author | Florian Westphal <fw@strlen.de> |
Sun, 11 Jan 2009 20:20:11 +0100 | |
changeset 0 | aa628870c1d3 |
child 2 | d1f6d8b6f81c |
permissions | -rw-r--r-- |
0
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Port of Linux 2.6.28 for use with network simulation cradle.
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#ifndef _LINUX_IRQ_H |
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#define _LINUX_IRQ_H |
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|
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/* |
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* Please do not include this file in generic code. There is currently |
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* no requirement for any architecture to implement anything held |
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* within this file. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* |
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* Thanks. --rmk |
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Port of Linux 2.6.28 for use with network simulation cradle.
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*/ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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#include <linux/smp.h> |
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|
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#ifndef CONFIG_S390 |
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|
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#include <linux/linkage.h> |
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#include <linux/cache.h> |
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#include <linux/spinlock.h> |
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#include <linux/cpumask.h> |
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#include <linux/irqreturn.h> |
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#include <linux/irqnr.h> |
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#include <linux/errno.h> |
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|
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#include <asm/irq.h> |
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#include <asm/ptrace.h> |
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#include <asm/irq_regs.h> |
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|
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struct irq_desc; |
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typedef void (*irq_flow_handler_t)(unsigned int irq, |
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struct irq_desc *desc); |
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/* |
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* IRQ line status. |
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* |
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* Bits 0-7 are reserved for the IRQF_* bits in linux/interrupt.h |
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* |
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* IRQ types |
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*/ |
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#define IRQ_TYPE_NONE 0x00000000 /* Default, unspecified type */ |
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#define IRQ_TYPE_EDGE_RISING 0x00000001 /* Edge rising type */ |
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#define IRQ_TYPE_EDGE_FALLING 0x00000002 /* Edge falling type */ |
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#define IRQ_TYPE_EDGE_BOTH (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING) |
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#define IRQ_TYPE_LEVEL_HIGH 0x00000004 /* Level high type */ |
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#define IRQ_TYPE_LEVEL_LOW 0x00000008 /* Level low type */ |
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#define IRQ_TYPE_SENSE_MASK 0x0000000f /* Mask of the above */ |
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#define IRQ_TYPE_PROBE 0x00000010 /* Probing in progress */ |
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|
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/* Internal flags */ |
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#define IRQ_INPROGRESS 0x00000100 /* IRQ handler active - do not enter! */ |
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#define IRQ_DISABLED 0x00000200 /* IRQ disabled - do not enter! */ |
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#define IRQ_PENDING 0x00000400 /* IRQ pending - replay on enable */ |
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#define IRQ_REPLAY 0x00000800 /* IRQ has been replayed but not acked yet */ |
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#define IRQ_AUTODETECT 0x00001000 /* IRQ is being autodetected */ |
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#define IRQ_WAITING 0x00002000 /* IRQ not yet seen - for autodetection */ |
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#define IRQ_LEVEL 0x00004000 /* IRQ level triggered */ |
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#define IRQ_MASKED 0x00008000 /* IRQ masked - shouldn't be seen again */ |
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#define IRQ_PER_CPU 0x00010000 /* IRQ is per CPU */ |
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#define IRQ_NOPROBE 0x00020000 /* IRQ is not valid for probing */ |
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#define IRQ_NOREQUEST 0x00040000 /* IRQ cannot be requested */ |
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#define IRQ_NOAUTOEN 0x00080000 /* IRQ will not be enabled on request irq */ |
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#define IRQ_WAKEUP 0x00100000 /* IRQ triggers system wakeup */ |
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#define IRQ_MOVE_PENDING 0x00200000 /* need to re-target IRQ destination */ |
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#define IRQ_NO_BALANCING 0x00400000 /* IRQ is excluded from balancing */ |
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#define IRQ_SPURIOUS_DISABLED 0x00800000 /* IRQ was disabled by the spurious trap */ |
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#define IRQ_MOVE_PCNTXT 0x01000000 /* IRQ migration from process context */ |
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#define IRQ_AFFINITY_SET 0x02000000 /* IRQ affinity was set from userspace*/ |
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|
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#ifdef CONFIG_IRQ_PER_CPU |
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# define CHECK_IRQ_PER_CPU(var) ((var) & IRQ_PER_CPU) |
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# define IRQ_NO_BALANCING_MASK (IRQ_PER_CPU | IRQ_NO_BALANCING) |
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#else |
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# define CHECK_IRQ_PER_CPU(var) 0 |
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# define IRQ_NO_BALANCING_MASK IRQ_NO_BALANCING |
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#endif |
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|
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struct proc_dir_entry; |
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struct msi_desc; |
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|
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/** |
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* struct irq_chip - hardware interrupt chip descriptor |
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* |
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* @name: name for /proc/interrupts |
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* @startup: start up the interrupt (defaults to ->enable if NULL) |
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* @shutdown: shut down the interrupt (defaults to ->disable if NULL) |
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* @enable: enable the interrupt (defaults to chip->unmask if NULL) |
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* @disable: disable the interrupt (defaults to chip->mask if NULL) |
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* @ack: start of a new interrupt |
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* @mask: mask an interrupt source |
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* @mask_ack: ack and mask an interrupt source |
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* @unmask: unmask an interrupt source |
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* @eoi: end of interrupt - chip level |
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* @end: end of interrupt - flow level |
