mptscsih.c

linux-2.6.15.6

	pScsiReq->LUN[1] = lun;
	pScsiReq->LUN[2] = 0;
	pScsiReq->LUN[3] = 0;
	pScsiReq->LUN[4] = 0;
	pScsiReq->LUN[5] = 0;
	pScsiReq->LUN[6] = 0;
	pScsiReq->LUN[7] = 0;
	pScsiReq->Control = cpu_to_le32(scsictl);

	/*
	 *  Write SCSI CDB into the message
	 */
	cmd_len = SCpnt->cmd_len;
	for (ii=0; ii < cmd_len; ii++)
		pScsiReq->CDB[ii] = SCpnt->cmnd[ii];

	for (ii=cmd_len; ii < 16; ii++)
		pScsiReq->CDB[ii] = 0;

	/* DataLength */
	pScsiReq->DataLength = cpu_to_le32(datalen);

	/* SenseBuffer low address */
	pScsiReq->SenseBufferLowAddr = cpu_to_le32(hd->ioc->sense_buf_low_dma
					   + (my_idx * MPT_SENSE_BUFFER_ALLOC));

	/* Now add the SG list
	 * Always have a SGE even if null length.
	 */
	if (datalen == 0) {
		/* Add a NULL SGE */
		mptscsih_add_sge((char *)&pScsiReq->SGL, MPT_SGE_FLAGS_SSIMPLE_READ | 0,
			(dma_addr_t) -1);
	} else {
		/* Add a 32 or 64 bit SGE */
		if (mptscsih_AddSGE(hd->ioc, SCpnt, pScsiReq, my_idx) != SUCCESS)
			goto fail;
	}

	hd->ScsiLookup[my_idx] = SCpnt;
	SCpnt->host_scribble = NULL;

#ifdef MPTSCSIH_ENABLE_DOMAIN_VALIDATION
	if (hd->ioc->bus_type == SCSI) {
		int dvStatus = hd->ioc->spi_data.dvStatus[pTarget->target_id];
		int issueCmd = 1;

		if (dvStatus || hd->ioc->spi_data.forceDv) {

			if ((dvStatus & MPT_SCSICFG_NEED_DV) ||
				(hd->ioc->spi_data.forceDv & MPT_SCSICFG_NEED_DV)) {
				unsigned long lflags;
				/* Schedule DV if necessary */
				spin_lock_irqsave(&dvtaskQ_lock, lflags);
				if (!dvtaskQ_active) {
					dvtaskQ_active = 1;
					spin_unlock_irqrestore(&dvtaskQ_lock, lflags);
					INIT_WORK(&dvTaskQ_task, mptscsih_domainValidation, (void *) hd);

					schedule_work(&dvTaskQ_task);
				} else {
					spin_unlock_irqrestore(&dvtaskQ_lock, lflags);
				}
				hd->ioc->spi_data.forceDv &= ~MPT_SCSICFG_NEED_DV;
			}

			/* Trying to do DV to this target, extend timeout.
			 * Wait to issue until flag is clear
			 */
			if (dvStatus & MPT_SCSICFG_DV_PENDING) {
				mod_timer(&SCpnt->eh_timeout, jiffies + 40 * HZ);
				issueCmd = 0;
			}

			/* Set the DV flags.
			 */
			if (dvStatus & MPT_SCSICFG_DV_NOT_DONE)
				mptscsih_set_dvflags(hd, pScsiReq);

			if (!issueCmd)
				goto fail;
		}
	}
#endif

	mpt_put_msg_frame(hd->ioc->DoneCtx, hd->ioc, mf);
	dmfprintk((MYIOC_s_INFO_FMT "Issued SCSI cmd (%p) mf=%p idx=%d\n",
			hd->ioc->name, SCpnt, mf, my_idx));
	DBG_DUMP_REQUEST_FRAME(mf)
	return 0;

 fail:
	hd->ScsiLookup[my_idx] = NULL;
	mptscsih_freeChainBuffers(hd->ioc, my_idx);
	mpt_free_msg_frame(hd->ioc, mf);
	return SCSI_MLQUEUE_HOST_BUSY;
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/*
 *	mptscsih_freeChainBuffers - Function to free chain buffers associated
 *	with a SCSI IO request
 *	@hd: Pointer to the MPT_SCSI_HOST instance
 *	@req_idx: Index of the SCSI IO request frame.
 *
 *	Called if SG chain buffer allocation fails and mptscsih callbacks.
 *	No return.
 */
static void
mptscsih_freeChainBuffers(MPT_ADAPTER *ioc, int req_idx)
{
	MPT_FRAME_HDR *chain;
	unsigned long flags;
	int chain_idx;
	int next;

