drm/radeon/kms: add info query for max pipes
The maximum number of pipes is needed by the user space compute
driver to calculate the number of wavefronts per thread group.
Signed-off-by: Tom Stellard <thomas.stellard@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c
index 1986eba..72d70eb 100644
--- a/drivers/gpu/drm/radeon/radeon_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_kms.c
@@ -264,6 +264,19 @@
return -EINVAL;
value = RADEON_IB_VM_MAX_SIZE;
break;
+ case RADEON_INFO_MAX_PIPES:
+ if (rdev->family >= CHIP_CAYMAN)
+ value = rdev->config.cayman.max_pipes_per_simd;
+ else if (rdev->family >= CHIP_CEDAR)
+ value = rdev->config.evergreen.max_pipes;
+ else if (rdev->family >= CHIP_RV770)
+ value = rdev->config.rv770.max_pipes;
+ else if (rdev->family >= CHIP_R600)
+ value = rdev->config.r600.max_pipes;
+ else {
+ return -EINVAL;
+ }
+ break;
default:
DRM_DEBUG_KMS("Invalid request %d\n", info->request);
return -EINVAL;