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;
381 netdev->open = netxen_nic_open;
382 netdev->stop = netxen_nic_close;
383 netdev->hard_start_xmit = netxen_nic_xmit_frame;
384 netdev->get_stats = netxen_nic_get_stats;
385 netdev->set_multicast_list = netxen_nic_set_multi;
386 netdev->set_mac_address = netxen_nic_set_mac;
387 netdev->change_mtu = netxen_nic_change_mtu;
388 netdev->tx_timeout = netxen_tx_timeout;
389 netdev->watchdog_timeo = 2*HZ;
391 netxen_nic_change_mtu(netdev, netdev->mtu);
393 SET_ETHTOOL_OPS(netdev, &netxen_nic_ethtool_ops);
394 #ifdef CONFIG_NET_POLL_CONTROLLER
395 netdev->poll_controller = netxen_nic_poll_controller;
397 /* ScatterGather support */
398 netdev->features = NETIF_F_SG;
399 netdev->features |= NETIF_F_IP_CSUM;
400 netdev->features |= NETIF_F_TSO;
403 netdev->features |= NETIF_F_HIGHDMA;
405 if (pci_enable_msi(pdev))
406 adapter->flags &= ~NETXEN_NIC_MSI_ENABLED;
408 adapter->flags |= NETXEN_NIC_MSI_ENABLED;
410 netdev->irq = pdev->irq;
411 INIT_WORK(&adapter->tx_timeout_task, netxen_tx_timeout_task);
414 * Set the CRB window to invalid. If any register in window 0 is
415 * accessed it should set the window to 0 and then reset it to 1.
417 adapter->curr_window = 255;
419 if (netxen_nic_get_board_info(adapter) != 0) {
420 printk("%s: Error getting board config info.\n",
421 netxen_nic_driver_name);
423 goto err_out_iounmap;
427 * Adapter in our case is quad port so initialize it before
428 * initializing the ports
431 netxen_initialize_adapter_ops(adapter);
433 adapter->max_tx_desc_count = MAX_CMD_DESCRIPTORS_HOST;
434 if ((adapter->ahw.boardcfg.board_type == NETXEN_BRDTYPE_P2_SB35_4G) ||
435 (adapter->ahw.boardcfg.board_type ==
436 NETXEN_BRDTYPE_P2_SB31_2G))
437 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_1G;
439 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS;
440 adapter->max_jumbo_rx_desc_count = MAX_JUMBO_RCV_DESCRIPTORS;
441 adapter->max_lro_rx_desc_count = MAX_LRO_RCV_DESCRIPTORS;
443 cmd_buf_arr = (struct netxen_cmd_buffer *)vmalloc(TX_RINGSIZE);
444 if (cmd_buf_arr == NULL) {
446 "%s: Could not allocate cmd_buf_arr memory:%d\n",
447 netxen_nic_driver_name, (int)TX_RINGSIZE);
449 goto err_out_free_adapter;
451 memset(cmd_buf_arr, 0, TX_RINGSIZE);
452 adapter->cmd_buf_arr = cmd_buf_arr;
454 for (i = 0; i < MAX_RCV_CTX; ++i) {
455 recv_ctx = &adapter->recv_ctx[i];
456 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
457 rcv_desc = &recv_ctx->rcv_desc[ring];
458 switch (RCV_DESC_TYPE(ring)) {
459 case RCV_DESC_NORMAL:
460 rcv_desc->max_rx_desc_count =
461 adapter->max_rx_desc_count;
462 rcv_desc->flags = RCV_DESC_NORMAL;
463 rcv_desc->dma_size = RX_DMA_MAP_LEN;
464 rcv_desc->skb_size = MAX_RX_BUFFER_LENGTH;
468 rcv_desc->max_rx_desc_count =
469 adapter->max_jumbo_rx_desc_count;
470 rcv_desc->flags = RCV_DESC_JUMBO;
471 rcv_desc->dma_size = RX_JUMBO_DMA_MAP_LEN;
472 rcv_desc->skb_size = MAX_RX_JUMBO_BUFFER_LENGTH;
476 rcv_desc->max_rx_desc_count =
477 adapter->max_lro_rx_desc_count;
478 rcv_desc->flags = RCV_DESC_LRO;
479 rcv_desc->dma_size = RX_LRO_DMA_MAP_LEN;
480 rcv_desc->skb_size = MAX_RX_LRO_BUFFER_LENGTH;
484 rcv_desc->rx_buf_arr = (struct netxen_rx_buffer *)
485 vmalloc(RCV_BUFFSIZE);
487 if (rcv_desc->rx_buf_arr == NULL) {
488 printk(KERN_ERR "%s: Could not allocate "
