From nobody Sun Nov 24 20:32:30 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=quarantine dis=none) header.from=bytedance.com ARC-Seal: i=1; a=rsa-sha256; t=1720734839; cv=none; d=zohomail.com; s=zohoarc; b=SMfjhq8YFIbw3eBNAjKKvRVJBJWPdXWC3cQSxGoGW7q/qUjtoZG+XcB1gu2M0AY2UJHKtpfquGh2d0IhdHv+aNwAJebHR1Skp9EsSwdVgtIWkpcitjHWqT2W7ewgfromBmb0Quya/EWPyfM8+xQQt//tYKHdDCpNwY6X4tYM21c= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1720734839; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=g36O2jlhRF6JWB+BcC9DsTu4cbuPShYgI3NtvZMuOF4=; b=cxhy7DUc4524VT0+yP4wMzpFPMibdqFpWjL27E6Nla2e8yVOwn1bMosGlUnziTz7Qy3hsTLgVqkPHRX8PGTppH3v38ROnzUWLKDTHfp6YM8efvIpHBaun4Z4S1xmly5iScoHGJub1fv1SebW2J9ZfKc1bjtOaivV2thX9erfDlQ= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=quarantine dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1720734839427206.56399493986964; Thu, 11 Jul 2024 14:53:59 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sS1ip-00046I-Te; Thu, 11 Jul 2024 17:53:03 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sS1in-0003wv-2X for qemu-devel@nongnu.org; Thu, 11 Jul 2024 17:53:01 -0400 Received: from mail-ot1-x336.google.com ([2607:f8b0:4864:20::336]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1sS1ij-0005Z2-5N for qemu-devel@nongnu.org; Thu, 11 Jul 2024 17:53:00 -0400 Received: by mail-ot1-x336.google.com with SMTP id 46e09a7af769-706dea920f3so708276a34.1 for ; Thu, 11 Jul 2024 14:52:56 -0700 (PDT) Received: from DY4X0N7X05.bytedance.net ([208.184.112.130]) by smtp.gmail.com with ESMTPSA id 46e09a7af769-7044ac2876dsm713125a34.2.2024.07.11.14.52.53 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Thu, 11 Jul 2024 14:52:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1720734775; x=1721339575; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=g36O2jlhRF6JWB+BcC9DsTu4cbuPShYgI3NtvZMuOF4=; b=cIdvR/IP9afshpESdtFB361N+tU7JJaPPhpLjjbT+bAf6kONPG+wuEf+rtKmNE3Ikp PnpqrcL89z2M4e7DQL24gs+4m76fUNcmnrKG2u8Tt2SKMGa0Bwc22v6B1J1YBHjX8NRW 6Iv//AkGl+MnkxPov88Xee+sL8pzQX7vqeGIKi0GjgfJ8iBcmI139fXxb0Jf6ofa1MB8 62XzTVkFeaY0r6SglSmQ4uO7OG23wiNXW9sqQotSFFWEsxAAVU7A8ZON5rJgtADvbUj/ g8YJdvAsZydQVHYcrrzAGzXXtrV1yRh4KzxSozX6A4Mdo7eqNYlETyT87Wvfx/XPzjou K+gw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1720734775; x=1721339575; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=g36O2jlhRF6JWB+BcC9DsTu4cbuPShYgI3NtvZMuOF4=; b=AgNJR8IMBwbOpCI1llfxYxbHh40C491uq8YR/Lpca+T9Nqg+z4NBOsd8y4j9jczd3S OETxTprL3El3YohlB+qTqaeAOb6723D8ILlr5x8HtjMyL/8/CGK0uKyN5ytnKwz1jr0S 9zsglYk5bxZtMdIBisws4EAUQa3G9R5Tm31ZbzPR/DOy+C19OqykOZ3ZHZFyeBrVC/Xp aywUi1rCmORZImoY2Pbj6/KDEzdBPYbK2He9Oqf1tVM+pBCuGC86NMA3ToiDZRMXahaD g+8nOlPQ9P5MGqiYPNNtbYZAf5FAaoNbrr0uojOD0v1IOIfD0VaJbMu6/kJ1Af6nU42H 78cg== X-Forwarded-Encrypted: i=1; AJvYcCUx3lU47QjTdXW5plxQgkdWS4OzFqD+tvhxQEiDYqhjEbnS+/L6niCWnoHRt1MdXLWSOyGLG7bSNjZhMmj1dAH5UwFa240= X-Gm-Message-State: AOJu0Yxr44OKOyJW18ZWLYPSI27Y/f6VZYfGQsdMz+9pOek6h6tYOoz6 HC8mbB9tU+wH47EvNFUtWq77049sEx5QEW7q5tfiPLHsidqUcHbRddWtkMvF56Gg5sjQPpI8c4a i2uc= X-Google-Smtp-Source: AGHT+IGPleItq9Gp5o2Ob4TLwKEyNHgk3mWYcyTg6L9hpiKMvWNil1MHaqSsKviTXe93LGLKGL6UiA== X-Received: by 2002:a05:6830:148:b0:704:4bb7:c99a with SMTP id 46e09a7af769-708b521adedmr523021a34.0.1720734775201; Thu, 11 Jul 2024 14:52:55 -0700 (PDT) From: Yichen Wang To: Paolo Bonzini , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= , Thomas Huth , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Peter Xu , Fabiano Rosas , Eric Blake , Markus Armbruster , "Michael S. Tsirkin" , Cornelia Huck , qemu-devel@nongnu.org Cc: "Hao Xiang" , "Liu, Yuan1" , "Shivam Kumar" , "Ho-Ren (Jack) Chuang" , "Yichen Wang" , Bryan Zhang Subject: [PATCH v5 03/13] util/dsa: Implement DSA device start and stop logic. Date: Thu, 11 Jul 2024 14:52:38 -0700 Message-Id: <20240711215244.19237-4-yichen.wang@bytedance.com> X-Mailer: git-send-email 2.39.3 (Apple Git-146) In-Reply-To: <20240711215244.19237-1-yichen.wang@bytedance.com> References: <20240711215244.19237-1-yichen.wang@bytedance.