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>
42 #include <linux/vmalloc.h>
45 MODULE_DESCRIPTION("NetXen Multi port (1/10) Gigabit Network Driver");
46 MODULE_LICENSE("GPL");
47 MODULE_VERSION(NETXEN_NIC_LINUX_VERSIONID);
49 char netxen_nic_driver_name[] = "netxen-nic";
50 static char netxen_nic_driver_string[] = "NetXen Network Driver version "
51 NETXEN_NIC_LINUX_VERSIONID;
53 #define NETXEN_NETDEV_WEIGHT 120
54 #define NETXEN_ADAPTER_UP_MAGIC 777
55 #define NETXEN_NIC_PEG_TUNE 0
57 u8 nx_p2_id = NX_P2_C0;
59 #define DMA_32BIT_MASK 0x00000000ffffffffULL
60 #define DMA_35BIT_MASK 0x00000007ffffffffULL
62 /* Local functions to NetXen NIC driver */
63 static int __devinit netxen_nic_probe(struct pci_dev *pdev,
64 const struct pci_device_id *ent);
65 static void __devexit netxen_nic_remove(struct pci_dev *pdev);
66 static int netxen_nic_open(struct net_device *netdev);
67 static int netxen_nic_close(struct net_device *netdev);
68 static int netxen_nic_xmit_frame(struct sk_buff *, struct net_device *);
69 static void netxen_tx_timeout(struct net_device *netdev);
70 static void netxen_tx_timeout_task(struct work_struct *work);
71 static void netxen_watchdog(unsigned long);
72 static int netxen_handle_int(struct netxen_adapter *, struct net_device *);
73 static int netxen_nic_poll(struct net_device *dev, int *budget);
74 #ifdef CONFIG_NET_POLL_CONTROLLER
75 static void netxen_nic_poll_controller(struct net_device *netdev);
77 static irqreturn_t netxen_intr(int irq, void *data);
79 int physical_port[] = {0, 1, 2, 3};
81 /* PCI Device ID Table */
82 static struct pci_device_id netxen_pci_tbl[] __devinitdata = {
83 {PCI_DEVICE(0x4040, 0x0001)},
84 {PCI_DEVICE(0x4040, 0x0002)},
85 {PCI_DEVICE(0x4040, 0x0003)},
86 {PCI_DEVICE(0x4040, 0x0004)},
87 {PCI_DEVICE(0x4040, 0x0005)},
88 {PCI_DEVICE(0x4040, 0x0024)},
89 {PCI_DEVICE(0x4040, 0x0025)},
93 MODULE_DEVICE_TABLE(pci, netxen_pci_tbl);
95 struct workqueue_struct *netxen_workq;
96 static void netxen_watchdog(unsigned long);
98 static inline void netxen_nic_update_cmd_producer(struct netxen_adapter *adapter,
99 uint32_t crb_producer)
101 switch (adapter->portnum) {
103 writel(crb_producer, NETXEN_CRB_NORMALIZE
104 (adapter, CRB_CMD_PRODUCER_OFFSET));
107 writel(crb_producer, NETXEN_CRB_NORMALIZE
108 (adapter, CRB_CMD_PRODUCER_OFFSET_1));
111 writel(crb_producer, NETXEN_CRB_NORMALIZE
112 (adapter, CRB_CMD_PRODUCER_OFFSET_2));
115 writel(crb_producer, NETXEN_CRB_NORMALIZE
116 (adapter, CRB_CMD_PRODUCER_OFFSET_3));
119 printk(KERN_WARNING "We tried to update "
120 "CRB_CMD_PRODUCER_OFFSET for invalid "
121 "PCI function id %d\n",
127 static inline void netxen_nic_update_cmd_consumer(struct netxen_adapter *adapter,
130 switch (adapter->portnum) {
132 writel(crb_consumer, NETXEN_CRB_NORMALIZE
133 (adapter, CRB_CMD_CONSUMER_OFFSET));
136 writel(crb_consumer, NETXEN_CRB_NORMALIZE
137 (adapter, CRB_CMD_CONSUMER_OFFSET_1));
140 writel(crb_consumer, NETXEN_CRB_NORMALIZE
141 (adapter, CRB_CMD_CONSUMER_OFFSET_2));
144 writel(crb_consumer, NETXEN_CRB_NORMALIZE
145 (adapter, CRB_CMD_CONSUMER_OFFSET_3));
148 printk(KERN_WARNING "We tried to update "
149 "CRB_CMD_PRODUCER_OFFSET for invalid "
150 "PCI function id %d\n",
156 #define ADAPTER_LIST_SIZE 12
157 int netxen_cards_found;
162 * The Linux system will invoke this after identifying the vendor ID and
163 * device Id in the pci_tbl supported by this module.
165 * A quad port card has one operational PCI config space, (function 0),
166 * which is used to access all four ports.
168 * This routine will initialize the adapter, and setup the global parameters
169 * along with the port's specific structure.
