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;
159 static void netxen_nic_disable_int(struct netxen_adapter *adapter)
161 uint32_t mask = 0x7ff;
164 DPRINTK(1, INFO, "Entered ISR Disable \n");
166 switch (adapter->portnum) {
168 writel(0x0, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_0));
171 writel(0x0, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_1));
174 writel(0x0, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_2));
177 writel(0x0, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_3));
181 if (adapter->intr_scheme != -1 &&
182 adapter->intr_scheme != INTR_SCHEME_PERPORT)
183 writel(mask,PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_MASK));
185 /* Window = 0 or 1 */
186 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
189 PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_TARGET_STATUS));
190 mask = readl(pci_base_offset(adapter, ISR_INT_VECTOR));
197 printk(KERN_NOTICE "%s: Failed to disable interrupt completely\n",
198 netxen_nic_driver_name);
202 DPRINTK(1, INFO, "Done with Disable Int\n");
205 static void netxen_nic_enable_int(struct netxen_adapter *adapter)
209 DPRINTK(1, INFO, "Entered ISR Enable \n");
211 if (adapter->intr_scheme != -1 &&
212 adapter->intr_scheme != INTR_SCHEME_PERPORT) {
213 switch (adapter->ahw.board_type) {
217 case NETXEN_NIC_XGBE:
225 writel(mask, PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_MASK));
228 switch (adapter->portnum) {
230 writel(0x1, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_0));
233 writel(0x1, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_1));
236 writel(0x1, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_2));
239 writel(0x1, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_3));
243 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
245 if (adapter->intr_scheme != -1 &&
246 adapter->intr_scheme != INTR_SCHEME_PERPORT) {
247 writel(0X0, NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
250 PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_TARGET_MASK));
253 DPRINTK(1, INFO, "Done with enable Int\n");
259 * The Linux system will invoke this after identifying the vendor ID and
260 * device Id in the pci_tbl supported by this module.
262 * A quad port card has one operational PCI config space, (function 0),
263 * which is used to access all four ports.
265 * This routine will initialize the adapter, and setup the global parameters
266 * along with the port's specific structure.
269 netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
271 struct net_device *netdev = NULL;
272 struct netxen_adapter *adapter = NULL;
273 void __iomem *mem_ptr0 = NULL;
274 void __iomem *mem_ptr1 = NULL;
275 void __iomem *mem_ptr2 = NULL;
276 unsigned long first_page_group_end;
277 unsigned long first_page_group_start;
280 u8 __iomem *db_ptr = NULL;
281 unsigned long mem_base, mem_len, db_base, db_len;
282 int pci_using_dac, i = 0, err;
284 struct netxen_recv_context *recv_ctx = NULL;
285 struct netxen_rcv_desc_ctx *rcv_desc = NULL;
286 struct netxen_cmd_buffer *cmd_buf_arr = NULL;
287 u64 mac_addr[FLASH_NUM_PORTS + 1];
290 int pci_func_id = PCI_FUNC(pdev->devfn);
292 printk(KERN_INFO "%s \n", netxen_nic_driver_string);
294 if (pdev->class != 0x020000) {
295 printk(KERN_ERR"NetXen function %d, class %x will not"
296 "be enabled.\n",pci_func_id, pdev->class);
299 if ((err = pci_enable_device(pdev)))
301 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
303 goto err_out_disable_pdev;
306 if ((err = pci_request_regions(pdev, netxen_nic_driver_name)))
307 goto err_out_disable_pdev;
309 pci_set_master(pdev);
310 pci_read_config_byte(pdev, PCI_REVISION_ID, &nx_p2_id);
311 if (nx_p2_id == NX_P2_C1 &&
312 (pci_set_dma_mask(pdev, DMA_35BIT_MASK) == 0) &&
313 (pci_set_consistent_dma_mask(pdev, DMA_35BIT_MASK) == 0)) {
316 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) ||
317 (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK)))
318 goto err_out_free_res;
