patch-2.4.20 linux-2.4.20/drivers/net/e1000/e1000_main.c
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- Lines: 2288
- Date:
Thu Nov 28 15:53:13 2002
- Orig file:
linux-2.4.19/drivers/net/e1000/e1000_main.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -urN linux-2.4.19/drivers/net/e1000/e1000_main.c linux-2.4.20/drivers/net/e1000/e1000_main.c
@@ -0,0 +1,2287 @@
+/*******************************************************************************
+
+
+ Copyright(c) 1999 - 2002 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
+
+*******************************************************************************/
+
+#define __E1000_MAIN__
+#include "e1000.h"
+
+/* Change Log
+ *
+ * 4.4.12 10/15/02
+ * o Clean up: use members of pci_device rather than direct calls to
+ * pci_read_config_word.
+ * o Bug fix: changed default flow control settings.
+ * o Clean up: ethtool file now has an inclusive list for adapters in the
+ * Wake-On-LAN capabilities instead of an exclusive list.
+ * o Bug fix: miscellaneous WoL bug fixes.
+ * o Added software interrupt for clearing rx ring
+ * o Bug fix: easier to undo "forcing" of 1000/fd using ethtool.
+ * o Now setting netdev->mem_end in e1000_probe.
+ * o Clean up: Moved tx_timeout from interrupt context to process context
+ * using schedule_task.
+ *
+ * 4.3.15 8/9/02
+ * o Converted from Dual BSD/GPL license to GPL license.
+ * o Clean up: use pci_[clear|set]_mwi rather than direct calls to
+ * pci_write_config_word.
+ * o Bug fix: added read-behind-write calls to post writes before delays.
+ * o Bug fix: removed mdelay busy-waits in interrupt context.
+ * o Clean up: direct clear of descriptor bits rather than using memset.
+ * o Bug fix: added wmb() for ia-64 between descritor writes and advancing
+ * descriptor tail.
+ * o Feature: added locking mechanism for asf functionality.
+ * o Feature: exposed two Tx and one Rx interrupt delay knobs for finer
+ * control over interurpt rate tuning.
+ * o Misc ethtool bug fixes.
+ *
+ * 4.3.2 7/5/02
+ */
+
+char e1000_driver_name[] = "e1000";
+char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
+char e1000_driver_version[] = "4.4.12-k1";
+char e1000_copyright[] = "Copyright (c) 1999-2002 Intel Corporation.";
+
+/* e1000_pci_tbl - PCI Device ID Table
+ *
+ * Private driver_data field (last one) stores an index into e1000_strings
+ * 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, String Index }
+ */
+static struct pci_device_id e1000_pci_tbl[] __devinitdata = {
+ /* Intel(R) PRO/1000 Network Connection */
+ {0x8086, 0x1000, 0x8086, 0x1000, 0, 0, 0},
+ {0x8086, 0x1001, 0x8086, 0x1003, 0, 0, 0},
+ {0x8086, 0x1004, 0x8086, 0x1004, 0, 0, 0},
+ {0x8086, 0x1008, 0x8086, 0x1107, 0, 0, 0},
+ {0x8086, 0x1009, 0x8086, 0x1109, 0, 0, 0},
+ {0x8086, 0x100C, 0x8086, 0x1112, 0, 0, 0},
+ {0x8086, 0x100E, 0x8086, 0x001E, 0, 0, 0},
+ /* Compaq Gigabit Ethernet Server Adapter */
+ {0x8086, 0x1000, 0x0E11, PCI_ANY_ID, 0, 0, 1},
+ {0x8086, 0x1001, 0x0E11, PCI_ANY_ID, 0, 0, 1},
+ {0x8086, 0x1004, 0x0E11, PCI_ANY_ID, 0, 0, 1},
+ /* IBM Mobile, Desktop & Server Adapters */
+ {0x8086, 0x1000, 0x1014, PCI_ANY_ID, 0, 0, 2},
+ {0x8086, 0x1001, 0x1014, PCI_ANY_ID, 0, 0, 2},
+ {0x8086, 0x1004, 0x1014, PCI_ANY_ID, 0, 0, 2},
+ /* Generic */
