drivers/net/wireless/iwmc3200wifi/debugfs.c - kernel/mindspeed - Git at Google

 /*
  * Intel Wireless Multicomm 3200 WiFi driver
  *
  * Copyright (C) 2009 Intel Corporation <ilw@linux.intel.com>
  * Samuel Ortiz <samuel.ortiz@intel.com>
  * Zhu Yi <yi.zhu@intel.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 Street, Fifth Floor, Boston, MA
  * 02110-1301, USA.
  *
  */

 #include <linux/slab.h>
 #include <linux/kernel.h>
 #include <linux/bitops.h>
 #include <linux/debugfs.h>
 #include <linux/export.h>

 #include "iwm.h"
 #include "bus.h"
 #include "rx.h"
 #include "debug.h"

 static struct {
 	u8 id;
 	char *name;
 } iwm_debug_module[__IWM_DM_NR] = {
 	 {IWM_DM_BOOT, "boot"},
 	 {IWM_DM_FW,   "fw"},
 	 {IWM_DM_SDIO, "sdio"},
 	 {IWM_DM_NTF,  "ntf"},
 	 {IWM_DM_RX,   "rx"},
 	 {IWM_DM_TX,   "tx"},
 	 {IWM_DM_MLME, "mlme"},
 	 {IWM_DM_CMD,  "cmd"},
 	 {IWM_DM_WEXT,  "wext"},
 };

 #define add_dbg_module(dbg, name, id, initlevel) 	\
 do {							\
 	dbg.dbg_module[id] = (initlevel);		\
 	dbg.dbg_module_dentries[id] =			\
 		debugfs_create_x8(name, 0600,		\
 				dbg.dbgdir,		\
 				&(dbg.dbg_module[id]));	\
 } while (0)

 static int iwm_debugfs_u32_read(void *data, u64 *val)
 {
 	struct iwm_priv *iwm = data;

 	*val = iwm->dbg.dbg_level;
 	return 0;
 }

 static int iwm_debugfs_dbg_level_write(void *data, u64 val)
 {
 	struct iwm_priv *iwm = data;
 	int i;

 	iwm->dbg.dbg_level = val;

 	for (i = 0; i < __IWM_DM_NR; i++)
 		iwm->dbg.dbg_module[i] = val;

 	return 0;
 }
 DEFINE_SIMPLE_ATTRIBUTE(fops_iwm_dbg_level,
 			iwm_debugfs_u32_read, iwm_debugfs_dbg_level_write,
 			"%llu\n");

 static int iwm_debugfs_dbg_modules_write(void *data, u64 val)
 {
 	struct iwm_priv *iwm = data;
 	int i, bit;

 	iwm->dbg.dbg_modules = val;

 	for (i = 0; i < __IWM_DM_NR; i++)
 		iwm->dbg.dbg_module[i] = 0;

 	for_each_set_bit(bit, &iwm->dbg.dbg_modules, __IWM_DM_NR)
 		iwm->dbg.dbg_module[bit] = iwm->dbg.dbg_level;

 	return 0;
 }
 DEFINE_SIMPLE_ATTRIBUTE(fops_iwm_dbg_modules,
 			iwm_debugfs_u32_read, iwm_debugfs_dbg_modules_write,
 			"%llu\n");

 static int iwm_generic_open(struct inode *inode, struct file *filp)
 {
 	filp->private_data = inode->i_private;
 	return 0;
 }


 static ssize_t iwm_debugfs_txq_read(struct file *filp, char __user *buffer,
 				   size_t count, loff_t *ppos)
 {
 	struct iwm_priv *iwm = filp->private_data;
 	char *buf;
 	int i, buf_len = 4096;
 	size_t len = 0;
 	ssize_t ret;

 	if (*ppos != 0)
 		return 0;
 	if (count < sizeof(buf))
 		return -ENOSPC;

 	buf = kzalloc(buf_len, GFP_KERNEL);
 	if (!buf)
 		return -ENOMEM;

 	for (i = 0; i < IWM_TX_QUEUES; i++) {
 		struct iwm_tx_queue *txq = &iwm->txq[i];
 		struct sk_buff *skb;
 		int j;
 		unsigned long flags;

 		spin_lock_irqsave(&txq->queue.lock, flags);

 		skb = (struct sk_buff *)&txq->queue;

 		len += snprintf(buf + len, buf_len - len, "TXQ #%d\n", i);
 		len += snprintf(buf + len, buf_len - len, "\tStopped:     %d\n",
 				__netif_subqueue_stopped(iwm_to_ndev(iwm),
 							 txq->id));
 		len += snprintf(buf + len, buf_len - len, "\tConcat count:%d\n",
 				txq->concat_count);
 		len += snprintf(buf + len, buf_len - len, "\tQueue len:   %d\n",
 				skb_queue_len(&txq->queue));
 		for (j = 0; j < skb_queue_len(&txq->queue); j++) {
 			struct iwm_tx_info *tx_info;

