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

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  Copyright(c) 1999 - 2006 Intel Corporation. All rights reserved.

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

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  under the terms of the GNU General Public License as published by the Free 

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  Software Foundation; either version 2 of the License, or (at your option) 

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  any later version.

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  This program is distributed in the hope that 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 

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  more details.

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  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., 59 

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  Temple Place - Suite 330, Boston, MA  02111-1307, USA.

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

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  file called LICENSE.

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  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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  vim: noexpandtab

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

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#include "e1000-2.6.18-ethercat.h"

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char e1000_driver_name[] = "ec_e1000";

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static char e1000_driver_string[] = "EtherCAT 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 "7.1.9-k4"DRIVERNAPI

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char e1000_driver_version[] = DRV_VERSION;

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

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    45

/* e1000_pci_tbl - PCI Device ID Table

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 *

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 * Last entry must be all 0s

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 *

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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(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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	/* required last entry */

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	{0,}

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};

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// do not auto-load driver

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// MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);

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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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   124

/* Local Function Prototypes */

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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);

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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);

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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);

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static void e1000_setup_rctl(struct e1000_adapter *adapter);

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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);

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static void e1000_clean_tx_ring(struct e1000_adapter *adapter,

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                                struct e1000_tx_ring *tx_ring);

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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);

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static void e1000_watchdog(unsigned long data);

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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);

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

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void ec_poll(struct net_device *);

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

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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

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static int e1000_clean(struct net_device *poll_dev, 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

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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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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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#endif

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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 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 net_device *dev);

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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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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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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

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static void e1000_shutdown(struct pci_dev *pdev);

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#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

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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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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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};

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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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	/* Power Managment Hooks */

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	.suspend  = e1000_suspend,

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#ifdef CONFIG_PM

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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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MODULE_AUTHOR("Florian Pose <fp@igh-essen.com>");

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MODULE_DESCRIPTION("EtherCAT-capable 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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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)");

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   236

/**

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 * e1000_init_module - Driver Registration Routine

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 *

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 * 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.

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 **/

   242

   243

static int __init

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e1000_init_module(void)

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{

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	int ret;

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

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	       e1000_driver_string, e1000_driver_version);

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   250

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

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   252

	ret = pci_module_init(&e1000_driver);

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   254

	return ret;

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}

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   257

module_init(e1000_init_module);

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   259

/**

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 * e1000_exit_module - Driver Exit Cleanup Routine

   261

 *

   262

 * e1000_exit_module is called just before the driver is removed

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 * from memory.

   264

 **/

   265

   266

static void __exit

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e1000_exit_module(void)

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{

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	pci_unregister_driver(&e1000_driver);

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}

   271

   272

module_exit(e1000_exit_module);

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static int e1000_request_irq(struct e1000_adapter *adapter) // not called when EtherCAT

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{

   276

	struct net_device *netdev = adapter->netdev;

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	int flags, err = 0;

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   279

	flags = IRQF_SHARED;

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#ifdef CONFIG_PCI_MSI

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	if (adapter->hw.mac_type > e1000_82547_rev_2) {

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		adapter->have_msi = TRUE;

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		if ((err = pci_enable_msi(adapter->pdev))) {

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			DPRINTK(PROBE, ERR,

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

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			adapter->have_msi = FALSE;

   287

		}

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	}

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	if (adapter->have_msi)

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		flags &= ~IRQF_SHARED;

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#endif

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	if ((err = request_irq(adapter->pdev->irq, &e1000_intr, flags,

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	                       netdev->name, netdev)))

   294

		DPRINTK(PROBE, ERR,

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

   296

   297

	return err;

   298

}

   299

   300

static void e1000_free_irq(struct e1000_adapter *adapter) // not called when EtherCAT

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{

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	struct net_device *netdev = adapter->netdev;

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   304

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

   305

   306

#ifdef CONFIG_PCI_MSI

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	if (adapter->have_msi)

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		pci_disable_msi(adapter->pdev);

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#endif

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}

   311

   312

/**

   313

 * e1000_irq_disable - Mask off interrupt generation on the NIC

   314

 * @adapter: board private structure

   315

 **/

   316

   317

static void

   318

e1000_irq_disable(struct e1000_adapter *adapter)

   319

{

   320

    if (adapter->ecdev)

   321

        return;

   322

	atomic_inc(&adapter->irq_sem);

   323

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

   324

	E1000_WRITE_FLUSH(&adapter->hw);

   325

	synchronize_irq(adapter->pdev->irq);

   326

}

   327

   328

/**

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 * e1000_irq_enable - Enable default interrupt generation settings

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 * @adapter: board private structure

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 **/

   332

   333

static void

   334

e1000_irq_enable(struct e1000_adapter *adapter)

   335

{

   336

    if (adapter->ecdev)

   337

        return;

   338

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

   339

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

   340

		E1000_WRITE_FLUSH(&adapter->hw);

   341

	}

   342

}

   343

   344

static void

   345

e1000_update_mng_vlan(struct e1000_adapter *adapter)

   346

{

   347

	struct net_device *netdev = adapter->netdev;

   348

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

   349

	uint16_t old_vid = adapter->mng_vlan_id;

   350

	if (adapter->vlgrp) {

   351

		if (!adapter->vlgrp->vlan_devices[vid]) {

   352

			if (adapter->hw.mng_cookie.status &

   353

				E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {

   354

				e1000_vlan_rx_add_vid(netdev, vid);

   355

				adapter->mng_vlan_id = vid;

   356

			} else

   357

				adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;

