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authorJeff Kirsher <jeffrey.t.kirsher@intel.com>2011-04-07 18:42:33 +0400
committerJeff Kirsher <jeffrey.t.kirsher@intel.com>2011-08-11 07:03:27 +0400
commitdee1ad47f2ee75f5146d83ca757c1b7861c34c3b (patch)
tree47cbdefe3d0f9b729724e378ad6a96eaddfd5fbc /drivers/net/ixgb/ixgb_main.c
parentf7917c009c28c941ba151ee66f04dc7f6a2e1e0b (diff)
downloadlinux-dee1ad47f2ee75f5146d83ca757c1b7861c34c3b.tar.xz
intel: Move the Intel wired LAN drivers
Moves the Intel wired LAN drivers into drivers/net/ethernet/intel/ and the necessary Kconfig and Makefile changes. Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ixgb/ixgb_main.c')
-rw-r--r--drivers/net/ixgb/ixgb_main.c2332
1 files changed, 0 insertions, 2332 deletions
diff --git a/drivers/net/ixgb/ixgb_main.c b/drivers/net/ixgb/ixgb_main.c
deleted file mode 100644
index 6a130eb51cfa..000000000000
--- a/drivers/net/ixgb/ixgb_main.c
+++ /dev/null
@@ -1,2332 +0,0 @@
-/*******************************************************************************
-
- 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);
-
- if (!netif_carrier_ok(netdev)) {
- if (IXGB_DESC_UNUSED(txdr) + 1 < txdr->count) {
- /* We've lost link, so the controller stops DMA,
- * but we've got queued Tx work that's never going
- * to get done, so reset controller to flush Tx.
- * (Do the reset outside of interrupt context). */
- schedule_work(&adapter->tx_timeout_task);
- /* return immediately since reset is imminent */
- return;
- }
- }
-
- /* Force detection of hung controller every watchdog period */
- adapter->detect_tx_hung = true;
-
- /* generate an interrupt to force clean up of any stragglers */
- IXGB_WRITE_REG(&adapter->hw, ICS, IXGB_INT_TXDW);
-
- /* Reset the timer */
- mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
-}
-
-#define IXGB_TX_FLAGS_CSUM 0x00000001
-#define IXGB_TX_FLAGS_VLAN 0x00000002
-#define IXGB_TX_FLAGS_TSO 0x00000004
-
-static int
-ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb)
-{
- struct ixgb_context_desc *context_desc;
- unsigned int i;
- u8 ipcss, ipcso, tucss, tucso, hdr_len;
- u16 ipcse, tucse, mss;
- int err;
-
- if (likely(skb_is_gso(skb))) {
- struct ixgb_buffer *buffer_info;
- struct iphdr *iph;
-
- if (skb_header_cloned(skb)) {
- err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
- if (err)
- return err;
- }
-
- hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
- mss = skb_shinfo(skb)->gso_size;
- iph = ip_hdr(skb);
- iph->tot_len = 0;
- iph->check = 0;
- tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
- iph->daddr, 0,
- IPPROTO_TCP, 0);
- ipcss = skb_network_offset(skb);
- ipcso = (void *)&(iph->check) - (void *)skb->data;
- ipcse = skb_transport_offset(skb) - 1;
- tucss = skb_transport_offset(skb);
- tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
- tucse = 0;
-
- i = adapter->tx_ring.next_to_use;
- context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
- buffer_info = &adapter->tx_ring.buffer_info[i];
- WARN_ON(buffer_info->dma != 0);
-
- context_desc->ipcss = ipcss;
- context_desc->ipcso = ipcso;
- context_desc->ipcse = cpu_to_le16(ipcse);
- context_desc->tucss = tucss;
- context_desc->tucso = tucso;
- context_desc->tucse = cpu_to_le16(tucse);
- context_desc->mss = cpu_to_le16(mss);
- context_desc->hdr_len = hdr_len;
- context_desc->status = 0;
- context_desc->cmd_type_len = cpu_to_le32(
- IXGB_CONTEXT_DESC_TYPE
- | IXGB_CONTEXT_DESC_CMD_TSE
- | IXGB_CONTEXT_DESC_CMD_IP
- | IXGB_CONTEXT_DESC_CMD_TCP
- | IXGB_CONTEXT_DESC_CMD_IDE
- | (skb->len - (hdr_len)));
-
-
- if (++i == adapter->tx_ring.count) i = 0;
- adapter->tx_ring.next_to_use = i;
-
- return 1;
- }
-
- return 0;
-}
-
-static bool
-ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb)
-{
- struct ixgb_context_desc *context_desc;
- unsigned int i;
- u8 css, cso;
-
- if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
- struct ixgb_buffer *buffer_info;
- css = skb_checksum_start_offset(skb);
- cso = css + skb->csum_offset;
-
- i = adapter->tx_ring.next_to_use;
- context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
- buffer_info = &adapter->tx_ring.buffer_info[i];
- WARN_ON(buffer_info->dma != 0);
-
- context_desc->tucss = css;
- context_desc->tucso = cso;
- context_desc->tucse = 0;
- /* zero out any previously existing data in one instruction */
- *(u32 *)&(context_desc->ipcss) = 0;
