/drivers/e1000-6.x/src/e1000_main.c
C | 5042 lines | 3632 code | 711 blank | 699 comment | 558 complexity | d9e8f1bb3eb4ca7692a3fe71ae6225ac MD5 | raw file
Possible License(s): GPL-2.0, BSD-3-Clause
- /*******************************************************************************
-
- Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
-
- This program is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by the Free
- Software Foundation; either version 2 of the License, or (at your option)
- any later version.
-
- This program is distributed in the hope that it will be useful, but WITHOUT
- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- more details.
-
- You should have received a copy of the GNU General Public License along with
- this program; if not, write to the Free Software Foundation, Inc., 59
- Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-
- The full GNU General Public License is included in this distribution in the
- file called LICENSE.
-
- Contact Information:
- Linux NICS <linux.nics@intel.com>
- Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
- *******************************************************************************/
- #include "e1000.h"
- /* Change Log
- * 6.0.58 4/20/05
- * o e1000_set_spd_dplx tests for compatible speed/duplex specification
- * for fiber adapters
- * 6.0.57 4/19/05
- * o Added code to fix register test failure for devices >= 82571
- *
- * 6.0.52 3/15/05
- * o Added stats_lock around e1000_read_phy_reg commands to avoid concurrent
- * calls, one from mii_ioctl and other from within update_stats while
- * processing MIIREG ioctl.
- *
- * 6.1.2 4/13/05
- * o Fixed ethtool diagnostics
- * o Enabled flow control to take default eeprom settings
- * o Added stats_lock around e1000_read_phy_reg commands to avoid concurrent
- * calls, one from mii_ioctl and other from within update_stats while processing
- * MIIREG ioctl.
- * 6.0.55 3/23/05
- * o Support for MODULE_VERSION
- * o Fix APM setting for 82544 based adapters
- * 6.0.54 3/26/05
- * o Added a timer to expire packets that were deferred for cleanup
- * 6.0.52 3/15/05
- * o Added stats_lock around e1000_read_phy_reg commands to avoid concurrent
- * calls, one from mii_ioctl and other from within update_stats while
- * processing MIIREG ioctl.
- * 6.0.47 3/2/05
- * o Added enhanced functionality to the loopback diags to wrap the
- * descriptor rings
- * o Added manageability vlan filtering workaround.
- *
- * 6.0.44+ 2/15/05
- * o Added code to handle raw packet based DHCP packets
- * o Added code to fix the errata 10 buffer overflow issue
- * o Sync up with WR01-05
- * o applied Anton's patch to resolve tx hang in hardware
- * o e1000 timeouts with early writeback patch
- * o Removed Queensport IDs
- * o fixed driver panic if MAC receives a bad large packets when packet
- * split is enabled
- * o Applied Andrew Mortons patch - e1000 stops working after resume
- * 5.2.29 12/24/03
- * o Bug fix: Endianess issue causing ethtool diags to fail on ppc.
- * o Bug fix: Use pdev->irq instead of netdev->irq for MSI support.
- * o Report driver message on user override of InterruptThrottleRate module
- * parameter.
- * o Bug fix: Change I/O address storage from uint32_t to unsigned long.
- * o Feature: Added ethtool RINGPARAM support.
- * o Feature: Added netpoll support.
- * o Bug fix: Race between Tx queue and Tx clean fixed with a spin lock.
- * o Bug fix: Allow 1000/Full setting for autoneg param for fiber connections.
- * Jon D Mason [jonmason@us.ibm.com].
- *
- * 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 Bug fix: Better propagation of error codes.
- * [Janice Girouard (janiceg -a-t- 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. [Rober Olsson
- * (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";
- #ifndef CONFIG_E1000_NAPI
- #define DRIVERNAPI
- #else
- #define DRIVERNAPI "-NAPI"
- #endif
- #define DRV_VERSION "6.1.16.2.DB"DRIVERNAPI
- char e1000_driver_version[] = DRV_VERSION;
- char e1000_copyright[] = "Copyright (c) 1999-2005 Intel Corporation.";
- #if !HAVE___NETIF_RECEIVE_SKB
- #define netif_receive_skb(skb) netif_receive_skb((skb), (skb)->protocol, 0)
- #endif
- /* e1000_pci_tbl - PCI Device ID Table
- *
- * Last entry must be all 0s
- *
- * Macro expands to...
- * {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
- */
- static struct pci_device_id e1000_pci_tbl[] = {
- INTEL_E1000_ETHERNET_DEVICE(0x1000),
- INTEL_E1000_ETHERNET_DEVICE(0x1001),
- INTEL_E1000_ETHERNET_DEVICE(0x1004),
- INTEL_E1000_ETHERNET_DEVICE(0x1008),
- INTEL_E1000_ETHERNET_DEVICE(0x1009),
- INTEL_E1000_ETHERNET_DEVICE(0x100C),
- INTEL_E1000_ETHERNET_DEVICE(0x100D),
- INTEL_E1000_ETHERNET_DEVICE(0x100E),
- INTEL_E1000_ETHERNET_DEVICE(0x100F),
- INTEL_E1000_ETHERNET_DEVICE(0x1010),
- INTEL_E1000_ETHERNET_DEVICE(0x1011),
- INTEL_E1000_ETHERNET_DEVICE(0x1012),
- INTEL_E1000_ETHERNET_DEVICE(0x1013),
- INTEL_E1000_ETHERNET_DEVICE(0x1014),
- INTEL_E1000_ETHERNET_DEVICE(0x1015),
- INTEL_E1000_ETHERNET_DEVICE(0x1016),
- INTEL_E1000_ETHERNET_DEVICE(0x1017),
- INTEL_E1000_ETHERNET_DEVICE(0x1018),
- INTEL_E1000_ETHERNET_DEVICE(0x1019),
- INTEL_E1000_ETHERNET_DEVICE(0x101A),
- INTEL_E1000_ETHERNET_DEVICE(0x101D),
- INTEL_E1000_ETHERNET_DEVICE(0x101E),
- INTEL_E1000_ETHERNET_DEVICE(0x1026),
- INTEL_E1000_ETHERNET_DEVICE(0x1027),
- INTEL_E1000_ETHERNET_DEVICE(0x1028),
- INTEL_E1000_ETHERNET_DEVICE(0x105E),
- INTEL_E1000_ETHERNET_DEVICE(0x105F),
- INTEL_E1000_ETHERNET_DEVICE(0x1060),
- INTEL_E1000_ETHERNET_DEVICE(0x1075),
- INTEL_E1000_ETHERNET_DEVICE(0x1076),
- INTEL_E1000_ETHERNET_DEVICE(0x1077),
- INTEL_E1000_ETHERNET_DEVICE(0x1078),
- INTEL_E1000_ETHERNET_DEVICE(0x1079),
- INTEL_E1000_ETHERNET_DEVICE(0x107A),
- INTEL_E1000_ETHERNET_DEVICE(0x107B),
- INTEL_E1000_ETHERNET_DEVICE(0x107C),
- INTEL_E1000_ETHERNET_DEVICE(0x107D),
- INTEL_E1000_ETHERNET_DEVICE(0x107E),
- INTEL_E1000_ETHERNET_DEVICE(0x107F),
- INTEL_E1000_ETHERNET_DEVICE(0x108A),
- INTEL_E1000_ETHERNET_DEVICE(0x108B),
- INTEL_E1000_ETHERNET_DEVICE(0x108C),
- INTEL_E1000_ETHERNET_DEVICE(0x109A),
- INTEL_E1000_ETHERNET_DEVICE(0x10A0),
- INTEL_E1000_ETHERNET_DEVICE(0x10A1),
- /* 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_all_tx_resources(struct e1000_adapter *adapter);
- int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
- void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
- void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
- int e1000_setup_tx_resources(struct e1000_adapter *adapter,
- struct e1000_tx_ring *txdr);
- int e1000_setup_rx_resources(struct e1000_adapter *adapter,
- struct e1000_rx_ring *rxdr);
- void e1000_free_tx_resources(struct e1000_adapter *adapter,
- struct e1000_tx_ring *tx_ring);
- void e1000_free_rx_resources(struct e1000_adapter *adapter,
- struct e1000_rx_ring *rx_ring);
- void e1000_update_stats(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 __devexit e1000_remove(struct pci_dev *pdev);
- static int e1000_alloc_queues(struct e1000_adapter *adapter);
- #ifdef CONFIG_E1000_MQ
- static void e1000_setup_queue_mapping(struct e1000_adapter *adapter);
- #endif
- 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_all_tx_rings(struct e1000_adapter *adapter);
- static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
- static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
- struct e1000_tx_ring *tx_ring);
- static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
- struct e1000_rx_ring *rx_ring);
- 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_watchdog_1(struct e1000_adapter *adapter);
- 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 irqreturn_t e1000_intr(int irq, void *data, struct pt_regs *regs);
- static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter,
- struct e1000_tx_ring *tx_ring);
- #ifdef CONFIG_E1000_NAPI
- static int e1000_clean(struct net_device *poll_dev, int *budget);
- static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
- struct e1000_rx_ring *rx_ring,
- int *work_done, int work_to_do);
- static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
- struct e1000_rx_ring *rx_ring,
- int *work_done, int work_to_do);
- #else
- static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
- struct e1000_rx_ring *rx_ring);
- static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
- struct e1000_rx_ring *rx_ring);
- #endif
- static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
- struct e1000_rx_ring *rx_ring);
- static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
- struct e1000_rx_ring *rx_ring);
- static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
- #ifdef SIOCGMIIPHY
- static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
- int cmd);
- #endif
- void set_ethtool_ops(struct net_device *netdev);
- extern int ethtool_ioctl(struct ifreq *ifr);
- extern int e1000_bypass_ctrl_ioctl(struct net_device *netdev, struct ifreq *ifr);
- static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
- static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
- 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);
- #ifdef NETIF_F_HW_VLAN_TX
- 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);
- #endif
- 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
- /* For Click polling */
- static int e1000_tx_pqueue(struct net_device *dev, struct sk_buff *skb);
- static int e1000_tx_start(struct net_device *dev);
- static int e1000_rx_refill(struct net_device *dev, struct sk_buff **);
- static int e1000_tx_eob(struct net_device *dev);
- static struct sk_buff *e1000_tx_clean(struct net_device *dev);
- static struct sk_buff *e1000_rx_poll(struct net_device *dev, int *want);
- static int e1000_poll_on(struct net_device *dev);
- static int e1000_poll_off(struct net_device *dev);
- #ifdef CONFIG_NET_POLL_CONTROLLER
- /* for netdump / net console */
- static void e1000_netpoll (struct net_device *netdev);
- #endif
- #ifdef CONFIG_E1000_MQ
- /* for multiple Rx queues */
- void e1000_rx_schedule(void *data);
- #endif
- struct notifier_block e1000_notifier_reboot = {
- .notifier_call = e1000_notify_reboot,
- .next = NULL,
- .priority = 0
- };
- #undef DEBUG_PRINT
- #ifdef DEBUG_PRINT
- static void e1000_print_rx_buffer_info(struct e1000_buffer *bi);
- static void e1000_print_rx_desc(struct e1000_rx_desc *rx_desc);
- static void e1000_print_skb(struct sk_buff* skb);
- #endif
- /* Exported from other modules */
- extern void e1000_check_options(struct e1000_adapter *adapter);
- 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");
- MODULE_VERSION(DRV_VERSION);
- static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
- module_param(debug, int, 0);
- MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
- /**
- * 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 " w/ Click polling\n");
- 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);
- /**
- * 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(adapter->pdev->irq);
- }
- /**
- * e1000_irq_enable - Enable default interrupt generation settings
- * @adapter: board private structure
- **/
- static inline void
- e1000_irq_enable(struct e1000_adapter *adapter)
- {
- if(likely(atomic_dec_and_test(&adapter->irq_sem))) {
- E1000_WRITE_REG(&adapter->hw, IMS, IMS_ENABLE_MASK);
- E1000_WRITE_FLUSH(&adapter->hw);
- }
- }
- #ifdef NETIF_F_HW_VLAN_TX
- void
- e1000_update_mng_vlan(struct e1000_adapter *adapter)
- {
- struct net_device *netdev = adapter->netdev;
- uint16_t vid = adapter->hw.mng_cookie.vlan_id;
- uint16_t old_vid = adapter->mng_vlan_id;
- if(adapter->vlgrp) {
- if(!adapter->vlgrp->vlan_devices[vid]) {
- if(adapter->hw.mng_cookie.status &
- E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
- e1000_vlan_rx_add_vid(netdev, vid);
- adapter->mng_vlan_id = vid;
- } else
- adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
-
- if((old_vid != (uint16_t)E1000_MNG_VLAN_NONE) &&
- (vid != old_vid) &&
- !adapter->vlgrp->vlan_devices[old_vid])
- e1000_vlan_rx_kill_vid(netdev, old_vid);
- }
- }
- }
- #endif
-
- int
- e1000_up(struct e1000_adapter *adapter)
- {
- struct net_device *netdev = adapter->netdev;
- int i, err;
- /* hardware has been reset, we need to reload some things */
- /* Reset the PHY if it was previously powered down */
- if(adapter->hw.media_type == e1000_media_type_copper) {
- uint16_t mii_reg;
- e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
- if(mii_reg & MII_CR_POWER_DOWN)
- e1000_phy_reset(&adapter->hw);
- }
- e1000_set_multi(netdev);
- #ifdef NETIF_F_HW_VLAN_TX
- e1000_restore_vlan(adapter);
- #endif
- e1000_configure_tx(adapter);
- e1000_setup_rctl(adapter);
- e1000_configure_rx(adapter);
- for (i = 0; i < adapter->num_queues; i++)
- adapter->alloc_rx_buf(adapter, &adapter->rx_ring[i]);
- #ifdef CONFIG_PCI_MSI
- if(adapter->hw.mac_type > e1000_82547_rev_2) {
- adapter->have_msi = TRUE;
- if((err = pci_enable_msi(adapter->pdev))) {
- DPRINTK(PROBE, ERR,
- "Unable to allocate MSI interrupt Error: %d\n", err);
- adapter->have_msi = FALSE;
- }
- }
- #endif
- if((err = request_irq(adapter->pdev->irq, &e1000_intr,
- SA_SHIRQ | SA_SAMPLE_RANDOM,
- netdev->name, netdev))) {
- DPRINTK(PROBE, ERR,
- "Unable to allocate interrupt Error: %d\n", err);
- return err;
- }
- mod_timer(&adapter->watchdog_timer, jiffies);
- #ifdef CONFIG_E1000_NAPI
- netif_poll_enable(netdev);
- #endif
- e1000_irq_enable(adapter);
- return 0;
- }
- void
- e1000_down(struct e1000_adapter *adapter)
- {
- struct net_device *netdev = adapter->netdev;
- e1000_irq_disable(adapter);
- #ifdef CONFIG_E1000_MQ
- while (atomic_read(&adapter->rx_sched_call_data.count) != 0);
- #endif
- free_irq(adapter->pdev->irq, netdev);
- #ifdef CONFIG_PCI_MSI
- if(adapter->hw.mac_type > e1000_82547_rev_2 &&
- adapter->have_msi == TRUE)
- pci_disable_msi(adapter->pdev);
- #endif
- del_timer_sync(&adapter->tx_fifo_stall_timer);
- del_timer_sync(&adapter->watchdog_timer);
- del_timer_sync(&adapter->phy_info_timer);
- #ifdef CONFIG_E1000_NAPI
- netif_poll_disable(netdev);
- #endif
- adapter->link_speed = 0;
- adapter->link_duplex = 0;
- netif_carrier_off(netdev);
- netif_stop_queue(netdev);
- e1000_reset(adapter);
- e1000_clean_all_tx_rings(adapter);
- e1000_clean_all_rx_rings(adapter);
- /* If WoL is not enabled and management mode is not IAMT
- * Power down the PHY so no link is implied when interface is down */
- if(!adapter->wol && adapter->hw.mac_type >= e1000_82540 &&
- adapter->hw.media_type == e1000_media_type_copper &&
- !e1000_check_mng_mode(&adapter->hw) &&
- !(E1000_READ_REG(&adapter->hw, MANC) & E1000_MANC_SMBUS_EN)) {
- uint16_t mii_reg;
- e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
- mii_reg |= MII_CR_POWER_DOWN;
- e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
- mdelay(1);
- }
- }
- void
- e1000_reset(struct e1000_adapter *adapter)
- {
- struct net_device *netdev = adapter->netdev;
- uint32_t pba, manc;
- uint16_t fc_high_water_mark = E1000_FC_HIGH_DIFF;
- uint16_t fc_low_water_mark = E1000_FC_LOW_DIFF;
- /* Repartition Pba for greater than 9k mtu
- * To take effect CTRL.RST is required.
