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-rw-r--r--kernel/irq/chip.c13
-rw-r--r--kernel/irq/generic-chip.c314
-rw-r--r--kernel/irq/irqdomain.c587
-rw-r--r--kernel/irq/manage.c17
-rw-r--r--kernel/irq/proc.c2
5 files changed, 473 insertions, 460 deletions
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index cbd97ce..a3bb14f 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -213,6 +213,19 @@ void irq_enable(struct irq_desc *desc)
irq_state_clr_masked(desc);
}
+/**
+ * irq_disable - Mark interupt disabled
+ * @desc: irq descriptor which should be disabled
+ *
+ * If the chip does not implement the irq_disable callback, we
+ * use a lazy disable approach. That means we mark the interrupt
+ * disabled, but leave the hardware unmasked. That's an
+ * optimization because we avoid the hardware access for the
+ * common case where no interrupt happens after we marked it
+ * disabled. If an interrupt happens, then the interrupt flow
+ * handler masks the line at the hardware level and marks it
+ * pending.
+ */
void irq_disable(struct irq_desc *desc)
{
irq_state_set_disabled(desc);
diff --git a/kernel/irq/generic-chip.c b/kernel/irq/generic-chip.c
index c89295a..10e663a 100644
--- a/kernel/irq/generic-chip.c
+++ b/kernel/irq/generic-chip.c
@@ -7,6 +7,7 @@
#include <linux/irq.h>
#include <linux/slab.h>
#include <linux/export.h>
+#include <linux/irqdomain.h>
#include <linux/interrupt.h>
#include <linux/kernel_stat.h>
#include <linux/syscore_ops.h>
@@ -16,11 +17,6 @@
static LIST_HEAD(gc_list);
static DEFINE_RAW_SPINLOCK(gc_lock);
-static inline struct irq_chip_regs *cur_regs(struct irq_data *d)
-{
- return &container_of(d->chip, struct irq_chip_type, chip)->regs;
-}
-
/**
* irq_gc_noop - NOOP function
* @d: irq_data
@@ -39,16 +35,17 @@ void irq_gc_noop(struct irq_data *d)
void irq_gc_mask_disable_reg(struct irq_data *d)
{
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
- u32 mask = 1 << (d->irq - gc->irq_base);
+ struct irq_chip_type *ct = irq_data_get_chip_type(d);
+ u32 mask = d->mask;
irq_gc_lock(gc);
- irq_reg_writel(mask, gc->reg_base + cur_regs(d)->disable);
- gc->mask_cache &= ~mask;
+ irq_reg_writel(mask, gc->reg_base + ct->regs.disable);
+ *ct->mask_cache &= ~mask;
irq_gc_unlock(gc);
}
/**
- * irq_gc_mask_set_mask_bit - Mask chip via setting bit in mask register
+ * irq_gc_mask_set_bit - Mask chip via setting bit in mask register
* @d: irq_data
*
* Chip has a single mask register. Values of this register are cached
@@ -57,16 +54,18 @@ void irq_gc_mask_disable_reg(struct irq_data *d)
void irq_gc_mask_set_bit(struct irq_data *d)
{
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
- u32 mask = 1 << (d->irq - gc->irq_base);
+ struct irq_chip_type *ct = irq_data_get_chip_type(d);
+ u32 mask = d->mask;
irq_gc_lock(gc);
- gc->mask_cache |= mask;
- irq_reg_writel(gc->mask_cache, gc->reg_base + cur_regs(d)->mask);
+ *ct->mask_cache |= mask;
+ irq_reg_writel(*ct->mask_cache, gc->reg_base + ct->regs.mask);
irq_gc_unlock(gc);
}
+EXPORT_SYMBOL_GPL(irq_gc_mask_set_bit);
/**
- * irq_gc_mask_set_mask_bit - Mask chip via clearing bit in mask register
+ * irq_gc_mask_clr_bit - Mask chip via clearing bit in mask register
* @d: irq_data
*
* Chip has a single mask register. Values of this register are cached
@@ -75,13 +74,15 @@ void irq_gc_mask_set_bit(struct irq_data *d)
void irq_gc_mask_clr_bit(struct irq_data *d)
{
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
- u32 mask = 1 << (d->irq - gc->irq_base);
+ struct irq_chip_type *ct = irq_data_get_chip_type(d);
+ u32 mask = d->mask;
irq_gc_lock(gc);
- gc->mask_cache &= ~mask;
- irq_reg_writel(gc->mask_cache, gc->reg_base + cur_regs(d)->mask);
+ *ct->mask_cache &= ~mask;
+ irq_reg_writel(*ct->mask_cache, gc->reg_base + ct->regs.mask);
irq_gc_unlock(gc);
}
+EXPORT_SYMBOL_GPL(irq_gc_mask_clr_bit);
/**
* irq_gc_unmask_enable_reg - Unmask chip via enable register
@@ -93,11 +94,12 @@ void irq_gc_mask_clr_bit(struct irq_data *d)
void irq_gc_unmask_enable_reg(struct irq_data *d)
{
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
- u32 mask = 1 << (d->irq - gc->irq_base);
+ struct irq_chip_type *ct = irq_data_get_chip_type(d);
+ u32 mask = d->mask;
irq_gc_lock(gc);
- irq_reg_writel(mask, gc->reg_base + cur_regs(d)->enable);
- gc->mask_cache |= mask;
+ irq_reg_writel(mask, gc->reg_base + ct->regs.enable);
+ *ct->mask_cache |= mask;
irq_gc_unlock(gc);
}
@@ -108,12 +110,14 @@ void irq_gc_unmask_enable_reg(struct irq_data *d)
void irq_gc_ack_set_bit(struct irq_data *d)
{
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
- u32 mask = 1 << (d->irq - gc->irq_base);
+ struct irq_chip_type *ct = irq_data_get_chip_type(d);
+ u32 mask = d->mask;
irq_gc_lock(gc);
- irq_reg_writel(mask, gc->reg_base + cur_regs(d)->ack);
+ irq_reg_writel(mask, gc->reg_base + ct->regs.ack);
irq_gc_unlock(gc);
}
+EXPORT_SYMBOL_GPL(irq_gc_ack_set_bit);
/**
* irq_gc_ack_clr_bit - Ack pending interrupt via clearing bit
@@ -122,25 +126,27 @@ void irq_gc_ack_set_bit(struct irq_data *d)
void irq_gc_ack_clr_bit(struct irq_data *d)
{
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
- u32 mask = ~(1 << (d->irq - gc->irq_base));
+ struct irq_chip_type *ct = irq_data_get_chip_type(d);
+ u32 mask = ~d->mask;
irq_gc_lock(gc);
- irq_reg_writel(mask, gc->reg_base + cur_regs(d)->ack);
+ irq_reg_writel(mask, gc->reg_base + ct->regs.ack);
irq_gc_unlock(gc);
}
/**
- * irq_gc_mask_disable_reg_and_ack- Mask and ack pending interrupt
+ * irq_gc_mask_disable_reg_and_ack - Mask and ack pending interrupt
* @d: irq_data
*/
void irq_gc_mask_disable_reg_and_ack(struct irq_data *d)