	/* Get the first chain index and reset
	 * tracker state.
	 */
	chain_idx = ioc->ReqToChain[req_idx];
	ioc->ReqToChain[req_idx] = MPT_HOST_NO_CHAIN;

	while (chain_idx != MPT_HOST_NO_CHAIN) {

		/* Save the next chain buffer index */
		next = ioc->ChainToChain[chain_idx];

		/* Free this chain buffer and reset
		 * tracker
		 */
		ioc->ChainToChain[chain_idx] = MPT_HOST_NO_CHAIN;

		chain = (MPT_FRAME_HDR *) (ioc->ChainBuffer
					+ (chain_idx * ioc->req_sz));

		spin_lock_irqsave(&ioc->FreeQlock, flags);
		list_add_tail(&chain->u.frame.linkage.list, &ioc->FreeChainQ);
		spin_unlock_irqrestore(&ioc->FreeQlock, flags);

		dmfprintk((MYIOC_s_INFO_FMT "FreeChainBuffers (index %d)\n",
				ioc->name, chain_idx));

		/* handle next */
		chain_idx = next;
	}
	return;
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/*
 *	Reset Handling
 */

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/*
 *	mptscsih_TMHandler - Generic handler for SCSI Task Management.
 *	Fall through to mpt_HardResetHandler if: not operational, too many
 *	failed TM requests or handshake failure.
 *
 *	@ioc: Pointer to MPT_ADAPTER structure
 *	@type: Task Management type
 *	@target: Logical Target ID for reset (if appropriate)
 *	@lun: Logical Unit for reset (if appropriate)
 *	@ctx2abort: Context for the task to be aborted (if appropriate)
 *
 *	Remark: Currently invoked from a non-interrupt thread (_bh).
 *
 *	Remark: With old EH code, at most 1 SCSI TaskMgmt function per IOC
 *	will be active.
 *
 *	Returns 0 for SUCCESS or -1 if FAILED.
 */
static int
mptscsih_TMHandler(MPT_SCSI_HOST *hd, u8 type, u8 channel, u8 target, u8 lun, int ctx2abort, ulong timeout)
{
	MPT_ADAPTER	*ioc;
	int		 rc = -1;
	int		 doTask = 1;
	u32		 ioc_raw_state;
	unsigned long	 flags;

	/* If FW is being reloaded currently, return success to
	 * the calling function.
	 */
	if (hd == NULL)
		return 0;

	ioc = hd->ioc;
	if (ioc == NULL) {
		printk(KERN_ERR MYNAM " TMHandler" " NULL ioc!\n");
		return FAILED;
	}
	dtmprintk((MYIOC_s_INFO_FMT "TMHandler Entered!\n", ioc->name));

	// SJR - CHECKME - Can we avoid this here?
	// (mpt_HardResetHandler has this check...)
	spin_lock_irqsave(&ioc->diagLock, flags);
	if ((ioc->diagPending) || (ioc->alt_ioc && ioc->alt_ioc->diagPending)) {
		spin_unlock_irqrestore(&ioc->diagLock, flags);
		return FAILED;
	}
	spin_unlock_irqrestore(&ioc->diagLock, flags);

	/*  Wait a fixed amount of time for the TM pending flag to be cleared.
	 *  If we time out and not bus reset, then we return a FAILED status to the caller.
	 *  The call to mptscsih_tm_pending_wait() will set the pending flag if we are
	 *  successful. Otherwise, reload the FW.
	 */
	if (mptscsih_tm_pending_wait(hd) == FAILED) {
		if (type == MPI_SCSITASKMGMT_TASKTYPE_ABORT_TASK) {
			dtmprintk((KERN_INFO MYNAM ": %s: TMHandler abort: "
			   "Timed out waiting for last TM (%d) to complete! \n",
			   hd->ioc->name, hd->tmPending));
			return FAILED;
		} else if (type == MPI_SCSITASKMGMT_TASKTYPE_TARGET_RESET) {
			dtmprintk((KERN_INFO MYNAM ": %s: TMHandler target reset: "
			   "Timed out waiting for last TM (%d) to complete! \n",
			   hd->ioc->name, hd->tmPending));
			return FAILED;
		} else if (type == MPI_SCSITASKMGMT_TASKTYPE_RESET_BUS) {
			dtmprintk((KERN_INFO MYNAM ": %s: TMHandler bus reset: "
			   "Timed out waiting for last TM (%d) to complete! \n",
			   hd->ioc->name, hd->tmPending));
			if (hd->tmPending & (1 << MPI_SCSITASKMGMT_TASKTYPE_RESET_BUS))
				return FAILED;

			doTask = 0;
		}
	} else {
		spin_lock_irqsave(&hd->ioc->FreeQlock, flags);
		hd->tmPending |=  (1 << type);
		spin_unlock_irqrestore(&hd->ioc->FreeQlock, flags);
	}

