From: liuyun liuyun@loongson.cn

LoongArch inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I6BWFP

--------------------------------

Signed-off-by: zhangtianyang zhangtianyang@loongson.cn Signed-off-by: liuyun liuyun@loongson.cn --- arch/loongarch/Kconfig | 1 + arch/loongarch/configs/loongson3_defconfig | 4 + arch/loongarch/include/asm/fpu.h | 13 +- drivers/cpufreq/Kconfig | 11 + drivers/cpufreq/Makefile | 1 + drivers/cpufreq/loongson3-acpi-cpufreq.c | 1527 ++++++++++++++++++++ 6 files changed, 1556 insertions(+), 1 deletion(-) create mode 100644 drivers/cpufreq/loongson3-acpi-cpufreq.c

diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig index acde3b2faf76..f74448967240 100644 --- a/arch/loongarch/Kconfig +++ b/arch/loongarch/Kconfig @@ -673,6 +673,7 @@ config ARCH_SUSPEND_POSSIBLE config ARCH_HIBERNATION_POSSIBLE def_bool y

+source "drivers/cpufreq/Kconfig" source "kernel/power/Kconfig" source "drivers/acpi/Kconfig"

diff --git a/arch/loongarch/configs/loongson3_defconfig b/arch/loongarch/configs/loongson3_defconfig index a3b52aaa83b3..5bc8803dee3e 100644 --- a/arch/loongarch/configs/loongson3_defconfig +++ b/arch/loongarch/configs/loongson3_defconfig @@ -61,6 +61,10 @@ CONFIG_ACPI_DOCK=y CONFIG_ACPI_IPMI=m CONFIG_ACPI_HOTPLUG_CPU=y CONFIG_ACPI_PCI_SLOT=y +CONFIG_CPU_FREQ=y +CONFIG_CPU_FREQ_STAT=y +CONFIG_CPU_FREQ_GOV_POWERSAVE=y +CONFIG_LOONGSON3_ACPI_CPUFREQ=y CONFIG_ACPI_HOTPLUG_MEMORY=y CONFIG_EFI_ZBOOT=y CONFIG_EFI_GENERIC_STUB_INITRD_CMDLINE_LOADER=y diff --git a/arch/loongarch/include/asm/fpu.h b/arch/loongarch/include/asm/fpu.h index c2d8962fda00..4d635b8e3245 100644 --- a/arch/loongarch/include/asm/fpu.h +++ b/arch/loongarch/include/asm/fpu.h @@ -48,6 +48,10 @@ static inline void disable_lasx(void); static inline void save_lasx(struct task_struct *t); static inline void restore_lasx(struct task_struct *t);

+#ifdef CONFIG_LOONGSON3_ACPI_CPUFREQ +DECLARE_PER_CPU(unsigned long, msa_count); +DECLARE_PER_CPU(unsigned long, lasx_count); +#endif /* * Mask the FCSR Cause bits according to the Enable bits, observing * that Unimplemented is always enabled. @@ -210,6 +214,9 @@ static inline void enable_lsx(void) { if (cpu_has_lsx) csr_xchg32(CSR_EUEN_LSXEN, CSR_EUEN_LSXEN, LOONGARCH_CSR_EUEN); +#ifdef CONFIG_LOONGSON3_ACPI_CPUFREQ + per_cpu(msa_count, raw_smp_processor_id())++; +#endif }

static inline void disable_lsx(void) @@ -256,8 +263,12 @@ static inline void restore_lsx_upper(struct task_struct *t) {} static inline void enable_lasx(void) {

- if (cpu_has_lasx) + if (cpu_has_lasx) { csr_xchg32(CSR_EUEN_LASXEN, CSR_EUEN_LASXEN, LOONGARCH_CSR_EUEN); +#ifdef CONFIG_LOONGSON3_ACPI_CPUFREQ + per_cpu(lasx_count, raw_smp_processor_id())++; +#endif + } }

static inline void disable_lasx(void) diff --git a/drivers/cpufreq/Kconfig b/drivers/cpufreq/Kconfig index f429b9b37b76..b14584bfdf3f 100644 --- a/drivers/cpufreq/Kconfig +++ b/drivers/cpufreq/Kconfig @@ -273,6 +273,17 @@ config LOONGSON2_CPUFREQ If in doubt, say N. endif

