From patchwork Thu Jun 13 01:35:39 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mina Almasry X-Patchwork-Id: 13695723 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 37F84C27C79 for ; Thu, 13 Jun 2024 01:36:19 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id E347610E0E8; Thu, 13 Jun 2024 01:36:10 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=google.com header.i=@google.com header.b="BqWnbrDB"; dkim-atps=neutral Received: from mail-yw1-f202.google.com (mail-yw1-f202.google.com [209.85.128.202]) by gabe.freedesktop.org (Postfix) with ESMTPS id E140C10E043 for ; Thu, 13 Jun 2024 01:36:05 +0000 (UTC) Received: by mail-yw1-f202.google.com with SMTP id 00721157ae682-62f4a731ad4so9627577b3.1 for ; Wed, 12 Jun 2024 18:36:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1718242564; x=1718847364; darn=lists.freedesktop.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=N9Dn29au0+qPLs/80wzlHdbADmvvt55Ei9HbapqAsjk=; b=BqWnbrDBfWuBu72fjjMQWN2qamuubAmdTWqVDULpNx8sUD5adJNrUA9Y98AEypBU0h 3M+Cbma5QG5aFHkF7CBFIyKZHrQof7bQ3HqX5ZOYE37NtbI/vd7MP6yzl/RH51Mo/Obb oeFopX2O3YnbSMkuG+7+XJYgRVSZS/hnmQR/CzyC4wvwR8f7RYw8HQdTNwYQkeisRYq2 Gf/nheDHta0QJI3BJxJe0xDZQt0fClPEva24iL7mh+Jma+Mpptx3L+HQ6N+WI7mKgeUJ np/AKMDTGRU6j4FA6OiRZpbYnu9cHxR5V1kcIftX8kKWjXKSIDbJUM0euAnK4fPv6EXM Aa0g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1718242564; x=1718847364; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=N9Dn29au0+qPLs/80wzlHdbADmvvt55Ei9HbapqAsjk=; b=IqtpvvjPPdwNFBWADFY1EUX/2r0kgIvYCQbqkuoywW2H7e/ctvjQQ+1Ln/33oWsb7n k+IDPUnAYMzpOcc0H1M1jZBdjWl7MgVfzTb2Hd96VoD3EufoBOulNaE+0XNOO4P9mJxe Nj9e9I0lb0WIRsP1rmjMIjAERyiQ7GRpn1lw6HByfvDfet7bkXXlXxbB7cTmd94fELL0 g6XrGE6W7jfI8+rdvzIeH+3Zzn5aFZTMIH3dCwSTYx2EaVu/tQjR+UhXOjDBsppMHkox 2XPS9H3+JjFYPsv4eCysnigbGTRjayNww04B//jebFdEvFmRHFC2JBRhkzRxxkGhBeOy /lmA== X-Forwarded-Encrypted: i=1; AJvYcCVe1zq3h403wmDNjLAqZTJKecws/+ykOBZI5eDLPojfi7kpRlQ70rZ6sLwgdtz889cS0su4AciI3Kw/A5Waoiy9RNFJuPkXhw/6nQa7uE+5 X-Gm-Message-State: AOJu0YzE+Sa5reuoEktnS/AzbJayUiNjiQ0ZHK+SEYOHO4CQZVbHV5EA P0mKh5KUM7eKSbEjRQfcqPnXSXJ9CMZstxiVcml0yRhm8wAKLW33kJ8D84lCm2mH/UsHdHvDj7L qf9dYULTOyu+FgUnzbKA/2Q== X-Google-Smtp-Source: AGHT+IF94SVNrbTHeoIp2FY8sVnQqqn9i0oiamArSh19fvILKJ89RuWOaTiJnOSHNo9Ix4gcaHZ80xVxIllZKHJfBA== X-Received: from almasrymina.c.googlers.com ([fda3:e722:ac3:cc00:20:ed76:c0a8:4bc5]) (user=almasrymina job=sendgmr) by 2002:a05:6902:1008:b0:dfb:168d:c02e with SMTP id 3f1490d57ef6-dfe65f7687fmr222006276.3.1718242564147; Wed, 12 Jun 2024 18:36:04 -0700 (PDT) Date: Thu, 13 Jun 2024 01:35:39 +0000 In-Reply-To: <20240613013557.1169171-1-almasrymina@google.com> Mime-Version: 1.0 References: <20240613013557.1169171-1-almasrymina@google.com> X-Mailer: git-send-email 2.45.2.505.gda0bf45e8d-goog Message-ID: <20240613013557.1169171-3-almasrymina@google.com> Subject: [PATCH net-next v12 02/13] net: netdev netlink api to bind dma-buf to a net device From: Mina Almasry To: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-alpha@vger.kernel.