kernel.git - Linux vanilla kernels for Fedora – https://fedoraproject.org/wiki/Kernel_Vanilla

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/*
 * 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/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_LINUX_MAJOR 3
#define _NETXEN_NIC_LINUX_MINOR 4
#define _NETXEN_NIC_LINUX_SUBVERSION 2
#define NETXEN_NIC_LINUX_VERSIONID  "3.4.2"

#define NUM_FLASH_SECTORS (64)
#define FLASH_SECTOR_SIZE (64 * 1024)
#define FLASH_TOTAL_SIZE  (NUM_FLASH_SECTORS * FLASH_SECTOR_SIZE)

#define PHAN_VENDOR_ID 0x4040

#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 LRO_DESC_RINGSIZE	\
	(sizeof(rcvDesc_t) * adapter->max_lro_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 NETXEN_RCV_PRODUCER_OFFSET	0
#define NETXEN_RCV_PEG_DB_ID		2
#define NETXEN_HOST_DUMMY_DMA_SIZE 1024
#define FLASH_SUCCESS 0

#define ADDR_IN_WINDOW1(off)	\
	((off > NETXEN_CRB_PCIX_HOST2) && (off < NETXEN_CRB_MAX)) ? 1 : 0
/*
 * In netxen_nic_down(), we must wait for any pending callback requests into
 * netxen_watchdog_task() to complete; eg otherwise the watchdog_timer could be
 * reenabled right after it is deleted in netxen_nic_down(). FLUSH_SCHEDULED_WORK()
 * does this synchronization.
 *
 * Normally, schedule_work()/flush_scheduled_work() could have worked, but
 * netxen_nic_close() is invoked with kernel rtnl lock held. netif_carrier_off()
 * call in netxen_nic_close() triggers a schedule_work(&linkwatch_work), and a
 * subsequent call to flush_scheduled_work() in netxen_nic_down() would cause
 * linkwatch_event() to be executed which also attempts to acquire the rtnl
 * lock thus causing a deadlock.
 */

#define SCHEDULE_WORK(tp)	queue_work(netxen_workq, tp)
#define FLUSH_SCHEDULED_WORK()	flush_workqueue(netxen_workq)
extern struct workqueue_struct *netxen_workq;

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

#define NETXEN_CRB_NORMALIZE(adapter, reg) \
	pci_base_offset(adapter, NETXEN_CRB_NORMAL(reg))

#define DB_NORMALIZE(adapter, off) \
	(adapter->ahw.db_base + (off))

#define NX_P2_C0		0x24
#define NX_P2_C1		0x25

#define FIRST_PAGE_GROUP_START	0
#define FIRST_PAGE_GROUP_END	0x100000

#define SECOND_PAGE_GROUP_START	0x4000000
#define SECOND_PAGE_GROUP_END	0x66BC000

#define THIRD_PAGE_GROUP_START	0x70E4000
#define THIRD_PAGE_GROUP_END	0x8000000

#define FIRST_PAGE_GROUP_SIZE  FIRST_PAGE_GROUP_END - FIRST_PAGE_GROUP_START
#define SECOND_PAGE_GROUP_SIZE SECOND_PAGE_GROUP_END - SECOND_PAGE_GROUP_START
#define THIRD_PAGE_GROUP_SIZE  THIRD_PAGE_GROUP_END - THIRD_PAGE_GROUP_START

#define MAX_RX_BUFFER_LENGTH		1760
#define MAX_RX_JUMBO_BUFFER_LENGTH 	8062
#define MAX_RX_LRO_BUFFER_LENGTH	((48*1024)-512)
#define RX_DMA_MAP_LEN			(MAX_RX_BUFFER_LENGTH - 2)
#define RX_JUMBO_DMA_MAP_LEN	\
	(MAX_RX_JUMBO_BUFFER_LENGTH - 2)
#define RX_LRO_DMA_MAP_LEN		(MAX_RX_LRO_BUFFER_LENGTH - 2)
#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	3	/* No of Rcv Descriptor contexts */

/* descriptor types */
#define RCV_DESC_NORMAL		0x01
#define RCV_DESC_JUMBO		0x02
#define RCV_DESC_LRO		0x04
#define RCV_DESC_NORMAL_CTXID	0
#define RCV_DESC_JUMBO_CTXID	1
#define RCV_DESC_LRO_CTXID	2

