mptscsih.c

linux-2.6.15.6

 *
 *	Returns SUCCESS or FAILED.
 */
int
mptscsih_dev_reset(struct scsi_cmnd * SCpnt)
{
	MPT_SCSI_HOST	*hd;
	int		 retval;

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

	if (hd->resetPending)
		return FAILED;

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

	retval = mptscsih_TMHandler(hd, MPI_SCSITASKMGMT_TASKTYPE_TARGET_RESET,
		SCpnt->device->channel, SCpnt->device->id,
		0, 0, 5 /* 5 second timeout */);

	printk (KERN_WARNING MYNAM ": %s: target reset: %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_bus_reset - Perform a SCSI BUS_RESET!	new_eh variant
 *	@SCpnt: Pointer to scsi_cmnd structure, IO which reset is due to
 *
 *	(linux scsi_host_template.eh_bus_reset_handler routine)
 *
 *	Returns SUCCESS or FAILED.
 */
int
mptscsih_bus_reset(struct scsi_cmnd * SCpnt)
{
	MPT_SCSI_HOST	*hd;
	int		 retval;

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

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

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

	retval = mptscsih_TMHandler(hd, MPI_SCSITASKMGMT_TASKTYPE_RESET_BUS,
		SCpnt->device->channel, 0, 0, 0, 5 /* 5 second timeout */);

	printk (KERN_WARNING MYNAM ": %s: bus reset: %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_host_reset - Perform a SCSI host adapter RESET!
 *	new_eh variant
 *	@SCpnt: Pointer to scsi_cmnd structure, IO which reset is due to
 *
 *	(linux scsi_host_template.eh_host_reset_handler routine)
 *
 *	Returns SUCCESS or FAILED.
 */
int
mptscsih_host_reset(struct scsi_cmnd *SCpnt)
{
	MPT_SCSI_HOST *  hd;
	int              status = SUCCESS;

	/*  If we can't locate the host to reset, then we failed. */
	if ((hd = (MPT_SCSI_HOST *) SCpnt->device->host->hostdata) == NULL){
		dtmprintk( ( KERN_INFO MYNAM ": mptscsih_host_reset: "
			     "Can't locate host! (sc=%p)\n",
			     SCpnt ) );
		return FAILED;
	}

	printk(KERN_WARNING MYNAM ": %s: Attempting host reset! (sc=%p)\n",
	       hd->ioc->name, SCpnt);

	/*  If our attempts to reset the host failed, then return a failed
	 *  status.  The host will be taken off line by the SCSI mid-layer.
	 */
	if (mpt_HardResetHandler(hd->ioc, CAN_SLEEP) < 0){
		status = FAILED;
	} else {
		/*  Make sure TM pending is cleared and TM state is set to
		 *  NONE.
		 */
		hd->tmPending = 0;
		hd->tmState = TM_STATE_NONE;
	}

	dtmprintk( ( KERN_INFO MYNAM ": mptscsih_host_reset: "
		     "Status = %s\n",
		     (status == SUCCESS) ? "SUCCESS" : "FAILED" ) );

	return status;
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/**
 *	mptscsih_tm_pending_wait - wait for pending task management request to
 *		complete.
 *	@hd: Pointer to MPT host structure.
 *
 *	Returns {SUCCESS,FAILED}.
 */
static int
mptscsih_tm_pending_wait(MPT_SCSI_HOST * hd)
{
	unsigned long  flags;
	int            loop_count = 4 * 10;  /* Wait 10 seconds */
	int            status = FAILED;

	do {
		spin_lock_irqsave(&hd->ioc->FreeQlock, flags);
		if (hd->tmState == TM_STATE_NONE) {
			hd->tmState = TM_STATE_IN_PROGRESS;
			hd->tmPending = 1;
			spin_unlock_irqrestore(&hd->ioc->FreeQlock, flags);
			status = SUCCESS;
			break;
		}
		spin_unlock_irqrestore(&hd->ioc->FreeQlock, flags);
		msleep(250);
	} while (--loop_count);

	return status;
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/**
 *	mptscsih_tm_wait_for_completion - wait for completion of TM task
 *	@hd: Pointer to MPT host structure.
 *
 *	Returns {SUCCESS,FAILED}.
 */
static int
mptscsih_tm_wait_for_completion(MPT_SCSI_HOST * hd, ulong timeout )
{
	unsigned long  flags;
	int            loop_count = 4 * timeout;
	int            status = FAILED;

