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Message-Id: <1408618794-28497-9-git-send-email-sudeep.holla@arm.com>
Date: Thu, 21 Aug 2014 11:59:51 +0100
From: Sudeep Holla <sudeep.holla@....com>
To: LKML <linux-kernel@...r.kernel.org>
Cc: sudeep.holla@....com, Heiko Carstens <heiko.carstens@...ibm.com>,
Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>,
Stephen Boyd <sboyd@...eaurora.org>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Paul Mackerras <paulus@...ba.org>,
linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH v3 08/11] powerpc: move cacheinfo sysfs to generic cacheinfo infrastructure
From: Sudeep Holla <sudeep.holla@....com>
This patch removes the redundant sysfs cacheinfo code by making use of
the newly introduced generic cacheinfo infrastructure.
Signed-off-by: Sudeep Holla <sudeep.holla@....com>
Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: linuxppc-dev@...ts.ozlabs.org
---
arch/powerpc/kernel/cacheinfo.c | 812 +++++-----------------------------------
arch/powerpc/kernel/cacheinfo.h | 8 -
arch/powerpc/kernel/sysfs.c | 12 +-
3 files changed, 90 insertions(+), 742 deletions(-)
delete mode 100644 arch/powerpc/kernel/cacheinfo.h
diff --git a/arch/powerpc/kernel/cacheinfo.c b/arch/powerpc/kernel/cacheinfo.c
index 40198d50b4c2..6845eb7fcc18 100644
--- a/arch/powerpc/kernel/cacheinfo.c
+++ b/arch/powerpc/kernel/cacheinfo.c
@@ -10,38 +10,10 @@
* 2 as published by the Free Software Foundation.
*/
+#include <linux/cacheinfo.h>
#include <linux/cpu.h>
-#include <linux/cpumask.h>
#include <linux/kernel.h>
-#include <linux/kobject.h>
-#include <linux/list.h>
-#include <linux/notifier.h>
#include <linux/of.h>
-#include <linux/percpu.h>
-#include <linux/slab.h>
-#include <asm/prom.h>
-
-#include "cacheinfo.h"
-
-/* per-cpu object for tracking:
- * - a "cache" kobject for the top-level directory
- * - a list of "index" objects representing the cpu's local cache hierarchy
- */
-struct cache_dir {
- struct kobject *kobj; /* bare (not embedded) kobject for cache
- * directory */
- struct cache_index_dir *index; /* list of index objects */
-};
-
-/* "index" object: each cpu's cache directory has an index
- * subdirectory corresponding to a cache object associated with the
- * cpu. This object's lifetime is managed via the embedded kobject.
- */
-struct cache_index_dir {
- struct kobject kobj;
- struct cache_index_dir *next; /* next index in parent directory */
- struct cache *cache;
-};
/* Template for determining which OF properties to query for a given
* cache type */
@@ -60,11 +32,6 @@ struct cache_type_info {
const char *nr_sets_prop;
};
-/* These are used to index the cache_type_info array. */
-#define CACHE_TYPE_UNIFIED 0
-#define CACHE_TYPE_INSTRUCTION 1
-#define CACHE_TYPE_DATA 2
-
static const struct cache_type_info cache_type_info[] = {
{
/* PowerPC Processor binding says the [di]-cache-*
@@ -92,231 +59,82 @@ static const struct cache_type_info cache_type_info[] = {
},
};
-/* Cache object: each instance of this corresponds to a distinct cache
- * in the system. There are separate objects for Harvard caches: one
- * each for instruction and data, and each refers to the same OF node.
- * The refcount of the OF node is elevated for the lifetime of the
- * cache object. A cache object is released when its shared_cpu_map
- * is cleared (see cache_cpu_clear).
- *
- * A cache object is on two lists: an unsorted global list
- * (cache_list) of cache objects; and a singly-linked list
- * representing the local cache hierarchy, which is ordered by level
- * (e.g. L1d -> L1i -> L2 -> L3).
