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 #define DEFINE_GLOBAL_RECV_CRB
40 #include "netxen_nic_phan_reg.h"
41 #include "netxen_nic_ioctl.h"
43 #include <linux/dma-mapping.h>
44 #include <linux/vmalloc.h>
46 #define PHAN_VENDOR_ID 0x4040
48 MODULE_DESCRIPTION("NetXen Multi port (1/10) Gigabit Network Driver");
49 MODULE_LICENSE("GPL");
50 MODULE_VERSION(NETXEN_NIC_LINUX_VERSIONID);
52 char netxen_nic_driver_name[] = "netxen-nic";
53 static char netxen_nic_driver_string[] = "NetXen Network Driver version "
54 NETXEN_NIC_LINUX_VERSIONID;
56 struct netxen_adapter *g_adapter = NULL;
58 #define NETXEN_NETDEV_WEIGHT 120
59 #define NETXEN_ADAPTER_UP_MAGIC 777
60 #define NETXEN_NIC_PEG_TUNE 0
62 u8 nx_p2_id = NX_P2_C0;
64 #define DMA_32BIT_MASK 0x00000000ffffffffULL
65 #define DMA_35BIT_MASK 0x00000007ffffffffULL
67 /* Local functions to NetXen NIC driver */
68 static int __devinit netxen_nic_probe(struct pci_dev *pdev,
69 const struct pci_device_id *ent);
70 static void __devexit netxen_nic_remove(struct pci_dev *pdev);
71 static int netxen_nic_open(struct net_device *netdev);
72 static int netxen_nic_close(struct net_device *netdev);
73 static int netxen_nic_xmit_frame(struct sk_buff *, struct net_device *);
74 static void netxen_tx_timeout(struct net_device *netdev);
75 static void netxen_tx_timeout_task(struct work_struct *work);
76 static void netxen_watchdog(unsigned long);
77 static int netxen_handle_int(struct netxen_adapter *, struct net_device *);
78 static int netxen_nic_ioctl(struct net_device *netdev,
79 struct ifreq *ifr, int cmd);
80 static int netxen_nic_poll(struct net_device *dev, int *budget);
81 #ifdef CONFIG_NET_POLL_CONTROLLER
82 static void netxen_nic_poll_controller(struct net_device *netdev);
84 static irqreturn_t netxen_intr(int irq, void *data);
86 /* PCI Device ID Table */
87 static struct pci_device_id netxen_pci_tbl[] __devinitdata = {
88 {PCI_DEVICE(0x4040, 0x0001)},
89 {PCI_DEVICE(0x4040, 0x0002)},
90 {PCI_DEVICE(0x4040, 0x0003)},
91 {PCI_DEVICE(0x4040, 0x0004)},
92 {PCI_DEVICE(0x4040, 0x0005)},
93 {PCI_DEVICE(0x4040, 0x0024)},
94 {PCI_DEVICE(0x4040, 0x0025)},
98 MODULE_DEVICE_TABLE(pci, netxen_pci_tbl);
100 struct workqueue_struct *netxen_workq;
101 static void netxen_watchdog(unsigned long);
106 * The Linux system will invoke this after identifying the vendor ID and
107 * device Id in the pci_tbl supported by this module.
109 * A quad port card has one operational PCI config space, (function 0),
110 * which is used to access all four ports.
112 * This routine will initialize the adapter, and setup the global parameters
113 * along with the port's specific structure.
116 netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
118 struct net_device *netdev = NULL;
119 struct netxen_adapter *adapter = NULL;
120 struct netxen_port *port = NULL;
121 void __iomem *mem_ptr0 = NULL;
122 void __iomem *mem_ptr1 = NULL;
123 void __iomem *mem_ptr2 = NULL;
126 unsigned long mem_base, mem_len, db_base, db_len;
127 int pci_using_dac, i, err;
129 struct netxen_recv_context *recv_ctx = NULL;
130 struct netxen_rcv_desc_ctx *rcv_desc = NULL;
131 struct netxen_cmd_buffer *cmd_buf_arr = NULL;
132 u64 mac_addr[FLASH_NUM_PORTS + 1];
134 static int netxen_cards_found = 0;
136 printk(KERN_INFO "%s \n", netxen_nic_driver_string);
137 /* In current scheme, we use only PCI function 0 */
138 if (PCI_FUNC(pdev->devfn) != 0) {
139 DPRINTK(ERR, "NetXen function %d will not be enabled.\n",
140 PCI_FUNC(pdev->devfn));
143 if ((err = pci_enable_device(pdev)))
145 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
147 goto err_out_disable_pdev;
150 if ((err = pci_request_regions(pdev, netxen_nic_driver_name)))
151 goto err_out_disable_pdev;
153 pci_set_master(pdev);
154 pci_read_config_byte(pdev, PCI_REVISION_ID, &nx_p2_id);
155 if (nx_p2_id == NX_P2_C1 &&
156 (pci_set_dma_mask(pdev, DMA_35BIT_MASK) == 0) &&
157 (pci_set_consistent_dma_mask(pdev, DMA_35BIT_MASK) == 0)) {
160 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) ||
161 (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK)))
