diff options
Diffstat (limited to 'drivers/net/ixgb/ixgb_main.c')
| -rw-r--r-- | drivers/net/ixgb/ixgb_main.c | 2166 |
1 files changed, 2166 insertions, 0 deletions
diff --git a/drivers/net/ixgb/ixgb_main.c b/drivers/net/ixgb/ixgb_main.c new file mode 100644 index 000000000000..7d26623d8592 --- /dev/null +++ b/drivers/net/ixgb/ixgb_main.c @@ -0,0 +1,2166 @@ +/******************************************************************************* + + + Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved. + + This program is free software; you can redistribute it and/or modify it + under the terms of the GNU General Public License as published by the Free + Software Foundation; either version 2 of the License, or (at your option) + any later version. + + This program is distributed in the hope that 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., 59 + Temple Place - Suite 330, Boston, MA 02111-1307, USA. + + The full GNU General Public License is included in this distribution in the + file called LICENSE. + + Contact Information: + Linux NICS <linux.nics@intel.com> + Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 + +*******************************************************************************/ + +#include "ixgb.h" + +/* Change Log + * 1.0.88 01/05/05 + * - include fix to the condition that determines when to quit NAPI - Robert Olsson + * - use netif_poll_{disable/enable} to synchronize between NAPI and i/f up/down + * 1.0.84 10/26/04 + * - reset buffer_info->dma in Tx resource cleanup logic + * 1.0.83 10/12/04 + * - sparse cleanup - shemminger@osdl.org + * - fix tx resource cleanup logic + */ + +char ixgb_driver_name[] = "ixgb"; +char ixgb_driver_string[] = "Intel(R) PRO/10GbE Network Driver"; + +#ifndef CONFIG_IXGB_NAPI +#define DRIVERNAPI +#else +#define DRIVERNAPI "-NAPI" +#endif +char ixgb_driver_version[] = "1.0.90-k2"DRIVERNAPI; +char ixgb_copyright[] = "Copyright (c) 1999-2005 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_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, struct pt_regs *regs); +static boolean_t ixgb_clean_tx_irq(struct ixgb_adapter *adapter); +#ifdef CONFIG_IXGB_NAPI +static int ixgb_clean(struct net_device *netdev, 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); +void ixgb_set_ethtool_ops(struct net_device *netdev); +static void ixgb_tx_timeout(struct net_device *dev); +static void ixgb_tx_timeout_task(struct net_device *dev); +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); + +static int ixgb_notify_reboot(struct notifier_block *, unsigned long event, + void *ptr); +static int ixgb_suspend(struct pci_dev *pdev, uint32_t state); + +#ifdef CONFIG_NET_POLL_CONTROLLER +/* for netdump / net console */ +static void ixgb_netpoll(struct net_device *dev); +#endif + +struct notifier_block ixgb_notifier_reboot = { + .notifier_call = ixgb_notify_reboot, + .next = NULL, + .priority = 0 +}; + +/* Exported from other modules */ + +extern void ixgb_check_options(struct ixgb_adapter *adapter); + +static struct pci_driver ixgb_driver = { + .name = ixgb_driver_name, + .id_table = ixgb_pci_tbl, + .probe = ixgb_probe, + .remove = __devexit_p(ixgb_remove), + /* Power Managment Hooks */ + .suspend = NULL, + .resume = NULL +}; + +MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>"); +MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver"); +MODULE_LICENSE("GPL"); + +/* some defines for controlling descriptor fetches in h/w */ +#define RXDCTL_PTHRESH_DEFAULT 128 /* chip considers prefech below this */ +#define RXDCTL_HTHRESH_DEFAULT 16 /* chip will only prefetch if tail is + pushed this many descriptors from head */ +#define RXDCTL_WTHRESH_DEFAULT 16 /* chip writes back at this many or RXT0 */ + +/** + * 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) +{ + int ret; + printk(KERN_INFO "%s - version %s\n", + ixgb_driver_string, ixgb_driver_version); + + printk(KERN_INFO "%s\n", ixgb_copyright); + + ret = pci_module_init(&ixgb_driver); + if(ret >= 0) { + register_reboot_notifier(&ixgb_notifier_reboot); + } + return ret; +} + +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) +{ + unregister_reboot_notifier(&ixgb_notifier_reboot); + 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 inline 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 inline void +ixgb_irq_enable(struct ixgb_adapter *adapter) +{ + if(atomic_dec_and_test(&adapter->irq_sem)) { + IXGB_WRITE_REG(&adapter->hw, IMS, + IXGB_INT_RXT0 | IXGB_INT_RXDMT0 | IXGB_INT_TXDW | + IXGB_INT_RXO | IXGB_INT_LSC); + IXGB_WRITE_FLUSH(&adapter->hw); + } +} + +int +ixgb_up(struct ixgb_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + int err; + 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_set_multi(netdev); + + ixgb_restore_vlan(adapter); + + ixgb_configure_tx(adapter); + ixgb_setup_rctl(adapter); + ixgb_configure_rx(adapter); + ixgb_alloc_rx_buffers(adapter); + +#ifdef CONFIG_PCI_MSI + { + boolean_t pcix = (IXGB_READ_REG(&adapter->hw, STATUS) & + IXGB_STATUS_PCIX_MODE) ? TRUE : FALSE; + adapter->have_msi = TRUE; + + if (!pcix) + adapter->have_msi = FALSE; + else if((err = pci_enable_msi(adapter->pdev))) { + printk (KERN_ERR + "Unable to allocate MSI interrupt Error: %d\n", err); + adapter->have_msi = FALSE; + /* proceed to try to request regular interrupt */ + } + } + +#endif + if((err = request_irq(adapter->pdev->irq, &ixgb_intr, + SA_SHIRQ | SA_SAMPLE_RANDOM, + netdev->name, netdev))) + return err; + + /* disable interrupts and get the hardware into a known state */ + IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff); + + 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); + ixgb_irq_enable(adapter); + +#ifdef CONFIG_IXGB_NAPI + netif_poll_enable(netdev); +#endif + return 0; +} + +void +ixgb_down(struct ixgb_adapter *adapter, boolean_t kill_watchdog) +{ + struct net_device *netdev = adapter->netdev; + + ixgb_irq_disable(adapter); + free_irq(adapter->pdev->irq, netdev); +#ifdef CONFIG_PCI_MSI + if(adapter->have_msi == TRUE) + pci_disable_msi(adapter->pdev); + +#endif + if(kill_watchdog) + del_timer_sync(&adapter->watchdog_timer); +#ifdef CONFIG_IXGB_NAPI + netif_poll_disable(netdev); +#endif + 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) +{ + + ixgb_adapter_stop(&adapter->hw); + if(!ixgb_init_hw(&adapter->hw)) + IXGB_DBG("ixgb_init_hw failed.\n"); +} + +/** + * 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))) { + pci_using_dac = 1; + } else { + if((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK))) { + IXGB_ERR("No usable DMA configuration, aborting\n"); + return err; + } + pci_using_dac = 0; + } + + if((err = pci_request_regions(pdev, ixgb_driver_name))) + return err; + + pci_set_master(pdev); + + netdev = alloc_etherdev(sizeof(struct ixgb_adapter)); + if(!netdev) { + err = -ENOMEM; + goto err_alloc_etherdev; + } + + SET_MODULE_OWNER(netdev); + SET_NETDEV_DEV(netdev, &pdev->dev); + + pci_set_drvdata(pdev, netdev); + adapter = netdev->priv; + adapter->netdev = netdev; + adapter->pdev = pdev; + adapter->hw.back = adapter; + + 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 = HZ; +#ifdef CONFIG_IXGB_NAPI + netdev->poll = &ixgb_clean; + netdev->weight = 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 + + 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; +#ifdef NETIF_F_TSO + netdev->features |= NETIF_F_TSO; +#endif + + if(pci_using_dac) + netdev->features |= NETIF_F_HIGHDMA; + + /* make sure the EEPROM is good */ + + if(!ixgb_validate_eeprom_checksum(&adapter->hw)) { + printk(KERN_ERR "The EEPROM Checksum Is Not Valid\n"); + err = -EIO; + goto err_eeprom; + } + + ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr); + + if(!is_valid_ether_addr(netdev->dev_addr)) { + 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, + (void (*)(void *))ixgb_tx_timeout_task, netdev); + + 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); + + printk(KERN_INFO "%s: Intel(R) PRO/10GbE Network Connection\n", + netdev->name); + 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); + 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; + + 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; + + adapter->rx_buffer_len = IXGB_RXBUFFER_2048; + + hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH; + + if((hw->device_id == IXGB_DEVICE_ID_82597EX) + ||(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 */ + printk(KERN_ERR "ixgb: 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; + 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; + + 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) { + return -ENOMEM; + } + memset(txdr->buffer_info, 0, size); + + /* round up to nearest 4K */ + + txdr->size = txdr->count * sizeof(struct ixgb_tx_desc); + IXGB_ROUNDUP(txdr->size, 4096); + + txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma); + if(!txdr->desc) { + vfree(txdr->buffer_info); + 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) { + return -ENOMEM; + } + memset(rxdr->buffer_info, 0, size); + + /* Round up to nearest 4K */ + + rxdr->size = rxdr->count * sizeof(struct ixgb_rx_desc); + IXGB_ROUNDUP(rxdr->size, 4096); + + rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma); + + if(!rxdr->desc) { + vfree(rxdr->buffer_info); + 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; + + switch (adapter->rx_buffer_len) { + case IXGB_RXBUFFER_2048: + default: + rctl |= IXGB_RCTL_BSIZE_2048; + break; + case IXGB_RXBUFFER_4096: + rctl |= IXGB_RCTL_BSIZE_4096; + break; + case IXGB_RXBUFFER_8192: + rctl |= IXGB_RCTL_BSIZE_8192; + break; + case IXGB_RXBUFFER_16384: + rctl |= IXGB_RCTL_BSIZE_16384; + break; + } + + 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 inline 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); + buffer_info->dma = 0; + } + if(buffer_info->skb) { + dev_kfree_skb_any(buffer_info->skb); + buffer_info->skb = NULL; + } +} + +/** + * 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; + 