- */
- switch (adapter->hw.mac_type) {
- case e1000_82547:
- case e1000_82547_rev_2:
- pba = E1000_PBA_30K;
- break;
- case e1000_82571:
- case e1000_82572:
- pba = E1000_PBA_38K;
- break;
- case e1000_82573:
- pba = E1000_PBA_12K;
- break;
- default:
- pba = E1000_PBA_48K;
- break;
- }
- if((adapter->hw.mac_type != e1000_82573) &&
- (adapter->rx_buffer_len > E1000_RXBUFFER_8192)) {
- pba -= 8; /* allocate more FIFO for Tx */
- /* send an XOFF when there is enough space in the
- * Rx FIFO to hold one extra full size Rx packet
- */
- fc_high_water_mark = netdev->mtu + ENET_HEADER_SIZE +
- ETHERNET_FCS_SIZE + 1;
- fc_low_water_mark = fc_high_water_mark + 8;
- }
- if(adapter->hw.mac_type == e1000_82547) {
- adapter->tx_fifo_head = 0;
- adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
- adapter->tx_fifo_size =
- (E1000_PBA_40K - pba) << E1000_PBA_BYTES_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_PBA_BYTES_SHIFT) -
- fc_high_water_mark;
- adapter->hw.fc_low_water = (pba << E1000_PBA_BYTES_SHIFT) -
- fc_low_water_mark;
- adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
- adapter->hw.fc_send_xon = 1;
- adapter->hw.fc = adapter->hw.original_fc;
- /* Allow time for pending master requests to run */
- e1000_reset_hw(&adapter->hw);
- if(adapter->hw.mac_type >= e1000_82544)
- E1000_WRITE_REG(&adapter->hw, WUC, 0);
- if(e1000_init_hw(&adapter->hw))
- DPRINTK(PROBE, ERR, "Hardware Error\n");
- #ifdef NETIF_F_HW_VLAN_TX
- e1000_update_mng_vlan(adapter);
- #endif
- /* 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);
- if(adapter->en_mng_pt) {
- manc = E1000_READ_REG(&adapter->hw, MANC);
- manc |= (E1000_MANC_ARP_EN | E1000_MANC_EN_MNG2HOST);
- E1000_WRITE_REG(&adapter->hw, MANC, manc);
- }
- }
- /**
- * 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.
- **/
- #define SHOW_INTERFACE(d) printk("Interface mac_type=%d\n", d->hw.mac_type)
- static int __devinit
- e1000_probe(struct pci_dev *pdev,
- const struct pci_device_id *ent)
- {
- struct net_device *netdev;
- struct e1000_adapter *adapter;
- unsigned long mmio_start, mmio_len;
- uint32_t ctrl_ext;
- uint32_t swsm;
- static int cards_found = 0;
- int i, err, pci_using_dac;
- uint16_t eeprom_data;
- uint16_t eeprom_apme_mask = E1000_EEPROM_APME;
- 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);
- SET_NETDEV_DEV(netdev, &pdev->dev);
- pci_set_drvdata(pdev, netdev);
- adapter = netdev_priv(netdev);
- adapter->netdev = netdev;
- adapter->pdev = pdev;
- adapter->hw.back = adapter;
- adapter->msg_enable = (1 << debug) - 1;
- mmio_start = pci_resource_start(pdev, BAR_0);
- mmio_len = pci_resource_len(pdev, BAR_0);
- SHOW_INTERFACE(adapter);
- 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;
- set_ethtool_ops(netdev);
- #ifdef HAVE_TX_TIMEOUT
- netdev->tx_timeout = &e1000_tx_timeout;
- netdev->watchdog_timeo = 5 * HZ;
- #endif
- #ifdef CONFIG_E1000_NAPI
- netdev->poll = &e1000_clean;
- netdev->weight = 64;
- #endif
- #ifdef NETIF_F_HW_VLAN_TX
- 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;
- #endif
- /* Click - polling extensions */
- netdev->polling = 0;
- netdev->rx_poll = e1000_rx_poll;
- netdev->rx_refill = e1000_rx_refill;
- netdev->tx_queue = e1000_tx_pqueue;
- netdev->tx_eob = e1000_tx_eob;
- netdev->tx_start = e1000_tx_start;
- netdev->tx_clean = e1000_tx_clean;
- netdev->poll_off = e1000_poll_off;
- netdev->poll_on = e1000_poll_on;
- #ifdef CONFIG_NET_POLL_CONTROLLER
- netdev->poll_controller = e1000_netpoll;
- #endif
- strcpy(netdev->name, pci_name(pdev));
- 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((err = e1000_check_phy_reset_block(&adapter->hw)))
- DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
- #ifdef MAX_SKB_FRAGS
- if(adapter->hw.mac_type >= e1000_82543) {
- #ifdef NETIF_F_HW_VLAN_TX
- 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 | NETIF_F_HW_CSUM;
- #endif
- }
- #ifdef NETIF_F_TSO
- if((adapter->hw.mac_type >= e1000_82544) &&
- (adapter->hw.mac_type != e1000_82547))
- netdev->features |= NETIF_F_TSO;
- #ifdef NETIF_F_TSO_IPV6
- if(adapter->hw.mac_type > e1000_82547_rev_2)
- netdev->features |= NETIF_F_TSO_IPV6;
- #endif
- #endif
- if(pci_using_dac)
- netdev->features |= NETIF_F_HIGHDMA;
- #endif
- #ifdef NETIF_F_LLTX
- netdev->features |= NETIF_F_LLTX;
- #endif
- adapter->en_mng_pt = e1000_enable_mng_pass_thru(&adapter->hw);
- /* 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) {
- DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
- err = -EIO;
- goto err_eeprom;
- }
- /* copy the MAC address out of the EEPROM */
- if(e1000_read_mac_addr(&adapter->hw))
- DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
- memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
- SHOW_INTERFACE(adapter);
- if(!is_valid_ether_addr(netdev->dev_addr)) {
- DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
- 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_WORK(&adapter->tx_timeout_task,
- (void (*)(void *))e1000_tx_timeout_task, netdev);
- /* we're going to reset, so assume we have no link for now */
- netif_carrier_off(netdev);
- netif_stop_queue(netdev);
- 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_82544:
- e1000_read_eeprom(&adapter->hw,
- EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
- eeprom_apme_mask = E1000_EEPROM_82544_APM;
- 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 & eeprom_apme_mask)
- adapter->wol |= E1000_WUFC_MAG;
- /* reset the hardware with the new settings */
- e1000_reset(adapter);
- /* Let firmware know the driver has taken over */
- switch(adapter->hw.mac_type) {
- case e1000_82571:
- case e1000_82572:
- ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
- E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
- ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
- break;
- case e1000_82573:
- swsm = E1000_READ_REG(&adapter->hw, SWSM);
- E1000_WRITE_REG(&adapter->hw, SWSM,
- swsm | E1000_SWSM_DRV_LOAD);
- break;
- default:
- break;
- }
- strcpy(netdev->name, "eth%d");
- if((err = register_netdev(netdev)))
- goto err_register;
- DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
- cards_found++;
- return 0;
- err_register:
- err_sw_init:
- err_eeprom:
- iounmap(adapter->hw.hw_addr);
- err_ioremap:
- free_netdev(netdev);
- err_alloc_etherdev:
- pci_release_regions(pdev);
- return err;
- }
- /**
- * 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(netdev);
- uint32_t ctrl_ext;
- uint32_t manc, swsm;
- #ifdef CONFIG_E1000_NAPI
- int i;
- #endif
- 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);
- }
- }
- switch(adapter->hw.mac_type) {
- case e1000_82571:
- case e1000_82572:
- ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
- E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
- ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
- break;
- case e1000_82573:
- swsm = E1000_READ_REG(&adapter->hw, SWSM);
- E1000_WRITE_REG(&adapter->hw, SWSM,
- swsm & ~E1000_SWSM_DRV_LOAD);
- break;
- default:
- break;
- }
- unregister_netdev(netdev);
- #ifdef CONFIG_E1000_NAPI
- for (i = 0; i < adapter->num_queues; i++)
- __dev_put(&adapter->polling_netdev[i]);
- #endif
- if(!e1000_check_phy_reset_block(&adapter->hw))
- e1000_phy_hw_reset(&adapter->hw);
- kfree(adapter->tx_ring);
- kfree(adapter->rx_ring);
- #ifdef CONFIG_E1000_NAPI
- kfree(adapter->polling_netdev);
- #endif
- iounmap(adapter->hw.hw_addr);
- pci_release_regions(pdev);
- #ifdef CONFIG_E1000_MQ
- free_percpu(adapter->cpu_netdev);
- free_percpu(adapter->cpu_tx_ring);
- #endif
- 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;
- #ifdef CONFIG_E1000_NAPI
- int i;
- #endif
- /* 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;
- adapter->rx_ps_bsize0 = E1000_RXBUFFER_256;
- hw->max_frame_size = netdev->mtu +
- ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
- hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
- /* identify the MAC */
- if(hw->device_id == 0x10A0 || hw->device_id == 0x10A1) {
- DPRINTK(PROBE, INFO, "Setting MAC Type for Dewey Jones Beach Device\n");
- hw->mac_type = e1000_82571;
- }
- else if(e1000_set_mac_type(hw)) {
- DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
- return -EIO;
- }
- /* initialize eeprom parameters */
- if(e1000_init_eeprom_params(hw)) {
- E1000_ERR("EEPROM initialization failed\n");
- return -EIO;
- }
- switch(hw->mac_type) {
- default:
- break;
- case e1000_82541:
- case e1000_82547:
- case e1000_82541_rev_2:
- case e1000_82547_rev_2:
- hw->phy_init_script = 1;
- break;
- }
- e1000_set_media_type(hw);
- 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;
- }
- #ifdef CONFIG_E1000_MQ
- /* Number of supported queues */
- switch (hw->mac_type) {
- case e1000_82571:
- case e1000_82572:
- adapter->num_queues = 2;
- break;
- default:
- adapter->num_queues = 1;
- break;
- }
- adapter->num_queues = min(adapter->num_queues, num_online_cpus());
- #else
- adapter->num_queues = 1;
- #endif
- if (e1000_alloc_queues(adapter)) {
- DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
- return -ENOMEM;
- }
- #ifdef CONFIG_E1000_NAPI
- for (i = 0; i < adapter->num_queues; i++) {
- adapter->polling_netdev[i].priv = adapter;
- adapter->polling_netdev[i].poll = &e1000_clean;
- adapter->polling_netdev[i].weight = 64;
- dev_hold(&adapter->polling_netdev[i]);
- set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
- }
- #endif
- #ifdef CONFIG_E1000_MQ
- e1000_setup_queue_mapping(adapter);
- #endif
- atomic_set(&adapter->irq_sem, 1);
- spin_lock_init(&adapter->stats_lock);
- return 0;
- }
- /**
- * e1000_alloc_queues - Allocate memory for all rings
- * @adapter: board private structure to initialize
- *
- * We allocate one ring per queue at run-time since we don't know the
- * number of queues at compile-time. The polling_netdev array is
- * intended for Multiqueue, but should work fine with a single queue.
- **/
- static int __devinit
- e1000_alloc_queues(struct e1000_adapter *adapter)
- {
- int size;
- size = sizeof(struct e1000_tx_ring) * adapter->num_queues;
- adapter->tx_ring = kmalloc(size, GFP_KERNEL);
- if (!adapter->tx_ring)
- return -ENOMEM;
- memset(adapter->tx_ring, 0, size);
- size = sizeof(struct e1000_rx_ring) * adapter->num_queues;
- adapter->rx_ring = kmalloc(size, GFP_KERNEL);
- if (!adapter->rx_ring) {
- kfree(adapter->tx_ring);
- return -ENOMEM;
- }
- memset(adapter->rx_ring, 0, size);
- #ifdef CONFIG_E1000_NAPI
- size = sizeof(struct net_device) * adapter->num_queues;
- adapter->polling_netdev = kmalloc(size, GFP_KERNEL);
- if (!adapter->polling_netdev) {
- kfree(adapter->tx_ring);
- kfree(adapter->rx_ring);
- return -ENOMEM;
- }
- memset(adapter->polling_netdev, 0, size);
- #endif
- return E1000_SUCCESS;
- }
- #ifdef CONFIG_E1000_MQ
- static void __devinit
- e1000_setup_queue_mapping(struct e1000_adapter *adapter)
- {
- int i, cpu;
- adapter->rx_sched_call_data.func = e1000_rx_schedule;
- adapter->rx_sched_call_data.info = adapter->netdev;
- cpus_clear(adapter->rx_sched_call_data.cpumask);
- adapter->cpu_netdev = alloc_percpu(struct net_device *);
- adapter->cpu_tx_ring = alloc_percpu(struct e1000_tx_ring *);
- lock_cpu_hotplug();
- i = 0;
- for_each_online_cpu(cpu) {
- *per_cpu_ptr(adapter->cpu_tx_ring, cpu) = &adapter->tx_ring[i % adapter->num_queues];
- /* This is incomplete because we'd like to assign separate
- * physical cpus to these netdev polling structures and
- * avoid saturating a subset of cpus.
