[PATCH v5 10/27] irq_domain: Remove references to old irq_host names

Grant Likely
2012-02-16T09:09:11Z

No functional changes. Replaces non-exported references to 'host' with domain.
Does not change any symbol names referenced by other .c files.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Milton Miller <miltonm@bga.com>
Tested-by: Olof Johansson <olof@lixom.net>
---
kernel/irq/irqdomain.c | 219 ++++++++++++++++++++++++------------------------
1 files changed, 108 insertions(+), 111 deletions(-)

diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index b1c4e21..e26b921 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -19,11 +19,11 @@ static DEFINE_MUTEX(irq_domain_mutex);
#ifdef CONFIG_PPC
static DEFINE_MUTEX(revmap_trees_mutex);
static unsigned int irq_virq_count = NR_IRQS;
-static struct irq_domain *irq_default_host;
+static struct irq_domain *irq_default_domain;

-static int default_irq_host_match(struct irq_domain *h, struct device_node *np)
+static int default_irq_domain_match(struct irq_domain *d, struct device_node *np)
{
- return h->of_node != NULL && h->of_node == np;
+ return d->of_node != NULL && d->of_node == np;
}

/**
@@ -31,8 +31,8 @@ static int default_irq_host_match(struct irq_domain *h, struct device_node *np)
* @of_node: optional device-tree node of the interrupt controller
* @revmap_type: type of reverse mapping to use
* @revmap_arg: for IRQ_DOMAIN_MAP_LINEAR linear only: size of the map
- * @ops: map/unmap host callbacks
- * @inval_irq: provide a hw number in that host space that is always invalid
+ * @ops: map/unmap domain callbacks
+ * @inval_irq: provide a hw number in that domain space that is always invalid
*
* Allocates and initialize and irq_domain structure. Note that in the case of
* IRQ_DOMAIN_MAP_LEGACY, the map() callback will be called before this returns
@@ -48,7 +48,7 @@ struct irq_domain *irq_alloc_host(struct device_node *of_node,
struct irq_domain_ops *ops,
irq_hw_number_t inval_irq)
{
- struct irq_domain *host, *h;
+ struct irq_domain *domain, *h;
unsigned int size = sizeof(struct irq_domain);
unsigned int i;
unsigned int *rmap;
@@ -56,18 +56,18 @@ struct irq_domain *irq_alloc_host(struct device_node *of_node,
/* Allocate structure and revmap table if using linear mapping */
if (revmap_type == IRQ_DOMAIN_MAP_LINEAR)
size += revmap_arg * sizeof(unsigned int);
- host = kzalloc(size, GFP_KERNEL);
- if (host == NULL)
+ domain = kzalloc(size, GFP_KERNEL);
+ if (domain == NULL)
return NULL;

/* Fill structure */
- host->revmap_type = revmap_type;
- host->inval_irq = inval_irq;
- host->ops = ops;
- host->of_node = of_node_get(of_node);
+ domain->revmap_type = revmap_type;
+ domain->inval_irq = inval_irq;
+ domain->ops = ops;
+ domain->of_node = of_node_get(of_node);

- if (host->ops->match == NULL)
- host->ops->match = default_irq_host_match;
+ if (domain->ops->match == NULL)
+ domain->ops->match = default_irq_domain_match;

mutex_lock(&irq_domain_mutex);
/* Make sure only one legacy controller can be created */
@@ -75,53 +75,53 @@ struct irq_domain *irq_alloc_host(struct device_node *of_node,
list_for_each_entry(h, &irq_domain_list, link) {
if (WARN_ON(h->revmap_type == IRQ_DOMAIN_MAP_LEGACY)) {
mutex_unlock(&irq_domain_mutex);
- of_node_put(host->of_node);
- kfree(host);
+ of_node_put(domain->of_node);
+ kfree(domain);
return NULL;
}
}
}
- list_add(&host->link, &irq_domain_list);
+ list_add(&domain->link, &irq_domain_list);
mutex_unlock(&irq_domain_mutex);

/* Additional setups per revmap type */
switch(revmap_type) {
case IRQ_DOMAIN_MAP_LEGACY:
/* 0 is always the invalid number for legacy */
- host->inval_irq = 0;
- /* setup us as the host for all legacy interrupts */
+ domain->inval_irq = 0;
+ /* setup us as the domain for all legacy interrupts */
for (i = 1; i < NUM_ISA_INTERRUPTS; i++) {
struct irq_data *irq_data = irq_get_irq_data(i);
irq_data->hwirq = i;
- irq_data->domain = host;
+ irq_data->domain = domain;

