static void irq_domain_check_hierarchy(struct irq_domain *domain);
struct irqchip_fwid {
- struct fwnode_handle fwnode;
- char *name;
+ struct fwnode_handle fwnode;
+ unsigned int type;
+ char *name;
void *data;
};
+#ifdef CONFIG_GENERIC_IRQ_DEBUGFS
+static void debugfs_add_domain_dir(struct irq_domain *d);
+static void debugfs_remove_domain_dir(struct irq_domain *d);
+#else
+static inline void debugfs_add_domain_dir(struct irq_domain *d) { }
+static inline void debugfs_remove_domain_dir(struct irq_domain *d) { }
+#endif
+
/**
* irq_domain_alloc_fwnode - Allocate a fwnode_handle suitable for
* identifying an irq domain
- * @data: optional user-provided data
+ * @type: Type of irqchip_fwnode. See linux/irqdomain.h
+ * @name: Optional user provided domain name
+ * @id: Optional user provided id if name != NULL
+ * @data: Optional user-provided data
*
- * Allocate a struct device_node, and return a poiner to the embedded
+ * Allocate a struct irqchip_fwid, and return a poiner to the embedded
* fwnode_handle (or NULL on failure).
+ *
+ * Note: The types IRQCHIP_FWNODE_NAMED and IRQCHIP_FWNODE_NAMED_ID are
+ * solely to transport name information to irqdomain creation code. The
+ * node is not stored. For other types the pointer is kept in the irq
+ * domain struct.
*/
-struct fwnode_handle *irq_domain_alloc_fwnode(void *data)
+struct fwnode_handle *__irq_domain_alloc_fwnode(unsigned int type, int id,
+ const char *name, void *data)
{
struct irqchip_fwid *fwid;
- char *name;
+ char *n;
fwid = kzalloc(sizeof(*fwid), GFP_KERNEL);
- name = kasprintf(GFP_KERNEL, "irqchip@%p", data);
- if (!fwid || !name) {
+ switch (type) {
+ case IRQCHIP_FWNODE_NAMED:
+ n = kasprintf(GFP_KERNEL, "%s", name);
+ break;
+ case IRQCHIP_FWNODE_NAMED_ID:
+ n = kasprintf(GFP_KERNEL, "%s-%d", name, id);
+ break;
+ default:
+ n = kasprintf(GFP_KERNEL, "irqchip@%p", data);
+ break;
+ }
+
+ if (!fwid || !n) {
kfree(fwid);
- kfree(name);
+ kfree(n);
return NULL;
}
- fwid->name = name;
+ fwid->type = type;
+ fwid->name = n;
fwid->data = data;
fwid->fwnode.type = FWNODE_IRQCHIP;
return &fwid->fwnode;
}
-EXPORT_SYMBOL_GPL(irq_domain_alloc_fwnode);
+EXPORT_SYMBOL_GPL(__irq_domain_alloc_fwnode);
/**
* irq_domain_free_fwnode - Free a non-OF-backed fwnode_handle
void *host_data)
{
struct device_node *of_node = to_of_node(fwnode);
+ struct irqchip_fwid *fwid;
struct irq_domain *domain;
+ static atomic_t unknown_domains;
+
domain = kzalloc_node(sizeof(*domain) + (sizeof(unsigned int) * size),
GFP_KERNEL, of_node_to_nid(of_node));
if (WARN_ON(!domain))
return NULL;
+ if (fwnode && is_fwnode_irqchip(fwnode)) {
+ fwid = container_of(fwnode, struct irqchip_fwid, fwnode);
+
+ switch (fwid->type) {
+ case IRQCHIP_FWNODE_NAMED:
+ case IRQCHIP_FWNODE_NAMED_ID:
+ domain->name = kstrdup(fwid->name, GFP_KERNEL);
+ if (!domain->name) {
+ kfree(domain);
+ return NULL;
+ }
+ domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
+ break;
+ default:
+ domain->fwnode = fwnode;
+ domain->name = fwid->name;
+ break;
+ }
+ } else if (of_node) {
+ char *name;
+
+ /*
+ * DT paths contain '/', which debugfs is legitimately
+ * unhappy about. Replace them with ':', which does
+ * the trick and is not as offensive as '\'...