162 goto err_out_free_res;
167 /* remap phys address */
168 mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */
169 mem_len = pci_resource_len(pdev, 0);
171 /* 128 Meg of memory */
172 mem_ptr0 = ioremap(mem_base, FIRST_PAGE_GROUP_SIZE);
174 ioremap(mem_base + SECOND_PAGE_GROUP_START, SECOND_PAGE_GROUP_SIZE);
176 ioremap(mem_base + THIRD_PAGE_GROUP_START, THIRD_PAGE_GROUP_SIZE);
178 if ((mem_ptr0 == 0UL) || (mem_ptr1 == 0UL) || (mem_ptr2 == 0UL)) {
180 "Cannot remap adapter memory aborting.:"
181 "0 -> %p, 1 -> %p, 2 -> %p\n",
182 mem_ptr0, mem_ptr1, mem_ptr2);
185 goto err_out_iounmap;
187 db_base = pci_resource_start(pdev, 4); /* doorbell is on bar 4 */
188 db_len = pci_resource_len(pdev, 4);
191 printk(KERN_ERR "%s: doorbell is disabled\n",
192 netxen_nic_driver_name);
194 goto err_out_iounmap;
196 DPRINTK(INFO, "doorbell ioremap from %lx a size of %lx\n", db_base,
199 db_ptr = ioremap(db_base, NETXEN_DB_MAPSIZE_BYTES);
201 printk(KERN_ERR "%s: Failed to allocate doorbell map.",
202 netxen_nic_driver_name);
204 goto err_out_iounmap;
206 DPRINTK(INFO, "doorbell ioremaped at %p\n", db_ptr);
209 * Allocate a adapter structure which will manage all the initialization
210 * as well as the common resources for all ports...
211 * all the ports will have pointer to this adapter as well as Adapter
212 * will have pointers of all the ports structures.
215 /* One adapter structure for all 4 ports.... */
216 adapter = kzalloc(sizeof(struct netxen_adapter), GFP_KERNEL);
217 if (adapter == NULL) {
218 printk(KERN_ERR "%s: Could not allocate adapter memory:%d\n",
219 netxen_nic_driver_name,
220 (int)sizeof(struct netxen_adapter));
222 goto err_out_dbunmap;
225 if (netxen_cards_found == 0) {
228 adapter->max_tx_desc_count = MAX_CMD_DESCRIPTORS;
229 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS;
230 adapter->max_jumbo_rx_desc_count = MAX_JUMBO_RCV_DESCRIPTORS;
231 adapter->max_lro_rx_desc_count = MAX_LRO_RCV_DESCRIPTORS;
233 pci_set_drvdata(pdev, adapter);
235 cmd_buf_arr = (struct netxen_cmd_buffer *)vmalloc(TX_RINGSIZE);
236 if (cmd_buf_arr == NULL) {
238 "%s: Could not allocate cmd_buf_arr memory:%d\n",
239 netxen_nic_driver_name, (int)TX_RINGSIZE);
241 goto err_out_free_adapter;
243 memset(cmd_buf_arr, 0, TX_RINGSIZE);
245 for (i = 0; i < MAX_RCV_CTX; ++i) {
246 recv_ctx = &adapter->recv_ctx[i];
247 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
248 rcv_desc = &recv_ctx->rcv_desc[ring];
249 switch (RCV_DESC_TYPE(ring)) {
250 case RCV_DESC_NORMAL:
251 rcv_desc->max_rx_desc_count =
252 adapter->max_rx_desc_count;
253 rcv_desc->flags = RCV_DESC_NORMAL;
254 rcv_desc->dma_size = RX_DMA_MAP_LEN;
255 rcv_desc->skb_size = MAX_RX_BUFFER_LENGTH;
259 rcv_desc->max_rx_desc_count =
260 adapter->max_jumbo_rx_desc_count;
261 rcv_desc->flags = RCV_DESC_JUMBO;
262 rcv_desc->dma_size = RX_JUMBO_DMA_MAP_LEN;
263 rcv_desc->skb_size = MAX_RX_JUMBO_BUFFER_LENGTH;
267 rcv_desc->max_rx_desc_count =
268 adapter->max_lro_rx_desc_count;
269 rcv_desc->flags = RCV_DESC_LRO;
270 rcv_desc->dma_size = RX_LRO_DMA_MAP_LEN;
271 rcv_desc->skb_size = MAX_RX_LRO_BUFFER_LENGTH;
275 rcv_desc->rx_buf_arr = (struct netxen_rx_buffer *)
276 vmalloc(RCV_BUFFSIZE);
278 if (rcv_desc->rx_buf_arr == NULL) {
279 printk(KERN_ERR "%s: Could not allocate"
280 "rcv_desc->rx_buf_arr memory:%d\n",
281 netxen_nic_driver_name,
284 goto err_out_free_rx_buffer;
286 memset(rcv_desc->rx_buf_arr, 0, RCV_BUFFSIZE);
291 adapter->cmd_buf_arr = cmd_buf_arr;
292 adapter->ahw.pci_base0 = mem_ptr0;
293 adapter->ahw.pci_base1 = mem_ptr1;
294 adapter->ahw.pci_base2 = mem_ptr2;
295 adapter->ahw.db_base = db_ptr;
296 adapter->ahw.db_len = db_len;
297 spin_lock_init(&adapter->tx_lock);
298 spin_lock_init(&adapter->lock);
299 netxen_initialize_adapter_sw(adapter); /* initialize the buffers in adapter */
301 netxen_pinit_from_rom(adapter, 0);
303 netxen_load_firmware(adapter);
307 * Set the CRB window to invalid. If any register in window 0 is
308 * accessed it should set the window to 0 and then reset it to 1.