{
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
- u32 mask = 1 << (d->irq - gc->irq_base);
+ struct irq_chip_type *ct = irq_data_get_chip_type(d);
+ u32 mask = d->mask;
irq_gc_lock(gc);
- irq_reg_writel(mask, gc->reg_base + cur_regs(d)->mask);
- irq_reg_writel(mask, gc->reg_base + cur_regs(d)->ack);
+ irq_reg_writel(mask, gc->reg_base + ct->regs.mask);
+ irq_reg_writel(mask, gc->reg_base + ct->regs.ack);
irq_gc_unlock(gc);
}
@@ -151,16 +157,18 @@ void irq_gc_mask_disable_reg_and_ack(struct irq_data *d)
void irq_gc_eoi(struct irq_data *d)
{
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
- u32 mask = 1 << (d->irq - gc->irq_base);
+ struct irq_chip_type *ct = irq_data_get_chip_type(d);
+ u32 mask = d->mask;
irq_gc_lock(gc);
- irq_reg_writel(mask, gc->reg_base + cur_regs(d)->eoi);
+ irq_reg_writel(mask, gc->reg_base + ct->regs.eoi);
irq_gc_unlock(gc);
}
/**
* irq_gc_set_wake - Set/clr wake bit for an interrupt
- * @d: irq_data
+ * @d: irq_data
+ * @on: Indicates whether the wake bit should be set or cleared
*
* For chips where the wake from suspend functionality is not
* configured in a separate register and the wakeup active state is
@@ -169,7 +177,7 @@ void irq_gc_eoi(struct irq_data *d)
int irq_gc_set_wake(struct irq_data *d, unsigned int on)
{
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
- u32 mask = 1 << (d->irq - gc->irq_base);
+ u32 mask = d->mask;
if (!(mask & gc->wake_enabled))
return -EINVAL;
@@ -183,6 +191,19 @@ int irq_gc_set_wake(struct irq_data *d, unsigned int on)
return 0;
}
+static void
+irq_init_generic_chip(struct irq_chip_generic *gc, const char *name,
+ int num_ct, unsigned int irq_base,
+ void __iomem *reg_base, irq_flow_handler_t handler)
+{
+ raw_spin_lock_init(&gc->lock);
+ gc->num_ct = num_ct;
+ gc->irq_base = irq_base;
+ gc->reg_base = reg_base;
+ gc->chip_types->chip.name = name;
+ gc->chip_types->handler = handler;
+}
+
/**
* irq_alloc_generic_chip - Allocate a generic chip and initialize it
* @name: Name of the irq chip
@@ -203,23 +224,183 @@ irq_alloc_generic_chip(const char *name, int num_ct, unsigned int irq_base,
gc = kzalloc(sz, GFP_KERNEL);
if (gc) {
- raw_spin_lock_init(&gc->lock);
- gc->num_ct = num_ct;
- gc->irq_base = irq_base;
- gc->reg_base = reg_base;
- gc->chip_types->chip.name = name;
- gc->chip_types->handler = handler;
+ irq_init_generic_chip(gc, name, num_ct, irq_base, reg_base,
+ handler);
}
return gc;
}
EXPORT_SYMBOL_GPL(irq_alloc_generic_chip);
+static void
+irq_gc_init_mask_cache(struct irq_chip_generic *gc, enum irq_gc_flags flags)
+{
+ struct irq_chip_type *ct = gc->chip_types;
+ u32 *mskptr = &gc->mask_cache, mskreg = ct->regs.mask;
+ int i;
+
+ for (i = 0; i < gc->num_ct; i++) {
+ if (flags & IRQ_GC_MASK_CACHE_PER_TYPE) {
+ mskptr = &ct[i].mask_cache_priv;
+ mskreg = ct[i].regs.mask;
+ }
+ ct[i].mask_cache = mskptr;
+ if (flags & IRQ_GC_INIT_MASK_CACHE)
+ *mskptr = irq_reg_readl(gc->reg_base + mskreg);
+ }
+}
+
+/**
+ * irq_alloc_domain_generic_chip - Allocate generic chips for an irq domain
+ * @d: irq domain for which to allocate chips
+ * @irqs_per_chip: Number of interrupts each chip handles
+ * @num_ct: Number of irq_chip_type instances associated with this
+ * @name: Name of the irq chip
+ * @handler: Default flow handler associated with these chips
+ * @clr: IRQ_* bits to clear in the mapping function
+ * @set: IRQ_* bits to set in the mapping function
+ * @gcflags: Generic chip specific setup flags
+ */
+int irq_alloc_domain_generic_chips(struct irq_domain *d, int irqs_per_chip,
+ int num_ct, const char *name,
+ irq_flow_handler_t handler,
+ unsigned int clr, unsigned int set,
+ enum irq_gc_flags gcflags)
+{
+ struct irq_domain_chip_generic *dgc;
+ struct irq_chip_generic *gc;
+ int numchips, sz, i;
+ unsigned long flags;
+ void *tmp;
+
+ if (d->gc)
+ return -EBUSY;
+
+ numchips = d->revmap_size / irqs_per_chip;
+ if (!numchips)
+ return -EINVAL;
+
+ /* Allocate a pointer, generic chip and chiptypes for each chip */
+ sz = sizeof(*dgc) + numchips * sizeof(gc);
+ sz += numchips * (sizeof(*gc) + num_ct * sizeof(struct irq_chip_type));
+
+ tmp = dgc = kzalloc(sz, GFP_KERNEL);
+ if (!dgc)
+ return -ENOMEM;
+ dgc->irqs_per_chip = irqs_per_chip;
+ dgc->num_chips = numchips;
+ dgc->irq_flags_to_set = set;
+ dgc->irq_flags_to_clear = clr;
+ dgc->gc_flags = gcflags;
+ d->gc = dgc;
+
+ /* Calc pointer to the first generic chip */
+ tmp += sizeof(*dgc) + numchips * sizeof(gc);
+ for (i = 0; i < numchips; i++) {
+ /* Store the pointer to the generic chip */
+ dgc->gc[i] = gc = tmp;
+ irq_init_generic_chip(gc, name, num_ct, i * irqs_per_chip,
+ NULL, handler);
+ gc->domain = d;
+ raw_spin_lock_irqsave(&gc_lock, flags);
+ list_add_tail(&gc->list, &gc_list);
+ raw_spin_unlock_irqrestore(&gc_lock, flags);
+ /* Calc pointer to the next generic chip */
+ tmp += sizeof(*gc) + num_ct * sizeof(struct irq_chip_type);
+ }
+ d->name = name;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(irq_alloc_domain_generic_chips);
+
+/**
+ * irq_get_domain_generic_chip - Get a pointer to the generic chip of a hw_irq
+ * @d: irq domain pointer
+ * @hw_irq: Hardware interrupt number
+ */
+struct irq_chip_generic *
+irq_get_domain_generic_chip(struct irq_domain *d, unsigned int hw_irq)
+{
+ struct irq_domain_chip_generic *dgc = d->gc;
+ int idx;
+
+ if (!dgc)
+ return NULL;
+ idx = hw_irq / dgc->irqs_per_chip;
+ if (idx >= dgc->num_chips)
+ return NULL;
+ return dgc->gc[idx];
+}
+EXPORT_SYMBOL_GPL(irq_get_domain_generic_chip);
+
/*
* Separate lockdep class for interrupt chip which can nest irq_desc
* lock.
