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

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     3

  Intel PRO/1000 Linux driver

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  Copyright(c) 1999 - 2006 Intel Corporation.

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  This program is free software; you can redistribute it and/or modify it

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  under the terms and conditions of the GNU General Public License,

     8

  version 2, as published by the Free Software Foundation.

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  This program is distributed in the hope it will be useful, but WITHOUT

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  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

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  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for

    13

  more details.

    14

    15

  You should have received a copy of the GNU General Public License along with

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  this program; if not, write to the Free Software Foundation, Inc.,

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  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.

    18

    19

  The full GNU General Public License is included in this distribution in

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  the file called "COPYING".

    21

    22

  Contact Information:

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  Linux NICS <linux.nics@intel.com>

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  e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>

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  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497

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

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#include "e1000.h"

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#include <net/ip6_checksum.h>

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char e1000_driver_name[] = "e1000";

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static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";

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#define DRV_VERSION "7.3.21-k3-NAPI"

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const char e1000_driver_version[] = DRV_VERSION;

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static const char e1000_copyright[] = "Copyright (c) 1999-2006 Intel Corporation.";

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    38

/* e1000_pci_tbl - PCI Device ID Table

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 *

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 * Last entry must be all 0s

    41

 *

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 * Macro expands to...

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 *   {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}

    44

 */

    45

static struct pci_device_id e1000_pci_tbl[] = {

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	INTEL_E1000_ETHERNET_DEVICE(0x1000),

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	INTEL_E1000_ETHERNET_DEVICE(0x1001),

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	INTEL_E1000_ETHERNET_DEVICE(0x1004),

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	INTEL_E1000_ETHERNET_DEVICE(0x1008),

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	INTEL_E1000_ETHERNET_DEVICE(0x1009),

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	INTEL_E1000_ETHERNET_DEVICE(0x100C),

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	INTEL_E1000_ETHERNET_DEVICE(0x100D),

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	INTEL_E1000_ETHERNET_DEVICE(0x100E),

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	INTEL_E1000_ETHERNET_DEVICE(0x100F),

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	INTEL_E1000_ETHERNET_DEVICE(0x1010),

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	INTEL_E1000_ETHERNET_DEVICE(0x1011),

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	INTEL_E1000_ETHERNET_DEVICE(0x1012),

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	INTEL_E1000_ETHERNET_DEVICE(0x1013),

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	INTEL_E1000_ETHERNET_DEVICE(0x1014),

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	INTEL_E1000_ETHERNET_DEVICE(0x1015),

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	INTEL_E1000_ETHERNET_DEVICE(0x1016),

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	INTEL_E1000_ETHERNET_DEVICE(0x1017),

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	INTEL_E1000_ETHERNET_DEVICE(0x1018),

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	INTEL_E1000_ETHERNET_DEVICE(0x1019),

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	INTEL_E1000_ETHERNET_DEVICE(0x101A),

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	INTEL_E1000_ETHERNET_DEVICE(0x101D),

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	INTEL_E1000_ETHERNET_DEVICE(0x101E),

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	INTEL_E1000_ETHERNET_DEVICE(0x1026),

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	INTEL_E1000_ETHERNET_DEVICE(0x1027),

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	INTEL_E1000_ETHERNET_DEVICE(0x1028),

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	INTEL_E1000_ETHERNET_DEVICE(0x1075),

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	INTEL_E1000_ETHERNET_DEVICE(0x1076),

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	INTEL_E1000_ETHERNET_DEVICE(0x1077),

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	INTEL_E1000_ETHERNET_DEVICE(0x1078),

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	INTEL_E1000_ETHERNET_DEVICE(0x1079),

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	INTEL_E1000_ETHERNET_DEVICE(0x107A),

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	INTEL_E1000_ETHERNET_DEVICE(0x107B),

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	INTEL_E1000_ETHERNET_DEVICE(0x107C),

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	INTEL_E1000_ETHERNET_DEVICE(0x108A),

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	INTEL_E1000_ETHERNET_DEVICE(0x1099),

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	INTEL_E1000_ETHERNET_DEVICE(0x10B5),

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	/* required last entry */

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	{0,}

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};

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MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);

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int e1000_up(struct e1000_adapter *adapter);

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void e1000_down(struct e1000_adapter *adapter);

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void e1000_reinit_locked(struct e1000_adapter *adapter);

