From f9e2a03e110ad0c78e69201f59d18dc1c487efac Mon Sep 17 00:00:00 2001 From: Christian König Date: Tue, 6 Oct 2020 16:30:09 +0200 Subject: drm/ttm: remove swap LRU v3 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Instead evict round robin from each devices SYSTEM and TT domain. v2: reorder num_pages access reported by Dan's script v3: fix rebase fallout, num_pages should be 32bit Signed-off-by: Christian König Tested-by: Nirmoy Das Reviewed-by: Huang Rui Reviewed-by: Matthew Auld Link: https://patchwork.freedesktop.org/patch/424009/ --- drivers/gpu/drm/ttm/ttm_bo.c | 29 ------------------- drivers/gpu/drm/ttm/ttm_bo_util.c | 1 - drivers/gpu/drm/ttm/ttm_device.c | 60 +++++++++++++++++++++++++++++---------- 3 files changed, 45 insertions(+), 45 deletions(-) (limited to 'drivers/gpu/drm/ttm') diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c index 66e00b404ec3..3673157527ff 100644 --- a/drivers/gpu/drm/ttm/ttm_bo.c +++ b/drivers/gpu/drm/ttm/ttm_bo.c @@ -73,7 +73,6 @@ static void ttm_bo_del_from_lru(struct ttm_buffer_object *bo) { struct ttm_device *bdev = bo->bdev; - list_del_init(&bo->swap); list_del_init(&bo->lru); if (bdev->funcs->del_from_lru_notify) @@ -105,16 +104,6 @@ void ttm_bo_move_to_lru_tail(struct ttm_buffer_object *bo, man = ttm_manager_type(bdev, mem->mem_type); list_move_tail(&bo->lru, &man->lru[bo->priority]); - if (man->use_tt && bo->ttm && - !(bo->ttm->page_flags & (TTM_PAGE_FLAG_SG | - TTM_PAGE_FLAG_SWAPPED))) { - struct list_head *swap; - - swap = &ttm_glob.swap_lru[bo->priority]; - list_move_tail(&bo->swap, swap); - } else { - list_del_init(&bo->swap); - } if (bdev->funcs->del_from_lru_notify) bdev->funcs->del_from_lru_notify(bo); @@ -129,9 +118,6 @@ void ttm_bo_move_to_lru_tail(struct ttm_buffer_object *bo, ttm_bo_bulk_move_set_pos(&bulk->vram[bo->priority], bo); break; } - if (bo->ttm && !(bo->ttm->page_flags & - (TTM_PAGE_FLAG_SG | TTM_PAGE_FLAG_SWAPPED))) - ttm_bo_bulk_move_set_pos(&bulk->swap[bo->priority], bo); } } EXPORT_SYMBOL(ttm_bo_move_to_lru_tail); @@ -169,20 +155,6 @@ void ttm_bo_bulk_move_lru_tail(struct ttm_lru_bulk_move *bulk) list_bulk_move_tail(&man->lru[i], &pos->first->lru, &pos->last->lru); } - - for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) { - struct ttm_lru_bulk_move_pos *pos = &bulk->swap[i]; - struct list_head *lru; - - if (!pos->first) - continue; - - dma_resv_assert_held(pos->first->base.resv); - dma_resv_assert_held(pos->last->base.resv); - - lru = &ttm_glob.swap_lru[i]; - list_bulk_move_tail(lru, &pos->first->swap, &pos->last->swap); - } } EXPORT_SYMBOL(ttm_bo_bulk_move_lru_tail); @@ -1065,7 +1037,6 @@ int ttm_bo_init_reserved(struct ttm_device *bdev, kref_init(&bo->kref); INIT_LIST_HEAD(&bo->lru); INIT_LIST_HEAD(&bo->ddestroy); - INIT_LIST_HEAD(&bo->swap); bo->bdev = bdev; bo->type = type; bo->mem.mem_type = TTM_PL_SYSTEM; diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c b/drivers/gpu/drm/ttm/ttm_bo_util.c index 031e5819fec4..a2a17c84ceb3 100644 --- a/drivers/gpu/drm/ttm/ttm_bo_util.c +++ b/drivers/gpu/drm/ttm/ttm_bo_util.c @@ -303,7 +303,6 @@ static int ttm_buffer_object_transfer(struct ttm_buffer_object *bo, atomic_inc(&ttm_glob.bo_count); INIT_LIST_HEAD(&fbo->base.ddestroy); INIT_LIST_HEAD(&fbo->base.lru); - INIT_LIST_HEAD(&fbo->base.swap); fbo->base.moving = NULL; drm_vma_node_reset(&fbo->base.base.vma_node); diff --git a/drivers/gpu/drm/ttm/ttm_device.c b/drivers/gpu/drm/ttm/ttm_device.c index b1424189fdfb..b9e3bfb60cd2 100644 --- a/drivers/gpu/drm/ttm/ttm_device.c +++ b/drivers/gpu/drm/ttm/ttm_device.c @@ -67,7 +67,6 @@ static int ttm_global_init(void) unsigned long num_pages; struct sysinfo si; int ret = 0; - unsigned i; mutex_lock(&ttm_global_mutex); if (++ttm_glob_use_count > 1) @@ -90,8 +89,6 @@ static int ttm_global_init(void) goto out; } - for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) - INIT_LIST_HEAD(&glob->swap_lru[i]); INIT_LIST_HEAD(&glob->device_list); atomic_set(&glob->bo_count, 0); @@ -109,27 +106,60 @@ out: int ttm_global_swapout(struct ttm_operation_ctx *ctx, gfp_t gfp_flags) { struct ttm_global *glob = &ttm_glob; + struct ttm_device *bdev; + int ret = -EBUSY; + + mutex_lock(&ttm_global_mutex); + list_for_each_entry(bdev, &glob->device_list, device_list) { + ret = ttm_device_swapout(bdev, ctx, gfp_flags); + if (ret > 0) { + list_move_tail(&bdev->device_list, &glob->device_list); + break; + } + } + mutex_unlock(&ttm_global_mutex); + return ret; +} +EXPORT_SYMBOL(ttm_global_swapout); + +int ttm_device_swapout(struct ttm_device *bdev, struct ttm_operation_ctx *ctx, + gfp_t gfp_flags) +{ + struct ttm_global *glob = &ttm_glob; + struct ttm_resource_manager *man; struct ttm_buffer_object *bo; - unsigned i; + unsigned i, j; int ret; spin_lock(&glob->lru_lock); - for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) { - list_for_each_entry(bo, &glob->swap_lru[i], swap) { - uint32_t 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; + for (i = TTM_PL_SYSTEM; i < TTM_NUM_MEM_TYPES; ++i) { + man = ttm_manager_type(bdev, i); + if (!man || !man->use_tt) + continue; + + for (j = 0; j < TTM_MAX_BO_PRIORITY; ++j) { + list_for_each_entry(bo, &man->lru[j], lru) { + uint32_t num_pages; + + 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(&glob->lru_lock); return 0; } -EXPORT_SYMBOL(ttm_global_swapout); +EXPORT_SYMBOL(ttm_device_swapout); static void ttm_init_sysman(struct ttm_device *bdev) { -- cgit v1.2.3