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c5552ad039
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@21952 3c298f89-4303-0410-b956-a3cf2f4a3e73
774 lines
26 KiB
C
774 lines
26 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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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2007,2008,2009 Intel Corporation. All rights reserved.
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*
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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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*
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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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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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* The full GNU General Public License is included in this distribution
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* in the file called LICENSE.GPL.
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*
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* Contact Information:
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* Intel Corporation
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*
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* BSD LICENSE
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*
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* Copyright(c) 2007,2008,2009 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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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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*
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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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*
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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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*
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* version: Security.L.1.0.2-229
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*
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***************************************************************************/
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/*
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* An OCF module that uses Intel® QuickAssist Integrated Accelerator to do the
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* crypto.
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*
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* This driver requires the ICP Access Library that is available from Intel in
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* order to operate.
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*/
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#include "icp_ocf.h"
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#define ICP_OCF_COMP_NAME "ICP_OCF"
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#define ICP_OCF_VER_MAIN (2)
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#define ICP_OCF_VER_MJR (1)
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#define ICP_OCF_VER_MNR (0)
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#define MAX_DEREG_RETRIES (100)
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#define DEFAULT_DEREG_RETRIES (10)
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#define DEFAULT_DEREG_DELAY_IN_JIFFIES (10)
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/* This defines the maximum number of sessions possible between OCF
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and the OCF EP80579 Driver. If set to zero, there is no limit. */
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#define DEFAULT_OCF_TO_DRV_MAX_SESSION_COUNT (0)
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#define NUM_SUPPORTED_CAPABILITIES (21)
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/*Slab zone names*/
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#define ICP_SESSION_DATA_NAME "icp_ocf.SesDat"
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#define ICP_OP_DATA_NAME "icp_ocf.OpDat"
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#define ICP_DH_NAME "icp_ocf.DH"
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#define ICP_MODEXP_NAME "icp_ocf.ModExp"
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#define ICP_RSA_DECRYPT_NAME "icp_ocf.RSAdec"
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#define ICP_RSA_PKEY_NAME "icp_ocf.RSApk"
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#define ICP_DSA_SIGN_NAME "icp_ocf.DSAsg"
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#define ICP_DSA_VER_NAME "icp_ocf.DSAver"
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#define ICP_RAND_VAL_NAME "icp_ocf.DSArnd"
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#define ICP_FLAT_BUFF_NAME "icp_ocf.FB"
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/*Slabs zones*/
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icp_kmem_cache drvSessionData_zone = NULL;
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icp_kmem_cache drvOpData_zone = NULL;
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icp_kmem_cache drvDH_zone = NULL;
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icp_kmem_cache drvLnModExp_zone = NULL;
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icp_kmem_cache drvRSADecrypt_zone = NULL;
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icp_kmem_cache drvRSAPrivateKey_zone = NULL;
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icp_kmem_cache drvDSARSSign_zone = NULL;
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icp_kmem_cache drvDSARSSignKValue_zone = NULL;
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icp_kmem_cache drvDSAVerify_zone = NULL;
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/*Slab zones for flatbuffers and bufferlist*/
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icp_kmem_cache drvFlatBuffer_zone = NULL;
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static inline int icp_cache_null_check(void)
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{
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return (drvSessionData_zone && drvOpData_zone
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&& drvDH_zone && drvLnModExp_zone && drvRSADecrypt_zone
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&& drvRSAPrivateKey_zone && drvDSARSSign_zone
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&& drvDSARSSign_zone && drvDSARSSignKValue_zone
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&& drvDSAVerify_zone && drvFlatBuffer_zone);
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}
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/*Function to free all allocated slab caches before exiting the module*/
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static void icp_ocfDrvFreeCaches(void);
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int32_t icp_ocfDrvDriverId = INVALID_DRIVER_ID;
