Home | History | Annotate | Line # | Download | only in opencrypto
crypto.c revision 1.127
      1  1.127  riastrad /*	$NetBSD: crypto.c,v 1.127 2022/05/22 11:40:03 riastradh 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  1.127  riastrad __KERNEL_RCSID(0, "$NetBSD: crypto.c,v 1.127 2022/05/22 11:40:03 riastradh 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/proc.h>
     62    1.1  jonathan #include <sys/pool.h>
     63    1.1  jonathan #include <sys/kthread.h>
     64   1.11   thorpej #include <sys/once.h>
     65   1.13  christos #include <sys/sysctl.h>
     66   1.21        ad #include <sys/intr.h>
     67   1.42  pgoyette #include <sys/errno.h>
     68   1.42  pgoyette #include <sys/module.h>
     69   1.92  knakahar #include <sys/xcall.h>
     70   1.93  knakahar #include <sys/device.h>
     71   1.96  knakahar #include <sys/cpu.h>
     72   1.95  knakahar #include <sys/percpu.h>
     73   1.96  knakahar #include <sys/kmem.h>
     74    1.1  jonathan 
     75   1.42  pgoyette #if defined(_KERNEL_OPT)
     76   1.23       tls #include "opt_ocf.h"
     77   1.42  pgoyette #endif
     78   1.42  pgoyette 
     79   1.21        ad #include <opencrypto/cryptodev.h>
     80    1.1  jonathan #include <opencrypto/xform.h>			/* XXX for M_XDATA */
     81    1.1  jonathan 
     82    1.1  jonathan /*
     83    1.1  jonathan  * Crypto drivers register themselves by allocating a slot in the
     84    1.1  jonathan  * crypto_drivers table with crypto_get_driverid() and then registering
     85    1.1  jonathan  * each algorithm they support with crypto_register() and crypto_kregister().
     86    1.1  jonathan  */
     87   1.77  knakahar /* Don't directly access crypto_drivers[i], use crypto_checkdriver(i). */
     88   1.98  knakahar static struct {
     89   1.98  knakahar 	kmutex_t mtx;
     90   1.98  knakahar 	int num;
     91   1.98  knakahar 	struct cryptocap *list;
     92   1.98  knakahar } crypto_drv __cacheline_aligned;
     93   1.98  knakahar #define crypto_drv_mtx		(crypto_drv.mtx)
     94   1.98  knakahar #define crypto_drivers_num	(crypto_drv.num)
     95   1.98  knakahar #define crypto_drivers		(crypto_drv.list)
     96   1.98  knakahar 
     97   1.97  knakahar static	void *crypto_q_si;
     98   1.92  knakahar static	void *crypto_ret_si;
     99   1.92  knakahar 
    100    1.1  jonathan /*
    101    1.1  jonathan  * There are two queues for crypto requests; one for symmetric (e.g.
    102    1.1  jonathan  * cipher) operations and one for asymmetric (e.g. MOD) operations.
    103    1.1  jonathan  * See below for how synchronization is handled.
    104    1.1  jonathan  */
    105   1.95  knakahar TAILQ_HEAD(crypto_crp_q, cryptop);
    106   1.95  knakahar TAILQ_HEAD(crypto_crp_kq, cryptkop);
    107   1.95  knakahar struct crypto_crp_qs {
    108  1.101  knakahar 	struct crypto_crp_q *crp_q;
    109  1.101  knakahar 	struct crypto_crp_kq *crp_kq;
    110   1.95  knakahar };
    111   1.95  knakahar static percpu_t *crypto_crp_qs_percpu;
    112   1.95  knakahar 
    113   1.95  knakahar static inline struct crypto_crp_qs *
    114   1.95  knakahar crypto_get_crp_qs(int *s)
    115   1.95  knakahar {
    116   1.95  knakahar 
    117   1.95  knakahar 	KASSERT(s != NULL);
    118   1.95  knakahar 
    119   1.95  knakahar 	*s = splsoftnet();
    120   1.95  knakahar 	return percpu_getref(crypto_crp_qs_percpu);
    121   1.95  knakahar }
    122   1.95  knakahar 
    123   1.95  knakahar static inline void
    124   1.95  knakahar crypto_put_crp_qs(int *s)
    125   1.95  knakahar {
    126   1.95  knakahar 
    127   1.95  knakahar 	KASSERT(s != NULL);
    128   1.95  knakahar 
    129   1.95  knakahar 	percpu_putref(crypto_crp_qs_percpu);
    130   1.95  knakahar 	splx(*s);
    131   1.95  knakahar }
    132   1.95  knakahar 
    133   1.95  knakahar static void
    134   1.95  knakahar crypto_crp_q_is_busy_pc(void *p, void *arg, struct cpu_info *ci __unused)
    135   1.95  knakahar {
    136   1.95  knakahar 	struct crypto_crp_qs *qs_pc = p;
    137   1.95  knakahar 	bool *isempty = arg;
    138   1.95  knakahar 
    139  1.101  knakahar 	if (!TAILQ_EMPTY(qs_pc->crp_q) || !TAILQ_EMPTY(qs_pc->crp_kq))
    140   1.95  knakahar 		*isempty = true;
    141   1.95  knakahar }
    142   1.95  knakahar 
    143   1.95  knakahar static void
    144   1.95  knakahar crypto_crp_qs_init_pc(void *p, void *arg __unused, struct cpu_info *ci __unused)
    145   1.95  knakahar {
    146   1.95  knakahar 	struct crypto_crp_qs *qs = p;
    147   1.95  knakahar 
    148  1.101  knakahar 	qs->crp_q = kmem_alloc(sizeof(struct crypto_crp_q), KM_SLEEP);
    149  1.101  knakahar 	qs->crp_kq = kmem_alloc(sizeof(struct crypto_crp_kq), KM_SLEEP);
    150  1.101  knakahar 
    151  1.101  knakahar 	TAILQ_INIT(qs->crp_q);
    152  1.101  knakahar 	TAILQ_INIT(qs->crp_kq);
    153   1.95  knakahar }
    154    1.1  jonathan 
    155    1.1  jonathan /*
    156    1.1  jonathan  * There are two queues for processing completed crypto requests; one
    157    1.1  jonathan  * for the symmetric and one for the asymmetric ops.  We only need one
    158    1.1  jonathan  * but have two to avoid type futzing (cryptop vs. cryptkop).  See below
    159    1.1  jonathan  * for how synchronization is handled.
    160    1.1  jonathan  */
    161   1.96  knakahar TAILQ_HEAD(crypto_crp_ret_q, cryptop);
    162   1.96  knakahar TAILQ_HEAD(crypto_crp_ret_kq, cryptkop);
    163   1.96  knakahar struct crypto_crp_ret_qs {
    164   1.96  knakahar 	kmutex_t crp_ret_q_mtx;
    165   1.96  knakahar 	bool crp_ret_q_exit_flag;
    166   1.96  knakahar 
    167   1.96  knakahar 	struct crypto_crp_ret_q crp_ret_q;
    168   1.96  knakahar 	int crp_ret_q_len;
    169   1.96  knakahar 	int crp_ret_q_maxlen; /* queue length limit. <=0 means unlimited. */
    170   1.96  knakahar 	int crp_ret_q_drops;
    171   1.96  knakahar 
    172   1.96  knakahar 	struct crypto_crp_ret_kq crp_ret_kq;
    173   1.96  knakahar 	int crp_ret_kq_len;
    174   1.96  knakahar 	int crp_ret_kq_maxlen; /* queue length limit. <=0 means unlimited. */
    175   1.96  knakahar 	int crp_ret_kq_drops;
    176   1.96  knakahar };
    177   1.96  knakahar struct crypto_crp_ret_qs **crypto_crp_ret_qs_list;
    178    1.1  jonathan 
    179   1.73  knakahar 
    180   1.96  knakahar static inline struct crypto_crp_ret_qs *
    181   1.96  knakahar crypto_get_crp_ret_qs(struct cpu_info *ci)
    182   1.96  knakahar {
    183   1.96  knakahar 	u_int cpuid;
    184   1.96  knakahar 	struct crypto_crp_ret_qs *qs;
    185   1.73  knakahar 
    186   1.96  knakahar 	KASSERT(ci != NULL);
    187   1.73  knakahar 
    188   1.96  knakahar 	cpuid = cpu_index(ci);
    189   1.96  knakahar 	qs = crypto_crp_ret_qs_list[cpuid];
    190   1.96  knakahar 	mutex_enter(&qs->crp_ret_q_mtx);
    191   1.96  knakahar 	return qs;
    192   1.96  knakahar }
    193   1.73  knakahar 
    194   1.96  knakahar static inline void
    195   1.96  knakahar crypto_put_crp_ret_qs(struct cpu_info *ci)
    196   1.96  knakahar {
    197   1.96  knakahar 	u_int cpuid;
    198   1.96  knakahar 	struct crypto_crp_ret_qs *qs;
    199   1.73  knakahar 
    200   1.96  knakahar 	KASSERT(ci != NULL);
    201   1.74  knakahar 
    202   1.96  knakahar 	cpuid = cpu_index(ci);
    203   1.96  knakahar 	qs = crypto_crp_ret_qs_list[cpuid];
    204   1.96  knakahar 	mutex_exit(&qs->crp_ret_q_mtx);
    205   1.96  knakahar }
    206   1.73  knakahar 
    207   1.75  knakahar #ifndef CRYPTO_RET_Q_MAXLEN
    208   1.75  knakahar #define CRYPTO_RET_Q_MAXLEN 0
    209   1.75  knakahar #endif
    210   1.75  knakahar #ifndef CRYPTO_RET_KQ_MAXLEN
    211   1.75  knakahar #define CRYPTO_RET_KQ_MAXLEN 0
    212   1.75  knakahar #endif
    213   1.73  knakahar 
    214   1.73  knakahar static int
    215   1.73  knakahar sysctl_opencrypto_q_len(SYSCTLFN_ARGS)
    216   1.73  knakahar {
    217   1.96  knakahar 	int error, len = 0;
    218   1.96  knakahar 	struct sysctlnode node = *rnode;
    219   1.96  knakahar 
    220   1.96  knakahar 	for (int i = 0; i < ncpu; i++) {
    221   1.96  knakahar 		struct crypto_crp_ret_qs *qs;
    222   1.96  knakahar 		struct cpu_info *ci = cpu_lookup(i);
    223   1.96  knakahar 
    224   1.96  knakahar 		qs = crypto_get_crp_ret_qs(ci);
    225   1.96  knakahar 		len += qs->crp_ret_q_len;
    226   1.96  knakahar 		crypto_put_crp_ret_qs(ci);
    227   1.96  knakahar 	}
    228   1.73  knakahar 
    229   1.96  knakahar 	node.sysctl_data = &len;
    230   1.96  knakahar 	error = sysctl_lookup(SYSCTLFN_CALL(&node));
    231   1.73  knakahar 	if (error || newp == NULL)
    232   1.73  knakahar 		return error;
    233   1.73  knakahar 
    234   1.73  knakahar 	return 0;
    235   1.73  knakahar }
    236   1.73  knakahar 
    237   1.73  knakahar static int
    238   1.73  knakahar sysctl_opencrypto_q_drops(SYSCTLFN_ARGS)
    239   1.73  knakahar {
    240   1.96  knakahar 	int error, drops = 0;
    241   1.96  knakahar 	struct sysctlnode node = *rnode;
    242   1.96  knakahar 
    243   1.96  knakahar 	for (int i = 0; i < ncpu; i++) {
    244   1.96  knakahar 		struct crypto_crp_ret_qs *qs;
    245   1.96  knakahar 		struct cpu_info *ci = cpu_lookup(i);
    246   1.96  knakahar 
    247   1.96  knakahar 		qs = crypto_get_crp_ret_qs(ci);
    248   1.96  knakahar 		drops += qs->crp_ret_q_drops;
    249   1.96  knakahar 		crypto_put_crp_ret_qs(ci);
    250   1.96  knakahar 	}
    251   1.73  knakahar 
    252   1.96  knakahar 	node.sysctl_data = &drops;
    253   1.96  knakahar 	error = sysctl_lookup(SYSCTLFN_CALL(&node));
    254   1.73  knakahar 	if (error || newp == NULL)
    255   1.73  knakahar 		return error;
    256   1.73  knakahar 
    257   1.73  knakahar 	return 0;
    258   1.73  knakahar }
    259   1.73  knakahar 
    260   1.73  knakahar static int
    261   1.73  knakahar sysctl_opencrypto_q_maxlen(SYSCTLFN_ARGS)
    262   1.73  knakahar {
    263   1.96  knakahar 	int error, maxlen;
    264   1.96  knakahar 	struct crypto_crp_ret_qs *qs;
    265   1.96  knakahar 	struct sysctlnode node = *rnode;
    266   1.96  knakahar 
    267   1.96  knakahar 	/* each crp_ret_kq_maxlen is the same. */
    268   1.96  knakahar 	qs = crypto_get_crp_ret_qs(curcpu());
    269   1.96  knakahar 	maxlen = qs->crp_ret_q_maxlen;
    270   1.96  knakahar 	crypto_put_crp_ret_qs(curcpu());
    271   1.96  knakahar 
    272   1.96  knakahar 	node.sysctl_data = &maxlen;
    273   1.96  knakahar 	error = sysctl_lookup(SYSCTLFN_CALL(&node));
    274   1.96  knakahar 	if (error || newp == NULL)
    275   1.96  knakahar 		return error;
    276   1.96  knakahar 
    277   1.96  knakahar 	for (int i = 0; i < ncpu; i++) {
    278   1.96  knakahar 		struct cpu_info *ci = cpu_lookup(i);
    279   1.96  knakahar 
    280   1.96  knakahar 		qs = crypto_get_crp_ret_qs(ci);
    281   1.96  knakahar 		qs->crp_ret_q_maxlen = maxlen;
    282   1.96  knakahar 		crypto_put_crp_ret_qs(ci);
    283   1.96  knakahar 	}
    284   1.96  knakahar 
    285   1.96  knakahar 	return 0;
    286   1.96  knakahar }
    287   1.96  knakahar 
    288   1.96  knakahar static int
    289   1.96  knakahar sysctl_opencrypto_kq_len(SYSCTLFN_ARGS)
    290   1.96  knakahar {
    291   1.96  knakahar 	int error, len = 0;
    292   1.96  knakahar 	struct sysctlnode node = *rnode;
    293   1.96  knakahar 
    294   1.96  knakahar 	for (int i = 0; i < ncpu; i++) {
    295   1.96  knakahar 		struct crypto_crp_ret_qs *qs;
    296   1.96  knakahar 		struct cpu_info *ci = cpu_lookup(i);
    297   1.96  knakahar 
    298   1.96  knakahar 		qs = crypto_get_crp_ret_qs(ci);
    299   1.96  knakahar 		len += qs->crp_ret_kq_len;
    300   1.96  knakahar 		crypto_put_crp_ret_qs(ci);
    301   1.96  knakahar 	}
    302   1.96  knakahar 
    303   1.96  knakahar 	node.sysctl_data = &len;
    304   1.96  knakahar 	error = sysctl_lookup(SYSCTLFN_CALL(&node));
    305   1.96  knakahar 	if (error || newp == NULL)
    306   1.96  knakahar 		return error;
    307   1.96  knakahar 
    308   1.96  knakahar 	return 0;
    309   1.96  knakahar }
    310   1.96  knakahar 
    311   1.96  knakahar static int
    312   1.96  knakahar sysctl_opencrypto_kq_drops(SYSCTLFN_ARGS)
    313   1.96  knakahar {
    314   1.96  knakahar 	int error, drops = 0;
    315   1.96  knakahar 	struct sysctlnode node = *rnode;
    316   1.96  knakahar 
    317   1.96  knakahar 	for (int i = 0; i < ncpu; i++) {
    318   1.96  knakahar 		struct crypto_crp_ret_qs *qs;
    319   1.96  knakahar 		struct cpu_info *ci = cpu_lookup(i);
    320   1.96  knakahar 
    321   1.96  knakahar 		qs = crypto_get_crp_ret_qs(ci);
    322   1.96  knakahar 		drops += qs->crp_ret_kq_drops;
    323   1.96  knakahar 		crypto_put_crp_ret_qs(ci);
    324   1.96  knakahar 	}
    325   1.96  knakahar 
    326   1.96  knakahar 	node.sysctl_data = &drops;
    327   1.96  knakahar 	error = sysctl_lookup(SYSCTLFN_CALL(&node));
    328   1.96  knakahar 	if (error || newp == NULL)
    329   1.96  knakahar 		return error;
    330   1.96  knakahar 
    331   1.96  knakahar 	return 0;
    332   1.96  knakahar }
    333   1.96  knakahar 
    334   1.96  knakahar static int
    335   1.96  knakahar sysctl_opencrypto_kq_maxlen(SYSCTLFN_ARGS)
    336   1.96  knakahar {
    337   1.96  knakahar 	int error, maxlen;
    338   1.96  knakahar 	struct crypto_crp_ret_qs *qs;
    339   1.96  knakahar 	struct sysctlnode node = *rnode;
    340   1.96  knakahar 
    341   1.96  knakahar 	/* each crp_ret_kq_maxlen is the same. */
    342   1.96  knakahar 	qs = crypto_get_crp_ret_qs(curcpu());
    343   1.96  knakahar 	maxlen = qs->crp_ret_kq_maxlen;
    344   1.96  knakahar 	crypto_put_crp_ret_qs(curcpu());
    345   1.73  knakahar 
    346   1.96  knakahar 	node.sysctl_data = &maxlen;
    347   1.96  knakahar 	error = sysctl_lookup(SYSCTLFN_CALL(&node));
    348   1.73  knakahar 	if (error || newp == NULL)
    349   1.73  knakahar 		return error;
    350   1.73  knakahar 
    351   1.96  knakahar 	for (int i = 0; i < ncpu; i++) {
    352   1.96  knakahar 		struct cpu_info *ci = cpu_lookup(i);
    353   1.96  knakahar 
    354   1.96  knakahar 		qs = crypto_get_crp_ret_qs(ci);
    355   1.96  knakahar 		qs->crp_ret_kq_maxlen = maxlen;
    356   1.96  knakahar 		crypto_put_crp_ret_qs(ci);
    357   1.96  knakahar 	}
    358   1.96  knakahar 
    359   1.73  knakahar 	return 0;
    360   1.73  knakahar }
    361   1.73  knakahar 
    362    1.1  jonathan /*
    363  1.105  knakahar  * Crypto op and descriptor data structures are allocated
    364    1.1  jonathan  * from separate private zones(FreeBSD)/pools(netBSD/OpenBSD) .
