drm/amdgpu/gfx9: support the amdgpu.disable_cu option

This is ported from gfx8.

Signed-off-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
index 2e6f203fab9e..20345925d254 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
@@ -4416,6 +4416,20 @@ static void gfx_v9_0_set_gds_init(struct amdgpu_device *adev)
         }
 }
 
+static void gfx_v9_0_set_user_cu_inactive_bitmap(struct amdgpu_device *adev,
+                                                 u32 bitmap)
+{
+        u32 data;
+
+        if (!bitmap)
+                return;
+
+        data = bitmap << GC_USER_SHADER_ARRAY_CONFIG__INACTIVE_CUS__SHIFT;
+        data &= GC_USER_SHADER_ARRAY_CONFIG__INACTIVE_CUS_MASK;
+
+        WREG32_SOC15(GC, 0, mmGC_USER_SHADER_ARRAY_CONFIG, data);
+}
+
 static u32 gfx_v9_0_get_cu_active_bitmap(struct amdgpu_device *adev)
 {
         u32 data, mask;
@@ -4436,10 +4450,13 @@ static int gfx_v9_0_get_cu_info(struct amdgpu_device *adev,
 {
         int i, j, k, counter, active_cu_number = 0;
         u32 mask, bitmap, ao_bitmap, ao_cu_mask = 0;
+        unsigned disable_masks[4 * 2];
 
         if (!adev || !cu_info)
                 return -EINVAL;
 
+        amdgpu_gfx_parse_disable_cu(disable_masks, 4, 2);
+
         mutex_lock(&adev->grbm_idx_mutex);
         for (i = 0; i < adev->gfx.config.max_shader_engines; i++) {
                 for (j = 0; j < adev->gfx.config.max_sh_per_se; j++) {
@@ -4447,6 +4464,9 @@ static int gfx_v9_0_get_cu_info(struct amdgpu_device *adev,
                         ao_bitmap = 0;
                         counter = 0;
                         gfx_v9_0_select_se_sh(adev, i, j, 0xffffffff);
+                        if (i < 4 && j < 2)
+                                gfx_v9_0_set_user_cu_inactive_bitmap(
+                                        adev, disable_masks[i * 2 + j]);
                         bitmap = gfx_v9_0_get_cu_active_bitmap(adev);
                         cu_info->bitmap[i][j] = bitmap;