crypto.c revision 159240
1104476Ssam/* $OpenBSD: crypto.c,v 1.38 2002/06/11 11:14:29 beck Exp $ */ 2139825Simp/*- 3104476Ssam * The author of this code is Angelos D. Keromytis (angelos@cis.upenn.edu) 4104476Ssam * 5104476Ssam * This code was written by Angelos D. Keromytis in Athens, Greece, in 6104476Ssam * February 2000. Network Security Technologies Inc. (NSTI) kindly 7104476Ssam * supported the development of this code. 8104476Ssam * 9104476Ssam * Copyright (c) 2000, 2001 Angelos D. Keromytis 10104476Ssam * 11104476Ssam * Permission to use, copy, and modify this software with or without fee 12104476Ssam * is hereby granted, provided that this entire notice is included in 13104476Ssam * all source code copies of any software which is or includes a copy or 14104476Ssam * modification of this software. 15104476Ssam * 16104476Ssam * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR 17104476Ssam * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY 18104476Ssam * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE 19104476Ssam * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR 20104476Ssam * PURPOSE. 21104476Ssam */ 22116191Sobrien 23116191Sobrien#include <sys/cdefs.h> 24116191Sobrien__FBSDID("$FreeBSD: head/sys/opencrypto/crypto.c 159240 2006-06-04 22:12:08Z pjd $"); 25116191Sobrien 26108587Ssam#define CRYPTO_TIMING /* enable timing support */ 27104476Ssam 28104476Ssam#include <sys/param.h> 29104476Ssam#include <sys/systm.h> 30104476Ssam#include <sys/eventhandler.h> 31104476Ssam#include <sys/kernel.h> 32104476Ssam#include <sys/kthread.h> 33104476Ssam#include <sys/lock.h> 34129880Sphk#include <sys/module.h> 35104476Ssam#include <sys/mutex.h> 36104476Ssam#include <sys/malloc.h> 37104476Ssam#include <sys/proc.h> 38104476Ssam#include <sys/sysctl.h> 39104476Ssam 40104476Ssam#include <vm/uma.h> 41104476Ssam#include <opencrypto/cryptodev.h> 42104628Ssam#include <opencrypto/xform.h> /* XXX for M_XDATA */ 43104476Ssam 44104476Ssam/* 45104476Ssam * Crypto drivers register themselves by allocating a slot in the 46104476Ssam * crypto_drivers table with crypto_get_driverid() and then registering 47104476Ssam * each algorithm they support with crypto_register() and crypto_kregister(). 48104476Ssam */ 49104476Ssamstatic struct mtx crypto_drivers_mtx; /* lock on driver table */ 50104476Ssam#define CRYPTO_DRIVER_LOCK() mtx_lock(&crypto_drivers_mtx) 51104476Ssam#define CRYPTO_DRIVER_UNLOCK() mtx_unlock(&crypto_drivers_mtx) 52104476Ssamstatic struct cryptocap *crypto_drivers = NULL; 53104476Ssamstatic int crypto_drivers_num = 0; 54104476Ssam 55104476Ssam/* 56104476Ssam * There are two queues for crypto requests; one for symmetric (e.g. 57104476Ssam * cipher) operations and one for asymmetric (e.g. MOD)operations. 58104476Ssam * A single mutex is used to lock access to both queues. We could 59104476Ssam * have one per-queue but having one simplifies handling of block/unblock 60104476Ssam * operations. 61104476Ssam */ 62158827Spjdstatic int crp_sleep = 0; 63104476Ssamstatic TAILQ_HEAD(,cryptop) crp_q; /* request queues */ 64104476Ssamstatic TAILQ_HEAD(,cryptkop) crp_kq; 65104476Ssamstatic struct mtx crypto_q_mtx; 66104476Ssam#define CRYPTO_Q_LOCK() mtx_lock(&crypto_q_mtx) 67104476Ssam#define CRYPTO_Q_UNLOCK() mtx_unlock(&crypto_q_mtx) 68104476Ssam 69104476Ssam/* 70104476Ssam * There are two queues for processing completed crypto requests; one 71104476Ssam * for the symmetric and one for the asymmetric ops. We only need one 72104476Ssam * but have two to avoid type futzing (cryptop vs. cryptkop). A single 73104476Ssam * mutex is used to lock access to both queues. Note that this lock 74104476Ssam * must be separate from the lock on request queues to insure driver 75104476Ssam * callbacks don't generate lock order reversals. 