diff options
Diffstat (limited to 'drivers/net/ixgb/ixgb_main.c')
| -rw-r--r-- | drivers/net/ixgb/ixgb_main.c | 2359 |
1 files changed, 0 insertions, 2359 deletions
diff --git a/drivers/net/ixgb/ixgb_main.c b/drivers/net/ixgb/ixgb_main.c deleted file mode 100644 index 6738b4d097f..00000000000 --- a/drivers/net/ixgb/ixgb_main.c +++ /dev/null @@ -1,2359 +0,0 @@ -/******************************************************************************* - - Intel PRO/10GbE Linux driver - Copyright(c) 1999 - 2006 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 - -*******************************************************************************/ - -#include "ixgb.h" - -char ixgb_driver_name[] = "ixgb"; -static char ixgb_driver_string[] = "Intel(R) PRO/10GbE Network Driver"; - -#ifndef CONFIG_IXGB_NAPI -#define DRIVERNAPI -#else -#define DRIVERNAPI "-NAPI" -#endif -#define DRV_VERSION "1.0.126-k4"DRIVERNAPI -const char ixgb_driver_version[] = DRV_VERSION; -static const char ixgb_copyright[] = "Copyright (c) 1999-2006 Intel Corporation."; - -/* 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 struct pci_device_id 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 */ - -int ixgb_up(struct ixgb_adapter *adapter); -void ixgb_down(struct ixgb_adapter *adapter, boolean_t kill_watchdog); -void ixgb_reset(struct ixgb_adapter *adapter); -int ixgb_setup_tx_resources(struct ixgb_adapter *adapter); -int ixgb_setup_rx_resources(struct ixgb_adapter *adapter); -void ixgb_free_tx_resources(struct ixgb_adapter *adapter); -void ixgb_free_rx_resources(struct ixgb_adapter *adapter); -void ixgb_update_stats(struct ixgb_adapter *adapter); - -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 int 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 boolean_t ixgb_clean_tx_irq(struct ixgb_adapter *adapter); - -#ifdef CONFIG_IXGB_NAPI -static int ixgb_clean(struct napi_struct *napi, int budget); -static boolean_t ixgb_clean_rx_irq(struct ixgb_adapter *adapter, - int *work_done, int work_to_do); -#else -static boolean_t ixgb_clean_rx_irq(struct ixgb_adapter *adapter); -#endif -static void ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter); -static void ixgb_tx_timeout(struct net_device *dev); -static void ixgb_tx_timeout_task(struct work_struct *work); -static void ixgb_vlan_rx_register(struct net_device *netdev, - struct vlan_group *grp); -static void ixgb_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid); -static void ixgb_vlan_rx_kill_vid(struct net_device *netdev, uint16_t 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)"); - -/* some defines for controlling descriptor fetches in h/w */ -#define RXDCTL_WTHRESH_DEFAULT 15 /* chip writes back at this many or RXT0 */ -#define RXDCTL_PTHRESH_DEFAULT 0 /* chip considers prefech below - * this */ -#define RXDCTL_HTHRESH_DEFAULT 0 /* chip will only prefetch if tail - * is pushed this many descriptors - * from head */ - -/** - * 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) -{ - printk(KERN_INFO "%s - version %s\n", - ixgb_driver_string, ixgb_driver_version); - - printk(KERN_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) -{ - atomic_inc(&adapter->irq_sem); - 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) -{ - if(atomic_dec_and_test(&adapter->irq_sem)) { - 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); - - /* 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); - DPRINTK(PROBE, ERR, - "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) { - uint32_t ctrl0 = IXGB_READ_REG(hw, CTRL0); - - if(!(ctrl0 & IXGB_CTRL0_JFE)) { - ctrl0 |= IXGB_CTRL0_JFE; - IXGB_WRITE_REG(hw, CTRL0, ctrl0); - } - } - } - - mod_timer(&adapter->watchdog_timer, jiffies); - -#ifdef CONFIG_IXGB_NAPI - napi_enable(&adapter->napi); -#endif - ixgb_irq_enable(adapter); - - return 0; -} - -void -ixgb_down(struct ixgb_adapter *adapter, boolean_t kill_watchdog) -{ - struct net_device *netdev = adapter->netdev; - -#ifdef CONFIG_IXGB_NAPI - napi_disable(&adapter->napi); - atomic_set(&adapter->irq_sem, 0); -#endif - - 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)) - DPRINTK(PROBE, ERR, "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); - } - } -} - -/** - * 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; - unsigned long mmio_start; - int mmio_len; - int pci_using_dac; - int i; - int err; - - if((err = pci_enable_device(pdev))) - return err; - - if(!