cam.h revision 195534
1/*- 2 * Data structures and definitions for the CAM system. 3 * 4 * Copyright (c) 1997 Justin T. Gibbs. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions, and the following disclaimer, 12 * without modification, immediately at the beginning of the file. 13 * 2. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 20 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD: head/sys/cam/cam.h 195534 2009-07-10 08:18:08Z scottl $ 29 */ 30 31#ifndef _CAM_CAM_H 32#define _CAM_CAM_H 1 33 34#ifdef _KERNEL 35#include <opt_cam.h> 36#endif 37 38#include <sys/cdefs.h> 39 40typedef u_int path_id_t; 41typedef u_int target_id_t; 42typedef u_int lun_id_t; 43 44#define CAM_XPT_PATH_ID ((path_id_t)~0) 45#define CAM_BUS_WILDCARD ((path_id_t)~0) 46#define CAM_TARGET_WILDCARD ((target_id_t)~0) 47#define CAM_LUN_WILDCARD ((lun_id_t)~0) 48 49/* 50 * Maximum length for a CAM CDB. 51 */ 52#define CAM_MAX_CDBLEN 16 53 54/* 55 * Definition of a CAM peripheral driver entry. Peripheral drivers instantiate 56 * one of these for each device they wish to communicate with and pass it into 57 * the xpt layer when they wish to schedule work on that device via the 58 * xpt_schedule API. 59 */ 60struct cam_periph; 61 62/* 63 * Priority information for a CAM structure. The generation number is 64 * incremented everytime a new entry is entered into the queue giving round 65 * robin per priority level scheduling. 66 */ 67typedef struct { 68 u_int32_t priority; 69#define CAM_PRIORITY_NONE (u_int32_t)-1 70 u_int32_t generation; 71 int index; 72#define CAM_UNQUEUED_INDEX -1 73#define CAM_ACTIVE_INDEX -2 74#define CAM_DONEQ_INDEX -3 75} cam_pinfo; 76 77/* 78 * Macro to compare two generation numbers. It is used like this: 79 * 80 * if (GENERATIONCMP(a, >=, b)) 81 * ...; 82 * 83 * GERERATIONCMP uses modular arithmetic to guard against wraps 84 * wraps in the generation number. 85 */ 86#define GENERATIONCMP(x, op, y) ((int32_t)((x) - (y)) op 0) 87 88/* CAM flags XXX Move to cam_periph.h ??? */ 89typedef enum { 90 CAM_FLAG_NONE = 0x00, 91 CAM_EXPECT_INQ_CHANGE = 0x01, 92 CAM_RETRY_SELTO = 0x02 /* Retry Selection Timeouts */ 93} cam_flags; 94 95/* CAM Status field values */ 96typedef enum { 97 CAM_REQ_INPROG, /* CCB request is in progress */ 98 CAM_REQ_CMP, /* CCB request completed without error */ 99 CAM_REQ_ABORTED, /* CCB request aborted by the host */ 100 CAM_UA_ABORT, /* Unable to abort CCB request */ 101 CAM_REQ_CMP_ERR, /* CCB request completed with an error */ 102 CAM_BUSY, /* CAM subsystem is busy */ 103 CAM_REQ_INVALID, /* CCB request was invalid */ 104 CAM_PATH_INVALID, /* Supplied Path ID is invalid */ 105 CAM_DEV_NOT_THERE, /* SCSI Device Not Installed/there */ 106 CAM_UA_TERMIO, /* Unable to terminate I/O CCB request */ 107 CAM_SEL_TIMEOUT, /* Target Selection Timeout */ 108 CAM_CMD_TIMEOUT, /* Command timeout */ 109 CAM_SCSI_STATUS_ERROR, /* SCSI error, look at error code in CCB */ 110 CAM_MSG_REJECT_REC, /* Message Reject Received */ 111 CAM_SCSI_BUS_RESET, /* SCSI Bus Reset Sent/Received */ 112 CAM_UNCOR_PARITY, /* Uncorrectable parity error occurred */ 113 CAM_AUTOSENSE_FAIL = 0x10,/* Autosense: request sense cmd fail */ 114 CAM_NO_HBA, /* No HBA Detected error */ 115 CAM_DATA_RUN_ERR, /* Data Overrun error */ 116 CAM_UNEXP_BUSFREE, /* Unexpected Bus Free */ 117 CAM_SEQUENCE_FAIL, /* Target Bus Phase Sequence Failure */ 118 CAM_CCB_LEN_ERR, /* CCB length supplied is inadequate */ 119 CAM_PROVIDE_FAIL, /* Unable to provide requested capability */ 120 CAM_BDR_SENT, /* A SCSI BDR msg was sent to target */ 121 CAM_REQ_TERMIO, /* CCB request terminated by the host */ 122 CAM_UNREC_HBA_ERROR, /* Unrecoverable Host Bus Adapter Error */ 123 CAM_REQ_TOO_BIG, /* The request was too large for this host */ 124 CAM_REQUEUE_REQ, /* 125 * This request should be requeued to preserve 126 * transaction ordering. This typically occurs 127 * when the SIM recognizes an error that should 128 * freeze the queue and must place additional 129 * requests for the target at the sim level 130 * back into the XPT queue. 