diff options
| author | pding <Pixel.Ding@amd.com> | 2017-10-24 10:01:13 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2017-12-04 16:33:13 -0500 |
| commit | a16f8f11c599cdec16e77020d56d230fedabe922 (patch) | |
| tree | b0a48a1f5025351549fcaee4a5363131d99c82c8 /drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c | |
| parent | 1366b2d01654d2028cba64109ad1bffb8afbef73 (diff) | |
| download | op-kernel-dev-a16f8f11c599cdec16e77020d56d230fedabe922.zip op-kernel-dev-a16f8f11c599cdec16e77020d56d230fedabe922.tar.gz | |
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/gpu/drm/amd/amdgpu/amdgpu_virt.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c index 6738df8..0f227cf 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; |
