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linux/drivers/net/wireless/wl12xx/debugfs.c
Ido Yariv a620865edf wl12xx: Switch to a threaded interrupt handler 
To achieve maximal throughput, it is very important to react to
interrupts as soon as possible. Currently the interrupt handler wakes up
a worker for handling interrupts in process context. A cleaner and more
efficient design would be to request a threaded interrupt handler.  This
handler's priority is very high, and can do blocking operations such as
SDIO/SPI transactions.

Some work can be deferred, mostly calls to mac80211 APIs
(ieee80211_rx_ni and ieee80211_tx_status). By deferring such work to a
different worker, we can keep the irq handler thread more I/O
responsive. In addition, on multi-core systems the two threads can be
scheduled on different cores, which will improve overall performance.

The use of WL1271_FLAG_IRQ_PENDING & WL1271_FLAG_IRQ_RUNNING was
changed. For simplicity, always query the FW for more pending
interrupts. Since there are relatively long bursts of interrupts, the
extra FW status read overhead is negligible. In addition, this enables
registering the IRQ handler with the ONESHOT option.

Signed-off-by: Ido Yariv <ido@wizery.com>
Reviewed-by: Luciano Coelho <coelho@ti.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>
2011-03-03 16:10:46 +02:00

470 lines
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/*
* This file is part of wl1271
*
* Copyright (C) 2009 Nokia Corporation
*
* Contact: Luciano Coelho <luciano.coelho@nokia.com>
*
* 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.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#include "debugfs.h"
#include <linux/skbuff.h>
#include <linux/slab.h>
#include "wl12xx.h"
#include "acx.h"
#include "ps.h"
#include "io.h"
/* ms */
#define WL1271_DEBUGFS_STATS_LIFETIME 1000
/* debugfs macros idea from mac80211 */
#define DEBUGFS_FORMAT_BUFFER_SIZE 100
static int wl1271_format_buffer(char __user *userbuf, size_t count,
loff_t *ppos, char *fmt, ...)
{
va_list args;
char buf[DEBUGFS_FORMAT_BUFFER_SIZE];
int res;
va_start(args, fmt);
res = vscnprintf(buf, sizeof(buf), fmt, args);
va_end(args);
return simple_read_from_buffer(userbuf, count, ppos, buf, res);
}
#define DEBUGFS_READONLY_FILE(name, fmt, value...) \
static ssize_t name## _read(struct file *file, char __user *userbuf, \
size_t count, loff_t *ppos) \
{ \
struct wl1271 *wl = file->private_data; \
return wl1271_format_buffer(userbuf, count, ppos, \
fmt "\n", ##value); \
} \
\
static const struct file_operations name## _ops = { \
.read = name## _read, \
.open = wl1271_open_file_generic, \
.llseek = generic_file_llseek, \
};
#define DEBUGFS_ADD(name, parent) \
entry = debugfs_create_file(#name, 0400, parent, \
wl, &name## _ops); \
if (!entry || IS_ERR(entry)) \
goto err; \
