FreeBSD/Linux Kernel Cross Reference
sys/cam/cam.h

     /*-
      * 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: releng/10.0/sys/cam/cam.h 255870 2013-09-25 15:55:56Z scottl $
     */
    
    #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_int lun_id_t;
    typedef union {
            u_int64_t       lun64;
            u_int8_t        lun[8];
    } lun64_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 ((lun_id_t)~0)
    
    /*
     * 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 everytime 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 reponses */
           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. */
   };
   
   /* 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 it's 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;
   
   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;
   
   #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);
   
   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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