1 /*******************************************************************************
3 Intel PRO/10GbE Linux driver
4 Copyright(c) 1999 - 2006 Intel Corporation.
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
23 Linux NICS <linux.nics@intel.com>
24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *******************************************************************************/
31 char ixgb_driver_name[] = "ixgb";
32 static char ixgb_driver_string[] = "Intel(R) PRO/10GbE Network Driver";
34 #ifndef CONFIG_IXGB_NAPI
37 #define DRIVERNAPI "-NAPI"
39 #define DRV_VERSION "1.0.126-k2"DRIVERNAPI
40 char ixgb_driver_version[] = DRV_VERSION;
41 static char ixgb_copyright[] = "Copyright (c) 1999-2006 Intel Corporation.";
43 /* ixgb_pci_tbl - PCI Device ID Table
45 * Wildcard entries (PCI_ANY_ID) should come last
46 * Last entry must be all 0s
48 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
49 * Class, Class Mask, private data (not used) }
51 static struct pci_device_id ixgb_pci_tbl[] = {
52 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX,
53 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
54 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_CX4,
55 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
56 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_SR,
57 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
58 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_LR,
59 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
61 /* required last entry */
65 MODULE_DEVICE_TABLE(pci, ixgb_pci_tbl);
67 /* Local Function Prototypes */
69 int ixgb_up(struct ixgb_adapter *adapter);
70 void ixgb_down(struct ixgb_adapter *adapter, boolean_t kill_watchdog);
71 void ixgb_reset(struct ixgb_adapter *adapter);
72 int ixgb_setup_tx_resources(struct ixgb_adapter *adapter);
73 int ixgb_setup_rx_resources(struct ixgb_adapter *adapter);
74 void ixgb_free_tx_resources(struct ixgb_adapter *adapter);
75 void ixgb_free_rx_resources(struct ixgb_adapter *adapter);
76 void ixgb_update_stats(struct ixgb_adapter *adapter);
78 static int ixgb_init_module(void);
79 static void ixgb_exit_module(void);
80 static int ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
81 static void __devexit ixgb_remove(struct pci_dev *pdev);
82 static int ixgb_sw_init(struct ixgb_adapter *adapter);
83 static int ixgb_open(struct net_device *netdev);
84 static int ixgb_close(struct net_device *netdev);
85 static void ixgb_configure_tx(struct ixgb_adapter *adapter);
86 static void ixgb_configure_rx(struct ixgb_adapter *adapter);
87 static void ixgb_setup_rctl(struct ixgb_adapter *adapter);
88 static void ixgb_clean_tx_ring(struct ixgb_adapter *adapter);
89 static void ixgb_clean_rx_ring(struct ixgb_adapter *adapter);
90 static void ixgb_set_multi(struct net_device *netdev);
91 static void ixgb_watchdog(unsigned long data);
92 static int ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
93 static struct net_device_stats *ixgb_get_stats(struct net_device *netdev);
94 static int ixgb_change_mtu(struct net_device *netdev, int new_mtu);
95 static int ixgb_set_mac(struct net_device *netdev, void *p);
96 static irqreturn_t ixgb_intr(int irq, void *data);
97 static boolean_t ixgb_clean_tx_irq(struct ixgb_adapter *adapter);
99 #ifdef CONFIG_IXGB_NAPI
100 static int ixgb_clean(struct napi_struct *napi, int budget);
101 static boolean_t ixgb_clean_rx_irq(struct ixgb_adapter *adapter,
102 int *work_done, int work_to_do);
104 static boolean_t ixgb_clean_rx_irq(struct ixgb_adapter *adapter);
106 static void ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter);
107 void ixgb_set_ethtool_ops(struct net_device *netdev);
108 static void ixgb_tx_timeout(struct net_device *dev);
109 static void ixgb_tx_timeout_task(struct work_struct *work);
110 static void ixgb_vlan_rx_register(struct net_device *netdev,
111 struct vlan_group *grp);
112 static void ixgb_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
113 static void ixgb_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
114 static void ixgb_restore_vlan(struct ixgb_adapter *adapter);
116 #ifdef CONFIG_NET_POLL_CONTROLLER
117 /* for netdump / net console */
118 static void ixgb_netpoll(struct net_device *dev);
121 static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev,
122 enum pci_channel_state state);
123 static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev);
124 static void ixgb_io_resume (struct pci_dev *pdev);
126 /* Exported from other modules */
127 extern void ixgb_check_options(struct ixgb_adapter *adapter);
129 static struct pci_error_handlers ixgb_err_handler = {
130 .error_detected = ixgb_io_error_detected,
131 .slot_reset = ixgb_io_slot_reset,
132 .resume = ixgb_io_resume,
135 static struct pci_driver ixgb_driver = {
136 .name = ixgb_driver_name,
137 .id_table = ixgb_pci_tbl,
139 .remove = __devexit_p(ixgb_remove),
140 .err_handler = &ixgb_err_handler
143 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
144 MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver");
145 MODULE_LICENSE("GPL");
146 MODULE_VERSION(DRV_VERSION);
148 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
149 static int debug = DEFAULT_DEBUG_LEVEL_SHIFT;
150 module_param(debug, int, 0);
151 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
153 /* some defines for controlling descriptor fetches in h/w */
154 #define RXDCTL_WTHRESH_DEFAULT 15 /* chip writes back at this many or RXT0 */
155 #define RXDCTL_PTHRESH_DEFAULT 0 /* chip considers prefech below
157 #define RXDCTL_HTHRESH_DEFAULT 0 /* chip will only prefetch if tail
158 * is pushed this many descriptors
162 * ixgb_init_module - Driver Registration Routine
164 * ixgb_init_module is the first routine called when the driver is
165 * loaded. All it does is register with the PCI subsystem.
169 ixgb_init_module(void)
171 printk(KERN_INFO "%s - version %s\n",
172 ixgb_driver_string, ixgb_driver_version);
174 printk(KERN_INFO "%s\n", ixgb_copyright);
176 return pci_register_driver(&ixgb_driver);
179 module_init(ixgb_init_module);
182 * ixgb_exit_module - Driver Exit Cleanup Routine
184 * ixgb_exit_module is called just before the driver is removed
189 ixgb_exit_module(void)
191 pci_unregister_driver(&ixgb_driver);
194 module_exit(ixgb_exit_module);
197 * ixgb_irq_disable - Mask off interrupt generation on the NIC
198 * @adapter: board private structure
202 ixgb_irq_disable(struct ixgb_adapter *adapter)
204 atomic_inc(&adapter->irq_sem);
205 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
206 IXGB_WRITE_FLUSH(&adapter->hw);
207 synchronize_irq(adapter->pdev->irq);
211 * ixgb_irq_enable - Enable default interrupt generation settings
212 * @adapter: board private structure
216 ixgb_irq_enable(struct ixgb_adapter *adapter)
218 if(atomic_dec_and_test(&adapter->irq_sem)) {
219 IXGB_WRITE_REG(&adapter->hw, IMS,
220 IXGB_INT_RXT0 | IXGB_INT_RXDMT0 | IXGB_INT_TXDW |
222 IXGB_WRITE_FLUSH(&adapter->hw);
227 ixgb_up(struct ixgb_adapter *adapter)
229 struct net_device *netdev = adapter->netdev;
230 int err, irq_flags = IRQF_SHARED;
231 int max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
232 struct ixgb_hw *hw = &adapter->hw;
234 /* hardware has been reset, we need to reload some things */
236 ixgb_rar_set(hw, netdev->dev_addr, 0);
237 ixgb_set_multi(netdev);
239 ixgb_restore_vlan(adapter);
241 ixgb_configure_tx(adapter);
242 ixgb_setup_rctl(adapter);
243 ixgb_configure_rx(adapter);
244 ixgb_alloc_rx_buffers(adapter);
246 /* disable interrupts and get the hardware into a known state */
247 IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff);
249 /* only enable MSI if bus is in PCI-X mode */
250 if (IXGB_READ_REG(&adapter->hw, STATUS) & IXGB_STATUS_PCIX_MODE) {
251 err = pci_enable_msi(adapter->pdev);
253 adapter->have_msi = 1;
256 /* proceed to try to request regular interrupt */
259 err = request_irq(adapter->pdev->irq, &ixgb_intr, irq_flags,
260 netdev->name, netdev);
262 if (adapter->have_msi)
263 pci_disable_msi(adapter->pdev);
265 "Unable to allocate interrupt Error: %d\n", err);
269 if((hw->max_frame_size != max_frame) ||
270 (hw->max_frame_size !=
271 (IXGB_READ_REG(hw, MFS) >> IXGB_MFS_SHIFT))) {
273 hw->max_frame_size = max_frame;
275 IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
277 if(hw->max_frame_size >
278 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
279 uint32_t ctrl0 = IXGB_READ_REG(hw, CTRL0);
281 if(!(ctrl0 & IXGB_CTRL0_JFE)) {
282 ctrl0 |= IXGB_CTRL0_JFE;
283 IXGB_WRITE_REG(hw, CTRL0, ctrl0);
288 mod_timer(&adapter->watchdog_timer, jiffies);
290 #ifdef CONFIG_IXGB_NAPI
291 napi_enable(&adapter->napi);
293 ixgb_irq_enable(adapter);
299 ixgb_down(struct ixgb_adapter *adapter, boolean_t kill_watchdog)
301 struct net_device *netdev = adapter->netdev;
303 ixgb_irq_disable(adapter);
304 free_irq(adapter->pdev->irq, netdev);
306 if (adapter->have_msi)
307 pci_disable_msi(adapter->pdev);
310 del_timer_sync(&adapter->watchdog_timer);
311 #ifdef CONFIG_IXGB_NAPI
312 napi_disable(&adapter->napi);
314 adapter->link_speed = 0;
315 adapter->link_duplex = 0;
316 netif_carrier_off(netdev);
317 netif_stop_queue(netdev);
320 ixgb_clean_tx_ring(adapter);
321 ixgb_clean_rx_ring(adapter);
325 ixgb_reset(struct ixgb_adapter *adapter)
328 ixgb_adapter_stop(&adapter->hw);
329 if(!ixgb_init_hw(&adapter->hw))
330 DPRINTK(PROBE, ERR, "ixgb_init_hw failed.\n");
334 * ixgb_probe - Device Initialization Routine
335 * @pdev: PCI device information struct
336 * @ent: entry in ixgb_pci_tbl
338 * Returns 0 on success, negative on failure
340 * ixgb_probe initializes an adapter identified by a pci_dev structure.
