/******************************************************************************* Copyright(c) 1999 - 2006 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 e1000-devel Mailing List Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 *******************************************************************************/ #include "e1000.h" /* Change Log * * Port to rtnet (0.9.3) by Mathias Koehrer. Base version: e1000-7.1.9 * 8-Aug-2006 * * 7.0.36 10-Mar-2006 * o fixups for compilation issues on older kernels * 7.0.35 3-Mar-2006 * 7.0.34 * o Major performance fixes by understanding relationship of rx_buffer_len * to window size growth. _ps and legacy receive paths changed * o merge with kernel changes * o legacy receive path went back to single descriptor model for jumbos * 7.0.33 3-Feb-2006 * o Added another fix for the pass false carrier bit * 7.0.32 24-Jan-2006 * o Need to rebuild with noew version number for the pass false carrier * fix in e1000_hw.c * 7.0.30 18-Jan-2006 * o fixup for tso workaround to disable it for pci-x * o fix mem leak on 82542 * o fixes for 10 Mb/s connections and incorrect stats * 7.0.28 01/06/2006 * o hardware workaround to only set "speed mode" bit for 1G link. * 7.0.26 12/23/2005 * o wake on lan support modified for device ID 10B5 * o fix dhcp + vlan issue not making it to the iAMT firmware * 7.0.24 12/9/2005 * o New hardware support for the Gigabit NIC embedded in the south bridge * o Fixes to the recycling logic (skb->tail) from IBM LTC * 6.3.7 11/18/2005 * o Honor eeprom setting for enabling/disabling Wake On Lan * 6.3.5 11/17/2005 * o Fix memory leak in rx ring handling for PCI Express adapters * 6.3.4 11/8/05 * o Patch from Jesper Juhl to remove redundant NULL checks for kfree * 6.3.2 9/20/05 * o Render logic that sets/resets DRV_LOAD as inline functions to * avoid code replication. If f/w is AMT then set DRV_LOAD only when * network interface is open. * o Handle DRV_LOAD set/reset in cases where AMT uses VLANs. * o Adjust PBA partioning for Jumbo frames using MTU size and not * rx_buffer_len * 6.3.1 9/19/05 * o Use adapter->tx_timeout_factor in Tx Hung Detect logic * (e1000_clean_tx_irq) * o Support for 8086:10B5 device (Quad Port) */ char e1000_driver_name[] = "rt_e1000"; static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver"; #ifndef CONFIG_E1000_NAPI #define DRIVERNAPI #else #define DRIVERNAPI "-NAPI" #endif #define DRV_VERSION "7.1.9"DRIVERNAPI char e1000_driver_version[] = DRV_VERSION; static char e1000_copyright[] = "Copyright (c) 1999-2006 Intel Corporation."; /* 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(0x1049), INTEL_E1000_ETHERNET_DEVICE(0x104A), INTEL_E1000_ETHERNET_DEVICE(0x104B), INTEL_E1000_ETHERNET_DEVICE(0x104C), INTEL_E1000_ETHERNET_DEVICE(0x104D), 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(0x1096), INTEL_E1000_ETHERNET_DEVICE(0x1098), INTEL_E1000_ETHERNET_DEVICE(0x1099), INTEL_E1000_ETHERNET_DEVICE(0x109A), INTEL_E1000_ETHERNET_DEVICE(0x10A4), INTEL_E1000_ETHERNET_DEVICE(0x10B5), INTEL_E1000_ETHERNET_DEVICE(0x10B9), INTEL_E1000_ETHERNET_DEVICE(0x10BA), INTEL_E1000_ETHERNET_DEVICE(0x10BB), INTEL_E1000_ETHERNET_DEVICE(0x10BC), INTEL_E1000_ETHERNET_DEVICE(0x10C4), INTEL_E1000_ETHERNET_DEVICE(0x10C5), /* 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_reinit_locked(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); static int e1000_setup_tx_resources(struct e1000_adapter *adapter, struct e1000_tx_ring *txdr); static int e1000_setup_rx_resources(struct e1000_adapter *adapter, struct e1000_rx_ring *rxdr); static void e1000_free_tx_resources(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring); static void e1000_free_rx_resources(struct e1000_adapter *adapter, struct e1000_rx_ring *rx_ring); static int e1000_init_module(void); static void e1000_exit_module(void); static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent); static void e1000_remove(struct pci_dev *pdev); static int e1000_alloc_queues(struct e1000_adapter *adapter); static int e1000_sw_init(struct e1000_adapter *adapter); static int e1000_open(struct rtnet_device *netdev); static int e1000_close(struct rtnet_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 rtnet_device *netdev); static void e1000_update_phy_info_task(struct work_struct *work); static void e1000_watchdog(struct work_struct *work); static void e1000_82547_tx_fifo_stall_task(struct work_struct *work); static int e1000_xmit_frame(struct rtskb *skb, struct rtnet_device *netdev); static int e1000_intr(rtdm_irq_t *irq_handle); static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring); static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter, struct e1000_rx_ring *rx_ring, nanosecs_abs_t *time_stamp); static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter, struct e1000_rx_ring *rx_ring, int cleaned_count); #ifdef SIOCGMIIPHY #endif void e1000_set_ethtool_ops(struct rtnet_device *netdev); #ifdef ETHTOOL_OPS_COMPAT extern int ethtool_ioctl(struct ifreq *ifr); #endif static void e1000_enter_82542_rst(struct e1000_adapter *adapter); static void e1000_leave_82542_rst(struct e1000_adapter *adapter); static void e1000_smartspeed(struct e1000_adapter *adapter); static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct rtskb *skb); /* 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 = e1000_remove, }; MODULE_AUTHOR("Intel Corporation, "); MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver for rtnet"); MODULE_LICENSE("GPL"); MODULE_VERSION(DRV_VERSION); static int local_debug = NETIF_MSG_DRV | NETIF_MSG_PROBE; module_param_named(debug, local_debug, int, 0); MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); #define MAX_UNITS 8 static int cards[MAX_UNITS] = { [0 ... (MAX_UNITS-1)] = 1 }; module_param_array(cards, int, NULL, 0444); MODULE_PARM_DESC(cards, "array of cards to be supported (eg. 1,0,1)"); #define kmalloc(a,b) rtdm_malloc(a) #define vmalloc(a) rtdm_malloc(a) #define kfree(a) rtdm_free(a) #define vfree(a) rtdm_free(a) /** * e1000_init_module - Driver Registration Routine * * e1000_init_module is the first routine called when the driver is * loaded. All it does is register with the PCI subsystem. **/ static int __init e1000_init_module(void) { int ret; printk(KERN_INFO "%s - version %s\n", e1000_driver_string, e1000_driver_version); printk(KERN_INFO "%s\n", e1000_copyright); ret = pci_register_driver(&e1000_driver); 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) { pci_unregister_driver(&e1000_driver); } module_exit(e1000_exit_module); static int e1000_request_irq(struct e1000_adapter *adapter) { struct rtnet_device *netdev = adapter->netdev; int flags, err = 0; flags = RTDM_IRQTYPE_SHARED; #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; } } if (adapter->have_msi) flags = 0; #endif rt_stack_connect(netdev, &STACK_manager); if ((err = rtdm_irq_request(&adapter->irq_handle, adapter->pdev->irq, e1000_intr, flags, netdev->name, netdev))) DPRINTK(PROBE, ERR, "Unable to allocate interrupt Error: %d\n", err); return err; } static void e1000_free_irq(struct e1000_adapter *adapter) { // struct rtnet_device *netdev = adapter->netdev; rtdm_irq_free(&adapter->irq_handle); #ifdef CONFIG_PCI_MSI if (adapter->have_msi) pci_disable_msi(adapter->pdev); #endif } /** * e1000_irq_disable - Mask off interrupt generation on the NIC * @adapter: board private structure **/ static 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 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); } } /** * e1000_release_hw_control - release control of the h/w to f/w * @adapter: address of board private structure * * e1000_release_hw_control resets {CTRL_EXT|FWSM}:DRV_LOAD bit. * For ASF and Pass Through versions of f/w this means that the * driver is no longer loaded. For AMT version (only with 82573) i * of the f/w this means that the netowrk i/f is closed. * **/ static void e1000_release_hw_control(struct e1000_adapter *adapter) { uint32_t ctrl_ext; uint32_t swsm; uint32_t extcnf; /* Let firmware taken over control of h/w */ switch (adapter->hw.mac_type) { case e1000_82571: case e1000_82572: case e1000_80003es2lan: 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; case e1000_ich8lan: extcnf = E1000_READ_REG(&adapter->hw, CTRL_EXT); E1000_WRITE_REG(&adapter->hw, CTRL_EXT, extcnf & ~E1000_CTRL_EXT_DRV_LOAD); break; default: break; } } /** * e1000_get_hw_control - get control of the h/w from f/w * @adapter: address of board private structure * * e1000_get_hw_control sets {CTRL_EXT|FWSM}:DRV_LOAD bit. * For ASF and Pass Through versions of f/w this means that * the driver is loaded. For AMT version (only with 82573) * of the f/w this means that the netowrk i/f is open. * **/ static void e1000_get_hw_control(struct e1000_adapter *adapter) { uint32_t ctrl_ext; uint32_t swsm; uint32_t extcnf; /* Let firmware know the driver has taken over */ switch (adapter->hw.mac_type) { case e1000_82571: case e1000_82572: case e1000_80003es2lan: 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; case e1000_ich8lan: extcnf = E1000_READ_REG(&adapter->hw, EXTCNF_CTRL); E1000_WRITE_REG(&adapter->hw, EXTCNF_CTRL, extcnf | E1000_EXTCNF_CTRL_SWFLAG); break; default: break; } } int e1000_up(struct e1000_adapter *adapter) { struct rtnet_device *netdev = adapter->netdev; int i; /* hardware has been reset, we need to reload some things */ e1000_set_multi(netdev); e1000_configure_tx(adapter); e1000_setup_rctl(adapter); e1000_configure_rx(adapter); /* call E1000_DESC_UNUSED which always leaves * at least 1 descriptor unused to make sure * next_to_use != next_to_clean */ for (i = 0; i < adapter->num_rx_queues; i++) { struct e1000_rx_ring *ring = &adapter->rx_ring[i]; adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring)); } // TODO makoehre adapter->tx_queue_len = netdev->tx_queue_len; schedule_delayed_work(&adapter->watchdog_task, 1); e1000_irq_enable(adapter); return 0; } /** * e1000_power_up_phy - restore link in case the phy was powered down * @adapter: address of board private structure * * The phy may be powered down to save power and turn off link when the * driver is unloaded and wake on lan is not enabled (among others) * *** this routine MUST be followed by a call to e1000_reset *** * **/ static void e1000_power_up_phy(struct e1000_adapter *adapter) { uint16_t mii_reg = 0; /* Just clear the power down bit to wake the phy back up */ if (adapter->hw.media_type == e1000_media_type_copper) { /* according to the manual, the phy will retain its * settings across a power-down/up cycle */ 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); } } static void e1000_power_down_phy(struct e1000_adapter *adapter) { boolean_t mng_mode_enabled = (adapter->hw.mac_type >= e1000_82571) && e1000_check_mng_mode(&adapter->hw); /* Power down the PHY so no link is implied when interface is down * * The PHY cannot be powered down if any of the following is TRUE * * (a) WoL is enabled * (b) AMT is active * (c) SoL/IDER session is active */ if (!adapter->wol && adapter->hw.mac_type >= e1000_82540 && adapter->hw.mac_type != e1000_ich8lan && adapter->hw.media_type == e1000_media_type_copper && !(E1000_READ_REG(&adapter->hw, MANC) & E1000_MANC_SMBUS_EN) && !mng_mode_enabled && !e1000_check_phy_reset_block(&adapter->hw)) { uint16_t mii_reg = 0; 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); } } static void e1000_down_and_stop(struct e1000_adapter *adapter) { cancel_work_sync(&adapter->reset_task); cancel_delayed_work_sync(&adapter->watchdog_task); cancel_delayed_work_sync(&adapter->phy_info_task); cancel_delayed_work_sync(&adapter->fifo_stall_task); } void e1000_down(struct e1000_adapter *adapter) { struct rtnet_device *netdev = adapter->netdev; e1000_irq_disable(adapter); e1000_down_and_stop(adapter); // TODO makoehre netdev->tx_queue_len = adapter->tx_queue_len; adapter->link_speed = 0; adapter->link_duplex = 0; rtnetif_carrier_off(netdev); rtnetif_stop_queue(netdev); e1000_reset(adapter); e1000_clean_all_tx_rings(adapter); e1000_clean_all_rx_rings(adapter); } void e1000_reinit_locked(struct e1000_adapter *adapter) { WARN_ON(in_interrupt()); if (test_and_set_bit(__E1000_RESETTING, &adapter->flags)) msleep(1); e1000_down(adapter); e1000_up(adapter); clear_bit(__E1000_RESETTING, &adapter->flags); } void e1000_reset(struct e1000_adapter *adapter) { uint32_t pba; uint16_t fc_high_water_mark = E1000_FC_HIGH_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: case e1000_80003es2lan: pba = E1000_PBA_38K; break; case e1000_82573: pba = E1000_PBA_12K; break; case e1000_ich8lan: pba = E1000_PBA_8K; break; default: pba = E1000_PBA_48K; break; } if ((adapter->hw.mac_type != e1000_82573) && (adapter->netdev->mtu > E1000_RXBUFFER_8192)) pba -= 8; /* allocate more FIFO for Tx */ 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 */ /* Set the FC high water mark to 90% of the FIFO size. * Required to clear last 3 LSB */ fc_high_water_mark = ((pba * 9216)/10) & 0xFFF8; /* We can't use 90% on small FIFOs because the remainder * would be less than 1 full frame. In this case, we size * it to allow at least a full frame above the high water * mark. */ if (pba < E1000_PBA_16K) fc_high_water_mark = (pba * 1024) - 1600; adapter->hw.fc_high_water = fc_high_water_mark; adapter->hw.fc_low_water = fc_high_water_mark - 8; if (adapter->hw.mac_type == e1000_80003es2lan) adapter->hw.fc_pause_time = 0xFFFF; else 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"); /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */ E1000_WRITE_REG(&adapter->hw, VET, ETHERNET_IEEE_VLAN_TYPE); E1000_WRITE_REG(&adapter->hw, AIT, 0); // Set adaptive interframe spacing to zero // e1000_reset_adaptive(&adapter->hw); e1000_phy_get_info(&adapter->hw, &adapter->phy_info); if (!adapter->smart_power_down && (adapter->hw.mac_type == e1000_82571 || adapter->hw.mac_type == e1000_82572)) { uint16_t phy_data = 0; /* speed up time to link by disabling smart power down, ignore * the return value of this function because there is nothing * different we would do if it failed */ e1000_read_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT, &phy_data); phy_data &= ~IGP02E1000_PM_SPD; e1000_write_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT, phy_data); } } static void e1000_reset_task(struct work_struct *work) { struct e1000_adapter *adapter = container_of(work, struct e1000_adapter, reset_task); e1000_reinit_locked(adapter); } /** * e1000_probe - Device Initialization Routine * @pdev: PCI device information struct * @ent: entry in e1000_pci_tbl * * Returns 0 on success, negative on failure * * e1000_probe initializes an adapter identified by a pci_dev structure. * The OS initialization, configuring of the adapter private structure, * and a hardware reset occur. **/ static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { struct rtnet_device *netdev; struct e1000_adapter *adapter; unsigned long mmio_start, mmio_len; unsigned long flash_start, flash_len; static int cards_found = 0; static int e1000_ksp3_port_a = 0; /* global ksp3 port a indication */ int i, err; uint16_t eeprom_data; uint16_t eeprom_apme_mask = E1000_EEPROM_APME; if (cards[cards_found++] == 0) { return -ENODEV; } if ((err = pci_enable_device(pdev))) return err; if ((err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) || (err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64)))) { if ((err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) && (err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)))) { E1000_ERR("No usable DMA configuration, aborting\n"); return err; } } if ((err = pci_request_regions(pdev, e1000_driver_name))) return err; pci_set_master(pdev); netdev = rt_alloc_etherdev(sizeof(struct e1000_adapter), 48); if (!netdev) { err = -ENOMEM; goto err_alloc_etherdev; } memset(netdev->priv, 0, sizeof(struct e1000_adapter)); rt_rtdev_connect(netdev, &RTDEV_manager); // SET_NETDEV_DEV(netdev, &pdev->dev); netdev->vers = RTDEV_VERS_2_0; netdev->sysbind = &pdev->dev; pci_set_drvdata(pdev, netdev); adapter = netdev->priv; adapter->netdev = netdev; adapter->pdev = pdev; adapter->hw.back = adapter; adapter->msg_enable = (1 << local_debug) - 1; mmio_start = pci_resource_start(pdev, BAR_0); mmio_len = pci_resource_len(pdev, BAR_0); adapter->hw.hw_addr = ioremap(mmio_start, mmio_len); if (!adapter->hw.hw_addr) { err = -EIO; goto err_ioremap; } for (i = BAR_1; i <= BAR_5; i++) { if (pci_resource_len(pdev, i) == 0) continue; if (pci_resource_flags(pdev, i) & IORESOURCE_IO) { adapter->hw.io_base = pci_resource_start(pdev, i); break; } } netdev->open = &e1000_open; netdev->stop = &e1000_close; netdev->hard_start_xmit = &e1000_xmit_frame; // netdev->get_stats = &e1000_get_stats; // netdev->set_multicast_list = &e1000_set_multi; // netdev->set_mac_address = &e1000_set_mac; // netdev->change_mtu = &e1000_change_mtu; // netdev->do_ioctl = &e1000_ioctl; // e1000_set_ethtool_ops(netdev); 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 - 1; /* setup the private structure */ if ((err = e1000_sw_init(adapter))) goto err_sw_init; /* Flash BAR mapping must happen after e1000_sw_init * because it depends on mac_type */ if ((adapter->hw.mac_type == e1000_ich8lan) && (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) { flash_start = pci_resource_start(pdev, 1); flash_len = pci_resource_len(pdev, 1); adapter->hw.flash_address = ioremap(flash_start, flash_len); if (!adapter->hw.flash_address) { err = -EIO; goto err_flashmap; } } if ((err = e1000_check_phy_reset_block(&adapter->hw))) DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n"); /* if ksp3, indicate if it's port a being setup */ if (pdev->device == E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3 && e1000_ksp3_port_a == 0) adapter->ksp3_port_a = 1; e1000_ksp3_port_a++; /* Reset for multiple KP3 adapters */ if (e1000_ksp3_port_a == 4) e1000_ksp3_port_a = 0; netdev->features |= NETIF_F_LLTX; adapter->en_mng_pt = e1000_enable_mng_pass_thru(&adapter->hw); /* initialize eeprom parameters */ if (e1000_init_eeprom_params(&adapter->hw)) { E1000_ERR("EEPROM initialization failed\n"); return -EIO; } /* 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); #ifdef ETHTOOL_GPERMADDR memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len); if (!is_valid_ether_addr(netdev->perm_addr)) { #else if (!is_valid_ether_addr(netdev->dev_addr)) { #endif 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_DELAYED_WORK(&adapter->watchdog_task, e1000_watchdog); INIT_DELAYED_WORK(&adapter->fifo_stall_task, e1000_82547_tx_fifo_stall_task); INIT_DELAYED_WORK(&adapter->phy_info_task, e1000_update_phy_info_task); INIT_WORK(&adapter->reset_task, (void (*)(struct work_struct *))e1000_reset_task); /* we're going to reset, so assume we have no link for now */ rtnetif_carrier_off(netdev); rtnetif_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_ich8lan: e1000_read_eeprom(&adapter->hw, EEPROM_INIT_CONTROL1_REG, 1, &eeprom_data); eeprom_apme_mask = E1000_EEPROM_ICH8_APME; break; case e1000_82546: case e1000_82546_rev_3: case e1000_82571: case e1000_80003es2lan: if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1){ e1000_read_eeprom(&adapter->hw, EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data); break; } fallthrough; 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; /* print bus type/speed/width info */ { struct e1000_hw *hw = &adapter->hw; DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ", ((hw->bus_type == e1000_bus_type_pcix) ? "-X" : (hw->bus_type == e1000_bus_type_pci_express ? " Express":"")), ((hw->bus_speed == e1000_bus_speed_2500) ? "2.5Gb/s" : (hw->bus_speed == e1000_bus_speed_133) ? "133MHz" : (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" : (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" : (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"), ((hw->bus_width == e1000_bus_width_64) ? "64-bit" : (hw->bus_width == e1000_bus_width_pciex_4) ? "Width x4" : (hw->bus_width == e1000_bus_width_pciex_1) ? "Width x1" : "32-bit")); } printk(KERN_INFO "e1000: hw "); for (i = 0; i < 6; i++) printk(KERN_CONT "%2.2x%c", netdev->dev_addr[i], i == 5 ? '\n' : ':'); /* reset the hardware with the new settings */ e1000_reset(adapter); /* If the controller is 82573 and f/w is AMT, do not set * DRV_LOAD until the interface is up. For all other cases, * let the f/w know that the h/w is now under the control * of the driver. */ if (adapter->hw.mac_type != e1000_82573 || !e1000_check_mng_mode(&adapter->hw)) e1000_get_hw_control(adapter); strcpy(netdev->name, "rteth%d"); if ((err = rt_register_rtnetdev(netdev))) goto err_register; DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n"); return 0; err_register: if (adapter->hw.flash_address) iounmap(adapter->hw.flash_address); err_flashmap: err_sw_init: err_eeprom: iounmap(adapter->hw.hw_addr); err_ioremap: rtdev_free(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 e1000_remove(struct pci_dev *pdev) { struct rtnet_device *netdev = pci_get_drvdata(pdev); struct e1000_adapter *adapter = netdev->priv; uint32_t manc; e1000_down_and_stop(adapter); if (adapter->hw.mac_type >= e1000_82540 && adapter->hw.mac_type != e1000_ich8lan && 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); } } /* Release control of h/w to f/w. If f/w is AMT enabled, this * would have already happened in close and is redundant. */ e1000_release_hw_control(adapter); rt_unregister_rtnetdev(netdev); if (!e1000_check_phy_reset_block(&adapter->hw)) e1000_phy_hw_reset(&adapter->hw); kfree(adapter->tx_ring); kfree(adapter->rx_ring); iounmap(adapter->hw.hw_addr); if (adapter->hw.flash_address) iounmap(adapter->hw.flash_address); pci_release_regions(pdev); rtdev_free(netdev); pci_disable_device(pdev); } /** * 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 e1000_sw_init(struct e1000_adapter *adapter) { struct e1000_hw *hw = &adapter->hw; struct rtnet_device *netdev = adapter->netdev; struct pci_dev *pdev = adapter->pdev; /* PCI config space info */ hw->vendor_id = pdev->vendor; hw->device_id = pdev->device; hw->subsystem_vendor_id = pdev->subsystem_vendor; hw->subsystem_id = pdev->subsystem_device; pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id); pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word); adapter->rx_buffer_len = MAXIMUM_ETHERNET_FRAME_SIZE; adapter->rx_ps_bsize0 = E1000_RXBUFFER_128; hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE; hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE; /* identify the MAC */ if (e1000_set_mac_type(hw)) { DPRINTK(PROBE, ERR, "Unknown MAC Type\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 = FALSE; /* 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; } adapter->num_tx_queues = 1; adapter->num_rx_queues = 1; if (e1000_alloc_queues(adapter)) { DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n"); return -ENOMEM; } atomic_set(&adapter->irq_sem, 1); 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 e1000_alloc_queues(struct e1000_adapter *adapter) { int size; size = sizeof(struct e1000_tx_ring) * adapter->num_tx_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_rx_queues; adapter->rx_ring = kmalloc(size, GFP_KERNEL); if (!adapter->rx_ring) { kfree(adapter->tx_ring); return -ENOMEM; } memset(adapter->rx_ring, 0, size); return E1000_SUCCESS; } /** * 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 rtnet_device *netdev) { struct e1000_adapter *adapter = netdev->priv; int err; /* disallow open during test */ if (test_bit(__E1000_DRIVER_TESTING, &adapter->flags)) return -EBUSY; /* 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; err = e1000_request_irq(adapter); if (err) goto err_up; e1000_power_up_phy(adapter); if ((err = e1000_up(adapter))) goto err_up; /* If AMT is enabled, let the firmware know that the network * interface is now open */ if (adapter->hw.mac_type == e1000_82573 && e1000_check_mng_mode(&adapter->hw)) e1000_get_hw_control(adapter); /* Wait for the hardware to come up */ msleep(3000); 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 rtnet_device *netdev) { struct e1000_adapter *adapter = netdev->priv; WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags)); e1000_down(adapter); e1000_power_down_phy(adapter); e1000_free_irq(adapter); e1000_free_all_tx_resources(adapter); e1000_free_all_rx_resources(adapter); /* If