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 /* PCI Device ID Table */
80 static struct pci_device_id netxen_pci_tbl[] __devinitdata = {
81 {PCI_DEVICE(0x4040, 0x0001)},
82 {PCI_DEVICE(0x4040, 0x0002)},
83 {PCI_DEVICE(0x4040, 0x0003)},
84 {PCI_DEVICE(0x4040, 0x0004)},
85 {PCI_DEVICE(0x4040, 0x0005)},
86 {PCI_DEVICE(0x4040, 0x0024)},
87 {PCI_DEVICE(0x4040, 0x0025)},
91 MODULE_DEVICE_TABLE(pci, netxen_pci_tbl);
93 struct workqueue_struct *netxen_workq;
94 static void netxen_watchdog(unsigned long);
96 static inline void netxen_nic_update_cmd_producer(struct netxen_adapter *adapter,
97 uint32_t crb_producer)
99 switch (adapter->portnum) {
101 writel(crb_producer, NETXEN_CRB_NORMALIZE
102 (adapter, CRB_CMD_PRODUCER_OFFSET));
105 writel(crb_producer, NETXEN_CRB_NORMALIZE
106 (adapter, CRB_CMD_PRODUCER_OFFSET_1));
109 writel(crb_producer, NETXEN_CRB_NORMALIZE
110 (adapter, CRB_CMD_PRODUCER_OFFSET_2));
113 writel(crb_producer, NETXEN_CRB_NORMALIZE
114 (adapter, CRB_CMD_PRODUCER_OFFSET_3));
117 printk(KERN_WARNING "We tried to update "
118 "CRB_CMD_PRODUCER_OFFSET for invalid "
119 "PCI function id %d\n",
125 static inline void netxen_nic_update_cmd_consumer(struct netxen_adapter *adapter,
128 switch (adapter->portnum) {
130 writel(crb_consumer, NETXEN_CRB_NORMALIZE
131 (adapter, CRB_CMD_CONSUMER_OFFSET));
134 writel(crb_consumer, NETXEN_CRB_NORMALIZE
135 (adapter, CRB_CMD_CONSUMER_OFFSET_1));
138 writel(crb_consumer, NETXEN_CRB_NORMALIZE
139 (adapter, CRB_CMD_CONSUMER_OFFSET_2));
142 writel(crb_consumer, NETXEN_CRB_NORMALIZE
143 (adapter, CRB_CMD_CONSUMER_OFFSET_3));
146 printk(KERN_WARNING "We tried to update "
147 "CRB_CMD_PRODUCER_OFFSET for invalid "
148 "PCI function id %d\n",
154 #define ADAPTER_LIST_SIZE 12
155 int netxen_cards_found;
160 * The Linux system will invoke this after identifying the vendor ID and
161 * device Id in the pci_tbl supported by this module.
163 * A quad port card has one operational PCI config space, (function 0),
164 * which is used to access all four ports.
166 * This routine will initialize the adapter, and setup the global parameters
167 * along with the port's specific structure.
170 netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
172 struct net_device *netdev = NULL;
173 struct netxen_adapter *adapter = NULL;
174 void __iomem *mem_ptr0 = NULL;
175 void __iomem *mem_ptr1 = NULL;
176 void __iomem *mem_ptr2 = NULL;
178 u8 __iomem *db_ptr = NULL;
179 unsigned long mem_base, mem_len, db_base, db_len;
180 int pci_using_dac, i = 0, err;
182 struct netxen_recv_context *recv_ctx = NULL;
183 struct netxen_rcv_desc_ctx *rcv_desc = NULL;
184 struct netxen_cmd_buffer *cmd_buf_arr = NULL;
185 u64 mac_addr[FLASH_NUM_PORTS + 1];
186 static int valid_mac = 0;
187 static int netxen_probe_flag;
188 int pci_func_id = PCI_FUNC(pdev->devfn);
190 printk(KERN_INFO "%s \n", netxen_nic_driver_string);
191 if (pdev->class != 0x020000) {
192 printk(KERN_ERR"NetXen function %d, class %x will not"
193 "be enabled.\n",pci_func_id, pdev->class);
196 if ((err = pci_enable_device(pdev)))
198 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
200 goto err_out_disable_pdev;
203 if ((err = pci_request_regions(pdev, netxen_nic_driver_name)))
204 goto err_out_disable_pdev;
206 pci_set_master(pdev);
207 pci_read_config_byte(pdev, PCI_REVISION_ID, &nx_p2_id);
208 if (nx_p2_id == NX_P2_C1 &&
209 (pci_set_dma_mask(pdev, DMA_35BIT_MASK) == 0) &&
210 (pci_set_consistent_dma_mask(pdev, DMA_35BIT_MASK) == 0)) {
