e1000_main.c

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/*******************************************************************************

  
  Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
  
  This program is free software; you can redistribute it and/or modify it 
  under the terms of the GNU General Public License as published by the Free 
  Software Foundation; either version 2 of the License, or (at your option) 
  any later version.
  
  This program is distributed in the hope that it will be useful, but WITHOUT 
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 
  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for 
  more details.
  
  You should have received a copy of the GNU General Public License along with
  this program; if not, write to the Free Software Foundation, Inc., 59 
  Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  
  The full GNU General Public License is included in this distribution in the
  file called LICENSE.
  
  Contact Information:
  Linux NICS <[e-mail]>
  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497

*******************************************************************************/

#include "e1000.h"

/* Change Log
 * 7.0.33      3-Feb-2006
 *   o Added another fix for the pass false carrier bit
 * 7.0.32      24-Jan-2006
 *   o Need to rebuild with noew version number for the pass false carrier 
 *     fix in e1000_hw.c
 * 7.0.30      18-Jan-2006
 *   o fixup for tso workaround to disable it for pci-x
 *   o fix mem leak on 82542
 *   o fixes for 10 Mb/s connections and incorrect stats
 * 7.0.28      01/06/2006
 *   o hardware workaround to only set "speed mode" bit for 1G link.
 * 7.0.26      12/23/2005
 *   o wake on lan support modified for device ID 10B5
 *   o fix dhcp + vlan issue not making it to the iAMT firmware
 * 7.0.24      12/9/2005
 *   o New hardware support for the Gigabit NIC embedded in the south bridge
 *   o Fixes to the recycling logic (skb->tail) from IBM LTC
 * 6.3.9	12/16/2005
 *   o incorporate fix for recycled skbs from IBM LTC
 * 6.3.7	11/18/2005
 *   o Honor eeprom setting for enabling/disabling Wake On Lan
 * 6.3.5 	11/17/2005
 *   o Fix memory leak in rx ring handling for PCI Express adapters
 * 6.3.4	11/8/05
 *   o Patch from Jesper Juhl to remove redundant NULL checks for kfree
 * 6.3.2	9/20/05
 *   o Render logic that sets/resets DRV_LOAD as inline functions to 
 *     avoid code replication. If f/w is AMT then set DRV_LOAD only when
 *     network interface is open.
 *   o Handle DRV_LOAD set/reset in cases where AMT uses VLANs.
 *   o Adjust PBA partioning for Jumbo frames using MTU size and not
 *     rx_buffer_len
 * 6.3.1	9/19/05
 *   o Use adapter->tx_timeout_factor in Tx Hung Detect logic 
 *      (e1000_clean_tx_irq)
 *   o Support for 8086:10B5 device (Quad Port)
 */

char e1000_driver_name[] = "e1000";
static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
#ifndef CONFIG_E1000_NAPI
#define DRIVERNAPI
#else
#define DRIVERNAPI "-NAPI"
#endif
#define DRV_VERSION "7.0.33-k2"DRIVERNAPI
char e1000_driver_version[] = DRV_VERSION;
static char e1000_copyright[] = "Copyright (c) 1999-2005 Intel Corporation.";