131 */ 132 CAM_ATA_STATUS_ERROR, /* ATA error, look at error code in CCB */ 133 CAM_SCSI_IT_NEXUS_LOST, /* Initiator/Target Nexus lost. */ 134 CAM_IDE = 0x33, /* Initiator Detected Error */ 135 CAM_RESRC_UNAVAIL, /* Resource Unavailable */ 136 CAM_UNACKED_EVENT, /* Unacknowledged Event by Host */ 137 CAM_MESSAGE_RECV, /* Message Received in Host Target Mode */ 138 CAM_INVALID_CDB, /* Invalid CDB received in Host Target Mode */ 139 CAM_LUN_INVALID, /* Lun supplied is invalid */ 140 CAM_TID_INVALID, /* Target ID supplied is invalid */ 141 CAM_FUNC_NOTAVAIL, /* The requested function is not available */ 142 CAM_NO_NEXUS, /* Nexus is not established */ 143 CAM_IID_INVALID, /* The initiator ID is invalid */ 144 CAM_CDB_RECVD, /* The SCSI CDB has been received */ 145 CAM_LUN_ALRDY_ENA, /* The LUN is already enabled for target mode */ 146 CAM_SCSI_BUSY, /* SCSI Bus Busy */ 147 148 CAM_DEV_QFRZN = 0x40, /* The DEV queue is frozen w/this err */ 149 150 /* Autosense data valid for target */ 151 CAM_AUTOSNS_VALID = 0x80, 152 CAM_RELEASE_SIMQ = 0x100,/* SIM ready to take more commands */ 153 CAM_SIM_QUEUED = 0x200,/* SIM has this command in it's queue */ 154 155 CAM_STATUS_MASK = 0x3F, /* Mask bits for just the status # */ 156 157 /* Target Specific Adjunct Status */ 158 CAM_SENT_SENSE = 0x40000000 /* sent sense with status */ 159} cam_status; 160 161typedef enum { 162 CAM_ESF_NONE = 0x00, 163 CAM_ESF_COMMAND = 0x01, 164 CAM_ESF_CAM_STATUS = 0x02, 165 CAM_ESF_PROTO_STATUS = 0x04, 166 CAM_ESF_ALL = 0xff 167} cam_error_string_flags; 168 169typedef enum { 170 CAM_EPF_NONE = 0x00, 171 CAM_EPF_MINIMAL = 0x01, 172 CAM_EPF_NORMAL = 0x02, 173 CAM_EPF_ALL = 0x03, 174 CAM_EPF_LEVEL_MASK = 0x0f 175 /* All bits above bit 3 are protocol-specific */ 176} cam_error_proto_flags; 177 178typedef enum { 179 CAM_ESF_PRINT_NONE = 0x00, 180 CAM_ESF_PRINT_STATUS = 0x10, 181 CAM_ESF_PRINT_SENSE = 0x20 182} cam_error_scsi_flags; 183 184struct cam_status_entry 185{ 186 cam_status status_code; 187 const char *status_text; 188}; 189 190extern const struct cam_status_entry cam_status_table[]; 191extern const int num_cam_status_entries; 192union ccb; 193 194#ifdef SYSCTL_DECL /* from sysctl.h */ 195SYSCTL_DECL(_kern_cam); 196#endif 197 198__BEGIN_DECLS 199typedef int (cam_quirkmatch_t)(caddr_t, caddr_t); 200 201caddr_t cam_quirkmatch(caddr_t target, caddr_t quirk_table, int num_entries, 202 int entry_size, cam_quirkmatch_t *comp_func); 203 204void cam_strvis(u_int8_t *dst, const u_int8_t *src, int srclen, int dstlen); 205 206int cam_strmatch(const u_int8_t *str, const u_int8_t *pattern, int str_len); 207const struct cam_status_entry* 208 cam_fetch_status_entry(cam_status status); 209#ifdef _KERNEL 210char * cam_error_string(union ccb *ccb, char *str, int str_len, 211 cam_error_string_flags flags, 212 cam_error_proto_flags proto_flags); 213void cam_error_print(union ccb *ccb, cam_error_string_flags flags, 214 cam_error_proto_flags proto_flags); 215#else /* _KERNEL */ 216struct cam_device; 217 218char * cam_error_string(struct cam_device *device, union ccb *ccb, char *str, 219 int str_len, cam_error_string_flags flags, 220 cam_error_proto_flags proto_flags); 221void cam_error_print(struct cam_device *device, union ccb *ccb, 222 cam_error_string_flags flags, 223 cam_error_proto_flags proto_flags, FILE *ofile); 224#endif /* _KERNEL */ 225__END_DECLS 226 227#ifdef _KERNEL 228static __inline void cam_init_pinfo(cam_pinfo *pinfo); 229 230static __inline void cam_init_pinfo(cam_pinfo *pinfo) 231{ 232 pinfo->priority = CAM_PRIORITY_NONE; 233 pinfo->index = CAM_UNQUEUED_INDEX; 234} 235#endif 236 237#endif /* _CAM_CAM_H */ 238