![Randy Dunlap](/assets/img/avatar_default.png)
Fix more android ram_console printk format warnings: drivers/staging/android/ram_console.c:238: warning: format '%d' expects type 'int', but argument 3 has type 'size_t' drivers/staging/android/ram_console.c:238: warning: format '%d' expects type 'int', but argument 4 has type 'size_t' Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
410 lines
11 KiB
C
410 lines
11 KiB
C
/* drivers/android/ram_console.c
|
|
*
|
|
* Copyright (C) 2007-2008 Google, Inc.
|
|
*
|
|
* This software is licensed under the terms of the GNU General Public
|
|
* License version 2, as published by the Free Software Foundation, and
|
|
* may be copied, distributed, and modified under those terms.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
*/
|
|
|
|
#include <linux/console.h>
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/proc_fs.h>
|
|
#include <linux/string.h>
|
|
#include <linux/uaccess.h>
|
|
#include <asm/io.h>
|
|
|
|
#ifdef CONFIG_ANDROID_RAM_CONSOLE_ERROR_CORRECTION
|
|
#include <linux/rslib.h>
|
|
#endif
|
|
|
|
struct ram_console_buffer {
|
|
uint32_t sig;
|
|
uint32_t start;
|
|
uint32_t size;
|
|
uint8_t data[0];
|
|
};
|
|
|
|
#define RAM_CONSOLE_SIG (0x43474244) /* DBGC */
|
|
|
|
#ifdef CONFIG_ANDROID_RAM_CONSOLE_EARLY_INIT
|
|
static char __initdata
|
|
ram_console_old_log_init_buffer[CONFIG_ANDROID_RAM_CONSOLE_EARLY_SIZE];
|
|
#endif
|
|
static char *ram_console_old_log;
|
|
static size_t ram_console_old_log_size;
|
|
|
|
static struct ram_console_buffer *ram_console_buffer;
|
|
static size_t ram_console_buffer_size;
|
|
#ifdef CONFIG_ANDROID_RAM_CONSOLE_ERROR_CORRECTION
|
|
static char *ram_console_par_buffer;
|
|
static struct rs_control *ram_console_rs_decoder;
|
|
static int ram_console_corrected_bytes;
|
|
static int ram_console_bad_blocks;
|
|
#define ECC_BLOCK_SIZE CONFIG_ANDROID_RAM_CONSOLE_ERROR_CORRECTION_DATA_SIZE
|
|
#define ECC_SIZE CONFIG_ANDROID_RAM_CONSOLE_ERROR_CORRECTION_ECC_SIZE
|
|
#define ECC_SYMSIZE CONFIG_ANDROID_RAM_CONSOLE_ERROR_CORRECTION_SYMBOL_SIZE
|
|
#define ECC_POLY CONFIG_ANDROID_RAM_CONSOLE_ERROR_CORRECTION_POLYNOMIAL
|
|
#endif
|
|
|
|
#ifdef CONFIG_ANDROID_RAM_CONSOLE_ERROR_CORRECTION
|
|
static void ram_console_encode_rs8(uint8_t *data, size_t len, uint8_t *ecc)
|
|
{
|
|
int i;
|
|
uint16_t par[ECC_SIZE];
|
|
/* Initialize the parity buffer */
|
|
memset(par, 0, sizeof(par));
|
|
encode_rs8(ram_console_rs_decoder, data, len, par, 0);
|
|
for (i = 0; i < ECC_SIZE; i++)
|
|
ecc[i] = par[i];
|
|
}
|
|
|
|
static int ram_console_decode_rs8(void *data, size_t len, uint8_t *ecc)
|
|
{
|
|
int i;
|
|
uint16_t par[ECC_SIZE];
|
|
for (i = 0; i < ECC_SIZE; i++)
|
|
par[i] = ecc[i];
|
|
return decode_rs8(ram_console_rs_decoder, data, par, len,
|
|
NULL, 0, NULL, 0, NULL);
|
|
}
|
|
#endif
|
|
|
|
static void ram_console_update(const char *s, unsigned int count)
|
|
{
|
|
struct ram_console_buffer *buffer = ram_console_buffer;
|
|
#ifdef CONFIG_ANDROID_RAM_CONSOLE_ERROR_CORRECTION
|
|
uint8_t *buffer_end = buffer->data + ram_console_buffer_size;
|
|
uint8_t *block;
|
|
uint8_t *par;
|
|
int size = ECC_BLOCK_SIZE;
|
|
#endif
|
|
memcpy(buffer->data + buffer->start, s, count);