    365    1.1  jonathan  */
    366  1.100  knakahar static pool_cache_t cryptop_cache;
    367  1.100  knakahar static pool_cache_t cryptodesc_cache;
    368  1.100  knakahar static pool_cache_t cryptkop_cache;
    369    1.1  jonathan 
    370    1.1  jonathan int	crypto_usercrypto = 1;		/* userland may open /dev/crypto */
    371    1.1  jonathan int	crypto_userasymcrypto = 1;	/* userland may do asym crypto reqs */
    372   1.10     perry /*
    373    1.6  jonathan  * cryptodevallowsoft is (intended to be) sysctl'able, controlling
    374    1.6  jonathan  * access to hardware versus software transforms as below:
    375    1.6  jonathan  *
    376    1.6  jonathan  * crypto_devallowsoft < 0:  Force userlevel requests to use software
    377    1.6  jonathan  *                              transforms, always
    378    1.6  jonathan  * crypto_devallowsoft = 0:  Use hardware if present, grant userlevel
    379    1.6  jonathan  *                              requests for non-accelerated transforms
    380    1.6  jonathan  *                              (handling the latter in software)
    381    1.6  jonathan  * crypto_devallowsoft > 0:  Allow user requests only for transforms which
    382    1.6  jonathan  *                               are hardware-accelerated.
    383    1.6  jonathan  */
    384    1.9  jonathan int	crypto_devallowsoft = 1;	/* only use hardware crypto */
    385    1.6  jonathan 
    386  1.114  pgoyette static void
    387  1.114  pgoyette sysctl_opencrypto_setup(struct sysctllog **clog)
    388   1.13  christos {
    389   1.73  knakahar 	const struct sysctlnode *ocnode;
    390   1.73  knakahar 	const struct sysctlnode *retqnode, *retkqnode;
    391   1.45     pooka 
    392   1.13  christos 	sysctl_createv(clog, 0, NULL, NULL,
    393   1.13  christos 		       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
    394   1.13  christos 		       CTLTYPE_INT, "usercrypto",
    395   1.13  christos 		       SYSCTL_DESCR("Enable/disable user-mode access to "
    396   1.13  christos 			   "crypto support"),
    397   1.13  christos 		       NULL, 0, &crypto_usercrypto, 0,
    398   1.13  christos 		       CTL_KERN, CTL_CREATE, CTL_EOL);
    399   1.13  christos 	sysctl_createv(clog, 0, NULL, NULL,
    400   1.13  christos 		       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
    401   1.13  christos 		       CTLTYPE_INT, "userasymcrypto",
    402   1.13  christos 		       SYSCTL_DESCR("Enable/disable user-mode access to "
    403   1.13  christos 			   "asymmetric crypto support"),
    404   1.13  christos 		       NULL, 0, &crypto_userasymcrypto, 0,
    405   1.13  christos 		       CTL_KERN, CTL_CREATE, CTL_EOL);
    406   1.13  christos 	sysctl_createv(clog, 0, NULL, NULL,
    407   1.13  christos 		       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
    408   1.13  christos 		       CTLTYPE_INT, "cryptodevallowsoft",
    409   1.13  christos 		       SYSCTL_DESCR("Enable/disable use of software "
    410   1.13  christos 			   "asymmetric crypto support"),
    411   1.13  christos 		       NULL, 0, &crypto_devallowsoft, 0,
    412   1.13  christos 		       CTL_KERN, CTL_CREATE, CTL_EOL);
    413   1.73  knakahar 
    414   1.73  knakahar 	sysctl_createv(clog, 0, NULL, &ocnode,
    415   1.73  knakahar 		       CTLFLAG_PERMANENT,
    416   1.73  knakahar 		       CTLTYPE_NODE, "opencrypto",
    417   1.73  knakahar 		       SYSCTL_DESCR("opencrypto related entries"),
    418   1.73  knakahar 		       NULL, 0, NULL, 0,
    419   1.73  knakahar 		       CTL_CREATE, CTL_EOL);
    420   1.73  knakahar 
    421   1.73  knakahar 	sysctl_createv(clog, 0, &ocnode, &retqnode,
    422   1.73  knakahar 		       CTLFLAG_PERMANENT,
    423   1.73  knakahar 		       CTLTYPE_NODE, "crypto_ret_q",
    424   1.73  knakahar 		       SYSCTL_DESCR("crypto_ret_q related entries"),
    425   1.73  knakahar 		       NULL, 0, NULL, 0,
    426   1.73  knakahar 		       CTL_CREATE, CTL_EOL);
    427   1.73  knakahar 	sysctl_createv(clog, 0, &retqnode, NULL,
    428   1.73  knakahar 		       CTLFLAG_PERMANENT|CTLFLAG_READONLY,
    429   1.73  knakahar 		       CTLTYPE_INT, "len",
    430   1.73  knakahar 		       SYSCTL_DESCR("Current queue length"),
    431   1.73  knakahar 		       sysctl_opencrypto_q_len, 0,
    432   1.96  knakahar 		       NULL, 0,
    433   1.73  knakahar 		       CTL_CREATE, CTL_EOL);
    434   1.73  knakahar 	sysctl_createv(clog, 0, &retqnode, NULL,
    435   1.73  knakahar 		       CTLFLAG_PERMANENT|CTLFLAG_READONLY,
    436   1.73  knakahar 		       CTLTYPE_INT, "drops",
    437   1.73  knakahar 		       SYSCTL_DESCR("Crypto requests dropped due to full ret queue"),
    438   1.73  knakahar 		       sysctl_opencrypto_q_drops, 0,
    439   1.96  knakahar 		       NULL, 0,
    440   1.73  knakahar 		       CTL_CREATE, CTL_EOL);
    441   1.73  knakahar 	sysctl_createv(clog, 0, &retqnode, NULL,
    442   1.73  knakahar 		       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
    443   1.73  knakahar 		       CTLTYPE_INT, "maxlen",
    444   1.73  knakahar 		       SYSCTL_DESCR("Maximum allowed queue length"),
    445   1.73  knakahar 		       sysctl_opencrypto_q_maxlen, 0,
    446   1.96  knakahar 		       NULL, 0,
    447   1.73  knakahar 		       CTL_CREATE, CTL_EOL);
    448   1.73  knakahar 
    449   1.96  knakahar 
    450   1.73  knakahar 	sysctl_createv(clog, 0, &ocnode, &retkqnode,
    451   1.73  knakahar 		       CTLFLAG_PERMANENT,
    452   1.73  knakahar 		       CTLTYPE_NODE, "crypto_ret_kq",
    453   1.73  knakahar 		       SYSCTL_DESCR("crypto_ret_kq related entries"),
    454   1.73  knakahar 		       NULL, 0, NULL, 0,
    455   1.73  knakahar 		       CTL_CREATE, CTL_EOL);
    456   1.73  knakahar 	sysctl_createv(clog, 0, &retkqnode, NULL,
    457   1.73  knakahar 		       CTLFLAG_PERMANENT|CTLFLAG_READONLY,
    458   1.73  knakahar 		       CTLTYPE_INT, "len",
    459   1.73  knakahar 		       SYSCTL_DESCR("Current queue length"),
    460   1.96  knakahar 		       sysctl_opencrypto_kq_len, 0,
    461   1.96  knakahar 		       NULL, 0,
    462   1.73  knakahar 		       CTL_CREATE, CTL_EOL);
    463   1.73  knakahar 	sysctl_createv(clog, 0, &retkqnode, NULL,
    464   1.73  knakahar 		       CTLFLAG_PERMANENT|CTLFLAG_READONLY,
    465   1.73  knakahar 		       CTLTYPE_INT, "drops",
    466   1.73  knakahar 		       SYSCTL_DESCR("Crypto requests dropped due to full ret queue"),
    467   1.96  knakahar 		       sysctl_opencrypto_kq_drops, 0,
    468   1.96  knakahar 		       NULL, 0,
    469   1.73  knakahar 		       CTL_CREATE, CTL_EOL);
    470   1.73  knakahar 	sysctl_createv(clog, 0, &retkqnode, NULL,
    471   1.73  knakahar 		       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
    472   1.73  knakahar 		       CTLTYPE_INT, "maxlen",
    473   1.73  knakahar 		       SYSCTL_DESCR("Maximum allowed queue length"),
    474   1.96  knakahar 		       sysctl_opencrypto_kq_maxlen, 0,
    475   1.96  knakahar 		       NULL, 0,
    476   1.73  knakahar 		       CTL_CREATE, CTL_EOL);
    477   1.13  christos }
    478    1.1  jonathan 
    479    1.1  jonathan /*
    480    1.1  jonathan  * Synchronization: read carefully, this is non-trivial.
    481    1.1  jonathan  *
    482    1.1  jonathan  * Crypto requests are submitted via crypto_dispatch.  Typically
    483    1.1  jonathan  * these come in from network protocols at spl0 (output path) or
    484    1.1  jonathan  * spl[,soft]net (input path).
    485    1.1  jonathan  *
    486    1.1  jonathan  * Requests are typically passed on the driver directly, but they
    487    1.1  jonathan  * may also be queued for processing by a software interrupt thread,
    488   1.10     perry  * cryptointr, that runs at splsoftcrypto.  This thread dispatches
    489    1.1  jonathan  * the requests to crypto drivers (h/w or s/w) who call crypto_done
    490    1.1  jonathan  * when a request is complete.  Hardware crypto drivers are assumed
    491    1.1  jonathan  * to register their IRQ's as network devices so their interrupt handlers
    492    1.1  jonathan  * and subsequent "done callbacks" happen at spl[imp,net].
    493    1.1  jonathan  *
    494    1.1  jonathan  * Completed crypto ops are queued for a separate kernel thread that
    495    1.1  jonathan  * handles the callbacks at spl0.  This decoupling insures the crypto
    496    1.1  jonathan  * driver interrupt service routine is not delayed while the callback
    497    1.1  jonathan  * takes place and that callbacks are delivered after a context switch
    498    1.1  jonathan  * (as opposed to a software interrupt that clients must block).
    499    1.1  jonathan  *
    500    1.1  jonathan  * This scheme is not intended for SMP machines.
