From: pding <[email protected]> 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 <[email protected]> --- 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 _______________________________________________ amd-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/amd-gfx
