mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 02:39:48 +00:00
![Wei Yongjun](/assets/img/avatar_default.png)
When using single_open() for opening, single_release() should be used instead of seq_release(), otherwise there is a memory leak. Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Link: https://lore.kernel.org/r/20220608090152.179395-1-weiyongjun1@huawei.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
351 lines
7.9 KiB
C
351 lines
7.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Debugfs support for hosts and cards
|
|
*
|
|
* Copyright (C) 2008 Atmel Corporation
|
|
*/
|
|
#include <linux/moduleparam.h>
|
|
#include <linux/export.h>
|
|
#include <linux/debugfs.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/stat.h>
|
|
#include <linux/fault-inject.h>
|
|
|
|
#include <linux/mmc/card.h>
|
|
#include <linux/mmc/host.h>
|
|
|
|
#include "core.h"
|
|
#include "card.h"
|
|
#include "host.h"
|
|
#include "mmc_ops.h"
|
|
|
|
#ifdef CONFIG_FAIL_MMC_REQUEST
|
|
|
|
static DECLARE_FAULT_ATTR(fail_default_attr);
|
|
static char *fail_request;
|
|
module_param(fail_request, charp, 0);
|
|
MODULE_PARM_DESC(fail_request, "default fault injection attributes");
|
|
|
|
#endif /* CONFIG_FAIL_MMC_REQUEST */
|
|
|
|
/* The debugfs functions are optimized away when CONFIG_DEBUG_FS isn't set. */
|
|
static int mmc_ios_show(struct seq_file *s, void *data)
|
|
{
|
|
static const char *vdd_str[] = {
|
|
[8] = "2.0",
|
|
[9] = "2.1",
|
|
[10] = "2.2",
|
|
[11] = "2.3",
|
|
[12] = "2.4",
|
|
[13] = "2.5",
|
|
[14] = "2.6",
|
|
[15] = "2.7",
|
|
[16] = "2.8",
|
|
[17] = "2.9",
|
|
[18] = "3.0",
|
|
[19] = "3.1",
|
|
[20] = "3.2",
|
|
[21] = "3.3",
|
|
[22] = "3.4",
|
|
[23] = "3.5",
|
|
[24] = "3.6",
|
|
};
|
|
struct mmc_host *host = s->private;
|
|
struct mmc_ios *ios = &host->ios;
|
|
const char *str;
|
|
|
|
seq_printf(s, "clock:\t\t%u Hz\n", ios->clock);
|
|
if (host->actual_clock)
|
|
seq_printf(s, "actual clock:\t%u Hz\n", host->actual_clock);
|
|
seq_printf(s, "vdd:\t\t%u ", ios->vdd);
|
|
if ((1 << ios->vdd) & MMC_VDD_165_195)
|
|
seq_printf(s, "(1.65 - 1.95 V)\n");
|
|
else if (ios->vdd < (ARRAY_SIZE(vdd_str) - 1)
|
|
&& vdd_str[ios->vdd] && vdd_str[ios->vdd + 1])
|
|
seq_printf(s, "(%s ~ %s V)\n", vdd_str[ios->vdd],
|
|
vdd_str[ios->vdd + 1]);
|
|
else
|
|
seq_printf(s, "(invalid)\n");
|
|
|
|
switch (ios->bus_mode) {
|
|
case MMC_BUSMODE_OPENDRAIN:
|
|
str = "open drain";
|
|
break;
|
|
case MMC_BUSMODE_PUSHPULL:
|
|
str = "push-pull";
|
|
break;
|
|
default:
|
|
str = "invalid";
|
|
break;
|
|
}
|
|
seq_printf(s, "bus mode:\t%u (%s)\n", ios->bus_mode, str);
|
|
|
|
switch (ios->chip_select) {
|
|
case MMC_CS_DONTCARE:
|
|
str = "don't care";
|
|
break;
|
|
case MMC_CS_HIGH:
|
|
str = "active high";
|
|
break;
|
|
case MMC_CS_LOW:
|
|
str = "active low";
|
|
break;
|
|
default:
|
|
str = "invalid";
|
|
break;
|
|
}
|
|
seq_printf(s, "chip select:\t%u (%s)\n", ios->chip_select, str);
|
|
|
|
switch (ios->power_mode) {
|
|
case MMC_POWER_OFF:
|
|
str = "off";
|
|
break;
|
|
case MMC_POWER_UP:
|
|
str = "up";
|
|
break;
|
|
case MMC_POWER_ON:
|
|
str = "on";
|
|
break;
|
|
default:
|
|
str = "invalid";
|
|
break;
|
|
}
|
|
seq_printf(s, "power mode:\t%u (%s)\n", ios->power_mode, str);
|
|
seq_printf(s, "bus width:\t%u (%u bits)\n",
|
|
ios->bus_width, 1 << ios->bus_width);
|
|
|
|
switch (ios->timing) {
|
|
case MMC_TIMING_LEGACY:
|
|
str = "legacy";
|
|
break;
|
|
case MMC_TIMING_MMC_HS:
|
|
str = "mmc high-speed";
|
|
break;
|
|
case MMC_TIMING_SD_HS:
|
|
str = "sd high-speed";
|
|
break;
|
|
case MMC_TIMING_UHS_SDR12:
|
|
str = "sd uhs SDR12";
|
|
break;
|
|
case MMC_TIMING_UHS_SDR25:
|
|
str = "sd uhs SDR25";
|
|
break;
|
|
case MMC_TIMING_UHS_SDR50:
|
|
str = "sd uhs SDR50";
|
|
break;
|
|
case MMC_TIMING_UHS_SDR104:
|
|
str = "sd uhs SDR104";
|
|
break;
|
|
case MMC_TIMING_UHS_DDR50:
|
|
str = "sd uhs DDR50";
|
|
break;
|
|
case MMC_TIMING_MMC_DDR52:
|
|
str = "mmc DDR52";
|
|
break;
|
|
case MMC_TIMING_MMC_HS200:
|
|
str = "mmc HS200";
|
|
break;
|
|
case MMC_TIMING_MMC_HS400:
|
|
str = mmc_card_hs400es(host->card) ?
