mptscsih.c

linux 内核源代码

				/* 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) */

#ifdef CONFIG_FUSION_LOGGING
		if (sc->result && (ioc->debug_level & MPT_DEBUG_REPLY))
			mptscsih_info_scsiio(ioc, sc, pScsiReply);
#endif

	} /* end of address reply case */

	/* Unmap the DMA buffers, if any. */
	scsi_dma_unmap(sc);

	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 *sc;
	SCSIIORequest_t	*mf = NULL;
	int		 ii;
	int		 channel, id;

	for (ii= 0; ii < ioc->req_depth; ii++) {
		sc = mptscsih_getclear_scsi_lookup(ioc, ii);
		if (!sc)
			continue;
		mf = (SCSIIORequest_t *)MPT_INDEX_2_MFPTR(ioc, ii);
		if (!mf)
			continue;
		channel = mf->Bus;
		id = mf->TargetID;
		mptscsih_freeChainBuffers(ioc, ii);
		mpt_free_msg_frame(ioc, (MPT_FRAME_HDR *)mf);
		if ((unsigned char *)mf != sc->host_scribble)
			continue;
		scsi_dma_unmap(sc);
		sc->result = DID_RESET << 16;
		sc->host_scribble = NULL;
		sdev_printk(KERN_INFO, sc->device, MYIOC_s_FMT
		    "completing cmds: fw_channel %d, fw_id %d, sc=%p,"
		    " mf = %p, idx=%x\n", ioc->name, channel, id, sc, mf, ii);
		sc->scsi_done(sc);
	}
}

/*
 *	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;
	struct scsi_cmnd *sc;
	struct scsi_lun  lun;
	MPT_ADAPTER *ioc = hd->ioc;
	unsigned long	flags;

	spin_lock_irqsave(&ioc->scsi_lookup_lock, flags);
	for (ii = 0; ii < ioc->req_depth; ii++) {
		if ((sc = ioc->ScsiLookup[ii]) != NULL) {

			mf = (SCSIIORequest_t *)MPT_INDEX_2_MFPTR(ioc, ii);
			if (mf == NULL)
				continue;
			/* If the device is a hidden raid component, then its
			 * expected that the mf->function will be RAID_SCSI_IO
			 */
			if (vdevice->vtarget->tflags &
			    MPT_TARGET_FLAGS_RAID_COMPONENT && mf->Function !=
			    MPI_FUNCTION_RAID_SCSI_IO_PASSTHROUGH)
				continue;

			int_to_scsilun(vdevice->lun, &lun);
			if ((mf->Bus != vdevice->vtarget->channel) ||
			    (mf->TargetID != vdevice->vtarget->id) ||
			    memcmp(lun.scsi_lun, mf->LUN, 8))
				continue;

			if ((unsigned char *)mf != sc->host_scribble)
				continue;
			ioc->ScsiLookup[ii] = NULL;
			spin_unlock_irqrestore(&ioc->scsi_lookup_lock, flags);
			mptscsih_freeChainBuffers(ioc, ii);
			mpt_free_msg_frame(ioc, (MPT_FRAME_HDR *)mf);
			scsi_dma_unmap(sc);
			sc->host_scribble = NULL;
			sc->result = DID_NO_CONNECT << 16;
			sdev_printk(KERN_INFO, sc->device, MYIOC_s_FMT "completing cmds: fw_channel %d,"
			   "fw_id %d, sc=%p, mf = %p, idx=%x\n", ioc->name, vdevice->vtarget->channel,
			   vdevice->vtarget->id, sc, mf, ii);
			sc->scsi_done(sc);
			spin_lock_irqsave(&ioc->scsi_lookup_lock, flags);
		}
	}
	spin_unlock_irqrestore(&ioc->scsi_lookup_lock, flags);
	return;
}

