#include <linux/init.h>
#include <linux/cpufreq.h>
-#ifdef CONFIG_X86_ACPI_CPUFREQ_PROC_INTF
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
-#include <linux/mutex.h>
-
-#include <asm/uaccess.h>
+#ifdef CONFIG_X86
+#include <asm/cpufeature.h>
#endif
#include <acpi/acpi_bus.h>
+#include <acpi/acpi_drivers.h>
#include <acpi/processor.h>
-#define ACPI_PROCESSOR_COMPONENT 0x01000000
#define ACPI_PROCESSOR_CLASS "processor"
#define ACPI_PROCESSOR_FILE_PERFORMANCE "performance"
#define _COMPONENT ACPI_PROCESSOR_COMPONENT
* policy is adjusted accordingly.
*/
-static unsigned int ignore_ppc = 0;
-module_param(ignore_ppc, uint, 0644);
+/* ignore_ppc:
+ * -1 -> cpufreq low level drivers not initialized -> _PSS, etc. not called yet
+ * ignore _PPC
+ * 0 -> cpufreq low level drivers initialized -> consider _PPC values
+ * 1 -> ignore _PPC totally -> forced by user through boot param
+ */
+static int ignore_ppc = -1;
+module_param(ignore_ppc, int, 0644);
MODULE_PARM_DESC(ignore_ppc, "If the frequency of your machine gets wrongly" \
"limited by BIOS, this should help");
#define PPC_REGISTERED 1
#define PPC_IN_USE 2
-static int acpi_processor_ppc_status = 0;
+static int acpi_processor_ppc_status;
static int acpi_processor_ppc_notifier(struct notifier_block *nb,
unsigned long event, void *data)
struct acpi_processor *pr;
unsigned int ppc = 0;
- if (ignore_ppc)
+ if (event == CPUFREQ_START && ignore_ppc <= 0) {
+ ignore_ppc = 0;
return 0;
+ }
- mutex_lock(&performance_mutex);
+ if (ignore_ppc)
+ return 0;
if (event != CPUFREQ_INCOMPATIBLE)
- goto out;
+ return 0;
- pr = processors[policy->cpu];
+ mutex_lock(&performance_mutex);
+
+ pr = per_cpu(processors, policy->cpu);
if (!pr || !pr->performance)
goto out;
static int acpi_processor_get_platform_limit(struct acpi_processor *pr)
{
acpi_status status = 0;
- unsigned long ppc = 0;
+ unsigned long long ppc = 0;
if (!pr)
acpi_status status = AE_OK;
acpi_handle handle = NULL;
-
if (!pr || !pr->performance || !pr->handle)
return -EINVAL;
result = acpi_processor_get_performance_control(pr);
if (result)
- return result;
+ goto update_bios;
result = acpi_processor_get_performance_states(pr);
if (result)
- return result;
+ goto update_bios;
return 0;
+
+ /*
+ * Having _PPC but missing frequencies (_PSS, _PCT) is a very good hint that
+ * the BIOS is older than the CPU and does not know its frequencies
+ */
+ update_bios:
+#ifdef CONFIG_X86
+ if (ACPI_SUCCESS(acpi_get_handle(pr->handle, "_PPC", &handle))){
+ if(boot_cpu_has(X86_FEATURE_EST))
+ printk(KERN_WARNING FW_BUG "BIOS needs update for CPU "
+ "frequency support\n");
+ }
+#endif
+ return result;
}
int acpi_processor_notify_smm(struct module *calling_module)
EXPORT_SYMBOL(acpi_processor_notify_smm);
-#ifdef CONFIG_X86_ACPI_CPUFREQ_PROC_INTF
-/* /proc/acpi/processor/../performance interface (DEPRECATED) */
-
-static int acpi_processor_perf_open_fs(struct inode *inode, struct file *file);
-static struct file_operations acpi_processor_perf_fops = {
- .owner = THIS_MODULE,
- .open = acpi_processor_perf_open_fs,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-static int acpi_processor_perf_seq_show(struct seq_file *seq, void *offset)
-{
- struct acpi_processor *pr = seq->private;
- int i;
-
-
- if (!pr)
- goto end;
-
- if (!pr->performance) {
- seq_puts(seq, "<not supported>\n");
- goto end;
- }
-
- seq_printf(seq, "state count: %d\n"
- "active state: P%d\n",
