drm/radeon: add new INFO ioctl requests

Add requests to get the number of shader engines (SE) and
the number of SH per SE.  These are needed for geometry
and tesselation shaders in the 3D driver as well as setting
up PA_SC_RASTER_CONFIG on SI asics.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c
index dc781c49b96b..9c312f9afb68 100644
--- a/drivers/gpu/drm/radeon/radeon_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_kms.c
@@ -361,6 +361,22 @@ int radeon_info_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
                         return -EINVAL;
                 }
                 break;
+        case RADEON_INFO_MAX_SE:
+                if (rdev->family >= CHIP_TAHITI)
+                        value = rdev->config.si.max_shader_engines;
+                else if (rdev->family >= CHIP_CAYMAN)
+                        value = rdev->config.cayman.max_shader_engines;
+                else if (rdev->family >= CHIP_CEDAR)
+                        value = rdev->config.evergreen.num_ses;
+                else
+                        value = 1;
+                break;
+        case RADEON_INFO_MAX_SH_PER_SE:
+                if (rdev->family >= CHIP_TAHITI)
+                        value = rdev->config.si.max_sh_per_se;
+                else
+                        return -EINVAL;
+                break;
         default:
                 DRM_DEBUG_KMS("Invalid request %d\n", info->request);
                 return -EINVAL;