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::336; envelope-from=yichen.wang@bytedance.com; helo=mail-ot1-x336.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @bytedance.com) X-ZM-MESSAGEID: 1720734840735116600 Content-Type: text/plain; charset="utf-8" From: Hao Xiang * DSA device open and close. * DSA group contains multiple DSA devices. * DSA group configure/start/stop/clean. Signed-off-by: Hao Xiang Signed-off-by: Bryan Zhang Signed-off-by: Yichen Wang --- include/qemu/dsa.h | 86 +++++++++++++ util/dsa.c | 303 +++++++++++++++++++++++++++++++++++++++++++++ util/meson.build | 3 + 3 files changed, 392 insertions(+) create mode 100644 include/qemu/dsa.h create mode 100644 util/dsa.c diff --git a/include/qemu/dsa.h b/include/qemu/dsa.h new file mode 100644 index 0000000000..29b60654e9 --- /dev/null +++ b/include/qemu/dsa.h @@ -0,0 +1,86 @@ +/* + * Interface for using Intel Data Streaming Accelerator to offload certain + * background operations. + * + * Copyright (C) Bytedance Ltd. + * + * Authors: + * Hao Xiang + * Yichen Wang + * + * This work is licensed under the terms of the GNU GPL, version 2 or late= r. + * See the COPYING file in the top-level directory. + */ + +#ifndef QEMU_DSA_H +#define QEMU_DSA_H + +#include "qemu/error-report.h" +#include "qemu/thread.h" +#include "qemu/queue.h" + +#ifdef CONFIG_DSA_OPT + +#pragma GCC push_options +#pragma GCC target("enqcmd") + +#include +#include "x86intrin.h" + +/** + * @brief Initializes DSA devices. + * + * @param dsa_parameter A list of DSA device path from migration parameter. + * + * @return int Zero if successful, otherwise non zero. + */ +int qemu_dsa_init(const char *dsa_parameter, Error **errp); + +/** + * @brief Start logic to enable using DSA. + */ +void qemu_dsa_start(void); + +/** + * @brief Stop the device group and the completion thread. + */ +void qemu_dsa_stop(void); + +/** + * @brief Clean up system resources created for DSA offloading. + */ +void qemu_dsa_cleanup(void); + +/** + * @brief Check if DSA is running. + * + * @return True if DSA is running, otherwise false. + */ +bool qemu_dsa_is_running(void); + +#else + +static inline bool qemu_dsa_is_running(void) +{ + return false; +} + +static inline int qemu_dsa_init(const char *dsa_parameter, Error **errp) +{ + if (dsa_parameter !=3D NULL && strlen(dsa_parameter) !=3D 0) { + error_setg(errp, "DSA is not supported."); + return -1; + } + + return 0; +} + +static inline void qemu_dsa_start(void) {} + +static inline void qemu_dsa_stop(void) {} + +static inline void qemu_dsa_cleanup(void) {} + +#endif + +#endif diff --git a/util/dsa.c b/util/dsa.c new file mode 100644 index 0000000000..cdb0b9dda2 --- /dev/null +++ b/util/dsa.c @@ -0,0 +1,303 @@ +/* + * Use Intel Data Streaming Accelerator to offload certain background + * operations. + * + * Copyright (C) Bytedance Ltd. + * + * Authors: + * Hao Xiang + * Bryan Zhang + * Yichen Wang + * + * This work is licensed under the terms of the GNU GPL, version 2 or