- context_desc->status = 0;
- context_desc->hdr_len = 0;
- context_desc->mss = 0;
- context_desc->cmd_type_len =
- cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
- | IXGB_TX_DESC_CMD_IDE);
-
- if (++i == adapter->tx_ring.count) i = 0;
- adapter->tx_ring.next_to_use = i;
-
- return true;
- }
-
- return false;
-}
-
-#define IXGB_MAX_TXD_PWR 14
-#define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR)
-
-static int
-ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
- unsigned int first)
-{
- struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
- struct pci_dev *pdev = adapter->pdev;
- struct ixgb_buffer *buffer_info;
- int len = skb_headlen(skb);
- unsigned int offset = 0, size, count = 0, i;
- unsigned int mss = skb_shinfo(skb)->gso_size;
- unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
- unsigned int f;
-
- i = tx_ring->next_to_use;
-
- while (len) {
- buffer_info = &tx_ring->buffer_info[i];
- size = min(len, IXGB_MAX_DATA_PER_TXD);
- /* Workaround for premature desc write-backs
- * in TSO mode. Append 4-byte sentinel desc */
- if (unlikely(mss && !nr_frags && size == len && size > 8))
- size -= 4;
-
- buffer_info->length = size;
- WARN_ON(buffer_info->dma != 0);
- buffer_info->time_stamp = jiffies;
- buffer_info->mapped_as_page = false;
- buffer_info->dma = dma_map_single(&pdev->dev,
- skb->data + offset,
- size, DMA_TO_DEVICE);
- if (dma_mapping_error(&pdev->dev, buffer_info->dma))
- goto dma_error;
- buffer_info->next_to_watch = 0;
-
- len -= size;
- offset += size;
- count++;
- if (len) {
- i++;
- if (i == tx_ring->count)
- i = 0;
- }
- }
-
- for (f = 0; f < nr_frags; f++) {
- struct skb_frag_struct *frag;
-
- frag = &skb_shinfo(skb)->frags[f];
- len = frag->size;
- offset = frag->page_offset;
-
- while (len) {
- i++;
- if (i == tx_ring->count)
- i = 0;
-
- buffer_info = &tx_ring->buffer_info[i];
- size = min(len, IXGB_MAX_DATA_PER_TXD);
-
- /* Workaround for premature desc write-backs
- * in TSO mode. Append 4-byte sentinel desc */
- if (unlikely(mss && (f == (nr_frags - 1))
- && size == len && size > 8))
- size -= 4;
-
- buffer_info->length = size;
- buffer_info->time_stamp = jiffies;
- buffer_info->mapped_as_page = true;
- buffer_info->dma =
- dma_map_page(&pdev->dev, frag->page,
- offset, size, DMA_TO_DEVICE);
- if (dma_mapping_error(&pdev->dev, buffer_info->dma))
- goto dma_error;
- buffer_info->next_to_watch = 0;
-
- len -= size;
- offset += size;
- count++;
- }
- }
- tx_ring->buffer_info[i].skb = skb;
- tx_ring->buffer_info[first].next_to_watch = i;
-
- return count;
-
-dma_error:
- dev_err(&pdev->dev, "TX DMA map failed\n");
- buffer_info->dma = 0;
- if (count)
- count--;
-
- while (count--) {
- if (i==0)
- i += tx_ring->count;
- i--;
- buffer_info = &tx_ring->buffer_info[i];
- ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
- }
-
- return 0;
-}
-
-static void
-ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,int tx_flags)
-{
- struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
- struct ixgb_tx_desc *tx_desc = NULL;
- struct ixgb_buffer *buffer_info;
- u32 cmd_type_len = adapter->tx_cmd_type;
- u8 status = 0;
- u8 popts = 0;
- unsigned int i;
-
- if (tx_flags & IXGB_TX_FLAGS_TSO) {
- cmd_type_len |= IXGB_TX_DESC_CMD_TSE;
- popts |= (IXGB_TX_DESC_POPTS_IXSM | IXGB_TX_DESC_POPTS_TXSM);
- }
-
- if (tx_flags & IXGB_TX_FLAGS_CSUM)
- popts |= IXGB_TX_DESC_POPTS_TXSM;
-
- if (tx_flags & IXGB_TX_FLAGS_VLAN)
- cmd_type_len |= IXGB_TX_DESC_CMD_VLE;
-
- i = tx_ring->next_to_use;
-
- while (count--) {
- buffer_info = &tx_ring->buffer_info[i];
- tx_desc = IXGB_TX_DESC(*tx_ring, i);
- tx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
- tx_desc->cmd_type_len =
- cpu_to_le32(cmd_type_len | buffer_info->length);
- tx_desc->status = status;
- tx_desc->popts = popts;
- tx_desc->vlan = cpu_to_le16(vlan_id);
-
- if (++i == tx_ring->count) i = 0;
- }
-
- tx_desc->cmd_type_len |=
- cpu_to_le32(IXGB_TX_DESC_CMD_EOP | IXGB_TX_DESC_CMD_RS);
-
- /* Force memory writes to complete before letting h/w
- * know there are new descriptors to fetch. (Only
- * applicable for weak-ordered memory model archs,
- * such as IA-64). */
- wmb();
-
- tx_ring->next_to_use = i;
- IXGB_WRITE_REG(&adapter->hw, TDT, i);
-}
-
-static int __ixgb_maybe_stop_tx(struct net_device *netdev, int size)
-{
- struct ixgb_adapter *adapter = netdev_priv(netdev);
- struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
-
- netif_stop_queue(netdev);
- /* Herbert's original patch had:
- * smp_mb__after_netif_stop_queue();
- * but since that doesn't exist yet, just open code it. */
- smp_mb();
-
- /* We need to check again in a case another CPU has just
- * made room available. */
- if (likely(IXGB_DESC_UNUSED(tx_ring) < size))
- return -EBUSY;
-
- /* A reprieve! */
- netif_start_queue(netdev);
- ++adapter->restart_queue;
- return 0;
-}
-
-static int ixgb_maybe_stop_tx(struct net_device *netdev,
- struct ixgb_desc_ring *tx_ring, int size)
-{
- if (likely(IXGB_DESC_UNUSED(tx_ring) >= size))
- return 0;
- return __ixgb_maybe_stop_tx(netdev, size);
-}
-
-
-/* Tx Descriptors needed, worst case */
-#define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
- (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
-#define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) /* skb->date */ + \
- MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 /* for context */ \
- + 1 /* one more needed for sentinel TSO workaround */
-
-static netdev_tx_t
-ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
-{
- struct ixgb_adapter *adapter = netdev_priv(netdev);
- unsigned int first;
- unsigned int tx_flags = 0;
- int vlan_id = 0;
- int count = 0;
- int tso;
-
- if (test_bit(__IXGB_DOWN, &adapter->flags)) {
- dev_kfree_skb(skb);
- return NETDEV_TX_OK;
- }
-
- if (skb->len <= 0) {
- dev_kfree_skb(skb);
- return NETDEV_TX_OK;
- }
-
- if (unlikely(ixgb_maybe_stop_tx(netdev, &adapter->tx_ring,
- DESC_NEEDED)))
- return NETDEV_TX_BUSY;
-
- if (vlan_tx_tag_present(skb)) {
- tx_flags |= IXGB_TX_FLAGS_VLAN;
- vlan_id = vlan_tx_tag_get(skb);
- }
-
- first = adapter->tx_ring.next_to_use;
-
- tso = ixgb_tso(adapter, skb);
- if (tso < 0) {
- dev_kfree_skb(skb);
- return NETDEV_TX_OK;
- }
-
- if (likely(tso))
- tx_flags |= IXGB_TX_FLAGS_TSO;
- else if (ixgb_tx_csum(adapter, skb))
- tx_flags |= IXGB_TX_FLAGS_CSUM;
-
- count = ixgb_tx_map(adapter, skb, first);
-
- if (count) {
- ixgb_tx_queue(adapter, count, vlan_id, tx_flags);
- /* Make sure there is space in the ring for the next send. */
- ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, DESC_NEEDED);
-
- } else {
- dev_kfree_skb_any(skb);
- adapter->tx_ring.buffer_info[first].time_stamp = 0;
- adapter->tx_ring.next_to_use = first;
- }
-
- return NETDEV_TX_OK;
-}
-
-/**
- * ixgb_tx_timeout - Respond to a Tx Hang
- * @netdev: network interface device structure
- **/
-
-static void
-ixgb_tx_timeout(struct net_device *netdev)
-{
- struct ixgb_adapter *adapter = netdev_priv(netdev);
-
- /* Do the reset outside of interrupt context */
- schedule_work(&adapter->tx_timeout_task);
-}
-
-static void
-ixgb_tx_timeout_task(struct work_struct *work)
-{
- struct ixgb_adapter *adapter =
- container_of(work, struct ixgb_adapter, tx_timeout_task);
-
- adapter->tx_timeout_count++;
- ixgb_down(adapter, true);
- ixgb_up(adapter);
-}
-
-/**
- * ixgb_get_stats - Get System Network Statistics
- * @netdev: network interface device structure
- *
- * Returns the address of the device statistics structure.
- * The statistics are actually updated from the timer callback.
- **/
-
-static struct net_device_stats *
-ixgb_get_stats(struct net_device *netdev)
-{
- return &netdev->stats;
-}
-
-/**
- * ixgb_change_mtu - Change the Maximum Transfer Unit
- * @netdev: network interface device structure
- * @new_mtu: new value for maximum frame size
- *
- * Returns 0 on success, negative on failure
- **/
-
-static int
-ixgb_change_mtu(struct net_device *netdev, int new_mtu)
-{
- struct ixgb_adapter *adapter = netdev_priv(netdev);
- int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
- int old_max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
-
- /* MTU < 68 is an error for IPv4 traffic, just don't allow it */
- if ((new_mtu < 68) ||
- (max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) {
- netif_err(adapter, probe, adapter->netdev,
- "Invalid MTU setting %d\n", new_mtu);
- return -EINVAL;
- }
-
- if (old_max_frame == max_frame)
- return 0;
-
- if (netif_running(netdev))
- ixgb_down(adapter, true);
-
- adapter->rx_buffer_len = max_frame + 8; /* + 8 for errata */
-
- netdev->mtu = new_mtu;
-
- if (netif_running(netdev))
- ixgb_up(adapter);
-
- return 0;
-}
-
-/**
- * ixgb_update_stats - Update the board statistics counters.
