drivers/crypto/ccp/ccp-debugfs.c - linux/torvalds/linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * AMD Cryptographic Coprocessor (CCP) driver
  *
  * Copyright (C) 2017 Advanced Micro Devices, Inc.
  *
  * Author: Gary R Hook <gary.hook@amd.com>
  */

 #include <linux/debugfs.h>
 #include <linux/ccp.h>

 #include "ccp-dev.h"

 /* DebugFS helpers */
 #define	OBUFP		(obuf + oboff)
 #define	OBUFLEN		512
 #define	OBUFSPC		(OBUFLEN - oboff)
 #define	OSCNPRINTF(fmt, ...) \
 		scnprintf(OBUFP, OBUFSPC, fmt, ## __VA_ARGS__)

 #define BUFLEN	63

 #define	RI_VERSION_NUM	0x0000003F
 #define	RI_AES_PRESENT	0x00000040
 #define	RI_3DES_PRESENT	0x00000080
 #define	RI_SHA_PRESENT	0x00000100
 #define	RI_RSA_PRESENT	0x00000200
 #define	RI_ECC_PRESENT	0x00000400
 #define	RI_ZDE_PRESENT	0x00000800
 #define	RI_ZCE_PRESENT	0x00001000
 #define	RI_TRNG_PRESENT	0x00002000
 #define	RI_ELFC_PRESENT	0x00004000
 #define	RI_ELFC_SHIFT	14
 #define	RI_NUM_VQM	0x00078000
 #define	RI_NVQM_SHIFT	15
 #define	RI_NVQM(r)	(((r) * RI_NUM_VQM) >> RI_NVQM_SHIFT)
 #define	RI_LSB_ENTRIES	0x0FF80000
 #define	RI_NLSB_SHIFT	19
 #define	RI_NLSB(r)	(((r) * RI_LSB_ENTRIES) >> RI_NLSB_SHIFT)

 static ssize_t ccp5_debugfs_info_read(struct file *filp, char __user *ubuf,
 				      size_t count, loff_t *offp)
 {
 	struct ccp_device *ccp = filp->private_data;
 	unsigned int oboff = 0;
 	unsigned int regval;
 	ssize_t ret;
 	char *obuf;

 	if (!ccp)
 		return 0;

 	obuf = kmalloc(OBUFLEN, GFP_KERNEL);
 	if (!obuf)
 		return -ENOMEM;

 	oboff += OSCNPRINTF("Device name: %s\n", ccp->name);
 	oboff += OSCNPRINTF("   RNG name: %s\n", ccp->rngname);
 	oboff += OSCNPRINTF("   # Queues: %d\n", ccp->cmd_q_count);
 	oboff += OSCNPRINTF("     # Cmds: %d\n", ccp->cmd_count);

 	regval = ioread32(ccp->io_regs + CMD5_PSP_CCP_VERSION);
 	oboff += OSCNPRINTF("    Version: %d\n", regval & RI_VERSION_NUM);
 	oboff += OSCNPRINTF("    Engines:");
 	if (regval & RI_AES_PRESENT)
 		oboff += OSCNPRINTF(" AES");
 	if (regval & RI_3DES_PRESENT)
 		oboff += OSCNPRINTF(" 3DES");
 	if (regval & RI_SHA_PRESENT)
 		oboff += OSCNPRINTF(" SHA");
 	if (regval & RI_RSA_PRESENT)
 		oboff += OSCNPRINTF(" RSA");
 	if (regval & RI_ECC_PRESENT)
 		oboff += OSCNPRINTF(" ECC");
 	if (regval & RI_ZDE_PRESENT)
 		oboff += OSCNPRINTF(" ZDE");
 	if (regval & RI_ZCE_PRESENT)
 		oboff += OSCNPRINTF(" ZCE");
 	if (regval & RI_TRNG_PRESENT)
 		oboff += OSCNPRINTF(" TRNG");
 	oboff += OSCNPRINTF("\n");
 	oboff += OSCNPRINTF("     Queues: %d\n",
 		   (regval & RI_NUM_VQM) >> RI_NVQM_SHIFT);
 	oboff += OSCNPRINTF("LSB Entries: %d\n",
 		   (regval & RI_LSB_ENTRIES) >> RI_NLSB_SHIFT);

 	ret = simple_read_from_buffer(ubuf, count, offp, obuf, oboff);
 	kfree(obuf);

