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https://mirrors.bfsu.edu.cn/git/linux.git
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Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: genirq: Add IRQF_RESUME_EARLY and resume such IRQs earlier genirq: Fix fatfinered fixup really genirq: percpu: allow interrupt type to be set at enable time genirq: Add support for per-cpu dev_id interrupts genirq: Add IRQCHIP_SKIP_SET_WAKE flag
This commit is contained in:
Linus Torvalds
commit
1f6e05171b
@ -1049,7 +1049,7 @@ int bind_ipi_to_irqhandler(enum ipi_vector ipi,
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if (irq < 0)
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return irq;
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irqflags |= IRQF_NO_SUSPEND | IRQF_FORCE_RESUME;
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irqflags |= IRQF_NO_SUSPEND | IRQF_FORCE_RESUME | IRQF_EARLY_RESUME;
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retval = request_irq(irq, handler, irqflags, devname, dev_id);
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if (retval != 0) {
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unbind_from_irq(irq);
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@ -59,6 +59,8 @@
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* IRQF_NO_SUSPEND - Do not disable this IRQ during suspend
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* IRQF_FORCE_RESUME - Force enable it on resume even if IRQF_NO_SUSPEND is set
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* IRQF_NO_THREAD - Interrupt cannot be threaded
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* IRQF_EARLY_RESUME - Resume IRQ early during syscore instead of at device
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* resume time.
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*/
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#define IRQF_DISABLED 0x00000020
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#define IRQF_SAMPLE_RANDOM 0x00000040
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@ -72,6 +74,7 @@
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#define IRQF_NO_SUSPEND 0x00004000
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#define IRQF_FORCE_RESUME 0x00008000
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#define IRQF_NO_THREAD 0x00010000
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#define IRQF_EARLY_RESUME 0x00020000
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#define IRQF_TIMER (__IRQF_TIMER | IRQF_NO_SUSPEND | IRQF_NO_THREAD)
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@ -95,6 +98,7 @@ typedef irqreturn_t (*irq_handler_t)(int, void *);
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* @flags: flags (see IRQF_* above)
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* @name: name of the device
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* @dev_id: cookie to identify the device
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* @percpu_dev_id: cookie to identify the device
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* @next: pointer to the next irqaction for shared interrupts
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* @irq: interrupt number
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* @dir: pointer to the proc/irq/NN/name entry
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@ -104,17 +108,18 @@ typedef irqreturn_t (*irq_handler_t)(int, void *);
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* @thread_mask: bitmask for keeping track of @thread activity
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*/
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struct irqaction {
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irq_handler_t handler;
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unsigned long flags;
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void *dev_id;
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struct irqaction *next;
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int irq;
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irq_handler_t thread_fn;
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struct task_struct *thread;
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unsigned long thread_flags;
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unsigned long thread_mask;
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const char *name;
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struct proc_dir_entry *dir;
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irq_handler_t handler;
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unsigned long flags;
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void *dev_id;
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void __percpu *percpu_dev_id;
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struct irqaction *next;
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int irq;
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irq_handler_t thread_fn;
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struct task_struct *thread;
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unsigned long thread_flags;
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unsigned long thread_mask;
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const char *name;
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struct proc_dir_entry *dir;
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} ____cacheline_internodealigned_in_smp;
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extern irqreturn_t no_action(int cpl, void *dev_id);
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@ -136,6 +141,10 @@ extern int __must_check
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request_any_context_irq(unsigned int irq, irq_handler_t handler,
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unsigned long flags, const char *name, void *dev_id);
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extern int __must_check
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request_percpu_irq(unsigned int irq, irq_handler_t handler,
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const char *devname, void __percpu *percpu_dev_id);
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extern void exit_irq_thread(void);
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#else
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@ -164,10 +173,18 @@ request_any_context_irq(unsigned int irq, irq_handler_t handler,
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return request_irq(irq, handler, flags, name, dev_id);
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}
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static inline int __must_check
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request_percpu_irq(unsigned int irq, irq_handler_t handler,
