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drm/ttm: remove persistent_swap_storage

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Not used any more. Cleanup the code as well while at it.

Signed-off-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/391079/?series=81804&rev=1
Reviewed-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Christian König 2020-09-17 13:27:35 +02:00
parent 84d28b4717
commit ab861424cb
4 changed files with 29 additions and 41 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
drivers/gpu/drm/ttm/ttm_bo.c
View file

@ -1583,7 +1583,7 @@ int ttm_bo_swapout(struct ttm_bo_global *glob, struct ttm_operation_ctx *ctx)
if (bo->bdev->driver->swap_notify)
bo->bdev->driver->swap_notify(bo);
ret = ttm_tt_swapout(bo->bdev, bo->ttm, bo->persistent_swap_storage);
ret = ttm_tt_swapout(bo->bdev, bo->ttm);
out:
/**

61
drivers/gpu/drm/ttm/ttm_tt.c
View file

@ -148,8 +148,7 @@ void ttm_tt_destroy_common(struct ttm_bo_device *bdev, struct ttm_tt *ttm)
{
ttm_tt_unpopulate(bdev, ttm);
if (!(ttm->page_flags & TTM_PAGE_FLAG_PERSISTENT_SWAP) &&
ttm->swap_storage)
if (ttm->swap_storage)
fput(ttm->swap_storage);
ttm->swap_storage = NULL;
@ -249,71 +248,67 @@ int ttm_tt_swapin(struct ttm_tt *ttm)
struct file *swap_storage;
struct page *from_page;
struct page *to_page;
int i;
int ret = -ENOMEM;
gfp_t gfp_mask;
int i, ret;
swap_storage = ttm->swap_storage;
BUG_ON(swap_storage == NULL);
swap_space = swap_storage->f_mapping;
gfp_mask = mapping_gfp_mask(swap_space);
if (ttm->page_flags & TTM_PAGE_FLAG_NO_RETRY)
gfp_mask |= __GFP_RETRY_MAYFAIL;
for (i = 0; i < ttm->num_pages; ++i) {
gfp_t gfp_mask = mapping_gfp_mask(swap_space);
gfp_mask |= (ttm->page_flags & TTM_PAGE_FLAG_NO_RETRY ? __GFP_RETRY_MAYFAIL : 0);
from_page = shmem_read_mapping_page_gfp(swap_space, i, gfp_mask);
from_page = shmem_read_mapping_page_gfp(swap_space, i,
gfp_mask);
if (IS_ERR(from_page)) {
ret = PTR_ERR(from_page);
goto out_err;
}
to_page = ttm->pages[i];
if (unlikely(to_page == NULL))
if (unlikely(to_page == NULL)) {
ret = -ENOMEM;
goto out_err;
}
copy_highpage(to_page, from_page);
put_page(from_page);
}
if (!(ttm->page_flags & TTM_PAGE_FLAG_PERSISTENT_SWAP))
fput(swap_storage);
fput(swap_storage);
ttm->swap_storage = NULL;
ttm->page_flags &= ~TTM_PAGE_FLAG_SWAPPED;
return 0;
out_err:
return ret;
}
int ttm_tt_swapout(struct ttm_bo_device *bdev,
struct ttm_tt *ttm, struct file *persistent_swap_storage)
int ttm_tt_swapout(struct ttm_bo_device *bdev, struct ttm_tt *ttm)
{
struct address_space *swap_space;
struct file *swap_storage;
struct page *from_page;
struct page *to_page;
int i;
int ret = -ENOMEM;
gfp_t gfp_mask;
int i, ret;
if (!persistent_swap_storage) {
swap_storage = shmem_file_setup("ttm swap",
ttm->num_pages << PAGE_SHIFT,
0);
if (IS_ERR(swap_storage)) {
pr_err("Failed allocating swap storage\n");
return PTR_ERR(swap_storage);
}
} else {
swap_storage = persistent_swap_storage;
swap_storage = shmem_file_setup("ttm swap",
ttm->num_pages << PAGE_SHIFT,
0);
if (IS_ERR(swap_storage)) {
pr_err("Failed allocating swap storage\n");
return PTR_ERR(swap_storage);
}
swap_space = swap_storage->f_mapping;
gfp_mask = mapping_gfp_mask(swap_space);
if (ttm->page_flags & TTM_PAGE_FLAG_NO_RETRY)
gfp_mask |= __GFP_RETRY_MAYFAIL;
for (i = 0; i < ttm->num_pages; ++i) {
gfp_t gfp_mask = mapping_gfp_mask(swap_space);
gfp_mask |= (ttm->page_flags & TTM_PAGE_FLAG_NO_RETRY ? __GFP_RETRY_MAYFAIL : 0);
from_page = ttm->pages[i];
if (unlikely(from_page == NULL))
continue;
@ -332,13 +327,11 @@ int ttm_tt_swapout(struct ttm_bo_device *bdev,
ttm_tt_unpopulate(bdev, ttm);
ttm->swap_storage = swap_storage;
ttm->page_flags |= TTM_PAGE_FLAG_SWAPPED;
if (persistent_swap_storage)
ttm->page_flags |= TTM_PAGE_FLAG_PERSISTENT_SWAP;
return 0;
out_err:
if (!persistent_swap_storage)
fput(swap_storage);
fput(swap_storage);
return ret;
}

4
include/drm/ttm/ttm_bo_api.h
View file

@ -90,9 +90,6 @@ struct ttm_tt;
* @kref: Reference count of this buffer object. When this refcount reaches
* zero, the object is destroyed or put on the delayed delete list.
* @mem: structure describing current placement.
* @persistent_swap_storage: Usually the swap storage is deleted for buffers
* pinned in physical memory. If this behaviour is not desired, this member
* holds a pointer to a persistent shmem object.
* @ttm: TTM structure holding system pages.
* @evicted: Whether the object was evicted without user-space knowing.
* @deleted: True if the object is only a zombie and already deleted.
@ -139,7 +136,6 @@ struct ttm_buffer_object {
*/
struct ttm_resource mem;
struct file *persistent_swap_storage;
struct ttm_tt *ttm;
bool deleted;

3
include/drm/ttm/ttm_tt.h
View file

@ -36,7 +36,6 @@ struct ttm_operation_ctx;
#define TTM_PAGE_FLAG_WRITE (1 << 3)
#define TTM_PAGE_FLAG_SWAPPED (1 << 4)
#define TTM_PAGE_FLAG_PERSISTENT_SWAP (1 << 5)
#define TTM_PAGE_FLAG_ZERO_ALLOC (1 << 6)
#define TTM_PAGE_FLAG_DMA32 (1 << 7)
#define TTM_PAGE_FLAG_SG (1 << 8)
@ -185,7 +184,7 @@ int ttm_tt_swapin(struct ttm_tt *ttm);
* and cache flushes and potential page splitting / combining.
*/
int ttm_tt_set_placement_caching(struct ttm_tt *ttm, uint32_t placement);
int ttm_tt_swapout(struct ttm_bo_device *bdev, struct ttm_tt *ttm, struct file *persistent_swap_storage);
int ttm_tt_swapout(struct ttm_bo_device *bdev, struct ttm_tt *ttm);
/**
* ttm_tt_populate - allocate pages for a ttm