- pr->performance->state_count, pr->performance->state);
-
- seq_puts(seq, "states:\n");
- for (i = 0; i < pr->performance->state_count; i++)
- seq_printf(seq,
- " %cP%d: %d MHz, %d mW, %d uS\n",
- (i == pr->performance->state ? '*' : ' '), i,
- (u32) pr->performance->states[i].core_frequency,
- (u32) pr->performance->states[i].power,
- (u32) pr->performance->states[i].transition_latency);
-
- end:
- return 0;
-}
-
-static int acpi_processor_perf_open_fs(struct inode *inode, struct file *file)
-{
- return single_open(file, acpi_processor_perf_seq_show,
- PDE(inode)->data);
-}
-
-static void acpi_cpufreq_add_file(struct acpi_processor *pr)
-{
- struct acpi_device *device = NULL;
-
-
- if (acpi_bus_get_device(pr->handle, &device))
- return;
-
- /* add file 'performance' [R/W] */
- proc_create_data(ACPI_PROCESSOR_FILE_PERFORMANCE, S_IFREG | S_IRUGO,
- acpi_device_dir(device),
- &acpi_processor_perf_fops, acpi_driver_data(device));
- return;
-}
-
-static void acpi_cpufreq_remove_file(struct acpi_processor *pr)
-{
- struct acpi_device *device = NULL;
-
-
- if (acpi_bus_get_device(pr->handle, &device))
- return;
-
- /* remove file 'performance' */
- remove_proc_entry(ACPI_PROCESSOR_FILE_PERFORMANCE,
- acpi_device_dir(device));
-
- return;
-}
-
-#else
-static void acpi_cpufreq_add_file(struct acpi_processor *pr)
-{
- return;
-}
-static void acpi_cpufreq_remove_file(struct acpi_processor *pr)
-{
- return;
-}
-#endif /* CONFIG_X86_ACPI_CPUFREQ_PROC_INTF */
-
static int acpi_processor_get_psd(struct acpi_processor *pr)
{
int result = 0;
psd = buffer.pointer;
if (!psd || (psd->type != ACPI_TYPE_PACKAGE)) {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _PSD data\n"));
+ printk(KERN_ERR PREFIX "Invalid _PSD data\n");
result = -EFAULT;
goto end;
}
if (psd->package.count != 1) {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _PSD data\n"));
+ printk(KERN_ERR PREFIX "Invalid _PSD data\n");
result = -EFAULT;
goto end;
}
status = acpi_extract_package(&(psd->package.elements[0]),
&format, &state);
if (ACPI_FAILURE(status)) {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _PSD data\n"));
+ printk(KERN_ERR PREFIX "Invalid _PSD data\n");
result = -EFAULT;
goto end;
}
if (pdomain->num_entries != ACPI_PSD_REV0_ENTRIES) {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unknown _PSD:num_entries\n"));
+ printk(KERN_ERR PREFIX "Unknown _PSD:num_entries\n");
result = -EFAULT;
goto end;
}
if (pdomain->revision != ACPI_PSD_REV0_REVISION) {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unknown _PSD:revision\n"));
+ printk(KERN_ERR PREFIX "Unknown _PSD:revision\n");
result = -EFAULT;
goto end;
}
int count, count_target;
int retval = 0;
unsigned int i, j;
- cpumask_t covered_cpus;
+ cpumask_var_t covered_cpus;
struct acpi_processor *pr;
struct acpi_psd_package *pdomain;
struct acpi_processor *match_pr;
struct acpi_psd_package *match_pdomain;
+ if (!alloc_cpumask_var(&covered_cpus, GFP_KERNEL))
+ return -ENOMEM;
+
mutex_lock(&performance_mutex);
retval = 0;
/* Call _PSD for all CPUs */
for_each_possible_cpu(i) {
- pr = processors[i];
+ pr = per_cpu(processors, i);
if (!pr) {
/* Look only at processors in ACPI namespace */
continue;
}
pr->performance = percpu_ptr(performance, i);
- cpu_set(i, pr->performance->shared_cpu_map);
+ cpumask_set_cpu(i, pr->performance->shared_cpu_map);
if (acpi_processor_get_psd(pr)) {
retval = -EINVAL;
continue;
* domain info.
