/* * linux/kernel/irq/proc.c * * Copyright (C) 1992, 1998-2004 Linus Torvalds, Ingo Molnar * * This file contains the /proc/irq/ handling code. */ #include #include #include #include #include #include #include #include "internals.h" /* * Access rules: * * procfs protects read/write of /proc/irq/N/ files against a * concurrent free of the interrupt descriptor. remove_proc_entry() * immediately prevents new read/writes to happen and waits for * already running read/write functions to complete. * * We remove the proc entries first and then delete the interrupt * descriptor from the radix tree and free it. So it is guaranteed * that irq_to_desc(N) is valid as long as the read/writes are * permitted by procfs. * * The read from /proc/interrupts is a different problem because there * is no protection. So the lookup and the access to irqdesc * information must be protected by sparse_irq_lock. */ static struct proc_dir_entry *root_irq_dir; #ifdef CONFIG_SMP static int show_irq_affinity(int type, struct seq_file *m, void *v) { struct irq_desc *desc = irq_to_desc((long)m->private); const struct cpumask *mask = desc->irq_common_data.affinity; #ifdef CONFIG_GENERIC_PENDING_IRQ if (irqd_is_setaffinity_pending(&desc->irq_data)) mask = desc->pending_mask; #endif if (type) seq_printf(m, "%*pbl\n", cpumask_pr_args(mask)); else seq_printf(m, "%*pb\n", cpumask_pr_args(mask)); return 0; } static int irq_affinity_hint_proc_show(struct seq_file *m, void *v) { struct irq_desc *desc = irq_to_desc((long)m->private); unsigned long flags; cpumask_var_t mask; if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) return -ENOMEM; raw_spin_lock_irqsave(&desc->lock, flags); if (desc->affinity_hint) cpumask_copy(mask, desc->affinity_hint); raw_spin_unlock_irqrestore(&desc->lock, flags); seq_printf(m, "%*pb\n", cpumask_pr_args(mask)); free_cpumask_var(mask); return 0; } #ifndef is_affinity_mask_valid #define is_affinity_mask_valid(val) 1 #endif int no_irq_affinity; static int irq_affinity_proc_show(struct seq_file *m, void *v) { return show_irq_affinity(0, m, v); } static int irq_affinity_list_proc_show(struct seq_file *m, void *v) { return show_irq_affinity(1, m, v); } static ssize_t write_irq_affinity(int type, struct file *file, const char __user *buffer, size_t count, loff_t *pos) { unsigned int irq = (int)(long)PDE_DATA(file_inode(file)); cpumask_var_t new_value; int err; if (!irq_can_set_affinity_usr(irq) || no_irq_affinity) return -EIO; if (!alloc_cpumask_var(&new_value, GFP_KERNEL)) return -ENOMEM; if (type) err = cpumask_parselist_user(buffer, count, new_value); else err = cpumask_parse_user(buffer, count, new_value); if (err) goto free_cpumask; if (!is_affinity_mask_valid(new_value)) { err = -EINVAL; goto free_cpumask; } /* * Do not allow disabling IRQs completely - it's a too easy * way to make the system unusable accidentally :-) At least * one online CPU still has to be targeted. */ if (!cpumask_intersects(new_value, cpu_online_mask)) { /* Special case for empty set - allow the architecture code to set default SMP affinity. */ err = irq_select_affinity_usr(irq, new_value) ? -EINVAL : count; } else { irq_set_affinity(irq, new_value); err = count; } free_cpumask: free_cpumask_var(new_value); return err; } static ssize_t irq_affinity_proc_write(struct file *file, const char __user *buffer, size_t count, loff_t *pos) { return write_irq_affinity(0, file, buffer, count, pos); } static ssize_t irq_affinity_list_proc_write(struct file *file, const char __user *buffer, size_t count, loff_t *pos) { return write_irq_affinity(1, file, buffer, count, pos); } static int irq_affinity_proc_open(struct inode *inode, struct file *file) { return single_open(file, irq_affinity_proc_show, PDE_DATA(inode)); } static int irq_affinity_list_proc_open(struct inode *inode, struct file *file) { return