path: root/drivers/scsi/qla2xxx/qla_target.h

/*
 *  Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net>
 *  Copyright (C) 2004 - 2005 Leonid Stoljar
 *  Copyright (C) 2006 Nathaniel Clark <nate@misrule.us>
 *  Copyright (C) 2007 - 2010 ID7 Ltd.
 *
 *  Forward port and refactoring to modern qla2xxx and target/configfs
 *
 *  Copyright (C) 2010-2011 Nicholas A. Bellinger <nab@kernel.org>
 *
 *  Additional file for the target driver support.
 *
 *  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.
 */
/*
 * This is the global def file that is useful for including from the
 * target portion.
 */

#ifndef __QLA_TARGET_H
#define __QLA_TARGET_H

#include "qla_def.h"

/*
 * Must be changed on any change in any initiator visible interfaces or
 * data in the target add-on
 */
#define QLA2XXX_TARGET_MAGIC	269

/*
 * Must be changed on any change in any target visible interfaces or
 * data in the initiator
 */
#define QLA2XXX_INITIATOR_MAGIC   57222

#define QLA2XXX_INI_MODE_STR_EXCLUSIVE	"exclusive"
#define QLA2XXX_INI_MODE_STR_DISABLED	"disabled"
#define QLA2XXX_INI_MODE_STR_ENABLED	"enabled"

#define QLA2XXX_INI_MODE_EXCLUSIVE	0
#define QLA2XXX_INI_MODE_DISABLED	1
#define QLA2XXX_INI_MODE_ENABLED	2

#define QLA2XXX_COMMAND_COUNT_INIT	250
#define QLA2XXX_IMMED_NOTIFY_COUNT_INIT 250

/*
 * Used to mark which completion handles (for RIO Status's) are for CTIO's
 * vs. regular (non-target) info. This is checked for in
 * qla2x00_process_response_queue() to see if a handle coming back in a
 * multi-complete should come to the tgt driver or be handled there by qla2xxx
 */
#define CTIO_COMPLETION_HANDLE_MARK	BIT_29
#if (CTIO_COMPLETION_HANDLE_MARK <= DEFAULT_OUTSTANDING_COMMANDS)
#error "CTIO_COMPLETION_HANDLE_MARK not larger than "
	"DEFAULT_OUTSTANDING_COMMANDS"
#endif
#define HANDLE_IS_CTIO_COMP(h) (h & CTIO_COMPLETION_HANDLE_MARK)

/* Used to mark CTIO as intermediate */
#define CTIO_INTERMEDIATE_HANDLE_MARK	BIT_30

#ifndef OF_SS_MODE_0
/*
 * ISP target entries - Flags bit definitions.
 */
#define OF_SS_MODE_0        0
#define OF_SS_MODE_1        1
#define OF_SS_MODE_2        2
#define OF_SS_MODE_3        3

#define OF_EXPL_CONF        BIT_5       /* Explicit Confirmation Requested */
#define OF_DATA_IN          BIT_6       /* Data in to initiator */
					/*  (data from target to initiator) */
#define OF_DATA_OUT         BIT_7       /* Data out from initiator */
					/*  (data from initiator to target) */
#define OF_NO_DATA          (BIT_7 | BIT_6)
#define OF_INC_RC           BIT_8       /* Increment command resource count */
#define OF_FAST_POST        BIT_9       /* Enable mailbox fast posting. */
#define OF_CONF_REQ         BIT_13      /* Confirmation Requested */
#define OF_TERM_EXCH        BIT_14      /* Terminate exchange */
#define OF_SSTS             BIT_15      /* Send SCSI status */
#endif

#ifndef QLA_TGT_DATASEGS_PER_CMD32
#define QLA_TGT_DATASEGS_PER_CMD32	3
#define QLA_TGT_DATASEGS_PER_CONT32	7
#define QLA_TGT_MAX_SG32(ql) \
	(((ql) > 0) ? (QLA_TGT_DATASEGS_PER_CMD32 + \
		QLA_TGT_DATASEGS_PER_CONT32*((ql) - 1)) : 0)

#define QLA_TGT_DATASEGS_PER_CMD64	2
#define QLA_TGT_DATASEGS_PER_CONT64	5
#define QLA_TGT_MAX_SG64(ql) \
	(((ql) > 0) ? (QLA_TGT_DATASEGS_PER_CMD64 + \
		QLA_TGT_DATASEGS_PER_CONT64*((ql) - 1)) : 0)
#endif

