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 "netxen_nic_hw.h"
36 #include "netxen_nic.h"
37 #define DEFINE_GLOBAL_RECV_CRB
38 #include "netxen_nic_phan_reg.h"
39 #include "netxen_nic_ioctl.h"
41 #include <linux/dma-mapping.h>
42 #include <linux/vmalloc.h>
44 MODULE_DESCRIPTION("NetXen Multi port (1/10) Gigabit Network Driver");
45 MODULE_LICENSE("GPL");
46 MODULE_VERSION(NETXEN_NIC_LINUX_VERSIONID);
48 char netxen_nic_driver_name[] = "netxen";
49 static char netxen_nic_driver_string[] = "NetXen Network Driver version "
50 NETXEN_NIC_LINUX_VERSIONID "-" NETXEN_NIC_BUILD_NO;
52 #define NETXEN_NETDEV_WEIGHT 120
53 #define NETXEN_ADAPTER_UP_MAGIC 777
55 /* Local functions to NetXen NIC driver */
56 static int __devinit netxen_nic_probe(struct pci_dev *pdev,
57 const struct pci_device_id *ent);
58 static void __devexit netxen_nic_remove(struct pci_dev *pdev);
59 static int netxen_nic_open(struct net_device *netdev);
60 static int netxen_nic_close(struct net_device *netdev);
61 static int netxen_nic_xmit_frame(struct sk_buff *, struct net_device *);
62 static void netxen_tx_timeout(struct net_device *netdev);
63 static void netxen_tx_timeout_task(struct net_device *netdev);
64 static void netxen_watchdog(unsigned long);
65 static int netxen_handle_int(struct netxen_adapter *, struct net_device *);
66 static int netxen_nic_ioctl(struct net_device *netdev,
67 struct ifreq *ifr, int cmd);
68 static int netxen_nic_poll(struct net_device *dev, int *budget);
69 #ifdef CONFIG_NET_POLL_CONTROLLER
70 static void netxen_nic_poll_controller(struct net_device *netdev);
72 static irqreturn_t netxen_intr(int irq, void *data);
74 /* PCI Device ID Table */
75 static struct pci_device_id netxen_pci_tbl[] __devinitdata = {
76 {PCI_DEVICE(0x4040, 0x0001)},
77 {PCI_DEVICE(0x4040, 0x0002)},
78 {PCI_DEVICE(0x4040, 0x0003)},
79 {PCI_DEVICE(0x4040, 0x0004)},
80 {PCI_DEVICE(0x4040, 0x0005)},
84 MODULE_DEVICE_TABLE(pci, netxen_pci_tbl);
89 * The Linux system will invoke this after identifying the vendor ID and
90 * device Id in the pci_tbl supported by this module.
92 * A quad port card has one operational PCI config space, (function 0),
93 * which is used to access all four ports.
95 * This routine will initialize the adapter, and setup the global parameters
96 * along with the port's specific structure.
99 netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
101 struct net_device *netdev = NULL;
102 struct netxen_adapter *adapter = NULL;
103 struct netxen_port *port = NULL;
104 u8 __iomem *mem_ptr = NULL;
105 unsigned long mem_base, mem_len;
106 int pci_using_dac, i, err;
108 struct netxen_recv_context *recv_ctx = NULL;
109 struct netxen_rcv_desc_ctx *rcv_desc = NULL;
110 struct netxen_cmd_buffer *cmd_buf_arr = NULL;
111 u64 mac_addr[FLASH_NUM_PORTS + 1];
114 if ((err = pci_enable_device(pdev)))
116 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
118 goto err_out_disable_pdev;
121 if ((err = pci_request_regions(pdev, netxen_nic_driver_name)))
122 goto err_out_disable_pdev;
124 pci_set_master(pdev);
125 if ((pci_set_dma_mask(pdev, DMA_64BIT_MASK) == 0) &&
126 (pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK) == 0))
129 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) ||
130 (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK)))
131 goto err_out_free_res;
136 /* remap phys address */
137 mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */
138 mem_len = pci_resource_len(pdev, 0);
140 /* 128 Meg of memory */
141 mem_ptr = ioremap(mem_base, NETXEN_PCI_MAPSIZE_BYTES);
142 if (mem_ptr == 0UL) {
143 printk(KERN_ERR "%s: Cannot ioremap adapter memory aborting."
144 ":%p\n", netxen_nic_driver_name, mem_ptr);
146 goto err_out_free_res;
150 * Allocate a adapter structure which will manage all the initialization
151 * as well as the common resources for all ports...
