mpi3mr: add support for driver commands

There are certain BSG commands which is to be completed
by driver without involving firmware. These requests are termed
as driver commands. This patch adds support for the same.

Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Sumit Saxena <sumit.saxena@broadcom.com>

drivers/scsi/mpi3mr/mpi3mr.h

@@ -89,7 +89,7 @@ extern int prot_mask;
 /* Reserved Host Tag definitions */
 #define MPI3MR_HOSTTAG_INVALID		0xFFFF
 #define MPI3MR_HOSTTAG_INITCMDS		1
-#define MPI3MR_HOSTTAG_IOCTLCMDS	2
+#define MPI3MR_HOSTTAG_BSG_CMDS		2
 #define MPI3MR_HOSTTAG_BLK_TMS		5
 
 #define MPI3MR_NUM_DEVRMCMD		16
@@ -202,10 +202,10 @@ enum mpi3mr_iocstate {
 enum mpi3mr_reset_reason {
 	MPI3MR_RESET_FROM_BRINGUP = 1,
 	MPI3MR_RESET_FROM_FAULT_WATCH = 2,
-	MPI3MR_RESET_FROM_IOCTL = 3,
+	MPI3MR_RESET_FROM_APP = 3,
 	MPI3MR_RESET_FROM_EH_HOS = 4,
 	MPI3MR_RESET_FROM_TM_TIMEOUT = 5,
-	MPI3MR_RESET_FROM_IOCTL_TIMEOUT = 6,
+	MPI3MR_RESET_FROM_APP_TIMEOUT = 6,
 	MPI3MR_RESET_FROM_MUR_FAILURE = 7,
 	MPI3MR_RESET_FROM_CTLR_CLEANUP = 8,
 	MPI3MR_RESET_FROM_CIACTIV_FAULT = 9,
@@ -698,6 +698,7 @@ struct scmd_priv {
  * @chain_bitmap_sz: Chain buffer allocator bitmap size
  * @chain_bitmap: Chain buffer allocator bitmap
  * @chain_buf_lock: Chain buffer list lock
+ * @bsg_cmds: Command tracker for BSG command
  * @host_tm_cmds: Command tracker for task management commands
  * @dev_rmhs_cmds: Command tracker for device removal commands
  * @evtack_cmds: Command tracker for event ack commands
@@ -729,6 +730,10 @@ struct scmd_priv {
  * @requested_poll_qcount: User requested poll queue count
  * @bsg_dev: BSG device structure
  * @bsg_queue: Request queue for BSG device
+ * @stop_bsgs: Stop BSG request flag
+ * @logdata_buf: Circular buffer to store log data entries
+ * @logdata_buf_idx: Index of entry in buffer to store
+ * @logdata_entry_sz: log data entry size
  */
 struct mpi3mr_ioc {
 	struct list_head list;
@@ -835,6 +840,7 @@ struct mpi3mr_ioc {
 	void *chain_bitmap;
 	spinlock_t chain_buf_lock;
 
+	struct mpi3mr_drv_cmd bsg_cmds;
 	struct mpi3mr_drv_cmd host_tm_cmds;
 	struct mpi3mr_drv_cmd dev_rmhs_cmds[MPI3MR_NUM_DEVRMCMD];
 	struct mpi3mr_drv_cmd evtack_cmds[MPI3MR_NUM_EVTACKCMD];
@@ -872,6 +878,10 @@ struct mpi3mr_ioc {
 
 	struct device *bsg_dev;
 	struct request_queue *bsg_queue;
+	u8 stop_bsgs;
+	u8 *logdata_buf;
+	u16 logdata_buf_idx;
+	u16 logdata_entry_sz;
 };
 
 /**