drivers/net/netxen/netxen_nic.h

/*
 * Copyright (C) 2003 - 2006 NetXen, Inc.
 * All rights reserved.
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *                            
 * This program is distributed in the hope that 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., 59 Temple Place - Suite 330, Boston,
 * MA  02111-1307, USA.
 * 
 * The full GNU General Public License is included in this distribution
 * in the file called LICENSE.
 * 
 * Contact Information:
 *    info@netxen.com
 * NetXen,
 * 3965 Freedom Circle, Fourth floor,
 * Santa Clara, CA 95054
 */

#ifndef _NETXEN_NIC_H_
#define _NETXEN_NIC_H_

#include <linux/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/compiler.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/pci.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ip.h>
#include <linux/in.h>
#include <linux/tcp.h>
#include <linux/skbuff.h>
#include <linux/version.h>

#include <linux/ethtool.h>
#include <linux/mii.h>
#include <linux/interrupt.h>
#include <linux/timer.h>

#include <linux/mm.h>
#include <linux/mman.h>

#include <asm/system.h>
#include <asm/io.h>
#include <asm/byteorder.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>

#include "netxen_nic_hw.h"

#define NETXEN_NIC_BUILD_NO     "232"
#define _NETXEN_NIC_LINUX_MAJOR 2
#define _NETXEN_NIC_LINUX_MINOR 3
#define _NETXEN_NIC_LINUX_SUBVERSION 57
#define NETXEN_NIC_LINUX_VERSIONID  "2.3.57"
#define NETXEN_NIC_FW_VERSIONID "2.3.57"

#define RCV_DESC_RINGSIZE	\
	(sizeof(struct rcv_desc) * adapter->max_rx_desc_count)
#define STATUS_DESC_RINGSIZE	\
	(sizeof(struct status_desc)* adapter->max_rx_desc_count)
#define TX_RINGSIZE	\
	(sizeof(struct netxen_cmd_buffer) * adapter->max_tx_desc_count)
#define RCV_BUFFSIZE	\
	(sizeof(struct netxen_rx_buffer) * rcv_desc->max_rx_desc_count)
#define find_diff_among(a,b,range) ((a)<(b)?((b)-(a)):((b)+(range)-(a)))

#define NETXEN_NETDEV_STATUS 0x1

#define ADDR_IN_WINDOW1(off)	\
	((off > NETXEN_CRB_PCIX_HOST2) && (off < NETXEN_CRB_MAX)) ? 1 : 0

/* 
 * normalize a 64MB crb address to 32MB PCI window 
 * To use NETXEN_CRB_NORMALIZE, window _must_ be set to 1
 */
#define NETXEN_CRB_NORMALIZE(adapter, reg) \
	((adapter)->ahw.pci_base + (reg)	\
	- NETXEN_CRB_PCIX_HOST2 + NETXEN_CRB_PCIX_HOST)

#define MAX_RX_BUFFER_LENGTH		2000
#define MAX_RX_JUMBO_BUFFER_LENGTH 	9046
#define RX_DMA_MAP_LEN			(MAX_RX_BUFFER_LENGTH - NET_IP_ALIGN)
#define RX_JUMBO_DMA_MAP_LEN	\
	(MAX_RX_JUMBO_BUFFER_LENGTH - NET_IP_ALIGN)
#define NETXEN_ROM_ROUNDUP		0x80000000ULL

/*
 * Maximum number of ring contexts
 */
#define MAX_RING_CTX 1

/* Opcodes to be used with the commands */
enum {
	TX_ETHER_PKT = 0x01,
/* The following opcodes are for IP checksum	*/
	TX_TCP_PKT,
	TX_UDP_PKT,
	TX_IP_PKT,
	TX_TCP_LSO,
	TX_IPSEC,
	TX_IPSEC_CMD
};

/* The following opcodes are for internal consumption. */
#define NETXEN_CONTROL_OP	0x10
#define PEGNET_REQUEST		0x11

#define	MAX_NUM_CARDS		4

#define MAX_BUFFERS_PER_CMD	32

/*
 * Following are the states of the Phantom. Phantom will set them and
 * Host will read to check if the fields are correct.
 */
#define PHAN_INITIALIZE_START		0xff00
#define PHAN_INITIALIZE_FAILED		0xffff
#define PHAN_INITIALIZE_COMPLETE	0xff01

/* Host writes the following to notify that it has done the init-handshake */
#define PHAN_INITIALIZE_ACK	0xf00f