152 * all the ports will have pointer to this adapter as well as Adapter
153 * will have pointers of all the ports structures.
156 /* One adapter structure for all 4 ports.... */
157 adapter = kzalloc(sizeof(struct netxen_adapter), GFP_KERNEL);
158 if (adapter == NULL) {
159 printk(KERN_ERR "%s: Could not allocate adapter memory:%d\n",
160 netxen_nic_driver_name,
161 (int)sizeof(struct netxen_adapter));
163 goto err_out_iounmap;
166 adapter->max_tx_desc_count = MAX_CMD_DESCRIPTORS;
167 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS;
168 adapter->max_jumbo_rx_desc_count = MAX_JUMBO_RCV_DESCRIPTORS;
170 pci_set_drvdata(pdev, adapter);
172 cmd_buf_arr = (struct netxen_cmd_buffer *)vmalloc(TX_RINGSIZE);
173 if (cmd_buf_arr == NULL) {
175 goto err_out_free_adapter;
177 memset(cmd_buf_arr, 0, TX_RINGSIZE);
179 for (i = 0; i < MAX_RCV_CTX; ++i) {
180 recv_ctx = &adapter->recv_ctx[i];
181 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
182 rcv_desc = &recv_ctx->rcv_desc[ring];
183 switch (RCV_DESC_TYPE(ring)) {
184 case RCV_DESC_NORMAL:
185 rcv_desc->max_rx_desc_count =
186 adapter->max_rx_desc_count;
187 rcv_desc->flags = RCV_DESC_NORMAL;
188 rcv_desc->dma_size = RX_DMA_MAP_LEN;
189 rcv_desc->skb_size = MAX_RX_BUFFER_LENGTH;
193 rcv_desc->max_rx_desc_count =
194 adapter->max_jumbo_rx_desc_count;
195 rcv_desc->flags = RCV_DESC_JUMBO;
196 rcv_desc->dma_size = RX_JUMBO_DMA_MAP_LEN;
197 rcv_desc->skb_size = MAX_RX_JUMBO_BUFFER_LENGTH;
201 rcv_desc->rx_buf_arr = (struct netxen_rx_buffer *)
202 vmalloc(RCV_BUFFSIZE);
204 if (rcv_desc->rx_buf_arr == NULL) {
206 goto err_out_free_rx_buffer;
208 memset(rcv_desc->rx_buf_arr, 0, RCV_BUFFSIZE);
213 adapter->ops = kzalloc(sizeof(struct netxen_drvops), GFP_KERNEL);
214 if (adapter->ops == NULL) {
216 "%s: Could not allocate memory for adapter->ops:%d\n",
217 netxen_nic_driver_name,
218 (int)sizeof(struct netxen_adapter));
220 goto err_out_free_rx_buffer;
223 adapter->cmd_buf_arr = cmd_buf_arr;
224 adapter->ahw.pci_base = mem_ptr;
225 spin_lock_init(&adapter->tx_lock);
226 spin_lock_init(&adapter->lock);
227 /* initialize the buffers in adapter */
228 netxen_initialize_adapter_sw(adapter);
230 * Set the CRB window to invalid. If any register in window 0 is
231 * accessed it should set the window to 0 and then reset it to 1.
