*参照元 [#w2f3a02b]
#backlinks

*説明 [#s046159a]
-パス: [[linux-2.6.25/include/scsi/scsi_device.h]]

-FIXME: これは何?
--説明


**参考 [#n85debc9]


*実装 [#zbda078b]
 struct scsi_device {
         struct Scsi_Host *host;
-
--[[linux-2.6.25/Scsi_Host]]

         struct request_queue *request_queue;
-
--[[linux-2.6.25/request_queue]]

 
         /* the next two are protected by the host->host_lock */
         struct list_head    siblings;   /* list of all devices on this host */
         struct list_head    same_target_siblings; /* just the devices sharing same target id */
-
--[[linux-2.6.25/list_head]]

         /* this is now protected by the request_queue->queue_lock */
         unsigned int device_busy;       /* commands actually active on
                                          * low-level. protected by queue_lock. */
 
         spinlock_t list_lock;
-
--[[linux-2.6.25/spinlock_t]]

         struct list_head cmd_list;      /* queue of in use SCSI Command structures */
         struct list_head starved_entry;
         struct scsi_cmnd *current_cmnd; /* currently active command */
-
--[[linux-2.6.25/scsi_cmnd]]

         unsigned short queue_depth;     /* How deep of a queue we want */
         unsigned short last_queue_full_depth; /* These two are used by */
         unsigned short last_queue_full_count; /* scsi_track_queue_full() */
         unsigned long last_queue_full_time;/* don't let QUEUE_FULLs on the same
                                            jiffie count on our counter, they
                                            could all be from the same event. */
 
         unsigned int id, lun, channel;
 
         unsigned int manufacturer;      /* Manufacturer of device, for using
                                          * vendor-specific cmd's */
         unsigned sector_size;   /* size in bytes */
 
         void *hostdata;         /* available to low-level driver */
         char type;
         char scsi_level;
         char inq_periph_qual;   /* PQ from INQUIRY data */
         unsigned char inquiry_len;      /* valid bytes in 'inquiry' */
         unsigned char * inquiry;        /* INQUIRY response data */
         const char * vendor;            /* [back_compat] point into 'inquiry' ... */
         const char * model;             /* ... after scan; point to static string */
         const char * rev;               /* ... "nullnullnullnull" before scan */
         unsigned char current_tag;      /* current tag */
         struct scsi_target      *sdev_target;   /* used only for single_lun */
-
--[[linux-2.6.25/scsi_target]]


         unsigned int    sdev_bflags; /* black/white flags as also found in
                                  * scsi_devinfo.[hc]. For now used only to
                                  * pass settings from slave_alloc to scsi
                                  * core. */
         unsigned writeable:1;
         unsigned removable:1;
         unsigned changed:1;     /* Data invalid due to media change */
         unsigned busy:1;        /* Used to prevent races */
         unsigned lockable:1;    /* Able to prevent media removal */
         unsigned locked:1;      /* Media removal disabled */
         unsigned borken:1;      /* Tell the Seagate driver to be
                                  * painfully slow on this device */
         unsigned disconnect:1;  /* can disconnect */
         unsigned soft_reset:1;  /* Uses soft reset option */
         unsigned sdtr:1;        /* Device supports SDTR messages */
         unsigned wdtr:1;        /* Device supports WDTR messages */
         unsigned ppr:1;         /* Device supports PPR messages */
         unsigned tagged_supported:1;    /* Supports SCSI-II tagged queuing */
         unsigned simple_tags:1; /* simple queue tag messages are enabled */
         unsigned ordered_tags:1;/* ordered queue tag messages are enabled */
         unsigned was_reset:1;   /* There was a bus reset on the bus for
                                  * this device */
         unsigned expecting_cc_ua:1; /* Expecting a CHECK_CONDITION/UNIT_ATTN
                                      * because we did a bus reset. */
         unsigned use_10_for_rw:1; /* first try 10-byte read / write */
         unsigned use_10_for_ms:1; /* first try 10-byte mode sense/select */
         unsigned skip_ms_page_8:1;      /* do not use MODE SENSE page 0x08 */
         unsigned skip_ms_page_3f:1;     /* do not use MODE SENSE page 0x3f */
         unsigned use_192_bytes_for_3f:1; /* ask for 192 bytes from page 0x3f */
         unsigned no_start_on_add:1;     /* do not issue start on add */
         unsigned allow_restart:1; /* issue START_UNIT in error handler */
         unsigned manage_start_stop:1;   /* Let HLD (sd) manage start/stop */
         unsigned no_uld_attach:1; /* disable connecting to upper level drivers */
         unsigned select_no_atn:1;
         unsigned fix_capacity:1;        /* READ_CAPACITY is too high by 1 */
         unsigned guess_capacity:1;      /* READ_CAPACITY might be too high by 1 */
         unsigned retry_hwerror:1;       /* Retry HARDWARE_ERROR */
         unsigned last_sector_bug:1;     /* Always read last sector in a 1 sector read */
 
         DECLARE_BITMAP(supported_events, SDEV_EVT_MAXBITS); /* supported events */
-
--[[linux-2.6.25/DECLARE_BITMAP]]

         struct list_head event_list;    /* asserted events */
         struct work_struct event_work;
-
--[[linux-2.6.25/work_struct]]

         unsigned int device_blocked;    /* Device returned QUEUE_FULL. */
 
         unsigned int max_device_blocked; /* what device_blocked counts down from */
 #define SCSI_DEFAULT_DEVICE_BLOCKED     3
 
         atomic_t iorequest_cnt;
         atomic_t iodone_cnt;
         atomic_t ioerr_cnt;
-
--[[linux-2.6.25/atomic_t]]

         int timeout;
 
         struct device           sdev_gendev;
-
--[[linux-2.6.25/device]]

         struct class_device     sdev_classdev;
-
--[[linux-2.6.25/class_device]]

 
         struct execute_work     ew; /* used to get process context on put */
-
--[[linux-2.6.25/execute_work]]

         enum scsi_device_state sdev_state;
-
--[[linux-2.6.25/scsi_device_state]]

         unsigned long           sdev_data[0];
 } __attribute__((aligned(sizeof(unsigned long))));
 

*コメント [#y4405a29]

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