[net-next-2.6.git] / drivers / net / wireless / rt2x00 / rt2x00debug.c

/*
	Copyright (C) 2004 - 2008 rt2x00 SourceForge Project
	<http://rt2x00.serialmonkey.com>

	This program is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; either version 2 of the License, or
	(at your option) any later version.

	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.,
	59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

/*
	Module: rt2x00lib
	Abstract: rt2x00 debugfs specific routines.
 */

#include <linux/debugfs.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/poll.h>
#include <linux/uaccess.h>

#include "rt2x00.h"
#include "rt2x00lib.h"
#include "rt2x00dump.h"

#define MAX_LINE_LENGTH 64

struct rt2x00debug_intf {
	/*
	 * Pointer to driver structure where
	 * this debugfs entry belongs to.
	 */
	struct rt2x00_dev *rt2x00dev;

	/*
	 * Reference to the rt2x00debug structure
	 * which can be used to communicate with
	 * the registers.
	 */
	const struct rt2x00debug *debug;

	/*
	 * Debugfs entries for:
	 * - driver folder
	 *   - driver file
	 *   - chipset file
	 *   - device flags file
	 *   - register folder
	 *     - csr offset/value files
	 *     - eeprom offset/value files
	 *     - bbp offset/value files
	 *     - rf offset/value files
	 *   - queue folder
	 *     - frame dump file
	 *     - queue stats file
	 */
	struct dentry *driver_folder;
	struct dentry *driver_entry;
	struct dentry *chipset_entry;
	struct dentry *dev_flags;
	struct dentry *register_folder;
	struct dentry *csr_off_entry;
	struct dentry *csr_val_entry;
	struct dentry *eeprom_off_entry;
	struct dentry *eeprom_val_entry;
	struct dentry *bbp_off_entry;
	struct dentry *bbp_val_entry;
	struct dentry *rf_off_entry;
	struct dentry *rf_val_entry;
	struct dentry *queue_folder;
	struct dentry *queue_frame_dump_entry;
	struct dentry *queue_stats_entry;

	/*
	 * The frame dump file only allows a single reader,
	 * so we need to store the current state here.
	 */
	unsigned long frame_dump_flags;
#define FRAME_DUMP_FILE_OPEN	1

	/*
	 * We queue each frame before dumping it to the user,
	 * per read command we will pass a single skb structure
	 * so we should be prepared to queue multiple sk buffers
	 * before sending it to userspace.
	 */
	struct sk_buff_head frame_dump_skbqueue;
	wait_queue_head_t frame_dump_waitqueue;

	/*
	 * Driver and chipset files will use a data buffer
	 * that has been created in advance. This will simplify
	 * the code since we can use the debugfs functions.
	 */
	struct debugfs_blob_wrapper driver_blob;
	struct debugfs_blob_wrapper chipset_blob;

	/*
	 * Requested offset for each register type.
	 */
	unsigned int offset_csr;
	unsigned int offset_eeprom;
	unsigned int offset_bbp;
	unsigned int offset_rf;
};

void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
			    enum rt2x00_dump_type type, struct sk_buff *skb)
{
	struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
	struct skb_frame_desc *desc = get_skb_frame_desc(skb);
	struct sk_buff *skbcopy;
	struct rt2x00dump_hdr *dump_hdr;
	struct timeval timestamp;

	do_gettimeofday(&timestamp);

	if (!test_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags))
		return;

	if (skb_queue_len(&intf->frame_dump_skbqueue) > 20) {
		DEBUG(rt2x00dev, "txrx dump queue length exceeded.\n");
		return;
	}

	skbcopy = alloc_skb(sizeof(*dump_hdr) + desc->desc_len + skb->len,
			    GFP_ATOMIC);
	if (!skbcopy) {
		DEBUG(rt2x00dev, "Failed to copy skb for dump.\n");
		return;
	}

	dump_hdr = (struct rt2x00dump_hdr *)skb_put(skbcopy, sizeof(*dump_hdr));
	dump_hdr->version = cpu_to_le32(DUMP_HEADER_VERSION);
	dump_hdr->header_length = cpu_to_le32(sizeof(*dump_hdr));
	dump_hdr->desc_length = cpu_to_le32(desc->desc_len);
	dump_hdr->data_length = cpu_to_le32(skb->len);
	dump_hdr->chip_rt = cpu_to_le16(rt2x00dev->chip.rt);
	dump_hdr->chip_rf = cpu_to_le16(rt2x00dev->chip.rf);
	dump_hdr->chip_rev = cpu_to_le32(rt2x00dev->chip.rev);
	dump_hdr->type = cpu_to_le16(type);
	dump_hdr->queue_index = desc->entry->queue->qid;
	dump_hdr->entry_index = desc->entry->entry_idx;
	dump_hdr->timestamp_sec = cpu_to_le32(timestamp.tv_sec);
	dump_hdr->timestamp_usec = cpu_to_le32(timestamp.tv_usec);

	memcpy(skb_put(skbcopy, desc->desc_len), desc->desc, desc->desc_len);
	memcpy(skb_put(skbcopy, skb->len), skb->data, skb->len);

	skb_queue_tail(&intf->frame_dump_skbqueue, skbcopy);
	wake_up_interruptible(&intf->frame_dump_waitqueue);