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/* Module parameter - gives the number of times LAC deregistration shall be
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re-tried */
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int num_dereg_retries = DEFAULT_DEREG_RETRIES;
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/* Module parameter - gives the delay time in jiffies before a LAC session
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shall be attempted to be deregistered again */
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int dereg_retry_delay_in_jiffies = DEFAULT_DEREG_DELAY_IN_JIFFIES;
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/* Module parameter - gives the maximum number of sessions possible between
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OCF and the OCF EP80579 Driver. If set to zero, there is no limit.*/
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int max_sessions = DEFAULT_OCF_TO_DRV_MAX_SESSION_COUNT;
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/* This is set when the module is removed from the system, no further
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processing can take place if this is set */
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icp_atomic_t icp_ocfDrvIsExiting = ICP_ATOMIC_INIT(0);
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/* This is used to show how many lac sessions were not deregistered*/
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icp_atomic_t lac_session_failed_dereg_count = ICP_ATOMIC_INIT(0);
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/* This is used to track the number of registered sessions between OCF and
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* and the OCF EP80579 driver, when max_session is set to value other than
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* zero. This ensures that the max_session set for the OCF and the driver
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* is equal to the LAC registered sessions */
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icp_atomic_t num_ocf_to_drv_registered_sessions = ICP_ATOMIC_INIT(0);
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/* Head of linked list used to store session data */
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icp_drvSessionListHead_t icp_ocfDrvGlobalSymListHead;
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icp_drvSessionListHead_t icp_ocfDrvGlobalSymListHead_FreeMemList;
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icp_spinlock_t icp_ocfDrvSymSessInfoListSpinlock;
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/*Below pointer is only used in linux, FreeBSD uses the name to
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create its own variable name*/
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icp_workqueue *icp_ocfDrvFreeLacSessionWorkQ = NULL;
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ICP_WORKQUEUE_DEFINE_THREAD(icp_ocfDrvFreeLacSessionWorkQ);
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struct icp_drvBuffListInfo defBuffListInfo;
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/* Name : icp_ocfDrvInit
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*
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* Description : This function will register all the symmetric and asymmetric
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* functionality that will be accelerated by the hardware. It will also
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* get a unique driver ID from the OCF and initialise all slab caches
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*/
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ICP_MODULE_INIT_FUNC(icp_ocfDrvInit)
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{
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int ocfStatus = 0;
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IPRINTK("=== %s ver %d.%d.%d ===\n", ICP_OCF_COMP_NAME,
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ICP_OCF_VER_MAIN, ICP_OCF_VER_MJR, ICP_OCF_VER_MNR);
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if (MAX_DEREG_RETRIES < num_dereg_retries) {
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EPRINTK("Session deregistration retry count set to greater "
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"than %d", MAX_DEREG_RETRIES);
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icp_module_return_code(EINVAL);
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}
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/* Initialize and Start the Cryptographic component */
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if (CPA_STATUS_SUCCESS !=
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cpaCyStartInstance(CPA_INSTANCE_HANDLE_SINGLE)) {
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EPRINTK("Failed to initialize and start the instance "
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"of the Cryptographic component.\n");
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return icp_module_return_code(EINVAL);
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}
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icp_spin_lock_init(&icp_ocfDrvSymSessInfoListSpinlock);
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/* Set the default size of BufferList to allocate */
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memset(&defBuffListInfo, 0, sizeof(struct icp_drvBuffListInfo));
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if (ICP_OCF_DRV_STATUS_SUCCESS !=
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icp_ocfDrvBufferListMemInfo(ICP_OCF_DRV_DEFAULT_BUFFLIST_ARRAYS,
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&defBuffListInfo)) {
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EPRINTK("Failed to get bufferlist memory info.\n");
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return icp_module_return_code(ENOMEM);
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}
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/*Register OCF EP80579 Driver with OCF */
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icp_ocfDrvDriverId = ICP_CRYPTO_GET_DRIVERID();
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if (icp_ocfDrvDriverId < 0) {
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EPRINTK("%s : ICP driver failed to register with OCF!\n",
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__FUNCTION__);
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return icp_module_return_code(ENODEV);
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}
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/*Create all the slab caches used by the OCF EP80579 Driver */
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drvSessionData_zone =
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ICP_CACHE_CREATE(ICP_SESSION_DATA_NAME, struct icp_drvSessionData);
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/*
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* Allocation of the OpData includes the allocation space for meta data.
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* The memory after the opData structure is reserved for this meta data.
