blob: 7163e3487632b5137e1a7118a9fa3d2a9f35f5a5 [file] [log] [blame]
/*
* Debugfs support for hosts and cards
*
* Copyright (C) 2008 Atmel Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#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/uaccess.h>
#include <linux/mmc/card.h>
#include <linux/mmc/host.h>
#include "core.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);
#endif /* CONFIG_FAIL_MMC_REQUEST */
/* The debugfs functions are optimized away when CONFIG_DEBUG_FS isn't set. */
static int mmc_ring_buffer_show(struct seq_file *s, void *data)
{
struct mmc_host *mmc = s->private;
mmc_dump_trace_buffer(mmc, s);
return 0;
}
static int mmc_ring_buffer_open(struct inode *inode, struct file *file)
{
return single_open(file, mmc_ring_buffer_show, inode->i_private);
}
static const struct file_operations mmc_ring_buffer_fops = {
.open = mmc_ring_buffer_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
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;
}
static int mmc_ios_open(struct inode *inode, struct file *file)
{
return single_open(file, mmc_ios_show, inode->i_private);
}
static const struct file_operations mmc_ios_fops = {
.open = mmc_ios_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
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_SIMPLE_ATTRIBUTE(mmc_clock_fops, mmc_clock_opt_get, mmc_clock_opt_set,
"%llu\n");
#include <linux/delay.h>
static int mmc_scale_get(void *data, u64 *val)
{
struct mmc_host *host = data;
*val = host->clk_scaling.curr_freq;
return 0;
}
static int mmc_scale_set(void *data, u64 val)
{
int err = 0;
struct mmc_host *host = data;
mmc_claim_host(host);
mmc_host_clk_hold(host);
/* change frequency from sysfs manually */
err = mmc_clk_update_freq(host, val, host->clk_scaling.state);
if (err == -EAGAIN)
err = 0;
else if (err)
pr_err("%s: clock scale to %llu failed with error %d\n",
mmc_hostname(host), val, err);
else
pr_debug("%s: clock change to %llu finished successfully (%s)\n",
mmc_hostname(host), val, current->comm);
mmc_host_clk_release(host);
mmc_release_host(host);
return err;
}
DEFINE_SIMPLE_ATTRIBUTE(mmc_scale_fops, mmc_scale_get, mmc_scale_set,
"%llu\n");
static int mmc_max_clock_get(void *data, u64 *val)
{
struct mmc_host *host = data;
if (!host)
return -EINVAL;
*val = host->f_max;
return 0;
}
static int mmc_max_clock_set(void *data, u64 val)
{
struct mmc_host *host = data;
int err = -EINVAL;
unsigned long freq = val;
unsigned int old_freq;
if (!host || (val < host->f_min))
goto out;
mmc_claim_host(host);
if (host->bus_ops && host->bus_ops->change_bus_speed) {
old_freq = host->f_max;
host->f_max = freq;
err = host->bus_ops->change_bus_speed(host, &freq);
if (err)
host->f_max = old_freq;
}
mmc_release_host(host);
out:
return err;
}
DEFINE_SIMPLE_ATTRIBUTE(mmc_max_clock_fops, mmc_max_clock_get,
mmc_max_clock_set, "%llu\n");
static int mmc_force_err_set(void *data, u64 val)
{
struct mmc_host *host = data;
if (host && host->card && host->ops &&
host->ops->force_err_irq) {
/*
* To access the force error irq reg, we need to make
* sure the host is powered up and host clock is ticking.