AMT is enabled, let the firmware know that the network * interface is now closed */ if (adapter->hw.mac_type == e1000_82573 && e1000_check_mng_mode(&adapter->hw)) e1000_release_hw_control(adapter); 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 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 **/ static 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); /* round up to nearest 4K */ txdr->size = txdr->count * sizeof(struct e1000_tx_desc); E1000_ROUNDUP(txdr->size, 4096); txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma, GFP_ATOMIC); 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 = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma, GFP_ATOMIC); /* Failed allocation, critical failure */ if (!txdr->desc) { dma_free_coherent(&pdev->dev, txdr->size, olddesc, olddma); goto setup_tx_desc_die; } if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) { /* give up */ dma_free_coherent(&pdev->dev, txdr->size, txdr->desc, txdr->dma); dma_free_coherent(&pdev->dev, 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 */ dma_free_coherent(&pdev->dev, txdr->size, olddesc, olddma); } } memset(txdr->desc, 0, txdr->size); txdr->next_to_use = 0; txdr->next_to_clean = 0; rtdm_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_tx_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; uint32_t ipgr1, ipgr2; /* Setup the HW Tx Head and Tail descriptor pointers */ switch (adapter->num_tx_queues) { case 1: default: tdba = adapter->tx_ring[0].dma; tdlen = adapter->tx_ring[0].count * sizeof(struct e1000_tx_desc); E1000_WRITE_REG(hw, TDLEN, tdlen); E1000_WRITE_REG(hw, TDBAH, (tdba >> 32)); E1000_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL)); E1000_WRITE_REG(hw, TDT, 0); E1000_WRITE_REG(hw, TDH, 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 */ 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; switch (hw->mac_type) { case e1000_82542_rev2_0: case e1000_82542_rev2_1: tipg = DEFAULT_82542_TIPG_IPGT; ipgr1 = DEFAULT_82542_TIPG_IPGR1; ipgr2 = DEFAULT_82542_TIPG_IPGR2; break; case e1000_80003es2lan: ipgr1 = DEFAULT_82543_TIPG_IPGR1; ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2; break; default: ipgr1 = DEFAULT_82543_TIPG_IPGR1; ipgr2 = DEFAULT_82543_TIPG_IPGR2; break; } tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT; 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_PSP | E1000_TCTL_RTLC | (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT); #ifdef DISABLE_MULR /* disable Multiple Reads for debugging */ tctl &= ~E1000_TCTL_MULR; #endif if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) { tarc = E1000_READ_REG(hw, TARC0); tarc |= ((1 << 25) | (1 << 21)); 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); } else if (hw->mac_type == e1000_80003es2lan) { tarc = E1000_READ_REG(hw, TARC0); tarc |= 1; if (hw->media_type == e1000_media_type_internal_serdes) tarc |= (1 << 20); E1000_WRITE_REG(hw, TARC0, tarc); tarc = E1000_READ_REG(hw, TARC1); tarc |= 1; 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_WRITE_REG(hw, TCTL, tctl); } /** * 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 **/ static 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 = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma, GFP_ATOMIC); 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 = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma, GFP_ATOMIC); /* Failed allocation, critical failure */ if (!rxdr->desc) { dma_free_coherent(&pdev->dev, 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 */ dma_free_coherent(&pdev->dev, rxdr->size, rxdr->desc, rxdr->dma); dma_free_coherent(&pdev->dev, 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 */ dma_free_coherent(&pdev->dev, 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_rx_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; #ifndef CONFIG_E1000_DISABLE_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); /* FIXME: disable the stripping of CRC because it breaks * BMC firmware connected over SMBUS if (adapter->hw.mac_type > e1000_82543) rctl |= E1000_RCTL_SECRC; */ 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 */ rctl &= ~E1000_RCTL_SZ_4096; rctl |= E1000_RCTL_BSEX; switch (adapter->rx_buffer_len) { case E1000_RXBUFFER_256: rctl |= E1000_RCTL_SZ_256; rctl &= ~E1000_RCTL_BSEX; break; case E1000_RXBUFFER_512: rctl |= E1000_RCTL_SZ_512; rctl &= ~E1000_RCTL_BSEX; break; case E1000_RXBUFFER_1024: rctl |= E1000_RCTL_SZ_1024; rctl &= ~E1000_RCTL_BSEX; break; 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; } adapter->rx_ps_pages = 0; 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; { rdlen = adapter->rx_ring[0].count * sizeof(struct e1000_rx_desc); adapter->clean_rx = NULL; /* unused */ 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) { ctrl_ext = E1000_READ_REG(hw, CTRL_EXT); /* Reset delay timers after every interrupt */ ctrl_ext |= E1000_CTRL_EXT_INT_TIMER_CLR; E1000_WRITE_REG(hw, CTRL_EXT, ctrl_ext); E1000_WRITE_REG(hw, IAM, ~0); 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_rx_queues) { case 1: default: rdba = adapter->rx_ring[0].dma; E1000_WRITE_REG(hw, RDLEN, rdlen); E1000_WRITE_REG(hw, RDBAH, (rdba >> 32)); E1000_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL)); E1000_WRITE_REG(hw, RDT, 0); E1000_WRITE_REG(hw, RDH, 0); adapter->rx_ring[0].rdh = E1000_RDH; adapter->rx_ring[0].rdt = E1000_RDT; break; } /* 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; } else { rxcsum &= ~E1000_RXCSUM_TUOFL; /* don't need to clear IPPCSE as it defaults to 0 */ } E1000_WRITE_REG(hw, RXCSUM, rxcsum); } /* 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 **/ static 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; dma_free_coherent(&pdev->dev, 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_tx_queues; i++) e1000_free_tx_resources(adapter, &adapter->tx_ring[i]); } static void e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter, struct e1000_buffer *buffer_info) { if (buffer_info->dma) { dma_unmap_page(&adapter->pdev->dev, buffer_info->dma, buffer_info->length, DMA_TO_DEVICE); } if (buffer_info->skb) kfree_rtskb(buffer_info->skb); memset(buffer_info, 0, sizeof(struct e1000_buffer)); } /** * 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 */ 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; tx_ring->last_tx_tso = 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_tx_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 **/ static 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; dma_free_coherent(&pdev->dev, 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_rx_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 pci_dev *pdev = adapter->pdev; unsigned long size; unsigned int i; /* Free all the Rx ring sk_buffs */ for (i = 0; i < rx_ring->count; i++) { buffer_info = &rx_ring->buffer_info[i]; if (buffer_info->skb) { dma_unmap_single(&pdev->dev, buffer_info->dma, buffer_info->length, DMA_FROM_DEVICE); kfree_rtskb(buffer_info->skb); buffer_info->skb = 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_rx_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 rtnet_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 (rtnetif_running(netdev)) e1000_clean_all_rx_rings(adapter); } static void e1000_leave_82542_rst(struct e1000_adapter *adapter) { struct rtnet_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 (rtnetif_running(netdev)) { /* No need to loop, because 82542 supports only 1 queue */ struct e1000_rx_ring *ring = &adapter->rx_ring[0]; e1000_configure_rx(adapter); adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring)); } } /** * 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 rtnet_device *netdev) { struct e1000_adapter *adapter = netdev->priv; struct e1000_hw *hw = &adapter->hw; uint32_t rctl; int i, rar_entries = E1000_RAR_ENTRIES; int mta_reg_count = (hw->mac_type == e1000_ich8lan) ? E1000_NUM_MTA_REGISTERS_ICH8LAN : E1000_NUM_MTA_REGISTERS; if (adapter->hw.mac_type == e1000_ich8lan) rar_entries = E1000_RAR_ENTRIES_ICH8LAN; /* 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 */ for (i = 1; i < rar_entries; i++) { E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0); E1000_WRITE_FLUSH(hw); E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0); E1000_WRITE_FLUSH(hw); } /* clear the old settings from the multicast hash table */ for (i = 0; i < mta_reg_count; i++) { E1000_WRITE_REG_ARRAY(hw, MTA, i, 0); E1000_WRITE_FLUSH(hw); } if (hw->mac_type == e1000_82542_rev2_0) e1000_leave_82542_rst(adapter); } /** * e1000_update_phy_info_task - get phy info * @work: work struct contained inside adapter struct * * Need to wait a few seconds after link up to get diagnostic information from * the phy */ static void e1000_update_phy_info_task(struct work_struct *work) { struct e1000_adapter *adapter = container_of(work, struct e1000_adapter, phy_info_task.work); e1000_phy_get_info(&adapter->hw, &adapter->phy_info); } /** * e1000_82547_tx_fifo_stall_task - task to complete work * @work: work struct contained inside adapter struct **/ static void e1000_82547_tx_fifo_stall_task(struct work_struct *work) { struct e1000_adapter *adapter = container_of(work, struct e1000_adapter, fifo_stall_task.work); struct rtnet_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); rtnetif_wake_queue(netdev); } else { schedule_delayed_work(&adapter->fifo_stall_task, 1); } } } /** * e1000_watchdog - work function * @work: work struct contained inside adapter struct **/ static void e1000_watchdog(struct work_struct *work) { struct e1000_adapter *adapter = container_of(work, struct e1000_adapter, watchdog_task.work); struct rtnet_device *netdev = adapter->netdev; struct e1000_tx_ring *txdr = adapter->tx_ring; uint32_t link, tctl; int32_t ret_val; ret_val = e1000_check_for_link(&adapter->hw); if ((ret_val == E1000_ERR_PHY) && (adapter->hw.phy_type == e1000_phy_igp_3) && (E1000_READ_REG(&adapter->hw, CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) { /* See e1000_kumeran_lock_loss_workaround() */ DPRINTK(LINK, INFO, "Gigabit has been disabled, downgrading speed\n"); } if (adapter->hw.mac_type == e1000_82573) { e1000_enable_tx_pkt_filtering(&adapter->hw); } if ((adapter->hw.media_type == e1000_media_type_internal_serdes) && !(E1000_READ_REG(&adapter->hw, TXCW) & E1000_TXCW_ANE)) link = !adapter->hw.serdes_link_down; else link = E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU; if (link) { if (!rtnetif_carrier_ok(netdev)) { boolean_t txb2b = 1; 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"); /* tweak tx_queue_len according to speed/duplex * and adjust the timeout factor */ // TODO makoehre netdev->tx_queue_len = adapter->tx_queue_len; adapter->tx_timeout_factor = 1; switch (adapter->link_speed) { case SPEED_10: txb2b = 0; // TODO makoehre netdev->tx_queue_len = 10; adapter->tx_timeout_factor = 8; break; case SPEED_100: txb2b = 0; // TODO makoehre netdev->tx_queue_len = 100; /* maybe add some timeout factor ? */ break; } if ((adapter->hw.mac_type == e1000_82571 || adapter->hw.mac_type == e1000_82572) && txb2b == 0) { #define SPEED_MODE_BIT (1 << 21) uint32_t tarc0; tarc0 = E1000_READ_REG(&adapter->hw, TARC0); tarc0 &= ~SPEED_MODE_BIT; E1000_WRITE_REG(&adapter->hw, TARC0, tarc0); } /* enable transmits in the hardware, need to do this * after setting TARC0 */ tctl = E1000_READ_REG(&adapter->hw, TCTL); tctl |= E1000_TCTL_EN; E1000_WRITE_REG(&adapter->hw, TCTL, tctl); rtnetif_carrier_on(netdev); rtnetif_wake_queue(netdev); schedule_delayed_work(&adapter->phy_info_task, 2 * HZ); adapter->smartspeed = 0; } } else { if (rtnetif_carrier_ok(netdev)) { adapter->link_speed = 0; adapter->link_duplex = 0; DPRINTK(LINK, INFO, "NIC Link is Down\n"); rtnetif_carrier_off(netdev); rtnetif_stop_queue(netdev); schedule_delayed_work(&adapter->phy_info_task, 2 * HZ); /* 80003ES2LAN workaround-- * For packet buffer work-around on link down event; * disable receives in the ISR and * reset device here in the watchdog */ if (adapter->hw.mac_type == e1000_80003es2lan) /* reset device */ schedule_work(&adapter->reset_task); } e1000_smartspeed(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 (!rtnetif_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). */ adapter->tx_timeout_count++; schedule_work(&adapter->reset_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); /* Reschedule the task */ schedule_delayed_work(&adapter->watchdog_task, 2 * HZ); } #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 boolean_t e1000_tx_csum(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring, struct rtskb *skb) { struct e1000_context_desc *context_desc; struct e1000_buffer *buffer_info; unsigned int i; uint8_t css; if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) { css = skb->h.raw - skb->data; i = tx_ring->next_to_use; buffer_info = &tx_ring->buffer_info[i]; 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); buffer_info->time_stamp = jiffies; 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<len; unsigned int offset = 0, size, count = 0, i; i = tx_ring->next_to_use; while (len) { buffer_info = &tx_ring->buffer_info[i]; size = min(len, max_per_txd); /* 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 = dma_map_single(&adapter->pdev->dev, skb->data + offset, size, DMA_TO_DEVICE); buffer_info->time_stamp = jiffies; len -= size; offset += size; count++; if (unlikely(++i == tx_ring->count)) i = 0; } i = (i == 0) ? tx_ring->count - 1 : i - 1; tx_ring->buffer_info[i].skb = skb; tx_ring->buffer_info[first].next_to_watch = i; return count; } static void e1000_tx_queue(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring, int tx_flags, int count, nanosecs_abs_t *xmit_stamp) { 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_CSUM)) { txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D; txd_upper |= E1000_TXD_POPTS_TXSM << 8; } 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); if (xmit_stamp) *xmit_stamp = cpu_to_be64(rtdm_clock_read() + *xmit_stamp); /* 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 int e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct rtskb *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 int e1000_transfer_dhcp_info(struct e1000_adapter *adapter, struct rtskb *skb) { struct e1000_hw *hw = &adapter->hw; uint16_t length, offset; if (skb->len > MINIMUM_DHCP_PACKET_SIZE) { 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 rtskb *skb, struct rtnet_device *netdev) { struct e1000_adapter *adapter = netdev->priv; 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; rtdm_lockctx_t context; unsigned int nr_frags = 0; unsigned int mss = 0; int count = 0; /* This goes back to the question of how to logically map a tx queue * to a flow. Right now, performance is impacted slightly negatively * if using multiple tx queues. If the stack breaks away from a * single qdisc implementation, we can look at this again. */ tx_ring = adapter->tx_ring; if (unlikely(skb->len <= 0)) { kfree_rtskb(skb); return NETDEV_TX_OK; } if (skb->ip_summed == CHECKSUM_PARTIAL) count++; 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++; if (adapter->hw.tx_pkt_filtering && (adapter->hw.mac_type == e1000_82573)) e1000_transfer_dhcp_info(adapter, skb); rtdm_lock_get_irqsave(&tx_ring->tx_lock, context); /* need: count + 2 desc gap to keep tail from touching * head, otherwise try next time */ if (unlikely(E1000_DESC_UNUSED(tx_ring) < count + 2)) { rtnetif_stop_queue(netdev); rtdm_lock_put_irqrestore(&tx_ring->tx_lock, context); rtdm_printk("FATAL: rt_e1000 ran into tail close to head situation!\n"); return NETDEV_TX_BUSY; } if (unlikely(adapter->hw.mac_type == e1000_82547)) { if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) { rtnetif_stop_queue(netdev); rtdm_lock_put_irqrestore(&tx_ring->tx_lock, context); /* FIXME: warn the user earlier, i.e. on startup if half-duplex is detected! */ rtdm_printk("FATAL: rt_e1000 ran into 82547 " "controller bug!\n"); return NETDEV_TX_BUSY; } } first = tx_ring->next_to_use; if (likely(e1000_tx_csum(adapter, tx_ring, skb))) tx_flags |= E1000_TX_FLAGS_CSUM; e1000_tx_queue(adapter, tx_ring, tx_flags, e1000_tx_map(adapter, tx_ring, skb, first, max_per_txd, nr_frags, mss), skb->xmit_stamp); rtdm_lock_put_irqrestore(&tx_ring->tx_lock, context); return NETDEV_TX_OK; } /** * e1000_intr - Interrupt Handler * @irq: interrupt number * @data: pointer to a network interface device structure * @pt_regs: CPU registers structure **/ static int e1000_intr(rtdm_irq_t *irq_handle) /* int irq, void *data, struct pt_regs *regs) */ { struct rtnet_device *netdev = rtdm_irq_get_arg(irq_handle, struct rtnet_device); struct e1000_adapter *adapter = netdev->priv; struct e1000_hw *hw = &adapter->hw; uint32_t rctl, icr = E1000_READ_REG(hw, ICR); int i; nanosecs_abs_t time_stamp = rtdm_clock_read(); if (unlikely(!icr)) { return RTDM_IRQ_NONE; /* Not our interrupt */ } if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) { hw->get_link_status = 1; /* 80003ES2LAN workaround-- * For packet buffer work-around on link down event; * disable receives here in the ISR and * reset adapter in watchdog */ if (rtnetif_carrier_ok(netdev) && (adapter->hw.mac_type == e1000_80003es2lan)) { /* disable receives */ rctl = E1000_READ_REG(hw, RCTL); E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN); } /* FIXME: we need to handle this via some yet-to-be-invented error manager (Linux botton-half and/or kthread) mod_timer(&adapter->watchdog_timer, jiffies);*/ } /* 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); } adapter->data_received = 0; for (i = 0; i < E1000_MAX_INTR; i++) if (unlikely(!e1000_clean_rx_irq(adapter, adapter->rx_ring, &time_stamp) & !