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crypto.c revision 1.74
      1  1.74  knakahar /*	$NetBSD: crypto.c,v 1.74 2017/05/24 09:57:36 knakahara Exp $ */
      2   1.1  jonathan /*	$FreeBSD: src/sys/opencrypto/crypto.c,v 1.4.2.5 2003/02/26 00:14:05 sam Exp $	*/
      3   1.1  jonathan /*	$OpenBSD: crypto.c,v 1.41 2002/07/17 23:52:38 art Exp $	*/
      4   1.1  jonathan 
      5  1.27       tls /*-
      6  1.27       tls  * Copyright (c) 2008 The NetBSD Foundation, Inc.
      7  1.27       tls  * All rights reserved.
      8  1.27       tls  *
      9  1.27       tls  * This code is derived from software contributed to The NetBSD Foundation
     10  1.27       tls  * by Coyote Point Systems, Inc.
     11  1.27       tls  *
     12  1.27       tls  * Redistribution and use in source and binary forms, with or without
     13  1.27       tls  * modification, are permitted provided that the following conditions
     14  1.27       tls  * are met:
     15  1.27       tls  * 1. Redistributions of source code must retain the above copyright
     16  1.27       tls  *    notice, this list of conditions and the following disclaimer.
     17  1.27       tls  * 2. Redistributions in binary form must reproduce the above copyright
     18  1.27       tls  *    notice, this list of conditions and the following disclaimer in the
     19  1.27       tls  *    documentation and/or other materials provided with the distribution.
     20  1.27       tls  *
     21  1.27       tls  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     22  1.27       tls  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     23  1.27       tls  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     24  1.27       tls  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     25  1.27       tls  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     26  1.27       tls  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     27  1.27       tls  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     28  1.27       tls  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     29  1.27       tls  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     30  1.27       tls  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     31  1.27       tls  * POSSIBILITY OF SUCH DAMAGE.
     32  1.27       tls  */
     33  1.27       tls 
     34   1.1  jonathan /*
     35   1.1  jonathan  * The author of this code is Angelos D. Keromytis (angelos (at) cis.upenn.edu)
     36   1.1  jonathan  *
     37   1.1  jonathan  * This code was written by Angelos D. Keromytis in Athens, Greece, in
     38   1.1  jonathan  * February 2000. Network Security Technologies Inc. (NSTI) kindly
     39   1.1  jonathan  * supported the development of this code.
     40   1.1  jonathan  *
     41   1.1  jonathan  * Copyright (c) 2000, 2001 Angelos D. Keromytis
     42   1.1  jonathan  *
     43   1.1  jonathan  * Permission to use, copy, and modify this software with or without fee
     44   1.1  jonathan  * is hereby granted, provided that this entire notice is included in
     45   1.1  jonathan  * all source code copies of any software which is or includes a copy or
     46   1.1  jonathan  * modification of this software.
     47   1.1  jonathan  *
     48   1.1  jonathan  * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
     49   1.1  jonathan  * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
     50   1.1  jonathan  * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
     51   1.1  jonathan  * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
     52   1.1  jonathan  * PURPOSE.
     53   1.1  jonathan  */
     54   1.1  jonathan 
     55   1.1  jonathan #include <sys/cdefs.h>
     56  1.74  knakahar __KERNEL_RCSID(0, "$NetBSD: crypto.c,v 1.74 2017/05/24 09:57:36 knakahara Exp $");
     57   1.1  jonathan 
     58   1.1  jonathan #include <sys/param.h>
     59   1.1  jonathan #include <sys/reboot.h>
     60   1.1  jonathan #include <sys/systm.h>
     61   1.1  jonathan #include <sys/malloc.h>
     62   1.1  jonathan #include <sys/proc.h>
     63   1.1  jonathan #include <sys/pool.h>
     64   1.1  jonathan #include <sys/kthread.h>
     65  1.11   thorpej #include <sys/once.h>
     66  1.13  christos #include <sys/sysctl.h>
     67  1.21        ad #include <sys/intr.h>
     68  1.42  pgoyette #include <sys/errno.h>
     69  1.42  pgoyette #include <sys/module.h>
     70   1.1  jonathan 
     71  1.42  pgoyette #if defined(_KERNEL_OPT)
     72  1.23       tls #include "opt_ocf.h"
     73  1.42  pgoyette #endif
     74  1.42  pgoyette 
     75  1.21        ad #include <opencrypto/cryptodev.h>
     76   1.1  jonathan #include <opencrypto/xform.h>			/* XXX for M_XDATA */
     77   1.1  jonathan 
     78  1.49  knakahar static kmutex_t crypto_q_mtx;
     79  1.49  knakahar static kmutex_t crypto_ret_q_mtx;
     80  1.49  knakahar static kcondvar_t cryptoret_cv;
     81  1.23       tls 
     82  1.23       tls /* below are kludges for residual code wrtitten to FreeBSD interfaces */
     83   1.1  jonathan   #define SWI_CRYPTO 17
     84   1.1  jonathan   #define register_swi(lvl, fn)  \
     85  1.38  drochner   softint_establish(SOFTINT_NET|SOFTINT_MPSAFE, (void (*)(void *))fn, NULL)
     86  1.21        ad   #define unregister_swi(lvl, fn)  softint_disestablish(softintr_cookie)
     87  1.56  knakahar   #define setsoftcrypto(x)			\
     88  1.56  knakahar 	do{					\
     89  1.56  knakahar 		kpreempt_disable();		\
     90  1.56  knakahar 		softint_schedule(x);		\
     91  1.56  knakahar 		kpreempt_enable();		\
     92  1.56  knakahar 	}while(0)
     93   1.1  jonathan 
     94  1.30    darran int crypto_ret_q_check(struct cryptop *);
     95  1.30    darran 
     96   1.1  jonathan /*
     97   1.1  jonathan  * Crypto drivers register themselves by allocating a slot in the
     98   1.1  jonathan  * crypto_drivers table with crypto_get_driverid() and then registering
     99   1.1  jonathan  * each algorithm they support with crypto_register() and crypto_kregister().
    100   1.1  jonathan  */
    101  1.57  knakahar static kmutex_t crypto_drv_mtx;
    102  1.11   thorpej static	struct cryptocap *crypto_drivers;
    103  1.11   thorpej static	int crypto_drivers_num;
    104  1.37  christos static	void *softintr_cookie;
    105  1.46  pgoyette static	int crypto_exit_flag;
    106   1.1  jonathan 
    107   1.1  jonathan /*
    108   1.1  jonathan  * There are two queues for crypto requests; one for symmetric (e.g.
    109   1.1  jonathan  * cipher) operations and one for asymmetric (e.g. MOD) operations.
    110   1.1  jonathan  * See below for how synchronization is handled.
    111   1.1  jonathan  */
    112  1.11   thorpej static	TAILQ_HEAD(,cryptop) crp_q =		/* request queues */
    113  1.11   thorpej 		TAILQ_HEAD_INITIALIZER(crp_q);
    114  1.11   thorpej static	TAILQ_HEAD(,cryptkop) crp_kq =
    115  1.11   thorpej 		TAILQ_HEAD_INITIALIZER(crp_kq);
    116   1.1  jonathan 
    117   1.1  jonathan /*
    118   1.1  jonathan  * There are two queues for processing completed crypto requests; one
    119   1.1  jonathan  * for the symmetric and one for the asymmetric ops.  We only need one
    120   1.1  jonathan  * but have two to avoid type futzing (cryptop vs. cryptkop).  See below
    121   1.1  jonathan  * for how synchronization is handled.
    122   1.1  jonathan  */
    123  1.23       tls static	TAILQ_HEAD(crprethead, cryptop) crp_ret_q =	/* callback queues */
    124  1.11   thorpej 		TAILQ_HEAD_INITIALIZER(crp_ret_q);
    125  1.23       tls static	TAILQ_HEAD(krprethead, cryptkop) crp_ret_kq =
    126  1.11   thorpej 		TAILQ_HEAD_INITIALIZER(crp_ret_kq);
    127   1.1  jonathan 
    128  1.73  knakahar #define DEFINIT_CRYPTO_Q_LEN(name)		\
    129  1.73  knakahar 	static int crypto_##name##_len = 0
    130  1.73  knakahar 
    131  1.73  knakahar #define DEFINIT_CRYPTO_Q_DROPS(name)		\
    132  1.73  knakahar 	static int crypto_##name##_drops = 0
    133  1.73  knakahar 
    134  1.73  knakahar #define CRYPTO_Q_MAXLEN 0
    135  1.73  knakahar #define DEFINIT_CRYPTO_Q_MAXLEN(name)				\
    136  1.73  knakahar 	static int crypto_##name##_maxlen = CRYPTO_Q_MAXLEN
    137  1.73  knakahar 
    138  1.73  knakahar #define CRYPTO_Q_INC(name)			\
    139  1.73  knakahar 	do {					\
    140  1.73  knakahar 		crypto_##name##_len++;		\
    141  1.73  knakahar 	} while(0);
    142  1.73  knakahar 
    143  1.73  knakahar #define CRYPTO_Q_DEC(name)			\
    144  1.73  knakahar 	do {					\
    145  1.73  knakahar 		crypto_##name##_len--;		\
    146  1.73  knakahar 	} while(0);
    147  1.73  knakahar 
    148  1.74  knakahar #define CRYPTO_Q_INC_DROPS(name)		\
    149  1.74  knakahar 	do {					\
    150  1.74  knakahar 		crypto_##name##_drops++;	\
    151  1.74  knakahar 	} while(0);
    152  1.74  knakahar 
    153  1.74  knakahar #define CRYPTO_Q_IS_FULL(name)					\
    154  1.74  knakahar 	(crypto_##name##_maxlen > 0				\
    155  1.74  knakahar 	    && (crypto_##name##_len > crypto_##name##_maxlen))
    156  1.74  knakahar 
    157  1.73  knakahar /*
    158  1.73  knakahar  * current queue length.
    159  1.73  knakahar  */
    160  1.73  knakahar DEFINIT_CRYPTO_Q_LEN(crp_ret_q);
    161  1.73  knakahar DEFINIT_CRYPTO_Q_LEN(crp_ret_kq);
    162  1.73  knakahar 
    163  1.73  knakahar /*
    164  1.73  knakahar  * queue dropped count.
    165  1.73  knakahar  */
    166  1.73  knakahar DEFINIT_CRYPTO_Q_DROPS(crp_ret_q);
    167  1.73  knakahar DEFINIT_CRYPTO_Q_DROPS(crp_ret_kq);
    168  1.73  knakahar 
    169  1.73  knakahar /*
    170  1.73  knakahar  * queue length limit.
    171  1.73  knakahar  * default value is 0. <=0 means unlimited.
    172  1.73  knakahar  */
    173  1.73  knakahar DEFINIT_CRYPTO_Q_MAXLEN(crp_ret_q);
    174  1.73  knakahar DEFINIT_CRYPTO_Q_MAXLEN(crp_ret_kq);
    175  1.73  knakahar 
    176  1.73  knakahar /*
    177  1.73  knakahar  * TODO:
    178  1.73  knakahar  * make percpu
    179  1.73  knakahar  */
    180  1.73  knakahar static int
    181  1.73  knakahar sysctl_opencrypto_q_len(SYSCTLFN_ARGS)
    182  1.73  knakahar {
    183  1.73  knakahar 	int error;
    184  1.73  knakahar 
    185  1.73  knakahar 	error = sysctl_lookup(SYSCTLFN_CALL(rnode));
    186  1.73  knakahar 	if (error || newp == NULL)
    187  1.73  knakahar 		return error;
    188  1.73  knakahar 
    189  1.73  knakahar 	return 0;
    190  1.73  knakahar }
    191  1.73  knakahar 
    192  1.73  knakahar /*
    193  1.73  knakahar  * TODO:
    194  1.73  knakahar  * make percpu
    195  1.73  knakahar  */
    196  1.73  knakahar static int
    197  1.73  knakahar sysctl_opencrypto_q_drops(SYSCTLFN_ARGS)
    198  1.73  knakahar {
    199  1.73  knakahar 	int error;
    200  1.73  knakahar 
    201  1.73  knakahar 	error = sysctl_lookup(SYSCTLFN_CALL(rnode));
    202  1.73  knakahar 	if (error || newp == NULL)
    203  1.73  knakahar 		return error;
    204  1.73  knakahar 
    205  1.73  knakahar 	return 0;
    206  1.73  knakahar }
    207  1.73  knakahar 
    208  1.73  knakahar /*
    209  1.73  knakahar  * need to make percpu?