	/* Is operational?
	 */
	ioc_raw_state = mpt_GetIocState(hd->ioc, 0);

#ifdef MPT_DEBUG_RESET
	if ((ioc_raw_state & MPI_IOC_STATE_MASK) != MPI_IOC_STATE_OPERATIONAL) {
		printk(MYIOC_s_WARN_FMT
			"TM Handler: IOC Not operational(0x%x)!\n",
			hd->ioc->name, ioc_raw_state);
	}
#endif

	if (doTask && ((ioc_raw_state & MPI_IOC_STATE_MASK) == MPI_IOC_STATE_OPERATIONAL)
				&& !(ioc_raw_state & MPI_DOORBELL_ACTIVE)) {

		/* Isse the Task Mgmt request.
		 */
		if (hd->hard_resets < -1)
			hd->hard_resets++;
		rc = mptscsih_IssueTaskMgmt(hd, type, channel, target, lun, ctx2abort, timeout);
		if (rc) {
			printk(MYIOC_s_INFO_FMT "Issue of TaskMgmt failed!\n", hd->ioc->name);
		} else {
			dtmprintk((MYIOC_s_INFO_FMT "Issue of TaskMgmt Successful!\n", hd->ioc->name));
		}
	}

	/* Only fall through to the HRH if this is a bus reset
	 */
	if ((type == MPI_SCSITASKMGMT_TASKTYPE_RESET_BUS) && (rc ||
		ioc->reload_fw || (ioc->alt_ioc && ioc->alt_ioc->reload_fw))) {
		dtmprintk((MYIOC_s_INFO_FMT "Calling HardReset! \n",
			 hd->ioc->name));
		rc = mpt_HardResetHandler(hd->ioc, CAN_SLEEP);
	}

	dtmprintk((MYIOC_s_INFO_FMT "TMHandler rc = %d!\n", hd->ioc->name, rc));

	return rc;
}


/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/*
 *	mptscsih_IssueTaskMgmt - Generic send Task Management function.
 *	@hd: Pointer to MPT_SCSI_HOST structure
 *	@type: Task Management type
 *	@target: Logical Target ID for reset (if appropriate)
 *	@lun: Logical Unit for reset (if appropriate)
 *	@ctx2abort: Context for the task to be aborted (if appropriate)
 *
 *	Remark: _HardResetHandler can be invoked from an interrupt thread (timer)
 *	or a non-interrupt thread.  In the former, must not call schedule().
 *
 *	Not all fields are meaningfull for all task types.
 *
 *	Returns 0 for SUCCESS, -999 for "no msg frames",
 *	else other non-zero value returned.
 */
static int
mptscsih_IssueTaskMgmt(MPT_SCSI_HOST *hd, u8 type, u8 channel, u8 target, u8 lun, int ctx2abort, ulong timeout)
{
	MPT_FRAME_HDR	*mf;
	SCSITaskMgmt_t	*pScsiTm;
	int		 ii;
	int		 retval;

	/* Return Fail to calling function if no message frames available.
	 */
	if ((mf = mpt_get_msg_frame(hd->ioc->TaskCtx, hd->ioc)) == NULL) {
		dfailprintk((MYIOC_s_ERR_FMT "IssueTaskMgmt, no msg frames!!\n",
				hd->ioc->name));
		return FAILED;
	}
	dtmprintk((MYIOC_s_INFO_FMT "IssueTaskMgmt request @ %p\n",
			hd->ioc->name, mf));

	/* Format the Request
	 */
	pScsiTm = (SCSITaskMgmt_t *) mf;
	pScsiTm->TargetID = target;
	pScsiTm->Bus = channel;
	pScsiTm->ChainOffset = 0;
	pScsiTm->Function = MPI_FUNCTION_SCSI_TASK_MGMT;

	pScsiTm->Reserved = 0;
	pScsiTm->TaskType = type;
	pScsiTm->Reserved1 = 0;
	pScsiTm->MsgFlags = (type == MPI_SCSITASKMGMT_TASKTYPE_RESET_BUS)
                    ? MPI_SCSITASKMGMT_MSGFLAGS_LIPRESET_RESET_OPTION : 0;

	for (ii= 0; ii < 8; ii++) {
		pScsiTm->LUN[ii] = 0;
	}
	pScsiTm->LUN[1] = lun;

	for (ii=0; ii < 7; ii++)
		pScsiTm->Reserved2[ii] = 0;

	pScsiTm->TaskMsgContext = ctx2abort;

	dtmprintk((MYIOC_s_INFO_FMT "IssueTaskMgmt: ctx2abort (0x%08x) type=%d\n",
			hd->ioc->name, ctx2abort, type));

