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freebsd-skq/sys/cam/cam.h
bdrewery 30f99dbeef Fix improper use of "its". 
Sponsored by:	Dell EMC Isilon
2016-11-08 23:59:41 +00:00

414 lines
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/*-
* Data structures and definitions for the CAM system.
*
* Copyright (c) 1997 Justin T. Gibbs.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification, immediately at the beginning of the file.
* 2. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _CAM_CAM_H
#define _CAM_CAM_H 1
#ifdef _KERNEL
#include <opt_cam.h>
#endif
#include <sys/cdefs.h>
typedef u_int path_id_t;
typedef u_int target_id_t;
typedef u_int64_t lun_id_t;
#define CAM_XPT_PATH_ID ((path_id_t)~0)
#define CAM_BUS_WILDCARD ((path_id_t)~0)
#define CAM_TARGET_WILDCARD ((target_id_t)~0)
#define CAM_LUN_WILDCARD (~(u_int)0)
#define CAM_EXTLUN_BYTE_SWIZZLE(lun) ( \
((((u_int64_t)lun) & 0xffff000000000000L) >> 48) | \
((((u_int64_t)lun) & 0x0000ffff00000000L) >> 16) | \
((((u_int64_t)lun) & 0x00000000ffff0000L) << 16) | \
((((u_int64_t)lun) & 0x000000000000ffffL) << 48))
/*
* Maximum length for a CAM CDB.
*/
#define CAM_MAX_CDBLEN 16
/*
* Definition of a CAM peripheral driver entry. Peripheral drivers instantiate
* one of these for each device they wish to communicate with and pass it into
* the xpt layer when they wish to schedule work on that device via the
* xpt_schedule API.
*/
struct cam_periph;
/*
* Priority information for a CAM structure.
*/
typedef enum {
CAM_RL_HOST,
CAM_RL_BUS,
CAM_RL_XPT,
CAM_RL_DEV,
CAM_RL_NORMAL,
CAM_RL_VALUES
} cam_rl;
/*
* The generation number is incremented every time a new entry is entered into
* the queue giving round robin per priority level scheduling.
*/
typedef struct {
u_int32_t priority;
#define CAM_PRIORITY_HOST ((CAM_RL_HOST << 8) + 0x80)
#define CAM_PRIORITY_BUS ((CAM_RL_BUS << 8) + 0x80)
#define CAM_PRIORITY_XPT ((CAM_RL_XPT << 8) + 0x80)
#define CAM_PRIORITY_DEV ((CAM_RL_DEV << 8) + 0x80)
#define CAM_PRIORITY_OOB (CAM_RL_DEV << 8)
#define CAM_PRIORITY_NORMAL ((CAM_RL_NORMAL << 8) + 0x80)
#define CAM_PRIORITY_NONE (u_int32_t)-1
u_int32_t generation;
int index;
#define CAM_UNQUEUED_INDEX -1
#define CAM_ACTIVE_INDEX -2
#define CAM_DONEQ_INDEX -3
#define CAM_EXTRAQ_INDEX INT_MAX
} cam_pinfo;
/*
* Macro to compare two generation numbers. It is used like this:
*
* if (GENERATIONCMP(a, >=, b))
* ...;
*
* GERERATIONCMP uses modular arithmetic to guard against wraps
* wraps in the generation number.
