^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 1992, 1998-2006 Linus Torvalds, Ingo Molnar
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (C) 2005-2006, Thomas Gleixner, Russell King
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * This file contains the core interrupt handling code, for irq-chip based
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * architectures. Detailed information is available in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Documentation/core-api/genericirq.rst
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/msi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/kernel_stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/irqdomain.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/wakeup_reason.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <trace/events/irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include "internals.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) static irqreturn_t bad_chained_irq(int irq, void *dev_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) WARN_ONCE(1, "Chained irq %d should not call an action\n", irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) return IRQ_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * Chained handlers should never call action on their IRQ. This default
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * action will emit warning if such thing happens.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) struct irqaction chained_action = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) .handler = bad_chained_irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * irq_set_chip - set the irq chip for an irq
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * @irq: irq number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * @chip: pointer to irq chip description structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) int irq_set_chip(unsigned int irq, struct irq_chip *chip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) if (!desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) if (!chip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) chip = &no_irq_chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) desc->irq_data.chip = chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) irq_put_desc_unlock(desc, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) * For !CONFIG_SPARSE_IRQ make the irq show up in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) * allocated_irqs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) irq_mark_irq(irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) EXPORT_SYMBOL(irq_set_chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) * irq_set_type - set the irq trigger type for an irq
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) * @irq: irq number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) * @type: IRQ_TYPE_{LEVEL,EDGE}_* value - see include/linux/irq.h
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) int irq_set_irq_type(unsigned int irq, unsigned int type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) struct irq_desc *desc = irq_get_desc_buslock(irq, &flags, IRQ_GET_DESC_CHECK_GLOBAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) if (!desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) ret = __irq_set_trigger(desc, type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) irq_put_desc_busunlock(desc, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) EXPORT_SYMBOL(irq_set_irq_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) * irq_set_handler_data - set irq handler data for an irq
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) * @irq: Interrupt number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) * @data: Pointer to interrupt specific data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) * Set the hardware irq controller data for an irq
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) int irq_set_handler_data(unsigned int irq, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) if (!desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) desc->irq_common_data.handler_data = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) irq_put_desc_unlock(desc, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) EXPORT_SYMBOL(irq_set_handler_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) * irq_set_msi_desc_off - set MSI descriptor data for an irq at offset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) * @irq_base: Interrupt number base
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) * @irq_offset: Interrupt number offset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) * @entry: Pointer to MSI descriptor data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) * Set the MSI descriptor entry for an irq at offset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) int irq_set_msi_desc_off(unsigned int irq_base, unsigned int irq_offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) struct msi_desc *entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) struct irq_desc *desc = irq_get_desc_lock(irq_base + irq_offset, &flags, IRQ_GET_DESC_CHECK_GLOBAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) if (!desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) desc->irq_common_data.msi_desc = entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) if (entry && !irq_offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) entry->irq = irq_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) irq_put_desc_unlock(desc, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) * irq_set_msi_desc - set MSI descriptor data for an irq
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) * @irq: Interrupt number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) * @entry: Pointer to MSI descriptor data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) * Set the MSI descriptor entry for an irq
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) int irq_set_msi_desc(unsigned int irq, struct msi_desc *entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) return irq_set_msi_desc_off(irq, 0, entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) * irq_set_chip_data - set irq chip data for an irq
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) * @irq: Interrupt number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) * @data: Pointer to chip specific data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) * Set the hardware irq chip data for an irq
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) int irq_set_chip_data(unsigned int irq, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) if (!desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) desc->irq_data.chip_data = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) irq_put_desc_unlock(desc, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) EXPORT_SYMBOL(irq_set_chip_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) struct irq_data *irq_get_irq_data(unsigned int irq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) struct irq_desc *desc = irq_to_desc(irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) return desc ? &desc->irq_data : NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) EXPORT_SYMBOL_GPL(irq_get_irq_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) static void irq_state_clr_disabled(struct irq_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) irqd_clear(&desc->irq_data, IRQD_IRQ_DISABLED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) static void irq_state_clr_masked(struct irq_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) irqd_clear(&desc->irq_data, IRQD_IRQ_MASKED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) static void irq_state_clr_started(struct irq_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) irqd_clear(&desc->irq_data, IRQD_IRQ_STARTED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) static void irq_state_set_started(struct irq_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) irqd_set(&desc->irq_data, IRQD_IRQ_STARTED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) IRQ_STARTUP_NORMAL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) IRQ_STARTUP_MANAGED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) IRQ_STARTUP_ABORT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) #ifdef CONFIG_SMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) __irq_startup_managed(struct irq_desc *desc, struct cpumask *aff, bool force)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) struct irq_data *d = irq_desc_get_irq_data(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) if (!irqd_affinity_is_managed(d))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) return IRQ_STARTUP_NORMAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) irqd_clr_managed_shutdown(d);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) if (cpumask_any_and(aff, cpu_online_mask) >= nr_cpu_ids) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) * Catch code which fiddles with enable_irq() on a managed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) * and potentially shutdown IRQ. Chained interrupt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) * installment or irq auto probing should not happen on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) * managed irqs either.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) if (WARN_ON_ONCE(force))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) return IRQ_STARTUP_ABORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) * The interrupt was requested, but there is no online CPU
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) * in it's affinity mask. Put it into managed shutdown
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) * state and let the cpu hotplug mechanism start it up once
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) * a CPU in the mask becomes available.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) return IRQ_STARTUP_ABORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) * Managed interrupts have reserved resources, so this should not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) * happen.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) if (WARN_ON(irq_domain_activate_irq(d, false)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) return IRQ_STARTUP_ABORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) return IRQ_STARTUP_MANAGED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) static __always_inline int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) __irq_startup_managed(struct irq_desc *desc, struct cpumask *aff, bool force)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) return IRQ_STARTUP_NORMAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) static int __irq_startup(struct irq_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) struct irq_data *d = irq_desc_get_irq_data(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) /* Warn if this interrupt is not activated but try nevertheless */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) WARN_ON_ONCE(!irqd_is_activated(d));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) if (d->chip->irq_startup) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) ret = d->chip->irq_startup(d);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) irq_state_clr_disabled(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) irq_state_clr_masked(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) irq_enable(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) irq_state_set_started(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) int irq_startup(struct irq_desc *desc, bool resend, bool force)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) struct irq_data *d = irq_desc_get_irq_data(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) struct cpumask *aff = irq_data_get_affinity_mask(d);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) desc->depth = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) if (irqd_is_started(d)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) irq_enable(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) switch (__irq_startup_managed(desc, aff, force)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) case IRQ_STARTUP_NORMAL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) if (d->chip->flags & IRQCHIP_AFFINITY_PRE_STARTUP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) irq_setup_affinity(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) ret = __irq_startup(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) if (!