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* @set_affinity: set the CPU affinity on SMP machines |
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* @retrigger: resend an IRQ to the CPU |
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* @set_type: set the flow type (IRQ_TYPE_LEVEL/etc.) of an IRQ |
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* @set_wake: enable/disable power-management wake-on of an IRQ |
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* |
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* @release: release function solely used by UML |
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* @typename: obsoleted by name, kept as migration helper |
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*/ |
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struct irq_chip { |
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const char *name; |
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unsigned int (*startup)(unsigned int irq); |
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void (*shutdown)(unsigned int irq); |
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void (*enable)(unsigned int irq); |
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void (*disable)(unsigned int irq); |
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|
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void (*ack)(unsigned int irq); |
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void (*mask)(unsigned int irq); |
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void (*mask_ack)(unsigned int irq); |
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void (*unmask)(unsigned int irq); |
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void (*eoi)(unsigned int irq); |
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|
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void (*end)(unsigned int irq); |
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void (*set_affinity)(unsigned int irq, cpumask_t dest); |
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int (*retrigger)(unsigned int irq); |
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int (*set_type)(unsigned int irq, unsigned int flow_type); |
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int (*set_wake)(unsigned int irq, unsigned int on); |
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|
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/* Currently used only by UML, might disappear one day.*/ |
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#ifdef CONFIG_IRQ_RELEASE_METHOD |
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void (*release)(unsigned int irq, void *dev_id); |
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#endif |
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/* |
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* For compatibility, ->typename is copied into ->name. |
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* Will disappear. |
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*/ |
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const char *typename; |
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}; |
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|
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/** |
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* struct irq_desc - interrupt descriptor |
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* @irq: interrupt number for this descriptor |
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* @handle_irq: highlevel irq-events handler [if NULL, __do_IRQ()] |
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* @chip: low level interrupt hardware access |
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* @msi_desc: MSI descriptor |
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* @handler_data: per-IRQ data for the irq_chip methods |
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* @chip_data: platform-specific per-chip private data for the chip |
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* methods, to allow shared chip implementations |
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* @action: the irq action chain |
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* @status: status information |
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* @depth: disable-depth, for nested irq_disable() calls |
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* @wake_depth: enable depth, for multiple set_irq_wake() callers |
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* @irq_count: stats field to detect stalled irqs |
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* @irqs_unhandled: stats field for spurious unhandled interrupts |
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* @last_unhandled: aging timer for unhandled count |
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* @lock: locking for SMP |
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* @affinity: IRQ affinity on SMP |
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* @cpu: cpu index useful for balancing |
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* @pending_mask: pending rebalanced interrupts |
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* @dir: /proc/irq/ procfs entry |
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* @name: flow handler name for /proc/interrupts output |
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154 |
*/ |
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struct irq_desc { |
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unsigned int irq; |
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irq_flow_handler_t handle_irq; |
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struct irq_chip *chip; |
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struct msi_desc *msi_desc; |
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void *handler_data; |
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void *chip_data; |
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struct irqaction *action; /* IRQ action list */ |
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unsigned int status; /* IRQ status */ |
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164 |
|
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unsigned int depth; /* nested irq disables */ |
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166 |
unsigned int wake_depth; /* nested wake enables */ |
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unsigned int irq_count; /* For detecting broken IRQs */ |
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168 |
unsigned int irqs_unhandled; |
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unsigned long last_unhandled; /* Aging timer for unhandled count */ |
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170 |
spinlock_t lock; |
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171 |
#ifdef CONFIG_SMP |
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cpumask_t affinity; |
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unsigned int cpu; |
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174 |
#endif |
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#ifdef CONFIG_GENERIC_PENDING_IRQ |
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176 |
cpumask_t pending_mask; |
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177 |
#endif |
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178 |
#ifdef CONFIG_PROC_FS |
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179 |
struct proc_dir_entry *dir; |
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180 |
#endif |
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181 |
const char *name; |
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182 |
} ____cacheline_internodealigned_in_smp; |
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183 |
|
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184 |
|
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185 |
extern struct irq_desc irq_desc[NR_IRQS]; |
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186 |
|
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187 |
static inline struct irq_desc *irq_to_desc(unsigned int irq) |
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188 |
{ |
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189 |
return (irq < nr_irqs) ? irq_desc + irq : NULL; |
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190 |
} |
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191 |
|
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192 |
/* |
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193 |