172 netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
174 struct net_device *netdev = NULL;
175 struct netxen_adapter *adapter = NULL;
176 void __iomem *mem_ptr0 = NULL;
177 void __iomem *mem_ptr1 = NULL;
178 void __iomem *mem_ptr2 = NULL;
179 unsigned long first_page_group_end;
180 unsigned long first_page_group_start;
183 u8 __iomem *db_ptr = NULL;
184 unsigned long mem_base, mem_len, db_base, db_len;
185 int pci_using_dac, i = 0, err;
187 struct netxen_recv_context *recv_ctx = NULL;
188 struct netxen_rcv_desc_ctx *rcv_desc = NULL;
189 struct netxen_cmd_buffer *cmd_buf_arr = NULL;
190 u64 mac_addr[FLASH_NUM_PORTS + 1];
193 int pci_func_id = PCI_FUNC(pdev->devfn);
195 printk(KERN_INFO "%s \n", netxen_nic_driver_string);
197 if (pdev->class != 0x020000) {
198 printk(KERN_ERR"NetXen function %d, class %x will not"
199 "be enabled.\n",pci_func_id, pdev->class);
202 if ((err = pci_enable_device(pdev)))
204 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
206 goto err_out_disable_pdev;
209 if ((err = pci_request_regions(pdev, netxen_nic_driver_name)))
210 goto err_out_disable_pdev;
212 pci_set_master(pdev);
213 pci_read_config_byte(pdev, PCI_REVISION_ID, &nx_p2_id);
214 if (nx_p2_id == NX_P2_C1 &&
215 (pci_set_dma_mask(pdev, DMA_35BIT_MASK) == 0) &&
216 (pci_set_consistent_dma_mask(pdev, DMA_35BIT_MASK) == 0)) {
219 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) ||
220 (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK)))
221 goto err_out_free_res;
227 netdev = alloc_etherdev(sizeof(struct netxen_adapter));
229 printk(KERN_ERR"%s: Failed to allocate memory for the "
230 "device block.Check system memory resource"
231 " usage.\n", netxen_nic_driver_name);
232 goto err_out_free_res;
235 SET_MODULE_OWNER(netdev);
236 SET_NETDEV_DEV(netdev, &pdev->dev);
238 adapter = netdev->priv;
239 memset(adapter, 0 , sizeof(struct netxen_adapter));
241 adapter->ahw.pdev = pdev;
242 adapter->ahw.pci_func = pci_func_id;
243 spin_lock_init(&adapter->tx_lock);
244 spin_lock_init(&adapter->lock);
246 /* remap phys address */
247 mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */
248 mem_len = pci_resource_len(pdev, 0);
250 /* 128 Meg of memory */
251 if (mem_len == NETXEN_PCI_128MB_SIZE) {
252 mem_ptr0 = ioremap(mem_base, FIRST_PAGE_GROUP_SIZE);
253 mem_ptr1 = ioremap(mem_base + SECOND_PAGE_GROUP_START,
254 SECOND_PAGE_GROUP_SIZE);
255 mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START,
256 THIRD_PAGE_GROUP_SIZE);
257 first_page_group_start = FIRST_PAGE_GROUP_START;
258 first_page_group_end = FIRST_PAGE_GROUP_END;
259 } else if (mem_len == NETXEN_PCI_32MB_SIZE) {
260 mem_ptr1 = ioremap(mem_base, SECOND_PAGE_GROUP_SIZE);
261 mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START -
262 SECOND_PAGE_GROUP_START, THIRD_PAGE_GROUP_SIZE);
263 first_page_group_start = 0;
264 first_page_group_end = 0;
267 goto err_out_free_netdev;
270 if (((mem_ptr0 == 0UL) && (mem_len == NETXEN_PCI_128MB_SIZE)) ||
271 (mem_ptr1 == 0UL) || (mem_ptr2 == 0UL)) {
273 "Cannot remap adapter memory aborting.:"
274 "0 -> %p, 1 -> %p, 2 -> %p\n",
275 mem_ptr0, mem_ptr1, mem_ptr2);
278 goto err_out_iounmap;
280 db_base = pci_resource_start(pdev, 4); /* doorbell is on bar 4 */
281 db_len = pci_resource_len(pdev, 4);
284 printk(KERN_ERR "%s: doorbell is disabled\n",
285 netxen_nic_driver_name);
287 goto err_out_iounmap;
289 DPRINTK(INFO, "doorbell ioremap from %lx a size of %lx\n", db_base,
292 db_ptr = ioremap(db_base, NETXEN_DB_MAPSIZE_BYTES);
294 printk(KERN_ERR "%s: Failed to allocate doorbell map.",
295 netxen_nic_driver_name);
297 goto err_out_iounmap;
299 DPRINTK(INFO, "doorbell ioremaped at %p\n", db_ptr);
301 adapter->ahw.pci_base0 = mem_ptr0;
