From patchwork Wed Jun 19 12:45:59 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: srinivas pandruvada X-Patchwork-Id: 13703795 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D88B8145334; Wed, 19 Jun 2024 12:46:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.18 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718801173; cv=none; b=YLjpp6CMa+k+84Vo0LyoX/mwyMT2tj0cu0uSdsSySK8ZAQSyahOqrKuRaBVFXwJVHErHsym0FndbQWopUFrVT70Epem8eSaUVG8GIu8uZixn7aMKpkhglJYPLKvVWe9xl4cLd3tGPzWHPakXC9xOpQcwAfxfG6KtY+r9/MduXbI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718801173; c=relaxed/simple; bh=aiGo3rcf2uo+eDhr9xR5stSoVwaMZ13XXsXjohIC9K0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=GqNZ4AF+1/lo+PV/Cx21EzTjsZNISvX5zJVfJBpSCo8Y9lL7sxtG9Aj4buM/BimCGAbJxebp1u3WPc2xFFO19WX5GRSF/iZI1Vpxf2GV53q7feKwPs/ffmDsZA6ib2b09zPxAxylcqAga4I2LcnR5OBLW3KWKjOKANc67Jqas/U= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=DfCrnNG9; arc=none smtp.client-ip=192.198.163.18 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="DfCrnNG9" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1718801172; x=1750337172; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=aiGo3rcf2uo+eDhr9xR5stSoVwaMZ13XXsXjohIC9K0=; b=DfCrnNG9A9uTBn2M1VkXZs7Bj3QcCjyn0wWs/0ELFtHzegOmkZmtUpvK emWWoQxkSP3x2iFGLru6PvXBYW4dikgUcB0Dsrne/NBW7nxsZdJz/wxZX V3h19RNNuD/ZZwo/t2j2S5BGrxH8AEPrfFPa3cpDzE86nEWO933aK8vZO +O9KqbPVvha2M33i5wqil1pTPmwQEVv+lC0J29bx2P1rNCLTty5OLCWof pClaWLLs5Qwkj9JkMBWEIE4iyWIn/LAN1UjmYGesBFRvGc0yBdd8Lb+fr Iu2sip4L/p4E78E1YIMt+P9ztHn/8/5RZU+37pueVFGpwsfiPSLoB0kIf A==; X-CSE-ConnectionGUID: 81fivVMSR8OWmZrKhcBPoA== X-CSE-MsgGUID: nrlHzopmTD+pUjbxQM/LaQ== X-IronPort-AV: E=McAfee;i="6700,10204,11107"; a="15449939" X-IronPort-AV: E=Sophos;i="6.08,250,1712646000"; d="scan'208";a="15449939" Received: from fmviesa005.fm.intel.com ([10.60.135.145]) by fmvoesa112.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Jun 2024 05:46:09 -0700 X-CSE-ConnectionGUID: cpwbqXB3QQed3i8AjUIhsQ== X-CSE-MsgGUID: we8JRXOpSKS3fHZJwipsdA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.08,250,1712646000"; d="scan'208";a="46344344" Received: from spandruv-desk.jf.intel.com ([10.54.75.19]) by fmviesa005.fm.intel.com with ESMTP; 19 Jun 2024 05:46:08 -0700 From: Srinivas Pandruvada To: rafael@kernel.org, daniel.lezcano@linaro.org, rui.zhang@intel.com, lukasz.luba@arm.com Cc: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, Srinivas Pandruvada Subject: [PATCH 2/3] thermal: intel: int340x: Capability to map user space to firmware values Date: Wed, 19 Jun 2024 05:45:59 -0700 Message-ID: <20240619124600.491168-3-srinivas.pandruvada@linux.intel.com> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240619124600.491168-1-srinivas.pandruvada@linux.intel.com> References: <20240619124600.491168-1-srinivas.pandruvada@linux.intel.com> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 To ensure compatibility between user inputs and firmware requirements, a conversion mechanism is necessary for certain attributes. For instance, on some platforms, the DLVR frequency must be translated into a predefined index before being communicated to the firmware. On Lunar Lake platform: RFI_FREQ_SELECT and RFI_FREQ: Index 0 corresponds to a DLVR frequency of 2227.2 MHz Index 1 corresponds to a DLVR frequency of 2140 MHz Introduce a feature that enables the conversion of values between user space inputs and firmware-accepted formats. This feature would also facilitate the reverse process, converting firmware values back into user friendly display values. To support this functionality, a model-specific mapping table will be utilized. When available, this table will provide the necessary translations between user space values and firmware values, ensuring seamless communication and accurate settings. Signed-off-by: Srinivas Pandruvada --- .../int340x_thermal/processor_thermal_rfim.c | 80 ++++++++++++++++++- 1 file