489 "rcv_desc->rx_buf_arr memory:%d\n",
490 netxen_nic_driver_name,
493 goto err_out_free_rx_buffer;
495 memset(rcv_desc->rx_buf_arr, 0, RCV_BUFFSIZE);
500 netxen_initialize_adapter_sw(adapter); /* initialize the buffers in adapter */
502 /* Mezz cards have PCI function 0,2,3 enabled */
503 switch (adapter->ahw.boardcfg.board_type) {
504 case NETXEN_BRDTYPE_P2_SB31_10G_IMEZ:
505 case NETXEN_BRDTYPE_P2_SB31_10G_HMEZ:
506 if (pci_func_id >= 2)
507 adapter->portnum = pci_func_id - 2;
513 init_timer(&adapter->watchdog_timer);
514 adapter->ahw.xg_linkup = 0;
515 adapter->watchdog_timer.function = &netxen_watchdog;
516 adapter->watchdog_timer.data = (unsigned long)adapter;
517 INIT_WORK(&adapter->watchdog_task, netxen_watchdog_task);
518 adapter->ahw.revision_id = pdev->revision;
520 /* make sure Window == 1 */
521 netxen_nic_pci_change_crbwindow(adapter, 1);
523 adapter->crb_addr_cmd_producer = crb_cmd_producer[adapter->portnum];
524 adapter->crb_addr_cmd_consumer = crb_cmd_consumer[adapter->portnum];
525 netxen_nic_update_cmd_producer(adapter, 0);
526 netxen_nic_update_cmd_consumer(adapter, 0);
527 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_HOST_CMD_ADDR_LO));
529 if (netxen_is_flash_supported(adapter) == 0 &&
530 netxen_get_flash_mac_addr(adapter, mac_addr) == 0)
536 unsigned char *p = (unsigned char *)&mac_addr[adapter->portnum];
537 netdev->dev_addr[0] = *(p + 5);
538 netdev->dev_addr[1] = *(p + 4);
539 netdev->dev_addr[2] = *(p + 3);
540 netdev->dev_addr[3] = *(p + 2);
541 netdev->dev_addr[4] = *(p + 1);
542 netdev->dev_addr[5] = *(p + 0);
544 memcpy(netdev->perm_addr, netdev->dev_addr,
546 if (!is_valid_ether_addr(netdev->perm_addr)) {
547 printk(KERN_ERR "%s: Bad MAC address %s.\n",
548 netxen_nic_driver_name,
549 print_mac(mac, netdev->dev_addr));
551 if (adapter->macaddr_set)
552 adapter->macaddr_set(adapter,
557 if (adapter->portnum == 0) {
558 err = netxen_initialize_adapter_offload(adapter);
560 goto err_out_free_rx_buffer;
561 val = readl(NETXEN_CRB_NORMALIZE(adapter,
562 NETXEN_CAM_RAM(0x1fc)));
563 if (val == 0x55555555) {
564 /* This is the first boot after power up */
565 netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(0x4), &val);
568 netxen_nic_write_w0(adapter, NETXEN_PCIE_REG(0x4), val);
569 netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(0x4), &val);
571 printk(KERN_ERR "%s: failed to set MSI bit in PCI-e reg\n",
572 netxen_nic_driver_name);
574 val = readl(NETXEN_CRB_NORMALIZE(adapter,
575 NETXEN_ROMUSB_GLB_SW_RESET));
576 printk(KERN_INFO"NetXen: read 0x%08x for reset reg.\n",val);
577 if (val != 0x80000f) {
578 /* clear the register for future unloads/loads */
579 writel(0, NETXEN_CRB_NORMALIZE(adapter,
580 NETXEN_CAM_RAM(0x1fc)));
581 printk(KERN_ERR "ERROR in NetXen HW init sequence.\n");
583 goto err_out_free_dev;
586 writel(0, NETXEN_CRB_NORMALIZE(adapter,
588 netxen_pinit_from_rom(adapter, 0);
590 netxen_load_firmware(adapter);
591 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
594 /* clear the register for future unloads/loads */
595 writel(0, NETXEN_CRB_NORMALIZE(adapter, NETXEN_CAM_RAM(0x1fc)));
596 dev_info(&pdev->dev, "cmdpeg state: 0x%0x\n",
597 readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)));
600 * Tell the hardware our version number.