310 adapter->curr_window = 255;
312 * Adapter in our case is quad port so initialize it before
313 * initializing the ports
315 netxen_initialize_adapter_hw(adapter); /* initialize the adapter */
317 netxen_initialize_adapter_ops(adapter);
319 init_timer(&adapter->watchdog_timer);
320 adapter->ahw.xg_linkup = 0;
321 adapter->watchdog_timer.function = &netxen_watchdog;
322 adapter->watchdog_timer.data = (unsigned long)adapter;
323 INIT_WORK(&adapter->watchdog_task, netxen_watchdog_task);
324 adapter->ahw.pdev = pdev;
325 adapter->proc_cmd_buf_counter = 0;
326 adapter->ahw.revision_id = nx_p2_id;
328 if (pci_enable_msi(pdev)) {
329 adapter->flags &= ~NETXEN_NIC_MSI_ENABLED;
330 printk(KERN_WARNING "%s: unable to allocate MSI interrupt"
331 " error\n", netxen_nic_driver_name);
333 adapter->flags |= NETXEN_NIC_MSI_ENABLED;
335 if (netxen_is_flash_supported(adapter) == 0 &&
336 netxen_get_flash_mac_addr(adapter, mac_addr) == 0)
342 * Initialize all the CRB registers here.
344 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMD_PRODUCER_OFFSET));
345 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMD_CONSUMER_OFFSET));
346 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_HOST_CMD_ADDR_LO));
348 /* do this before waking up pegs so that we have valid dummy dma addr */
349 err = netxen_initialize_adapter_offload(adapter);
351 goto err_out_free_dev;
354 /* Unlock the HW, prompting the boot sequence */
356 NETXEN_CRB_NORMALIZE(adapter, NETXEN_ROMUSB_GLB_PEGTUNE_DONE));
358 /* Handshake with the card before we register the devices. */
359 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
361 /* initialize the all the ports */
362 adapter->active_ports = 0;
364 for (i = 0; i < adapter->ahw.max_ports; i++) {
365 netdev = alloc_etherdev(sizeof(struct netxen_port));
367 printk(KERN_ERR "%s: could not allocate netdev for port"
368 " %d\n", netxen_nic_driver_name, i + 1);
369 goto err_out_free_dev;
372 SET_MODULE_OWNER(netdev);
373 SET_NETDEV_DEV(netdev, &pdev->dev);
375 port = netdev_priv(netdev);
376 port->netdev = netdev;
378 port->adapter = adapter;
379 port->portnum = i; /* Gigabit port number from 0-3 */
381 netdev->open = netxen_nic_open;
382 netdev->stop = netxen_nic_close;
383 netdev->hard_start_xmit = netxen_nic_xmit_frame;
384 netdev->get_stats = netxen_nic_get_stats;
385 netdev->set_multicast_list = netxen_nic_set_multi;
386 netdev->set_mac_address = netxen_nic_set_mac;
387 netdev->change_mtu = netxen_nic_change_mtu;
388 netdev->do_ioctl = netxen_nic_ioctl;
389 netdev->tx_timeout = netxen_tx_timeout;
390 netdev->watchdog_timeo = HZ;
392 SET_ETHTOOL_OPS(netdev, &netxen_nic_ethtool_ops);
393 netdev->poll = netxen_nic_poll;
394 netdev->weight = NETXEN_NETDEV_WEIGHT;
395 #ifdef CONFIG_NET_POLL_CONTROLLER
396 netdev->poll_controller = netxen_nic_poll_controller;
398 /* ScatterGather support */
399 netdev->features = NETIF_F_SG;
400 netdev->features |= NETIF_F_IP_CSUM;
401 netdev->features |= NETIF_F_TSO;
404 netdev->features |= NETIF_F_HIGHDMA;
407 unsigned char *p = (unsigned char *)&mac_addr[i];
408 netdev->dev_addr[0] = *(p + 5);
409 netdev->dev_addr[1] = *(p + 4);
410 netdev->dev_addr[2] = *(p + 3);
411 netdev->dev_addr[3] = *(p + 2);
412 netdev->dev_addr[4] = *(p + 1);
413 netdev->dev_addr[5] = *(p + 0);
415 memcpy(netdev->perm_addr, netdev->dev_addr,
417 if (!is_valid_ether_addr(netdev->perm_addr)) {
418 printk(KERN_ERR "%s: Bad MAC address "
419 "%02x:%02x:%02x:%02x:%02x:%02x.\n",
420 netxen_nic_driver_name,
426 netdev->dev_addr[5]);
428 if (adapter->macaddr_set)
429 adapter->macaddr_set(port,
433 adapter->netdev = netdev;
434 INIT_WORK(&adapter->tx_timeout_task, netxen_tx_timeout_task);
