[PATCH] include/asm-arm26/hardirq.h: remove #define irq_enter()

[linux-2.6] / include / scsi / scsi_host.h

diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index 1cee1e100943dafe00c14d5329b73659062a4d1a..916144be208b93b948f867d04599608fa6b5981f 100644 (file)
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -10,6 +10,7 @@ struct block_device;
 struct module;
 struct scsi_cmnd;
 struct scsi_device;
+struct scsi_target;
 struct Scsi_Host;
 struct scsi_host_cmd_pool;
 struct scsi_transport_template;
@@ -227,6 +228,30 @@ struct scsi_host_template {
         */
        void (* slave_destroy)(struct scsi_device *);
 
+       /*
+        * Before the mid layer attempts to scan for a new device attached
+        * to a target where no target currently exists, it will call this
+        * entry in your driver.  Should your driver need to allocate any
+        * structs or perform any other init items in order to send commands
+        * to a currently unused target, then this is where you can perform
+        * those allocations.
+        *
+        * Return values: 0 on success, non-0 on failure
+        *
+        * Status: OPTIONAL
+        */
+       int (* target_alloc)(struct scsi_target *);
+
+       /*
+        * Immediately prior to deallocating the target structure, and
+        * after all activity to attached scsi devices has ceased, the
+        * midlayer calls this point so that the driver may deallocate
+        * and terminate any references to the target.
+        *
+        * Status: OPTIONAL
+        */
+       void (* target_destroy)(struct scsi_target *);
+
        /*
         * fill in this function to allow the queue depth of this host
         * to be changeable (on a per device basis).  returns either
@@ -404,12 +429,15 @@ struct scsi_host_template {
 };
 
 /*
- * shost states
+ * shost state: If you alter this, you also need to alter scsi_sysfs.c
+ * (for the ascii descriptions) and the state model enforcer:
+ * scsi_host_set_state()
  */
-enum {
-       SHOST_ADD,
-       SHOST_DEL,
+enum scsi_host_state {
+       SHOST_CREATED = 1,
+       SHOST_RUNNING,
        SHOST_CANCEL,
+       SHOST_DEL,
        SHOST_RECOVERY,
 };
 
@@ -439,12 +467,10 @@ struct Scsi_Host {
        struct task_struct    * ehandler;  /* Error recovery thread. */
        struct semaphore      * eh_wait;   /* The error recovery thread waits
                                              on this. */
-       struct completion     * eh_notify; /* wait for eh to begin or end */
        struct semaphore      * eh_action; /* Wait for specific actions on the
                                           host. */
        unsigned int            eh_active:1; /* Indicates the eh thread is awake and active if
                                           this is true. */
-       unsigned int            eh_kill:1; /* set when killing the eh thread */
        wait_queue_head_t       host_wait;
        struct scsi_host_template *hostt;
        struct scsi_transport_template *transportt;
@@ -550,7 +576,7 @@ struct Scsi_Host {
        unsigned int  irq;
        
 
-       unsigned long shost_state;
+       enum scsi_host_state shost_state;
 
        /* ldm bits */
        struct device           shost_gendev;
@@ -608,6 +634,7 @@ extern void scsi_remove_host(struct Scsi_Host *);
 extern struct Scsi_Host *scsi_host_get(struct Scsi_Host *);
 extern void scsi_host_put(struct Scsi_Host *t);
 extern struct Scsi_Host *scsi_host_lookup(unsigned short);
+extern const char *scsi_host_state_name(enum scsi_host_state);
 
 extern u64 scsi_calculate_bounce_limit(struct Scsi_Host *);
 
@@ -616,15 +643,18 @@ static inline void scsi_assign_lock(struct Scsi_Host *shost, spinlock_t *lock)
        shost->host_lock = lock;
 }
 
-static inline void scsi_set_device(struct Scsi_Host *shost,
-                                   struct device *dev)
+static inline struct device *scsi_get_device(struct Scsi_Host *shost)
 {
-        shost->shost_gendev.parent = dev;
+        return shost->shost_gendev.parent;
 }
 
-static inline struct device *scsi_get_device(struct Scsi_Host *shost)
+/**
+ * scsi_host_scan_allowed - Is scanning of this host allowed
+ * @shost:     Pointer to Scsi_Host.
+ **/
+static inline int scsi_host_scan_allowed(struct Scsi_Host *shost)
 {
-        return shost->shost_gendev.parent;
+       return shost->shost_state == SHOST_RUNNING;
 }
 
 extern void scsi_unblock_requests(struct Scsi_Host *);
@@ -644,5 +674,6 @@ extern struct scsi_device *scsi_get_host_dev(struct Scsi_Host *);
 /* legacy interfaces */
 extern struct Scsi_Host *scsi_register(struct scsi_host_template *, int);
 extern void scsi_unregister(struct Scsi_Host *);
+extern int scsi_host_set_state(struct Scsi_Host *, enum scsi_host_state);
 
 #endif /* _SCSI_SCSI_HOST_H */