diff options
| author | Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com> | 2025-05-12 06:54:55 -0700 |
|---|---|---|
| committer | Matthew Brost <matthew.brost@intel.com> | 2025-05-12 13:48:48 -0700 |
| commit | 8a9b978ebd47df9e0694c34748c2d6fa0c31eb4d (patch) | |
| tree | b27cc98c459e1f5fa3338c041eeea51798317e50 /drivers/gpu/drm/drm_gpusvm.c | |
| parent | e5c13e2c505b73a8667ef9a0fd5cbd4227e483e6 (diff) | |
drm/gpusvm: Introduce devmem_only flag for allocation
This commit adds a new flag, devmem_only, to the drm_gpusvm structure. The
purpose of this flag is to ensure that the get_pages function allocates
memory exclusively from the device's memory. If the allocation from
device memory fails, the function will return an -EFAULT error.
Required for shared CPU and GPU atomics on certain devices.
v3:
- s/vram_only/devmem_only/
Fixes: 99624bdff867 ("drm/gpusvm: Add support for GPU Shared Virtual Memory")
Cc: stable@vger.kernel.org
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Link: https://lore.kernel.org/r/20250512135500.1405019-2-matthew.brost@intel.com
Diffstat (limited to 'drivers/gpu/drm/drm_gpusvm.c')
| -rw-r--r-- | drivers/gpu/drm/drm_gpusvm.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_gpusvm.c b/drivers/gpu/drm/drm_gpusvm.c index de424e670995..a58d03e6cac2 100644 --- a/drivers/gpu/drm/drm_gpusvm.c +++ b/drivers/gpu/drm/drm_gpusvm.c @@ -1454,6 +1454,11 @@ map_pages: goto err_unmap; } + if (ctx->devmem_only) { + err = -EFAULT; + goto err_unmap; + } + addr = dma_map_page(gpusvm->drm->dev, page, 0, PAGE_SIZE << order, |