233 adapter->curr_window = 255;
235 * Adapter in our case is quad port so initialize it before
236 * initializing the ports
238 netxen_initialize_adapter_hw(adapter); /* initialize the adapter */
240 netxen_initialize_adapter_ops(adapter);
242 init_timer(&adapter->watchdog_timer);
243 adapter->ahw.xg_linkup = 0;
244 adapter->watchdog_timer.function = &netxen_watchdog;
245 adapter->watchdog_timer.data = (unsigned long)adapter;
246 INIT_WORK(&adapter->watchdog_task,
247 (void (*)(void *))netxen_watchdog_task, adapter);
248 adapter->ahw.pdev = pdev;
249 adapter->proc_cmd_buf_counter = 0;
250 pci_read_config_byte(pdev, PCI_REVISION_ID, &adapter->ahw.revision_id);
252 if (pci_enable_msi(pdev)) {
253 adapter->flags &= ~NETXEN_NIC_MSI_ENABLED;
254 printk(KERN_WARNING "%s: unable to allocate MSI interrupt"
255 " error\n", netxen_nic_driver_name);
257 adapter->flags |= NETXEN_NIC_MSI_ENABLED;
259 if (netxen_is_flash_supported(adapter) == 0 &&
260 netxen_get_flash_mac_addr(adapter, mac_addr) == 0)
265 /* initialize the all the ports */
267 for (i = 0; i < adapter->ahw.max_ports; i++) {
268 netdev = alloc_etherdev(sizeof(struct netxen_port));
270 printk(KERN_ERR "%s: could not allocate netdev for port"
271 " %d\n", netxen_nic_driver_name, i + 1);
272 goto err_out_free_dev;
275 SET_MODULE_OWNER(netdev);
276 SET_NETDEV_DEV(netdev, &pdev->dev);
278 port = netdev_priv(netdev);
279 port->netdev = netdev;
281 port->adapter = adapter;
282 port->portnum = i; /* Gigabit port number from 0-3 */
284 netdev->open = netxen_nic_open;
285 netdev->stop = netxen_nic_close;
286 netdev->hard_start_xmit = netxen_nic_xmit_frame;
287 netdev->get_stats = netxen_nic_get_stats;
288 netdev->set_multicast_list = netxen_nic_set_multi;
289 netdev->set_mac_address = netxen_nic_set_mac;
290 netdev->change_mtu = netxen_nic_change_mtu;
291 netdev->do_ioctl = netxen_nic_ioctl;
292 netdev->tx_timeout = netxen_tx_timeout;
293 netdev->watchdog_timeo = HZ;
295 SET_ETHTOOL_OPS(netdev, &netxen_nic_ethtool_ops);
296 netdev->poll = netxen_nic_poll;
297 netdev->weight = NETXEN_NETDEV_WEIGHT;
298 #ifdef CONFIG_NET_POLL_CONTROLLER
299 netdev->poll_controller = netxen_nic_poll_controller;
301 /* ScatterGather support */
302 netdev->features = NETIF_F_SG;
303 netdev->features |= NETIF_F_IP_CSUM;
304 netdev->features |= NETIF_F_TSO;
307 netdev->features |= NETIF_F_HIGHDMA;
310 unsigned char *p = (unsigned char *)&mac_addr[i];
311 netdev->dev_addr[0] = *(p + 5);
312 netdev->dev_addr[1] = *(p + 4);
313 netdev->dev_addr[2] = *(p + 3);
314 netdev->dev_addr[3] = *(p + 2);
315 netdev->dev_addr[4] = *(p + 1);
316 netdev->dev_addr[5] = *(p + 0);
318 memcpy(netdev->perm_addr, netdev->dev_addr,
320 if (!is_valid_ether_addr(netdev->perm_addr)) {
321 printk(KERN_ERR "%s: Bad MAC address "
322 "%02x:%02x:%02x:%02x:%02x:%02x.\n",
323 netxen_nic_driver_name,
329 netdev->dev_addr[5]);
331 if (adapter->ops->macaddr_set)
332 adapter->ops->macaddr_set(port,
337 INIT_WORK(&adapter->tx_timeout_task,
338 (void (*)(void *))netxen_tx_timeout_task, netdev);
339 netif_carrier_off(netdev);
340 netif_stop_queue(netdev);
342 if ((err = register_netdev(netdev))) {
343 printk(KERN_ERR "%s: register_netdev failed port #%d"
344 " aborting\n", netxen_nic_driver_name, i + 1);
347 goto err_out_free_dev;
349 adapter->port_count++;
350 adapter->active_ports = 0;
351 adapter->port[i] = port;
355 * Initialize all the CRB registers here.
358 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMD_PRODUCER_OFFSET));
359 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMD_CONSUMER_OFFSET));
360 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_HOST_CMD_ADDR_LO));
362 netxen_phantom_init(adapter);
364 * delay a while to ensure that the Pegs are up & running.
365 * Otherwise, we might see some flaky behaviour.