- * @adapter: board private structure
- **/
-
-void
-ixgb_update_stats(struct ixgb_adapter *adapter)
-{
- struct net_device *netdev = adapter->netdev;
- struct pci_dev *pdev = adapter->pdev;
-
- /* Prevent stats update while adapter is being reset */
- if (pci_channel_offline(pdev))
- return;
-
- if ((netdev->flags & IFF_PROMISC) || (netdev->flags & IFF_ALLMULTI) ||
- (netdev_mc_count(netdev) > IXGB_MAX_NUM_MULTICAST_ADDRESSES)) {
- u64 multi = IXGB_READ_REG(&adapter->hw, MPRCL);
- u32 bcast_l = IXGB_READ_REG(&adapter->hw, BPRCL);
- u32 bcast_h = IXGB_READ_REG(&adapter->hw, BPRCH);
- u64 bcast = ((u64)bcast_h << 32) | bcast_l;
-
- multi |= ((u64)IXGB_READ_REG(&adapter->hw, MPRCH) << 32);
- /* fix up multicast stats by removing broadcasts */
- if (multi >= bcast)
- multi -= bcast;
-
- adapter->stats.mprcl += (multi & 0xFFFFFFFF);
- adapter->stats.mprch += (multi >> 32);
- adapter->stats.bprcl += bcast_l;
- adapter->stats.bprch += bcast_h;
- } else {
- adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL);
- adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH);
- adapter->stats.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL);
- adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH);
- }
- adapter->stats.tprl += IXGB_READ_REG(&adapter->hw, TPRL);
- adapter->stats.tprh += IXGB_READ_REG(&adapter->hw, TPRH);
- adapter->stats.gprcl += IXGB_READ_REG(&adapter->hw, GPRCL);
- adapter->stats.gprch += IXGB_READ_REG(&adapter->hw, GPRCH);
- adapter->stats.uprcl += IXGB_READ_REG(&adapter->hw, UPRCL);
- adapter->stats.uprch += IXGB_READ_REG(&adapter->hw, UPRCH);
- adapter->stats.vprcl += IXGB_READ_REG(&adapter->hw, VPRCL);
- adapter->stats.vprch += IXGB_READ_REG(&adapter->hw, VPRCH);
- adapter->stats.jprcl += IXGB_READ_REG(&adapter->hw, JPRCL);
- adapter->stats.jprch += IXGB_READ_REG(&adapter->hw, JPRCH);
- adapter->stats.gorcl += IXGB_READ_REG(&adapter->hw, GORCL);
- adapter->stats.gorch += IXGB_READ_REG(&adapter->hw, GORCH);
- adapter->stats.torl += IXGB_READ_REG(&adapter->hw, TORL);
- adapter->stats.torh += IXGB_READ_REG(&adapter->hw, TORH);
- adapter->stats.rnbc += IXGB_READ_REG(&adapter->hw, RNBC);
- adapter->stats.ruc += IXGB_READ_REG(&adapter->hw, RUC);
- adapter->stats.roc += IXGB_READ_REG(&adapter->hw, ROC);
- adapter->stats.rlec += IXGB_READ_REG(&adapter->hw, RLEC);
- adapter->stats.crcerrs += IXGB_READ_REG(&adapter->hw, CRCERRS);
- adapter->stats.icbc += IXGB_READ_REG(&adapter->hw, ICBC);
- adapter->stats.ecbc += IXGB_READ_REG(&adapter->hw, ECBC);
- adapter->stats.mpc += IXGB_READ_REG(&adapter->hw, MPC);
- adapter->stats.tptl += IXGB_READ_REG(&adapter->hw, TPTL);
- adapter->stats.tpth += IXGB_READ_REG(&adapter->hw, TPTH);
- adapter->stats.gptcl += IXGB_READ_REG(&adapter->hw, GPTCL);
- adapter->stats.gptch += IXGB_READ_REG(&adapter->hw, GPTCH);
- adapter->stats.bptcl += IXGB_READ_REG(&adapter->hw, BPTCL);
- adapter->stats.bptch += IXGB_READ_REG(&adapter->hw, BPTCH);
- adapter->stats.mptcl += IXGB_READ_REG(&adapter->hw, MPTCL);
- adapter->stats.mptch += IXGB_READ_REG(&adapter->hw, MPTCH);
- adapter->stats.uptcl += IXGB_READ_REG(&adapter->hw, UPTCL);
- adapter->stats.uptch += IXGB_READ_REG(&adapter->hw, UPTCH);
- adapter->stats.vptcl += IXGB_READ_REG(&adapter->hw, VPTCL);
- adapter->stats.vptch += IXGB_READ_REG(&adapter->hw, VPTCH);
- adapter->stats.jptcl += IXGB_READ_REG(&adapter->hw, JPTCL);
- adapter->stats.jptch += IXGB_READ_REG(&adapter->hw, JPTCH);
- adapter->stats.gotcl += IXGB_READ_REG(&adapter->hw, GOTCL);
- adapter->stats.gotch += IXGB_READ_REG(&adapter->hw, GOTCH);
- adapter->stats.totl += IXGB_READ_REG(&adapter->hw, TOTL);
- adapter->stats.toth += IXGB_READ_REG(&adapter->hw, TOTH);
- adapter->stats.dc += IXGB_READ_REG(&adapter->hw, DC);
- adapter->stats.plt64c += IXGB_READ_REG(&adapter->hw, PLT64C);
- adapter->stats.tsctc += IXGB_READ_REG(&adapter->hw, TSCTC);
- adapter->stats.tsctfc += IXGB_READ_REG(&adapter->hw, TSCTFC);
- adapter->stats.ibic += IXGB_READ_REG(&adapter->hw, IBIC);
- adapter->stats.rfc += IXGB_READ_REG(&adapter->hw, RFC);
- adapter->stats.lfc += IXGB_READ_REG(&adapter->hw, LFC);
- adapter->stats.pfrc += IXGB_READ_REG(&adapter->hw, PFRC);
- adapter->stats.pftc += IXGB_READ_REG(&adapter->hw, PFTC);
- adapter->stats.mcfrc += IXGB_READ_REG(&adapter->hw, MCFRC);
- adapter->stats.mcftc += IXGB_READ_REG(&adapter->hw, MCFTC);
- adapter->stats.xonrxc += IXGB_READ_REG(&adapter->hw, XONRXC);
- adapter->stats.xontxc += IXGB_READ_REG(&adapter->hw, XONTXC);
