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

  Intel PRO/1000 Linux driver
  Copyright(c) 1999 - 2006 Intel Corporation.

  This program is free software; you can redistribute it and/or modify it
  under the terms and conditions of the GNU General Public License,
  version 2, as published by the Free Software Foundation.

  This program is distributed in the hope it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  more details.

  You should have received a copy of the GNU General Public License along with
  this program; if not, write to the Free Software Foundation, Inc.,
  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.

  The full GNU General Public License is included in this distribution in
  the file called "COPYING".

  Contact Information:
  Linux NICS <linux.nics@intel.com>
  e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497

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


/* Linux PRO/1000 Ethernet Driver main header file */

#ifndef _E1000_H_
#define _E1000_H_

#include <linux/stddef.h>
#include <linux/module.h>
#include <linux/types.h>
#include <asm/byteorder.h>
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/pci.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/delay.h>
#include <linux/timer.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/interrupt.h>
#include <linux/string.h>
#include <linux/pagemap.h>
#include <linux/dma-mapping.h>
#include <linux/bitops.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <linux/capability.h>
#include <linux/in.h>
#include <linux/ip.h>
#include <linux/ipv6.h>
#include <linux/tcp.h>
#include <linux/udp.h>
#include <net/pkt_sched.h>
#include <linux/list.h>
#include <linux/reboot.h>
#include <net/checksum.h>
#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/if_vlan.h>

#define BAR_0		0
#define BAR_1		1
#define BAR_5		5

#define INTEL_E1000_ETHERNET_DEVICE(device_id) {\
	PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}

struct e1000_adapter;

#include "e1000_hw.h"

#ifdef DBG
#define E1000_DBG(args...) printk(KERN_DEBUG "e1000: " args)
#else
#define E1000_DBG(args...)
#endif

#define E1000_ERR(args...) printk(KERN_ERR "e1000: " args)

#define PFX "e1000: "
#define DPRINTK(nlevel, klevel, fmt, args...) \
	(void)((NETIF_MSG_##nlevel & adapter->msg_enable) && \
	printk(KERN_##klevel PFX "%s: %s: " fmt, adapter->netdev->name, \
		__FUNCTION__ , ## args))

#define E1000_MAX_INTR 10

/* TX/RX descriptor defines */
#define E1000_DEFAULT_TXD                  256
#define E1000_MAX_TXD                      256
#define E1000_MIN_TXD                       80
#define E1000_MAX_82544_TXD               4096

#define E1000_DEFAULT_RXD                  256
#define E1000_MAX_RXD                      256
#define E1000_MIN_RXD                       80
#define E1000_MAX_82544_RXD               4096

/* this is the size past which hardware will drop packets when setting LPE=0 */
#define MAXIMUM_ETHERNET_VLAN_SIZE 1522

/* Supported Rx Buffer Sizes */
#define E1000_RXBUFFER_128   128    /* Used for packet split */
#define E1000_RXBUFFER_256   256    /* Used for packet split */
#define E1000_RXBUFFER_512   512
#define E1000_RXBUFFER_1024  1024
#define E1000_RXBUFFER_2048  2048
#define E1000_RXBUFFER_4096  4096
#define E1000_RXBUFFER_8192  8192
#define E1000_RXBUFFER_16384 16384

/* SmartSpeed delimiters */
#define E1000_SMARTSPEED_DOWNSHIFT 3
#define E1000_SMARTSPEED_MAX       15

/* Packet Buffer allocations */
#define E1000_PBA_BYTES_SHIFT 0xA
#define E1000_TX_HEAD_ADDR_SHIFT 7
#define E1000_PBA_TX_MASK 0xFFFF0000

/* Flow Control Watermarks */
#define E1000_FC_HIGH_DIFF 0x1638  /* High: 5688 bytes below Rx FIFO size */
#define E1000_FC_LOW_DIFF 0x1640   /* Low:  5696 bytes below Rx FIFO size */