+ {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, 0x1011, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+ {0x8086, 0x1010, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+ {0x8086, 0x1012, 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, 0x101E, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+ /* required last entry */
+ {0,}
+};
+
+MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
+
+static char *e1000_strings[] = {
+ "Intel(R) PRO/1000 Network Connection",
+ "Compaq Gigabit Ethernet Server Adapter",
+ "IBM Mobile, Desktop & Server Adapters"
+};
+
+/* Local Function Prototypes */
+
+int e1000_up(struct e1000_adapter *adapter);
+void e1000_down(struct e1000_adapter *adapter);
+void e1000_reset(struct e1000_adapter *adapter);
+
+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 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 int e1000_setup_tx_resources(struct e1000_adapter *adapter);
+static int e1000_setup_rx_resources(struct e1000_adapter *adapter);
+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_free_tx_resources(struct e1000_adapter *adapter);
+static void e1000_free_rx_resources(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 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 void e1000_update_stats(struct e1000_adapter *adapter);
+static inline void e1000_irq_disable(struct e1000_adapter *adapter);
+static inline void e1000_irq_enable(struct e1000_adapter *adapter);
+static void e1000_intr(int irq, void *data, struct pt_regs *regs);
+static void e1000_clean_tx_irq(struct e1000_adapter *adapter);
+static void e1000_clean_rx_irq(struct e1000_adapter *adapter);
+static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter);
+static int e1000_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_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 int e1000_notify_reboot(struct notifier_block *, unsigned long event, void *ptr);
+static int e1000_notify_netdev(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
+
+struct notifier_block e1000_notifier_reboot = {
+ .notifier_call = e1000_notify_reboot,
+ .next = NULL,
+ .priority = 0
+};
+
+struct notifier_block e1000_notifier_netdev = {
+ .notifier_call = e1000_notify_netdev,
+ .next = NULL,
+ .priority = 0
+};
+
+/* Exported from other modules */
+
+extern void e1000_check_options(struct e1000_adapter *adapter);
+extern void e1000_proc_dev_setup(struct e1000_adapter *adapter);
+extern void e1000_proc_dev_free(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);
+ register_netdevice_notifier(&e1000_notifier_netdev);
+ }
+ 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);
+ unregister_netdevice_notifier(&e1000_notifier_netdev);
+ pci_unregister_driver(&e1000_driver);
+}
+
+module_exit(e1000_exit_module);
+
+
+int
+e1000_up(struct e1000_adapter *adapter)
+{
+ struct net_device *netdev = adapter->netdev;
+
+ if(request_irq(netdev->irq, &e1000_intr, SA_SHIRQ | SA_SAMPLE_RANDOM,
+ netdev->name, netdev))
+ return -1;
+
+ /* hardware has been reset, we need to reload some things */
+
+ e1000_set_multi(netdev);
+
+ e1000_configure_tx(adapter);
+ e1000_setup_rctl(adapter);
+ e1000_configure_rx(adapter);
+ e1000_alloc_rx_buffers(adapter);
+
+ 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(netdev->irq, netdev);
+ 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)
+{
+ /* Repartition Pba for greater than 9k mtu
+ * To take effect CTRL.RST is required.
