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

  Intel PRO/1000 Linux driver
  Copyright(c) 1999 - 2008 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 "e1000_api.h"

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

struct e1000_adapter;

/* 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_TXD_PWR               12
#define E1000_MAX_TXD_PWR                   12
#define E1000_MIN_TXD_PWR                    7

#define E1000_DEFAULT_RXD                  256
#define E1000_MAX_RXD                      256

#define E1000_MIN_RXD                       80
#define E1000_MAX_82544_RXD               4096

#define E1000_MIN_ITR_USECS                 10	/* 100000 irq/sec */
#define E1000_MAX_ITR_USECS              10000	/* 100    irq/sec */

/* 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
#define E1000_RXBUFFER_256   256
#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

/* Early Receive defines */
#define E1000_ERT_2048 0x100

#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_APME         0x0400

/* 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_rx_buffer {
	struct sk_buff *skb;
	dma_addr_t dma;
	struct page *page;
};

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;

	/* TXDdescriptor index increment to be used when advancing
	 * to the next descriptor. This is normally one, but on some
	 * architectures, but on some architectures there are cache
	 * coherency issues that require only the first descriptor in
	 * cache line can be used.
	 */
	unsigned int step;

	bool last_tx_tso;
};

struct e1000_rx_ring {
	struct e1000_adapter *adapter;	/* back link */
	/* 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_rx_buffer *buffer_info;
	struct sk_buff *rx_skb_top;

	/* cpu for rx queue */
	int cpu;

	uint16_t rdh;
	uint16_t rdt;
};

#define E1000_TX_DESC_INC(R,index) \
	{index += (R)->step; if (index == (R)->count) index = 0; }

#define E1000_TX_DESC_DEC(R,index) \
	{ if (index == 0) index = (R)->count - (R)->step; \
	else index -= (R)->step; }

#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_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 {
	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;
	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;

	bool fc_autoneg;

	/* TX */
	struct e1000_tx_ring *tx_ring;
	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 gotc;
	u64 gotc_old;
	u64 tpt_old;
	u64 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;
	bool pcix_82544;
	bool detect_tx_hung;

	/* RX */
	 bool(*clean_rx) (struct e1000_adapter * adapter,
					  struct e1000_rx_ring * rx_ring);
	void (*alloc_rx_buf) (struct e1000_adapter * adapter,
						  struct e1000_rx_ring * rx_ring, int cleaned_count);
	struct e1000_rx_ring *rx_ring;

	u64 hw_csum_err;
	u64 hw_csum_good;
	uint32_t alloc_rx_buff_failed;
	uint32_t rx_int_delay;
	uint32_t rx_abs_int_delay;
	bool rx_csum;
	uint32_t gorc;
	u64 gorc_old;
	uint32_t max_frame_size;
	uint32_t min_frame_size;

	/* OS defined structs */
	struct net_device *netdev;
	struct pci_device *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;

	int msg_enable;
	/* to not mess up cache alignment, always add to the bottom */
	unsigned long state;
	uint32_t eeprom_wol;

	uint32_t *config_space;

	/* hardware capability, feature, and workaround flags */
	unsigned int flags;

	/* upper limit parameter for tx desc size */
	uint32_t tx_desc_pwr;

#define NUM_TX_DESC	8
#define NUM_RX_DESC	8

	struct io_buffer *tx_iobuf[NUM_TX_DESC];
	struct io_buffer *rx_iobuf[NUM_RX_DESC];

	struct e1000_tx_desc *tx_base;
	struct e1000_rx_desc *rx_base;

	uint32_t tx_ring_size;
	uint32_t rx_ring_size;

	uint32_t tx_head;
	uint32_t tx_tail;
	uint32_t tx_fill_ctr;

	uint32_t rx_curr;

	uint32_t ioaddr;
	uint32_t irqno;
};

#define E1000_FLAG_HAS_SMBUS                (1 << 0)
#define E1000_FLAG_HAS_INTR_MODERATION      (1 << 4)
#define E1000_FLAG_BAD_TX_CARRIER_STATS_FD  (1 << 6)
#define E1000_FLAG_QUAD_PORT_A              (1 << 8)
#define E1000_FLAG_SMART_POWER_DOWN         (1 << 9)

extern char e1000_driver_name[];
extern const char e1000_driver_version[];

extern void e1000_power_up_phy(struct e1000_hw *hw);

extern void e1000_set_ethtool_ops(struct net_device *netdev);
extern void e1000_check_options(struct e1000_adapter *adapter);

extern int e1000_up(struct e1000_adapter *adapter);
extern void e1000_down(struct e1000_adapter *adapter);
extern void e1000_reinit_locked(struct e1000_adapter *adapter);
extern void e1000_reset(struct e1000_adapter *adapter);
extern int e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx);
extern int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
extern int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);
extern void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
extern void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
extern void e1000_update_stats(struct e1000_adapter *adapter);

#endif /* _E1000_H_ */