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drm/amdkfd: bind cpu and hiveless gpu to a hive if xgmi connected

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If a CPU and GPU are xGMI connected but the GPU is hiveless with
respect to other GPUs, create a new CPU-GPU hive using the GPU's PCI
device location ID as the new hive ID to maintain fine grain memory
access usage.

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 2023-02-02 11:10:08 -05:00 committed by Alex Deucher
parent 8c45a8340d
commit 1698e200e8
1 changed files with 8 additions and 1 deletions
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9
drivers/gpu/drm/amd/amdkfd/kfd_topology.c
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@ -1328,8 +1328,15 @@ static void kfd_fill_iolink_non_crat_info(struct kfd_topology_device *dev)
/* Include the CPU peer in GPU hive if connected over xGMI. */
if (!peer_dev->gpu &&
link->iolink_type == CRAT_IOLINK_TYPE_XGMI)
link->iolink_type == CRAT_IOLINK_TYPE_XGMI) {
/*
* If the GPU is not part of a GPU hive, use its pci
* device location as the hive ID to bind with the CPU.
*/
if (!dev->node_props.hive_id)
dev->node_props.hive_id = pci_dev_id(dev->gpu->adev->pdev);
peer_dev->node_props.hive_id = dev->node_props.hive_id;
}
list_for_each_entry(inbound_link, &peer_dev->io_link_props,
list) {