Ingo Molnar | 06fcb0c | 2006-06-29 02:24:40 -0700 | [diff] [blame] | 1 | #ifndef _LINUX_IRQ_H |
| 2 | #define _LINUX_IRQ_H |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | |
| 4 | /* |
| 5 | * Please do not include this file in generic code. There is currently |
| 6 | * no requirement for any architecture to implement anything held |
| 7 | * within this file. |
| 8 | * |
| 9 | * Thanks. --rmk |
| 10 | */ |
| 11 | |
Adrian Bunk | 23f9b31 | 2005-12-21 02:27:50 +0100 | [diff] [blame] | 12 | #include <linux/smp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | |
Ingo Molnar | 06fcb0c | 2006-06-29 02:24:40 -0700 | [diff] [blame] | 14 | #ifndef CONFIG_S390 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | |
| 16 | #include <linux/linkage.h> |
| 17 | #include <linux/cache.h> |
| 18 | #include <linux/spinlock.h> |
| 19 | #include <linux/cpumask.h> |
Ralf Baechle | 503e576 | 2009-03-29 12:59:50 +0200 | [diff] [blame] | 20 | #include <linux/gfp.h> |
Jan Beulich | 908dcec | 2006-06-23 02:06:00 -0700 | [diff] [blame] | 21 | #include <linux/irqreturn.h> |
Thomas Gleixner | dd3a1db | 2008-10-16 18:20:58 +0200 | [diff] [blame] | 22 | #include <linux/irqnr.h> |
David Howells | 77904fd | 2007-02-28 20:13:26 -0800 | [diff] [blame] | 23 | #include <linux/errno.h> |
Ralf Baechle | 503e576 | 2009-03-29 12:59:50 +0200 | [diff] [blame] | 24 | #include <linux/topology.h> |
Thomas Gleixner | 3aa551c | 2009-03-23 18:28:15 +0100 | [diff] [blame] | 25 | #include <linux/wait.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | |
| 27 | #include <asm/irq.h> |
| 28 | #include <asm/ptrace.h> |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 29 | #include <asm/irq_regs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | |
David Howells | 57a58a9 | 2006-10-05 13:06:34 +0100 | [diff] [blame] | 31 | struct irq_desc; |
Harvey Harrison | ec70158 | 2008-02-08 04:19:55 -0800 | [diff] [blame] | 32 | typedef void (*irq_flow_handler_t)(unsigned int irq, |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 33 | struct irq_desc *desc); |
David Howells | 57a58a9 | 2006-10-05 13:06:34 +0100 | [diff] [blame] | 34 | |
| 35 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | /* |
| 37 | * IRQ line status. |
Thomas Gleixner | 6e21361 | 2006-07-01 19:29:03 -0700 | [diff] [blame] | 38 | * |
Thomas Gleixner | 950f442 | 2007-02-16 01:27:24 -0800 | [diff] [blame] | 39 | * Bits 0-7 are reserved for the IRQF_* bits in linux/interrupt.h |
Thomas Gleixner | 6e21361 | 2006-07-01 19:29:03 -0700 | [diff] [blame] | 40 | * |
| 41 | * IRQ types |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | */ |
Thomas Gleixner | 6e21361 | 2006-07-01 19:29:03 -0700 | [diff] [blame] | 43 | #define IRQ_TYPE_NONE 0x00000000 /* Default, unspecified type */ |
| 44 | #define IRQ_TYPE_EDGE_RISING 0x00000001 /* Edge rising type */ |
| 45 | #define IRQ_TYPE_EDGE_FALLING 0x00000002 /* Edge falling type */ |
| 46 | #define IRQ_TYPE_EDGE_BOTH (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING) |
| 47 | #define IRQ_TYPE_LEVEL_HIGH 0x00000004 /* Level high type */ |
| 48 | #define IRQ_TYPE_LEVEL_LOW 0x00000008 /* Level low type */ |
| 49 | #define IRQ_TYPE_SENSE_MASK 0x0000000f /* Mask of the above */ |
| 50 | #define IRQ_TYPE_PROBE 0x00000010 /* Probing in progress */ |
| 51 | |
| 52 | /* Internal flags */ |
Thomas Gleixner | 950f442 | 2007-02-16 01:27:24 -0800 | [diff] [blame] | 53 | #define IRQ_INPROGRESS 0x00000100 /* IRQ handler active - do not enter! */ |
