X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=include%2Fscsi%2Fscsi_host.h;h=68f461b7a8355401330a42b35f52aba9393e10db;hb=ca509f69dec7fa564005aa7e9fcf0cd46de3f7d6;hp=b3dd90f3e85868a4023fecceecefb7336f795324;hpb=f28e71617ddaf2483e3e5c5237103484a303743f;p=linux-2.6-omap-h63xx.git

diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index b3dd90f3e85..68f461b7a83 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;
@@ -16,6 +17,7 @@ struct scsi_target;
 struct Scsi_Host;
 struct scsi_host_cmd_pool;
 struct scsi_transport_template;
+struct blk_queue_tags;
 
 
 /*
@@ -122,6 +124,30 @@ struct scsi_host_template {
 	int (* queuecommand)(struct scsi_cmnd *,
 			     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.
+	 *
+	 * This is called to inform the LLD to transfer
+	 * cmd->request_bufflen bytes. The cmd->use_sg speciefies the
+	 * number of scatterlist entried in the command and
+	 * cmd->request_buffer contains the scatterlist.
+	 *
+	 * 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 *));
+
+	/* 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
@@ -239,6 +265,24 @@ 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
@@ -281,6 +325,19 @@ struct scsi_host_template {
 	 */
 	int (*proc_info)(struct Scsi_Host *, char *, char **, off_t, int, int);
 
+	/*
+	 * This is an optional routine that allows the transport to become
+	 * involved when a scsi io timer fires. The return value tells the
+	 * timer routine how to finish the io timeout handling:
+	 * EH_HANDLED:		I fixed the error, please complete the command
+	 * EH_RESET_TIMER:	I need more time, reset the timer and
+	 *			begin counting again
+	 * EH_NOT_HANDLED	Begin normal error recovery
+	 *
+	 * Status: OPTIONAL
+	 */
+	enum scsi_eh_timer_return (* eh_timed_out)(struct scsi_cmnd *);
+
 	/*
 	 * suspend support
 	 */
@@ -465,6 +522,12 @@ struct Scsi_Host {
 	struct scsi_host_template *hostt;
 	struct scsi_transport_template *transportt;
 
+	/*
+	 * area to keep a shared tag map (if needed, will be
+	 * NULL if not)
+	 */
+	struct blk_queue_tag	*bqt;
+
 	/*
 	 * The following two fields are protected with host_lock;
 	 * however, eh routines can safely access during eh processing
@@ -545,6 +608,9 @@ 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
 	 */
@@ -561,6 +627,12 @@ 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;
@@ -641,11 +713,6 @@ 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;
@@ -664,6 +731,9 @@ 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