+ */
+ name = kstrdup(of_node_full_name(of_node), GFP_KERNEL);
+ if (!name) {
+ kfree(domain);
+ return NULL;
+ }
+
+ strreplace(name, '/', ':');
+
+ domain->name = name;
+ domain->fwnode = fwnode;
+ domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
+ }
+
+ if (!domain->name) {
+ if (fwnode) {
+ pr_err("Invalid fwnode type (%d) for irqdomain\n",
+ fwnode->type);
+ }
+ domain->name = kasprintf(GFP_KERNEL, "unknown-%d",
+ atomic_inc_return(&unknown_domains));
+ if (!domain->name) {
+ kfree(domain);
+ return NULL;
+ }
+ domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
+ }
+
of_node_get(of_node);
/* Fill structure */
INIT_RADIX_TREE(&domain->revmap_tree, GFP_KERNEL);
domain->ops = ops;
domain->host_data = host_data;
- domain->fwnode = fwnode;
domain->hwirq_max = hwirq_max;
domain->revmap_size = size;
domain->revmap_direct_max_irq = direct_max;
irq_domain_check_hierarchy(domain);
mutex_lock(&irq_domain_mutex);
+ debugfs_add_domain_dir(domain);
list_add(&domain->link, &irq_domain_list);
mutex_unlock(&irq_domain_mutex);
void irq_domain_remove(struct irq_domain *domain)
{
mutex_lock(&irq_domain_mutex);
+ debugfs_remove_domain_dir(domain);
WARN_ON(!radix_tree_empty(&domain->revmap_tree));
pr_debug("Removed domain %s\n", domain->name);
of_node_put(irq_domain_get_of_node(domain));
+ if (domain->flags & IRQ_DOMAIN_NAME_ALLOCATED)
+ kfree(domain->name);
kfree(domain);
}
EXPORT_SYMBOL_GPL(irq_domain_remove);
+void irq_domain_update_bus_token(struct irq_domain *domain,
+ enum irq_domain_bus_token bus_token)
+{
+ char *name;
+
+ if (domain->bus_token == bus_token)
+ return;
+
+ mutex_lock(&irq_domain_mutex);
+
+ domain->bus_token = bus_token;
+
+ name = kasprintf(GFP_KERNEL, "%s-%d", domain->name, bus_token);
+ if (!name) {
+ mutex_unlock(&irq_domain_mutex);
+ return;
+ }
+
+ debugfs_remove_domain_dir(domain);
+
+ if (domain->flags & IRQ_DOMAIN_NAME_ALLOCATED)
+ kfree(domain->name);
+ else
+ domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
+
+ domain->name = name;
+ debugfs_add_domain_dir(domain);
+
+ mutex_unlock(&irq_domain_mutex);
+}
+
/**
* irq_domain_add_simple() - Register an irq_domain and optionally map a range of irqs
* @of_node: pointer to interrupt controller's device tree node.
irq_data->domain = NULL;
irq_data->hwirq = 0;
+ domain->mapcount--;
/* Clear reverse map for this hwirq */
if (hwirq < domain->revmap_size) {
domain->name = irq_data->chip->name;
}
+ domain->mapcount++;
if (hwirq < domain->revmap_size) {
domain->linear_revmap[hwirq] = virq;
} else {
EXPORT_SYMBOL_GPL(irq_find_mapping);
#ifdef CONFIG_IRQ_DOMAIN_DEBUG
+static void virq_debug_show_one(struct seq_file *m, struct irq_desc *desc)
+{
+ struct irq_domain *domain;
+ struct irq_data *data;
+
+ domain = desc->irq_data.domain;
+ data = &desc->irq_data;
+
+ while (domain) {
+ unsigned int irq = data->irq;
+ unsigned long hwirq = data->hwirq;
+ struct irq_chip *chip;
+ bool direct;
+
+ if (data == &desc->irq_data)
+ seq_printf(m, "%5d ", irq);
+ else
+ seq_printf(m, "%5d+ ", irq);
+ seq_printf(m, "0x%05lx ", hwirq);
+
+ chip = irq_data_get_irq_chip(data);
+ seq_printf(m, "%-15s ", (chip && chip->name) ? chip->name : "none");
+
+ seq_printf(m, data ? "0x%p " : " %p ",
+ irq_data_get_irq_chip_data(data));
+
+ seq_printf(m, " %c ", (desc->action && desc->action->handler) ? '*' : ' ');
+ direct = (irq == hwirq) && (irq < domain->revmap_direct_max_irq);
+ seq_printf(m, "%6s%-8s ",
+ (hwirq < domain->revmap_size) ? "LINEAR" : "RADIX",
+ direct ? "(DIRECT)" : "");
+ seq_printf(m, "%s\n", domain->name);
