2 * Copyright (C) 2003 - 2006 NetXen, Inc.
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.
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.
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,
20 * The full GNU General Public License is included in this distribution
21 * in the file called LICENSE.
23 * Contact Information:
26 * 3965 Freedom Circle, Fourth floor,
27 * Santa Clara, CA 95054
30 * Main source file for NetXen NIC Driver on Linux
34 #include <linux/vmalloc.h>
35 #include <linux/highmem.h>
36 #include "netxen_nic_hw.h"
38 #include "netxen_nic.h"
39 #include "netxen_nic_phan_reg.h"
41 #include <linux/dma-mapping.h>
44 MODULE_DESCRIPTION("NetXen Multi port (1/10) Gigabit Network Driver");
45 MODULE_LICENSE("GPL");
46 MODULE_VERSION(NETXEN_NIC_LINUX_VERSIONID);
48 char netxen_nic_driver_name[] = "netxen_nic";
49 static char netxen_nic_driver_string[] = "NetXen Network Driver version "
50 NETXEN_NIC_LINUX_VERSIONID;
52 #define NETXEN_NETDEV_WEIGHT 120
53 #define NETXEN_ADAPTER_UP_MAGIC 777
54 #define NETXEN_NIC_PEG_TUNE 0
56 /* Local functions to NetXen NIC driver */
57 static int __devinit netxen_nic_probe(struct pci_dev *pdev,
58 const struct pci_device_id *ent);
59 static void __devexit netxen_nic_remove(struct pci_dev *pdev);
60 static int netxen_nic_open(struct net_device *netdev);
61 static int netxen_nic_close(struct net_device *netdev);
62 static int netxen_nic_xmit_frame(struct sk_buff *, struct net_device *);
63 static void netxen_tx_timeout(struct net_device *netdev);
64 static void netxen_tx_timeout_task(struct work_struct *work);
65 static void netxen_watchdog(unsigned long);
66 static int netxen_nic_poll(struct napi_struct *napi, int budget);
67 #ifdef CONFIG_NET_POLL_CONTROLLER
68 static void netxen_nic_poll_controller(struct net_device *netdev);
70 static irqreturn_t netxen_intr(int irq, void *data);
71 static irqreturn_t netxen_msi_intr(int irq, void *data);
73 /* PCI Device ID Table */
74 #define ENTRY(device) \
75 {PCI_DEVICE(0x4040, (device)), \
76 .class = PCI_CLASS_NETWORK_ETHERNET << 8, .class_mask = ~0}
78 static struct pci_device_id netxen_pci_tbl[] __devinitdata = {
89 MODULE_DEVICE_TABLE(pci, netxen_pci_tbl);
92 * In netxen_nic_down(), we must wait for any pending callback requests into
93 * netxen_watchdog_task() to complete; eg otherwise the watchdog_timer could be
94 * reenabled right after it is deleted in netxen_nic_down().
95 * FLUSH_SCHEDULED_WORK() does this synchronization.
97 * Normally, schedule_work()/flush_scheduled_work() could have worked, but
98 * netxen_nic_close() is invoked with kernel rtnl lock held. netif_carrier_off()
99 * call in netxen_nic_close() triggers a schedule_work(&linkwatch_work), and a
100 * subsequent call to flush_scheduled_work() in netxen_nic_down() would cause
101 * linkwatch_event() to be executed which also attempts to acquire the rtnl
102 * lock thus causing a deadlock.
105 static struct workqueue_struct *netxen_workq;
106 #define SCHEDULE_WORK(tp) queue_work(netxen_workq, tp)
107 #define FLUSH_SCHEDULED_WORK() flush_workqueue(netxen_workq)
109 static void netxen_watchdog(unsigned long);
111 static uint32_t crb_cmd_producer[4] = {
112 CRB_CMD_PRODUCER_OFFSET, CRB_CMD_PRODUCER_OFFSET_1,
113 CRB_CMD_PRODUCER_OFFSET_2, CRB_CMD_PRODUCER_OFFSET_3
116 static void netxen_nic_update_cmd_producer(struct netxen_adapter *adapter,
117 uint32_t crb_producer)
119 writel(crb_producer, NETXEN_CRB_NORMALIZE(adapter,
120 adapter->crb_addr_cmd_producer));
123 static uint32_t crb_cmd_consumer[4] = {
124 CRB_CMD_CONSUMER_OFFSET, CRB_CMD_CONSUMER_OFFSET_1,
125 CRB_CMD_CONSUMER_OFFSET_2, CRB_CMD_CONSUMER_OFFSET_3
128 static void netxen_nic_update_cmd_consumer(struct netxen_adapter *adapter,
131 writel(crb_consumer, NETXEN_CRB_NORMALIZE(adapter,
132 adapter->crb_addr_cmd_consumer));