- */
- if (i < adapter->num_queues) {
- *per_cpu_ptr(adapter->cpu_netdev, cpu) = &adapter->polling_netdev[i];
- adapter->cpu_for_queue[i] = cpu;
- } else
- *per_cpu_ptr(adapter->cpu_netdev, cpu) = NULL;
- i++;
- }
- unlock_cpu_hotplug();
- }
- #endif
- /**
- * 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(netdev);
- int err;
- /* allocate transmit descriptors */
- if ((err = e1000_setup_all_tx_resources(adapter)))
- goto err_setup_tx;
- /* allocate receive descriptors */
- if ((err = e1000_setup_all_rx_resources(adapter)))
- goto err_setup_rx;
- if ((err = e1000_up(adapter)))
- goto err_up;
- #ifdef NETIF_F_HW_VLAN_TX
- adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
- if ((adapter->hw.mng_cookie.status &
- E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
- e1000_update_mng_vlan(adapter);
- }
- #endif
- return E1000_SUCCESS;
- err_up:
- e1000_free_all_rx_resources(adapter);
- err_setup_rx:
- e1000_free_all_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(netdev);
- e1000_down(adapter);
- e1000_free_all_tx_resources(adapter);
- e1000_free_all_rx_resources(adapter);
- #ifdef NETIF_F_HW_VLAN_TX
- if((adapter->hw.mng_cookie.status &
- E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
- e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
- }
- #endif
- return 0;
- }
- /**
- * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
- * @adapter: address of board private structure
- * @start: address of beginning of memory
- * @len: length of memory
- **/
- static inline boolean_t
- e1000_check_64k_bound(struct e1000_adapter *adapter,
- void *start, unsigned long len)
- {
- unsigned long begin = (unsigned long) start;
- unsigned long end = begin + len;
- /* First rev 82545 and 82546 need to not allow any memory
- * write location to cross 64k boundary due to errata 23 */
- if(adapter->hw.mac_type == e1000_82545 ||
- adapter->hw.mac_type == e1000_82546) {
- return ((begin ^ (end - 1)) >> 16) != 0 ? FALSE : TRUE;
- }
- return TRUE;
- }
- /**
- * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
- * @adapter: board private structure
- * @txdr: tx descriptor ring (for a specific queue) to setup
- *
- * Return 0 on success, negative on failure
- **/
- int
- e1000_setup_tx_resources(struct e1000_adapter *adapter,
- struct e1000_tx_ring *txdr)
- {
- struct pci_dev *pdev = adapter->pdev;
- int size;
- size = sizeof(struct e1000_buffer) * txdr->count;
- txdr->buffer_info = vmalloc(size);
- if (!txdr->buffer_info) {
- DPRINTK(PROBE, ERR,
- "Unable to allocate memory for the transmit descriptor ring\n");
- return -ENOMEM;
- }
- memset(txdr->buffer_info, 0, size);
- memset(&txdr->previous_buffer_info, 0, sizeof(struct e1000_buffer));
- /* 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) {
- setup_tx_desc_die:
- vfree(txdr->buffer_info);
- DPRINTK(PROBE, ERR,
- "Unable to allocate memory for the transmit descriptor ring\n");
- return -ENOMEM;
- }
- /* Fix for errata 23, can't cross 64kB boundary */
- if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
- void *olddesc = txdr->desc;
- dma_addr_t olddma = txdr->dma;
- DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
- "at %p\n", txdr->size, txdr->desc);
- /* Try again, without freeing the previous */
- txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
- /* Failed allocation, critical failure */
- if (!txdr->desc) {
- pci_free_consistent(pdev, txdr->size, olddesc, olddma);
- goto setup_tx_desc_die;
- }
- if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
- /* give up */
- pci_free_consistent(pdev, txdr->size, txdr->desc,
- txdr->dma);
- pci_free_consistent(pdev, txdr->size, olddesc, olddma);
- DPRINTK(PROBE, ERR,
- "Unable to allocate aligned memory "
- "for the transmit descriptor ring\n");
- vfree(txdr->buffer_info);
- return -ENOMEM;
- } else {
- /* Free old allocation, new allocation was successful */
- pci_free_consistent(pdev, txdr->size, olddesc, olddma);
- }
- }
- memset(txdr->desc, 0, txdr->size);
- txdr->next_to_use = 0;
- txdr->next_to_clean = 0;
- spin_lock_init(&txdr->tx_lock);
- return 0;
- }
- /**
- * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
- * (Descriptors) for all queues
- * @adapter: board private structure
- *
- * If this function returns with an error, then it's possible one or
- * more of the rings is populated (while the rest are not). It is the
- * callers duty to clean those orphaned rings.
- *
- * Return 0 on success, negative on failure
- **/
- int
- e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
- {
- int i, err = 0;
- for (i = 0; i < adapter->num_queues; i++) {
- err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
- if (err) {
- DPRINTK(PROBE, ERR,
- "Allocation for Tx Queue %u failed\n", i);
- break;
- }
- }
- return err;
- }
- /**
- * 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;
- struct e1000_hw *hw = &adapter->hw;
- uint32_t tdlen, tctl, tipg, tarc;
- /* Setup the HW Tx Head and Tail descriptor pointers */
- switch (adapter->num_queues) {
- case 2:
- tdba = adapter->tx_ring[1].dma;
- tdlen = adapter->tx_ring[1].count *
- sizeof(struct e1000_tx_desc);
- E1000_WRITE_REG(hw, TDBAL1, (tdba & 0x00000000ffffffffULL));
- E1000_WRITE_REG(hw, TDBAH1, (tdba >> 32));
- E1000_WRITE_REG(hw, TDLEN1, tdlen);
- E1000_WRITE_REG(hw, TDH1, 0);
- E1000_WRITE_REG(hw, TDT1, 0);
- adapter->tx_ring[1].tdh = E1000_TDH1;
- adapter->tx_ring[1].tdt = E1000_TDT1;
- /* Fall Through */
- case 1:
- default:
- tdba = adapter->tx_ring[0].dma;
- tdlen = adapter->tx_ring[0].count *
- sizeof(struct e1000_tx_desc);
- E1000_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
- E1000_WRITE_REG(hw, TDBAH, (tdba >> 32));
- E1000_WRITE_REG(hw, TDLEN, tdlen);
- E1000_WRITE_REG(hw, TDH, 0);
- E1000_WRITE_REG(hw, TDT, 0);
- adapter->tx_ring[0].tdh = E1000_TDH;
- adapter->tx_ring[0].tdt = E1000_TDT;
- break;
- }
- /* Set the default values for the Tx Inter Packet Gap timer */
- switch (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 (hw->media_type == e1000_media_type_fiber ||
- 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(hw, TIPG, tipg);
- /* Set the Tx Interrupt Delay register */
- E1000_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
- if (hw->mac_type >= e1000_82540)
- E1000_WRITE_REG(hw, TADV, adapter->tx_abs_int_delay);
- /* Program the Transmit Control Register */
- tctl = E1000_READ_REG(hw, TCTL);
- tctl &= ~E1000_TCTL_CT;
- tctl |= E1000_TCTL_EN | E1000_TCTL_PSP | E1000_TCTL_RTLC |
- (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
- E1000_WRITE_REG(hw, TCTL, tctl);
- if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
- tarc = E1000_READ_REG(hw, TARC0);
- /* disabled bit 21 to fix network problems when forced to 100/10 Mbps */
- tarc |= (1 << 25);
- E1000_WRITE_REG(hw, TARC0, tarc);
- tarc = E1000_READ_REG(hw, TARC1);
- tarc |= (1 << 25);
- if (tctl & E1000_TCTL_MULR)
- tarc &= ~(1 << 28);
- else
- tarc |= (1 << 28);
- E1000_WRITE_REG(hw, TARC1, tarc);
- }
- e1000_config_collision_dist(hw);
- /* Setup Transmit Descriptor Settings for eop descriptor */
- adapter->txd_cmd = E1000_TXD_CMD_IDE | E1000_TXD_CMD_EOP |
- E1000_TXD_CMD_IFCS;
- if (hw->mac_type < e1000_82543)
- adapter->txd_cmd |= E1000_TXD_CMD_RPS;
- else
- adapter->txd_cmd |= E1000_TXD_CMD_RS;
- /* Cache if we're 82544 running in PCI-X because we'll
- * need this to apply a workaround later in the send path. */
- if (hw->mac_type == e1000_82544 &&
- hw->bus_type == e1000_bus_type_pcix)
- adapter->pcix_82544 = 1;
- }
- /**
- * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
- * @adapter: board private structure
- * @rxdr: rx descriptor ring (for a specific queue) to setup
- *
- * Returns 0 on success, negative on failure
- **/
- int
- e1000_setup_rx_resources(struct e1000_adapter *adapter,
- struct e1000_rx_ring *rxdr)
- {
- struct pci_dev *pdev = adapter->pdev;
- int size, desc_len;
- size = sizeof(struct e1000_buffer) * rxdr->count;
- rxdr->buffer_info = vmalloc(size);
- if (!rxdr->buffer_info) {
- DPRINTK(PROBE, ERR,
- "Unable to allocate memory for the receive descriptor ring\n");
- return -ENOMEM;
- }
- memset(rxdr->buffer_info, 0, size);
- size = sizeof(struct e1000_ps_page) * rxdr->count;
- rxdr->ps_page = kmalloc(size, GFP_KERNEL);
- if (!rxdr->ps_page) {
- vfree(rxdr->buffer_info);
- DPRINTK(PROBE, ERR,
- "Unable to allocate memory for the receive descriptor ring\n");
- return -ENOMEM;
- }
- memset(rxdr->ps_page, 0, size);
- size = sizeof(struct e1000_ps_page_dma) * rxdr->count;
- rxdr->ps_page_dma = kmalloc(size, GFP_KERNEL);
- if (!rxdr->ps_page_dma) {
- vfree(rxdr->buffer_info);
- kfree(rxdr->ps_page);
- DPRINTK(PROBE, ERR,
- "Unable to allocate memory for the receive descriptor ring\n");
- return -ENOMEM;
- }
- memset(rxdr->ps_page_dma, 0, size);
- if (adapter->hw.mac_type <= e1000_82547_rev_2)
- desc_len = sizeof(struct e1000_rx_desc);
- else
- desc_len = sizeof(union e1000_rx_desc_packet_split);
- /* Round up to nearest 4K */
- rxdr->size = rxdr->count * desc_len;
- E1000_ROUNDUP(rxdr->size, 4096);
- rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
- if (!rxdr->desc) {
- DPRINTK(PROBE, ERR,
- "Unable to allocate memory for the receive descriptor ring\n");
- setup_rx_desc_die:
- vfree(rxdr->buffer_info);
- kfree(rxdr->ps_page);
- kfree(rxdr->ps_page_dma);
- return -ENOMEM;
- }
- /* Fix for errata 23, can't cross 64kB boundary */
- if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
- void *olddesc = rxdr->desc;
- dma_addr_t olddma = rxdr->dma;
- DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
- "at %p\n", rxdr->size, rxdr->desc);
- /* Try again, without freeing the previous */
- rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
- /* Failed allocation, critical failure */
- if (!rxdr->desc) {
- pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
- DPRINTK(PROBE, ERR,
- "Unable to allocate memory "
- "for the receive descriptor ring\n");
- goto setup_rx_desc_die;
- }
- if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
- /* give up */
- pci_free_consistent(pdev, rxdr->size, rxdr->desc,
- rxdr->dma);
- pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
- DPRINTK(PROBE, ERR,
- "Unable to allocate aligned memory "
- "for the receive descriptor ring\n");
- goto setup_rx_desc_die;
- } else {
- /* Free old allocation, new allocation was successful */
- pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
- }
- }
- memset(rxdr->desc, 0, rxdr->size);
- rxdr->next_to_clean = 0;
- rxdr->next_to_use = 0;
- return 0;
- }
- /**
- * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
- * (Descriptors) for all queues
- * @adapter: board private structure
- *
- * If this function returns with an error, then it's possible one or
- * more of the rings is populated (while the rest are not). It is the
- * callers duty to clean those orphaned rings.
- *
- * Return 0 on success, negative on failure
- **/
- int
- e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
- {
- int i, err = 0;
- for (i = 0; i < adapter->num_queues; i++) {
- err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
- if (err) {
- DPRINTK(PROBE, ERR,
- "Allocation for Rx Queue %u failed\n", i);
- break;
- }
- }
- return err;
- }
- /**
- * e1000_setup_rctl - configure the receive control registers
- * @adapter: Board private structure
- **/
- #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
- (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
- static void
- e1000_setup_rctl(struct e1000_adapter *adapter)
- {
- uint32_t rctl, rfctl;
- uint32_t psrctl = 0;
- #ifdef CONFIG_E1000_PACKET_SPLIT
- uint32_t pages = 0;
- #endif
- 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;
- if(adapter->netdev->mtu <= ETH_DATA_LEN)
- rctl &= ~E1000_RCTL_LPE;
- else
- rctl |= E1000_RCTL_LPE;
- /* Setup buffer sizes */
- if(adapter->hw.mac_type >= e1000_82571) {
- /* We can now specify buffers in 1K increments.
- * BSIZE and BSEX are ignored in this case. */
- rctl |= adapter->rx_buffer_len << 0x11;
- } else {
- rctl &= ~E1000_RCTL_SZ_4096;
- rctl |= E1000_RCTL_BSEX;
- switch (adapter->rx_buffer_len) {
- case E1000_RXBUFFER_2048:
- default:
- rctl |= E1000_RCTL_SZ_2048;
- rctl &= ~E1000_RCTL_BSEX;
- break;
- case E1000_RXBUFFER_4096:
- rctl |= E1000_RCTL_SZ_4096;
- break;
- case E1000_RXBUFFER_8192:
- rctl |= E1000_RCTL_SZ_8192;
- break;
- case E1000_RXBUFFER_16384:
- rctl |= E1000_RCTL_SZ_16384;
- break;
- }
- }
- #ifdef CONFIG_E1000_PACKET_SPLIT
- /* 82571 and greater support packet-split where the protocol
- * header is placed in skb->data and the packet data is
- * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
- * In the case of a non-split, skb->data is linearly filled,
- * followed by the page buffers. Therefore, skb->data is
- * sized to hold the largest protocol header.