 	return ret;
 }

 /* Return a formatted buffer containing the current
  * statistics across all queues for a CCP.
  */
 static ssize_t ccp5_debugfs_stats_read(struct file *filp, char __user *ubuf,
 				       size_t count, loff_t *offp)
 {
 	struct ccp_device *ccp = filp->private_data;
 	unsigned long total_xts_aes_ops = 0;
 	unsigned long total_3des_ops = 0;
 	unsigned long total_aes_ops = 0;
 	unsigned long total_sha_ops = 0;
 	unsigned long total_rsa_ops = 0;
 	unsigned long total_ecc_ops = 0;
 	unsigned long total_pt_ops = 0;
 	unsigned long total_ops = 0;
 	unsigned int oboff = 0;
 	ssize_t ret = 0;
 	unsigned int i;
 	char *obuf;

 	for (i = 0; i < ccp->cmd_q_count; i++) {
 		struct ccp_cmd_queue *cmd_q = &ccp->cmd_q[i];

 		total_ops += cmd_q->total_ops;
 		total_aes_ops += cmd_q->total_aes_ops;
 		total_xts_aes_ops += cmd_q->total_xts_aes_ops;
 		total_3des_ops += cmd_q->total_3des_ops;
 		total_sha_ops += cmd_q->total_sha_ops;
 		total_rsa_ops += cmd_q->total_rsa_ops;
 		total_pt_ops += cmd_q->total_pt_ops;
 		total_ecc_ops += cmd_q->total_ecc_ops;
 	}

 	obuf = kmalloc(OBUFLEN, GFP_KERNEL);
 	if (!obuf)
 		return -ENOMEM;

 	oboff += OSCNPRINTF("Total Interrupts Handled: %ld\n",
 			    ccp->total_interrupts);
 	oboff += OSCNPRINTF("        Total Operations: %ld\n",
 			    total_ops);
 	oboff += OSCNPRINTF("                     AES: %ld\n",
 			    total_aes_ops);
 	oboff += OSCNPRINTF("                 XTS AES: %ld\n",
 			    total_xts_aes_ops);
 	oboff += OSCNPRINTF("                     SHA: %ld\n",
 			    total_3des_ops);
 	oboff += OSCNPRINTF("                     SHA: %ld\n",
 			    total_sha_ops);
 	oboff += OSCNPRINTF("                     RSA: %ld\n",
 			    total_rsa_ops);
 	oboff += OSCNPRINTF("               Pass-Thru: %ld\n",
 			    total_pt_ops);
 	oboff += OSCNPRINTF("                     ECC: %ld\n",
 			    total_ecc_ops);

 	ret = simple_read_from_buffer(ubuf, count, offp, obuf, oboff);
 	kfree(obuf);

 	return ret;
 }

 /* Reset the counters in a queue
  */
 static void ccp5_debugfs_reset_queue_stats(struct ccp_cmd_queue *cmd_q)
 {
 	cmd_q->total_ops = 0L;
 	cmd_q->total_aes_ops = 0L;
 	cmd_q->total_xts_aes_ops = 0L;
 	cmd_q->total_3des_ops = 0L;
 	cmd_q->total_sha_ops = 0L;
 	cmd_q->total_rsa_ops = 0L;
 	cmd_q->total_pt_ops = 0L;
 	cmd_q->total_ecc_ops = 0L;
 }

 /* A value was written to the stats variable, which
  * should be used to reset the queue counters across
  * that device.
  */
 static ssize_t ccp5_debugfs_stats_write(struct file *filp,
 					const char __user *ubuf,
 					size_t count, loff_t *offp)
 {
 	struct ccp_device *ccp = filp->private_data;
 	int i;

 	for (i = 0; i < ccp->cmd_q_count; i++)
 		ccp5_debugfs_reset_queue_stats(&ccp->cmd_q[i]);
 	ccp->total_interrupts = 0L;

 	return count;
 }

 /* Return a formatted buffer containing the current information
  * for that queue
  */
 static ssize_t ccp5_debugfs_queue_read(struct file *filp, char __user *ubuf,
 				       size_t count, loff_t *offp)
 {
 	struct ccp_cmd_queue *cmd_q = filp->private_data;
 	unsigned int oboff = 0;
 	unsigned int regval;
 	ssize_t ret;
 	char *obuf;

 	if (!cmd_q)
 		return 0;

