[PATCH] drm/amdgpu/psp: keep TMR in visible vram region for SRIOV

[Yin, Tianci (Rico)]

Hi Christian,

I have just realized the stolen_vga_memory problem,
I have ever thought that no one really use the stolen_vga_memory BO in KMD code, so it should be safe.

It seems we have to add a new parameter for amdgpu_bo_create_kernel() to pass the prefer region.

Thanks!

Rico
________________________________
From: Christian K?nig <ckoenig.leichtzumerken at gmail.com>
Sent: Wednesday, August 28, 2019 17:57
To: Yin, Tianci (Rico) <Tianci.Yin at amd.com>; amd-gfx at lists.freedesktop.org <amd-gfx at lists.freedesktop.org>
Cc: Xu, Feifei <Feifei.Xu at amd.com>; Ma, Le <Le.Ma at amd.com>; Xiao, Jack <Jack.Xiao at amd.com>; Zhang, Hawking <Hawking.Zhang at amd.com>
Subject: Re: [PATCH] drm/amdgpu/psp: keep TMR in visible vram region for SRIOV

Am 28.08.19 um 11:25 schrieb Tianci Yin:
> From: "Tianci.Yin" <tianci.yin at amd.com>
>
> Fix compute ring test failure in sriov scenario.
>
> Signed-off-by: Tianci.Yin <tianci.yin at amd.com>
> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c | 14 ++++++++++----
>   drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h |  1 +
>   2 files changed, 11 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
> index 9f7cc5b..92c68c9 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
> @@ -261,9 +261,15 @@ static int psp_tmr_init(struct psp_context *psp)
>                }
>        }
>
> -     ret = amdgpu_bo_create_kernel(psp->adev, tmr_size, PSP_TMR_SIZE,
> -                                   AMDGPU_GEM_DOMAIN_VRAM,
> -                                   &psp->tmr_bo, &psp->tmr_mc_addr, NULL);
> +     psp->tmr_buf = NULL;
> +     if (!amdgpu_sriov_vf(psp->adev))
> +             ret = amdgpu_bo_create_kernel(psp->adev, tmr_size, PSP_TMR_SIZE,
> +                                           AMDGPU_GEM_DOMAIN_VRAM,
> +                                           &psp->tmr_bo, &psp->tmr_mc_addr, NULL);
> +     else
> +             ret = amdgpu_bo_create_kernel(psp->adev, tmr_size, PSP_TMR_SIZE,
> +                                           AMDGPU_GEM_DOMAIN_VRAM,
> +                                           &psp->tmr_bo, &psp->tmr_mc_addr, &psp->tmr_buf);

Might be better to use a local variable for the CPU pointer instead of
duplicating the calling parameters.

BTW: How did you solved the stolen_vga_memory problem I pointed out in
the original patch set?

Christian.

>
>        return ret;
>   }
> @@ -1216,7 +1222,7 @@ static int psp_hw_fini(void *handle)
>
>        psp_ring_destroy(psp, PSP_RING_TYPE__KM);
>
> -     amdgpu_bo_free_kernel(&psp->tmr_bo, &psp->tmr_mc_addr, NULL);
> +     amdgpu_bo_free_kernel(&psp->tmr_bo, &psp->tmr_mc_addr, &psp->tmr_buf);
>        amdgpu_bo_free_kernel(&psp->fw_pri_bo,
>                              &psp->fw_pri_mc_addr, &psp->fw_pri_buf);
>        amdgpu_bo_free_kernel(&psp->fence_buf_bo,
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h
> index bc0947f..b73d4aa 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h
> @@ -171,6 +171,7 @@ struct psp_context
>        /* tmr buffer */
>        struct amdgpu_bo                *tmr_bo;
>        uint64_t                        tmr_mc_addr;
> +     void                            *tmr_buf;
>
>        /* asd firmware and buffer */
>        const struct firmware           *asd_fw;

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