213 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) ||
214 (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK)))
215 goto err_out_free_res;
221 netdev = alloc_etherdev(sizeof(struct netxen_adapter));
223 printk(KERN_ERR"%s: Failed to allocate memory for the "
224 "device block.Check system memory resource"
225 " usage.\n", netxen_nic_driver_name);
226 goto err_out_free_res;
229 SET_MODULE_OWNER(netdev);
230 SET_NETDEV_DEV(netdev, &pdev->dev);
232 adapter = netdev->priv;
233 memset(adapter, 0 , sizeof(struct netxen_adapter));
235 adapter->ahw.pdev = pdev;
236 adapter->ahw.pci_func = pci_func_id;
238 /* remap phys address */
239 mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */
240 mem_len = pci_resource_len(pdev, 0);
242 /* 128 Meg of memory */
243 mem_ptr0 = ioremap(mem_base, FIRST_PAGE_GROUP_SIZE);
245 ioremap(mem_base + SECOND_PAGE_GROUP_START, SECOND_PAGE_GROUP_SIZE);
247 ioremap(mem_base + THIRD_PAGE_GROUP_START, THIRD_PAGE_GROUP_SIZE);
249 if ((mem_ptr0 == 0UL) || (mem_ptr1 == 0UL) || (mem_ptr2 == 0UL)) {
251 "Cannot remap adapter memory aborting.:"
252 "0 -> %p, 1 -> %p, 2 -> %p\n",
253 mem_ptr0, mem_ptr1, mem_ptr2);
256 goto err_out_iounmap;
258 db_base = pci_resource_start(pdev, 4); /* doorbell is on bar 4 */
259 db_len = pci_resource_len(pdev, 4);
262 printk(KERN_ERR "%s: doorbell is disabled\n",
263 netxen_nic_driver_name);
265 goto err_out_iounmap;
267 DPRINTK(INFO, "doorbell ioremap from %lx a size of %lx\n", db_base,
270 db_ptr = ioremap(db_base, NETXEN_DB_MAPSIZE_BYTES);
272 printk(KERN_ERR "%s: Failed to allocate doorbell map.",
273 netxen_nic_driver_name);
275 goto err_out_iounmap;
277 DPRINTK(INFO, "doorbell ioremaped at %p\n", db_ptr);
279 adapter->max_tx_desc_count = MAX_CMD_DESCRIPTORS;
280 if ((adapter->ahw.boardcfg.board_type == NETXEN_BRDTYPE_P2_SB35_4G) ||
281 (adapter->ahw.boardcfg.board_type ==
282 NETXEN_BRDTYPE_P2_SB31_2G))
283 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_1G;
285 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS;
286 adapter->max_jumbo_rx_desc_count = MAX_JUMBO_RCV_DESCRIPTORS;
287 adapter->max_lro_rx_desc_count = MAX_LRO_RCV_DESCRIPTORS;
289 pci_set_drvdata(pdev, adapter);
291 adapter->netdev = netdev;
292 adapter->pdev = pdev;
293 adapter->portnum = pci_func_id;
295 netdev->open = netxen_nic_open;
296 netdev->stop = netxen_nic_close;
297 netdev->hard_start_xmit = netxen_nic_xmit_frame;
298 netdev->set_multicast_list = netxen_nic_set_multi;
299 netdev->set_mac_address = netxen_nic_set_mac;
300 netdev->change_mtu = netxen_nic_change_mtu;
301 netdev->tx_timeout = netxen_tx_timeout;
302 netdev->watchdog_timeo = HZ;
304 netxen_nic_change_mtu(netdev, netdev->mtu);
306 SET_ETHTOOL_OPS(netdev, &netxen_nic_ethtool_ops);
307 netdev->poll = netxen_nic_poll;
308 netdev->weight = NETXEN_NETDEV_WEIGHT;
309 #ifdef CONFIG_NET_POLL_CONTROLLER
310 netdev->poll_controller = netxen_nic_poll_controller;
312 /* ScatterGather support */
313 netdev->features = NETIF_F_SG;
314 netdev->features |= NETIF_F_IP_CSUM;
315 netdev->features |= NETIF_F_TSO;
318 netdev->features |= NETIF_F_HIGHDMA;
320 if (pci_enable_msi(pdev)) {
321 adapter->flags &= ~NETXEN_NIC_MSI_ENABLED;
322 printk(KERN_WARNING "%s: unable to allocate MSI interrupt"
323 " error\n", netxen_nic_driver_name);
325 adapter->flags |= NETXEN_NIC_MSI_ENABLED;
327 cmd_buf_arr = (struct netxen_cmd_buffer *)vmalloc(TX_RINGSIZE);
328 if (cmd_buf_arr == NULL) {
330 "%s: Could not allocate cmd_buf_arr memory:%d\n",
331 netxen_nic_driver_name, (int)TX_RINGSIZE);
