^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) // Copyright 2017 Thomas Gleixner <tglx@linutronix.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) #include <linux/irqdomain.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #include <linux/irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include "internals.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) static struct dentry *irq_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) struct irq_bit_descr {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) unsigned int mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) char *name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #define BIT_MASK_DESCR(m) { .mask = m, .name = #m }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) static void irq_debug_show_bits(struct seq_file *m, int ind, unsigned int state,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) const struct irq_bit_descr *sd, int size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) for (i = 0; i < size; i++, sd++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) if (state & sd->mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) seq_printf(m, "%*s%s\n", ind + 12, "", sd->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) }
^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) #ifdef CONFIG_SMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) static void irq_debug_show_masks(struct seq_file *m, struct irq_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) struct irq_data *data = irq_desc_get_irq_data(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) struct cpumask *msk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) msk = irq_data_get_affinity_mask(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) seq_printf(m, "affinity: %*pbl\n", cpumask_pr_args(msk));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #ifdef CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) msk = irq_data_get_effective_affinity_mask(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) seq_printf(m, "effectiv: %*pbl\n", cpumask_pr_args(msk));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #ifdef CONFIG_GENERIC_PENDING_IRQ
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) msk = desc->pending_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) seq_printf(m, "pending: %*pbl\n", cpumask_pr_args(msk));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) static void irq_debug_show_masks(struct seq_file *m, struct irq_desc *desc) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) static const struct irq_bit_descr irqchip_flags[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) BIT_MASK_DESCR(IRQCHIP_SET_TYPE_MASKED),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) BIT_MASK_DESCR(IRQCHIP_EOI_IF_HANDLED),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) BIT_MASK_DESCR(IRQCHIP_MASK_ON_SUSPEND),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) BIT_MASK_DESCR(IRQCHIP_ONOFFLINE_ENABLED),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) BIT_MASK_DESCR(IRQCHIP_SKIP_SET_WAKE),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) BIT_MASK_DESCR(IRQCHIP_ONESHOT_SAFE),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) BIT_MASK_DESCR(IRQCHIP_EOI_THREADED),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) BIT_MASK_DESCR(IRQCHIP_SUPPORTS_LEVEL_MSI),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) BIT_MASK_DESCR(IRQCHIP_SUPPORTS_NMI),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) BIT_MASK_DESCR(IRQCHIP_ENABLE_WAKEUP_ON_SUSPEND),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) irq_debug_show_chip(struct seq_file *m, struct irq_data *data, int ind)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) struct irq_chip *chip = data->chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) if (!chip) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) seq_printf(m, "chip: None\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) seq_printf(m, "%*schip: %s\n", ind, "", chip->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) seq_printf(m, "%*sflags: 0x%lx\n", ind + 1, "", chip->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) irq_debug_show_bits(m, ind, chip->flags, irqchip_flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) ARRAY_SIZE(irqchip_flags));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) irq_debug_show_data(struct seq_file *m, struct irq_data *data, int ind)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) seq_printf(m, "%*sdomain: %s\n", ind, "",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) data->domain ? data->domain->name : "");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) seq_printf(m, "%*shwirq: 0x%lx\n", ind + 1, "", data->hwirq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) irq_debug_show_chip(m, data, ind + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) if (data->domain && data->domain->ops && data->domain->ops->debug_show)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) data->domain->ops->debug_show(m, NULL, data, ind + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) if (!data->parent_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) seq_printf(m, "%*sparent:\n", ind + 1, "");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) irq_debug_show_data(m, data->parent_data, ind + 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) static const struct irq_bit_descr irqdata_states[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) BIT_MASK_DESCR(IRQ_TYPE_EDGE_RISING),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) BIT_MASK_DESCR(IRQ_TYPE_EDGE_FALLING),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) BIT_MASK_DESCR(IRQ_TYPE_LEVEL_HIGH),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) BIT_MASK_DESCR(IRQ_TYPE_LEVEL_LOW),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) BIT_MASK_DESCR(IRQD_LEVEL),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) BIT_MASK_DESCR(IRQD_ACTIVATED),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) BIT_MASK_DESCR(IRQD_IRQ_STARTED),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) BIT_MASK_DESCR(IRQD_IRQ_DISABLED),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) BIT_MASK_DESCR(IRQD_IRQ_MASKED),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) BIT_MASK_DESCR(IRQD_IRQ_INPROGRESS),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) BIT_MASK_DESCR(IRQD_PER_CPU),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) BIT_MASK_DESCR(IRQD_NO_BALANCING),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) BIT_MASK_DESCR(IRQD_SINGLE_TARGET),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) BIT_MASK_DESCR(IRQD_MOVE_PCNTXT),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) BIT_MASK_DESCR(IRQD_AFFINITY_SET),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) BIT_MASK_DESCR(IRQD_SETAFFINITY_PENDING),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) BIT_MASK_DESCR(IRQD_AFFINITY_MANAGED),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) BIT_MASK_DESCR(IRQD_AFFINITY_ON_ACTIVATE),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) BIT_MASK_DESCR(IRQD_MANAGED_SHUTDOWN),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) BIT_MASK_DESCR(IRQD_CAN_RESERVE),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) BIT_MASK_DESCR(IRQD_MSI_NOMASK_QUIRK),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) BIT_MASK_DESCR(IRQD_FORWARDED_TO_VCPU),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) BIT_MASK_DESCR(IRQD_WAKEUP_STATE),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) BIT_MASK_DESCR(IRQD_WAKEUP_ARMED),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) BIT_MASK_DESCR(IRQD_DEFAULT_TRIGGER_SET),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) BIT_MASK_DESCR(IRQD_HANDLE_ENFORCE_IRQCTX),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) BIT_MASK_DESCR(IRQD_IRQ_ENABLED_ON_SUSPEND),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) static