diff options
| author | pding <Pixel.Ding@amd.com> | 2017-10-24 05:01:13 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2017-12-05 00:33:13 +0300 |
| commit | a16f8f11c599cdec16e77020d56d230fedabe922 (patch) | |
| tree | b0a48a1f5025351549fcaee4a5363131d99c82c8 /drivers | |
| parent | 1366b2d01654d2028cba64109ad1bffb8afbef73 (diff) | |
| download | linux-a16f8f11c599cdec16e77020d56d230fedabe922.tar.xz | |
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: pding <Pixel.Ding@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c | 8 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h | 1 |
2 files changed, 9 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c index 6738df836a70..0f227cf7a67c 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c @@ -24,6 +24,14 @@ #include "amdgpu.h" #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 r; diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h index b89d37fc406f..81efb9d291c4 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); |