287 lines
8.1 KiB
C
287 lines
8.1 KiB
C
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/*
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This file is provided under a dual BSD/GPLv2 license. When using or
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redistributing this file, you may do so under either license.
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GPL LICENSE SUMMARY
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Copyright(c) 2014 Intel Corporation.
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This program is free software; you can redistribute it and/or modify
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it under the terms of version 2 of the GNU General Public License as
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published by the Free Software Foundation.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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Contact Information:
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qat-linux@intel.com
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BSD LICENSE
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Copyright(c) 2014 Intel Corporation.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the
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distribution.
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* Neither the name of Intel Corporation nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <linux/module.h>
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#include <linux/slab.h>
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#include "adf_accel_devices.h"
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#include "adf_common_drv.h"
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#include "adf_transport.h"
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#include "adf_cfg.h"
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#include "adf_cfg_strings.h"
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#include "qat_crypto.h"
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#include "icp_qat_fw.h"
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#define SEC ADF_KERNEL_SEC
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static struct service_hndl qat_crypto;
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void qat_crypto_put_instance(struct qat_crypto_instance *inst)
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{
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if (atomic_sub_return(1, &inst->refctr) == 0)
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adf_dev_put(inst->accel_dev);
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}
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static int qat_crypto_free_instances(struct adf_accel_dev *accel_dev)
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{
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struct qat_crypto_instance *inst;
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struct list_head *list_ptr, *tmp;
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int i;
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list_for_each_safe(list_ptr, tmp, &accel_dev->crypto_list) {
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inst = list_entry(list_ptr, struct qat_crypto_instance, list);
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for (i = 0; i < atomic_read(&inst->refctr); i++)
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qat_crypto_put_instance(inst);
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if (inst->sym_tx)
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adf_remove_ring(inst->sym_tx);
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if (inst->sym_rx)
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adf_remove_ring(inst->sym_rx);
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if (inst->pke_tx)
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adf_remove_ring(inst->pke_tx);
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if (inst->pke_rx)
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adf_remove_ring(inst->pke_rx);
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if (inst->rnd_tx)
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adf_remove_ring(inst->rnd_tx);
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if (inst->rnd_rx)
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adf_remove_ring(inst->rnd_rx);
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list_del(list_ptr);
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kfree(inst);
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}
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return 0;
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}
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struct qat_crypto_instance *qat_crypto_get_instance_node(int node)
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{
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struct adf_accel_dev *accel_dev = NULL;
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struct qat_crypto_instance *inst_best = NULL;
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struct list_head *itr;
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unsigned long best = ~0;
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list_for_each(itr, adf_devmgr_get_head()) {
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accel_dev = list_entry(itr, struct adf_accel_dev, list);
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if ((node == dev_to_node(&GET_DEV(accel_dev)) ||
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dev_to_node(&GET_DEV(accel_dev)) < 0)
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&& adf_dev_started(accel_dev))
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break;
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accel_dev = NULL;
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}
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if (!accel_dev) {
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pr_err("QAT: Could not find device on node %d\n", node);
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accel_dev = adf_devmgr_get_first();
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}
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if (!accel_dev || !adf_dev_started(accel_dev))
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return NULL;
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list_for_each(itr, &accel_dev->crypto_list) {
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struct qat_crypto_instance *inst;
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unsigned long cur;
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inst = list_entry(itr, struct qat_crypto_instance, list);
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cur = atomic_read(&inst->refctr);
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if (best > cur) {
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inst_best = inst;
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best = cur;
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}
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}
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if (inst_best) {
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if (atomic_add_return(1, &inst_best->refctr) == 1) {
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if (adf_dev_get(accel_dev)) {
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atomic_dec(&inst_best->refctr);
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pr_err("QAT: Could increment dev refctr\n");
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return NULL;
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}
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}
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}
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return inst_best;
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}
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static int qat_crypto_create_instances(struct adf_accel_dev *accel_dev)
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{
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int i;
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unsigned long bank;
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unsigned long num_inst, num_msg_sym, num_msg_asym;
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int msg_size;
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struct qat_crypto_instance *inst;
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char key[ADF_CFG_MAX_KEY_LEN_IN_BYTES];
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char val[ADF_CFG_MAX_VAL_LEN_IN_BYTES];
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INIT_LIST_HEAD(&accel_dev->crypto_list);
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strlcpy(key, ADF_NUM_CY, sizeof(key));
