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openwrt-xburst/target/linux/generic/files/crypto/ocf/ep80579/icp_common.c
nbd c5552ad039 rename target/linux/generic-2.6 to generic 
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@21952 3c298f89-4303-0410-b956-a3cf2f4a3e73
2010-06-26 20:42:58 +00:00

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/*************************************************************************
*
* 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) 2007,2008,2009 Intel Corporation. All rights reserved.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
* The full GNU General Public License is included in this distribution
* in the file called LICENSE.GPL.
*
* Contact Information:
* Intel Corporation
*
* BSD LICENSE
*
* Copyright(c) 2007,2008,2009 Intel Corporation. All rights reserved.
* All rights reserved.
*
* 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.
*
*
* version: Security.L.1.0.2-229
*
***************************************************************************/
/*
* An OCF module that uses Intel® QuickAssist Integrated Accelerator to do the
* crypto.
*
* This driver requires the ICP Access Library that is available from Intel in
* order to operate.
*/
#include "icp_ocf.h"
#define ICP_OCF_COMP_NAME "ICP_OCF"
#define ICP_OCF_VER_MAIN (2)
#define ICP_OCF_VER_MJR (1)
#define ICP_OCF_VER_MNR (0)
#define MAX_DEREG_RETRIES (100)
#define DEFAULT_DEREG_RETRIES (10)
#define DEFAULT_DEREG_DELAY_IN_JIFFIES (10)
/* This defines the maximum number of sessions possible between OCF
and the OCF EP80579 Driver. If set to zero, there is no limit. */
#define DEFAULT_OCF_TO_DRV_MAX_SESSION_COUNT (0)
#define NUM_SUPPORTED_CAPABILITIES (21)
/*Slab zone names*/
#define ICP_SESSION_DATA_NAME "icp_ocf.SesDat"
#define ICP_OP_DATA_NAME "icp_ocf.OpDat"
#define ICP_DH_NAME "icp_ocf.DH"
#define ICP_MODEXP_NAME "icp_ocf.ModExp"
#define ICP_RSA_DECRYPT_NAME "icp_ocf.RSAdec"
#define ICP_RSA_PKEY_NAME "icp_ocf.RSApk"
#define ICP_DSA_SIGN_NAME "icp_ocf.DSAsg"
#define ICP_DSA_VER_NAME "icp_ocf.DSAver"
#define ICP_RAND_VAL_NAME "icp_ocf.DSArnd"
#define ICP_FLAT_BUFF_NAME "icp_ocf.FB"
/*Slabs zones*/
icp_kmem_cache drvSessionData_zone = NULL;
icp_kmem_cache drvOpData_zone = NULL;
icp_kmem_cache drvDH_zone = NULL;
icp_kmem_cache drvLnModExp_zone = NULL;
icp_kmem_cache drvRSADecrypt_zone = NULL;
icp_kmem_cache drvRSAPrivateKey_zone = NULL;
icp_kmem_cache drvDSARSSign_zone = NULL;
icp_kmem_cache drvDSARSSignKValue_zone = NULL;
icp_kmem_cache drvDSAVerify_zone = NULL;
/*Slab zones for flatbuffers and bufferlist*/
icp_kmem_cache drvFlatBuffer_zone = NULL;
static inline int icp_cache_null_check(void)
{
return (drvSessionData_zone && drvOpData_zone
&& drvDH_zone && drvLnModExp_zone && drvRSADecrypt_zone
&& drvRSAPrivateKey_zone && drvDSARSSign_zone
&& drvDSARSSign_zone && drvDSARSSignKValue_zone
&& drvDSAVerify_zone && drvFlatBuffer_zone);
}
/*Function to free all allocated slab caches before exiting the module*/
static void icp_ocfDrvFreeCaches(void);
int32_t icp_ocfDrvDriverId = INVALID_DRIVER_ID;
/* Module parameter - gives the number of times LAC deregistration shall be
re-tried */
int num_dereg_retries = DEFAULT_DEREG_RETRIES;