- */
-struct cache {
- struct device_node *ofnode; /* OF node for this cache, may be cpu */
- struct cpumask shared_cpu_map; /* online CPUs using this cache */
- int type; /* split cache disambiguation */
- int level; /* level not explicit in device tree */
- struct list_head list; /* global list of cache objects */
- struct cache *next_local; /* next cache of >= level */
-};
-
-static DEFINE_PER_CPU(struct cache_dir *, cache_dir_pcpu);
-
-/* traversal/modification of this list occurs only at cpu hotplug time;
- * access is serialized by cpu hotplug locking
- */
-static LIST_HEAD(cache_list);
-
-static struct cache_index_dir *kobj_to_cache_index_dir(struct kobject *k)
-{
- return container_of(k, struct cache_index_dir, kobj);
-}
-
-static const char *cache_type_string(const struct cache *cache)
+static inline int get_cacheinfo_idx(enum cache_type type)
{
- return cache_type_info[cache->type].name;
-}
-
-static void cache_init(struct cache *cache, int type, int level,
- struct device_node *ofnode)
-{
- cache->type = type;
- cache->level = level;
- cache->ofnode = of_node_get(ofnode);
- INIT_LIST_HEAD(&cache->list);
- list_add(&cache->list, &cache_list);
-}
-
-static struct cache *new_cache(int type, int level, struct device_node *ofnode)
-{
- struct cache *cache;
-
- cache = kzalloc(sizeof(*cache), GFP_KERNEL);
- if (cache)
- cache_init(cache, type, level, ofnode);
-
- return cache;
-}
-
-static void release_cache_debugcheck(struct cache *cache)
-{
- struct cache *iter;
-
- list_for_each_entry(iter, &cache_list, list)
- WARN_ONCE(iter->next_local == cache,
- "cache for %s(%s) refers to cache for %s(%s)\n",
- iter->ofnode->full_name,
- cache_type_string(iter),
- cache->ofnode->full_name,
- cache_type_string(cache));
-}
-
-static void release_cache(struct cache *cache)
-{
- if (!cache)
- return;
-
- pr_debug("freeing L%d %s cache for %s\n", cache->level,
- cache_type_string(cache), cache->ofnode->full_name);
-
- release_cache_debugcheck(cache);
- list_del(&cache->list);
- of_node_put(cache->ofnode);
- kfree(cache);
-}
-
-static void cache_cpu_set(struct cache *cache, int cpu)
-{
- struct cache *next = cache;
-
- while (next) {
- WARN_ONCE(cpumask_test_cpu(cpu, &next->shared_cpu_map),
- "CPU %i already accounted in %s(%s)\n",
- cpu, next->ofnode->full_name,
- cache_type_string(next));
- cpumask_set_cpu(cpu, &next->shared_cpu_map);
- next = next->next_local;
- }
+ if (type == CACHE_TYPE_UNIFIED)
+ return 0;
+ return type;
}
-static int cache_size(const struct cache *cache, unsigned int *ret)
+static void cache_size(struct cacheinfo *this_leaf)
{
const char *propname;
const __be32 *cache_size;
+ int ct_idx;
- propname = cache_type_info[cache->type].size_prop;
+ ct_idx = get_cacheinfo_idx(this_leaf->type);
+ propname = cache_type_info[ct_idx].size_prop;
- cache_size = of_get_property(cache->ofnode, propname, NULL);
+ cache_size = of_get_property(this_leaf->of_node, propname, NULL);
if (!cache_size)
- return -ENODEV;
-
- *ret = of_read_number(cache_size, 1);
- return 0;
-}
-
-static int cache_size_kb(const struct cache *cache, unsigned int *ret)
-{
- unsigned int size;
-
- if (cache_size(cache, &size))
