1 // SPDX-License-Identifier: GPL-2.0
3  * Copyright (C) 1992, 1998-2004 Linus Torvalds, Ingo Molnar
12 #include <linux/interrupt.h>
22  * concurrent free of the interrupt descriptor. remove_proc_entry()
26  * We remove the proc entries first and then delete the interrupt
40 	AFFINITY,  enumerator
48 	struct irq_desc *desc = irq_to_desc((long)m->private);  in show_irq_affinity()
52 	case AFFINITY:  in show_irq_affinity()
54 		mask = desc->irq_common_data.affinity;  in show_irq_affinity()
56 		if (irqd_is_setaffinity_pending(&desc->irq_data))  in show_irq_affinity()
57 			mask = desc->pending_mask;  in show_irq_affinity()
63 		mask = irq_data_get_effective_affinity_mask(&desc->irq_data);  in show_irq_affinity()
67 		return -EINVAL;  in show_irq_affinity()
75 	case AFFINITY:  in show_irq_affinity()
85 	struct irq_desc *desc = irq_to_desc((long)m->private);  in irq_affinity_hint_proc_show()
90 		return -ENOMEM;  in irq_affinity_hint_proc_show()
92 	raw_spin_lock_irqsave(&desc->lock, flags);  in irq_affinity_hint_proc_show()
93 	if (desc->affinity_hint)  in irq_affinity_hint_proc_show()
94 		cpumask_copy(mask, desc->affinity_hint);  in irq_affinity_hint_proc_show()
95 	raw_spin_unlock_irqrestore(&desc->lock, flags);  in irq_affinity_hint_proc_show()
106 	return show_irq_affinity(AFFINITY, m);  in irq_affinity_proc_show()
118 	 * If the interrupt is started up already then this fails. The  in irq_select_affinity_usr()
119 	 * interrupt is assigned to an online CPU already. There is no  in irq_select_affinity_usr()
123 	 * If not then any change to the affinity is pointless because the  in irq_select_affinity_usr()
127 	return -EINVAL;  in irq_select_affinity_usr()
130 /* ALPHA magic affinity auto selector. Keep it for historical reasons. */
145 		return -EIO;  in write_irq_affinity()
148 		return -ENOMEM;  in write_irq_affinity()
158 	 * Do not allow disabling IRQs completely - it's a too easy  in write_irq_affinity()
159 	 * way to make the system unusable accidentally :-) At least  in write_irq_affinity()
164 		 * Special case for empty set - allow the architecture code  in write_irq_affinity()
165 		 * to set default SMP affinity.  in write_irq_affinity()
167 		err = irq_select_affinity_usr(irq) ? -EINVAL : count;  in write_irq_affinity()
242 		return -ENOMEM;  in default_affinity_write()
249 	 * Do not allow disabling IRQs completely - it's a too easy  in default_affinity_write()
250 	 * way to make the system unusable accidentally :-) At least  in default_affinity_write()
254 		err = -EINVAL;  in default_affinity_write()
281 	struct irq_desc *desc = irq_to_desc((long) m->private);  in irq_node_proc_show()
290 	struct irq_desc *desc = irq_to_desc((long) m->private);  in irq_spurious_proc_show()
293 		   desc->irq_count, desc->irqs_unhandled,  in irq_spurious_proc_show()
294 		   jiffies_to_msecs(desc->last_unhandled));  in irq_spurious_proc_show()
307 	raw_spin_lock_irqsave(&desc->lock, flags);  in name_unique()
309 		if ((action != new_action) && action->name &&  in name_unique()
310 				!strcmp(new_action->name, action->name)) {  in name_unique()
315 	raw_spin_unlock_irqrestore(&desc->lock, flags);  in name_unique()
324 	if (!desc->dir || action->dir || !action->name ||  in register_handler_proc()