+ */
+
+ if(adapter->rx_buffer_len > E1000_RXBUFFER_8192)
+ E1000_WRITE_REG(&adapter->hw, PBA, E1000_JUMBO_PBA);
+ else
+ E1000_WRITE_REG(&adapter->hw, PBA, E1000_DEFAULT_PBA);
+
+ 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);
+ 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;
+
+ if((i = pci_enable_device(pdev)))
+ return i;
+
+ if(!(i = pci_set_dma_mask(pdev, PCI_DMA_64BIT))) {
+ pci_using_dac = 1;
+ } else {
+ if((i = pci_set_dma_mask(pdev, PCI_DMA_32BIT))) {
+ E1000_ERR("No usable DMA configuration, aborting\n");
+ return i;
+ }
+ pci_using_dac = 0;
+ }
+
+ if((i = pci_request_regions(pdev, e1000_driver_name)))
+ return i;
+
+ pci_set_master(pdev);
+
+ netdev = alloc_etherdev(sizeof(struct e1000_adapter));
+ if(!netdev)
+ 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)
+ 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 = HZ;
+ 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;
+
+ netdev->irq = pdev->irq;
+ 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->id_string = e1000_strings[ent->driver_data];
+
+ /* setup the private structure */
+
+ if(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;
+ }
+
+ if(pci_using_dac)
+ netdev->features |= NETIF_F_HIGHDMA;
+
+ /* make sure the EEPROM is good */
+
+ if(e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
+ printk(KERN_ERR "The EEPROM Checksum Is Not Valid\n");
+ 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))
+ goto err_eeprom;
+
+ e1000_read_part_num(&adapter->hw, &(adapter->part_num));
+
+ e1000_get_bus_info(&adapter->hw);
+
+ if((adapter->hw.mac_type == e1000_82544) &&
+ (adapter->hw.bus_type == e1000_bus_type_pcix))
+
+ adapter->max_data_per_txd = 4096;
+ else
+ adapter->max_data_per_txd = MAX_JUMBO_FRAME_SIZE;
+
+
+ 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);
+ memcpy(adapter->ifname, netdev->name, IFNAMSIZ);
+ adapter->ifname[IFNAMSIZ-1] = 0;
+
+ /* 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: %s\n", netdev->name, adapter->id_string);
+ e1000_check_options(adapter);
+ e1000_proc_dev_setup(adapter);
+
+ /* Initial Wake on LAN setting
+ * If APM wake is enabled in the EEPROM,
+ * enable the ACPI Magic Packet filter
+ */
+
+ if((adapter->hw.mac_type >= e1000_82544) &&
+ (E1000_READ_REG(&adapter->hw, WUC) & E1000_WUC_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:
+ pci_release_regions(pdev);
+ kfree(netdev);
+err_alloc_etherdev:
+ return -ENOMEM;
+}
+
+/**
+ * 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) {
+ 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);
+
+ e1000_proc_dev_free(adapter);
+
+ iounmap(adapter->hw.hw_addr);
+ pci_release_regions(pdev);
+
+ kfree(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 -1;
+ }
+
+ /* flow control settings */
+
+ hw->fc_high_water = E1000_FC_HIGH_THRESH;
+ hw->fc_low_water = E1000_FC_LOW_THRESH;
+ hw->fc_pause_time = E1000_FC_PAUSE_TIME;
+ hw->fc_send_xon = 1;
+
+ /* Media type - copper or fiber */
+
+ if(hw->mac_type >= e1000_82543) {
+ uint32_t status = E1000_READ_REG(hw, STATUS);
+
+ if(status & E1000_STATUS_TBIMODE)
+ hw->media_type = e1000_media_type_fiber;
+ else
+ hw->media_type = e1000_media_type_copper;
+ } else {
+ hw->media_type = e1000_media_type_fiber;
+ }
+
+ 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;
+ }
+