*/
for_each_possible_cpu(i) {
- pr = processors[i];
+ pr = per_cpu(processors, i);
if (!pr)
continue;
}
}
- cpus_clear(covered_cpus);
+ cpumask_clear(covered_cpus);
for_each_possible_cpu(i) {
- pr = processors[i];
+ pr = per_cpu(processors, i);
if (!pr)
continue;
- if (cpu_isset(i, covered_cpus))
+ if (cpumask_test_cpu(i, covered_cpus))
continue;
pdomain = &(pr->performance->domain_info);
- cpu_set(i, pr->performance->shared_cpu_map);
- cpu_set(i, covered_cpus);
+ cpumask_set_cpu(i, pr->performance->shared_cpu_map);
+ cpumask_set_cpu(i, covered_cpus);
if (pdomain->num_processors <= 1)
continue;
if (i == j)
continue;
- match_pr = processors[j];
+ match_pr = per_cpu(processors, j);
if (!match_pr)
continue;
goto err_ret;
}
- cpu_set(j, covered_cpus);
- cpu_set(j, pr->performance->shared_cpu_map);
+ cpumask_set_cpu(j, covered_cpus);
+ cpumask_set_cpu(j, pr->performance->shared_cpu_map);
count++;
}
if (i == j)
continue;
- match_pr = processors[j];
+ match_pr = per_cpu(processors, j);
if (!match_pr)
continue;
match_pr->performance->shared_type =
pr->performance->shared_type;
- match_pr->performance->shared_cpu_map =
- pr->performance->shared_cpu_map;
+ cpumask_copy(match_pr->performance->shared_cpu_map,
+ pr->performance->shared_cpu_map);
}
}
err_ret:
for_each_possible_cpu(i) {
- pr = processors[i];
+ pr = per_cpu(processors, i);
if (!pr || !pr->performance)
continue;
/* Assume no coordination on any error parsing domain info */
if (retval) {
- cpus_clear(pr->performance->shared_cpu_map);
- cpu_set(i, pr->performance->shared_cpu_map);
+ cpumask_clear(pr->performance->shared_cpu_map);
+ cpumask_set_cpu(i, pr->performance->shared_cpu_map);
pr->performance->shared_type = CPUFREQ_SHARED_TYPE_ALL;
}
pr->performance = NULL; /* Will be set for real in register */
}
mutex_unlock(&performance_mutex);
+ free_cpumask_var(covered_cpus);
return retval;
}
EXPORT_SYMBOL(acpi_processor_preregister_performance);
-
int
acpi_processor_register_performance(struct acpi_processor_performance
*performance, unsigned int cpu)
{
struct acpi_processor *pr;
-
if (!(acpi_processor_ppc_status & PPC_REGISTERED))
return -EINVAL;
mutex_lock(&performance_mutex);
- pr = processors[cpu];
+ pr = per_cpu(processors, cpu);
if (!pr) {
mutex_unlock(&performance_mutex);
return -ENODEV;
return -EIO;
}
- acpi_cpufreq_add_file(pr);
-
mutex_unlock(&performance_mutex);
return 0;
}
{
struct acpi_processor *pr;
-
mutex_lock(&performance_mutex);
- pr = processors[cpu];
+ pr = per_cpu(processors, cpu);
if (!pr) {
mutex_unlock(&performance_mutex);
return;
kfree(pr->performance->states);
pr->performance = NULL;
- acpi_cpufreq_remove_file(pr);
-
mutex_unlock(&performance_mutex);
return;
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff