From patchwork Fri Feb 17 13:48:11 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Danilo Krummrich X-Patchwork-Id: 13144740 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 EC042C64EC4 for ; Fri, 17 Feb 2023 13:48:52 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6C73210EFF0; Fri, 17 Feb 2023 13:48:39 +0000 (UTC) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by gabe.freedesktop.org (Postfix) with ESMTPS id 9D55110EFED for ; Fri, 17 Feb 2023 13:48:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1676641710; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=eEmQDOQyU6gF5gMBW9RNpV/N/n3J9qaRJsJk6Xv6fHM=; b=GUrqjOgfwAgu3k3oX4nMZP/eFV/MK3U3EBvDmHLD2sRDl7hN12kDtQ3Eh+LZymrQRnjQE+ Bm13oyToTimNx7K5fSPfiAc47x2Tu0GwtLe1uY88GwIHWUZn4B2rxRTgdi/r07FgfcKvfL m4jNIDfKhzf3ddBDzf57zBk/G1GZ5i8= Received: from mail-ed1-f70.google.com (mail-ed1-f70.google.com [209.85.208.70]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_128_GCM_SHA256) id us-mta-653-2EY-SR3gNTKZ110S5PIoeA-1; Fri, 17 Feb 2023 08:48:29 -0500 X-MC-Unique: 2EY-SR3gNTKZ110S5PIoeA-1 Received: by mail-ed1-f70.google.com with SMTP id cn9-20020a0564020ca900b004a25d8d7593so1228545edb.0 for ; Fri, 17 Feb 2023 05:48:29 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=eEmQDOQyU6gF5gMBW9RNpV/N/n3J9qaRJsJk6Xv6fHM=; b=63jJQ/bGMEy336Gu/DzzMTBTWF+c3CVWPWIl7mq8JHMvEzRZyXl/Jr2BINHlhz0J/W /yj+htRcIqbpsIkXNDw0wMeYJZ5pryNHrbpB3cjy6pVtk//G5gZy0hit2c5vilFMFVaX e4qKV89dK3JuLLtbik28aCEghqBtbIKI49kD7EImM6FftCUzqS4Adiol3EmJa/bIoXGG fXvbsCI90nVqTmyE7+MXiWbVd5ckjTDjQs55qei/tSISy9ciamcrFyjLRt74kwHefpNm ryBo/51CvPT8FPweAZ7dqj7UEN3ce3QQyecAJOUhskyBl5mSIX6yS2SFWiEM3vbcxcx4 zIqQ== X-Gm-Message-State: AO0yUKXD/1e47xlHhTVx7NlLXQbYxqzwUrlMpn0ttfVCF3RYAAKjdZw/ yLWmbb01+dZJ+moCWckqkAUnRDL0IvKo+oRWr90T1VPHy0dkYaFVBD26yY68ElPKfTG0DRDJxcm xZOEoOawodNVO3RN4zxfaS3AoRYtY X-Received: by 2002:a17:906:5e45:b0:861:7a02:1046 with SMTP id b5-20020a1709065e4500b008617a021046mr9000407eju.37.1676641708465; Fri, 17 Feb 2023 05:48:28 -0800 (PST) X-Google-Smtp-Source: AK7set8cnsFQ2/2nbfdSQlY0qUbNsdNsHcvEXcTDgO7kDDv/fQR13lIJp0sfctJpGRYxNRgg25e5MA== X-Received: by 2002:a17:906:5e45:b0:861:7a02:1046 with SMTP id b5-20020a1709065e4500b008617a021046mr9000388eju.37.1676641708174; Fri, 17 Feb 2023 05:48:28 -0800 (PST) Received: from cassiopeiae.. ([2a02:810d:4b3f:de78:642:1aff:fe31:a19f]) by smtp.gmail.com with ESMTPSA id bt21-20020a170906b15500b008b13259093csm2165027ejb.107.2023.02.17.05.48.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 17 Feb 2023 05:48:27 -0800 (PST) From: Danilo Krummrich To: airlied@gmail.com, daniel@ffwll.ch, tzimmermann@suse.de, mripard@kernel.org, corbet@lwn.net, christian.koenig@amd.com, bskeggs@redhat.com, Liam.Howlett@oracle.com, matthew.brost@intel.com, boris.brezillon@collabora.com, alexdeucher@gmail.com, ogabbay@kernel.org, bagasdotme@gmail.com, willy@infradead.org, jason@jlekstrand.net Subject: [PATCH drm-next v2 07/16] drm/nouveau: new VM_BIND uapi interfaces Date: Fri, 17 Feb 2023 14:48:11 +0100 Message-Id: <20230217134820.14672-2-dakr@redhat.com> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230217134422.14116-1-dakr@redhat.com> References: <20230217134422.14116-1-dakr@redhat.com> MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-doc@vger.kernel.org, nouveau@lists.freedesktop.