From patchwork Mon Jul 26 19:07:59 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Vinay Belgaumkar X-Patchwork-Id: 12400721 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6A16CC4320A for ; Mon, 26 Jul 2021 19:09:26 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 2D4B260F6E for ; Mon, 26 Jul 2021 19:09:26 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 2D4B260F6E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id E5BF972ED1; Mon, 26 Jul 2021 19:09:24 +0000 (UTC) Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by gabe.freedesktop.org (Postfix) with ESMTPS id 06E0D72C96; Mon, 26 Jul 2021 19:09:23 +0000 (UTC) X-IronPort-AV: E=McAfee;i="6200,9189,10057"; a="212022563" X-IronPort-AV: E=Sophos;i="5.84,270,1620716400"; d="scan'208";a="212022563" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Jul 2021 12:09:22 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.84,270,1620716400"; d="scan'208";a="566278328" Received: from vbelgaum-ubuntu.fm.intel.com ([10.1.27.27]) by orsmga004.jf.intel.com with ESMTP; 26 Jul 2021 12:09:22 -0700 From: Vinay Belgaumkar To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Subject: [PATCH 14/15] drm/i915/guc/slpc: Add SLPC selftest Date: Mon, 26 Jul 2021 12:07:59 -0700 Message-Id: <20210726190800.26762-15-vinay.belgaumkar@intel.com> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20210726190800.26762-1-vinay.belgaumkar@intel.com> References: <20210726190800.26762-1-vinay.belgaumkar@intel.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Vinay Belgaumkar Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Tests that exercise the SLPC get/set frequency interfaces. Clamp_max will set max frequency to multiple levels and check that SLPC requests frequency lower than or equal to it. Clamp_min will set min frequency to different levels and check if SLPC requests are higher or equal to those levels. v2: Address review comments (Michal W) v3: Checkpatch() corrections Signed-off-by: Vinay Belgaumkar --- drivers/gpu/drm/i915/gt/intel_rps.c | 1 + drivers/gpu/drm/i915/gt/selftest_slpc.c | 311 ++++++++++++++++++ drivers/gpu/drm/i915/gt/selftest_slpc.h | 12 + .../drm/i915/selftests/i915_live_selftests.h | 1 + 4 files changed, 325 insertions(+) create mode 100644 drivers/gpu/drm/i915/gt/selftest_slpc.c create mode 100644 drivers/gpu/drm/i915/gt/selftest_slpc.h diff --git a/drivers/gpu/drm/i915/gt/intel_rps.c b/drivers/gpu/drm/i915/gt/intel_rps.c index 48d4147165a9..6237332835fe 100644 --- a/drivers/gpu/drm/i915/gt/intel_rps.c +++ b/drivers/gpu/drm/i915/gt/intel_rps.c @@ -2318,4 +2318,5 @@ EXPORT_SYMBOL_GPL(i915_gpu_turbo_disable); #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST) #include "selftest_rps.c" +#include "selftest_slpc.c" #endif diff --git a/drivers/gpu/drm/i915/gt/selftest_slpc.c b/drivers/gpu/drm/i915/gt/selftest_slpc.c new file mode 100644 index 000000000000..5018f686686f --- /dev/null +++ b/drivers/gpu/drm/i915/gt/selftest_slpc.c @@ -0,0 +1,311 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2021 Intel Corporation + */ + +#include "selftest_slpc.h" + +#define NUM_STEPS 5 +#define H2G_DELAY 50000 +#define delay_for_h2g() usleep_range(H2G_DELAY, H2G_DELAY + 10000) + +static int set_min_freq(struct intel_guc_slpc *slpc, u32 freq) +{ + int ret; + + ret = intel_guc_slpc_set_min_freq(slpc, freq); + if (ret) + pr_err("Could not set min frequency to [%u]\n", freq); + else /* Delay to ensure h2g completes */ + delay_for_h2g(); + + return ret; +} + +static int set_max_freq(struct intel_guc_slpc *slpc, u32 freq) +{ + int ret; + + ret = intel_guc_slpc_set_max_freq(slpc, freq); + if (ret) + pr_err("Could not set maximum frequency [%u]\n", + freq); + else /* Delay to ensure h2g completes */ + delay_for_h2g(); + + return ret; +} + +int live_slpc_clamp_min(void *arg) +{ + struct drm_i915_private *i915 = arg; + struct intel_gt *gt = &i915->gt; + struct intel_guc_slpc *slpc = >->uc.guc.slpc; + struct intel_rps *rps = >->rps; + struct intel_engine_cs *engine; + enum intel_engine_id id; + struct igt_spinner spin; + u32 slpc_min_freq, slpc_max_freq; + int err = 0; + + if (!intel_uc_uses_guc_slpc(>->uc)) + return 0; + + if (igt_spinner_init(&spin, gt)) + return -ENOMEM; + + if (intel_guc_slpc_get_max_freq(slpc, &slpc_max_freq)) { + pr_err("Could not get SLPC max freq\n"); + return -EIO; + } + + if (intel_guc_slpc_get_min_freq(slpc, &slpc_min_freq)) { + pr_err("Could not get SLPC min freq\n"); + return -EIO; + } + + if (slpc_min_freq == slpc_max_freq) { + pr_err("Min/Max are fused to the same value\n"); + return -EINVAL; + } + + intel_gt_pm_wait_for_idle(gt); + intel_gt_pm_get(gt); + for_each_engine(engine, gt, id) { + struct i915_request *rq; + u32 step, min_freq, req_freq; + u32 act_freq, max_act_freq; + + if (!intel_engine_can_store_dword(engine)) + continue; + + /* Go from min to max in 5 steps */ + step = (slpc_max_freq - slpc_min_freq) / NUM_STEPS; + max_act_freq = slpc_min_freq; + for (min_freq = slpc_min_freq; min_freq < slpc_max_freq; + min_freq += step) { + err = set_min_freq(slpc, min_freq); + if (err) + break; + + st_engine_heartbeat_disable(engine); + + rq = igt_spinner_create_request(&spin, + engine->kernel_context, + MI_NOOP); + if (IS_ERR(rq)) { + err = PTR_ERR(rq); + st_engine_heartbeat_enable(engine); + break; + } + + i915_request_add(rq); + + if (!igt_wait_for_spinner(&spin, rq)) { + pr_err("%s: Spinner did not start\n", + engine->name); + igt_spinner_end(&spin); + st_engine_heartbeat_enable(engine); + intel_gt_set_wedged(engine->gt); + err = -EIO; + break; + } + + /* Wait for GuC to detect business and raise + * requested frequency if necessary. + */ + delay_for_h2g(); + + req_freq = intel_rps_read_punit_req_frequency(rps); + + /* GuC requests freq in multiples of 50/3 MHz */ + if (req_freq < (min_freq - 50/3)) { + pr_err("SWReq is %d, should be at least %d\n", req_freq, + min_freq - 50/3); + igt_spinner_end(&spin); + st_engine_heartbeat_enable(engine); + err = -EINVAL; + break; + } + + act_freq = intel_rps_read_actual_frequency(rps); + if (act_freq > max_act_freq) + max_act_freq = act_freq; + + igt_spinner_end(&spin); + st_engine_heartbeat_enable(engine); + } + + pr_info("Max actual frequency for %s was %d\n", + engine->name, max_act_freq); + + /* Actual frequency should rise above min */ + if (max_act_freq == slpc_min_freq) { + pr_err("Actual freq did not rise above min\n"); + err = -EINVAL; + } + + if (err) + break; + } + + /* Restore min/max frequencies */ + set_max_freq(slpc, slpc_max_freq); + set_min_freq(slpc, slpc_min_freq); + + if (igt_flush_test(gt->i915)) + err = -EIO; + + intel_gt_pm_put(gt); + igt_spinner_fini(&spin); + intel_gt_pm_wait_for_idle(gt); + + return err; +} + +int live_slpc_clamp_max(void *arg) +{ + struct drm_i915_private *i915 = arg; + struct intel_gt *gt = &i915->gt; + struct intel_guc_slpc *slpc; + struct intel_rps *rps; + struct intel_engine_cs *engine; + enum intel_engine_id id; + struct igt_spinner spin; + int err = 0; + u32 slpc_min_freq, slpc_max_freq; + + slpc = >->uc.guc.slpc; + rps = >->rps; + + if (!intel_uc_uses_guc_slpc(>->uc)) + return 0; + + if (igt_spinner_init(&spin, gt)) + return -ENOMEM; + + if (intel_guc_slpc_get_max_freq(slpc, &slpc_max_freq)) { + pr_err("Could not get SLPC max freq\n"); + return -EIO; + } + + if (intel_guc_slpc_get_min_freq(slpc, &slpc_min_freq)) { + pr_err("Could not