 			skb = skb->next;
 			tx_info = skb_to_tx_info(skb);

 			len += snprintf(buf + len, buf_len - len,
 					"\tSKB #%d\n", j);
 			len += snprintf(buf + len, buf_len - len,
 					"\t\tsta:   %d\n", tx_info->sta);
 			len += snprintf(buf + len, buf_len - len,
 					"\t\tcolor: %d\n", tx_info->color);
 			len += snprintf(buf + len, buf_len - len,
 					"\t\ttid:   %d\n", tx_info->tid);
 		}

 		spin_unlock_irqrestore(&txq->queue.lock, flags);

 		spin_lock_irqsave(&txq->stopped_queue.lock, flags);

 		len += snprintf(buf + len, buf_len - len,
 				"\tStopped Queue len:   %d\n",
 				skb_queue_len(&txq->stopped_queue));
 		for (j = 0; j < skb_queue_len(&txq->stopped_queue); j++) {
 			struct iwm_tx_info *tx_info;

 			skb = skb->next;
 			tx_info = skb_to_tx_info(skb);

 			len += snprintf(buf + len, buf_len - len,
 					"\tSKB #%d\n", j);
 			len += snprintf(buf + len, buf_len - len,
 					"\t\tsta:   %d\n", tx_info->sta);
 			len += snprintf(buf + len, buf_len - len,
 					"\t\tcolor: %d\n", tx_info->color);
 			len += snprintf(buf + len, buf_len - len,
 					"\t\ttid:   %d\n", tx_info->tid);
 		}

 		spin_unlock_irqrestore(&txq->stopped_queue.lock, flags);
 	}

 	ret = simple_read_from_buffer(buffer, len, ppos, buf, buf_len);
 	kfree(buf);

 	return ret;
 }

 static ssize_t iwm_debugfs_tx_credit_read(struct file *filp,
 					  char __user *buffer,
 					  size_t count, loff_t *ppos)
 {
 	struct iwm_priv *iwm = filp->private_data;
 	struct iwm_tx_credit *credit = &iwm->tx_credit;
 	char *buf;
 	int i, buf_len = 4096;
 	size_t len = 0;
 	ssize_t ret;

 	if (*ppos != 0)
 		return 0;
 	if (count < sizeof(buf))
 		return -ENOSPC;

 	buf = kzalloc(buf_len, GFP_KERNEL);
 	if (!buf)
 		return -ENOMEM;

 	len += snprintf(buf + len, buf_len - len,
 			"NR pools:  %d\n", credit->pool_nr);
 	len += snprintf(buf + len, buf_len - len,
 			"pools map: 0x%lx\n", credit->full_pools_map);

 	len += snprintf(buf + len, buf_len - len, "\n### POOLS ###\n");
 	for (i = 0; i < IWM_MACS_OUT_GROUPS; i++) {
 		len += snprintf(buf + len, buf_len - len,
 				"pools entry #%d\n", i);
 		len += snprintf(buf + len, buf_len - len,
 				"\tid:          %d\n",
 				credit->pools[i].id);
 		len += snprintf(buf + len, buf_len - len,
 				"\tsid:         %d\n",
 				credit->pools[i].sid);
 		len += snprintf(buf + len, buf_len - len,
 				"\tmin_pages:   %d\n",
 				credit->pools[i].min_pages);
 		len += snprintf(buf + len, buf_len - len,
 				"\tmax_pages:   %d\n",
 				credit->pools[i].max_pages);
 		len += snprintf(buf + len, buf_len - len,
 				"\talloc_pages: %d\n",
 				credit->pools[i].alloc_pages);
 		len += snprintf(buf + len, buf_len - len,
 				"\tfreed_pages: %d\n",
 				credit->pools[i].total_freed_pages);
 	}

 	len += snprintf(buf + len, buf_len - len, "\n### SPOOLS ###\n");
 	for (i = 0; i < IWM_MACS_OUT_SGROUPS; i++) {
 		len += snprintf(buf + len, buf_len - len,
 				"spools entry #%d\n", i);
 		len += snprintf(buf + len, buf_len - len,
 				"\tid:          %d\n",
 				credit->spools[i].id);
 		len += snprintf(buf + len, buf_len - len,
 				"\tmax_pages:   %d\n",
 				credit->spools[i].max_pages);
 		len += snprintf(buf + len, buf_len - len,
 				"\talloc_pages: %d\n",
 				credit->spools[i].alloc_pages);

