[SCSI] mpt fusion: Usage of high priority request FIFO to send task management commands

Added support for sending the task management requests through High priority
request FIFO instead of Doorbell writes when firmware support High priority
FIFO.
signed-off-by: Sathya Prakash <sathya.prakash@lsi.com>
Acked-by: Eric Moore <Eric.Moore@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

drivers/message/fusion/mptbase.c

@@ -842,6 +842,38 @@ mpt_put_msg_frame(int handle, MPT_ADAPTER *ioc, MPT_FRAME_HDR *mf)
 	CHIPREG_WRITE32(&ioc->chip->RequestFifo, mf_dma_addr);
 }
 
+/**
+ *	mpt_put_msg_frame_hi_pri - Send a protocol specific MPT request frame
+ *	to a IOC using hi priority request queue.
+ *	@handle: Handle of registered MPT protocol driver
+ *	@ioc: Pointer to MPT adapter structure
+ *	@mf: Pointer to MPT request frame
+ *
+ *	This routine posts a MPT request frame to the request post FIFO of a
+ *	specific MPT adapter.
+ **/
+void
+mpt_put_msg_frame_hi_pri(int handle, MPT_ADAPTER *ioc, MPT_FRAME_HDR *mf)
+{
+	u32 mf_dma_addr;
+	int req_offset;
+	u16	 req_idx;	/* Request index */
+
+	/* ensure values are reset properly! */
+	mf->u.frame.hwhdr.msgctxu.fld.cb_idx = handle;
+	req_offset = (u8 *)mf - (u8 *)ioc->req_frames;
+	req_idx = req_offset / ioc->req_sz;
+	mf->u.frame.hwhdr.msgctxu.fld.req_idx = cpu_to_le16(req_idx);
+	mf->u.frame.hwhdr.msgctxu.fld.rsvd = 0;
+
+	DBG_DUMP_PUT_MSG_FRAME(ioc, (u32 *)mf);
+
+	mf_dma_addr = (ioc->req_frames_low_dma + req_offset);
+	dsgprintk(ioc, printk(MYIOC_s_DEBUG_FMT "mf_dma_addr=%x req_idx=%d\n",
+		ioc->name, mf_dma_addr, req_idx));
+	CHIPREG_WRITE32(&ioc->chip->RequestHiPriFifo, mf_dma_addr);
+}
+
 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
 /**
  *	mpt_free_msg_frame - Place MPT request frame back on FreeQ.
@@ -7315,6 +7347,7 @@ EXPORT_SYMBOL(mpt_device_driver_register);
 EXPORT_SYMBOL(mpt_device_driver_deregister);
 EXPORT_SYMBOL(mpt_get_msg_frame);
 EXPORT_SYMBOL(mpt_put_msg_frame);
+EXPORT_SYMBOL(mpt_put_msg_frame_hi_pri);
 EXPORT_SYMBOL(mpt_free_msg_frame);
 EXPORT_SYMBOL(mpt_add_sge);
 EXPORT_SYMBOL(mpt_send_handshake_request);

drivers/message/fusion/mptbase.h

@@ -336,7 +336,8 @@ typedef struct _SYSIF_REGS
 	u32	Reserved2[2];	/* 38-3F  reserved for future use    */
 	u32	RequestFifo;	/* 40     Request Post/Free FIFO     */
 	u32	ReplyFifo;	/* 44     Reply   Post/Free FIFO     */
-	u32	Reserved3[2];	/* 48-4F  reserved for future use    */
+	u32	RequestHiPriFifo; /* 48   Hi Priority Request FIFO   */
+	u32	Reserved3;	/* 4C-4F  reserved for future use    */
 	u32	HostIndex;	/* 50     Host Index register        */
 	u32	Reserved4[15];	/* 54-8F                             */
 	u32	Fubar;		/* 90     For Fubar usage            */
@@ -893,6 +894,7 @@ extern void	 mpt_device_driver_deregister(int cb_idx);
 extern MPT_FRAME_HDR	*mpt_get_msg_frame(int handle, MPT_ADAPTER *ioc);
 extern void	 mpt_free_msg_frame(MPT_ADAPTER *ioc, MPT_FRAME_HDR *mf);
 extern void	 mpt_put_msg_frame(int handle, MPT_ADAPTER *ioc, MPT_FRAME_HDR *mf);
+extern void	 mpt_put_msg_frame_hi_pri(int handle, MPT_ADAPTER *ioc, MPT_FRAME_HDR *mf);
 extern void	 mpt_add_sge(char *pAddr, u32 flagslength, dma_addr_t dma_addr);
 
 extern int	 mpt_send_handshake_request(int handle, MPT_ADAPTER *ioc, int reqBytes, u32 *req, int sleepFlag);

drivers/message/fusion/mptctl.c

@@ -342,7 +342,7 @@ static int mptctl_bus_reset(MPT_IOCTL *ioctl)
 	SCSITaskMgmt_t	*pScsiTm;
 	MPT_SCSI_HOST	*hd;
 	int		 ii;
-	int		 retval;
+	int		 retval=0;
 
 
 	ioctl->reset &= ~MPTCTL_RESET_OK;
@@ -395,12 +395,19 @@ static int mptctl_bus_reset(MPT_IOCTL *ioctl)
 	DBG_DUMP_TM_REQUEST_FRAME(ioctl->ioc, (u32 *)mf);
 