324 netdev = alloc_etherdev(sizeof(struct netxen_adapter));
326 printk(KERN_ERR"%s: Failed to allocate memory for the "
327 "device block.Check system memory resource"
328 " usage.\n", netxen_nic_driver_name);
329 goto err_out_free_res;
332 SET_MODULE_OWNER(netdev);
333 SET_NETDEV_DEV(netdev, &pdev->dev);
335 adapter = netdev->priv;
336 memset(adapter, 0 , sizeof(struct netxen_adapter));
338 adapter->ahw.pdev = pdev;
339 adapter->ahw.pci_func = pci_func_id;
340 spin_lock_init(&adapter->tx_lock);
341 spin_lock_init(&adapter->lock);
343 /* remap phys address */
344 mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */
345 mem_len = pci_resource_len(pdev, 0);
347 /* 128 Meg of memory */
348 if (mem_len == NETXEN_PCI_128MB_SIZE) {
349 mem_ptr0 = ioremap(mem_base, FIRST_PAGE_GROUP_SIZE);
350 mem_ptr1 = ioremap(mem_base + SECOND_PAGE_GROUP_START,
351 SECOND_PAGE_GROUP_SIZE);
352 mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START,
353 THIRD_PAGE_GROUP_SIZE);
354 first_page_group_start = FIRST_PAGE_GROUP_START;
355 first_page_group_end = FIRST_PAGE_GROUP_END;
356 } else if (mem_len == NETXEN_PCI_32MB_SIZE) {
357 mem_ptr1 = ioremap(mem_base, SECOND_PAGE_GROUP_SIZE);
358 mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START -
359 SECOND_PAGE_GROUP_START, THIRD_PAGE_GROUP_SIZE);
360 first_page_group_start = 0;
361 first_page_group_end = 0;
364 goto err_out_free_netdev;
367 if (((mem_ptr0 == 0UL) && (mem_len == NETXEN_PCI_128MB_SIZE)) ||
368 (mem_ptr1 == 0UL) || (mem_ptr2 == 0UL)) {
370 "Cannot remap adapter memory aborting.:"
371 "0 -> %p, 1 -> %p, 2 -> %p\n",
372 mem_ptr0, mem_ptr1, mem_ptr2);
375 goto err_out_iounmap;
377 db_base = pci_resource_start(pdev, 4); /* doorbell is on bar 4 */
378 db_len = pci_resource_len(pdev, 4);
381 printk(KERN_ERR "%s: doorbell is disabled\n",
382 netxen_nic_driver_name);
384 goto err_out_iounmap;
386 DPRINTK(INFO, "doorbell ioremap from %lx a size of %lx\n", db_base,
389 db_ptr = ioremap(db_base, NETXEN_DB_MAPSIZE_BYTES);
391 printk(KERN_ERR "%s: Failed to allocate doorbell map.",
392 netxen_nic_driver_name);
394 goto err_out_iounmap;
396 DPRINTK(INFO, "doorbell ioremaped at %p\n", db_ptr);
398 adapter->ahw.pci_base0 = mem_ptr0;
399 adapter->ahw.first_page_group_start = first_page_group_start;
400 adapter->ahw.first_page_group_end = first_page_group_end;
401 adapter->ahw.pci_base1 = mem_ptr1;
402 adapter->ahw.pci_base2 = mem_ptr2;
403 adapter->ahw.db_base = db_ptr;
404 adapter->ahw.db_len = db_len;
406 adapter->netdev = netdev;
407 adapter->pdev = pdev;
409 /* this will be read from FW later */
410 adapter->intr_scheme = -1;
412 /* This will be reset for mezz cards */
413 adapter->portnum = pci_func_id;
414 adapter->status &= ~NETXEN_NETDEV_STATUS;
416 netdev->open = netxen_nic_open;
417 netdev->stop = netxen_nic_close;
418 netdev->hard_start_xmit = netxen_nic_xmit_frame;
419 netdev->get_stats = netxen_nic_get_stats;
420 netdev->set_multicast_list = netxen_nic_set_multi;
421 netdev->set_mac_address = netxen_nic_set_mac;
422 netdev->change_mtu = netxen_nic_change_mtu;
423 netdev->tx_timeout = netxen_tx_timeout;
424 netdev->watchdog_timeo = HZ;
426 netxen_nic_change_mtu(netdev, netdev->mtu);
428 SET_ETHTOOL_OPS(netdev, &netxen_nic_ethtool_ops);
429 netdev->poll = netxen_nic_poll;
430 netdev->weight = NETXEN_NETDEV_WEIGHT;
431 #ifdef CONFIG_NET_POLL_CONTROLLER
432 netdev->poll_controller = netxen_nic_poll_controller;
434 /* ScatterGather support */
435 netdev->features = NETIF_F_SG;
436 netdev->features |= NETIF_F_IP_CSUM;
437 netdev->features |= NETIF_F_TSO;
440 netdev->features |= NETIF_F_HIGHDMA;
442 if (pci_enable_msi(pdev))
443 adapter->flags &= ~NETXEN_NIC_MSI_ENABLED;
445 adapter->flags |= NETXEN_NIC_MSI_ENABLED;
447 netdev->irq = pdev->irq;
448 INIT_WORK(&adapter->tx_timeout_task, netxen_tx_timeout_task);
451 * Set the CRB window to invalid. If any register in window 0 is
452 * accessed it should set the window to 0 and then reset it to 1.
