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>

2 files changed, 20 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;
diff --git a/include/uapi/drm/radeon_drm.h b/include/uapi/drm/radeon_drm.h
index 0c8a62c543f7..5645a878faec 100644
--- a/include/uapi/drm/radeon_drm.h
+++ b/include/uapi/drm/radeon_drm.h
@@ -967,6 +967,10 @@ struct drm_radeon_cs {
 #define RADEON_INFO_MAX_PIPES           0x10
 /* timestamp for GL_ARB_timer_query (OpenGL), returns the current GPU clock */
 #define RADEON_INFO_TIMESTAMP           0x11
+/* max shader engines (SE) - needed for geometry shaders, etc. */
+#define RADEON_INFO_MAX_SE              0x12
+/* max SH per SE */
+#define RADEON_INFO_MAX_SH_PER_SE       0x13
 
 struct drm_radeon_info {
         uint32_t                request;