mptscsih.c

LINUX 2.6.17.4的源码

		if ((mptscsih_getFreeChainBuffer(ioc, &newIndex)) == FAILED) {
			dfailprintk((MYIOC_s_INFO_FMT
			    "getFreeChainBuffer FAILED SCSI cmd=%02x (%p)\n",
 			    ioc->name, pReq->CDB[0], SCpnt));
			return FAILED;
		}

		/* Update the tracking arrays.
		 * If chainSge == NULL, update ReqToChain, else ChainToChain
		 */
		if (chainSge) {
			ioc->ChainToChain[chain_idx] = newIndex;
		} else {
			ioc->ReqToChain[req_idx] = newIndex;
		}
		chain_idx = newIndex;
		chain_dma_off = ioc->req_sz * chain_idx;

		/* Populate the chainSGE for the current buffer.
		 * - Set chain buffer pointer to psge and fill
		 *   out the Address and Flags fields.
		 */
		chainSge = (char *) psge;
		dsgprintk((KERN_INFO "  Current buff @ %p (index 0x%x)",
				psge, req_idx));

		/* Start the SGE for the next buffer
		 */
		psge = (char *) (ioc->ChainBuffer + chain_dma_off);
		sgeOffset = 0;
		sg_done = 0;

		dsgprintk((KERN_INFO "  Chain buff @ %p (index 0x%x)\n",
				psge, chain_idx));

		/* Start the SGE for the next buffer
		 */

		goto nextSGEset;
	}

	return SUCCESS;
} /* mptscsih_AddSGE() */

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/*
 *	mptscsih_io_done - Main SCSI IO callback routine registered to
 *	Fusion MPT (base) driver
 *	@ioc: Pointer to MPT_ADAPTER structure
 *	@mf: Pointer to original MPT request frame
 *	@r: Pointer to MPT reply frame (NULL if TurboReply)
 *
 *	This routine is called from mpt.c::mpt_interrupt() at the completion
 *	of any SCSI IO request.
 *	This routine is registered with the Fusion MPT (base) driver at driver
 *	load/init time via the mpt_register() API call.
 *
 *	Returns 1 indicating alloc'd request frame ptr should be freed.
 */
int
mptscsih_io_done(MPT_ADAPTER *ioc, MPT_FRAME_HDR *mf, MPT_FRAME_HDR *mr)
{
	struct scsi_cmnd	*sc;
	MPT_SCSI_HOST	*hd;
	SCSIIORequest_t	*pScsiReq;
	SCSIIOReply_t	*pScsiReply;
	u16		 req_idx, req_idx_MR;

	hd = (MPT_SCSI_HOST *) ioc->sh->hostdata;

	req_idx = le16_to_cpu(mf->u.frame.hwhdr.msgctxu.fld.req_idx);
	req_idx_MR = (mr != NULL) ?
	    le16_to_cpu(mr->u.frame.hwhdr.msgctxu.fld.req_idx) : req_idx;
	if ((req_idx != req_idx_MR) ||
	    (mf->u.frame.linkage.arg1 == 0xdeadbeaf)) {
		printk(MYIOC_s_ERR_FMT "Received a mf that was already freed\n",
		    ioc->name);
		printk (MYIOC_s_ERR_FMT
		    "req_idx=%x req_idx_MR=%x mf=%p mr=%p sc=%p\n",
		    ioc->name, req_idx, req_idx_MR, mf, mr,
		    hd->ScsiLookup[req_idx_MR]);
		return 0;
	}

	sc = hd->ScsiLookup[req_idx];
	if (sc == NULL) {
		MPIHeader_t *hdr = (MPIHeader_t *)mf;

