1 /*******************************************************************************
3 Intel PRO/10GbE Linux driver
4 Copyright(c) 1999 - 2008 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 *******************************************************************************/
29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
31 #include <linux/prefetch.h>
34 char ixgb_driver_name[] = "ixgb";
35 static char ixgb_driver_string[] = "Intel(R) PRO/10GbE Network Driver";
37 #define DRIVERNAPI "-NAPI"
38 #define DRV_VERSION "1.0.135-k2" DRIVERNAPI
39 const char ixgb_driver_version[] = DRV_VERSION;
40 static const char ixgb_copyright[] = "Copyright (c) 1999-2008 Intel Corporation.";
42 #define IXGB_CB_LENGTH 256
43 static unsigned int copybreak __read_mostly = IXGB_CB_LENGTH;
44 module_param(copybreak, uint, 0644);
45 MODULE_PARM_DESC(copybreak,
46 "Maximum size of packet that is copied to a new buffer on receive");
48 /* ixgb_pci_tbl - PCI Device ID Table
50 * Wildcard entries (PCI_ANY_ID) should come last
51 * Last entry must be all 0s
53 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
54 * Class, Class Mask, private data (not used) }
56 static DEFINE_PCI_DEVICE_TABLE(ixgb_pci_tbl) = {
57 {PCI_VENDOR_ID_INTEL, IXGB_DEVICE_ID_82597EX,
58 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
59 {PCI_VENDOR_ID_INTEL, IXGB_DEVICE_ID_82597EX_CX4,
60 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
61 {PCI_VENDOR_ID_INTEL, IXGB_DEVICE_ID_82597EX_SR,
62 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
63 {PCI_VENDOR_ID_INTEL, IXGB_DEVICE_ID_82597EX_LR,
64 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
66 /* required last entry */
70 MODULE_DEVICE_TABLE(pci, ixgb_pci_tbl);
72 /* Local Function Prototypes */
73 static int ixgb_init_module(void);
74 static void ixgb_exit_module(void);
75 static int ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
76 static void ixgb_remove(struct pci_dev *pdev);
77 static int ixgb_sw_init(struct ixgb_adapter *adapter);
78 static int ixgb_open(struct net_device *netdev);
79 static int ixgb_close(struct net_device *netdev);
80 static void ixgb_configure_tx(struct ixgb_adapter *adapter);
81 static void ixgb_configure_rx(struct ixgb_adapter *adapter);
82 static void ixgb_setup_rctl(struct ixgb_adapter *adapter);
83 static void ixgb_clean_tx_ring(struct ixgb_adapter *adapter);
84 static void ixgb_clean_rx_ring(struct ixgb_adapter *adapter);
85 static void ixgb_set_multi(struct net_device *netdev);
86 static void ixgb_watchdog(unsigned long data);
87 static netdev_tx_t ixgb_xmit_frame(struct sk_buff *skb,
88 struct net_device *netdev);
89 static struct net_device_stats *ixgb_get_stats(struct net_device *netdev);
90 static int ixgb_change_mtu(struct net_device *netdev, int new_mtu);
91 static int ixgb_set_mac(struct net_device *netdev, void *p);
92 static irqreturn_t ixgb_intr(int irq, void *data);
93 static bool ixgb_clean_tx_irq(struct ixgb_adapter *adapter);
95 static int ixgb_clean(struct napi_struct *, int);
96 static bool ixgb_clean_rx_irq(struct ixgb_adapter *, int *, int);
97 static void ixgb_alloc_rx_buffers(struct ixgb_adapter *, int);
99 static void ixgb_tx_timeout(struct net_device *dev);
100 static void ixgb_tx_timeout_task(struct work_struct *work);
102 static void ixgb_vlan_strip_enable(struct ixgb_adapter *adapter);
103 static void ixgb_vlan_strip_disable(struct ixgb_adapter *adapter);
104 static int ixgb_vlan_rx_add_vid(struct net_device *netdev,
105 __be16 proto, u16 vid);
106 static int ixgb_vlan_rx_kill_vid(struct net_device *netdev,
107 __be16 proto, u16 vid);
108 static void ixgb_restore_vlan(struct ixgb_adapter *adapter);
110 #ifdef CONFIG_NET_POLL_CONTROLLER
111 /* for netdump / net console */
112 static void ixgb_netpoll(struct net_device *dev);
115 static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev,
116 enum pci_channel_state state);
117 static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev);
118 static void ixgb_io_resume (struct pci_dev *pdev);
120 static const struct pci_error_handlers ixgb_err_handler = {
121 .error_detected = ixgb_io_error_detected,
122 .slot_reset = ixgb_io_slot_reset,
123 .resume = ixgb_io_resume,
126 static struct pci_driver ixgb_driver = {
127 .name = ixgb_driver_name,
128 .id_table = ixgb_pci_tbl,
130 .remove = ixgb_remove,
131 .err_handler = &ixgb_err_handler
134 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
135 MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver");
136 MODULE_LICENSE("GPL");
137 MODULE_VERSION(DRV_VERSION);
139 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
140 static int debug = -1;
141 module_param(debug, int, 0);
142 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
145 * ixgb_init_module - Driver Registration Routine
147 * ixgb_init_module is the first routine called when the driver is
148 * loaded. All it does is register with the PCI subsystem.
152 ixgb_init_module(void)
154 pr_info("%s - version %s\n", ixgb_driver_string, ixgb_driver_version);
155 pr_info("%s\n", ixgb_copyright);
157 return pci_register_driver(&ixgb_driver);
160 module_init(ixgb_init_module);
163 * ixgb_exit_module - Driver Exit Cleanup Routine
165 * ixgb_exit_module is called just before the driver is removed
170 ixgb_exit_module(void)
172 pci_unregister_driver(&ixgb_driver);
175 module_exit(ixgb_exit_module);
178 * ixgb_irq_disable - Mask off interrupt generation on the NIC
179 * @adapter: board private structure
183 ixgb_irq_disable(struct ixgb_adapter *adapter)
185 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
186 IXGB_WRITE_FLUSH(&adapter->hw);
187 synchronize_irq(adapter->pdev->irq);
191 * ixgb_irq_enable - Enable default interrupt generation settings
192 * @adapter: board private structure
196 ixgb_irq_enable(struct ixgb_adapter *adapter)
198 u32 val = IXGB_INT_RXT0 | IXGB_INT_RXDMT0 |
199 IXGB_INT_TXDW | IXGB_INT_LSC;
200 if (adapter->hw.subsystem_vendor_id == PCI_VENDOR_ID_SUN)
201 val |= IXGB_INT_GPI0;
202 IXGB_WRITE_REG(&adapter->hw, IMS, val);
203 IXGB_WRITE_FLUSH(&adapter->hw);
207 ixgb_up(struct ixgb_adapter *adapter)
209 struct net_device *netdev = adapter->netdev;
210 int err, irq_flags = IRQF_SHARED;
211 int max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
212 struct ixgb_hw *hw = &adapter->hw;
214 /* hardware has been reset, we need to reload some things */
216 ixgb_rar_set(hw, netdev->dev_addr, 0);
217 ixgb_set_multi(netdev);
219 ixgb_restore_vlan(adapter);
221 ixgb_configure_tx(adapter);
222 ixgb_setup_rctl(adapter);
223 ixgb_configure_rx(adapter);
224 ixgb_alloc_rx_buffers(adapter, IXGB_DESC_UNUSED(&adapter->rx_ring));
226 /* disable interrupts and get the hardware into a known state */
227 IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff);
229 /* only enable MSI if bus is in PCI-X mode */
230 if (IXGB_READ_REG(&adapter->hw, STATUS) & IXGB_STATUS_PCIX_MODE) {
231 err = pci_enable_msi(adapter->pdev);
233 adapter->have_msi = true;
236 /* proceed to try to request regular interrupt */
239 err = request_irq(adapter->pdev->irq, ixgb_intr, irq_flags,
240 netdev->name, netdev);
242 if (adapter->have_msi)
243 pci_disable_msi(adapter->pdev);
244 netif_err(adapter, probe, adapter->netdev,
245 "Unable to allocate interrupt Error: %d\n", err);
249 if ((hw->max_frame_size != max_frame) ||
250 (hw->max_frame_size !=
251 (IXGB_READ_REG(hw, MFS) >> IXGB_MFS_SHIFT))) {
253 hw->max_frame_size = max_frame;
255 IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
257 if (hw->max_frame_size >
258 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
259 u32 ctrl0 = IXGB_READ_REG(hw, CTRL0);
261 if (!(ctrl0 & IXGB_CTRL0_JFE)) {
262 ctrl0 |= IXGB_CTRL0_JFE;
263 IXGB_WRITE_REG(hw, CTRL0, ctrl0);
268 clear_bit(__IXGB_DOWN, &adapter->flags);
270 napi_enable(&adapter->napi);
271 ixgb_irq_enable(adapter);
273 netif_wake_queue(netdev);
275 mod_timer(&adapter->watchdog_timer, jiffies);
281 ixgb_down(struct ixgb_adapter *adapter, bool kill_watchdog)
283 struct net_device *netdev = adapter->netdev;
285 /* prevent the interrupt handler from restarting watchdog */