#define NUM_RCV_DESC_RINGS	2	/* No of Rcv Descriptor contexts */

/* descriptor types */
#define RCV_DESC_NORMAL		0x01
#define RCV_DESC_JUMBO		0x02
#define RCV_DESC_NORMAL_CTXID	0
#define RCV_DESC_JUMBO_CTXID	1

#define RCV_DESC_TYPE(ID) \
	((ID == RCV_DESC_JUMBO_CTXID) ? RCV_DESC_JUMBO : RCV_DESC_NORMAL)

#define MAX_CMD_DESCRIPTORS		1024
#define MAX_RCV_DESCRIPTORS		32768
#define MAX_JUMBO_RCV_DESCRIPTORS	1024
#define MAX_RCVSTATUS_DESCRIPTORS	MAX_RCV_DESCRIPTORS
#define MAX_JUMBO_RCV_DESC	MAX_JUMBO_RCV_DESCRIPTORS
#define MAX_RCV_DESC		MAX_RCV_DESCRIPTORS
#define MAX_RCVSTATUS_DESC	MAX_RCV_DESCRIPTORS
#define NUM_RCV_DESC		(MAX_RCV_DESC + MAX_JUMBO_RCV_DESCRIPTORS)
#define MAX_EPG_DESCRIPTORS	(MAX_CMD_DESCRIPTORS * 8)

#define MIN_TX_COUNT	4096
#define MIN_RX_COUNT	4096

#define MAX_FRAME_SIZE	0x10000	/* 64K MAX size for LSO */

#define PHAN_PEG_RCV_INITIALIZED	0xff01
#define PHAN_PEG_RCV_START_INITIALIZE	0xff00

#define get_next_index(index, length)	\
	(((index) + 1) & ((length) - 1))

#define get_index_range(index,length,count)	\
	(((index) + (count)) & ((length) - 1))

/*
 * Following data structures describe the descriptors that will be used.
 * Added fileds of tcpHdrSize and ipHdrSize, The driver needs to do it only when
 * we are doing LSO (above the 1500 size packet) only.
 */

/*
 * The size of reference handle been changed to 16 bits to pass the MSS fields
 * for the LSO packet
 */

#define FLAGS_CHECKSUM_ENABLED	0x01
#define FLAGS_LSO_ENABLED	0x02
#define FLAGS_IPSEC_SA_ADD	0x04
#define FLAGS_IPSEC_SA_DELETE	0x08
#define FLAGS_VLAN_TAGGED	0x10

#define CMD_DESC_TOTAL_LENGTH(cmd_desc)	\
		((cmd_desc)->length_tcp_hdr & 0x00FFFFFF)
#define CMD_DESC_TCP_HDR_OFFSET(cmd_desc)	\
		(((cmd_desc)->length_tcp_hdr >> 24) & 0x0FF)
#define CMD_DESC_PORT(cmd_desc)		((cmd_desc)->port_ctxid & 0x0F)
#define CMD_DESC_CTX_ID(cmd_desc)	(((cmd_desc)->port_ctxid >> 4) & 0x0F)

#define CMD_DESC_TOTAL_LENGTH_WRT(cmd_desc, var)	\
		((cmd_desc)->length_tcp_hdr |= ((var) & 0x00FFFFFF))
#define CMD_DESC_TCP_HDR_OFFSET_WRT(cmd_desc, var)	\
		((cmd_desc)->length_tcp_hdr |= (((var) << 24) & 0xFF000000))
#define CMD_DESC_PORT_WRT(cmd_desc, var)	\
		((cmd_desc)->port_ctxid |= ((var) & 0x0F))

struct cmd_desc_type0 {
	u64 netxen_next;	/* for fragments handled by Phantom */
	union {
		struct {
			u32 addr_low_part2;
			u32 addr_high_part2;
		};
		u64 addr_buffer2;
	};