- */
- pages = PAGE_USE_COUNT(adapter->netdev->mtu);
- if ((adapter->hw.mac_type > e1000_82547_rev_2) && (pages <= 3) &&
- PAGE_SIZE <= 16384)
- adapter->rx_ps_pages = pages;
- else
- adapter->rx_ps_pages = 0;
- #endif
- if (adapter->rx_ps_pages) {
- /* Configure extra packet-split registers */
- rfctl = E1000_READ_REG(&adapter->hw, RFCTL);
- rfctl |= E1000_RFCTL_EXTEN;
- /* disable IPv6 packet split support */
- rfctl |= E1000_RFCTL_IPV6_DIS;
- E1000_WRITE_REG(&adapter->hw, RFCTL, rfctl);
- rctl |= E1000_RCTL_DTYP_PS | E1000_RCTL_SECRC;
-
- psrctl |= adapter->rx_ps_bsize0 >>
- E1000_PSRCTL_BSIZE0_SHIFT;
- switch (adapter->rx_ps_pages) {
- case 3:
- psrctl |= PAGE_SIZE <<
- E1000_PSRCTL_BSIZE3_SHIFT;
- case 2:
- psrctl |= PAGE_SIZE <<
- E1000_PSRCTL_BSIZE2_SHIFT;
- case 1:
- psrctl |= PAGE_SIZE >>
- E1000_PSRCTL_BSIZE1_SHIFT;
- break;
- }
- E1000_WRITE_REG(&adapter->hw, PSRCTL, psrctl);
- }
- 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;
- struct e1000_hw *hw = &adapter->hw;
- uint32_t rdlen, rctl, rxcsum, ctrl_ext;
- #ifdef CONFIG_E1000_MQ
- uint32_t reta, mrqc;
- int i;
- #endif
- if (adapter->rx_ps_pages) {
- rdlen = adapter->rx_ring[0].count *
- sizeof(union e1000_rx_desc_packet_split);
- adapter->clean_rx = e1000_clean_rx_irq_ps;
- adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
- } else {
- rdlen = adapter->rx_ring[0].count *
- sizeof(struct e1000_rx_desc);
- adapter->clean_rx = e1000_clean_rx_irq;
- adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
- }
- /* disable receives while setting up the descriptors */
- rctl = E1000_READ_REG(hw, RCTL);
- E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
- /* set the Receive Delay Timer Register */
- E1000_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
- if (hw->mac_type >= e1000_82540) {
- E1000_WRITE_REG(hw, RADV, adapter->rx_abs_int_delay);
- if(adapter->itr > 1)
- E1000_WRITE_REG(hw, ITR,
- 1000000000 / (adapter->itr * 256));
- }
- if (hw->mac_type >= e1000_82571) {
- /* Reset delay timers after every interrupt */
- ctrl_ext = E1000_READ_REG(hw, CTRL_EXT);
- ctrl_ext |= E1000_CTRL_EXT_CANC;
- E1000_WRITE_REG(hw, CTRL_EXT, ctrl_ext);
- E1000_WRITE_FLUSH(hw);
- }
- /* Setup the HW Rx Head and Tail Descriptor Pointers and
- * the Base and Length of the Rx Descriptor Ring */
- switch (adapter->num_queues) {
- #ifdef CONFIG_E1000_MQ
- case 2:
- rdba = adapter->rx_ring[1].dma;
- E1000_WRITE_REG(hw, RDBAL1, (rdba & 0x00000000ffffffffULL));
- E1000_WRITE_REG(hw, RDBAH1, (rdba >> 32));
- E1000_WRITE_REG(hw, RDLEN1, rdlen);
- E1000_WRITE_REG(hw, RDH1, 0);
- E1000_WRITE_REG(hw, RDT1, 0);
- adapter->rx_ring[1].rdh = E1000_RDH1;
- adapter->rx_ring[1].rdt = E1000_RDT1;
- /* Fall Through */
- #endif
- case 1:
- default:
- rdba = adapter->rx_ring[0].dma;
- E1000_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
- E1000_WRITE_REG(hw, RDBAH, (rdba >> 32));
- E1000_WRITE_REG(hw, RDLEN, rdlen);
- E1000_WRITE_REG(hw, RDH, 0);
- E1000_WRITE_REG(hw, RDT, 0);
- adapter->rx_ring[0].rdh = E1000_RDH;
- adapter->rx_ring[0].rdt = E1000_RDT;
- break;
- }
- #ifdef CONFIG_E1000_MQ
- if (adapter->num_queues > 1) {
- uint32_t random[10];
- get_random_bytes(&random[0], 40);
- if (hw->mac_type <= e1000_82572) {
- E1000_WRITE_REG(hw, RSSIR, 0);
- E1000_WRITE_REG(hw, RSSIM, 0);
- }
- switch (adapter->num_queues) {
- case 2:
- default:
- reta = 0x00800080;
- mrqc = E1000_MRQC_ENABLE_RSS_2Q;
- break;
- }
- /* Fill out redirection table */
- for (i = 0; i < 32; i++)
- E1000_WRITE_REG_ARRAY(hw, RETA, i, reta);
- /* Fill out hash function seeds */
- for (i = 0; i < 10; i++)
- E1000_WRITE_REG_ARRAY(hw, RSSRK, i, random[i]);
- mrqc |= (E1000_MRQC_RSS_FIELD_IPV4 |
- E1000_MRQC_RSS_FIELD_IPV4_TCP);
- E1000_WRITE_REG(hw, MRQC, mrqc);
- }
- /* Multiqueue and packet checksumming are mutually exclusive. */
- if (hw->mac_type >= e1000_82571) {
- rxcsum = E1000_READ_REG(hw, RXCSUM);
- rxcsum |= E1000_RXCSUM_PCSD;
- E1000_WRITE_REG(hw, RXCSUM, rxcsum);
- }
- #else
- /* Enable 82543 Receive Checksum Offload for TCP and UDP */
- if (hw->mac_type >= e1000_82543) {
- rxcsum = E1000_READ_REG(hw, RXCSUM);
- if(adapter->rx_csum == TRUE) {
- rxcsum |= E1000_RXCSUM_TUOFL;
- /* Enable 82571 IPv4 payload checksum for UDP fragments
- * Must be used in conjunction with packet-split. */
- if ((hw->mac_type >= e1000_82571) &&
- (adapter->rx_ps_pages)) {
- rxcsum |= E1000_RXCSUM_IPPCSE;
- }
- } else {
- rxcsum &= ~E1000_RXCSUM_TUOFL;
- /* don't need to clear IPPCSE as it defaults to 0 */
- }
- E1000_WRITE_REG(hw, RXCSUM, rxcsum);
- }
- #endif /* CONFIG_E1000_MQ */
- if (hw->mac_type == e1000_82573)
- E1000_WRITE_REG(hw, ERT, 0x0100);
- /* Enable Receives */
- E1000_WRITE_REG(hw, RCTL, rctl);
- }
- /**
- * e1000_free_tx_resources - Free Tx Resources per Queue
- * @adapter: board private structure
- * @tx_ring: Tx descriptor ring for a specific queue
- *
- * Free all transmit software resources
- **/
- void
- e1000_free_tx_resources(struct e1000_adapter *adapter,
- struct e1000_tx_ring *tx_ring)
- {
- struct pci_dev *pdev = adapter->pdev;
- e1000_clean_tx_ring(adapter, tx_ring);
- vfree(tx_ring->buffer_info);
- tx_ring->buffer_info = NULL;
- pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
- tx_ring->desc = NULL;
- }
- /**
- * e1000_free_all_tx_resources - Free Tx Resources for All Queues
- * @adapter: board private structure
- *
- * Free all transmit software resources
- **/
- void
- e1000_free_all_tx_resources(struct e1000_adapter *adapter)
- {
- int i;
- for (i = 0; i < adapter->num_queues; i++)
- e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
- }
- static inline void
- e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
- struct e1000_buffer *buffer_info)
- {
- if(buffer_info->dma) {
- pci_unmap_page(adapter->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;
- }
- }
- /**
- * e1000_clean_tx_ring - Free Tx Buffers
- * @adapter: board private structure
- * @tx_ring: ring to be cleaned
- **/
- static void
- e1000_clean_tx_ring(struct e1000_adapter *adapter,
- struct e1000_tx_ring *tx_ring)
- {
- struct e1000_buffer *buffer_info;
- unsigned long size;
- unsigned int i;
- /* Free all the Tx ring sk_buffs */
- if (likely(tx_ring->previous_buffer_info.skb != NULL)) {
- e1000_unmap_and_free_tx_resource(adapter,
- &tx_ring->previous_buffer_info);
- }
- for (i = 0; i < tx_ring->count; i++) {
- buffer_info = &tx_ring->buffer_info[i];
- e1000_unmap_and_free_tx_resource(adapter, buffer_info);
- }
- 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;
- writel(0, adapter->hw.hw_addr + tx_ring->tdh);
- writel(0, adapter->hw.hw_addr + tx_ring->tdt);
- }
- /**
- * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
- * @adapter: board private structure
- **/
- static void
- e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
- {
- int i;
- for (i = 0; i < adapter->num_queues; i++)
- e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
- }
- /**
- * e1000_free_rx_resources - Free Rx Resources
- * @adapter: board private structure
- * @rx_ring: ring to clean the resources from
- *
- * Free all receive software resources
- **/
- void
- e1000_free_rx_resources(struct e1000_adapter *adapter,
- struct e1000_rx_ring *rx_ring)
- {
- struct pci_dev *pdev = adapter->pdev;
- e1000_clean_rx_ring(adapter, rx_ring);
- vfree(rx_ring->buffer_info);
- rx_ring->buffer_info = NULL;
- kfree(rx_ring->ps_page);
- rx_ring->ps_page = NULL;
- kfree(rx_ring->ps_page_dma);
- rx_ring->ps_page_dma = NULL;
- pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
- rx_ring->desc = NULL;
- }
- /**
- * e1000_free_all_rx_resources - Free Rx Resources for All Queues
- * @adapter: board private structure
- *
- * Free all receive software resources
- **/
- void
- e1000_free_all_rx_resources(struct e1000_adapter *adapter)
- {
- int i;
- for (i = 0; i < adapter->num_queues; i++)
- e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
- }
- /**
- * e1000_clean_rx_ring - Free Rx Buffers per Queue
- * @adapter: board private structure
- * @rx_ring: ring to free buffers from
- **/
- static void
- e1000_clean_rx_ring(struct e1000_adapter *adapter,
- struct e1000_rx_ring *rx_ring)
- {
- struct e1000_buffer *buffer_info;
- struct e1000_ps_page *ps_page;
- struct e1000_ps_page_dma *ps_page_dma;
- struct pci_dev *pdev = adapter->pdev;
- unsigned long size;
- unsigned int i, j;
- /* 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) {
- ps_page = &rx_ring->ps_page[i];
- ps_page_dma = &rx_ring->ps_page_dma[i];
- pci_unmap_single(pdev,
- buffer_info->dma,
- buffer_info->length,
- PCI_DMA_FROMDEVICE);
- dev_kfree_skb(buffer_info->skb);
- buffer_info->skb = NULL;
- for(j = 0; j < adapter->rx_ps_pages; j++) {
- if(!ps_page->ps_page[j]) break;
- pci_unmap_single(pdev,
- ps_page_dma->ps_page_dma[j],
- PAGE_SIZE, PCI_DMA_FROMDEVICE);
- ps_page_dma->ps_page_dma[j] = 0;
- put_page(ps_page->ps_page[j]);
- ps_page->ps_page[j] = NULL;
- }
- }
- }
- size = sizeof(struct e1000_buffer) * rx_ring->count;
- memset(rx_ring->buffer_info, 0, size);
- size = sizeof(struct e1000_ps_page) * rx_ring->count;
- memset(rx_ring->ps_page, 0, size);
- size = sizeof(struct e1000_ps_page_dma) * rx_ring->count;
- memset(rx_ring->ps_page_dma, 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;
- writel(0, adapter->hw.hw_addr + rx_ring->rdh);
- writel(0, adapter->hw.hw_addr + rx_ring->rdt);
- }
- /**
- * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
- * @adapter: board private structure
- **/
- static void
- e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
- {
- int i;
- for (i = 0; i < adapter->num_queues; i++)
- e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
- }
- /* 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_all_rx_rings(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, &adapter->rx_ring[0]);
- }
- }
- /**
- * 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(netdev);
- 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);
- /* With 82571 controllers, LAA may be overwritten (with the default)
- * due to controller reset from the other port. */
- if (adapter->hw.mac_type == e1000_82571) {
- /* activate the work around */
- adapter->hw.laa_is_present = 1;
- /* Hold a copy of the LAA in RAR[14] This is done so that
- * between the time RAR[0] gets clobbered and the time it
- * gets fixed (in e1000_watchdog), the actual LAA is in one
- * of the RARs and no incoming packets directed to this port
- * are dropped. Eventaully the LAA will be in RAR[0] and
- * RAR[14] */
- e1000_rar_set(&adapter->hw, adapter->hw.mac_addr,
- E1000_RAR_ENTRIES - 1);
- }
- 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(netdev);
- struct e1000_hw *hw = &adapter->hw;
- struct dev_mc_list *mc_ptr;
- uint32_t rctl;
- uint32_t hash_value;
- int i, rar_entries = E1000_RAR_ENTRIES;
- /* reserve RAR[14] for LAA over-write work-around */
- if (adapter->hw.mac_type == e1000_82571)
- rar_entries--;
- /* 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
- * -- with 82571 controllers only 0-13 entries are filled here
- */
- mc_ptr = netdev->mc_list;
- for (i = 1; i < 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 adapter cast into an unsigned long
- **/
- static void
- e1000_watchdog(unsigned long data)