/* Legacy flags are left to default at this point,
* one can then use irq_create_mapping() to
* explicitly change them
*/
- ops->map(host, i, i);
+ ops->map(domain, i, i);

/* Clear norequest flags */
irq_clear_status_flags(i, IRQ_NOREQUEST);
}
break;
case IRQ_DOMAIN_MAP_LINEAR:
- rmap = (unsigned int *)(host + 1);
+ rmap = (unsigned int *)(domain + 1);
for (i = 0; i < revmap_arg; i++)
rmap[i] = 0;
- host->revmap_data.linear.size = revmap_arg;
- host->revmap_data.linear.revmap = rmap;
+ domain->revmap_data.linear.size = revmap_arg;
+ domain->revmap_data.linear.revmap = rmap;
break;
case IRQ_DOMAIN_MAP_TREE:
- INIT_RADIX_TREE(&host->revmap_data.tree, GFP_KERNEL);
+ INIT_RADIX_TREE(&domain->revmap_data.tree, GFP_KERNEL);
break;
default:
break;
}

- pr_debug("irq: Allocated host of type %d @0x%p\n", revmap_type, host);
+ pr_debug("irq: Allocated domain of type %d @0x%p\n", revmap_type, domain);

- return host;
+ return domain;
}

/**
@@ -150,18 +150,18 @@ EXPORT_SYMBOL_GPL(irq_find_host);

/**
* irq_set_default_host() - Set a "default" irq domain
- * @host: default host pointer
+ * @domain: default domain pointer
*
* For convenience, it's possible to set a "default" domain that will be used
* whenever NULL is passed to irq_create_mapping(). It makes life easier for
* platforms that want to manipulate a few hard coded interrupt numbers that
* aren't properly represented in the device-tree.
*/
-void irq_set_default_host(struct irq_domain *host)
+void irq_set_default_host(struct irq_domain *domain)
{
- pr_debug("irq: Default host set to @0x%p\n", host);
+ pr_debug("irq: Default domain set to @0x%p\n", domain);

- irq_default_host = host;
+ irq_default_domain = domain;
}

/**
@@ -180,14 +180,14 @@ void irq_set_virq_count(unsigned int count)
irq_virq_count = count;
}

-static int irq_setup_virq(struct irq_domain *host, unsigned int virq,
+static int irq_setup_virq(struct irq_domain *domain, unsigned int virq,
irq_hw_number_t hwirq)
{
struct irq_data *irq_data = irq_get_irq_data(virq);

irq_data->hwirq = hwirq;
- irq_data->domain = host;
- if (host->ops->map(host, virq, hwirq)) {
+ irq_data->domain = domain;
+ if (domain->ops->map(domain, virq, hwirq)) {
pr_debug("irq: -> mapping failed, freeing\n");
irq_data->domain = NULL;
irq_data->hwirq = 0;
@@ -201,21 +201,21 @@ static int irq_setup_virq(struct irq_domain *host, unsigned int virq,

/**
* irq_create_direct_mapping() - Allocate an irq for direct mapping
- * @host: domain to allocate the irq for or NULL for default host
+ * @domain: domain to allocate the irq for or NULL for default domain
*
* This routine is used for irq controllers which can choose the hardware
* interrupt numbers they generate. In such a case it's simplest to use
* the linux irq as the hardware interrupt number.
*/
-unsigned int irq_create_direct_mapping(struct irq_domain *host)
+unsigned int irq_create_direct_mapping(struct irq_domain *domain)
{
unsigned int virq;

- if (host == NULL)
- host = irq_default_host;
+ if (domain == NULL)
+ domain = irq_default_domain;

- BUG_ON(host == NULL);
- WARN_ON(host->revmap_type != IRQ_DOMAIN_MAP_NOMAP);
+ BUG_ON(domain == NULL);
+ WARN_ON(domain->revmap_type != IRQ_DOMAIN_MAP_NOMAP);

virq = irq_alloc_desc_from(1, 0);
if (!virq) {
@@ -231,7 +231,7 @@ unsigned int irq_create_direct_mapping(struct irq_domain *host)

pr_debug("irq: create_direct obtained virq %d\n", virq);

- if (irq_setup_virq(host, virq, virq)) {
+ if (irq_setup_virq(domain, virq, virq)) {
irq_free_desc(virq);
return 0;
}
@@ -241,41 +241,41 @@ unsigned int irq_create_direct_mapping(struct irq_domain *host)

