drm/amdgpu: add check for atombios GPU virtualization table

This table is found on boards that support SR-IOV.  This will
be used to determine if the board supports SR-IOV and allow
the driver to take specific action in certain cases.

Reviewed-by: Monk Liu <monk.liu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
index 9416e0f5c1db..84b0ce39ee14 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
@@ -1514,6 +1514,19 @@ int amdgpu_atombios_init_mc_reg_table(struct amdgpu_device *adev,
         return -EINVAL;
 }
 
+bool amdgpu_atombios_has_gpu_virtualization_table(struct amdgpu_device *adev)
+{
+        int index = GetIndexIntoMasterTable(DATA, GPUVirtualizationInfo);
+        u8 frev, crev;
+        u16 data_offset, size;
+
+        if (amdgpu_atom_parse_data_header(adev->mode_info.atom_context, index, &size,
+                                          &frev, &crev, &data_offset))
+                return true;
+
+        return false;
+}
+
 void amdgpu_atombios_scratch_regs_lock(struct amdgpu_device *adev, bool lock)
 {
         uint32_t bios_6_scratch;