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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [net/] [e1000/] [e1000_main.c] - Rev 1765
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/******************************************************************************* Copyright(c) 1999 - 2004 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 "e1000.h" /* Change Log * * 5.2.30.1 1/29/03 * o Set VLAN filtering to IEEE 802.1Q after reset so we don't break * SoL connections that use VLANs. * o Allow 1000/Full setting for AutoNeg param for Fiber connections * Jon D Mason [jonmason@us.ibm.com]. * o Race between Tx queue and Tx clean fixed with a spin lock. * o Added netpoll support. * o Fixed endianess bug causing ethtool loopback diags to fail on ppc. * o Use pdev->irq rather than netdev->irq in preparation for MSI support. * o Report driver message on user override of InterruptThrottleRate * module parameter. * o Change I/O address storage from uint32_t to unsigned long. * * 5.2.22 10/15/03 * o Bug fix: SERDES devices might be connected to a back-plane * switch that doesn't support auto-neg, so add the capability * to force 1000/Full. Also, since forcing 1000/Full, sample * RxSynchronize bit to detect link state. * o Bug fix: Flow control settings for hi/lo watermark didn't * consider changes in the Rx FIFO size, which could occur with * Jumbo Frames or with the reduced FIFO in 82547. * o Better propagation of error codes. [Janice Girouard * (janiceg@us.ibm.com)]. * o Bug fix: hang under heavy Tx stress when running out of Tx * descriptors; wasn't clearing context descriptor when backing * out of send because of no-resource condition. * o Bug fix: check netif_running in dev->poll so we don't have to * hang in dev->close until all polls are finished. [Robert * Ollson (robert.olsson@data.slu.se)]. * o Revert TxDescriptor ring size back to 256 since change to 1024 * wasn't accepted into the kernel. * * 5.2.16 8/8/03 */ char e1000_driver_name[] = "e1000"; char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver"; char e1000_driver_version[] = "5.2.30.1-k1"; char e1000_copyright[] = "Copyright (c) 1999-2004 Intel Corporation."; /* e1000_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 e1000_pci_tbl[] = { {0x8086, 0x1000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {0x8086, 0x1001, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {0x8086, 0x1004, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {0x8086, 0x1008, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {0x8086, 0x1009, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {0x8086, 0x100C, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {0x8086, 0x100D, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {0x8086, 0x100E, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {0x8086, 0x100F, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {0x8086, 0x1010, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {0x8086, 0x1011, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {0x8086, 0x1012, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {0x8086, 0x1013, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {0x8086, 0x1015, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {0x8086, 0x1016, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {0x8086, 0x1017, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {0x8086, 0x1018, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {0x8086, 0x1019, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {0x8086, 0x101D, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {0x8086, 0x101E, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {0x8086, 0x1026, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {0x8086, 0x1027, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {0x8086, 0x1028, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {0x8086, 0x1075, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {0x8086, 0x1076, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {0x8086, 0x1077, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {0x8086, 0x1078, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {0x8086, 0x1079, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {0x8086, 0x107A, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {0x8086, 0x107B, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, /* required last entry */ {0,} }; MODULE_DEVICE_TABLE(pci, e1000_pci_tbl); int e1000_up(struct e1000_adapter *adapter); void e1000_down(struct e1000_adapter *adapter); void e1000_reset(struct e1000_adapter *adapter); int e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx); int e1000_setup_tx_resources(struct e1000_adapter *adapter); int e1000_setup_rx_resources(struct e1000_adapter *adapter); void e1000_free_tx_resources(struct e1000_adapter *adapter); void e1000_free_rx_resources(struct e1000_adapter *adapter); void e1000_update_stats(struct e1000_adapter *adapter); /* Local Function Prototypes */ static int e1000_init_module(void); static void e1000_exit_module(void); static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent); static void __devexit e1000_remove(struct pci_dev *pdev); static int e1000_sw_init(struct e1000_adapter *adapter); static int e1000_open(struct net_device *netdev); static int e1000_close(struct net_device *netdev); static void e1000_configure_tx(struct e1000_adapter *adapter); static void e1000_configure_rx(struct e1000_adapter *adapter); static void e1000_setup_rctl(struct e1000_adapter *adapter); static void e1000_clean_tx_ring(struct e1000_adapter *adapter); static void e1000_clean_rx_ring(struct e1000_adapter *adapter); static void e1000_set_multi(struct net_device *netdev); static void e1000_update_phy_info(unsigned long data); static void e1000_watchdog(unsigned long data); static void e1000_82547_tx_fifo_stall(unsigned long data); static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev); static struct net_device_stats * e1000_get_stats(struct net_device *netdev); static int e1000_change_mtu(struct net_device *netdev, int new_mtu); static int e1000_set_mac(struct net_device *netdev, void *p); static inline void e1000_irq_disable(struct e1000_adapter *adapter); static inline void e1000_irq_enable(struct e1000_adapter *adapter); static irqreturn_t e1000_intr(int irq, void *data, struct pt_regs *regs); static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter); #ifdef CONFIG_E1000_NAPI static int e1000_clean(struct net_device *netdev, int *budget); static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter, int *work_done, int work_to_do); #else static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter); #endif static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter); static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd); static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd); static void e1000_enter_82542_rst(struct e1000_adapter *adapter); static void e1000_leave_82542_rst(struct e1000_adapter *adapter); static inline void e1000_rx_checksum(struct e1000_adapter *adapter, struct e1000_rx_desc *rx_desc, struct sk_buff *skb); static void e1000_tx_timeout(struct net_device *dev); static void e1000_tx_timeout_task(struct net_device *dev); static void e1000_smartspeed(struct e1000_adapter *adapter); static inline int e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct sk_buff *skb); static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp); static void e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid); static void e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid); static void e1000_restore_vlan(struct e1000_adapter *adapter); static int e1000_notify_reboot(struct notifier_block *, unsigned long event, void *ptr); static int e1000_suspend(struct pci_dev *pdev, uint32_t state); #ifdef CONFIG_PM static int e1000_resume(struct pci_dev *pdev); #endif #ifdef CONFIG_NET_POLL_CONTROLLER /* for netdump / net console */ static void e1000_netpoll (struct net_device *dev); #endif struct notifier_block e1000_notifier_reboot = { .notifier_call = e1000_notify_reboot, .next = NULL, .priority = 0 }; /* Exported from other modules */ extern void e1000_check_options(struct e1000_adapter *adapter); extern int e1000_ethtool_ioctl(struct net_device *netdev, struct ifreq *ifr); static struct pci_driver e1000_driver = { .name = e1000_driver_name, .id_table = e1000_pci_tbl, .probe = e1000_probe, .remove = __devexit_p(e1000_remove), /* Power Managment Hooks */ #ifdef CONFIG_PM .suspend = e1000_suspend, .resume = e1000_resume #endif }; MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>"); MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver"); MODULE_LICENSE("GPL"); /** * e1000_init_module - Driver Registration Routine * * e1000_init_module is the first routine called when the driver is * loaded. All it does is register with the PCI subsystem. **/ static int __init e1000_init_module(void) { int ret; printk(KERN_INFO "%s - version %s\n", e1000_driver_string, e1000_driver_version); printk(KERN_INFO "%s\n", e1000_copyright); ret = pci_module_init(&e1000_driver); if(ret >= 0) { register_reboot_notifier(&e1000_notifier_reboot); } return ret; } module_init(e1000_init_module); /** * e1000_exit_module - Driver Exit Cleanup Routine * * e1000_exit_module is called just before the driver is removed * from memory. **/ static void __exit e1000_exit_module(void) { unregister_reboot_notifier(&e1000_notifier_reboot); pci_unregister_driver(&e1000_driver); } module_exit(e1000_exit_module); int e1000_up(struct e1000_adapter *adapter) { struct net_device *netdev = adapter->netdev; int err; /* hardware has been reset, we need to reload some things */ e1000_set_multi(netdev); e1000_restore_vlan(adapter); e1000_configure_tx(adapter); e1000_setup_rctl(adapter); e1000_configure_rx(adapter); e1000_alloc_rx_buffers(adapter); if((err = request_irq(adapter->pdev->irq, &e1000_intr, SA_SHIRQ | SA_SAMPLE_RANDOM, netdev->name, netdev))) return err; mod_timer(&adapter->watchdog_timer, jiffies); e1000_irq_enable(adapter); return 0; } void e1000_down(struct e1000_adapter *adapter) { struct net_device *netdev = adapter->netdev; e1000_irq_disable(adapter); free_irq(adapter->pdev->irq, netdev); del_timer_sync(&adapter->tx_fifo_stall_timer); del_timer_sync(&adapter->watchdog_timer); del_timer_sync(&adapter->phy_info_timer); adapter->link_speed = 0; adapter->link_duplex = 0; netif_carrier_off(netdev); netif_stop_queue(netdev); e1000_reset(adapter); e1000_clean_tx_ring(adapter); e1000_clean_rx_ring(adapter); } void e1000_reset(struct e1000_adapter *adapter) { uint32_t pba; /* Repartition Pba for greater than 9k mtu * To take effect CTRL.RST is required. */ if(adapter->hw.mac_type < e1000_82547) { if(adapter->rx_buffer_len > E1000_RXBUFFER_8192) pba = E1000_PBA_40K; else pba = E1000_PBA_48K; } else { if(adapter->rx_buffer_len > E1000_RXBUFFER_8192) pba = E1000_PBA_22K; else pba = E1000_PBA_30K; adapter->tx_fifo_head = 0; adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT; adapter->tx_fifo_size = (E1000_PBA_40K - pba) << E1000_TX_FIFO_SIZE_SHIFT; atomic_set(&adapter->tx_fifo_stall, 0); } E1000_WRITE_REG(&adapter->hw, PBA, pba); /* flow control settings */ adapter->hw.fc_high_water = pba - E1000_FC_HIGH_DIFF; adapter->hw.fc_low_water = pba - E1000_FC_LOW_DIFF; adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME; adapter->hw.fc_send_xon = 1; adapter->hw.fc = adapter->hw.original_fc; e1000_reset_hw(&adapter->hw); if(adapter->hw.mac_type >= e1000_82544) E1000_WRITE_REG(&adapter->hw, WUC, 0); e1000_init_hw(&adapter->hw); /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */ E1000_WRITE_REG(&adapter->hw, VET, ETHERNET_IEEE_VLAN_TYPE); e1000_reset_adaptive(&adapter->hw); e1000_phy_get_info(&adapter->hw, &adapter->phy_info); } /** * e1000_probe - Device Initialization Routine * @pdev: PCI device information struct * @ent: entry in e1000_pci_tbl * * Returns 0 on success, negative on failure * * e1000_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 e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { struct net_device *netdev; struct e1000_adapter *adapter; static int cards_found = 0; unsigned long mmio_start; int mmio_len; int pci_using_dac; int i; int err; uint16_t eeprom_data; if((err = pci_enable_device(pdev))) return err; if(!(err = pci_set_dma_mask(pdev, PCI_DMA_64BIT))) { pci_using_dac = 1; } else { if((err = pci_set_dma_mask(pdev, PCI_DMA_32BIT))) { E1000_ERR("No usable DMA configuration, aborting\n"); return err; } pci_using_dac = 0; } if((err = pci_request_regions(pdev, e1000_driver_name))) return err; pci_set_master(pdev); netdev = alloc_etherdev(sizeof(struct e1000_adapter)); if(!netdev) { err = -ENOMEM; goto err_alloc_etherdev; } SET_MODULE_OWNER(netdev); 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 = &e1000_open; netdev->stop = &e1000_close; netdev->hard_start_xmit = &e1000_xmit_frame; netdev->get_stats = &e1000_get_stats; netdev->set_multicast_list = &e1000_set_multi; netdev->set_mac_address = &e1000_set_mac; netdev->change_mtu = &e1000_change_mtu; netdev->do_ioctl = &e1000_ioctl; netdev->tx_timeout = &e1000_tx_timeout; netdev->watchdog_timeo = 5 * HZ; #ifdef CONFIG_E1000_NAPI netdev->poll = &e1000_clean; netdev->weight = 64; #endif netdev->vlan_rx_register = e1000_vlan_rx_register; netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid; netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid; #ifdef CONFIG_NET_POLL_CONTROLLER netdev->poll_controller = e1000_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; /* setup the private structure */ if((err = e1000_sw_init(adapter))) goto err_sw_init; if(adapter->hw.mac_type >= e1000_82543) { netdev->features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER; } else { netdev->features = NETIF_F_SG; } #ifdef NETIF_F_TSO if((adapter->hw.mac_type >= e1000_82544) && (adapter->hw.mac_type != e1000_82547)) netdev->features |= NETIF_F_TSO; #endif if(pci_using_dac) netdev->features |= NETIF_F_HIGHDMA; /* before reading the EEPROM, reset the controller to * put the device in a known good starting state */ e1000_reset_hw(&adapter->hw); /* make sure the EEPROM is good */ if(e1000_validate_eeprom_checksum(&adapter->hw) < 0) { printk(KERN_ERR "The EEPROM Checksum Is Not Valid\n"); err = -EIO; goto err_eeprom; } /* copy the MAC address out of the EEPROM */ e1000_read_mac_addr(&adapter->hw); memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len); if(!is_valid_ether_addr(netdev->dev_addr)) { err = -EIO; goto err_eeprom; } e1000_read_part_num(&adapter->hw, &(adapter->part_num)); e1000_get_bus_info(&adapter->hw); init_timer(&adapter->tx_fifo_stall_timer); adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall; adapter->tx_fifo_stall_timer.data = (unsigned long) adapter; init_timer(&adapter->watchdog_timer); adapter->watchdog_timer.function = &e1000_watchdog; adapter->watchdog_timer.data = (unsigned long) adapter; init_timer(&adapter->phy_info_timer); adapter->phy_info_timer.function = &e1000_update_phy_info; adapter->phy_info_timer.data = (unsigned long) adapter; INIT_TQUEUE(&adapter->tx_timeout_task, (void (*)(void *))e1000_tx_timeout_task, netdev); register_netdev(netdev); /* 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/1000 Network Connection\n", netdev->name); e1000_check_options(adapter); /* Initial Wake on LAN setting * If APM wake is enabled in the EEPROM, * enable the ACPI Magic Packet filter */ switch(adapter->hw.mac_type) { case e1000_82542_rev2_0: case e1000_82542_rev2_1: case e1000_82543: break; case e1000_82546: case e1000_82546_rev_3: if((E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1) && (adapter->hw.media_type == e1000_media_type_copper)) { e1000_read_eeprom(&adapter->hw, EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data); break; } /* Fall Through */ default: e1000_read_eeprom(&adapter->hw, EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data); break; } if(eeprom_data & E1000_EEPROM_APME) adapter->wol |= E1000_WUFC_MAG; /* reset the hardware with the new settings */ e1000_reset(adapter); cards_found++; return 0; err_sw_init: err_eeprom: iounmap(adapter->hw.hw_addr); err_ioremap: free_netdev(netdev); err_alloc_etherdev: pci_release_regions(pdev); return err; } /** * e1000_remove - Device Removal Routine * @pdev: PCI device information struct * * e1000_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 e1000_remove(struct pci_dev *pdev) { struct net_device *netdev = pci_get_drvdata(pdev); struct e1000_adapter *adapter = netdev->priv; uint32_t manc; if(adapter->hw.mac_type >= e1000_82540 && adapter->hw.media_type == e1000_media_type_copper) { manc = E1000_READ_REG(&adapter->hw, MANC); if(manc & E1000_MANC_SMBUS_EN) { manc |= E1000_MANC_ARP_EN; E1000_WRITE_REG(&adapter->hw, MANC, manc); } } unregister_netdev(netdev); e1000_phy_hw_reset(&adapter->hw); iounmap(adapter->hw.hw_addr); pci_release_regions(pdev); free_netdev(netdev); } /** * e1000_sw_init - Initialize general software structures (struct e1000_adapter) * @adapter: board private structure to initialize * * e1000_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 e1000_sw_init(struct e1000_adapter *adapter) { struct e1000_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; pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id); pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word); adapter->rx_buffer_len = E1000_RXBUFFER_2048; hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE; hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE; /* identify the MAC */ if (e1000_set_mac_type(hw)) { E1000_ERR("Unknown MAC Type\n"); return -EIO; } /* initialize eeprom parameters */ e1000_init_eeprom_params(hw); if((hw->mac_type == e1000_82541) || (hw->mac_type == e1000_82547) || (hw->mac_type == e1000_82541_rev_2) || (hw->mac_type == e1000_82547_rev_2)) hw->phy_init_script = 1; e1000_set_media_type(hw); if(hw->mac_type < e1000_82543) hw->report_tx_early = 0; else hw->report_tx_early = 1; hw->wait_autoneg_complete = FALSE; hw->tbi_compatibility_en = TRUE; hw->adaptive_ifs = TRUE; /* Copper options */ if(hw->media_type == e1000_media_type_copper) { hw->mdix = AUTO_ALL_MODES; hw->disable_polarity_correction = FALSE; hw->master_slave = E1000_MASTER_SLAVE; } atomic_set(&adapter->irq_sem, 1); spin_lock_init(&adapter->stats_lock); spin_lock_init(&adapter->tx_lock); return 0; } /** * e1000_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 e1000_open(struct net_device *netdev) { struct e1000_adapter *adapter = netdev->priv; int err; /* allocate transmit descriptors */ if((err = e1000_setup_tx_resources(adapter))) goto err_setup_tx; /* allocate receive descriptors */ if((err = e1000_setup_rx_resources(adapter))) goto err_setup_rx; if((err = e1000_up(adapter))) goto err_up; return 0; err_up: e1000_free_rx_resources(adapter); err_setup_rx: e1000_free_tx_resources(adapter); err_setup_tx: e1000_reset(adapter); return err; } /** * e1000_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 e1000_close(struct net_device *netdev) { struct e1000_adapter *adapter = netdev->priv; e1000_down(adapter); e1000_free_tx_resources(adapter); e1000_free_rx_resources(adapter); return 0; } /** * e1000_setup_tx_resources - allocate Tx resources (Descriptors) * @adapter: board private structure * * Return 0 on success, negative on failure **/ int e1000_setup_tx_resources(struct e1000_adapter *adapter) { struct e1000_desc_ring *txdr = &adapter->tx_ring; struct pci_dev *pdev = adapter->pdev; int size; size = sizeof(struct e1000_buffer) * txdr->count; txdr->buffer_info = kmalloc(size, GFP_KERNEL); if(!txdr->buffer_info) { return -ENOMEM; } memset(txdr->buffer_info, 0, size); /* round up to nearest 4K */ txdr->size = txdr->count * sizeof(struct e1000_tx_desc); E1000_ROUNDUP(txdr->size, 4096); txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma); if(!txdr->desc) { kfree(txdr->buffer_info); return -ENOMEM; } memset(txdr->desc, 0, txdr->size); txdr->next_to_use = 0; txdr->next_to_clean = 0; return 0; } /** * e1000_configure_tx - Configure 8254x Transmit Unit after Reset * @adapter: board private structure * * Configure the Tx unit of the MAC after a reset. **/ static void e1000_configure_tx(struct e1000_adapter *adapter) { uint64_t tdba = adapter->tx_ring.dma; uint32_t tdlen = adapter->tx_ring.count * sizeof(struct e1000_tx_desc); uint32_t tctl, tipg; E1000_WRITE_REG(&adapter->hw, TDBAL, (tdba & 0x00000000ffffffffULL)); E1000_WRITE_REG(&adapter->hw, TDBAH, (tdba >> 32)); E1000_WRITE_REG(&adapter->hw, TDLEN, tdlen); /* Setup the HW Tx Head and Tail descriptor pointers */ E1000_WRITE_REG(&adapter->hw, TDH, 0); E1000_WRITE_REG(&adapter->hw, TDT, 0); /* Set the default values for the Tx Inter Packet Gap timer */ switch (adapter->hw.mac_type) { case e1000_82542_rev2_0: case e1000_82542_rev2_1: tipg = DEFAULT_82542_TIPG_IPGT; tipg |= DEFAULT_82542_TIPG_IPGR1 << E1000_TIPG_IPGR1_SHIFT; tipg |= DEFAULT_82542_TIPG_IPGR2 << E1000_TIPG_IPGR2_SHIFT; break; default: if(adapter->hw.media_type == e1000_media_type_fiber || adapter->hw.media_type == e1000_media_type_internal_serdes) tipg = DEFAULT_82543_TIPG_IPGT_FIBER; else tipg = DEFAULT_82543_TIPG_IPGT_COPPER; tipg |= DEFAULT_82543_TIPG_IPGR1 << E1000_TIPG_IPGR1_SHIFT; tipg |= DEFAULT_82543_TIPG_IPGR2 << E1000_TIPG_IPGR2_SHIFT; } E1000_WRITE_REG(&adapter->hw, TIPG, tipg); /* Set the Tx Interrupt Delay register */ E1000_WRITE_REG(&adapter->hw, TIDV, adapter->tx_int_delay); if(adapter->hw.mac_type >= e1000_82540) E1000_WRITE_REG(&adapter->hw, TADV, adapter->tx_abs_int_delay); /* Program the Transmit Control Register */ tctl = E1000_READ_REG(&adapter->hw, TCTL); tctl &= ~E1000_TCTL_CT; tctl |= E1000_TCTL_EN | E1000_TCTL_PSP | (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT); E1000_WRITE_REG(&adapter->hw, TCTL, tctl); e1000_config_collision_dist(&adapter->hw); /* Setup Transmit Descriptor Settings for eop descriptor */ adapter->txd_cmd = E1000_TXD_CMD_IDE | E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS; if(adapter->hw.report_tx_early == 1) adapter->txd_cmd |= E1000_TXD_CMD_RS; else adapter->txd_cmd |= E1000_TXD_CMD_RPS; /* Cache if we're 82544 running in PCI-X because we'll * need this to apply a workaround later in the send path. */ if(adapter->hw.mac_type == e1000_82544 && adapter->hw.bus_type == e1000_bus_type_pcix) adapter->pcix_82544 = 1; } /** * e1000_setup_rx_resources - allocate Rx resources (Descriptors) * @adapter: board private structure * * Returns 0 on success, negative on failure **/ int e1000_setup_rx_resources(struct e1000_adapter *adapter) { struct e1000_desc_ring *rxdr = &adapter->rx_ring; struct pci_dev *pdev = adapter->pdev; int size; size = sizeof(struct e1000_buffer) * rxdr->count; rxdr->buffer_info = kmalloc(size, GFP_KERNEL); if(!rxdr->buffer_info) { return -ENOMEM; } memset(rxdr->buffer_info, 0, size); /* Round up to nearest 4K */ rxdr->size = rxdr->count * sizeof(struct e1000_rx_desc); E1000_ROUNDUP(rxdr->size, 4096); rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma); if(!rxdr->desc) { kfree(rxdr->buffer_info); return -ENOMEM; } memset(rxdr->desc, 0, rxdr->size); rxdr->next_to_clean = 0; rxdr->next_to_use = 0; return 0; } /** * e1000_setup_rctl - configure the receive control register * @adapter: Board private structure **/ static void e1000_setup_rctl(struct e1000_adapter *adapter) { uint32_t rctl; rctl = E1000_READ_REG(&adapter->hw, RCTL); rctl &= ~(3 << E1000_RCTL_MO_SHIFT); rctl |= E1000_RCTL_EN | E1000_RCTL_BAM | E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF | (adapter->hw.mc_filter_type << E1000_RCTL_MO_SHIFT); if(adapter->hw.tbi_compatibility_on == 1) rctl |= E1000_RCTL_SBP; else rctl &= ~E1000_RCTL_SBP; rctl &= ~(E1000_RCTL_SZ_4096); switch (adapter->rx_buffer_len) { case E1000_RXBUFFER_2048: default: rctl |= E1000_RCTL_SZ_2048; rctl &= ~(E1000_RCTL_BSEX | E1000_RCTL_LPE); break; case E1000_RXBUFFER_4096: rctl |= E1000_RCTL_SZ_4096 | E1000_RCTL_BSEX | E1000_RCTL_LPE; break; case E1000_RXBUFFER_8192: rctl |= E1000_RCTL_SZ_8192 | E1000_RCTL_BSEX | E1000_RCTL_LPE; break; case E1000_RXBUFFER_16384: rctl |= E1000_RCTL_SZ_16384 | E1000_RCTL_BSEX | E1000_RCTL_LPE; break; } E1000_WRITE_REG(&adapter->hw, RCTL, rctl); } /** * e1000_configure_rx - Configure 8254x Receive Unit after Reset * @adapter: board private structure * * Configure the Rx unit of the MAC after a reset. **/ static void e1000_configure_rx(struct e1000_adapter *adapter) { uint64_t rdba = adapter->rx_ring.dma; uint32_t rdlen = adapter->rx_ring.count * sizeof(struct e1000_rx_desc); uint32_t rctl; uint32_t rxcsum; /* make sure receives are disabled while setting up the descriptors */ rctl = E1000_READ_REG(&adapter->hw, RCTL); E1000_WRITE_REG(&adapter->hw, RCTL, rctl & ~E1000_RCTL_EN); /* set the Receive Delay Timer Register */ E1000_WRITE_REG(&adapter->hw, RDTR, adapter->rx_int_delay); if(adapter->hw.mac_type >= e1000_82540) { E1000_WRITE_REG(&adapter->hw, RADV, adapter->rx_abs_int_delay); if(adapter->itr > 1) E1000_WRITE_REG(&adapter->hw, ITR, 1000000000 / (adapter->itr * 256)); } /* Setup the Base and Length of the Rx Descriptor Ring */ E1000_WRITE_REG(&adapter->hw, RDBAL, (rdba & 0x00000000ffffffffULL)); E1000_WRITE_REG(&adapter->hw, RDBAH, (rdba >> 32)); E1000_WRITE_REG(&adapter->hw, RDLEN, rdlen); /* Setup the HW Rx Head and Tail Descriptor Pointers */ E1000_WRITE_REG(&adapter->hw, RDH, 0); E1000_WRITE_REG(&adapter->hw, RDT, 0); /* Enable 82543 Receive Checksum Offload for TCP and UDP */ if((adapter->hw.mac_type >= e1000_82543) && (adapter->rx_csum == TRUE)) { rxcsum = E1000_READ_REG(&adapter->hw, RXCSUM); rxcsum |= E1000_RXCSUM_TUOFL; E1000_WRITE_REG(&adapter->hw, RXCSUM, rxcsum); } /* Enable Receives */ E1000_WRITE_REG(&adapter->hw, RCTL, rctl); } /** * e1000_free_tx_resources - Free Tx Resources * @adapter: board private structure * * Free all transmit software resources **/ void e1000_free_tx_resources(struct e1000_adapter *adapter) { struct pci_dev *pdev = adapter->pdev; e1000_clean_tx_ring(adapter); kfree(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; } /** * e1000_clean_tx_ring - Free Tx Buffers * @adapter: board private structure **/ static void e1000_clean_tx_ring(struct e1000_adapter *adapter) { struct e1000_desc_ring *tx_ring = &adapter->tx_ring; struct e1000_buffer *buffer_info; struct pci_dev *pdev = adapter->pdev; 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]; if(buffer_info->skb) { pci_unmap_page(pdev, buffer_info->dma, buffer_info->length, PCI_DMA_TODEVICE); dev_kfree_skb(buffer_info->skb); buffer_info->skb = NULL; } } size = sizeof(struct e1000_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; E1000_WRITE_REG(&adapter->hw, TDH, 0); E1000_WRITE_REG(&adapter->hw, TDT, 0); } /** * e1000_free_rx_resources - Free Rx Resources * @adapter: board private structure * * Free all receive software resources **/ void e1000_free_rx_resources(struct e1000_adapter *adapter) { struct e1000_desc_ring *rx_ring = &adapter->rx_ring; struct pci_dev *pdev = adapter->pdev; e1000_clean_rx_ring(adapter); kfree(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; } /** * e1000_clean_rx_ring - Free Rx Buffers * @adapter: board private structure **/ static void e1000_clean_rx_ring(struct e1000_adapter *adapter) { struct e1000_desc_ring *rx_ring = &adapter->rx_ring; struct e1000_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 e1000_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; E1000_WRITE_REG(&adapter->hw, RDH, 0); E1000_WRITE_REG(&adapter->hw, RDT, 0); } /* The 82542 2.0 (revision 2) needs to have the receive unit in reset * and memory write and invalidate disabled for certain operations */ static void e1000_enter_82542_rst(struct e1000_adapter *adapter) { struct net_device *netdev = adapter->netdev; uint32_t rctl; e1000_pci_clear_mwi(&adapter->hw); rctl = E1000_READ_REG(&adapter->hw, RCTL); rctl |= E1000_RCTL_RST; E1000_WRITE_REG(&adapter->hw, RCTL, rctl); E1000_WRITE_FLUSH(&adapter->hw); mdelay(5); if(netif_running(netdev)) e1000_clean_rx_ring(adapter); } static void e1000_leave_82542_rst(struct e1000_adapter *adapter) { struct net_device *netdev = adapter->netdev; uint32_t rctl; rctl = E1000_READ_REG(&adapter->hw, RCTL); rctl &= ~E1000_RCTL_RST; E1000_WRITE_REG(&adapter->hw, RCTL, rctl); E1000_WRITE_FLUSH(&adapter->hw); mdelay(5); if(adapter->hw.pci_cmd_word & PCI_COMMAND_INVALIDATE) e1000_pci_set_mwi(&adapter->hw); if(netif_running(netdev)) { e1000_configure_rx(adapter); e1000_alloc_rx_buffers(adapter); } } /** * e1000_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 e1000_set_mac(struct net_device *netdev, void *p) { struct e1000_adapter *adapter = netdev->priv; struct sockaddr *addr = p; if(!is_valid_ether_addr(addr->sa_data)) return -EADDRNOTAVAIL; /* 82542 2.0 needs to be in reset to write receive address registers */ if(adapter->hw.mac_type == e1000_82542_rev2_0) e1000_enter_82542_rst(adapter); memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len); e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0); if(adapter->hw.mac_type == e1000_82542_rev2_0) e1000_leave_82542_rst(adapter); return 0; } /** * e1000_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 e1000_set_multi(struct net_device *netdev) { struct e1000_adapter *adapter = netdev->priv; struct e1000_hw *hw = &adapter->hw; struct dev_mc_list *mc_ptr; uint32_t rctl; uint32_t hash_value; int i; /* Check for Promiscuous and All Multicast modes */ rctl = E1000_READ_REG(hw, RCTL); if(netdev->flags & IFF_PROMISC) { rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE); } else if(netdev->flags & IFF_ALLMULTI) { rctl |= E1000_RCTL_MPE; rctl &= ~E1000_RCTL_UPE; } else { rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE); } E1000_WRITE_REG(hw, RCTL, rctl); /* 82542 2.0 needs to be in reset to write receive address registers */ if(hw->mac_type == e1000_82542_rev2_0) e1000_enter_82542_rst(adapter); /* load the first 14 multicast address into the exact filters 1-14 * RAR 0 is used for the station MAC adddress * if there are not 14 addresses, go ahead and clear the filters */ mc_ptr = netdev->mc_list; for(i = 1; i < E1000_RAR_ENTRIES; i++) { if(mc_ptr) { e1000_rar_set(hw, mc_ptr->dmi_addr, i); mc_ptr = mc_ptr->next; } else { E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0); E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0); } } /* clear the old settings from the multicast hash table */ for(i = 0; i < E1000_NUM_MTA_REGISTERS; i++) E1000_WRITE_REG_ARRAY(hw, MTA, i, 0); /* load any remaining addresses into the hash table */ for(; mc_ptr; mc_ptr = mc_ptr->next) { hash_value = e1000_hash_mc_addr(hw, mc_ptr->dmi_addr); e1000_mta_set(hw, hash_value); } if(hw->mac_type == e1000_82542_rev2_0) e1000_leave_82542_rst(adapter); } /* need to wait a few seconds after link up to get diagnostic information from the phy */ static void e1000_update_phy_info(unsigned long data) { struct e1000_adapter *adapter = (struct e1000_adapter *) data; e1000_phy_get_info(&adapter->hw, &adapter->phy_info); } /** * e1000_82547_tx_fifo_stall - Timer Call-back * @data: pointer to adapter cast into an unsigned long **/ static void e1000_82547_tx_fifo_stall(unsigned long data) { struct e1000_adapter *adapter = (struct e1000_adapter *) data; struct net_device *netdev = adapter->netdev; uint32_t tctl; if(atomic_read(&adapter->tx_fifo_stall)) { if((E1000_READ_REG(&adapter->hw, TDT) == E1000_READ_REG(&adapter->hw, TDH)) && (E1000_READ_REG(&adapter->hw, TDFT) == E1000_READ_REG(&adapter->hw, TDFH)) && (E1000_READ_REG(&adapter->hw, TDFTS) == E1000_READ_REG(&adapter->hw, TDFHS))) { tctl = E1000_READ_REG(&adapter->hw, TCTL); E1000_WRITE_REG(&adapter->hw, TCTL, tctl & ~E1000_TCTL_EN); E1000_WRITE_REG(&adapter->hw, TDFT, adapter->tx_head_addr); E1000_WRITE_REG(&adapter->hw, TDFH, adapter->tx_head_addr); E1000_WRITE_REG(&adapter->hw, TDFTS, adapter->tx_head_addr); E1000_WRITE_REG(&adapter->hw, TDFHS, adapter->tx_head_addr); E1000_WRITE_REG(&adapter->hw, TCTL, tctl); E1000_WRITE_FLUSH(&adapter->hw); adapter->tx_fifo_head = 0; atomic_set(&adapter->tx_fifo_stall, 0); netif_wake_queue(netdev); } else { mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1); } } } /** * e1000_watchdog - Timer Call-back * @data: pointer to netdev cast into an unsigned long **/ static void e1000_watchdog(unsigned long data) { struct e1000_adapter *adapter = (struct e1000_adapter *) data; struct net_device *netdev = adapter->netdev; struct e1000_desc_ring *txdr = &adapter->tx_ring; unsigned int i; uint32_t link; e1000_check_for_link(&adapter->hw); if((adapter->hw.media_type == e1000_media_type_internal_serdes) && !(E1000_READ_REG(&adapter->hw, TXCW) & E1000_TXCW_ANE)) link = !adapter->hw.serdes_link_down; else link = E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU; if(link) { if(!netif_carrier_ok(netdev)) { e1000_get_speed_and_duplex(&adapter->hw, &adapter->link_speed, &adapter->link_duplex); printk(KERN_INFO "e1000: %s NIC Link is Up %d Mbps %s\n", netdev->name, adapter->link_speed, adapter->link_duplex == FULL_DUPLEX ? "Full Duplex" : "Half Duplex"); netif_carrier_on(netdev); netif_wake_queue(netdev); mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ); adapter->smartspeed = 0; } } else { if(netif_carrier_ok(netdev)) { adapter->link_speed = 0; adapter->link_duplex = 0; printk(KERN_INFO "e1000: %s NIC Link is Down\n", netdev->name); netif_carrier_off(netdev); netif_stop_queue(netdev); mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ); } e1000_smartspeed(adapter); } e1000_update_stats(adapter); adapter->hw.tx_packet_delta = adapter->stats.tpt - adapter->tpt_old; adapter->tpt_old = adapter->stats.tpt; adapter->hw.collision_delta = adapter->stats.colc - adapter->colc_old; adapter->colc_old = adapter->stats.colc; adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old; adapter->gorcl_old = adapter->stats.gorcl; adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old; adapter->gotcl_old = adapter->stats.gotcl; e1000_update_adaptive(&adapter->hw); if(!netif_carrier_ok(netdev)) { if(E1000_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_task(&adapter->tx_timeout_task); } } /* Dynamic mode for Interrupt Throttle Rate (ITR) */ if(adapter->hw.mac_type >= e1000_82540 && adapter->itr == 1) { /* Symmetric Tx/Rx gets a reduced ITR=2000; Total * asymmetrical Tx or Rx gets ITR=8000; everyone * else is between 2000-8000. */ uint32_t goc = (adapter->gotcl + adapter->gorcl) / 10000; uint32_t dif = (adapter->gotcl > adapter->gorcl ? adapter->gotcl - adapter->gorcl : adapter->gorcl - adapter->gotcl) / 10000; uint32_t itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000; E1000_WRITE_REG(&adapter->hw, ITR, 1000000000 / (itr * 256)); } /* Cause software interrupt to ensure rx ring is cleaned */ E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_RXDMT0); /* Early detection of hung controller */ i = txdr->next_to_clean; if(txdr->buffer_info[i].dma && time_after(jiffies, txdr->buffer_info[i].time_stamp + HZ) && !