On 7/16/2021 10:13 PM, Jonathan Kim wrote:
Report the min/max bandwidth in megabytes to the kfd for direct xgmi connections only. v2: change reporting from num links to bandwidth Signed-off-by: Jonathan Kim <jonathan....@amd.com> --- drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c | 23 ++++++++++++++++++++++ drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h | 1 + drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c | 12 +++++++++++ drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h | 2 ++ drivers/gpu/drm/amd/amdkfd/kfd_crat.c | 12 +++++++++++ 5 files changed, 50 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c index bfab2f9fdd17..3978578a1c49 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c @@ -553,6 +553,29 @@ 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 = 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;
Instead of having ASIC family checks and bandwidth info in interface functions, better to have this info come from base layer (amdgpu_xgmi or xgmi ip). That will help to handle other ASICs.
Thanks, Lijo
uint64_t amdgpu_amdkfd_get_mmio_remap_phys_addr(struct kgd_dev *kgd) { struct amdgpu_device *adev = (struct amdgpu_device *)kgd; diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h index 81264517d532..e12fccb2d2c4 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h @@ -226,6 +226,7 @@ uint32_t amdgpu_amdkfd_get_num_gws(struct kgd_dev *kgd); uint32_t amdgpu_amdkfd_get_asic_rev_id(struct kgd_dev *kgd); int amdgpu_amdkfd_get_noretry(struct kgd_dev *kgd); uint8_t amdgpu_amdkfd_get_xgmi_hops_count(struct kgd_dev *dst, struct kgd_dev *src); +int amdgpu_amdkfd_get_xgmi_bandwidth_mbytes(struct kgd_dev *dst, struct kgd_dev *src, bool is_min);/* Read user wptr from a specified user address space with page fault* disabled. The memory must be pinned and mapped to the hardware when diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c index 8567d5d77346..258cf86b32f6 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c @@ -486,6 +486,18 @@ int amdgpu_xgmi_get_hops_count(struct amdgpu_device *adev, return -EINVAL; }+int amdgpu_xgmi_get_num_links(struct amdgpu_device *adev,+ struct amdgpu_device *peer_adev) +{ + struct psp_xgmi_topology_info *top = &adev->psp.xgmi_context.top_info; + int i; + + for (i = 0 ; i < top->num_nodes; ++i) + if (top->nodes[i].node_id == peer_adev->gmc.xgmi.node_id) + return top->nodes[i].num_links; + return -EINVAL; +} + int amdgpu_xgmi_add_device(struct amdgpu_device *adev) { struct psp_xgmi_topology_info *top_info; diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h index 12969c0830d5..d2189bf7d428 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h @@ -59,6 +59,8 @@ int amdgpu_xgmi_remove_device(struct amdgpu_device *adev); int amdgpu_xgmi_set_pstate(struct amdgpu_device *adev, int pstate); int amdgpu_xgmi_get_hops_count(struct amdgpu_device *adev, struct amdgpu_device *peer_adev); +int amdgpu_xgmi_get_num_links(struct amdgpu_device *adev, + struct amdgpu_device *peer_adev); uint64_t amdgpu_xgmi_get_relative_phy_addr(struct amdgpu_device *adev, uint64_t addr); static inline bool amdgpu_xgmi_same_hive(struct amdgpu_device *adev, diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c index c6b02aee4993..40ce6239c813 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c @@ -1989,6 +1989,13 @@ static int kfd_fill_gpu_direct_io_link_to_cpu(int *avail_size, sub_type_hdr->flags |= CRAT_IOLINK_FLAGS_BI_DIRECTIONAL; sub_type_hdr->io_interface_type = CRAT_IOLINK_TYPE_XGMI; sub_type_hdr->num_hops_xgmi = 1; + if (adev->asic_type == CHIP_ALDEBARAN) { + sub_type_hdr->minimum_bandwidth_mbs = + amdgpu_amdkfd_get_xgmi_bandwidth_mbytes( + kdev->kgd, NULL, true); + sub_type_hdr->maximum_bandwidth_mbs = + sub_type_hdr->minimum_bandwidth_mbs; + } } else { sub_type_hdr->io_interface_type = CRAT_IOLINK_TYPE_PCIEXPRESS; } @@ -2033,6 +2040,11 @@ static int kfd_fill_gpu_xgmi_link_to_gpu(int *avail_size, sub_type_hdr->proximity_domain_to = proximity_domain_to; sub_type_hdr->num_hops_xgmi = amdgpu_amdkfd_get_xgmi_hops_count(kdev->kgd, peer_kdev->kgd); + sub_type_hdr->maximum_bandwidth_mbs = + amdgpu_amdkfd_get_xgmi_bandwidth_mbytes(kdev->kgd, peer_kdev->kgd, false); + sub_type_hdr->minimum_bandwidth_mbs = sub_type_hdr->maximum_bandwidth_mbs ? + amdgpu_amdkfd_get_xgmi_bandwidth_mbytes(kdev->kgd, NULL, true) : 0; + return 0; }
_______________________________________________ amd-gfx mailing list amd-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/amd-gfx