369 switch (adapter->ahw.board_type) {
371 printk("%s: QUAD GbE board initialized\n",
372 netxen_nic_driver_name);
375 case NETXEN_NIC_XGBE:
376 printk("%s: XGbE board initialized\n", netxen_nic_driver_name);
380 adapter->driver_mismatch = 0;
385 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
386 pci_disable_msi(pdev);
387 for (i = 0; i < adapter->port_count; i++) {
388 port = adapter->port[i];
389 if ((port) && (port->netdev)) {
390 unregister_netdev(port->netdev);
391 free_netdev(port->netdev);
396 err_out_free_rx_buffer:
397 for (i = 0; i < MAX_RCV_CTX; ++i) {
398 recv_ctx = &adapter->recv_ctx[i];
399 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
400 rcv_desc = &recv_ctx->rcv_desc[ring];
401 if (rcv_desc->rx_buf_arr != NULL) {
402 vfree(rcv_desc->rx_buf_arr);
403 rcv_desc->rx_buf_arr = NULL;
410 kfree(adapter->port);
412 err_out_free_adapter:
413 pci_set_drvdata(pdev, NULL);
419 pci_release_regions(pdev);
420 err_out_disable_pdev:
421 pci_disable_device(pdev);
425 static void __devexit netxen_nic_remove(struct pci_dev *pdev)
427 struct netxen_adapter *adapter;
428 struct netxen_port *port;
429 struct netxen_rx_buffer *buffer;
430 struct netxen_recv_context *recv_ctx;
431 struct netxen_rcv_desc_ctx *rcv_desc;
435 adapter = pci_get_drvdata(pdev);
439 netxen_nic_stop_all_ports(adapter);
440 /* leave the hw in the same state as reboot */
441 netxen_pinit_from_rom(adapter, 0);
443 netxen_load_firmware(adapter);
445 if ((adapter->flags & NETXEN_NIC_MSI_ENABLED))
446 netxen_nic_disable_int(adapter);
448 udelay(500); /* Delay for a while to drain the DMA engines */
449 for (i = 0; i < adapter->port_count; i++) {
450 port = adapter->port[i];
451 if ((port) && (port->netdev)) {
452 unregister_netdev(port->netdev);
453 free_netdev(port->netdev);
457 if ((adapter->flags & NETXEN_NIC_MSI_ENABLED))
458 pci_disable_msi(pdev);
459 pci_set_drvdata(pdev, NULL);
460 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC)
461 netxen_free_hw_resources(adapter);
463 iounmap(adapter->ahw.pci_base);
465 pci_release_regions(pdev);
466 pci_disable_device(pdev);
468 for (ctxid = 0; ctxid < MAX_RCV_CTX; ++ctxid) {
469 recv_ctx = &adapter->recv_ctx[ctxid];
470 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
471 rcv_desc = &recv_ctx->rcv_desc[ring];
472 for (i = 0; i < rcv_desc->max_rx_desc_count; ++i) {
473 buffer = &(rcv_desc->rx_buf_arr[i]);
474 if (buffer->state == NETXEN_BUFFER_FREE)
476 pci_unmap_single(pdev, buffer->dma,
479 if (buffer->skb != NULL)
480 dev_kfree_skb_any(buffer->skb);
482 vfree(rcv_desc->rx_buf_arr);
486 vfree(adapter->cmd_buf_arr);
492 * Called when a network interface is made active
493 * @returns 0 on success, negative value on failure
495 static int netxen_nic_open(struct net_device *netdev)
497 struct netxen_port *port = netdev_priv(netdev);
498 struct netxen_adapter *adapter = port->adapter;
499 struct netxen_rcv_desc_ctx *rcv_desc;
503 if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC) {
504 err = netxen_init_firmware(adapter);
506 printk(KERN_ERR "Failed to init firmware\n");
509 netxen_nic_flash_print(adapter);
511 /* setup all the resources for the Phantom... */
512 /* this include the descriptors for rcv, tx, and status */
513 netxen_nic_clear_stats(adapter);
514 err = netxen_nic_hw_resources(adapter);
516 printk(KERN_ERR "Error in setting hw resources:%d\n",
520 if (adapter->ops->init_port
521 && adapter->ops->init_port(adapter, port->portnum) != 0) {
522 printk(KERN_ERR "%s: Failed to initialize port %d\n",
523 netxen_nic_driver_name, port->portnum);
524 netxen_free_hw_resources(adapter);