(E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_TXOFF)) netif_stop_queue(netdev); /* Reset the timer */ mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ); } #define E1000_TX_FLAGS_CSUM 0x00000001 #define E1000_TX_FLAGS_VLAN 0x00000002 #define E1000_TX_FLAGS_TSO 0x00000004 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000 #define E1000_TX_FLAGS_VLAN_SHIFT 16 static inline boolean_t e1000_tso(struct e1000_adapter *adapter, struct sk_buff *skb) { #ifdef NETIF_F_TSO struct e1000_context_desc *context_desc; unsigned int i; uint8_t ipcss, ipcso, tucss, tucso, hdr_len; uint16_t ipcse, tucse, mss; if(skb_shinfo(skb)->tso_size) { 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 = E1000_CONTEXT_DESC(adapter->tx_ring, i); context_desc->lower_setup.ip_fields.ipcss = ipcss; context_desc->lower_setup.ip_fields.ipcso = ipcso; context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse); context_desc->upper_setup.tcp_fields.tucss = tucss; context_desc->upper_setup.tcp_fields.tucso = tucso; context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse); context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss); context_desc->tcp_seg_setup.fields.hdr_len = hdr_len; context_desc->cmd_and_length = cpu_to_le32( E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE | E1000_TXD_CMD_IP | E1000_TXD_CMD_TCP | (skb->len - (hdr_len))); if(++i == adapter->tx_ring.count) i = 0; adapter->tx_ring.next_to_use = i; return TRUE; } #endif return FALSE; } static inline boolean_t e1000_tx_csum(struct e1000_adapter *adapter, struct sk_buff *skb) { struct e1000_context_desc *context_desc; unsigned int i; uint8_t css, cso; if(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 = E1000_CONTEXT_DESC(adapter->tx_ring, i); context_desc->upper_setup.tcp_fields.tucss = css; context_desc->upper_setup.tcp_fields.tucso = cso; context_desc->upper_setup.tcp_fields.tucse = 0; context_desc->tcp_seg_setup.data = 0; context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT); if(++i == adapter->tx_ring.count) i = 0; adapter->tx_ring.next_to_use = i; return TRUE; } return FALSE; } #define E1000_MAX_TXD_PWR 12 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR) static inline int e1000_tx_map(struct e1000_adapter *adapter, struct sk_buff *skb, unsigned int first) { struct e1000_desc_ring *tx_ring = &adapter->tx_ring; struct e1000_tx_desc *tx_desc; struct e1000_buffer *buffer_info; unsigned int len = skb->len, max_per_txd = E1000_MAX_DATA_PER_TXD; unsigned int offset = 0, size, count = 0, i; #ifdef NETIF_F_TSO unsigned int mss; #endif unsigned int nr_frags; unsigned int f; #ifdef NETIF_F_TSO mss = skb_shinfo(skb)->tso_size; /* The controller does a simple calculation to * make sure there is enough room in the FIFO before * initiating the DMA for each buffer. The calc is: * 4 = ceil(buffer len/mss). To make sure we don't * overrun the FIFO, adjust the max buffer len if mss * drops. */ if(mss) max_per_txd = min(mss << 2, max_per_txd); #endif nr_frags = skb_shinfo(skb)->nr_frags; len -= skb->data_len; i = tx_ring->next_to_use; while(len) { buffer_info = &tx_ring->buffer_info[i]; size = min(len, max_per_txd); #ifdef NETIF_F_TSO /* Workaround for premature desc write-backs * in TSO mode. Append 4-byte sentinel desc */ if(mss && !nr_frags && size == len && size > 8) size -= 4; #endif /* Workaround for potential 82544 hang in PCI-X. Avoid * terminating buffers within evenly-aligned dwords. */ if(adapter->pcix_82544 && !((unsigned long)(skb->data + offset + size - 1) & 4) && size > 4) size -= 4; 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 = frag->page_offset; while(len) { buffer_info = &tx_ring->buffer_info[i]; size = min(len, max_per_txd); #ifdef NETIF_F_TSO /* Workaround for premature desc write-backs * in TSO mode. Append 4-byte sentinel desc */ if(mss && f == (nr_frags-1) && size == len && size > 8) size -= 4; #endif /* Workaround for potential 82544 hang in PCI-X. * Avoid terminating buffers within evenly-aligned * dwords. */ if(adapter->pcix_82544 && !((unsigned long)(frag->page+offset+size-1) & 4) && size > 4) size -= 4; buffer_info->length = size; buffer_info->dma = pci_map_page(adapter->pdev, frag->page, offset, size, PCI_DMA_TODEVICE); buffer_info->time_stamp = jiffies; len -= size; offset += size; count++; if(++i == tx_ring->count) i = 0; } } if(E1000_DESC_UNUSED(&adapter->tx_ring) < count + 2) { /* There aren't enough descriptors available to queue up * this send (need: count + 1 context desc + 1 desc gap * to keep tail from touching head), so undo the mapping * and abort the send. We could have done the check before * we mapped the skb, but because of all the workarounds * (above), it's too difficult to predict how many we're * going to need.*/ i = adapter->tx_ring.next_to_use; if(i == first) { /* Cleanup after e1000_tx_[csum|tso] scribbling * on descriptors. */ tx_desc = E1000_TX_DESC(*tx_ring, first); tx_desc->buffer_addr = 0; tx_desc->lower.data = 0; tx_desc->upper.data = 0; } while(count--) { buffer_info = &tx_ring->buffer_info[i]; if(buffer_info->dma) { pci_unmap_page(adapter->pdev, buffer_info->dma, buffer_info->length, PCI_DMA_TODEVICE); buffer_info->dma = 0; } if(++i == tx_ring->count) i = 0; } adapter->tx_ring.next_to_use = first; return 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 e1000_tx_queue(struct e1000_adapter *adapter, int count, int tx_flags) { struct e1000_desc_ring *tx_ring = &adapter->tx_ring; struct e1000_tx_desc *tx_desc = NULL; struct e1000_buffer *buffer_info; uint32_t txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS; unsigned int i; if(tx_flags & E1000_TX_FLAGS_TSO) { txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D | E1000_TXD_CMD_TSE; txd_upper |= (E1000_TXD_POPTS_IXSM | E1000_TXD_POPTS_TXSM) << 8; } if(tx_flags & E1000_TX_FLAGS_CSUM) { txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D; txd_upper |= E1000_TXD_POPTS_TXSM << 8; } if(tx_flags & E1000_TX_FLAGS_VLAN) { txd_lower |= E1000_TXD_CMD_VLE; txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK); } i = tx_ring->next_to_use; while(count--) { buffer_info = &tx_ring->buffer_info[i]; tx_desc = E1000_TX_DESC(*tx_ring, i); tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma); tx_desc->lower.data = cpu_to_le32(txd_lower | buffer_info->length); tx_desc->upper.data = cpu_to_le32(txd_upper); if(++i == tx_ring->count) i = 0; } tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd); /* 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; E1000_WRITE_REG(&adapter->hw, TDT, i); } /** * 82547 workaround to avoid controller hang in half-duplex environment. * The workaround is to avoid queuing a large packet that would span * the internal Tx FIFO ring boundary by notifying the stack to resend * the packet at a later time. This gives the Tx FIFO an opportunity to * flush all packets. When that occurs, we reset the Tx FIFO pointers * to the beginning of the Tx FIFO. **/ #define E1000_FIFO_HDR 0x10 #define E1000_82547_PAD_LEN 0x3E0 static inline int e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct sk_buff *skb) { uint32_t fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head; uint32_t skb_fifo_len = skb->len + E1000_FIFO_HDR; E1000_ROUNDUP(skb_fifo_len, E1000_FIFO_HDR); if(adapter->link_duplex != HALF_DUPLEX) goto no_fifo_stall_required; if(atomic_read(&adapter->tx_fifo_stall)) return 1; if(skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) { atomic_set(&adapter->tx_fifo_stall, 1); return 1; } no_fifo_stall_required: adapter->tx_fifo_head += skb_fifo_len; if(adapter->tx_fifo_head >= adapter->tx_fifo_size) adapter->tx_fifo_head -= adapter->tx_fifo_size; return 0; } static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev) { struct e1000_adapter *adapter = netdev->priv; unsigned int first; unsigned int tx_flags = 0; unsigned long flags; int count; if(skb->len <= 0) { dev_kfree_skb_any(skb); return 0; } spin_lock_irqsave(&adapter->tx_lock, flags); if(adapter->hw.mac_type == e1000_82547) { if(e1000_82547_fifo_workaround(adapter, skb)) { netif_stop_queue(netdev); mod_timer(&adapter->tx_fifo_stall_timer, jiffies); spin_unlock_irqrestore(&adapter->tx_lock, flags); return 1; } } if(adapter->vlgrp && vlan_tx_tag_present(skb)) { tx_flags |= E1000_TX_FLAGS_VLAN; tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT); } first = adapter->tx_ring.next_to_use; if(e1000_tso(adapter, skb)) tx_flags |= E1000_TX_FLAGS_TSO; else if(e1000_tx_csum(adapter, skb)) tx_flags |= E1000_TX_FLAGS_CSUM; if((count = e1000_tx_map(adapter, skb, first))) e1000_tx_queue(adapter, count, tx_flags); else { netif_stop_queue(netdev); spin_unlock_irqrestore(&adapter->tx_lock, flags); return 1; } netdev->trans_start = jiffies; spin_unlock_irqrestore(&adapter->tx_lock, flags); return 0; } /** * e1000_tx_timeout - Respond to a Tx Hang * @netdev: network interface device structure **/ static void e1000_tx_timeout(struct net_device *netdev) { struct e1000_adapter *adapter = netdev->priv; /* Do the reset outside of interrupt context */ schedule_task(&adapter->tx_timeout_task); } static void e1000_tx_timeout_task(struct net_device *netdev) { struct e1000_adapter *adapter = netdev->priv; netif_device_detach(netdev); e1000_down(adapter); e1000_up(adapter); netif_device_attach(netdev); } /** * e1000_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 * e1000_get_stats(struct net_device *netdev) { struct e1000_adapter *adapter = netdev->priv; e1000_update_stats(adapter); return &adapter->net_stats; } /** * e1000_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 e1000_change_mtu(struct net_device *netdev, int new_mtu) { struct e1000_adapter *adapter = netdev->priv; int old_mtu = adapter->rx_buffer_len; int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE; if((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) || (max_frame > MAX_JUMBO_FRAME_SIZE)) { E1000_ERR("Invalid MTU setting\n"); return -EINVAL; } if(max_frame <= MAXIMUM_ETHERNET_FRAME_SIZE) { adapter->rx_buffer_len = E1000_RXBUFFER_2048; } else if(adapter->hw.mac_type < e1000_82543) { E1000_ERR("Jumbo Frames not supported on 82542\n"); return -EINVAL; } else if(max_frame <= E1000_RXBUFFER_4096) { adapter->rx_buffer_len = E1000_RXBUFFER_4096; } else if(max_frame <= E1000_RXBUFFER_8192) { adapter->rx_buffer_len = E1000_RXBUFFER_8192; } else { adapter->rx_buffer_len = E1000_RXBUFFER_16384; } if(old_mtu != adapter->rx_buffer_len && netif_running(netdev)) { e1000_down(adapter); e1000_up(adapter); } netdev->mtu = new_mtu; adapter->hw.max_frame_size = max_frame; return 0; } /** * e1000_update_stats - Update the board statistics counters * @adapter: board private structure **/ void e1000_update_stats(struct e1000_adapter *adapter) { struct e1000_hw *hw = &adapter->hw; unsigned long flags; uint16_t phy_tmp; #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF spin_lock_irqsave(&adapter->stats_lock, flags); /* these counters are modified from e1000_adjust_tbi_stats, * called from the interrupt context, so they must only * be written while holding adapter->stats_lock */ adapter->stats.crcerrs += E1000_READ_REG(hw, CRCERRS); adapter->stats.gprc += E1000_READ_REG(hw, GPRC); adapter->stats.gorcl += E1000_READ_REG(hw, GORCL); adapter->stats.gorch += E1000_READ_REG(hw, GORCH); adapter->stats.bprc += E1000_READ_REG(hw, BPRC); adapter->stats.mprc += E1000_READ_REG(hw, MPRC); adapter->stats.roc += E1000_READ_REG(hw, ROC); adapter->stats.prc64 += E1000_READ_REG(hw, PRC64); adapter->stats.prc127 += E1000_READ_REG(hw, PRC127); adapter->stats.prc255 += E1000_READ_REG(hw, PRC255); adapter->stats.prc511 += E1000_READ_REG(hw, PRC511); adapter->stats.prc1023 += E1000_READ_REG(hw, PRC1023); adapter->stats.prc1522 += E1000_READ_REG(hw, PRC1522); /* the rest of the counters are only modified here */ adapter->stats.symerrs += E1000_READ_REG(hw, SYMERRS); adapter->stats.mpc += E1000_READ_REG(hw, MPC); adapter->stats.scc += E1000_READ_REG(hw, SCC); adapter->stats.ecol += E1000_READ_REG(hw, ECOL); adapter->stats.mcc += E1000_READ_REG(hw, MCC); adapter->stats.latecol += E1000_READ_REG(hw, LATECOL); adapter->stats.dc += E1000_READ_REG(hw, DC); adapter->stats.sec += E1000_READ_REG(hw, SEC); adapter->stats.rlec += E1000_READ_REG(hw, RLEC); adapter->stats.xonrxc += E1000_READ_REG(hw, XONRXC); adapter->stats.xontxc += E1000_READ_REG(hw, XONTXC); adapter->stats.xoffrxc += E1000_READ_REG(hw, XOFFRXC); adapter->stats.xofftxc += E1000_READ_REG(hw, XOFFTXC); adapter->stats.fcruc += E1000_READ_REG(hw, FCRUC); adapter->stats.gptc += E1000_READ_REG(hw, GPTC); adapter->stats.gotcl += E1000_READ_REG(hw, GOTCL); adapter->stats.gotch += E1000_READ_REG(hw, GOTCH); adapter->stats.rnbc += E1000_READ_REG(hw, RNBC); adapter->stats.ruc += E1000_READ_REG(hw, RUC); adapter->stats.rfc += E1000_READ_REG(hw, RFC); adapter->stats.rjc += E1000_READ_REG(hw, RJC); adapter->stats.torl += E1000_READ_REG(hw, TORL); adapter->stats.torh += E1000_READ_REG(hw, TORH); adapter->stats.totl += E1000_READ_REG(hw, TOTL); adapter->stats.toth += E1000_READ_REG(hw, TOTH); adapter->stats.tpr += E1000_READ_REG(hw, TPR); adapter->stats.ptc64 += E1000_READ_REG(hw, PTC64); adapter->stats.ptc127 += E1000_READ_REG(hw, PTC127); adapter->stats.ptc255 += E1000_READ_REG(hw, PTC255); adapter->stats.ptc511 += E1000_READ_REG(hw, PTC511); adapter->stats.ptc1023 += E1000_READ_REG(hw, PTC1023); adapter->stats.ptc1522 += E1000_READ_REG(hw, PTC1522); adapter->stats.mptc += E1000_READ_REG(hw, MPTC); adapter->stats.bptc += E1000_READ_REG(hw, BPTC); /* used for adaptive IFS */ hw->tx_packet_delta = E1000_READ_REG(hw, TPT); adapter->stats.tpt += hw->tx_packet_delta; hw->collision_delta = E1000_READ_REG(hw, COLC); adapter->stats.colc += hw->collision_delta; if(hw->mac_type >= e1000_82543) { adapter->stats.algnerrc += E1000_READ_REG(hw, ALGNERRC); adapter->stats.rxerrc += E1000_READ_REG(hw, RXERRC); adapter->stats.tncrs += E1000_READ_REG(hw, TNCRS); adapter->stats.cexterr += E1000_READ_REG(hw, CEXTERR); adapter->stats.tsctc += E1000_READ_REG(hw, TSCTC); adapter->stats.tsctfc += E1000_READ_REG(hw, TSCTFC); } /* Fill out the OS statistics structure */ adapter->net_stats.rx_packets = adapter->stats.gprc; adapter->net_stats.tx_packets = adapter->stats.gptc; adapter->net_stats.rx_bytes = adapter->stats.gorcl; adapter->net_stats.tx_bytes = adapter->stats.gotcl; adapter->net_stats.multicast = adapter->stats.mprc; adapter->net_stats.collisions = adapter->stats.colc; /* Rx Errors */ adapter->net_stats.rx_errors = adapter->stats.rxerrc + adapter->stats.crcerrs + adapter->stats.algnerrc + adapter->stats.rlec + adapter->stats.rnbc + adapter->stats.mpc + adapter->stats.cexterr; adapter->net_stats.rx_dropped = adapter->stats.rnbc; adapter->net_stats.rx_length_errors = adapter->stats.rlec; adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs; adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc; adapter->net_stats.rx_fifo_errors = adapter->stats.mpc; adapter->net_stats.rx_missed_errors = adapter->stats.mpc; /* Tx Errors */ adapter->net_stats.tx_errors = adapter->stats.ecol + adapter->stats.latecol; adapter->net_stats.tx_aborted_errors = adapter->stats.ecol; adapter->net_stats.tx_window_errors = adapter->stats.latecol; adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs; /* Tx Dropped needs to be maintained elsewhere */ /* Phy Stats */ if(hw->media_type == e1000_media_type_copper) { if((adapter->link_speed == SPEED_1000) && (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) { phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK; adapter->phy_stats.idle_errors += phy_tmp; } if((hw->mac_type <= e1000_82546) && (hw->phy_type == e1000_phy_m88) && !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp)) adapter->phy_stats.receive_errors += phy_tmp; } spin_unlock_irqrestore(&adapter->stats_lock, flags); } /** * e1000_irq_disable - Mask off interrupt generation on the NIC * @adapter: board private structure **/ static inline void e1000_irq_disable(struct e1000_adapter *adapter) { atomic_inc(&adapter->irq_sem); E1000_WRITE_REG(&adapter->hw, IMC, ~0); E1000_WRITE_FLUSH(&adapter->hw); synchronize_irq(); } /** * e1000_irq_enable - Enable default interrupt generation settings * @adapter: board private structure **/ static inline void e1000_irq_enable(struct e1000_adapter *adapter) { if(atomic_dec_and_test(&adapter->irq_sem)) { E1000_WRITE_REG(&adapter->hw, IMS, IMS_ENABLE_MASK); E1000_WRITE_FLUSH(&adapter->hw); } } /** * e1000_intr - Interrupt Handler * @irq: interrupt number * @data: pointer to a network interface device structure * @pt_regs: CPU registers structure **/ static irqreturn_t e1000_intr(int irq, void *data, struct pt_regs *regs) { struct net_device *netdev = data; struct e1000_adapter *adapter = netdev->priv; struct e1000_hw *hw = &adapter->hw; uint32_t icr = E1000_READ_REG(&adapter->hw, ICR); #ifndef CONFIG_E1000_NAPI unsigned int i; #endif if(!icr) return IRQ_NONE; /* Not our interrupt */ if(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) { hw->get_link_status = 1; mod_timer(&adapter->watchdog_timer, jiffies); } #ifdef