		 876 return err;
877 }
ed25ffa1
AK		 878
879 adapter->is_up = NETXEN_ADAPTER_UP_MAGIC;
880 }
3d396eb1
AK		 881 /* Done here again so that even if phantom sw overwrote it,
882 * we set it */
595e3fb8
MT		 883 if (adapter->init_port
884 && adapter->init_port(adapter, adapter->portnum) != 0) {
885 printk(KERN_ERR "%s: Failed to initialize port %d\n",
886 netxen_nic_driver_name, adapter->portnum);
595e3fb8
MT		 887 return -EIO;
888 }
7eec517c 889 if (adapter->macaddr_set)
890 adapter->macaddr_set(adapter, netdev->dev_addr);
595e3fb8 891
3176ff3e 892 netxen_nic_set_link_parameters(adapter);
3d396eb1
AK		 893
894 netxen_nic_set_multi(netdev);
ed25ffa1 895 if (adapter->set_mtu)
3176ff3e 896 adapter->set_mtu(adapter, netdev->mtu);
ed25ffa1 897
05aaa02d
DP		 898 if (!adapter->driver_mismatch)
899 mod_timer(&adapter->watchdog_timer, jiffies);
900
901 napi_enable(&adapter->napi);
902 netxen_nic_enable_int(adapter);
903
3d396eb1
AK		 904 if (!adapter->driver_mismatch)
905 netif_start_queue(netdev);
906
907 return 0;
908}
909
910/*
911 * netxen_nic_close - Disables a network interface entry point
912 */
913static int netxen_nic_close(struct net_device *netdev)
914{
3176ff3e 915 struct netxen_adapter *adapter = netdev_priv(netdev);
3d396eb1
AK		 916 int i, j;
917 struct netxen_cmd_buffer *cmd_buff;
918 struct netxen_skb_frag *buffrag;
919
920 netif_carrier_off(netdev);
921 netif_stop_queue(netdev);
bea3348e 922 napi_disable(&adapter->napi);
3d396eb1 923
72b0a7a8 924 if (adapter->stop_port)
925 adapter->stop_port(adapter);
926
e01872af 927 netxen_nic_disable_int(adapter);
928
3176ff3e
MT		 929 cmd_buff = adapter->cmd_buf_arr;
930 for (i = 0; i < adapter->max_tx_desc_count; i++) {
931 buffrag = cmd_buff->frag_array;
932 if (buffrag->dma) {
933 pci_unmap_single(adapter->pdev, buffrag->dma,
934 buffrag->length, PCI_DMA_TODEVICE);
96acb6eb 935 buffrag->dma = 0ULL;
3176ff3e
MT		 936 }
937 for (j = 0; j < cmd_buff->frag_count; j++) {
938 buffrag++;
3d396eb1 939 if (buffrag->dma) {
3176ff3e 940 pci_unmap_page(adapter->pdev, buffrag->dma,
4790654c 941 buffrag->length,
3176ff3e 942 PCI_DMA_TODEVICE);
96acb6eb 943 buffrag->dma = 0ULL;
3d396eb1 944 }
3d396eb1 945 }
3176ff3e
MT		 946 /* Free the skb we received in netxen_nic_xmit_frame */
947 if (cmd_buff->skb) {
948 dev_kfree_skb_any(cmd_buff->skb);
949 cmd_buff->skb = NULL;
950 }
951 cmd_buff++;
3d396eb1 952 }
96acb6eb
DP		 953 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) {
954 FLUSH_SCHEDULED_WORK();
955 del_timer_sync(&adapter->watchdog_timer);
956 }
3d396eb1
AK		 957
958 return 0;
959}
960
961static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
962{
3176ff3e 963 struct netxen_adapter *adapter = netdev_priv(netdev);
3d396eb1
AK		 964 struct netxen_hardware_context *hw = &adapter->ahw;
965 unsigned int first_seg_len = skb->len - skb->data_len;
966 struct netxen_skb_frag *buffrag;
967 unsigned int i;
968
ba53e6b4 969 u32 producer, consumer;
3d396eb1
AK		 970 u32 saved_producer = 0;
971 struct cmd_desc_type0 *hwdesc;
972 int k;
973 struct netxen_cmd_buffer *pbuf = NULL;
3d396eb1 974 int frag_count;
3d396eb1 975 int no_of_desc;
ba53e6b4 976 u32 num_txd = adapter->max_tx_desc_count;
3d396eb1 977
3d396eb1
AK		 978 frag_count = skb_shinfo(skb)->nr_frags + 1;
979
3d396eb1
AK		 980 /* There 4 fragments per descriptor */
981 no_of_desc = (frag_count + 3) >> 2;
cb8011ad
AK		 982 if (netdev->features & NETIF_F_TSO) {
