From patchwork Wed Mar 8 07:06:40 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: srinivas pandruvada X-Patchwork-Id: 13165303 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 972C8C74A44 for ; Wed, 8 Mar 2023 07:07:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229590AbjCHHHA (ORCPT ); Wed, 8 Mar 2023 02:07:00 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53976 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229846AbjCHHGy (ORCPT ); Wed, 8 Mar 2023 02:06:54 -0500 Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 65C38A2F37; Tue, 7 Mar 2023 23:06:47 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1678259207; x=1709795207; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=DB5Y6DApORxnvwCMX80Ms32ZTNNF+wlOEuhY2BLU+Jg=; b=mu1jVC2wLv7pkt797li8hszBdlvF/VE2txntZ4gnzf54Pe9H5xtc/Bzd qh6PapM5GBPkDNtnL6NGpXc+1jfKvGs7AgYGOXuVsSa51sk3wp66/bW/B 27IOLIWBUvrlZtVvfjPh/68bHcDFjiF8AjTpzcviB6pb45qU8xWAkwY9L HdIEvj5t0fOCXHjL3QS8y0Z0QJuq2yCPgUeB703zQ3KtaiDgTA4EMXvGX 0StTOCsvdOXnBD4sMNK3vo6hPGnlO1nwsas7KyMl4T7mLNoXQDP+ZzC7i HSZyjG3FODlqfLmmqApThkbcRk0wCQtBLfed1htK5vvzTO/i624iNOy3k w==; X-IronPort-AV: E=McAfee;i="6500,9779,10642"; a="333553985" X-IronPort-AV: E=Sophos;i="5.98,243,1673942400"; d="scan'208";a="333553985" Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Mar 2023 23:06:45 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6500,9779,10642"; a="850986392" X-IronPort-AV: E=Sophos;i="5.98,243,1673942400"; d="scan'208";a="850986392" Received: from spandruv-desk.jf.intel.com ([10.54.75.8]) by orsmga005.jf.intel.com with ESMTP; 07 Mar 2023 23:06:44 -0800 From: Srinivas Pandruvada To: hdegoede@redhat.com, markgross@kernel.org Cc: platform-driver-x86@vger.kernel.org, linux-kernel@vger.kernel.org, Srinivas Pandruvada , Zhang Rui , Pragya Tanwar Subject: [PATCH v2 6/8] platform/x86: ISST: Add SST-BF support via TPMI Date: Tue, 7 Mar 2023 23:06:40 -0800 Message-Id: <20230308070642.1727167-7-srinivas.pandruvada@linux.intel.com> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230308070642.1727167-1-srinivas.pandruvada@linux.intel.com> References: <20230308070642.1727167-1-srinivas.pandruvada@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: platform-driver-x86@vger.kernel.org The Intel Speed Select Technology - Base Frequency (SST-BF) feature lets the user control base frequency. If some critical workload threads demand constant high guaranteed performance, then this feature can be used to execute the thread at higher base frequency on specific sets of CPUs (high priority CPUs) at the cost of lower base frequency (low priority CPUs) on other CPUs. Two new IOCTLs are added: ISST_IF_GET_BASE_FREQ_INFO : Get frequency information for high and low priority CPUs ISST_IF_GET_BASE_FREQ_CPU_MASK : CPUs capable of higher frequency Once an instance is identified, read or write from correct MMIO offset for a given field as defined in the specification. For details on SST-BF operations using intel-speed-selet utility, refer to: Documentation/admin-guide/pm/intel-speed-select.rst under the kernel documentation Signed-off-by: Srinivas Pandruvada Reviewed-by: Zhang Rui Tested-by: Pragya Tanwar --- v2: No change .../intel/speed_select_if/isst_tpmi_core.c | 87 +++++++++++++++++++ 1 file changed, 