diff options
| -rw-r--r-- | Documentation/cpu-freq/user-guide.txt | 9 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c | 21 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/cpufreq/powernow-k8.c | 44 | ||||
| -rw-r--r-- | drivers/cpufreq/cpufreq.c | 305 | ||||
| -rw-r--r-- | drivers/cpufreq/cpufreq_ondemand.c | 139 | ||||
| -rw-r--r-- | include/linux/cpufreq.h | 10 |
6 files changed, 350 insertions, 178 deletions
diff --git a/Documentation/cpu-freq/user-guide.txt b/Documentation/cpu-freq/user-guide.txt index 5d5f5fa..2a5b850 100644 --- a/Documentation/cpu-freq/user-guide.txt +++ b/Documentation/cpu-freq/user-guide.txt @@ -176,7 +176,9 @@ scaling_governor, and by "echoing" the name of another work on some specific architectures or processors. -cpuinfo_cur_freq : Current speed of the CPU, in KHz. +cpuinfo_cur_freq : Current frequency of the CPU as obtained from + the hardware, in KHz. This is the frequency + the CPU actually runs at. scaling_available_frequencies : List of available frequencies, in KHz. @@ -196,7 +198,10 @@ related_cpus : List of CPUs that need some sort of frequency scaling_driver : Hardware driver for cpufreq. -scaling_cur_freq : Current frequency of the CPU, in KHz. +scaling_cur_freq : Current frequency of the CPU as determined by + the governor and cpufreq core, in KHz. This is + the frequency the kernel thinks the CPU runs + at. If you have selected the "userspace" governor which allows you to set the CPU operating frequency to a specific value, you can read out diff --git a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c index 4109679..7bb676c 100644 --- a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c +++ b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c @@ -526,6 +526,21 @@ static const struct dmi_system_id sw_any_bug_dmi_table[] = { }, { } }; + +static int acpi_cpufreq_blacklist(struct cpuinfo_x86 *c) +{ + /* http://www.intel.com/Assets/PDF/specupdate/314554.pdf + * AL30: A Machine Check Exception (MCE) Occurring during an + * Enhanced Intel SpeedStep Technology Ratio Change May Cause + * Both Processor Cores to Lock Up when HT is enabled*/ + if (c->x86_vendor == X86_VENDOR_INTEL) { + if ((c->x86 == 15) && + (c->x86_model == 6) && + (c->x86_mask == 8) && smt_capable()) + return -ENODEV; + } + return 0; +} #endif static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy) @@ -540,6 +555,12 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy) dprintk("acpi_cpufreq_cpu_init\n"); +#ifdef CONFIG_SMP + result = acpi_cpufreq_blacklist(c); + if (result) + return result; +#endif + data = kzalloc(sizeof(struct acpi_cpufreq_data), GFP_KERNEL); if (!data) return -ENOMEM; diff --git a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c index 2a50ef8..6394aa5 100644 --- a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c +++ b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c @@ -605,9 +605,10 @@ static int check_pst_table(struct powernow_k8_data *data, struct pst_s *pst, return 0; } -static void invalidate_entry(struct powernow_k8_data *data, unsigned int entry) +static void invalidate_entry(struct cpufreq_frequency_table *powernow_table, + unsigned int entry) { - data->powernow_table[entry].frequency = CPUFREQ_ENTRY_INVALID; + powernow_table[entry].frequency = CPUFREQ_ENTRY_INVALID; } static void print_basics(struct powernow_k8_data *data) @@ -854,6 +855,10 @@ static int powernow_k8_cpu_init_acpi(struct powernow_k8_data *data) goto err_out; } + /* fill in data */ + data->numps = data->acpi_data.state_count; + powernow_k8_acpi_pst_values(data, 0); + if (cpu_family == CPU_HW_PSTATE) ret_val = fill_powernow_table_pstate(data, powernow_table); else @@ -866,11 +871,8 @@ static int powernow_k8_cpu_init_acpi(struct powernow_k8_data *data) powernow_table[data->acpi_data.state_count].index = 0; data->powernow_table = powernow_table; - /* fill in data */ - data->numps = data->acpi_data.state_count; if (cpumask_first(cpu_core_mask(data->cpu)) == data->cpu) print_basics(data); - powernow_k8_acpi_pst_values(data, 0); /* notify BIOS that we exist */ acpi_processor_notify_smm(THIS_MODULE); @@ -914,13 +916,13 @@ static int fill_powernow_table_pstate(struct powernow_k8_data *data, "bad value %d.