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

Signed-off-by: Christian König christian.koenig@amd.com --- drivers/gpu/drm/ttm/ttm_bo.c | 2 +- drivers/gpu/drm/ttm/ttm_tt.c | 61 ++++++++++++++++-------------------- include/drm/ttm/ttm_bo_api.h | 4 --- include/drm/ttm/ttm_tt.h | 3 +- 4 files changed, 29 insertions(+), 41 deletions(-)

diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c index 92d60585deb1..1441bc86ac1c 100644 --- a/drivers/gpu/drm/ttm/ttm_bo.c +++ b/drivers/gpu/drm/ttm/ttm_bo.c @@ -1588,7 +1588,7 @@ 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:

/** diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c index a4f0296effac..014fb3656407 100644 --- a/drivers/gpu/drm/ttm/ttm_tt.c +++ b/drivers/gpu/drm/ttm/ttm_tt.c @@ -211,8 +211,7 @@ void ttm_tt_destroy(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; @@ -307,73 +306,69 @@ 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;

BUG_ON(ttm->caching_state != tt_cached);

- 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; @@ -392,13 +387,11 @@ 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; } diff --git a/include/drm/ttm/ttm_bo_api.h b/include/drm/ttm/ttm_bo_api.h index 89ad6f213fc0..6f9ff8a436a5 100644 --- a/include/drm/ttm/ttm_bo_api.h +++ b/include/drm/ttm/ttm_bo_api.h @@ -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 ttm_bound; bool evicted; diff --git a/include/drm/ttm/ttm_tt.h b/include/drm/ttm/ttm_tt.h index c777b72063db..cd3cbeb7ce90 100644 --- a/include/drm/ttm/ttm_tt.h +++ b/include/drm/ttm/ttm_tt.h @@ -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) @@ -178,7 +177,7 @@ 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