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-mm@kvack.org, Danilo Krummrich , Dave Airlie Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" This commit provides the interfaces for the new UAPI motivated by the Vulkan API. It allows user mode drivers (UMDs) to: 1) Initialize a GPU virtual address (VA) space via the new DRM_IOCTL_NOUVEAU_VM_INIT ioctl. UMDs can provide a kernel reserved VA area. 2) Bind and unbind GPU VA space mappings via the new DRM_IOCTL_NOUVEAU_VM_BIND ioctl. 3) Execute push buffers with the new DRM_IOCTL_NOUVEAU_EXEC ioctl. Both, DRM_IOCTL_NOUVEAU_VM_BIND and DRM_IOCTL_NOUVEAU_EXEC support asynchronous processing with DRM syncobjs as synchronization mechanism. The default DRM_IOCTL_NOUVEAU_VM_BIND is synchronous processing, DRM_IOCTL_NOUVEAU_EXEC supports asynchronous processing only. Co-authored-by: Dave Airlie Signed-off-by: Danilo Krummrich --- Documentation/gpu/driver-uapi.rst | 8 ++ include/uapi/drm/nouveau_drm.h | 220 ++++++++++++++++++++++++++++++ 2 files changed, 228 insertions(+) diff --git a/Documentation/gpu/driver-uapi.rst b/Documentation/gpu/driver-uapi.rst index 4411e6919a3d..9c7ca6e33a68 100644 --- a/Documentation/gpu/driver-uapi.rst +++ b/Documentation/gpu/driver-uapi.rst @@ -6,3 +6,11 @@ drm/i915 uAPI ============= .. kernel-doc:: include/uapi/drm/i915_drm.h + +drm/nouveau uAPI +================ + +VM_BIND / EXEC uAPI +------------------- + +.. kernel-doc:: include/uapi/drm/nouveau_drm.h diff --git a/include/uapi/drm/nouveau_drm.h b/include/uapi/drm/nouveau_drm.h index 853a327433d3..dbe0afbd858a 100644 --- a/include/uapi/drm/nouveau_drm.h +++ b/include/uapi/drm/nouveau_drm.h @@ -126,6 +126,220 @@ struct drm_nouveau_gem_cpu_fini { __u32 handle; }; +/** + * struct drm_nouveau_sync - sync object + * + * This structure serves as synchronization mechanism for (potentially) + * asynchronous operations such as EXEC or VM_BIND. + */ +struct drm_nouveau_sync { + /** + * @flags: the flags for a sync object + * + * The first 8 bits are used to determine the type of the sync object. + */ + __u32 flags; +#define DRM_NOUVEAU_SYNC_SYNCOBJ 0x0 +#define DRM_NOUVEAU_SYNC_TIMELINE_SYNCOBJ 0x1 +#define DRM_NOUVEAU_SYNC_TYPE_MASK 0xf + /** + * @handle: the handle of the sync object + */ + __u32 handle; + /** + * @timeline_value: + * + * The timeline point of the sync object in case the syncobj is of + * type DRM_NOUVEAU_SYNC_TIMELINE_SYNCOBJ. + */ + __u64 timeline_value; +}; + +/** + * struct drm_nouveau_vm_init - GPU VA space init structure + * + * Used