- adapter->stats.xoffrxc += IXGB_READ_REG(&adapter->hw, XOFFRXC);
- adapter->stats.xofftxc += IXGB_READ_REG(&adapter->hw, XOFFTXC);
- adapter->stats.rjc += IXGB_READ_REG(&adapter->hw, RJC);
-
- /* Fill out the OS statistics structure */
-
- netdev->stats.rx_packets = adapter->stats.gprcl;
- netdev->stats.tx_packets = adapter->stats.gptcl;
- netdev->stats.rx_bytes = adapter->stats.gorcl;
- netdev->stats.tx_bytes = adapter->stats.gotcl;
- netdev->stats.multicast = adapter->stats.mprcl;
- netdev->stats.collisions = 0;
-
- /* ignore RLEC as it reports errors for padded (<64bytes) frames
- * with a length in the type/len field */
- netdev->stats.rx_errors =
- /* adapter->stats.rnbc + */ adapter->stats.crcerrs +
- adapter->stats.ruc +
- adapter->stats.roc /*+ adapter->stats.rlec */ +
- adapter->stats.icbc +
- adapter->stats.ecbc + adapter->stats.mpc;
-
- /* see above
- * netdev->stats.rx_length_errors = adapter->stats.rlec;
- */
-
- netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
- netdev->stats.rx_fifo_errors = adapter->stats.mpc;
- netdev->stats.rx_missed_errors = adapter->stats.mpc;
- netdev->stats.rx_over_errors = adapter->stats.mpc;
-
- netdev->stats.tx_errors = 0;
- netdev->stats.rx_frame_errors = 0;
- netdev->stats.tx_aborted_errors = 0;
- netdev->stats.tx_carrier_errors = 0;
- netdev->stats.tx_fifo_errors = 0;
- netdev->stats.tx_heartbeat_errors = 0;
- netdev->stats.tx_window_errors = 0;
-}
-
-#define IXGB_MAX_INTR 10
-/**
- * ixgb_intr - Interrupt Handler
- * @irq: interrupt number
- * @data: pointer to a network interface device structure
- **/
-
-static irqreturn_t
-ixgb_intr(int irq, void *data)
-{
- struct net_device *netdev = data;
- struct ixgb_adapter *adapter = netdev_priv(netdev);
- struct ixgb_hw *hw = &adapter->hw;
- u32 icr = IXGB_READ_REG(hw, ICR);
-
- if (unlikely(!icr))
- return IRQ_NONE; /* Not our interrupt */
-
- if (unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC)))
- if (!test_bit(__IXGB_DOWN, &adapter->flags))
- mod_timer(&adapter->watchdog_timer, jiffies);
-
- if (napi_schedule_prep(&adapter->napi)) {
-
- /* Disable interrupts and register for poll. The flush
- of the posted write is intentionally left out.
- */
-
- IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
- __napi_schedule(&adapter->napi);
- }
- return IRQ_HANDLED;
-}
-
-/**
- * ixgb_clean - NAPI Rx polling callback
- * @adapter: board private structure
- **/
-
-static int
-ixgb_clean(struct napi_struct *napi, int budget)
-{
- struct ixgb_adapter *adapter = container_of(napi, struct ixgb_adapter, napi);
- int work_done = 0;
-
- ixgb_clean_tx_irq(adapter);
- ixgb_clean_rx_irq(adapter, &work_done, budget);
-
- /* If budget not fully consumed, exit the polling mode */
- if (work_done < budget) {
- napi_complete(napi);
- if (!test_bit(__IXGB_DOWN, &adapter->flags))
- ixgb_irq_enable(adapter);
- }
-
- return work_done;
-}
-
-/**
- * ixgb_clean_tx_irq - Reclaim resources after transmit completes
- * @adapter: board private structure
- **/
-
-static bool
-ixgb_clean_tx_irq(struct ixgb_adapter *adapter)
-{
- struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
- struct net_device *netdev = adapter->netdev;
- struct ixgb_tx_desc *tx_desc, *eop_desc;
- struct ixgb_buffer *buffer_info;
- unsigned int i, eop;
- bool cleaned = false;
-
- i = tx_ring->next_to_clean;
- eop = tx_ring->buffer_info[i].next_to_watch;
- eop_desc = IXGB_TX_DESC(*tx_ring, eop);
-
- while (eop_desc->status & IXGB_TX_DESC_STATUS_DD) {
-
- rmb(); /* read buffer_info after eop_desc */
- for (cleaned = false; !cleaned; ) {
- tx_desc = IXGB_TX_DESC(*tx_ring, i);
- buffer_info = &tx_ring->buffer_info[i];
-
- if (tx_desc->popts &
- (IXGB_TX_DESC_POPTS_TXSM |
- IXGB_TX_DESC_POPTS_IXSM))
- adapter->hw_csum_tx_good++;
-
- ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
-
- *(u32 *)&(tx_desc->status) = 0;
-
- cleaned = (i == eop);
- if (++i == tx_ring->count) i = 0;
- }
-
- eop = tx_ring->buffer_info[i].next_to_watch;
- eop_desc = IXGB_TX_DESC(*tx_ring, eop);
- }
-
- tx_ring->next_to_clean = i;
-
- if (unlikely(cleaned && netif_carrier_ok(netdev) &&
- IXGB_DESC_UNUSED(tx_ring) >= DESC_NEEDED)) {
- /* Make sure that anybody stopping the queue after this
- * sees the new next_to_clean. */
- smp_mb();
-
- if (netif_queue_stopped(netdev) &&
- !(test_bit(__IXGB_DOWN, &adapter->flags))) {
- netif_wake_queue(netdev);
- ++adapter->restart_queue;
- }
- }
-
- if (adapter->detect_tx_hung) {
