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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.

     9

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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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#ifndef CONFIG_E1000_NAPI

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#define DRIVERNAPI

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#else

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#define DRIVERNAPI "-NAPI"

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#endif

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#define DRV_VERSION "7.3.20-k2"DRIVERNAPI

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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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    43

/* e1000_pci_tbl - PCI Device ID Table

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 *

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 * Last entry must be all 0s

    46

 *

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 * Macro expands to...

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 *   {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}

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 */

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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(0x1049),

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	INTEL_E1000_ETHERNET_DEVICE(0x104A),

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	INTEL_E1000_ETHERNET_DEVICE(0x104B),

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	INTEL_E1000_ETHERNET_DEVICE(0x104C),

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	INTEL_E1000_ETHERNET_DEVICE(0x104D),

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	INTEL_E1000_ETHERNET_DEVICE(0x105E),

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	INTEL_E1000_ETHERNET_DEVICE(0x105F),

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	INTEL_E1000_ETHERNET_DEVICE(0x1060),

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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(0x107D),

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	INTEL_E1000_ETHERNET_DEVICE(0x107E),

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	INTEL_E1000_ETHERNET_DEVICE(0x107F),

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	INTEL_E1000_ETHERNET_DEVICE(0x108A),

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	INTEL_E1000_ETHERNET_DEVICE(0x108B),

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	INTEL_E1000_ETHERNET_DEVICE(0x108C),

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	INTEL_E1000_ETHERNET_DEVICE(0x1096),

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	INTEL_E1000_ETHERNET_DEVICE(0x1098),

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	INTEL_E1000_ETHERNET_DEVICE(0x1099),

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	INTEL_E1000_ETHERNET_DEVICE(0x109A),

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	INTEL_E1000_ETHERNET_DEVICE(0x10A4),

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	INTEL_E1000_ETHERNET_DEVICE(0x10A5),

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	INTEL_E1000_ETHERNET_DEVICE(0x10B5),

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	INTEL_E1000_ETHERNET_DEVICE(0x10B9),

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	INTEL_E1000_ETHERNET_DEVICE(0x10BA),

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	INTEL_E1000_ETHERNET_DEVICE(0x10BB),

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	INTEL_E1000_ETHERNET_DEVICE(0x10BC),

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	INTEL_E1000_ETHERNET_DEVICE(0x10C4),

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	INTEL_E1000_ETHERNET_DEVICE(0x10C5),

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	INTEL_E1000_ETHERNET_DEVICE(0x10D5),

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	INTEL_E1000_ETHERNET_DEVICE(0x10D9),

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	INTEL_E1000_ETHERNET_DEVICE(0x10DA),

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	/* required last entry */

   115

	{0,}

   116

};

   117

   118

MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);

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   120

int e1000_up(struct e1000_adapter *adapter);

   121

void e1000_down(struct e1000_adapter *adapter);

   122

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, uint16_t 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);

   128

void e1000_free_all_rx_resources(struct e1000_adapter *adapter);

   129

static int e1000_setup_tx_resources(struct e1000_adapter *adapter,

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                             struct e1000_tx_ring *txdr);

   131

static int e1000_setup_rx_resources(struct e1000_adapter *adapter,

   132

                             struct e1000_rx_ring *rxdr);

   133

static void e1000_free_tx_resources(struct e1000_adapter *adapter,

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                             struct e1000_tx_ring *tx_ring);

   135

static void e1000_free_rx_resources(struct e1000_adapter *adapter,

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                             struct e1000_rx_ring *rx_ring);

   137

void e1000_update_stats(struct e1000_adapter *adapter);

   138

   139

static int e1000_init_module(void);

   140

static void e1000_exit_module(void);

   141

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);

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static int e1000_sw_init(struct e1000_adapter *adapter);

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static int e1000_open(struct net_device *netdev);

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static int e1000_close(struct net_device *netdev);

   147

static void e1000_configure_tx(struct e1000_adapter *adapter);