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if (adf_cfg_get_param_value(accel_dev, SEC, key, val))
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return -EFAULT;
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if (kstrtoul(val, 0, &num_inst))
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return -EFAULT;
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for (i = 0; i < num_inst; i++) {
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inst = kzalloc_node(sizeof(*inst), GFP_KERNEL,
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dev_to_node(&GET_DEV(accel_dev)));
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if (!inst)
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goto err;
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list_add_tail(&inst->list, &accel_dev->crypto_list);
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inst->id = i;
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atomic_set(&inst->refctr, 0);
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inst->accel_dev = accel_dev;
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snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_BANK_NUM, i);
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if (adf_cfg_get_param_value(accel_dev, SEC, key, val))
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goto err;
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if (kstrtoul(val, 10, &bank))
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goto err;
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snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_SYM_SIZE, i);
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if (adf_cfg_get_param_value(accel_dev, SEC, key, val))
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goto err;
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if (kstrtoul(val, 10, &num_msg_sym))
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goto err;
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num_msg_sym = num_msg_sym >> 1;
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snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_ASYM_SIZE, i);
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if (adf_cfg_get_param_value(accel_dev, SEC, key, val))
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goto err;
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if (kstrtoul(val, 10, &num_msg_asym))
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goto err;
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num_msg_asym = num_msg_asym >> 1;
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msg_size = ICP_QAT_FW_REQ_DEFAULT_SZ;
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snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_SYM_TX, i);
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if (adf_create_ring(accel_dev, SEC, bank, num_msg_sym,
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msg_size, key, NULL, 0, &inst->sym_tx))
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goto err;
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snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_RND_TX, i);
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if (adf_create_ring(accel_dev, SEC, bank, num_msg_asym,
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msg_size, key, NULL, 0, &inst->rnd_tx))
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goto err;
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msg_size = msg_size >> 1;
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snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_ASYM_TX, i);
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if (adf_create_ring(accel_dev, SEC, bank, num_msg_asym,
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msg_size, key, NULL, 0, &inst->pke_tx))
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goto err;
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msg_size = ICP_QAT_FW_RESP_DEFAULT_SZ;
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snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_SYM_RX, i);
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if (adf_create_ring(accel_dev, SEC, bank, num_msg_sym,
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msg_size, key, qat_alg_callback, 0,
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&inst->sym_rx))
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goto err;
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snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_RND_RX, i);
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if (adf_create_ring(accel_dev, SEC, bank, num_msg_asym,
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msg_size, key, qat_alg_callback, 0,
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&inst->rnd_rx))
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goto err;
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snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_ASYM_RX, i);
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if (adf_create_ring(accel_dev, SEC, bank, num_msg_asym,
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msg_size, key, qat_alg_callback, 0,
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&inst->pke_rx))
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goto err;
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}
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return 0;
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err:
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qat_crypto_free_instances(accel_dev);
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return -ENOMEM;
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}
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static int qat_crypto_init(struct adf_accel_dev *accel_dev)
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{
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if (qat_crypto_create_instances(accel_dev))
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return -EFAULT;
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return 0;
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}
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static int qat_crypto_shutdown(struct adf_accel_dev *accel_dev)
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{
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return qat_crypto_free_instances(accel_dev);
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}
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static int qat_crypto_event_handler(struct adf_accel_dev *accel_dev,
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enum adf_event event)
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{
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int ret;
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switch (event) {
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case ADF_EVENT_INIT:
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ret = qat_crypto_init(accel_dev);
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break;
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case ADF_EVENT_SHUTDOWN:
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ret = qat_crypto_shutdown(accel_dev);
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break;
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case ADF_EVENT_RESTARTING:
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case ADF_EVENT_RESTARTED:
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case ADF_EVENT_START:
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case ADF_EVENT_STOP:
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default:
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ret = 0;
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}
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return ret;
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}
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int qat_crypto_register(void)
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{
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memset(&qat_crypto, 0, sizeof(qat_crypto));
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qat_crypto.event_hld = qat_crypto_event_handler;
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qat_crypto.name = "qat_crypto";
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return adf_service_register(&qat_crypto);
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}
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int qat_crypto_unregister(void)
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{
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return adf_service_unregister(&qat_crypto);
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}
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