- /* detect a transmit hang in hardware, this serializes the
- * check with the clearing of time_stamp and movement of i */
- adapter->detect_tx_hung = false;
- if (tx_ring->buffer_info[eop].time_stamp &&
- time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + HZ)
- && !(IXGB_READ_REG(&adapter->hw, STATUS) &
- IXGB_STATUS_TXOFF)) {
- /* detected Tx unit hang */
- netif_err(adapter, drv, adapter->netdev,
- "Detected Tx Unit Hang\n"
- " TDH <%x>\n"
- " TDT <%x>\n"
- " next_to_use <%x>\n"
- " next_to_clean <%x>\n"
- "buffer_info[next_to_clean]\n"
- " time_stamp <%lx>\n"
- " next_to_watch <%x>\n"
- " jiffies <%lx>\n"
- " next_to_watch.status <%x>\n",
- IXGB_READ_REG(&adapter->hw, TDH),
- IXGB_READ_REG(&adapter->hw, TDT),
- tx_ring->next_to_use,
- tx_ring->next_to_clean,
- tx_ring->buffer_info[eop].time_stamp,
- eop,
- jiffies,
- eop_desc->status);
- netif_stop_queue(netdev);
- }
- }
-
- return cleaned;
-}
-
-/**
- * ixgb_rx_checksum - Receive Checksum Offload for 82597.
- * @adapter: board private structure
- * @rx_desc: receive descriptor
- * @sk_buff: socket buffer with received data
- **/
-
-static void
-ixgb_rx_checksum(struct ixgb_adapter *adapter,
- struct ixgb_rx_desc *rx_desc,
- struct sk_buff *skb)
-{
- /* Ignore Checksum bit is set OR
- * TCP Checksum has not been calculated
- */
- if ((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) ||
- (!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) {
- skb_checksum_none_assert(skb);
- return;
- }
-
- /* At this point we know the hardware did the TCP checksum */
- /* now look at the TCP checksum error bit */
- if (rx_desc->errors & IXGB_RX_DESC_ERRORS_TCPE) {
- /* let the stack verify checksum errors */
- skb_checksum_none_assert(skb);
- adapter->hw_csum_rx_error++;
- } else {
- /* TCP checksum is good */
- skb->ip_summed = CHECKSUM_UNNECESSARY;
- adapter->hw_csum_rx_good++;
- }
-}
-
-/*
- * this should improve performance for small packets with large amounts
- * of reassembly being done in the stack
- */
-static void ixgb_check_copybreak(struct net_device *netdev,
- struct ixgb_buffer *buffer_info,
- u32 length, struct sk_buff **skb)
-{
- struct sk_buff *new_skb;
-
- if (length > copybreak)
- return;
-
- new_skb = netdev_alloc_skb_ip_align(netdev, length);
- if (!new_skb)
- return;
-
- skb_copy_to_linear_data_offset(new_skb, -NET_IP_ALIGN,
- (*skb)->data - NET_IP_ALIGN,
- length + NET_IP_ALIGN);
- /* save the skb in buffer_info as good */
- buffer_info->skb = *skb;
- *skb = new_skb;
-}
-
-/**
- * ixgb_clean_rx_irq - Send received data up the network stack,
- * @adapter: board private structure
- **/
-
-static bool
-ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do)
-{
- struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
- struct net_device *netdev = adapter->netdev;
- struct pci_dev *pdev = adapter->pdev;
- struct ixgb_rx_desc *rx_desc, *next_rxd;
- struct ixgb_buffer *buffer_info, *next_buffer, *next2_buffer;
- u32 length;
- unsigned int i, j;
- int cleaned_count = 0;
- bool cleaned = false;
-
- i = rx_ring->next_to_clean;
- rx_desc = IXGB_RX_DESC(*rx_ring, i);
- buffer_info = &rx_ring->buffer_info[i];
-
- while (rx_desc->status & IXGB_RX_DESC_STATUS_DD) {
- struct sk_buff *skb;
- u8 status;
-
- if (*work_done >= work_to_do)
- break;
-
- (*work_done)++;
- rmb(); /* read descriptor and rx_buffer_info after status DD */
- status = rx_desc->status;
- skb = buffer_info->skb;
- buffer_info->skb = NULL;
-
- prefetch(skb->data - NET_IP_ALIGN);
-
- if (++i == rx_ring->count)
- i = 0;
- next_rxd = IXGB_RX_DESC(*rx_ring, i);
- prefetch(next_rxd);
-
- j = i + 1;
- if (j == rx_ring->count)
- j = 0;
- next2_buffer = &rx_ring->buffer_info[j];
- prefetch(next2_buffer);
-
- next_buffer = &rx_ring->buffer_info[i];
-
- cleaned = true;
- cleaned_count++;
-
- dma_unmap_single(&pdev->dev,
- buffer_info->dma,
- buffer_info->length,
- DMA_FROM_DEVICE);
- buffer_info->dma = 0;
-
- length = le16_to_cpu(rx_desc->length);
- rx_desc->length = 0;
-
- if (unlikely(!(status & IXGB_RX_DESC_STATUS_EOP))) {
-
- /* All receives must fit into a single buffer */
-
- IXGB_DBG("Receive packet consumed multiple buffers "
- "length<%x>\n", length);
-
- dev_kfree_skb_irq(skb);
- goto rxdesc_done;
- }
-
- if (unlikely(rx_desc->errors &
- (IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE |
- IXGB_RX_DESC_ERRORS_P | IXGB_RX_DESC_ERRORS_RXE))) {
- dev_kfree_skb_irq(skb);
- goto rxdesc_done;
- }
-
- ixgb_check_copybreak(netdev, buffer_info, length, &skb);
-