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; + 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[netdev->mc_count * 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)) { + printk(KERN_INFO "ixgb: %s NIC Link is Up %d Mbps %s\n", + netdev->name, 10000, "Full Duplex"); + 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; + printk(KERN_INFO + "ixgb: %s NIC Link is Down\n", + netdev->name); + 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 inline int +ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb) +{ +#ifdef NETIF_F_TSO + 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_shinfo(skb)->tso_size)) { + if (skb_header_cloned(skb)) { + err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); + if (err) + return err; + } + + hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2)); + mss = skb_shinfo(skb)->tso_size; + skb->nh.iph->tot_len = 0; + skb->nh.iph->check = 0; + skb->h.th->check = ~csum_tcpudp_magic(skb->nh.iph->saddr, + skb->nh.iph->daddr, + 0, IPPROTO_TCP, 0); + ipcss = skb->nh.raw - skb->data; + ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data; + ipcse = skb->h.raw - skb->data - 1; + tucss = skb->h.raw - skb->data; + tucso = (void *)&(skb->h.th->check) - (void *)skb->data; + tucse = 0; + + i = adapter->tx_ring.next_to_use; + context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i); + + 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_RS + | 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; + } +#endif + + return 0; +} + +static inline 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_HW)) { + css = skb->h.raw - skb->data; + cso = (skb->h.raw + skb->csum) - skb->data; + + i = adapter->tx_ring.next_to_use; + context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i); + + 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_RS + | 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 inline 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 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_JUMBO_FRAME_SIZE); + buffer_info->length = size; + buffer_info->dma = + pci_map_single(adapter->pdev, + skb->data + offset, + size, + PCI_DMA_TODEVICE); + buffer_info->time_stamp = jiffies; + + 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_JUMBO_FRAME_SIZE); + 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; + + 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 inline 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); +} + +/* 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) + \ + MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 + +static int +ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev) +{ + struct ixgb_adapter *adapter = netdev->priv; + 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; + } + + spin_lock_irqsave(&adapter->tx_lock, flags); + if(unlikely(IXGB_DESC_UNUSED(&adapter->tx_ring) < DESC_NEEDED)) { + netif_stop_queue(netdev); + spin_unlock_irqrestore(&adapter->tx_lock, flags); + return 1; + } + spin_unlock_irqrestore(&adapter->tx_lock, flags); + + 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); + return NETDEV_TX_OK; + } + + if (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; + + return 0; +} + +/** + * 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; + + /* Do the reset outside of interrupt context */ + schedule_work(&adapter->tx_timeout_task); +} + +static void +ixgb_tx_timeout_task(struct net_device *netdev) +{ + struct ixgb_adapter *adapter = netdev->priv; + + 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; + + 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; + 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)) { + IXGB_ERR("Invalid MTU setting\n"); + return -EINVAL; + } + + if((max_frame <= IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) + || (max_frame <= IXGB_RXBUFFER_2048)) { + adapter->rx_buffer_len = IXGB_RXBUFFER_2048; + + } else if(max_frame <= IXGB_RXBUFFER_4096) { + adapter->rx_buffer_len = IXGB_RXBUFFER_4096; + + } else if(max_frame <= IXGB_RXBUFFER_8192) { + adapter->rx_buffer_len = IXGB_RXBUFFER_8192; + + } else { + adapter->rx_buffer_len = IXGB_RXBUFFER_16384; + } + + 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) +{ + 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.