341 * The OS initialization, configuring of the adapter private structure,
342 * and a hardware reset occur.
346 ixgb_probe(struct pci_dev *pdev,
347 const struct pci_device_id *ent)
349 struct net_device *netdev = NULL;
350 struct ixgb_adapter *adapter;
351 static int cards_found = 0;
352 unsigned long mmio_start;
358 if((err = pci_enable_device(pdev)))
361 if(!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK)) &&
362 !(err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))) {
365 if((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) ||
366 (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))) {
368 "ixgb: No usable DMA configuration, aborting\n");
374 if((err = pci_request_regions(pdev, ixgb_driver_name)))
375 goto err_request_regions;
377 pci_set_master(pdev);
379 netdev = alloc_etherdev(sizeof(struct ixgb_adapter));
382 goto err_alloc_etherdev;
385 SET_MODULE_OWNER(netdev);
386 SET_NETDEV_DEV(netdev, &pdev->dev);
388 pci_set_drvdata(pdev, netdev);
389 adapter = netdev_priv(netdev);
390 adapter->netdev = netdev;
391 adapter->pdev = pdev;
392 adapter->hw.back = adapter;
393 adapter->msg_enable = netif_msg_init(debug, DEFAULT_DEBUG_LEVEL_SHIFT);
395 mmio_start = pci_resource_start(pdev, BAR_0);
396 mmio_len = pci_resource_len(pdev, BAR_0);
398 adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
399 if(!adapter->hw.hw_addr) {
404 for(i = BAR_1; i <= BAR_5; i++) {
405 if(pci_resource_len(pdev, i) == 0)
407 if(pci_resource_flags(pdev, i) & IORESOURCE_IO) {
408 adapter->hw.io_base = pci_resource_start(pdev, i);
413 netdev->open = &ixgb_open;
414 netdev->stop = &ixgb_close;
415 netdev->hard_start_xmit = &ixgb_xmit_frame;
416 netdev->get_stats = &ixgb_get_stats;
417 netdev->set_multicast_list = &ixgb_set_multi;
418 netdev->set_mac_address = &ixgb_set_mac;
419 netdev->change_mtu = &ixgb_change_mtu;
420 ixgb_set_ethtool_ops(netdev);
421 netdev->tx_timeout = &ixgb_tx_timeout;
422 netdev->watchdog_timeo = 5 * HZ;
423 #ifdef CONFIG_IXGB_NAPI
424 netif_napi_add(netdev, &adapter->napi, ixgb_clean, 64);
426 netdev->vlan_rx_register = ixgb_vlan_rx_register;
427 netdev->vlan_rx_add_vid = ixgb_vlan_rx_add_vid;
428 netdev->vlan_rx_kill_vid = ixgb_vlan_rx_kill_vid;
429 #ifdef CONFIG_NET_POLL_CONTROLLER
430 netdev->poll_controller = ixgb_netpoll;
433 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
434 netdev->mem_start = mmio_start;
435 netdev->mem_end = mmio_start + mmio_len;
436 netdev->base_addr = adapter->hw.io_base;
438 adapter->bd_number = cards_found;
439 adapter->link_speed = 0;
440 adapter->link_duplex = 0;
442 /* setup the private structure */
444 if((err = ixgb_sw_init(adapter)))
447 netdev->features = NETIF_F_SG |
451 NETIF_F_HW_VLAN_FILTER;
452 netdev->features |= NETIF_F_TSO;
454 netdev->features |= NETIF_F_LLTX;
458 netdev->features |= NETIF_F_HIGHDMA;
460 /* make sure the EEPROM is good */
462 if(!ixgb_validate_eeprom_checksum(&adapter->hw)) {
463 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
468 ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
469 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
471 if(!is_valid_ether_addr(netdev->perm_addr)) {
472 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
477 adapter->part_num = ixgb_get_ee_pba_number(&adapter->hw);
479 init_timer(&adapter->watchdog_timer);
480 adapter->watchdog_timer.function = &ixgb_watchdog;
481 adapter->watchdog_timer.data = (unsigned long)adapter;
483 INIT_WORK(&adapter->tx_timeout_task, ixgb_tx_timeout_task);
485 strcpy(netdev->name, "eth%d");
486 if((err = register_netdev(netdev)))
489 /* we're going to reset, so assume we have no link for now */
491 netif_carrier_off(netdev);
492 netif_stop_queue(netdev);
494 DPRINTK(PROBE, INFO, "Intel(R) PRO/10GbE Network Connection\n");
495 ixgb_check_options(adapter);
496 /* reset the hardware with the new settings */
506 iounmap(adapter->hw.hw_addr);
510 pci_release_regions(pdev);
513 pci_disable_device(pdev);
518 * ixgb_remove - Device Removal Routine
519 * @pdev: PCI device information struct
521 * ixgb_remove is called by the PCI subsystem to alert the driver
522 * that it should release a PCI device. The could be caused by a
523 * Hot-Plug event, or because the driver is going to be removed from
527 static void __devexit
528 ixgb_remove(struct pci_dev *pdev)
530 struct net_device *netdev = pci_get_drvdata(pdev);
531 struct ixgb_adapter *adapter = netdev_priv(netdev);
533 unregister_netdev(netdev);
535 iounmap(adapter->hw.hw_addr);
536 pci_release_regions(pdev);
542 * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter)
543 * @adapter: board private structure to initialize
545 * ixgb_sw_init initializes the Adapter private data structure.
546 * Fields are initialized based on PCI device information and
547 * OS network device settings (MTU size).
551 ixgb_sw_init(struct ixgb_adapter *adapter)
553 struct ixgb_hw *hw = &adapter->hw;
554 struct net_device *netdev = adapter->netdev;
555 struct pci_dev *pdev = adapter->pdev;
557 /* PCI config space info */
559 hw->vendor_id = pdev->vendor;
560 hw->device_id = pdev->device;
561 hw->subsystem_vendor_id = pdev->subsystem_vendor;
562 hw->subsystem_id = pdev->subsystem_device;
564 hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
565 adapter->rx_buffer_len = hw->max_frame_size;
567 if((hw->device_id == IXGB_DEVICE_ID_82597EX)
568 || (hw->device_id == IXGB_DEVICE_ID_82597EX_CX4)
569 || (hw->device_id == IXGB_DEVICE_ID_82597EX_LR)
570 || (hw->device_id == IXGB_DEVICE_ID_82597EX_SR))
571 hw->mac_type = ixgb_82597;
573 /* should never have loaded on this device */
574 DPRINTK(PROBE, ERR, "unsupported device id\n");
577 /* enable flow control to be programmed */
580 atomic_set(&adapter->irq_sem, 1);
581 spin_lock_init(&adapter->tx_lock);
587 * ixgb_open - Called when a network interface is made active
588 * @netdev: network interface device structure
590 * Returns 0 on success, negative value on failure
592 * The open entry point is called when a network interface is made
593 * active by the system (IFF_UP). At this point all resources needed
594 * for transmit and receive operations are allocated, the interrupt
595 * handler is registered with the OS, the watchdog timer is started,
596 * and the stack is notified that the interface is ready.
600 ixgb_open(struct net_device *netdev)
602 struct ixgb_adapter *adapter = netdev_priv(netdev);
605 /* allocate transmit descriptors */
607 if((err = ixgb_setup_tx_resources(adapter)))
610 /* allocate receive descriptors */
612 if((err = ixgb_setup_rx_resources(adapter)))
615 if((err = ixgb_up(adapter)))
621 ixgb_free_rx_resources(adapter);
623 ixgb_free_tx_resources(adapter);
631 * ixgb_close - Disables a network interface
632 * @netdev: network interface device structure
634 * Returns 0, this is not allowed to fail
636 * The close entry point is called when an interface is de-activated
637 * by the OS. The hardware is still under the drivers control, but
638 * needs to be disabled. A global MAC reset is issued to stop the
639 * hardware, and all transmit and receive resources are freed.