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); if (adapter->data_received) rt_mark_stack_mgr(netdev); return RTDM_IRQ_HANDLED; } /** * 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 rtnet_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)) { for (cleaned = FALSE; !cleaned; ) { tx_desc = E1000_TX_DESC(*tx_ring, i); buffer_info = &tx_ring->buffer_info[i]; cleaned = (i == eop); e1000_unmap_and_free_tx_resource(adapter, buffer_info); memset(tx_desc, 0, sizeof(struct e1000_tx_desc)); if (unlikely(++i == tx_ring->count)) i = 0; } eop = tx_ring->buffer_info[i].next_to_watch; eop_desc = E1000_TX_DESC(*tx_ring, eop); } tx_ring->next_to_clean = i; #define TX_WAKE_THRESHOLD 32 if (unlikely(cleaned && rtnetif_queue_stopped(netdev) && rtnetif_carrier_ok(netdev))) { rtdm_lock_get(&tx_ring->tx_lock); if (rtnetif_queue_stopped(netdev) && (E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) rtnetif_wake_queue(netdev); rtdm_lock_put(&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[eop].dma && time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + (adapter->tx_timeout_factor * HZ)) && !(E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_TXOFF)) { /* detected Tx unit hang */ DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n" " Tx Queue <%lu>\n" " TDH <%x>\n" " TDT <%x>\n" " next_to_use <%x>\n" " next_to_clean <%x>\n" "buffer_info[next_to_clean]\n" " time_stamp <%lx>\n" " next_to_watch <%x>\n" " jiffies <%lx>\n" " next_to_watch.status <%x>\n", (unsigned long)((tx_ring - adapter->tx_ring) / sizeof(struct e1000_tx_ring)), readl(adapter->hw.hw_addr + tx_ring->tdh), readl(adapter->hw.hw_addr + tx_ring->tdt), tx_ring->next_to_use, tx_ring->next_to_clean, tx_ring->buffer_info[eop].time_stamp, eop, jiffies, eop_desc->upper.fields.status); rtnetif_stop_queue(netdev); } } 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 void e1000_rx_checksum(struct e1000_adapter *adapter, uint32_t status_err, uint32_t csum, struct rtskb *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_PARTIAL; } adapter->hw_csum_good++; } /** * e1000_clean_rx_irq - Send received data up the network stack; legacy * @adapter: board private structure **/ static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter, struct e1000_rx_ring *rx_ring, nanosecs_abs_t *time_stamp) { struct rtnet_device *netdev = adapter->netdev; struct pci_dev *pdev = adapter->pdev; struct e1000_rx_desc *rx_desc, *next_rxd; struct e1000_buffer *buffer_info, *next_buffer; uint32_t length; uint8_t last_byte; unsigned int i; int cleaned_count = 0; boolean_t cleaned = FALSE; i = rx_ring->next_to_clean; rx_desc = E1000_RX_DESC(*rx_ring, i); buffer_info = &rx_ring->buffer_info[i]; while (rx_desc->status & E1000_RXD_STAT_DD) { struct rtskb *skb, *next_skb; u8 status; status = rx_desc->status; skb = buffer_info->skb; buffer_info->skb = NULL; prefetch(skb->data - NET_IP_ALIGN); if (++i == rx_ring->count) i = 0; next_rxd = E1000_RX_DESC(*rx_ring, i); prefetch(next_rxd); next_buffer = &rx_ring->buffer_info[i]; next_skb = next_buffer->skb; prefetch(next_skb->data - NET_IP_ALIGN); cleaned = TRUE; cleaned_count++; dma_unmap_single(&pdev->dev, buffer_info->dma, buffer_info->length, DMA_FROM_DEVICE); length = le16_to_cpu(rx_desc->length); if (unlikely(!(status & E1000_RXD_STAT_EOP))) { /* All receives must fit into a single buffer */ E1000_DBG("%s: Receive packet consumed multiple" " buffers\n", netdev->name); /* recycle */ buffer_info->skb = 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, status, rx_desc->errors, length, last_byte)) { length--; } else { /* recycle */ buffer_info->skb = skb; goto next_desc; } } /* code added for copybreak, this should improve * performance for small packets with large amounts * of reassembly being done in the stack */ rtskb_put(skb, length); /* end copybreak code */ /* Receive Checksum Offload */ e1000_rx_checksum(adapter, (uint32_t)(status) | ((uint32_t)(rx_desc->errors) << 24), le16_to_cpu(rx_desc->csum), skb); skb->protocol = rt_eth_type_trans(skb, netdev); skb->time_stamp = *time_stamp; rtnetif_rx(skb); adapter->data_received = 1; // Set flag for the main interrupt routine next_desc: rx_desc->status = 0; /* return some buffers to hardware, one at a time is too slow */ if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) { adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count); cleaned_count = 0; } /* use prefetched values */ rx_desc = next_rxd; buffer_info = next_buffer; } rx_ring->next_to_clean = i; cleaned_count = E1000_DESC_UNUSED(rx_ring); if (cleaned_count) adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count); 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, int cleaned_count) { struct rtnet_device *netdev = adapter->netdev; struct pci_dev *pdev = adapter->pdev; struct e1000_rx_desc *rx_desc; struct e1000_buffer *buffer_info; struct rtskb *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 (cleaned_count--) { if (!(skb = buffer_info->skb)) skb = rtnetdev_alloc_rtskb(netdev, bufsz); else { rtskb_trim(skb, 0); goto map_skb; } if (unlikely(!skb)) { /* Better luck next round */ adapter->alloc_rx_buff_failed++; break; } /* Fix for errata 23, can't cross 64kB boundary */ if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) { struct rtskb *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 = rtnetdev_alloc_rtskb(netdev, bufsz); /* Failed allocation, critical failure */ if (!skb) { kfree_rtskb(oldskb); break; } if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) { /* give up */ kfree_rtskb(skb); kfree_rtskb(oldskb); break; /* while !buffer_info->skb */ } else { /* Use new allocation */ kfree_rtskb(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 */ rtskb_reserve(skb, NET_IP_ALIGN); buffer_info->skb = skb; buffer_info->length = adapter->rx_buffer_len; map_skb: buffer_info->dma = dma_map_single(&pdev->dev, skb->data, adapter->rx_buffer_len, DMA_FROM_DEVICE); /* 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); kfree_rtskb(skb); buffer_info->skb = NULL; dma_unmap_single(&pdev->dev, buffer_info->dma, adapter->rx_buffer_len, DMA_FROM_DEVICE); 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 == rx_ring->count)) i = 0; buffer_info = &rx_ring->buffer_info[i]; } if (likely(rx_ring->next_to_use != i)) { rx_ring->next_to_use = i; if (unlikely(i-- == 0)) i = (rx_ring->count - 1); /* 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); } } /** * 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; } 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); } 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; }