	/*
	 * Verify that the file has not been closed while we were working.
	 */
	if (!test_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags))
		skb_queue_purge(&intf->frame_dump_skbqueue);
}

static int rt2x00debug_file_open(struct inode *inode, struct file *file)
{
	struct rt2x00debug_intf *intf = inode->i_private;

	file->private_data = inode->i_private;

	if (!try_module_get(intf->debug->owner))
		return -EBUSY;

	return 0;
}

static int rt2x00debug_file_release(struct inode *inode, struct file *file)
{
	struct rt2x00debug_intf *intf = file->private_data;

	module_put(intf->debug->owner);

	return 0;
}

static int rt2x00debug_open_queue_dump(struct inode *inode, struct file *file)
{
	struct rt2x00debug_intf *intf = inode->i_private;
	int retval;

	retval = rt2x00debug_file_open(inode, file);
	if (retval)
		return retval;

	if (test_and_set_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags)) {
		rt2x00debug_file_release(inode, file);
		return -EBUSY;
	}

	return 0;
}

static int rt2x00debug_release_queue_dump(struct inode *inode, struct file *file)
{
	struct rt2x00debug_intf *intf = inode->i_private;

	skb_queue_purge(&intf->frame_dump_skbqueue);

	clear_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags);

	return rt2x00debug_file_release(inode, file);
}

static ssize_t rt2x00debug_read_queue_dump(struct file *file,
					   char __user *buf,
					   size_t length,
					   loff_t *offset)
{
	struct rt2x00debug_intf *intf = file->private_data;
	struct sk_buff *skb;
	size_t status;
	int retval;

	if (file->f_flags & O_NONBLOCK)
		return -EAGAIN;

	retval =
	    wait_event_interruptible(intf->frame_dump_waitqueue,
				     (skb =
				     skb_dequeue(&intf->frame_dump_skbqueue)));
	if (retval)
		return retval;

	status = min((size_t)skb->len, length);
	if (copy_to_user(buf, skb->data, status)) {
		status = -EFAULT;
		goto exit;
	}

	*offset += status;

exit:
	kfree_skb(skb);

	return status;
}

static unsigned int rt2x00debug_poll_queue_dump(struct file *file,
					        poll_table *wait)
{
	struct rt2x00debug_intf *intf = file->private_data;

	poll_wait(file, &intf->frame_dump_waitqueue, wait);

	if (!skb_queue_empty(&intf->frame_dump_skbqueue))
		return POLLOUT | POLLWRNORM;

	return 0;
}

static const struct file_operations rt2x00debug_fop_queue_dump = {
	.owner		= THIS_MODULE,
	.read		= rt2x00debug_read_queue_dump,
	.poll		= rt2x00debug_poll_queue_dump,
	.open		= rt2x00debug_open_queue_dump,
	.release	= rt2x00debug_release_queue_dump,
};

static ssize_t rt2x00debug_read_queue_stats(struct file *file,
					    char __user *buf,
					    size_t length,
					    loff_t *offset)
{
	struct rt2x00debug_intf *intf = file->private_data;
	struct data_queue *queue;
	unsigned long irqflags;
	unsigned int lines = 1 + intf->rt2x00dev->data_queues;
	size_t size;
	char *data;
	char *temp;

	if (*offset)
		return 0;

	data = kzalloc(lines * MAX_LINE_LENGTH, GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	temp = data +
	    sprintf(data, "qid\tcount\tlimit\tlength\tindex\tdone\tcrypto\n");

	queue_for_each(intf->rt2x00dev, queue) {
		spin_lock_irqsave(&queue->lock, irqflags);

		temp += sprintf(temp, "%d\t%d\t%d\t%d\t%d\t%d\t%d\n", queue->qid,
				queue->count, queue->limit, queue->length,
				queue->index[Q_INDEX],
				queue->index[Q_INDEX_DONE],
				queue->index[Q_INDEX_CRYPTO]);

		spin_unlock_irqrestore(&queue->lock, irqflags);
	}

	size = strlen(data);
	size = min(size, length);

	if (copy_to_user(buf, data, size)) {
		kfree(data);
		return -EFAULT;
	}

	kfree(data);

	*offset += size;
	return size;
}

static const struct file_operations rt2x00debug_fop_queue_stats = {
	.owner		= THIS_MODULE,
	.read		= rt2x00debug_read_queue_stats,
	.open		= rt2x00debug_file_open,
	.release	= rt2x00debug_file_release,
};

#define RT2X00DEBUGFS_OPS_READ(__name, __format, __type)	\
static ssize_t rt2x00debug_read_##__name(struct file *file,	\
					 char __user *buf,	\
					 size_t length,		\
					 loff_t *offset)	\
{								\
	struct rt2x00debug_intf *intf = file->private_data;	\
	const struct rt2x00debug *debug = intf->debug;		\
	char line[16];						\
	size_t size;						\
	__type value;						\
								\
	if (*offset)						\
		return 0;					\
								\
	if (intf->offset_##__name >= debug->__name.word_count)	\
		return -EINVAL;					\
								\
	debug->__name.read(intf->rt2x00dev,			\
			   intf->offset_##__name, &value);	\
								\
	size = sprintf(line, __format, value);			\
								\
	if (copy_to_user(buf, line, size))			\
		return -EFAULT;					\
								\
	*offset += size;					\
	return size;						\
}

#define RT2X00DEBUGFS_OPS_WRITE(__name, __type)			\
static ssize_t rt2x00debug_write_##__name(struct file *file,	\
					  const char __user *buf,\
					  size_t length,	\
					  loff_t *offset)	\
{								\
	struct rt2x00debug_intf *intf = file->private_data;	\
	const struct rt2x00debug *debug = intf->debug;		\
	char line[16];						\
	size_t size;						\
	__type value;						\
								\
	if (*offset)						\
		return 0;					\
								\
	if (!capable(CAP_NET_ADMIN))				\
		return -EPERM;					\
								\
	if (intf->offset_##__name >= debug->__name.word_count)	\
		return -EINVAL;					\
								\
	if (copy_from_user(line, buf, length))			\
		return -EFAULT;					\
								\
	size = strlen(line);					\
	value = simple_strtoul(line, NULL, 0);			\
								\
	debug->__name.write(intf->rt2x00dev,			\
			    intf->offset_##__name, value);	\
								\
	*offset += size;					\
	return size;						\
}