    501   1.10     perry  */
    502   1.97  knakahar static	void cryptointr(void *);	/* swi thread to dispatch ops */
    503   1.92  knakahar static	void cryptoret_softint(void *);	/* kernel thread for callbacks*/
    504   1.46  pgoyette static	int crypto_destroy(bool);
    505    1.1  jonathan static	int crypto_invoke(struct cryptop *crp, int hint);
    506    1.1  jonathan static	int crypto_kinvoke(struct cryptkop *krp, int hint);
    507    1.1  jonathan 
    508   1.81  knakahar static struct cryptocap *crypto_checkdriver_lock(u_int32_t);
    509   1.79  knakahar static struct cryptocap *crypto_checkdriver_uninit(u_int32_t);
    510   1.86  christos static struct cryptocap *crypto_checkdriver(u_int32_t);
    511   1.81  knakahar static void crypto_driver_lock(struct cryptocap *);
    512   1.81  knakahar static void crypto_driver_unlock(struct cryptocap *);
    513   1.81  knakahar static void crypto_driver_clear(struct cryptocap *);
    514   1.77  knakahar 
    515   1.93  knakahar static int crypto_init_finalize(device_t);
    516   1.93  knakahar 
    517    1.1  jonathan static struct cryptostats cryptostats;
    518   1.23       tls #ifdef CRYPTO_TIMING
    519    1.1  jonathan static	int crypto_timing = 0;
    520   1.23       tls #endif
    521    1.1  jonathan 
    522  1.114  pgoyette static struct sysctllog *sysctl_opencrypto_clog;
    523  1.114  pgoyette 
    524  1.109       chs static void
    525   1.96  knakahar crypto_crp_ret_qs_init(void)
    526   1.96  knakahar {
    527  1.109       chs 	int i;
    528   1.96  knakahar 
    529   1.96  knakahar 	crypto_crp_ret_qs_list = kmem_alloc(sizeof(struct crypto_crp_ret_qs *) * ncpu,
    530  1.109       chs 	    KM_SLEEP);
    531   1.96  knakahar 
    532   1.96  knakahar 	for (i = 0; i < ncpu; i++) {
    533   1.96  knakahar 		struct crypto_crp_ret_qs *qs;
    534   1.96  knakahar 
    535  1.109       chs 		qs = kmem_alloc(sizeof(struct crypto_crp_ret_qs), KM_SLEEP);
    536   1.96  knakahar 		mutex_init(&qs->crp_ret_q_mtx, MUTEX_DEFAULT, IPL_NET);
    537   1.96  knakahar 		qs->crp_ret_q_exit_flag = false;
    538   1.96  knakahar 
    539   1.96  knakahar 		TAILQ_INIT(&qs->crp_ret_q);
    540   1.96  knakahar 		qs->crp_ret_q_len = 0;
    541   1.96  knakahar 		qs->crp_ret_q_maxlen = CRYPTO_RET_Q_MAXLEN;
    542   1.96  knakahar 		qs->crp_ret_q_drops = 0;
    543   1.96  knakahar 
    544   1.96  knakahar 		TAILQ_INIT(&qs->crp_ret_kq);
    545   1.96  knakahar 		qs->crp_ret_kq_len = 0;
    546   1.96  knakahar 		qs->crp_ret_kq_maxlen = CRYPTO_RET_KQ_MAXLEN;
    547   1.96  knakahar 		qs->crp_ret_kq_drops = 0;
    548   1.96  knakahar 
    549   1.96  knakahar 		crypto_crp_ret_qs_list[i] = qs;
    550   1.96  knakahar 	}
    551   1.96  knakahar }
    552   1.96  knakahar 
    553   1.96  knakahar static int
    554   1.11   thorpej crypto_init0(void)
    555    1.1  jonathan {
    556    1.1  jonathan 
    557   1.57  knakahar 	mutex_init(&crypto_drv_mtx, MUTEX_DEFAULT, IPL_NONE);
    558  1.100  knakahar 	cryptop_cache = pool_cache_init(sizeof(struct cryptop),
    559  1.100  knakahar 	    coherency_unit, 0, 0, "cryptop", NULL, IPL_NET, NULL, NULL, NULL);
    560  1.100  knakahar 	cryptodesc_cache = pool_cache_init(sizeof(struct cryptodesc),
    561  1.100  knakahar 	    coherency_unit, 0, 0, "cryptdesc", NULL, IPL_NET, NULL, NULL, NULL);
    562  1.100  knakahar 	cryptkop_cache = pool_cache_init(sizeof(struct cryptkop),
    563  1.100  knakahar 	    coherency_unit, 0, 0, "cryptkop", NULL, IPL_NET, NULL, NULL, NULL);
    564    1.1  jonathan 
    565  1.111  riastrad 	crypto_crp_qs_percpu = percpu_create(sizeof(struct crypto_crp_qs),
    566  1.111  riastrad 	    crypto_crp_qs_init_pc, /*XXX*/NULL, NULL);
    567   1.95  knakahar 
    568  1.109       chs 	crypto_crp_ret_qs_init();
    569   1.96  knakahar 
    570   1.99  knakahar 	crypto_drivers = kmem_zalloc(CRYPTO_DRIVERS_INITIAL *
    571  1.109       chs 	    sizeof(struct cryptocap), KM_SLEEP);
    572   1.11   thorpej 	crypto_drivers_num = CRYPTO_DRIVERS_INITIAL;
    573    1.1  jonathan 
    574   1.97  knakahar 	crypto_q_si = softint_establish(SOFTINT_NET|SOFTINT_MPSAFE, cryptointr, NULL);
    575   1.97  knakahar 	if (crypto_q_si == NULL) {
    576   1.92  knakahar 		printf("crypto_init: cannot establish request queue handler\n");
    577   1.92  knakahar 		return crypto_destroy(false);
    578   1.92  knakahar 	}
    579   1.92  knakahar 
    580   1.93  knakahar 	/*
    581   1.94  knakahar 	 * Some encryption devices (such as mvcesa) are attached before
    582   1.94  knakahar 	 * ipi_sysinit(). That causes an assertion in ipi_register() as
    583   1.93  knakahar 	 * crypto_ret_si softint uses SOFTINT_RCPU.
    584   1.93  knakahar 	 */
    585   1.93  knakahar 	if (config_finalize_register(NULL, crypto_init_finalize) != 0) {
    586   1.93  knakahar 		printf("crypto_init: cannot register crypto_init_finalize\n");
    587   1.46  pgoyette 		return crypto_destroy(false);
    588    1.1  jonathan 	}
    589   1.20        ad 
    590  1.114  pgoyette 	sysctl_opencrypto_setup(&sysctl_opencrypto_clog);
    591  1.114  pgoyette 
    592   1.12      yamt 	return 0;
    593   1.11   thorpej }
    594   1.11   thorpej 
    595   1.93  knakahar static int
    596   1.93  knakahar crypto_init_finalize(device_t self __unused)
    597   1.93  knakahar {
    598   1.93  knakahar 
    599   1.93  knakahar 	crypto_ret_si = softint_establish(SOFTINT_NET|SOFTINT_MPSAFE|SOFTINT_RCPU,
    600   1.93  knakahar 	    &cryptoret_softint, NULL);
    601   1.93  knakahar 	KASSERT(crypto_ret_si != NULL);
    602   1.93  knakahar 
    603   1.93  knakahar 	return 0;
    604   1.93  knakahar }
    605   1.93  knakahar 
    606   1.46  pgoyette int
    607   1.11   thorpej crypto_init(void)
    608   1.11   thorpej {
    609   1.18    daniel 	static ONCE_DECL(crypto_init_once);
    610   1.11   thorpej 
    611   1.46  pgoyette 	return RUN_ONCE(&crypto_init_once, crypto_init0);
    612    1.1  jonathan }
    613    1.1  jonathan 
    614   1.46  pgoyette static int
    615   1.46  pgoyette crypto_destroy(bool exit_kthread)
    616    1.1  jonathan {
    617   1.46  pgoyette 	int i;
    618   1.46  pgoyette 
    619   1.46  pgoyette 	if (exit_kthread) {
    620   1.77  knakahar 		struct cryptocap *cap = NULL;
    621   1.95  knakahar 		bool is_busy = false;
    622   1.77  knakahar 
    623   1.46  pgoyette 		/* if we have any in-progress requests, don't unload */
    624   1.95  knakahar 		percpu_foreach(crypto_crp_qs_percpu, crypto_crp_q_is_busy_pc,
    625   1.95  knakahar 				   &is_busy);
    626   1.95  knakahar 		if (is_busy)
    627   1.46  pgoyette 			return EBUSY;
    628   1.81  knakahar 		/* FIXME:
    629   1.81  knakahar 		 * prohibit enqueue to crp_q and crp_kq after here.
    630   1.81  knakahar 		 */
    631   1.46  pgoyette 
    632   1.81  knakahar 		mutex_enter(&crypto_drv_mtx);
    633   1.77  knakahar 		for (i = 0; i < crypto_drivers_num; i++) {
    634   1.86  christos 			cap = crypto_checkdriver(i);
    635   1.77  knakahar 			if (cap == NULL)
    636   1.77  knakahar 				continue;
    637   1.81  knakahar 			if (cap->cc_sessions != 0) {
    638   1.81  knakahar 				mutex_exit(&crypto_drv_mtx);
    639   1.81  knakahar 				return EBUSY;
    640   1.81  knakahar 			}
    641   1.51  knakahar 		}
    642   1.81  knakahar 		mutex_exit(&crypto_drv_mtx);
    643   1.81  knakahar 		/* FIXME:
    644   1.81  knakahar 		 * prohibit touch crypto_drivers[] and each element after here.
    645   1.81  knakahar 		 */
    646   1.46  pgoyette 
    647  1.112  riastrad 		/* Ensure cryptoret_softint() is never scheduled again.  */
    648   1.96  knakahar 		for (i = 0; i < ncpu; i++) {
    649   1.96  knakahar 			struct crypto_crp_ret_qs *qs;
    650   1.96  knakahar 			struct cpu_info *ci = cpu_lookup(i);
    651   1.96  knakahar 
    652   1.96  knakahar 			qs = crypto_get_crp_ret_qs(ci);
    653   1.96  knakahar 			qs->crp_ret_q_exit_flag = true;
    654   1.96  knakahar 			crypto_put_crp_ret_qs(ci);
    655   1.96  knakahar 		}
    656   1.46  pgoyette 	}
    657   1.46  pgoyette 
    658  1.114  pgoyette 	if (sysctl_opencrypto_clog != NULL)
    659  1.114  pgoyette 		sysctl_teardown(&sysctl_opencrypto_clog);
    660  1.114  pgoyette 
    661   1.92  knakahar 	if (crypto_ret_si != NULL)
    662   1.92  knakahar 		softint_disestablish(crypto_ret_si);
    663   1.92  knakahar 
    664   1.97  knakahar 	if (crypto_q_si != NULL)
    665   1.97  knakahar 		softint_disestablish(crypto_q_si);
    666   1.46  pgoyette 
    667   1.57  knakahar 	mutex_enter(&crypto_drv_mtx);
    668    1.1  jonathan 	if (crypto_drivers != NULL)
    669   1.99  knakahar 		kmem_free(crypto_drivers,
    670   1.99  knakahar 		    crypto_drivers_num * sizeof(struct cryptocap));
    671   1.57  knakahar 	mutex_exit(&crypto_drv_mtx);
    672   1.46  pgoyette 
    673   1.95  knakahar 	percpu_free(crypto_crp_qs_percpu, sizeof(struct crypto_crp_qs));
    674   1.95  knakahar 
    675  1.100  knakahar 	pool_cache_destroy(cryptop_cache);
    676  1.100  knakahar 	pool_cache_destroy(cryptodesc_cache);
    677  1.100  knakahar 	pool_cache_destroy(cryptkop_cache);
    678   1.46  pgoyette 
    679   1.57  knakahar 	mutex_destroy(&crypto_drv_mtx);
    680   1.46  pgoyette 
    681   1.46  pgoyette 	return 0;
    682    1.1  jonathan }
    683    1.1  jonathan 
    684   1.88  knakahar static bool
    685   1.88  knakahar crypto_driver_suitable(struct cryptocap *cap, struct cryptoini *cri)
    686    1.1  jonathan {
    687    1.1  jonathan 	struct cryptoini *cr;
    688    1.1  jonathan 
    689   1.88  knakahar 	for (cr = cri; cr; cr = cr->cri_next)
    690   1.88  knakahar 		if (cap->cc_alg[cr->cri_alg] == 0) {
    691   1.88  knakahar 			DPRINTF("alg %d not supported\n", cr->cri_alg);
    692   1.88  knakahar 			return false;
    693   1.88  knakahar 		}
    694   1.88  knakahar 
    695   1.88  knakahar 	return true;
    696   1.88  knakahar }
    697    1.1  jonathan 
    698   1.89  knakahar #define CRYPTO_ACCEPT_HARDWARE 0x1
    699   1.89  knakahar #define CRYPTO_ACCEPT_SOFTWARE 0x2
    700   1.88  knakahar /*
    701   1.88  knakahar  * The algorithm we use here is pretty stupid; just use the
    702   1.88  knakahar  * first driver that supports all the algorithms we need.
    703   1.89  knakahar  * If there are multiple drivers we choose the driver with
    704   1.89  knakahar  * the fewest active sessions. We prefer hardware-backed
    705   1.89  knakahar  * drivers to software ones.
    706   1.88  knakahar  *
    707   1.88  knakahar  * XXX We need more smarts here (in real life too, but that's
    708   1.88  knakahar  * XXX another story altogether).
    709   1.88  knakahar  */
    710   1.88  knakahar static struct cryptocap *
    711   1.88  knakahar crypto_select_driver_lock(struct cryptoini *cri, int hard)
    712   1.88  knakahar {
    713   1.88  knakahar 	u_int32_t hid;
    714   1.89  knakahar 	int accept;
    715   1.89  knakahar 	struct cryptocap *cap, *best;
    716  1.107  christos 	int error = 0;
    717    1.1  jonathan 
    718   1.89  knakahar 	best = NULL;
    719   1.89  knakahar 	/*
    720   1.89  knakahar 	 * hard == 0 can use both hardware and software drivers.
    721   1.89  knakahar 	 * We use hardware drivers prior to software drivers, so search
    722   1.89  knakahar 	 * hardware drivers at first time.
    723   1.89  knakahar 	 */
    724   1.89  knakahar 	if (hard >= 0)
    725   1.89  knakahar 		accept = CRYPTO_ACCEPT_HARDWARE;
    726   1.89  knakahar 	else
    727   1.89  knakahar 		accept = CRYPTO_ACCEPT_SOFTWARE;
    728   1.89  knakahar again:
    729    1.1  jonathan 	for (hid = 0; hid < crypto_drivers_num; hid++) {
    730   1.89  knakahar 		cap = crypto_checkdriver(hid);
    731   1.77  knakahar 		if (cap == NULL)
    732   1.77  knakahar 			continue;
    733   1.77  knakahar 
    734   1.81  knakahar 		crypto_driver_lock(cap);
    735   1.81  knakahar 
    736    1.1  jonathan 		/*
    737    1.1  jonathan 		 * If it's not initialized or has remaining sessions
    738    1.1  jonathan 		 * referencing it, skip.
    739    1.1  jonathan 		 */
    740   1.77  knakahar 		if (cap->cc_newsession == NULL ||
    741   1.81  knakahar 		    (cap->cc_flags & CRYPTOCAP_F_CLEANUP)) {
    742   1.81  knakahar 			crypto_driver_unlock(cap);
    743    1.1  jonathan 			continue;
    744   1.81  knakahar 		}
    745    1.1  jonathan 
    746    1.1  jonathan 		/* Hardware required -- ignore software drivers. */
    747   1.89  knakahar 		if ((accept & CRYPTO_ACCEPT_SOFTWARE) == 0
    748   1.89  knakahar 		    && (cap->cc_flags & CRYPTOCAP_F_SOFTWARE)) {
    749   1.81  knakahar 			crypto_driver_unlock(cap);
    750    1.1  jonathan 			continue;
    751   1.81  knakahar 		}
    752    1.1  jonathan 		/* Software required -- ignore hardware drivers. */
    753   1.89  knakahar 		if ((accept & CRYPTO_ACCEPT_HARDWARE) == 0
    754   1.89  knakahar 		    && (cap->cc_flags & CRYPTOCAP_F_SOFTWARE) == 0) {
    755   1.81  knakahar 			crypto_driver_unlock(cap);
    756    1.1  jonathan 			continue;
    757   1.81  knakahar 		}
    758    1.1  jonathan 
    759    1.1  jonathan 		/* See if all the algorithms are supported. */
    760   1.88  knakahar 		if (crypto_driver_suitable(cap, cri)) {
    761   1.89  knakahar 			if (best == NULL) {
    762   1.89  knakahar 				/* keep holding crypto_driver_lock(cap) */
    763   1.89  knakahar 				best = cap;
    764   1.89  knakahar 				continue;
    765   1.89  knakahar 			} else if (cap->cc_sessions < best->cc_sessions) {
    766   1.89  knakahar 				crypto_driver_unlock(best);
    767   1.89  knakahar 				/* keep holding crypto_driver_lock(cap) */
    768   1.89  knakahar 				best = cap;
    769   1.89  knakahar 				continue;
    770   1.89  knakahar 			}
    771   1.88  knakahar 		}
    772   1.88  knakahar 
    773   1.88  knakahar 		crypto_driver_unlock(cap);
    774   1.88  knakahar 	}
    775   1.89  knakahar 	if (best == NULL && hard == 0
    776   1.89  knakahar 	    && (accept & CRYPTO_ACCEPT_SOFTWARE) == 0) {
    777   1.89  knakahar 		accept = CRYPTO_ACCEPT_SOFTWARE;
    778   1.89  knakahar 		goto again;
    779   1.89  knakahar 	}
    780   1.88  knakahar 
    781  1.107  christos 	if (best == NULL && hard == 0 && error == 0) {
    782  1.108  christos 		mutex_exit(&crypto_drv_mtx);
    783  1.107  christos 		error = module_autoload("swcrypto", MODULE_CLASS_DRIVER);
    784  1.108  christos 		mutex_enter(&crypto_drv_mtx);
    785  1.107  christos 		if (error == 0) {
    786  1.107  christos 			error = EINVAL;
    787  1.107  christos 			goto again;
    788  1.107  christos 		}
    789  1.107  christos 	}
    790  1.107  christos 
    791   1.89  knakahar 	return best;
    792   1.88  knakahar }
    793   1.88  knakahar 
    794   1.88  knakahar /*
    795   1.88  knakahar  * Create a new session.
