}
}
+static void radeon_update_memory_usage(struct radeon_bo *bo,
+ unsigned mem_type, int sign)
+{
+ struct radeon_device *rdev = bo->rdev;
+ u64 size = (u64)bo->tbo.num_pages << PAGE_SHIFT;
+
+ switch (mem_type) {
+ case TTM_PL_TT:
+ if (sign > 0)
+ atomic64_add(size, &rdev->gtt_usage);
+ else
+ atomic64_sub(size, &rdev->gtt_usage);
+ break;
+ case TTM_PL_VRAM:
+ if (sign > 0)
+ atomic64_add(size, &rdev->vram_usage);
+ else
+ atomic64_sub(size, &rdev->vram_usage);
+ break;
+ }
+}
+
static void radeon_ttm_bo_destroy(struct ttm_buffer_object *tbo)
{
struct radeon_bo *bo;
bo = container_of(tbo, struct radeon_bo, tbo);
+
+ radeon_update_memory_usage(bo, bo->tbo.mem.mem_type, -1);
+
mutex_lock(&bo->rdev->gem.mutex);
list_del_init(&bo->list);
mutex_unlock(&bo->rdev->gem.mutex);
size = ALIGN(size, PAGE_SIZE);
- rdev->mman.bdev.dev_mapping = rdev->ddev->dev_mapping;
if (kernel) {
type = ttm_bo_type_kernel;
} else if (sg) {
bo->surface_reg = -1;
INIT_LIST_HEAD(&bo->list);
INIT_LIST_HEAD(&bo->va);
+ bo->initial_domain = domain & (RADEON_GEM_DOMAIN_VRAM |
+ RADEON_GEM_DOMAIN_GTT |
+ RADEON_GEM_DOMAIN_CPU);
radeon_ttm_placement_from_domain(bo, domain);
/* Kernel allocation are uninterruptible */
down_read(&rdev->pm.mclk_lock);
arch_phys_wc_del(rdev->mc.vram_mtrr);
}
-void radeon_bo_list_add_object(struct radeon_bo_list *lobj,
- struct list_head *head)
+/* Returns how many bytes TTM can move per IB.
+ */
+static u64 radeon_bo_get_threshold_for_moves(struct radeon_device *rdev)
{
- if (lobj->written) {
- list_add(&lobj->tv.head, head);
- } else {
- list_add_tail(&lobj->tv.head, head);
- }
+ u64 real_vram_size = rdev->mc.real_vram_size;
+ u64 vram_usage = atomic64_read(&rdev->vram_usage);
+
+ /* This function is based on the current VRAM usage.
+ *
+ * - If all of VRAM is free, allow relocating the number of bytes that
+ * is equal to 1/4 of the size of VRAM for this IB.
+
+ * - If more than one half of VRAM is occupied, only allow relocating
+ * 1 MB of data for this IB.
+ *
+ * - From 0 to one half of used VRAM, the threshold decreases
+ * linearly.
+ * __________________
+ * 1/4 of -|\ |
+ * VRAM | \ |
+ * | \ |
+ * | \ |
+ * | \ |
+ * | \ |
+ * | \ |
+ * | \________|1 MB
+ * |----------------|
+ * VRAM 0 % 100 %
+ * used used
+ *
+ * Note: It's a threshold, not a limit. The threshold must be crossed
+ * for buffer relocations to stop, so any buffer of an arbitrary size
+ * can be moved as long as the threshold isn't crossed before
+ * the relocation takes place. We don't want to disable buffer
+ * relocations completely.
+ *
+ * The idea is that buffers should be placed in VRAM at creation time
+ * and TTM should only do a minimum number of relocations during
+ * command submission. In practice, you need to submit at least
+ * a dozen IBs to move all buffers to VRAM if they are in GTT.
+ *
+ * Also, things can get pretty crazy under memory pressure and actual
+ * VRAM usage can change a lot, so playing safe even at 50% does
+ * consistently increase performance.
+ */
+
+ u64 half_vram = real_vram_size >> 1;
+ u64 half_free_vram = vram_usage >= half_vram ? 0 : half_vram - vram_usage;
+ u64 bytes_moved_threshold = half_free_vram >> 1;
+ return max(bytes_moved_threshold, 1024*1024ull);
}
-int radeon_bo_list_validate(struct ww_acquire_ctx *ticket,
+int radeon_bo_list_validate(struct radeon_device *rdev,
+ struct ww_acquire_ctx *ticket,
struct list_head *head, int ring)
{
- struct radeon_bo_list *lobj;
+ struct radeon_cs_reloc *lobj;
struct radeon_bo *bo;
- u32 domain;
int r;
+ u64 bytes_moved = 0, initial_bytes_moved;
+ u64 bytes_moved_threshold = radeon_bo_get_threshold_for_moves(rdev);
r = ttm_eu_reserve_buffers(ticket, head);
if (unlikely(r != 0)) {
return r;
}
+
list_for_each_entry(lobj, head, tv.head) {
- bo = lobj->bo;
+ bo = lobj->robj;
if (!bo->pin_count) {
- domain = lobj->domain;
-
+ u32 domain = lobj->domain;
+ u32 current_domain =
+ radeon_mem_type_to_domain(bo->tbo.mem.mem_type);
+
+ /* Check if this buffer will be moved and don't move it
+ * if we have moved too many buffers for this IB already.
+ *
+ * Note that this allows moving at least one buffer of
+ * any size, because it doesn't take the current "bo"
+ * into account. We don't want to disallow buffer moves
+ * completely.
+ */
+ if (current_domain != RADEON_GEM_DOMAIN_CPU &&
+ (domain & current_domain) == 0 && /* will be moved */
+ bytes_moved > bytes_moved_threshold) {
+ /* don't move it */
+ domain = current_domain;
+ }
+
retry:
radeon_ttm_placement_from_domain(bo, domain);
if (ring == R600_RING_TYPE_UVD_INDEX)
radeon_uvd_force_into_uvd_segment(bo);
- r = ttm_bo_validate(&bo->tbo, &bo->placement,
- true, false);
+
+ initial_bytes_moved = atomic64_read(&rdev->num_bytes_moved);
+ r = ttm_bo_validate(&bo->tbo, &bo->placement, true, false);
+ bytes_moved += atomic64_read(&rdev->num_bytes_moved) -
+ initial_bytes_moved;
+
if (unlikely(r)) {
if (r != -ERESTARTSYS && domain != lobj->alt_domain) {
domain = lobj->alt_domain;
}
void radeon_bo_move_notify(struct ttm_buffer_object *bo,
- struct ttm_mem_reg *mem)
+ struct ttm_mem_reg *new_mem)
{
struct radeon_bo *rbo;
+
if (!radeon_ttm_bo_is_radeon_bo(bo))
return;
+
rbo = container_of(bo, struct radeon_bo, tbo);
radeon_bo_check_tiling(rbo, 0, 1);
radeon_vm_bo_invalidate(rbo->rdev, rbo);
+
+ /* update statistics */
+ if (!new_mem)
+ return;
+
+ radeon_update_memory_usage(rbo, bo->mem.mem_type, -1);
+ radeon_update_memory_usage(rbo, new_mem->mem_type, 1);
}
int radeon_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
projects / firefly-linux-kernel-4.4.55.git / blobdiff