#include <linux/nodemask.h>
#include <linux/cpu.h>
#include <linux/device.h>
+#include <linux/pm_runtime.h>
#include <linux/swap.h>
#include <linux/slab.h>
static DEVICE_ATTR(cpumap, S_IRUGO, node_read_cpumask, NULL);
static DEVICE_ATTR(cpulist, S_IRUGO, node_read_cpulist, NULL);
+/**
+ * struct node_access_nodes - Access class device to hold user visible
+ * relationships to other nodes.
+ * @dev: Device for this memory access class
+ * @list_node: List element in the node's access list
+ * @access: The access class rank
+ */
+struct node_access_nodes {
+ struct device dev;
+ struct list_head list_node;
+ unsigned access;
+#ifdef CONFIG_HMEM_REPORTING
+ struct node_hmem_attrs hmem_attrs;
+#endif
+};
+#define to_access_nodes(dev) container_of(dev, struct node_access_nodes, dev)
+
+static struct attribute *node_init_access_node_attrs[] = {
+ NULL,
+};
+
+static struct attribute *node_targ_access_node_attrs[] = {
+ NULL,
+};
+
+static const struct attribute_group initiators = {
+ .name = "initiators",
+ .attrs = node_init_access_node_attrs,
+};
+
+static const struct attribute_group targets = {
+ .name = "targets",
+ .attrs = node_targ_access_node_attrs,
+};
+
+static const struct attribute_group *node_access_node_groups[] = {
+ &initiators,
+ &targets,
+ NULL,
+};
+
+static void node_remove_accesses(struct node *node)
+{
+ struct node_access_nodes *c, *cnext;
+
+ list_for_each_entry_safe(c, cnext, &node->access_list, list_node) {
+ list_del(&c->list_node);
+ device_unregister(&c->dev);
+ }
+}
+
+static void node_access_release(struct device *dev)
+{
+ kfree(to_access_nodes(dev));
+}
+
+static struct node_access_nodes *node_init_node_access(struct node *node,
+ unsigned access)
+{
+ struct node_access_nodes *access_node;
+ struct device *dev;
+
+ list_for_each_entry(access_node, &node->access_list, list_node)
+ if (access_node->access == access)
+ return access_node;
+
+ access_node = kzalloc(sizeof(*access_node), GFP_KERNEL);
+ if (!access_node)
+ return NULL;
+
+ access_node->access = access;
+ dev = &access_node->dev;
+ dev->parent = &node->dev;
+ dev->release = node_access_release;
+ dev->groups = node_access_node_groups;
+ if (dev_set_name(dev, "access%u", access))
+ goto free;
+
+ if (device_register(dev))
+ goto free_name;
+
+ pm_runtime_no_callbacks(dev);
+ list_add_tail(&access_node->list_node, &node->access_list);
+ return access_node;
+free_name:
+ kfree_const(dev->kobj.name);
+free:
+ kfree(access_node);
+ return NULL;
+}
+
+#ifdef CONFIG_HMEM_REPORTING
+#define ACCESS_ATTR(name) \
+static ssize_t name##_show(struct device *dev, \
+ struct device_attribute *attr, \
+ char *buf) \
+{ \
+ return sprintf(buf, "%u\n", to_access_nodes(dev)->hmem_attrs.name); \
+} \
+static DEVICE_ATTR_RO(name);
+
+ACCESS_ATTR(read_bandwidth)
+ACCESS_ATTR(read_latency)
+ACCESS_ATTR(write_bandwidth)
+ACCESS_ATTR(write_latency)
+
+static struct attribute *access_attrs[] = {
+ &dev_attr_read_bandwidth.attr,
+ &dev_attr_read_latency.attr,
+ &dev_attr_write_bandwidth.attr,
+ &dev_attr_write_latency.attr,
+ NULL,
+};
+
+/**
+ * node_set_perf_attrs - Set the performance values for given access class
+ * @nid: Node identifier to be set