643 ixgb_close(struct net_device *netdev)
645 struct ixgb_adapter *adapter = netdev_priv(netdev);
647 ixgb_down(adapter, TRUE);
649 ixgb_free_tx_resources(adapter);
650 ixgb_free_rx_resources(adapter);
656 * ixgb_setup_tx_resources - allocate Tx resources (Descriptors)
657 * @adapter: board private structure
659 * Return 0 on success, negative on failure
663 ixgb_setup_tx_resources(struct ixgb_adapter *adapter)
665 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
666 struct pci_dev *pdev = adapter->pdev;
669 size = sizeof(struct ixgb_buffer) * txdr->count;
670 txdr->buffer_info = vmalloc(size);
671 if(!txdr->buffer_info) {
673 "Unable to allocate transmit descriptor ring memory\n");
676 memset(txdr->buffer_info, 0, size);
678 /* round up to nearest 4K */
680 txdr->size = txdr->count * sizeof(struct ixgb_tx_desc);
681 txdr->size = ALIGN(txdr->size, 4096);
683 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
685 vfree(txdr->buffer_info);
687 "Unable to allocate transmit descriptor memory\n");
690 memset(txdr->desc, 0, txdr->size);
692 txdr->next_to_use = 0;
693 txdr->next_to_clean = 0;
699 * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
700 * @adapter: board private structure
702 * Configure the Tx unit of the MAC after a reset.
706 ixgb_configure_tx(struct ixgb_adapter *adapter)
708 uint64_t tdba = adapter->tx_ring.dma;
709 uint32_t tdlen = adapter->tx_ring.count * sizeof(struct ixgb_tx_desc);
711 struct ixgb_hw *hw = &adapter->hw;
713 /* Setup the Base and Length of the Tx Descriptor Ring
714 * tx_ring.dma can be either a 32 or 64 bit value
717 IXGB_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
718 IXGB_WRITE_REG(hw, TDBAH, (tdba >> 32));
720 IXGB_WRITE_REG(hw, TDLEN, tdlen);
722 /* Setup the HW Tx Head and Tail descriptor pointers */
724 IXGB_WRITE_REG(hw, TDH, 0);
725 IXGB_WRITE_REG(hw, TDT, 0);
727 /* don't set up txdctl, it induces performance problems if configured
729 /* Set the Tx Interrupt Delay register */
731 IXGB_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
733 /* Program the Transmit Control Register */
735 tctl = IXGB_TCTL_TCE | IXGB_TCTL_TXEN | IXGB_TCTL_TPDE;
736 IXGB_WRITE_REG(hw, TCTL, tctl);
738 /* Setup Transmit Descriptor Settings for this adapter */
739 adapter->tx_cmd_type =
741 | (adapter->tx_int_delay_enable ? IXGB_TX_DESC_CMD_IDE : 0);
745 * ixgb_setup_rx_resources - allocate Rx resources (Descriptors)
746 * @adapter: board private structure
748 * Returns 0 on success, negative on failure
752 ixgb_setup_rx_resources(struct ixgb_adapter *adapter)
754 struct ixgb_desc_ring *rxdr = &adapter->rx_ring;
755 struct pci_dev *pdev = adapter->pdev;
758 size = sizeof(struct ixgb_buffer) * rxdr->count;
759 rxdr->buffer_info = vmalloc(size);
760 if(!rxdr->buffer_info) {
762 "Unable to allocate receive descriptor ring\n");
765 memset(rxdr->buffer_info, 0, size);
767 /* Round up to nearest 4K */
769 rxdr->size = rxdr->count * sizeof(struct ixgb_rx_desc);
770 rxdr->size = ALIGN(rxdr->size, 4096);
772 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
775 vfree(rxdr->buffer_info);
777 "Unable to allocate receive descriptors\n");
780 memset(rxdr->desc, 0, rxdr->size);
782 rxdr->next_to_clean = 0;
783 rxdr->next_to_use = 0;
789 * ixgb_setup_rctl - configure the receive control register
790 * @adapter: Board private structure
794 ixgb_setup_rctl(struct ixgb_adapter *adapter)
798 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
800 rctl &= ~(3 << IXGB_RCTL_MO_SHIFT);
803 IXGB_RCTL_BAM | IXGB_RCTL_RDMTS_1_2 |
804 IXGB_RCTL_RXEN | IXGB_RCTL_CFF |
805 (adapter->hw.mc_filter_type << IXGB_RCTL_MO_SHIFT);
807 rctl |= IXGB_RCTL_SECRC;
809 if (adapter->rx_buffer_len <= IXGB_RXBUFFER_2048)
810 rctl |= IXGB_RCTL_BSIZE_2048;
811 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_4096)
812 rctl |= IXGB_RCTL_BSIZE_4096;
813 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_8192)
814 rctl |= IXGB_RCTL_BSIZE_8192;
815 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_16384)
816 rctl |= IXGB_RCTL_BSIZE_16384;
818 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
822 * ixgb_configure_rx - Configure 82597 Receive Unit after Reset.
823 * @adapter: board private structure
825 * Configure the Rx unit of the MAC after a reset.
829 ixgb_configure_rx(struct ixgb_adapter *adapter)
831 uint64_t rdba = adapter->rx_ring.dma;
832 uint32_t rdlen = adapter->rx_ring.count * sizeof(struct ixgb_rx_desc);
833 struct ixgb_hw *hw = &adapter->hw;
838 /* make sure receives are disabled while setting up the descriptors */
840 rctl = IXGB_READ_REG(hw, RCTL);
841 IXGB_WRITE_REG(hw, RCTL, rctl & ~IXGB_RCTL_RXEN);
843 /* set the Receive Delay Timer Register */
845 IXGB_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
847 /* Setup the Base and Length of the Rx Descriptor Ring */
849 IXGB_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
850 IXGB_WRITE_REG(hw, RDBAH, (rdba >> 32));
852 IXGB_WRITE_REG(hw, RDLEN, rdlen);
854 /* Setup the HW Rx Head and Tail Descriptor Pointers */
855 IXGB_WRITE_REG(hw, RDH, 0);
856 IXGB_WRITE_REG(hw, RDT, 0);
858 /* set up pre-fetching of receive buffers so we get some before we
859 * run out (default hardware behavior is to run out before fetching
860 * more). This sets up to fetch if HTHRESH rx descriptors are avail
861 * and the descriptors in hw cache are below PTHRESH. This avoids
862 * the hardware behavior of fetching <=512 descriptors in a single
863 * burst that pre-empts all other activity, usually causing fifo
865 /* use WTHRESH to burst write 16 descriptors or burst when RXT0 */
866 rxdctl = RXDCTL_WTHRESH_DEFAULT << IXGB_RXDCTL_WTHRESH_SHIFT |
867 RXDCTL_HTHRESH_DEFAULT << IXGB_RXDCTL_HTHRESH_SHIFT |
868 RXDCTL_PTHRESH_DEFAULT << IXGB_RXDCTL_PTHRESH_SHIFT;
869 IXGB_WRITE_REG(hw, RXDCTL, rxdctl);
871 /* Enable Receive Checksum Offload for TCP and UDP */
872 if(adapter->rx_csum == TRUE) {
873 rxcsum = IXGB_READ_REG(hw, RXCSUM);
874 rxcsum |= IXGB_RXCSUM_TUOFL;
875 IXGB_WRITE_REG(hw, RXCSUM, rxcsum);
878 /* Enable Receives */
880 IXGB_WRITE_REG(hw, RCTL, rctl);
884 * ixgb_free_tx_resources - Free Tx Resources
885 * @adapter: board private structure
