From e69e9007b78b1004c257d3d308bb837f4544a84a Mon Sep 17 00:00:00 2001 From: Yong Zhao Date: Wed, 9 Jan 2019 23:31:14 -0500 Subject: [PATCH 2739/2940] drm/amdkfd: Optimize out sdma doorbell array in kgd2kfd_shared_resources We can directly calculate sdma doorbell indexes in the process doorbell pages through the doorbell_index structure in amdgpu_device, so no need to cache them in kgd2kfd_shared_resources any more. This alleviates the adaptation needs when new SDMA configurations are introduced. Change-Id: Ic657799856ed0256f36b01e502ef0cab263b1f49 Signed-off-by: Yong Zhao Reviewed-by: Felix Kuehling --- drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c | 3 ++- .../drm/amd/amdkfd/kfd_device_queue_manager.c | 16 +++++++++++----- drivers/gpu/drm/amd/include/kgd_kfd_interface.h | 4 ++-- 3 files changed, 15 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c index ea15e27f61f9..01b35b0455ca 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c @@ -145,7 +145,8 @@ void amdgpu_amdkfd_device_init(struct amdgpu_device *adev) .gpuvm_size = min(adev->vm_manager.max_pfn << AMDGPU_GPU_PAGE_SHIFT, AMDGPU_GMC_HOLE_START), - .drm_render_minor = adev->ddev->render->index + .drm_render_minor = adev->ddev->render->index, + .sdma_doorbell_idx = adev->doorbell_index.sdma_engine, }; /* this is going to have a few of the MSBs set that we need to diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c index 8372556b52eb..c6c9530e704e 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c @@ -134,12 +134,18 @@ static int allocate_doorbell(struct qcm_process_device *qpd, struct queue *q) */ q->doorbell_id = q->properties.queue_id; } else if (q->properties.type == KFD_QUEUE_TYPE_SDMA) { - /* For SDMA queues on SOC15, use static doorbell - * assignments based on the engine and queue. + /* For SDMA queues on SOC15 with 8-byte doorbell, use static + * doorbell assignments based on the engine and queue id. + * The doobell index distance between RLC (2*i) and (2*i+1) + * for a SDMA engine is 512. */ - q->doorbell_id = dev->shared_resources.sdma_doorbell - [q->properties.sdma_engine_id] - [q->properties.sdma_queue_id]; + uint32_t *idx_offset = + dev->shared_resources.sdma_doorbell_idx; + + q->doorbell_id = idx_offset[q->properties.sdma_engine_id] + + (q->properties.sdma_queue_id & 1) + * KFD_QUEUE_DOORBELL_MIRROR_OFFSET + + (q->properties.sdma_queue_id >> 1); } else { /* For CP queues on SOC15 reserve a free doorbell ID */ unsigned int found; diff --git a/drivers/gpu/drm/amd/include/kgd_kfd_interface.h b/drivers/gpu/drm/amd/include/kgd_kfd_interface.h index 7e44dcd15cdc..b71b684ad6fd 100644 --- a/drivers/gpu/drm/amd/include/kgd_kfd_interface.h +++ b/drivers/gpu/drm/amd/include/kgd_kfd_interface.h @@ -110,11 +110,11 @@ struct kgd2kfd_shared_resources { /* Bit n == 1 means Queue n is available for KFD */ DECLARE_BITMAP(queue_bitmap, KGD_MAX_QUEUES); - /* Doorbell assignments (SOC15 and later chips only). Only + /* SDMA doorbell assignments (SOC15 and later chips only). Only * specific doorbells are routed to each SDMA engine. Others * are routed to IH and VCN. They are not usable by the CP. */ - unsigned int sdma_doorbell[2][2]; + uint32_t *sdma_doorbell_idx; /* From SOC15 onward, the doorbell index range not usable for CP * queues. -- 2.17.1