\n", i, index); printk(KERN_ERR PFX "Please report to BIOS " "manufacturer\n"); - invalidate_entry(data, i); + invalidate_entry(powernow_table, i); continue; } rdmsr(MSR_PSTATE_DEF_BASE + index, lo, hi); if (!(hi & HW_PSTATE_VALID_MASK)) { dprintk("invalid pstate %d, ignoring\n", index); - invalidate_entry(data, i); + invalidate_entry(powernow_table, i); continue; } @@ -941,7 +943,6 @@ static int fill_powernow_table_fidvid(struct powernow_k8_data *data, struct cpufreq_frequency_table *powernow_table) { int i; - int cntlofreq = 0; for (i = 0; i < data->acpi_data.state_count; i++) { u32 fid; @@ -970,7 +971,7 @@ static int fill_powernow_table_fidvid(struct powernow_k8_data *data, /* verify frequency is OK */ if ((freq > (MAX_FREQ * 1000)) || (freq < (MIN_FREQ * 1000))) { dprintk("invalid freq %u kHz, ignoring\n", freq); - invalidate_entry(data, i); + invalidate_entry(powernow_table, i); continue; } @@ -978,38 +979,17 @@ static int fill_powernow_table_fidvid(struct powernow_k8_data *data, * BIOSs are using "off" to indicate invalid */ if (vid == VID_OFF) { dprintk("invalid vid %u, ignoring\n", vid); - invalidate_entry(data, i); + invalidate_entry(powernow_table, i); continue; } - /* verify only 1 entry from the lo frequency table */ - if (fid < HI_FID_TABLE_BOTTOM) { - if (cntlofreq) { - /* if both entries are the same, - * ignore this one ... */ - if ((freq != powernow_table[cntlofreq].frequency) || - (index != powernow_table[cntlofreq].index)) { - printk(KERN_ERR PFX - "Too many lo freq table " - "entries\n"); - return 1; - } - - dprintk("double low frequency table entry, " - "ignoring it.\n"); - invalidate_entry(data, i); - continue; - } else - cntlofreq = i; - } - if (freq != (data->acpi_data.states[i].core_frequency * 1000)) { printk(KERN_INFO PFX "invalid freq entries " "%u kHz vs. %u kHz\n", freq, (unsigned int) (data->acpi_data.states[i].core_frequency * 1000)); - invalidate_entry(data, i); + invalidate_entry(powernow_table, i); continue; } } diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 2968ed6..3938c78 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -61,6 +61,8 @@ static DEFINE_SPINLOCK(cpufreq_driver_lock); * are concerned with are online after they get the lock. * - Governor routines that can be called in cpufreq hotplug path should not * take this sem as top level hotplug notifier handler takes this. + * - Lock should not be held across + * __cpufreq_governor(data, CPUFREQ_GOV_STOP); */ static DEFINE_PER_CPU(int, policy_cpu); static DEFINE_PER_CPU(struct rw_semaphore, cpu_policy_rwsem); @@ -686,6 +688,9 @@ static struct attribute *default_attrs[] = { NULL }; +struct kobject *cpufreq_global_kobject; +EXPORT_SYMBOL(cpufreq_global_kobject); + #define to_policy(k) container_of(k, struct cpufreq_policy, kobj) #define to_attr(a) container_of(a, struct freq_attr, attr) @@ -756,92 +761,20 @@ static struct kobj_type ktype_cpufreq = { .release = cpufreq_sysfs_release, }; - -/** - * cpufreq_add_dev - add a CPU device - * - * Adds the cpufreq interface for a CPU device. - * - * The Oracle says: try running cpufreq registration/unregistration concurrently - * with with cpu hotplugging and all hell