887 * Free all transmit software resources
891 ixgb_free_tx_resources(struct ixgb_adapter *adapter)
893 struct pci_dev *pdev = adapter->pdev;
895 ixgb_clean_tx_ring(adapter);
897 vfree(adapter->tx_ring.buffer_info);
898 adapter->tx_ring.buffer_info = NULL;
900 pci_free_consistent(pdev, adapter->tx_ring.size,
901 adapter->tx_ring.desc, adapter->tx_ring.dma);
903 adapter->tx_ring.desc = NULL;
907 ixgb_unmap_and_free_tx_resource(struct ixgb_adapter *adapter,
908 struct ixgb_buffer *buffer_info)
910 struct pci_dev *pdev = adapter->pdev;
912 if (buffer_info->dma)
913 pci_unmap_page(pdev, buffer_info->dma, buffer_info->length,
916 if (buffer_info->skb)
917 dev_kfree_skb_any(buffer_info->skb);
919 buffer_info->skb = NULL;
920 buffer_info->dma = 0;
921 buffer_info->time_stamp = 0;
922 /* these fields must always be initialized in tx
923 * buffer_info->length = 0;
924 * buffer_info->next_to_watch = 0; */
928 * ixgb_clean_tx_ring - Free Tx Buffers
929 * @adapter: board private structure
933 ixgb_clean_tx_ring(struct ixgb_adapter *adapter)
935 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
936 struct ixgb_buffer *buffer_info;
940 /* Free all the Tx ring sk_buffs */
942 for(i = 0; i < tx_ring->count; i++) {
943 buffer_info = &tx_ring->buffer_info[i];
944 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
947 size = sizeof(struct ixgb_buffer) * tx_ring->count;
948 memset(tx_ring->buffer_info, 0, size);
950 /* Zero out the descriptor ring */
952 memset(tx_ring->desc, 0, tx_ring->size);
954 tx_ring->next_to_use = 0;
955 tx_ring->next_to_clean = 0;
957 IXGB_WRITE_REG(&adapter->hw, TDH, 0);
958 IXGB_WRITE_REG(&adapter->hw, TDT, 0);
962 * ixgb_free_rx_resources - Free Rx Resources
963 * @adapter: board private structure
965 * Free all receive software resources
969 ixgb_free_rx_resources(struct ixgb_adapter *adapter)
971 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
972 struct pci_dev *pdev = adapter->pdev;
974 ixgb_clean_rx_ring(adapter);
976 vfree(rx_ring->buffer_info);
977 rx_ring->buffer_info = NULL;
979 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
981 rx_ring->desc = NULL;
985 * ixgb_clean_rx_ring - Free Rx Buffers
986 * @adapter: board private structure
990 ixgb_clean_rx_ring(struct ixgb_adapter *adapter)
992 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
993 struct ixgb_buffer *buffer_info;
994 struct pci_dev *pdev = adapter->pdev;
998 /* Free all the Rx ring sk_buffs */
1000 for(i = 0; i < rx_ring->count; i++) {
1001 buffer_info = &rx_ring->buffer_info[i];
1002 if(buffer_info->skb) {
1004 pci_unmap_single(pdev,
1006 buffer_info->length,
1007 PCI_DMA_FROMDEVICE);
1009 dev_kfree_skb(buffer_info->skb);
1011 buffer_info->skb = NULL;
1015 size = sizeof(struct ixgb_buffer) * rx_ring->count;
1016 memset(rx_ring->buffer_info, 0, size);
1018 /* Zero out the descriptor ring */
1020 memset(rx_ring->desc, 0, rx_ring->size);
1022 rx_ring->next_to_clean = 0;
1023 rx_ring->next_to_use = 0;
1025 IXGB_WRITE_REG(&adapter->hw, RDH, 0);
1026 IXGB_WRITE_REG(&adapter->hw, RDT, 0);
1030 * ixgb_set_mac - Change the Ethernet Address of the NIC
1031 * @netdev: network interface device structure
1032 * @p: pointer to an address structure
1034 * Returns 0 on success, negative on failure
1038 ixgb_set_mac(struct net_device *netdev, void *p)
1040 struct ixgb_adapter *adapter = netdev_priv(netdev);
1041 struct sockaddr *addr = p;
1043 if(!is_valid_ether_addr(addr->sa_data))
1044 return -EADDRNOTAVAIL;
1046 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1048 ixgb_rar_set(&adapter->hw, addr->sa_data, 0);
1054 * ixgb_set_multi - Multicast and Promiscuous mode set
1055 * @netdev: network interface device structure
1057 * The set_multi entry point is called whenever the multicast address
1058 * list or the network interface flags are updated. This routine is
1059 * responsible for configuring the hardware for proper multicast,
1060 * promiscuous mode, and all-multi behavior.
1064 ixgb_set_multi(struct net_device *netdev)
1066 struct ixgb_adapter *adapter = netdev_priv(netdev);
1067 struct ixgb_hw *hw = &adapter->hw;
1068 struct dev_mc_list *mc_ptr;
1072 /* Check for Promiscuous and All Multicast modes */
1074 rctl = IXGB_READ_REG(hw, RCTL);
1076 if(netdev->flags & IFF_PROMISC) {
1077 rctl |= (IXGB_RCTL_UPE | IXGB_RCTL_MPE);
1078 } else if(netdev->flags & IFF_ALLMULTI) {
1079 rctl |= IXGB_RCTL_MPE;
1080 rctl &= ~IXGB_RCTL_UPE;
1082 rctl &= ~(IXGB_RCTL_UPE | IXGB_RCTL_MPE);
1085 if(netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES) {
1086 rctl |= IXGB_RCTL_MPE;
1087 IXGB_WRITE_REG(hw, RCTL, rctl);
1089 uint8_t mta[netdev->mc_count * IXGB_ETH_LENGTH_OF_ADDRESS];
1091 IXGB_WRITE_REG(hw, RCTL, rctl);
1093 for(i = 0, mc_ptr = netdev->mc_list; mc_ptr;
1094 i++, mc_ptr = mc_ptr->next)
1095 memcpy(&mta[i * IXGB_ETH_LENGTH_OF_ADDRESS],
1096 mc_ptr->dmi_addr, IXGB_ETH_LENGTH_OF_ADDRESS);
1098 ixgb_mc_addr_list_update(hw, mta, netdev->mc_count, 0);
1103 * ixgb_watchdog - Timer Call-back
1104 * @data: pointer to netdev cast into an unsigned long
1108 ixgb_watchdog(unsigned long data)
1110 struct ixgb_adapter *adapter = (struct ixgb_adapter *)data;
1111 struct net_device *netdev = adapter->netdev;
1112 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
1114 ixgb_check_for_link(&adapter->hw);
1116 if (ixgb_check_for_bad_link(&adapter->hw)) {
1117 /* force the reset path */
1118 netif_stop_queue(netdev);
1121 if(adapter->hw.link_up) {
1122 if(!netif_carrier_ok(netdev)) {
1124 "NIC Link is Up 10000 Mbps Full Duplex\n");
1125 adapter->link_speed = 10000;
1126 adapter->link_duplex = FULL_DUPLEX;
1127 netif_carrier_on(netdev);
1128 netif_wake_queue(netdev);
1131 if(netif_carrier_ok(netdev)) {
1132 adapter->link_speed = 0;
1133 adapter->link_duplex = 0;
1134 DPRINTK(LINK, INFO, "NIC Link is Down\n");
1135 netif_carrier_off(netdev);
1136 netif_stop_queue(netdev);
1141 ixgb_update_stats(adapter);
1143 if(!netif_carrier_ok(netdev)) {
1144 if(IXGB_DESC_UNUSED(txdr) + 1 < txdr->count) {
1145 /* We've lost link, so the controller stops DMA,
1146 * but we've got queued Tx work that's never going
1147 * to get done, so reset controller to flush Tx.
