Re: [PATCH 1/4] drm/ttm: add TTM_PL_FLAG_TEMPORARY flag v3

[Christian König <ckoenig.leichtzumerken@xxxxxxxxx>]

    Hi Nirmoy,
    
    can you give that patch set a testing round and an review?
    
    The memory stress test with low VRAM on APUs should be sufficient
    and you should have that setup still around.
    
    Thanks in advance,
    Christian.

Am 07.06.21 um 14:58 schrieb Yu, Lang:

[AMD Official Use Only]

Thanks，please let Nirmoy do it.

Regards，

Lang

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---

发件人: Christian König <ckoenig.leichtzumerken@xxxxxxxxx>
发送时间: Monday, June 7, 2021 8:41:49 PM
收件人: Thomas Hellström (Intel) <thomas_os@xxxxxxxxxxxx>; Yu, Lang <Lang.Yu@xxxxxxx>
抄送: dri-devel@xxxxxxxxxxxxxxxxxxxxx <dri-devel@xxxxxxxxxxxxxxxxxxxxx>
主题: Re: [PATCH 1/4] drm/ttm: add TTM_PL_FLAG_TEMPORARY flag v3

 

Thanks!

Lang can anybody from your team give as an reviewed-by/test-by on the
amdgpu patches? I just want another pair of eyes looking over it.

If nobody else has time I will ask Nirmoy for a quick testing round.

Thanks,
Christian.

Am 07.06.21 um 14:38 schrieb Thomas Hellström (Intel):
> Sure. LGTM,
>
> Reviewed-by: Thomas Hellström <thomas.hellstrom@xxxxxxxxxxxxxxx>
>
>
> On 6/7/21 2:36 PM, Christian König wrote:
>> Thomas any comments on this?
>>
>> Is the purpose of this now clear enough?
>>
>> Thanks,
>> Christian.
>>
>> Am 01.06.21 um 14:25 schrieb Christian König:
>>> From: Lang Yu <Lang.Yu@xxxxxxx>
>>>
>>> Sometimes drivers need to use bounce buffers to evict BOs. While
>>> those reside
>>> in some domain they are not necessarily suitable for CS.
>>>
>>> Add a flag so that drivers can note that a bounce buffers needs to be
>>> reallocated during validation.
>>>
>>> v2: add detailed comments
>>> v3 (chk): merge commits and rework commit message
>>>
>>> Suggested-by: Christian König <christian.koenig@xxxxxxx>
>>> Signed-off-by: Lang Yu <Lang.Yu@xxxxxxx>
>>> Signed-off-by: Christian König <christian.koenig@xxxxxxx>
>>> ---
>>>   drivers/gpu/drm/ttm/ttm_bo.c    | 3 +++
>>>   include/drm/ttm/ttm_placement.h | 7 +++++--
>>>   2 files changed, 8 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/drivers/gpu/drm/ttm/ttm_bo.c
>>> b/drivers/gpu/drm/ttm/ttm_bo.c
>>> index 51a94fd63bd7..6b393502198e 100644
>>> --- a/drivers/gpu/drm/ttm/ttm_bo.c
>>> +++ b/drivers/gpu/drm/ttm/ttm_bo.c
>>> @@ -929,6 +929,9 @@ static bool ttm_bo_places_compat(const struct
>>> ttm_place *places,
>>>   {
>>>       unsigned i;
>>>   +    if (mem->placement & TTM_PL_FLAG_TEMPORARY)
>>> +        return false;
>>> +
>>>       for (i = 0; i < num_placement; i++) {
>>>           const struct ttm_place *heap = &places[i];
>>>   diff --git a/include/drm/ttm/ttm_placement.h
>>> b/include/drm/ttm/ttm_placement.h
>>> index aa6ba4d0cf78..8995c9e4ec1b 100644
>>> --- a/include/drm/ttm/ttm_placement.h
>>> +++ b/include/drm/ttm/ttm_placement.h
>>> @@ -47,8 +47,11 @@
>>>    * top of the memory area, instead of the bottom.
>>>    */
>>>   -#define TTM_PL_FLAG_CONTIGUOUS  (1 << 19)
>>> -#define TTM_PL_FLAG_TOPDOWN     (1 << 22)
>>> +#define TTM_PL_FLAG_CONTIGUOUS  (1 << 0)
>>> +#define TTM_PL_FLAG_TOPDOWN     (1 << 1)
>>> +
>>> +/* For multihop handling */
>>> +#define TTM_PL_FLAG_TEMPORARY   (1 << 2)
>>>     /**
>>>    * struct ttm_place