/* Module parameter - gives the delay time in jiffies before a LAC session
shall be attempted to be deregistered again */
int dereg_retry_delay_in_jiffies = DEFAULT_DEREG_DELAY_IN_JIFFIES;
/* Module parameter - gives the maximum number of sessions possible between
OCF and the OCF EP80579 Driver. If set to zero, there is no limit.*/
int max_sessions = DEFAULT_OCF_TO_DRV_MAX_SESSION_COUNT;
/* This is set when the module is removed from the system, no further
processing can take place if this is set */
icp_atomic_t icp_ocfDrvIsExiting = ICP_ATOMIC_INIT(0);
/* This is used to show how many lac sessions were not deregistered*/
icp_atomic_t lac_session_failed_dereg_count = ICP_ATOMIC_INIT(0);
/* This is used to track the number of registered sessions between OCF and
* and the OCF EP80579 driver, when max_session is set to value other than
* zero. This ensures that the max_session set for the OCF and the driver
* is equal to the LAC registered sessions */
icp_atomic_t num_ocf_to_drv_registered_sessions = ICP_ATOMIC_INIT(0);
/* Head of linked list used to store session data */
icp_drvSessionListHead_t icp_ocfDrvGlobalSymListHead;
icp_drvSessionListHead_t icp_ocfDrvGlobalSymListHead_FreeMemList;
icp_spinlock_t icp_ocfDrvSymSessInfoListSpinlock;
/*Below pointer is only used in linux, FreeBSD uses the name to
create its own variable name*/
icp_workqueue *icp_ocfDrvFreeLacSessionWorkQ = NULL;
ICP_WORKQUEUE_DEFINE_THREAD(icp_ocfDrvFreeLacSessionWorkQ);
struct icp_drvBuffListInfo defBuffListInfo;
/* Name : icp_ocfDrvInit
*
* Description : This function will register all the symmetric and asymmetric
* functionality that will be accelerated by the hardware. It will also
* get a unique driver ID from the OCF and initialise all slab caches
*/
ICP_MODULE_INIT_FUNC(icp_ocfDrvInit)
{
int ocfStatus = 0;
IPRINTK("=== %s ver %d.%d.%d ===\n", ICP_OCF_COMP_NAME,
ICP_OCF_VER_MAIN, ICP_OCF_VER_MJR, ICP_OCF_VER_MNR);
if (MAX_DEREG_RETRIES < num_dereg_retries) {
EPRINTK("Session deregistration retry count set to greater "
"than %d", MAX_DEREG_RETRIES);
icp_module_return_code(EINVAL);
}
/* Initialize and Start the Cryptographic component */
if (CPA_STATUS_SUCCESS !=
cpaCyStartInstance(CPA_INSTANCE_HANDLE_SINGLE)) {
EPRINTK("Failed to initialize and start the instance "
"of the Cryptographic component.\n");
return icp_module_return_code(EINVAL);
}
icp_spin_lock_init(&icp_ocfDrvSymSessInfoListSpinlock);
/* Set the default size of BufferList to allocate */
memset(&defBuffListInfo, 0, sizeof(struct icp_drvBuffListInfo));
if (ICP_OCF_DRV_STATUS_SUCCESS !=
icp_ocfDrvBufferListMemInfo(ICP_OCF_DRV_DEFAULT_BUFFLIST_ARRAYS,
&defBuffListInfo)) {
EPRINTK("Failed to get bufferlist memory info.\n");
return icp_module_return_code(ENOMEM);
}
/*Register OCF EP80579 Driver with OCF */
icp_ocfDrvDriverId = ICP_CRYPTO_GET_DRIVERID();
if (icp_ocfDrvDriverId < 0) {
EPRINTK("%s : ICP driver failed to register with OCF!\n",
__FUNCTION__);
return icp_module_return_code(ENODEV);
}
/*Create all the slab caches used by the OCF EP80579 Driver */
drvSessionData_zone =
ICP_CACHE_CREATE(ICP_SESSION_DATA_NAME, struct icp_drvSessionData);
/*
* Allocation of the OpData includes the allocation space for meta data.
* The memory after the opData structure is reserved for this meta data.
