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-rw-r--r--include/scsi/scsi_host.h54
1 files changed, 21 insertions, 33 deletions
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index 5e362489ee8..019e66858ce 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -46,12 +46,6 @@ struct blk_queue_tags;
#define DISABLE_CLUSTERING 0
#define ENABLE_CLUSTERING 1
-enum {
- SCSI_QDEPTH_DEFAULT, /* default requested change, e.g. from sysfs */
- SCSI_QDEPTH_QFULL, /* scsi-ml requested due to queue full */
- SCSI_QDEPTH_RAMP_UP, /* scsi-ml requested due to threshold event */
-};
-
struct scsi_host_template {
struct module *module;
const char *name;
@@ -195,7 +189,7 @@ struct scsi_host_template {
* Things currently recommended to be handled at this time include:
*
* 1. Setting the device queue depth. Proper setting of this is
- * described in the comments for scsi_adjust_queue_depth.
+ * described in the comments for scsi_change_queue_depth.
* 2. Determining if the device supports the various synchronous
* negotiation protocols. The device struct will already have
* responded to INQUIRY and the results of the standard items
@@ -281,20 +275,7 @@ struct scsi_host_template {
*
* Status: OPTIONAL
*/
- int (* change_queue_depth)(struct scsi_device *, int, int);
-
- /*
- * Fill in this function to allow the changing of tag types
- * (this also allows the enabling/disabling of tag command
- * queueing). An error should only be returned if something
- * went wrong in the driver while trying to set the tag type.
- * If the driver doesn't support the requested tag type, then
- * it should set the closest type it does support without
- * returning an error. Returns the actual tag type set.
- *
- * Status: OPTIONAL
- */
- int (* change_queue_type)(struct scsi_device *, int);
+ int (* change_queue_depth)(struct scsi_device *, int);
/*
* This function determines the BIOS parameters for a given
@@ -422,6 +403,16 @@ struct scsi_host_template {
unsigned char present;
/*
+ * Let the block layer assigns tags to all commands.
+ */
+ unsigned use_blk_tags:1;
+
+ /*
+ * Track QUEUE_FULL events and reduce queue depth on demand.
+ */
+ unsigned track_queue_depth:1;
+
+ /*
* This specifies the mode that a LLD supports.
*/
unsigned supported_mode:2;
@@ -451,11 +442,6 @@ struct scsi_host_template {
*/
unsigned skip_settle_delay:1;
- /*
- * True if we are using ordered write support.
- */
- unsigned ordered_tag:1;
-
/* True if the controller does not support WRITE SAME */
unsigned no_write_same:1;
@@ -555,7 +541,7 @@ struct Scsi_Host {
* __devices is protected by the host_lock, but you should
* usually use scsi_device_lookup / shost_for_each_device
* to access it and don't care about locking yourself.
- * In the rare case of beeing in irq context you can use
+ * In the rare case of being in irq context you can use
* their __ prefixed variants with the lock held. NEVER
* access this list directly from a driver.
*/
@@ -638,6 +624,14 @@ struct Scsi_Host {
short unsigned int sg_prot_tablesize;
unsigned int max_sectors;
unsigned long dma_boundary;
+ /*
+ * In scsi-mq mode, the number of hardware queues supported by the LLD.
+ *
+ * Note: it is assumed that each hardware queue has a queue depth of
+ * can_queue. In other words, the total queue depth per host
+ * is nr_hw_queues * can_queue.
+ */
+ unsigned nr_hw_queues;
/*
* Used to assign serial numbers to the cmds.
* Protected by the host lock.
@@ -647,7 +641,6 @@ struct Scsi_Host {
unsigned active_mode:2;
unsigned unchecked_isa_dma:1;
unsigned use_clustering:1;
- unsigned use_blk_tcq:1;
/*
* Host has requested that no further requests come through for the
@@ -662,11 +655,6 @@ struct Scsi_Host {
*/
unsigned reverse_ordering:1;
- /*
- * Ordered write support
- */
- unsigned ordered_tag:1;
-
/* Task mgmt function in progress */
unsigned tmf_in_progress:1;