/* e1000_pci_tbl - PCI Device ID Table
 *
 * Last entry must be all 0s
 *
 * Macro expands to...
 *   {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
 */
static struct pci_device_id e1000_pci_tbl[] = {
	INTEL_E1000_ETHERNET_DEVICE(0x1000),
	INTEL_E1000_ETHERNET_DEVICE(0x1001),
	INTEL_E1000_ETHERNET_DEVICE(0x1004),
	INTEL_E1000_ETHERNET_DEVICE(0x1008),
	INTEL_E1000_ETHERNET_DEVICE(0x1009),
	INTEL_E1000_ETHERNET_DEVICE(0x100C),
	INTEL_E1000_ETHERNET_DEVICE(0x100D),
	INTEL_E1000_ETHERNET_DEVICE(0x100E),
	INTEL_E1000_ETHERNET_DEVICE(0x100F),
	INTEL_E1000_ETHERNET_DEVICE(0x1010),
	INTEL_E1000_ETHERNET_DEVICE(0x1011),
	INTEL_E1000_ETHERNET_DEVICE(0x1012),
	INTEL_E1000_ETHERNET_DEVICE(0x1013),
	INTEL_E1000_ETHERNET_DEVICE(0x1014),
	INTEL_E1000_ETHERNET_DEVICE(0x1015),
	INTEL_E1000_ETHERNET_DEVICE(0x1016),
	INTEL_E1000_ETHERNET_DEVICE(0x1017),
	INTEL_E1000_ETHERNET_DEVICE(0x1018),
	INTEL_E1000_ETHERNET_DEVICE(0x1019),
	INTEL_E1000_ETHERNET_DEVICE(0x101A),
	INTEL_E1000_ETHERNET_DEVICE(0x101D),
	INTEL_E1000_ETHERNET_DEVICE(0x101E),
	INTEL_E1000_ETHERNET_DEVICE(0x1026),
	INTEL_E1000_ETHERNET_DEVICE(0x1027),
	INTEL_E1000_ETHERNET_DEVICE(0x1028),
	INTEL_E1000_ETHERNET_DEVICE(0x105E),
	INTEL_E1000_ETHERNET_DEVICE(0x105F),
	INTEL_E1000_ETHERNET_DEVICE(0x1060),
	INTEL_E1000_ETHERNET_DEVICE(0x1075),
	INTEL_E1000_ETHERNET_DEVICE(0x1076),
	INTEL_E1000_ETHERNET_DEVICE(0x1077),
	INTEL_E1000_ETHERNET_DEVICE(0x1078),
	INTEL_E1000_ETHERNET_DEVICE(0x1079),
	INTEL_E1000_ETHERNET_DEVICE(0x107A),
	INTEL_E1000_ETHERNET_DEVICE(0x107B),
	INTEL_E1000_ETHERNET_DEVICE(0x107C),
	INTEL_E1000_ETHERNET_DEVICE(0x107D),
	INTEL_E1000_ETHERNET_DEVICE(0x107E),
	INTEL_E1000_ETHERNET_DEVICE(0x107F),
	INTEL_E1000_ETHERNET_DEVICE(0x108A),
	INTEL_E1000_ETHERNET_DEVICE(0x108B),
	INTEL_E1000_ETHERNET_DEVICE(0x108C),
	INTEL_E1000_ETHERNET_DEVICE(0x1096),
	INTEL_E1000_ETHERNET_DEVICE(0x1098),
	INTEL_E1000_ETHERNET_DEVICE(0x1099),
	INTEL_E1000_ETHERNET_DEVICE(0x109A),
	INTEL_E1000_ETHERNET_DEVICE(0x10B5),
	INTEL_E1000_ETHERNET_DEVICE(0x10B9),
	/* required last entry */
	{0,}
};

MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);

static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
                                    struct e1000_tx_ring *txdr);
static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
                                    struct e1000_rx_ring *rxdr);
static void e1000_free_tx_resources(struct e1000_adapter *adapter,
                                    struct e1000_tx_ring *tx_ring);
static void e1000_free_rx_resources(struct e1000_adapter *adapter,
                                    struct e1000_rx_ring *rx_ring);