 	ioctl->wait_done=0;
-	if ((retval = mpt_send_handshake_request(mptctl_id, ioctl->ioc,
-	     sizeof(SCSITaskMgmt_t), (u32*)pScsiTm, CAN_SLEEP)) != 0) {
-		dfailprintk(ioctl->ioc, printk(MYIOC_s_ERR_FMT "_send_handshake FAILED!"
-			" (hd %p, ioc %p, mf %p) \n", hd->ioc->name, hd,
-			hd->ioc, mf));
-		goto mptctl_bus_reset_done;
+
+	if ((ioctl->ioc->facts.IOCCapabilities & MPI_IOCFACTS_CAPABILITY_HIGH_PRI_Q) &&
+	    (ioctl->ioc->facts.MsgVersion >= MPI_VERSION_01_05))
+		mpt_put_msg_frame_hi_pri(mptctl_id, ioctl->ioc, mf);
+	else {
+		retval = mpt_send_handshake_request(mptctl_id, ioctl->ioc,
+			sizeof(SCSITaskMgmt_t), (u32*)pScsiTm, CAN_SLEEP);
+		if (retval != 0) {
+			dfailprintk(ioctl->ioc, printk(MYIOC_s_ERR_FMT "_send_handshake FAILED!"
+				" (hd %p, ioc %p, mf %p) \n", hd->ioc->name, hd,
+				hd->ioc, mf));
+			goto mptctl_bus_reset_done;
+		}
 	}
 
 	/* Now wait for the command to complete */
@@ -2187,15 +2194,20 @@ mptctl_do_mpt_command (struct mpt_ioctl_command karg, void __user *mfPtr)
 
 		DBG_DUMP_TM_REQUEST_FRAME(ioc, (u32 *)mf);
 
-		if (mpt_send_handshake_request(mptctl_id, ioc,
-			sizeof(SCSITaskMgmt_t), (u32*)mf,
-			CAN_SLEEP) != 0) {
-			dfailprintk(ioc, printk(MYIOC_s_ERR_FMT "_send_handshake FAILED!"
-				" (ioc %p, mf %p) \n", ioc->name,
-				ioc, mf));
-			mptctl_free_tm_flags(ioc);
-			rc = -ENODATA;
-			goto done_free_mem;
+		if ((ioc->facts.IOCCapabilities & MPI_IOCFACTS_CAPABILITY_HIGH_PRI_Q) &&
+		    (ioc->facts.MsgVersion >= MPI_VERSION_01_05))
+			mpt_put_msg_frame_hi_pri(mptctl_id, ioc, mf);
+		else {
+			rc =mpt_send_handshake_request(mptctl_id, ioc,
+				sizeof(SCSITaskMgmt_t), (u32*)mf, CAN_SLEEP);
+			if (rc != 0) {
+				dfailprintk(ioc, printk(MYIOC_s_ERR_FMT
+				    "_send_handshake FAILED! (ioc %p, mf %p)\n",
+				    ioc->name, ioc, mf));
+				mptctl_free_tm_flags(ioc);
+				rc = -ENODATA;
+				goto done_free_mem;
+			}
 		}
 
 	} else

drivers/message/fusion/mptsas.c

@@ -623,13 +623,7 @@ mptsas_target_reset(MPT_ADAPTER *ioc, u8 channel, u8 id)
 
 	DBG_DUMP_TM_REQUEST_FRAME(ioc, (u32 *)mf);
 
-	if (mpt_send_handshake_request(ioc->TaskCtx, ioc,
-	    sizeof(SCSITaskMgmt_t), (u32 *)mf, NO_SLEEP)) {
-		mpt_free_msg_frame(ioc, mf);
-		dfailprintk(ioc, printk(MYIOC_s_WARN_FMT "%s, tm handshake failed @%d!!\n",
-		    ioc->name,__FUNCTION__, __LINE__));
-		return 0;
-	}
+	mpt_put_msg_frame_hi_pri(ioc->TaskCtx, ioc, mf);
 
 	return 1;
 }

drivers/message/fusion/mptscsih.c

@@ -1717,12 +1717,18 @@ mptscsih_IssueTaskMgmt(MPT_SCSI_HOST *hd, u8 type, u8 channel, u8 id, int lun, i
 
 	DBG_DUMP_TM_REQUEST_FRAME(ioc, (u32 *)pScsiTm);
 
-	if ((retval = mpt_send_handshake_request(hd->ioc->TaskCtx, hd->ioc,
-		sizeof(SCSITaskMgmt_t), (u32*)pScsiTm, CAN_SLEEP)) != 0) {
-		dfailprintk(hd->ioc, printk(MYIOC_s_ERR_FMT "send_handshake FAILED!"
+	if ((hd->ioc->facts.IOCCapabilities & MPI_IOCFACTS_CAPABILITY_HIGH_PRI_Q) &&
+	    (hd->ioc->facts.MsgVersion >= MPI_VERSION_01_05))
+		mpt_put_msg_frame_hi_pri(hd->ioc->TaskCtx, hd->ioc, mf);
+	else {
+		retval = mpt_send_handshake_request(hd->ioc->TaskCtx, hd->ioc,
+			sizeof(SCSITaskMgmt_t), (u32*)pScsiTm, CAN_SLEEP);
+		if (retval) {
+			dfailprintk(hd->ioc, printk(MYIOC_s_ERR_FMT "send_handshake FAILED!"
 			" (hd %p, ioc %p, mf %p, rc=%d) \n", hd->ioc->name, hd,
 			hd->ioc, mf, retval));
-		goto fail_out;
+			goto fail_out;
+		}
 	}
 
 	if(mptscsih_tm_wait_for_completion(hd, timeout) == FAILED) {