435 netif_carrier_off(netdev);
436 netif_stop_queue(netdev);
438 if ((err = register_netdev(netdev))) {
439 printk(KERN_ERR "%s: register_netdev failed port #%d"
440 " aborting\n", netxen_nic_driver_name, i + 1);
443 goto err_out_free_dev;
445 adapter->port_count++;
446 adapter->port[i] = port;
450 * delay a while to ensure that the Pegs are up & running.
451 * Otherwise, we might see some flaky behaviour.
455 switch (adapter->ahw.board_type) {
457 printk("%s: QUAD GbE board initialized\n",
458 netxen_nic_driver_name);
461 case NETXEN_NIC_XGBE:
462 printk("%s: XGbE board initialized\n", netxen_nic_driver_name);
466 adapter->number = netxen_cards_found;
467 adapter->driver_mismatch = 0;
472 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
473 pci_disable_msi(pdev);
474 for (i = 0; i < adapter->port_count; i++) {
475 port = adapter->port[i];
476 if ((port) && (port->netdev)) {
477 unregister_netdev(port->netdev);
478 free_netdev(port->netdev);
482 netxen_free_adapter_offload(adapter);
484 err_out_free_rx_buffer:
485 for (i = 0; i < MAX_RCV_CTX; ++i) {
486 recv_ctx = &adapter->recv_ctx[i];
487 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
488 rcv_desc = &recv_ctx->rcv_desc[ring];
489 if (rcv_desc->rx_buf_arr != NULL) {
490 vfree(rcv_desc->rx_buf_arr);
491 rcv_desc->rx_buf_arr = NULL;
497 err_out_free_adapter:
498 pci_set_drvdata(pdev, NULL);
514 pci_release_regions(pdev);
515 err_out_disable_pdev:
516 pci_disable_device(pdev);
520 static void __devexit netxen_nic_remove(struct pci_dev *pdev)
522 struct netxen_adapter *adapter;
523 struct netxen_port *port;
524 struct netxen_rx_buffer *buffer;
525 struct netxen_recv_context *recv_ctx;
526 struct netxen_rcv_desc_ctx *rcv_desc;
530 adapter = pci_get_drvdata(pdev);
534 netxen_nic_stop_all_ports(adapter);
535 /* leave the hw in the same state as reboot */
536 netxen_load_firmware(adapter);
537 netxen_free_adapter_offload(adapter);
539 udelay(500); /* Delay for a while to drain the DMA engines */
540 for (i = 0; i < adapter->port_count; i++) {
541 port = adapter->port[i];
542 if ((port) && (port->netdev)) {
543 unregister_netdev(port->netdev);
544 free_netdev(port->netdev);
548 if ((adapter->flags & NETXEN_NIC_MSI_ENABLED))
549 pci_disable_msi(pdev);
550 pci_set_drvdata(pdev, NULL);
551 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC)
552 netxen_free_hw_resources(adapter);
554 iounmap(adapter->ahw.db_base);
555 iounmap(adapter->ahw.pci_base0);
556 iounmap(adapter->ahw.pci_base1);
557 iounmap(adapter->ahw.pci_base2);
559 pci_release_regions(pdev);
560 pci_disable_device(pdev);
562 for (ctxid = 0; ctxid < MAX_RCV_CTX; ++ctxid) {
563 recv_ctx = &adapter->recv_ctx[ctxid];
564 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
565 rcv_desc = &recv_ctx->rcv_desc[ring];
566 for (i = 0; i < rcv_desc->max_rx_desc_count; ++i) {
567 buffer = &(rcv_desc->rx_buf_arr[i]);
568 if (buffer->state == NETXEN_BUFFER_FREE)
570 pci_unmap_single(pdev, buffer->dma,
573 if (buffer->skb != NULL)
574 dev_kfree_skb_any(buffer->skb);
576 vfree(rcv_desc->rx_buf_arr);
580 vfree(adapter->cmd_buf_arr);
585 * Called when a network interface is made active
586 * @returns 0 on success, negative value on failure
588 static int netxen_nic_open(struct net_device *netdev)
590 struct netxen_port *port = netdev_priv(netdev);
591 struct netxen_adapter *adapter = port->adapter;
595 if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC) {
596 err = netxen_init_firmware(adapter);
598 printk(KERN_ERR "Failed to init firmware\n");
601 netxen_nic_flash_print(adapter);
602 if (adapter->init_niu)
603 adapter->init_niu(adapter);
