staging/vme_user/vme_user.c

117 	unsigned int minor;
121 static ssize_t resource_to_user(int minor, char __user *buf, size_t count,
126 	if (count > image[minor].size_buf)
127 		count = image[minor].size_buf;
129 	copied = vme_master_read(image[minor].resource, image[minor].kern_buf,
134 	if (copy_to_user(buf, image[minor].kern_buf, (unsigned long)copied))
140 static ssize_t resource_from_user(unsigned int minor, const char __user *buf,
143 	if (count > image[minor].size_buf)
144 		count = image[minor].size_buf;
146 	if (copy_from_user(image[minor].kern_buf, buf, (unsigned long)count))
149 	return vme_master_write(image[minor].resource, image[minor].kern_buf,
153 static ssize_t buffer_to_user(unsigned int minor, char __user *buf,
158 	image_ptr = image[minor].kern_buf + *ppos;
165 static ssize_t buffer_from_user(unsigned int minor, const char __user *buf,
170 	image_ptr = image[minor].kern_buf + *ppos;
180 	unsigned int minor = iminor(file_inode(file));
184 	if (minor == CONTROL_MINOR)
187 	mutex_lock(&image[minor].mutex);
190 	image_size = vme_get_size(image[minor].resource);
194 		mutex_unlock(&image[minor].mutex);
202 	switch (type[minor]) {
204 		retval = resource_to_user(minor, buf, count, ppos);
207 		retval = buffer_to_user(minor, buf, count, ppos);
213 	mutex_unlock(&image[minor].mutex);
223 	unsigned int minor = iminor(file_inode(file));
227 	if (minor == CONTROL_MINOR)
230 	mutex_lock(&image[minor].mutex);
232 	image_size = vme_get_size(image[minor].resource);
236 		mutex_unlock(&image[minor].mutex);
244 	switch (type[minor]) {
246 		retval = resource_from_user(minor, buf, count, ppos);
249 		retval = buffer_from_user(minor, buf, count, ppos);
255 	mutex_unlock(&image[minor].mutex);
265 	unsigned int minor = iminor(file_inode(file));
269 	switch (type[minor]) {
272 		mutex_lock(&image[minor].mutex);
273 		image_size = vme_get_size(image[minor].resource);
275 		mutex_unlock(&image[minor].mutex);
299 	unsigned int minor = iminor(inode);
304 	switch (type[minor]) {
328 			retval = vme_master_get(image[minor].resource,
345 			if (image[minor].mmap_count != 0) {
359 			return vme_master_set(image[minor].resource,
374 			retval = vme_slave_get(image[minor].resource,
399 			return vme_slave_set(image[minor].resource,
401 				image[minor].pci_buf, slave.aspace,
417 	unsigned int minor = iminor(inode);
419 	mutex_lock(&image[minor].mutex);
421 	mutex_unlock(&image[minor].mutex);
436 	unsigned int minor = vma_priv->minor;
441 	mutex_lock(&image[minor].mutex);
442 	image[minor].mmap_count--;
443 	mutex_unlock(&image[minor].mutex);
453 static int vme_user_master_mmap(unsigned int minor, struct vm_area_struct *vma)
458 	mutex_lock(&image[minor].mutex);
460 	err = vme_master_mmap(image[minor].resource, vma);
462 		mutex_unlock(&image[minor].mutex);
468 		mutex_unlock(&image[minor].mutex);
472 	vma_priv->minor = minor;
477 	image[minor].mmap_count++;
479 	mutex_unlock(&image[minor].mutex);
486 	unsigned int minor = iminor(file_inode(file));
488 	if (type[minor] == MASTER_MINOR)
489 		return vme_user_master_mmap(minor, vma);
544 	/* Assign major and minor numbers for the driver */
718 	/* Unregister the major and minor device numbers */