 	}

 	ret = simple_read_from_buffer(buffer, len, ppos, buf, buf_len);
 	kfree(buf);

 	return ret;
 }

 static ssize_t iwm_debugfs_rx_ticket_read(struct file *filp,
 					  char __user *buffer,
 					  size_t count, loff_t *ppos)
 {
 	struct iwm_priv *iwm = filp->private_data;
 	struct iwm_rx_ticket_node *ticket;
 	char *buf;
 	int buf_len = 4096, i;
 	size_t len = 0;
 	ssize_t ret;

 	if (*ppos != 0)
 		return 0;
 	if (count < sizeof(buf))
 		return -ENOSPC;

 	buf = kzalloc(buf_len, GFP_KERNEL);
 	if (!buf)
 		return -ENOMEM;

 	spin_lock(&iwm->ticket_lock);
 	list_for_each_entry(ticket, &iwm->rx_tickets, node) {
 		len += snprintf(buf + len, buf_len - len, "Ticket #%d\n",
 				ticket->ticket->id);
 		len += snprintf(buf + len, buf_len - len, "\taction: 0x%x\n",
 				ticket->ticket->action);
 		len += snprintf(buf + len, buf_len - len, "\tflags:  0x%x\n",
 				ticket->ticket->flags);
 	}
 	spin_unlock(&iwm->ticket_lock);

 	for (i = 0; i < IWM_RX_ID_HASH; i++) {
 		struct iwm_rx_packet *packet;
 		struct list_head *pkt_list = &iwm->rx_packets[i];

 		if (!list_empty(pkt_list)) {
 			len += snprintf(buf + len, buf_len - len,
 					"Packet hash #%d\n", i);
 			spin_lock(&iwm->packet_lock[i]);
 			list_for_each_entry(packet, pkt_list, node) {
 				len += snprintf(buf + len, buf_len - len,
 						"\tPacket id:     %d\n",
 						packet->id);
 				len += snprintf(buf + len, buf_len - len,
 						"\tPacket length: %lu\n",
 						packet->pkt_size);
 			}
 			spin_unlock(&iwm->packet_lock[i]);
 		}
 	}

 	ret = simple_read_from_buffer(buffer, len, ppos, buf, buf_len);
 	kfree(buf);

 	return ret;
 }

 static ssize_t iwm_debugfs_fw_err_read(struct file *filp,
 				       char __user *buffer,
 				       size_t count, loff_t *ppos)
 {

 	struct iwm_priv *iwm = filp->private_data;
 	char buf[512];
 	int buf_len = 512;
 	size_t len = 0;

 	if (*ppos != 0)
 		return 0;
 	if (count < sizeof(buf))
 		return -ENOSPC;

 	if (!iwm->last_fw_err)
 		return -ENOMEM;

 	if (iwm->last_fw_err->line_num == 0)
 		goto out;

 	len += snprintf(buf + len, buf_len - len, "%cMAC FW ERROR:\n",
 	     (le32_to_cpu(iwm->last_fw_err->category) == UMAC_SYS_ERR_CAT_LMAC)
 			? 'L' : 'U');
 	len += snprintf(buf + len, buf_len - len,
 			"\tCategory:    %d\n",
 			le32_to_cpu(iwm->last_fw_err->category));

 	len += snprintf(buf + len, buf_len - len,
 			"\tStatus:      0x%x\n",
 			le32_to_cpu(iwm->last_fw_err->status));

 	len += snprintf(buf + len, buf_len - len,
 			"\tPC:          0x%x\n",
 			le32_to_cpu(iwm->last_fw_err->pc));

 	len += snprintf(buf + len, buf_len - len,
 			"\tblink1:      %d\n",
 			le32_to_cpu(iwm->last_fw_err->blink1));

 	len += snprintf(buf + len, buf_len - len,
 			"\tblink2:      %d\n",
 			le32_to_cpu(iwm->last_fw_err->blink2));

 	len += snprintf(buf + len, buf_len - len,
 			"\tilink1:      %d\n",
 			le32_to_cpu(iwm->last_fw_err->ilink1));

 	len += snprintf(buf + len, buf_len - len,
 			"\tilink2:      %d\n",
 			le32_to_cpu(iwm->last_fw_err->ilink2));

 	len += snprintf(buf + len, buf_len - len,
 			"\tData1:       0x%x\n",
 			le32_to_cpu(iwm->last_fw_err->data1));

 	len += snprintf(buf + len, buf_len - len,
 			"\tData2:       0x%x\n",
 			le32_to_cpu(iwm->last_fw_err->data2));

 	len += snprintf(buf + len, buf_len - len,
 			"\tLine number: %d\n",
 			le32_to_cpu(iwm->last_fw_err->line_num));