+if LOONGARCH +config LOONGSON3_ACPI_CPUFREQ + bool "Loongson3 ACPI cpufreq driver" + depends on ACPI_PROCESSOR + help + This driver adds a CPUFreq driver which utilizes the ACPI + Processor Performance States. + This driver supports Loongson 3A5000 compatible CPUs. + If in doubt, say N. +endif + if SPARC64 config SPARC_US3_CPUFREQ tristate "UltraSPARC-III CPU Frequency driver" diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile index ef8510774913..076ea3ac1b56 100644 --- a/drivers/cpufreq/Makefile +++ b/drivers/cpufreq/Makefile @@ -104,6 +104,7 @@ obj-$(CONFIG_POWERNV_CPUFREQ) += powernv-cpufreq.o obj-$(CONFIG_BMIPS_CPUFREQ) += bmips-cpufreq.o obj-$(CONFIG_IA64_ACPI_CPUFREQ) += ia64-acpi-cpufreq.o obj-$(CONFIG_LOONGSON2_CPUFREQ) += loongson2_cpufreq.o +obj-$(CONFIG_LOONGSON3_ACPI_CPUFREQ) += loongson3-acpi-cpufreq.o obj-$(CONFIG_SH_CPU_FREQ) += sh-cpufreq.o obj-$(CONFIG_SPARC_US2E_CPUFREQ) += sparc-us2e-cpufreq.o obj-$(CONFIG_SPARC_US3_CPUFREQ) += sparc-us3-cpufreq.o diff --git a/drivers/cpufreq/loongson3-acpi-cpufreq.c b/drivers/cpufreq/loongson3-acpi-cpufreq.c new file mode 100644 index 000000000000..018b529a0cf9 --- /dev/null +++ b/drivers/cpufreq/loongson3-acpi-cpufreq.c @@ -0,0 +1,1527 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * loongson3-acpi-cpufreq.c - Loongson ACPI Processor P-States Driver + * + * Copyright (C) 2020 lvjianmin lvjianmin@loongson.cn + * Yijun yijun@loongson.cn + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/smp.h> +#include <linux/sched.h> +#include <linux/cpufreq.h> +#include <linux/compiler.h> +#include <linux/sched/cpufreq.h> +#include <linux/dmi.h> +#include <linux/slab.h> +#include <linux/kthread.h> +#include <linux/acpi.h> +#include <linux/io.h> +#include <linux/delay.h> +#include <linux/uaccess.h> +#include <linux/processor.h> +#include <linux/cpufeature.h> +#include <uapi/linux/sched/types.h> +#include <acpi/processor.h> + +#include <asm/loongson.h> +#include "cpufreq_governor.h" + +#include <asm/time.h> +#define CPU_ID_FIELD 0xf + +#define COMPLETE_STATUS 0x80000000 +#define VOLTAGE_COMMAND 0x21 + +#define DVFS_INFO 0x22 +#define DVFS_INFO_BOOST_LEVEL 0x23 +#define DVFS_INFO_MIN_FREQ 0xf +#define DVFS_INFO_MAX_FREQ 0xf0 +#define DVFS_INFO_BOOST_CORE_FREQ 0xff00 +#define DVFS_INFO_NORMAL_CORE_UPPER_LIMIT 0xf0000 +#define DVFS_INFO_BOOST_CORES 0xf00000 + +#define BOOST_MODE 0x80000 +#define NORMAL_MODE 0x40000 + +MODULE_DESCRIPTION("Loongson 3A5000 ACPI Processor P-States Driver"); + +MODULE_LICENSE("GPL"); + +#define CPUFREQ_SAMPLING_INTERVAL (2 * TICK_NSEC / NSEC_PER_USEC) +#define LOONGSON_CONTROL_MASK (0xFF) +#define FACTOR (0xeac0c6e8) +#define BOOST_THRESHOLD (900) +#define MAX_CORES_PER_PACKAGE 64 +#define CPU_ID_FIELD 0xf +#define VOLTAGE_COMMAND 0x21 +#define MAX_READY_TIMEOUT 300000000 +#define RESERVED_FREQ 3 + +#define LOONGSON_BOOST_FREQ_MASK (0x7 << 8) +#define FREQ_STEP (25) + +static struct mutex boost_mutex[MAX_PACKAGES]; +static bool cpufreq_has_boost_freq; +static int max_boost_cores; +static int boost_gears; +static int boost_freqs[NR_CPUS + 1]; +struct package_data; +struct core_data; +static struct acpi_processor_performance __percpu *acpi_perf_data; +static struct cpufreq_driver loongson3_cpufreq_driver; +static struct freq_attr *loongson3_cpufreq_attr[]; +DECLARE_PER_CPU(struct clock_event_device, stable_clockevent_device); +static inline struct core_data *get_core_data(int cpu); + +static int min_freq_level; +static int max_freq_level; +static int max_upper_index; +static int max_boost_freq; + +/* threshold of core's get into msa */ +static int msa_count_threshold = 200; +/* threshold of core's get into lasx */ +static int lasx_count_threshold = 200; +/* other cores' upper load threshold when 1 core get into boost mode and enable msa/lasx */ +static int load_threshold = 60; + +DEFINE_PER_CPU(unsigned long, msa_count); +EXPORT_PER_CPU_SYMBOL(msa_count); + +#if defined(CONFIG_CPU_HAS_LASX) +DEFINE_PER_CPU(unsigned long, lasx_count); +EXPORT_PER_CPU_SYMBOL(lasx_count); +#endif + +struct ce_update_data { + struct clock_event_device *cd; + unsigned int new_freq; +}; + +static struct kthread_worker cpufreq_worker; +static struct task_struct *cpufreq_thread; +/** + * struct core_data - Store core related information + * @in_boost: the core is boosting to boost_freq + * @cpu: logical cpu of the core + * @update_util The update_util_data pointer of @cpu, is passed to the callback + * function, which will be called by cpufreq_update_util() + * @package The package_data structure the core belonged to + * @work_in_progress @work is busy + * @irq_work to enqueue callback handling on irq workqueue + * @work to enqueue work from irq workqueue on system workqueue + * @perf store frequency table related information from ACPI table + * @max_freq max normal freq of cpu + * @boost_freq max boost freq of cpu + * @clock_scale clock scale to calculate cpu_data[cpu].udelay_val in boost mode + * @package_id package id of core + * @shift clock shift to calculate cpu_data[cpu].udelay_val in boost mode + * @update_util_set if callback has been set for cpufreq_update_util() + * @load current load of the core + * @last_freq_update_time last freq update time + * @freq_update_delay_ns min interval of freq update, which is + * transition_latency configured in ACPI table + * + * following elements are used to calculate load of the core + * @prev_update_time + * @prev_cpu_idle + * @prev_load + * @sampling_rate + * + */ +struct core_data { + bool in_boost; + int cpu; + struct update_util_data update_util; + struct package_data *package; + bool work_in_progress; + struct irq_work irq_work; + struct kthread_work work; + struct acpi_processor_performance *perf; + unsigned int normal_max_freq; + unsigned int *boost_freq; + unsigned int *clock_scale; + unsigned int package_id; + unsigned int *shift; + bool update_util_set; + unsigned long long load; + + u64 last_freq_update_time; + s64 freq_update_delay_ns; + u64 prev_update_time; + u64 prev_cpu_idle; + u32 prev_load; + u32 sampling_rate; +}; + +struct package_data { + int boost_cores; + int max_boost_cores; + int nr_cores; + char in_boost; + int nr_full_load_cores; + struct core_data core[MAX_CORES_PER_PACKAGE]; +} all_package_data[MAX_PACKAGES]; + +static bool boost_supported(void) +{ + return loongson3_cpufreq_driver.set_boost; +} + +/* + * Check if target_freq is a boost freq + * + * target_freq must be a freq in freq table when + * calling the function. + */ +static int boost_level(struct acpi_processor_performance *perf, unsigned int target_freq) +{ + int i; + + for (i = 0; i < perf->state_count; i++) { + if (target_freq == (perf->states[i].core_frequency * 1000)) + return (perf->states[i].control & LOONGSON_BOOST_FREQ_MASK) >> 8; + } + return 0; +} + +#ifdef CONFIG_SMP +static int loongson3_cpu_freq_notifier(struct notifier_block *nb, + unsigned long val, void *data) +{ + struct cpufreq_freqs *freqs; + struct clock_event_device __maybe_unused *cd; + struct core_data *core; + unsigned int __maybe_unused new_freq; + unsigned long cpu; + struct ce_update_data __maybe_unused ce_data; + int cur_boost_level; + + if (val == CPUFREQ_POSTCHANGE) { + freqs = (struct cpufreq_freqs *)data; + cpu = freqs->policy->cpu; + core = get_core_data(cpu); + cur_boost_level = boost_level(core->perf, freqs->new); + if (cur_boost_level != 0) { + lpj_fine = (unsigned int) (((int64_t)core->clock_scale[cur_boost_level] * + cpufreq_scale(loops_per_jiffy, boost_freqs[cur_boost_level] * 1000, + freqs->new)) / core->shift[cur_boost_level]); + } else { + lpj_fine = + cpufreq_scale(loops_per_jiffy, core->normal_max_freq * 1000, freqs->new); + } + } + + return 0; +} +#else +static int loongson3_cpu_freq_notifier(struct notifier_block *nb, + unsigned long val, void *data) +{ + struct cpufreq_freqs *freqs; + struct clock_event_device __maybe_unused *cd; + struct core_data *core; + unsigned int __maybe_unused new_freq; + unsigned long cpu; + int cur_boost_level; + + if (val == CPUFREQ_POSTCHANGE) { + + freqs = (struct cpufreq_freqs *)data; + cpu = freqs->cpu; + core = get_core_data(cpu); + cur_boost_level = boost_level(core->perf, target_freq); + + if (cur_boost_level != 0) { + lpj_fine = (unsigned int) (((int64_t)core->clock_scale[cur_boost_level] * + loops_per_jiffy) / core->shift[cur_boost_level]); + } else { + lpj_fine = loops_per_jiffy; + } + } + + return 0; +} +#endif +static struct notifier_block loongson3_cpufreq_notifier_block = { + .notifier_call = loongson3_cpu_freq_notifier +}; + +static int cpufreq_perf_find_level(struct acpi_processor_performance *perf, + unsigned int target_freq, + unsigned int boost_level) +{ + int i; + + for (i = 0; i < perf->state_count; i++) { + if (boost_level) { + if (perf->states[i].control & LOONGSON_BOOST_FREQ_MASK) { + if (target_freq == (perf->states[i].core_frequency * 1000)) + return perf->states[i].control & LOONGSON_CONTROL_MASK; + } + } else { + if (!(perf->states[i].control & LOONGSON_BOOST_FREQ_MASK)) + if (target_freq == (perf->states[i].core_frequency * 1000)) + return perf->states[i].control; + } + } + return 0; +} + +static int cpufreq_perf_find_freq(struct acpi_processor_performance *perf, + unsigned int target_index, + unsigned int boost_level) +{ + int i; + + for (i = 0; i < perf->state_count; i++) { + if (boost_level) { + if (perf->states[i].control & LOONGSON_BOOST_FREQ_MASK) + if (target_index == (perf->states[i].control & LOONGSON_CONTROL_MASK)) + return perf->states[i].core_frequency; + } else { + if (!