135 static uint32_t msi_tgt_status[4] = {
136 ISR_INT_TARGET_STATUS, ISR_INT_TARGET_STATUS_F1,
137 ISR_INT_TARGET_STATUS_F2, ISR_INT_TARGET_STATUS_F3
140 static uint32_t sw_int_mask[4] = {
141 CRB_SW_INT_MASK_0, CRB_SW_INT_MASK_1,
142 CRB_SW_INT_MASK_2, CRB_SW_INT_MASK_3
145 static void netxen_nic_disable_int(struct netxen_adapter *adapter)
149 int port = adapter->portnum;
150 int pci_fn = adapter->ahw.pci_func;
152 if (adapter->msi_mode != MSI_MODE_MULTIFUNC)
153 writel(0x0, NETXEN_CRB_NORMALIZE(adapter, sw_int_mask[port]));
155 if (adapter->intr_scheme != -1 &&
156 adapter->intr_scheme != INTR_SCHEME_PERPORT)
157 writel(mask,PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_MASK));
159 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
162 PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_TARGET_STATUS));
163 mask = readl(pci_base_offset(adapter, ISR_INT_VECTOR));
170 printk(KERN_NOTICE "%s: Failed to disable interrupt completely\n",
171 netxen_nic_driver_name);
174 if (adapter->msi_mode == MSI_MODE_MULTIFUNC) {
175 writel(0xffffffff, PCI_OFFSET_SECOND_RANGE(adapter,
176 msi_tgt_status[pci_fn]));
181 static void netxen_nic_enable_int(struct netxen_adapter *adapter)
184 int port = adapter->portnum;
186 DPRINTK(1, INFO, "Entered ISR Enable \n");
188 if (adapter->intr_scheme != -1 &&
189 adapter->intr_scheme != INTR_SCHEME_PERPORT) {
190 switch (adapter->ahw.board_type) {
194 case NETXEN_NIC_XGBE:
202 writel(mask, PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_MASK));
205 writel(0x1, NETXEN_CRB_NORMALIZE(adapter, sw_int_mask[port]));
207 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
209 if (adapter->intr_scheme != -1 &&
210 adapter->intr_scheme != INTR_SCHEME_PERPORT) {
211 writel(0X0, NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
214 PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_TARGET_MASK));
217 DPRINTK(1, INFO, "Done with enable Int\n");
223 * The Linux system will invoke this after identifying the vendor ID and
224 * device Id in the pci_tbl supported by this module.
226 * A quad port card has one operational PCI config space, (function 0),
227 * which is used to access all four ports.
229 * This routine will initialize the adapter, and setup the global parameters
230 * along with the port's specific structure.
233 netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
235 struct net_device *netdev = NULL;
236 struct netxen_adapter *adapter = NULL;
237 void __iomem *mem_ptr0 = NULL;
238 void __iomem *mem_ptr1 = NULL;
239 void __iomem *mem_ptr2 = NULL;
240 unsigned long first_page_group_end;
241 unsigned long first_page_group_start;
244 u8 __iomem *db_ptr = NULL;
245 unsigned long mem_base, mem_len, db_base, db_len;
246 int pci_using_dac, i = 0, err;
248 struct netxen_recv_context *recv_ctx = NULL;
249 struct netxen_rcv_desc_ctx *rcv_desc = NULL;
250 struct netxen_cmd_buffer *cmd_buf_arr = NULL;
251 __le64 mac_addr[FLASH_NUM_PORTS + 1];
254 int pci_func_id = PCI_FUNC(pdev->devfn);
255 DECLARE_MAC_BUF(mac);
257 if (pci_func_id == 0)
258 printk(KERN_INFO "%s \n", netxen_nic_driver_string);
260 if (pdev->class != 0x020000) {
261 printk(KERN_DEBUG "NetXen function %d, class %x will not "
262 "be enabled.\n",pci_func_id, pdev->class);
265 if ((err = pci_enable_device(pdev)))
267 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
269 goto err_out_disable_pdev;
272 if ((err = pci_request_regions(pdev, netxen_nic_driver_name)))
273 goto err_out_disable_pdev;
275 pci_set_master(pdev);
276 if (pdev->revision == NX_P2_C1 &&
277 (pci_set_dma_mask(pdev, DMA_35BIT_MASK) == 0) &&
278 (pci_set_consistent_dma_mask(pdev, DMA_35BIT_MASK) == 0)) {
281 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) ||
282 (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK)))
283 goto err_out_free_res;
289 netdev = alloc_etherdev(sizeof(struct netxen_adapter));