	DBG_DUMP_TM_REQUEST_FRAME((u32 *)pScsiTm);

	if ((retval = mpt_send_handshake_request(hd->ioc->TaskCtx, hd->ioc,
		sizeof(SCSITaskMgmt_t), (u32*)pScsiTm,
		CAN_SLEEP)) != 0) {
		dfailprintk((MYIOC_s_ERR_FMT "_send_handshake FAILED!"
			" (hd %p, ioc %p, mf %p) \n", hd->ioc->name, hd,
			hd->ioc, mf));
		mpt_free_msg_frame(hd->ioc, mf);
		return retval;
	}

	if(mptscsih_tm_wait_for_completion(hd, timeout) == FAILED) {
		dfailprintk((MYIOC_s_ERR_FMT "_wait_for_completion FAILED!"
			" (hd %p, ioc %p, mf %p) \n", hd->ioc->name, hd,
			hd->ioc, mf));
		mpt_free_msg_frame(hd->ioc, mf);
		dtmprintk((MYIOC_s_INFO_FMT "Calling HardReset! \n",
			 hd->ioc->name));
		retval = mpt_HardResetHandler(hd->ioc, CAN_SLEEP);
	}

	return retval;
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/**
 *	mptscsih_abort - Abort linux scsi_cmnd routine, new_eh variant
 *	@SCpnt: Pointer to scsi_cmnd structure, IO to be aborted
 *
 *	(linux scsi_host_template.eh_abort_handler routine)
 *
 *	Returns SUCCESS or FAILED.
 */
int
mptscsih_abort(struct scsi_cmnd * SCpnt)
{
	MPT_SCSI_HOST	*hd;
	MPT_ADAPTER	*ioc;
	MPT_FRAME_HDR	*mf;
	u32		 ctx2abort;
	int		 scpnt_idx;
	int		 retval;

	/* If we can't locate our host adapter structure, return FAILED status.
	 */
	if ((hd = (MPT_SCSI_HOST *) SCpnt->device->host->hostdata) == NULL) {
		SCpnt->result = DID_RESET << 16;
		SCpnt->scsi_done(SCpnt);
		dfailprintk((KERN_INFO MYNAM ": mptscsih_abort: "
			   "Can't locate host! (sc=%p)\n",
			   SCpnt));
		return FAILED;
	}

	ioc = hd->ioc;
	if (hd->resetPending) {
		return FAILED;
	}

	if (hd->timeouts < -1)
		hd->timeouts++;

	/* Find this command
	 */
	if ((scpnt_idx = SCPNT_TO_LOOKUP_IDX(SCpnt)) < 0) {
		/* Cmd not found in ScsiLookup.
		 * Do OS callback.
		 */
		SCpnt->result = DID_RESET << 16;
		dtmprintk((KERN_INFO MYNAM ": %s: mptscsih_abort: "
			   "Command not in the active list! (sc=%p)\n",
			   hd->ioc->name, SCpnt));
		return SUCCESS;
	}

	printk(KERN_WARNING MYNAM ": %s: attempting task abort! (sc=%p)\n",
	       hd->ioc->name, SCpnt);
	scsi_print_command(SCpnt);

	/* Most important!  Set TaskMsgContext to SCpnt's MsgContext!
	 * (the IO to be ABORT'd)
	 *
	 * NOTE: Since we do not byteswap MsgContext, we do not
	 *	 swap it here either.  It is an opaque cookie to
	 *	 the controller, so it does not matter. -DaveM
	 */
	mf = MPT_INDEX_2_MFPTR(hd->ioc, scpnt_idx);
	ctx2abort = mf->u.frame.hwhdr.msgctxu.MsgContext;

	hd->abortSCpnt = SCpnt;

	retval = mptscsih_TMHandler(hd, MPI_SCSITASKMGMT_TASKTYPE_ABORT_TASK,
		SCpnt->device->channel, SCpnt->device->id, SCpnt->device->lun,
		ctx2abort, 2 /* 2 second timeout */);

	printk (KERN_WARNING MYNAM ": %s: task abort: %s (sc=%p)\n",
		hd->ioc->name,
		((retval == 0) ? "SUCCESS" : "FAILED" ), SCpnt);

	if (retval == 0)
		return SUCCESS;

	if(retval != FAILED ) {
		hd->tmPending = 0;
		hd->tmState = TM_STATE_NONE;
	}
	return FAILED;
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/**
 *	mptscsih_dev_reset - Perform a SCSI TARGET_RESET!  new_eh variant
 *	@SCpnt: Pointer to scsi_cmnd structure, IO which reset is due to
 *
 *	(linux scsi_host_template.eh_dev_reset_handler routine)