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void e1000_reset(struct e1000_adapter *adapter);

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int e1000_set_spd_dplx(struct e1000_adapter *adapter, u16 spddplx);

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int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);

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int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);

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void e1000_free_all_tx_resources(struct e1000_adapter *adapter);

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void e1000_free_all_rx_resources(struct e1000_adapter *adapter);

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static int e1000_setup_tx_resources(struct e1000_adapter *adapter,

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                             struct e1000_tx_ring *txdr);

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static int e1000_setup_rx_resources(struct e1000_adapter *adapter,

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                             struct e1000_rx_ring *rxdr);

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static void e1000_free_tx_resources(struct e1000_adapter *adapter,

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                             struct e1000_tx_ring *tx_ring);

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static void e1000_free_rx_resources(struct e1000_adapter *adapter,

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                             struct e1000_rx_ring *rx_ring);

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void e1000_update_stats(struct e1000_adapter *adapter);

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   107

static int e1000_init_module(void);

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static void e1000_exit_module(void);

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static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);

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static void __devexit e1000_remove(struct pci_dev *pdev);

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static int e1000_alloc_queues(struct e1000_adapter *adapter);

   112

static int e1000_sw_init(struct e1000_adapter *adapter);

   113

static int e1000_open(struct net_device *netdev);

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static int e1000_close(struct net_device *netdev);

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static void e1000_configure_tx(struct e1000_adapter *adapter);

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static void e1000_configure_rx(struct e1000_adapter *adapter);

   117

static void e1000_setup_rctl(struct e1000_adapter *adapter);

   118

static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);

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static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);

   120

static void e1000_clean_tx_ring(struct e1000_adapter *adapter,

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                                struct e1000_tx_ring *tx_ring);

   122

static void e1000_clean_rx_ring(struct e1000_adapter *adapter,

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                                struct e1000_rx_ring *rx_ring);

   124

static void e1000_set_rx_mode(struct net_device *netdev);

   125

static void e1000_update_phy_info(unsigned long data);

   126

static void e1000_watchdog(unsigned long data);

   127

static void e1000_82547_tx_fifo_stall(unsigned long data);

   128

static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev);

   129

static struct net_device_stats * e1000_get_stats(struct net_device *netdev);

   130

static int e1000_change_mtu(struct net_device *netdev, int new_mtu);

   131

static int e1000_set_mac(struct net_device *netdev, void *p);

   132

static irqreturn_t e1000_intr(int irq, void *data);

   133

static irqreturn_t e1000_intr_msi(int irq, void *data);

   134

static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,

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			       struct e1000_tx_ring *tx_ring);

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static int e1000_clean(struct napi_struct *napi, int budget);

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static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,

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			       struct e1000_rx_ring *rx_ring,

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			       int *work_done, int work_to_do);

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static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,

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                                   struct e1000_rx_ring *rx_ring,

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				   int cleaned_count);

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static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);

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static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,

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			   int cmd);

   146

static void e1000_enter_82542_rst(struct e1000_adapter *adapter);

   147

static void e1000_leave_82542_rst(struct e1000_adapter *adapter);

   148

static void e1000_tx_timeout(struct net_device *dev);

   149

static void e1000_reset_task(struct work_struct *work);

   150

static void e1000_smartspeed(struct e1000_adapter *adapter);

   151

static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,

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                                       struct sk_buff *skb);

   153

   154

static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);

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static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid);

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static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid);

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static void e1000_restore_vlan(struct e1000_adapter *adapter);

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   159

static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);

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#ifdef CONFIG_PM

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static int e1000_resume(struct pci_dev *pdev);

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#endif

   163

static void e1000_shutdown(struct pci_dev *pdev);

   164

   165

#ifdef CONFIG_NET_POLL_CONTROLLER

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/* for netdump / net console */

   167

static void e1000_netpoll (struct net_device *netdev);

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#endif

   169

   170

#define COPYBREAK_DEFAULT 256

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static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT;

   172

module_param(copybreak, uint, 0644);

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MODULE_PARM_DESC(copybreak,

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	"Maximum size of packet that is copied to a new buffer on receive");

   175

   176

static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,

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                     pci_channel_state_t state);

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static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);

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static void e1000_io_resume(struct pci_dev *pdev);