291 printk(KERN_ERR"%s: Failed to allocate memory for the "
292 "device block.Check system memory resource"
293 " usage.\n", netxen_nic_driver_name);
294 goto err_out_free_res;
297 SET_NETDEV_DEV(netdev, &pdev->dev);
299 adapter = netdev->priv;
301 adapter->ahw.pci_func = pci_func_id;
303 /* remap phys address */
304 mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */
305 mem_len = pci_resource_len(pdev, 0);
307 /* 128 Meg of memory */
308 if (mem_len == NETXEN_PCI_128MB_SIZE) {
309 mem_ptr0 = ioremap(mem_base, FIRST_PAGE_GROUP_SIZE);
310 mem_ptr1 = ioremap(mem_base + SECOND_PAGE_GROUP_START,
311 SECOND_PAGE_GROUP_SIZE);
312 mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START,
313 THIRD_PAGE_GROUP_SIZE);
314 first_page_group_start = FIRST_PAGE_GROUP_START;
315 first_page_group_end = FIRST_PAGE_GROUP_END;
316 } else if (mem_len == NETXEN_PCI_32MB_SIZE) {
317 mem_ptr1 = ioremap(mem_base, SECOND_PAGE_GROUP_SIZE);
318 mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START -
319 SECOND_PAGE_GROUP_START, THIRD_PAGE_GROUP_SIZE);
320 first_page_group_start = 0;
321 first_page_group_end = 0;
324 goto err_out_free_netdev;
327 if ((!mem_ptr0 && mem_len == NETXEN_PCI_128MB_SIZE) ||
328 !mem_ptr1 || !mem_ptr2) {
330 "Cannot remap adapter memory aborting.:"
331 "0 -> %p, 1 -> %p, 2 -> %p\n",
332 mem_ptr0, mem_ptr1, mem_ptr2);
335 goto err_out_iounmap;
337 db_base = pci_resource_start(pdev, 4); /* doorbell is on bar 4 */
338 db_len = pci_resource_len(pdev, 4);
341 printk(KERN_ERR "%s: doorbell is disabled\n",
342 netxen_nic_driver_name);
344 goto err_out_iounmap;
346 DPRINTK(INFO, "doorbell ioremap from %lx a size of %lx\n", db_base,
349 db_ptr = ioremap(db_base, NETXEN_DB_MAPSIZE_BYTES);
351 printk(KERN_ERR "%s: Failed to allocate doorbell map.",
352 netxen_nic_driver_name);
354 goto err_out_iounmap;
356 DPRINTK(INFO, "doorbell ioremaped at %p\n", db_ptr);
358 adapter->ahw.pci_base0 = mem_ptr0;
359 adapter->ahw.first_page_group_start = first_page_group_start;
360 adapter->ahw.first_page_group_end = first_page_group_end;
361 adapter->ahw.pci_base1 = mem_ptr1;
362 adapter->ahw.pci_base2 = mem_ptr2;
363 adapter->ahw.db_base = db_ptr;
364 adapter->ahw.db_len = db_len;
366 adapter->netdev = netdev;
367 adapter->pdev = pdev;
369 netif_napi_add(netdev, &adapter->napi,
370 netxen_nic_poll, NETXEN_NETDEV_WEIGHT);
372 /* this will be read from FW later */
373 adapter->intr_scheme = -1;
374 adapter->msi_mode = -1;
376 /* This will be reset for mezz cards */
377 adapter->portnum = pci_func_id;
378 adapter->status &= ~NETXEN_NETDEV_STATUS;
379 adapter->rx_csum = 1;
380 adapter->max_mc_count = 16;
381 adapter->mc_enabled = 0;
383 netdev->open = netxen_nic_open;
384 netdev->stop = netxen_nic_close;
385 netdev->hard_start_xmit = netxen_nic_xmit_frame;
386 netdev->get_stats = netxen_nic_get_stats;
387 netdev->set_multicast_list = netxen_nic_set_multi;
388 netdev->set_mac_address = netxen_nic_set_mac;
389 netdev->change_mtu = netxen_nic_change_mtu;
390 netdev->tx_timeout = netxen_tx_timeout;
391 netdev->watchdog_timeo = 2*HZ;
393 netxen_nic_change_mtu(netdev, netdev->mtu);
395 SET_ETHTOOL_OPS(netdev, &netxen_nic_ethtool_ops);
396 #ifdef CONFIG_NET_POLL_CONTROLLER
397 netdev->poll_controller = netxen_nic_poll_controller;
399 /* ScatterGather support */
400 netdev->features = NETIF_F_SG;
401 netdev->features |= NETIF_F_IP_CSUM;
402 netdev->features |= NETIF_F_TSO;
405 netdev->features |= NETIF_F_HIGHDMA;
407 if (pci_enable_msi(pdev))
408 adapter->flags &= ~NETXEN_NIC_MSI_ENABLED;
410 adapter->flags |= NETXEN_NIC_MSI_ENABLED;
412 netdev->irq = pdev->irq;
413 INIT_WORK(&adapter->tx_timeout_task, netxen_tx_timeout_task);
416 * Set the CRB window to invalid. If any register in window 0 is
417 * accessed it should set the window to 0 and then reset it to 1.
