Re: [PATCH] drm/amdgpu: Use MEC FW with SJT on gfx_v9_4_3

["Lazar, Lijo" <lijo.lazar@amd.com>]

On 12/6/2024 4:15 AM, Yuan Feng wrote:
> On SRIOV, guest driver and host driver might deploy different versions of MEC firmware binaries that
> lead to potential compability issues cause system hang. To solve this, host and guest deploy MEC fw copies
> with two level jump table.
> 
> Signed-off-by: Yuan Feng <yfeng1@amd.com>
> ---
>  drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c | 12 +++++++++++-
>  1 file changed, 11 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c
> index 03654bfda58a..f248449e93a7 100644
> --- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c
> +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c
> @@ -45,6 +45,7 @@ MODULE_FIRMWARE("amdgpu/gc_9_4_3_mec.bin");
>  MODULE_FIRMWARE("amdgpu/gc_9_4_4_mec.bin");
>  MODULE_FIRMWARE("amdgpu/gc_9_4_3_rlc.bin");
>  MODULE_FIRMWARE("amdgpu/gc_9_4_4_rlc.bin");
> +MODULE_FIRMWARE("amdgpu/gc_9_4_3_sjt_mec.bin");
>  

This change needs to be done on top of
https://patchwork.freedesktop.org/patch/626097/ as that one adds support
for GFX 9.4.4 also.

Thanks,
Lijo

>  #define GFX9_MEC_HPD_SIZE 4096
>  #define RLCG_UCODE_LOADING_START_ADDRESS 0x00002000L
> @@ -574,7 +575,16 @@ static int gfx_v9_4_3_init_cp_compute_microcode(struct amdgpu_device *adev,
>  {
>  	int err;
>  
> -	err = amdgpu_ucode_request(adev, &adev->gfx.mec_fw,
> +	if (amdgpu_sriov_vf(adev)) {
> +		err = amdgpu_ucode_request(adev, &adev->gfx.mec_fw,
> +				   "amdgpu/%s_sjt_mec.bin", chip_name);
> +
> +		if (err)
> +			err = amdgpu_ucode_request(adev, &adev->gfx.mec_fw,
> +				   		"amdgpu/%s_mec.bin", chip_name);
> +	}
> +	else
> +		err = amdgpu_ucode_request(adev, &adev->gfx.mec_fw,
>  				   "amdgpu/%s_mec.bin", chip_name);
>  	if (err)
>  		goto out;