 	obuf = kmalloc(OBUFLEN, GFP_KERNEL);
 	if (!obuf)
 		return -ENOMEM;

 	oboff += OSCNPRINTF("  Total Queue Operations: %ld\n",
 			    cmd_q->total_ops);
 	oboff += OSCNPRINTF("                     AES: %ld\n",
 			    cmd_q->total_aes_ops);
 	oboff += OSCNPRINTF("                 XTS AES: %ld\n",
 			    cmd_q->total_xts_aes_ops);
 	oboff += OSCNPRINTF("                     SHA: %ld\n",
 			    cmd_q->total_3des_ops);
 	oboff += OSCNPRINTF("                     SHA: %ld\n",
 			    cmd_q->total_sha_ops);
 	oboff += OSCNPRINTF("                     RSA: %ld\n",
 			    cmd_q->total_rsa_ops);
 	oboff += OSCNPRINTF("               Pass-Thru: %ld\n",
 			    cmd_q->total_pt_ops);
 	oboff += OSCNPRINTF("                     ECC: %ld\n",
 			    cmd_q->total_ecc_ops);

 	regval = ioread32(cmd_q->reg_int_enable);
 	oboff += OSCNPRINTF("      Enabled Interrupts:");
 	if (regval & INT_EMPTY_QUEUE)
 		oboff += OSCNPRINTF(" EMPTY");
 	if (regval & INT_QUEUE_STOPPED)
 		oboff += OSCNPRINTF(" STOPPED");
 	if (regval & INT_ERROR)
 		oboff += OSCNPRINTF(" ERROR");
 	if (regval & INT_COMPLETION)
 		oboff += OSCNPRINTF(" COMPLETION");
 	oboff += OSCNPRINTF("\n");

 	ret = simple_read_from_buffer(ubuf, count, offp, obuf, oboff);
 	kfree(obuf);

 	return ret;
 }

 /* A value was written to the stats variable for a
  * queue. Reset the queue counters to this value.
  */
 static ssize_t ccp5_debugfs_queue_write(struct file *filp,
 					const char __user *ubuf,
 					size_t count, loff_t *offp)
 {
 	struct ccp_cmd_queue *cmd_q = filp->private_data;

 	ccp5_debugfs_reset_queue_stats(cmd_q);

 	return count;
 }

 static const struct file_operations ccp_debugfs_info_ops = {
 	.owner = THIS_MODULE,
 	.open = simple_open,
 	.read = ccp5_debugfs_info_read,
 	.write = NULL,
 };

 static const struct file_operations ccp_debugfs_queue_ops = {
 	.owner = THIS_MODULE,
 	.open = simple_open,
 	.read = ccp5_debugfs_queue_read,
 	.write = ccp5_debugfs_queue_write,
 };

 static const struct file_operations ccp_debugfs_stats_ops = {
 	.owner = THIS_MODULE,
 	.open = simple_open,
 	.read = ccp5_debugfs_stats_read,
 	.write = ccp5_debugfs_stats_write,
 };

 static struct dentry *ccp_debugfs_dir;
 static DEFINE_MUTEX(ccp_debugfs_lock);

 #define	MAX_NAME_LEN	20

 void ccp5_debugfs_setup(struct ccp_device *ccp)
 {
 	struct ccp_cmd_queue *cmd_q;
 	char name[MAX_NAME_LEN + 1];
 	struct dentry *debugfs_q_instance;
 	int i;

 	if (!debugfs_initialized())
 		return;

 	mutex_lock(&ccp_debugfs_lock);
 	if (!ccp_debugfs_dir)
 		ccp_debugfs_dir = debugfs_create_dir(KBUILD_MODNAME, NULL);
 	mutex_unlock(&ccp_debugfs_lock);

 	ccp->debugfs_instance = debugfs_create_dir(ccp->name, ccp_debugfs_dir);

 	debugfs_create_file("info", 0400, ccp->debugfs_instance, ccp,
 			    &ccp_debugfs_info_ops);

 	debugfs_create_file("stats", 0600, ccp->debugfs_instance, ccp,
 			    &ccp_debugfs_stats_ops);

 	for (i = 0; i < ccp->cmd_q_count; i++) {
 		cmd_q = &ccp->cmd_q[i];

 		snprintf(name, MAX_NAME_LEN - 1, "q%d", cmd_q->id);

 		debugfs_q_instance =
 			debugfs_create_dir(name, ccp->debugfs_instance);

 		debugfs_create_file("stats", 0600, debugfs_q_instance, cmd_q,
 				    &ccp_debugfs_queue_ops);
 	}

 	return;
 }

 void ccp5_debugfs_destroy(void)
 {
 	debugfs_remove_recursive(ccp_debugfs_dir);
 }
	// SPDX-License-Identifier: GPL-2.0-only
	/*
	* AMD Cryptographic Coprocessor (CCP) driver
	*
	* Copyright (C) 2017 Advanced Micro Devices, Inc.
	*
	* Author: Gary R Hook <gary.hook@amd.com>
	*/