 	len += snprintf(buf + len, buf_len - len,
 			"\tUMAC status: 0x%x\n",
 			le32_to_cpu(iwm->last_fw_err->umac_status));

 	len += snprintf(buf + len, buf_len - len,
 			"\tLMAC status: 0x%x\n",
 			le32_to_cpu(iwm->last_fw_err->lmac_status));

 	len += snprintf(buf + len, buf_len - len,
 			"\tSDIO status: 0x%x\n",
 			le32_to_cpu(iwm->last_fw_err->sdio_status));

 out:

 	return simple_read_from_buffer(buffer, len, ppos, buf, buf_len);
 }

 static const struct file_operations iwm_debugfs_txq_fops = {
 	.owner =	THIS_MODULE,
 	.open =		iwm_generic_open,
 	.read =		iwm_debugfs_txq_read,
 	.llseek =	default_llseek,
 };

 static const struct file_operations iwm_debugfs_tx_credit_fops = {
 	.owner =	THIS_MODULE,
 	.open =		iwm_generic_open,
 	.read =		iwm_debugfs_tx_credit_read,
 	.llseek =	default_llseek,
 };

 static const struct file_operations iwm_debugfs_rx_ticket_fops = {
 	.owner =	THIS_MODULE,
 	.open =		iwm_generic_open,
 	.read =		iwm_debugfs_rx_ticket_read,
 	.llseek =	default_llseek,
 };

 static const struct file_operations iwm_debugfs_fw_err_fops = {
 	.owner =	THIS_MODULE,
 	.open =		iwm_generic_open,
 	.read =		iwm_debugfs_fw_err_read,
 	.llseek =	default_llseek,
 };

 void iwm_debugfs_init(struct iwm_priv *iwm)
 {
 	int i;

 	iwm->dbg.rootdir = debugfs_create_dir(KBUILD_MODNAME, NULL);
 	iwm->dbg.devdir = debugfs_create_dir(wiphy_name(iwm_to_wiphy(iwm)),
 					     iwm->dbg.rootdir);
 	iwm->dbg.dbgdir = debugfs_create_dir("debug", iwm->dbg.devdir);
 	iwm->dbg.rxdir = debugfs_create_dir("rx", iwm->dbg.devdir);
 	iwm->dbg.txdir = debugfs_create_dir("tx", iwm->dbg.devdir);
 	iwm->dbg.busdir = debugfs_create_dir("bus", iwm->dbg.devdir);
 	if (iwm->bus_ops->debugfs_init)
 		iwm->bus_ops->debugfs_init(iwm, iwm->dbg.busdir);

 	iwm->dbg.dbg_level = IWM_DL_NONE;
 	iwm->dbg.dbg_level_dentry =
 		debugfs_create_file("level", 0200, iwm->dbg.dbgdir, iwm,
 				    &fops_iwm_dbg_level);

 	iwm->dbg.dbg_modules = IWM_DM_DEFAULT;
 	iwm->dbg.dbg_modules_dentry =
 		debugfs_create_file("modules", 0200, iwm->dbg.dbgdir, iwm,
 				    &fops_iwm_dbg_modules);

 	for (i = 0; i < __IWM_DM_NR; i++)
 		add_dbg_module(iwm->dbg, iwm_debug_module[i].name,
 			       iwm_debug_module[i].id, IWM_DL_DEFAULT);

 	iwm->dbg.txq_dentry = debugfs_create_file("queues", 0200,
 						  iwm->dbg.txdir, iwm,
 						  &iwm_debugfs_txq_fops);
 	iwm->dbg.tx_credit_dentry = debugfs_create_file("credits", 0200,
 						   iwm->dbg.txdir, iwm,
 						   &iwm_debugfs_tx_credit_fops);
 	iwm->dbg.rx_ticket_dentry = debugfs_create_file("tickets", 0200,
 						  iwm->dbg.rxdir, iwm,
 						  &iwm_debugfs_rx_ticket_fops);
 	iwm->dbg.fw_err_dentry = debugfs_create_file("last_fw_err", 0200,
 						     iwm->dbg.dbgdir, iwm,
 						     &iwm_debugfs_fw_err_fops);
 }

 void iwm_debugfs_exit(struct iwm_priv *iwm)
 {
 	int i;

 	for (i = 0; i < __IWM_DM_NR; i++)
 		debugfs_remove(iwm->dbg.dbg_module_dentries[i]);

 	debugfs_remove(iwm->dbg.dbg_modules_dentry);
 	debugfs_remove(iwm->dbg.dbg_level_dentry);
 	debugfs_remove(iwm->dbg.txq_dentry);
 	debugfs_remove(iwm->dbg.tx_credit_dentry);
 	debugfs_remove(iwm->dbg.rx_ticket_dentry);
 	debugfs_remove(iwm->dbg.fw_err_dentry);
 	if (iwm->bus_ops->debugfs_exit)
 		iwm->bus_ops->debugfs_exit(iwm);