- return -ENODEV;
-
- *ret = size / 1024;
- return 0;
+ this_leaf->size = 0;
+ else
+ this_leaf->size = of_read_number(cache_size, 1);
}
/* not cache_line_size() because that's a macro in include/linux/cache.h */
-static int cache_get_line_size(const struct cache *cache, unsigned int *ret)
+static void cache_get_line_size(struct cacheinfo *this_leaf)
{
const __be32 *line_size;
- int i, lim;
+ int i, lim, ct_idx;
- lim = ARRAY_SIZE(cache_type_info[cache->type].line_size_props);
+ ct_idx = get_cacheinfo_idx(this_leaf->type);
+ lim = ARRAY_SIZE(cache_type_info[ct_idx].line_size_props);
for (i = 0; i < lim; i++) {
const char *propname;
- propname = cache_type_info[cache->type].line_size_props[i];
- line_size = of_get_property(cache->ofnode, propname, NULL);
+ propname = cache_type_info[ct_idx].line_size_props[i];
+ line_size = of_get_property(this_leaf->of_node, propname, NULL);
if (line_size)
break;
}
if (!line_size)
- return -ENODEV;
-
- *ret = of_read_number(line_size, 1);
- return 0;
+ this_leaf->coherency_line_size = 0;
+ else
+ this_leaf->coherency_line_size = of_read_number(line_size, 1);
}
-static int cache_nr_sets(const struct cache *cache, unsigned int *ret)
+static void cache_nr_sets(struct cacheinfo *this_leaf)
{
const char *propname;
const __be32 *nr_sets;
+ int ct_idx;
- propname = cache_type_info[cache->type].nr_sets_prop;
+ ct_idx = get_cacheinfo_idx(this_leaf->type);
+ propname = cache_type_info[ct_idx].nr_sets_prop;
- nr_sets = of_get_property(cache->ofnode, propname, NULL);
+ nr_sets = of_get_property(this_leaf->of_node, propname, NULL);
if (!nr_sets)
- return -ENODEV;
-
- *ret = of_read_number(nr_sets, 1);
- return 0;
+ this_leaf->number_of_sets = 0;
+ else
+ this_leaf->number_of_sets = of_read_number(nr_sets, 1);
}
-static int cache_associativity(const struct cache *cache, unsigned int *ret)
+static void cache_associativity(struct cacheinfo *this_leaf)
{
- unsigned int line_size;
- unsigned int nr_sets;
- unsigned int size;
-
- if (cache_nr_sets(cache, &nr_sets))
- goto err;
+ unsigned int line_size = this_leaf->coherency_line_size;
+ unsigned int nr_sets = this_leaf->number_of_sets;
+ unsigned int size = this_leaf->size;
/* If the cache is fully associative, there is no need to
* check the other properties.
*/
- if (nr_sets == 1) {
- *ret = 0;
- return 0;
- }
-
- if (cache_get_line_size(cache, &line_size))
- goto err;
- if (cache_size(cache, &size))
- goto err;
-
- if (!(nr_sets > 0 && size > 0 && line_size > 0))
- goto err;
-
- *ret = (size / nr_sets) / line_size;
- return 0;
-err:
- return -ENODEV;
-}
-
-/* helper for dealing with split caches */
-static struct cache *cache_find_first_sibling(struct cache *cache)
-{
- struct cache *iter;
-
- if (cache->type == CACHE_TYPE_UNIFIED)
- return cache;
-
- list_for_each_entry(iter, &cache_list, list)
- if (iter->ofnode == cache->ofnode && iter->next_local == cache)
- return iter;
-
- return cache;
-}
-
-/* return the first cache on a local list matching node */
-static struct cache *cache_lookup_by_node(const struct device_node *node)
-{
- struct cache *cache = NULL;
- struct cache *iter;
-
- list_for_each_entry(iter, &cache_list, list) {