   358

   359

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

   360

					(vid != old_vid) &&

   361

					!adapter->vlgrp->vlan_devices[old_vid])

   362

				e1000_vlan_rx_kill_vid(netdev, old_vid);

   363

		} else

   364

			adapter->mng_vlan_id = vid;

   365

	}

   366

}

   367

   368

/**

   369

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

   370

 * @adapter: address of board private structure

   371

 *

   372

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

   373

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

   374

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

   375

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

   376

 *

   377

 **/

   378

   379

static void

   380

e1000_release_hw_control(struct e1000_adapter *adapter)

   381

{

   382

	uint32_t ctrl_ext;

   383

	uint32_t swsm;

   384

	uint32_t extcnf;

   385

   386

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

   387

	switch (adapter->hw.mac_type) {

   388

	case e1000_82571:

   389

	case e1000_82572:

   390

	case e1000_80003es2lan:

   391

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

   392

		E1000_WRITE_REG(&adapter->hw, CTRL_EXT,

   393

				ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);

   394

		break;

   395

	case e1000_82573:

   396

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

   397

		E1000_WRITE_REG(&adapter->hw, SWSM,

   398

				swsm & ~E1000_SWSM_DRV_LOAD);

   399

	case e1000_ich8lan:

   400

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

   401

		E1000_WRITE_REG(&adapter->hw, CTRL_EXT,

   402

				extcnf & ~E1000_CTRL_EXT_DRV_LOAD);

   403

		break;

   404

	default:

   405

		break;

   406

	}

   407

}

   408

   409

/**

   410

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

   411

 * @adapter: address of board private structure

   412

 *

   413

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

   414

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

   415

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

   416

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

   417

 *

   418

 **/

   419

   420

static void

   421

e1000_get_hw_control(struct e1000_adapter *adapter)

   422

{

   423

	uint32_t ctrl_ext;

   424

	uint32_t swsm;

   425

	uint32_t extcnf;

   426

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

   427

	switch (adapter->hw.mac_type) {

   428

	case e1000_82571:

   429

	case e1000_82572:

   430

	case e1000_80003es2lan:

   431

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

   432

		E1000_WRITE_REG(&adapter->hw, CTRL_EXT,

   433

				ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);

   434

		break;

   435

	case e1000_82573:

   436

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

   437

		E1000_WRITE_REG(&adapter->hw, SWSM,

   438

				swsm | E1000_SWSM_DRV_LOAD);

   439

		break;

   440

	case e1000_ich8lan:

   441

		extcnf = E1000_READ_REG(&adapter->hw, EXTCNF_CTRL);

   442

		E1000_WRITE_REG(&adapter->hw, EXTCNF_CTRL,

   443

				extcnf | E1000_EXTCNF_CTRL_SWFLAG);

   444

		break;

   445

	default:

   446

		break;

   447

	}

   448

}

   449

   450

int

   451

e1000_up(struct e1000_adapter *adapter)

   452

{

   453

	struct net_device *netdev = adapter->netdev;

   454

	int i;

   455

   456

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

   457

   458

	e1000_set_multi(netdev);

   459

   460

	e1000_restore_vlan(adapter);

   461

   462

	e1000_configure_tx(adapter);

   463

	e1000_setup_rctl(adapter);

   464

	e1000_configure_rx(adapter);

   465

	/* call E1000_DESC_UNUSED which always leaves

   466

	 * at least 1 descriptor unused to make sure

   467

	 * next_to_use != next_to_clean */

   468

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

   469

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

   470

		if (adapter->ecdev) {

   471

			/* fill rx ring completely! */

   472

			adapter->alloc_rx_buf(adapter, ring, ring->count);

   473

		} else {

   474

            /* this one leaves the last ring element unallocated! */

   475

			adapter->alloc_rx_buf(adapter, ring,

   476

					E1000_DESC_UNUSED(ring));

   477

		}

   478

	}

   479

   480

	adapter->tx_queue_len = netdev->tx_queue_len;

   481

   482

	if (!adapter->ecdev) {

   483

		mod_timer(&adapter->watchdog_timer, jiffies);

   484

   485

#ifdef CONFIG_E1000_NAPI

   486

        netif_poll_enable(netdev);

   487

#endif

   488

        e1000_irq_enable(adapter);

   489

    }

   490

   491

	return 0;

   492

}

   493

   494

/**

   495

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

   496

 * @adapter: address of board private structure

   497

 *

   498

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

   499

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

   500

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

   501

 *

   502

 **/

   503

   504

static void e1000_power_up_phy(struct e1000_adapter *adapter)

   505

{

   506

	uint16_t mii_reg = 0;

   507

   508

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

   509

	if (adapter->hw.media_type == e1000_media_type_copper) {

   510

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

   511

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

   512

		e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);

   513

		mii_reg &= ~MII_CR_POWER_DOWN;

   514

		e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);

   515

	}

   516

}

   517

   518

static void e1000_power_down_phy(struct e1000_adapter *adapter)

   519

{

   520

	boolean_t mng_mode_enabled = (adapter->hw.mac_type >= e1000_82571) &&

   521

	                              e1000_check_mng_mode(&adapter->hw);

   522

	/* Power down the PHY so no link is implied when interface is down

   523

	 * The PHY cannot be powered down if any of the following is TRUE

   524

	 * (a) WoL is enabled

   525

	 * (b) AMT is active

   526

	 * (c) SoL/IDER session is active */

   527

	if (!adapter->wol && adapter->hw.mac_type >= e1000_82540 &&