	/* Bit pattern: 0-23 total length, 24-32 tcp header offset */
	u32 length_tcp_hdr;
	u8 ip_hdr_offset;	/* For LSO only */
	u8 num_of_buffers;	/* total number of segments */
	u8 flags;		/* as defined above */
	u8 opcode;

	u16 reference_handle;	/* changed to u16 to add mss */
	u16 mss;		/* passed by NDIS_PACKET for LSO */
	/* Bit pattern 0-3 port, 0-3 ctx id */
	u8 port_ctxid;
	u8 total_hdr_length;	/* LSO only : MAC+IP+TCP Hdr size */
	u16 conn_id;		/* IPSec offoad only */

	union {
		struct {
			u32 addr_low_part3;
			u32 addr_high_part3;
		};
		u64 addr_buffer3;
	};

	union {
		struct {
			u32 addr_low_part1;
			u32 addr_high_part1;
		};
		u64 addr_buffer1;
	};

	u16 buffer1_length;
	u16 buffer2_length;
	u16 buffer3_length;
	u16 buffer4_length;

	union {
		struct {
			u32 addr_low_part4;
			u32 addr_high_part4;
		};
		u64 addr_buffer4;
	};

} __attribute__ ((aligned(64)));

/* Note: sizeof(rcv_desc) should always be a mutliple of 2 */
struct rcv_desc {
	u16 reference_handle;
	u16 reserved;
	u32 buffer_length;	/* allocated buffer length (usually 2K) */
	u64 addr_buffer;
};

/* opcode field in status_desc */
#define RCV_NIC_PKT	(0xA)
#define STATUS_NIC_PKT	((RCV_NIC_PKT) << 12)

/* for status field in status_desc */
#define STATUS_NEED_CKSUM	(1)
#define STATUS_CKSUM_OK		(2)

/* owner bits of status_desc */
#define STATUS_OWNER_HOST	(0x1)
#define STATUS_OWNER_PHANTOM	(0x2)

#define NETXEN_PROT_IP		(1)
#define NETXEN_PROT_UNKNOWN	(0)

/* Note: sizeof(status_desc) should always be a mutliple of 2 */
#define STATUS_DESC_PORT(status_desc)	\
		((status_desc)->port_status_type_op & 0x0F)
#define STATUS_DESC_STATUS(status_desc)	\
		(((status_desc)->port_status_type_op >> 4) & 0x0F)
#define STATUS_DESC_TYPE(status_desc)	\
		(((status_desc)->port_status_type_op >> 8) & 0x0F)
#define STATUS_DESC_OPCODE(status_desc)	\
		(((status_desc)->port_status_type_op >> 12) & 0x0F)

struct status_desc {
	/* Bit pattern: 0-3 port, 4-7 status, 8-11 type, 12-15 opcode */
	u16 port_status_type_op;
	u16 total_length;	/* NIC mode */
	u16 reference_handle;	/* handle for the associated packet */
	/* Bit pattern: 0-1 owner, 2-5 protocol */
	u16 owner;		/* Owner of the descriptor */
} __attribute__ ((aligned(8)));

enum {
	NETXEN_RCV_PEG_0 = 0,
	NETXEN_RCV_PEG_1
};
/* The version of the main data structure */
#define	NETXEN_BDINFO_VERSION 1

/* Magic number to let user know flash is programmed */
#define	NETXEN_BDINFO_MAGIC 0x12345678

/* Max number of Gig ports on a Phantom board */
#define NETXEN_MAX_PORTS 4

typedef enum {
	NETXEN_BRDTYPE_P1_BD = 0x0000,
	NETXEN_BRDTYPE_P1_SB = 0x0001,
	NETXEN_BRDTYPE_P1_SMAX = 0x0002,
	NETXEN_BRDTYPE_P1_SOCK = 0x0003,

	NETXEN_BRDTYPE_P2_SOCK_31 = 0x0008,
	NETXEN_BRDTYPE_P2_SOCK_35 = 0x0009,
	NETXEN_BRDTYPE_P2_SB35_4G = 0x000a,
	NETXEN_BRDTYPE_P2_SB31_10G = 0x000b,
	NETXEN_BRDTYPE_P2_SB31_2G = 0x000c,

	NETXEN_BRDTYPE_P2_SB31_10G_IMEZ = 0x000d,
	NETXEN_BRDTYPE_P2_SB31_10G_HMEZ = 0x000e,
	NETXEN_BRDTYPE_P2_SB31_10G_CX4 = 0x000f
} netxen_brdtype_t;

typedef enum {
	NETXEN_BRDMFG_INVENTEC = 1
} netxen_brdmfg;

