drivers/crypto/qat/qat_common/adf_transport_debug.c - kernel/bruno - Git at Google

 /*
   This file is provided under a dual BSD/GPLv2 license.  When using or
   redistributing this file, you may do so under either license.

   GPL LICENSE SUMMARY
   Copyright(c) 2014 Intel Corporation.
   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.

   Contact Information:
   qat-linux@intel.com

   BSD LICENSE
   Copyright(c) 2014 Intel Corporation.
   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions
   are met:

     * Redistributions of source code must retain the above copyright
       notice, this list of conditions and the following disclaimer.
     * Redistributions in binary form must reproduce the above copyright
       notice, this list of conditions and the following disclaimer in
       the documentation and/or other materials provided with the
       distribution.
     * Neither the name of Intel Corporation nor the names of its
       contributors may be used to endorse or promote products derived
       from this software without specific prior written permission.

   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 #include <linux/mutex.h>
 #include <linux/slab.h>
 #include <linux/seq_file.h>
 #include "adf_accel_devices.h"
 #include "adf_transport_internal.h"
 #include "adf_transport_access_macros.h"

 static DEFINE_MUTEX(ring_read_lock);
 static DEFINE_MUTEX(bank_read_lock);

 static void *adf_ring_start(struct seq_file *sfile, loff_t *pos)
 {
 	struct adf_etr_ring_data *ring = sfile->private;

 	mutex_lock(&ring_read_lock);
 	if (*pos == 0)
 		return SEQ_START_TOKEN;

 	if (*pos >= (ADF_SIZE_TO_RING_SIZE_IN_BYTES(ring->ring_size) /
 		     ADF_MSG_SIZE_TO_BYTES(ring->msg_size)))
 		return NULL;

 	return ring->base_addr +
 		(ADF_MSG_SIZE_TO_BYTES(ring->msg_size) * (*pos)++);
 }

 static void *adf_ring_next(struct seq_file *sfile, void *v, loff_t *pos)
 {
 	struct adf_etr_ring_data *ring = sfile->private;

 	if (*pos >= (ADF_SIZE_TO_RING_SIZE_IN_BYTES(ring->ring_size) /
 		     ADF_MSG_SIZE_TO_BYTES(ring->msg_size)))
 		return NULL;

 	return ring->base_addr +
 		(ADF_MSG_SIZE_TO_BYTES(ring->msg_size) * (*pos)++);
 }

 static int adf_ring_show(struct seq_file *sfile, void *v)
 {
 	struct adf_etr_ring_data *ring = sfile->private;
 	struct adf_etr_bank_data *bank = ring->bank;
 	uint32_t *msg = v;
 	void __iomem *csr = ring->bank->csr_addr;
 	int i, x;

 	if (v == SEQ_START_TOKEN) {
 		int head, tail, empty;

 		head = READ_CSR_RING_HEAD(csr, bank->bank_number,
 					  ring->ring_number);
 		tail = READ_CSR_RING_TAIL(csr, bank->bank_number,
 					  ring->ring_number);
 		empty = READ_CSR_E_STAT(csr, bank->bank_number);

 		seq_puts(sfile, "------- Ring configuration -------\n");
 		seq_printf(sfile, "ring num %d, bank num %d\n",
 			   ring->ring_number, ring->bank->bank_number);
 		seq_printf(sfile, "head %x, tail %x, empty: %d\n",
 			   head, tail, (empty & 1 << ring->ring_number)
 			   >> ring->ring_number);
 		seq_printf(sfile, "ring size %d, msg size %d\n",
 			   ADF_SIZE_TO_RING_SIZE_IN_BYTES(ring->ring_size),
 			   ADF_MSG_SIZE_TO_BYTES(ring->msg_size));
 		seq_puts(sfile, "----------- Ring data ------------\n");
 		return 0;
 	}
 	seq_printf(sfile, "%p:", msg);
 	x = 0;
 	i = 0;
 	for (; i < (ADF_MSG_SIZE_TO_BYTES(ring->msg_size) >> 2); i++) {
 		seq_printf(sfile, " %08X", *(msg + i));
 		if ((ADF_MSG_SIZE_TO_BYTES(ring->msg_size) >> 2) != i + 1 &&
 		    (++x == 8)) {
 			seq_printf(sfile, "\n%p:", msg + i + 1);
 			x = 0;
 		}
 	}
 	seq_puts(sfile, "\n");
 	return 0;
 }