|
|
#ifdef CONFIG_ANDROID_RAM_CONSOLE_ERROR_CORRECTION
|
|
block = buffer->data + (buffer->start & ~(ECC_BLOCK_SIZE - 1));
|
|
par = ram_console_par_buffer +
|
|
(buffer->start / ECC_BLOCK_SIZE) * ECC_SIZE;
|
|
do {
|
|
if (block + ECC_BLOCK_SIZE > buffer_end)
|
|
size = buffer_end - block;
|
|
ram_console_encode_rs8(block, size, par);
|
|
block += ECC_BLOCK_SIZE;
|
|
par += ECC_SIZE;
|
|
} while (block < buffer->data + buffer->start + count);
|
|
#endif
|
|
}
|
|
|
|
static void ram_console_update_header(void)
|
|
{
|
|
#ifdef CONFIG_ANDROID_RAM_CONSOLE_ERROR_CORRECTION
|
|
struct ram_console_buffer *buffer = ram_console_buffer;
|
|
uint8_t *par;
|
|
par = ram_console_par_buffer +
|
|
DIV_ROUND_UP(ram_console_buffer_size, ECC_BLOCK_SIZE) * ECC_SIZE;
|
|
ram_console_encode_rs8((uint8_t *)buffer, sizeof(*buffer), par);
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
ram_console_write(struct console *console, const char *s, unsigned int count)
|
|
{
|
|
int rem;
|
|
struct ram_console_buffer *buffer = ram_console_buffer;
|
|
|
|
if (count > ram_console_buffer_size) {
|
|
s += count - ram_console_buffer_size;
|
|
count = ram_console_buffer_size;
|
|
}
|
|
rem = ram_console_buffer_size - buffer->start;
|
|
if (rem < count) {
|
|
ram_console_update(s, rem);
|
|
s += rem;
|
|
count -= rem;
|
|
buffer->start = 0;
|
|
buffer->size = ram_console_buffer_size;
|
|
}
|
|
ram_console_update(s, count);
|
|
|
|
buffer->start += count;
|
|
if (buffer->size < ram_console_buffer_size)
|
|
buffer->size += count;
|
|
ram_console_update_header();
|
|
}
|
|
|
|
static struct console ram_console = {
|
|
.name = "ram",
|
|
.write = ram_console_write,
|
|
.flags = CON_PRINTBUFFER | CON_ENABLED,
|
|
.index = -1,
|
|
};
|
|
|
|
static void __init
|
|
ram_console_save_old(struct ram_console_buffer *buffer, char *dest)
|
|
{
|
|
size_t old_log_size = buffer->size;
|
|
#ifdef CONFIG_ANDROID_RAM_CONSOLE_ERROR_CORRECTION
|
|
uint8_t *block;
|
|
uint8_t *par;
|
|
char strbuf[80];
|
|
int strbuf_len;
|
|
|
|
block = buffer->data;
|
|
par = ram_console_par_buffer;
|
|
while (block < buffer->data + buffer->size) {
|
|
int numerr;
|
|
int size = ECC_BLOCK_SIZE;
|
|
if (block + size > buffer->data + ram_console_buffer_size)
|
|
size = buffer->data + ram_console_buffer_size - block;
|
|
numerr = ram_console_decode_rs8(block, size, par);
|
|
if (numerr > 0) {
|
|
#if 0
|
|
printk(KERN_INFO "ram_console: error in block %p, %d\n",
|
|
block, numerr);
|
|
#endif
|
|
ram_console_corrected_bytes += numerr;
|
|
} else if (numerr < 0) {
|
|
#if 0
|
|
printk(KERN_INFO "ram_console: uncorrectable error in "
|
|
"block %p\n", block);
|
|
#endif
|
|
ram_console_bad_blocks++;
|
|
}
|
|
block += ECC_BLOCK_SIZE;
|
|
par += ECC_SIZE;
|
|
}
|
|
if (ram_console_corrected_bytes || ram_console_bad_blocks)
|
|
strbuf_len = snprintf(strbuf, sizeof(strbuf),
|
|
"\n%d Corrected bytes, %d unrecoverable blocks\n",
|
|
ram_console_corrected_bytes, ram_console_bad_blocks);
|
|
else
|
|
strbuf_len = snprintf(strbuf, sizeof(strbuf),
|
|
"\nNo errors detected\n");
|
|
if (strbuf_len >= sizeof(strbuf))
|
|
strbuf_len = sizeof(strbuf) - 1;
|
|
old_log_size += strbuf_len;
|
|
#endif