419 adapter->curr_window = 255;
421 if (netxen_nic_get_board_info(adapter) != 0) {
422 printk("%s: Error getting board config info.\n",
423 netxen_nic_driver_name);
425 goto err_out_iounmap;
429 * Adapter in our case is quad port so initialize it before
430 * initializing the ports
433 netxen_initialize_adapter_ops(adapter);
435 adapter->max_tx_desc_count = MAX_CMD_DESCRIPTORS_HOST;
436 if ((adapter->ahw.boardcfg.board_type == NETXEN_BRDTYPE_P2_SB35_4G) ||
437 (adapter->ahw.boardcfg.board_type ==
438 NETXEN_BRDTYPE_P2_SB31_2G))
439 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_1G;
441 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS;
442 adapter->max_jumbo_rx_desc_count = MAX_JUMBO_RCV_DESCRIPTORS;
443 adapter->max_lro_rx_desc_count = MAX_LRO_RCV_DESCRIPTORS;
445 cmd_buf_arr = (struct netxen_cmd_buffer *)vmalloc(TX_RINGSIZE);
446 if (cmd_buf_arr == NULL) {
448 "%s: Could not allocate cmd_buf_arr memory:%d\n",
449 netxen_nic_driver_name, (int)TX_RINGSIZE);
451 goto err_out_free_adapter;
453 memset(cmd_buf_arr, 0, TX_RINGSIZE);
454 adapter->cmd_buf_arr = cmd_buf_arr;
456 for (i = 0; i < MAX_RCV_CTX; ++i) {
457 recv_ctx = &adapter->recv_ctx[i];
458 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
459 rcv_desc = &recv_ctx->rcv_desc[ring];
460 switch (RCV_DESC_TYPE(ring)) {
461 case RCV_DESC_NORMAL:
462 rcv_desc->max_rx_desc_count =
463 adapter->max_rx_desc_count;
464 rcv_desc->flags = RCV_DESC_NORMAL;
465 rcv_desc->dma_size = RX_DMA_MAP_LEN;
466 rcv_desc->skb_size = MAX_RX_BUFFER_LENGTH;
470 rcv_desc->max_rx_desc_count =
471 adapter->max_jumbo_rx_desc_count;
472 rcv_desc->flags = RCV_DESC_JUMBO;
473 rcv_desc->dma_size = RX_JUMBO_DMA_MAP_LEN;
474 rcv_desc->skb_size = MAX_RX_JUMBO_BUFFER_LENGTH;
478 rcv_desc->max_rx_desc_count =
479 adapter->max_lro_rx_desc_count;
480 rcv_desc->flags = RCV_DESC_LRO;
481 rcv_desc->dma_size = RX_LRO_DMA_MAP_LEN;
482 rcv_desc->skb_size = MAX_RX_LRO_BUFFER_LENGTH;
486 rcv_desc->rx_buf_arr = (struct netxen_rx_buffer *)
487 vmalloc(RCV_BUFFSIZE);
489 if (rcv_desc->rx_buf_arr == NULL) {
490 printk(KERN_ERR "%s: Could not allocate "
491 "rcv_desc->rx_buf_arr memory:%d\n",
492 netxen_nic_driver_name,
495 goto err_out_free_rx_buffer;
497 memset(rcv_desc->rx_buf_arr, 0, RCV_BUFFSIZE);
502 netxen_initialize_adapter_sw(adapter); /* initialize the buffers in adapter */
504 /* Mezz cards have PCI function 0,2,3 enabled */
505 switch (adapter->ahw.boardcfg.board_type) {
506 case NETXEN_BRDTYPE_P2_SB31_10G_IMEZ:
507 case NETXEN_BRDTYPE_P2_SB31_10G_HMEZ:
508 if (pci_func_id >= 2)
509 adapter->portnum = pci_func_id - 2;
515 init_timer(&adapter->watchdog_timer);
516 adapter->ahw.xg_linkup = 0;
517 adapter->watchdog_timer.function = &netxen_watchdog;
518 adapter->watchdog_timer.data = (unsigned long)adapter;
519 INIT_WORK(&adapter->watchdog_task, netxen_watchdog_task);
520 adapter->ahw.revision_id = pdev->revision;
522 /* make sure Window == 1 */
523 netxen_nic_pci_change_crbwindow(adapter, 1);
525 adapter->crb_addr_cmd_producer = crb_cmd_producer[adapter->portnum];
526 adapter->crb_addr_cmd_consumer = crb_cmd_consumer[adapter->portnum];
527 netxen_nic_update_cmd_producer(adapter, 0);
528 netxen_nic_update_cmd_consumer(adapter, 0);
529 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_HOST_CMD_ADDR_LO));
531 if (netxen_is_flash_supported(adapter) == 0 &&
532 netxen_get_flash_mac_addr(adapter, mac_addr) == 0)
538 unsigned char *p = (unsigned char *)&mac_addr[adapter->portnum];
539 netdev->dev_addr[0] = *(p + 5);
540 netdev->dev_addr[1] = *(p + 4);
541 netdev->dev_addr[2] = *(p + 3);
542 netdev->dev_addr[3] = *(p + 2);
543 netdev->dev_addr[4] = *(p + 1);
544 netdev->dev_addr[5] = *(p + 0);
546 memcpy(netdev->perm_addr, netdev->dev_addr,
548 if (!is_valid_ether_addr(netdev->perm_addr)) {
549 printk(KERN_ERR "%s: Bad MAC address %s.\n",
550 netxen_nic_driver_name,
551 print_mac(mac, netdev->dev_addr));