single_open(file, irq_affinity_list_proc_show, PDE_DATA(inode)); } static int irq_affinity_hint_proc_open(struct inode *inode, struct file *file) { return single_open(file, irq_affinity_hint_proc_show, PDE_DATA(inode)); } static const struct file_operations irq_affinity_proc_fops = { .open = irq_affinity_proc_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, .write = irq_affinity_proc_write, }; static const struct file_operations irq_affinity_hint_proc_fops = { .open = irq_affinity_hint_proc_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, }; static const struct file_operations irq_affinity_list_proc_fops = { .open = irq_affinity_list_proc_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, .write = irq_affinity_list_proc_write, }; static int default_affinity_show(struct seq_file *m, void *v) { seq_printf(m, "%*pb\n", cpumask_pr_args(irq_default_affinity)); return 0; } static ssize_t default_affinity_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) { cpumask_var_t new_value; int err; if (!alloc_cpumask_var(&new_value, GFP_KERNEL)) return -ENOMEM; err = cpumask_parse_user(buffer, count, new_value); if (err) goto out; if (!is_affinity_mask_valid(new_value)) { err = -EINVAL; goto out; } /* * Do not allow disabling IRQs completely - it's a too easy * way to make the system unusable accidentally :-) At least * one online CPU still has to be targeted. */ if (!cpumask_intersects(new_value, cpu_online_mask)) { err = -EINVAL; goto out; } cpumask_copy(irq_default_affinity, new_value); err = count; out: free_cpumask_var(new_value); return err; } static int default_affinity_open(struct inode *inode, struct file *file) { return single_open(file, default_affinity_show, PDE_DATA(inode)); } static const struct file_operations default_affinity_proc_fops = { .open = default_affinity_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, .write = default_affinity_write, }; static int irq_node_proc_show(struct seq_file *m, void *v) { struct irq_desc *desc = irq_to_desc((long) m->private); seq_printf(m, "%d\n", irq_desc_get_node(desc)); return 0; } static int irq_node_proc_open(struct inode *inode, struct file *file) { return single_open(file, irq_node_proc_show, PDE_DATA(inode)); } static const struct file_operations irq_node_proc_fops = { .open = irq_node_proc_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, }; #endif static int irq_spurious_proc_show(struct seq_file *m, void *v) { struct irq_desc *desc = irq_to_desc((long) m->private); seq_printf(m, "count %u\n" "unhandled %u\n" "last_unhandled %u ms\n", desc->irq_count, desc->irqs_unhandled, jiffies_to_msecs(desc->last_unhandled)); return 0; } static int irq_spurious_proc_open(struct inode *inode, struct file *file) { return single_open(file, irq_spurious_proc_show, PDE_DATA(inode)); } static const struct file_operations irq_spurious_proc_fops = { .open = irq_spurious_proc_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, }; #define MAX_NAMELEN 128 static int name_unique(unsigned int irq, struct irqaction *new_action) { struct irq_desc *desc = irq_to_desc(irq); struct irqaction *action; unsigned long flags; int ret = 1; raw_spin_lock_irqsave(&desc->lock, flags); for_each_action_of_desc(desc, action) { if ((action != new_action) && action->name && !strcmp(new_action->name, action->name)) { ret = 0; break; } } raw_spin_unlock_irqrestore(&desc->lock, flags); return ret; } void register_handler_proc(unsigned int irq, struct irqaction *action) { char name [MAX_NAMELEN]; struct irq_desc *desc = irq_to_desc(irq); if (!desc->dir || action->dir || !action->name || !name_unique(irq, action)) return; snprintf(name, MAX_NAMELEN, "%s", action->name); /* create /proc/irq/1234/handler/ */ action->dir = proc_mkdir(name, desc->dir); } #undef MAX_NAMELEN #define MAX_NAMELEN 10 void register_irq_proc(unsigned