*/
mmc_get_card(host->card);
host->ops->force_err_irq(host, val);
mmc_put_card(host->card);
}
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(mmc_force_err_fops, NULL, mmc_force_err_set, "%llu\n");
static int mmc_err_state_get(void *data, u64 *val)
{
struct mmc_host *host = data;
if (!host)
return -EINVAL;
*val = host->err_occurred ? 1 : 0;
return 0;
}
static int mmc_err_state_clear(void *data, u64 val)
{
struct mmc_host *host = data;
if (!host)
return -EINVAL;
host->err_occurred = false;
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(mmc_err_state, mmc_err_state_get,
mmc_err_state_clear, "%llu\n");
static int mmc_err_stats_show(struct seq_file *file, void *data)
{
struct mmc_host *host = (struct mmc_host *)file->private;
if (!host)
return -EINVAL;
seq_printf(file, "# Command Timeout Occurred:\t %d\n",
host->err_stats[MMC_ERR_CMD_TIMEOUT]);
seq_printf(file, "# Command CRC Errors Occurred:\t %d\n",
host->err_stats[MMC_ERR_CMD_CRC]);
seq_printf(file, "# Data Timeout Occurred:\t %d\n",
host->err_stats[MMC_ERR_DAT_TIMEOUT]);
seq_printf(file, "# Data CRC Errors Occurred:\t %d\n",
host->err_stats[MMC_ERR_DAT_CRC]);
seq_printf(file, "# Auto-Cmd Error Occurred:\t %d\n",
host->err_stats[MMC_ERR_ADMA]);
seq_printf(file, "# ADMA Error Occurred:\t %d\n",
host->err_stats[MMC_ERR_ADMA]);
seq_printf(file, "# Tuning Error Occurred:\t %d\n",
host->err_stats[MMC_ERR_TUNING]);
seq_printf(file, "# CMDQ RED Errors:\t\t %d\n",
host->err_stats[MMC_ERR_CMDQ_RED]);
seq_printf(file, "# CMDQ GCE Errors:\t\t %d\n",
host->err_stats[MMC_ERR_CMDQ_GCE]);
seq_printf(file, "# CMDQ ICCE Errors:\t\t %d\n",
host->err_stats[MMC_ERR_CMDQ_ICCE]);
seq_printf(file, "# Request Timedout:\t %d\n",
host->err_stats[MMC_ERR_REQ_TIMEOUT]);
seq_printf(file, "# CMDQ Request Timedout:\t %d\n",
host->err_stats[MMC_ERR_CMDQ_REQ_TIMEOUT]);
seq_printf(file, "# ICE Config Errors:\t\t %d\n",
host->err_stats[MMC_ERR_ICE_CFG]);
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;
if (!host)
return -EINVAL;
pr_debug("%s: Resetting MMC error statistics", __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,
};
void mmc_add_host_debugfs(struct mmc_host *host)
{
struct dentry *root;
root = debugfs_create_dir(mmc_hostname(host), NULL);
if (IS_ERR(root))
/* Don't complain -- debugfs just isn't enabled */
return;
if (!root)
/* Complain -- debugfs is enabled, but it failed to
* create the directory. */
goto err_root;
host->debugfs_root = root;
if (!debugfs_create_file("ios", S_IRUSR, root, host, &mmc_ios_fops))
goto err_node;
if (!debugfs_create_file("clock", S_IRUSR | S_IWUSR, root, host,
&mmc_clock_fops))
goto err_node;
if (!debugfs_create_file("max_clock", S_IRUSR | S_IWUSR, root, host,
&mmc_max_clock_fops))
goto err_node;
if (!debugfs_create_file("scale", S_IRUSR | S_IWUSR, root, host,
&mmc_scale_fops))
goto err_node;
if (!debugfs_create_bool("skip_clk_scale_freq_update",
S_IRUSR | S_IWUSR, root,
&host->clk_scaling.skip_clk_scale_freq_update))
goto err_node;
if (!debugfs_create_bool("cmdq_task_history",
S_IRUSR | S_IWUSR, root,
&host->cmdq_thist_enabled))
goto err_node;
#ifdef CONFIG_MMC_RING_BUFFER
if (!debugfs_create_file("ring_buffer", S_IRUSR,
root, host, &mmc_ring_buffer_fops))
goto err_node;
#endif
if (!debugfs_create_file("err_state", S_IRUSR | S_IWUSR, root, host,
&mmc_err_state))
goto err_node;
if (!debugfs_create_file("err_stats", 0600, root, host,
&mmc_err_stats_fops))
goto err_node;
#ifdef CONFIG_MMC_CLKGATE
if (!debugfs_create_u32("clk_delay", (S_IRUSR | S_IWUSR),
root, &host->clk_delay))
goto err_node;
#endif