(d->chip->flags & IRQCHIP_AFFINITY_PRE_STARTUP))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) irq_setup_affinity(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) case IRQ_STARTUP_MANAGED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) irq_do_set_affinity(d, aff, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) ret = __irq_startup(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) case IRQ_STARTUP_ABORT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) irqd_set_managed_shutdown(d);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) if (resend)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) check_irq_resend(desc, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) int irq_activate(struct irq_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) struct irq_data *d = irq_desc_get_irq_data(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) if (!irqd_affinity_is_managed(d))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) return irq_domain_activate_irq(d, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) int irq_activate_and_startup(struct irq_desc *desc, bool resend)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) if (WARN_ON(irq_activate(desc)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) return irq_startup(desc, resend, IRQ_START_FORCE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) static void __irq_disable(struct irq_desc *desc, bool mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) void irq_shutdown(struct irq_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) if (irqd_is_started(&desc->irq_data)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) desc->depth = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) if (desc->irq_data.chip->irq_shutdown) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) desc->irq_data.chip->irq_shutdown(&desc->irq_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) irq_state_set_disabled(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) irq_state_set_masked(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) __irq_disable(desc, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) irq_state_clr_started(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) void irq_shutdown_and_deactivate(struct irq_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) irq_shutdown(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) * This must be called even if the interrupt was never started up,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) * because the activation can happen before the interrupt is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) * available for request/startup. It has it's own state tracking so
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) * it's safe to call it unconditionally.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) irq_domain_deactivate_irq(&desc->irq_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) void irq_enable(struct irq_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) if (!irqd_irq_disabled(&desc->irq_data)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) unmask_irq(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) irq_state_clr_disabled(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) if (desc->irq_data.chip->irq_enable) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) desc->irq_data.chip->irq_enable(&desc->irq_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) irq_state_clr_masked(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) unmask_irq(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) static void __irq_disable(struct irq_desc *desc, bool mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) if (irqd_irq_disabled(&desc->irq_data)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) if (mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) mask_irq(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) irq_state_set_disabled(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) if (desc->irq_data.chip->irq_disable) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) desc->irq_data.chip->irq_disable(&desc->irq_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) irq_state_set_masked(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) } else if (mask) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) mask_irq(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) * irq_disable - Mark interrupt disabled
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) * @desc: irq descriptor which should be disabled
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) * If the chip does not implement the irq_disable callback, we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) * use a lazy disable approach. That means we mark the interrupt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) * disabled, but leave the hardware unmasked. That's an
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) * optimization because we avoid the hardware access for the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) * common case where no interrupt happens after we marked it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) * disabled. If an interrupt happens, then the interrupt flow
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) * handler masks the line at the hardware level and marks it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) * pending.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) * If the interrupt chip does not implement the irq_disable callback,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) * a driver can disable the lazy approach for a particular irq line by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) * calling 'irq_set_status_flags(irq, IRQ_DISABLE_UNLAZY)'. This can
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) * be used for devices which cannot disable the interrupt at the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) * device level under certain circumstances and have to use
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) * disable_irq[_nosync] instead.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) void irq_disable(struct irq_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) __irq_disable(desc, irq_settings_disable_unlazy(desc));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) void irq_percpu_enable(struct irq_desc *desc, unsigned int cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) if (desc->irq_data.chip->irq_enable)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) desc->irq_data.chip->irq_enable(&desc->irq_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) desc->irq_data.chip->irq_unmask(&desc->irq_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) cpumask_set_cpu(cpu, desc->percpu_enabled);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) void irq_percpu_disable(struct irq_desc *desc, unsigned int cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) if (desc->irq_data.chip->irq_disable)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) desc->irq_data.chip->irq_disable(&desc->irq_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) desc->irq_data.chip->irq_mask(&desc->irq_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) cpumask_clear_cpu(cpu, desc->percpu_enabled);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) static inline void mask_ack_irq(struct irq_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) if (desc->irq_data.chip->irq_mask_ack) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) desc->irq_data.chip->irq_mask_ack(&desc->irq_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) irq_state_set_masked(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) mask_irq(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) if (desc->irq_data.chip->irq_ack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) desc->irq_data.chip->irq_ack(&desc->irq_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) void mask_irq(struct irq_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) if (irqd_irq_masked(&desc->irq_data))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) if (desc->irq_data.chip->irq_mask) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) desc->irq_data.chip->irq_mask(&desc->irq_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) irq_state_set_masked(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) void unmask_irq(struct irq_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) if (!irqd_irq_masked(&desc->irq_data))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) if (desc->irq_data.chip->irq_unmask) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) desc->irq_data.chip->irq_unmask(&desc->irq_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) irq_state_clr_masked(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) void unmask_threaded_irq(struct irq_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) struct irq_chip *chip = desc->irq_data.chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) if (chip->flags & IRQCHIP_EOI_THREADED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) chip->irq_eoi(&desc->irq_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) unmask_irq(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) * handle_nested_irq - Handle a nested irq from a irq thread
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) * @irq: the interrupt number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) * Handle interrupts which are nested into a threaded interrupt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) * handler. The handler function is called inside the calling