- if (iter->ofnode != node)
- continue;
- cache = cache_find_first_sibling(iter);
- break;
- }
-
- return cache;
+ if ((nr_sets == 1) || !(nr_sets > 0 && size > 0 && line_size > 0))
+ this_leaf->ways_of_associativity = 0;
+ else
+ this_leaf->ways_of_associativity = (size / nr_sets) / line_size;
}
static bool cache_node_is_unified(const struct device_node *np)
@@ -324,526 +142,74 @@ static bool cache_node_is_unified(const struct device_node *np)
return of_get_property(np, "cache-unified", NULL);
}
-static struct cache *cache_do_one_devnode_unified(struct device_node *node,
- int level)
-{
- struct cache *cache;
-
- pr_debug("creating L%d ucache for %s\n", level, node->full_name);
-
- cache = new_cache(CACHE_TYPE_UNIFIED, level, node);
-
- return cache;
-}
-
-static struct cache *cache_do_one_devnode_split(struct device_node *node,
- int level)
-{
- struct cache *dcache, *icache;
-
- pr_debug("creating L%d dcache and icache for %s\n", level,
- node->full_name);
-
- dcache = new_cache(CACHE_TYPE_DATA, level, node);
- icache = new_cache(CACHE_TYPE_INSTRUCTION, level, node);
-
- if (!dcache || !icache)
- goto err;
-
- dcache->next_local = icache;
-
- return dcache;
-err:
- release_cache(dcache);
- release_cache(icache);
- return NULL;
-}
-
-static struct cache *cache_do_one_devnode(struct device_node *node, int level)
-{
- struct cache *cache;
-
- if (cache_node_is_unified(node))
- cache = cache_do_one_devnode_unified(node, level);
- else
- cache = cache_do_one_devnode_split(node, level);
-
- return cache;
-}
-
-static struct cache *cache_lookup_or_instantiate(struct device_node *node,
- int level)
-{
- struct cache *cache;
-
- cache = cache_lookup_by_node(node);
-
- WARN_ONCE(cache && cache->level != level,
- "cache level mismatch on lookup (got %d, expected %d)\n",
- cache->level, level);
-
- if (!cache)
- cache = cache_do_one_devnode(node, level);
-
- return cache;
-}
-
-static void link_cache_lists(struct cache *smaller, struct cache *bigger)
-{
- while (smaller->next_local) {
- if (smaller->next_local == bigger)
- return; /* already linked */
- smaller = smaller->next_local;
- }
-
- smaller->next_local = bigger;
-}
-
-static void do_subsidiary_caches_debugcheck(struct cache *cache)
-{
- WARN_ON_ONCE(cache->level != 1);
- WARN_ON_ONCE(strcmp(cache->ofnode->type, "cpu"));
-}
-
-static void do_subsidiary_caches(struct cache *cache)
-{
- struct device_node *subcache_node;
- int level = cache->level;
-
- do_subsidiary_caches_debugcheck(cache);
-
- while ((subcache_node = of_find_next_cache_node(cache->ofnode))) {
- struct cache *subcache;
-
- level++;
- subcache = cache_lookup_or_instantiate(subcache_node, level);
- of_node_put(subcache_node);
- if (!subcache)
- break;
-
- link_cache_lists(cache, subcache);
- cache = subcache;
- }
-}
-
-static struct cache *cache_chain_instantiate(unsigned int cpu_id)
+static void ci_leaf_init(struct cacheinfo *this_leaf,
+ enum cache_type type, unsigned int level)
{
- struct device_node *cpu_node;
- struct cache *cpu_cache = NULL;
-
- pr_debug("creating cache object(s) for CPU %i\n", cpu_id);
-
- cpu_node = of_get_cpu_node(cpu_id, NULL);