454 adapter->curr_window = 255;
456 /* initialize the adapter */
457 netxen_initialize_adapter_hw(adapter);
460 * Adapter in our case is quad port so initialize it before
461 * initializing the ports
464 netxen_initialize_adapter_ops(adapter);
466 adapter->max_tx_desc_count = MAX_CMD_DESCRIPTORS_HOST;
467 if ((adapter->ahw.boardcfg.board_type == NETXEN_BRDTYPE_P2_SB35_4G) ||
468 (adapter->ahw.boardcfg.board_type ==
469 NETXEN_BRDTYPE_P2_SB31_2G))
470 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_1G;
472 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS;
473 adapter->max_jumbo_rx_desc_count = MAX_JUMBO_RCV_DESCRIPTORS;
474 adapter->max_lro_rx_desc_count = MAX_LRO_RCV_DESCRIPTORS;
476 cmd_buf_arr = (struct netxen_cmd_buffer *)vmalloc(TX_RINGSIZE);
477 if (cmd_buf_arr == NULL) {
479 "%s: Could not allocate cmd_buf_arr memory:%d\n",
480 netxen_nic_driver_name, (int)TX_RINGSIZE);
482 goto err_out_free_adapter;
484 memset(cmd_buf_arr, 0, TX_RINGSIZE);
485 adapter->cmd_buf_arr = cmd_buf_arr;
487 for (i = 0; i < MAX_RCV_CTX; ++i) {
488 recv_ctx = &adapter->recv_ctx[i];
489 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
490 rcv_desc = &recv_ctx->rcv_desc[ring];
491 switch (RCV_DESC_TYPE(ring)) {
492 case RCV_DESC_NORMAL:
493 rcv_desc->max_rx_desc_count =
494 adapter->max_rx_desc_count;
495 rcv_desc->flags = RCV_DESC_NORMAL;
496 rcv_desc->dma_size = RX_DMA_MAP_LEN;
497 rcv_desc->skb_size = MAX_RX_BUFFER_LENGTH;
501 rcv_desc->max_rx_desc_count =
502 adapter->max_jumbo_rx_desc_count;
503 rcv_desc->flags = RCV_DESC_JUMBO;
504 rcv_desc->dma_size = RX_JUMBO_DMA_MAP_LEN;
505 rcv_desc->skb_size = MAX_RX_JUMBO_BUFFER_LENGTH;
509 rcv_desc->max_rx_desc_count =
510 adapter->max_lro_rx_desc_count;
511 rcv_desc->flags = RCV_DESC_LRO;
512 rcv_desc->dma_size = RX_LRO_DMA_MAP_LEN;
513 rcv_desc->skb_size = MAX_RX_LRO_BUFFER_LENGTH;
517 rcv_desc->rx_buf_arr = (struct netxen_rx_buffer *)
518 vmalloc(RCV_BUFFSIZE);
520 if (rcv_desc->rx_buf_arr == NULL) {
521 printk(KERN_ERR "%s: Could not allocate"
522 "rcv_desc->rx_buf_arr memory:%d\n",
523 netxen_nic_driver_name,
526 goto err_out_free_rx_buffer;
528 memset(rcv_desc->rx_buf_arr, 0, RCV_BUFFSIZE);
533 netxen_initialize_adapter_sw(adapter); /* initialize the buffers in adapter */
535 /* Mezz cards have PCI function 0,2,3 enabled */
536 if ((adapter->ahw.boardcfg.board_type == NETXEN_BRDTYPE_P2_SB31_10G_IMEZ)
537 && (pci_func_id >= 2))
538 adapter->portnum = pci_func_id - 2;
541 if(adapter->portnum == 0) {
542 netxen_pinit_from_rom(adapter, 0);
544 netxen_load_firmware(adapter);
548 init_timer(&adapter->watchdog_timer);
549 adapter->ahw.xg_linkup = 0;
550 adapter->watchdog_timer.function = &netxen_watchdog;
551 adapter->watchdog_timer.data = (unsigned long)adapter;
552 INIT_WORK(&adapter->watchdog_task, netxen_watchdog_task);
553 adapter->ahw.pdev = pdev;
554 adapter->proc_cmd_buf_counter = 0;
555 adapter->ahw.revision_id = nx_p2_id;
557 /* make sure Window == 1 */
558 netxen_nic_pci_change_crbwindow(adapter, 1);
560 netxen_nic_update_cmd_producer(adapter, 0);
561 netxen_nic_update_cmd_consumer(adapter, 0);
562 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_HOST_CMD_ADDR_LO));
564 if (netxen_is_flash_supported(adapter) == 0 &&
565 netxen_get_flash_mac_addr(adapter, mac_addr) == 0)
571 unsigned char *p = (unsigned char *)&mac_addr[adapter->portnum];
572 netdev->dev_addr[0] = *(p + 5);
573 netdev->dev_addr[1] = *(p + 4);
574 netdev->dev_addr[2] = *(p + 3);
575 netdev->dev_addr[3] = *(p + 2);
576 netdev->dev_addr[4] = *(p + 1);
577 netdev->dev_addr[5] = *(p + 0);
579 memcpy(netdev->perm_addr, netdev->dev_addr,
581 if (!is_valid_ether_addr(netdev->perm_addr)) {
582 printk(KERN_ERR "%s: Bad MAC address "
583 "%02x:%02x:%02x:%02x:%02x:%02x.\n",
