| /******************************************************************************* |
| |
| Intel PRO/10GbE Linux driver |
| Copyright(c) 1999 - 2008 Intel Corporation. |
| |
| This program is free software; you can redistribute it and/or modify it |
| under the terms and conditions of the GNU General Public License, |
| version 2, as published by the Free Software Foundation. |
| |
| This program is distributed in the hope it will be useful, but WITHOUT |
| ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| more details. |
| |
| You should have received a copy of the GNU General Public License along with |
| this program; if not, write to the Free Software Foundation, Inc., |
| 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. |
| |
| The full GNU General Public License is included in this distribution in |
| the file called "COPYING". |
| |
| Contact Information: |
| Linux NICS <linux.nics@intel.com> |
| e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> |
| Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
| |
| *******************************************************************************/ |
| |
| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| |
| #include <linux/prefetch.h> |
| #include "ixgb.h" |
| |
| char ixgb_driver_name[] = "ixgb"; |
| static char ixgb_driver_string[] = "Intel(R) PRO/10GbE Network Driver"; |
| |
| #define DRIVERNAPI "-NAPI" |
| #define DRV_VERSION "1.0.135-k2" DRIVERNAPI |
| const char ixgb_driver_version[] = DRV_VERSION; |
| static const char ixgb_copyright[] = "Copyright (c) 1999-2008 Intel Corporation."; |
| |
| #define IXGB_CB_LENGTH 256 |
| static unsigned int copybreak __read_mostly = IXGB_CB_LENGTH; |
| module_param(copybreak, uint, 0644); |
| MODULE_PARM_DESC(copybreak, |
| "Maximum size of packet that is copied to a new buffer on receive"); |
| |
| /* ixgb_pci_tbl - PCI Device ID Table |
| * |
| * Wildcard entries (PCI_ANY_ID) should come last |
| * Last entry must be all 0s |
| * |
| * { Vendor ID, Device ID, SubVendor ID, SubDevice ID, |
| * Class, Class Mask, private data (not used) } |
| */ |
| static DEFINE_PCI_DEVICE_TABLE(ixgb_pci_tbl) = { |
| {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX, |
| PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, |
| {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_CX4, |
| PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, |
| {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_SR, |
| PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, |
| {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_LR, |
| PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, |
| |
| /* required last entry */ |
| {0,} |
| }; |
| |
| MODULE_DEVICE_TABLE(pci, ixgb_pci_tbl); |
| |
| /* Local Function Prototypes */ |
| static int ixgb_init_module(void); |
| static void ixgb_exit_module(void); |
| static int ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent); |
| static void __devexit ixgb_remove(struct pci_dev *pdev); |
| static int ixgb_sw_init(struct ixgb_adapter *adapter); |
| static int ixgb_open(struct net_device *netdev); |
| static int ixgb_close(struct net_device *netdev); |
| static void ixgb_configure_tx(struct ixgb_adapter *adapter); |
| static void ixgb_configure_rx(struct ixgb_adapter *adapter); |
| static void ixgb_setup_rctl(struct ixgb_adapter *adapter); |
| static void ixgb_clean_tx_ring(struct ixgb_adapter *adapter); |
| static void ixgb_clean_rx_ring(struct ixgb_adapter *adapter); |
| static void ixgb_set_multi(struct net_device *netdev); |
| static void ixgb_watchdog(unsigned long data); |
| static netdev_tx_t ixgb_xmit_frame(struct sk_buff *skb, |
| struct net_device *netdev); |
| static struct net_device_stats *ixgb_get_stats(struct net_device *netdev); |
| static int ixgb_change_mtu(struct net_device *netdev, int new_mtu); |
| static int ixgb_set_mac(struct net_device *netdev, void *p); |
| static irqreturn_t ixgb_intr(int irq, void *data); |
| static bool ixgb_clean_tx_irq(struct ixgb_adapter *adapter); |
| |
| static int ixgb_clean(struct napi_struct *, int); |
| static bool ixgb_clean_rx_irq(struct ixgb_adapter *, int *, int); |
| static void ixgb_alloc_rx_buffers(struct ixgb_adapter *, int); |
| |
| static void ixgb_tx_timeout(struct net_device *dev); |
| static void ixgb_tx_timeout_task(struct work_struct *work); |
| |
| static void ixgb_vlan_strip_enable(struct ixgb_adapter *adapter); |
| static void ixgb_vlan_strip_disable(struct ixgb_adapter *adapter); |
| static void ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid); |
| static void ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid); |
| static void ixgb_restore_vlan(struct ixgb_adapter *adapter); |
| |
| #ifdef CONFIG_NET_POLL_CONTROLLER |
| /* for netdump / net console */ |
| static void ixgb_netpoll(struct net_device *dev); |
| #endif |
| |
| static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev, |
| enum pci_channel_state state); |
| static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev); |
| static void ixgb_io_resume (struct pci_dev *pdev); |
| |
| static struct pci_error_handlers ixgb_err_handler = { |
| .error_detected = ixgb_io_error_detected, |
| .slot_reset = ixgb_io_slot_reset, |
| .resume = ixgb_io_resume, |
| }; |
| |
| static struct pci_driver ixgb_driver = { |
| .name = ixgb_driver_name, |
| .id_table = ixgb_pci_tbl, |
| .probe = ixgb_probe, |
| .remove = __devexit_p(ixgb_remove), |
| .err_handler = &ixgb_err_handler |
| }; |
| |
| MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>"); |
| MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver"); |
| MODULE_LICENSE("GPL"); |
| MODULE_VERSION(DRV_VERSION); |
| |
| #define DEFAULT_DEBUG_LEVEL_SHIFT 3 |
| static int debug = DEFAULT_DEBUG_LEVEL_SHIFT; |
| module_param(debug, int, 0); |
| MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); |
| |
| /** |
| * ixgb_init_module - Driver Registration Routine |
| * |
| * ixgb_init_module is the first routine called when the driver is |
| * loaded. All it does is register with the PCI subsystem. |
| **/ |
| |
| static int __init |
| ixgb_init_module(void) |
| { |
| pr_info("%s - version %s\n", ixgb_driver_string, ixgb_driver_version); |
| pr_info("%s\n", ixgb_copyright); |
| |
| return pci_register_driver(&ixgb_driver); |
| } |
| |
| module_init(ixgb_init_module); |
| |
| /** |
| * ixgb_exit_module - Driver Exit Cleanup Routine |
| * |
| * ixgb_exit_module is called just before the driver is removed |
| * from memory. |
| **/ |
| |
| static void __exit |
| ixgb_exit_module(void) |
| { |
| pci_unregister_driver(&ixgb_driver); |
| } |
| |
| module_exit(ixgb_exit_module); |
| |
| /** |
| * ixgb_irq_disable - Mask off interrupt generation on the NIC |
| * @adapter: board private structure |
| **/ |
| |
| static void |
| ixgb_irq_disable(struct ixgb_adapter *adapter) |
| { |
| IXGB_WRITE_REG(&adapter->hw, IMC, ~0); |
| IXGB_WRITE_FLUSH(&adapter->hw); |
| synchronize_irq(adapter->pdev->irq); |
| } |
| |
| /** |
| * ixgb_irq_enable - Enable default interrupt generation settings |
| * @adapter: board private structure |
| **/ |
| |
| static void |
| ixgb_irq_enable(struct ixgb_adapter *adapter) |
| { |
| u32 val = IXGB_INT_RXT0 | IXGB_INT_RXDMT0 | |
| IXGB_INT_TXDW | IXGB_INT_LSC; |
| if (adapter->hw.subsystem_vendor_id == SUN_SUBVENDOR_ID) |
| val |= IXGB_INT_GPI0; |
| IXGB_WRITE_REG(&adapter->hw, IMS, val); |
| IXGB_WRITE_FLUSH(&adapter->hw); |
| } |
| |
| int |
| ixgb_up(struct ixgb_adapter *adapter) |
| { |
| struct net_device *netdev = adapter->netdev; |
| int err, irq_flags = IRQF_SHARED; |
| int max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH; |
| struct ixgb_hw *hw = &adapter->hw; |
| |
| /* hardware has been reset, we need to reload some things */ |
| |
| ixgb_rar_set(hw, netdev->dev_addr, 0); |
| ixgb_set_multi(netdev); |
| |
| ixgb_restore_vlan(adapter); |
| |
| ixgb_configure_tx(adapter); |
| ixgb_setup_rctl(adapter); |
| ixgb_configure_rx(adapter); |
| ixgb_alloc_rx_buffers(adapter, IXGB_DESC_UNUSED(&adapter->rx_ring)); |
| |
| /* disable interrupts and get the hardware into a known state */ |
| IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff); |
| |
| /* only enable MSI if bus is in PCI-X mode */ |
| if (IXGB_READ_REG(&adapter->hw, STATUS) & IXGB_STATUS_PCIX_MODE) { |
| err = pci_enable_msi(adapter->pdev); |
| if (!err) { |
| adapter->have_msi = 1; |
| irq_flags = 0; |
| } |
| /* proceed to try to request regular interrupt */ |
| } |
| |
| err = request_irq(adapter->pdev->irq, ixgb_intr, irq_flags, |
| netdev->name, netdev); |
| if (err) { |
| if (adapter->have_msi) |
| pci_disable_msi(adapter->pdev); |
| netif_err(adapter, probe, adapter->netdev, |
