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linux/drivers/media/common/siano/smsdvb-debugfs.c
Linus Torvalds a9a08845e9 vfs: do bulk POLL* -> EPOLL* replacement 
This is the mindless scripted replacement of kernel use of POLL*
variables as described by Al, done by this script:

    for V in IN OUT PRI ERR RDNORM RDBAND WRNORM WRBAND HUP RDHUP NVAL MSG; do
        L=`git grep -l -w POLL$V | grep -v '^t' | grep -v /um/ | grep -v '^sa' | grep -v '/poll.h$'|grep -v '^D'`
        for f in $L; do sed -i "-es/^\([^\"]*\)\(\<POLL$V\>\)/\\1E\\2/" $f; done
    done

with de-mangling cleanups yet to come.

NOTE! On almost all architectures, the EPOLL* constants have the same
values as the POLL* constants do.  But they keyword here is "almost".
For various bad reasons they aren't the same, and epoll() doesn't
actually work quite correctly in some cases due to this on Sparc et al.

The next patch from Al will sort out the final differences, and we
should be all done.

Scripted-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-02-11 14:34:03 -08:00

532 lines
16 KiB
C
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// SPDX-License-Identifier: GPL-2.0+
//
// Copyright(c) 2013 Mauro Carvalho Chehab
#include "smscoreapi.h"
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/debugfs.h>
#include <linux/spinlock.h>
#include <linux/usb.h>
#include <media/dmxdev.h>
#include <media/dvbdev.h>
#include <media/dvb_demux.h>
#include <media/dvb_frontend.h>
#include "smsdvb.h"
static struct dentry *smsdvb_debugfs_usb_root;
struct smsdvb_debugfs {
struct kref refcount;
spinlock_t lock;
char stats_data[PAGE_SIZE];
unsigned stats_count;
bool stats_was_read;
wait_queue_head_t stats_queue;
};
static void smsdvb_print_dvb_stats(struct smsdvb_debugfs *debug_data,
struct sms_stats *p)
{
int n = 0;
char *buf;
spin_lock(&debug_data->lock);
if (debug_data->stats_count) {
spin_unlock(&debug_data->lock);
return;
}
buf = debug_data->stats_data;
n += snprintf(&buf[n], PAGE_SIZE - n,
"is_rf_locked = %d\n", p->is_rf_locked);
n += snprintf(&buf[n], PAGE_SIZE - n,
"is_demod_locked = %d\n", p->is_demod_locked);
n += snprintf(&buf[n], PAGE_SIZE - n,
"is_external_lna_on = %d\n", p->is_external_lna_on);
n += snprintf(&buf[n], PAGE_SIZE - n,
"SNR = %d\n", p->SNR);
n += snprintf(&buf[n], PAGE_SIZE - n,
"ber = %d\n", p->ber);
n += snprintf(&buf[n], PAGE_SIZE - n,
"FIB_CRC = %d\n", p->FIB_CRC);
n += snprintf(&buf[n], PAGE_SIZE - n,
"ts_per = %d\n", p->ts_per);
n += snprintf(&buf[n], PAGE_SIZE - n,
"MFER = %d\n", p->MFER);
n += snprintf(&buf[n], PAGE_SIZE - n,
"RSSI = %d\n", p->RSSI);
n += snprintf(&buf[n], PAGE_SIZE - n,
"in_band_pwr = %d\n", p->in_band_pwr);
n += snprintf(&buf[n], PAGE_SIZE - n,
"carrier_offset = %d\n", p->carrier_offset);