to initialize the GPU's VA space for a user client, telling the kernel + * which portion of the VA space is managed by the UMD and kernel respectively. + */ +struct drm_nouveau_vm_init { + /** + * @unmanaged_addr: start address of the kernel managed VA space region + */ + __u64 unmanaged_addr; + /** + * @unmanaged_size: size of the kernel managed VA space region in bytes + */ + __u64 unmanaged_size; +}; + +/** + * struct drm_nouveau_vm_bind_op - VM_BIND operation + * + * This structure represents a single VM_BIND operation. UMDs should pass + * an array of this structure via struct drm_nouveau_vm_bind's &op_ptr field. + */ +struct drm_nouveau_vm_bind_op { + /** + * @op: the operation type + */ + __u32 op; +/** + * @DRM_NOUVEAU_VM_BIND_OP_ALLOC: + * + * The alloc operation is used to reserve a VA space region within the GPU's VA + * space. Optionally, the &DRM_NOUVEAU_VM_BIND_SPARSE flag can be passed to + * instruct the kernel to create sparse mappings for the given region. + */ +#define DRM_NOUVEAU_VM_BIND_OP_ALLOC 0x0 +/** + * @DRM_NOUVEAU_VM_BIND_OP_FREE: Free a reserved VA space region. + */ +#define DRM_NOUVEAU_VM_BIND_OP_FREE 0x1 +/** + * @DRM_NOUVEAU_VM_BIND_OP_MAP: + * + * Map a GEM object to the GPU's VA space. The mapping must be fully enclosed by + * a previously allocated VA space region. If the region is sparse, existing + * sparse mappings are overwritten. + */ +#define DRM_NOUVEAU_VM_BIND_OP_MAP 0x2 +/** + * @DRM_NOUVEAU_VM_BIND_OP_UNMAP: + * + * Unmap an existing mapping in the GPU's VA space. If the region the mapping + * is located in is a sparse region, new sparse mappings are created where the + * unmapped (memory backed) mapping was mapped previously. + */ +#define DRM_NOUVEAU_VM_BIND_OP_UNMAP 0x3 + /** + * @flags: the flags for a &drm_nouveau_vm_bind_op + */ + __u32 flags; +/** + * @DRM_NOUVEAU_VM_BIND_SPARSE: + * + * Indicates that an allocated VA space region should be sparse. + */ +#define DRM_NOUVEAU_VM_BIND_SPARSE (1 << 8) + /** + * @handle: the handle of the DRM GEM object to map + */ + __u32 handle; + /** + * @pad: 32 bit padding, should be 0 + */ + __u32 pad; + /** + * @addr: + * + * the address the VA space region or (memory backed) mapping should be mapped to + */ + __u64 addr; + /** + * @bo_offset: the offset within the BO backing the mapping + */ + __u64 bo_offset; + /** + * @range: the size of the requested mapping in bytes + */ + __u64 range; +}; + +/** + * struct drm_nouveau_vm_bind - structure for DRM_IOCTL_NOUVEAU_VM_BIND + */ +struct drm_nouveau_vm_bind { + /** + * @op_count: the number of &drm_nouveau_vm_bind_op + */ + __u32 op_count; + /** + * @flags: the flags for a &drm_nouveau_vm_bind ioctl + */ + __u32 flags; +/** + * @DRM_NOUVEAU_VM_BIND_RUN_ASYNC: + * + * Indicates that the given VM_BIND operation should be executed asynchronously + * by the kernel. + * + * If this flag is not supplied the kernel executes the associated