(perf->states[i].control & LOONGSON_BOOST_FREQ_MASK)) + if (target_index == perf->states[i].control) + return perf->states[i].core_frequency; + } + } + + return 0; +} + + +static inline struct core_data *get_core_data(int cpu) +{ + int package_id = cpu_data[cpu].package; + struct package_data *package = &all_package_data[package_id]; + int core_id = cpu_logical_map(cpu) % package->nr_cores; + + return &package->core[core_id]; +} + +static bool package_boost(struct package_data *package) +{ + int i; + int cur_full_load = 0; + +#if defined(CONFIG_CPU_HAS_LASX) + int lasx_enable_count = 0; + unsigned long lasx_num; + bool clear_lasx = false; +#endif + + int msa_enable_count = 0; + unsigned long msa_num; + bool clear_msa = false; + + for (i = 0; i < package->nr_cores; i++) { + +#if defined(CONFIG_CPU_HAS_LASX) + lasx_num = per_cpu(lasx_count, package->core[i].cpu); + + if (lasx_num) + lasx_enable_count++; + + if (lasx_num >= lasx_count_threshold) + clear_lasx = true; + + pr_debug("%s: lasx enabled, i %d, cpu %d, lasx_num %lu\n", + __func__, i, package->core[i].cpu, lasx_num); +#endif + msa_num = per_cpu(msa_count, package->core[i].cpu); + + if (msa_num) + msa_enable_count++; + + if (msa_num >= msa_count_threshold) + clear_msa = true; + + pr_debug("%s: msa enabled, i %d, cpu %d, msa_num %lu\n", + __func__, i, package->core[i].cpu, msa_num); + + if (package->core[i].prev_load >= load_threshold) + cur_full_load++; + } + +#if defined(CONFIG_CPU_HAS_LASX) + if (clear_lasx) { + for (i = 0; i < package->nr_cores; i++) + per_cpu(lasx_count, package->core[i].cpu) = 0; + } +#endif + + if (clear_msa) { + for (i = 0; i < package->nr_cores; i++) + per_cpu(msa_count, package->core[i].cpu) = 0; + } + +#if defined(CONFIG_CPU_HAS_LASX) + if (lasx_enable_count > 1 + || (lasx_enable_count && package->nr_full_load_cores > 1) + || (lasx_enable_count && cur_full_load > 1)) { + return false; + } +#endif + + if (msa_enable_count > 1 + || (msa_enable_count && package->nr_full_load_cores > 1) + || (msa_enable_count && cur_full_load > 1)) { + return false; + } + + if (package->nr_full_load_cores && + package->nr_full_load_cores <= package->max_boost_cores) + return true; + + return false; +} + +/* + * check if the cpu can be boosted. + * + * call the function after load of cpu updated. + */ +static bool cpu_can_boost(int cpu) +{ + struct core_data *core = get_core_data(cpu); + struct package_data *package = core->package; + + if (package->boost_cores >= package->max_boost_cores) + return false; + if (core->load > BOOST_THRESHOLD) + return true; + + return false; +} + +static void do_set_freq_level(int cpu, int freq_level) +{ + uint32_t message; + uint32_t val; + + message = (0 << 31) | (VOLTAGE_COMMAND << 24) + | ((uint32_t)freq_level << 4) + | (cpu & CPU_ID_FIELD); + iocsr_write32(message, 0x51c); + val = iocsr_read32(0x420); + + val |= 1 << 10; + iocsr_write32(val, 0x420); +} + +static int wait_for_ready_timeout(int64_t timeout) +{ + int ret; + struct timespec64 prev_ts; + struct timespec64 curr_ts; + ktime_t delay = ktime_set(0, 100); + + ktime_get_ts64(&prev_ts); + ktime_get_ts64(&curr_ts); + + ret = -EPERM; + while (((curr_ts.tv_sec - prev_ts.tv_sec) * 1000000000 + (curr_ts.tv_nsec - prev_ts.tv_nsec)) < timeout) { + ktime_get_ts64(&curr_ts); + + if (iocsr_read32(0x51c) & COMPLETE_STATUS) { + ret = 0; + break; + } + + __set_current_state(TASK_UNINTERRUPTIBLE); + schedule_hrtimeout(&delay, HRTIMER_MODE_REL); + } + return ret; +} + +/* Find closest freq to target in a table in ascending order */ +static int cpufreq_table_find_freq_ac(struct cpufreq_policy *policy, + unsigned int target_freq, + int boost_level) +{ + struct cpufreq_frequency_table *table = policy->freq_table; + struct cpufreq_frequency_table *pos; + unsigned int freq; + unsigned int best_freq = 0; + int idx, best = -1; + + cpufreq_for_each_valid_entry_idx(pos, table, idx) { + freq = pos->frequency; + + if (pos->driver_data != boost_level) + continue; + if (freq > policy->max || freq < policy->min) + continue; + if (freq == target_freq) + return freq; + + if (freq < target_freq) { + best = idx; + best_freq = freq; + continue; + } + + /* No freq found below target_freq, return freq above target_freq */ + if (best == -1) + return freq; + + /* Choose the closest freq */ + if (target_freq - table[best].frequency > freq - target_freq) + return freq; + + return best_freq; + } + + return best_freq; +} + +/* Find closest freq to target in a table in descending order */ +static int cpufreq_table_find_freq_dc(struct cpufreq_policy *policy, + unsigned int target_freq, + int boost_level) +{ + struct cpufreq_frequency_table *table = policy->freq_table; + struct cpufreq_frequency_table *pos; + unsigned int freq; + unsigned int best_freq = 0; + int idx, best = -1; + + cpufreq_for_each_valid_entry_idx(pos, table, idx) { + freq = pos->frequency; + + if (pos->driver_data != boost_level) + continue; + if (freq > policy->max || freq < policy->min) + continue; + + if (freq == target_freq) + return freq; + + if (freq > target_freq) { + best = idx; + best_freq = freq; + continue; + } + + /* No freq found above target_freq, return freq below target_freq */ + if (best == -1) + return freq; + + /* Choose the closest freq */ + if (table[best].frequency - target_freq > target_freq - freq) + return freq; + return best_freq; + } + + return best_freq; +} + +/* Works only on sorted freq-tables */ +static int cpufreq_table_find_freq(struct cpufreq_policy *policy, + unsigned int target_freq, + int boost_level) +{ + target_freq = clamp_val(target_freq, policy->min, policy->max); + if (policy->freq_table_sorted == CPUFREQ_TABLE_SORTED_ASCENDING) + return cpufreq_table_find_freq_ac(policy, target_freq, boost_level); + else + return cpufreq_table_find_freq_dc(policy, target_freq, boost_level); +} + +static void transition_end(struct cpufreq_policy *policy, + struct cpufreq_freqs *freqs, bool failed) +{ + if (unlikely(!policy->transition_ongoing)) + return; + cpufreq_freq_transition_end(policy, freqs, failed); +} +static void transition_begin(struct cpufreq_policy *policy, + struct cpufreq_freqs *freqs) +{ + if (unlikely(policy->transition_ongoing)) + cpufreq_freq_transition_end(policy, freqs, true); + + cpufreq_freq_transition_begin(policy, freqs); +} + +static void update_core_boost_info(struct core_data *core, bool boost_set) +{ + core->in_boost = boost_set; + if (boost_set) + core->package->boost_cores++; + else + core->package->boost_cores--; +} + +static unsigned int cores_freq_trans_notify(struct package_data *package, + bool before_trans, + bool trans_failed, + int find_level, + int find_freq, + unsigned int skip_cpumask) +{ + int i; + struct cpufreq_policy *policy; + struct cpufreq_freqs freqs; + unsigned int cores_level = 0; + unsigned int core_level; + + for (i = 0; i < package->nr_cores; i++) { + struct core_data *core = &package->core[i]; + + policy = cpufreq_cpu_get_raw(core->cpu); + if (((1 << i) & skip_cpumask) || !policy) + continue; + freqs.old = policy->cur; + freqs.flags = 0; + + /* find level from normal levels */ + core_level = cpufreq_perf_find_level(core->perf, policy->cur, find_level); + if (!core_level) { + pr_debug("cpu%d policy->cur=%d find_level=%d freq=%d skip_cpumask=%x \n", + policy->cpu, policy->cur, + find_level, find_freq, skip_cpumask); + } + freqs.new = cpufreq_perf_find_freq(core->perf, core_level, find_freq) * 1000; + if (!freqs.new) + pr_debug("%s: find freq error\n", __func__); + + pr_debug("%s: cpu %d, old freq %d, new freq %d, find_level %d, find_freq %d\n", + __func__, policy->cpu, freqs.old, freqs.new, find_level, find_freq); + cores_level |= (core_level << (i << 2)); + + if (before_trans) + transition_begin(policy, &freqs); + else + transition_end(policy, &freqs, trans_failed); + } + return cores_level; +} +static int loongson3_set_freq(struct core_data *core, unsigned long freq, int boost_level) +{ + int ret = 0; + int freq_level; + int phy_cpu; + int target_freq; + struct cpufreq_freqs freqs; + struct cpufreq_policy *policy = cpufreq_cpu_get_raw(core->cpu); + + if (!policy) + return -EINVAL; + + ret = wait_for_ready_timeout(MAX_READY_TIMEOUT); + if (ret) + return ret; + + phy_cpu = cpu_logical_map(core->cpu); + target_freq = cpufreq_table_find_freq(policy, freq, boost_level); + if (!target_freq) + return -1; + if (target_freq == policy->cur) + return -1; + + freqs.flags = 0; + freqs.old = policy->cur; + freqs.new = target_freq; + freq_level = cpufreq_perf_find_level(core->perf, target_freq, boost_level); + if (!freq_level) { + pr_debug("%s: cpu%d freq=%lu targetfreq=%d boost_level=%d find level error\n", + __func__, core->cpu, freq, target_freq, boost_level); + } + + transition_begin(policy, &freqs); + do_set_freq_level(phy_cpu, freq_level); + ret = wait_for_ready_timeout(MAX_READY_TIMEOUT); + transition_end(policy, &freqs, !!ret); + + return ret; +} + +int loongson3_set_mode(int mode, int freq_level) +{ + uint32_t val; + int ret = 0; + uint32_t message; + + ret = wait_for_ready_timeout(MAX_READY_TIMEOUT); + if (ret) + return ret; + + message = mode | (VOLTAGE_COMMAND << 24) | freq_level; + iocsr_write32(message, 0x51c); + val = iocsr_read32(0x420); + val |= 1 << 10; + iocsr_write32(val, 0x420); + return wait_for_ready_timeout(MAX_READY_TIMEOUT); +} + +enum freq_adjust_action { + FAA_NORMAL, + FAA_N2B, + FAA_B2N, + FAA_BOOST, +}; + +static int faa_normal(struct cpufreq_policy *policy, int load) +{ + int ret; + unsigned int freq_next, min_f, max_f; + struct core_data *core = get_core_data(policy->cpu); + + if (!core) + return -1; + + min_f = policy->min; + max_f = policy->max; + freq_next = min_f + load * (max_f - min_f) / 100; + ret = loongson3_set_freq(core, freq_next, 0); + return ret; +} + +static void handle_boost_cores(struct core_data *core, struct package_data *package, + unsigned long target_freq, bool skip_update_and_notify, bool update_core, bool inc_boost) +{ + int boost_level; + int find_level; + int find_freq; + int ret; + int inc_core = inc_boost ? 