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, sparclinux@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-arch@vger.kernel.org, bpf@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org Cc: Mina Almasry , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Donald Hunter , Jonathan Corbet , Richard Henderson , Ivan Kokshaysky , Matt Turner , Thomas Bogendoerfer , "James E.J. Bottomley" , Helge Deller , Andreas Larsson , Sergey Shtylyov , Jesper Dangaard Brouer , Ilias Apalodimas , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , Arnd Bergmann , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau , Eduard Zingerman , Song Liu , Yonghong Song , John Fastabend , KP Singh , Stanislav Fomichev , Hao Luo , Jiri Olsa , Steffen Klassert , Herbert Xu , David Ahern , Willem de Bruijn , Shuah Khan , Sumit Semwal , " =?utf-8?q?Christian_K=C3=B6nig?= " , Bagas Sanjaya , Christoph Hellwig , Nikolay Aleksandrov , Pavel Begunkov , David Wei , Jason Gunthorpe , Yunsheng Lin , Shailend Chand , Harshitha Ramamurthy , Shakeel Butt , Jeroen de Borst , Praveen Kaligineedi 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: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" API takes the dma-buf fd as input, and binds it to the netdevice. The user can specify the rx queues to bind the dma-buf to. Suggested-by: Stanislav Fomichev Signed-off-by: Mina Almasry --- v7: - Use flags: [ admin-perm ] instead of a CAP_NET_ADMIN check. Changes in v1: - Add rx-queue-type to distingish rx from tx (Jakub) - Return dma-buf ID from netlink API (David, Stan) Changes in RFC-v3: - Support binding multiple rx rx-queues --- Documentation/netlink/specs/netdev.yaml | 53 +++++++++++++++++++++++++ include/uapi/linux/netdev.h | 19 +++++++++ net/core/netdev-genl-gen.c | 19 +++++++++ net/core/netdev-genl-gen.h | 2 + net/core/netdev-genl.c | 6 +++ tools/include/uapi/linux/netdev.h | 19 +++++++++ 6 files changed, 118 insertions(+) diff --git a/Documentation/netlink/specs/netdev.yaml b/Documentation/netlink/specs/netdev.yaml index 959755be4d7f9..899ac0882a098 100644 --- a/Documentation/netlink/specs/netdev.yaml +++ b/Documentation/netlink/specs/netdev.yaml @@ -268,6 +268,45 @@ attribute-sets: name: napi-id doc: ID of the NAPI instance which services this queue. type: u32 + - + name: queue-dmabuf + attributes: + - + name: type + doc: rx or tx queue + type: u8 + enum: queue-type + - + name: idx + doc: queue index + type: u32 + + - + name: bind-dmabuf + attributes: + - + name: ifindex + doc: netdev ifindex to bind the dma-buf to. + type: u32 + checks: + min: 1 + - + name: queues + doc: receive queues to bind the dma-buf to. + type: nest + nested-attributes: queue-dmabuf + multi-attr: true + - + name: dmabuf-fd + doc: dmabuf file descriptor to bind. + type: u32 + - + name: dmabuf-id + doc: id of the dmabuf binding + type: u32 + checks: + min: 1 + - name: qstats @@ -579,6 +618,20 @@ operations: attributes: - ifindex reply: *queue-get-op + - + name: bind-rx + doc: Bind dmabuf to netdev + attribute-set: bind-dmabuf + flags: [ admin-perm ] + do: + request: + attributes: + - ifindex + - dmabuf-fd + - queues + reply: + attributes: + - dmabuf-id - name: napi-get doc: Get information about NAPI instances configured on the system. diff --git a/include/uapi/linux/netdev.h b/include/uapi/linux/netdev.h index 43742ac5b00da..190a504a62358 100644 --- a/include/uapi/linux/netdev.h +++ b/include/uapi/linux/netdev.h @@ -136,6 +136,24 @@ enum { NETDEV_A_QUEUE_MAX = (__NETDEV_A_QUEUE_MAX - 1) }; +enum { + NETDEV_A_QUEUE_DMABUF_TYPE = 1, + NETDEV_A_QUEUE_DMABUF_IDX, + + __NETDEV_A_QUEUE_DMABUF_MAX, + NETDEV_A_QUEUE_DMABUF_MAX = (__NETDEV_A_QUEUE_DMABUF_MAX - 1) +}; + +enum { + NETDEV_A_BIND_DMABUF_IFINDEX = 1, + NETDEV_A_BIND_DMABUF_QUEUES, + NETDEV_A_BIND_DMABUF_DMABUF_FD, + NETDEV_A_BIND_DMABUF_DMABUF_ID, + + __NETDEV_A_BIND_DMABUF_MAX, + NETDEV_A_BIND_DMABUF_MAX = (__NETDEV_A_BIND_DMABUF_MAX - 1) +}; + enum { NETDEV_A_QSTATS_IFINDEX = 1, NETDEV_A_QSTATS_QUEUE_TYPE, @@ -184,6 +202,7 @@ enum { NETDEV_CMD_PAGE_POOL_CHANGE_NTF, NETDEV_CMD_PAGE_POOL_STATS_GET, NETDEV_CMD_QUEUE_GET, + NETDEV_CMD_BIND_RX, NETDEV_CMD_NAPI_GET, NETDEV_CMD_QSTATS_GET, diff --git a/net/core/netdev-genl-gen.c b/net/core/netdev-genl-gen.c index 8350a0afa9ec7..9acd0d893765a 100644 --- a/net/core/netdev-genl-gen.c +++ b/net/core/netdev-genl-gen.c @@ -27,6 +27,11 @@ const struct nla_policy netdev_page_pool_info_nl_policy[NETDEV_A_PAGE_POOL_IFIND [NETDEV_A_PAGE_POOL_IFINDEX] = NLA_POLICY_FULL_RANGE(NLA_U32, &netdev_a_page_pool_ifindex_range), }; +const struct nla_policy netdev_queue_dmabuf_nl_policy[NETDEV_A_QUEUE_DMABUF_IDX + 1] = { + [NETDEV_A_QUEUE_DMABUF_TYPE] = NLA_POLICY_MAX(NLA_U8, 1), + [NETDEV_A_QUEUE_DMABUF_IDX] = { .type = NLA_U32, }, +}; + /* NETDEV_CMD_DEV_GET - do */ static const struct nla_policy netdev_dev_get_nl_policy[NETDEV_A_DEV_IFINDEX + 1] = { [NETDEV_A_DEV_IFINDEX] = NLA_POLICY_MIN(NLA_U32, 1), @@ -58,6 +63,13 @@ static const struct nla_policy netdev_queue_get_dump_nl_policy[NETDEV_A_QUEUE_IF [NETDEV_A_QUEUE_IFINDEX] = NLA_POLICY_MIN(NLA_U32, 1), }; +/* NETDEV_CMD_BIND_RX - do */ +static const struct nla_policy netdev_bind_rx_nl_policy[NETDEV_A_BIND_DMABUF_DMABUF_FD + 1] = { + [NETDEV_A_BIND_DMABUF_IFINDEX] = NLA_POLICY_MIN(NLA_U32, 1), + [NETDEV_A_BIND_DMABUF_DMABUF_FD] = { .type = NLA_U32, }, + [NETDEV_A_BIND_DMABUF_QUEUES] = NLA_POLICY_NESTED(netdev_queue_dmabuf_nl_policy), +}; + /* NETDEV_CMD_NAPI_GET - do */ static const struct nla_policy netdev_napi_get_do_nl_policy[NETDEV_A_NAPI_ID + 1] = { [NETDEV_A_NAPI_ID] = { .type = NLA_U32, }, @@ -130,6 +142,13 @@ static const struct genl_split_ops netdev_nl_ops[] = { .maxattr = NETDEV_A_QUEUE_IFINDEX, .flags = GENL_CMD_CAP_DUMP, }, + { + .cmd = NETDEV_CMD_BIND_RX, + .doit = netdev_nl_bind_rx_doit, + .policy = netdev_bind_rx_nl_policy, + .maxattr = NETDEV_A_BIND_DMABUF_DMABUF_FD, + .flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DO, + }, { .cmd = NETDEV_CMD_NAPI_GET, .doit = netdev_nl_napi_get_doit, diff --git a/net/core/netdev-genl-gen.h b/net/core/netdev-genl-gen.h index 4db40fd5b4a9e..ca5a0983f2834 100644 --- a/net/core/netdev-genl-gen.h +++ b/net/core/netdev-genl-gen.h @@ -13,6 +13,7 @@ /* Common nested types */ extern const struct nla_policy netdev_page_pool_info_nl_policy[NETDEV_A_PAGE_POOL_IFINDEX + 1]; +extern const struct nla_policy netdev_queue_dmabuf_nl_policy[NETDEV_A_QUEUE_DMABUF_IDX + 1]; int netdev_nl_dev_get_doit(struct sk_buff *skb, struct genl_info *info); int netdev_nl_dev_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb); @@ -26,6 +27,7 @@ int netdev_nl_page_pool_stats_get_dumpit(struct sk_buff *skb, int netdev_nl_queue_get_doit(struct sk_buff *skb, struct genl_info *info); int netdev_nl_queue_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb); +int netdev_nl_bind_rx_doit(struct sk_buff *skb, struct genl_info *info); int netdev_nl_napi_get_doit(struct sk_buff *skb, struct genl_info *info); int netdev_nl_napi_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb); int netdev_nl_qstats_get_dumpit(struct sk_buff *skb, diff --git a/net/core/netdev-genl.c b/net/core/netdev-genl.c index 1f6ae6379e0fc..e254503723626 100644 --- a/net/core/netdev-genl.c +++ b/net/core/netdev-genl.c @@ -721,6 +721,12 @@ int netdev_nl_qstats_get_dumpit(struct sk_buff *skb, return err; } +/* Stub */ +int netdev_nl_bind_rx_doit(struct sk_buff *skb, struct genl_info *info) +{ + return 0; +} + static int netdev_genl_netdevice_event(struct notifier_block *nb, unsigned long event, void *ptr) { diff --git a/tools/include/uapi/linux/netdev.h b/tools/include/uapi/linux/netdev.h index 43742ac5b00da..190a504a62358 100644 --- a/tools/include/uapi/linux/netdev.h +++ b/tools/include/uapi/linux/netdev.h @@ -136,6 +136,24 @@ enum { NETDEV_A_QUEUE_MAX = (__NETDEV_A_QUEUE_MAX - 1) }; +enum { + NETDEV_A_QUEUE_DMABUF_TYPE = 1, + NETDEV_A_QUEUE_DMABUF_IDX, + + __NETDEV_A_QUEUE_DMABUF_MAX, + NETDEV_A_QUEUE_DMABUF_MAX = (__NETDEV_A_QUEUE_DMABUF_MAX - 1) +}; + +enum { + NETDEV_A_BIND_DMABUF_IFINDEX = 1, + NETDEV_A_BIND_DMABUF_QUEUES, + NETDEV_A_BIND_DMABUF_DMABUF_FD, + NETDEV_A_BIND_DMABUF_DMABUF_ID, + + __NETDEV_A_BIND_DMABUF_MAX, + NETDEV_A_BIND_DMABUF_MAX = (__NETDEV_A_BIND_DMABUF_MAX - 1) +}; + enum { NETDEV_A_QSTATS_IFINDEX = 1, NETDEV_A_QSTATS_QUEUE_TYPE, @@ -184,6 +202,7 @@ enum { NETDEV_CMD_PAGE_POOL_CHANGE_NTF, NETDEV_CMD_PAGE_POOL_STATS_GET, NETDEV_CMD_QUEUE_GET, + NETDEV_CMD_BIND_RX, NETDEV_CMD_NAPI_GET, NETDEV_CMD_QSTATS_GET,