87 insertions(+) diff --git a/drivers/platform/x86/intel/speed_select_if/isst_tpmi_core.c b/drivers/platform/x86/intel/speed_select_if/isst_tpmi_core.c index c9b1321dfd1b..0566c8d30181 100644 --- a/drivers/platform/x86/intel/speed_select_if/isst_tpmi_core.c +++ b/drivers/platform/x86/intel/speed_select_if/isst_tpmi_core.c @@ -1014,6 +1014,87 @@ static int isst_if_get_perf_level_mask(void __user *argp) return 0; } +#define SST_BF_INFO_0_OFFSET 0 +#define SST_BF_INFO_1_OFFSET 8 + +#define SST_BF_P1_HIGH_START 13 +#define SST_BF_P1_HIGH_WIDTH 8 + +#define SST_BF_P1_LOW_START 21 +#define SST_BF_P1_LOW_WIDTH 8 + +#define SST_BF_T_PROHOT_START 38 +#define SST_BF_T_PROHOT_WIDTH 8 + +#define SST_BF_TDP_START 46 +#define SST_BF_TDP_WIDTH 15 + +static int isst_if_get_base_freq_info(void __user *argp) +{ + static struct isst_base_freq_info base_freq; + struct tpmi_per_power_domain_info *power_domain_info; + + if (copy_from_user(&base_freq, argp, sizeof(base_freq))) + return -EFAULT; + + power_domain_info = get_instance(base_freq.socket_id, base_freq.power_domain_id); + if (!power_domain_info) + return -EINVAL; + + if (base_freq.level > power_domain_info->max_level) + return -EINVAL; + + _read_bf_level_info("p1_high", base_freq.high_base_freq_mhz, base_freq.level, + SST_BF_INFO_0_OFFSET, SST_BF_P1_HIGH_START, SST_BF_P1_HIGH_WIDTH, + SST_MUL_FACTOR_FREQ) + _read_bf_level_info("p1_low", base_freq.low_base_freq_mhz, base_freq.level, + SST_BF_INFO_0_OFFSET, SST_BF_P1_LOW_START, SST_BF_P1_LOW_WIDTH, + SST_MUL_FACTOR_FREQ) + _read_bf_level_info("BF-TJ", base_freq.tjunction_max_c, base_freq.level, + SST_BF_INFO_0_OFFSET, SST_BF_T_PROHOT_START, SST_BF_T_PROHOT_WIDTH, + SST_MUL_FACTOR_NONE) + _read_bf_level_info("BF-tdp", base_freq.thermal_design_power_w, base_freq.level, + SST_BF_INFO_0_OFFSET, SST_BF_TDP_START, SST_BF_TDP_WIDTH, + SST_MUL_FACTOR_NONE) + base_freq.thermal_design_power_w /= 8; /*unit = 1/8th watt*/ + + if (copy_to_user(argp, &base_freq, sizeof(base_freq))) + return -EFAULT; + + return 0; +} + +#define P1_HI_CORE_MASK_START 0 +#define P1_HI_CORE_MASK_WIDTH 64 + +static int isst_if_get_base_freq_mask(void __user *argp) +{ + static struct isst_perf_level_cpu_mask cpumask; + struct tpmi_per_power_domain_info *power_domain_info; + u64 mask; + + if (copy_from_user(&cpumask, argp, sizeof(cpumask))) + return -EFAULT; + + power_domain_info = get_instance(cpumask.socket_id, cpumask.power_domain_id); + if (!power_domain_info) + return -EINVAL; + + _read_bf_level_info("BF-cpumask", mask, cpumask.level, SST_BF_INFO_1_OFFSET, + P1_HI_CORE_MASK_START, P1_HI_CORE_MASK_WIDTH, + SST_MUL_FACTOR_NONE) + + cpumask.mask = mask; + + if (!cpumask.punit_cpu_map) + return -EOPNOTSUPP; + + if (copy_to_user(argp, &cpumask, sizeof(cpumask))) + return -EFAULT; + + return 0; +} + static int isst_if_get_tpmi_instance_count(void __user *argp) { struct isst_tpmi_instance_count tpmi_inst; @@ -1079,6 +1160,12 @@ static long isst_if_def_ioctl(struct file *file, unsigned int cmd, case ISST_IF_GET_PERF_LEVEL_CPU_MASK: ret = isst_if_get_perf_level_mask(argp); break; + case ISST_IF_GET_BASE_FREQ_INFO: + ret = isst_if_get_base_freq_info(argp); + break; + case ISST_IF_GET_BASE_FREQ_CPU_MASK: + ret = isst_if_get_base_freq_mask(argp); + break; default: break; }