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK)) && - !(err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))) { - pci_using_dac = 1; - } else { - if((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) || - (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))) { - printk(KERN_ERR - "ixgb: No usable DMA configuration, aborting\n"); - goto err_dma_mask; - } - pci_using_dac = 0; - } - - if((err = pci_request_regions(pdev, ixgb_driver_name))) - 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); - - mmio_start = pci_resource_start(pdev, BAR_0); - mmio_len = pci_resource_len(pdev, BAR_0); - - adapter->hw.hw_addr = ioremap(mmio_start, mmio_len); - 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->open = &ixgb_open; - netdev->stop = &ixgb_close; - netdev->hard_start_xmit = &ixgb_xmit_frame; - netdev->get_stats = &ixgb_get_stats; - netdev->set_multicast_list = &ixgb_set_multi; - netdev->set_mac_address = &ixgb_set_mac; - netdev->change_mtu = &ixgb_change_mtu; - ixgb_set_ethtool_ops(netdev); - netdev->tx_timeout = &ixgb_tx_timeout; - netdev->watchdog_timeo = 5 * HZ; -#ifdef CONFIG_IXGB_NAPI - netif_napi_add(netdev, &adapter->napi, ixgb_clean, 64); -#endif - netdev->vlan_rx_register = ixgb_vlan_rx_register; - netdev->vlan_rx_add_vid = ixgb_vlan_rx_add_vid; - netdev->vlan_rx_kill_vid = ixgb_vlan_rx_kill_vid; -#ifdef CONFIG_NET_POLL_CONTROLLER - netdev->poll_controller = ixgb_netpoll; -#endif - - strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1); - netdev->mem_start = mmio_start; - netdev->mem_end = mmio_start + mmio_len; - netdev->base_addr = adapter->hw.io_base; - - adapter->bd_number = cards_found; - adapter->link_speed = 0; - adapter->link_duplex = 0; - - /* setup the private structure */ - - if((err = ixgb_sw_init(adapter))) - 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; -#ifdef NETIF_F_LLTX - netdev->features |= NETIF_F_LLTX; -#endif - - if(pci_using_dac) - netdev->features |= NETIF_F_HIGHDMA; - - /* make sure the EEPROM is good */ - - if(!ixgb_validate_eeprom_checksum(&adapter->hw)) { - DPRINTK(PROBE, ERR, "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)) { - DPRINTK(PROBE, ERR, "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"); - if((err = register_netdev(netdev))) - goto err_register; - - /* we're going to reset, so assume we have no link for now */ - - netif_carrier_off(netdev); - netif_stop_queue(netdev); - - DPRINTK(PROBE, INFO, "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); - - unregister_netdev(netdev); - - iounmap(adapter->hw.hw_addr); - pci_release_regions(pdev); - - free_netdev(netdev); -} - -/** - * 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; - - 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 */ - DPRINTK(PROBE, ERR, "unsupported device id\n"); - } - - /* enable flow control to be programmed */ - hw->fc.send_xon = 1; - - atomic_set(&adapter->irq_sem, 1); - spin_lock_init(&adapter->tx_lock); - - 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 */ - - if((err = ixgb_setup_tx_resources(adapter))) - goto err_setup_tx; - - /* allocate receive descriptors */ - - if((err = ixgb_setup_rx_resources(adapter))) - goto err_setup_rx; - - if((err = ixgb_up(adapter))) - goto err_up; - - 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 = vmalloc(size); - if(!txdr->buffer_info) { - DPRINTK(PROBE, ERR, - "Unable to allocate transmit descriptor ring memory\n"); - return -ENOMEM; - } - memset(txdr->buffer_info, 0, size); - - /* round up to nearest 4K */ - - txdr->size = txdr->count * sizeof(struct ixgb_tx_desc); - txdr->size = ALIGN(txdr->size, 4096); - - txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma); - if(!txdr->desc) { - vfree(txdr->buffer_info); - DPRINTK(PROBE, ERR, - "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) -{ - uint64_t tdba = adapter->tx_ring.dma; - uint32_t tdlen = adapter->tx_ring.count * sizeof(struct ixgb_tx_desc); - uint32_t 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 = vmalloc(size); - if(!rxdr->buffer_info) { - DPRINTK(PROBE, ERR, - "Unable to allocate receive descriptor ring\n"); - return -ENOMEM; - } - memset(rxdr->buffer_info, 0, size); - - /* Round up to nearest 4K */ - - rxdr->size = rxdr->count * sizeof(struct ixgb_rx_desc); - rxdr->size = ALIGN(rxdr->size, 4096); - - rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma); - - if(!rxdr->desc) { - vfree(rxdr->buffer_info); - DPRINTK(PROBE, ERR, - "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) -{ - uint32_t 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) -{ - uint64_t rdba = adapter->rx_ring.dma; - uint32_t rdlen = adapter->rx_ring.count * sizeof(struct ixgb_rx_desc); - struct ixgb_hw *hw = &adapter->hw; - uint32_t rctl; - uint32_t rxcsum; - uint32_t rxdctl; - - /* 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); - - /* set up pre-fetching of receive buffers so we get some before we - * run out (default hardware behavior is to run out before fetching - * more). This sets up to fetch if HTHRESH rx descriptors are avail - * and the descriptors in hw cache are below PTHRESH. This avoids - * the hardware behavior of fetching <=512 descriptors in a single - * burst that pre-empts all other activity, usually causing fifo - * overflows. */ - /* use WTHRESH to burst write 16 descriptors or burst when RXT0 */ - rxdctl = RXDCTL_WTHRESH_DEFAULT << IXGB_RXDCTL_WTHRESH_SHIFT | - RXDCTL_HTHRESH_DEFAULT << IXGB_RXDCTL_HTHRESH_SHIFT | - RXDCTL_PTHRESH_DEFAULT << IXGB_RXDCTL_PTHRESH_SHIFT; - IXGB_WRITE_REG(hw, RXDCTL, rxdctl); - - /* Enable Receive Checksum Offload for TCP and UDP */ - if(adapter->rx_csum == TRUE) { - 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; - - pci_free_consistent(pdev, 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) -{ - struct pci_dev *pdev = adapter->pdev; - - if (buffer_info->dma) - pci_unmap_page(pdev, buffer_info->dma, buffer_info->length, - PCI_DMA_TODEVICE); - - if (buffer_info->skb) - dev_kfree_skb_any(buffer_info->skb); - - buffer_info->skb = NULL; - buffer_info->dma = 0; - 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; - - pci_free_consistent(pdev, 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->skb) { - - pci_unmap_single(pdev, - buffer_info->dma, - buffer_info->length, - PCI_DMA_FROMDEVICE); - - 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 dev_mc_list *mc_ptr; - uint32_t 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); - } else if(netdev->flags & IFF_ALLMULTI) { - rctl |= IXGB_RCTL_MPE; - rctl &= ~IXGB_RCTL_UPE; - } else { - rctl &= ~(IXGB_RCTL_UPE | IXGB_RCTL_MPE); - } - - if(netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES) { - rctl |= IXGB_RCTL_MPE; - IXGB_WRITE_REG(hw, RCTL, rctl); - } else { - uint8_t mta[IXGB_MAX_NUM_MULTICAST_ADDRESSES * - IXGB_ETH_LENGTH_OF_ADDRESS]; - - IXGB_WRITE_REG(hw, RCTL, rctl); - - for(i = 0, mc_ptr = netdev->mc_list; mc_ptr; - i++, mc_ptr = mc_ptr->next) - memcpy(&mta[i * IXGB_ETH_LENGTH_OF_ADDRESS], - mc_ptr->dmi_addr, IXGB_ETH_LENGTH_OF_ADDRESS); - - ixgb_mc_addr_list_update(hw, mta, netdev->mc_count, 0); - } -} - -/** - * 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)) { - DPRINTK(LINK, INFO, - "NIC Link is Up 10000 Mbps Full Duplex\n"); - adapter->link_speed = 10000; - adapter->link_duplex = FULL_DUPLEX; - netif_carrier_on(netdev); - netif_wake_queue(netdev); - } - } else { - if(netif_carrier_ok(netdev)) { - adapter->link_speed = 0; - adapter->link_duplex = 0; - DPRINTK(LINK, INFO, "NIC Link is Down\n"); - netif_carrier_off(netdev); - netif_stop_queue(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); - } - } - - /* 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; - uint8_t ipcss, ipcso, tucss, tucso, hdr_len; - uint16_t 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 boolean_t -ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb) -{ - struct ixgb_context_desc *context_desc; - unsigned int i; - uint8_t css, cso; - - if(likely(skb->ip_summed == CHECKSUM_PARTIAL)) { - struct ixgb_buffer *buffer_info; - css = skb_transport_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 */ - *(uint32_t *)&(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 ixgb_buffer *buffer_info; - int len = skb->len; - 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; - - len -= skb->data_len; - - 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->dma = - pci_map_single(adapter->pdev, - skb->data + offset, - size, - PCI_DMA_TODEVICE); - buffer_info->time_stamp = jiffies; - buffer_info->next_to_watch = 0; - - len -= size; - offset += size; - count++; - 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 = 0; - - 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 && (f == (nr_frags - 1)) - && size == len && size > 8)) - size -= 4; - - buffer_info->length = size; - buffer_info->dma = - pci_map_page(adapter->pdev, - frag->page, - frag->page_offset + offset, - size, - PCI_DMA_TODEVICE); - buffer_info->time_stamp = jiffies; - buffer_info->next_to_watch = 0; - - len -= size; - offset += size; - count++; - if(++i == tx_ring->count) i = 0; - } - } - i = (i == 0) ? tx_ring->count - 1 : i - 1; - tx_ring->buffer_info[i].skb = skb; - tx_ring->buffer_info[first].next_to_watch = i; - - return count; -} - -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; - uint32_t cmd_type_len = adapter->tx_cmd_type; - uint8_t status = 0; - uint8_t 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 int -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; - unsigned long flags; - int vlan_id = 0; - int tso; - - if(skb->len <= 0) { - dev_kfree_skb_any(skb); - return 0; - } - -#ifdef NETIF_F_LLTX - local_irq_save(flags); - if (!spin_trylock(&adapter->tx_lock)) { - /* Collision - tell upper layer to requeue */ - local_irq_restore(flags); - return NETDEV_TX_LOCKED; - } -#else - spin_lock_irqsave(&adapter->tx_lock, flags); -#endif - - if (unlikely(ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, - DESC_NEEDED))) { - netif_stop_queue(netdev); - spin_unlock_irqrestore(&adapter->tx_lock, flags); - return NETDEV_TX_BUSY; - } - -#ifndef NETIF_F_LLTX - spin_unlock_irqrestore(&adapter->tx_lock, flags); -#endif - - if(adapter->vlgrp && 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_any(skb); -#ifdef NETIF_F_LLTX - spin_unlock_irqrestore(&adapter->tx_lock, flags); -#endif - 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; - - ixgb_tx_queue(adapter, ixgb_tx_map(adapter, skb, first), vlan_id, - tx_flags); - - netdev->trans_start = jiffies; - -#ifdef NETIF_F_LLTX - /* Make sure there is space in the ring for the next send. */ - ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, DESC_NEEDED); - - spin_unlock_irqrestore(&adapter->tx_lock, flags); - -#endif - 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) -{ - struct ixgb_adapter *adapter = netdev_priv(netdev); - - return &adapter->net_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; - - - if((max_frame < IXGB_MIN_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) - || (max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) { - DPRINTK(PROBE, ERR, "Invalid MTU setting %d\n", new_mtu); - return -EINVAL; - } - - adapter->rx_buffer_len = max_frame; - - netdev->mtu = new_mtu; - - if ((old_max_frame != max_frame) && netif_running(netdev)) { - ixgb_down(adapter, TRUE); - 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 > 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 */ - - adapter->net_stats.rx_packets = adapter->stats.gprcl; - adapter->net_stats.tx_packets = adapter->stats.gptcl; - adapter->net_stats.rx_bytes = adapter->stats.gorcl; - adapter->net_stats.tx_bytes = adapter->stats.gotcl; - adapter->net_stats.multicast = adapter->stats.mprcl; - adapter->net_stats.collisions = 0; - - /* ignore RLEC as it reports errors for padded (<64bytes) frames - * with a length in the type/len field */ - adapter->net_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 - * adapter->net_stats.rx_length_errors = adapter->stats.rlec; - */ - - adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs; - adapter->net_stats.rx_fifo_errors = adapter->stats.mpc; - adapter->net_stats.rx_missed_errors = adapter->stats.mpc; - adapter->net_stats.rx_over_errors = adapter->stats.mpc; - - adapter->net_stats.tx_errors = 0; - adapter->net_stats.rx_frame_errors = 0; - adapter->net_stats.tx_aborted_errors = 0; - adapter->net_stats.tx_carrier_errors = 0; - adapter->net_stats.tx_fifo_errors = 0; - adapter->net_stats.tx_heartbeat_errors = 0; - adapter->net_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; - uint32_t icr = IXGB_READ_REG(hw, ICR); -#ifndef CONFIG_IXGB_NAPI - unsigned