platform/x86/intel/uncore-freq: Move to uncore-frequency folder

Move the current driver from platform/x86/intel/uncore-frequency.c
to platform/x86/intel/uncore-frequency/uncore-frequency.c.

No functional changes are expected.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@intel.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://lore.kernel.org/r/20220204000306.2517447-2-srinivas.pandruvada@linux.intel.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

1 files changed, 0 insertions, 452 deletions

diff --git a/drivers/platform/x86/intel/uncore-frequency.c b/drivers/platform/x86/intel/uncore-frequency.c
deleted file mode 100644
index 4cd8254f2e40..000000000000
--- a/drivers/platform/x86/intel/uncore-frequency.c
+++ /dev/null
@@ -1,452 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Intel Uncore Frequency Setting
- * Copyright (c) 2019, Intel Corporation.
- * All rights reserved.
- *
- * Provide interface to set MSR 620 at a granularity of per die. On CPU online,
- * one control CPU is identified per die to read/write limit. This control CPU
- * is changed, if the CPU state is changed to offline. When the last CPU is
- * offline in a die then remove the sysfs object for that die.
- * The majority of actual code is related to sysfs create and read/write
- * attributes.
- *
- * Author: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
- */
-
-#include <linux/cpu.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/suspend.h>
-#include <asm/cpu_device_id.h>
-#include <asm/intel-family.h>
-
-#define MSR_UNCORE_RATIO_LIMIT			0x620
-#define UNCORE_FREQ_KHZ_MULTIPLIER		100000
-
-/**
- * struct uncore_data -	Encapsulate all uncore data
- * @stored_uncore_data:	Last user changed MSR 620 value, which will be restored
- *			on system resume.
- * @initial_min_freq_khz: Sampled minimum uncore frequency at driver init
- * @initial_max_freq_khz: Sampled maximum uncore frequency at driver init
- * @control_cpu:	Designated CPU for a die to read/write
- * @valid:		Mark the data valid/invalid
- *
- * This structure is used to encapsulate all data related to uncore sysfs
- * settings for a die/package.
- */
-struct uncore_data {
-	struct kobject kobj;
-	struct completion kobj_unregister;
-	u64 stored_uncore_data;
-	u32 initial_min_freq_khz;
-	u32 initial_max_freq_khz;
-	int control_cpu;
-	bool valid;
-};
-
-#define to_uncore_data(a) container_of(a, struct uncore_data, kobj)
-
-/* Max instances for uncore data, one for each die */
-static int uncore_max_entries __read_mostly;
-/* Storage for uncore data for all instances */
-static struct uncore_data *uncore_instances;
-/* Root of the all uncore sysfs kobjs */
-static struct kobject *uncore_root_kobj;
-/* Stores the CPU mask of the target CPUs to use during uncore read/write */
-static cpumask_t uncore_cpu_mask;
-/* CPU online callback register instance */
-static enum cpuhp_state uncore_hp_state __read_mostly;
-/* Mutex to control all mutual exclusions */
-static DEFINE_MUTEX(uncore_lock);
-
-struct uncore_attr {
-	struct attribute attr;
-	ssize_t (*show)(struct kobject *kobj,
-			struct attribute *attr, char *buf);