333 goto err_out_free_adapter;
335 memset(cmd_buf_arr, 0, TX_RINGSIZE);
337 for (i = 0; i < MAX_RCV_CTX; ++i) {
338 recv_ctx = &adapter->recv_ctx[i];
339 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
340 rcv_desc = &recv_ctx->rcv_desc[ring];
341 switch (RCV_DESC_TYPE(ring)) {
342 case RCV_DESC_NORMAL:
343 rcv_desc->max_rx_desc_count =
344 adapter->max_rx_desc_count;
345 rcv_desc->flags = RCV_DESC_NORMAL;
346 rcv_desc->dma_size = RX_DMA_MAP_LEN;
347 rcv_desc->skb_size = MAX_RX_BUFFER_LENGTH;
351 rcv_desc->max_rx_desc_count =
352 adapter->max_jumbo_rx_desc_count;
353 rcv_desc->flags = RCV_DESC_JUMBO;
354 rcv_desc->dma_size = RX_JUMBO_DMA_MAP_LEN;
355 rcv_desc->skb_size = MAX_RX_JUMBO_BUFFER_LENGTH;
359 rcv_desc->max_rx_desc_count =
360 adapter->max_lro_rx_desc_count;
361 rcv_desc->flags = RCV_DESC_LRO;
362 rcv_desc->dma_size = RX_LRO_DMA_MAP_LEN;
363 rcv_desc->skb_size = MAX_RX_LRO_BUFFER_LENGTH;
367 rcv_desc->rx_buf_arr = (struct netxen_rx_buffer *)
368 vmalloc(RCV_BUFFSIZE);
370 if (rcv_desc->rx_buf_arr == NULL) {
371 printk(KERN_ERR "%s: Could not allocate"
372 "rcv_desc->rx_buf_arr memory:%d\n",
373 netxen_nic_driver_name,
376 goto err_out_free_rx_buffer;
378 memset(rcv_desc->rx_buf_arr, 0, RCV_BUFFSIZE);
383 adapter->cmd_buf_arr = cmd_buf_arr;
384 adapter->ahw.pci_base0 = mem_ptr0;
385 adapter->ahw.pci_base1 = mem_ptr1;
386 adapter->ahw.pci_base2 = mem_ptr2;
387 adapter->ahw.db_base = db_ptr;
388 adapter->ahw.db_len = db_len;
389 spin_lock_init(&adapter->tx_lock);
390 spin_lock_init(&adapter->lock);
391 netxen_initialize_adapter_sw(adapter); /* initialize the buffers in adapter */
392 /* Mezz cards have PCI function 0,2,3 enabled */
393 if (adapter->ahw.boardcfg.board_type == NETXEN_BRDTYPE_P2_SB31_10G_IMEZ)
394 if (pci_func_id >= 2)
395 adapter->portnum = pci_func_id - 2;
398 if(adapter->portnum == 0) {
399 netxen_pinit_from_rom(adapter, 0);
401 netxen_load_firmware(adapter);
406 * Set the CRB window to invalid. If any register in window 0 is
407 * accessed it should set the window to 0 and then reset it to 1.
409 adapter->curr_window = 255;
411 * Adapter in our case is quad port so initialize it before
412 * initializing the ports
415 /* initialize the adapter */
416 netxen_initialize_adapter_hw(adapter);
418 netxen_initialize_adapter_ops(adapter);
420 init_timer(&adapter->watchdog_timer);
421 adapter->ahw.xg_linkup = 0;
422 adapter->watchdog_timer.function = &netxen_watchdog;
423 adapter->watchdog_timer.data = (unsigned long)adapter;
424 INIT_WORK(&adapter->watchdog_task, netxen_watchdog_task);
425 adapter->ahw.pdev = pdev;
426 adapter->proc_cmd_buf_counter = 0;
427 adapter->ahw.revision_id = nx_p2_id;
429 netxen_nic_update_cmd_producer(adapter, 0);
430 netxen_nic_update_cmd_consumer(adapter, 0);
432 if (netxen_is_flash_supported(adapter) == 0 &&
433 netxen_get_flash_mac_addr(adapter, mac_addr) == 0)
439 unsigned char *p = (unsigned char *)&mac_addr[adapter->portnum];
440 netdev->dev_addr[0] = *(p + 5);
441 netdev->dev_addr[1] = *(p + 4);
442 netdev->dev_addr[2] = *(p + 3);
443 netdev->dev_addr[3] = *(p + 2);
444 netdev->dev_addr[4] = *(p + 1);
445 netdev->dev_addr[5] = *(p + 0);
447 memcpy(netdev->perm_addr, netdev->dev_addr,
449 if (!is_valid_ether_addr(netdev->perm_addr)) {
450 printk(KERN_ERR "%s: Bad MAC address "
451 "%02x:%02x:%02x:%02x:%02x:%02x.\n",
452 netxen_nic_driver_name,
458 netdev->dev_addr[5]);
460 if (adapter->macaddr_set)
461 adapter->macaddr_set(adapter,
467 * Initialize all the CRB registers here.