	#include <linux/debugfs.h>
	#include <linux/ccp.h>

	#include "ccp-dev.h"

	/* DebugFS helpers */
	#define OBUFP (obuf + oboff)
	#define OBUFLEN 512
	#define OBUFSPC (OBUFLEN - oboff)
	#define OSCNPRINTF(fmt, ...) \
	scnprintf(OBUFP, OBUFSPC, fmt, ## __VA_ARGS__)

	#define BUFLEN 63

	#define RI_VERSION_NUM 0x0000003F
	#define RI_AES_PRESENT 0x00000040
	#define RI_3DES_PRESENT 0x00000080
	#define RI_SHA_PRESENT 0x00000100
	#define RI_RSA_PRESENT 0x00000200
	#define RI_ECC_PRESENT 0x00000400
	#define RI_ZDE_PRESENT 0x00000800
	#define RI_ZCE_PRESENT 0x00001000
	#define RI_TRNG_PRESENT 0x00002000
	#define RI_ELFC_PRESENT 0x00004000
	#define RI_ELFC_SHIFT 14
	#define RI_NUM_VQM 0x00078000
	#define RI_NVQM_SHIFT 15
	#define RI_NVQM(r) (((r) * RI_NUM_VQM) >> RI_NVQM_SHIFT)
	#define RI_LSB_ENTRIES 0x0FF80000
	#define RI_NLSB_SHIFT 19
	#define RI_NLSB(r) (((r) * RI_LSB_ENTRIES) >> RI_NLSB_SHIFT)

	static ssize_t ccp5_debugfs_info_read(struct file filp, char __user ubuf,
	size_t count, loff_t *offp)
	{
	struct ccp_device *ccp = filp->private_data;
	unsigned int oboff = 0;
	unsigned int regval;
	ssize_t ret;
	char *obuf;

	if (!ccp)
	return 0;

	obuf = kmalloc(OBUFLEN, GFP_KERNEL);
	if (!obuf)
	return -ENOMEM;

	oboff += OSCNPRINTF("Device name: %s\n", ccp->name);
	oboff += OSCNPRINTF(" RNG name: %s\n", ccp->rngname);
	oboff += OSCNPRINTF(" # Queues: %d\n", ccp->cmd_q_count);
	oboff += OSCNPRINTF(" # Cmds: %d\n", ccp->cmd_count);

	regval = ioread32(ccp->io_regs + CMD5_PSP_CCP_VERSION);
	oboff += OSCNPRINTF(" Version: %d\n", regval & RI_VERSION_NUM);
	oboff += OSCNPRINTF(" Engines:");
	if (regval & RI_AES_PRESENT)
	oboff += OSCNPRINTF(" AES");
	if (regval & RI_3DES_PRESENT)
	oboff += OSCNPRINTF(" 3DES");
	if (regval & RI_SHA_PRESENT)
	oboff += OSCNPRINTF(" SHA");
	if (regval & RI_RSA_PRESENT)
	oboff += OSCNPRINTF(" RSA");
	if (regval & RI_ECC_PRESENT)
	oboff += OSCNPRINTF(" ECC");
	if (regval & RI_ZDE_PRESENT)
	oboff += OSCNPRINTF(" ZDE");
	if (regval & RI_ZCE_PRESENT)
	oboff += OSCNPRINTF(" ZCE");
	if (regval & RI_TRNG_PRESENT)
	oboff += OSCNPRINTF(" TRNG");
	oboff += OSCNPRINTF("\n");
	oboff += OSCNPRINTF(" Queues: %d\n",
	(regval & RI_NUM_VQM) >> RI_NVQM_SHIFT);
	oboff += OSCNPRINTF("LSB Entries: %d\n",
	(regval & RI_LSB_ENTRIES) >> RI_NLSB_SHIFT);