 static void adf_ring_stop(struct seq_file *sfile, void *v)
 {
 	mutex_unlock(&ring_read_lock);
 }

 static const struct seq_operations adf_ring_sops = {
 	.start = adf_ring_start,
 	.next = adf_ring_next,
 	.stop = adf_ring_stop,
 	.show = adf_ring_show
 };

 static int adf_ring_open(struct inode *inode, struct file *file)
 {
 	int ret = seq_open(file, &adf_ring_sops);

 	if (!ret) {
 		struct seq_file *seq_f = file->private_data;

 		seq_f->private = inode->i_private;
 	}
 	return ret;
 }

 static const struct file_operations adf_ring_debug_fops = {
 	.open = adf_ring_open,
 	.read = seq_read,
 	.llseek = seq_lseek,
 	.release = seq_release
 };

 int adf_ring_debugfs_add(struct adf_etr_ring_data *ring, const char *name)
 {
 	struct adf_etr_ring_debug_entry *ring_debug;
 	char entry_name[8];

 	ring_debug = kzalloc(sizeof(*ring_debug), GFP_KERNEL);
 	if (!ring_debug)
 		return -ENOMEM;

 	strlcpy(ring_debug->ring_name, name, sizeof(ring_debug->ring_name));
 	snprintf(entry_name, sizeof(entry_name), "ring_%02d",
 		 ring->ring_number);

 	ring_debug->debug = debugfs_create_file(entry_name, S_IRUSR,
 						ring->bank->bank_debug_dir,
 						ring, &adf_ring_debug_fops);
 	if (!ring_debug->debug) {
 		pr_err("QAT: Failed to create ring debug entry.\n");
 		kfree(ring_debug);
 		return -EFAULT;
 	}
 	ring->ring_debug = ring_debug;
 	return 0;
 }

 void adf_ring_debugfs_rm(struct adf_etr_ring_data *ring)
 {
 	if (ring->ring_debug) {
 		debugfs_remove(ring->ring_debug->debug);
 		kfree(ring->ring_debug);
 		ring->ring_debug = NULL;
 	}
 }

 static void *adf_bank_start(struct seq_file *sfile, loff_t *pos)
 {
 	mutex_lock(&bank_read_lock);
 	if (*pos == 0)
 		return SEQ_START_TOKEN;

 	if (*pos >= ADF_ETR_MAX_RINGS_PER_BANK)
 		return NULL;

 	return pos;
 }

 static void *adf_bank_next(struct seq_file *sfile, void *v, loff_t *pos)
 {
 	if (++(*pos) >= ADF_ETR_MAX_RINGS_PER_BANK)
 		return NULL;

 	return pos;
 }

 static int adf_bank_show(struct seq_file *sfile, void *v)
 {
 	struct adf_etr_bank_data *bank = sfile->private;

 	if (v == SEQ_START_TOKEN) {
 		seq_printf(sfile, "------- Bank %d configuration -------\n",
 			   bank->bank_number);
 	} else {
 		int ring_id = *((int *)v) - 1;
 		struct adf_etr_ring_data *ring = &bank->rings[ring_id];
 		void __iomem *csr = bank->csr_addr;
 		int head, tail, empty;

 		if (!(bank->ring_mask & 1 << ring_id))
 			return 0;

 		head = READ_CSR_RING_HEAD(csr, bank->bank_number,
 					  ring->ring_number);
 		tail = READ_CSR_RING_TAIL(csr, bank->bank_number,
 					  ring->ring_number);
 		empty = READ_CSR_E_STAT(csr, bank->bank_number);