1148 * (Do the reset outside of interrupt context). */
1149 schedule_work(&adapter->tx_timeout_task);
1153 /* Force detection of hung controller every watchdog period */
1154 adapter->detect_tx_hung = TRUE;
1156 /* generate an interrupt to force clean up of any stragglers */
1157 IXGB_WRITE_REG(&adapter->hw, ICS, IXGB_INT_TXDW);
1159 /* Reset the timer */
1160 mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
1163 #define IXGB_TX_FLAGS_CSUM 0x00000001
1164 #define IXGB_TX_FLAGS_VLAN 0x00000002
1165 #define IXGB_TX_FLAGS_TSO 0x00000004
1168 ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb)
1170 struct ixgb_context_desc *context_desc;
1172 uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
1173 uint16_t ipcse, tucse, mss;
1176 if (likely(skb_is_gso(skb))) {
1177 struct ixgb_buffer *buffer_info;
1180 if (skb_header_cloned(skb)) {
1181 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1186 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1187 mss = skb_shinfo(skb)->gso_size;
1191 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1194 ipcss = skb_network_offset(skb);
1195 ipcso = (void *)&(iph->check) - (void *)skb->data;
1196 ipcse = skb_transport_offset(skb) - 1;
1197 tucss = skb_transport_offset(skb);
1198 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
1201 i = adapter->tx_ring.next_to_use;
1202 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
1203 buffer_info = &adapter->tx_ring.buffer_info[i];
1204 WARN_ON(buffer_info->dma != 0);
1206 context_desc->ipcss = ipcss;
1207 context_desc->ipcso = ipcso;
1208 context_desc->ipcse = cpu_to_le16(ipcse);
1209 context_desc->tucss = tucss;
1210 context_desc->tucso = tucso;
1211 context_desc->tucse = cpu_to_le16(tucse);
1212 context_desc->mss = cpu_to_le16(mss);
1213 context_desc->hdr_len = hdr_len;
1214 context_desc->status = 0;
1215 context_desc->cmd_type_len = cpu_to_le32(
1216 IXGB_CONTEXT_DESC_TYPE
1217 | IXGB_CONTEXT_DESC_CMD_TSE
1218 | IXGB_CONTEXT_DESC_CMD_IP
1219 | IXGB_CONTEXT_DESC_CMD_TCP
1220 | IXGB_CONTEXT_DESC_CMD_IDE
1221 | (skb->len - (hdr_len)));
1224 if(++i == adapter->tx_ring.count) i = 0;
1225 adapter->tx_ring.next_to_use = i;
1234 ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb)
1236 struct ixgb_context_desc *context_desc;
1240 if(likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1241 struct ixgb_buffer *buffer_info;
1242 css = skb_transport_offset(skb);
1243 cso = css + skb->csum_offset;
1245 i = adapter->tx_ring.next_to_use;
1246 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
1247 buffer_info = &adapter->tx_ring.buffer_info[i];
1248 WARN_ON(buffer_info->dma != 0);
1250 context_desc->tucss = css;
1251 context_desc->tucso = cso;
1252 context_desc->tucse = 0;
1253 /* zero out any previously existing data in one instruction */
1254 *(uint32_t *)&(context_desc->ipcss) = 0;
1255 context_desc->status = 0;
1256 context_desc->hdr_len = 0;
1257 context_desc->mss = 0;
1258 context_desc->cmd_type_len =
1259 cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
1260 | IXGB_TX_DESC_CMD_IDE);
1262 if(++i == adapter->tx_ring.count) i = 0;
1263 adapter->tx_ring.next_to_use = i;
1271 #define IXGB_MAX_TXD_PWR 14
1272 #define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR)
1275 ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
1278 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1279 struct ixgb_buffer *buffer_info;
1281 unsigned int offset = 0, size, count = 0, i;
1282 unsigned int mss = skb_shinfo(skb)->gso_size;
1284 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
1287 len -= skb->data_len;
1289 i = tx_ring->next_to_use;
1292 buffer_info = &tx_ring->buffer_info[i];
1293 size = min(len, IXGB_MAX_DATA_PER_TXD);
1294 /* Workaround for premature desc write-backs
1295 * in TSO mode. Append 4-byte sentinel desc */
1296 if (unlikely(mss && !nr_frags && size == len && size > 8))
1299 buffer_info->length = size;
1300 WARN_ON(buffer_info->dma != 0);
1302 pci_map_single(adapter->pdev,
1306 buffer_info->time_stamp = jiffies;
1307 buffer_info->next_to_watch = 0;
1312 if(++i == tx_ring->count) i = 0;
1315 for(f = 0; f < nr_frags; f++) {
1316 struct skb_frag_struct *frag;
1318 frag = &skb_shinfo(skb)->frags[f];
1323 buffer_info = &tx_ring->buffer_info[i];
1324 size = min(len, IXGB_MAX_DATA_PER_TXD);
1326 /* Workaround for premature desc write-backs
1327 * in TSO mode. Append 4-byte sentinel desc */
1328 if (unlikely(mss && !nr_frags && size == len
1332 buffer_info->length = size;
1334 pci_map_page(adapter->pdev,
1336 frag->page_offset + offset,
1339 buffer_info->time_stamp = jiffies;
1340 buffer_info->next_to_watch = 0;
1345 if(++i == tx_ring->count) i = 0;
1348 i = (i == 0) ? tx_ring->count - 1 : i - 1;
1349 tx_ring->buffer_info[i].skb = skb;
1350 tx_ring->buffer_info[first].next_to_watch = i;
1356 ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,int tx_flags)
1358 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1359 struct ixgb_tx_desc *tx_desc = NULL;
1360 struct ixgb_buffer *buffer_info;
1361 uint32_t cmd_type_len = adapter->tx_cmd_type;
1366 if(tx_flags & IXGB_TX_FLAGS_TSO) {
1367 cmd_type_len |= IXGB_TX_DESC_CMD_TSE;
1368 popts |= (IXGB_TX_DESC_POPTS_IXSM | IXGB_TX_DESC_POPTS_TXSM);
1371 if(tx_flags & IXGB_TX_FLAGS_CSUM)
1372 popts |= IXGB_TX_DESC_POPTS_TXSM;
1374 if(tx_flags & IXGB_TX_FLAGS_VLAN) {
1375 cmd_type_len |= IXGB_TX_DESC_CMD_VLE;
1378 i = tx_ring->next_to_use;
1381 buffer_info = &tx_ring->buffer_info[i];
1382 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1383 tx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
1384 tx_desc->cmd_type_len =
1385 cpu_to_le32(cmd_type_len | buffer_info->length);
1386 tx_desc->status = status;
1387 tx_desc->popts = popts;
1388 tx_desc->vlan = cpu_to_le16(vlan_id);
1390 if(++i == tx_ring->count) i = 0;
1393 tx_desc->cmd_type_len |= cpu_to_le32(IXGB_TX_DESC_CMD_EOP
1394 | IXGB_TX_DESC_CMD_RS );
1396 /* Force memory writes to complete before letting h/w
1397 * know there are new descriptors to fetch. (Only
1398 * applicable for weak-ordered memory model archs,
1399 * such as IA-64). */
1402 tx_ring->next_to_use = i;
1403 IXGB_WRITE_REG(&adapter->hw, TDT, i);
1406 static int __ixgb_maybe_stop_tx(struct net_device *netdev, int size)
1408 struct ixgb_adapter *adapter = netdev_priv(netdev);
1409 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1411 netif_stop_queue(netdev);
1412 /* Herbert's original patch had:
1413 * smp_mb__after_netif_stop_queue();
1414 * but since that doesn't exist yet, just open code it. */
1417 /* We need to check again in a case another CPU has just
1418 * made room available. */
1419 if (likely(IXGB_DESC_UNUSED(tx_ring) < size))
1423 netif_start_queue(netdev);
1424 ++adapter->restart_queue;
1428 static int ixgb_maybe_stop_tx(struct net_device *netdev,
1429 struct ixgb_desc_ring *tx_ring, int size)
1431 if (likely(IXGB_DESC_UNUSED(tx_ring) >= size))
1433 return __ixgb_maybe_stop_tx(netdev, size);
1437 /* Tx Descriptors needed, worst case */
1438 #define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
1439 (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
1440 #define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) /* skb->date */ + \
1441 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 /* for context */ \
1442 + 1 /* one more needed for sentinel TSO workaround */
1445 ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1447 struct ixgb_adapter *adapter = netdev_priv(netdev);
1449 unsigned int tx_flags = 0;
1450 unsigned long flags;
1455 dev_kfree_skb_any(skb);
1460 local_irq_save(flags);
1461 if (!spin_trylock(&adapter->tx_lock)) {
1462 /* Collision - tell upper layer to requeue */
1463 local_irq_restore(flags);
1464 return NETDEV_TX_LOCKED;
1467 spin_lock_irqsave(&adapter->tx_lock, flags);
1470 if (unlikely(ixgb_maybe_stop_tx(netdev, &adapter->tx_ring,
1472 netif_stop_queue(netdev);
1473 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1474 return NETDEV_TX_BUSY;
1477 #ifndef NETIF_F_LLTX
1478 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1481 if(adapter->vlgrp && vlan_tx_tag_present(skb)) {
1482 tx_flags |= IXGB_TX_FLAGS_VLAN;
1483 vlan_id = vlan_tx_tag_get(skb);
1486 first = adapter->tx_ring.next_to_use;
1488 tso = ixgb_tso(adapter, skb);
1490 dev_kfree_skb_any(skb);
1492 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1494 return NETDEV_TX_OK;
1498 tx_flags |= IXGB_TX_FLAGS_TSO;
1499 else if(ixgb_tx_csum(adapter, skb))
1500 tx_flags |= IXGB_TX_FLAGS_CSUM;
1502 ixgb_tx_queue(adapter, ixgb_tx_map(adapter, skb, first), vlan_id,
1505 netdev->trans_start = jiffies;
1508 /* Make sure there is space in the ring for the next send. */
1509 ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, DESC_NEEDED);
1511 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1514 return NETDEV_TX_OK;
1518 * ixgb_tx_timeout - Respond to a Tx Hang
1519 * @netdev: network interface device structure
1523 ixgb_tx_timeout(struct net_device *netdev)
1525 struct ixgb_adapter *adapter = netdev_priv(netdev);
1527 /* Do the reset outside of interrupt context */
1528 schedule_work(&adapter->tx_timeout_task);
1532 ixgb_tx_timeout_task(struct work_struct *work)
1534 struct ixgb_adapter *adapter =
1535 container_of(work, struct ixgb_adapter, tx_timeout_task);
1537 adapter->tx_timeout_count++;
1538 ixgb_down(adapter, TRUE);
1543 * ixgb_get_stats - Get System Network Statistics
1544 * @netdev: network interface device structure
1546 * Returns the address of the device statistics structure.
1547 * The statistics are actually updated from the timer callback.
1550 static struct net_device_stats *
1551 ixgb_get_stats(struct net_device *netdev)
1553 struct ixgb_adapter *adapter = netdev_priv(netdev);
1555 return &adapter->net_stats;
1559 * ixgb_change_mtu - Change the Maximum Transfer Unit
1560 * @netdev: network interface device structure
1561 * @new_mtu: new value for maximum frame size
1563 * Returns 0 on success, negative on failure
1567 ixgb_change_mtu(struct net_device *netdev, int new_mtu)
1569 struct ixgb_adapter *adapter = netdev_priv(netdev);
1570 int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1571 int old_max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1574 if((max_frame < IXGB_MIN_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH)
1575 || (max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) {
1576 DPRINTK(PROBE, ERR, "Invalid MTU setting %d\n", new_mtu);
1580 adapter->rx_buffer_len = max_frame;
1582 netdev->mtu = new_mtu;
1584 if ((old_max_frame != max_frame) && netif_running(netdev)) {
1585 ixgb_down(adapter, TRUE);
1593 * ixgb_update_stats - Update the board statistics counters.