302 adapter->ahw.first_page_group_start = first_page_group_start;
303 adapter->ahw.first_page_group_end = first_page_group_end;
304 adapter->ahw.pci_base1 = mem_ptr1;
305 adapter->ahw.pci_base2 = mem_ptr2;
306 adapter->ahw.db_base = db_ptr;
307 adapter->ahw.db_len = db_len;
309 adapter->netdev = netdev;
310 adapter->pdev = pdev;
311 adapter->portnum = pci_func_id;
313 netdev->open = netxen_nic_open;
314 netdev->stop = netxen_nic_close;
315 netdev->hard_start_xmit = netxen_nic_xmit_frame;
316 netdev->get_stats = netxen_nic_get_stats;
317 netdev->set_multicast_list = netxen_nic_set_multi;
318 netdev->set_mac_address = netxen_nic_set_mac;
319 netdev->change_mtu = netxen_nic_change_mtu;
320 netdev->tx_timeout = netxen_tx_timeout;
321 netdev->watchdog_timeo = HZ;
323 netxen_nic_change_mtu(netdev, netdev->mtu);
325 SET_ETHTOOL_OPS(netdev, &netxen_nic_ethtool_ops);
326 netdev->poll = netxen_nic_poll;
327 netdev->weight = NETXEN_NETDEV_WEIGHT;
328 #ifdef CONFIG_NET_POLL_CONTROLLER
329 netdev->poll_controller = netxen_nic_poll_controller;
331 /* ScatterGather support */
332 netdev->features = NETIF_F_SG;
333 netdev->features |= NETIF_F_IP_CSUM;
334 netdev->features |= NETIF_F_TSO;
337 netdev->features |= NETIF_F_HIGHDMA;
339 if (pci_enable_msi(pdev)) {
340 adapter->flags &= ~NETXEN_NIC_MSI_ENABLED;
341 printk(KERN_WARNING "%s: unable to allocate MSI interrupt"
342 " error\n", netxen_nic_driver_name);
344 adapter->flags |= NETXEN_NIC_MSI_ENABLED;
346 netdev->irq = pdev->irq;
347 INIT_WORK(&adapter->tx_timeout_task, netxen_tx_timeout_task);
350 * Set the CRB window to invalid. If any register in window 0 is
351 * accessed it should set the window to 0 and then reset it to 1.
353 adapter->curr_window = 255;
355 /* initialize the adapter */
356 netxen_initialize_adapter_hw(adapter);
359 if ((adapter->ahw.boardcfg.board_type ==
360 NETXEN_BRDTYPE_P2_SB31_10G_IMEZ) &&
362 goto err_out_free_adapter;
363 #endif /* CONFIG_PPC */
366 * Adapter in our case is quad port so initialize it before
367 * initializing the ports
370 netxen_initialize_adapter_ops(adapter);
372 adapter->max_tx_desc_count = MAX_CMD_DESCRIPTORS_HOST;
373 if ((adapter->ahw.boardcfg.board_type == NETXEN_BRDTYPE_P2_SB35_4G) ||
374 (adapter->ahw.boardcfg.board_type ==
375 NETXEN_BRDTYPE_P2_SB31_2G))
376 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_1G;
378 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS;
379 adapter->max_jumbo_rx_desc_count = MAX_JUMBO_RCV_DESCRIPTORS;
380 adapter->max_lro_rx_desc_count = MAX_LRO_RCV_DESCRIPTORS;
382 cmd_buf_arr = (struct netxen_cmd_buffer *)vmalloc(TX_RINGSIZE);
383 if (cmd_buf_arr == NULL) {
385 "%s: Could not allocate cmd_buf_arr memory:%d\n",
386 netxen_nic_driver_name, (int)TX_RINGSIZE);
388 goto err_out_free_adapter;
390 memset(cmd_buf_arr, 0, TX_RINGSIZE);
391 adapter->cmd_buf_arr = cmd_buf_arr;
393 for (i = 0; i < MAX_RCV_CTX; ++i) {
394 recv_ctx = &adapter->recv_ctx[i];
395 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
396 rcv_desc = &recv_ctx->rcv_desc[ring];
397 switch (RCV_DESC_TYPE(ring)) {
398 case RCV_DESC_NORMAL:
399 rcv_desc->max_rx_desc_count =
400 adapter->max_rx_desc_count;
401 rcv_desc->flags = RCV_DESC_NORMAL;
402 rcv_desc->dma_size = RX_DMA_MAP_LEN;
403 rcv_desc->skb_size = MAX_RX_BUFFER_LENGTH;
407 rcv_desc->max_rx_desc_count =
408 adapter->max_jumbo_rx_desc_count;
409 rcv_desc->flags = RCV_DESC_JUMBO;
410 rcv_desc->dma_size = RX_JUMBO_DMA_MAP_LEN;
411 rcv_desc->skb_size = MAX_RX_JUMBO_BUFFER_LENGTH;
415 rcv_desc->max_rx_desc_count =
416 adapter->max_lro_rx_desc_count;
417 rcv_desc->flags = RCV_DESC_LRO;
418 rcv_desc->dma_size = RX_LRO_DMA_MAP_LEN;
419 rcv_desc->skb_size = MAX_RX_LRO_BUFFER_LENGTH;