+ atomic_set(&adapter->irq_sem, 1);
+ spin_lock_init(&adapter->stats_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;
+
+ /* allocate transmit descriptors */
+
+ if(e1000_setup_tx_resources(adapter))
+ goto err_setup_tx;
+
+ /* allocate receive descriptors */
+
+ if(e1000_setup_rx_resources(adapter))
+ goto err_setup_rx;
+
+ if(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 -EBUSY;
+}
+
+/**
+ * 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
+ **/
+
+static 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)
+ 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 this adapter */
+ adapter->txd_cmd = E1000_TXD_CMD_IFCS | E1000_TXD_CMD_IDE;
+
+ if(adapter->hw.report_tx_early == 1)
+ adapter->txd_cmd |= E1000_TXD_CMD_RS;
+ else
+ adapter->txd_cmd |= E1000_TXD_CMD_RPS;
+}
+
+/**
+ * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
+ * @adapter: board private structure
+ *
+ * Returns 0 on success, negative on failure
+ **/
+
+static 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);
+
+ /* Set the interrupt throttling rate. Value is calculated
+ * as DEFAULT_ITR = 1/(MAX_INTS_PER_SEC * 256ns) */
+#define MAX_INTS_PER_SEC 8000
+#define DEFAULT_ITR 1000000000/(MAX_INTS_PER_SEC * 256)
+ E1000_WRITE_REG(&adapter->hw, ITR, DEFAULT_ITR);
+ }
+
+ /* 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
+ **/
+
+static 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 pci_dev *pdev = adapter->pdev;
+ unsigned long size;
+ int i;
+
+ /* Free all the Tx ring sk_buffs */
+
+ for(i = 0; i < adapter->tx_ring.count; i++) {
+ if(adapter->tx_ring.buffer_info[i].skb) {
+
+ pci_unmap_page(pdev,
+ adapter->tx_ring.buffer_info[i].dma,
+ adapter->tx_ring.buffer_info[i].length,
+ PCI_DMA_TODEVICE);
+
+ dev_kfree_skb(adapter->tx_ring.buffer_info[i].skb);
+
+ adapter->tx_ring.buffer_info[i].skb = NULL;
+ }
+ }
+
+ size = sizeof(struct e1000_buffer) * adapter->tx_ring.count;
+ memset(adapter->tx_ring.buffer_info, 0, size);
+
+ /* Zero out the descriptor ring */
+
+ memset(adapter->tx_ring.desc, 0, adapter->tx_ring.size);
+
+ adapter->tx_ring.next_to_use = 0;
+ adapter->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
+ **/
+
+static void
+e1000_free_rx_resources(struct e1000_adapter *adapter)
+{
+ struct pci_dev *pdev = adapter->pdev;
+
+ e1000_clean_rx_ring(adapter);
+
+ kfree(adapter->rx_ring.buffer_info);
+ adapter->rx_ring.buffer_info = NULL;
+
+ pci_free_consistent(pdev, adapter->rx_ring.size,
+ adapter->rx_ring.desc, adapter->rx_ring.dma);
+
+ adapter->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 pci_dev *pdev = adapter->pdev;
+ unsigned long size;
+ int i;
+
+ /* Free all the Rx ring sk_buffs */
+
+ for(i = 0; i < adapter->rx_ring.count; i++) {
+ if(adapter->rx_ring.buffer_info[i].skb) {
+
+ pci_unmap_single(pdev,
+ adapter->rx_ring.buffer_info[i].dma,
+ adapter->rx_ring.buffer_info[i].length,
+ PCI_DMA_FROMDEVICE);
+
+ dev_kfree_skb(adapter->rx_ring.buffer_info[i].skb);
+
+ adapter->rx_ring.buffer_info[i].skb = NULL;
+ }
+ }
+
+ size = sizeof(struct e1000_buffer) * adapter->rx_ring.count;
+ memset(adapter->rx_ring.buffer_info, 0, size);
+
+ /* Zero out the descriptor ring */
+
+ memset(adapter->rx_ring.desc, 0, adapter->rx_ring.size);
+
+ adapter->rx_ring.next_to_clean = 0;
+ adapter->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;