553 if (adapter->macaddr_set)
554 adapter->macaddr_set(adapter,
559 if (adapter->portnum == 0) {
560 err = netxen_initialize_adapter_offload(adapter);
562 goto err_out_free_rx_buffer;
563 val = readl(NETXEN_CRB_NORMALIZE(adapter,
564 NETXEN_CAM_RAM(0x1fc)));
565 if (val == 0x55555555) {
566 /* This is the first boot after power up */
567 netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(0x4), &val);
570 netxen_nic_write_w0(adapter, NETXEN_PCIE_REG(0x4), val);
571 netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(0x4), &val);
573 printk(KERN_ERR "%s: failed to set MSI bit in PCI-e reg\n",
574 netxen_nic_driver_name);
576 val = readl(NETXEN_CRB_NORMALIZE(adapter,
577 NETXEN_ROMUSB_GLB_SW_RESET));
578 printk(KERN_INFO"NetXen: read 0x%08x for reset reg.\n",val);
579 if (val != 0x80000f) {
580 /* clear the register for future unloads/loads */
581 writel(0, NETXEN_CRB_NORMALIZE(adapter,
582 NETXEN_CAM_RAM(0x1fc)));
583 printk(KERN_ERR "ERROR in NetXen HW init sequence.\n");
585 goto err_out_free_dev;
588 writel(0, NETXEN_CRB_NORMALIZE(adapter,
590 netxen_pinit_from_rom(adapter, 0);
592 netxen_load_firmware(adapter);
593 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
595 /* Initialize multicast addr pool owners */
597 if (adapter->ahw.board_type == NETXEN_NIC_XGBE)
599 netxen_crb_writelit_adapter(adapter,
600 NETXEN_MAC_ADDR_CNTL_REG, val);
604 /* clear the register for future unloads/loads */
605 writel(0, NETXEN_CRB_NORMALIZE(adapter, NETXEN_CAM_RAM(0x1fc)));
606 dev_info(&pdev->dev, "cmdpeg state: 0x%0x\n",
607 readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)));
610 * Tell the hardware our version number.
612 i = (_NETXEN_NIC_LINUX_MAJOR << 16)
613 | ((_NETXEN_NIC_LINUX_MINOR << 8))
614 | (_NETXEN_NIC_LINUX_SUBVERSION);
615 writel(i, NETXEN_CRB_NORMALIZE(adapter, CRB_DRIVER_VERSION));
617 /* Unlock the HW, prompting the boot sequence */
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);
626 * See if the firmware gave us a virtual-physical port mapping.
628 adapter->physical_port = adapter->portnum;
629 i = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_V2P(adapter->portnum)));
631 adapter->physical_port = i;
633 netif_carrier_off(netdev);
634 netif_stop_queue(netdev);
636 if ((err = register_netdev(netdev))) {
637 printk(KERN_ERR "%s: register_netdev failed port #%d"
638 " aborting\n", netxen_nic_driver_name,
641 goto err_out_free_dev;
644 netxen_nic_flash_print(adapter);
645 pci_set_drvdata(pdev, adapter);
650 if (adapter->portnum == 0)
651 netxen_free_adapter_offload(adapter);
653 err_out_free_rx_buffer:
654 for (i = 0; i < MAX_RCV_CTX; ++i) {
655 recv_ctx = &adapter->recv_ctx[i];
656 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
657 rcv_desc = &recv_ctx->rcv_desc[ring];
658 if (rcv_desc->rx_buf_arr != NULL) {
659 vfree(rcv_desc->rx_buf_arr);
660 rcv_desc->rx_buf_arr = NULL;
666 err_out_free_adapter:
667 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
668 pci_disable_msi(pdev);
670 pci_set_drvdata(pdev, NULL);
687 pci_release_regions(pdev);
689 err_out_disable_pdev:
690 pci_disable_device(pdev);
694 static void __devexit netxen_nic_remove(struct pci_dev *pdev)
696 struct netxen_adapter *adapter;
697 struct net_device *netdev;
698 struct netxen_rx_buffer *buffer;
699 struct netxen_recv_context *recv_ctx;
700 struct netxen_rcv_desc_ctx *rcv_desc;
702 static int init_firmware_done = 0;
704 adapter = pci_get_drvdata(pdev);
708 netdev = adapter->netdev;
710 unregister_netdev(netdev);
712 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) {
713 init_firmware_done++;
714 netxen_free_hw_resources(adapter);
717 for (ctxid = 0; ctxid < MAX_RCV_CTX; ++ctxid) {
718 recv_ctx = &adapter->recv_ctx[ctxid];
719 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
720 rcv_desc = &recv_ctx->rcv_desc[ring];
721 for (i = 0; i < rcv_desc->max_rx_desc_count; ++i) {
