From patchwork Thu Apr 25 02:21:16 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hao Xiang X-Patchwork-Id: 13642790 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 AFB11C4345F for ; Thu, 25 Apr 2024 02:24:53 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rzolI-0000b1-Oo; Wed, 24 Apr 2024 22:23:02 -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 1rzolF-0000aV-DM for qemu-devel@nongnu.org; Wed, 24 Apr 2024 22:22:57 -0400 Received: from out-181.mta1.migadu.com ([95.215.58.181]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rzolC-0005fm-Nu for qemu-devel@nongnu.org; Wed, 24 Apr 2024 22:22:57 -0400 X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1714011773; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=0crJNuoW+nW3d0lLEukaZUR839qcrFK+o9JwkG0Mflg=; b=H84vlzX4x67rGXD6UaZWaGYvvHJqklyIf1Eov+2GgWitImODoNFhHfnqG7NWyBiuoJZYqr DGYBnIQ4P1fLuMJw3yxtWKkaIKCEwQGR/FQ+FOfjF7HsEyjnFTKeiYAt5Qh3Msdp0fpCas bgJK4OJCs9U4uWg1HQbCipgqvGxg6uk= From: Hao Xiang To: marcandre.lureau@redhat.com, peterx@redhat.com, farosas@suse.de, armbru@redhat.com, lvivier@redhat.com, qemu-devel@nongnu.org Cc: Hao Xiang , Bryan Zhang Subject: [PATCH v4 13/14] util/dsa: Add unit test coverage for Intel DSA task submission and completion. Date: Thu, 25 Apr 2024 02:21:16 +0000 Message-Id: <20240425022117.4035031-14-hao.xiang@linux.dev> In-Reply-To: <20240425022117.4035031-1-hao.xiang@linux.dev> References: <20240425022117.4035031-1-hao.xiang@linux.dev> MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT Received-SPF: pass client-ip=95.215.58.181; envelope-from=hao.xiang@linux.dev; helo=out-181.mta1.migadu.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, 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org * Test DSA start and stop path. * Test DSA configure and cleanup path. * Test DSA task submission and completion path. Signed-off-by: Bryan Zhang Signed-off-by: Hao Xiang --- tests/unit/meson.build | 6 + tests/unit/test-dsa.c | 499 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 505 insertions(+) create mode 100644 tests/unit/test-dsa.c diff --git a/tests/unit/meson.build b/tests/unit/meson.build index 26c109c968..1d4d48898b 100644 --- a/tests/unit/meson.build +++ b/tests/unit/meson.build @@ -49,6 +49,12 @@ tests = { 'test-interval-tree': [], } +if config_host_data.get('CONFIG_DSA_OPT') + tests += { + 'test-dsa': [], + } +endif + if have_system or have_tools tests += { 'test-qmp-event': [testqapi], diff --git a/tests/unit/test-dsa.c b/tests/unit/test-dsa.c new file mode 100644 index 0000000000..0f2092767d --- /dev/null +++ b/tests/unit/test-dsa.c @@ -0,0 +1,499 @@ +/* + * Test DSA functions. + * + * Copyright (c) 2023 Hao Xiang + * Copyright (c) 2023 Bryan Zhang + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, see . + */ +#include "qemu/osdep.h" +#include "qemu/host-utils.h" + +#include "qemu/cutils.h" +#include "qemu/memalign.h" +#include "qemu/dsa.h" + +/* + * TODO Communicate that DSA must be configured to support this batch size. + * TODO Alternatively, poke the DSA device to figure out batch size. + */ +#define batch_size 128 +#define page_size 4096 + +#define oversized_batch_size (batch_size + 1) +#define num_devices 2 +#define max_buffer_size (64 * 1024) + +/* TODO Make these not-hardcoded. */ +static const char *path1 = "/dev/dsa/wq4.0"; +static