    796   1.88  knakahar  */
    797   1.88  knakahar int
    798   1.88  knakahar crypto_newsession(u_int64_t *sid, struct cryptoini *cri, int hard)
    799   1.88  knakahar {
    800   1.88  knakahar 	struct cryptocap *cap;
    801   1.88  knakahar 	int err = EINVAL;
    802   1.88  knakahar 
    803  1.120  riastrad 	/*
    804  1.120  riastrad 	 * On failure, leave *sid initialized to a sentinel value that
    805  1.120  riastrad 	 * crypto_freesession will ignore.  This is the same as what
    806  1.120  riastrad 	 * you get from zero-initialized memory -- some callers (I'm
    807  1.120  riastrad 	 * looking at you, netipsec!) have paths that lead from
    808  1.120  riastrad 	 * zero-initialized memory into crypto_freesession without any
    809  1.120  riastrad 	 * crypto_newsession.
    810  1.120  riastrad 	 */
    811  1.120  riastrad 	*sid = 0;
    812  1.120  riastrad 
    813   1.88  knakahar 	mutex_enter(&crypto_drv_mtx);
    814    1.1  jonathan 
    815   1.88  knakahar 	cap = crypto_select_driver_lock(cri, hard);
    816   1.88  knakahar 	if (cap != NULL) {
    817   1.88  knakahar 		u_int32_t hid, lid;
    818    1.1  jonathan 
    819   1.88  knakahar 		hid = cap - crypto_drivers;
    820  1.120  riastrad 		KASSERT(hid < 0xffffff);
    821   1.88  knakahar 		/*
    822   1.88  knakahar 		 * Can't do everything in one session.
    823   1.88  knakahar 		 *
    824   1.88  knakahar 		 * XXX Fix this. We need to inject a "virtual" session layer right
    825   1.88  knakahar 		 * XXX about here.
    826   1.88  knakahar 		 */
    827    1.1  jonathan 
    828   1.88  knakahar 		/* Call the driver initialization routine. */
    829   1.88  knakahar 		lid = hid;		/* Pass the driver ID. */
    830   1.88  knakahar 		crypto_driver_unlock(cap);
    831   1.88  knakahar 		err = cap->cc_newsession(cap->cc_arg, &lid, cri);
    832   1.88  knakahar 		crypto_driver_lock(cap);
    833   1.88  knakahar 		if (err == 0) {
    834  1.120  riastrad 			(*sid) = hid + 1;
    835   1.88  knakahar 			(*sid) <<= 32;
    836   1.88  knakahar 			(*sid) |= (lid & 0xffffffff);
    837  1.120  riastrad 			KASSERT(*sid != 0);
    838  1.120  riastrad 			cap->cc_sessions++;
    839   1.88  knakahar 		} else {
    840   1.88  knakahar 			DPRINTF("crypto_drivers[%d].cc_newsession() failed. error=%d\n",
    841   1.88  knakahar 			    hid, err);
    842    1.1  jonathan 		}
    843   1.81  knakahar 		crypto_driver_unlock(cap);
    844    1.1  jonathan 	}
    845   1.88  knakahar 
    846   1.57  knakahar 	mutex_exit(&crypto_drv_mtx);
    847   1.88  knakahar 
    848    1.1  jonathan 	return err;
    849    1.1  jonathan }
    850    1.1  jonathan 
    851    1.1  jonathan /*
    852    1.1  jonathan  * Delete an existing session (or a reserved session on an unregistered
    853   1.57  knakahar  * driver).
    854    1.1  jonathan  */
    855  1.125  riastrad void
    856    1.1  jonathan crypto_freesession(u_int64_t sid)
    857    1.1  jonathan {
    858   1.77  knakahar 	struct cryptocap *cap;
    859    1.1  jonathan 
    860  1.120  riastrad 	/*
    861  1.120  riastrad 	 * crypto_newsession never returns 0 as a sid (by virtue of
    862  1.120  riastrad 	 * never returning 0 as a hid, which is part of the sid).
    863  1.120  riastrad 	 * However, some callers assume that freeing zero is safe.
    864  1.120  riastrad 	 * Previously this relied on all drivers to agree that freeing
    865  1.120  riastrad 	 * invalid sids is a no-op, but that's a terrible API contract
    866  1.120  riastrad 	 * that we're getting rid of.
    867  1.120  riastrad 	 */
    868  1.120  riastrad 	if (sid == 0)
    869  1.120  riastrad 		return;
    870  1.120  riastrad 
    871    1.1  jonathan 	/* Determine two IDs. */
    872   1.81  knakahar 	cap = crypto_checkdriver_lock(CRYPTO_SESID2HID(sid));
    873  1.125  riastrad 	if (cap == NULL)	/* XXX should assert; need to audit callers */
    874  1.125  riastrad 		return;
    875    1.1  jonathan 
    876   1.77  knakahar 	if (cap->cc_sessions)
    877   1.77  knakahar 		(cap->cc_sessions)--;
    878    1.1  jonathan 
    879    1.1  jonathan 	/* Call the driver cleanup routine, if available. */
    880   1.77  knakahar 	if (cap->cc_freesession)
    881  1.124  riastrad 		cap->cc_freesession(cap->cc_arg, sid);
    882    1.1  jonathan 
    883    1.1  jonathan 	/*
    884    1.1  jonathan 	 * If this was the last session of a driver marked as invalid,
    885    1.1  jonathan 	 * make the entry available for reuse.
    886    1.1  jonathan 	 */
    887   1.77  knakahar 	if ((cap->cc_flags & CRYPTOCAP_F_CLEANUP) && cap->cc_sessions == 0)
    888   1.81  knakahar 		crypto_driver_clear(cap);
    889    1.1  jonathan 
    890   1.81  knakahar 	crypto_driver_unlock(cap);
    891    1.1  jonathan }
    892    1.1  jonathan 
    893   1.86  christos static bool
    894   1.86  christos crypto_checkdriver_initialized(const struct cryptocap *cap)
    895   1.86  christos {
    896   1.86  christos 
    897   1.86  christos 	return cap->cc_process != NULL ||
    898   1.86  christos 	    (cap->cc_flags & CRYPTOCAP_F_CLEANUP) != 0 ||
    899   1.86  christos 	    cap->cc_sessions != 0;
    900   1.86  christos }
    901   1.86  christos 
    902    1.1  jonathan /*
    903    1.1  jonathan  * Return an unused driver id.  Used by drivers prior to registering
    904    1.1  jonathan  * support for the algorithms they handle.
    905    1.1  jonathan  */
    906    1.1  jonathan int32_t
    907    1.1  jonathan crypto_get_driverid(u_int32_t flags)
    908    1.1  jonathan {
    909    1.1  jonathan 	struct cryptocap *newdrv;
    910   1.77  knakahar 	struct cryptocap *cap = NULL;
    911   1.23       tls 	int i;
    912    1.1  jonathan 
    913   1.46  pgoyette 	(void)crypto_init();		/* XXX oh, this is foul! */
    914   1.11   thorpej 
    915   1.57  knakahar 	mutex_enter(&crypto_drv_mtx);
    916   1.77  knakahar 	for (i = 0; i < crypto_drivers_num; i++) {
    917   1.79  knakahar 		cap = crypto_checkdriver_uninit(i);
    918   1.86  christos 		if (cap == NULL || crypto_checkdriver_initialized(cap))
    919   1.77  knakahar 			continue;
    920   1.86  christos 		break;
    921   1.77  knakahar 	}
    922    1.1  jonathan 
    923    1.1  jonathan 	/* Out of entries, allocate some more. */
    924   1.77  knakahar 	if (cap == NULL) {
    925    1.1  jonathan 		/* Be careful about wrap-around. */
    926    1.1  jonathan 		if (2 * crypto_drivers_num <= crypto_drivers_num) {
    927   1.57  knakahar 			mutex_exit(&crypto_drv_mtx);
    928    1.1  jonathan 			printf("crypto: driver count wraparound!\n");
    929    1.1  jonathan 			return -1;
    930    1.1  jonathan 		}
    931    1.1  jonathan 
    932   1.99  knakahar 		newdrv = kmem_zalloc(2 * crypto_drivers_num *
    933  1.109       chs 		    sizeof(struct cryptocap), KM_SLEEP);
    934   1.34   tsutsui 		memcpy(newdrv, crypto_drivers,
    935    1.1  jonathan 		    crypto_drivers_num * sizeof(struct cryptocap));
    936   1.99  knakahar 		kmem_free(crypto_drivers,
    937   1.99  knakahar 		    crypto_drivers_num * sizeof(struct cryptocap));
    938    1.1  jonathan 
    939    1.1  jonathan 		crypto_drivers_num *= 2;
    940    1.1  jonathan 		crypto_drivers = newdrv;
    941   1.77  knakahar 
    942   1.79  knakahar 		cap = crypto_checkdriver_uninit(i);
    943   1.77  knakahar 		KASSERT(cap != NULL);
    944    1.1  jonathan 	}
    945    1.1  jonathan 
    946    1.1  jonathan 	/* NB: state is zero'd on free */
    947   1.77  knakahar 	cap->cc_sessions = 1;	/* Mark */
    948   1.77  knakahar 	cap->cc_flags = flags;
    949   1.81  knakahar 	mutex_init(&cap->cc_lock, MUTEX_DEFAULT, IPL_NET);
    950    1.1  jonathan 
    951    1.1  jonathan 	if (bootverbose)
    952    1.1  jonathan 		printf("crypto: assign driver %u, flags %u\n", i, flags);
    953    1.1  jonathan 
    954   1.57  knakahar 	mutex_exit(&crypto_drv_mtx);
    955    1.1  jonathan 
    956    1.1  jonathan 	return i;
    957    1.1  jonathan }
    958    1.1  jonathan 
    959    1.1  jonathan static struct cryptocap *
    960   1.81  knakahar crypto_checkdriver_lock(u_int32_t hid)
    961    1.1  jonathan {
    962   1.81  knakahar 	struct cryptocap *cap;
    963   1.79  knakahar 
    964   1.79  knakahar 	KASSERT(crypto_drivers != NULL);
    965   1.79  knakahar 
    966   1.81  knakahar 	if (hid >= crypto_drivers_num)
    967   1.81  knakahar 		return NULL;
    968   1.81  knakahar 
    969   1.81  knakahar 	cap = &crypto_drivers[hid];
    970   1.81  knakahar 	mutex_enter(&cap->cc_lock);
    971   1.81  knakahar 	return cap;
    972   1.79  knakahar }
    973   1.79  knakahar 
    974   1.79  knakahar /*
    975   1.79  knakahar  * Use crypto_checkdriver_uninit() instead of crypto_checkdriver() below two
    976   1.79  knakahar  * situations
    977   1.79  knakahar  *     - crypto_drivers[] may not be allocated
    978   1.79  knakahar  *     - crypto_drivers[hid] may not be initialized
    979   1.79  knakahar  */
    980   1.79  knakahar static struct cryptocap *
    981   1.79  knakahar crypto_checkdriver_uninit(u_int32_t hid)
    982   1.79  knakahar {
    983   1.79  knakahar 
    984   1.81  knakahar 	KASSERT(mutex_owned(&crypto_drv_mtx));
    985   1.81  knakahar 
    986    1.1  jonathan 	if (crypto_drivers == NULL)
    987    1.1  jonathan 		return NULL;
    988   1.79  knakahar 
    989    1.1  jonathan 	return (hid >= crypto_drivers_num ? NULL : &crypto_drivers[hid]);
    990    1.1  jonathan }
    991    1.1  jonathan 
    992   1.86  christos /*
    993   1.86  christos  * Use crypto_checkdriver_uninit() instead of crypto_checkdriver() below two
    994   1.86  christos  * situations
    995   1.86  christos  *     - crypto_drivers[] may not be allocated
    996   1.86  christos  *     - crypto_drivers[hid] may not be initialized
    997   1.86  christos  */
    998   1.86  christos static struct cryptocap *
    999   1.86  christos crypto_checkdriver(u_int32_t hid)
   1000   1.86  christos {
   1001   1.86  christos 
   1002   1.86  christos 	KASSERT(mutex_owned(&crypto_drv_mtx));
   1003   1.86  christos 
   1004   1.86  christos 	if (crypto_drivers == NULL || hid >= crypto_drivers_num)
   1005   1.86  christos 		return NULL;
   1006   1.86  christos 
   1007   1.86  christos 	struct cryptocap *cap = &crypto_drivers[hid];
   1008   1.86  christos 	return crypto_checkdriver_initialized(cap) ? cap : NULL;
   1009   1.86  christos }
   1010   1.86  christos 
   1011   1.81  knakahar static inline void
   1012   1.81  knakahar crypto_driver_lock(struct cryptocap *cap)
   1013   1.81  knakahar {
   1014   1.81  knakahar 
   1015   1.81  knakahar 	KASSERT(cap != NULL);
   1016   1.81  knakahar 
   1017   1.81  knakahar 	mutex_enter(&cap->cc_lock);
   1018   1.81  knakahar }
   1019   1.81  knakahar 
   1020   1.81  knakahar static inline void
   1021   1.81  knakahar crypto_driver_unlock(struct cryptocap *cap)
   1022   1.81  knakahar {
   1023   1.81  knakahar 
   1024   1.81  knakahar 	KASSERT(cap != NULL);
   1025   1.81  knakahar 
   1026   1.81  knakahar 	mutex_exit(&cap->cc_lock);
   1027   1.81  knakahar }
   1028   1.81  knakahar 
   1029   1.81  knakahar static void
   1030   1.81  knakahar crypto_driver_clear(struct cryptocap *cap)
   1031   1.81  knakahar {
   1032   1.81  knakahar 
   1033   1.81  knakahar 	if (cap == NULL)
   1034   1.81  knakahar 		return;
   1035   1.81  knakahar 
   1036   1.81  knakahar 	KASSERT(mutex_owned(&cap->cc_lock));
   1037   1.81  knakahar 
   1038   1.81  knakahar 	cap->cc_sessions = 0;
   1039   1.81  knakahar 	memset(&cap->cc_max_op_len, 0, sizeof(cap->cc_max_op_len));
   1040   1.81  knakahar 	memset(&cap->cc_alg, 0, sizeof(cap->cc_alg));
   1041   1.81  knakahar 	memset(&cap->cc_kalg, 0, sizeof(cap->cc_kalg));
   1042   1.81  knakahar 	cap->cc_flags = 0;
   1043   1.81  knakahar 	cap->cc_qblocked = 0;
   1044   1.81  knakahar 	cap->cc_kqblocked = 0;
   1045   1.81  knakahar 
   1046   1.81  knakahar 	cap->cc_arg = NULL;
   1047   1.81  knakahar 	cap->cc_newsession = NULL;
   1048   1.81  knakahar 	cap->cc_process = NULL;
   1049   1.81  knakahar 	cap->cc_freesession = NULL;
   1050   1.81  knakahar 	cap->cc_kprocess = NULL;
   1051   1.81  knakahar }
   1052   1.81  knakahar 
   1053    1.1  jonathan /*
   1054    1.1  jonathan  * Register support for a key-related algorithm.  This routine
   1055    1.1  jonathan  * is called once for each algorithm supported a driver.