1594 * @adapter: board private structure
1598 ixgb_update_stats(struct ixgb_adapter *adapter)
1600 struct net_device *netdev = adapter->netdev;
1601 struct pci_dev *pdev = adapter->pdev;
1603 /* Prevent stats update while adapter is being reset */
1604 if (pci_channel_offline(pdev))
1607 if((netdev->flags & IFF_PROMISC) || (netdev->flags & IFF_ALLMULTI) ||
1608 (netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES)) {
1609 u64 multi = IXGB_READ_REG(&adapter->hw, MPRCL);
1610 u32 bcast_l = IXGB_READ_REG(&adapter->hw, BPRCL);
1611 u32 bcast_h = IXGB_READ_REG(&adapter->hw, BPRCH);
1612 u64 bcast = ((u64)bcast_h << 32) | bcast_l;
1614 multi |= ((u64)IXGB_READ_REG(&adapter->hw, MPRCH) << 32);
1615 /* fix up multicast stats by removing broadcasts */
1619 adapter->stats.mprcl += (multi & 0xFFFFFFFF);
1620 adapter->stats.mprch += (multi >> 32);
1621 adapter->stats.bprcl += bcast_l;
1622 adapter->stats.bprch += bcast_h;
1624 adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL);
1625 adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH);
1626 adapter->stats.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL);
1627 adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH);
1629 adapter->stats.tprl += IXGB_READ_REG(&adapter->hw, TPRL);
1630 adapter->stats.tprh += IXGB_READ_REG(&adapter->hw, TPRH);
1631 adapter->stats.gprcl += IXGB_READ_REG(&adapter->hw, GPRCL);
1632 adapter->stats.gprch += IXGB_READ_REG(&adapter->hw, GPRCH);
1633 adapter->stats.uprcl += IXGB_READ_REG(&adapter->hw, UPRCL);
1634 adapter->stats.uprch += IXGB_READ_REG(&adapter->hw, UPRCH);
1635 adapter->stats.vprcl += IXGB_READ_REG(&adapter->hw, VPRCL);
1636 adapter->stats.vprch += IXGB_READ_REG(&adapter->hw, VPRCH);
1637 adapter->stats.jprcl += IXGB_READ_REG(&adapter->hw, JPRCL);
1638 adapter->stats.jprch += IXGB_READ_REG(&adapter->hw, JPRCH);
1639 adapter->stats.gorcl += IXGB_READ_REG(&adapter->hw, GORCL);
1640 adapter->stats.gorch += IXGB_READ_REG(&adapter->hw, GORCH);
1641 adapter->stats.torl += IXGB_READ_REG(&adapter->hw, TORL);
1642 adapter->stats.torh += IXGB_READ_REG(&adapter->hw, TORH);
1643 adapter->stats.rnbc += IXGB_READ_REG(&adapter->hw, RNBC);
1644 adapter->stats.ruc += IXGB_READ_REG(&adapter->hw, RUC);
1645 adapter->stats.roc += IXGB_READ_REG(&adapter->hw, ROC);
1646 adapter->stats.rlec += IXGB_READ_REG(&adapter->hw, RLEC);
1647 adapter->stats.crcerrs += IXGB_READ_REG(&adapter->hw, CRCERRS);
1648 adapter->stats.icbc += IXGB_READ_REG(&adapter->hw, ICBC);
1649 adapter->stats.ecbc += IXGB_READ_REG(&adapter->hw, ECBC);
1650 adapter->stats.mpc += IXGB_READ_REG(&adapter->hw, MPC);
1651 adapter->stats.tptl += IXGB_READ_REG(&adapter->hw, TPTL);
1652 adapter->stats.tpth += IXGB_READ_REG(&adapter->hw, TPTH);
1653 adapter->stats.gptcl += IXGB_READ_REG(&adapter->hw, GPTCL);
1654 adapter->stats.gptch += IXGB_READ_REG(&adapter->hw, GPTCH);
1655 adapter->stats.bptcl += IXGB_READ_REG(&adapter->hw, BPTCL);
1656 adapter->stats.bptch += IXGB_READ_REG(&adapter->hw, BPTCH);
1657 adapter->stats.mptcl += IXGB_READ_REG(&adapter->hw, MPTCL);
1658 adapter->stats.mptch += IXGB_READ_REG(&adapter->hw, MPTCH);
1659 adapter->stats.uptcl += IXGB_READ_REG(&adapter->hw, UPTCL);
1660 adapter->stats.uptch += IXGB_READ_REG(&adapter->hw, UPTCH);
1661 adapter->stats.vptcl += IXGB_READ_REG(&adapter->hw, VPTCL);
1662 adapter->stats.vptch += IXGB_READ_REG(&adapter->hw, VPTCH);
1663 adapter->stats.jptcl += IXGB_READ_REG(&adapter->hw, JPTCL);
1664 adapter->stats.jptch += IXGB_READ_REG(&adapter->hw, JPTCH);
1665 adapter->stats.gotcl += IXGB_READ_REG(&adapter->hw, GOTCL);
1666 adapter->stats.gotch += IXGB_READ_REG(&adapter->hw, GOTCH);
1667 adapter->stats.totl += IXGB_READ_REG(&adapter->hw, TOTL);
1668 adapter->stats.toth += IXGB_READ_REG(&adapter->hw, TOTH);
1669 adapter->stats.dc += IXGB_READ_REG(&adapter->hw, DC);
1670 adapter->stats.plt64c += IXGB_READ_REG(&adapter->hw, PLT64C);
1671 adapter->stats.tsctc += IXGB_READ_REG(&adapter->hw, TSCTC);
1672 adapter->stats.tsctfc += IXGB_READ_REG(&adapter->hw, TSCTFC);
1673 adapter->stats.ibic += IXGB_READ_REG(&adapter->hw, IBIC);
1674 adapter->stats.rfc += IXGB_READ_REG(&adapter->hw, RFC);
1675 adapter->stats.lfc += IXGB_READ_REG(&adapter->hw, LFC);
1676 adapter->stats.pfrc += IXGB_READ_REG(&adapter->hw, PFRC);
1677 adapter->stats.pftc += IXGB_READ_REG(&adapter->hw, PFTC);
1678 adapter->stats.mcfrc += IXGB_READ_REG(&adapter->hw, MCFRC);
1679 adapter->stats.mcftc += IXGB_READ_REG(&adapter->hw, MCFTC);
1680 adapter->stats.xonrxc += IXGB_READ_REG(&adapter->hw, XONRXC);
1681 adapter->stats.xontxc += IXGB_READ_REG(&adapter->hw, XONTXC);
1682 adapter->stats.xoffrxc += IXGB_READ_REG(&adapter->hw, XOFFRXC);
1683 adapter->stats.xofftxc += IXGB_READ_REG(&adapter->hw, XOFFTXC);
1684 adapter->stats.rjc += IXGB_READ_REG(&adapter->hw, RJC);
1686 /* Fill out the OS statistics structure */
1688 adapter->net_stats.rx_packets = adapter->stats.gprcl;
1689 adapter->net_stats.tx_packets = adapter->stats.gptcl;
1690 adapter->net_stats.rx_bytes = adapter->stats.gorcl;
1691 adapter->net_stats.tx_bytes = adapter->stats.gotcl;
1692 adapter->net_stats.multicast = adapter->stats.mprcl;
1693 adapter->net_stats.collisions = 0;
1695 /* ignore RLEC as it reports errors for padded (<64bytes) frames
1696 * with a length in the type/len field */
1697 adapter->net_stats.rx_errors =
1698 /* adapter->stats.rnbc + */ adapter->stats.crcerrs +
1699 adapter->stats.ruc +
1700 adapter->stats.roc /*+ adapter->stats.rlec */ +
1701 adapter->stats.icbc +
1702 adapter->stats.ecbc + adapter->stats.mpc;
1705 * adapter->net_stats.rx_length_errors = adapter->stats.rlec;
1708 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
1709 adapter->net_stats.rx_fifo_errors = adapter->stats.mpc;
1710 adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
1711 adapter->net_stats.rx_over_errors = adapter->stats.mpc;
1713 adapter->net_stats.tx_errors = 0;
1714 adapter->net_stats.rx_frame_errors = 0;
1715 adapter->net_stats.tx_aborted_errors = 0;
1716 adapter->net_stats.tx_carrier_errors = 0;
1717 adapter->net_stats.tx_fifo_errors = 0;
1718 adapter->net_stats.tx_heartbeat_errors = 0;
1719 adapter->net_stats.tx_window_errors = 0;
1722 #define IXGB_MAX_INTR 10
1724 * ixgb_intr - Interrupt Handler
1725 * @irq: interrupt number
1726 * @data: pointer to a network interface device structure
1730 ixgb_intr(int irq, void *data)
1732 struct net_device *netdev = data;
1733 struct ixgb_adapter *adapter = netdev_priv(netdev);
1734 struct ixgb_hw *hw = &adapter->hw;
1735 uint32_t icr = IXGB_READ_REG(hw, ICR);
1736 #ifndef CONFIG_IXGB_NAPI
1741 return IRQ_NONE; /* Not our interrupt */
1743 if(unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC))) {
1744 mod_timer(&adapter->watchdog_timer, jiffies);
1747 #ifdef CONFIG_IXGB_NAPI
1748 if (netif_rx_schedule_prep(netdev, &adapter->napi)) {
1750 /* Disable interrupts and register for poll. The flush
1751 of the posted write is intentionally left out.