1 : -1; + + if (boost_gears == 1) { + find_level = 0; + boost_level = boost_gears; + } else { + find_level = package->boost_cores; + if (update_core) + boost_level = package->boost_cores + inc_core; + else + boost_level = package->boost_cores; + } + find_freq = boost_level; + ret = loongson3_set_freq(core, target_freq, boost_level); + if (ret) + return; + + if (skip_update_and_notify) { + if (update_core) + update_core_boost_info(core, inc_boost); + return; + } + + if (boost_gears != 1) { + cores_freq_trans_notify(package, true, false, + find_level, find_freq, 1 << core->cpu); + cores_freq_trans_notify(package, false, false, + find_level, find_freq, 1 << core->cpu); + } + if (update_core) + update_core_boost_info(core, inc_boost); +} + +static void faa_boost(struct cpufreq_policy *policy, int load) +{ + unsigned int min_f, max_f; + struct core_data *core = get_core_data(policy->cpu); + struct package_data *package = core->package; + unsigned long target_freq; + + /* boost cores form n to n + 1 */ + if (core->load > BOOST_THRESHOLD) { + if (package->boost_cores < package->max_boost_cores + && !core->in_boost) { + if (boost_gears == 1) { + target_freq = policy->max; + } else { + target_freq = cpufreq_table_find_freq(policy, policy->max, + package->boost_cores + 1); + if (!target_freq) { + pr_debug("%s: find freq error ,boost_level %d, cur freq %d\n", + __func__, package->boost_cores, policy->max); + } + } + handle_boost_cores(core, package, target_freq, false, true, true); + } + } else { + /* 1. core not in boost, level up but not change pll + * 2. core in boost, boost cores from n to n - 1 + */ + min_f = policy->min; + max_f = policy->max; + target_freq = min_f + load * (max_f - min_f) / 100; + handle_boost_cores(core, package, target_freq, !core->in_boost, core->in_boost, false); + } + + +} + +static void get_boost_cores(struct package_data *package, int *boost_cores, int *boost_count) +{ + struct core_data *core; + struct cpufreq_policy *policy; + int i; + + /* count boost cores */ + for (i = 0; i < package->nr_cores; i++) { + core = &package->core[i]; + policy = cpufreq_cpu_get_raw(core->cpu); + if (!policy) + continue; + + if (cpu_can_boost(core->cpu)) { + if (boost_cores) + *boost_cores |= (1 << i); + + (*boost_count)++; + } + } +} + +static void faa_n2b(struct package_data *package, struct core_data *core) +{ + int boost_cores = 0; + int boost_count = 0; + int freq_level; + int i; + + get_boost_cores(package, &boost_cores, &boost_count); + + if (boost_gears == 1) + boost_count = 1; + + freq_level = cores_freq_trans_notify(package, true, false, + 0, boost_count, 0); + if (!loongson3_set_mode(BOOST_MODE, freq_level)) { + cores_freq_trans_notify(package, false, false, + 0, boost_count, 0); + package->in_boost = true; + for (i = 0; i < package->nr_cores; i++) { + if (boost_cores & (1 << i)) + update_core_boost_info(&package->core[i], true); + } + } else + cores_freq_trans_notify(package, false, true, + 0, boost_count, 0); +} + +static void faa_b2n(struct package_data *package) +{ + int i; + int boost_count = package->boost_cores; + + if (boost_gears == 1) + boost_count = 1; + + cores_freq_trans_notify(package, true, false, + boost_count, 0, 0); + if (!loongson3_set_mode(NORMAL_MODE, 0)) { + cores_freq_trans_notify(package, false, false, + boost_count, 0, 0); + for (i = 0; i < package->nr_cores; i++) { + if (package->core[i].in_boost) + update_core_boost_info(&package->core[i], false); + } + package->in_boost = false; + } else + cores_freq_trans_notify(package, false, true, + boost_count, 0, 0); +} + + +unsigned int load_update(struct core_data *core) +{ + int i; + u64 update_time, cur_idle_time; + unsigned int idle_time, time_elapsed; + unsigned int load = 0; + struct package_data *package = core->package; + + cur_idle_time = get_cpu_idle_time(core->cpu, &update_time, true); + + time_elapsed = update_time - core->prev_update_time; + core->prev_update_time = update_time; + + idle_time = cur_idle_time - core->prev_cpu_idle; + core->prev_cpu_idle = cur_idle_time; + + if (unlikely(!time_elapsed)) { + /* + * That can only happen when this function is called + * twice in a row with a very short interval between the + * calls, so the previous load value can be used then. + */ + load = core->prev_load; + } else if (unlikely((int)idle_time > 2 * core->sampling_rate && + core->prev_load)) { + + load = core->prev_load; + core->prev_load = 0; + } else { + if (time_elapsed >= idle_time) + load = 100 * (time_elapsed - idle_time) / time_elapsed; + else + load = (int)idle_time < 0 ? 100 : 0; + core->prev_load = load; + } + + package->nr_full_load_cores = 0; + for (i = 0; i < package->nr_cores; i++) { + if (package->core[i].load > BOOST_THRESHOLD) + package->nr_full_load_cores++; + } + + return load; +} + +static bool cpufreq_should_update_freq(struct core_data *core, u64 time) +{ + s64 delta_ns; + + delta_ns = time - core->last_freq_update_time; + return delta_ns >= core->freq_update_delay_ns; +} + +static void cpufreq_update(struct cpufreq_policy *policy) +{ + int action; + struct core_data *core; + struct package_data *package; + unsigned long int load; + bool should_be_boost = 0; + + core = get_core_data(policy->cpu); + package = core->package; + + mutex_lock(&boost_mutex[core->package_id]); + + if (!core->update_util_set) { + mutex_unlock(&boost_mutex[core->package_id]); + return; + } + + load = load_update(core); + core->load = (u64)load + ((core->load * FACTOR) >> 32); + + if (cpufreq_boost_enabled()) { + should_be_boost = package_boost(package); + } else { + if (package->in_boost) + should_be_boost = false; + } + + action = (package->in_boost << 1) | should_be_boost; + switch (action) { + case FAA_NORMAL: + faa_normal(policy, load); + break; + case FAA_B2N: + faa_b2n(package); + break; + case FAA_N2B: + faa_n2b(package, core); + break; + case FAA_BOOST: + faa_boost(policy, load); + break; + } + mutex_unlock(&boost_mutex[core->package_id]); +} + +static void set_max_within_limits(struct cpufreq_policy *policy) +{ + struct core_data *core = get_core_data(policy->cpu); + /* + * policy->max <= cpu->pstate.max_freq indecates that + * the boost is disabled, so max freq is in normal range + * + * Skip performance policy with boost enabled!!! + * + */ + if (policy->max <= (core->normal_max_freq * 1000)) { + mutex_lock(&boost_mutex[core->package_id]); + if (!loongson3_set_freq(core, policy->max, 0)) + pr_debug("Set cpu %d to performance mode under normal range.\n", + policy->cpu); + mutex_unlock(&boost_mutex[core->package_id]); + } +} + +static void clear_update_util_hook(unsigned int cpu) +{ + struct core_data *core = get_core_data(cpu); + + if (!core->update_util_set) + return; + + cpufreq_remove_update_util_hook(cpu); + core->update_util_set = false; + synchronize_rcu(); +} + +static void update_util_handler(struct update_util_data *data, u64 time, + unsigned int flags) +{ + struct core_data *core = container_of(data, struct core_data, update_util); + + if (!cpufreq_should_update_freq(core, time)) + return; + if (!core->work_in_progress) { + core->last_freq_update_time = time; + core->work_in_progress = true; + irq_work_queue(&core->irq_work); + } +} +static void set_update_util_hook(unsigned int cpu) +{ + struct core_data *core = get_core_data(cpu); + + if (core->update_util_set) + return; + + cpufreq_add_update_util_hook(cpu, &core->update_util, + update_util_handler); + core->update_util_set = true; +} +static int loongson3_cpufreq_set_policy(struct cpufreq_policy *policy) +{ + if (!policy->cpuinfo.max_freq) + return -ENODEV; + + if (policy->policy == CPUFREQ_POLICY_PERFORMANCE) { + clear_update_util_hook(policy->cpu); + set_max_within_limits(policy); + } else { + set_update_util_hook(policy->cpu); + } + + return 0; +} + +static int loongson3_cpufreq_verify_policy(struct cpufreq_policy_data *policy) +{ + cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, policy->cpuinfo.max_freq); + + return 0; +} + +static void set_boost_freq(bool has) +{ + cpufreq_has_boost_freq = has; +} + +static bool has_boost_freq(void) +{ + return cpufreq_has_boost_freq; +} + +static int compute_scale(int *shift, int dividor, int dividee) +{ + int i; + int result = 0; + int remainder = 0; + int scale_resolution = 8; + + result = dividor / dividee; + remainder = (dividor % dividee) * 10; + + for (i = 0; i < scale_resolution; i++) { + result = result * 10 + remainder / dividee; + remainder = (remainder % dividee) * 10; + *shift *= 10; + } + + return result; +} + +static void cpufreq_work_handler(struct kthread_work *work) +{ + struct core_data *core; + struct cpufreq_policy *policy; + + core = container_of(work, struct core_data, work); + policy = cpufreq_cpu_get_raw(core->cpu); + + if (policy) { + cpufreq_update(policy); + core->work_in_progress = false; + } +} + +static void cpufreq_irq_work(struct irq_work *irq_work) +{ + struct core_data *core = container_of(irq_work, struct core_data, irq_work); + + kthread_queue_work(&cpufreq_worker, &core->work); +} + +static void cpufreq_kthread_stop(void) +{ + kthread_flush_worker(&cpufreq_worker); + kthread_stop(cpufreq_thread); +} +static int cpufreq_kthread_create(void) +{ + struct sched_attr attr = { + .size = sizeof(struct sched_attr), + .sched_policy = SCHED_DEADLINE, + .sched_flags = 0x10000000, + .sched_nice = 0, + .sched_priority = 0, + .sched_runtime = 1000000, + .sched_deadline = 10000000, + .sched_period = 10000000, + }; + int ret; + + kthread_init_worker(&cpufreq_worker); + cpufreq_thread = kthread_create(kthread_worker_fn, &cpufreq_worker, "lsfrq:%d", 0); + if (IS_ERR(cpufreq_thread)) + return PTR_ERR(cpufreq_thread); + + ret = sched_setattr_nocheck(cpufreq_thread, &attr); + if (ret) { + kthread_stop(cpufreq_thread); + pr_warn("%s: failed to set SCHED_DEADLINE\n", __func__); + return ret; + } + + wake_up_process(cpufreq_thread); + + return 0; +} + +static int init_acpi(struct acpi_processor_performance *perf) +{ + int result = 0; + int i; + + perf->shared_type = 0; + perf->state_count = (max_freq_level - min_freq_level + 1) * (boost_gears + 1); + + perf->states = + kmalloc_array(perf->state_count, + sizeof(struct acpi_processor_px), + GFP_KERNEL); + + if (!perf->states) { + result = -ENOMEM; + return result; + } + + for (i = 0; i < perf->state_count; i++) { + perf->states[i].power = 0x3A98; + perf->states[i].transition_latency = 10000; + perf->states[i].bus_master_latency = 10000; + perf->states[i].status = (RESERVED_FREQ + i / (boost_gears + 1)); + perf->states[i].control = (RESERVED_FREQ + i / (boost_gears + 1)); + + switch (i % (boost_gears + 1)) { + case 0: + perf->states[i].core_frequency = (cpu_clock_freq / 1000000) * (8 - i / (boost_gears + 1)) / 8; + break; + case 1: + case 2: + case 3: + case 4: + perf->states[i].core_frequency = + boost_freqs[i % (boost_gears + 1)] * (8 - i / (boost_gears + 1)) / 8; + perf->states[i].control |= ((i % (boost_gears + 1)) << 8); + break; + default: + pr_info("%s: i %d freq table error\n", __func__, i); + } + } + + return result; +} + +static int loongson3_cpufreq_cpu_init(struct cpufreq_policy *policy) +{ + unsigned int i; + struct acpi_processor_performance *perf; + struct cpufreq_frequency_table *freq_table; + struct core_data *core; + int package_id; + unsigned int cpu = policy->cpu; + unsigned int result = 0; + + perf = per_cpu_ptr(acpi_perf_data, cpu); + package_id = cpu_data[cpu].package; + core = get_core_data(cpu); + all_package_data[package_id].nr_cores = loongson_sysconf.cores_per_package; + all_package_data[package_id].max_boost_cores = max_boost_cores; + core->normal_max_freq = 0; + all_package_data[package_id].nr_full_load_cores = 0; + core->cpu = cpu; + core->work_in_progress = false; + core->last_freq_update_time = 0; + core->perf = perf; + core->package_id = package_id; + core->package = &all_package_data[package_id]; + + core->boost_freq = kmalloc_array(boost_gears + 1, sizeof(typeof(core->boost_freq)), GFP_KERNEL); + core->clock_scale = kmalloc_array(boost_gears + 1, sizeof(typeof(core->clock_scale)), GFP_KERNEL); + core->shift = kmalloc_array(boost_gears + 1, sizeof(typeof(core->shift)), GFP_KERNEL); + + for (i = 0; i < boost_gears + 1; i++) { + core->boost_freq[i] = boost_freqs[i]; + core->shift[i] = 1; + } + + if (!acpi_disabled) + result = acpi_processor_register_performance(perf, cpu); + else { + result = init_acpi(perf); + policy->shared_type = perf->shared_type; + } + + if (result) { + pr_info("CPU%d acpi_processor_register_performance failed.