983 if (skb_shinfo(skb)->gso_size > 0) {
984
3d396eb1 985 no_of_desc++;
ab6a5bb6 986 if ((ip_hdrlen(skb) + tcp_hdrlen(skb) +
c9bdd4b5 987 sizeof(struct ethhdr)) >
ed25ffa1 988 (sizeof(struct cmd_desc_type0) - 2)) {
cb8011ad
AK		 989 no_of_desc++;
990 }
3d396eb1
AK		 991 }
992 }
53a01e00 993
ba53e6b4
DP		 994 producer = adapter->cmd_producer;
995 smp_mb();
996 consumer = adapter->last_cmd_consumer;
997 if ((no_of_desc+2) > find_diff_among(producer, consumer, num_txd)) {
998 netif_stop_queue(netdev);
999 smp_mb();
1000 return NETDEV_TX_BUSY;
53a01e00 1001 }
3d396eb1 1002
3d396eb1 1003 /* Copy the descriptors into the hardware */
3d396eb1
AK		 1004 saved_producer = producer;
1005 hwdesc = &hw->cmd_desc_head[producer];
1006 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
1007 /* Take skb->data itself */
1008 pbuf = &adapter->cmd_buf_arr[producer];
cb8011ad 1009 if ((netdev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size > 0) {
a608ab9c 1010 pbuf->mss = skb_shinfo(skb)->gso_size;
ed33ebe4 1011 hwdesc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
3d396eb1
AK		 1012 } else {
1013 pbuf->mss = 0;
1014 hwdesc->mss = 0;
1015 }
3d396eb1
AK		 1016 pbuf->total_length = skb->len;
1017 pbuf->skb = skb;
1018 pbuf->cmd = TX_ETHER_PKT;
1019 pbuf->frag_count = frag_count;
3176ff3e 1020 pbuf->port = adapter->portnum;
3d396eb1 1021 buffrag = &pbuf->frag_array[0];
3176ff3e 1022 buffrag->dma = pci_map_single(adapter->pdev, skb->data, first_seg_len,
3d396eb1
AK		 1023 PCI_DMA_TODEVICE);
1024 buffrag->length = first_seg_len;
ed25ffa1
AK		 1025 netxen_set_cmd_desc_totallength(hwdesc, skb->len);
1026 netxen_set_cmd_desc_num_of_buff(hwdesc, frag_count);
1027 netxen_set_cmd_desc_opcode(hwdesc, TX_ETHER_PKT);
3d396eb1 1028
3176ff3e 1029 netxen_set_cmd_desc_port(hwdesc, adapter->portnum);
6c80b18d 1030 netxen_set_cmd_desc_ctxid(hwdesc, adapter->portnum);
3d396eb1
AK		 1031 hwdesc->buffer1_length = cpu_to_le16(first_seg_len);
1032 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
1033
1034 for (i = 1, k = 1; i < frag_count; i++, k++) {
1035 struct skb_frag_struct *frag;
1036 int len, temp_len;
1037 unsigned long offset;
1038 dma_addr_t temp_dma;
1039
1040 /* move to next desc. if there is a need */
1041 if ((i & 0x3) == 0) {
1042 k = 0;
ba53e6b4 1043 producer = get_next_index(producer, num_txd);
3d396eb1
AK		 1044 hwdesc = &hw->cmd_desc_head[producer];
1045 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
53a01e00 1046 pbuf = &adapter->cmd_buf_arr[producer];
1047 pbuf->skb = NULL;
3d396eb1
AK		 1048 }
1049 frag = &skb_shinfo(skb)->frags[i - 1];
1050 len = frag->size;
1051 offset = frag->page_offset;
1052
1053 temp_len = len;
3176ff3e 1054 temp_dma = pci_map_page(adapter->pdev, frag->page, offset,
3d396eb1
AK		 1055 len, PCI_DMA_TODEVICE);
1056
1057 buffrag++;
1058 buffrag->dma = temp_dma;
1059 buffrag->length = temp_len;
1060
3d396eb1
AK		 1061 switch (k) {
1062 case 0:
1063 hwdesc->buffer1_length = cpu_to_le16(temp_len);
1064 hwdesc->addr_buffer1 = cpu_to_le64(temp_dma);
1065 break;
1066 case 1:
1067 hwdesc->buffer2_length = cpu_to_le16(temp_len);
1068 hwdesc->addr_buffer2 = cpu_to_le64(temp_dma);
1069 break;
1070 case 2:
1071 hwdesc->buffer3_length = cpu_to_le16(temp_len);
1072 hwdesc->addr_buffer3 = cpu_to_le64(temp_dma);
1073 break;
1074 case 3:
a608ab9c 1075 hwdesc->buffer4_length = cpu_to_le16(temp_len);
3d396eb1
AK		 1076 hwdesc->addr_buffer4 = cpu_to_le64(temp_dma);
