ab@2053: /*******************************************************************************
ab@2053: 
ab@2053:   Intel PRO/1000 Linux driver
ab@2053:   Copyright(c) 1999 - 2006 Intel Corporation.
ab@2053: 
ab@2053:   This program is free software; you can redistribute it and/or modify it
ab@2053:   under the terms and conditions of the GNU General Public License,
ab@2053:   version 2, as published by the Free Software Foundation.
ab@2053: 
ab@2053:   This program is distributed in the hope it will be useful, but WITHOUT
ab@2053:   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
ab@2053:   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
ab@2053:   more details.
ab@2053: 
ab@2053:   You should have received a copy of the GNU General Public License along with
ab@2053:   this program; if not, write to the Free Software Foundation, Inc.,
ab@2053:   51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
ab@2053: 
ab@2053:   The full GNU General Public License is included in this distribution in
ab@2053:   the file called "COPYING".
ab@2053: 
ab@2053:   Contact Information:
ab@2053:   Linux NICS <linux.nics@intel.com>
ab@2053:   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
ab@2053:   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
ab@2053: 
ab@2053:   vim: noexpandtab
ab@2053: 
ab@2053: *******************************************************************************/
ab@2053: 
ab@2053: #include "e1000-2.6.33-ethercat.h"
ab@2053: #include <net/ip6_checksum.h>
ab@2053: 
ab@2053: char e1000_driver_name[] = "ec_e1000";
ab@2053: static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
ab@2053: #define DRV_VERSION "7.3.21-k5-NAPI"
ab@2053: const char e1000_driver_version[] = DRV_VERSION;
ab@2053: static const char e1000_copyright[] = "Copyright (c) 1999-2006 Intel Corporation.";
ab@2053: 
ab@2053: /* e1000_pci_tbl - PCI Device ID Table
ab@2053:  *
ab@2053:  * Last entry must be all 0s
ab@2053:  *
ab@2053:  * Macro expands to...
ab@2053:  *   {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
ab@2053:  */
ab@2053: static struct pci_device_id e1000_pci_tbl[] = {
ab@2053: 	INTEL_E1000_ETHERNET_DEVICE(0x1000),
ab@2053: 	INTEL_E1000_ETHERNET_DEVICE(0x1001),
ab@2053: 	INTEL_E1000_ETHERNET_DEVICE(0x1004),
ab@2053: 	INTEL_E1000_ETHERNET_DEVICE(0x1008),
ab@2053: 	INTEL_E1000_ETHERNET_DEVICE(0x1009),
ab@2053: 	INTEL_E1000_ETHERNET_DEVICE(0x100C),
ab@2053: 	INTEL_E1000_ETHERNET_DEVICE(0x100D),
ab@2053: 	INTEL_E1000_ETHERNET_DEVICE(0x100E),
ab@2053: 	INTEL_E1000_ETHERNET_DEVICE(0x100F),
ab@2053: 	INTEL_E1000_ETHERNET_DEVICE(0x1010),
ab@2053: 	INTEL_E1000_ETHERNET_DEVICE(0x1011),
ab@2053: 	INTEL_E1000_ETHERNET_DEVICE(0x1012),
ab@2053: 	INTEL_E1000_ETHERNET_DEVICE(0x1013),
ab@2053: 	INTEL_E1000_ETHERNET_DEVICE(0x1014),
ab@2053: 	INTEL_E1000_ETHERNET_DEVICE(0x1015),
ab@2053: 	INTEL_E1000_ETHERNET_DEVICE(0x1016),
ab@2053: 	INTEL_E1000_ETHERNET_DEVICE(0x1017),
ab@2053: 	INTEL_E1000_ETHERNET_DEVICE(0x1018),
ab@2053: 	INTEL_E1000_ETHERNET_DEVICE(0x1019),
ab@2053: 	INTEL_E1000_ETHERNET_DEVICE(0x101A),
ab@2053: 	INTEL_E1000_ETHERNET_DEVICE(0x101D),
ab@2053: 	INTEL_E1000_ETHERNET_DEVICE(0x101E),
ab@2053: 	INTEL_E1000_ETHERNET_DEVICE(0x1026),
ab@2053: 	INTEL_E1000_ETHERNET_DEVICE(0x1027),
ab@2053: 	INTEL_E1000_ETHERNET_DEVICE(0x1028),
ab@2053: 	INTEL_E1000_ETHERNET_DEVICE(0x1075),
ab@2053: 	INTEL_E1000_ETHERNET_DEVICE(0x1076),
ab@2053: 	INTEL_E1000_ETHERNET_DEVICE(0x1077),
ab@2053: 	INTEL_E1000_ETHERNET_DEVICE(0x1078),
ab@2053: 	INTEL_E1000_ETHERNET_DEVICE(0x1079),
ab@2053: 	INTEL_E1000_ETHERNET_DEVICE(0x107A),
ab@2053: 	INTEL_E1000_ETHERNET_DEVICE(0x107B),
ab@2053: 	INTEL_E1000_ETHERNET_DEVICE(0x107C),
ab@2053: 	INTEL_E1000_ETHERNET_DEVICE(0x108A),
ab@2053: 	INTEL_E1000_ETHERNET_DEVICE(0x1099),
ab@2053: 	INTEL_E1000_ETHERNET_DEVICE(0x10B5),
ab@2053: 	/* required last entry */
ab@2053: 	{0,}
ab@2053: };
ab@2053: 
ab@2053: // do not auto-load driver
ab@2053: // MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
ab@2053: 
ab@2053: int e1000_up(struct e1000_adapter *adapter);
ab@2053: void e1000_down(struct e1000_adapter *adapter);
ab@2053: void e1000_reinit_locked(struct e1000_adapter *adapter);
ab@2053: void e1000_reset(struct e1000_adapter *adapter);
ab@2053: int e1000_set_spd_dplx(struct e1000_adapter *adapter, u16 spddplx);
ab@2053: int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);
ab@2053: int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
ab@2053: void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
ab@2053: void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
ab@2053: static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
ab@2053:                              struct e1000_tx_ring *txdr);
ab@2053: static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
ab@2053:                              struct e1000_rx_ring *rxdr);
ab@2053: static void e1000_free_tx_resources(struct e1000_adapter *adapter,
ab@2053:                              struct e1000_tx_ring *tx_ring);
ab@2053: static void e1000_free_rx_resources(struct e1000_adapter *adapter,
ab@2053:                              struct e1000_rx_ring *rx_ring);
ab@2053: void e1000_update_stats(struct e1000_adapter *adapter);
ab@2053: 
ab@2053: static int e1000_init_module(void);
ab@2053: static void e1000_exit_module(void);
ab@2053: static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
ab@2053: static void __devexit e1000_remove(struct pci_dev *pdev);
ab@2053: static int e1000_alloc_queues(struct e1000_adapter *adapter);
ab@2053: static int e1000_sw_init(struct e1000_adapter *adapter);
ab@2053: static int e1000_open(struct net_device *netdev);
ab@2053: static int e1000_close(struct net_device *netdev);
ab@2053: static void e1000_configure_tx(struct e1000_adapter *adapter);
ab@2053: static void e1000_configure_rx(struct e1000_adapter *adapter);
ab@2053: static void e1000_setup_rctl(struct e1000_adapter *adapter);
ab@2053: static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
ab@2053: static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
ab@2053: static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
ab@2053:                                 struct e1000_tx_ring *tx_ring);
ab@2053: static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
ab@2053:                                 struct e1000_rx_ring *rx_ring);
ab@2053: static void e1000_set_rx_mode(struct net_device *netdev);
ab@2053: static void e1000_update_phy_info(unsigned long data);
ab@2053: static void e1000_watchdog(unsigned long data);
ab@2053: static void e1000_82547_tx_fifo_stall(unsigned long data);
ab@2053: static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
ab@2053: 				    struct net_device *netdev);
ab@2053: static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
ab@2053: static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
ab@2053: static int e1000_set_mac(struct net_device *netdev, void *p);
ab@2053: void ec_poll(struct net_device *);
ab@2053: static irqreturn_t e1000_intr(int irq, void *data);
ab@2053: static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
ab@2053: 			       struct e1000_tx_ring *tx_ring);
ab@2053: static int e1000_clean(struct napi_struct *napi, int budget);
ab@2053: static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
ab@2053: 			       struct e1000_rx_ring *rx_ring,
ab@2053: 			       int *work_done, int work_to_do);
ab@2053: static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
ab@2053: 				     struct e1000_rx_ring *rx_ring,
ab@2053: 				     int *work_done, int work_to_do);
ab@2053: static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
ab@2053: 				   struct e1000_rx_ring *rx_ring,
ab@2053: 				   int cleaned_count);
ab@2053: static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
ab@2053: 					 struct e1000_rx_ring *rx_ring,
ab@2053: 					 int cleaned_count);
ab@2053: static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
ab@2053: static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
ab@2053: 			   int cmd);
ab@2053: static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
ab@2053: static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
ab@2053: static void e1000_tx_timeout(struct net_device *dev);
ab@2053: static void e1000_reset_task(struct work_struct *work);
ab@2053: static void e1000_smartspeed(struct e1000_adapter *adapter);
ab@2053: static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
ab@2053:                                        struct sk_buff *skb);
ab@2053: 
ab@2053: static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
ab@2053: static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid);
ab@2053: static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid);
ab@2053: static void e1000_restore_vlan(struct e1000_adapter *adapter);
ab@2053: 
ab@2053: #ifdef CONFIG_PM
ab@2053: static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
ab@2053: static int e1000_resume(struct pci_dev *pdev);
ab@2053: #endif
ab@2053: static void e1000_shutdown(struct pci_dev *pdev);
ab@2053: 
ab@2053: #ifdef CONFIG_NET_POLL_CONTROLLER
ab@2053: /* for netdump / net console */
ab@2053: static void e1000_netpoll (struct net_device *netdev);
ab@2053: #endif
ab@2053: 
ab@2053: #define COPYBREAK_DEFAULT 256
ab@2053: static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT;
ab@2053: module_param(copybreak, uint, 0644);
ab@2053: MODULE_PARM_DESC(copybreak,
ab@2053: 	"Maximum size of packet that is copied to a new buffer on receive");
ab@2053: 
ab@2053: static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
ab@2053:                      pci_channel_state_t state);
ab@2053: static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
ab@2053: static void e1000_io_resume(struct pci_dev *pdev);
ab@2053: 
ab@2053: static struct pci_error_handlers e1000_err_handler = {
ab@2053: 	.error_detected = e1000_io_error_detected,
ab@2053: 	.slot_reset = e1000_io_slot_reset,
ab@2053: 	.resume = e1000_io_resume,
ab@2053: };
ab@2053: 
ab@2053: static struct pci_driver e1000_driver = {
ab@2053: 	.name     = e1000_driver_name,
ab@2053: 	.id_table = e1000_pci_tbl,
ab@2053: 	.probe    = e1000_probe,
ab@2053: 	.remove   = __devexit_p(e1000_remove),
ab@2053: #ifdef CONFIG_PM
ab@2053: 	/* Power Managment Hooks */
ab@2053: 	.suspend  = e1000_suspend,
ab@2053: 	.resume   = e1000_resume,
ab@2053: #endif
ab@2053: 	.shutdown = e1000_shutdown,
ab@2053: 	.err_handler = &e1000_err_handler
ab@2053: };
ab@2053: 
ab@2053: MODULE_AUTHOR("Florian Pose <fp@igh-essen.com>");
ab@2053: MODULE_DESCRIPTION("EtherCAT-capable Intel(R) PRO/1000 Network Driver");
ab@2053: MODULE_LICENSE("GPL");
ab@2053: MODULE_VERSION(DRV_VERSION);
ab@2053: 
ab@2053: static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
ab@2053: module_param(debug, int, 0);
ab@2053: MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_init_module - Driver Registration Routine
ab@2053:  *
ab@2053:  * e1000_init_module is the first routine called when the driver is
ab@2053:  * loaded. All it does is register with the PCI subsystem.
ab@2053:  **/
ab@2053: 
ab@2053: static int __init e1000_init_module(void)
ab@2053: {
ab@2053: 	int ret;
ab@2053: 	printk(KERN_INFO "%s - version %s\n",
ab@2053: 	       e1000_driver_string, e1000_driver_version);
ab@2053: 
ab@2053: 	printk(KERN_INFO "%s\n", e1000_copyright);
ab@2053: 
ab@2053: 	ret = pci_register_driver(&e1000_driver);
ab@2053: 	if (copybreak != COPYBREAK_DEFAULT) {
ab@2053: 		if (copybreak == 0)
ab@2053: 			printk(KERN_INFO "e1000: copybreak disabled\n");
ab@2053: 		else
ab@2053: 			printk(KERN_INFO "e1000: copybreak enabled for "
ab@2053: 			       "packets <= %u bytes\n", copybreak);
ab@2053: 	}
ab@2053: 	return ret;
ab@2053: }
ab@2053: 
ab@2053: module_init(e1000_init_module);
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_exit_module - Driver Exit Cleanup Routine
ab@2053:  *
ab@2053:  * e1000_exit_module is called just before the driver is removed
ab@2053:  * from memory.
ab@2053:  **/
ab@2053: 
ab@2053: static void __exit e1000_exit_module(void)
ab@2053: {
ab@2053: 	pci_unregister_driver(&e1000_driver);
ab@2053: }
ab@2053: 
ab@2053: module_exit(e1000_exit_module);
ab@2053: 
ab@2053: static int e1000_request_irq(struct e1000_adapter *adapter)
ab@2053: {
ab@2053: 	struct net_device *netdev = adapter->netdev;
ab@2053: 	irq_handler_t handler = e1000_intr;
ab@2053: 	int irq_flags = IRQF_SHARED;
ab@2053: 	int err;
ab@2053: 
ab@2053: 	if (adapter->ecdev)
ab@2053: 		return 0;
ab@2053: 
ab@2053: 	err = request_irq(adapter->pdev->irq, handler, irq_flags, netdev->name,
ab@2053: 	                  netdev);
ab@2053: 	if (err) {
ab@2053: 		DPRINTK(PROBE, ERR,
ab@2053: 		        "Unable to allocate interrupt Error: %d\n", err);
ab@2053: 	}
ab@2053: 
ab@2053: 	return err;
ab@2053: }
ab@2053: 
ab@2053: static void e1000_free_irq(struct e1000_adapter *adapter)
ab@2053: {
ab@2053: 	struct net_device *netdev = adapter->netdev;
ab@2053: 
ab@2053: 	if (adapter->ecdev)
ab@2053: 		return;
ab@2053: 
ab@2053: 	free_irq(adapter->pdev->irq, netdev);
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_irq_disable - Mask off interrupt generation on the NIC
ab@2053:  * @adapter: board private structure
ab@2053:  **/
ab@2053: 
ab@2053: static void e1000_irq_disable(struct e1000_adapter *adapter)
ab@2053: {
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 
ab@2053: 	if (adapter->ecdev)
ab@2053: 		return;
ab@2053: 
ab@2053: 	ew32(IMC, ~0);
ab@2053: 	E1000_WRITE_FLUSH();
ab@2053: 	synchronize_irq(adapter->pdev->irq);
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_irq_enable - Enable default interrupt generation settings
ab@2053:  * @adapter: board private structure
ab@2053:  **/
ab@2053: 
ab@2053: static void e1000_irq_enable(struct e1000_adapter *adapter)
ab@2053: {
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 
ab@2053: 	if (adapter->ecdev)
ab@2053: 		return;
ab@2053:  
ab@2053: 	ew32(IMS, IMS_ENABLE_MASK);
ab@2053: 	E1000_WRITE_FLUSH();
ab@2053: }
ab@2053: 
ab@2053: static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
ab@2053: {
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	struct net_device *netdev = adapter->netdev;
ab@2053: 	u16 vid = hw->mng_cookie.vlan_id;
ab@2053: 	u16 old_vid = adapter->mng_vlan_id;
ab@2053: 	if (adapter->vlgrp) {
ab@2053: 		if (!vlan_group_get_device(adapter->vlgrp, vid)) {
ab@2053: 			if (hw->mng_cookie.status &
ab@2053: 				E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
ab@2053: 				e1000_vlan_rx_add_vid(netdev, vid);
ab@2053: 				adapter->mng_vlan_id = vid;
ab@2053: 			} else
ab@2053: 				adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
ab@2053: 
ab@2053: 			if ((old_vid != (u16)E1000_MNG_VLAN_NONE) &&
ab@2053: 					(vid != old_vid) &&
ab@2053: 			    !vlan_group_get_device(adapter->vlgrp, old_vid))
ab@2053: 				e1000_vlan_rx_kill_vid(netdev, old_vid);
ab@2053: 		} else
ab@2053: 			adapter->mng_vlan_id = vid;
ab@2053: 	}
ab@2053: }
ab@2053: 
ab@2053: static void e1000_init_manageability(struct e1000_adapter *adapter)
ab@2053: {
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 
ab@2053: 	if (adapter->en_mng_pt) {
ab@2053: 		u32 manc = er32(MANC);
ab@2053: 
ab@2053: 		/* disable hardware interception of ARP */
ab@2053: 		manc &= ~(E1000_MANC_ARP_EN);
ab@2053: 
ab@2053: 		ew32(MANC, manc);
ab@2053: 	}
ab@2053: }
ab@2053: 
ab@2053: static void e1000_release_manageability(struct e1000_adapter *adapter)
ab@2053: {
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 
ab@2053: 	if (adapter->en_mng_pt) {
ab@2053: 		u32 manc = er32(MANC);
ab@2053: 
ab@2053: 		/* re-enable hardware interception of ARP */
ab@2053: 		manc |= E1000_MANC_ARP_EN;
ab@2053: 
ab@2053: 		ew32(MANC, manc);
ab@2053: 	}
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_configure - configure the hardware for RX and TX
ab@2053:  * @adapter = private board structure
ab@2053:  **/
ab@2053: static void e1000_configure(struct e1000_adapter *adapter)
ab@2053: {
ab@2053: 	struct net_device *netdev = adapter->netdev;
ab@2053: 	int i;
ab@2053: 
ab@2053: 	e1000_set_rx_mode(netdev);
ab@2053: 
ab@2053: 	e1000_restore_vlan(adapter);
ab@2053: 	e1000_init_manageability(adapter);
ab@2053: 
ab@2053: 	e1000_configure_tx(adapter);
ab@2053: 	e1000_setup_rctl(adapter);
ab@2053: 	e1000_configure_rx(adapter);
ab@2053: 	/* call E1000_DESC_UNUSED which always leaves
ab@2053: 	 * at least 1 descriptor unused to make sure
ab@2053: 	 * next_to_use != next_to_clean */
ab@2053: 	for (i = 0; i < adapter->num_rx_queues; i++) {
ab@2053: 		struct e1000_rx_ring *ring = &adapter->rx_ring[i];
ab@2053: 		if (adapter->ecdev) {
ab@2053: 			/* fill rx ring completely! */
ab@2053: 			adapter->alloc_rx_buf(adapter, ring, ring->count);
ab@2053: 		} else {
ab@2053:             /* this one leaves the last ring element unallocated! */
ab@2053: 			adapter->alloc_rx_buf(adapter, ring,
ab@2053: 					E1000_DESC_UNUSED(ring));
ab@2053: 		}
ab@2053: 	}
ab@2053: 
ab@2053: 	adapter->tx_queue_len = netdev->tx_queue_len;
ab@2053: }
ab@2053: 
ab@2053: int e1000_up(struct e1000_adapter *adapter)
ab@2053: {
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 
ab@2053: 	/* hardware has been reset, we need to reload some things */
ab@2053: 	e1000_configure(adapter);
ab@2053: 
ab@2053: 	clear_bit(__E1000_DOWN, &adapter->flags);
ab@2053: 
ab@2053: 	if (!adapter->ecdev) {
ab@2053: 		napi_enable(&adapter->napi);
ab@2053: 
ab@2053: 		e1000_irq_enable(adapter);
ab@2053: 
ab@2053: 		netif_wake_queue(adapter->netdev);
ab@2053: 
ab@2053: 		/* fire a link change interrupt to start the watchdog */
ab@2053: 		ew32(ICS, E1000_ICS_LSC);
ab@2053: 	}
ab@2053: 	return 0;
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_power_up_phy - restore link in case the phy was powered down
ab@2053:  * @adapter: address of board private structure
ab@2053:  *
ab@2053:  * The phy may be powered down to save power and turn off link when the
ab@2053:  * driver is unloaded and wake on lan is not enabled (among others)
ab@2053:  * *** this routine MUST be followed by a call to e1000_reset ***
ab@2053:  *
ab@2053:  **/
ab@2053: 
ab@2053: void e1000_power_up_phy(struct e1000_adapter *adapter)
ab@2053: {
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	u16 mii_reg = 0;
ab@2053: 
ab@2053: 	/* Just clear the power down bit to wake the phy back up */
ab@2053: 	if (hw->media_type == e1000_media_type_copper) {
ab@2053: 		/* according to the manual, the phy will retain its
ab@2053: 		 * settings across a power-down/up cycle */
ab@2053: 		e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
ab@2053: 		mii_reg &= ~MII_CR_POWER_DOWN;
ab@2053: 		e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
ab@2053: 	}
ab@2053: }
ab@2053: 
ab@2053: static void e1000_power_down_phy(struct e1000_adapter *adapter)
ab@2053: {
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 
ab@2053: 	/* Power down the PHY so no link is implied when interface is down *
ab@2053: 	 * The PHY cannot be powered down if any of the following is true *
ab@2053: 	 * (a) WoL is enabled
ab@2053: 	 * (b) AMT is active
ab@2053: 	 * (c) SoL/IDER session is active */
ab@2053: 	if (!adapter->wol && hw->mac_type >= e1000_82540 &&
ab@2053: 	   hw->media_type == e1000_media_type_copper) {
ab@2053: 		u16 mii_reg = 0;
ab@2053: 
ab@2053: 		switch (hw->mac_type) {
ab@2053: 		case e1000_82540:
ab@2053: 		case e1000_82545:
ab@2053: 		case e1000_82545_rev_3:
ab@2053: 		case e1000_82546:
ab@2053: 		case e1000_82546_rev_3:
ab@2053: 		case e1000_82541:
ab@2053: 		case e1000_82541_rev_2:
ab@2053: 		case e1000_82547:
ab@2053: 		case e1000_82547_rev_2:
ab@2053: 			if (er32(MANC) & E1000_MANC_SMBUS_EN)
ab@2053: 				goto out;
ab@2053: 			break;
ab@2053: 		default:
ab@2053: 			goto out;
ab@2053: 		}
ab@2053: 		e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
ab@2053: 		mii_reg |= MII_CR_POWER_DOWN;
ab@2053: 		e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
ab@2053: 		mdelay(1);
ab@2053: 	}
ab@2053: out:
ab@2053: 	return;
ab@2053: }
ab@2053: 
ab@2053: void e1000_down(struct e1000_adapter *adapter)
ab@2053: {
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	struct net_device *netdev = adapter->netdev;
ab@2053: 	u32 rctl, tctl;
ab@2053: 
ab@2053: 	/* signal that we're down so the interrupt handler does not
ab@2053: 	 * reschedule our watchdog timer */
ab@2053: 	set_bit(__E1000_DOWN, &adapter->flags);
ab@2053: 
ab@2053: 	/* disable receives in the hardware */	
ab@2053: 	rctl = er32(RCTL);
ab@2053: 	ew32(RCTL, rctl & ~E1000_RCTL_EN);
ab@2053: 
ab@2053: 	if (!adapter->ecdev) {
ab@2053: 		/* flush and sleep below */
ab@2053: 		netif_tx_disable(netdev);
ab@2053: 	}
ab@2053: 
ab@2053: 	/* disable transmits in the hardware */
ab@2053: 	tctl = er32(TCTL);
ab@2053: 	tctl &= ~E1000_TCTL_EN;
ab@2053: 	ew32(TCTL, tctl);
ab@2053: 	/* flush both disables and wait for them to finish */
ab@2053: 	E1000_WRITE_FLUSH();
ab@2053: 	msleep(10);
ab@2053: 
ab@2053: 	if (!adapter->ecdev) {
ab@2053: 		napi_disable(&adapter->napi);
ab@2053: 
ab@2053: 		e1000_irq_disable(adapter);
ab@2053: 
ab@2053: 		del_timer_sync(&adapter->tx_fifo_stall_timer);
ab@2053: 		del_timer_sync(&adapter->watchdog_timer);
ab@2053: 		del_timer_sync(&adapter->phy_info_timer);
ab@2053: 	}
ab@2053: 
ab@2053: 	netdev->tx_queue_len = adapter->tx_queue_len;
ab@2053: 	adapter->link_speed = 0;
ab@2053: 	adapter->link_duplex = 0;
ab@2053: 	if (!adapter->ecdev) {
ab@2053: 		netif_carrier_off(netdev);
ab@2053: 	}
ab@2053: 
ab@2053: 	e1000_reset(adapter);
ab@2053: 	e1000_clean_all_tx_rings(adapter);
ab@2053: 	e1000_clean_all_rx_rings(adapter);
ab@2053: }
ab@2053: 
ab@2053: void e1000_reinit_locked(struct e1000_adapter *adapter)
ab@2053: {
ab@2053: 	WARN_ON(in_interrupt());
ab@2053: 	while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
ab@2053: 		msleep(1);
ab@2053: 	e1000_down(adapter);
ab@2053: 	e1000_up(adapter);
ab@2053: 	clear_bit(__E1000_RESETTING, &adapter->flags);
ab@2053: }
ab@2053: 
ab@2053: void e1000_reset(struct e1000_adapter *adapter)
ab@2053: {
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	u32 pba = 0, tx_space, min_tx_space, min_rx_space;
ab@2053: 	bool legacy_pba_adjust = false;
ab@2053: 	u16 hwm;
ab@2053: 
ab@2053: 	/* Repartition Pba for greater than 9k mtu
ab@2053: 	 * To take effect CTRL.RST is required.