| "Unable to allocate interrupt Error: %d\n", err); |
| return err; |
| } |
| |
| if ((hw->max_frame_size != max_frame) || |
| (hw->max_frame_size != |
| (IXGB_READ_REG(hw, MFS) >> IXGB_MFS_SHIFT))) { |
| |
| hw->max_frame_size = max_frame; |
| |
| IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT); |
| |
| if (hw->max_frame_size > |
| IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) { |
| u32 ctrl0 = IXGB_READ_REG(hw, CTRL0); |
| |
| if (!(ctrl0 & IXGB_CTRL0_JFE)) { |
| ctrl0 |= IXGB_CTRL0_JFE; |
| IXGB_WRITE_REG(hw, CTRL0, ctrl0); |
| } |
| } |
| } |
| |
| clear_bit(__IXGB_DOWN, &adapter->flags); |
| |
| napi_enable(&adapter->napi); |
| ixgb_irq_enable(adapter); |
| |
| netif_wake_queue(netdev); |
| |
| mod_timer(&adapter->watchdog_timer, jiffies); |
| |
| return 0; |
| } |
| |
| void |
| ixgb_down(struct ixgb_adapter *adapter, bool kill_watchdog) |
| { |
| struct net_device *netdev = adapter->netdev; |
| |
| /* prevent the interrupt handler from restarting watchdog */ |
| set_bit(__IXGB_DOWN, &adapter->flags); |
| |
| napi_disable(&adapter->napi); |
| /* waiting for NAPI to complete can re-enable interrupts */ |
| ixgb_irq_disable(adapter); |
| free_irq(adapter->pdev->irq, netdev); |
| |
| if (adapter->have_msi) |
| pci_disable_msi(adapter->pdev); |
| |
| if (kill_watchdog) |
| del_timer_sync(&adapter->watchdog_timer); |
| |
| adapter->link_speed = 0; |
| adapter->link_duplex = 0; |
| netif_carrier_off(netdev); |
| netif_stop_queue(netdev); |
| |
| ixgb_reset(adapter); |
| ixgb_clean_tx_ring(adapter); |
| ixgb_clean_rx_ring(adapter); |
| } |
| |
| void |
| ixgb_reset(struct ixgb_adapter *adapter) |
| { |
| struct ixgb_hw *hw = &adapter->hw; |
| |
| ixgb_adapter_stop(hw); |
| if (!ixgb_init_hw(hw)) |
| netif_err(adapter, probe, adapter->netdev, "ixgb_init_hw failed\n"); |
| |
| /* restore frame size information */ |
| IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT); |
| if (hw->max_frame_size > |
| IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) { |
| u32 ctrl0 = IXGB_READ_REG(hw, CTRL0); |
| if (!(ctrl0 & IXGB_CTRL0_JFE)) { |
| ctrl0 |= IXGB_CTRL0_JFE; |
| IXGB_WRITE_REG(hw, CTRL0, ctrl0); |
| } |
| } |
| } |
| |
| static const struct net_device_ops ixgb_netdev_ops = { |
| .ndo_open = ixgb_open, |
| .ndo_stop = ixgb_close, |
| .ndo_start_xmit = ixgb_xmit_frame, |
| .ndo_get_stats = ixgb_get_stats, |
| .ndo_set_rx_mode = ixgb_set_multi, |
| .ndo_validate_addr = eth_validate_addr, |
| .ndo_set_mac_address = ixgb_set_mac, |
| .ndo_change_mtu = ixgb_change_mtu, |
| .ndo_tx_timeout = ixgb_tx_timeout, |
| .ndo_vlan_rx_add_vid = ixgb_vlan_rx_add_vid, |
| .ndo_vlan_rx_kill_vid = ixgb_vlan_rx_kill_vid, |
| #ifdef CONFIG_NET_POLL_CONTROLLER |
| .ndo_poll_controller = ixgb_netpoll, |
| #endif |
| }; |
| |
| /** |
| * ixgb_probe - Device Initialization Routine |
| * @pdev: PCI device information struct |
| * @ent: entry in ixgb_pci_tbl |
| * |
| * Returns 0 on success, negative on failure |
| * |
| * ixgb_probe initializes an adapter identified by a pci_dev structure. |
| * The OS initialization, configuring of the adapter private structure, |
| * and a hardware reset occur. |
| **/ |
| |
| static int __devinit |
| ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent) |
| { |
| struct net_device *netdev = NULL; |
| struct ixgb_adapter *adapter; |
| static int cards_found = 0; |
| int pci_using_dac; |
| int i; |
| int err; |
| |
| err = pci_enable_device(pdev); |
| if (err) |
| return err; |
| |
| pci_using_dac = 0; |
| err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)); |
| if (!err) { |
| err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64)); |
| if (!err) |
| pci_using_dac = 1; |
| } else { |
| err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); |
| if (err) { |
| err = dma_set_coherent_mask(&pdev->dev, |
| DMA_BIT_MASK(32)); |
| if (err) { |
| pr_err("No usable DMA configuration, aborting\n"); |
| goto err_dma_mask; |
| } |
| } |
| } |
| |
| err = pci_request_regions(pdev, ixgb_driver_name); |
| if (err) |
| goto err_request_regions; |
| |
| pci_set_master(pdev); |
| |
| netdev = alloc_etherdev(sizeof(struct ixgb_adapter)); |
| if (!netdev) { |
| err = -ENOMEM; |
| goto err_alloc_etherdev; |
| } |
| |
| SET_NETDEV_DEV(netdev, &pdev->dev); |
| |
| pci_set_drvdata(pdev, netdev); |
| adapter = netdev_priv(netdev); |
| adapter->netdev = netdev; |
| adapter->pdev = pdev; |
| adapter->hw.back = adapter; |
| adapter->msg_enable = netif_msg_init(debug, DEFAULT_DEBUG_LEVEL_SHIFT); |
| |
| adapter->hw.hw_addr = pci_ioremap_bar(pdev, BAR_0); |
| if (!adapter->hw.hw_addr) { |
| err = -EIO; |
| goto err_ioremap; |
| } |
| |
| for (i = BAR_1; i <= BAR_5; i++) { |
| if (pci_resource_len(pdev, i) == 0) |
| continue; |
| if (pci_resource_flags(pdev, i) & IORESOURCE_IO) { |
| adapter->hw.io_base = pci_resource_start(pdev, i); |
| break; |
| } |
| } |
| |
| netdev->netdev_ops = &ixgb_netdev_ops; |
| ixgb_set_ethtool_ops(netdev); |
| netdev->watchdog_timeo = 5 * HZ; |
| netif_napi_add(netdev, &adapter->napi, ixgb_clean, 64); |
| |
| strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1); |
| |
| adapter->bd_number = cards_found; |
| adapter->link_speed = 0; |
| adapter->link_duplex = 0; |
| |
| /* setup the private structure */ |
| |
| err = ixgb_sw_init(adapter); |
| if (err) |
| goto err_sw_init; |
| |
| netdev->features = NETIF_F_SG | |
| NETIF_F_HW_CSUM | |
| NETIF_F_HW_VLAN_TX | |
| NETIF_F_HW_VLAN_RX | |
| NETIF_F_HW_VLAN_FILTER; |
| netdev->features |= NETIF_F_TSO; |
| |
| if (pci_using_dac) { |
| netdev->features |= NETIF_F_HIGHDMA; |
| netdev->vlan_features |= NETIF_F_HIGHDMA; |
| } |
| |
| /* make sure the EEPROM is good */ |
| |
| if (!ixgb_validate_eeprom_checksum(&adapter->hw)) { |
| netif_err(adapter, probe, adapter->netdev, |
| "The EEPROM Checksum Is Not Valid\n"); |
| err = -EIO; |
| goto err_eeprom; |
| } |
| |
| ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr); |
| memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len); |
| |
| if (!is_valid_ether_addr(netdev->perm_addr)) { |
| netif_err(adapter, probe, adapter->netdev, "Invalid MAC Address\n"); |
| err = -EIO; |
| goto err_eeprom; |
| } |
| |
| adapter->part_num = ixgb_get_ee_pba_number(&adapter->hw); |
| |
| init_timer(&adapter->watchdog_timer); |
| adapter->watchdog_timer.function = ixgb_watchdog; |
| adapter->watchdog_timer.data = (unsigned long)adapter; |
| |
| INIT_WORK(&adapter->tx_timeout_task, ixgb_tx_timeout_task); |
| |
| strcpy(netdev->name, "eth%d"); |
| err = register_netdev(netdev); |
| if (err) |
| goto err_register; |
| |
| /* carrier off reporting is important to ethtool even BEFORE open */ |
| netif_carrier_off(netdev); |
| |
| netif_info(adapter, probe, adapter->netdev, |
| "Intel(R) PRO/10GbE Network Connection\n"); |
| ixgb_check_options(adapter); |
| /* reset the hardware with the new settings */ |
| |
| ixgb_reset(adapter); |
| |
| cards_found++; |
| return 0; |
| |
| err_register: |
| err_sw_init: |
| err_eeprom: |
| iounmap(adapter->hw.hw_addr); |
| err_ioremap: |
| free_netdev(netdev); |
| err_alloc_etherdev: |
| pci_release_regions(pdev); |
| err_request_regions: |
| err_dma_mask: |
| pci_disable_device(pdev); |
| return err; |
| } |
| |
| /** |
| * ixgb_remove - Device Removal Routine |
| * @pdev: PCI device information struct |
| * |
| * ixgb_remove is called by the PCI subsystem to alert the driver |
| * that it should release a PCI device. The could be caused by a |
| * Hot-Plug event, or because the driver is going to be removed from |
| * memory. |
| **/ |
| |
| static void __devexit |
| ixgb_remove(struct pci_dev *pdev) |
| { |
| struct net_device *netdev = pci_get_drvdata(pdev); |
| struct ixgb_adapter *adapter = netdev_priv(netdev); |
| |
| cancel_work_sync(&adapter->tx_timeout_task); |
| |
| unregister_netdev(netdev); |
| |
| iounmap(adapter->hw.hw_addr); |
| pci_release_regions(pdev); |
| |
| free_netdev(netdev); |
| pci_disable_device(pdev); |
| } |
| |
| /** |
| * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter) |
| * @adapter: board private structure to initialize |
| * |
| * ixgb_sw_init initializes the Adapter private data structure. |
| * Fields are initialized based on PCI device information and |
| * OS network device settings (MTU size). |
| **/ |
| |
| static int __devinit |
| ixgb_sw_init(struct ixgb_adapter *adapter) |
| { |
| struct ixgb_hw *hw = &adapter->hw; |
| struct net_device *netdev = adapter->netdev; |
| struct pci_dev *pdev = adapter->pdev; |
| |
| /* PCI config space info */ |
| |
| hw->vendor_id = pdev->vendor; |
| hw->device_id = pdev->device; |
| hw->subsystem_vendor_id = pdev->subsystem_vendor; |