*/
#define GENERATIONCMP(x, op, y) ((int32_t)((x) - (y)) op 0)
/* CAM flags XXX Move to cam_periph.h ??? */
typedef enum {
CAM_FLAG_NONE = 0x00,
CAM_EXPECT_INQ_CHANGE = 0x01,
CAM_RETRY_SELTO = 0x02 /* Retry Selection Timeouts */
} cam_flags;
enum {
SF_RETRY_UA = 0x01, /* Retry UNIT ATTENTION conditions. */
SF_NO_PRINT = 0x02, /* Never print error status. */
SF_QUIET_IR = 0x04, /* Be quiet about Illegal Request responses */
SF_PRINT_ALWAYS = 0x08, /* Always print error status. */
SF_NO_RECOVERY = 0x10, /* Don't do active error recovery. */
SF_NO_RETRY = 0x20, /* Don't do any retries. */
SF_RETRY_BUSY = 0x40 /* Retry BUSY status. */
};
/* CAM Status field values */
typedef enum {
/* CCB request is in progress */
CAM_REQ_INPROG = 0x00,
/* CCB request completed without error */
CAM_REQ_CMP = 0x01,
/* CCB request aborted by the host */
CAM_REQ_ABORTED = 0x02,
/* Unable to abort CCB request */
CAM_UA_ABORT = 0x03,
/* CCB request completed with an error */
CAM_REQ_CMP_ERR = 0x04,
/* CAM subsystem is busy */
CAM_BUSY = 0x05,
/* CCB request was invalid */
CAM_REQ_INVALID = 0x06,
/* Supplied Path ID is invalid */
CAM_PATH_INVALID = 0x07,
/* SCSI Device Not Installed/there */
CAM_DEV_NOT_THERE = 0x08,
/* Unable to terminate I/O CCB request */
CAM_UA_TERMIO = 0x09,
/* Target Selection Timeout */
CAM_SEL_TIMEOUT = 0x0a,
/* Command timeout */
CAM_CMD_TIMEOUT = 0x0b,
/* SCSI error, look at error code in CCB */
CAM_SCSI_STATUS_ERROR = 0x0c,
/* Message Reject Received */
CAM_MSG_REJECT_REC = 0x0d,
/* SCSI Bus Reset Sent/Received */
CAM_SCSI_BUS_RESET = 0x0e,
/* Uncorrectable parity error occurred */
CAM_UNCOR_PARITY = 0x0f,
/* Autosense: request sense cmd fail */
CAM_AUTOSENSE_FAIL = 0x10,
/* No HBA Detected error */
CAM_NO_HBA = 0x11,
/* Data Overrun error */
CAM_DATA_RUN_ERR = 0x12,
/* Unexpected Bus Free */
CAM_UNEXP_BUSFREE = 0x13,
/* Target Bus Phase Sequence Failure */
CAM_SEQUENCE_FAIL = 0x14,
/* CCB length supplied is inadequate */
CAM_CCB_LEN_ERR = 0x15,
/* Unable to provide requested capability*/
CAM_PROVIDE_FAIL = 0x16,
/* A SCSI BDR msg was sent to target */
CAM_BDR_SENT = 0x17,
/* CCB request terminated by the host */
CAM_REQ_TERMIO = 0x18,
/* Unrecoverable Host Bus Adapter Error */
CAM_UNREC_HBA_ERROR = 0x19,
/* Request was too large for this host */
CAM_REQ_TOO_BIG = 0x1a,
/*
* This request should be requeued to preserve
* transaction ordering. This typically occurs
* when the SIM recognizes an error that should
* freeze the queue and must place additional
* requests for the target at the sim level
* back into the XPT queue.
*/
CAM_REQUEUE_REQ = 0x1b,
/* ATA error, look at error code in CCB */
CAM_ATA_STATUS_ERROR = 0x1c,
/* Initiator/Target Nexus lost. */
CAM_SCSI_IT_NEXUS_LOST = 0x1d,
/* SMP error, look at error code in CCB */
CAM_SMP_STATUS_ERROR = 0x1e,
/*
* Command completed without error but exceeded the soft
* timeout threshold.
*/
CAM_REQ_SOFTTIMEOUT = 0x1f,
/*
* 0x20 - 0x32 are unassigned
*/
/* Initiator Detected Error */
CAM_IDE = 0x33,
/* Resource Unavailable */
CAM_RESRC_UNAVAIL = 0x34,
/* Unacknowledged Event by Host */
CAM_UNACKED_EVENT = 0x35,
/* Message Received in Host Target Mode */
CAM_MESSAGE_RECV = 0x36,
/* Invalid CDB received in Host Target Mode */
CAM_INVALID_CDB = 0x37,
/* Lun supplied is invalid */
CAM_LUN_INVALID = 0x38,
/* Target ID supplied is invalid */
CAM_TID_INVALID = 0x39,
/* The requested function is not available */
CAM_FUNC_NOTAVAIL = 0x3a,
/* Nexus is not established */
