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| author | Jonathan Kim <jonathan.kim@amd.com> | 2021-05-12 12:30:41 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-07-23 10:07:59 -0400 |
| commit | 3f46c4e9ce25bbcb9d619dbce57c8737c856b272 (patch) | |
| tree | 770486122e37b2b72b14c3a27f6b31b8f4005071 /drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c | |
| parent | 331e78187f3a477145819912114b48219f9fa19a (diff) | |
| download | linux-3f46c4e9ce25bbcb9d619dbce57c8737c856b272.tar.gz | |
drm/amdkfd: report xgmi bandwidth between direct peers to the kfd
Report the min/max bandwidth in megabytes to the kfd for direct
xgmi connections only. Indirect peers will report 0 since
indirect route is unknown.
Signed-off-by: Jonathan Kim <jonathan.kim@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c index f9c01bdc3d4c..801403d53058 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c @@ -553,6 +553,30 @@ uint8_t amdgpu_amdkfd_get_xgmi_hops_count(struct kgd_dev *dst, struct kgd_dev *s return (uint8_t)ret; } +int amdgpu_amdkfd_get_xgmi_bandwidth_mbytes(struct kgd_dev *dst, struct kgd_dev *src, bool is_min) +{ + struct amdgpu_device *adev = (struct amdgpu_device *)dst, *peer_adev; + int num_links; + + if (adev->asic_type != CHIP_ALDEBARAN) + return 0; + + if (src) + peer_adev = (struct amdgpu_device *)src; + + /* num links returns 0 for indirect peers since indirect route is unknown. */ + num_links = is_min ? 1 : amdgpu_xgmi_get_num_links(adev, peer_adev); + if (num_links < 0) { + DRM_ERROR("amdgpu: failed to get xgmi num links between node %d and %d. ret = %d\n", + adev->gmc.xgmi.physical_node_id, + peer_adev->gmc.xgmi.physical_node_id, num_links); + num_links = 0; + } + + /* Aldebaran xGMI DPM is defeatured so assume x16 x 25Gbps for bandwidth. */ + return (num_links * 16 * 25000)/BITS_PER_BYTE; +} + uint64_t amdgpu_amdkfd_get_mmio_remap_phys_addr(struct kgd_dev *kgd) { struct amdgpu_device *adev = (struct amdgpu_device *)kgd; |