mirror of
https://github.com/AetherDroid/android_kernel_samsung_on5xelte.git
synced 2025-09-08 17:18:05 -04:00
Fixed MTP to work with TWRP
This commit is contained in:
awab228
commit
f6dfaef42e
50820 changed files with 20846062 additions and 0 deletions
504
kernel/irq/proc.c
Normal file
504
kernel/irq/proc.c
Normal file
|
|
@ -0,0 +1,504 @@
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/*
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* linux/kernel/irq/proc.c
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*
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* Copyright (C) 1992, 1998-2004 Linus Torvalds, Ingo Molnar
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*
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* This file contains the /proc/irq/ handling code.
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*/
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#include <linux/irq.h>
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#include <linux/gfp.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/interrupt.h>
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#include <linux/kernel_stat.h>
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#include "internals.h"
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/*
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* Access rules:
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*
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* procfs protects read/write of /proc/irq/N/ files against a
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* concurrent free of the interrupt descriptor. remove_proc_entry()
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* immediately prevents new read/writes to happen and waits for
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* already running read/write functions to complete.
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*
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* We remove the proc entries first and then delete the interrupt
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* descriptor from the radix tree and free it. So it is guaranteed
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* that irq_to_desc(N) is valid as long as the read/writes are
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* permitted by procfs.
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*
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* The read from /proc/interrupts is a different problem because there
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* is no protection. So the lookup and the access to irqdesc
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* information must be protected by sparse_irq_lock.
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*/
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static struct proc_dir_entry *root_irq_dir;
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#ifdef CONFIG_SMP
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static int show_irq_affinity(int type, struct seq_file *m, void *v)
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{
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struct irq_desc *desc = irq_to_desc((long)m->private);
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const struct cpumask *mask = desc->irq_data.affinity;
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#ifdef CONFIG_GENERIC_PENDING_IRQ
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if (irqd_is_setaffinity_pending(&desc->irq_data))
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mask = desc->pending_mask;
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#endif
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if (type)
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seq_cpumask_list(m, mask);
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else
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seq_cpumask(m, mask);
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seq_putc(m, '\n');
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return 0;
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}
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static int irq_affinity_hint_proc_show(struct seq_file *m, void *v)
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{
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struct irq_desc *desc = irq_to_desc((long)m->private);
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unsigned long flags;
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cpumask_var_t mask;
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if (!zalloc_cpumask_var(&mask, GFP_KERNEL))
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return -ENOMEM;
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raw_spin_lock_irqsave(&desc->lock, flags);
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if (desc->affinity_hint)
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cpumask_copy(mask, desc->affinity_hint);
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raw_spin_unlock_irqrestore(&desc->lock, flags);
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seq_cpumask(m, mask);
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seq_putc(m, '\n');
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free_cpumask_var(mask);
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return 0;
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}
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#ifndef is_affinity_mask_valid
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#define is_affinity_mask_valid(val) 1
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#endif
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int no_irq_affinity;
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static int irq_affinity_proc_show(struct seq_file *m, void *v)
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{
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return show_irq_affinity(0, m, v);
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}
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static int irq_affinity_list_proc_show(struct seq_file *m, void *v)
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{
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return show_irq_affinity(1, m, v);
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}
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static ssize_t write_irq_affinity(int type, struct file *file,
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const char __user *buffer, size_t count, loff_t *pos)
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{
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unsigned int irq = (int)(long)PDE_DATA(file_inode(file));
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cpumask_var_t new_value;
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int err;
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if (!irq_can_set_affinity(irq) || no_irq_affinity)
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return -EIO;
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if (!alloc_cpumask_var(&new_value, GFP_KERNEL))
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return -ENOMEM;
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if (type)
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err = cpumask_parselist_user(buffer, count, new_value);
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else
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err = cpumask_parse_user(buffer, count, new_value);
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if (err)
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goto free_cpumask;
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if (!is_affinity_mask_valid(new_value)) {
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err = -EINVAL;
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goto free_cpumask;
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}
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/*
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* Do not allow disabling IRQs completely - it's a too easy
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* way to make the system unusable accidentally :-) At least
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* one online CPU still has to be targeted.
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*/
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if (!cpumask_intersects(new_value, cpu_online_mask)) {
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/* Special case for empty set - allow the architecture
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code to set default SMP affinity. */
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err = irq_select_affinity_usr(irq, new_value) ? -EINVAL : count;
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} else {
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irq_set_affinity(irq, new_value);
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err = count;
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}
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free_cpumask:
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free_cpumask_var(new_value);
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return err;
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}
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static ssize_t irq_affinity_proc_write(struct file *file,
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const char __user *buffer, size_t count, loff_t *pos)
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{
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return write_irq_affinity(0, file, buffer, count, pos);
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}
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static ssize_t irq_affinity_list_proc_write(struct file *file,
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const char __user *buffer, size_t count, loff_t *pos)
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{
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return write_irq_affinity(1, file, buffer, count, pos);
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}
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static int irq_affinity_proc_open(struct inode *inode, struct file *file)
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{
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return single_open(file, irq_affinity_proc_show, PDE_DATA(inode));
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}
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static int irq_affinity_list_proc_open(struct inode *inode, struct file *file)
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{
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return single_open(file, irq_affinity_list_proc_show, PDE_DATA(inode));
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}
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static int irq_affinity_hint_proc_open(struct inode *inode, struct file *file)
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{
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return single_open(file, irq_affinity_hint_proc_show, PDE_DATA(inode));
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}
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static const struct file_operations irq_affinity_proc_fops = {
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.open = irq_affinity_proc_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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.write = irq_affinity_proc_write,
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};
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static const struct file_operations irq_affinity_hint_proc_fops = {
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.open = irq_affinity_hint_proc_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static const struct file_operations irq_affinity_list_proc_fops = {
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.open = irq_affinity_list_proc_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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.write = irq_affinity_list_proc_write,
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};
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static int default_affinity_show(struct seq_file *m, void *v)
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{
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seq_cpumask(m, irq_default_affinity);
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seq_putc(m, '\n');
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return 0;
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}
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static ssize_t default_affinity_write(struct file *file,
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const char __user *buffer, size_t count, loff_t *ppos)
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{
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cpumask_var_t new_value;
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int err;
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if (!alloc_cpumask_var(&new_value, GFP_KERNEL))
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return -ENOMEM;
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err = cpumask_parse_user(buffer, count, new_value);
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if (err)
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goto out;
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if (!is_affinity_mask_valid(new_value)) {
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err = -EINVAL;
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goto out;
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}
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/*
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* Do not allow disabling IRQs completely - it's a too easy
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* way to make the system unusable accidentally :-) At least
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* one online CPU still has to be targeted.