   1056    1.1  jonathan  */
   1057    1.1  jonathan int
   1058    1.1  jonathan crypto_kregister(u_int32_t driverid, int kalg, u_int32_t flags,
   1059   1.37  christos     int (*kprocess)(void *, struct cryptkop *, int),
   1060    1.1  jonathan     void *karg)
   1061    1.1  jonathan {
   1062    1.1  jonathan 	struct cryptocap *cap;
   1063    1.1  jonathan 	int err;
   1064    1.1  jonathan 
   1065   1.57  knakahar 	mutex_enter(&crypto_drv_mtx);
   1066    1.1  jonathan 
   1067   1.81  knakahar 	cap = crypto_checkdriver_lock(driverid);
   1068    1.1  jonathan 	if (cap != NULL &&
   1069  1.116    andvar 	    (CRK_ALGORITHM_MIN <= kalg && kalg <= CRK_ALGORITHM_MAX)) {
   1070    1.1  jonathan 		/*
   1071    1.1  jonathan 		 * XXX Do some performance testing to determine placing.
   1072    1.1  jonathan 		 * XXX We probably need an auxiliary data structure that
   1073    1.1  jonathan 		 * XXX describes relative performances.
   1074    1.1  jonathan 		 */
   1075    1.1  jonathan 
   1076    1.1  jonathan 		cap->cc_kalg[kalg] = flags | CRYPTO_ALG_FLAG_SUPPORTED;
   1077   1.23       tls 		if (bootverbose) {
   1078   1.23       tls 			printf("crypto: driver %u registers key alg %u "
   1079   1.23       tls 			       " flags %u\n",
   1080   1.23       tls 				driverid,
   1081   1.23       tls 				kalg,
   1082   1.23       tls 				flags
   1083    1.1  jonathan 			);
   1084   1.23       tls 		}
   1085    1.1  jonathan 
   1086    1.1  jonathan 		if (cap->cc_kprocess == NULL) {
   1087    1.1  jonathan 			cap->cc_karg = karg;
   1088    1.1  jonathan 			cap->cc_kprocess = kprocess;
   1089    1.1  jonathan 		}
   1090    1.1  jonathan 		err = 0;
   1091    1.1  jonathan 	} else
   1092    1.1  jonathan 		err = EINVAL;
   1093    1.1  jonathan 
   1094   1.57  knakahar 	mutex_exit(&crypto_drv_mtx);
   1095    1.1  jonathan 	return err;
   1096    1.1  jonathan }
   1097    1.1  jonathan 
   1098    1.1  jonathan /*
   1099    1.1  jonathan  * Register support for a non-key-related algorithm.  This routine
   1100    1.1  jonathan  * is called once for each such algorithm supported by a driver.
   1101    1.1  jonathan  */
   1102    1.1  jonathan int
   1103    1.1  jonathan crypto_register(u_int32_t driverid, int alg, u_int16_t maxoplen,
   1104    1.1  jonathan     u_int32_t flags,
   1105   1.37  christos     int (*newses)(void *, u_int32_t*, struct cryptoini*),
   1106  1.124  riastrad     void (*freeses)(void *, u_int64_t),
   1107   1.37  christos     int (*process)(void *, struct cryptop *, int),
   1108    1.1  jonathan     void *arg)
   1109    1.1  jonathan {
   1110    1.1  jonathan 	struct cryptocap *cap;
   1111   1.23       tls 	int err;
   1112    1.1  jonathan 
   1113   1.81  knakahar 	cap = crypto_checkdriver_lock(driverid);
   1114   1.81  knakahar 	if (cap == NULL)
   1115   1.81  knakahar 		return EINVAL;
   1116    1.1  jonathan 
   1117    1.1  jonathan 	/* NB: algorithms are in the range [1..max] */
   1118   1.81  knakahar 	if (CRYPTO_ALGORITHM_MIN <= alg && alg <= CRYPTO_ALGORITHM_MAX) {
   1119    1.1  jonathan 		/*
   1120    1.1  jonathan 		 * XXX Do some performance testing to determine placing.
   1121    1.1  jonathan 		 * XXX We probably need an auxiliary data structure that
   1122    1.1  jonathan 		 * XXX describes relative performances.
   1123    1.1  jonathan 		 */
   1124    1.1  jonathan 
   1125    1.1  jonathan 		cap->cc_alg[alg] = flags | CRYPTO_ALG_FLAG_SUPPORTED;
   1126    1.1  jonathan 		cap->cc_max_op_len[alg] = maxoplen;
   1127   1.23       tls 		if (bootverbose) {
   1128   1.23       tls 			printf("crypto: driver %u registers alg %u "
   1129   1.23       tls 				"flags %u maxoplen %u\n",
   1130   1.23       tls 				driverid,
   1131   1.23       tls 				alg,
   1132   1.23       tls 				flags,
   1133   1.23       tls 				maxoplen
   1134    1.1  jonathan 			);
   1135   1.23       tls 		}
   1136    1.1  jonathan 
   1137    1.1  jonathan 		if (cap->cc_process == NULL) {
   1138    1.1  jonathan 			cap->cc_arg = arg;
   1139    1.1  jonathan 			cap->cc_newsession = newses;
   1140    1.1  jonathan 			cap->cc_process = process;
   1141    1.1  jonathan 			cap->cc_freesession = freeses;
   1142    1.1  jonathan 			cap->cc_sessions = 0;		/* Unmark */
   1143    1.1  jonathan 		}
   1144    1.1  jonathan 		err = 0;
   1145    1.1  jonathan 	} else
   1146    1.1  jonathan 		err = EINVAL;
   1147    1.1  jonathan 
   1148   1.81  knakahar 	crypto_driver_unlock(cap);
   1149   1.81  knakahar 
   1150    1.1  jonathan 	return err;
   1151    1.1  jonathan }
   1152    1.1  jonathan 
   1153   1.61  knakahar static int
   1154   1.81  knakahar crypto_unregister_locked(struct cryptocap *cap, int alg, bool all)
   1155   1.61  knakahar {
   1156   1.61  knakahar 	int i;
   1157   1.61  knakahar 	u_int32_t ses;
   1158   1.61  knakahar 	bool lastalg = true;
   1159   1.61  knakahar 
   1160   1.81  knakahar 	KASSERT(cap != NULL);
   1161   1.81  knakahar 	KASSERT(mutex_owned(&cap->cc_lock));
   1162   1.61  knakahar 
   1163   1.78  knakahar 	if (alg < CRYPTO_ALGORITHM_MIN || CRYPTO_ALGORITHM_MAX < alg)
   1164   1.61  knakahar 		return EINVAL;
   1165   1.61  knakahar 
   1166   1.81  knakahar 	if (!all && cap->cc_alg[alg] == 0)
   1167   1.61  knakahar 		return EINVAL;
   1168   1.61  knakahar 
   1169   1.61  knakahar 	cap->cc_alg[alg] = 0;
   1170   1.61  knakahar 	cap->cc_max_op_len[alg] = 0;
   1171   1.61  knakahar 
   1172   1.62  knakahar 	if (all) {
   1173   1.62  knakahar 		if (alg != CRYPTO_ALGORITHM_MAX)
   1174   1.61  knakahar 			lastalg = false;
   1175   1.62  knakahar 	} else {
   1176   1.62  knakahar 		/* Was this the last algorithm ? */
   1177   1.62  knakahar 		for (i = CRYPTO_ALGORITHM_MIN; i <= CRYPTO_ALGORITHM_MAX; i++)
   1178   1.62  knakahar 			if (cap->cc_alg[i] != 0) {
   1179   1.62  knakahar 				lastalg = false;
   1180   1.62  knakahar 				break;
   1181   1.62  knakahar 			}
   1182   1.62  knakahar 	}
   1183   1.61  knakahar 	if (lastalg) {
   1184   1.61  knakahar 		ses = cap->cc_sessions;
   1185   1.81  knakahar 		crypto_driver_clear(cap);
   1186   1.61  knakahar 		if (ses != 0) {
   1187   1.61  knakahar 			/*
   1188   1.61  knakahar 			 * If there are pending sessions, just mark as invalid.
   1189   1.61  knakahar 			 */
   1190   1.61  knakahar 			cap->cc_flags |= CRYPTOCAP_F_CLEANUP;
   1191   1.61  knakahar 			cap->cc_sessions = ses;
   1192   1.61  knakahar 		}
   1193   1.61  knakahar 	}
   1194   1.61  knakahar 
   1195   1.61  knakahar 	return 0;
   1196   1.61  knakahar }
   1197   1.61  knakahar 
   1198    1.1  jonathan /*
   1199    1.1  jonathan  * Unregister a crypto driver. If there are pending sessions using it,
   1200    1.1  jonathan  * leave enough information around so that subsequent calls using those
   1201    1.1  jonathan  * sessions will correctly detect the driver has been unregistered and
   1202    1.1  jonathan  * reroute requests.
   1203    1.1  jonathan  */
   1204    1.1  jonathan int
   1205    1.1  jonathan crypto_unregister(u_int32_t driverid, int alg)
   1206    1.1  jonathan {
   1207   1.61  knakahar 	int err;
   1208   1.81  knakahar 	struct cryptocap *cap;
   1209    1.1  jonathan 
   1210   1.81  knakahar 	cap = crypto_checkdriver_lock(driverid);
   1211   1.81  knakahar 	err = crypto_unregister_locked(cap, alg, false);
   1212   1.81  knakahar 	crypto_driver_unlock(cap);
   1213    1.1  jonathan 
   1214    1.1  jonathan 	return err;
   1215    1.1  jonathan }
   1216    1.1  jonathan 
   1217    1.1  jonathan /*
   1218    1.1  jonathan  * Unregister all algorithms associated with a crypto driver.
   1219    1.1  jonathan  * If there are pending sessions using it, leave enough information
   1220    1.1  jonathan  * around so that subsequent calls using those sessions will
   1221    1.1  jonathan  * correctly detect the driver has been unregistered and reroute
   1222    1.1  jonathan  * requests.
   1223    1.1  jonathan  */
   1224    1.1  jonathan int
   1225    1.1  jonathan crypto_unregister_all(u_int32_t driverid)
   1226    1.1  jonathan {
   1227   1.62  knakahar 	int err, i;
   1228   1.81  knakahar 	struct cryptocap *cap;
   1229    1.1  jonathan 
   1230   1.81  knakahar 	cap = crypto_checkdriver_lock(driverid);
   1231   1.62  knakahar 	for (i = CRYPTO_ALGORITHM_MIN; i <= CRYPTO_ALGORITHM_MAX; i++) {
   1232   1.81  knakahar 		err = crypto_unregister_locked(cap, i, true);
   1233   1.62  knakahar 		if (err)
   1234   1.62  knakahar 			break;
   1235   1.62  knakahar 	}
   1236   1.81  knakahar 	crypto_driver_unlock(cap);
   1237    1.1  jonathan 
   1238    1.1  jonathan 	return err;
   1239    1.1  jonathan }
   1240    1.1  jonathan 
   1241    1.1  jonathan /*
   1242    1.1  jonathan  * Clear blockage on a driver.  The what parameter indicates whether
   1243    1.1  jonathan  * the driver is now ready for cryptop's and/or cryptokop's.
   1244    1.1  jonathan  */
   1245    1.1  jonathan int
   1246    1.1  jonathan crypto_unblock(u_int32_t driverid, int what)
   1247    1.1  jonathan {
   1248    1.1  jonathan 	struct cryptocap *cap;
   1249   1.55  knakahar 	int needwakeup = 0;
   1250    1.1  jonathan 
   1251   1.81  knakahar 	cap = crypto_checkdriver_lock(driverid);
   1252   1.81  knakahar 	if (cap == NULL)
   1253   1.55  knakahar 		return EINVAL;
   1254   1.55  knakahar 
   1255   1.55  knakahar 	if (what & CRYPTO_SYMQ) {
   1256   1.55  knakahar 		needwakeup |= cap->cc_qblocked;
   1257   1.55  knakahar 		cap->cc_qblocked = 0;
   1258   1.55  knakahar 	}
   1259   1.55  knakahar 	if (what & CRYPTO_ASYMQ) {
   1260   1.55  knakahar 		needwakeup |= cap->cc_kqblocked;
   1261   1.55  knakahar 		cap->cc_kqblocked = 0;
   1262   1.24       tls 	}
   1263   1.81  knakahar 	crypto_driver_unlock(cap);
   1264   1.97  knakahar 	if (needwakeup) {
   1265   1.97  knakahar 		kpreempt_disable();
   1266   1.97  knakahar 		softint_schedule(crypto_q_si);
   1267   1.97  knakahar 		kpreempt_enable();
   1268   1.97  knakahar 	}
   1269    1.1  jonathan 
   1270   1.55  knakahar 	return 0;
   1271    1.1  jonathan }
   1272    1.1  jonathan 
   1273    1.1  jonathan /*
   1274    1.1  jonathan  * Dispatch a crypto request to a driver or queue
   1275    1.1  jonathan  * it, to be processed by the kernel thread.
   1276    1.1  jonathan  */
   1277    1.1  jonathan int
   1278    1.1  jonathan crypto_dispatch(struct cryptop *crp)
   1279    1.1  jonathan {
   1280   1.95  knakahar 	int result, s;
   1281   1.65  knakahar 	struct cryptocap *cap;
   1282   1.95  knakahar 	struct crypto_crp_qs *crp_qs;
   1283   1.95  knakahar 	struct crypto_crp_q *crp_q;
   1284    1.1  jonathan 
   1285   1.59  knakahar 	KASSERT(crp != NULL);
   1286  1.126  riastrad 	KASSERT(crp->crp_callback != NULL);
   1287  1.123  riastrad 	KASSERT(crp->crp_desc != NULL);
   1288  1.123  riastrad 	KASSERT(crp->crp_buf != NULL);
   1289  1.119  riastrad 	KASSERT(!cpu_intr_p());
   1290   1.59  knakahar 
   1291   1.64  knakahar 	DPRINTF("crp %p, alg %d\n", crp, crp->crp_desc->crd_alg);
   1292    1.1  jonathan 
   1293    1.1  jonathan 	cryptostats.cs_ops++;
   1294    1.1  jonathan 
   1295    1.1  jonathan #ifdef CRYPTO_TIMING
   1296    1.1  jonathan 	if (crypto_timing)
   1297    1.1  jonathan 		nanouptime(&crp->crp_tstamp);
   1298    1.1  jonathan #endif
   1299   1.58  knakahar 
   1300   1.65  knakahar 	if ((crp->crp_flags & CRYPTO_F_BATCH) != 0) {
   1301   1.80  knakahar 		int wasempty;
   1302    1.1  jonathan 		/*
   1303    1.1  jonathan 		 * Caller marked the request as ``ok to delay'';
   1304    1.1  jonathan 		 * queue it for the swi thread.  This is desirable
   1305    1.1  jonathan 		 * when the operation is low priority and/or suitable
   1306    1.1  jonathan 		 * for batching.
