[PATCH libdrm] libdrm_amdgpu: add kernel semaphore support
Christian König
deathsimple at vodafone.de
Fri Jul 7 09:07:37 UTC 2017
Hi Dave,
on first glance that looks rather good to me, but there is one things I
don't really like and I strongly think Marek will absolutely agree on
that: When we add a new CS function then let's get ride of all this
abstraction!
The new function should get an amdgpu_device_handle and a list of chunks
to submit, nothing else.
When then provide helper functions to generate the chunks out of the
existing amdgpu_context_handle and amdgpu_bo_list_handle.
That should be perfectly sufficient and extensible for future additions
as well.
Regards,
Christian.
Am 07.07.2017 um 00:19 schrieb Dave Airlie:
> Chrstian,
>
> you are probably the best person to ack this, I'd like to get the radv
> code landed
> and allow the GL code to get going.
>
> Dave.
>
>> This adds kernel semaphore support to the command submission
>> interface in what should be a backwards compatible manner,
>> it adds a new command submission API.
>>
>> Signed-off-by: Dave Airlie <airlied at redhat.com>
>> ---
>> amdgpu/amdgpu.h | 29 ++++++++++++-
>> amdgpu/amdgpu_cs.c | 118 +++++++++++++++++++++++++++++++++++++++++++++++++----
>> 2 files changed, 138 insertions(+), 9 deletions(-)
>>
>> diff --git a/amdgpu/amdgpu.h b/amdgpu/amdgpu.h
>> index 1901fa8..649b66e 100644
>> --- a/amdgpu/amdgpu.h
>> +++ b/amdgpu/amdgpu.h
>> @@ -369,6 +369,16 @@ struct amdgpu_cs_request {
>> struct amdgpu_cs_fence_info fence_info;
>> };
>>
>> +struct amdgpu_cs_request_syncobj {
>> + /*
>> + *
>> + */
>> + uint32_t number_in_syncobj;
>> + uint32_t number_out_syncobj;
>> + uint32_t *in_syncobj;
>> + uint32_t *out_syncobj;
>> +};
>> +
>> /**
>> * Structure which provide information about GPU VM MC Address space
>> * alignments requirements
>> @@ -886,6 +896,12 @@ int amdgpu_cs_submit(amdgpu_context_handle context,
>> struct amdgpu_cs_request *ibs_request,
>> uint32_t number_of_requests);
>>
>> +int amdgpu_cs_submit_syncobj(amdgpu_context_handle context,
>> + uint64_t flags,
>> + struct amdgpu_cs_request *ibs_request,
>> + struct amdgpu_cs_request_syncobj *ibs_syncobj,
>> + uint32_t number_of_requests);
>> +
>> /**
>> * Query status of Command Buffer Submission
>> *
>> @@ -1328,8 +1344,19 @@ int amdgpu_cs_destroy_semaphore(amdgpu_semaphore_handle sem);
>> */
>> const char *amdgpu_get_marketing_name(amdgpu_device_handle dev);
>>
>> +
>> +int amdgpu_cs_create_syncobj(amdgpu_device_handle dev,
>> + uint32_t *syncobj);
>> +int amdgpu_cs_export_syncobj(amdgpu_device_handle dev,
>> + uint32_t syncobj,
>> + int *shared_fd);
>> +int amdgpu_cs_import_syncobj(amdgpu_device_handle dev,
>> + int shared_fd,
>> + uint32_t *syncobj);
>> +int amdgpu_cs_destroy_syncobj(amdgpu_device_handle dev,
>> + uint32_t syncobj);
>> +
>> #ifdef __cplusplus
>> }
>> #endif
>> -
>> #endif /* #ifdef _AMDGPU_H_ */
>> diff --git a/amdgpu/amdgpu_cs.c b/amdgpu/amdgpu_cs.c
>> index 868eb7b..339c5f9 100644
>> --- a/amdgpu/amdgpu_cs.c
>> +++ b/amdgpu/amdgpu_cs.c