- {
- struct e1000_adapter *adapter = (struct e1000_adapter *) data;
- if(adapter->netdev->polling){
- adapter->do_poll_watchdog = 1;
- } else {
- e1000_watchdog_1(adapter);
- }
- mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
- }
- static void
- e1000_watchdog_1(struct e1000_adapter *adapter)
- {
- struct net_device *netdev = adapter->netdev;
- struct e1000_tx_ring *txdr = &adapter->tx_ring[0];
- uint32_t link;
- e1000_check_for_link(&adapter->hw);
- if (adapter->hw.mac_type == e1000_82573) {
- e1000_enable_tx_pkt_filtering(&adapter->hw);
- #ifdef NETIF_F_HW_VLAN_TX
- if (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id)
- e1000_update_mng_vlan(adapter);
- #endif
- }
- 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);
- DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s\n",
- 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;
- DPRINTK(LINK, INFO, "NIC Link is Down\n");
- 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 (adapter->num_queues == 1 && !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_work(&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);
- /* Force detection of hung controller every watchdog period */
- adapter->detect_tx_hung = TRUE;
- /* With 82571 controllers, LAA may be overwritten due to controller
- * reset from the other port. Set the appropriate LAA in RAR[0] */
- if (adapter->hw.mac_type == e1000_82571 && adapter->hw.laa_is_present)
- e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
- }
- #define E1000_TX_FLAGS_CSUM 0x00000001
- #define E1000_TX_FLAGS_VLAN 0x00000002
- #define E1000_TX_FLAGS_TSO 0x00000004
- #define E1000_TX_FLAGS_IPV4 0x00000008
- #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
- #define E1000_TX_FLAGS_VLAN_SHIFT 16
- static inline int
- e1000_tso(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
- struct sk_buff *skb)
- {
- #ifdef NETIF_F_TSO
- struct e1000_context_desc *context_desc;
- unsigned int i;
- uint32_t cmd_length = 0;
- uint16_t ipcse = 0, tucse, mss;
- uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
- int err;
- if (skb_shinfo(skb)->tso_size) {
- if (skb_header_cloned(skb)) {
- err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
- if (err)
- return err;
- }
- hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
- mss = skb_shinfo(skb)->tso_size;
- if (skb->protocol == ntohs(ETH_P_IP)) {
- 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);
- cmd_length = E1000_TXD_CMD_IP;
- ipcse = skb->h.raw - skb->data - 1;
- #ifdef NETIF_F_TSO_IPV6
- } else if (skb->protocol == ntohs(ETH_P_IPV6)) {
- skb->nh.ipv6h->payload_len = 0;
- skb->h.th->check =
- ~csum_ipv6_magic(&skb->nh.ipv6h->saddr,
- &skb->nh.ipv6h->daddr,
- 0,
- IPPROTO_TCP,
- 0);
- ipcse = 0;
- #endif
- }
- ipcss = skb->nh.raw - skb->data;
- ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data;
- tucss = skb->h.raw - skb->data;
- tucso = (void *)&(skb->h.th->check) - (void *)skb->data;
- tucse = 0;
- cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
- E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
- i = tx_ring->next_to_use;
- context_desc = E1000_CONTEXT_DESC(*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(cmd_length);
- if (++i == tx_ring->count) i = 0;
- tx_ring->next_to_use = i;
- return TRUE;
- }
- #endif
- return FALSE;
- }
- static inline boolean_t
- e1000_tx_csum(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
- struct sk_buff *skb)
- {
- struct e1000_context_desc *context_desc;
- unsigned int i;
- uint8_t css;
- if (likely(skb->ip_summed == CHECKSUM_HW)) {
- css = skb->h.raw - skb->data;
- i = tx_ring->next_to_use;
- context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
- context_desc->upper_setup.tcp_fields.tucss = css;
- context_desc->upper_setup.tcp_fields.tucso = css + skb->csum;
- 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 (unlikely(++i == tx_ring->count)) i = 0;
- 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 e1000_tx_ring *tx_ring,
- struct sk_buff *skb, unsigned int first, unsigned int max_per_txd,
- unsigned int nr_frags, unsigned int mss)
- {
- struct e1000_buffer *buffer_info;
- unsigned int len = skb->len;
- unsigned int offset = 0, size, count = 0, i;
- #ifdef MAX_SKB_FRAGS
- unsigned int f;
- len -= skb->data_len;
- #endif
- 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(unlikely(mss && !nr_frags && size == len && size > 8))
- size -= 4;
- #endif
- /* work-around for errata 10 and it applies
- * to all controllers in PCI-X mode
- * The fix is to make sure that the first descriptor of a
- * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
- */
- if(unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
- (size > 2015) && count == 0))
- size = 2015;
-
- /* Workaround for potential 82544 hang in PCI-X. Avoid
- * terminating buffers within evenly-aligned dwords. */
- if(unlikely(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(unlikely(++i == tx_ring->count)) i = 0;
- }
- #ifdef MAX_SKB_FRAGS
- 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(unlikely(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(unlikely(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(unlikely(++i == tx_ring->count)) i = 0;
- }
- }
- #endif
- 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, struct e1000_tx_ring *tx_ring,
- int tx_flags, int count)
- {
- 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(likely(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_TXSM << 8;
- if(likely(tx_flags & E1000_TX_FLAGS_IPV4))
- txd_upper |= E1000_TXD_POPTS_IXSM << 8;
- }
- if(likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
- txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
- txd_upper |= E1000_TXD_POPTS_TXSM << 8;
- }
- if(unlikely(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(unlikely(++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;
- writel(i, adapter->hw.hw_addr + tx_ring->tdt);
- }
- /**
- * 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;
- }
- #define MINIMUM_DHCP_PACKET_SIZE 282
- static inline int
- e1000_transfer_dhcp_info(struct e1000_adapter *adapter, struct sk_buff *skb)
- {
- struct e1000_hw *hw = &adapter->hw;
- uint16_t length, offset;
- #ifdef NETIF_F_HW_VLAN_TX
- if(vlan_tx_tag_present(skb)) {
- if(!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
- ( adapter->hw.mng_cookie.status &
- E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
- return 0;
- }
- #endif
- if(htons(ETH_P_IP) == skb->protocol) {
- const struct iphdr *ip = skb->nh.iph;
- if(IPPROTO_UDP == ip->protocol) {
- struct udphdr *udp = (struct udphdr *)(skb->h.uh);
- if(ntohs(udp->dest) == 67) {
- offset = (uint8_t *)udp + 8 - skb->data;
- length = skb->len - offset;
- return e1000_mng_write_dhcp_info(hw,
- (uint8_t *)udp + 8, length);
- }
- }
- } else if((skb->len > MINIMUM_DHCP_PACKET_SIZE) && (!skb->protocol)) {
- struct ethhdr *eth = (struct ethhdr *) skb->data;
- if((htons(ETH_P_IP) == eth->h_proto)) {
- const struct iphdr *ip =
- (struct iphdr *)((uint8_t *)skb->data+14);
- if(IPPROTO_UDP == ip->protocol) {
- struct udphdr *udp =
- (struct udphdr *)((uint8_t *)ip +
- (ip->ihl << 2));
- if(ntohs(udp->dest) == 67) {
- offset = (uint8_t *)udp + 8 - skb->data;
- length = skb->len - offset;
- return e1000_mng_write_dhcp_info(hw,
- (uint8_t *)udp + 8,
- length);
- }
- }
- }
- }
- return 0;
- }
- #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
- static int
- e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
- {
- struct e1000_adapter *adapter = netdev_priv(netdev);
- struct e1000_tx_ring *tx_ring;
- unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
- unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
- unsigned int tx_flags = 0;
- unsigned int len = skb->len;
- unsigned long flags;
- unsigned int nr_frags = 0;
- unsigned int mss = 0;
- int count = 0;
- int tso;
- #ifdef MAX_SKB_FRAGS
- unsigned int f;
- len -= skb->data_len;
- #endif
- #ifdef CONFIG_E1000_MQ
- tx_ring = *per_cpu_ptr(adapter->cpu_tx_ring, smp_processor_id());
- #else
- tx_ring = adapter->tx_ring;
- #endif
- if (unlikely(skb->len <= 0)) {
- dev_kfree_skb_any(skb);
- return NETDEV_TX_OK;
- }
- #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);
- max_txd_pwr = fls(max_per_txd) - 1;
- }
- if((mss) || (skb->ip_summed == CHECKSUM_HW))
- count++;
- count++;
- #else
- if(skb->ip_summed == CHECKSUM_HW)
- count++;
- #endif
- count += TXD_USE_COUNT(len, max_txd_pwr);
- if(adapter->pcix_82544)
- count++;
- /* work-around for errata 10 and it applies to all controllers
- * in PCI-X mode, so add one more descriptor to the count
- */
- if(unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
- (len > 2015)))
- count++;
- #ifdef MAX_SKB_FRAGS
- nr_frags = skb_shinfo(skb)->nr_frags;
- for(f = 0; f < nr_frags; f++)
- count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
- max_txd_pwr);
- if(adapter->pcix_82544)
- count += nr_frags;
- #ifdef NETIF_F_TSO
- /* TSO Workaround for 82571/2 Controllers -- if skb->data
- * points to just header, pull a few bytes of payload from
- * frags into skb->data */
- if (skb_shinfo(skb)->tso_size) {
- uint8_t hdr_len;
- hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
- if (skb->data_len && (hdr_len < (skb->len - skb->data_len)) &&
- (adapter->hw.mac_type == e1000_82571 ||
- adapter->hw.mac_type == e1000_82572)) {
- unsigned int pull_size;
- pull_size = min((unsigned int)4, skb->data_len);
- if (!__pskb_pull_tail(skb, pull_size)) {
- printk(KERN_ERR "__pskb_pull_tail failed.\n");
- dev_kfree_skb_any(skb);
- return -EFAULT;
- }
- }
- }
- #endif
- #endif
- if(adapter->hw.tx_pkt_filtering && (adapter->hw.mac_type == e1000_82573) )
- e1000_transfer_dhcp_info(adapter, skb);
- #ifdef NETIF_F_LLTX
- local_irq_save(flags);
- if (!spin_trylock(&tx_ring->tx_lock)) {
- /* Collision - tell upper layer to requeue */
- local_irq_restore(flags);
- return NETDEV_TX_LOCKED;
- }
- #else
- spin_lock_irqsave(&tx_ring->tx_lock, flags);
- #endif
- /* need: count + 2 desc gap to keep tail from touching
- * head, otherwise try next time */
- if (unlikely(E1000_DESC_UNUSED(tx_ring) < count + 2)) {
- netif_stop_queue(netdev);
- spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
- return NETDEV_TX_BUSY;
- }
- if(unlikely(adapter->hw.mac_type == e1000_82547)) {
- if(unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
- netif_stop_queue(netdev);
- mod_timer(&adapter->tx_fifo_stall_timer, jiffies);
- spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
- return NETDEV_TX_BUSY;
- }
- }
- #ifndef NETIF_F_LLTX
- spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
- #endif
- #ifdef NETIF_F_HW_VLAN_TX
- if(unlikely(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);
- }
- #endif
- first = tx_ring->next_to_use;
-
- tso = e1000_tso(adapter, tx_ring, skb);
- if (tso < 0) {
- dev_kfree_skb_any(skb);
- #ifdef NETIF_F_LLTX
- spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
- #endif
- return NETDEV_TX_OK;
- }
- if (likely(tso))
- tx_flags |= E1000_TX_FLAGS_TSO;
- else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
- tx_flags |= E1000_TX_FLAGS_CSUM;
- /* Old method was to assume IPv4 packet by default if TSO was enabled.
- * 82571 hardware supports TSO capabilities for IPv6 as well...