605 /* setup all the resources for the Phantom... */
606 /* this include the descriptors for rcv, tx, and status */
607 netxen_nic_clear_stats(adapter);
608 err = netxen_nic_hw_resources(adapter);
610 printk(KERN_ERR "Error in setting hw resources:%d\n",
614 if (adapter->init_port
615 && adapter->init_port(adapter, port->portnum) != 0) {
616 printk(KERN_ERR "%s: Failed to initialize port %d\n",
617 netxen_nic_driver_name, port->portnum);
618 netxen_free_hw_resources(adapter);
621 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
622 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++)
623 netxen_post_rx_buffers(adapter, ctx, ring);
625 adapter->irq = adapter->ahw.pdev->irq;
626 err = request_irq(adapter->ahw.pdev->irq, &netxen_intr,
627 SA_SHIRQ | SA_SAMPLE_RANDOM, netdev->name,
630 printk(KERN_ERR "request_irq failed with: %d\n", err);
631 netxen_free_hw_resources(adapter);
635 adapter->is_up = NETXEN_ADAPTER_UP_MAGIC;
637 adapter->active_ports++;
638 if (adapter->active_ports == 1) {
639 if (!adapter->driver_mismatch)
640 mod_timer(&adapter->watchdog_timer, jiffies);
642 netxen_nic_enable_int(adapter);
645 /* Done here again so that even if phantom sw overwrote it,
647 if (adapter->macaddr_set)
648 adapter->macaddr_set(port, netdev->dev_addr);
649 netxen_nic_set_link_parameters(port);
651 netxen_nic_set_multi(netdev);
652 if (adapter->set_mtu)
653 adapter->set_mtu(port, netdev->mtu);
655 if (!adapter->driver_mismatch)
656 netif_start_queue(netdev);
662 * netxen_nic_close - Disables a network interface entry point
664 static int netxen_nic_close(struct net_device *netdev)
666 struct netxen_port *port = netdev_priv(netdev);
667 struct netxen_adapter *adapter = port->adapter;
669 struct netxen_cmd_buffer *cmd_buff;
670 struct netxen_skb_frag *buffrag;
672 netif_carrier_off(netdev);
673 netif_stop_queue(netdev);
675 adapter->active_ports--;
677 if (!adapter->active_ports) {
678 netxen_nic_disable_int(adapter);
680 free_irq(adapter->irq, adapter);
681 cmd_buff = adapter->cmd_buf_arr;
682 for (i = 0; i < adapter->max_tx_desc_count; i++) {
683 buffrag = cmd_buff->frag_array;
685 pci_unmap_single(port->pdev, buffrag->dma,
688 buffrag->dma = (u64) NULL;
690 for (j = 0; j < cmd_buff->frag_count; j++) {
693 pci_unmap_page(port->pdev,
697 buffrag->dma = (u64) NULL;
700 /* Free the skb we received in netxen_nic_xmit_frame */
702 dev_kfree_skb_any(cmd_buff->skb);
703 cmd_buff->skb = NULL;
707 FLUSH_SCHEDULED_WORK();
708 del_timer_sync(&adapter->watchdog_timer);
714 static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
716 struct netxen_port *port = netdev_priv(netdev);
717 struct netxen_adapter *adapter = port->adapter;
718 struct netxen_hardware_context *hw = &adapter->ahw;
719 unsigned int first_seg_len = skb->len - skb->data_len;
720 struct netxen_skb_frag *buffrag;
724 u32 saved_producer = 0;
725 struct cmd_desc_type0 *hwdesc;
727 struct netxen_cmd_buffer *pbuf = NULL;
728 static int dropped_packet = 0;
730 u32 local_producer = 0;
731 u32 max_tx_desc_count = 0;
732 u32 last_cmd_consumer = 0;
735 port->stats.xmitcalled++;
736 frag_count = skb_shinfo(skb)->nr_frags + 1;
738 if (unlikely(skb->len <= 0)) {
739 dev_kfree_skb_any(skb);
740 port->stats.badskblen++;
744 if (frag_count > MAX_BUFFERS_PER_CMD) {
745 printk("%s: %s netxen_nic_xmit_frame: frag_count (%d)"
746 "too large, can handle only %d frags\n",
747 netxen_nic_driver_name, netdev->name,
748 frag_count, MAX_BUFFERS_PER_CMD);
749 port->stats.txdropped++;
750 if ((++dropped_packet & 0xff) == 0xff)
751 printk("%s: %s droppped packets = %d\n",
752 netxen_nic_driver_name, netdev->name,
759 * Everything is set up. Now, we just need to transmit it out.