>> @@ -168,7 +168,8 @@ int amdgpu_cs_query_reset_state(amdgpu_context_handle context,
>> * \sa amdgpu_cs_submit()
>> */
>> static int amdgpu_cs_submit_one(amdgpu_context_handle context,
>> - struct amdgpu_cs_request *ibs_request)
>> + struct amdgpu_cs_request *ibs_request,
>> + struct amdgpu_cs_request_syncobj *syncobj_request)
>> {
>> union drm_amdgpu_cs cs;
>> uint64_t *chunk_array;
>> @@ -176,10 +177,13 @@ static int amdgpu_cs_submit_one(amdgpu_context_handle context,
>> struct drm_amdgpu_cs_chunk_data *chunk_data;
>> struct drm_amdgpu_cs_chunk_dep *dependencies = NULL;
>> struct drm_amdgpu_cs_chunk_dep *sem_dependencies = NULL;
>> + struct drm_amdgpu_cs_chunk_sem *in_syncobj_dependencies = NULL;
>> + struct drm_amdgpu_cs_chunk_sem *out_syncobj_dependencies = NULL;
>> struct list_head *sem_list;
>> amdgpu_semaphore_handle sem, tmp;
>> - uint32_t i, size, sem_count = 0;
>> + uint32_t i, j, size, sem_count = 0;
>> bool user_fence;
>> + uint32_t sem_size = 0;
>> int r = 0;
>>
>> if (ibs_request->ip_type >= AMDGPU_HW_IP_NUM)
>> @@ -194,7 +198,11 @@ static int amdgpu_cs_submit_one(amdgpu_context_handle context,
>> }
>> user_fence = (ibs_request->fence_info.handle != NULL);
>>
>> - size = ibs_request->number_of_ibs + (user_fence ? 2 : 1) + 1;
>> + if (syncobj_request) {
>> + sem_size += syncobj_request->number_in_syncobj ? 1 : 0;
>> + sem_size += syncobj_request->number_out_syncobj ? 1 : 0;
>> + }
>> + size = ibs_request->number_of_ibs + (user_fence ? 2 : 1) + 1 + sem_size;
>>
>> chunk_array = alloca(sizeof(uint64_t) * size);
>> chunks = alloca(sizeof(struct drm_amdgpu_cs_chunk) * size);
>> @@ -306,6 +314,45 @@ static int amdgpu_cs_submit_one(amdgpu_context_handle context,
>> chunks[i].chunk_data = (uint64_t)(uintptr_t)sem_dependencies;
>> }
>>
>> + if (syncobj_request) {
>> + if (syncobj_request->number_in_syncobj) {
>> + in_syncobj_dependencies = malloc(sizeof(struct drm_amdgpu_cs_chunk_sem) * syncobj_request->number_in_syncobj);
>> + if (!in_syncobj_dependencies) {
>> + r = -ENOMEM;
>> + goto error_unlock;
>> + }
>> + for (j = 0; j < syncobj_request->number_in_syncobj; j++) {
>> + struct drm_amdgpu_cs_chunk_sem *dep = &in_syncobj_dependencies[j];
>> + dep->handle = syncobj_request->in_syncobj[j];
>> + }
>> + i = cs.in.num_chunks++;
>> +
>> + /* dependencies chunk */
>> + chunk_array[i] = (uint64_t)(uintptr_t)&chunks[i];
>> + chunks[i].chunk_id = AMDGPU_CHUNK_ID_SYNCOBJ_IN;
>> + chunks[i].length_dw = sizeof(struct drm_amdgpu_cs_chunk_sem) / 4 * syncobj_request->number_in_syncobj;
>> + chunks[i].chunk_data = (uint64_t)(uintptr_t)in_syncobj_dependencies;
>> + }
>> + if (syncobj_request->number_out_syncobj) {
>> + out_syncobj_dependencies = malloc(sizeof(struct drm_amdgpu_cs_chunk_sem) * syncobj_request->number_out_syncobj);
>> + if (!out_syncobj_dependencies) {
>> + r = -ENOMEM;
>> + goto error_unlock;
>> + }
>> + for (j = 0; j < syncobj_request->number_out_syncobj; j++) {
>> + struct drm_amdgpu_cs_chunk_sem *dep = &out_syncobj_dependencies[j];
