From patchwork Fri Feb 3 19:03:07 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Roesch X-Patchwork-Id: 13128279 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 50584C636CC for ; Fri, 3 Feb 2023 19:03:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233067AbjBCTDd (ORCPT ); Fri, 3 Feb 2023 14:03:33 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48260 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233005AbjBCTDc (ORCPT ); Fri, 3 Feb 2023 14:03:32 -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 DEECC1E1D1 for ; Fri, 3 Feb 2023 11:03:26 -0800 (PST) Received: by dev0134.prn3.facebook.com (Postfix, from userid 425415) id C72406329943; Fri, 3 Feb 2023 11:03:12 -0800 (PST) From: Stefan Roesch To: io-uring@vger.kernel.org, kernel-team@fb.com Cc: shr@devkernel.io, axboe@kernel.dk, ammarfaizi2@gnuweeb.org Subject: [PATCH v6 1/4] liburing: add api to set napi busy poll settings Date: Fri, 3 Feb 2023 11:03:07 -0800 Message-Id: <20230203190310.2900766-2-shr@devkernel.io> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230203190310.2900766-1-shr@devkernel.io> References: <20230203190310.2900766-1-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 | 3 +++ src/register.c | 12 ++++++++++++ 4 files changed, 30 insertions(+) diff --git a/src/include/liburing.h b/src/include/liburing.h index 1f91983..13546c4 100644 --- a/src/include/liburing.h +++ b/src/include/liburing.h @@ -240,6 +240,9 @@ 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 636a4c2..ab6c86e 100644 --- a/src/include/liburing/io_uring.h +++ b/src/include/liburing/io_uring.h @@ -518,6 +518,10 @@ 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 }; @@ -640,6 +644,14 @@ 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 1dbe765..013dc4a 100644 --- a/src/liburing.map +++ b/src/liburing.map @@ -76,4 +76,7 @@ LIBURING_2.4 { io_uring_enable_rings; io_uring_register_restrictions; + + io_uring_register_napi; + io_uring_unregister_napi; } LIBURING_2.3; diff --git a/src/register.c b/src/register.c index ac4c9e3..966839b 100644 --- a/src/register.c +++ b/src/register.c @@ -342,3 +342,15 @@ 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_UNREGISTER_NAPI, napi, 0); +}