From: pding <Pixel.Ding@xxxxxxx>
MMIO space can be blocked on virtualised device. Add this function
to check if MMIO is blocked or not.
Todo: need a reliable method such like communation with hypervisor.
Signed-off-by: pding <Pixel.Ding at amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c | 5 +++++
drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h | 1 +
2 files changed, 6 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
index e97f80f..33dac7e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
@@ -24,6 +24,11 @@
#include "amdgpu.h"
#define MAX_KIQ_REG_WAIT 100000000 /* in usecs */
+bool amdgpu_virt_mmio_blocked(struct amdgpu_device *adev)
+{
+ return RREG32_NO_KIQ(0xc040) == 0xffffffff;
+}
+
int amdgpu_allocate_static_csa(struct amdgpu_device *adev)
{
int r;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
index b89d37f..81efb9d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
@@ -276,6 +276,7 @@ static inline bool is_virtual_machine(void)
}
struct amdgpu_vm;
+bool amdgpu_virt_mmio_blocked(struct amdgpu_device *adev);
int amdgpu_allocate_static_csa(struct amdgpu_device *adev);
int amdgpu_map_static_csa(struct amdgpu_device *adev, struct amdgpu_vm *vm,
struct amdgpu_bo_va **bo_va);
--
2.9.5