    210  1.73  knakahar  */
    211  1.73  knakahar static int
    212  1.73  knakahar sysctl_opencrypto_q_maxlen(SYSCTLFN_ARGS)
    213  1.73  knakahar {
    214  1.73  knakahar 	int error;
    215  1.73  knakahar 
    216  1.73  knakahar 	error = sysctl_lookup(SYSCTLFN_CALL(rnode));
    217  1.73  knakahar 	if (error || newp == NULL)
    218  1.73  knakahar 		return error;
    219  1.73  knakahar 
    220  1.73  knakahar 	return 0;
    221  1.73  knakahar }
    222  1.73  knakahar 
    223   1.1  jonathan /*
    224   1.1  jonathan  * Crypto op and desciptor data structures are allocated
    225   1.1  jonathan  * from separate private zones(FreeBSD)/pools(netBSD/OpenBSD) .
    226   1.1  jonathan  */
    227   1.1  jonathan struct pool cryptop_pool;
    228   1.1  jonathan struct pool cryptodesc_pool;
    229  1.23       tls struct pool cryptkop_pool;
    230   1.1  jonathan 
    231   1.1  jonathan int	crypto_usercrypto = 1;		/* userland may open /dev/crypto */
    232   1.1  jonathan int	crypto_userasymcrypto = 1;	/* userland may do asym crypto reqs */
    233  1.10     perry /*
    234   1.6  jonathan  * cryptodevallowsoft is (intended to be) sysctl'able, controlling
    235   1.6  jonathan  * access to hardware versus software transforms as below:
    236   1.6  jonathan  *
    237   1.6  jonathan  * crypto_devallowsoft < 0:  Force userlevel requests to use software
    238   1.6  jonathan  *                              transforms, always
    239   1.6  jonathan  * crypto_devallowsoft = 0:  Use hardware if present, grant userlevel
    240   1.6  jonathan  *                              requests for non-accelerated transforms
    241   1.6  jonathan  *                              (handling the latter in software)
    242   1.6  jonathan  * crypto_devallowsoft > 0:  Allow user requests only for transforms which
    243   1.6  jonathan  *                               are hardware-accelerated.
    244   1.6  jonathan  */
    245   1.9  jonathan int	crypto_devallowsoft = 1;	/* only use hardware crypto */
    246   1.6  jonathan 
    247  1.72  knakahar static void
    248  1.72  knakahar sysctl_opencrypto_setup(struct sysctllog **clog)
    249  1.13  christos {
    250  1.73  knakahar 	const struct sysctlnode *ocnode;
    251  1.73  knakahar 	const struct sysctlnode *retqnode, *retkqnode;
    252  1.45     pooka 
    253  1.13  christos 	sysctl_createv(clog, 0, NULL, NULL,
    254  1.13  christos 		       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
    255  1.13  christos 		       CTLTYPE_INT, "usercrypto",
    256  1.13  christos 		       SYSCTL_DESCR("Enable/disable user-mode access to "
    257  1.13  christos 			   "crypto support"),
    258  1.13  christos 		       NULL, 0, &crypto_usercrypto, 0,
    259  1.13  christos 		       CTL_KERN, CTL_CREATE, CTL_EOL);
    260  1.13  christos 	sysctl_createv(clog, 0, NULL, NULL,
    261  1.13  christos 		       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
    262  1.13  christos 		       CTLTYPE_INT, "userasymcrypto",
    263  1.13  christos 		       SYSCTL_DESCR("Enable/disable user-mode access to "
    264  1.13  christos 			   "asymmetric crypto support"),
    265  1.13  christos 		       NULL, 0, &crypto_userasymcrypto, 0,
    266  1.13  christos 		       CTL_KERN, CTL_CREATE, CTL_EOL);
    267  1.13  christos 	sysctl_createv(clog, 0, NULL, NULL,
    268  1.13  christos 		       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
    269  1.13  christos 		       CTLTYPE_INT, "cryptodevallowsoft",
    270  1.13  christos 		       SYSCTL_DESCR("Enable/disable use of software "
    271  1.13  christos 			   "asymmetric crypto support"),
    272  1.13  christos 		       NULL, 0, &crypto_devallowsoft, 0,
    273  1.13  christos 		       CTL_KERN, CTL_CREATE, CTL_EOL);
    274  1.73  knakahar 
    275  1.73  knakahar 	sysctl_createv(clog, 0, NULL, &ocnode,
    276  1.73  knakahar 		       CTLFLAG_PERMANENT,
    277  1.73  knakahar 		       CTLTYPE_NODE, "opencrypto",
    278  1.73  knakahar 		       SYSCTL_DESCR("opencrypto related entries"),
    279  1.73  knakahar 		       NULL, 0, NULL, 0,
    280  1.73  knakahar 		       CTL_CREATE, CTL_EOL);
    281  1.73  knakahar 
    282  1.73  knakahar 	sysctl_createv(clog, 0, &ocnode, &retqnode,
    283  1.73  knakahar 		       CTLFLAG_PERMANENT,
    284  1.73  knakahar 		       CTLTYPE_NODE, "crypto_ret_q",
    285  1.73  knakahar 		       SYSCTL_DESCR("crypto_ret_q related entries"),
    286  1.73  knakahar 		       NULL, 0, NULL, 0,
    287  1.73  knakahar 		       CTL_CREATE, CTL_EOL);
    288  1.73  knakahar 	sysctl_createv(clog, 0, &retqnode, NULL,
    289  1.73  knakahar 		       CTLFLAG_PERMANENT|CTLFLAG_READONLY,
    290  1.73  knakahar 		       CTLTYPE_INT, "len",
    291  1.73  knakahar 		       SYSCTL_DESCR("Current queue length"),
    292  1.73  knakahar 		       sysctl_opencrypto_q_len, 0,
    293  1.73  knakahar 		       (void *)&crypto_crp_ret_q_len, 0,
    294  1.73  knakahar 		       CTL_CREATE, CTL_EOL);
    295  1.73  knakahar 	sysctl_createv(clog, 0, &retqnode, NULL,
    296  1.73  knakahar 		       CTLFLAG_PERMANENT|CTLFLAG_READONLY,
    297  1.73  knakahar 		       CTLTYPE_INT, "drops",
    298  1.73  knakahar 		       SYSCTL_DESCR("Crypto requests dropped due to full ret queue"),
    299  1.73  knakahar 		       sysctl_opencrypto_q_drops, 0,
    300  1.73  knakahar 		       (void *)&crypto_crp_ret_q_drops, 0,
    301  1.73  knakahar 		       CTL_CREATE, CTL_EOL);
    302  1.73  knakahar 	sysctl_createv(clog, 0, &retqnode, NULL,
    303  1.73  knakahar 		       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
    304  1.73  knakahar 		       CTLTYPE_INT, "maxlen",
    305  1.73  knakahar 		       SYSCTL_DESCR("Maximum allowed queue length"),
    306  1.73  knakahar 		       sysctl_opencrypto_q_maxlen, 0,
    307  1.73  knakahar 		       (void *)&crypto_crp_ret_q_maxlen, 0,
    308  1.73  knakahar 		       CTL_CREATE, CTL_EOL);
    309  1.73  knakahar 
    310  1.73  knakahar 	sysctl_createv(clog, 0, &ocnode, &retkqnode,
    311  1.73  knakahar 		       CTLFLAG_PERMANENT,
    312  1.73  knakahar 		       CTLTYPE_NODE, "crypto_ret_kq",
    313  1.73  knakahar 		       SYSCTL_DESCR("crypto_ret_kq related entries"),
    314  1.73  knakahar 		       NULL, 0, NULL, 0,
    315  1.73  knakahar 		       CTL_CREATE, CTL_EOL);
    316  1.73  knakahar 	sysctl_createv(clog, 0, &retkqnode, NULL,
    317  1.73  knakahar 		       CTLFLAG_PERMANENT|CTLFLAG_READONLY,
    318  1.73  knakahar 		       CTLTYPE_INT, "len",
    319  1.73  knakahar 		       SYSCTL_DESCR("Current queue length"),
    320  1.73  knakahar 		       sysctl_opencrypto_q_len, 0,
    321  1.73  knakahar 		       (void *)&crypto_crp_ret_kq_len, 0,
    322  1.73  knakahar 		       CTL_CREATE, CTL_EOL);
    323  1.73  knakahar 	sysctl_createv(clog, 0, &retkqnode, NULL,
    324  1.73  knakahar 		       CTLFLAG_PERMANENT|CTLFLAG_READONLY,
    325  1.73  knakahar 		       CTLTYPE_INT, "drops",
    326  1.73  knakahar 		       SYSCTL_DESCR("Crypto requests dropped due to full ret queue"),
    327  1.73  knakahar 		       sysctl_opencrypto_q_drops, 0,
    328  1.73  knakahar 		       (void *)&crypto_crp_ret_kq_drops, 0,
    329  1.73  knakahar 		       CTL_CREATE, CTL_EOL);
    330  1.73  knakahar 	sysctl_createv(clog, 0, &retkqnode, NULL,
    331  1.73  knakahar 		       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
    332  1.73  knakahar 		       CTLTYPE_INT, "maxlen",
    333  1.73  knakahar 		       SYSCTL_DESCR("Maximum allowed queue length"),
    334  1.73  knakahar 		       sysctl_opencrypto_q_maxlen, 0,
    335  1.73  knakahar 		       (void *)&crypto_crp_ret_kq_maxlen, 0,
    336  1.73  knakahar 		       CTL_CREATE, CTL_EOL);
    337  1.13  christos }
    338   1.1  jonathan 
    339   1.1  jonathan MALLOC_DEFINE(M_CRYPTO_DATA, "crypto", "crypto session records");
    340   1.1  jonathan 
    341   1.1  jonathan /*
    342   1.1  jonathan  * Synchronization: read carefully, this is non-trivial.
    343   1.1  jonathan  *
    344   1.1  jonathan  * Crypto requests are submitted via crypto_dispatch.  Typically
    345   1.1  jonathan  * these come in from network protocols at spl0 (output path) or
    346   1.1  jonathan  * spl[,soft]net (input path).
    347   1.1  jonathan  *
    348   1.1  jonathan  * Requests are typically passed on the driver directly, but they
    349   1.1  jonathan  * may also be queued for processing by a software interrupt thread,
    350  1.10     perry  * cryptointr, that runs at splsoftcrypto.  This thread dispatches
    351   1.1  jonathan  * the requests to crypto drivers (h/w or s/w) who call crypto_done
    352   1.1  jonathan  * when a request is complete.  Hardware crypto drivers are assumed
    353   1.1  jonathan  * to register their IRQ's as network devices so their interrupt handlers
    354   1.1  jonathan  * and subsequent "done callbacks" happen at spl[imp,net].
    355   1.1  jonathan  *
    356   1.1  jonathan  * Completed crypto ops are queued for a separate kernel thread that
    357   1.1  jonathan  * handles the callbacks at spl0.  This decoupling insures the crypto
    358   1.1  jonathan  * driver interrupt service routine is not delayed while the callback
    359   1.1  jonathan  * takes place and that callbacks are delivered after a context switch
    360   1.1  jonathan  * (as opposed to a software interrupt that clients must block).
    361   1.1  jonathan  *
    362   1.1  jonathan  * This scheme is not intended for SMP machines.