ab@2053: 	 */
ab@2053: 
ab@2053: 	switch (hw->mac_type) {
ab@2053: 	case e1000_82542_rev2_0:
ab@2053: 	case e1000_82542_rev2_1:
ab@2053: 	case e1000_82543:
ab@2053: 	case e1000_82544:
ab@2053: 	case e1000_82540:
ab@2053: 	case e1000_82541:
ab@2053: 	case e1000_82541_rev_2:
ab@2053: 		legacy_pba_adjust = true;
ab@2053: 		pba = E1000_PBA_48K;
ab@2053: 		break;
ab@2053: 	case e1000_82545:
ab@2053: 	case e1000_82545_rev_3:
ab@2053: 	case e1000_82546:
ab@2053: 	case e1000_82546_rev_3:
ab@2053: 		pba = E1000_PBA_48K;
ab@2053: 		break;
ab@2053: 	case e1000_82547:
ab@2053: 	case e1000_82547_rev_2:
ab@2053: 		legacy_pba_adjust = true;
ab@2053: 		pba = E1000_PBA_30K;
ab@2053: 		break;
ab@2053: 	case e1000_undefined:
ab@2053: 	case e1000_num_macs:
ab@2053: 		break;
ab@2053: 	}
ab@2053: 
ab@2053: 	if (legacy_pba_adjust) {
ab@2053: 		if (hw->max_frame_size > E1000_RXBUFFER_8192)
ab@2053: 			pba -= 8; /* allocate more FIFO for Tx */
ab@2053: 
ab@2053: 		if (hw->mac_type == e1000_82547) {
ab@2053: 			adapter->tx_fifo_head = 0;
ab@2053: 			adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
ab@2053: 			adapter->tx_fifo_size =
ab@2053: 				(E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
ab@2053: 			atomic_set(&adapter->tx_fifo_stall, 0);
ab@2053: 		}
ab@2053: 	} else if (hw->max_frame_size >  ETH_FRAME_LEN + ETH_FCS_LEN) {
ab@2053: 		/* adjust PBA for jumbo frames */
ab@2053: 		ew32(PBA, pba);
ab@2053: 
ab@2053: 		/* To maintain wire speed transmits, the Tx FIFO should be
ab@2053: 		 * large enough to accommodate two full transmit packets,
ab@2053: 		 * rounded up to the next 1KB and expressed in KB.  Likewise,
ab@2053: 		 * the Rx FIFO should be large enough to accommodate at least
ab@2053: 		 * one full receive packet and is similarly rounded up and
ab@2053: 		 * expressed in KB. */
ab@2053: 		pba = er32(PBA);
ab@2053: 		/* upper 16 bits has Tx packet buffer allocation size in KB */
ab@2053: 		tx_space = pba >> 16;
ab@2053: 		/* lower 16 bits has Rx packet buffer allocation size in KB */
ab@2053: 		pba &= 0xffff;
ab@2053: 		/*
ab@2053: 		 * the tx fifo also stores 16 bytes of information about the tx
ab@2053: 		 * but don't include ethernet FCS because hardware appends it
ab@2053: 		 */
ab@2053: 		min_tx_space = (hw->max_frame_size +
ab@2053: 		                sizeof(struct e1000_tx_desc) -
ab@2053: 		                ETH_FCS_LEN) * 2;
ab@2053: 		min_tx_space = ALIGN(min_tx_space, 1024);
ab@2053: 		min_tx_space >>= 10;
ab@2053: 		/* software strips receive CRC, so leave room for it */
ab@2053: 		min_rx_space = hw->max_frame_size;
ab@2053: 		min_rx_space = ALIGN(min_rx_space, 1024);
ab@2053: 		min_rx_space >>= 10;
ab@2053: 
ab@2053: 		/* If current Tx allocation is less than the min Tx FIFO size,
ab@2053: 		 * and the min Tx FIFO size is less than the current Rx FIFO
ab@2053: 		 * allocation, take space away from current Rx allocation */
ab@2053: 		if (tx_space < min_tx_space &&
ab@2053: 		    ((min_tx_space - tx_space) < pba)) {
ab@2053: 			pba = pba - (min_tx_space - tx_space);
ab@2053: 
ab@2053: 			/* PCI/PCIx hardware has PBA alignment constraints */
ab@2053: 			switch (hw->mac_type) {
ab@2053: 			case e1000_82545 ... e1000_82546_rev_3:
ab@2053: 				pba &= ~(E1000_PBA_8K - 1);
ab@2053: 				break;
ab@2053: 			default:
ab@2053: 				break;
ab@2053: 			}
ab@2053: 
ab@2053: 			/* if short on rx space, rx wins and must trump tx
ab@2053: 			 * adjustment or use Early Receive if available */
ab@2053: 			if (pba < min_rx_space)
ab@2053: 				pba = min_rx_space;
ab@2053: 		}
ab@2053: 	}
ab@2053: 
ab@2053: 	ew32(PBA, pba);
ab@2053: 
ab@2053: 	/*
ab@2053: 	 * flow control settings:
ab@2053: 	 * The high water mark must be low enough to fit one full frame
ab@2053: 	 * (or the size used for early receive) above it in the Rx FIFO.
ab@2053: 	 * Set it to the lower of:
ab@2053: 	 * - 90% of the Rx FIFO size, and
ab@2053: 	 * - the full Rx FIFO size minus the early receive size (for parts
ab@2053: 	 *   with ERT support assuming ERT set to E1000_ERT_2048), or
ab@2053: 	 * - the full Rx FIFO size minus one full frame
ab@2053: 	 */
ab@2053: 	hwm = min(((pba << 10) * 9 / 10),
ab@2053: 		  ((pba << 10) - hw->max_frame_size));
ab@2053: 
ab@2053: 	hw->fc_high_water = hwm & 0xFFF8;	/* 8-byte granularity */
ab@2053: 	hw->fc_low_water = hw->fc_high_water - 8;
ab@2053: 	hw->fc_pause_time = E1000_FC_PAUSE_TIME;
ab@2053: 	hw->fc_send_xon = 1;
ab@2053: 	hw->fc = hw->original_fc;
ab@2053: 
ab@2053: 	/* Allow time for pending master requests to run */
ab@2053: 	e1000_reset_hw(hw);
ab@2053: 	if (hw->mac_type >= e1000_82544)
ab@2053: 		ew32(WUC, 0);
ab@2053: 
ab@2053: 	if (e1000_init_hw(hw))
ab@2053: 		DPRINTK(PROBE, ERR, "Hardware Error\n");
ab@2053: 	e1000_update_mng_vlan(adapter);
ab@2053: 
ab@2053: 	/* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
ab@2053: 	if (hw->mac_type >= e1000_82544 &&
ab@2053: 	    hw->autoneg == 1 &&
ab@2053: 	    hw->autoneg_advertised == ADVERTISE_1000_FULL) {
ab@2053: 		u32 ctrl = er32(CTRL);
ab@2053: 		/* clear phy power management bit if we are in gig only mode,
ab@2053: 		 * which if enabled will attempt negotiation to 100Mb, which
ab@2053: 		 * can cause a loss of link at power off or driver unload */
ab@2053: 		ctrl &= ~E1000_CTRL_SWDPIN3;
ab@2053: 		ew32(CTRL, ctrl);
ab@2053: 	}
ab@2053: 
ab@2053: 	/* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
ab@2053: 	ew32(VET, ETHERNET_IEEE_VLAN_TYPE);
ab@2053: 
ab@2053: 	e1000_reset_adaptive(hw);
ab@2053: 	e1000_phy_get_info(hw, &adapter->phy_info);
ab@2053: 
ab@2053: 	e1000_release_manageability(adapter);
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  *  Dump the eeprom for users having checksum issues
ab@2053:  **/
ab@2053: static void e1000_dump_eeprom(struct e1000_adapter *adapter)
ab@2053: {
ab@2053: 	struct net_device *netdev = adapter->netdev;
ab@2053: 	struct ethtool_eeprom eeprom;
ab@2053: 	const struct ethtool_ops *ops = netdev->ethtool_ops;
ab@2053: 	u8 *data;
ab@2053: 	int i;
ab@2053: 	u16 csum_old, csum_new = 0;
ab@2053: 
ab@2053: 	eeprom.len = ops->get_eeprom_len(netdev);
ab@2053: 	eeprom.offset = 0;
ab@2053: 
ab@2053: 	data = kmalloc(eeprom.len, GFP_KERNEL);
ab@2053: 	if (!data) {
ab@2053: 		printk(KERN_ERR "Unable to allocate memory to dump EEPROM"
ab@2053: 		       " data\n");
ab@2053: 		return;
ab@2053: 	}
ab@2053: 
ab@2053: 	ops->get_eeprom(netdev, &eeprom, data);
ab@2053: 
ab@2053: 	csum_old = (data[EEPROM_CHECKSUM_REG * 2]) +
ab@2053: 		   (data[EEPROM_CHECKSUM_REG * 2 + 1] << 8);
ab@2053: 	for (i = 0; i < EEPROM_CHECKSUM_REG * 2; i += 2)
ab@2053: 		csum_new += data[i] + (data[i + 1] << 8);
ab@2053: 	csum_new = EEPROM_SUM - csum_new;
ab@2053: 
ab@2053: 	printk(KERN_ERR "/*********************/\n");
ab@2053: 	printk(KERN_ERR "Current EEPROM Checksum : 0x%04x\n", csum_old);
ab@2053: 	printk(KERN_ERR "Calculated              : 0x%04x\n", csum_new);
ab@2053: 
ab@2053: 	printk(KERN_ERR "Offset    Values\n");
ab@2053: 	printk(KERN_ERR "========  ======\n");
ab@2053: 	print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1, data, 128, 0);
ab@2053: 
ab@2053: 	printk(KERN_ERR "Include this output when contacting your support "
ab@2053: 	       "provider.\n");
ab@2053: 	printk(KERN_ERR "This is not a software error! Something bad "
ab@2053: 	       "happened to your hardware or\n");
ab@2053: 	printk(KERN_ERR "EEPROM image. Ignoring this "
ab@2053: 	       "problem could result in further problems,\n");
ab@2053: 	printk(KERN_ERR "possibly loss of data, corruption or system hangs!\n");
ab@2053: 	printk(KERN_ERR "The MAC Address will be reset to 00:00:00:00:00:00, "
ab@2053: 	       "which is invalid\n");
ab@2053: 	printk(KERN_ERR "and requires you to set the proper MAC "
ab@2053: 	       "address manually before continuing\n");
ab@2053: 	printk(KERN_ERR "to enable this network device.\n");
ab@2053: 	printk(KERN_ERR "Please inspect the EEPROM dump and report the issue "
ab@2053: 	       "to your hardware vendor\n");
ab@2053: 	printk(KERN_ERR "or Intel Customer Support.\n");
ab@2053: 	printk(KERN_ERR "/*********************/\n");
ab@2053: 
ab@2053: 	kfree(data);
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_is_need_ioport - determine if an adapter needs ioport resources or not
ab@2053:  * @pdev: PCI device information struct
ab@2053:  *
ab@2053:  * Return true if an adapter needs ioport resources
ab@2053:  **/
ab@2053: static int e1000_is_need_ioport(struct pci_dev *pdev)
ab@2053: {
ab@2053: 	switch (pdev->device) {
ab@2053: 	case E1000_DEV_ID_82540EM:
ab@2053: 	case E1000_DEV_ID_82540EM_LOM:
ab@2053: 	case E1000_DEV_ID_82540EP:
ab@2053: 	case E1000_DEV_ID_82540EP_LOM:
ab@2053: 	case E1000_DEV_ID_82540EP_LP:
ab@2053: 	case E1000_DEV_ID_82541EI:
ab@2053: 	case E1000_DEV_ID_82541EI_MOBILE:
ab@2053: 	case E1000_DEV_ID_82541ER:
ab@2053: 	case E1000_DEV_ID_82541ER_LOM:
ab@2053: 	case E1000_DEV_ID_82541GI:
ab@2053: 	case E1000_DEV_ID_82541GI_LF:
ab@2053: 	case E1000_DEV_ID_82541GI_MOBILE:
ab@2053: 	case E1000_DEV_ID_82544EI_COPPER:
ab@2053: 	case E1000_DEV_ID_82544EI_FIBER:
ab@2053: 	case E1000_DEV_ID_82544GC_COPPER:
ab@2053: 	case E1000_DEV_ID_82544GC_LOM:
ab@2053: 	case E1000_DEV_ID_82545EM_COPPER:
ab@2053: 	case E1000_DEV_ID_82545EM_FIBER:
ab@2053: 	case E1000_DEV_ID_82546EB_COPPER:
ab@2053: 	case E1000_DEV_ID_82546EB_FIBER:
ab@2053: 	case E1000_DEV_ID_82546EB_QUAD_COPPER:
ab@2053: 		return true;
ab@2053: 	default:
ab@2053: 		return false;
ab@2053: 	}
ab@2053: }
ab@2053: 
ab@2053: static const struct net_device_ops e1000_netdev_ops = {
ab@2053: 	.ndo_open		= e1000_open,
ab@2053: 	.ndo_stop		= e1000_close,
ab@2053: 	.ndo_start_xmit		= e1000_xmit_frame,
ab@2053: 	.ndo_get_stats		= e1000_get_stats,
ab@2053: 	.ndo_set_rx_mode	= e1000_set_rx_mode,
ab@2053: 	.ndo_set_mac_address	= e1000_set_mac,
ab@2053: 	.ndo_tx_timeout 	= e1000_tx_timeout,
ab@2053: 	.ndo_change_mtu		= e1000_change_mtu,
ab@2053: 	.ndo_do_ioctl		= e1000_ioctl,
ab@2053: 	.ndo_validate_addr	= eth_validate_addr,
ab@2053: 
ab@2053: 	.ndo_vlan_rx_register	= e1000_vlan_rx_register,
ab@2053: 	.ndo_vlan_rx_add_vid	= e1000_vlan_rx_add_vid,
ab@2053: 	.ndo_vlan_rx_kill_vid	= e1000_vlan_rx_kill_vid,
ab@2053: #ifdef CONFIG_NET_POLL_CONTROLLER
ab@2053: 	.ndo_poll_controller	= e1000_netpoll,
ab@2053: #endif
ab@2053: };
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_probe - Device Initialization Routine
ab@2053:  * @pdev: PCI device information struct
ab@2053:  * @ent: entry in e1000_pci_tbl
ab@2053:  *
ab@2053:  * Returns 0 on success, negative on failure
ab@2053:  *
ab@2053:  * e1000_probe initializes an adapter identified by a pci_dev structure.
ab@2053:  * The OS initialization, configuring of the adapter private structure,
ab@2053:  * and a hardware reset occur.
ab@2053:  **/
ab@2053: static int __devinit e1000_probe(struct pci_dev *pdev,
ab@2053: 				 const struct pci_device_id *ent)
ab@2053: {
ab@2053: 	struct net_device *netdev;
ab@2053: 	struct e1000_adapter *adapter;
ab@2053: 	struct e1000_hw *hw;
ab@2053: 
ab@2053: 	static int cards_found = 0;
ab@2053: 	static int global_quad_port_a = 0; /* global ksp3 port a indication */
ab@2053: 	int i, err, pci_using_dac;
ab@2053: 	u16 eeprom_data = 0;
ab@2053: 	u16 eeprom_apme_mask = E1000_EEPROM_APME;
ab@2053: 	int bars, need_ioport;
ab@2053: 
ab@2053: 	/* do not allocate ioport bars when not needed */
ab@2053: 	need_ioport = e1000_is_need_ioport(pdev);
ab@2053: 	if (need_ioport) {
ab@2053: 		bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO);
ab@2053: 		err = pci_enable_device(pdev);
ab@2053: 	} else {
ab@2053: 		bars = pci_select_bars(pdev, IORESOURCE_MEM);
ab@2053: 		err = pci_enable_device_mem(pdev);
ab@2053: 	}
ab@2053: 	if (err)
ab@2053: 		return err;
ab@2053: 
ab@2053: 	if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) &&
ab@2053: 	    !pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) {
ab@2053: 		pci_using_dac = 1;
ab@2053: 	} else {
ab@2053: 		err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
ab@2053: 		if (err) {
ab@2053: 			err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
ab@2053: 			if (err) {
ab@2053: 				E1000_ERR("No usable DMA configuration, "
ab@2053: 					  "aborting\n");
ab@2053: 				goto err_dma;
ab@2053: 			}
ab@2053: 		}
ab@2053: 		pci_using_dac = 0;
ab@2053: 	}
ab@2053: 
ab@2053: 	err = pci_request_selected_regions(pdev, bars, e1000_driver_name);
ab@2053: 	if (err)
ab@2053: 		goto err_pci_reg;
ab@2053: 
ab@2053: 	pci_set_master(pdev);
ab@2053: 
ab@2053: 	err = -ENOMEM;
ab@2053: 	netdev = alloc_etherdev(sizeof(struct e1000_adapter));
ab@2053: 	if (!netdev)
ab@2053: 		goto err_alloc_etherdev;
ab@2053: 
ab@2053: 	SET_NETDEV_DEV(netdev, &pdev->dev);
ab@2053: 
ab@2053: 	pci_set_drvdata(pdev, netdev);
ab@2053: 	adapter = netdev_priv(netdev);
ab@2053: 	adapter->netdev = netdev;
ab@2053: 	adapter->pdev = pdev;
ab@2053: 	adapter->msg_enable = (1 << debug) - 1;
ab@2053: 	adapter->bars = bars;
ab@2053: 	adapter->need_ioport = need_ioport;
ab@2053: 
ab@2053: 	hw = &adapter->hw;
ab@2053: 	hw->back = adapter;
ab@2053: 
ab@2053: 	err = -EIO;
ab@2053: 	hw->hw_addr = pci_ioremap_bar(pdev, BAR_0);
ab@2053: 	if (!hw->hw_addr)
ab@2053: 		goto err_ioremap;
ab@2053: 
ab@2053: 	if (adapter->need_ioport) {
ab@2053: 		for (i = BAR_1; i <= BAR_5; i++) {
ab@2053: 			if (pci_resource_len(pdev, i) == 0)
ab@2053: 				continue;
ab@2053: 			if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
ab@2053: 				hw->io_base = pci_resource_start(pdev, i);
ab@2053: 				break;
ab@2053: 			}
ab@2053: 		}
ab@2053: 	}
ab@2053: 
ab@2053: 	netdev->netdev_ops = &e1000_netdev_ops;
ab@2053: 	e1000_set_ethtool_ops(netdev);
ab@2053: 	netdev->watchdog_timeo = 5 * HZ;
ab@2053: 	netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
ab@2053: 
ab@2053: 	strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
ab@2053: 
ab@2053: 	adapter->bd_number = cards_found;
ab@2053: 
ab@2053: 	/* setup the private structure */
ab@2053: 
ab@2053: 	err = e1000_sw_init(adapter);
ab@2053: 	if (err)
ab@2053: 		goto err_sw_init;
ab@2053: 
ab@2053: 	err = -EIO;
ab@2053: 
ab@2053: 	if (hw->mac_type >= e1000_82543) {
ab@2053: 		netdev->features = NETIF_F_SG |
ab@2053: 				   NETIF_F_HW_CSUM |
ab@2053: 				   NETIF_F_HW_VLAN_TX |
ab@2053: 				   NETIF_F_HW_VLAN_RX |
ab@2053: 				   NETIF_F_HW_VLAN_FILTER;
ab@2053: 	}
ab@2053: 
ab@2053: 	if ((hw->mac_type >= e1000_82544) &&
ab@2053: 	   (hw->mac_type != e1000_82547))
ab@2053: 		netdev->features |= NETIF_F_TSO;
ab@2053: 
ab@2053: 	if (pci_using_dac)
ab@2053: 		netdev->features |= NETIF_F_HIGHDMA;
ab@2053: 
ab@2053: 	netdev->vlan_features |= NETIF_F_TSO;
ab@2053: 	netdev->vlan_features |= NETIF_F_HW_CSUM;
ab@2053: 	netdev->vlan_features |= NETIF_F_SG;
ab@2053: 
ab@2053: 	adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw);
ab@2053: 
ab@2053: 	/* initialize eeprom parameters */
ab@2053: 	if (e1000_init_eeprom_params(hw)) {
ab@2053: 		E1000_ERR("EEPROM initialization failed\n");
ab@2053: 		goto err_eeprom;
ab@2053: 	}
ab@2053: 
ab@2053: 	/* before reading the EEPROM, reset the controller to
ab@2053: 	 * put the device in a known good starting state */
ab@2053: 
ab@2053: 	e1000_reset_hw(hw);
ab@2053: 
ab@2053: 	/* make sure the EEPROM is good */
ab@2053: 	if (e1000_validate_eeprom_checksum(hw) < 0) {
ab@2053: 		DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
ab@2053: 		e1000_dump_eeprom(adapter);
ab@2053: 		/*
ab@2053: 		 * set MAC address to all zeroes to invalidate and temporary
ab@2053: 		 * disable this device for the user. This blocks regular
ab@2053: 		 * traffic while still permitting ethtool ioctls from reaching
ab@2053: 		 * the hardware as well as allowing the user to run the
ab@2053: 		 * interface after manually setting a hw addr using
ab@2053: 		 * `ip set address`
ab@2053: 		 */
ab@2053: 		memset(hw->mac_addr, 0, netdev->addr_len);
ab@2053: 	} else {
ab@2053: 		/* copy the MAC address out of the EEPROM */
ab@2053: 		if (e1000_read_mac_addr(hw))
ab@2053: 			DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
ab@2053: 	}
ab@2053: 	/* don't block initalization here due to bad MAC address */
ab@2053: 	memcpy(netdev->dev_addr, hw->mac_addr, netdev->addr_len);
ab@2053: 	memcpy(netdev->perm_addr, hw->mac_addr, netdev->addr_len);
ab@2053: 
ab@2053: 	if (!is_valid_ether_addr(netdev->perm_addr))
ab@2053: 		DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
ab@2053: 
ab@2053: 	e1000_get_bus_info(hw);
ab@2053: 
ab@2053: 	init_timer(&adapter->tx_fifo_stall_timer);
ab@2053: 	adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
ab@2053: 	adapter->tx_fifo_stall_timer.data = (unsigned long)adapter;
ab@2053: 
ab@2053: 	init_timer(&adapter->watchdog_timer);
ab@2053: 	adapter->watchdog_timer.function = &e1000_watchdog;
ab@2053: 	adapter->watchdog_timer.data = (unsigned long) adapter;
ab@2053: 
ab@2053: 	init_timer(&adapter->phy_info_timer);
ab@2053: 	adapter->phy_info_timer.function = &e1000_update_phy_info;
ab@2053: 	adapter->phy_info_timer.data = (unsigned long)adapter;
ab@2053: 
ab@2053: 	INIT_WORK(&adapter->reset_task, e1000_reset_task);
ab@2053: 
ab@2053: 	e1000_check_options(adapter);
ab@2053: 
ab@2053: 	/* Initial Wake on LAN setting
ab@2053: 	 * If APM wake is enabled in the EEPROM,
ab@2053: 	 * enable the ACPI Magic Packet filter
ab@2053: 	 */
ab@2053: 
ab@2053: 	switch (hw->mac_type) {
ab@2053: 	case e1000_82542_rev2_0:
ab@2053: 	case e1000_82542_rev2_1:
ab@2053: 	case e1000_82543:
ab@2053: 		break;
ab@2053: 	case e1000_82544:
ab@2053: 		e1000_read_eeprom(hw,
ab@2053: 			EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
ab@2053: 		eeprom_apme_mask = E1000_EEPROM_82544_APM;
ab@2053: 		break;
ab@2053: 	case e1000_82546:
ab@2053: 	case e1000_82546_rev_3:
ab@2053: 		if (er32(STATUS) & E1000_STATUS_FUNC_1){
ab@2053: 			e1000_read_eeprom(hw,
ab@2053: 				EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
ab@2053: 			break;
ab@2053: 		}
ab@2053: 		/* Fall Through */
ab@2053: 	default:
ab@2053: 		e1000_read_eeprom(hw,
ab@2053: 			EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
ab@2053: 		break;
ab@2053: 	}
ab@2053: 	if (eeprom_data & eeprom_apme_mask)
ab@2053: 		adapter->eeprom_wol |= E1000_WUFC_MAG;
ab@2053: 
ab@2053: 	/* now that we have the eeprom settings, apply the special cases
ab@2053: 	 * where the eeprom may be wrong or the board simply won't support
ab@2053: 	 * wake on lan on a particular port */
ab@2053: 	switch (pdev->device) {
ab@2053: 	case E1000_DEV_ID_82546GB_PCIE:
ab@2053: 		adapter->eeprom_wol = 0;
ab@2053: 		break;
ab@2053: 	case E1000_DEV_ID_82546EB_FIBER:
ab@2053: 	case E1000_DEV_ID_82546GB_FIBER:
ab@2053: 		/* Wake events only supported on port A for dual fiber
ab@2053: 		 * regardless of eeprom setting */
ab@2053: 		if (er32(STATUS) & E1000_STATUS_FUNC_1)
ab@2053: 			adapter->eeprom_wol = 0;
ab@2053: 		break;
ab@2053: 	case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
ab@2053: 		/* if quad port adapter, disable WoL on all but port A */
ab@2053: 		if (global_quad_port_a != 0)
ab@2053: 			adapter->eeprom_wol = 0;
ab@2053: 		else
ab@2053: 			adapter->quad_port_a = 1;
ab@2053: 		/* Reset for multiple quad port adapters */
ab@2053: 		if (++global_quad_port_a == 4)
ab@2053: 			global_quad_port_a = 0;
ab@2053: 		break;
ab@2053: 	}
ab@2053: 
ab@2053: 	/* initialize the wol settings based on the eeprom settings */
ab@2053: 	adapter->wol = adapter->eeprom_wol;
ab@2053: 	device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
ab@2053: 
ab@2053: 	/* print bus type/speed/width info */
ab@2053: 	DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ",
ab@2053: 		((hw->bus_type == e1000_bus_type_pcix) ? "-X" : ""),
ab@2053: 		((hw->bus_speed == e1000_bus_speed_133) ? "133MHz" :
ab@2053: 		 (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" :
ab@2053: 		 (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" :
ab@2053: 		 (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"),
ab@2053: 		((hw->bus_width == e1000_bus_width_64) ? "64-bit" : "32-bit"));
ab@2053: 
ab@2053: 	printk("%pM\n", netdev->dev_addr);
ab@2053: 
ab@2053: 	/* reset the hardware with the new settings */
ab@2053: 	e1000_reset(adapter);
ab@2053: 
ab@2053:  	// offer device to EtherCAT master module
ab@2053: 	adapter->ecdev = ecdev_offer(netdev, ec_poll, THIS_MODULE);
ab@2053: 	if (adapter->ecdev) {
ab@2053: 		if (ecdev_open(adapter->ecdev)) {
ab@2053: 			ecdev_withdraw(adapter->ecdev);
ab@2053: 			goto err_register;
ab@2053: 		}
ab@2053: 	} else {
ab@2053: 		strcpy(netdev->name, "eth%d");
ab@2053: 		err = register_netdev(netdev);
ab@2053: 		if (err)
ab@2053: 			goto err_register;
ab@2053: 
ab@2053: 		/* carrier off reporting is important to ethtool even BEFORE open */
ab@2053: 		netif_carrier_off(netdev);
ab@2053: 	}
ab@2053: 
ab@2053: 	DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
ab@2053: 
ab@2053: 	cards_found++;
ab@2053: 	return 0;
ab@2053: 
ab@2053: err_register:
ab@2053: err_eeprom:
ab@2053: 	e1000_phy_hw_reset(hw);
ab@2053: 
ab@2053: 	if (hw->flash_address)
ab@2053: 		iounmap(hw->flash_address);
ab@2053: 	kfree(adapter->tx_ring);
ab@2053: 	kfree(adapter->rx_ring);
ab@2053: err_sw_init:
ab@2053: 	iounmap(hw->hw_addr);
ab@2053: err_ioremap:
ab@2053: 	free_netdev(netdev);
ab@2053: err_alloc_etherdev:
ab@2053: 	pci_release_selected_regions(pdev, bars);
ab@2053: err_pci_reg:
ab@2053: err_dma:
ab@2053: 	pci_disable_device(pdev);
ab@2053: 	return err;
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_remove - Device Removal Routine
ab@2053:  * @pdev: PCI device information struct
ab@2053:  *
ab@2053:  * e1000_remove is called by the PCI subsystem to alert the driver
ab@2053:  * that it should release a PCI device.  The could be caused by a
ab@2053:  * Hot-Plug event, or because the driver is going to be removed from
ab@2053:  * memory.
ab@2053:  **/
ab@2053: 
ab@2053: static void __devexit e1000_remove(struct pci_dev *pdev)
ab@2053: {
ab@2053: 	struct net_device *netdev = pci_get_drvdata(pdev);
ab@2053: 	struct e1000_adapter *adapter = netdev_priv(netdev);
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 
ab@2053: 	set_bit(__E1000_DOWN, &adapter->flags);
ab@2053: 
ab@2053: 	if (!adapter->ecdev) {
ab@2053: 		del_timer_sync(&adapter->tx_fifo_stall_timer);
ab@2053: 		del_timer_sync(&adapter->watchdog_timer);
ab@2053: 		del_timer_sync(&adapter->phy_info_timer);
ab@2053: 	}
ab@2053: 
ab@2053: 	cancel_work_sync(&adapter->reset_task);
ab@2053: 
ab@2053: 	e1000_release_manageability(adapter);
ab@2053: 
ab@2053: 	if (adapter->ecdev) {
ab@2053: 		ecdev_close(adapter->ecdev);
ab@2053: 		ecdev_withdraw(adapter->ecdev);
ab@2053: 	} else {
ab@2053: 		unregister_netdev(netdev);
ab@2053: 	}
ab@2053: 
ab@2053: 	e1000_phy_hw_reset(hw);
ab@2053: 
ab@2053: 	kfree(adapter->tx_ring);
ab@2053: 	kfree(adapter->rx_ring);
ab@2053: 
ab@2053: 	iounmap(hw->hw_addr);
ab@2053: 	if (hw->flash_address)
ab@2053: 		iounmap(hw->flash_address);
ab@2053: 	pci_release_selected_regions(pdev, adapter->bars);
ab@2053: 
ab@2053: 	free_netdev(netdev);
ab@2053: 
ab@2053: 	pci_disable_device(pdev);
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
ab@2053:  * @adapter: board private structure to initialize
ab@2053:  *
ab@2053:  * e1000_sw_init initializes the Adapter private data structure.
ab@2053:  * Fields are initialized based on PCI device information and
ab@2053:  * OS network device settings (MTU size).
