path: root/drivers/scsi/qla4xxx/ql4_def.h

/*
 * QLogic iSCSI HBA Driver
 * Copyright (c)  2003-2010 QLogic Corporation
 *
 * See LICENSE.qla4xxx for copyright and licensing details.
 */

#ifndef __QL4_DEF_H
#define __QL4_DEF_H

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/module.h>
#include <linux/list.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/dmapool.h>
#include <linux/mempool.h>
#include <linux/spinlock.h>
#include <linux/workqueue.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/mutex.h>
#include <linux/aer.h>
#include <linux/bsg-lib.h>

#include <net/tcp.h>
#include <scsi/scsi.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_transport.h>
#include <scsi/scsi_transport_iscsi.h>
#include <scsi/scsi_bsg_iscsi.h>
#include <scsi/scsi_netlink.h>
#include <scsi/libiscsi.h>

#include "ql4_dbg.h"
#include "ql4_nx.h"
#include "ql4_fw.h"
#include "ql4_nvram.h"

#ifndef PCI_DEVICE_ID_QLOGIC_ISP4010
#define PCI_DEVICE_ID_QLOGIC_ISP4010	0x4010
#endif

#ifndef PCI_DEVICE_ID_QLOGIC_ISP4022
#define PCI_DEVICE_ID_QLOGIC_ISP4022	0x4022
#endif

#ifndef PCI_DEVICE_ID_QLOGIC_ISP4032
#define PCI_DEVICE_ID_QLOGIC_ISP4032	0x4032
#endif

#ifndef PCI_DEVICE_ID_QLOGIC_ISP8022
#define PCI_DEVICE_ID_QLOGIC_ISP8022	0x8022
#endif

#define ISP4XXX_PCI_FN_1	0x1
#define ISP4XXX_PCI_FN_2	0x3

#define QLA_SUCCESS			0
#define QLA_ERROR			1

/*
 * Data bit definitions
 */
#define BIT_0	0x1
#define BIT_1	0x2
#define BIT_2	0x4
#define BIT_3	0x8
#define BIT_4	0x10
#define BIT_5	0x20
#define BIT_6	0x40
#define BIT_7	0x80
#define BIT_8	0x100
#define BIT_9	0x200
#define BIT_10	0x400
#define BIT_11	0x800
#define BIT_12	0x1000
#define BIT_13	0x2000
#define BIT_14	0x4000
#define BIT_15	0x8000
#define BIT_16	0x10000
#define BIT_17	0x20000
#define BIT_18	0x40000
#define BIT_19	0x80000
#define BIT_20	0x100000
#define BIT_21	0x200000
#define BIT_22	0x400000
#define BIT_23	0x800000
#define BIT_24	0x1000000
#define BIT_25	0x2000000
#define BIT_26	0x4000000
#define BIT_27	0x8000000
#define BIT_28	0x10000000
#define BIT_29	0x20000000
#define BIT_30	0x40000000
#define BIT_31	0x80000000

/**
 * Macros to help code, maintain, etc.
 **/
#define ql4_printk(level, ha, format, arg...) \
	dev_printk(level , &((ha)->pdev->dev) , format , ## arg)


/*
 * Host adapter default definitions
 ***********************************/
#define MAX_HBAS		16
#define MAX_BUSES		1
#define MAX_TARGETS		MAX_DEV_DB_ENTRIES
#define MAX_LUNS		0xffff
#define MAX_AEN_ENTRIES		MAX_DEV_DB_ENTRIES
#define MAX_DDB_ENTRIES		MAX_DEV_DB_ENTRIES
#define MAX_PDU_ENTRIES		32
#define INVALID_ENTRY		0xFFFF
#define MAX_CMDS_TO_RISC	1024
#define MAX_SRBS		MAX_CMDS_TO_RISC
#define MBOX_AEN_REG_COUNT	8
#define MAX_INIT_RETRIES	5

/*
 * Buffer sizes
 */
#define REQUEST_QUEUE_DEPTH		MAX_CMDS_TO_RISC
#define RESPONSE_QUEUE_DEPTH		64
#define QUEUE_SIZE			64
#define DMA_BUFFER_SIZE			512

/*
 * Misc
 */
#define MAC_ADDR_LEN			6	/* in bytes */
#define IP_ADDR_LEN			4	/* in bytes */
#define IPv6_ADDR_LEN			16	/* IPv6 address size */
#define DRIVER_NAME			"qla4xxx"

#define MAX_LINKED_CMDS_PER_LUN		3
#define MAX_REQS_SERVICED_PER_INTR	1

#define ISCSI_IPADDR_SIZE		4	/* IP address size */
#define ISCSI_ALIAS_SIZE		32	/* ISCSI Alias name size */
#define ISCSI_NAME_SIZE			0xE0	/* ISCSI Name size */

#define QL4_SESS_RECOVERY_TMO		120	/* iSCSI session */
						/* recovery timeout */

#define MSB(x) ((uint8_t)((uint16_t)(x) >> 8))
#define LSW(x) ((uint16_t)(x))
#define LSDW(x) ((u32)((u64)(x)))
#define MSDW(x) ((u32)((((u64)(x)) >> 16) >> 16))

/*
 * Retry & Timeout Values
 */
#define MBOX_TOV			60
#define SOFT_RESET_TOV			30
#define RESET_INTR_TOV			3
#define SEMAPHORE_TOV			10
#define ADAPTER_INIT_TOV		30
#define ADAPTER_RESET_TOV		180
#define EXTEND_CMD_TOV			60
#define WAIT_CMD_TOV			30
#define EH_WAIT_CMD_TOV			120
#define FIRMWARE_UP_TOV			60
#define RESET_FIRMWARE_TOV		30
#define LOGOUT_TOV			10
#define IOCB_TOV_MARGIN			10
#define RELOGIN_TOV			18
#define ISNS_DEREG_TOV			5
#define HBA_ONLINE_TOV			30
#define DISABLE_ACB_TOV			30
#define IP_CONFIG_TOV			30
#define LOGIN_TOV			12