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) * threads context.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) void handle_nested_irq(unsigned int irq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) struct irq_desc *desc = irq_to_desc(irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) struct irqaction *action;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) irqreturn_t action_ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) might_sleep();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) raw_spin_lock_irq(&desc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) action = desc->action;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) if (unlikely(!action || irqd_irq_disabled(&desc->irq_data))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) desc->istate |= IRQS_PENDING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) kstat_incr_irqs_this_cpu(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) irqd_set(&desc->irq_data, IRQD_IRQ_INPROGRESS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) raw_spin_unlock_irq(&desc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) action_ret = IRQ_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) for_each_action_of_desc(desc, action)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) action_ret |= action->thread_fn(action->irq, action->dev_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) if (!noirqdebug)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) note_interrupt(desc, action_ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) raw_spin_lock_irq(&desc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) irqd_clear(&desc->irq_data, IRQD_IRQ_INPROGRESS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) out_unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) raw_spin_unlock_irq(&desc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) EXPORT_SYMBOL_GPL(handle_nested_irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) static bool irq_check_poll(struct irq_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) if (!(desc->istate & IRQS_POLL_INPROGRESS))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) return irq_wait_for_poll(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) static bool irq_may_run(struct irq_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) unsigned int mask = IRQD_IRQ_INPROGRESS | IRQD_WAKEUP_ARMED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) * If the interrupt is not in progress and is not an armed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) * wakeup interrupt, proceed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) if (!irqd_has_set(&desc->irq_data, mask)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) #ifdef CONFIG_PM_SLEEP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) if (unlikely(desc->no_suspend_depth &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) irqd_is_wakeup_set(&desc->irq_data))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) unsigned int irq = irq_desc_get_irq(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) const char *name = "(unnamed)";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) if (desc->action && desc->action->name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) name = desc->action->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) log_abnormal_wakeup_reason("misconfigured IRQ %u %s",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) irq, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) * If the interrupt is an armed wakeup source, mark it pending
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) * and suspended, disable it and notify the pm core about the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) * event.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) if (irq_pm_check_wakeup(desc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) * Handle a potential concurrent poll on a different core.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) return irq_check_poll(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) * handle_simple_irq - Simple and software-decoded IRQs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) * @desc: the interrupt description structure for this irq
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) * Simple interrupts are either sent from a demultiplexing interrupt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) * handler or come from hardware, where no interrupt hardware control
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) * is necessary.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) * Note: The caller is expected to handle the ack, clear, mask and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) * unmask issues if necessary.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) void handle_simple_irq(struct irq_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) raw_spin_lock(&desc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) if (!irq_may_run(desc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) desc->istate |= IRQS_PENDING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) kstat_incr_irqs_this_cpu(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) handle_irq_event(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) out_unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) raw_spin_unlock(&desc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) EXPORT_SYMBOL_GPL(handle_simple_irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) * handle_untracked_irq - Simple and software-decoded IRQs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) * @desc: the interrupt description structure for this irq
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) * Untracked interrupts are sent from a demultiplexing interrupt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) * handler when the demultiplexer does not know which device it its
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) * multiplexed irq domain generated the interrupt. IRQ's handled
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) * through here are not subjected to stats tracking, randomness, or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) * spurious interrupt detection.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) * Note: Like handle_simple_irq, the caller is expected to handle
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) * the ack, clear, mask and unmask issues if necessary.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) void handle_untracked_irq(struct irq_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) unsigned int flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) raw_spin_lock(&desc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) if (!irq_may_run(desc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) desc->istate |= IRQS_PENDING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) desc->istate &= ~IRQS_PENDING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) irqd_set(&desc->irq_data, IRQD_IRQ_INPROGRESS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) raw_spin_unlock(&desc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) __handle_irq_event_percpu(desc, &flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) raw_spin_lock(&desc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) irqd_clear(&desc->irq_data, IRQD_IRQ_INPROGRESS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) out_unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) raw_spin_unlock(&desc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) EXPORT_SYMBOL_GPL(handle_untracked_irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) * Called unconditionally from handle_level_irq() and only for oneshot
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) * interrupts from handle_fasteoi_irq()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) static void cond_unmask_irq(struct irq_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) * We need to unmask in the following cases:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) * - Standard level irq (IRQF_ONESHOT is not set)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) * - Oneshot irq which did not wake the thread (caused by a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) * spurious interrupt or a primary handler handling it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) * completely).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) if (!irqd_irq_disabled(&desc->irq_data) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) irqd_irq_masked(&desc->irq_data) && !desc->threads_oneshot)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) unmask_irq(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) * handle_level_irq - Level type irq handler
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) * @desc: the interrupt description structure for this irq
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) * Level type interrupts are active as long as the hardware line has
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) * the active level. This may require to mask the interrupt and unmask
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) * it after the associated handler has acknowledged the device, so the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) * interrupt line is back to inactive.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) void handle_level_irq(struct irq_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) raw_spin_lock(&desc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) mask_ack_irq(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) if (!irq_may_run(desc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) * If its disabled or no action available
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) * keep it masked and get out of here
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) desc->istate |= IRQS_PENDING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) kstat_incr_irqs_this_cpu(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) handle_irq_event(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) cond_unmask_irq(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) out_unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) raw_spin_unlock(&desc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) EXPORT_SYMBOL_GPL(handle_level_irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) static void cond_unmask_eoi_irq(struct irq_desc *desc, struct irq_chip *chip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) if (!(desc->istate & IRQS_ONESHOT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) chip->irq_eoi(&desc->irq_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) * We need to unmask in the following cases:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) * - Oneshot irq which did not wake the thread (caused by a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) * spurious interrupt or a primary handler handling it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) * completely).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) if (!irqd_irq_disabled(&desc->irq_data) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) irqd_irq_masked(&desc->irq_data) && !desc->threads_oneshot) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) chip->irq_eoi(&desc->irq_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) unmask_irq(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) } else if (!(chip->flags & IRQCHIP_EOI_THREADED)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) chip->irq_eoi(&desc->irq_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) * handle_fasteoi_irq - irq handler for transparent controllers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) * @desc: the interrupt description structure for this irq
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) * Only a single callback will be issued to the chip: an ->eoi()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) * call when the interrupt has been serviced. This enables support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) * for modern forms of interrupt handlers, which handle the flow
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) * details in hardware, transparently.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) void handle_fasteoi_irq(struct irq_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) struct irq_chip *chip = desc->irq_data.chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) raw_spin_lock(&desc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) if (!irq_may_run(desc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) * If its disabled or no action available
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) * then mask it and get out of here:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) desc->istate |= IRQS_PENDING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) mask_irq(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) kstat_incr_irqs_this_cpu(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) if (desc->istate & IRQS_ONESHOT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) mask_irq(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) handle_irq_event(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) cond_unmask_eoi_irq(desc, chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) raw_spin_unlock(&desc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) if (!(chip->flags & IRQCHIP_EOI_IF_HANDLED))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) chip->irq_eoi(&desc->irq_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) raw_spin_unlock(&desc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) EXPORT_SYMBOL_GPL(handle_fasteoi_irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) * handle_fasteoi_nmi - irq handler for NMI interrupt lines