int i; -#endif - - if(unlikely(!icr)) - return IRQ_NONE; /* Not our interrupt */ - - if(unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC))) { - mod_timer(&adapter->watchdog_timer, jiffies); - } - -#ifdef CONFIG_IXGB_NAPI - if (netif_rx_schedule_prep(netdev, &adapter->napi)) { - - /* Disable interrupts and register for poll. The flush - of the posted write is intentionally left out. - */ - - atomic_inc(&adapter->irq_sem); - IXGB_WRITE_REG(&adapter->hw, IMC, ~0); - __netif_rx_schedule(netdev, &adapter->napi); - } -#else - /* yes, that is actually a & and it is meant to make sure that - * every pass through this for loop checks both receive and - * transmit queues for completed descriptors, intended to - * avoid starvation issues and assist tx/rx fairness. */ - for(i = 0; i < IXGB_MAX_INTR; i++) - if(!ixgb_clean_rx_irq(adapter) & - !ixgb_clean_tx_irq(adapter)) - break; -#endif - return IRQ_HANDLED; -} - -#ifdef CONFIG_IXGB_NAPI -/** - * 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); - struct net_device *netdev = adapter->netdev; - 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) { - netif_rx_complete(netdev, napi); - ixgb_irq_enable(adapter); - } - - return work_done; -} -#endif - -/** - * ixgb_clean_tx_irq - Reclaim resources after transmit completes - * @adapter: board private structure - **/ - -static boolean_t -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; - boolean_t 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) { - - 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); - - *(uint32_t *)&(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(netif_queue_stopped(netdev))) { - spin_lock(&adapter->tx_lock); - if (netif_queue_stopped(netdev) && netif_carrier_ok(netdev) && - (IXGB_DESC_UNUSED(tx_ring) >= DESC_NEEDED)) - netif_wake_queue(netdev); - spin_unlock(&adapter->tx_lock); - } - - 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].dma && - time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + HZ) - && !(IXGB_READ_REG(&adapter->hw, STATUS) & - IXGB_STATUS_TXOFF)) { - /* detected Tx unit hang */ - DPRINTK(DRV, ERR, "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->ip_summed = CHECKSUM_NONE; - 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->ip_summed = CHECKSUM_NONE; - adapter->hw_csum_rx_error++; - } else { - /* TCP checksum is good */ - skb->ip_summed = CHECKSUM_UNNECESSARY; - adapter->hw_csum_rx_good++; - } -} - -/** - * ixgb_clean_rx_irq - Send received data up the network stack, - * @adapter: board private structure - **/ - -static boolean_t -#ifdef CONFIG_IXGB_NAPI -ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do) -#else -ixgb_clean_rx_irq(struct ixgb_adapter *adapter) -#endif -{ - 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; - uint32_t length; - unsigned int i, j; - boolean_t 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, *next_skb; - u8 status; - -#ifdef CONFIG_IXGB_NAPI - if(*work_done >= work_to_do) - break; - - (*work_done)++; -#endif - status = rx_desc->status; - skb = buffer_info->skb; - buffer_info->skb = NULL; - - prefetch(skb->data); - - if(++i == rx_ring->count) i = 0; - next_rxd = IXGB_RX_DESC(*rx_ring, i); - prefetch(next_rxd); - - if((j = i + 1) == rx_ring->count) j = 0; - next2_buffer = &rx_ring->buffer_info[j]; - prefetch(next2_buffer); - - next_buffer = &rx_ring->buffer_info[i]; - next_skb = next_buffer->skb; - prefetch(next_skb); - - cleaned = TRUE; - - pci_unmap_single(pdev, - buffer_info->dma, - buffer_info->length, - PCI_DMA_FROMDEVICE); - - length = le16_to_cpu(rx_desc->length); - - 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; - } - - /* code added for copybreak, this should improve - * performance for small packets with large amounts - * of reassembly being done in the stack */ -#define IXGB_CB_LENGTH 256 - if (length < IXGB_CB_LENGTH) { - struct sk_buff *new_skb = - netdev_alloc_skb(netdev, length + NET_IP_ALIGN); - if (new_skb) { - skb_reserve(new_skb, NET_IP_ALIGN); - 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; - } - } - /* end copybreak code */ - - /* Good Receive */ - skb_put(skb, length); - - /* Receive Checksum Offload */ - ixgb_rx_checksum(adapter, rx_desc, skb); - - skb->protocol = eth_type_trans(skb, netdev); -#ifdef