sys/bus/cam/cam.h

   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: src/sys/cam/cam.h,v 1.6.2.1 2000/03/17 22:36:21 peter Exp $
  29  */
  30
  31 #ifndef _BUS_CAM_CAM_H_
  32 #define _BUS_CAM_CAM_H_ 1
  33
  34 #ifdef _KERNEL
  35 #include <opt_cam.h>
  36 #include <sys/sysctl.h>
  37 #endif
  38
  39 #include <sys/cdefs.h>
  40
  41 typedef u_int path_id_t;
  42 typedef u_int target_id_t;
  43 typedef u_int lun_id_t;
  44
  45 #define CAM_XPT_PATH_ID ((path_id_t)~0)
  46 #define CAM_BUS_WILDCARD ((path_id_t)~0)
  47 #define CAM_TARGET_WILDCARD ((target_id_t)~0)
  48 #define CAM_LUN_WILDCARD ((lun_id_t)~0)
  49
  50 /*
  51  * Maximum length for a CAM CDB.
  52  */
  53 #define CAM_MAX_CDBLEN 16
  54
  55 /*
  56  * Definition of a CAM peripheral driver entry.  Peripheral drivers instantiate
  57  * one of these for each device they wish to communicate with and pass it into
  58  * the xpt layer when they wish to schedule work on that device via the
  59  * xpt_schedule API.
  60  */
  61 struct cam_periph;
  62
  63 /*
  64  * Priority information for a CAM structure.  The generation number is
  65  * incremented everytime a new entry is entered into the queue giving round
  66  * robin per priority level scheduling.
  67  */
  68 typedef struct {
  69         u_int32_t priority;
  70 #define CAM_PRIORITY_NONE       (u_int32_t)-1
  71         u_int32_t generation;
  72         int       index;
  73 #define CAM_UNQUEUED_INDEX      -1
  74 #define CAM_ACTIVE_INDEX        -2
  75 #define CAM_DONEQ_INDEX         -3
  76 } cam_pinfo;
  77
  78 /*
  79  * Macro to compare two generation numbers.  It is used like this:
  80  *
  81  *      if (GENERATIONCMP(a, >=, b))
  82  *              ...;
  83  *
  84  * GERERATIONCMP uses modular arithmetic to guard against wraps
  85  * wraps in the generation number.
  86  */
  87 #define GENERATIONCMP(x, op, y) ((int32_t)((x) - (y)) op 0)
  88
  89 /* CAM flags XXX Move to cam_periph.h ??? */
  90 typedef enum {
  91         CAM_FLAG_NONE           = 0x00,
  92         CAM_EXPECT_INQ_CHANGE   = 0x01,
  93         CAM_RETRY_SELTO         = 0x02 /* Retry Selection Timeouts */
  94 } cam_flags;
  95
  96 /* CAM  Status field values */
  97 typedef enum {
  98         CAM_REQ_INPROG,         /* CCB request is in progress */
  99         CAM_REQ_CMP,            /* CCB request completed without error */
 100         CAM_REQ_ABORTED,        /* CCB request aborted by the host */
 101         CAM_UA_ABORT,           /* Unable to abort CCB request */
 102         CAM_REQ_CMP_ERR,        /* CCB request completed with an error */
 103         CAM_BUSY,               /* CAM subsystem is busy */
 104         CAM_REQ_INVALID,        /* CCB request was invalid */
 105         CAM_PATH_INVALID,       /* Supplied Path ID is invalid */
 106         CAM_DEV_NOT_THERE,      /* SCSI Device Not Installed/there */
 107         CAM_UA_TERMIO,          /* Unable to terminate I/O CCB request */
 108         CAM_SEL_TIMEOUT,        /* Target Selection Timeout */
 109         CAM_CMD_TIMEOUT,        /* Command timeout */
 110         CAM_SCSI_STATUS_ERROR,  /* SCSI error, look at error code in CCB */
 111         CAM_MSG_REJECT_REC,     /* Message Reject Received */
 112         CAM_SCSI_BUS_RESET,     /* SCSI Bus Reset Sent/Received */
 113         CAM_UNCOR_PARITY,       /* Uncorrectable parity error occurred */
 114         CAM_AUTOSENSE_FAIL = 0x10,/* Autosense: request sense cmd fail */
 115         CAM_NO_HBA,             /* No HBA Detected error */
 116         CAM_DATA_RUN_ERR,       /* Data Overrun error */
 117         CAM_UNEXP_BUSFREE,      /* Unexpected Bus Free */
 118         CAM_SEQUENCE_FAIL,      /* Target Bus Phase Sequence Failure */
 119         CAM_CCB_LEN_ERR,        /* CCB length supplied is inadequate */
 120         CAM_PROVIDE_FAIL,       /* Unable to provide requested capability */
 121         CAM_BDR_SENT,           /* A SCSI BDR msg was sent to target */
 122         CAM_REQ_TERMIO,         /* CCB request terminated by the host */
 123         CAM_UNREC_HBA_ERROR,    /* Unrecoverable Host Bus Adapter Error */
 124         CAM_REQ_TOO_BIG,        /* The request was too large for this host */
 125         CAM_REQUEUE_REQ,        /*
 126                                  * This request should be requeued to preserve
 127                                  * transaction ordering.  This typically occurs
 128                                  * when the SIM recognizes an error that should
 129                                  * freeze the queue and must place additional
 130                                  * requests for the target at the sim level
 131                                  * back into the XPT queue.
 132                                  */
 133         CAM_SCSI_IT_NEXUS_LOST  = 0x1d,/* 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
 161 typedef 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
 169 typedef 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
 178 typedef 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
 184 struct cam_status_entry
 185 {
 186         cam_status  status_code;
 187         const char *status_text;
 188 };
 189
 190 extern const struct cam_status_entry cam_status_table[];
 191 extern const int num_cam_status_entries;
 192 union ccb;
 193
 194 __BEGIN_DECLS
 195 typedef int (cam_quirkmatch_t)(caddr_t, caddr_t);
 196
 197 caddr_t cam_quirkmatch(caddr_t target, caddr_t quirk_table, int num_entries,
 198                        int entry_size, cam_quirkmatch_t *comp_func);
 199
 200 void    cam_strvis(u_int8_t *dst, const u_int8_t *src, int srclen, int dstlen);
 201
 202 int     cam_strmatch(const u_int8_t *str, const u_int8_t *pattern, int str_len);
 203 const struct cam_status_entry*
 204         cam_fetch_status_entry(cam_status status);
 205 #ifdef _KERNEL
 206 char *  cam_error_string(union ccb *ccb, char *str, int str_len,
 207                          cam_error_string_flags flags,
 208                          cam_error_proto_flags proto_flags);
 209 void    cam_error_print(union ccb *ccb, cam_error_string_flags flags,
 210                         cam_error_proto_flags proto_flags);
 211 #else /* _KERNEL */
 212 struct cam_device;
 213
 214 char *  cam_error_string(struct cam_device *device, union ccb *ccb, char *str,
 215                          int str_len, cam_error_string_flags flags,
 216                          cam_error_proto_flags proto_flags);
 217 void    cam_error_print(struct cam_device *device, union ccb *ccb,
 218                         cam_error_string_flags flags,
 219                         cam_error_proto_flags proto_flags, FILE *ofile);
 220 #endif /* _KERNEL */
 221 __END_DECLS
 222
 223 #ifdef _KERNEL
 224
 225 SYSCTL_DECL(_kern_cam);
 226
 227 static __inline void cam_init_pinfo(cam_pinfo *pinfo);
 228
 229 static __inline void
 230 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 /* !_BUS_CAM_CAM_H_ */