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const char *devname, void __percpu *percpu_dev_id)
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{
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return request_irq(irq, handler, 0, devname, percpu_dev_id);
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}
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static inline void exit_irq_thread(void) { }
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#endif
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extern void free_irq(unsigned int, void *);
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extern void free_percpu_irq(unsigned int, void __percpu *);
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struct device;
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@ -207,7 +224,9 @@ extern void devm_free_irq(struct device *dev, unsigned int irq, void *dev_id);
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extern void disable_irq_nosync(unsigned int irq);
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extern void disable_irq(unsigned int irq);
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extern void disable_percpu_irq(unsigned int irq);
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extern void enable_irq(unsigned int irq);
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extern void enable_percpu_irq(unsigned int irq, unsigned int type);
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/* The following three functions are for the core kernel use only. */
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#ifdef CONFIG_GENERIC_HARDIRQS
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@ -66,6 +66,7 @@ typedef void (*irq_preflow_handler_t)(struct irq_data *data);
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* IRQ_NO_BALANCING - Interrupt cannot be balanced (affinity set)
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* IRQ_MOVE_PCNTXT - Interrupt can be migrated from process context
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* IRQ_NESTED_TRHEAD - Interrupt nests into another thread
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* IRQ_PER_CPU_DEVID - Dev_id is a per-cpu variable
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*/
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enum {
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IRQ_TYPE_NONE = 0x00000000,
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@ -88,12 +89,13 @@ enum {
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IRQ_MOVE_PCNTXT = (1 << 14),
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IRQ_NESTED_THREAD = (1 << 15),
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IRQ_NOTHREAD = (1 << 16),
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IRQ_PER_CPU_DEVID = (1 << 17),
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};
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#define IRQF_MODIFY_MASK \
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(IRQ_TYPE_SENSE_MASK | IRQ_NOPROBE | IRQ_NOREQUEST | \
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IRQ_NOAUTOEN | IRQ_MOVE_PCNTXT | IRQ_LEVEL | IRQ_NO_BALANCING | \
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IRQ_PER_CPU | IRQ_NESTED_THREAD)
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IRQ_PER_CPU | IRQ_NESTED_THREAD | IRQ_NOTHREAD | IRQ_PER_CPU_DEVID)
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#define IRQ_NO_BALANCING_MASK (IRQ_PER_CPU | IRQ_NO_BALANCING)
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@ -336,12 +338,14 @@ struct irq_chip {
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* IRQCHIP_MASK_ON_SUSPEND: Mask non wake irqs in the suspend path
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* IRQCHIP_ONOFFLINE_ENABLED: Only call irq_on/off_line callbacks
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* when irq enabled
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* IRQCHIP_SKIP_SET_WAKE: Skip chip.irq_set_wake(), for this irq chip
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*/
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enum {
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IRQCHIP_SET_TYPE_MASKED = (1 << 0),
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IRQCHIP_EOI_IF_HANDLED = (1 << 1),
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IRQCHIP_MASK_ON_SUSPEND = (1 << 2),
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IRQCHIP_ONOFFLINE_ENABLED = (1 << 3),
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IRQCHIP_SKIP_SET_WAKE = (1 << 4),
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};
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/* This include will go away once we isolated irq_desc usage to core code */
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@ -365,6 +369,8 @@ enum {
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struct irqaction;
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extern int setup_irq(unsigned int irq, struct irqaction *new);
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extern void remove_irq(unsigned int irq, struct irqaction *act);
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extern int setup_percpu_irq(unsigned int irq, struct irqaction *new);
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extern void remove_percpu_irq(unsigned int irq, struct irqaction *act);
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extern void irq_cpu_online(void);
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extern void irq_cpu_offline(void);
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@ -392,6 +398,7 @@ extern void handle_edge_irq(unsigned int irq, struct irq_desc *desc);
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extern void handle_edge_eoi_irq(unsigned int irq, struct irq_desc *desc);
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extern void handle_simple_irq(unsigned int irq, struct irq_desc *desc);
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extern void handle_percpu_irq(unsigned int irq, struct irq_desc *desc);
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extern void handle_percpu_devid_irq(unsigned int irq, struct irq_desc *desc);
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extern void handle_bad_irq(unsigned int irq, struct irq_desc *desc);
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extern void handle_nested_irq(unsigned int irq);
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@ -420,6 +427,8 @@ static inline void irq_set_chip_and_handler(unsigned int irq, struct irq_chip *c
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irq_set_chip_and_handler_name(irq, chip, handle, NULL);
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}
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extern int irq_set_percpu_devid(unsigned int irq);
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extern void