| hw->subsystem_id = pdev->subsystem_device; |
| |
| hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH; |
| adapter->rx_buffer_len = hw->max_frame_size + 8; /* + 8 for errata */ |
| |
| if ((hw->device_id == IXGB_DEVICE_ID_82597EX) || |
| (hw->device_id == IXGB_DEVICE_ID_82597EX_CX4) || |
| (hw->device_id == IXGB_DEVICE_ID_82597EX_LR) || |
| (hw->device_id == IXGB_DEVICE_ID_82597EX_SR)) |
| hw->mac_type = ixgb_82597; |
| else { |
| /* should never have loaded on this device */ |
| netif_err(adapter, probe, adapter->netdev, "unsupported device id\n"); |
| } |
| |
| /* enable flow control to be programmed */ |
| hw->fc.send_xon = 1; |
| |
| set_bit(__IXGB_DOWN, &adapter->flags); |
| return 0; |
| } |
| |
| /** |
| * ixgb_open - Called when a network interface is made active |
| * @netdev: network interface device structure |
| * |
| * Returns 0 on success, negative value on failure |
| * |
| * The open entry point is called when a network interface is made |
| * active by the system (IFF_UP). At this point all resources needed |
| * for transmit and receive operations are allocated, the interrupt |
| * handler is registered with the OS, the watchdog timer is started, |
| * and the stack is notified that the interface is ready. |
| **/ |
| |
| static int |
| ixgb_open(struct net_device *netdev) |
| { |
| struct ixgb_adapter *adapter = netdev_priv(netdev); |
| int err; |
| |
| /* allocate transmit descriptors */ |
| err = ixgb_setup_tx_resources(adapter); |
| if (err) |
| goto err_setup_tx; |
| |
| netif_carrier_off(netdev); |
| |
| /* allocate receive descriptors */ |
| |
| err = ixgb_setup_rx_resources(adapter); |
| if (err) |
| goto err_setup_rx; |
| |
| err = ixgb_up(adapter); |
| if (err) |
| goto err_up; |
| |
| netif_start_queue(netdev); |
| |
| return 0; |
| |
| err_up: |
| ixgb_free_rx_resources(adapter); |
| err_setup_rx: |
| ixgb_free_tx_resources(adapter); |
| err_setup_tx: |
| ixgb_reset(adapter); |
| |
| return err; |
| } |
| |
| /** |
| * ixgb_close - Disables a network interface |
| * @netdev: network interface device structure |
| * |
| * Returns 0, this is not allowed to fail |
| * |
| * The close entry point is called when an interface is de-activated |
| * by the OS. The hardware is still under the drivers control, but |
| * needs to be disabled. A global MAC reset is issued to stop the |
| * hardware, and all transmit and receive resources are freed. |
| **/ |
| |
| static int |
| ixgb_close(struct net_device *netdev) |
| { |
| struct ixgb_adapter *adapter = netdev_priv(netdev); |
| |
| ixgb_down(adapter, true); |
| |
| ixgb_free_tx_resources(adapter); |
| ixgb_free_rx_resources(adapter); |
| |
| return 0; |
| } |
| |
| /** |
| * ixgb_setup_tx_resources - allocate Tx resources (Descriptors) |
| * @adapter: board private structure |
| * |
| * Return 0 on success, negative on failure |
| **/ |
| |
| int |
| ixgb_setup_tx_resources(struct ixgb_adapter *adapter) |
| { |
| struct ixgb_desc_ring *txdr = &adapter->tx_ring; |
| struct pci_dev *pdev = adapter->pdev; |
| int size; |
| |
| size = sizeof(struct ixgb_buffer) * txdr->count; |
| txdr->buffer_info = vzalloc(size); |
| if (!txdr->buffer_info) { |
| netif_err(adapter, probe, adapter->netdev, |
| "Unable to allocate transmit descriptor ring memory\n"); |
| return -ENOMEM; |
| } |
| |
| /* round up to nearest 4K */ |
| |
| txdr->size = txdr->count * sizeof(struct ixgb_tx_desc); |
| txdr->size = ALIGN(txdr->size, 4096); |
| |
| txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma, |
| GFP_KERNEL); |
| if (!txdr->desc) { |
| vfree(txdr->buffer_info); |
| netif_err(adapter, probe, adapter->netdev, |
| "Unable to allocate transmit descriptor memory\n"); |
| return -ENOMEM; |
| } |
| memset(txdr->desc, 0, txdr->size); |
| |
| txdr->next_to_use = 0; |
| txdr->next_to_clean = 0; |
| |
| return 0; |
| } |
| |
| /** |
| * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset. |
| * @adapter: board private structure |
| * |
| * Configure the Tx unit of the MAC after a reset. |
| **/ |
| |
| static void |
| ixgb_configure_tx(struct ixgb_adapter *adapter) |
| { |
| u64 tdba = adapter->tx_ring.dma; |
| u32 tdlen = adapter->tx_ring.count * sizeof(struct ixgb_tx_desc); |
| u32 tctl; |
| struct ixgb_hw *hw = &adapter->hw; |
| |
| /* Setup the Base and Length of the Tx Descriptor Ring |
| * tx_ring.dma can be either a 32 or 64 bit value |
| */ |
| |
| IXGB_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL)); |
| IXGB_WRITE_REG(hw, TDBAH, (tdba >> 32)); |
| |
| IXGB_WRITE_REG(hw, TDLEN, tdlen); |
| |
| /* Setup the HW Tx Head and Tail descriptor pointers */ |
| |
| IXGB_WRITE_REG(hw, TDH, 0); |
| IXGB_WRITE_REG(hw, TDT, 0); |
| |
| /* don't set up txdctl, it induces performance problems if configured |
| * incorrectly */ |
| /* Set the Tx Interrupt Delay register */ |
| |
| IXGB_WRITE_REG(hw, TIDV, adapter->tx_int_delay); |
| |
| /* Program the Transmit Control Register */ |
| |
| tctl = IXGB_TCTL_TCE | IXGB_TCTL_TXEN | IXGB_TCTL_TPDE; |
| IXGB_WRITE_REG(hw, TCTL, tctl); |
| |
| /* Setup Transmit Descriptor Settings for this adapter */ |
| adapter->tx_cmd_type = |
| IXGB_TX_DESC_TYPE | |
| (adapter->tx_int_delay_enable ? IXGB_TX_DESC_CMD_IDE : 0); |
| } |
| |
| /** |
| * ixgb_setup_rx_resources - allocate Rx resources (Descriptors) |
| * @adapter: board private structure |
| * |
| * Returns 0 on success, negative on failure |
| **/ |
| |
| int |
| ixgb_setup_rx_resources(struct ixgb_adapter *adapter) |
| { |
| struct ixgb_desc_ring *rxdr = &adapter->rx_ring; |
| struct pci_dev *pdev = adapter->pdev; |
| int size; |
| |
| size = sizeof(struct ixgb_buffer) * rxdr->count; |
| rxdr->buffer_info = vzalloc(size); |
| if (!rxdr->buffer_info) { |
| netif_err(adapter, probe, adapter->netdev, |
| "Unable to allocate receive descriptor ring\n"); |
| return -ENOMEM; |
| } |
| |
| /* Round up to nearest 4K */ |
| |
| rxdr->size = rxdr->count * sizeof(struct ixgb_rx_desc); |
| rxdr->size = ALIGN(rxdr->size, 4096); |
| |
| rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma, |
| GFP_KERNEL); |
| |
| if (!rxdr->desc) { |
| vfree(rxdr->buffer_info); |
| netif_err(adapter, probe, adapter->netdev, |
| "Unable to allocate receive descriptors\n"); |
| return -ENOMEM; |
| } |
| memset(rxdr->desc, 0, rxdr->size); |
| |
| rxdr->next_to_clean = 0; |
| rxdr->next_to_use = 0; |
| |
| return 0; |
| } |
| |
| /** |
| * ixgb_setup_rctl - configure the receive control register |
| * @adapter: Board private structure |
| **/ |
| |
| static void |
| ixgb_setup_rctl(struct ixgb_adapter *adapter) |
| { |
| u32 rctl; |
| |
| rctl = IXGB_READ_REG(&adapter->hw, RCTL); |
| |
| rctl &= ~(3 << IXGB_RCTL_MO_SHIFT); |
| |
| rctl |= |
| IXGB_RCTL_BAM | IXGB_RCTL_RDMTS_1_2 | |
| IXGB_RCTL_RXEN | IXGB_RCTL_CFF | |
| (adapter->hw.mc_filter_type << IXGB_RCTL_MO_SHIFT); |
| |
| rctl |= IXGB_RCTL_SECRC; |
| |
| if (adapter->rx_buffer_len <= IXGB_RXBUFFER_2048) |
| rctl |= IXGB_RCTL_BSIZE_2048; |
| else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_4096) |
| rctl |= IXGB_RCTL_BSIZE_4096; |
| else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_8192) |
| rctl |= IXGB_RCTL_BSIZE_8192; |
| else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_16384) |
| rctl |= IXGB_RCTL_BSIZE_16384; |
| |
| IXGB_WRITE_REG(&adapter->hw, RCTL, rctl); |
| } |
| |
| /** |
| * ixgb_configure_rx - Configure 82597 Receive Unit after Reset. |
| * @adapter: board private structure |
| * |
| * Configure the Rx unit of the MAC after a reset. |
| **/ |
| |
| static void |
| ixgb_configure_rx(struct ixgb_adapter *adapter) |
| { |
| u64 rdba = adapter->rx_ring.dma; |
| u32 rdlen = adapter->rx_ring.count * sizeof(struct ixgb_rx_desc); |
| struct ixgb_hw *hw = &adapter->hw; |
| u32 rctl; |
| u32 rxcsum; |
| |
| /* make sure receives are disabled while setting up the descriptors */ |
| |
| rctl = IXGB_READ_REG(hw, RCTL); |
| IXGB_WRITE_REG(hw, RCTL, rctl & ~IXGB_RCTL_RXEN); |
| |
| /* set the Receive Delay Timer Register */ |
| |
| IXGB_WRITE_REG(hw, RDTR, adapter->rx_int_delay); |
| |
| /* Setup the Base and Length of the Rx Descriptor Ring */ |
| |
| IXGB_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL)); |
| IXGB_WRITE_REG(hw, RDBAH, (rdba >> 32)); |
| |
| IXGB_WRITE_REG(hw, RDLEN, rdlen); |
| |
| /* Setup the HW Rx Head and Tail Descriptor Pointers */ |
| IXGB_WRITE_REG(hw, RDH, 0); |
| IXGB_WRITE_REG(hw, RDT, 0); |
| |
| /* due to the hardware errata with RXDCTL, we are unable to use any of |
| * the performance enhancing features of it without causing other |
| * subtle bugs, some of the bugs could include receive length |
| * corruption at high data rates (WTHRESH > 0) and/or receive |