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*/
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drvOpData_zone =
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icp_kmem_cache_create(ICP_OP_DATA_NAME,
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sizeof(struct icp_drvOpData) +
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defBuffListInfo.metaSize,
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ICP_KERNEL_CACHE_ALIGN,
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ICP_KERNEL_CACHE_NOINIT);
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drvDH_zone = ICP_CACHE_CREATE(ICP_DH_NAME, CpaCyDhPhase1KeyGenOpData);
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drvLnModExp_zone =
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ICP_CACHE_CREATE(ICP_MODEXP_NAME, CpaCyLnModExpOpData);
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drvRSADecrypt_zone =
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ICP_CACHE_CREATE(ICP_RSA_DECRYPT_NAME, CpaCyRsaDecryptOpData);
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drvRSAPrivateKey_zone =
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ICP_CACHE_CREATE(ICP_RSA_PKEY_NAME, CpaCyRsaPrivateKey);
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drvDSARSSign_zone =
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ICP_CACHE_CREATE(ICP_DSA_SIGN_NAME, CpaCyDsaRSSignOpData);
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/*too awkward to use a macro here */
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drvDSARSSignKValue_zone =
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ICP_CACHE_CREATE(ICP_RAND_VAL_NAME,
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DSA_RS_SIGN_PRIMEQ_SIZE_IN_BYTES);
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drvDSAVerify_zone =
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ICP_CACHE_CREATE(ICP_DSA_VER_NAME, CpaCyDsaVerifyOpData);
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drvFlatBuffer_zone =
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ICP_CACHE_CREATE(ICP_FLAT_BUFF_NAME, CpaFlatBuffer);
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if (0 == icp_cache_null_check()) {
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icp_ocfDrvFreeCaches();
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EPRINTK("%s() line %d: Not enough memory!\n",
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__FUNCTION__, __LINE__);
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return ENOMEM;
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}
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/* Register the ICP symmetric crypto support. */
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ICP_REG_SYM_WITH_OCF(icp_ocfDrvDriverId, CRYPTO_NULL_CBC, ocfStatus);
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ICP_REG_SYM_WITH_OCF(icp_ocfDrvDriverId, CRYPTO_DES_CBC, ocfStatus);
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ICP_REG_SYM_WITH_OCF(icp_ocfDrvDriverId, CRYPTO_3DES_CBC, ocfStatus);
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ICP_REG_SYM_WITH_OCF(icp_ocfDrvDriverId, CRYPTO_AES_CBC, ocfStatus);
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ICP_REG_SYM_WITH_OCF(icp_ocfDrvDriverId, CRYPTO_ARC4, ocfStatus);
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ICP_REG_SYM_WITH_OCF(icp_ocfDrvDriverId, CRYPTO_MD5, ocfStatus);
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ICP_REG_SYM_WITH_OCF(icp_ocfDrvDriverId, CRYPTO_MD5_HMAC, ocfStatus);
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ICP_REG_SYM_WITH_OCF(icp_ocfDrvDriverId, CRYPTO_SHA1, ocfStatus);
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ICP_REG_SYM_WITH_OCF(icp_ocfDrvDriverId, CRYPTO_SHA1_HMAC, ocfStatus);
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ICP_REG_SYM_WITH_OCF(icp_ocfDrvDriverId, CRYPTO_SHA2_256, ocfStatus);
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ICP_REG_SYM_WITH_OCF(icp_ocfDrvDriverId, CRYPTO_SHA2_256_HMAC,
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ocfStatus);
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ICP_REG_SYM_WITH_OCF(icp_ocfDrvDriverId, CRYPTO_SHA2_384, ocfStatus);
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ICP_REG_SYM_WITH_OCF(icp_ocfDrvDriverId, CRYPTO_SHA2_384_HMAC,
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ocfStatus);
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ICP_REG_SYM_WITH_OCF(icp_ocfDrvDriverId, CRYPTO_SHA2_512, ocfStatus);
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ICP_REG_SYM_WITH_OCF(icp_ocfDrvDriverId, CRYPTO_SHA2_512_HMAC,
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ocfStatus);
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/* Register the ICP asymmetric algorithm support */
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ICP_REG_ASYM_WITH_OCF(icp_ocfDrvDriverId, CRK_DH_COMPUTE_KEY,
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ocfStatus);
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ICP_REG_ASYM_WITH_OCF(icp_ocfDrvDriverId, CRK_MOD_EXP, ocfStatus);
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ICP_REG_ASYM_WITH_OCF(icp_ocfDrvDriverId, CRK_MOD_EXP_CRT, ocfStatus);
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ICP_REG_ASYM_WITH_OCF(icp_ocfDrvDriverId, CRK_DSA_SIGN, ocfStatus);
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ICP_REG_ASYM_WITH_OCF(icp_ocfDrvDriverId, CRK_DSA_VERIFY, ocfStatus);
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/* Register the ICP random number generator support */
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ICP_REG_RAND_WITH_OCF(icp_ocfDrvDriverId,
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icp_ocfDrvReadRandom, NULL, ocfStatus);
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if (OCF_ZERO_FUNCTIONALITY_REGISTERED == ocfStatus) {
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DPRINTK("%s: Failed to register any device capabilities\n",
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__FUNCTION__);
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icp_ocfDrvFreeCaches();
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icp_ocfDrvDriverId = INVALID_DRIVER_ID;
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return icp_module_return_code(ECANCELED);
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}
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DPRINTK("%s: Registered %d of %d device capabilities\n",
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__FUNCTION__, ocfStatus, NUM_SUPPORTED_CAPABILITIES);
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/*Session data linked list used during module exit */
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ICP_INIT_LIST_HEAD(&icp_ocfDrvGlobalSymListHead);
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ICP_INIT_LIST_HEAD(&icp_ocfDrvGlobalSymListHead_FreeMemList);
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ICP_WORKQUEUE_CREATE(icp_ocfDrvFreeLacSessionWorkQ, "icpwq");
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if (ICP_WORKQUEUE_NULL_CHECK(icp_ocfDrvFreeLacSessionWorkQ)) {
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EPRINTK("%s: Failed to create single "
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"thread workqueue\n", __FUNCTION__);
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icp_ocfDrvFreeCaches();
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icp_ocfDrvDriverId = INVALID_DRIVER_ID;
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return icp_module_return_code(ENOMEM);
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}
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return icp_module_return_code(0);
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}
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/* Name : icp_ocfDrvExit
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*
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* Description : This function will deregister all the symmetric sessions
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* registered with the LAC component. It will also deregister all symmetric
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* and asymmetric functionality that can be accelerated by the hardware via OCF
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* and random number generation if it is enabled.