* Migration helpers for obsolete names, they will go away: |
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194 |
*/ |
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195 |
#define hw_interrupt_type irq_chip |
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196 |
typedef struct irq_chip hw_irq_controller; |
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197 |
#define no_irq_type no_irq_chip |
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typedef struct irq_desc irq_desc_t; |
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199 |
|
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200 |
/* |
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201 |
* Pick up the arch-dependent methods: |
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202 |
*/ |
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203 |
#include <asm/hw_irq.h> |
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extern int setup_irq(unsigned int irq, struct irqaction *new); |
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|
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207 |
#ifdef CONFIG_GENERIC_HARDIRQS |
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|
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209 |
#ifdef CONFIG_SMP |
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|
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#ifdef CONFIG_GENERIC_PENDING_IRQ |
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|
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void move_native_irq(int irq); |
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void move_masked_irq(int irq); |
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|
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#else /* CONFIG_GENERIC_PENDING_IRQ */ |
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|
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static inline void move_irq(int irq) |
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{ |
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} |
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static inline void move_native_irq(int irq) |
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{ |
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} |
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static inline void move_masked_irq(int irq) |
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{ |
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} |
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#endif /* CONFIG_GENERIC_PENDING_IRQ */ |
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#else /* CONFIG_SMP */ |
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#define move_native_irq(x) |
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#define move_masked_irq(x) |
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#endif /* CONFIG_SMP */ |
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extern int no_irq_affinity; |
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static inline int irq_balancing_disabled(unsigned int irq) |
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{ |
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struct irq_desc *desc; |
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desc = irq_to_desc(irq); |
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return desc->status & IRQ_NO_BALANCING_MASK; |
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} |
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/* Handle irq action chains: */ |
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extern int handle_IRQ_event(unsigned int irq, struct irqaction *action); |
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/* |
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* Built-in IRQ handlers for various IRQ types, |
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* callable via desc->chip->handle_irq() |
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*/ |
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extern void handle_level_irq(unsigned int irq, struct irq_desc *desc); |
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extern void handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc); |
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extern void handle_edge_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_bad_irq(unsigned int irq, struct irq_desc *desc); |
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|
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/* |
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* Monolithic do_IRQ implementation. |
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*/ |
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#ifndef CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ |
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extern unsigned int __do_IRQ(unsigned int irq); |
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#endif |
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|
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/* |
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* Architectures call this to let the generic IRQ layer |
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* handle an interrupt. If the descriptor is attached to an |
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* irqchip-style controller then we call the ->handle_irq() handler, |
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* and it calls __do_IRQ() if it's attached to an irqtype-style controller. |
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*/ |
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static inline void generic_handle_irq_desc(unsigned int irq, struct irq_desc *desc) |
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{ |
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#ifdef CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ |
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desc->handle_irq(irq, desc); |
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#else |
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if (likely(desc->handle_irq)) |
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desc->handle_irq(irq, desc); |
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else |
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__do_IRQ(irq); |
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#endif |
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286 |
} |
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|
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static inline void generic_handle_irq(unsigned int irq) |
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{ |
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generic_handle_irq_desc(irq, irq_to_desc(irq)); |
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291 |
} |
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|
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293 |
/* Handling of unhandled and spurious interrupts: */ |
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extern void note_interrupt(unsigned int irq, struct irq_desc *desc, |
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int action_ret); |
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296 |
|
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/* Resending of interrupts :*/ |
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void check_irq_resend(struct irq_desc *desc, unsigned int irq); |
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299 |
|
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300 |
/* Enable/disable irq debugging output: */ |
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301 |
extern int noirqdebug_setup(char *str); |
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302 |
|
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|
303 |
/* Checks whether the interrupt can be requested by request_irq(): */ |
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304 |
extern int can_request_irq(unsigned int irq, unsigned long irqflags); |
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|
305 |
|
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306 |
/* Dummy irq-chip implementations: */ |
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307 |
extern struct irq_chip no_irq_chip; |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
308 |
extern struct irq_chip dummy_irq_chip; |
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309 |
|
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310 |
extern void |
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Port of Linux 2.6.28 for use with network simulation cradle.