| 54 | #define IRQ_DISABLED 0x00000200 /* IRQ disabled - do not enter! */ |
| 55 | #define IRQ_PENDING 0x00000400 /* IRQ pending - replay on enable */ |
| 56 | #define IRQ_REPLAY 0x00000800 /* IRQ has been replayed but not acked yet */ |
| 57 | #define IRQ_AUTODETECT 0x00001000 /* IRQ is being autodetected */ |
| 58 | #define IRQ_WAITING 0x00002000 /* IRQ not yet seen - for autodetection */ |
| 59 | #define IRQ_LEVEL 0x00004000 /* IRQ level triggered */ |
| 60 | #define IRQ_MASKED 0x00008000 /* IRQ masked - shouldn't be seen again */ |
| 61 | #define IRQ_PER_CPU 0x00010000 /* IRQ is per CPU */ |
| 62 | #define IRQ_NOPROBE 0x00020000 /* IRQ is not valid for probing */ |
| 63 | #define IRQ_NOREQUEST 0x00040000 /* IRQ cannot be requested */ |
| 64 | #define IRQ_NOAUTOEN 0x00080000 /* IRQ will not be enabled on request irq */ |
Ingo Molnar | d7e25f3 | 2007-02-16 01:28:24 -0800 | [diff] [blame] | 65 | #define IRQ_WAKEUP 0x00100000 /* IRQ triggers system wakeup */ |
| 66 | #define IRQ_MOVE_PENDING 0x00200000 /* need to re-target IRQ destination */ |
| 67 | #define IRQ_NO_BALANCING 0x00400000 /* IRQ is excluded from balancing */ |
Thomas Gleixner | 1adb085 | 2008-04-28 17:01:56 +0200 | [diff] [blame] | 68 | #define IRQ_SPURIOUS_DISABLED 0x00800000 /* IRQ was disabled by the spurious trap */ |
Thomas Gleixner | f6d87f4 | 2008-11-07 13:18:30 +0100 | [diff] [blame] | 69 | #define IRQ_MOVE_PCNTXT 0x01000000 /* IRQ migration from process context */ |
| 70 | #define IRQ_AFFINITY_SET 0x02000000 /* IRQ affinity was set from userspace*/ |
Rafael J. Wysocki | 0a0c516 | 2009-03-16 22:33:49 +0100 | [diff] [blame] | 71 | #define IRQ_SUSPENDED 0x04000000 /* IRQ has gone through suspend sequence */ |
Thomas Gleixner | b25c340 | 2009-08-13 12:17:22 +0200 | [diff] [blame] | 72 | #define IRQ_ONESHOT 0x08000000 /* IRQ is not unmasked after hardirq */ |
Thomas Gleixner | 399b5da | 2009-08-13 13:21:38 +0200 | [diff] [blame] | 73 | #define IRQ_NESTED_THREAD 0x10000000 /* IRQ is nested into another, no own handler thread */ |
Thomas Gleixner | 950f442 | 2007-02-16 01:27:24 -0800 | [diff] [blame] | 74 | |
Thomas Gleixner | 4424718 | 2010-09-28 10:40:18 +0200 | [diff] [blame] | 75 | #define IRQF_MODIFY_MASK \ |
| 76 | (IRQ_TYPE_SENSE_MASK | IRQ_NOPROBE | IRQ_NOREQUEST | \ |
| 77 | IRQ_NOAUTOEN | IRQ_MOVE_PCNTXT | IRQ_LEVEL) |
| 78 | |
Ingo Molnar | 0d7012a | 2006-06-29 02:24:43 -0700 | [diff] [blame] | 79 | #ifdef CONFIG_IRQ_PER_CPU |
Karsten Wiese | f26fdd5 | 2005-09-06 15:17:25 -0700 | [diff] [blame] | 80 | # define CHECK_IRQ_PER_CPU(var) ((var) & IRQ_PER_CPU) |
Thomas Gleixner | 950f442 | 2007-02-16 01:27:24 -0800 | [diff] [blame] | 81 | # define IRQ_NO_BALANCING_MASK (IRQ_PER_CPU | IRQ_NO_BALANCING) |
Karsten Wiese | f26fdd5 | 2005-09-06 15:17:25 -0700 | [diff] [blame] | 82 | #else |
| 83 | # define CHECK_IRQ_PER_CPU(var) 0 |
Thomas Gleixner | 950f442 | 2007-02-16 01:27:24 -0800 | [diff] [blame] | 84 | # define IRQ_NO_BALANCING_MASK IRQ_NO_BALANCING |
Karsten Wiese | f26fdd5 | 2005-09-06 15:17:25 -0700 | [diff] [blame] | 85 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | |
Eric W. Biederman | 5b912c1 | 2007-01-28 12:52:03 -0700 | [diff] [blame] | 87 | struct msi_desc; |
Thomas Gleixner | 6a6de9e | 2006-06-29 02:24:51 -0700 | [diff] [blame] | 88 | |
Ingo Molnar | 8fee5c3 | 2006-06-29 02:24:45 -0700 | [diff] [blame] | 89 | /** |
