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 00000000000..7d26623d859 --- /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->da |