drm/ttm: cleanup LRU handling further

We only completely delete the BO from the LRU on destruction.

Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Link: https://patchwork.freedesktop.org/patch/404618/

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 0768c86..ad91c0c 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -653,9 +653,11 @@ void amdgpu_vm_move_to_lru_tail(struct amdgpu_device *adev,
                if (!bo->parent)
                        continue;
 
-               ttm_bo_move_to_lru_tail(&bo->tbo, &vm->lru_bulk_move);
+               ttm_bo_move_to_lru_tail(&bo->tbo, &bo->tbo.mem,
+                                       &vm->lru_bulk_move);
                if (bo->shadow)
                        ttm_bo_move_to_lru_tail(&bo->shadow->tbo,
+                                               &bo->shadow->tbo.mem,
                                                &vm->lru_bulk_move);
        }
        spin_unlock(&ttm_bo_glob.lru_lock);

diff --git a/drivers/gpu/drm/qxl/qxl_release.c b/drivers/gpu/drm/qxl/qxl_release.c
index e75e364..0fcfc95 100644 (file)
--- a/drivers/gpu/drm/qxl/qxl_release.c
+++ b/drivers/gpu/drm/qxl/qxl_release.c
@@ -456,7 +456,7 @@ void qxl_release_fence_buffer_objects(struct qxl_release *release)
                bo = entry->bo;
 
                dma_resv_add_shared_fence(bo->base.resv, &release->base);
-               ttm_bo_move_to_lru_tail(bo, NULL);
+               ttm_bo_move_to_lru_tail(bo, &bo->mem, NULL);
                dma_resv_unlock(bo->base.resv);
        }
        spin_unlock(&ttm_bo_glob.lru_lock);

diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index c702ec5..31e8b3d 100644 (file)
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -110,40 +110,14 @@ static struct kobj_type ttm_bo_glob_kobj_type  = {
        .default_attrs = ttm_bo_global_attrs
 };
 
-static void ttm_bo_add_mem_to_lru(struct ttm_buffer_object *bo,
-                                 struct ttm_resource *mem)
-{
-       struct ttm_bo_device *bdev = bo->bdev;
-       struct ttm_resource_manager *man;
-
-       if (!list_empty(&bo->lru) || bo->pin_count)
-               return;
-
-       man = ttm_manager_type(bdev, mem->mem_type);
-       list_add_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))) {
-               list_add_tail(&bo->swap, &ttm_bo_glob.swap_lru[bo->priority]);
-       }
-}
-
 static void ttm_bo_del_from_lru(struct ttm_buffer_object *bo)
 {
        struct ttm_bo_device *bdev = bo->bdev;
-       bool notify = false;
 
-       if (!list_empty(&bo->swap)) {
-               list_del_init(&bo->swap);
-               notify = true;
-       }
-       if (!list_empty(&bo->lru)) {
-               list_del_init(&bo->lru);
-               notify = true;
-       }
+       list_del_init(&bo->swap);
+       list_del_init(&bo->lru);
 
-       if (notify && bdev->driver->del_from_lru_notify)
+       if (bdev->driver->del_from_lru_notify)
                bdev->driver->del_from_lru_notify(bo);
 }
 
@@ -156,12 +130,30 @@ static void ttm_bo_bulk_move_set_pos(struct ttm_lru_bulk_move_pos *pos,
 }
 
 void ttm_bo_move_to_lru_tail(struct ttm_buffer_object *bo,
+                            struct ttm_resource *mem,
                             struct ttm_lru_bulk_move *bulk)
 {
+       struct ttm_bo_device *bdev = bo->bdev;
+       struct ttm_resource_manager *man;
+
        dma_resv_assert_held(bo->base.resv);
 