CONFIG_E1000_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); E1000_WRITE_REG(hw, IMC, ~0); __netif_rx_schedule(netdev); } #else /* Writing IMC and IMS is needed for 82547. Due to Hub Link bus being occupied, an interrupt de-assertion message is not able to be sent. When an interrupt assertion message is generated later, two messages are re-ordered and sent out. That causes APIC to think 82547 is in de-assertion state, while 82547 is in assertion state, resulting in dead lock. Writing IMC forces 82547 into de-assertion state. */ if(hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2) e1000_irq_disable(adapter); for(i = 0; i < E1000_MAX_INTR; i++) if(!e1000_clean_rx_irq(adapter) & !e1000_clean_tx_irq(adapter)) break; if(hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2) e1000_irq_enable(adapter); #endif return IRQ_HANDLED; } #ifdef CONFIG_E1000_NAPI /** * e1000_clean - NAPI Rx polling callback * @adapter: board private structure **/ static int e1000_clean(struct net_device *netdev, int *budget) { struct e1000_adapter *adapter = netdev->priv; int work_to_do = min(*budget, netdev->quota); int work_done = 0; e1000_clean_tx_irq(adapter); e1000_clean_rx_irq(adapter, &work_done, work_to_do); *budget -= work_done; netdev->quota -= work_done; if(work_done < work_to_do || !netif_running(netdev)) { netif_rx_complete(netdev); e1000_irq_enable(adapter); } return (work_done >= work_to_do); } #endif /** * e1000_clean_tx_irq - Reclaim resources after transmit completes * @adapter: board private structure **/ static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter) { struct e1000_desc_ring *tx_ring = &adapter->tx_ring; struct net_device *netdev = adapter->netdev; struct pci_dev *pdev = adapter->pdev; struct e1000_tx_desc *tx_desc, *eop_desc; struct e1000_buffer *buffer_info; unsigned int i, eop; boolean_t cleaned = FALSE; spin_lock(&adapter->tx_lock); i = tx_ring->next_to_clean; eop = tx_ring->buffer_info[i].next_to_watch; eop_desc = E1000_TX_DESC(*tx_ring, eop); while(eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) { for(cleaned = FALSE; !cleaned; ) { tx_desc = E1000_TX_DESC(*tx_ring, i); buffer_info = &tx_ring->buffer_info[i]; 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; } tx_desc->buffer_addr = 0; tx_desc->lower.data = 0; tx_desc->upper.data = 0; cleaned = (i == eop); if(++i == tx_ring->count) i = 0; } eop = tx_ring->buffer_info[i].next_to_watch; eop_desc = E1000_TX_DESC(*tx_ring, eop); } tx_ring->next_to_clean = i; if(cleaned && netif_queue_stopped(netdev) && netif_carrier_ok(netdev)) netif_wake_queue(netdev); spin_unlock(&adapter->tx_lock); return cleaned; } /** * e1000_clean_rx_irq - Send received data up the network stack, * @adapter: board private structure **/ static boolean_t #ifdef CONFIG_E1000_NAPI e1000_clean_rx_irq(struct e1000_adapter *adapter, int *work_done, int work_to_do) #else e1000_clean_rx_irq(struct e1000_adapter *adapter) #endif { struct e1000_desc_ring *rx_ring = &adapter->rx_ring; struct net_device *netdev = adapter->netdev; struct pci_dev *pdev = adapter->pdev; struct e1000_rx_desc *rx_desc; struct e1000_buffer *buffer_info; struct sk_buff *skb; unsigned long flags; uint32_t length; uint8_t last_byte; unsigned int i; boolean_t cleaned = FALSE; i = rx_ring->next_to_clean; rx_desc = E1000_RX_DESC(*rx_ring, i); while(rx_desc->status & E1000_RXD_STAT_DD) { buffer_info = &rx_ring->buffer_info[i]; #ifdef CONFIG_E1000_NAPI if(*work_done >= work_to_do) break; (*work_done)++; #endif cleaned = TRUE; pci_unmap_single(pdev, buffer_info->dma, buffer_info->length, PCI_DMA_FROMDEVICE); skb = buffer_info->skb; length = le16_to_cpu(rx_desc->length); if(!(rx_desc->status & E1000_RXD_STAT_EOP)) { /* All receives must fit into a single buffer */ E1000_DBG("Receive packet consumed multiple buffers\n"); dev_kfree_skb_irq(skb); rx_desc->status = 0; buffer_info->skb = NULL; if(++i == rx_ring->count) i = 0; rx_desc = E1000_RX_DESC(*rx_ring, i); continue; } if(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK) { last_byte = *(skb->data + length - 1); if(TBI_ACCEPT(&adapter->hw, rx_desc->status, rx_desc->errors, length, last_byte)) { spin_lock_irqsave(&adapter->stats_lock, flags); e1000_tbi_adjust_stats(&adapter->hw, &adapter->stats, length, skb->data); spin_unlock_irqrestore(&adapter->stats_lock, flags); length--; } else { dev_kfree_skb_irq(skb); rx_desc->status = 0; buffer_info->skb = NULL; if(++i == rx_ring->count) i = 0; rx_desc = E1000_RX_DESC(*rx_ring, i); continue; } } /* Good Receive */ skb_put(skb, length - ETHERNET_FCS_SIZE); /* Receive Checksum Offload */ e1000_rx_checksum(adapter, rx_desc, skb); skb->protocol = eth_type_trans(skb, netdev); #ifdef CONFIG_E1000_NAPI if(adapter->vlgrp && (rx_desc->status & E1000_RXD_STAT_VP)) { vlan_hwaccel_receive_skb(skb, adapter->vlgrp, le16_to_cpu(rx_desc->special & E1000_RXD_SPC_VLAN_MASK)); } else { netif_receive_skb(skb); } #else /* CONFIG_E1000_NAPI */ if(adapter->vlgrp && (rx_desc->status & E1000_RXD_STAT_VP)) { vlan_hwaccel_rx(skb, adapter->vlgrp, le16_to_cpu(rx_desc->special & E1000_RXD_SPC_VLAN_MASK)); } else { netif_rx(skb); } #endif /* CONFIG_E1000_NAPI */ netdev->last_rx = jiffies; rx_desc->status = 0; buffer_info->skb = NULL; if(++i == rx_ring->count) i = 0; rx_desc = E1000_RX_DESC(*rx_ring, i); } rx_ring->next_to_clean = i; e1000_alloc_rx_buffers(adapter); return cleaned; } /** * e1000_alloc_rx_buffers - Replace used receive buffers * @adapter: address of board private structure **/ static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter) { struct e1000_desc_ring *rx_ring = &adapter->rx_ring; struct net_device *netdev = adapter->netdev; struct pci_dev *pdev = adapter->pdev; struct e1000_rx_desc *rx_desc; struct e1000_buffer *buffer_info; struct sk_buff *skb; int reserve_len = 2; unsigned int i; i = rx_ring->next_to_use; buffer_info = &rx_ring->buffer_info[i]; while(!buffer_info->skb) { rx_desc = E1000_RX_DESC(*rx_ring, i); skb = dev_alloc_skb(adapter->rx_buffer_len + reserve_len); if(!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, reserve_len); 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->buffer_addr = cpu_to_le64(buffer_info->dma); if((i & ~(E1000_RX_BUFFER_WRITE - 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(); E1000_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; } /** * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers. * @adapter: **/ static void e1000_smartspeed(struct e1000_adapter *adapter) { uint16_t phy_status; uint16_t phy_ctrl; if((adapter->hw.phy_type != e1000_phy_igp) || !adapter->hw.autoneg || !(adapter->hw.autoneg_advertised & ADVERTISE_1000_FULL)) return; if(adapter->smartspeed == 0) { /* If Master/Slave config fault is asserted twice, * we assume back-to-back */ e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status); if(!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return; e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status); if(!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return; e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl); if(phy_ctrl & CR_1000T_MS_ENABLE) { phy_ctrl &= ~CR_1000T_MS_ENABLE; e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL, phy_ctrl); adapter->smartspeed++; if(!e1000_phy_setup_autoneg(&adapter->hw) && !e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &phy_ctrl)) { phy_ctrl |= (MII_CR_AUTO_NEG_EN | MII_CR_RESTART_AUTO_NEG); e1000_write_phy_reg(&adapter->hw, PHY_CTRL, phy_ctrl); } } return; } else if(adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) { /* If still no link, perhaps using 2/3 pair cable */ e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl); phy_ctrl |= CR_1000T_MS_ENABLE; e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL, phy_ctrl); if(!e1000_phy_setup_autoneg(&adapter->hw) && !e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &phy_ctrl)) { phy_ctrl |= (MII_CR_AUTO_NEG_EN | MII_CR_RESTART_AUTO_NEG); e1000_write_phy_reg(&adapter->hw, PHY_CTRL, phy_ctrl); } } /* Restart process after E1000_SMARTSPEED_MAX iterations */ if(adapter->smartspeed++ == E1000_SMARTSPEED_MAX) adapter->smartspeed = 0; } /** * e1000_ioctl - * @netdev: * @ifreq: * @cmd: **/ static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) { switch (cmd) { case SIOCGMIIPHY: case SIOCGMIIREG: case SIOCSMIIREG: return e1000_mii_ioctl(netdev, ifr, cmd); case SIOCETHTOOL: return e1000_ethtool_ioctl(netdev, ifr); default: return -EOPNOTSUPP; } } /** * e1000_mii_ioctl - * @netdev: * @ifreq: * @cmd: **/ static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) { struct e1000_adapter *adapter = netdev->priv; struct mii_ioctl_data *data = (struct