mptctl.c

这个linux源代码是很全面的~基本完整了~使用c编译的~由于时间问题我没有亲自测试~但就算用来做参考资料也是非常好的

	if (copy_from_user(&karg, uarg, sizeof(struct mpt_ioctl_targetinfo))) {
		printk(KERN_ERR "%s@%d::mptctl_gettargetinfo - "
			"Unable to read in mpt_ioctl_targetinfo struct @ %p\n",
				__FILE__, __LINE__, (void*)uarg);
		return -EFAULT;
	}

	if (((iocnum = mpt_verify_adapter(karg.hdr.iocnum, &ioc)) < 0) ||
	    (ioc == NULL)) {
		dctlprintk((KERN_ERR "%s::mptctl_gettargetinfo() @%d - ioc%d not found!\n",
				__FILE__, __LINE__, iocnum));
		return -ENODEV;
	}

	/* Get the port number and set the maximum number of bytes
	 * in the returned structure.
	 * Ignore the port setting.
	 */
	numBytes = karg.hdr.maxDataSize - sizeof(mpt_ioctl_header);
	maxWordsLeft = numBytes/sizeof(int);
	port = karg.hdr.port;

	if (maxWordsLeft <= 0) {
		printk(KERN_ERR "%s::mptctl_gettargetinfo() @%d - no memory available!\n",
				__FILE__, __LINE__);
		return -ENOMEM;
	}

	/* Fill in the data and return the structure to the calling
	 * program
	 */

	/* struct mpt_ioctl_targetinfo does not contain sufficient space
	 * for the target structures so when the IOCTL is called, there is
	 * not sufficient stack space for the structure. Allocate memory,
	 * populate the memory, copy back to the user, then free memory.
	 * targetInfo format:
	 * bits 31-24: reserved
	 *      23-16: LUN
	 *      15- 8: Bus Number
	 *       7- 0: Target ID
	 */
	pmem = kmalloc(numBytes, GFP_KERNEL);
	if (pmem == NULL) {
		printk(KERN_ERR "%s::mptctl_gettargetinfo() @%d - no memory available!\n",
				__FILE__, __LINE__);
		return -ENOMEM;
	}
	memset(pmem, 0, numBytes);
	pdata =  (int *) pmem;

	/* Get number of devices
         */
	if ( (sh = ioc->sh) != NULL) {

		max_id = sh->max_id - 1;
		hd = (MPT_SCSI_HOST *) sh->hostdata;

		/* Check all of the target structures.
		 * Save the Id and increment the counter,
		 * if ptr non-null.
		 * sh->max_id = maximum target ID + 1
		 */
		if (hd && hd->Targets) {
			ii = 0;
			while (ii <= max_id) {
				if (hd->Targets[ii]) {
					for (jj = 0; jj <= MPT_LAST_LUN; jj++) {
						lun = (1 << jj);
						if (hd->Targets[ii]->luns & lun) {
							numDevices++;
							*pdata = (jj << 16) | ii;
							--maxWordsLeft;

							pdata++;

							if (maxWordsLeft <= 0) {
								break;
							}
						}
					}
				}
				ii++;
			}
		}
	}
	karg.numDevices = numDevices;

	/* Copy part of the data from kernel memory to user memory
	 */
	if (copy_to_user((char *)arg, &karg,
				sizeof(struct mpt_ioctl_targetinfo))) {
		printk(KERN_ERR "%s@%d::mptctl_gettargetinfo - "
			"Unable to write out mpt_ioctl_targetinfo struct @ %p\n",
				__FILE__, __LINE__, (void*)uarg);
		kfree(pmem);
		return -EFAULT;
	}

	/* Copy the remaining data from kernel memory to user memory
	 */
	if (copy_to_user((char *) uarg->targetInfo, pmem, numBytes)) {
		printk(KERN_ERR "%s@%d::mptctl_gettargetinfo - "
			"Unable to write out mpt_ioctl_targetinfo struct @ %p\n",
				__FILE__, __LINE__, (void*)pdata);
		kfree(pmem);
		return -EFAULT;
	}

	kfree(pmem);

	return 0;
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/* MPT IOCTL Test function.
 *
 * Outputs:	None.
 * Return:	0 if successful
 *		-EFAULT if data unavailable
 *		-ENODEV  if no such device/adapter
 */
static int
mptctl_readtest (unsigned long arg)
{
	struct mpt_ioctl_test	*uarg = (struct mpt_ioctl_test *) arg;
	struct mpt_ioctl_test	 karg;
	MPT_ADAPTER *ioc;
	int iocnum;

