[PATCH v2 1/1] drm/amdkfd: use allowed domain for vmbo validation

[Zeng, Oak]

Hi Nirmoy,

Why keep a unused parameter: +static int amdgpu_amdkfd_validate_vm_bo(void *_unused.

When I looked the codes, the only logic change is the validate page table bo in allowed_domain instead of vram domain. Can you explain why validate page table bo in vram domain cause a problem? When I looked at the codes, we only place page table in GTT domain when vram size is too small (function amdgpu_bo_get_preferred_pin_domain). Is there any other case we place page table in GTT?

Regards,
Oak 

 

On 2021-06-08, 8:02 AM, "amd-gfx on behalf of Das, Nirmoy" <amd-gfx-bounces at lists.freedesktop.org on behalf of Nirmoy.Das at amd.com> wrote:


    On 6/8/2021 1:42 PM, Christian König wrote:
    >
    >
    > Am 08.06.21 um 13:27 schrieb Nirmoy Das:
    >> Fixes handling when page tables are in system memory.
    >>
    >> v2: remove unwanted variable.
    >>      change amdgpu_amdkfd_validate instead of amdgpu_amdkfd_bo_validate.
    >>
    >> Signed-off-by: Nirmoy Das <nirmoy.das at amd.com>
    >> ---
    >>   drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 15 ++++-----------
    >>   1 file changed, 4 insertions(+), 11 deletions(-)
    >>
    >> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c 
    >> b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
    >> index d6cb7cf76623..021f25085760 100644
    >> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
    >> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
    >> @@ -348,11 +348,9 @@ static int amdgpu_amdkfd_bo_validate(struct 
    >> amdgpu_bo *bo, uint32_t domain,
    >>       return ret;
    >>   }
    >>
    >> -static int amdgpu_amdkfd_validate(void *param, struct amdgpu_bo *bo)
    >> +static int amdgpu_amdkfd_validate_vm_bo(void *_unused, struct 
    >> amdgpu_bo *bo)
    >>   {
    >> -    struct amdgpu_vm_parser *p = param;
    >
    > The structure define of amdgpu_vm_parser isn't used any more if we 
    > drop this as well, isn't it?


    Right, I missed that. I will resend.


    Nirmoy

    >
    > Christian.
    >
    >> -
    >> -    return amdgpu_amdkfd_bo_validate(bo, p->domain, p->wait);
    >> +    return amdgpu_amdkfd_bo_validate(bo, bo->allowed_domains, false);
    >>   }
    >>
    >>   /* vm_validate_pt_pd_bos - Validate page table and directory BOs
    >> @@ -366,20 +364,15 @@ static int vm_validate_pt_pd_bos(struct 
    >> amdgpu_vm *vm)
    >>   {
    >>       struct amdgpu_bo *pd = vm->root.base.bo;
    >>       struct amdgpu_device *adev = amdgpu_ttm_adev(pd->tbo.bdev);
    >> -    struct amdgpu_vm_parser param;
    >>       int ret;
    >>
    >> -    param.domain = AMDGPU_GEM_DOMAIN_VRAM;
    >> -    param.wait = false;
    >> -
    >> -    ret = amdgpu_vm_validate_pt_bos(adev, vm, amdgpu_amdkfd_validate,
    >> -                    &param);
    >> +    ret = amdgpu_vm_validate_pt_bos(adev, vm, 
    >> amdgpu_amdkfd_validate_vm_bo, NULL);
    >>       if (ret) {
    >>           pr_err("failed to validate PT BOs\n");
    >>           return ret;
    >>       }
    >>
    >> -    ret = amdgpu_amdkfd_validate(&param, pd);
    >> +    ret = amdgpu_amdkfd_validate_vm_bo(NULL, pd);
    >>       if (ret) {
    >>           pr_err("failed to validate PD\n");
    >>           return ret;
    >> -- 
    >> 2.31.1
    >>
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