   180

   181

static struct pci_error_handlers e1000_err_handler = {

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	.error_detected = e1000_io_error_detected,

   183

	.slot_reset = e1000_io_slot_reset,

   184

	.resume = e1000_io_resume,

   185

};

   186

   187

static struct pci_driver e1000_driver = {

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	.name     = e1000_driver_name,

   189

	.id_table = e1000_pci_tbl,

   190

	.probe    = e1000_probe,

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	.remove   = __devexit_p(e1000_remove),

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#ifdef CONFIG_PM

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	/* Power Managment Hooks */

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	.suspend  = e1000_suspend,

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	.resume   = e1000_resume,

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#endif

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	.shutdown = e1000_shutdown,

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	.err_handler = &e1000_err_handler

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};

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   201

MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");

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MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");

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MODULE_LICENSE("GPL");

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MODULE_VERSION(DRV_VERSION);

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   206

static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;

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module_param(debug, int, 0);

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MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");

   209

   210

/**

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 * e1000_init_module - Driver Registration Routine

   212

 *

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 * e1000_init_module is the first routine called when the driver is

   214

 * loaded. All it does is register with the PCI subsystem.

   215

 **/

   216

   217

static int __init e1000_init_module(void)

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{

   219

	int ret;

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	printk(KERN_INFO "%s - version %s\n",

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	       e1000_driver_string, e1000_driver_version);

   222

   223

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

   224

   225

	ret = pci_register_driver(&e1000_driver);

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	if (copybreak != COPYBREAK_DEFAULT) {

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		if (copybreak == 0)

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			printk(KERN_INFO "e1000: copybreak disabled\n");

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		else

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			printk(KERN_INFO "e1000: copybreak enabled for "

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			       "packets <= %u bytes\n", copybreak);

   232

	}

   233

	return ret;

   234

}

   235

   236

module_init(e1000_init_module);

   237

   238

/**

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 * e1000_exit_module - Driver Exit Cleanup Routine

   240

 *

   241

 * e1000_exit_module is called just before the driver is removed

   242

 * from memory.

   243

 **/

   244

   245

static void __exit e1000_exit_module(void)

   246

{

   247

	pci_unregister_driver(&e1000_driver);

   248

}

   249

   250

module_exit(e1000_exit_module);

   251

   252

static int e1000_request_irq(struct e1000_adapter *adapter)

   253

{

   254

	struct e1000_hw *hw = &adapter->hw;

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	struct net_device *netdev = adapter->netdev;

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	irq_handler_t handler = e1000_intr;

   257

	int irq_flags = IRQF_SHARED;

   258

	int err;

   259

   260

	if (hw->mac_type >= e1000_82571) {

   261

		adapter->have_msi = !pci_enable_msi(adapter->pdev);

   262

		if (adapter->have_msi) {

   263

			handler = e1000_intr_msi;

   264

			irq_flags = 0;

   265

		}

   266

	}

   267

   268

	err = request_irq(adapter->pdev->irq, handler, irq_flags, netdev->name,

   269

	                  netdev);

   270

	if (err) {

   271

		if (adapter->have_msi)

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			pci_disable_msi(adapter->pdev);

   273

		DPRINTK(PROBE, ERR,

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		        "Unable to allocate interrupt Error: %d\n", err);

   275

	}

   276

   277

	return err;

   278

}

   279

   280

static void e1000_free_irq(struct e1000_adapter *adapter)

   281

{

   282

	struct net_device *netdev = adapter->netdev;

   283

   284

	free_irq(adapter->pdev->irq, netdev);

   285

   286

	if (adapter->have_msi)

   287

		pci_disable_msi(adapter->pdev);

   288

}

   289

   290

/**

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 * e1000_irq_disable - Mask off interrupt generation on the NIC

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 * @adapter: board private structure

   293

 **/

   294

   295

static void e1000_irq_disable(struct e1000_adapter *adapter)

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{

   297

	struct e1000_hw *hw = &adapter->hw;

   298

   299

	ew32(IMC, ~0);

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	E1000_WRITE_FLUSH();

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	synchronize_irq(adapter->pdev->irq);

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}

   303

   304

/**

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 * e1000_irq_enable - Enable default interrupt generation settings

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 * @adapter: board private structure

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 **/

   308

   309

static void e1000_irq_enable(struct e1000_adapter *adapter)