+ * @hmem_attrs: Heterogeneous memory performance attributes
+ * @access: The access class the for the given attributes
+ */
+void node_set_perf_attrs(unsigned int nid, struct node_hmem_attrs *hmem_attrs,
+ unsigned access)
+{
+ struct node_access_nodes *c;
+ struct node *node;
+ int i;
+
+ if (WARN_ON_ONCE(!node_online(nid)))
+ return;
+
+ node = node_devices[nid];
+ c = node_init_node_access(node, access);
+ if (!c)
+ return;
+
+ c->hmem_attrs = *hmem_attrs;
+ for (i = 0; access_attrs[i] != NULL; i++) {
+ if (sysfs_add_file_to_group(&c->dev.kobj, access_attrs[i],
+ "initiators")) {
+ pr_info("failed to add performance attribute to node %d\n",
+ nid);
+ break;
+ }
+ }
+}
+
+/**
+ * struct node_cache_info - Internal tracking for memory node caches
+ * @dev: Device represeting the cache level
+ * @node: List element for tracking in the node
+ * @cache_attrs:Attributes for this cache level
+ */
+struct node_cache_info {
+ struct device dev;
+ struct list_head node;
+ struct node_cache_attrs cache_attrs;
+};
+#define to_cache_info(device) container_of(device, struct node_cache_info, dev)
+
+#define CACHE_ATTR(name, fmt) \
+static ssize_t name##_show(struct device *dev, \
+ struct device_attribute *attr, \
+ char *buf) \
+{ \
+ return sprintf(buf, fmt "\n", to_cache_info(dev)->cache_attrs.name);\
+} \
+DEVICE_ATTR_RO(name);
+
+CACHE_ATTR(size, "%llu")
+CACHE_ATTR(line_size, "%u")
+CACHE_ATTR(indexing, "%u")
+CACHE_ATTR(write_policy, "%u")
+
+static struct attribute *cache_attrs[] = {
+ &dev_attr_indexing.attr,
+ &dev_attr_size.attr,
+ &dev_attr_line_size.attr,
+ &dev_attr_write_policy.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(cache);
+
+static void node_cache_release(struct device *dev)
+{
+ kfree(dev);
+}
+
+static void node_cacheinfo_release(struct device *dev)
+{
+ struct node_cache_info *info = to_cache_info(dev);
+ kfree(info);
+}
+
+static void node_init_cache_dev(struct node *node)
+{
+ struct device *dev;
+
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ if (!dev)
+ return;
+
+ dev->parent = &node->dev;
+ dev->release = node_cache_release;
+ if (dev_set_name(dev, "memory_side_cache"))
+ goto free_dev;
+
+ if (device_register(dev))
+ goto free_name;
+
+ pm_runtime_no_callbacks(dev);
+ node->cache_dev = dev;
+ return;
+free_name:
+ kfree_const(dev->kobj.name);
+free_dev:
+ kfree(dev);
+}
+
+/**
+ * node_add_cache() - add cache attribute to a memory node
+ * @nid: Node identifier that has new cache attributes
+ * @cache_attrs: Attributes for the cache being added
+ */
+void node_add_cache(unsigned int nid, struct node_cache_attrs *cache_attrs)
+{
+ struct node_cache_info *info;
+ struct device *dev;
+ struct node *node;
+
+ if (!node_online(nid) || !node_devices[nid])
+ return;
+
+ node = node_devices[nid];
+ list_for_each_entry(info, &node->cache_attrs, node) {
+ if (info->cache_attrs.level == cache_attrs->level) {
+ dev_warn(&node->dev,
+ "attempt to add duplicate cache level:%d\n",
+ cache_attrs->level);
+ return;
+ }
+ }
+
+ if (!node->cache_dev)
+ node_init_cache_dev(node);
+ if (!node->cache_dev)
+ return;
+
+ info = kzalloc(sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return;
+
+ dev = &info->dev;
