diff options
Diffstat (limited to 'drivers/gpu/drm/ttm/ttm_tt.c')
| -rw-r--r-- | drivers/gpu/drm/ttm/ttm_tt.c | 71 |
1 files changed, 3 insertions, 68 deletions
diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c index f43fa69a1e65..87dd887f7806 100644 --- a/drivers/gpu/drm/ttm/ttm_tt.c +++ b/drivers/gpu/drm/ttm/ttm_tt.c @@ -38,7 +38,6 @@ #include <drm/drm_cache.h> #include <drm/ttm/ttm_bo_driver.h> #include <drm/ttm/ttm_page_alloc.h> -#include <drm/ttm/ttm_set_memory.h> /** * Allocates a ttm structure for the given BO. @@ -115,81 +114,19 @@ static int ttm_sg_tt_alloc_page_directory(struct ttm_dma_tt *ttm) return 0; } -static int ttm_tt_set_page_caching(struct page *p, - enum ttm_caching_state c_old, - enum ttm_caching_state c_new) -{ - int ret = 0; - - if (PageHighMem(p)) - return 0; - - if (c_old != tt_cached) { - /* p isn't in the default caching state, set it to - * writeback first to free its current memtype. */ - - ret = ttm_set_pages_wb(p, 1); - if (ret) - return ret; - } - - if (c_new == tt_wc) - ret = ttm_set_pages_wc(p, 1); - else if (c_new == tt_uncached) - ret = ttm_set_pages_uc(p, 1); - - return ret; -} - -/* - * Change caching policy for the linear kernel map - * for range of pages in a ttm. - */ - static int ttm_tt_set_caching(struct ttm_tt *ttm, enum ttm_caching_state c_state) { - int i, j; - struct page *cur_page; - int ret; - if (ttm->caching_state == c_state) return 0; - if (!ttm_tt_is_populated(ttm)) { - /* Change caching but don't populate */ - ttm->caching_state = c_state; - return 0; - } - - if (ttm->caching_state == tt_cached) - drm_clflush_pages(ttm->pages, ttm->num_pages); - - for (i = 0; i < ttm->num_pages; ++i) { - cur_page = ttm->pages[i]; - if (likely(cur_page != NULL)) { - ret = ttm_tt_set_page_caching(cur_page, - ttm->caching_state, - c_state); - if (unlikely(ret != 0)) - goto out_err; - } - } + /* Can't change the caching state after TT is populated */ + if (WARN_ON_ONCE(ttm_tt_is_populated(ttm))) + return -EINVAL; ttm->caching_state = c_state; return 0; - -out_err: - for (j = 0; j < i; ++j) { - cur_page = ttm->pages[j]; - if (likely(cur_page != NULL)) { - (void)ttm_tt_set_page_caching(cur_page, c_state, - ttm->caching_state); - } - } - - return ret; } int ttm_tt_set_placement_caching(struct ttm_tt *ttm, uint32_t placement) @@ -358,8 +295,6 @@ int ttm_tt_swapout(struct ttm_bo_device *bdev, int i; int ret = -ENOMEM; - BUG_ON(ttm->caching_state != tt_cached); - if (!persistent_swap_storage) { swap_storage = shmem_file_setup("ttm swap", ttm->num_pages << PAGE_SHIFT, |