#define MAX_RESET_HA_RETRIES		2
#define FW_ALIVE_WAIT_TOV		3

#define CMD_SP(Cmnd)			((Cmnd)->SCp.ptr)

/*
 * SCSI Request Block structure	 (srb)	that is placed
 * on cmd->SCp location of every I/O	 [We have 22 bytes available]
 */
struct srb {
	struct list_head list;	/* (8)	 */
	struct scsi_qla_host *ha;	/* HA the SP is queued on */
	struct ddb_entry *ddb;
	uint16_t flags;		/* (1) Status flags. */

#define SRB_DMA_VALID		BIT_3	/* DMA Buffer mapped. */
#define SRB_GOT_SENSE		BIT_4	/* sense data received. */
	uint8_t state;		/* (1) Status flags. */

#define SRB_NO_QUEUE_STATE	 0	/* Request is in between states */
#define SRB_FREE_STATE		 1
#define SRB_ACTIVE_STATE	 3
#define SRB_ACTIVE_TIMEOUT_STATE 4
#define SRB_SUSPENDED_STATE	 7	/* Request in suspended state */

	struct scsi_cmnd *cmd;	/* (4) SCSI command block */
	dma_addr_t dma_handle;	/* (4) for unmap of single transfers */
	struct kref srb_ref;	/* reference count for this srb */
	uint8_t err_id;		/* error id */
#define SRB_ERR_PORT	   1	/* Request failed because "port down" */
#define SRB_ERR_LOOP	   2	/* Request failed because "loop down" */
#define SRB_ERR_DEVICE	   3	/* Request failed because "device error" */
#define SRB_ERR_OTHER	   4

	uint16_t reserved;
	uint16_t iocb_tov;
	uint16_t iocb_cnt;	/* Number of used iocbs */
	uint16_t cc_stat;

	/* Used for extended sense / status continuation */
	uint8_t *req_sense_ptr;
	uint16_t req_sense_len;
	uint16_t reserved2;
};

/*
 * Asynchronous Event Queue structure
 */
struct aen {
        uint32_t mbox_sts[MBOX_AEN_REG_COUNT];
};

struct ql4_aen_log {
        int count;
        struct aen entry[MAX_AEN_ENTRIES];
};

/*
 * Device Database (DDB) structure
 */
struct ddb_entry {
	struct scsi_qla_host *ha;
	struct iscsi_cls_session *sess;
	struct iscsi_cls_conn *conn;

	uint16_t fw_ddb_index;	/* DDB firmware index */
	uint32_t fw_ddb_device_state; /* F/W Device State  -- see ql4_fw.h */
	uint16_t ddb_type;
#define FLASH_DDB 0x01

	struct dev_db_entry fw_ddb_entry;
	int (*unblock_sess)(struct iscsi_cls_session *cls_session);
	int (*ddb_change)(struct scsi_qla_host *ha, uint32_t fw_ddb_index,
			  struct ddb_entry *ddb_entry, uint32_t state);

	/* Driver Re-login  */
	unsigned long flags;		  /* DDB Flags */
	uint16_t default_relogin_timeout; /*  Max time to wait for
					   *  relogin to complete */
	atomic_t retry_relogin_timer;	  /* Min Time between relogins
					   * (4000 only) */
	atomic_t relogin_timer;		  /* Max Time to wait for
					   * relogin to complete */
	atomic_t relogin_retry_count;	  /* Num of times relogin has been
					   * retried */
	uint32_t default_time2wait;	  /* Default Min time between
					   * relogins (+aens) */

};

struct qla_ddb_index {
	struct list_head list;
	uint16_t fw_ddb_idx;
	struct dev_db_entry fw_ddb;
};

#define DDB_IPADDR_LEN 64

struct ql4_tuple_ddb {
	int port;
	int tpgt;
	char ip_addr[DDB_IPADDR_LEN];
	char iscsi_name[ISCSI_NAME_SIZE];
	uint16_t options;
#define DDB_OPT_IPV6 0x0e0e
#define DDB_OPT_IPV4 0x0f0f
};

/*
 * DDB states.
 */
#define DDB_STATE_DEAD		0	/* We can no longer talk to
					 * this device */
#define DDB_STATE_ONLINE	1	/* Device ready to accept
					 * commands */
#define DDB_STATE_MISSING	2	/* Device logged off, trying
					 * to re-login */

/*
 * DDB flags.
 */
#define DF_RELOGIN		0	/* Relogin to device */
#define DF_ISNS_DISCOVERED	2	/* Device was discovered via iSNS */
#define DF_FO_MASKED		3



struct ql82xx_hw_data {
	/* Offsets for flash/nvram access (set to ~0 if not used). */
	uint32_t flash_conf_off;
	uint32_t flash_data_off;

	uint32_t fdt_wrt_disable;
	uint32_t fdt_erase_cmd;
	uint32_t fdt_block_size;
	uint32_t fdt_unprotect_sec_cmd;
	uint32_t fdt_protect_sec_cmd;

	uint32_t flt_region_flt;
	uint32_t flt_region_fdt;
	uint32_t flt_region_boot;
	uint32_t flt_region_bootload;
	uint32_t flt_region_fw;

	uint32_t flt_iscsi_param;
	uint32_t flt_region_chap;
	uint32_t flt_chap_size;
};

struct qla4_8xxx_legacy_intr_set {
	uint32_t int_vec_bit;
	uint32_t tgt_status_reg;
	uint32_t tgt_mask_reg;