#ifdef CONFIG_FAIL_MMC_REQUEST
if (fail_request)
setup_fault_attr(&fail_default_attr, fail_request);
host->fail_mmc_request = fail_default_attr;
if (IS_ERR(fault_create_debugfs_attr("fail_mmc_request",
root,
&host->fail_mmc_request)))
goto err_node;
#endif
if (!debugfs_create_file("force_error", S_IWUSR, root, host,
&mmc_force_err_fops))
goto err_node;
return;
err_node:
debugfs_remove_recursive(root);
host->debugfs_root = NULL;
err_root:
dev_err(&host->class_dev, "failed to initialize debugfs\n");
}
void mmc_remove_host_debugfs(struct mmc_host *host)
{
debugfs_remove_recursive(host->debugfs_root);
}
static int mmc_dbg_card_status_get(void *data, u64 *val)
{
struct mmc_card *card = data;
u32 status;
int ret;
mmc_get_card(card);
if (mmc_card_cmdq(card)) {
ret = mmc_cmdq_halt_on_empty_queue(card->host);
if (ret) {
pr_err("%s: halt failed while doing %s err (%d)\n",
mmc_hostname(card->host), __func__,
ret);
goto out;
}
}
ret = mmc_send_status(data, &status);
if (!ret)
*val = status;
if (mmc_card_cmdq(card)) {
if (mmc_cmdq_halt(card->host, false))
pr_err("%s: %s: cmdq unhalt failed\n",
mmc_hostname(card->host), __func__);
}
out:
mmc_put_card(card);
return ret;
}
DEFINE_SIMPLE_ATTRIBUTE(mmc_dbg_card_status_fops, mmc_dbg_card_status_get,
NULL, "%08llx\n");
#define EXT_CSD_STR_LEN 1025
static int mmc_ext_csd_open(struct inode *inode, struct file *filp)
{
struct mmc_card *card = inode->i_private;
char *buf;
ssize_t n = 0;
u8 *ext_csd;
int err, i;
buf = kmalloc(EXT_CSD_STR_LEN + 1, GFP_KERNEL);
if (!buf)
return -ENOMEM;
mmc_get_card(card);
if (mmc_card_cmdq(card)) {
err = mmc_cmdq_halt_on_empty_queue(card->host);
if (err) {
pr_err("%s: halt failed while doing %s err (%d)\n",
mmc_hostname(card->host), __func__,
err);
mmc_put_card(card);
goto out_free_halt;
}
}
err = mmc_get_ext_csd(card, &ext_csd);
if (err)
goto out_free;
for (i = 0; i < 512; i++)
n += sprintf(buf + n, "%02x", ext_csd[i]);
n += sprintf(buf + n, "\n");
BUG_ON(n != EXT_CSD_STR_LEN);
filp->private_data = buf;
if (mmc_card_cmdq(card)) {
if (mmc_cmdq_halt(card->host, false))
pr_err("%s: %s: cmdq unhalt failed\n",
mmc_hostname(card->host), __func__);
}
mmc_put_card(card);
kfree(ext_csd);
return 0;
out_free:
if (mmc_card_cmdq(card)) {
if (mmc_cmdq_halt(card->host, false))
pr_err("%s: %s: cmdq unhalt failed\n",
mmc_hostname(card->host), __func__);
}
mmc_put_card(card);
out_free_halt:
kfree(buf);
return err;
}
static ssize_t mmc_ext_csd_read(struct file *filp, char __user *ubuf,
size_t cnt, loff_t *ppos)
{
char *buf = filp->private_data;
return simple_read_from_buffer(ubuf, cnt, ppos,
buf, EXT_CSD_STR_LEN);
}
static int mmc_ext_csd_release(struct inode *inode, struct file *file)
{
kfree(file->private_data);
return 0;
}
static const struct file_operations mmc_dbg_ext_csd_fops = {
.open = mmc_ext_csd_open,
.read = mmc_ext_csd_read,
.release = mmc_ext_csd_release,
.llseek = default_llseek,
};
static int mmc_wr_pack_stats_open(struct inode *inode, struct file *filp)
{
struct mmc_card *card = inode->i_private;
filp->private_data = card;
card->wr_pack_stats.print_in_read = 1;
return 0;
}
#define TEMP_BUF_SIZE 256
static ssize_t mmc_wr_pack_stats_read(struct file *filp, char __user *ubuf,
size_t cnt, loff_t *ppos)
{
struct mmc_card *card = filp->private_data;
struct mmc_wr_pack_stats *pack_stats;
int i;
int max_num_of_packed_reqs = 0;
char *temp_buf;
if (!card)
return cnt;
if (!access_ok(VERIFY_WRITE, ubuf, cnt))
return cnt;
if (!card->wr_pack_stats.print_in_read)
return 0;
if (!card->wr_pack_stats.enabled) {
pr_info("%s: write packing statistics are disabled\n",