584 netxen_nic_driver_name,
590 netdev->dev_addr[5]);
592 if (adapter->macaddr_set)
593 adapter->macaddr_set(adapter,
598 if (adapter->portnum == 0) {
599 err = netxen_initialize_adapter_offload(adapter);
601 goto err_out_free_rx_buffer;
602 val = readl(NETXEN_CRB_NORMALIZE(adapter,
603 NETXEN_CAM_RAM(0x1fc)));
604 if (val == 0x55555555) {
605 /* This is the first boot after power up */
606 netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(0x4), &val);
609 netxen_nic_write_w0(adapter, NETXEN_PCIE_REG(0x4), val);
610 netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(0x4), &val);
612 printk(KERN_ERR "%s: failed to set MSI bit in PCI-e reg\n",
613 netxen_nic_driver_name);
615 val = readl(NETXEN_CRB_NORMALIZE(adapter,
616 NETXEN_ROMUSB_GLB_SW_RESET));
617 printk(KERN_INFO"NetXen: read 0x%08x for reset reg.\n",val);
618 if (val != 0x80000f) {
619 /* clear the register for future unloads/loads */
620 writel(0, NETXEN_CRB_NORMALIZE(adapter,
621 NETXEN_CAM_RAM(0x1fc)));
622 printk(KERN_ERR "ERROR in NetXen HW init sequence.\n");
624 goto err_out_free_dev;
628 /* clear the register for future unloads/loads */
629 writel(0, NETXEN_CRB_NORMALIZE(adapter, NETXEN_CAM_RAM(0x1fc)));
630 printk(KERN_INFO "State: 0x%0x\n",
631 readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)));
634 * Tell the hardware our version number.
636 i = (_NETXEN_NIC_LINUX_MAJOR << 16)
637 | ((_NETXEN_NIC_LINUX_MINOR << 8))
638 | (_NETXEN_NIC_LINUX_SUBVERSION);
639 writel(i, NETXEN_CRB_NORMALIZE(adapter, CRB_DRIVER_VERSION));
641 /* Unlock the HW, prompting the boot sequence */
643 NETXEN_CRB_NORMALIZE(adapter,
644 NETXEN_ROMUSB_GLB_PEGTUNE_DONE));
645 /* Handshake with the card before we register the devices. */
646 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
650 * See if the firmware gave us a virtual-physical port mapping.
652 i = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_V2P(adapter->portnum)));
654 physical_port[adapter->portnum] = i;
656 netif_carrier_off(netdev);
657 netif_stop_queue(netdev);
659 if ((err = register_netdev(netdev))) {
660 printk(KERN_ERR "%s: register_netdev failed port #%d"
661 " aborting\n", netxen_nic_driver_name,
664 goto err_out_free_dev;
667 pci_set_drvdata(pdev, adapter);
669 switch (adapter->ahw.board_type) {
671 printk(KERN_INFO "%s: QUAD GbE board initialized\n",
672 netxen_nic_driver_name);
675 case NETXEN_NIC_XGBE:
676 printk(KERN_INFO "%s: XGbE board initialized\n",
677 netxen_nic_driver_name);
681 adapter->driver_mismatch = 0;
686 if (adapter->portnum == 0)
687 netxen_free_adapter_offload(adapter);
689 err_out_free_rx_buffer:
690 for (i = 0; i < MAX_RCV_CTX; ++i) {
691 recv_ctx = &adapter->recv_ctx[i];
692 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
693 rcv_desc = &recv_ctx->rcv_desc[ring];
694 if (rcv_desc->rx_buf_arr != NULL) {
695 vfree(rcv_desc->rx_buf_arr);
696 rcv_desc->rx_buf_arr = NULL;
702 err_out_free_adapter:
703 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
704 pci_disable_msi(pdev);
706 pci_set_drvdata(pdev, NULL);
723 pci_release_regions(pdev);
725 err_out_disable_pdev:
726 pci_disable_device(pdev);
730 static void __devexit netxen_nic_remove(struct pci_dev *pdev)
732 struct netxen_adapter *adapter;
733 struct net_device *netdev;
734 struct netxen_rx_buffer *buffer;
735 struct netxen_recv_context *recv_ctx;
736 struct netxen_rcv_desc_ctx *rcv_desc;
738 static int init_firmware_done = 0;
740 adapter = pci_get_drvdata(pdev);
744 netdev = adapter->netdev;
746 unregister_netdev(netdev);
748 if (adapter->stop_port)
749 adapter->stop_port(adapter);
751 netxen_nic_disable_int(adapter);
754 free_irq(adapter->irq, adapter);
756 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) {
757 init_firmware_done++;
