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authorLinus Torvalds <torvalds@linux-foundation.org>2022-03-21 13:03:00 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2022-03-21 13:03:00 -0700
commit93287e28bcc8bcb3f23d46196845bf7c311cb8aa (patch)
tree0e571326237e05cd745c6f185e7fdefbb2608b3c /kernel
parent84c2e17951feeea08a1f3a01e71f8fa82b66332a (diff)
parent411472ae5bb4ffe1404dc5f1505f07e0f04770a8 (diff)
Merge tag 'irq-core-2022-03-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull interrupt updates from Thomas Gleixner: "Core code: - Provide generic_handle_irq_safe() which can be invoked from any context (hard interrupt or threaded). This allows to remove ugly workarounds in drivers all over the place. - Use generic_handle_irq_safe() in the affected drivers. - The usual cleanups and improvements. Interrupt chip drivers: - Support for new interrupt chips or not yet supported variants: STM32MP14, Meson GPIO, Apple M1 PMU, Apple M1 AICv2, Qualcomm MPM - Convert the Xilinx driver to generic interrupt domains - Cleanup the irq_chip::name handling - The usual cleanups and improvements all over the place" * tag 'irq-core-2022-03-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (52 commits) irqchip: Add Qualcomm MPM controller driver dt-bindings: interrupt-controller: Add Qualcomm MPM support irqchip/apple-aic: Add support for AICv2 irqchip/apple-aic: Support multiple dies irqchip/apple-aic: Dynamically compute register offsets irqchip/apple-aic: Switch to irq_domain_create_tree and sparse hwirqs irqchip/apple-aic: Add Fast IPI support dt-bindings: interrupt-controller: apple,aic2: New binding for AICv2 PCI: apple: Change MSI handling to handle 4-cell AIC fwspec form irqchip/apple-aic: Fix cpumask allocation for FIQs irqchip/meson-gpio: Add support for meson s4 SoCs irqchip/meson-gpio: add select trigger type callback irqchip/meson-gpio: support more than 8 channels gpio irq dt-bindings: interrupt-controller: New binding for Meson-S4 SoCs irqchip/xilinx: Switch to GENERIC_IRQ_MULTI_HANDLER staging: greybus: gpio: Use generic_handle_irq_safe(). net: usb: lan78xx: Use generic_handle_irq_safe(). mfd: ezx-pcap: Use generic_handle_irq_safe(). misc: hi6421-spmi-pmic: Use generic_handle_irq_safe(). irqchip/sifive-plic: Disable S-mode IRQs if running in M-mode ...
Diffstat (limited to 'kernel')
-rw-r--r--kernel/irq/chip.c29
-rw-r--r--kernel/irq/debugfs.c8
-rw-r--r--kernel/irq/irqdesc.c27
-rw-r--r--kernel/irq/irqdomain.c9
-rw-r--r--kernel/softirq.c10
5 files changed, 59 insertions, 24 deletions
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index c09324663088..54af0deb239b 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -38,7 +38,7 @@ struct irqaction chained_action = {
* @irq: irq number
* @chip: pointer to irq chip description structure
*/
-int irq_set_chip(unsigned int irq, struct irq_chip *chip)
+int irq_set_chip(unsigned int irq, const struct irq_chip *chip)
{
unsigned long flags;
struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0);
@@ -46,10 +46,7 @@ int irq_set_chip(unsigned int irq, struct irq_chip *chip)
if (!desc)
return -EINVAL;
- if (!chip)
- chip = &no_irq_chip;
-
- desc->irq_data.chip = chip;
+ desc->irq_data.chip = (struct irq_chip *)(chip ?: &no_irq_chip);
irq_put_desc_unlock(desc, flags);
/*