| * descriptor ring irregularites (particularly in hardware cache) */ |
| IXGB_WRITE_REG(hw, RXDCTL, 0); |
| |
| /* Enable Receive Checksum Offload for TCP and UDP */ |
| if (adapter->rx_csum) { |
| rxcsum = IXGB_READ_REG(hw, RXCSUM); |
| rxcsum |= IXGB_RXCSUM_TUOFL; |
| IXGB_WRITE_REG(hw, RXCSUM, rxcsum); |
| } |
| |
| /* Enable Receives */ |
| |
| IXGB_WRITE_REG(hw, RCTL, rctl); |
| } |
| |
| /** |
| * ixgb_free_tx_resources - Free Tx Resources |
| * @adapter: board private structure |
| * |
| * Free all transmit software resources |
| **/ |
| |
| void |
| ixgb_free_tx_resources(struct ixgb_adapter *adapter) |
| { |
| struct pci_dev *pdev = adapter->pdev; |
| |
| ixgb_clean_tx_ring(adapter); |
| |
| vfree(adapter->tx_ring.buffer_info); |
| adapter->tx_ring.buffer_info = NULL; |
| |
| dma_free_coherent(&pdev->dev, adapter->tx_ring.size, |
| adapter->tx_ring.desc, adapter->tx_ring.dma); |
| |
| adapter->tx_ring.desc = NULL; |
| } |
| |
| static void |
| ixgb_unmap_and_free_tx_resource(struct ixgb_adapter *adapter, |
| struct ixgb_buffer *buffer_info) |
| { |
| if (buffer_info->dma) { |
| if (buffer_info->mapped_as_page) |
| dma_unmap_page(&adapter->pdev->dev, buffer_info->dma, |
| buffer_info->length, DMA_TO_DEVICE); |
| else |
| dma_unmap_single(&adapter->pdev->dev, buffer_info->dma, |
| buffer_info->length, DMA_TO_DEVICE); |
| buffer_info->dma = 0; |
| } |
| |
| if (buffer_info->skb) { |
| dev_kfree_skb_any(buffer_info->skb); |
| buffer_info->skb = NULL; |
| } |
| buffer_info->time_stamp = 0; |
| /* these fields must always be initialized in tx |
| * buffer_info->length = 0; |
| * buffer_info->next_to_watch = 0; */ |
| } |
| |
| /** |
| * ixgb_clean_tx_ring - Free Tx Buffers |
| * @adapter: board private structure |
| **/ |
| |
| static void |
| ixgb_clean_tx_ring(struct ixgb_adapter *adapter) |
| { |
| struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; |
| struct ixgb_buffer *buffer_info; |
| unsigned long size; |
| unsigned int i; |
| |
| /* Free all the Tx ring sk_buffs */ |
| |
| for (i = 0; i < tx_ring->count; i++) { |
| buffer_info = &tx_ring->buffer_info[i]; |
| ixgb_unmap_and_free_tx_resource(adapter, buffer_info); |
| } |
| |
| size = sizeof(struct ixgb_buffer) * tx_ring->count; |
| memset(tx_ring->buffer_info, 0, size); |
| |
| /* Zero out the descriptor ring */ |
| |
| memset(tx_ring->desc, 0, tx_ring->size); |
| |
| tx_ring->next_to_use = 0; |
| tx_ring->next_to_clean = 0; |
| |
| IXGB_WRITE_REG(&adapter->hw, TDH, 0); |
| IXGB_WRITE_REG(&adapter->hw, TDT, 0); |
| } |
| |
| /** |
| * ixgb_free_rx_resources - Free Rx Resources |
| * @adapter: board private structure |
| * |
| * Free all receive software resources |
| **/ |
| |
| void |
| ixgb_free_rx_resources(struct ixgb_adapter *adapter) |
| { |
| struct ixgb_desc_ring *rx_ring = &adapter->rx_ring; |
| struct pci_dev *pdev = adapter->pdev; |
| |
| ixgb_clean_rx_ring(adapter); |
| |
| vfree(rx_ring->buffer_info); |
| rx_ring->buffer_info = NULL; |
| |
| dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc, |
| rx_ring->dma); |
| |
| rx_ring->desc = NULL; |
| } |
| |
| /** |
| * ixgb_clean_rx_ring - Free Rx Buffers |
| * @adapter: board private structure |
| **/ |
| |
| static void |
| ixgb_clean_rx_ring(struct ixgb_adapter *adapter) |
| { |
| struct ixgb_desc_ring *rx_ring = &adapter->rx_ring; |
| struct ixgb_buffer *buffer_info; |
| struct pci_dev *pdev = adapter->pdev; |
| unsigned long size; |
| unsigned int i; |
| |
| /* Free all the Rx ring sk_buffs */ |
| |
| for (i = 0; i < rx_ring->count; i++) { |
| buffer_info = &rx_ring->buffer_info[i]; |
| if (buffer_info->dma) { |
| dma_unmap_single(&pdev->dev, |
| buffer_info->dma, |
| buffer_info->length, |
| DMA_FROM_DEVICE); |
| buffer_info->dma = 0; |
| buffer_info->length = 0; |
| } |
| |
| if (buffer_info->skb) { |
| dev_kfree_skb(buffer_info->skb); |
| buffer_info->skb = NULL; |
| } |
| } |
| |
| size = sizeof(struct ixgb_buffer) * rx_ring->count; |
| memset(rx_ring->buffer_info, 0, size); |
| |
| /* Zero out the descriptor ring */ |
| |
| memset(rx_ring->desc, 0, rx_ring->size); |
| |
| rx_ring->next_to_clean = 0; |
| rx_ring->next_to_use = 0; |
| |
| IXGB_WRITE_REG(&adapter->hw, RDH, 0); |
| IXGB_WRITE_REG(&adapter->hw, RDT, 0); |
| } |
| |
| /** |
| * ixgb_set_mac - Change the Ethernet Address of the NIC |
| * @netdev: network interface device structure |
| * @p: pointer to an address structure |
| * |
| * Returns 0 on success, negative on failure |
| **/ |
| |
| static int |
| ixgb_set_mac(struct net_device *netdev, void *p) |
| { |
| struct ixgb_adapter *adapter = netdev_priv(netdev); |
| struct sockaddr *addr = p; |
| |
| if (!is_valid_ether_addr(addr->sa_data)) |
| return -EADDRNOTAVAIL; |
| |
| memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); |
| |
| ixgb_rar_set(&adapter->hw, addr->sa_data, 0); |
| |
| return 0; |
| } |
| |
| /** |
| * ixgb_set_multi - Multicast and Promiscuous mode set |
| * @netdev: network interface device structure |
| * |
| * The set_multi entry point is called whenever the multicast address |
| * list or the network interface flags are updated. This routine is |
| * responsible for configuring the hardware for proper multicast, |
| * promiscuous mode, and all-multi behavior. |
| **/ |
| |
| static void |
| ixgb_set_multi(struct net_device *netdev) |
| { |
| struct ixgb_adapter *adapter = netdev_priv(netdev); |
| struct ixgb_hw *hw = &adapter->hw; |
| struct netdev_hw_addr *ha; |
| u32 rctl; |
| int i; |
| |
| /* Check for Promiscuous and All Multicast modes */ |
| |
| rctl = IXGB_READ_REG(hw, RCTL); |
| |
| if (netdev->flags & IFF_PROMISC) { |
| rctl |= (IXGB_RCTL_UPE | IXGB_RCTL_MPE); |
| /* disable VLAN filtering */ |
| rctl &= ~IXGB_RCTL_CFIEN; |
| rctl &= ~IXGB_RCTL_VFE; |
| } else { |
| if (netdev->flags & IFF_ALLMULTI) { |
| rctl |= IXGB_RCTL_MPE; |
| rctl &= ~IXGB_RCTL_UPE; |
| } else { |
| rctl &= ~(IXGB_RCTL_UPE | IXGB_RCTL_MPE); |
| } |
| /* enable VLAN filtering */ |
| rctl |= IXGB_RCTL_VFE; |
| rctl &= ~IXGB_RCTL_CFIEN; |
| } |
| |
| if (netdev_mc_count(netdev) > IXGB_MAX_NUM_MULTICAST_ADDRESSES) { |
| rctl |= IXGB_RCTL_MPE; |
| IXGB_WRITE_REG(hw, RCTL, rctl); |
| } else { |
| u8 mta[IXGB_MAX_NUM_MULTICAST_ADDRESSES * |
| IXGB_ETH_LENGTH_OF_ADDRESS]; |
| |
| IXGB_WRITE_REG(hw, RCTL, rctl); |
| |
| i = 0; |
| netdev_for_each_mc_addr(ha, netdev) |
| memcpy(&mta[i++ * IXGB_ETH_LENGTH_OF_ADDRESS], |
| ha->addr, IXGB_ETH_LENGTH_OF_ADDRESS); |
| |
| ixgb_mc_addr_list_update(hw, mta, netdev_mc_count(netdev), 0); |
| } |
| |
| if (netdev->features & NETIF_F_HW_VLAN_RX) |
| ixgb_vlan_strip_enable(adapter); |
| else |
| ixgb_vlan_strip_disable(adapter); |
| |
| } |
| |
| /** |
| * ixgb_watchdog - Timer Call-back |
| * @data: pointer to netdev cast into an unsigned long |
| **/ |
| |
| static void |
| ixgb_watchdog(unsigned long data) |
| { |
| struct ixgb_adapter *adapter = (struct ixgb_adapter *)data; |
| struct net_device *netdev = adapter->netdev; |
| struct ixgb_desc_ring *txdr = &adapter->tx_ring; |
| |
| ixgb_check_for_link(&adapter->hw); |
| |
| if (ixgb_check_for_bad_link(&adapter->hw)) { |
| /* force the reset path */ |
| netif_stop_queue(netdev); |
| } |
| |
| if (adapter->hw.link_up) { |
| if (!netif_carrier_ok(netdev)) { |
| netdev_info(netdev, |
| "NIC Link is Up 10 Gbps Full Duplex, Flow Control: %s\n", |
| (adapter->hw.fc.type == ixgb_fc_full) ? |
| "RX/TX" : |
| (adapter->hw.fc.type == ixgb_fc_rx_pause) ? |
| "RX" : |
| (adapter->hw.fc.type == ixgb_fc_tx_pause) ? |
| "TX" : "None"); |
| adapter->link_speed = 10000; |
| adapter->link_duplex = FULL_DUPLEX; |
| netif_carrier_on(netdev); |
| } |
| } else { |
| if (netif_carrier_ok(netdev)) { |
| adapter->link_speed = 0; |
| adapter->link_duplex = 0; |
| netdev_info(netdev, "NIC Link is Down\n"); |
| netif_carrier_off(netdev); |
| } |
| } |
| |
| ixgb_update_stats(adapter); |
| |
| if (!netif_carrier_ok(netdev)) { |
| if (IXGB_DESC_UNUSED(txdr) + 1 < txdr->count) { |
| /* We've lost link, so the controller stops DMA, |
| * but we've got queued Tx work that's never going |
| * to get done, so reset controller to flush Tx. |
| * (Do the reset outside of interrupt context). */ |
| schedule_work(&adapter->tx_timeout_task); |
| /* return immediately since reset is imminent */ |
| return; |
| } |
| } |
| |
| /* Force detection of hung controller every watchdog period */ |
| adapter->detect_tx_hung = true; |
| |
| /* generate an interrupt to force clean up of any stragglers */ |
| IXGB_WRITE_REG(&adapter->hw, ICS, IXGB_INT_TXDW); |
| |
| /* Reset the timer */ |
| mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ); |
| } |
| |
| #define IXGB_TX_FLAGS_CSUM 0x00000001 |
