Commit a16f8f11 authored by pding's avatar pding Committed by Alex Deucher

drm/amdgpu/virt: add function to check MMIO (v2)

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.

v2:
 - add comments inline
Signed-off-by: default avatarpding <Pixel.Ding@amd.com>
Acked-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 1366b2d0
...@@ -24,6 +24,14 @@ ...@@ -24,6 +24,14 @@
#include "amdgpu.h" #include "amdgpu.h"
#define MAX_KIQ_REG_WAIT 100000000 /* in usecs */ #define MAX_KIQ_REG_WAIT 100000000 /* in usecs */
bool amdgpu_virt_mmio_blocked(struct amdgpu_device *adev)
{
/* By now all MMIO pages except mailbox are blocked */
/* if blocking is enabled in hypervisor. Choose the */
/* SCRATCH_REG0 to test. */
return RREG32_NO_KIQ(0xc040) == 0xffffffff;
}
int amdgpu_allocate_static_csa(struct amdgpu_device *adev) int amdgpu_allocate_static_csa(struct amdgpu_device *adev)
{ {
int r; int r;
......
...@@ -276,6 +276,7 @@ static inline bool is_virtual_machine(void) ...@@ -276,6 +276,7 @@ static inline bool is_virtual_machine(void)
} }
struct amdgpu_vm; struct amdgpu_vm;
bool amdgpu_virt_mmio_blocked(struct amdgpu_device *adev);
int amdgpu_allocate_static_csa(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, int amdgpu_map_static_csa(struct amdgpu_device *adev, struct amdgpu_vm *vm,
struct amdgpu_bo_va **bo_va); struct amdgpu_bo_va **bo_va);
......
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