const char *path2 = "/dev/dsa/wq4.0 /dev/dsa/wq4.1"; + +static struct batch_task *task; + +/* A helper for running a single task and checking for correctness. */ +static void do_single_task(void) +{ + task = batch_task_init(batch_size); + char buf[page_size]; + char *ptr = buf; + + buffer_is_zero_dsa_batch_async(task, + (const void **)&ptr, + 1, + page_size); + g_assert(task->results[0] == buffer_is_zero(buf, page_size)); + + batch_task_destroy(task); +} + +static void test_single_zero(void) +{ + g_assert(!dsa_init(path1)); + dsa_start(); + + task = batch_task_init(batch_size); + + char buf[page_size]; + char *ptr = buf; + + memset(buf, 0x0, page_size); + buffer_is_zero_dsa_batch_async(task, + (const void **)&ptr, + 1, page_size); + g_assert(task->results[0]); + + batch_task_destroy(task); + + dsa_cleanup(); +} + +static void test_single_zero_async(void) +{ + test_single_zero(); +} + +static void test_single_nonzero(void) +{ + g_assert(!dsa_init(path1)); + dsa_start(); + + task = batch_task_init(batch_size); + + char buf[page_size]; + char *ptr = buf; + + memset(buf, 0x1, page_size); + buffer_is_zero_dsa_batch_async(task, + (const void **)&ptr, + 1, page_size); + g_assert(!task->results[0]); + + batch_task_destroy(task); + + dsa_cleanup(); +} + +static void test_single_nonzero_async(void) +{ + test_single_nonzero(); +} + +/* count == 0 should return quickly without calling into DSA. */ +static void test_zero_count_async(void) +{ + char buf[page_size]; + buffer_is_zero_dsa_batch_async(task, + (const void **)&buf, + 0, + page_size); +} + +static void test_null_task_async(void) +{ + if (g_test_subprocess()) { + g_assert(!dsa_init(path1)); + + char buf[page_size * batch_size]; + char *addrs[batch_size]; + for (int i = 0; i < batch_size; i++) { + addrs[i] = buf + (page_size * i); + } + + buffer_is_zero_dsa_batch_async(NULL, (const void **)addrs, + batch_size, + page_size); + } else { + g_test_trap_subprocess(NULL, 0, 0); + g_test_trap_assert_failed(); + } +} + +static void test_oversized_batch(void) +{ + g_assert(!dsa_init(path1)); + dsa_start(); + + task = batch_task_init(batch_size); + + char buf[page_size * oversized_batch_size]; + char *addrs[batch_size]; + for (int i = 0; i < oversized_batch_size; i++) { + addrs[i] = buf + (page_size * i); + } + + int ret = buffer_is_zero_dsa_batch_async(task, + (const void **)addrs, + oversized_batch_size, + page_size); + g_assert(ret != 0); + + batch_task_destroy(task); + + dsa_cleanup(); +} + +static void test_oversized_batch_async(void) +{ + test_oversized_batch(); +} + +static void test_zero_len_async(void) +{ + if (g_test_subprocess()) { + g_assert(!dsa_init(path1)); + + task = batch_task_init(batch_size); + + char buf[page_size]; + + buffer_is_zero_dsa_batch_async(task, + (const void **)&buf, + 1, + 0); + + batch_task_destroy(task); + } else { + g_test_trap_subprocess(NULL, 0, 0); + g_test_trap_assert_failed(); + } +} + +static void test_null_buf_async(void) +{ + if (g_test_subprocess()) { + g_assert(!dsa_init(path1)); + + task = batch_task_init(batch_size); + + buffer_is_zero_dsa_batch_async(task, NULL, 1, page_size); + + batch_task_destroy(task); + } else { + g_test_trap_subprocess(NULL, 0, 0); + g_test_trap_assert_failed(); + } +} + +static void test_batch(void) +{ + g_assert(!dsa_init(path1)); + dsa_start(); + + task = batch_task_init(batch_size); + + char buf[page_size * batch_size]; + char *addrs[batch_size]; + for (int i = 0; i < batch_size; i++) { + addrs[i] = buf + (page_size * i); + } + + /* + * Using whatever is on the stack is somewhat random. + * Manually set some pages to zero and some to nonzero. + */ + memset(buf + 0, 0, page_size * 10); + memset(buf + (10 * page_size), 0xff, page_size * 10); + + buffer_is_zero_dsa_batch_async(task, + (const void **)addrs, + batch_size, + page_size); + + bool is_zero; + for (int i = 0; i < batch_size; i++) { + is_zero = buffer_is_zero((const void *)&buf[page_size * i], page_size); + g_assert(task->results[i] == is_zero); + } + + batch_task_destroy(task); + + dsa_cleanup(); +} + +static void test_batch_async(void) +{ + test_batch(); +} + +static void test_page_fault(void) +{ + g_assert(!dsa_init(path1)); + dsa_start(); + + char *buf[2]; + int prot = PROT_READ | PROT_WRITE; + int flags = MAP_SHARED | MAP_ANON; + buf[0] = (char *)mmap(NULL, page_size * batch_size, prot, flags, -1, 0); + assert(buf[0] != MAP_FAILED); + buf[1] = (char *)malloc(page_size * batch_size); + assert(buf[1] != NULL); + + for (int j = 0; j < 2; j++) { + task = batch_task_init(batch_size); + + char *addrs[batch_size]; + for (int i = 0; i < batch_size; i++) { + addrs[i] = buf[j] + (page_size * i); + } + + buffer_is_zero_dsa_batch_async(task, + (const void **)addrs, + batch_size, + page_size); + + bool is_zero; + for (int i = 0; i < batch_size; i++) { + is_zero = buffer_is_zero((const void *)&buf[j][page_size * i], + page_size); + g_assert(task->results[i] == is_zero); + } + batch_task_destroy(task); + } + + assert(!munmap(buf[0], page_size * batch_size)); + free(buf[1]); + dsa_cleanup(); +} + +static void test_various_buffer_sizes(void) +{ + g_assert(!dsa_init(path1)); + dsa_start(); + + char *buf = malloc(max_buffer_size * batch_size); + char *addrs[batch_size]; + + for (int len = 16; len <= max_buffer_size; len *= 2) { + task = batch_task_init(batch_size); + + for (int i = 0; i < batch_size; i++) { + addrs[i] = buf + (len * i); + } + + buffer_is_zero_dsa_batch_async(task, + (const void **)addrs, + batch_size, + len); + + bool is_zero; + for (int j = 0; j < batch_size; j++) { + is_zero = buffer_is_zero((const void *)&buf[len * j], len); + g_assert(task->results[j] == is_zero); + } + + batch_task_destroy(task); + } + + free(buf); + + dsa_cleanup(); +} + +static void test_various_buffer_sizes_async(void) +{ + test_various_buffer_sizes(); +} + +static void test_double_start_stop(void) +{ + g_assert(!dsa_init(path1)); + /* Double start */ + dsa_start(); + dsa_start(); + g_assert(dsa_is_running()); + do_single_task(); + + /* Double stop */ + dsa_stop(); + g_assert(!dsa_is_running()); + dsa_stop(); + g_assert(!dsa_is_running()); + + /* Restart */ + dsa_start(); + g_assert(dsa_is_running()); + do_single_task(); + dsa_cleanup(); +} + +static void test_is_running(void) +{ + g_assert(!dsa_init(path1)); + + g_assert(!dsa_is_running()); + dsa_start(); + g_assert(dsa_is_running()); + dsa_stop(); + g_assert(!dsa_is_running()); + dsa_cleanup(); +} + +static void test_multiple_engines(void) +{ + g_assert(!dsa_init(path2)); + dsa_start(); + + struct batch_task *tasks[num_devices]; + char bufs[num_devices][page_size * batch_size]; + char *addrs[num_devices][batch_size]; + + /* + * This