>> + dep->handle = syncobj_request->out_syncobj[j];
>> + }
>> + i = cs.in.num_chunks++;
>> +
>> + /* dependencies chunk */
>> + chunk_array[i] = (uint64_t)(uintptr_t)&chunks[i];
>> + chunks[i].chunk_id = AMDGPU_CHUNK_ID_SYNCOBJ_OUT;
>> + chunks[i].length_dw = sizeof(struct drm_amdgpu_cs_chunk_sem) / 4 * syncobj_request->number_out_syncobj;
>> + chunks[i].chunk_data = (uint64_t)(uintptr_t)out_syncobj_dependencies;
>> + }
>> + }
>> +
>> r = drmCommandWriteRead(context->dev->fd, DRM_AMDGPU_CS,
>> &cs, sizeof(cs));
>> if (r)
>> @@ -317,31 +364,48 @@ error_unlock:
>> pthread_mutex_unlock(&context->sequence_mutex);
>> free(dependencies);
>> free(sem_dependencies);
>> + free(in_syncobj_dependencies);
>> + free(out_syncobj_dependencies);
>> return r;
>> }
>>
>> -int amdgpu_cs_submit(amdgpu_context_handle context,
>> - uint64_t flags,
>> - struct amdgpu_cs_request *ibs_request,
>> - uint32_t number_of_requests)
>> +int amdgpu_cs_submit_syncobj(amdgpu_context_handle context,
>> + uint64_t flags,
>> + struct amdgpu_cs_request *ibs_request,
>> + struct amdgpu_cs_request_syncobj *ibs_syncobj,
>> + uint32_t number_of_requests)
>> {
>> uint32_t i;
>> int r;
>> + bool has_syncobj = ibs_syncobj ? true : false;
>>
>> if (!context || !ibs_request)
>> return -EINVAL;
>>
>> r = 0;
>> for (i = 0; i < number_of_requests; i++) {
>> - r = amdgpu_cs_submit_one(context, ibs_request);
>> + r = amdgpu_cs_submit_one(context, ibs_request, has_syncobj ? ibs_syncobj : NULL);
>> if (r)
>> break;
>> ibs_request++;
>> + if (has_syncobj)
>> + ibs_syncobj++;
>> }
>>
>> return r;
>> }
>>
>> +int amdgpu_cs_submit(amdgpu_context_handle context,
>> + uint64_t flags,
>> + struct amdgpu_cs_request *ibs_request,
>> + uint32_t number_of_requests)
>> +{
>> + return amdgpu_cs_submit_syncobj(context, flags,
>> + ibs_request, NULL,
>> + number_of_requests);
>> +}
>> +
>> +
>> /**
>> * Calculate absolute timeout.
>> *
>> @@ -596,3 +660,41 @@ int amdgpu_cs_destroy_semaphore(amdgpu_semaphore_handle sem)
>> {
>> return amdgpu_cs_unreference_sem(sem);
>> }
>> +
>> +int amdgpu_cs_create_syncobj(amdgpu_device_handle dev,
>> + uint32_t *handle)
>> +{
>> + if (NULL == dev)
>> + return -EINVAL;
>> +
>> + return drmSyncobjCreate(dev->fd, 0, handle);
>> +}
>> +
>> +int amdgpu_cs_destroy_syncobj(amdgpu_device_handle dev,
>> + uint32_t handle)
>> +{
>> + if (NULL == dev)
>> + return -EINVAL;
>> +
>> + return drmSyncobjDestroy(dev->fd, handle);
>> +}
>> +
>> +int amdgpu_cs_export_syncobj(amdgpu_device_handle dev,
>> + uint32_t handle,
>> + int *shared_fd)
>> +{
>> + if (NULL == dev)
>> + return -EINVAL;
>> +
>> + return drmSyncobjHandleToFD(dev->fd, handle, shared_fd);
>> +}
>> +
>> +int amdgpu_cs_import_syncobj(amdgpu_device_handle dev,
>> + int shared_fd,
>> + uint32_t *handle)
>> +{
>> + if (NULL == dev)
>> + return -EINVAL;
>> +
>> + return drmSyncobjFDToHandle(dev->fd, shared_fd, handle);
>> +}
>> --
>> 2.9.4
>>
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>> amd-gfx at lists.freedesktop.org
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