	dctlprintk(("mptctl_readtest called.\n"));
	if (copy_from_user(&karg, uarg, sizeof(struct mpt_ioctl_test))) {
		printk(KERN_ERR "%s@%d::mptctl_readtest - "
			"Unable to read in mpt_ioctl_test struct @ %p\n",
				__FILE__, __LINE__, (void*)uarg);
		return -EFAULT;
	}

	if (((iocnum = mpt_verify_adapter(karg.hdr.iocnum, &ioc)) < 0) ||
	    (ioc == NULL)) {
		dctlprintk((KERN_ERR "%s::mptctl_readtest() @%d - ioc%d not found!\n",
				__FILE__, __LINE__, iocnum));
		return -ENODEV;
	}

	/* Fill in the data and return the structure to the calling
	 * program
	 */

#ifdef MFCNT
	karg.chip_type = ioc->mfcnt;
#else
	karg.chip_type = ioc->chip_type;
#endif
	strncpy (karg.name, ioc->name, MPT_MAX_NAME);
	strncpy (karg.product, ioc->prod_name, MPT_PRODUCT_LENGTH);

	/* Copy the data from kernel memory to user memory
	 */
	if (copy_to_user((char *)arg, &karg, sizeof(struct mpt_ioctl_test))) {
		printk(KERN_ERR "%s@%d::mptctl_readtest - "
			"Unable to write out mpt_ioctl_test struct @ %p\n",
				__FILE__, __LINE__, (void*)uarg);
		return -EFAULT;
	}

	return 0;
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/*
 *	mptctl_eventquery - Query the host adapter for the event types
 *	that are being logged.
 *	@arg: User space argument
 *
 * Outputs:	None.
 * Return:	0 if successful
 *		-EFAULT if data unavailable
 *		-ENODEV  if no such device/adapter
 */
static int
mptctl_eventquery (unsigned long arg)
{
	struct mpt_ioctl_eventquery	*uarg = (struct mpt_ioctl_eventquery *) arg;
	struct mpt_ioctl_eventquery	 karg;
	MPT_ADAPTER *ioc;
	int iocnum;

	dctlprintk(("mptctl_eventquery called.\n"));
	if (copy_from_user(&karg, uarg, sizeof(struct mpt_ioctl_eventquery))) {
		printk(KERN_ERR "%s@%d::mptctl_eventquery - "
			"Unable to read in mpt_ioctl_eventquery struct @ %p\n",
				__FILE__, __LINE__, (void*)uarg);
		return -EFAULT;
	}

	if (((iocnum = mpt_verify_adapter(karg.hdr.iocnum, &ioc)) < 0) ||
	    (ioc == NULL)) {
		dctlprintk((KERN_ERR "%s::mptctl_eventquery() @%d - ioc%d not found!\n",
				__FILE__, __LINE__, iocnum));
		return -ENODEV;
	}

	karg.eventEntries = ioc->eventLogSize;
	karg.eventTypes = ioc->eventTypes;

	/* Copy the data from kernel memory to user memory
	 */
	if (copy_to_user((char *)arg, &karg, sizeof(struct mpt_ioctl_eventquery))) {
		printk(KERN_ERR "%s@%d::mptctl_eventquery - "
			"Unable to write out mpt_ioctl_eventquery struct @ %p\n",
				__FILE__, __LINE__, (void*)uarg);
		return -EFAULT;
	}
	return 0;
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
static int
mptctl_eventenable (unsigned long arg)
{
	struct mpt_ioctl_eventenable	*uarg = (struct mpt_ioctl_eventenable *) arg;
	struct mpt_ioctl_eventenable	 karg;
	MPT_ADAPTER *ioc;
	int iocnum;

	dctlprintk(("mptctl_eventenable called.\n"));
	if (copy_from_user(&karg, uarg, sizeof(struct mpt_ioctl_eventenable))) {
		printk(KERN_ERR "%s@%d::mptctl_eventenable - "
			"Unable to read in mpt_ioctl_eventenable struct @ %p\n",
				__FILE__, __LINE__, (void*)uarg);
		return -EFAULT;
	}

