iwlwifi: Add debugfs to iwl core

This patch adds debugfs support to iwl core
currently only iwl4965 is supported

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 319 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-debugfs.c b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
new file mode 100644
index 000000000000..c659bd3bc346
--- /dev/null
+++ b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
@@ -0,0 +1,319 @@
+/******************************************************************************
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2008 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License 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 Street, Fifth Floor, Boston, MA 02110,
+ * USA
+ *
+ * The full GNU General Public License is included in this distribution
+ * in the file called LICENSE.GPL.
+ *
+ * Contact Information:
+ * Tomas Winkler <tomas.winkler@intel.com>
+ * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+ *****************************************************************************/
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/debugfs.h>
+
+#include <linux/ieee80211.h>
+#include <net/mac80211.h>
+
+
+#include "iwl-4965.h"
+#include "iwl-debug.h"
+#include "iwl-4965-io.h"
+
+
+/* create and remove of files */
+#define DEBUGFS_ADD_DIR(name, parent) do {                              \
+	dbgfs->dir_##name = debugfs_create_dir(#name, parent);          \
+	if (!(dbgfs->dir_##name))                                       \
+		goto err; 						\
+} while (0)
+
+#define DEBUGFS_ADD_FILE(name, parent) do {                             \
+	dbgfs->dbgfs_##parent##_files.file_##name =                     \
+	debugfs_create_file(#name, 0644, dbgfs->dir_##parent, priv,     \
+				&iwl_dbgfs_##name##_ops);               \
+	if (!(dbgfs->dbgfs_##parent##_files.file_##name))               \
+		goto err;                                               \
+} while (0)
+
+#define DEBUGFS_REMOVE(name)  do {              \
+	debugfs_remove(name);                   \
+	name = NULL;                            \
+} while (0);
+
+/* file operation */
+#define DEBUGFS_READ_FUNC(name)                                         \
+static ssize_t iwl_dbgfs_##name##_read(struct file *file,               \
+					char __user *user_buf,          \
+					size_t count, loff_t *ppos);
+
+#define DEBUGFS_WRITE_FUNC(name)                                        \
+static ssize_t iwl_dbgfs_##name##_write(struct file *file,              \
+					const char __user *user_buf,    \
+					size_t count, loff_t *ppos);
+
+
+static int iwl_dbgfs_open_file_generic(struct inode *inode, struct file *file)
+{
+	file->private_data = inode->i_private;
+	return 0;
+}
+
+#define DEBUGFS_READ_FILE_OPS(name)                                     \
+	DEBUGFS_READ_FUNC(name);                                        \
+static const struct file_operations iwl_dbgfs_##name##_ops = {          \
+	.read = iwl_dbgfs_##name##_read,                       		\
+	.open = iwl_dbgfs_open_file_generic,                    	\
+};
+
+#define DEBUGFS_READ_WRITE_FILE_OPS(name)                               \
+	DEBUGFS_READ_FUNC(name);                                        \
+	DEBUGFS_WRITE_FUNC(name);                                       \
+static const struct file_operations iwl_dbgfs_##name##_ops = {          \
+	.write = iwl_dbgfs_##name##_write,                              \
+	.read = iwl_dbgfs_##name##_read,                                \
+	.open = iwl_dbgfs_open_file_generic,                            \
+};
+
+
+static ssize_t iwl_dbgfs_tx_statistics_read(struct file *file,
+						char __user *user_buf,
+						size_t count, loff_t *ppos) {
+
+	struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
+	char buf[256];
+	int pos = 0;
+
+	pos += sprintf(buf+pos, "mgmt: %u\n", priv->tx_stats[0].cnt);
+	pos += sprintf(buf+pos, "ctrl: %u\n", priv->tx_stats[1].cnt);
+	pos += sprintf(buf+pos, "data: %u\n", priv->tx_stats[2].cnt);
+
+	return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
+}
+
+static ssize_t iwl_dbgfs_rx_statistics_read(struct file *file,
+						char __user *user_buf,
+						size_t count, loff_t *ppos) {
+
+	struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
+	char buf[256];
+	int pos = 0;
+
+	pos += sprintf(buf+pos, "mgmt: %u\n", priv->rx_stats[0].cnt);
+	pos += sprintf(buf+pos, "ctrl: %u\n", priv->rx_stats[1].cnt);
+	pos += sprintf(buf+pos, "data: %u\n", priv->rx_stats[2].cnt);
+
+	return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
+}
+
+#define BYTE1_MASK 0x000000ff;
+#define BYTE2_MASK 0x0000ffff;
+#define BYTE3_MASK 0x00ffffff;
+static ssize_t iwl_dbgfs_sram_read(struct file *file,
+					char __user *user_buf,
+					size_t count, loff_t *ppos)
+{
+	u32 val;