#define E1000_FC_PAUSE_TIME 0x0680 /* 858 usec */

/* How many Tx Descriptors do we need to call netif_wake_queue ? */
#define E1000_TX_QUEUE_WAKE	16
/* How many Rx Buffers do we bundle into one write to the hardware ? */
#define E1000_RX_BUFFER_WRITE	16	/* Must be power of 2 */

#define AUTO_ALL_MODES            0
#define E1000_EEPROM_82544_APM    0x0004
#define E1000_EEPROM_ICH8_APME    0x0004
#define E1000_EEPROM_APME         0x0400

#ifndef E1000_MASTER_SLAVE
/* Switch to override PHY master/slave setting */
#define E1000_MASTER_SLAVE	e1000_ms_hw_default
#endif

#define E1000_MNG_VLAN_NONE -1
/* Number of packet split data buffers (not including the header buffer) */
#define PS_PAGE_BUFFERS MAX_PS_BUFFERS-1

/* wrapper around a pointer to a socket buffer,
 * so a DMA handle can be stored along with the buffer */
struct e1000_buffer {
	struct sk_buff *skb;
	dma_addr_t dma;
	unsigned long time_stamp;
	uint16_t length;
	uint16_t next_to_watch;
};


struct e1000_ps_page { struct page *ps_page[PS_PAGE_BUFFERS]; };
struct e1000_ps_page_dma { uint64_t ps_page_dma[PS_PAGE_BUFFERS]; };

struct e1000_tx_ring {
	/* pointer to the descriptor ring memory */
	void *desc;
	/* physical address of the descriptor ring */
	dma_addr_t dma;
	/* length of descriptor ring in bytes */
	unsigned int size;
	/* number of descriptors in the ring */
	unsigned int count;
	/* next descriptor to associate a buffer with */
	unsigned int next_to_use;
	/* next descriptor to check for DD status bit */
	unsigned int next_to_clean;
	/* array of buffer information structs */
	struct e1000_buffer *buffer_info;

	spinlock_t tx_lock;
	uint16_t tdh;
	uint16_t tdt;
	boolean_t last_tx_tso;
};

struct e1000_rx_ring {
	/* pointer to the descriptor ring memory */
	void *desc;
	/* physical address of the descriptor ring */
	dma_addr_t dma;
	/* length of descriptor ring in bytes */
	unsigned int size;
	/* number of descriptors in the ring */
	unsigned int count;
	/* next descriptor to associate a buffer with */
	unsigned int next_to_use;
	/* next descriptor to check for DD status bit */
	unsigned int next_to_clean;
	/* array of buffer information structs */
	struct e1000_buffer *buffer_info;
	/* arrays of page information for packet split */
	struct e1000_ps_page *ps_page;
	struct e1000_ps_page_dma *ps_page_dma;

	/* cpu for rx queue */
	int cpu;

	uint16_t rdh;
	uint16_t rdt;
};

#define E1000_DESC_UNUSED(R) \
	((((R)->next_to_clean > (R)->next_to_use) ? 0 : (R)->count) + \
	(R)->next_to_clean - (R)->next_to_use - 1)

#define E1000_RX_DESC_PS(R, i)	    \
	(&(((union e1000_rx_desc_packet_split *)((R).desc))[i]))
#define E1000_RX_DESC_EXT(R, i)	    \
	(&(((union e1000_rx_desc_extended *)((R).desc))[i]))
#define E1000_GET_DESC(R, i, type)	(&(((struct type *)((R).desc))[i]))
#define E1000_RX_DESC(R, i)		E1000_GET_DESC(R, i, e1000_rx_desc)
#define E1000_TX_DESC(R, i)		E1000_GET_DESC(R, i, e1000_tx_desc)
#define E1000_CONTEXT_DESC(R, i)	E1000_GET_DESC(R, i, e1000_context_desc)

