2 * Copyright 2017 Thomas Gleixner <tglx@linutronix.de>
4 * This file is licensed under the GPL V2.
6 #include <linux/irqdomain.h>
11 static struct dentry *irq_dir;
13 struct irq_bit_descr {
17 #define BIT_MASK_DESCR(m) { .mask = m, .name = #m }
19 static void irq_debug_show_bits(struct seq_file *m, int ind, unsigned int state,
20 const struct irq_bit_descr *sd, int size)
24 for (i = 0; i < size; i++, sd++) {
26 seq_printf(m, "%*s%s\n", ind + 12, "", sd->name);
31 static void irq_debug_show_masks(struct seq_file *m, struct irq_desc *desc)
33 struct irq_data *data = irq_desc_get_irq_data(desc);
36 msk = irq_data_get_affinity_mask(data);
37 seq_printf(m, "affinity: %*pbl\n", cpumask_pr_args(msk));
38 #ifdef CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK
39 msk = irq_data_get_effective_affinity_mask(data);
40 seq_printf(m, "effectiv: %*pbl\n", cpumask_pr_args(msk));
42 #ifdef CONFIG_GENERIC_PENDING_IRQ
43 msk = desc->pending_mask;
44 seq_printf(m, "pending: %*pbl\n", cpumask_pr_args(msk));
48 static void irq_debug_show_masks(struct seq_file *m, struct irq_desc *desc) { }
51 static const struct irq_bit_descr irqchip_flags[] = {
52 BIT_MASK_DESCR(IRQCHIP_SET_TYPE_MASKED),
53 BIT_MASK_DESCR(IRQCHIP_EOI_IF_HANDLED),
54 BIT_MASK_DESCR(IRQCHIP_MASK_ON_SUSPEND),
55 BIT_MASK_DESCR(IRQCHIP_ONOFFLINE_ENABLED),
56 BIT_MASK_DESCR(IRQCHIP_SKIP_SET_WAKE),
57 BIT_MASK_DESCR(IRQCHIP_ONESHOT_SAFE),
58 BIT_MASK_DESCR(IRQCHIP_EOI_THREADED),
62 irq_debug_show_chip(struct seq_file *m, struct irq_data *data, int ind)
64 struct irq_chip *chip = data->chip;
67 seq_printf(m, "chip: None\n");
70 seq_printf(m, "%*schip: %s\n", ind, "", chip->name);
71 seq_printf(m, "%*sflags: 0x%lx\n", ind + 1, "", chip->flags);
72 irq_debug_show_bits(m, ind, chip->flags, irqchip_flags,
73 ARRAY_SIZE(irqchip_flags));
77 irq_debug_show_data(struct seq_file *m, struct irq_data *data, int ind)
79 seq_printf(m, "%*sdomain: %s\n", ind, "",
80 data->domain ? data->domain->name : "");
81 seq_printf(m, "%*shwirq: 0x%lx\n", ind + 1, "", data->hwirq);
82 irq_debug_show_chip(m, data, ind + 1);
83 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
84 if (!data->parent_data)
86 seq_printf(m, "%*sparent:\n", ind + 1, "");
87 irq_debug_show_data(m, data->parent_data, ind + 4);
91 static const struct irq_bit_descr irqdata_states[] = {
92 BIT_MASK_DESCR(IRQ_TYPE_EDGE_RISING),
93 BIT_MASK_DESCR(IRQ_TYPE_EDGE_FALLING),
94 BIT_MASK_DESCR(IRQ_TYPE_LEVEL_HIGH),
95 BIT_MASK_DESCR(IRQ_TYPE_LEVEL_LOW),
96 BIT_MASK_DESCR(IRQD_LEVEL),
98 BIT_MASK_DESCR(IRQD_ACTIVATED),
99 BIT_MASK_DESCR(IRQD_IRQ_STARTED),
100 BIT_MASK_DESCR(IRQD_IRQ_DISABLED),
101 BIT_MASK_DESCR(IRQD_IRQ_MASKED),
102 BIT_MASK_DESCR(IRQD_IRQ_INPROGRESS),
104 BIT_MASK_DESCR(IRQD_PER_CPU),
105 BIT_MASK_DESCR(IRQD_NO_BALANCING),
107 BIT_MASK_DESCR(IRQD_SINGLE_TARGET),