	do {
		spin_lock_irqsave(&hd->ioc->FreeQlock, flags);
		if(hd->tmPending == 0) {
			status = SUCCESS;
 			spin_unlock_irqrestore(&hd->ioc->FreeQlock, flags);
			break;
		}
		spin_unlock_irqrestore(&hd->ioc->FreeQlock, flags);
		msleep_interruptible(250);
	} while (--loop_count);

	return status;
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/**
 *	mptscsih_taskmgmt_complete - Registered with Fusion MPT base driver
 *	@ioc: Pointer to MPT_ADAPTER structure
 *	@mf: Pointer to SCSI task mgmt request frame
 *	@mr: Pointer to SCSI task mgmt reply frame
 *
 *	This routine is called from mptbase.c::mpt_interrupt() at the completion
 *	of any SCSI task management request.
 *	This routine is registered with the 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_taskmgmt_complete(MPT_ADAPTER *ioc, MPT_FRAME_HDR *mf, MPT_FRAME_HDR *mr)
{
	SCSITaskMgmtReply_t	*pScsiTmReply;
	SCSITaskMgmt_t		*pScsiTmReq;
	MPT_SCSI_HOST		*hd;
	unsigned long		 flags;
	u16			 iocstatus;
	u8			 tmType;

	dtmprintk((MYIOC_s_WARN_FMT "TaskMgmt completed (mf=%p,mr=%p)\n",
			ioc->name, mf, mr));
	if (ioc->sh) {
		/* Depending on the thread, a timer is activated for
		 * the TM request.  Delete this timer on completion of TM.
		 * Decrement count of outstanding TM requests.
		 */
		hd = (MPT_SCSI_HOST *)ioc->sh->hostdata;
	} else {
		dtmprintk((MYIOC_s_WARN_FMT "TaskMgmt Complete: NULL Scsi Host Ptr\n",
			ioc->name));
		return 1;
	}

	if (mr == NULL) {
		dtmprintk((MYIOC_s_WARN_FMT "ERROR! TaskMgmt Reply: NULL Request %p\n",
			ioc->name, mf));
		return 1;
	} else {
		pScsiTmReply = (SCSITaskMgmtReply_t*)mr;
		pScsiTmReq = (SCSITaskMgmt_t*)mf;

		/* Figure out if this was ABORT_TASK, TARGET_RESET, or BUS_RESET! */
		tmType = pScsiTmReq->TaskType;

		dtmprintk((MYIOC_s_WARN_FMT "  TaskType = %d, TerminationCount=%d\n",
				ioc->name, tmType, le32_to_cpu(pScsiTmReply->TerminationCount)));
		DBG_DUMP_TM_REPLY_FRAME((u32 *)pScsiTmReply);

		iocstatus = le16_to_cpu(pScsiTmReply->IOCStatus) & MPI_IOCSTATUS_MASK;
		dtmprintk((MYIOC_s_WARN_FMT "  SCSI TaskMgmt (%d) IOCStatus=%04x IOCLogInfo=%08x\n",
			ioc->name, tmType, iocstatus, le32_to_cpu(pScsiTmReply->IOCLogInfo)));
		/* Error?  (anything non-zero?) */
		if (iocstatus) {

			/* clear flags and continue.
			 */
			if (tmType == MPI_SCSITASKMGMT_TASKTYPE_ABORT_TASK)
				hd->abortSCpnt = NULL;

			/* If an internal command is present
			 * or the TM failed - reload the FW.
			 * FC FW may respond FAILED to an ABORT
			 */
			if (tmType == MPI_SCSITASKMGMT_TASKTYPE_RESET_BUS) {
				if ((hd->cmdPtr) ||
				    (iocstatus == MPI_IOCSTATUS_SCSI_TASK_MGMT_FAILED)) {
					if (mpt_HardResetHandler(ioc, NO_SLEEP) < 0) {
						printk((KERN_WARNING
							" Firmware Reload FAILED!!\n"));
					}
				}
			}
		} else {
			dtmprintk((MYIOC_s_WARN_FMT " TaskMgmt SUCCESS\n", ioc->name));

			hd->abortSCpnt = NULL;

		}
	}

	spin_lock_irqsave(&ioc->FreeQlock, flags);
	hd->tmPending = 0;
	spin_unlock_irqrestore(&ioc->FreeQlock, flags);
	hd->tmState = TM_STATE_NONE;

	return 1;
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/*
 *	This is anyones guess quite frankly.
 */
int
mptscsih_bios_param(struct scsi_device * sdev, struct block_device *bdev,
		sector_t capacity, int geom[])
{
	int		heads;
	int		sectors;
	sector_t	cylinders;
	ulong 		dummy;

	heads = 64;
	sectors = 32;

	dummy = heads * sectors;
	cylinders = capacity;
	sector_div(cylinders,dummy);