-       ttm_bo_del_from_lru(bo);
-       ttm_bo_add_mem_to_lru(bo, &bo->mem);
+       if (bo->pin_count)
+               return;
+
+       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_bo_glob.swap_lru[bo->priority];
+               list_move_tail(&bo->swap, swap);
+       }
+
+       if (bdev->driver->del_from_lru_notify)
+               bdev->driver->del_from_lru_notify(bo);
 
        if (bulk && !bo->pin_count) {
                switch (bo->mem.mem_type) {
@@ -517,8 +509,7 @@ static void ttm_bo_release(struct kref *kref)
                 */
                if (WARN_ON(bo->pin_count)) {
                        bo->pin_count = 0;
-                       ttm_bo_del_from_lru(bo);
-                       ttm_bo_add_mem_to_lru(bo, &bo->mem);
+                       ttm_bo_move_to_lru_tail(bo, &bo->mem, NULL);
                }
 
                kref_init(&bo->kref);
@@ -860,8 +851,7 @@ static int ttm_bo_mem_placement(struct ttm_buffer_object *bo,
        mem->placement = place->flags;
 
        spin_lock(&ttm_bo_glob.lru_lock);
-       ttm_bo_del_from_lru(bo);
-       ttm_bo_add_mem_to_lru(bo, mem);
+       ttm_bo_move_to_lru_tail(bo, mem, NULL);
        spin_unlock(&ttm_bo_glob.lru_lock);
 
        return 0;

diff --git a/drivers/gpu/drm/ttm/ttm_execbuf_util.c b/drivers/gpu/drm/ttm/ttm_execbuf_util.c
index 8a8f1a6..9fa36ed 100644 (file)
--- a/drivers/gpu/drm/ttm/ttm_execbuf_util.c
+++ b/drivers/gpu/drm/ttm/ttm_execbuf_util.c
@@ -55,7 +55,7 @@ void ttm_eu_backoff_reservation(struct ww_acquire_ctx *ticket,
        list_for_each_entry(entry, list, head) {
                struct ttm_buffer_object *bo = entry->bo;
 
-               ttm_bo_move_to_lru_tail(bo, NULL);
+               ttm_bo_move_to_lru_tail(bo, &bo->mem, NULL);
                dma_resv_unlock(bo->base.resv);
        }
        spin_unlock(&ttm_bo_glob.lru_lock);
@@ -162,7 +162,7 @@ void ttm_eu_fence_buffer_objects(struct ww_acquire_ctx *ticket,
                        dma_resv_add_shared_fence(bo->base.resv, fence);
                else
                        dma_resv_add_excl_fence(bo->base.resv, fence);
-               ttm_bo_move_to_lru_tail(bo, NULL);
+               ttm_bo_move_to_lru_tail(bo, &bo->mem, NULL);
                dma_resv_unlock(bo->base.resv);
        }
        spin_unlock(&ttm_bo_glob.lru_lock);

diff --git a/include/drm/ttm/ttm_bo_api.h b/include/drm/ttm/ttm_bo_api.h
index 0d4e3fc..e17be32 100644 (file)
--- a/include/drm/ttm/ttm_bo_api.h
+++ b/include/drm/ttm/ttm_bo_api.h
@@ -309,6 +309,7 @@ void ttm_bo_put(struct ttm_buffer_object *bo);
  * ttm_bo_move_to_lru_tail
  *
  * @bo: The buffer object.
+ * @mem: Resource object.
  * @bulk: optional bulk move structure to remember BO positions
  *
  * Move this BO to the tail of all lru lists used to lookup and reserve an
@@ -316,6 +317,7 @@ void ttm_bo_put(struct ttm_buffer_object *bo);
  * held, and is used to make a BO less likely to be considered for eviction.
  */
 void ttm_bo_move_to_lru_tail(struct ttm_buffer_object *bo,
+                            struct ttm_resource *mem,
                             struct ttm_lru_bulk_move *bulk);
 
 /**

diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h
index b1d1ce9..4233484 100644 (file)
--- a/include/drm/ttm/ttm_bo_driver.h
+++ b/include/drm/ttm/ttm_bo_driver.h
@@ -491,10 +491,11 @@ static inline int ttm_bo_reserve_slowpath(struct ttm_buffer_object *bo,
        return 0;
 }
 
-static inline void ttm_bo_move_to_lru_tail_unlocked(struct ttm_buffer_object *bo)
+static inline void
+ttm_bo_move_to_lru_tail_unlocked(struct ttm_buffer_object *bo)
 {
        spin_lock(&ttm_bo_glob.lru_lock);
-       ttm_bo_move_to_lru_tail(bo, NULL);
+       ttm_bo_move_to_lru_tail(bo, &bo->mem, NULL);
        spin_unlock(&ttm_bo_glob.lru_lock);
 }