*/
static struct lock_class_key irq_nested_lock_class;
+/*
+ * irq_map_generic_chip - Map a generic chip for an irq domain
+ */
+static int irq_map_generic_chip(struct irq_domain *d, unsigned int virq,
+ irq_hw_number_t hw_irq)
+{
+ struct irq_data *data = irq_get_irq_data(virq);
+ struct irq_domain_chip_generic *dgc = d->gc;
+ struct irq_chip_generic *gc;
+ struct irq_chip_type *ct;
+ struct irq_chip *chip;
+ unsigned long flags;
+ int idx;
+
+ if (!d->gc)
+ return -ENODEV;
+
+ idx = hw_irq / dgc->irqs_per_chip;
+ if (idx >= dgc->num_chips)
+ return -EINVAL;
+ gc = dgc->gc[idx];
+
+ idx = hw_irq % dgc->irqs_per_chip;
+
+ if (test_bit(idx, &gc->unused))
+ return -ENOTSUPP;
+
+ if (test_bit(idx, &gc->installed))
+ return -EBUSY;
+
+ ct = gc->chip_types;
+ chip = &ct->chip;
+
+ /* We only init the cache for the first mapping of a generic chip */
+ if (!gc->installed) {
+ raw_spin_lock_irqsave(&gc->lock, flags);
+ irq_gc_init_mask_cache(gc, dgc->gc_flags);
+ raw_spin_unlock_irqrestore(&gc->lock, flags);
+ }
+
+ /* Mark the interrupt as installed */
+ set_bit(idx, &gc->installed);
+
+ if (dgc->gc_flags & IRQ_GC_INIT_NESTED_LOCK)
+ irq_set_lockdep_class(virq, &irq_nested_lock_class);
+
+ if (chip->irq_calc_mask)
+ chip->irq_calc_mask(data);
+ else
+ data->mask = 1 << idx;
+
+ irq_set_chip_and_handler(virq, chip, ct->handler);
+ irq_set_chip_data(virq, gc);
+ irq_modify_status(virq, dgc->irq_flags_to_clear, dgc->irq_flags_to_set);
+ return 0;
+}
+
+struct irq_domain_ops irq_generic_chip_ops = {
+ .map = irq_map_generic_chip,
+ .xlate = irq_domain_xlate_onetwocell,
+};
+EXPORT_SYMBOL_GPL(irq_generic_chip_ops);
+
/**
* irq_setup_generic_chip - Setup a range of interrupts with a generic chip
* @gc: Generic irq chip holding all data
@@ -237,15 +418,14 @@ void irq_setup_generic_chip(struct irq_chip_generic *gc, u32 msk,
unsigned int set)
{
struct irq_chip_type *ct = gc->chip_types;
+ struct irq_chip *chip = &ct->chip;
unsigned int i;
raw_spin_lock(&gc_lock);
list_add_tail(&gc->list, &gc_list);
raw_spin_unlock(&gc_lock);
- /* Init mask cache ? */
- if (flags & IRQ_GC_INIT_MASK_CACHE)
- gc->mask_cache = irq_reg_readl(gc->reg_base + ct->regs.mask);
+ irq_gc_init_mask_cache(gc, flags);
for (i = gc->irq_base; msk; msk >>= 1, i++) {
if (!(msk & 0x01))
@@ -254,7 +434,15 @@ void irq_setup_generic_chip(struct irq_chip_generic *gc, u32 msk,
if (flags & IRQ_GC_INIT_NESTED_LOCK)
irq_set_lockdep_class(i, &irq_nested_lock_class);
- irq_set_chip_and_handler(i, &ct->chip, ct->handler);
+ if (!(flags & IRQ_GC_NO_MASK)) {
+ struct irq_data *d = irq_get_irq_data(i);
+
+ if (chip->irq_calc_mask)
+ chip->irq_calc_mask(d);
+ else
+ d->mask = 1 << (i - gc->irq_base);
+ }
+ irq_set_chip_and_handler(i, chip, ct->handler);
irq_set_chip_data(i, gc);
irq_modify_status(i, clr, set);
}
@@ -265,7 +453,7 @@ EXPORT_SYMBOL_GPL(irq_setup_generic_chip);
/**
* irq_setup_alt_chip - Switch to alternative chip
* @d: irq_data for this interrupt
- * @type Flow type to be initialized
+ * @type: Flow type to be initialized
*
* Only to be called from chip->irq_set_type() callbacks.
*/
@@ -317,6 +505,24 @@ void irq_remove_generic_chip(struct irq_chip_generic *gc, u32 msk,
}
EXPORT_SYMBOL_GPL(irq_remove_generic_chip);
+static struct irq_data *irq_gc_get_irq_data(struct irq_chip_generic *gc)
+{
+ unsigned int virq;
+
+ if (!gc->domain)
+ return irq_get_irq_data(gc->irq_base);
+
+ /*
+ * We don't know which of the irqs has been actually
+ * installed. Use the first one.