- WARN_ONCE(!cpu_node, "no OF node found for CPU %i\n", cpu_id);
- if (!cpu_node)
- goto out;
-
- cpu_cache = cache_lookup_or_instantiate(cpu_node, 1);
- if (!cpu_cache)
- goto out;
-
- do_subsidiary_caches(cpu_cache);
-
- cache_cpu_set(cpu_cache, cpu_id);
-out:
- of_node_put(cpu_node);
-
- return cpu_cache;
+ this_leaf->level = level;
+ this_leaf->type = type;
+ cache_size(this_leaf);
+ cache_get_line_size(this_leaf);
+ cache_nr_sets(this_leaf);
+ cache_associativity(this_leaf);
}
-static struct cache_dir *cacheinfo_create_cache_dir(unsigned int cpu_id)
+int init_cache_level(unsigned int cpu)
{
- struct cache_dir *cache_dir;
- struct device *dev;
- struct kobject *kobj = NULL;
-
- dev = get_cpu_device(cpu_id);
- WARN_ONCE(!dev, "no dev for CPU %i\n", cpu_id);
- if (!dev)
- goto err;
-
- kobj = kobject_create_and_add("cache", &dev->kobj);
- if (!kobj)
- goto err;
-
- cache_dir = kzalloc(sizeof(*cache_dir), GFP_KERNEL);
- if (!cache_dir)
- goto err;
-
- cache_dir->kobj = kobj;
-
- WARN_ON_ONCE(per_cpu(cache_dir_pcpu, cpu_id) != NULL);
-
- per_cpu(cache_dir_pcpu, cpu_id) = cache_dir;
+ struct device_node *np;
+ struct device *cpu_dev = get_cpu_device(cpu);
+ struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
+ unsigned int level = 0, leaves = 0;
- return cache_dir;
-err:
- kobject_put(kobj);
- return NULL;
-}
-
-static void cache_index_release(struct kobject *kobj)
-{
- struct cache_index_dir *index;
-
- index = kobj_to_cache_index_dir(kobj);
-
- pr_debug("freeing index directory for L%d %s cache\n",
- index->cache->level, cache_type_string(index->cache));
-
- kfree(index);
-}
-
-static ssize_t cache_index_show(struct kobject *k, struct attribute *attr, char *buf)
-{
- struct kobj_attribute *kobj_attr;
-
- kobj_attr = container_of(attr, struct kobj_attribute, attr);
-
- return kobj_attr->show(k, kobj_attr, buf);
-}
-
-static struct cache *index_kobj_to_cache(struct kobject *k)
-{
- struct cache_index_dir *index;
-
- index = kobj_to_cache_index_dir(k);
-
- return index->cache;
-}
-
-static ssize_t size_show(struct kobject *k, struct kobj_attribute *attr, char *buf)
-{
- unsigned int size_kb;
- struct cache *cache;
-
- cache = index_kobj_to_cache(k);
-
- if (cache_size_kb(cache, &size_kb))
- return -ENODEV;
-
- return sprintf(buf, "%uK\n", size_kb);
-}
-
-static struct kobj_attribute cache_size_attr =
- __ATTR(size, 0444, size_show, NULL);
-
-
-static ssize_t line_size_show(struct kobject *k, struct kobj_attribute *attr, char *buf)
-{
- unsigned int line_size;
- struct cache *cache;
-
- cache = index_kobj_to_cache(k);
-
- if (cache_get_line_size(cache, &line_size))
- return -ENODEV;
-
- return sprintf(buf, "%u\n", line_size);
-}
-
-static struct kobj_attribute cache_line_size_attr =
- __ATTR(coherency_line_size, 0444, line_size_show, NULL);
-
-static ssize_t nr_sets_show(struct kobject *k, struct kobj_attribute *attr, char *buf)
-{
- unsigned int nr_sets;
- struct cache *cache;
-
- cache = index_kobj_to_cache(k);
-
- if (cache_nr_sets(cache, &nr_sets))
+ if (!cpu_dev) {
+ pr_err("No cpu device for CPU %d\n", cpu);
return -ENODEV;
-
- return sprintf(buf, "%u\n", nr_sets);
-}
-