ab@2053:  **/
ab@2053: 
ab@2053: static int __devinit e1000_sw_init(struct e1000_adapter *adapter)
ab@2053: {
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	struct net_device *netdev = adapter->netdev;
ab@2053: 	struct pci_dev *pdev = adapter->pdev;
ab@2053: 
ab@2053: 	/* PCI config space info */
ab@2053: 
ab@2053: 	hw->vendor_id = pdev->vendor;
ab@2053: 	hw->device_id = pdev->device;
ab@2053: 	hw->subsystem_vendor_id = pdev->subsystem_vendor;
ab@2053: 	hw->subsystem_id = pdev->subsystem_device;
ab@2053: 	hw->revision_id = pdev->revision;
ab@2053: 
ab@2053: 	pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
ab@2053: 
ab@2053: 	adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
ab@2053: 	hw->max_frame_size = netdev->mtu +
ab@2053: 			     ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
ab@2053: 	hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
ab@2053: 
ab@2053: 	/* identify the MAC */
ab@2053: 
ab@2053: 	if (e1000_set_mac_type(hw)) {
ab@2053: 		DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
ab@2053: 		return -EIO;
ab@2053: 	}
ab@2053: 
ab@2053: 	switch (hw->mac_type) {
ab@2053: 	default:
ab@2053: 		break;
ab@2053: 	case e1000_82541:
ab@2053: 	case e1000_82547:
ab@2053: 	case e1000_82541_rev_2:
ab@2053: 	case e1000_82547_rev_2:
ab@2053: 		hw->phy_init_script = 1;
ab@2053: 		break;
ab@2053: 	}
ab@2053: 
ab@2053: 	e1000_set_media_type(hw);
ab@2053: 
ab@2053: 	hw->wait_autoneg_complete = false;
ab@2053: 	hw->tbi_compatibility_en = true;
ab@2053: 	hw->adaptive_ifs = true;
ab@2053: 
ab@2053: 	/* Copper options */
ab@2053: 
ab@2053: 	if (hw->media_type == e1000_media_type_copper) {
ab@2053: 		hw->mdix = AUTO_ALL_MODES;
ab@2053: 		hw->disable_polarity_correction = false;
ab@2053: 		hw->master_slave = E1000_MASTER_SLAVE;
ab@2053: 	}
ab@2053: 
ab@2053: 	adapter->num_tx_queues = 1;
ab@2053: 	adapter->num_rx_queues = 1;
ab@2053: 
ab@2053: 	if (e1000_alloc_queues(adapter)) {
ab@2053: 		DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
ab@2053: 		return -ENOMEM;
ab@2053: 	}
ab@2053: 
ab@2053: 	/* Explicitly disable IRQ since the NIC can be in any state. */
ab@2053: 	e1000_irq_disable(adapter);
ab@2053: 
ab@2053: 	spin_lock_init(&adapter->stats_lock);
ab@2053: 
ab@2053: 	set_bit(__E1000_DOWN, &adapter->flags);
ab@2053: 
ab@2053: 	return 0;
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_alloc_queues - Allocate memory for all rings
ab@2053:  * @adapter: board private structure to initialize
ab@2053:  *
ab@2053:  * We allocate one ring per queue at run-time since we don't know the
ab@2053:  * number of queues at compile-time.
ab@2053:  **/
ab@2053: 
ab@2053: static int __devinit e1000_alloc_queues(struct e1000_adapter *adapter)
ab@2053: {
ab@2053: 	adapter->tx_ring = kcalloc(adapter->num_tx_queues,
ab@2053: 	                           sizeof(struct e1000_tx_ring), GFP_KERNEL);
ab@2053: 	if (!adapter->tx_ring)
ab@2053: 		return -ENOMEM;
ab@2053: 
ab@2053: 	adapter->rx_ring = kcalloc(adapter->num_rx_queues,
ab@2053: 	                           sizeof(struct e1000_rx_ring), GFP_KERNEL);
ab@2053: 	if (!adapter->rx_ring) {
ab@2053: 		kfree(adapter->tx_ring);
ab@2053: 		return -ENOMEM;
ab@2053: 	}
ab@2053: 
ab@2053: 	return E1000_SUCCESS;
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_open - Called when a network interface is made active
ab@2053:  * @netdev: network interface device structure
ab@2053:  *
ab@2053:  * Returns 0 on success, negative value on failure
ab@2053:  *
ab@2053:  * The open entry point is called when a network interface is made
ab@2053:  * active by the system (IFF_UP).  At this point all resources needed
ab@2053:  * for transmit and receive operations are allocated, the interrupt
ab@2053:  * handler is registered with the OS, the watchdog timer is started,
ab@2053:  * and the stack is notified that the interface is ready.
ab@2053:  **/
ab@2053: 
ab@2053: static int e1000_open(struct net_device *netdev)
ab@2053: {
ab@2053: 	struct e1000_adapter *adapter = netdev_priv(netdev);
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	int err;
ab@2053: 
ab@2053: 	/* disallow open during test */
ab@2053: 	if (test_bit(__E1000_TESTING, &adapter->flags))
ab@2053: 		return -EBUSY;
ab@2053: 
ab@2053: 	netif_carrier_off(netdev);
ab@2053: 
ab@2053: 	/* allocate transmit descriptors */
ab@2053: 	err = e1000_setup_all_tx_resources(adapter);
ab@2053: 	if (err)
ab@2053: 		goto err_setup_tx;
ab@2053: 
ab@2053: 	/* allocate receive descriptors */
ab@2053: 	err = e1000_setup_all_rx_resources(adapter);
ab@2053: 	if (err)
ab@2053: 		goto err_setup_rx;
ab@2053: 
ab@2053: 	e1000_power_up_phy(adapter);
ab@2053: 
ab@2053: 	adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
ab@2053: 	if ((hw->mng_cookie.status &
ab@2053: 			  E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
ab@2053: 		e1000_update_mng_vlan(adapter);
ab@2053: 	}
ab@2053: 
ab@2053: 	/* before we allocate an interrupt, we must be ready to handle it.
ab@2053: 	 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
ab@2053: 	 * as soon as we call pci_request_irq, so we have to setup our
ab@2053: 	 * clean_rx handler before we do so.  */
ab@2053: 	e1000_configure(adapter);
ab@2053: 
ab@2053: 	err = e1000_request_irq(adapter);
ab@2053: 	if (err)
ab@2053: 		goto err_req_irq;
ab@2053: 
ab@2053: 	/* From here on the code is the same as e1000_up() */
ab@2053: 	clear_bit(__E1000_DOWN, &adapter->flags);
ab@2053: 
ab@2053: 	napi_enable(&adapter->napi);
ab@2053: 
ab@2053: 	e1000_irq_enable(adapter);
ab@2053: 
ab@2053: 	netif_start_queue(netdev);
ab@2053: 
ab@2053: 	/* fire a link status change interrupt to start the watchdog */
ab@2053: 	ew32(ICS, E1000_ICS_LSC);
ab@2053: 
ab@2053: 	return E1000_SUCCESS;
ab@2053: 
ab@2053: err_req_irq:
ab@2053: 	e1000_power_down_phy(adapter);
ab@2053: 	e1000_free_all_rx_resources(adapter);
ab@2053: err_setup_rx:
ab@2053: 	e1000_free_all_tx_resources(adapter);
ab@2053: err_setup_tx:
ab@2053: 	e1000_reset(adapter);
ab@2053: 
ab@2053: 	return err;
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_close - Disables a network interface
ab@2053:  * @netdev: network interface device structure
ab@2053:  *
ab@2053:  * Returns 0, this is not allowed to fail
ab@2053:  *
ab@2053:  * The close entry point is called when an interface is de-activated
ab@2053:  * by the OS.  The hardware is still under the drivers control, but
ab@2053:  * needs to be disabled.  A global MAC reset is issued to stop the
ab@2053:  * hardware, and all transmit and receive resources are freed.
ab@2053:  **/
ab@2053: 
ab@2053: static int e1000_close(struct net_device *netdev)
ab@2053: {
ab@2053: 	struct e1000_adapter *adapter = netdev_priv(netdev);
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 
ab@2053: 	WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
ab@2053: 	e1000_down(adapter);
ab@2053: 	e1000_power_down_phy(adapter);
ab@2053: 	e1000_free_irq(adapter);
ab@2053: 
ab@2053: 	e1000_free_all_tx_resources(adapter);
ab@2053: 	e1000_free_all_rx_resources(adapter);
ab@2053: 
ab@2053: 	/* kill manageability vlan ID if supported, but not if a vlan with
ab@2053: 	 * the same ID is registered on the host OS (let 8021q kill it) */
ab@2053: 	if ((hw->mng_cookie.status &
ab@2053: 			  E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
ab@2053: 	     !(adapter->vlgrp &&
ab@2053: 	       vlan_group_get_device(adapter->vlgrp, adapter->mng_vlan_id))) {
ab@2053: 		e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
ab@2053: 	}
ab@2053: 
ab@2053: 	return 0;
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
ab@2053:  * @adapter: address of board private structure
ab@2053:  * @start: address of beginning of memory
ab@2053:  * @len: length of memory
ab@2053:  **/
ab@2053: static bool e1000_check_64k_bound(struct e1000_adapter *adapter, void *start,
ab@2053: 				  unsigned long len)
ab@2053: {
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	unsigned long begin = (unsigned long)start;
ab@2053: 	unsigned long end = begin + len;
ab@2053: 
ab@2053: 	/* First rev 82545 and 82546 need to not allow any memory
ab@2053: 	 * write location to cross 64k boundary due to errata 23 */
ab@2053: 	if (hw->mac_type == e1000_82545 ||
ab@2053: 	    hw->mac_type == e1000_82546) {
ab@2053: 		return ((begin ^ (end - 1)) >> 16) != 0 ? false : true;
ab@2053: 	}
ab@2053: 
ab@2053: 	return true;
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
ab@2053:  * @adapter: board private structure
ab@2053:  * @txdr:    tx descriptor ring (for a specific queue) to setup
ab@2053:  *
ab@2053:  * Return 0 on success, negative on failure
ab@2053:  **/
ab@2053: 
ab@2053: static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
ab@2053: 				    struct e1000_tx_ring *txdr)
ab@2053: {
ab@2053: 	struct pci_dev *pdev = adapter->pdev;
ab@2053: 	int size;
ab@2053: 
ab@2053: 	size = sizeof(struct e1000_buffer) * txdr->count;
ab@2053: 	txdr->buffer_info = vmalloc(size);
ab@2053: 	if (!txdr->buffer_info) {
ab@2053: 		DPRINTK(PROBE, ERR,
ab@2053: 		"Unable to allocate memory for the transmit descriptor ring\n");
ab@2053: 		return -ENOMEM;
ab@2053: 	}
ab@2053: 	memset(txdr->buffer_info, 0, size);
ab@2053: 
ab@2053: 	/* round up to nearest 4K */
ab@2053: 
ab@2053: 	txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
ab@2053: 	txdr->size = ALIGN(txdr->size, 4096);
ab@2053: 
ab@2053: 	txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
ab@2053: 	if (!txdr->desc) {
ab@2053: setup_tx_desc_die:
ab@2053: 		vfree(txdr->buffer_info);
ab@2053: 		DPRINTK(PROBE, ERR,
ab@2053: 		"Unable to allocate memory for the transmit descriptor ring\n");
ab@2053: 		return -ENOMEM;
ab@2053: 	}
ab@2053: 
ab@2053: 	/* Fix for errata 23, can't cross 64kB boundary */
ab@2053: 	if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
ab@2053: 		void *olddesc = txdr->desc;
ab@2053: 		dma_addr_t olddma = txdr->dma;
ab@2053: 		DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
ab@2053: 				     "at %p\n", txdr->size, txdr->desc);
ab@2053: 		/* Try again, without freeing the previous */
ab@2053: 		txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
ab@2053: 		/* Failed allocation, critical failure */
ab@2053: 		if (!txdr->desc) {
ab@2053: 			pci_free_consistent(pdev, txdr->size, olddesc, olddma);
ab@2053: 			goto setup_tx_desc_die;
ab@2053: 		}
ab@2053: 
ab@2053: 		if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
ab@2053: 			/* give up */
ab@2053: 			pci_free_consistent(pdev, txdr->size, txdr->desc,
ab@2053: 					    txdr->dma);
ab@2053: 			pci_free_consistent(pdev, txdr->size, olddesc, olddma);
ab@2053: 			DPRINTK(PROBE, ERR,
ab@2053: 				"Unable to allocate aligned memory "
ab@2053: 				"for the transmit descriptor ring\n");
ab@2053: 			vfree(txdr->buffer_info);
ab@2053: 			return -ENOMEM;
ab@2053: 		} else {
ab@2053: 			/* Free old allocation, new allocation was successful */
ab@2053: 			pci_free_consistent(pdev, txdr->size, olddesc, olddma);
ab@2053: 		}
ab@2053: 	}
ab@2053: 	memset(txdr->desc, 0, txdr->size);
ab@2053: 
ab@2053: 	txdr->next_to_use = 0;
ab@2053: 	txdr->next_to_clean = 0;
ab@2053: 
ab@2053: 	return 0;
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
ab@2053:  * 				  (Descriptors) for all queues
ab@2053:  * @adapter: board private structure
ab@2053:  *
ab@2053:  * Return 0 on success, negative on failure
ab@2053:  **/
ab@2053: 
ab@2053: int e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
ab@2053: {
ab@2053: 	int i, err = 0;
ab@2053: 
ab@2053: 	for (i = 0; i < adapter->num_tx_queues; i++) {
ab@2053: 		err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
ab@2053: 		if (err) {
ab@2053: 			DPRINTK(PROBE, ERR,
ab@2053: 				"Allocation for Tx Queue %u failed\n", i);
ab@2053: 			for (i-- ; i >= 0; i--)
ab@2053: 				e1000_free_tx_resources(adapter,
ab@2053: 							&adapter->tx_ring[i]);
ab@2053: 			break;
ab@2053: 		}
ab@2053: 	}
ab@2053: 
ab@2053: 	return err;
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
ab@2053:  * @adapter: board private structure
ab@2053:  *
ab@2053:  * Configure the Tx unit of the MAC after a reset.
ab@2053:  **/
ab@2053: 
ab@2053: static void e1000_configure_tx(struct e1000_adapter *adapter)
ab@2053: {
ab@2053: 	u64 tdba;
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	u32 tdlen, tctl, tipg;
ab@2053: 	u32 ipgr1, ipgr2;
ab@2053: 
ab@2053: 	/* Setup the HW Tx Head and Tail descriptor pointers */
ab@2053: 
ab@2053: 	switch (adapter->num_tx_queues) {
ab@2053: 	case 1:
ab@2053: 	default:
ab@2053: 		tdba = adapter->tx_ring[0].dma;
ab@2053: 		tdlen = adapter->tx_ring[0].count *
ab@2053: 			sizeof(struct e1000_tx_desc);
ab@2053: 		ew32(TDLEN, tdlen);
ab@2053: 		ew32(TDBAH, (tdba >> 32));
ab@2053: 		ew32(TDBAL, (tdba & 0x00000000ffffffffULL));
ab@2053: 		ew32(TDT, 0);
ab@2053: 		ew32(TDH, 0);
ab@2053: 		adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? E1000_TDH : E1000_82542_TDH);
ab@2053: 		adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? E1000_TDT : E1000_82542_TDT);
ab@2053: 		break;
ab@2053: 	}
ab@2053: 
ab@2053: 	/* Set the default values for the Tx Inter Packet Gap timer */
ab@2053: 	if ((hw->media_type == e1000_media_type_fiber ||
ab@2053: 	     hw->media_type == e1000_media_type_internal_serdes))
ab@2053: 		tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
ab@2053: 	else
ab@2053: 		tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
ab@2053: 
ab@2053: 	switch (hw->mac_type) {
ab@2053: 	case e1000_82542_rev2_0:
ab@2053: 	case e1000_82542_rev2_1:
ab@2053: 		tipg = DEFAULT_82542_TIPG_IPGT;
ab@2053: 		ipgr1 = DEFAULT_82542_TIPG_IPGR1;
ab@2053: 		ipgr2 = DEFAULT_82542_TIPG_IPGR2;
ab@2053: 		break;
ab@2053: 	default:
ab@2053: 		ipgr1 = DEFAULT_82543_TIPG_IPGR1;
ab@2053: 		ipgr2 = DEFAULT_82543_TIPG_IPGR2;
ab@2053: 		break;
ab@2053: 	}
ab@2053: 	tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
ab@2053: 	tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
ab@2053: 	ew32(TIPG, tipg);
ab@2053: 
ab@2053: 	/* Set the Tx Interrupt Delay register */
ab@2053: 
ab@2053: 	ew32(TIDV, adapter->tx_int_delay);
ab@2053: 	if (hw->mac_type >= e1000_82540)
ab@2053: 		ew32(TADV, adapter->tx_abs_int_delay);
ab@2053: 
ab@2053: 	/* Program the Transmit Control Register */
ab@2053: 
ab@2053: 	tctl = er32(TCTL);
ab@2053: 	tctl &= ~E1000_TCTL_CT;
ab@2053: 	tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
ab@2053: 		(E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
ab@2053: 
ab@2053: 	e1000_config_collision_dist(hw);
ab@2053: 
ab@2053: 	/* Setup Transmit Descriptor Settings for eop descriptor */
ab@2053: 	adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
ab@2053: 
ab@2053: 	/* only set IDE if we are delaying interrupts using the timers */
ab@2053: 	if (adapter->tx_int_delay)
ab@2053: 		adapter->txd_cmd |= E1000_TXD_CMD_IDE;
ab@2053: 
ab@2053: 	if (hw->mac_type < e1000_82543)
ab@2053: 		adapter->txd_cmd |= E1000_TXD_CMD_RPS;
ab@2053: 	else
ab@2053: 		adapter->txd_cmd |= E1000_TXD_CMD_RS;
ab@2053: 
ab@2053: 	/* Cache if we're 82544 running in PCI-X because we'll
ab@2053: 	 * need this to apply a workaround later in the send path. */
ab@2053: 	if (hw->mac_type == e1000_82544 &&
ab@2053: 	    hw->bus_type == e1000_bus_type_pcix)
ab@2053: 		adapter->pcix_82544 = 1;
ab@2053: 
ab@2053: 	ew32(TCTL, tctl);
ab@2053: 
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
ab@2053:  * @adapter: board private structure
ab@2053:  * @rxdr:    rx descriptor ring (for a specific queue) to setup
ab@2053:  *
ab@2053:  * Returns 0 on success, negative on failure
ab@2053:  **/
ab@2053: 
ab@2053: static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
ab@2053: 				    struct e1000_rx_ring *rxdr)
ab@2053: {
ab@2053: 	struct pci_dev *pdev = adapter->pdev;
ab@2053: 	int size, desc_len;
ab@2053: 
ab@2053: 	size = sizeof(struct e1000_buffer) * rxdr->count;
ab@2053: 	rxdr->buffer_info = vmalloc(size);
ab@2053: 	if (!rxdr->buffer_info) {
ab@2053: 		DPRINTK(PROBE, ERR,
ab@2053: 		"Unable to allocate memory for the receive descriptor ring\n");
ab@2053: 		return -ENOMEM;
ab@2053: 	}
ab@2053: 	memset(rxdr->buffer_info, 0, size);
ab@2053: 
ab@2053: 	desc_len = sizeof(struct e1000_rx_desc);
ab@2053: 
ab@2053: 	/* Round up to nearest 4K */
ab@2053: 
ab@2053: 	rxdr->size = rxdr->count * desc_len;
ab@2053: 	rxdr->size = ALIGN(rxdr->size, 4096);
ab@2053: 
ab@2053: 	rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
ab@2053: 
ab@2053: 	if (!rxdr->desc) {
ab@2053: 		DPRINTK(PROBE, ERR,
ab@2053: 		"Unable to allocate memory for the receive descriptor ring\n");
ab@2053: setup_rx_desc_die:
ab@2053: 		vfree(rxdr->buffer_info);
ab@2053: 		return -ENOMEM;
ab@2053: 	}
ab@2053: 
ab@2053: 	/* Fix for errata 23, can't cross 64kB boundary */
ab@2053: 	if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
ab@2053: 		void *olddesc = rxdr->desc;
ab@2053: 		dma_addr_t olddma = rxdr->dma;
ab@2053: 		DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
ab@2053: 				     "at %p\n", rxdr->size, rxdr->desc);
ab@2053: 		/* Try again, without freeing the previous */
ab@2053: 		rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
ab@2053: 		/* Failed allocation, critical failure */
ab@2053: 		if (!rxdr->desc) {
ab@2053: 			pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
ab@2053: 			DPRINTK(PROBE, ERR,
ab@2053: 				"Unable to allocate memory "
ab@2053: 				"for the receive descriptor ring\n");
ab@2053: 			goto setup_rx_desc_die;
ab@2053: 		}
ab@2053: 
ab@2053: 		if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
ab@2053: 			/* give up */
ab@2053: 			pci_free_consistent(pdev, rxdr->size, rxdr->desc,
ab@2053: 					    rxdr->dma);
ab@2053: 			pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
ab@2053: 			DPRINTK(PROBE, ERR,
ab@2053: 				"Unable to allocate aligned memory "
ab@2053: 				"for the receive descriptor ring\n");
ab@2053: 			goto setup_rx_desc_die;
ab@2053: 		} else {
ab@2053: 			/* Free old allocation, new allocation was successful */
ab@2053: 			pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
ab@2053: 		}
ab@2053: 	}
ab@2053: 	memset(rxdr->desc, 0, rxdr->size);
ab@2053: 
ab@2053: 	rxdr->next_to_clean = 0;
ab@2053: 	rxdr->next_to_use = 0;
ab@2053: 	rxdr->rx_skb_top = NULL;
ab@2053: 
ab@2053: 	return 0;
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
ab@2053:  * 				  (Descriptors) for all queues
ab@2053:  * @adapter: board private structure
ab@2053:  *
ab@2053:  * Return 0 on success, negative on failure
ab@2053:  **/
ab@2053: 
ab@2053: int e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
ab@2053: {
ab@2053: 	int i, err = 0;
ab@2053: 
ab@2053: 	for (i = 0; i < adapter->num_rx_queues; i++) {
ab@2053: 		err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
ab@2053: 		if (err) {
ab@2053: 			DPRINTK(PROBE, ERR,
ab@2053: 				"Allocation for Rx Queue %u failed\n", i);
ab@2053: 			for (i-- ; i >= 0; i--)
ab@2053: 				e1000_free_rx_resources(adapter,
ab@2053: 							&adapter->rx_ring[i]);
ab@2053: 			break;
ab@2053: 		}
ab@2053: 	}
ab@2053: 
ab@2053: 	return err;
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_setup_rctl - configure the receive control registers
ab@2053:  * @adapter: Board private structure
ab@2053:  **/
ab@2053: static void e1000_setup_rctl(struct e1000_adapter *adapter)
ab@2053: {
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	u32 rctl;
ab@2053: 
ab@2053: 	rctl = er32(RCTL);
ab@2053: 
ab@2053: 	rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
ab@2053: 
ab@2053: 	rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
ab@2053: 		E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
ab@2053: 		(hw->mc_filter_type << E1000_RCTL_MO_SHIFT);
ab@2053: 
ab@2053: 	if (hw->tbi_compatibility_on == 1)
ab@2053: 		rctl |= E1000_RCTL_SBP;
ab@2053: 	else
ab@2053: 		rctl &= ~E1000_RCTL_SBP;
ab@2053: 
ab@2053: 	if (adapter->netdev->mtu <= ETH_DATA_LEN)
ab@2053: 		rctl &= ~E1000_RCTL_LPE;
ab@2053: 	else
ab@2053: 		rctl |= E1000_RCTL_LPE;
ab@2053: 
ab@2053: 	/* Setup buffer sizes */
ab@2053: 	rctl &= ~E1000_RCTL_SZ_4096;
ab@2053: 	rctl |= E1000_RCTL_BSEX;
ab@2053: 	switch (adapter->rx_buffer_len) {
ab@2053: 		case E1000_RXBUFFER_2048:
ab@2053: 		default:
ab@2053: 			rctl |= E1000_RCTL_SZ_2048;
ab@2053: 			rctl &= ~E1000_RCTL_BSEX;
ab@2053: 			break;
ab@2053: 		case E1000_RXBUFFER_4096:
ab@2053: 			rctl |= E1000_RCTL_SZ_4096;
ab@2053: 			break;
ab@2053: 		case E1000_RXBUFFER_8192:
ab@2053: 			rctl |= E1000_RCTL_SZ_8192;
ab@2053: 			break;
ab@2053: 		case E1000_RXBUFFER_16384:
ab@2053: 			rctl |= E1000_RCTL_SZ_16384;
ab@2053: 			break;
ab@2053: 	}
ab@2053: 
ab@2053: 	ew32(RCTL, rctl);
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_configure_rx - Configure 8254x Receive Unit after Reset
ab@2053:  * @adapter: board private structure
ab@2053:  *
ab@2053:  * Configure the Rx unit of the MAC after a reset.
