mptscsih.c

LINUX 2.6.17.4的源码

					sc->sc_data_direction);
			}
			sc->host_scribble = NULL;
			sc->result = DID_NO_CONNECT << 16;
			sc->scsi_done(sc);
		}
	}
	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;

	if (sc->device == NULL)
		return;
	if (sc->device->host == NULL)
		return;
	if ((hd = (MPT_SCSI_HOST *)sc->device->host->hostdata) == NULL)
		return;

	if (time - hd->last_queue_full > 10 * HZ) {
		dprintk((MYIOC_s_WARN_FMT "Device (%d:%d:%d) reported QUEUE_FULL!\n",
				hd->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 = (MPT_SCSI_HOST *)host->hostdata) == NULL)
		return;

	mptscsih_shutdown(pdev);

	sz1=0;

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

	/*
	 * Free pointer array.
	 */
	kfree(hd->Targets);
	hd->Targets = NULL;

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

	kfree(hd->info_kbuf);

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

	scsi_host_put(host);

	mpt_detach(pdev);

}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/*
 *	mptscsih_shutdown - reboot notifier
 *
 */
void
mptscsih_shutdown(struct pci_dev *pdev)
{
	MPT_ADAPTER 		*ioc = pci_get_drvdata(pdev);
	struct Scsi_Host 	*host = ioc->sh;
	MPT_SCSI_HOST		*hd;

	if(!host)
		return;

	hd = (MPT_SCSI_HOST *)host->hostdata;

}

#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)
{
	MPT_ADAPTER 		*ioc = pci_get_drvdata(pdev);
	struct Scsi_Host 	*host = ioc->sh;
	MPT_SCSI_HOST		*hd;

	mpt_resume(pdev);

	if(!host)
		return 0;

	hd = (MPT_SCSI_HOST *)host->hostdata;
	if(!hd)
		return 0;

	return 0;
}

#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 = (MPT_SCSI_HOST *)SChost->hostdata;

	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
 *
 *	(linux scsi_host_template.info routine)
 *
 * 	buffer: if write, user data; if read, buffer for user
 * 	length: if write, return length;
 * 	offset: if write, 0; if read, the current offset into the buffer from
 * 		the previous read.
 * 	hostno: scsi host number
 *	func:   if write = 1; if read = 0
 */
int
mptscsih_proc_info(struct Scsi_Host *host, char *buffer, char **start, off_t offset,
			int length, int func)
{
	MPT_SCSI_HOST	*hd = (MPT_SCSI_HOST *)host->hostdata;
	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		*vdev = SCpnt->device->hostdata;
	int	 lun;
	u32	 datalen;
	u32	 scsictl;
	u32	 scsidir;
	u32	 cmd_len;
	int	 my_idx;
	int	 ii;

	hd = (MPT_SCSI_HOST *) SCpnt->device->host->hostdata;
	lun = SCpnt->device->lun;
	SCpnt->scsi_done = done;

	dmfprintk((MYIOC_s_INFO_FMT "qcmd: SCpnt=%p, done()=%p\n",
			(hd && hd->ioc) ? hd->ioc->name : "ioc?", SCpnt, done));

	if (hd->resetPending) {
		dtmprintk((MYIOC_s_WARN_FMT "qcmd: SCpnt=%p timeout + 60HZ\n",
			(hd && hd->ioc) ? hd->ioc->name : "ioc?", SCpnt));
		return SCSI_MLQUEUE_HOST_BUSY;
	}

	if ((hd->ioc->bus_type == SPI) &&
	    vdev->vtarget->tflags & MPT_TARGET_FLAGS_RAID_COMPONENT &&
	    mptscsih_raid_id_to_num(hd, SCpnt->device->id) < 0) {
		SCpnt->result = DID_NO_CONNECT << 16;
		done(SCpnt);
		return 0;
	}

	/*
	 *  Put together a MPT SCSI request...
	 */
	if ((mf = mpt_get_msg_frame(hd->ioc->DoneCtx, hd->ioc)) == NULL) {
		dprintk((MYIOC_s_WARN_FMT "QueueCmd, no msg frames!!\n",
				hd->ioc->name));
		return SCSI_MLQUEUE_HOST_BUSY;
	}

	pScsiReq = (SCSIIORequest_t *) mf;

	my_idx = le16_to_cpu(mf->u.frame.hwhdr.msgctxu.fld.req_idx);

	ADD_INDEX_LOG(my_idx);

	/*    TUR's being issued with scsictl=0x02000000 (DATA_IN)!
	 *    Seems we may receive a buffer (datalen>0) even when there
	 *    will be no data transfer!  GRRRRR...
	 */
	if (SCpnt->sc_data_direction == DMA_FROM_DEVICE) {
		datalen = SCpnt->request_bufflen;
		scsidir = MPI_SCSIIO_CONTROL_READ;	/* DATA IN  (host<--ioc<--dev) */
	} else if (SCpnt->sc_data_direction == DMA_TO_DEVICE) {
		datalen = SCpnt->request_bufflen;
		scsidir = MPI_SCSIIO_CONTROL_WRITE;	/* DATA OUT (host-->ioc-->dev) */
	} else {
		datalen = 0;
		scsidir = MPI_SCSIIO_CONTROL_NODATATRANSFER;
	}

	/* Default to untagged. Once a target structure has been allocated,
	 * use the Inquiry data to determine if device supports tagged.
	 */
	if (vdev
	    && (vdev->vtarget->tflags & MPT_TARGET_FLAGS_Q_YES)
	    && (SCpnt->device->tagged_supported)) {
		scsictl = scsidir | MPI_SCSIIO_CONTROL_SIMPLEQ;
	} else {
		scsictl = scsidir | MPI_SCSIIO_CONTROL_UNTAGGED;
	}

	/* Use the above information to set up the message frame
	 */
	pScsiReq->TargetID = (u8) vdev->vtarget->target_id;
	pScsiReq->Bus = vdev->vtarget->bus_id;
	pScsiReq->ChainOffset = 0;
	if (vdev->vtarget->tflags &  MPT_TARGET_FLAGS_RAID_COMPONENT)
		pScsiReq->Function = MPI_FUNCTION_RAID_SCSI_IO_PASSTHROUGH;
	else
		pScsiReq->Function = MPI_FUNCTION_SCSI_IO_REQUEST;
	pScsiReq->CDBLength = SCpnt->cmd_len;
	pScsiReq->SenseBufferLength = MPT_SENSE_BUFFER_SIZE;
	pScsiReq->Reserved = 0;
	pScsiReq->MsgFlags = mpt_msg_flags();
	pScsiReq->LUN[0] = 0;
	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;

	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.