mii_ioctl_data *)&ifr->ifr_data; int retval; uint16_t mii_reg; uint16_t spddplx; if(adapter->hw.media_type != e1000_media_type_copper) return -EOPNOTSUPP; switch (cmd) { case SIOCGMIIPHY: data->phy_id = adapter->hw.phy_addr; break; case SIOCGMIIREG: if (!capable(CAP_NET_ADMIN)) return -EPERM; if (e1000_read_phy_reg(&adapter->hw, data->reg_num & 0x1F, &data->val_out)) return -EIO; break; case SIOCSMIIREG: if (!capable(CAP_NET_ADMIN)) return -EPERM; if (data->reg_num & ~(0x1F)) return -EFAULT; mii_reg = data->val_in; if (e1000_write_phy_reg(&adapter->hw, data->reg_num, data->val_in)) return -EIO; if (adapter->hw.phy_type == e1000_phy_m88) { switch (data->reg_num) { case PHY_CTRL: if(data->val_in & MII_CR_AUTO_NEG_EN) { adapter->hw.autoneg = 1; adapter->hw.autoneg_advertised = 0x2F; } else { if (data->val_in & 0x40) spddplx = SPEED_1000; else if (data->val_in & 0x2000) spddplx = SPEED_100; else spddplx = SPEED_10; spddplx += (data->val_in & 0x100) ? FULL_DUPLEX : HALF_DUPLEX; retval = e1000_set_spd_dplx(adapter, spddplx); if(retval) return retval; } if(netif_running(adapter->netdev)) { e1000_down(adapter); e1000_up(adapter); } else e1000_reset(adapter); break; case M88E1000_PHY_SPEC_CTRL: case M88E1000_EXT_PHY_SPEC_CTRL: if (e1000_phy_reset(&adapter->hw)) return -EIO; break; } } break; default: return -EOPNOTSUPP; } return E1000_SUCCESS; } /** * e1000_rx_checksum - Receive Checksum Offload for 82543 * @adapter: board private structure * @rx_desc: receive descriptor * @sk_buff: socket buffer with received data **/ static inline void e1000_rx_checksum(struct e1000_adapter *adapter, struct e1000_rx_desc *rx_desc, struct sk_buff *skb) { /* 82543 or newer only */ if((adapter->hw.mac_type < e1000_82543) || /* Ignore Checksum bit is set */ (rx_desc->status & E1000_RXD_STAT_IXSM) || /* TCP Checksum has not been calculated */ (!(rx_desc->status & E1000_RXD_STAT_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 & E1000_RXD_ERR_TCPE) { /* let the stack verify checksum errors */ skb->ip_summed = CHECKSUM_NONE; adapter->hw_csum_err++; } else { /* TCP checksum is good */ skb->ip_summed = CHECKSUM_UNNECESSARY; adapter->hw_csum_good++; } } void e1000_pci_set_mwi(struct e1000_hw *hw) { struct e1000_adapter *adapter = hw->back; pci_set_mwi(adapter->pdev); } void e1000_pci_clear_mwi(struct e1000_hw *hw) { struct e1000_adapter *adapter = hw->back; pci_clear_mwi(adapter->pdev); } void e1000_read_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value) { struct e1000_adapter *adapter = hw->back; pci_read_config_word(adapter->pdev, reg, value); } void e1000_write_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value) { struct e1000_adapter *adapter = hw->back; pci_write_config_word(adapter->pdev, reg, *value); } uint32_t e1000_io_read(struct e1000_hw *hw, unsigned long port) { return inl(port); } void e1000_io_write(struct e1000_hw *hw, unsigned long port, uint32_t value) { outl(value, port); } static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp) { struct e1000_adapter *adapter = netdev->priv; uint32_t ctrl, rctl; e1000_irq_disable(adapter); adapter->vlgrp = grp; if(grp) { /* enable VLAN tag insert/strip */ ctrl = E1000_READ_REG(&adapter->hw, CTRL); ctrl |= E1000_CTRL_VME; E1000_WRITE_REG(&adapter->hw, CTRL, ctrl); /* enable VLAN receive filtering */ rctl = E1000_READ_REG(&adapter->hw, RCTL); rctl |= E1000_RCTL_VFE; rctl &= ~E1000_RCTL_CFIEN; E1000_WRITE_REG(&adapter->hw, RCTL, rctl); } else { /* disable VLAN tag insert/strip */ ctrl = E1000_READ_REG(&adapter->hw, CTRL); ctrl &= ~E1000_CTRL_VME; E1000_WRITE_REG(&adapter->hw, CTRL, ctrl); /* disable VLAN filtering */ rctl = E1000_READ_REG(&adapter->hw, RCTL); rctl &= ~E1000_RCTL_VFE; E1000_WRITE_REG(&adapter->hw, RCTL, rctl); } e1000_irq_enable(adapter); } static void e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid) { struct e1000_adapter *adapter = netdev->priv; uint32_t vfta, index; /* add VID to filter table */ index = (vid >> 5) & 0x7F; vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index); vfta |= (1 << (vid & 0x1F)); e1000_write_vfta(&adapter->hw, index, vfta); } static void e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid) { struct e1000_adapter *adapter = netdev->priv; uint32_t vfta, index; e1000_irq_disable(adapter); if(adapter->vlgrp) adapter->vlgrp->vlan_devices[vid] = NULL; e1000_irq_enable(adapter); /* remove VID from filter table*/ index = (vid >> 5) & 0x7F; vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index); vfta &= ~(1 << (vid & 0x1F)); e1000_write_vfta(&adapter->hw, index, vfta); } static void e1000_restore_vlan(struct e1000_adapter *adapter) { e1000_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; e1000_vlan_rx_add_vid(adapter->netdev, vid); } } } int e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx) { adapter->hw.autoneg = 0; switch(spddplx) { case SPEED_10 + DUPLEX_HALF: adapter->hw.forced_speed_duplex = e1000_10_half; break; case SPEED_10 + DUPLEX_FULL: adapter->hw.forced_speed_duplex = e1000_10_full; break; case SPEED_100 + DUPLEX_HALF: adapter->hw.forced_speed_duplex = e1000_100_half; break; case SPEED_100 + DUPLEX_FULL: adapter->hw.forced_speed_duplex = e1000_100_full; break; case SPEED_1000 + DUPLEX_FULL: adapter->hw.autoneg = 1; adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL; break; case SPEED_1000 + DUPLEX_HALF: /* not supported */ default: return -EINVAL; } return 0; } static int e1000_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) == &e1000_driver) e1000_suspend(pdev, 3); } } return NOTIFY_DONE; } static int e1000_suspend(struct pci_dev *pdev, uint32_t state) { struct net_device *netdev = pci_get_drvdata(pdev); struct e1000_adapter *adapter = netdev->priv; uint32_t ctrl, ctrl_ext, rctl, manc, status; uint32_t wufc = adapter->wol; netif_device_detach(netdev); if(netif_running(netdev)) e1000_down(adapter); status = E1000_READ_REG(&adapter->hw, STATUS); if(status & E1000_STATUS_LU) wufc &= ~E1000_WUFC_LNKC; if(wufc) { e1000_setup_rctl(adapter); e1000_set_multi(netdev); /* turn on all-multi mode if wake on multicast is enabled */ if(adapter->wol & E1000_WUFC_MC) { rctl = E1000_READ_REG(&adapter->hw, RCTL); rctl |= E1000_RCTL_MPE; E1000_WRITE_REG(&adapter->hw, RCTL, rctl); } if(adapter->hw.mac_type >= e1000_82540) { ctrl = E1000_READ_REG(&adapter->hw, CTRL); /* advertise wake from D3Cold */ #define E1000_CTRL_ADVD3WUC 0x00100000 /* phy power management enable */ #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000 ctrl |= E1000_CTRL_ADVD3WUC | E1000_CTRL_EN_PHY_PWR_MGMT; E1000_WRITE_REG(&adapter->hw, CTRL, ctrl); } if(adapter->hw.media_type == e1000_media_type_fiber || adapter->hw.media_type == e1000_media_type_internal_serdes) { /* keep the laser running in D3 */ ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT); ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA; E1000_WRITE_REG(&adapter->hw, CTRL_EXT, ctrl_ext); } E1000_WRITE_REG(&adapter->hw, WUC, E1000_WUC_PME_EN); E1000_WRITE_REG(&adapter->hw, WUFC, wufc); pci_enable_wake(pdev, 3, 1); pci_enable_wake(pdev, 4, 1); /* 4 == D3 cold */ } else { E1000_WRITE_REG(&adapter->hw, WUC, 0); E1000_WRITE_REG(&adapter->hw, WUFC, 0); pci_enable_wake(pdev, 3, 0); pci_enable_wake(pdev, 4, 0); /* 4 == D3 cold */ } pci_save_state(pdev, adapter->pci_state); if(adapter->hw.mac_type >= e1000_82540 && adapter->hw.media_type == e1000_media_type_copper) { manc = E1000_READ_REG(&adapter->hw, MANC); if(manc & E1000_MANC_SMBUS_EN) { manc |= E1000_MANC_ARP_EN; E1000_WRITE_REG(&adapter->hw, MANC, manc); pci_enable_wake(pdev, 3, 1); pci_enable_wake(pdev, 4, 1); /* 4 == D3 cold */ } } state = (state > 0) ? 3 : 0; pci_set_power_state(pdev, state); return 0; } #ifdef CONFIG_PM static int e1000_resume(struct pci_dev *pdev) { struct net_device *netdev = pci_get_drvdata(pdev); struct e1000_adapter *adapter = netdev->priv; uint32_t manc; pci_set_power_state(pdev, 0); pci_restore_state(pdev, adapter->pci_state); pci_enable_wake(pdev, 3, 0); pci_enable_wake(pdev, 4, 0); /* 4 == D3 cold */ e1000_reset(adapter); E1000_WRITE_REG(&adapter->hw, WUS, ~0); if(netif_running(netdev)) e1000_up(adapter); netif_device_attach(netdev); if(adapter->hw.mac_type >= e1000_82540 && adapter->hw.media_type == e1000_media_type_copper) { manc = E1000_READ_REG(&adapter->hw, MANC); manc &= ~(E1000_MANC_ARP_EN); E1000_WRITE_REG(&adapter->hw, MANC, manc); } return 0; } #endif #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 e1000_netpoll (struct net_device *dev) { struct e1000_adapter *adapter = dev->priv; disable_irq(adapter->pdev->irq); e1000_intr (adapter->pdev->irq, dev, NULL); enable_irq(adapter->pdev->irq); } #endif /* e1000_main.c */