286 set_bit(__IXGB_DOWN, &adapter->flags);
288 napi_disable(&adapter->napi);
289 /* waiting for NAPI to complete can re-enable interrupts */
290 ixgb_irq_disable(adapter);
291 free_irq(adapter->pdev->irq, netdev);
293 if (adapter->have_msi)
294 pci_disable_msi(adapter->pdev);
297 del_timer_sync(&adapter->watchdog_timer);
299 adapter->link_speed = 0;
300 adapter->link_duplex = 0;
301 netif_carrier_off(netdev);
302 netif_stop_queue(netdev);
305 ixgb_clean_tx_ring(adapter);
306 ixgb_clean_rx_ring(adapter);
310 ixgb_reset(struct ixgb_adapter *adapter)
312 struct ixgb_hw *hw = &adapter->hw;
314 ixgb_adapter_stop(hw);
315 if (!ixgb_init_hw(hw))
316 netif_err(adapter, probe, adapter->netdev, "ixgb_init_hw failed\n");
318 /* restore frame size information */
319 IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
320 if (hw->max_frame_size >
321 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
322 u32 ctrl0 = IXGB_READ_REG(hw, CTRL0);
323 if (!(ctrl0 & IXGB_CTRL0_JFE)) {
324 ctrl0 |= IXGB_CTRL0_JFE;
325 IXGB_WRITE_REG(hw, CTRL0, ctrl0);
330 static netdev_features_t
331 ixgb_fix_features(struct net_device *netdev, netdev_features_t features)
334 * Tx VLAN insertion does not work per HW design when Rx stripping is
337 if (!(features & NETIF_F_HW_VLAN_CTAG_RX))
338 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
344 ixgb_set_features(struct net_device *netdev, netdev_features_t features)
346 struct ixgb_adapter *adapter = netdev_priv(netdev);
347 netdev_features_t changed = features ^ netdev->features;
349 if (!(changed & (NETIF_F_RXCSUM|NETIF_F_HW_VLAN_CTAG_RX)))
352 adapter->rx_csum = !!(features & NETIF_F_RXCSUM);
354 if (netif_running(netdev)) {
355 ixgb_down(adapter, true);
357 ixgb_set_speed_duplex(netdev);
365 static const struct net_device_ops ixgb_netdev_ops = {
366 .ndo_open = ixgb_open,
367 .ndo_stop = ixgb_close,
368 .ndo_start_xmit = ixgb_xmit_frame,
369 .ndo_get_stats = ixgb_get_stats,
370 .ndo_set_rx_mode = ixgb_set_multi,
371 .ndo_validate_addr = eth_validate_addr,
372 .ndo_set_mac_address = ixgb_set_mac,
373 .ndo_change_mtu = ixgb_change_mtu,
374 .ndo_tx_timeout = ixgb_tx_timeout,
375 .ndo_vlan_rx_add_vid = ixgb_vlan_rx_add_vid,
376 .ndo_vlan_rx_kill_vid = ixgb_vlan_rx_kill_vid,
377 #ifdef CONFIG_NET_POLL_CONTROLLER
378 .ndo_poll_controller = ixgb_netpoll,
380 .ndo_fix_features = ixgb_fix_features,
381 .ndo_set_features = ixgb_set_features,
385 * ixgb_probe - Device Initialization Routine
386 * @pdev: PCI device information struct
387 * @ent: entry in ixgb_pci_tbl
389 * Returns 0 on success, negative on failure
391 * ixgb_probe initializes an adapter identified by a pci_dev structure.
392 * The OS initialization, configuring of the adapter private structure,
393 * and a hardware reset occur.
397 ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
399 struct net_device *netdev = NULL;
400 struct ixgb_adapter *adapter;
401 static int cards_found = 0;
406 err = pci_enable_device(pdev);
411 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
415 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
417 pr_err("No usable DMA configuration, aborting\n");
422 err = pci_request_regions(pdev, ixgb_driver_name);
424 goto err_request_regions;
426 pci_set_master(pdev);
428 netdev = alloc_etherdev(sizeof(struct ixgb_adapter));
431 goto err_alloc_etherdev;
434 SET_NETDEV_DEV(netdev, &pdev->dev);
436 pci_set_drvdata(pdev, netdev);
437 adapter = netdev_priv(netdev);
438 adapter->netdev = netdev;
439 adapter->pdev = pdev;
440 adapter->hw.back = adapter;
441 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
443 adapter->hw.hw_addr = pci_ioremap_bar(pdev, BAR_0);
444 if (!adapter->hw.hw_addr) {
449 for (i = BAR_1; i <= BAR_5; i++) {
450 if (pci_resource_len(pdev, i) == 0)
452 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
453 adapter->hw.io_base = pci_resource_start(pdev, i);
458 netdev->netdev_ops = &ixgb_netdev_ops;
459 ixgb_set_ethtool_ops(netdev);
460 netdev->watchdog_timeo = 5 * HZ;
461 netif_napi_add(netdev, &adapter->napi, ixgb_clean, 64);
463 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
465 adapter->bd_number = cards_found;
466 adapter->link_speed = 0;
467 adapter->link_duplex = 0;
469 /* setup the private structure */
471 err = ixgb_sw_init(adapter);
475 netdev->hw_features = NETIF_F_SG |
478 NETIF_F_HW_VLAN_CTAG_TX |
479 NETIF_F_HW_VLAN_CTAG_RX;
480 netdev->features = netdev->hw_features |
481 NETIF_F_HW_VLAN_CTAG_FILTER;
482 netdev->hw_features |= NETIF_F_RXCSUM;
485 netdev->features |= NETIF_F_HIGHDMA;
486 netdev->vlan_features |= NETIF_F_HIGHDMA;
489 /* make sure the EEPROM is good */
491 if (!ixgb_validate_eeprom_checksum(&adapter->hw)) {
492 netif_err(adapter, probe, adapter->netdev,
493 "The EEPROM Checksum Is Not Valid\n");
498 ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
500 if (!is_valid_ether_addr(netdev->dev_addr)) {
501 netif_err(adapter, probe, adapter->netdev, "Invalid MAC Address\n");
506 adapter->part_num = ixgb_get_ee_pba_number(&adapter->hw);
508 init_timer(&adapter->watchdog_timer);
509 adapter->watchdog_timer.function = ixgb_watchdog;
510 adapter->watchdog_timer.data = (unsigned long)adapter;
512 INIT_WORK(&adapter->tx_timeout_task, ixgb_tx_timeout_task);
514 strcpy(netdev->name, "eth%d");
515 err = register_netdev(netdev);
519 /* carrier off reporting is important to ethtool even BEFORE open */
520 netif_carrier_off(netdev);
522 netif_info(adapter, probe, adapter->netdev,
523 "Intel(R) PRO/10GbE Network Connection\n");
524 ixgb_check_options(adapter);
525 /* reset the hardware with the new settings */
535 iounmap(adapter->hw.hw_addr);
539 pci_release_regions(pdev);
542 pci_disable_device(pdev);
547 * ixgb_remove - Device Removal Routine
548 * @pdev: PCI device information struct
550 * ixgb_remove is called by the PCI subsystem to alert the driver
551 * that it should release a PCI device. The could be caused by a
552 * Hot-Plug event, or because the driver is going to be removed from
557 ixgb_remove(struct pci_dev *pdev)
559 struct net_device *netdev = pci_get_drvdata(pdev);
560 struct ixgb_adapter *adapter = netdev_priv(netdev);
562 cancel_work_sync(&adapter->tx_timeout_task);
564 unregister_netdev(netdev);
566 iounmap(adapter->hw.hw_addr);
567 pci_release_regions(pdev);
570 pci_disable_device(pdev);
574 * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter)
575 * @adapter: board private structure to initialize
577 * ixgb_sw_init initializes the Adapter private data structure.
578 * Fields are initialized based on PCI device information and
579 * OS network device settings (MTU size).
583 ixgb_sw_init(struct ixgb_adapter *adapter)
585 struct ixgb_hw *hw = &adapter->hw;
586 struct net_device *netdev = adapter->netdev;
587 struct pci_dev *pdev = adapter->pdev;
589 /* PCI config space info */
591 hw->vendor_id = pdev->vendor;
592 hw->device_id = pdev->device;
593 hw->subsystem_vendor_id = pdev->subsystem_vendor;
594 hw->subsystem_id = pdev->subsystem_device;
596 hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
597 adapter->rx_buffer_len = hw->max_frame_size + 8; /* + 8 for errata */
599 if ((hw->device_id == IXGB_DEVICE_ID_82597EX) ||
600 (hw->device_id == IXGB_DEVICE_ID_82597EX_CX4) ||
601 (hw->device_id == IXGB_DEVICE_ID_82597EX_LR) ||
602 (hw->device_id == IXGB_DEVICE_ID_82597EX_SR))
603 hw->mac_type = ixgb_82597;
605 /* should never have loaded on this device */
606 netif_err(adapter, probe, adapter->netdev, "unsupported device id\n");
609 /* enable flow control to be programmed */
612 set_bit(__IXGB_DOWN, &adapter->flags);
617 * ixgb_open - Called when a network interface is made active
618 * @netdev: network interface device structure
620 * Returns 0 on success, negative value on failure
622 * The open entry point is called when a network interface is made
623 * active by the system (IFF_UP). At this point all resources needed
624 * for transmit and receive operations are allocated, the interrupt
625 * handler is registered with the OS, the watchdog timer is started,
626 * and the stack is notified that the interface is ready.