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*/
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ICP_MODULE_EXIT_FUNC(icp_ocfDrvExit)
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{
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CpaStatus lacStatus = CPA_STATUS_SUCCESS;
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struct icp_drvSessionData *sessionData = NULL;
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struct icp_drvSessionData *tempSessionData = NULL;
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int i, remaining_delay_time_in_jiffies = 0;
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/* For FreeBSD the invariant macro below makes function to return */
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/* with EBUSY value in the case of any session which has been regi- */
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/* stered with LAC not being deregistered. */
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/* The Linux implementation is empty since it is purely to compensate */
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/* for a limitation of the FreeBSD 7.1 Opencrypto framework. */
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ICP_MODULE_EXIT_INV();
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/* There is a possibility of a process or new session command being */
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/* sent before this variable is incremented. The aim of this variable */
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/* is to stop a loop of calls creating a deadlock situation which */
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/* would prevent the driver from exiting. */
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icp_atomic_set(&icp_ocfDrvIsExiting, 1);
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/*Existing sessions will be routed to another driver after these calls */
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crypto_unregister_all(icp_ocfDrvDriverId);
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crypto_runregister_all(icp_ocfDrvDriverId);
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if (ICP_WORKQUEUE_NULL_CHECK(icp_ocfDrvFreeLacSessionWorkQ)) {
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DPRINTK("%s: workqueue already "
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"destroyed, therefore module exit "
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" function already called. Exiting.\n", __FUNCTION__);
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return ICP_MODULE_EXIT_FUNC_RETURN_VAL;
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}
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/*If any sessions are waiting to be deregistered, do that. This also
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flushes the work queue */
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ICP_WORKQUEUE_DESTROY(icp_ocfDrvFreeLacSessionWorkQ);
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/*ENTER CRITICAL SECTION */
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icp_spin_lockbh_lock(&icp_ocfDrvSymSessInfoListSpinlock);
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ICP_LIST_FOR_EACH_ENTRY_SAFE(tempSessionData, sessionData,
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&icp_ocfDrvGlobalSymListHead, listNode) {
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for (i = 0; i < num_dereg_retries; i++) {
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/*No harm if bad input - LAC will handle error cases */
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if (ICP_SESSION_RUNNING == tempSessionData->inUse) {
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lacStatus =
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cpaCySymRemoveSession
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(CPA_INSTANCE_HANDLE_SINGLE,
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tempSessionData->sessHandle);
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if (CPA_STATUS_SUCCESS == lacStatus) {
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/* Succesfully deregistered */
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break;