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*/
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if (!cpumask_intersects(new_value, cpu_online_mask)) {
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err = -EINVAL;
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goto out;
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}
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cpumask_copy(irq_default_affinity, new_value);
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err = count;
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out:
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free_cpumask_var(new_value);
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return err;
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}
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static int default_affinity_open(struct inode *inode, struct file *file)
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{
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return single_open(file, default_affinity_show, PDE_DATA(inode));
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}
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static const struct file_operations default_affinity_proc_fops = {
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.open = default_affinity_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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.write = default_affinity_write,
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};
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static int irq_node_proc_show(struct seq_file *m, void *v)
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{
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struct irq_desc *desc = irq_to_desc((long) m->private);
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seq_printf(m, "%d\n", desc->irq_data.node);
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return 0;
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}
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static int irq_node_proc_open(struct inode *inode, struct file *file)
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{
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return single_open(file, irq_node_proc_show, PDE_DATA(inode));
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}
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static const struct file_operations irq_node_proc_fops = {
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.open = irq_node_proc_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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#endif
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static int irq_spurious_proc_show(struct seq_file *m, void *v)
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{
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struct irq_desc *desc = irq_to_desc((long) m->private);
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seq_printf(m, "count %u\n" "unhandled %u\n" "last_unhandled %u ms\n",
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desc->irq_count, desc->irqs_unhandled,
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jiffies_to_msecs(desc->last_unhandled));
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return 0;
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}
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static int irq_spurious_proc_open(struct inode *inode, struct file *file)
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{
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return single_open(file, irq_spurious_proc_show, PDE_DATA(inode));
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}
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static const struct file_operations irq_spurious_proc_fops = {
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.open = irq_spurious_proc_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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#define MAX_NAMELEN 128
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static int name_unique(unsigned int irq, struct irqaction *new_action)
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{
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struct irq_desc *desc = irq_to_desc(irq);
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struct irqaction *action;
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unsigned long flags;
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int ret = 1;
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raw_spin_lock_irqsave(&desc->lock, flags);
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for (action = desc->action ; action; action = action->next) {
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if ((action != new_action) && action->name &&
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!strcmp(new_action->name, action->name)) {
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ret = 0;
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break;
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}
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}
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raw_spin_unlock_irqrestore(&desc->lock, flags);
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return ret;
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}
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|
||||
void register_handler_proc(unsigned int irq, struct irqaction *action)
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||||
{
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||||
char name [MAX_NAMELEN];
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||||
struct irq_desc *desc = irq_to_desc(irq);
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||||
|
||||
if (!desc->dir || action->dir || !action->name ||
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||||
!name_unique(irq, action))
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||||
return;
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||||
|
||||
memset(name, 0, MAX_NAMELEN);
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||||
snprintf(name, MAX_NAMELEN, "%s", action->name);
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||||
|
||||
/* create /proc/irq/1234/handler/ */
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||||
action->dir = proc_mkdir(name, desc->dir);
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||||
}
|
||||
|
||||
#undef MAX_NAMELEN
|
||||
|
||||
#define MAX_NAMELEN 10
|
||||
|
||||
void register_irq_proc(unsigned int irq, struct irq_desc *desc)
|
||||
{
|
||||
char name [MAX_NAMELEN];
|
||||
|
||||
if (!root_irq_dir || (desc->irq_data.chip == &no_irq_chip) || desc->dir)
|
||||
return;
|
||||
|
||||
memset(name, 0, MAX_NAMELEN);
|
||||
sprintf(name, "%d", irq);
|
||||
|
||||
/* create /proc/irq/1234 */
|
||||
desc->dir = proc_mkdir(name, root_irq_dir);
|
||||
if (!desc->dir)
|
||||
return;
|
||||
|
||||
#ifdef CONFIG_SMP
|
||||
/* create /proc/irq/<irq>/smp_affinity */
|
||||
proc_create_data("smp_affinity", 0644, desc->dir,
|
||||
&irq_affinity_proc_fops, (void *)(long)irq);
|
||||
|
||||
/* create /proc/irq/<irq>/affinity_hint */
|
||||
proc_create_data("affinity_hint", 0444, desc->dir,
|
||||
&irq_affinity_hint_proc_fops, (void *)(long)irq);
|
||||
|
||||
/* create /proc/irq/<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);
|
||||
}
|
||||
|
||||
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);
|
||||
|
||||
memset(name, 0, MAX_NAMELEN);
|
||||
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) {
|
||||
if (!desc)
|
||||
continue;
|
||||
|
||||
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 && !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
|
||||
Loading…
Add table
Add a link
Reference in a new issue