From patchwork Wed Apr 3 00:20:40 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mina Almasry X-Patchwork-Id: 13614796 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 C3FB2CD1284 for ; Wed, 3 Apr 2024 00:21:11 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 82D3B11220F; Wed, 3 Apr 2024 00:21:08 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=google.com header.i=@google.com header.b="UmW0KnuZ"; 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 92BDF11220F for ; Wed, 3 Apr 2024 00:21:06 +0000 (UTC) Received: by mail-yw1-f202.google.com with SMTP id 00721157ae682-611e89cf3b5so95066987b3.3 for ; Tue, 02 Apr 2024 17:21:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1712103666; x=1712708466; 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=eXtxUBXD7iooLyZhC2sG2IzmQnskI70ikTtvKYSHue4=; b=UmW0KnuZM0/l71avWqLnqTdTeODo8MSe4bFNUx9poQ9vElGBbA+9y/21bNotCjCM0U Jdr1WVYgex6nBFHpm8eWvEyxW+X5IXh5PT62FJ840qZYYkpteti+Tw9DIBfo3IHQk3By 2aA2lRQKT3gXzsiXw4Ou2ECkrh51CPc6POXPpUGeOMN3pSOTrGs/VXvhz8taCNnei2cN lxq1L/AXHU0Ol1WM3o9TDkBfr0udbKzFe+dAsLzz+5Ppx1OvUpwh9AffZVaDCKUEGtC+ 2QVMMCXd4R+FfQhAS9jKfWvrihVGi7v9fpBlHwLtpybIq5O43biOCf85l1uwM64qJV7C lxoQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712103666; x=1712708466; 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=eXtxUBXD7iooLyZhC2sG2IzmQnskI70ikTtvKYSHue4=; b=gMsLL6wdU5JlDMha7BtP5aNZ71xBkRZy31WM8n79utleTR5rk1pEROi+nDlvgyMO9l mmJMfikM3O5EJDdifZ2bdjjPgYC3B7d7wSIcKB79pYBwF4h+XrGkHHxlKjVQ7ys7UffZ nRpgh344ghelkNmGCoakzwimC4NmndFX7zIUf+F8+O5HIvh9T9z/lhZ4/SpadTygtSlu byD+N3ZTHXIDK7L8HR7jrNMAOZi2fGThVcmgaOaeGfYhtT8pAxPrV7Ic1P58f4DyHFnE B88ws+lGvlIMrAsVXpbUT8vX8yEr50cj0nlAQBJAxoJIF5J/DhoCqsUIuqwPKYJSB5fB qkIg== X-Forwarded-Encrypted: i=1; AJvYcCWe9sydihIvHPhq6gcppZGd5c+EiT1gN1J61nG4yaNr4iHO1ROE8Kqk+SMsQA1CSflLg+adg4ZmIZnFMlD1rAIShOU6wOTO4GOTdlusga8c X-Gm-Message-State: AOJu0YyHfQ8IgsqJsY6YX7uwm60MBC0fKwKWz7O7xblEYQb/EZYF0ZFq KOhgnbspn8zBBKGlL0cg8uI+ydf3O90D1kszFLzIWb9kAsFso6tGZkf1QVu9Wto05wZWauGVKmt pkC0SdFoR9pv8UQFNb9PSrA== X-Google-Smtp-Source: AGHT+IHoaW+htRqZm8yPKrycRs7l5wFzQqTxKosjj/zq3wYGjjEBoSynJ7xr0b8IxFqU+0S52tGWH9KU7a/j6/BQOw== X-Received: from almasrymina.svl.corp.google.com ([2620:15c:2c4:200:1726:7620:90a1:78b9]) (user=almasrymina job=sendgmr) by 2002:a05:690c:a9d:b0:615:c92:d3ab with SMTP id ci29-20020a05690c0a9d00b006150c92d3abmr1126296ywb.4.1712103665733; Tue, 02 Apr 2024 17:21:05 -0700 (PDT) Date: Tue, 2 Apr 2024 17:20:40 -0700 In-Reply-To: <20240403002053.2376017-1-almasrymina@google.com> Mime-Version: 1.0 References: <20240403002053.2376017-1-almasrymina@google.com> X-Mailer: git-send-email 2.44.0.478.gd926399ef9-goog Message-ID: <20240403002053.2376017-4-almasrymina@google.com> Subject: [RFC PATCH net-next v8 03/14] 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-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 , Jonathan Corbet , Richard Henderson , Ivan Kokshaysky , Matt Turner , Thomas Bogendoerfer , "James E.J. Bottomley" , Helge Deller , Andreas Larsson , 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?= " , Amritha Nambiar , Maciej Fijalkowski , Alexander Mikhalitsyn , Kaiyuan Zhang , Christian Brauner , Simon Horman , David Howells , Florian Westphal , Yunsheng Lin , Kuniyuki Iwashima , Jens Axboe , Arseniy Krasnov , Aleksander Lobakin , Michael Lass , Jiri Pirko , Sebastian Andrzej Siewior , Lorenzo Bianconi , Richard Gobert , Sridhar Samudrala , Xuan Zhuo , Johannes Berg , Abel Wu , Breno Leitao , Pavel Begunkov , David Wei , Jason Gunthorpe , 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 76352dbd2be4..275d1faa87a6 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 @@ -457,6 +496,20 @@ 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 bb65ee840cda..c5b959a0ed6c 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, @@ -162,6 +180,7 @@ 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 8d8ace9ef87f..bbaaa1b36b5b 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, }, @@ -129,6 +141,13 @@ 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 4db40fd5b4a9..ca5a0983f283 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 7004b3399c2b..67711d29d0d4 100644 --- a/net/core/netdev-genl.c +++ b/net/core/netdev-genl.c @@ -674,6 +674,12 @@ 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 bb65ee840cda..c5b959a0ed6c 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, @@ -162,6 +180,7 @@ 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,