-static struct kobj_attribute cache_nr_sets_attr =
- __ATTR(number_of_sets, 0444, nr_sets_show, NULL);
-
-static ssize_t associativity_show(struct kobject *k, struct kobj_attribute *attr, char *buf)
-{
- unsigned int associativity;
- struct cache *cache;
-
- cache = index_kobj_to_cache(k);
-
- if (cache_associativity(cache, &associativity))
- return -ENODEV;
-
- return sprintf(buf, "%u\n", associativity);
-}
-
-static struct kobj_attribute cache_assoc_attr =
- __ATTR(ways_of_associativity, 0444, associativity_show, NULL);
-
-static ssize_t type_show(struct kobject *k, struct kobj_attribute *attr, char *buf)
-{
- struct cache *cache;
-
- cache = index_kobj_to_cache(k);
-
- return sprintf(buf, "%s\n", cache_type_string(cache));
-}
-
-static struct kobj_attribute cache_type_attr =
- __ATTR(type, 0444, type_show, NULL);
-
-static ssize_t level_show(struct kobject *k, struct kobj_attribute *attr, char *buf)
-{
- struct cache_index_dir *index;
- struct cache *cache;
-
- index = kobj_to_cache_index_dir(k);
- cache = index->cache;
-
- return sprintf(buf, "%d\n", cache->level);
-}
-
-static struct kobj_attribute cache_level_attr =
- __ATTR(level, 0444, level_show, NULL);
-
-static ssize_t shared_cpu_map_show(struct kobject *k, struct kobj_attribute *attr, char *buf)
-{
- struct cache_index_dir *index;
- struct cache *cache;
- int len;
- int n = 0;
-
- index = kobj_to_cache_index_dir(k);
- cache = index->cache;
- len = PAGE_SIZE - 2;
-
- if (len > 1) {
- n = cpumask_scnprintf(buf, len, &cache->shared_cpu_map);
- buf[n++] = '\n';
- buf[n] = '\0';
}
- return n;
-}
-
-static struct kobj_attribute cache_shared_cpu_map_attr =
- __ATTR(shared_cpu_map, 0444, shared_cpu_map_show, NULL);
-
-/* Attributes which should always be created -- the kobject/sysfs core
- * does this automatically via kobj_type->default_attrs. This is the
- * minimum data required to uniquely identify a cache.
- */
-static struct attribute *cache_index_default_attrs[] = {
- &cache_type_attr.attr,
- &cache_level_attr.attr,
- &cache_shared_cpu_map_attr.attr,
- NULL,
-};
-
-/* Attributes which should be created if the cache device node has the
- * right properties -- see cacheinfo_create_index_opt_attrs
- */
-static struct kobj_attribute *cache_index_opt_attrs[] = {
- &cache_size_attr,
- &cache_line_size_attr,
- &cache_nr_sets_attr,
- &cache_assoc_attr,
-};
-
-static const struct sysfs_ops cache_index_ops = {
- .show = cache_index_show,
-};
-
-static struct kobj_type cache_index_type = {
- .release = cache_index_release,
- .sysfs_ops = &cache_index_ops,
- .default_attrs = cache_index_default_attrs,
-};
-
-static void cacheinfo_create_index_opt_attrs(struct cache_index_dir *dir)
-{
- const char *cache_name;
- const char *cache_type;
- struct cache *cache;
- char *buf;
- int i;
-
- buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
- if (!buf)
- return;
-
- cache = dir->cache;
- cache_name = cache->ofnode->full_name;
- cache_type = cache_type_string(cache);
-
- /* We don't want to create an attribute that can't provide a
- * meaningful value. Check the return value of each optional
- * attribute's ->show method before registering the
- * attribute.