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__irq_set_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
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const char *name);
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@ -481,6 +490,13 @@ static inline void irq_set_nested_thread(unsigned int irq, bool nest)
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irq_clear_status_flags(irq, IRQ_NESTED_THREAD);
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}
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static inline void irq_set_percpu_devid_flags(unsigned int irq)
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{
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irq_set_status_flags(irq,
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IRQ_NOAUTOEN | IRQ_PER_CPU | IRQ_NOTHREAD |
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IRQ_NOPROBE | IRQ_PER_CPU_DEVID);
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}
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/* Handle dynamic irq creation and destruction */
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extern unsigned int create_irq_nr(unsigned int irq_want, int node);
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extern int create_irq(void);
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@ -53,6 +53,7 @@ struct irq_desc {
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unsigned long last_unhandled; /* Aging timer for unhandled count */
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unsigned int irqs_unhandled;
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raw_spinlock_t lock;
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struct cpumask *percpu_enabled;
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#ifdef CONFIG_SMP
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const struct cpumask *affinity_hint;
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struct irq_affinity_notify *affinity_notify;
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@ -26,7 +26,7 @@
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int irq_set_chip(unsigned int irq, struct irq_chip *chip)
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{
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unsigned long flags;
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struct irq_desc *desc = irq_get_desc_lock(irq, &flags);
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struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0);
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if (!desc)
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return -EINVAL;
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@ -54,7 +54,7 @@ EXPORT_SYMBOL(irq_set_chip);
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int irq_set_irq_type(unsigned int irq, unsigned int type)
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{
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unsigned long flags;
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struct irq_desc *desc = irq_get_desc_buslock(irq, &flags);
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struct irq_desc *desc = irq_get_desc_buslock(irq, &flags, IRQ_GET_DESC_CHECK_GLOBAL);
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int ret = 0;
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if (!desc)
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@ -78,7 +78,7 @@ EXPORT_SYMBOL(irq_set_irq_type);
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int irq_set_handler_data(unsigned int irq, void *data)
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{
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unsigned long flags;
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struct irq_desc *desc = irq_get_desc_lock(irq, &flags);
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struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0);
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if (!desc)
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return -EINVAL;
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@ -98,7 +98,7 @@ EXPORT_SYMBOL(irq_set_handler_data);
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int irq_set_msi_desc(unsigned int irq, struct msi_desc *entry)
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{
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unsigned long flags;
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struct irq_desc *desc = irq_get_desc_lock(irq, &flags);
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struct irq_desc *desc = irq_get_desc_lock(irq, &flags, IRQ_GET_DESC_CHECK_GLOBAL);
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if (!desc)
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return -EINVAL;
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@ -119,7 +119,7 @@ int irq_set_msi_desc(unsigned int irq, struct msi_desc *entry)
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int irq_set_chip_data(unsigned int irq, void *data)
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{
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unsigned long flags;
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struct irq_desc *desc = irq_get_desc_lock(irq, &flags);
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struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0);
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if (!desc)
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return -EINVAL;
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@ -204,6 +204,24 @@ void irq_disable(struct irq_desc *desc)
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}
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}
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void irq_percpu_enable(struct irq_desc *desc, unsigned int cpu)
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{
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if (desc->irq_data.chip->irq_enable)
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desc->irq_data.chip->irq_enable(&desc->irq_data);
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else
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desc->irq_data.chip->irq_unmask(&desc->irq_data);
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cpumask_set_cpu(cpu, desc->percpu_enabled);
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}
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void irq_percpu_disable(struct irq_desc *desc, unsigned int cpu)
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{
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if (desc->irq_data.chip->irq_disable)
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desc->irq_data.chip->irq_disable(&desc->irq_data);
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else
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desc->irq_data.chip->irq_mask(&desc->irq_data);
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cpumask_clear_cpu(cpu, desc->percpu_enabled);