630 ixgb_open(struct net_device *netdev)
632 struct ixgb_adapter *adapter = netdev_priv(netdev);
635 /* allocate transmit descriptors */
636 err = ixgb_setup_tx_resources(adapter);
640 netif_carrier_off(netdev);
642 /* allocate receive descriptors */
644 err = ixgb_setup_rx_resources(adapter);
648 err = ixgb_up(adapter);
652 netif_start_queue(netdev);
657 ixgb_free_rx_resources(adapter);
659 ixgb_free_tx_resources(adapter);
667 * ixgb_close - Disables a network interface
668 * @netdev: network interface device structure
670 * Returns 0, this is not allowed to fail
672 * The close entry point is called when an interface is de-activated
673 * by the OS. The hardware is still under the drivers control, but
674 * needs to be disabled. A global MAC reset is issued to stop the
675 * hardware, and all transmit and receive resources are freed.
679 ixgb_close(struct net_device *netdev)
681 struct ixgb_adapter *adapter = netdev_priv(netdev);
683 ixgb_down(adapter, true);
685 ixgb_free_tx_resources(adapter);
686 ixgb_free_rx_resources(adapter);
692 * ixgb_setup_tx_resources - allocate Tx resources (Descriptors)
693 * @adapter: board private structure
695 * Return 0 on success, negative on failure
699 ixgb_setup_tx_resources(struct ixgb_adapter *adapter)
701 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
702 struct pci_dev *pdev = adapter->pdev;
705 size = sizeof(struct ixgb_buffer) * txdr->count;
706 txdr->buffer_info = vzalloc(size);
707 if (!txdr->buffer_info)
710 /* round up to nearest 4K */
712 txdr->size = txdr->count * sizeof(struct ixgb_tx_desc);
713 txdr->size = ALIGN(txdr->size, 4096);
715 txdr->desc = dma_zalloc_coherent(&pdev->dev, txdr->size, &txdr->dma,
718 vfree(txdr->buffer_info);
722 txdr->next_to_use = 0;
723 txdr->next_to_clean = 0;
729 * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
730 * @adapter: board private structure
732 * Configure the Tx unit of the MAC after a reset.
736 ixgb_configure_tx(struct ixgb_adapter *adapter)
738 u64 tdba = adapter->tx_ring.dma;
739 u32 tdlen = adapter->tx_ring.count * sizeof(struct ixgb_tx_desc);
741 struct ixgb_hw *hw = &adapter->hw;
743 /* Setup the Base and Length of the Tx Descriptor Ring
744 * tx_ring.dma can be either a 32 or 64 bit value
747 IXGB_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
748 IXGB_WRITE_REG(hw, TDBAH, (tdba >> 32));
750 IXGB_WRITE_REG(hw, TDLEN, tdlen);
752 /* Setup the HW Tx Head and Tail descriptor pointers */
754 IXGB_WRITE_REG(hw, TDH, 0);
755 IXGB_WRITE_REG(hw, TDT, 0);
757 /* don't set up txdctl, it induces performance problems if configured
759 /* Set the Tx Interrupt Delay register */
761 IXGB_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
763 /* Program the Transmit Control Register */
765 tctl = IXGB_TCTL_TCE | IXGB_TCTL_TXEN | IXGB_TCTL_TPDE;
766 IXGB_WRITE_REG(hw, TCTL, tctl);
768 /* Setup Transmit Descriptor Settings for this adapter */
769 adapter->tx_cmd_type =
771 (adapter->tx_int_delay_enable ? IXGB_TX_DESC_CMD_IDE : 0);
775 * ixgb_setup_rx_resources - allocate Rx resources (Descriptors)
776 * @adapter: board private structure
778 * Returns 0 on success, negative on failure
782 ixgb_setup_rx_resources(struct ixgb_adapter *adapter)
784 struct ixgb_desc_ring *rxdr = &adapter->rx_ring;
785 struct pci_dev *pdev = adapter->pdev;
788 size = sizeof(struct ixgb_buffer) * rxdr->count;
789 rxdr->buffer_info = vzalloc(size);
790 if (!rxdr->buffer_info)
793 /* Round up to nearest 4K */
795 rxdr->size = rxdr->count * sizeof(struct ixgb_rx_desc);
796 rxdr->size = ALIGN(rxdr->size, 4096);
798 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma,
802 vfree(rxdr->buffer_info);
805 memset(rxdr->desc, 0, rxdr->size);
807 rxdr->next_to_clean = 0;
808 rxdr->next_to_use = 0;
814 * ixgb_setup_rctl - configure the receive control register
815 * @adapter: Board private structure
819 ixgb_setup_rctl(struct ixgb_adapter *adapter)
823 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
825 rctl &= ~(3 << IXGB_RCTL_MO_SHIFT);
828 IXGB_RCTL_BAM | IXGB_RCTL_RDMTS_1_2 |
829 IXGB_RCTL_RXEN | IXGB_RCTL_CFF |
830 (adapter->hw.mc_filter_type << IXGB_RCTL_MO_SHIFT);
832 rctl |= IXGB_RCTL_SECRC;
834 if (adapter->rx_buffer_len <= IXGB_RXBUFFER_2048)
835 rctl |= IXGB_RCTL_BSIZE_2048;
836 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_4096)
837 rctl |= IXGB_RCTL_BSIZE_4096;
838 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_8192)
839 rctl |= IXGB_RCTL_BSIZE_8192;
840 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_16384)
841 rctl |= IXGB_RCTL_BSIZE_16384;
843 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
847 * ixgb_configure_rx - Configure 82597 Receive Unit after Reset.
848 * @adapter: board private structure
850 * Configure the Rx unit of the MAC after a reset.
854 ixgb_configure_rx(struct ixgb_adapter *adapter)
856 u64 rdba = adapter->rx_ring.dma;
857 u32 rdlen = adapter->rx_ring.count * sizeof(struct ixgb_rx_desc);
858 struct ixgb_hw *hw = &adapter->hw;
862 /* make sure receives are disabled while setting up the descriptors */
864 rctl = IXGB_READ_REG(hw, RCTL);
865 IXGB_WRITE_REG(hw, RCTL, rctl & ~IXGB_RCTL_RXEN);
867 /* set the Receive Delay Timer Register */
869 IXGB_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
871 /* Setup the Base and Length of the Rx Descriptor Ring */
873 IXGB_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
874 IXGB_WRITE_REG(hw, RDBAH, (rdba >> 32));
876 IXGB_WRITE_REG(hw, RDLEN, rdlen);
878 /* Setup the HW Rx Head and Tail Descriptor Pointers */
879 IXGB_WRITE_REG(hw, RDH, 0);
880 IXGB_WRITE_REG(hw, RDT, 0);
882 /* due to the hardware errata with RXDCTL, we are unable to use any of
883 * the performance enhancing features of it without causing other
884 * subtle bugs, some of the bugs could include receive length
885 * corruption at high data rates (WTHRESH > 0) and/or receive
886 * descriptor ring irregularites (particularly in hardware cache) */
887 IXGB_WRITE_REG(hw, RXDCTL, 0);
889 /* Enable Receive Checksum Offload for TCP and UDP */
890 if (adapter->rx_csum) {
891 rxcsum = IXGB_READ_REG(hw, RXCSUM);
892 rxcsum |= IXGB_RXCSUM_TUOFL;
893 IXGB_WRITE_REG(hw, RXCSUM, rxcsum);
896 /* Enable Receives */
898 IXGB_WRITE_REG(hw, RCTL, rctl);
902 * ixgb_free_tx_resources - Free Tx Resources
903 * @adapter: board private structure
905 * Free all transmit software resources
909 ixgb_free_tx_resources(struct ixgb_adapter *adapter)
911 struct pci_dev *pdev = adapter->pdev;
913 ixgb_clean_tx_ring(adapter);
915 vfree(adapter->tx_ring.buffer_info);