+
+ /* 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
+ * resposible 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 15 multicast address into the exact filters 1-15
+ * RAR 0 is used for the station MAC adddress
+ * if there are not 15 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_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;
+ int i;
+
+ e1000_check_for_link(&adapter->hw);
+
+ if(E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU) {
+ 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);
+ }
+ } 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_update_stats(adapter);
+ e1000_update_adaptive(&adapter->hw);
+
+
+ /* 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_VLAN_MASK 0xffff0000
+#define E1000_TX_FLAGS_VLAN_SHIFT 16
+
+static inline boolean_t
+e1000_tx_csum(struct e1000_adapter *adapter, struct sk_buff *skb)
+{
+ struct e1000_context_desc *context_desc;
+ 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(adapter->txd_cmd | E1000_TXD_CMD_DEXT);
+
+ i = (i + 1) % adapter->tx_ring.count;
+ adapter->tx_ring.next_to_use = i;
+
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+static inline int
+e1000_tx_map(struct e1000_adapter *adapter, struct sk_buff *skb)
+{
+ struct e1000_desc_ring *tx_ring = &adapter->tx_ring;
+ int len, offset, size, count, i;
+
+ int f;
+ len = skb->len - skb->data_len;
+
+ i = (tx_ring->next_to_use + tx_ring->count - 1) % tx_ring->count;
+ count = 0;
+
+ offset = 0;
+
+ while(len) {
+ i = (i + 1) % tx_ring->count;
+ size = min(len, adapter->max_data_per_txd);
+ tx_ring->buffer_info[i].length = size;
+ tx_ring->buffer_info[i].dma =
+ pci_map_single(adapter->pdev,
+ skb->data + offset,
+ size,
+ PCI_DMA_TODEVICE);
+ tx_ring->buffer_info[i].time_stamp = jiffies;
+
+ len -= size;
+ offset += size;
+ count++;
+ }
+
+ for(f = 0; f < skb_shinfo(skb)->nr_frags; f++) {
+ struct skb_frag_struct *frag;
+
+ frag = &skb_shinfo(skb)->frags[f];
+ len = frag->size;
+ offset = 0;
+
+ while(len) {
+ i = (i + 1) % tx_ring->count;
+ size = min(len, adapter->max_data_per_txd);
+ tx_ring->buffer_info[i].length = size;
+ tx_ring->buffer_info[i].dma =
+ pci_map_page(adapter->pdev,
+ frag->page,
+ frag->page_offset + offset,
+ size,
+ PCI_DMA_TODEVICE);
+
+ len -= size;
+ offset += size;
+ count++;
+ }
+ }
+ tx_ring->buffer_info[i].skb = skb;
+
+ 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;
+ uint32_t txd_upper, txd_lower;
+ int i;
+
+ txd_upper = 0;
+ txd_lower = adapter->txd_cmd;
+
+ 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--) {
+ tx_desc = E1000_TX_DESC(*tx_ring, i);
+ tx_desc->buffer_addr = cpu_to_le64(tx_ring->buffer_info[i].dma);
+ tx_desc->lower.data =
+ cpu_to_le32(txd_lower | tx_ring->buffer_info[i].length);
+ tx_desc->upper.data = cpu_to_le32(txd_upper);
+ i = (i + 1) % tx_ring->count;
+ }
+
+ tx_desc->lower.data |= cpu_to_le32(E1000_TXD_CMD_EOP);
+
+ /* 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);
+}
+
+#define TXD_USE_COUNT(S, X) (((S) / (X)) + (((S) % (X)) ? 1 : 0))
+
+static int
+e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
+{
+ struct e1000_adapter *adapter = netdev->priv;
+ int tx_flags = 0, count;
+
+ int f;
+
+ count = TXD_USE_COUNT(skb->len - skb->data_len,
+ adapter->max_data_per_txd);