527 if (adapter->ops->init_niu)
528 adapter->ops->init_niu(adapter);
529 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
530 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
532 &adapter->recv_ctx[ctx].rcv_desc[ring];
533 netxen_post_rx_buffers(adapter, ctx, ring);
536 adapter->is_up = NETXEN_ADAPTER_UP_MAGIC;
538 adapter->active_ports++;
539 if (adapter->active_ports == 1) {
540 err = request_irq(adapter->ahw.pdev->irq, &netxen_intr,
541 SA_SHIRQ | SA_SAMPLE_RANDOM, netdev->name,
544 printk(KERN_ERR "request_irq failed with: %d\n", err);
545 adapter->active_ports--;
548 adapter->irq = adapter->ahw.pdev->irq;
549 if (!adapter->driver_mismatch)
550 mod_timer(&adapter->watchdog_timer, jiffies);
552 netxen_nic_enable_int(adapter);
555 /* Done here again so that even if phantom sw overwrote it,
557 if (adapter->ops->macaddr_set)
558 adapter->ops->macaddr_set(port, netdev->dev_addr);
559 netxen_nic_set_link_parameters(port);
561 netxen_nic_set_multi(netdev);
562 if (!adapter->driver_mismatch)
563 netif_start_queue(netdev);
569 * netxen_nic_close - Disables a network interface entry point
571 static int netxen_nic_close(struct net_device *netdev)
573 struct netxen_port *port = netdev_priv(netdev);
574 struct netxen_adapter *adapter = port->adapter;
576 struct netxen_cmd_buffer *cmd_buff;
577 struct netxen_skb_frag *buffrag;
579 netif_carrier_off(netdev);
580 netif_stop_queue(netdev);
582 /* disable phy_ints */
583 if (adapter->ops->disable_phy_interrupts)
584 adapter->ops->disable_phy_interrupts(adapter, port->portnum);
586 adapter->active_ports--;
588 if (!adapter->active_ports) {
589 netxen_nic_disable_int(adapter);
591 free_irq(adapter->irq, adapter);
592 cmd_buff = adapter->cmd_buf_arr;
593 for (i = 0; i < adapter->max_tx_desc_count; i++) {
594 buffrag = cmd_buff->frag_array;
596 pci_unmap_single(port->pdev, buffrag->dma,
599 buffrag->dma = (u64) NULL;
601 for (j = 0; j < cmd_buff->frag_count; j++) {
604 pci_unmap_page(port->pdev,
608 buffrag->dma = (u64) NULL;
611 /* Free the skb we received in netxen_nic_xmit_frame */
613 dev_kfree_skb_any(cmd_buff->skb);
614 cmd_buff->skb = NULL;
618 del_timer_sync(&adapter->watchdog_timer);
624 static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
626 struct netxen_port *port = netdev_priv(netdev);
627 struct netxen_adapter *adapter = port->adapter;
628 struct netxen_hardware_context *hw = &adapter->ahw;
629 unsigned int first_seg_len = skb->len - skb->data_len;
630 struct netxen_skb_frag *buffrag;
634 u32 saved_producer = 0;
635 struct cmd_desc_type0 *hwdesc;
637 struct netxen_cmd_buffer *pbuf = NULL;
638 unsigned int tries = 0;
639 static int dropped_packet = 0;
641 u32 local_producer = 0;
642 u32 max_tx_desc_count = 0;
643 u32 last_cmd_consumer = 0;
646 port->stats.xmitcalled++;
647 frag_count = skb_shinfo(skb)->nr_frags + 1;
649 if (unlikely(skb->len <= 0)) {
650 dev_kfree_skb_any(skb);
651 port->stats.badskblen++;
655 if (frag_count > MAX_BUFFERS_PER_CMD) {
656 printk("%s: %s netxen_nic_xmit_frame: frag_count (%d)"
657 "too large, can handle only %d frags\n",
658 netxen_nic_driver_name, netdev->name,
659 frag_count, MAX_BUFFERS_PER_CMD);
660 port->stats.txdropped++;
661 if ((++dropped_packet & 0xff) == 0xff)
662 printk("%s: %s droppped packets = %d\n",
663 netxen_nic_driver_name, netdev->name,
670 * Everything is set up. Now, we just need to transmit it out.
671 * Note that we have to copy the contents of buffer over to
672 * right place. Later on, this can be optimized out by de-coupling the
673 * producer index from the buffer index.
