From d2ccde1c8e90d38cee87a1b0309ad2827f3fd30d Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 11 Dec 2023 02:45:28 +0000
Subject: [PATCH] add boot partition size
---
kernel/drivers/cpufreq/powernv-cpufreq.c | 67 ++++++++++++++++-----------------
1 files changed, 33 insertions(+), 34 deletions(-)
diff --git a/kernel/drivers/cpufreq/powernv-cpufreq.c b/kernel/drivers/cpufreq/powernv-cpufreq.c
index 3ebadab..8977e4d 100644
--- a/kernel/drivers/cpufreq/powernv-cpufreq.c
+++ b/kernel/drivers/cpufreq/powernv-cpufreq.c
@@ -1,20 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* POWERNV cpufreq driver for the IBM POWER processors
*
* (C) Copyright IBM 2014
*
* Author: Vaidyanathan Srinivasan <svaidy at linux.vnet.ibm.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
*/
#define pr_fmt(fmt) "powernv-cpufreq: " fmt
@@ -75,13 +65,14 @@
* highest_lpstate_idx
* @last_sampled_time: Time from boot in ms when global pstates were
* last set
- * @last_lpstate_idx, Last set value of local pstate and global
- * last_gpstate_idx pstate in terms of cpufreq table index
+ * @last_lpstate_idx: Last set value of local pstate and global
+ * @last_gpstate_idx: pstate in terms of cpufreq table index
* @timer: Is used for ramping down if cpu goes idle for
* a long time with global pstate held high
* @gpstate_lock: A spinlock to maintain synchronization between
* routines called by the timer handler and
* governer's target_index calls
+ * @policy: Associated CPUFreq policy
*/
struct global_pstate_info {
int highest_lpstate_idx;
@@ -96,7 +87,7 @@
static struct cpufreq_frequency_table powernv_freqs[POWERNV_MAX_PSTATES+1];
-DEFINE_HASHTABLE(pstate_revmap, POWERNV_MAX_PSTATES_ORDER);
+static DEFINE_HASHTABLE(pstate_revmap, POWERNV_MAX_PSTATES_ORDER);
/**
* struct pstate_idx_revmap_data: Entry in the hashmap pstate_revmap
* indexed by a function of pstate id.
@@ -181,7 +172,7 @@
/* Use following functions for conversions between pstate_id and index */
-/**
+/*
* idx_to_pstate : Returns the pstate id corresponding to the
* frequency in the cpufreq frequency table
* powernv_freqs indexed by @i.
@@ -199,7 +190,7 @@
return powernv_freqs[i].driver_data;
}
-/**
+/*
* pstate_to_idx : Returns the index in the cpufreq frequencytable
* powernv_freqs for the frequency whose corresponding
* pstate id is @pstate.
@@ -245,6 +236,7 @@
u32 len_ids, len_freqs;
u32 pstate_min, pstate_max, pstate_nominal;
u32 pstate_turbo, pstate_ultra_turbo;
+ int rc = -ENODEV;
power_mgt = of_find_node_by_path("/ibm,opal/power-mgt");
if (!power_mgt) {
@@ -254,18 +246,18 @@
if (of_property_read_u32(power_mgt, "ibm,pstate-min", &pstate_min)) {
pr_warn("ibm,pstate-min node not found\n");
- return -ENODEV;
+ goto out;
}
if (of_property_read_u32(power_mgt, "ibm,pstate-max", &pstate_max)) {
pr_warn("ibm,pstate-max node not found\n");
- return -ENODEV;
+ goto out;
}
if (of_property_read_u32(power_mgt, "ibm,pstate-nominal",
&pstate_nominal)) {
pr_warn("ibm,pstate-nominal not found\n");
- return -ENODEV;
+ goto out;
}
if (of_property_read_u32(power_mgt, "ibm,pstate-ultra-turbo",
@@ -294,14 +286,14 @@
pstate_ids = of_get_property(power_mgt, "ibm,pstate-ids", &len_ids);