   148

static void e1000_configure_rx(struct e1000_adapter *adapter);

   149

static void e1000_setup_rctl(struct e1000_adapter *adapter);

   150

static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);

   151

static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);

   152

static void e1000_clean_tx_ring(struct e1000_adapter *adapter,

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                                struct e1000_tx_ring *tx_ring);

   154

static void e1000_clean_rx_ring(struct e1000_adapter *adapter,

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                                struct e1000_rx_ring *rx_ring);

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static void e1000_set_multi(struct net_device *netdev);

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static void e1000_update_phy_info(unsigned long data);

   158

static void e1000_watchdog(unsigned long data);

   159

static void e1000_82547_tx_fifo_stall(unsigned long data);

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

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

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

   163

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

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

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

   166

static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter,

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                                    struct e1000_tx_ring *tx_ring);

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#ifdef CONFIG_E1000_NAPI

   169

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

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static boolean_t 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 boolean_t e1000_clean_rx_irq_ps(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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#else

   177

static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,

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                                    struct e1000_rx_ring *rx_ring);

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static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,

   180

                                       struct e1000_rx_ring *rx_ring);

   181

#endif

   182

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 void e1000_alloc_rx_buffers_ps(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);

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static void e1000_enter_82542_rst(struct e1000_adapter *adapter);

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static void e1000_leave_82542_rst(struct e1000_adapter *adapter);

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static void e1000_tx_timeout(struct net_device *dev);

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static void e1000_reset_task(struct work_struct *work);

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static void e1000_smartspeed(struct e1000_adapter *adapter);

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static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,

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                                       struct sk_buff *skb);

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   199

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, uint16_t vid);

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static void e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);

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static void e1000_restore_vlan(struct e1000_adapter *adapter);

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   204

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

   208

static void e1000_shutdown(struct pci_dev *pdev);

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   210

#ifdef CONFIG_NET_POLL_CONTROLLER

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/* for netdump / net console */

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static void e1000_netpoll (struct net_device *netdev);

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#endif

   214

   215

#define COPYBREAK_DEFAULT 256

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static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT;

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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");

   220

   221

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);

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   226

static struct pci_error_handlers e1000_err_handler = {

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	.error_detected = e1000_io_error_detected,

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	.slot_reset = e1000_io_slot_reset,

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	.resume = e1000_io_resume,

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};

   231

   232

static struct pci_driver e1000_driver = {

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	.name     = e1000_driver_name,

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	.id_table = e1000_pci_tbl,

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	.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,

   241

#endif

   242

	.shutdown = e1000_shutdown,

   243

	.err_handler = &e1000_err_handler

   244

};

   245

   246

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

   247

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

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MODULE_LICENSE("GPL");

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MODULE_VERSION(DRV_VERSION);

   250

   251

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)");

   254

   255

/**

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 * e1000_init_module - Driver Registration Routine

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 *

   258

 * e1000_init_module is the first routine called when the driver is

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

   260

 **/

   261

   262

static int __init

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e1000_init_module(void)

   264

{

   265

	int ret;

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

   267

	       e1000_driver_string, e1000_driver_version);

   268

   269

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

   270

   271

	ret = pci_register_driver(&e1000_driver);

   272

	if (copybreak != COPYBREAK_DEFAULT) {

   273

		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);

   278

	}

   279

	return ret;

   280

}

   281

   282

module_init(e1000_init_module);

   283

   284

/**

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 * e1000_exit_module - Driver Exit Cleanup Routine

   286

 *

   287

 * e1000_exit_module is called just before the driver is removed

   288

 * from memory.