675 retry_getting_window:
676 spin_lock_bh(&adapter->tx_lock);
677 if (adapter->total_threads == MAX_XMIT_PRODUCERS) {
678 spin_unlock_bh(&adapter->tx_lock);
685 for (i = 0; i < 20; i++)
686 cpu_relax(); /*This a nop instr on i386 */
688 goto retry_getting_window;
690 local_producer = adapter->cmd_producer;
691 /* There 4 fragments per descriptor */
692 no_of_desc = (frag_count + 3) >> 2;
693 if (skb_shinfo(skb)->gso_size > 0) {
695 if (((skb->nh.iph)->ihl * sizeof(u32)) +
696 ((skb->h.th)->doff * sizeof(u32)) +
697 sizeof(struct ethhdr) >
698 (sizeof(struct cmd_desc_type0) - NET_IP_ALIGN)) {
702 k = adapter->cmd_producer;
703 max_tx_desc_count = adapter->max_tx_desc_count;
704 last_cmd_consumer = adapter->last_cmd_consumer;
705 if ((k + no_of_desc) >=
706 ((last_cmd_consumer <= k) ? last_cmd_consumer + max_tx_desc_count :
707 last_cmd_consumer)) {
708 spin_unlock_bh(&adapter->tx_lock);
711 netxen_process_cmd_ring((unsigned long)adapter);
714 goto retry_getting_window;
716 port->stats.nocmddescriptor++;
717 DPRINTK(ERR, "No command descriptors available,"
718 " producer = %d, consumer = %d count=%llu,"
719 " dropping packet\n", producer,
720 adapter->last_cmd_consumer,
721 port->stats.nocmddescriptor);
723 spin_lock_bh(&adapter->tx_lock);
724 netif_stop_queue(netdev);
725 port->flags |= NETXEN_NETDEV_STATUS;
726 spin_unlock_bh(&adapter->tx_lock);
727 return NETDEV_TX_BUSY;
730 k = get_index_range(k, max_tx_desc_count, no_of_desc);
731 adapter->cmd_producer = k;
732 adapter->total_threads++;
733 adapter->num_threads++;
735 spin_unlock_bh(&adapter->tx_lock);
736 /* Copy the descriptors into the hardware */
737 producer = local_producer;
738 saved_producer = producer;
739 hwdesc = &hw->cmd_desc_head[producer];
740 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
741 /* Take skb->data itself */
742 pbuf = &adapter->cmd_buf_arr[producer];
743 if (skb_shinfo(skb)->gso_size > 0) {
744 pbuf->mss = skb_shinfo(skb)->gso_size;
745 hwdesc->mss = skb_shinfo(skb)->gso_size;
750 pbuf->no_of_descriptors = no_of_desc;
751 pbuf->total_length = skb->len;
753 pbuf->cmd = TX_ETHER_PKT;
754 pbuf->frag_count = frag_count;
755 pbuf->port = port->portnum;
756 buffrag = &pbuf->frag_array[0];
757 buffrag->dma = pci_map_single(port->pdev, skb->data, first_seg_len,
759 buffrag->length = first_seg_len;
760 CMD_DESC_TOTAL_LENGTH_WRT(hwdesc, skb->len);
761 hwdesc->num_of_buffers = frag_count;
762 hwdesc->opcode = TX_ETHER_PKT;
764 CMD_DESC_PORT_WRT(hwdesc, port->portnum);
765 hwdesc->buffer1_length = cpu_to_le16(first_seg_len);
766 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
768 for (i = 1, k = 1; i < frag_count; i++, k++) {
769 struct skb_frag_struct *frag;
771 unsigned long offset;
774 /* move to next desc. if there is a need */
775 if ((i & 0x3) == 0) {
777 producer = get_next_index(producer,
778 adapter->max_tx_desc_count);
779 hwdesc = &hw->cmd_desc_head[producer];
780 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
782 frag = &skb_shinfo(skb)->frags[i - 1];
784 offset = frag->page_offset;
787 temp_dma = pci_map_page(port->pdev, frag->page, offset,
788 len, PCI_DMA_TODEVICE);
791 buffrag->dma = temp_dma;
792 buffrag->length = temp_len;
794 DPRINTK(INFO, "for loop. i=%d k=%d\n", i, k);
797 hwdesc->buffer1_length = cpu_to_le16(temp_len);
798 hwdesc->addr_buffer1 = cpu_to_le64(temp_dma);
801 hwdesc->buffer2_length = cpu_to_le16(temp_len);
802 hwdesc->addr_buffer2 = cpu_to_le64(temp_dma);
805 hwdesc->buffer3_length = cpu_to_le16(temp_len);
806 hwdesc->addr_buffer3 = cpu_to_le64(temp_dma);
809 hwdesc->buffer4_length = temp_len;
810 hwdesc->addr_buffer4 = cpu_to_le64(temp_dma);
815 producer = get_next_index(producer, adapter->max_tx_desc_count);