423 rcv_desc->rx_buf_arr = (struct netxen_rx_buffer *)
424 vmalloc(RCV_BUFFSIZE);
426 if (rcv_desc->rx_buf_arr == NULL) {
427 printk(KERN_ERR "%s: Could not allocate"
428 "rcv_desc->rx_buf_arr memory:%d\n",
429 netxen_nic_driver_name,
432 goto err_out_free_rx_buffer;
434 memset(rcv_desc->rx_buf_arr, 0, RCV_BUFFSIZE);
439 netxen_initialize_adapter_sw(adapter); /* initialize the buffers in adapter */
441 /* Mezz cards have PCI function 0,2,3 enabled */
442 if ((adapter->ahw.boardcfg.board_type == NETXEN_BRDTYPE_P2_SB31_10G_IMEZ)
443 && (pci_func_id >= 2))
444 adapter->portnum = pci_func_id - 2;
447 if(adapter->portnum == 0) {
448 netxen_pinit_from_rom(adapter, 0);
450 netxen_load_firmware(adapter);
454 init_timer(&adapter->watchdog_timer);
455 adapter->ahw.xg_linkup = 0;
456 adapter->watchdog_timer.function = &netxen_watchdog;
457 adapter->watchdog_timer.data = (unsigned long)adapter;
458 INIT_WORK(&adapter->watchdog_task, netxen_watchdog_task);
459 adapter->ahw.pdev = pdev;
460 adapter->proc_cmd_buf_counter = 0;
461 adapter->ahw.revision_id = nx_p2_id;
463 /* make sure Window == 1 */
464 netxen_nic_pci_change_crbwindow(adapter, 1);
466 netxen_nic_update_cmd_producer(adapter, 0);
467 netxen_nic_update_cmd_consumer(adapter, 0);
468 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_HOST_CMD_ADDR_LO));
470 if (netxen_is_flash_supported(adapter) == 0 &&
471 netxen_get_flash_mac_addr(adapter, mac_addr) == 0)
477 unsigned char *p = (unsigned char *)&mac_addr[adapter->portnum];
478 netdev->dev_addr[0] = *(p + 5);
479 netdev->dev_addr[1] = *(p + 4);
480 netdev->dev_addr[2] = *(p + 3);
481 netdev->dev_addr[3] = *(p + 2);
482 netdev->dev_addr[4] = *(p + 1);
483 netdev->dev_addr[5] = *(p + 0);
485 memcpy(netdev->perm_addr, netdev->dev_addr,
487 if (!is_valid_ether_addr(netdev->perm_addr)) {
488 printk(KERN_ERR "%s: Bad MAC address "
489 "%02x:%02x:%02x:%02x:%02x:%02x.\n",
490 netxen_nic_driver_name,
496 netdev->dev_addr[5]);
498 if (adapter->macaddr_set)
499 adapter->macaddr_set(adapter,
504 if (adapter->portnum == 0) {
505 err = netxen_initialize_adapter_offload(adapter);
507 goto err_out_free_rx_buffer;
508 val = readl(NETXEN_CRB_NORMALIZE(adapter,
509 NETXEN_CAM_RAM(0x1fc)));
510 if (val == 0x55555555) {
511 /* This is the first boot after power up */
512 val = readl(NETXEN_CRB_NORMALIZE(adapter,
513 NETXEN_ROMUSB_GLB_SW_RESET));
514 printk(KERN_INFO"NetXen: read 0x%08x for reset reg.\n",val);
515 if (val != 0x80000f) {
516 /* clear the register for future unloads/loads */
517 writel(0, NETXEN_CRB_NORMALIZE(adapter,
518 NETXEN_CAM_RAM(0x1fc)));
519 printk(KERN_ERR "ERROR in NetXen HW init sequence.\n");
521 goto err_out_free_dev;
524 /* clear the register for future unloads/loads */
525 writel(0, NETXEN_CRB_NORMALIZE(adapter,
526 NETXEN_CAM_RAM(0x1fc)));
528 printk(KERN_INFO "State: 0x%0x\n",
529 readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)));
532 * Tell the hardware our version number.
534 i = (_NETXEN_NIC_LINUX_MAJOR << 16)
535 | ((_NETXEN_NIC_LINUX_MINOR << 8))
536 | (_NETXEN_NIC_LINUX_SUBVERSION);
537 writel(i, NETXEN_CRB_NORMALIZE(adapter, CRB_DRIVER_VERSION));
539 /* Unlock the HW, prompting the boot sequence */
541 NETXEN_CRB_NORMALIZE(adapter,
542 NETXEN_ROMUSB_GLB_PEGTUNE_DONE));
543 /* Handshake with the card before we register the devices. */
544 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
546 /* leave the hw in the same state as reboot */
547 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));
548 netxen_pinit_from_rom(adapter, 0);
550 netxen_load_firmware(adapter);
551 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
555 * See if the firmware gave us a virtual-physical port mapping.
