Commit 141b03e0 authored by Wey-Yi Guy's avatar Wey-Yi Guy Committed by John W. Linville
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iwlwifi: tx/rx queue pointer information



Adding debugfs function to show current TxFifo/RxFifo read/write
pointer, plus the current tx queue status (wake/stop) for both real and
virtual queue.
This is part of debug feature set to help debugging driver/uCode.

use tx_queue and rx_queue in
/sys/kernel/debug/ieee80211/phy0/iwlagn/debug directory to show the
current read/write pointer for both TxFifo and RxFifo queue
Signed-off-by: default avatarWey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: default avatarReinette Chatre <reinette.chatre@intel.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 22fdf3c9
......@@ -98,6 +98,8 @@ struct iwl_debugfs {
struct dentry *file_rx_statistics;
struct dentry *file_tx_statistics;
struct dentry *file_traffic_log;
struct dentry *file_rx_queue;
struct dentry *file_tx_queue;
} dbgfs_debug_files;
u32 sram_offset;
u32 sram_len;
......
......@@ -887,9 +887,74 @@ static ssize_t iwl_dbgfs_traffic_log_write(struct file *file,
return count;
}
static ssize_t iwl_dbgfs_tx_queue_read(struct file *file,
char __user *user_buf,
size_t count, loff_t *ppos) {
struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
struct iwl_tx_queue *txq;
struct iwl_queue *q;
char *buf;
int pos = 0;
int cnt;
int ret;
const size_t bufsz = sizeof(char) * 60 * IWL_MAX_NUM_QUEUES;
buf = kzalloc(bufsz, GFP_KERNEL);
if (!buf)
return -ENOMEM;
for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
txq = &priv->txq[cnt];
q = &txq->q;
pos += scnprintf(buf + pos, bufsz - pos,
"hwq %.2d: read=%u write=%u stop=%d"
" swq_id=%#.2x (ac %d/hwq %d)\n",
cnt, q->read_ptr, q->write_ptr,
!!test_bit(cnt, priv->queue_stopped),
txq->swq_id,
txq->swq_id & 0x80 ? txq->swq_id & 3 :
txq->swq_id,
txq->swq_id & 0x80 ? (txq->swq_id >> 2) &
0x1f : txq->swq_id);
if (cnt >= 4)
continue;
/* for the ACs, display the stop count too */
pos += scnprintf(buf + pos, bufsz - pos,
" stop-count: %d\n",
atomic_read(&priv->queue_stop_count[cnt]));
}
ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
kfree(buf);
return ret;
}
static ssize_t iwl_dbgfs_rx_queue_read(struct file *file,
char __user *user_buf,
size_t count, loff_t *ppos) {
struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
struct iwl_rx_queue *rxq = &priv->rxq;
char buf[256];
int pos = 0;
const size_t bufsz = sizeof(buf);
pos += scnprintf(buf + pos, bufsz - pos, "read: %u\n",
rxq->read);
pos += scnprintf(buf + pos, bufsz - pos, "write: %u\n",
rxq->write);
pos += scnprintf(buf + pos, bufsz - pos, "free_count: %u\n",
rxq->free_count);
pos += scnprintf(buf + pos, bufsz - pos, "closed_rb_num: %u\n",
le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF);
return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
}
DEBUGFS_READ_WRITE_FILE_OPS(rx_statistics);
DEBUGFS_READ_WRITE_FILE_OPS(tx_statistics);
DEBUGFS_READ_WRITE_FILE_OPS(traffic_log);
DEBUGFS_READ_FILE_OPS(rx_queue);
DEBUGFS_READ_FILE_OPS(tx_queue);
/*
* Create the debugfs files and directories
......@@ -934,6 +999,8 @@ int iwl_dbgfs_register(struct iwl_priv *priv, const char *name)
DEBUGFS_ADD_FILE(rx_statistics, debug);
DEBUGFS_ADD_FILE(tx_statistics, debug);
DEBUGFS_ADD_FILE(traffic_log, debug);
DEBUGFS_ADD_FILE(rx_queue, debug);
DEBUGFS_ADD_FILE(tx_queue, debug);
DEBUGFS_ADD_BOOL(disable_sensitivity, rf, &priv->disable_sens_cal);
DEBUGFS_ADD_BOOL(disable_chain_noise, rf,
&priv->disable_chain_noise_cal);
......@@ -976,6 +1043,8 @@ void iwl_dbgfs_unregister(struct iwl_priv *priv)
DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_rx_statistics);
DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_tx_statistics);
DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_traffic_log);
DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_rx_queue);
DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_tx_queue);
DEBUGFS_REMOVE(priv->dbgfs->dir_debug);
DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_sensitivity);
DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_chain_noise);
......
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