    363  1.10     perry  */
    364   1.1  jonathan static	void cryptointr(void);		/* swi thread to dispatch ops */
    365   1.1  jonathan static	void cryptoret(void);		/* kernel thread for callbacks*/
    366  1.20        ad static	struct lwp *cryptothread;
    367  1.46  pgoyette static	int crypto_destroy(bool);
    368   1.1  jonathan static	int crypto_invoke(struct cryptop *crp, int hint);
    369   1.1  jonathan static	int crypto_kinvoke(struct cryptkop *krp, int hint);
    370   1.1  jonathan 
    371   1.1  jonathan static struct cryptostats cryptostats;
    372  1.23       tls #ifdef CRYPTO_TIMING
    373   1.1  jonathan static	int crypto_timing = 0;
    374  1.23       tls #endif
    375   1.1  jonathan 
    376  1.47  christos static struct sysctllog *sysctl_opencrypto_clog;
    377  1.44  pgoyette 
    378  1.12      yamt static int
    379  1.11   thorpej crypto_init0(void)
    380   1.1  jonathan {
    381   1.1  jonathan 	int error;
    382   1.1  jonathan 
    383  1.57  knakahar 	mutex_init(&crypto_drv_mtx, MUTEX_DEFAULT, IPL_NONE);
    384  1.40  drochner 	mutex_init(&crypto_q_mtx, MUTEX_DEFAULT, IPL_NET);
    385  1.40  drochner 	mutex_init(&crypto_ret_q_mtx, MUTEX_DEFAULT, IPL_NET);
    386  1.36  pgoyette 	cv_init(&cryptoret_cv, "crypto_w");
    387  1.23       tls 	pool_init(&cryptop_pool, sizeof(struct cryptop), 0, 0,
    388  1.48   msaitoh 		  0, "cryptop", NULL, IPL_NET);
    389  1.23       tls 	pool_init(&cryptodesc_pool, sizeof(struct cryptodesc), 0, 0,
    390  1.23       tls 		  0, "cryptodesc", NULL, IPL_NET);
    391  1.23       tls 	pool_init(&cryptkop_pool, sizeof(struct cryptkop), 0, 0,
    392  1.23       tls 		  0, "cryptkop", NULL, IPL_NET);
    393   1.1  jonathan 
    394  1.11   thorpej 	crypto_drivers = malloc(CRYPTO_DRIVERS_INITIAL *
    395   1.1  jonathan 	    sizeof(struct cryptocap), M_CRYPTO_DATA, M_NOWAIT | M_ZERO);
    396   1.1  jonathan 	if (crypto_drivers == NULL) {
    397   1.1  jonathan 		printf("crypto_init: cannot malloc driver table\n");
    398  1.46  pgoyette 		return ENOMEM;
    399   1.1  jonathan 	}
    400  1.11   thorpej 	crypto_drivers_num = CRYPTO_DRIVERS_INITIAL;
    401   1.1  jonathan 
    402   1.1  jonathan 	softintr_cookie = register_swi(SWI_CRYPTO, cryptointr);
    403  1.25       tls 	error = kthread_create(PRI_NONE, KTHREAD_MPSAFE, NULL,
    404  1.37  christos 	    (void (*)(void *))cryptoret, NULL, &cryptothread, "cryptoret");
    405   1.1  jonathan 	if (error) {
    406   1.1  jonathan 		printf("crypto_init: cannot start cryptoret thread; error %d",
    407   1.1  jonathan 			error);
    408  1.46  pgoyette 		return crypto_destroy(false);
    409   1.1  jonathan 	}
    410  1.20        ad 
    411  1.44  pgoyette 	sysctl_opencrypto_setup(&sysctl_opencrypto_clog);
    412  1.72  knakahar 
    413  1.12      yamt 	return 0;
    414  1.11   thorpej }
    415  1.11   thorpej 
    416  1.46  pgoyette int
    417  1.11   thorpej crypto_init(void)
    418  1.11   thorpej {
    419  1.18    daniel 	static ONCE_DECL(crypto_init_once);
    420  1.11   thorpej 
    421  1.46  pgoyette 	return RUN_ONCE(&crypto_init_once, crypto_init0);
    422   1.1  jonathan }
    423   1.1  jonathan 
    424  1.46  pgoyette static int
    425  1.46  pgoyette crypto_destroy(bool exit_kthread)
    426   1.1  jonathan {
    427  1.46  pgoyette 	int i;
    428  1.46  pgoyette 
    429  1.46  pgoyette 	if (exit_kthread) {
    430  1.46  pgoyette 		mutex_spin_enter(&crypto_ret_q_mtx);
    431  1.46  pgoyette 
    432  1.46  pgoyette 		/* if we have any in-progress requests, don't unload */
    433  1.51  knakahar 		if (!TAILQ_EMPTY(&crp_q) || !TAILQ_EMPTY(&crp_kq)) {
    434  1.51  knakahar 			mutex_spin_exit(&crypto_ret_q_mtx);
    435  1.46  pgoyette 			return EBUSY;
    436  1.51  knakahar 		}
    437  1.46  pgoyette 
    438  1.46  pgoyette 		for (i = 0; i < crypto_drivers_num; i++)
    439  1.46  pgoyette 			if (crypto_drivers[i].cc_sessions != 0)
    440  1.46  pgoyette 				break;
    441  1.51  knakahar 		if (i < crypto_drivers_num) {
    442  1.51  knakahar 			mutex_spin_exit(&crypto_ret_q_mtx);
    443  1.46  pgoyette 			return EBUSY;
    444  1.51  knakahar 		}
    445  1.46  pgoyette 
    446  1.46  pgoyette 		/* kick the cryptoret thread and wait for it to exit */
    447  1.46  pgoyette 		crypto_exit_flag = 1;
    448  1.46  pgoyette 		cv_signal(&cryptoret_cv);
    449  1.46  pgoyette 
    450  1.46  pgoyette 		while (crypto_exit_flag != 0)
    451  1.46  pgoyette 			cv_wait(&cryptoret_cv, &crypto_ret_q_mtx);
    452  1.46  pgoyette 		mutex_spin_exit(&crypto_ret_q_mtx);
    453  1.46  pgoyette 	}
    454  1.46  pgoyette 
    455  1.46  pgoyette 	if (sysctl_opencrypto_clog != NULL)
    456  1.46  pgoyette 		sysctl_teardown(&sysctl_opencrypto_clog);
    457  1.46  pgoyette 
    458  1.46  pgoyette 	unregister_swi(SWI_CRYPTO, cryptointr);
    459  1.46  pgoyette 
    460  1.57  knakahar 	mutex_enter(&crypto_drv_mtx);
    461   1.1  jonathan 	if (crypto_drivers != NULL)
    462   1.1  jonathan 		free(crypto_drivers, M_CRYPTO_DATA);
    463  1.57  knakahar 	mutex_exit(&crypto_drv_mtx);
    464  1.46  pgoyette 
    465  1.46  pgoyette 	pool_destroy(&cryptop_pool);
    466  1.46  pgoyette 	pool_destroy(&cryptodesc_pool);
    467  1.46  pgoyette 	pool_destroy(&cryptkop_pool);
    468  1.46  pgoyette 
    469  1.46  pgoyette 	cv_destroy(&cryptoret_cv);
    470  1.46  pgoyette 
    471  1.46  pgoyette 	mutex_destroy(&crypto_ret_q_mtx);
    472  1.46  pgoyette 	mutex_destroy(&crypto_q_mtx);
    473  1.57  knakahar 	mutex_destroy(&crypto_drv_mtx);
    474  1.46  pgoyette 
    475  1.46  pgoyette 	return 0;
    476   1.1  jonathan }
    477   1.1  jonathan 
    478   1.1  jonathan /*
    479  1.57  knakahar  * Create a new session.
    480   1.1  jonathan  */
    481   1.1  jonathan int
    482   1.1  jonathan crypto_newsession(u_int64_t *sid, struct cryptoini *cri, int hard)
    483   1.1  jonathan {
    484   1.1  jonathan 	struct cryptoini *cr;
    485   1.1  jonathan 	u_int32_t hid, lid;
    486   1.1  jonathan 	int err = EINVAL;
    487   1.1  jonathan 
    488  1.57  knakahar 	mutex_enter(&crypto_drv_mtx);
    489   1.1  jonathan 
    490   1.1  jonathan 	if (crypto_drivers == NULL)
    491   1.1  jonathan 		goto done;
    492   1.1  jonathan 
    493   1.1  jonathan 	/*
    494   1.1  jonathan 	 * The algorithm we use here is pretty stupid; just use the
    495   1.1  jonathan 	 * first driver that supports all the algorithms we need.
    496   1.1  jonathan 	 *
    497   1.1  jonathan 	 * XXX We need more smarts here (in real life too, but that's
    498   1.1  jonathan 	 * XXX another story altogether).
    499   1.1  jonathan 	 */
    500   1.1  jonathan 
    501   1.1  jonathan 	for (hid = 0; hid < crypto_drivers_num; hid++) {
    502   1.1  jonathan 		/*
    503   1.1  jonathan 		 * If it's not initialized or has remaining sessions
    504   1.1  jonathan 		 * referencing it, skip.
    505   1.1  jonathan 		 */
    506   1.1  jonathan 		if (crypto_drivers[hid].cc_newsession == NULL ||
    507   1.1  jonathan 		    (crypto_drivers[hid].cc_flags & CRYPTOCAP_F_CLEANUP))
    508   1.1  jonathan 			continue;
    509   1.1  jonathan 
    510   1.1  jonathan 		/* Hardware required -- ignore software drivers. */
    511   1.1  jonathan 		if (hard > 0 &&
    512   1.1  jonathan 		    (crypto_drivers[hid].cc_flags & CRYPTOCAP_F_SOFTWARE))
    513   1.1  jonathan 			continue;
    514   1.1  jonathan 		/* Software required -- ignore hardware drivers. */
    515   1.1  jonathan 		if (hard < 0 &&
    516   1.1  jonathan 		    (crypto_drivers[hid].cc_flags & CRYPTOCAP_F_SOFTWARE) == 0)
    517   1.1  jonathan 			continue;
    518   1.1  jonathan 
    519   1.1  jonathan 		/* See if all the algorithms are supported. */
    520   1.1  jonathan 		for (cr = cri; cr; cr = cr->cri_next)
    521  1.33    darran 			if (crypto_drivers[hid].cc_alg[cr->cri_alg] == 0) {
    522  1.64  knakahar 				DPRINTF("alg %d not supported\n", cr->cri_alg);
    523   1.1  jonathan 				break;
    524  1.33    darran 			}
    525   1.1  jonathan 
    526   1.1  jonathan 		if (cr == NULL) {
    527   1.1  jonathan 			/* Ok, all algorithms are supported. */
    528   1.1  jonathan 
    529   1.1  jonathan 			/*
    530   1.1  jonathan 			 * Can't do everything in one session.
    531   1.1  jonathan 			 *
    532   1.1  jonathan 			 * XXX Fix this. We need to inject a "virtual" session layer right
    533   1.1  jonathan 			 * XXX about here.
    534   1.1  jonathan 			 */
    535   1.1  jonathan 
    536   1.1  jonathan 			/* Call the driver initialization routine. */
    537   1.1  jonathan 			lid = hid;		/* Pass the driver ID. */
    538   1.1  jonathan 			err = crypto_drivers[hid].cc_newsession(
    539   1.1  jonathan 					crypto_drivers[hid].cc_arg, &lid, cri);
    540   1.1  jonathan 			if (err == 0) {
    541   1.1  jonathan 				(*sid) = hid;
    542   1.1  jonathan 				(*sid) <<= 32;
    543   1.1  jonathan 				(*sid) |= (lid & 0xffffffff);
    544   1.1  jonathan 				crypto_drivers[hid].cc_sessions++;
    545  1.52  knakahar 			} else {
    546  1.64  knakahar 				DPRINTF("crypto_drivers[%d].cc_newsession() failed. error=%d\n",
    547  1.64  knakahar 					hid, err);
    548   1.1  jonathan 			}
    549   1.1  jonathan 			goto done;
    550   1.1  jonathan 			/*break;*/
    551   1.1  jonathan 		}
    552   1.1  jonathan 	}
    553   1.1  jonathan done:
    554  1.57  knakahar 	mutex_exit(&crypto_drv_mtx);
    555   1.1  jonathan 	return err;
    556   1.1  jonathan }
    557   1.1  jonathan 
    558   1.1  jonathan /*
    559   1.1  jonathan  * Delete an existing session (or a reserved session on an unregistered
    560  1.57  knakahar  * driver).
    561   1.1  jonathan  */
    562   1.1  jonathan int
    563   1.1  jonathan crypto_freesession(u_int64_t sid)
    564   1.1  jonathan {
    565   1.1  jonathan 	u_int32_t hid;
    566   1.1  jonathan 	int err = 0;
    567   1.1  jonathan 
    568  1.57  knakahar 	mutex_enter(&crypto_drv_mtx);
    569   1.1  jonathan 
    570   1.1  jonathan 	if (crypto_drivers == NULL) {
    571   1.1  jonathan 		err = EINVAL;
    572   1.1  jonathan 		goto done;
    573   1.1  jonathan 	}
    574   1.1  jonathan 
    575   1.1  jonathan 	/* Determine two IDs. */
    576  1.35  jakllsch 	hid = CRYPTO_SESID2HID(sid);
    577   1.1  jonathan 
    578   1.1  jonathan 	if (hid >= crypto_drivers_num) {
    579   1.1  jonathan 		err = ENOENT;
    580   1.1  jonathan 		goto done;
    581   1.1  jonathan 	}
    582   1.1  jonathan 
    583   1.1  jonathan 	if (crypto_drivers[hid].cc_sessions)
    584   1.1  jonathan 		crypto_drivers[hid].cc_sessions--;
    585   1.1  jonathan 
    586   1.1  jonathan 	/* Call the driver cleanup routine, if available. */
    587  1.23       tls 	if (crypto_drivers[hid].cc_freesession) {
    588   1.1  jonathan 		err = crypto_drivers[hid].cc_freesession(
    589   1.1  jonathan 				crypto_drivers[hid].cc_arg, sid);
    590  1.23       tls 	}
    591   1.1  jonathan 	else
    592   1.1  jonathan 		err = 0;
    593   1.1  jonathan 
    594   1.1  jonathan 	/*
    595   1.1  jonathan 	 * If this was the last session of a driver marked as invalid,
    596   1.1  jonathan 	 * make the entry available for reuse.