| #define IXGB_TX_FLAGS_VLAN 0x00000002 |
| #define IXGB_TX_FLAGS_TSO 0x00000004 |
| |
| static int |
| ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb) |
| { |
| struct ixgb_context_desc *context_desc; |
| unsigned int i; |
| u8 ipcss, ipcso, tucss, tucso, hdr_len; |
| u16 ipcse, tucse, mss; |
| int err; |
| |
| if (likely(skb_is_gso(skb))) { |
| struct ixgb_buffer *buffer_info; |
| struct iphdr *iph; |
| |
| if (skb_header_cloned(skb)) { |
| err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); |
| if (err) |
| return err; |
| } |
| |
| hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); |
| mss = skb_shinfo(skb)->gso_size; |
| iph = ip_hdr(skb); |
| iph->tot_len = 0; |
| iph->check = 0; |
| tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, |
| iph->daddr, 0, |
| IPPROTO_TCP, 0); |
| ipcss = skb_network_offset(skb); |
| ipcso = (void *)&(iph->check) - (void *)skb->data; |
| ipcse = skb_transport_offset(skb) - 1; |
| tucss = skb_transport_offset(skb); |
| tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data; |
| tucse = 0; |
| |
| i = adapter->tx_ring.next_to_use; |
| context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i); |
| buffer_info = &adapter->tx_ring.buffer_info[i]; |
| WARN_ON(buffer_info->dma != 0); |
| |
| context_desc->ipcss = ipcss; |
| context_desc->ipcso = ipcso; |
| context_desc->ipcse = cpu_to_le16(ipcse); |
| context_desc->tucss = tucss; |
| context_desc->tucso = tucso; |
| context_desc->tucse = cpu_to_le16(tucse); |
| context_desc->mss = cpu_to_le16(mss); |
| context_desc->hdr_len = hdr_len; |
| context_desc->status = 0; |
| context_desc->cmd_type_len = cpu_to_le32( |
| IXGB_CONTEXT_DESC_TYPE |
| | IXGB_CONTEXT_DESC_CMD_TSE |
| | IXGB_CONTEXT_DESC_CMD_IP |
| | IXGB_CONTEXT_DESC_CMD_TCP |
| | IXGB_CONTEXT_DESC_CMD_IDE |
| | (skb->len - (hdr_len))); |
| |
| |
| if (++i == adapter->tx_ring.count) i = 0; |
| adapter->tx_ring.next_to_use = i; |
| |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| static bool |
| ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb) |
| { |
| struct ixgb_context_desc *context_desc; |
| unsigned int i; |
| u8 css, cso; |
| |
| if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) { |
| struct ixgb_buffer *buffer_info; |
| css = skb_checksum_start_offset(skb); |
| cso = css + skb->csum_offset; |
| |
| i = adapter->tx_ring.next_to_use; |
| context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i); |
| buffer_info = &adapter->tx_ring.buffer_info[i]; |
| WARN_ON(buffer_info->dma != 0); |
| |
| context_desc->tucss = css; |
| context_desc->tucso = cso; |
| context_desc->tucse = 0; |
| /* zero out any previously existing data in one instruction */ |
| *(u32 *)&(context_desc->ipcss) = 0; |
| context_desc->status = 0; |
| context_desc->hdr_len = 0; |
| context_desc->mss = 0; |
| context_desc->cmd_type_len = |
| cpu_to_le32(IXGB_CONTEXT_DESC_TYPE |
| | IXGB_TX_DESC_CMD_IDE); |
| |
| if (++i == adapter->tx_ring.count) i = 0; |
| adapter->tx_ring.next_to_use = i; |
| |
| return true; |
| } |
| |
| return false; |
| } |
| |
| #define IXGB_MAX_TXD_PWR 14 |
| #define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR) |
| |
| static int |
| ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb, |
| unsigned int first) |
| { |
| struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; |
| struct pci_dev *pdev = adapter->pdev; |
| struct ixgb_buffer *buffer_info; |
| int len = skb_headlen(skb); |
| unsigned int offset = 0, size, count = 0, i; |
| unsigned int mss = skb_shinfo(skb)->gso_size; |
| unsigned int nr_frags = skb_shinfo(skb)->nr_frags; |
| unsigned int f; |
| |
| i = tx_ring->next_to_use; |
| |
| while (len) { |
| buffer_info = &tx_ring->buffer_info[i]; |
| size = min(len, IXGB_MAX_DATA_PER_TXD); |
| /* Workaround for premature desc write-backs |
| * in TSO mode. Append 4-byte sentinel desc */ |
| if (unlikely(mss && !nr_frags && size == len && size > 8)) |
| size -= 4; |
| |
| buffer_info->length = size; |
| WARN_ON(buffer_info->dma != 0); |
| buffer_info->time_stamp = jiffies; |
| buffer_info->mapped_as_page = false; |
| buffer_info->dma = dma_map_single(&pdev->dev, |
| skb->data + offset, |
| size, DMA_TO_DEVICE); |
| if (dma_mapping_error(&pdev->dev, buffer_info->dma)) |
| goto dma_error; |
| buffer_info->next_to_watch = 0; |
| |
| len -= size; |
| offset += size; |
| count++; |
| if (len) { |
| i++; |
| if (i == tx_ring->count) |
| i = 0; |
| } |
| } |
| |
| for (f = 0; f < nr_frags; f++) { |
| struct skb_frag_struct *frag; |
| |
| frag = &skb_shinfo(skb)->frags[f]; |
| len = frag->size; |
| offset = frag->page_offset; |
| |
| while (len) { |
| i++; |
| if (i == tx_ring->count) |
| i = 0; |
| |
| buffer_info = &tx_ring->buffer_info[i]; |
| size = min(len, IXGB_MAX_DATA_PER_TXD); |
| |
| /* Workaround for premature desc write-backs |
| * in TSO mode. Append 4-byte sentinel desc */ |
| if (unlikely(mss && (f == (nr_frags - 1)) |
| && size == len && size > 8)) |
| size -= 4; |
| |
| buffer_info->length = size; |
| buffer_info->time_stamp = jiffies; |
| buffer_info->mapped_as_page = true; |
| buffer_info->dma = |
| dma_map_page(&pdev->dev, frag->page, |
| offset, size, DMA_TO_DEVICE); |
| if (dma_mapping_error(&pdev->dev, buffer_info->dma)) |
| goto dma_error; |
| buffer_info->next_to_watch = 0; |
| |
| len -= size; |
| offset += size; |
| count++; |
| } |
| } |
| tx_ring->buffer_info[i].skb = skb; |
| tx_ring->buffer_info[first].next_to_watch = i; |
| |
| return count; |
| |
| dma_error: |
| dev_err(&pdev->dev, "TX DMA map failed\n"); |
| buffer_info->dma = 0; |
| if (count) |
| count--; |
| |
| while (count--) { |
| if (i==0) |
| i += tx_ring->count; |
| i--; |
| buffer_info = &tx_ring->buffer_info[i]; |
| ixgb_unmap_and_free_tx_resource(adapter, buffer_info); |
| } |
| |
| return 0; |
| } |
| |
| static void |
| ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,int tx_flags) |
| { |
| struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; |
| struct ixgb_tx_desc *tx_desc = NULL; |
| struct ixgb_buffer *buffer_info; |
| u32 cmd_type_len = adapter->tx_cmd_type; |
| u8 status = 0; |
| u8 popts = 0; |
| unsigned int i; |
| |
| if (tx_flags & IXGB_TX_FLAGS_TSO) { |
| cmd_type_len |= IXGB_TX_DESC_CMD_TSE; |
| popts |= (IXGB_TX_DESC_POPTS_IXSM | IXGB_TX_DESC_POPTS_TXSM); |
| } |
| |
| if (tx_flags & IXGB_TX_FLAGS_CSUM) |
| popts |= IXGB_TX_DESC_POPTS_TXSM; |
| |
| if (tx_flags & IXGB_TX_FLAGS_VLAN) |
| cmd_type_len |= IXGB_TX_DESC_CMD_VLE; |
| |
| i = tx_ring->next_to_use; |
| |
| while (count--) { |
| buffer_info = &tx_ring->buffer_info[i]; |
| tx_desc = IXGB_TX_DESC(*tx_ring, i); |
| tx_desc->buff_addr = cpu_to_le64(buffer_info->dma); |
| tx_desc->cmd_type_len = |
| cpu_to_le32(cmd_type_len | buffer_info->length); |
| tx_desc->status = status; |
| tx_desc->popts = popts; |
| tx_desc->vlan = cpu_to_le16(vlan_id); |
| |
| if (++i == tx_ring->count) i = 0; |
| } |
| |
| tx_desc->cmd_type_len |= |
| cpu_to_le32(IXGB_TX_DESC_CMD_EOP | IXGB_TX_DESC_CMD_RS); |
| |
| /* Force memory writes to complete before letting h/w |
| * know there are new descriptors to fetch. (Only |
| * applicable for weak-ordered memory model archs, |
| * such as IA-64). */ |
| wmb(); |
| |
| tx_ring->next_to_use = i; |
| IXGB_WRITE_REG(&adapter->hw, TDT, i); |
| } |
| |
| static int __ixgb_maybe_stop_tx(struct net_device *netdev, int size) |
| { |
| struct ixgb_adapter *adapter = netdev_priv(netdev); |
| struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; |
| |
| netif_stop_queue(netdev); |
| /* Herbert's original patch had: |
| * smp_mb__after_netif_stop_queue(); |
| * but since that doesn't exist yet, just open code it. */ |
| smp_mb(); |
| |
| /* We need to check again in a case another CPU has just |
| * made room available. */ |
| if (likely(IXGB_DESC_UNUSED(tx_ring) < size)) |
| return -EBUSY; |
| |
| /* A reprieve! */ |
| netif_start_queue(netdev); |
| ++adapter->restart_queue; |
| return 0; |
| } |
| |
| static int ixgb_maybe_stop_tx(struct net_device *netdev, |
| struct ixgb_desc_ring *tx_ring, int size) |
| { |
| if (likely(IXGB_DESC_UNUSED(tx_ring) >= size)) |
| return 0; |
| return __ixgb_maybe_stop_tx(netdev, size); |
| } |
| |
| |
| /* Tx Descriptors needed, worst case */ |
| #define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \ |
| (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0)) |
| #define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) /* skb->date */ + \ |
| MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 /* for context */ \ |
| + 1 /* one more needed for sentinel TSO workaround */ |
| |
| static netdev_tx_t |
| ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev) |
| { |
