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Commit d370cec3 authored by Tadeusz Struk's avatar Tadeusz Struk Committed by Herbert Xu
Browse files

crypto: qat - Intel(R) QAT crypto interface 



This patch adds qat crypto interface.

Acked-by: default avatarJohn Griffin <john.griffin@intel.com>
Reviewed-by: default avatarBruce W. Allan <bruce.w.allan@intel.com>
Signed-off-by: default avatarTadeusz Struk <tadeusz.struk@intel.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 38154e65

drivers/crypto/qat/qat_common/qat_algs.c

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File added.

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drivers/crypto/qat/qat_common/qat_crypto.c

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Original line number Diff line number Diff line 
/*

  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/module.h>

#include <linux/slab.h>

#include "adf_accel_devices.h"

#include "adf_common_drv.h"

#include "adf_transport.h"

#include "adf_cfg.h"

#include "adf_cfg_strings.h"

#include "qat_crypto.h"

#include "icp_qat_fw.h"



#define SEC ADF_KERNEL_SEC



static struct service_hndl qat_crypto;



void qat_crypto_put_instance(struct qat_crypto_instance *inst)

{

	if (atomic_sub_return(1, &inst->refctr) == 0)

		adf_dev_put(inst->accel_dev);

}



static int qat_crypto_free_instances(struct adf_accel_dev *accel_dev)

{

	struct qat_crypto_instance *inst;

	struct list_head *list_ptr, *tmp;

	int i;



	list_for_each_safe(list_ptr, tmp, &accel_dev->crypto_list) {

		inst = list_entry(list_ptr, struct qat_crypto_instance, list);



		for (i = 0; i < atomic_read(&inst->refctr); i++)

			qat_crypto_put_instance(inst);



		if (inst->sym_tx)

			adf_remove_ring(inst->sym_tx);



		if (inst->sym_rx)

			adf_remove_ring(inst->sym_rx);



		if (inst->pke_tx)

			adf_remove_ring(inst->pke_tx);



		if (inst->pke_rx)

			adf_remove_ring(inst->pke_rx);



		if (inst->rnd_tx)

			adf_remove_ring(inst->rnd_tx);



		if (inst->rnd_rx)

			adf_remove_ring(inst->rnd_rx);



		list_del(list_ptr);

		kfree(inst);

	}

	return 0;

}



struct qat_crypto_instance *qat_crypto_get_instance_node(int node)

{

	struct adf_accel_dev *accel_dev = NULL;

	struct qat_crypto_instance *inst_best = NULL;

	struct list_head *itr;

	unsigned long best = ~0;



	list_for_each(itr, adf_devmgr_get_head()) {

		accel_dev = list_entry(itr, struct adf_accel_dev, list);

		if (accel_dev->numa_node == node && adf_dev_started(accel_dev))

			break;

		accel_dev = NULL;

	}

	if (!accel_dev) {

		pr_err("QAT: Could not find device on give node\n");

		accel_dev = adf_devmgr_get_first();

	}

	if (!accel_dev || !adf_dev_started(accel_dev))

		return NULL;



	list_for_each(itr, &accel_dev->crypto_list) {

		struct qat_crypto_instance *inst;

		unsigned long cur;



		inst = list_entry(itr, struct qat_crypto_instance, list);

		cur = atomic_read(&inst->refctr);

		if (best > cur) {

			inst_best = inst;

			best = cur;

		}

	}

	if (inst_best) {

		if (atomic_add_return(1, &inst_best->refctr) == 1) {

			if (adf_dev_get(accel_dev)) {

				atomic_dec(&inst_best->refctr);

				pr_err("QAT: Could increment dev refctr\n");

				return NULL;

			}

		}

	}

	return inst_best;

}



static int qat_crypto_create_instances(struct adf_accel_dev *accel_dev)

{

	int i;

	long unsigned int bank;

	long unsigned int num_inst, num_msg_sym, num_msg_asym;

	int msg_size;

	struct qat_crypto_instance *inst;

	char key[ADF_CFG_MAX_KEY_LEN_IN_BYTES];

	char val[ADF_CFG_MAX_VAL_LEN_IN_BYTES];



	INIT_LIST_HEAD(&accel_dev->crypto_list);

	strlcpy(key, ADF_NUM_CY, sizeof(key));



	if (adf_cfg_get_param_value(accel_dev, SEC, key, val))

		return -EFAULT;



	if (kstrtoul(val, 0, &num_inst))

		return -EFAULT;



	for (i = 0; i < num_inst; i++) {

		inst = kzalloc_node(sizeof(*inst), GFP_KERNEL,

				    accel_dev->numa_node);

		if (!inst)

			goto err;



		list_add_tail(&inst->list, &accel_dev->crypto_list);

		inst->id = i;

		atomic_set(&inst->refctr, 0);

		inst->accel_dev = accel_dev;

		snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_BANK_NUM, i);