		/* Remark: writeSDP1 will use the ScsiDoneCtx
		 * If a SCSI I/O cmd, device disabled by OS and
		 * completion done. Cannot touch sc struct. Just free mem.
		 */
		if (hdr->Function == MPI_FUNCTION_SCSI_IO_REQUEST)
			printk(MYIOC_s_ERR_FMT "NULL ScsiCmd ptr!\n",
			ioc->name);

		mptscsih_freeChainBuffers(ioc, req_idx);
		return 1;
	}

	sc->result = DID_OK << 16;		/* Set default reply as OK */
	pScsiReq = (SCSIIORequest_t *) mf;
	pScsiReply = (SCSIIOReply_t *) mr;

	if((ioc->facts.MsgVersion >= MPI_VERSION_01_05) && pScsiReply){
		dmfprintk((MYIOC_s_INFO_FMT
			"ScsiDone (mf=%p,mr=%p,sc=%p,idx=%d,task-tag=%d)\n",
			ioc->name, mf, mr, sc, req_idx, pScsiReply->TaskTag));
	}else{
		dmfprintk((MYIOC_s_INFO_FMT
			"ScsiDone (mf=%p,mr=%p,sc=%p,idx=%d)\n",
			ioc->name, mf, mr, sc, req_idx));
	}

	if (pScsiReply == NULL) {
		/* special context reply handling */
		;
	} else {
		u32	 xfer_cnt;
		u16	 status;
		u8	 scsi_state, scsi_status;

		status = le16_to_cpu(pScsiReply->IOCStatus) & MPI_IOCSTATUS_MASK;
		scsi_state = pScsiReply->SCSIState;
		scsi_status = pScsiReply->SCSIStatus;
		xfer_cnt = le32_to_cpu(pScsiReply->TransferCount);
		sc->resid = sc->request_bufflen - xfer_cnt;

		/*
		 *  if we get a data underrun indication, yet no data was
		 *  transferred and the SCSI status indicates that the
		 *  command was never started, change the data underrun
		 *  to success
		 */
		if (status == MPI_IOCSTATUS_SCSI_DATA_UNDERRUN && xfer_cnt == 0 &&
		    (scsi_status == MPI_SCSI_STATUS_BUSY ||
		     scsi_status == MPI_SCSI_STATUS_RESERVATION_CONFLICT ||
		     scsi_status == MPI_SCSI_STATUS_TASK_SET_FULL)) {
			status = MPI_IOCSTATUS_SUCCESS;
		}

		dreplyprintk((KERN_NOTICE "Reply ha=%d id=%d lun=%d:\n"
			"IOCStatus=%04xh SCSIState=%02xh SCSIStatus=%02xh\n"
			"resid=%d bufflen=%d xfer_cnt=%d\n",
			ioc->id, sc->device->id, sc->device->lun,
			status, scsi_state, scsi_status, sc->resid,
			sc->request_bufflen, xfer_cnt));

		if (scsi_state & MPI_SCSI_STATE_AUTOSENSE_VALID)
			mptscsih_copy_sense_data(sc, hd, mf, pScsiReply);

		/*
		 *  Look for + dump FCP ResponseInfo[]!
		 */
		if (scsi_state & MPI_SCSI_STATE_RESPONSE_INFO_VALID &&
		    pScsiReply->ResponseInfo) {
			printk(KERN_NOTICE "ha=%d id=%d lun=%d: "
			"FCP_ResponseInfo=%08xh\n",
			ioc->id, sc->device->id, sc->device->lun,
			le32_to_cpu(pScsiReply->ResponseInfo));
		}

		switch(status) {
		case MPI_IOCSTATUS_BUSY:			/* 0x0002 */
			/* CHECKME!
			 * Maybe: DRIVER_BUSY | SUGGEST_RETRY | DID_SOFT_ERROR (retry)
			 * But not: DID_BUS_BUSY lest one risk
			 * killing interrupt handler:-(
			 */
			sc->result = SAM_STAT_BUSY;
			break;

		case MPI_IOCSTATUS_SCSI_INVALID_BUS:		/* 0x0041 */
		case MPI_IOCSTATUS_SCSI_INVALID_TARGETID:	/* 0x0042 */
			sc->result = DID_BAD_TARGET << 16;
			break;