| struct ixgb_adapter *adapter = netdev_priv(netdev); |
| unsigned int first; |
| unsigned int tx_flags = 0; |
| int vlan_id = 0; |
| int count = 0; |
| int tso; |
| |
| if (test_bit(__IXGB_DOWN, &adapter->flags)) { |
| dev_kfree_skb(skb); |
| return NETDEV_TX_OK; |
| } |
| |
| if (skb->len <= 0) { |
| dev_kfree_skb(skb); |
| return NETDEV_TX_OK; |
| } |
| |
| if (unlikely(ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, |
| DESC_NEEDED))) |
| return NETDEV_TX_BUSY; |
| |
| if (vlan_tx_tag_present(skb)) { |
| tx_flags |= IXGB_TX_FLAGS_VLAN; |
| vlan_id = vlan_tx_tag_get(skb); |
| } |
| |
| first = adapter->tx_ring.next_to_use; |
| |
| tso = ixgb_tso(adapter, skb); |
| if (tso < 0) { |
| dev_kfree_skb(skb); |
| return NETDEV_TX_OK; |
| } |
| |
| if (likely(tso)) |
| tx_flags |= IXGB_TX_FLAGS_TSO; |
| else if (ixgb_tx_csum(adapter, skb)) |
| tx_flags |= IXGB_TX_FLAGS_CSUM; |
| |
| count = ixgb_tx_map(adapter, skb, first); |
| |
| if (count) { |
| ixgb_tx_queue(adapter, count, vlan_id, tx_flags); |
| /* Make sure there is space in the ring for the next send. */ |
| ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, DESC_NEEDED); |
| |
| } else { |
| dev_kfree_skb_any(skb); |
| adapter->tx_ring.buffer_info[first].time_stamp = 0; |
| adapter->tx_ring.next_to_use = first; |
| } |
| |
| return NETDEV_TX_OK; |
| } |
| |
| /** |
| * ixgb_tx_timeout - Respond to a Tx Hang |
| * @netdev: network interface device structure |
| **/ |
| |
| static void |
| ixgb_tx_timeout(struct net_device *netdev) |
| { |
| struct ixgb_adapter *adapter = netdev_priv(netdev); |
| |
| /* Do the reset outside of interrupt context */ |
| schedule_work(&adapter->tx_timeout_task); |
| } |
| |
| static void |
| ixgb_tx_timeout_task(struct work_struct *work) |
| { |
| struct ixgb_adapter *adapter = |
| container_of(work, struct ixgb_adapter, tx_timeout_task); |
| |
| adapter->tx_timeout_count++; |
| ixgb_down(adapter, true); |
| ixgb_up(adapter); |
| } |
| |
| /** |
| * ixgb_get_stats - Get System Network Statistics |
| * @netdev: network interface device structure |
| * |
| * Returns the address of the device statistics structure. |
| * The statistics are actually updated from the timer callback. |
| **/ |
| |
| static struct net_device_stats * |
| ixgb_get_stats(struct net_device *netdev) |
| { |
| return &netdev->stats; |
| } |
| |
| /** |
| * ixgb_change_mtu - Change the Maximum Transfer Unit |
| * @netdev: network interface device structure |
| * @new_mtu: new value for maximum frame size |
| * |
| * Returns 0 on success, negative on failure |
| **/ |
| |
| static int |
| ixgb_change_mtu(struct net_device *netdev, int new_mtu) |
| { |
| struct ixgb_adapter *adapter = netdev_priv(netdev); |
| int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH; |
| int old_max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH; |
| |
| /* MTU < 68 is an error for IPv4 traffic, just don't allow it */ |
| if ((new_mtu < 68) || |
| (max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) { |
| netif_err(adapter, probe, adapter->netdev, |
| "Invalid MTU setting %d\n", new_mtu); |
| return -EINVAL; |
| } |
| |
| if (old_max_frame == max_frame) |
| return 0; |
| |
| if (netif_running(netdev)) |
| ixgb_down(adapter, true); |
| |
| adapter->rx_buffer_len = max_frame + 8; /* + 8 for errata */ |
| |
| netdev->mtu = new_mtu; |
| |
| if (netif_running(netdev)) |
| ixgb_up(adapter); |
| |
| return 0; |
| } |
| |
| /** |
| * ixgb_update_stats - Update the board statistics counters. |
| * @adapter: board private structure |
| **/ |
| |
| void |
| ixgb_update_stats(struct ixgb_adapter *adapter) |
| { |
| struct net_device *netdev = adapter->netdev; |
| struct pci_dev *pdev = adapter->pdev; |
| |
| /* Prevent stats update while adapter is being reset */ |
| if (pci_channel_offline(pdev)) |
| return; |
| |
| if ((netdev->flags & IFF_PROMISC) || (netdev->flags & IFF_ALLMULTI) || |
| (netdev_mc_count(netdev) > IXGB_MAX_NUM_MULTICAST_ADDRESSES)) { |
| u64 multi = IXGB_READ_REG(&adapter->hw, MPRCL); |
| u32 bcast_l = IXGB_READ_REG(&adapter->hw, BPRCL); |
| u32 bcast_h = IXGB_READ_REG(&adapter->hw, BPRCH); |
| u64 bcast = ((u64)bcast_h << 32) | bcast_l; |
| |
| multi |= ((u64)IXGB_READ_REG(&adapter->hw, MPRCH) << 32); |
| /* fix up multicast stats by removing broadcasts */ |
| if (multi >= bcast) |
| multi -= bcast; |
| |
| adapter->stats.mprcl += (multi & 0xFFFFFFFF); |
| adapter->stats.mprch += (multi >> 32); |
| adapter->stats.bprcl += bcast_l; |
| adapter->stats.bprch += bcast_h; |
| } else { |
| adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL); |
| adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH); |
| adapter->stats.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL); |
| adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH); |
| } |
| adapter->stats.tprl += IXGB_READ_REG(&adapter->hw, TPRL); |
| adapter->stats.tprh += IXGB_READ_REG(&adapter->hw, TPRH); |
| adapter->stats.gprcl += IXGB_READ_REG(&adapter->hw, GPRCL); |
| adapter->stats.gprch += IXGB_READ_REG(&adapter->hw, GPRCH); |
| adapter->stats.uprcl += IXGB_READ_REG(&adapter->hw, UPRCL); |
| adapter->stats.uprch += IXGB_READ_REG(&adapter->hw, UPRCH); |
| adapter->stats.vprcl += IXGB_READ_REG(&adapter->hw, VPRCL); |
| adapter->stats.vprch += IXGB_READ_REG(&adapter->hw, VPRCH); |
| adapter->stats.jprcl += IXGB_READ_REG(&adapter->hw, JPRCL); |
| adapter->stats.jprch += IXGB_READ_REG(&adapter->hw, JPRCH); |
| adapter->stats.gorcl += IXGB_READ_REG(&adapter->hw, GORCL); |
| adapter->stats.gorch += IXGB_READ_REG(&adapter->hw, GORCH); |
| adapter->stats.torl += IXGB_READ_REG(&adapter->hw, TORL); |
| adapter->stats.torh += IXGB_READ_REG(&adapter->hw, TORH); |
| adapter->stats.rnbc += IXGB_READ_REG(&adapter->hw, RNBC); |
| adapter->stats.ruc += IXGB_READ_REG(&adapter->hw, RUC); |
| adapter->stats.roc += IXGB_READ_REG(&adapter->hw, ROC); |
| adapter->stats.rlec += IXGB_READ_REG(&adapter->hw, RLEC); |
| adapter->stats.crcerrs += IXGB_READ_REG(&adapter->hw, CRCERRS); |
| adapter->stats.icbc += IXGB_READ_REG(&adapter->hw, ICBC); |
| adapter->stats.ecbc += IXGB_READ_REG(&adapter->hw, ECBC); |
| adapter->stats.mpc += IXGB_READ_REG(&adapter->hw, MPC); |
| adapter->stats.tptl += IXGB_READ_REG(&adapter->hw, TPTL); |
| adapter->stats.tpth += IXGB_READ_REG(&adapter->hw, TPTH); |
| adapter->stats.gptcl += IXGB_READ_REG(&adapter->hw, GPTCL); |
| adapter->stats.gptch += IXGB_READ_REG(&adapter->hw, GPTCH); |
| adapter->stats.bptcl += IXGB_READ_REG(&adapter->hw, BPTCL); |
| adapter->stats.bptch += IXGB_READ_REG(&adapter->hw, BPTCH); |
| adapter->stats.mptcl += IXGB_READ_REG(&adapter->hw, MPTCL); |
| adapter->stats.mptch += IXGB_READ_REG(&adapter->hw, MPTCH); |
| adapter->stats.uptcl += IXGB_READ_REG(&adapter->hw, UPTCL); |
| adapter->stats.uptch += IXGB_READ_REG(&adapter->hw, UPTCH); |
| adapter->stats.vptcl += IXGB_READ_REG(&adapter->hw, VPTCL); |
| adapter->stats.vptch += IXGB_READ_REG(&adapter->hw, VPTCH); |
| adapter->stats.jptcl += IXGB_READ_REG(&adapter->hw, JPTCL); |
| adapter->stats.jptch += IXGB_READ_REG(&adapter->hw, JPTCH); |
| adapter->stats.gotcl += IXGB_READ_REG(&adapter->hw, GOTCL); |
| adapter->stats.gotch += IXGB_READ_REG(&adapter->hw, GOTCH); |
| adapter->stats.totl += IXGB_READ_REG(&adapter->hw, TOTL); |
| adapter->stats.toth += IXGB_READ_REG(&adapter->hw, TOTH); |
| adapter->stats.dc += IXGB_READ_REG(&adapter->hw, DC); |
| adapter->stats.plt64c += IXGB_READ_REG(&adapter->hw, PLT64C); |
| adapter->stats.tsctc += IXGB_READ_REG(&adapter->hw, TSCTC); |
| adapter->stats.tsctfc += IXGB_READ_REG(&adapter->hw, TSCTFC); |
| adapter->stats.ibic += IXGB_READ_REG(&adapter->hw, IBIC); |
| adapter->stats.rfc += IXGB_READ_REG(&adapter->hw, RFC); |
| adapter->stats.lfc += IXGB_READ_REG(&adapter->hw, LFC); |
| adapter->stats.pfrc += IXGB_READ_REG(&adapter->hw, PFRC); |
| adapter->stats.pftc += IXGB_READ_REG(&adapter->hw, PFTC); |
| adapter->stats.mcfrc += IXGB_READ_REG(&adapter->hw, MCFRC); |
| adapter->stats.mcftc += IXGB_READ_REG(&adapter->hw, MCFTC); |
| adapter->stats.xonrxc += IXGB_READ_REG(&adapter->hw, XONRXC); |
| adapter->stats.xontxc += IXGB_READ_REG(&adapter->hw, XONTXC); |
| adapter->stats.xoffrxc += IXGB_READ_REG(&adapter->hw, XOFFRXC); |
| adapter->stats.xofftxc += IXGB_READ_REG(&adapter->hw, XOFFTXC); |
| adapter->stats.rjc += IXGB_READ_REG(&adapter->hw, RJC); |
| |
| /* Fill out the OS statistics structure */ |
| |
| netdev->stats.rx_packets = adapter->stats.gprcl; |
| netdev->stats.tx_packets = adapter->stats.gptcl; |
| netdev->stats.rx_bytes = adapter->stats.gorcl; |
| netdev->stats.tx_bytes = adapter->stats.gotcl; |
| netdev->stats.multicast = adapter->stats.mprcl; |
| netdev->stats.collisions = 0; |