    597   1.1  jonathan 	 */
    598   1.1  jonathan 	if ((crypto_drivers[hid].cc_flags & CRYPTOCAP_F_CLEANUP) &&
    599   1.1  jonathan 	    crypto_drivers[hid].cc_sessions == 0)
    600  1.31    cegger 		memset(&crypto_drivers[hid], 0, sizeof(struct cryptocap));
    601   1.1  jonathan 
    602   1.1  jonathan done:
    603  1.57  knakahar 	mutex_exit(&crypto_drv_mtx);
    604   1.1  jonathan 	return err;
    605   1.1  jonathan }
    606   1.1  jonathan 
    607   1.1  jonathan /*
    608   1.1  jonathan  * Return an unused driver id.  Used by drivers prior to registering
    609   1.1  jonathan  * support for the algorithms they handle.
    610   1.1  jonathan  */
    611   1.1  jonathan int32_t
    612   1.1  jonathan crypto_get_driverid(u_int32_t flags)
    613   1.1  jonathan {
    614   1.1  jonathan 	struct cryptocap *newdrv;
    615  1.23       tls 	int i;
    616   1.1  jonathan 
    617  1.46  pgoyette 	(void)crypto_init();		/* XXX oh, this is foul! */
    618  1.11   thorpej 
    619  1.57  knakahar 	mutex_enter(&crypto_drv_mtx);
    620   1.1  jonathan 	for (i = 0; i < crypto_drivers_num; i++)
    621   1.1  jonathan 		if (crypto_drivers[i].cc_process == NULL &&
    622   1.1  jonathan 		    (crypto_drivers[i].cc_flags & CRYPTOCAP_F_CLEANUP) == 0 &&
    623   1.1  jonathan 		    crypto_drivers[i].cc_sessions == 0)
    624   1.1  jonathan 			break;
    625   1.1  jonathan 
    626   1.1  jonathan 	/* Out of entries, allocate some more. */
    627   1.1  jonathan 	if (i == crypto_drivers_num) {
    628   1.1  jonathan 		/* Be careful about wrap-around. */
    629   1.1  jonathan 		if (2 * crypto_drivers_num <= crypto_drivers_num) {
    630  1.57  knakahar 			mutex_exit(&crypto_drv_mtx);
    631   1.1  jonathan 			printf("crypto: driver count wraparound!\n");
    632   1.1  jonathan 			return -1;
    633   1.1  jonathan 		}
    634   1.1  jonathan 
    635   1.1  jonathan 		newdrv = malloc(2 * crypto_drivers_num *
    636   1.1  jonathan 		    sizeof(struct cryptocap), M_CRYPTO_DATA, M_NOWAIT|M_ZERO);
    637   1.1  jonathan 		if (newdrv == NULL) {
    638  1.57  knakahar 			mutex_exit(&crypto_drv_mtx);
    639   1.1  jonathan 			printf("crypto: no space to expand driver table!\n");
    640   1.1  jonathan 			return -1;
    641   1.1  jonathan 		}
    642   1.1  jonathan 
    643  1.34   tsutsui 		memcpy(newdrv, crypto_drivers,
    644   1.1  jonathan 		    crypto_drivers_num * sizeof(struct cryptocap));
    645   1.1  jonathan 
    646   1.1  jonathan 		crypto_drivers_num *= 2;
    647   1.1  jonathan 
    648   1.1  jonathan 		free(crypto_drivers, M_CRYPTO_DATA);
    649   1.1  jonathan 		crypto_drivers = newdrv;
    650   1.1  jonathan 	}
    651   1.1  jonathan 
    652   1.1  jonathan 	/* NB: state is zero'd on free */
    653   1.1  jonathan 	crypto_drivers[i].cc_sessions = 1;	/* Mark */
    654   1.1  jonathan 	crypto_drivers[i].cc_flags = flags;
    655   1.1  jonathan 
    656   1.1  jonathan 	if (bootverbose)
    657   1.1  jonathan 		printf("crypto: assign driver %u, flags %u\n", i, flags);
    658   1.1  jonathan 
    659  1.57  knakahar 	mutex_exit(&crypto_drv_mtx);
    660   1.1  jonathan 
    661   1.1  jonathan 	return i;
    662   1.1  jonathan }
    663   1.1  jonathan 
    664   1.1  jonathan static struct cryptocap *
    665   1.1  jonathan crypto_checkdriver(u_int32_t hid)
    666   1.1  jonathan {
    667   1.1  jonathan 	if (crypto_drivers == NULL)
    668   1.1  jonathan 		return NULL;
    669   1.1  jonathan 	return (hid >= crypto_drivers_num ? NULL : &crypto_drivers[hid]);
    670   1.1  jonathan }
    671   1.1  jonathan 
    672   1.1  jonathan /*
    673   1.1  jonathan  * Register support for a key-related algorithm.  This routine
    674   1.1  jonathan  * is called once for each algorithm supported a driver.
    675   1.1  jonathan  */
    676   1.1  jonathan int
    677   1.1  jonathan crypto_kregister(u_int32_t driverid, int kalg, u_int32_t flags,
    678  1.37  christos     int (*kprocess)(void *, struct cryptkop *, int),
    679   1.1  jonathan     void *karg)
    680   1.1  jonathan {
    681   1.1  jonathan 	struct cryptocap *cap;
    682   1.1  jonathan 	int err;
    683   1.1  jonathan 
    684  1.57  knakahar 	mutex_enter(&crypto_drv_mtx);
    685   1.1  jonathan 
    686   1.1  jonathan 	cap = crypto_checkdriver(driverid);
    687   1.1  jonathan 	if (cap != NULL &&
    688   1.1  jonathan 	    (CRK_ALGORITM_MIN <= kalg && kalg <= CRK_ALGORITHM_MAX)) {
    689   1.1  jonathan 		/*
    690   1.1  jonathan 		 * XXX Do some performance testing to determine placing.
    691   1.1  jonathan 		 * XXX We probably need an auxiliary data structure that
    692   1.1  jonathan 		 * XXX describes relative performances.
    693   1.1  jonathan 		 */
    694   1.1  jonathan 
    695   1.1  jonathan 		cap->cc_kalg[kalg] = flags | CRYPTO_ALG_FLAG_SUPPORTED;
    696  1.23       tls 		if (bootverbose) {
    697  1.23       tls 			printf("crypto: driver %u registers key alg %u "
    698  1.23       tls 			       " flags %u\n",
    699  1.23       tls 				driverid,
    700  1.23       tls 				kalg,
    701  1.23       tls 				flags
    702   1.1  jonathan 			);
    703  1.23       tls 		}
    704   1.1  jonathan 
    705   1.1  jonathan 		if (cap->cc_kprocess == NULL) {
    706   1.1  jonathan 			cap->cc_karg = karg;
    707   1.1  jonathan 			cap->cc_kprocess = kprocess;
    708   1.1  jonathan 		}
    709   1.1  jonathan 		err = 0;
    710   1.1  jonathan 	} else
    711   1.1  jonathan 		err = EINVAL;
    712   1.1  jonathan 
    713  1.57  knakahar 	mutex_exit(&crypto_drv_mtx);
    714   1.1  jonathan 	return err;
    715   1.1  jonathan }
    716   1.1  jonathan 
    717   1.1  jonathan /*
    718   1.1  jonathan  * Register support for a non-key-related algorithm.  This routine
    719   1.1  jonathan  * is called once for each such algorithm supported by a driver.
    720   1.1  jonathan  */
    721   1.1  jonathan int
    722   1.1  jonathan crypto_register(u_int32_t driverid, int alg, u_int16_t maxoplen,
    723   1.1  jonathan     u_int32_t flags,
    724  1.37  christos     int (*newses)(void *, u_int32_t*, struct cryptoini*),
    725  1.37  christos     int (*freeses)(void *, u_int64_t),
    726  1.37  christos     int (*process)(void *, struct cryptop *, int),
    727   1.1  jonathan     void *arg)
    728   1.1  jonathan {
    729   1.1  jonathan 	struct cryptocap *cap;
    730  1.23       tls 	int err;
    731   1.1  jonathan 
    732  1.57  knakahar 	mutex_enter(&crypto_drv_mtx);
    733   1.1  jonathan 
    734   1.1  jonathan 	cap = crypto_checkdriver(driverid);
    735   1.1  jonathan 	/* NB: algorithms are in the range [1..max] */
    736   1.1  jonathan 	if (cap != NULL &&
    737   1.1  jonathan 	    (CRYPTO_ALGORITHM_MIN <= alg && alg <= CRYPTO_ALGORITHM_MAX)) {
    738   1.1  jonathan 		/*
    739   1.1  jonathan 		 * XXX Do some performance testing to determine placing.
    740   1.1  jonathan 		 * XXX We probably need an auxiliary data structure that
    741   1.1  jonathan 		 * XXX describes relative performances.
    742   1.1  jonathan 		 */
    743   1.1  jonathan 
    744   1.1  jonathan 		cap->cc_alg[alg] = flags | CRYPTO_ALG_FLAG_SUPPORTED;
    745   1.1  jonathan 		cap->cc_max_op_len[alg] = maxoplen;
    746  1.23       tls 		if (bootverbose) {
    747  1.23       tls 			printf("crypto: driver %u registers alg %u "
    748  1.23       tls 				"flags %u maxoplen %u\n",
    749  1.23       tls 				driverid,
    750  1.23       tls 				alg,
    751  1.23       tls 				flags,
    752  1.23       tls 				maxoplen
    753   1.1  jonathan 			);
    754  1.23       tls 		}
    755   1.1  jonathan 
    756   1.1  jonathan 		if (cap->cc_process == NULL) {
    757   1.1  jonathan 			cap->cc_arg = arg;
    758   1.1  jonathan 			cap->cc_newsession = newses;
    759   1.1  jonathan 			cap->cc_process = process;
    760   1.1  jonathan 			cap->cc_freesession = freeses;
    761   1.1  jonathan 			cap->cc_sessions = 0;		/* Unmark */
    762   1.1  jonathan 		}
    763   1.1  jonathan 		err = 0;
    764   1.1  jonathan 	} else
    765   1.1  jonathan 		err = EINVAL;
    766   1.1  jonathan 
    767  1.57  knakahar 	mutex_exit(&crypto_drv_mtx);
    768   1.1  jonathan 	return err;
    769   1.1  jonathan }
    770   1.1  jonathan 
    771  1.61  knakahar static int
    772  1.62  knakahar crypto_unregister_locked(u_int32_t driverid, int alg, bool all)
    773  1.61  knakahar {
    774  1.61  knakahar 	int i;
    775  1.61  knakahar 	u_int32_t ses;
    776  1.61  knakahar 	struct cryptocap *cap;
    777  1.61  knakahar 	bool lastalg = true;
    778  1.61  knakahar 
    779  1.61  knakahar 	KASSERT(mutex_owned(&crypto_drv_mtx));
    780  1.61  knakahar 
    781  1.61  knakahar 	if (CRYPTO_ALGORITHM_MIN <= alg && alg <= CRYPTO_ALGORITHM_MAX)
    782  1.61  knakahar 		return EINVAL;
    783  1.61  knakahar 
    784  1.61  knakahar 	cap = crypto_checkdriver(driverid);
    785  1.62  knakahar 	if (cap == NULL || (!all && cap->cc_alg[alg] == 0))
    786  1.61  knakahar 		return EINVAL;
    787  1.61  knakahar 
    788  1.61  knakahar 	cap->cc_alg[alg] = 0;
    789  1.61  knakahar 	cap->cc_max_op_len[alg] = 0;
    790  1.61  knakahar 
    791  1.62  knakahar 	if (all) {
    792  1.62  knakahar 		if (alg != CRYPTO_ALGORITHM_MAX)
    793  1.61  knakahar 			lastalg = false;
    794  1.62  knakahar 	} else {
    795  1.62  knakahar 		/* Was this the last algorithm ? */
    796  1.62  knakahar 		for (i = CRYPTO_ALGORITHM_MIN; i <= CRYPTO_ALGORITHM_MAX; i++)
    797  1.62  knakahar 			if (cap->cc_alg[i] != 0) {
    798  1.62  knakahar 				lastalg = false;
    799  1.62  knakahar 				break;
    800  1.62  knakahar 			}
    801  1.62  knakahar 	}
    802  1.61  knakahar 	if (lastalg) {
    803  1.61  knakahar 		ses = cap->cc_sessions;
    804  1.61  knakahar 		memset(cap, 0, sizeof(struct cryptocap));
    805  1.61  knakahar 		if (ses != 0) {
    806  1.61  knakahar 			/*
    807  1.61  knakahar 			 * If there are pending sessions, just mark as invalid.
    808  1.61  knakahar 			 */
    809  1.61  knakahar 			cap->cc_flags |= CRYPTOCAP_F_CLEANUP;
    810  1.61  knakahar 			cap->cc_sessions = ses;
    811  1.61  knakahar 		}
    812  1.61  knakahar 	}
    813  1.61  knakahar 
    814  1.61  knakahar 	return 0;
    815  1.61  knakahar }
    816  1.61  knakahar 
    817   1.1  jonathan /*
    818   1.1  jonathan  * Unregister a crypto driver. If there are pending sessions using it,
    819   1.1  jonathan  * leave enough information around so that subsequent calls using those
    820   1.1  jonathan  * sessions will correctly detect the driver has been unregistered and
    821   1.1  jonathan  * reroute requests.
    822   1.1  jonathan  */
    823   1.1  jonathan int
    824   1.1  jonathan crypto_unregister(u_int32_t driverid, int alg)
    825   1.1  jonathan {
    826  1.61  knakahar 	int err;
    827   1.1  jonathan 
    828  1.57  knakahar 	mutex_enter(&crypto_drv_mtx);
    829  1.62  knakahar 	err = crypto_unregister_locked(driverid, alg, false);
    830  1.61  knakahar 	mutex_exit(&crypto_drv_mtx);
    831   1.1  jonathan 
    832   1.1  jonathan 	return err;
    833   1.1  jonathan }
    834   1.1  jonathan 
    835   1.1  jonathan /*
    836   1.1  jonathan  * Unregister all algorithms associated with a crypto driver.
    837   1.1  jonathan  * If there are pending sessions using it, leave enough information
    838   1.1  jonathan  * around so that subsequent calls using those sessions will
    839   1.1  jonathan  * correctly detect the driver has been unregistered and reroute
    840   1.1  jonathan  * requests.
    841   1.1  jonathan  */
    842   1.1  jonathan int
    843   1.1  jonathan crypto_unregister_all(u_int32_t driverid)
    844   1.1  jonathan {
    845  1.62  knakahar 	int err, i;
    846   1.1  jonathan 
    847  1.57  knakahar 	mutex_enter(&crypto_drv_mtx);
    848  1.62  knakahar 	for (i = CRYPTO_ALGORITHM_MIN; i <= CRYPTO_ALGORITHM_MAX; i++) {
    849  1.62  knakahar 		err = crypto_unregister_locked(driverid, i, true);
    850  1.62  knakahar 		if (err)
    851  1.62  knakahar 			break;
    852  1.62  knakahar 	}
    853  1.62  knakahar 	mutex_exit(&crypto_drv_mtx);
    854   1.1  jonathan 
    855   1.1  jonathan 	return err;
    856   1.1  jonathan }
    857   1.1  jonathan 
    858   1.1  jonathan /*
    859   1.1  jonathan  * Clear blockage on a driver.  The what parameter indicates whether
    860   1.1  jonathan  * the driver is now ready for cryptop's and/or cryptokop's.
    861   1.1  jonathan  */
    862   1.1  jonathan int
    863   1.1  jonathan crypto_unblock(u_int32_t driverid, int what)
    864   1.1  jonathan {
    865   1.1  jonathan 	struct cryptocap *cap;
    866  1.55  knakahar 	int needwakeup = 0;
    867   1.1  jonathan 
    868  1.40  drochner 	mutex_spin_enter(&crypto_q_mtx);
    869   1.1  jonathan 	cap = crypto_checkdriver(driverid);
    870  1.55  knakahar 	if (cap == NULL) {
    871  1.40  drochner 		mutex_spin_exit(&crypto_q_mtx);
    872  1.55  knakahar 		return EINVAL;
    873  1.55  knakahar 	}
    874  1.55  knakahar 
    875  1.55  knakahar 	if (what & CRYPTO_SYMQ) {
    876  1.55  knakahar 		needwakeup |= cap->cc_qblocked;
    877  1.55  knakahar 		cap->cc_qblocked = 0;
    878  1.55  knakahar 	}
    879  1.55  knakahar 	if (what & CRYPTO_ASYMQ) {
    880  1.55  knakahar 		needwakeup |= cap->cc_kqblocked;
    881  1.55  knakahar 		cap->cc_kqblocked = 0;
    882  1.24       tls 	}
    883  1.56  knakahar 	mutex_spin_exit(&crypto_q_mtx);
    884  1.55  knakahar 	if (needwakeup)
    885  1.55  knakahar 		setsoftcrypto(softintr_cookie);
    886   1.1  jonathan 
    887  1.55  knakahar 	return 0;
    888   1.1  jonathan }
    889   1.1  jonathan 
    890   1.1  jonathan /*
    891   1.1  jonathan  * Dispatch a crypto request to a driver or queue
    892   1.1  jonathan  * it, to be processed by the kernel thread.
    893   1.1  jonathan  */
    894   1.1  jonathan int
    895   1.1  jonathan crypto_dispatch(struct cryptop *crp)
    896   1.1  jonathan {
    897  1.59  knakahar 	u_int32_t hid;
    898  1.23       tls 	int result;
    899  1.65  knakahar 	struct cryptocap *cap;
    900   1.1  jonathan 
    901  1.59  knakahar 	KASSERT(crp != NULL);
    902  1.59  knakahar 
    903  1.59  knakahar 	hid = CRYPTO_SESID2HID(crp->crp_sid);
    904  1.59  knakahar 
    905  1.64  knakahar 	DPRINTF("crp %p, alg %d\n", crp, crp->crp_desc->crd_alg);
    906   1.1  jonathan 
    907   1.1  jonathan 	cryptostats.cs_ops++;
    908   1.1  jonathan 
    909   1.1  jonathan #ifdef CRYPTO_TIMING
    910   1.1  jonathan 	if (crypto_timing)
    911   1.1  jonathan 		nanouptime(&crp->crp_tstamp);
    912   1.1  jonathan #endif
    913  1.58  knakahar 
    914  1.65  knakahar 	if ((crp->crp_flags & CRYPTO_F_BATCH) != 0) {
    915   1.1  jonathan 		int wasempty = TAILQ_EMPTY(&crp_q);
    916   1.1  jonathan 		/*
    917   1.1  jonathan 		 * Caller marked the request as ``ok to delay'';
    918   1.1  jonathan 		 * queue it for the swi thread.  This is desirable
    919   1.1  jonathan 		 * when the operation is low priority and/or suitable
    920   1.1  jonathan 		 * for batching.
    921   1.1  jonathan 		 */
    922  1.65  knakahar 		mutex_spin_enter(&crypto_q_mtx);
    923   1.1  jonathan 		TAILQ_INSERT_TAIL(&crp_q, crp, crp_next);
    924  1.56  knakahar 		mutex_spin_exit(&crypto_q_mtx);
    925  1.65  knakahar 		if (wasempty)
    926   1.1  jonathan 			setsoftcrypto(softintr_cookie);
    927  1.65  knakahar 
    928  1.65  knakahar 		return 0;
    929  1.65  knakahar 	}
    930  1.65  knakahar 
    931  1.65  knakahar 	mutex_spin_enter(&crypto_q_mtx);
    932  1.65  knakahar 
    933  1.66  knakahar 	cap = crypto_checkdriver(hid);
    934  1.66  knakahar 	/*
    935  1.66  knakahar 	 * TODO:
    936  1.66  knakahar 	 * If we can ensure the driver has been valid until the driver is
    937  1.66  knakahar 	 * done crypto_unregister(), this migrate operation is not required.
    938  1.66  knakahar 	 */
    939  1.66  knakahar 	if (cap == NULL) {
    940  1.66  knakahar 		/*
    941  1.66  knakahar 		 * The driver must be detached, so this request will migrate
    942  1.66  knakahar 		 * to other drivers in cryptointr() later.
    943  1.66  knakahar 		 */
    944  1.66  knakahar 		TAILQ_INSERT_TAIL(&crp_q, crp, crp_next);
    945  1.66  knakahar 		mutex_spin_exit(&crypto_q_mtx);
    946  1.66  knakahar 
    947  1.66  knakahar 		return 0;
    948  1.66  knakahar 	}
    949  1.66  knakahar 
    950  1.65  knakahar 	/*
    951  1.67  knakahar 	 * TODO:
    952  1.67  knakahar 	 * cap->cc_qblocked should be protected by a spin lock other than
    953  1.67  knakahar 	 * crypto_q_mtx.
    954  1.67  knakahar 	 */
    955  1.67  knakahar 	if (cap->cc_qblocked != 0) {
    956  1.67  knakahar 		/*
    957  1.67  knakahar 		 * The driver is blocked, just queue the op until
    958  1.67  knakahar 		 * it unblocks and the swi thread gets kicked.
    959  1.67  knakahar 		 */
    960  1.67  knakahar 		TAILQ_INSERT_TAIL(&crp_q, crp, crp_next);
    961  1.67  knakahar 		mutex_spin_exit(&crypto_q_mtx);
    962  1.67  knakahar 
    963  1.67  knakahar 		return 0;
    964  1.67  knakahar 	}
    965  1.67  knakahar 
    966  1.67  knakahar 	/*
    967  1.65  knakahar 	 * Caller marked the request to be processed
    968  1.65  knakahar 	 * immediately; dispatch it directly to the
    969  1.65  knakahar 	 * driver unless the driver is currently blocked.
    970  1.65  knakahar 	 */
    971  1.67  knakahar 	mutex_spin_exit(&crypto_q_mtx);
    972  1.67  knakahar 	result = crypto_invoke(crp, 0);
    973  1.67  knakahar 	if (result == ERESTART) {
    974  1.67  knakahar 		/*
    975  1.67  knakahar 		 * The driver ran out of resources, mark the
    976  1.67  knakahar 		 * driver ``blocked'' for cryptop's and put
    977  1.67  knakahar 		 * the op on the queue.
    978  1.67  knakahar 		 */
    979  1.67  knakahar 		mutex_spin_enter(&crypto_q_mtx);
    980  1.67  knakahar 		crypto_drivers[hid].cc_qblocked = 1;
    981  1.67  knakahar 		TAILQ_INSERT_HEAD(&crp_q, crp, crp_next);
    982  1.67  knakahar 		cryptostats.cs_blocks++;
    983  1.65  knakahar 		mutex_spin_exit(&crypto_q_mtx);
    984  1.65  knakahar 
    985  1.65  knakahar 		/*
    986  1.67  knakahar 		 * The crp is enqueued to crp_q, that is,
    987  1.67  knakahar 		 * no error occurs. So, this function should
    988  1.67  knakahar 		 * not return error.
    989  1.65  knakahar 		 */
    990   1.1  jonathan 		result = 0;
    991   1.1  jonathan 	}
    992   1.1  jonathan 
    993   1.1  jonathan 	return result;
    994   1.1  jonathan }
    995   1.1  jonathan 
    996   1.1  jonathan /*
    997   1.1  jonathan  * Add an asymetric crypto request to a queue,
    998   1.1  jonathan  * to be processed by the kernel thread.
    999   1.1  jonathan  */
   1000   1.1  jonathan int
   1001   1.1  jonathan crypto_kdispatch(struct cryptkop *krp)
   1002   1.1  jonathan {
   1003   1.1  jonathan 	struct cryptocap *cap;
   1004  1.23       tls 	int result;
   1005   1.1  jonathan 
   1006  1.59  knakahar 	KASSERT(krp != NULL);
   1007  1.59  knakahar 
   1008  1.40  drochner 	mutex_spin_enter(&crypto_q_mtx);
   1009   1.1  jonathan 	cryptostats.cs_kops++;
   1010   1.1  jonathan 
   1011   1.1  jonathan 	cap = crypto_checkdriver(krp->krp_hid);
   1012  1.68  knakahar 	/*
   1013  1.68  knakahar 	 * TODO:
   1014  1.68  knakahar 	 * If we can ensure the driver has been valid until the driver is
   1015  1.68  knakahar 	 * done crypto_unregister(), this migrate operation is not required.