operations + * synchronously and doesn't accept any &drm_nouveau_sync objects. + */ +#define DRM_NOUVEAU_VM_BIND_RUN_ASYNC 0x1 + /** + * @wait_count: the number of wait &drm_nouveau_syncs + */ + __u32 wait_count; + /** + * @sig_count: the number of &drm_nouveau_syncs to signal when finished + */ + __u32 sig_count; + /** + * @wait_ptr: pointer to &drm_nouveau_syncs to wait for + */ + __u64 wait_ptr; + /** + * @sig_ptr: pointer to &drm_nouveau_syncs to signal when finished + */ + __u64 sig_ptr; + /** + * @op_ptr: pointer to the &drm_nouveau_vm_bind_ops to execute + */ + __u64 op_ptr; +}; + +/** + * struct drm_nouveau_exec_push - EXEC push operation + * + * This structure represents a single EXEC push operation. UMDs should pass an + * array of this structure via struct drm_nouveau_exec's &push_ptr field. + */ +struct drm_nouveau_exec_push { + /** + * @va: the virtual address of the push buffer mapping + */ + __u64 va; + /** + * @va_len: the length of the push buffer mapping + */ + __u64 va_len; +}; + +/** + * struct drm_nouveau_exec - structure for DRM_IOCTL_NOUVEAU_EXEC + */ +struct drm_nouveau_exec { + /** + * @channel: the channel to execute the push buffer in + */ + __u32 channel; + /** + * @push_count: the number of &drm_nouveau_exec_push ops + */ + __u32 push_count; + /** + * @wait_count: the number of wait &drm_nouveau_syncs + */ + __u32 wait_count; + /** + * @sig_count: the number of &drm_nouveau_syncs to signal when finished + */ + __u32 sig_count; + /** + * @wait_ptr: pointer to &drm_nouveau_syncs to wait for + */ + __u64 wait_ptr; + /** + * @sig_ptr: pointer to &drm_nouveau_syncs to signal when finished + */ + __u64 sig_ptr; + /** + * @push_ptr: pointer to &drm_nouveau_exec_push ops + */ + __u64 push_ptr; +}; + #define DRM_NOUVEAU_GETPARAM 0x00 /* deprecated */ #define DRM_NOUVEAU_SETPARAM 0x01 /* deprecated */ #define DRM_NOUVEAU_CHANNEL_ALLOC 0x02 /* deprecated */ @@ -136,6 +350,9 @@ struct drm_nouveau_gem_cpu_fini { #define DRM_NOUVEAU_NVIF 0x07 #define DRM_NOUVEAU_SVM_INIT 0x08 #define DRM_NOUVEAU_SVM_BIND 0x09 +#define DRM_NOUVEAU_VM_INIT 0x10 +#define DRM_NOUVEAU_VM_BIND 0x11 +#define DRM_NOUVEAU_EXEC 0x12 #define DRM_NOUVEAU_GEM_NEW 0x40 #define DRM_NOUVEAU_GEM_PUSHBUF 0x41 #define DRM_NOUVEAU_GEM_CPU_PREP 0x42 @@ -197,6 +414,9 @@ struct drm_nouveau_svm_bind { #define DRM_IOCTL_NOUVEAU_GEM_CPU_FINI DRM_IOW (DRM_COMMAND_BASE + DRM_NOUVEAU_GEM_CPU_FINI, struct drm_nouveau_gem_cpu_fini) #define DRM_IOCTL_NOUVEAU_GEM_INFO DRM_IOWR(DRM_COMMAND_BASE + DRM_NOUVEAU_GEM_INFO, struct drm_nouveau_gem_info) +#define DRM_IOCTL_NOUVEAU_VM_INIT DRM_IOWR(DRM_COMMAND_BASE + DRM_NOUVEAU_VM_INIT, struct drm_nouveau_vm_init) +#define DRM_IOCTL_NOUVEAU_VM_BIND DRM_IOWR(DRM_COMMAND_BASE + DRM_NOUVEAU_VM_BIND, struct drm_nouveau_vm_bind) +#define DRM_IOCTL_NOUVEAU_EXEC DRM_IOWR(DRM_COMMAND_BASE + DRM_NOUVEAU_EXEC, struct drm_nouveau_exec) #if defined(__cplusplus) } #endif