+ for(f = 0; f < skb_shinfo(skb)->nr_frags; f++)
+ count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
+ adapter->max_data_per_txd);
+
+ if(skb->ip_summed == CHECKSUM_HW)
+ count++;
+
+ if(E1000_DESC_UNUSED(&adapter->tx_ring) < count) {
+ netif_stop_queue(netdev);
+ return 1;
+ }
+
+ if(e1000_tx_csum(adapter, skb))
+ tx_flags |= E1000_TX_FLAGS_CSUM;
+
+ 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);
+ }
+
+ count = e1000_tx_map(adapter, skb);
+
+ e1000_tx_queue(adapter, count, tx_flags);
+
+ netdev->trans_start = jiffies;
+
+ 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;
+
+ 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
+ **/
+
+static 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);
+
+ spin_unlock_irqrestore(&adapter->stats_lock, flags);
+
+ /* 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) &&
+ !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
+ adapter->phy_stats.receive_errors += phy_tmp;
+ }
+}
+
+/**
+ * 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 void
+e1000_intr(int irq, void *data, struct pt_regs *regs)
+{
+ struct net_device *netdev = data;
+ struct e1000_adapter *adapter = netdev->priv;
+ uint32_t icr;
+ int i = E1000_MAX_INTR;
+
+ while(i && (icr = E1000_READ_REG(&adapter->hw, ICR))) {
+
+ if(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
+ adapter->hw.get_link_status = 1;
+ mod_timer(&adapter->watchdog_timer, jiffies);
+ }
+
+ e1000_clean_rx_irq(adapter);
+ e1000_clean_tx_irq(adapter);
+ i--;
+
+ }
+}
+
+/**
+ * e1000_clean_tx_irq - Reclaim resources after transmit completes
+ * @adapter: board private structure
+ **/
+
+static void
+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;
+ int i;
+
+ i = tx_ring->next_to_clean;
+ tx_desc = E1000_TX_DESC(*tx_ring, i);
+
+ while(tx_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
+
+ if(tx_ring->buffer_info[i].dma) {
+
+ pci_unmap_page(pdev,
+ tx_ring->buffer_info[i].dma,
+ tx_ring->buffer_info[i].length,
+ PCI_DMA_TODEVICE);
+
+ tx_ring->buffer_info[i].dma = 0;
+ }
+
+ if(tx_ring->buffer_info[i].skb) {
+
+ dev_kfree_skb_any(tx_ring->buffer_info[i].skb);
+
+ tx_ring->buffer_info[i].skb = NULL;
+ }
+
+ tx_desc->upper.data = 0;
+
+ i = (i + 1) % tx_ring->count;
+ tx_desc = E1000_TX_DESC(*tx_ring, i);
+ }
+
+ tx_ring->next_to_clean = i;
+
+ if(netif_queue_stopped(netdev) && netif_carrier_ok(netdev) &&
+ (E1000_DESC_UNUSED(tx_ring) > E1000_TX_QUEUE_WAKE)) {
+
+ netif_wake_queue(netdev);
+ }
+}
+
+/**
+ * e1000_clean_rx_irq - Send received data up the network stack,
+ * @adapter: board private structure
+ **/
+
+static void
+e1000_clean_rx_irq(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 sk_buff *skb;
+ unsigned long flags;
+ uint32_t length;
+ uint8_t last_byte;
+ int i;
+
+ i = rx_ring->next_to_clean;
+ rx_desc = E1000_RX_DESC(*rx_ring, i);
+
+ while(rx_desc->status & E1000_RXD_STAT_DD) {
+
+ pci_unmap_single(pdev,
+ rx_ring->buffer_info[i].dma,
+ rx_ring->buffer_info[i].length,
+ PCI_DMA_FROMDEVICE);
+
+ skb = rx_ring->buffer_info[i].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;
+ rx_ring->buffer_info[i].skb = NULL;
+
+ i = (i + 1) % rx_ring->count;
+
+ 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;
+ rx_ring->buffer_info[i].skb = NULL;
+
+ i = (i + 1) % rx_ring->count;
+