changed, 76 insertions(+), 4 deletions(-) diff --git a/drivers/thermal/intel/int340x_thermal/processor_thermal_rfim.c b/drivers/thermal/intel/int340x_thermal/processor_thermal_rfim.c index e56db75a94fb..c9c77bca2014 100644 --- a/drivers/thermal/intel/int340x_thermal/processor_thermal_rfim.c +++ b/drivers/thermal/intel/int340x_thermal/processor_thermal_rfim.c @@ -19,6 +19,12 @@ struct mmio_reg { u16 shift; }; +struct mapping_table { + const char *attr_name; + const u32 value; + const char *mapped_str; +}; + /* These will represent sysfs attribute names */ static const char * const fivr_strings[] = { "vco_ref_code_lo", @@ -62,6 +68,59 @@ static const struct mmio_reg dlvr_mmio_regs[] = { { 1, 0x15A10, 1, 0x1, 16}, /* dlvr_pll_busy */ }; +static int match_mapping_table(const struct mapping_table *table, const char *attr_name, + bool match_int_value, const u32 value, const char *value_str, + char **result_str, u32 *result_int) +{ + bool attr_matched = false; + int i = 0; + + if (!table) + return -EOPNOTSUPP; + + while (table[i].attr_name) { + if (strncmp(table[i].attr_name, attr_name, strlen(attr_name))) + goto match_next; + + attr_matched = true; + + if (match_int_value) { + if (table[i].value != value) + goto match_next; + + *result_str = (char *)table[i].mapped_str; + return 0; + } + + if (strncmp(table[i].mapped_str, value_str, strlen(table[i].mapped_str))) + goto match_next; + + *result_int = table[i].value; + + return 0; +match_next: + i++; + } + + /* If attribute name is matched, then the user space value is invalid */ + if (attr_matched) + return -EINVAL; + + return -EOPNOTSUPP; +} + +static int get_mapped_string(const struct mapping_table *table, const char *attr_name, + u32 value, char **result) +{ + return match_mapping_table(table, attr_name, true, value, NULL, result, NULL); +} + +static int get_mapped_value(const struct mapping_table *table, const char *attr_name, + const char *value, unsigned int *result) +{ + return match_mapping_table(table, attr_name, false, 0, value, NULL, result); +} + /* These will represent sysfs attribute names */ static const char * const dvfs_strings[] = { "rfi_restriction_run_busy", @@ -93,12 +152,14 @@ static ssize_t suffix##_show(struct device *dev,\ struct device_attribute *attr,\ char *buf)\ {\ + const struct mapping_table *mapping = NULL;\ struct proc_thermal_device *proc_priv;\ struct pci_dev *pdev = to_pci_dev(dev);\ const struct mmio_reg *mmio_regs;\ const char **match_strs;\ + int ret, err;\ u32 reg_val;\ - int ret;\ + char *str;\ \ proc_priv = pci_get_drvdata(pdev);\ if (table == 1) {\ @@ -116,7 +177,12 @@ static ssize_t suffix##_show(struct device *dev,\ return ret;\ reg_val = readl((void __iomem *) (proc_priv->mmio_base + mmio_regs[ret].offset));\ ret = (reg_val >> mmio_regs[ret].shift) & mmio_regs[ret].mask;\ - return sprintf(buf, "%u\n", ret);\ + err = get_mapped_string(mapping, attr->attr.name, ret, &str);\ + if (!err)\ + return sprintf(buf, "%s\n", str);\ + if (err == -EOPNOTSUPP)\ + return sprintf(buf, "%u\n", ret);\ + return err;\ } #define RFIM_STORE(suffix, table)\ @@ -124,6 +190,7 @@ static ssize_t suffix##_store(struct device *dev,\ struct device_attribute *attr,\ const char *buf, size_t count)\ {\ + const struct mapping_table *mapping = NULL;\ struct proc_thermal_device *proc_priv;\ struct pci_dev *pdev = to_pci_dev(dev);\ unsigned int input;\ @@ -150,9 +217,14 @@ static ssize_t suffix##_store(struct device *dev,\ return ret;\ if (mmio_regs[ret].read_only)\ return -EPERM;\ - err = kstrtouint(buf, 10, &input);\ - if (err)\ + err = get_mapped_value(mapping, attr->attr.name, buf, &input);\ + if (err == -EINVAL)\ return err;\ + if (err == -EOPNOTSUPP) {\ + err = kstrtouint(buf, 10, &input);\ + if (err)\ + return err;\ + } \ mask = GENMASK(mmio_regs[ret].shift + mmio_regs[ret].bits - 1, mmio_regs[ret].shift);\ reg_val = readl((void __iomem *) (proc_priv->mmio_base + mmio_regs[ret].offset));\ reg_val &= ~mask;\