| |
| /* ignore RLEC as it reports errors for padded (<64bytes) frames |
| * with a length in the type/len field */ |
| netdev->stats.rx_errors = |
| /* adapter->stats.rnbc + */ adapter->stats.crcerrs + |
| adapter->stats.ruc + |
| adapter->stats.roc /*+ adapter->stats.rlec */ + |
| adapter->stats.icbc + |
| adapter->stats.ecbc + adapter->stats.mpc; |
| |
| /* see above |
| * netdev->stats.rx_length_errors = adapter->stats.rlec; |
| */ |
| |
| netdev->stats.rx_crc_errors = adapter->stats.crcerrs; |
| netdev->stats.rx_fifo_errors = adapter->stats.mpc; |
| netdev->stats.rx_missed_errors = adapter->stats.mpc; |
| netdev->stats.rx_over_errors = adapter->stats.mpc; |
| |
| netdev->stats.tx_errors = 0; |
| netdev->stats.rx_frame_errors = 0; |
| netdev->stats.tx_aborted_errors = 0; |
| netdev->stats.tx_carrier_errors = 0; |
| netdev->stats.tx_fifo_errors = 0; |
| netdev->stats.tx_heartbeat_errors = 0; |
| netdev->stats.tx_window_errors = 0; |
| } |
| |
| #define IXGB_MAX_INTR 10 |
| /** |
| * ixgb_intr - Interrupt Handler |
| * @irq: interrupt number |
| * @data: pointer to a network interface device structure |
| **/ |
| |
| static irqreturn_t |
| ixgb_intr(int irq, void *data) |
| { |
| struct net_device *netdev = data; |
| struct ixgb_adapter *adapter = netdev_priv(netdev); |
| struct ixgb_hw *hw = &adapter->hw; |
| u32 icr = IXGB_READ_REG(hw, ICR); |
| |
| if (unlikely(!icr)) |
| return IRQ_NONE; /* Not our interrupt */ |
| |
| if (unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC))) |
| if (!test_bit(__IXGB_DOWN, &adapter->flags)) |
| mod_timer(&adapter->watchdog_timer, jiffies); |
| |
| if (napi_schedule_prep(&adapter->napi)) { |
| |
| /* Disable interrupts and register for poll. The flush |
| of the posted write is intentionally left out. |
| */ |
| |
| IXGB_WRITE_REG(&adapter->hw, IMC, ~0); |
| __napi_schedule(&adapter->napi); |
| } |
| return IRQ_HANDLED; |
| } |
| |
| /** |
| * ixgb_clean - NAPI Rx polling callback |
| * @adapter: board private structure |
| **/ |
| |
| static int |
| ixgb_clean(struct napi_struct *napi, int budget) |
| { |
| struct ixgb_adapter *adapter = container_of(napi, struct ixgb_adapter, napi); |
| int work_done = 0; |
| |
| ixgb_clean_tx_irq(adapter); |
| ixgb_clean_rx_irq(adapter, &work_done, budget); |
| |
| /* If budget not fully consumed, exit the polling mode */ |
| if (work_done < budget) { |
| napi_complete(napi); |
| if (!test_bit(__IXGB_DOWN, &adapter->flags)) |
| ixgb_irq_enable(adapter); |
| } |
| |
| return work_done; |
| } |
| |
| /** |
| * ixgb_clean_tx_irq - Reclaim resources after transmit completes |
| * @adapter: board private structure |
| **/ |
| |
| static bool |
| ixgb_clean_tx_irq(struct ixgb_adapter *adapter) |
| { |
| struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; |
| struct net_device *netdev = adapter->netdev; |
| struct ixgb_tx_desc *tx_desc, *eop_desc; |
| struct ixgb_buffer *buffer_info; |
| unsigned int i, eop; |
| bool cleaned = false; |
| |
| i = tx_ring->next_to_clean; |
| eop = tx_ring->buffer_info[i].next_to_watch; |
| eop_desc = IXGB_TX_DESC(*tx_ring, eop); |
| |
| while (eop_desc->status & IXGB_TX_DESC_STATUS_DD) { |
| |
| rmb(); /* read buffer_info after eop_desc */ |
| for (cleaned = false; !cleaned; ) { |
| tx_desc = IXGB_TX_DESC(*tx_ring, i); |
| buffer_info = &tx_ring->buffer_info[i]; |
| |
| if (tx_desc->popts & |
| (IXGB_TX_DESC_POPTS_TXSM | |
| IXGB_TX_DESC_POPTS_IXSM)) |
| adapter->hw_csum_tx_good++; |
| |
| ixgb_unmap_and_free_tx_resource(adapter, buffer_info); |
| |
| *(u32 *)&(tx_desc->status) = 0; |
| |
| cleaned = (i == eop); |
| if (++i == tx_ring->count) i = 0; |
| } |
| |
| eop = tx_ring->buffer_info[i].next_to_watch; |
| eop_desc = IXGB_TX_DESC(*tx_ring, eop); |
| } |
| |
| tx_ring->next_to_clean = i; |
| |
| if (unlikely(cleaned && netif_carrier_ok(netdev) && |
| IXGB_DESC_UNUSED(tx_ring) >= DESC_NEEDED)) { |
| /* Make sure that anybody stopping the queue after this |
| * sees the new next_to_clean. */ |
| smp_mb(); |
| |
| if (netif_queue_stopped(netdev) && |
| !(test_bit(__IXGB_DOWN, &adapter->flags))) { |
| netif_wake_queue(netdev); |
| ++adapter->restart_queue; |
| } |
| } |
| |
| if (adapter->detect_tx_hung) { |
| /* detect a transmit hang in hardware, this serializes the |
| * check with the clearing of time_stamp and movement of i */ |
| adapter->detect_tx_hung = false; |
| if (tx_ring->buffer_info[eop].time_stamp && |
| time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + HZ) |
| && !(IXGB_READ_REG(&adapter->hw, STATUS) & |
| IXGB_STATUS_TXOFF)) { |
| /* detected Tx unit hang */ |
| netif_err(adapter, drv, adapter->netdev, |
| "Detected Tx Unit Hang\n" |
| " TDH <%x>\n" |
| " TDT <%x>\n" |
| " next_to_use <%x>\n" |
| " next_to_clean <%x>\n" |
| "buffer_info[next_to_clean]\n" |
| " time_stamp <%lx>\n" |
| " next_to_watch <%x>\n" |
| " jiffies <%lx>\n" |
| " next_to_watch.status <%x>\n", |
| IXGB_READ_REG(&adapter->hw, TDH), |
| IXGB_READ_REG(&adapter->hw, TDT), |
| tx_ring->next_to_use, |
| tx_ring->next_to_clean, |
| tx_ring->buffer_info[eop].time_stamp, |
| eop, |
| jiffies, |
| eop_desc->status); |
| netif_stop_queue(netdev); |
| } |
| } |
| |
| return cleaned; |
| } |
| |
| /** |
| * ixgb_rx_checksum - Receive Checksum Offload for 82597. |
| * @adapter: board private structure |
| * @rx_desc: receive descriptor |
| * @sk_buff: socket buffer with received data |
| **/ |
| |
| static void |
| ixgb_rx_checksum(struct ixgb_adapter *adapter, |
| struct ixgb_rx_desc *rx_desc, |
| struct sk_buff *skb) |
| { |
| /* Ignore Checksum bit is set OR |
| * TCP Checksum has not been calculated |
| */ |
| if ((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) || |
| (!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) { |
| skb_checksum_none_assert(skb); |
| return; |
| } |
| |
| /* At this point we know the hardware did the TCP checksum */ |
| /* now look at the TCP checksum error bit */ |
| if (rx_desc->errors & IXGB_RX_DESC_ERRORS_TCPE) { |
| /* let the stack verify checksum errors */ |
| skb_checksum_none_assert(skb); |
| adapter->hw_csum_rx_error++; |
| } else { |
| /* TCP checksum is good */ |
| skb->ip_summed = CHECKSUM_UNNECESSARY; |
| adapter->hw_csum_rx_good++; |
| } |
| } |
| |
| /* |
| * this should improve performance for small packets with large amounts |
| * of reassembly being done in the stack |
| */ |
| static void ixgb_check_copybreak(struct net_device *netdev, |
| struct ixgb_buffer *buffer_info, |
| u32 length, struct sk_buff **skb) |
| { |
| struct sk_buff *new_skb; |
| |
| if (length > copybreak) |
| return; |
| |
| new_skb = netdev_alloc_skb_ip_align(netdev, length); |
| if (!new_skb) |
| return; |
| |
| skb_copy_to_linear_data_offset(new_skb, -NET_IP_ALIGN, |
| (*skb)->data - NET_IP_ALIGN, |
| length + NET_IP_ALIGN); |
| /* save the skb in buffer_info as good */ |
| buffer_info->skb = *skb; |
| *skb = new_skb; |
| } |
| |
| /** |
| * ixgb_clean_rx_irq - Send received data up the network stack, |
| * @adapter: board private structure |
| **/ |
| |
| static bool |
| ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do) |
| { |
| struct ixgb_desc_ring *rx_ring = &adapter->rx_ring; |
| struct net_device *netdev = adapter->netdev; |
| struct pci_dev *pdev = adapter->pdev; |
| struct ixgb_rx_desc *rx_desc, *next_rxd; |
| struct ixgb_buffer *buffer_info, *next_buffer, *next2_buffer; |
| u32 length; |
| unsigned int i, j; |
| int cleaned_count = 0; |
| bool cleaned = false; |
| |
| i = rx_ring->next_to_clean; |
| rx_desc = IXGB_RX_DESC(*rx_ring, i); |
| buffer_info = &rx_ring->buffer_info[i]; |
| |
| while (rx_desc->status & IXGB_RX_DESC_STATUS_DD) { |
| struct sk_buff *skb; |
| u8 status; |
| |
| if (*work_done >= work_to_do) |
| break; |
| |
| (*work_done)++; |
| rmb(); /* read descriptor and rx_buffer_info after status DD */ |
| status = rx_desc->status; |
| skb = buffer_info->skb; |
| buffer_info->skb = NULL; |
| |
| prefetch(skb->data - NET_IP_ALIGN); |
| |
| if (++i == rx_ring->count) |
| i = 0; |
| next_rxd = IXGB_RX_DESC(*rx_ring, i); |
| prefetch(next_rxd); |
| |
| j = i + 1; |
| if (j == rx_ring->count) |
| j = 0; |
| next2_buffer = &rx_ring->buffer_info[j]; |
| prefetch(next2_buffer); |
| |
| next_buffer = &rx_ring->buffer_info[i]; |
| |
| cleaned = true; |
| cleaned_count++; |
| |
| dma_unmap_single(&pdev->dev, |
| buffer_info->dma, |
| buffer_info->length, |
| DMA_FROM_DEVICE); |
| buffer_info->dma = 0; |
| |
| length = le16_to_cpu(rx_desc->length); |
| rx_desc->length = 0; |
| |
| if (unlikely(!(status & IXGB_RX_DESC_STATUS_EOP))) { |
| |
| /* All receives must fit into a single buffer */ |
| |
| IXGB_DBG("Receive packet consumed multiple buffers " |