will break loose. Tried to clean this - * mess up, but more thorough testing is needed. - Mathieu +/* + * Returns: + * Negative: Failure + * 0: Success + * Positive: When we have a managed CPU and the sysfs got symlinked */ -static int cpufreq_add_dev(struct sys_device *sys_dev) +int cpufreq_add_dev_policy(unsigned int cpu, struct cpufreq_policy *policy, + struct sys_device *sys_dev) { - unsigned int cpu = sys_dev->id; int ret = 0; - struct cpufreq_policy new_policy; - struct cpufreq_policy *policy; - struct freq_attr **drv_attr; - struct sys_device *cpu_sys_dev; +#ifdef CONFIG_SMP unsigned long flags; unsigned int j; - if (cpu_is_offline(cpu)) - return 0; - - cpufreq_debug_disable_ratelimit(); - dprintk("adding CPU %u\n", cpu); - -#ifdef CONFIG_SMP - /* check whether a different CPU already registered this - * CPU because it is in the same boat. */ - policy = cpufreq_cpu_get(cpu); - if (unlikely(policy)) { - cpufreq_cpu_put(policy); - cpufreq_debug_enable_ratelimit(); - return 0; - } -#endif - - if (!try_module_get(cpufreq_driver->owner)) { - ret = -EINVAL; - goto module_out; - } - - policy = kzalloc(sizeof(struct cpufreq_policy), GFP_KERNEL); - if (!policy) { - ret = -ENOMEM; - goto nomem_out; - } - if (!alloc_cpumask_var(&policy->cpus, GFP_KERNEL)) { - ret = -ENOMEM; - goto err_free_policy; - } - if (!zalloc_cpumask_var(&policy->related_cpus, GFP_KERNEL)) { - ret = -ENOMEM; - goto err_free_cpumask; - } - - policy->cpu = cpu; - cpumask_copy(policy->cpus, cpumask_of(cpu)); - - /* Initially set CPU itself as the policy_cpu */ - per_cpu(policy_cpu, cpu) = cpu; - ret = (lock_policy_rwsem_write(cpu) < 0); - WARN_ON(ret); - - init_completion(&policy->kobj_unregister); - INIT_WORK(&policy->update, handle_update); - - /* Set governor before ->init, so that driver could check it */ - policy->governor = CPUFREQ_DEFAULT_GOVERNOR; - /* call driver. From then on the cpufreq must be able - * to accept all calls to ->verify and ->setpolicy for this CPU - */ - ret = cpufreq_driver->init(policy); - if (ret) { - dprintk("initialization failed\n"); - goto err_unlock_policy; - } - policy->user_policy.min = policy->min; - policy->user_policy.max = policy->max; - - blocking_notifier_call_chain(&cpufreq_policy_notifier_list, - CPUFREQ_START, policy); - -#ifdef CONFIG_SMP - #ifdef CONFIG_HOTPLUG_CPU if (per_cpu(cpufreq_cpu_governor, cpu)) { policy->governor = per_cpu(cpufreq_cpu_governor, cpu); @@ -872,9 +805,8 @@ static int cpufreq_add_dev(struct sys_device *sys_dev) /* Should not go through policy unlock path */ if (cpufreq_driver->exit) cpufreq_driver->exit(policy); - ret = -EBUSY; cpufreq_cpu_put(managed_policy); - goto err_free_cpumask; + return -EBUSY; } spin_lock_irqsave(&cpufreq_driver_lock, flags); @@ -893,17 +825,62 @@ static int cpufreq_add_dev(struct sys_device *sys_dev) * Call driver->exit() because only the cpu parent of * the kobj needed to call init(). */ - goto out_driver_exit; /* call driver->exit() */ + if (cpufreq_driver->exit) + cpufreq_driver->exit(policy); + + if (!ret) + return 1; + else + return ret; } } #endif - memcpy(&new_policy, policy, sizeof(struct cpufreq_policy)); + return ret; +} + + +/* symlink affected CPUs */ +int cpufreq_add_dev_symlink(unsigned int cpu, struct cpufreq_policy *policy) +{ + unsigned int j; + int ret = 0; + + for_each_cpu(j, policy->cpus) { + struct cpufreq_policy *managed_policy; + struct sys_device *cpu_sys_dev; + + if (j == cpu) + continue; + if (!cpu_online(j)) + continue; + + dprintk("CPU %u already managed, adding link\n", j); + managed_policy = cpufreq_cpu_get(cpu); + cpu_sys_dev = get_cpu_sysdev(j); + ret = sysfs_create_link(&cpu_sys_dev->kobj, &policy->kobj, + "cpufreq"); + if (ret) { + cpufreq_cpu_put(managed_policy); + return ret; + } + } + return ret; +} + +int cpufreq_add_dev_interface(unsigned int cpu, struct cpufreq_policy *policy, + struct sys_device *sys_dev) +{ + struct cpufreq_policy new_policy; + struct freq_attr **drv_attr; + unsigned long flags; + int ret = 0; + unsigned int j; /* prepare interface data */ - ret = kobject_init_and_add(&policy->kobj, &ktype_cpufreq, &sys_dev->kobj, - "cpufreq"); + ret = kobject_init_and_add(&policy->kobj, &ktype_cpufreq, + &sys_dev->kobj, "cpufreq"); if (ret) - goto out_driver_exit; + return ret; /* set up files for this cpu device */ drv_attr = cpufreq_driver->attr; @@ -926,35 +903,20 @@ static int cpufreq_add_dev(struct sys_device *sys_dev) spin_lock_irqsave(&cpufreq_driver_lock, flags); for_each_cpu(j, policy->cpus) { - if (!cpu_online(j)) - continue; + if (!cpu_online(j)) + continue; per_cpu(cpufreq_cpu_data, j) = policy; per_cpu(policy_cpu, j) = policy->cpu; } spin_unlock_irqrestore(&cpufreq_driver_lock, flags); - /* symlink affected CPUs */ - for_each_cpu(j, policy->cpus) { - struct cpufreq_policy *managed_policy; - - if (j == cpu) - continue; - if (!cpu_online(j)) - continue; - - dprintk("CPU %u already managed, adding link\n", j); - managed_policy = cpufreq_cpu_get(cpu); - cpu_sys_dev = get_cpu_sysdev(j); - ret = sysfs_create_link(&cpu_sys_dev->kobj, &policy->kobj, - "cpufreq"); - if (ret) { - cpufreq_cpu_put(managed_policy); - goto err_out_unregister; - } - } + ret = cpufreq_add_dev_symlink(cpu, policy); + if (ret) + goto err_out_kobj_put; - policy->governor = NULL; /* to assure that the starting sequence is - * run in cpufreq_set_policy */ + memcpy(&new_policy, policy, sizeof(struct cpufreq_policy)); + /* assure that the starting sequence is run in __cpufreq_set_policy */ + policy->governor = NULL; /* set default policy */ ret = __cpufreq_set_policy(policy, &new_policy); @@ -963,8 +925,107 @@ static int cpufreq_add_dev(struct sys_device *sys_dev) if (ret) { dprintk("setting policy failed\n"); - goto err_out_unregister; + if (cpufreq_driver->exit) + cpufreq_driver->exit(policy); + } + return ret; + +err_out_kobj_put: + kobject_put(&policy->kobj); + wait_for_completion(&policy->kobj_unregister); + return ret; +} + + +/** + * cpufreq_add_dev - add a CPU device + * + * Adds the cpufreq interface for a CPU device. + * + * The Oracle says: try running cpufreq registration/unregistration concurrently + * with with cpu hotplugging and all hell will break loose. Tried to clean this + * mess up, but more thorough testing is needed. - Mathieu + */ +static int cpufreq_add_dev(struct sys_device *sys_dev) +{ + unsigned int cpu = sys_dev->id; + int ret = 0; + struct cpufreq_policy *policy; + unsigned long flags; + unsigned int j; + + if (cpu_is_offline(cpu)) + return 0; + + cpufreq_debug_disable_ratelimit(); + dprintk("adding CPU %u\n", cpu); + +#ifdef CONFIG_SMP + /* check whether a different CPU already registered this + * CPU because it is in the same boat. */ + policy = cpufreq_cpu_get(cpu); + if (unlikely(policy)) { + cpufreq_cpu_put(policy); + cpufreq_debug_enable_ratelimit(); + return 0; + } +#endif + + if (!try_module_get(cpufreq_driver->owner)) { + ret = -EINVAL; + goto module_out; + } + + ret = -ENOMEM; + policy = kzalloc(sizeof(struct cpufreq_policy), GFP_KERNEL); + if (!policy) + goto nomem_out; + + if (!alloc_cpumask_var(&policy->cpus, GFP_KERNEL)) + goto err_free_policy; + + if (!zalloc_cpumask_var(&policy->related_cpus, GFP_KERNEL)) + goto err_free_cpumask; + + policy->cpu = cpu; + cpumask_copy(policy->cpus, cpumask_of(cpu)); + + /* Initially set CPU itself as the policy_cpu */ + per_cpu(policy_cpu, cpu) = cpu; + ret = (lock_policy_rwsem_write(cpu) < 