	if (((iocnum = mpt_verify_adapter(karg.hdr.iocnum, &ioc)) < 0) ||
	    (ioc == NULL)) {
		dctlprintk((KERN_ERR "%s::mptctl_eventenable() @%d - ioc%d not found!\n",
				__FILE__, __LINE__, iocnum));
		return -ENODEV;
	}

	if (ioc->events == NULL) {
		/* Have not yet allocated memory - do so now.
		 */
		int sz = MPTCTL_EVENT_LOG_SIZE * sizeof(MPT_IOCTL_EVENTS);
		ioc->events = kmalloc(sz, GFP_KERNEL);
		if (ioc->events == NULL) {
			printk(KERN_ERR MYNAM ": ERROR - Insufficient memory to add adapter!\n");
			return -ENOMEM;
		}
		memset(ioc->events, 0, sz);
		ioc->alloc_total += sz;

		ioc->eventLogSize = MPTCTL_EVENT_LOG_SIZE;
		ioc->eventContext = 0;
        }

	/* Update the IOC event logging flag.
	 */
	ioc->eventTypes = karg.eventTypes;

	return 0;
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
static int
mptctl_eventreport (unsigned long arg)
{
	struct mpt_ioctl_eventreport	*uarg = (struct mpt_ioctl_eventreport *) arg;
	struct mpt_ioctl_eventreport	 karg;
	MPT_ADAPTER		 *ioc;
	int			 iocnum;
	int			 numBytes, maxEvents, max;

	dctlprintk(("mptctl_eventreport called.\n"));
	if (copy_from_user(&karg, uarg, sizeof(struct mpt_ioctl_eventreport))) {
		printk(KERN_ERR "%s@%d::mptctl_eventreport - "
			"Unable to read in mpt_ioctl_eventreport struct @ %p\n",
				__FILE__, __LINE__, (void*)uarg);
		return -EFAULT;
	}

	if (((iocnum = mpt_verify_adapter(karg.hdr.iocnum, &ioc)) < 0) ||
	    (ioc == NULL)) {
		dctlprintk((KERN_ERR "%s::mptctl_eventreport() @%d - ioc%d not found!\n",
				__FILE__, __LINE__, iocnum));
		return -ENODEV;
	}

	numBytes = karg.hdr.maxDataSize - sizeof(mpt_ioctl_header);
	maxEvents = numBytes/sizeof(MPT_IOCTL_EVENTS);


	max = ioc->eventLogSize < maxEvents ? ioc->eventLogSize : maxEvents;

	/* If fewer than 1 event is requested, there must have
	 * been some type of error.
	 */
	if ((max < 1) || !ioc->events)
		return -ENODATA;

	/* Copy the data from kernel memory to user memory
	 */
	numBytes = max * sizeof(MPT_IOCTL_EVENTS);
	if (copy_to_user((char *) uarg->eventData, ioc->events, numBytes)) {
		printk(KERN_ERR "%s@%d::mptctl_eventreport - "
			"Unable to write out mpt_ioctl_eventreport struct @ %p\n",
				__FILE__, __LINE__, (void*)ioc->events);
		return -EFAULT;
	}

	return 0;
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
static int
mptctl_replace_fw (unsigned long arg)
{
	struct mpt_ioctl_replace_fw	*uarg = (struct mpt_ioctl_replace_fw *) arg;
	struct mpt_ioctl_replace_fw	 karg;
	MPT_ADAPTER		 *ioc;
	fw_image_t		 **fwmem = NULL;
	int			 iocnum;
	int			 newFwSize;
	int			 num_frags, alloc_sz;
	int			 ii;
	u32			 offset;

	dctlprintk(("mptctl_replace_fw called.\n"));
	if (copy_from_user(&karg, uarg, sizeof(struct mpt_ioctl_replace_fw))) {
		printk(KERN_ERR "%s@%d::mptctl_replace_fw - "
			"Unable to read in mpt_ioctl_replace_fw struct @ %p\n",
				__FILE__, __LINE__, (void*)uarg);
		return -EFAULT;
	}

	if (((iocnum = mpt_verify_adapter(karg.hdr.iocnum, &ioc)) < 0) ||
	    (ioc == NULL)) {
		dctlprintk((KERN_ERR "%s::mptctl_replace_fw() @%d - ioc%d not found!\n",
				__FILE__, __LINE__, iocnum));
		return -ENODEV;
	}

	/* If not caching FW, return 0
	 */
	if ((ioc->cached_fw == NULL) && (ioc->alt_ioc) && (ioc->alt_ioc->cached_fw == NULL))
		return 0;

