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drm/amdkfd: report xgmi bandwidth between direct peers to the kfd

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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>
This commit is contained in:
Jonathan Kim
2021-05-12 12:30:41 -04:00
committed by Alex Deucher
parent 331e78187f
commit 3f46c4e9ce
5 changed files with 51 additions and 0 deletions
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24
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c
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@@ -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;