1077 break;
1078 }
1079 frag++;
1080 }
ba53e6b4 1081 producer = get_next_index(producer, num_txd);
3d396eb1
AK		 1082
1083 /* might change opcode to TX_TCP_LSO */
1084 netxen_tso_check(adapter, &hw->cmd_desc_head[saved_producer], skb);
1085
1086 /* For LSO, we need to copy the MAC/IP/TCP headers into
1087 * the descriptor ring
1088 */
ed25ffa1
AK		 1089 if (netxen_get_cmd_desc_opcode(&hw->cmd_desc_head[saved_producer])
1090 == TX_TCP_LSO) {
3d396eb1
AK		 1091 int hdr_len, first_hdr_len, more_hdr;
1092 hdr_len = hw->cmd_desc_head[saved_producer].total_hdr_length;
ed25ffa1
AK		 1093 if (hdr_len > (sizeof(struct cmd_desc_type0) - 2)) {
1094 first_hdr_len = sizeof(struct cmd_desc_type0) - 2;
3d396eb1
AK		 1095 more_hdr = 1;
1096 } else {
1097 first_hdr_len = hdr_len;
1098 more_hdr = 0;
1099 }
1100 /* copy the MAC/IP/TCP headers to the cmd descriptor list */
1101 hwdesc = &hw->cmd_desc_head[producer];
53a01e00 1102 pbuf = &adapter->cmd_buf_arr[producer];
1103 pbuf->skb = NULL;
3d396eb1
AK		 1104
1105 /* copy the first 64 bytes */
ed25ffa1 1106 memcpy(((void *)hwdesc) + 2,
3d396eb1 1107 (void *)(skb->data), first_hdr_len);
ba53e6b4 1108 producer = get_next_index(producer, num_txd);
3d396eb1
AK		 1109
1110 if (more_hdr) {
1111 hwdesc = &hw->cmd_desc_head[producer];
53a01e00 1112 pbuf = &adapter->cmd_buf_arr[producer];
1113 pbuf->skb = NULL;
3d396eb1
AK		 1114 /* copy the next 64 bytes - should be enough except
1115 * for pathological case
1116 */
d626f62b
ACM		 1117 skb_copy_from_linear_data_offset(skb, first_hdr_len,
1118 hwdesc,
1119 (hdr_len -
1120 first_hdr_len));
ba53e6b4 1121 producer = get_next_index(producer, num_txd);
3d396eb1
AK		 1122 }
1123 }
6c80b18d 1124
ba53e6b4 1125 adapter->cmd_producer = producer;
5dc16268 1126 adapter->stats.txbytes += skb->len;
6c80b18d 1127
ba53e6b4 1128 netxen_nic_update_cmd_producer(adapter, adapter->cmd_producer);
3d396eb1 1129
ba53e6b4 1130 adapter->stats.xmitcalled++;
3d396eb1
AK		 1131 netdev->trans_start = jiffies;
1132
3d396eb1
AK		 1133 return NETDEV_TX_OK;
1134}
1135
1136static void netxen_watchdog(unsigned long v)
1137{
1138 struct netxen_adapter *adapter = (struct netxen_adapter *)v;
ed25ffa1
AK		 1139
1140 SCHEDULE_WORK(&adapter->watchdog_task);
3d396eb1
AK		 1141}
1142
1143static void netxen_tx_timeout(struct net_device *netdev)
1144{
3176ff3e
MT		 1145 struct netxen_adapter *adapter = (struct netxen_adapter *)
1146 netdev_priv(netdev);
1147 SCHEDULE_WORK(&adapter->tx_timeout_task);
3d396eb1
AK		 1148}
1149
6d5aefb8 1150static void netxen_tx_timeout_task(struct work_struct *work)
3d396eb1 1151{
4790654c 1152 struct netxen_adapter *adapter =
3176ff3e 1153 container_of(work, struct netxen_adapter, tx_timeout_task);
3d396eb1
AK		 1154
1155 printk(KERN_ERR "%s %s: transmit timeout, resetting.\n",
6c80b18d 1156 netxen_nic_driver_name, adapter->netdev->name);
3d396eb1 1157
ba53e6b4
DP		 1158 netxen_nic_disable_int(adapter);
1159 napi_disable(&adapter->napi);
1160
6c80b18d 1161 adapter->netdev->trans_start = jiffies;
ba53e6b4
DP		 1162
1163 napi_enable(&adapter->napi);
1164 netxen_nic_enable_int(adapter);
6c80b18d 1165 netif_wake_queue(adapter->netdev);
3d396eb1
AK		 1166}
1167
05aaa02d
DP		 1168static inline void
1169netxen_handle_int(struct netxen_adapter *adapter)
3d396eb1 1170{
2d1a3bbd 1171 netxen_nic_disable_int(adapter);
05aaa02d 1172 napi_schedule(&adapter->napi);
3d396eb1
AK		 1173}
1174