76104476Ssam */ 77104476Ssamstatic TAILQ_HEAD(,cryptop) crp_ret_q; /* callback queues */ 78104476Ssamstatic TAILQ_HEAD(,cryptkop) crp_ret_kq; 79104476Ssamstatic struct mtx crypto_ret_q_mtx; 80104476Ssam#define CRYPTO_RETQ_LOCK() mtx_lock(&crypto_ret_q_mtx) 81104476Ssam#define CRYPTO_RETQ_UNLOCK() mtx_unlock(&crypto_ret_q_mtx) 82158826Spjd#define CRYPTO_RETQ_EMPTY() (TAILQ_EMPTY(&crp_ret_q) && TAILQ_EMPTY(&crp_ret_kq)) 83104476Ssam 84104476Ssamstatic uma_zone_t cryptop_zone; 85104476Ssamstatic uma_zone_t cryptodesc_zone; 86104476Ssam 87104476Ssamint crypto_userasymcrypto = 1; /* userland may do asym crypto reqs */ 88104476SsamSYSCTL_INT(_kern, OID_AUTO, userasymcrypto, CTLFLAG_RW, 89104476Ssam &crypto_userasymcrypto, 0, 90104476Ssam "Enable/disable user-mode access to asymmetric crypto support"); 91104476Ssamint crypto_devallowsoft = 0; /* only use hardware crypto for asym */ 92104476SsamSYSCTL_INT(_kern, OID_AUTO, cryptodevallowsoft, CTLFLAG_RW, 93104476Ssam &crypto_devallowsoft, 0, 94104476Ssam "Enable/disable use of software asym crypto support"); 95104476Ssam 96104476SsamMALLOC_DEFINE(M_CRYPTO_DATA, "crypto", "crypto session records"); 97104476Ssam 98108588Ssamstatic void crypto_proc(void); 99108588Ssamstatic struct proc *cryptoproc; 100108588Ssamstatic void crypto_ret_proc(void); 101108588Ssamstatic struct proc *cryptoretproc; 102108588Ssamstatic void crypto_destroy(void); 103158702Spjdstatic int crypto_invoke(struct cryptocap *cap, struct cryptop *crp, int hint); 104158702Spjdstatic int crypto_kinvoke(struct cryptkop *krp); 105108588Ssam 106108587Ssamstatic struct cryptostats cryptostats; 107108587SsamSYSCTL_STRUCT(_kern, OID_AUTO, crypto_stats, CTLFLAG_RW, &cryptostats, 108108587Ssam cryptostats, "Crypto system statistics"); 109108587Ssam 110108587Ssam#ifdef CRYPTO_TIMING 111108587Ssamstatic int crypto_timing = 0; 112108587SsamSYSCTL_INT(_debug, OID_AUTO, crypto_timing, CTLFLAG_RW, 113108587Ssam &crypto_timing, 0, "Enable/disable crypto timing support"); 114108587Ssam#endif 115108587Ssam 116108588Ssamstatic int 117104476Ssamcrypto_init(void) 118104476Ssam{ 119108588Ssam int error; 120108588Ssam 121115746Ssam mtx_init(&crypto_drivers_mtx, "crypto", "crypto driver table", 122115746Ssam MTX_DEF|MTX_QUIET); 123108588Ssam 124108588Ssam TAILQ_INIT(&crp_q); 125108588Ssam TAILQ_INIT(&crp_kq); 126115746Ssam mtx_init(&crypto_q_mtx, "crypto", "crypto op queues", MTX_DEF); 127108588Ssam 128108588Ssam TAILQ_INIT(&crp_ret_q); 129108588Ssam TAILQ_INIT(&crp_ret_kq); 130115746Ssam mtx_init(&crypto_ret_q_mtx, "crypto", "crypto return queues", MTX_DEF); 131108588Ssam 132104476Ssam cryptop_zone = uma_zcreate("cryptop", sizeof (struct cryptop), 133104476Ssam 0, 0, 0, 0, 134104476Ssam UMA_ALIGN_PTR, UMA_ZONE_ZINIT); 135104476Ssam cryptodesc_zone = uma_zcreate("cryptodesc", sizeof (struct cryptodesc), 136104476Ssam 0, 0, 0, 0, 137104476Ssam UMA_ALIGN_PTR, UMA_ZONE_ZINIT); 138108588Ssam if (cryptodesc_zone == NULL || cryptop_zone == NULL) { 139108588Ssam printf("crypto_init: cannot setup crypto zones\n"); 140108588Ssam error = ENOMEM; 141108588Ssam goto bad; 142108588Ssam } 143104476Ssam 144104476Ssam crypto_drivers_num = CRYPTO_DRIVERS_INITIAL; 145104476Ssam crypto_drivers = malloc(crypto_drivers_num * 146104476Ssam sizeof(struct cryptocap), M_CRYPTO_DATA, M_NOWAIT | M_ZERO); 147108588Ssam if (crypto_drivers == NULL) { 148108588Ssam printf("crypto_init: cannot setup crypto drivers\n"); 149108588Ssam error = ENOMEM; 150108588Ssam goto bad; 151108588Ssam } 152104476Ssam 153108588Ssam error = kthread_create((void (*)(void *)) crypto_proc, NULL, 154108588Ssam &cryptoproc, 0, 0, "crypto"); 155108588Ssam if (error) { 156108588Ssam printf("crypto_init: cannot start crypto thread; error %d", 157108588Ssam error); 158108588Ssam goto bad; 159108588Ssam } 160104476Ssam 161108588Ssam error = kthread_create((void (*)(void *)) crypto_ret_proc, NULL, 162108588Ssam &cryptoretproc, 0, 0, "crypto returns"); 163108588Ssam if (error) { 164108588Ssam printf("crypto_init: cannot start cryptoret thread; error %d", 165108588Ssam error); 166108588Ssam goto bad; 167108588Ssam } 168108588Ssam return 0; 169108588Ssambad: 170108588Ssam crypto_destroy(); 171108588Ssam return error; 172104476Ssam} 173104476Ssam 174104476Ssam/* 175108588Ssam * Signal a crypto thread to terminate. We use the driver 176108588Ssam * table lock to synchronize the sleep/wakeups so that we 177108588Ssam * are sure the threads have terminated before we release 178108588Ssam * the data structures they use. See crypto_finis below 179108588Ssam * for the other half of this song-and-dance. 180108588Ssam */ 181108588Ssamstatic void 182108588Ssamcrypto_terminate(struct proc **pp, void *q) 183108588Ssam{ 184108588Ssam struct proc *p; 185108588Ssam 186108588Ssam mtx_assert(&crypto_drivers_mtx, MA_OWNED); 187108588Ssam p = *pp; 188108588Ssam *pp = NULL; 189108588Ssam if (p) { 190108588Ssam wakeup_one(q); 191108588Ssam PROC_LOCK(p); /* NB: insure we don't miss wakeup */ 192108588Ssam CRYPTO_DRIVER_UNLOCK(); /* let crypto_finis progress */ 193108588Ssam msleep(p, &p->p_mtx, PWAIT, "crypto_destroy", 0); 194108588Ssam PROC_UNLOCK(p); 195108588Ssam CRYPTO_DRIVER_LOCK(); 196108588Ssam } 197108588Ssam} 198108588Ssam 199108588Ssamstatic void 200108588Ssamcrypto_destroy(void) 201108588Ssam{ 202108588Ssam /* 203108588Ssam * Terminate any crypto threads. 204108588Ssam */ 205108588Ssam CRYPTO_DRIVER_LOCK(); 206108588Ssam crypto_terminate(&cryptoproc, &crp_q); 207108588Ssam crypto_terminate(&cryptoretproc, &crp_ret_q); 208108588Ssam CRYPTO_DRIVER_UNLOCK(); 209108588Ssam 210108588Ssam /* XXX flush queues??? */ 211108588Ssam 212108588Ssam /* 213108588Ssam * Reclaim dynamically allocated resources. 214108588Ssam */ 215108588Ssam if (crypto_drivers != NULL) 216108588Ssam free(crypto_drivers, M_CRYPTO_DATA); 217108588Ssam 218108588Ssam if (cryptodesc_zone != NULL) 219108588Ssam uma_zdestroy(cryptodesc_zone); 220108588Ssam if (cryptop_zone != NULL) 221108588Ssam uma_zdestroy(cryptop_zone); 222108588Ssam mtx_destroy(&crypto_q_mtx); 223108588Ssam mtx_destroy(&crypto_ret_q_mtx); 224108588Ssam mtx_destroy(&crypto_drivers_mtx); 225108588Ssam} 226108588Ssam 227108588Ssam/* 228105251Smarkm * Initialization code, both for static and dynamic loading. 229105251Smarkm */ 230105251Smarkmstatic int 231105251Smarkmcrypto_modevent(module_t mod, int type, void *unused) 232105251Smarkm{ 233108588Ssam int error = EINVAL; 234108588Ssam 235105251Smarkm switch (type) { 236105251Smarkm case MOD_LOAD: 237108588Ssam error = crypto_init(); 238108588Ssam if (error == 0 && bootverbose) 239105251Smarkm printf("crypto: <crypto core>\n"); 240108588Ssam break; 241105251Smarkm case MOD_UNLOAD: 242105251Smarkm /*XXX disallow if active sessions */ 243108588Ssam error = 0; 244108588Ssam crypto_destroy(); 245105251Smarkm return 0; 246105251Smarkm } 247108588Ssam return error; 248105251Smarkm} 249105251Smarkm 250105251Smarkmstatic moduledata_t crypto_mod = { 251105251Smarkm "crypto", 252105251Smarkm crypto_modevent, 253105251Smarkm 0 254105251Smarkm}; 255105251SmarkmMODULE_VERSION(crypto, 1); 256106676SsamDECLARE_MODULE(crypto, crypto_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); 257156281SwkoszekMODULE_DEPEND(crypto, zlib, 1, 1, 1); 258105251Smarkm 259105251Smarkm/* 260104476Ssam * Create a new session. 