#define RT2X00DEBUGFS_OPS(__name, __format, __type)		\
RT2X00DEBUGFS_OPS_READ(__name, __format, __type);		\
RT2X00DEBUGFS_OPS_WRITE(__name, __type);			\
								\
static const struct file_operations rt2x00debug_fop_##__name = {\
	.owner		= THIS_MODULE,				\
	.read		= rt2x00debug_read_##__name,		\
	.write		= rt2x00debug_write_##__name,		\
	.open		= rt2x00debug_file_open,		\
	.release	= rt2x00debug_file_release,		\
};

RT2X00DEBUGFS_OPS(csr, "0x%.8x\n", u32);
RT2X00DEBUGFS_OPS(eeprom, "0x%.4x\n", u16);
RT2X00DEBUGFS_OPS(bbp, "0x%.2x\n", u8);
RT2X00DEBUGFS_OPS(rf, "0x%.8x\n", u32);

static ssize_t rt2x00debug_read_dev_flags(struct file *file,
					  char __user *buf,
					  size_t length,
					  loff_t *offset)
{
	struct rt2x00debug_intf *intf =	file->private_data;
	char line[16];
	size_t size;

	if (*offset)
		return 0;

	size = sprintf(line, "0x%.8x\n", (unsigned int)intf->rt2x00dev->flags);

	if (copy_to_user(buf, line, size))
		return -EFAULT;

	*offset += size;
	return size;
}

static const struct file_operations rt2x00debug_fop_dev_flags = {
	.owner		= THIS_MODULE,
	.read		= rt2x00debug_read_dev_flags,
	.open		= rt2x00debug_file_open,
	.release	= rt2x00debug_file_release,
};

static struct dentry *rt2x00debug_create_file_driver(const char *name,
						     struct rt2x00debug_intf
						     *intf,
						     struct debugfs_blob_wrapper
						     *blob)
{
	char *data;

	data = kzalloc(3 * MAX_LINE_LENGTH, GFP_KERNEL);
	if (!data)
		return NULL;

	blob->data = data;
	data += sprintf(data, "driver: %s\n", intf->rt2x00dev->ops->name);
	data += sprintf(data, "version: %s\n", DRV_VERSION);
	data += sprintf(data, "compiled: %s %s\n", __DATE__, __TIME__);
	blob->size = strlen(blob->data);

	return debugfs_create_blob(name, S_IRUGO, intf->driver_folder, blob);
}

static struct dentry *rt2x00debug_create_file_chipset(const char *name,
						      struct rt2x00debug_intf
						      *intf,
						      struct
						      debugfs_blob_wrapper
						      *blob)
{
	const struct rt2x00debug *debug = intf->debug;
	char *data;

	data = kzalloc(8 * MAX_LINE_LENGTH, GFP_KERNEL);
	if (!data)
		return NULL;

	blob->data = data;
	data += sprintf(data, "rt chip: %04x\n", intf->rt2x00dev->chip.rt);
	data += sprintf(data, "rf chip: %04x\n", intf->rt2x00dev->chip.rf);
	data += sprintf(data, "revision:%08x\n", intf->rt2x00dev->chip.rev);
	data += sprintf(data, "\n");
	data += sprintf(data, "csr length: %d\n", debug->csr.word_count);
	data += sprintf(data, "eeprom length: %d\n", debug->eeprom.word_count);
	data += sprintf(data, "bbp length: %d\n", debug->bbp.word_count);
	data += sprintf(data, "rf length: %d\n", debug->rf.word_count);
	blob->size = strlen(blob->data);

	return debugfs_create_blob(name, S_IRUGO, intf->driver_folder, blob);
}

void rt2x00debug_register(struct rt2x00_dev *rt2x00dev)
{
	const struct rt2x00debug *debug = rt2x00dev->ops->debugfs;
	struct rt2x00debug_intf *intf;

	intf = kzalloc(sizeof(struct rt2x00debug_intf), GFP_KERNEL);
	if (!intf) {
		ERROR(rt2x00dev, "Failed to allocate debug handler.\n");
		return;
	}

	intf->debug = debug;
	intf->rt2x00dev = rt2x00dev;
	rt2x00dev->debugfs_intf = intf;

	intf->driver_folder =
	    debugfs_create_dir(intf->rt2x00dev->ops->name,
			       rt2x00dev->hw->wiphy->debugfsdir);
	if (IS_ERR(intf->driver_folder))
		goto exit;

	intf->driver_entry =
	    rt2x00debug_create_file_driver("driver", intf, &intf->driver_blob);
	if (IS_ERR(intf->driver_entry))
		goto exit;

	intf->chipset_entry =
	    rt2x00debug_create_file_chipset("chipset",
					    intf, &intf->chipset_blob);
	if (IS_ERR(intf->chipset_entry))
		goto exit;

	intf->dev_flags = debugfs_create_file("dev_flags", S_IRUGO,
					      intf->driver_folder, intf,
					      &rt2x00debug_fop_dev_flags);
	if (IS_ERR(intf->dev_flags))
		goto exit;

	intf->register_folder =
	    debugfs_create_dir("register", intf->driver_folder);
	if (IS_ERR(intf->register_folder))
		goto exit;