722 buffer = &(rcv_desc->rx_buf_arr[i]);
723 if (buffer->state == NETXEN_BUFFER_FREE)
725 pci_unmap_single(pdev, buffer->dma,
728 if (buffer->skb != NULL)
729 dev_kfree_skb_any(buffer->skb);
731 vfree(rcv_desc->rx_buf_arr);
735 vfree(adapter->cmd_buf_arr);
737 if (adapter->portnum == 0)
738 netxen_free_adapter_offload(adapter);
741 free_irq(adapter->irq, adapter);
743 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
744 pci_disable_msi(pdev);
746 iounmap(adapter->ahw.db_base);
747 iounmap(adapter->ahw.pci_base0);
748 iounmap(adapter->ahw.pci_base1);
749 iounmap(adapter->ahw.pci_base2);
751 pci_release_regions(pdev);
752 pci_disable_device(pdev);
753 pci_set_drvdata(pdev, NULL);
759 * Called when a network interface is made active
760 * @returns 0 on success, negative value on failure
762 static int netxen_nic_open(struct net_device *netdev)
764 struct netxen_adapter *adapter = (struct netxen_adapter *)netdev->priv;
767 irq_handler_t handler;
768 unsigned long flags = IRQF_SAMPLE_RANDOM;
770 if (adapter->driver_mismatch)
773 if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC) {
774 err = netxen_init_firmware(adapter);
776 printk(KERN_ERR "Failed to init firmware\n");
780 /* setup all the resources for the Phantom... */
781 /* this include the descriptors for rcv, tx, and status */
782 netxen_nic_clear_stats(adapter);
783 err = netxen_nic_hw_resources(adapter);
785 printk(KERN_ERR "Error in setting hw resources:%d\n",
789 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
790 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++)
791 netxen_post_rx_buffers(adapter, ctx, ring);
793 adapter->irq = adapter->pdev->irq;
794 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
795 handler = netxen_msi_intr;
797 flags |= IRQF_SHARED;
798 handler = netxen_intr;
800 err = request_irq(adapter->irq, handler,
801 flags, netdev->name, adapter);
803 printk(KERN_ERR "request_irq failed with: %d\n", err);
804 netxen_free_hw_resources(adapter);
808 adapter->is_up = NETXEN_ADAPTER_UP_MAGIC;
810 /* Done here again so that even if phantom sw overwrote it,
812 if (adapter->init_port
813 && adapter->init_port(adapter, adapter->portnum) != 0) {
814 printk(KERN_ERR "%s: Failed to initialize port %d\n",
815 netxen_nic_driver_name, adapter->portnum);
818 if (adapter->macaddr_set)
819 adapter->macaddr_set(adapter, netdev->dev_addr);
821 netxen_nic_set_link_parameters(adapter);
823 netxen_nic_set_multi(netdev);
824 if (adapter->set_mtu)
825 adapter->set_mtu(adapter, netdev->mtu);
827 mod_timer(&adapter->watchdog_timer, jiffies);
829 napi_enable(&adapter->napi);
830 netxen_nic_enable_int(adapter);
832 netif_start_queue(netdev);
838 * netxen_nic_close - Disables a network interface entry point
840 static int netxen_nic_close(struct net_device *netdev)
842 struct netxen_adapter *adapter = netdev_priv(netdev);
844 struct netxen_cmd_buffer *cmd_buff;
845 struct netxen_skb_frag *buffrag;
847 netif_carrier_off(netdev);
848 netif_stop_queue(netdev);
849 napi_disable(&adapter->napi);
851 if (adapter->stop_port)
852 adapter->stop_port(adapter);
854 netxen_nic_disable_int(adapter);
856 cmd_buff = adapter->cmd_buf_arr;
857 for (i = 0; i < adapter->max_tx_desc_count; i++) {
858 buffrag = cmd_buff->frag_array;
860 pci_unmap_single(adapter->pdev, buffrag->dma,
861 buffrag->length, PCI_DMA_TODEVICE);
864 for (j = 0; j < cmd_buff->frag_count; j++) {
867 pci_unmap_page(adapter->pdev, buffrag->dma,
873 /* Free the skb we received in netxen_nic_xmit_frame */
875 dev_kfree_skb_any(cmd_buff->skb);
876 cmd_buff->skb = NULL;
880 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) {
881 FLUSH_SCHEDULED_WORK();
882 del_timer_sync(&adapter->watchdog_timer);
888 static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
890 struct netxen_adapter *adapter = netdev_priv(netdev);
891 struct netxen_hardware_context *hw = &adapter->ahw;