const struct irq_bit_descr irqdesc_states[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) BIT_MASK_DESCR(_IRQ_NOPROBE),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) BIT_MASK_DESCR(_IRQ_NOREQUEST),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) BIT_MASK_DESCR(_IRQ_NOTHREAD),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) BIT_MASK_DESCR(_IRQ_NOAUTOEN),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) BIT_MASK_DESCR(_IRQ_NESTED_THREAD),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) BIT_MASK_DESCR(_IRQ_PER_CPU_DEVID),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) BIT_MASK_DESCR(_IRQ_IS_POLLED),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) BIT_MASK_DESCR(_IRQ_DISABLE_UNLAZY),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) BIT_MASK_DESCR(_IRQ_HIDDEN),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) BIT_MASK_DESCR(_IRQ_RAW),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) static const struct irq_bit_descr irqdesc_istates[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) BIT_MASK_DESCR(IRQS_AUTODETECT),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) BIT_MASK_DESCR(IRQS_SPURIOUS_DISABLED),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) BIT_MASK_DESCR(IRQS_POLL_INPROGRESS),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) BIT_MASK_DESCR(IRQS_ONESHOT),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) BIT_MASK_DESCR(IRQS_REPLAY),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) BIT_MASK_DESCR(IRQS_WAITING),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) BIT_MASK_DESCR(IRQS_PENDING),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) BIT_MASK_DESCR(IRQS_SUSPENDED),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) BIT_MASK_DESCR(IRQS_NMI),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) static int irq_debug_show(struct seq_file *m, void *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) struct irq_desc *desc = m->private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) struct irq_data *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) raw_spin_lock_irq(&desc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) data = irq_desc_get_irq_data(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) seq_printf(m, "handler: %ps\n", desc->handle_irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) seq_printf(m, "device: %s\n", desc->dev_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) seq_printf(m, "status: 0x%08x\n", desc->status_use_accessors);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) irq_debug_show_bits(m, 0, desc->status_use_accessors, irqdesc_states,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) ARRAY_SIZE(irqdesc_states));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) seq_printf(m, "istate: 0x%08x\n", desc->istate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) irq_debug_show_bits(m, 0, desc->istate, irqdesc_istates,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) ARRAY_SIZE(irqdesc_istates));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) seq_printf(m, "ddepth: %u\n", desc->depth);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) seq_printf(m, "wdepth: %u\n", desc->wake_depth);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) seq_printf(m, "dstate: 0x%08x\n", irqd_get(data));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) irq_debug_show_bits(m, 0, irqd_get(data), irqdata_states,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) ARRAY_SIZE(irqdata_states));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) seq_printf(m, "node: %d\n", irq_data_get_node(data));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) irq_debug_show_masks(m, desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) irq_debug_show_data(m, data, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) raw_spin_unlock_irq(&desc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) static int irq_debug_open(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) return single_open(file, irq_debug_show, inode->i_private);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) static ssize_t irq_debug_write(struct file *file, const char __user *user_buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) size_t count, loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) struct irq_desc *desc = file_inode(file)->i_private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) char buf[8] = { 0, };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) size_t size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) size = min(sizeof(buf) - 1, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) if (copy_from_user(buf, user_buf, size))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) if (!strncmp(buf, "trigger", size)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) int err = irq_inject_interrupt(irq_desc_get_irq(desc));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) return err ? err : count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) static const struct file_operations dfs_irq_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) .open = irq_debug_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) .write = irq_debug_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) .read = seq_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) .llseek = seq_lseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) .release = single_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) void irq_debugfs_copy_devname(int irq, struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) struct irq_desc *desc = irq_to_desc(irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) const char *name = dev_name(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) if (name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) desc->dev_name = kstrdup(name, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) void irq_add_debugfs_entry(unsigned int irq, struct irq_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) char name [10];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) if (!irq_dir || !desc || desc->debugfs_file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) sprintf(name, "%d", irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) desc->debugfs_file = debugfs_create_file(name, 0644, irq_dir, desc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) &dfs_irq_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) static int __init irq_debugfs_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) struct dentry *root_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) int irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) root_dir = debugfs_create_dir("irq", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) irq_domain_debugfs_init(root_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) irq_dir = debugfs_create_dir("irqs", root_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) irq_lock_sparse();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) for_each_active_irq(irq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) irq_add_debugfs_entry(irq, irq_to_desc(irq));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) irq_unlock_sparse();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) __initcall(irq_debugfs_init);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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