/**
* irq_create_mapping() - Map a hardware interrupt into linux irq space
- * @host: host owning this hardware interrupt or NULL for default host
- * @hwirq: hardware irq number in that host space
+ * @domain: domain owning this hardware interrupt or NULL for default domain
+ * @hwirq: hardware irq number in that domain space
*
* Only one mapping per hardware interrupt is permitted. Returns a linux
* irq number.
* If the sense/trigger is to be specified, set_irq_type() should be called
* on the number returned from that call.
*/
-unsigned int irq_create_mapping(struct irq_domain *host,
+unsigned int irq_create_mapping(struct irq_domain *domain,
irq_hw_number_t hwirq)
{
unsigned int virq, hint;

- pr_debug("irq: irq_create_mapping(0x%p, 0x%lx)\n", host, hwirq);
+ pr_debug("irq: irq_create_mapping(0x%p, 0x%lx)\n", domain, hwirq);

- /* Look for default host if nececssary */
- if (host == NULL)
- host = irq_default_host;
- if (host == NULL) {
+ /* Look for default domain if nececssary */
+ if (domain == NULL)
+ domain = irq_default_domain;
+ if (domain == NULL) {
printk(KERN_WARNING "irq_create_mapping called for"
- " NULL host, hwirq=%lx\n", hwirq);
+ " NULL domain, hwirq=%lx\n", hwirq);
WARN_ON(1);
return 0;
}
- pr_debug("irq: -> using host @%p\n", host);
+ pr_debug("irq: -> using domain @%p\n", domain);

/* Check if mapping already exists */
- virq = irq_find_mapping(host, hwirq);
+ virq = irq_find_mapping(domain, hwirq);
if (virq) {
pr_debug("irq: -> existing mapping on virq %d\n", virq);
return virq;
}

/* Get a virtual interrupt number */
- if (host->revmap_type == IRQ_DOMAIN_MAP_LEGACY) {
+ if (domain->revmap_type == IRQ_DOMAIN_MAP_LEGACY) {
/* Handle legacy */
virq = (unsigned int)hwirq;
if (virq == 0 || virq >= NUM_ISA_INTERRUPTS)
@@ -295,14 +295,14 @@ unsigned int irq_create_mapping(struct irq_domain *host,
}
}

- if (irq_setup_virq(host, virq, hwirq)) {
- if (host->revmap_type != IRQ_DOMAIN_MAP_LEGACY)
+ if (irq_setup_virq(domain, virq, hwirq)) {
+ if (domain->revmap_type != IRQ_DOMAIN_MAP_LEGACY)
irq_free_desc(virq);
return 0;
}

- pr_debug("irq: irq %lu on host %s mapped to virtual irq %u\n",
- hwirq, host->of_node ? host->of_node->full_name : "null", virq);
+ pr_debug("irq: irq %lu on domain %s mapped to virtual irq %u\n",
+ hwirq, domain->of_node ? domain->of_node->full_name : "null", virq);

return virq;
}
@@ -311,32 +311,29 @@ EXPORT_SYMBOL_GPL(irq_create_mapping);
unsigned int irq_create_of_mapping(struct device_node *controller,
const u32 *intspec, unsigned int intsize)
{
- struct irq_domain *host;
+ struct irq_domain *domain;
irq_hw_number_t hwirq;
unsigned int type = IRQ_TYPE_NONE;
unsigned int virq;

- if (controller == NULL)
- host = irq_default_host;
- else
- host = irq_find_host(controller);
- if (host == NULL) {
- printk(KERN_WARNING "irq: no irq host found for %s !\n",
+ domain = controller ? irq_find_host(controller) : irq_default_domain;
+ if (!domain) {
+ printk(KERN_WARNING "irq: no irq domain found for %s !\n",
controller->full_name);
return 0;
}

- /* If host has no translation, then we assume interrupt line */
- if (host->ops->xlate == NULL)
+ /* If domain has no translation, then we assume interrupt line */
+ if (domain->ops->xlate == NULL)
hwirq = intspec[0];
else {
- if (host->ops->xlate(host, controller, intspec, intsize,
+ if (domain->ops->xlate(domain, controller, intspec, intsize,
&hwirq, &type))
return 0;
}

/* Create mapping */
- virq = irq_create_mapping(host, hwirq);
+ virq = irq_create_mapping(domain, hwirq);
if (!virq)
return virq;