if (!pstate_ids) {
pr_warn("ibm,pstate-ids not found\n");
- return -ENODEV;
+ goto out;
}
pstate_freqs = of_get_property(power_mgt, "ibm,pstate-frequencies-mhz",
&len_freqs);
if (!pstate_freqs) {
pr_warn("ibm,pstate-frequencies-mhz not found\n");
- return -ENODEV;
+ goto out;
}
if (len_ids != len_freqs) {
@@ -312,7 +304,7 @@
nr_pstates = min(len_ids, len_freqs) / sizeof(u32);
if (!nr_pstates) {
pr_warn("No PStates found\n");
- return -ENODEV;
+ goto out;
}
powernv_pstate_info.nr_pstates = nr_pstates;
@@ -328,8 +320,11 @@
powernv_freqs[i].frequency = freq * 1000; /* kHz */
powernv_freqs[i].driver_data = id & 0xFF;
- revmap_data = (struct pstate_idx_revmap_data *)
- kmalloc(sizeof(*revmap_data), GFP_KERNEL);
+ revmap_data = kmalloc(sizeof(*revmap_data), GFP_KERNEL);
+ if (!revmap_data) {
+ rc = -ENOMEM;
+ goto out;
+ }
revmap_data->pstate_id = id & 0xFF;
revmap_data->cpufreq_table_idx = i;
@@ -353,7 +348,12 @@
/* End of list marker entry */
powernv_freqs[i].frequency = CPUFREQ_TABLE_END;
+
+ of_node_put(power_mgt);
return 0;
+out:
+ of_node_put(power_mgt);
+ return rc;
}
/* Returns the CPU frequency corresponding to the pstate_id. */
@@ -382,7 +382,7 @@
powernv_freqs[powernv_pstate_info.nominal].frequency);
}
-struct freq_attr cpufreq_freq_attr_cpuinfo_nominal_freq =
+static struct freq_attr cpufreq_freq_attr_cpuinfo_nominal_freq =
__ATTR_RO(cpuinfo_nominal_freq);
#define SCALING_BOOST_FREQS_ATTR_INDEX 2
@@ -662,13 +662,13 @@
/**
* gpstate_timer_handler
*
- * @data: pointer to cpufreq_policy on which timer was queued
+ * @t: Timer context used to fetch global pstate info struct
*
* This handler brings down the global pstate closer to the local pstate
* according quadratic equation. Queues a new timer if it is still not equal
* to local pstate
*/
-void gpstate_timer_handler(struct timer_list *t)
+static void gpstate_timer_handler(struct timer_list *t)
{
struct global_pstate_info *gpstates = from_timer(gpstates, t, timer);
struct cpufreq_policy *policy = gpstates->policy;
@@ -904,7 +904,7 @@
.notifier_call = powernv_cpufreq_reboot_notifier,
};
-void powernv_cpufreq_work_fn(struct work_struct *work)
+static void powernv_cpufreq_work_fn(struct work_struct *work)
{
struct chip *chip = container_of(work, struct chip, throttle);
struct cpufreq_policy *policy;
@@ -1133,9 +1133,6 @@
if (rc)
goto out;
- register_reboot_notifier(&powernv_cpufreq_reboot_nb);
- opal_message_notifier_register(OPAL_MSG_OCC, &powernv_cpufreq_opal_nb);
-
if (powernv_pstate_info.wof_enabled)
powernv_cpufreq_driver.boost_enabled = true;
else
@@ -1144,15 +1141,17 @@
rc = cpufreq_register_driver(&powernv_cpufreq_driver);
if (rc) {
pr_info("Failed to register the cpufreq driver (%d)\n", rc);
- goto cleanup_notifiers;
+ goto cleanup;
}
if (powernv_pstate_info.wof_enabled)
cpufreq_enable_boost_support();
+ register_reboot_notifier(&powernv_cpufreq_reboot_nb);
+ opal_message_notifier_register(OPAL_MSG_OCC, &powernv_cpufreq_opal_nb);
+
return 0;
-cleanup_notifiers:
- unregister_all_notifiers();
+cleanup:
clean_chip_info();
out:
pr_info("Platform driver disabled. System does not support PState control\n");
--
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