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

#define MAX_CMD_DESCRIPTORS		1024
#define MAX_RCV_DESCRIPTORS		16384
#define MAX_CMD_DESCRIPTORS_HOST	(MAX_CMD_DESCRIPTORS / 4)
#define MAX_RCV_DESCRIPTORS_1G		(MAX_RCV_DESCRIPTORS / 4)
#define MAX_JUMBO_RCV_DESCRIPTORS	1024
#define MAX_LRO_RCV_DESCRIPTORS		64
#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 MAX_EPG_DESCRIPTORS	(MAX_CMD_DESCRIPTORS * 8)
#define NUM_RCV_DESC		(MAX_RCV_DESC + MAX_JUMBO_RCV_DESCRIPTORS + \
				 MAX_LRO_RCV_DESCRIPTORS)
#define MIN_TX_COUNT	4096
#define MIN_RX_COUNT	4096
#define NETXEN_CTX_SIGNATURE	0xdee0
#define NETXEN_RCV_PRODUCER(ringid)	(ringid)
#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))

#define MPORT_SINGLE_FUNCTION_MODE 0x1111
#define MPORT_MULTI_FUNCTION_MODE 0x2222

#include "netxen_nic_phan_reg.h"
extern unsigned long long netxen_dma_mask;
extern unsigned long last_schedule_time;

/*
 * NetXen host-peg signal message structure
 *
 *	Bit 0-1		: peg_id => 0x2 for tx and 01 for rx
 *	Bit 2		: priv_id => must be 1
 *	Bit 3-17	: count => for doorbell
 *	Bit 18-27	: ctx_id => Context id
 *	Bit 28-31	: opcode
 */

typedef u32 netxen_ctx_msg;

#define netxen_set_msg_peg_id(config_word, val)	\
	((config_word) &= ~3, (config_word) |= val & 3)
#define netxen_set_msg_privid(config_word)	\
	((config_word) |= 1 << 2)
#define netxen_set_msg_count(config_word, val)	\
	((config_word) &= ~(0x7fff<<3), (config_word) |= (val & 0x7fff) << 3)
#define netxen_set_msg_ctxid(config_word, val)	\
	((config_word) &= ~(0x3ff<<18), (config_word) |= (val & 0x3ff) << 18)
#define netxen_set_msg_opcode(config_word, val)	\
	((config_word) &= ~(0xf<<28), (config_word) |= (val & 0xf) << 28)

struct netxen_rcv_context {
	__le64 rcv_ring_addr;
	__le32 rcv_ring_size;
	__le32 rsrvd;
};

struct netxen_ring_ctx {

	/* one command ring */
	__le64 cmd_consumer_offset;
	__le64 cmd_ring_addr;
	__le32 cmd_ring_size;
	__le32 rsrvd;

	/* three receive rings */
	struct netxen_rcv_context rcv_ctx[3];

	/* one status ring */
	__le64 sts_ring_addr;
	__le32 sts_ring_size;

	__le32 ctx_id;
} __attribute__ ((aligned(64)));

/*
 * 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 netxen_set_cmd_desc_port(cmd_desc, var)	\
	((cmd_desc)->port_ctxid |= ((var) & 0x0F))
#define netxen_set_cmd_desc_ctxid(cmd_desc, var)	\
	((cmd_desc)->port_ctxid |= ((var) & 0xF0))

#define netxen_set_cmd_desc_flags(cmd_desc, val)	\
	((cmd_desc)->flags_opcode &= ~cpu_to_le16(0x7f), \
	(cmd_desc)->flags_opcode |= cpu_to_le16((val) & 0x7f))
#define netxen_set_cmd_desc_opcode(cmd_desc, val)	\
	((cmd_desc)->flags_opcode &= ~cpu_to_le16(0x3f<<7), \
	(cmd_desc)->flags_opcode |= cpu_to_le16(((val & 0x3f)<<7)))

#define netxen_set_cmd_desc_num_of_buff(cmd_desc, val)	\
	((cmd_desc)->num_of_buffers_total_length &= ~cpu_to_le32(0xff), \
	(cmd_desc)->num_of_buffers_total_length |= cpu_to_le32((val) & 0xff))
#define netxen_set_cmd_desc_totallength(cmd_desc, val)	\
	((cmd_desc)->num_of_buffers_total_length &= ~cpu_to_le32(0xffffff00), \
	(cmd_desc)->num_of_buffers_total_length |= cpu_to_le32(val << 8))

