Instead of duplicating that at different places add an iterator over all the resources in a resource manager.
Signed-off-by: Christian König christian.koenig@amd.com --- drivers/gpu/drm/ttm/ttm_bo.c | 41 +++++++++++---------------- drivers/gpu/drm/ttm/ttm_device.c | 37 ++++++++++++------------ drivers/gpu/drm/ttm/ttm_resource.c | 45 ++++++++++++++++++++++++++++++ include/drm/ttm/ttm_resource.h | 23 +++++++++++++++ 4 files changed, 102 insertions(+), 44 deletions(-)
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c index 09a62ad06b9d..98ad0b819deb 100644 --- a/drivers/gpu/drm/ttm/ttm_bo.c +++ b/drivers/gpu/drm/ttm/ttm_bo.c @@ -585,38 +585,29 @@ int ttm_mem_evict_first(struct ttm_device *bdev, struct ww_acquire_ctx *ticket) { struct ttm_buffer_object *bo = NULL, *busy_bo = NULL; + struct ttm_resource_cursor cursor; struct ttm_resource *res; bool locked = false; - unsigned i; int ret;
spin_lock(&bdev->lru_lock); - for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) { - list_for_each_entry(res, &man->lru[i], lru) { - bool busy; - - bo = res->bo; - if (!ttm_bo_evict_swapout_allowable(bo, ctx, place, - &locked, &busy)) { - if (busy && !busy_bo && ticket != - dma_resv_locking_ctx(bo->base.resv)) - busy_bo = bo; - continue; - } - - if (!ttm_bo_get_unless_zero(bo)) { - if (locked) - dma_resv_unlock(bo->base.resv); - continue; - } - break; + ttm_resource_manager_for_each_res(man, &cursor, res) { + bool busy; + + if (!ttm_bo_evict_swapout_allowable(res->bo, ctx, place, + &locked, &busy)) { + if (busy && !busy_bo && ticket != + dma_resv_locking_ctx(bo->base.resv)) + busy_bo = res->bo; + continue; }
- /* If the inner loop terminated early, we have our candidate */ - if (&res->lru != &man->lru[i]) - break; - - bo = NULL; + if (!ttm_bo_get_unless_zero(res->bo)) { + if (locked) + dma_resv_unlock(res->bo->base.resv); + continue; + } + bo = res->bo; }
if (!bo) { diff --git a/drivers/gpu/drm/ttm/ttm_device.c b/drivers/gpu/drm/ttm/ttm_device.c index a6e533c3ac56..8225575d2d0f 100644 --- a/drivers/gpu/drm/ttm/ttm_device.c +++ b/drivers/gpu/drm/ttm/ttm_device.c @@ -130,10 +130,11 @@ EXPORT_SYMBOL(ttm_global_swapout); int ttm_device_swapout(struct ttm_device *bdev, struct ttm_operation_ctx *ctx, gfp_t gfp_flags) { + struct ttm_resource_cursor cursor; struct ttm_resource_manager *man; struct ttm_buffer_object *bo; struct ttm_resource *res; - unsigned i, j; + unsigned i; int ret;
spin_lock(&bdev->lru_lock); @@ -142,24 +143,22 @@ int ttm_device_swapout(struct ttm_device *bdev, struct ttm_operation_ctx *ctx, if (!man || !man->use_tt) continue;
- for (j = 0; j < TTM_MAX_BO_PRIORITY; ++j) { - list_for_each_entry(res, &man->lru[j], lru) { - uint32_t num_pages; - - bo = res->bo; - if (!bo->ttm || - bo->ttm->page_flags & TTM_PAGE_FLAG_SG || - bo->ttm->page_flags & TTM_PAGE_FLAG_SWAPPED) - continue; - - num_pages = bo->ttm->num_pages; - ret = ttm_bo_swapout(bo, ctx, gfp_flags); - /* ttm_bo_swapout has dropped the lru_lock */ - if (!ret) - return num_pages; - if (ret != -EBUSY) - return ret; - } + ttm_resource_manager_for_each_res(man, &cursor, res) { + uint32_t num_pages; + + bo = res->bo; + if (!bo->ttm || + bo->ttm->page_flags & TTM_PAGE_FLAG_SG || + bo->ttm->page_flags & TTM_PAGE_FLAG_SWAPPED) + continue; + + num_pages = bo->ttm->num_pages; + ret = ttm_bo_swapout(bo, ctx, gfp_flags); + /* ttm_bo_swapout has dropped the lru_lock */ + if (!ret) + return num_pages; + if (ret != -EBUSY) + return ret; } } spin_unlock(&bdev->lru_lock); diff --git a/drivers/gpu/drm/ttm/ttm_resource.c b/drivers/gpu/drm/ttm/ttm_resource.c index d4eac7c08e82..2349e264e58e 100644 --- a/drivers/gpu/drm/ttm/ttm_resource.c +++ b/drivers/gpu/drm/ttm/ttm_resource.c @@ -301,6 +301,51 @@ void ttm_resource_manager_debug(struct ttm_resource_manager *man, } EXPORT_SYMBOL(ttm_resource_manager_debug);
+/** + * ttm_resource_manager_first + * + * @man: resource manager to iterate over + * @cursor: cursor to record the position + * + * Returns the first resource from the resource manager. + */ +struct ttm_resource * +ttm_resource_manager_first(struct ttm_resource_manager *man, + struct ttm_resource_cursor *cursor) +{ + struct ttm_resource *res; + + for (cursor->priority = 0; cursor->priority < TTM_MAX_BO_PRIORITY; + ++cursor->priority) + list_for_each_entry(res, &man->lru[cursor->priority], lru) + return res; + + return NULL; +} + +/** + * ttm_resource_manager_next + * + * @man: resource manager to iterate over + * @cursor: cursor to record the position + * + * Returns the next resource from the resource manager. + */ +struct ttm_resource * +ttm_resource_manager_next(struct ttm_resource_manager *man, + struct ttm_resource_cursor *cursor, + struct ttm_resource *res) +{ + list_for_each_entry_continue(res, &man->lru[cursor->priority], lru) + return res; + + for (; cursor->priority < TTM_MAX_BO_PRIORITY; ++cursor->priority) + list_for_each_entry(res, &man->lru[cursor->priority], lru) + return res; + + return NULL; +} + static void ttm_kmap_iter_iomap_map_local(struct ttm_kmap_iter *iter, struct dma_buf_map *dmap, pgoff_t i) diff --git a/include/drm/ttm/ttm_resource.h b/include/drm/ttm/ttm_resource.h index 500711415ae9..a42cdb94fd9f 100644 --- a/include/drm/ttm/ttm_resource.h +++ b/include/drm/ttm/ttm_resource.h @@ -183,6 +183,17 @@ struct ttm_resource { struct list_head lru; };
+/** + * struct ttm_resource_cursor + * + * @priority: the current priority + * + * Cursor to iterate over the resources in a manager. + */ +struct ttm_resource_cursor { + unsigned int priority; +}; + /** * struct ttm_lru_bulk_move_pos * @@ -334,6 +345,18 @@ int ttm_resource_manager_evict_all(struct ttm_device *bdev, void ttm_resource_manager_debug(struct ttm_resource_manager *man, struct drm_printer *p);
+struct ttm_resource * +ttm_resource_manager_first(struct ttm_resource_manager *man, + struct ttm_resource_cursor *cursor); +struct ttm_resource * +ttm_resource_manager_next(struct ttm_resource_manager *man, + struct ttm_resource_cursor *cursor, + struct ttm_resource *res); + +#define ttm_resource_manager_for_each_res(man, cursor, res) \ + for (res = ttm_resource_manager_first(man, cursor); res; \ + res = ttm_resource_manager_next(man, cursor, res)) + struct ttm_kmap_iter * ttm_kmap_iter_iomap_init(struct ttm_kmap_iter_iomap *iter_io, struct io_mapping *iomap,