typedef enum {
	MEM_ORG_128Mbx4 = 0x0,	/* DDR1 only */
	MEM_ORG_128Mbx8 = 0x1,	/* DDR1 only */
	MEM_ORG_128Mbx16 = 0x2,	/* DDR1 only */
	MEM_ORG_256Mbx4 = 0x3,
	MEM_ORG_256Mbx8 = 0x4,
	MEM_ORG_256Mbx16 = 0x5,
	MEM_ORG_512Mbx4 = 0x6,
	MEM_ORG_512Mbx8 = 0x7,
	MEM_ORG_512Mbx16 = 0x8,
	MEM_ORG_1Gbx4 = 0x9,
	MEM_ORG_1Gbx8 = 0xa,
	MEM_ORG_1Gbx16 = 0xb,
	MEM_ORG_2Gbx4 = 0xc,
	MEM_ORG_2Gbx8 = 0xd,
	MEM_ORG_2Gbx16 = 0xe,
	MEM_ORG_128Mbx32 = 0x10002,	/* GDDR only */
	MEM_ORG_256Mbx32 = 0x10005	/* GDDR only */
} netxen_mn_mem_org_t;

typedef enum {
	MEM_ORG_512Kx36 = 0x0,
	MEM_ORG_1Mx36 = 0x1,
	MEM_ORG_2Mx36 = 0x2
} netxen_sn_mem_org_t;

typedef enum {
	MEM_DEPTH_4MB = 0x1,
	MEM_DEPTH_8MB = 0x2,
	MEM_DEPTH_16MB = 0x3,
	MEM_DEPTH_32MB = 0x4,
	MEM_DEPTH_64MB = 0x5,
	MEM_DEPTH_128MB = 0x6,
	MEM_DEPTH_256MB = 0x7,
	MEM_DEPTH_512MB = 0x8,
	MEM_DEPTH_1GB = 0x9,
	MEM_DEPTH_2GB = 0xa,
	MEM_DEPTH_4GB = 0xb,
	MEM_DEPTH_8GB = 0xc,
	MEM_DEPTH_16GB = 0xd,
	MEM_DEPTH_32GB = 0xe
} netxen_mem_depth_t;

struct netxen_board_info {
	u32 header_version;

	u32 board_mfg;
	u32 board_type;
	u32 board_num;
	u32 chip_id;
	u32 chip_minor;
	u32 chip_major;
	u32 chip_pkg;
	u32 chip_lot;

	u32 port_mask;		/* available niu ports */
	u32 peg_mask;		/* available pegs */
	u32 icache_ok;		/* can we run with icache? */
	u32 dcache_ok;		/* can we run with dcache? */
	u32 casper_ok;

	u32 mac_addr_lo_0;
	u32 mac_addr_lo_1;
	u32 mac_addr_lo_2;
	u32 mac_addr_lo_3;

	/* MN-related config */
	u32 mn_sync_mode;	/* enable/ sync shift cclk/ sync shift mclk */
	u32 mn_sync_shift_cclk;
	u32 mn_sync_shift_mclk;
	u32 mn_wb_en;
	u32 mn_crystal_freq;	/* in MHz */
	u32 mn_speed;		/* in MHz */
	u32 mn_org;
	u32 mn_depth;
	u32 mn_ranks_0;		/* ranks per slot */
	u32 mn_ranks_1;		/* ranks per slot */
	u32 mn_rd_latency_0;
	u32 mn_rd_latency_1;
	u32 mn_rd_latency_2;
	u32 mn_rd_latency_3;
	u32 mn_rd_latency_4;
	u32 mn_rd_latency_5;
	u32 mn_rd_latency_6;
	u32 mn_rd_latency_7;
	u32 mn_rd_latency_8;
	u32 mn_dll_val[18];
	u32 mn_mode_reg;	/* MIU DDR Mode Register */
	u32 mn_ext_mode_reg;	/* MIU DDR Extended Mode Register */
	u32 mn_timing_0;	/* MIU Memory Control Timing Rgister */
	u32 mn_timing_1;	/* MIU Extended Memory Ctrl Timing Register */
	u32 mn_timing_2;	/* MIU Extended Memory Ctrl Timing2 Register */

	/* SN-related config */
	u32 sn_sync_mode;	/* enable/ sync shift cclk / sync shift mclk */
	u32 sn_pt_mode;		/* pass through mode */
	u32 sn_ecc_en;
	u32 sn_wb_en;
	u32 sn_crystal_freq;
	u32 sn_speed;
	u32 sn_org;
	u32 sn_depth;
	u32 sn_dll_tap;
	u32 sn_rd_latency;

	u32 mac_addr_hi_0;
	u32 mac_addr_hi_1;
	u32 mac_addr_hi_2;
	u32 mac_addr_hi_3;

	u32 magic;		/* indicates flash has been initialized */

	u32 mn_rdimm;
	u32 mn_dll_override;