892 unsigned int first_seg_len = skb->len - skb->data_len;
893 struct netxen_skb_frag *buffrag;
896 u32 producer, consumer;
897 u32 saved_producer = 0;
898 struct cmd_desc_type0 *hwdesc;
900 struct netxen_cmd_buffer *pbuf = NULL;
903 u32 num_txd = adapter->max_tx_desc_count;
905 frag_count = skb_shinfo(skb)->nr_frags + 1;
907 /* There 4 fragments per descriptor */
908 no_of_desc = (frag_count + 3) >> 2;
909 if (netdev->features & NETIF_F_TSO) {
910 if (skb_shinfo(skb)->gso_size > 0) {
913 if ((ip_hdrlen(skb) + tcp_hdrlen(skb) +
914 sizeof(struct ethhdr)) >
915 (sizeof(struct cmd_desc_type0) - 2)) {
921 producer = adapter->cmd_producer;
923 consumer = adapter->last_cmd_consumer;
924 if ((no_of_desc+2) > find_diff_among(producer, consumer, num_txd)) {
925 netif_stop_queue(netdev);
927 return NETDEV_TX_BUSY;
930 /* Copy the descriptors into the hardware */
931 saved_producer = producer;
932 hwdesc = &hw->cmd_desc_head[producer];
933 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
934 /* Take skb->data itself */
935 pbuf = &adapter->cmd_buf_arr[producer];
936 if ((netdev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size > 0) {
937 pbuf->mss = skb_shinfo(skb)->gso_size;
938 hwdesc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
943 pbuf->total_length = skb->len;
945 pbuf->cmd = TX_ETHER_PKT;
946 pbuf->frag_count = frag_count;
947 pbuf->port = adapter->portnum;
948 buffrag = &pbuf->frag_array[0];
949 buffrag->dma = pci_map_single(adapter->pdev, skb->data, first_seg_len,
951 buffrag->length = first_seg_len;
952 netxen_set_cmd_desc_totallength(hwdesc, skb->len);
953 netxen_set_cmd_desc_num_of_buff(hwdesc, frag_count);
954 netxen_set_cmd_desc_opcode(hwdesc, TX_ETHER_PKT);
956 netxen_set_cmd_desc_port(hwdesc, adapter->portnum);
957 netxen_set_cmd_desc_ctxid(hwdesc, adapter->portnum);
958 hwdesc->buffer1_length = cpu_to_le16(first_seg_len);
959 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
961 for (i = 1, k = 1; i < frag_count; i++, k++) {
962 struct skb_frag_struct *frag;
964 unsigned long offset;
967 /* move to next desc. if there is a need */
968 if ((i & 0x3) == 0) {
970 producer = get_next_index(producer, num_txd);
971 hwdesc = &hw->cmd_desc_head[producer];
972 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
973 pbuf = &adapter->cmd_buf_arr[producer];
976 frag = &skb_shinfo(skb)->frags[i - 1];
978 offset = frag->page_offset;
981 temp_dma = pci_map_page(adapter->pdev, frag->page, offset,
982 len, PCI_DMA_TODEVICE);
985 buffrag->dma = temp_dma;
986 buffrag->length = temp_len;
990 hwdesc->buffer1_length = cpu_to_le16(temp_len);
991 hwdesc->addr_buffer1 = cpu_to_le64(temp_dma);
994 hwdesc->buffer2_length = cpu_to_le16(temp_len);
995 hwdesc->addr_buffer2 = cpu_to_le64(temp_dma);
998 hwdesc->buffer3_length = cpu_to_le16(temp_len);
999 hwdesc->addr_buffer3 = cpu_to_le64(temp_dma);
1002 hwdesc->buffer4_length = cpu_to_le16(temp_len);
1003 hwdesc->addr_buffer4 = cpu_to_le64(temp_dma);
1008 producer = get_next_index(producer, num_txd);
1010 /* might change opcode to TX_TCP_LSO */
1011 netxen_tso_check(adapter, &hw->cmd_desc_head[saved_producer], skb);
1013 /* For LSO, we need to copy the MAC/IP/TCP headers into
1014 * the descriptor ring
1016 if (netxen_get_cmd_desc_opcode(&hw->cmd_desc_head[saved_producer])
1018 int hdr_len, first_hdr_len, more_hdr;
1019 hdr_len = hw->cmd_desc_head[saved_producer].total_hdr_length;
1020 if (hdr_len > (sizeof(struct cmd_desc_type0) - 2)) {
1021 first_hdr_len = sizeof(struct cmd_desc_type0) - 2;
1024 first_hdr_len = hdr_len;
1027 /* copy the MAC/IP/TCP headers to the cmd descriptor list */
1028 hwdesc = &hw->cmd_desc_head[producer];
1029 pbuf = &adapter->cmd_buf_arr[producer];
1032 /* copy the first 64 bytes */
1033 memcpy(((void *)hwdesc) + 2,
1034 (void *)(skb->data), first_hdr_len);
1035 producer = get_next_index(producer, num_txd);
1038 hwdesc = &hw->cmd_desc_head[producer];
