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ttm: Introduce a placeholder for DMA (bus) addresses. 

This is right now limited to only non-pool constructs.

[v2: Fixed indentation issues, add review-by tag]

Reviewed-by: Thomas Hellstrom <thomas@shipmail.org>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Tested-by: Ian Campbell <ian.campbell@citrix.com>
This commit is contained in:
Konrad Rzeszutek Wilk 2010-11-29 13:52:18 -05:00
parent e53beacd23
commit f9820a46dd
4 changed files with 21 additions and 7 deletions
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8
drivers/gpu/drm/ttm/ttm_page_alloc.c
View File

@ -38,6 +38,7 @@
#include <linux/mm.h>
#include <linux/seq_file.h> /* for seq_printf */
#include <linux/slab.h>
#include <linux/dma-mapping.h>
#include <asm/atomic.h>
@ -662,7 +663,8 @@ out:
* cached pages.
*/
int ttm_get_pages(struct list_head *pages, int flags,
enum ttm_caching_state cstate, unsigned count)
enum ttm_caching_state cstate, unsigned count,
dma_addr_t *dma_address)
{
struct ttm_page_pool *pool = ttm_get_pool(flags, cstate);
struct page *p = NULL;
@ -720,7 +722,7 @@ int ttm_get_pages(struct list_head *pages, int flags,
printk(KERN_ERR TTM_PFX
"Failed to allocate extra pages "
"for large request.");
ttm_put_pages(pages, 0, flags, cstate);
ttm_put_pages(pages, 0, flags, cstate, NULL);
return r;
}
}
@ -731,7 +733,7 @@ int ttm_get_pages(struct list_head *pages, int flags,
/* Put all pages in pages list to correct pool to wait for reuse */
void ttm_put_pages(struct list_head *pages, unsigned page_count, int flags,
enum ttm_caching_state cstate)
enum ttm_caching_state cstate, dma_addr_t *dma_address)
{
unsigned long irq_flags;
struct ttm_page_pool *pool = ttm_get_pool(flags, cstate);

10
drivers/gpu/drm/ttm/ttm_tt.c
View File

@ -49,12 +49,16 @@ static int ttm_tt_swapin(struct ttm_tt *ttm);
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));
}
static void ttm_tt_free_page_directory(struct ttm_tt *ttm)
{
drm_free_large(ttm->pages);
ttm->pages = NULL;
drm_free_large(ttm->dma_address);
ttm->dma_address = NULL;
}
static void ttm_tt_free_user_pages(struct ttm_tt *ttm)
@ -105,7 +109,8 @@ static struct page *__ttm_tt_get_page(struct ttm_tt *ttm, int index)
INIT_LIST_HEAD(&h);
ret = ttm_get_pages(&h, ttm->page_flags, ttm->caching_state, 1);
ret = ttm_get_pages(&h, ttm->page_flags, ttm->caching_state, 1,
&ttm->dma_address[index]);
if (ret != 0)
return NULL;
@ -298,7 +303,8 @@ static void ttm_tt_free_alloced_pages(struct ttm_tt *ttm)
count++;
}
}
ttm_put_pages(&h, count, ttm->page_flags, ttm->caching_state);
ttm_put_pages(&h, count, ttm->page_flags, ttm->caching_state,
ttm->dma_address);
ttm->state = tt_unpopulated;
ttm->first_himem_page = ttm->num_pages;
ttm->last_lomem_page = -1;

2
include/drm/ttm/ttm_bo_driver.h
View File

@ -149,6 +149,7 @@ enum ttm_caching_state {
* @swap_storage: Pointer to shmem struct file for swap storage.
* @caching_state: The current caching state of the pages.
* @state: The current binding state of the pages.
* @dma_address: The DMA (bus) addresses of the pages (if TTM_PAGE_FLAG_DMA32)
*
* This is a structure holding the pages, caching- and aperture binding
* status for a buffer object that isn't backed by fixed (VRAM / AGP)
@ -173,6 +174,7 @@ struct ttm_tt {
tt_unbound,
tt_unpopulated,
} state;
dma_addr_t *dma_address;
};
#define TTM_MEMTYPE_FLAG_FIXED (1 << 0) /* Fixed (on-card) PCI memory */

8
include/drm/ttm/ttm_page_alloc.h
View File

@ -36,11 +36,13 @@
* @flags: ttm flags for page allocation.
* @cstate: ttm caching state for the page.
* @count: number of pages to allocate.
* @dma_address: The DMA (bus) address of pages (if TTM_PAGE_FLAG_DMA32 set).
*/
int ttm_get_pages(struct list_head *pages,
int flags,
enum ttm_caching_state cstate,
unsigned count);
unsigned count,
dma_addr_t *dma_address);
/**
* Put linked list of pages to pool.
*
@ -49,11 +51,13 @@ int ttm_get_pages(struct list_head *pages,
* count.
* @flags: ttm flags for page allocation.
* @cstate: ttm caching state.
* @dma_address: The DMA (bus) address of pages (if TTM_PAGE_FLAG_DMA32 set).
*/
void ttm_put_pages(struct list_head *pages,
unsigned page_count,
int flags,
enum ttm_caching_state cstate);
enum ttm_caching_state cstate,
dma_addr_t *dma_address);
/**
* Initialize pool allocator.
*/