/* radeon_mem.c -- Simple GART/fb memory manager for radeon -*- linux-c -*-
*
* Copyright (C) The Weather Channel, Inc. 2002. All Rights Reserved.
- *
+ *
* The Weather Channel (TM) funded Tungsten Graphics to develop the
* initial release of the Radeon 8500 driver under the XFree86 license.
* This notice must be preserved.
#include "radeon_drv.h"
/* Very simple allocator for GART memory, working on a static range
- * already mapped into each client's address space.
+ * already mapped into each client's address space.
*/
static struct mem_block *split_block(struct mem_block *p, int start, int size,
- DRMFILE filp )
+ DRMFILE filp)
{
/* Maybe cut off the start of an existing block */
if (start > p->start) {
- struct mem_block *newblock = drm_alloc(sizeof(*newblock), DRM_MEM_BUFS );
- if (!newblock)
+ struct mem_block *newblock =
+ drm_alloc(sizeof(*newblock), DRM_MEM_BUFS);
+ if (!newblock)
goto out;
newblock->start = start;
newblock->size = p->size - (start - p->start);
p->size -= newblock->size;
p = newblock;
}
-
+
/* Maybe cut off the end of an existing block */
if (size < p->size) {
- struct mem_block *newblock = drm_alloc(sizeof(*newblock), DRM_MEM_BUFS );
+ struct mem_block *newblock =
+ drm_alloc(sizeof(*newblock), DRM_MEM_BUFS);
if (!newblock)
goto out;
newblock->start = start + size;
p->size = size;
}
- out:
+ out:
/* Our block is in the middle */
p->filp = filp;
return p;
}
-static struct mem_block *alloc_block( struct mem_block *heap, int size,
- int align2, DRMFILE filp )
+static struct mem_block *alloc_block(struct mem_block *heap, int size,
+ int align2, DRMFILE filp)
{
struct mem_block *p;
- int mask = (1 << align2)-1;
+ int mask = (1 << align2) - 1;
list_for_each(p, heap) {
int start = (p->start + mask) & ~mask;
if (p->filp == 0 && start + size <= p->start + p->size)
- return split_block( p, start, size, filp );
+ return split_block(p, start, size, filp);
}
return NULL;
}
-static struct mem_block *find_block( struct mem_block *heap, int start )
+static struct mem_block *find_block(struct mem_block *heap, int start)
{
struct mem_block *p;
list_for_each(p, heap)
- if (p->start == start)
- return p;
+ if (p->start == start)
+ return p;
return NULL;
}
-
-static void free_block( struct mem_block *p )
+static void free_block(struct mem_block *p)
{
p->filp = NULL;
p->size += q->size;
p->next = q->next;
p->next->prev = p;
- drm_free(q, sizeof(*q), DRM_MEM_BUFS );
+ drm_free(q, sizeof(*q), DRM_MEM_BUFS);
}
if (p->prev->filp == 0) {
q->size += p->size;
q->next = p->next;
q->next->prev = q;
- drm_free(p, sizeof(*q), DRM_MEM_BUFS );
+ drm_free(p, sizeof(*q), DRM_MEM_BUFS);
}
}
*/
static int init_heap(struct mem_block **heap, int start, int size)
{
- struct mem_block *blocks = drm_alloc(sizeof(*blocks), DRM_MEM_BUFS );
+ struct mem_block *blocks = drm_alloc(sizeof(*blocks), DRM_MEM_BUFS);
- if (!blocks)
+ if (!blocks)
return DRM_ERR(ENOMEM);
-
- *heap = drm_alloc(sizeof(**heap), DRM_MEM_BUFS );
+
+ *heap = drm_alloc(sizeof(**heap), DRM_MEM_BUFS);
if (!*heap) {
- drm_free( blocks, sizeof(*blocks), DRM_MEM_BUFS );
+ drm_free(blocks, sizeof(*blocks), DRM_MEM_BUFS);
return DRM_ERR(ENOMEM);
}
blocks->filp = NULL;
blocks->next = blocks->prev = *heap;
- memset( *heap, 0, sizeof(**heap) );
- (*heap)->filp = (DRMFILE) -1;
+ memset(*heap, 0, sizeof(**heap));
+ (*heap)->filp = (DRMFILE) - 1;
(*heap)->next = (*heap)->prev = blocks;
return 0;
}
-
/* Free all blocks associated with the releasing file.
*/
-void radeon_mem_release( DRMFILE filp, struct mem_block *heap )
+void radeon_mem_release(DRMFILE filp, struct mem_block *heap)
{
struct mem_block *p;
return;
list_for_each(p, heap) {
- if (p->filp == filp)
+ if (p->filp == filp)
p->filp = NULL;
}
p->size += q->size;
p->next = q->next;
p->next->prev = p;
- drm_free(q, sizeof(*q),DRM_MEM_DRIVER);
+ drm_free(q, sizeof(*q), DRM_MEM_DRIVER);
}
}
}
/* Shutdown.