};

#define FLASH_NUM_PORTS		(4)

struct netxen_flash_mac_addr {
	u32 flash_addr[32];
};

struct netxen_user_old_info {
	u8 flash_md5[16];
	u8 crbinit_md5[16];
	u8 brdcfg_md5[16];
	/* bootloader */
	u32 bootld_version;
	u32 bootld_size;
	u8 bootld_md5[16];
	/* image */
	u32 image_version;
	u32 image_size;
	u8 image_md5[16];
	/* primary image status */
	u32 primary_status;
	u32 secondary_present;

	/* MAC address , 4 ports */
	struct netxen_flash_mac_addr mac_addr[FLASH_NUM_PORTS];
};
#define FLASH_NUM_MAC_PER_PORT	32
struct netxen_user_info {
	u8 flash_md5[16 * 64];
	/* bootloader */
	u32 bootld_version;
	u32 bootld_size;
	/* image */
	u32 image_version;
	u32 image_size;
	/* primary image status */
	u32 primary_status;
	u32 secondary_present;

	/* MAC address , 4 ports, 32 address per port */
	u64 mac_addr[FLASH_NUM_PORTS * FLASH_NUM_MAC_PER_PORT];
	u32 sub_sys_id;
	u8 serial_num[32];

	/* Any user defined data */
};

/*
 * Flash Layout - new format.
 */
struct netxen_new_user_info {
	u8 flash_md5[16 * 64];
	/* bootloader */
	u32 bootld_version;
	u32 bootld_size;
	/* image */
	u32 image_version;
	u32 image_size;
	/* primary image status */
	u32 primary_status;
	u32 secondary_present;

	/* MAC address , 4 ports, 32 address per port */
	u64 mac_addr[FLASH_NUM_PORTS * FLASH_NUM_MAC_PER_PORT];
	u32 sub_sys_id;
	u8 serial_num[32];

	/* Any user defined data */
};

#define SECONDARY_IMAGE_PRESENT 0xb3b4b5b6
#define SECONDARY_IMAGE_ABSENT	0xffffffff
#define PRIMARY_IMAGE_GOOD	0x5a5a5a5a
#define PRIMARY_IMAGE_BAD	0xffffffff

/* Flash memory map */
typedef enum {
	CRBINIT_START = 0,	/* Crbinit section */
	BRDCFG_START = 0x4000,	/* board config */
	INITCODE_START = 0x6000,	/* pegtune code */
	BOOTLD_START = 0x10000,	/* bootld */
	IMAGE_START = 0x43000,	/* compressed image */
	SECONDARY_START = 0x200000,	/* backup images */
	PXE_START = 0x3E0000,	/* user defined region */
	USER_START = 0x3E8000,	/* User defined region for new boards */
	FIXED_START = 0x3F0000	/* backup of crbinit */
} netxen_flash_map_t;

#define USER_START_OLD PXE_START	/* for backward compatibility */

#define FLASH_START		(CRBINIT_START)
#define INIT_SECTOR		(0)
#define PRIMARY_START 		(BOOTLD_START)
#define FLASH_CRBINIT_SIZE 	(0x4000)
#define FLASH_BRDCFG_SIZE 	(sizeof(struct netxen_board_info))
#define FLASH_USER_SIZE		(sizeof(netxen_user_info)/sizeof(u32))
#define FLASH_SECONDARY_SIZE 	(USER_START-SECONDARY_START)
#define NUM_PRIMARY_SECTORS	(0x20)
#define NUM_CONFIG_SECTORS 	(1)
#define PFX "netxen: "

/* Note: Make sure to not call this before adapter->port is valid */
#if !defined(NETXEN_DEBUG)
#define DPRINTK(klevel, fmt, args...)	do { \
	} while (0)
#else
#define DPRINTK(klevel, fmt, args...)	do { \
	printk(KERN_##klevel PFX "%s: %s: " fmt, __FUNCTION__,\
		(adapter != NULL && adapter->port != NULL && \
		adapter->port[0] != NULL && \
		adapter->port[0]->netdev != NULL) ? \
		adapter->port[0]->netdev->name : NULL, \
		## args); } while(0)
#endif

/* Number of status descriptors to handle per interrupt */
#define MAX_STATUS_HANDLE	(128)