- */
- for (i = 0; i < ARRAY_SIZE(cache_index_opt_attrs); i++) {
- struct kobj_attribute *attr;
- ssize_t rc;
-
- attr = cache_index_opt_attrs[i];
-
- rc = attr->show(&dir->kobj, attr, buf);
- if (rc <= 0) {
- pr_debug("not creating %s attribute for "
- "%s(%s) (rc = %zd)\n",
- attr->attr.name, cache_name,
- cache_type, rc);
- continue;
- }
- if (sysfs_create_file(&dir->kobj, &attr->attr))
- pr_debug("could not create %s attribute for %s(%s)\n",
- attr->attr.name, cache_name, cache_type);
+ np = cpu_dev->of_node;
+ if (!np) {
+ pr_err("Failed to find cpu%d device node\n", cpu);
+ return -ENOENT;
}
- kfree(buf);
-}
-
-static void cacheinfo_create_index_dir(struct cache *cache, int index,
- struct cache_dir *cache_dir)
-{
- struct cache_index_dir *index_dir;
- int rc;
-
- index_dir = kzalloc(sizeof(*index_dir), GFP_KERNEL);
- if (!index_dir)
- goto err;
-
- index_dir->cache = cache;
-
- rc = kobject_init_and_add(&index_dir->kobj, &cache_index_type,
- cache_dir->kobj, "index%d", index);
- if (rc)
- goto err;
-
- index_dir->next = cache_dir->index;
- cache_dir->index = index_dir;
-
- cacheinfo_create_index_opt_attrs(index_dir);
-
- return;
-err:
- kfree(index_dir);
-}
-
-static void cacheinfo_sysfs_populate(unsigned int cpu_id,
- struct cache *cache_list)
-{
- struct cache_dir *cache_dir;
- struct cache *cache;
- int index = 0;
-
- cache_dir = cacheinfo_create_cache_dir(cpu_id);
- if (!cache_dir)
- return;
-
- cache = cache_list;
- while (cache) {
- cacheinfo_create_index_dir(cache, index, cache_dir);
- index++;
- cache = cache->next_local;
+ while (np) {
+ leaves += cache_node_is_unified(np) ? 1 : 2;
+ level++;
+ of_node_put(np);
+ np = of_find_next_cache_node(np);
}
-}
+ this_cpu_ci->num_levels = level;
+ this_cpu_ci->num_leaves = leaves;
-void cacheinfo_cpu_online(unsigned int cpu_id)
-{
- struct cache *cache;
-
- cache = cache_chain_instantiate(cpu_id);
- if (!cache)
- return;
-
- cacheinfo_sysfs_populate(cpu_id, cache);
-}
-
-/* functions needed to remove cache entry for cpu offline or suspend/resume */
-
-#if (defined(CONFIG_PPC_PSERIES) && defined(CONFIG_SUSPEND)) || \
- defined(CONFIG_HOTPLUG_CPU)
-
-static struct cache *cache_lookup_by_cpu(unsigned int cpu_id)
-{
- struct device_node *cpu_node;
- struct cache *cache;
-
- cpu_node = of_get_cpu_node(cpu_id, NULL);
- WARN_ONCE(!cpu_node, "no OF node found for CPU %i\n", cpu_id);
- if (!cpu_node)
- return NULL;
-
- cache = cache_lookup_by_node(cpu_node);
- of_node_put(cpu_node);
-
- return cache;
+ return 0;
}
-static void remove_index_dirs(struct cache_dir *cache_dir)
+int populate_cache_leaves(unsigned int cpu)
{
- struct cache_index_dir *index;
-
- index = cache_dir->index;
+ struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
+ struct cacheinfo *this_leaf = this_cpu_ci->info_list;
+ struct device *cpu_dev = get_cpu_device(cpu);
+ struct device_node *np;
+ unsigned int level, idx;
- while (index) {
- struct cache_index_dir *next;
-
- next = index->next;
- kobject_put(&index->kobj);
- index = next;
+ np = of_node_get(cpu_dev->of_node);
+ if (!np) {
+ pr_err("Failed to find cpu%d device node\n", cpu);
+ return -ENOENT;
}
-}
-
-static void remove_cache_dir(struct cache_dir *cache_dir)
-{
- remove_index_dirs(cache_dir);
- /* Remove cache dir from sysfs */
- kobject_del(cache_dir->kobj);
-
- kobject_put(cache_dir->kobj);
-
- kfree(cache_dir);
-}