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

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/*
 *	mptscsih_report_queue_full - Report QUEUE_FULL status returned
 *	from a SCSI target device.
 *	@sc: Pointer to scsi_cmnd structure
 *	@pScsiReply: Pointer to SCSIIOReply_t
 *	@pScsiReq: Pointer to original SCSI request
 *
 *	This routine periodically reports QUEUE_FULL status returned from a
 *	SCSI target device.  It reports this to the console via kernel
 *	printk() API call, not more than once every 10 seconds.
 */
static void
mptscsih_report_queue_full(struct scsi_cmnd *sc, SCSIIOReply_t *pScsiReply, SCSIIORequest_t *pScsiReq)
{
	long time = jiffies;
	MPT_SCSI_HOST		*hd;
	MPT_ADAPTER	*ioc;

	if (sc->device == NULL)
		return;
	if (sc->device->host == NULL)
		return;
	if ((hd = shost_priv(sc->device->host)) == NULL)
		return;
	ioc = hd->ioc;
	if (time - hd->last_queue_full > 10 * HZ) {
		dprintk(ioc, printk(MYIOC_s_WARN_FMT "Device (%d:%d:%d) reported QUEUE_FULL!\n",
				ioc->name, 0, sc->device->id, sc->device->lun));
		hd->last_queue_full = time;
	}
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/*
 *	mptscsih_remove - Removed scsi devices
 *	@pdev: Pointer to pci_dev structure
 *
 *
 */
void
mptscsih_remove(struct pci_dev *pdev)
{
	MPT_ADAPTER 		*ioc = pci_get_drvdata(pdev);
	struct Scsi_Host 	*host = ioc->sh;
	MPT_SCSI_HOST		*hd;
	int sz1;

	if(!host) {
		mpt_detach(pdev);
		return;
	}

	scsi_remove_host(host);

	if((hd = shost_priv(host)) == NULL)
		return;

	mptscsih_shutdown(pdev);

	sz1=0;

	if (ioc->ScsiLookup != NULL) {
		sz1 = ioc->req_depth * sizeof(void *);
		kfree(ioc->ScsiLookup);
		ioc->ScsiLookup = NULL;
	}

	dprintk(ioc, printk(MYIOC_s_DEBUG_FMT
	    "Free'd ScsiLookup (%d) memory\n",
	    ioc->name, sz1));

	kfree(hd->info_kbuf);

	/* NULL the Scsi_Host pointer
	 */
	ioc->sh = NULL;

	scsi_host_put(host);

	mpt_detach(pdev);

}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/*
 *	mptscsih_shutdown - reboot notifier
 *
 */
void
mptscsih_shutdown(struct pci_dev *pdev)
{
}

#ifdef CONFIG_PM
/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/*
 *	mptscsih_suspend - Fusion MPT scsi driver suspend routine.
 *
 *
 */
int
mptscsih_suspend(struct pci_dev *pdev, pm_message_t state)
{
	mptscsih_shutdown(pdev);
	return mpt_suspend(pdev,state);
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/*
 *	mptscsih_resume - Fusion MPT scsi driver resume routine.
 *
 *
 */
int
mptscsih_resume(struct pci_dev *pdev)
{
	return mpt_resume(pdev);
}

#endif

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/**
 *	mptscsih_info - Return information about MPT adapter
 *	@SChost: Pointer to Scsi_Host structure
 *
 *	(linux scsi_host_template.info routine)
 *
 *	Returns pointer to buffer where information was written.
 */
const char *
mptscsih_info(struct Scsi_Host *SChost)
{
	MPT_SCSI_HOST *h;
	int size = 0;

	h = shost_priv(SChost);

	if (h) {
		if (h->info_kbuf == NULL)
			if ((h->info_kbuf = kmalloc(0x1000 /* 4Kb */, GFP_KERNEL)) == NULL)
				return h->info_kbuf;
		h->info_kbuf[0] = '\0';

		mpt_print_ioc_summary(h->ioc, h->info_kbuf, &size, 0, 0);
		h->info_kbuf[size-1] = '\0';
	}

	return h->info_kbuf;
}

struct info_str {
	char *buffer;
	int   length;
	int   offset;
	int   pos;
};