 	debugfs_remove(iwm->dbg.busdir);
 	debugfs_remove(iwm->dbg.dbgdir);
 	debugfs_remove(iwm->dbg.txdir);
 	debugfs_remove(iwm->dbg.rxdir);
 	debugfs_remove(iwm->dbg.devdir);
 	debugfs_remove(iwm->dbg.rootdir);
 }
	/*
	* Intel Wireless Multicomm 3200 WiFi driver
	*
	* Copyright (C) 2009 Intel Corporation <ilw@linux.intel.com>
	* Samuel Ortiz <samuel.ortiz@intel.com>
	* Zhu Yi <yi.zhu@intel.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 Street, Fifth Floor, Boston, MA
	* 02110-1301, USA.
	*
	*/

	#include <linux/slab.h>
	#include <linux/kernel.h>
	#include <linux/bitops.h>
	#include <linux/debugfs.h>
	#include <linux/export.h>

	#include "iwm.h"
	#include "bus.h"
	#include "rx.h"
	#include "debug.h"

	static struct {
	u8 id;
	char *name;
	} iwm_debug_module[__IWM_DM_NR] = {
	{IWM_DM_BOOT, "boot"},
	{IWM_DM_FW, "fw"},
	{IWM_DM_SDIO, "sdio"},
	{IWM_DM_NTF, "ntf"},
	{IWM_DM_RX, "rx"},
	{IWM_DM_TX, "tx"},
	{IWM_DM_MLME, "mlme"},
	{IWM_DM_CMD, "cmd"},
	{IWM_DM_WEXT, "wext"},
	};

	#define add_dbg_module(dbg, name, id, initlevel) \
	do { \
	dbg.dbg_module[id] = (initlevel); \
	dbg.dbg_module_dentries[id] = \
	debugfs_create_x8(name, 0600, \
	dbg.dbgdir, \
	&(dbg.dbg_module[id])); \
	} while (0)

	static int iwm_debugfs_u32_read(void data, u64 val)
	{
	struct iwm_priv *iwm = data;

	*val = iwm->dbg.dbg_level;
	return 0;
	}

	static int iwm_debugfs_dbg_level_write(void *data, u64 val)
	{
	struct iwm_priv *iwm = data;
	int i;

	iwm->dbg.dbg_level = val;

	for (i = 0; i < __IWM_DM_NR; i++)
	iwm->dbg.dbg_module[i] = val;

	return 0;
	}
	DEFINE_SIMPLE_ATTRIBUTE(fops_iwm_dbg_level,
	iwm_debugfs_u32_read, iwm_debugfs_dbg_level_write,
	"%llu\n");

	static int iwm_debugfs_dbg_modules_write(void *data, u64 val)
	{
	struct iwm_priv *iwm = data;
	int i, bit;

	iwm->dbg.dbg_modules = val;

	for (i = 0; i < __IWM_DM_NR; i++)
	iwm->dbg.dbg_module[i] = 0;

	for_each_set_bit(bit, &iwm->dbg.dbg_modules, __IWM_DM_NR)
	iwm->dbg.dbg_module[bit] = iwm->dbg.dbg_level;

	return 0;
	}
	DEFINE_SIMPLE_ATTRIBUTE(fops_iwm_dbg_modules,
	iwm_debugfs_u32_read, iwm_debugfs_dbg_modules_write,
	"%llu\n");

	static int iwm_generic_open(struct inode inode, struct file filp)
	{
	filp->private_data = inode->i_private;
	return 0;
	}


	static ssize_t iwm_debugfs_txq_read(struct file filp, char __user buffer,
	size_t count, loff_t *ppos)
	{
	struct iwm_priv *iwm = filp->private_data;
	char *buf;
	int i, buf_len = 4096;
	size_t len = 0;
	ssize_t ret;

	if (*ppos != 0)
	return 0;
	if (count < sizeof(buf))
	return -ENOSPC;

	buf = kzalloc(buf_len, GFP_KERNEL);
	if (!buf)
	return -ENOMEM;

	for (i = 0; i < IWM_TX_QUEUES; i++) {
	struct iwm_tx_queue *txq = &iwm->txq[i];
	struct sk_buff *skb;
	int j;
	unsigned long flags;

	spin_lock_irqsave(&txq->queue.lock, flags);

	skb = (struct sk_buff *)&txq->queue;