+ dev->parent = node->cache_dev;
+ dev->release = node_cacheinfo_release;
+ dev->groups = cache_groups;
+ if (dev_set_name(dev, "index%d", cache_attrs->level))
+ goto free_cache;
+
+ info->cache_attrs = *cache_attrs;
+ if (device_register(dev)) {
+ dev_warn(&node->dev, "failed to add cache level:%d\n",
+ cache_attrs->level);
+ goto free_name;
+ }
+ pm_runtime_no_callbacks(dev);
+ list_add_tail(&info->node, &node->cache_attrs);
+ return;
+free_name:
+ kfree_const(dev->kobj.name);
+free_cache:
+ kfree(info);
+}
+
+static void node_remove_caches(struct node *node)
+{
+ struct node_cache_info *info, *next;
+
+ if (!node->cache_dev)
+ return;
+
+ list_for_each_entry_safe(info, next, &node->cache_attrs, node) {
+ list_del(&info->node);
+ device_unregister(&info->dev);
+ }
+ device_unregister(node->cache_dev);
+}
+
+static void node_init_caches(unsigned int nid)
+{
+ INIT_LIST_HEAD(&node_devices[nid]->cache_attrs);
+}
+#else
+static void node_init_caches(unsigned int nid) { }
+static void node_remove_caches(struct node *node) { }
+#endif
+
#define K(x) ((x) << (PAGE_SHIFT - 10))
static ssize_t node_read_meminfo(struct device *dev,
struct device_attribute *attr, char *buf)
void unregister_node(struct node *node)
{
hugetlb_unregister_node(node); /* no-op, if memoryless node */
-
+ node_remove_accesses(node);
+ node_remove_caches(node);
device_unregister(&node->dev);
}
kobject_name(&node_devices[nid]->dev.kobj));
}
+/**
+ * register_memory_node_under_compute_node - link memory node to its compute
+ * node for a given access class.
+ * @mem_node: Memory node number
+ * @cpu_node: Cpu node number
+ * @access: Access class to register
+ *
+ * Description:
+ * For use with platforms that may have separate memory and compute nodes.
+ * This function will export node relationships linking which memory
+ * initiator nodes can access memory targets at a given ranked access
+ * class.
+ */
+int register_memory_node_under_compute_node(unsigned int mem_nid,
+ unsigned int cpu_nid,
+ unsigned access)
+{
+ struct node *init_node, *targ_node;
+ struct node_access_nodes *initiator, *target;
+ int ret;
+
+ if (!node_online(cpu_nid) || !node_online(mem_nid))
+ return -ENODEV;
+
+ init_node = node_devices[cpu_nid];
+ targ_node = node_devices[mem_nid];
+ initiator = node_init_node_access(init_node, access);
+ target = node_init_node_access(targ_node, access);
+ if (!initiator || !target)
+ return -ENOMEM;
+
+ ret = sysfs_add_link_to_group(&initiator->dev.kobj, "targets",
+ &targ_node->dev.kobj,
+ dev_name(&targ_node->dev));
+ if (ret)
+ return ret;
+
+ ret = sysfs_add_link_to_group(&target->dev.kobj, "initiators",
+ &init_node->dev.kobj,
+ dev_name(&init_node->dev));
+ if (ret)
+ goto err;
+
+ return 0;
+ err:
+ sysfs_remove_link_from_group(&initiator->dev.kobj, "targets",
+ dev_name(&targ_node->dev));
+ return ret;
+}
+
int unregister_cpu_under_node(unsigned int cpu, unsigned int nid)
{
struct device *obj;
register_cpu_under_node(cpu, nid);
}
+ INIT_LIST_HEAD(&node_devices[nid]->access_list);
/* initialize work queue for memory hot plug */
init_node_hugetlb_work(nid);
+ node_init_caches(nid);
return error;
}
projects / linux-2.6-microblaze.git / blobdiff