916 adapter->tx_ring.buffer_info = NULL;
918 dma_free_coherent(&pdev->dev, adapter->tx_ring.size,
919 adapter->tx_ring.desc, adapter->tx_ring.dma);
921 adapter->tx_ring.desc = NULL;
925 ixgb_unmap_and_free_tx_resource(struct ixgb_adapter *adapter,
926 struct ixgb_buffer *buffer_info)
928 if (buffer_info->dma) {
929 if (buffer_info->mapped_as_page)
930 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
931 buffer_info->length, DMA_TO_DEVICE);
933 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
934 buffer_info->length, DMA_TO_DEVICE);
935 buffer_info->dma = 0;
938 if (buffer_info->skb) {
939 dev_kfree_skb_any(buffer_info->skb);
940 buffer_info->skb = NULL;
942 buffer_info->time_stamp = 0;
943 /* these fields must always be initialized in tx
944 * buffer_info->length = 0;
945 * buffer_info->next_to_watch = 0; */
949 * ixgb_clean_tx_ring - Free Tx Buffers
950 * @adapter: board private structure
954 ixgb_clean_tx_ring(struct ixgb_adapter *adapter)
956 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
957 struct ixgb_buffer *buffer_info;
961 /* Free all the Tx ring sk_buffs */
963 for (i = 0; i < tx_ring->count; i++) {
964 buffer_info = &tx_ring->buffer_info[i];
965 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
968 size = sizeof(struct ixgb_buffer) * tx_ring->count;
969 memset(tx_ring->buffer_info, 0, size);
971 /* Zero out the descriptor ring */
973 memset(tx_ring->desc, 0, tx_ring->size);
975 tx_ring->next_to_use = 0;
976 tx_ring->next_to_clean = 0;
978 IXGB_WRITE_REG(&adapter->hw, TDH, 0);
979 IXGB_WRITE_REG(&adapter->hw, TDT, 0);
983 * ixgb_free_rx_resources - Free Rx Resources
984 * @adapter: board private structure
986 * Free all receive software resources
990 ixgb_free_rx_resources(struct ixgb_adapter *adapter)
992 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
993 struct pci_dev *pdev = adapter->pdev;
995 ixgb_clean_rx_ring(adapter);
997 vfree(rx_ring->buffer_info);
998 rx_ring->buffer_info = NULL;
1000 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
1003 rx_ring->desc = NULL;
1007 * ixgb_clean_rx_ring - Free Rx Buffers
1008 * @adapter: board private structure
1012 ixgb_clean_rx_ring(struct ixgb_adapter *adapter)
1014 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
1015 struct ixgb_buffer *buffer_info;
1016 struct pci_dev *pdev = adapter->pdev;
1020 /* Free all the Rx ring sk_buffs */
1022 for (i = 0; i < rx_ring->count; i++) {
1023 buffer_info = &rx_ring->buffer_info[i];
1024 if (buffer_info->dma) {
1025 dma_unmap_single(&pdev->dev,
1027 buffer_info->length,
1029 buffer_info->dma = 0;
1030 buffer_info->length = 0;
1033 if (buffer_info->skb) {
1034 dev_kfree_skb(buffer_info->skb);
1035 buffer_info->skb = NULL;
1039 size = sizeof(struct ixgb_buffer) * rx_ring->count;
1040 memset(rx_ring->buffer_info, 0, size);
1042 /* Zero out the descriptor ring */
1044 memset(rx_ring->desc, 0, rx_ring->size);
1046 rx_ring->next_to_clean = 0;
1047 rx_ring->next_to_use = 0;
1049 IXGB_WRITE_REG(&adapter->hw, RDH, 0);
1050 IXGB_WRITE_REG(&adapter->hw, RDT, 0);
1054 * ixgb_set_mac - Change the Ethernet Address of the NIC
1055 * @netdev: network interface device structure
1056 * @p: pointer to an address structure
1058 * Returns 0 on success, negative on failure
1062 ixgb_set_mac(struct net_device *netdev, void *p)
1064 struct ixgb_adapter *adapter = netdev_priv(netdev);
1065 struct sockaddr *addr = p;
1067 if (!is_valid_ether_addr(addr->sa_data))
1068 return -EADDRNOTAVAIL;
1070 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1072 ixgb_rar_set(&adapter->hw, addr->sa_data, 0);
1078 * ixgb_set_multi - Multicast and Promiscuous mode set
1079 * @netdev: network interface device structure
1081 * The set_multi entry point is called whenever the multicast address
1082 * list or the network interface flags are updated. This routine is
1083 * responsible for configuring the hardware for proper multicast,
1084 * promiscuous mode, and all-multi behavior.
1088 ixgb_set_multi(struct net_device *netdev)
1090 struct ixgb_adapter *adapter = netdev_priv(netdev);
1091 struct ixgb_hw *hw = &adapter->hw;
1092 struct netdev_hw_addr *ha;
1095 /* Check for Promiscuous and All Multicast modes */
1097 rctl = IXGB_READ_REG(hw, RCTL);
1099 if (netdev->flags & IFF_PROMISC) {
1100 rctl |= (IXGB_RCTL_UPE | IXGB_RCTL_MPE);
1101 /* disable VLAN filtering */
1102 rctl &= ~IXGB_RCTL_CFIEN;
1103 rctl &= ~IXGB_RCTL_VFE;
1105 if (netdev->flags & IFF_ALLMULTI) {
1106 rctl |= IXGB_RCTL_MPE;
1107 rctl &= ~IXGB_RCTL_UPE;
1109 rctl &= ~(IXGB_RCTL_UPE | IXGB_RCTL_MPE);
1111 /* enable VLAN filtering */
1112 rctl |= IXGB_RCTL_VFE;
1113 rctl &= ~IXGB_RCTL_CFIEN;
1116 if (netdev_mc_count(netdev) > IXGB_MAX_NUM_MULTICAST_ADDRESSES) {
1117 rctl |= IXGB_RCTL_MPE;
1118 IXGB_WRITE_REG(hw, RCTL, rctl);
1120 u8 *mta = kmalloc(IXGB_MAX_NUM_MULTICAST_ADDRESSES *
1121 ETH_ALEN, GFP_ATOMIC);
1126 IXGB_WRITE_REG(hw, RCTL, rctl);
1129 netdev_for_each_mc_addr(ha, netdev) {
1130 memcpy(addr, ha->addr, ETH_ALEN);
1134 ixgb_mc_addr_list_update(hw, mta, netdev_mc_count(netdev), 0);
1139 if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX)
1140 ixgb_vlan_strip_enable(adapter);
1142 ixgb_vlan_strip_disable(adapter);
1147 * ixgb_watchdog - Timer Call-back
1148 * @data: pointer to netdev cast into an unsigned long
1152 ixgb_watchdog(unsigned long data)
1154 struct ixgb_adapter *adapter = (struct ixgb_adapter *)data;
1155 struct net_device *netdev = adapter->netdev;
1156 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
1158 ixgb_check_for_link(&adapter->hw);
1160 if (ixgb_check_for_bad_link(&adapter->hw)) {
1161 /* force the reset path */
1162 netif_stop_queue(netdev);
1165 if (adapter->hw.link_up) {
1166 if (!netif_carrier_ok(netdev)) {
1168 "NIC Link is Up 10 Gbps Full Duplex, Flow Control: %s\n",
1169 (adapter->hw.fc.type == ixgb_fc_full) ?
1171 (adapter->hw.fc.type == ixgb_fc_rx_pause) ?
1173 (adapter->hw.fc.type == ixgb_fc_tx_pause) ?
1175 adapter->link_speed = 10000;
1176 adapter->link_duplex = FULL_DUPLEX;
1177 netif_carrier_on(netdev);
1180 if (netif_carrier_ok(netdev)) {
1181 adapter->link_speed = 0;
1182 adapter->link_duplex = 0;
1183 netdev_info(netdev, "NIC Link is Down\n");
1184 netif_carrier_off(netdev);
1188 ixgb_update_stats(adapter);
1190 if (!netif_carrier_ok(netdev)) {
1191 if (IXGB_DESC_UNUSED(txdr) + 1 < txdr->count) {
1192 /* We've lost link, so the controller stops DMA,
1193 * but we've got queued Tx work that's never going
1194 * to get done, so reset controller to flush Tx.