+ */
+ if (!gc->installed)
+ return NULL;
+
+ virq = irq_find_mapping(gc->domain, gc->irq_base + __ffs(gc->installed));
+ return virq ? irq_get_irq_data(virq) : NULL;
+}
+
#ifdef CONFIG_PM
static int irq_gc_suspend(void)
{
@@ -325,8 +531,12 @@ static int irq_gc_suspend(void)
list_for_each_entry(gc, &gc_list, list) {
struct irq_chip_type *ct = gc->chip_types;
- if (ct->chip.irq_suspend)
- ct->chip.irq_suspend(irq_get_irq_data(gc->irq_base));
+ if (ct->chip.irq_suspend) {
+ struct irq_data *data = irq_gc_get_irq_data(gc);
+
+ if (data)
+ ct->chip.irq_suspend(data);
+ }
}
return 0;
}
@@ -338,8 +548,12 @@ static void irq_gc_resume(void)
list_for_each_entry(gc, &gc_list, list) {
struct irq_chip_type *ct = gc->chip_types;
- if (ct->chip.irq_resume)
- ct->chip.irq_resume(irq_get_irq_data(gc->irq_base));
+ if (ct->chip.irq_resume) {
+ struct irq_data *data = irq_gc_get_irq_data(gc);
+
+ if (data)
+ ct->chip.irq_resume(data);
+ }
}
}
#else
@@ -354,8 +568,12 @@ static void irq_gc_shutdown(void)
list_for_each_entry(gc, &gc_list, list) {
struct irq_chip_type *ct = gc->chip_types;
- if (ct->chip.irq_pm_shutdown)
- ct->chip.irq_pm_shutdown(irq_get_irq_data(gc->irq_base));
+ if (ct->chip.irq_pm_shutdown) {
+ struct irq_data *data = irq_gc_get_irq_data(gc);
+
+ if (data)
+ ct->chip.irq_pm_shutdown(data);
+ }
}
}
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index a341b3d..706724e 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -16,12 +16,6 @@
#include <linux/smp.h>
#include <linux/fs.h>
-#define IRQ_DOMAIN_MAP_LEGACY 0 /* driver allocated fixed range of irqs.
- * ie. legacy 8259, gets irqs 1..15 */
-#define IRQ_DOMAIN_MAP_NOMAP 1 /* no fast reverse mapping */
-#define IRQ_DOMAIN_MAP_LINEAR 2 /* linear map of interrupts */
-#define IRQ_DOMAIN_MAP_TREE 3 /* radix tree */
-
static LIST_HEAD(irq_domain_list);
static DEFINE_MUTEX(irq_domain_mutex);
@@ -29,9 +23,11 @@ static DEFINE_MUTEX(revmap_trees_mutex);
static struct irq_domain *irq_default_domain;
/**
- * irq_domain_alloc() - Allocate a new irq_domain data structure
+ * __irq_domain_add() - Allocate a new irq_domain data structure
* @of_node: optional device-tree node of the interrupt controller
- * @revmap_type: type of reverse mapping to use
+ * @size: Size of linear map; 0 for radix mapping only
+ * @direct_max: Maximum value of direct maps; Use ~0 for no limit; 0 for no
+ * direct mapping
* @ops: map/unmap domain callbacks
* @host_data: Controller private data pointer
*
@@ -39,41 +35,35 @@ static struct irq_domain *irq_default_domain;
* register allocated irq_domain with irq_domain_register(). Returns pointer
* to IRQ domain, or NULL on failure.
*/
-static struct irq_domain *irq_domain_alloc(struct device_node *of_node,
- unsigned int revmap_type,
- const struct irq_domain_ops *ops,
- void *host_data)
+struct irq_domain *__irq_domain_add(struct device_node *of_node, int size,
+ irq_hw_number_t hwirq_max, int direct_max,
+ const struct irq_domain_ops *ops,
+ void *host_data)
{
struct irq_domain *domain;
- domain = kzalloc_node(sizeof(*domain), GFP_KERNEL,
- of_node_to_nid(of_node));
+ domain = kzalloc_node(sizeof(*domain) + (sizeof(unsigned int) * size),
+ GFP_KERNEL, of_node_to_nid(of_node));
if (WARN_ON(!domain))
return NULL;
/* Fill structure */
- domain->revmap_type = revmap_type;
+ INIT_RADIX_TREE(&domain->revmap_tree, GFP_KERNEL);
domain->ops = ops;
domain->host_data = host_data;
domain->of_node = of_node_get(of_node);
+ domain->hwirq_max = hwirq_max;
+ domain->revmap_size = size;
+ domain->revmap_direct_max_irq = direct_max;
- return domain;
-}
-
-static void irq_domain_free(struct irq_domain *domain)
-{
- of_node_put(domain->of_node);
- kfree(domain);
-}
-
-static void irq_domain_add(struct irq_domain *domain)
-{
mutex_lock(&irq_domain_mutex);
list_add(&domain->link, &irq_domain_list);
mutex_unlock(&irq_domain_mutex);
- pr_debug("Allocated domain of type %d @0x%p\n",
- domain->revmap_type, domain);
+
+ pr_debug("Added domain %s\n", domain->name);
+ return domain;
}
+EXPORT_SYMBOL_GPL(__irq_domain_add);
/**
* irq_domain_remove() - Remove an irq domain.
@@ -87,29 +77,12 @@ void irq_domain_remove(struct irq_domain *domain)
{
mutex_lock(&irq_domain_mutex);
- switch (domain->revmap_type) {
- case IRQ_DOMAIN_MAP_LEGACY:
- /*
- * Legacy domains don't manage their own irq_desc
- * allocations, we expect the caller to handle irq_desc
- * freeing on their own.
- */
- break;
- case IRQ_DOMAIN_MAP_TREE:
- /*
- * radix_tree_delete() takes care of destroying the root
- * node when all entries are removed. Shout if there are
- * any mappings left.
- */
- WARN_ON(domain->revmap_data.tree.height);
- break;
- case IRQ_DOMAIN_MAP_LINEAR:
- kfree(domain->revmap_data.linear.revmap);
- domain->revmap_data.linear.size = 0;
- break;
- case IRQ_DOMAIN_MAP_NOMAP:
- break;
- }
+ /*
+ * radix_tree_delete() takes care of destroying the root
+ * node when all entries are removed. Shout if there are
+ * any mappings left.
+ */
+ WARN_ON(domain->revmap_tree.height);
list_del(&domain->link);
@@ -121,44 +94,30 @@ void irq_domain_remove(struct irq_domain *domain)
mutex_unlock(&irq_domain_mutex);
- pr_debug("Removed domain of type %d @0x%p\n",
- domain->revmap_type, domain);
+ pr_debug("Removed domain %s\n", domain->name);
- irq_domain_free(domain);
+ of_node_put(domain->of_node);
+ kfree(domain);
}
EXPORT_SYMBOL_GPL(irq_domain_remove);
-static unsigned int irq_domain_legacy_revmap(struct irq_domain *domain,
- irq_hw_number_t hwirq)
-{
- irq_hw_number_t first_hwirq = domain->revmap_data.legacy.first_hwirq;
- int size = domain->revmap_data.legacy.size;
-
- if (WARN_ON(hwirq < first_hwirq || hwirq >= first_hwirq + size))
- return 0;
- return hwirq - first_hwirq + domain->revmap_data.legacy.first_irq;
-}
-
/**
- * irq_domain_add_simple() - Allocate and register a simple irq_domain.
+ * 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.
* @size: total number of irqs in mapping
* @first_irq: first number of irq block assigned to the domain,
- * pass zero to assign irqs on-the-fly. This will result in a
- * linear IRQ domain so it is important to use irq_create_mapping()
- * for each used IRQ, especially when SPARSE_IRQ is enabled.