   289

 **/

   290

   291

static void __exit

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e1000_exit_module(void)

   293

{

   294

	pci_unregister_driver(&e1000_driver);

   295

}

   296

   297

module_exit(e1000_exit_module);

   298

   299

static int e1000_request_irq(struct e1000_adapter *adapter)

   300

{

   301

	struct net_device *netdev = adapter->netdev;

   302

	void (*handler) = &e1000_intr;

   303

	int irq_flags = IRQF_SHARED;

   304

	int err;

   305

   306

	if (adapter->hw.mac_type >= e1000_82571) {

   307

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

   308

		if (adapter->have_msi) {

   309

			handler = &e1000_intr_msi;

   310

			irq_flags = 0;

   311

		}

   312

	}

   313

   314

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

   315

	                  netdev);

   316

	if (err) {

   317

		if (adapter->have_msi)

   318

			pci_disable_msi(adapter->pdev);

   319

		DPRINTK(PROBE, ERR,

   320

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

   321

	}

   322

   323

	return err;

   324

}

   325

   326

static void e1000_free_irq(struct e1000_adapter *adapter)

   327

{

   328

	struct net_device *netdev = adapter->netdev;

   329

   330

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

   331

   332

	if (adapter->have_msi)

   333

		pci_disable_msi(adapter->pdev);

   334

}

   335

   336

/**

   337

 * e1000_irq_disable - Mask off interrupt generation on the NIC

   338

 * @adapter: board private structure

   339

 **/

   340

   341

static void

   342

e1000_irq_disable(struct e1000_adapter *adapter)

   343

{

   344

	atomic_inc(&adapter->irq_sem);

   345

	E1000_WRITE_REG(&adapter->hw, IMC, ~0);

   346

	E1000_WRITE_FLUSH(&adapter->hw);

   347

	synchronize_irq(adapter->pdev->irq);

   348

}

   349

   350

/**

   351

 * e1000_irq_enable - Enable default interrupt generation settings

   352

 * @adapter: board private structure

   353

 **/

   354

   355

static void

   356

e1000_irq_enable(struct e1000_adapter *adapter)

   357

{

   358

	if (likely(atomic_dec_and_test(&adapter->irq_sem))) {

   359

		E1000_WRITE_REG(&adapter->hw, IMS, IMS_ENABLE_MASK);

   360

		E1000_WRITE_FLUSH(&adapter->hw);

   361

	}

   362

}

   363

   364

static void

   365

e1000_update_mng_vlan(struct e1000_adapter *adapter)

   366

{

   367

	struct net_device *netdev = adapter->netdev;

   368

	uint16_t vid = adapter->hw.mng_cookie.vlan_id;

   369

	uint16_t old_vid = adapter->mng_vlan_id;

   370

	if (adapter->vlgrp) {

   371

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

   372

			if (adapter->hw.mng_cookie.status &

   373

				E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {

   374

				e1000_vlan_rx_add_vid(netdev, vid);

   375

				adapter->mng_vlan_id = vid;

   376

			} else

   377

				adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;

   378

   379

			if ((old_vid != (uint16_t)E1000_MNG_VLAN_NONE) &&

   380

					(vid != old_vid) &&

   381

			    !vlan_group_get_device(adapter->vlgrp, old_vid))

   382

				e1000_vlan_rx_kill_vid(netdev, old_vid);

   383

		} else

   384

			adapter->mng_vlan_id = vid;

   385

	}

   386

}

   387

   388

/**

   389

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

   390

 * @adapter: address of board private structure

   391

 *

   392

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

   393

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

   394

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

   395

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

   396

 *

   397

 **/

   398

   399

static void

   400

e1000_release_hw_control(struct e1000_adapter *adapter)

   401

{

   402

	uint32_t ctrl_ext;

   403

	uint32_t swsm;

   404

   405

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

   406

	switch (adapter->hw.mac_type) {

   407

	case e1000_82573:

   408

		swsm = E1000_READ_REG(&adapter->hw, SWSM);

   409

		E1000_WRITE_REG(&adapter->hw, SWSM,

   410

				swsm & ~E1000_SWSM_DRV_LOAD);

   411

		break;

   412

	case e1000_82571:

   413

	case e1000_82572:

   414

	case e1000_80003es2lan:

   415

	case e1000_ich8lan:

   416

		ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);

