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drm/amdgpu: only check mmBIF_IOV_FUNC_IDENTIFIER on tonga/fiji 

We only support SR-IOV on tonga/fiji.  Don't check this register
on other VI parts.

Fixes: 048765ad5a (amdgpu: fix asic initialization for virtualized environments (v2))
Reviewed-by: Xiangliang Yu <Xiangliang.Yu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Alex Deucher 2017-12-19 09:52:31 -05:00
parent ea478d01ed
commit 57ad33a307
1 changed files with 12 additions and 7 deletions
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19
drivers/gpu/drm/amd/amdgpu/vi.c
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@ -449,14 +449,19 @@ static bool vi_read_bios_from_rom(struct amdgpu_device *adev,
static void vi_detect_hw_virtualization(struct amdgpu_device *adev)
{
uint32_t reg = RREG32(mmBIF_IOV_FUNC_IDENTIFIER);
/* bit0: 0 means pf and 1 means vf */
/* bit31: 0 means disable IOV and 1 means enable */
if (reg & 1)
adev->virt.caps |= AMDGPU_SRIOV_CAPS_IS_VF;
uint32_t reg = 0;
if (reg & 0x80000000)
adev->virt.caps |= AMDGPU_SRIOV_CAPS_ENABLE_IOV;
if (adev->asic_type == CHIP_TONGA ||
adev->asic_type == CHIP_FIJI) {
reg = RREG32(mmBIF_IOV_FUNC_IDENTIFIER);
/* bit0: 0 means pf and 1 means vf */
/* bit31: 0 means disable IOV and 1 means enable */
if (reg & 1)
adev->virt.caps |= AMDGPU_SRIOV_CAPS_IS_VF;
if (reg & 0x80000000)
adev->virt.caps |= AMDGPU_SRIOV_CAPS_ENABLE_IOV;
}
if (reg == 0) {
if (is_virtual_machine()) /* passthrough mode exclus sr-iov mode */