#define RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(__intf, __name)	\
({								\
	(__intf)->__name##_off_entry =				\
	    debugfs_create_u32(__stringify(__name) "_offset",	\
			       S_IRUGO | S_IWUSR,		\
			       (__intf)->register_folder,	\
			       &(__intf)->offset_##__name);	\
	if (IS_ERR((__intf)->__name##_off_entry))		\
		goto exit;					\
								\
	(__intf)->__name##_val_entry =				\
	    debugfs_create_file(__stringify(__name) "_value",	\
				S_IRUGO | S_IWUSR,		\
				(__intf)->register_folder,	\
				(__intf), &rt2x00debug_fop_##__name);\
	if (IS_ERR((__intf)->__name##_val_entry))		\
		goto exit;					\
})

	RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, csr);
	RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, eeprom);
	RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, bbp);
	RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, rf);

#undef RT2X00DEBUGFS_CREATE_REGISTER_ENTRY

	intf->queue_folder =
	    debugfs_create_dir("queue", intf->driver_folder);
	if (IS_ERR(intf->queue_folder))
		goto exit;

	intf->queue_frame_dump_entry =
	    debugfs_create_file("dump", S_IRUGO, intf->queue_folder,
				intf, &rt2x00debug_fop_queue_dump);
	if (IS_ERR(intf->queue_frame_dump_entry))
		goto exit;

	skb_queue_head_init(&intf->frame_dump_skbqueue);
	init_waitqueue_head(&intf->frame_dump_waitqueue);

	intf->queue_stats_entry =
	    debugfs_create_file("queue", S_IRUGO, intf->queue_folder,
				intf, &rt2x00debug_fop_queue_stats);

	return;

exit:
	rt2x00debug_deregister(rt2x00dev);
	ERROR(rt2x00dev, "Failed to register debug handler.\n");

	return;
}

void rt2x00debug_deregister(struct rt2x00_dev *rt2x00dev)
{
	struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;

	if (unlikely(!intf))
		return;

	skb_queue_purge(&intf->frame_dump_skbqueue);

	debugfs_remove(intf->queue_stats_entry);
	debugfs_remove(intf->queue_frame_dump_entry);
	debugfs_remove(intf->queue_folder);
	debugfs_remove(intf->rf_val_entry);
	debugfs_remove(intf->rf_off_entry);
	debugfs_remove(intf->bbp_val_entry);
	debugfs_remove(intf->bbp_off_entry);
	debugfs_remove(intf->eeprom_val_entry);
	debugfs_remove(intf->eeprom_off_entry);
	debugfs_remove(intf->csr_val_entry);
	debugfs_remove(intf->csr_off_entry);
	debugfs_remove(intf->register_folder);
	debugfs_remove(intf->dev_flags);
	debugfs_remove(intf->chipset_entry);
	debugfs_remove(intf->driver_entry);
	debugfs_remove(intf->driver_folder);
	kfree(intf->chipset_blob.data);
	kfree(intf->driver_blob.data);
	kfree(intf);