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{

   311

	struct e1000_hw *hw = &adapter->hw;

   312

   313

	ew32(IMS, IMS_ENABLE_MASK);

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	E1000_WRITE_FLUSH();

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}

   316

   317

static void e1000_update_mng_vlan(struct e1000_adapter *adapter)

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{

   319

	struct e1000_hw *hw = &adapter->hw;

   320

	struct net_device *netdev = adapter->netdev;

   321

	u16 vid = hw->mng_cookie.vlan_id;

   322

	u16 old_vid = adapter->mng_vlan_id;

   323

	if (adapter->vlgrp) {

   324

		if (!vlan_group_get_device(adapter->vlgrp, vid)) {

   325

			if (hw->mng_cookie.status &

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				E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {

   327

				e1000_vlan_rx_add_vid(netdev, vid);

   328

				adapter->mng_vlan_id = vid;

   329

			} else

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				adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;

   331

   332

			if ((old_vid != (u16)E1000_MNG_VLAN_NONE) &&

   333

					(vid != old_vid) &&

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			    !vlan_group_get_device(adapter->vlgrp, old_vid))

   335

				e1000_vlan_rx_kill_vid(netdev, old_vid);

   336

		} else

   337

			adapter->mng_vlan_id = vid;

   338

	}

   339

}

   340

   341

/**

   342

 * e1000_release_hw_control - release control of the h/w to f/w

   343

 * @adapter: address of board private structure

   344

 *

   345

 * e1000_release_hw_control resets {CTRL_EXT|FWSM}:DRV_LOAD bit.

   346

 * For ASF and Pass Through versions of f/w this means that the

   347

 * driver is no longer loaded. For AMT version (only with 82573) i

   348

 * of the f/w this means that the network i/f is closed.

   349

 *

   350

 **/

   351

   352

static void e1000_release_hw_control(struct e1000_adapter *adapter)

   353

{

   354

	u32 ctrl_ext;

   355

	u32 swsm;

   356

	struct e1000_hw *hw = &adapter->hw;

   357

   358

	/* Let firmware taken over control of h/w */

   359

	switch (hw->mac_type) {

   360

	case e1000_82573:

   361

		swsm = er32(SWSM);

   362

		ew32(SWSM, swsm & ~E1000_SWSM_DRV_LOAD);

   363

		break;

   364

	case e1000_82571:

   365

	case e1000_82572:

   366

	case e1000_80003es2lan:

   367

	case e1000_ich8lan:

   368

		ctrl_ext = er32(CTRL_EXT);

   369

		ew32(CTRL_EXT, ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);

   370

		break;

   371

	default:

   372

		break;

   373

	}

   374

}

   375

   376

/**

   377

 * e1000_get_hw_control - get control of the h/w from f/w

   378

 * @adapter: address of board private structure

   379

 *

   380

 * e1000_get_hw_control sets {CTRL_EXT|FWSM}:DRV_LOAD bit.

   381

 * For ASF and Pass Through versions of f/w this means that

   382

 * the driver is loaded. For AMT version (only with 82573)

   383

 * of the f/w this means that the network i/f is open.

   384

 *

   385

 **/

   386

   387

static void e1000_get_hw_control(struct e1000_adapter *adapter)

   388

{

   389

	u32 ctrl_ext;

   390

	u32 swsm;

   391

	struct e1000_hw *hw = &adapter->hw;

   392

   393

	/* Let firmware know the driver has taken over */

   394

	switch (hw->mac_type) {

   395

	case e1000_82573:

   396

		swsm = er32(SWSM);

   397

		ew32(SWSM, swsm | E1000_SWSM_DRV_LOAD);

   398

		break;

   399

	case e1000_82571:

   400

	case e1000_82572:

   401

	case e1000_80003es2lan:

   402

	case e1000_ich8lan:

   403

		ctrl_ext = er32(CTRL_EXT);

   404

		ew32(CTRL_EXT, ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);

   405

		break;

   406

	default:

   407

		break;

   408

	}

   409

}

   410

   411

static void e1000_init_manageability(struct e1000_adapter *adapter)

   412

{

   413

	struct e1000_hw *hw = &adapter->hw;

   414

   415

	if (adapter->en_mng_pt) {

   416

		u32 manc = er32(MANC);