108 BIT_MASK_DESCR(IRQD_MOVE_PCNTXT),
109 BIT_MASK_DESCR(IRQD_AFFINITY_SET),
110 BIT_MASK_DESCR(IRQD_SETAFFINITY_PENDING),
111 BIT_MASK_DESCR(IRQD_AFFINITY_MANAGED),
112 BIT_MASK_DESCR(IRQD_MANAGED_SHUTDOWN),
114 BIT_MASK_DESCR(IRQD_FORWARDED_TO_VCPU),
116 BIT_MASK_DESCR(IRQD_WAKEUP_STATE),
117 BIT_MASK_DESCR(IRQD_WAKEUP_ARMED),
120 static const struct irq_bit_descr irqdesc_states[] = {
121 BIT_MASK_DESCR(_IRQ_NOPROBE),
122 BIT_MASK_DESCR(_IRQ_NOREQUEST),
123 BIT_MASK_DESCR(_IRQ_NOTHREAD),
124 BIT_MASK_DESCR(_IRQ_NOAUTOEN),
125 BIT_MASK_DESCR(_IRQ_NESTED_THREAD),
126 BIT_MASK_DESCR(_IRQ_PER_CPU_DEVID),
127 BIT_MASK_DESCR(_IRQ_IS_POLLED),
128 BIT_MASK_DESCR(_IRQ_DISABLE_UNLAZY),
131 static const struct irq_bit_descr irqdesc_istates[] = {
132 BIT_MASK_DESCR(IRQS_AUTODETECT),
133 BIT_MASK_DESCR(IRQS_SPURIOUS_DISABLED),
134 BIT_MASK_DESCR(IRQS_POLL_INPROGRESS),
135 BIT_MASK_DESCR(IRQS_ONESHOT),
136 BIT_MASK_DESCR(IRQS_REPLAY),
137 BIT_MASK_DESCR(IRQS_WAITING),
138 BIT_MASK_DESCR(IRQS_PENDING),
139 BIT_MASK_DESCR(IRQS_SUSPENDED),
143 static int irq_debug_show(struct seq_file *m, void *p)
145 struct irq_desc *desc = m->private;
146 struct irq_data *data;
148 raw_spin_lock_irq(&desc->lock);
149 data = irq_desc_get_irq_data(desc);
150 seq_printf(m, "handler: %pf\n", desc->handle_irq);
151 seq_printf(m, "status: 0x%08x\n", desc->status_use_accessors);
152 irq_debug_show_bits(m, 0, desc->status_use_accessors, irqdesc_states,
153 ARRAY_SIZE(irqdesc_states));
154 seq_printf(m, "istate: 0x%08x\n", desc->istate);
155 irq_debug_show_bits(m, 0, desc->istate, irqdesc_istates,
156 ARRAY_SIZE(irqdesc_istates));
157 seq_printf(m, "ddepth: %u\n", desc->depth);
158 seq_printf(m, "wdepth: %u\n", desc->wake_depth);
159 seq_printf(m, "dstate: 0x%08x\n", irqd_get(data));
160 irq_debug_show_bits(m, 0, irqd_get(data), irqdata_states,
161 ARRAY_SIZE(irqdata_states));
162 seq_printf(m, "node: %d\n", irq_data_get_node(data));
163 irq_debug_show_masks(m, desc);
164 irq_debug_show_data(m, data, 0);
165 raw_spin_unlock_irq(&desc->lock);
169 static int irq_debug_open(struct inode *inode, struct file *file)
171 return single_open(file, irq_debug_show, inode->i_private);
174 static const struct file_operations dfs_irq_ops = {
175 .open = irq_debug_open,
178 .release = single_release,
181 void irq_add_debugfs_entry(unsigned int irq, struct irq_desc *desc)
185 if (!irq_dir || !desc || desc->debugfs_file)
188 sprintf(name, "%d", irq);
189 desc->debugfs_file = debugfs_create_file(name, 0444, irq_dir, desc,
193 static int __init irq_debugfs_init(void)
195 struct dentry *root_dir;
198 root_dir = debugfs_create_dir("irq", NULL);
202 irq_domain_debugfs_init(root_dir);
204 irq_dir = debugfs_create_dir("irqs", root_dir);
207 for_each_active_irq(irq)
208 irq_add_debugfs_entry(irq, irq_to_desc(irq));
213 __initcall(irq_debugfs_init);