/*
 * netxen_skb_frag{} is to contain mapping info for each SG list. This
 * has to be freed when DMA is complete. This is part of netxen_tx_buffer{}.
 */
struct netxen_skb_frag {
	u64 dma;
	u32 length;
};

/*    Following defines are for the state of the buffers    */
#define	NETXEN_BUFFER_FREE	0
#define	NETXEN_BUFFER_BUSY	1

/*
 * There will be one netxen_buffer per skb packet.    These will be
 * used to save the dma info for pci_unmap_page()
 */
struct netxen_cmd_buffer {
	struct sk_buff *skb;
	struct netxen_skb_frag frag_array[MAX_BUFFERS_PER_CMD + 1];
	u32 total_length;
	u32 mss;
	u16 port;
	u8 cmd;
	u8 frag_count;
	unsigned long time_stamp;
	u32 state;
	u32 no_of_descriptors;
};

/* In rx_buffer, we do not need multiple fragments as is a single buffer */
struct netxen_rx_buffer {
	struct sk_buff *skb;
	u64 dma;
	u16 ref_handle;
	u16 state;
};

/* Board types */
#define	NETXEN_NIC_GBE	0x01
#define	NETXEN_NIC_XGBE	0x02

/*
 * One hardware_context{} per adapter
 * contains interrupt info as well shared hardware info.
 */
struct netxen_hardware_context {
	struct pci_dev *pdev;
	void __iomem *pci_base;	/* base of mapped phantom memory */
	u8 revision_id;
	u16 board_type;
	u16 max_ports;
	struct netxen_board_info boardcfg;
	u32 xg_linkup;
	/* Address of cmd ring in Phantom */
	struct cmd_desc_type0 *cmd_desc_head;
	dma_addr_t cmd_desc_phys_addr;
	struct netxen_adapter *adapter;
};

#define MINIMUM_ETHERNET_FRAME_SIZE	64	/* With FCS */
#define ETHERNET_FCS_SIZE		4

struct netxen_adapter_stats {
	u64 ints;
	u64 hostints;
	u64 otherints;
	u64 process_rcv;
	u64 process_xmit;
	u64 noxmitdone;
	u64 xmitcsummed;
	u64 post_called;
	u64 posted;
	u64 lastposted;
	u64 goodskbposts;
};

/*
 * Rcv Descriptor Context. One such per Rcv Descriptor. There may
 * be one Rcv Descriptor for normal packets, one for jumbo and may be others.
 */
struct netxen_rcv_desc_ctx {
	u32 flags;
	u32 producer;
	u32 rcv_pending;	/* Num of bufs posted in phantom */
	u32 rcv_free;		/* Num of bufs in free list */
	dma_addr_t phys_addr;
	struct rcv_desc *desc_head;	/* address of rx ring in Phantom */
	u32 max_rx_desc_count;
	u32 dma_size;
	u32 skb_size;
	struct netxen_rx_buffer *rx_buf_arr;	/* rx buffers for receive   */
	int begin_alloc;
};

/*
 * Receive context. There is one such structure per instance of the
 * receive processing. Any state information that is relevant to
 * the receive, and is must be in this structure. The global data may be
 * present elsewhere.
 */
struct netxen_recv_context {
	struct netxen_rcv_desc_ctx rcv_desc[NUM_RCV_DESC_RINGS];
	u32 status_rx_producer;
	u32 status_rx_consumer;
	dma_addr_t rcv_status_desc_phys_addr;
	struct status_desc *rcv_status_desc_head;
};

#define NETXEN_NIC_MSI_ENABLED 0x02

struct netxen_drvops;

struct netxen_adapter {
	struct netxen_hardware_context ahw;
	int port_count;		/* Number of configured ports  */
	int active_ports;	/* Number of open ports */
	struct netxen_port *port[NETXEN_MAX_PORTS];	/* ptr to each port  */
	spinlock_t tx_lock;
	spinlock_t lock;
	struct work_struct watchdog_task;
	struct work_struct tx_timeout_task;
	struct timer_list watchdog_timer;

	u32 curr_window;

	u32 cmd_producer;
	u32 cmd_consumer;

	u32 last_cmd_consumer;
	u32 max_tx_desc_count;
	u32 max_rx_desc_count;
	u32 max_jumbo_rx_desc_count;
	/* Num of instances active on cmd buffer ring */
	u32 proc_cmd_buf_counter;

	u32 num_threads, total_threads;	/*Use to keep track of xmit threads */

	u32 flags;
	u32 irq;
	int driver_mismatch;

	struct netxen_adapter_stats stats;

	struct netxen_cmd_buffer *cmd_buf_arr;	/* Command buffers for xmit */

	/*
	 * Receive instances. These can be either one per port,
	 * or one per peg, etc.
	 */
	struct netxen_recv_context recv_ctx[MAX_RCV_CTX];

	int is_up;
	int work_done;
	struct netxen_drvops *ops;
};				/* netxen_adapter structure */