+#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
+ domain = domain->parent;
+ data = data->parent_data;
+#else
+ domain = NULL;
+#endif
+ }
+}
+
static int virq_debug_show(struct seq_file *m, void *private)
{
unsigned long flags;
struct irq_desc *desc;
struct irq_domain *domain;
struct radix_tree_iter iter;
- void *data, **slot;
+ void **slot;
int i;
seq_printf(m, " %-16s %-6s %-10s %-10s %s\n",
mutex_lock(&irq_domain_mutex);
list_for_each_entry(domain, &irq_domain_list, link) {
struct device_node *of_node;
+ const char *name;
+
int count = 0;
+
of_node = irq_domain_get_of_node(domain);
+ if (of_node)
+ name = of_node_full_name(of_node);
+ else if (is_fwnode_irqchip(domain->fwnode))
+ name = container_of(domain->fwnode, struct irqchip_fwid,
+ fwnode)->name;
+ else
+ name = "";
+
radix_tree_for_each_slot(slot, &domain->revmap_tree, &iter, 0)
count++;
seq_printf(m, "%c%-16s %6u %10u %10u %s\n",
domain == irq_default_domain ? '*' : ' ', domain->name,
domain->revmap_size + count, domain->revmap_size,
domain->revmap_direct_max_irq,
- of_node ? of_node_full_name(of_node) : "");
+ name);
}
mutex_unlock(&irq_domain_mutex);
continue;
raw_spin_lock_irqsave(&desc->lock, flags);
- domain = desc->irq_data.domain;
-
- if (domain) {
- struct irq_chip *chip;
- int hwirq = desc->irq_data.hwirq;
- bool direct;
-
- seq_printf(m, "%5d ", i);
- seq_printf(m, "0x%05x ", hwirq);
-
- chip = irq_desc_get_chip(desc);
- seq_printf(m, "%-15s ", (chip && chip->name) ? chip->name : "none");
-
- data = irq_desc_get_chip_data(desc);
- seq_printf(m, data ? "0x%p " : " %p ", data);
-
- seq_printf(m, " %c ", (desc->action && desc->action->handler) ? '*' : ' ');
- direct = (i == hwirq) && (i < domain->revmap_direct_max_irq);
- seq_printf(m, "%6s%-8s ",
- (hwirq < domain->revmap_size) ? "LINEAR" : "RADIX",
- direct ? "(DIRECT)" : "");
- seq_printf(m, "%s\n", desc->irq_data.domain->name);
- }
-
+ virq_debug_show_one(m, desc);
raw_spin_unlock_irqrestore(&desc->lock, flags);
}
struct irq_domain *domain = data->domain;
irq_hw_number_t hwirq = data->hwirq;
+ domain->mapcount++;
if (hwirq < domain->revmap_size) {
domain->linear_revmap[hwirq] = virq;
} else {
struct irq_domain *domain = data->domain;
irq_hw_number_t hwirq = data->hwirq;
+ domain->mapcount--;
if (hwirq < domain->revmap_size) {
domain->linear_revmap[hwirq] = 0;
} else {
irq_domain_free_irqs_common(domain, virq, nr_irqs);
}
-static bool irq_domain_is_auto_recursive(struct irq_domain *domain)
-{
- return domain->flags & IRQ_DOMAIN_FLAG_AUTO_RECURSIVE;
-}
-
-static void irq_domain_free_irqs_recursive(struct irq_domain *domain,
+static void irq_domain_free_irqs_hierarchy(struct irq_domain *domain,
unsigned int irq_base,
unsigned int nr_irqs)
{
domain->ops->free(domain, irq_base, nr_irqs);
- if (irq_domain_is_auto_recursive(domain)) {
- BUG_ON(!domain->parent);
- irq_domain_free_irqs_recursive(domain->parent, irq_base,
- nr_irqs);
- }
}
-int irq_domain_alloc_irqs_recursive(struct irq_domain *domain,
+int irq_domain_alloc_irqs_hierarchy(struct irq_domain *domain,
unsigned int irq_base,
unsigned int nr_irqs, void *arg)
{
- int ret = 0;
- struct irq_domain *parent = domain->parent;
- bool recursive = irq_domain_is_auto_recursive(domain);
-
- BUG_ON(recursive && !parent);
- if (recursive)
- ret = irq_domain_alloc_irqs_recursive(parent, irq_base,
- nr_irqs, arg);
- if (ret < 0)
- return ret;
-
- ret = domain->ops->alloc(domain, irq_base, nr_irqs, arg);
- if (ret < 0 && recursive)
- irq_domain_free_irqs_recursive(parent, irq_base, nr_irqs);
-
- return ret;