* For !CONFIG_SPARSE_IRQ make the irq show up in
@@ -1073,7 +1070,7 @@ irq_set_chained_handler_and_data(unsigned int irq, irq_flow_handler_t handle,
EXPORT_SYMBOL_GPL(irq_set_chained_handler_and_data);
void
-irq_set_chip_and_handler_name(unsigned int irq, struct irq_chip *chip,
+irq_set_chip_and_handler_name(unsigned int irq, const struct irq_chip *chip,
irq_flow_handler_t handle, const char *name)
{
irq_set_chip(irq, chip);
@@ -1558,6 +1555,14 @@ int irq_chip_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
return 0;
}
+static struct device *irq_get_parent_device(struct irq_data *data)
+{
+ if (data->domain)
+ return data->domain->dev;
+
+ return NULL;
+}
+
/**
* irq_chip_pm_get - Enable power for an IRQ chip
* @data: Pointer to interrupt specific data
@@ -1567,12 +1572,13 @@ int irq_chip_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
*/
int irq_chip_pm_get(struct irq_data *data)
{
+ struct device *dev = irq_get_parent_device(data);
int retval;
- if (IS_ENABLED(CONFIG_PM) && data->chip->parent_device) {
- retval = pm_runtime_get_sync(data->chip->parent_device);
+ if (IS_ENABLED(CONFIG_PM) && dev) {
+ retval = pm_runtime_get_sync(dev);
if (retval < 0) {
- pm_runtime_put_noidle(data->chip->parent_device);
+ pm_runtime_put_noidle(dev);
return retval;
}
}
@@ -1590,10 +1596,11 @@ int irq_chip_pm_get(struct irq_data *data)
*/
int irq_chip_pm_put(struct irq_data *data)
{
+ struct device *dev = irq_get_parent_device(data);
int retval = 0;
- if (IS_ENABLED(CONFIG_PM) && data->chip->parent_device)
- retval = pm_runtime_put(data->chip->parent_device);
+ if (IS_ENABLED(CONFIG_PM) && dev)
+ retval = pm_runtime_put(dev);
return (retval < 0) ? retval : 0;
}
diff --git a/kernel/irq/debugfs.c b/kernel/irq/debugfs.c
index e4cff358b437..2b43f5f5033d 100644
--- a/kernel/irq/debugfs.c
+++ b/kernel/irq/debugfs.c
@@ -69,8 +69,12 @@ irq_debug_show_chip(struct seq_file *m, struct irq_data *data, int ind)
seq_printf(m, "chip: None\n");
return;
}
- seq_printf(m, "%*schip: %s\n", ind, "", chip->name);
- seq_printf(m, "%*sflags: 0x%lx\n", ind + 1, "", chip->flags);
+ seq_printf(m, "%*schip: ", ind, "");
+ if (chip->irq_print_chip)
+ chip->irq_print_chip(data, m);
+ else
+ seq_printf(m, "%s", chip->name);
+ seq_printf(m, "\n%*sflags: 0x%lx\n", ind + 1, "", chip->flags);
irq_debug_show_bits(m, ind, chip->flags, irqchip_flags,
ARRAY_SIZE(irqchip_flags));
}
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index 2267e6527db3..939d21cd55c3 100644
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -640,7 +640,7 @@ int handle_irq_desc(struct irq_desc *desc)
return -EINVAL;
data = irq_desc_get_irq_data(desc);
- if (WARN_ON_ONCE(!in_irq() && handle_enforce_irqctx(data)))
+ if (WARN_ON_ONCE(!in_hardirq() && handle_enforce_irqctx(data)))
return -EPERM;
generic_handle_irq_desc(desc);
@@ -662,6 +662,29 @@ int generic_handle_irq(unsigned int irq)
}
EXPORT_SYMBOL_GPL(generic_handle_irq);
+/**
+ * generic_handle_irq_safe - Invoke the handler for a particular irq from any
+ * context.
+ * @irq: The irq number to handle
+ *
+ * Returns: 0 on success, a negative value on error.
+ *
+ * This function can be called from any context (IRQ or process context). It
+ * will report an error if not invoked from IRQ context and the irq has been
+ * marked to enforce IRQ-context only.