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) * @desc: the interrupt description structure for this irq
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) * A simple NMI-safe handler, considering the restrictions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) * from request_nmi.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) * Only a single callback will be issued to the chip: an ->eoi()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) * call when the interrupt has been serviced. This enables support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) * for modern forms of interrupt handlers, which handle the flow
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) * details in hardware, transparently.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) void handle_fasteoi_nmi(struct irq_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) struct irq_chip *chip = irq_desc_get_chip(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) struct irqaction *action = desc->action;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) unsigned int irq = irq_desc_get_irq(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) irqreturn_t res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) __kstat_incr_irqs_this_cpu(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) trace_irq_handler_entry(irq, action);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) * NMIs cannot be shared, there is only one action.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) res = action->handler(irq, action->dev_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) trace_irq_handler_exit(irq, action, res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) if (chip->irq_eoi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) chip->irq_eoi(&desc->irq_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) EXPORT_SYMBOL_GPL(handle_fasteoi_nmi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) * handle_edge_irq - edge type IRQ handler
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) * @desc: the interrupt description structure for this irq
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) * Interrupt occures on the falling and/or rising edge of a hardware
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) * signal. The occurrence is latched into the irq controller hardware
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) * and must be acked in order to be reenabled. After the ack another
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) * interrupt can happen on the same source even before the first one
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) * is handled by the associated event handler. If this happens it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) * might be necessary to disable (mask) the interrupt depending on the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) * controller hardware. This requires to reenable the interrupt inside
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) * of the loop which handles the interrupts which have arrived while
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) * the handler was running. If all pending interrupts are handled, the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) * loop is left.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) void handle_edge_irq(struct irq_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) raw_spin_lock(&desc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) if (!irq_may_run(desc)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) desc->istate |= IRQS_PENDING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) mask_ack_irq(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) * If its disabled or no action available then mask it and get
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) * out of here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) if (irqd_irq_disabled(&desc->irq_data) || !desc->action) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) desc->istate |= IRQS_PENDING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) mask_ack_irq(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) kstat_incr_irqs_this_cpu(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) /* Start handling the irq */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) desc->irq_data.chip->irq_ack(&desc->irq_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) if (unlikely(!desc->action)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) mask_irq(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) * When another irq arrived while we were handling
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) * one, we could have masked the irq.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) * Renable it, if it was not disabled in meantime.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) if (unlikely(desc->istate & IRQS_PENDING)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) if (!irqd_irq_disabled(&desc->irq_data) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) irqd_irq_masked(&desc->irq_data))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) unmask_irq(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) handle_irq_event(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) } while ((desc->istate & IRQS_PENDING) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) !irqd_irq_disabled(&desc->irq_data));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) out_unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) raw_spin_unlock(&desc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) EXPORT_SYMBOL(handle_edge_irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) #ifdef CONFIG_IRQ_EDGE_EOI_HANDLER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) * handle_edge_eoi_irq - edge eoi type IRQ handler
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) * @desc: the interrupt description structure for this irq
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) * Similar as the above handle_edge_irq, but using eoi and w/o the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) * mask/unmask logic.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) void handle_edge_eoi_irq(struct irq_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) struct irq_chip *chip = irq_desc_get_chip(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) raw_spin_lock(&desc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) if (!irq_may_run(desc)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) desc->istate |= IRQS_PENDING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) goto out_eoi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) * If its disabled or no action available then mask it and get
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) * out of here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) if (irqd_irq_disabled(&desc->irq_data) || !desc->action) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) desc->istate |= IRQS_PENDING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) goto out_eoi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) kstat_incr_irqs_this_cpu(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) if (unlikely(!desc->action))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) goto out_eoi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) handle_irq_event(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) } while ((desc->istate & IRQS_PENDING) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) !irqd_irq_disabled(&desc->irq_data));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) out_eoi:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) chip->irq_eoi(&desc->irq_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) raw_spin_unlock(&desc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) * handle_percpu_irq - Per CPU local irq handler
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) * @desc: the interrupt description structure for this irq
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) * Per CPU interrupts on SMP machines without locking requirements
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) void handle_percpu_irq(struct irq_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) struct irq_chip *chip = irq_desc_get_chip(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) * PER CPU interrupts are not serialized. Do not touch
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) * desc->tot_count.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) __kstat_incr_irqs_this_cpu(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) if (chip->irq_ack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) chip->irq_ack(&desc->irq_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) handle_irq_event_percpu(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) if (chip->irq_eoi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) chip->irq_eoi(&desc->irq_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) * handle_percpu_devid_irq - Per CPU local irq handler with per cpu dev ids
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) * @desc: the interrupt description structure for this irq
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) * Per CPU interrupts on SMP machines without locking requirements. Same as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) * handle_percpu_irq() above but with the following extras:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) * action->percpu_dev_id is a pointer to percpu variables which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) * contain the real device id for the cpu on which this handler is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) * called
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) void handle_percpu_devid_irq(struct irq_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) struct irq_chip *chip = irq_desc_get_chip(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) struct irqaction *action = desc->action;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) unsigned int irq = irq_desc_get_irq(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) irqreturn_t res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) * PER CPU interrupts are not serialized. Do not touch
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) * desc->tot_count.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) __kstat_incr_irqs_this_cpu(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) if (chip->irq_ack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) chip->irq_ack(&desc->irq_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) if (likely(action)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) trace_irq_handler_entry(irq, action);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) res = action->handler(irq, raw_cpu_ptr(action->percpu_dev_id));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) trace_irq_handler_exit(irq, action, res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) unsigned int cpu = smp_processor_id();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) bool enabled = cpumask_test_cpu(cpu, desc->percpu_enabled);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) if (enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) irq_percpu_disable(desc, cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) pr_err_once("Spurious%s percpu IRQ%u on CPU%u\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) enabled ? " and unmasked" : "", irq, cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) if (chip->irq_eoi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) chip->irq_eoi(&desc->irq_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) * handle_percpu_devid_fasteoi_ipi - Per CPU local IPI handler with per cpu