602 i = (_NETXEN_NIC_LINUX_MAJOR << 16)
603 | ((_NETXEN_NIC_LINUX_MINOR << 8))
604 | (_NETXEN_NIC_LINUX_SUBVERSION);
605 writel(i, NETXEN_CRB_NORMALIZE(adapter, CRB_DRIVER_VERSION));
607 /* Unlock the HW, prompting the boot sequence */
609 NETXEN_CRB_NORMALIZE(adapter,
610 NETXEN_ROMUSB_GLB_PEGTUNE_DONE));
611 /* Handshake with the card before we register the devices. */
612 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
616 * See if the firmware gave us a virtual-physical port mapping.
618 adapter->physical_port = adapter->portnum;
619 i = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_V2P(adapter->portnum)));
621 adapter->physical_port = i;
623 netif_carrier_off(netdev);
624 netif_stop_queue(netdev);
626 if ((err = register_netdev(netdev))) {
627 printk(KERN_ERR "%s: register_netdev failed port #%d"
628 " aborting\n", netxen_nic_driver_name,
631 goto err_out_free_dev;
634 netxen_nic_flash_print(adapter);
635 pci_set_drvdata(pdev, adapter);
640 if (adapter->portnum == 0)
641 netxen_free_adapter_offload(adapter);
643 err_out_free_rx_buffer:
644 for (i = 0; i < MAX_RCV_CTX; ++i) {
645 recv_ctx = &adapter->recv_ctx[i];
646 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
647 rcv_desc = &recv_ctx->rcv_desc[ring];
648 if (rcv_desc->rx_buf_arr != NULL) {
649 vfree(rcv_desc->rx_buf_arr);
650 rcv_desc->rx_buf_arr = NULL;
656 err_out_free_adapter:
657 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
658 pci_disable_msi(pdev);
660 pci_set_drvdata(pdev, NULL);
677 pci_release_regions(pdev);
679 err_out_disable_pdev:
680 pci_disable_device(pdev);
684 static void __devexit netxen_nic_remove(struct pci_dev *pdev)
686 struct netxen_adapter *adapter;
687 struct net_device *netdev;
688 struct netxen_rx_buffer *buffer;
689 struct netxen_recv_context *recv_ctx;
690 struct netxen_rcv_desc_ctx *rcv_desc;
692 static int init_firmware_done = 0;
694 adapter = pci_get_drvdata(pdev);
698 netdev = adapter->netdev;
700 unregister_netdev(netdev);
702 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) {
703 init_firmware_done++;
704 netxen_free_hw_resources(adapter);
707 for (ctxid = 0; ctxid < MAX_RCV_CTX; ++ctxid) {
708 recv_ctx = &adapter->recv_ctx[ctxid];
709 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
710 rcv_desc = &recv_ctx->rcv_desc[ring];
711 for (i = 0; i < rcv_desc->max_rx_desc_count; ++i) {
712 buffer = &(rcv_desc->rx_buf_arr[i]);
713 if (buffer->state == NETXEN_BUFFER_FREE)
715 pci_unmap_single(pdev, buffer->dma,
718 if (buffer->skb != NULL)
719 dev_kfree_skb_any(buffer->skb);
721 vfree(rcv_desc->rx_buf_arr);
725 vfree(adapter->cmd_buf_arr);
727 if (adapter->portnum == 0)
728 netxen_free_adapter_offload(adapter);
731 free_irq(adapter->irq, adapter);
733 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
734 pci_disable_msi(pdev);
736 iounmap(adapter->ahw.db_base);
737 iounmap(adapter->ahw.pci_base0);
738 iounmap(adapter->ahw.pci_base1);
739 iounmap(adapter->ahw.pci_base2);
741 pci_release_regions(pdev);
742 pci_disable_device(pdev);
743 pci_set_drvdata(pdev, NULL);
749 * Called when a network interface is made active
750 * @returns 0 on success, negative value on failure
752 static int netxen_nic_open(struct net_device *netdev)
754 struct netxen_adapter *adapter = (struct netxen_adapter *)netdev->priv;
757 irq_handler_t handler;
758 unsigned long flags = IRQF_SAMPLE_RANDOM;
760 if (adapter->driver_mismatch)
763 if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC) {
764 err = netxen_init_firmware(adapter);
