diff options
| author | Rajneesh Bhardwaj <rajneesh.bhardwaj@amd.com> | 2020-04-21 18:00:07 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-03-23 22:52:59 -0400 |
| commit | d34184e3e3ad11603cc3103a467f1fdd71ee2915 (patch) | |
| tree | 176b09636a10b00057b02ffbe7d30ef552543bef /drivers/gpu/drm/amd/amdkfd | |
| parent | 3cbb3a9749a31a6e8549650df3d16a050acab3ca (diff) | |
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: Oak Zeng <oak.zeng@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdkfd')
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_crat.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c index 533df07964ec..c60e82697385 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c @@ -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 */ - sub_type_hdr->io_interface_type = CRAT_IOLINK_TYPE_PCIEXPRESS; + 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) |