817 /* might change opcode to TX_TCP_LSO */
818 netxen_tso_check(adapter, &hw->cmd_desc_head[saved_producer], skb);
820 /* For LSO, we need to copy the MAC/IP/TCP headers into
821 * the descriptor ring
823 if (hw->cmd_desc_head[saved_producer].opcode == TX_TCP_LSO) {
824 int hdr_len, first_hdr_len, more_hdr;
825 hdr_len = hw->cmd_desc_head[saved_producer].total_hdr_length;
826 if (hdr_len > (sizeof(struct cmd_desc_type0) - NET_IP_ALIGN)) {
828 sizeof(struct cmd_desc_type0) - NET_IP_ALIGN;
831 first_hdr_len = hdr_len;
834 /* copy the MAC/IP/TCP headers to the cmd descriptor list */
835 hwdesc = &hw->cmd_desc_head[producer];
837 /* copy the first 64 bytes */
838 memcpy(((void *)hwdesc) + NET_IP_ALIGN,
839 (void *)(skb->data), first_hdr_len);
840 producer = get_next_index(producer, max_tx_desc_count);
843 hwdesc = &hw->cmd_desc_head[producer];
844 /* copy the next 64 bytes - should be enough except
845 * for pathological case
847 memcpy((void *)hwdesc, (void *)(skb->data) +
848 first_hdr_len, hdr_len - first_hdr_len);
849 producer = get_next_index(producer, max_tx_desc_count);
852 spin_lock_bh(&adapter->tx_lock);
853 port->stats.txbytes +=
854 CMD_DESC_TOTAL_LENGTH(&hw->cmd_desc_head[saved_producer]);
855 /* Code to update the adapter considering how many producer threads
856 are currently working */
857 if ((--adapter->num_threads) == 0) {
858 /* This is the last thread */
859 u32 crb_producer = adapter->cmd_producer;
861 NETXEN_CRB_NORMALIZE(adapter, CRB_CMD_PRODUCER_OFFSET));
863 adapter->total_threads = 0;
865 u32 crb_producer = 0;
867 readl(NETXEN_CRB_NORMALIZE
868 (adapter, CRB_CMD_PRODUCER_OFFSET));
869 if (crb_producer == local_producer) {
870 crb_producer = get_index_range(crb_producer,
874 NETXEN_CRB_NORMALIZE(adapter,
875 CRB_CMD_PRODUCER_OFFSET));
880 port->stats.xmitfinished++;
881 spin_unlock_bh(&adapter->tx_lock);
883 netdev->trans_start = jiffies;
885 DPRINTK(INFO, "wrote CMD producer %x to phantom\n", producer);
887 DPRINTK(INFO, "Done. Send\n");
891 static void netxen_watchdog(unsigned long v)
893 struct netxen_adapter *adapter = (struct netxen_adapter *)v;
894 schedule_work(&adapter->watchdog_task);
897 static void netxen_tx_timeout(struct net_device *netdev)
899 struct netxen_port *port = (struct netxen_port *)netdev_priv(netdev);
900 struct netxen_adapter *adapter = port->adapter;
902 schedule_work(&adapter->tx_timeout_task);
905 static void netxen_tx_timeout_task(struct net_device *netdev)
907 struct netxen_port *port = (struct netxen_port *)netdev_priv(netdev);
910 printk(KERN_ERR "%s %s: transmit timeout, resetting.\n",
911 netxen_nic_driver_name, netdev->name);
913 spin_lock_irqsave(&port->adapter->lock, flags);
914 netxen_nic_close(netdev);
915 netxen_nic_open(netdev);
916 spin_unlock_irqrestore(&port->adapter->lock, flags);
917 netdev->trans_start = jiffies;
918 netif_wake_queue(netdev);
922 netxen_handle_int(struct netxen_adapter *adapter, struct net_device *netdev)
926 DPRINTK(INFO, "Entered handle ISR\n");
928 adapter->stats.ints++;
930 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
933 netxen_nic_disable_int(adapter);
934 /* Window = 0 or 1 */
936 writel(0xffffffff, (void __iomem *)
937 (adapter->ahw.pci_base + ISR_INT_TARGET_STATUS));
938 mask = readl((void __iomem *)
939 (adapter->ahw.pci_base + ISR_INT_VECTOR));
940 } while (((mask & 0x80) != 0) && (++count < 32));
941 if ((mask & 0x80) != 0)
942 printk("Could not disable interrupt completely\n");
945 adapter->stats.hostints++;
947 if (netxen_nic_rx_has_work(adapter) || netxen_nic_tx_has_work(adapter)) {
948 if (netif_rx_schedule_prep(netdev)) {
950 * Interrupts are already disabled.