766 printk(KERN_ERR "Failed to init firmware\n");
770 /* setup all the resources for the Phantom... */
771 /* this include the descriptors for rcv, tx, and status */
772 netxen_nic_clear_stats(adapter);
773 err = netxen_nic_hw_resources(adapter);
775 printk(KERN_ERR "Error in setting hw resources:%d\n",
779 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
780 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++)
781 netxen_post_rx_buffers(adapter, ctx, ring);
783 adapter->irq = adapter->pdev->irq;
784 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
785 handler = netxen_msi_intr;
787 flags |= IRQF_SHARED;
788 handler = netxen_intr;
790 err = request_irq(adapter->irq, handler,
791 flags, netdev->name, adapter);
793 printk(KERN_ERR "request_irq failed with: %d\n", err);
794 netxen_free_hw_resources(adapter);
798 adapter->is_up = NETXEN_ADAPTER_UP_MAGIC;
800 /* Done here again so that even if phantom sw overwrote it,
802 if (adapter->init_port
803 && adapter->init_port(adapter, adapter->portnum) != 0) {
804 printk(KERN_ERR "%s: Failed to initialize port %d\n",
805 netxen_nic_driver_name, adapter->portnum);
808 if (adapter->macaddr_set)
809 adapter->macaddr_set(adapter, netdev->dev_addr);
811 netxen_nic_set_link_parameters(adapter);
813 netxen_nic_set_multi(netdev);
814 if (adapter->set_mtu)
815 adapter->set_mtu(adapter, netdev->mtu);
817 mod_timer(&adapter->watchdog_timer, jiffies);
819 napi_enable(&adapter->napi);
820 netxen_nic_enable_int(adapter);
822 netif_start_queue(netdev);
828 * netxen_nic_close - Disables a network interface entry point
830 static int netxen_nic_close(struct net_device *netdev)
832 struct netxen_adapter *adapter = netdev_priv(netdev);
834 struct netxen_cmd_buffer *cmd_buff;
835 struct netxen_skb_frag *buffrag;
837 netif_carrier_off(netdev);
838 netif_stop_queue(netdev);
839 napi_disable(&adapter->napi);
841 if (adapter->stop_port)
842 adapter->stop_port(adapter);
844 netxen_nic_disable_int(adapter);
846 cmd_buff = adapter->cmd_buf_arr;
847 for (i = 0; i < adapter->max_tx_desc_count; i++) {
848 buffrag = cmd_buff->frag_array;
850 pci_unmap_single(adapter->pdev, buffrag->dma,
851 buffrag->length, PCI_DMA_TODEVICE);
854 for (j = 0; j < cmd_buff->frag_count; j++) {
857 pci_unmap_page(adapter->pdev, buffrag->dma,
863 /* Free the skb we received in netxen_nic_xmit_frame */
865 dev_kfree_skb_any(cmd_buff->skb);
866 cmd_buff->skb = NULL;
870 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) {
871 FLUSH_SCHEDULED_WORK();
872 del_timer_sync(&adapter->watchdog_timer);
878 static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
880 struct netxen_adapter *adapter = netdev_priv(netdev);
881 struct netxen_hardware_context *hw = &adapter->ahw;
882 unsigned int first_seg_len = skb->len - skb->data_len;
883 struct netxen_skb_frag *buffrag;
886 u32 producer, consumer;
887 u32 saved_producer = 0;
888 struct cmd_desc_type0 *hwdesc;
890 struct netxen_cmd_buffer *pbuf = NULL;
893 u32 num_txd = adapter->max_tx_desc_count;
895 frag_count = skb_shinfo(skb)->nr_frags + 1;
897 /* There 4 fragments per descriptor */
898 no_of_desc = (frag_count + 3) >> 2;
899 if (netdev->features & NETIF_F_TSO) {
900 if (skb_shinfo(skb)->gso_size > 0) {
903 if ((ip_hdrlen(skb) + tcp_hdrlen(skb) +
904 sizeof(struct ethhdr)) >
905 (sizeof(struct cmd_desc_type0) - 2)) {
911 producer = adapter->cmd_producer;
913 consumer = adapter->last_cmd_consumer;
914 if ((no_of_desc+2) > find_diff_among(producer, consumer, num_txd)) {