ab@2053:  **/
ab@2053: 
ab@2053: static void e1000_configure_rx(struct e1000_adapter *adapter)
ab@2053: {
ab@2053: 	u64 rdba;
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	u32 rdlen, rctl, rxcsum;
ab@2053: 
ab@2053: 	if (adapter->netdev->mtu > ETH_DATA_LEN) {
ab@2053: 		rdlen = adapter->rx_ring[0].count *
ab@2053: 		        sizeof(struct e1000_rx_desc);
ab@2053: 		adapter->clean_rx = e1000_clean_jumbo_rx_irq;
ab@2053: 		adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers;
ab@2053: 	} else {
ab@2053: 		rdlen = adapter->rx_ring[0].count *
ab@2053: 		        sizeof(struct e1000_rx_desc);
ab@2053: 		adapter->clean_rx = e1000_clean_rx_irq;
ab@2053: 		adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
ab@2053: 	}
ab@2053: 
ab@2053: 	/* disable receives while setting up the descriptors */
ab@2053: 	rctl = er32(RCTL);
ab@2053: 	ew32(RCTL, rctl & ~E1000_RCTL_EN);
ab@2053: 
ab@2053: 	/* set the Receive Delay Timer Register */
ab@2053: 	ew32(RDTR, adapter->rx_int_delay);
ab@2053: 
ab@2053: 	if (hw->mac_type >= e1000_82540) {
ab@2053: 		ew32(RADV, adapter->rx_abs_int_delay);
ab@2053: 		if (adapter->itr_setting != 0)
ab@2053: 			ew32(ITR, 1000000000 / (adapter->itr * 256));
ab@2053: 	}
ab@2053: 
ab@2053: 	/* Setup the HW Rx Head and Tail Descriptor Pointers and
ab@2053: 	 * the Base and Length of the Rx Descriptor Ring */
ab@2053: 	switch (adapter->num_rx_queues) {
ab@2053: 	case 1:
ab@2053: 	default:
ab@2053: 		rdba = adapter->rx_ring[0].dma;
ab@2053: 		ew32(RDLEN, rdlen);
ab@2053: 		ew32(RDBAH, (rdba >> 32));
ab@2053: 		ew32(RDBAL, (rdba & 0x00000000ffffffffULL));
ab@2053: 		ew32(RDT, 0);
ab@2053: 		ew32(RDH, 0);
ab@2053: 		adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? E1000_RDH : E1000_82542_RDH);
ab@2053: 		adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? E1000_RDT : E1000_82542_RDT);
ab@2053: 		break;
ab@2053: 	}
ab@2053: 
ab@2053: 	/* Enable 82543 Receive Checksum Offload for TCP and UDP */
ab@2053: 	if (hw->mac_type >= e1000_82543) {
ab@2053: 		rxcsum = er32(RXCSUM);
ab@2053: 		if (adapter->rx_csum)
ab@2053: 			rxcsum |= E1000_RXCSUM_TUOFL;
ab@2053: 		else
ab@2053: 			/* don't need to clear IPPCSE as it defaults to 0 */
ab@2053: 			rxcsum &= ~E1000_RXCSUM_TUOFL;
ab@2053: 		ew32(RXCSUM, rxcsum);
ab@2053: 	}
ab@2053: 
ab@2053: 	/* Enable Receives */
ab@2053: 	ew32(RCTL, rctl);
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_free_tx_resources - Free Tx Resources per Queue
ab@2053:  * @adapter: board private structure
ab@2053:  * @tx_ring: Tx descriptor ring for a specific queue
ab@2053:  *
ab@2053:  * Free all transmit software resources
ab@2053:  **/
ab@2053: 
ab@2053: static void e1000_free_tx_resources(struct e1000_adapter *adapter,
ab@2053: 				    struct e1000_tx_ring *tx_ring)
ab@2053: {
ab@2053: 	struct pci_dev *pdev = adapter->pdev;
ab@2053: 
ab@2053: 	e1000_clean_tx_ring(adapter, tx_ring);
ab@2053: 
ab@2053: 	vfree(tx_ring->buffer_info);
ab@2053: 	tx_ring->buffer_info = NULL;
ab@2053: 
ab@2053: 	pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
ab@2053: 
ab@2053: 	tx_ring->desc = NULL;
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_free_all_tx_resources - Free Tx Resources for All Queues
ab@2053:  * @adapter: board private structure
ab@2053:  *
ab@2053:  * Free all transmit software resources
ab@2053:  **/
ab@2053: 
ab@2053: void e1000_free_all_tx_resources(struct e1000_adapter *adapter)
ab@2053: {
ab@2053: 	int i;
ab@2053: 
ab@2053: 	for (i = 0; i < adapter->num_tx_queues; i++)
ab@2053: 		e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
ab@2053: }
ab@2053: 
ab@2053: static void e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
ab@2053: 					     struct e1000_buffer *buffer_info)
ab@2053: {
ab@2053: 	if (adapter->ecdev)
ab@2053: 		return;
ab@2053: 
ab@2053: 	if (buffer_info->dma) {
ab@2053: 		if (buffer_info->mapped_as_page)
ab@2053: 			pci_unmap_page(adapter->pdev, buffer_info->dma,
ab@2053: 				       buffer_info->length, PCI_DMA_TODEVICE);
ab@2053: 		else
ab@2053: 			pci_unmap_single(adapter->pdev,	buffer_info->dma,
ab@2053: 					 buffer_info->length,
ab@2053: 					 PCI_DMA_TODEVICE);
ab@2053: 		buffer_info->dma = 0;
ab@2053: 	}
ab@2053: 	if (buffer_info->skb) {
ab@2053: 		dev_kfree_skb_any(buffer_info->skb);
ab@2053: 		buffer_info->skb = NULL;
ab@2053: 	}
ab@2053: 	buffer_info->time_stamp = 0;
ab@2053: 	/* buffer_info must be completely set up in the transmit path */
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_clean_tx_ring - Free Tx Buffers
ab@2053:  * @adapter: board private structure
ab@2053:  * @tx_ring: ring to be cleaned
ab@2053:  **/
ab@2053: 
ab@2053: static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
ab@2053: 				struct e1000_tx_ring *tx_ring)
ab@2053: {
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	struct e1000_buffer *buffer_info;
ab@2053: 	unsigned long size;
ab@2053: 	unsigned int i;
ab@2053: 
ab@2053: 	/* Free all the Tx ring sk_buffs */
ab@2053: 
ab@2053: 	for (i = 0; i < tx_ring->count; i++) {
ab@2053: 		buffer_info = &tx_ring->buffer_info[i];
ab@2053: 		e1000_unmap_and_free_tx_resource(adapter, buffer_info);
ab@2053: 	}
ab@2053: 
ab@2053: 	size = sizeof(struct e1000_buffer) * tx_ring->count;
ab@2053: 	memset(tx_ring->buffer_info, 0, size);
ab@2053: 
ab@2053: 	/* Zero out the descriptor ring */
ab@2053: 
ab@2053: 	memset(tx_ring->desc, 0, tx_ring->size);
ab@2053: 
ab@2053: 	tx_ring->next_to_use = 0;
ab@2053: 	tx_ring->next_to_clean = 0;
ab@2053: 	tx_ring->last_tx_tso = 0;
ab@2053: 
ab@2053: 	writel(0, hw->hw_addr + tx_ring->tdh);
ab@2053: 	writel(0, hw->hw_addr + tx_ring->tdt);
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
ab@2053:  * @adapter: board private structure
ab@2053:  **/
ab@2053: 
ab@2053: static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
ab@2053: {
ab@2053: 	int i;
ab@2053: 
ab@2053: 	for (i = 0; i < adapter->num_tx_queues; i++)
ab@2053: 		e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_free_rx_resources - Free Rx Resources
ab@2053:  * @adapter: board private structure
ab@2053:  * @rx_ring: ring to clean the resources from
ab@2053:  *
ab@2053:  * Free all receive software resources
ab@2053:  **/
ab@2053: 
ab@2053: static void e1000_free_rx_resources(struct e1000_adapter *adapter,
ab@2053: 				    struct e1000_rx_ring *rx_ring)
ab@2053: {
ab@2053: 	struct pci_dev *pdev = adapter->pdev;
ab@2053: 
ab@2053: 	e1000_clean_rx_ring(adapter, rx_ring);
ab@2053: 
ab@2053: 	vfree(rx_ring->buffer_info);
ab@2053: 	rx_ring->buffer_info = NULL;
ab@2053: 
ab@2053: 	pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
ab@2053: 
ab@2053: 	rx_ring->desc = NULL;
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_free_all_rx_resources - Free Rx Resources for All Queues
ab@2053:  * @adapter: board private structure
ab@2053:  *
ab@2053:  * Free all receive software resources
ab@2053:  **/
ab@2053: 
ab@2053: void e1000_free_all_rx_resources(struct e1000_adapter *adapter)
ab@2053: {
ab@2053: 	int i;
ab@2053: 
ab@2053: 	for (i = 0; i < adapter->num_rx_queues; i++)
ab@2053: 		e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_clean_rx_ring - Free Rx Buffers per Queue
ab@2053:  * @adapter: board private structure
ab@2053:  * @rx_ring: ring to free buffers from
ab@2053:  **/
ab@2053: 
ab@2053: static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
ab@2053: 				struct e1000_rx_ring *rx_ring)
ab@2053: {
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	struct e1000_buffer *buffer_info;
ab@2053: 	struct pci_dev *pdev = adapter->pdev;
ab@2053: 	unsigned long size;
ab@2053: 	unsigned int i;
ab@2053: 
ab@2053: 	/* Free all the Rx ring sk_buffs */
ab@2053: 	for (i = 0; i < rx_ring->count; i++) {
ab@2053: 		buffer_info = &rx_ring->buffer_info[i];
ab@2053: 		if (buffer_info->dma &&
ab@2053: 		    adapter->clean_rx == e1000_clean_rx_irq) {
ab@2053: 			pci_unmap_single(pdev, buffer_info->dma,
ab@2053: 			                 buffer_info->length,
ab@2053: 			                 PCI_DMA_FROMDEVICE);
ab@2053: 		} else if (buffer_info->dma &&
ab@2053: 		           adapter->clean_rx == e1000_clean_jumbo_rx_irq) {
ab@2053: 			pci_unmap_page(pdev, buffer_info->dma,
ab@2053: 			               buffer_info->length,
ab@2053: 			               PCI_DMA_FROMDEVICE);
ab@2053: 		}
ab@2053: 
ab@2053: 		buffer_info->dma = 0;
ab@2053: 		if (buffer_info->page) {
ab@2053: 			put_page(buffer_info->page);
ab@2053: 			buffer_info->page = NULL;
ab@2053: 		}
ab@2053: 		if (buffer_info->skb) {
ab@2053: 			dev_kfree_skb(buffer_info->skb);
ab@2053: 			buffer_info->skb = NULL;
ab@2053: 		}
ab@2053: 	}
ab@2053: 
ab@2053: 	/* there also may be some cached data from a chained receive */
ab@2053: 	if (rx_ring->rx_skb_top) {
ab@2053: 		dev_kfree_skb(rx_ring->rx_skb_top);
ab@2053: 		rx_ring->rx_skb_top = NULL;
ab@2053: 	}
ab@2053: 
ab@2053: 	size = sizeof(struct e1000_buffer) * rx_ring->count;
ab@2053: 	memset(rx_ring->buffer_info, 0, size);
ab@2053: 
ab@2053: 	/* Zero out the descriptor ring */
ab@2053: 	memset(rx_ring->desc, 0, rx_ring->size);
ab@2053: 
ab@2053: 	rx_ring->next_to_clean = 0;
ab@2053: 	rx_ring->next_to_use = 0;
ab@2053: 
ab@2053: 	writel(0, hw->hw_addr + rx_ring->rdh);
ab@2053: 	writel(0, hw->hw_addr + rx_ring->rdt);
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
ab@2053:  * @adapter: board private structure
ab@2053:  **/
ab@2053: 
ab@2053: static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
ab@2053: {
ab@2053: 	int i;
ab@2053: 
ab@2053: 	for (i = 0; i < adapter->num_rx_queues; i++)
ab@2053: 		e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
ab@2053: }
ab@2053: 
ab@2053: /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
ab@2053:  * and memory write and invalidate disabled for certain operations
ab@2053:  */
ab@2053: static void e1000_enter_82542_rst(struct e1000_adapter *adapter)
ab@2053: {
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	struct net_device *netdev = adapter->netdev;
ab@2053: 	u32 rctl;
ab@2053: 
ab@2053: 	e1000_pci_clear_mwi(hw);
ab@2053: 
ab@2053: 	rctl = er32(RCTL);
ab@2053: 	rctl |= E1000_RCTL_RST;
ab@2053: 	ew32(RCTL, rctl);
ab@2053: 	E1000_WRITE_FLUSH();
ab@2053: 	mdelay(5);
ab@2053: 
ab@2053: 	if (!adapter->ecdev && netif_running(netdev))
ab@2053: 		e1000_clean_all_rx_rings(adapter);
ab@2053: }
ab@2053: 
ab@2053: static void e1000_leave_82542_rst(struct e1000_adapter *adapter)
ab@2053: {
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	struct net_device *netdev = adapter->netdev;
ab@2053: 	u32 rctl;
ab@2053: 
ab@2053: 	rctl = er32(RCTL);
ab@2053: 	rctl &= ~E1000_RCTL_RST;
ab@2053: 	ew32(RCTL, rctl);
ab@2053: 	E1000_WRITE_FLUSH();
ab@2053: 	mdelay(5);
ab@2053: 
ab@2053: 	if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE)
ab@2053: 		e1000_pci_set_mwi(hw);
ab@2053: 
ab@2053: 	if (!adapter->netdev && netif_running(netdev)) {
ab@2053: 		/* No need to loop, because 82542 supports only 1 queue */
ab@2053: 		struct e1000_rx_ring *ring = &adapter->rx_ring[0];
ab@2053: 		e1000_configure_rx(adapter);
ab@2053: 		if (adapter->ecdev) { 
ab@2053: 			/* fill rx ring completely! */
ab@2053: 			adapter->alloc_rx_buf(adapter, ring, ring->count);
ab@2053: 		} else {
ab@2053:             /* this one leaves the last ring element unallocated! */
ab@2053: 			adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
ab@2053: 		}
ab@2053: 
ab@2053: 	}
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_set_mac - Change the Ethernet Address of the NIC
ab@2053:  * @netdev: network interface device structure
ab@2053:  * @p: pointer to an address structure
ab@2053:  *
ab@2053:  * Returns 0 on success, negative on failure
ab@2053:  **/
ab@2053: 
ab@2053: static int e1000_set_mac(struct net_device *netdev, void *p)
ab@2053: {
ab@2053: 	struct e1000_adapter *adapter = netdev_priv(netdev);
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	struct sockaddr *addr = p;
ab@2053: 
ab@2053: 	if (!is_valid_ether_addr(addr->sa_data))
ab@2053: 		return -EADDRNOTAVAIL;
ab@2053: 
ab@2053: 	/* 82542 2.0 needs to be in reset to write receive address registers */
ab@2053: 
ab@2053: 	if (hw->mac_type == e1000_82542_rev2_0)
ab@2053: 		e1000_enter_82542_rst(adapter);
ab@2053: 
ab@2053: 	memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
ab@2053: 	memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len);
ab@2053: 
ab@2053: 	e1000_rar_set(hw, hw->mac_addr, 0);
ab@2053: 
ab@2053: 	if (hw->mac_type == e1000_82542_rev2_0)
ab@2053: 		e1000_leave_82542_rst(adapter);
ab@2053: 
ab@2053: 	return 0;
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
ab@2053:  * @netdev: network interface device structure
ab@2053:  *
ab@2053:  * The set_rx_mode entry point is called whenever the unicast or multicast
ab@2053:  * address lists or the network interface flags are updated. This routine is
ab@2053:  * responsible for configuring the hardware for proper unicast, multicast,
ab@2053:  * promiscuous mode, and all-multi behavior.
ab@2053:  **/
ab@2053: 
ab@2053: static void e1000_set_rx_mode(struct net_device *netdev)
ab@2053: {
ab@2053: 	struct e1000_adapter *adapter = netdev_priv(netdev);
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	struct netdev_hw_addr *ha;
ab@2053: 	bool use_uc = false;
ab@2053: 	struct dev_addr_list *mc_ptr;
ab@2053: 	u32 rctl;
ab@2053: 	u32 hash_value;
ab@2053: 	int i, rar_entries = E1000_RAR_ENTRIES;
ab@2053: 	int mta_reg_count = E1000_NUM_MTA_REGISTERS;
ab@2053: 	u32 *mcarray = kcalloc(mta_reg_count, sizeof(u32), GFP_ATOMIC);
ab@2053: 
ab@2053: 	if (!mcarray) {
ab@2053: 		DPRINTK(PROBE, ERR, "memory allocation failed\n");
ab@2053: 		return;
ab@2053: 	}
ab@2053: 
ab@2053: 	/* Check for Promiscuous and All Multicast modes */
ab@2053: 
ab@2053: 	rctl = er32(RCTL);
ab@2053: 
ab@2053: 	if (netdev->flags & IFF_PROMISC) {
ab@2053: 		rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
ab@2053: 		rctl &= ~E1000_RCTL_VFE;
ab@2053: 	} else {
ab@2053: 		if (netdev->flags & IFF_ALLMULTI)
ab@2053: 			rctl |= E1000_RCTL_MPE;
ab@2053: 		else
ab@2053: 			rctl &= ~E1000_RCTL_MPE;
ab@2053: 		/* Enable VLAN filter if there is a VLAN */
ab@2053: 		if (adapter->vlgrp)
ab@2053: 			rctl |= E1000_RCTL_VFE;
ab@2053: 	}
ab@2053: 
ab@2053: 	if (netdev->uc.count > rar_entries - 1) {
ab@2053: 		rctl |= E1000_RCTL_UPE;
ab@2053: 	} else if (!(netdev->flags & IFF_PROMISC)) {
ab@2053: 		rctl &= ~E1000_RCTL_UPE;
ab@2053: 		use_uc = true;
ab@2053: 	}
ab@2053: 
ab@2053: 	ew32(RCTL, rctl);
ab@2053: 
ab@2053: 	/* 82542 2.0 needs to be in reset to write receive address registers */
ab@2053: 
ab@2053: 	if (hw->mac_type == e1000_82542_rev2_0)
ab@2053: 		e1000_enter_82542_rst(adapter);
ab@2053: 
ab@2053: 	/* load the first 14 addresses into the exact filters 1-14. Unicast
ab@2053: 	 * addresses take precedence to avoid disabling unicast filtering
ab@2053: 	 * when possible.
ab@2053: 	 *
ab@2053: 	 * RAR 0 is used for the station MAC adddress
ab@2053: 	 * if there are not 14 addresses, go ahead and clear the filters
ab@2053: 	 */
ab@2053: 	i = 1;
ab@2053: 	if (use_uc)
ab@2053: 		list_for_each_entry(ha, &netdev->uc.list, list) {
ab@2053: 			if (i == rar_entries)
ab@2053: 				break;
ab@2053: 			e1000_rar_set(hw, ha->addr, i++);
ab@2053: 		}
ab@2053: 
ab@2053: 	WARN_ON(i == rar_entries);
ab@2053: 
ab@2053: 	mc_ptr = netdev->mc_list;
ab@2053: 
ab@2053: 	for (; i < rar_entries; i++) {
ab@2053: 		if (mc_ptr) {
ab@2053: 			e1000_rar_set(hw, mc_ptr->da_addr, i);
ab@2053: 			mc_ptr = mc_ptr->next;
ab@2053: 		} else {
ab@2053: 			E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
ab@2053: 			E1000_WRITE_FLUSH();
ab@2053: 			E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
ab@2053: 			E1000_WRITE_FLUSH();
ab@2053: 		}
ab@2053: 	}
ab@2053: 
ab@2053: 	/* load any remaining addresses into the hash table */
ab@2053: 
ab@2053: 	for (; mc_ptr; mc_ptr = mc_ptr->next) {
ab@2053: 		u32 hash_reg, hash_bit, mta;
ab@2053: 		hash_value = e1000_hash_mc_addr(hw, mc_ptr->da_addr);
ab@2053: 		hash_reg = (hash_value >> 5) & 0x7F;
ab@2053: 		hash_bit = hash_value & 0x1F;
ab@2053: 		mta = (1 << hash_bit);
ab@2053: 		mcarray[hash_reg] |= mta;
ab@2053: 	}
ab@2053: 
ab@2053: 	/* write the hash table completely, write from bottom to avoid
ab@2053: 	 * both stupid write combining chipsets, and flushing each write */
ab@2053: 	for (i = mta_reg_count - 1; i >= 0 ; i--) {
ab@2053: 		/*
ab@2053: 		 * If we are on an 82544 has an errata where writing odd
ab@2053: 		 * offsets overwrites the previous even offset, but writing
ab@2053: 		 * backwards over the range solves the issue by always
ab@2053: 		 * writing the odd offset first
ab@2053: 		 */
ab@2053: 		E1000_WRITE_REG_ARRAY(hw, MTA, i, mcarray[i]);
ab@2053: 	}
ab@2053: 	E1000_WRITE_FLUSH();
ab@2053: 
ab@2053: 	if (hw->mac_type == e1000_82542_rev2_0)
ab@2053: 		e1000_leave_82542_rst(adapter);
ab@2053: 
ab@2053: 	kfree(mcarray);
ab@2053: }
ab@2053: 
ab@2053: /* Need to wait a few seconds after link up to get diagnostic information from
ab@2053:  * the phy */
ab@2053: 
ab@2053: static void e1000_update_phy_info(unsigned long data)
ab@2053: {
ab@2053: 	struct e1000_adapter *adapter = (struct e1000_adapter *)data;
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	e1000_phy_get_info(hw, &adapter->phy_info);
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_82547_tx_fifo_stall - Timer Call-back
ab@2053:  * @data: pointer to adapter cast into an unsigned long
ab@2053:  **/
ab@2053: 
ab@2053: static void e1000_82547_tx_fifo_stall(unsigned long data)
ab@2053: {
ab@2053: 	struct e1000_adapter *adapter = (struct e1000_adapter *)data;
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	struct net_device *netdev = adapter->netdev;
ab@2053: 	u32 tctl;
ab@2053: 
ab@2053: 	if (atomic_read(&adapter->tx_fifo_stall)) {
ab@2053: 		if ((er32(TDT) == er32(TDH)) &&
ab@2053: 		   (er32(TDFT) == er32(TDFH)) &&
ab@2053: 		   (er32(TDFTS) == er32(TDFHS))) {
ab@2053: 			tctl = er32(TCTL);
ab@2053: 			ew32(TCTL, tctl & ~E1000_TCTL_EN);
ab@2053: 			ew32(TDFT, adapter->tx_head_addr);
ab@2053: 			ew32(TDFH, adapter->tx_head_addr);
ab@2053: 			ew32(TDFTS, adapter->tx_head_addr);
ab@2053: 			ew32(TDFHS, adapter->tx_head_addr);
ab@2053: 			ew32(TCTL, tctl);
ab@2053: 			E1000_WRITE_FLUSH();
ab@2053: 
ab@2053: 			adapter->tx_fifo_head = 0;
ab@2053: 			atomic_set(&adapter->tx_fifo_stall, 0);
ab@2053: 			if (!adapter->ecdev) netif_wake_queue(netdev);
ab@2053: 		} else if (!test_bit(__E1000_DOWN, &adapter->flags)) {
ab@2053: 			if (!adapter->ecdev) 
ab@2053: 				mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
ab@2053: 		}
ab@2053: 	}
ab@2053: }
ab@2053: 
ab@2053: static bool e1000_has_link(struct e1000_adapter *adapter)
ab@2053: {
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	bool link_active = false;
ab@2053: 
ab@2053: 	/* get_link_status is set on LSC (link status) interrupt or
ab@2053: 	 * rx sequence error interrupt.  get_link_status will stay
ab@2053: 	 * false until the e1000_check_for_link establishes link
ab@2053: 	 * for copper adapters ONLY
ab@2053: 	 */
ab@2053: 	switch (hw->media_type) {
ab@2053: 	case e1000_media_type_copper:
ab@2053: 		if (hw->get_link_status) {
ab@2053: 			e1000_check_for_link(hw);
ab@2053: 			link_active = !hw->get_link_status;
ab@2053: 		} else {
ab@2053: 			link_active = true;
ab@2053: 		}
ab@2053: 		break;
ab@2053: 	case e1000_media_type_fiber:
ab@2053: 		e1000_check_for_link(hw);
ab@2053: 		link_active = !!(er32(STATUS) & E1000_STATUS_LU);
ab@2053: 		break;
ab@2053: 	case e1000_media_type_internal_serdes:
ab@2053: 		e1000_check_for_link(hw);
ab@2053: 		link_active = hw->serdes_has_link;
ab@2053: 		break;
ab@2053: 	default:
ab@2053: 		break;
ab@2053: 	}
ab@2053: 
ab@2053: 	return link_active;
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_watchdog - Timer Call-back
ab@2053:  * @data: pointer to adapter cast into an unsigned long
ab@2053:  **/
ab@2053: static void e1000_watchdog(unsigned long data)
ab@2053: {
ab@2053: 	struct e1000_adapter *adapter = (struct e1000_adapter *)data;
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	struct net_device *netdev = adapter->netdev;
ab@2053: 	struct e1000_tx_ring *txdr = adapter->tx_ring;
ab@2053: 	u32 link, tctl;
ab@2053: 
ab@2053: 	link = e1000_has_link(adapter);
ab@2053: 	if (!adapter->ecdev && (netif_carrier_ok(netdev)) && link)
ab@2053: 		goto link_up;
ab@2053: 
ab@2053: 	if (link) {
ab@2053: 		if ((adapter->ecdev && !ecdev_get_link(adapter->ecdev))
ab@2053: 				|| (!adapter->ecdev && !netif_carrier_ok(netdev))) {
ab@2053: 			u32 ctrl;
ab@2053: 			bool txb2b = true;
ab@2053: 			/* update snapshot of PHY registers on LSC */
ab@2053: 			e1000_get_speed_and_duplex(hw,
ab@2053: 			                           &adapter->link_speed,
ab@2053: 			                           &adapter->link_duplex);
ab@2053: 
ab@2053: 			ctrl = er32(CTRL);
ab@2053: 			printk(KERN_INFO "e1000: %s NIC Link is Up %d Mbps %s, "
ab@2053: 			       "Flow Control: %s\n",
ab@2053: 			       netdev->name,
ab@2053: 			       adapter->link_speed,
ab@2053: 			       adapter->link_duplex == FULL_DUPLEX ?
ab@2053: 			        "Full Duplex" : "Half Duplex",
ab@2053: 			        ((ctrl & E1000_CTRL_TFCE) && (ctrl &
ab@2053: 			        E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
ab@2053: 			        E1000_CTRL_RFCE) ? "RX" : ((ctrl &
ab@2053: 			        E1000_CTRL_TFCE) ? "TX" : "None" )));
ab@2053: 
ab@2053: 			/* tweak tx_queue_len according to speed/duplex
ab@2053: 			 * and adjust the timeout factor */
ab@2053: 			netdev->tx_queue_len = adapter->tx_queue_len;
ab@2053: 			adapter->tx_timeout_factor = 1;
ab@2053: 			switch (adapter->link_speed) {
ab@2053: 			case SPEED_10:
ab@2053: 				txb2b = false;
ab@2053: 				netdev->tx_queue_len = 10;
ab@2053: 				adapter->tx_timeout_factor = 16;
ab@2053: 				break;
ab@2053: 			case SPEED_100:
ab@2053: 				txb2b = false;
ab@2053: 				netdev->tx_queue_len = 100;
ab@2053: 				/* maybe add some timeout factor ? */
ab@2053: 				break;
ab@2053: 			}
ab@2053: 
ab@2053: 			/* enable transmits in the hardware */
ab@2053: 			tctl = er32(TCTL);
ab@2053: 			tctl |= E1000_TCTL_EN;
ab@2053: 			ew32(TCTL, tctl);
ab@2053: 
ab@2053: 			if (adapter->ecdev) {
ab@2053: 				ecdev_set_link(adapter->ecdev, 1);
ab@2053: 			} else {
ab@2053: 				netif_carrier_on(netdev);
ab@2053: 				if (!test_bit(__E1000_DOWN, &adapter->flags))
ab@2053: 					mod_timer(&adapter->phy_info_timer,
ab@2053: 					          round_jiffies(jiffies + 2 * HZ));
ab@2053: 			}
ab@2053: 			adapter->smartspeed = 0;
ab@2053: 		}
ab@2053: 	} else {
ab@2053: 		if ((adapter->ecdev && ecdev_get_link(adapter->ecdev))
ab@2053: 				|| (!adapter->ecdev && netif_carrier_ok(netdev))) {
ab@2053: 			adapter->link_speed = 0;
ab@2053: 			adapter->link_duplex = 0;
ab@2053: 			printk(KERN_INFO "e1000: %s NIC Link is Down\n",
ab@2053: 			       netdev->name);
ab@2053: 			if (adapter->ecdev) {
ab@2053: 				ecdev_set_link(adapter->ecdev, 0);
ab@2053: 			} else {
ab@2053: 				netif_carrier_off(netdev);
ab@2053: 
ab@2053: 				if (!test_bit(__E1000_DOWN, &adapter->flags))
ab@2053: 					mod_timer(&adapter->phy_info_timer,
ab@2053: 					          round_jiffies(jiffies + 2 * HZ));
ab@2053: 			}
ab@2053: 		}
ab@2053: 
ab@2053: 		e1000_smartspeed(adapter);
ab@2053: 	}
ab@2053: 
ab@2053: link_up:
ab@2053: 	e1000_update_stats(adapter);
ab@2053: 
ab@2053: 	hw->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
ab@2053: 	adapter->tpt_old = adapter->stats.tpt;
ab@2053: 	hw->collision_delta = adapter->stats.colc - adapter->colc_old;
ab@2053: 	adapter->colc_old = adapter->stats.colc;
ab@2053: 
ab@2053: 	adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
ab@2053: 	adapter->gorcl_old = adapter->stats.gorcl;
ab@2053: 	adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
ab@2053: 	adapter->gotcl_old = adapter->stats.gotcl;
ab@2053: 
ab@2053: 	e1000_update_adaptive(hw);
ab@2053: 
ab@2053: 	if (!adapter->ecdev && !netif_carrier_ok(netdev)) {
ab@2053: 		if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
ab@2053: 			/* We've lost link, so the controller stops DMA,
ab@2053: 			 * but we've got queued Tx work that's never going
ab@2053: 			 * to get done, so reset controller to flush Tx.