758 netxen_free_hw_resources(adapter);
761 for (ctxid = 0; ctxid < MAX_RCV_CTX; ++ctxid) {
762 recv_ctx = &adapter->recv_ctx[ctxid];
763 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
764 rcv_desc = &recv_ctx->rcv_desc[ring];
765 for (i = 0; i < rcv_desc->max_rx_desc_count; ++i) {
766 buffer = &(rcv_desc->rx_buf_arr[i]);
767 if (buffer->state == NETXEN_BUFFER_FREE)
769 pci_unmap_single(pdev, buffer->dma,
772 if (buffer->skb != NULL)
773 dev_kfree_skb_any(buffer->skb);
775 vfree(rcv_desc->rx_buf_arr);
779 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
780 pci_disable_msi(pdev);
782 vfree(adapter->cmd_buf_arr);
784 pci_disable_device(pdev);
786 if (adapter->portnum == 0) {
787 if (init_firmware_done) {
788 dma_watchdog_shutdown_request(adapter);
791 while ((dma_watchdog_shutdown_poll_result(adapter) != 1) && i) {
792 printk(KERN_INFO "dma_watchdog_shutdown_poll still in progress\n");
798 printk(KERN_ERR "dma_watchdog_shutdown_request failed\n");
802 /* clear the register for future unloads/loads */
803 writel(0, NETXEN_CRB_NORMALIZE(adapter, NETXEN_CAM_RAM(0x1fc)));
804 printk(KERN_INFO "State: 0x%0x\n",
805 readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)));
807 /* leave the hw in the same state as reboot */
808 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));
809 if (netxen_pinit_from_rom(adapter, 0))
812 if (netxen_load_firmware(adapter))
814 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
817 /* clear the register for future unloads/loads */
818 writel(0, NETXEN_CRB_NORMALIZE(adapter, NETXEN_CAM_RAM(0x1fc)));
819 printk(KERN_INFO "State: 0x%0x\n",
820 readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)));
822 dma_watchdog_shutdown_request(adapter);
825 while ((dma_watchdog_shutdown_poll_result(adapter) != 1) && i) {
826 printk(KERN_INFO "dma_watchdog_shutdown_poll still in progress\n");
832 netxen_free_adapter_offload(adapter);
834 printk(KERN_ERR "failed to dma shutdown\n");
840 iounmap(adapter->ahw.db_base);
841 iounmap(adapter->ahw.pci_base0);
842 iounmap(adapter->ahw.pci_base1);
843 iounmap(adapter->ahw.pci_base2);
845 pci_release_regions(pdev);
846 pci_set_drvdata(pdev, NULL);
852 * Called when a network interface is made active
853 * @returns 0 on success, negative value on failure
855 static int netxen_nic_open(struct net_device *netdev)
857 struct netxen_adapter *adapter = (struct netxen_adapter *)netdev->priv;
861 if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC) {
862 err = netxen_init_firmware(adapter);
864 printk(KERN_ERR "Failed to init firmware\n");
867 netxen_nic_flash_print(adapter);
869 /* setup all the resources for the Phantom... */
870 /* this include the descriptors for rcv, tx, and status */
871 netxen_nic_clear_stats(adapter);
872 err = netxen_nic_hw_resources(adapter);
874 printk(KERN_ERR "Error in setting hw resources:%d\n",
878 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
879 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++)
880 netxen_post_rx_buffers(adapter, ctx, ring);
882 adapter->irq = adapter->ahw.pdev->irq;
883 err = request_irq(adapter->ahw.pdev->irq, netxen_intr,
884 IRQF_SHARED|IRQF_SAMPLE_RANDOM, netdev->name,
887 printk(KERN_ERR "request_irq failed with: %d\n", err);
888 netxen_free_hw_resources(adapter);
892 adapter->is_up = NETXEN_ADAPTER_UP_MAGIC;
894 if (!adapter->driver_mismatch)
895 mod_timer(&adapter->watchdog_timer, jiffies);
897 netxen_nic_enable_int(adapter);
899 /* Done here again so that even if phantom sw overwrote it,
901 if (adapter->macaddr_set)
902 adapter->macaddr_set(adapter, netdev->dev_addr);
903 if (adapter->init_port
904 && adapter->init_port(adapter, adapter->portnum) != 0) {
905 del_timer_sync(&adapter->watchdog_timer);
