[SCSI] srp_transport: add target driver support

[linux-2.6-omap-h63xx.git] / include / scsi / scsi_host.h

diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index 7f1f411d07af04c47f1faf7ce6400b57c197fef2..89c40c4bd5c481030ffc72a9705f125a484b38b9 100644 (file)
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -129,6 +129,11 @@ struct scsi_host_template {
         * 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
@@ -139,23 +144,9 @@ struct scsi_host_template {
        /* 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);
+       int (* tsk_mgmt_response)(struct Scsi_Host *, u64, u64 mid, int result);
 
        /*
         * This is an error handling strategy routine.  You don't need to
@@ -335,15 +326,22 @@ struct scsi_host_template {
        int (*proc_info)(struct Scsi_Host *, char *, char **, off_t, int, int);
 
        /*
-        * suspend support
+        * 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
         */
-       int (*resume)(struct scsi_device *);
-       int (*suspend)(struct scsi_device *, pm_message_t state);
+       enum scsi_eh_timer_return (* eh_timed_out)(struct scsi_cmnd *);
 
        /*
         * Name of proc directory
         */
-       char *proc_name;
+       const char *proc_name;
 
        /*
         * Used to store the procfs directory if a driver implements the
@@ -673,6 +671,10 @@ struct Scsi_Host {
 #define shost_printk(prefix, shost, fmt, a...) \
        dev_printk(prefix, &(shost)->shost_gendev, fmt, ##a)
 
+static inline void *shost_priv(struct Scsi_Host *shost)
+{
+       return (void *)shost->hostdata;
+}
 
 int scsi_is_host_device(const struct device *);