|
|
|
|
if (dest == NULL) {
|
|
dest = kmalloc(old_log_size, GFP_KERNEL);
|
|
if (dest == NULL) {
|
|
printk(KERN_ERR
|
|
"ram_console: failed to allocate buffer\n");
|
|
return;
|
|
}
|
|
}
|
|
|
|
ram_console_old_log = dest;
|
|
ram_console_old_log_size = old_log_size;
|
|
memcpy(ram_console_old_log,
|
|
&buffer->data[buffer->start], buffer->size - buffer->start);
|
|
memcpy(ram_console_old_log + buffer->size - buffer->start,
|
|
&buffer->data[0], buffer->start);
|
|
#ifdef CONFIG_ANDROID_RAM_CONSOLE_ERROR_CORRECTION
|
|
memcpy(ram_console_old_log + old_log_size - strbuf_len,
|
|
strbuf, strbuf_len);
|
|
#endif
|
|
}
|
|
|
|
static int __init ram_console_init(struct ram_console_buffer *buffer,
|
|
size_t buffer_size, char *old_buf)
|
|
{
|
|
#ifdef CONFIG_ANDROID_RAM_CONSOLE_ERROR_CORRECTION
|
|
int numerr;
|
|
uint8_t *par;
|
|
#endif
|
|
ram_console_buffer = buffer;
|
|
ram_console_buffer_size =
|
|
buffer_size - sizeof(struct ram_console_buffer);
|
|
|
|
if (ram_console_buffer_size > buffer_size) {
|
|
pr_err("ram_console: buffer %p, invalid size %zu, datasize %zu\n",
|
|
buffer, buffer_size, ram_console_buffer_size);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_ANDROID_RAM_CONSOLE_ERROR_CORRECTION
|
|
ram_console_buffer_size -= (DIV_ROUND_UP(ram_console_buffer_size,
|
|
ECC_BLOCK_SIZE) + 1) * ECC_SIZE;
|
|
|
|
if (ram_console_buffer_size > buffer_size) {
|
|
pr_err("ram_console: buffer %p, invalid size %zu, "
|
|
"non-ecc datasize %zu\n",
|
|
buffer, buffer_size, ram_console_buffer_size);
|
|
return 0;
|
|
}
|
|
|
|
ram_console_par_buffer = buffer->data + ram_console_buffer_size;
|
|
|
|
|
|
/* first consecutive root is 0
|
|
* primitive element to generate roots = 1
|
|
*/
|
|
ram_console_rs_decoder = init_rs(ECC_SYMSIZE, ECC_POLY, 0, 1, ECC_SIZE);
|
|
if (ram_console_rs_decoder == NULL) {
|
|
printk(KERN_INFO "ram_console: init_rs failed\n");
|
|
return 0;
|
|
}
|
|
|
|
ram_console_corrected_bytes = 0;
|
|
ram_console_bad_blocks = 0;
|
|
|
|
par = ram_console_par_buffer +
|
|
DIV_ROUND_UP(ram_console_buffer_size, ECC_BLOCK_SIZE) * ECC_SIZE;
|
|
|
|
numerr = ram_console_decode_rs8(buffer, sizeof(*buffer), par);
|
|
if (numerr > 0) {
|
|
printk(KERN_INFO "ram_console: error in header, %d\n", numerr);
|
|
ram_console_corrected_bytes += numerr;
|
|
} else if (numerr < 0) {
|
|
printk(KERN_INFO
|
|
"ram_console: uncorrectable error in header\n");
|
|
ram_console_bad_blocks++;
|
|
}
|
|
#endif
|
|
|
|
if (buffer->sig == RAM_CONSOLE_SIG) {
|
|
if (buffer->size > ram_console_buffer_size
|
|
|| buffer->start > buffer->size)
|
|
printk(KERN_INFO "ram_console: found existing invalid "
|
|
"buffer, size %d, start %d\n",
|
|
buffer->size, buffer->start);
|
|
else {
|
|
printk(KERN_INFO "ram_console: found existing buffer, "
|
|
"size %d, start %d\n",
|
|
buffer->size, buffer->start);
|
|
ram_console_save_old(buffer, old_buf);
|
|
}
|
|
} else {
|
|
printk(KERN_INFO "ram_console: no valid data in buffer "
|
|
"(sig = 0x%08x)\n", buffer->sig);
|
|
}
|
|
|
|
buffer->sig = RAM_CONSOLE_SIG;
|
|
buffer->start = 0;
|
|
buffer->size = 0;
|
|
|
|
register_console(&ram_console);
|
|
#ifdef CONFIG_ANDROID_RAM_CONSOLE_ENABLE_VERBOSE
|
|