+ */
+int generic_handle_irq_safe(unsigned int irq)
+{
+ unsigned long flags;
+ int ret;
+
+ local_irq_save(flags);
+ ret = handle_irq_desc(irq_to_desc(irq));
+ local_irq_restore(flags);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(generic_handle_irq_safe);
+
#ifdef CONFIG_IRQ_DOMAIN
/**
* generic_handle_domain_irq - Invoke the handler for a HW irq belonging
@@ -676,7 +699,7 @@ EXPORT_SYMBOL_GPL(generic_handle_irq);
*/
int generic_handle_domain_irq(struct irq_domain *domain, unsigned int hwirq)
{
- WARN_ON_ONCE(!in_irq());
+ WARN_ON_ONCE(!in_hardirq());
return handle_irq_desc(irq_resolve_mapping(domain, hwirq));
}
EXPORT_SYMBOL_GPL(generic_handle_domain_irq);
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index bf38c546aa25..d5ce96510549 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -1319,7 +1319,8 @@ EXPORT_SYMBOL_GPL(irq_domain_get_irq_data);
* @chip_data: The associated chip data
*/
int irq_domain_set_hwirq_and_chip(struct irq_domain *domain, unsigned int virq,
- irq_hw_number_t hwirq, struct irq_chip *chip,
+ irq_hw_number_t hwirq,
+ const struct irq_chip *chip,
void *chip_data)
{
struct irq_data *irq_data = irq_domain_get_irq_data(domain, virq);
@@ -1328,7 +1329,7 @@ int irq_domain_set_hwirq_and_chip(struct irq_domain *domain, unsigned int virq,
return -ENOENT;
irq_data->hwirq = hwirq;
- irq_data->chip = chip ? chip : &no_irq_chip;
+ irq_data->chip = (struct irq_chip *)(chip ? chip : &no_irq_chip);
irq_data->chip_data = chip_data;
return 0;
@@ -1347,7 +1348,7 @@ EXPORT_SYMBOL_GPL(irq_domain_set_hwirq_and_chip);
* @handler_name: The interrupt handler name
*/
void irq_domain_set_info(struct irq_domain *domain, unsigned int virq,
- irq_hw_number_t hwirq, struct irq_chip *chip,
+ irq_hw_number_t hwirq, const struct irq_chip *chip,
void *chip_data, irq_flow_handler_t handler,
void *handler_data, const char *handler_name)
{
@@ -1853,7 +1854,7 @@ EXPORT_SYMBOL_GPL(irq_domain_get_irq_data);
* @handler_name: The interrupt handler name
*/
void irq_domain_set_info(struct irq_domain *domain, unsigned int virq,
- irq_hw_number_t hwirq, struct irq_chip *chip,
+ irq_hw_number_t hwirq, const struct irq_chip *chip,
void *chip_data, irq_flow_handler_t handler,
void *handler_data, const char *handler_name)
{
diff --git a/kernel/softirq.c b/kernel/softirq.c
index 41f470929e99..fac801815554 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -222,7 +222,7 @@ void __local_bh_enable_ip(unsigned long ip, unsigned int cnt)
u32 pending;
int curcnt;
- WARN_ON_ONCE(in_irq());
+ WARN_ON_ONCE(in_hardirq());
lockdep_assert_irqs_enabled();
local_irq_save(flags);
@@ -305,7 +305,7 @@ void __local_bh_disable_ip(unsigned long ip, unsigned int cnt)
{
unsigned long flags;
- WARN_ON_ONCE(in_irq());
+ WARN_ON_ONCE(in_hardirq());
raw_local_irq_save(flags);
/*
@@ -352,14 +352,14 @@ static void __local_bh_enable(unsigned int cnt)
*/
void _local_bh_enable(void)
{
- WARN_ON_ONCE(in_irq());
+ WARN_ON_ONCE(in_hardirq());
__local_bh_enable(SOFTIRQ_DISABLE_OFFSET);
}
EXPORT_SYMBOL(_local_bh_enable);
void __local_bh_enable_ip(unsigned long ip, unsigned int cnt)
{
- WARN_ON_ONCE(in_irq());
+ WARN_ON_ONCE(in_hardirq());
lockdep_assert_irqs_enabled();
#ifdef CONFIG_TRACE_IRQFLAGS
local_irq_disable();
@@ -618,7 +618,7 @@ static inline void tick_irq_exit(void)
/* Make sure that timer wheel updates are propagated */
if ((idle_cpu(cpu) && !need_resched()) || tick_nohz_full_cpu(cpu)) {
- if (!in_irq())
+ if (!in_hardirq())
tick_nohz_irq_exit();
}
#endif