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} else if (CPA_STATUS_RETRY != lacStatus) {
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icp_atomic_inc
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(&lac_session_failed_dereg_count);
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break;
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}
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/*schedule_timout returns the time left for completion if
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* this task is set to TASK_INTERRUPTIBLE */
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remaining_delay_time_in_jiffies =
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dereg_retry_delay_in_jiffies;
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while (0 > remaining_delay_time_in_jiffies) {
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remaining_delay_time_in_jiffies =
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icp_schedule_timeout
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(&icp_ocfDrvSymSessInfoListSpinlock,
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remaining_delay_time_in_jiffies);
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}
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DPRINTK
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("%s(): Retry %d to deregistrate the session\n",
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__FUNCTION__, i);
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}
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}
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/*remove from current list */
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ICP_LIST_DEL(tempSessionData, listNode);
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/*add to free mem linked list */
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ICP_LIST_ADD(tempSessionData,
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&icp_ocfDrvGlobalSymListHead_FreeMemList,
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listNode);
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}
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/*EXIT CRITICAL SECTION */
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icp_spin_lockbh_unlock(&icp_ocfDrvSymSessInfoListSpinlock);
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/*set back to initial values */
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sessionData = NULL;
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/*still have a reference in our list! */
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tempSessionData = NULL;
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/*free memory */
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|
|
ICP_LIST_FOR_EACH_ENTRY_SAFE(tempSessionData, sessionData,
|
|
&icp_ocfDrvGlobalSymListHead_FreeMemList,
|
|
listNode) {
|
|
|
|
ICP_LIST_DEL(tempSessionData, listNode);
|
|
/* Free allocated CpaCySymSessionCtx */
|
|
if (NULL != tempSessionData->sessHandle) {
|
|
icp_kfree(tempSessionData->sessHandle);
|
|
}
|
|
memset(tempSessionData, 0, sizeof(struct icp_drvSessionData));
|
|
ICP_CACHE_FREE(drvSessionData_zone, tempSessionData);
|
|
}
|
|
|
|
if (0 != icp_atomic_read(&lac_session_failed_dereg_count)) {
|
|
DPRINTK("%s(): %d LAC sessions were not deregistered "
|
|
"correctly. This is not a clean exit! \n",
|
|
__FUNCTION__,
|
|
icp_atomic_read(&lac_session_failed_dereg_count));
|
|
}
|
|
|
|
icp_ocfDrvFreeCaches();
|
|
icp_ocfDrvDriverId = INVALID_DRIVER_ID;
|
|
|
|
icp_spin_lock_destroy(&icp_ocfDrvSymSessInfoListSpinlock);
|
|
|
|
/* Shutdown the Cryptographic component */
|
|
lacStatus = cpaCyStopInstance(CPA_INSTANCE_HANDLE_SINGLE);
|
|
if (CPA_STATUS_SUCCESS != lacStatus) {
|
|
DPRINTK("%s(): Failed to stop instance of the "
|
|
"Cryptographic component.(status == %d)\n",
|
|
__FUNCTION__, lacStatus);
|
|
}
|
|
|
|
return ICP_MODULE_EXIT_FUNC_RETURN_VAL;
|
|
}
|
|
|
|
/* Name : icp_ocfDrvFreeCaches
|
|
*
|
|
* Description : This function deregisters all slab caches
|
|
*/
|
|
static void icp_ocfDrvFreeCaches(void)
|
|
{
|
|
icp_atomic_set(&icp_ocfDrvIsExiting, 1);
|
|
|
|
/*Sym Zones */
|
|