   1307   1.83  knakahar 		 *
   1308   1.83  knakahar 		 * don't care list order in batch job.
   1309    1.1  jonathan 		 */
   1310   1.95  knakahar 		crp_qs = crypto_get_crp_qs(&s);
   1311  1.101  knakahar 		crp_q = crp_qs->crp_q;
   1312   1.95  knakahar 		wasempty  = TAILQ_EMPTY(crp_q);
   1313   1.95  knakahar 		TAILQ_INSERT_TAIL(crp_q, crp, crp_next);
   1314   1.95  knakahar 		crypto_put_crp_qs(&s);
   1315   1.95  knakahar 		crp_q = NULL;
   1316   1.97  knakahar 		if (wasempty) {
   1317   1.97  knakahar 			kpreempt_disable();
   1318   1.97  knakahar 			softint_schedule(crypto_q_si);
   1319   1.97  knakahar 			kpreempt_enable();
   1320   1.97  knakahar 		}
   1321   1.65  knakahar 
   1322   1.65  knakahar 		return 0;
   1323   1.65  knakahar 	}
   1324   1.65  knakahar 
   1325   1.95  knakahar 	crp_qs = crypto_get_crp_qs(&s);
   1326  1.101  knakahar 	crp_q = crp_qs->crp_q;
   1327   1.81  knakahar 	cap = crypto_checkdriver_lock(CRYPTO_SESID2HID(crp->crp_sid));
   1328   1.66  knakahar 	/*
   1329   1.66  knakahar 	 * TODO:
   1330   1.66  knakahar 	 * If we can ensure the driver has been valid until the driver is
   1331   1.66  knakahar 	 * done crypto_unregister(), this migrate operation is not required.
   1332   1.66  knakahar 	 */
   1333   1.66  knakahar 	if (cap == NULL) {
   1334   1.66  knakahar 		/*
   1335   1.66  knakahar 		 * The driver must be detached, so this request will migrate
   1336   1.66  knakahar 		 * to other drivers in cryptointr() later.
   1337   1.66  knakahar 		 */
   1338   1.95  knakahar 		TAILQ_INSERT_TAIL(crp_q, crp, crp_next);
   1339   1.91  knakahar 		result = 0;
   1340   1.91  knakahar 		goto out;
   1341   1.66  knakahar 	}
   1342   1.66  knakahar 
   1343   1.67  knakahar 	if (cap->cc_qblocked != 0) {
   1344   1.81  knakahar 		crypto_driver_unlock(cap);
   1345   1.67  knakahar 		/*
   1346   1.67  knakahar 		 * The driver is blocked, just queue the op until
   1347   1.67  knakahar 		 * it unblocks and the swi thread gets kicked.
   1348   1.67  knakahar 		 */
   1349   1.95  knakahar 		TAILQ_INSERT_TAIL(crp_q, crp, crp_next);
   1350   1.91  knakahar 		result = 0;
   1351   1.91  knakahar 		goto out;
   1352   1.67  knakahar 	}
   1353   1.67  knakahar 
   1354   1.67  knakahar 	/*
   1355   1.65  knakahar 	 * Caller marked the request to be processed
   1356   1.65  knakahar 	 * immediately; dispatch it directly to the
   1357   1.65  knakahar 	 * driver unless the driver is currently blocked.
   1358   1.65  knakahar 	 */
   1359   1.81  knakahar 	crypto_driver_unlock(cap);
   1360   1.67  knakahar 	result = crypto_invoke(crp, 0);
   1361   1.67  knakahar 	if (result == ERESTART) {
   1362   1.67  knakahar 		/*
   1363   1.67  knakahar 		 * The driver ran out of resources, mark the
   1364   1.67  knakahar 		 * driver ``blocked'' for cryptop's and put
   1365   1.67  knakahar 		 * the op on the queue.
   1366   1.67  knakahar 		 */
   1367   1.81  knakahar 		crypto_driver_lock(cap);
   1368   1.81  knakahar 		cap->cc_qblocked = 1;
   1369   1.81  knakahar 		crypto_driver_unlock(cap);
   1370   1.95  knakahar 		TAILQ_INSERT_HEAD(crp_q, crp, crp_next);
   1371   1.67  knakahar 		cryptostats.cs_blocks++;
   1372   1.65  knakahar 
   1373   1.65  knakahar 		/*
   1374   1.67  knakahar 		 * The crp is enqueued to crp_q, that is,
   1375   1.67  knakahar 		 * no error occurs. So, this function should
   1376   1.67  knakahar 		 * not return error.
   1377   1.65  knakahar 		 */
   1378    1.1  jonathan 		result = 0;
   1379    1.1  jonathan 	}
   1380    1.1  jonathan 
   1381   1.91  knakahar out:
   1382   1.95  knakahar 	crypto_put_crp_qs(&s);
   1383    1.1  jonathan 	return result;
   1384    1.1  jonathan }
   1385    1.1  jonathan 
   1386    1.1  jonathan /*
   1387  1.115    andvar  * Add an asymmetric crypto request to a queue,
   1388    1.1  jonathan  * to be processed by the kernel thread.
   1389    1.1  jonathan  */
   1390    1.1  jonathan int
   1391    1.1  jonathan crypto_kdispatch(struct cryptkop *krp)
   1392    1.1  jonathan {
   1393   1.95  knakahar 	int result, s;
   1394    1.1  jonathan 	struct cryptocap *cap;
   1395   1.95  knakahar 	struct crypto_crp_qs *crp_qs;
   1396   1.95  knakahar 	struct crypto_crp_kq *crp_kq;
   1397    1.1  jonathan 
   1398   1.59  knakahar 	KASSERT(krp != NULL);
   1399  1.126  riastrad 	KASSERT(krp->krp_callback != NULL);
   1400  1.119  riastrad 	KASSERT(!cpu_intr_p());
   1401   1.59  knakahar 
   1402    1.1  jonathan 	cryptostats.cs_kops++;
   1403    1.1  jonathan 
   1404   1.95  knakahar 	crp_qs = crypto_get_crp_qs(&s);
   1405  1.101  knakahar 	crp_kq = crp_qs->crp_kq;
   1406   1.81  knakahar 	cap = crypto_checkdriver_lock(krp->krp_hid);
   1407   1.68  knakahar 	/*
   1408   1.68  knakahar 	 * TODO:
   1409   1.68  knakahar 	 * If we can ensure the driver has been valid until the driver is
   1410   1.68  knakahar 	 * done crypto_unregister(), this migrate operation is not required.
   1411   1.68  knakahar 	 */
   1412   1.68  knakahar 	if (cap == NULL) {
   1413   1.95  knakahar 		TAILQ_INSERT_TAIL(crp_kq, krp, krp_next);
   1414   1.91  knakahar 		result = 0;
   1415   1.91  knakahar 		goto out;
   1416   1.68  knakahar 	}
   1417   1.68  knakahar 
   1418   1.68  knakahar 	if (cap->cc_kqblocked != 0) {
   1419   1.81  knakahar 		crypto_driver_unlock(cap);
   1420    1.1  jonathan 		/*
   1421    1.1  jonathan 		 * The driver is blocked, just queue the op until
   1422    1.1  jonathan 		 * it unblocks and the swi thread gets kicked.
   1423    1.1  jonathan 		 */
   1424   1.95  knakahar 		TAILQ_INSERT_TAIL(crp_kq, krp, krp_next);
   1425   1.91  knakahar 		result = 0;
   1426   1.91  knakahar 		goto out;
   1427   1.68  knakahar 	}
   1428   1.68  knakahar 
   1429   1.81  knakahar 	crypto_driver_unlock(cap);
   1430   1.68  knakahar 	result = crypto_kinvoke(krp, 0);
   1431   1.68  knakahar 	if (result == ERESTART) {
   1432   1.68  knakahar 		/*
   1433   1.68  knakahar 		 * The driver ran out of resources, mark the
   1434   1.68  knakahar 		 * driver ``blocked'' for cryptop's and put
   1435   1.68  knakahar 		 * the op on the queue.
   1436   1.68  knakahar 		 */
   1437   1.81  knakahar 		crypto_driver_lock(cap);
   1438   1.81  knakahar 		cap->cc_kqblocked = 1;
   1439   1.81  knakahar 		crypto_driver_unlock(cap);
   1440   1.95  knakahar 		TAILQ_INSERT_HEAD(crp_kq, krp, krp_next);
   1441   1.68  knakahar 		cryptostats.cs_kblocks++;
   1442   1.68  knakahar 
   1443   1.68  knakahar 		/*
   1444   1.68  knakahar 		 * The krp is enqueued to crp_kq, that is,
   1445   1.68  knakahar 		 * no error occurs. So, this function should
   1446   1.68  knakahar 		 * not return error.
   1447   1.68  knakahar 		 */
   1448    1.1  jonathan 		result = 0;
   1449    1.1  jonathan 	}
   1450    1.1  jonathan 
   1451   1.91  knakahar out:
   1452   1.95  knakahar 	crypto_put_crp_qs(&s);
   1453    1.1  jonathan 	return result;
   1454    1.1  jonathan }
   1455    1.1  jonathan 
   1456    1.1  jonathan /*
   1457  1.115    andvar  * Dispatch an asymmetric crypto request to the appropriate crypto devices.
   1458    1.1  jonathan  */
   1459    1.1  jonathan static int
   1460    1.1  jonathan crypto_kinvoke(struct cryptkop *krp, int hint)
   1461    1.1  jonathan {
   1462   1.77  knakahar 	struct cryptocap *cap = NULL;
   1463    1.1  jonathan 	u_int32_t hid;
   1464    1.1  jonathan 	int error;
   1465    1.1  jonathan 
   1466   1.59  knakahar 	KASSERT(krp != NULL);
   1467  1.126  riastrad 	KASSERT(krp->krp_callback != NULL);
   1468  1.119  riastrad 	KASSERT(!cpu_intr_p());
   1469   1.59  knakahar 
   1470   1.57  knakahar 	mutex_enter(&crypto_drv_mtx);
   1471    1.1  jonathan 	for (hid = 0; hid < crypto_drivers_num; hid++) {
   1472   1.86  christos 		cap = crypto_checkdriver(hid);
   1473   1.77  knakahar 		if (cap == NULL)
   1474   1.77  knakahar 			continue;
   1475   1.81  knakahar 		crypto_driver_lock(cap);
   1476   1.77  knakahar 		if ((cap->cc_flags & CRYPTOCAP_F_SOFTWARE) &&
   1477   1.81  knakahar 		    crypto_devallowsoft == 0) {
   1478   1.81  knakahar 			crypto_driver_unlock(cap);
   1479    1.1  jonathan 			continue;
   1480   1.81  knakahar 		}
   1481   1.81  knakahar 		if (cap->cc_kprocess == NULL) {
   1482   1.81  knakahar 			crypto_driver_unlock(cap);
   1483    1.1  jonathan 			continue;
   1484   1.81  knakahar 		}
   1485   1.77  knakahar 		if ((cap->cc_kalg[krp->krp_op] &
   1486   1.81  knakahar 			CRYPTO_ALG_FLAG_SUPPORTED) == 0) {
   1487   1.81  knakahar 			crypto_driver_unlock(cap);
   1488    1.1  jonathan 			continue;
   1489   1.81  knakahar 		}
   1490    1.1  jonathan 		break;
   1491    1.1  jonathan 	}
   1492   1.81  knakahar 	mutex_exit(&crypto_drv_mtx);
   1493   1.77  knakahar 	if (cap != NULL) {
   1494   1.37  christos 		int (*process)(void *, struct cryptkop *, int);
   1495   1.37  christos 		void *arg;
   1496   1.37  christos 
   1497   1.77  knakahar 		process = cap->cc_kprocess;
   1498   1.77  knakahar 		arg = cap->cc_karg;
   1499    1.1  jonathan 		krp->krp_hid = hid;
   1500   1.92  knakahar 		krp->reqcpu = curcpu();
   1501   1.81  knakahar 		crypto_driver_unlock(cap);
   1502   1.37  christos 		error = (*process)(arg, krp, hint);
   1503    1.1  jonathan 	} else {
   1504    1.1  jonathan 		error = ENODEV;
   1505    1.1  jonathan 	}
   1506    1.1  jonathan 
   1507    1.1  jonathan 	if (error) {
   1508    1.1  jonathan 		krp->krp_status = error;
   1509    1.1  jonathan 		crypto_kdone(krp);
   1510    1.1  jonathan 	}
   1511    1.1  jonathan 	return 0;
   1512    1.1  jonathan }
   1513    1.1  jonathan 
   1514    1.1  jonathan #ifdef CRYPTO_TIMING
   1515    1.1  jonathan static void
   1516    1.1  jonathan crypto_tstat(struct cryptotstat *ts, struct timespec *tv)
   1517    1.1  jonathan {
   1518    1.1  jonathan 	struct timespec now, t;
   1519    1.1  jonathan 
   1520    1.1  jonathan 	nanouptime(&now);
   1521    1.1  jonathan 	t.tv_sec = now.tv_sec - tv->tv_sec;
   1522    1.1  jonathan 	t.tv_nsec = now.tv_nsec - tv->tv_nsec;
   1523    1.1  jonathan 	if (t.tv_nsec < 0) {
   1524    1.1  jonathan 		t.tv_sec--;
   1525    1.1  jonathan 		t.tv_nsec += 1000000000;
   1526    1.1  jonathan 	}
   1527    1.1  jonathan 	timespecadd(&ts->acc, &t, &t);
   1528    1.1  jonathan 	if (timespeccmp(&t, &ts->min, <))
   1529    1.1  jonathan 		ts->min = t;
   1530    1.1  jonathan 	if (timespeccmp(&t, &ts->max, >))
   1531    1.1  jonathan 		ts->max = t;
   1532    1.1  jonathan 	ts->count++;
   1533    1.1  jonathan 
   1534    1.1  jonathan 	*tv = now;
   1535    1.1  jonathan }
   1536    1.1  jonathan #endif
   1537    1.1  jonathan 
   1538    1.1  jonathan /*
   1539    1.1  jonathan  * Dispatch a crypto request to the appropriate crypto devices.