1195 * (Do the reset outside of interrupt context). */
1196 schedule_work(&adapter->tx_timeout_task);
1197 /* return immediately since reset is imminent */
1202 /* Force detection of hung controller every watchdog period */
1203 adapter->detect_tx_hung = true;
1205 /* generate an interrupt to force clean up of any stragglers */
1206 IXGB_WRITE_REG(&adapter->hw, ICS, IXGB_INT_TXDW);
1208 /* Reset the timer */
1209 mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
1212 #define IXGB_TX_FLAGS_CSUM 0x00000001
1213 #define IXGB_TX_FLAGS_VLAN 0x00000002
1214 #define IXGB_TX_FLAGS_TSO 0x00000004
1217 ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb)
1219 struct ixgb_context_desc *context_desc;
1221 u8 ipcss, ipcso, tucss, tucso, hdr_len;
1222 u16 ipcse, tucse, mss;
1225 if (likely(skb_is_gso(skb))) {
1226 struct ixgb_buffer *buffer_info;
1229 if (skb_header_cloned(skb)) {
1230 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1235 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1236 mss = skb_shinfo(skb)->gso_size;
1240 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1243 ipcss = skb_network_offset(skb);
1244 ipcso = (void *)&(iph->check) - (void *)skb->data;
1245 ipcse = skb_transport_offset(skb) - 1;
1246 tucss = skb_transport_offset(skb);
1247 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
1250 i = adapter->tx_ring.next_to_use;
1251 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
1252 buffer_info = &adapter->tx_ring.buffer_info[i];
1253 WARN_ON(buffer_info->dma != 0);
1255 context_desc->ipcss = ipcss;
1256 context_desc->ipcso = ipcso;
1257 context_desc->ipcse = cpu_to_le16(ipcse);
1258 context_desc->tucss = tucss;
1259 context_desc->tucso = tucso;
1260 context_desc->tucse = cpu_to_le16(tucse);
1261 context_desc->mss = cpu_to_le16(mss);
1262 context_desc->hdr_len = hdr_len;
1263 context_desc->status = 0;
1264 context_desc->cmd_type_len = cpu_to_le32(
1265 IXGB_CONTEXT_DESC_TYPE
1266 | IXGB_CONTEXT_DESC_CMD_TSE
1267 | IXGB_CONTEXT_DESC_CMD_IP
1268 | IXGB_CONTEXT_DESC_CMD_TCP
1269 | IXGB_CONTEXT_DESC_CMD_IDE
1270 | (skb->len - (hdr_len)));
1273 if (++i == adapter->tx_ring.count) i = 0;
1274 adapter->tx_ring.next_to_use = i;
1283 ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb)
1285 struct ixgb_context_desc *context_desc;
1289 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1290 struct ixgb_buffer *buffer_info;
1291 css = skb_checksum_start_offset(skb);
1292 cso = css + skb->csum_offset;
1294 i = adapter->tx_ring.next_to_use;
1295 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
1296 buffer_info = &adapter->tx_ring.buffer_info[i];
1297 WARN_ON(buffer_info->dma != 0);
1299 context_desc->tucss = css;
1300 context_desc->tucso = cso;
1301 context_desc->tucse = 0;
1302 /* zero out any previously existing data in one instruction */
1303 *(u32 *)&(context_desc->ipcss) = 0;
1304 context_desc->status = 0;
1305 context_desc->hdr_len = 0;
1306 context_desc->mss = 0;
1307 context_desc->cmd_type_len =
1308 cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
1309 | IXGB_TX_DESC_CMD_IDE);
1311 if (++i == adapter->tx_ring.count) i = 0;
1312 adapter->tx_ring.next_to_use = i;
1320 #define IXGB_MAX_TXD_PWR 14
1321 #define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR)
1324 ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
1327 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1328 struct pci_dev *pdev = adapter->pdev;
1329 struct ixgb_buffer *buffer_info;
1330 int len = skb_headlen(skb);
1331 unsigned int offset = 0, size, count = 0, i;
1332 unsigned int mss = skb_shinfo(skb)->gso_size;
1333 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
1336 i = tx_ring->next_to_use;
1339 buffer_info = &tx_ring->buffer_info[i];
1340 size = min(len, IXGB_MAX_DATA_PER_TXD);
1341 /* Workaround for premature desc write-backs
1342 * in TSO mode. Append 4-byte sentinel desc */
1343 if (unlikely(mss && !nr_frags && size == len && size > 8))
1346 buffer_info->length = size;
1347 WARN_ON(buffer_info->dma != 0);
1348 buffer_info->time_stamp = jiffies;
1349 buffer_info->mapped_as_page = false;
1350 buffer_info->dma = dma_map_single(&pdev->dev,
1352 size, DMA_TO_DEVICE);
1353 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
1355 buffer_info->next_to_watch = 0;
1362 if (i == tx_ring->count)
1367 for (f = 0; f < nr_frags; f++) {
1368 const struct skb_frag_struct *frag;
1370 frag = &skb_shinfo(skb)->frags[f];
1371 len = skb_frag_size(frag);
1376 if (i == tx_ring->count)
1379 buffer_info = &tx_ring->buffer_info[i];
1380 size = min(len, IXGB_MAX_DATA_PER_TXD);
1382 /* Workaround for premature desc write-backs
1383 * in TSO mode. Append 4-byte sentinel desc */
1384 if (unlikely(mss && (f == (nr_frags - 1))
1385 && size == len && size > 8))
1388 buffer_info->length = size;
1389 buffer_info->time_stamp = jiffies;
1390 buffer_info->mapped_as_page = true;
1392 skb_frag_dma_map(&pdev->dev, frag, offset, size,
1394 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
1396 buffer_info->next_to_watch = 0;
1403 tx_ring->buffer_info[i].skb = skb;
1404 tx_ring->buffer_info[first].next_to_watch = i;
1409 dev_err(&pdev->dev, "TX DMA map failed\n");
1410 buffer_info->dma = 0;
1416 i += tx_ring->count;
1418 buffer_info = &tx_ring->buffer_info[i];
1419 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
1426 ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,int tx_flags)
1428 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1429 struct ixgb_tx_desc *tx_desc = NULL;
1430 struct ixgb_buffer *buffer_info;
1431 u32 cmd_type_len = adapter->tx_cmd_type;
1436 if (tx_flags & IXGB_TX_FLAGS_TSO) {
1437 cmd_type_len |= IXGB_TX_DESC_CMD_TSE;
1438 popts |= (IXGB_TX_DESC_POPTS_IXSM | IXGB_TX_DESC_POPTS_TXSM);
1441 if (tx_flags & IXGB_TX_FLAGS_CSUM)
1442 popts |= IXGB_TX_DESC_POPTS_TXSM;
1444 if (tx_flags & IXGB_TX_FLAGS_VLAN)
1445 cmd_type_len |= IXGB_TX_DESC_CMD_VLE;
1447 i = tx_ring->next_to_use;
1450 buffer_info = &tx_ring->buffer_info[i];
1451 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1452 tx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
1453 tx_desc->cmd_type_len =
1454 cpu_to_le32(cmd_type_len | buffer_info->length);
1455 tx_desc->status = status;
1456 tx_desc->popts = popts;
1457 tx_desc->vlan = cpu_to_le16(vlan_id);
1459 if (++i == tx_ring->count) i = 0;
1462 tx_desc->cmd_type_len |=
1463 cpu_to_le32(IXGB_TX_DESC_CMD_EOP | IXGB_TX_DESC_CMD_RS);
1465 /* Force memory writes to complete before letting h/w
1466 * know there are new descriptors to fetch. (Only
1467 * applicable for weak-ordered memory model archs,
1468 * such as IA-64). */
1471 tx_ring->next_to_use = i;
1472 IXGB_WRITE_REG(&adapter->hw, TDT, i);
1475 static int __ixgb_maybe_stop_tx(struct net_device *netdev, int size)
1477 struct ixgb_adapter *adapter = netdev_priv(netdev);
1478 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1480 netif_stop_queue(netdev);
1481 /* Herbert's original patch had:
1482 * smp_mb__after_netif_stop_queue();
1483 * but since that doesn't exist yet, just open code it. */
1486 /* We need to check again in a case another CPU has just
1487 * made room available. */
1488 if (likely(IXGB_DESC_UNUSED(tx_ring) < size))
1492 netif_start_queue(netdev);
1493 ++adapter->restart_queue;
1497 static int ixgb_maybe_stop_tx(struct net_device *netdev,
1498 struct ixgb_desc_ring *tx_ring, int size)
1500 if (likely(IXGB_DESC_UNUSED(tx_ring) >= size))
1502 return __ixgb_maybe_stop_tx(netdev, size);
1506 /* Tx Descriptors needed, worst case */
1507 #define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
1508 (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
1509 #define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) /* skb->date */ + \
1510 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 /* for context */ \
1511 + 1 /* one more needed for sentinel TSO workaround */
1514 ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1516 struct ixgb_adapter *adapter = netdev_priv(netdev);
1518 unsigned int tx_flags = 0;
1523 if (test_bit(__IXGB_DOWN, &adapter->flags)) {
1525 return NETDEV_TX_OK;
1528 if (skb->len <= 0) {
1530 return NETDEV_TX_OK;
1533 if (unlikely(ixgb_maybe_stop_tx(netdev, &adapter->tx_ring,
1535 return NETDEV_TX_BUSY;
1537 if (vlan_tx_tag_present(skb)) {
1538 tx_flags |= IXGB_TX_FLAGS_VLAN;
1539 vlan_id = vlan_tx_tag_get(skb);
1542 first = adapter->tx_ring.next_to_use;
1544 tso = ixgb_tso(adapter, skb);
1547 return NETDEV_TX_OK;
1551 tx_flags |= IXGB_TX_FLAGS_TSO;
1552 else if (ixgb_tx_csum(adapter, skb))
1553 tx_flags |= IXGB_TX_FLAGS_CSUM;
1555 count = ixgb_tx_map(adapter, skb, first);
1558 ixgb_tx_queue(adapter, count, vlan_id, tx_flags);
1559 /* Make sure there is space in the ring for the next send. */
1560 ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, DESC_NEEDED);
1563 dev_kfree_skb_any(skb);
1564 adapter->tx_ring.buffer_info[first].time_stamp = 0;
1565 adapter->tx_ring.next_to_use = first;
1568 return NETDEV_TX_OK;
1572 * ixgb_tx_timeout - Respond to a Tx Hang
1573 * @netdev: network interface device structure
1577 ixgb_tx_timeout(struct net_device *netdev)
1579 struct ixgb_adapter *adapter = netdev_priv(netdev);
1581 /* Do the reset outside of interrupt context */
1582 schedule_work(&adapter->tx_timeout_task);
1586 ixgb_tx_timeout_task(struct work_struct *work)
1588 struct ixgb_adapter *adapter =
1589 container_of(work, struct ixgb_adapter, tx_timeout_task);
1591 adapter->tx_timeout_count++;
1592 ixgb_down(adapter, true);
1597 * ixgb_get_stats - Get System Network Statistics
1598 * @netdev: network interface device structure
1600 * Returns the address of the device statistics structure.