-	ssize_t (*store)(struct kobject *kobj,
-			 struct attribute *attr, const char *c, ssize_t count);
-};
-
-#define define_one_uncore_ro(_name) \
-static struct uncore_attr _name = \
-__ATTR(_name, 0444, show_##_name, NULL)
-
-#define define_one_uncore_rw(_name) \
-static struct uncore_attr _name = \
-__ATTR(_name, 0644, show_##_name, store_##_name)
-
-#define show_uncore_data(member_name)					\
-	static ssize_t show_##member_name(struct kobject *kobj,         \
-					  struct attribute *attr,	\
-					  char *buf)			\
-	{                                                               \
-		struct uncore_data *data = to_uncore_data(kobj);	\
-		return scnprintf(buf, PAGE_SIZE, "%u\n",		\
-				 data->member_name);			\
-	}								\
-	define_one_uncore_ro(member_name)
-
-show_uncore_data(initial_min_freq_khz);
-show_uncore_data(initial_max_freq_khz);
-
-/* Common function to read MSR 0x620 and read min/max */
-static int uncore_read_ratio(struct uncore_data *data, unsigned int *min,
-			     unsigned int *max)
-{
-	u64 cap;
-	int ret;
-
-	if (data->control_cpu < 0)
-		return -ENXIO;
-
-	ret = rdmsrl_on_cpu(data->control_cpu, MSR_UNCORE_RATIO_LIMIT, &cap);
-	if (ret)
-		return ret;
-
-	*max = (cap & 0x7F) * UNCORE_FREQ_KHZ_MULTIPLIER;
-	*min = ((cap & GENMASK(14, 8)) >> 8) * UNCORE_FREQ_KHZ_MULTIPLIER;
-
-	return 0;
-}
-
-/* Common function to set min/max ratios to be used by sysfs callbacks */
-static int uncore_write_ratio(struct uncore_data *data, unsigned int input,
-			      int set_max)
-{
-	int ret;
-	u64 cap;
-
-	mutex_lock(&uncore_lock);
-
-	if (data->control_cpu < 0) {
-		ret = -ENXIO;
-		goto finish_write;
-	}
-
-	input /= UNCORE_FREQ_KHZ_MULTIPLIER;
-	if (!input || input > 0x7F) {
-		ret = -EINVAL;
-		goto finish_write;
-	}
-
-	ret = rdmsrl_on_cpu(data->control_cpu, MSR_UNCORE_RATIO_LIMIT, &cap);
-	if (ret)
-		goto finish_write;
-
-	if (set_max) {
-		cap &= ~0x7F;
-		cap |= input;
-	} else  {
-		cap &= ~GENMASK(14, 8);
-		cap |= (input << 8);
-	}
-
-	ret = wrmsrl_on_cpu(data->control_cpu, MSR_UNCORE_RATIO_LIMIT, cap);
-	if (ret)
-		goto finish_write;
-
-	data->stored_uncore_data = cap;
-
-finish_write:
-	mutex_unlock(&uncore_lock);
-
-	return ret;
-}
-
-static ssize_t store_min_max_freq_khz(struct kobject *kobj,
-				      struct attribute *attr,
-				      const char *buf, ssize_t count,
-				      int min_max)
-{
-	struct uncore_data *data = to_uncore_data(kobj);
-	unsigned int input;
-
-	if (kstrtouint(buf, 10, &input))
-		return -EINVAL;
-
-	uncore_write_ratio(data, input, min_max);
-
-	return count;
-}
-
-static ssize_t show_min_max_freq_khz(struct kobject *kobj,
-				     struct attribute *attr,
-				     char *buf, int min_max)
-{
-	struct uncore_data *data = to_uncore_data(kobj);
-	unsigned int min, max;
-	int ret;
-
-	mutex_lock(&uncore_lock);
-	ret = uncore_read_ratio(data, &min, &max);
-	mutex_unlock(&uncore_lock);
-	if (ret)
-		return ret;
-
-	if (min_max)
-		return sprintf(buf, "%u\n", max);
-
-	return sprintf(buf, "%u\n", min);
-}
-
-#define store_uncore_min_max(name, min_max)				\
-	static ssize_t store_##name(struct kobject *kobj,		\
