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

index 81e9e9c..290f126 100644
@@ -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);

index a8c8080..012be5e 100644
@@ -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);

62 lines not on this page · raw message

index b9c69bf..fe3b505 100644
@@ -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;
 }

index 5431529..b8b0598 100644
@@ -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) {