- * no longer assume, we must. */
- if (likely(skb->protocol == ntohs(ETH_P_IP)))
- tx_flags |= E1000_TX_FLAGS_IPV4;
- e1000_tx_queue(adapter, tx_ring, tx_flags,
- e1000_tx_map(adapter, tx_ring, skb, first,
- max_per_txd, nr_frags, mss));
- netdev->trans_start = jiffies;
- #ifdef NETIF_F_LLTX
- /* Make sure there is space in the ring for the next send. */
- if (unlikely(E1000_DESC_UNUSED(tx_ring) < MAX_SKB_FRAGS + 2))
- netif_stop_queue(netdev);
- spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
- #endif
- return NETDEV_TX_OK;
- }
- /**
- * 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(netdev);
- /* Do the reset outside of interrupt context */
- schedule_work(&adapter->tx_timeout_task);
- }
- static void
- e1000_tx_timeout_task(struct net_device *netdev)
- {
- struct e1000_adapter *adapter = netdev_priv(netdev);
- e1000_down(adapter);
- e1000_up(adapter);
- }
- /**
- * 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(netdev);
- 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(netdev);
- int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
- if((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
- (max_frame > MAX_JUMBO_FRAME_SIZE)) {
- DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
- return -EINVAL;
- }
- #define MAX_STD_JUMBO_FRAME_SIZE 9234
- /* might want this to be bigger enum check... */
- /* 82571 controllers limit jumbo frame size to 10500 bytes */
- if ((adapter->hw.mac_type == e1000_82571 ||
- adapter->hw.mac_type == e1000_82572) &&
- max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
- DPRINTK(PROBE, ERR, "MTU > 9216 bytes not supported "
- "on 82571 and 82572 controllers.\n");
- return -EINVAL;
- }
- if(adapter->hw.mac_type == e1000_82573 &&
- max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
- DPRINTK(PROBE, ERR, "Jumbo Frames not supported "
- "on 82573\n");
- return -EINVAL;
- }
- if(adapter->hw.mac_type > e1000_82547_rev_2) {
- adapter->rx_buffer_len = max_frame;
- E1000_ROUNDUP(adapter->rx_buffer_len, 1024);
- } else {
- if(unlikely((adapter->hw.mac_type < e1000_82543) &&
- (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE))) {
- DPRINTK(PROBE, ERR, "Jumbo Frames not supported "
- "on 82542\n");
- return -EINVAL;
- } else {
- if(max_frame <= E1000_RXBUFFER_2048) {
- adapter->rx_buffer_len = E1000_RXBUFFER_2048;
- } 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 if(max_frame <= E1000_RXBUFFER_16384) {
- adapter->rx_buffer_len = E1000_RXBUFFER_16384;
- }
- }
- }
- netdev->mtu = new_mtu;
- if(netif_running(netdev)) {
- e1000_down(adapter);
- e1000_up(adapter);
- }
- 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);
- 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);
- }
- if(hw->mac_type > e1000_82547_rev_2) {
- adapter->stats.iac += E1000_READ_REG(hw, IAC);
- adapter->stats.icrxoc += E1000_READ_REG(hw, ICRXOC);
- adapter->stats.icrxptc += E1000_READ_REG(hw, ICRXPTC);
- adapter->stats.icrxatc += E1000_READ_REG(hw, ICRXATC);
- adapter->stats.ictxptc += E1000_READ_REG(hw, ICTXPTC);
- adapter->stats.ictxatc += E1000_READ_REG(hw, ICTXATC);
- adapter->stats.ictxqec += E1000_READ_REG(hw, ICTXQEC);
- adapter->stats.ictxqmtc += E1000_READ_REG(hw, ICTXQMTC);
- adapter->stats.icrxdmtc += E1000_READ_REG(hw, ICRXDMTC);
- }
- /* 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.mpc +
- adapter->stats.cexterr;
- adapter->net_stats.rx_dropped = adapter->stats.mpc;
- 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);
- }
- #ifdef CONFIG_E1000_MQ
- void
- e1000_rx_schedule(void *data)
- {
- struct net_device *poll_dev, *netdev = data;
- struct e1000_adapter *adapter = netdev->priv;
- int this_cpu = get_cpu();
- poll_dev = *per_cpu_ptr(adapter->cpu_netdev, this_cpu);
- if (poll_dev == NULL) {
- put_cpu();
- return;
- }
- if (likely(netif_rx_schedule_prep(poll_dev)))
- __netif_rx_schedule(poll_dev);
- else
- e1000_irq_enable(adapter);
- put_cpu();
- }
- #endif
- /**
- * 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(netdev);
- struct e1000_hw *hw = &adapter->hw;
- uint32_t icr = E1000_READ_REG(hw, ICR);
- int i;
- if(unlikely(!icr))
- return IRQ_NONE; /* Not our interrupt */
- if(unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
- hw->get_link_status = 1;
- mod_timer(&adapter->watchdog_timer, jiffies);
- }
- #ifdef CONFIG_E1000_NAPI
- atomic_inc(&adapter->irq_sem);
- E1000_WRITE_REG(hw, IMC, ~0);
- E1000_WRITE_FLUSH(hw);
- #ifdef CONFIG_E1000_MQ
- if (atomic_read(&adapter->rx_sched_call_data.count) == 0) {
- cpu_set(adapter->cpu_for_queue[0],
- adapter->rx_sched_call_data.cpumask);
- for (i = 1; i < adapter->num_queues; i++) {
- cpu_set(adapter->cpu_for_queue[i],
- adapter->rx_sched_call_data.cpumask);
- atomic_inc(&adapter->irq_sem);
- }
- atomic_set(&adapter->rx_sched_call_data.count, i);
- smp_call_async_mask(&adapter->rx_sched_call_data);
- } else {
- printk("call_data.count == %u\n", atomic_read(&adapter->rx_sched_call_data.count));
- }
- #else
- if (likely(netif_rx_schedule_prep(&adapter->polling_netdev[0])))
- __netif_rx_schedule(&adapter->polling_netdev[0]);
- else
- e1000_irq_enable(adapter);
- #endif
- #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) {
- atomic_inc(&adapter->irq_sem);
- E1000_WRITE_REG(hw, IMC, ~0);
- }
- for (i = 0; i < E1000_MAX_INTR; i++)
- if(unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
- !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
- break;
- if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
- e1000_irq_enable(adapter);
- #endif
- #ifdef E1000_COUNT_ICR
- adapter->icr_txdw += icr & 0x01;
- icr >>= 1;
- adapter->icr_txqe += icr & 0x01;
- icr >>= 1;
- adapter->icr_lsc += icr & 0x01;
- icr >>= 1;
- adapter->icr_rxseq += icr & 0x01;
- icr >>= 1;
- adapter->icr_rxdmt += icr & 0x01;
- icr >>= 2;
- adapter->icr_rxo += icr & 0x01;
- icr >>= 1;
- adapter->icr_rxt += icr & 0x01;
- icr >>= 2;
- adapter->icr_mdac += icr & 0x01;
- icr >>= 1;
- adapter->icr_rxcfg += icr & 0x01;
- icr >>= 1;
- adapter->icr_gpi += icr & 0x01;
- #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 *poll_dev, int *budget)
- {
- struct e1000_adapter *adapter;
- int work_to_do = min(*budget, poll_dev->quota);
- int tx_cleaned, i = 0, work_done = 0;
- /* Must NOT use netdev_priv macro here. */
- adapter = poll_dev->priv;
- /* Keep link state information with original netdev */
- if (!netif_carrier_ok(adapter->netdev))
- goto quit_polling;
- while (poll_dev != &adapter->polling_netdev[i]) {
- i++;
- if (unlikely(i == adapter->num_queues))
- BUG();
- }
- tx_cleaned = e1000_clean_tx_irq(adapter, &adapter->tx_ring[i]);
- adapter->clean_rx(adapter, &adapter->rx_ring[i],
- &work_done, work_to_do);
- *budget -= work_done;
- poll_dev->quota -= work_done;
-
- /* If no Tx and not enough Rx work done, exit the polling mode */
- if((!tx_cleaned && (work_done == 0)) ||
- !netif_running(adapter->netdev)) {
- quit_polling:
- netif_rx_complete(poll_dev);
- e1000_irq_enable(adapter);
- return 0;
- }
- return 1;
- }
- #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_tx_ring *tx_ring)
- {
- struct net_device *netdev = adapter->netdev;
- struct e1000_tx_desc *tx_desc, *eop_desc;
- struct e1000_buffer *buffer_info;
- unsigned int i, eop;
- boolean_t cleaned = FALSE;
- i = tx_ring->next_to_clean;
- eop = tx_ring->buffer_info[i].next_to_watch;
- eop_desc = E1000_TX_DESC(*tx_ring, eop);
- while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
- /* Premature writeback of Tx descriptors clear (free buffers
- * and unmap pci_mapping) previous_buffer_info */
- if (likely(tx_ring->previous_buffer_info.skb != NULL)) {
- e1000_unmap_and_free_tx_resource(adapter,
- &tx_ring->previous_buffer_info);
- }
- for (cleaned = FALSE; !cleaned; ) {
- tx_desc = E1000_TX_DESC(*tx_ring, i);
- buffer_info = &tx_ring->buffer_info[i];
- cleaned = (i == eop);
- #ifdef NETIF_F_TSO
- if (!(netdev->features & NETIF_F_TSO)) {
- #endif
- e1000_unmap_and_free_tx_resource(adapter,
- buffer_info);
- #ifdef NETIF_F_TSO
- } else {
- if (cleaned) {
- memcpy(&tx_ring->previous_buffer_info,
- buffer_info,
- sizeof(struct e1000_buffer));
- memset(buffer_info, 0,
- sizeof(struct e1000_buffer));
- } else {
- e1000_unmap_and_free_tx_resource(
- adapter, buffer_info);
- }
- }
- #endif
- tx_desc->buffer_addr = 0;
- tx_desc->lower.data = 0;
- tx_desc->upper.data = 0;
- if (unlikely(++i == tx_ring->count)) i = 0;
- }
- tx_ring->pkt++;
-
- eop = tx_ring->buffer_info[i].next_to_watch;
- eop_desc = E1000_TX_DESC(*tx_ring, eop);
- }
- tx_ring->next_to_clean = i;
- spin_lock(&tx_ring->tx_lock);
- if (unlikely(cleaned && netif_queue_stopped(netdev) &&
- netif_carrier_ok(netdev)))
- netif_wake_queue(netdev);
- spin_unlock(&tx_ring->tx_lock);
- if (adapter->detect_tx_hung) {
- /* Detect a transmit hang in hardware, this serializes the
- * check with the clearing of time_stamp and movement of i */
- adapter->detect_tx_hung = FALSE;
- if (tx_ring->buffer_info[i].dma &&
- time_after(jiffies, tx_ring->buffer_info[i].time_stamp + HZ)
- && !(E1000_READ_REG(&adapter->hw, STATUS) &
- E1000_STATUS_TXOFF)) {
- /* detected Tx unit hang */
- i = tx_ring->next_to_clean;
- eop = tx_ring->buffer_info[i].next_to_watch;
- eop_desc = E1000_TX_DESC(*tx_ring, eop);
- DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
- " TDH <%x>\n"
- " TDT <%x>\n"
- " next_to_use <%x>\n"
- " next_to_clean <%x>\n"
- "buffer_info[next_to_clean]\n"
- " dma <%zx>\n"
- " time_stamp <%lx>\n"
- " next_to_watch <%x>\n"
- " jiffies <%lx>\n"
- " next_to_watch.status <%x>\n",
- readl(adapter->hw.hw_addr + tx_ring->tdh),
- readl(adapter->hw.hw_addr + tx_ring->tdt),
- tx_ring->next_to_use,
- i,
- (size_t)tx_ring->buffer_info[i].dma,
- tx_ring->buffer_info[i].time_stamp,
- eop,
- jiffies,
- eop_desc->upper.fields.status);
- netif_stop_queue(netdev);
- }
- }
- #ifdef NETIF_F_TSO
- if (unlikely(!(eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
- time_after(jiffies, tx_ring->previous_buffer_info.time_stamp + HZ)))
- e1000_unmap_and_free_tx_resource(
- adapter, &tx_ring->previous_buffer_info);
- #endif
- return cleaned;
- }
- /**
- * e1000_rx_checksum - Receive Checksum Offload for 82543
- * @adapter: board private structure
- * @status_err: receive descriptor status and error fields
- * @csum: receive descriptor csum field
- * @sk_buff: socket buffer with received data
- **/
- static inline void
- e1000_rx_checksum(struct e1000_adapter *adapter,
- uint32_t status_err, uint32_t csum,
- struct sk_buff *skb)
- {
- uint16_t status = (uint16_t)status_err;
- uint8_t errors = (uint8_t)(status_err >> 24);
- skb->ip_summed = CHECKSUM_NONE;
- /* 82543 or newer only */
- if(unlikely(adapter->hw.mac_type < e1000_82543)) return;
- /* Ignore Checksum bit is set */
- if(unlikely(status & E1000_RXD_STAT_IXSM)) return;
- /* TCP/UDP checksum error bit is set */
- if(unlikely(errors & E1000_RXD_ERR_TCPE)) {
- /* let the stack verify checksum errors */
- adapter->hw_csum_err++;
- return;
- }
- /* TCP/UDP Checksum has not been calculated */
- if(adapter->hw.mac_type <= e1000_82547_rev_2) {
- if(!(status & E1000_RXD_STAT_TCPCS))
- return;
- } else {
- if(!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
- return;
- }
- /* It must be a TCP or UDP packet with a valid checksum */
- if(likely(status & E1000_RXD_STAT_TCPCS)) {
- /* TCP checksum is good */
- skb->ip_summed = CHECKSUM_UNNECESSARY;
- } else if(adapter->hw.mac_type > e1000_82547_rev_2) {
- /* IP fragment with UDP payload */
- /* Hardware complements the payload checksum, so we undo it
- * and then put the value in host order for further stack use.
- */
- csum = ntohl(csum ^ 0xFFFF);
- skb->csum = csum;
- skb->ip_summed = CHECKSUM_HW;
- }
- adapter->hw_csum_good++;
- }
- /**
- * e1000_clean_rx_irq - Send received data up the network stack; legacy
- * @adapter: board private structure
- **/
- static boolean_t
- #ifdef CONFIG_E1000_NAPI
- e1000_clean_rx_irq(struct e1000_adapter *adapter,
- struct e1000_rx_ring *rx_ring,
- int *work_done, int work_to_do)
- #else
- e1000_clean_rx_irq(struct e1000_adapter *adapter,
- struct e1000_rx_ring *rx_ring)
- #endif
- {
- 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(unlikely(!(rx_desc->status & E1000_RXD_STAT_EOP))) {
- /* All receives must fit into a single buffer */
- E1000_DBG("%s: Receive packet consumed multiple"
- " buffers\n", netdev->name);
- dev_kfree_skb_irq(skb);
- goto next_desc;
- }
- if(unlikely(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);
- goto next_desc;
- }
- }
- /* Good Receive */
- skb_put(skb, length - ETHERNET_FCS_SIZE);
- /* Receive Checksum Offload */
- e1000_rx_checksum(adapter,
- (uint32_t)(rx_desc->status) |
- ((uint32_t)(rx_desc->errors) << 24),
- rx_desc->csum, skb);
- skb->protocol = eth_type_trans(skb, netdev);
- #ifdef CONFIG_E1000_NAPI
- #ifdef NETIF_F_HW_VLAN_TX
- if(unlikely(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
- netif_receive_skb(skb);
- #endif
- #else /* CONFIG_E1000_NAPI */
- #ifdef NETIF_F_HW_VLAN_TX
- if(unlikely(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);
- }
- #else
- netif_rx(skb);
- #endif
- #endif /* CONFIG_E1000_NAPI */
- netdev->last_rx = jiffies;
- rx_ring->pkt++;
- next_desc:
- rx_desc->status = 0;
- buffer_info->skb = NULL;
- if(unlikely(++i == rx_ring->count)) i = 0;
- rx_desc = E1000_RX_DESC(*rx_ring, i);
- }
- rx_ring->next_to_clean = i;
- adapter->alloc_rx_buf(adapter, rx_ring);
- return cleaned;
- }
- /**
- * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
- * @adapter: board private structure
- **/
- static boolean_t
- #ifdef CONFIG_E1000_NAPI
- e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
- struct e1000_rx_ring *rx_ring,
- int *work_done, int work_to_do)
- #else
- e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
- struct e1000_rx_ring *rx_ring)
- #endif
- {
- union e1000_rx_desc_packet_split *rx_desc;
- struct net_device *netdev = adapter->netdev;
- struct pci_dev *pdev = adapter->pdev;
- struct e1000_buffer *buffer_info;
- struct e1000_ps_page *ps_page;
- struct e1000_ps_page_dma *ps_page_dma;
- struct sk_buff *skb;
- unsigned int i, j;
- uint32_t length, staterr;
- boolean_t cleaned = FALSE;
- i = rx_ring->next_to_clean;
- rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
- staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
- while(staterr & E1000_RXD_STAT_DD) {
- buffer_info = &rx_ring->buffer_info[i];
- ps_page = &rx_ring->ps_page[i];
- ps_page_dma = &rx_ring->ps_page_dma[i];
- #ifdef CONFIG_E1000_NAPI
- if(unlikely(*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;
- if(unlikely(!(staterr & E1000_RXD_STAT_EOP))) {
- E1000_DBG("%s: Packet Split buffers didn't pick up"
- " the full packet\n", netdev->name);
- dev_kfree_skb_irq(skb);
- goto next_desc;
- }
- if(unlikely(staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK)) {
- dev_kfree_skb_irq(skb);
- goto next_desc;
- }
- length = le16_to_cpu(rx_desc->wb.middle.length0);
- if(unlikely(!length)) {
- E1000_DBG("%s: Last part of the packet spanning"
- " multiple descriptors\n", netdev->name);
- dev_kfree_skb_irq(skb);
- goto next_desc;
- }
- /* Good Receive */
- skb_put(skb, length);
- for(j = 0; j < adapter->rx_ps_pages; j++) {
- if(!(length = le16_to_cpu(rx_desc->wb.upper.length[j])))
- break;
- pci_unmap_page(pdev, ps_page_dma->ps_page_dma[j],
- PAGE_SIZE, PCI_DMA_FROMDEVICE);
- ps_page_dma->ps_page_dma[j] = 0;
- skb_shinfo(skb)->frags[j].page =
- ps_page->ps_page[j];
- ps_page->ps_page[j] = NULL;
- skb_shinfo(skb)->frags[j].page_offset = 0;
- skb_shinfo(skb)->frags[j].size = length;
- skb_shinfo(skb)->nr_frags++;
- skb->len += length;
- skb->data_len += length;
- }
- e1000_rx_checksum(adapter, staterr,
- rx_desc->wb.lower.hi_dword.csum_ip.csum, skb);
- skb->protocol = eth_type_trans(skb, netdev);
- if(likely(rx_desc->wb.upper.header_status &
