mptscsih.c

LINUX 2.6.17.4的源码

	}
	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;
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
static void
mptscsih_taskmgmt_response_code(MPT_ADAPTER *ioc, u8 response_code)
{
	char *desc;

	switch (response_code) {
	case MPI_SCSITASKMGMT_RSP_TM_COMPLETE:
		desc = "The task completed.";
		break;
	case MPI_SCSITASKMGMT_RSP_INVALID_FRAME:
		desc = "The IOC received an invalid frame status.";
		break;
	case MPI_SCSITASKMGMT_RSP_TM_NOT_SUPPORTED:
		desc = "The task type is not supported.";
		break;
	case MPI_SCSITASKMGMT_RSP_TM_FAILED:
		desc = "The requested task failed.";
		break;
	case MPI_SCSITASKMGMT_RSP_TM_SUCCEEDED:
		desc = "The task completed successfully.";
		break;
	case MPI_SCSITASKMGMT_RSP_TM_INVALID_LUN:
		desc = "The LUN request is invalid.";
		break;
	case MPI_SCSITASKMGMT_RSP_IO_QUEUED_ON_IOC:
		desc = "The task is in the IOC queue and has not been sent to target.";
		break;
	default:
		desc = "unknown";
		break;
	}
	printk(MYIOC_s_INFO_FMT "Response Code(0x%08x): F/W: %s\n",
		ioc->name, response_code, desc);
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/**
 *	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;

		if (ioc->facts.MsgVersion >= MPI_VERSION_01_05 &&
		    pScsiTmReply->ResponseCode)
			mptscsih_taskmgmt_response_code(ioc,
			    pScsiTmReply->ResponseCode);

		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;
}

/* Search IOC page 3 to determine if this is hidden physical disk
 *
 */
int
mptscsih_is_phys_disk(MPT_ADAPTER *ioc, int id)
{
	int i;

	if (!ioc->raid_data.isRaid || !ioc->raid_data.pIocPg3)
		return 0;
	for (i = 0; i < ioc->raid_data.pIocPg3->NumPhysDisks; i++) {
                if (id == ioc->raid_data.pIocPg3->PhysDisk[i].PhysDiskID)
                        return 1;
        }
        return 0;
}
EXPORT_SYMBOL(mptscsih_is_phys_disk);

int
mptscsih_raid_id_to_num(MPT_SCSI_HOST *hd, uint physdiskid)
{
	int i;

	if (!hd->ioc->raid_data.isRaid || !hd->ioc->raid_data.pIocPg3)
		return -ENXIO;

	for (i = 0; i < hd->ioc->raid_data.pIocPg3->NumPhysDisks; i++) {
		if (physdiskid ==
		    hd->ioc->raid_data.pIocPg3->PhysDisk[i].PhysDiskID)
			return hd->ioc->raid_data.pIocPg3->PhysDisk[i].PhysDiskNum;
	}

	return -ENXIO;
}
EXPORT_SYMBOL(mptscsih_raid_id_to_num);

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/*
 *	OS entry point to allow host driver to alloc memory
 *	for each scsi target. Called once per device the bus scan.
 *	Return non-zero if allocation fails.
 */
int
mptscsih_target_alloc(struct scsi_target *starget)
{
	VirtTarget		*vtarget;

	vtarget = kzalloc(sizeof(VirtTarget), GFP_KERNEL);
	if (!vtarget)
		return -ENOMEM;
	starget->hostdata = vtarget;
	vtarget->starget = starget;
	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.
 */
int
mptscsih_slave_alloc(struct scsi_device *sdev)
{
	struct Scsi_Host	*host = sdev->host;
	MPT_SCSI_HOST		*hd = (MPT_SCSI_HOST *)host->hostdata;
	VirtTarget		*vtarget;
	VirtDevice		*vdev;
	struct scsi_target 	*starget;

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

	vdev->lun = sdev->lun;
	sdev->hostdata = vdev;

	starget = scsi_target(sdev);
	vtarget = starget->hostdata;

	vdev->vtarget = vtarget;

	if (vtarget->num_luns == 0) {
		hd->Targets[sdev->id] = vtarget;
		vtarget->ioc_id = hd->ioc->id;
		vtarget->tflags = MPT_TARGET_FLAGS_Q_YES;
		vtarget->target_id = sdev->id;
		vtarget->bus_id = sdev->channel;
		if (hd->ioc->bus_type == SPI && sdev->channel == 0 &&
		    hd->ioc->raid_data.isRaid & (1 << sdev->id)) {
			vtarget->raidVolume = 1;
			ddvtprintk((KERN_INFO
				    "RAID Volume @ id %d\n", sdev->id));
		}
	}
	vtarget->num_luns++;
	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_target_destroy(struct scsi_target *starget)
{
	if (starget->hostdata)
		kfree(starget->hostdata);
	starget->hostdata = NULL;
}

/*
 *	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 *sdev)
{
	struct Scsi_Host	*host = sdev->host;
	MPT_SCSI_HOST		*hd = (MPT_SCSI_HOST *)host->hostdata;
	VirtTarget		*vtarget;
	VirtDevice		*vdevice;
	struct scsi_target 	*starget;

	starget = scsi_target(sdev);
	vtarget = starget->hostdata;
	vdevice = sdev->hostdata;

	mptscsih_search_running_cmds(hd, vdevice);
	vtarget->luns[0] &= ~(1 << vdevice->lun);
	vtarget->num_luns--;
	if (vtarget->num_luns == 0) {
		hd->Targets[sdev->id] = NULL;
	}
	mptscsih_synchronize_cache(hd, vdevice);
	kfree(vdevice);
	sdev->hostdata = NULL;
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/*
 *	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;
	VirtTarget 		*vtarget;
	struct scsi_target 	*starget;
	int			max_depth;
	int			tagged;

	starget = scsi_target(sdev);
	vtarget = starget->hostdata;

	if (hd->ioc->bus_type == SPI) {
		if (!(vtarget->tflags & MPT_TARGET_FLAGS_Q_YES))