+ * pass zero to assign irqs on-the-fly. If first_irq is non-zero, then
+ * pre-map all of the irqs in the domain to virqs starting at first_irq.
* @ops: map/unmap domain callbacks
* @host_data: Controller private data pointer
*
- * Allocates a legacy irq_domain if irq_base is positive or a linear
- * domain otherwise. For the legacy domain, IRQ descriptors will also
- * be allocated.
+ * Allocates an irq_domain, and optionally if first_irq is positive then also
+ * allocate irq_descs and map all of the hwirqs to virqs starting at first_irq.
*
* This is intended to implement the expected behaviour for most
- * interrupt controllers which is that a linear mapping should
- * normally be used unless the system requires a legacy mapping in
- * order to support supplying interrupt numbers during non-DT
- * registration of devices.
+ * interrupt controllers. If device tree is used, then first_irq will be 0 and
+ * irqs get mapped dynamically on the fly. However, if the controller requires
+ * static virq assignments (non-DT boot) then it will set that up correctly.
*/
struct irq_domain *irq_domain_add_simple(struct device_node *of_node,
unsigned int size,
@@ -166,33 +125,25 @@ struct irq_domain *irq_domain_add_simple(struct device_node *of_node,
const struct irq_domain_ops *ops,
void *host_data)
{
- if (first_irq > 0) {
- int irq_base;
+ struct irq_domain *domain;
+ domain = __irq_domain_add(of_node, size, size, 0, ops, host_data);
+ if (!domain)
+ return NULL;
+
+ if (first_irq > 0) {
if (IS_ENABLED(CONFIG_SPARSE_IRQ)) {
- /*
- * Set the descriptor allocator to search for a
- * 1-to-1 mapping, such as irq_alloc_desc_at().
- * Use of_node_to_nid() which is defined to
- * numa_node_id() on platforms that have no custom
- * implementation.
- */
- irq_base = irq_alloc_descs(first_irq, first_irq, size,
- of_node_to_nid(of_node));
- if (irq_base < 0) {
+ /* attempt to allocated irq_descs */
+ int rc = irq_alloc_descs(first_irq, first_irq, size,
+ of_node_to_nid(of_node));
+ if (rc < 0)
pr_info("Cannot allocate irq_descs @ IRQ%d, assuming pre-allocated\n",
first_irq);
- irq_base = first_irq;
- }
- } else
- irq_base = first_irq;
-
- return irq_domain_add_legacy(of_node, size, irq_base, 0,
- ops, host_data);
+ }
+ irq_domain_associate_many(domain, first_irq, 0, size);
}
- /* A linear domain is the default */
- return irq_domain_add_linear(of_node, size, ops, host_data);
+ return domain;
}
EXPORT_SYMBOL_GPL(irq_domain_add_simple);
@@ -219,131 +170,19 @@ struct irq_domain *irq_domain_add_legacy(struct device_node *of_node,
void *host_data)
{
struct irq_domain *domain;
- unsigned int i;
- domain = irq_domain_alloc(of_node, IRQ_DOMAIN_MAP_LEGACY, ops, host_data);
+ domain = __irq_domain_add(of_node, first_hwirq + size,
+ first_hwirq + size, 0, ops, host_data);
if (!domain)
return NULL;
- domain->revmap_data.legacy.first_irq = first_irq;
- domain->revmap_data.legacy.first_hwirq = first_hwirq;
- domain->revmap_data.legacy.size = size;
-
- mutex_lock(&irq_domain_mutex);
- /* Verify that all the irqs are available */
- for (i = 0; i < size; i++) {
- int irq = first_irq + i;
- struct irq_data *irq_data = irq_get_irq_data(irq);
-
- if (WARN_ON(!irq_data || irq_data->domain)) {
- mutex_unlock(&irq_domain_mutex);
- irq_domain_free(domain);
- return NULL;
- }
- }
-
- /* Claim all of the irqs before registering a legacy domain */
- for (i = 0; i < size; i++) {
- struct irq_data *irq_data = irq_get_irq_data(first_irq + i);
- irq_data->hwirq = first_hwirq + i;
- irq_data->domain = domain;
- }
- mutex_unlock(&irq_domain_mutex);
-
- for (i = 0; i < size; i++) {
- int irq = first_irq + i;
- int hwirq = first_hwirq + i;
-
- /* IRQ0 gets ignored */
- if (!irq)
- continue;
+ irq_domain_associate_many(domain, first_irq, first_hwirq, size);
- /* Legacy flags are left to default at this point,
- * one can then use irq_create_mapping() to
- * explicitly change them
- */
- if (ops->map)
- ops->map(domain, irq, hwirq);
-
- /* Clear norequest flags */
- irq_clear_status_flags(irq, IRQ_NOREQUEST);
- }
-
- irq_domain_add(domain);
return domain;
}
EXPORT_SYMBOL_GPL(irq_domain_add_legacy);
/**
- * irq_domain_add_linear() - Allocate and register a linear revmap irq_domain.
- * @of_node: pointer to interrupt controller's device tree node.
- * @size: Number of interrupts in the domain.
- * @ops: map/unmap domain callbacks
- * @host_data: Controller private data pointer
- */
-struct irq_domain *irq_domain_add_linear(struct device_node *of_node,
- unsigned int size,
- const struct irq_domain_ops *ops,
- void *host_data)
-{
- struct irq_domain *domain;
- unsigned int *revmap;
-
- revmap = kzalloc_node(sizeof(*revmap) * size, GFP_KERNEL,
- of_node_to_nid(of_node));
- if (WARN_ON(!revmap))
- return NULL;
-
- domain = irq_domain_alloc(of_node, IRQ_DOMAIN_MAP_LINEAR, ops, host_data);
- if (!domain) {
- kfree(revmap);
- return NULL;
- }
- domain->revmap_data.linear.size = size;
- domain->revmap_data.linear.revmap = revmap;
- irq_domain_add(domain);
- return domain;
-}
-EXPORT_SYMBOL_GPL(irq_domain_add_linear);
-
-struct irq_domain *irq_domain_add_nomap(struct device_node *of_node,
- unsigned int max_irq,
- const struct irq_domain_ops *ops,
- void *host_data)
-{
- struct irq_domain *domain = irq_domain_alloc(of_node,
- IRQ_DOMAIN_MAP_NOMAP, ops, host_data);
- if (domain) {
- domain->revmap_data.nomap.max_irq = max_irq ? max_irq : ~0;
- irq_domain_add(domain);
- }
- return domain;
-}
-EXPORT_SYMBOL_GPL(irq_domain_add_nomap);
-
-/**
- * irq_domain_add_tree()
- * @of_node: pointer to interrupt controller's device tree node.