906 printk(KERN_ERR "%s: Failed to initialize port %d\n",
907 netxen_nic_driver_name, adapter->portnum);
911 netxen_nic_set_link_parameters(adapter);
913 netxen_nic_set_multi(netdev);
914 if (adapter->set_mtu)
915 adapter->set_mtu(adapter, netdev->mtu);
917 if (!adapter->driver_mismatch)
918 netif_start_queue(netdev);
924 * netxen_nic_close - Disables a network interface entry point
926 static int netxen_nic_close(struct net_device *netdev)
928 struct netxen_adapter *adapter = netdev_priv(netdev);
930 struct netxen_cmd_buffer *cmd_buff;
931 struct netxen_skb_frag *buffrag;
933 netif_carrier_off(netdev);
934 netif_stop_queue(netdev);
936 cmd_buff = adapter->cmd_buf_arr;
937 for (i = 0; i < adapter->max_tx_desc_count; i++) {
938 buffrag = cmd_buff->frag_array;
940 pci_unmap_single(adapter->pdev, buffrag->dma,
941 buffrag->length, PCI_DMA_TODEVICE);
944 for (j = 0; j < cmd_buff->frag_count; j++) {
947 pci_unmap_page(adapter->pdev, buffrag->dma,
953 /* Free the skb we received in netxen_nic_xmit_frame */
955 dev_kfree_skb_any(cmd_buff->skb);
956 cmd_buff->skb = NULL;
960 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) {
961 FLUSH_SCHEDULED_WORK();
962 del_timer_sync(&adapter->watchdog_timer);
968 static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
970 struct netxen_adapter *adapter = netdev_priv(netdev);
971 struct netxen_hardware_context *hw = &adapter->ahw;
972 unsigned int first_seg_len = skb->len - skb->data_len;
973 struct netxen_skb_frag *buffrag;
977 u32 saved_producer = 0;
978 struct cmd_desc_type0 *hwdesc;
980 struct netxen_cmd_buffer *pbuf = NULL;
981 static int dropped_packet = 0;
983 u32 local_producer = 0;
984 u32 max_tx_desc_count = 0;
985 u32 last_cmd_consumer = 0;
988 adapter->stats.xmitcalled++;
989 frag_count = skb_shinfo(skb)->nr_frags + 1;
991 if (unlikely(skb->len <= 0)) {
992 dev_kfree_skb_any(skb);
993 adapter->stats.badskblen++;
997 if (frag_count > MAX_BUFFERS_PER_CMD) {
998 printk("%s: %s netxen_nic_xmit_frame: frag_count (%d)"
999 "too large, can handle only %d frags\n",
1000 netxen_nic_driver_name, netdev->name,
1001 frag_count, MAX_BUFFERS_PER_CMD);
1002 adapter->stats.txdropped++;
1003 if ((++dropped_packet & 0xff) == 0xff)
1004 printk("%s: %s droppped packets = %d\n",
1005 netxen_nic_driver_name, netdev->name,
1008 return NETDEV_TX_OK;
1012 * Everything is set up. Now, we just need to transmit it out.
1013 * Note that we have to copy the contents of buffer over to
1014 * right place. Later on, this can be optimized out by de-coupling the
1015 * producer index from the buffer index.
1017 retry_getting_window:
1018 spin_lock_bh(&adapter->tx_lock);
1019 if (adapter->total_threads >= MAX_XMIT_PRODUCERS) {
1020 spin_unlock_bh(&adapter->tx_lock);
1027 for (i = 0; i < 20; i++)
1028 cpu_relax(); /*This a nop instr on i386 */
1030 goto retry_getting_window;
1032 local_producer = adapter->cmd_producer;
1033 /* There 4 fragments per descriptor */
1034 no_of_desc = (frag_count + 3) >> 2;
1035 if (netdev->features & NETIF_F_TSO) {
1036 if (skb_shinfo(skb)->gso_size > 0) {
1039 if ((ip_hdrlen(skb) + tcp_hdrlen(skb) +
1040 sizeof(struct ethhdr)) >
1041 (sizeof(struct cmd_desc_type0) - 2)) {
1046 k = adapter->cmd_producer;
1047 max_tx_desc_count = adapter->max_tx_desc_count;
1048 last_cmd_consumer = adapter->last_cmd_consumer;
1049 if ((k + no_of_desc) >=
1050 ((last_cmd_consumer <= k) ? last_cmd_consumer + max_tx_desc_count :
1051 last_cmd_consumer)) {
1052 netif_stop_queue(netdev);
1053 adapter->flags |= NETXEN_NETDEV_STATUS;
1054 spin_unlock_bh(&adapter->tx_lock);
1055 return NETDEV_TX_BUSY;
1057 k = get_index_range(k, max_tx_desc_count, no_of_desc);
1058 adapter->cmd_producer = k;
1059 adapter->total_threads++;
1060 adapter->num_threads++;
