cregit-Linux how code gets into the kernel

Release 4.11 drivers/net/wireless/ath/ath9k/dfs_debug.c

/*
 * Copyright (c) 2008-2011 Atheros Communications Inc.
 * Copyright (c) 2011 Neratec Solutions AG
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <linux/debugfs.h>
#include <linux/export.h>

#include "ath9k.h"
#include "dfs_debug.h"
#include "../dfs_pattern_detector.h"


static struct ath_dfs_pool_stats dfs_pool_stats = { 0 };


#define ATH9K_DFS_STAT(s, p) \
	len += scnprintf(buf + len, size - len, "%28s : %10u\n", s, \
                         sc->debug.stats.dfs_stats.p);

#define ATH9K_DFS_POOL_STAT(s, p) \
	len += scnprintf(buf + len, size - len, "%28s : %10u\n", s, \
                         dfs_pool_stats.p);


static ssize_t read_file_dfs(struct file *file, char __user *user_buf, size_t count, loff_t *ppos) { struct ath_softc *sc = file->private_data; struct ath9k_hw_version *hw_ver = &sc->sc_ah->hw_version; char *buf; unsigned int len = 0, size = 8000; ssize_t retval = 0; buf = kzalloc(size, GFP_KERNEL); if (buf == NULL) return -ENOMEM; len += scnprintf(buf + len, size - len, "DFS support for " "macVersion = 0x%x, macRev = 0x%x: %s\n", hw_ver->macVersion, hw_ver->macRev, (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_DFS) ? "enabled" : "disabled"); if (!sc->dfs_detector) { len += scnprintf(buf + len, size - len, "DFS detector not enabled\n"); goto exit; } dfs_pool_stats = sc->dfs_detector->get_stats(sc->dfs_detector); len += scnprintf(buf + len, size - len, "Pulse detector statistics:\n"); ATH9K_DFS_STAT("pulse events reported ", pulses_total); ATH9K_DFS_STAT("invalid pulse events ", pulses_no_dfs); ATH9K_DFS_STAT("DFS pulses detected ", pulses_detected); ATH9K_DFS_STAT("Datalen discards ", datalen_discards); ATH9K_DFS_STAT("RSSI discards ", rssi_discards); ATH9K_DFS_STAT("BW info discards ", bwinfo_discards); ATH9K_DFS_STAT("Primary channel pulses ", pri_phy_errors); ATH9K_DFS_STAT("Secondary channel pulses", ext_phy_errors); ATH9K_DFS_STAT("Dual channel pulses ", dc_phy_errors); len += scnprintf(buf + len, size - len, "Radar detector statistics " "(current DFS region: %d)\n", sc->dfs_detector->region); ATH9K_DFS_STAT("Pulse events processed ", pulses_processed); ATH9K_DFS_STAT("Radars detected ", radar_detected); len += scnprintf(buf + len, size - len, "Global Pool statistics:\n"); ATH9K_DFS_POOL_STAT("Pool references ", pool_reference); ATH9K_DFS_POOL_STAT("Pulses allocated ", pulse_allocated); ATH9K_DFS_POOL_STAT("Pulses alloc error ", pulse_alloc_error); ATH9K_DFS_POOL_STAT("Pulses in use ", pulse_used); ATH9K_DFS_POOL_STAT("Seqs. allocated ", pseq_allocated); ATH9K_DFS_POOL_STAT("Seqs. alloc error ", pseq_alloc_error); ATH9K_DFS_POOL_STAT("Seqs. in use ", pseq_used); exit: if (len > size) len = size; retval = simple_read_from_buffer(user_buf, count, ppos, buf, len); kfree(buf); return retval; }

Contributors

PersonTokensPropCommitsCommitProp
Zefir Kurtisi33388.80%375.00%
Janusz Dziedzic4211.20%125.00%
Total375100.00%4100.00%

/* magic number to prevent accidental reset of DFS statistics */ #define DFS_STATS_RESET_MAGIC 0x80000000
static ssize_t write_file_dfs(struct file *file, const char __user *user_buf, size_t count, loff_t *ppos) { struct ath_softc *sc = file->private_data; unsigned long val; char buf[32]; ssize_t len; len = min(count, sizeof(buf) - 1); if (copy_from_user(buf, user_buf, len)) return -EFAULT; buf[len] = '\0'; if (kstrtoul(buf, 0, &val)) return -EINVAL; if (val == DFS_STATS_RESET_MAGIC) memset(&sc->debug.stats.dfs_stats, 0, sizeof(sc->debug.stats.dfs_stats)); return count; }

Contributors

PersonTokensPropCommitsCommitProp
Zefir Kurtisi13199.24%150.00%
Jingoo Han10.76%150.00%
Total132100.00%2100.00%


static ssize_t write_file_simulate_radar(struct file *file, const char __user *user_buf, size_t count, loff_t *ppos) { struct ath_softc *sc = file->private_data; ieee80211_radar_detected(sc->hw); return count; }

Contributors

PersonTokensPropCommitsCommitProp
Zefir Kurtisi43100.00%1100.00%
Total43100.00%1100.00%

static const struct file_operations fops_simulate_radar = { .write = write_file_simulate_radar, .open = simple_open, .owner = THIS_MODULE, .llseek = default_llseek, }; static const struct file_operations fops_dfs_stats = { .read = read_file_dfs, .write = write_file_dfs, .open = simple_open, .owner = THIS_MODULE, .llseek = default_llseek, };
void ath9k_dfs_init_debug(struct ath_softc *sc) { debugfs_create_file("dfs_stats", S_IRUSR, sc->debug.debugfs_phy, sc, &fops_dfs_stats); debugfs_create_file("dfs_simulate_radar", S_IWUSR, sc->debug.debugfs_phy, sc, &fops_simulate_radar); }

Contributors

PersonTokensPropCommitsCommitProp
Zefir Kurtisi46100.00%2100.00%
Total46100.00%2100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Zefir Kurtisi65792.93%444.44%
Janusz Dziedzic486.79%333.33%
Stephen Boyd10.14%111.11%
Jingoo Han10.14%111.11%
Total707100.00%9100.00%
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