- * @ops: map/unmap domain callbacks
- *
- * Note: The radix tree will be allocated later during boot automatically
- * (the reverse mapping will use the slow path until that happens).
- */
-struct irq_domain *irq_domain_add_tree(struct device_node *of_node,
- const struct irq_domain_ops *ops,
- void *host_data)
-{
- struct irq_domain *domain = irq_domain_alloc(of_node,
- IRQ_DOMAIN_MAP_TREE, ops, host_data);
- if (domain) {
- INIT_RADIX_TREE(&domain->revmap_data.tree, GFP_KERNEL);
- irq_domain_add(domain);
- }
- return domain;
-}
-EXPORT_SYMBOL_GPL(irq_domain_add_tree);
-
-/**
* irq_find_host() - Locates a domain for a given device node
* @node: device-tree node of the interrupt controller
*/
@@ -391,125 +230,108 @@ void irq_set_default_host(struct irq_domain *domain)
}
EXPORT_SYMBOL_GPL(irq_set_default_host);
-static void irq_domain_disassociate_many(struct irq_domain *domain,
- unsigned int irq_base, int count)
+static void irq_domain_disassociate(struct irq_domain *domain, unsigned int irq)
{
- /*
- * disassociate in reverse order;
- * not strictly necessary, but nice for unwinding
- */
- while (count--) {
- int irq = irq_base + count;
- struct irq_data *irq_data = irq_get_irq_data(irq);
- irq_hw_number_t hwirq;
+ struct irq_data *irq_data = irq_get_irq_data(irq);
+ irq_hw_number_t hwirq;
- if (WARN_ON(!irq_data || irq_data->domain != domain))
- continue;
+ if (WARN(!irq_data || irq_data->domain != domain,
+ "virq%i doesn't exist; cannot disassociate\n", irq))
+ return;
- hwirq = irq_data->hwirq;
- irq_set_status_flags(irq, IRQ_NOREQUEST);
+ hwirq = irq_data->hwirq;
+ irq_set_status_flags(irq, IRQ_NOREQUEST);
- /* remove chip and handler */
- irq_set_chip_and_handler(irq, NULL, NULL);
+ /* remove chip and handler */
+ irq_set_chip_and_handler(irq, NULL, NULL);
- /* Make sure it's completed */
- synchronize_irq(irq);
+ /* Make sure it's completed */
+ synchronize_irq(irq);
- /* Tell the PIC about it */
- if (domain->ops->unmap)
- domain->ops->unmap(domain, irq);
- smp_mb();
+ /* Tell the PIC about it */
+ if (domain->ops->unmap)
+ domain->ops->unmap(domain, irq);
+ smp_mb();
- irq_data->domain = NULL;
- irq_data->hwirq = 0;
+ irq_data->domain = NULL;
+ irq_data->hwirq = 0;
- /* Clear reverse map */
- switch(domain->revmap_type) {
- case IRQ_DOMAIN_MAP_LINEAR:
- 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(&domain->revmap_data.tree, hwirq);
- mutex_unlock(&revmap_trees_mutex);
- break;
- }
+ /* Clear reverse map for this hwirq */
+ if (hwirq < domain->revmap_size) {
+ domain->linear_revmap[hwirq] = 0;
+ } else {
+ mutex_lock(&revmap_trees_mutex);
+ radix_tree_delete(&domain->revmap_tree, hwirq);
+ mutex_unlock(&revmap_trees_mutex);
}
}
-int irq_domain_associate_many(struct irq_domain *domain, unsigned int irq_base,
- irq_hw_number_t hwirq_base, int count)
+int irq_domain_associate(struct irq_domain *domain, unsigned int virq,
+ irq_hw_number_t hwirq)
{
- unsigned int virq = irq_base;
- irq_hw_number_t hwirq = hwirq_base;
- int i, ret;
+ struct irq_data *irq_data = irq_get_irq_data(virq);
+ int ret;
- pr_debug("%s(%s, irqbase=%i, hwbase=%i, count=%i)\n", __func__,
- of_node_full_name(domain->of_node), irq_base, (int)hwirq_base, count);
+ if (WARN(hwirq >= domain->hwirq_max,
+ "error: hwirq 0x%x is too large for %s\n", (int)hwirq, domain->name))
+ return -EINVAL;
+ if (WARN(!irq_data, "error: virq%i is not allocated", virq))
+ return -EINVAL;
+ if (WARN(irq_data->domain, "error: virq%i is already associated", virq))
+ return -EINVAL;
- for (i = 0; i < count; i++) {
- struct irq_data *irq_data = irq_get_irq_data(virq + i);
-
- if (WARN(!irq_data, "error: irq_desc not allocated; "
- "irq=%i hwirq=0x%x\n", virq + i, (int)hwirq + i))
- return -EINVAL;
- if (WARN(irq_data->domain, "error: irq_desc already associated; "
- "irq=%i hwirq=0x%x\n", virq + i, (int)hwirq + i))
- return -EINVAL;
- };
-
- for (i = 0; i < count; i++, virq++, hwirq++) {
- struct irq_data *irq_data = irq_get_irq_data(virq);
-
- irq_data->hwirq = hwirq;
- irq_data->domain = domain;
- if (domain->ops->map) {
- ret = domain->ops->map(domain, virq, hwirq);
- if (ret != 0) {
- /*
- * If map() returns -EPERM, this interrupt is protected
- * by the firmware or some other service and shall not
- * be mapped.
- *
- * Since on some platforms we blindly try to map everything
- * we end up with a log full of backtraces.
- *
- * So instead, we silently fail on -EPERM, it is the
- * responsibility of the PIC driver to display a relevant
- * message if needed.
- */
- if (ret != -EPERM) {
- pr_err("irq-%i==>hwirq-0x%lx mapping failed: %d\n",
- virq, hwirq, ret);
- WARN_ON(1);
- }
- irq_data->domain = NULL;
- irq_data->hwirq = 0;
- goto err_unmap;
+ mutex_lock(&irq_domain_mutex);
+ irq_data->hwirq = hwirq;
+ irq_data->domain = domain;
+ if (domain->ops->map) {
+ ret = domain->ops->map(domain, virq, hwirq);
+ if (ret != 0) {
+ /*
+ * If map() returns -EPERM, this interrupt is protected
+ * by the firmware or some other service and shall not
+ * be mapped. Don't bother telling the user about it.