#define DEBUGFS_FWSTATS_FILE(sub, name, fmt) \
static ssize_t sub## _ ##name## _read(struct file *file, \
char __user *userbuf, \
size_t count, loff_t *ppos) \
{ \
struct wl1271 *wl = file->private_data; \
\
wl1271_debugfs_update_stats(wl); \
\
return wl1271_format_buffer(userbuf, count, ppos, fmt "\n", \
wl->stats.fw_stats->sub.name); \
} \
\
static const struct file_operations sub## _ ##name## _ops = { \
.read = sub## _ ##name## _read, \
.open = wl1271_open_file_generic, \
.llseek = generic_file_llseek, \
};
#define DEBUGFS_FWSTATS_ADD(sub, name) \
DEBUGFS_ADD(sub## _ ##name, stats)
static void wl1271_debugfs_update_stats(struct wl1271 *wl)
{
int ret;
mutex_lock(&wl->mutex);
ret = wl1271_ps_elp_wakeup(wl);
if (ret < 0)
goto out;
if (wl->state == WL1271_STATE_ON &&
time_after(jiffies, wl->stats.fw_stats_update +
msecs_to_jiffies(WL1271_DEBUGFS_STATS_LIFETIME))) {
wl1271_acx_statistics(wl, wl->stats.fw_stats);
wl->stats.fw_stats_update = jiffies;
}
wl1271_ps_elp_sleep(wl);
out:
mutex_unlock(&wl->mutex);
}
static int wl1271_open_file_generic(struct inode *inode, struct file *file)
{
file->private_data = inode->i_private;
return 0;
}
DEBUGFS_FWSTATS_FILE(tx, internal_desc_overflow, "%u");
DEBUGFS_FWSTATS_FILE(rx, out_of_mem, "%u");
DEBUGFS_FWSTATS_FILE(rx, hdr_overflow, "%u");
DEBUGFS_FWSTATS_FILE(rx, hw_stuck, "%u");
DEBUGFS_FWSTATS_FILE(rx, dropped, "%u");
DEBUGFS_FWSTATS_FILE(rx, fcs_err, "%u");
DEBUGFS_FWSTATS_FILE(rx, xfr_hint_trig, "%u");
DEBUGFS_FWSTATS_FILE(rx, path_reset, "%u");
DEBUGFS_FWSTATS_FILE(rx, reset_counter, "%u");
DEBUGFS_FWSTATS_FILE(dma, rx_requested, "%u");
DEBUGFS_FWSTATS_FILE(dma, rx_errors, "%u");
DEBUGFS_FWSTATS_FILE(dma, tx_requested, "%u");
DEBUGFS_FWSTATS_FILE(dma, tx_errors, "%u");
DEBUGFS_FWSTATS_FILE(isr, cmd_cmplt, "%u");
DEBUGFS_FWSTATS_FILE(isr, fiqs, "%u");
DEBUGFS_FWSTATS_FILE(isr, rx_headers, "%u");
DEBUGFS_FWSTATS_FILE(isr, rx_mem_overflow, "%u");
DEBUGFS_FWSTATS_FILE(isr, rx_rdys, "%u");
DEBUGFS_FWSTATS_FILE(isr, irqs, "%u");
DEBUGFS_FWSTATS_FILE(isr, tx_procs, "%u");
DEBUGFS_FWSTATS_FILE(isr, decrypt_done, "%u");
DEBUGFS_FWSTATS_FILE(isr, dma0_done, "%u");
DEBUGFS_FWSTATS_FILE(isr, dma1_done, "%u");
DEBUGFS_FWSTATS_FILE(isr, tx_exch_complete, "%u");
DEBUGFS_FWSTATS_FILE(isr, commands, "%u");
DEBUGFS_FWSTATS_FILE(isr, rx_procs, "%u");
DEBUGFS_FWSTATS_FILE(isr, hw_pm_mode_changes, "%u");
DEBUGFS_FWSTATS_FILE(isr, host_acknowledges, "%u");
DEBUGFS_FWSTATS_FILE(isr, pci_pm, "%u");
DEBUGFS_FWSTATS_FILE(isr, wakeups, "%u");
DEBUGFS_FWSTATS_FILE(isr, low_rssi, "%u");
DEBUGFS_FWSTATS_FILE(wep, addr_key_count, "%u");
DEBUGFS_FWSTATS_FILE(wep, default_key_count, "%u");
/* skipping wep.reserved */
DEBUGFS_FWSTATS_FILE(wep, key_not_found, "%u");
DEBUGFS_FWSTATS_FILE(wep, decrypt_fail, "%u");
DEBUGFS_FWSTATS_FILE(wep, packets, "%u");