   1540    1.1  jonathan  */
   1541    1.1  jonathan static int
   1542    1.1  jonathan crypto_invoke(struct cryptop *crp, int hint)
   1543    1.1  jonathan {
   1544   1.77  knakahar 	struct cryptocap *cap;
   1545    1.1  jonathan 
   1546   1.59  knakahar 	KASSERT(crp != NULL);
   1547  1.126  riastrad 	KASSERT(crp->crp_callback != NULL);
   1548  1.126  riastrad 	KASSERT(crp->crp_desc != NULL);
   1549  1.119  riastrad 	KASSERT(!cpu_intr_p());
   1550   1.59  knakahar 
   1551    1.1  jonathan #ifdef CRYPTO_TIMING
   1552    1.1  jonathan 	if (crypto_timing)
   1553    1.1  jonathan 		crypto_tstat(&cryptostats.cs_invoke, &crp->crp_tstamp);
   1554    1.1  jonathan #endif
   1555    1.1  jonathan 
   1556   1.81  knakahar 	cap = crypto_checkdriver_lock(CRYPTO_SESID2HID(crp->crp_sid));
   1557   1.77  knakahar 	if (cap != NULL && (cap->cc_flags & CRYPTOCAP_F_CLEANUP) == 0) {
   1558   1.37  christos 		int (*process)(void *, struct cryptop *, int);
   1559   1.37  christos 		void *arg;
   1560   1.37  christos 
   1561   1.77  knakahar 		process = cap->cc_process;
   1562   1.77  knakahar 		arg = cap->cc_arg;
   1563   1.92  knakahar 		crp->reqcpu = curcpu();
   1564   1.37  christos 
   1565   1.37  christos 		/*
   1566   1.37  christos 		 * Invoke the driver to process the request.
   1567   1.37  christos 		 */
   1568   1.64  knakahar 		DPRINTF("calling process for %p\n", crp);
   1569   1.81  knakahar 		crypto_driver_unlock(cap);
   1570   1.37  christos 		return (*process)(arg, crp, hint);
   1571    1.1  jonathan 	} else {
   1572  1.127  riastrad 		if (cap != NULL) {
   1573   1.81  knakahar 			crypto_driver_unlock(cap);
   1574  1.127  riastrad 			crypto_freesession(crp->crp_sid);
   1575  1.127  riastrad 		}
   1576  1.127  riastrad 		crp->crp_etype = ENODEV;
   1577    1.1  jonathan 		crypto_done(crp);
   1578    1.1  jonathan 		return 0;
   1579    1.1  jonathan 	}
   1580    1.1  jonathan }
   1581    1.1  jonathan 
   1582    1.1  jonathan /*
   1583    1.1  jonathan  * Release a set of crypto descriptors.
   1584    1.1  jonathan  */
   1585    1.1  jonathan void
   1586    1.1  jonathan crypto_freereq(struct cryptop *crp)
   1587    1.1  jonathan {
   1588    1.1  jonathan 	struct cryptodesc *crd;
   1589    1.1  jonathan 
   1590    1.1  jonathan 	if (crp == NULL)
   1591    1.1  jonathan 		return;
   1592   1.64  knakahar 	DPRINTF("lid[%u]: crp %p\n", CRYPTO_SESID2LID(crp->crp_sid), crp);
   1593    1.1  jonathan 
   1594   1.30    darran 	/* sanity check */
   1595   1.30    darran 	if (crp->crp_flags & CRYPTO_F_ONRETQ) {
   1596   1.30    darran 		panic("crypto_freereq() freeing crp on RETQ\n");
   1597   1.30    darran 	}
   1598   1.30    darran 
   1599    1.1  jonathan 	while ((crd = crp->crp_desc) != NULL) {
   1600    1.1  jonathan 		crp->crp_desc = crd->crd_next;
   1601  1.100  knakahar 		pool_cache_put(cryptodesc_cache, crd);
   1602    1.1  jonathan 	}
   1603  1.100  knakahar 	pool_cache_put(cryptop_cache, crp);
   1604    1.1  jonathan }
   1605    1.1  jonathan 
   1606    1.1  jonathan /*
   1607    1.1  jonathan  * Acquire a set of crypto descriptors.
   1608    1.1  jonathan  */
   1609    1.1  jonathan struct cryptop *
   1610    1.1  jonathan crypto_getreq(int num)
   1611    1.1  jonathan {
   1612    1.1  jonathan 	struct cryptodesc *crd;
   1613    1.1  jonathan 	struct cryptop *crp;
   1614   1.96  knakahar 	struct crypto_crp_ret_qs *qs;
   1615    1.1  jonathan 
   1616  1.122  riastrad 	KASSERT(num > 0);
   1617  1.122  riastrad 
   1618   1.74  knakahar 	/*
   1619   1.74  knakahar 	 * When crp_ret_q is full, we restrict here to avoid crp_ret_q overflow
   1620   1.74  knakahar 	 * by error callback.
   1621   1.74  knakahar 	 */
   1622   1.96  knakahar 	qs = crypto_get_crp_ret_qs(curcpu());
   1623   1.96  knakahar 	if (qs->crp_ret_q_maxlen > 0
   1624   1.96  knakahar 	    && qs->crp_ret_q_len > qs->crp_ret_q_maxlen) {
   1625   1.96  knakahar 		qs->crp_ret_q_drops++;
   1626   1.96  knakahar 		crypto_put_crp_ret_qs(curcpu());
   1627   1.74  knakahar 		return NULL;
   1628   1.74  knakahar 	}
   1629   1.96  knakahar 	crypto_put_crp_ret_qs(curcpu());
   1630   1.74  knakahar 
   1631  1.102  christos 	crp = pool_cache_get(cryptop_cache, PR_NOWAIT);
   1632    1.1  jonathan 	if (crp == NULL) {
   1633    1.1  jonathan 		return NULL;
   1634    1.1  jonathan 	}
   1635   1.31    cegger 	memset(crp, 0, sizeof(struct cryptop));
   1636    1.1  jonathan 
   1637    1.1  jonathan 	while (num--) {
   1638  1.102  christos 		crd = pool_cache_get(cryptodesc_cache, PR_NOWAIT);
   1639    1.1  jonathan 		if (crd == NULL) {
   1640    1.1  jonathan 			crypto_freereq(crp);
   1641    1.1  jonathan 			return NULL;
   1642    1.1  jonathan 		}
   1643    1.1  jonathan 
   1644   1.31    cegger 		memset(crd, 0, sizeof(struct cryptodesc));
   1645    1.1  jonathan 		crd->crd_next = crp->crp_desc;
   1646    1.1  jonathan 		crp->crp_desc = crd;
   1647    1.1  jonathan 	}
   1648    1.1  jonathan 
   1649    1.1  jonathan 	return crp;
   1650    1.1  jonathan }
   1651    1.1  jonathan 
   1652    1.1  jonathan /*
   1653   1.76  knakahar  * Release a set of asymmetric crypto descriptors.
   1654   1.76  knakahar  * Currently, support one descriptor only.
   1655   1.76  knakahar  */
   1656   1.76  knakahar void
   1657   1.76  knakahar crypto_kfreereq(struct cryptkop *krp)
   1658   1.76  knakahar {
   1659   1.76  knakahar 
   1660   1.76  knakahar 	if (krp == NULL)
   1661   1.76  knakahar 		return;
   1662   1.76  knakahar 
   1663   1.76  knakahar 	DPRINTF("krp %p\n", krp);
   1664   1.76  knakahar 
   1665   1.76  knakahar 	/* sanity check */
   1666   1.76  knakahar 	if (krp->krp_flags & CRYPTO_F_ONRETQ) {
   1667   1.76  knakahar 		panic("crypto_kfreereq() freeing krp on RETQ\n");
   1668   1.76  knakahar 	}
   1669   1.76  knakahar 
   1670  1.100  knakahar 	pool_cache_put(cryptkop_cache, krp);
   1671   1.76  knakahar }
   1672   1.76  knakahar 
   1673   1.76  knakahar /*
   1674   1.76  knakahar  * Acquire a set of asymmetric crypto descriptors.
   1675   1.76  knakahar  * Currently, support one descriptor only.
   1676   1.76  knakahar  */
   1677   1.76  knakahar struct cryptkop *
   1678  1.122  riastrad crypto_kgetreq(int num __diagused, int prflags)
   1679   1.76  knakahar {
   1680   1.76  knakahar 	struct cryptkop *krp;
   1681   1.96  knakahar 	struct crypto_crp_ret_qs *qs;
   1682   1.76  knakahar 
   1683  1.122  riastrad 	KASSERTMSG(num == 1, "num=%d not supported", num);
   1684  1.122  riastrad 
   1685   1.76  knakahar 	/*
   1686   1.76  knakahar 	 * When crp_ret_kq is full, we restrict here to avoid crp_ret_kq
   1687   1.76  knakahar 	 * overflow by error callback.
   1688   1.76  knakahar 	 */
   1689   1.96  knakahar 	qs = crypto_get_crp_ret_qs(curcpu());
   1690   1.96  knakahar 	if (qs->crp_ret_kq_maxlen > 0
   1691   1.96  knakahar 	    && qs->crp_ret_kq_len > qs->crp_ret_kq_maxlen) {
   1692   1.96  knakahar 		qs->crp_ret_kq_drops++;
   1693   1.96  knakahar 		crypto_put_crp_ret_qs(curcpu());
   1694   1.76  knakahar 		return NULL;
   1695   1.76  knakahar 	}
   1696   1.96  knakahar 	crypto_put_crp_ret_qs(curcpu());
   1697   1.76  knakahar 
   1698  1.100  knakahar 	krp = pool_cache_get(cryptkop_cache, prflags);
   1699   1.76  knakahar 	if (krp == NULL) {
   1700   1.76  knakahar 		return NULL;
   1701   1.76  knakahar 	}
   1702   1.76  knakahar 	memset(krp, 0, sizeof(struct cryptkop));
   1703   1.76  knakahar 
   1704   1.76  knakahar 	return krp;
   1705   1.76  knakahar }
   1706   1.76  knakahar 
   1707   1.76  knakahar /*
   1708    1.1  jonathan  * Invoke the callback on behalf of the driver.
   1709    1.1  jonathan  */
   1710    1.1  jonathan void
   1711    1.1  jonathan crypto_done(struct cryptop *crp)
   1712    1.1  jonathan {
   1713  1.118  riastrad 	int wasempty;
   1714  1.118  riastrad 	struct crypto_crp_ret_qs *qs;
   1715  1.118  riastrad 	struct crypto_crp_ret_q *crp_ret_q;
   1716   1.23       tls 
   1717   1.59  knakahar 	KASSERT(crp != NULL);
   1718   1.59  knakahar 
   1719    1.1  jonathan 	if (crp->crp_etype != 0)
   1720    1.1  jonathan 		cryptostats.cs_errs++;
   1721    1.1  jonathan #ifdef CRYPTO_TIMING
   1722    1.1  jonathan 	if (crypto_timing)
   1723    1.1  jonathan 		crypto_tstat(&cryptostats.cs_done, &crp->crp_tstamp);
   1724    1.1  jonathan #endif
   1725   1.64  knakahar 	DPRINTF("lid[%u]: crp %p\n", CRYPTO_SESID2LID(crp->crp_sid), crp);
   1726   1.27       tls 
   1727  1.118  riastrad 	qs = crypto_get_crp_ret_qs(crp->reqcpu);
   1728  1.118  riastrad 	crp_ret_q = &qs->crp_ret_q;
   1729  1.118  riastrad 	wasempty = TAILQ_EMPTY(crp_ret_q);
   1730  1.118  riastrad 	DPRINTF("lid[%u]: queueing %p\n", CRYPTO_SESID2LID(crp->crp_sid), crp);
   1731  1.118  riastrad 	crp->crp_flags |= CRYPTO_F_ONRETQ;
   1732  1.118  riastrad 	TAILQ_INSERT_TAIL(crp_ret_q, crp, crp_next);
   1733  1.118  riastrad 	qs->crp_ret_q_len++;
   1734  1.118  riastrad 	if (wasempty && !qs->crp_ret_q_exit_flag) {
   1735  1.118  riastrad 		DPRINTF("lid[%u]: waking cryptoret, crp %p hit empty queue\n.",
   1736  1.118  riastrad 		    CRYPTO_SESID2LID(crp->crp_sid), crp);
   1737  1.118  riastrad 		softint_schedule_cpu(crypto_ret_si, crp->reqcpu);
   1738    1.1  jonathan 	}
   1739  1.118  riastrad 	crypto_put_crp_ret_qs(crp->reqcpu);
   1740    1.1  jonathan }
   1741    1.1  jonathan 
   1742    1.1  jonathan /*
   1743    1.1  jonathan  * Invoke the callback on behalf of the driver.
   1744    1.1  jonathan  */
   1745    1.1  jonathan void
   1746    1.1  jonathan crypto_kdone(struct cryptkop *krp)
   1747    1.1  jonathan {
   1748  1.118  riastrad 	int wasempty;
   1749  1.118  riastrad 	struct crypto_crp_ret_qs *qs;
   1750  1.118  riastrad 	struct crypto_crp_ret_kq *crp_ret_kq;
   1751    1.1  jonathan 
   1752   1.59  knakahar 	KASSERT(krp != NULL);
   1753   1.59  knakahar 
   1754    1.1  jonathan 	if (krp->krp_status != 0)
   1755    1.1  jonathan 		cryptostats.cs_kerrs++;
   1756  1.118  riastrad 
   1757  1.118  riastrad 	qs = crypto_get_crp_ret_qs(krp->reqcpu);
   1758  1.118  riastrad 	crp_ret_kq = &qs->crp_ret_kq;
   1759   1.90  knakahar 
   1760  1.118  riastrad 	wasempty = TAILQ_EMPTY(crp_ret_kq);
   1761  1.118  riastrad 	krp->krp_flags |= CRYPTO_F_ONRETQ;
   1762  1.118  riastrad 	TAILQ_INSERT_TAIL(crp_ret_kq, krp, krp_next);
   1763  1.118  riastrad 	qs->crp_ret_kq_len++;
   1764  1.118  riastrad 	if (wasempty && !qs->crp_ret_q_exit_flag)
   1765  1.118  riastrad 		softint_schedule_cpu(crypto_ret_si, krp->reqcpu);
   1766  1.118  riastrad 	crypto_put_crp_ret_qs(krp->reqcpu);
   1767    1.1  jonathan }
   1768    1.1  jonathan 
   1769    1.1  jonathan int
   1770    1.1  jonathan crypto_getfeat(int *featp)
   1771    1.1  jonathan {
   1772    1.1  jonathan 
   1773   1.85  christos 	if (crypto_userasymcrypto == 0) {
   1774   1.85  christos 		*featp = 0;
   1775   1.57  knakahar 		return 0;
   1776   1.85  christos 	}
   1777    1.1  jonathan 
   1778   1.57  knakahar 	mutex_enter(&crypto_drv_mtx);
   1779    1.1  jonathan 
   1780   1.85  christos 	int feat = 0;
   1781   1.85  christos 	for (int hid = 0; hid < crypto_drivers_num; hid++) {
   1782   1.77  knakahar 		struct cryptocap *cap;
   1783   1.86  christos 		cap = crypto_checkdriver(hid);
   1784   1.77  knakahar 		if (cap == NULL)
   1785   1.77  knakahar 			continue;
   1786   1.77  knakahar 
   1787   1.85  christos 		crypto_driver_lock(cap);
   1788   1.85  christos 
   1789   1.77  knakahar 		if ((cap->cc_flags & CRYPTOCAP_F_SOFTWARE) &&
   1790   1.85  christos 		    crypto_devallowsoft == 0)
   1791   1.85  christos 			goto unlock;
   1792   1.85  christos 
   1793   1.85  christos 		if (cap->cc_kprocess == NULL)
   1794   1.85  christos 			goto unlock;
   1795   1.85  christos 
   1796   1.85  christos 		for (int kalg = 0; kalg < CRK_ALGORITHM_MAX; kalg++)
   1797   1.77  knakahar 			if ((cap->cc_kalg[kalg] &
   1798    1.1  jonathan 			    CRYPTO_ALG_FLAG_SUPPORTED) != 0)
   1799    1.1  jonathan 				feat |=  1 << kalg;
   1800   1.81  knakahar 
   1801   1.85  christos unlock:		crypto_driver_unlock(cap);
   1802    1.1  jonathan 	}
   1803   1.57  knakahar 
   1804   1.57  knakahar 	mutex_exit(&crypto_drv_mtx);
   1805    1.1  jonathan 	*featp = feat;
   1806    1.1  jonathan 	return (0);
   1807    1.1  jonathan }
   1808    1.1  jonathan 
   1809    1.1  jonathan /*
   1810    1.1  jonathan  * Software interrupt thread to dispatch crypto requests.