-
-static void cache_cpu_clear(struct cache *cache, int cpu)
-{
- while (cache) {
- struct cache *next = cache->next_local;
-
- WARN_ONCE(!cpumask_test_cpu(cpu, &cache->shared_cpu_map),
- "CPU %i not accounted in %s(%s)\n",
- cpu, cache->ofnode->full_name,
- cache_type_string(cache));
-
- cpumask_clear_cpu(cpu, &cache->shared_cpu_map);
-
- /* Release the cache object if all the cpus using it
- * are offline */
- if (cpumask_empty(&cache->shared_cpu_map))
- release_cache(cache);
-
- cache = next;
+ for (idx = 0, level = 1; level <= this_cpu_ci->num_levels &&
+ idx < this_cpu_ci->num_leaves; idx++, level++) {
+ if (!this_leaf)
+ return -EINVAL;
+
+ this_leaf->of_node = np;
+ if (cache_node_is_unified(np)) {
+ ci_leaf_init(this_leaf++, CACHE_TYPE_UNIFIED, level);
+ } else {
+ ci_leaf_init(this_leaf++, CACHE_TYPE_DATA, level);
+ ci_leaf_init(this_leaf++, CACHE_TYPE_INST, level);
+ }
+ np = of_find_next_cache_node(np);
}
+ return 0;
}
-void cacheinfo_cpu_offline(unsigned int cpu_id)
-{
- struct cache_dir *cache_dir;
- struct cache *cache;
-
- /* Prevent userspace from seeing inconsistent state - remove
- * the sysfs hierarchy first */
- cache_dir = per_cpu(cache_dir_pcpu, cpu_id);
-
- /* careful, sysfs population may have failed */
- if (cache_dir)
- remove_cache_dir(cache_dir);
-
- per_cpu(cache_dir_pcpu, cpu_id) = NULL;
-
- /* clear the CPU's bit in its cache chain, possibly freeing
- * cache objects */
- cache = cache_lookup_by_cpu(cpu_id);
- if (cache)
- cache_cpu_clear(cache, cpu_id);
-}
-#endif /* (CONFIG_PPC_PSERIES && CONFIG_SUSPEND) || CONFIG_HOTPLUG_CPU */
diff --git a/arch/powerpc/kernel/cacheinfo.h b/arch/powerpc/kernel/cacheinfo.h
deleted file mode 100644
index a7b74d36acd7..000000000000
--- a/arch/powerpc/kernel/cacheinfo.h
+++ /dev/null
@@ -1,8 +0,0 @@
-#ifndef _PPC_CACHEINFO_H
-#define _PPC_CACHEINFO_H
-
-/* These are just hooks for sysfs.c to use. */
-extern void cacheinfo_cpu_online(unsigned int cpu_id);
-extern void cacheinfo_cpu_offline(unsigned int cpu_id);
-
-#endif /* _PPC_CACHEINFO_H */
diff --git a/arch/powerpc/kernel/sysfs.c b/arch/powerpc/kernel/sysfs.c
index 67fd2fd2620a..6e9c5a8141bb 100644
--- a/arch/powerpc/kernel/sysfs.c
+++ b/arch/powerpc/kernel/sysfs.c
@@ -19,8 +19,6 @@
#include <asm/pmc.h>
#include <asm/firmware.h>
-#include "cacheinfo.h"
-
#ifdef CONFIG_PPC64
#include <asm/paca.h>
#include <asm/lppaca.h>
@@ -743,7 +741,6 @@ static void register_cpu_online(unsigned int cpu)
device_create_file(s, &dev_attr_altivec_idle_wait_time);
}
#endif
- cacheinfo_cpu_online(cpu);
}
#ifdef CONFIG_HOTPLUG_CPU
@@ -824,7 +821,6 @@ static void unregister_cpu_online(unsigned int cpu)
device_remove_file(s, &dev_attr_altivec_idle_wait_time);
}
#endif
- cacheinfo_cpu_offline(cpu);
}
#ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
@@ -988,8 +984,7 @@ static int __init topology_init(void)
int cpu;
register_nodes();
-
- cpu_notifier_register_begin();
+ register_cpu_notifier(&sysfs_cpu_nb);
for_each_possible_cpu(cpu) {
struct cpu *c = &per_cpu(cpu_devices, cpu);
@@ -1013,11 +1008,6 @@ static int __init topology_init(void)
if (cpu_online(cpu))
register_cpu_online(cpu);
}
-
- __register_cpu_notifier(&sysfs_cpu_nb);
-
- cpu_notifier_register_done();
-
#ifdef CONFIG_PPC64
sysfs_create_dscr_default();
#endif /* CONFIG_PPC64 */
--
1.8.3.2
--
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