From patchwork Wed Apr 12 00:42:17 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Vinay Belgaumkar X-Patchwork-Id: 13208352 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 C992BC7619A for ; Wed, 12 Apr 2023 00:40:10 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id E8FA410E6DA; Wed, 12 Apr 2023 00:40:09 +0000 (UTC) Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by gabe.freedesktop.org (Postfix) with ESMTPS id CA7AE10E6DA; Wed, 12 Apr 2023 00:40:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1681260007; x=1712796007; h=from:to:subject:date:message-id:in-reply-to:references: mime-version:content-transfer-encoding; bh=6lucmuHQgo7/070O59wLD3I9lqeCHHgMKMZqrzSbiz8=; b=fmk0tQ5d7T/kYseraC2G05jhL+z5+r15yYtg9KnWSZdcU/DLrC6NLcVV rHptFnKSEYF9xamb9PZHP/rvQulvhfftME37nboGE9+Gl6TWUFUbvnrBx JF6K6BlmhXm0z46480PIuW2kVBwzC/cL4xppHNYgnt3TE3h5FrO28VGlZ roSvuuxAZb0ckv1F6U5UB3r+rKl4W03dht6wLLtOZlI2sLLpiyaVxH7yA LYepo2ZU0EOgUdb/FVClflOeRmujtg2w4z4s9xR6G1X5t1Dn4d9xmD26x a7dUL/6ZvI+CXmSyZOGxFJWprJ6H3Kh3VNNLeqkWgKyjrZEp4xcRlCVqv g==; X-IronPort-AV: E=McAfee;i="6600,9927,10677"; a="345557304" X-IronPort-AV: E=Sophos;i="5.98,336,1673942400"; d="scan'208";a="345557304" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Apr 2023 17:40:07 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10677"; a="719166933" X-IronPort-AV: E=Sophos;i="5.98,336,1673942400"; d="scan'208";a="719166933" Received: from vbelgaum-ubuntu.fm.intel.com ([10.1.27.27]) by orsmga008.jf.intel.com with ESMTP; 11 Apr 2023 17:40:07 -0700 From: Vinay Belgaumkar To: intel-gfx@lists.freedesktop.org, igt-dev@lists.freedesktop.org Date: Tue, 11 Apr 2023 17:42:17 -0700 Message-Id: <20230412004218.1634893-3-vinay.belgaumkar@intel.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20230412004218.1634893-1-vinay.belgaumkar@intel.com> References: <20230412004218.1634893-1-vinay.belgaumkar@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH i-g-t 2/3] i915_pm_freq_api: Add some basic SLPC igt tests X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Validate basic api for GT freq control. Also test interaction with GT reset. We skip rps tests with SLPC enabled, this will re-introduce some coverage. SLPC selftests are already covering some other workload related scenarios. v2: Rename test (Rodrigo) v3: Review comments (Ashutosh) Reviewed-by: Ashutosh Dixit Cc: Rodrigo Vivi Signed-off-by: Vinay Belgaumkar --- tests/i915/i915_pm_freq_api.c | 151 ++++++++++++++++++++++++++++++++++ tests/meson.build | 1 + 2 files changed, 152 insertions(+) create mode 100644 tests/i915/i915_pm_freq_api.c diff --git a/tests/i915/i915_pm_freq_api.c b/tests/i915/i915_pm_freq_api.c new file mode 100644 index 00000000..bfa90005 --- /dev/null +++ b/tests/i915/i915_pm_freq_api.c @@ -0,0 +1,151 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2023 Intel Corporation + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "drmtest.h" +#include "i915/gem.h" +#include "igt_sysfs.h" +#include "igt.h" + +IGT_TEST_DESCRIPTION("Test SLPC freq API"); +/* + * Too many intermediate components and steps before freq is adjusted + * Specially if workload is under execution, so let's wait 100 ms. + */ +#define ACT_FREQ_LATENCY_US 100000 + +static uint32_t get_freq(int dirfd, uint8_t id) +{ + uint32_t val; + + igt_assert(igt_sysfs_rps_scanf(dirfd, id, "%u", &val) == 1); + + return val; +} + +static int set_freq(int dirfd, uint8_t id, uint32_t val) +{ + return igt_sysfs_rps_printf(dirfd, id, "%u", val); +} + +static void test_freq_basic_api(int dirfd, int gt) +{ + uint32_t rpn, rp0, rpe; + + /* Save frequencies */ + rpn = get_freq(dirfd, RPS_RPn_FREQ_MHZ); + rp0 = get_freq(dirfd, RPS_RP0_FREQ_MHZ); + rpe = get_freq(dirfd, RPS_RP1_FREQ_MHZ); + igt_info("System min freq: %dMHz; max freq: %dMHz\n", rpn, rp0); + + /* + * Negative bound tests + * RPn is the floor + * RP0 is the ceiling + */ + igt_assert(set_freq(dirfd, RPS_MIN_FREQ_MHZ, rpn - 1) < 0); + igt_assert(set_freq(dirfd, RPS_MIN_FREQ_MHZ, rp0 + 1) < 0); + igt_assert(set_freq(dirfd, RPS_MAX_FREQ_MHZ, rpn - 1) < 0); + igt_assert(set_freq(dirfd, RPS_MAX_FREQ_MHZ, rp0 + 1) < 0); + + /* Assert min requests are respected from rp0 to rpn */ + igt_assert(set_freq(dirfd, RPS_MIN_FREQ_MHZ, rp0) > 0); + igt_assert(get_freq(dirfd, RPS_MIN_FREQ_MHZ) == rp0); + igt_assert(set_freq(dirfd, RPS_MIN_FREQ_MHZ, rpe) > 0); + igt_assert(get_freq(dirfd, RPS_MIN_FREQ_MHZ) == rpe); + igt_assert(set_freq(dirfd, RPS_MIN_FREQ_MHZ, rpn) > 0); + igt_assert(get_freq(dirfd, RPS_MIN_FREQ_MHZ) == rpn); + + /* Assert max requests are respected from rpn to rp0 */ + igt_assert(set_freq(dirfd, RPS_MAX_FREQ_MHZ, rpn) > 0); + igt_assert(get_freq(dirfd, RPS_MAX_FREQ_MHZ) == rpn); + igt_assert(set_freq(dirfd, RPS_MAX_FREQ_MHZ, rpe) > 0); + igt_assert(get_freq(dirfd, RPS_MAX_FREQ_MHZ) == rpe); + igt_assert(set_freq(dirfd, RPS_MAX_FREQ_MHZ, rp0) > 0); + igt_assert(get_freq(dirfd, RPS_MAX_FREQ_MHZ) == rp0); + +} + +static void test_reset(int i915, int dirfd, int gt) +{ + uint32_t rpn = get_freq(dirfd, RPS_RPn_FREQ_MHZ); + int fd; + + igt_assert(set_freq(dirfd, RPS_MIN_FREQ_MHZ, rpn) > 0); + igt_assert(set_freq(dirfd, RPS_MAX_FREQ_MHZ, rpn) > 0); + usleep(ACT_FREQ_LATENCY_US); + igt_assert(get_freq(dirfd, RPS_MIN_FREQ_MHZ) == rpn); + + /* Manually trigger a GT reset */ + fd = igt_debugfs_gt_open(i915, gt, "reset", O_WRONLY); + igt_require(fd >= 0); + igt_ignore_warn(write(fd, "1\n", 2)); + close(fd); + + igt_assert(get_freq(dirfd, RPS_MIN_FREQ_MHZ) == rpn); + igt_assert(get_freq(dirfd, RPS_MAX_FREQ_MHZ) == rpn); +} + +igt_main +{ + int i915 = -1; + uint32_t *stash_min, *stash_max; + + igt_fixture { + int num_gts, dirfd, gt; + + i915 = drm_open_driver(DRIVER_INTEL); + igt_require_gem(i915); + /* i915_pm_rps already covers execlist path */ + igt_require(gem_using_guc_submission(i915)); + + num_gts = igt_sysfs_get_num_gt(i915); + stash_min = (uint32_t*)malloc(sizeof(uint32_t) * num_gts); + stash_max = (uint32_t*)malloc(sizeof(uint32_t) * num_gts); + + /* Save curr min and max across GTs */ + for_each_sysfs_gt_dirfd(i915, dirfd, gt) { + stash_min[gt] = get_freq(dirfd, RPS_MIN_FREQ_MHZ); + stash_max[gt] = get_freq(dirfd, RPS_MAX_FREQ_MHZ); + } + } + + igt_describe("Test basic API for controlling min/max GT frequency"); + igt_subtest_with_dynamic_f("freq-basic-api") { + int dirfd, gt; + + for_each_sysfs_gt_dirfd(i915, dirfd, gt) + igt_dynamic_f("gt%u", gt) + test_freq_basic_api(dirfd, gt); + } + + igt_describe("Test basic freq API works after a reset"); + igt_subtest_with_dynamic_f("freq-reset") { + int dirfd, gt; + + for_each_sysfs_gt_dirfd(i915, dirfd, gt) + igt_dynamic_f("gt%u", gt) + test_reset(i915, dirfd, gt); + } + + igt_fixture { + int dirfd, gt; + /* Restore frequencies */ + for_each_sysfs_gt_dirfd(i915, dirfd, gt) { + igt_assert(set_freq(dirfd, RPS_MAX_FREQ_MHZ, stash_max[gt]) > 0); + igt_assert(set_freq(dirfd, RPS_MIN_FREQ_MHZ, stash_min[gt]) > 0); + } + close(i915); + } +} diff --git a/tests/meson.build b/tests/meson.build index da31e782..46109f10 100644 --- a/tests/meson.build +++ b/tests/meson.build @@ -202,6 +202,7 @@ i915_progs = [ 'gem_workarounds', 'i915_fb_tiling', 'i915_getparams_basic', + 'i915_pm_freq_api', 'i915_hangman', 'i915_hwmon', 'i915_module_load',