Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Received-SPF: Pass (protection.outlook.com: domain of amd.com designates
 165.204.84.17 as permitted sender) receiver=protection.outlook.com;
 client-ip=165.204.84.17; helo=SATLEXMB04.amd.com;
From:   Huang Rui <ray.huang@amd.com>
To:     "Rafael J . Wysocki" <rafael.j.wysocki@intel.com>,
        Viresh Kumar <viresh.kumar@linaro.org>,
        Shuah Khan <skhan@linuxfoundation.org>,
        "Borislav Petkov" <bp@suse.de>,
        Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@kernel.org>,
        Giovanni Gherdovich <ggherdovich@suse.cz>,
        <linux-pm@vger.kernel.org>
CC:     Deepak Sharma <deepak.sharma@amd.com>,
        Alex Deucher <alexander.deucher@amd.com>,
        Mario Limonciello <mario.limonciello@amd.com>,
        Steven Noonan <steven@valvesoftware.com>,
        Nathan Fontenot <nathan.fontenot@amd.com>,
        Jinzhou Su <Jinzhou.Su@amd.com>,
        Xiaojian Du <Xiaojian.Du@amd.com>,
        <linux-kernel@vger.kernel.org>, <x86@kernel.org>,
        Huang Rui <ray.huang@amd.com>
Subject: [PATCH v3 11/21] cpufreq: amd: add amd-pstate frequencies attributes
Date:   Fri, 29 Oct 2021 21:02:31 +0800
Message-ID: <20211029130241.1984459-12-ray.huang@amd.com>
In-Reply-To: <20211029130241.1984459-1-ray.huang@amd.com>
References: <20211029130241.1984459-1-ray.huang@amd.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Content-Type: text/plain
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 29 Oct 2021 13:04:11.2134
 (UTC)
X-MS-Exchange-CrossTenant-Network-Message-Id: 0b1114c0-bebc-48df-36b9-08d99adc99bf
X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d
X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com]
X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT003.eop-nam11.prod.protection.outlook.com
X-MS-Exchange-CrossTenant-AuthAs: Anonymous
X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem
X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY5PR12MB4130
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

Introduce sysfs attributes to get the different level processor
frequencies.

Signed-off-by: Huang Rui <ray.huang@amd.com>
---
 drivers/cpufreq/amd-pstate.c | 63 ++++++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)

diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c
index 9af27ac1f818..8cf1e80f44e0 100644
--- a/drivers/cpufreq/amd-pstate.c
+++ b/drivers/cpufreq/amd-pstate.c
@@ -485,6 +485,68 @@ static int amd_pstate_cpu_exit(struct cpufreq_policy *policy)
 	return 0;
 }
 
+/* Sysfs attributes */
+
+/* This frequency is to indicate the maximum hardware frequency.
+ * If boost is not active but supported, the frequency will be larger than the
+ * one in cpuinfo.
+ */
+static ssize_t show_amd_pstate_max_freq(struct cpufreq_policy *policy,
+					char *buf)
+{
+	int max_freq;
+	struct amd_cpudata *cpudata;
+
+	cpudata = policy->driver_data;
+
+	max_freq = amd_get_max_freq(cpudata);
+	if (max_freq < 0)
+		return max_freq;
+
+	return sprintf(&buf[0], "%u\n", max_freq);
+}
+
+static ssize_t show_amd_pstate_nominal_freq(struct cpufreq_policy *policy,
+					    char *buf)
+{
+	int nominal_freq;
+	struct amd_cpudata *cpudata;
+
+	cpudata = policy->driver_data;
+
+	nominal_freq = amd_get_nominal_freq(cpudata);
+	if (nominal_freq < 0)
+		return nominal_freq;
+
+	return sprintf(&buf[0], "%u\n", nominal_freq);
+}
+
+static ssize_t show_amd_pstate_lowest_nonlinear_freq(struct cpufreq_policy *policy,
+						     char *buf)
+{
+	int freq;
+	struct amd_cpudata *cpudata;
+
+	cpudata = policy->driver_data;
+
+	freq = amd_get_lowest_nonlinear_freq(cpudata);
+	if (freq < 0)
+		return freq;
+
+	return sprintf(&buf[0], "%u\n", freq);
+}
+
+cpufreq_freq_attr_ro(amd_pstate_max_freq);
+cpufreq_freq_attr_ro(amd_pstate_nominal_freq);
+cpufreq_freq_attr_ro(amd_pstate_lowest_nonlinear_freq);
+
+static struct freq_attr *amd_pstate_attr[] = {
+	&amd_pstate_max_freq,
+	&amd_pstate_nominal_freq,
+	&amd_pstate_lowest_nonlinear_freq,
+	NULL,
+};
+
 static struct cpufreq_driver amd_pstate_driver = {
 	.flags		= CPUFREQ_CONST_LOOPS | CPUFREQ_NEED_UPDATE_LIMITS,
 	.verify		= amd_pstate_verify,
@@ -493,6 +555,7 @@ static struct cpufreq_driver amd_pstate_driver = {
 	.exit		= amd_pstate_cpu_exit,
 	.set_boost	= amd_pstate_set_boost,
 	.name		= "amd-pstate",
+	.attr           = amd_pstate_attr,
 };
 
 static int __init amd_pstate_init(void)
-- 
2.25.1