   417

		E1000_WRITE_REG(&adapter->hw, CTRL_EXT,

   418

				ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);

   419

		break;

   420

	default:

   421

		break;

   422

	}

   423

}

   424

   425

/**

   426

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

   427

 * @adapter: address of board private structure

   428

 *

   429

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

   430

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

   431

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

   432

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

   433

 *

   434

 **/

   435

   436

static void

   437

e1000_get_hw_control(struct e1000_adapter *adapter)

   438

{

   439

	uint32_t ctrl_ext;

   440

	uint32_t swsm;

   441

   442

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

   443

	switch (adapter->hw.mac_type) {

   444

	case e1000_82573:

   445

		swsm = E1000_READ_REG(&adapter->hw, SWSM);

   446

		E1000_WRITE_REG(&adapter->hw, SWSM,

   447

				swsm | E1000_SWSM_DRV_LOAD);

   448

		break;

   449

	case e1000_82571:

   450

	case e1000_82572:

   451

	case e1000_80003es2lan:

   452

	case e1000_ich8lan:

   453

		ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);

   454

		E1000_WRITE_REG(&adapter->hw, CTRL_EXT,

   455

				ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);

   456

		break;

   457

	default:

   458

		break;

   459

	}

   460

}

   461

   462

static void

   463

e1000_init_manageability(struct e1000_adapter *adapter)

   464

{

   465

	if (adapter->en_mng_pt) {

   466

		uint32_t manc = E1000_READ_REG(&adapter->hw, MANC);

   467

   468

		/* disable hardware interception of ARP */

   469

		manc &= ~(E1000_MANC_ARP_EN);

   470

   471

		/* enable receiving management packets to the host */

   472

		/* this will probably generate destination unreachable messages

   473

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

   474

		if (adapter->hw.has_manc2h) {

   475

			uint32_t manc2h = E1000_READ_REG(&adapter->hw, MANC2H);

   476

   477

			manc |= E1000_MANC_EN_MNG2HOST;

   478

#define E1000_MNG2HOST_PORT_623 (1 << 5)

   479

#define E1000_MNG2HOST_PORT_664 (1 << 6)

   480

			manc2h |= E1000_MNG2HOST_PORT_623;

   481

			manc2h |= E1000_MNG2HOST_PORT_664;

   482

			E1000_WRITE_REG(&adapter->hw, MANC2H, manc2h);

   483

		}

   484

   485

		E1000_WRITE_REG(&adapter->hw, MANC, manc);

   486

	}

   487

}

   488

   489

static void

   490

e1000_release_manageability(struct e1000_adapter *adapter)

   491

{

   492

	if (adapter->en_mng_pt) {

   493

		uint32_t manc = E1000_READ_REG(&adapter->hw, MANC);

   494

   495

		/* re-enable hardware interception of ARP */

   496

		manc |= E1000_MANC_ARP_EN;

   497

   498

		if (adapter->hw.has_manc2h)

   499

			manc &= ~E1000_MANC_EN_MNG2HOST;

   500

   501

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

   502

		 * MANC has an enable disable that gates MANC2H */

   503

   504

		E1000_WRITE_REG(&adapter->hw, MANC, manc);

   505

	}

   506

}

   507

   508

/**

   509

 * e1000_configure - configure the hardware for RX and TX

   510

 * @adapter = private board structure

   511

 **/

   512

static void e1000_configure(struct e1000_adapter *adapter)

   513

{

   514

	struct net_device *netdev = adapter->netdev;

   515

	int i;

   516

   517

	e1000_set_multi(netdev);

   518

   519

	e1000_restore_vlan(adapter);

   520

	e1000_init_manageability(adapter);

   521

   522

	e1000_configure_tx(adapter);

   523

	e1000_setup_rctl(adapter);

   524

	e1000_configure_rx(adapter);

   525

	/* call E1000_DESC_UNUSED which always leaves

   526

	 * at least 1 descriptor unused to make sure

   527

	 * next_to_use != next_to_clean */

   528

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

   529

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