drm/amdgpu: add flag to delay VM updates

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
index c3ea363..975edb1 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
@@ -525,8 +525,8 @@ int amdgpu_gem_va_ioctl(struct drm_device *dev, void *data,
                return -EINVAL;
        }
 
-       invalid_flags = ~(AMDGPU_VM_PAGE_READABLE | AMDGPU_VM_PAGE_WRITEABLE |
-                       AMDGPU_VM_PAGE_EXECUTABLE);
+       invalid_flags = ~(AMDGPU_VM_DELAY_UPDATE | AMDGPU_VM_PAGE_READABLE |
+                       AMDGPU_VM_PAGE_WRITEABLE | AMDGPU_VM_PAGE_EXECUTABLE);
        if ((args->flags & invalid_flags)) {
                dev_err(&dev->pdev->dev, "invalid flags 0x%08X vs 0x%08X\n",
                        args->flags, invalid_flags);
@@ -579,7 +579,7 @@ int amdgpu_gem_va_ioctl(struct drm_device *dev, void *data,
                break;
        }
 
-       if (!r)
+       if (!r && !(args->flags & AMDGPU_VM_DELAY_UPDATE))
                amdgpu_gem_va_update_vm(adev, bo_va);
 
        drm_gem_object_unreference_unlocked(gobj);

diff --git a/include/uapi/drm/amdgpu_drm.h b/include/uapi/drm/amdgpu_drm.h
index 8edf104..b6fce90 100644 (file)
--- a/include/uapi/drm/amdgpu_drm.h
+++ b/include/uapi/drm/amdgpu_drm.h
@@ -313,6 +313,9 @@ struct drm_amdgpu_gem_op {
 #define AMDGPU_VA_OP_MAP                       1
 #define AMDGPU_VA_OP_UNMAP                     2
 
+/* Delay the page table update till the next CS */
+#define AMDGPU_VM_DELAY_UPDATE         (1 << 0)
+
 /* Mapping flags */
 /* readable mapping */
 #define AMDGPU_VM_PAGE_READABLE                (1 << 1)