#ifndef QLA_TGT_DATASEGS_PER_CMD_24XX
#define QLA_TGT_DATASEGS_PER_CMD_24XX	1
#define QLA_TGT_DATASEGS_PER_CONT_24XX	5
#define QLA_TGT_MAX_SG_24XX(ql) \
	(min(1270, ((ql) > 0) ? (QLA_TGT_DATASEGS_PER_CMD_24XX + \
		QLA_TGT_DATASEGS_PER_CONT_24XX*((ql) - 1)) : 0))
#endif
#endif

#define GET_TARGET_ID(ha, iocb) ((HAS_EXTENDED_IDS(ha))			\
			 ? le16_to_cpu((iocb)->u.isp2x.target.extended)	\
			 : (uint16_t)(iocb)->u.isp2x.target.id.standard)

#ifndef IMMED_NOTIFY_TYPE
#define IMMED_NOTIFY_TYPE 0x0D		/* Immediate notify entry. */
/*
 * ISP queue -	immediate notify entry structure definition.
 *		This is sent by the ISP to the Target driver.
 *		This IOCB would have report of events sent by the
 *		initiator, that needs to be handled by the target
 *		driver immediately.
 */
struct imm_ntfy_from_isp {
	uint8_t	 entry_type;		    /* Entry type. */
	uint8_t	 entry_count;		    /* Entry count. */
	uint8_t	 sys_define;		    /* System defined. */
	uint8_t	 entry_status;		    /* Entry Status. */
	union {
		struct {
			uint32_t sys_define_2; /* System defined. */
			target_id_t target;
			uint16_t lun;
			uint8_t  target_id;
			uint8_t  reserved_1;
			uint16_t status_modifier;
			uint16_t status;
			uint16_t task_flags;
			uint16_t seq_id;
			uint16_t srr_rx_id;
			uint32_t srr_rel_offs;
			uint16_t srr_ui;
#define SRR_IU_DATA_IN	0x1
#define SRR_IU_DATA_OUT	0x5
#define SRR_IU_STATUS	0x7
			uint16_t srr_ox_id;
			uint8_t reserved_2[28];
		} isp2x;
		struct {
			uint32_t reserved;
			uint16_t nport_handle;
			uint16_t reserved_2;
			uint16_t flags;
#define NOTIFY24XX_FLAGS_GLOBAL_TPRLO   BIT_1
#define NOTIFY24XX_FLAGS_PUREX_IOCB     BIT_0
			uint16_t srr_rx_id;
			uint16_t status;
			uint8_t  status_subcode;
			uint8_t  fw_handle;
			uint32_t exchange_address;
			uint32_t srr_rel_offs;
			uint16_t srr_ui;
			uint16_t srr_ox_id;
			uint8_t  reserved_4[19];
			uint8_t  vp_index;
			uint32_t reserved_5;
			uint8_t  port_id[3];
			uint8_t  reserved_6;
		} isp24;
	} u;
	uint16_t reserved_7;
	uint16_t ox_id;
} __packed;
#endif

#ifndef NOTIFY_ACK_TYPE
#define NOTIFY_ACK_TYPE 0x0E	  /* Notify acknowledge entry. */
/*
 * ISP queue -	notify acknowledge entry structure definition.
 *		This is sent to the ISP from the target driver.
 */
struct nack_to_isp {
	uint8_t	 entry_type;		    /* Entry type. */
	uint8_t	 entry_count;		    /* Entry count. */
	uint8_t	 sys_define;		    /* System defined. */
	uint8_t	 entry_status;		    /* Entry Status. */
	union {
		struct {
			uint32_t sys_define_2; /* System defined. */
			target_id_t target;
			uint8_t	 target_id;
			uint8_t	 reserved_1;
			uint16_t flags;
			uint16_t resp_code;
			uint16_t status;
			uint16_t task_flags;
			uint16_t seq_id;
			uint16_t srr_rx_id;
			uint32_t srr_rel_offs;
			uint16_t srr_ui;
			uint16_t srr_flags;
			uint16_t srr_reject_code;
			uint8_t  srr_reject_vendor_uniq;
			uint8_t  srr_reject_code_expl;
			uint8_t  reserved_2[24];
		} isp2x;
		struct {
			uint32_t handle;
			uint16_t nport_handle;
			uint16_t reserved_1;
			uint16_t flags;
			uint16_t srr_rx_id;
			uint16_t status;
			uint8_t  status_subcode;
			uint8_t  fw_handle;
			uint32_t exchange_address;
			uint32_t srr_rel_offs;
			uint16_t srr_ui;
			uint16_t srr_flags;
			uint8_t  reserved_4[19];
			uint8_t  vp_index;
			uint8_t  srr_reject_vendor_uniq;
			uint8_t  srr_reject_code_expl;
			uint8_t  srr_reject_code;
			uint8_t  reserved_5[5];
		} isp24;
	} u;
	uint8_t  reserved[2];
	uint16_t ox_id;
} __packed;
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