1062 spin_unlock_bh(&adapter->tx_lock);
1063 /* Copy the descriptors into the hardware */
1064 producer = local_producer;
1065 saved_producer = producer;
1066 hwdesc = &hw->cmd_desc_head[producer];
1067 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
1068 /* Take skb->data itself */
1069 pbuf = &adapter->cmd_buf_arr[producer];
1070 if ((netdev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size > 0) {
1071 pbuf->mss = skb_shinfo(skb)->gso_size;
1072 hwdesc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
1077 pbuf->total_length = skb->len;
1079 pbuf->cmd = TX_ETHER_PKT;
1080 pbuf->frag_count = frag_count;
1081 pbuf->port = adapter->portnum;
1082 buffrag = &pbuf->frag_array[0];
1083 buffrag->dma = pci_map_single(adapter->pdev, skb->data, first_seg_len,
1085 buffrag->length = first_seg_len;
1086 netxen_set_cmd_desc_totallength(hwdesc, skb->len);
1087 netxen_set_cmd_desc_num_of_buff(hwdesc, frag_count);
1088 netxen_set_cmd_desc_opcode(hwdesc, TX_ETHER_PKT);
1090 netxen_set_cmd_desc_port(hwdesc, adapter->portnum);
1091 netxen_set_cmd_desc_ctxid(hwdesc, adapter->portnum);
1092 hwdesc->buffer1_length = cpu_to_le16(first_seg_len);
1093 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
1095 for (i = 1, k = 1; i < frag_count; i++, k++) {
1096 struct skb_frag_struct *frag;
1098 unsigned long offset;
1099 dma_addr_t temp_dma;
1101 /* move to next desc. if there is a need */
1102 if ((i & 0x3) == 0) {
1104 producer = get_next_index(producer,
1105 adapter->max_tx_desc_count);
1106 hwdesc = &hw->cmd_desc_head[producer];
1107 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
1109 frag = &skb_shinfo(skb)->frags[i - 1];
1111 offset = frag->page_offset;
1114 temp_dma = pci_map_page(adapter->pdev, frag->page, offset,
1115 len, PCI_DMA_TODEVICE);
1118 buffrag->dma = temp_dma;
1119 buffrag->length = temp_len;
1121 DPRINTK(INFO, "for loop. i=%d k=%d\n", i, k);
1124 hwdesc->buffer1_length = cpu_to_le16(temp_len);
1125 hwdesc->addr_buffer1 = cpu_to_le64(temp_dma);
1128 hwdesc->buffer2_length = cpu_to_le16(temp_len);
1129 hwdesc->addr_buffer2 = cpu_to_le64(temp_dma);
1132 hwdesc->buffer3_length = cpu_to_le16(temp_len);
1133 hwdesc->addr_buffer3 = cpu_to_le64(temp_dma);
1136 hwdesc->buffer4_length = cpu_to_le16(temp_len);
1137 hwdesc->addr_buffer4 = cpu_to_le64(temp_dma);
1142 producer = get_next_index(producer, adapter->max_tx_desc_count);
1144 /* might change opcode to TX_TCP_LSO */
1145 netxen_tso_check(adapter, &hw->cmd_desc_head[saved_producer], skb);
1147 /* For LSO, we need to copy the MAC/IP/TCP headers into
1148 * the descriptor ring
1150 if (netxen_get_cmd_desc_opcode(&hw->cmd_desc_head[saved_producer])
1152 int hdr_len, first_hdr_len, more_hdr;
1153 hdr_len = hw->cmd_desc_head[saved_producer].total_hdr_length;
1154 if (hdr_len > (sizeof(struct cmd_desc_type0) - 2)) {
1155 first_hdr_len = sizeof(struct cmd_desc_type0) - 2;
1158 first_hdr_len = hdr_len;
1161 /* copy the MAC/IP/TCP headers to the cmd descriptor list */
1162 hwdesc = &hw->cmd_desc_head[producer];
1164 /* copy the first 64 bytes */
1165 memcpy(((void *)hwdesc) + 2,
1166 (void *)(skb->data), first_hdr_len);
1167 producer = get_next_index(producer, max_tx_desc_count);
1170 hwdesc = &hw->cmd_desc_head[producer];
1171 /* copy the next 64 bytes - should be enough except
1172 * for pathological case
1174 skb_copy_from_linear_data_offset(skb, first_hdr_len,
1178 producer = get_next_index(producer, max_tx_desc_count);
1182 i = netxen_get_cmd_desc_totallength(&hw->cmd_desc_head[saved_producer]);
1184 hw->cmd_desc_head[saved_producer].flags_opcode =
1185 cpu_to_le16(hw->cmd_desc_head[saved_producer].flags_opcode);
1186 hw->cmd_desc_head[saved_producer].num_of_buffers_total_length =
1187 cpu_to_le32(hw->cmd_desc_head[saved_producer].