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}
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static inline void mask_ack_irq(struct irq_desc *desc)
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{
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if (desc->irq_data.chip->irq_mask_ack)
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@ -544,12 +562,44 @@ handle_percpu_irq(unsigned int irq, struct irq_desc *desc)
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chip->irq_eoi(&desc->irq_data);
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}
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/**
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* handle_percpu_devid_irq - Per CPU local irq handler with per cpu dev ids
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* @irq: the interrupt number
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* @desc: the interrupt description structure for this irq
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*
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* Per CPU interrupts on SMP machines without locking requirements. Same as
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* handle_percpu_irq() above but with the following extras:
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*
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* action->percpu_dev_id is a pointer to percpu variables which
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* contain the real device id for the cpu on which this handler is
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* called
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*/
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void handle_percpu_devid_irq(unsigned int irq, struct irq_desc *desc)
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{
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struct irq_chip *chip = irq_desc_get_chip(desc);
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struct irqaction *action = desc->action;
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void *dev_id = __this_cpu_ptr(action->percpu_dev_id);
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irqreturn_t res;
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kstat_incr_irqs_this_cpu(irq, desc);
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if (chip->irq_ack)
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chip->irq_ack(&desc->irq_data);
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trace_irq_handler_entry(irq, action);
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res = action->handler(irq, dev_id);
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trace_irq_handler_exit(irq, action, res);
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if (chip->irq_eoi)
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chip->irq_eoi(&desc->irq_data);
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}
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void
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__irq_set_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
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const char *name)
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{
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unsigned long flags;
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struct irq_desc *desc = irq_get_desc_buslock(irq, &flags);
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struct irq_desc *desc = irq_get_desc_buslock(irq, &flags, 0);
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if (!desc)
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return;
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@ -593,7 +643,7 @@ irq_set_chip_and_handler_name(unsigned int irq, struct irq_chip *chip,
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void irq_modify_status(unsigned int irq, unsigned long clr, unsigned long set)
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{
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unsigned long flags;
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struct irq_desc *desc = irq_get_desc_lock(irq, &flags);
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struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0);
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if (!desc)
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return;
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@ -71,6 +71,8 @@ extern int irq_startup(struct irq_desc *desc);
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extern void irq_shutdown(struct irq_desc *desc);
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extern void irq_enable(struct irq_desc *desc);
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extern void irq_disable(struct irq_desc *desc);
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extern void irq_percpu_enable(struct irq_desc *desc, unsigned int cpu);
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extern void irq_percpu_disable(struct irq_desc *desc, unsigned int cpu);
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extern void mask_irq(struct irq_desc *desc);
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extern void unmask_irq(struct irq_desc *desc);
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@ -114,14 +116,21 @@ static inline void chip_bus_sync_unlock(struct irq_desc *desc)
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desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data);
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}
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#define _IRQ_DESC_CHECK (1 << 0)
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#define _IRQ_DESC_PERCPU (1 << 1)
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#define IRQ_GET_DESC_CHECK_GLOBAL (_IRQ_DESC_CHECK)
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#define IRQ_GET_DESC_CHECK_PERCPU (_IRQ_DESC_CHECK | _IRQ_DESC_PERCPU)
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struct irq_desc *
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__irq_get_desc_lock(unsigned int irq, unsigned long *flags, bool bus);
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__irq_get_desc_lock(unsigned int irq, unsigned long *flags, bool bus,
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unsigned int check);
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void __irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags, bool bus);
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static inline struct irq_desc *
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irq_get_desc_buslock(unsigned int irq, unsigned long *flags)
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irq_get_desc_buslock(unsigned int irq, unsigned long *flags, unsigned int check)
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{