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) * dev ids
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) * @desc: the interrupt description structure for this irq
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) * The biggest difference with the IRQ version is that the interrupt is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) * EOIed early, as the IPI could result in a context switch, and we need to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) * make sure the IPI can fire again. We also assume that the arch code has
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) * registered an action. If not, we are positively doomed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) void handle_percpu_devid_fasteoi_ipi(struct irq_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) struct irq_chip *chip = irq_desc_get_chip(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) struct irqaction *action = desc->action;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) unsigned int irq = irq_desc_get_irq(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) irqreturn_t res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) __kstat_incr_irqs_this_cpu(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) if (chip->irq_eoi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) chip->irq_eoi(&desc->irq_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) trace_irq_handler_entry(irq, action);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) res = action->handler(irq, raw_cpu_ptr(action->percpu_dev_id));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) trace_irq_handler_exit(irq, action, res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) * handle_percpu_devid_fasteoi_nmi - Per CPU local NMI handler with per cpu
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) * dev ids
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) * @desc: the interrupt description structure for this irq
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) * Similar to handle_fasteoi_nmi, but handling the dev_id cookie
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) * as a percpu pointer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) void handle_percpu_devid_fasteoi_nmi(struct irq_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) struct irq_chip *chip = irq_desc_get_chip(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) struct irqaction *action = desc->action;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) unsigned int irq = irq_desc_get_irq(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) irqreturn_t res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) __kstat_incr_irqs_this_cpu(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) trace_irq_handler_entry(irq, action);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) res = action->handler(irq, raw_cpu_ptr(action->percpu_dev_id));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) trace_irq_handler_exit(irq, action, res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) if (chip->irq_eoi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) chip->irq_eoi(&desc->irq_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) __irq_do_set_handler(struct irq_desc *desc, irq_flow_handler_t handle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019) int is_chained, const char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) if (!handle) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) handle = handle_bad_irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) struct irq_data *irq_data = &desc->irq_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) * With hierarchical domains we might run into a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) * situation where the outermost chip is not yet set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) * up, but the inner chips are there. Instead of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) * bailing we install the handler, but obviously we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) * cannot enable/startup the interrupt at this point.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) while (irq_data) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) if (irq_data->chip != &no_irq_chip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) * Bail out if the outer chip is not set up
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) * and the interrupt supposed to be started
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) * right away.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) if (WARN_ON(is_chained))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) /* Try the parent */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) irq_data = irq_data->parent_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) if (WARN_ON(!irq_data || irq_data->chip == &no_irq_chip))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) /* Uninstall? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) if (handle == handle_bad_irq) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) if (desc->irq_data.chip != &no_irq_chip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) mask_ack_irq(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) irq_state_set_disabled(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) if (is_chained)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) desc->action = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) desc->depth = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060) desc->handle_irq = handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) desc->name = name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) if (handle != handle_bad_irq && is_chained) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064) unsigned int type = irqd_get_trigger_type(&desc->irq_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) * We're about to start this interrupt immediately,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068) * hence the need to set the trigger configuration.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) * But the .set_type callback may have overridden the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) * flow handler, ignoring that we're dealing with a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071) * chained interrupt. Reset it immediately because we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) * do know better.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) if (type != IRQ_TYPE_NONE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) __irq_set_trigger(desc, type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) desc->handle_irq = handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) irq_settings_set_noprobe(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) irq_settings_set_norequest(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081) irq_settings_set_nothread(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082) desc->action = &chained_action;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) irq_activate_and_startup(desc, IRQ_RESEND);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) __irq_set_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) const char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) struct irq_desc *desc = irq_get_desc_buslock(irq, &flags, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094) if (!desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) __irq_do_set_handler(desc, handle, is_chained, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) irq_put_desc_busunlock(desc, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100) EXPORT_SYMBOL_GPL(__irq_set_handler);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102) void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) irq_set_chained_handler_and_data(unsigned int irq, irq_flow_handler_t handle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) struct irq_desc *desc = irq_get_desc_buslock(irq, &flags, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) if (!desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112) desc->irq_common_data.handler_data = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113) __irq_do_set_handler(desc, handle, 1, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115) irq_put_desc_busunlock(desc, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) EXPORT_SYMBOL_GPL(irq_set_chained_handler_and_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120) irq_set_chip_and_handler_name(unsigned int irq, struct irq_chip *chip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121) irq_flow_handler_t handle, const char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123) irq_set_chip(irq, chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) __irq_set_handler(irq, handle, 0, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126) EXPORT_SYMBOL_GPL(irq_set_chip_and_handler_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128) void __irq_modify_status(unsigned int irq, unsigned long clr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) unsigned long set, unsigned long mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131) unsigned long flags, trigger, tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132) struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134) if (!desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138) * Warn when a driver sets the no autoenable flag on an already
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139) * active interrupt.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141) WARN_ON_ONCE(!desc->depth && (set & _IRQ_NOAUTOEN));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143) /* Warn when trying to clear or set a bit disallowed by the mask */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144) WARN_ON((clr | set) & ~mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145) __irq_settings_clr_and_set(desc, clr, set, mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) trigger = irqd_get_trigger_type(&desc->irq_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149) irqd_clear(&desc->irq_data, IRQD_NO_BALANCING | IRQD_PER_CPU |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150) IRQD_TRIGGER_MASK | IRQD_LEVEL | IRQD_MOVE_PCNTXT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151) if (irq_settings_has_no_balance_set(desc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152) irqd_set(&desc->irq_data, IRQD_NO_BALANCING);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153) if (irq_settings_is_per_cpu(desc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) irqd_set(&desc->irq_data, IRQD_PER_CPU);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) if (irq_settings_can_move_pcntxt(desc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156) irqd_set(&desc->irq_data, IRQD_MOVE_PCNTXT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157) if (irq_settings_is_level(desc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) irqd_set(&desc->irq_data, IRQD_LEVEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160) tmp = irq_settings_get_trigger_mask(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161) if (tmp != IRQ_TYPE_NONE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162) trigger = tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164) irqd_set(&desc->irq_data, trigger);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166) irq_put_desc_unlock(desc, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169) void irq_modify_status(unsigned int irq, unsigned long clr, unsigned long set)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171) __irq_modify_status(irq, clr, set, _IRQF_MODIFY_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173) EXPORT_SYMBOL_GPL(irq_modify_status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176) * irq_cpu_online - Invoke all irq_cpu_online functions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178) * Iterate through all irqs and invoke the chip.irq_cpu_online()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179) * for each.