X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fia64%2Fkernel%2Ftopology.c;h=687500ddb4b872a59676396dd04cbed4c7a214ef;hb=97bf2856c6014879bd04983a3e9dfcdac1e7fe85;hp=6e5eea19fa672bb0199f997e0888fc91d98ad77c;hpb=76828883507a47dae78837ab5dec5a5b4513c667;p=linux-2.6.git diff --git a/arch/ia64/kernel/topology.c b/arch/ia64/kernel/topology.c index 6e5eea19f..687500ddb 100644 --- a/arch/ia64/kernel/topology.c +++ b/arch/ia64/kernel/topology.c @@ -9,9 +9,10 @@ * 2002/08/07 Erich Focht * Populate cpu entries in sysfs for non-numa systems as well * Intel Corporation - Ashok Raj + * 02/27/2006 Zhang, Yanmin + * Populate cpu cache entries in sysfs for cpu cache info */ -#include #include #include #include @@ -19,47 +20,34 @@ #include #include #include +#include #include #include #include -#ifdef CONFIG_NUMA -static struct node *sysfs_nodes; -#endif static struct ia64_cpu *sysfs_cpus; int arch_register_cpu(int num) { - struct node *parent = NULL; - -#ifdef CONFIG_NUMA - parent = &sysfs_nodes[cpu_to_node(num)]; -#endif /* CONFIG_NUMA */ - -#ifdef CONFIG_ACPI +#if defined (CONFIG_ACPI) && defined (CONFIG_HOTPLUG_CPU) /* - * If CPEI cannot be re-targetted, and this is - * CPEI target, then dont create the control file + * If CPEI can be re-targetted or if this is not + * CPEI target, then it is hotpluggable */ - if (!can_cpei_retarget() && is_cpu_cpei_target(num)) - sysfs_cpus[num].cpu.no_control = 1; + if (can_cpei_retarget() || !is_cpu_cpei_target(num)) + sysfs_cpus[num].cpu.hotpluggable = 1; + map_cpu_to_node(num, node_cpuid[num].nid); #endif - return register_cpu(&sysfs_cpus[num].cpu, num, parent); + return register_cpu(&sysfs_cpus[num].cpu, num); } #ifdef CONFIG_HOTPLUG_CPU void arch_unregister_cpu(int num) { - struct node *parent = NULL; - -#ifdef CONFIG_NUMA - int node = cpu_to_node(num); - parent = &sysfs_nodes[node]; -#endif /* CONFIG_NUMA */ - - return unregister_cpu(&sysfs_cpus[num].cpu, parent); + unregister_cpu(&sysfs_cpus[num].cpu); + unmap_cpu_from_node(num, cpu_to_node(num)); } EXPORT_SYMBOL(arch_register_cpu); EXPORT_SYMBOL(arch_unregister_cpu); @@ -71,26 +59,18 @@ static int __init topology_init(void) int i, err = 0; #ifdef CONFIG_NUMA - sysfs_nodes = kzalloc(sizeof(struct node) * MAX_NUMNODES, GFP_KERNEL); - if (!sysfs_nodes) { - err = -ENOMEM; - goto out; - } - /* * MCD - Do we want to register all ONLINE nodes, or all POSSIBLE nodes? */ for_each_online_node(i) { - if ((err = register_node(&sysfs_nodes[i], i, 0))) + if ((err = register_one_node(i))) goto out; } #endif sysfs_cpus = kzalloc(sizeof(struct ia64_cpu) * NR_CPUS, GFP_KERNEL); - if (!sysfs_cpus) { - err = -ENOMEM; - goto out; - } + if (!sysfs_cpus) + panic("kzalloc in topology_init failed - NR_CPUS too big?"); for_each_present_cpu(i) { if((err = arch_register_cpu(i))) @@ -101,3 +81,364 @@ out: } subsys_initcall(topology_init); + + +/* + * Export cpu cache information through sysfs + */ + +/* + * A bunch of string array to get pretty printing + */ +static const char *cache_types[] = { + "", /* not used */ + "Instruction", + "Data", + "Unified" /* unified */ +}; + +static const char *cache_mattrib[]={ + "WriteThrough", + "WriteBack", + "", /* reserved */ + "" /* reserved */ +}; + +struct cache_info { + pal_cache_config_info_t cci; + cpumask_t shared_cpu_map; + int level; + int type; + struct kobject kobj; +}; + +struct cpu_cache_info { + struct cache_info *cache_leaves; + int num_cache_leaves; + struct kobject kobj; +}; + +static struct cpu_cache_info all_cpu_cache_info[NR_CPUS]; +#define LEAF_KOBJECT_PTR(x,y) (&all_cpu_cache_info[x].cache_leaves[y]) + +#ifdef CONFIG_SMP +static void cache_shared_cpu_map_setup( unsigned int cpu, + struct cache_info * this_leaf) +{ + pal_cache_shared_info_t csi; + int num_shared, i = 0; + unsigned int j; + + if (cpu_data(cpu)->threads_per_core <= 1 && + cpu_data(cpu)->cores_per_socket <= 1) { + cpu_set(cpu, this_leaf->shared_cpu_map); + return; + } + + if (ia64_pal_cache_shared_info(this_leaf->level, + this_leaf->type, + 0, + &csi) != PAL_STATUS_SUCCESS) + return; + + num_shared = (int) csi.num_shared; + do { + for_each_possible_cpu(j) + if (cpu_data(cpu)->socket_id == cpu_data(j)->socket_id + && cpu_data(j)->core_id == csi.log1_cid + && cpu_data(j)->thread_id == csi.log1_tid) + cpu_set(j, this_leaf->shared_cpu_map); + + i++; + } while (i < num_shared && + ia64_pal_cache_shared_info(this_leaf->level, + this_leaf->type, + i, + &csi) == PAL_STATUS_SUCCESS); +} +#else +static void cache_shared_cpu_map_setup(unsigned int cpu, + struct cache_info * this_leaf) +{ + cpu_set(cpu, this_leaf->shared_cpu_map); + return; +} +#endif + +static ssize_t show_coherency_line_size(struct cache_info *this_leaf, + char *buf) +{ + return sprintf(buf, "%u\n", 1 << this_leaf->cci.pcci_line_size); +} + +static ssize_t show_ways_of_associativity(struct cache_info *this_leaf, + char *buf) +{ + return sprintf(buf, "%u\n", this_leaf->cci.pcci_assoc); +} + +static ssize_t show_attributes(struct cache_info *this_leaf, char *buf) +{ + return sprintf(buf, + "%s\n", + cache_mattrib[this_leaf->cci.pcci_cache_attr]); +} + +static ssize_t show_size(struct cache_info *this_leaf, char *buf) +{ + return sprintf(buf, "%uK\n", this_leaf->cci.pcci_cache_size / 1024); +} + +static ssize_t show_number_of_sets(struct cache_info *this_leaf, char *buf) +{ + unsigned number_of_sets = this_leaf->cci.pcci_cache_size; + number_of_sets /= this_leaf->cci.pcci_assoc; + number_of_sets /= 1 << this_leaf->cci.pcci_line_size; + + return sprintf(buf, "%u\n", number_of_sets); +} + +static ssize_t show_shared_cpu_map(struct cache_info *this_leaf, char *buf) +{ + ssize_t len; + cpumask_t shared_cpu_map; + + cpus_and(shared_cpu_map, this_leaf->shared_cpu_map, cpu_online_map); + len = cpumask_scnprintf(buf, NR_CPUS+1, shared_cpu_map); + len += sprintf(buf+len, "\n"); + return len; +} + +static ssize_t show_type(struct cache_info *this_leaf, char *buf) +{ + int type = this_leaf->type + this_leaf->cci.pcci_unified; + return sprintf(buf, "%s\n", cache_types[type]); +} + +static ssize_t show_level(struct cache_info *this_leaf, char *buf) +{ + return sprintf(buf, "%u\n", this_leaf->level); +} + +struct cache_attr { + struct attribute attr; + ssize_t (*show)(struct cache_info *, char *); + ssize_t (*store)(struct cache_info *, const char *, size_t count); +}; + +#ifdef define_one_ro + #undef define_one_ro +#endif +#define define_one_ro(_name) \ + static struct cache_attr _name = \ +__ATTR(_name, 0444, show_##_name, NULL) + +define_one_ro(level); +define_one_ro(type); +define_one_ro(coherency_line_size); +define_one_ro(ways_of_associativity); +define_one_ro(size); +define_one_ro(number_of_sets); +define_one_ro(shared_cpu_map); +define_one_ro(attributes); + +static struct attribute * cache_default_attrs[] = { + &type.attr, + &level.attr, + &coherency_line_size.attr, + &ways_of_associativity.attr, + &attributes.attr, + &size.attr, + &number_of_sets.attr, + &shared_cpu_map.attr, + NULL +}; + +#define to_object(k) container_of(k, struct cache_info, kobj) +#define to_attr(a) container_of(a, struct cache_attr, attr) + +static ssize_t cache_show(struct kobject * kobj, struct attribute * attr, char * buf) +{ + struct cache_attr *fattr = to_attr(attr); + struct cache_info *this_leaf = to_object(kobj); + ssize_t ret; + + ret = fattr->show ? fattr->show(this_leaf, buf) : 0; + return ret; +} + +static struct sysfs_ops cache_sysfs_ops = { + .show = cache_show +}; + +static struct kobj_type cache_ktype = { + .sysfs_ops = &cache_sysfs_ops, + .default_attrs = cache_default_attrs, +}; + +static struct kobj_type cache_ktype_percpu_entry = { + .sysfs_ops = &cache_sysfs_ops, +}; + +static void __cpuinit cpu_cache_sysfs_exit(unsigned int cpu) +{ + kfree(all_cpu_cache_info[cpu].cache_leaves); + all_cpu_cache_info[cpu].cache_leaves = NULL; + all_cpu_cache_info[cpu].num_cache_leaves = 0; + memset(&all_cpu_cache_info[cpu].kobj, 0, sizeof(struct kobject)); + return; +} + +static int __cpuinit cpu_cache_sysfs_init(unsigned int cpu) +{ + u64 i, levels, unique_caches; + pal_cache_config_info_t cci; + int j; + s64 status; + struct cache_info *this_cache; + int num_cache_leaves = 0; + + if ((status = ia64_pal_cache_summary(&levels, &unique_caches)) != 0) { + printk(KERN_ERR "ia64_pal_cache_summary=%ld\n", status); + return -1; + } + + this_cache=kzalloc(sizeof(struct cache_info)*unique_caches, + GFP_KERNEL); + if (this_cache == NULL) + return -ENOMEM; + + for (i=0; i < levels; i++) { + for (j=2; j >0 ; j--) { + if ((status=ia64_pal_cache_config_info(i,j, &cci)) != + PAL_STATUS_SUCCESS) + continue; + + this_cache[num_cache_leaves].cci = cci; + this_cache[num_cache_leaves].level = i + 1; + this_cache[num_cache_leaves].type = j; + + cache_shared_cpu_map_setup(cpu, + &this_cache[num_cache_leaves]); + num_cache_leaves ++; + } + } + + all_cpu_cache_info[cpu].cache_leaves = this_cache; + all_cpu_cache_info[cpu].num_cache_leaves = num_cache_leaves; + + memset(&all_cpu_cache_info[cpu].kobj, 0, sizeof(struct kobject)); + + return 0; +} + +/* Add cache interface for CPU device */ +static int __cpuinit cache_add_dev(struct sys_device * sys_dev) +{ + unsigned int cpu = sys_dev->id; + unsigned long i, j; + struct cache_info *this_object; + int retval = 0; + cpumask_t oldmask; + + if (all_cpu_cache_info[cpu].kobj.parent) + return 0; + + oldmask = current->cpus_allowed; + retval = set_cpus_allowed(current, cpumask_of_cpu(cpu)); + if (unlikely(retval)) + return retval; + + retval = cpu_cache_sysfs_init(cpu); + set_cpus_allowed(current, oldmask); + if (unlikely(retval < 0)) + return retval; + + all_cpu_cache_info[cpu].kobj.parent = &sys_dev->kobj; + kobject_set_name(&all_cpu_cache_info[cpu].kobj, "%s", "cache"); + all_cpu_cache_info[cpu].kobj.ktype = &cache_ktype_percpu_entry; + retval = kobject_register(&all_cpu_cache_info[cpu].kobj); + + for (i = 0; i < all_cpu_cache_info[cpu].num_cache_leaves; i++) { + this_object = LEAF_KOBJECT_PTR(cpu,i); + this_object->kobj.parent = &all_cpu_cache_info[cpu].kobj; + kobject_set_name(&(this_object->kobj), "index%1lu", i); + this_object->kobj.ktype = &cache_ktype; + retval = kobject_register(&(this_object->kobj)); + if (unlikely(retval)) { + for (j = 0; j < i; j++) { + kobject_unregister( + &(LEAF_KOBJECT_PTR(cpu,j)->kobj)); + } + kobject_unregister(&all_cpu_cache_info[cpu].kobj); + cpu_cache_sysfs_exit(cpu); + break; + } + } + return retval; +} + +/* Remove cache interface for CPU device */ +static int __cpuinit cache_remove_dev(struct sys_device * sys_dev) +{ + unsigned int cpu = sys_dev->id; + unsigned long i; + + for (i = 0; i < all_cpu_cache_info[cpu].num_cache_leaves; i++) + kobject_unregister(&(LEAF_KOBJECT_PTR(cpu,i)->kobj)); + + if (all_cpu_cache_info[cpu].kobj.parent) { + kobject_unregister(&all_cpu_cache_info[cpu].kobj); + memset(&all_cpu_cache_info[cpu].kobj, + 0, + sizeof(struct kobject)); + } + + cpu_cache_sysfs_exit(cpu); + + return 0; +} + +/* + * When a cpu is hot-plugged, do a check and initiate + * cache kobject if necessary + */ +static int __cpuinit cache_cpu_callback(struct notifier_block *nfb, + unsigned long action, void *hcpu) +{ + unsigned int cpu = (unsigned long)hcpu; + struct sys_device *sys_dev; + + sys_dev = get_cpu_sysdev(cpu); + switch (action) { + case CPU_ONLINE: + cache_add_dev(sys_dev); + break; + case CPU_DEAD: + cache_remove_dev(sys_dev); + break; + } + return NOTIFY_OK; +} + +static struct notifier_block __cpuinitdata cache_cpu_notifier = +{ + .notifier_call = cache_cpu_callback +}; + +static int __cpuinit cache_sysfs_init(void) +{ + int i; + + for_each_online_cpu(i) { + cache_cpu_callback(&cache_cpu_notifier, CPU_ONLINE, + (void *)(long)i); + } + + register_hotcpu_notifier(&cache_cpu_notifier); + + return 0; +} + +device_initcall(cache_sysfs_init); +