   1016  1.68  knakahar 	 */
   1017  1.68  knakahar 	if (cap == NULL) {
   1018  1.68  knakahar 		TAILQ_INSERT_TAIL(&crp_kq, krp, krp_next);
   1019  1.40  drochner 		mutex_spin_exit(&crypto_q_mtx);
   1020  1.58  knakahar 
   1021  1.68  knakahar 		return 0;
   1022  1.68  knakahar 	}
   1023  1.68  knakahar 
   1024  1.68  knakahar 	if (cap->cc_kqblocked != 0) {
   1025   1.1  jonathan 		/*
   1026   1.1  jonathan 		 * The driver is blocked, just queue the op until
   1027   1.1  jonathan 		 * it unblocks and the swi thread gets kicked.
   1028   1.1  jonathan 		 */
   1029   1.1  jonathan 		TAILQ_INSERT_TAIL(&crp_kq, krp, krp_next);
   1030  1.68  knakahar 		mutex_spin_exit(&crypto_q_mtx);
   1031  1.68  knakahar 
   1032  1.68  knakahar 		return 0;
   1033  1.68  knakahar 	}
   1034  1.68  knakahar 
   1035  1.68  knakahar 	mutex_spin_exit(&crypto_q_mtx);
   1036  1.68  knakahar 	result = crypto_kinvoke(krp, 0);
   1037  1.68  knakahar 	if (result == ERESTART) {
   1038  1.68  knakahar 		/*
   1039  1.68  knakahar 		 * The driver ran out of resources, mark the
   1040  1.68  knakahar 		 * driver ``blocked'' for cryptop's and put
   1041  1.68  knakahar 		 * the op on the queue.
   1042  1.68  knakahar 		 */
   1043  1.68  knakahar 		mutex_spin_enter(&crypto_q_mtx);
   1044  1.68  knakahar 		crypto_drivers[krp->krp_hid].cc_kqblocked = 1;
   1045  1.68  knakahar 		TAILQ_INSERT_HEAD(&crp_kq, krp, krp_next);
   1046  1.68  knakahar 		cryptostats.cs_kblocks++;
   1047  1.68  knakahar 		mutex_spin_exit(&crypto_q_mtx);
   1048  1.68  knakahar 
   1049  1.68  knakahar 		/*
   1050  1.68  knakahar 		 * The krp is enqueued to crp_kq, that is,
   1051  1.68  knakahar 		 * no error occurs. So, this function should
   1052  1.68  knakahar 		 * not return error.
   1053  1.68  knakahar 		 */
   1054   1.1  jonathan 		result = 0;
   1055   1.1  jonathan 	}
   1056   1.1  jonathan 
   1057   1.1  jonathan 	return result;
   1058   1.1  jonathan }
   1059   1.1  jonathan 
   1060   1.1  jonathan /*
   1061   1.1  jonathan  * Dispatch an assymetric crypto request to the appropriate crypto devices.
   1062   1.1  jonathan  */
   1063   1.1  jonathan static int
   1064   1.1  jonathan crypto_kinvoke(struct cryptkop *krp, int hint)
   1065   1.1  jonathan {
   1066   1.1  jonathan 	u_int32_t hid;
   1067   1.1  jonathan 	int error;
   1068   1.1  jonathan 
   1069  1.59  knakahar 	KASSERT(krp != NULL);
   1070  1.59  knakahar 
   1071   1.1  jonathan 	/* Sanity checks. */
   1072   1.1  jonathan 	if (krp->krp_callback == NULL) {
   1073  1.30    darran 		cv_destroy(&krp->krp_cv);
   1074  1.23       tls 		pool_put(&cryptkop_pool, krp);
   1075   1.1  jonathan 		return EINVAL;
   1076   1.1  jonathan 	}
   1077   1.1  jonathan 
   1078  1.57  knakahar 	mutex_enter(&crypto_drv_mtx);
   1079   1.1  jonathan 	for (hid = 0; hid < crypto_drivers_num; hid++) {
   1080   1.1  jonathan 		if ((crypto_drivers[hid].cc_flags & CRYPTOCAP_F_SOFTWARE) &&
   1081   1.1  jonathan 		    crypto_devallowsoft == 0)
   1082   1.1  jonathan 			continue;
   1083   1.1  jonathan 		if (crypto_drivers[hid].cc_kprocess == NULL)
   1084   1.1  jonathan 			continue;
   1085   1.1  jonathan 		if ((crypto_drivers[hid].cc_kalg[krp->krp_op] &
   1086   1.1  jonathan 		    CRYPTO_ALG_FLAG_SUPPORTED) == 0)
   1087   1.1  jonathan 			continue;
   1088   1.1  jonathan 		break;
   1089   1.1  jonathan 	}
   1090   1.1  jonathan 	if (hid < crypto_drivers_num) {
   1091  1.37  christos 		int (*process)(void *, struct cryptkop *, int);
   1092  1.37  christos 		void *arg;
   1093  1.37  christos 
   1094  1.37  christos 		process = crypto_drivers[hid].cc_kprocess;
   1095  1.37  christos 		arg = crypto_drivers[hid].cc_karg;
   1096  1.57  knakahar 		mutex_exit(&crypto_drv_mtx);
   1097   1.1  jonathan 		krp->krp_hid = hid;
   1098  1.37  christos 		error = (*process)(arg, krp, hint);
   1099   1.1  jonathan 	} else {
   1100  1.57  knakahar 		mutex_exit(&crypto_drv_mtx);
   1101   1.1  jonathan 		error = ENODEV;
   1102   1.1  jonathan 	}
   1103   1.1  jonathan 
   1104   1.1  jonathan 	if (error) {
   1105   1.1  jonathan 		krp->krp_status = error;
   1106   1.1  jonathan 		crypto_kdone(krp);
   1107   1.1  jonathan 	}
   1108   1.1  jonathan 	return 0;
   1109   1.1  jonathan }
   1110   1.1  jonathan 
   1111   1.1  jonathan #ifdef CRYPTO_TIMING
   1112   1.1  jonathan static void
   1113   1.1  jonathan crypto_tstat(struct cryptotstat *ts, struct timespec *tv)
   1114   1.1  jonathan {
   1115   1.1  jonathan 	struct timespec now, t;
   1116   1.1  jonathan 
   1117   1.1  jonathan 	nanouptime(&now);
   1118   1.1  jonathan 	t.tv_sec = now.tv_sec - tv->tv_sec;
   1119   1.1  jonathan 	t.tv_nsec = now.tv_nsec - tv->tv_nsec;
   1120   1.1  jonathan 	if (t.tv_nsec < 0) {
   1121   1.1  jonathan 		t.tv_sec--;
   1122   1.1  jonathan 		t.tv_nsec += 1000000000;
   1123   1.1  jonathan 	}
   1124   1.1  jonathan 	timespecadd(&ts->acc, &t, &t);
   1125   1.1  jonathan 	if (timespeccmp(&t, &ts->min, <))
   1126   1.1  jonathan 		ts->min = t;
   1127   1.1  jonathan 	if (timespeccmp(&t, &ts->max, >))
   1128   1.1  jonathan 		ts->max = t;
   1129   1.1  jonathan 	ts->count++;
   1130   1.1  jonathan 
   1131   1.1  jonathan 	*tv = now;
   1132   1.1  jonathan }
   1133   1.1  jonathan #endif
   1134   1.1  jonathan 
   1135   1.1  jonathan /*
   1136   1.1  jonathan  * Dispatch a crypto request to the appropriate crypto devices.
   1137   1.1  jonathan  */
   1138   1.1  jonathan static int
   1139   1.1  jonathan crypto_invoke(struct cryptop *crp, int hint)
   1140   1.1  jonathan {
   1141   1.1  jonathan 	u_int32_t hid;
   1142   1.1  jonathan 
   1143  1.59  knakahar 	KASSERT(crp != NULL);
   1144  1.59  knakahar 
   1145   1.1  jonathan #ifdef CRYPTO_TIMING
   1146   1.1  jonathan 	if (crypto_timing)
   1147   1.1  jonathan 		crypto_tstat(&cryptostats.cs_invoke, &crp->crp_tstamp);
   1148   1.1  jonathan #endif
   1149   1.1  jonathan 	/* Sanity checks. */
   1150   1.1  jonathan 	if (crp->crp_callback == NULL) {
   1151   1.1  jonathan 		return EINVAL;
   1152   1.1  jonathan 	}
   1153   1.1  jonathan 	if (crp->crp_desc == NULL) {
   1154   1.1  jonathan 		crp->crp_etype = EINVAL;
   1155   1.1  jonathan 		crypto_done(crp);
   1156   1.1  jonathan 		return 0;
   1157   1.1  jonathan 	}
   1158   1.1  jonathan 
   1159  1.35  jakllsch 	hid = CRYPTO_SESID2HID(crp->crp_sid);
   1160  1.37  christos 
   1161  1.63  knakahar 	if ((crypto_drivers[hid].cc_flags & CRYPTOCAP_F_CLEANUP) == 0) {
   1162  1.37  christos 		int (*process)(void *, struct cryptop *, int);
   1163  1.37  christos 		void *arg;
   1164  1.37  christos 
   1165   1.1  jonathan 		process = crypto_drivers[hid].cc_process;
   1166  1.37  christos 		arg = crypto_drivers[hid].cc_arg;
   1167  1.37  christos 
   1168  1.37  christos 		/*
   1169  1.37  christos 		 * Invoke the driver to process the request.
   1170  1.37  christos 		 */
   1171  1.64  knakahar 		DPRINTF("calling process for %p\n", crp);
   1172  1.37  christos 		return (*process)(arg, crp, hint);
   1173   1.1  jonathan 	} else {
   1174   1.1  jonathan 		struct cryptodesc *crd;
   1175  1.16       mrg 		u_int64_t nid = 0;
   1176   1.1  jonathan 
   1177   1.1  jonathan 		/*
   1178   1.1  jonathan 		 * Driver has unregistered; migrate the session and return
   1179   1.1  jonathan 		 * an error to the caller so they'll resubmit the op.
   1180   1.1  jonathan 		 */
   1181  1.63  knakahar 		crypto_freesession(crp->crp_sid);
   1182  1.63  knakahar 
   1183   1.1  jonathan 		for (crd = crp->crp_desc; crd->crd_next; crd = crd->crd_next)
   1184   1.1  jonathan 			crd->CRD_INI.cri_next = &(crd->crd_next->CRD_INI);
   1185   1.1  jonathan 
   1186   1.1  jonathan 		if (crypto_newsession(&nid, &(crp->crp_desc->CRD_INI), 0) == 0)
   1187   1.1  jonathan 			crp->crp_sid = nid;
   1188   1.1  jonathan 
   1189   1.1  jonathan 		crp->crp_etype = EAGAIN;
   1190  1.23       tls 
   1191   1.1  jonathan 		crypto_done(crp);
   1192   1.1  jonathan 		return 0;
   1193   1.1  jonathan 	}
   1194   1.1  jonathan }
   1195   1.1  jonathan 
   1196   1.1  jonathan /*
   1197   1.1  jonathan  * Release a set of crypto descriptors.
   1198   1.1  jonathan  */
   1199   1.1  jonathan void
   1200   1.1  jonathan crypto_freereq(struct cryptop *crp)
   1201   1.1  jonathan {
   1202   1.1  jonathan 	struct cryptodesc *crd;
   1203   1.1  jonathan 
   1204   1.1  jonathan 	if (crp == NULL)
   1205   1.1  jonathan 		return;
   1206  1.64  knakahar 	DPRINTF("lid[%u]: crp %p\n", CRYPTO_SESID2LID(crp->crp_sid), crp);
   1207   1.1  jonathan 
   1208  1.30    darran 	/* sanity check */
   1209  1.30    darran 	if (crp->crp_flags & CRYPTO_F_ONRETQ) {
   1210  1.30    darran 		panic("crypto_freereq() freeing crp on RETQ\n");
   1211  1.30    darran 	}
   1212  1.30    darran 
   1213   1.1  jonathan 	while ((crd = crp->crp_desc) != NULL) {
   1214   1.1  jonathan 		crp->crp_desc = crd->crd_next;
   1215   1.1  jonathan 		pool_put(&cryptodesc_pool, crd);
   1216   1.1  jonathan 	}
   1217   1.1  jonathan 	pool_put(&cryptop_pool, crp);
   1218   1.1  jonathan }
   1219   1.1  jonathan 
   1220   1.1  jonathan /*
   1221   1.1  jonathan  * Acquire a set of crypto descriptors.