n += snprintf(&buf[n], PAGE_SIZE - n,
"modem_state = %d\n", p->modem_state);
n += snprintf(&buf[n], PAGE_SIZE - n,
"frequency = %d\n", p->frequency);
n += snprintf(&buf[n], PAGE_SIZE - n,
"bandwidth = %d\n", p->bandwidth);
n += snprintf(&buf[n], PAGE_SIZE - n,
"transmission_mode = %d\n", p->transmission_mode);
n += snprintf(&buf[n], PAGE_SIZE - n,
"modem_state = %d\n", p->modem_state);
n += snprintf(&buf[n], PAGE_SIZE - n,
"guard_interval = %d\n", p->guard_interval);
n += snprintf(&buf[n], PAGE_SIZE - n,
"code_rate = %d\n", p->code_rate);
n += snprintf(&buf[n], PAGE_SIZE - n,
"lp_code_rate = %d\n", p->lp_code_rate);
n += snprintf(&buf[n], PAGE_SIZE - n,
"hierarchy = %d\n", p->hierarchy);
n += snprintf(&buf[n], PAGE_SIZE - n,
"constellation = %d\n", p->constellation);
n += snprintf(&buf[n], PAGE_SIZE - n,
"burst_size = %d\n", p->burst_size);
n += snprintf(&buf[n], PAGE_SIZE - n,
"burst_duration = %d\n", p->burst_duration);
n += snprintf(&buf[n], PAGE_SIZE - n,
"burst_cycle_time = %d\n", p->burst_cycle_time);
n += snprintf(&buf[n], PAGE_SIZE - n,
"calc_burst_cycle_time = %d\n",
p->calc_burst_cycle_time);
n += snprintf(&buf[n], PAGE_SIZE - n,
"num_of_rows = %d\n", p->num_of_rows);
n += snprintf(&buf[n], PAGE_SIZE - n,
"num_of_padd_cols = %d\n", p->num_of_padd_cols);
n += snprintf(&buf[n], PAGE_SIZE - n,
"num_of_punct_cols = %d\n", p->num_of_punct_cols);
n += snprintf(&buf[n], PAGE_SIZE - n,
"error_ts_packets = %d\n", p->error_ts_packets);
n += snprintf(&buf[n], PAGE_SIZE - n,
"total_ts_packets = %d\n", p->total_ts_packets);
n += snprintf(&buf[n], PAGE_SIZE - n,
"num_of_valid_mpe_tlbs = %d\n", p->num_of_valid_mpe_tlbs);
n += snprintf(&buf[n], PAGE_SIZE - n,
"num_of_invalid_mpe_tlbs = %d\n", p->num_of_invalid_mpe_tlbs);
n += snprintf(&buf[n], PAGE_SIZE - n,
"num_of_corrected_mpe_tlbs = %d\n", p->num_of_corrected_mpe_tlbs);
n += snprintf(&buf[n], PAGE_SIZE - n,
"ber_error_count = %d\n", p->ber_error_count);
n += snprintf(&buf[n], PAGE_SIZE - n,
"ber_bit_count = %d\n", p->ber_bit_count);
n += snprintf(&buf[n], PAGE_SIZE - n,
"sms_to_host_tx_errors = %d\n", p->sms_to_host_tx_errors);
n += snprintf(&buf[n], PAGE_SIZE - n,
"pre_ber = %d\n", p->pre_ber);
n += snprintf(&buf[n], PAGE_SIZE - n,
"cell_id = %d\n", p->cell_id);
n += snprintf(&buf[n], PAGE_SIZE - n,
"dvbh_srv_ind_hp = %d\n", p->dvbh_srv_ind_hp);
n += snprintf(&buf[n], PAGE_SIZE - n,
"dvbh_srv_ind_lp = %d\n", p->dvbh_srv_ind_lp);
n += snprintf(&buf[n], PAGE_SIZE - n,
"num_mpe_received = %d\n", p->num_mpe_received);
debug_data->stats_count = n;
spin_unlock(&debug_data->lock);
wake_up(&debug_data->stats_queue);
}
static void smsdvb_print_isdb_stats(struct smsdvb_debugfs *debug_data,
struct sms_isdbt_stats *p)
{
int i, n = 0;
char *buf;
spin_lock(&debug_data->lock);
if (debug_data->stats_count) {