DEBUGFS_FWSTATS_FILE(wep, interrupt, "%u");
DEBUGFS_FWSTATS_FILE(pwr, ps_enter, "%u");
DEBUGFS_FWSTATS_FILE(pwr, elp_enter, "%u");
DEBUGFS_FWSTATS_FILE(pwr, missing_bcns, "%u");
DEBUGFS_FWSTATS_FILE(pwr, wake_on_host, "%u");
DEBUGFS_FWSTATS_FILE(pwr, wake_on_timer_exp, "%u");
DEBUGFS_FWSTATS_FILE(pwr, tx_with_ps, "%u");
DEBUGFS_FWSTATS_FILE(pwr, tx_without_ps, "%u");
DEBUGFS_FWSTATS_FILE(pwr, rcvd_beacons, "%u");
DEBUGFS_FWSTATS_FILE(pwr, power_save_off, "%u");
DEBUGFS_FWSTATS_FILE(pwr, enable_ps, "%u");
DEBUGFS_FWSTATS_FILE(pwr, disable_ps, "%u");
DEBUGFS_FWSTATS_FILE(pwr, fix_tsf_ps, "%u");
/* skipping cont_miss_bcns_spread for now */
DEBUGFS_FWSTATS_FILE(pwr, rcvd_awake_beacons, "%u");
DEBUGFS_FWSTATS_FILE(mic, rx_pkts, "%u");
DEBUGFS_FWSTATS_FILE(mic, calc_failure, "%u");
DEBUGFS_FWSTATS_FILE(aes, encrypt_fail, "%u");
DEBUGFS_FWSTATS_FILE(aes, decrypt_fail, "%u");
DEBUGFS_FWSTATS_FILE(aes, encrypt_packets, "%u");
DEBUGFS_FWSTATS_FILE(aes, decrypt_packets, "%u");
DEBUGFS_FWSTATS_FILE(aes, encrypt_interrupt, "%u");
DEBUGFS_FWSTATS_FILE(aes, decrypt_interrupt, "%u");
DEBUGFS_FWSTATS_FILE(event, heart_beat, "%u");
DEBUGFS_FWSTATS_FILE(event, calibration, "%u");
DEBUGFS_FWSTATS_FILE(event, rx_mismatch, "%u");
DEBUGFS_FWSTATS_FILE(event, rx_mem_empty, "%u");
DEBUGFS_FWSTATS_FILE(event, rx_pool, "%u");
DEBUGFS_FWSTATS_FILE(event, oom_late, "%u");
DEBUGFS_FWSTATS_FILE(event, phy_transmit_error, "%u");
DEBUGFS_FWSTATS_FILE(event, tx_stuck, "%u");
DEBUGFS_FWSTATS_FILE(ps, pspoll_timeouts, "%u");
DEBUGFS_FWSTATS_FILE(ps, upsd_timeouts, "%u");
DEBUGFS_FWSTATS_FILE(ps, upsd_max_sptime, "%u");
DEBUGFS_FWSTATS_FILE(ps, upsd_max_apturn, "%u");
DEBUGFS_FWSTATS_FILE(ps, pspoll_max_apturn, "%u");
DEBUGFS_FWSTATS_FILE(ps, pspoll_utilization, "%u");
DEBUGFS_FWSTATS_FILE(ps, upsd_utilization, "%u");
DEBUGFS_FWSTATS_FILE(rxpipe, rx_prep_beacon_drop, "%u");
DEBUGFS_FWSTATS_FILE(rxpipe, descr_host_int_trig_rx_data, "%u");
DEBUGFS_FWSTATS_FILE(rxpipe, beacon_buffer_thres_host_int_trig_rx_data, "%u");
DEBUGFS_FWSTATS_FILE(rxpipe, missed_beacon_host_int_trig_rx_data, "%u");
DEBUGFS_FWSTATS_FILE(rxpipe, tx_xfr_host_int_trig_rx_data, "%u");
DEBUGFS_READONLY_FILE(retry_count, "%u", wl->stats.retry_count);
DEBUGFS_READONLY_FILE(excessive_retries, "%u",
wl->stats.excessive_retries);
static ssize_t tx_queue_len_read(struct file *file, char __user *userbuf,
size_t count, loff_t *ppos)
{
struct wl1271 *wl = file->private_data;
u32 queue_len;
char buf[20];
int res;
queue_len = wl->tx_queue_count;
res = scnprintf(buf, sizeof(buf), "%u\n", queue_len);
return simple_read_from_buffer(userbuf, count, ppos, buf, res);
}
static const struct file_operations tx_queue_len_ops = {
.read = tx_queue_len_read,
.open = wl1271_open_file_generic,
.llseek = default_llseek,
};
static ssize_t gpio_power_read(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