@@ -355,18 +352,18 @@ EXPORT_SYMBOL_GPL(irq_create_of_mapping);
void irq_dispose_mapping(unsigned int virq)
{
struct irq_data *irq_data = irq_get_irq_data(virq);
- struct irq_domain *host;
+ struct irq_domain *domain;
irq_hw_number_t hwirq;

if (!virq || !irq_data)
return;

- host = irq_data->domain;
- if (WARN_ON(host == NULL))
+ domain = irq_data->domain;
+ if (WARN_ON(domain == NULL))
return;

/* Never unmap legacy interrupts */
- if (host->revmap_type == IRQ_DOMAIN_MAP_LEGACY)
+ if (domain->revmap_type == IRQ_DOMAIN_MAP_LEGACY)
return;

irq_set_status_flags(virq, IRQ_NOREQUEST);
@@ -378,26 +375,26 @@ void irq_dispose_mapping(unsigned int virq)
synchronize_irq(virq);

/* Tell the PIC about it */
- if (host->ops->unmap)
- host->ops->unmap(host, virq);
+ if (domain->ops->unmap)
+ domain->ops->unmap(domain, virq);
smp_mb();

/* Clear reverse map */
hwirq = irq_data->hwirq;
- switch(host->revmap_type) {
+ switch(domain->revmap_type) {
case IRQ_DOMAIN_MAP_LINEAR:
- if (hwirq < host->revmap_data.linear.size)
- host->revmap_data.linear.revmap[hwirq] = 0;
+ if (hwirq < domain->revmap_data.linear.size)
+ domain->revmap_data.linear.revmap[hwirq] = 0;
break;
case IRQ_DOMAIN_MAP_TREE:
mutex_lock(&revmap_trees_mutex);
- radix_tree_delete(&host->revmap_data.tree, hwirq);
+ radix_tree_delete(&domain->revmap_data.tree, hwirq);
mutex_unlock(&revmap_trees_mutex);
break;
}

/* Destroy map */
- irq_data->hwirq = host->inval_irq;
+ irq_data->hwirq = domain->inval_irq;

irq_free_desc(virq);
}
@@ -405,27 +402,27 @@ EXPORT_SYMBOL_GPL(irq_dispose_mapping);

/**
* irq_find_mapping() - Find a linux irq from an hw irq number.
- * @host: domain owning this hardware interrupt
- * @hwirq: hardware irq number in that host space
+ * @domain: domain owning this hardware interrupt
+ * @hwirq: hardware irq number in that domain space
*
* This is a slow path, for use by generic code. It's expected that an
* irq controller implementation directly calls the appropriate low level
* mapping function.
*/
-unsigned int irq_find_mapping(struct irq_domain *host,
+unsigned int irq_find_mapping(struct irq_domain *domain,
irq_hw_number_t hwirq)
{
unsigned int i;
unsigned int hint = hwirq % irq_virq_count;

- /* Look for default host if nececssary */
- if (host == NULL)
- host = irq_default_host;
- if (host == NULL)
+ /* Look for default domain if nececssary */
+ if (domain == NULL)
+ domain = irq_default_domain;
+ if (domain == NULL)
return 0;

/* legacy -> bail early */
- if (host->revmap_type == IRQ_DOMAIN_MAP_LEGACY)
+ if (domain->revmap_type == IRQ_DOMAIN_MAP_LEGACY)
return hwirq;

/* Slow path does a linear search of the map */
@@ -434,7 +431,7 @@ unsigned int irq_find_mapping(struct irq_domain *host,
i = hint;
do {
struct irq_data *data = irq_get_irq_data(i);
- if (data && (data->domain == host) && (data->hwirq == hwirq))
+ if (data && (data->domain == domain) && (data->hwirq == hwirq))
return i;
i++;
if (i >= irq_virq_count)
@@ -446,26 +443,26 @@ EXPORT_SYMBOL_GPL(irq_find_mapping);

/**
* irq_radix_revmap_lookup() - Find a linux irq from a hw irq number.
- * @host: host owning this hardware interrupt
- * @hwirq: hardware irq number in that host space
+ * @domain: domain owning this hardware interrupt
+ * @hwirq: hardware irq number in that domain space
*
* This is a fast path, for use by irq controller code that uses radix tree
* revmaps
*/
-unsigned int irq_radix_revmap_lookup(struct irq_domain *host,
+unsigned int irq_radix_revmap_lookup(struct irq_domain *domain,
irq_hw_number_t hwirq)
{
struct irq_data *irq_data;