   417

   418

		/* disable hardware interception of ARP */

   419

		manc &= ~(E1000_MANC_ARP_EN);

   420

   421

		/* enable receiving management packets to the host */

   422

		/* this will probably generate destination unreachable messages

   423

		 * from the host OS, but the packets will be handled on SMBUS */

   424

		if (hw->has_manc2h) {

   425

			u32 manc2h = er32(MANC2H);

   426

   427

			manc |= E1000_MANC_EN_MNG2HOST;

   428

#define E1000_MNG2HOST_PORT_623 (1 << 5)

   429

#define E1000_MNG2HOST_PORT_664 (1 << 6)

   430

			manc2h |= E1000_MNG2HOST_PORT_623;

   431

			manc2h |= E1000_MNG2HOST_PORT_664;

   432

			ew32(MANC2H, manc2h);

   433

		}

   434

   435

		ew32(MANC, manc);

   436

	}

   437

}

   438

   439

static void e1000_release_manageability(struct e1000_adapter *adapter)

   440

{

   441

	struct e1000_hw *hw = &adapter->hw;

   442

   443

	if (adapter->en_mng_pt) {

   444

		u32 manc = er32(MANC);

   445

   446

		/* re-enable hardware interception of ARP */

   447

		manc |= E1000_MANC_ARP_EN;

   448

   449

		if (hw->has_manc2h)

   450

			manc &= ~E1000_MANC_EN_MNG2HOST;

   451

   452

		/* don't explicitly have to mess with MANC2H since

   453

		 * MANC has an enable disable that gates MANC2H */

   454

   455

		ew32(MANC, manc);

   456

	}

   457

}

   458

   459

/**

   460

 * e1000_configure - configure the hardware for RX and TX

   461

 * @adapter = private board structure

   462

 **/

   463

static void e1000_configure(struct e1000_adapter *adapter)

   464

{

   465

	struct net_device *netdev = adapter->netdev;

   466

	int i;

   467

   468

	e1000_set_rx_mode(netdev);

   469

   470

	e1000_restore_vlan(adapter);

   471

	e1000_init_manageability(adapter);

   472

   473

	e1000_configure_tx(adapter);

   474

	e1000_setup_rctl(adapter);

   475

	e1000_configure_rx(adapter);

   476

	/* call E1000_DESC_UNUSED which always leaves

   477

	 * at least 1 descriptor unused to make sure

   478

	 * next_to_use != next_to_clean */

   479

	for (i = 0; i < adapter->num_rx_queues; i++) {

   480

		struct e1000_rx_ring *ring = &adapter->rx_ring[i];

   481

		adapter->alloc_rx_buf(adapter, ring,

   482

		                      E1000_DESC_UNUSED(ring));

   483

	}

   484

   485

	adapter->tx_queue_len = netdev->tx_queue_len;

   486

}

   487

   488

int e1000_up(struct e1000_adapter *adapter)

   489

{

   490

	struct e1000_hw *hw = &adapter->hw;

   491

   492

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

   493

	e1000_configure(adapter);

   494

   495

	clear_bit(__E1000_DOWN, &adapter->flags);

   496

   497

	napi_enable(&adapter->napi);

   498

   499

	e1000_irq_enable(adapter);

   500

   501

	/* fire a link change interrupt to start the watchdog */

   502

	ew32(ICS, E1000_ICS_LSC);

   503

	return 0;

   504

}

   505

   506

/**

   507

 * e1000_power_up_phy - restore link in case the phy was powered down

   508

 * @adapter: address of board private structure

   509

 *

   510

 * The phy may be powered down to save power and turn off link when the

   511

 * driver is unloaded and wake on lan is not enabled (among others)

   512

 * *** this routine MUST be followed by a call to e1000_reset ***

   513

 *

   514

 **/

   515

   516

void e1000_power_up_phy(struct e1000_adapter *adapter)

   517

{

   518

	struct e1000_hw *hw = &adapter->hw;

   519

	u16 mii_reg = 0;

   520

   521

	/* Just clear the power down bit to wake the phy back up */

   522

	if (hw->media_type == e1000_media_type_copper) {

   523

		/* according to the manual, the phy will retain its

   524

		 * settings across a power-down/up cycle */

   525

		e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);

   526

		mii_reg &= ~MII_CR_POWER_DOWN;

   527

		e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);

   528

	}

   529

}

   530