+ 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);
+ if(adapter->vlgrp && (rx_desc->status & E1000_RXD_STAT_VP)) {
+ vlan_hwaccel_rx(skb, adapter->vlgrp,
+ (rx_desc->special & E1000_RXD_SPC_VLAN_MASK));
+ } else {
+ netif_rx(skb);
+ }
+ netdev->last_rx = jiffies;
+
+ rx_desc->status = 0;
+ rx_ring->buffer_info[i].skb = NULL;
+
+ i = (i + 1) % rx_ring->count;
+
+ rx_desc = E1000_RX_DESC(*rx_ring, i);
+ }
+
+ rx_ring->next_to_clean = i;
+
+ e1000_alloc_rx_buffers(adapter);
+}
+
+/**
+ * e1000_alloc_rx_buffers - Replace used receive buffers
+ * @data: 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 sk_buff *skb;
+ int reserve_len;
+ int i;
+
+ reserve_len = 2;
+
+ i = rx_ring->next_to_use;
+
+ while(!rx_ring->buffer_info[i].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;
+
+ rx_ring->buffer_info[i].skb = skb;
+ rx_ring->buffer_info[i].length = adapter->rx_buffer_len;
+ rx_ring->buffer_info[i].dma =
+ pci_map_single(pdev,
+ skb->data,
+ adapter->rx_buffer_len,
+ PCI_DMA_FROMDEVICE);
+
+ rx_desc->buffer_addr = cpu_to_le64(rx_ring->buffer_info[i].dma);
+
+ if(!(i % E1000_RX_BUFFER_WRITE)) {
+ /* 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);
+ }
+
+ i = (i + 1) % rx_ring->count;
+ }
+
+ rx_ring->next_to_use = i;
+}
+
+/**
+ * e1000_ioctl -
+ * @netdev:
+ * @ifreq:
+ * @cmd:
+ **/
+
+static int
+e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
+{
+ switch (cmd) {
+ case SIOCETHTOOL:
+ return e1000_ethtool_ioctl(netdev, ifr);
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+/**
+ * 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, uint32_t port)
+{
+ return inl(port);
+}
+
+void
+e1000_io_write(struct e1000_hw *hw, uint32_t 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 */
+
+ E1000_WRITE_REG(&adapter->hw, VET, ETHERNET_IEEE_VLAN_TYPE);
+
+ 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 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:
+ pci_for_each_dev(pdev) {
+ if(pci_dev_driver(pdev) == &e1000_driver)
+ e1000_suspend(pdev, 3);
+ }
+ }
+ return NOTIFY_DONE;
+}
+
+static int
+e1000_notify_netdev(struct notifier_block *nb, unsigned long event, void *p)
+{
+ struct e1000_adapter *adapter;
+ struct net_device *netdev = p;
+ if(netdev == NULL)
+ return NOTIFY_DONE;
+
+ switch(event) {
+ case NETDEV_CHANGENAME:
+ if(netdev->open == e1000_open) {
+ adapter = netdev->priv;
+ /* rename the proc nodes the easy way */
+ e1000_proc_dev_free(adapter);
+ memcpy(adapter->ifname, netdev->name, IFNAMSIZ);
+ adapter->ifname[IFNAMSIZ-1] = 0;
+ e1000_proc_dev_setup(adapter);
+ }
+ break;
+ }
+ 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;
+
+ netif_device_detach(netdev);
+
+ if(netif_running(netdev))
+ e1000_down(adapter);
+
+ if(adapter->wol) {
+ 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) {
+ /* 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, adapter->wol);
+ 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) {
+ 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);
+ state = 0;
+ }
+ }
+
+ 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) {
+ manc = E1000_READ_REG(&adapter->hw, MANC);
+ manc &= ~(E1000_MANC_ARP_EN);
+ E1000_WRITE_REG(&adapter->hw, MANC, manc);
+ }
+
+ return 0;
+}
+#endif
+
+/* e1000_main.c */
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)