-				    struct attribute *attr,		\
-				    const char *buf, ssize_t count)	\
-	{                                                               \
-									\
-		return store_min_max_freq_khz(kobj, attr, buf, count,	\
-					      min_max);			\
-	}
-
-#define show_uncore_min_max(name, min_max)				\
-	static ssize_t show_##name(struct kobject *kobj,		\
-				   struct attribute *attr, char *buf)	\
-	{                                                               \
-									\
-		return show_min_max_freq_khz(kobj, attr, buf, min_max); \
-	}
-
-store_uncore_min_max(min_freq_khz, 0);
-store_uncore_min_max(max_freq_khz, 1);
-
-show_uncore_min_max(min_freq_khz, 0);
-show_uncore_min_max(max_freq_khz, 1);
-
-define_one_uncore_rw(min_freq_khz);
-define_one_uncore_rw(max_freq_khz);
-
-static struct attribute *uncore_attrs[] = {
-	&initial_min_freq_khz.attr,
-	&initial_max_freq_khz.attr,
-	&max_freq_khz.attr,
-	&min_freq_khz.attr,
-	NULL
-};
-ATTRIBUTE_GROUPS(uncore);
-
-static void uncore_sysfs_entry_release(struct kobject *kobj)
-{
-	struct uncore_data *data = to_uncore_data(kobj);
-
-	complete(&data->kobj_unregister);
-}
-
-static struct kobj_type uncore_ktype = {
-	.release = uncore_sysfs_entry_release,
-	.sysfs_ops = &kobj_sysfs_ops,
-	.default_groups = uncore_groups,
-};
-
-/* Caller provides protection */
-static struct uncore_data *uncore_get_instance(unsigned int cpu)
-{
-	int id = topology_logical_die_id(cpu);
-
-	if (id >= 0 && id < uncore_max_entries)
-		return &uncore_instances[id];
-
-	return NULL;
-}
-
-static void uncore_add_die_entry(int cpu)
-{
-	struct uncore_data *data;
-
-	mutex_lock(&uncore_lock);
-	data = uncore_get_instance(cpu);
-	if (!data) {
-		mutex_unlock(&uncore_lock);
-		return;
-	}
-
-	if (data->valid) {
-		/* control cpu changed */
-		data->control_cpu = cpu;
-	} else {
-		char str[64];
-		int ret;
-
-		memset(data, 0, sizeof(*data));
-		sprintf(str, "package_%02d_die_%02d",
-			topology_physical_package_id(cpu),
-			topology_die_id(cpu));
-
-		uncore_read_ratio(data, &data->initial_min_freq_khz,
-				  &data->initial_max_freq_khz);
-
-		init_completion(&data->kobj_unregister);
-
-		ret = kobject_init_and_add(&data->kobj, &uncore_ktype,
-					   uncore_root_kobj, str);
-		if (!ret) {
-			data->control_cpu = cpu;
-			data->valid = true;
-		}
-	}
-	mutex_unlock(&uncore_lock);
-}
-
-/* Last CPU in this die is offline, make control cpu invalid */
-static void uncore_remove_die_entry(int cpu)
-{
-	struct uncore_data *data;
-
-	mutex_lock(&uncore_lock);
-	data = uncore_get_instance(cpu);
-	if (data)
-		data->control_cpu = -1;
-	mutex_unlock(&uncore_lock);
-}
-
-static int uncore_event_cpu_online(unsigned int cpu)
-{
-	int target;
-
-	/* Check if there is an online cpu in the package for uncore MSR */
-	target = cpumask_any_and(&uncore_cpu_mask, topology_die_cpumask(cpu));
-	if (target < nr_cpu_ids)
-		return 0;
-
-	/* Use this CPU on this die as a control CPU */
-	cpumask_set_cpu(cpu, &uncore_cpu_mask);
-	uncore_add_die_entry(cpu);
-
-	return 0;
-}
-
-static int uncore_event_cpu_offline(unsigned int cpu)
-{
-	int target;
-
