// SPDX-License-Identifier: GPL-2.0 /* Copyright(c) 1999 - 2008 Intel Corporation. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include #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 const struct pci_device_id ixgb_pci_tbl[] = { {PCI_VENDOR_ID_INTEL, IXGB_DEVICE_ID_82597EX, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {PCI_VENDOR_ID_INTEL, IXGB_DEVICE_ID_82597EX_CX4, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {PCI_VENDOR_ID_INTEL, IXGB_DEVICE_ID_82597EX_SR, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {PCI_VENDOR_ID_INTEL, 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 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(struct timer_list *t); static netdev_tx_t ixgb_xmit_frame(struct sk_buff *skb, 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 int ixgb_vlan_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid); static int ixgb_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid); static void ixgb_restore_vlan(struct ixgb_adapter *adapter); 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 const 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 = ixgb_remove, .err_handler = &ixgb_err_handler }; MODULE_AUTHOR("Intel Corporation, "); MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(DRV_VERSION); #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK) static int debug = -1; 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 == PCI_VENDOR_ID_SUN) 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 = true; 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); netif_carrier_off(netdev); 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_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 netdev_features_t ixgb_fix_features(struct net_device *netdev, netdev_features_t features) { /* * Tx VLAN insertion does not work per HW design when Rx stripping is * disabled. */ if (!(features & NETIF_F_HW_VLAN_CTAG_RX)) features &= ~NETIF_F_HW_VLAN_CTAG_TX; return features; } static int ixgb_set_features(struct net_device *netdev, netdev_features_t features) { struct ixgb_adapter *adapter = netdev_priv(netdev); netdev_features_t changed = features ^ netdev->features; if (!(changed & (NETIF_F_RXCSUM|NETIF_F_HW_VLAN_CTAG_RX))) return 0; adapter->rx_csum = !!(features & NETIF_F_RXCSUM); if (netif_running(netdev)) { ixgb_down(adapter, true); ixgb_up(adapter); ixgb_set_speed_duplex(netdev); } else ixgb_reset(adapter); return 0; } static const struct net_device_ops ixgb_netdev_ops = { .ndo_open = ixgb_open, .ndo_stop = ixgb_close, .ndo_start_xmit = ixgb_xmit_frame, .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, .ndo_fix_features = ixgb_fix_features, .ndo_set_features = ixgb_set_features, }; /** * 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 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_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); if (!err) { pci_using_dac = 1; } else { err = dma_set_mask_and_coherent(&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_MSG_ENABLE); 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->hw_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX; netdev->features = netdev->hw_features | NETIF_F_HW_VLAN_CTAG_FILTER; netdev->hw_features |= NETIF_F_RXCSUM; if (pci_using_dac) { netdev->features |= NETIF_F_HIGHDMA; netdev->vlan_features |= NETIF_F_HIGHDMA; } /* MTU range: 68 - 16114 */ netdev->min_mtu = ETH_MIN_MTU; netdev->max_mtu = IXGB_MAX_JUMBO_FRAME_SIZE - ETH_HLEN; /* 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); if (!is_valid_ether_addr(netdev->dev_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); timer_setup(&adapter->watchdog_timer, ixgb_watchdog, 0); 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 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 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) 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_zalloc_coherent(&pdev->dev, txdr->size, &txdr->dma, GFP_KERNEL); if (!txdr->desc) { vfree(txdr->buffer_info); return -ENOMEM; } 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) 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_zalloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma, GFP_KERNEL); if (!rxdr->desc) { vfree(rxdr->buffer_info); return -ENOMEM; } 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; /* 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 = kmalloc_array(ETH_ALEN, IXGB_MAX_NUM_MULTICAST_ADDRESSES, GFP_ATOMIC); u8 *addr; if (!mta) goto alloc_failed; IXGB_WRITE_REG(hw, RCTL, rctl); addr = mta; netdev_for_each_mc_addr(ha, netdev) { memcpy(addr, ha->addr, ETH_ALEN); addr += ETH_ALEN; } ixgb_mc_addr_list_update(hw, mta, netdev_mc_count(netdev), 0); kfree(mta); } alloc_failed: if (netdev->features & NETIF_F_HW_VLAN_CTAG_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(struct timer_list *t) { struct ixgb_adapter *adapter = from_timer(adapter, t, watchdog_timer); 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; if (likely(skb_is_gso(skb))) { struct ixgb_buffer *buffer_info; struct iphdr *iph; int err; err = skb_cow_head(skb, 0); if (err < 0) 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<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++) { const struct skb_frag_struct *frag; frag = &skb_shinfo(skb)->frags[f]; len = skb_frag_size(frag); offset = 0; 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 = skb_frag_dma_map(&pdev->dev, frag, 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_any(skb); return NETDEV_TX_OK; } if (skb->len <= 0) { dev_kfree_skb_any(skb); return NETDEV_TX_OK; } if (unlikely(ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, DESC_NEEDED))) return NETDEV_TX_BUSY; if (skb_vlan_tag_present(skb)) { tx_flags |= IXGB_TX_FLAGS_VLAN; vlan_id = skb_vlan_tag_get(skb); } first = adapter->tx_ring.next_to_use; tso = ixgb_tso(adapter, skb); if (tso < 0) { dev_kfree_skb_any(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_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; 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_done(napi, work_done); 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 napi_struct *napi, struct ixgb_buffer *buffer_info, u32 length, struct sk_buff **skb) { struct sk_buff *new_skb; if (length > copybreak) return; new_skb = napi_alloc_skb(napi, 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 */ pr_debug("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(&adapter->napi, 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, htons(ETH_P_8021Q), 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); if (dma_mapping_error(&pdev->dev, buffer_info->dma)) { adapter->alloc_rx_buff_failed++; break; } 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 int ixgb_vlan_rx_add_vid(struct net_device *netdev, __be16 proto, 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); return 0; } static int ixgb_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto, 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); return 0; } 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, htons(ETH_P_8021Q), vid); } /** * 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 */