	/*
	 * Handle extended translation size for logical drives
	 * > 1Gb
	 */
	if ((ulong)capacity >= 0x200000) {
		heads = 255;
		sectors = 63;
		dummy = heads * sectors;
		cylinders = capacity;
		sector_div(cylinders,dummy);
	}

	/* return result */
	geom[0] = heads;
	geom[1] = sectors;
	geom[2] = cylinders;

	dprintk((KERN_NOTICE
		": bios_param: Id=%i Lun=%i Channel=%i CHS=%i/%i/%i\n",
		sdev->id, sdev->lun,sdev->channel,(int)cylinders,heads,sectors));

	return 0;
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/*
 *	OS entry point to allow host driver to alloc memory
 *	for each scsi device. Called once per device the bus scan.
 *	Return non-zero if allocation fails.
 *	Init memory once per id (not LUN).
 */
int
mptscsih_slave_alloc(struct scsi_device *device)
{
	struct Scsi_Host	*host = device->host;
	MPT_SCSI_HOST		*hd = (MPT_SCSI_HOST *)host->hostdata;
	VirtDevice		*vdev;
	uint			target = device->id;

	if (hd == NULL)
		return -ENODEV;

	if ((vdev = hd->Targets[target]) != NULL)
		goto out;

	vdev = kmalloc(sizeof(VirtDevice), GFP_KERNEL);
	if (!vdev) {
		printk(MYIOC_s_ERR_FMT "slave_alloc kmalloc(%zd) FAILED!\n",
				hd->ioc->name, sizeof(VirtDevice));
		return -ENOMEM;
	}

	memset(vdev, 0, sizeof(VirtDevice));
	vdev->tflags = MPT_TARGET_FLAGS_Q_YES;
	vdev->ioc_id = hd->ioc->id;
	vdev->target_id = device->id;
	vdev->bus_id = device->channel;
	vdev->raidVolume = 0;
	hd->Targets[device->id] = vdev;
	if (hd->ioc->bus_type == SCSI) {
		if (hd->ioc->raid_data.isRaid & (1 << device->id)) {
			vdev->raidVolume = 1;
			ddvtprintk((KERN_INFO
			    "RAID Volume @ id %d\n", device->id));
		}
	} else {
		vdev->tflags |= MPT_TARGET_FLAGS_VALID_INQUIRY;
	}

 out:
	vdev->num_luns++;
	device->hostdata = vdev;
	return 0;
}

/*
 *	OS entry point to allow for host driver to free allocated memory
 *	Called if no device present or device being unloaded
 */
void
mptscsih_slave_destroy(struct scsi_device *device)
{
	struct Scsi_Host	*host = device->host;
	MPT_SCSI_HOST		*hd = (MPT_SCSI_HOST *)host->hostdata;
	VirtDevice		*vdev;
	uint			target = device->id;
	uint			lun = device->lun;

	if (hd == NULL)
		return;

	mptscsih_search_running_cmds(hd, target, lun);

	vdev = hd->Targets[target];
	vdev->luns[0] &= ~(1 << lun);
	if (--vdev->num_luns)
		return;

	kfree(hd->Targets[target]);
	hd->Targets[target] = NULL;

	if (hd->ioc->bus_type == SCSI) {
		if (mptscsih_is_phys_disk(hd->ioc, target)) {
			hd->ioc->spi_data.forceDv |= MPT_SCSICFG_RELOAD_IOC_PG3;
		} else {
			hd->ioc->spi_data.dvStatus[target] =
				MPT_SCSICFG_NEGOTIATE;

			if (!hd->negoNvram) {
				hd->ioc->spi_data.dvStatus[target] |=
					MPT_SCSICFG_DV_NOT_DONE;
			}
		}
	}
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/*
 *	mptscsih_change_queue_depth - This function will set a devices queue depth
 *	@sdev: per scsi_device pointer
 *	@qdepth: requested queue depth
 *
 *	Adding support for new 'change_queue_depth' api.
*/
int
mptscsih_change_queue_depth(struct scsi_device *sdev, int qdepth)
{
	MPT_SCSI_HOST	*hd = (MPT_SCSI_HOST *)sdev->host->hostdata;
	VirtDevice *pTarget;
	int	max_depth;
	int	tagged;

	if (hd == NULL)
		return 0;
	if (!(pTarget = hd->Targets[sdev->id]))
		return 0;

	if (hd->ioc->bus_type == SCSI) {
		if (pTarget->tflags & MPT_TARGET_FLAGS_VALID_INQUIRY) {
			if (!(pTarget->tflags & MPT_TARGET_FLAGS_Q_YES))
				max_depth = 1;