	ret = simple_read_from_buffer(ubuf, count, offp, obuf, oboff);
	kfree(obuf);

	return ret;
	}

	/* Return a formatted buffer containing the current
	* statistics across all queues for a CCP.
	*/
	static ssize_t ccp5_debugfs_stats_read(struct file filp, char __user ubuf,
	size_t count, loff_t *offp)
	{
	struct ccp_device *ccp = filp->private_data;
	unsigned long total_xts_aes_ops = 0;
	unsigned long total_3des_ops = 0;
	unsigned long total_aes_ops = 0;
	unsigned long total_sha_ops = 0;
	unsigned long total_rsa_ops = 0;
	unsigned long total_ecc_ops = 0;
	unsigned long total_pt_ops = 0;
	unsigned long total_ops = 0;
	unsigned int oboff = 0;
	ssize_t ret = 0;
	unsigned int i;
	char *obuf;

	for (i = 0; i < ccp->cmd_q_count; i++) {
	struct ccp_cmd_queue *cmd_q = &ccp->cmd_q[i];

	total_ops += cmd_q->total_ops;
	total_aes_ops += cmd_q->total_aes_ops;
	total_xts_aes_ops += cmd_q->total_xts_aes_ops;
	total_3des_ops += cmd_q->total_3des_ops;
	total_sha_ops += cmd_q->total_sha_ops;
	total_rsa_ops += cmd_q->total_rsa_ops;
	total_pt_ops += cmd_q->total_pt_ops;
	total_ecc_ops += cmd_q->total_ecc_ops;
	}

	obuf = kmalloc(OBUFLEN, GFP_KERNEL);
	if (!obuf)
	return -ENOMEM;

	oboff += OSCNPRINTF("Total Interrupts Handled: %ld\n",
	ccp->total_interrupts);
	oboff += OSCNPRINTF(" Total Operations: %ld\n",
	total_ops);
	oboff += OSCNPRINTF(" AES: %ld\n",
	total_aes_ops);
	oboff += OSCNPRINTF(" XTS AES: %ld\n",
	total_xts_aes_ops);
	oboff += OSCNPRINTF(" SHA: %ld\n",
	total_3des_ops);
	oboff += OSCNPRINTF(" SHA: %ld\n",
	total_sha_ops);
	oboff += OSCNPRINTF(" RSA: %ld\n",
	total_rsa_ops);
	oboff += OSCNPRINTF(" Pass-Thru: %ld\n",
	total_pt_ops);
	oboff += OSCNPRINTF(" ECC: %ld\n",
	total_ecc_ops);

	ret = simple_read_from_buffer(ubuf, count, offp, obuf, oboff);
	kfree(obuf);

	return ret;
	}

	/* Reset the counters in a queue
	*/
	static void ccp5_debugfs_reset_queue_stats(struct ccp_cmd_queue *cmd_q)
	{
	cmd_q->total_ops = 0L;
	cmd_q->total_aes_ops = 0L;
	cmd_q->total_xts_aes_ops = 0L;
	cmd_q->total_3des_ops = 0L;
	cmd_q->total_sha_ops = 0L;
	cmd_q->total_rsa_ops = 0L;
	cmd_q->total_pt_ops = 0L;
	cmd_q->total_ecc_ops = 0L;
	}

	/* A value was written to the stats variable, which
	* should be used to reset the queue counters across
	* that device.
	*/
	static ssize_t ccp5_debugfs_stats_write(struct file *filp,
	const char __user *ubuf,
	size_t count, loff_t *offp)
	{
	struct ccp_device *ccp = filp->private_data;
	int i;

	for (i = 0; i < ccp->cmd_q_count; i++)
	ccp5_debugfs_reset_queue_stats(&ccp->cmd_q[i]);
	ccp->total_interrupts = 0L;

	return count;
	}

	/* Return a formatted buffer containing the current information
	* for that queue
	*/
	static ssize_t ccp5_debugfs_queue_read(struct file filp, char __user ubuf,
	size_t count, loff_t *offp)
	{
	struct ccp_cmd_queue *cmd_q = filp->private_data;
	unsigned int oboff = 0;
	unsigned int regval;
	ssize_t ret;
	char *obuf;

	if (!cmd_q)
	return 0;

	obuf = kmalloc(OBUFLEN, GFP_KERNEL);
	if (!obuf)
	return -ENOMEM;

