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path: root/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
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Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c')
-rw-r--r--drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c38
1 files changed, 34 insertions, 4 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 80437b6ba5f3..832970cff64c 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -158,6 +158,7 @@ static void amdgpu_evict_flags(struct ttm_buffer_object *bo,
}
break;
case TTM_PL_TT:
+ case AMDGPU_PL_PREEMPT:
default:
amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_CPU);
break;
@@ -198,6 +199,7 @@ static int amdgpu_ttm_map_buffer(struct ttm_buffer_object *bo,
BUG_ON(adev->mman.buffer_funcs->copy_max_bytes <
AMDGPU_GTT_MAX_TRANSFER_SIZE * 8);
+ BUG_ON(mem->mem_type == AMDGPU_PL_PREEMPT);
/* Map only what can't be accessed directly */
if (!tmz && mem->start != AMDGPU_BO_INVALID_OFFSET) {
@@ -461,7 +463,8 @@ static int amdgpu_bo_move(struct ttm_buffer_object *bo, bool evict,
struct ttm_resource *old_mem = &bo->mem;
int r;
- if (new_mem->mem_type == TTM_PL_TT) {
+ if (new_mem->mem_type == TTM_PL_TT ||
+ new_mem->mem_type == AMDGPU_PL_PREEMPT) {
r = amdgpu_ttm_backend_bind(bo->bdev, bo->ttm, new_mem);
if (r)
return r;
@@ -479,11 +482,13 @@ static int amdgpu_bo_move(struct ttm_buffer_object *bo, bool evict,
goto out;
}
if (old_mem->mem_type == TTM_PL_SYSTEM &&
- new_mem->mem_type == TTM_PL_TT) {
+ (new_mem->mem_type == TTM_PL_TT ||
+ new_mem->mem_type == AMDGPU_PL_PREEMPT)) {
ttm_bo_move_null(bo, new_mem);
goto out;
}
- if (old_mem->mem_type == TTM_PL_TT &&
+ if ((old_mem->mem_type == TTM_PL_TT ||
+ old_mem->mem_type == AMDGPU_PL_PREEMPT) &&
new_mem->mem_type == TTM_PL_SYSTEM) {
r = ttm_bo_wait_ctx(bo, ctx);
if (r)
@@ -568,6 +573,7 @@ static int amdgpu_ttm_io_mem_reserve(struct ttm_device *bdev,
/* system memory */
return 0;
case TTM_PL_TT:
+ case AMDGPU_PL_PREEMPT:
break;
case TTM_PL_VRAM:
mem->bus.offset = mem->start << PAGE_SHIFT;
@@ -987,6 +993,7 @@ int amdgpu_ttm_alloc_gart(struct ttm_buffer_object *bo)
return r;
}
+ amdgpu_gart_invalidate_tlb(adev);
ttm_resource_free(bo, &bo->mem);
bo->mem = tmp;
}
@@ -1273,7 +1280,8 @@ uint64_t amdgpu_ttm_tt_pde_flags(struct ttm_tt *ttm, struct ttm_resource *mem)
if (mem && mem->mem_type != TTM_PL_SYSTEM)
flags |= AMDGPU_PTE_VALID;
- if (mem && mem->mem_type == TTM_PL_TT) {
+ if (mem && (mem->mem_type == TTM_PL_TT ||
+ mem->mem_type == AMDGPU_PL_PREEMPT)) {
flags |= AMDGPU_PTE_SYSTEM;
if (ttm->caching == ttm_cached)
@@ -1347,6 +1355,15 @@ static bool amdgpu_ttm_bo_eviction_valuable(struct ttm_buffer_object *bo,
}
switch (bo->mem.mem_type) {
+ case AMDGPU_PL_PREEMPT:
+ /* Preemptible BOs don't own system resources managed by the
+ * driver (pages, VRAM, GART space). They point to resources
+ * owned by someone else (e.g. pageable memory in user mode
+ * or a DMABuf). They are used in a preemptible context so we
+ * can guarantee no deadlocks and good QoS in case of MMU
+ * notifiers or DMABuf move notifiers from the resource owner.
+ */
+ return false;
case TTM_PL_TT:
if (amdgpu_bo_is_amdgpu_bo(bo) &&
amdgpu_bo_encrypted(ttm_to_amdgpu_bo(bo)))
@@ -1727,6 +1744,13 @@ int amdgpu_ttm_init(struct amdgpu_device *adev)
DRM_INFO("amdgpu: %uM of GTT memory ready.\n",
(unsigned)(gtt_size / (1024 * 1024)));
+ /* Initialize preemptible memory pool */
+ r = amdgpu_preempt_mgr_init(adev);
+ if (r) {
+ DRM_ERROR("Failed initializing PREEMPT heap.\n");
+ return r;
+ }
+
/* Initialize various on-chip memory pools */
r = amdgpu_ttm_init_on_chip(adev, AMDGPU_PL_GDS, adev->gds.gds_size);
if (r) {
@@ -1767,6 +1791,7 @@ void amdgpu_ttm_fini(struct amdgpu_device *adev)
amdgpu_vram_mgr_fini(adev);
amdgpu_gtt_mgr_fini(adev);
+ amdgpu_preempt_mgr_fini(adev);
ttm_range_man_fini(&adev->mman.bdev, AMDGPU_PL_GDS);
ttm_range_man_fini(&adev->mman.bdev, AMDGPU_PL_GWS);
ttm_range_man_fini(&adev->mman.bdev, AMDGPU_PL_OA);
@@ -1917,6 +1942,11 @@ int amdgpu_fill_buffer(struct amdgpu_bo *bo,
return -EINVAL;
}
+ if (bo->tbo.mem.mem_type == AMDGPU_PL_PREEMPT) {
+ DRM_ERROR("Trying to clear preemptible memory.\n");
+ return -EINVAL;
+ }
+
if (bo->tbo.mem.mem_type == TTM_PL_TT) {
r = amdgpu_ttm_alloc_gart(&bo->tbo);
if (r)