From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 710B8D3E77B for ; Wed, 10 Dec 2025 20:15:27 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 165CA10E0B7; Wed, 10 Dec 2025 20:15:27 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.b="Zz5NlAAU"; dkim-atps=neutral Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by gabe.freedesktop.org (Postfix) with ESMTPS id AF1D110E27D for ; Wed, 10 Dec 2025 20:15:24 +0000 (UTC) Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 97254442D0 for ; Wed, 10 Dec 2025 20:15:24 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 32462C116B1; Wed, 10 Dec 2025 20:15:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1765397724; bh=g8IA/yAtAmEQj8bbAWR09o1l3GSTs+Xt9uRalseGKhg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Zz5NlAAUX6xwOPNJ9O9aDwERUEisG6TEJfp/U/7z5HjBzs6FSDvKxS3rz9DiTwwCs G0a4USsA5bBptDG8DJngHBL/gmjmGbM/CExUqXVlXb3Q82QxIi0ahxJs9NS2TexuvH SAZ5hZ3kVeDWLul5svDOajLY/MiSTtJXoOGCzar7K36Lz1Xo6FDJAiFLK3acmb//9Y CDA5q0qpvXYF+Z7mZrjaL3A3E7a5nIp8ERDbFuhVGLX9kgksVQdPMMOZoZz4qZTo80 pR5ut4uJD8tjuXldRCrwKVa5Z/YqqLSn6Czbmm8nz3bxIXp3Y4VTiExbh+Q1hFNpcJ HSS6dqtTum7gQ== From: "Mario Limonciello (AMD)" To: amd-gfx@lists.freedesktop.org Cc: "Mario Limonciello (AMD)" Subject: [PATCH v2 3/3] amdkfd: Add device links between kfd device and amdgpu device Date: Wed, 10 Dec 2025 14:15:10 -0600 Message-ID: <20251210201510.3000-4-superm1@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20251210201510.3000-1-superm1@kernel.org> References: <20251210201510.3000-1-superm1@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: amd-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussion list for AMD gfx List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: amd-gfx-bounces@lists.freedesktop.org Sender: "amd-gfx" Mapping out a KFD device to a GPU can be done manually by looking at the domain and location properties. To make it easier to discover which KFD device goes with what GPU add bidirectional links. Signed-off-by: Mario Limonciello (AMD) --- drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c | 8 +++++ drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h | 1 + drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 4 +++ drivers/gpu/drm/amd/amdkfd/kfd_topology.c | 36 +++++++++++++++++++ .../gpu/drm/amd/include/kgd_kfd_interface.h | 2 ++ 5 files changed, 51 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c index a2879d2b7c8ec..5d6cf3adfa7b8 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c @@ -910,3 +910,11 @@ int amdgpu_amdkfd_config_sq_perfmon(struct amdgpu_device *adev, uint32_t xcp_id, return r; } + +int amdgpu_amdkfd_create_sysfs_links(struct amdgpu_device *adev) +{ + if (!adev->kfd.init_complete || !adev->kfd.dev) + return 0; + + return kgd2kfd_create_sysfs_links(adev->kfd.dev); +} diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h index da4575676335f..fd92b227a674b 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h @@ -272,6 +272,7 @@ int amdgpu_amdkfd_stop_sched(struct amdgpu_device *adev, uint32_t node_id); int amdgpu_amdkfd_config_sq_perfmon(struct amdgpu_device *adev, uint32_t xcp_id, bool core_override_enable, bool reg_override_enable, bool perfmon_override_enable); bool amdgpu_amdkfd_compute_active(struct amdgpu_device *adev, uint32_t node_id); +int amdgpu_amdkfd_create_sysfs_links(struct amdgpu_device *adev); /* Read user wptr from a specified user address space with page fault diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index 7a0213a07023d..44c9320d72a56 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -4947,6 +4947,10 @@ int amdgpu_device_init(struct amdgpu_device *adev, */ r = amdgpu_device_sys_interface_init(adev); + r = amdgpu_amdkfd_create_sysfs_links(adev); + if (r) + dev_err(adev->dev, "Failed to create KFD sysfs link: %d\n", r); + if (IS_ENABLED(CONFIG_PERF_EVENTS)) r = amdgpu_pmu_init(adev); if (r) diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_topology.c b/drivers/gpu/drm/amd/amdkfd/kfd_topology.c index b65f29294e2d6..796fd411a7dcc 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_topology.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_topology.c @@ -79,6 +79,37 @@ struct kfd_topology_device *kfd_topology_device_by_proximity_domain( return device; } +int kgd2kfd_create_sysfs_links(struct kfd_dev *kfd) +{ + struct kfd_topology_device *top_dev; + int ret = -ENODEV; + + if (!kfd) + return -EINVAL; + + down_read(&topology_lock); + + list_for_each_entry(top_dev, &topology_device_list, list) { + struct kobject *amdgpu_kobj; + + if (!top_dev->gpu || top_dev->gpu->kfd != kfd || !top_dev->kobj_node) + continue; + + amdgpu_kobj = &top_dev->gpu->adev->dev->kobj; + ret = sysfs_create_link(top_dev->kobj_node, amdgpu_kobj, "device"); + if (ret) + break; + + ret = sysfs_create_link(amdgpu_kobj, top_dev->kobj_node, "kfd"); + if (ret) + sysfs_remove_link(top_dev->kobj_node, "device"); + break; + } + + up_read(&topology_lock); + return ret; +} + struct kfd_topology_device *kfd_topology_device_by_id(uint32_t gpu_id) { struct kfd_topology_device *top_dev = NULL; @@ -571,6 +602,11 @@ static void kfd_remove_sysfs_node_entry(struct kfd_topology_device *dev) struct kfd_mem_properties *mem; struct kfd_perf_properties *perf; + if (dev->gpu) { + sysfs_remove_link(dev->kobj_node, "device"); + sysfs_remove_link(&dev->gpu->adev->dev->kobj, "kfd"); + } + if (dev->kobj_iolink) { list_for_each_entry(iolink, &dev->io_link_props, list) if (iolink->kobj) { diff --git a/drivers/gpu/drm/amd/include/kgd_kfd_interface.h b/drivers/gpu/drm/amd/include/kgd_kfd_interface.h index 9aba8596faa7e..f6db1dc634399 100644 --- a/drivers/gpu/drm/amd/include/kgd_kfd_interface.h +++ b/drivers/gpu/drm/amd/include/kgd_kfd_interface.h @@ -335,4 +335,6 @@ struct kfd2kgd_calls { int engine, int queue); }; +int kgd2kfd_create_sysfs_links(struct kfd_dev *kfd); + #endif /* KGD_KFD_INTERFACE_H_INCLUDED */ -- 2.43.0