/* Max number of xmit producer threads that can run simultaneously */
#define	MAX_XMIT_PRODUCERS		16

struct netxen_port_stats {
	u64 rcvdbadskb;
	u64 xmitcalled;
	u64 xmitedframes;
	u64 xmitfinished;
	u64 badskblen;
	u64 nocmddescriptor;
	u64 polled;
	u64 uphappy;
	u64 updropped;
	u64 uplcong;
	u64 uphcong;
	u64 upmcong;
	u64 updunno;
	u64 skbfreed;
	u64 txdropped;
	u64 txnullskb;
	u64 csummed;
	u64 no_rcv;
	u64 rxbytes;
	u64 txbytes;
};

struct netxen_port {
	struct netxen_adapter *adapter;

	u16 portnum;		/* GBE port number */
	u16 link_speed;
	u16 link_duplex;
	u16 link_autoneg;

	int flags;

	struct net_device *netdev;
	struct pci_dev *pdev;
	struct net_device_stats net_stats;
	struct netxen_port_stats stats;
};

struct netxen_drvops {
	int (*enable_phy_interrupts) (struct netxen_adapter *, int);
	int (*disable_phy_interrupts) (struct netxen_adapter *, int);
	void (*handle_phy_intr) (struct netxen_adapter *);
	int (*macaddr_set) (struct netxen_port *, netxen_ethernet_macaddr_t);
	int (*set_mtu) (struct netxen_port *, int);
	int (*set_promisc) (struct netxen_adapter *, int,
			    netxen_niu_prom_mode_t);
	int (*unset_promisc) (struct netxen_adapter *, int,
			      netxen_niu_prom_mode_t);
	int (*phy_read) (struct netxen_adapter *, long phy, long reg, u32 *);
	int (*phy_write) (struct netxen_adapter *, long phy, long reg, u32 val);
	int (*init_port) (struct netxen_adapter *, int);
	void (*init_niu) (struct netxen_adapter *);
	int (*stop_port) (struct netxen_adapter *, int);
};

extern char netxen_nic_driver_name[];

int netxen_niu_xgbe_enable_phy_interrupts(struct netxen_adapter *adapter,
					  int port);
int netxen_niu_gbe_enable_phy_interrupts(struct netxen_adapter *adapter,
					 int port);
int netxen_niu_xgbe_disable_phy_interrupts(struct netxen_adapter *adapter,
					   int port);
int netxen_niu_gbe_disable_phy_interrupts(struct netxen_adapter *adapter,
					  int port);
int netxen_niu_xgbe_clear_phy_interrupts(struct netxen_adapter *adapter,
					 int port);
int netxen_niu_gbe_clear_phy_interrupts(struct netxen_adapter *adapter,
					int port);
void netxen_nic_xgbe_handle_phy_intr(struct netxen_adapter *adapter);
void netxen_nic_gbe_handle_phy_intr(struct netxen_adapter *adapter);
void netxen_niu_gbe_set_mii_mode(struct netxen_adapter *adapter, int port,
				 long enable);
void netxen_niu_gbe_set_gmii_mode(struct netxen_adapter *adapter, int port,
				  long enable);
int netxen_niu_gbe_phy_read(struct netxen_adapter *adapter, long phy, long reg,
			    __le32 * readval);
int netxen_niu_gbe_phy_write(struct netxen_adapter *adapter, long phy,
			     long reg, __le32 val);