+	char buf[1024];
+	ssize_t ret;
+	int i;
+	int pos = 0;
+	struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
+
+	printk(KERN_DEBUG "offset is: 0x%x\tlen is: 0x%x\n",
+	priv->dbgfs->sram_offset, priv->dbgfs->sram_len);
+
+	iwl4965_grab_nic_access(priv);
+	for (i = priv->dbgfs->sram_len; i > 0; i -= 4) {
+		val = iwl4965_read_targ_mem(priv, priv->dbgfs->sram_offset + \
+					priv->dbgfs->sram_len - i);
+		if (i < 4) {
+			switch (i) {
+			case 1:
+				val &= BYTE1_MASK;
+				break;
+			case 2:
+				val &= BYTE2_MASK;
+				break;
+			case 3:
+				val &= BYTE3_MASK;
+				break;
+			}
+		}
+		pos += sprintf(buf+pos, "0x%08x ", val);
+	}
+	pos += sprintf(buf+pos, "\n");
+	iwl4965_release_nic_access(priv);
+
+	ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
+	return ret;
+}
+
+static ssize_t iwl_dbgfs_sram_write(struct file *file,
+					const char __user *user_buf,
+					size_t count, loff_t *ppos)
+{
+	struct iwl_priv *priv = file->private_data;
+	char buf[64];
+	int buf_size;
+	u32 offset, len;
+
+	memset(buf, 0, sizeof(buf));
+	buf_size = min(count, sizeof(buf) -  1);
+	if (copy_from_user(buf, user_buf, buf_size))
+		return -EFAULT;
+
+	if (sscanf(buf, "%x,%x", &offset, &len) == 2) {
+		priv->dbgfs->sram_offset = offset;
+		priv->dbgfs->sram_len = len;
+	} else {
+		priv->dbgfs->sram_offset = 0;
+		priv->dbgfs->sram_len = 0;
+	}
+
+	return count;
+}
+
+static ssize_t iwl_dbgfs_stations_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 iwl4965_station_entry *station;
+	int max_sta = priv->hw_setting.max_stations;
+	char *buf;
+	int i, j, pos = 0;
+	ssize_t ret;
+	/* Add 30 for initial string */
+	const size_t bufsz = 30 + sizeof(char) * 500 * (priv->num_stations);
+	DECLARE_MAC_BUF(mac);
+
+	buf = kmalloc(bufsz, GFP_KERNEL);
+	if(!buf)
+		return -ENOMEM;
+
+	pos += sprintf(buf+pos, "num of stations: %d\n\n",
+			priv->num_stations);
+
+	for (i = 0; i < max_sta; i++) {
+		station = &priv->stations[i];
+		if (station->used) {
+			pos += sprintf(buf+pos, "station %d:\ngeneral data:\n",
+					i+1);
+			print_mac(mac, station->sta.sta.addr);
+			pos += sprintf(buf+pos, "id: %u\n",
+					station->sta.sta.sta_id);
+			pos += sprintf(buf+pos, "mode: %u\n",
+					station->sta.mode);
+			pos += sprintf(buf+pos, "flags: 0x%x\n",
+					station->sta.station_flags_msk);
+			pos += sprintf(buf+pos, "ps_status: %u\n",
+					station->ps_status);
+
+			pos += sprintf(buf+pos, "tid data:\n");
+
+			pos += sprintf(buf+pos, "seq_num\t\ttxq_id\t");
+			pos += sprintf(buf+pos, "frame_count\twait_for_ba\t");
+			pos += sprintf(buf+pos, "start_idx\tbitmap0\t");
+			pos += sprintf(buf+pos, "bitmap1\trate_n_flags\n");
+
+			for (j = 0; j < MAX_TID_COUNT; j++) {
+				pos += sprintf(buf+pos, "[%d]:\t\t%u\t",
+						j, station->tid[j].seq_number);
+				pos += sprintf(buf+pos, "%u\t\t%u\t\t%u\t\t",
+						station->tid[j].agg.txq_id,
+						station->tid[j].agg.frame_count,
+						station->tid[j].agg.wait_for_ba);
+				pos += sprintf(buf+pos, "%u\t%llu\t%u\n",
+						station->tid[j].agg.start_idx,
+						station->tid[j].agg.bitmap,
+						station->tid[j].agg.rate_n_flags);
+			}
+			pos += sprintf(buf+pos, "\n");
+		}
+	}
+
+	ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
+	kfree(buf);
+	return ret;
+}
+
+
+DEBUGFS_READ_WRITE_FILE_OPS(sram);
+DEBUGFS_READ_FILE_OPS(stations);
+DEBUGFS_READ_FILE_OPS(rx_statistics);
+DEBUGFS_READ_FILE_OPS(tx_statistics);
+
+/*
+ * Create the debugfs files and directories
+ *
+ */
+int iwl_dbgfs_register(struct iwl_priv *priv, const char *name)
+{
+	struct iwl_debugfs *dbgfs;
+
+	dbgfs = kzalloc(sizeof(struct iwl_debugfs), GFP_KERNEL);
+	if (!dbgfs) {
+		goto err;
+	}
+
+	priv->dbgfs = dbgfs;
+	dbgfs->name = name;
+	dbgfs->dir_drv = debugfs_create_dir(name, NULL);
+	if (!dbgfs->dir_drv || IS_ERR(dbgfs->dir_drv)){
+		goto err;
+	}
+
+	DEBUGFS_ADD_DIR(data, dbgfs->dir_drv);
+	DEBUGFS_ADD_FILE(sram, data);
+	DEBUGFS_ADD_FILE(stations, data);
+	DEBUGFS_ADD_FILE(rx_statistics, data);
+	DEBUGFS_ADD_FILE(tx_statistics, data);
+
+	return 0;
+
+err:
+	IWL_ERROR("Can't open the debugfs directory\n");
+	iwl_dbgfs_unregister(priv);
+	return -ENOENT;
+}
+EXPORT_SYMBOL(iwl_dbgfs_register);
+
+/**
+ * Remove the debugfs files and directories
+ *
+ */
+void iwl_dbgfs_unregister(struct iwl_priv *priv)
+{
+	if (!(priv->dbgfs))
+		return;
+
+	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_rx_statistics);
+	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_tx_statistics);
+	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_sram);
+	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_stations);
+	DEBUGFS_REMOVE(priv->dbgfs->dir_data);
+	DEBUGFS_REMOVE(priv->dbgfs->dir_drv);
+	kfree(priv->dbgfs);
+	priv->dbgfs = NULL;
+}
+EXPORT_SYMBOL(iwl_dbgfs_unregister);
+
+