/* Local Function Prototypes */

static int e1000_init_module(void);
static void e1000_exit_module(void);
static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
static void __devexit e1000_remove(struct pci_dev *pdev);
static int e1000_alloc_queues(struct e1000_adapter *adapter);
static int e1000_sw_init(struct e1000_adapter *adapter);
static int e1000_open(struct net_device *netdev);
static int e1000_close(struct net_device *netdev);
static void e1000_configure_tx(struct e1000_adapter *adapter);
static void e1000_configure_rx(struct e1000_adapter *adapter);
static void e1000_setup_rctl(struct e1000_adapter *adapter);
static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
                                struct e1000_tx_ring *tx_ring);
static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
                                struct e1000_rx_ring *rx_ring);
static void e1000_set_multi(struct net_device *netdev);
static void e1000_update_phy_info(unsigned long data);
static void e1000_watchdog(unsigned long data);
static void e1000_watchdog_task(struct e1000_adapter *adapter);
static void e1000_82547_tx_fifo_stall(unsigned long data);
static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
static int e1000_set_mac(struct net_device *netdev, void *p);
static irqreturn_t e1000_intr(int irq, void *data, struct pt_regs *regs);
static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter,
                                    struct e1000_tx_ring *tx_ring);
#ifdef CONFIG_E1000_NAPI
static int e1000_clean(struct net_device *poll_dev, int *budget);
static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
                                    struct e1000_rx_ring *rx_ring,
                                    int *work_done, int work_to_do);
static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
                                       struct e1000_rx_ring *rx_ring,
                                       int *work_done, int work_to_do);
#else
static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
                                    struct e1000_rx_ring *rx_ring);
static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
                                       struct e1000_rx_ring *rx_ring);
#endif
static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
                                   struct e1000_rx_ring *rx_ring,
				   int cleaned_count);
static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
                                      struct e1000_rx_ring *rx_ring,
				      int cleaned_count);
static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
			   int cmd);
static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
static void e1000_tx_timeout(struct net_device *dev);
static void e1000_reset_task(struct net_device *dev);
static void e1000_smartspeed(struct e1000_adapter *adapter);
static inline int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
					      struct sk_buff *skb);

static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
static void e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
static void e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
static void e1000_restore_vlan(struct e1000_adapter *adapter);

#ifdef CONFIG_PM
static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
static int e1000_resume(struct pci_dev *pdev);
#endif
static void e1000_shutdown(struct pci_dev *pdev);

#ifdef CONFIG_NET_POLL_CONTROLLER
/* for netdump / net console */
static void e1000_netpoll (struct net_device *netdev);
#endif


static struct pci_driver e1000_driver = {
	.name     = e1000_driver_name,
	.id_table = e1000_pci_tbl,
	.probe    = e1000_probe,
	.remove   = __devexit_p(e1000_remove),
	/* Power Managment Hooks */
#ifdef CONFIG_PM
	.suspend  = e1000_suspend,
	.resume   = e1000_resume,
#endif
	.shutdown = e1000_shutdown
};

MODULE_AUTHOR("Intel Corporation, <[e-mail]>");
MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);

static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
module_param(debug, int, 0);
MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");

/**
 * e1000_init_module - Driver Registration Routine
 *
 * e1000_init_module is the first routine called when the driver is
 * loaded. All it does is register with the PCI subsystem.
 **/

static int __init
e1000_init_module(void)
{
	int ret;
	printk(KERN_INFO "%s - version %s\n",
	       e1000_driver_string, e1000_driver_version);

	printk(KERN_INFO "%s\n", e1000_copyright);

	ret = pci_module_init(&e1000_driver);

	return ret;
}

module_init(e1000_init_module);

/**
 * e1000_exit_module - Driver Exit Cleanup Routine
 *
 * e1000_exit_module is called just before the driver is removed
 * from memory.
 **/

static void __exit
e1000_exit_module(void)
{
	pci_unregister_driver(&e1000_driver);
}

module_exit(e1000_exit_module);

/**
 * e1000_irq_disable - Mask off interrupt generation on the NIC
 * @adapter: board private structure
 **/

static inline void
e1000_irq_disable(struct e1000_adapter *adapter)
{
	atomic_inc(&adapter->irq_sem);
	E1000_WRITE_REG(&adapter->hw, IMC, ~0);
	E1000_WRITE_FLUSH(&adapter->hw);
	synchronize_irq(adapter->pdev->irq);
}

/**
 * e1000_irq_enable - Enable default interrupt generation settings
 * @adapter: board private structure
 **/

static inline void
e1000_irq_enable(struct e1000_adapter *adapter)
{
	if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
		E1000_WRITE_REG(&adapter->hw, IMS, IMS_ENABLE_MASK);
		E1000_WRITE_FLUSH(&adapter->hw);
	}
}

static void
e1000_update_mng_vlan(struct e1000_adapter *adapter)
{
	struct net_device *netdev = adapter->netdev;
	uint16_t vid = adapter->hw.mng_cookie.vlan_id;
	uint16_t old_vid = adapter->mng_vlan_id;
	if (adapter->vlgrp) {
		if (!adapter->vlgrp->vlan_devices[vid]) {
			if (adapter->hw.mng_cookie.status &
				E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
				e1000_vlan_rx_add_vid(netdev, vid);
				adapter->mng_vlan_id = vid;
			} else
				adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;

			if ((old_vid != (uint16_t)E1000_MNG_VLAN_NONE) &&
					(vid != old_vid) &&
					!adapter->vlgrp->vlan_devices[old_vid])
				e1000_vlan_rx_kill_vid(netdev, old_vid);
		} else
			adapter->mng_vlan_id = vid;
	}
}

