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drm/amdkfd: Don't assign dGPUs to APU topology devices 

dGPUs need their own topology devices. Don't assign them to APU topology
devices with CPU cores.

Bug: https://github.com/RadeonOpenCompute/ROCK-Kernel-Driver/issues/66
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Tested-by: Elias Konstantinidis <ekondis@gmail.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
hifive-unleashed-5.1
Felix Kuehling 2019-01-02 17:47:39 -05:00 committed by Alex Deucher
parent d1c234e2cd
commit bbdf514fe5
1 changed files with 9 additions and 3 deletions
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12
drivers/gpu/drm/amd/amdkfd/kfd_topology.c
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@ -1093,8 +1093,6 @@ static uint32_t kfd_generate_gpu_id(struct kfd_dev *gpu)
* the GPU device is not already present in the topology device
* list then return NULL. This means a new topology device has to
* be created for this GPU.
* TODO: Rather than assiging @gpu to first topology device withtout
* gpu attached, it will better to have more stringent check.
*/
static struct kfd_topology_device *kfd_assign_gpu(struct kfd_dev *gpu)
{
@ -1102,12 +1100,20 @@ static struct kfd_topology_device *kfd_assign_gpu(struct kfd_dev *gpu)
struct kfd_topology_device *out_dev = NULL;
down_write(&topology_lock);
list_for_each_entry(dev, &topology_device_list, list)
list_for_each_entry(dev, &topology_device_list, list) {
/* Discrete GPUs need their own topology device list
* entries. Don't assign them to CPU/APU nodes.
*/
if (!gpu->device_info->needs_iommu_device &&
dev->node_props.cpu_cores_count)
continue;
if (!dev->gpu && (dev->node_props.simd_count > 0)) {
dev->gpu = gpu;
out_dev = dev;
break;
}
}
up_write(&topology_lock);
return out_dev;
}