ab@2053: 			 * (Do the reset outside of interrupt context). */
ab@2053: 			adapter->tx_timeout_count++;
ab@2053: 			schedule_work(&adapter->reset_task);
ab@2053: 			/* return immediately since reset is imminent */
ab@2053: 			return;
ab@2053: 		}
ab@2053: 	}
ab@2053: 
ab@2053: 	/* Cause software interrupt to ensure rx ring is cleaned */
ab@2053: 	ew32(ICS, E1000_ICS_RXDMT0);
ab@2053: 
ab@2053: 	/* Force detection of hung controller every watchdog period */
ab@2053: 	if (!adapter->ecdev) adapter->detect_tx_hung = true;
ab@2053: 
ab@2053: 	/* Reset the timer */
ab@2053: 	if (!adapter->ecdev) {
ab@2053: 		if (!test_bit(__E1000_DOWN, &adapter->flags))
ab@2053: 			mod_timer(&adapter->watchdog_timer,
ab@2053: 			          round_jiffies(jiffies + 2 * HZ));
ab@2053: 	}
ab@2053: }
ab@2053: 
ab@2053: enum latency_range {
ab@2053: 	lowest_latency = 0,
ab@2053: 	low_latency = 1,
ab@2053: 	bulk_latency = 2,
ab@2053: 	latency_invalid = 255
ab@2053: };
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_update_itr - update the dynamic ITR value based on statistics
ab@2053:  * @adapter: pointer to adapter
ab@2053:  * @itr_setting: current adapter->itr
ab@2053:  * @packets: the number of packets during this measurement interval
ab@2053:  * @bytes: the number of bytes during this measurement interval
ab@2053:  *
ab@2053:  *      Stores a new ITR value based on packets and byte
ab@2053:  *      counts during the last interrupt.  The advantage of per interrupt
ab@2053:  *      computation is faster updates and more accurate ITR for the current
ab@2053:  *      traffic pattern.  Constants in this function were computed
ab@2053:  *      based on theoretical maximum wire speed and thresholds were set based
ab@2053:  *      on testing data as well as attempting to minimize response time
ab@2053:  *      while increasing bulk throughput.
ab@2053:  *      this functionality is controlled by the InterruptThrottleRate module
ab@2053:  *      parameter (see e1000_param.c)
ab@2053:  **/
ab@2053: static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
ab@2053: 				     u16 itr_setting, int packets, int bytes)
ab@2053: {
ab@2053: 	unsigned int retval = itr_setting;
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 
ab@2053: 	if (unlikely(hw->mac_type < e1000_82540))
ab@2053: 		goto update_itr_done;
ab@2053: 
ab@2053: 	if (packets == 0)
ab@2053: 		goto update_itr_done;
ab@2053: 
ab@2053: 	switch (itr_setting) {
ab@2053: 	case lowest_latency:
ab@2053: 		/* jumbo frames get bulk treatment*/
ab@2053: 		if (bytes/packets > 8000)
ab@2053: 			retval = bulk_latency;
ab@2053: 		else if ((packets < 5) && (bytes > 512))
ab@2053: 			retval = low_latency;
ab@2053: 		break;
ab@2053: 	case low_latency:  /* 50 usec aka 20000 ints/s */
ab@2053: 		if (bytes > 10000) {
ab@2053: 			/* jumbo frames need bulk latency setting */
ab@2053: 			if (bytes/packets > 8000)
ab@2053: 				retval = bulk_latency;
ab@2053: 			else if ((packets < 10) || ((bytes/packets) > 1200))
ab@2053: 				retval = bulk_latency;
ab@2053: 			else if ((packets > 35))
ab@2053: 				retval = lowest_latency;
ab@2053: 		} else if (bytes/packets > 2000)
ab@2053: 			retval = bulk_latency;
ab@2053: 		else if (packets <= 2 && bytes < 512)
ab@2053: 			retval = lowest_latency;
ab@2053: 		break;
ab@2053: 	case bulk_latency: /* 250 usec aka 4000 ints/s */
ab@2053: 		if (bytes > 25000) {
ab@2053: 			if (packets > 35)
ab@2053: 				retval = low_latency;
ab@2053: 		} else if (bytes < 6000) {
ab@2053: 			retval = low_latency;
ab@2053: 		}
ab@2053: 		break;
ab@2053: 	}
ab@2053: 
ab@2053: update_itr_done:
ab@2053: 	return retval;
ab@2053: }
ab@2053: 
ab@2053: static void e1000_set_itr(struct e1000_adapter *adapter)
ab@2053: {
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	u16 current_itr;
ab@2053: 	u32 new_itr = adapter->itr;
ab@2053: 
ab@2053: 	if (unlikely(hw->mac_type < e1000_82540))
ab@2053: 		return;
ab@2053: 
ab@2053: 	/* for non-gigabit speeds, just fix the interrupt rate at 4000 */
ab@2053: 	if (unlikely(adapter->link_speed != SPEED_1000)) {
ab@2053: 		current_itr = 0;
ab@2053: 		new_itr = 4000;
ab@2053: 		goto set_itr_now;
ab@2053: 	}
ab@2053: 
ab@2053: 	adapter->tx_itr = e1000_update_itr(adapter,
ab@2053: 	                            adapter->tx_itr,
ab@2053: 	                            adapter->total_tx_packets,
ab@2053: 	                            adapter->total_tx_bytes);
ab@2053: 	/* conservative mode (itr 3) eliminates the lowest_latency setting */
ab@2053: 	if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
ab@2053: 		adapter->tx_itr = low_latency;
ab@2053: 
ab@2053: 	adapter->rx_itr = e1000_update_itr(adapter,
ab@2053: 	                            adapter->rx_itr,
ab@2053: 	                            adapter->total_rx_packets,
ab@2053: 	                            adapter->total_rx_bytes);
ab@2053: 	/* conservative mode (itr 3) eliminates the lowest_latency setting */
ab@2053: 	if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
ab@2053: 		adapter->rx_itr = low_latency;
ab@2053: 
ab@2053: 	current_itr = max(adapter->rx_itr, adapter->tx_itr);
ab@2053: 
ab@2053: 	switch (current_itr) {
ab@2053: 	/* counts and packets in update_itr are dependent on these numbers */
ab@2053: 	case lowest_latency:
ab@2053: 		new_itr = 70000;
ab@2053: 		break;
ab@2053: 	case low_latency:
ab@2053: 		new_itr = 20000; /* aka hwitr = ~200 */
ab@2053: 		break;
ab@2053: 	case bulk_latency:
ab@2053: 		new_itr = 4000;
ab@2053: 		break;
ab@2053: 	default:
ab@2053: 		break;
ab@2053: 	}
ab@2053: 
ab@2053: set_itr_now:
ab@2053: 	if (new_itr != adapter->itr) {
ab@2053: 		/* this attempts to bias the interrupt rate towards Bulk
ab@2053: 		 * by adding intermediate steps when interrupt rate is
ab@2053: 		 * increasing */
ab@2053: 		new_itr = new_itr > adapter->itr ?
ab@2053: 		             min(adapter->itr + (new_itr >> 2), new_itr) :
ab@2053: 		             new_itr;
ab@2053: 		adapter->itr = new_itr;
ab@2053: 		ew32(ITR, 1000000000 / (new_itr * 256));
ab@2053: 	}
ab@2053: 
ab@2053: 	return;
ab@2053: }
ab@2053: 
ab@2053: #define E1000_TX_FLAGS_CSUM		0x00000001
ab@2053: #define E1000_TX_FLAGS_VLAN		0x00000002
ab@2053: #define E1000_TX_FLAGS_TSO		0x00000004
ab@2053: #define E1000_TX_FLAGS_IPV4		0x00000008
ab@2053: #define E1000_TX_FLAGS_VLAN_MASK	0xffff0000
ab@2053: #define E1000_TX_FLAGS_VLAN_SHIFT	16
ab@2053: 
ab@2053: static int e1000_tso(struct e1000_adapter *adapter,
ab@2053: 		     struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
ab@2053: {
ab@2053: 	struct e1000_context_desc *context_desc;
ab@2053: 	struct e1000_buffer *buffer_info;
ab@2053: 	unsigned int i;
ab@2053: 	u32 cmd_length = 0;
ab@2053: 	u16 ipcse = 0, tucse, mss;
ab@2053: 	u8 ipcss, ipcso, tucss, tucso, hdr_len;
ab@2053: 	int err;
ab@2053: 
ab@2053: 	if (skb_is_gso(skb)) {
ab@2053: 		if (skb_header_cloned(skb)) {
ab@2053: 			err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
ab@2053: 			if (err)
ab@2053: 				return err;
ab@2053: 		}
ab@2053: 
ab@2053: 		hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
ab@2053: 		mss = skb_shinfo(skb)->gso_size;
ab@2053: 		if (skb->protocol == htons(ETH_P_IP)) {
ab@2053: 			struct iphdr *iph = ip_hdr(skb);
ab@2053: 			iph->tot_len = 0;
ab@2053: 			iph->check = 0;
ab@2053: 			tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
ab@2053: 								 iph->daddr, 0,
ab@2053: 								 IPPROTO_TCP,
ab@2053: 								 0);
ab@2053: 			cmd_length = E1000_TXD_CMD_IP;
ab@2053: 			ipcse = skb_transport_offset(skb) - 1;
ab@2053: 		} else if (skb->protocol == htons(ETH_P_IPV6)) {
ab@2053: 			ipv6_hdr(skb)->payload_len = 0;
ab@2053: 			tcp_hdr(skb)->check =
ab@2053: 				~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
ab@2053: 						 &ipv6_hdr(skb)->daddr,
ab@2053: 						 0, IPPROTO_TCP, 0);
ab@2053: 			ipcse = 0;
ab@2053: 		}
ab@2053: 		ipcss = skb_network_offset(skb);
ab@2053: 		ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
ab@2053: 		tucss = skb_transport_offset(skb);
ab@2053: 		tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
ab@2053: 		tucse = 0;
ab@2053: 
ab@2053: 		cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
ab@2053: 			       E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
ab@2053: 
ab@2053: 		i = tx_ring->next_to_use;
ab@2053: 		context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
ab@2053: 		buffer_info = &tx_ring->buffer_info[i];
ab@2053: 
ab@2053: 		context_desc->lower_setup.ip_fields.ipcss  = ipcss;
ab@2053: 		context_desc->lower_setup.ip_fields.ipcso  = ipcso;
ab@2053: 		context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
ab@2053: 		context_desc->upper_setup.tcp_fields.tucss = tucss;
ab@2053: 		context_desc->upper_setup.tcp_fields.tucso = tucso;
ab@2053: 		context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
ab@2053: 		context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
ab@2053: 		context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
ab@2053: 		context_desc->cmd_and_length = cpu_to_le32(cmd_length);
ab@2053: 
ab@2053: 		buffer_info->time_stamp = jiffies;
ab@2053: 		buffer_info->next_to_watch = i;
ab@2053: 
ab@2053: 		if (++i == tx_ring->count) i = 0;
ab@2053: 		tx_ring->next_to_use = i;
ab@2053: 
ab@2053: 		return true;
ab@2053: 	}
ab@2053: 	return false;
ab@2053: }
ab@2053: 
ab@2053: static bool e1000_tx_csum(struct e1000_adapter *adapter,
ab@2053: 			  struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
ab@2053: {
ab@2053: 	struct e1000_context_desc *context_desc;
ab@2053: 	struct e1000_buffer *buffer_info;
ab@2053: 	unsigned int i;
ab@2053: 	u8 css;
ab@2053: 	u32 cmd_len = E1000_TXD_CMD_DEXT;
ab@2053: 
ab@2053: 	if (skb->ip_summed != CHECKSUM_PARTIAL)
ab@2053: 		return false;
ab@2053: 
ab@2053: 	switch (skb->protocol) {
ab@2053: 	case cpu_to_be16(ETH_P_IP):
ab@2053: 		if (ip_hdr(skb)->protocol == IPPROTO_TCP)
ab@2053: 			cmd_len |= E1000_TXD_CMD_TCP;
ab@2053: 		break;
ab@2053: 	case cpu_to_be16(ETH_P_IPV6):
ab@2053: 		/* XXX not handling all IPV6 headers */
ab@2053: 		if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
ab@2053: 			cmd_len |= E1000_TXD_CMD_TCP;
ab@2053: 		break;
ab@2053: 	default:
ab@2053: 		if (unlikely(net_ratelimit()))
ab@2053: 			DPRINTK(DRV, WARNING,
ab@2053: 			        "checksum_partial proto=%x!\n", skb->protocol);
ab@2053: 		break;
ab@2053: 	}
ab@2053: 
ab@2053: 	css = skb_transport_offset(skb);
ab@2053: 
ab@2053: 	i = tx_ring->next_to_use;
ab@2053: 	buffer_info = &tx_ring->buffer_info[i];
ab@2053: 	context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
ab@2053: 
ab@2053: 	context_desc->lower_setup.ip_config = 0;
ab@2053: 	context_desc->upper_setup.tcp_fields.tucss = css;
ab@2053: 	context_desc->upper_setup.tcp_fields.tucso =
ab@2053: 		css + skb->csum_offset;
ab@2053: 	context_desc->upper_setup.tcp_fields.tucse = 0;
ab@2053: 	context_desc->tcp_seg_setup.data = 0;
ab@2053: 	context_desc->cmd_and_length = cpu_to_le32(cmd_len);
ab@2053: 
ab@2053: 	buffer_info->time_stamp = jiffies;
ab@2053: 	buffer_info->next_to_watch = i;
ab@2053: 
ab@2053: 	if (unlikely(++i == tx_ring->count)) i = 0;
ab@2053: 	tx_ring->next_to_use = i;
ab@2053: 
ab@2053: 	return true;
ab@2053: }
ab@2053: 
ab@2053: #define E1000_MAX_TXD_PWR	12
ab@2053: #define E1000_MAX_DATA_PER_TXD	(1<<E1000_MAX_TXD_PWR)
ab@2053: 
ab@2053: static int e1000_tx_map(struct e1000_adapter *adapter,
ab@2053: 			struct e1000_tx_ring *tx_ring,
ab@2053: 			struct sk_buff *skb, unsigned int first,
ab@2053: 			unsigned int max_per_txd, unsigned int nr_frags,
ab@2053: 			unsigned int mss)
ab@2053: {
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	struct pci_dev *pdev = adapter->pdev;
ab@2053: 	struct e1000_buffer *buffer_info;
ab@2053: 	unsigned int len = skb_headlen(skb);
ab@2053: 	unsigned int offset = 0, size, count = 0, i;
ab@2053: 	unsigned int f;
ab@2053: 
ab@2053: 	i = tx_ring->next_to_use;
ab@2053: 
ab@2053: 	while (len) {
ab@2053: 		buffer_info = &tx_ring->buffer_info[i];
ab@2053: 		size = min(len, max_per_txd);
ab@2053: 		/* Workaround for Controller erratum --
ab@2053: 		 * descriptor for non-tso packet in a linear SKB that follows a
ab@2053: 		 * tso gets written back prematurely before the data is fully
ab@2053: 		 * DMA'd to the controller */
ab@2053: 		if (!skb->data_len && tx_ring->last_tx_tso &&
ab@2053: 		    !skb_is_gso(skb)) {
ab@2053: 			tx_ring->last_tx_tso = 0;
ab@2053: 			size -= 4;
ab@2053: 		}
ab@2053: 
ab@2053: 		/* Workaround for premature desc write-backs
ab@2053: 		 * in TSO mode.  Append 4-byte sentinel desc */
ab@2053: 		if (unlikely(mss && !nr_frags && size == len && size > 8))
ab@2053: 			size -= 4;
ab@2053: 		/* work-around for errata 10 and it applies
ab@2053: 		 * to all controllers in PCI-X mode
ab@2053: 		 * The fix is to make sure that the first descriptor of a
ab@2053: 		 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
ab@2053: 		 */
ab@2053: 		if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
ab@2053: 		                (size > 2015) && count == 0))
ab@2053: 		        size = 2015;
ab@2053: 
ab@2053: 		/* Workaround for potential 82544 hang in PCI-X.  Avoid
ab@2053: 		 * terminating buffers within evenly-aligned dwords. */
ab@2053: 		if (unlikely(adapter->pcix_82544 &&
ab@2053: 		   !((unsigned long)(skb->data + offset + size - 1) & 4) &&
ab@2053: 		   size > 4))
ab@2053: 			size -= 4;
ab@2053: 
ab@2053: 		buffer_info->length = size;
ab@2053: 		/* set time_stamp *before* dma to help avoid a possible race */
ab@2053: 		buffer_info->time_stamp = jiffies;
ab@2053: 		buffer_info->mapped_as_page = false;
ab@2053: 		buffer_info->dma = pci_map_single(pdev,	skb->data + offset,
ab@2053: 						  size,	PCI_DMA_TODEVICE);
ab@2053: 		if (pci_dma_mapping_error(pdev, buffer_info->dma))
ab@2053: 			goto dma_error;
ab@2053: 		buffer_info->next_to_watch = i;
ab@2053: 
ab@2053: 		len -= size;
ab@2053: 		offset += size;
ab@2053: 		count++;
ab@2053: 		if (len) {
ab@2053: 			i++;
ab@2053: 			if (unlikely(i == tx_ring->count))
ab@2053: 				i = 0;
ab@2053: 		}
ab@2053: 	}
ab@2053: 
ab@2053: 	for (f = 0; f < nr_frags; f++) {
ab@2053: 		struct skb_frag_struct *frag;
ab@2053: 
ab@2053: 		frag = &skb_shinfo(skb)->frags[f];
ab@2053: 		len = frag->size;
ab@2053: 		offset = frag->page_offset;
ab@2053: 
ab@2053: 		while (len) {
ab@2053: 			i++;
ab@2053: 			if (unlikely(i == tx_ring->count))
ab@2053: 				i = 0;
ab@2053: 
ab@2053: 			buffer_info = &tx_ring->buffer_info[i];
ab@2053: 			size = min(len, max_per_txd);
ab@2053: 			/* Workaround for premature desc write-backs
ab@2053: 			 * in TSO mode.  Append 4-byte sentinel desc */
ab@2053: 			if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
ab@2053: 				size -= 4;
ab@2053: 			/* Workaround for potential 82544 hang in PCI-X.
ab@2053: 			 * Avoid terminating buffers within evenly-aligned
ab@2053: 			 * dwords. */
ab@2053: 			if (unlikely(adapter->pcix_82544 &&
ab@2053: 			    !((unsigned long)(page_to_phys(frag->page) + offset
ab@2053: 			                      + size - 1) & 4) &&
ab@2053: 			    size > 4))
ab@2053: 				size -= 4;
ab@2053: 
ab@2053: 			buffer_info->length = size;
ab@2053: 			buffer_info->time_stamp = jiffies;
ab@2053: 			buffer_info->mapped_as_page = true;
ab@2053: 			buffer_info->dma = pci_map_page(pdev, frag->page,
ab@2053: 							offset,	size,
ab@2053: 							PCI_DMA_TODEVICE);
ab@2053: 			if (pci_dma_mapping_error(pdev, buffer_info->dma))
ab@2053: 				goto dma_error;
ab@2053: 			buffer_info->next_to_watch = i;
ab@2053: 
ab@2053: 			len -= size;
ab@2053: 			offset += size;
ab@2053: 			count++;
ab@2053: 		}
ab@2053: 	}
ab@2053: 
ab@2053: 	tx_ring->buffer_info[i].skb = skb;
ab@2053: 	tx_ring->buffer_info[first].next_to_watch = i;
ab@2053: 
ab@2053: 	return count;
ab@2053: 
ab@2053: dma_error:
ab@2053: 	dev_err(&pdev->dev, "TX DMA map failed\n");
ab@2053: 	buffer_info->dma = 0;
ab@2053: 	if (count)
ab@2053: 		count--;
ab@2053: 
ab@2053: 	while (count--) {
ab@2053: 		if (i==0)
ab@2053: 			i += tx_ring->count;
ab@2053: 		i--;
ab@2053: 		buffer_info = &tx_ring->buffer_info[i];
ab@2053: 		e1000_unmap_and_free_tx_resource(adapter, buffer_info);
ab@2053: 	}
ab@2053: 
ab@2053: 	return 0;
ab@2053: }
ab@2053: 
ab@2053: static void e1000_tx_queue(struct e1000_adapter *adapter,
ab@2053: 			   struct e1000_tx_ring *tx_ring, int tx_flags,
ab@2053: 			   int count)
ab@2053: {
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	struct e1000_tx_desc *tx_desc = NULL;
ab@2053: 	struct e1000_buffer *buffer_info;
ab@2053: 	u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
ab@2053: 	unsigned int i;
ab@2053: 
ab@2053: 	if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
ab@2053: 		txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
ab@2053: 		             E1000_TXD_CMD_TSE;
ab@2053: 		txd_upper |= E1000_TXD_POPTS_TXSM << 8;
ab@2053: 
ab@2053: 		if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
ab@2053: 			txd_upper |= E1000_TXD_POPTS_IXSM << 8;
ab@2053: 	}
ab@2053: 
ab@2053: 	if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
ab@2053: 		txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
ab@2053: 		txd_upper |= E1000_TXD_POPTS_TXSM << 8;
ab@2053: 	}
ab@2053: 
ab@2053: 	if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
ab@2053: 		txd_lower |= E1000_TXD_CMD_VLE;
ab@2053: 		txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
ab@2053: 	}
ab@2053: 
ab@2053: 	i = tx_ring->next_to_use;
ab@2053: 
ab@2053: 	while (count--) {
ab@2053: 		buffer_info = &tx_ring->buffer_info[i];
ab@2053: 		tx_desc = E1000_TX_DESC(*tx_ring, i);
ab@2053: 		tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
ab@2053: 		tx_desc->lower.data =
ab@2053: 			cpu_to_le32(txd_lower | buffer_info->length);
ab@2053: 		tx_desc->upper.data = cpu_to_le32(txd_upper);
ab@2053: 		if (unlikely(++i == tx_ring->count)) i = 0;
ab@2053: 	}
ab@2053: 
ab@2053: 	tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
ab@2053: 
ab@2053: 	/* Force memory writes to complete before letting h/w
ab@2053: 	 * know there are new descriptors to fetch.  (Only
ab@2053: 	 * applicable for weak-ordered memory model archs,
ab@2053: 	 * such as IA-64). */
ab@2053: 	wmb();
ab@2053: 
ab@2053: 	tx_ring->next_to_use = i;
ab@2053: 	writel(i, hw->hw_addr + tx_ring->tdt);
ab@2053: 	/* we need this if more than one processor can write to our tail
ab@2053: 	 * at a time, it syncronizes IO on IA64/Altix systems */
ab@2053: 	mmiowb();
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * 82547 workaround to avoid controller hang in half-duplex environment.
ab@2053:  * The workaround is to avoid queuing a large packet that would span
ab@2053:  * the internal Tx FIFO ring boundary by notifying the stack to resend
ab@2053:  * the packet at a later time.  This gives the Tx FIFO an opportunity to
ab@2053:  * flush all packets.  When that occurs, we reset the Tx FIFO pointers
ab@2053:  * to the beginning of the Tx FIFO.
ab@2053:  **/
ab@2053: 
ab@2053: #define E1000_FIFO_HDR			0x10
ab@2053: #define E1000_82547_PAD_LEN		0x3E0
ab@2053: 
ab@2053: static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
ab@2053: 				       struct sk_buff *skb)
ab@2053: {
ab@2053: 	u32 fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
ab@2053: 	u32 skb_fifo_len = skb->len + E1000_FIFO_HDR;
ab@2053: 
ab@2053: 	skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR);
ab@2053: 
ab@2053: 	if (adapter->link_duplex != HALF_DUPLEX)
ab@2053: 		goto no_fifo_stall_required;
ab@2053: 
ab@2053: 	if (atomic_read(&adapter->tx_fifo_stall))
ab@2053: 		return 1;
ab@2053: 
ab@2053: 	if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
ab@2053: 		atomic_set(&adapter->tx_fifo_stall, 1);
ab@2053: 		return 1;
ab@2053: 	}
ab@2053: 
ab@2053: no_fifo_stall_required:
ab@2053: 	adapter->tx_fifo_head += skb_fifo_len;
ab@2053: 	if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
ab@2053: 		adapter->tx_fifo_head -= adapter->tx_fifo_size;
ab@2053: 	return 0;
ab@2053: }
ab@2053: 
ab@2053: static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
ab@2053: {
ab@2053: 	struct e1000_adapter *adapter = netdev_priv(netdev);
ab@2053: 	struct e1000_tx_ring *tx_ring = adapter->tx_ring;
ab@2053: 
ab@2053: 	netif_stop_queue(netdev);
ab@2053: 	/* Herbert's original patch had:
ab@2053: 	 *  smp_mb__after_netif_stop_queue();
ab@2053: 	 * but since that doesn't exist yet, just open code it. */
ab@2053: 	smp_mb();
ab@2053: 
ab@2053: 	/* We need to check again in a case another CPU has just
ab@2053: 	 * made room available. */
ab@2053: 	if (likely(E1000_DESC_UNUSED(tx_ring) < size))
ab@2053: 		return -EBUSY;
ab@2053: 
ab@2053: 	/* A reprieve! */
ab@2053: 	netif_start_queue(netdev);
ab@2053: 	++adapter->restart_queue;
ab@2053: 	return 0;
ab@2053: }
ab@2053: 
ab@2053: static int e1000_maybe_stop_tx(struct net_device *netdev,
ab@2053:                                struct e1000_tx_ring *tx_ring, int size)
ab@2053: {
ab@2053: 	if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
ab@2053: 		return 0;
ab@2053: 	return __e1000_maybe_stop_tx(netdev, size);
ab@2053: }
ab@2053: 
ab@2053: #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
ab@2053: static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
ab@2053: 				    struct net_device *netdev)
ab@2053: {
ab@2053: 	struct e1000_adapter *adapter = netdev_priv(netdev);
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	struct e1000_tx_ring *tx_ring;
ab@2053: 	unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
ab@2053: 	unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
ab@2053: 	unsigned int tx_flags = 0;
ab@2053: 	unsigned int len = skb->len - skb->data_len;
ab@2053: 	unsigned int nr_frags = 0;
ab@2053: 	unsigned int mss = 0;
ab@2053: 	int count = 0;
ab@2053: 	int tso;
ab@2053: 	unsigned int f;
ab@2053: 
ab@2053: 	/* This goes back to the question of how to logically map a tx queue
ab@2053: 	 * to a flow.  Right now, performance is impacted slightly negatively
ab@2053: 	 * if using multiple tx queues.  If the stack breaks away from a
ab@2053: 	 * single qdisc implementation, we can look at this again. */
ab@2053: 	tx_ring = adapter->tx_ring;
ab@2053: 
ab@2053: 	if (unlikely(skb->len <= 0)) {
ab@2053: 		if (!adapter->ecdev)
ab@2053: 			dev_kfree_skb_any(skb);
ab@2053: 		return NETDEV_TX_OK;
ab@2053: 	}
ab@2053: 
ab@2053: 	mss = skb_shinfo(skb)->gso_size;
ab@2053: 	/* The controller does a simple calculation to
ab@2053: 	 * make sure there is enough room in the FIFO before
ab@2053: 	 * initiating the DMA for each buffer.  The calc is:
ab@2053: 	 * 4 = ceil(buffer len/mss).  To make sure we don't
ab@2053: 	 * overrun the FIFO, adjust the max buffer len if mss
ab@2053: 	 * drops. */
ab@2053: 	if (mss) {
ab@2053: 		u8 hdr_len;
ab@2053: 		max_per_txd = min(mss << 2, max_per_txd);
ab@2053: 		max_txd_pwr = fls(max_per_txd) - 1;
ab@2053: 
ab@2053: 		hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
ab@2053: 		if (skb->data_len && hdr_len == len) {
ab@2053: 			switch (hw->mac_type) {
ab@2053: 				unsigned int pull_size;
ab@2053: 			case e1000_82544:
ab@2053: 				/* Make sure we have room to chop off 4 bytes,
ab@2053: 				 * and that the end alignment will work out to
ab@2053: 				 * this hardware's requirements
ab@2053: 				 * NOTE: this is a TSO only workaround
ab@2053: 				 * if end byte alignment not correct move us
ab@2053: 				 * into the next dword */
ab@2053: 				if ((unsigned long)(skb_tail_pointer(skb) - 1) & 4)
ab@2053: 					break;
ab@2053: 				/* fall through */
ab@2053: 				pull_size = min((unsigned int)4, skb->data_len);
ab@2053: 				if (!__pskb_pull_tail(skb, pull_size)) {
ab@2053: 					DPRINTK(DRV, ERR,
ab@2053: 						"__pskb_pull_tail failed.\n");
ab@2053: 					dev_kfree_skb_any(skb);
ab@2053: 					return NETDEV_TX_OK;
ab@2053: 				}
ab@2053: 				len = skb->len - skb->data_len;
ab@2053: 				break;
ab@2053: 			default:
ab@2053: 				/* do nothing */
ab@2053: 				break;
ab@2053: 			}
ab@2053: 		}
ab@2053: 	}
ab@2053: 
ab@2053: 	/* reserve a descriptor for the offload context */
ab@2053: 	if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
ab@2053: 		count++;
ab@2053: 	count++;
ab@2053: 
ab@2053: 	/* Controller Erratum workaround */
ab@2053: 	if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
ab@2053: 		count++;
ab@2053: 
ab@2053: 	count += TXD_USE_COUNT(len, max_txd_pwr);
ab@2053: 
ab@2053: 	if (adapter->pcix_82544)
ab@2053: 		count++;
ab@2053: 
ab@2053: 	/* work-around for errata 10 and it applies to all controllers
ab@2053: 	 * in PCI-X mode, so add one more descriptor to the count
ab@2053: 	 */
ab@2053: 	if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
ab@2053: 			(len > 2015)))
ab@2053: 		count++;
ab@2053: 
ab@2053: 	nr_frags = skb_shinfo(skb)->nr_frags;
ab@2053: 	for (f = 0; f < nr_frags; f++)
ab@2053: 		count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
ab@2053: 				       max_txd_pwr);
ab@2053: 	if (adapter->pcix_82544)
ab@2053: 		count += nr_frags;
ab@2053: 
ab@2053: 	/* need: count + 2 desc gap to keep tail from touching
ab@2053: 	 * head, otherwise try next time */
ab@2053: 	if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2)))
ab@2053: 		return NETDEV_TX_BUSY;
ab@2053: 
ab@2053: 	if (unlikely(hw->mac_type == e1000_82547)) {
ab@2053: 		if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
ab@2053: 			if (!adapter->ecdev) {
ab@2053: 				netif_stop_queue(netdev);
ab@2053: 				if (!test_bit(__E1000_DOWN, &adapter->flags))
ab@2053: 					mod_timer(&adapter->tx_fifo_stall_timer,
ab@2053: 					          jiffies + 1);
ab@2053: 			}
ab@2053: 			return NETDEV_TX_BUSY;
ab@2053: 		}
ab@2053: 	}
ab@2053: 
ab@2053: 	if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
ab@2053: 		tx_flags |= E1000_TX_FLAGS_VLAN;
ab@2053: 		tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
ab@2053: 	}
ab@2053: 
ab@2053: 	first = tx_ring->next_to_use;
ab@2053: 
ab@2053: 	tso = e1000_tso(adapter, tx_ring, skb);
ab@2053: 	if (tso < 0) {
ab@2053: 		if (!adapter->ecdev) {
ab@2053: 			dev_kfree_skb_any(skb);
ab@2053: 		}
ab@2053: 		return NETDEV_TX_OK;
ab@2053: 	}
ab@2053: 
ab@2053: 	if (likely(tso)) {
ab@2053: 		if (likely(hw->mac_type != e1000_82544))
ab@2053: 			tx_ring->last_tx_tso = 1;
ab@2053: 		tx_flags |= E1000_TX_FLAGS_TSO;
ab@2053: 	} else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
ab@2053: 		tx_flags |= E1000_TX_FLAGS_CSUM;
ab@2053: 
ab@2053: 	if (likely(skb->protocol == htons(ETH_P_IP)))
ab@2053: 		tx_flags |= E1000_TX_FLAGS_IPV4;
ab@2053: 
ab@2053: 	count = e1000_tx_map(adapter, tx_ring, skb, first, max_per_txd,
ab@2053: 	                     nr_frags, mss);
ab@2053: 
ab@2053: 	if (count) {
ab@2053: 		e1000_tx_queue(adapter, tx_ring, tx_flags, count);
ab@2053: 		if (!adapter->ecdev) {
ab@2053: 			/* Make sure there is space in the ring for the next send. */
ab@2053: 			e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
ab@2053: 		}
ab@2053: 
ab@2053: 	} else {
ab@2053: 		if (!adapter->ecdev) dev_kfree_skb_any(skb);
ab@2053: 		tx_ring->buffer_info[first].time_stamp = 0;
ab@2053: 		tx_ring->next_to_use = first;
ab@2053: 	}
ab@2053: 
ab@2053: 	return NETDEV_TX_OK;
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_tx_timeout - Respond to a Tx Hang
ab@2053:  * @netdev: network interface device structure
ab@2053:  **/
ab@2053: 
ab@2053: static void e1000_tx_timeout(struct net_device *netdev)
ab@2053: {
ab@2053: 	struct e1000_adapter *adapter = netdev_priv(netdev);
ab@2053: 
ab@2053: 	/* Do the reset outside of interrupt context */
ab@2053: 	adapter->tx_timeout_count++;
ab@2053: 	schedule_work(&adapter->reset_task);
ab@2053: }
ab@2053: 
ab@2053: static void e1000_reset_task(struct work_struct *work)
ab@2053: {
ab@2053: 	struct e1000_adapter *adapter =
ab@2053: 		container_of(work, struct e1000_adapter, reset_task);
ab@2053: 
ab@2053: 	e1000_reinit_locked(adapter);
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_get_stats - Get System Network Statistics
ab@2053:  * @netdev: network interface device structure
ab@2053:  *
ab@2053:  * Returns the address of the device statistics structure.