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181) void irq_cpu_online(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183) struct irq_desc *desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184) struct irq_chip *chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186) unsigned int irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188) for_each_active_irq(irq) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189) desc = irq_to_desc(irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190) if (!desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1193) raw_spin_lock_irqsave(&desc->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1195) chip = irq_data_get_irq_chip(&desc->irq_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1196) if (chip && chip->irq_cpu_online &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1197) (!(chip->flags & IRQCHIP_ONOFFLINE_ENABLED) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1198) !irqd_irq_disabled(&desc->irq_data)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1199) chip->irq_cpu_online(&desc->irq_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1201) raw_spin_unlock_irqrestore(&desc->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1202) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1203) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1205) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1206) * irq_cpu_offline - Invoke all irq_cpu_offline functions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1207) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1208) * Iterate through all irqs and invoke the chip.irq_cpu_offline()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1209) * for each.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1210) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1211) void irq_cpu_offline(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1212) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1213) struct irq_desc *desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1214) struct irq_chip *chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1215) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1216) unsigned int irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1218) for_each_active_irq(irq) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1219) desc = irq_to_desc(irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1220) if (!desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1221) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1223) raw_spin_lock_irqsave(&desc->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1225) chip = irq_data_get_irq_chip(&desc->irq_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1226) if (chip && chip->irq_cpu_offline &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1227) (!(chip->flags & IRQCHIP_ONOFFLINE_ENABLED) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1228) !irqd_irq_disabled(&desc->irq_data)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1229) chip->irq_cpu_offline(&desc->irq_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1231) raw_spin_unlock_irqrestore(&desc->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1232) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1233) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1235) #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1237) #ifdef CONFIG_IRQ_FASTEOI_HIERARCHY_HANDLERS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1238) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1239) * handle_fasteoi_ack_irq - irq handler for edge hierarchy
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1240) * stacked on transparent controllers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1241) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1242) * @desc: the interrupt description structure for this irq
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1243) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1244) * Like handle_fasteoi_irq(), but for use with hierarchy where
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1245) * the irq_chip also needs to have its ->irq_ack() function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1246) * called.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1247) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1248) void handle_fasteoi_ack_irq(struct irq_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1249) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1250) struct irq_chip *chip = desc->irq_data.chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1252) raw_spin_lock(&desc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1254) if (!irq_may_run(desc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1255) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1257) desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1259) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1260) * If its disabled or no action available
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1261) * then mask it and get out of here:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1262) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1263) if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1264) desc->istate |= IRQS_PENDING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1265) mask_irq(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1266) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1267) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1268)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1269) kstat_incr_irqs_this_cpu(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1270) if (desc->istate & IRQS_ONESHOT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1271) mask_irq(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1273) /* Start handling the irq */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1274) desc->irq_data.chip->irq_ack(&desc->irq_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1276) handle_irq_event(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1277)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1278) cond_unmask_eoi_irq(desc, chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1279)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1280) raw_spin_unlock(&desc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1281) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1282) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1283) if (!(chip->flags & IRQCHIP_EOI_IF_HANDLED))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1284) chip->irq_eoi(&desc->irq_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1285) raw_spin_unlock(&desc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1286) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1287) EXPORT_SYMBOL_GPL(handle_fasteoi_ack_irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1288)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1289) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1290) * handle_fasteoi_mask_irq - irq handler for level hierarchy
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1291) * stacked on transparent controllers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1292) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1293) * @desc: the interrupt description structure for this irq
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1294) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1295) * Like handle_fasteoi_irq(), but for use with hierarchy where
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1296) * the irq_chip also needs to have its ->irq_mask_ack() function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1297) * called.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1298) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1299) void handle_fasteoi_mask_irq(struct irq_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1300) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1301) struct irq_chip *chip = desc->irq_data.chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1303) raw_spin_lock(&desc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1304) mask_ack_irq(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1306) if (!irq_may_run(desc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1307) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1309) desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1310)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1311) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1312) * If its disabled or no action available
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1313) * then mask it and get out of here:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1314) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1315) if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1316) desc->istate |= IRQS_PENDING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1317) mask_irq(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1318) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1319) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1321) kstat_incr_irqs_this_cpu(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1322) if (desc->istate & IRQS_ONESHOT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1323) mask_irq(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1324)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1325) handle_irq_event(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1326)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1327) cond_unmask_eoi_irq(desc, chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1328)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1329) raw_spin_unlock(&desc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1330) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1331) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1332) if (!(chip->flags & IRQCHIP_EOI_IF_HANDLED))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1333) chip->irq_eoi(&desc->irq_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1334) raw_spin_unlock(&desc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1335) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1336) EXPORT_SYMBOL_GPL(handle_fasteoi_mask_irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1337)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1338) #endif /* CONFIG_IRQ_FASTEOI_HIERARCHY_HANDLERS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1339)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1340) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1341) * irq_chip_set_parent_state - set the state of a parent interrupt.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1342) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1343) * @data: Pointer to interrupt specific data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1344) * @which: State to be restored (one of IRQCHIP_STATE_*)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1345) * @val: Value corresponding to @which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1346) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1347) * Conditional success, if the underlying irqchip does not implement it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1348) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1349) int irq_chip_set_parent_state(struct irq_data *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1350) enum irqchip_irq_state which,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1351) bool val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1352) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1353) data = data->parent_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1354)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1355) if (!data || !data->chip->irq_set_irqchip_state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1356) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1358) return data->chip->irq_set_irqchip_state(data, which, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1359) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1360) EXPORT_SYMBOL_GPL(irq_chip_set_parent_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1362) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1363) * irq_chip_get_parent_state - get the state of a parent interrupt.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1364) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1365) * @data: Pointer to interrupt specific data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1366) * @which: one of IRQCHIP_STATE_* the caller wants to know