Thomas Gleixner | ff7dcd4 | 2010-09-27 12:44:25 +0000 | [diff] [blame] | 90 | * struct irq_data - per irq and irq chip data passed down to chip functions |
| 91 | * @irq: interrupt number |
| 92 | * @node: node index useful for balancing |
| 93 | * @chip: low level interrupt hardware access |
| 94 | * @handler_data: per-IRQ data for the irq_chip methods |
| 95 | * @chip_data: platform-specific per-chip private data for the chip |
| 96 | * methods, to allow shared chip implementations |
| 97 | * @msi_desc: MSI descriptor |
| 98 | * @affinity: IRQ affinity on SMP |
Thomas Gleixner | ff7dcd4 | 2010-09-27 12:44:25 +0000 | [diff] [blame] | 99 | * |
| 100 | * The fields here need to overlay the ones in irq_desc until we |
| 101 | * cleaned up the direct references and switched everything over to |
| 102 | * irq_data. |
| 103 | */ |
| 104 | struct irq_data { |
| 105 | unsigned int irq; |
| 106 | unsigned int node; |
| 107 | struct irq_chip *chip; |
| 108 | void *handler_data; |
| 109 | void *chip_data; |
| 110 | struct msi_desc *msi_desc; |
| 111 | #ifdef CONFIG_SMP |
| 112 | cpumask_var_t affinity; |
| 113 | #endif |
Thomas Gleixner | ff7dcd4 | 2010-09-27 12:44:25 +0000 | [diff] [blame] | 114 | }; |
| 115 | |
| 116 | /** |
Thomas Gleixner | 6a6de9e | 2006-06-29 02:24:51 -0700 | [diff] [blame] | 117 | * struct irq_chip - hardware interrupt chip descriptor |
Ingo Molnar | 8fee5c3 | 2006-06-29 02:24:45 -0700 | [diff] [blame] | 118 | * |
| 119 | * @name: name for /proc/interrupts |
Thomas Gleixner | f882265 | 2010-09-27 12:44:32 +0000 | [diff] [blame] | 120 | * @startup: deprecated, replaced by irq_startup |
| 121 | * @shutdown: deprecated, replaced by irq_shutdown |
| 122 | * @enable: deprecated, replaced by irq_enable |
| 123 | * @disable: deprecated, replaced by irq_disable |
| 124 | * @ack: deprecated, replaced by irq_ack |
| 125 | * @mask: deprecated, replaced by irq_mask |
| 126 | * @mask_ack: deprecated, replaced by irq_mask_ack |
| 127 | * @unmask: deprecated, replaced by irq_unmask |
| 128 | * @eoi: deprecated, replaced by irq_eoi |
| 129 | * @end: deprecated, will go away with __do_IRQ() |
| 130 | * @set_affinity: deprecated, replaced by irq_set_affinity |
| 131 | * @retrigger: deprecated, replaced by irq_retrigger |
| 132 | * @set_type: deprecated, replaced by irq_set_type |
| 133 | * @set_wake: deprecated, replaced by irq_wake |
| 134 | * @bus_lock: deprecated, replaced by irq_bus_lock |
| 135 | * @bus_sync_unlock: deprecated, replaced by irq_bus_sync_unlock |
Ingo Molnar | 8fee5c3 | 2006-06-29 02:24:45 -0700 | [diff] [blame] | 136 | * |
Thomas Gleixner | f882265 | 2010-09-27 12:44:32 +0000 | [diff] [blame] | 137 | * @irq_startup: start up the interrupt (defaults to ->enable if NULL) |
| 138 | * @irq_shutdown: shut down the interrupt (defaults to ->disable if NULL) |
| 139 | * @irq_enable: enable the interrupt (defaults to chip->unmask if NULL) |
| 140 | * @irq_disable: disable the interrupt |
| 141 | * @irq_ack: start of a new interrupt |
| 142 | * @irq_mask: mask an interrupt source |
| 143 | * @irq_mask_ack: ack and mask an interrupt source |
| 144 | * @irq_unmask: unmask an interrupt source |
| 145 | * @irq_eoi: end of interrupt |
| 146 | * @irq_set_affinity: set the CPU affinity on SMP machines |
| 147 | * @irq_retrigger: resend an IRQ to the CPU |
| 148 | * @irq_set_type: set the flow type (IRQ_TYPE_LEVEL/etc.) of an IRQ |
| 149 | * @irq_set_wake: enable/disable power-management wake-on of an IRQ |