	len += snprintf(buf + len, buf_len - len, "TXQ #%d\n", i);
	len += snprintf(buf + len, buf_len - len, "\tStopped: %d\n",
	__netif_subqueue_stopped(iwm_to_ndev(iwm),
	txq->id));
	len += snprintf(buf + len, buf_len - len, "\tConcat count:%d\n",
	txq->concat_count);
	len += snprintf(buf + len, buf_len - len, "\tQueue len: %d\n",
	skb_queue_len(&txq->queue));
	for (j = 0; j < skb_queue_len(&txq->queue); j++) {
	struct iwm_tx_info *tx_info;

	skb = skb->next;
	tx_info = skb_to_tx_info(skb);

	len += snprintf(buf + len, buf_len - len,
	"\tSKB #%d\n", j);
	len += snprintf(buf + len, buf_len - len,
	"\t\tsta: %d\n", tx_info->sta);
	len += snprintf(buf + len, buf_len - len,
	"\t\tcolor: %d\n", tx_info->color);
	len += snprintf(buf + len, buf_len - len,
	"\t\ttid: %d\n", tx_info->tid);
	}

	spin_unlock_irqrestore(&txq->queue.lock, flags);

	spin_lock_irqsave(&txq->stopped_queue.lock, flags);

	len += snprintf(buf + len, buf_len - len,
	"\tStopped Queue len: %d\n",
	skb_queue_len(&txq->stopped_queue));
	for (j = 0; j < skb_queue_len(&txq->stopped_queue); j++) {
	struct iwm_tx_info *tx_info;

	skb = skb->next;
	tx_info = skb_to_tx_info(skb);

	len += snprintf(buf + len, buf_len - len,
	"\tSKB #%d\n", j);
	len += snprintf(buf + len, buf_len - len,
	"\t\tsta: %d\n", tx_info->sta);
	len += snprintf(buf + len, buf_len - len,
	"\t\tcolor: %d\n", tx_info->color);
	len += snprintf(buf + len, buf_len - len,
	"\t\ttid: %d\n", tx_info->tid);
	}

	spin_unlock_irqrestore(&txq->stopped_queue.lock, flags);
	}

	ret = simple_read_from_buffer(buffer, len, ppos, buf, buf_len);
	kfree(buf);

	return ret;
	}

	static ssize_t iwm_debugfs_tx_credit_read(struct file *filp,
	char __user *buffer,
	size_t count, loff_t *ppos)
	{
	struct iwm_priv *iwm = filp->private_data;
	struct iwm_tx_credit *credit = &iwm->tx_credit;
	char *buf;
	int i, buf_len = 4096;
	size_t len = 0;
	ssize_t ret;

	if (*ppos != 0)
	return 0;
	if (count < sizeof(buf))
	return -ENOSPC;

	buf = kzalloc(buf_len, GFP_KERNEL);
	if (!buf)
	return -ENOMEM;

	len += snprintf(buf + len, buf_len - len,
	"NR pools: %d\n", credit->pool_nr);
	len += snprintf(buf + len, buf_len - len,
	"pools map: 0x%lx\n", credit->full_pools_map);

	len += snprintf(buf + len, buf_len - len, "\n### POOLS ###\n");
	for (i = 0; i < IWM_MACS_OUT_GROUPS; i++) {
	len += snprintf(buf + len, buf_len - len,
	"pools entry #%d\n", i);
	len += snprintf(buf + len, buf_len - len,
	"\tid: %d\n",
	credit->pools[i].id);
	len += snprintf(buf + len, buf_len - len,
	"\tsid: %d\n",
	credit->pools[i].sid);
	len += snprintf(buf + len, buf_len - len,
	"\tmin_pages: %d\n",
	credit->pools[i].min_pages);
	len += snprintf(buf + len, buf_len - len,
	"\tmax_pages: %d\n",
	credit->pools[i].max_pages);
	len += snprintf(buf + len, buf_len - len,
	"\talloc_pages: %d\n",
	credit->pools[i].alloc_pages);
	len += snprintf(buf + len, buf_len - len,
	"\tfreed_pages: %d\n",
	credit->pools[i].total_freed_pages);
	}

	len += snprintf(buf + len, buf_len - len, "\n### SPOOLS ###\n");
	for (i = 0; i < IWM_MACS_OUT_SGROUPS; i++) {
	len += snprintf(buf + len, buf_len - len,
	"spools entry #%d\n", i);
	len += snprintf(buf + len, buf_len - len,
	"\tid: %d\n",
	credit->spools[i].id);
	len += snprintf(buf + len, buf_len - len,
	"\tmax_pages: %d\n",
	credit->spools[i].max_pages);
	len += snprintf(buf + len, buf_len - len,
	"\talloc_pages: %d\n",
	credit->spools[i].alloc_pages);

