Commit d34184e3 authored by Rajneesh Bhardwaj's avatar Rajneesh Bhardwaj Committed by Alex Deucher
Browse files

drm/amdkfd: expose host gpu link via sysfs (v2) 



Currently host-gpu io link is always reported as PCIe however, on some
A+A systems, there could be one xgmi link available. This change exposes
xgmi link via sysfs when it is present.

v2: fix includes (Alex)

Reviewed-by: default avatarOak Zeng <oak.zeng@amd.com>
Reviewed-by: default avatarHawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: default avatarRajneesh Bhardwaj <rajneesh.bhardwaj@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 3cbb3a97

drivers/gpu/drm/amd/amdkfd/kfd_crat.c

+15 −1
Original line number Diff line number Diff line
@@ -26,6 +26,7 @@ 
#include "kfd_priv.h"

#include "kfd_topology.h"

#include "kfd_iommu.h"

#include "amdgpu.h"

#include "amdgpu_amdkfd.h"



/* GPU Processor ID base for dGPUs for which VCRAT needs to be created.
@@ -1113,6 +1114,8 @@ static int kfd_fill_gpu_direct_io_link_to_cpu(int *avail_size, 
			struct crat_subtype_iolink *sub_type_hdr,

			uint32_t proximity_domain)

{

	struct amdgpu_device *adev = (struct amdgpu_device *)kdev->kgd;



	*avail_size -= sizeof(struct crat_subtype_iolink);

	if (*avail_size < 0)

		return -ENOMEM;
@@ -1129,7 +1132,18 @@ static int kfd_fill_gpu_direct_io_link_to_cpu(int *avail_size, 
	/* Fill in IOLINK subtype.

	 * TODO: Fill-in other fields of iolink subtype

	 */

	if (adev->gmc.xgmi.connected_to_cpu) {

		/*

		 * with host gpu xgmi link, host can access gpu memory whether

		 * or not pcie bar type is large, so always create bidirectional

		 * io link.

		 */

		sub_type_hdr->flags |= CRAT_IOLINK_FLAGS_BI_DIRECTIONAL;

		sub_type_hdr->io_interface_type = CRAT_IOLINK_TYPE_XGMI;

	} else {

		sub_type_hdr->io_interface_type = CRAT_IOLINK_TYPE_PCIEXPRESS;

	}



	sub_type_hdr->proximity_domain_from = proximity_domain;

#ifdef CONFIG_NUMA

	if (kdev->pdev->dev.numa_node == NUMA_NO_NODE)