From patchwork Tue Apr 25 18:20:51 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Roesch X-Patchwork-Id: 13223663 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 DF816C6FD18 for ; Tue, 25 Apr 2023 18:21:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231200AbjDYSVT (ORCPT ); Tue, 25 Apr 2023 14:21:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36508 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231391AbjDYSVS (ORCPT ); Tue, 25 Apr 2023 14:21:18 -0400 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 5041A7D85 for ; Tue, 25 Apr 2023 11:21:17 -0700 (PDT) Received: by devbig1114.prn1.facebook.com (Postfix, from userid 425415) id A2656442EFC0; Tue, 25 Apr 2023 11:21:02 -0700 (PDT) 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 v9 1/4] liburing: add api to set napi busy poll settings Date: Tue, 25 Apr 2023 11:20:51 -0700 Message-Id: <20230425182054.2826621-2-shr@devkernel.io> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230425182054.2826621-1-shr@devkernel.io> References: <20230425182054.2826621-1-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 Reviewed-by: Ammar Faizi --- src/include/liburing.h | 3 +++ src/include/liburing/io_uring.h | 12 ++++++++++++ src/liburing-ffi.map | 2 ++ src/liburing.map | 2 ++ src/register.c | 12 ++++++++++++ 5 files changed, 31 insertions(+) diff --git a/src/include/liburing.h b/src/include/liburing.h index 70c1774..add17a0 100644 --- a/src/include/liburing.h +++ b/src/include/liburing.h @@ -241,6 +241,9 @@ 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 3d3a63b..0e6e0bd 100644 --- a/src/include/liburing/io_uring.h +++ b/src/include/liburing/io_uring.h @@ -523,6 +523,10 @@ 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, @@ -662,6 +666,14 @@ 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-ffi.map b/src/liburing-ffi.map index 0a5e12c..2d9ab9f 100644 --- a/src/liburing-ffi.map +++ b/src/liburing-ffi.map @@ -171,6 +171,8 @@ LIBURING_2.4 { io_uring_prep_msg_ring_fd; io_uring_prep_msg_ring_fd_alloc; io_uring_prep_sendto; + io_uring_register_napi; + io_uring_unregister_napi; local: *; }; diff --git a/src/liburing.map b/src/liburing.map index 3b37022..c775b61 100644 --- a/src/liburing.map +++ b/src/liburing.map @@ -79,4 +79,6 @@ LIBURING_2.4 { io_uring_register_restrictions; io_uring_setup_buf_ring; io_uring_free_buf_ring; + io_uring_register_napi; + io_uring_unregister_napi; } LIBURING_2.3; diff --git a/src/register.c b/src/register.c index a3fcc78..d494be7 100644 --- a/src/register.c +++ b/src/register.c @@ -337,3 +337,15 @@ int io_uring_register_file_alloc_range(struct io_uring *ring, return do_register(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); +}