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path: root/drivers/char/drm/drm_scatter.c
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Diffstat (limited to 'drivers/char/drm/drm_scatter.c')
-rw-r--r--drivers/char/drm/drm_scatter.c183
1 files changed, 87 insertions, 96 deletions
diff --git a/drivers/char/drm/drm_scatter.c b/drivers/char/drm/drm_scatter.c
index ed267d49bc6..ce81bf24820 100644
--- a/drivers/char/drm/drm_scatter.c
+++ b/drivers/char/drm/drm_scatter.c
@@ -1,5 +1,5 @@
/**
- * \file drm_scatter.h
+ * \file drm_scatter.c
* IOCTLs to manage scatter/gather memory
*
* \author Gareth Hughes <gareth@valinux.com>
@@ -37,28 +37,24 @@
#define DEBUG_SCATTER 0
-void drm_sg_cleanup( drm_sg_mem_t *entry )
+void drm_sg_cleanup(drm_sg_mem_t * entry)
{
struct page *page;
int i;
- for ( i = 0 ; i < entry->pages ; i++ ) {
+ for (i = 0; i < entry->pages; i++) {
page = entry->pagelist[i];
- if ( page )
- ClearPageReserved( page );
+ if (page)
+ ClearPageReserved(page);
}
- vfree( entry->virtual );
-
- drm_free( entry->busaddr,
- entry->pages * sizeof(*entry->busaddr),
- DRM_MEM_PAGES );
- drm_free( entry->pagelist,
- entry->pages * sizeof(*entry->pagelist),
- DRM_MEM_PAGES );
- drm_free( entry,
- sizeof(*entry),
- DRM_MEM_SGLISTS );
+ vfree(entry->virtual);
+
+ drm_free(entry->busaddr,
+ entry->pages * sizeof(*entry->busaddr), DRM_MEM_PAGES);
+ drm_free(entry->pagelist,
+ entry->pages * sizeof(*entry->pagelist), DRM_MEM_PAGES);
+ drm_free(entry, sizeof(*entry), DRM_MEM_SGLISTS);
}
#ifdef _LP64
@@ -67,8 +63,8 @@ void drm_sg_cleanup( drm_sg_mem_t *entry )
# define ScatterHandle(x) (unsigned int)(x)
#endif
-int drm_sg_alloc( struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg )
+int drm_sg_alloc(struct inode *inode, struct file *filp,
+ unsigned int cmd, unsigned long arg)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->head->dev;
@@ -77,75 +73,70 @@ int drm_sg_alloc( struct inode *inode, struct file *filp,
drm_sg_mem_t *entry;
unsigned long pages, i, j;
- DRM_DEBUG( "%s\n", __FUNCTION__ );
+ DRM_DEBUG("%s\n", __FUNCTION__);
if (!drm_core_check_feature(dev, DRIVER_SG))
return -EINVAL;
- if ( dev->sg )
+ if (dev->sg)
return -EINVAL;
- if ( copy_from_user( &request, argp, sizeof(request) ) )
+ if (copy_from_user(&request, argp, sizeof(request)))
return -EFAULT;
- entry = drm_alloc( sizeof(*entry), DRM_MEM_SGLISTS );
- if ( !entry )
+ entry = drm_alloc(sizeof(*entry), DRM_MEM_SGLISTS);
+ if (!entry)
return -ENOMEM;
- memset( entry, 0, sizeof(*entry) );
+ memset(entry, 0, sizeof(*entry));
pages = (request.size + PAGE_SIZE - 1) / PAGE_SIZE;
- DRM_DEBUG( "sg size=%ld pages=%ld\n", request.size, pages );
+ DRM_DEBUG("sg size=%ld pages=%ld\n", request.size, pages);
entry->pages = pages;
- entry->pagelist = drm_alloc( pages * sizeof(*entry->pagelist),
- DRM_MEM_PAGES );
- if ( !entry->pagelist ) {
- drm_free( entry, sizeof(*entry), DRM_MEM_SGLISTS );
+ entry->pagelist = drm_alloc(pages * sizeof(*entry->pagelist),
+ DRM_MEM_PAGES);
+ if (!entry->pagelist) {
+ drm_free(entry, sizeof(*entry), DRM_MEM_SGLISTS);
return -ENOMEM;
}
memset(entry->pagelist, 0, pages * sizeof(*entry->pagelist));
- entry->busaddr = drm_alloc( pages * sizeof(*entry->busaddr),
- DRM_MEM_PAGES );
- if ( !entry->busaddr ) {
- drm_free( entry->pagelist,
- entry->pages * sizeof(*entry->pagelist),
- DRM_MEM_PAGES );
- drm_free( entry,
- sizeof(*entry),
- DRM_MEM_SGLISTS );
+ entry->busaddr = drm_alloc(pages * sizeof(*entry->busaddr),
+ DRM_MEM_PAGES);
+ if (!entry->busaddr) {
+ drm_free(entry->pagelist,
+ entry->pages * sizeof(*entry->pagelist),
+ DRM_MEM_PAGES);
+ drm_free(entry, sizeof(*entry), DRM_MEM_SGLISTS);
return -ENOMEM;
}
- memset( (void *)entry->busaddr, 0, pages * sizeof(*entry->busaddr) );
-
- entry->virtual = vmalloc_32( pages << PAGE_SHIFT );
- if ( !entry->virtual ) {
- drm_free( entry->busaddr,
- entry->pages * sizeof(*entry->busaddr),
- DRM_MEM_PAGES );
- drm_free( entry->pagelist,
- entry->pages * sizeof(*entry->pagelist),
- DRM_MEM_PAGES );
- drm_free( entry,
- sizeof(*entry),
- DRM_MEM_SGLISTS );
+ memset((void *)entry->busaddr, 0, pages * sizeof(*entry->busaddr));
+
+ entry->virtual = vmalloc_32(pages << PAGE_SHIFT);
+ if (!entry->virtual) {
+ drm_free(entry->busaddr,
+ entry->pages * sizeof(*entry->busaddr), DRM_MEM_PAGES);
+ drm_free(entry->pagelist,
+ entry->pages * sizeof(*entry->pagelist),
+ DRM_MEM_PAGES);
+ drm_free(entry, sizeof(*entry), DRM_MEM_SGLISTS);
return -ENOMEM;
}
/* This also forces the mapping of COW pages, so our page list
* will be valid. Please don't remove it...