328 	snprintf(name, MAX_NAMELEN, "%s", action->name);  in register_handler_proc()
331 	action->dir = proc_mkdir(name, desc->dir);  in register_handler_proc()
344 	if (!root_irq_dir || (desc->irq_data.chip == &no_irq_chip))  in register_irq_proc()
354 	if (desc->dir)  in register_irq_proc()
360 	desc->dir = proc_mkdir(name, root_irq_dir);  in register_irq_proc()
361 	if (!desc->dir)  in register_irq_proc()
366 	proc_create_data("smp_affinity", 0644, desc->dir,  in register_irq_proc()
370 	proc_create_single_data("affinity_hint", 0444, desc->dir,  in register_irq_proc()
374 	proc_create_data("smp_affinity_list", 0644, desc->dir,  in register_irq_proc()
377 	proc_create_single_data("node", 0444, desc->dir, irq_node_proc_show,  in register_irq_proc()
380 	proc_create_single_data("effective_affinity", 0444, desc->dir,  in register_irq_proc()
382 	proc_create_single_data("effective_affinity_list", 0444, desc->dir,  in register_irq_proc()
386 	proc_create_single_data("spurious", 0444, desc->dir,  in register_irq_proc()
397 	if (!root_irq_dir || !desc->dir)  in unregister_irq_proc()
400 	remove_proc_entry("smp_affinity", desc->dir);  in unregister_irq_proc()
401 	remove_proc_entry("affinity_hint", desc->dir);  in unregister_irq_proc()
402 	remove_proc_entry("smp_affinity_list", desc->dir);  in unregister_irq_proc()
403 	remove_proc_entry("node", desc->dir);  in unregister_irq_proc()
405 	remove_proc_entry("effective_affinity", desc->dir);  in unregister_irq_proc()
406 	remove_proc_entry("effective_affinity_list", desc->dir);  in unregister_irq_proc()
409 	remove_proc_entry("spurious", desc->dir);  in unregister_irq_proc()
419 	proc_remove(action->dir);  in unregister_handler_proc()
482 			seq_printf(p, "CPU%-8d", j);  in show_interrupts()
491 	if (desc->kstat_irqs) {  in show_interrupts()
493 			any_count |= data_race(*per_cpu_ptr(desc->kstat_irqs, j));  in show_interrupts()
496 	if ((!desc->action || irq_desc_is_chained(desc)) && !any_count)  in show_interrupts()
501 		seq_printf(p, "%10u ", desc->kstat_irqs ?  in show_interrupts()
502 					*per_cpu_ptr(desc->kstat_irqs, j) : 0);  in show_interrupts()
504 	raw_spin_lock_irqsave(&desc->lock, flags);  in show_interrupts()
505 	if (desc->irq_data.chip) {  in show_interrupts()
506 		if (desc->irq_data.chip->irq_print_chip)  in show_interrupts()
507 			desc->irq_data.chip->irq_print_chip(&desc->irq_data, p);  in show_interrupts()
508 		else if (desc->irq_data.chip->name)  in show_interrupts()
509 			seq_printf(p, " %8s", desc->irq_data.chip->name);  in show_interrupts()
511 			seq_printf(p, " %8s", "-");  in show_interrupts()
515 	if (desc->irq_data.domain)  in show_interrupts()
516 		seq_printf(p, " %*lu", prec, desc->irq_data.hwirq);  in show_interrupts()
520 	seq_printf(p, " %-8s", irqd_is_level_type(&desc->irq_data) ? "Level" : "Edge");  in show_interrupts()
522 	if (desc->name)  in show_interrupts()
523 		seq_printf(p, "-%-8s", desc->name);  in show_interrupts()
525 	action = desc->action;  in show_interrupts()
527 		seq_printf(p, "  %s", action->name);  in show_interrupts()
528 		while ((action = action->next) != NULL)  in show_interrupts()
529 			seq_printf(p, ", %s", action->name);  in show_interrupts()
533 	raw_spin_unlock_irqrestore(&desc->lock, flags);  in show_interrupts()