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drm/ttm: isolate dma data from ttm_tt V4

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Move dma data to a superset ttm_dma_tt structure which herit
from ttm_tt. This allow driver that don't use dma functionalities
to not have to waste memory for it.

V2 Rebase on top of no memory account changes (where/when is my
   delorean when i need it ?)
V3 Make sure page list is initialized empty
V4 typo/syntax fixes

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
This commit is contained in:
Jerome Glisse
2011-11-09 17:15:26 -05:00
committed by Dave Airlie
parent 3230cfc34f
commit 8e7e70522d
9 changed files with 203 additions and 156 deletions
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60
drivers/gpu/drm/ttm/ttm_tt.c
View File

@@ -48,17 +48,14 @@
*/
static void ttm_tt_alloc_page_directory(struct ttm_tt *ttm)
{
ttm->pages = drm_calloc_large(ttm->num_pages, sizeof(*ttm->pages));
ttm->dma_address = drm_calloc_large(ttm->num_pages,
sizeof(*ttm->dma_address));
ttm->pages = drm_calloc_large(ttm->num_pages, sizeof(void*));
}
static void ttm_tt_free_page_directory(struct ttm_tt *ttm)
static void ttm_dma_tt_alloc_page_directory(struct ttm_dma_tt *ttm)
{
drm_free_large(ttm->pages);
ttm->pages = NULL;
drm_free_large(ttm->dma_address);
ttm->dma_address = NULL;
ttm->ttm.pages = drm_calloc_large(ttm->ttm.num_pages, sizeof(void*));
ttm->dma_address = drm_calloc_large(ttm->ttm.num_pages,
sizeof(*ttm->dma_address));
}
#ifdef CONFIG_X86
@@ -173,7 +170,6 @@ void ttm_tt_destroy(struct ttm_tt *ttm)
if (likely(ttm->pages != NULL)) {
ttm->bdev->driver->ttm_tt_unpopulate(ttm);
ttm_tt_free_page_directory(ttm);
}
if (!(ttm->page_flags & TTM_PAGE_FLAG_PERSISTENT_SWAP) &&
@@ -196,9 +192,8 @@ int ttm_tt_init(struct ttm_tt *ttm, struct ttm_bo_device *bdev,
ttm->dummy_read_page = dummy_read_page;
ttm->state = tt_unpopulated;
INIT_LIST_HEAD(&ttm->alloc_list);
ttm_tt_alloc_page_directory(ttm);
if (!ttm->pages || !ttm->dma_address) {
if (!ttm->pages) {
ttm_tt_destroy(ttm);
printk(KERN_ERR TTM_PFX "Failed allocating page table\n");
return -ENOMEM;
@@ -207,6 +202,49 @@ int ttm_tt_init(struct ttm_tt *ttm, struct ttm_bo_device *bdev,
}
EXPORT_SYMBOL(ttm_tt_init);
void ttm_tt_fini(struct ttm_tt *ttm)
{
drm_free_large(ttm->pages);
ttm->pages = NULL;
}
EXPORT_SYMBOL(ttm_tt_fini);
int ttm_dma_tt_init(struct ttm_dma_tt *ttm_dma, struct ttm_bo_device *bdev,
unsigned long size, uint32_t page_flags,
struct page *dummy_read_page)
{
struct ttm_tt *ttm = &ttm_dma->ttm;
ttm->bdev = bdev;
ttm->glob = bdev->glob;
ttm->num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
ttm->caching_state = tt_cached;
ttm->page_flags = page_flags;
ttm->dummy_read_page = dummy_read_page;
ttm->state = tt_unpopulated;
INIT_LIST_HEAD(&ttm_dma->pages_list);
ttm_dma_tt_alloc_page_directory(ttm_dma);
if (!ttm->pages || !ttm_dma->dma_address) {
ttm_tt_destroy(ttm);
printk(KERN_ERR TTM_PFX "Failed allocating page table\n");
return -ENOMEM;
}
return 0;
}
EXPORT_SYMBOL(ttm_dma_tt_init);
void ttm_dma_tt_fini(struct ttm_dma_tt *ttm_dma)
{
struct ttm_tt *ttm = &ttm_dma->ttm;
drm_free_large(ttm->pages);
ttm->pages = NULL;
drm_free_large(ttm_dma->dma_address);
ttm_dma->dma_address = NULL;
}
EXPORT_SYMBOL(ttm_dma_tt_fini);
void ttm_tt_unbind(struct ttm_tt *ttm)
{
int ret;