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return __irq_get_desc_lock(irq, flags, true);
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return __irq_get_desc_lock(irq, flags, true, check);
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}
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static inline void
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@ -131,9 +140,9 @@ irq_put_desc_busunlock(struct irq_desc *desc, unsigned long flags)
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}
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static inline struct irq_desc *
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irq_get_desc_lock(unsigned int irq, unsigned long *flags)
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irq_get_desc_lock(unsigned int irq, unsigned long *flags, unsigned int check)
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{
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return __irq_get_desc_lock(irq, flags, false);
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return __irq_get_desc_lock(irq, flags, false, check);
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}
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static inline void
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@ -424,11 +424,22 @@ unsigned int irq_get_next_irq(unsigned int offset)
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}
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struct irq_desc *
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__irq_get_desc_lock(unsigned int irq, unsigned long *flags, bool bus)
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__irq_get_desc_lock(unsigned int irq, unsigned long *flags, bool bus,
|
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unsigned int check)
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{
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struct irq_desc *desc = irq_to_desc(irq);
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if (desc) {
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if (check & _IRQ_DESC_CHECK) {
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if ((check & _IRQ_DESC_PERCPU) &&
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!irq_settings_is_per_cpu_devid(desc))
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return NULL;
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if (!(check & _IRQ_DESC_PERCPU) &&
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irq_settings_is_per_cpu_devid(desc))
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return NULL;
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}
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if (bus)
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chip_bus_lock(desc);
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raw_spin_lock_irqsave(&desc->lock, *flags);
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@ -443,6 +454,25 @@ void __irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags, bool bus)
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chip_bus_sync_unlock(desc);
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}
|
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int irq_set_percpu_devid(unsigned int irq)
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{
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struct irq_desc *desc = irq_to_desc(irq);
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if (!desc)
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return -EINVAL;
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if (desc->percpu_enabled)
|
||||
return -EINVAL;
|
||||
|
||||
desc->percpu_enabled = kzalloc(sizeof(*desc->percpu_enabled), GFP_KERNEL);
|
||||
|
||||
if (!desc->percpu_enabled)
|
||||
return -ENOMEM;
|
||||
|
||||
irq_set_percpu_devid_flags(irq);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* dynamic_irq_cleanup - cleanup a dynamically allocated irq
|
||||
* @irq: irq number to initialize
|
||||
|
||||
@ -195,7 +195,7 @@ int irq_set_affinity(unsigned int irq, const struct cpumask *mask)
|
||||
int irq_set_affinity_hint(unsigned int irq, const struct cpumask *m)
|
||||
{
|
||||
unsigned long flags;
|
||||
struct irq_desc *desc = irq_get_desc_lock(irq, &flags);
|
||||
struct irq_desc *desc = irq_get_desc_lock(irq, &flags, IRQ_GET_DESC_CHECK_GLOBAL);
|
||||
|
||||
if (!desc)
|
||||
return -EINVAL;
|
||||
@ -356,7 +356,7 @@ void __disable_irq(struct irq_desc *desc, unsigned int irq, bool suspend)
|
||||
static int __disable_irq_nosync(unsigned int irq)
|
||||
{
|
||||
unsigned long flags;
|
||||
struct irq_desc *desc = irq_get_desc_buslock(irq, &flags);
|
||||
struct irq_desc *desc = irq_get_desc_buslock(irq, &flags, IRQ_GET_DESC_CHECK_GLOBAL);
|
||||
|
||||
if (!desc)
|
||||
return -EINVAL;
|
||||
@ -448,7 +448,7 @@ void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume)
|
||||
void enable_irq(unsigned int irq)
|
||||
{
|
||||
unsigned long flags;
|
||||
struct irq_desc *desc = irq_get_desc_buslock(irq, &flags);
|
||||
struct irq_desc *desc = irq_get_desc_buslock(irq, &flags, IRQ_GET_DESC_CHECK_GLOBAL);
|
||||
|
||||
if (!desc)
|
||||
return;
|
||||
@ -467,6 +467,9 @@ static int set_irq_wake_real(unsigned int irq, unsigned int on)
|
||||
struct irq_desc *desc = irq_to_desc(irq);
|
||||
int ret = -ENXIO;
|
||||
|
||||
if (irq_desc_get_chip(desc)->flags & IRQCHIP_SKIP_SET_WAKE)
|
||||
return 0;
|
||||
|
||||
if (desc->irq_data.chip->irq_set_wake)
|
||||
ret = desc->irq_data.chip->irq_set_wake(&desc->irq_data, on);
|
||||
|
||||
@ -488,7 +491,7 @@ static int set_irq_wake_real(unsigned int irq, unsigned int on)
|
||||
int irq_set_irq_wake(unsigned int irq, unsigned int on)
|
||||
{
|
||||
unsigned long flags;
|
||||
struct irq_desc *desc = irq_get_desc_buslock(irq, &flags);
|
||||
struct irq_desc *desc = irq_get_desc_buslock(irq, &flags, IRQ_GET_DESC_CHECK_GLOBAL);
|
||||
int ret = 0;
|
||||
|
||||
if (!desc)
|
||||
@ -529,7 +532,7 @@ EXPORT_SYMBOL(irq_set_irq_wake);
|
||||
int can_request_irq(unsigned int irq, unsigned long irqflags)
|
||||
{
|
||||
unsigned long flags;
|
||||
struct irq_desc *desc = irq_get_desc_lock(irq, &flags);
|
||||
struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0);
|
||||
int canrequest = 0;
|
||||
|
||||
if (!desc)
|
||||
@ -1118,6 +1121,8 @@ int setup_irq(unsigned int irq, struct irqaction *act)
|
||||
int retval;
|
||||
struct irq_desc *desc = irq_to_desc(irq);
|
||||
|
||||
if (WARN_ON(irq_settings_is_per_cpu_devid(desc)))
|
||||
return -EINVAL;
|
||||
chip_bus_lock(desc);
|
||||
retval = __setup_irq(irq, desc, act);
|
||||
chip_bus_sync_unlock(desc);
|
||||
@ -1126,7 +1131,7 @@ int setup_irq(unsigned int irq, struct irqaction *act)
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(setup_irq);
|
||||
|
||||
/*
|
||||
/*
|
||||
* Internal function to unregister an irqaction - used to free
|
||||
* regular and special interrupts that are part of the architecture.