- E1000_RXDPS_HDRSTAT_HDRSP)) {
- adapter->rx_hdr_split++;
- #ifdef HAVE_RX_ZERO_COPY
- skb_shinfo(skb)->zero_copy = TRUE;
- #endif
- }
- #ifdef CONFIG_E1000_NAPI
- #ifdef NETIF_F_HW_VLAN_TX
- if(unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
- vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
- le16_to_cpu(rx_desc->wb.middle.vlan) &
- E1000_RXD_SPC_VLAN_MASK);
- } else {
- netif_receive_skb(skb);
- }
- #else
- netif_receive_skb(skb);
- #endif
- #else /* CONFIG_E1000_NAPI */
- #ifdef NETIF_F_HW_VLAN_TX
- if(unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
- vlan_hwaccel_rx(skb, adapter->vlgrp,
- le16_to_cpu(rx_desc->wb.middle.vlan) &
- E1000_RXD_SPC_VLAN_MASK);
- } else {
- netif_rx(skb);
- }
- #else
- netif_rx(skb);
- #endif
- #endif /* CONFIG_E1000_NAPI */
- netdev->last_rx = jiffies;
- rx_ring->pkt++;
- next_desc:
- rx_desc->wb.middle.status_error &= ~0xFF;
- buffer_info->skb = NULL;
- if(unlikely(++i == rx_ring->count)) i = 0;
- rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
- staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
- }
- rx_ring->next_to_clean = i;
- adapter->alloc_rx_buf(adapter, rx_ring);
- return cleaned;
- }
- /**
- * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
- * @adapter: address of board private structure
- **/
- static void
- e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
- struct e1000_rx_ring *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 int i;
- unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
- i = rx_ring->next_to_use;
- buffer_info = &rx_ring->buffer_info[i];
- while(!buffer_info->skb) {
- skb = dev_alloc_skb(bufsz);
- if(unlikely(!skb)) {
- /* Better luck next round */
- break;
- }
- /* Fix for errata 23, can't cross 64kB boundary */
- if(!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
- struct sk_buff *oldskb = skb;
- DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
- "at %p\n", bufsz, skb->data);
- /* Try again, without freeing the previous */
- skb = dev_alloc_skb(bufsz);
- /* Failed allocation, critical failure */
- if(!skb) {
- dev_kfree_skb(oldskb);
- break;
- }
- if(!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
- /* give up */
- dev_kfree_skb(skb);
- dev_kfree_skb(oldskb);
- break; /* while !buffer_info->skb */
- } else {
- /* Use new allocation */
- dev_kfree_skb(oldskb);
- }
- }
- /* Make buffer alignment 2 beyond a 16 byte boundary
- * this will result in a 16 byte aligned IP header after
- * the 14 byte MAC header is removed
- */
- skb_reserve(skb, NET_IP_ALIGN);
- skb->dev = netdev;
- buffer_info->skb = skb;
- buffer_info->length = adapter->rx_buffer_len;
- buffer_info->dma = pci_map_single(pdev,
- skb->data,
- adapter->rx_buffer_len,
- PCI_DMA_FROMDEVICE);
- /* Fix for errata 23, can't cross 64kB boundary */
- if(!e1000_check_64k_bound(adapter,
- (void *)(unsigned long)buffer_info->dma,
- adapter->rx_buffer_len)) {
- DPRINTK(RX_ERR, ERR,
- "dma align check failed: %u bytes at %p\n",
- adapter->rx_buffer_len,
- (void *)(unsigned long)buffer_info->dma);
- dev_kfree_skb(skb);
- buffer_info->skb = NULL;
- pci_unmap_single(pdev, buffer_info->dma,
- adapter->rx_buffer_len,
- PCI_DMA_FROMDEVICE);
- break; /* while !buffer_info->skb */
- }
- rx_desc = E1000_RX_DESC(*rx_ring, i);
- rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
- if(unlikely((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();
- writel(i, adapter->hw.hw_addr + rx_ring->rdt);
- }
- if(unlikely(++i == rx_ring->count)) i = 0;
- buffer_info = &rx_ring->buffer_info[i];
- }
- rx_ring->next_to_use = i;
- }
- /**
- * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
- * @adapter: address of board private structure
- **/
- static void
- e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
- struct e1000_rx_ring *rx_ring)
- {
- struct net_device *netdev = adapter->netdev;
- struct pci_dev *pdev = adapter->pdev;
- union e1000_rx_desc_packet_split *rx_desc;
- struct e1000_buffer *buffer_info;
- struct e1000_ps_page *ps_page;
- struct e1000_ps_page_dma *ps_page_dma;
- struct sk_buff *skb;
- unsigned int i, j;
- i = rx_ring->next_to_use;
- buffer_info = &rx_ring->buffer_info[i];
- ps_page = &rx_ring->ps_page[i];
- ps_page_dma = &rx_ring->ps_page_dma[i];
- while (!buffer_info->skb) {
- rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
- for (j = 0; j < PS_PAGE_BUFFERS; j++) {
- if (j < adapter->rx_ps_pages) {
- if (likely(!ps_page->ps_page[j])) {
- ps_page->ps_page[j] =
- alloc_page(GFP_ATOMIC);
- if (unlikely(!ps_page->ps_page[j]))
- goto no_buffers;
- ps_page_dma->ps_page_dma[j] =
- pci_map_page(pdev,
- ps_page->ps_page[j],
- 0, PAGE_SIZE,
- PCI_DMA_FROMDEVICE);
- }
- /* Refresh the desc even if buffer_addrs didn't
- * change because each write-back erases
- * this info.
- */
- rx_desc->read.buffer_addr[j+1] =
- cpu_to_le64(ps_page_dma->ps_page_dma[j]);
- } else
- rx_desc->read.buffer_addr[j+1] = ~0;
- }
- skb = dev_alloc_skb(adapter->rx_ps_bsize0 + NET_IP_ALIGN);
- if (unlikely(!skb))
- break;
- /* Make buffer alignment 2 beyond a 16 byte boundary
- * this will result in a 16 byte aligned IP header after
- * the 14 byte MAC header is removed
- */
- skb_reserve(skb, NET_IP_ALIGN);
- skb->dev = netdev;
- buffer_info->skb = skb;
- buffer_info->length = adapter->rx_ps_bsize0;
- buffer_info->dma = pci_map_single(pdev, skb->data,
- adapter->rx_ps_bsize0,
- PCI_DMA_FROMDEVICE);
- rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
- if (unlikely((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();
- /* Hardware increments by 16 bytes, but packet split
- * descriptors are 32 bytes...so we increment tail
- * twice as much.
- */
- writel(i<<1, adapter->hw.hw_addr + rx_ring->rdt);
- }
- if (unlikely(++i == rx_ring->count)) i = 0;
- buffer_info = &rx_ring->buffer_info[i];
- ps_page = &rx_ring->ps_page[i];
- ps_page_dma = &rx_ring->ps_page_dma[i];
- }
- no_buffers:
- 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) {
- #ifdef SIOCGMIIPHY
- case SIOCGMIIPHY:
- case SIOCGMIIREG:
- case SIOCSMIIREG:
- return e1000_mii_ioctl(netdev, ifr, cmd);
- #endif
- case BYPASS_MODE_CTRL_SIOC:
- return e1000_bypass_ctrl_ioctl(netdev, ifr);
- #ifdef ETHTOOL_OPS_COMPAT
- case SIOCETHTOOL:
- return ethtool_ioctl(ifr);
- #endif
- default:
- return -EOPNOTSUPP;
- }
- }
- #ifdef SIOCGMIIPHY
- /**
- * 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(netdev);
- struct mii_ioctl_data *data = if_mii(ifr);
- int retval;
- uint16_t mii_reg;
- uint16_t spddplx;
- unsigned long flags;
- 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;
- spin_lock_irqsave(&adapter->stats_lock, flags);
- if(e1000_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
- &data->val_out)) {
- spin_unlock_irqrestore(&adapter->stats_lock, flags);
- return -EIO;
- }
- spin_unlock_irqrestore(&adapter->stats_lock, flags);
- break;
- case SIOCSMIIREG:
- if(!capable(CAP_NET_ADMIN))
- return -EPERM;
- if(data->reg_num & ~(0x1F))
- return -EFAULT;
- mii_reg = data->val_in;
- spin_lock_irqsave(&adapter->stats_lock, flags);
- if(e1000_write_phy_reg(&adapter->hw, data->reg_num,
- mii_reg)) {
- spin_unlock_irqrestore(&adapter->stats_lock, flags);
- return -EIO;
- }
- if(adapter->hw.phy_type == e1000_phy_m88) {
- switch (data->reg_num) {
- case PHY_CTRL:
- if(mii_reg & MII_CR_POWER_DOWN)
- break;
- if(mii_reg & MII_CR_AUTO_NEG_EN) {
- adapter->hw.autoneg = 1;
- adapter->hw.autoneg_advertised = 0x2F;
- } else {
- if(mii_reg & 0x40)
- spddplx = SPEED_1000;
- else if(mii_reg & 0x2000)
- spddplx = SPEED_100;
- else
- spddplx = SPEED_10;
- spddplx += (mii_reg & 0x100)
- ? FULL_DUPLEX :
- HALF_DUPLEX;
- retval = e1000_set_spd_dplx(adapter,
- spddplx);
- if(retval) {
- spin_unlock_irqrestore(
- &adapter->stats_lock,
- flags);
- 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)) {
- spin_unlock_irqrestore(
- &adapter->stats_lock, flags);
- return -EIO;
- }
- break;
- }
- } else {
- switch (data->reg_num) {
- case PHY_CTRL:
- if(mii_reg & MII_CR_POWER_DOWN)
- break;
- if(netif_running(adapter->netdev)) {
- e1000_down(adapter);
- e1000_up(adapter);
- } else
- e1000_reset(adapter);
- break;
- }
- }
- spin_unlock_irqrestore(&adapter->stats_lock, flags);
- break;
- default:
- return -EOPNOTSUPP;
- }
- return E1000_SUCCESS;
- }
- #endif
- void
- e1000_pci_set_mwi(struct e1000_hw *hw)
- {
- struct e1000_adapter *adapter = hw->back;
- #ifdef HAVE_PCI_SET_MWI
- int ret_val = pci_set_mwi(adapter->pdev);
- if(ret_val)
- DPRINTK(PROBE, ERR, "Error in setting MWI\n");
- #else
- pci_write_config_word(adapter->pdev, PCI_COMMAND,
- adapter->hw.pci_cmd_word |
- PCI_COMMAND_INVALIDATE);
- #endif
- }
- void
- e1000_pci_clear_mwi(struct e1000_hw *hw)
- {
- struct e1000_adapter *adapter = hw->back;
- #ifdef HAVE_PCI_SET_MWI
- pci_clear_mwi(adapter->pdev);
- #else
- pci_write_config_word(adapter->pdev, PCI_COMMAND,
- adapter->hw.pci_cmd_word &
- ~PCI_COMMAND_INVALIDATE);
- #endif
- }
- 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);
- }
- #ifdef NETIF_F_HW_VLAN_TX
- static void
- e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
- {
- struct e1000_adapter *adapter = netdev_priv(netdev);
- 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);
- e1000_update_mng_vlan(adapter);
- } 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);
- if(adapter->mng_vlan_id != (uint16_t)E1000_MNG_VLAN_NONE) {
- e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
- adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
- }
- }
- e1000_irq_enable(adapter);
- }
- static void
- e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
- {
- struct e1000_adapter *adapter = netdev_priv(netdev);
- uint32_t vfta, index;
- if((adapter->hw.mng_cookie.status &
- E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
- (vid == adapter->mng_vlan_id))
- return;
- /* 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(netdev);
- uint32_t vfta, index;
- e1000_irq_disable(adapter);
- if(adapter->vlgrp)
- adapter->vlgrp->vlan_devices[vid] = NULL;
- e1000_irq_enable(adapter);
- if((adapter->hw.mng_cookie.status &
- E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
- (vid == adapter->mng_vlan_id))
- return;
- /* 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);
- }
- }
- }
- #endif
- int
- e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx)
- {
- adapter->hw.autoneg = 0;
- /* Fiber NICs only allow 1000 gbps Full duplex */
- if((adapter->hw.media_type == e1000_media_type_fiber) &&
- spddplx != (SPEED_1000 + DUPLEX_FULL)) {
- DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
- return -EINVAL;
- }
- 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:
- DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
- 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(netdev);
- uint32_t ctrl, ctrl_ext, rctl, manc, status, swsm;
- 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);
- }
- /* Allow time for pending master requests to run */
- e1000_disable_pciex_master(&adapter->hw);
- 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);
- 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 */
- }
- }
- switch(adapter->hw.mac_type) {
- case e1000_82571:
- case e1000_82572:
- ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
- E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
- ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
- break;
- case e1000_82573:
- swsm = E1000_READ_REG(&adapter->hw, SWSM);
- E1000_WRITE_REG(&adapter->hw, SWSM,
- swsm & ~E1000_SWSM_DRV_LOAD);
- break;
- default:
- break;
- }
- pci_disable_device(pdev);
- 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(netdev);
- uint32_t manc, ret_val, swsm;
- uint32_t ctrl_ext;
- pci_set_power_state(pdev, 0);
- pci_restore_state(pdev);
- ret_val = pci_enable_device(pdev);
- pci_set_master(pdev);
- 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);
- }
- switch(adapter->hw.mac_type) {
- case e1000_82571:
- case e1000_82572:
- ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
- E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
- ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
- break;
- case e1000_82573:
- swsm = E1000_READ_REG(&adapter->hw, SWSM);
- E1000_WRITE_REG(&adapter->hw, SWSM,
- swsm | E1000_SWSM_DRV_LOAD);
- break;
- default:
- break;
- }
- 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 *netdev)
- {
- struct e1000_adapter *adapter = netdev_priv(netdev);
- disable_irq(adapter->pdev->irq);
- e1000_intr(adapter->pdev->irq, netdev, NULL);
- enable_irq(adapter->pdev->irq);
- }
- #endif
-
- /* Click polling support */
- static struct sk_buff *
- e1000_rx_poll(struct net_device *dev, int *want)
- {
- struct e1000_adapter *adapter = dev->priv;
- struct pci_dev *pdev = adapter->pdev;
- struct e1000_rx_desc *rx_desc;
- struct e1000_rx_ring *rx_ring = adapter->rx_ring;
- struct sk_buff *skb_head = NULL, **skb;
- uint32_t length;
- int got, next;
- skb = &skb_head;
- for( got = 0, next = (rx_ring->next_to_clean + 1) % rx_ring->count;
- got < *want && next != rx_ring->next_to_use;
- got++, rx_ring->next_to_clean = next,
- next = (rx_ring->next_to_clean + 1) % rx_ring->count) {
- int i = rx_ring->next_to_clean;
- rx_desc = E1000_RX_DESC(*rx_ring, i);
- if(!(rx_desc->status & E1000_RXD_STAT_DD))
- break;
- 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;
- rx_ring->buffer_info[i].skb = NULL;
-
- if(!(rx_desc->status & E1000_RXD_STAT_EOP) ||
- (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
- rx_desc->status = 0;
- dev_kfree_skb(*skb);
- *skb = NULL;
- got--;
- continue;
- }
- rx_desc->status = 0;
- length = le16_to_cpu(rx_desc->length);
- skb_put(*skb, length - CRC_LENGTH);
- e1000_rx_checksum(adapter,
- (uint32_t)(rx_desc->status) | ((uint32_t)(rx_desc->errors) << 24),
- rx_desc->csum, *skb);
- skb_pull(*skb, dev->hard_header_len);
-
- skb = &((*skb)->next);
- *skb = NULL;
- }
- *want = got;
- /*
- * Receive Lockup detection and recovery
- */
- if (got) {
- adapter->rx_state = E1000_RX_STATE_NORMAL;
- adapter->rx_normal_jiffies = jiffies + HZ;
- } else {
- int rdfh;
- int rdft;
- switch (adapter->rx_state) {
- case E1000_RX_STATE_NORMAL:
- if (jiffies < adapter->rx_normal_jiffies)
- break;
- adapter->rx_state = E1000_RX_STATE_QUIET;
- adapter->rx_quiet_jiffies = jiffies + HZ;
- adapter->prev_rdfh = E1000_READ_REG(&adapter->hw, RDFH);
- adapter->prev_rdft = E1000_READ_REG(&adapter->hw, RDFT);
- break;
- case E1000_RX_STATE_QUIET:
- rdfh = E1000_READ_REG(&adapter->hw, RDFH);
- rdft = E1000_READ_REG(&adapter->hw, RDFT);
- if (adapter->prev_rdfh != rdfh ||
- adapter->prev_rdft != rdft ||
- adapter->prev_rdfh == adapter->prev_rdft) {
- adapter->prev_rdfh = rdfh;
- adapter->prev_rdft = rdft;
- adapter->rx_quiet_jiffies = jiffies + HZ;
- break;
- }
- if (jiffies < adapter->rx_quiet_jiffies)
- break;
- /* Fall into the lockup case */
- case E1000_RX_STATE_LOCKUP:
- /* Receive lockup detected: perform a recovery */
- adapter->rx_lockup_recoveries++;
- /* taken from e1000_down() */
- e1000_reset(adapter);
- e1000_clean_tx_ring(adapter, adapter->tx_ring);
- e1000_clean_rx_ring(adapter, adapter->rx_ring);
- /* taken from e1000_up() */
- e1000_set_multi(dev);
- e1000_configure_tx(adapter);
- e1000_setup_rctl(adapter);
- e1000_configure_rx(adapter);
- e1000_alloc_rx_buffers(adapter, adapter->rx_ring);
- /* reset the lockup detection */
- adapter->rx_state = E1000_RX_STATE_NORMAL;
- adapter->rx_normal_jiffies = jiffies + HZ;
- break;
- }
- }
- return skb_head;
- }
- int
- e1000_rx_refill(struct net_device *dev, struct sk_buff **skbs)
- {
- struct e1000_adapter *adapter = dev->priv;
- struct e1000_rx_ring *rx_ring = adapter->rx_ring;
- struct pci_dev *pdev = adapter->pdev;
- struct e1000_rx_desc *rx_desc;
- struct sk_buff *skb;
- int next;
- /*
- * Update statistics counters, check link.