ICP_CACHE_DESTROY(drvSessionData_zone);
|
|
ICP_CACHE_DESTROY(drvOpData_zone);
|
|
|
|
/*Asym zones */
|
|
ICP_CACHE_DESTROY(drvDH_zone);
|
|
ICP_CACHE_DESTROY(drvLnModExp_zone);
|
|
ICP_CACHE_DESTROY(drvRSADecrypt_zone);
|
|
ICP_CACHE_DESTROY(drvRSAPrivateKey_zone);
|
|
ICP_CACHE_DESTROY(drvDSARSSignKValue_zone);
|
|
ICP_CACHE_DESTROY(drvDSARSSign_zone);
|
|
ICP_CACHE_DESTROY(drvDSAVerify_zone);
|
|
|
|
/*FlatBuffer and BufferList Zones */
|
|
ICP_CACHE_DESTROY(drvFlatBuffer_zone);
|
|
|
|
}
|
|
|
|
/* Name : icp_ocfDrvDeregRetry
|
|
*
|
|
* Description : This function will try to farm the session deregistration
|
|
* off to a work queue. If it fails, nothing more can be done and it
|
|
* returns an error
|
|
*/
|
|
int icp_ocfDrvDeregRetry(CpaCySymSessionCtx sessionToDeregister)
|
|
{
|
|
struct icp_ocfDrvFreeLacSession *workstore = NULL;
|
|
|
|
DPRINTK("%s(): Retry - Deregistering session (%p)\n",
|
|
__FUNCTION__, sessionToDeregister);
|
|
|
|
/*make sure the session is not available to be allocated during this
|
|
process */
|
|
icp_atomic_inc(&lac_session_failed_dereg_count);
|
|
|
|
/*Farm off to work queue */
|
|
workstore =
|
|
icp_kmalloc(sizeof(struct icp_ocfDrvFreeLacSession), ICP_M_NOWAIT);
|
|
if (NULL == workstore) {
|
|
DPRINTK("%s(): unable to free session - no memory available "
|
|
"for work queue\n", __FUNCTION__);
|
|
return ENOMEM;
|
|
}
|
|
|
|
workstore->sessionToDeregister = sessionToDeregister;
|
|
|
|
icp_init_work(&(workstore->work),
|
|
icp_ocfDrvDeferedFreeLacSessionTaskFn, workstore);
|
|
|
|
ICP_WORKQUEUE_ENQUEUE(icp_ocfDrvFreeLacSessionWorkQ,
|
|
&(workstore->work));
|
|
|
|
return ICP_OCF_DRV_STATUS_SUCCESS;
|
|
|
|
}
|
|
|
|
/* Name : icp_ocfDrvDeferedFreeLacSessionProcess
|
|
*
|
|
* Description : This function will retry (module input parameter)
|
|
* 'num_dereg_retries' times to deregister any symmetric session that recieves a
|
|
* CPA_STATUS_RETRY message from the LAC component. This function is run in
|
|
* Thread context because it is called from a worker thread
|
|
*/
|
|
void icp_ocfDrvDeferedFreeLacSessionProcess(void *arg)
|
|
{
|
|
struct icp_ocfDrvFreeLacSession *workstore = NULL;
|
|
CpaCySymSessionCtx sessionToDeregister = NULL;
|
|
int i = 0;
|
|
int remaining_delay_time_in_jiffies = 0;
|
|
CpaStatus lacStatus = CPA_STATUS_SUCCESS;
|
|
|
|
workstore = (struct icp_ocfDrvFreeLacSession *)arg;
|
|
if (NULL == workstore) {
|
|
DPRINTK("%s() function called with null parameter \n",
|
|
__FUNCTION__);
|
|
return;
|
|
}
|
|
|
|
sessionToDeregister = workstore->sessionToDeregister;
|
|
icp_kfree(workstore);
|
|
|
|
/*if exiting, give deregistration one more blast only */
|
|
if (icp_atomic_read(&icp_ocfDrvIsExiting) == CPA_TRUE) {
|
|
lacStatus = cpaCySymRemoveSession(CPA_INSTANCE_HANDLE_SINGLE,
|
|
sessionToDeregister);
|
|
|
|
if (lacStatus != CPA_STATUS_SUCCESS) {
|
|
DPRINTK("%s() Failed to Dereg LAC session %p "
|
|
"during module exit\n", __FUNCTION__,
|
|
sessionToDeregister);
|
|
return;
|
|
}
|
|
|
|
icp_atomic_dec(&lac_session_failed_dereg_count);
|
|
return;
|
|
}
|
|
|
|
for (i = 0; i <= num_dereg_retries; i++) {
|
|
lacStatus = cpaCySymRemoveSession(CPA_INSTANCE_HANDLE_SINGLE,
|
|
sessionToDeregister);
|
|
|
|
if (lacStatus == CPA_STATUS_SUCCESS) {
|
|
icp_atomic_dec(&lac_session_failed_dereg_count);
|
|
return;
|
|
}
|
|
if (lacStatus != CPA_STATUS_RETRY) {
|
|
DPRINTK("%s() Failed to deregister session - lacStatus "
|
|
" = %d", __FUNCTION__, lacStatus);
|
|
break;
|
|
}
|
|
|
|
/*schedule_timout returns the time left for completion if this
|
|
task is set to TASK_INTERRUPTIBLE */
|
|
remaining_delay_time_in_jiffies = dereg_retry_delay_in_jiffies;
|
|
while (0 < remaining_delay_time_in_jiffies) {
|
|
remaining_delay_time_in_jiffies =
|
|
icp_schedule_timeout(NULL,
|
|
remaining_delay_time_in_jiffies);
|
|
}
|
|
|
|
}
|
|
|
|
DPRINTK("%s(): Unable to deregister session\n", __FUNCTION__);
|
|
DPRINTK("%s(): Number of unavailable LAC sessions = %d\n", __FUNCTION__,
|
|
icp_atomic_read(&lac_session_failed_dereg_count));
|
|
}
|
|
|
|
/* Name : icp_ocfDrvPtrAndLenToFlatBuffer
|
|
*
|
|
* Description : This function converts a "pointer and length" buffer
|
|
* structure to Fredericksburg Flat Buffer (CpaFlatBuffer) format.