		case MPI_IOCSTATUS_SCSI_DEVICE_NOT_THERE:	/* 0x0043 */
			/* Spoof to SCSI Selection Timeout! */
			if (ioc->bus_type != FC)
				sc->result = DID_NO_CONNECT << 16;
			/* else fibre, just stall until rescan event */
			else
				sc->result = DID_REQUEUE << 16;

			if (hd->sel_timeout[pScsiReq->TargetID] < 0xFFFF)
				hd->sel_timeout[pScsiReq->TargetID]++;
			break;

		case MPI_IOCSTATUS_SCSI_TASK_TERMINATED:	/* 0x0048 */
		case MPI_IOCSTATUS_SCSI_IOC_TERMINATED:		/* 0x004B */
		case MPI_IOCSTATUS_SCSI_EXT_TERMINATED:		/* 0x004C */
			/* Linux handles an unsolicited DID_RESET better
			 * than an unsolicited DID_ABORT.
			 */
			sc->result = DID_RESET << 16;

			break;

		case MPI_IOCSTATUS_SCSI_RESIDUAL_MISMATCH:	/* 0x0049 */
			sc->resid = sc->request_bufflen - xfer_cnt;
			if((xfer_cnt==0)||(sc->underflow > xfer_cnt))
				sc->result=DID_SOFT_ERROR << 16;
			else /* Sufficient data transfer occurred */
				sc->result = (DID_OK << 16) | scsi_status;
			dreplyprintk((KERN_NOTICE 
			    "RESIDUAL_MISMATCH: result=%x on id=%d\n", sc->result, sc->device->id));
			break;

		case MPI_IOCSTATUS_SCSI_DATA_UNDERRUN:		/* 0x0045 */
			/*
			 *  Do upfront check for valid SenseData and give it
			 *  precedence!
			 */
			sc->result = (DID_OK << 16) | scsi_status;
			if (scsi_state & MPI_SCSI_STATE_AUTOSENSE_VALID) {
				/* Have already saved the status and sense data
				 */
				;
			} else {
				if (xfer_cnt < sc->underflow) {
					if (scsi_status == SAM_STAT_BUSY)
						sc->result = SAM_STAT_BUSY;
					else
						sc->result = DID_SOFT_ERROR << 16;
				}
				if (scsi_state & (MPI_SCSI_STATE_AUTOSENSE_FAILED | MPI_SCSI_STATE_NO_SCSI_STATUS)) {
					/* What to do?
				 	*/
					sc->result = DID_SOFT_ERROR << 16;
				}
				else if (scsi_state & MPI_SCSI_STATE_TERMINATED) {
					/*  Not real sure here either...  */
					sc->result = DID_RESET << 16;
				}
			}

			dreplyprintk((KERN_NOTICE "  sc->underflow={report ERR if < %02xh bytes xfer'd}\n",
					sc->underflow));
			dreplyprintk((KERN_NOTICE "  ActBytesXferd=%02xh\n", xfer_cnt));
			/* Report Queue Full
			 */
			if (scsi_status == MPI_SCSI_STATUS_TASK_SET_FULL)
				mptscsih_report_queue_full(sc, pScsiReply, pScsiReq);

			break;

		case MPI_IOCSTATUS_SCSI_DATA_OVERRUN:		/* 0x0044 */
			sc->resid=0;
		case MPI_IOCSTATUS_SCSI_RECOVERED_ERROR:	/* 0x0040 */
		case MPI_IOCSTATUS_SUCCESS:			/* 0x0000 */
			if (scsi_status == MPI_SCSI_STATUS_BUSY)
				sc->result = (DID_BUS_BUSY << 16) | scsi_status;
			else
				sc->result = (DID_OK << 16) | scsi_status;
			if (scsi_state == 0) {
				;
			} else if (scsi_state & MPI_SCSI_STATE_AUTOSENSE_VALID) {
				/*
				 * If running against circa 200003dd 909 MPT f/w,
				 * may get this (AUTOSENSE_VALID) for actual TASK_SET_FULL
				 * (QUEUE_FULL) returned from device! --> get 0x0000?128
				 * and with SenseBytes set to 0.
				 */
				if (pScsiReply->SCSIStatus == MPI_SCSI_STATUS_TASK_SET_FULL)
					mptscsih_report_queue_full(sc, pScsiReply, pScsiReq);

