#define DEBUGFS_FORMAT_BUFFER_SIZE 100
-#define TX_LATENCY_BIN_DELIMTER_C ','
-#define TX_LATENCY_BIN_DELIMTER_S ","
-#define TX_LATENCY_BINS_DISABLED "enable(bins disabled)\n"
-#define TX_LATENCY_DISABLED "disable\n"
-
-
-/*
- * Display if Tx latency statistics & bins are enabled/disabled
- */
-static ssize_t sta_tx_latency_stat_read(struct file *file,
- char __user *userbuf,
- size_t count, loff_t *ppos)
-{
- struct ieee80211_local *local = file->private_data;
- struct ieee80211_tx_latency_bin_ranges *tx_latency;
- char *buf;
- int bufsz, i, ret;
- int pos = 0;
-
- rcu_read_lock();
-
- tx_latency = rcu_dereference(local->tx_latency);
-
- if (tx_latency && tx_latency->n_ranges) {
- bufsz = tx_latency->n_ranges * 15;
- buf = kzalloc(bufsz, GFP_ATOMIC);
- if (!buf)
- goto err;
-
- for (i = 0; i < tx_latency->n_ranges; i++)
- pos += scnprintf(buf + pos, bufsz - pos, "%d,",
- tx_latency->ranges[i]);
- pos += scnprintf(buf + pos, bufsz - pos, "\n");
- } else if (tx_latency) {
- bufsz = sizeof(TX_LATENCY_BINS_DISABLED) + 1;
- buf = kzalloc(bufsz, GFP_ATOMIC);
- if (!buf)
- goto err;
-
- pos += scnprintf(buf + pos, bufsz - pos, "%s\n",
- TX_LATENCY_BINS_DISABLED);
- } else {
- bufsz = sizeof(TX_LATENCY_DISABLED) + 1;
- buf = kzalloc(bufsz, GFP_ATOMIC);
- if (!buf)
- goto err;
-
- pos += scnprintf(buf + pos, bufsz - pos, "%s\n",
- TX_LATENCY_DISABLED);
- }
-
- rcu_read_unlock();
-
- ret = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
- kfree(buf);
-
- return ret;
-err:
- rcu_read_unlock();
- return -ENOMEM;
-}
-
-/*
- * Receive input from user regarding Tx latency statistics
- * The input should indicate if Tx latency statistics and bins are
- * enabled/disabled.
- * If bins are enabled input should indicate the amount of different bins and
- * their ranges. Each bin will count how many Tx frames transmitted within the
- * appropriate latency.
- * Legal input is:
- * a) "enable(bins disabled)" - to enable only general statistics
- * b) "a,b,c,d,...z" - to enable general statistics and bins, where all are
- * numbers and a < b < c < d.. < z
- * c) "disable" - disable all statistics
- * NOTE: must configure Tx latency statistics bins before stations connected.
- */
-
-static ssize_t sta_tx_latency_stat_write(struct file *file,
- const char __user *userbuf,
- size_t count, loff_t *ppos)
-{
- struct ieee80211_local *local = file->private_data;
- char buf[128] = {};
- char *bins = buf;
- char *token;
- int buf_size, i, alloc_size;
- int prev_bin = 0;
- int n_ranges = 0;
- int ret = count;
- struct ieee80211_tx_latency_bin_ranges *tx_latency;
-
- if (sizeof(buf) <= count)
- return -EINVAL;
- buf_size = count;
- if (copy_from_user(buf, userbuf, buf_size))
- return -EFAULT;
-
- mutex_lock(&local->sta_mtx);
-
- /* cannot change config once we have stations */
- if (local->num_sta)
- goto unlock;
-
- tx_latency =
- rcu_dereference_protected(local->tx_latency,
- lockdep_is_held(&local->sta_mtx));
-
- /* disable Tx statistics */
- if (!strcmp(buf, TX_LATENCY_DISABLED)) {
- if (!tx_latency)
- goto unlock;
- RCU_INIT_POINTER(local->tx_latency, NULL);
- synchronize_rcu();
- kfree(tx_latency);
- goto unlock;
- }
-
- /* Tx latency already enabled */
- if (tx_latency)
- goto unlock;
-
- if (strcmp(TX_LATENCY_BINS_DISABLED, buf)) {
- /* check how many bins and between what ranges user requested */
- token = buf;
- while (*token != '\0') {
- if (*token == TX_LATENCY_BIN_DELIMTER_C)
- n_ranges++;
- token++;
- }
- n_ranges++;
- }
-
- alloc_size = sizeof(struct ieee80211_tx_latency_bin_ranges) +
- n_ranges * sizeof(u32);
- tx_latency = kzalloc(alloc_size, GFP_ATOMIC);
- if (!tx_latency) {
- ret = -ENOMEM;
- goto unlock;
- }
- tx_latency->n_ranges = n_ranges;
- for (i = 0; i < n_ranges; i++) { /* setting bin ranges */
- token = strsep(&bins, TX_LATENCY_BIN_DELIMTER_S);
- sscanf(token, "%d", &tx_latency->ranges[i]);
- /* bins values should be in ascending order */
- if (prev_bin >= tx_latency->ranges[i]) {
- ret = -EINVAL;
- kfree(tx_latency);
- goto unlock;
- }
- prev_bin = tx_latency->ranges[i];
- }
- rcu_assign_pointer(local->tx_latency, tx_latency);
-
-unlock:
- mutex_unlock(&local->sta_mtx);
-
- return ret;
-}
-
-static const struct file_operations stats_tx_latency_ops = {
- .write = sta_tx_latency_stat_write,
- .read = sta_tx_latency_stat_read,
- .open = simple_open,
- .llseek = generic_file_llseek,
-};
-
int mac80211_format_buffer(char __user *userbuf, size_t count,
loff_t *ppos, char *fmt, ...)
{
#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
DEBUGFS_STATS_ADD(tx_handlers_drop, local->tx_handlers_drop);
DEBUGFS_STATS_ADD(tx_handlers_queued, local->tx_handlers_queued);
- DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted,
- local->tx_handlers_drop_unencrypted);
DEBUGFS_STATS_ADD(tx_handlers_drop_fragment,
local->tx_handlers_drop_fragment);
DEBUGFS_STATS_ADD(tx_handlers_drop_wep,
DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);
DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);
DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);
-
- DEBUGFS_DEVSTATS_ADD(tx_latency);
}
git.openpandora.org / pandora-kernel.git / blobdiff