469 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMD_PRODUCER_OFFSET));
470 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMD_CONSUMER_OFFSET));
471 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_HOST_CMD_ADDR_LO));
473 /* do this before waking up pegs so that we have valid dummy dma addr */
474 if (adapter->portnum == 0)
475 err = netxen_initialize_adapter_offload(adapter);
477 goto err_out_free_dev;
479 if (netxen_probe_flag == 0) {
480 /* Unlock the HW, prompting the boot sequence */
482 NETXEN_CRB_NORMALIZE(adapter,
483 NETXEN_ROMUSB_GLB_PEGTUNE_DONE));
484 /* Handshake with the card before we register the devices. */
485 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
488 if(netxen_probe_flag == 0) {
489 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));
490 netxen_pinit_from_rom(adapter, 0);
492 netxen_load_firmware(adapter);
493 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
496 * delay a while to ensure that the Pegs are up & running.
497 * Otherwise, we might see some flaky behaviour.
500 INIT_WORK(&adapter->tx_timeout_task, netxen_tx_timeout_task);
501 netxen_nic_erase_pxe(adapter);
502 netif_carrier_off(netdev);
503 netif_stop_queue(netdev);
505 if((err = register_netdev(netdev)))
506 DPRINTK(1, ERR, "register_netdev failed port #%d"
509 switch (adapter->ahw.board_type) {
511 printk(KERN_INFO "%s: QUAD GbE board initialized\n",
512 netxen_nic_driver_name);
515 case NETXEN_NIC_XGBE:
516 printk(KERN_INFO "%s: XGbE board initialized\n",
517 netxen_nic_driver_name);
521 adapter->driver_mismatch = 0;
522 if(netxen_probe_flag == 0)
523 netxen_probe_flag ++;
528 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
529 pci_disable_msi(pdev);
531 unregister_netdev(adapter->netdev);
532 free_netdev(adapter->netdev);
534 netxen_free_adapter_offload(adapter);
536 err_out_free_rx_buffer:
537 for (i = 0; i < MAX_RCV_CTX; ++i) {
538 recv_ctx = &adapter->recv_ctx[i];
539 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
540 rcv_desc = &recv_ctx->rcv_desc[ring];
541 if (rcv_desc->rx_buf_arr != NULL) {
542 vfree(rcv_desc->rx_buf_arr);
543 rcv_desc->rx_buf_arr = NULL;
549 err_out_free_adapter:
550 pci_set_drvdata(pdev, NULL);
565 pci_release_regions(pdev);
566 err_out_disable_pdev:
567 pci_disable_device(pdev);
571 static void __devexit netxen_nic_remove(struct pci_dev *pdev)
573 struct netxen_adapter *adapter;
574 struct net_device *netdev;
575 struct netxen_rx_buffer *buffer;
576 struct netxen_recv_context *recv_ctx;
577 struct netxen_rcv_desc_ctx *rcv_desc;
581 adapter = pci_get_drvdata(pdev);
582 netdev = adapter->netdev;
586 if (adapter->stop_port)
587 adapter->stop_port(adapter);
590 free_irq(adapter->irq, adapter);
591 /* leave the hw in the same state as reboot */
592 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));
593 netxen_pinit_from_rom(adapter, 0);
594 netxen_load_firmware(adapter);
595 netxen_free_adapter_offload(adapter);
598 unregister_netdev(netdev);
601 if ((adapter->flags & NETXEN_NIC_MSI_ENABLED))
602 pci_disable_msi(pdev);
603 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC)
604 netxen_free_hw_resources(adapter);
606 iounmap(adapter->ahw.db_base);
607 iounmap(adapter->ahw.pci_base0);
608 iounmap(adapter->ahw.pci_base1);
609 iounmap(adapter->ahw.pci_base2);
611 pci_release_regions(pdev);
612 pci_disable_device(pdev);
613 pci_set_drvdata(pdev, NULL);
615 for (ctxid = 0; ctxid < MAX_RCV_CTX; ++ctxid) {
616 recv_ctx = &adapter->recv_ctx[ctxid];
617 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
618 rcv_desc = &recv_ctx->rcv_desc[ring];
619 for (i = 0; i < rcv_desc->max_rx_desc_count; ++i) {
620 buffer = &(rcv_desc->rx_buf_arr[i]);
621 if (buffer->state == NETXEN_BUFFER_FREE)
623 pci_unmap_single(pdev, buffer->dma,