ab@2053:  * The statistics are actually updated from the timer callback.
ab@2053:  **/
ab@2053: 
ab@2053: static struct net_device_stats *e1000_get_stats(struct net_device *netdev)
ab@2053: {
ab@2053: 	/* only return the current stats */
ab@2053: 	return &netdev->stats;
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_change_mtu - Change the Maximum Transfer Unit
ab@2053:  * @netdev: network interface device structure
ab@2053:  * @new_mtu: new value for maximum frame size
ab@2053:  *
ab@2053:  * Returns 0 on success, negative on failure
ab@2053:  **/
ab@2053: 
ab@2053: static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
ab@2053: {
ab@2053: 	struct e1000_adapter *adapter = netdev_priv(netdev);
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
ab@2053: 
ab@2053: 	if (adapter->ecdev)
ab@2053: 		return -EBUSY;
ab@2053: 
ab@2053: 	if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
ab@2053: 	    (max_frame > MAX_JUMBO_FRAME_SIZE)) {
ab@2053: 		DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
ab@2053: 		return -EINVAL;
ab@2053: 	}
ab@2053: 
ab@2053: 	/* Adapter-specific max frame size limits. */
ab@2053: 	switch (hw->mac_type) {
ab@2053: 	case e1000_undefined ... e1000_82542_rev2_1:
ab@2053: 		if (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)) {
ab@2053: 			DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n");
ab@2053: 			return -EINVAL;
ab@2053: 		}
ab@2053: 		break;
ab@2053: 	default:
ab@2053: 		/* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
ab@2053: 		break;
ab@2053: 	}
ab@2053: 
ab@2053: 	while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
ab@2053: 		msleep(1);
ab@2053: 	/* e1000_down has a dependency on max_frame_size */
ab@2053: 	hw->max_frame_size = max_frame;
ab@2053: 	if (netif_running(netdev))
ab@2053: 		e1000_down(adapter);
ab@2053: 
ab@2053: 	/* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
ab@2053: 	 * means we reserve 2 more, this pushes us to allocate from the next
ab@2053: 	 * larger slab size.
ab@2053: 	 * i.e. RXBUFFER_2048 --> size-4096 slab
ab@2053: 	 *  however with the new *_jumbo_rx* routines, jumbo receives will use
ab@2053: 	 *  fragmented skbs */
ab@2053: 
ab@2053: 	if (max_frame <= E1000_RXBUFFER_2048)
ab@2053: 		adapter->rx_buffer_len = E1000_RXBUFFER_2048;
ab@2053: 	else
ab@2053: #if (PAGE_SIZE >= E1000_RXBUFFER_16384)
ab@2053: 		adapter->rx_buffer_len = E1000_RXBUFFER_16384;
ab@2053: #elif (PAGE_SIZE >= E1000_RXBUFFER_4096)
ab@2053: 		adapter->rx_buffer_len = PAGE_SIZE;
ab@2053: #endif
ab@2053: 
ab@2053: 	/* adjust allocation if LPE protects us, and we aren't using SBP */
ab@2053: 	if (!hw->tbi_compatibility_on &&
ab@2053: 	    ((max_frame == (ETH_FRAME_LEN + ETH_FCS_LEN)) ||
ab@2053: 	     (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
ab@2053: 		adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
ab@2053: 
ab@2053: 	printk(KERN_INFO "e1000: %s changing MTU from %d to %d\n",
ab@2053: 	       netdev->name, netdev->mtu, new_mtu);
ab@2053: 	netdev->mtu = new_mtu;
ab@2053: 
ab@2053: 	if (netif_running(netdev))
ab@2053: 		e1000_up(adapter);
ab@2053: 	else
ab@2053: 		e1000_reset(adapter);
ab@2053: 
ab@2053: 	clear_bit(__E1000_RESETTING, &adapter->flags);
ab@2053: 
ab@2053: 	return 0;
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_update_stats - Update the board statistics counters
ab@2053:  * @adapter: board private structure
ab@2053:  **/
ab@2053: 
ab@2053: void e1000_update_stats(struct e1000_adapter *adapter)
ab@2053: {
ab@2053: 	struct net_device *netdev = adapter->netdev;
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	struct pci_dev *pdev = adapter->pdev;
ab@2053: 	unsigned long flags = 0;
ab@2053: 	u16 phy_tmp;
ab@2053: 
ab@2053: #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
ab@2053: 
ab@2053: 	/*
ab@2053: 	 * Prevent stats update while adapter is being reset, or if the pci
ab@2053: 	 * connection is down.
ab@2053: 	 */
ab@2053: 	if (adapter->link_speed == 0)
ab@2053: 		return;
ab@2053: 	if (pci_channel_offline(pdev))
ab@2053: 		return;
ab@2053: 
ab@2053: 	if (!adapter->ecdev)
ab@2053: 		spin_lock_irqsave(&adapter->stats_lock, flags);
ab@2053: 
ab@2053: 	/* these counters are modified from e1000_tbi_adjust_stats,
ab@2053: 	 * called from the interrupt context, so they must only
ab@2053: 	 * be written while holding adapter->stats_lock
ab@2053: 	 */
ab@2053: 
ab@2053: 	adapter->stats.crcerrs += er32(CRCERRS);
ab@2053: 	adapter->stats.gprc += er32(GPRC);
ab@2053: 	adapter->stats.gorcl += er32(GORCL);
ab@2053: 	adapter->stats.gorch += er32(GORCH);
ab@2053: 	adapter->stats.bprc += er32(BPRC);
ab@2053: 	adapter->stats.mprc += er32(MPRC);
ab@2053: 	adapter->stats.roc += er32(ROC);
ab@2053: 
ab@2053: 	adapter->stats.prc64 += er32(PRC64);
ab@2053: 	adapter->stats.prc127 += er32(PRC127);
ab@2053: 	adapter->stats.prc255 += er32(PRC255);
ab@2053: 	adapter->stats.prc511 += er32(PRC511);
ab@2053: 	adapter->stats.prc1023 += er32(PRC1023);
ab@2053: 	adapter->stats.prc1522 += er32(PRC1522);
ab@2053: 
ab@2053: 	adapter->stats.symerrs += er32(SYMERRS);
ab@2053: 	adapter->stats.mpc += er32(MPC);
ab@2053: 	adapter->stats.scc += er32(SCC);
ab@2053: 	adapter->stats.ecol += er32(ECOL);
ab@2053: 	adapter->stats.mcc += er32(MCC);
ab@2053: 	adapter->stats.latecol += er32(LATECOL);
ab@2053: 	adapter->stats.dc += er32(DC);
ab@2053: 	adapter->stats.sec += er32(SEC);
ab@2053: 	adapter->stats.rlec += er32(RLEC);
ab@2053: 	adapter->stats.xonrxc += er32(XONRXC);
ab@2053: 	adapter->stats.xontxc += er32(XONTXC);
ab@2053: 	adapter->stats.xoffrxc += er32(XOFFRXC);
ab@2053: 	adapter->stats.xofftxc += er32(XOFFTXC);
ab@2053: 	adapter->stats.fcruc += er32(FCRUC);
ab@2053: 	adapter->stats.gptc += er32(GPTC);
ab@2053: 	adapter->stats.gotcl += er32(GOTCL);
ab@2053: 	adapter->stats.gotch += er32(GOTCH);
ab@2053: 	adapter->stats.rnbc += er32(RNBC);
ab@2053: 	adapter->stats.ruc += er32(RUC);
ab@2053: 	adapter->stats.rfc += er32(RFC);
ab@2053: 	adapter->stats.rjc += er32(RJC);
ab@2053: 	adapter->stats.torl += er32(TORL);
ab@2053: 	adapter->stats.torh += er32(TORH);
ab@2053: 	adapter->stats.totl += er32(TOTL);
ab@2053: 	adapter->stats.toth += er32(TOTH);
ab@2053: 	adapter->stats.tpr += er32(TPR);
ab@2053: 
ab@2053: 	adapter->stats.ptc64 += er32(PTC64);
ab@2053: 	adapter->stats.ptc127 += er32(PTC127);
ab@2053: 	adapter->stats.ptc255 += er32(PTC255);
ab@2053: 	adapter->stats.ptc511 += er32(PTC511);
ab@2053: 	adapter->stats.ptc1023 += er32(PTC1023);
ab@2053: 	adapter->stats.ptc1522 += er32(PTC1522);
ab@2053: 
ab@2053: 	adapter->stats.mptc += er32(MPTC);
ab@2053: 	adapter->stats.bptc += er32(BPTC);
ab@2053: 
ab@2053: 	/* used for adaptive IFS */
ab@2053: 
ab@2053: 	hw->tx_packet_delta = er32(TPT);
ab@2053: 	adapter->stats.tpt += hw->tx_packet_delta;
ab@2053: 	hw->collision_delta = er32(COLC);
ab@2053: 	adapter->stats.colc += hw->collision_delta;
ab@2053: 
ab@2053: 	if (hw->mac_type >= e1000_82543) {
ab@2053: 		adapter->stats.algnerrc += er32(ALGNERRC);
ab@2053: 		adapter->stats.rxerrc += er32(RXERRC);
ab@2053: 		adapter->stats.tncrs += er32(TNCRS);
ab@2053: 		adapter->stats.cexterr += er32(CEXTERR);
ab@2053: 		adapter->stats.tsctc += er32(TSCTC);
ab@2053: 		adapter->stats.tsctfc += er32(TSCTFC);
ab@2053: 	}
ab@2053: 
ab@2053: 	/* Fill out the OS statistics structure */
ab@2053: 	netdev->stats.multicast = adapter->stats.mprc;
ab@2053: 	netdev->stats.collisions = adapter->stats.colc;
ab@2053: 
ab@2053: 	/* Rx Errors */
ab@2053: 
ab@2053: 	/* RLEC on some newer hardware can be incorrect so build
ab@2053: 	* our own version based on RUC and ROC */
ab@2053: 	netdev->stats.rx_errors = adapter->stats.rxerrc +
ab@2053: 		adapter->stats.crcerrs + adapter->stats.algnerrc +
ab@2053: 		adapter->stats.ruc + adapter->stats.roc +
ab@2053: 		adapter->stats.cexterr;
ab@2053: 	adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
ab@2053: 	netdev->stats.rx_length_errors = adapter->stats.rlerrc;
ab@2053: 	netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
ab@2053: 	netdev->stats.rx_frame_errors = adapter->stats.algnerrc;
ab@2053: 	netdev->stats.rx_missed_errors = adapter->stats.mpc;
ab@2053: 
ab@2053: 	/* Tx Errors */
ab@2053: 	adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
ab@2053: 	netdev->stats.tx_errors = adapter->stats.txerrc;
ab@2053: 	netdev->stats.tx_aborted_errors = adapter->stats.ecol;
ab@2053: 	netdev->stats.tx_window_errors = adapter->stats.latecol;
ab@2053: 	netdev->stats.tx_carrier_errors = adapter->stats.tncrs;
ab@2053: 	if (hw->bad_tx_carr_stats_fd &&
ab@2053: 	    adapter->link_duplex == FULL_DUPLEX) {
ab@2053: 		netdev->stats.tx_carrier_errors = 0;
ab@2053: 		adapter->stats.tncrs = 0;
ab@2053: 	}
ab@2053: 
ab@2053: 	/* Tx Dropped needs to be maintained elsewhere */
ab@2053: 
ab@2053: 	/* Phy Stats */
ab@2053: 	if (hw->media_type == e1000_media_type_copper) {
ab@2053: 		if ((adapter->link_speed == SPEED_1000) &&
ab@2053: 		   (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
ab@2053: 			phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
ab@2053: 			adapter->phy_stats.idle_errors += phy_tmp;
ab@2053: 		}
ab@2053: 
ab@2053: 		if ((hw->mac_type <= e1000_82546) &&
ab@2053: 		   (hw->phy_type == e1000_phy_m88) &&
ab@2053: 		   !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
ab@2053: 			adapter->phy_stats.receive_errors += phy_tmp;
ab@2053: 	}
ab@2053: 
ab@2053: 	/* Management Stats */
ab@2053: 	if (hw->has_smbus) {
ab@2053: 		adapter->stats.mgptc += er32(MGTPTC);
ab@2053: 		adapter->stats.mgprc += er32(MGTPRC);
ab@2053: 		adapter->stats.mgpdc += er32(MGTPDC);
ab@2053: 	}
ab@2053: 
ab@2053: 	if (!adapter->ecdev)
ab@2053: 		spin_unlock_irqrestore(&adapter->stats_lock, flags);
ab@2053: }
ab@2053: 
ab@2053: void ec_poll(struct net_device *netdev)
ab@2053: {
ab@2053: 	struct e1000_adapter *adapter = netdev_priv(netdev);
ab@2053: 	if (jiffies - adapter->ec_watchdog_jiffies >= 2 * HZ) {
ab@2053: 		e1000_watchdog((unsigned long) adapter);
ab@2053: 		adapter->ec_watchdog_jiffies = jiffies;
ab@2053: 	}
ab@2053: 
ab@2053: 	e1000_intr(0, netdev);
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_intr - Interrupt Handler
ab@2053:  * @irq: interrupt number
ab@2053:  * @data: pointer to a network interface device structure
ab@2053:  **/
ab@2053: 
ab@2053: static irqreturn_t e1000_intr(int irq, void *data)
ab@2053: {
ab@2053: 	struct net_device *netdev = data;
ab@2053: 	struct e1000_adapter *adapter = netdev_priv(netdev);
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	u32 icr = er32(ICR);
ab@2053: 
ab@2053: 	if (unlikely((!icr) || test_bit(__E1000_DOWN, &adapter->flags)))
ab@2053: 		return IRQ_NONE;  /* Not our interrupt */
ab@2053: 
ab@2053: 	if (!adapter->ecdev && unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
ab@2053: 		hw->get_link_status = 1;
ab@2053: 		/* guard against interrupt when we're going down */
ab@2053: 		if (!test_bit(__E1000_DOWN, &adapter->flags))
ab@2053: 			mod_timer(&adapter->watchdog_timer, jiffies + 1);
ab@2053: 	}
ab@2053: 
ab@2053: 	if (adapter->ecdev) {
ab@2053: 		int i, ec_work_done = 0;
ab@2053: 		for (i = 0; i < E1000_MAX_INTR; i++) {
ab@2053: 			if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring,
ab@2053: 							&ec_work_done, 100) &
ab@2053: 						!e1000_clean_tx_irq(adapter, adapter->tx_ring))) {
ab@2053: 				break;
ab@2053: 			}
ab@2053: 		}
ab@2053: 	} else {
ab@2053: 		/* disable interrupts, without the synchronize_irq bit */
ab@2053: 		ew32(IMC, ~0);
ab@2053: 		E1000_WRITE_FLUSH();
ab@2053: 
ab@2053: 		if (likely(napi_schedule_prep(&adapter->napi))) {
ab@2053: 			adapter->total_tx_bytes = 0;
ab@2053: 			adapter->total_tx_packets = 0;
ab@2053: 			adapter->total_rx_bytes = 0;
ab@2053: 			adapter->total_rx_packets = 0;
ab@2053: 			__napi_schedule(&adapter->napi);
ab@2053: 		} else {
ab@2053: 			/* this really should not happen! if it does it is basically a
ab@2053: 			 * bug, but not a hard error, so enable ints and continue */
ab@2053: 			if (!test_bit(__E1000_DOWN, &adapter->flags))
ab@2053: 				e1000_irq_enable(adapter);
ab@2053: 		}
ab@2053: 	}
ab@2053: 
ab@2053: 	return IRQ_HANDLED;
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_clean - NAPI Rx polling callback
ab@2053:  * @adapter: board private structure
ab@2053:  * EtherCAT: never called
ab@2053:  **/
ab@2053: static int e1000_clean(struct napi_struct *napi, int budget)
ab@2053: {
ab@2053: 	struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
ab@2053: 	int tx_clean_complete = 0, work_done = 0;
ab@2053: 
ab@2053: 	tx_clean_complete = e1000_clean_tx_irq(adapter, &adapter->tx_ring[0]);
ab@2053: 
ab@2053: 	adapter->clean_rx(adapter, &adapter->rx_ring[0], &work_done, budget);
ab@2053: 
ab@2053: 	if (!tx_clean_complete)
ab@2053: 		work_done = budget;
ab@2053: 
ab@2053: 	/* If budget not fully consumed, exit the polling mode */
ab@2053: 	if (work_done < budget) {
ab@2053: 		if (likely(adapter->itr_setting & 3))
ab@2053: 			e1000_set_itr(adapter);
ab@2053: 		napi_complete(napi);
ab@2053: 		if (!test_bit(__E1000_DOWN, &adapter->flags))
ab@2053: 			e1000_irq_enable(adapter);
ab@2053: 	}
ab@2053: 
ab@2053: 	return work_done;
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_clean_tx_irq - Reclaim resources after transmit completes
ab@2053:  * @adapter: board private structure
ab@2053:  **/
ab@2053: static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
ab@2053: 			       struct e1000_tx_ring *tx_ring)
ab@2053: {
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	struct net_device *netdev = adapter->netdev;
ab@2053: 	struct e1000_tx_desc *tx_desc, *eop_desc;
ab@2053: 	struct e1000_buffer *buffer_info;
ab@2053: 	unsigned int i, eop;
ab@2053: 	unsigned int count = 0;
ab@2053: 	unsigned int total_tx_bytes=0, total_tx_packets=0;
ab@2053: 
ab@2053: 	i = tx_ring->next_to_clean;
ab@2053: 	eop = tx_ring->buffer_info[i].next_to_watch;
ab@2053: 	eop_desc = E1000_TX_DESC(*tx_ring, eop);
ab@2053: 
ab@2053: 	while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
ab@2053: 	       (count < tx_ring->count)) {
ab@2053: 		bool cleaned = false;
ab@2053: 		for ( ; !cleaned; count++) {
ab@2053: 			tx_desc = E1000_TX_DESC(*tx_ring, i);
ab@2053: 			buffer_info = &tx_ring->buffer_info[i];
ab@2053: 			cleaned = (i == eop);
ab@2053: 
ab@2053: 			if (cleaned) {
ab@2053: 				struct sk_buff *skb = buffer_info->skb;
ab@2053: 				unsigned int segs, bytecount;
ab@2053: 				segs = skb_shinfo(skb)->gso_segs ?: 1;
ab@2053: 				/* multiply data chunks by size of headers */
ab@2053: 				bytecount = ((segs - 1) * skb_headlen(skb)) +
ab@2053: 				            skb->len;
ab@2053: 				total_tx_packets += segs;
ab@2053: 				total_tx_bytes += bytecount;
ab@2053: 			}
ab@2053: 			e1000_unmap_and_free_tx_resource(adapter, buffer_info);
ab@2053: 			tx_desc->upper.data = 0;
ab@2053: 
ab@2053: 			if (unlikely(++i == tx_ring->count)) i = 0;
ab@2053: 		}
ab@2053: 
ab@2053: 		eop = tx_ring->buffer_info[i].next_to_watch;
ab@2053: 		eop_desc = E1000_TX_DESC(*tx_ring, eop);
ab@2053: 	}
ab@2053: 
ab@2053: 	tx_ring->next_to_clean = i;
ab@2053: 
ab@2053: #define TX_WAKE_THRESHOLD 32
ab@2053: 	if (!adapter->ecdev && unlikely(count && netif_carrier_ok(netdev) &&
ab@2053: 		     E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
ab@2053: 		/* Make sure that anybody stopping the queue after this
ab@2053: 		 * sees the new next_to_clean.
