On 2020-02-19 9:44 a.m., Christian König wrote:
> Well it should apply on top of amd-staging-drm-next. But I haven't
> fetched that today yet.
>
> Give me a minute to rebase.
This patch seems to have fixed the regression we saw yesterday.
It applies to amd-staging-drm-next with a small jitter:
$patch -p1 < /tmp/\[PATCH\]\ drm_amdgpu\:\ add\ VM\ update\ fences\ back\ to\ the\ root\ PD.eml
patching file amdgpu_vm.c
Hunk #2 succeeded at 1599 (offset -20 lines).
I've been running 'glxgears' on the root window and 'pinion'
and no problems--clean log.
Tested-by: Luben Tuikov <luben.tuikov@xxxxxxx>
Regards,
Luben
>
> Christian.
>
> Am 19.02.20 um 15:27 schrieb Tom St Denis:
>> This doesn't apply on top of 7fd3b632e17e55c5ffd008f9f025754e7daa1b66
>> which is the tip of drm-next
>>
>>
>> Tom
>>
>> On 2020-02-19 9:20 a.m., Christian König wrote:
>>> Add update fences to the root PD while mapping BOs.
>>>
>>> Otherwise PDs freed during the mapping won't wait for
>>> updates to finish and can cause corruptions.
>>>
>>> Signed-off-by: Christian König <christian.koenig@xxxxxxx>
>>> ---
>>> drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 14 ++++++++++++--
>>> 1 file changed, 12 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
>>> index e7ab0c1e2793..dd63ccdbad2a 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
>>> @@ -585,8 +585,8 @@ void amdgpu_vm_get_pd_bo(struct amdgpu_vm *vm,
>>> {
>>> entry->priority = 0;
>>> entry->tv.bo = &vm->root.base.bo->tbo;
>>> - /* One for TTM and one for the CS job */
>>> - entry->tv.num_shared = 2;
>>> + /* Two for VM updates, one for TTM and one for the CS job */
>>> + entry->tv.num_shared = 4;
>>> entry->user_pages = NULL;
>>> list_add(&entry->tv.head, validated);
>>> }
>>> @@ -1619,6 +1619,16 @@ static int amdgpu_vm_bo_update_mapping(struct
>>> amdgpu_device *adev,
>>> goto error_unlock;
>>> }
>>> + if (flags & AMDGPU_PTE_VALID) {
>>> + struct amdgpu_bo *root = vm->root.base.bo;
>>> +
>>> + if (!dma_fence_is_signaled(vm->last_direct))
>>> + amdgpu_bo_fence(root, vm->last_direct, true);
>>> +
>>> + if (!dma_fence_is_signaled(vm->last_delayed))
>>> + amdgpu_bo_fence(root, vm->last_delayed, true);
>>> + }
>>> +
>>> r = vm->update_funcs->prepare(¶ms, resv, sync_mode);
>>> if (r)
>>> goto error_unlock;
>
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