+ */
+ if (ret != -EPERM) {
+ pr_info("%s didn't like hwirq-0x%lx to VIRQ%i mapping (rc=%d)\n",
+ domain->name, hwirq, virq, ret);
}
+ irq_data->domain = NULL;
+ irq_data->hwirq = 0;
+ mutex_unlock(&irq_domain_mutex);
+ return ret;
}
- switch (domain->revmap_type) {
- case IRQ_DOMAIN_MAP_LINEAR:
- if (hwirq < domain->revmap_data.linear.size)
- domain->revmap_data.linear.revmap[hwirq] = virq;
- break;
- case IRQ_DOMAIN_MAP_TREE:
- mutex_lock(&revmap_trees_mutex);
- radix_tree_insert(&domain->revmap_data.tree, hwirq, irq_data);
- mutex_unlock(&revmap_trees_mutex);
- break;
- }
+ /* If not already assigned, give the domain the chip's name */
+ if (!domain->name && irq_data->chip)
+ domain->name = irq_data->chip->name;
+ }
- irq_clear_status_flags(virq, IRQ_NOREQUEST);
+ if (hwirq < domain->revmap_size) {
+ domain->linear_revmap[hwirq] = virq;
+ } else {
+ mutex_lock(&revmap_trees_mutex);
+ radix_tree_insert(&domain->revmap_tree, hwirq, irq_data);
+ mutex_unlock(&revmap_trees_mutex);
}
+ mutex_unlock(&irq_domain_mutex);
+
+ irq_clear_status_flags(virq, IRQ_NOREQUEST);
return 0;
+}
+EXPORT_SYMBOL_GPL(irq_domain_associate);
- err_unmap:
- irq_domain_disassociate_many(domain, irq_base, i);
- return -EINVAL;
+void irq_domain_associate_many(struct irq_domain *domain, unsigned int irq_base,
+ irq_hw_number_t hwirq_base, int count)
+{
+ int i;
+
+ pr_debug("%s(%s, irqbase=%i, hwbase=%i, count=%i)\n", __func__,
+ of_node_full_name(domain->of_node), irq_base, (int)hwirq_base, count);
+
+ for (i = 0; i < count; i++) {
+ irq_domain_associate(domain, irq_base + i, hwirq_base + i);
+ }
}
EXPORT_SYMBOL_GPL(irq_domain_associate_many);
@@ -519,7 +341,9 @@ EXPORT_SYMBOL_GPL(irq_domain_associate_many);
*
* 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.
+ * the linux irq as the hardware interrupt number. It still uses the linear
+ * or radix tree to store the mapping, but the irq controller can optimize
+ * the revmap path by using the hwirq directly.
*/
unsigned int irq_create_direct_mapping(struct irq_domain *domain)
{
@@ -528,17 +352,14 @@ unsigned int irq_create_direct_mapping(struct irq_domain *domain)
if (domain == NULL)
domain = irq_default_domain;
- if (WARN_ON(!domain || domain->revmap_type != IRQ_DOMAIN_MAP_NOMAP))
- return 0;
-
virq = irq_alloc_desc_from(1, of_node_to_nid(domain->of_node));
if (!virq) {
pr_debug("create_direct virq allocation failed\n");
return 0;
}
- if (virq >= domain->revmap_data.nomap.max_irq) {
+ if (virq >= domain->revmap_direct_max_irq) {
pr_err("ERROR: no free irqs available below %i maximum\n",
- domain->revmap_data.nomap.max_irq);
+ domain->revmap_direct_max_irq);
irq_free_desc(virq);
return 0;
}
@@ -575,9 +396,7 @@ unsigned int irq_create_mapping(struct irq_domain *domain,
if (domain == NULL)
domain = irq_default_domain;
if (domain == NULL) {
- pr_warning("irq_create_mapping called for"
- " NULL domain, hwirq=%lx\n", hwirq);
- WARN_ON(1);
+ WARN(1, "%s(, %lx) called with NULL domain\n", __func__, hwirq);
return 0;
}
pr_debug("-> using domain @%p\n", domain);
@@ -589,10 +408,6 @@ unsigned int irq_create_mapping(struct irq_domain *domain,
return virq;
}
- /* Get a virtual interrupt number */
- if (domain->revmap_type == IRQ_DOMAIN_MAP_LEGACY)
- return irq_domain_legacy_revmap(domain, hwirq);
-
/* Allocate a virtual interrupt number */
hint = hwirq % nr_irqs;
if (hint == 0)
@@ -645,12 +460,7 @@ int irq_create_strict_mappings(struct irq_domain *domain, unsigned int irq_base,
if (unlikely(ret < 0))
return ret;
- ret = irq_domain_associate_many(domain, irq_base, hwirq_base, count);
- if (unlikely(ret < 0)) {
- irq_free_descs(irq_base, count);
- return ret;
- }
-
+ irq_domain_associate_many(domain, irq_base, hwirq_base, count);
return 0;
}
EXPORT_SYMBOL_GPL(irq_create_strict_mappings);
@@ -665,8 +475,8 @@ unsigned int irq_create_of_mapping(struct device_node *controller,
domain = controller ? irq_find_host(controller) : irq_default_domain;
if (!domain) {
- pr_warning("no irq domain found for %s !\n",
- of_node_full_name(controller));
+ pr_warn("no irq domain found for %s !\n",
+ of_node_full_name(controller));
return 0;
}
@@ -686,7 +496,7 @@ unsigned int irq_create_of_mapping(struct device_node *controller,
/* Set type if specified and different than the current one */
if (type != IRQ_TYPE_NONE &&
- type != (irqd_get_trigger_type(irq_get_irq_data(virq))))
+ type != irq_get_trigger_type(virq))
irq_set_irq_type(virq, type);
return virq;
}
@@ -708,11 +518,7 @@ void irq_dispose_mapping(unsigned int virq)
if (WARN_ON(domain == NULL))
return;
- /* Never unmap legacy interrupts */
- if (domain->revmap_type == IRQ_DOMAIN_MAP_LEGACY)
- return;
-
- irq_domain_disassociate_many(domain, virq, 1);
+ irq_domain_disassociate(domain, virq);
irq_free_desc(virq);
}
EXPORT_SYMBOL_GPL(irq_dispose_mapping);
@@ -733,63 +539,51 @@ unsigned int irq_find_mapping(struct irq_domain *domain,
if (domain == NULL)
return 0;
- switch (domain->revmap_type) {
- case IRQ_DOMAIN_MAP_LEGACY:
- return irq_domain_legacy_revmap(domain, hwirq);
- case IRQ_DOMAIN_MAP_LINEAR:
- return irq_linear_revmap(domain, hwirq);
- case IRQ_DOMAIN_MAP_TREE:
- rcu_read_lock();
- data = radix_tree_lookup(&domain->revmap_data.tree, hwirq);
- rcu_read_unlock();
- if (data)
- return data->irq;
- break;
- case IRQ_DOMAIN_MAP_NOMAP:
+ if (hwirq < domain->revmap_direct_max_irq) {
data = irq_get_irq_data(hwirq);
if (data && (data->domain == domain) && (data->hwirq == hwirq))
return hwirq;
- break;
}
- return 0;
-}
-EXPORT_SYMBOL_GPL(irq_find_mapping);
-
-/**
- * irq_linear_revmap() - Find a linux irq from a hw irq number.
