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drm/amdgpu: use hmm_pfns instead of array of pages

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we dont need to allocate local array of pages to hold
the pages returned by the hmm, instead we could use
the hmm_range structure itself to get to hmm_pfn
and get the required pages directly.

This avoids call to alloc/free quite a lot.

Signed-off-by: Sunil Khatri <sunil.khatri@amd.com>
Suggested-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Acked-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Sunil Khatri
2025-09-17 20:12:43 +05:30
committed by Alex Deucher
parent ae4d627e43
commit c5b3cc417b
9 changed files with 25 additions and 49 deletions
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10
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
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@@ -1089,7 +1089,7 @@ static int init_user_pages(struct kgd_mem *mem, uint64_t user_addr,
return 0;
}
ret = amdgpu_ttm_tt_get_user_pages(bo, bo->tbo.ttm->pages, &range);
ret = amdgpu_ttm_tt_get_user_pages(bo, &range);
if (ret) {
if (ret == -EAGAIN)
pr_debug("Failed to get user pages, try again\n");
@@ -1103,6 +1103,9 @@ static int init_user_pages(struct kgd_mem *mem, uint64_t user_addr,
pr_err("%s: Failed to reserve BO\n", __func__);
goto release_out;
}
amdgpu_ttm_tt_set_user_pages(bo->tbo.ttm, range);
amdgpu_bo_placement_from_domain(bo, mem->domain);
ret = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
if (ret)
@@ -2565,8 +2568,7 @@ static int update_invalid_user_pages(struct amdkfd_process_info *process_info,
}
/* Get updated user pages */
ret = amdgpu_ttm_tt_get_user_pages(bo, bo->tbo.ttm->pages,
&mem->range);
ret = amdgpu_ttm_tt_get_user_pages(bo, &mem->range);
if (ret) {
pr_debug("Failed %d to get user pages\n", ret);
@@ -2595,6 +2597,8 @@ static int update_invalid_user_pages(struct amdkfd_process_info *process_info,
ret = 0;
}
amdgpu_ttm_tt_set_user_pages(bo->tbo.ttm, mem->range);
mutex_lock(&process_info->notifier_lock);
/* Mark the BO as valid unless it was invalidated