760 * Note that we have to copy the contents of buffer over to
761 * right place. Later on, this can be optimized out by de-coupling the
762 * producer index from the buffer index.
764 retry_getting_window:
765 spin_lock_bh(&adapter->tx_lock);
766 if (adapter->total_threads == MAX_XMIT_PRODUCERS) {
767 spin_unlock_bh(&adapter->tx_lock);
774 for (i = 0; i < 20; i++)
775 cpu_relax(); /*This a nop instr on i386 */
777 goto retry_getting_window;
779 local_producer = adapter->cmd_producer;
780 /* There 4 fragments per descriptor */
781 no_of_desc = (frag_count + 3) >> 2;
782 if (netdev->features & NETIF_F_TSO) {
783 if (skb_shinfo(skb)->gso_size > 0) {
786 if (((skb->nh.iph)->ihl * sizeof(u32)) +
787 ((skb->h.th)->doff * sizeof(u32)) +
788 sizeof(struct ethhdr) >
789 (sizeof(struct cmd_desc_type0) - 2)) {
794 k = adapter->cmd_producer;
795 max_tx_desc_count = adapter->max_tx_desc_count;
796 last_cmd_consumer = adapter->last_cmd_consumer;
797 if ((k + no_of_desc) >=
798 ((last_cmd_consumer <= k) ? last_cmd_consumer + max_tx_desc_count :
799 last_cmd_consumer)) {
800 port->stats.nocmddescriptor++;
801 DPRINTK(ERR, "No command descriptors available,"
802 " producer = %d, consumer = %d count=%llu,"
803 " dropping packet\n", producer,
804 adapter->last_cmd_consumer,
805 port->stats.nocmddescriptor);
807 netif_stop_queue(netdev);
808 port->flags |= NETXEN_NETDEV_STATUS;
809 spin_unlock_bh(&adapter->tx_lock);
810 return NETDEV_TX_BUSY;
812 k = get_index_range(k, max_tx_desc_count, no_of_desc);
813 adapter->cmd_producer = k;
814 adapter->total_threads++;
815 adapter->num_threads++;
817 spin_unlock_bh(&adapter->tx_lock);
818 /* Copy the descriptors into the hardware */
819 producer = local_producer;
820 saved_producer = producer;
821 hwdesc = &hw->cmd_desc_head[producer];
822 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
823 /* Take skb->data itself */
824 pbuf = &adapter->cmd_buf_arr[producer];
825 if ((netdev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size > 0) {
826 pbuf->mss = skb_shinfo(skb)->gso_size;
827 hwdesc->mss = skb_shinfo(skb)->gso_size;
832 pbuf->total_length = skb->len;
834 pbuf->cmd = TX_ETHER_PKT;
835 pbuf->frag_count = frag_count;
836 pbuf->port = port->portnum;
837 buffrag = &pbuf->frag_array[0];
838 buffrag->dma = pci_map_single(port->pdev, skb->data, first_seg_len,
840 buffrag->length = first_seg_len;
841 netxen_set_cmd_desc_totallength(hwdesc, skb->len);
842 netxen_set_cmd_desc_num_of_buff(hwdesc, frag_count);
843 netxen_set_cmd_desc_opcode(hwdesc, TX_ETHER_PKT);
845 netxen_set_cmd_desc_port(hwdesc, port->portnum);
846 hwdesc->buffer1_length = cpu_to_le16(first_seg_len);
847 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
849 for (i = 1, k = 1; i < frag_count; i++, k++) {
850 struct skb_frag_struct *frag;
852 unsigned long offset;
855 /* move to next desc. if there is a need */
856 if ((i & 0x3) == 0) {
858 producer = get_next_index(producer,
859 adapter->max_tx_desc_count);
860 hwdesc = &hw->cmd_desc_head[producer];
861 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
863 frag = &skb_shinfo(skb)->frags[i - 1];
865 offset = frag->page_offset;
868 temp_dma = pci_map_page(port->pdev, frag->page, offset,
869 len, PCI_DMA_TODEVICE);
872 buffrag->dma = temp_dma;
873 buffrag->length = temp_len;
875 DPRINTK(INFO, "for loop. i=%d k=%d\n", i, k);
878 hwdesc->buffer1_length = cpu_to_le16(temp_len);
879 hwdesc->addr_buffer1 = cpu_to_le64(temp_dma);
882 hwdesc->buffer2_length = cpu_to_le16(temp_len);
883 hwdesc->addr_buffer2 = cpu_to_le64(temp_dma);
886 hwdesc->buffer3_length = cpu_to_le16(temp_len);
887 hwdesc->addr_buffer3 = cpu_to_le64(temp_dma);
890 hwdesc->buffer4_length = temp_len;
891 hwdesc->addr_buffer4 = cpu_to_le64(temp_dma);