-	/* Check if existing cpu is used for uncore MSRs */
-	if (!cpumask_test_and_clear_cpu(cpu, &uncore_cpu_mask))
-		return 0;
-
-	/* Find a new cpu to set uncore MSR */
-	target = cpumask_any_but(topology_die_cpumask(cpu), cpu);
-
-	if (target < nr_cpu_ids) {
-		cpumask_set_cpu(target, &uncore_cpu_mask);
-		uncore_add_die_entry(target);
-	} else {
-		uncore_remove_die_entry(cpu);
-	}
-
-	return 0;
-}
-
-static int uncore_pm_notify(struct notifier_block *nb, unsigned long mode,
-			    void *_unused)
-{
-	int cpu;
-
-	switch (mode) {
-	case PM_POST_HIBERNATION:
-	case PM_POST_RESTORE:
-	case PM_POST_SUSPEND:
-		for_each_cpu(cpu, &uncore_cpu_mask) {
-			struct uncore_data *data;
-			int ret;
-
-			data = uncore_get_instance(cpu);
-			if (!data || !data->valid || !data->stored_uncore_data)
-				continue;
-
-			ret = wrmsrl_on_cpu(cpu, MSR_UNCORE_RATIO_LIMIT,
-					    data->stored_uncore_data);
-			if (ret)
-				return ret;
-		}
-		break;
-	default:
-		break;
-	}
-	return 0;
-}
-
-static struct notifier_block uncore_pm_nb = {
-	.notifier_call = uncore_pm_notify,
-};
-
-static const struct x86_cpu_id intel_uncore_cpu_ids[] = {
-	X86_MATCH_INTEL_FAM6_MODEL(BROADWELL_G,	NULL),
-	X86_MATCH_INTEL_FAM6_MODEL(BROADWELL_X,	NULL),
-	X86_MATCH_INTEL_FAM6_MODEL(BROADWELL_D,	NULL),
-	X86_MATCH_INTEL_FAM6_MODEL(SKYLAKE_X,	NULL),
-	X86_MATCH_INTEL_FAM6_MODEL(ICELAKE_X,	NULL),
-	X86_MATCH_INTEL_FAM6_MODEL(ICELAKE_D,	NULL),
-	X86_MATCH_INTEL_FAM6_MODEL(SAPPHIRERAPIDS_X, NULL),
-	{}
-};
-
-static int __init intel_uncore_init(void)
-{
-	const struct x86_cpu_id *id;
-	int ret;
-
-	id = x86_match_cpu(intel_uncore_cpu_ids);
-	if (!id)
-		return -ENODEV;
-
-	uncore_max_entries = topology_max_packages() *
-					topology_max_die_per_package();
-	uncore_instances = kcalloc(uncore_max_entries,
-				   sizeof(*uncore_instances), GFP_KERNEL);
-	if (!uncore_instances)
-		return -ENOMEM;
-
-	uncore_root_kobj = kobject_create_and_add("intel_uncore_frequency",
-						  &cpu_subsys.dev_root->kobj);
-	if (!uncore_root_kobj) {
-		ret = -ENOMEM;
-		goto err_free;
-	}
-
-	ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN,
-				"platform/x86/uncore-freq:online",
-				uncore_event_cpu_online,
-				uncore_event_cpu_offline);
-	if (ret < 0)
-		goto err_rem_kobj;
-
-	uncore_hp_state = ret;
-
-	ret = register_pm_notifier(&uncore_pm_nb);
-	if (ret)
-		goto err_rem_state;
-
-	return 0;
-
-err_rem_state:
-	cpuhp_remove_state(uncore_hp_state);
-err_rem_kobj:
-	kobject_put(uncore_root_kobj);
-err_free:
-	kfree(uncore_instances);
-
-	return ret;
-}
-module_init(intel_uncore_init)
-
-static void __exit intel_uncore_exit(void)
-{
-	int i;
-
-	unregister_pm_notifier(&uncore_pm_nb);
-	cpuhp_remove_state(uncore_hp_state);
-	for (i = 0; i < uncore_max_entries; ++i) {
-		if (uncore_instances[i].valid) {
-			kobject_put(&uncore_instances[i].kobj);
-			wait_for_completion(&uncore_instances[i].kobj_unregister);
-		}
-	}
-	kobject_put(uncore_root_kobj);
-	kfree(uncore_instances);
-}
-module_exit(intel_uncore_exit)
-
-MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION("Intel Uncore Frequency Limits Driver");