ab@2053: 		 */
ab@2053: 		smp_mb();
ab@2053: 
ab@2053: 		if (netif_queue_stopped(netdev) &&
ab@2053: 		    !(test_bit(__E1000_DOWN, &adapter->flags))) {
ab@2053: 			netif_wake_queue(netdev);
ab@2053: 			++adapter->restart_queue;
ab@2053: 		}
ab@2053: 	}
ab@2053: 
ab@2053: 	if (!adapter->ecdev && adapter->detect_tx_hung) {
ab@2053: 		/* Detect a transmit hang in hardware, this serializes the
ab@2053: 		 * check with the clearing of time_stamp and movement of i */
ab@2053: 		adapter->detect_tx_hung = false;
ab@2053: 		if (tx_ring->buffer_info[eop].time_stamp &&
ab@2053: 		    time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
ab@2053: 		               (adapter->tx_timeout_factor * HZ)) &&
ab@2053: 		    !(er32(STATUS) & E1000_STATUS_TXOFF)) {
ab@2053: 
ab@2053: 			/* detected Tx unit hang */
ab@2053: 			DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
ab@2053: 					"  Tx Queue             <%lu>\n"
ab@2053: 					"  TDH                  <%x>\n"
ab@2053: 					"  TDT                  <%x>\n"
ab@2053: 					"  next_to_use          <%x>\n"
ab@2053: 					"  next_to_clean        <%x>\n"
ab@2053: 					"buffer_info[next_to_clean]\n"
ab@2053: 					"  time_stamp           <%lx>\n"
ab@2053: 					"  next_to_watch        <%x>\n"
ab@2053: 					"  jiffies              <%lx>\n"
ab@2053: 					"  next_to_watch.status <%x>\n",
ab@2053: 				(unsigned long)((tx_ring - adapter->tx_ring) /
ab@2053: 					sizeof(struct e1000_tx_ring)),
ab@2053: 				readl(hw->hw_addr + tx_ring->tdh),
ab@2053: 				readl(hw->hw_addr + tx_ring->tdt),
ab@2053: 				tx_ring->next_to_use,
ab@2053: 				tx_ring->next_to_clean,
ab@2053: 				tx_ring->buffer_info[eop].time_stamp,
ab@2053: 				eop,
ab@2053: 				jiffies,
ab@2053: 				eop_desc->upper.fields.status);
ab@2053: 			netif_stop_queue(netdev);
ab@2053: 		}
ab@2053: 	}
ab@2053: 	adapter->total_tx_bytes += total_tx_bytes;
ab@2053: 	adapter->total_tx_packets += total_tx_packets;
ab@2053: 	netdev->stats.tx_bytes += total_tx_bytes;
ab@2053: 	netdev->stats.tx_packets += total_tx_packets;
ab@2053: 	return (count < tx_ring->count);
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_rx_checksum - Receive Checksum Offload for 82543
ab@2053:  * @adapter:     board private structure
ab@2053:  * @status_err:  receive descriptor status and error fields
ab@2053:  * @csum:        receive descriptor csum field
ab@2053:  * @sk_buff:     socket buffer with received data
ab@2053:  **/
ab@2053: 
ab@2053: static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
ab@2053: 			      u32 csum, struct sk_buff *skb)
ab@2053: {
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	u16 status = (u16)status_err;
ab@2053: 	u8 errors = (u8)(status_err >> 24);
ab@2053: 	skb->ip_summed = CHECKSUM_NONE;
ab@2053: 
ab@2053: 	/* 82543 or newer only */
ab@2053: 	if (unlikely(hw->mac_type < e1000_82543)) return;
ab@2053: 	/* Ignore Checksum bit is set */
ab@2053: 	if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
ab@2053: 	/* TCP/UDP checksum error bit is set */
ab@2053: 	if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
ab@2053: 		/* let the stack verify checksum errors */
ab@2053: 		adapter->hw_csum_err++;
ab@2053: 		return;
ab@2053: 	}
ab@2053: 	/* TCP/UDP Checksum has not been calculated */
ab@2053: 	if (!(status & E1000_RXD_STAT_TCPCS))
ab@2053: 		return;
ab@2053: 
ab@2053: 	/* It must be a TCP or UDP packet with a valid checksum */
ab@2053: 	if (likely(status & E1000_RXD_STAT_TCPCS)) {
ab@2053: 		/* TCP checksum is good */
ab@2053: 		skb->ip_summed = CHECKSUM_UNNECESSARY;
ab@2053: 	}
ab@2053: 	adapter->hw_csum_good++;
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_consume_page - helper function
ab@2053:  **/
ab@2053: static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb,
ab@2053:                                u16 length)
ab@2053: {
ab@2053: 	bi->page = NULL;
ab@2053: 	skb->len += length;
ab@2053: 	skb->data_len += length;
ab@2053: 	skb->truesize += length;
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_receive_skb - helper function to handle rx indications
ab@2053:  * @adapter: board private structure
ab@2053:  * @status: descriptor status field as written by hardware
ab@2053:  * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
ab@2053:  * @skb: pointer to sk_buff to be indicated to stack
ab@2053:  */
ab@2053: static void e1000_receive_skb(struct e1000_adapter *adapter, u8 status,
ab@2053: 			      __le16 vlan, struct sk_buff *skb)
ab@2053: {
ab@2053: 	if (unlikely(adapter->vlgrp && (status & E1000_RXD_STAT_VP))) {
ab@2053: 		vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
ab@2053: 		                         le16_to_cpu(vlan) &
ab@2053: 		                         E1000_RXD_SPC_VLAN_MASK);
ab@2053: 	} else {
ab@2053: 		netif_receive_skb(skb);
ab@2053: 	}
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
ab@2053:  * @adapter: board private structure
ab@2053:  * @rx_ring: ring to clean
ab@2053:  * @work_done: amount of napi work completed this call
ab@2053:  * @work_to_do: max amount of work allowed for this call to do
ab@2053:  *
ab@2053:  * the return value indicates whether actual cleaning was done, there
ab@2053:  * is no guarantee that everything was cleaned
ab@2053:  */
ab@2053: static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
ab@2053: 				     struct e1000_rx_ring *rx_ring,
ab@2053: 				     int *work_done, int work_to_do)
ab@2053: {
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	struct net_device *netdev = adapter->netdev;
ab@2053: 	struct pci_dev *pdev = adapter->pdev;
ab@2053: 	struct e1000_rx_desc *rx_desc, *next_rxd;
ab@2053: 	struct e1000_buffer *buffer_info, *next_buffer;
ab@2053: 	unsigned long irq_flags;
ab@2053: 	u32 length;
ab@2053: 	unsigned int i;
ab@2053: 	int cleaned_count = 0;
ab@2053: 	bool cleaned = false;
ab@2053: 	unsigned int total_rx_bytes=0, total_rx_packets=0;
ab@2053: 
ab@2053: 	i = rx_ring->next_to_clean;
ab@2053: 	rx_desc = E1000_RX_DESC(*rx_ring, i);
ab@2053: 	buffer_info = &rx_ring->buffer_info[i];
ab@2053: 
ab@2053: 	while (rx_desc->status & E1000_RXD_STAT_DD) {
ab@2053: 		struct sk_buff *skb;
ab@2053: 		u8 status;
ab@2053: 
ab@2053: 		if (*work_done >= work_to_do)
ab@2053: 			break;
ab@2053: 		(*work_done)++;
ab@2053: 
ab@2053: 		status = rx_desc->status;
ab@2053: 		skb = buffer_info->skb;
ab@2053: 		if (!adapter->ecdev) buffer_info->skb = NULL;
ab@2053: 
ab@2053: 		if (++i == rx_ring->count) i = 0;
ab@2053: 		next_rxd = E1000_RX_DESC(*rx_ring, i);
ab@2053: 		prefetch(next_rxd);
ab@2053: 
ab@2053: 		next_buffer = &rx_ring->buffer_info[i];
ab@2053: 
ab@2053: 		cleaned = true;
ab@2053: 		cleaned_count++;
ab@2053: 		pci_unmap_page(pdev, buffer_info->dma, buffer_info->length,
ab@2053: 		               PCI_DMA_FROMDEVICE);
ab@2053: 		buffer_info->dma = 0;
ab@2053: 
ab@2053: 		length = le16_to_cpu(rx_desc->length);
ab@2053: 
ab@2053: 		/* errors is only valid for DD + EOP descriptors */
ab@2053: 		if (!adapter->ecdev &&
ab@2053: 		    unlikely((status & E1000_RXD_STAT_EOP) &&
ab@2053: 		    (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK))) {
ab@2053: 			u8 last_byte = *(skb->data + length - 1);
ab@2053: 			if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
ab@2053: 				       last_byte)) {
ab@2053: 				spin_lock_irqsave(&adapter->stats_lock,
ab@2053: 				                  irq_flags);
ab@2053: 				e1000_tbi_adjust_stats(hw, &adapter->stats,
ab@2053: 				                       length, skb->data);
ab@2053: 				spin_unlock_irqrestore(&adapter->stats_lock,
ab@2053: 				                       irq_flags);
ab@2053: 				length--;
ab@2053: 			} else {
ab@2053: 				/* recycle both page and skb */
ab@2053: 				buffer_info->skb = skb;
ab@2053: 				/* an error means any chain goes out the window
ab@2053: 				 * too */
ab@2053: 				if (rx_ring->rx_skb_top)
ab@2053: 					dev_kfree_skb(rx_ring->rx_skb_top);
ab@2053: 				rx_ring->rx_skb_top = NULL;
ab@2053: 				goto next_desc;
ab@2053: 			}
ab@2053: 		}
ab@2053: 
ab@2053: #define rxtop rx_ring->rx_skb_top
ab@2053: 		if (!(status & E1000_RXD_STAT_EOP)) {
ab@2053: 			/* this descriptor is only the beginning (or middle) */
ab@2053: 			if (!rxtop) {
ab@2053: 				/* this is the beginning of a chain */
ab@2053: 				rxtop = skb;
ab@2053: 				skb_fill_page_desc(rxtop, 0, buffer_info->page,
ab@2053: 				                   0, length);
ab@2053: 			} else {
ab@2053: 				/* this is the middle of a chain */
ab@2053: 				skb_fill_page_desc(rxtop,
ab@2053: 				    skb_shinfo(rxtop)->nr_frags,
ab@2053: 				    buffer_info->page, 0, length);
ab@2053: 				/* re-use the skb, only consumed the page */
ab@2053: 				buffer_info->skb = skb;
ab@2053: 			}
ab@2053: 			e1000_consume_page(buffer_info, rxtop, length);
ab@2053: 			goto next_desc;
ab@2053: 		} else {
ab@2053: 			if (rxtop) {
ab@2053: 				/* end of the chain */
ab@2053: 				skb_fill_page_desc(rxtop,
ab@2053: 				    skb_shinfo(rxtop)->nr_frags,
ab@2053: 				    buffer_info->page, 0, length);
ab@2053: 				/* re-use the current skb, we only consumed the
ab@2053: 				 * page */
ab@2053: 				buffer_info->skb = skb;
ab@2053: 				skb = rxtop;
ab@2053: 				rxtop = NULL;
ab@2053: 				e1000_consume_page(buffer_info, skb, length);
ab@2053: 			} else {
ab@2053: 				/* no chain, got EOP, this buf is the packet
ab@2053: 				 * copybreak to save the put_page/alloc_page */
ab@2053: 				if (length <= copybreak &&
ab@2053: 				    skb_tailroom(skb) >= length) {
ab@2053: 					u8 *vaddr;
ab@2053: 					vaddr = kmap_atomic(buffer_info->page,
ab@2053: 					                    KM_SKB_DATA_SOFTIRQ);
ab@2053: 					memcpy(skb_tail_pointer(skb), vaddr, length);
ab@2053: 					kunmap_atomic(vaddr,
ab@2053: 					              KM_SKB_DATA_SOFTIRQ);
ab@2053: 					/* re-use the page, so don't erase
ab@2053: 					 * buffer_info->page */
ab@2053: 					skb_put(skb, length);
ab@2053: 				} else {
ab@2053: 					skb_fill_page_desc(skb, 0,
ab@2053: 					                   buffer_info->page, 0,
ab@2053: 				                           length);
ab@2053: 					e1000_consume_page(buffer_info, skb,
ab@2053: 					                   length);
ab@2053: 				}
ab@2053: 			}
ab@2053: 		}
ab@2053: 
ab@2053: 		/* Receive Checksum Offload XXX recompute due to CRC strip? */
ab@2053: 		e1000_rx_checksum(adapter,
ab@2053: 		                  (u32)(status) |
ab@2053: 		                  ((u32)(rx_desc->errors) << 24),
ab@2053: 		                  le16_to_cpu(rx_desc->csum), skb);
ab@2053: 
ab@2053: 		pskb_trim(skb, skb->len - 4);
ab@2053: 
ab@2053: 		/* probably a little skewed due to removing CRC */
ab@2053: 		total_rx_bytes += skb->len;
ab@2053: 		total_rx_packets++;
ab@2053: 
ab@2053: 		/* eth type trans needs skb->data to point to something */
ab@2053: 		if (!pskb_may_pull(skb, ETH_HLEN)) {
ab@2053: 			DPRINTK(DRV, ERR, "pskb_may_pull failed.\n");
ab@2053: 			if (!adapter->ecdev) dev_kfree_skb(skb);
ab@2053: 			goto next_desc;
ab@2053: 		}
ab@2053: 
ab@2053: 		if (adapter->ecdev) {
ab@2053: 			ecdev_receive(adapter->ecdev, skb->data, length);
ab@2053: 
ab@2053: 			// No need to detect link status as
ab@2053: 			// long as frames are received: Reset watchdog.
ab@2053: 			adapter->ec_watchdog_jiffies = jiffies;
ab@2053: 		} else {
ab@2053: 			skb->protocol = eth_type_trans(skb, netdev);
ab@2053: 			e1000_receive_skb(adapter, status, rx_desc->special, skb);
ab@2053: 		}
ab@2053: next_desc:
ab@2053: 		rx_desc->status = 0;
ab@2053: 
ab@2053: 		/* return some buffers to hardware, one at a time is too slow */
ab@2053: 		if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
ab@2053: 			adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
ab@2053: 			cleaned_count = 0;
ab@2053: 		}
ab@2053: 
ab@2053: 		/* use prefetched values */
ab@2053: 		rx_desc = next_rxd;
ab@2053: 		buffer_info = next_buffer;
ab@2053: 	}
ab@2053: 	rx_ring->next_to_clean = i;
ab@2053: 
ab@2053: 	cleaned_count = E1000_DESC_UNUSED(rx_ring);
ab@2053: 	if (cleaned_count)
ab@2053: 		adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
ab@2053: 
ab@2053: 	adapter->total_rx_packets += total_rx_packets;
ab@2053: 	adapter->total_rx_bytes += total_rx_bytes;
ab@2053: 	netdev->stats.rx_bytes += total_rx_bytes;
ab@2053: 	netdev->stats.rx_packets += total_rx_packets;
ab@2053: 	return cleaned;
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_clean_rx_irq - Send received data up the network stack; legacy
ab@2053:  * @adapter: board private structure
ab@2053:  * @rx_ring: ring to clean
ab@2053:  * @work_done: amount of napi work completed this call
ab@2053:  * @work_to_do: max amount of work allowed for this call to do
ab@2053:  */
ab@2053: static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
ab@2053: 			       struct e1000_rx_ring *rx_ring,
ab@2053: 			       int *work_done, int work_to_do)
ab@2053: {
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	struct net_device *netdev = adapter->netdev;
ab@2053: 	struct pci_dev *pdev = adapter->pdev;
ab@2053: 	struct e1000_rx_desc *rx_desc, *next_rxd;
ab@2053: 	struct e1000_buffer *buffer_info, *next_buffer;
ab@2053: 	unsigned long flags;
ab@2053: 	u32 length;
ab@2053: 	unsigned int i;
ab@2053: 	int cleaned_count = 0;
ab@2053: 	bool cleaned = false;
ab@2053: 	unsigned int total_rx_bytes=0, total_rx_packets=0;
ab@2053: 
ab@2053: 	i = rx_ring->next_to_clean;
ab@2053: 	rx_desc = E1000_RX_DESC(*rx_ring, i);
ab@2053: 	buffer_info = &rx_ring->buffer_info[i];
ab@2053: 
ab@2053: 	while (rx_desc->status & E1000_RXD_STAT_DD) {
ab@2053: 		struct sk_buff *skb;
ab@2053: 		u8 status;
ab@2053: 
ab@2053: 		if (*work_done >= work_to_do)
ab@2053: 			break;
ab@2053: 		(*work_done)++;
ab@2053: 
ab@2053: 		status = rx_desc->status;
ab@2053: 		skb = buffer_info->skb;
ab@2053: 		if (!adapter->ecdev) buffer_info->skb = NULL;
ab@2053: 
ab@2053: 		prefetch(skb->data - NET_IP_ALIGN);
ab@2053: 
ab@2053: 		if (++i == rx_ring->count) i = 0;
ab@2053: 		next_rxd = E1000_RX_DESC(*rx_ring, i);
ab@2053: 		prefetch(next_rxd);
ab@2053: 
ab@2053: 		next_buffer = &rx_ring->buffer_info[i];
ab@2053: 
ab@2053: 		cleaned = true;
ab@2053: 		cleaned_count++;
ab@2053: 		pci_unmap_single(pdev, buffer_info->dma, buffer_info->length,
ab@2053: 		                 PCI_DMA_FROMDEVICE);
ab@2053: 		buffer_info->dma = 0;
ab@2053: 
ab@2053: 		length = le16_to_cpu(rx_desc->length);
ab@2053: 		/* !EOP means multiple descriptors were used to store a single
ab@2053: 		 * packet, if thats the case we need to toss it.  In fact, we
ab@2053: 		 * to toss every packet with the EOP bit clear and the next
ab@2053: 		 * frame that _does_ have the EOP bit set, as it is by
ab@2053: 		 * definition only a frame fragment
ab@2053: 		 */
ab@2053: 		if (unlikely(!(status & E1000_RXD_STAT_EOP)))
ab@2053: 			adapter->discarding = true;
ab@2053: 
ab@2053: 		if (adapter->discarding) {
ab@2053: 			/* All receives must fit into a single buffer */
ab@2053: 			E1000_DBG("%s: Receive packet consumed multiple"
ab@2053: 				  " buffers\n", netdev->name);
ab@2053: 			/* recycle */
ab@2053: 			buffer_info->skb = skb;
ab@2053: 			if (status & E1000_RXD_STAT_EOP)
ab@2053: 				adapter->discarding = false;
ab@2053: 			goto next_desc;
ab@2053: 		}
ab@2053: 
ab@2053: 		if (!adapter->ecdev &&
ab@2053: 		    unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
ab@2053: 			u8 last_byte = *(skb->data + length - 1);
ab@2053: 			if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
ab@2053: 				       last_byte)) {
ab@2053: 				spin_lock_irqsave(&adapter->stats_lock, flags);
ab@2053: 				e1000_tbi_adjust_stats(hw, &adapter->stats,
ab@2053: 				                       length, skb->data);
ab@2053: 				spin_unlock_irqrestore(&adapter->stats_lock,
ab@2053: 				                       flags);
ab@2053: 				length--;
ab@2053: 			} else {
ab@2053: 				/* recycle */
ab@2053: 				buffer_info->skb = skb;
ab@2053: 				goto next_desc;
ab@2053: 			}
ab@2053: 		}
ab@2053: 
ab@2053: 		/* adjust length to remove Ethernet CRC, this must be
ab@2053: 		 * done after the TBI_ACCEPT workaround above */
ab@2053: 		length -= 4;
ab@2053: 
ab@2053: 		/* probably a little skewed due to removing CRC */
ab@2053: 		total_rx_bytes += length;
ab@2053: 		total_rx_packets++;
ab@2053: 
ab@2053: 		/* code added for copybreak, this should improve
ab@2053: 		 * performance for small packets with large amounts
ab@2053: 		 * of reassembly being done in the stack */
ab@2053: 		if (!adapter->ecdev && length < copybreak) {
ab@2053: 			struct sk_buff *new_skb =
ab@2053: 			    netdev_alloc_skb_ip_align(netdev, length);
ab@2053: 			if (new_skb) {
ab@2053: 				skb_copy_to_linear_data_offset(new_skb,
ab@2053: 							       -NET_IP_ALIGN,
ab@2053: 							       (skb->data -
ab@2053: 							        NET_IP_ALIGN),
ab@2053: 							       (length +
ab@2053: 							        NET_IP_ALIGN));
ab@2053: 				/* save the skb in buffer_info as good */
ab@2053: 				buffer_info->skb = skb;
ab@2053: 				skb = new_skb;
ab@2053: 			}
ab@2053: 			/* else just continue with the old one */
ab@2053: 		}
ab@2053: 		/* end copybreak code */
ab@2053: 		skb_put(skb, length);
ab@2053: 
ab@2053: 		/* Receive Checksum Offload */
ab@2053: 		e1000_rx_checksum(adapter,
ab@2053: 				  (u32)(status) |
ab@2053: 				  ((u32)(rx_desc->errors) << 24),
ab@2053: 				  le16_to_cpu(rx_desc->csum), skb);
ab@2053: 
ab@2053: 		if (adapter->ecdev) {
ab@2053: 			ecdev_receive(adapter->ecdev, skb->data, length);
ab@2053: 
ab@2053: 			// No need to detect link status as
ab@2053: 			// long as frames are received: Reset watchdog.
ab@2053: 			adapter->ec_watchdog_jiffies = jiffies;
ab@2053: 		} else {
ab@2053: 			skb->protocol = eth_type_trans(skb, netdev);
ab@2053: 			e1000_receive_skb(adapter, status, rx_desc->special, skb);
ab@2053: 		}
ab@2053: 
ab@2053: next_desc:
ab@2053: 		rx_desc->status = 0;
ab@2053: 
ab@2053: 		/* return some buffers to hardware, one at a time is too slow */
ab@2053: 		if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
ab@2053: 			adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
ab@2053: 			cleaned_count = 0;
ab@2053: 		}
ab@2053: 
ab@2053: 		/* use prefetched values */
ab@2053: 		rx_desc = next_rxd;
ab@2053: 		buffer_info = next_buffer;
ab@2053: 	}
ab@2053: 	rx_ring->next_to_clean = i;
ab@2053: 
ab@2053: 	cleaned_count = E1000_DESC_UNUSED(rx_ring);
ab@2053: 	if (cleaned_count)
ab@2053: 		adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
ab@2053: 
ab@2053: 	adapter->total_rx_packets += total_rx_packets;
ab@2053: 	adapter->total_rx_bytes += total_rx_bytes;
ab@2053: 	netdev->stats.rx_bytes += total_rx_bytes;
ab@2053: 	netdev->stats.rx_packets += total_rx_packets;
ab@2053: 	return cleaned;
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
ab@2053:  * @adapter: address of board private structure
ab@2053:  * @rx_ring: pointer to receive ring structure
ab@2053:  * @cleaned_count: number of buffers to allocate this pass
ab@2053:  **/
ab@2053: 
ab@2053: static void
ab@2053: e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
ab@2053:                              struct e1000_rx_ring *rx_ring, int cleaned_count)
ab@2053: {
ab@2053: 	struct net_device *netdev = adapter->netdev;
ab@2053: 	struct pci_dev *pdev = adapter->pdev;
ab@2053: 	struct e1000_rx_desc *rx_desc;
ab@2053: 	struct e1000_buffer *buffer_info;
ab@2053: 	struct sk_buff *skb;
ab@2053: 	unsigned int i;
ab@2053: 	unsigned int bufsz = 256 - 16 /*for skb_reserve */ ;
ab@2053: 
ab@2053: 	i = rx_ring->next_to_use;
ab@2053: 	buffer_info = &rx_ring->buffer_info[i];
ab@2053: 
ab@2053: 	while (cleaned_count--) {
ab@2053: 		skb = buffer_info->skb;
ab@2053: 		if (skb) {
ab@2053: 			skb_trim(skb, 0);
ab@2053: 			goto check_page;
ab@2053: 		}
ab@2053: 
ab@2053: 		skb = netdev_alloc_skb_ip_align(netdev, bufsz);
ab@2053: 		if (unlikely(!skb)) {
ab@2053: 			/* Better luck next round */
ab@2053: 			adapter->alloc_rx_buff_failed++;
ab@2053: 			break;
ab@2053: 		}
ab@2053: 
ab@2053: 		/* Fix for errata 23, can't cross 64kB boundary */
ab@2053: 		if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
ab@2053: 			struct sk_buff *oldskb = skb;
ab@2053: 			DPRINTK(PROBE, ERR, "skb align check failed: %u bytes "
ab@2053: 					     "at %p\n", bufsz, skb->data);
ab@2053: 			/* Try again, without freeing the previous */
ab@2053: 			skb = netdev_alloc_skb_ip_align(netdev, bufsz);
ab@2053: 			/* Failed allocation, critical failure */
ab@2053: 			if (!skb) {
ab@2053: 				dev_kfree_skb(oldskb);
ab@2053: 				adapter->alloc_rx_buff_failed++;
ab@2053: 				break;
ab@2053: 			}
ab@2053: 
ab@2053: 			if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
ab@2053: 				/* give up */
ab@2053: 				dev_kfree_skb(skb);
ab@2053: 				dev_kfree_skb(oldskb);
ab@2053: 				break; /* while (cleaned_count--) */
ab@2053: 			}
ab@2053: 
ab@2053: 			/* Use new allocation */
ab@2053: 			dev_kfree_skb(oldskb);
ab@2053: 		}
ab@2053: 		buffer_info->skb = skb;
ab@2053: 		buffer_info->length = adapter->rx_buffer_len;
ab@2053: check_page:
ab@2053: 		/* allocate a new page if necessary */
ab@2053: 		if (!buffer_info->page) {
ab@2053: 			buffer_info->page = alloc_page(GFP_ATOMIC);
ab@2053: 			if (unlikely(!buffer_info->page)) {
ab@2053: 				adapter->alloc_rx_buff_failed++;
ab@2053: 				break;
ab@2053: 			}
ab@2053: 		}
ab@2053: 
ab@2053: 		if (!buffer_info->dma) {
ab@2053: 			buffer_info->dma = pci_map_page(pdev,
ab@2053: 			                                buffer_info->page, 0,
ab@2053: 			                                buffer_info->length,
ab@2053: 			                                PCI_DMA_FROMDEVICE);
ab@2053: 			if (pci_dma_mapping_error(pdev, buffer_info->dma)) {
ab@2053: 				put_page(buffer_info->page);
ab@2053: 				dev_kfree_skb(skb);
ab@2053: 				buffer_info->page = NULL;
ab@2053: 				buffer_info->skb = NULL;
ab@2053: 				buffer_info->dma = 0;
ab@2053: 				adapter->alloc_rx_buff_failed++;
ab@2053: 				break; /* while !buffer_info->skb */
ab@2053: 			}
ab@2053: 		}
ab@2053: 
ab@2053: 		rx_desc = E1000_RX_DESC(*rx_ring, i);
ab@2053: 		rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
ab@2053: 
ab@2053: 		if (unlikely(++i == rx_ring->count))
ab@2053: 			i = 0;
ab@2053: 		buffer_info = &rx_ring->buffer_info[i];
ab@2053: 	}
ab@2053: 
ab@2053: 	if (likely(rx_ring->next_to_use != i)) {
ab@2053: 		rx_ring->next_to_use = i;
ab@2053: 		if (unlikely(i-- == 0))
ab@2053: 			i = (rx_ring->count - 1);
ab@2053: 
ab@2053: 		/* Force memory writes to complete before letting h/w
ab@2053: 		 * know there are new descriptors to fetch.  (Only
ab@2053: 		 * applicable for weak-ordered memory model archs,
ab@2053: 		 * such as IA-64). */
ab@2053: 		wmb();
ab@2053: 		writel(i, adapter->hw.hw_addr + rx_ring->rdt);
ab@2053: 	}
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
ab@2053:  * @adapter: address of board private structure
ab@2053:  **/
ab@2053: 
ab@2053: static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
ab@2053: 				   struct e1000_rx_ring *rx_ring,
ab@2053: 				   int cleaned_count)
ab@2053: {
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	struct net_device *netdev = adapter->netdev;
ab@2053: 	struct pci_dev *pdev = adapter->pdev;
ab@2053: 	struct e1000_rx_desc *rx_desc;
ab@2053: 	struct e1000_buffer *buffer_info;
ab@2053: 	struct sk_buff *skb;
ab@2053: 	unsigned int i;
ab@2053: 	unsigned int bufsz = adapter->rx_buffer_len;
ab@2053: 
ab@2053: 	i = rx_ring->next_to_use;
ab@2053: 	buffer_info = &rx_ring->buffer_info[i];
ab@2053: 
ab@2053: 	while (cleaned_count--) {
ab@2053: 		skb = buffer_info->skb;
ab@2053: 		if (skb) {
ab@2053: 			skb_trim(skb, 0);
ab@2053: 			goto map_skb;
ab@2053: 		}
ab@2053: 