| 150 | * @irq_bus_lock: function to lock access to slow bus (i2c) chips |
| 151 | * @irq_bus_sync_unlock:function to sync and unlock slow bus (i2c) chips |
Thomas Gleixner | 70aedd2 | 2009-08-13 12:17:48 +0200 | [diff] [blame] | 152 | * |
Ingo Molnar | 8fee5c3 | 2006-06-29 02:24:45 -0700 | [diff] [blame] | 153 | * @release: release function solely used by UML |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | */ |
Thomas Gleixner | 6a6de9e | 2006-06-29 02:24:51 -0700 | [diff] [blame] | 155 | struct irq_chip { |
| 156 | const char *name; |
Thomas Gleixner | bd15141 | 2010-10-01 15:17:14 +0200 | [diff] [blame] | 157 | #ifndef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED |
Ingo Molnar | 71d218b | 2006-06-29 02:24:41 -0700 | [diff] [blame] | 158 | unsigned int (*startup)(unsigned int irq); |
| 159 | void (*shutdown)(unsigned int irq); |
| 160 | void (*enable)(unsigned int irq); |
| 161 | void (*disable)(unsigned int irq); |
Thomas Gleixner | 6a6de9e | 2006-06-29 02:24:51 -0700 | [diff] [blame] | 162 | |
Ingo Molnar | 71d218b | 2006-06-29 02:24:41 -0700 | [diff] [blame] | 163 | void (*ack)(unsigned int irq); |
Thomas Gleixner | 6a6de9e | 2006-06-29 02:24:51 -0700 | [diff] [blame] | 164 | void (*mask)(unsigned int irq); |
| 165 | void (*mask_ack)(unsigned int irq); |
| 166 | void (*unmask)(unsigned int irq); |
Ingo Molnar | 47c2a3a | 2006-06-29 02:25:03 -0700 | [diff] [blame] | 167 | void (*eoi)(unsigned int irq); |
Thomas Gleixner | 6a6de9e | 2006-06-29 02:24:51 -0700 | [diff] [blame] | 168 | |
Ingo Molnar | 71d218b | 2006-06-29 02:24:41 -0700 | [diff] [blame] | 169 | void (*end)(unsigned int irq); |
Yinghai Lu | d5dedd4 | 2009-04-27 17:59:21 -0700 | [diff] [blame] | 170 | int (*set_affinity)(unsigned int irq, |
Rusty Russell | 0de2652 | 2008-12-13 21:20:26 +1030 | [diff] [blame] | 171 | const struct cpumask *dest); |
Ingo Molnar | c0ad90a | 2006-06-29 02:24:44 -0700 | [diff] [blame] | 172 | int (*retrigger)(unsigned int irq); |
Thomas Gleixner | 6a6de9e | 2006-06-29 02:24:51 -0700 | [diff] [blame] | 173 | int (*set_type)(unsigned int irq, unsigned int flow_type); |
| 174 | int (*set_wake)(unsigned int irq, unsigned int on); |
Ingo Molnar | c0ad90a | 2006-06-29 02:24:44 -0700 | [diff] [blame] | 175 | |
Thomas Gleixner | 70aedd2 | 2009-08-13 12:17:48 +0200 | [diff] [blame] | 176 | void (*bus_lock)(unsigned int irq); |
| 177 | void (*bus_sync_unlock)(unsigned int irq); |
Thomas Gleixner | bd15141 | 2010-10-01 15:17:14 +0200 | [diff] [blame] | 178 | #endif |
Thomas Gleixner | f882265 | 2010-09-27 12:44:32 +0000 | [diff] [blame] | 179 | unsigned int (*irq_startup)(struct irq_data *data); |
| 180 | void (*irq_shutdown)(struct irq_data *data); |
| 181 | void (*irq_enable)(struct irq_data *data); |
| 182 | void (*irq_disable)(struct irq_data *data); |
| 183 | |
| 184 | void (*irq_ack)(struct irq_data *data); |
| 185 | void (*irq_mask)(struct irq_data *data); |
| 186 | void (*irq_mask_ack)(struct irq_data *data); |
| 187 | void (*irq_unmask)(struct irq_data *data); |
| 188 | void (*irq_eoi)(struct irq_data *data); |
| 189 | |
| 190 | int (*irq_set_affinity)(struct irq_data *data, const struct cpumask *dest, bool force); |
| 191 | int (*irq_retrigger)(struct irq_data *data); |
| 192 | int (*irq_set_type)(struct irq_data *data, unsigned int flow_type); |
| 193 | int (*irq_set_wake)(struct irq_data *data, unsigned int on); |