|
|
"mmc HS400 enhanced strobe" : "mmc HS400";
|
|
break;
|
|
default:
|
|
str = "invalid";
|
|
break;
|
|
}
|
|
seq_printf(s, "timing spec:\t%u (%s)\n", ios->timing, str);
|
|
|
|
switch (ios->signal_voltage) {
|
|
case MMC_SIGNAL_VOLTAGE_330:
|
|
str = "3.30 V";
|
|
break;
|
|
case MMC_SIGNAL_VOLTAGE_180:
|
|
str = "1.80 V";
|
|
break;
|
|
case MMC_SIGNAL_VOLTAGE_120:
|
|
str = "1.20 V";
|
|
break;
|
|
default:
|
|
str = "invalid";
|
|
break;
|
|
}
|
|
seq_printf(s, "signal voltage:\t%u (%s)\n", ios->signal_voltage, str);
|
|
|
|
switch (ios->drv_type) {
|
|
case MMC_SET_DRIVER_TYPE_A:
|
|
str = "driver type A";
|
|
break;
|
|
case MMC_SET_DRIVER_TYPE_B:
|
|
str = "driver type B";
|
|
break;
|
|
case MMC_SET_DRIVER_TYPE_C:
|
|
str = "driver type C";
|
|
break;
|
|
case MMC_SET_DRIVER_TYPE_D:
|
|
str = "driver type D";
|
|
break;
|
|
default:
|
|
str = "invalid";
|
|
break;
|
|
}
|
|
seq_printf(s, "driver type:\t%u (%s)\n", ios->drv_type, str);
|
|
|
|
return 0;
|
|
}
|
|
DEFINE_SHOW_ATTRIBUTE(mmc_ios);
|
|
|
|
static int mmc_clock_opt_get(void *data, u64 *val)
|
|
{
|
|
struct mmc_host *host = data;
|
|
|
|
*val = host->ios.clock;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mmc_clock_opt_set(void *data, u64 val)
|
|
{
|
|
struct mmc_host *host = data;
|
|
|
|
/* We need this check due to input value is u64 */
|
|
if (val != 0 && (val > host->f_max || val < host->f_min))
|
|
return -EINVAL;
|
|
|
|
mmc_claim_host(host);
|
|
mmc_set_clock(host, (unsigned int) val);
|
|
mmc_release_host(host);
|
|
|
|
return 0;
|
|
}
|
|
|
|
DEFINE_DEBUGFS_ATTRIBUTE(mmc_clock_fops, mmc_clock_opt_get, mmc_clock_opt_set,
|
|
"%llu\n");
|
|
|
|
static int mmc_err_state_get(void *data, u64 *val)
|
|
{
|
|
struct mmc_host *host = data;
|
|
int i;
|
|
|
|
if (!host)
|
|
return -EINVAL;
|
|
|
|
*val = 0;
|
|
for (i = 0; i < MMC_ERR_MAX; i++) {
|
|
if (host->err_stats[i]) {
|
|
*val = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
DEFINE_DEBUGFS_ATTRIBUTE(mmc_err_state, mmc_err_state_get, NULL, "%llu\n");
|
|
|
|
static int mmc_err_stats_show(struct seq_file *file, void *data)
|
|
{
|
|
struct mmc_host *host = (struct mmc_host *)file->private;
|
|
const char *desc[MMC_ERR_MAX] = {
|
|
[MMC_ERR_CMD_TIMEOUT] = "Command Timeout Occurred",
|
|
[MMC_ERR_CMD_CRC] = "Command CRC Errors Occurred",
|
|
[MMC_ERR_DAT_TIMEOUT] = "Data Timeout Occurred",
|
|
[MMC_ERR_DAT_CRC] = "Data CRC Errors Occurred",
|
|
[MMC_ERR_AUTO_CMD] = "Auto-Cmd Error Occurred",
|
|
[MMC_ERR_ADMA] = "ADMA Error Occurred",
|
|
[MMC_ERR_TUNING] = "Tuning Error Occurred",
|
|
[MMC_ERR_CMDQ_RED] = "CMDQ RED Errors",
|
|
[MMC_ERR_CMDQ_GCE] = "CMDQ GCE Errors",
|
|