   1811    1.1  jonathan  */
   1812    1.1  jonathan static void
   1813   1.97  knakahar cryptointr(void *arg __unused)
   1814    1.1  jonathan {
   1815   1.30    darran 	struct cryptop *crp, *submit, *cnext;
   1816   1.30    darran 	struct cryptkop *krp, *knext;
   1817    1.1  jonathan 	struct cryptocap *cap;
   1818   1.95  knakahar 	struct crypto_crp_qs *crp_qs;
   1819   1.95  knakahar 	struct crypto_crp_q *crp_q;
   1820   1.95  knakahar 	struct crypto_crp_kq *crp_kq;
   1821   1.95  knakahar 	int result, hint, s;
   1822    1.1  jonathan 
   1823    1.1  jonathan 	cryptostats.cs_intrs++;
   1824   1.95  knakahar 	crp_qs = crypto_get_crp_qs(&s);
   1825  1.101  knakahar 	crp_q = crp_qs->crp_q;
   1826  1.101  knakahar 	crp_kq = crp_qs->crp_kq;
   1827    1.1  jonathan 	do {
   1828    1.1  jonathan 		/*
   1829    1.1  jonathan 		 * Find the first element in the queue that can be
   1830    1.1  jonathan 		 * processed and look-ahead to see if multiple ops
   1831    1.1  jonathan 		 * are ready for the same driver.
   1832    1.1  jonathan 		 */
   1833    1.1  jonathan 		submit = NULL;
   1834    1.1  jonathan 		hint = 0;
   1835   1.95  knakahar 		TAILQ_FOREACH_SAFE(crp, crp_q, crp_next, cnext) {
   1836   1.35  jakllsch 			u_int32_t hid = CRYPTO_SESID2HID(crp->crp_sid);
   1837   1.81  knakahar 			cap = crypto_checkdriver_lock(hid);
   1838    1.1  jonathan 			if (cap == NULL || cap->cc_process == NULL) {
   1839   1.81  knakahar 				if (cap != NULL)
   1840   1.81  knakahar 					crypto_driver_unlock(cap);
   1841    1.1  jonathan 				/* Op needs to be migrated, process it. */
   1842   1.69  knakahar 				submit = crp;
   1843    1.1  jonathan 				break;
   1844    1.1  jonathan 			}
   1845   1.70  knakahar 
   1846   1.70  knakahar 			/*
   1847   1.70  knakahar 			 * skip blocked crp regardless of CRYPTO_F_BATCH
   1848   1.70  knakahar 			 */
   1849   1.81  knakahar 			if (cap->cc_qblocked != 0) {
   1850   1.81  knakahar 				crypto_driver_unlock(cap);
   1851   1.70  knakahar 				continue;
   1852   1.81  knakahar 			}
   1853   1.81  knakahar 			crypto_driver_unlock(cap);
   1854   1.70  knakahar 
   1855   1.71  knakahar 			/*
   1856   1.71  knakahar 			 * skip batch crp until the end of crp_q
   1857   1.71  knakahar 			 */
   1858   1.71  knakahar 			if ((crp->crp_flags & CRYPTO_F_BATCH) != 0) {
   1859   1.71  knakahar 				if (submit == NULL) {
   1860   1.71  knakahar 					submit = crp;
   1861   1.71  knakahar 				} else {
   1862   1.71  knakahar 					if (CRYPTO_SESID2HID(submit->crp_sid)
   1863   1.71  knakahar 					    == hid)
   1864   1.71  knakahar 						hint = CRYPTO_HINT_MORE;
   1865   1.71  knakahar 				}
   1866   1.71  knakahar 
   1867   1.71  knakahar 				continue;
   1868    1.1  jonathan 			}
   1869   1.71  knakahar 
   1870   1.71  knakahar 			/*
   1871   1.71  knakahar 			 * found first crp which is neither blocked nor batch.
   1872   1.71  knakahar 			 */
   1873   1.71  knakahar 			submit = crp;
   1874   1.71  knakahar 			/*
   1875   1.71  knakahar 			 * batch crp can be processed much later, so clear hint.
   1876   1.71  knakahar 			 */
   1877   1.71  knakahar 			hint = 0;
   1878   1.71  knakahar 			break;
   1879    1.1  jonathan 		}
   1880    1.1  jonathan 		if (submit != NULL) {
   1881   1.95  knakahar 			TAILQ_REMOVE(crp_q, submit, crp_next);
   1882    1.1  jonathan 			result = crypto_invoke(submit, hint);
   1883   1.23       tls 			/* we must take here as the TAILQ op or kinvoke
   1884   1.23       tls 			   may need this mutex below.  sigh. */
   1885    1.1  jonathan 			if (result == ERESTART) {
   1886    1.1  jonathan 				/*
   1887    1.1  jonathan 				 * The driver ran out of resources, mark the
   1888    1.1  jonathan 				 * driver ``blocked'' for cryptop's and put
   1889    1.1  jonathan 				 * the request back in the queue.  It would
   1890    1.1  jonathan 				 * best to put the request back where we got
   1891    1.1  jonathan 				 * it but that's hard so for now we put it
   1892    1.1  jonathan 				 * at the front.  This should be ok; putting
   1893    1.1  jonathan 				 * it at the end does not work.
   1894    1.1  jonathan 				 */
   1895   1.77  knakahar 				/* validate sid again */
   1896   1.81  knakahar 				cap = crypto_checkdriver_lock(CRYPTO_SESID2HID(submit->crp_sid));
   1897   1.77  knakahar 				if (cap == NULL) {
   1898   1.77  knakahar 					/* migrate again, sigh... */
   1899   1.95  knakahar 					TAILQ_INSERT_TAIL(crp_q, submit, crp_next);
   1900   1.77  knakahar 				} else {
   1901   1.77  knakahar 					cap->cc_qblocked = 1;
   1902   1.81  knakahar 					crypto_driver_unlock(cap);
   1903   1.95  knakahar 					TAILQ_INSERT_HEAD(crp_q, submit, crp_next);
   1904   1.77  knakahar 					cryptostats.cs_blocks++;
   1905   1.77  knakahar 				}
   1906    1.1  jonathan 			}
   1907    1.1  jonathan 		}
   1908    1.1  jonathan 
   1909    1.1  jonathan 		/* As above, but for key ops */
   1910   1.95  knakahar 		TAILQ_FOREACH_SAFE(krp, crp_kq, krp_next, knext) {
   1911   1.81  knakahar 			cap = crypto_checkdriver_lock(krp->krp_hid);
   1912    1.1  jonathan 			if (cap == NULL || cap->cc_kprocess == NULL) {
   1913   1.81  knakahar 				if (cap != NULL)
   1914   1.81  knakahar 					crypto_driver_unlock(cap);
   1915    1.1  jonathan 				/* Op needs to be migrated, process it. */
   1916    1.1  jonathan 				break;
   1917    1.1  jonathan 			}
   1918   1.81  knakahar 			if (!cap->cc_kqblocked) {
   1919   1.81  knakahar 				crypto_driver_unlock(cap);
   1920    1.1  jonathan 				break;
   1921   1.81  knakahar 			}
   1922   1.81  knakahar 			crypto_driver_unlock(cap);
   1923    1.1  jonathan 		}
   1924    1.1  jonathan 		if (krp != NULL) {
   1925   1.95  knakahar 			TAILQ_REMOVE(crp_kq, krp, krp_next);
   1926    1.1  jonathan 			result = crypto_kinvoke(krp, 0);
   1927   1.23       tls 			/* the next iteration will want the mutex. :-/ */
   1928    1.1  jonathan 			if (result == ERESTART) {
   1929    1.1  jonathan 				/*
   1930    1.1  jonathan 				 * The driver ran out of resources, mark the
   1931    1.1  jonathan 				 * driver ``blocked'' for cryptkop's and put
   1932    1.1  jonathan 				 * the request back in the queue.  It would
   1933    1.1  jonathan 				 * best to put the request back where we got
   1934    1.1  jonathan 				 * it but that's hard so for now we put it
   1935    1.1  jonathan 				 * at the front.  This should be ok; putting
   1936    1.1  jonathan 				 * it at the end does not work.
   1937    1.1  jonathan 				 */
   1938   1.77  knakahar 				/* validate sid again */
   1939   1.81  knakahar 				cap = crypto_checkdriver_lock(krp->krp_hid);
   1940   1.77  knakahar 				if (cap == NULL) {
   1941   1.77  knakahar 					/* migrate again, sigh... */
   1942   1.95  knakahar 					TAILQ_INSERT_TAIL(crp_kq, krp, krp_next);
   1943   1.77  knakahar 				} else {
   1944   1.77  knakahar 					cap->cc_kqblocked = 1;
   1945   1.81  knakahar 					crypto_driver_unlock(cap);
   1946   1.95  knakahar 					TAILQ_INSERT_HEAD(crp_kq, krp, krp_next);
   1947   1.77  knakahar 					cryptostats.cs_kblocks++;
   1948   1.77  knakahar 				}
   1949    1.1  jonathan 			}
   1950    1.1  jonathan 		}
   1951    1.1  jonathan 	} while (submit != NULL || krp != NULL);
   1952   1.95  knakahar 	crypto_put_crp_qs(&s);
   1953    1.1  jonathan }
   1954    1.1  jonathan 
   1955    1.1  jonathan /*
   1956   1.92  knakahar  * softint handler to do callbacks.
   1957    1.1  jonathan  */
   1958    1.1  jonathan static void
   1959   1.92  knakahar cryptoret_softint(void *arg __unused)
   1960    1.1  jonathan {
   1961   1.96  knakahar 	struct crypto_crp_ret_qs *qs;
   1962  1.106      maya 	struct crypto_crp_ret_q *crp_ret_q;
   1963  1.106      maya 	struct crypto_crp_ret_kq *crp_ret_kq;
   1964   1.96  knakahar 
   1965   1.96  knakahar 	qs = crypto_get_crp_ret_qs(curcpu());
   1966   1.96  knakahar 	crp_ret_q = &qs->crp_ret_q;
   1967   1.96  knakahar 	crp_ret_kq = &qs->crp_ret_kq;
   1968    1.1  jonathan 	for (;;) {
   1969   1.92  knakahar 		struct cryptop *crp;
   1970   1.92  knakahar 		struct cryptkop *krp;
   1971   1.92  knakahar 
   1972   1.96  knakahar 		crp = TAILQ_FIRST(crp_ret_q);
   1973   1.23       tls 		if (crp != NULL) {
   1974   1.96  knakahar 			TAILQ_REMOVE(crp_ret_q, crp, crp_next);
   1975   1.96  knakahar 			qs->crp_ret_q_len--;
   1976   1.23       tls 			crp->crp_flags &= ~CRYPTO_F_ONRETQ;
   1977   1.23       tls 		}
   1978   1.96  knakahar 		krp = TAILQ_FIRST(crp_ret_kq);
   1979   1.23       tls 		if (krp != NULL) {
   1980   1.96  knakahar 			TAILQ_REMOVE(crp_ret_kq, krp, krp_next);
   1981   1.96  knakahar 			qs->crp_ret_q_len--;
   1982   1.23       tls 			krp->krp_flags &= ~CRYPTO_F_ONRETQ;
   1983   1.23       tls 		}
   1984    1.1  jonathan 
   1985   1.23       tls 		/* drop before calling any callbacks. */
   1986   1.92  knakahar 		if (crp == NULL && krp == NULL)
   1987   1.92  knakahar 			break;
   1988   1.26        ad 
   1989   1.96  knakahar 		mutex_spin_exit(&qs->crp_ret_q_mtx);
   1990   1.26        ad 		if (crp != NULL) {
   1991    1.1  jonathan #ifdef CRYPTO_TIMING
   1992   1.26        ad 			if (crypto_timing) {
   1993   1.26        ad 				/*
   1994   1.26        ad 				 * NB: We must copy the timestamp before
   1995   1.26        ad 				 * doing the callback as the cryptop is
   1996   1.26        ad 				 * likely to be reclaimed.
   1997   1.26        ad 				 */
   1998   1.26        ad 				struct timespec t = crp->crp_tstamp;
   1999   1.26        ad 				crypto_tstat(&cryptostats.cs_cb, &t);
   2000   1.26        ad 				crp->crp_callback(crp);
   2001   1.26        ad 				crypto_tstat(&cryptostats.cs_finis, &t);
   2002   1.26        ad 			} else
   2003    1.1  jonathan #endif
   2004   1.26        ad 			{
   2005   1.26        ad 				crp->crp_callback(crp);
   2006    1.1  jonathan 			}
   2007    1.1  jonathan 		}
   2008   1.26        ad 		if (krp != NULL)
   2009   1.26        ad 			krp->krp_callback(krp);
   2010   1.26        ad 
   2011   1.96  knakahar 		mutex_spin_enter(&qs->crp_ret_q_mtx);
   2012    1.1  jonathan 	}
   2013   1.96  knakahar 	crypto_put_crp_ret_qs(curcpu());
   2014    1.1  jonathan }
   2015   1.42  pgoyette 
   2016   1.42  pgoyette /* NetBSD module interface */
   2017   1.42  pgoyette 
   2018   1.42  pgoyette MODULE(MODULE_CLASS_MISC, opencrypto, NULL);
   2019   1.42  pgoyette 
   2020   1.42  pgoyette static int
   2021   1.42  pgoyette opencrypto_modcmd(modcmd_t cmd, void *opaque)
   2022   1.42  pgoyette {
   2023   1.46  pgoyette 	int error = 0;
   2024   1.42  pgoyette 
   2025   1.42  pgoyette 	switch (cmd) {
   2026   1.42  pgoyette 	case MODULE_CMD_INIT:
   2027   1.43  pgoyette #ifdef _MODULE
   2028   1.46  pgoyette 		error = crypto_init();
   2029   1.43  pgoyette #endif
   2030   1.46  pgoyette 		break;
   2031   1.42  pgoyette 	case MODULE_CMD_FINI:
   2032   1.43  pgoyette #ifdef _MODULE
   2033   1.46  pgoyette 		error = crypto_destroy(true);
   2034   1.43  pgoyette #endif
   2035   1.46  pgoyette 		break;
   2036   1.42  pgoyette 	default:
   2037   1.46  pgoyette 		error = ENOTTY;
   2038   1.42  pgoyette 	}
   2039   1.46  pgoyette 	return error;
   2040   1.42  pgoyette }
   2041