*/
drvOpData_zone =
icp_kmem_cache_create(ICP_OP_DATA_NAME,
sizeof(struct icp_drvOpData) +
defBuffListInfo.metaSize,
ICP_KERNEL_CACHE_ALIGN,
ICP_KERNEL_CACHE_NOINIT);
drvDH_zone = ICP_CACHE_CREATE(ICP_DH_NAME, CpaCyDhPhase1KeyGenOpData);
drvLnModExp_zone =
ICP_CACHE_CREATE(ICP_MODEXP_NAME, CpaCyLnModExpOpData);
drvRSADecrypt_zone =
ICP_CACHE_CREATE(ICP_RSA_DECRYPT_NAME, CpaCyRsaDecryptOpData);
drvRSAPrivateKey_zone =
ICP_CACHE_CREATE(ICP_RSA_PKEY_NAME, CpaCyRsaPrivateKey);
drvDSARSSign_zone =
ICP_CACHE_CREATE(ICP_DSA_SIGN_NAME, CpaCyDsaRSSignOpData);
/*too awkward to use a macro here */
drvDSARSSignKValue_zone =
ICP_CACHE_CREATE(ICP_RAND_VAL_NAME,
DSA_RS_SIGN_PRIMEQ_SIZE_IN_BYTES);
drvDSAVerify_zone =
ICP_CACHE_CREATE(ICP_DSA_VER_NAME, CpaCyDsaVerifyOpData);
drvFlatBuffer_zone =
ICP_CACHE_CREATE(ICP_FLAT_BUFF_NAME, CpaFlatBuffer);
if (0 == icp_cache_null_check()) {
icp_ocfDrvFreeCaches();
EPRINTK("%s() line %d: Not enough memory!\n",
__FUNCTION__, __LINE__);
return ENOMEM;
}
/* Register the ICP symmetric crypto support. */
ICP_REG_SYM_WITH_OCF(icp_ocfDrvDriverId, CRYPTO_NULL_CBC, ocfStatus);
ICP_REG_SYM_WITH_OCF(icp_ocfDrvDriverId, CRYPTO_DES_CBC, ocfStatus);
ICP_REG_SYM_WITH_OCF(icp_ocfDrvDriverId, CRYPTO_3DES_CBC, ocfStatus);
ICP_REG_SYM_WITH_OCF(icp_ocfDrvDriverId, CRYPTO_AES_CBC, ocfStatus);
ICP_REG_SYM_WITH_OCF(icp_ocfDrvDriverId, CRYPTO_ARC4, ocfStatus);
ICP_REG_SYM_WITH_OCF(icp_ocfDrvDriverId, CRYPTO_MD5, ocfStatus);
ICP_REG_SYM_WITH_OCF(icp_ocfDrvDriverId, CRYPTO_MD5_HMAC, ocfStatus);
ICP_REG_SYM_WITH_OCF(icp_ocfDrvDriverId, CRYPTO_SHA1, ocfStatus);
ICP_REG_SYM_WITH_OCF(icp_ocfDrvDriverId, CRYPTO_SHA1_HMAC, ocfStatus);
ICP_REG_SYM_WITH_OCF(icp_ocfDrvDriverId, CRYPTO_SHA2_256, ocfStatus);
ICP_REG_SYM_WITH_OCF(icp_ocfDrvDriverId, CRYPTO_SHA2_256_HMAC,
ocfStatus);
ICP_REG_SYM_WITH_OCF(icp_ocfDrvDriverId, CRYPTO_SHA2_384, ocfStatus);
ICP_REG_SYM_WITH_OCF(icp_ocfDrvDriverId, CRYPTO_SHA2_384_HMAC,
ocfStatus);
ICP_REG_SYM_WITH_OCF(icp_ocfDrvDriverId, CRYPTO_SHA2_512, ocfStatus);
ICP_REG_SYM_WITH_OCF(icp_ocfDrvDriverId, CRYPTO_SHA2_512_HMAC,
ocfStatus);
/* Register the ICP asymmetric algorithm support */
ICP_REG_ASYM_WITH_OCF(icp_ocfDrvDriverId, CRK_DH_COMPUTE_KEY,
ocfStatus);
ICP_REG_ASYM_WITH_OCF(icp_ocfDrvDriverId, CRK_MOD_EXP, ocfStatus);
ICP_REG_ASYM_WITH_OCF(icp_ocfDrvDriverId, CRK_MOD_EXP_CRT, ocfStatus);
ICP_REG_ASYM_WITH_OCF(icp_ocfDrvDriverId, CRK_DSA_SIGN, ocfStatus);
ICP_REG_ASYM_WITH_OCF(icp_ocfDrvDriverId, CRK_DSA_VERIFY, ocfStatus);
/* Register the ICP random number generator support */
ICP_REG_RAND_WITH_OCF(icp_ocfDrvDriverId,
icp_ocfDrvReadRandom, NULL, ocfStatus);
if (OCF_ZERO_FUNCTIONALITY_REGISTERED == ocfStatus) {
DPRINTK("%s: Failed to register any device capabilities\n",
__FUNCTION__);
icp_ocfDrvFreeCaches();
icp_ocfDrvDriverId = INVALID_DRIVER_ID;
return icp_module_return_code(ECANCELED);
}
DPRINTK("%s: Registered %d of %d device capabilities\n",
__FUNCTION__, ocfStatus, NUM_SUPPORTED_CAPABILITIES);
/*Session data linked list used during module exit */
ICP_INIT_LIST_HEAD(&icp_ocfDrvGlobalSymListHead);
ICP_INIT_LIST_HEAD(&icp_ocfDrvGlobalSymListHead_FreeMemList);
ICP_WORKQUEUE_CREATE(icp_ocfDrvFreeLacSessionWorkQ, "icpwq");
if (ICP_WORKQUEUE_NULL_CHECK(icp_ocfDrvFreeLacSessionWorkQ)) {
EPRINTK("%s: Failed to create single "
"thread workqueue\n", __FUNCTION__);
icp_ocfDrvFreeCaches();
icp_ocfDrvDriverId = INVALID_DRIVER_ID;
return icp_module_return_code(ENOMEM);
}
return icp_module_return_code(0);
}
/* Name : icp_ocfDrvExit
*
* Description : This function will deregister all the symmetric sessions
* registered with the LAC component. It will also deregister all symmetric
* and asymmetric functionality that can be accelerated by the hardware via OCF
* and random number generation if it is enabled.