|
|
*
|
|
* This function assumes that the data passed in are valid.
|
|
*/
|
|
inline void
|
|
icp_ocfDrvPtrAndLenToFlatBuffer(void *pData, uint32_t len,
|
|
CpaFlatBuffer * pFlatBuffer)
|
|
{
|
|
pFlatBuffer->pData = pData;
|
|
pFlatBuffer->dataLenInBytes = len;
|
|
}
|
|
|
|
/* Name : icp_ocfDrvPtrAndLenToBufferList
|
|
*
|
|
* Description : This function converts a "pointer and length" buffer
|
|
* structure to Fredericksburg Scatter/Gather Buffer (CpaBufferList) format.
|
|
*
|
|
* This function assumes that the data passed in are valid.
|
|
*/
|
|
inline void
|
|
icp_ocfDrvPtrAndLenToBufferList(void *pDataIn, uint32_t length,
|
|
CpaBufferList * pBufferList)
|
|
{
|
|
pBufferList->numBuffers = 1;
|
|
pBufferList->pBuffers->pData = pDataIn;
|
|
pBufferList->pBuffers->dataLenInBytes = length;
|
|
}
|
|
|
|
/* Name : icp_ocfDrvBufferListToPtrAndLen
|
|
*
|
|
* Description : This function converts Fredericksburg Scatter/Gather Buffer
|
|
* (CpaBufferList) format to a "pointer and length" buffer structure.
|
|
*
|
|
* This function assumes that the data passed in are valid.
|
|
*/
|
|
inline void
|
|
icp_ocfDrvBufferListToPtrAndLen(CpaBufferList * pBufferList,
|
|
void **ppDataOut, uint32_t * pLength)
|
|
{
|
|
*ppDataOut = pBufferList->pBuffers->pData;
|
|
*pLength = pBufferList->pBuffers->dataLenInBytes;
|
|
}
|
|
|
|
/* Name : icp_ocfDrvBufferListMemInfo
|
|
*
|
|
* Description : This function will set the number of flat buffers in
|
|
* bufferlist, the size of memory to allocate for the pPrivateMetaData
|
|
* member of the CpaBufferList.
|
|
*/
|
|
int
|
|
icp_ocfDrvBufferListMemInfo(uint16_t numBuffers,
|
|
struct icp_drvBuffListInfo *buffListInfo)
|
|
{
|
|
buffListInfo->numBuffers = numBuffers;
|
|
|
|
if (CPA_STATUS_SUCCESS !=
|
|
cpaCyBufferListGetMetaSize(CPA_INSTANCE_HANDLE_SINGLE,
|
|
buffListInfo->numBuffers,
|
|
&(buffListInfo->metaSize))) {
|
|
EPRINTK("%s() Failed to get buffer list meta size.\n",
|
|
__FUNCTION__);
|
|
return ICP_OCF_DRV_STATUS_FAIL;
|
|
}
|
|
|
|
return ICP_OCF_DRV_STATUS_SUCCESS;
|
|
}
|
|
|
|
/* Name : icp_ocfDrvFreeFlatBuffer
|
|
*
|
|
* Description : This function will deallocate flat buffer.
|
|
*/
|
|
inline void icp_ocfDrvFreeFlatBuffer(CpaFlatBuffer * pFlatBuffer)
|
|
{
|
|
if (pFlatBuffer != NULL) {
|
|
memset(pFlatBuffer, 0, sizeof(CpaFlatBuffer));
|
|
ICP_CACHE_FREE(drvFlatBuffer_zone, pFlatBuffer);
|
|
}
|
|
}
|
|
|
|
/* Name : icp_ocfDrvAllocMetaData
|
|
*
|
|
* Description : This function will allocate memory for the
|
|
* pPrivateMetaData member of CpaBufferList.
|
|
*/
|
|
inline int
|
|
icp_ocfDrvAllocMetaData(CpaBufferList * pBufferList,
|
|
struct icp_drvOpData *pOpData)
|
|
{
|
|
Cpa32U metaSize = 0;
|
|
|
|
if (pBufferList->numBuffers <= ICP_OCF_DRV_DEFAULT_BUFFLIST_ARRAYS) {
|
|
uint8_t *pOpDataStartAddr = (uint8_t *) pOpData;
|
|
|
|
if (0 == defBuffListInfo.metaSize) {
|
|
pBufferList->pPrivateMetaData = NULL;
|
|
return ICP_OCF_DRV_STATUS_SUCCESS;
|
|
}
|
|
/*
|
|
* The meta data allocation has been included as part of the
|
|
* op data. It has been pre-allocated in memory just after the
|
|
* icp_drvOpData structure.