	}

	ret = simple_read_from_buffer(buffer, len, ppos, buf, buf_len);
	kfree(buf);

	return ret;
	}

	static ssize_t iwm_debugfs_rx_ticket_read(struct file *filp,
	char __user *buffer,
	size_t count, loff_t *ppos)
	{
	struct iwm_priv *iwm = filp->private_data;
	struct iwm_rx_ticket_node *ticket;
	char *buf;
	int buf_len = 4096, i;
	size_t len = 0;
	ssize_t ret;

	if (*ppos != 0)
	return 0;
	if (count < sizeof(buf))
	return -ENOSPC;

	buf = kzalloc(buf_len, GFP_KERNEL);
	if (!buf)
	return -ENOMEM;

	spin_lock(&iwm->ticket_lock);
	list_for_each_entry(ticket, &iwm->rx_tickets, node) {
	len += snprintf(buf + len, buf_len - len, "Ticket #%d\n",
	ticket->ticket->id);
	len += snprintf(buf + len, buf_len - len, "\taction: 0x%x\n",
	ticket->ticket->action);
	len += snprintf(buf + len, buf_len - len, "\tflags: 0x%x\n",
	ticket->ticket->flags);
	}
	spin_unlock(&iwm->ticket_lock);

	for (i = 0; i < IWM_RX_ID_HASH; i++) {
	struct iwm_rx_packet *packet;
	struct list_head *pkt_list = &iwm->rx_packets[i];

	if (!list_empty(pkt_list)) {
	len += snprintf(buf + len, buf_len - len,
	"Packet hash #%d\n", i);
	spin_lock(&iwm->packet_lock[i]);
	list_for_each_entry(packet, pkt_list, node) {
	len += snprintf(buf + len, buf_len - len,
	"\tPacket id: %d\n",
	packet->id);
	len += snprintf(buf + len, buf_len - len,
	"\tPacket length: %lu\n",
	packet->pkt_size);
	}
	spin_unlock(&iwm->packet_lock[i]);
	}
	}

	ret = simple_read_from_buffer(buffer, len, ppos, buf, buf_len);
	kfree(buf);

	return ret;
	}

	static ssize_t iwm_debugfs_fw_err_read(struct file *filp,
	char __user *buffer,
	size_t count, loff_t *ppos)
	{

	struct iwm_priv *iwm = filp->private_data;
	char buf[512];
	int buf_len = 512;
	size_t len = 0;

	if (*ppos != 0)
	return 0;
	if (count < sizeof(buf))
	return -ENOSPC;

	if (!iwm->last_fw_err)
	return -ENOMEM;

	if (iwm->last_fw_err->line_num == 0)
	goto out;

	len += snprintf(buf + len, buf_len - len, "%cMAC FW ERROR:\n",
	(le32_to_cpu(iwm->last_fw_err->category) == UMAC_SYS_ERR_CAT_LMAC)
	? 'L' : 'U');
	len += snprintf(buf + len, buf_len - len,
	"\tCategory: %d\n",
	le32_to_cpu(iwm->last_fw_err->category));

	len += snprintf(buf + len, buf_len - len,
	"\tStatus: 0x%x\n",
	le32_to_cpu(iwm->last_fw_err->status));

	len += snprintf(buf + len, buf_len - len,
	"\tPC: 0x%x\n",
	le32_to_cpu(iwm->last_fw_err->pc));

	len += snprintf(buf + len, buf_len - len,
	"\tblink1: %d\n",
	le32_to_cpu(iwm->last_fw_err->blink1));

	len += snprintf(buf + len, buf_len - len,
	"\tblink2: %d\n",
	le32_to_cpu(iwm->last_fw_err->blink2));

	len += snprintf(buf + len, buf_len - len,
	"\tilink1: %d\n",
	le32_to_cpu(iwm->last_fw_err->ilink1));

	len += snprintf(buf + len, buf_len - len,
	"\tilink2: %d\n",
	le32_to_cpu(iwm->last_fw_err->ilink2));

	len += snprintf(buf + len, buf_len - len,
	"\tData1: 0x%x\n",
	le32_to_cpu(iwm->last_fw_err->data1));

	len += snprintf(buf + len, buf_len - len,
	"\tData2: 0x%x\n",
	le32_to_cpu(iwm->last_fw_err->data2));

	len += snprintf(buf + len, buf_len - len,
	"\tLine number: %d\n",
	le32_to_cpu(iwm->last_fw_err->line_num));

	len += snprintf(buf + len, buf_len - len,
	"\tUMAC status: 0x%x\n",
	le32_to_cpu(iwm->last_fw_err->umac_status));

	len += snprintf(buf + len, buf_len - len,
	"\tLMAC status: 0x%x\n",
	le32_to_cpu(iwm->last_fw_err->lmac_status));