/**
 * e1000_release_hw_control - release control of the h/w to f/w
 * @adapter: address of board private structure
 *
 * e1000_release_hw_control resets {CTRL_EXT|FWSM}:DRV_LOAD bit.
 * For ASF and Pass Through versions of f/w this means that the
 * driver is no longer loaded. For AMT version (only with 82573) i
 * of the f/w this means that the netowrk i/f is closed.
 * 
 **/

static inline void 
e1000_release_hw_control(struct e1000_adapter *adapter)
{
	uint32_t ctrl_ext;
	uint32_t swsm;

	/* Let firmware taken over control of h/w */
	switch (adapter->hw.mac_type) {
	case e1000_82571:
	case e1000_82572:
		ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
		E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
				ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
		break;
	case e1000_82573:
		swsm = E1000_READ_REG(&adapter->hw, SWSM);
		E1000_WRITE_REG(&adapter->hw, SWSM,
				swsm & ~E1000_SWSM_DRV_LOAD);
	default:
		break;
	}
}

/**
 * e1000_get_hw_control - get control of the h/w from f/w
 * @adapter: address of board private structure
 *
 * e1000_get_hw_control sets {CTRL_EXT|FWSM}:DRV_LOAD bit.
 * For ASF and Pass Through versions of f/w this means that 
 * the driver is loaded. For AMT version (only with 82573) 
 * of the f/w this means that the netowrk i/f is open.
 * 
 **/

static inline void 
e1000_get_hw_control(struct e1000_adapter *adapter)
{
	uint32_t ctrl_ext;
	uint32_t swsm;
	/* Let firmware know the driver has taken over */
	switch (adapter->hw.mac_type) {
	case e1000_82571:
	case e1000_82572:
		ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
		E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
				ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
		break;
	case e1000_82573:
		swsm = E1000_READ_REG(&adapter->hw, SWSM);
		E1000_WRITE_REG(&adapter->hw, SWSM,
				swsm | E1000_SWSM_DRV_LOAD);
		break;
	default:
		break;
	}
}

int
e1000_up(struct e1000_adapter *adapter)
{
	struct net_device *netdev = adapter->netdev;
	int i, err;

	/* hardware has been reset, we need to reload some things */

	/* Reset the PHY if it was previously powered down */
	if (adapter->hw.media_type == e1000_media_type_copper) {
		uint16_t mii_reg;
		e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
		if (mii_reg & MII_CR_POWER_DOWN)
			e1000_phy_reset(&adapter->hw);
	}

	e1000_set_multi(netdev);

	e1000_restore_vlan(adapter);

	e1000_configure_tx(adapter);
	e1000_setup_rctl(adapter);
	e1000_configure_rx(adapter);
	/* call E1000_DESC_UNUSED which always leaves
	 * at least 1 descriptor unused to make sure
	 * next_to_use != next_to_clean */
	for (i = 0; i < adapter->num_rx_queues; i++) {
		struct e1000_rx_ring *ring = &adapter->rx_ring[i];
		adapter->alloc_rx_buf(adapter, ring,
		                      E1000_DESC_UNUSED(ring));
	}

#ifdef CONFIG_PCI_MSI
	if (adapter->hw.mac_type > e1000_82547_rev_2) {
		adapter->have_msi = TRUE;
		if ((err = pci_enable_msi(adapter->pdev))) {
			DPRINTK(PROBE, ERR,
			 "Unable to allocate MSI interrupt Error: %d\n", err);
			adapter->have_msi = FALSE;
		}
	}
#endif
	if ((err = request_irq(adapter->pdev->irq, &e1000_intr,
		              SA_SHIRQ | SA_SAMPLE_RANDOM,
		              netdev->name, netdev))) {
		DPRINTK(PROBE, ERR,