   1222   1.1  jonathan  */
   1223   1.1  jonathan struct cryptop *
   1224   1.1  jonathan crypto_getreq(int num)
   1225   1.1  jonathan {
   1226   1.1  jonathan 	struct cryptodesc *crd;
   1227   1.1  jonathan 	struct cryptop *crp;
   1228   1.1  jonathan 
   1229  1.74  knakahar 	/*
   1230  1.74  knakahar 	 * When crp_ret_q is full, we restrict here to avoid crp_ret_q overflow
   1231  1.74  knakahar 	 * by error callback.
   1232  1.74  knakahar 	 */
   1233  1.74  knakahar 	if (CRYPTO_Q_IS_FULL(crp_ret_q)) {
   1234  1.74  knakahar 		CRYPTO_Q_INC_DROPS(crp_ret_q);
   1235  1.74  knakahar 		return NULL;
   1236  1.74  knakahar 	}
   1237  1.74  knakahar 
   1238   1.1  jonathan 	crp = pool_get(&cryptop_pool, 0);
   1239   1.1  jonathan 	if (crp == NULL) {
   1240   1.1  jonathan 		return NULL;
   1241   1.1  jonathan 	}
   1242  1.31    cegger 	memset(crp, 0, sizeof(struct cryptop));
   1243   1.1  jonathan 
   1244   1.1  jonathan 	while (num--) {
   1245   1.1  jonathan 		crd = pool_get(&cryptodesc_pool, 0);
   1246   1.1  jonathan 		if (crd == NULL) {
   1247   1.1  jonathan 			crypto_freereq(crp);
   1248   1.1  jonathan 			return NULL;
   1249   1.1  jonathan 		}
   1250   1.1  jonathan 
   1251  1.31    cegger 		memset(crd, 0, sizeof(struct cryptodesc));
   1252   1.1  jonathan 		crd->crd_next = crp->crp_desc;
   1253   1.1  jonathan 		crp->crp_desc = crd;
   1254   1.1  jonathan 	}
   1255   1.1  jonathan 
   1256   1.1  jonathan 	return crp;
   1257   1.1  jonathan }
   1258   1.1  jonathan 
   1259   1.1  jonathan /*
   1260   1.1  jonathan  * Invoke the callback on behalf of the driver.
   1261   1.1  jonathan  */
   1262   1.1  jonathan void
   1263   1.1  jonathan crypto_done(struct cryptop *crp)
   1264   1.1  jonathan {
   1265  1.23       tls 	int wasempty;
   1266  1.23       tls 
   1267  1.59  knakahar 	KASSERT(crp != NULL);
   1268  1.59  knakahar 
   1269   1.1  jonathan 	if (crp->crp_etype != 0)
   1270   1.1  jonathan 		cryptostats.cs_errs++;
   1271   1.1  jonathan #ifdef CRYPTO_TIMING
   1272   1.1  jonathan 	if (crypto_timing)
   1273   1.1  jonathan 		crypto_tstat(&cryptostats.cs_done, &crp->crp_tstamp);
   1274   1.1  jonathan #endif
   1275  1.64  knakahar 	DPRINTF("lid[%u]: crp %p\n", CRYPTO_SESID2LID(crp->crp_sid), crp);
   1276  1.27       tls 
   1277   1.1  jonathan 	/*
   1278  1.23       tls 	 * Normal case; queue the callback for the thread.
   1279  1.23       tls 	 *
   1280  1.23       tls 	 * The return queue is manipulated by the swi thread
   1281  1.23       tls 	 * and, potentially, by crypto device drivers calling
   1282  1.23       tls 	 * back to mark operations completed.  Thus we need
   1283  1.23       tls 	 * to mask both while manipulating the return queue.
   1284   1.1  jonathan 	 */
   1285  1.27       tls   	if (crp->crp_flags & CRYPTO_F_CBIMM) {
   1286  1.27       tls 		/*
   1287  1.27       tls 	 	* Do the callback directly.  This is ok when the
   1288  1.27       tls   	 	* callback routine does very little (e.g. the
   1289  1.27       tls 	 	* /dev/crypto callback method just does a wakeup).
   1290  1.27       tls 	 	*/
   1291  1.40  drochner 		mutex_spin_enter(&crypto_ret_q_mtx);
   1292  1.30    darran 		crp->crp_flags |= CRYPTO_F_DONE;
   1293  1.40  drochner 		mutex_spin_exit(&crypto_ret_q_mtx);
   1294  1.30    darran 
   1295  1.27       tls #ifdef CRYPTO_TIMING
   1296  1.27       tls 		if (crypto_timing) {
   1297  1.27       tls 			/*
   1298  1.27       tls 		 	* NB: We must copy the timestamp before
   1299  1.27       tls 		 	* doing the callback as the cryptop is
   1300  1.27       tls 		 	* likely to be reclaimed.
   1301  1.27       tls 		 	*/
   1302  1.27       tls 			struct timespec t = crp->crp_tstamp;
   1303  1.27       tls 			crypto_tstat(&cryptostats.cs_cb, &t);
   1304  1.27       tls 			crp->crp_callback(crp);
   1305  1.27       tls 			crypto_tstat(&cryptostats.cs_finis, &t);
   1306  1.27       tls 		} else
   1307  1.27       tls #endif
   1308  1.27       tls 		crp->crp_callback(crp);
   1309  1.27       tls 	} else {
   1310  1.40  drochner 		mutex_spin_enter(&crypto_ret_q_mtx);
   1311  1.30    darran 		crp->crp_flags |= CRYPTO_F_DONE;
   1312  1.52  knakahar #if 0
   1313  1.30    darran 		if (crp->crp_flags & CRYPTO_F_USER) {
   1314  1.52  knakahar 			/*
   1315  1.52  knakahar 			 * TODO:
   1316  1.52  knakahar 			 * If crp->crp_flags & CRYPTO_F_USER and the used
   1317  1.52  knakahar 			 * encryption driver does all the processing in
   1318  1.52  knakahar 			 * the same context, we can skip enqueueing crp_ret_q
   1319  1.52  knakahar 			 * and cv_signal(&cryptoret_cv).
   1320  1.30    darran 			 */
   1321  1.64  knakahar 			DPRINTF("lid[%u]: crp %p CRYPTO_F_USER\n",
   1322  1.64  knakahar 				CRYPTO_SESID2LID(crp->crp_sid), crp);
   1323  1.52  knakahar 		} else
   1324  1.52  knakahar #endif
   1325  1.52  knakahar 		{
   1326  1.30    darran 			wasempty = TAILQ_EMPTY(&crp_ret_q);
   1327  1.64  knakahar 			DPRINTF("lid[%u]: queueing %p\n",
   1328  1.64  knakahar 				CRYPTO_SESID2LID(crp->crp_sid), crp);
   1329  1.30    darran 			crp->crp_flags |= CRYPTO_F_ONRETQ;
   1330  1.30    darran 			TAILQ_INSERT_TAIL(&crp_ret_q, crp, crp_next);
   1331  1.73  knakahar 			CRYPTO_Q_INC(crp_ret_q);
   1332  1.30    darran 			if (wasempty) {
   1333  1.64  knakahar 				DPRINTF("lid[%u]: waking cryptoret, "
   1334  1.35  jakllsch 					"crp %p hit empty queue\n.",
   1335  1.64  knakahar 					CRYPTO_SESID2LID(crp->crp_sid), crp);
   1336  1.30    darran 				cv_signal(&cryptoret_cv);
   1337  1.30    darran 			}
   1338  1.27       tls 		}
   1339  1.40  drochner 		mutex_spin_exit(&crypto_ret_q_mtx);
   1340   1.1  jonathan 	}
   1341   1.1  jonathan }
   1342   1.1  jonathan 
   1343   1.1  jonathan /*
   1344   1.1  jonathan  * Invoke the callback on behalf of the driver.
   1345   1.1  jonathan  */
   1346   1.1  jonathan void
   1347   1.1  jonathan crypto_kdone(struct cryptkop *krp)
   1348   1.1  jonathan {
   1349  1.23       tls 	int wasempty;
   1350   1.1  jonathan 
   1351  1.59  knakahar 	KASSERT(krp != NULL);
   1352  1.59  knakahar 
   1353   1.1  jonathan 	if (krp->krp_status != 0)
   1354   1.1  jonathan 		cryptostats.cs_kerrs++;
   1355  1.27       tls 
   1356  1.27       tls 	krp->krp_flags |= CRYPTO_F_DONE;
   1357  1.27       tls 
   1358   1.1  jonathan 	/*
   1359   1.1  jonathan 	 * The return queue is manipulated by the swi thread
   1360   1.1  jonathan 	 * and, potentially, by crypto device drivers calling
   1361   1.1  jonathan 	 * back to mark operations completed.  Thus we need
   1362   1.1  jonathan 	 * to mask both while manipulating the return queue.
   1363   1.1  jonathan 	 */
   1364  1.27       tls 	if (krp->krp_flags & CRYPTO_F_CBIMM) {
   1365  1.27       tls 		krp->krp_callback(krp);
   1366  1.27       tls 	} else {
   1367  1.40  drochner 		mutex_spin_enter(&crypto_ret_q_mtx);
   1368  1.27       tls 		wasempty = TAILQ_EMPTY(&crp_ret_kq);
   1369  1.27       tls 		krp->krp_flags |= CRYPTO_F_ONRETQ;
   1370  1.27       tls 		TAILQ_INSERT_TAIL(&crp_ret_kq, krp, krp_next);
   1371  1.73  knakahar 		CRYPTO_Q_INC(crp_ret_kq);
   1372  1.27       tls 		if (wasempty)
   1373  1.27       tls 			cv_signal(&cryptoret_cv);
   1374  1.40  drochner 		mutex_spin_exit(&crypto_ret_q_mtx);
   1375  1.27       tls 	}
   1376   1.1  jonathan }
   1377   1.1  jonathan 
   1378   1.1  jonathan int
   1379   1.1  jonathan crypto_getfeat(int *featp)
   1380   1.1  jonathan {
   1381   1.1  jonathan 	int hid, kalg, feat = 0;
   1382   1.1  jonathan 
   1383  1.57  knakahar 	if (crypto_userasymcrypto == 0)
   1384  1.57  knakahar 		return 0;
   1385   1.1  jonathan 
   1386  1.57  knakahar 	mutex_enter(&crypto_drv_mtx);
   1387   1.1  jonathan 
   1388   1.1  jonathan 	for (hid = 0; hid < crypto_drivers_num; hid++) {
   1389   1.1  jonathan 		if ((crypto_drivers[hid].cc_flags & CRYPTOCAP_F_SOFTWARE) &&
   1390   1.7  jonathan 		    crypto_devallowsoft == 0) {
   1391   1.1  jonathan 			continue;
   1392   1.1  jonathan 		}
   1393   1.1  jonathan 		if (crypto_drivers[hid].cc_kprocess == NULL)
   1394   1.1  jonathan 			continue;
   1395   1.1  jonathan 		for (kalg = 0; kalg < CRK_ALGORITHM_MAX; kalg++)
   1396   1.1  jonathan 			if ((crypto_drivers[hid].cc_kalg[kalg] &
   1397   1.1  jonathan 			    CRYPTO_ALG_FLAG_SUPPORTED) != 0)
   1398   1.1  jonathan 				feat |=  1 << kalg;
   1399   1.1  jonathan 	}
   1400  1.57  knakahar 
   1401  1.57  knakahar 	mutex_exit(&crypto_drv_mtx);
   1402   1.1  jonathan 	*featp = feat;
   1403   1.1  jonathan 	return (0);
   1404   1.1  jonathan }
   1405   1.1  jonathan 
   1406   1.1  jonathan /*
   1407   1.1  jonathan  * Software interrupt thread to dispatch crypto requests.
   1408   1.1  jonathan  */
   1409   1.1  jonathan static void
   1410   1.1  jonathan cryptointr(void)
   1411   1.1  jonathan {
   1412  1.30    darran 	struct cryptop *crp, *submit, *cnext;
   1413  1.30    darran 	struct cryptkop *krp, *knext;
   1414   1.1  jonathan 	struct cryptocap *cap;
   1415  1.23       tls 	int result, hint;
   1416   1.1  jonathan 
   1417   1.1  jonathan 	cryptostats.cs_intrs++;
   1418  1.40  drochner 	mutex_spin_enter(&crypto_q_mtx);
   1419   1.1  jonathan 	do {
   1420   1.1  jonathan 		/*
   1421   1.1  jonathan 		 * Find the first element in the queue that can be
   1422   1.1  jonathan 		 * processed and look-ahead to see if multiple ops
   1423   1.1  jonathan 		 * are ready for the same driver.