spin_unlock(&debug_data->lock);
return;
}
buf = debug_data->stats_data;
n += snprintf(&buf[n], PAGE_SIZE - n,
"statistics_type = %d\t", p->statistics_type);
n += snprintf(&buf[n], PAGE_SIZE - n,
"full_size = %d\n", p->full_size);
n += snprintf(&buf[n], PAGE_SIZE - n,
"is_rf_locked = %d\t\t", p->is_rf_locked);
n += snprintf(&buf[n], PAGE_SIZE - n,
"is_demod_locked = %d\t", p->is_demod_locked);
n += snprintf(&buf[n], PAGE_SIZE - n,
"is_external_lna_on = %d\n", p->is_external_lna_on);
n += snprintf(&buf[n], PAGE_SIZE - n,
"SNR = %d dB\t\t", p->SNR);
n += snprintf(&buf[n], PAGE_SIZE - n,
"RSSI = %d dBm\t\t", p->RSSI);
n += snprintf(&buf[n], PAGE_SIZE - n,
"in_band_pwr = %d dBm\n", p->in_band_pwr);
n += snprintf(&buf[n], PAGE_SIZE - n,
"carrier_offset = %d\t", p->carrier_offset);
n += snprintf(&buf[n], PAGE_SIZE - n,
"bandwidth = %d\t\t", p->bandwidth);
n += snprintf(&buf[n], PAGE_SIZE - n,
"frequency = %d Hz\n", p->frequency);
n += snprintf(&buf[n], PAGE_SIZE - n,
"transmission_mode = %d\t", p->transmission_mode);
n += snprintf(&buf[n], PAGE_SIZE - n,
"modem_state = %d\t\t", p->modem_state);
n += snprintf(&buf[n], PAGE_SIZE - n,
"guard_interval = %d\n", p->guard_interval);
n += snprintf(&buf[n], PAGE_SIZE - n,
"system_type = %d\t\t", p->system_type);
n += snprintf(&buf[n], PAGE_SIZE - n,
"partial_reception = %d\t", p->partial_reception);
n += snprintf(&buf[n], PAGE_SIZE - n,
"num_of_layers = %d\n", p->num_of_layers);
n += snprintf(&buf[n], PAGE_SIZE - n,
"sms_to_host_tx_errors = %d\n", p->sms_to_host_tx_errors);
for (i = 0; i < 3; i++) {
if (p->layer_info[i].number_of_segments < 1 ||
p->layer_info[i].number_of_segments > 13)
continue;
n += snprintf(&buf[n], PAGE_SIZE - n, "\nLayer %d\n", i);
n += snprintf(&buf[n], PAGE_SIZE - n, "\tcode_rate = %d\t",
p->layer_info[i].code_rate);
n += snprintf(&buf[n], PAGE_SIZE - n, "constellation = %d\n",
p->layer_info[i].constellation);
n += snprintf(&buf[n], PAGE_SIZE - n, "\tber = %-5d\t",
p->layer_info[i].ber);
n += snprintf(&buf[n], PAGE_SIZE - n, "\tber_error_count = %-5d\t",
p->layer_info[i].ber_error_count);
n += snprintf(&buf[n], PAGE_SIZE - n, "ber_bit_count = %-5d\n",
p->layer_info[i].ber_bit_count);
n += snprintf(&buf[n], PAGE_SIZE - n, "\tpre_ber = %-5d\t",
p->layer_info[i].pre_ber);
n += snprintf(&buf[n], PAGE_SIZE - n, "\tts_per = %-5d\n",
p->layer_info[i].ts_per);
n += snprintf(&buf[n], PAGE_SIZE - n, "\terror_ts_packets = %-5d\t",
p->layer_info[i].error_ts_packets);
n += snprintf(&buf[n], PAGE_SIZE - n, "total_ts_packets = %-5d\t",
p->layer_info[i].total_ts_packets);
n += snprintf(&buf[n], PAGE_SIZE - n, "ti_ldepth_i = %d\n",
p->layer_info[i].ti_ldepth_i);
n += snprintf(&buf[n], PAGE_SIZE - n,
"\tnumber_of_segments = %d\t",
p->layer_info[i].number_of_segments);
