crypto: qat - Intel(R) QAT crypto interface

This patch adds qat crypto interface.
Acked-by: John Griffin <john.griffin@intel.com>
Reviewed-by: Bruce W. Allan <bruce.w.allan@intel.com>
Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/qat/qat_common/qat_crypto.c

+/*
+  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

+/*
+  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