626 if (buffer->skb != NULL)
627 dev_kfree_skb_any(buffer->skb);
629 vfree(rcv_desc->rx_buf_arr);
633 vfree(adapter->cmd_buf_arr);
638 * Called when a network interface is made active
639 * @returns 0 on success, negative value on failure
641 static int netxen_nic_open(struct net_device *netdev)
643 struct netxen_adapter *adapter = (struct netxen_adapter *)netdev->priv;
647 if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC) {
648 err = netxen_init_firmware(adapter);
650 printk(KERN_ERR "Failed to init firmware\n");
653 netxen_nic_flash_print(adapter);
654 if (adapter->init_niu)
655 adapter->init_niu(adapter);
657 /* setup all the resources for the Phantom... */
658 /* this include the descriptors for rcv, tx, and status */
659 netxen_nic_clear_stats(adapter);
660 err = netxen_nic_hw_resources(adapter);
662 printk(KERN_ERR "Error in setting hw resources:%d\n",
666 if (adapter->init_port
667 && adapter->init_port(adapter, adapter->portnum) != 0) {
668 printk(KERN_ERR "%s: Failed to initialize port %d\n",
669 netxen_nic_driver_name, adapter->portnum);
670 netxen_free_hw_resources(adapter);
673 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
674 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++)
675 netxen_post_rx_buffers(adapter, ctx, ring);
677 adapter->irq = adapter->ahw.pdev->irq;
678 err = request_irq(adapter->ahw.pdev->irq, &netxen_intr,
679 IRQF_SHARED | IRQF_SAMPLE_RANDOM,
680 netdev->name, adapter);
682 printk(KERN_ERR "request_irq failed with: %d\n", err);
683 netxen_free_hw_resources(adapter);
687 adapter->is_up = NETXEN_ADAPTER_UP_MAGIC;
689 if (!adapter->driver_mismatch)
690 mod_timer(&adapter->watchdog_timer, jiffies);
692 netxen_nic_enable_int(adapter);
694 /* Done here again so that even if phantom sw overwrote it,
696 if (adapter->macaddr_set)
697 adapter->macaddr_set(adapter, netdev->dev_addr);
698 netxen_nic_set_link_parameters(adapter);
700 netxen_nic_set_multi(netdev);
701 if (adapter->set_mtu)
702 adapter->set_mtu(adapter, netdev->mtu);
704 if (!adapter->driver_mismatch)
705 netif_start_queue(netdev);
711 * netxen_nic_close - Disables a network interface entry point
713 static int netxen_nic_close(struct net_device *netdev)
715 struct netxen_adapter *adapter = netdev_priv(netdev);
717 struct netxen_cmd_buffer *cmd_buff;
718 struct netxen_skb_frag *buffrag;
720 netif_carrier_off(netdev);
721 netif_stop_queue(netdev);
723 netxen_nic_disable_int(adapter);
725 free_irq(adapter->irq, adapter);
727 cmd_buff = adapter->cmd_buf_arr;
728 for (i = 0; i < adapter->max_tx_desc_count; i++) {
729 buffrag = cmd_buff->frag_array;
731 pci_unmap_single(adapter->pdev, buffrag->dma,
732 buffrag->length, PCI_DMA_TODEVICE);
733 buffrag->dma = (u64) NULL;
735 for (j = 0; j < cmd_buff->frag_count; j++) {
738 pci_unmap_page(adapter->pdev, buffrag->dma,
741 buffrag->dma = (u64) NULL;
744 /* Free the skb we received in netxen_nic_xmit_frame */
746 dev_kfree_skb_any(cmd_buff->skb);
747 cmd_buff->skb = NULL;
751 FLUSH_SCHEDULED_WORK();
752 del_timer_sync(&adapter->watchdog_timer);
757 static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
759 struct netxen_adapter *adapter = netdev_priv(netdev);
760 struct netxen_hardware_context *hw = &adapter->ahw;
761 unsigned int first_seg_len = skb->len - skb->data_len;
762 struct netxen_skb_frag *buffrag;
766 u32 saved_producer = 0;
767 struct cmd_desc_type0 *hwdesc;
769 struct netxen_cmd_buffer *pbuf = NULL;
770 static int dropped_packet = 0;
772 u32 local_producer = 0;
773 u32 max_tx_desc_count = 0;
774 u32 last_cmd_consumer = 0;
777 adapter->stats.xmitcalled++;
778 frag_count = skb_shinfo(skb)->nr_frags + 1;
780 if (unlikely(skb->len <= 0)) {
781 dev_kfree_skb_any(skb);
782 adapter->stats.badskblen++;