n += snprintf(&buf[n], PAGE_SIZE - n, "tmcc_errors = %d\n",
p->layer_info[i].tmcc_errors);
}
debug_data->stats_count = n;
spin_unlock(&debug_data->lock);
wake_up(&debug_data->stats_queue);
}
static void smsdvb_print_isdb_stats_ex(struct smsdvb_debugfs *debug_data,
struct sms_isdbt_stats_ex *p)
{
int i, n = 0;
char *buf;
spin_lock(&debug_data->lock);
if (debug_data->stats_count) {
spin_unlock(&debug_data->lock);
return;
}
buf = debug_data->stats_data;
n += snprintf(&buf[n], PAGE_SIZE - n,
"statistics_type = %d\t", p->statistics_type);
n += snprintf(&buf[n], PAGE_SIZE - n,
"full_size = %d\n", p->full_size);
n += snprintf(&buf[n], PAGE_SIZE - n,
"is_rf_locked = %d\t\t", p->is_rf_locked);
n += snprintf(&buf[n], PAGE_SIZE - n,
"is_demod_locked = %d\t", p->is_demod_locked);
n += snprintf(&buf[n], PAGE_SIZE - n,
"is_external_lna_on = %d\n", p->is_external_lna_on);
n += snprintf(&buf[n], PAGE_SIZE - n,
"SNR = %d dB\t\t", p->SNR);
n += snprintf(&buf[n], PAGE_SIZE - n,
"RSSI = %d dBm\t\t", p->RSSI);
n += snprintf(&buf[n], PAGE_SIZE - n,
"in_band_pwr = %d dBm\n", p->in_band_pwr);
n += snprintf(&buf[n], PAGE_SIZE - n,
"carrier_offset = %d\t", p->carrier_offset);
n += snprintf(&buf[n], PAGE_SIZE - n,
"bandwidth = %d\t\t", p->bandwidth);
n += snprintf(&buf[n], PAGE_SIZE - n,
"frequency = %d Hz\n", p->frequency);
n += snprintf(&buf[n], PAGE_SIZE - n,
"transmission_mode = %d\t", p->transmission_mode);
n += snprintf(&buf[n], PAGE_SIZE - n,
"modem_state = %d\t\t", p->modem_state);
n += snprintf(&buf[n], PAGE_SIZE - n,
"guard_interval = %d\n", p->guard_interval);
n += snprintf(&buf[n], PAGE_SIZE - n,
"system_type = %d\t\t", p->system_type);
n += snprintf(&buf[n], PAGE_SIZE - n,
"partial_reception = %d\t", p->partial_reception);
n += snprintf(&buf[n], PAGE_SIZE - n,
"num_of_layers = %d\n", p->num_of_layers);
n += snprintf(&buf[n], PAGE_SIZE - n, "segment_number = %d\t",
p->segment_number);
n += snprintf(&buf[n], PAGE_SIZE - n, "tune_bw = %d\n",
p->tune_bw);
for (i = 0; i < 3; i++) {
if (p->layer_info[i].number_of_segments < 1 ||
p->layer_info[i].number_of_segments > 13)
continue;
n += snprintf(&buf[n], PAGE_SIZE - n, "\nLayer %d\n", i);
n += snprintf(&buf[n], PAGE_SIZE - n, "\tcode_rate = %d\t",
p->layer_info[i].code_rate);
n += snprintf(&buf[n], PAGE_SIZE - n, "constellation = %d\n",
p->layer_info[i].constellation);
n += snprintf(&buf[n], PAGE_SIZE - n, "\tber = %-5d\t",
p->layer_info[i].ber);
n += snprintf(&buf[n], PAGE_SIZE - n, "\tber_error_count = %-5d\t",
p->layer_info[i].ber_error_count);
n += snprintf(&buf[n], PAGE_SIZE - n, "ber_bit_count = %-5d\n",
p->layer_info[i].ber_bit_count);
n += snprintf(&buf[n], PAGE_SIZE - n, "\tpre_ber = %-5d\t",
p->layer_info[i].pre_ber);
n += snprintf(&buf[n], PAGE_SIZE - n, "\tts_per = %-5d\n",