1754 atomic_inc(&adapter->irq_sem);
1755 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
1756 __netif_rx_schedule(netdev, &adapter->napi);
1759 /* yes, that is actually a & and it is meant to make sure that
1760 * every pass through this for loop checks both receive and
1761 * transmit queues for completed descriptors, intended to
1762 * avoid starvation issues and assist tx/rx fairness. */
1763 for(i = 0; i < IXGB_MAX_INTR; i++)
1764 if(!ixgb_clean_rx_irq(adapter) &
1765 !ixgb_clean_tx_irq(adapter))
1771 #ifdef CONFIG_IXGB_NAPI
1773 * ixgb_clean - NAPI Rx polling callback
1774 * @adapter: board private structure
1778 ixgb_clean(struct napi_struct *napi, int budget)
1780 struct ixgb_adapter *adapter = container_of(napi, struct ixgb_adapter, napi);
1781 struct net_device *netdev = adapter->netdev;
1785 tx_cleaned = ixgb_clean_tx_irq(adapter);
1786 ixgb_clean_rx_irq(adapter, &work_done, budget);
1788 /* if no Tx and not enough Rx work done, exit the polling mode */
1789 if((!tx_cleaned && (work_done == 0)) || !netif_running(netdev)) {
1790 netif_rx_complete(netdev, napi);
1791 ixgb_irq_enable(adapter);
1799 * ixgb_clean_tx_irq - Reclaim resources after transmit completes
1800 * @adapter: board private structure
1804 ixgb_clean_tx_irq(struct ixgb_adapter *adapter)
1806 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1807 struct net_device *netdev = adapter->netdev;
1808 struct ixgb_tx_desc *tx_desc, *eop_desc;
1809 struct ixgb_buffer *buffer_info;
1810 unsigned int i, eop;
1811 boolean_t cleaned = FALSE;
1813 i = tx_ring->next_to_clean;
1814 eop = tx_ring->buffer_info[i].next_to_watch;
1815 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1817 while(eop_desc->status & IXGB_TX_DESC_STATUS_DD) {
1819 for(cleaned = FALSE; !cleaned; ) {
1820 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1821 buffer_info = &tx_ring->buffer_info[i];
1824 & (IXGB_TX_DESC_POPTS_TXSM |
1825 IXGB_TX_DESC_POPTS_IXSM))
1826 adapter->hw_csum_tx_good++;
1828 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
1830 *(uint32_t *)&(tx_desc->status) = 0;
1832 cleaned = (i == eop);
1833 if(++i == tx_ring->count) i = 0;
1836 eop = tx_ring->buffer_info[i].next_to_watch;
1837 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1840 tx_ring->next_to_clean = i;
1842 if (unlikely(netif_queue_stopped(netdev))) {
1843 spin_lock(&adapter->tx_lock);
1844 if (netif_queue_stopped(netdev) && netif_carrier_ok(netdev) &&
1845 (IXGB_DESC_UNUSED(tx_ring) >= DESC_NEEDED))
1846 netif_wake_queue(netdev);
1847 spin_unlock(&adapter->tx_lock);
1850 if(adapter->detect_tx_hung) {
1851 /* detect a transmit hang in hardware, this serializes the
1852 * check with the clearing of time_stamp and movement of i */
1853 adapter->detect_tx_hung = FALSE;
1854 if (tx_ring->buffer_info[eop].dma &&
1855 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + HZ)
1856 && !(IXGB_READ_REG(&adapter->hw, STATUS) &
1857 IXGB_STATUS_TXOFF)) {
1858 /* detected Tx unit hang */
1859 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
1862 " next_to_use <%x>\n"
1863 " next_to_clean <%x>\n"
1864 "buffer_info[next_to_clean]\n"
1865 " time_stamp <%lx>\n"
1866 " next_to_watch <%x>\n"
1868 " next_to_watch.status <%x>\n",
1869 IXGB_READ_REG(&adapter->hw, TDH),
1870 IXGB_READ_REG(&adapter->hw, TDT),
1871 tx_ring->next_to_use,
1872 tx_ring->next_to_clean,
1873 tx_ring->buffer_info[eop].time_stamp,
1877 netif_stop_queue(netdev);
1885 * ixgb_rx_checksum - Receive Checksum Offload for 82597.
1886 * @adapter: board private structure
1887 * @rx_desc: receive descriptor
1888 * @sk_buff: socket buffer with received data
1892 ixgb_rx_checksum(struct ixgb_adapter *adapter,
1893 struct ixgb_rx_desc *rx_desc,
1894 struct sk_buff *skb)
1896 /* Ignore Checksum bit is set OR
1897 * TCP Checksum has not been calculated
1899 if((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) ||
1900 (!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) {
1901 skb->ip_summed = CHECKSUM_NONE;
1905 /* At this point we know the hardware did the TCP checksum */
1906 /* now look at the TCP checksum error bit */
1907 if(rx_desc->errors & IXGB_RX_DESC_ERRORS_TCPE) {
1908 /* let the stack verify checksum errors */
1909 skb->ip_summed = CHECKSUM_NONE;
1910 adapter->hw_csum_rx_error++;
1912 /* TCP checksum is good */
1913 skb->ip_summed = CHECKSUM_UNNECESSARY;
1914 adapter->hw_csum_rx_good++;
1919 * ixgb_clean_rx_irq - Send received data up the network stack,
1920 * @adapter: board private structure
1924 #ifdef CONFIG_IXGB_NAPI
1925 ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do)
1927 ixgb_clean_rx_irq(struct ixgb_adapter *adapter)
1930 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
1931 struct net_device *netdev = adapter->netdev;
1932 struct pci_dev *pdev = adapter->pdev;
1933 struct ixgb_rx_desc *rx_desc, *next_rxd;
1934 struct ixgb_buffer *buffer_info, *next_buffer, *next2_buffer;
1937 boolean_t cleaned = FALSE;
1939 i = rx_ring->next_to_clean;
1940 rx_desc = IXGB_RX_DESC(*rx_ring, i);
1941 buffer_info = &rx_ring->buffer_info[i];
1943 while(rx_desc->status & IXGB_RX_DESC_STATUS_DD) {
1944 struct sk_buff *skb, *next_skb;
1947 #ifdef CONFIG_IXGB_NAPI
1948 if(*work_done >= work_to_do)
1953 status = rx_desc->status;
1954 skb = buffer_info->skb;
1955 buffer_info->skb = NULL;
1957 prefetch(skb->data);
1959 if(++i == rx_ring->count) i = 0;
1960 next_rxd = IXGB_RX_DESC(*rx_ring, i);
1963 if((j = i + 1) == rx_ring->count) j = 0;
1964 next2_buffer = &rx_ring->buffer_info[j];
1965 prefetch(next2_buffer);
1967 next_buffer = &rx_ring->buffer_info[i];
1968 next_skb = next_buffer->skb;
1973 pci_unmap_single(pdev,
1975 buffer_info->length,
1976 PCI_DMA_FROMDEVICE);
1978 length = le16_to_cpu(rx_desc->length);
1980 if(unlikely(!(status & IXGB_RX_DESC_STATUS_EOP))) {
1982 /* All receives must fit into a single buffer */
1984 IXGB_DBG("Receive packet consumed multiple buffers "
1985 "length<%x>\n", length);
1987 dev_kfree_skb_irq(skb);
1991 if (unlikely(rx_desc->errors
1992 & (IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE
1993 | IXGB_RX_DESC_ERRORS_P |
1994 IXGB_RX_DESC_ERRORS_RXE))) {
1996 dev_kfree_skb_irq(skb);
2000 /* code added for copybreak, this should improve
2001 * performance for small packets with large amounts
2002 * of reassembly being done in the stack */
2003 #define IXGB_CB_LENGTH 256
2004 if (length < IXGB_CB_LENGTH) {
2005 struct sk_buff *new_skb =
2006 netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
2008 skb_reserve(new_skb, NET_IP_ALIGN);
2009 skb_copy_to_linear_data_offset(new_skb,
2015 /* save the skb in buffer_info as good */
2016 buffer_info->skb = skb;
2020 /* end copybreak code */
2023 skb_put(skb, length);
2025 /* Receive Checksum Offload */
2026 ixgb_rx_checksum(adapter, rx_desc, skb);
2028 skb->protocol = eth_type_trans(skb, netdev);
2029 #ifdef CONFIG_IXGB_NAPI
2030 if(adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) {
2031 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
2032 le16_to_cpu(rx_desc->special) &
2033 IXGB_RX_DESC_SPECIAL_VLAN_MASK);
2035 netif_receive_skb(skb);
2037 #else /* CONFIG_IXGB_NAPI */
2038 if(adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) {
2039 vlan_hwaccel_rx(skb, adapter->vlgrp,
2040 le16_to_cpu(rx_desc->special) &
2041 IXGB_RX_DESC_SPECIAL_VLAN_MASK);
2045 #endif /* CONFIG_IXGB_NAPI */
2046 netdev->last_rx = jiffies;
2049 /* clean up descriptor, might be written over by hw */
2050 rx_desc->status = 0;
2052 /* use prefetched values */
2054 buffer_info = next_buffer;
2057 rx_ring->next_to_clean = i;
2059 ixgb_alloc_rx_buffers(adapter);