- * do_poll_watchdog is set by the timer interrupt e1000_watchdog(),
- * but we don't want to do the work in an interrupt (since it may
- * happen while polling code is active), so defer it to here.
- */
- if(adapter->do_poll_watchdog){
- adapter->do_poll_watchdog = 0;
- e1000_watchdog_1(adapter);
- }
- if (!netif_carrier_ok(dev))
- return 0;
- if(skbs == 0)
- return E1000_DESC_UNUSED(rx_ring);
- for( next = (rx_ring->next_to_use + 1) % rx_ring->count;
- next != rx_ring->next_to_clean;
- rx_ring->next_to_use = next,
- next = (rx_ring->next_to_use + 1) % rx_ring->count ) {
- int i = rx_ring->next_to_use;
- if(rx_ring->buffer_info[i].skb != NULL)
- break;
-
- if(!(skb = *skbs))
- break;
- *skbs = skb->next;
- skb->next = NULL;
- skb->dev = dev;
-
- 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 = E1000_RX_DESC(*rx_ring, i);
- rx_desc->buffer_addr = cpu_to_le64(rx_ring->buffer_info[i].dma);
-
- /* Intel documnetation says: "Software adds receive descriptors by
- * writing the tail pointer with the index of the entry beyond the
- * last valid descriptor." (ref 11337 p 27) */
- E1000_WRITE_REG(&adapter->hw, RDT, next);
- }
-
- return E1000_DESC_UNUSED(adapter->rx_ring);
- }
- static int
- e1000_tx_pqueue(struct net_device *netdev, struct sk_buff *skb)
- {
- /*
- * This function is just a streamlined version of
- * return e1000_xmit_frame(skb, netdev);
- */
- struct e1000_adapter *adapter = netdev->priv;
- struct pci_dev *pdev = adapter->pdev;
- struct e1000_tx_desc *tx_desc;
- int i, len, offset, txd_needed;
- uint32_t txd_upper, txd_lower;
- unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
- if(!netif_carrier_ok(netdev)) {
- netif_stop_queue(netdev);
- return -1;
- }
- txd_needed = TXD_USE_COUNT(skb->len, max_txd_pwr);
- /* make sure there are enough Tx descriptors available in the ring */
- if(E1000_DESC_UNUSED(adapter->tx_ring) <= (txd_needed + 1)) {
- adapter->net_stats.tx_dropped++;
- netif_stop_queue(netdev);
- return -1;
- }
- txd_upper = 0;
- txd_lower = adapter->txd_cmd;
- if(e1000_tx_csum(adapter, adapter->tx_ring, skb)){
- txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
- txd_upper |= E1000_TXD_POPTS_TXSM << 8;
- }
- i = adapter->tx_ring->next_to_use;
- tx_desc = E1000_TX_DESC(*(adapter->tx_ring), i);
- len = skb->len;
- offset = 0;
- adapter->tx_ring->buffer_info[i].length = len;
- adapter->tx_ring->buffer_info[i].dma =
- pci_map_page(pdev, virt_to_page(skb->data + offset),
- (unsigned long) (skb->data + offset) & ~PAGE_MASK, len,
- PCI_DMA_TODEVICE);
- /* thanks Adam Greenhalgh and Beyers Cronje! */
- adapter->tx_ring->buffer_info[i].time_stamp = jiffies;
- tx_desc->buffer_addr = cpu_to_le64(adapter->tx_ring->buffer_info[i].dma);
- tx_desc->lower.data = cpu_to_le32(txd_lower | len);
- tx_desc->upper.data = cpu_to_le32(txd_upper);
- /* EOP and SKB pointer go with the last fragment */
- tx_desc->lower.data |= cpu_to_le32(E1000_TXD_CMD_EOP);
- adapter->tx_ring->buffer_info[i].skb = skb;
- i = i + 1;
- if(i >= adapter->tx_ring->count)
- i = 0;
- /* Move the HW Tx Tail Pointer */
- adapter->tx_ring->next_to_use = i;
- netdev->trans_start = jiffies;
- return 0;
- }
- static struct sk_buff *
- e1000_tx_clean(struct net_device *netdev)
- {
- /*
- * This function is a streamlined version of
- * return e1000_clean_tx_irq(adapter, 1);
- */
- struct e1000_adapter *adapter = netdev->priv;
- struct pci_dev *pdev = adapter->pdev;
- int i;
- struct e1000_tx_desc *tx_desc;
- struct sk_buff *skb_head, *skb_last;
- skb_head = skb_last = 0;
- i = adapter->tx_ring->next_to_clean;
- tx_desc = E1000_TX_DESC(*(adapter->tx_ring), i);
- while(tx_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
- if(adapter->tx_ring->buffer_info[i].dma != 0) {
- pci_unmap_page(pdev, adapter->tx_ring->buffer_info[i].dma,
- adapter->tx_ring->buffer_info[i].length,
- PCI_DMA_TODEVICE);
- adapter->tx_ring->buffer_info[i].dma = 0;
- }
- if(adapter->tx_ring->buffer_info[i].skb != NULL) {
- struct sk_buff *skb = adapter->tx_ring->buffer_info[i].skb;
- if (skb_head == 0) {
- skb_head = skb;
- skb_last = skb;
- skb_last->next = NULL;
- } else {
- skb_last->next = skb;
- skb->next = NULL;
- skb_last = skb;
- }
- adapter->tx_ring->buffer_info[i].skb = NULL;
- }
-
- i = (i + 1) % adapter->tx_ring->count;
- tx_desc->upper.data = 0;
- tx_desc = E1000_TX_DESC(*(adapter->tx_ring), i);
- }
- adapter->tx_ring->next_to_clean = i;
- if(netif_queue_stopped(netdev) &&
- (E1000_DESC_UNUSED(adapter->tx_ring) > E1000_TX_QUEUE_WAKE)) {
- netif_start_queue(netdev);
- }
- return skb_head;
- }
- static int
- e1000_poll_on(struct net_device *dev)
- {
- struct e1000_adapter *adapter = dev->priv;
- unsigned long flags;
- if (!dev->polling) {
- printk("e1000_poll_on\n");
- local_irq_save(flags);
- local_irq_disable();
- dev->polling = 2;
-
- e1000_irq_disable(adapter);
- local_irq_restore(flags);
- }
- return 0;
- }
- static int
- e1000_poll_off(struct net_device *dev)
- {
- struct e1000_adapter *adapter = dev->priv;
- if(dev->polling > 0){
- dev->polling = 0;
- e1000_irq_enable(adapter);
- printk("e1000_poll_off\n");
- }
- return 0;
- }
- static int
- e1000_tx_eob(struct net_device *dev)
- {
- struct e1000_adapter *adapter = dev->priv;
- E1000_WRITE_REG(&adapter->hw, TDT, adapter->tx_ring->next_to_use);
- return 0;
- }
- static int
- e1000_tx_start(struct net_device *dev)
- {
- /* printk("e1000_tx_start called\n"); */
- e1000_tx_eob(dev);
- return 0;
- }
- #ifdef DEBUG_PRINT
- /* debugging tools */
- #define PRT_HEX(str,value) printk("skb->%-10s = 0x%08x\n", str, (unsigned int)value);
- #define PRT_DEC(str,value) printk("skb->%-10s = %d\n", str, value);
- void e1000_print_skb(struct sk_buff* skb)
- {
- int i;
- printk("========================\n");
- printk("skb = 0x%08x\n", (unsigned int)skb);
- PRT_HEX("next", skb->next);
- PRT_HEX("prev", skb->prev);
- PRT_DEC("len", skb->len);
- PRT_HEX("data", skb->data);
- PRT_HEX("tail", skb->tail);
- PRT_HEX("dev", skb->dev);
- PRT_DEC("cloned", skb->cloned);
- PRT_DEC("pkt_type", skb->pkt_type);
- PRT_DEC("users", skb->users);
- PRT_DEC("truesize", skb->truesize);
- PRT_HEX("head", skb->head);
- PRT_HEX("end", skb->end);
- PRT_HEX("list", skb->list);
- PRT_DEC("data_len", skb->data_len);
- PRT_HEX("csum", skb->csum);
- PRT_HEX("skb_shinfo", skb_shinfo(skb));
- PRT_HEX("skb_shinfo->frag_list", skb_shinfo(skb)->frag_list);
- PRT_DEC("skb_shinfo->nr_frags", skb_shinfo(skb)->nr_frags);
- PRT_DEC("skb_shinfo->dataref", skb_shinfo(skb)->dataref);
- for (i=0; i<skb_shinfo(skb)->nr_frags && i<8; ++i)
- printk("skb->skb_shinfo->frags[%d] = 0x%08x\n", i, skb_shinfo(skb)->frags[i]);
- }
- void e1000_print_rx_desc(struct e1000_rx_desc *rx_desc)
- {
- printk("rx_desc = 0x%08x\n", rx_desc);
- printk("rx_desc->buffer_addr = 0x%08x\n", rx_desc->buffer_addr);
- printk("rx_desc->length = %d\n", rx_desc->length);
- printk("rx_desc->csum = 0x%04x\n", rx_desc->csum);
- printk("rx_desc->status = 0x%02x\n", rx_desc->status);
- printk("rx_desc->errors = 0x%02x\n", rx_desc->errors);
- printk("rx_desc->special = 0x%04x\n", rx_desc->special);
- }
- void e1000_print_rx_buffer_info(struct e1000_buffer *bi)
- {
- printk("buffer_info = 0x%08x\n", bi);
- printk("buffer_info->skb = 0x%08x\n", bi->skb);
- printk("buffer_info->length = 0x%08x (%d)\n", bi->length, bi->length);
- printk("buffer_info->time_stamp = 0x%08x\n", bi->time_stamp);
- }
- void e1000_print_rx_desc_ring(struct e1000_desc_ring *desc_ring)
- {
- int i;
- struct e1000_buffer *bi;
- struct e1000_rx_desc *desc;
- printk("\n");
- printk("desc_ring = 0x%08x\n", desc_ring);
- printk("desc_ring->desc = 0x%08x\n", desc_ring->desc);
- printk("desc_ring->dma = 0x%08x\n", desc_ring->dma);
- printk("desc_ring->size = 0x%08x (%d)\n", desc_ring->size, desc_ring->size);
- printk("desc_ring->count = 0x%08x (%d)\n", desc_ring->count, desc_ring->count);
- printk("desc_ring->next_to_use = 0x%08x (%d)\n", desc_ring->next_to_use, desc_ring->next_to_use);
- printk("desc_ring->next_to_clean = 0x%08x (%d)\n", desc_ring->next_to_clean, desc_ring->next_to_clean);
- printk("desc_ring->buffer_info = 0x%08x\n", desc_ring->buffer_info);
- printk("\n");
- bi = desc_ring->buffer_info;
- desc = desc_ring->desc;
- for (i=0; i<desc_ring->count; ++i) {
- printk("===================================================== desc/buffer_info # %d\n", i);
- e1000_print_rx_buffer_info(bi++);
- e1000_print_rx_desc(desc++);
- }
- }
- #undef PRT_HEX
- #undef PRT_DEC
- #endif
- /* e1000_main.c */