| 194 | |
| 195 | void (*irq_bus_lock)(struct irq_data *data); |
| 196 | void (*irq_bus_sync_unlock)(struct irq_data *data); |
| 197 | |
Paolo 'Blaisorblade' Giarrusso | b77d6ad | 2005-06-21 17:16:24 -0700 | [diff] [blame] | 198 | /* Currently used only by UML, might disappear one day.*/ |
| 199 | #ifdef CONFIG_IRQ_RELEASE_METHOD |
Ingo Molnar | 71d218b | 2006-06-29 02:24:41 -0700 | [diff] [blame] | 200 | void (*release)(unsigned int irq, void *dev_id); |
Paolo 'Blaisorblade' Giarrusso | b77d6ad | 2005-06-21 17:16:24 -0700 | [diff] [blame] | 201 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | }; |
| 203 | |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 204 | /* This include will go away once we isolated irq_desc usage to core code */ |
| 205 | #include <linux/irqdesc.h> |
Thomas Gleixner | c6b7674 | 2008-10-15 14:31:29 +0200 | [diff] [blame] | 206 | |
Ingo Molnar | 34ffdb7 | 2006-06-29 02:24:40 -0700 | [diff] [blame] | 207 | /* |
Ingo Molnar | 34ffdb7 | 2006-06-29 02:24:40 -0700 | [diff] [blame] | 208 | * Pick up the arch-dependent methods: |
| 209 | */ |
| 210 | #include <asm/hw_irq.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | |
Thomas Gleixner | b683de2 | 2010-09-27 20:55:03 +0200 | [diff] [blame] | 212 | #ifndef NR_IRQS_LEGACY |
| 213 | # define NR_IRQS_LEGACY 0 |
| 214 | #endif |
| 215 | |
Thomas Gleixner | 1318a48 | 2010-09-27 21:01:37 +0200 | [diff] [blame] | 216 | #ifndef ARCH_IRQ_INIT_FLAGS |
| 217 | # define ARCH_IRQ_INIT_FLAGS 0 |
| 218 | #endif |
| 219 | |
| 220 | #define IRQ_DEFAULT_INIT_FLAGS (IRQ_DISABLED | ARCH_IRQ_INIT_FLAGS) |
| 221 | |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 222 | struct irqaction; |
Ingo Molnar | 06fcb0c | 2006-06-29 02:24:40 -0700 | [diff] [blame] | 223 | extern int setup_irq(unsigned int irq, struct irqaction *new); |
Magnus Damm | cbf94f0 | 2009-03-12 21:05:51 +0900 | [diff] [blame] | 224 | extern void remove_irq(unsigned int irq, struct irqaction *act); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | |
| 226 | #ifdef CONFIG_GENERIC_HARDIRQS |
Ingo Molnar | 06fcb0c | 2006-06-29 02:24:40 -0700 | [diff] [blame] | 227 | |
Thomas Gleixner | 3a3856d0 | 2010-10-04 13:47:12 +0200 | [diff] [blame] | 228 | #if defined(CONFIG_SMP) && defined(CONFIG_GENERIC_PENDING_IRQ) |
Andrew Morton | c777ac5 | 2006-03-25 03:07:36 -0800 | [diff] [blame] | 229 | void move_native_irq(int irq); |
Eric W. Biederman | e7b946e | 2006-10-04 02:16:29 -0700 | [diff] [blame] | 230 | void move_masked_irq(int irq); |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 231 | #else |
| 232 | static inline void move_native_irq(int irq) { } |
| 233 | static inline void move_masked_irq(int irq) { } |
| 234 | #endif |
Ashok Raj | 54d5d42 | 2005-09-06 15:16:15 -0700 | [diff] [blame] | 235 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | extern int no_irq_affinity; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | |
Thomas Gleixner | 6a6de9e | 2006-06-29 02:24:51 -0700 | [diff] [blame] | 238 | /* Handle irq action chains: */ |
Thomas Gleixner | bedd30d | 2008-09-30 23:14:27 +0200 | [diff] [blame] | 239 | extern irqreturn_t handle_IRQ_event(unsigned int irq, struct irqaction *action); |
Thomas Gleixner | 6a6de9e | 2006-06-29 02:24:51 -0700 | [diff] [blame] | 240 | |
Ingo Molnar | 2e60bbb | 2006-06-29 02:24:39 -0700 | [diff] [blame] | 241 | /* |
Thomas Gleixner | 6a6de9e | 2006-06-29 02:24:51 -0700 | [diff] [blame] | 242 | * Built-in IRQ handlers for various IRQ types, |