	rt2x00dev->debugfs_intf = NULL;
}
Commit	Line	Data
95ea3627	1	/*
811aa9ca	2	Copyright (C) 2004 - 2008 rt2x00 SourceForge Project
95ea3627 ID	3	<http://rt2x00.serialmonkey.com>
	4
	5	This program is free software; you can redistribute it and/or modify
	6	it under the terms of the GNU General Public License as published by
	7	the Free Software Foundation; either version 2 of the License, or
	8	(at your option) any later version.
	9
	10	This program is distributed in the hope that it will be useful,
	11	but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	GNU General Public License for more details.
	14
	15	You should have received a copy of the GNU General Public License
	16	along with this program; if not, write to the
	17	Free Software Foundation, Inc.,
	18	59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	19	*/
	20
	21	/*
	22	Module: rt2x00lib
	23	Abstract: rt2x00 debugfs specific routines.
	24	*/
	25
95ea3627 ID	26	#include <linux/debugfs.h>
	27	#include <linux/kernel.h>
	28	#include <linux/module.h>
4d8dd66c	29	#include <linux/poll.h>
95ea3627 ID	30	#include <linux/uaccess.h>
	31
	32	#include "rt2x00.h"
	33	#include "rt2x00lib.h"
4d8dd66c	34	#include "rt2x00dump.h"
95ea3627	35
68598d29	36	#define MAX_LINE_LENGTH 64
95ea3627 ID	37
	38	struct rt2x00debug_intf {
	39	/*
	40	* Pointer to driver structure where
	41	* this debugfs entry belongs to.
	42	*/
	43	struct rt2x00_dev *rt2x00dev;
	44
	45	/*
	46	* Reference to the rt2x00debug structure
	47	* which can be used to communicate with
	48	* the registers.
	49	*/
	50	const struct rt2x00debug *debug;
	51
	52	/*
	53	* Debugfs entries for:
	54	* - driver folder
91921a4e ID	55	* - driver file
	56	* - chipset file
	57	* - device flags file
	58	* - register folder
	59	* - csr offset/value files
	60	* - eeprom offset/value files
	61	* - bbp offset/value files
	62	* - rf offset/value files
68598d29	63	* - queue folder
4d8dd66c	64	* - frame dump file
68598d29	65	* - queue stats file
95ea3627 ID	66	*/
	67	struct dentry *driver_folder;
	68	struct dentry *driver_entry;
	69	struct dentry *chipset_entry;
643b2521	70	struct dentry *dev_flags;
91921a4e	71	struct dentry *register_folder;
95ea3627 ID	72	struct dentry *csr_off_entry;
	73	struct dentry *csr_val_entry;
	74	struct dentry *eeprom_off_entry;
	75	struct dentry *eeprom_val_entry;
	76	struct dentry *bbp_off_entry;
	77	struct dentry *bbp_val_entry;
	78	struct dentry *rf_off_entry;
	79	struct dentry *rf_val_entry;
68598d29 ID	80	struct dentry *queue_folder;
	81	struct dentry *queue_frame_dump_entry;
	82	struct dentry *queue_stats_entry;
4d8dd66c ID	83
	84	/*
	85	* The frame dump file only allows a single reader,
	86	* so we need to store the current state here.
	87	*/
	88	unsigned long frame_dump_flags;
	89	#define FRAME_DUMP_FILE_OPEN 1
	90
	91	/*
	92	* We queue each frame before dumping it to the user,
	93	* per read command we will pass a single skb structure
	94	* so we should be prepared to queue multiple sk buffers
	95	* before sending it to userspace.
	96	*/
	97	struct sk_buff_head frame_dump_skbqueue;
	98	wait_queue_head_t frame_dump_waitqueue;
95ea3627 ID	99
	100	/*
	101	* Driver and chipset files will use a data buffer
	102	* that has been created in advance. This will simplify
	103	* the code since we can use the debugfs functions.
	104	*/
	105	struct debugfs_blob_wrapper driver_blob;
	106	struct debugfs_blob_wrapper chipset_blob;
	107
	108	/*
	109	* Requested offset for each register type.
	110	*/
	111	unsigned int offset_csr;
	112	unsigned int offset_eeprom;
	113	unsigned int offset_bbp;
	114	unsigned int offset_rf;
	115	};
	116
4d8dd66c	117	void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
5a6e5999	118	enum rt2x00_dump_type type, struct sk_buff *skb)
4d8dd66c ID	119	{
4d8dd66c ID	120	struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
181d6902	121	struct skb_frame_desc *desc = get_skb_frame_desc(skb);
4d8dd66c ID	122	struct sk_buff *skbcopy;
	123	struct rt2x00dump_hdr *dump_hdr;
	124	struct timeval timestamp;
4d8dd66c ID	125
4d8dd66c ID	126	do_gettimeofday(&timestamp);
4d8dd66c ID	127
	128	if (!test_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags))
	129	return;
	130
	131	if (skb_queue_len(&intf->frame_dump_skbqueue) > 20) {
	132	DEBUG(rt2x00dev, "txrx dump queue length exceeded.\n");
	133	return;
	134	}
	135
d56d453a	136	skbcopy = alloc_skb(sizeof(*dump_hdr) + desc->desc_len + skb->len,
4d8dd66c ID	137	GFP_ATOMIC);
	138	if (!skbcopy) {
	139	DEBUG(rt2x00dev, "Failed to copy skb for dump.\n");
	140	return;
	141	}
	142
	143	dump_hdr = (struct rt2x00dump_hdr )skb_put(skbcopy, sizeof(dump_hdr));
	144	dump_hdr->version = cpu_to_le32(DUMP_HEADER_VERSION);
	145	dump_hdr->header_length = cpu_to_le32(sizeof(*dump_hdr));
	146	dump_hdr->desc_length = cpu_to_le32(desc->desc_len);
d56d453a	147	dump_hdr->data_length = cpu_to_le32(skb->len);