struct wl1271 *wl = file->private_data;
bool state = test_bit(WL1271_FLAG_GPIO_POWER, &wl->flags);
int res;
char buf[10];
res = scnprintf(buf, sizeof(buf), "%d\n", state);
return simple_read_from_buffer(user_buf, count, ppos, buf, res);
}
static ssize_t gpio_power_write(struct file *file,
const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct wl1271 *wl = file->private_data;
char buf[10];
size_t len;
unsigned long value;
int ret;
len = min(count, sizeof(buf) - 1);
if (copy_from_user(buf, user_buf, len)) {
return -EFAULT;
}
buf[len] = '\0';
ret = strict_strtoul(buf, 0, &value);
if (ret < 0) {
wl1271_warning("illegal value in gpio_power");
return -EINVAL;
}
mutex_lock(&wl->mutex);
if (value)
wl1271_power_on(wl);
else
wl1271_power_off(wl);
mutex_unlock(&wl->mutex);
return count;
}
static const struct file_operations gpio_power_ops = {
.read = gpio_power_read,
.write = gpio_power_write,
.open = wl1271_open_file_generic,
.llseek = default_llseek,
};
static int wl1271_debugfs_add_files(struct wl1271 *wl,
struct dentry *rootdir)
{
int ret = 0;
struct dentry *entry, *stats;
stats = debugfs_create_dir("fw-statistics", rootdir);
if (!stats || IS_ERR(stats)) {
entry = stats;
goto err;
}
DEBUGFS_FWSTATS_ADD(tx, internal_desc_overflow);
DEBUGFS_FWSTATS_ADD(rx, out_of_mem);
DEBUGFS_FWSTATS_ADD(rx, hdr_overflow);
DEBUGFS_FWSTATS_ADD(rx, hw_stuck);
DEBUGFS_FWSTATS_ADD(rx, dropped);
DEBUGFS_FWSTATS_ADD(rx, fcs_err);
DEBUGFS_FWSTATS_ADD(rx, xfr_hint_trig);
DEBUGFS_FWSTATS_ADD(rx, path_reset);
DEBUGFS_FWSTATS_ADD(rx, reset_counter);
DEBUGFS_FWSTATS_ADD(dma, rx_requested);
DEBUGFS_FWSTATS_ADD(dma, rx_errors);
DEBUGFS_FWSTATS_ADD(dma, tx_requested);
DEBUGFS_FWSTATS_ADD(dma, tx_errors);
DEBUGFS_FWSTATS_ADD(isr, cmd_cmplt);
DEBUGFS_FWSTATS_ADD(isr, fiqs);
DEBUGFS_FWSTATS_ADD(isr, rx_headers);
DEBUGFS_FWSTATS_ADD(isr, rx_mem_overflow);
DEBUGFS_FWSTATS_ADD(isr, rx_rdys);
DEBUGFS_FWSTATS_ADD(isr, irqs);
DEBUGFS_FWSTATS_ADD(isr, tx_procs);
DEBUGFS_FWSTATS_ADD(isr, decrypt_done);
DEBUGFS_FWSTATS_ADD(isr, dma0_done);
DEBUGFS_FWSTATS_ADD(isr, dma1_done);
DEBUGFS_FWSTATS_ADD(isr, tx_exch_complete);
DEBUGFS_FWSTATS_ADD(isr, commands);
DEBUGFS_FWSTATS_ADD(isr, rx_procs);
DEBUGFS_FWSTATS_ADD(isr, hw_pm_mode_changes);
DEBUGFS_FWSTATS_ADD(isr, host_acknowledges);
DEBUGFS_FWSTATS_ADD(isr, pci_pm);
DEBUGFS_FWSTATS_ADD(isr, wakeups);
DEBUGFS_FWSTATS_ADD(isr, low_rssi);
DEBUGFS_FWSTATS_ADD(wep, addr_key_count);
DEBUGFS_FWSTATS_ADD(wep, default_key_count);
/* skipping wep.reserved */
DEBUGFS_FWSTATS_ADD(wep, key_not_found);
DEBUGFS_FWSTATS_ADD(wep, decrypt_fail);
DEBUGFS_FWSTATS_ADD(wep, packets);
DEBUGFS_FWSTATS_ADD(wep, interrupt);
DEBUGFS_FWSTATS_ADD(pwr, ps_enter);
DEBUGFS_FWSTATS_ADD(pwr, elp_enter);
DEBUGFS_FWSTATS_ADD(pwr, missing_bcns);
DEBUGFS_FWSTATS_ADD(pwr, wake_on_host);
