[PATCH] drm/amdgpu: Enable chained IB MCBP support

[Yu, Xiangliang]

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


Thanks!
Xiangliang Yu

> -----Original Message-----
> From: Trigger Huang [mailto:trigger.huang at amd.com]
> Sent: Thursday, April 27, 2017 3:18 PM
> To: amd-gfx at lists.freedesktop.org
> Cc: Liu, Monk <Monk.Liu at amd.com>; Yu, Xiangliang
> <Xiangliang.Yu at amd.com>; Huang, Trigger <Trigger.Huang at amd.com>
> Subject: [PATCH] drm/amdgpu: Enable chained IB MCBP support
> 
> Support for MCBP/Virtualization in combination with chained IBs is formal
> released on firmware feature version #46. So enable it according to firmware
> feature version, otherwise, world switch will hang.
> 
> Signed-off-by: Trigger Huang <trigger.huang at amd.com>
> ---
>  drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c | 17 +++++++++++------
>  1 file changed, 11 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
> b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
> index 2ff5f19..9a8c042 100644
> --- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
> @@ -941,12 +941,6 @@ static int gfx_v8_0_init_microcode(struct
> amdgpu_device *adev)
>  	cp_hdr = (const struct gfx_firmware_header_v1_0 *)adev-
> >gfx.me_fw->data;
>  	adev->gfx.me_fw_version = le32_to_cpu(cp_hdr-
> >header.ucode_version);
> 
> -	/* chain ib ucode isn't formal released, just disable it by far
> -	 * TODO: when ucod ready we should use ucode version to judge if
> -	 * chain-ib support or not.
> -	 */
> -	adev->virt.chained_ib_support = false;
> -
>  	adev->gfx.me_feature_version = le32_to_cpu(cp_hdr-
> >ucode_feature_version);
> 
>  	snprintf(fw_name, sizeof(fw_name), "amdgpu/%s_ce.bin",
> chip_name); @@ -960,6 +954,17 @@ static int
> gfx_v8_0_init_microcode(struct amdgpu_device *adev)
>  	adev->gfx.ce_fw_version = le32_to_cpu(cp_hdr-
> >header.ucode_version);
>  	adev->gfx.ce_feature_version = le32_to_cpu(cp_hdr-
> >ucode_feature_version);
> 
> +	/*
> +	 * Support for MCBP/Virtualization in combination with chained IBs is
> +	 * formal released on feature version #46
> +	 */
> +	if (adev->gfx.ce_feature_version >= 46 &&
> +	    adev->gfx.pfp_feature_version >= 46) {
> +		adev->virt.chained_ib_support = true;
> +		DRM_INFO("Chained IB support enabled!\n");
> +	} else
> +		adev->virt.chained_ib_support = false;
> +
>  	snprintf(fw_name, sizeof(fw_name), "amdgpu/%s_rlc.bin",
> chip_name);
>  	err = request_firmware(&adev->gfx.rlc_fw, fw_name, adev->dev);
>  	if (err)
> --
> 2.7.4