late= r. + * See the COPYING file in the top-level directory. + */ + +#include "qemu/osdep.h" +#include "qapi/error.h" +#include "qemu/queue.h" +#include "qemu/memalign.h" +#include "qemu/lockable.h" +#include "qemu/cutils.h" +#include "qemu/dsa.h" +#include "qemu/bswap.h" +#include "qemu/error-report.h" +#include "qemu/rcu.h" + +#pragma GCC push_options +#pragma GCC target("enqcmd") + +#include +#include "x86intrin.h" + +#define DSA_WQ_SIZE 4096 +#define MAX_DSA_DEVICES 16 + +typedef QSIMPLEQ_HEAD(dsa_task_queue, dsa_batch_task) dsa_task_queue; + +typedef struct { + void *work_queue; +} QemuDsaDevice; + +typedef struct { + QemuDsaDevice *dsa_devices; + int num_dsa_devices; + /* The index of the next DSA device to be used. */ + uint32_t device_allocator_index; + bool running; + QemuMutex task_queue_lock; + QemuCond task_queue_cond; + dsa_task_queue task_queue; +} QemuDsaDeviceGroup; + +uint64_t max_retry_count; +static QemuDsaDeviceGroup dsa_group; + + +/** + * @brief This function opens a DSA device's work queue and + * maps the DSA device memory into the current process. + * + * @param dsa_wq_path A pointer to the DSA device work queue's file path. + * @return A pointer to the mapped memory, or MAP_FAILED on failure. + */ +static void * +map_dsa_device(const char *dsa_wq_path) +{ + void *dsa_device; + int fd; + + fd =3D open(dsa_wq_path, O_RDWR); + if (fd < 0) { + error_report("Open %s failed with errno =3D %d.", + dsa_wq_path, errno); + return MAP_FAILED; + } + dsa_device =3D mmap(NULL, DSA_WQ_SIZE, PROT_WRITE, + MAP_SHARED | MAP_POPULATE, fd, 0); + close(fd); + if (dsa_device =3D=3D MAP_FAILED) { + error_report("mmap failed with errno =3D %d.", errno); + return MAP_FAILED; + } + return dsa_device; +} + +/** + * @brief Initializes a DSA device structure. + * + * @param instance A pointer to the DSA device. + * @param work_queue A pointer to the DSA work queue. + */ +static void +dsa_device_init(QemuDsaDevice *instance, + void *dsa_work_queue) +{ + instance->work_queue =3D dsa_work_queue; +} + +/** + * @brief Cleans up a DSA device structure. + * + * @param instance A pointer to the DSA device to cleanup. + */ +static void +dsa_device_cleanup(QemuDsaDevice *instance) +{ + if (instance->work_queue !=3D MAP_FAILED) { + munmap(instance->work_queue, DSA_WQ_SIZE); + } +} + +/** + * @brief Initializes a DSA device group. + * + * @param group A pointer to the DSA device group. + * @param dsa_parameter A list of DSA device path from are separated by sp= ace + * character migration parameter. Multiple DSA device path. + * + * @return Zero if successful, non-zero otherwise. + */ +static int +dsa_device_group_init(QemuDsaDeviceGroup *group, + const char *dsa_parameter, + Error **errp) +{ + if (dsa_parameter =3D=3D NULL || strlen(dsa_parameter) =3D=3D 0) { + return 0; + } + + int ret =3D 0; + char *local_dsa_parameter =3D g_strdup(dsa_parameter); + const char *dsa_path[MAX_DSA_DEVICES]; + int num_dsa_devices =3D 0; + char delim[2] =3D " "; + + char *current_dsa_path =3D strtok(local_dsa_parameter, delim); + + while (current_dsa_path !