- /* Good Receive */
- skb_put(skb, length);
-
- /* Receive Checksum Offload */
- ixgb_rx_checksum(adapter, rx_desc, skb);
-
- skb->protocol = eth_type_trans(skb, netdev);
- if (status & IXGB_RX_DESC_STATUS_VP)
- __vlan_hwaccel_put_tag(skb,
- le16_to_cpu(rx_desc->special));
-
- netif_receive_skb(skb);
-
-rxdesc_done:
- /* clean up descriptor, might be written over by hw */
- rx_desc->status = 0;
-
- /* return some buffers to hardware, one at a time is too slow */
- if (unlikely(cleaned_count >= IXGB_RX_BUFFER_WRITE)) {
- ixgb_alloc_rx_buffers(adapter, cleaned_count);
- cleaned_count = 0;
- }
-
- /* use prefetched values */
- rx_desc = next_rxd;
- buffer_info = next_buffer;
- }
-
- rx_ring->next_to_clean = i;
-
- cleaned_count = IXGB_DESC_UNUSED(rx_ring);
- if (cleaned_count)
- ixgb_alloc_rx_buffers(adapter, cleaned_count);
-
- return cleaned;
-}
-
-/**
- * ixgb_alloc_rx_buffers - Replace used receive buffers
- * @adapter: address of board private structure
- **/
-
-static void
-ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter, int cleaned_count)
-{
- struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
- struct net_device *netdev = adapter->netdev;
- struct pci_dev *pdev = adapter->pdev;
- struct ixgb_rx_desc *rx_desc;
- struct ixgb_buffer *buffer_info;
- struct sk_buff *skb;
- unsigned int i;
- long cleancount;
-
- i = rx_ring->next_to_use;
- buffer_info = &rx_ring->buffer_info[i];
- cleancount = IXGB_DESC_UNUSED(rx_ring);
-
-
- /* leave three descriptors unused */
- while (--cleancount > 2 && cleaned_count--) {
- /* recycle! its good for you */
- skb = buffer_info->skb;
- if (skb) {
- skb_trim(skb, 0);
- goto map_skb;
- }
-
- skb = netdev_alloc_skb_ip_align(netdev, adapter->rx_buffer_len);
- if (unlikely(!skb)) {
- /* Better luck next round */
- adapter->alloc_rx_buff_failed++;
- break;
- }
-
- buffer_info->skb = skb;
- buffer_info->length = adapter->rx_buffer_len;
-map_skb:
- buffer_info->dma = dma_map_single(&pdev->dev,
- skb->data,
- adapter->rx_buffer_len,
- DMA_FROM_DEVICE);
-
- rx_desc = IXGB_RX_DESC(*rx_ring, i);
- rx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
- /* guarantee DD bit not set now before h/w gets descriptor
- * this is the rest of the workaround for h/w double
- * writeback. */
- rx_desc->status = 0;
-
-
- if (++i == rx_ring->count) i = 0;
- buffer_info = &rx_ring->buffer_info[i];
- }
-
- if (likely(rx_ring->next_to_use != i)) {
- rx_ring->next_to_use = i;
- if (unlikely(i-- == 0))
- i = (rx_ring->count - 1);
-
- /* Force memory writes to complete before letting h/w
- * know there are new descriptors to fetch. (Only
- * applicable for weak-ordered memory model archs, such
- * as IA-64). */
- wmb();
- IXGB_WRITE_REG(&adapter->hw, RDT, i);
- }
-}
-
-static void
-ixgb_vlan_strip_enable(struct ixgb_adapter *adapter)
-{
- u32 ctrl;
-
- /* enable VLAN tag insert/strip */
- ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
- ctrl |= IXGB_CTRL0_VME;
- IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
-}
-
-static void
-ixgb_vlan_strip_disable(struct ixgb_adapter *adapter)
-{
- u32 ctrl;
-
- /* disable VLAN tag insert/strip */
- ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
- ctrl &= ~IXGB_CTRL0_VME;
- IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
-}
-
-static void
-ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
-{
- struct ixgb_adapter *adapter = netdev_priv(netdev);
- u32 vfta, index;
-
- /* add VID to filter table */
-
- index = (vid >> 5) & 0x7F;
- vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
- vfta |= (1 << (vid & 0x1F));
- ixgb_write_vfta(&adapter->hw, index, vfta);
- set_bit(vid, adapter->active_vlans);
-}
-
-static void
-ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
-{
- struct ixgb_adapter *adapter = netdev_priv(netdev);
- u32 vfta, index;
-
- /* remove VID from filter table */
-
- index = (vid >> 5) & 0x7F;
- vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
- vfta &= ~(1 << (vid & 0x1F));
- ixgb_write_vfta(&adapter->hw, index, vfta);
- clear_bit(vid, adapter->active_vlans);
-}
-
-static void
-ixgb_restore_vlan(struct ixgb_adapter *adapter)
-{
- u16 vid;
-
- for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
- ixgb_vlan_rx_add_vid(adapter->netdev, vid);
-}
-
-#ifdef CONFIG_NET_POLL_CONTROLLER
-/*
- * Polling 'interrupt' - used by things like netconsole to send skbs
- * without having to re-enable interrupts. It's not called while
- * the interrupt routine is executing.