*/
- memset( entry->virtual, 0, pages << PAGE_SHIFT );
+ memset(entry->virtual, 0, pages << PAGE_SHIFT);
entry->handle = ScatterHandle((unsigned long)entry->virtual);
- DRM_DEBUG( "sg alloc handle = %08lx\n", entry->handle );
- DRM_DEBUG( "sg alloc virtual = %p\n", entry->virtual );
+ DRM_DEBUG("sg alloc handle = %08lx\n", entry->handle);
+ DRM_DEBUG("sg alloc virtual = %p\n", entry->virtual);
- for (i = (unsigned long)entry->virtual, j = 0; j < pages;
- i += PAGE_SIZE, j++) {
+ for (i = (unsigned long)entry->virtual, j = 0; j < pages;
+ i += PAGE_SIZE, j++) {
entry->pagelist[j] = vmalloc_to_page((void *)i);
if (!entry->pagelist[j])
goto failed;
@@ -154,8 +145,8 @@ int drm_sg_alloc( struct inode *inode, struct file *filp,
request.handle = entry->handle;
- if ( copy_to_user( argp, &request, sizeof(request) ) ) {
- drm_sg_cleanup( entry );
+ if (copy_to_user(argp, &request, sizeof(request))) {
+ drm_sg_cleanup(entry);
return -EFAULT;
}
@@ -166,50 +157,50 @@ int drm_sg_alloc( struct inode *inode, struct file *filp,
* versa.
*/
{
- int error = 0;
+ int error = 0;
- for ( i = 0 ; i < pages ; i++ ) {
- unsigned long *tmp;
+ for (i = 0; i < pages; i++) {
+ unsigned long *tmp;
- tmp = page_address( entry->pagelist[i] );
- for ( j = 0 ;
- j < PAGE_SIZE / sizeof(unsigned long) ;
- j++, tmp++ ) {
- *tmp = 0xcafebabe;
- }
- tmp = (unsigned long *)((u8 *)entry->virtual +
- (PAGE_SIZE * i));
- for( j = 0 ;
- j < PAGE_SIZE / sizeof(unsigned long) ;
- j++, tmp++ ) {
- if ( *tmp != 0xcafebabe && error == 0 ) {
- error = 1;
- DRM_ERROR( "Scatter allocation error, "
- "pagelist does not match "
- "virtual mapping\n" );
+ tmp = page_address(entry->pagelist[i]);
+ for (j = 0;
+ j < PAGE_SIZE / sizeof(unsigned long);
+ j++, tmp++) {
+ *tmp = 0xcafebabe;
+ }
+ tmp = (unsigned long *)((u8 *) entry->virtual +
+ (PAGE_SIZE * i));
+ for (j = 0;
+ j < PAGE_SIZE / sizeof(unsigned long);
+ j++, tmp++) {
+ if (*tmp != 0xcafebabe && error == 0) {
+ error = 1;
+ DRM_ERROR("Scatter allocation error, "
+ "pagelist does not match "
+ "virtual mapping\n");
+ }
+ }
+ tmp = page_address(entry->pagelist[i]);
+ for (j = 0;
+ j < PAGE_SIZE / sizeof(unsigned long);
+ j++, tmp++) {
+ *tmp = 0;
}
}
- tmp = page_address( entry->pagelist[i] );
- for(j = 0 ;
- j < PAGE_SIZE / sizeof(unsigned long) ;
- j++, tmp++) {
- *tmp = 0;
- }
- }
- if (error == 0)
- DRM_ERROR( "Scatter allocation matches pagelist\n" );
+ if (error == 0)
+ DRM_ERROR("Scatter allocation matches pagelist\n");
}
#endif
return 0;
- failed:
- drm_sg_cleanup( entry );
+ failed:
+ drm_sg_cleanup(entry);
return -ENOMEM;
}
-int drm_sg_free( struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg )
+int drm_sg_free(struct inode *inode, struct file *filp,
+ unsigned int cmd, unsigned long arg)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->head->dev;
@@ -219,20 +210,20 @@ int drm_sg_free( struct inode *inode, struct file *filp,
if (!drm_core_check_feature(dev, DRIVER_SG))
return -EINVAL;
- if ( copy_from_user( &request,
- (drm_scatter_gather_t __user *)arg,
- sizeof(request) ) )
+ if (copy_from_user(&request,
+ (drm_scatter_gather_t __user *) arg,
+ sizeof(request)))
return -EFAULT;
entry = dev->sg;
dev->sg = NULL;
- if ( !entry || entry->handle != request.handle )
+ if (!entry || entry->handle != request.handle)
return -EINVAL;
- DRM_DEBUG( "sg free virtual = %p\n", entry->virtual );
+ DRM_DEBUG("sg free virtual = %p\n", entry->virtual);
- drm_sg_cleanup( entry );
+ drm_sg_cleanup(entry);
return 0;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-28 21:58:17 +0000