		if (adf_cfg_get_param_value(accel_dev, SEC, key, val))

			goto err;



		if (kstrtoul(val, 10, &bank))

			goto err;

		snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_SYM_SIZE, i);

		if (adf_cfg_get_param_value(accel_dev, SEC, key, val))

			goto err;



		if (kstrtoul(val, 10, &num_msg_sym))

			goto err;

		num_msg_sym = num_msg_sym >> 1;

		snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_ASYM_SIZE, i);

		if (adf_cfg_get_param_value(accel_dev, SEC, key, val))

			goto err;



		if (kstrtoul(val, 10, &num_msg_asym))

			goto err;

		num_msg_asym = num_msg_asym >> 1;



		msg_size = ICP_QAT_FW_REQ_DEFAULT_SZ;

		snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_SYM_TX, i);

		if (adf_create_ring(accel_dev, SEC, bank, num_msg_sym,

				    msg_size, key, NULL, 0, &inst->sym_tx))

			goto err;



		snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_RND_TX, i);

		if (adf_create_ring(accel_dev, SEC, bank, num_msg_asym,

				    msg_size, key, NULL, 0, &inst->rnd_tx))

			goto err;



		msg_size = msg_size >> 1;

		snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_ASYM_TX, i);

		if (adf_create_ring(accel_dev, SEC, bank, num_msg_asym,

				    msg_size, key, NULL, 0, &inst->pke_tx))

			goto err;



		msg_size = ICP_QAT_FW_RESP_DEFAULT_SZ;

		snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_SYM_RX, i);

		if (adf_create_ring(accel_dev, SEC, bank, num_msg_sym,

				    msg_size, key, qat_alg_callback, 0,

				    &inst->sym_rx))

			goto err;



		snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_RND_RX, i);

		if (adf_create_ring(accel_dev, SEC, bank, num_msg_asym,

				    msg_size, key, qat_alg_callback, 0,

				    &inst->rnd_rx))

			goto err;



		snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_ASYM_RX, i);

		if (adf_create_ring(accel_dev, SEC, bank, num_msg_asym,

				    msg_size, key, qat_alg_callback, 0,

				    &inst->pke_rx))

			goto err;

	}

	return 0;

err:

	qat_crypto_free_instances(accel_dev);

	return -ENOMEM;

}



static int qat_crypto_init(struct adf_accel_dev *accel_dev)

{

	if (qat_crypto_create_instances(accel_dev))

		return -EFAULT;



	return 0;

}



static int qat_crypto_shutdown(struct adf_accel_dev *accel_dev)

{

	return qat_crypto_free_instances(accel_dev);

}



static int qat_crypto_event_handler(struct adf_accel_dev *accel_dev,

				    enum adf_event event)

{

	int ret;



	switch (event) {

	case ADF_EVENT_INIT:

		ret = qat_crypto_init(accel_dev);

		break;

	case ADF_EVENT_SHUTDOWN:

		ret = qat_crypto_shutdown(accel_dev);

		break;

	case ADF_EVENT_RESTARTING:

	case ADF_EVENT_RESTARTED:

	case ADF_EVENT_START:

	case ADF_EVENT_STOP:

	default:

		ret = 0;

	}

	return ret;

}



int qat_crypto_register(void)

{

	memset(&qat_crypto, 0, sizeof(qat_crypto));

	qat_crypto.event_hld = qat_crypto_event_handler;

	qat_crypto.name = "qat_crypto";

	return adf_service_register(&qat_crypto);

}



int qat_crypto_unregister(void)

{

	return adf_service_unregister(&qat_crypto);

}

drivers/crypto/qat/qat_common/qat_crypto.h

0 → 100644
+83 −0
Original line number Diff line number Diff line 
/*

  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.

*/

#ifndef _QAT_CRYPTO_INSTANCE_H_

#define _QAT_CRYPTO_INSTANCE_H_



#include <linux/list.h>

#include <linux/slab.h>

#include "adf_accel_devices.h"

#include "icp_qat_fw_la.h"



struct qat_crypto_instance {

	struct adf_etr_ring_data *sym_tx;

	struct adf_etr_ring_data *sym_rx;

	struct adf_etr_ring_data *pke_tx;

	struct adf_etr_ring_data *pke_rx;

	struct adf_etr_ring_data *rnd_tx;

	struct adf_etr_ring_data *rnd_rx;

	struct adf_accel_dev *accel_dev;

	struct list_head list;

	unsigned long state;

	int id;

	atomic_t refctr;

};



struct qat_crypto_request_buffs {

	struct qat_alg_buf_list *bl;

	dma_addr_t blp;

	struct qat_alg_buf_list *blout;

	dma_addr_t bloutp;

	size_t sz;

};



struct qat_crypto_request {

	struct icp_qat_fw_la_bulk_req req;

	struct qat_alg_session_ctx *ctx;

	struct aead_request *areq;

	struct qat_crypto_request_buffs buf;

};

#endif