\n", cpu); + return result; + } + + for (i = 0; i < MAX_PACKAGES; i++) + mutex_init(&boost_mutex[i]); + + /* capability check */ + if (perf->state_count <= 1) { + pr_debug("No P-States\n"); + result = -ENODEV; + goto err_unreg; + } + + freq_table = kcalloc(perf->state_count + 1, sizeof(*freq_table), + GFP_KERNEL); + if (!freq_table) { + result = -ENOMEM; + goto err_unreg; + } + + /* detect transition latency */ + policy->cpuinfo.transition_latency = 0; + for (i = 0; i < perf->state_count; i++) { + if ((perf->states[i].transition_latency * 1000) > + policy->cpuinfo.transition_latency) + policy->cpuinfo.transition_latency = + perf->states[i].transition_latency * 1000; + if (perf->states[i].control & LOONGSON_BOOST_FREQ_MASK) { + set_boost_freq(true); + } else { + if (perf->states[i].core_frequency > core->normal_max_freq) + core->normal_max_freq = perf->states[i].core_frequency; + } + } + + core->freq_update_delay_ns = policy->cpuinfo.transition_latency; + + for (i = 0; i < boost_gears + 1; i++) { + core->clock_scale[i] = compute_scale(&core->shift[i], boost_freqs[i], core->normal_max_freq); + pr_debug("%s: boost_freqs[%d] %d, normal_max_freq %d, scale %d, shift %d\n", + __func__, i, boost_freqs[i], core->normal_max_freq, + core->clock_scale[i], core->shift[i]); + } + + /* table init */ + for (i = 0; i < perf->state_count; i++) { + freq_table[i].driver_data = (perf->states[i].control & LOONGSON_BOOST_FREQ_MASK) >> 8; + if (freq_table[i].driver_data) + freq_table[i].flags |= CPUFREQ_BOOST_FREQ; + freq_table[i].frequency = + perf->states[i].core_frequency * 1000; + } + freq_table[i].frequency = CPUFREQ_TABLE_END; + policy->freq_table = freq_table; + perf->state = 0; + + /* add boost-attr if supported. */ + if (has_boost_freq() && boost_supported()) + loongson3_cpufreq_attr[1] = &cpufreq_freq_attr_scaling_boost_freqs; + + pr_info("CPU%u - ACPI performance management activated.\n", cpu); + for (i = 0; i < perf->state_count; i++) + pr_debug(" %cP%d: %d MHz, %d mW, %d uS %d level\n", + (i == perf->state ? '*' : ' '), i, + (u32) perf->states[i].core_frequency, + (u32) perf->states[i].power, + (u32) perf->states[i].transition_latency, + (u32) perf->states[i].control); + + /* + * the first call to ->target() should result in us actually + * writing something to the appropriate registers. + */ + policy->fast_switch_possible = false; + + init_irq_work(&core->irq_work, cpufreq_irq_work); + kthread_init_work(&core->work, cpufreq_work_handler); + core->sampling_rate = max_t(unsigned int, + CPUFREQ_SAMPLING_INTERVAL, + cpufreq_policy_transition_delay_us(policy)); + return result; + +err_unreg: + if (!acpi_disabled) + acpi_processor_unregister_performance(cpu); + + return result; +} + +static int loongson3_cpufreq_cpu_exit(struct cpufreq_policy *policy) +{ + struct core_data *core = get_core_data(policy->cpu); + + clear_update_util_hook(policy->cpu); + irq_work_sync(&core->irq_work); + kthread_cancel_work_sync(&core->work); + core->work_in_progress = false; + policy->fast_switch_possible = false; + if (!acpi_disabled) + acpi_processor_unregister_performance(policy->cpu); + kfree(policy->freq_table); + kfree(core->boost_freq); + kfree(core->clock_scale); + kfree(core->shift); + return 0; +} + +static struct freq_attr *loongson3_cpufreq_attr[] = { + &cpufreq_freq_attr_scaling_available_freqs, + NULL, /* Extra space for boost-attr if supported */ + NULL, +}; + +static struct cpufreq_driver loongson3_cpufreq_driver = { + .verify = loongson3_cpufreq_verify_policy, + .setpolicy = loongson3_cpufreq_set_policy, + .init = loongson3_cpufreq_cpu_init, + .exit = loongson3_cpufreq_cpu_exit, + .name = "acpi-cpufreq", + .attr = loongson3_cpufreq_attr, +}; + +static void free_acpi_perf_data(void) +{ + unsigned int i; + + /* Freeing a NULL pointer is OK, and alloc_percpu zeroes. */ + for_each_possible_cpu(i) + free_cpumask_var(per_cpu_ptr(acpi_perf_data, i) + ->shared_cpu_map); + free_percpu(acpi_perf_data); +} + +static int __init loongson3_cpufreq_early_init(void) +{ + unsigned int i; + + acpi_perf_data = alloc_percpu(struct acpi_processor_performance); + if (!acpi_perf_data) + return -ENOMEM; + for_each_possible_cpu(i) { + if (!zalloc_cpumask_var_node( + &per_cpu_ptr(acpi_perf_data, i)->shared_cpu_map, + GFP_KERNEL, cpu_to_node(i))) { + free_acpi_perf_data(); + return -ENOMEM; + } + } + return 0; +} + +static bool support_boost(void) +{ + int message; + int val; + int i; + + if (wait_for_ready_timeout(MAX_READY_TIMEOUT)) + return false; + message = DVFS_INFO << 24; + iocsr_write32(message, 0x51c); + val = iocsr_read32(0x420); + + val |= 1 << 10; + iocsr_write32(val, 0x420); + if (wait_for_ready_timeout(MAX_READY_TIMEOUT)) { + pr_info("%s: not support boost\n", __func__); + return false; + } + + val = iocsr_read32(0x51c); + + min_freq_level = val & DVFS_INFO_MIN_FREQ; + max_freq_level = (val & DVFS_INFO_MAX_FREQ) >> 4; + + if ((val & DVFS_INFO_BOOST_CORE_FREQ) && ((val & DVFS_INFO_BOOST_CORES) >> 20)) { + max_boost_cores = (val & DVFS_INFO_BOOST_CORES) >> 20; + max_boost_freq = ((val & DVFS_INFO_BOOST_CORE_FREQ) >> 8) * 25; + max_upper_index = (val & DVFS_INFO_NORMAL_CORE_UPPER_LIMIT) >> 16; + } else { + boost_gears = 0; + return false; + } + + /* Read boost levels */ + if (wait_for_ready_timeout(MAX_READY_TIMEOUT)) + return false; + + /* for version 1, single boost freq boost */ + message = DVFS_INFO_BOOST_LEVEL << 24; + iocsr_write32(message, 0x51c); + val = iocsr_read32(0x420); + + val |= 1 << 10; + iocsr_write32(val, 0x420); + + if (wait_for_ready_timeout(MAX_READY_TIMEOUT)) { + pr_info("%s: single boost mode\n", __func__); + boost_gears = 1; + boost_freqs[0] = calc_const_freq() / 1000000; + for (i = 1; i < boost_gears + 1; i++) + boost_freqs[i] = max_boost_freq; + + /* set 0x51c complete */ + iocsr_write32(COMPLETE_STATUS, 0x51c); + } else { + pr_info("%s: multi boost mode\n", __func__); + boost_gears = max_boost_cores; + val = iocsr_read32(0x51c); + + boost_freqs[0] = calc_const_freq() / 1000000; + boost_freqs[1] = max_boost_freq; + + if (boost_gears > 1) { + for (i = 2; i < boost_gears + 1; i++) + boost_freqs[i] = max_boost_freq - (((val >> ((i-2) * 4)) & 0xf) * FREQ_STEP); + } + } + + pr_info("%s: min_freq_level %d, max_freq_level %d, max_boost_cores %d, boost_gears %d\n", + __func__, min_freq_level, max_freq_level, max_boost_cores, boost_gears); + + return true; +} + +static int cpufreq_table_cpuinfo(struct cpufreq_policy *policy, + struct cpufreq_frequency_table *table, + bool boost) +{ + struct cpufreq_frequency_table *pos; + unsigned int min_freq = ~0; + unsigned int max_freq = 0; + unsigned int freq; + + cpufreq_for_each_valid_entry(pos, table) { + freq = pos->frequency; + + if (!boost) { + if (pos->driver_data) + continue; + } + if (freq < min_freq) + min_freq = freq; + if (freq > max_freq) + max_freq = freq; + } + + policy->min = policy->cpuinfo.min_freq = min_freq; + policy->max = policy->cpuinfo.max_freq = max_freq; + if (policy->min == ~0) + return -EINVAL; + else + return 0; +} + +static int set_boost(struct cpufreq_policy *policy, int state) +{ + if (!has_boost_freq()) + return -EINVAL; + + if (!policy) + return -EINVAL; + + if (!state) { + if (policy->policy == CPUFREQ_POLICY_POWERSAVE) + cpufreq_update(policy); + } + if (!policy->freq_table) + return -EINVAL; + + cpufreq_table_cpuinfo(policy, policy->freq_table, state); + down_write(&policy->rwsem); + up_write(&policy->rwsem); + + if (!state) + set_max_within_limits(policy); + + return 0; +} + +static void __init loongson3_cpufreq_boost_init(void) +{ + if (!support_boost()) { + pr_info("Boost capabilities not present in the processor\n"); + return; + } + + loongson3_cpufreq_driver.set_boost = set_boost; +} + +static int cpufreq_supported_detect(void) +{ + return wait_for_ready_timeout(MAX_READY_TIMEOUT); +} + +static int __init loongson3_cpufreq_init(void) +{ + int ret; + + if (!cpu_has_csr || !cpu_has_scalefreq) + return -ENODEV; + + /* don't keep reloading if cpufreq_driver exists */ + if (cpufreq_get_current_driver()) + return -EEXIST; + + if (cpufreq_supported_detect()) { + pr_info("%s failed!\n", __func__); + return -ENODEV; + } + + ret = loongson3_cpufreq_early_init(); + if (ret) + return ret; + loongson3_cpufreq_boost_init(); + + cpufreq_register_notifier(&loongson3_cpufreq_notifier_block, + CPUFREQ_TRANSITION_NOTIFIER); + ret = cpufreq_register_driver(&loongson3_cpufreq_driver); + cpufreq_kthread_create(); + if (ret) + free_acpi_perf_data(); + + return ret; +} + +static void __exit loongson3_cpufreq_exit(void) +{ + cpufreq_unregister_driver(&loongson3_cpufreq_driver); + free_acpi_perf_data(); + cpufreq_kthread_stop(); +} + +late_initcall(loongson3_cpufreq_init); +module_exit(loongson3_cpufreq_exit); + +static const struct acpi_device_id processor_device_ids[] = { + {ACPI_PROCESSOR_OBJECT_HID, }, + {ACPI_PROCESSOR_DEVICE_HID, }, + {}, +}; +MODULE_DEVICE_TABLE(acpi, processor_device_ids); + +MODULE_ALIAS("acpi");