int irq, struct irq_desc *desc) { static DEFINE_MUTEX(register_lock); char name [MAX_NAMELEN]; if (!root_irq_dir || (desc->irq_data.chip == &no_irq_chip)) return; /* * irq directories are registered only when a handler is * added, not when the descriptor is created, so multiple * tasks might try to register at the same time. */ mutex_lock(®ister_lock); if (desc->dir) goto out_unlock; sprintf(name, "%d", irq); /* create /proc/irq/1234 */ desc->dir = proc_mkdir(name, root_irq_dir); if (!desc->dir) goto out_unlock; #ifdef CONFIG_SMP /* create /proc/irq//smp_affinity */ proc_create_data("smp_affinity", 0644, desc->dir, &irq_affinity_proc_fops, (void *)(long)irq); /* create /proc/irq//affinity_hint */ proc_create_data("affinity_hint", 0444, desc->dir, &irq_affinity_hint_proc_fops, (void *)(long)irq); /* create /proc/irq//smp_affinity_list */ proc_create_data("smp_affinity_list", 0644, desc->dir, &irq_affinity_list_proc_fops, (void *)(long)irq); proc_create_data("node", 0444, desc->dir, &irq_node_proc_fops, (void *)(long)irq); #endif proc_create_data("spurious", 0444, desc->dir, &irq_spurious_proc_fops, (void *)(long)irq); out_unlock: mutex_unlock(®ister_lock); } void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { char name [MAX_NAMELEN]; if (!root_irq_dir || !desc->dir) return; #ifdef CONFIG_SMP remove_proc_entry("smp_affinity", desc->dir); remove_proc_entry("affinity_hint", desc->dir); remove_proc_entry("smp_affinity_list", desc->dir); remove_proc_entry("node", desc->dir); #endif remove_proc_entry("spurious", desc->dir); sprintf(name, "%u", irq); remove_proc_entry(name, root_irq_dir); } #undef MAX_NAMELEN void unregister_handler_proc(unsigned int irq, struct irqaction *action) { proc_remove(action->dir); } static void register_default_affinity_proc(void) { #ifdef CONFIG_SMP proc_create("irq/default_smp_affinity", 0644, NULL, &default_affinity_proc_fops); #endif } void init_irq_proc(void) { unsigned int irq; struct irq_desc *desc; /* create /proc/irq */ root_irq_dir = proc_mkdir("irq", NULL); if (!root_irq_dir) return; register_default_affinity_proc(); /* * Create entries for all existing IRQs. */ for_each_irq_desc(irq, desc) register_irq_proc(irq, desc); } #ifdef CONFIG_GENERIC_IRQ_SHOW int __weak arch_show_interrupts(struct seq_file *p, int prec) { return 0; } #ifndef ACTUAL_NR_IRQS # define ACTUAL_NR_IRQS nr_irqs #endif int show_interrupts(struct seq_file *p, void *v) { static int prec; unsigned long flags, any_count = 0; int i = *(loff_t *) v, j; struct irqaction *action; struct irq_desc *desc; if (i > ACTUAL_NR_IRQS) return 0; if (i == ACTUAL_NR_IRQS) return arch_show_interrupts(p, prec); /* print header and calculate the width of the first column */ if (i == 0) { for (prec = 3, j = 1000; prec < 10 && j <= nr_irqs; ++prec) j *= 10; seq_printf(p, "%*s", prec + 8, ""); for_each_online_cpu(j) seq_printf(p, "CPU%-8d", j); seq_putc(p, '\n'); } irq_lock_sparse(); desc = irq_to_desc(i); if (!desc) goto outsparse; raw_spin_lock_irqsave(&desc->lock, flags); for_each_online_cpu(j) any_count |= kstat_irqs_cpu(i, j); action = desc->action; if ((!action || irq_desc_is_chained(desc)) && !any_count) goto out; seq_printf(p, "%*d: ", prec, i); for_each_online_cpu(j) seq_printf(p, "%10u ", kstat_irqs_cpu(i, j)); if (desc->irq_data.chip) { if (desc->irq_data.chip->irq_print_chip) desc->irq_data.chip->irq_print_chip(&desc->irq_data, p); else if (desc->irq_data.chip->name) seq_printf(p, " %8s", desc->irq_data.chip->name); else seq_printf(p, " %8s", "-"); } else { seq_printf(p, " %8s", "None"); } if (desc->irq_data.domain) seq_printf(p, " %*d", prec, (int) desc->irq_data.hwirq); #ifdef CONFIG_GENERIC_IRQ_SHOW_LEVEL seq_printf(p, " %-8s", irqd_is_level_type(&desc->irq_data) ? "Level" : "Edge"); #endif if (desc->name) seq_printf(p, "-%-8s", desc->name); if (action) { seq_printf(p, " %s", action->name); while ((action = action->next) != NULL) seq_printf(p, ", %s", action->name); } seq_putc(p, '\n'); out: raw_spin_unlock_irqrestore(&desc->lock, flags); outsparse: irq_unlock_sparse(); return 0; } #endif ux/net-next.git/tree/include/dt-bindings/clock/efm32-cmu.h?h=nds-private-remove&id=52f5631a4c056ad01682393be56d2be237e81610'>efm32-cmu.h1112logplain -rw-r--r--exynos-audss-clk.h597logplain -rw-r--r--exynos3250.h9083logplain -rw-r--r--exynos4.h8284logplain -rw-r--r--exynos4415.h9828logplain -rw-r--r--exynos5250.h4616logplain -rw-r--r--exynos5260-clk.h14876logplain -rw-r--r--exynos5410.h1689logplain -rw-r--r--exynos5420.h6857logplain -rw-r--r--exynos5433.h45372logplain -rw-r--r--exynos5440.h1141logplain -rw-r--r--exynos7-clk.h5281logplain -rw-r--r--gxbb-aoclkc.h2866logplain -rw-r--r--gxbb-clkc.h592logplain -rw-r--r--hi3516cv300-clock.h1668logplain -rw-r--r--hi3519-clock.h1328logplain -rw-r--r--hi3620-clock.h4496logplain -rw-r--r--hi6220-clock.h4508logplain -rw-r--r--hip04-clock.h1137logplain -rw-r--r--histb-clock.h2012logplain -rw-r--r--hix5hd2-clock.h2415logplain -rw-r--r--imx1-clock.h1055logplain -rw-r--r--imx21-clock.h2461logplain -rw-r--r--imx27-clock.h3494logplain -rw-r--r--imx5-clock.h7212logplain -rw-r--r--imx6qdl-clock.h9593logplain -rw-r--r--imx6sl-clock.h5849logplain -rw-r--r--imx6sx-clock.h9099logplain -rw-r--r--imx6ul-clock.h8203logplain -rw-r--r--imx7d-clock.h15974logplain -rw-r--r--jz4740-cgu.h1028logplain -rw-r--r--jz4780-cgu.h2470logplain -rw-r--r--lpc18xx-ccu.h2134logplain -rw-r--r--lpc18xx-cgu.h1142logplain -rw-r--r--lpc32xx-clock.h1633logplain -rw-r--r--lsi,axm5516-clks.h974logplain -rw-r--r--marvell,mmp2.h2022logplain -rw-r--r--marvell,pxa168.h1654logplain -rw-r--r--marvell,pxa1928.h1535logplain -rw-r--r--marvell,pxa910.h1598logplain -rw-r--r--maxim,max77620.h632logplain -rw-r--r--maxim,max77686.h648logplain -rw-r--r--maxim,max77802.h630logplain -rw-r--r--meson8b-clkc.h523logplain -rw-r--r--microchip,pic32-clock.h1150logplain -rw-r--r--mpc512x-clock.h2236logplain -rw-r--r--mt2701-clk.h13832logplain -rw-r--r--mt8135-clk.h5641logplain -rw-r--r--mt8173-clk.h9293logplain -rw-r--r--oxsemi,ox810se.h1002logplain -rw-r--r--oxsemi,ox820.h1203logplain -rw-r--r--pistachio-clk.h4863logplain -rw-r--r--pxa-clock.h1715logplain -rw-r--r--qcom,gcc-apq8084.h12872logplain -rw-r--r--qcom,gcc-ipq4019.h5423logplain -rw-r--r--qcom,gcc-ipq806x.h8574logplain -rw-r--r--qcom,gcc-mdm9615.h9497logplain -rw-r--r--qcom,gcc-msm8660.h7932logplain -rw-r--r--qcom,gcc-msm8916.h6190logplain -rw-r--r--qcom,gcc-msm8960.h9342logplain -rw-r--r--qcom,gcc-msm8974.h12340logplain -rw-r--r--qcom,gcc-msm8994.h4858logplain -rw-r--r--qcom,gcc-msm8996.h12575logplain -rw-r--r--qcom,lcc-ipq806x.h899logplain -rw-r--r--qcom,lcc-mdm9615.h1701logplain -rw-r--r--qcom,lcc-msm8960.h1616logplain -rw-r--r--qcom,mmcc-apq8084.h5722logplain -rw-r--r--qcom,mmcc-msm8960.h4109logplain -rw-r--r--qcom,mmcc-msm8974.h5223logplain -rw-r--r--qcom,mmcc-msm8996.h9403logplain -rw-r--r--qcom,rpmcc.h2101logplain -rw-r--r--r7s72100-clock.h1218logplain -rw-r--r--r8a73a4-clock.h1596logplain -rw-r--r--r8a7740-clock.h1992logplain -rw-r--r--r8a7743-cpg-mssr.h1269logplain -rw-r--r--r8a7745-cpg-mssr.h1298logplain -rw-r--r--r8a7778-clock.h1855logplain -rw-r--r--r8a7779-clock.h1647logplain -rw-r--r--r8a7790-clock.h4367logplain -rw-r--r--r8a7791-clock.h4388logplain -rw-r--r--r8a7792-clock.h2562logplain -rw-r--r--r8a7793-clock.h4561logplain -rw-r--r--r8a7794-clock.h3679logplain -rw-r--r--r8a7795-cpg-mssr.h1890logplain -rw-r--r--r8a7796-cpg-mssr.h2066logplain -rw-r--r--renesas-cpg-mssr.h542logplain -rw-r--r--rk1108-cru.h6605logplain -rw-r--r--rk3036-cru.h4584logplain -rw-r--r--rk3066a-cru.h1068logplain -rw-r--r--rk3188-cru-common.h6105logplain -rw-r--r--rk3188-cru.h1435logplain