/* Functions available from netxen_nic_hw.c */
int netxen_niu_xginit(struct netxen_adapter *);
int netxen_nic_set_mtu_xgb(struct netxen_port *port, int new_mtu);
int netxen_nic_set_mtu_gb(struct netxen_port *port, int new_mtu);
void netxen_nic_init_niu_gb(struct netxen_adapter *adapter);
void netxen_nic_pci_change_crbwindow(struct netxen_adapter *adapter, u32 wndw);
void netxen_nic_reg_write(struct netxen_adapter *adapter, u64 off, u32 val);
int netxen_nic_reg_read(struct netxen_adapter *adapter, u64 off);
void netxen_nic_write_w0(struct netxen_adapter *adapter, u32 index, u32 value);
void netxen_nic_read_w0(struct netxen_adapter *adapter, u32 index, u32 * value);

int netxen_nic_get_board_info(struct netxen_adapter *adapter);
int netxen_nic_hw_read_wx(struct netxen_adapter *adapter, u64 off, void *data,
			  int len);
int netxen_nic_hw_write_wx(struct netxen_adapter *adapter, u64 off, void *data,
			   int len);
void netxen_crb_writelit_adapter(struct netxen_adapter *adapter,
				 unsigned long off, int data);

/* Functions from netxen_nic_init.c */
void netxen_phantom_init(struct netxen_adapter *adapter);
void netxen_load_firmware(struct netxen_adapter *adapter);
int netxen_pinit_from_rom(struct netxen_adapter *adapter, int verbose);
int netxen_rom_fast_read(struct netxen_adapter *adapter, int addr, int *valp);

/* Functions from netxen_nic_isr.c */
void netxen_nic_isr_other(struct netxen_adapter *adapter);
void netxen_indicate_link_status(struct netxen_adapter *adapter, u32 port,
				 u32 link);
void netxen_handle_port_int(struct netxen_adapter *adapter, u32 port,
			    u32 enable);
void netxen_nic_stop_all_ports(struct netxen_adapter *adapter);
void netxen_initialize_adapter_sw(struct netxen_adapter *adapter);
void netxen_initialize_adapter_hw(struct netxen_adapter *adapter);
void netxen_initialize_adapter_ops(struct netxen_adapter *adapter);
int netxen_init_firmware(struct netxen_adapter *adapter);
void netxen_free_hw_resources(struct netxen_adapter *adapter);
void netxen_tso_check(struct netxen_adapter *adapter,
		      struct cmd_desc_type0 *desc, struct sk_buff *skb);
int netxen_nic_hw_resources(struct netxen_adapter *adapter);
void netxen_nic_clear_stats(struct netxen_adapter *adapter);
int
netxen_nic_do_ioctl(struct netxen_adapter *adapter, void *u_data,
		    struct netxen_port *port);
int netxen_nic_rx_has_work(struct netxen_adapter *adapter);
int netxen_nic_tx_has_work(struct netxen_adapter *adapter);
void netxen_watchdog_task(unsigned long v);
void netxen_post_rx_buffers(struct netxen_adapter *adapter, u32 ctx,
			    u32 ringid);
void netxen_process_cmd_ring(unsigned long data);
u32 netxen_process_rcv_ring(struct netxen_adapter *adapter, int ctx, int max);
void netxen_nic_set_multi(struct net_device *netdev);
int netxen_nic_change_mtu(struct net_device *netdev, int new_mtu);
int netxen_nic_set_mac(struct net_device *netdev, void *p);
struct net_device_stats *netxen_nic_get_stats(struct net_device *netdev);

static inline void netxen_nic_disable_int(struct netxen_adapter *adapter)
{
	/*
	 * ISR_INT_MASK: Can be read from window 0 or 1.
	 */
	writel(0x7ff, (void __iomem *)(adapter->ahw.pci_base + ISR_INT_MASK));
}

static inline void netxen_nic_enable_int(struct netxen_adapter *adapter)
{
	u32 mask;

	switch (adapter->ahw.board_type) {
	case NETXEN_NIC_GBE:
		mask = 0x77b;
		break;
	case NETXEN_NIC_XGBE:
		mask = 0x77f;
		break;
	default:
		mask = 0x7ff;
		break;
	}

	writel(mask, (void __iomem *)(adapter->ahw.pci_base + ISR_INT_MASK));

	if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
		mask = 0xbff;
		writel(mask, (void __iomem *)
		       (adapter->ahw.pci_base + ISR_INT_TARGET_MASK));
	}
}

int netxen_is_flash_supported(struct netxen_adapter *adapter);
int netxen_get_flash_mac_addr(struct netxen_adapter *adapter, u64 mac[]);

extern void netxen_change_ringparam(struct netxen_adapter *adapter);
extern int netxen_rom_fast_read(struct netxen_adapter *adapter, int addr,
				int *valp);

extern struct ethtool_ops netxen_nic_ethtool_ops;

#endif				/* __NETXEN_NIC_H_ */