ab@2053: 		skb = netdev_alloc_skb_ip_align(netdev, bufsz);
ab@2053: 		if (unlikely(!skb)) {
ab@2053: 			/* Better luck next round */
ab@2053: 			adapter->alloc_rx_buff_failed++;
ab@2053: 			break;
ab@2053: 		}
ab@2053: 
ab@2053: 		/* Fix for errata 23, can't cross 64kB boundary */
ab@2053: 		if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
ab@2053: 			struct sk_buff *oldskb = skb;
ab@2053: 			DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
ab@2053: 					     "at %p\n", bufsz, skb->data);
ab@2053: 			/* Try again, without freeing the previous */
ab@2053: 			skb = netdev_alloc_skb_ip_align(netdev, bufsz);
ab@2053: 			/* Failed allocation, critical failure */
ab@2053: 			if (!skb) {
ab@2053: 				dev_kfree_skb(oldskb);
ab@2053: 				adapter->alloc_rx_buff_failed++;
ab@2053: 				break;
ab@2053: 			}
ab@2053: 
ab@2053: 			if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
ab@2053: 				/* give up */
ab@2053: 				dev_kfree_skb(skb);
ab@2053: 				dev_kfree_skb(oldskb);
ab@2053: 				adapter->alloc_rx_buff_failed++;
ab@2053: 				break; /* while !buffer_info->skb */
ab@2053: 			}
ab@2053: 
ab@2053: 			/* Use new allocation */
ab@2053: 			dev_kfree_skb(oldskb);
ab@2053: 		}
ab@2053: 		buffer_info->skb = skb;
ab@2053: 		buffer_info->length = adapter->rx_buffer_len;
ab@2053: map_skb:
ab@2053: 		buffer_info->dma = pci_map_single(pdev,
ab@2053: 						  skb->data,
ab@2053: 						  buffer_info->length,
ab@2053: 						  PCI_DMA_FROMDEVICE);
ab@2053: 		if (pci_dma_mapping_error(pdev, buffer_info->dma)) {
ab@2053: 			dev_kfree_skb(skb);
ab@2053: 			buffer_info->skb = NULL;
ab@2053: 			buffer_info->dma = 0;
ab@2053: 			adapter->alloc_rx_buff_failed++;
ab@2053: 			break; /* while !buffer_info->skb */
ab@2053: 		}
ab@2053: 
ab@2053: 		/*
ab@2053: 		 * XXX if it was allocated cleanly it will never map to a
ab@2053: 		 * boundary crossing
ab@2053: 		 */
ab@2053: 
ab@2053: 		/* Fix for errata 23, can't cross 64kB boundary */
ab@2053: 		if (!e1000_check_64k_bound(adapter,
ab@2053: 					(void *)(unsigned long)buffer_info->dma,
ab@2053: 					adapter->rx_buffer_len)) {
ab@2053: 			DPRINTK(RX_ERR, ERR,
ab@2053: 				"dma align check failed: %u bytes at %p\n",
ab@2053: 				adapter->rx_buffer_len,
ab@2053: 				(void *)(unsigned long)buffer_info->dma);
ab@2053: 			if (!adapter->ecdev) {
ab@2053: 				dev_kfree_skb(skb);
ab@2053: 				buffer_info->skb = NULL;
ab@2053: 			}
ab@2053: 
ab@2053: 			pci_unmap_single(pdev, buffer_info->dma,
ab@2053: 					 adapter->rx_buffer_len,
ab@2053: 					 PCI_DMA_FROMDEVICE);
ab@2053: 			buffer_info->dma = 0;
ab@2053: 
ab@2053: 			adapter->alloc_rx_buff_failed++;
ab@2053: 			break; /* while !buffer_info->skb */
ab@2053: 		}
ab@2053: 		rx_desc = E1000_RX_DESC(*rx_ring, i);
ab@2053: 		rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
ab@2053: 
ab@2053: 		if (unlikely(++i == rx_ring->count))
ab@2053: 			i = 0;
ab@2053: 		buffer_info = &rx_ring->buffer_info[i];
ab@2053: 	}
ab@2053: 
ab@2053: 	if (likely(rx_ring->next_to_use != i)) {
ab@2053: 		rx_ring->next_to_use = i;
ab@2053: 		if (unlikely(i-- == 0))
ab@2053: 			i = (rx_ring->count - 1);
ab@2053: 
ab@2053: 		/* Force memory writes to complete before letting h/w
ab@2053: 		 * know there are new descriptors to fetch.  (Only
ab@2053: 		 * applicable for weak-ordered memory model archs,
ab@2053: 		 * such as IA-64). */
ab@2053: 		wmb();
ab@2053: 		writel(i, hw->hw_addr + rx_ring->rdt);
ab@2053: 	}
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
ab@2053:  * @adapter:
ab@2053:  **/
ab@2053: 
ab@2053: static void e1000_smartspeed(struct e1000_adapter *adapter)
ab@2053: {
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	u16 phy_status;
ab@2053: 	u16 phy_ctrl;
ab@2053: 
ab@2053: 	if ((hw->phy_type != e1000_phy_igp) || !hw->autoneg ||
ab@2053: 	   !(hw->autoneg_advertised & ADVERTISE_1000_FULL))
ab@2053: 		return;
ab@2053: 
ab@2053: 	if (adapter->smartspeed == 0) {
ab@2053: 		/* If Master/Slave config fault is asserted twice,
ab@2053: 		 * we assume back-to-back */
ab@2053: 		e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
ab@2053: 		if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
ab@2053: 		e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
ab@2053: 		if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
ab@2053: 		e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
ab@2053: 		if (phy_ctrl & CR_1000T_MS_ENABLE) {
ab@2053: 			phy_ctrl &= ~CR_1000T_MS_ENABLE;
ab@2053: 			e1000_write_phy_reg(hw, PHY_1000T_CTRL,
ab@2053: 					    phy_ctrl);
ab@2053: 			adapter->smartspeed++;
ab@2053: 			if (!e1000_phy_setup_autoneg(hw) &&
ab@2053: 			   !e1000_read_phy_reg(hw, PHY_CTRL,
ab@2053: 				   	       &phy_ctrl)) {
ab@2053: 				phy_ctrl |= (MII_CR_AUTO_NEG_EN |
ab@2053: 					     MII_CR_RESTART_AUTO_NEG);
ab@2053: 				e1000_write_phy_reg(hw, PHY_CTRL,
ab@2053: 						    phy_ctrl);
ab@2053: 			}
ab@2053: 		}
ab@2053: 		return;
ab@2053: 	} else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
ab@2053: 		/* If still no link, perhaps using 2/3 pair cable */
ab@2053: 		e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
ab@2053: 		phy_ctrl |= CR_1000T_MS_ENABLE;
ab@2053: 		e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_ctrl);
ab@2053: 		if (!e1000_phy_setup_autoneg(hw) &&
ab@2053: 		   !e1000_read_phy_reg(hw, PHY_CTRL, &phy_ctrl)) {
ab@2053: 			phy_ctrl |= (MII_CR_AUTO_NEG_EN |
ab@2053: 				     MII_CR_RESTART_AUTO_NEG);
ab@2053: 			e1000_write_phy_reg(hw, PHY_CTRL, phy_ctrl);
ab@2053: 		}
ab@2053: 	}
ab@2053: 	/* Restart process after E1000_SMARTSPEED_MAX iterations */
ab@2053: 	if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
ab@2053: 		adapter->smartspeed = 0;
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_ioctl -
ab@2053:  * @netdev:
ab@2053:  * @ifreq:
ab@2053:  * @cmd:
ab@2053:  **/
ab@2053: 
ab@2053: static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
ab@2053: {
ab@2053: 	switch (cmd) {
ab@2053: 	case SIOCGMIIPHY:
ab@2053: 	case SIOCGMIIREG:
ab@2053: 	case SIOCSMIIREG:
ab@2053: 		return e1000_mii_ioctl(netdev, ifr, cmd);
ab@2053: 	default:
ab@2053: 		return -EOPNOTSUPP;
ab@2053: 	}
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_mii_ioctl -
ab@2053:  * @netdev:
ab@2053:  * @ifreq:
ab@2053:  * @cmd:
ab@2053:  **/
ab@2053: 
ab@2053: static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
ab@2053: 			   int cmd)
ab@2053: {
ab@2053: 	struct e1000_adapter *adapter = netdev_priv(netdev);
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	struct mii_ioctl_data *data = if_mii(ifr);
ab@2053: 	int retval;
ab@2053: 	u16 mii_reg;
ab@2053: 	u16 spddplx;
ab@2053: 	unsigned long flags;
ab@2053: 
ab@2053: 	if (hw->media_type != e1000_media_type_copper)
ab@2053: 		return -EOPNOTSUPP;
ab@2053: 
ab@2053: 	switch (cmd) {
ab@2053: 	case SIOCGMIIPHY:
ab@2053: 		data->phy_id = hw->phy_addr;
ab@2053: 		break;
ab@2053: 	case SIOCGMIIREG:
ab@2053: 		if (adapter->ecdev) return -EPERM;
ab@2053: 		spin_lock_irqsave(&adapter->stats_lock, flags);
ab@2053: 		if (e1000_read_phy_reg(hw, data->reg_num & 0x1F,
ab@2053: 				   &data->val_out)) {
ab@2053: 			spin_unlock_irqrestore(&adapter->stats_lock, flags);
ab@2053: 			return -EIO;
ab@2053: 		}
ab@2053: 		spin_unlock_irqrestore(&adapter->stats_lock, flags);
ab@2053: 		break;
ab@2053: 	case SIOCSMIIREG:
ab@2053: 		if (adapter->ecdev) return -EPERM;
ab@2053: 		if (data->reg_num & ~(0x1F))
ab@2053: 			return -EFAULT;
ab@2053: 		mii_reg = data->val_in;
ab@2053: 		spin_lock_irqsave(&adapter->stats_lock, flags);
ab@2053: 		if (e1000_write_phy_reg(hw, data->reg_num,
ab@2053: 					mii_reg)) {
ab@2053: 			spin_unlock_irqrestore(&adapter->stats_lock, flags);
ab@2053: 			return -EIO;
ab@2053: 		}
ab@2053: 		spin_unlock_irqrestore(&adapter->stats_lock, flags);
ab@2053: 		if (hw->media_type == e1000_media_type_copper) {
ab@2053: 			switch (data->reg_num) {
ab@2053: 			case PHY_CTRL:
ab@2053: 				if (mii_reg & MII_CR_POWER_DOWN)
ab@2053: 					break;
ab@2053: 				if (mii_reg & MII_CR_AUTO_NEG_EN) {
ab@2053: 					hw->autoneg = 1;
ab@2053: 					hw->autoneg_advertised = 0x2F;
ab@2053: 				} else {
ab@2053: 					if (mii_reg & 0x40)
ab@2053: 						spddplx = SPEED_1000;
ab@2053: 					else if (mii_reg & 0x2000)
ab@2053: 						spddplx = SPEED_100;
ab@2053: 					else
ab@2053: 						spddplx = SPEED_10;
ab@2053: 					spddplx += (mii_reg & 0x100)
ab@2053: 						   ? DUPLEX_FULL :
ab@2053: 						   DUPLEX_HALF;
ab@2053: 					retval = e1000_set_spd_dplx(adapter,
ab@2053: 								    spddplx);
ab@2053: 					if (retval)
ab@2053: 						return retval;
ab@2053: 				}
ab@2053: 				if (netif_running(adapter->netdev))
ab@2053: 					e1000_reinit_locked(adapter);
ab@2053: 				else
ab@2053: 					e1000_reset(adapter);
ab@2053: 				break;
ab@2053: 			case M88E1000_PHY_SPEC_CTRL:
ab@2053: 			case M88E1000_EXT_PHY_SPEC_CTRL:
ab@2053: 				if (e1000_phy_reset(hw))
ab@2053: 					return -EIO;
ab@2053: 				break;
ab@2053: 			}
ab@2053: 		} else {
ab@2053: 			switch (data->reg_num) {
ab@2053: 			case PHY_CTRL:
ab@2053: 				if (mii_reg & MII_CR_POWER_DOWN)
ab@2053: 					break;
ab@2053: 				if (netif_running(adapter->netdev))
ab@2053: 					e1000_reinit_locked(adapter);
ab@2053: 				else
ab@2053: 					e1000_reset(adapter);
ab@2053: 				break;
ab@2053: 			}
ab@2053: 		}
ab@2053: 		break;
ab@2053: 	default:
ab@2053: 		return -EOPNOTSUPP;
ab@2053: 	}
ab@2053: 	return E1000_SUCCESS;
ab@2053: }
ab@2053: 
ab@2053: void e1000_pci_set_mwi(struct e1000_hw *hw)
ab@2053: {
ab@2053: 	struct e1000_adapter *adapter = hw->back;
ab@2053: 	int ret_val = pci_set_mwi(adapter->pdev);
ab@2053: 
ab@2053: 	if (ret_val)
ab@2053: 		DPRINTK(PROBE, ERR, "Error in setting MWI\n");
ab@2053: }
ab@2053: 
ab@2053: void e1000_pci_clear_mwi(struct e1000_hw *hw)
ab@2053: {
ab@2053: 	struct e1000_adapter *adapter = hw->back;
ab@2053: 
ab@2053: 	pci_clear_mwi(adapter->pdev);
ab@2053: }
ab@2053: 
ab@2053: int e1000_pcix_get_mmrbc(struct e1000_hw *hw)
ab@2053: {
ab@2053: 	struct e1000_adapter *adapter = hw->back;
ab@2053: 	return pcix_get_mmrbc(adapter->pdev);
ab@2053: }
ab@2053: 
ab@2053: void e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc)
ab@2053: {
ab@2053: 	struct e1000_adapter *adapter = hw->back;
ab@2053: 	pcix_set_mmrbc(adapter->pdev, mmrbc);
ab@2053: }
ab@2053: 
ab@2053: void e1000_io_write(struct e1000_hw *hw, unsigned long port, u32 value)
ab@2053: {
ab@2053: 	outl(value, port);
ab@2053: }
ab@2053: 
ab@2053: static void e1000_vlan_rx_register(struct net_device *netdev,
ab@2053: 				   struct vlan_group *grp)
ab@2053: {
ab@2053: 	struct e1000_adapter *adapter = netdev_priv(netdev);
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	u32 ctrl, rctl;
ab@2053: 
ab@2053: 	if (!test_bit(__E1000_DOWN, &adapter->flags))
ab@2053: 		e1000_irq_disable(adapter);
ab@2053: 	adapter->vlgrp = grp;
ab@2053: 
ab@2053: 	if (grp) {
ab@2053: 		/* enable VLAN tag insert/strip */
ab@2053: 		ctrl = er32(CTRL);
ab@2053: 		ctrl |= E1000_CTRL_VME;
ab@2053: 		ew32(CTRL, ctrl);
ab@2053: 
ab@2053: 		/* enable VLAN receive filtering */
ab@2053: 		rctl = er32(RCTL);
ab@2053: 		rctl &= ~E1000_RCTL_CFIEN;
ab@2053: 		if (!(netdev->flags & IFF_PROMISC))
ab@2053: 			rctl |= E1000_RCTL_VFE;
ab@2053: 		ew32(RCTL, rctl);
ab@2053: 		e1000_update_mng_vlan(adapter);
ab@2053: 	} else {
ab@2053: 		/* disable VLAN tag insert/strip */
ab@2053: 		ctrl = er32(CTRL);
ab@2053: 		ctrl &= ~E1000_CTRL_VME;
ab@2053: 		ew32(CTRL, ctrl);
ab@2053: 
ab@2053: 		/* disable VLAN receive filtering */
ab@2053: 		rctl = er32(RCTL);
ab@2053: 		rctl &= ~E1000_RCTL_VFE;
ab@2053: 		ew32(RCTL, rctl);
ab@2053: 
ab@2053: 		if (adapter->mng_vlan_id != (u16)E1000_MNG_VLAN_NONE) {
ab@2053: 			e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
ab@2053: 			adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
ab@2053: 		}
ab@2053: 	}
ab@2053: 
ab@2053: 	if (!test_bit(__E1000_DOWN, &adapter->flags))
ab@2053: 		e1000_irq_enable(adapter);
ab@2053: }
ab@2053: 
ab@2053: static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
ab@2053: {
ab@2053: 	struct e1000_adapter *adapter = netdev_priv(netdev);
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	u32 vfta, index;
ab@2053: 
ab@2053: 	if ((hw->mng_cookie.status &
ab@2053: 	     E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
ab@2053: 	    (vid == adapter->mng_vlan_id))
ab@2053: 		return;
ab@2053: 	/* add VID to filter table */
ab@2053: 	index = (vid >> 5) & 0x7F;
ab@2053: 	vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
ab@2053: 	vfta |= (1 << (vid & 0x1F));
ab@2053: 	e1000_write_vfta(hw, index, vfta);
ab@2053: }
ab@2053: 
ab@2053: static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
ab@2053: {
ab@2053: 	struct e1000_adapter *adapter = netdev_priv(netdev);
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	u32 vfta, index;
ab@2053: 
ab@2053: 	if (!test_bit(__E1000_DOWN, &adapter->flags))
ab@2053: 		e1000_irq_disable(adapter);
ab@2053: 	vlan_group_set_device(adapter->vlgrp, vid, NULL);
ab@2053: 	if (!test_bit(__E1000_DOWN, &adapter->flags))
ab@2053: 		e1000_irq_enable(adapter);
ab@2053: 
ab@2053: 	/* remove VID from filter table */
ab@2053: 	index = (vid >> 5) & 0x7F;
ab@2053: 	vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
ab@2053: 	vfta &= ~(1 << (vid & 0x1F));
ab@2053: 	e1000_write_vfta(hw, index, vfta);
ab@2053: }
ab@2053: 
ab@2053: static void e1000_restore_vlan(struct e1000_adapter *adapter)
ab@2053: {
ab@2053: 	e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
ab@2053: 
ab@2053: 	if (adapter->vlgrp) {
ab@2053: 		u16 vid;
ab@2053: 		for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
ab@2053: 			if (!vlan_group_get_device(adapter->vlgrp, vid))
ab@2053: 				continue;
ab@2053: 			e1000_vlan_rx_add_vid(adapter->netdev, vid);
ab@2053: 		}
ab@2053: 	}
ab@2053: }
ab@2053: 
ab@2053: int e1000_set_spd_dplx(struct e1000_adapter *adapter, u16 spddplx)
ab@2053: {
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 
ab@2053: 	hw->autoneg = 0;
ab@2053: 
ab@2053: 	/* Fiber NICs only allow 1000 gbps Full duplex */
ab@2053: 	if ((hw->media_type == e1000_media_type_fiber) &&
ab@2053: 		spddplx != (SPEED_1000 + DUPLEX_FULL)) {
ab@2053: 		DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
ab@2053: 		return -EINVAL;
ab@2053: 	}
ab@2053: 
ab@2053: 	switch (spddplx) {
ab@2053: 	case SPEED_10 + DUPLEX_HALF:
ab@2053: 		hw->forced_speed_duplex = e1000_10_half;
ab@2053: 		break;
ab@2053: 	case SPEED_10 + DUPLEX_FULL:
ab@2053: 		hw->forced_speed_duplex = e1000_10_full;
ab@2053: 		break;
ab@2053: 	case SPEED_100 + DUPLEX_HALF:
ab@2053: 		hw->forced_speed_duplex = e1000_100_half;
ab@2053: 		break;
ab@2053: 	case SPEED_100 + DUPLEX_FULL:
ab@2053: 		hw->forced_speed_duplex = e1000_100_full;
ab@2053: 		break;
ab@2053: 	case SPEED_1000 + DUPLEX_FULL:
ab@2053: 		hw->autoneg = 1;
ab@2053: 		hw->autoneg_advertised = ADVERTISE_1000_FULL;
ab@2053: 		break;
ab@2053: 	case SPEED_1000 + DUPLEX_HALF: /* not supported */
ab@2053: 	default:
ab@2053: 		DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
ab@2053: 		return -EINVAL;
ab@2053: 	}
ab@2053: 	return 0;
ab@2053: }
ab@2053: 
ab@2053: static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake)
ab@2053: {
ab@2053: 	struct net_device *netdev = pci_get_drvdata(pdev);
ab@2053: 	struct e1000_adapter *adapter = netdev_priv(netdev);
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	u32 ctrl, ctrl_ext, rctl, status;
ab@2053: 	u32 wufc = adapter->wol;
ab@2053: #ifdef CONFIG_PM
ab@2053: 	int retval = 0;
ab@2053: #endif
ab@2053: 
ab@2053: 	if (adapter->ecdev)
ab@2053: 		return -EBUSY;
ab@2053: 
ab@2053: 	netif_device_detach(netdev);
ab@2053: 
ab@2053: 	if (netif_running(netdev)) {
ab@2053: 		WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
ab@2053: 		e1000_down(adapter);
ab@2053: 	}
ab@2053: 
ab@2053: #ifdef CONFIG_PM
ab@2053: 	retval = pci_save_state(pdev);
ab@2053: 	if (retval)
ab@2053: 		return retval;
ab@2053: #endif
ab@2053: 
ab@2053: 	status = er32(STATUS);
ab@2053: 	if (status & E1000_STATUS_LU)
ab@2053: 		wufc &= ~E1000_WUFC_LNKC;
ab@2053: 
ab@2053: 	if (wufc) {
ab@2053: 		e1000_setup_rctl(adapter);
ab@2053: 		e1000_set_rx_mode(netdev);
ab@2053: 
ab@2053: 		/* turn on all-multi mode if wake on multicast is enabled */
ab@2053: 		if (wufc & E1000_WUFC_MC) {
ab@2053: 			rctl = er32(RCTL);
ab@2053: 			rctl |= E1000_RCTL_MPE;
ab@2053: 			ew32(RCTL, rctl);
ab@2053: 		}
ab@2053: 
ab@2053: 		if (hw->mac_type >= e1000_82540) {
ab@2053: 			ctrl = er32(CTRL);
ab@2053: 			/* advertise wake from D3Cold */
ab@2053: 			#define E1000_CTRL_ADVD3WUC 0x00100000
ab@2053: 			/* phy power management enable */
ab@2053: 			#define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
ab@2053: 			ctrl |= E1000_CTRL_ADVD3WUC |
ab@2053: 				E1000_CTRL_EN_PHY_PWR_MGMT;
ab@2053: 			ew32(CTRL, ctrl);
ab@2053: 		}
ab@2053: 
ab@2053: 		if (hw->media_type == e1000_media_type_fiber ||
ab@2053: 		    hw->media_type == e1000_media_type_internal_serdes) {
ab@2053: 			/* keep the laser running in D3 */
ab@2053: 			ctrl_ext = er32(CTRL_EXT);
ab@2053: 			ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
ab@2053: 			ew32(CTRL_EXT, ctrl_ext);
ab@2053: 		}
ab@2053: 
ab@2053: 		ew32(WUC, E1000_WUC_PME_EN);
ab@2053: 		ew32(WUFC, wufc);
ab@2053: 	} else {
ab@2053: 		ew32(WUC, 0);
ab@2053: 		ew32(WUFC, 0);
ab@2053: 	}
ab@2053: 
ab@2053: 	e1000_release_manageability(adapter);
ab@2053: 
ab@2053: 	*enable_wake = !!wufc;
ab@2053: 
ab@2053: 	/* make sure adapter isn't asleep if manageability is enabled */
ab@2053: 	if (adapter->en_mng_pt)
ab@2053: 		*enable_wake = true;
ab@2053: 
ab@2053: 	if (netif_running(netdev))
ab@2053: 		e1000_free_irq(adapter);
ab@2053: 
ab@2053: 	pci_disable_device(pdev);
ab@2053: 
ab@2053: 	return 0;
ab@2053: }
ab@2053: 
ab@2053: #ifdef CONFIG_PM
ab@2053: static int e1000_suspend(struct pci_dev *pdev, pm_message_t state)
ab@2053: {
ab@2053: 	int retval;
ab@2053: 	bool wake;
ab@2053: 
ab@2053: 	retval = __e1000_shutdown(pdev, &wake);
ab@2053: 	if (retval)
ab@2053: 		return retval;
ab@2053: 
ab@2053: 	if (wake) {
ab@2053: 		pci_prepare_to_sleep(pdev);
ab@2053: 	} else {
ab@2053: 		pci_wake_from_d3(pdev, false);
ab@2053: 		pci_set_power_state(pdev, PCI_D3hot);
ab@2053: 	}
ab@2053: 
ab@2053: 	return 0;
ab@2053: }
ab@2053: 
ab@2053: static int e1000_resume(struct pci_dev *pdev)
ab@2053: {
ab@2053: 	struct net_device *netdev = pci_get_drvdata(pdev);
ab@2053: 	struct e1000_adapter *adapter = netdev_priv(netdev);
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	u32 err;
ab@2053: 
ab@2053: 	if (adapter->ecdev)
ab@2053: 		return -EBUSY;
ab@2053: 
ab@2053: 	pci_set_power_state(pdev, PCI_D0);
ab@2053: 	pci_restore_state(pdev);
ab@2053: 
ab@2053: 	if (adapter->need_ioport)
ab@2053: 		err = pci_enable_device(pdev);
ab@2053: 	else
ab@2053: 		err = pci_enable_device_mem(pdev);
ab@2053: 	if (err) {
ab@2053: 		printk(KERN_ERR "e1000: Cannot enable PCI device from suspend\n");
ab@2053: 		return err;
ab@2053: 	}
ab@2053: 	pci_set_master(pdev);
ab@2053: 
ab@2053: 	pci_enable_wake(pdev, PCI_D3hot, 0);
ab@2053: 	pci_enable_wake(pdev, PCI_D3cold, 0);
ab@2053: 
ab@2053: 	if (netif_running(netdev)) {
ab@2053: 		err = e1000_request_irq(adapter);
ab@2053: 		if (err)
ab@2053: 			return err;
ab@2053: 	}
ab@2053: 
ab@2053: 	e1000_power_up_phy(adapter);
ab@2053: 	e1000_reset(adapter);
ab@2053: 	ew32(WUS, ~0);
ab@2053: 
ab@2053: 	e1000_init_manageability(adapter);
ab@2053: 
ab@2053: 	if (netif_running(netdev))
ab@2053: 		e1000_up(adapter);
ab@2053: 
ab@2053: 	if (!adapter->ecdev) netif_device_attach(netdev);
ab@2053: 
ab@2053: 	return 0;
ab@2053: }
ab@2053: #endif
ab@2053: 
ab@2053: static void e1000_shutdown(struct pci_dev *pdev)
ab@2053: {
ab@2053: 	bool wake;
ab@2053: 
ab@2053: 	__e1000_shutdown(pdev, &wake);
ab@2053: 
ab@2053: 	if (system_state == SYSTEM_POWER_OFF) {
ab@2053: 		pci_wake_from_d3(pdev, wake);
ab@2053: 		pci_set_power_state(pdev, PCI_D3hot);
ab@2053: 	}
ab@2053: }
ab@2053: 
ab@2053: #ifdef CONFIG_NET_POLL_CONTROLLER
ab@2053: /*
ab@2053:  * Polling 'interrupt' - used by things like netconsole to send skbs
ab@2053:  * without having to re-enable interrupts. It's not called while
ab@2053:  * the interrupt routine is executing.
ab@2053:  */
ab@2053: static void e1000_netpoll(struct net_device *netdev)
ab@2053: {
ab@2053: 	struct e1000_adapter *adapter = netdev_priv(netdev);
ab@2053: 
ab@2053: 	disable_irq(adapter->pdev->irq);
ab@2053: 	e1000_intr(adapter->pdev->irq, netdev);
ab@2053: 	enable_irq(adapter->pdev->irq);
ab@2053: }
ab@2053: #endif
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_io_error_detected - called when PCI error is detected
ab@2053:  * @pdev: Pointer to PCI device
ab@2053:  * @state: The current pci connection state
ab@2053:  *
ab@2053:  * This function is called after a PCI bus error affecting
ab@2053:  * this device has been detected.
ab@2053:  */
ab@2053: static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
ab@2053: 						pci_channel_state_t state)
ab@2053: {
ab@2053: 	struct net_device *netdev = pci_get_drvdata(pdev);
ab@2053: 	struct e1000_adapter *adapter = netdev_priv(netdev);
ab@2053: 
ab@2053: 	netif_device_detach(netdev);
ab@2053: 
ab@2053: 	if (state == pci_channel_io_perm_failure)
ab@2053: 		return PCI_ERS_RESULT_DISCONNECT;
ab@2053: 
ab@2053: 	if (netif_running(netdev))
ab@2053: 		e1000_down(adapter);
ab@2053: 	pci_disable_device(pdev);
ab@2053: 
ab@2053: 	/* Request a slot slot reset. */
ab@2053: 	return PCI_ERS_RESULT_NEED_RESET;
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_io_slot_reset - called after the pci bus has been reset.
ab@2053:  * @pdev: Pointer to PCI device
ab@2053:  *
ab@2053:  * Restart the card from scratch, as if from a cold-boot. Implementation
ab@2053:  * resembles the first-half of the e1000_resume routine.
ab@2053:  */
ab@2053: static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
ab@2053: {
ab@2053: 	struct net_device *netdev = pci_get_drvdata(pdev);
ab@2053: 	struct e1000_adapter *adapter = netdev_priv(netdev);
ab@2053: 	struct e1000_hw *hw = &adapter->hw;
ab@2053: 	int err;
ab@2053: 
ab@2053: 	if (adapter->need_ioport)
ab@2053: 		err = pci_enable_device(pdev);
ab@2053: 	else
ab@2053: 		err = pci_enable_device_mem(pdev);
ab@2053: 	if (err) {
ab@2053: 		printk(KERN_ERR "e1000: Cannot re-enable PCI device after reset.\n");
ab@2053: 		return PCI_ERS_RESULT_DISCONNECT;
ab@2053: 	}
ab@2053: 	pci_set_master(pdev);
ab@2053: 
ab@2053: 	pci_enable_wake(pdev, PCI_D3hot, 0);
ab@2053: 	pci_enable_wake(pdev, PCI_D3cold, 0);
ab@2053: 
ab@2053: 	e1000_reset(adapter);
ab@2053: 	ew32(WUS, ~0);
ab@2053: 
ab@2053: 	return PCI_ERS_RESULT_RECOVERED;
ab@2053: }
ab@2053: 
ab@2053: /**
ab@2053:  * e1000_io_resume - called when traffic can start flowing again.
ab@2053:  * @pdev: Pointer to PCI device
ab@2053:  *
ab@2053:  * This callback is called when the error recovery driver tells us that
ab@2053:  * its OK to resume normal operation. Implementation resembles the
ab@2053:  * second-half of the e1000_resume routine.
ab@2053:  */
ab@2053: static void e1000_io_resume(struct pci_dev *pdev)
ab@2053: {
ab@2053: 	struct net_device *netdev = pci_get_drvdata(pdev);
ab@2053: 	struct e1000_adapter *adapter = netdev_priv(netdev);
ab@2053: 
ab@2053: 	e1000_init_manageability(adapter);
ab@2053: 
ab@2053: 	if (netif_running(netdev)) {
ab@2053: 		if (e1000_up(adapter)) {
ab@2053: 			printk("e1000: can't bring device back up after reset\n");
ab@2053: 			return;
ab@2053: 		}
ab@2053: 	}
ab@2053: 
ab@2053: 	netif_device_attach(netdev);
ab@2053: }
ab@2053: 
ab@2053: /* e1000_main.c */