|
||||
*/
|
||||
@ -1224,7 +1229,10 @@ static struct irqaction *__free_irq(unsigned int irq, void *dev_id)
|
||||
*/
|
||||
void remove_irq(unsigned int irq, struct irqaction *act)
|
||||
{
|
||||
__free_irq(irq, act->dev_id);
|
||||
struct irq_desc *desc = irq_to_desc(irq);
|
||||
|
||||
if (desc && !WARN_ON(irq_settings_is_per_cpu_devid(desc)))
|
||||
__free_irq(irq, act->dev_id);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(remove_irq);
|
||||
|
||||
@ -1246,7 +1254,7 @@ void free_irq(unsigned int irq, void *dev_id)
|
||||
{
|
||||
struct irq_desc *desc = irq_to_desc(irq);
|
||||
|
||||
if (!desc)
|
||||
if (!desc || WARN_ON(irq_settings_is_per_cpu_devid(desc)))
|
||||
return;
|
||||
|
||||
#ifdef CONFIG_SMP
|
||||
@ -1324,7 +1332,8 @@ int request_threaded_irq(unsigned int irq, irq_handler_t handler,
|
||||
if (!desc)
|
||||
return -EINVAL;
|
||||
|
||||
if (!irq_settings_can_request(desc))
|
||||
if (!irq_settings_can_request(desc) ||
|
||||
WARN_ON(irq_settings_is_per_cpu_devid(desc)))
|
||||
return -EINVAL;
|
||||
|
||||
if (!handler) {
|
||||
@ -1409,3 +1418,194 @@ int request_any_context_irq(unsigned int irq, irq_handler_t handler,
|
||||
return !ret ? IRQC_IS_HARDIRQ : ret;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(request_any_context_irq);
|
||||
|
||||
void enable_percpu_irq(unsigned int irq, unsigned int type)
|
||||
{
|
||||
unsigned int cpu = smp_processor_id();
|
||||
unsigned long flags;
|
||||
struct irq_desc *desc = irq_get_desc_lock(irq, &flags, IRQ_GET_DESC_CHECK_PERCPU);
|
||||
|
||||
if (!desc)
|
||||
return;
|
||||
|
||||
type &= IRQ_TYPE_SENSE_MASK;
|
||||
if (type != IRQ_TYPE_NONE) {
|
||||
int ret;
|
||||
|
||||
ret = __irq_set_trigger(desc, irq, type);
|
||||
|
||||
if (ret) {
|
||||
WARN(1, "failed to set type for IRQ%d\n", irq);
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
|
||||
irq_percpu_enable(desc, cpu);
|
||||
out:
|
||||
irq_put_desc_unlock(desc, flags);
|
||||
}
|
||||
|
||||
void disable_percpu_irq(unsigned int irq)
|
||||
{
|
||||
unsigned int cpu = smp_processor_id();
|
||||
unsigned long flags;
|
||||
struct irq_desc *desc = irq_get_desc_lock(irq, &flags, IRQ_GET_DESC_CHECK_PERCPU);
|
||||
|
||||
if (!desc)
|
||||
return;
|
||||
|
||||
irq_percpu_disable(desc, cpu);
|
||||
irq_put_desc_unlock(desc, flags);
|
||||
}
|
||||
|
||||
/*
|
||||
* Internal function to unregister a percpu irqaction.
|
||||
*/
|
||||
static struct irqaction *__free_percpu_irq(unsigned int irq, void __percpu *dev_id)
|
||||
{
|
||||
struct irq_desc *desc = irq_to_desc(irq);
|
||||
struct irqaction *action;
|
||||
unsigned long flags;
|
||||
|
||||
WARN(in_interrupt(), "Trying to free IRQ %d from IRQ context!\n", irq);
|
||||
|
||||
if (!desc)
|
||||
return NULL;
|
||||
|
||||
raw_spin_lock_irqsave(&desc->lock, flags);
|
||||
|
||||
action = desc->action;
|
||||
if (!action || action->percpu_dev_id != dev_id) {
|
||||
WARN(1, "Trying to free already-free IRQ %d\n", irq);
|
||||
goto bad;
|
||||
}
|
||||
|
||||
if (!cpumask_empty(desc->percpu_enabled)) {
|
||||
WARN(1, "percpu IRQ %d still enabled on CPU%d!\n",
|
||||
irq, cpumask_first(desc->percpu_enabled));
|
||||
goto bad;
|
||||
}
|
||||
|
||||
/* Found it - now remove it from the list of entries: */
|
||||
desc->action = NULL;
|
||||
|
||||
raw_spin_unlock_irqrestore(&desc->lock, flags);
|
||||
|
||||
unregister_handler_proc(irq, action);
|
||||
|
||||
module_put(desc->owner);
|
||||
return action;
|
||||
|
||||
bad:
|
||||
raw_spin_unlock_irqrestore(&desc->lock, flags);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/**
|
||||
* remove_percpu_irq - free a per-cpu interrupt
|
||||
* @irq: Interrupt line to free
|
||||
* @act: irqaction for the interrupt
|
||||
*
|
||||
* Used to remove interrupts statically setup by the early boot process.