From: Chong Qiao qiaochong@loongson.cn

LoongArch inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I76XQZ

--------------------------------

Signed-off-by: Chong Qiao qiaochong@loongson.cn Signed-off-by: Hongchen Zhang zhanghongchen@loongson.cn --- drivers/char/ipmi/Makefile | 4 + drivers/char/ipmi/btlock.h | 92 +++++++++++++++ drivers/char/ipmi/ipmi_si.h | 11 ++ drivers/char/ipmi/ipmi_si_intf.c | 4 + drivers/char/ipmi/ipmi_si_ls2k500.c | 173 ++++++++++++++++++++++++++++ drivers/char/ipmi/kcs_bmc_ls2k500.h | 67 +++++++++++ drivers/video/fbdev/ls2k500sfb.c | 6 +- 7 files changed, 356 insertions(+), 1 deletion(-) create mode 100644 drivers/char/ipmi/btlock.h create mode 100644 drivers/char/ipmi/ipmi_si_ls2k500.c create mode 100644 drivers/char/ipmi/kcs_bmc_ls2k500.h

diff --git a/drivers/char/ipmi/Makefile b/drivers/char/ipmi/Makefile index cb6138b8ded9..bc9c6506fd59 100644 --- a/drivers/char/ipmi/Makefile +++ b/drivers/char/ipmi/Makefile @@ -13,6 +13,10 @@ ifdef CONFIG_PARISC ipmi_si-y += ipmi_si_parisc.o endif