#define netxen_get_cmd_desc_opcode(cmd_desc)	\
	((le16_to_cpu((cmd_desc)->flags_opcode) >> 7) & 0x003F)
#define netxen_get_cmd_desc_totallength(cmd_desc)	\
	(le32_to_cpu((cmd_desc)->num_of_buffers_total_length) >> 8)

struct cmd_desc_type0 {
	u8 tcp_hdr_offset;	/* For LSO only */
	u8 ip_hdr_offset;	/* For LSO only */
	/* Bit pattern: 0-6 flags, 7-12 opcode, 13-15 unused */
	__le16 flags_opcode;
	/* Bit pattern: 0-7 total number of segments,
	   8-31 Total size of the packet */
	__le32 num_of_buffers_total_length;
	union {
		struct {
			__le32 addr_low_part2;
			__le32 addr_high_part2;
		};
		__le64 addr_buffer2;
	};

	__le16 reference_handle;	/* changed to u16 to add mss */
	__le16 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 */
	__le16 conn_id;		/* IPSec offoad only */

	union {
		struct {
			__le32 addr_low_part3;
			__le32 addr_high_part3;
		};
		__le64 addr_buffer3;
	};
	union {
		struct {
			__le32 addr_low_part1;
			__le32 addr_high_part1;
		};
		__le64 addr_buffer1;
	};

	__le16 buffer1_length;
	__le16 buffer2_length;
	__le16 buffer3_length;
	__le16 buffer4_length;

	union {
		struct {
			__le32 addr_low_part4;
			__le32 addr_high_part4;
		};
		__le64 addr_buffer4;
	};

	__le64 unused;

} __attribute__ ((aligned(64)));

/* Note: sizeof(rcv_desc) should always be a mutliple of 2 */
struct rcv_desc {
	__le16 reference_handle;
	__le16 reserved;
	__le32 buffer_length;	/* allocated buffer length (usually 2K) */
	__le64 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 netxen_get_sts_desc_lro_cnt(status_desc)	\
	((status_desc)->lro & 0x7F)
#define netxen_get_sts_desc_lro_last_frag(status_desc)	\
	(((status_desc)->lro & 0x80) >> 7)

#define netxen_get_sts_port(status_desc)	\
	(le64_to_cpu((status_desc)->status_desc_data) & 0x0F)
#define netxen_get_sts_status(status_desc)	\
	((le64_to_cpu((status_desc)->status_desc_data) >> 4) & 0x0F)
#define netxen_get_sts_type(status_desc)	\
	((le64_to_cpu((status_desc)->status_desc_data) >> 8) & 0x0F)
#define netxen_get_sts_totallength(status_desc)	\
	((le64_to_cpu((status_desc)->status_desc_data) >> 12) & 0xFFFF)
#define netxen_get_sts_refhandle(status_desc)	\
	((le64_to_cpu((status_desc)->status_desc_data) >> 28) & 0xFFFF)
#define netxen_get_sts_prot(status_desc)	\
	((le64_to_cpu((status_desc)->status_desc_data) >> 44) & 0x0F)
#define netxen_get_sts_owner(status_desc)	\
	((le64_to_cpu((status_desc)->status_desc_data) >> 56) & 0x03)
#define netxen_get_sts_opcode(status_desc)	\
	((le64_to_cpu((status_desc)->status_desc_data) >> 58) & 0x03F)

#define netxen_clear_sts_owner(status_desc)	\
	((status_desc)->status_desc_data &=	\
	~cpu_to_le64(((unsigned long long)3) << 56 ))
#define netxen_set_sts_owner(status_desc, val)	\
	((status_desc)->status_desc_data |=	\
	cpu_to_le64(((unsigned long long)((val) & 0x3)) << 56 ))

struct status_desc {
	/* Bit pattern: 0-3 port, 4-7 status, 8-11 type, 12-27 total_length
	   28-43 reference_handle, 44-47 protocol, 48-52 unused
	   53-55 desc_cnt, 56-57 owner, 58-63 opcode
	 */
	__le64 status_desc_data;
	__le32 hash_value;
	u8 hash_type;
	u8 msg_type;
	u8 unused;
	/* Bit pattern: 0-6 lro_count indicates frag sequence,
	   7 last_frag indicates last frag */
	u8 lro;
} __attribute__ ((aligned(16)));

enum {
	NETXEN_RCV_PEG_0 = 0,
	NETXEN_RCV_PEG_1
};


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