557 i = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_V2P(adapter->portnum)));
559 physical_port[adapter->portnum] = i;
561 netif_carrier_off(netdev);
562 netif_stop_queue(netdev);
564 if ((err = register_netdev(netdev))) {
565 printk(KERN_ERR "%s: register_netdev failed port #%d"
566 " aborting\n", netxen_nic_driver_name,
569 goto err_out_free_dev;
572 pci_set_drvdata(pdev, adapter);
574 switch (adapter->ahw.board_type) {
576 printk(KERN_INFO "%s: QUAD GbE board initialized\n",
577 netxen_nic_driver_name);
580 case NETXEN_NIC_XGBE:
581 printk(KERN_INFO "%s: XGbE board initialized\n",
582 netxen_nic_driver_name);
586 adapter->driver_mismatch = 0;
591 if (adapter->portnum == 0)
592 netxen_free_adapter_offload(adapter);
594 err_out_free_rx_buffer:
595 for (i = 0; i < MAX_RCV_CTX; ++i) {
596 recv_ctx = &adapter->recv_ctx[i];
597 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
598 rcv_desc = &recv_ctx->rcv_desc[ring];
599 if (rcv_desc->rx_buf_arr != NULL) {
600 vfree(rcv_desc->rx_buf_arr);
601 rcv_desc->rx_buf_arr = NULL;
607 err_out_free_adapter:
608 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
609 pci_disable_msi(pdev);
611 pci_set_drvdata(pdev, NULL);
628 pci_release_regions(pdev);
630 err_out_disable_pdev:
631 pci_disable_device(pdev);
635 static void __devexit netxen_nic_remove(struct pci_dev *pdev)
637 struct netxen_adapter *adapter;
638 struct net_device *netdev;
639 struct netxen_rx_buffer *buffer;
640 struct netxen_recv_context *recv_ctx;
641 struct netxen_rcv_desc_ctx *rcv_desc;
645 adapter = pci_get_drvdata(pdev);
649 netdev = adapter->netdev;
651 netxen_nic_disable_int(adapter);
653 free_irq(adapter->irq, adapter);
655 if (adapter->stop_port)
656 adapter->stop_port(adapter);
658 if ((adapter->flags & NETXEN_NIC_MSI_ENABLED))
659 pci_disable_msi(pdev);
661 if (adapter->portnum == 0)
662 netxen_free_adapter_offload(adapter);
664 if(adapter->portnum == 0) {
665 /* leave the hw in the same state as reboot */
666 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));
667 netxen_pinit_from_rom(adapter, 0);
669 netxen_load_firmware(adapter);
670 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
673 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC)
674 netxen_free_hw_resources(adapter);
676 for (ctxid = 0; ctxid < MAX_RCV_CTX; ++ctxid) {
677 recv_ctx = &adapter->recv_ctx[ctxid];
678 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
679 rcv_desc = &recv_ctx->rcv_desc[ring];
680 for (i = 0; i < rcv_desc->max_rx_desc_count; ++i) {
681 buffer = &(rcv_desc->rx_buf_arr[i]);
682 if (buffer->state == NETXEN_BUFFER_FREE)
684 pci_unmap_single(pdev, buffer->dma,
687 if (buffer->skb != NULL)
688 dev_kfree_skb_any(buffer->skb);
690 vfree(rcv_desc->rx_buf_arr);
694 unregister_netdev(netdev);
696 vfree(adapter->cmd_buf_arr);
698 iounmap(adapter->ahw.db_base);
699 iounmap(adapter->ahw.pci_base0);
700 iounmap(adapter->ahw.pci_base1);
701 iounmap(adapter->ahw.pci_base2);
703 pci_release_regions(pdev);
704 pci_disable_device(pdev);
705 pci_set_drvdata(pdev, NULL);
711 * Called when a network interface is made active
712 * @returns 0 on success, negative value on failure
714 static int netxen_nic_open(struct net_device *netdev)
716 struct netxen_adapter *adapter = (struct netxen_adapter *)netdev->priv;
720 if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC) {
721 err = netxen_init_firmware(adapter);
723 printk(KERN_ERR "Failed to init firmware\n");
726 netxen_nic_flash_print(adapter);
728 /* setup all the resources for the Phantom... */
729 /* this include the descriptors for rcv, tx, and status */
730 netxen_nic_clear_stats(adapter);
731 err = netxen_nic_hw_resources(adapter);
733 printk(KERN_ERR "Error in setting hw resources:%d\n",
737 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
738 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++)
739 netxen_post_rx_buffers(adapter, ctx, ring);
741 adapter->irq = adapter->ahw.pdev->irq;
