diff options
Diffstat (limited to 'drivers/net/ethernet/intel/ixgb/ixgb_main.c')
| -rw-r--r-- | drivers/net/ethernet/intel/ixgb/ixgb_main.c | 2332 |
1 files changed, 2332 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/ixgb/ixgb_main.c b/drivers/net/ethernet/intel/ixgb/ixgb_main.c new file mode 100644 index 000000000000..6a130eb51cfa --- /dev/null +++ b/drivers/net/ethernet/intel/ixgb/ixgb_main.c @@ -0,0 +1,2332 @@ +/******************************************************************************* + + 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_multicast_list = 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); + |