4d8dd66c ID	148	dump_hdr->chip_rt = cpu_to_le16(rt2x00dev->chip.rt);
	149	dump_hdr->chip_rf = cpu_to_le16(rt2x00dev->chip.rf);
	150	dump_hdr->chip_rev = cpu_to_le32(rt2x00dev->chip.rev);
5a6e5999	151	dump_hdr->type = cpu_to_le16(type);
181d6902	152	dump_hdr->queue_index = desc->entry->queue->qid;
04267104	153	dump_hdr->entry_index = desc->entry->entry_idx;
4d8dd66c ID	154	dump_hdr->timestamp_sec = cpu_to_le32(timestamp.tv_sec);
	155	dump_hdr->timestamp_usec = cpu_to_le32(timestamp.tv_usec);
	156
	157	memcpy(skb_put(skbcopy, desc->desc_len), desc->desc, desc->desc_len);
d56d453a	158	memcpy(skb_put(skbcopy, skb->len), skb->data, skb->len);
4d8dd66c ID	159
	160	skb_queue_tail(&intf->frame_dump_skbqueue, skbcopy);
	161	wake_up_interruptible(&intf->frame_dump_waitqueue);
	162
	163	/*
	164	* Verify that the file has not been closed while we were working.
	165	*/
	166	if (!test_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags))
	167	skb_queue_purge(&intf->frame_dump_skbqueue);
	168	}
	169
95ea3627 ID	170	static int rt2x00debug_file_open(struct inode inode, struct file file)
	171	{
	172	struct rt2x00debug_intf *intf = inode->i_private;
	173
	174	file->private_data = inode->i_private;
	175
	176	if (!try_module_get(intf->debug->owner))
	177	return -EBUSY;
	178
	179	return 0;
	180	}
	181
	182	static int rt2x00debug_file_release(struct inode inode, struct file file)
	183	{
	184	struct rt2x00debug_intf *intf = file->private_data;
	185
	186	module_put(intf->debug->owner);
	187
	188	return 0;
	189	}
	190
181d6902	191	static int rt2x00debug_open_queue_dump(struct inode inode, struct file file)
4d8dd66c ID	192	{
	193	struct rt2x00debug_intf *intf = inode->i_private;
	194	int retval;
	195
	196	retval = rt2x00debug_file_open(inode, file);
	197	if (retval)
	198	return retval;
	199
	200	if (test_and_set_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags)) {
	201	rt2x00debug_file_release(inode, file);
	202	return -EBUSY;
	203	}
	204
	205	return 0;
	206	}
	207
181d6902	208	static int rt2x00debug_release_queue_dump(struct inode inode, struct file file)
4d8dd66c ID	209	{
	210	struct rt2x00debug_intf *intf = inode->i_private;
	211
	212	skb_queue_purge(&intf->frame_dump_skbqueue);
	213
	214	clear_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags);
	215
	216	return rt2x00debug_file_release(inode, file);
	217	}
	218
181d6902 ID	219	static ssize_t rt2x00debug_read_queue_dump(struct file *file,
	220	char __user *buf,
	221	size_t length,
	222	loff_t *offset)
4d8dd66c ID	223	{
	224	struct rt2x00debug_intf *intf = file->private_data;
	225	struct sk_buff *skb;
	226	size_t status;
	227	int retval;
	228
	229	if (file->f_flags & O_NONBLOCK)
	230	return -EAGAIN;
	231
	232	retval =
	233	wait_event_interruptible(intf->frame_dump_waitqueue,
	234	(skb =
	235	skb_dequeue(&intf->frame_dump_skbqueue)));
	236	if (retval)
	237	return retval;
	238
	239	status = min((size_t)skb->len, length);
	240	if (copy_to_user(buf, skb->data, status)) {
	241	status = -EFAULT;
	242	goto exit;
	243	}
	244
	245	*offset += status;
	246
	247	exit:
	248	kfree_skb(skb);
	249
	250	return status;
	251	}
	252
181d6902 ID	253	static unsigned int rt2x00debug_poll_queue_dump(struct file *file,
181d6902 ID	254	poll_table *wait)
4d8dd66c ID	255	{
	256	struct rt2x00debug_intf *intf = file->private_data;
	257
	258	poll_wait(file, &intf->frame_dump_waitqueue, wait);
	259
	260	if (!skb_queue_empty(&intf->frame_dump_skbqueue))
	261	return POLLOUT \| POLLWRNORM;
	262
	263	return 0;
	264	}
	265
181d6902	266	static const struct file_operations rt2x00debug_fop_queue_dump = {
4d8dd66c	267	.owner = THIS_MODULE,
181d6902 ID	268	.read = rt2x00debug_read_queue_dump,
	269	.poll = rt2x00debug_poll_queue_dump,
	270	.open = rt2x00debug_open_queue_dump,
	271	.release = rt2x00debug_release_queue_dump,
4d8dd66c ID	272	};
4d8dd66c ID	273
68598d29 ID	274	static ssize_t rt2x00debug_read_queue_stats(struct file *file,
	275	char __user *buf,
	276	size_t length,
	277	loff_t *offset)
	278	{
	279	struct rt2x00debug_intf *intf = file->private_data;
	280	struct data_queue *queue;
5f46c4d0	281	unsigned long irqflags;
68598d29 ID	282	unsigned int lines = 1 + intf->rt2x00dev->data_queues;
	283	size_t size;
	284	char *data;
	285	char *temp;
	286
	287	if (*offset)
	288	return 0;
	289
	290	data = kzalloc(lines * MAX_LINE_LENGTH, GFP_KERNEL);
	291	if (!data)
	292	return -ENOMEM;
	293
	294	temp = data +
	295	sprintf(data, "qid\tcount\tlimit\tlength\tindex\tdone\tcrypto\n");
	296
	297	queue_for_each(intf->rt2x00dev, queue) {
5f46c4d0	298	spin_lock_irqsave(&queue->lock, irqflags);
68598d29 ID	299
	300	temp += sprintf(temp, "%d\t%d\t%d\t%d\t%d\t%d\t%d\n", queue->qid,
	301	queue->count, queue->limit, queue->length,
	302	queue->index[Q_INDEX],
	303	queue->index[Q_INDEX_DONE],
	304	queue->index[Q_INDEX_CRYPTO]);
	305
5f46c4d0	306	spin_unlock_irqrestore(&queue->lock, irqflags);