	oboff += OSCNPRINTF(" Total Queue Operations: %ld\n",
	cmd_q->total_ops);
	oboff += OSCNPRINTF(" AES: %ld\n",
	cmd_q->total_aes_ops);
	oboff += OSCNPRINTF(" XTS AES: %ld\n",
	cmd_q->total_xts_aes_ops);
	oboff += OSCNPRINTF(" SHA: %ld\n",
	cmd_q->total_3des_ops);
	oboff += OSCNPRINTF(" SHA: %ld\n",
	cmd_q->total_sha_ops);
	oboff += OSCNPRINTF(" RSA: %ld\n",
	cmd_q->total_rsa_ops);
	oboff += OSCNPRINTF(" Pass-Thru: %ld\n",
	cmd_q->total_pt_ops);
	oboff += OSCNPRINTF(" ECC: %ld\n",
	cmd_q->total_ecc_ops);

	regval = ioread32(cmd_q->reg_int_enable);
	oboff += OSCNPRINTF(" Enabled Interrupts:");
	if (regval & INT_EMPTY_QUEUE)
	oboff += OSCNPRINTF(" EMPTY");
	if (regval & INT_QUEUE_STOPPED)
	oboff += OSCNPRINTF(" STOPPED");
	if (regval & INT_ERROR)
	oboff += OSCNPRINTF(" ERROR");
	if (regval & INT_COMPLETION)
	oboff += OSCNPRINTF(" COMPLETION");
	oboff += OSCNPRINTF("\n");

	ret = simple_read_from_buffer(ubuf, count, offp, obuf, oboff);
	kfree(obuf);

	return ret;
	}

	/* A value was written to the stats variable for a
	* queue. Reset the queue counters to this value.
	*/
	static ssize_t ccp5_debugfs_queue_write(struct file *filp,
	const char __user *ubuf,
	size_t count, loff_t *offp)
	{
	struct ccp_cmd_queue *cmd_q = filp->private_data;

	ccp5_debugfs_reset_queue_stats(cmd_q);

	return count;
	}

	static const struct file_operations ccp_debugfs_info_ops = {
	.owner = THIS_MODULE,
	.open = simple_open,
	.read = ccp5_debugfs_info_read,
	.write = NULL,
	};

	static const struct file_operations ccp_debugfs_queue_ops = {
	.owner = THIS_MODULE,
	.open = simple_open,
	.read = ccp5_debugfs_queue_read,
	.write = ccp5_debugfs_queue_write,
	};

	static const struct file_operations ccp_debugfs_stats_ops = {
	.owner = THIS_MODULE,
	.open = simple_open,
	.read = ccp5_debugfs_stats_read,
	.write = ccp5_debugfs_stats_write,
	};

	static struct dentry *ccp_debugfs_dir;
	static DEFINE_MUTEX(ccp_debugfs_lock);

	#define MAX_NAME_LEN 20

	void ccp5_debugfs_setup(struct ccp_device *ccp)
	{
	struct ccp_cmd_queue *cmd_q;
	char name[MAX_NAME_LEN + 1];
	struct dentry *debugfs_q_instance;
	int i;

	if (!debugfs_initialized())
	return;

	mutex_lock(&ccp_debugfs_lock);
	if (!ccp_debugfs_dir)
	ccp_debugfs_dir = debugfs_create_dir(KBUILD_MODNAME, NULL);
	mutex_unlock(&ccp_debugfs_lock);

	ccp->debugfs_instance = debugfs_create_dir(ccp->name, ccp_debugfs_dir);

	debugfs_create_file("info", 0400, ccp->debugfs_instance, ccp,
	&ccp_debugfs_info_ops);

	debugfs_create_file("stats", 0600, ccp->debugfs_instance, ccp,
	&ccp_debugfs_stats_ops);

	for (i = 0; i < ccp->cmd_q_count; i++) {
	cmd_q = &ccp->cmd_q[i];

	snprintf(name, MAX_NAME_LEN - 1, "q%d", cmd_q->id);

	debugfs_q_instance =
	debugfs_create_dir(name, ccp->debugfs_instance);

	debugfs_create_file("stats", 0600, debugfs_q_instance, cmd_q,
	&ccp_debugfs_queue_ops);
	}

	return;
	}

	void ccp5_debugfs_destroy(void)
	{
	debugfs_remove_recursive(ccp_debugfs_dir);
	}