915 netif_stop_queue(netdev);
917 return NETDEV_TX_BUSY;
920 /* Copy the descriptors into the hardware */
921 saved_producer = producer;
922 hwdesc = &hw->cmd_desc_head[producer];
923 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
924 /* Take skb->data itself */
925 pbuf = &adapter->cmd_buf_arr[producer];
926 if ((netdev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size > 0) {
927 pbuf->mss = skb_shinfo(skb)->gso_size;
928 hwdesc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
933 pbuf->total_length = skb->len;
935 pbuf->cmd = TX_ETHER_PKT;
936 pbuf->frag_count = frag_count;
937 pbuf->port = adapter->portnum;
938 buffrag = &pbuf->frag_array[0];
939 buffrag->dma = pci_map_single(adapter->pdev, skb->data, first_seg_len,
941 buffrag->length = first_seg_len;
942 netxen_set_cmd_desc_totallength(hwdesc, skb->len);
943 netxen_set_cmd_desc_num_of_buff(hwdesc, frag_count);
944 netxen_set_cmd_desc_opcode(hwdesc, TX_ETHER_PKT);
946 netxen_set_cmd_desc_port(hwdesc, adapter->portnum);
947 netxen_set_cmd_desc_ctxid(hwdesc, adapter->portnum);
948 hwdesc->buffer1_length = cpu_to_le16(first_seg_len);
949 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
951 for (i = 1, k = 1; i < frag_count; i++, k++) {
952 struct skb_frag_struct *frag;
954 unsigned long offset;
957 /* move to next desc. if there is a need */
958 if ((i & 0x3) == 0) {
960 producer = get_next_index(producer, num_txd);
961 hwdesc = &hw->cmd_desc_head[producer];
962 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
963 pbuf = &adapter->cmd_buf_arr[producer];
966 frag = &skb_shinfo(skb)->frags[i - 1];
968 offset = frag->page_offset;
971 temp_dma = pci_map_page(adapter->pdev, frag->page, offset,
972 len, PCI_DMA_TODEVICE);
975 buffrag->dma = temp_dma;
976 buffrag->length = temp_len;
980 hwdesc->buffer1_length = cpu_to_le16(temp_len);
981 hwdesc->addr_buffer1 = cpu_to_le64(temp_dma);
984 hwdesc->buffer2_length = cpu_to_le16(temp_len);
985 hwdesc->addr_buffer2 = cpu_to_le64(temp_dma);
988 hwdesc->buffer3_length = cpu_to_le16(temp_len);
989 hwdesc->addr_buffer3 = cpu_to_le64(temp_dma);
992 hwdesc->buffer4_length = cpu_to_le16(temp_len);
993 hwdesc->addr_buffer4 = cpu_to_le64(temp_dma);
998 producer = get_next_index(producer, num_txd);
1000 /* might change opcode to TX_TCP_LSO */
1001 netxen_tso_check(adapter, &hw->cmd_desc_head[saved_producer], skb);
1003 /* For LSO, we need to copy the MAC/IP/TCP headers into
1004 * the descriptor ring
1006 if (netxen_get_cmd_desc_opcode(&hw->cmd_desc_head[saved_producer])
1008 int hdr_len, first_hdr_len, more_hdr;
1009 hdr_len = hw->cmd_desc_head[saved_producer].total_hdr_length;
1010 if (hdr_len > (sizeof(struct cmd_desc_type0) - 2)) {
1011 first_hdr_len = sizeof(struct cmd_desc_type0) - 2;
1014 first_hdr_len = hdr_len;
1017 /* copy the MAC/IP/TCP headers to the cmd descriptor list */
1018 hwdesc = &hw->cmd_desc_head[producer];
1019 pbuf = &adapter->cmd_buf_arr[producer];
1022 /* copy the first 64 bytes */
1023 memcpy(((void *)hwdesc) + 2,
1024 (void *)(skb->data), first_hdr_len);
1025 producer = get_next_index(producer, num_txd);
1028 hwdesc = &hw->cmd_desc_head[producer];
1029 pbuf = &adapter->cmd_buf_arr[producer];
1031 /* copy the next 64 bytes - should be enough except
1032 * for pathological case
1034 skb_copy_from_linear_data_offset(skb, first_hdr_len,
1038 producer = get_next_index(producer, num_txd);
1042 adapter->cmd_producer = producer;
1043 adapter->stats.txbytes += skb->len;
1045 netxen_nic_update_cmd_producer(adapter, adapter->cmd_producer);