DEBUGFS_FWSTATS_ADD(pwr, wake_on_timer_exp);
DEBUGFS_FWSTATS_ADD(pwr, tx_with_ps);
DEBUGFS_FWSTATS_ADD(pwr, tx_without_ps);
DEBUGFS_FWSTATS_ADD(pwr, rcvd_beacons);
DEBUGFS_FWSTATS_ADD(pwr, power_save_off);
DEBUGFS_FWSTATS_ADD(pwr, enable_ps);
DEBUGFS_FWSTATS_ADD(pwr, disable_ps);
DEBUGFS_FWSTATS_ADD(pwr, fix_tsf_ps);
/* skipping cont_miss_bcns_spread for now */
DEBUGFS_FWSTATS_ADD(pwr, rcvd_awake_beacons);
DEBUGFS_FWSTATS_ADD(mic, rx_pkts);
DEBUGFS_FWSTATS_ADD(mic, calc_failure);
DEBUGFS_FWSTATS_ADD(aes, encrypt_fail);
DEBUGFS_FWSTATS_ADD(aes, decrypt_fail);
DEBUGFS_FWSTATS_ADD(aes, encrypt_packets);
DEBUGFS_FWSTATS_ADD(aes, decrypt_packets);
DEBUGFS_FWSTATS_ADD(aes, encrypt_interrupt);
DEBUGFS_FWSTATS_ADD(aes, decrypt_interrupt);
DEBUGFS_FWSTATS_ADD(event, heart_beat);
DEBUGFS_FWSTATS_ADD(event, calibration);
DEBUGFS_FWSTATS_ADD(event, rx_mismatch);
DEBUGFS_FWSTATS_ADD(event, rx_mem_empty);
DEBUGFS_FWSTATS_ADD(event, rx_pool);
DEBUGFS_FWSTATS_ADD(event, oom_late);
DEBUGFS_FWSTATS_ADD(event, phy_transmit_error);
DEBUGFS_FWSTATS_ADD(event, tx_stuck);
DEBUGFS_FWSTATS_ADD(ps, pspoll_timeouts);
DEBUGFS_FWSTATS_ADD(ps, upsd_timeouts);
DEBUGFS_FWSTATS_ADD(ps, upsd_max_sptime);
DEBUGFS_FWSTATS_ADD(ps, upsd_max_apturn);
DEBUGFS_FWSTATS_ADD(ps, pspoll_max_apturn);
DEBUGFS_FWSTATS_ADD(ps, pspoll_utilization);
DEBUGFS_FWSTATS_ADD(ps, upsd_utilization);
DEBUGFS_FWSTATS_ADD(rxpipe, rx_prep_beacon_drop);
DEBUGFS_FWSTATS_ADD(rxpipe, descr_host_int_trig_rx_data);
DEBUGFS_FWSTATS_ADD(rxpipe, beacon_buffer_thres_host_int_trig_rx_data);
DEBUGFS_FWSTATS_ADD(rxpipe, missed_beacon_host_int_trig_rx_data);
DEBUGFS_FWSTATS_ADD(rxpipe, tx_xfr_host_int_trig_rx_data);
DEBUGFS_ADD(tx_queue_len, rootdir);
DEBUGFS_ADD(retry_count, rootdir);
DEBUGFS_ADD(excessive_retries, rootdir);
DEBUGFS_ADD(gpio_power, rootdir);
return 0;
err:
if (IS_ERR(entry))
ret = PTR_ERR(entry);
else
ret = -ENOMEM;
return ret;
}
void wl1271_debugfs_reset(struct wl1271 *wl)
{
if (!wl->stats.fw_stats)
return;
memset(wl->stats.fw_stats, 0, sizeof(*wl->stats.fw_stats));
wl->stats.retry_count = 0;
wl->stats.excessive_retries = 0;
}
int wl1271_debugfs_init(struct wl1271 *wl)
{
int ret;
struct dentry *rootdir;
rootdir = debugfs_create_dir(KBUILD_MODNAME,
wl->hw->wiphy->debugfsdir);
if (IS_ERR(rootdir)) {
ret = PTR_ERR(rootdir);
goto err;
}
wl->stats.fw_stats = kzalloc(sizeof(*wl->stats.fw_stats),
GFP_KERNEL);
if (!wl->stats.fw_stats) {
ret = -ENOMEM;
goto err_fw;
}
wl->stats.fw_stats_update = jiffies;
ret = wl1271_debugfs_add_files(wl, rootdir);
if (ret < 0)
goto err_file;
return 0;
err_file:
kfree(wl->stats.fw_stats);
wl->stats.fw_stats = NULL;
err_fw:
debugfs_remove_recursive(rootdir);
err:
return ret;
}
void wl1271_debugfs_exit(struct wl1271 *wl)
{
kfree(wl->stats.fw_stats);
wl->stats.fw_stats = NULL;
}
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