- * @domain: domain owning this hardware interrupt
- * @hwirq: hardware irq number in that domain space
- *
- * This is a fast path that can be called directly by irq controller code to
- * save a handful of instructions.
- */
-unsigned int irq_linear_revmap(struct irq_domain *domain,
- irq_hw_number_t hwirq)
-{
- BUG_ON(domain->revmap_type != IRQ_DOMAIN_MAP_LINEAR);
-
- /* Check revmap bounds; complain if exceeded */
- if (WARN_ON(hwirq >= domain->revmap_data.linear.size))
- return 0;
+ /* Check if the hwirq is in the linear revmap. */
+ if (hwirq < domain->revmap_size)
+ return domain->linear_revmap[hwirq];
- return domain->revmap_data.linear.revmap[hwirq];
+ rcu_read_lock();
+ data = radix_tree_lookup(&domain->revmap_tree, hwirq);
+ rcu_read_unlock();
+ return data ? data->irq : 0;
}
-EXPORT_SYMBOL_GPL(irq_linear_revmap);
+EXPORT_SYMBOL_GPL(irq_find_mapping);
#ifdef CONFIG_IRQ_DOMAIN_DEBUG
static int virq_debug_show(struct seq_file *m, void *private)
{
unsigned long flags;
struct irq_desc *desc;
- const char *p;
- static const char none[] = "none";
- void *data;
+ struct irq_domain *domain;
+ struct radix_tree_iter iter;
+ void *data, **slot;
int i;
- seq_printf(m, "%-5s %-7s %-15s %-*s %s\n", "irq", "hwirq",
+ seq_printf(m, " %-16s %-6s %-10s %-10s %s\n",
+ "name", "mapped", "linear-max", "direct-max", "devtree-node");
+ mutex_lock(&irq_domain_mutex);
+ list_for_each_entry(domain, &irq_domain_list, link) {
+ int count = 0;
+ 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,
+ domain->of_node ? of_node_full_name(domain->of_node) : "");
+ }
+ mutex_unlock(&irq_domain_mutex);
+
+ seq_printf(m, "%-5s %-7s %-15s %-*s %6s %-14s %s\n", "irq", "hwirq",
"chip name", (int)(2 * sizeof(void *) + 2), "chip data",
- "domain name");
+ "active", "type", "domain");
for (i = 1; i < nr_irqs; i++) {
desc = irq_to_desc(i);
@@ -797,28 +591,28 @@ static int virq_debug_show(struct seq_file *m, void *private)
continue;
raw_spin_lock_irqsave(&desc->lock, flags);
+ domain = desc->irq_data.domain;
- if (desc->action && desc->action->handler) {
+ if (domain) {
struct irq_chip *chip;
+ int hwirq = desc->irq_data.hwirq;
+ bool direct;
seq_printf(m, "%5d ", i);
- seq_printf(m, "0x%05lx ", desc->irq_data.hwirq);
+ seq_printf(m, "0x%05x ", hwirq);
chip = irq_desc_get_chip(desc);
- if (chip && chip->name)
- p = chip->name;
- else
- p = none;
- seq_printf(m, "%-15s ", p);
+ 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);
- if (desc->irq_data.domain)
- p = of_node_full_name(desc->irq_data.domain->of_node);
- else
- p = none;
- seq_printf(m, "%s\n", p);
+ 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);
}
raw_spin_unlock_irqrestore(&desc->lock, flags);
@@ -915,18 +709,3 @@ const struct irq_domain_ops irq_domain_simple_ops = {
.xlate = irq_domain_xlate_onetwocell,
};
EXPORT_SYMBOL_GPL(irq_domain_simple_ops);
-
-#ifdef CONFIG_OF_IRQ
-void irq_domain_generate_simple(const struct of_device_id *match,
- u64 phys_base, unsigned int irq_start)
-{
- struct device_node *node;
- pr_debug("looking for phys_base=%llx, irq_start=%i\n",
- (unsigned long long) phys_base, (int) irq_start);
- node = of_find_matching_node_by_address(NULL, match, phys_base);
- if (node)
- irq_domain_add_legacy(node, 32, irq_start, 0,
- &irq_domain_simple_ops, NULL);
-}
-EXPORT_SYMBOL_GPL(irq_domain_generate_simple);
-#endif
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index fa17855..514bcfd 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -555,9 +555,9 @@ int can_request_irq(unsigned int irq, unsigned long irqflags)
return 0;
if (irq_settings_can_request(desc)) {
- if (desc->action)
- if (irqflags & desc->action->flags & IRQF_SHARED)
- canrequest =1;
+ if (!desc->action ||
+ irqflags & desc->action->flags & IRQF_SHARED)
+ canrequest = 1;
}
irq_put_desc_unlock(desc, flags);
return canrequest;
@@ -840,9 +840,6 @@ static void irq_thread_dtor(struct callback_head *unused)
static int irq_thread(void *data)
{
struct callback_head on_exit_work;
- static const struct sched_param param = {
- .sched_priority = MAX_USER_RT_PRIO/2,
- };
struct irqaction *action = data;
struct irq_desc *desc = irq_to_desc(action->irq);
irqreturn_t (*handler_fn)(struct irq_desc *desc,
@@ -854,8 +851,6 @@ static int irq_thread(void *data)
else
handler_fn = irq_thread_fn;
- sched_setscheduler(current, SCHED_FIFO, &param);
-
init_task_work(&on_exit_work, irq_thread_dtor);
task_work_add(current, &on_exit_work, false);
@@ -950,6 +945,9 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
*/
if (new->thread_fn && !nested) {
struct task_struct *t;
+ static const struct sched_param param = {
+ .sched_priority = MAX_USER_RT_PRIO/2,
+ };
t = kthread_create(irq_thread, new, "irq/%d-%s", irq,
new->name);
@@ -957,6 +955,9 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
ret = PTR_ERR(t);
goto out_mput;
}
+
+ sched_setscheduler(t, SCHED_FIFO, &param);
+
/*
* We keep the reference to the task struct even if
* the thread dies to avoid that the interrupt code
diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
index 19ed5c4..36f6ee1 100644
--- a/kernel/irq/proc.c
+++ b/kernel/irq/proc.c
@@ -462,6 +462,8 @@ int show_interrupts(struct seq_file *p, void *v)
} else {
seq_printf(p, " %8s", "None");
}
+ if (desc->irq_data.domain)
+ seq_printf(p, " %*d", prec, (int) desc->irq_data.hwirq);
#ifdef CONFIG_GENERIC_IRQ_SHOW_LEVEL
seq_printf(p, " %-8s", irqd_is_level_type(&desc->irq_data) ? "Level" : "Edge");
#endif
generated by cgit v0.10.2 at 2024-06-29 23:09:37 (GMT)