[PATCH 1/2] drm/amdgpu: only check mmBIF_IOV_FUNC_IDENTIFIER on tonga/fiji

[Yu, Xiangliang]

Reviewed-by: Xiangliang Yu <Xiangliang.Yu at amd.com>


> -----Original Message-----
> From: amd-gfx [mailto:amd-gfx-bounces at lists.freedesktop.org] On Behalf
> Of Alex Deucher
> Sent: Tuesday, December 19, 2017 11:07 PM
> To: amd-gfx at lists.freedesktop.org
> Cc: Deucher, Alexander <Alexander.Deucher at amd.com>
> Subject: [PATCH 1/2] 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.
> 
> Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
> ---
>  drivers/gpu/drm/amd/amdgpu/vi.c | 21 +++++++++++++--------
>  1 file changed, 13 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/vi.c
> b/drivers/gpu/drm/amd/amdgpu/vi.c index d9bb26322850..c59b37365e4d
> 100644
> --- a/drivers/gpu/drm/amd/amdgpu/vi.c
> +++ b/drivers/gpu/drm/amd/amdgpu/vi.c
> @@ -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;
> -
> -	if (reg & 0x80000000)
> -		adev->virt.caps |= AMDGPU_SRIOV_CAPS_ENABLE_IOV;
> +	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)
> +		       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 */
> --
> 2.13.6
> 
> _______________________________________________
> amd-gfx mailing list
> amd-gfx at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/amd-gfx