1494a814 1175irqreturn_t netxen_intr(int irq, void *data)
3d396eb1 1176{
1daec86a 1177 struct netxen_adapter *adapter = data;
e01872af 1178 u32 our_int = 0;
3d396eb1 1179
05aaa02d
DP		 1180 our_int = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
1181 /* not our interrupt */
1182 if ((our_int & (0x80 << adapter->portnum)) == 0)
1183 return IRQ_NONE;
e01872af 1184
1185 if (adapter->intr_scheme == INTR_SCHEME_PERPORT) {
1186 /* claim interrupt */
05aaa02d 1187 writel(our_int & ~((u32)(0x80 << adapter->portnum)),
e01872af 1188 NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
e01872af 1189 }
1190
05aaa02d 1191 netxen_handle_int(adapter);
3d396eb1
AK		 1192
1193 return IRQ_HANDLED;
1194}
1195
05aaa02d
DP		 1196irqreturn_t netxen_msi_intr(int irq, void *data)
1197{
1198 struct netxen_adapter *adapter = data;
1199
1200 netxen_handle_int(adapter);
1201 return IRQ_HANDLED;
1202}
1203
bea3348e 1204static int netxen_nic_poll(struct napi_struct *napi, int budget)
3d396eb1 1205{
bea3348e 1206 struct netxen_adapter *adapter = container_of(napi, struct netxen_adapter, napi);
05aaa02d 1207 int tx_complete;
3d396eb1 1208 int ctx;
bea3348e 1209 int work_done;
3d396eb1 1210
05aaa02d 1211 tx_complete = netxen_process_cmd_ring(adapter);
3d396eb1 1212
80922fbc 1213 work_done = 0;
3d396eb1
AK		 1214 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
1215 /*
1216 * Fairness issue. This will give undue weight to the
1217 * receive context 0.
1218 */
1219
1220 /*
1221 * To avoid starvation, we give each of our receivers,
1222 * a fraction of the quota. Sometimes, it might happen that we
1223 * have enough quota to process every packet, but since all the
1224 * packets are on one context, it gets only half of the quota,
1225 * and ends up not processing it.
1226 */
bea3348e
SH		 1227 work_done += netxen_process_rcv_ring(adapter, ctx,
1228 budget / MAX_RCV_CTX);
3d396eb1
AK		 1229 }
1230
05aaa02d
DP		 1231 if ((work_done < budget) && tx_complete) {
1232 netif_rx_complete(adapter->netdev, &adapter->napi);
3d396eb1
AK		 1233 netxen_nic_enable_int(adapter);
1234 }
1235
bea3348e 1236 return work_done;
3d396eb1
AK		 1237}
1238
1239#ifdef CONFIG_NET_POLL_CONTROLLER
1240static void netxen_nic_poll_controller(struct net_device *netdev)
1241{
3176ff3e 1242 struct netxen_adapter *adapter = netdev_priv(netdev);
3d396eb1 1243 disable_irq(adapter->irq);
1494a814 1244 netxen_intr(adapter->irq, adapter);
3d396eb1
AK		 1245 enable_irq(adapter->irq);
1246}
1247#endif
3d396eb1
AK		 1248
1249static struct pci_driver netxen_driver = {
1250 .name = netxen_nic_driver_name,
1251 .id_table = netxen_pci_tbl,
1252 .probe = netxen_nic_probe,
1253 .remove = __devexit_p(netxen_nic_remove)
1254};
1255
1256/* Driver Registration on NetXen card */
1257
1258static int __init netxen_init_module(void)
1259{
79ea13ce 1260 if ((netxen_workq = create_singlethread_workqueue("netxen")) == NULL)
ed25ffa1
AK		 1261 return -ENOMEM;
1262
184231bd 1263 return pci_register_driver(&netxen_driver);
3d396eb1
AK		 1264}
1265
1266module_init(netxen_init_module);
1267
1268static void __exit netxen_exit_module(void)
1269{
1270 /*
1271 * Wait for some time to allow the dma to drain, if any.
1272 */
96acb6eb 1273 msleep(100);
3d396eb1 1274 pci_unregister_driver(&netxen_driver);
9de06610 1275 destroy_workqueue(netxen_workq);
3d396eb1
AK		 1276}
1277
1278module_exit(netxen_exit_module);
Linux 6.x block layer and io_uring tree(s)