	len += snprintf(buf + len, buf_len - len,
	"\tSDIO status: 0x%x\n",
	le32_to_cpu(iwm->last_fw_err->sdio_status));

	out:

	return simple_read_from_buffer(buffer, len, ppos, buf, buf_len);
	}

	static const struct file_operations iwm_debugfs_txq_fops = {
	.owner = THIS_MODULE,
	.open = iwm_generic_open,
	.read = iwm_debugfs_txq_read,
	.llseek = default_llseek,
	};

	static const struct file_operations iwm_debugfs_tx_credit_fops = {
	.owner = THIS_MODULE,
	.open = iwm_generic_open,
	.read = iwm_debugfs_tx_credit_read,
	.llseek = default_llseek,
	};

	static const struct file_operations iwm_debugfs_rx_ticket_fops = {
	.owner = THIS_MODULE,
	.open = iwm_generic_open,
	.read = iwm_debugfs_rx_ticket_read,
	.llseek = default_llseek,
	};

	static const struct file_operations iwm_debugfs_fw_err_fops = {
	.owner = THIS_MODULE,
	.open = iwm_generic_open,
	.read = iwm_debugfs_fw_err_read,
	.llseek = default_llseek,
	};

	void iwm_debugfs_init(struct iwm_priv *iwm)
	{
	int i;

	iwm->dbg.rootdir = debugfs_create_dir(KBUILD_MODNAME, NULL);
	iwm->dbg.devdir = debugfs_create_dir(wiphy_name(iwm_to_wiphy(iwm)),
	iwm->dbg.rootdir);
	iwm->dbg.dbgdir = debugfs_create_dir("debug", iwm->dbg.devdir);
	iwm->dbg.rxdir = debugfs_create_dir("rx", iwm->dbg.devdir);
	iwm->dbg.txdir = debugfs_create_dir("tx", iwm->dbg.devdir);
	iwm->dbg.busdir = debugfs_create_dir("bus", iwm->dbg.devdir);
	if (iwm->bus_ops->debugfs_init)
	iwm->bus_ops->debugfs_init(iwm, iwm->dbg.busdir);

	iwm->dbg.dbg_level = IWM_DL_NONE;
	iwm->dbg.dbg_level_dentry =
	debugfs_create_file("level", 0200, iwm->dbg.dbgdir, iwm,
	&fops_iwm_dbg_level);

	iwm->dbg.dbg_modules = IWM_DM_DEFAULT;
	iwm->dbg.dbg_modules_dentry =
	debugfs_create_file("modules", 0200, iwm->dbg.dbgdir, iwm,
	&fops_iwm_dbg_modules);

	for (i = 0; i < __IWM_DM_NR; i++)
	add_dbg_module(iwm->dbg, iwm_debug_module[i].name,
	iwm_debug_module[i].id, IWM_DL_DEFAULT);

	iwm->dbg.txq_dentry = debugfs_create_file("queues", 0200,
	iwm->dbg.txdir, iwm,
	&iwm_debugfs_txq_fops);
	iwm->dbg.tx_credit_dentry = debugfs_create_file("credits", 0200,
	iwm->dbg.txdir, iwm,
	&iwm_debugfs_tx_credit_fops);
	iwm->dbg.rx_ticket_dentry = debugfs_create_file("tickets", 0200,
	iwm->dbg.rxdir, iwm,
	&iwm_debugfs_rx_ticket_fops);
	iwm->dbg.fw_err_dentry = debugfs_create_file("last_fw_err", 0200,
	iwm->dbg.dbgdir, iwm,
	&iwm_debugfs_fw_err_fops);
	}

	void iwm_debugfs_exit(struct iwm_priv *iwm)
	{
	int i;

	for (i = 0; i < __IWM_DM_NR; i++)
	debugfs_remove(iwm->dbg.dbg_module_dentries[i]);

	debugfs_remove(iwm->dbg.dbg_modules_dentry);
	debugfs_remove(iwm->dbg.dbg_level_dentry);
	debugfs_remove(iwm->dbg.txq_dentry);
	debugfs_remove(iwm->dbg.tx_credit_dentry);
	debugfs_remove(iwm->dbg.rx_ticket_dentry);
	debugfs_remove(iwm->dbg.fw_err_dentry);
	if (iwm->bus_ops->debugfs_exit)
	iwm->bus_ops->debugfs_exit(iwm);

	debugfs_remove(iwm->dbg.busdir);
	debugfs_remove(iwm->dbg.dbgdir);
	debugfs_remove(iwm->dbg.txdir);
	debugfs_remove(iwm->dbg.rxdir);
	debugfs_remove(iwm->dbg.devdir);
	debugfs_remove(iwm->dbg.rootdir);
	}