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1367) * @state: a pointer to a boolean where the state is to be stored
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1368) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1369) * Conditional success, if the underlying irqchip does not implement it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1370) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1371) int irq_chip_get_parent_state(struct irq_data *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1372) enum irqchip_irq_state which,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1373) bool *state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1374) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1375) data = data->parent_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1376)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1377) if (!data || !data->chip->irq_get_irqchip_state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1378) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1379)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1380) return data->chip->irq_get_irqchip_state(data, which, state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1381) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1382) EXPORT_SYMBOL_GPL(irq_chip_get_parent_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1383)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1384) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1385) * irq_chip_enable_parent - Enable the parent interrupt (defaults to unmask if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1386) * NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1387) * @data: Pointer to interrupt specific data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1388) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1389) void irq_chip_enable_parent(struct irq_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1390) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1391) data = data->parent_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1392) if (data->chip->irq_enable)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1393) data->chip->irq_enable(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1394) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1395) data->chip->irq_unmask(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1396) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1397) EXPORT_SYMBOL_GPL(irq_chip_enable_parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1398)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1399) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1400) * irq_chip_disable_parent - Disable the parent interrupt (defaults to mask if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1401) * NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1402) * @data: Pointer to interrupt specific data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1403) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1404) void irq_chip_disable_parent(struct irq_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1405) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1406) data = data->parent_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1407) if (data->chip->irq_disable)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1408) data->chip->irq_disable(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1409) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1410) data->chip->irq_mask(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1411) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1412) EXPORT_SYMBOL_GPL(irq_chip_disable_parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1413)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1414) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1415) * irq_chip_ack_parent - Acknowledge the parent interrupt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1416) * @data: Pointer to interrupt specific data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1417) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1418) void irq_chip_ack_parent(struct irq_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1419) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1420) data = data->parent_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1421) data->chip->irq_ack(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1422) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1423) EXPORT_SYMBOL_GPL(irq_chip_ack_parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1424)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1425) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1426) * irq_chip_mask_parent - Mask the parent interrupt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1427) * @data: Pointer to interrupt specific data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1428) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1429) void irq_chip_mask_parent(struct irq_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1430) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1431) data = data->parent_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1432) data->chip->irq_mask(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1433) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1434) EXPORT_SYMBOL_GPL(irq_chip_mask_parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1435)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1436) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1437) * irq_chip_mask_ack_parent - Mask and acknowledge the parent interrupt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1438) * @data: Pointer to interrupt specific data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1439) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1440) void irq_chip_mask_ack_parent(struct irq_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1441) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1442) data = data->parent_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1443) data->chip->irq_mask_ack(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1444) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1445) EXPORT_SYMBOL_GPL(irq_chip_mask_ack_parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1446)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1447) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1448) * irq_chip_unmask_parent - Unmask the parent interrupt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1449) * @data: Pointer to interrupt specific data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1450) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1451) void irq_chip_unmask_parent(struct irq_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1452) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1453) data = data->parent_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1454) data->chip->irq_unmask(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1455) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1456) EXPORT_SYMBOL_GPL(irq_chip_unmask_parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1457)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1458) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1459) * irq_chip_eoi_parent - Invoke EOI on the parent interrupt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1460) * @data: Pointer to interrupt specific data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1461) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1462) void irq_chip_eoi_parent(struct irq_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1463) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1464) data = data->parent_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1465) data->chip->irq_eoi(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1466) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1467) EXPORT_SYMBOL_GPL(irq_chip_eoi_parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1468)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1469) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1470) * irq_chip_set_affinity_parent - Set affinity on the parent interrupt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1471) * @data: Pointer to interrupt specific data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1472) * @dest: The affinity mask to set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1473) * @force: Flag to enforce setting (disable online checks)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1474) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1475) * Conditinal, as the underlying parent chip might not implement it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1476) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1477) int irq_chip_set_affinity_parent(struct irq_data *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1478) const struct cpumask *dest, bool force)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1479) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1480) data = data->parent_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1481) if (data->chip->irq_set_affinity)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1482) return data->chip->irq_set_affinity(data, dest, force);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1483)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1484) return -ENOSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1485) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1486) EXPORT_SYMBOL_GPL(irq_chip_set_affinity_parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1487)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1488) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1489) * irq_chip_set_type_parent - Set IRQ type on the parent interrupt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1490) * @data: Pointer to interrupt specific data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1491) * @type: IRQ_TYPE_{LEVEL,EDGE}_* value - see include/linux/irq.h
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1492) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1493) * Conditional, as the underlying parent chip might not implement it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1494) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1495) int irq_chip_set_type_parent(struct irq_data *data, unsigned int type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1496) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1497) data = data->parent_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1498)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1499) if (data->chip->irq_set_type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1500) return data->chip->irq_set_type(data, type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1501)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1502) return -ENOSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1503) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1504) EXPORT_SYMBOL_GPL(irq_chip_set_type_parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1505)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1506) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1507) * irq_chip_retrigger_hierarchy - Retrigger an interrupt in hardware
