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powercap / RAPL: abstract per cpu type functions 

RAPL implementations may vary slightly between Core and Atom CPUs. There are
also potential differences among generations of CPUs within the family.

This patch adds a per model structure to abstract the differences such that
variations can be handled cleanly.

Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Jacob Pan 2014-11-07 09:29:25 -08:00 коммит произвёл Rafael J. Wysocki
Родитель 206c5f60a3
Коммит 087e9cbab5
1 изменённых файлов: 35 добавлений и 10 удалений
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45
drivers/powercap/intel_rapl.c
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@ -188,6 +188,15 @@ struct rapl_package {
*/
struct list_head plist;
};
struct rapl_defaults {
int (*check_unit)(struct rapl_package *rp, int cpu);
void (*set_floor_freq)(struct rapl_domain *rd, bool mode);
u64 (*compute_time_window)(struct rapl_package *rp, u64 val,
bool to_raw);
};
static struct rapl_defaults *rapl_defaults;
#define PACKAGE_PLN_INT_SAVED BIT(0)
#define MAX_PRIM_NAME (32)
@ -946,16 +955,28 @@ static void package_power_limit_irq_restore(int package_id)
wrmsr_on_cpu(cpu, MSR_IA32_PACKAGE_THERM_INTERRUPT, l, h);
}
static const struct rapl_defaults rapl_defaults_core = {
};
static const struct rapl_defaults rapl_defaults_atom = {
};
#define RAPL_CPU(_model, _ops) { \
.vendor = X86_VENDOR_INTEL, \
.family = 6, \
.model = _model, \
.driver_data = (kernel_ulong_t)&_ops, \
}
static const struct x86_cpu_id rapl_ids[] = {
{ X86_VENDOR_INTEL, 6, 0x2a},/* Sandy Bridge */
{ X86_VENDOR_INTEL, 6, 0x2d},/* Sandy Bridge EP */
{ X86_VENDOR_INTEL, 6, 0x37},/* Valleyview */
{ X86_VENDOR_INTEL, 6, 0x3a},/* Ivy Bridge */
{ X86_VENDOR_INTEL, 6, 0x3c},/* Haswell */
{ X86_VENDOR_INTEL, 6, 0x3d},/* Broadwell */
{ X86_VENDOR_INTEL, 6, 0x3f},/* Haswell */
{ X86_VENDOR_INTEL, 6, 0x45},/* Haswell ULT */
/* TODO: Add more CPU IDs after testing */
RAPL_CPU(0x2a, rapl_defaults_core),/* Sandy Bridge */
RAPL_CPU(0x2d, rapl_defaults_core),/* Sandy Bridge EP */
RAPL_CPU(0x37, rapl_defaults_atom),/* Valleyview */
RAPL_CPU(0x3a, rapl_defaults_core),/* Ivy Bridge */
RAPL_CPU(0x3c, rapl_defaults_core),/* Haswell */
RAPL_CPU(0x3d, rapl_defaults_core),/* Broadwell */
RAPL_CPU(0x3f, rapl_defaults_core),/* Haswell */
RAPL_CPU(0x45, rapl_defaults_core),/* Haswell ULT */
{}
};
MODULE_DEVICE_TABLE(x86cpu, rapl_ids);
@ -1358,14 +1379,18 @@ static struct notifier_block rapl_cpu_notifier = {
static int __init rapl_init(void)
{
int ret = 0;
const struct x86_cpu_id *id;
if (!x86_match_cpu(rapl_ids)) {
id = x86_match_cpu(rapl_ids);
if (!id) {
pr_err("driver does not support CPU family %d model %d\n",
boot_cpu_data.x86, boot_cpu_data.x86_model);
return -ENODEV;
}
rapl_defaults = (struct rapl_defaults *)id->driver_data;
cpu_notifier_register_begin();
/* prevent CPU hotplug during detection */