786 if (frag_count > MAX_BUFFERS_PER_CMD) {
787 printk("%s: %s netxen_nic_xmit_frame: frag_count (%d)"
788 "too large, can handle only %d frags\n",
789 netxen_nic_driver_name, netdev->name,
790 frag_count, MAX_BUFFERS_PER_CMD);
791 adapter->stats.txdropped++;
792 if ((++dropped_packet & 0xff) == 0xff)
793 printk("%s: %s droppped packets = %d\n",
794 netxen_nic_driver_name, netdev->name,
801 * Everything is set up. Now, we just need to transmit it out.
802 * Note that we have to copy the contents of buffer over to
803 * right place. Later on, this can be optimized out by de-coupling the
804 * producer index from the buffer index.
806 retry_getting_window:
807 spin_lock_bh(&adapter->tx_lock);
808 if (adapter->total_threads >= MAX_XMIT_PRODUCERS) {
809 spin_unlock_bh(&adapter->tx_lock);
816 for (i = 0; i < 20; i++)
817 cpu_relax(); /*This a nop instr on i386 */
819 goto retry_getting_window;
821 local_producer = adapter->cmd_producer;
822 /* There 4 fragments per descriptor */
823 no_of_desc = (frag_count + 3) >> 2;
824 if (netdev->features & NETIF_F_TSO) {
825 if (skb_shinfo(skb)->gso_size > 0) {
828 if ((ip_hdrlen(skb) + tcp_hdrlen(skb) +
829 sizeof(struct ethhdr)) >
830 (sizeof(struct cmd_desc_type0) - 2)) {
835 k = adapter->cmd_producer;
836 max_tx_desc_count = adapter->max_tx_desc_count;
837 last_cmd_consumer = adapter->last_cmd_consumer;
838 if ((k + no_of_desc) >=
839 ((last_cmd_consumer <= k) ? last_cmd_consumer + max_tx_desc_count :
840 last_cmd_consumer)) {
841 netif_stop_queue(netdev);
842 adapter->flags |= NETXEN_NETDEV_STATUS;
843 spin_unlock_bh(&adapter->tx_lock);
844 return NETDEV_TX_BUSY;
846 k = get_index_range(k, max_tx_desc_count, no_of_desc);
847 adapter->cmd_producer = k;
848 adapter->total_threads++;
849 adapter->num_threads++;
851 spin_unlock_bh(&adapter->tx_lock);
852 /* Copy the descriptors into the hardware */
853 producer = local_producer;
854 saved_producer = producer;
855 hwdesc = &hw->cmd_desc_head[producer];
856 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
857 /* Take skb->data itself */
858 pbuf = &adapter->cmd_buf_arr[producer];
859 if ((netdev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size > 0) {
860 pbuf->mss = skb_shinfo(skb)->gso_size;
861 hwdesc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
866 pbuf->total_length = skb->len;
868 pbuf->cmd = TX_ETHER_PKT;
869 pbuf->frag_count = frag_count;
870 pbuf->port = adapter->portnum;
871 buffrag = &pbuf->frag_array[0];
872 buffrag->dma = pci_map_single(adapter->pdev, skb->data, first_seg_len,
874 buffrag->length = first_seg_len;
875 netxen_set_cmd_desc_totallength(hwdesc, skb->len);
876 netxen_set_cmd_desc_num_of_buff(hwdesc, frag_count);
877 netxen_set_cmd_desc_opcode(hwdesc, TX_ETHER_PKT);
879 netxen_set_cmd_desc_port(hwdesc, adapter->portnum);
880 hwdesc->buffer1_length = cpu_to_le16(first_seg_len);
881 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
883 for (i = 1, k = 1; i < frag_count; i++, k++) {
884 struct skb_frag_struct *frag;
886 unsigned long offset;
889 /* move to next desc. if there is a need */
890 if ((i & 0x3) == 0) {
892 producer = get_next_index(producer,
893 adapter->max_tx_desc_count);
894 hwdesc = &hw->cmd_desc_head[producer];
895 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
897 frag = &skb_shinfo(skb)->frags[i - 1];
899 offset = frag->page_offset;
902 temp_dma = pci_map_page(adapter->pdev, frag->page, offset,
903 len, PCI_DMA_TODEVICE);
906 buffrag->dma = temp_dma;
907 buffrag->length = temp_len;
909 DPRINTK(INFO, "for loop. i=%d k=%d\n", i, k);
912 hwdesc->buffer1_length = cpu_to_le16(temp_len);
913 hwdesc->addr_buffer1 = cpu_to_le64(temp_dma);
916 hwdesc->buffer2_length = cpu_to_le16(temp_len);
917 hwdesc->addr_buffer2 = cpu_to_le64(temp_dma);
920 hwdesc->buffer3_length = cpu_to_le16(temp_len);
921 hwdesc->addr_buffer3 = cpu_to_le64(temp_dma);
924 hwdesc->buffer4_length = cpu_to_le16(temp_len);
925 hwdesc->addr_buffer4 = cpu_to_le64(temp_dma);
930 producer = get_next_index(producer, adapter->max_tx_desc_count);
932 /* might change opcode to TX_TCP_LSO */
933 netxen_tso_check(adapter, &hw->cmd_desc_head[saved_producer], skb);
935 /* For LSO, we need to copy the MAC/IP/TCP headers into
936 * the descriptor ring
938 if (netxen_get_cmd_desc_opcode(&hw->cmd_desc_head[saved_producer])
940 int hdr_len, first_hdr_len, more_hdr;
941 hdr_len = hw->cmd_desc_head[saved_producer].total_hdr_length;
942 if (hdr_len > (sizeof(struct cmd_desc_type0) - 2)) {
943 first_hdr_len = sizeof(struct cmd_desc_type0) - 2;
946 first_hdr_len = hdr_len;
949 /* copy the MAC/IP/TCP headers to the cmd descriptor list */
950 hwdesc = &hw->cmd_desc_head[producer];
952 /* copy the first 64 bytes */
953 memcpy(((void *)hwdesc) + 2,
954 (void *)(skb->data), first_hdr_len);
955 producer = get_next_index(producer, max_tx_desc_count);
958 hwdesc = &hw->cmd_desc_head[producer];
959 /* copy the next 64 bytes - should be enough except
960 * for pathological case
962 skb_copy_from_linear_data_offset(skb, first_hdr_len,
966 producer = get_next_index(producer, max_tx_desc_count);
969 spin_lock_bh(&adapter->tx_lock);
970 adapter->stats.txbytes +=
971 netxen_get_cmd_desc_totallength(&hw->cmd_desc_head[saved_producer]);
972 /* Code to update the adapter considering how many producer threads
973 are currently working */
974 if ((--adapter->num_threads) == 0) {
975 /* This is the last thread */
976 u32 crb_producer = adapter->cmd_producer;
977 netxen_nic_update_cmd_producer(adapter, crb_producer);
979 adapter->total_threads = 0;
982 adapter->stats.xmitfinished++;
983 spin_unlock_bh(&adapter->tx_lock);
985 netdev->trans_start = jiffies;
987 DPRINTK(INFO, "wrote CMD producer %x to phantom\n", producer);
989 DPRINTK(INFO, "Done. Send\n");
993 static void netxen_watchdog(unsigned long v)
995 struct netxen_adapter *adapter = (struct netxen_adapter *)v;
997 SCHEDULE_WORK(&adapter->watchdog_task);
1000 static void netxen_tx_timeout(struct net_device *netdev)
1002 struct netxen_adapter *adapter = (struct netxen_adapter *)
1003 netdev_priv(netdev);
1004 SCHEDULE_WORK(&adapter->tx_timeout_task);
1007 static void netxen_tx_timeout_task(struct work_struct *work)
1009 struct netxen_adapter *adapter =
1010 container_of(work, struct netxen_adapter, tx_timeout_task);
1011 struct net_device *netdev = adapter->netdev;
1012 unsigned long flags;
1014 printk(KERN_ERR "%s %s: transmit timeout, resetting.\n",
1015 netxen_nic_driver_name, netdev->name);
1017 spin_lock_irqsave(&adapter->lock, flags);
1018 netxen_nic_close(netdev);
1019 netxen_nic_open(netdev);
1020 spin_unlock_irqrestore(&adapter->lock, flags);
1021 netdev->trans_start = jiffies;
1022 netif_wake_queue(netdev);
1026 netxen_handle_int(struct netxen_adapter *adapter, struct net_device *netdev)
1030 DPRINTK(INFO, "Entered handle ISR\n");
1032 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
1036 our_int = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
1037 /* not our interrupt */
1038 if ((our_int & (0x80 << adapter->portnum)) == 0)
1040 netxen_nic_disable_int(adapter);
1041 /* Window = 0 or 1 */
1043 writel(0xffffffff, PCI_OFFSET_SECOND_RANGE(adapter,
1044 ISR_INT_TARGET_STATUS));
1045 mask = readl(pci_base_offset(adapter, ISR_INT_VECTOR));
1046 } while (((mask & 0x80) != 0) && (++count < 32));
1047 if ((mask & 0x80) != 0)
1048 printk("Could not disable interrupt completely\n");
1052 if (netxen_nic_rx_has_work(adapter) || netxen_nic_tx_has_work(adapter)) {
1053 if (netif_rx_schedule_prep(netdev)) {
1055 * Interrupts are already disabled.
