From patchwork Mon Jul 26 19:07:54 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vinay Belgaumkar X-Patchwork-Id: 12400677 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 92926C4338F for ; Mon, 26 Jul 2021 19:09:03 +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 5FFAE60238 for ; Mon, 26 Jul 2021 19:09:03 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 5FFAE60238 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 055B972C7C; Mon, 26 Jul 2021 19:09:03 +0000 (UTC) Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by gabe.freedesktop.org (Postfix) with ESMTPS id 9638D72C75; Mon, 26 Jul 2021 19:09:01 +0000 (UTC) X-IronPort-AV: E=McAfee;i="6200,9189,10057"; a="234162142" X-IronPort-AV: E=Sophos;i="5.84,270,1620716400"; d="scan'208";a="234162142" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Jul 2021 12:09:01 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.84,270,1620716400"; d="scan'208";a="566278247" Received: from vbelgaum-ubuntu.fm.intel.com ([10.1.27.27]) by orsmga004.jf.intel.com with ESMTP; 26 Jul 2021 12:09:01 -0700 From: Vinay Belgaumkar To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Date: Mon, 26 Jul 2021 12:07:54 -0700 Message-Id: <20210726190800.26762-10-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 Subject: [Intel-gfx] [PATCH 09/15] drm/i915/guc/slpc: Add get max/min freq hooks 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" Add helpers to read the min/max frequency being used by SLPC. This is done by send a H2G command which forces SLPC to update the shared data struct which can then be read. These helpers will be used in a sysfs patch later on. v2: Address review comments (Michal W) v3: Return err in case of query failure (Michal W) Signed-off-by: Vinay Belgaumkar Signed-off-by: Sundaresan Sujaritha Reviewed-by: Michal Wajdeczko --- drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c | 54 +++++++++++++++++++++ drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h | 2 + 2 files changed, 56 insertions(+) diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c index 63656640189c..c653bba3b5eb 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c @@ -306,6 +306,33 @@ int intel_guc_slpc_set_max_freq(struct intel_guc_slpc *slpc, u32 val) return ret; } +/** + * intel_guc_slpc_get_max_freq() - Get max frequency limit for SLPC. + * @slpc: pointer to intel_guc_slpc. + * @val: pointer to val which will hold max frequency (MHz) + * + * This function will invoke GuC SLPC action to read the max frequency + * limit for unslice. + * + * Return: 0 on success, non-zero error code on failure. + */ +int intel_guc_slpc_get_max_freq(struct intel_guc_slpc *slpc, u32 *val) +{ + struct drm_i915_private *i915 = slpc_to_i915(slpc); + intel_wakeref_t wakeref; + int ret = 0; + + with_intel_runtime_pm(&i915->runtime_pm, wakeref) { + /* Force GuC to update task data */ + ret = slpc_query_task_state(slpc); + + if (!ret) + *val = slpc_decode_max_freq(slpc); + } + + return ret; +} + /** * intel_guc_slpc_set_min_freq() - Set min frequency limit for SLPC. * @slpc: pointer to intel_guc_slpc. @@ -338,6 +365,33 @@ int intel_guc_slpc_set_min_freq(struct intel_guc_slpc *slpc, u32 val) return ret; } +/** + * intel_guc_slpc_get_min_freq() - Get min frequency limit for SLPC. + * @slpc: pointer to intel_guc_slpc. + * @val: pointer to val which will hold min frequency (MHz) + * + * This function will invoke GuC SLPC action to read the min frequency + * limit for unslice. + * + * Return: 0 on success, non-zero error code on failure. + */ +int intel_guc_slpc_get_min_freq(struct intel_guc_slpc *slpc, u32 *val) +{ + intel_wakeref_t wakeref; + struct drm_i915_private *i915 = guc_to_gt(slpc_to_guc(slpc))->i915; + int ret = 0; + + with_intel_runtime_pm(&i915->runtime_pm, wakeref) { + /* Force GuC to update task data */ + ret = slpc_query_task_state(slpc); + + if (!ret) + *val = slpc_decode_min_freq(slpc); + } + + return ret; +} + /* * intel_guc_slpc_enable() - Start SLPC * @slpc: pointer to intel_guc_slpc. diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h index e594510497ec..92d7afd44f07 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h @@ -31,5 +31,7 @@ int intel_guc_slpc_enable(struct intel_guc_slpc *slpc); void intel_guc_slpc_fini(struct intel_guc_slpc *slpc); int intel_guc_slpc_set_max_freq(struct intel_guc_slpc *slpc, u32 val); int intel_guc_slpc_set_min_freq(struct intel_guc_slpc *slpc, u32 val); +int intel_guc_slpc_get_max_freq(struct intel_guc_slpc *slpc, u32 *val); +int intel_guc_slpc_get_min_freq(struct intel_guc_slpc *slpc, u32 *val); #endif