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Commit 57ad33a3 authored by Alex Deucher's avatar Alex Deucher
Browse files

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: 048765ad (amdgpu: fix asic initialization for virtualized environments (v2))
Reviewed-by: default avatarXiangliang Yu <Xiangliang.Yu@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
parent ea478d01

drivers/gpu/drm/amd/amdgpu/vi.c

+13 −8
Original line number Diff line number Diff line
@@ -449,7 +449,11 @@ 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);

	uint32_t reg = 0;



	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)
@@ -457,6 +461,7 @@ static void vi_detect_hw_virtualization(struct amdgpu_device *adev) 


	       if (reg & 0x80000000)

		       adev->virt.caps |= AMDGPU_SRIOV_CAPS_ENABLE_IOV;

	}



	if (reg == 0) {

		if (is_virtual_machine()) /* passthrough mode exclus sr-iov mode */