0); + WARN_ON(ret); + + init_completion(&policy->kobj_unregister); + INIT_WORK(&policy->update, handle_update); + + /* Set governor before ->init, so that driver could check it */ + policy->governor = CPUFREQ_DEFAULT_GOVERNOR; + /* call driver. From then on the cpufreq must be able + * to accept all calls to ->verify and ->setpolicy for this CPU + */ + ret = cpufreq_driver->init(policy); + if (ret) { + dprintk("initialization failed\n"); + goto err_unlock_policy; } + policy->user_policy.min = policy->min; + policy->user_policy.max = policy->max; + + blocking_notifier_call_chain(&cpufreq_policy_notifier_list, + CPUFREQ_START, policy); + + ret = cpufreq_add_dev_policy(cpu, policy, sys_dev); + if (ret) { + if (ret > 0) + /* This is a managed cpu, symlink created, + exit with 0 */ + ret = 0; + goto err_unlock_policy; + } + + ret = cpufreq_add_dev_interface(cpu, policy, sys_dev); + if (ret) + goto err_out_unregister; unlock_policy_rwsem_write(cpu); @@ -982,14 +1043,9 @@ err_out_unregister: per_cpu(cpufreq_cpu_data, j) = NULL; spin_unlock_irqrestore(&cpufreq_driver_lock, flags); -err_out_kobj_put: kobject_put(&policy->kobj); wait_for_completion(&policy->kobj_unregister); -out_driver_exit: - if (cpufreq_driver->exit) - cpufreq_driver->exit(policy); - err_unlock_policy: unlock_policy_rwsem_write(cpu); err_free_cpumask: @@ -1653,8 +1709,17 @@ static int __cpufreq_set_policy(struct cpufreq_policy *data, dprintk("governor switch\n"); /* end old governor */ - if (data->governor) + if (data->governor) { + /* + * Need to release the rwsem around governor + * stop due to lock dependency between + * cancel_delayed_work_sync and the read lock + * taken in the delayed work handler. + */ + unlock_policy_rwsem_write(data->cpu); __cpufreq_governor(data, CPUFREQ_GOV_STOP); + lock_policy_rwsem_write(data->cpu); + } /* start new governor */ data->governor = policy->governor; @@ -1884,7 +1949,11 @@ static int __init cpufreq_core_init(void) per_cpu(policy_cpu, cpu) = -1; init_rwsem(&per_cpu(cpu_policy_rwsem, cpu)); } + + cpufreq_global_kobject = kobject_create_and_add("cpufreq", + &cpu_sysdev_class.kset.kobj); + BUG_ON(!cpufreq_global_kobject); + return 0; } - core_initcall(cpufreq_core_init); diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c index d7a528c..071699d 100644 --- a/drivers/cpufreq/cpufreq_ondemand.c +++ b/drivers/cpufreq/cpufreq_ondemand.c @@ -55,6 +55,18 @@ static unsigned int min_sampling_rate; #define TRANSITION_LATENCY_LIMIT (10 * 1000 * 1000) static void do_dbs_timer(struct work_struct *work); +static int cpufreq_governor_dbs(struct cpufreq_policy *policy, + unsigned int event); + +#ifndef CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND +static +#endif +struct cpufreq_governor cpufreq_gov_ondemand = { + .name = "ondemand", + .governor = cpufreq_governor_dbs, + .max_transition_latency = TRANSITION_LATENCY_LIMIT, + .owner = THIS_MODULE, +}; /* Sampling types */ enum {DBS_NORMAL_SAMPLE, DBS_SUB_SAMPLE}; @@ -207,20 +219,23 @@ static void ondemand_powersave_bias_init(void) } /************************** sysfs interface ************************/ -static ssize_t show_sampling_rate_max(struct cpufreq_policy *policy, char *buf) + +static ssize_t show_sampling_rate_max(struct kobject *kobj, + struct attribute *attr, char *buf) { printk_once(KERN_INFO "CPUFREQ: ondemand sampling_rate_max " "sysfs file is deprecated - used by: %s\n", current->comm); return sprintf(buf, "%u\n", -1U); } -static ssize_t show_sampling_rate_min(struct cpufreq_policy *policy, char *buf) +static ssize_t show_sampling_rate_min(struct kobject *kobj, + struct attribute *attr, char *buf) { return sprintf(buf, "%u\n", min_sampling_rate); } #define