68598d29 ID	307	}
	308
	309	size = strlen(data);
	310	size = min(size, length);
	311
	312	if (copy_to_user(buf, data, size)) {
	313	kfree(data);
	314	return -EFAULT;
	315	}
	316
	317	kfree(data);
	318
	319	*offset += size;
	320	return size;
	321	}
	322
	323	static const struct file_operations rt2x00debug_fop_queue_stats = {
	324	.owner = THIS_MODULE,
	325	.read = rt2x00debug_read_queue_stats,
	326	.open = rt2x00debug_file_open,
	327	.release = rt2x00debug_file_release,
	328	};
	329
95ea3627 ID	330	#define RT2X00DEBUGFS_OPS_READ(__name, __format, __type) \
	331	static ssize_t rt2x00debug_read_##__name(struct file *file, \
	332	char __user *buf, \
	333	size_t length, \
	334	loff_t *offset) \
	335	{ \
91921a4e	336	struct rt2x00debug_intf *intf = file->private_data; \
95ea3627 ID	337	const struct rt2x00debug *debug = intf->debug; \
	338	char line[16]; \
	339	size_t size; \
	340	__type value; \
	341	\
	342	if (*offset) \
	343	return 0; \
	344	\
	345	if (intf->offset_##__name >= debug->__name.word_count) \
	346	return -EINVAL; \
	347	\
	348	debug->__name.read(intf->rt2x00dev, \
	349	intf->offset_##__name, &value); \
	350	\
	351	size = sprintf(line, __format, value); \
	352	\
	353	if (copy_to_user(buf, line, size)) \
	354	return -EFAULT; \
	355	\
	356	*offset += size; \
	357	return size; \
	358	}
	359
	360	#define RT2X00DEBUGFS_OPS_WRITE(__name, __type) \
	361	static ssize_t rt2x00debug_write_##__name(struct file *file, \
	362	const char __user *buf,\
	363	size_t length, \
	364	loff_t *offset) \
	365	{ \
91921a4e	366	struct rt2x00debug_intf *intf = file->private_data; \
95ea3627 ID	367	const struct rt2x00debug *debug = intf->debug; \
	368	char line[16]; \
	369	size_t size; \
	370	__type value; \
	371	\
	372	if (*offset) \
	373	return 0; \
	374	\
	375	if (!capable(CAP_NET_ADMIN)) \
	376	return -EPERM; \
	377	\
	378	if (intf->offset_##__name >= debug->__name.word_count) \
	379	return -EINVAL; \
	380	\
	381	if (copy_from_user(line, buf, length)) \
	382	return -EFAULT; \
	383	\
	384	size = strlen(line); \
	385	value = simple_strtoul(line, NULL, 0); \
	386	\
	387	debug->__name.write(intf->rt2x00dev, \
	388	intf->offset_##__name, value); \
	389	\
	390	*offset += size; \
	391	return size; \
	392	}
	393
	394	#define RT2X00DEBUGFS_OPS(__name, __format, __type) \
	395	RT2X00DEBUGFS_OPS_READ(__name, __format, __type); \
	396	RT2X00DEBUGFS_OPS_WRITE(__name, __type); \
	397	\
	398	static const struct file_operations rt2x00debug_fop_##__name = {\
	399	.owner = THIS_MODULE, \
	400	.read = rt2x00debug_read_##__name, \
	401	.write = rt2x00debug_write_##__name, \
	402	.open = rt2x00debug_file_open, \
	403	.release = rt2x00debug_file_release, \
	404	};
	405
	406	RT2X00DEBUGFS_OPS(csr, "0x%.8x\n", u32);
	407	RT2X00DEBUGFS_OPS(eeprom, "0x%.4x\n", u16);
	408	RT2X00DEBUGFS_OPS(bbp, "0x%.2x\n", u8);
	409	RT2X00DEBUGFS_OPS(rf, "0x%.8x\n", u32);
	410
643b2521 ID	411	static ssize_t rt2x00debug_read_dev_flags(struct file *file,
	412	char __user *buf,
	413	size_t length,
	414	loff_t *offset)
	415	{
	416	struct rt2x00debug_intf *intf = file->private_data;
	417	char line[16];
	418	size_t size;
	419
	420	if (*offset)
	421	return 0;
	422
	423	size = sprintf(line, "0x%.8x\n", (unsigned int)intf->rt2x00dev->flags);
	424
	425	if (copy_to_user(buf, line, size))
	426	return -EFAULT;
	427
	428	*offset += size;
	429	return size;
	430	}
	431
	432	static const struct file_operations rt2x00debug_fop_dev_flags = {
	433	.owner = THIS_MODULE,
	434	.read = rt2x00debug_read_dev_flags,
	435	.open = rt2x00debug_file_open,
	436	.release = rt2x00debug_file_release,
	437	};
	438
95ea3627 ID	439	static struct dentry rt2x00debug_create_file_driver(const char name,
	440	struct rt2x00debug_intf
	441	*intf,
	442	struct debugfs_blob_wrapper
	443	*blob)
	444	{
	445	char *data;
	446
68598d29	447	data = kzalloc(3 * MAX_LINE_LENGTH, GFP_KERNEL);
95ea3627 ID	448	if (!data)
	449	return NULL;
	450
	451	blob->data = data;
	452	data += sprintf(data, "driver: %s\n", intf->rt2x00dev->ops->name);
	453	data += sprintf(data, "version: %s\n", DRV_VERSION);
	454	data += sprintf(data, "compiled: %s %s\n", __DATE__, __TIME__);
	455	blob->size = strlen(blob->data);
	456
	457	return debugfs_create_blob(name, S_IRUGO, intf->driver_folder, blob);
	458	}
	459
	460	static struct dentry rt2x00debug_create_file_chipset(const char name,
	461	struct rt2x00debug_intf
	462	*intf,
	463	struct
	464	debugfs_blob_wrapper
	465	*blob)
	466	{
	467	const struct rt2x00debug *debug = intf->debug;
	468	char *data;
	469
68598d29	470	data = kzalloc(8 * MAX_LINE_LENGTH, GFP_KERNEL);
95ea3627 ID	471	if (!data)
	472	return NULL;
	473
3e34c6dc	474	blob->data = data;
22c96c28 ID	475	data += sprintf(data, "rt chip: %04x\n", intf->rt2x00dev->chip.rt);
	476	data += sprintf(data, "rf chip: %04x\n", intf->rt2x00dev->chip.rf);
	477	data += sprintf(data, "revision:%08x\n", intf->rt2x00dev->chip.rev);
