X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;ds=sidebyside;f=drivers%2Facpi%2Fprocessor_thermal.c;h=ef34b18f95ca52e50c5bae79c2436d5b76a4d6fb;hb=babd90b274e6b43a7dc7bb08562bf566cbabdbf8;hp=f99ad05cd6a2b9575f51d5bf2f9fdbe81f3cc675;hpb=9caafa6c8686e319cf4d5f3757b3972c6c522b7c;p=linux-2.6 diff --git a/drivers/acpi/processor_thermal.c b/drivers/acpi/processor_thermal.c index f99ad05cd6..ef34b18f95 100644 --- a/drivers/acpi/processor_thermal.c +++ b/drivers/acpi/processor_thermal.c @@ -32,6 +32,7 @@ #include #include #include +#include #include @@ -41,9 +42,8 @@ #define ACPI_PROCESSOR_COMPONENT 0x01000000 #define ACPI_PROCESSOR_CLASS "processor" -#define ACPI_PROCESSOR_DRIVER_NAME "ACPI Processor Driver" #define _COMPONENT ACPI_PROCESSOR_COMPONENT -ACPI_MODULE_NAME("acpi_processor") +ACPI_MODULE_NAME("processor_thermal"); /* -------------------------------------------------------------------------- Limit Interface @@ -54,13 +54,12 @@ static int acpi_processor_apply_limit(struct acpi_processor *pr) u16 px = 0; u16 tx = 0; - ACPI_FUNCTION_TRACE("acpi_processor_apply_limit"); if (!pr) - return_VALUE(-EINVAL); + return -EINVAL; if (!pr->flags.limit) - return_VALUE(-ENODEV); + return -ENODEV; if (pr->flags.throttling) { if (pr->limit.user.tx > tx) @@ -82,9 +81,9 @@ static int acpi_processor_apply_limit(struct acpi_processor *pr) end: if (result) - ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unable to set limit\n")); + printk(KERN_ERR PREFIX "Unable to set limit\n"); - return_VALUE(result); + return result; } #ifdef CONFIG_CPU_FREQ @@ -95,7 +94,10 @@ static int acpi_processor_apply_limit(struct acpi_processor *pr) * _any_ cpufreq driver and not only the acpi-cpufreq driver. */ -static unsigned int cpufreq_thermal_reduction_pctg[NR_CPUS]; +#define CPUFREQ_THERMAL_MIN_STEP 0 +#define CPUFREQ_THERMAL_MAX_STEP 3 + +static DEFINE_PER_CPU(unsigned int, cpufreq_thermal_reduction_pctg); static unsigned int acpi_thermal_cpufreq_is_init = 0; static int cpu_has_cpufreq(unsigned int cpu) @@ -111,8 +113,9 @@ static int acpi_thermal_cpufreq_increase(unsigned int cpu) if (!cpu_has_cpufreq(cpu)) return -ENODEV; - if (cpufreq_thermal_reduction_pctg[cpu] < 60) { - cpufreq_thermal_reduction_pctg[cpu] += 20; + if (per_cpu(cpufreq_thermal_reduction_pctg, cpu) < + CPUFREQ_THERMAL_MAX_STEP) { + per_cpu(cpufreq_thermal_reduction_pctg, cpu)++; cpufreq_update_policy(cpu); return 0; } @@ -125,13 +128,14 @@ static int acpi_thermal_cpufreq_decrease(unsigned int cpu) if (!cpu_has_cpufreq(cpu)) return -ENODEV; - if (cpufreq_thermal_reduction_pctg[cpu] > 20) - cpufreq_thermal_reduction_pctg[cpu] -= 20; + if (per_cpu(cpufreq_thermal_reduction_pctg, cpu) > + (CPUFREQ_THERMAL_MIN_STEP + 1)) + per_cpu(cpufreq_thermal_reduction_pctg, cpu)--; else - cpufreq_thermal_reduction_pctg[cpu] = 0; + per_cpu(cpufreq_thermal_reduction_pctg, cpu) = 0; cpufreq_update_policy(cpu); /* We reached max freq again and can leave passive mode */ - return !cpufreq_thermal_reduction_pctg[cpu]; + return !per_cpu(cpufreq_thermal_reduction_pctg, cpu); } static int acpi_thermal_cpufreq_notifier(struct notifier_block *nb, @@ -143,9 +147,10 @@ static int acpi_thermal_cpufreq_notifier(struct notifier_block *nb, if (event != CPUFREQ_ADJUST) goto out; - max_freq = - (policy->cpuinfo.max_freq * - (100 - cpufreq_thermal_reduction_pctg[policy->cpu])) / 100; + max_freq = ( + policy->cpuinfo.max_freq * + (100 - per_cpu(cpufreq_thermal_reduction_pctg, policy->cpu) * 