To account for various PCIe and xGMI setups, check the no atomics settings for a device in relation to every direct peer. v2: apply suggested clean ups in main loop. Signed-off-by: Jonathan Kim <jonathan.kim@xxxxxxx> --- drivers/gpu/drm/amd/amdkfd/kfd_topology.c | 61 ++++++++++++++--------- 1 file changed, 37 insertions(+), 24 deletions(-) diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_topology.c b/drivers/gpu/drm/amd/amdkfd/kfd_topology.c index 30430aefcfc7..fb4f718a1148 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_topology.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_topology.c @@ -1192,47 +1192,60 @@ static void kfd_fill_mem_clk_max_info(struct kfd_topology_device *dev) mem->mem_clk_max = local_mem_info.mem_clk_max; } -static void kfd_fill_iolink_non_crat_info(struct kfd_topology_device *dev) +static void kfd_set_iolink_no_atomics(struct kfd_topology_device *dev, + struct kfd_topology_device *target_gpu_dev, + struct kfd_iolink_properties *link) { - struct kfd_iolink_properties *link, *cpu_link; - struct kfd_topology_device *cpu_dev; - struct amdgpu_device *adev; - uint32_t cap; - uint32_t cpu_flag = CRAT_IOLINK_FLAGS_ENABLED; - uint32_t flag = CRAT_IOLINK_FLAGS_ENABLED; - - if (!dev || !dev->gpu) + /* xgmi always supports atomics between links. */ + if (link->iolink_type == CRAT_IOLINK_TYPE_XGMI) return; - adev = (struct amdgpu_device *)(dev->gpu->kgd); - if (!adev->gmc.xgmi.connected_to_cpu) { - pcie_capability_read_dword(dev->gpu->pdev, + /* check pcie support to set cpu(dev) flags for target_gpu_dev link. */ + if (target_gpu_dev) { + uint32_t cap; + + pcie_capability_read_dword(target_gpu_dev->gpu->pdev, PCI_EXP_DEVCAP2, &cap); if (!(cap & (PCI_EXP_DEVCAP2_ATOMIC_COMP32 | PCI_EXP_DEVCAP2_ATOMIC_COMP64))) - cpu_flag |= CRAT_IOLINK_FLAGS_NO_ATOMICS_32_BIT | + link->flags |= CRAT_IOLINK_FLAGS_NO_ATOMICS_32_BIT | CRAT_IOLINK_FLAGS_NO_ATOMICS_64_BIT; - } - - if (!adev->gmc.xgmi.num_physical_nodes) { + /* set gpu (dev) flags. */ + } else { if (!dev->gpu->pci_atomic_requested || dev->gpu->device_info->asic_family == CHIP_HAWAII) - flag |= CRAT_IOLINK_FLAGS_NO_ATOMICS_32_BIT | + link->flags |= CRAT_IOLINK_FLAGS_NO_ATOMICS_32_BIT | CRAT_IOLINK_FLAGS_NO_ATOMICS_64_BIT; } +} + +static void kfd_fill_iolink_non_crat_info(struct kfd_topology_device *dev) +{ + struct kfd_iolink_properties *link, *inbound_link; + struct kfd_topology_device *peer_dev; + + if (!dev || !dev->gpu) + return; /* GPU only creates direct links so apply flags setting to all */ list_for_each_entry(link, &dev->io_link_props, list) { - link->flags = flag; - cpu_dev = kfd_topology_device_by_proximity_domain( + link->flags = CRAT_IOLINK_FLAGS_ENABLED; + kfd_set_iolink_no_atomics(dev, NULL, link); + peer_dev = kfd_topology_device_by_proximity_domain( link->node_to); - if (cpu_dev) { - list_for_each_entry(cpu_link, - &cpu_dev->io_link_props, list) - if (cpu_link->node_to == link->node_from) - cpu_link->flags = cpu_flag; + + if (!peer_dev) + continue; + + list_for_each_entry(inbound_link, &peer_dev->io_link_props, + list) { + if (inbound_link->node_to != link->node_from) + continue; + + inbound_link->flags = CRAT_IOLINK_FLAGS_ENABLED; + kfd_set_iolink_no_atomics(peer_dev, dev, inbound_link); } } } -- 2.17.1 _______________________________________________ amd-gfx mailing list amd-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/amd-gfx