1601 * The statistics are actually updated from the timer callback.
1604 static struct net_device_stats *
1605 ixgb_get_stats(struct net_device *netdev)
1607 return &netdev->stats;
1611 * ixgb_change_mtu - Change the Maximum Transfer Unit
1612 * @netdev: network interface device structure
1613 * @new_mtu: new value for maximum frame size
1615 * Returns 0 on success, negative on failure
1619 ixgb_change_mtu(struct net_device *netdev, int new_mtu)
1621 struct ixgb_adapter *adapter = netdev_priv(netdev);
1622 int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1623 int old_max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1625 /* MTU < 68 is an error for IPv4 traffic, just don't allow it */
1626 if ((new_mtu < 68) ||
1627 (max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) {
1628 netif_err(adapter, probe, adapter->netdev,
1629 "Invalid MTU setting %d\n", new_mtu);
1633 if (old_max_frame == max_frame)
1636 if (netif_running(netdev))
1637 ixgb_down(adapter, true);
1639 adapter->rx_buffer_len = max_frame + 8; /* + 8 for errata */
1641 netdev->mtu = new_mtu;
1643 if (netif_running(netdev))
1650 * ixgb_update_stats - Update the board statistics counters.
1651 * @adapter: board private structure
1655 ixgb_update_stats(struct ixgb_adapter *adapter)
1657 struct net_device *netdev = adapter->netdev;
1658 struct pci_dev *pdev = adapter->pdev;
1660 /* Prevent stats update while adapter is being reset */
1661 if (pci_channel_offline(pdev))
1664 if ((netdev->flags & IFF_PROMISC) || (netdev->flags & IFF_ALLMULTI) ||
1665 (netdev_mc_count(netdev) > IXGB_MAX_NUM_MULTICAST_ADDRESSES)) {
1666 u64 multi = IXGB_READ_REG(&adapter->hw, MPRCL);
1667 u32 bcast_l = IXGB_READ_REG(&adapter->hw, BPRCL);
1668 u32 bcast_h = IXGB_READ_REG(&adapter->hw, BPRCH);
1669 u64 bcast = ((u64)bcast_h << 32) | bcast_l;
1671 multi |= ((u64)IXGB_READ_REG(&adapter->hw, MPRCH) << 32);
1672 /* fix up multicast stats by removing broadcasts */
1676 adapter->stats.mprcl += (multi & 0xFFFFFFFF);
1677 adapter->stats.mprch += (multi >> 32);
1678 adapter->stats.bprcl += bcast_l;
1679 adapter->stats.bprch += bcast_h;
1681 adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL);
1682 adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH);
1683 adapter->stats.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL);
1684 adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH);
1686 adapter->stats.tprl += IXGB_READ_REG(&adapter->hw, TPRL);
1687 adapter->stats.tprh += IXGB_READ_REG(&adapter->hw, TPRH);
1688 adapter->stats.gprcl += IXGB_READ_REG(&adapter->hw, GPRCL);
1689 adapter->stats.gprch += IXGB_READ_REG(&adapter->hw, GPRCH);
1690 adapter->stats.uprcl += IXGB_READ_REG(&adapter->hw, UPRCL);
1691 adapter->stats.uprch += IXGB_READ_REG(&adapter->hw, UPRCH);
1692 adapter->stats.vprcl += IXGB_READ_REG(&adapter->hw, VPRCL);
1693 adapter->stats.vprch += IXGB_READ_REG(&adapter->hw, VPRCH);
1694 adapter->stats.jprcl += IXGB_READ_REG(&adapter->hw, JPRCL);
1695 adapter->stats.jprch += IXGB_READ_REG(&adapter->hw, JPRCH);
1696 adapter->stats.gorcl += IXGB_READ_REG(&adapter->hw, GORCL);
1697 adapter->stats.gorch += IXGB_READ_REG(&adapter->hw, GORCH);
1698 adapter->stats.torl += IXGB_READ_REG(&adapter->hw, TORL);
1699 adapter->stats.torh += IXGB_READ_REG(&adapter->hw, TORH);
1700 adapter->stats.rnbc += IXGB_READ_REG(&adapter->hw, RNBC);
1701 adapter->stats.ruc += IXGB_READ_REG(&adapter->hw, RUC);
1702 adapter->stats.roc += IXGB_READ_REG(&adapter->hw, ROC);
1703 adapter->stats.rlec += IXGB_READ_REG(&adapter->hw, RLEC);
1704 adapter->stats.crcerrs += IXGB_READ_REG(&adapter->hw, CRCERRS);
1705 adapter->stats.icbc += IXGB_READ_REG(&adapter->hw, ICBC);
1706 adapter->stats.ecbc += IXGB_READ_REG(&adapter->hw, ECBC);
1707 adapter->stats.mpc += IXGB_READ_REG(&adapter->hw, MPC);
1708 adapter->stats.tptl += IXGB_READ_REG(&adapter->hw, TPTL);
1709 adapter->stats.tpth += IXGB_READ_REG(&adapter->hw, TPTH);
1710 adapter->stats.gptcl += IXGB_READ_REG(&adapter->hw, GPTCL);
1711 adapter->stats.gptch += IXGB_READ_REG(&adapter->hw, GPTCH);
1712 adapter->stats.bptcl += IXGB_READ_REG(&adapter->hw, BPTCL);
1713 adapter->stats.bptch += IXGB_READ_REG(&adapter->hw, BPTCH);
1714 adapter->stats.mptcl += IXGB_READ_REG(&adapter->hw, MPTCL);
1715 adapter->stats.mptch += IXGB_READ_REG(&adapter->hw, MPTCH);
1716 adapter->stats.uptcl += IXGB_READ_REG(&adapter->hw, UPTCL);
1717 adapter->stats.uptch += IXGB_READ_REG(&adapter->hw, UPTCH);
1718 adapter->stats.vptcl += IXGB_READ_REG(&adapter->hw, VPTCL);
1719 adapter->stats.vptch += IXGB_READ_REG(&adapter->hw, VPTCH);
1720 adapter->stats.jptcl += IXGB_READ_REG(&adapter->hw, JPTCL);
1721 adapter->stats.jptch += IXGB_READ_REG(&adapter->hw, JPTCH);
1722 adapter->stats.gotcl += IXGB_READ_REG(&adapter->hw, GOTCL);
1723 adapter->stats.gotch += IXGB_READ_REG(&adapter->hw, GOTCH);
1724 adapter->stats.totl += IXGB_READ_REG(&adapter->hw, TOTL);
1725 adapter->stats.toth += IXGB_READ_REG(&adapter->hw, TOTH);
1726 adapter->stats.dc += IXGB_READ_REG(&adapter->hw, DC);
1727 adapter->stats.plt64c += IXGB_READ_REG(&adapter->hw, PLT64C);
1728 adapter->stats.tsctc += IXGB_READ_REG(&adapter->hw, TSCTC);
1729 adapter->stats.tsctfc += IXGB_READ_REG(&adapter->hw, TSCTFC);
1730 adapter->stats.ibic += IXGB_READ_REG(&adapter->hw, IBIC);
1731 adapter->stats.rfc += IXGB_READ_REG(&adapter->hw, RFC);
1732 adapter->stats.lfc += IXGB_READ_REG(&adapter->hw, LFC);
1733 adapter->stats.pfrc += IXGB_READ_REG(&adapter->hw, PFRC);
1734 adapter->stats.pftc += IXGB_READ_REG(&adapter->hw, PFTC);
1735 adapter->stats.mcfrc += IXGB_READ_REG(&adapter->hw, MCFRC);
1736 adapter->stats.mcftc += IXGB_READ_REG(&adapter->hw, MCFTC);
1737 adapter->stats.xonrxc += IXGB_READ_REG(&adapter->hw, XONRXC);
1738 adapter->stats.xontxc += IXGB_READ_REG(&adapter->hw, XONTXC);
1739 adapter->stats.xoffrxc += IXGB_READ_REG(&adapter->hw, XOFFRXC);
1740 adapter->stats.xofftxc += IXGB_READ_REG(&adapter->hw, XOFFTXC);
1741 adapter->stats.rjc += IXGB_READ_REG(&adapter->hw, RJC);
1743 /* Fill out the OS statistics structure */
1745 netdev->stats.rx_packets = adapter->stats.gprcl;
1746 netdev->stats.tx_packets = adapter->stats.gptcl;
1747 netdev->stats.rx_bytes = adapter->stats.gorcl;
1748 netdev->stats.tx_bytes = adapter->stats.gotcl;
1749 netdev->stats.multicast = adapter->stats.mprcl;
1750 netdev->stats.collisions = 0;
1752 /* ignore RLEC as it reports errors for padded (<64bytes) frames
1753 * with a length in the type/len field */
1754 netdev->stats.rx_errors =
1755 /* adapter->stats.rnbc + */ adapter->stats.crcerrs +
1756 adapter->stats.ruc +
1757 adapter->stats.roc /*+ adapter->stats.rlec */ +
1758 adapter->stats.icbc +
1759 adapter->stats.ecbc + adapter->stats.mpc;
1762 * netdev->stats.rx_length_errors = adapter->stats.rlec;
1765 netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
1766 netdev->stats.rx_fifo_errors = adapter->stats.mpc;
1767 netdev->stats.rx_missed_errors = adapter->stats.mpc;
1768 netdev->stats.rx_over_errors = adapter->stats.mpc;
1770 netdev->stats.tx_errors = 0;
1771 netdev->stats.rx_frame_errors = 0;
1772 netdev->stats.tx_aborted_errors = 0;
1773 netdev->stats.tx_carrier_errors = 0;
1774 netdev->stats.tx_fifo_errors = 0;
1775 netdev->stats.tx_heartbeat_errors = 0;
1776 netdev->stats.tx_window_errors = 0;
1779 #define IXGB_MAX_INTR 10
1781 * ixgb_intr - Interrupt Handler
1782 * @irq: interrupt number
1783 * @data: pointer to a network interface device structure
1787 ixgb_intr(int irq, void *data)
1789 struct net_device *netdev = data;
1790 struct ixgb_adapter *adapter = netdev_priv(netdev);
1791 struct ixgb_hw *hw = &adapter->hw;
1792 u32 icr = IXGB_READ_REG(hw, ICR);
1795 return IRQ_NONE; /* Not our interrupt */
1797 if (unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC)))
1798 if (!test_bit(__IXGB_DOWN, &adapter->flags))
1799 mod_timer(&adapter->watchdog_timer, jiffies);
1801 if (napi_schedule_prep(&adapter->napi)) {
1803 /* Disable interrupts and register for poll. The flush
1804 of the posted write is intentionally left out.