p->layer_info[i].ts_per);
n += snprintf(&buf[n], PAGE_SIZE - n, "\terror_ts_packets = %-5d\t",
p->layer_info[i].error_ts_packets);
n += snprintf(&buf[n], PAGE_SIZE - n, "total_ts_packets = %-5d\t",
p->layer_info[i].total_ts_packets);
n += snprintf(&buf[n], PAGE_SIZE - n, "ti_ldepth_i = %d\n",
p->layer_info[i].ti_ldepth_i);
n += snprintf(&buf[n], PAGE_SIZE - n,
"\tnumber_of_segments = %d\t",
p->layer_info[i].number_of_segments);
n += snprintf(&buf[n], PAGE_SIZE - n, "tmcc_errors = %d\n",
p->layer_info[i].tmcc_errors);
}
debug_data->stats_count = n;
spin_unlock(&debug_data->lock);
wake_up(&debug_data->stats_queue);
}
static int smsdvb_stats_open(struct inode *inode, struct file *file)
{
struct smsdvb_client_t *client = inode->i_private;
struct smsdvb_debugfs *debug_data = client->debug_data;
kref_get(&debug_data->refcount);
spin_lock(&debug_data->lock);
debug_data->stats_count = 0;
debug_data->stats_was_read = false;
spin_unlock(&debug_data->lock);
file->private_data = debug_data;
return 0;
}
static void smsdvb_debugfs_data_release(struct kref *ref)
{
struct smsdvb_debugfs *debug_data;
debug_data = container_of(ref, struct smsdvb_debugfs, refcount);
kfree(debug_data);
}
static int smsdvb_stats_wait_read(struct smsdvb_debugfs *debug_data)
{
int rc = 1;
spin_lock(&debug_data->lock);
if (debug_data->stats_was_read)
goto exit;
rc = debug_data->stats_count;
exit:
spin_unlock(&debug_data->lock);
return rc;
}
static __poll_t smsdvb_stats_poll(struct file *file, poll_table *wait)
{
struct smsdvb_debugfs *debug_data = file->private_data;
int rc;
kref_get(&debug_data->refcount);
poll_wait(file, &debug_data->stats_queue, wait);
rc = smsdvb_stats_wait_read(debug_data);
kref_put(&debug_data->refcount, smsdvb_debugfs_data_release);
return rc > 0 ? EPOLLIN | EPOLLRDNORM : 0;
}
static ssize_t smsdvb_stats_read(struct file *file, char __user *user_buf,
size_t nbytes, loff_t *ppos)
{
int rc = 0, len;
struct smsdvb_debugfs *debug_data = file->private_data;
kref_get(&debug_data->refcount);
if (file->f_flags & O_NONBLOCK) {
rc = smsdvb_stats_wait_read(debug_data);
if (!rc) {
rc = -EWOULDBLOCK;
goto ret;
}
} else {
rc = wait_event_interruptible(debug_data->stats_queue,
smsdvb_stats_wait_read(debug_data));
if (rc < 0)
goto ret;
}
if (debug_data->stats_was_read) {
rc = 0; /* EOF */
goto ret;
}
len = debug_data->stats_count - *ppos;
if (len >= 0)
rc = simple_read_from_buffer(user_buf, nbytes, ppos,
debug_data->stats_data, len);
else
rc = 0;
if (*ppos >= debug_data->stats_count) {
spin_lock(&debug_data->lock);
debug_data->stats_was_read = true;
spin_unlock(&debug_data->lock);
}
ret:
kref_put(&debug_data->refcount, smsdvb_debugfs_data_release);
return rc;
}
static int smsdvb_stats_release(struct inode *inode, struct file *file)
{
