drm/amdgpu/gfx9: implement wave VGPR reading

This is already hooked up to the "amdgpu_gpr" debugfs file used by
the umr userspace debugging tool.

Signed-off-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c

@@ -997,12 +997,22 @@ static void gfx_v9_0_read_wave_sgprs(struct amdgpu_device *adev, uint32_t simd,
 		start + SQIND_WAVE_SGPRS_OFFSET, size, dst);
 }
 
+static void gfx_v9_0_read_wave_vgprs(struct amdgpu_device *adev, uint32_t simd,
+				     uint32_t wave, uint32_t thread,
+				     uint32_t start, uint32_t size,
+				     uint32_t *dst)
+{
+	wave_read_regs(
+		adev, simd, wave, thread,
+		start + SQIND_WAVE_VGPRS_OFFSET, size, dst);
+}
 
 static const struct amdgpu_gfx_funcs gfx_v9_0_gfx_funcs = {
 	.get_gpu_clock_counter = &gfx_v9_0_get_gpu_clock_counter,
 	.select_se_sh = &gfx_v9_0_select_se_sh,
 	.read_wave_data = &gfx_v9_0_read_wave_data,
 	.read_wave_sgprs = &gfx_v9_0_read_wave_sgprs,
+	.read_wave_vgprs = &gfx_v9_0_read_wave_vgprs,
 };
 
 static void gfx_v9_0_gpu_early_init(struct amdgpu_device *adev)