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL); + adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH); + adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL); + adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH); + 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; + + adapter->net_stats.rx_dropped = 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 + * @pt_regs: CPU registers structure + **/ + +static irqreturn_t +ixgb_intr(int irq, void *data, struct pt_regs *regs) +{ + struct net_device *netdev = data; + struct ixgb_adapter *adapter = netdev->priv; + 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)) { + + /* 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); + } +#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 net_device *netdev, int *budget) +{ + struct ixgb_adapter *adapter = netdev->priv; + int work_to_do = min(*budget, netdev->quota); + int tx_cleaned; + int work_done = 0; + + tx_cleaned = ixgb_clean_tx_irq(adapter); + ixgb_clean_rx_irq(adapter, &work_done, work_to_do); + + *budget -= work_done; + netdev->quota -= work_done; + + /* if no Tx and not enough Rx work done, exit the polling mode */ + if((!tx_cleaned && (work_done == 0)) || !netif_running(netdev)) { + netif_rx_complete(netdev); + ixgb_irq_enable(adapter); + return 0; + } + + return 1; +} +#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; + + spin_lock(&adapter->tx_lock); + if(cleaned && netif_queue_stopped(netdev) && netif_carrier_ok(netdev) && + (IXGB_DESC_UNUSED(tx_ring) > IXGB_TX_QUEUE_WAKE)) { + + 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[i].dma && + time_after(jiffies, tx_ring->buffer_info[i].time_stamp + HZ) + && !(IXGB_READ_REG(&adapter->hw, STATUS) & + IXGB_STATUS_TXOFF)) + 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 inline 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; + struct sk_buff *skb, *next_skb; + 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) { + +#ifdef CONFIG_IXGB_NAPI + if(*work_done >= work_to_do) + break; + + (*work_done)++; +#endif + skb = buffer_info->skb; + 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(!(rx_desc->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); + rx_desc->status = 0; + buffer_info->skb = NULL; + + rx_desc = next_rxd; + buffer_info = next_buffer; + continue; + } + + 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); + rx_desc->status = 0; + buffer_info->skb = NULL; + + rx_desc = next_rxd; + buffer_info = next_buffer; + continue; + } + + /* 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 && (rx_desc->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 && (rx_desc->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; + + rx_desc->status = 0; + buffer_info->skb = NULL; + + 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; + int num_group_tail_writes; + long cleancount; + + i = rx_ring->next_to_use; + buffer_info = &rx_ring->buffer_info[i]; + cleancount = IXGB_DESC_UNUSED(rx_ring); + + num_group_tail_writes = IXGB_RX_BUFFER_WRITE; + + /* leave one descriptor unused */ + while(--cleancount > 0) { + rx_desc = IXGB_RX_DESC(*rx_ring, i); + + skb = dev_alloc_skb(adapter->rx_buffer_len + NET_IP_ALIGN); + + if(unlikely(!skb)) { + /* Better luck next round */ + 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); + + skb->dev = netdev; + + buffer_info->skb = skb; + buffer_info->length = adapter->rx_buffer_len; + buffer_info->dma = + pci_map_single(pdev, + skb->data, + adapter->rx_buffer_len, + PCI_DMA_FROMDEVICE); + + rx_desc->buff_addr = cpu_to_le64(buffer_info->dma); + + if((i & ~(num_group_tail_writes- 1)) == i) { + /* 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); + } + + if(++i == rx_ring->count) i = 0; + buffer_info = &rx_ring->buffer_info[i]; + } + + rx_ring->next_to_use = 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; + 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; + 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; + uint32_t vfta, index; + + ixgb_irq_disable(adapter); + + if(adapter->vlgrp) + adapter->vlgrp->vlan_devices[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(!adapter->vlgrp->vlan_devices[vid]) + continue; + ixgb_vlan_rx_add_vid(adapter->netdev, vid); + } + } +} + +/** + * ixgb_notify_reboot - handles OS notification of reboot event. + * @param nb notifier block, unused + * @param event Event being passed to driver to act upon + * @param p A pointer to our net device + **/ +static int +ixgb_notify_reboot(struct notifier_block *nb, unsigned long event, void *p) +{ + struct pci_dev *pdev = NULL; + + switch(event) { + case SYS_DOWN: + case SYS_HALT: + case SYS_POWER_OFF: + while ((pdev = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pdev))) { + if (pci_dev_driver(pdev) == &ixgb_driver) + ixgb_suspend(pdev, 3); + } + } + return NOTIFY_DONE; +} + +/** + * ixgb_suspend - driver suspend function called from notify. + * @param pdev pci driver structure used for passing to + * @param state power state to enter + **/ +static int +ixgb_suspend(struct pci_dev *pdev, uint32_t state) +{ + struct net_device *netdev = pci_get_drvdata(pdev); + struct ixgb_adapter *adapter = netdev->priv; + + netif_device_detach(netdev); + + if(netif_running(netdev)) + ixgb_down(adapter, TRUE); + + pci_save_state(pdev); + + state = (state > 0) ? 3 : 0; + pci_set_power_state(pdev, state); + msec_delay(200); + + return 0; +} + +#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 = dev->priv; + disable_irq(adapter->pdev->irq); + ixgb_intr(adapter->pdev->irq, dev, NULL); + enable_irq(adapter->pdev->irq); +} +#endif + +/* ixgb_main.c */ |