Krzysztof Halasa | bebd04c | 2009-11-15 18:57:24 +0100 | [diff] [blame] | 243 | * callable via desc->handle_irq() |
Thomas Gleixner | 6a6de9e | 2006-06-29 02:24:51 -0700 | [diff] [blame] | 244 | */ |
Harvey Harrison | ec70158 | 2008-02-08 04:19:55 -0800 | [diff] [blame] | 245 | extern void handle_level_irq(unsigned int irq, struct irq_desc *desc); |
| 246 | extern void handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc); |
| 247 | extern void handle_edge_irq(unsigned int irq, struct irq_desc *desc); |
| 248 | extern void handle_simple_irq(unsigned int irq, struct irq_desc *desc); |
| 249 | extern void handle_percpu_irq(unsigned int irq, struct irq_desc *desc); |
| 250 | extern void handle_bad_irq(unsigned int irq, struct irq_desc *desc); |
Mark Brown | 31b47cf | 2009-08-24 20:28:04 +0100 | [diff] [blame] | 251 | extern void handle_nested_irq(unsigned int irq); |
Thomas Gleixner | 6a6de9e | 2006-06-29 02:24:51 -0700 | [diff] [blame] | 252 | |
Thomas Gleixner | 6a6de9e | 2006-06-29 02:24:51 -0700 | [diff] [blame] | 253 | /* Handling of unhandled and spurious interrupts: */ |
Ingo Molnar | 34ffdb7 | 2006-06-29 02:24:40 -0700 | [diff] [blame] | 254 | extern void note_interrupt(unsigned int irq, struct irq_desc *desc, |
Thomas Gleixner | bedd30d | 2008-09-30 23:14:27 +0200 | [diff] [blame] | 255 | irqreturn_t action_ret); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | |
Thomas Gleixner | a4633adc | 2006-06-29 02:24:48 -0700 | [diff] [blame] | 257 | |
Thomas Gleixner | 6a6de9e | 2006-06-29 02:24:51 -0700 | [diff] [blame] | 258 | /* Enable/disable irq debugging output: */ |
| 259 | extern int noirqdebug_setup(char *str); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | |
Thomas Gleixner | 6a6de9e | 2006-06-29 02:24:51 -0700 | [diff] [blame] | 261 | /* Checks whether the interrupt can be requested by request_irq(): */ |
| 262 | extern int can_request_irq(unsigned int irq, unsigned long irqflags); |
| 263 | |
Thomas Gleixner | f8b5473 | 2006-07-01 22:30:08 +0100 | [diff] [blame] | 264 | /* Dummy irq-chip implementations: */ |
Thomas Gleixner | 6a6de9e | 2006-06-29 02:24:51 -0700 | [diff] [blame] | 265 | extern struct irq_chip no_irq_chip; |
Thomas Gleixner | f8b5473 | 2006-07-01 22:30:08 +0100 | [diff] [blame] | 266 | extern struct irq_chip dummy_irq_chip; |
Thomas Gleixner | 6a6de9e | 2006-06-29 02:24:51 -0700 | [diff] [blame] | 267 | |
| 268 | extern void |
Ingo Molnar | 145fc65 | 2006-10-19 23:28:28 -0700 | [diff] [blame] | 269 | set_irq_chip_and_handler(unsigned int irq, struct irq_chip *chip, |
| 270 | irq_flow_handler_t handle); |
| 271 | extern void |
Ingo Molnar | a460e74 | 2006-10-17 00:10:03 -0700 | [diff] [blame] | 272 | set_irq_chip_and_handler_name(unsigned int irq, struct irq_chip *chip, |
| 273 | irq_flow_handler_t handle, const char *name); |
| 274 | |
Thomas Gleixner | 6a6de9e | 2006-06-29 02:24:51 -0700 | [diff] [blame] | 275 | extern void |
Ingo Molnar | a460e74 | 2006-10-17 00:10:03 -0700 | [diff] [blame] | 276 | __set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained, |
| 277 | const char *name); |
Thomas Gleixner | 6a6de9e | 2006-06-29 02:24:51 -0700 | [diff] [blame] | 278 | |
| 279 | /* |
| 280 | * Set a highlevel flow handler for a given IRQ: |
| 281 | */ |
| 282 | static inline void |
David Howells | 57a58a9 | 2006-10-05 13:06:34 +0100 | [diff] [blame] | 283 | set_irq_handler(unsigned int irq, irq_flow_handler_t handle) |