static void
mptscsih_copy_mem_info(struct info_str *info, char *data, int len)
{
	if (info->pos + len > info->length)
		len = info->length - info->pos;

	if (info->pos + len < info->offset) {
		info->pos += len;
		return;
	}

	if (info->pos < info->offset) {
	        data += (info->offset - info->pos);
	        len  -= (info->offset - info->pos);
	}

	if (len > 0) {
                memcpy(info->buffer + info->pos, data, len);
                info->pos += len;
	}
}

static int
mptscsih_copy_info(struct info_str *info, char *fmt, ...)
{
	va_list args;
	char buf[81];
	int len;

	va_start(args, fmt);
	len = vsprintf(buf, fmt, args);
	va_end(args);

	mptscsih_copy_mem_info(info, buf, len);
	return len;
}

static int
mptscsih_host_info(MPT_ADAPTER *ioc, char *pbuf, off_t offset, int len)
{
	struct info_str info;

	info.buffer	= pbuf;
	info.length	= len;
	info.offset	= offset;
	info.pos	= 0;

	mptscsih_copy_info(&info, "%s: %s, ", ioc->name, ioc->prod_name);
	mptscsih_copy_info(&info, "%s%08xh, ", MPT_FW_REV_MAGIC_ID_STRING, ioc->facts.FWVersion.Word);
	mptscsih_copy_info(&info, "Ports=%d, ", ioc->facts.NumberOfPorts);
	mptscsih_copy_info(&info, "MaxQ=%d\n", ioc->req_depth);

	return ((info.pos > info.offset) ? info.pos - info.offset : 0);
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/**
 *	mptscsih_proc_info - Return information about MPT adapter
 * 	@host:   scsi host struct
 * 	@buffer: if write, user data; if read, buffer for user
 *	@start: returns the buffer address
 * 	@offset: if write, 0; if read, the current offset into the buffer from
 * 		 the previous read.
 * 	@length: if write, return length;
 *	@func:   write = 1; read = 0
 *
 *	(linux scsi_host_template.info routine)
 */
int
mptscsih_proc_info(struct Scsi_Host *host, char *buffer, char **start, off_t offset,
			int length, int func)
{
	MPT_SCSI_HOST	*hd = shost_priv(host);
	MPT_ADAPTER	*ioc = hd->ioc;
	int size = 0;

	if (func) {
		/*
		 * write is not supported
		 */
	} else {
		if (start)
			*start = buffer;

		size = mptscsih_host_info(ioc, buffer, offset, length);
	}

	return size;
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
#define ADD_INDEX_LOG(req_ent)	do { } while(0)

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/**
 *	mptscsih_qcmd - Primary Fusion MPT SCSI initiator IO start routine.
 *	@SCpnt: Pointer to scsi_cmnd structure
 *	@done: Pointer SCSI mid-layer IO completion function
 *
 *	(linux scsi_host_template.queuecommand routine)
 *	This is the primary SCSI IO start routine.  Create a MPI SCSIIORequest
 *	from a linux scsi_cmnd request and send it to the IOC.
 *
 *	Returns 0. (rtn value discarded by linux scsi mid-layer)
 */
int
mptscsih_qcmd(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
{
	MPT_SCSI_HOST		*hd;
	MPT_FRAME_HDR		*mf;
	SCSIIORequest_t		*pScsiReq;
	VirtDevice		*vdevice = SCpnt->device->hostdata;
	int	 lun;
	u32	 datalen;
	u32	 scsictl;
	u32	 scsidir;
	u32	 cmd_len;
	int	 my_idx;
	int	 ii;
	MPT_ADAPTER *ioc;

	hd = shost_priv(SCpnt->device->host);
	ioc = hd->ioc;
	lun = SCpnt->device->lun;
	SCpnt->scsi_done = done;

	dmfprintk(ioc, printk(MYIOC_s_DEBUG_FMT "qcmd: SCpnt=%p, done()=%p\n",
		ioc->name, SCpnt, done));