| "length<%x>\n", length); |
| |
| dev_kfree_skb_irq(skb); |
| goto rxdesc_done; |
| } |
| |
| if (unlikely(rx_desc->errors & |
| (IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE | |
| IXGB_RX_DESC_ERRORS_P | IXGB_RX_DESC_ERRORS_RXE))) { |
| dev_kfree_skb_irq(skb); |
| goto rxdesc_done; |
| } |
| |
| ixgb_check_copybreak(netdev, buffer_info, length, &skb); |
| |
| /* Good Receive */ |
| skb_put(skb, length); |
| |
| /* Receive Checksum Offload */ |
| ixgb_rx_checksum(adapter, rx_desc, skb); |
| |
| skb->protocol = eth_type_trans(skb, netdev); |
| if (status & IXGB_RX_DESC_STATUS_VP) |
| __vlan_hwaccel_put_tag(skb, |
| le16_to_cpu(rx_desc->special)); |
| |
| netif_receive_skb(skb); |
| |
| rxdesc_done: |
| /* clean up descriptor, might be written over by hw */ |
| rx_desc->status = 0; |
| |
| /* return some buffers to hardware, one at a time is too slow */ |
| if (unlikely(cleaned_count >= IXGB_RX_BUFFER_WRITE)) { |
| ixgb_alloc_rx_buffers(adapter, cleaned_count); |
| cleaned_count = 0; |
| } |
| |
| /* use prefetched values */ |
| rx_desc = next_rxd; |
| buffer_info = next_buffer; |
| } |
| |
| rx_ring->next_to_clean = i; |
| |
| cleaned_count = IXGB_DESC_UNUSED(rx_ring); |
| if (cleaned_count) |
| ixgb_alloc_rx_buffers(adapter, cleaned_count); |
| |
| return cleaned; |
| } |
| |
| /** |
| * ixgb_alloc_rx_buffers - Replace used receive buffers |
| * @adapter: address of board private structure |
| **/ |
| |
| static void |
| ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter, int cleaned_count) |
| { |
| struct ixgb_desc_ring *rx_ring = &adapter->rx_ring; |
| struct net_device *netdev = adapter->netdev; |
| struct pci_dev *pdev = adapter->pdev; |
| struct ixgb_rx_desc *rx_desc; |
| struct ixgb_buffer *buffer_info; |
| struct sk_buff *skb; |
| unsigned int i; |
| long cleancount; |
| |
| i = rx_ring->next_to_use; |
| buffer_info = &rx_ring->buffer_info[i]; |
| cleancount = IXGB_DESC_UNUSED(rx_ring); |
| |
| |
| /* leave three descriptors unused */ |
| while (--cleancount > 2 && cleaned_count--) { |
| /* recycle! its good for you */ |
| skb = buffer_info->skb; |
| if (skb) { |
| skb_trim(skb, 0); |
| goto map_skb; |
| } |
| |
| skb = netdev_alloc_skb_ip_align(netdev, adapter->rx_buffer_len); |
| if (unlikely(!skb)) { |
| /* Better luck next round */ |
| adapter->alloc_rx_buff_failed++; |
| break; |
| } |
| |
| buffer_info->skb = skb; |
| buffer_info->length = adapter->rx_buffer_len; |
| map_skb: |
| buffer_info->dma = dma_map_single(&pdev->dev, |
| skb->data, |
| adapter->rx_buffer_len, |
| DMA_FROM_DEVICE); |
| |
| rx_desc = IXGB_RX_DESC(*rx_ring, i); |
| rx_desc->buff_addr = cpu_to_le64(buffer_info->dma); |
| /* guarantee DD bit not set now before h/w gets descriptor |
| * this is the rest of the workaround for h/w double |
| * writeback. */ |
| rx_desc->status = 0; |
| |
| |
| if (++i == rx_ring->count) i = 0; |
| buffer_info = &rx_ring->buffer_info[i]; |
| } |
| |
| if (likely(rx_ring->next_to_use != i)) { |
| rx_ring->next_to_use = i; |
| if (unlikely(i-- == 0)) |
| i = (rx_ring->count - 1); |
| |
| /* Force memory writes to complete before letting h/w |
| * know there are new descriptors to fetch. (Only |
| * applicable for weak-ordered memory model archs, such |
| * as IA-64). */ |
| wmb(); |
| IXGB_WRITE_REG(&adapter->hw, RDT, i); |
| } |
| } |
| |
| static void |
| ixgb_vlan_strip_enable(struct ixgb_adapter *adapter) |
| { |
| u32 ctrl; |
| |
| /* enable VLAN tag insert/strip */ |
| ctrl = IXGB_READ_REG(&adapter->hw, CTRL0); |
| ctrl |= IXGB_CTRL0_VME; |
| IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl); |
| } |
| |
| static void |
| ixgb_vlan_strip_disable(struct ixgb_adapter *adapter) |
| { |
| u32 ctrl; |
| |
| /* disable VLAN tag insert/strip */ |
| ctrl = IXGB_READ_REG(&adapter->hw, CTRL0); |
| ctrl &= ~IXGB_CTRL0_VME; |
| IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl); |
| } |
| |
| static void |
| ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid) |
| { |
| struct ixgb_adapter *adapter = netdev_priv(netdev); |
| u32 vfta, index; |
| |
| /* add VID to filter table */ |
| |
| index = (vid >> 5) & 0x7F; |
| vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index); |
| vfta |= (1 << (vid & 0x1F)); |
| ixgb_write_vfta(&adapter->hw, index, vfta); |
| set_bit(vid, adapter->active_vlans); |
| } |
| |
| static void |
| ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid) |
| { |
| struct ixgb_adapter *adapter = netdev_priv(netdev); |
| u32 vfta, index; |
| |
| /* remove VID from filter table */ |
| |
| index = (vid >> 5) & 0x7F; |
| vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index); |
| vfta &= ~(1 << (vid & 0x1F)); |
| ixgb_write_vfta(&adapter->hw, index, vfta); |
| clear_bit(vid, adapter->active_vlans); |
| } |
| |
| static void |
| ixgb_restore_vlan(struct ixgb_adapter *adapter) |
| { |
| u16 vid; |
| |
| for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID) |
| ixgb_vlan_rx_add_vid(adapter->netdev, vid); |
| } |
| |
| #ifdef CONFIG_NET_POLL_CONTROLLER |
| /* |
| * Polling 'interrupt' - used by things like netconsole to send skbs |
| * without having to re-enable interrupts. It's not called while |
| * the interrupt routine is executing. |
| */ |
| |
| static void ixgb_netpoll(struct net_device *dev) |
| { |
| struct ixgb_adapter *adapter = netdev_priv(dev); |
| |
| disable_irq(adapter->pdev->irq); |
| ixgb_intr(adapter->pdev->irq, dev); |
| enable_irq(adapter->pdev->irq); |
| } |
| #endif |
| |
| /** |
| * ixgb_io_error_detected() - called when PCI error is detected |
| * @pdev pointer to pci device with error |
| * @state pci channel state after error |
| * |
| * This callback is called by the PCI subsystem whenever |
| * a PCI bus error is detected. |
| */ |
| static pci_ers_result_t ixgb_io_error_detected(struct pci_dev *pdev, |
| enum pci_channel_state state) |
| { |
| struct net_device *netdev = pci_get_drvdata(pdev); |
| struct ixgb_adapter *adapter = netdev_priv(netdev); |
| |
| netif_device_detach(netdev); |
| |
| if (state == pci_channel_io_perm_failure) |
| return PCI_ERS_RESULT_DISCONNECT; |
| |
| if (netif_running(netdev)) |
| ixgb_down(adapter, true); |
| |
| pci_disable_device(pdev); |
| |
| /* Request a slot reset. */ |
| return PCI_ERS_RESULT_NEED_RESET; |
| } |
| |
| /** |
| * ixgb_io_slot_reset - called after the pci bus has been reset. |
| * @pdev pointer to pci device with error |
| * |
| * This callback is called after the PCI bus has been reset. |
| * Basically, this tries to restart the card from scratch. |
| * This is a shortened version of the device probe/discovery code, |
| * it resembles the first-half of the ixgb_probe() routine. |
| */ |
| static pci_ers_result_t ixgb_io_slot_reset(struct pci_dev *pdev) |
| { |
| struct net_device *netdev = pci_get_drvdata(pdev); |
| struct ixgb_adapter *adapter = netdev_priv(netdev); |
| |
| if (pci_enable_device(pdev)) { |
| netif_err(adapter, probe, adapter->netdev, |
| "Cannot re-enable PCI device after reset\n"); |
| return PCI_ERS_RESULT_DISCONNECT; |
| } |
| |
| /* Perform card reset only on one instance of the card */ |
| if (0 != PCI_FUNC (pdev->devfn)) |
| return PCI_ERS_RESULT_RECOVERED; |
| |
| pci_set_master(pdev); |
| |
| netif_carrier_off(netdev); |
| netif_stop_queue(netdev); |
| ixgb_reset(adapter); |
| |
| /* Make sure the EEPROM is good */ |
| if (!ixgb_validate_eeprom_checksum(&adapter->hw)) { |
| netif_err(adapter, probe, adapter->netdev, |
| "After reset, the EEPROM checksum is not valid\n"); |
| return PCI_ERS_RESULT_DISCONNECT; |
| } |
| ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr); |
| memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len); |
| |
| if (!is_valid_ether_addr(netdev->perm_addr)) { |
| netif_err(adapter, probe, adapter->netdev, |
| "After reset, invalid MAC address\n"); |
| return PCI_ERS_RESULT_DISCONNECT; |
| } |
| |
| return PCI_ERS_RESULT_RECOVERED; |
| } |
| |
| /** |
| * ixgb_io_resume - called when its OK to resume normal operations |
| * @pdev pointer to pci device with error |
| * |
| * The error recovery driver tells us that its OK to resume |
| * normal operation. Implementation resembles the second-half |
| * of the ixgb_probe() routine. |
| */ |
| static void ixgb_io_resume(struct pci_dev *pdev) |
| { |
| struct net_device *netdev = pci_get_drvdata(pdev); |
| struct ixgb_adapter *adapter = netdev_priv(netdev); |
| |
| pci_set_master(pdev); |
| |
| if (netif_running(netdev)) { |
| if (ixgb_up(adapter)) { |
| pr_err("can't bring device back up after reset\n"); |
| return; |
| } |
| } |
| |
| netif_device_attach(netdev); |
| mod_timer(&adapter->watchdog_timer, jiffies); |
| } |
| |
| /* ixgb_main.c */ |