|
||||
*/
|
||||
void remove_percpu_irq(unsigned int irq, struct irqaction *act)
|
||||
{
|
||||
struct irq_desc *desc = irq_to_desc(irq);
|
||||
|
||||
if (desc && irq_settings_is_per_cpu_devid(desc))
|
||||
__free_percpu_irq(irq, act->percpu_dev_id);
|
||||
}
|
||||
|
||||
/**
|
||||
* free_percpu_irq - free an interrupt allocated with request_percpu_irq
|
||||
* @irq: Interrupt line to free
|
||||
* @dev_id: Device identity to free
|
||||
*
|
||||
* Remove a percpu interrupt handler. The handler is removed, but
|
||||
* the interrupt line is not disabled. This must be done on each
|
||||
* CPU before calling this function. The function does not return
|
||||
* until any executing interrupts for this IRQ have completed.
|
||||
*
|
||||
* This function must not be called from interrupt context.
|
||||
*/
|
||||
void free_percpu_irq(unsigned int irq, void __percpu *dev_id)
|
||||
{
|
||||
struct irq_desc *desc = irq_to_desc(irq);
|
||||
|
||||
if (!desc || !irq_settings_is_per_cpu_devid(desc))
|
||||
return;
|
||||
|
||||
chip_bus_lock(desc);
|
||||
kfree(__free_percpu_irq(irq, dev_id));
|
||||
chip_bus_sync_unlock(desc);
|
||||
}
|
||||
|
||||
/**
|
||||
* setup_percpu_irq - setup a per-cpu interrupt
|
||||
* @irq: Interrupt line to setup
|
||||
* @act: irqaction for the interrupt
|
||||
*
|
||||
* Used to statically setup per-cpu interrupts in the early boot process.
|
||||
*/
|
||||
int setup_percpu_irq(unsigned int irq, struct irqaction *act)
|
||||
{
|
||||
struct irq_desc *desc = irq_to_desc(irq);
|
||||
int retval;
|
||||
|
||||
if (!desc || !irq_settings_is_per_cpu_devid(desc))
|
||||
return -EINVAL;
|
||||
chip_bus_lock(desc);
|
||||
retval = __setup_irq(irq, desc, act);
|
||||
chip_bus_sync_unlock(desc);
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
/**
|
||||
* request_percpu_irq - allocate a percpu interrupt line
|
||||
* @irq: Interrupt line to allocate
|
||||
* @handler: Function to be called when the IRQ occurs.
|
||||
* @devname: An ascii name for the claiming device
|
||||
* @dev_id: A percpu cookie passed back to the handler function
|
||||
*
|
||||
* This call allocates interrupt resources, but doesn't
|
||||
* automatically enable the interrupt. It has to be done on each
|
||||
* CPU using enable_percpu_irq().
|
||||
*
|
||||
* Dev_id must be globally unique. It is a per-cpu variable, and
|
||||
* the handler gets called with the interrupted CPU's instance of
|
||||
* that variable.
|
||||
*/
|
||||
int request_percpu_irq(unsigned int irq, irq_handler_t handler,
|
||||
const char *devname, void __percpu *dev_id)
|
||||
{
|
||||
struct irqaction *action;
|
||||
struct irq_desc *desc;
|
||||
int retval;
|
||||
|
||||
if (!dev_id)
|
||||
return -EINVAL;
|
||||
|
||||
desc = irq_to_desc(irq);
|
||||
if (!desc || !irq_settings_can_request(desc) ||
|
||||
!irq_settings_is_per_cpu_devid(desc))
|
||||
return -EINVAL;
|
||||
|
||||
action = kzalloc(sizeof(struct irqaction), GFP_KERNEL);
|
||||
if (!action)
|
||||
return -ENOMEM;
|
||||
|
||||
action->handler = handler;
|
||||
action->flags = IRQF_PERCPU;
|
||||
action->name = devname;
|
||||
action->percpu_dev_id = dev_id;
|
||||
|
||||
chip_bus_lock(desc);
|
||||
retval = __setup_irq(irq, desc, action);
|
||||
chip_bus_sync_unlock(desc);
|
||||
|
||||
if (retval)
|
||||
kfree(action);
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
@ -9,6 +9,7 @@
|
||||
#include <linux/irq.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/syscore_ops.h>
|
||||
|
||||
#include "internals.h"
|
||||
|
||||
@ -39,25 +40,58 @@ void suspend_device_irqs(void)
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(suspend_device_irqs);
|
||||
|
||||
/**
|
||||
* resume_device_irqs - enable interrupt lines disabled by suspend_device_irqs()
|
||||
*
|
||||
* Enable all interrupt lines previously disabled by suspend_device_irqs() that
|
||||
* have the IRQS_SUSPENDED flag set.
