Add a AMDGPU_GEM_CREATE_DISCARDABLE flag to note that the content of a BO
doesn't needs to be preserved during eviction.
KFD was already using a similar functionality for SVM BOs so replace the
internal flag with the new UAPI.
Only compile tested!
Signed-off-by: Christian König <christian.koenig@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 4 ++--
drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 1 +
drivers/gpu/drm/amd/amdgpu/amdgpu_object.h | 1 -
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 2 +-
drivers/gpu/drm/amd/amdkfd/kfd_svm.c | 2 +-
include/uapi/drm/amdgpu_drm.h | 4 ++++
6 files changed, 9 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
index 2e16484bf606..bf97d8f07f57 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
@@ -302,8 +302,8 @@ int amdgpu_gem_create_ioctl(struct drm_device *dev, void *data,
AMDGPU_GEM_CREATE_VRAM_CLEARED |
AMDGPU_GEM_CREATE_VM_ALWAYS_VALID |
AMDGPU_GEM_CREATE_EXPLICIT_SYNC |
- AMDGPU_GEM_CREATE_ENCRYPTED))
-
+ AMDGPU_GEM_CREATE_ENCRYPTED |
+ AMDGPU_GEM_CREATE_DISCARDABLE))
return -EINVAL;
/* reject invalid gem domains */
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 8b7ee1142d9a..1944ef37a61e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -567,6 +567,7 @@ int amdgpu_bo_create(struct amdgpu_device *adev,
bp->domain;
bo->allowed_domains = bo->preferred_domains;
if (bp->type != ttm_bo_type_kernel &&
+ !(bp->flags & AMDGPU_GEM_CREATE_DISCARDABLE) &&
bo->allowed_domains == AMDGPU_GEM_DOMAIN_VRAM)
bo->allowed_domains |= AMDGPU_GEM_DOMAIN_GTT;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
index 4c9cbdc66995..147b79c10cbb 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
@@ -41,7 +41,6 @@
/* BO flag to indicate a KFD userptr BO */
#define AMDGPU_AMDKFD_CREATE_USERPTR_BO (1ULL << 63)
-#define AMDGPU_AMDKFD_CREATE_SVM_BO (1ULL << 62)
#define to_amdgpu_bo_user(abo) container_of((abo), struct amdgpu_bo_user, bo)
#define to_amdgpu_bo_vm(abo) container_of((abo), struct amdgpu_bo_vm, bo)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 41d6f604813d..ba3221a25e75 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -117,7 +117,7 @@ static void amdgpu_evict_flags(struct ttm_buffer_object *bo,
}
abo = ttm_to_amdgpu_bo(bo);
- if (abo->flags & AMDGPU_AMDKFD_CREATE_SVM_BO) {
+ if (abo->flags & AMDGPU_GEM_CREATE_DISCARDABLE) {
placement->num_placement = 0;
placement->num_busy_placement = 0;
return;
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
index 5ed8d9b549a4..835b5187f0b8 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
@@ -531,7 +531,7 @@ svm_range_vram_node_new(struct amdgpu_device *adev, struct svm_range *prange,
bp.domain = AMDGPU_GEM_DOMAIN_VRAM;
bp.flags = AMDGPU_GEM_CREATE_NO_CPU_ACCESS;
bp.flags |= clear ? AMDGPU_GEM_CREATE_VRAM_CLEARED : 0;
- bp.flags |= AMDGPU_AMDKFD_CREATE_SVM_BO;
+ bp.flags |= AMDGPU_GEM_CREATE_DISCARDABLE;
bp.type = ttm_bo_type_device;
bp.resv = NULL;
diff --git a/include/uapi/drm/amdgpu_drm.h b/include/uapi/drm/amdgpu_drm.h
index 9a1d210d135d..57b9d8f0133a 100644
--- a/include/uapi/drm/amdgpu_drm.h
+++ b/include/uapi/drm/amdgpu_drm.h
@@ -140,6 +140,10 @@ extern "C" {
* not require GTT memory accounting
*/
#define AMDGPU_GEM_CREATE_PREEMPTIBLE (1 << 11)
+/* Flag that BO can be discarded under memory pressure without keeping the
+ * content.
+ */
+#define AMDGPU_GEM_CREATE_DISCARDABLE (1 << 12)
struct drm_amdgpu_gem_create_in {
/** the requested memory size */
--
2.25.1