	/* Allocate memory for the new FW image
	 */
	newFwSize = karg.newImageSize;
	fwmem = mpt_alloc_fw_memory(ioc, newFwSize, &num_frags, &alloc_sz); 
	if (fwmem == NULL)
		return -ENOMEM;

	offset = 0;
	for (ii = 0; ii < num_frags; ii++) {
		/* Copy the data from user memory to kernel space
		 */
		if (copy_from_user(fwmem[ii]->fw, uarg->newImage + offset, fwmem[ii]->size)) {
			printk(KERN_ERR "%s@%d::mptctl_replace_fw - "
				"Unable to read in mpt_ioctl_replace_fw image @ %p\n",
					__FILE__, __LINE__, (void*)uarg);

			mpt_free_fw_memory(ioc, fwmem);
			return -EFAULT;
		}
		offset += fwmem[ii]->size;
	}


	/* Free the old FW image 
	 */
	if (ioc->cached_fw) {
		mpt_free_fw_memory(ioc, 0);
		ioc->cached_fw = fwmem;
		ioc->alloc_total += alloc_sz;
	} else if ((ioc->alt_ioc) && (ioc->alt_ioc->cached_fw)) {
		mpt_free_fw_memory(ioc->alt_ioc, 0);
		ioc->alt_ioc->cached_fw = fwmem;
		ioc->alt_ioc->alloc_total += alloc_sz;
	}

	/* Update IOCFactsReply
	 */
	ioc->facts.FWImageSize = newFwSize;
	if (ioc->alt_ioc)
		ioc->alt_ioc->facts.FWImageSize = newFwSize;

	return 0;
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/* MPT IOCTL MPTCOMMAND function.
 * Cast the arg into the mpt_ioctl_mpt_command structure.
 *
 * Outputs:	None.
 * Return:	0 if successful
 *		-EBUSY  if previous command timout and IOC reset is not complete.
 *		-EFAULT if data unavailable
 *		-ENODEV if no such device/adapter
 *		-ETIME	if timer expires
 *		-ENOMEM if memory allocation error
 */
static int
mptctl_mpt_command (unsigned long arg)
{
	struct mpt_ioctl_command *uarg = (struct mpt_ioctl_command *) arg;
	struct mpt_ioctl_command  karg;
	MPT_ADAPTER	*ioc;
	int		iocnum;
	int		rc;

	dctlprintk(("mptctl_command called.\n"));

	if (copy_from_user(&karg, uarg, sizeof(struct mpt_ioctl_command))) {
		printk(KERN_ERR "%s@%d::mptctl_mpt_command - "
			"Unable to read in mpt_ioctl_command struct @ %p\n",
				__FILE__, __LINE__, (void*)uarg);
		return -EFAULT;
	}

	if (((iocnum = mpt_verify_adapter(karg.hdr.iocnum, &ioc)) < 0) ||
	    (ioc == NULL)) {
		dctlprintk((KERN_ERR "%s::mptctl_mpt_command() @%d - ioc%d not found!\n",
				__FILE__, __LINE__, iocnum));
		return -ENODEV;
	}

	rc = mptctl_do_mpt_command (karg, (char *) &uarg->MF, 0);

	return rc;
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/* Worker routine for the IOCTL MPTCOMMAND and MPTCOMMAND32 (sparc) commands.
 *
 * Outputs:	None.
 * Return:	0 if successful
 *		-EBUSY  if previous command timout and IOC reset is not complete.
 *		-EFAULT if data unavailable
 *		-ENODEV if no such device/adapter
 *		-ETIME	if timer expires
 *		-ENOMEM if memory allocation error
 *		-EPERM if SCSI I/O and target is untagged
 */
static int
mptctl_do_mpt_command (struct mpt_ioctl_command karg, char *mfPtr, int local)
{
	MPT_ADAPTER	*ioc;
	MPT_FRAME_HDR	*mf = NULL;
	MPIHeader_t	*hdr;
	char		*psge;
	MptSge_t	*this_sge = NULL;
	MptSge_t	*sglbuf = NULL;
	struct buflist	bufIn;	/* data In buffer */
	struct buflist	bufOut; /* data Out buffer */
	dma_addr_t	sglbuf_dma;
	dma_addr_t	dma_addr;
	int		dir;	/* PCI data direction */