952 __netif_rx_schedule(netdev);
954 static unsigned int intcount = 0;
955 if ((++intcount & 0xfff) == 0xfff)
957 "%s: %s interrupt %d while in poll\n",
958 netxen_nic_driver_name, netdev->name,
965 netxen_nic_enable_int(adapter);
972 * netxen_intr - Interrupt Handler
973 * @irq: interrupt number
974 * data points to adapter stucture (which may be handling more than 1 port
976 irqreturn_t netxen_intr(int irq, void *data)
978 struct netxen_adapter *adapter;
979 struct netxen_port *port;
980 struct net_device *netdev;
983 if (unlikely(!irq)) {
984 return IRQ_NONE; /* Not our interrupt */
987 adapter = (struct netxen_adapter *)data;
988 for (i = 0; i < adapter->ahw.max_ports; i++) {
989 port = adapter->port[i];
990 netdev = port->netdev;
992 /* process our status queue (for all 4 ports) */
993 netxen_handle_int(adapter, netdev);
999 static int netxen_nic_poll(struct net_device *netdev, int *budget)
1001 struct netxen_port *port = (struct netxen_port *)netdev_priv(netdev);
1002 struct netxen_adapter *adapter = port->adapter;
1003 int work_to_do = min(*budget, netdev->quota);
1008 DPRINTK(INFO, "polling for %d descriptors\n", *budget);
1009 port->stats.polled++;
1011 adapter->work_done = 0;
1012 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
1014 * Fairness issue. This will give undue weight to the
1015 * receive context 0.
1019 * To avoid starvation, we give each of our receivers,
1020 * a fraction of the quota. Sometimes, it might happen that we
1021 * have enough quota to process every packet, but since all the
1022 * packets are on one context, it gets only half of the quota,
1023 * and ends up not processing it.
1025 this_work_done = netxen_process_rcv_ring(adapter, ctx,
1028 adapter->work_done += this_work_done;
1031 netdev->quota -= adapter->work_done;
1032 *budget -= adapter->work_done;
1034 if (adapter->work_done >= work_to_do
1035 && netxen_nic_rx_has_work(adapter) != 0)
1038 netxen_process_cmd_ring((unsigned long)adapter);
1040 DPRINTK(INFO, "new work_done: %d work_to_do: %d\n",
1041 adapter->work_done, work_to_do);
1043 netif_rx_complete(netdev);
1044 netxen_nic_enable_int(adapter);
1050 #ifdef CONFIG_NET_POLL_CONTROLLER
1051 static void netxen_nic_poll_controller(struct net_device *netdev)
1053 struct netxen_port *port = netdev_priv(netdev);
1054 struct netxen_adapter *adapter = port->adapter;
1055 disable_irq(adapter->irq);
1056 netxen_intr(adapter->irq, adapter);
1057 enable_irq(adapter->irq);
1061 * netxen_nic_ioctl () We provide the tcl/phanmon support through these
1065 netxen_nic_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1068 struct netxen_port *port = netdev_priv(netdev);
1069 struct netxen_adapter *adapter = port->adapter;
1071 DPRINTK(INFO, "doing ioctl for %s\n", netdev->name);
1073 case NETXEN_NIC_CMD:
1074 err = netxen_nic_do_ioctl(adapter, (void *)ifr->ifr_data, port);
1077 case NETXEN_NIC_NAME:
1078 DPRINTK(INFO, "ioctl cmd for NetXen\n");
1079 if (ifr->ifr_data) {
1080 put_user(port->portnum, (u16 __user *) ifr->ifr_data);
1085 DPRINTK(INFO, "ioctl cmd %x not supported\n", cmd);
1093 static struct pci_driver netxen_driver = {
1094 .name = netxen_nic_driver_name,
1095 .id_table = netxen_pci_tbl,
1096 .probe = netxen_nic_probe,
1097 .remove = __devexit_p(netxen_nic_remove)
1100 /* Driver Registration on NetXen card */
1102 static int __init netxen_init_module(void)
1104 printk(KERN_INFO "%s \n", netxen_nic_driver_string);
1106 return pci_module_init(&netxen_driver);
1109 module_init(netxen_init_module);
1111 static void __exit netxen_exit_module(void)
1114 * Wait for some time to allow the dma to drain, if any.
1117 pci_unregister_driver(&netxen_driver);
1120 module_exit(netxen_exit_module);