1807 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
1808 __napi_schedule(&adapter->napi);
1814 * ixgb_clean - NAPI Rx polling callback
1815 * @adapter: board private structure
1819 ixgb_clean(struct napi_struct *napi, int budget)
1821 struct ixgb_adapter *adapter = container_of(napi, struct ixgb_adapter, napi);
1824 ixgb_clean_tx_irq(adapter);
1825 ixgb_clean_rx_irq(adapter, &work_done, budget);
1827 /* If budget not fully consumed, exit the polling mode */
1828 if (work_done < budget) {
1829 napi_complete(napi);
1830 if (!test_bit(__IXGB_DOWN, &adapter->flags))
1831 ixgb_irq_enable(adapter);
1838 * ixgb_clean_tx_irq - Reclaim resources after transmit completes
1839 * @adapter: board private structure
1843 ixgb_clean_tx_irq(struct ixgb_adapter *adapter)
1845 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1846 struct net_device *netdev = adapter->netdev;
1847 struct ixgb_tx_desc *tx_desc, *eop_desc;
1848 struct ixgb_buffer *buffer_info;
1849 unsigned int i, eop;
1850 bool cleaned = false;
1852 i = tx_ring->next_to_clean;
1853 eop = tx_ring->buffer_info[i].next_to_watch;
1854 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1856 while (eop_desc->status & IXGB_TX_DESC_STATUS_DD) {
1858 rmb(); /* read buffer_info after eop_desc */
1859 for (cleaned = false; !cleaned; ) {
1860 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1861 buffer_info = &tx_ring->buffer_info[i];
1863 if (tx_desc->popts &
1864 (IXGB_TX_DESC_POPTS_TXSM |
1865 IXGB_TX_DESC_POPTS_IXSM))
1866 adapter->hw_csum_tx_good++;
1868 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
1870 *(u32 *)&(tx_desc->status) = 0;
1872 cleaned = (i == eop);
1873 if (++i == tx_ring->count) i = 0;
1876 eop = tx_ring->buffer_info[i].next_to_watch;
1877 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1880 tx_ring->next_to_clean = i;
1882 if (unlikely(cleaned && netif_carrier_ok(netdev) &&
1883 IXGB_DESC_UNUSED(tx_ring) >= DESC_NEEDED)) {
1884 /* Make sure that anybody stopping the queue after this
1885 * sees the new next_to_clean. */
1888 if (netif_queue_stopped(netdev) &&
1889 !(test_bit(__IXGB_DOWN, &adapter->flags))) {
1890 netif_wake_queue(netdev);
1891 ++adapter->restart_queue;
1895 if (adapter->detect_tx_hung) {
1896 /* detect a transmit hang in hardware, this serializes the
1897 * check with the clearing of time_stamp and movement of i */
1898 adapter->detect_tx_hung = false;
1899 if (tx_ring->buffer_info[eop].time_stamp &&
1900 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + HZ)
1901 && !(IXGB_READ_REG(&adapter->hw, STATUS) &
1902 IXGB_STATUS_TXOFF)) {
1903 /* detected Tx unit hang */
1904 netif_err(adapter, drv, adapter->netdev,
1905 "Detected Tx Unit Hang\n"
1908 " next_to_use <%x>\n"
1909 " next_to_clean <%x>\n"
1910 "buffer_info[next_to_clean]\n"
1911 " time_stamp <%lx>\n"
1912 " next_to_watch <%x>\n"
1914 " next_to_watch.status <%x>\n",
1915 IXGB_READ_REG(&adapter->hw, TDH),
1916 IXGB_READ_REG(&adapter->hw, TDT),
1917 tx_ring->next_to_use,
1918 tx_ring->next_to_clean,
1919 tx_ring->buffer_info[eop].time_stamp,
1923 netif_stop_queue(netdev);
1931 * ixgb_rx_checksum - Receive Checksum Offload for 82597.
1932 * @adapter: board private structure
1933 * @rx_desc: receive descriptor
1934 * @sk_buff: socket buffer with received data
1938 ixgb_rx_checksum(struct ixgb_adapter *adapter,
1939 struct ixgb_rx_desc *rx_desc,
1940 struct sk_buff *skb)
1942 /* Ignore Checksum bit is set OR
1943 * TCP Checksum has not been calculated
1945 if ((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) ||
1946 (!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) {
1947 skb_checksum_none_assert(skb);
1951 /* At this point we know the hardware did the TCP checksum */
1952 /* now look at the TCP checksum error bit */
1953 if (rx_desc->errors & IXGB_RX_DESC_ERRORS_TCPE) {
1954 /* let the stack verify checksum errors */
1955 skb_checksum_none_assert(skb);
1956 adapter->hw_csum_rx_error++;
1958 /* TCP checksum is good */
1959 skb->ip_summed = CHECKSUM_UNNECESSARY;
1960 adapter->hw_csum_rx_good++;
1965 * this should improve performance for small packets with large amounts
1966 * of reassembly being done in the stack
1968 static void ixgb_check_copybreak(struct net_device *netdev,
1969 struct ixgb_buffer *buffer_info,
1970 u32 length, struct sk_buff **skb)
1972 struct sk_buff *new_skb;
1974 if (length > copybreak)
1977 new_skb = netdev_alloc_skb_ip_align(netdev, length);
1981 skb_copy_to_linear_data_offset(new_skb, -NET_IP_ALIGN,
1982 (*skb)->data - NET_IP_ALIGN,
1983 length + NET_IP_ALIGN);
1984 /* save the skb in buffer_info as good */
1985 buffer_info->skb = *skb;
1990 * ixgb_clean_rx_irq - Send received data up the network stack,
1991 * @adapter: board private structure
1995 ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do)
1997 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
1998 struct net_device *netdev = adapter->netdev;
1999 struct pci_dev *pdev = adapter->pdev;
2000 struct ixgb_rx_desc *rx_desc, *next_rxd;
2001 struct ixgb_buffer *buffer_info, *next_buffer, *next2_buffer;
2004 int cleaned_count = 0;
2005 bool cleaned = false;
2007 i = rx_ring->next_to_clean;
2008 rx_desc = IXGB_RX_DESC(*rx_ring, i);
2009 buffer_info = &rx_ring->buffer_info[i];
2011 while (rx_desc->status & IXGB_RX_DESC_STATUS_DD) {
2012 struct sk_buff *skb;
2015 if (*work_done >= work_to_do)
2019 rmb(); /* read descriptor and rx_buffer_info after status DD */
2020 status = rx_desc->status;
2021 skb = buffer_info->skb;
2022 buffer_info->skb = NULL;
2024 prefetch(skb->data - NET_IP_ALIGN);
2026 if (++i == rx_ring->count)
2028 next_rxd = IXGB_RX_DESC(*rx_ring, i);
2032 if (j == rx_ring->count)
2034 next2_buffer = &rx_ring->buffer_info[j];
2035 prefetch(next2_buffer);
2037 next_buffer = &rx_ring->buffer_info[i];
2042 dma_unmap_single(&pdev->dev,
2044 buffer_info->length,
2046 buffer_info->dma = 0;
2048 length = le16_to_cpu(rx_desc->length);
2049 rx_desc->length = 0;
2051 if (unlikely(!(status & IXGB_RX_DESC_STATUS_EOP))) {
2053 /* All receives must fit into a single buffer */
2055 pr_debug("Receive packet consumed multiple buffers length<%x>\n",
2058 dev_kfree_skb_irq(skb);
2062 if (unlikely(rx_desc->errors &
2063 (IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE |
2064 IXGB_RX_DESC_ERRORS_P | IXGB_RX_DESC_ERRORS_RXE))) {
2065 dev_kfree_skb_irq(skb);
2069 ixgb_check_copybreak(netdev, buffer_info, length, &skb);
2072 skb_put(skb, length);
2074 /* Receive Checksum Offload */
2075 ixgb_rx_checksum(adapter, rx_desc, skb);
2077 skb->protocol = eth_type_trans(skb, netdev);
2078 if (status & IXGB_RX_DESC_STATUS_VP)
2079 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
2080 le16_to_cpu(rx_desc->special));
2082 netif_receive_skb(skb);
2085 /* clean up descriptor, might be written over by hw */
2086 rx_desc->status = 0;
2088 /* return some buffers to hardware, one at a time is too slow */
2089 if (unlikely(cleaned_count >= IXGB_RX_BUFFER_WRITE)) {