   1424   1.1  jonathan 		 */
   1425   1.1  jonathan 		submit = NULL;
   1426   1.1  jonathan 		hint = 0;
   1427  1.30    darran 		TAILQ_FOREACH_SAFE(crp, &crp_q, crp_next, cnext) {
   1428  1.35  jakllsch 			u_int32_t hid = CRYPTO_SESID2HID(crp->crp_sid);
   1429   1.1  jonathan 			cap = crypto_checkdriver(hid);
   1430   1.1  jonathan 			if (cap == NULL || cap->cc_process == NULL) {
   1431   1.1  jonathan 				/* Op needs to be migrated, process it. */
   1432  1.69  knakahar 				submit = crp;
   1433   1.1  jonathan 				break;
   1434   1.1  jonathan 			}
   1435  1.70  knakahar 
   1436  1.70  knakahar 			/*
   1437  1.70  knakahar 			 * skip blocked crp regardless of CRYPTO_F_BATCH
   1438  1.70  knakahar 			 */
   1439  1.70  knakahar 			if (cap->cc_qblocked != 0)
   1440  1.70  knakahar 				continue;
   1441  1.70  knakahar 
   1442  1.71  knakahar 			/*
   1443  1.71  knakahar 			 * skip batch crp until the end of crp_q
   1444  1.71  knakahar 			 */
   1445  1.71  knakahar 			if ((crp->crp_flags & CRYPTO_F_BATCH) != 0) {
   1446  1.71  knakahar 				if (submit == NULL) {
   1447  1.71  knakahar 					submit = crp;
   1448  1.71  knakahar 				} else {
   1449  1.71  knakahar 					if (CRYPTO_SESID2HID(submit->crp_sid)
   1450  1.71  knakahar 					    == hid)
   1451  1.71  knakahar 						hint = CRYPTO_HINT_MORE;
   1452  1.71  knakahar 				}
   1453  1.71  knakahar 
   1454  1.71  knakahar 				continue;
   1455   1.1  jonathan 			}
   1456  1.71  knakahar 
   1457  1.71  knakahar 			/*
   1458  1.71  knakahar 			 * found first crp which is neither blocked nor batch.
   1459  1.71  knakahar 			 */
   1460  1.71  knakahar 			submit = crp;
   1461  1.71  knakahar 			/*
   1462  1.71  knakahar 			 * batch crp can be processed much later, so clear hint.
   1463  1.71  knakahar 			 */
   1464  1.71  knakahar 			hint = 0;
   1465  1.71  knakahar 			break;
   1466   1.1  jonathan 		}
   1467   1.1  jonathan 		if (submit != NULL) {
   1468   1.1  jonathan 			TAILQ_REMOVE(&crp_q, submit, crp_next);
   1469  1.40  drochner 			mutex_spin_exit(&crypto_q_mtx);
   1470   1.1  jonathan 			result = crypto_invoke(submit, hint);
   1471  1.23       tls 			/* we must take here as the TAILQ op or kinvoke
   1472  1.23       tls 			   may need this mutex below.  sigh. */
   1473  1.48   msaitoh 			mutex_spin_enter(&crypto_q_mtx);
   1474   1.1  jonathan 			if (result == ERESTART) {
   1475   1.1  jonathan 				/*
   1476   1.1  jonathan 				 * The driver ran out of resources, mark the
   1477   1.1  jonathan 				 * driver ``blocked'' for cryptop's and put
   1478   1.1  jonathan 				 * the request back in the queue.  It would
   1479   1.1  jonathan 				 * best to put the request back where we got
   1480   1.1  jonathan 				 * it but that's hard so for now we put it
   1481   1.1  jonathan 				 * at the front.  This should be ok; putting
   1482   1.1  jonathan 				 * it at the end does not work.
   1483   1.1  jonathan 				 */
   1484   1.1  jonathan 				/* XXX validate sid again? */
   1485  1.35  jakllsch 				crypto_drivers[CRYPTO_SESID2HID(submit->crp_sid)].cc_qblocked = 1;
   1486   1.1  jonathan 				TAILQ_INSERT_HEAD(&crp_q, submit, crp_next);
   1487   1.1  jonathan 				cryptostats.cs_blocks++;
   1488   1.1  jonathan 			}
   1489   1.1  jonathan 		}
   1490   1.1  jonathan 
   1491   1.1  jonathan 		/* As above, but for key ops */
   1492  1.30    darran 		TAILQ_FOREACH_SAFE(krp, &crp_kq, krp_next, knext) {
   1493   1.1  jonathan 			cap = crypto_checkdriver(krp->krp_hid);
   1494   1.1  jonathan 			if (cap == NULL || cap->cc_kprocess == NULL) {
   1495   1.1  jonathan 				/* Op needs to be migrated, process it. */
   1496   1.1  jonathan 				break;
   1497   1.1  jonathan 			}
   1498   1.1  jonathan 			if (!cap->cc_kqblocked)
   1499   1.1  jonathan 				break;
   1500   1.1  jonathan 		}
   1501   1.1  jonathan 		if (krp != NULL) {
   1502   1.1  jonathan 			TAILQ_REMOVE(&crp_kq, krp, krp_next);
   1503  1.40  drochner 			mutex_spin_exit(&crypto_q_mtx);
   1504   1.1  jonathan 			result = crypto_kinvoke(krp, 0);
   1505  1.23       tls 			/* the next iteration will want the mutex. :-/ */
   1506  1.40  drochner 			mutex_spin_enter(&crypto_q_mtx);
   1507   1.1  jonathan 			if (result == ERESTART) {
   1508   1.1  jonathan 				/*
   1509   1.1  jonathan 				 * The driver ran out of resources, mark the
   1510   1.1  jonathan 				 * driver ``blocked'' for cryptkop's and put
   1511   1.1  jonathan 				 * the request back in the queue.  It would
   1512   1.1  jonathan 				 * best to put the request back where we got
   1513   1.1  jonathan 				 * it but that's hard so for now we put it
   1514   1.1  jonathan 				 * at the front.  This should be ok; putting
   1515   1.1  jonathan 				 * it at the end does not work.
   1516   1.1  jonathan 				 */
   1517   1.1  jonathan 				/* XXX validate sid again? */
   1518   1.1  jonathan 				crypto_drivers[krp->krp_hid].cc_kqblocked = 1;
   1519   1.1  jonathan 				TAILQ_INSERT_HEAD(&crp_kq, krp, krp_next);
   1520   1.1  jonathan 				cryptostats.cs_kblocks++;
   1521   1.1  jonathan 			}
   1522   1.1  jonathan 		}
   1523   1.1  jonathan 	} while (submit != NULL || krp != NULL);
   1524  1.40  drochner 	mutex_spin_exit(&crypto_q_mtx);
   1525   1.1  jonathan }
   1526   1.1  jonathan 
   1527   1.1  jonathan /*
   1528   1.1  jonathan  * Kernel thread to do callbacks.
   1529   1.1  jonathan  */
   1530   1.1  jonathan static void
   1531   1.1  jonathan cryptoret(void)
   1532   1.1  jonathan {
   1533   1.1  jonathan 	struct cryptop *crp;
   1534   1.1  jonathan 	struct cryptkop *krp;
   1535   1.1  jonathan 
   1536  1.40  drochner 	mutex_spin_enter(&crypto_ret_q_mtx);
   1537   1.1  jonathan 	for (;;) {
   1538   1.1  jonathan 		crp = TAILQ_FIRST(&crp_ret_q);
   1539  1.23       tls 		if (crp != NULL) {
   1540   1.1  jonathan 			TAILQ_REMOVE(&crp_ret_q, crp, crp_next);
   1541  1.73  knakahar 			CRYPTO_Q_DEC(crp_ret_q);
   1542  1.23       tls 			crp->crp_flags &= ~CRYPTO_F_ONRETQ;
   1543  1.23       tls 		}
   1544   1.1  jonathan 		krp = TAILQ_FIRST(&crp_ret_kq);
   1545  1.23       tls 		if (krp != NULL) {
   1546   1.1  jonathan 			TAILQ_REMOVE(&crp_ret_kq, krp, krp_next);
   1547  1.73  knakahar 			CRYPTO_Q_DEC(crp_ret_kq);
   1548  1.23       tls 			krp->krp_flags &= ~CRYPTO_F_ONRETQ;
   1549  1.23       tls 		}
   1550   1.1  jonathan 
   1551  1.23       tls 		/* drop before calling any callbacks. */
   1552  1.26        ad 		if (crp == NULL && krp == NULL) {
   1553  1.46  pgoyette 
   1554  1.46  pgoyette                         /* Check for the exit condition. */
   1555  1.46  pgoyette 			if (crypto_exit_flag != 0) {
   1556  1.46  pgoyette 
   1557  1.46  pgoyette         			/* Time to die. */
   1558  1.46  pgoyette 				crypto_exit_flag = 0;
   1559  1.46  pgoyette         			cv_broadcast(&cryptoret_cv);
   1560  1.46  pgoyette 				mutex_spin_exit(&crypto_ret_q_mtx);
   1561  1.46  pgoyette         			kthread_exit(0);
   1562  1.46  pgoyette 			}
   1563  1.46  pgoyette 
   1564  1.26        ad 			cryptostats.cs_rets++;
   1565  1.40  drochner 			cv_wait(&cryptoret_cv, &crypto_ret_q_mtx);
   1566  1.26        ad 			continue;
   1567  1.26        ad 		}
   1568  1.26        ad 
   1569  1.40  drochner 		mutex_spin_exit(&crypto_ret_q_mtx);
   1570  1.26        ad 
   1571  1.26        ad 		if (crp != NULL) {
   1572   1.1  jonathan #ifdef CRYPTO_TIMING
   1573  1.26        ad 			if (crypto_timing) {
   1574  1.26        ad 				/*
   1575  1.26        ad 				 * NB: We must copy the timestamp before
   1576  1.26        ad 				 * doing the callback as the cryptop is
   1577  1.26        ad 				 * likely to be reclaimed.
   1578  1.26        ad 				 */
   1579  1.26        ad 				struct timespec t = crp->crp_tstamp;
   1580  1.26        ad 				crypto_tstat(&cryptostats.cs_cb, &t);
   1581  1.26        ad 				crp->crp_callback(crp);
   1582  1.26        ad 				crypto_tstat(&cryptostats.cs_finis, &t);
   1583  1.26        ad 			} else
   1584   1.1  jonathan #endif
   1585  1.26        ad 			{
   1586  1.26        ad 				crp->crp_callback(crp);
   1587   1.1  jonathan 			}
   1588   1.1  jonathan 		}
   1589  1.26        ad 		if (krp != NULL)
   1590  1.26        ad 			krp->krp_callback(krp);
   1591  1.26        ad 
   1592  1.40  drochner 		mutex_spin_enter(&crypto_ret_q_mtx);
   1593   1.1  jonathan 	}
   1594   1.1  jonathan }
   1595  1.42  pgoyette 
   1596  1.42  pgoyette /* NetBSD module interface */
   1597  1.42  pgoyette 
   1598  1.42  pgoyette MODULE(MODULE_CLASS_MISC, opencrypto, NULL);
   1599  1.42  pgoyette 
   1600  1.42  pgoyette static int
   1601  1.42  pgoyette opencrypto_modcmd(modcmd_t cmd, void *opaque)
   1602  1.42  pgoyette {
   1603  1.46  pgoyette 	int error = 0;
   1604  1.42  pgoyette 
   1605  1.42  pgoyette 	switch (cmd) {
   1606  1.42  pgoyette 	case MODULE_CMD_INIT:
   1607  1.43  pgoyette #ifdef _MODULE
   1608  1.46  pgoyette 		error = crypto_init();
   1609  1.43  pgoyette #endif
   1610  1.46  pgoyette 		break;
   1611  1.42  pgoyette 	case MODULE_CMD_FINI:
   1612  1.43  pgoyette #ifdef _MODULE
   1613  1.46  pgoyette 		error = crypto_destroy(true);
   1614  1.43  pgoyette #endif
   1615  1.46  pgoyette 		break;
   1616  1.42  pgoyette 	default:
   1617  1.46  pgoyette 		error = ENOTTY;
   1618  1.42  pgoyette 	}
   1619  1.46  pgoyette 	return error;
   1620  1.42  pgoyette }
   1621