+ifdef CONFIG_LOONGARCH +ipmi_si-y += ipmi_si_ls2k500.o +endif + obj-$(CONFIG_IPMI_HANDLER) += ipmi_msghandler.o obj-$(CONFIG_IPMI_DEVICE_INTERFACE) += ipmi_devintf.o obj-$(CONFIG_IPMI_SI) += ipmi_si.o diff --git a/drivers/char/ipmi/btlock.h b/drivers/char/ipmi/btlock.h new file mode 100644 index 000000000000..cf585e42d42d --- /dev/null +++ b/drivers/char/ipmi/btlock.h @@ -0,0 +1,92 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __BTLOCK_H__ +#define __BTLOCK_H__ + +#include <linux/delay.h> +#include <asm/timex.h> + +union btlock { + char b[2]; + unsigned int u; +}; + +/* + *wait delay us if lock failed. + *lock fail if another one get lock or both try get lock. + *c must compile b with byte access. + */ +static inline int btlock_lock(volatile union btlock *p, int n, unsigned char delay) +{ + union btlock t, t1; + unsigned long flags; + unsigned long c0 = get_cycles(), c1; + + if (n > 1) + return -1; + delay |= 0x80; + t1.u = 0; + t1.b[n] = delay; + + while (1) { + local_irq_save(flags); + p->b[n] = delay; + t.u = p->u; + if (t.u == t1.u) { + wmb(); /* flush write out immediately */ + local_irq_restore(flags); + return 0; + } + p->b[n] = 0; + t.u = p->u; + wmb(); /* flush write out immediately */ + local_irq_restore(flags); + c1 = get_cycles(); + if (c1 - c0 > *mscycles * 1000) + return -1; + ndelay(((t.b[1 - n] & 0x7f) + (c1 & 1)) * 100); + } + return 0; +} + +static inline int btlock_trylock(volatile union btlock *p, int n, unsigned char delay) +{ + union btlock t, t1; + unsigned long flags; + + if (n > 1) + return -1; + delay |= 0x80; + t1.u = 0; + t1.b[n] = delay; + + local_irq_save(flags); + p->b[n] = delay; + t.u = p->u; + if (t.u == t1.u) { + wmb(); /* flush write out immediately */ + local_irq_restore(flags); + return 0; + } + p->b[n] = 0; + t.u = p->u; + wmb(); /* flush write out immediately */ + local_irq_restore(flags); + ndelay(((t.b[1 - n] & 0x7f) + (get_cycles() & 1)) * 100); + return -1; +} + +static inline int btlock_unlock(volatile union btlock *p, int n) +{ + p->b[n] = 0; + wmb(); /* flush write out immediately */ + return p->u; +} + +static inline int btlock_islocked(volatile union btlock *p, int n) +{ + union btlock t; + + t.u = p->u; + return t.b[n] && !t.b[1 - n]; +} +#endif diff --git a/drivers/char/ipmi/ipmi_si.h b/drivers/char/ipmi/ipmi_si.h index a7ead2a4c753..aa2f81472ce5 100644 --- a/drivers/char/ipmi/ipmi_si.h +++ b/drivers/char/ipmi/ipmi_si.h @@ -51,6 +51,9 @@ struct si_sm_io { unsigned int regshift; enum ipmi_addr_space addr_space; unsigned long addr_data; +#ifdef CONFIG_LOONGARCH + void *addr_source_data; +#endif enum ipmi_addr_src addr_source; /* ACPI, PCI, SMBIOS, hardcode, etc. */ union ipmi_smi_info_union addr_info;

@@ -101,6 +104,14 @@ static inline void ipmi_si_parisc_init(void) { } static inline void ipmi_si_parisc_shutdown(void) { } #endif

+#ifdef CONFIG_LOONGARCH +int ipmi_si_ls2k500_init(void); +void ipmi_si_ls2k500_shutdown(void); +#else +static inline void ipmi_si_ls2k500_init(void) { } +static inline void ipmi_si_ls2k500_shutdown(void) { } +#endif + int ipmi_si_port_setup(struct si_sm_io *io); int ipmi_si_mem_setup(struct si_sm_io *io);

diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c index 5cd031f3fc97..373ee71811e3 100644 --- a/drivers/char/ipmi/ipmi_si_intf.c +++ b/drivers/char/ipmi/ipmi_si_intf.c @@ -2104,6 +2104,8 @@ static int __init init_ipmi_si(void)

ipmi_si_platform_init();

+ ipmi_si_ls2k500_init(); + ipmi_si_pci_init();

ipmi_si_parisc_init(); @@ -2289,6 +2291,8 @@ static void cleanup_ipmi_si(void)

ipmi_si_parisc_shutdown();

+ ipmi_si_ls2k500_shutdown(); + ipmi_si_platform_shutdown();

