diff options
Diffstat (limited to 'drivers/base/topology.c')
| -rw-r--r-- | drivers/base/topology.c | 164 |
1 files changed, 97 insertions, 67 deletions
diff --git a/drivers/base/topology.c b/drivers/base/topology.c index 915810f6237..be7c1fb7c0c 100644 --- a/drivers/base/topology.c +++ b/drivers/base/topology.c @@ -23,69 +23,95 @@ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * */ -#include <linux/sysdev.h> -#include <linux/init.h> #include <linux/mm.h> #include <linux/cpu.h> #include <linux/module.h> +#include <linux/hardirq.h> #include <linux/topology.h> -#define define_one_ro(_name) \ -static SYSDEV_ATTR(_name, 0444, show_##_name, NULL) +#define define_one_ro_named(_name, _func) \ + static DEVICE_ATTR(_name, 0444, _func, NULL) + +#define define_one_ro(_name) \ + static DEVICE_ATTR(_name, 0444, show_##_name, NULL) #define define_id_show_func(name) \ -static ssize_t show_##name(struct sys_device *dev, char *buf) \ +static ssize_t show_##name(struct device *dev, \ + struct device_attribute *attr, char *buf) \ { \ - unsigned int cpu = dev->id; \ - return sprintf(buf, "%d\n", topology_##name(cpu)); \ + return sprintf(buf, "%d\n", topology_##name(dev->id)); \ +} + +#if defined(topology_thread_cpumask) || defined(topology_core_cpumask) || \ + defined(topology_book_cpumask) +static ssize_t show_cpumap(int type, const struct cpumask *mask, char *buf) +{ + ptrdiff_t len = PTR_ALIGN(buf + PAGE_SIZE - 1, PAGE_SIZE) - buf; + int n = 0; + + if (len > 1) { + n = type? + cpulist_scnprintf(buf, len-2, mask) : + cpumask_scnprintf(buf, len-2, mask); + buf[n++] = '\n'; + buf[n] = '\0'; + } + return n; } +#endif -#define define_siblings_show_func(name) \ -static ssize_t show_##name(struct sys_device *dev, char *buf) \ +#define define_siblings_show_map(name) \ +static ssize_t show_##name(struct device *dev, \ + struct device_attribute *attr, char *buf) \ { \ - ssize_t len = -1; \ - unsigned int cpu = dev->id; \ - len = cpumask_scnprintf(buf, NR_CPUS+1, topology_##name(cpu)); \ - return (len + sprintf(buf + len, "\n")); \ + return show_cpumap(0, topology_##name(dev->id), buf); \ } -#ifdef topology_physical_package_id +#define define_siblings_show_list(name) \ +static ssize_t show_##name##_list(struct device *dev, \ + struct device_attribute *attr, \ + char *buf) \ +{ \ + return show_cpumap(1, topology_##name(dev->id), buf); \ +} + +#define define_siblings_show_func(name) \ + define_siblings_show_map(name); define_siblings_show_list(name) + define_id_show_func(physical_package_id); define_one_ro(physical_package_id); -#define ref_physical_package_id_attr &attr_physical_package_id.attr, -#else -#define ref_physical_package_id_attr -#endif -#ifdef topology_core_id define_id_show_func(core_id); define_one_ro(core_id); -#define ref_core_id_attr &attr_core_id.attr, -#else -#define ref_core_id_attr -#endif -#ifdef topology_thread_siblings -define_siblings_show_func(thread_siblings); -define_one_ro(thread_siblings); -#define ref_thread_siblings_attr &attr_thread_siblings.attr, -#else -#define ref_thread_siblings_attr -#endif +define_siblings_show_func(thread_cpumask); +define_one_ro_named(thread_siblings, show_thread_cpumask); +define_one_ro_named(thread_siblings_list, show_thread_cpumask_list); + +define_siblings_show_func(core_cpumask); +define_one_ro_named(core_siblings, show_core_cpumask); +define_one_ro_named(core_siblings_list, show_core_cpumask_list); -#ifdef topology_core_siblings -define_siblings_show_func(core_siblings); -define_one_ro(core_siblings); -#define ref_core_siblings_attr &attr_core_siblings.attr, -#else -#define ref_core_siblings_attr +#ifdef CONFIG_SCHED_BOOK +define_id_show_func(book_id); +define_one_ro(book_id); +define_siblings_show_func(book_cpumask); +define_one_ro_named(book_siblings, show_book_cpumask); +define_one_ro_named(book_siblings_list, show_book_cpumask_list); #endif static struct attribute *default_attrs[] = { - ref_physical_package_id_attr - ref_core_id_attr - ref_thread_siblings_attr - ref_core_siblings_attr + &dev_attr_physical_package_id.attr, + &dev_attr_core_id.attr, + &dev_attr_thread_siblings.attr, + &dev_attr_thread_siblings_list.attr, + &dev_attr_core_siblings.attr, + &dev_attr_core_siblings_list.attr, +#ifdef CONFIG_SCHED_BOOK + &dev_attr_book_id.attr, + &dev_attr_book_siblings.attr, + &dev_attr_book_siblings_list.attr, +#endif NULL }; @@ -95,54 +121,58 @@ static struct attribute_group topology_attr_group = { }; /* Add/Remove cpu_topology interface for CPU device */ -static int __cpuinit topology_add_dev(struct sys_device * sys_dev) +static int topology_add_dev(unsigned int cpu) { - sysfs_create_group(&sys_dev->kobj, &topology_attr_group); - return 0; + struct device *dev = get_cpu_device(cpu); + + return sysfs_create_group(&dev->kobj, &topology_attr_group); } -static int __cpuinit topology_remove_dev(struct sys_device * sys_dev) +static void topology_remove_dev(unsigned int cpu) { - sysfs_remove_group(&sys_dev->kobj, &topology_attr_group); - return 0; + struct device *dev = get_cpu_device(cpu); + + sysfs_remove_group(&dev->kobj, &topology_attr_group); } -static int __cpuinit topology_cpu_callback(struct notifier_block *nfb, - unsigned long action, void *hcpu) +static int topology_cpu_callback(struct notifier_block *nfb, + unsigned long action, void *hcpu) { unsigned int cpu = (unsigned long)hcpu; - struct sys_device *sys_dev; + int rc = 0; - sys_dev = get_cpu_sysdev(cpu); switch (action) { - case CPU_ONLINE: - topology_add_dev(sys_dev); + case CPU_UP_PREPARE: + case CPU_UP_PREPARE_FROZEN: + rc = topology_add_dev(cpu); break; + case CPU_UP_CANCELED: + case CPU_UP_CANCELED_FROZEN: case CPU_DEAD: - topology_remove_dev(sys_dev); + case CPU_DEAD_FROZEN: + topology_remove_dev(cpu); break; } - return NOTIFY_OK; + return notifier_from_errno(rc); } -static struct notifier_block topology_cpu_notifier = +static int topology_sysfs_init(void) { - .notifier_call = topology_cpu_callback, -}; + int cpu; + int rc = 0; -static int __cpuinit topology_sysfs_init(void) -{ - int i; + cpu_notifier_register_begin(); - for_each_online_cpu(i) { - topology_cpu_callback(&topology_cpu_notifier, CPU_ONLINE, - (void *)(long)i); + for_each_online_cpu(cpu) { + rc = topology_add_dev(cpu); + if (rc) + goto out; } + __hotcpu_notifier(topology_cpu_callback, 0); - register_cpu_notifier(&topology_cpu_notifier); - - return 0; +out: + cpu_notifier_register_done(); + return rc; } device_initcall(topology_sysfs_init); - |