=3D NULL) { + dsa_path[num_dsa_devices++] =3D current_dsa_path; + if (num_dsa_devices =3D=3D MAX_DSA_DEVICES) { + break; + } + current_dsa_path =3D strtok(NULL, delim); + } + + group->dsa_devices =3D + g_new0(QemuDsaDevice, num_dsa_devices); + group->num_dsa_devices =3D num_dsa_devices; + group->device_allocator_index =3D 0; + + group->running =3D false; + qemu_mutex_init(&group->task_queue_lock); + qemu_cond_init(&group->task_queue_cond); + QSIMPLEQ_INIT(&group->task_queue); + + void *dsa_wq =3D MAP_FAILED; + for (int i =3D 0; i < num_dsa_devices; i++) { + dsa_wq =3D map_dsa_device(dsa_path[i]); + if (dsa_wq =3D=3D MAP_FAILED) { + error_setg(errp, "map_dsa_device failed MAP_FAILED."); + ret =3D -1; + goto exit; + } + dsa_device_init(&dsa_group.dsa_devices[i], dsa_wq); + } + +exit: + g_free(local_dsa_parameter); + return ret; +} + +/** + * @brief Starts a DSA device group. + * + * @param group A pointer to the DSA device group. + */ +static void +dsa_device_group_start(QemuDsaDeviceGroup *group) +{ + group->running =3D true; +} + +/** + * @brief Stops a DSA device group. + * + * @param group A pointer to the DSA device group. + */ +__attribute__((unused)) +static void +dsa_device_group_stop(QemuDsaDeviceGroup *group) +{ + group->running =3D false; +} + +/** + * @brief Cleans up a DSA device group. + * + * @param group A pointer to the DSA device group. + */ +static void +dsa_device_group_cleanup(QemuDsaDeviceGroup *group) +{ + if (!group->dsa_devices) { + return; + } + for (int i =3D 0; i < group->num_dsa_devices; i++) { + dsa_device_cleanup(&group->dsa_devices[i]); + } + g_free(group->dsa_devices); + group->dsa_devices =3D NULL; + + qemu_mutex_destroy(&group->task_queue_lock); + qemu_cond_destroy(&group->task_queue_cond); +} + +/** + * @brief Returns the next available DSA device in the group. + * + * @param group A pointer to the DSA device group. + * + * @return struct QemuDsaDevice* A pointer to the next available DSA device + * in the group. + */ +__attribute__((unused)) +static QemuDsaDevice * +dsa_device_group_get_next_device(QemuDsaDeviceGroup *group) +{ + if (group->num_dsa_devices =3D=3D 0) { + return NULL; + } + uint32_t current =3D qatomic_fetch_inc(&group->device_allocator_index); + current %=3D group->num_dsa_devices; + return &group->dsa_devices[current]; +} + +/** + * @brief Check if DSA is running. + * + * @return True if DSA is running, otherwise false. + */ +bool qemu_dsa_is_running(void) +{ + return false; +} + +static void +dsa_globals_init(void) +{ + max_retry_count =3D UINT64_MAX; +} + +/** + * @brief Initializes DSA devices. + * + * @param dsa_parameter A list of DSA device path from migration parameter. + * + * @return int Zero if successful, otherwise non zero. + */ +int qemu_dsa_init(const char *dsa_parameter, Error **errp) +{ + dsa_globals_init(); + + return dsa_device_group_init(&dsa_group, dsa_parameter, errp); +} + +/** + * @brief Start logic to enable using DSA. + * + */ +void qemu_dsa_start(void) +{ + if (dsa_group.num_dsa_devices =3D=3D 0) { + return; + } + if (dsa_group.running) { + return; + } + dsa_device_group_start(&dsa_group); +} + +/** + * @brief Stop the device group and the completion thread. + * + */ +void qemu_dsa_stop(void) +{ + QemuDsaDeviceGroup *group =3D &dsa_group; + + if (!group->running) { + return; + } +} + +/** + * @brief Clean up system resources created for DSA offloading. + * + */ +void qemu_dsa_cleanup(void) +{ + qemu_dsa_stop(); + dsa_device_group_cleanup(&dsa_group); +} + diff --git a/util/meson.build b/util/meson.build index 5d8bef9891..3360f62923 100644 --- a/util/meson.build +++ b/util/meson.build @@ -88,6 +88,9 @@ if have_block or have_ga endif if have_block util_ss.add(files('aio-wait.c')) + if config_host_data.get('CONFIG_DSA_OPT') + util_ss.add(files('dsa.c')) + endif util_ss.add(files('buffer.c')) util_ss.add(files('bufferiszero.c')) util_ss.add(files('hbitmap.c')) --=20 Yichen Wang