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1508) * @data: Pointer to interrupt specific data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1509) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1510) * Iterate through the domain hierarchy of the interrupt and check
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1511) * whether a hw retrigger function exists. If yes, invoke it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1512) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1513) int irq_chip_retrigger_hierarchy(struct irq_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1514) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1515) for (data = data->parent_data; data; data = data->parent_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1516) if (data->chip && data->chip->irq_retrigger)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1517) return data->chip->irq_retrigger(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1518)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1519) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1520) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1521) EXPORT_SYMBOL_GPL(irq_chip_retrigger_hierarchy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1522)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1523) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1524) * irq_chip_set_vcpu_affinity_parent - Set vcpu affinity on the parent interrupt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1525) * @data: Pointer to interrupt specific data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1526) * @vcpu_info: The vcpu affinity information
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1527) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1528) int irq_chip_set_vcpu_affinity_parent(struct irq_data *data, void *vcpu_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1529) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1530) data = data->parent_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1531) if (data->chip->irq_set_vcpu_affinity)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1532) return data->chip->irq_set_vcpu_affinity(data, vcpu_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1533)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1534) return -ENOSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1535) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1536) EXPORT_SYMBOL_GPL(irq_chip_set_vcpu_affinity_parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1537) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1538) * irq_chip_set_wake_parent - Set/reset wake-up on the parent interrupt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1539) * @data: Pointer to interrupt specific data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1540) * @on: Whether to set or reset the wake-up capability of this irq
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1541) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1542) * Conditional, as the underlying parent chip might not implement it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1543) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1544) int irq_chip_set_wake_parent(struct irq_data *data, unsigned int on)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1545) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1546) data = data->parent_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1547)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1548) if (data->chip->flags & IRQCHIP_SKIP_SET_WAKE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1549) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1550)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1551) if (data->chip->irq_set_wake)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1552) return data->chip->irq_set_wake(data, on);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1553)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1554) return -ENOSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1555) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1556) EXPORT_SYMBOL_GPL(irq_chip_set_wake_parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1557)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1558) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1559) * irq_chip_request_resources_parent - Request resources on the parent interrupt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1560) * @data: Pointer to interrupt specific data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1561) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1562) int irq_chip_request_resources_parent(struct irq_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1563) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1564) data = data->parent_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1565)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1566) if (data->chip->irq_request_resources)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1567) return data->chip->irq_request_resources(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1568)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1569) return -ENOSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1570) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1571) EXPORT_SYMBOL_GPL(irq_chip_request_resources_parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1572)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1573) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1574) * irq_chip_release_resources_parent - Release resources on the parent interrupt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1575) * @data: Pointer to interrupt specific data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1576) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1577) void irq_chip_release_resources_parent(struct irq_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1578) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1579) data = data->parent_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1580) if (data->chip->irq_release_resources)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1581) data->chip->irq_release_resources(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1582) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1583) EXPORT_SYMBOL_GPL(irq_chip_release_resources_parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1584) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1585)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1586) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1587) * irq_chip_compose_msi_msg - Componse msi message for a irq chip
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1588) * @data: Pointer to interrupt specific data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1589) * @msg: Pointer to the MSI message
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1590) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1591) * For hierarchical domains we find the first chip in the hierarchy
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1592) * which implements the irq_compose_msi_msg callback. For non
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1593) * hierarchical we use the top level chip.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1594) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1595) int irq_chip_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1596) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1597) struct irq_data *pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1598)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1599) for (pos = NULL; !pos && data; data = irqd_get_parent_data(data)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1600) if (data->chip && data->chip->irq_compose_msi_msg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1601) pos = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1602) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1603)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1604) if (!pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1605) return -ENOSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1606)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1607) pos->chip->irq_compose_msi_msg(pos, msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1608) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1609) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1610)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1611) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1612) * irq_chip_pm_get - Enable power for an IRQ chip
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1613) * @data: Pointer to interrupt specific data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1614) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1615) * Enable the power to the IRQ chip referenced by the interrupt data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1616) * structure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1617) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1618) int irq_chip_pm_get(struct irq_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1619) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1620) int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1621)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1622) if (IS_ENABLED(CONFIG_PM) && data->chip->parent_device) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1623) retval = pm_runtime_get_sync(data->chip->parent_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1624) if (retval < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1625) pm_runtime_put_noidle(data->chip->parent_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1626) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1627) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1628) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1629)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1630) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1631) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1632)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1633) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1634) * irq_chip_pm_put - Disable power for an IRQ chip
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1635) * @data: Pointer to interrupt specific data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1636) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1637) * Disable the power to the IRQ chip referenced by the interrupt data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1638) * structure, belongs. Note that power will only be disabled, once this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1639) * function has been called for all IRQs that have called irq_chip_pm_get().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1640) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1641) int irq_chip_pm_put(struct irq_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1642) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1643) int retval = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1644)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1645) if (IS_ENABLED(CONFIG_PM) && data->chip->parent_device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1646) retval = pm_runtime_put(data->chip->parent_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1647)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1648) return (retval < 0) ? retval : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1649) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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