|
||||
*/
|
||||
void resume_device_irqs(void)
|
||||
static void resume_irqs(bool want_early)
|
||||
{
|
||||
struct irq_desc *desc;
|
||||
int irq;
|
||||
|
||||
for_each_irq_desc(irq, desc) {
|
||||
unsigned long flags;
|
||||
bool is_early = desc->action &&
|
||||
desc->action->flags & IRQF_EARLY_RESUME;
|
||||
|
||||
if (is_early != want_early)
|
||||
continue;
|
||||
|
||||
raw_spin_lock_irqsave(&desc->lock, flags);
|
||||
__enable_irq(desc, irq, true);
|
||||
raw_spin_unlock_irqrestore(&desc->lock, flags);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* irq_pm_syscore_ops - enable interrupt lines early
|
||||
*
|
||||
* Enable all interrupt lines with %IRQF_EARLY_RESUME set.
|
||||
*/
|
||||
static void irq_pm_syscore_resume(void)
|
||||
{
|
||||
resume_irqs(true);
|
||||
}
|
||||
|
||||
static struct syscore_ops irq_pm_syscore_ops = {
|
||||
.resume = irq_pm_syscore_resume,
|
||||
};
|
||||
|
||||
static int __init irq_pm_init_ops(void)
|
||||
{
|
||||
register_syscore_ops(&irq_pm_syscore_ops);
|
||||
return 0;
|
||||
}
|
||||
|
||||
device_initcall(irq_pm_init_ops);
|
||||
|
||||
/**
|
||||
* resume_device_irqs - enable interrupt lines disabled by suspend_device_irqs()
|
||||
*
|
||||
* Enable all non-%IRQF_EARLY_RESUME interrupt lines previously
|
||||
* disabled by suspend_device_irqs() that have the IRQS_SUSPENDED flag
|
||||
* set as well as those with %IRQF_FORCE_RESUME.
|
||||
*/
|
||||
void resume_device_irqs(void)
|
||||
{
|
||||
resume_irqs(false);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(resume_device_irqs);
|
||||
|
||||
/**
|
||||
|
||||
@ -13,6 +13,7 @@ enum {
|
||||
_IRQ_MOVE_PCNTXT = IRQ_MOVE_PCNTXT,
|
||||
_IRQ_NO_BALANCING = IRQ_NO_BALANCING,
|
||||
_IRQ_NESTED_THREAD = IRQ_NESTED_THREAD,
|
||||
_IRQ_PER_CPU_DEVID = IRQ_PER_CPU_DEVID,
|
||||
_IRQF_MODIFY_MASK = IRQF_MODIFY_MASK,
|
||||
};
|
||||
|
||||
@ -24,6 +25,7 @@ enum {
|
||||
#define IRQ_NOTHREAD GOT_YOU_MORON
|
||||
#define IRQ_NOAUTOEN GOT_YOU_MORON
|
||||
#define IRQ_NESTED_THREAD GOT_YOU_MORON
|
||||
#define IRQ_PER_CPU_DEVID GOT_YOU_MORON
|
||||
#undef IRQF_MODIFY_MASK
|
||||
#define IRQF_MODIFY_MASK GOT_YOU_MORON
|
||||
|
||||
@ -39,6 +41,11 @@ static inline bool irq_settings_is_per_cpu(struct irq_desc *desc)
|
||||
return desc->status_use_accessors & _IRQ_PER_CPU;
|
||||
}
|
||||
|
||||
static inline bool irq_settings_is_per_cpu_devid(struct irq_desc *desc)
|
||||
{
|
||||
return desc->status_use_accessors & _IRQ_PER_CPU_DEVID;
|
||||
}
|
||||
|
||||
static inline void irq_settings_set_per_cpu(struct irq_desc *desc)
|
||||
{
|
||||
desc->status_use_accessors |= _IRQ_PER_CPU;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user