Thomas Gleixner | 6a6de9e | 2006-06-29 02:24:51 -0700 | [diff] [blame] | 284 | { |
Ingo Molnar | a460e74 | 2006-10-17 00:10:03 -0700 | [diff] [blame] | 285 | __set_irq_handler(irq, handle, 0, NULL); |
Thomas Gleixner | 6a6de9e | 2006-06-29 02:24:51 -0700 | [diff] [blame] | 286 | } |
| 287 | |
| 288 | /* |
| 289 | * Set a highlevel chained flow handler for a given IRQ. |
| 290 | * (a chained handler is automatically enabled and set to |
| 291 | * IRQ_NOREQUEST and IRQ_NOPROBE) |
| 292 | */ |
| 293 | static inline void |
| 294 | set_irq_chained_handler(unsigned int irq, |
David Howells | 57a58a9 | 2006-10-05 13:06:34 +0100 | [diff] [blame] | 295 | irq_flow_handler_t handle) |
Thomas Gleixner | 6a6de9e | 2006-06-29 02:24:51 -0700 | [diff] [blame] | 296 | { |
Ingo Molnar | a460e74 | 2006-10-17 00:10:03 -0700 | [diff] [blame] | 297 | __set_irq_handler(irq, handle, 1, NULL); |
Thomas Gleixner | 6a6de9e | 2006-06-29 02:24:51 -0700 | [diff] [blame] | 298 | } |
| 299 | |
Thomas Gleixner | 399b5da | 2009-08-13 13:21:38 +0200 | [diff] [blame] | 300 | extern void set_irq_nested_thread(unsigned int irq, int nest); |
| 301 | |
Thomas Gleixner | 4424718 | 2010-09-28 10:40:18 +0200 | [diff] [blame] | 302 | void irq_modify_status(unsigned int irq, unsigned long clr, unsigned long set); |
| 303 | |
| 304 | static inline void irq_set_status_flags(unsigned int irq, unsigned long set) |
| 305 | { |
| 306 | irq_modify_status(irq, 0, set); |
| 307 | } |
| 308 | |
| 309 | static inline void irq_clear_status_flags(unsigned int irq, unsigned long clr) |
| 310 | { |
| 311 | irq_modify_status(irq, clr, 0); |
| 312 | } |
| 313 | |
| 314 | static inline void set_irq_noprobe(unsigned int irq) |
| 315 | { |
| 316 | irq_modify_status(irq, 0, IRQ_NOPROBE); |
| 317 | } |
| 318 | |
| 319 | static inline void set_irq_probe(unsigned int irq) |
| 320 | { |
| 321 | irq_modify_status(irq, IRQ_NOPROBE, 0); |
| 322 | } |
Ralf Baechle | 46f4f8f | 2008-02-08 04:22:01 -0800 | [diff] [blame] | 323 | |
Eric W. Biederman | 3a16d71 | 2006-10-04 02:16:37 -0700 | [diff] [blame] | 324 | /* Handle dynamic irq creation and destruction */ |
Yinghai Lu | d047f53a | 2009-04-27 18:02:23 -0700 | [diff] [blame] | 325 | extern unsigned int create_irq_nr(unsigned int irq_want, int node); |
Eric W. Biederman | 3a16d71 | 2006-10-04 02:16:37 -0700 | [diff] [blame] | 326 | extern int create_irq(void); |
| 327 | extern void destroy_irq(unsigned int irq); |
Thomas Gleixner | dd87eb3 | 2006-06-29 02:24:53 -0700 | [diff] [blame] | 328 | |
Thomas Gleixner | b7b2933 | 2010-09-29 18:46:55 +0200 | [diff] [blame] | 329 | /* |
| 330 | * Dynamic irq helper functions. Obsolete. Use irq_alloc_desc* and |
| 331 | * irq_free_desc instead. |
| 332 | */ |
Eric W. Biederman | 3a16d71 | 2006-10-04 02:16:37 -0700 | [diff] [blame] | 333 | extern void dynamic_irq_cleanup(unsigned int irq); |
Thomas Gleixner | b7b2933 | 2010-09-29 18:46:55 +0200 | [diff] [blame] | 334 | static inline void dynamic_irq_init(unsigned int irq) |
| 335 | { |
| 336 | dynamic_irq_cleanup(irq); |
| 337 | } |
Eric W. Biederman | 3a16d71 | 2006-10-04 02:16:37 -0700 | [diff] [blame] | 338 | |
| 339 | /* Set/get chip/data for an IRQ: */ |
Thomas Gleixner | dd87eb3 | 2006-06-29 02:24:53 -0700 | [diff] [blame] | 340 | extern int set_irq_chip(unsigned int irq, struct irq_chip *chip); |
| 341 | extern int set_irq_data(unsigned int irq, void *data); |
