1 files changed, 64 insertions, 5 deletions

diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index 39c6f8cc20c3..7f1f411d07af 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -7,6 +7,7 @@
 #include <linux/workqueue.h>
 #include <linux/mutex.h>
 
+struct request_queue;
 struct block_device;
 struct completion;
 struct module;
@@ -124,6 +125,39 @@ struct scsi_host_template {
                              void (*done)(struct scsi_cmnd *));
 
         /*
+         * The transfer functions are used to queue a scsi command to
+         * the LLD. When the driver is finished processing the command
+         * the done callback is invoked.
+         *
+         * return values: see queuecommand
+         *
+         * If the LLD accepts the cmd, it should set the result to an
+         * appropriate value when completed before calling the done function.
+         *
+         * STATUS: REQUIRED FOR TARGET DRIVERS
+         */
+        /* TODO: rename */
+        int (* transfer_response)(struct scsi_cmnd *,
+                                  void (*done)(struct scsi_cmnd *));
+        /*
+         * This is called to inform the LLD to transfer cmd->request_bufflen
+         * bytes of the cmd at cmd->offset in the cmd. The cmd->use_sg
+         * speciefies the number of scatterlist entried in the command
+         * and cmd->request_buffer contains the scatterlist.
+         *
+         * If the command cannot be processed in one transfer_data call
+         * becuase a scatterlist within the LLD's limits cannot be
+         * created then transfer_data will be called multiple times.
+         * It is initially called from process context, and later
+         * calls are from the interrup context.
+         */
+        int (* transfer_data)(struct scsi_cmnd *,
+                              void (*done)(struct scsi_cmnd *));
+
+        /* Used as callback for the completion of task management request. */
+        int (* tsk_mgmt_response)(u64 mid, int result);
+
+        /*
          * This is an error handling strategy routine.  You don't need to
          * define one of these if you don't want to - there is a default
          * routine that is present that should work in most cases.  For those
@@ -241,6 +275,24 @@ struct scsi_host_template {
         void (* target_destroy)(struct scsi_target *);
 
         /*
+         * If a host has the ability to discover targets on its own instead
+         * of scanning the entire bus, it can fill in this function and
+         * call scsi_scan_host().  This function will be called periodically
+         * until it returns 1 with the scsi_host and the elapsed time of
+         * the scan in jiffies.
+         *
+         * Status: OPTIONAL
+         */
+        int (* scan_finished)(struct Scsi_Host *, unsigned long);
+
+        /*
+         * If the host wants to be called before the scan starts, but
+         * after the midlayer has set up ready for the scan, it can fill
+         * in this function.
+         */
+        void (* scan_start)(struct Scsi_Host *);
+
+        /*
          * fill in this function to allow the queue depth of this host
          * to be changeable (on a per device basis).  returns either
          * the current queue depth setting (may be different from what
@@ -552,6 +604,9 @@ struct Scsi_Host {
         /* task mgmt function in progress */
         unsigned tmf_in_progress:1;
 
+        /* Asynchronous scan in progress */
+        unsigned async_scan:1;
+
         /*
          * Optional work queue to be utilized by the transport
          */
@@ -568,6 +623,12 @@ struct Scsi_Host {
          */
         unsigned int max_host_blocked;
 
+        /*
+         * q used for scsi_tgt msgs, async events or any other requests that
+         * need to be processed in userspace
+         */
+        struct request_queue *uspace_req_q;
+
         /* legacy crap */
         unsigned long base;
         unsigned long io_port;
@@ -648,11 +709,6 @@ extern const char *scsi_host_state_name(enum scsi_host_state);
 
 extern u64 scsi_calculate_bounce_limit(struct Scsi_Host *);
 
-static inline void scsi_assign_lock(struct Scsi_Host *shost, spinlock_t *lock)
-{
-        shost->host_lock = lock;
-}
-
 static inline struct device *scsi_get_device(struct Scsi_Host *shost)
 {
         return shost->shost_gendev.parent;
@@ -671,6 +727,9 @@ extern void scsi_unblock_requests(struct Scsi_Host *);
 extern void scsi_block_requests(struct Scsi_Host *);
 
 struct class_container;
+
+extern struct request_queue *__scsi_alloc_queue(struct Scsi_Host *shost,
+                                                void (*) (struct request_queue *));
 /*
  * These two functions are used to allocate and free a pseudo device
  * which will connect to the host adapter itself rather than any