20) + ) / 100; cpufreq_verify_within_limits(policy, 0, max_freq); @@ -157,12 +162,39 @@ static struct notifier_block acpi_thermal_cpufreq_notifier_block = { .notifier_call = acpi_thermal_cpufreq_notifier, }; +static int cpufreq_get_max_state(unsigned int cpu) +{ + if (!cpu_has_cpufreq(cpu)) + return 0; + + return CPUFREQ_THERMAL_MAX_STEP; +} + +static int cpufreq_get_cur_state(unsigned int cpu) +{ + if (!cpu_has_cpufreq(cpu)) + return 0; + + return per_cpu(cpufreq_thermal_reduction_pctg, cpu); +} + +static int cpufreq_set_cur_state(unsigned int cpu, int state) +{ + if (!cpu_has_cpufreq(cpu)) + return 0; + + per_cpu(cpufreq_thermal_reduction_pctg, cpu) = state; + cpufreq_update_policy(cpu); + return 0; +} + void acpi_thermal_cpufreq_init(void) { int i; - for (i = 0; i < NR_CPUS; i++) - cpufreq_thermal_reduction_pctg[i] = 0; + for (i = 0; i < nr_cpu_ids; i++) + if (cpu_present(i)) + per_cpu(cpufreq_thermal_reduction_pctg, i) = 0; i = cpufreq_register_notifier(&acpi_thermal_cpufreq_notifier_block, CPUFREQ_POLICY_NOTIFIER); @@ -181,6 +213,20 @@ void acpi_thermal_cpufreq_exit(void) } #else /* ! CONFIG_CPU_FREQ */ +static int cpufreq_get_max_state(unsigned int cpu) +{ + return 0; +} + +static int cpufreq_get_cur_state(unsigned int cpu) +{ + return 0; +} + +static int cpufreq_set_cur_state(unsigned int cpu, int state) +{ + return 0; +} static int acpi_thermal_cpufreq_increase(unsigned int cpu) { @@ -200,19 +246,18 @@ int acpi_processor_set_thermal_limit(acpi_handle handle, int type) struct acpi_device *device = NULL; int tx = 0, max_tx_px = 0; - ACPI_FUNCTION_TRACE("acpi_processor_set_thermal_limit"); if ((type < ACPI_PROCESSOR_LIMIT_NONE) || (type > ACPI_PROCESSOR_LIMIT_DECREMENT)) - return_VALUE(-EINVAL); + return -EINVAL; result = acpi_bus_get_device(handle, &device); if (result) - return_VALUE(result); + return result; - pr = (struct acpi_processor *)acpi_driver_data(device); + pr = acpi_driver_data(device); if (!pr) - return_VALUE(-ENODEV); + return -ENODEV; /* Thermal limits are always relative to the current Px/Tx state. */ if (pr->flags.throttling) @@ -289,39 +334,114 @@ int acpi_processor_set_thermal_limit(acpi_handle handle, int type) result = acpi_processor_apply_limit(pr); if (result) - ACPI_DEBUG_PRINT((ACPI_DB_ERROR, - "Unable to set thermal limit\n")); + printk(KERN_ERR PREFIX "Unable to set thermal limit\n"); ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Thermal limit now (P%d:T%d)\n", pr->limit.thermal.px, pr->limit.thermal.tx)); } else result = 0; if (max_tx_px) - return_VALUE(1); + return 1; else - return_VALUE(result); + return result; } int acpi_processor_get_limit_info(struct acpi_processor *pr) { - ACPI_FUNCTION_TRACE("acpi_processor_get_limit_info"); if (!pr) - return_VALUE(-EINVAL); + return -EINVAL; if (pr->flags.throttling) pr->flags.limit = 1; - return_VALUE(0); + return 0; } +/* thermal coolign device callbacks */ +static int acpi_processor_max_state(struct acpi_processor *pr) +{ + int max_state = 0; + + /* + * There exists four states according to + * cpufreq_thermal_reduction_ptg. 0, 1, 2, 3 + */ + max_state += cpufreq_get_max_state(pr->id); + if (pr->flags.throttling) + max_state += (pr->throttling.state_count -1); + + return max_state; +} +static int +processor_get_max_state(struct thermal_cooling_device *cdev, char *buf) +{ + struct acpi_device *device = cdev->devdata; + struct acpi_processor *pr = acpi_driver_data(device); + + if (!device || !pr) + return -EINVAL; + + return sprintf(buf, "%d\n", acpi_processor_max_state(pr)); +} + +static int +processor_get_cur_state(struct thermal_cooling_device *cdev, char *buf) +{ + struct acpi_device *device = cdev->devdata; + struct acpi_processor *pr = acpi_driver_data(device); + int cur_state; + + if (!device || !pr) + return -EINVAL; + + cur_state = cpufreq_get_cur_state(pr->id); + if (pr->flags.throttling) + cur_state += pr->throttling.state; + + return sprintf(buf, "%d\n", cur_state); +} + +static int +processor_set_cur_state(struct thermal_cooling_device *cdev, unsigned int state) +{ + struct acpi_device *device = cdev->devdata; + struct acpi_processor *pr = acpi_driver_data(device); + int result = 0; + int max_pstate; + + if (!device || !pr) + return -EINVAL; + + max_pstate = cpufreq_get_max_state(pr->id); + + if (state > acpi_processor_max_state(pr)) + return -EINVAL; + + if (state <= max_pstate) { + if (pr->flags.throttling && pr->throttling.state) + result = acpi_processor_set_throttling(pr, 0); + cpufreq_set_cur_state(pr->id, state); + } else { + cpufreq_set_cur_state(pr->id, max_pstate); + result = acpi_processor_set_throttling(pr, + state - max_pstate); + } + return result; +} + +struct thermal_cooling_device_ops processor_cooling_ops = { + .get_max_state = processor_get_max_state, + .get_cur_state = processor_get_cur_state, + .set_cur_state = processor_set_cur_state, +}; + /* /proc interface */ static int acpi_processor_limit_seq_show(struct seq_file *seq, void *offset) { struct acpi_processor *pr = (struct acpi_processor *)seq->private; - ACPI_FUNCTION_TRACE("acpi_processor_limit_seq_show"); if (!pr) goto end; @@ -339,7 +459,7 @@ static int acpi_processor_limit_seq_show(struct seq_file *seq, void *offset) pr->limit.thermal.px, pr->limit.thermal.tx); end: - return_VALUE(0); + return 0; } static int acpi_processor_limit_open_fs(struct inode *inode, struct file *file) @@ -353,45 +473,43 @@ static ssize_t acpi_processor_write_limit(struct file * file, size_t count, loff_t * data) { int result = 0; - struct seq_file *m = (struct seq_file *)file->private_data; - struct acpi_processor *pr = (struct acpi_processor *)m->private; + struct seq_file *m = file->private_data; + struct acpi_processor *pr = m->private; char limit_string[25] = { '\0' }; int px = 0; int tx = 0; - ACPI_FUNCTION_TRACE("acpi_processor_write_limit"); if (!pr || (count > sizeof(limit_string) - 1)) { - ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid argument\n")); - return_VALUE(-EINVAL); + return -EINVAL; } if (copy_from_user(limit_string, buffer, count)) { - ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid data\n")); - return_VALUE(-EFAULT); + return -EFAULT; } limit_string[count] = '\0'; if (sscanf(limit_string, "%d:%d", &px, &tx) != 2) { - ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid data format\n")); - return_VALUE(-EINVAL); + printk(KERN_ERR PREFIX "Invalid data format\n"); + return -EINVAL; } if (pr->flags.throttling) { if ((tx < 0) || (tx > (pr->throttling.state_count - 1))) { - ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid tx\n")); - return_VALUE(-EINVAL); + printk(KERN_ERR PREFIX "Invalid tx\n"); + return -EINVAL; } pr->limit.user.tx = tx; } result = acpi_processor_apply_limit(pr); - return_VALUE(count); + return count; } struct file_operations acpi_processor_limit_fops = { + .owner = THIS_MODULE, .open = acpi_processor_limit_open_fs, .read = seq_read, .write = acpi_processor_write_limit,