|
|
*/
|
|
pBufferList->pPrivateMetaData = (void *)(pOpDataStartAddr +
|
|
sizeof(struct
|
|
icp_drvOpData));
|
|
} else {
|
|
if (CPA_STATUS_SUCCESS !=
|
|
cpaCyBufferListGetMetaSize(CPA_INSTANCE_HANDLE_SINGLE,
|
|
pBufferList->numBuffers,
|
|
&metaSize)) {
|
|
EPRINTK("%s() Failed to get buffer list meta size.\n",
|
|
__FUNCTION__);
|
|
return ICP_OCF_DRV_STATUS_FAIL;
|
|
}
|
|
|
|
if (0 == metaSize) {
|
|
pBufferList->pPrivateMetaData = NULL;
|
|
return ICP_OCF_DRV_STATUS_SUCCESS;
|
|
}
|
|
|
|
pBufferList->pPrivateMetaData =
|
|
icp_kmalloc(metaSize, ICP_M_NOWAIT);
|
|
}
|
|
if (NULL == pBufferList->pPrivateMetaData) {
|
|
EPRINTK("%s() Failed to allocate pPrivateMetaData.\n",
|
|
__FUNCTION__);
|
|
return ICP_OCF_DRV_STATUS_FAIL;
|
|
}
|
|
|
|
return ICP_OCF_DRV_STATUS_SUCCESS;
|
|
}
|
|
|
|
/* Name : icp_ocfDrvFreeMetaData
|
|
*
|
|
* Description : This function will deallocate pPrivateMetaData memory.
|
|
*/
|
|
inline void icp_ocfDrvFreeMetaData(CpaBufferList * pBufferList)
|
|
{
|
|
if (NULL == pBufferList->pPrivateMetaData) {
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Only free the meta data if the BufferList has more than
|
|
* ICP_OCF_DRV_DEFAULT_BUFFLIST_ARRAYS number of buffers.
|
|
* Otherwise, the meta data shall be freed when the icp_drvOpData is
|
|
* freed.
|
|
*/
|
|
if (ICP_OCF_DRV_DEFAULT_BUFFLIST_ARRAYS < pBufferList->numBuffers) {
|
|
icp_kfree(pBufferList->pPrivateMetaData);
|
|
}
|
|
}
|
|
|
|
/* Module declaration, init and exit functions */
|
|
ICP_DECLARE_MODULE(icp_ocf, icp_ocfDrvInit, icp_ocfDrvExit);
|
|
ICP_MODULE_DESCRIPTION("OCF Driver for Intel Quick Assist crypto acceleration");
|
|
ICP_MODULE_VERSION(icp_ocf, ICP_OCF_VER_MJR);
|
|
ICP_MODULE_LICENSE("Dual BSD/GPL");
|
|
ICP_MODULE_AUTHOR("Intel");
|
|
|
|
/* Module parameters */
|
|
ICP_MODULE_PARAM_INT(icp_ocf, num_dereg_retries,
|
|
"Number of times to retry LAC Sym Session Deregistration. "
|
|
"Default 10, Max 100");
|
|
ICP_MODULE_PARAM_INT(icp_ocf, dereg_retry_delay_in_jiffies, "Delay in jiffies "
|
|
"(added to a schedule() function call) before a LAC Sym "
|
|
"Session Dereg is retried. Default 10");
|
|
ICP_MODULE_PARAM_INT(icp_ocf, max_sessions,
|
|
"This sets the maximum number of sessions "
|
|
"between OCF and this driver. If this value is set to zero,"
|
|
"max session count checking is disabled. Default is zero(0)");
|
|
|
|
/* Module dependencies */
|
|
#define MODULE_MIN_VER 1
|
|
#define CRYPTO_MAX_VER 3
|
|
#define LAC_MAX_VER 2
|
|
|
|
ICP_MODULE_DEPEND(icp_ocf, crypto, MODULE_MIN_VER, MODULE_MIN_VER,
|
|
CRYPTO_MAX_VER);
|
|
ICP_MODULE_DEPEND(icp_ocf, cryptodev, MODULE_MIN_VER, MODULE_MIN_VER,
|
|
CRYPTO_MAX_VER);
|
|
ICP_MODULE_DEPEND(icp_ocf, icp_crypto, MODULE_MIN_VER, MODULE_MIN_VER,
|
|
LAC_MAX_VER);
|