drm/amdgpu/gfx10: require to pin/unpin CSIB BO when suspend/resume

CSIB BO is required to be pinned down to guarantee
bo is always valid when resume, and to be unpinned it
so that its content can be saved during suspend.

Signed-off-by: Jack Xiao <Jack.Xiao@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
index b7b761f7e34e9357768ad609f9061b8893a11532..1e67bf1f585d2bbf111a3576cd43a6d3161ca453 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
@@ -813,6 +813,39 @@ static int gfx_v10_0_rlc_init(struct amdgpu_device *adev)
        return 0;
 }
 
+static int gfx_v10_0_csb_vram_pin(struct amdgpu_device *adev)
+{
+       int r;
+
+       r = amdgpu_bo_reserve(adev->gfx.rlc.clear_state_obj, false);
+       if (unlikely(r != 0))
+               return r;
+
+       r = amdgpu_bo_pin(adev->gfx.rlc.clear_state_obj,
+                       AMDGPU_GEM_DOMAIN_VRAM);
+       if (!r)
+               adev->gfx.rlc.clear_state_gpu_addr =
+                       amdgpu_bo_gpu_offset(adev->gfx.rlc.clear_state_obj);
+
+       amdgpu_bo_unreserve(adev->gfx.rlc.clear_state_obj);
+
+       return r;
+}
+
+static void gfx_v10_0_csb_vram_unpin(struct amdgpu_device *adev)
+{
+       int r;
+
+       if (!adev->gfx.rlc.clear_state_obj)
+               return;
+
+       r = amdgpu_bo_reserve(adev->gfx.rlc.clear_state_obj, true);
+       if (likely(r == 0)) {
+               amdgpu_bo_unpin(adev->gfx.rlc.clear_state_obj);
+               amdgpu_bo_unreserve(adev->gfx.rlc.clear_state_obj);
+       }
+}
+
 static void gfx_v10_0_mec_fini(struct amdgpu_device *adev)
 {
        amdgpu_bo_free_kernel(&adev->gfx.mec.hpd_eop_obj, NULL, NULL);
@@ -3494,6 +3527,10 @@ static int gfx_v10_0_hw_init(void *handle)
        int r;
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
+       r = gfx_v10_0_csb_vram_pin(adev);
+       if (r)
+               return r;
+
        if (!amdgpu_emu_mode)
                gfx_v10_0_init_golden_registers(adev);
 
@@ -3581,6 +3618,7 @@ static int gfx_v10_0_hw_fini(void *handle)
        }
        gfx_v10_0_cp_enable(adev, false);
        gfx_v10_0_enable_gui_idle_interrupt(adev, false);
+       gfx_v10_0_csb_vram_unpin(adev);
 
        return 0;
 }