896 producer = get_next_index(producer, adapter->max_tx_desc_count);
898 /* might change opcode to TX_TCP_LSO */
899 netxen_tso_check(adapter, &hw->cmd_desc_head[saved_producer], skb);
901 /* For LSO, we need to copy the MAC/IP/TCP headers into
902 * the descriptor ring
904 if (netxen_get_cmd_desc_opcode(&hw->cmd_desc_head[saved_producer])
906 int hdr_len, first_hdr_len, more_hdr;
907 hdr_len = hw->cmd_desc_head[saved_producer].total_hdr_length;
908 if (hdr_len > (sizeof(struct cmd_desc_type0) - 2)) {
909 first_hdr_len = sizeof(struct cmd_desc_type0) - 2;
912 first_hdr_len = hdr_len;
915 /* copy the MAC/IP/TCP headers to the cmd descriptor list */
916 hwdesc = &hw->cmd_desc_head[producer];
918 /* copy the first 64 bytes */
919 memcpy(((void *)hwdesc) + 2,
920 (void *)(skb->data), first_hdr_len);
921 producer = get_next_index(producer, max_tx_desc_count);
924 hwdesc = &hw->cmd_desc_head[producer];
925 /* copy the next 64 bytes - should be enough except
926 * for pathological case
928 memcpy((void *)hwdesc, (void *)(skb->data) +
929 first_hdr_len, hdr_len - first_hdr_len);
930 producer = get_next_index(producer, max_tx_desc_count);
933 spin_lock_bh(&adapter->tx_lock);
934 port->stats.txbytes +=
935 netxen_get_cmd_desc_totallength(&hw->cmd_desc_head[saved_producer]);
936 /* Code to update the adapter considering how many producer threads
937 are currently working */
938 if ((--adapter->num_threads) == 0) {
939 /* This is the last thread */
940 u32 crb_producer = adapter->cmd_producer;
942 NETXEN_CRB_NORMALIZE(adapter, CRB_CMD_PRODUCER_OFFSET));
944 adapter->total_threads = 0;
947 port->stats.xmitfinished++;
948 spin_unlock_bh(&adapter->tx_lock);
950 netdev->trans_start = jiffies;
952 DPRINTK(INFO, "wrote CMD producer %x to phantom\n", producer);
954 DPRINTK(INFO, "Done. Send\n");
958 static void netxen_watchdog(unsigned long v)
960 struct netxen_adapter *adapter = (struct netxen_adapter *)v;
961 if (adapter != g_adapter) {
962 printk("%s: ***BUG*** adapter[%p] != g_adapter[%p]\n",
963 __FUNCTION__, adapter, g_adapter);
967 SCHEDULE_WORK(&adapter->watchdog_task);
970 static void netxen_tx_timeout(struct net_device *netdev)
972 struct netxen_port *port = (struct netxen_port *)netdev_priv(netdev);
974 SCHEDULE_WORK(&port->adapter->tx_timeout_task);
977 static void netxen_tx_timeout_task(struct work_struct *work)
979 struct netxen_adapter *adapter =
980 container_of(work, struct netxen_adapter, tx_timeout_task);
981 struct net_device *netdev = adapter->netdev;
984 printk(KERN_ERR "%s %s: transmit timeout, resetting.\n",
985 netxen_nic_driver_name, netdev->name);
987 spin_lock_irqsave(&adapter->lock, flags);
988 netxen_nic_close(netdev);
989 netxen_nic_open(netdev);
990 spin_unlock_irqrestore(&adapter->lock, flags);
991 netdev->trans_start = jiffies;
992 netif_wake_queue(netdev);
996 netxen_handle_int(struct netxen_adapter *adapter, struct net_device *netdev)
1000 DPRINTK(INFO, "Entered handle ISR\n");
1002 adapter->stats.ints++;
1004 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
1007 mask = readl(pci_base_offset(adapter, ISR_INT_VECTOR));
1008 if ((mask & 0x80) == 0) {
1009 /* not our interrupt */
1012 netxen_nic_disable_int(adapter);
1013 /* Window = 0 or 1 */
1015 writel(0xffffffff, PCI_OFFSET_SECOND_RANGE(adapter,
1016 ISR_INT_TARGET_STATUS));
1017 mask = readl(pci_base_offset(adapter, ISR_INT_VECTOR));
1018 } while (((mask & 0x80) != 0) && (++count < 32));
1019 if ((mask & 0x80) != 0)
1020 printk("Could not disable interrupt completely\n");
1023 adapter->stats.hostints++;
1025 if (netxen_nic_rx_has_work(adapter) || netxen_nic_tx_has_work(adapter)) {
1026 if (netif_rx_schedule_prep(netdev)) {
1028 * Interrupts are already disabled.