/* board specific private data structure */

struct e1000_adapter {
	struct timer_list tx_fifo_stall_timer;
	struct timer_list watchdog_timer;
	struct timer_list phy_info_timer;
	struct vlan_group *vlgrp;
	uint16_t mng_vlan_id;
	uint32_t bd_number;
	uint32_t rx_buffer_len;
	uint32_t wol;
	uint32_t smartspeed;
	uint32_t en_mng_pt;
	uint16_t link_speed;
	uint16_t link_duplex;
	spinlock_t stats_lock;
#ifdef CONFIG_E1000_NAPI
	spinlock_t tx_queue_lock;
#endif
	atomic_t irq_sem;
	unsigned int total_tx_bytes;
	unsigned int total_tx_packets;
	unsigned int total_rx_bytes;
	unsigned int total_rx_packets;
	/* Interrupt Throttle Rate */
	uint32_t itr;
	uint32_t itr_setting;
	uint16_t tx_itr;
	uint16_t rx_itr;

	struct work_struct reset_task;
	uint8_t fc_autoneg;

	struct timer_list blink_timer;
	unsigned long led_status;

	/* TX */
	struct e1000_tx_ring *tx_ring;      /* One per active queue */
	unsigned int restart_queue;
	unsigned long tx_queue_len;
	uint32_t txd_cmd;
	uint32_t tx_int_delay;
	uint32_t tx_abs_int_delay;
	uint32_t gotcl;
	uint64_t gotcl_old;
	uint64_t tpt_old;
	uint64_t colc_old;
	uint32_t tx_timeout_count;
	uint32_t tx_fifo_head;
	uint32_t tx_head_addr;
	uint32_t tx_fifo_size;
	uint8_t  tx_timeout_factor;
	atomic_t tx_fifo_stall;
	boolean_t pcix_82544;
	boolean_t detect_tx_hung;

	/* RX */
#ifdef CONFIG_E1000_NAPI
	boolean_t (*clean_rx) (struct e1000_adapter *adapter,
			       struct e1000_rx_ring *rx_ring,
			       int *work_done, int work_to_do);
#else
	boolean_t (*clean_rx) (struct e1000_adapter *adapter,
			       struct e1000_rx_ring *rx_ring);
#endif
	void (*alloc_rx_buf) (struct e1000_adapter *adapter,
			      struct e1000_rx_ring *rx_ring,
				int cleaned_count);
	struct e1000_rx_ring *rx_ring;      /* One per active queue */
#ifdef CONFIG_E1000_NAPI
	struct net_device *polling_netdev;  /* One per active queue */
#endif
	int num_tx_queues;
	int num_rx_queues;

	uint64_t hw_csum_err;
	uint64_t hw_csum_good;
	uint64_t rx_hdr_split;
	uint32_t alloc_rx_buff_failed;
	uint32_t rx_int_delay;
	uint32_t rx_abs_int_delay;
	boolean_t rx_csum;
	unsigned int rx_ps_pages;
	uint32_t gorcl;
	uint64_t gorcl_old;
	uint16_t rx_ps_bsize0;


	/* OS defined structs */
	struct net_device *netdev;
	struct pci_dev *pdev;
	struct net_device_stats net_stats;

	/* structs defined in e1000_hw.h */
	struct e1000_hw hw;
	struct e1000_hw_stats stats;
	struct e1000_phy_info phy_info;
	struct e1000_phy_stats phy_stats;

	uint32_t test_icr;
	struct e1000_tx_ring test_tx_ring;
	struct e1000_rx_ring test_rx_ring;


	int msg_enable;
#ifdef CONFIG_PCI_MSI
	boolean_t have_msi;
#endif
	/* to not mess up cache alignment, always add to the bottom */
	boolean_t tso_force;
	boolean_t smart_power_down;	/* phy smart power down */
	boolean_t quad_port_a;
	unsigned long flags;
	uint32_t eeprom_wol;
};

enum e1000_state_t {
	__E1000_TESTING,
	__E1000_RESETTING,
	__E1000_DOWN
};

#endif /* _E1000_H_ */