+ return domain->ops->alloc(domain, irq_base, nr_irqs, arg);
}
/**
}
mutex_lock(&irq_domain_mutex);
- ret = irq_domain_alloc_irqs_recursive(domain, virq, nr_irqs, arg);
+ ret = irq_domain_alloc_irqs_hierarchy(domain, virq, nr_irqs, arg);
if (ret < 0) {
mutex_unlock(&irq_domain_mutex);
goto out_free_irq_data;
mutex_lock(&irq_domain_mutex);
for (i = 0; i < nr_irqs; i++)
irq_domain_remove_irq(virq + i);
- irq_domain_free_irqs_recursive(data->domain, virq, nr_irqs);
+ irq_domain_free_irqs_hierarchy(data->domain, virq, nr_irqs);
mutex_unlock(&irq_domain_mutex);
irq_domain_free_irq_data(virq, nr_irqs);
unsigned int irq_base, unsigned int nr_irqs,
void *arg)
{
- /* irq_domain_alloc_irqs_recursive() has called parent's alloc() */
- if (irq_domain_is_auto_recursive(domain))
- return 0;
+ if (!domain->parent)
+ return -ENOSYS;
- domain = domain->parent;
- if (domain)
- return irq_domain_alloc_irqs_recursive(domain, irq_base,
- nr_irqs, arg);
- return -ENOSYS;
+ return irq_domain_alloc_irqs_hierarchy(domain->parent, irq_base,
+ nr_irqs, arg);
}
EXPORT_SYMBOL_GPL(irq_domain_alloc_irqs_parent);
void irq_domain_free_irqs_parent(struct irq_domain *domain,
unsigned int irq_base, unsigned int nr_irqs)
{
- /* irq_domain_free_irqs_recursive() will call parent's free */
- if (!irq_domain_is_auto_recursive(domain) && domain->parent)
- irq_domain_free_irqs_recursive(domain->parent, irq_base,
- nr_irqs);
+ if (!domain->parent)
+ return;
+
+ irq_domain_free_irqs_hierarchy(domain->parent, irq_base, nr_irqs);
}
EXPORT_SYMBOL_GPL(irq_domain_free_irqs_parent);
{
}
#endif /* CONFIG_IRQ_DOMAIN_HIERARCHY */
+
+#ifdef CONFIG_GENERIC_IRQ_DEBUGFS
+static struct dentry *domain_dir;
+
+static void
+irq_domain_debug_show_one(struct seq_file *m, struct irq_domain *d, int ind)
+{
+ seq_printf(m, "%*sname: %s\n", ind, "", d->name);
+ seq_printf(m, "%*ssize: %u\n", ind + 1, "",
+ d->revmap_size + d->revmap_direct_max_irq);
+ seq_printf(m, "%*smapped: %u\n", ind + 1, "", d->mapcount);
+ seq_printf(m, "%*sflags: 0x%08x\n", ind +1 , "", d->flags);
+#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
+ if (!d->parent)
+ return;
+ seq_printf(m, "%*sparent: %s\n", ind + 1, "", d->parent->name);
+ irq_domain_debug_show_one(m, d->parent, ind + 4);
+#endif
+}
+
+static int irq_domain_debug_show(struct seq_file *m, void *p)
+{
+ struct irq_domain *d = m->private;
+
+ /* Default domain? Might be NULL */
+ if (!d) {
+ if (!irq_default_domain)
+ return 0;
+ d = irq_default_domain;
+ }
+ irq_domain_debug_show_one(m, d, 0);
+ return 0;
+}
+
+static int irq_domain_debug_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, irq_domain_debug_show, inode->i_private);
+}
+
+static const struct file_operations dfs_domain_ops = {
+ .open = irq_domain_debug_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static void debugfs_add_domain_dir(struct irq_domain *d)
+{
+ if (!d->name || !domain_dir || d->debugfs_file)
+ return;
+ d->debugfs_file = debugfs_create_file(d->name, 0444, domain_dir, d,
+ &dfs_domain_ops);
+}
+
+static void debugfs_remove_domain_dir(struct irq_domain *d)
+{
+ debugfs_remove(d->debugfs_file);
+}
+
+void __init irq_domain_debugfs_init(struct dentry *root)
+{
+ struct irq_domain *d;
+
+ domain_dir = debugfs_create_dir("domains", root);
+ if (!domain_dir)
+ return;
+
+ debugfs_create_file("default", 0444, domain_dir, NULL, &dfs_domain_ops);
+ mutex_lock(&irq_domain_mutex);
+ list_for_each_entry(d, &irq_domain_list, link)
+ debugfs_add_domain_dir(d);
+ mutex_unlock(&irq_domain_mutex);
+}
+#endif
projects / karo-tx-linux.git / blobdiff