			}
			else if (scsi_state &
			         (MPI_SCSI_STATE_AUTOSENSE_FAILED | MPI_SCSI_STATE_NO_SCSI_STATUS)
			   ) {
				/*
				 * What to do?
				 */
				sc->result = DID_SOFT_ERROR << 16;
			}
			else if (scsi_state & MPI_SCSI_STATE_TERMINATED) {
				/*  Not real sure here either...  */
				sc->result = DID_RESET << 16;
			}
			else if (scsi_state & MPI_SCSI_STATE_QUEUE_TAG_REJECTED) {
				/* Device Inq. data indicates that it supports
				 * QTags, but rejects QTag messages.
				 * This command completed OK.
				 *
				 * Not real sure here either so do nothing...  */
			}

			if (sc->result == MPI_SCSI_STATUS_TASK_SET_FULL)
				mptscsih_report_queue_full(sc, pScsiReply, pScsiReq);

			/* Add handling of:
			 * Reservation Conflict, Busy,
			 * Command Terminated, CHECK
			 */
			break;

		case MPI_IOCSTATUS_SCSI_PROTOCOL_ERROR:		/* 0x0047 */
			sc->result = DID_SOFT_ERROR << 16;
			break;

		case MPI_IOCSTATUS_INVALID_FUNCTION:		/* 0x0001 */
		case MPI_IOCSTATUS_INVALID_SGL:			/* 0x0003 */
		case MPI_IOCSTATUS_INTERNAL_ERROR:		/* 0x0004 */
		case MPI_IOCSTATUS_RESERVED:			/* 0x0005 */
		case MPI_IOCSTATUS_INSUFFICIENT_RESOURCES:	/* 0x0006 */
		case MPI_IOCSTATUS_INVALID_FIELD:		/* 0x0007 */
		case MPI_IOCSTATUS_INVALID_STATE:		/* 0x0008 */
		case MPI_IOCSTATUS_SCSI_IO_DATA_ERROR:		/* 0x0046 */
		case MPI_IOCSTATUS_SCSI_TASK_MGMT_FAILED:	/* 0x004A */
		default:
			/*
			 * What to do?
			 */
			sc->result = DID_SOFT_ERROR << 16;
			break;

		}	/* switch(status) */

		dreplyprintk((KERN_NOTICE "  sc->result is %08xh\n", sc->result));
	} /* end of address reply case */

	/* Unmap the DMA buffers, if any. */
	if (sc->use_sg) {
		pci_unmap_sg(ioc->pcidev, (struct scatterlist *) sc->request_buffer,
			    sc->use_sg, sc->sc_data_direction);
	} else if (sc->request_bufflen) {
		pci_unmap_single(ioc->pcidev, sc->SCp.dma_handle,
				sc->request_bufflen, sc->sc_data_direction);
	}

	hd->ScsiLookup[req_idx] = NULL;

	sc->scsi_done(sc);		/* Issue the command callback */

	/* Free Chain buffers */
	mptscsih_freeChainBuffers(ioc, req_idx);
	return 1;
}

/*
 *	mptscsih_flush_running_cmds - For each command found, search
 *		Scsi_Host instance taskQ and reply to OS.
 *		Called only if recovering from a FW reload.
 *	@hd: Pointer to a SCSI HOST structure
 *
 *	Returns: None.
 *
 *	Must be called while new I/Os are being queued.
 */
static void
mptscsih_flush_running_cmds(MPT_SCSI_HOST *hd)
{
	MPT_ADAPTER *ioc = hd->ioc;
	struct scsi_cmnd	*SCpnt;
	MPT_FRAME_HDR	*mf;
	int		 ii;
	int		 max = ioc->req_depth;

	dprintk((KERN_INFO MYNAM ": flush_ScsiLookup called\n"));
	for (ii= 0; ii < max; ii++) {
		if ((SCpnt = hd->ScsiLookup[ii]) != NULL) {