| 342 | extern int set_irq_chip_data(unsigned int irq, void *data); |
| 343 | extern int set_irq_type(unsigned int irq, unsigned int type); |
Eric W. Biederman | 5b912c1 | 2007-01-28 12:52:03 -0700 | [diff] [blame] | 344 | extern int set_irq_msi(unsigned int irq, struct msi_desc *entry); |
Thomas Gleixner | f303a6d | 2010-09-28 17:34:01 +0200 | [diff] [blame] | 345 | extern struct irq_data *irq_get_irq_data(unsigned int irq); |
Thomas Gleixner | dd87eb3 | 2006-06-29 02:24:53 -0700 | [diff] [blame] | 346 | |
Thomas Gleixner | f303a6d | 2010-09-28 17:34:01 +0200 | [diff] [blame] | 347 | static inline struct irq_chip *get_irq_chip(unsigned int irq) |
| 348 | { |
| 349 | struct irq_data *d = irq_get_irq_data(irq); |
| 350 | return d ? d->chip : NULL; |
| 351 | } |
| 352 | |
| 353 | static inline struct irq_chip *irq_data_get_irq_chip(struct irq_data *d) |
| 354 | { |
| 355 | return d->chip; |
| 356 | } |
| 357 | |
| 358 | static inline void *get_irq_chip_data(unsigned int irq) |
| 359 | { |
| 360 | struct irq_data *d = irq_get_irq_data(irq); |
| 361 | return d ? d->chip_data : NULL; |
| 362 | } |
| 363 | |
| 364 | static inline void *irq_data_get_irq_chip_data(struct irq_data *d) |
| 365 | { |
| 366 | return d->chip_data; |
| 367 | } |
| 368 | |
| 369 | static inline void *get_irq_data(unsigned int irq) |
| 370 | { |
| 371 | struct irq_data *d = irq_get_irq_data(irq); |
| 372 | return d ? d->handler_data : NULL; |
| 373 | } |
| 374 | |
| 375 | static inline void *irq_data_get_irq_data(struct irq_data *d) |
| 376 | { |
| 377 | return d->handler_data; |
| 378 | } |
| 379 | |
| 380 | static inline struct msi_desc *get_irq_msi(unsigned int irq) |
| 381 | { |
| 382 | struct irq_data *d = irq_get_irq_data(irq); |
| 383 | return d ? d->msi_desc : NULL; |
| 384 | } |
| 385 | |
| 386 | static inline struct msi_desc *irq_data_get_msi(struct irq_data *d) |
| 387 | { |
| 388 | return d->msi_desc; |
| 389 | } |
| 390 | |
Thomas Gleixner | 1f5a5b8 | 2010-09-27 17:48:26 +0200 | [diff] [blame] | 391 | int irq_alloc_descs(int irq, unsigned int from, unsigned int cnt, int node); |
| 392 | void irq_free_descs(unsigned int irq, unsigned int cnt); |
Thomas Gleixner | 06f6c33 | 2010-10-12 12:31:46 +0200 | [diff] [blame] | 393 | int irq_reserve_irqs(unsigned int from, unsigned int cnt); |
Thomas Gleixner | 1f5a5b8 | 2010-09-27 17:48:26 +0200 | [diff] [blame] | 394 | |
| 395 | static inline int irq_alloc_desc(int node) |
| 396 | { |
| 397 | return irq_alloc_descs(-1, 0, 1, node); |
| 398 | } |
| 399 | |
| 400 | static inline int irq_alloc_desc_at(unsigned int at, int node) |
| 401 | { |
| 402 | return irq_alloc_descs(at, at, 1, node); |
| 403 | } |
| 404 | |
| 405 | static inline int irq_alloc_desc_from(unsigned int from, int node) |
| 406 | { |
| 407 | return irq_alloc_descs(-1, from, 1, node); |
| 408 | } |
| 409 | |
| 410 | static inline void irq_free_desc(unsigned int irq) |
| 411 | { |
| 412 | irq_free_descs(irq, 1); |
| 413 | } |
| 414 | |
Thomas Gleixner | 6a6de9e | 2006-06-29 02:24:51 -0700 | [diff] [blame] | 415 | #endif /* CONFIG_GENERIC_HARDIRQS */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | |
Ingo Molnar | 06fcb0c | 2006-06-29 02:24:40 -0700 | [diff] [blame] | 417 | #endif /* !CONFIG_S390 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | |
Ingo Molnar | 06fcb0c | 2006-06-29 02:24:40 -0700 | [diff] [blame] | 419 | #endif /* _LINUX_IRQ_H */ |