1047 adapter->stats.xmitcalled++;
1048 netdev->trans_start = jiffies;
1050 return NETDEV_TX_OK;
1053 static void netxen_watchdog(unsigned long v)
1055 struct netxen_adapter *adapter = (struct netxen_adapter *)v;
1057 SCHEDULE_WORK(&adapter->watchdog_task);
1060 static void netxen_tx_timeout(struct net_device *netdev)
1062 struct netxen_adapter *adapter = (struct netxen_adapter *)
1063 netdev_priv(netdev);
1064 SCHEDULE_WORK(&adapter->tx_timeout_task);
1067 static void netxen_tx_timeout_task(struct work_struct *work)
1069 struct netxen_adapter *adapter =
1070 container_of(work, struct netxen_adapter, tx_timeout_task);
1072 printk(KERN_ERR "%s %s: transmit timeout, resetting.\n",
1073 netxen_nic_driver_name, adapter->netdev->name);
1075 netxen_nic_disable_int(adapter);
1076 napi_disable(&adapter->napi);
1078 adapter->netdev->trans_start = jiffies;
1080 napi_enable(&adapter->napi);
1081 netxen_nic_enable_int(adapter);
1082 netif_wake_queue(adapter->netdev);
1086 netxen_handle_int(struct netxen_adapter *adapter)
1088 netxen_nic_disable_int(adapter);
1089 napi_schedule(&adapter->napi);
1092 irqreturn_t netxen_intr(int irq, void *data)
1094 struct netxen_adapter *adapter = data;
1097 our_int = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
1098 /* not our interrupt */
1099 if ((our_int & (0x80 << adapter->portnum)) == 0)
1102 if (adapter->intr_scheme == INTR_SCHEME_PERPORT) {
1103 /* claim interrupt */
1104 writel(our_int & ~((u32)(0x80 << adapter->portnum)),
1105 NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
1108 netxen_handle_int(adapter);
1113 irqreturn_t netxen_msi_intr(int irq, void *data)
1115 struct netxen_adapter *adapter = data;
1117 netxen_handle_int(adapter);
1121 static int netxen_nic_poll(struct napi_struct *napi, int budget)
1123 struct netxen_adapter *adapter = container_of(napi, struct netxen_adapter, napi);
1128 tx_complete = netxen_process_cmd_ring(adapter);
1131 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
1133 * Fairness issue. This will give undue weight to the
1134 * receive context 0.
1138 * To avoid starvation, we give each of our receivers,
1139 * a fraction of the quota. Sometimes, it might happen that we
1140 * have enough quota to process every packet, but since all the
1141 * packets are on one context, it gets only half of the quota,
1142 * and ends up not processing it.
1144 work_done += netxen_process_rcv_ring(adapter, ctx,
1145 budget / MAX_RCV_CTX);
1148 if ((work_done < budget) && tx_complete) {
1149 netif_rx_complete(adapter->netdev, &adapter->napi);
1150 netxen_nic_enable_int(adapter);
1156 #ifdef CONFIG_NET_POLL_CONTROLLER
1157 static void netxen_nic_poll_controller(struct net_device *netdev)
1159 struct netxen_adapter *adapter = netdev_priv(netdev);
1160 disable_irq(adapter->irq);
1161 netxen_intr(adapter->irq, adapter);
1162 enable_irq(adapter->irq);
1166 static struct pci_driver netxen_driver = {
1167 .name = netxen_nic_driver_name,
1168 .id_table = netxen_pci_tbl,
1169 .probe = netxen_nic_probe,
1170 .remove = __devexit_p(netxen_nic_remove)
1173 /* Driver Registration on NetXen card */
1175 static int __init netxen_init_module(void)
1177 if ((netxen_workq = create_singlethread_workqueue("netxen")) == NULL)
1180 return pci_register_driver(&netxen_driver);
1183 module_init(netxen_init_module);
1185 static void __exit netxen_exit_module(void)
1187 pci_unregister_driver(&netxen_driver);
1188 destroy_workqueue(netxen_workq);
1191 module_exit(netxen_exit_module);