			/* Command found.
			 */

			/* Null ScsiLookup index
			 */
			hd->ScsiLookup[ii] = NULL;

			mf = MPT_INDEX_2_MFPTR(ioc, ii);
			dmfprintk(( "flush: ScsiDone (mf=%p,sc=%p)\n",
					mf, SCpnt));

			/* Set status, free OS resources (SG DMA buffers)
			 * Do OS callback
			 * Free driver resources (chain, msg buffers)
			 */
			if (SCpnt->use_sg) {
				pci_unmap_sg(ioc->pcidev,
					(struct scatterlist *) SCpnt->request_buffer,
					SCpnt->use_sg,
					SCpnt->sc_data_direction);
			} else if (SCpnt->request_bufflen) {
				pci_unmap_single(ioc->pcidev,
					SCpnt->SCp.dma_handle,
					SCpnt->request_bufflen,
					SCpnt->sc_data_direction);
			}
			SCpnt->result = DID_RESET << 16;
			SCpnt->host_scribble = NULL;

			/* Free Chain buffers */
			mptscsih_freeChainBuffers(ioc, ii);

			/* Free Message frames */
			mpt_free_msg_frame(ioc, mf);

			SCpnt->scsi_done(SCpnt);	/* Issue the command callback */
		}
	}

	return;
}

/*
 *	mptscsih_search_running_cmds - Delete any commands associated
 *		with the specified target and lun. Function called only
 *		when a lun is disable by mid-layer.
 *		Do NOT access the referenced scsi_cmnd structure or
 *		members. Will cause either a paging or NULL ptr error.
 *		(BUT, BUT, BUT, the code does reference it! - mdr)
 *      @hd: Pointer to a SCSI HOST structure
 *	@vdevice: per device private data
 *
 *	Returns: None.
 *
 *	Called from slave_destroy.
 */
static void
mptscsih_search_running_cmds(MPT_SCSI_HOST *hd, VirtDevice *vdevice)
{
	SCSIIORequest_t	*mf = NULL;
	int		 ii;
	int		 max = hd->ioc->req_depth;
	struct scsi_cmnd *sc;

	dsprintk((KERN_INFO MYNAM ": search_running target %d lun %d max %d\n",
			vdevice->vtarget->target_id, vdevice->lun, max));

	for (ii=0; ii < max; ii++) {
		if ((sc = hd->ScsiLookup[ii]) != NULL) {

			mf = (SCSIIORequest_t *)MPT_INDEX_2_MFPTR(hd->ioc, ii);

			dsprintk(( "search_running: found (sc=%p, mf = %p) target %d, lun %d \n",
					hd->ScsiLookup[ii], mf, mf->TargetID, mf->LUN[1]));

			if ((mf->TargetID != ((u8)vdevice->vtarget->target_id)) || (mf->LUN[1] != ((u8) vdevice->lun)))
				continue;

			/* Cleanup
			 */
			hd->ScsiLookup[ii] = NULL;
			mptscsih_freeChainBuffers(hd->ioc, ii);
			mpt_free_msg_frame(hd->ioc, (MPT_FRAME_HDR *)mf);
			if (sc->use_sg) {
				pci_unmap_sg(hd->ioc->pcidev,
				(struct scatterlist *) sc->request_buffer,
					sc->use_sg,
					sc->sc_data_direction);
			} else if (sc->request_bufflen) {
				pci_unmap_single(hd->ioc->pcidev,
					sc->SCp.dma_handle,
					sc->request_bufflen,