struct smsdvb_debugfs *debug_data = file->private_data;
spin_lock(&debug_data->lock);
debug_data->stats_was_read = true; /* return EOF to read() */
spin_unlock(&debug_data->lock);
wake_up_interruptible_sync(&debug_data->stats_queue);
kref_put(&debug_data->refcount, smsdvb_debugfs_data_release);
file->private_data = NULL;
return 0;
}
static const struct file_operations debugfs_stats_ops = {
.open = smsdvb_stats_open,
.poll = smsdvb_stats_poll,
.read = smsdvb_stats_read,
.release = smsdvb_stats_release,
.llseek = generic_file_llseek,
};
/*
* Functions used by smsdvb, in order to create the interfaces
*/
int smsdvb_debugfs_create(struct smsdvb_client_t *client)
{
struct smscore_device_t *coredev = client->coredev;
struct dentry *d;
struct smsdvb_debugfs *debug_data;
if (!smsdvb_debugfs_usb_root || !coredev->is_usb_device)
return -ENODEV;
client->debugfs = debugfs_create_dir(coredev->devpath,
smsdvb_debugfs_usb_root);
if (IS_ERR_OR_NULL(client->debugfs)) {
pr_info("Unable to create debugfs %s directory.\n",
coredev->devpath);
return -ENODEV;
}
d = debugfs_create_file("stats", S_IRUGO | S_IWUSR, client->debugfs,
client, &debugfs_stats_ops);
if (!d) {
debugfs_remove(client->debugfs);
return -ENOMEM;
}
debug_data = kzalloc(sizeof(*client->debug_data), GFP_KERNEL);
if (!debug_data)
return -ENOMEM;
client->debug_data = debug_data;
client->prt_dvb_stats = smsdvb_print_dvb_stats;
client->prt_isdb_stats = smsdvb_print_isdb_stats;
client->prt_isdb_stats_ex = smsdvb_print_isdb_stats_ex;
init_waitqueue_head(&debug_data->stats_queue);
spin_lock_init(&debug_data->lock);
kref_init(&debug_data->refcount);
return 0;
}
void smsdvb_debugfs_release(struct smsdvb_client_t *client)
{
if (!client->debugfs)
return;
client->prt_dvb_stats = NULL;
client->prt_isdb_stats = NULL;
client->prt_isdb_stats_ex = NULL;
debugfs_remove_recursive(client->debugfs);
kref_put(&client->debug_data->refcount, smsdvb_debugfs_data_release);
client->debug_data = NULL;
client->debugfs = NULL;
}
int smsdvb_debugfs_register(void)
{
struct dentry *d;
/*
* FIXME: This was written to debug Siano USB devices. So, it creates
* the debugfs node under <debugfs>/usb.
* A similar logic would be needed for Siano sdio devices, but, in that
* case, usb_debug_root is not a good choice.
*
* Perhaps the right fix here would be to create another sysfs root
* node for sdio-based boards, but this may need some logic at sdio
* subsystem.
*/
d = debugfs_create_dir("smsdvb", usb_debug_root);
if (IS_ERR_OR_NULL(d)) {
pr_err("Couldn't create sysfs node for smsdvb\n");
return PTR_ERR(d);
} else {
smsdvb_debugfs_usb_root = d;
}
return 0;
}
void smsdvb_debugfs_unregister(void)
{
debugfs_remove_recursive(smsdvb_debugfs_usb_root);
smsdvb_debugfs_usb_root = NULL;
}
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