[MMC_ERR_CMDQ_ICCE] = "CMDQ ICCE Errors",
|
|
[MMC_ERR_REQ_TIMEOUT] = "Request Timedout",
|
|
[MMC_ERR_CMDQ_REQ_TIMEOUT] = "CMDQ Request Timedout",
|
|
[MMC_ERR_ICE_CFG] = "ICE Config Errors",
|
|
[MMC_ERR_CTRL_TIMEOUT] = "Controller Timedout errors",
|
|
[MMC_ERR_UNEXPECTED_IRQ] = "Unexpected IRQ errors",
|
|
};
|
|
int i;
|
|
|
|
for (i = 0; i < MMC_ERR_MAX; i++) {
|
|
if (desc[i])
|
|
seq_printf(file, "# %s:\t %d\n",
|
|
desc[i], host->err_stats[i]);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mmc_err_stats_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, mmc_err_stats_show, inode->i_private);
|
|
}
|
|
|
|
static ssize_t mmc_err_stats_write(struct file *filp, const char __user *ubuf,
|
|
size_t cnt, loff_t *ppos)
|
|
{
|
|
struct mmc_host *host = filp->f_mapping->host->i_private;
|
|
|
|
pr_debug("%s: Resetting MMC error statistics\n", __func__);
|
|
memset(host->err_stats, 0, sizeof(host->err_stats));
|
|
|
|
return cnt;
|
|
}
|
|
|
|
static const struct file_operations mmc_err_stats_fops = {
|
|
.open = mmc_err_stats_open,
|
|
.read = seq_read,
|
|
.write = mmc_err_stats_write,
|
|
.release = single_release,
|
|
};
|
|
|
|
void mmc_add_host_debugfs(struct mmc_host *host)
|
|
{
|
|
struct dentry *root;
|
|
|
|
root = debugfs_create_dir(mmc_hostname(host), NULL);
|
|
host->debugfs_root = root;
|
|
|
|
debugfs_create_file("ios", S_IRUSR, root, host, &mmc_ios_fops);
|
|
debugfs_create_x32("caps", S_IRUSR, root, &host->caps);
|
|
debugfs_create_x32("caps2", S_IRUSR, root, &host->caps2);
|
|
debugfs_create_file_unsafe("clock", S_IRUSR | S_IWUSR, root, host,
|
|
&mmc_clock_fops);
|
|
|
|
debugfs_create_file_unsafe("err_state", 0600, root, host,
|
|
&mmc_err_state);
|
|
debugfs_create_file("err_stats", 0600, root, host,
|
|
&mmc_err_stats_fops);
|
|
|
|
#ifdef CONFIG_FAIL_MMC_REQUEST
|
|
if (fail_request)
|
|
setup_fault_attr(&fail_default_attr, fail_request);
|
|
host->fail_mmc_request = fail_default_attr;
|
|
fault_create_debugfs_attr("fail_mmc_request", root,
|
|
&host->fail_mmc_request);
|
|
#endif
|
|
}
|
|
|
|
void mmc_remove_host_debugfs(struct mmc_host *host)
|
|
{
|
|
debugfs_remove_recursive(host->debugfs_root);
|
|
}
|
|
|
|
void mmc_add_card_debugfs(struct mmc_card *card)
|
|
{
|
|
struct mmc_host *host = card->host;
|
|
struct dentry *root;
|
|
|
|
if (!host->debugfs_root)
|
|
return;
|
|
|
|
root = debugfs_create_dir(mmc_card_id(card), host->debugfs_root);
|
|
card->debugfs_root = root;
|
|
|
|
debugfs_create_x32("state", S_IRUSR, root, &card->state);
|
|
}
|
|
|
|
void mmc_remove_card_debugfs(struct mmc_card *card)
|
|
{
|
|
debugfs_remove_recursive(card->debugfs_root);
|
|
card->debugfs_root = NULL;
|
|
}
|