*/
ICP_MODULE_EXIT_FUNC(icp_ocfDrvExit)
{
CpaStatus lacStatus = CPA_STATUS_SUCCESS;
struct icp_drvSessionData *sessionData = NULL;
struct icp_drvSessionData *tempSessionData = NULL;
int i, remaining_delay_time_in_jiffies = 0;
/* For FreeBSD the invariant macro below makes function to return */
/* with EBUSY value in the case of any session which has been regi- */
/* stered with LAC not being deregistered. */
/* The Linux implementation is empty since it is purely to compensate */
/* for a limitation of the FreeBSD 7.1 Opencrypto framework. */
ICP_MODULE_EXIT_INV();
/* There is a possibility of a process or new session command being */
/* sent before this variable is incremented. The aim of this variable */
/* is to stop a loop of calls creating a deadlock situation which */
/* would prevent the driver from exiting. */
icp_atomic_set(&icp_ocfDrvIsExiting, 1);
/*Existing sessions will be routed to another driver after these calls */
crypto_unregister_all(icp_ocfDrvDriverId);
crypto_runregister_all(icp_ocfDrvDriverId);
if (ICP_WORKQUEUE_NULL_CHECK(icp_ocfDrvFreeLacSessionWorkQ)) {
DPRINTK("%s: workqueue already "
"destroyed, therefore module exit "
" function already called. Exiting.\n", __FUNCTION__);
return ICP_MODULE_EXIT_FUNC_RETURN_VAL;
}
/*If any sessions are waiting to be deregistered, do that. This also
flushes the work queue */
ICP_WORKQUEUE_DESTROY(icp_ocfDrvFreeLacSessionWorkQ);
/*ENTER CRITICAL SECTION */
icp_spin_lockbh_lock(&icp_ocfDrvSymSessInfoListSpinlock);
ICP_LIST_FOR_EACH_ENTRY_SAFE(tempSessionData, sessionData,
&icp_ocfDrvGlobalSymListHead, listNode) {
for (i = 0; i < num_dereg_retries; i++) {
/*No harm if bad input - LAC will handle error cases */
if (ICP_SESSION_RUNNING == tempSessionData->inUse) {
lacStatus =
cpaCySymRemoveSession
(CPA_INSTANCE_HANDLE_SINGLE,
tempSessionData->sessHandle);
if (CPA_STATUS_SUCCESS == lacStatus) {
/* Succesfully deregistered */
break;
} else if (CPA_STATUS_RETRY != lacStatus) {
icp_atomic_inc
(&lac_session_failed_dereg_count);
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
(&icp_ocfDrvSymSessInfoListSpinlock,
remaining_delay_time_in_jiffies);
}
DPRINTK
("%s(): Retry %d to deregistrate the session\n",
__FUNCTION__, i);
}
}
/*remove from current list */
ICP_LIST_DEL(tempSessionData, listNode);
/*add to free mem linked list */
ICP_LIST_ADD(tempSessionData,
&icp_ocfDrvGlobalSymListHead_FreeMemList,
listNode);
}
/*EXIT CRITICAL SECTION */
icp_spin_lockbh_unlock(&icp_ocfDrvSymSessInfoListSpinlock);
/*set back to initial values */
sessionData = NULL;
/*still have a reference in our list! */
tempSessionData = NULL;
/*free memory */
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);
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