2090 ixgb_alloc_rx_buffers(adapter, cleaned_count);
2094 /* use prefetched values */
2096 buffer_info = next_buffer;
2099 rx_ring->next_to_clean = i;
2101 cleaned_count = IXGB_DESC_UNUSED(rx_ring);
2103 ixgb_alloc_rx_buffers(adapter, cleaned_count);
2109 * ixgb_alloc_rx_buffers - Replace used receive buffers
2110 * @adapter: address of board private structure
2114 ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter, int cleaned_count)
2116 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
2117 struct net_device *netdev = adapter->netdev;
2118 struct pci_dev *pdev = adapter->pdev;
2119 struct ixgb_rx_desc *rx_desc;
2120 struct ixgb_buffer *buffer_info;
2121 struct sk_buff *skb;
2125 i = rx_ring->next_to_use;
2126 buffer_info = &rx_ring->buffer_info[i];
2127 cleancount = IXGB_DESC_UNUSED(rx_ring);
2130 /* leave three descriptors unused */
2131 while (--cleancount > 2 && cleaned_count--) {
2132 /* recycle! its good for you */
2133 skb = buffer_info->skb;
2139 skb = netdev_alloc_skb_ip_align(netdev, adapter->rx_buffer_len);
2140 if (unlikely(!skb)) {
2141 /* Better luck next round */
2142 adapter->alloc_rx_buff_failed++;
2146 buffer_info->skb = skb;
2147 buffer_info->length = adapter->rx_buffer_len;
2149 buffer_info->dma = dma_map_single(&pdev->dev,
2151 adapter->rx_buffer_len,
2153 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
2154 adapter->alloc_rx_buff_failed++;
2158 rx_desc = IXGB_RX_DESC(*rx_ring, i);
2159 rx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
2160 /* guarantee DD bit not set now before h/w gets descriptor
2161 * this is the rest of the workaround for h/w double
2163 rx_desc->status = 0;
2166 if (++i == rx_ring->count)
2168 buffer_info = &rx_ring->buffer_info[i];
2171 if (likely(rx_ring->next_to_use != i)) {
2172 rx_ring->next_to_use = i;
2173 if (unlikely(i-- == 0))
2174 i = (rx_ring->count - 1);
2176 /* Force memory writes to complete before letting h/w
2177 * know there are new descriptors to fetch. (Only
2178 * applicable for weak-ordered memory model archs, such
2181 IXGB_WRITE_REG(&adapter->hw, RDT, i);
2186 ixgb_vlan_strip_enable(struct ixgb_adapter *adapter)
2190 /* enable VLAN tag insert/strip */
2191 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2192 ctrl |= IXGB_CTRL0_VME;
2193 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2197 ixgb_vlan_strip_disable(struct ixgb_adapter *adapter)
2201 /* disable VLAN tag insert/strip */
2202 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2203 ctrl &= ~IXGB_CTRL0_VME;
2204 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2208 ixgb_vlan_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid)
2210 struct ixgb_adapter *adapter = netdev_priv(netdev);
2213 /* add VID to filter table */
2215 index = (vid >> 5) & 0x7F;
2216 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2217 vfta |= (1 << (vid & 0x1F));
2218 ixgb_write_vfta(&adapter->hw, index, vfta);
2219 set_bit(vid, adapter->active_vlans);
2225 ixgb_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid)
2227 struct ixgb_adapter *adapter = netdev_priv(netdev);
2230 /* remove VID from filter table */
2232 index = (vid >> 5) & 0x7F;
2233 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2234 vfta &= ~(1 << (vid & 0x1F));
2235 ixgb_write_vfta(&adapter->hw, index, vfta);
2236 clear_bit(vid, adapter->active_vlans);
2242 ixgb_restore_vlan(struct ixgb_adapter *adapter)
2246 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
2247 ixgb_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid);
2250 #ifdef CONFIG_NET_POLL_CONTROLLER
2252 * Polling 'interrupt' - used by things like netconsole to send skbs
2253 * without having to re-enable interrupts. It's not called while
2254 * the interrupt routine is executing.
2257 static void ixgb_netpoll(struct net_device *dev)
2259 struct ixgb_adapter *adapter = netdev_priv(dev);
2261 disable_irq(adapter->pdev->irq);
2262 ixgb_intr(adapter->pdev->irq, dev);
2263 enable_irq(adapter->pdev->irq);
2268 * ixgb_io_error_detected - called when PCI error is detected
2269 * @pdev: pointer to pci device with error
2270 * @state: pci channel state after error
2272 * This callback is called by the PCI subsystem whenever
2273 * a PCI bus error is detected.
2275 static pci_ers_result_t ixgb_io_error_detected(struct pci_dev *pdev,
2276 enum pci_channel_state state)
2278 struct net_device *netdev = pci_get_drvdata(pdev);
2279 struct ixgb_adapter *adapter = netdev_priv(netdev);
2281 netif_device_detach(netdev);
2283 if (state == pci_channel_io_perm_failure)
2284 return PCI_ERS_RESULT_DISCONNECT;
2286 if (netif_running(netdev))
2287 ixgb_down(adapter, true);
2289 pci_disable_device(pdev);
2291 /* Request a slot reset. */
2292 return PCI_ERS_RESULT_NEED_RESET;
2296 * ixgb_io_slot_reset - called after the pci bus has been reset.
2297 * @pdev pointer to pci device with error
2299 * This callback is called after the PCI bus has been reset.
2300 * Basically, this tries to restart the card from scratch.
2301 * This is a shortened version of the device probe/discovery code,
2302 * it resembles the first-half of the ixgb_probe() routine.
2304 static pci_ers_result_t ixgb_io_slot_reset(struct pci_dev *pdev)
2306 struct net_device *netdev = pci_get_drvdata(pdev);
2307 struct ixgb_adapter *adapter = netdev_priv(netdev);
2309 if (pci_enable_device(pdev)) {
2310 netif_err(adapter, probe, adapter->netdev,
2311 "Cannot re-enable PCI device after reset\n");
2312 return PCI_ERS_RESULT_DISCONNECT;
2315 /* Perform card reset only on one instance of the card */
2316 if (0 != PCI_FUNC (pdev->devfn))
2317 return PCI_ERS_RESULT_RECOVERED;
2319 pci_set_master(pdev);
2321 netif_carrier_off(netdev);
2322 netif_stop_queue(netdev);
2323 ixgb_reset(adapter);
2325 /* Make sure the EEPROM is good */
2326 if (!ixgb_validate_eeprom_checksum(&adapter->hw)) {
2327 netif_err(adapter, probe, adapter->netdev,
2328 "After reset, the EEPROM checksum is not valid\n");
2329 return PCI_ERS_RESULT_DISCONNECT;
2331 ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
2332 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
2334 if (!is_valid_ether_addr(netdev->perm_addr)) {
2335 netif_err(adapter, probe, adapter->netdev,
2336 "After reset, invalid MAC address\n");
2337 return PCI_ERS_RESULT_DISCONNECT;
2340 return PCI_ERS_RESULT_RECOVERED;
2344 * ixgb_io_resume - called when its OK to resume normal operations
2345 * @pdev pointer to pci device with error
2347 * The error recovery driver tells us that its OK to resume
2348 * normal operation. Implementation resembles the second-half
2349 * of the ixgb_probe() routine.
2351 static void ixgb_io_resume(struct pci_dev *pdev)
2353 struct net_device *netdev = pci_get_drvdata(pdev);
2354 struct ixgb_adapter *adapter = netdev_priv(netdev);
2356 pci_set_master(pdev);
2358 if (netif_running(netdev)) {
2359 if (ixgb_up(adapter)) {
2360 pr_err("can't bring device back up after reset\n");
2365 netif_device_attach(netdev);
2366 mod_timer(&adapter->watchdog_timer, jiffies);