isci: preallocate requests

the dma_pool interface is optimized for object_size << page_size which
is not the case with isci_request objects and the dma_pool routines show
up in the top of the profile.

The old io_request_table which tracked whether tci slots were in-flight
or not is replaced with an IREQ_ACTIVE flag per request.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 1 insertions, 10 deletions

diff --git a/drivers/scsi/isci/host.h b/drivers/scsi/isci/host.h
index d8164f5d7988..446fade19b3a 100644
--- a/drivers/scsi/isci/host.h
+++ b/drivers/scsi/isci/host.h
@@ -166,14 +166,6 @@ struct scic_sds_controller {
         struct scic_sds_remote_device *device_table[SCI_MAX_REMOTE_DEVICES];
 
         /**
-         * This field is the array of IO request objects that are currently active for
-         * this controller object.  This table is used as a fast lookup of the io
-         * request object that need to handle completion queue notifications.  The
-         * table is TCi based.
-         */
-        struct scic_sds_request *io_request_table[SCI_MAX_IO_REQUESTS];
-
-        /**
          * This field is the free RNi data structure
          */
         struct scic_remote_node_table available_remote_nodes;
@@ -298,7 +290,6 @@ struct isci_host {
         union scic_oem_parameters oem_parameters;
 
         int id; /* unique within a given pci device */
-        struct dma_pool *dma_pool;
         struct isci_phy phys[SCI_MAX_PHYS];
         struct isci_port ports[SCI_MAX_PORTS + 1]; /* includes dummy port */
         struct sas_ha_struct sas_ha;
@@ -315,7 +306,7 @@ struct isci_host {
         struct list_head requests_to_complete;
         struct list_head requests_to_errorback;
         spinlock_t scic_lock;
-
+        struct isci_request *reqs[SCI_MAX_IO_REQUESTS];
         struct isci_remote_device devices[SCI_MAX_REMOTE_DEVICES];
 };