- if (WARN_ON_ONCE(host->revmap_type != IRQ_DOMAIN_MAP_TREE))
- return irq_find_mapping(host, hwirq);
+ if (WARN_ON_ONCE(domain->revmap_type != IRQ_DOMAIN_MAP_TREE))
+ return irq_find_mapping(domain, hwirq);

/*
* Freeing an irq can delete nodes along the path to
* do the lookup via call_rcu.
*/
rcu_read_lock();
- irq_data = radix_tree_lookup(&host->revmap_data.tree, hwirq);
+ irq_data = radix_tree_lookup(&domain->revmap_data.tree, hwirq);
rcu_read_unlock();

/*
@@ -473,62 +470,62 @@ unsigned int irq_radix_revmap_lookup(struct irq_domain *host,
* Else fallback to linear lookup - this should not happen in practice
* as it means that we failed to insert the node in the radix tree.
*/
- return irq_data ? irq_data->irq : irq_find_mapping(host, hwirq);
+ return irq_data ? irq_data->irq : irq_find_mapping(domain, hwirq);
}

/**
* irq_radix_revmap_insert() - Insert a hw irq to linux irq number mapping.
- * @host: host owning this hardware interrupt
+ * @domain: domain owning this hardware interrupt
* @virq: linux irq number
- * @hwirq: hardware irq number in that host space
+ * @hwirq: hardware irq number in that domain space
*
* This is for use by irq controllers that use a radix tree reverse
* mapping for fast lookup.
*/
-void irq_radix_revmap_insert(struct irq_domain *host, unsigned int virq,
+void irq_radix_revmap_insert(struct irq_domain *domain, unsigned int virq,
irq_hw_number_t hwirq)
{
struct irq_data *irq_data = irq_get_irq_data(virq);

- if (WARN_ON(host->revmap_type != IRQ_DOMAIN_MAP_TREE))
+ if (WARN_ON(domain->revmap_type != IRQ_DOMAIN_MAP_TREE))
return;

if (virq) {
mutex_lock(&revmap_trees_mutex);
- radix_tree_insert(&host->revmap_data.tree, hwirq, irq_data);
+ radix_tree_insert(&domain->revmap_data.tree, hwirq, irq_data);
mutex_unlock(&revmap_trees_mutex);
}
}

/**
* irq_linear_revmap() - Find a linux irq from a hw irq number.
- * @host: host owning this hardware interrupt
- * @hwirq: hardware irq number in that host space
+ * @domain: domain owning this hardware interrupt
+ * @hwirq: hardware irq number in that domain space
*
* This is a fast path, for use by irq controller code that uses linear
* revmaps. It does fallback to the slow path if the revmap doesn't exist
* yet and will create the revmap entry with appropriate locking
*/
-unsigned int irq_linear_revmap(struct irq_domain *host,
+unsigned int irq_linear_revmap(struct irq_domain *domain,
irq_hw_number_t hwirq)
{
unsigned int *revmap;

- if (WARN_ON_ONCE(host->revmap_type != IRQ_DOMAIN_MAP_LINEAR))
- return irq_find_mapping(host, hwirq);
+ if (WARN_ON_ONCE(domain->revmap_type != IRQ_DOMAIN_MAP_LINEAR))
+ return irq_find_mapping(domain, hwirq);

/* Check revmap bounds */
- if (unlikely(hwirq >= host->revmap_data.linear.size))
- return irq_find_mapping(host, hwirq);
+ if (unlikely(hwirq >= domain->revmap_data.linear.size))
+ return irq_find_mapping(domain, hwirq);

/* Check if revmap was allocated */
- revmap = host->revmap_data.linear.revmap;
+ revmap = domain->revmap_data.linear.revmap;
if (unlikely(revmap == NULL))
- return irq_find_mapping(host, hwirq);
+ return irq_find_mapping(domain, hwirq);

/* Fill up revmap with slow path if no mapping found */
if (unlikely(!revmap[hwirq]))
- revmap[hwirq] = irq_find_mapping(host, hwirq);
+ revmap[hwirq] = irq_find_mapping(domain, hwirq);

return revmap[hwirq];
}
@@ -544,7 +541,7 @@ static int virq_debug_show(struct seq_file *m, void *private)
int i;

seq_printf(m, "%-5s %-7s %-15s %-18s %s\n", "virq", "hwirq",
- "chip name", "chip data", "host name");
+ "chip name", "chip data", "domain name");

for (i = 1; i < nr_irqs; i++) {
desc = irq_to_desc(i);
--
1.7.9