get SLPC min freq\n"); + return -EIO; + } + + if (slpc_min_freq == slpc_max_freq) { + pr_err("Min/Max are fused to the same value\n"); + return -EINVAL; + } + + intel_gt_pm_wait_for_idle(gt); + intel_gt_pm_get(gt); + for_each_engine(engine, gt, id) { + struct i915_request *rq; + u32 max_freq, req_freq; + u32 act_freq, max_act_freq; + u32 step; + + if (!intel_engine_can_store_dword(engine)) + continue; + + /* Go from max to min in 5 steps */ + step = (slpc_max_freq - slpc_min_freq) / NUM_STEPS; + max_act_freq = slpc_min_freq; + for (max_freq = slpc_max_freq; max_freq > slpc_min_freq; + max_freq -= step) { + err = set_max_freq(slpc, max_freq); + if (err) + break; + + st_engine_heartbeat_disable(engine); + + rq = igt_spinner_create_request(&spin, + engine->kernel_context, + MI_NOOP); + if (IS_ERR(rq)) { + st_engine_heartbeat_enable(engine); + err = PTR_ERR(rq); + break; + } + + i915_request_add(rq); + + if (!igt_wait_for_spinner(&spin, rq)) { + pr_err("%s: SLPC spinner did not start\n", + engine->name); + igt_spinner_end(&spin); + st_engine_heartbeat_enable(engine); + intel_gt_set_wedged(engine->gt); + err = -EIO; + break; + } + + delay_for_h2g(); + + /* Verify that SWREQ indeed was set to specific value */ + req_freq = intel_rps_read_punit_req_frequency(rps); + + /* GuC requests freq in multiples of 50/3 MHz */ + if (req_freq > (max_freq + 50/3)) { + pr_err("SWReq is %d, should be at most %d\n", req_freq, + max_freq + 50/3); + igt_spinner_end(&spin); + st_engine_heartbeat_enable(engine); + err = -EINVAL; + break; + } + + act_freq = intel_rps_read_actual_frequency(rps); + if (act_freq > max_act_freq) + max_act_freq = act_freq; + + st_engine_heartbeat_enable(engine); + igt_spinner_end(&spin); + + if (err) + break; + } + + pr_info("Max actual frequency for %s was %d\n", + engine->name, max_act_freq); + + /* Actual frequency should rise above min */ + if (max_act_freq == slpc_min_freq) { + pr_err("Actual freq did not rise above min\n"); + err = -EINVAL; + } + + if (igt_flush_test(gt->i915)) { + err = -EIO; + break; + } + + if (err) + break; + } + + /* Restore min/max freq */ + set_max_freq(slpc, slpc_max_freq); + set_min_freq(slpc, slpc_min_freq); + + intel_gt_pm_put(gt); + igt_spinner_fini(&spin); + intel_gt_pm_wait_for_idle(gt); + + return err; +} + +int intel_slpc_live_selftests(struct drm_i915_private *i915) +{ + static const struct i915_subtest tests[] = { + SUBTEST(live_slpc_clamp_max), + SUBTEST(live_slpc_clamp_min), + }; + + if (intel_gt_is_wedged(&i915->gt)) + return 0; + + return i915_live_subtests(tests, i915); +} diff --git a/drivers/gpu/drm/i915/gt/selftest_slpc.h b/drivers/gpu/drm/i915/gt/selftest_slpc.h new file mode 100644 index 000000000000..0480e62ed3d7 --- /dev/null +++ b/drivers/gpu/drm/i915/gt/selftest_slpc.h @@ -0,0 +1,12 @@ +/* SPDX-License-Identifier: MIT */ +/* + * Copyright © 2021 Intel Corporation + */ + +#ifndef SELFTEST_SLPC_H +#define SELFTEST_SLPC_H + +int live_slpc_clamp_max(void *arg); +int live_slpc_clamp_min(void *arg); + +#endif /* SELFTEST_SLPC_H */ diff --git a/drivers/gpu/drm/i915/selftests/i915_live_selftests.h b/drivers/gpu/drm/i915/selftests/i915_live_selftests.h index e2fd1b61af71..1746a56dda06 100644 --- a/drivers/gpu/drm/i915/selftests/i915_live_selftests.h +++ b/drivers/gpu/drm/i915/selftests/i915_live_selftests.h @@ -47,5 +47,6 @@ selftest(hangcheck, intel_hangcheck_live_selftests) selftest(execlists, intel_execlists_live_selftests) selftest(ring_submission, intel_ring_submission_live_selftests) selftest(perf, i915_perf_live_selftests) +selftest(slpc, intel_slpc_live_selftests) /* Here be dragons: keep last to run last! */ selftest(late_gt_pm, intel_gt_pm_late_selftests)