 		seq_printf(sfile,
 			   "ring num %02d, head %04x, tail %04x, empty: %d\n",
 			   ring->ring_number, head, tail,
 			   (empty & 1 << ring->ring_number) >>
 			   ring->ring_number);
 	}
 	return 0;
 }

 static void adf_bank_stop(struct seq_file *sfile, void *v)
 {
 	mutex_unlock(&bank_read_lock);
 }

 static const struct seq_operations adf_bank_sops = {
 	.start = adf_bank_start,
 	.next = adf_bank_next,
 	.stop = adf_bank_stop,
 	.show = adf_bank_show
 };

 static int adf_bank_open(struct inode *inode, struct file *file)
 {
 	int ret = seq_open(file, &adf_bank_sops);

 	if (!ret) {
 		struct seq_file *seq_f = file->private_data;

 		seq_f->private = inode->i_private;
 	}
 	return ret;
 }

 static const struct file_operations adf_bank_debug_fops = {
 	.open = adf_bank_open,
 	.read = seq_read,
 	.llseek = seq_lseek,
 	.release = seq_release
 };

 int adf_bank_debugfs_add(struct adf_etr_bank_data *bank)
 {
 	struct adf_accel_dev *accel_dev = bank->accel_dev;
 	struct dentry *parent = accel_dev->transport->debug;
 	char name[8];

 	snprintf(name, sizeof(name), "bank_%02d", bank->bank_number);
 	bank->bank_debug_dir = debugfs_create_dir(name, parent);
 	if (!bank->bank_debug_dir) {
 		pr_err("QAT: Failed to create bank debug dir.\n");
 		return -EFAULT;
 	}

 	bank->bank_debug_cfg = debugfs_create_file("config", S_IRUSR,
 						   bank->bank_debug_dir, bank,
 						   &adf_bank_debug_fops);
 	if (!bank->bank_debug_cfg) {
 		pr_err("QAT: Failed to create bank debug entry.\n");
 		debugfs_remove(bank->bank_debug_dir);
 		return -EFAULT;
 	}
 	return 0;
 }

 void adf_bank_debugfs_rm(struct adf_etr_bank_data *bank)
 {
 	debugfs_remove(bank->bank_debug_cfg);
 	debugfs_remove(bank->bank_debug_dir);
 }
	/*
	This file is provided under a dual BSD/GPLv2 license. When using or
	redistributing this file, you may do so under either license.

	GPL LICENSE SUMMARY
	Copyright(c) 2014 Intel Corporation.
	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.

	Contact Information:
	qat-linux@intel.com

	BSD LICENSE
	Copyright(c) 2014 Intel Corporation.
	Redistribution and use in source and binary forms, with or without
	modification, are permitted provided that the following conditions
	are met:

	* Redistributions of source code must retain the above copyright
	notice, this list of conditions and the following disclaimer.
	* Redistributions in binary form must reproduce the above copyright
	notice, this list of conditions and the following disclaimer in
	the documentation and/or other materials provided with the
	distribution.
	* Neither the name of Intel Corporation nor the names of its
	contributors may be used to endorse or promote products derived
	from this software without specific prior written permission.

	THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/
	#include <linux/mutex.h>
	#include <linux/slab.h>
	#include <linux/seq_file.h>
	#include "adf_accel_devices.h"
	#include "adf_transport_internal.h"
	#include "adf_transport_access_macros.h"

	static DEFINE_MUTEX(ring_read_lock);
	static DEFINE_MUTEX(bank_read_lock);

	static void adf_ring_start(struct seq_file sfile, loff_t *pos)
	{
	struct adf_etr_ring_data *ring = sfile->private;

	mutex_lock(&ring_read_lock);
	if (*pos == 0)
	return SEQ_START_TOKEN;

	if (*pos >= (ADF_SIZE_TO_RING_SIZE_IN_BYTES(ring->ring_size) /
	ADF_MSG_SIZE_TO_BYTES(ring->msg_size)))
	return NULL;