742 err = request_irq(adapter->ahw.pdev->irq, netxen_intr,
743 IRQF_SHARED|IRQF_SAMPLE_RANDOM, netdev->name,
746 printk(KERN_ERR "request_irq failed with: %d\n", err);
747 netxen_free_hw_resources(adapter);
751 adapter->is_up = NETXEN_ADAPTER_UP_MAGIC;
753 if (!adapter->driver_mismatch)
754 mod_timer(&adapter->watchdog_timer, jiffies);
756 netxen_nic_enable_int(adapter);
758 /* Done here again so that even if phantom sw overwrote it,
760 if (adapter->macaddr_set)
761 adapter->macaddr_set(adapter, netdev->dev_addr);
762 if (adapter->init_port
763 && adapter->init_port(adapter, adapter->portnum) != 0) {
764 del_timer_sync(&adapter->watchdog_timer);
765 printk(KERN_ERR "%s: Failed to initialize port %d\n",
766 netxen_nic_driver_name, adapter->portnum);
770 netxen_nic_set_link_parameters(adapter);
772 netxen_nic_set_multi(netdev);
773 if (adapter->set_mtu)
774 adapter->set_mtu(adapter, netdev->mtu);
776 if (!adapter->driver_mismatch)
777 netif_start_queue(netdev);
783 * netxen_nic_close - Disables a network interface entry point
785 static int netxen_nic_close(struct net_device *netdev)
787 struct netxen_adapter *adapter = netdev_priv(netdev);
789 struct netxen_cmd_buffer *cmd_buff;
790 struct netxen_skb_frag *buffrag;
792 netif_carrier_off(netdev);
793 netif_stop_queue(netdev);
795 cmd_buff = adapter->cmd_buf_arr;
796 for (i = 0; i < adapter->max_tx_desc_count; i++) {
797 buffrag = cmd_buff->frag_array;
799 pci_unmap_single(adapter->pdev, buffrag->dma,
800 buffrag->length, PCI_DMA_TODEVICE);
801 buffrag->dma = (u64) NULL;
803 for (j = 0; j < cmd_buff->frag_count; j++) {
806 pci_unmap_page(adapter->pdev, buffrag->dma,
809 buffrag->dma = (u64) NULL;
812 /* Free the skb we received in netxen_nic_xmit_frame */
814 dev_kfree_skb_any(cmd_buff->skb);
815 cmd_buff->skb = NULL;
819 FLUSH_SCHEDULED_WORK();
820 del_timer_sync(&adapter->watchdog_timer);
825 static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
827 struct netxen_adapter *adapter = netdev_priv(netdev);
828 struct netxen_hardware_context *hw = &adapter->ahw;
829 unsigned int first_seg_len = skb->len - skb->data_len;
830 struct netxen_skb_frag *buffrag;
834 u32 saved_producer = 0;
835 struct cmd_desc_type0 *hwdesc;
837 struct netxen_cmd_buffer *pbuf = NULL;
838 static int dropped_packet = 0;
840 u32 local_producer = 0;
841 u32 max_tx_desc_count = 0;
842 u32 last_cmd_consumer = 0;
845 adapter->stats.xmitcalled++;
846 frag_count = skb_shinfo(skb)->nr_frags + 1;
848 if (unlikely(skb->len <= 0)) {
849 dev_kfree_skb_any(skb);
850 adapter->stats.badskblen++;
854 if (frag_count > MAX_BUFFERS_PER_CMD) {
855 printk("%s: %s netxen_nic_xmit_frame: frag_count (%d)"
856 "too large, can handle only %d frags\n",
857 netxen_nic_driver_name, netdev->name,
858 frag_count, MAX_BUFFERS_PER_CMD);
859 adapter->stats.txdropped++;
860 if ((++dropped_packet & 0xff) == 0xff)
861 printk("%s: %s droppped packets = %d\n",
862 netxen_nic_driver_name, netdev->name,
869 * Everything is set up. Now, we just need to transmit it out.
870 * Note that we have to copy the contents of buffer over to
871 * right place. Later on, this can be optimized out by de-coupling the
872 * producer index from the buffer index.
874 retry_getting_window:
875 spin_lock_bh(&adapter->tx_lock);
876 if (adapter->total_threads >= MAX_XMIT_PRODUCERS) {
877 spin_unlock_bh(&adapter->tx_lock);
884 for (i = 0; i < 20; i++)
885 cpu_relax(); /*This a nop instr on i386 */
887 goto retry_getting_window;
889 local_producer = adapter->cmd_producer;
890 /* There 4 fragments per descriptor */
891 no_of_desc = (frag_count + 3) >> 2;
892 if (netdev->features & NETIF_F_TSO) {
893 if (skb_shinfo(skb)->gso_size > 0) {
896 if ((ip_hdrlen(skb) + tcp_hdrlen(skb) +
897 sizeof(struct ethhdr)) >
898 (sizeof(struct cmd_desc_type0) - 2)) {
903 k = adapter->cmd_producer;
904 max_tx_desc_count = adapter->max_tx_desc_count;
905 last_cmd_consumer = adapter->last_cmd_consumer;