CAM_NO_NEXUS = 0x3b,
/* The initiator ID is invalid */
CAM_IID_INVALID = 0x3c,
/* The SCSI CDB has been received */
CAM_CDB_RECVD = 0x3d,
/* The LUN is already enabled for target mode */
CAM_LUN_ALRDY_ENA = 0x3e,
/* SCSI Bus Busy */
CAM_SCSI_BUSY = 0x3f,
/*
* Flags
*/
/* The DEV queue is frozen w/this err */
CAM_DEV_QFRZN = 0x40,
/* Autosense data valid for target */
CAM_AUTOSNS_VALID = 0x80,
/* SIM ready to take more commands */
CAM_RELEASE_SIMQ = 0x100,
/* SIM has this command in its queue */
CAM_SIM_QUEUED = 0x200,
/* Quality of service data is valid */
CAM_QOS_VALID = 0x400,
/* Mask bits for just the status # */
CAM_STATUS_MASK = 0x3F,
/*
* Target Specific Adjunct Status
*/
/* sent sense with status */
CAM_SENT_SENSE = 0x40000000
} cam_status;
typedef enum {
CAM_ESF_NONE = 0x00,
CAM_ESF_COMMAND = 0x01,
CAM_ESF_CAM_STATUS = 0x02,
CAM_ESF_PROTO_STATUS = 0x04,
CAM_ESF_ALL = 0xff
} cam_error_string_flags;
typedef enum {
CAM_EPF_NONE = 0x00,
CAM_EPF_MINIMAL = 0x01,
CAM_EPF_NORMAL = 0x02,
CAM_EPF_ALL = 0x03,
CAM_EPF_LEVEL_MASK = 0x0f
/* All bits above bit 3 are protocol-specific */
} cam_error_proto_flags;
typedef enum {
CAM_ESF_PRINT_NONE = 0x00,
CAM_ESF_PRINT_STATUS = 0x10,
CAM_ESF_PRINT_SENSE = 0x20
} cam_error_scsi_flags;
typedef enum {
CAM_ESMF_PRINT_NONE = 0x00,
CAM_ESMF_PRINT_STATUS = 0x10,
CAM_ESMF_PRINT_FULL_CMD = 0x20,
} cam_error_smp_flags;
typedef enum {
CAM_EAF_PRINT_NONE = 0x00,
CAM_EAF_PRINT_STATUS = 0x10,
CAM_EAF_PRINT_RESULT = 0x20
} cam_error_ata_flags;
typedef enum {
CAM_STRVIS_FLAG_NONE = 0x00,
CAM_STRVIS_FLAG_NONASCII_MASK = 0x03,
CAM_STRVIS_FLAG_NONASCII_TRIM = 0x00,
CAM_STRVIS_FLAG_NONASCII_RAW = 0x01,
CAM_STRVIS_FLAG_NONASCII_SPC = 0x02,
CAM_STRVIS_FLAG_NONASCII_ESC = 0x03
} cam_strvis_flags;
struct cam_status_entry
{
cam_status status_code;
const char *status_text;
};
extern const struct cam_status_entry cam_status_table[];
extern const int num_cam_status_entries;
#ifdef _KERNEL
extern int cam_sort_io_queues;
#endif
union ccb;
struct sbuf;
#ifdef SYSCTL_DECL /* from sysctl.h */
SYSCTL_DECL(_kern_cam);
#endif
__BEGIN_DECLS
typedef int (cam_quirkmatch_t)(caddr_t, caddr_t);
caddr_t cam_quirkmatch(caddr_t target, caddr_t quirk_table, int num_entries,
int entry_size, cam_quirkmatch_t *comp_func);
void cam_strvis(u_int8_t *dst, const u_int8_t *src, int srclen, int dstlen);
void cam_strvis_sbuf(struct sbuf *sb, const u_int8_t *src, int srclen,
uint32_t flags);
int cam_strmatch(const u_int8_t *str, const u_int8_t *pattern, int str_len);
const struct cam_status_entry*
cam_fetch_status_entry(cam_status status);
#ifdef _KERNEL
char * cam_error_string(union ccb *ccb, char *str, int str_len,
cam_error_string_flags flags,
cam_error_proto_flags proto_flags);
void cam_error_print(union ccb *ccb, cam_error_string_flags flags,
cam_error_proto_flags proto_flags);
#else /* _KERNEL */
struct cam_device;
char * cam_error_string(struct cam_device *device, union ccb *ccb, char *str,
int str_len, cam_error_string_flags flags,
cam_error_proto_flags proto_flags);
void cam_error_print(struct cam_device *device, union ccb *ccb,
cam_error_string_flags flags,
cam_error_proto_flags proto_flags, FILE *ofile);
#endif /* _KERNEL */
__END_DECLS
#ifdef _KERNEL
static __inline void cam_init_pinfo(cam_pinfo *pinfo);
static __inline void cam_init_pinfo(cam_pinfo *pinfo)
{
pinfo->priority = CAM_PRIORITY_NONE;
pinfo->index = CAM_UNQUEUED_INDEX;
}
#endif
#endif /* _CAM_CAM_H */
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