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drm/amdkfd: support larger svm range allocation

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For larger range allocation, if hmm_range_fault return -EBUSY, set retry
timeout based on 1 second for every 512MB, this is safe timeout value.

Signed-off-by: Philip Yang <Philip.Yang@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Philip Yang 2021-03-30 14:02:53 -04:00 committed by Alex Deucher
parent 04d8d73dbc
commit d8a3c1c80c
1 changed files with 4 additions and 1 deletions
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5
drivers/gpu/drm/amd/amdgpu/amdgpu_mn.c
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@ -185,7 +185,10 @@ int amdgpu_hmm_range_get_pages(struct mmu_interval_notifier *notifier,
hmm_range->hmm_pfns = pfns;
hmm_range->start = start;
hmm_range->end = start + npages * PAGE_SIZE;
timeout = jiffies + msecs_to_jiffies(HMM_RANGE_DEFAULT_TIMEOUT);
/* Assuming 512MB takes maxmium 1 second to fault page address */
timeout = max(npages >> 17, 1ULL) * HMM_RANGE_DEFAULT_TIMEOUT;
timeout = jiffies + msecs_to_jiffies(timeout);
retry:
hmm_range->notifier_seq = mmu_interval_read_begin(notifier);