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311 |
set_irq_chip_and_handler(unsigned int irq, struct irq_chip *chip, |
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312 |
irq_flow_handler_t handle); |
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313 |
extern void |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
314 |
set_irq_chip_and_handler_name(unsigned int irq, struct irq_chip *chip, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
315 |
irq_flow_handler_t handle, const char *name); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
316 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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317 |
extern void |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
318 |
__set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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319 |
const char *name); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
320 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
321 |
/* caller has locked the irq_desc and both params are valid */ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
322 |
static inline void __set_irq_handler_unlocked(int irq, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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|
323 |
irq_flow_handler_t handler) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
324 |
{ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
325 |
struct irq_desc *desc; |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
326 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
327 |
desc = irq_to_desc(irq); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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|
328 |
desc->handle_irq = handler; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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|
329 |
} |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
330 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
331 |
/* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
332 |
* Set a highlevel flow handler for a given IRQ: |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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|
333 |
*/ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
334 |
static inline void |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
335 |
set_irq_handler(unsigned int irq, irq_flow_handler_t handle) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
336 |
{ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
337 |
__set_irq_handler(irq, handle, 0, NULL); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
338 |
} |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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|
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/* |
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* Set a highlevel chained flow handler for a given IRQ. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* (a chained handler is automatically enabled and set to |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* IRQ_NOREQUEST and IRQ_NOPROBE) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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*/ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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static inline void |
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Port of Linux 2.6.28 for use with network simulation cradle.
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set_irq_chained_handler(unsigned int irq, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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irq_flow_handler_t handle) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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{ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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__set_irq_handler(irq, handle, 1, NULL); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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} |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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extern void set_irq_noprobe(unsigned int irq); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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extern void set_irq_probe(unsigned int irq); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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/* Handle dynamic irq creation and destruction */ |
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extern unsigned int create_irq_nr(unsigned int irq_want); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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extern int create_irq(void); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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extern void destroy_irq(unsigned int irq); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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/* Test to see if a driver has successfully requested an irq */ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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static inline int irq_has_action(unsigned int irq) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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{ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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struct irq_desc *desc = irq_to_desc(irq); |
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return desc->action != NULL; |
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Port of Linux 2.6.28 for use with network simulation cradle.
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} |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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/* Dynamic irq helper functions */ |
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extern void dynamic_irq_init(unsigned int irq); |
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extern void dynamic_irq_cleanup(unsigned int irq); |
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|
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/* Set/get chip/data for an IRQ: */ |
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extern int set_irq_chip(unsigned int irq, struct irq_chip *chip); |
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extern int set_irq_data(unsigned int irq, void *data); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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extern int set_irq_chip_data(unsigned int irq, void *data); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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extern int set_irq_type(unsigned int irq, unsigned int type); |
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extern int set_irq_msi(unsigned int irq, struct msi_desc *entry); |
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|
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#define get_irq_chip(irq) (irq_to_desc(irq)->chip) |
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#define get_irq_chip_data(irq) (irq_to_desc(irq)->chip_data) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#define get_irq_data(irq) (irq_to_desc(irq)->handler_data) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#define get_irq_msi(irq) (irq_to_desc(irq)->msi_desc) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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#endif /* CONFIG_GENERIC_HARDIRQS */ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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#endif /* !CONFIG_S390 */ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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386 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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#endif /* _LINUX_IRQ_H */ |