	478	data += sprintf(data, "\n");
95ea3627 ID	479	data += sprintf(data, "csr length: %d\n", debug->csr.word_count);
	480	data += sprintf(data, "eeprom length: %d\n", debug->eeprom.word_count);
	481	data += sprintf(data, "bbp length: %d\n", debug->bbp.word_count);
	482	data += sprintf(data, "rf length: %d\n", debug->rf.word_count);
3e34c6dc	483	blob->size = strlen(blob->data);
95ea3627 ID	484
	485	return debugfs_create_blob(name, S_IRUGO, intf->driver_folder, blob);
	486	}
	487
	488	void rt2x00debug_register(struct rt2x00_dev *rt2x00dev)
	489	{
	490	const struct rt2x00debug *debug = rt2x00dev->ops->debugfs;
	491	struct rt2x00debug_intf *intf;
	492
	493	intf = kzalloc(sizeof(struct rt2x00debug_intf), GFP_KERNEL);
	494	if (!intf) {
	495	ERROR(rt2x00dev, "Failed to allocate debug handler.\n");
	496	return;
	497	}
	498
	499	intf->debug = debug;
	500	intf->rt2x00dev = rt2x00dev;
	501	rt2x00dev->debugfs_intf = intf;
	502
	503	intf->driver_folder =
	504	debugfs_create_dir(intf->rt2x00dev->ops->name,
	505	rt2x00dev->hw->wiphy->debugfsdir);
	506	if (IS_ERR(intf->driver_folder))
	507	goto exit;
	508
	509	intf->driver_entry =
	510	rt2x00debug_create_file_driver("driver", intf, &intf->driver_blob);
	511	if (IS_ERR(intf->driver_entry))
	512	goto exit;
	513
	514	intf->chipset_entry =
	515	rt2x00debug_create_file_chipset("chipset",
	516	intf, &intf->chipset_blob);
	517	if (IS_ERR(intf->chipset_entry))
	518	goto exit;
	519
643b2521 ID	520	intf->dev_flags = debugfs_create_file("dev_flags", S_IRUGO,
	521	intf->driver_folder, intf,
	522	&rt2x00debug_fop_dev_flags);
	523	if (IS_ERR(intf->dev_flags))
	524	goto exit;
	525
91921a4e ID	526	intf->register_folder =
	527	debugfs_create_dir("register", intf->driver_folder);
	528	if (IS_ERR(intf->register_folder))
	529	goto exit;
	530
	531	#define RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(__intf, __name) \
95ea3627 ID	532	({ \
	533	(__intf)->__name##_off_entry = \
	534	debugfs_create_u32(__stringify(__name) "_offset", \
	535	S_IRUGO \| S_IWUSR, \
91921a4e	536	(__intf)->register_folder, \
95ea3627 ID	537	&(__intf)->offset_##__name); \
	538	if (IS_ERR((__intf)->__name##_off_entry)) \
	539	goto exit; \
	540	\
	541	(__intf)->__name##_val_entry = \
	542	debugfs_create_file(__stringify(__name) "_value", \
	543	S_IRUGO \| S_IWUSR, \
91921a4e	544	(__intf)->register_folder, \
95ea3627 ID	545	(__intf), &rt2x00debug_fop_##__name);\
	546	if (IS_ERR((__intf)->__name##_val_entry)) \
	547	goto exit; \
	548	})
	549
91921a4e ID	550	RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, csr);
	551	RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, eeprom);
	552	RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, bbp);
	553	RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, rf);
95ea3627	554
91921a4e	555	#undef RT2X00DEBUGFS_CREATE_REGISTER_ENTRY
95ea3627	556
68598d29 ID	557	intf->queue_folder =
	558	debugfs_create_dir("queue", intf->driver_folder);
	559	if (IS_ERR(intf->queue_folder))
4d8dd66c ID	560	goto exit;
4d8dd66c ID	561
68598d29 ID	562	intf->queue_frame_dump_entry =
68598d29 ID	563	debugfs_create_file("dump", S_IRUGO, intf->queue_folder,
181d6902	564	intf, &rt2x00debug_fop_queue_dump);
68598d29	565	if (IS_ERR(intf->queue_frame_dump_entry))
4d8dd66c ID	566	goto exit;
	567
	568	skb_queue_head_init(&intf->frame_dump_skbqueue);
	569	init_waitqueue_head(&intf->frame_dump_waitqueue);
	570
68598d29 ID	571	intf->queue_stats_entry =
	572	debugfs_create_file("queue", S_IRUGO, intf->queue_folder,
	573	intf, &rt2x00debug_fop_queue_stats);
	574
95ea3627 ID	575	return;
	576
	577	exit:
	578	rt2x00debug_deregister(rt2x00dev);
	579	ERROR(rt2x00dev, "Failed to register debug handler.\n");
	580
	581	return;
	582	}
	583
	584	void rt2x00debug_deregister(struct rt2x00_dev *rt2x00dev)
	585	{
4d8dd66c	586	struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
95ea3627 ID	587
	588	if (unlikely(!intf))
	589	return;
	590
4d8dd66c ID	591	skb_queue_purge(&intf->frame_dump_skbqueue);
4d8dd66c ID	592
68598d29 ID	593	debugfs_remove(intf->queue_stats_entry);
	594	debugfs_remove(intf->queue_frame_dump_entry);
	595	debugfs_remove(intf->queue_folder);
95ea3627 ID	596	debugfs_remove(intf->rf_val_entry);
	597	debugfs_remove(intf->rf_off_entry);
	598	debugfs_remove(intf->bbp_val_entry);
	599	debugfs_remove(intf->bbp_off_entry);
	600	debugfs_remove(intf->eeprom_val_entry);
	601	debugfs_remove(intf->eeprom_off_entry);
	602	debugfs_remove(intf->csr_val_entry);
	603	debugfs_remove(intf->csr_off_entry);
91921a4e	604	debugfs_remove(intf->register_folder);
643b2521	605	debugfs_remove(intf->dev_flags);
95ea3627 ID	606	debugfs_remove(intf->chipset_entry);
	607	debugfs_remove(intf->driver_entry);
	608	debugfs_remove(intf->driver_folder);
	609	kfree(intf->chipset_blob.data);
	610	kfree(intf->driver_blob.data);
	611	kfree(intf);
	612
	613	rt2x00dev->debugfs_intf = NULL;
	614	}