1188 num_of_buffers_total_length);
1190 spin_lock_bh(&adapter->tx_lock);
1191 adapter->stats.txbytes += i;
1193 /* Code to update the adapter considering how many producer threads
1194 are currently working */
1195 if ((--adapter->num_threads) == 0) {
1196 /* This is the last thread */
1197 u32 crb_producer = adapter->cmd_producer;
1198 netxen_nic_update_cmd_producer(adapter, crb_producer);
1200 adapter->total_threads = 0;
1203 adapter->stats.xmitfinished++;
1204 spin_unlock_bh(&adapter->tx_lock);
1206 netdev->trans_start = jiffies;
1208 DPRINTK(INFO, "wrote CMD producer %x to phantom\n", producer);
1210 DPRINTK(INFO, "Done. Send\n");
1211 return NETDEV_TX_OK;
1214 static void netxen_watchdog(unsigned long v)
1216 struct netxen_adapter *adapter = (struct netxen_adapter *)v;
1218 SCHEDULE_WORK(&adapter->watchdog_task);
1221 static void netxen_tx_timeout(struct net_device *netdev)
1223 struct netxen_adapter *adapter = (struct netxen_adapter *)
1224 netdev_priv(netdev);
1225 SCHEDULE_WORK(&adapter->tx_timeout_task);
1228 static void netxen_tx_timeout_task(struct work_struct *work)
1230 struct netxen_adapter *adapter =
1231 container_of(work, struct netxen_adapter, tx_timeout_task);
1232 unsigned long flags;
1234 printk(KERN_ERR "%s %s: transmit timeout, resetting.\n",
1235 netxen_nic_driver_name, adapter->netdev->name);
1237 spin_lock_irqsave(&adapter->lock, flags);
1238 netxen_nic_close(adapter->netdev);
1239 netxen_nic_open(adapter->netdev);
1240 spin_unlock_irqrestore(&adapter->lock, flags);
1241 adapter->netdev->trans_start = jiffies;
1242 netif_wake_queue(adapter->netdev);
1246 netxen_handle_int(struct netxen_adapter *adapter, struct net_device *netdev)
1251 DPRINTK(INFO, "Entered handle ISR\n");
1252 adapter->stats.ints++;
1254 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
1255 our_int = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
1256 /* not our interrupt */
1257 if ((our_int & (0x80 << adapter->portnum)) == 0)
1261 netxen_nic_disable_int(adapter);
1263 if (adapter->intr_scheme == INTR_SCHEME_PERPORT) {
1264 /* claim interrupt */
1265 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
1266 writel(our_int & ~((u32)(0x80 << adapter->portnum)),
1267 NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
1271 if (netxen_nic_rx_has_work(adapter) || netxen_nic_tx_has_work(adapter)) {
1272 if (netif_rx_schedule_prep(netdev)) {
1274 * Interrupts are already disabled.
1276 __netif_rx_schedule(netdev);
1278 static unsigned int intcount = 0;
1279 if ((++intcount & 0xfff) == 0xfff)
1281 "%s: %s interrupt %d while in poll\n",
1282 netxen_nic_driver_name, netdev->name,
1289 netxen_nic_enable_int(adapter);
1296 * netxen_intr - Interrupt Handler
1297 * @irq: interrupt number
1298 * data points to adapter stucture (which may be handling more than 1 port
1300 irqreturn_t netxen_intr(int irq, void *data)
1302 struct netxen_adapter *adapter;
1303 struct net_device *netdev;
1305 if (unlikely(!irq)) {
1306 return IRQ_NONE; /* Not our interrupt */
1309 adapter = (struct netxen_adapter *)data;
1310 netdev = adapter->netdev;
1311 /* process our status queue (for all 4 ports) */
1312 if (netif_running(netdev))
1313 netxen_handle_int(adapter, netdev);
1318 static int netxen_nic_poll(struct net_device *netdev, int *budget)
1320 struct netxen_adapter *adapter = netdev_priv(netdev);
1321 int work_to_do = min(*budget, netdev->quota);
1327 DPRINTK(INFO, "polling for %d descriptors\n", *budget);
1330 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
1332 * Fairness issue. This will give undue weight to the
1333 * receive context 0.
1337 * To avoid starvation, we give each of our receivers,
1338 * a fraction of the quota. Sometimes, it might happen that we
1339 * have enough quota to process every packet, but since all the
1340 * packets are on one context, it gets only half of the quota,
1341 * and ends up not processing it.
1343 this_work_done = netxen_process_rcv_ring(adapter, ctx,
1346 work_done += this_work_done;
1349 netdev->quota -= work_done;
1350 *budget -= work_done;
1352 if (work_done >= work_to_do && netxen_nic_rx_has_work(adapter) != 0)
1355 if (netxen_process_cmd_ring((unsigned long)adapter) == 0)
1358 DPRINTK(INFO, "new work_done: %d work_to_do: %d\n",
1359 work_done, work_to_do);
1361 netif_rx_complete(netdev);
1362 netxen_nic_enable_int(adapter);
1368 #ifdef CONFIG_NET_POLL_CONTROLLER
1369 static void netxen_nic_poll_controller(struct net_device *netdev)
1371 struct netxen_adapter *adapter = netdev_priv(netdev);
1372 disable_irq(adapter->irq);
1373 netxen_intr(adapter->irq, adapter);
1374 enable_irq(adapter->irq);
1378 static struct pci_driver netxen_driver = {
1379 .name = netxen_nic_driver_name,
1380 .id_table = netxen_pci_tbl,
1381 .probe = netxen_nic_probe,
1382 .remove = __devexit_p(netxen_nic_remove)
1385 /* Driver Registration on NetXen card */
1387 static int __init netxen_init_module(void)
1389 if ((netxen_workq = create_singlethread_workqueue("netxen")) == 0)
1392 return pci_register_driver(&netxen_driver);
1395 module_init(netxen_init_module);
1397 static void __exit netxen_exit_module(void)
1400 * Wait for some time to allow the dma to drain, if any.
1403 pci_unregister_driver(&netxen_driver);
1404 destroy_workqueue(netxen_workq);
1407 module_exit(netxen_exit_module);