2065 * ixgb_alloc_rx_buffers - Replace used receive buffers
2066 * @adapter: address of board private structure
2070 ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter)
2072 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
2073 struct net_device *netdev = adapter->netdev;
2074 struct pci_dev *pdev = adapter->pdev;
2075 struct ixgb_rx_desc *rx_desc;
2076 struct ixgb_buffer *buffer_info;
2077 struct sk_buff *skb;
2079 int num_group_tail_writes;
2082 i = rx_ring->next_to_use;
2083 buffer_info = &rx_ring->buffer_info[i];
2084 cleancount = IXGB_DESC_UNUSED(rx_ring);
2086 num_group_tail_writes = IXGB_RX_BUFFER_WRITE;
2088 /* leave three descriptors unused */
2089 while(--cleancount > 2) {
2090 /* recycle! its good for you */
2091 skb = buffer_info->skb;
2097 skb = netdev_alloc_skb(netdev, adapter->rx_buffer_len
2099 if (unlikely(!skb)) {
2100 /* Better luck next round */
2101 adapter->alloc_rx_buff_failed++;
2105 /* Make buffer alignment 2 beyond a 16 byte boundary
2106 * this will result in a 16 byte aligned IP header after
2107 * the 14 byte MAC header is removed
2109 skb_reserve(skb, NET_IP_ALIGN);
2111 buffer_info->skb = skb;
2112 buffer_info->length = adapter->rx_buffer_len;
2114 buffer_info->dma = pci_map_single(pdev,
2116 adapter->rx_buffer_len,
2117 PCI_DMA_FROMDEVICE);
2119 rx_desc = IXGB_RX_DESC(*rx_ring, i);
2120 rx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
2121 /* guarantee DD bit not set now before h/w gets descriptor
2122 * this is the rest of the workaround for h/w double
2124 rx_desc->status = 0;
2127 if(++i == rx_ring->count) i = 0;
2128 buffer_info = &rx_ring->buffer_info[i];
2131 if (likely(rx_ring->next_to_use != i)) {
2132 rx_ring->next_to_use = i;
2133 if (unlikely(i-- == 0))
2134 i = (rx_ring->count - 1);
2136 /* Force memory writes to complete before letting h/w
2137 * know there are new descriptors to fetch. (Only
2138 * applicable for weak-ordered memory model archs, such
2141 IXGB_WRITE_REG(&adapter->hw, RDT, i);
2146 * ixgb_vlan_rx_register - enables or disables vlan tagging/stripping.
2148 * @param netdev network interface device structure
2149 * @param grp indicates to enable or disable tagging/stripping
2152 ixgb_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
2154 struct ixgb_adapter *adapter = netdev_priv(netdev);
2155 uint32_t ctrl, rctl;
2157 ixgb_irq_disable(adapter);
2158 adapter->vlgrp = grp;
2161 /* enable VLAN tag insert/strip */
2162 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2163 ctrl |= IXGB_CTRL0_VME;
2164 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2166 /* enable VLAN receive filtering */
2168 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
2169 rctl |= IXGB_RCTL_VFE;
2170 rctl &= ~IXGB_RCTL_CFIEN;
2171 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
2173 /* disable VLAN tag insert/strip */
2175 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2176 ctrl &= ~IXGB_CTRL0_VME;
2177 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2179 /* disable VLAN filtering */
2181 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
2182 rctl &= ~IXGB_RCTL_VFE;
2183 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
2186 ixgb_irq_enable(adapter);
2190 ixgb_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
2192 struct ixgb_adapter *adapter = netdev_priv(netdev);
2193 uint32_t vfta, index;
2195 /* add VID to filter table */
2197 index = (vid >> 5) & 0x7F;
2198 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2199 vfta |= (1 << (vid & 0x1F));
2200 ixgb_write_vfta(&adapter->hw, index, vfta);
2204 ixgb_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
2206 struct ixgb_adapter *adapter = netdev_priv(netdev);
2207 uint32_t vfta, index;
2209 ixgb_irq_disable(adapter);
2211 vlan_group_set_device(adapter->vlgrp, vid, NULL);
2213 ixgb_irq_enable(adapter);
2215 /* remove VID from filter table*/
2217 index = (vid >> 5) & 0x7F;
2218 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2219 vfta &= ~(1 << (vid & 0x1F));
2220 ixgb_write_vfta(&adapter->hw, index, vfta);
2224 ixgb_restore_vlan(struct ixgb_adapter *adapter)
2226 ixgb_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2228 if(adapter->vlgrp) {
2230 for(vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
2231 if(!vlan_group_get_device(adapter->vlgrp, vid))
2233 ixgb_vlan_rx_add_vid(adapter->netdev, vid);
2238 #ifdef CONFIG_NET_POLL_CONTROLLER
2240 * Polling 'interrupt' - used by things like netconsole to send skbs
2241 * without having to re-enable interrupts. It's not called while
2242 * the interrupt routine is executing.
2245 static void ixgb_netpoll(struct net_device *dev)
2247 struct ixgb_adapter *adapter = netdev_priv(dev);
2249 disable_irq(adapter->pdev->irq);
2250 ixgb_intr(adapter->pdev->irq, dev);
2251 enable_irq(adapter->pdev->irq);
2256 * ixgb_io_error_detected() - called when PCI error is detected
2257 * @pdev pointer to pci device with error
2258 * @state pci channel state after error
2260 * This callback is called by the PCI subsystem whenever
2261 * a PCI bus error is detected.
2263 static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev,
2264 enum pci_channel_state state)
2266 struct net_device *netdev = pci_get_drvdata(pdev);
2267 struct ixgb_adapter *adapter = netdev_priv(netdev);
2269 if(netif_running(netdev))
2270 ixgb_down(adapter, TRUE);
2272 pci_disable_device(pdev);
2274 /* Request a slot reset. */
2275 return PCI_ERS_RESULT_NEED_RESET;
2279 * ixgb_io_slot_reset - called after the pci bus has been reset.
2280 * @pdev pointer to pci device with error
2282 * This callback is called after the PCI buss has been reset.
2283 * Basically, this tries to restart the card from scratch.
2284 * This is a shortened version of the device probe/discovery code,
2285 * it resembles the first-half of the ixgb_probe() routine.
2287 static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev)
2289 struct net_device *netdev = pci_get_drvdata(pdev);
2290 struct ixgb_adapter *adapter = netdev_priv(netdev);
2292 if(pci_enable_device(pdev)) {
2293 DPRINTK(PROBE, ERR, "Cannot re-enable PCI device after reset.\n");
2294 return PCI_ERS_RESULT_DISCONNECT;
2297 /* Perform card reset only on one instance of the card */
2298 if (0 != PCI_FUNC (pdev->devfn))
2299 return PCI_ERS_RESULT_RECOVERED;
2301 pci_set_master(pdev);
2303 netif_carrier_off(netdev);
2304 netif_stop_queue(netdev);
2305 ixgb_reset(adapter);
2307 /* Make sure the EEPROM is good */
2308 if(!ixgb_validate_eeprom_checksum(&adapter->hw)) {
2309 DPRINTK(PROBE, ERR, "After reset, the EEPROM checksum is not valid.\n");
2310 return PCI_ERS_RESULT_DISCONNECT;
2312 ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
2313 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
2315 if(!is_valid_ether_addr(netdev->perm_addr)) {
2316 DPRINTK(PROBE, ERR, "After reset, invalid MAC address.\n");
2317 return PCI_ERS_RESULT_DISCONNECT;
2320 return PCI_ERS_RESULT_RECOVERED;
2324 * ixgb_io_resume - called when its OK to resume normal operations
2325 * @pdev pointer to pci device with error
2327 * The error recovery driver tells us that its OK to resume
2328 * normal operation. Implementation resembles the second-half
2329 * of the ixgb_probe() routine.
2331 static void ixgb_io_resume (struct pci_dev *pdev)
2333 struct net_device *netdev = pci_get_drvdata(pdev);
2334 struct ixgb_adapter *adapter = netdev_priv(netdev);
2336 pci_set_master(pdev);
2338 if(netif_running(netdev)) {
2339 if(ixgb_up(adapter)) {
2340 printk ("ixgb: can't bring device back up after reset\n");
2345 netif_device_attach(netdev);
2346 mod_timer(&adapter->watchdog_timer, jiffies);