1057 __netif_rx_schedule(netdev);
1059 static unsigned int intcount = 0;
1060 if ((++intcount & 0xfff) == 0xfff)
1062 "%s: %s interrupt %d while in poll\n",
1063 netxen_nic_driver_name, netdev->name,
1070 netxen_nic_enable_int(adapter);
1077 * netxen_intr - Interrupt Handler
1078 * @irq: interrupt number
1079 * data points to adapter stucture (which may be handling more than 1 port
1081 irqreturn_t netxen_intr(int irq, void *data)
1083 struct netxen_adapter *adapter;
1084 struct net_device *netdev;
1086 if (unlikely(!irq)) {
1087 return IRQ_NONE; /* Not our interrupt */
1090 adapter = (struct netxen_adapter *)data;
1091 netdev = adapter->netdev;
1092 /* process our status queue (for all 4 ports) */
1093 if (netif_running(netdev))
1094 netxen_handle_int(adapter, netdev);
1099 static int netxen_nic_poll(struct net_device *netdev, int *budget)
1101 struct netxen_adapter *adapter = netdev_priv(netdev);
1102 int work_to_do = min(*budget, netdev->quota);
1108 DPRINTK(INFO, "polling for %d descriptors\n", *budget);
1111 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
1113 * Fairness issue. This will give undue weight to the
1114 * receive context 0.
1118 * To avoid starvation, we give each of our receivers,
1119 * a fraction of the quota. Sometimes, it might happen that we
1120 * have enough quota to process every packet, but since all the
1121 * packets are on one context, it gets only half of the quota,
1122 * and ends up not processing it.
1124 this_work_done = netxen_process_rcv_ring(adapter, ctx,
1127 work_done += this_work_done;
1130 netdev->quota -= work_done;
1131 *budget -= work_done;
1133 if (work_done >= work_to_do && netxen_nic_rx_has_work(adapter) != 0)
1136 if (netxen_process_cmd_ring((unsigned long)adapter) == 0)
1139 DPRINTK(INFO, "new work_done: %d work_to_do: %d\n",
1140 work_done, work_to_do);
1142 netif_rx_complete(netdev);
1143 netxen_nic_enable_int(adapter);
1149 #ifdef CONFIG_NET_POLL_CONTROLLER
1150 static void netxen_nic_poll_controller(struct net_device *netdev)
1152 struct netxen_adapter *adapter = netdev_priv(netdev);
1153 disable_irq(adapter->irq);
1154 netxen_intr(adapter->irq, adapter);
1155 enable_irq(adapter->irq);
1159 static struct pci_driver netxen_driver = {
1160 .name = netxen_nic_driver_name,
1161 .id_table = netxen_pci_tbl,
1162 .probe = netxen_nic_probe,
1163 .remove = __devexit_p(netxen_nic_remove)
1166 /* Driver Registration on NetXen card */
1168 static int __init netxen_init_module(void)
1170 if ((netxen_workq = create_singlethread_workqueue("netxen")) == 0)
1173 return pci_register_driver(&netxen_driver);
1176 module_init(netxen_init_module);
1178 static void __exit netxen_exit_module(void)
1181 * Wait for some time to allow the dma to drain, if any.
1183 pci_unregister_driver(&netxen_driver);
1184 destroy_workqueue(netxen_workq);
1187 module_exit(netxen_exit_module);