	return ring->base_addr +
	(ADF_MSG_SIZE_TO_BYTES(ring->msg_size) * (*pos)++);
	}

	static void adf_ring_next(struct seq_file sfile, void v, loff_t pos)
	{
	struct adf_etr_ring_data *ring = sfile->private;

	if (*pos >= (ADF_SIZE_TO_RING_SIZE_IN_BYTES(ring->ring_size) /
	ADF_MSG_SIZE_TO_BYTES(ring->msg_size)))
	return NULL;

	return ring->base_addr +
	(ADF_MSG_SIZE_TO_BYTES(ring->msg_size) * (*pos)++);
	}

	static int adf_ring_show(struct seq_file sfile, void v)
	{
	struct adf_etr_ring_data *ring = sfile->private;
	struct adf_etr_bank_data *bank = ring->bank;
	uint32_t *msg = v;
	void __iomem *csr = ring->bank->csr_addr;
	int i, x;

	if (v == SEQ_START_TOKEN) {
	int head, tail, empty;

	head = READ_CSR_RING_HEAD(csr, bank->bank_number,
	ring->ring_number);
	tail = READ_CSR_RING_TAIL(csr, bank->bank_number,
	ring->ring_number);
	empty = READ_CSR_E_STAT(csr, bank->bank_number);

	seq_puts(sfile, "------- Ring configuration -------\n");
	seq_printf(sfile, "ring num %d, bank num %d\n",
	ring->ring_number, ring->bank->bank_number);
	seq_printf(sfile, "head %x, tail %x, empty: %d\n",
	head, tail, (empty & 1 << ring->ring_number)
	>> ring->ring_number);
	seq_printf(sfile, "ring size %d, msg size %d\n",
	ADF_SIZE_TO_RING_SIZE_IN_BYTES(ring->ring_size),
	ADF_MSG_SIZE_TO_BYTES(ring->msg_size));
	seq_puts(sfile, "----------- Ring data ------------\n");
	return 0;
	}
	seq_printf(sfile, "%p:", msg);
	x = 0;
	i = 0;
	for (; i < (ADF_MSG_SIZE_TO_BYTES(ring->msg_size) >> 2); i++) {
	seq_printf(sfile, " %08X", *(msg + i));
	if ((ADF_MSG_SIZE_TO_BYTES(ring->msg_size) >> 2) != i + 1 &&
	(++x == 8)) {
	seq_printf(sfile, "\n%p:", msg + i + 1);
	x = 0;
	}
	}
	seq_puts(sfile, "\n");
	return 0;
	}

	static void adf_ring_stop(struct seq_file sfile, void v)
	{
	mutex_unlock(&ring_read_lock);
	}

	static const struct seq_operations adf_ring_sops = {
	.start = adf_ring_start,
	.next = adf_ring_next,
	.stop = adf_ring_stop,
	.show = adf_ring_show
	};

	static int adf_ring_open(struct inode inode, struct file file)
	{
	int ret = seq_open(file, &adf_ring_sops);

	if (!ret) {
	struct seq_file *seq_f = file->private_data;

	seq_f->private = inode->i_private;
	}
	return ret;
	}

	static const struct file_operations adf_ring_debug_fops = {
	.open = adf_ring_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = seq_release
	};

	int adf_ring_debugfs_add(struct adf_etr_ring_data ring, const char name)
	{
	struct adf_etr_ring_debug_entry *ring_debug;
	char entry_name[8];

	ring_debug = kzalloc(sizeof(*ring_debug), GFP_KERNEL);
	if (!ring_debug)
	return -ENOMEM;

	strlcpy(ring_debug->ring_name, name, sizeof(ring_debug->ring_name));
	snprintf(entry_name, sizeof(entry_name), "ring_%02d",
	ring->ring_number);