CONFIG_IXGB_NAPI - if(adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) { - vlan_hwaccel_receive_skb(skb, adapter->vlgrp, - le16_to_cpu(rx_desc->special) & - IXGB_RX_DESC_SPECIAL_VLAN_MASK); - } else { - netif_receive_skb(skb); - } -#else /* CONFIG_IXGB_NAPI */ - if(adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) { - vlan_hwaccel_rx(skb, adapter->vlgrp, - le16_to_cpu(rx_desc->special) & - IXGB_RX_DESC_SPECIAL_VLAN_MASK); - } else { - netif_rx(skb); - } -#endif /* CONFIG_IXGB_NAPI */ - netdev->last_rx = jiffies; - -rxdesc_done: - /* clean up descriptor, might be written over by hw */ - rx_desc->status = 0; - - /* use prefetched values */ - rx_desc = next_rxd; - buffer_info = next_buffer; - } - - rx_ring->next_to_clean = i; - - ixgb_alloc_rx_buffers(adapter); - - 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) -{ - 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) { - /* recycle! its good for you */ - skb = buffer_info->skb; - if (skb) { - skb_trim(skb, 0); - goto map_skb; - } - - skb = netdev_alloc_skb(netdev, adapter->rx_buffer_len - + NET_IP_ALIGN); - if (unlikely(!skb)) { - /* Better luck next round */ - adapter->alloc_rx_buff_failed++; - break; - } - - /* Make buffer alignment 2 beyond a 16 byte boundary - * this will result in a 16 byte aligned IP header after - * the 14 byte MAC header is removed - */ - skb_reserve(skb, NET_IP_ALIGN); - - buffer_info->skb = skb; - buffer_info->length = adapter->rx_buffer_len; -map_skb: - buffer_info->dma = pci_map_single(pdev, - skb->data, - adapter->rx_buffer_len, - PCI_DMA_FROMDEVICE); - - 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); - } -} - -/** - * ixgb_vlan_rx_register - enables or disables vlan tagging/stripping. - * - * @param netdev network interface device structure - * @param grp indicates to enable or disable tagging/stripping - **/ -static void -ixgb_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp) -{ - struct ixgb_adapter *adapter = netdev_priv(netdev); - uint32_t ctrl, rctl; - - ixgb_irq_disable(adapter); - adapter->vlgrp = grp; - - if(grp) { - /* enable VLAN tag insert/strip */ - ctrl = IXGB_READ_REG(&adapter->hw, CTRL0); - ctrl |= IXGB_CTRL0_VME; - IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl); - - /* enable VLAN receive filtering */ - - rctl = IXGB_READ_REG(&adapter->hw, RCTL); - rctl |= IXGB_RCTL_VFE; - rctl &= ~IXGB_RCTL_CFIEN; - IXGB_WRITE_REG(&adapter->hw, RCTL, rctl); - } else { - /* disable VLAN tag insert/strip */ - - ctrl = IXGB_READ_REG(&adapter->hw, CTRL0); - ctrl &= ~IXGB_CTRL0_VME; - IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl); - - /* disable VLAN filtering */ - - rctl = IXGB_READ_REG(&adapter->hw, RCTL); - rctl &= ~IXGB_RCTL_VFE; - IXGB_WRITE_REG(&adapter->hw, RCTL, rctl); - } - - ixgb_irq_enable(adapter); -} - -static void -ixgb_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid) -{ - struct ixgb_adapter *adapter = netdev_priv(netdev); - uint32_t 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); -} - -static void -ixgb_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid) -{ - struct ixgb_adapter *adapter = netdev_priv(netdev); - uint32_t vfta, index; - - ixgb_irq_disable(adapter); - - vlan_group_set_device(adapter->vlgrp, vid, NULL); - - ixgb_irq_enable(adapter); - - /* 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); -} - -static void -ixgb_restore_vlan(struct ixgb_adapter *adapter) -{ - ixgb_vlan_rx_register(adapter->netdev, adapter->vlgrp); - - if(adapter->vlgrp) { - uint16_t vid; - for(vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) { - if(!vlan_group_get_device(adapter->vlgrp, vid)) - continue; - 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); - - 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 buss 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)) { - DPRINTK(PROBE, ERR, "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)) { - DPRINTK(PROBE, ERR, "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)) { - DPRINTK(PROBE, ERR, "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)) { - printk ("ixgb: can't bring device back up after reset\n"); - return; - } - } - - netif_device_attach(netdev); - mod_timer(&adapter->watchdog_timer, jiffies); -} - -/* ixgb_main.c */ |