*/
-void radeon_mem_takedown( struct mem_block **heap )
+void radeon_mem_takedown(struct mem_block **heap)
{
struct mem_block *p;
-
+
if (!*heap)
return;
- for (p = (*heap)->next ; p != *heap ; ) {
+ for (p = (*heap)->next; p != *heap;) {
struct mem_block *q = p;
p = p->next;
- drm_free(q, sizeof(*q),DRM_MEM_DRIVER);
+ drm_free(q, sizeof(*q), DRM_MEM_DRIVER);
}
- drm_free( *heap, sizeof(**heap),DRM_MEM_DRIVER );
+ drm_free(*heap, sizeof(**heap), DRM_MEM_DRIVER);
*heap = NULL;
}
-
-
/* IOCTL HANDLERS */
-static struct mem_block **get_heap( drm_radeon_private_t *dev_priv,
- int region )
+static struct mem_block **get_heap(drm_radeon_private_t * dev_priv, int region)
{
- switch( region ) {
+ switch (region) {
case RADEON_MEM_REGION_GART:
- return &dev_priv->gart_heap;
+ return &dev_priv->gart_heap;
case RADEON_MEM_REGION_FB:
return &dev_priv->fb_heap;
default:
}
}
-int radeon_mem_alloc( DRM_IOCTL_ARGS )
+int radeon_mem_alloc(DRM_IOCTL_ARGS)
{
DRM_DEVICE;
drm_radeon_private_t *dev_priv = dev->dev_private;
drm_radeon_mem_alloc_t alloc;
struct mem_block *block, **heap;
- if ( !dev_priv ) {
- DRM_ERROR( "%s called with no initialization\n", __FUNCTION__ );
+ if (!dev_priv) {
+ DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
return DRM_ERR(EINVAL);
}
- DRM_COPY_FROM_USER_IOCTL( alloc, (drm_radeon_mem_alloc_t __user *)data,
- sizeof(alloc) );
+ DRM_COPY_FROM_USER_IOCTL(alloc, (drm_radeon_mem_alloc_t __user *) data,
+ sizeof(alloc));
- heap = get_heap( dev_priv, alloc.region );
+ heap = get_heap(dev_priv, alloc.region);
if (!heap || !*heap)
return DRM_ERR(EFAULT);
-
+
/* Make things easier on ourselves: all allocations at least
* 4k aligned.
*/
if (alloc.alignment < 12)
alloc.alignment = 12;
- block = alloc_block( *heap, alloc.size, alloc.alignment,
- filp );
+ block = alloc_block(*heap, alloc.size, alloc.alignment, filp);
- if (!block)
+ if (!block)
return DRM_ERR(ENOMEM);
- if ( DRM_COPY_TO_USER( alloc.region_offset, &block->start,
- sizeof(int) ) ) {
- DRM_ERROR( "copy_to_user\n" );
+ if (DRM_COPY_TO_USER(alloc.region_offset, &block->start, sizeof(int))) {
+ DRM_ERROR("copy_to_user\n");
return DRM_ERR(EFAULT);
}
-
+
return 0;
}
-
-
-int radeon_mem_free( DRM_IOCTL_ARGS )
+int radeon_mem_free(DRM_IOCTL_ARGS)
{
DRM_DEVICE;
drm_radeon_private_t *dev_priv = dev->dev_private;
drm_radeon_mem_free_t memfree;
struct mem_block *block, **heap;
- if ( !dev_priv ) {
- DRM_ERROR( "%s called with no initialization\n", __FUNCTION__ );
+ if (!dev_priv) {
+ DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
return DRM_ERR(EINVAL);
}
- DRM_COPY_FROM_USER_IOCTL( memfree, (drm_radeon_mem_free_t __user *)data,
- sizeof(memfree) );
+ DRM_COPY_FROM_USER_IOCTL(memfree, (drm_radeon_mem_free_t __user *) data,
+ sizeof(memfree));
- heap = get_heap( dev_priv, memfree.region );
+ heap = get_heap(dev_priv, memfree.region);
if (!heap || !*heap)
return DRM_ERR(EFAULT);
-
- block = find_block( *heap, memfree.region_offset );
+
+ block = find_block(*heap, memfree.region_offset);
if (!block)
return DRM_ERR(EFAULT);
if (block->filp != filp)
return DRM_ERR(EPERM);
- free_block( block );
+ free_block(block);
return 0;
}
-int radeon_mem_init_heap( DRM_IOCTL_ARGS )
+int radeon_mem_init_heap(DRM_IOCTL_ARGS)
{
DRM_DEVICE;
drm_radeon_private_t *dev_priv = dev->dev_private;
drm_radeon_mem_init_heap_t initheap;
struct mem_block **heap;
- if ( !dev_priv ) {
- DRM_ERROR( "%s called with no initialization\n", __FUNCTION__ );
+ if (!dev_priv) {
+ DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
return DRM_ERR(EINVAL);
}
- DRM_COPY_FROM_USER_IOCTL( initheap, (drm_radeon_mem_init_heap_t __user *)data,
- sizeof(initheap) );
+ DRM_COPY_FROM_USER_IOCTL(initheap,
+ (drm_radeon_mem_init_heap_t __user *) data,
+ sizeof(initheap));
- heap = get_heap( dev_priv, initheap.region );
- if (!heap)
+ heap = get_heap(dev_priv, initheap.region);
+ if (!heap)
return DRM_ERR(EFAULT);
-
+
if (*heap) {
DRM_ERROR("heap already initialized?");
return DRM_ERR(EFAULT);
}
-
- return init_heap( heap, initheap.start, initheap.size );
-}
-
+ return init_heap(heap, initheap.start, initheap.size);
+}
git://git.onelab.eu / linux-2.6.git / blobdiff