console_verbose();
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_ANDROID_RAM_CONSOLE_EARLY_INIT
|
|
static int __init ram_console_early_init(void)
|
|
{
|
|
return ram_console_init((struct ram_console_buffer *)
|
|
CONFIG_ANDROID_RAM_CONSOLE_EARLY_ADDR,
|
|
CONFIG_ANDROID_RAM_CONSOLE_EARLY_SIZE,
|
|
ram_console_old_log_init_buffer);
|
|
}
|
|
#else
|
|
static int ram_console_driver_probe(struct platform_device *pdev)
|
|
{
|
|
struct resource *res = pdev->resource;
|
|
size_t start;
|
|
size_t buffer_size;
|
|
void *buffer;
|
|
|
|
if (res == NULL || pdev->num_resources != 1 ||
|
|
!(res->flags & IORESOURCE_MEM)) {
|
|
printk(KERN_ERR "ram_console: invalid resource, %p %d flags "
|
|
"%lx\n", res, pdev->num_resources, res ? res->flags : 0);
|
|
return -ENXIO;
|
|
}
|
|
buffer_size = res->end - res->start + 1;
|
|
start = res->start;
|
|
printk(KERN_INFO "ram_console: got buffer at %zx, size %zx\n",
|
|
start, buffer_size);
|
|
buffer = ioremap(res->start, buffer_size);
|
|
if (buffer == NULL) {
|
|
printk(KERN_ERR "ram_console: failed to map memory\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
return ram_console_init(buffer, buffer_size, NULL/* allocate */);
|
|
}
|
|
|
|
static struct platform_driver ram_console_driver = {
|
|
.probe = ram_console_driver_probe,
|
|
.driver = {
|
|
.name = "ram_console",
|
|
},
|
|
};
|
|
|
|
static int __init ram_console_module_init(void)
|
|
{
|
|
int err;
|
|
err = platform_driver_register(&ram_console_driver);
|
|
return err;
|
|
}
|
|
#endif
|
|
|
|
static ssize_t ram_console_read_old(struct file *file, char __user *buf,
|
|
size_t len, loff_t *offset)
|
|
{
|
|
loff_t pos = *offset;
|
|
ssize_t count;
|
|
|
|
if (pos >= ram_console_old_log_size)
|
|
return 0;
|
|
|
|
count = min(len, (size_t)(ram_console_old_log_size - pos));
|
|
if (copy_to_user(buf, ram_console_old_log + pos, count))
|
|
return -EFAULT;
|
|
|
|
*offset += count;
|
|
return count;
|
|
}
|
|
|
|
static struct file_operations ram_console_file_ops = {
|
|
.owner = THIS_MODULE,
|
|
.read = ram_console_read_old,
|
|
};
|
|
|
|
static int __init ram_console_late_init(void)
|
|
{
|
|
struct proc_dir_entry *entry;
|
|
|
|
if (ram_console_old_log == NULL)
|
|
return 0;
|
|
#ifdef CONFIG_ANDROID_RAM_CONSOLE_EARLY_INIT
|
|
ram_console_old_log = kmalloc(ram_console_old_log_size, GFP_KERNEL);
|
|
if (ram_console_old_log == NULL) {
|
|
printk(KERN_ERR
|
|
"ram_console: failed to allocate buffer for old log\n");
|
|
ram_console_old_log_size = 0;
|
|
return 0;
|
|
}
|
|
memcpy(ram_console_old_log,
|
|
ram_console_old_log_init_buffer, ram_console_old_log_size);
|
|
#endif
|
|
entry = create_proc_entry("last_kmsg", S_IFREG | S_IRUGO, NULL);
|
|
if (!entry) {
|
|
printk(KERN_ERR "ram_console: failed to create proc entry\n");
|
|
kfree(ram_console_old_log);
|
|
ram_console_old_log = NULL;
|
|
return 0;
|
|
}
|
|
|
|
entry->proc_fops = &ram_console_file_ops;
|
|
entry->size = ram_console_old_log_size;
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_ANDROID_RAM_CONSOLE_EARLY_INIT
|
|
console_initcall(ram_console_early_init);
|
|
#else
|
|
module_init(ram_console_module_init);
|
|
#endif
|
|
late_initcall(ram_console_late_init);
|
|
|