mmc_hostname(card->host));
goto exit;
}
pack_stats = &card->wr_pack_stats;
if (!pack_stats->packing_events) {
pr_info("%s: NULL packing_events\n", mmc_hostname(card->host));
goto exit;
}
max_num_of_packed_reqs = card->ext_csd.max_packed_writes;
temp_buf = kmalloc(TEMP_BUF_SIZE, GFP_KERNEL);
if (!temp_buf)
goto exit;
spin_lock(&pack_stats->lock);
snprintf(temp_buf, TEMP_BUF_SIZE, "%s: write packing statistics:\n",
mmc_hostname(card->host));
strlcat(ubuf, temp_buf, cnt);
for (i = 1 ; i <= max_num_of_packed_reqs ; ++i) {
if (pack_stats->packing_events[i]) {
snprintf(temp_buf, TEMP_BUF_SIZE,
"%s: Packed %d reqs - %d times\n",
mmc_hostname(card->host), i,
pack_stats->packing_events[i]);
strlcat(ubuf, temp_buf, cnt);
}
}
snprintf(temp_buf, TEMP_BUF_SIZE,
"%s: stopped packing due to the following reasons:\n",
mmc_hostname(card->host));
strlcat(ubuf, temp_buf, cnt);
if (pack_stats->pack_stop_reason[EXCEEDS_SEGMENTS]) {
snprintf(temp_buf, TEMP_BUF_SIZE,
"%s: %d times: exceed max num of segments\n",
mmc_hostname(card->host),
pack_stats->pack_stop_reason[EXCEEDS_SEGMENTS]);
strlcat(ubuf, temp_buf, cnt);
}
if (pack_stats->pack_stop_reason[EXCEEDS_SECTORS]) {
snprintf(temp_buf, TEMP_BUF_SIZE,
"%s: %d times: exceed max num of sectors\n",
mmc_hostname(card->host),
pack_stats->pack_stop_reason[EXCEEDS_SECTORS]);
strlcat(ubuf, temp_buf, cnt);
}
if (pack_stats->pack_stop_reason[WRONG_DATA_DIR]) {
snprintf(temp_buf, TEMP_BUF_SIZE,
"%s: %d times: wrong data direction\n",
mmc_hostname(card->host),
pack_stats->pack_stop_reason[WRONG_DATA_DIR]);
strlcat(ubuf, temp_buf, cnt);
}
if (pack_stats->pack_stop_reason[FLUSH_OR_DISCARD]) {
snprintf(temp_buf, TEMP_BUF_SIZE,
"%s: %d times: flush or discard\n",
mmc_hostname(card->host),
pack_stats->pack_stop_reason[FLUSH_OR_DISCARD]);
strlcat(ubuf, temp_buf, cnt);
}
if (pack_stats->pack_stop_reason[EMPTY_QUEUE]) {
snprintf(temp_buf, TEMP_BUF_SIZE,
"%s: %d times: empty queue\n",
mmc_hostname(card->host),
pack_stats->pack_stop_reason[EMPTY_QUEUE]);
strlcat(ubuf, temp_buf, cnt);
}
if (pack_stats->pack_stop_reason[REL_WRITE]) {
snprintf(temp_buf, TEMP_BUF_SIZE,
"%s: %d times: rel write\n",
mmc_hostname(card->host),
pack_stats->pack_stop_reason[REL_WRITE]);
strlcat(ubuf, temp_buf, cnt);
}
if (pack_stats->pack_stop_reason[THRESHOLD]) {
snprintf(temp_buf, TEMP_BUF_SIZE,
"%s: %d times: Threshold\n",
mmc_hostname(card->host),
pack_stats->pack_stop_reason[THRESHOLD]);
strlcat(ubuf, temp_buf, cnt);
}
if (pack_stats->pack_stop_reason[LARGE_SEC_ALIGN]) {
snprintf(temp_buf, TEMP_BUF_SIZE,
"%s: %d times: Large sector alignment\n",
mmc_hostname(card->host),
pack_stats->pack_stop_reason[LARGE_SEC_ALIGN]);
strlcat(ubuf, temp_buf, cnt);
}
if (pack_stats->pack_stop_reason[RANDOM]) {
snprintf(temp_buf, TEMP_BUF_SIZE,
"%s: %d times: random request\n",
mmc_hostname(card->host),
pack_stats->pack_stop_reason[RANDOM]);
strlcat(ubuf, temp_buf, cnt);
}
if (pack_stats->pack_stop_reason[FUA]) {
snprintf(temp_buf, TEMP_BUF_SIZE,
"%s: %d times: fua request\n",
mmc_hostname(card->host),
pack_stats->pack_stop_reason[FUA]);
strlcat(ubuf, temp_buf, cnt);
}
spin_unlock(&pack_stats->lock);
kfree(temp_buf);
pr_info("%s", ubuf);
exit:
if (card->wr_pack_stats.print_in_read == 1) {
card->wr_pack_stats.print_in_read = 0;
return strnlen(ubuf, cnt);
}
return 0;
}
static ssize_t mmc_wr_pack_stats_write(struct file *filp,
const char __user *ubuf, size_t cnt,
loff_t *ppos)
{
struct mmc_card *card = filp->private_data;
int value;
if (!card)
return cnt;
if (!access_ok(VERIFY_READ, ubuf, cnt))