1030 __netif_rx_schedule(netdev);
1032 static unsigned int intcount = 0;
1033 if ((++intcount & 0xfff) == 0xfff)
1035 "%s: %s interrupt %d while in poll\n",
1036 netxen_nic_driver_name, netdev->name,
1043 netxen_nic_enable_int(adapter);
1050 * netxen_intr - Interrupt Handler
1051 * @irq: interrupt number
1052 * data points to adapter stucture (which may be handling more than 1 port
1054 irqreturn_t netxen_intr(int irq, void *data)
1056 struct netxen_adapter *adapter;
1057 struct netxen_port *port;
1058 struct net_device *netdev;
1061 if (unlikely(!irq)) {
1062 return IRQ_NONE; /* Not our interrupt */
1065 adapter = (struct netxen_adapter *)data;
1066 for (i = 0; i < adapter->ahw.max_ports; i++) {
1067 port = adapter->port[i];
1068 netdev = port->netdev;
1070 /* process our status queue (for all 4 ports) */
1071 if (netif_running(netdev)) {
1072 netxen_handle_int(adapter, netdev);
1080 static int netxen_nic_poll(struct net_device *netdev, int *budget)
1082 struct netxen_port *port = (struct netxen_port *)netdev_priv(netdev);
1083 struct netxen_adapter *adapter = port->adapter;
1084 int work_to_do = min(*budget, netdev->quota);
1090 DPRINTK(INFO, "polling for %d descriptors\n", *budget);
1091 port->stats.polled++;
1094 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
1096 * Fairness issue. This will give undue weight to the
1097 * receive context 0.
1101 * To avoid starvation, we give each of our receivers,
1102 * a fraction of the quota. Sometimes, it might happen that we
1103 * have enough quota to process every packet, but since all the
1104 * packets are on one context, it gets only half of the quota,
1105 * and ends up not processing it.
1107 this_work_done = netxen_process_rcv_ring(adapter, ctx,
1110 work_done += this_work_done;
1113 netdev->quota -= work_done;
1114 *budget -= work_done;
1116 if (work_done >= work_to_do && netxen_nic_rx_has_work(adapter) != 0)
1119 if (netxen_process_cmd_ring((unsigned long)adapter) == 0)
1122 DPRINTK(INFO, "new work_done: %d work_to_do: %d\n",
1123 work_done, work_to_do);
1125 netif_rx_complete(netdev);
1126 netxen_nic_enable_int(adapter);
1132 #ifdef CONFIG_NET_POLL_CONTROLLER
1133 static void netxen_nic_poll_controller(struct net_device *netdev)
1135 struct netxen_port *port = netdev_priv(netdev);
1136 struct netxen_adapter *adapter = port->adapter;
1137 disable_irq(adapter->irq);
1138 netxen_intr(adapter->irq, adapter);
1139 enable_irq(adapter->irq);
1143 * netxen_nic_ioctl () We provide the tcl/phanmon support through these
1147 netxen_nic_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1150 unsigned long nr_bytes = 0;
1151 struct netxen_port *port = netdev_priv(netdev);
1152 struct netxen_adapter *adapter = port->adapter;
1153 char dev_name[NETXEN_NIC_NAME_LEN];
1155 DPRINTK(INFO, "doing ioctl for %s\n", netdev->name);
1157 case NETXEN_NIC_CMD:
1158 err = netxen_nic_do_ioctl(adapter, (void *)ifr->ifr_data, port);
1161 case NETXEN_NIC_NAME:
1162 DPRINTK(INFO, "ioctl cmd for NetXen\n");
1163 if (ifr->ifr_data) {
1164 sprintf(dev_name, "%s-%d", NETXEN_NIC_NAME_RSP,
1167 copy_to_user((char __user *)ifr->ifr_data, dev_name,
1168 NETXEN_NIC_NAME_LEN);
1176 DPRINTK(INFO, "ioctl cmd %x not supported\n", cmd);
1184 static struct pci_driver netxen_driver = {
1185 .name = netxen_nic_driver_name,
1186 .id_table = netxen_pci_tbl,
1187 .probe = netxen_nic_probe,
1188 .remove = __devexit_p(netxen_nic_remove)
1191 /* Driver Registration on NetXen card */
1193 static int __init netxen_init_module(void)
1195 if ((netxen_workq = create_singlethread_workqueue("netxen")) == 0)
1198 return pci_module_init(&netxen_driver);
1201 module_init(netxen_init_module);
1203 static void __exit netxen_exit_module(void)
1206 * Wait for some time to allow the dma to drain, if any.
1208 destroy_workqueue(netxen_workq);
1209 pci_unregister_driver(&netxen_driver);
1212 module_exit(netxen_exit_module);