1039 pbuf = &adapter->cmd_buf_arr[producer];
1041 /* copy the next 64 bytes - should be enough except
1042 * for pathological case
1044 skb_copy_from_linear_data_offset(skb, first_hdr_len,
1048 producer = get_next_index(producer, num_txd);
1052 adapter->cmd_producer = producer;
1053 adapter->stats.txbytes += skb->len;
1055 netxen_nic_update_cmd_producer(adapter, adapter->cmd_producer);
1057 adapter->stats.xmitcalled++;
1058 netdev->trans_start = jiffies;
1060 return NETDEV_TX_OK;
1063 static void netxen_watchdog(unsigned long v)
1065 struct netxen_adapter *adapter = (struct netxen_adapter *)v;
1067 SCHEDULE_WORK(&adapter->watchdog_task);
1070 static void netxen_tx_timeout(struct net_device *netdev)
1072 struct netxen_adapter *adapter = (struct netxen_adapter *)
1073 netdev_priv(netdev);
1074 SCHEDULE_WORK(&adapter->tx_timeout_task);
1077 static void netxen_tx_timeout_task(struct work_struct *work)
1079 struct netxen_adapter *adapter =
1080 container_of(work, struct netxen_adapter, tx_timeout_task);
1082 printk(KERN_ERR "%s %s: transmit timeout, resetting.\n",
1083 netxen_nic_driver_name, adapter->netdev->name);
1085 netxen_nic_disable_int(adapter);
1086 napi_disable(&adapter->napi);
1088 adapter->netdev->trans_start = jiffies;
1090 napi_enable(&adapter->napi);
1091 netxen_nic_enable_int(adapter);
1092 netif_wake_queue(adapter->netdev);
1096 netxen_handle_int(struct netxen_adapter *adapter)
1098 netxen_nic_disable_int(adapter);
1099 napi_schedule(&adapter->napi);
1102 irqreturn_t netxen_intr(int irq, void *data)
1104 struct netxen_adapter *adapter = data;
1107 our_int = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
1108 /* not our interrupt */
1109 if ((our_int & (0x80 << adapter->portnum)) == 0)
1112 if (adapter->intr_scheme == INTR_SCHEME_PERPORT) {
1113 /* claim interrupt */
1114 writel(our_int & ~((u32)(0x80 << adapter->portnum)),
1115 NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
1118 netxen_handle_int(adapter);
1123 irqreturn_t netxen_msi_intr(int irq, void *data)
1125 struct netxen_adapter *adapter = data;
1127 netxen_handle_int(adapter);
1131 static int netxen_nic_poll(struct napi_struct *napi, int budget)
1133 struct netxen_adapter *adapter = container_of(napi, struct netxen_adapter, napi);
1138 tx_complete = netxen_process_cmd_ring(adapter);
1141 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
1143 * Fairness issue. This will give undue weight to the
1144 * receive context 0.
1148 * To avoid starvation, we give each of our receivers,
1149 * a fraction of the quota. Sometimes, it might happen that we
1150 * have enough quota to process every packet, but since all the
1151 * packets are on one context, it gets only half of the quota,
1152 * and ends up not processing it.
1154 work_done += netxen_process_rcv_ring(adapter, ctx,
1155 budget / MAX_RCV_CTX);
1158 if ((work_done < budget) && tx_complete) {
1159 netif_rx_complete(adapter->netdev, &adapter->napi);
1160 netxen_nic_enable_int(adapter);
1166 #ifdef CONFIG_NET_POLL_CONTROLLER
1167 static void netxen_nic_poll_controller(struct net_device *netdev)
1169 struct netxen_adapter *adapter = netdev_priv(netdev);
1170 disable_irq(adapter->irq);
1171 netxen_intr(adapter->irq, adapter);
1172 enable_irq(adapter->irq);
1176 static struct pci_driver netxen_driver = {
1177 .name = netxen_nic_driver_name,
1178 .id_table = netxen_pci_tbl,
1179 .probe = netxen_nic_probe,
1180 .remove = __devexit_p(netxen_nic_remove)
1183 /* Driver Registration on NetXen card */
1185 static int __init netxen_init_module(void)
1187 if ((netxen_workq = create_singlethread_workqueue("netxen")) == NULL)
1190 return pci_register_driver(&netxen_driver);
1193 module_init(netxen_init_module);
1195 static void __exit netxen_exit_module(void)
1197 pci_unregister_driver(&netxen_driver);
1198 destroy_workqueue(netxen_workq);
1201 module_exit(netxen_exit_module);