From patchwork Sat Nov 19 04:11:10 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Roesch X-Patchwork-Id: 13049596 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 33D07C4167B for ; Sat, 19 Nov 2022 04:12:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233496AbiKSEMq (ORCPT ); Fri, 18 Nov 2022 23:12:46 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34632 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231189AbiKSEMM (ORCPT ); Fri, 18 Nov 2022 23:12:12 -0500 Received: from 66-220-144-178.mail-mxout.facebook.com (66-220-144-178.mail-mxout.facebook.com [66.220.144.178]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 26E039E978 for ; Fri, 18 Nov 2022 20:11:29 -0800 (PST) Received: by dev0134.prn3.facebook.com (Postfix, from userid 425415) id E56031956727; Fri, 18 Nov 2022 20:11:14 -0800 (PST) From: Stefan Roesch To: kernel-team@fb.com Cc: shr@devkernel.io, axboe@kernel.dk, olivier@trillion01.com, netdev@vger.kernel.org, io-uring@vger.kernel.org, kuba@kernel.org, ammarfaizi2@gnuweeb.org Subject: [RFC PATCH v4 1/4] liburing: add api to set napi busy poll settings Date: Fri, 18 Nov 2022 20:11:10 -0800 Message-Id: <20221119041113.146790-2-shr@devkernel.io> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20221119041113.146790-1-shr@devkernel.io> References: <20221119041113.146790-1-shr@devkernel.io> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org This adds two functions to manage the napi busy poll settings: - io_uring_register_napi - io_uring_unregister_napi Signed-off-by: Stefan Roesch --- src/include/liburing.h | 3 +++ src/include/liburing/io_uring.h | 12 ++++++++++++ src/liburing.map | 6 ++++++ src/register.c | 12 ++++++++++++ 4 files changed, 33 insertions(+) diff --git a/src/include/liburing.h b/src/include/liburing.h index 12a703f..98ffd73 100644 --- a/src/include/liburing.h +++ b/src/include/liburing.h @@ -235,6 +235,9 @@ int io_uring_register_sync_cancel(struct io_uring *ring, int io_uring_register_file_alloc_range(struct io_uring *ring, unsigned off, unsigned len); +int io_uring_register_napi(struct io_uring *ring, struct io_uring_napi *napi); +int io_uring_unregister_napi(struct io_uring *ring, struct io_uring_napi *napi); + int io_uring_get_events(struct io_uring *ring); int io_uring_submit_and_get_events(struct io_uring *ring); diff --git a/src/include/liburing/io_uring.h b/src/include/liburing/io_uring.h index a3e0920..25caee3 100644 --- a/src/include/liburing/io_uring.h +++ b/src/include/liburing/io_uring.h @@ -499,6 +499,10 @@ enum { /* register a range of fixed file slots for automatic slot allocation */ IORING_REGISTER_FILE_ALLOC_RANGE = 25, + /* set/clear busy poll settings */ + IORING_REGISTER_NAPI = 26, + IORING_UNREGISTER_NAPI = 27, + /* this goes last */ IORING_REGISTER_LAST }; @@ -621,6 +625,14 @@ struct io_uring_buf_reg { __u64 resv[3]; }; +/* argument for IORING_(UN)REGISTER_NAPI */ +struct io_uring_napi { + __u32 busy_poll_to; + __u8 prefer_busy_poll; + __u8 pad[3]; + __u64 resv; +}; + /* * io_uring_restriction->opcode values */ diff --git a/src/liburing.map b/src/liburing.map index 06c64f8..74036d3 100644 --- a/src/liburing.map +++ b/src/liburing.map @@ -67,3 +67,9 @@ LIBURING_2.3 { io_uring_get_events; io_uring_submit_and_get_events; } LIBURING_2.2; + +LIBURING_2.4 { + global: + io_uring_register_napi; + io_uring_unregister_napi; +} LIBURING_2.3; diff --git a/src/register.c b/src/register.c index e849825..9b363e0 100644 --- a/src/register.c +++ b/src/register.c @@ -367,3 +367,15 @@ int io_uring_register_file_alloc_range(struct io_uring *ring, IORING_REGISTER_FILE_ALLOC_RANGE, &range, 0); } + +int io_uring_register_napi(struct io_uring *ring, struct io_uring_napi *napi) +{ + return __sys_io_uring_register(ring->ring_fd, + IORING_REGISTER_NAPI, napi, 0); +} + +int io_uring_unregister_napi(struct io_uring *ring, struct io_uring_napi *napi) +{ + return __sys_io_uring_register(ring->ring_fd, + IORING_REGISTER_NAPI, napi, 0); +}