return cnt;
sscanf(ubuf, "%d", &value);
if (value) {
mmc_blk_init_packed_statistics(card);
} else {
spin_lock(&card->wr_pack_stats.lock);
card->wr_pack_stats.enabled = false;
spin_unlock(&card->wr_pack_stats.lock);
}
return cnt;
}
static const struct file_operations mmc_dbg_wr_pack_stats_fops = {
.open = mmc_wr_pack_stats_open,
.read = mmc_wr_pack_stats_read,
.write = mmc_wr_pack_stats_write,
};
static int mmc_bkops_stats_read(struct seq_file *file, void *data)
{
struct mmc_card *card = file->private;
struct mmc_bkops_stats *stats;
int i;
if (!card)
return -EINVAL;
stats = &card->bkops.stats;
if (!stats->enabled) {
pr_info("%s: bkops statistics are disabled\n",
mmc_hostname(card->host));
goto exit;
}
spin_lock(&stats->lock);
seq_printf(file, "%s: bkops statistics:\n",
mmc_hostname(card->host));
seq_printf(file, "%s: BKOPS: sent START_BKOPS to device: %u\n",
mmc_hostname(card->host), stats->manual_start);
seq_printf(file, "%s: BKOPS: stopped due to HPI: %u\n",
mmc_hostname(card->host), stats->hpi);
seq_printf(file, "%s: BKOPS: sent AUTO_EN set to 1: %u\n",
mmc_hostname(card->host), stats->auto_start);
seq_printf(file, "%s: BKOPS: sent AUTO_EN set to 0: %u\n",
mmc_hostname(card->host), stats->auto_stop);
for (i = 0 ; i < MMC_BKOPS_NUM_SEVERITY_LEVELS ; ++i)
seq_printf(file, "%s: BKOPS: due to level %d: %u\n",
mmc_hostname(card->host), i, stats->level[i]);
spin_unlock(&stats->lock);
exit:
return 0;
}
static ssize_t mmc_bkops_stats_write(struct file *filp,
const char __user *ubuf, size_t cnt,
loff_t *ppos)
{
struct mmc_card *card = filp->f_mapping->host->i_private;
int value;
struct mmc_bkops_stats *stats;
int err;
if (!card)
return cnt;
stats = &card->bkops.stats;
err = kstrtoint_from_user(ubuf, cnt, 0, &value);
if (err) {
pr_err("%s: %s: error parsing input from user (%d)\n",
mmc_hostname(card->host), __func__, err);
return err;
}
if (value) {
mmc_blk_init_bkops_statistics(card);
} else {
spin_lock(&stats->lock);
stats->enabled = false;
spin_unlock(&stats->lock);
}
return cnt;
}
static int mmc_bkops_stats_open(struct inode *inode, struct file *file)
{
return single_open(file, mmc_bkops_stats_read, inode->i_private);
}
static const struct file_operations mmc_dbg_bkops_stats_fops = {
.open = mmc_bkops_stats_open,
.read = seq_read,
.write = mmc_bkops_stats_write,
};
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);
if (IS_ERR(root))
/* Don't complain -- debugfs just isn't enabled */
return;
if (!root)
/* Complain -- debugfs is enabled, but it failed to
* create the directory. */
goto err;
card->debugfs_root = root;
if (!debugfs_create_x32("state", S_IRUSR, root, &card->state))
goto err;
if (mmc_card_mmc(card) || mmc_card_sd(card))
if (!debugfs_create_file("status", S_IRUSR, root, card,
&mmc_dbg_card_status_fops))
goto err;
if (mmc_card_mmc(card))
if (!debugfs_create_file("ext_csd", S_IRUSR, root, card,
&mmc_dbg_ext_csd_fops))
goto err;
if (mmc_card_mmc(card) && (card->ext_csd.rev >= 6) &&
(card->host->caps2 & MMC_CAP2_PACKED_WR))
if (!debugfs_create_file("wr_pack_stats", S_IRUSR, root, card,
&mmc_dbg_wr_pack_stats_fops))
goto err;
if (mmc_card_mmc(card) && (card->ext_csd.rev >= 5) &&
(mmc_card_configured_auto_bkops(card) ||
mmc_card_configured_manual_bkops(card)))
if (!debugfs_create_file("bkops_stats", S_IRUSR, root, card,
&mmc_dbg_bkops_stats_fops))
goto err;
return;
err:
debugfs_remove_recursive(root);
card->debugfs_root = NULL;
dev_err(&card->dev, "failed to initialize debugfs\n");
}
void mmc_remove_card_debugfs(struct mmc_card *card)
{
debugfs_remove_recursive(card->debugfs_root);
}