is a somewhat implementation-specific way + * of testing that the tasks have unique engines + * assigned to them. + */ + tasks[0] = batch_task_init(batch_size); + tasks[1] = batch_task_init(batch_size); + g_assert(tasks[0]->dsa_batch->device != tasks[1]->dsa_batch->device); + + for (int i = 0; i < num_devices; i++) { + for (int j = 0; j < batch_size; j++) { + addrs[i][j] = bufs[i] + (page_size * j); + } + + buffer_is_zero_dsa_batch_async(tasks[i], + (const void **)addrs[i], + batch_size, page_size); + + bool is_zero; + for (int j = 0; j < batch_size; j++) { + is_zero = buffer_is_zero((const void *)&bufs[i][page_size * j], + page_size); + g_assert(tasks[i]->results[j] == is_zero); + } + } + + batch_task_destroy(tasks[0]); + batch_task_destroy(tasks[1]); + + dsa_cleanup(); +} + +static void test_configure_dsa_twice(void) +{ + g_assert(!dsa_init(path2)); + g_assert(!dsa_init(path2)); + dsa_start(); + do_single_task(); + dsa_cleanup(); +} + +static void test_configure_dsa_bad_path(void) +{ + const char *bad_path = "/not/a/real/path"; + g_assert(dsa_init(bad_path)); +} + +static void test_cleanup_before_configure(void) +{ + dsa_cleanup(); + g_assert(!dsa_init(path2)); +} + +static void test_configure_dsa_num_devices(void) +{ + g_assert(!dsa_init(path1)); + dsa_start(); + + do_single_task(); + dsa_stop(); + dsa_cleanup(); +} + +static void test_cleanup_twice(void) +{ + g_assert(!dsa_init(path2)); + dsa_cleanup(); + dsa_cleanup(); + + g_assert(!dsa_init(path2)); + dsa_start(); + do_single_task(); + dsa_cleanup(); +} + +static int check_test_setup(void) +{ + const char *path[2] = {path1, path2}; + for (int i = 0; i < sizeof(path) / sizeof(char *); i++) { + if (dsa_init(path[i])) { + return -1; + } + dsa_cleanup(); + } + return 0; +} + +int main(int argc, char **argv) +{ + g_test_init(&argc, &argv, NULL); + + if (check_test_setup() != 0) { + /* + * This test requires extra setup. The current + * setup is not correct. Just skip this test + * for now. + */ + exit(0); + } + + if (num_devices > 1) { + g_test_add_func("/dsa/multiple_engines", test_multiple_engines); + } + + g_test_add_func("/dsa/async/batch", test_batch_async); + g_test_add_func("/dsa/async/various_buffer_sizes", + test_various_buffer_sizes_async); + g_test_add_func("/dsa/async/null_buf", test_null_buf_async); + g_test_add_func("/dsa/async/zero_len", test_zero_len_async); + g_test_add_func("/dsa/async/oversized_batch", test_oversized_batch_async); + g_test_add_func("/dsa/async/zero_count", test_zero_count_async); + g_test_add_func("/dsa/async/single_zero", test_single_zero_async); + g_test_add_func("/dsa/async/single_nonzero", test_single_nonzero_async); + g_test_add_func("/dsa/async/null_task", test_null_task_async); + g_test_add_func("/dsa/async/page_fault", test_page_fault); + + g_test_add_func("/dsa/double_start_stop", test_double_start_stop); + g_test_add_func("/dsa/is_running", test_is_running); + + g_test_add_func("/dsa/configure_dsa_twice", test_configure_dsa_twice); + g_test_add_func("/dsa/configure_dsa_bad_path", test_configure_dsa_bad_path); + g_test_add_func("/dsa/cleanup_before_configure", + test_cleanup_before_configure); + g_test_add_func("/dsa/configure_dsa_num_devices", + test_configure_dsa_num_devices); + g_test_add_func("/dsa/cleanup_twice", test_cleanup_twice); + + return g_test_run(); +}