mutex_lock(&smi_infos_lock); diff --git a/drivers/char/ipmi/ipmi_si_ls2k500.c b/drivers/char/ipmi/ipmi_si_ls2k500.c new file mode 100644 index 000000000000..7e259d85729f --- /dev/null +++ b/drivers/char/ipmi/ipmi_si_ls2k500.c @@ -0,0 +1,173 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * ipmi_si_pci.c + * + * Handling for IPMI devices on the PCI bus. + */ + +#define pr_fmt(fmt) "ipmi_pci: " fmt + +#include <linux/module.h> +#include <linux/types.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/of_platform.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> +#include <linux/pci.h> +#include <linux/ioport.h> +#include <linux/version.h> +#include "ipmi_si.h" +static unsigned long *mscycles; +static unsigned long *event_jiffies; +#include "kcs_bmc_ls2k500.h" +static int resetbootwait = 60; +module_param(resetbootwait, int, 0664); + +#define KCS_STATUS_CMD_DAT BIT(3) + +static int pcie_busy(void) +{ + if (time_before(jiffies, *event_jiffies + resetbootwait*HZ)) + return -1; + return 0; +} + +static unsigned char intf_sim_inb(const struct si_sm_io *io, + unsigned int offset) +{ + IPMIKCS *ik = io->addr_source_data; + uint32_t ret; + + if (pcie_busy()) + return 0; + if (btlock_lock(&ik->lock, 0, 1) < 0) + return 0; + switch (offset & 1) { + case 0: + ret = ik->data_out_reg; + IPMI_KCS_SET_OBF(ik->status_reg, 0); + break; + case 1: + ret = ik->status_reg; + break; + } + btlock_unlock(&ik->lock, 0); + return ret; +} + +static void intf_sim_outb(const struct si_sm_io *io, unsigned int offset, + unsigned char val) +{ + IPMIKCS *ik = io->addr_source_data; + + if (pcie_busy()) + return; + if (btlock_lock(&ik->lock, 0, 1) < 0) + return; + if (IPMI_KCS_GET_IBF(ik->status_reg)) + goto out; + + switch (offset & 1) { + case 0: + ik->data_in_reg = val; + ik->status_reg &= ~KCS_STATUS_CMD_DAT; + break; + + case 1: + ik->cmd_reg = val; + ik->status_reg |= KCS_STATUS_CMD_DAT; + break; + } + IPMI_KCS_SET_IBF(ik->status_reg, 1); + ik->write_req++; +out: + btlock_unlock(&ik->lock, 0); +} + +static void ipmi_ls2k500_cleanup(struct si_sm_io *io) +{ +} + +int ipmi_si_sim_setup(struct si_sm_io *io) +{ + io->inputb = intf_sim_inb; + io->outputb = intf_sim_outb; + io->io_cleanup = ipmi_ls2k500_cleanup; + return 0; +} + +#define platform_resource_start(dev, bar) ((dev)->resource[(bar)].start) +#define platform_resource_end(dev, bar) ((dev)->resource[(bar)].end) +static int of_ipmi_ls2k500_probe(struct platform_device *pdev) +{ + int rv; + struct si_sm_io io; + void **kcs_data; + + memset(&io, 0, sizeof(io)); + io.addr_source = SI_PLATFORM; + dev_info(&pdev->dev, "probing via ls2k500 platform"); + io.si_type = SI_KCS; + + io.addr_space = IPMI_MEM_ADDR_SPACE; + io.io_setup = ipmi_si_sim_setup; + io.addr_data = pdev->resource[0].start; + io.addr_source_data = ioremap(pdev->resource[0].start, + pdev->resource[0].end - + pdev->resource[0].start + 1); + kcs_data = dev_get_platdata(&pdev->dev); + event_jiffies = kcs_data[0]; + mscycles = kcs_data[1]; + io.dev = &pdev->dev; + io.regspacing = 4; + io.regsize = DEFAULT_REGSIZE; + io.regshift = 0; + io.irq = 0; + if (io.irq) + io.irq_setup = ipmi_std_irq_setup; + + dev_info(&pdev->dev, "%pR regsize %d spacing %d irq %d\n", + &pdev->resource[0], io.regsize, io.regspacing, io.irq); + + rv = ipmi_si_add_smi(&io); + if (rv) + ipmi_si_remove_by_dev(&pdev->dev); + + return rv; +} + +static int ipmi_ls2k500_remove(struct platform_device *pdev) +{ + ipmi_si_remove_by_dev(&pdev->dev); + + return 0; +} + +#define LS2K500_SI_DEVICE_NAME "ipmi_ls2k500_si" +struct platform_driver ipmi_ls2k500_platform_driver = { + .driver = { + .name = LS2K500_SI_DEVICE_NAME, + }, + .probe = of_ipmi_ls2k500_probe, + .remove = ipmi_ls2k500_remove, +}; + +static bool platform_registered; +int ipmi_si_ls2k500_init(void) +{ + int rv; + + rv = platform_driver_register(&ipmi_ls2k500_platform_driver); + if (rv) + pr_err("Unable to register driver: %d\n", rv); + else + platform_registered = true; + return rv; +} + +void ipmi_si_ls2k500_shutdown(void) +{ + if (platform_registered) + platform_driver_unregister(&ipmi_ls2k500_platform_driver); +} diff --git a/drivers/char/ipmi/kcs_bmc_ls2k500.h b/drivers/char/ipmi/kcs_bmc_ls2k500.h new file mode 100644 index 000000000000..86e08a08d41a --- /dev/null +++ b/drivers/char/ipmi/kcs_bmc_ls2k500.h @@ -0,0 +1,67 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __KCS_BMC_LS2K500__ +#define __KCS_BMC_LS2K500__ 1 +#include <linux/list.h> +#include "btlock.h" +#define IPMI_KCS_OBF_BIT 0 +#define IPMI_KCS_IBF_BIT 1 +#define IPMI_KCS_SMS_ATN_BIT 2 +#define IPMI_KCS_CD_BIT 3 + +#define IPMI_KCS_OBF_MASK (1 << IPMI_KCS_OBF_BIT) +#define IPMI_KCS_GET_OBF(d) (((d) >> IPMI_KCS_OBF_BIT) & 0x1) +#define IPMI_KCS_SET_OBF(d, v) ((d) = (((d) & ~IPMI_KCS_OBF_MASK) | \ + (((v) & 1) << IPMI_KCS_OBF_BIT))) +#define IPMI_KCS_IBF_MASK (1 << IPMI_KCS_IBF_BIT) +#define IPMI_KCS_GET_IBF(d) (((d) >> IPMI_KCS_IBF_BIT) & 0x1) +#define IPMI_KCS_SET_IBF(d, v) ((d) = (((d) & ~IPMI_KCS_IBF_MASK) | \ + (((v) & 1) << IPMI_KCS_IBF_BIT))) +#define IPMI_KCS_SMS_ATN_MASK (1 << IPMI_KCS_SMS_ATN_BIT) +#define IPMI_KCS_GET_SMS_ATN(d) (((d) >> IPMI_KCS_SMS_ATN_BIT) & 0x1) +#define IPMI_KCS_SET_SMS_ATN(d, v) ((d) = (((d) & ~IPMI_KCS_SMS_ATN_MASK) | \ + ((v) & 1) << IPMI_KCS_SMS_ATN_BIT)) +#define IPMI_KCS_CD_MASK (1 << IPMI_KCS_CD_BIT) +#define IPMI_KCS_GET_CD(d) (((d) >> IPMI_KCS_CD_BIT) & 0x1) +#define IPMI_KCS_SET_CD(d, v) ((d) = (((d) & ~IPMI_KCS_CD_MASK) | \ + (((v) & 1) << IPMI_KCS_CD_BIT))) + +#define IPMI_KCS_IDLE_STATE 0 +#define IPMI_KCS_READ_STATE 1 +#define IPMI_KCS_WRITE_STATE 2 +#define IPMI_KCS_ERROR_STATE 3 + +#define IPMI_KCS_GET_STATE(d) (((d) >> 6) & 0x3) +#define IPMI_KCS_SET_STATE(d, v) ((d) = ((d) & ~0xc0) | (((v) & 0x3) << 6)) + +#define IPMI_KCS_ABORT_STATUS_CMD 0x60 +#define IPMI_KCS_WRITE_START_CMD 0x61 +#define IPMI_KCS_WRITE_END_CMD 0x62 +#define IPMI_KCS_READ_CMD 0x68 +#define IPMI_KCS_STATUS_NO_ERR 0x00 +#define IPMI_KCS_STATUS_ABORTED_ERR 0x01 +#define IPMI_KCS_STATUS_BAD_CC_ERR 0x02 +#define IPMI_KCS_STATUS_LENGTH_ERR 0x06 +#define KCS_STATUS_CMD_DAT BIT(3) + +typedef struct IPMIKCS { + union btlock lock; + uint8_t status_reg; + uint8_t data_out_reg; + + int16_t data_in_reg; + int16_t cmd_reg; + int16_t reserved2; + + uint32_t write_req; + uint32_t write_ack; + + uint32_t reserved3; + uint32_t reserved4; +} IPMIKCS; + +struct loongson_kcs_bmc { + struct list_head next; + IPMIKCS *kcs; + struct kcs_bmc *bmc; +}; +#endif diff --git a/drivers/video/fbdev/ls2k500sfb.c b/drivers/video/fbdev/ls2k500sfb.c index a3722dcaada0..00a83ea7c1e3 100644 --- a/drivers/video/fbdev/ls2k500sfb.c +++ b/drivers/video/fbdev/ls2k500sfb.c @@ -111,6 +111,7 @@ static void ls2k500sfb_redraw_fn(struct work_struct *work) switch_console(saved_console); }

+static unsigned long event_jiffies; static void ls2k500sfb_events_fn(struct work_struct *work) { struct ls2k500sfb_struct *priv = container_of(work, struct ls2k500sfb_struct, work); @@ -151,6 +152,7 @@ static void ls2k500sfb_events_fn(struct work_struct *work) pci_write_config_dword(ppdev, 0x18, 0); pci_write_config_dword(ppdev, 0x1c, 0); pci_write_config_dword(ppdev, 0x20, 0); + event_jiffies = jiffies; atomic_set(&waiting_for_pciebreak_ipi, 0); wmb(); /* flush all write after change pcie window */ local_bh_enable(); @@ -648,6 +650,7 @@ static struct platform_driver simplefb_driver = { .remove = simplefb_remove, };

+static void *kcs_data[2] = {&event_jiffies, &mscycles}; static int ls2k500sfb_probe(struct pci_dev *dev, const struct pci_device_id *id) { struct simplefb_platform_data mode; @@ -740,7 +743,8 @@ static int ls2k500sfb_probe(struct pci_dev *dev, const struct pci_device_id *id) for (i = 0; i < 5; i++) { res[0].start = phybase + 0x00f00000 + 0x1c*i; res[0].end = phybase + 0x00f00000 + 0x1c*(i+1) - 1; - platform_device_register_simple("ipmi_ls2k500_si", i, res, 1); + platform_device_register_resndata(NULL, "ipmi_ls2k500_si", i, res, 1, + kcs_data, sizeof(kcs_data)); }

return PTR_ERR_OR_ZERO(pd);

From: Chong Qiao qiaochong@loongson.cn

LoongArch inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I76XQZ

--------------------------------

Signed-off-by: Chong Qiao qiaochong@loongson.cn Signed-off-by: Hongchen Zhang zhanghongchen@loongson.cn --- drivers/gpu/drm/loongson/loongson_module.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+)

diff --git a/drivers/gpu/drm/loongson/loongson_module.c b/drivers/gpu/drm/loongson/loongson_module.c index d2a51bd395f6..37b7d97c4e70 100644 --- a/drivers/gpu/drm/loongson/loongson_module.c +++ b/drivers/gpu/drm/loongson/loongson_module.c @@ -19,6 +19,21 @@ module_param_named(vblank, loongson_vblank, int, 0400);

static int __init loongson_module_init(void) { + struct pci_dev *pdev = NULL; + + while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev))) { + /* + * Multiple video card workaround + * + * This integrated video card will always be selected as + * default boot device by vgaarb subsystem. + */ + if (pdev->vendor != PCI_VENDOR_ID_LOONGSON || pdev->device == 0x1a05) { + pr_info("Discrete graphic card detected, abort\n"); + return 0; + } + } + if (!loongson_modeset || video_firmware_drivers_only()) return -ENODEV;