define_one_ro(_name) \ -static struct freq_attr _name = \ +static struct global_attr _name = \ __ATTR(_name, 0444, show_##_name, NULL) define_one_ro(sampling_rate_max); @@ -229,7 +244,7 @@ define_one_ro(sampling_rate_min); /* cpufreq_ondemand Governor Tunables */ #define show_one(file_name, object) \ static ssize_t show_##file_name \ -(struct cpufreq_policy *unused, char *buf) \ +(struct kobject *kobj, struct attribute *attr, char *buf) \ { \ return sprintf(buf, "%u\n", dbs_tuners_ins.object); \ } @@ -238,8 +253,38 @@ show_one(up_threshold, up_threshold); show_one(ignore_nice_load, ignore_nice); show_one(powersave_bias, powersave_bias); -static ssize_t store_sampling_rate(struct cpufreq_policy *unused, - const char *buf, size_t count) +/*** delete after deprecation time ***/ + +#define DEPRECATION_MSG(file_name) \ + printk_once(KERN_INFO "CPUFREQ: Per core ondemand sysfs " \ + "interface is deprecated - " #file_name "\n"); + +#define show_one_old(file_name) \ +static ssize_t show_##file_name##_old \ +(struct cpufreq_policy *unused, char *buf) \ +{ \ + printk_once(KERN_INFO "CPUFREQ: Per core ondemand sysfs " \ + "interface is deprecated - " #file_name "\n"); \ + return show_##file_name(NULL, NULL, buf); \ +} +show_one_old(sampling_rate); +show_one_old(up_threshold); +show_one_old(ignore_nice_load); +show_one_old(powersave_bias); +show_one_old(sampling_rate_min); +show_one_old(sampling_rate_max); + +#define define_one_ro_old(object, _name) \ +static struct freq_attr object = \ +__ATTR(_name, 0444, show_##_name##_old, NULL) + +define_one_ro_old(sampling_rate_min_old, sampling_rate_min); +define_one_ro_old(sampling_rate_max_old, sampling_rate_max); + +/*** delete after deprecation time ***/ + +static ssize_t store_sampling_rate(struct kobject *a, struct attribute *b, + const char *buf, size_t count) { unsigned int input; int ret; @@ -254,8 +299,8 @@ static ssize_t store_sampling_rate(struct cpufreq_policy *unused, return count; } -static ssize_t store_up_threshold(struct cpufreq_policy *unused, - const char *buf, size_t count) +static ssize_t store_up_threshold(struct kobject *a, struct attribute *b, + const char *buf, size_t count) { unsigned int input; int ret; @@ -273,8 +318,8 @@ static ssize_t store_up_threshold(struct cpufreq_policy *unused, return count; } -static ssize_t store_ignore_nice_load(struct cpufreq_policy *policy, - const char *buf, size_t count) +static ssize_t store_ignore_nice_load(struct kobject *a, struct attribute *b, + const char *buf, size_t count) { unsigned int input; int ret; @@ -310,8 +355,8 @@ static ssize_t store_ignore_nice_load(struct cpufreq_policy *policy, return count; } -static ssize_t store_powersave_bias(struct cpufreq_policy *unused, - const char *buf, size_t count) +static ssize_t store_powersave_bias(struct kobject *a, struct attribute *b, + const char *buf, size_t count) { unsigned int input; int ret; @@ -332,7 +377,7 @@ static ssize_t store_powersave_bias(struct cpufreq_policy *unused, } #define define_one_rw(_name) \ -static struct freq_attr _name = \ +static struct global_attr _name = \ __ATTR(_name, 0644, show_##_name, store_##_name) define_one_rw(sampling_rate); @@ -355,6 +400,47 @@ static struct attribute_group dbs_attr_group = { .name = "ondemand", }; +/*** delete after deprecation time ***/ + +#define write_one_old(file_name) \ +static ssize_t store_##file_name##_old \ +(struct cpufreq_policy *unused, const char *buf, size_t count) \ +{ \ + printk_once(KERN_INFO "CPUFREQ: Per core ondemand sysfs " \ + "interface is deprecated - " #file_name "\n"); \ + return store_##file_name(NULL, NULL, buf, count); \ +} +write_one_old(sampling_rate); +write_one_old(up_threshold); +write_one_old(ignore_nice_load); +write_one_old(powersave_bias); + +#define