906 if ((k + no_of_desc) >=
907 ((last_cmd_consumer <= k) ? last_cmd_consumer + max_tx_desc_count :
908 last_cmd_consumer)) {
909 netif_stop_queue(netdev);
910 adapter->flags |= NETXEN_NETDEV_STATUS;
911 spin_unlock_bh(&adapter->tx_lock);
912 return NETDEV_TX_BUSY;
914 k = get_index_range(k, max_tx_desc_count, no_of_desc);
915 adapter->cmd_producer = k;
916 adapter->total_threads++;
917 adapter->num_threads++;
919 spin_unlock_bh(&adapter->tx_lock);
920 /* Copy the descriptors into the hardware */
921 producer = local_producer;
922 saved_producer = producer;
923 hwdesc = &hw->cmd_desc_head[producer];
924 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
925 /* Take skb->data itself */
926 pbuf = &adapter->cmd_buf_arr[producer];
927 if ((netdev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size > 0) {
928 pbuf->mss = skb_shinfo(skb)->gso_size;
929 hwdesc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
934 pbuf->total_length = skb->len;
936 pbuf->cmd = TX_ETHER_PKT;
937 pbuf->frag_count = frag_count;
938 pbuf->port = adapter->portnum;
939 buffrag = &pbuf->frag_array[0];
940 buffrag->dma = pci_map_single(adapter->pdev, skb->data, first_seg_len,
942 buffrag->length = first_seg_len;
943 netxen_set_cmd_desc_totallength(hwdesc, skb->len);
944 netxen_set_cmd_desc_num_of_buff(hwdesc, frag_count);
945 netxen_set_cmd_desc_opcode(hwdesc, TX_ETHER_PKT);
947 netxen_set_cmd_desc_port(hwdesc, adapter->portnum);
948 netxen_set_cmd_desc_ctxid(hwdesc, adapter->portnum);
949 hwdesc->buffer1_length = cpu_to_le16(first_seg_len);
950 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
952 for (i = 1, k = 1; i < frag_count; i++, k++) {
953 struct skb_frag_struct *frag;
955 unsigned long offset;
958 /* move to next desc. if there is a need */
959 if ((i & 0x3) == 0) {
961 producer = get_next_index(producer,
962 adapter->max_tx_desc_count);
963 hwdesc = &hw->cmd_desc_head[producer];
964 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
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;
978 DPRINTK(INFO, "for loop. i=%d k=%d\n", i, k);
981 hwdesc->buffer1_length = cpu_to_le16(temp_len);
982 hwdesc->addr_buffer1 = cpu_to_le64(temp_dma);
985 hwdesc->buffer2_length = cpu_to_le16(temp_len);
986 hwdesc->addr_buffer2 = cpu_to_le64(temp_dma);
989 hwdesc->buffer3_length = cpu_to_le16(temp_len);
990 hwdesc->addr_buffer3 = cpu_to_le64(temp_dma);
993 hwdesc->buffer4_length = cpu_to_le16(temp_len);
994 hwdesc->addr_buffer4 = cpu_to_le64(temp_dma);
999 producer = get_next_index(producer, adapter->max_tx_desc_count);
1001 /* might change opcode to TX_TCP_LSO */
1002 netxen_tso_check(adapter, &hw->cmd_desc_head[saved_producer], skb);
1004 /* For LSO, we need to copy the MAC/IP/TCP headers into
1005 * the descriptor ring
1007 if (netxen_get_cmd_desc_opcode(&hw->cmd_desc_head[saved_producer])
1009 int hdr_len, first_hdr_len, more_hdr;
1010 hdr_len = hw->cmd_desc_head[saved_producer].total_hdr_length;
1011 if (hdr_len > (sizeof(struct cmd_desc_type0) - 2)) {
1012 first_hdr_len = sizeof(struct cmd_desc_type0) - 2;
1015 first_hdr_len = hdr_len;
1018 /* copy the MAC/IP/TCP headers to the cmd descriptor list */
1019 hwdesc = &hw->cmd_desc_head[producer];
1021 /* copy the first 64 bytes */
1022 memcpy(((void *)hwdesc) + 2,
1023 (void *)(skb->data), first_hdr_len);
1024 producer = get_next_index(producer, max_tx_desc_count);
1027 hwdesc = &hw->cmd_desc_head[producer];
1028 /* copy the next 64 bytes - should be enough except
1029 * for pathological case
1031 skb_copy_from_linear_data_offset(skb, first_hdr_len,
1035 producer = get_next_index(producer, max_tx_desc_count);
1039 i = netxen_get_cmd_desc_totallength(&hw->cmd_desc_head[saved_producer]);
1041 hw->cmd_desc_head[saved_producer].flags_opcode =
1042 cpu_to_le16(hw->cmd_desc_head[saved_producer].flags_opcode);
1043 hw->cmd_desc_head[saved_producer].num_of_buffers_total_length =
1044 cpu_to_le32(hw->cmd_desc_head[saved_producer].