- */
-
-static void ixgb_netpoll(struct net_device *dev)
-{
- struct ixgb_adapter *adapter = netdev_priv(dev);
-
- disable_irq(adapter->pdev->irq);
- ixgb_intr(adapter->pdev->irq, dev);
- enable_irq(adapter->pdev->irq);
-}
-#endif
-
-/**
- * ixgb_io_error_detected() - called when PCI error is detected
- * @pdev pointer to pci device with error
- * @state pci channel state after error
- *
- * This callback is called by the PCI subsystem whenever
- * a PCI bus error is detected.
- */
-static pci_ers_result_t ixgb_io_error_detected(struct pci_dev *pdev,
- enum pci_channel_state state)
-{
- struct net_device *netdev = pci_get_drvdata(pdev);
- struct ixgb_adapter *adapter = netdev_priv(netdev);
-
- netif_device_detach(netdev);
-
- if (state == pci_channel_io_perm_failure)
- return PCI_ERS_RESULT_DISCONNECT;
-
- if (netif_running(netdev))
- ixgb_down(adapter, true);
-
- pci_disable_device(pdev);
-
- /* Request a slot reset. */
- return PCI_ERS_RESULT_NEED_RESET;
-}
-
-/**
- * ixgb_io_slot_reset - called after the pci bus has been reset.
- * @pdev pointer to pci device with error
- *
- * This callback is called after the PCI bus has been reset.
- * Basically, this tries to restart the card from scratch.
- * This is a shortened version of the device probe/discovery code,
- * it resembles the first-half of the ixgb_probe() routine.
- */
-static pci_ers_result_t ixgb_io_slot_reset(struct pci_dev *pdev)
-{
- struct net_device *netdev = pci_get_drvdata(pdev);
- struct ixgb_adapter *adapter = netdev_priv(netdev);
-
- if (pci_enable_device(pdev)) {
- netif_err(adapter, probe, adapter->netdev,
- "Cannot re-enable PCI device after reset\n");
- return PCI_ERS_RESULT_DISCONNECT;
- }
-
- /* Perform card reset only on one instance of the card */
- if (0 != PCI_FUNC (pdev->devfn))
- return PCI_ERS_RESULT_RECOVERED;
-
- pci_set_master(pdev);
-
- netif_carrier_off(netdev);
- netif_stop_queue(netdev);
- ixgb_reset(adapter);
-
- /* Make sure the EEPROM is good */
- if (!ixgb_validate_eeprom_checksum(&adapter->hw)) {
- netif_err(adapter, probe, adapter->netdev,
- "After reset, the EEPROM checksum is not valid\n");
- return PCI_ERS_RESULT_DISCONNECT;
- }
- ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
- memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
-
- if (!is_valid_ether_addr(netdev->perm_addr)) {
- netif_err(adapter, probe, adapter->netdev,
- "After reset, invalid MAC address\n");
- return PCI_ERS_RESULT_DISCONNECT;
- }
-
- return PCI_ERS_RESULT_RECOVERED;
-}
-
-/**
- * ixgb_io_resume - called when its OK to resume normal operations
- * @pdev pointer to pci device with error
- *
- * The error recovery driver tells us that its OK to resume
- * normal operation. Implementation resembles the second-half
- * of the ixgb_probe() routine.
- */
-static void ixgb_io_resume(struct pci_dev *pdev)
-{
- struct net_device *netdev = pci_get_drvdata(pdev);
- struct ixgb_adapter *adapter = netdev_priv(netdev);
-
- pci_set_master(pdev);
-
- if (netif_running(netdev)) {
- if (ixgb_up(adapter)) {
- pr_err("can't bring device back up after reset\n");
- return;
- }
- }
-
- netif_device_attach(netdev);
- mod_timer(&adapter->watchdog_timer, jiffies);
-}
-
-/* ixgb_main.c */