	ring_debug->debug = debugfs_create_file(entry_name, S_IRUSR,
	ring->bank->bank_debug_dir,
	ring, &adf_ring_debug_fops);
	if (!ring_debug->debug) {
	pr_err("QAT: Failed to create ring debug entry.\n");
	kfree(ring_debug);
	return -EFAULT;
	}
	ring->ring_debug = ring_debug;
	return 0;
	}

	void adf_ring_debugfs_rm(struct adf_etr_ring_data *ring)
	{
	if (ring->ring_debug) {
	debugfs_remove(ring->ring_debug->debug);
	kfree(ring->ring_debug);
	ring->ring_debug = NULL;
	}
	}

	static void adf_bank_start(struct seq_file sfile, loff_t *pos)
	{
	mutex_lock(&bank_read_lock);
	if (*pos == 0)
	return SEQ_START_TOKEN;

	if (*pos >= ADF_ETR_MAX_RINGS_PER_BANK)
	return NULL;

	return pos;
	}

	static void adf_bank_next(struct seq_file sfile, void v, loff_t pos)
	{
	if (++(*pos) >= ADF_ETR_MAX_RINGS_PER_BANK)
	return NULL;

	return pos;
	}

	static int adf_bank_show(struct seq_file sfile, void v)
	{
	struct adf_etr_bank_data *bank = sfile->private;

	if (v == SEQ_START_TOKEN) {
	seq_printf(sfile, "------- Bank %d configuration -------\n",
	bank->bank_number);
	} else {
	int ring_id = ((int )v) - 1;
	struct adf_etr_ring_data *ring = &bank->rings[ring_id];
	void __iomem *csr = bank->csr_addr;
	int head, tail, empty;

	if (!(bank->ring_mask & 1 << ring_id))
	return 0;

	head = READ_CSR_RING_HEAD(csr, bank->bank_number,
	ring->ring_number);
	tail = READ_CSR_RING_TAIL(csr, bank->bank_number,
	ring->ring_number);
	empty = READ_CSR_E_STAT(csr, bank->bank_number);

	seq_printf(sfile,
	"ring num %02d, head %04x, tail %04x, empty: %d\n",
	ring->ring_number, head, tail,
	(empty & 1 << ring->ring_number) >>
	ring->ring_number);
	}
	return 0;
	}

	static void adf_bank_stop(struct seq_file sfile, void v)
	{
	mutex_unlock(&bank_read_lock);
	}

	static const struct seq_operations adf_bank_sops = {
	.start = adf_bank_start,
	.next = adf_bank_next,
	.stop = adf_bank_stop,
	.show = adf_bank_show
	};

	static int adf_bank_open(struct inode inode, struct file file)
	{
	int ret = seq_open(file, &adf_bank_sops);

	if (!ret) {
	struct seq_file *seq_f = file->private_data;

	seq_f->private = inode->i_private;
	}
	return ret;
	}

	static const struct file_operations adf_bank_debug_fops = {
	.open = adf_bank_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = seq_release
	};

	int adf_bank_debugfs_add(struct adf_etr_bank_data *bank)
	{
	struct adf_accel_dev *accel_dev = bank->accel_dev;
	struct dentry *parent = accel_dev->transport->debug;
	char name[8];

	snprintf(name, sizeof(name), "bank_%02d", bank->bank_number);
	bank->bank_debug_dir = debugfs_create_dir(name, parent);
	if (!bank->bank_debug_dir) {
	pr_err("QAT: Failed to create bank debug dir.\n");
	return -EFAULT;
	}

	bank->bank_debug_cfg = debugfs_create_file("config", S_IRUSR,
	bank->bank_debug_dir, bank,
	&adf_bank_debug_fops);
	if (!bank->bank_debug_cfg) {
	pr_err("QAT: Failed to create bank debug entry.\n");
	debugfs_remove(bank->bank_debug_dir);
	return -EFAULT;
	}
	return 0;
	}

	void adf_bank_debugfs_rm(struct adf_etr_bank_data *bank)
	{
	debugfs_remove(bank->bank_debug_cfg);
	debugfs_remove(bank->bank_debug_dir);
	}