1045 num_of_buffers_total_length);
1047 spin_lock_bh(&adapter->tx_lock);
1048 adapter->stats.txbytes += i;
1050 /* Code to update the adapter considering how many producer threads
1051 are currently working */
1052 if ((--adapter->num_threads) == 0) {
1053 /* This is the last thread */
1054 u32 crb_producer = adapter->cmd_producer;
1055 netxen_nic_update_cmd_producer(adapter, crb_producer);
1057 adapter->total_threads = 0;
1060 adapter->stats.xmitfinished++;
1061 spin_unlock_bh(&adapter->tx_lock);
1063 netdev->trans_start = jiffies;
1065 DPRINTK(INFO, "wrote CMD producer %x to phantom\n", producer);
1067 DPRINTK(INFO, "Done. Send\n");
1068 return NETDEV_TX_OK;
1071 static void netxen_watchdog(unsigned long v)
1073 struct netxen_adapter *adapter = (struct netxen_adapter *)v;
1075 SCHEDULE_WORK(&adapter->watchdog_task);
1078 static void netxen_tx_timeout(struct net_device *netdev)
1080 struct netxen_adapter *adapter = (struct netxen_adapter *)
1081 netdev_priv(netdev);
1082 SCHEDULE_WORK(&adapter->tx_timeout_task);
1085 static void netxen_tx_timeout_task(struct work_struct *work)
1087 struct netxen_adapter *adapter =
1088 container_of(work, struct netxen_adapter, tx_timeout_task);
1089 unsigned long flags;
1091 printk(KERN_ERR "%s %s: transmit timeout, resetting.\n",
1092 netxen_nic_driver_name, adapter->netdev->name);
1094 spin_lock_irqsave(&adapter->lock, flags);
1095 netxen_nic_close(adapter->netdev);
1096 netxen_nic_open(adapter->netdev);
1097 spin_unlock_irqrestore(&adapter->lock, flags);
1098 adapter->netdev->trans_start = jiffies;
1099 netif_wake_queue(adapter->netdev);
1103 netxen_handle_int(struct netxen_adapter *adapter, struct net_device *netdev)
1107 DPRINTK(INFO, "Entered handle ISR\n");
1108 adapter->stats.ints++;
1110 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
1114 our_int = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
1115 /* not our interrupt */
1116 if ((our_int & (0x80 << adapter->portnum)) == 0)
1118 netxen_nic_disable_int(adapter);
1119 /* Window = 0 or 1 */
1121 writel(0xffffffff, PCI_OFFSET_SECOND_RANGE(adapter,
1122 ISR_INT_TARGET_STATUS));
1123 mask = readl(pci_base_offset(adapter, ISR_INT_VECTOR));
1124 } while (((mask & 0x80) != 0) && (++count < 32));
1125 if ((mask & 0x80) != 0)
1126 printk("Could not disable interrupt completely\n");
1130 if (netxen_nic_rx_has_work(adapter) || netxen_nic_tx_has_work(adapter)) {
1131 if (netif_rx_schedule_prep(netdev)) {
1133 * Interrupts are already disabled.
1135 __netif_rx_schedule(netdev);
1137 static unsigned int intcount = 0;
1138 if ((++intcount & 0xfff) == 0xfff)
1140 "%s: %s interrupt %d while in poll\n",
1141 netxen_nic_driver_name, netdev->name,
1148 netxen_nic_enable_int(adapter);
1155 * netxen_intr - Interrupt Handler
1156 * @irq: interrupt number
1157 * data points to adapter stucture (which may be handling more than 1 port
1159 irqreturn_t netxen_intr(int irq, void *data)
1161 struct netxen_adapter *adapter;
1162 struct net_device *netdev;
1164 if (unlikely(!irq)) {
1165 return IRQ_NONE; /* Not our interrupt */
1168 adapter = (struct netxen_adapter *)data;
1169 netdev = adapter->netdev;
1170 /* process our status queue (for all 4 ports) */
1171 if (netif_running(netdev))
1172 netxen_handle_int(adapter, netdev);
1177 static int netxen_nic_poll(struct net_device *netdev, int *budget)
1179 struct netxen_adapter *adapter = netdev_priv(netdev);
1180 int work_to_do = min(*budget, netdev->quota);
1186 DPRINTK(INFO, "polling for %d descriptors\n", *budget);
1189 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
1191 * Fairness issue. This will give undue weight to the
1192 * receive context 0.
1196 * To avoid starvation, we give each of our receivers,
1197 * a fraction of the quota. Sometimes, it might happen that we
1198 * have enough quota to process every packet, but since all the
1199 * packets are on one context, it gets only half of the quota,
1200 * and ends up not processing it.
1202 this_work_done = netxen_process_rcv_ring(adapter, ctx,
1205 work_done += this_work_done;
1208 netdev->quota -= work_done;
1209 *budget -= work_done;
1211 if (work_done >= work_to_do && netxen_nic_rx_has_work(adapter) != 0)
1214 if (netxen_process_cmd_ring((unsigned long)adapter) == 0)
1217 DPRINTK(INFO, "new work_done: %d work_to_do: %d\n",
1218 work_done, work_to_do);
1220 netif_rx_complete(netdev);
1221 netxen_nic_enable_int(adapter);
1227 #ifdef CONFIG_NET_POLL_CONTROLLER
1228 static void netxen_nic_poll_controller(struct net_device *netdev)
1230 struct netxen_adapter *adapter = netdev_priv(netdev);
1231 disable_irq(adapter->irq);
1232 netxen_intr(adapter->irq, adapter);
1233 enable_irq(adapter->irq);
1237 static struct pci_driver netxen_driver = {
1238 .name = netxen_nic_driver_name,
1239 .id_table = netxen_pci_tbl,
1240 .probe = netxen_nic_probe,
1241 .remove = __devexit_p(netxen_nic_remove)
1244 /* Driver Registration on NetXen card */
1246 static int __init netxen_init_module(void)
1248 if ((netxen_workq = create_singlethread_workqueue("netxen")) == 0)
1251 return pci_register_driver(&netxen_driver);
1254 module_init(netxen_init_module);
1256 static void __exit netxen_exit_module(void)
1259 * Wait for some time to allow the dma to drain, if any.
1261 pci_unregister_driver(&netxen_driver);
1262 destroy_workqueue(netxen_workq);
1265 module_exit(netxen_exit_module);