define_one_rw_old(object, _name) \ +static struct freq_attr object = \ +__ATTR(_name, 0644, show_##_name##_old, store_##_name##_old) + +define_one_rw_old(sampling_rate_old, sampling_rate); +define_one_rw_old(up_threshold_old, up_threshold); +define_one_rw_old(ignore_nice_load_old, ignore_nice_load); +define_one_rw_old(powersave_bias_old, powersave_bias); + +static struct attribute *dbs_attributes_old[] = { + &sampling_rate_max_old.attr, + &sampling_rate_min_old.attr, + &sampling_rate_old.attr, + &up_threshold_old.attr, + &ignore_nice_load_old.attr, + &powersave_bias_old.attr, + NULL +}; + +static struct attribute_group dbs_attr_group_old = { + .attrs = dbs_attributes_old, + .name = "ondemand", +}; + +/*** delete after deprecation time ***/ + /************************** sysfs end ************************/ static void dbs_check_cpu(struct cpu_dbs_info_s *this_dbs_info) @@ -545,7 +631,7 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy, mutex_lock(&dbs_mutex); - rc = sysfs_create_group(&policy->kobj, &dbs_attr_group); + rc = sysfs_create_group(&policy->kobj, &dbs_attr_group_old); if (rc) { mutex_unlock(&dbs_mutex); return rc; @@ -566,13 +652,20 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy, } this_dbs_info->cpu = cpu; ondemand_powersave_bias_init_cpu(cpu); - mutex_init(&this_dbs_info->timer_mutex); /* * Start the timerschedule work, when this governor * is used for first time */ if (dbs_enable == 1) { unsigned int latency; + + rc = sysfs_create_group(cpufreq_global_kobject, + &dbs_attr_group); + if (rc) { + mutex_unlock(&dbs_mutex); + return rc; + } + /* policy latency is in nS. Convert it to uS first */ latency = policy->cpuinfo.transition_latency / 1000; if (latency == 0) @@ -586,6 +679,7 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy, } mutex_unlock(&dbs_mutex); + mutex_init(&this_dbs_info->timer_mutex); dbs_timer_init(this_dbs_info); break; @@ -593,10 +687,13 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy, dbs_timer_exit(this_dbs_info); mutex_lock(&dbs_mutex); - sysfs_remove_group(&policy->kobj, &dbs_attr_group); + sysfs_remove_group(&policy->kobj, &dbs_attr_group_old); mutex_destroy(&this_dbs_info->timer_mutex); dbs_enable--; mutex_unlock(&dbs_mutex); + if (!dbs_enable) + sysfs_remove_group(cpufreq_global_kobject, + &dbs_attr_group); break; @@ -614,16 +711,6 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy, return 0; } -#ifndef CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND -static -#endif -struct cpufreq_governor cpufreq_gov_ondemand = { - .name = "ondemand", - .governor = cpufreq_governor_dbs, - .max_transition_latency = TRANSITION_LATENCY_LIMIT, - .owner = THIS_MODULE, -}; - static int __init cpufreq_gov_dbs_init(void) { int err; diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h index 1610427..44717eb 100644 --- a/include/linux/cpufreq.h +++ b/include/linux/cpufreq.h @@ -65,6 +65,9 @@ static inline int cpufreq_unregister_notifier(struct notifier_block *nb, struct cpufreq_governor; +/* /sys/devices/system/cpu/cpufreq: entry point for global variables */ +extern struct kobject *cpufreq_global_kobject; + #define CPUFREQ_ETERNAL (-1) struct cpufreq_cpuinfo { unsigned int max_freq; @@ -274,6 +277,13 @@ struct freq_attr { ssize_t (*store)(struct cpufreq_policy *, const char *, size_t count); }; +struct global_attr { + struct attribute attr; + ssize_t (*show)(struct kobject *kobj, + struct attribute *attr, char *buf); + ssize_t (*store)(struct kobject *a, struct attribute *b, + const char *c, size_t count); +}; /********************************************************************* * CPUFREQ 2.6. INTERFACE * |