261104476Ssam */ 262104476Ssamint 263104476Ssamcrypto_newsession(u_int64_t *sid, struct cryptoini *cri, int hard) 264104476Ssam{ 265159240Spjd struct cryptocap *cap = NULL; 266104476Ssam struct cryptoini *cr; 267159240Spjd u_int32_t hid = 0, lid; 268104476Ssam int err = EINVAL; 269104476Ssam 270104476Ssam CRYPTO_DRIVER_LOCK(); 271104476Ssam 272104476Ssam if (crypto_drivers == NULL) 273104476Ssam goto done; 274104476Ssam 275104476Ssam /* 276104476Ssam * The algorithm we use here is pretty stupid; just use the 277104476Ssam * first driver that supports all the algorithms we need. 278104476Ssam * 279104476Ssam * XXX We need more smarts here (in real life too, but that's 280104476Ssam * XXX another story altogether). 281104476Ssam */ 282104476Ssam 283159240Spjd /* 284159240Spjd * First try to find hardware crypto. 285159240Spjd */ 286159240Spjd if (hard >= 0) { 287159240Spjd for (hid = 0; hid < crypto_drivers_num; hid++) { 288159240Spjd cap = &crypto_drivers[hid]; 289159240Spjd /* 290159240Spjd * If it's not initialized or has remaining sessions 291159240Spjd * referencing it, skip. 292159240Spjd */ 293159240Spjd if (cap->cc_newsession == NULL || 294159240Spjd (cap->cc_flags & CRYPTOCAP_F_CLEANUP)) 295159240Spjd continue; 296104476Ssam 297159240Spjd /* Hardware required -- ignore software drivers. */ 298159240Spjd if (cap->cc_flags & CRYPTOCAP_F_SOFTWARE) 299159240Spjd continue; 300104476Ssam 301159240Spjd /* See if all the algorithms are supported. */ 302159240Spjd for (cr = cri; cr; cr = cr->cri_next) 303159240Spjd if (cap->cc_alg[cr->cri_alg] == 0) 304159240Spjd break; 305159240Spjd if (cr == NULL) { 306159240Spjd /* Ok, all algorithms are supported. */ 307104476Ssam break; 308159240Spjd } 309159240Spjd } 310159240Spjd if (hid == crypto_drivers_num) 311159240Spjd cap = NULL; 312159240Spjd } 313159240Spjd /* 314159240Spjd * If no hardware crypto, look for software crypto. 315159240Spjd */ 316159240Spjd if (cap == NULL && hard <= 0) { 317159240Spjd for (hid = 0; hid < crypto_drivers_num; hid++) { 318159240Spjd cap = &crypto_drivers[hid]; 319104476Ssam /* 320159240Spjd * If it's not initialized or has remaining sessions 321159240Spjd * referencing it, skip. 322104476Ssam */ 323159240Spjd if (cap->cc_newsession == NULL || 324159240Spjd (cap->cc_flags & CRYPTOCAP_F_CLEANUP)) 325159240Spjd continue; 326104476Ssam 327159240Spjd /* Software required -- ignore hardware drivers. */ 328159240Spjd if (!(cap->cc_flags & CRYPTOCAP_F_SOFTWARE)) 329159240Spjd continue; 330159240Spjd 331159240Spjd /* See if all the algorithms are supported. */ 332159240Spjd for (cr = cri; cr; cr = cr->cri_next) 333159240Spjd if (cap->cc_alg[cr->cri_alg] == 0) 334159240Spjd break; 335159240Spjd if (cr == NULL) { 336159240Spjd /* Ok, all algorithms are supported. */ 337159240Spjd break; 338104476Ssam } 339104476Ssam } 340159240Spjd if (hid == crypto_drivers_num) 341159240Spjd cap = NULL; 342104476Ssam } 343159240Spjd 344159240Spjd if (cap != NULL) { 345159240Spjd /* 346159240Spjd * Can't do everything in one session. 347159240Spjd * 348159240Spjd * XXX Fix this. We need to inject a "virtual" session layer right 349159240Spjd * XXX about here. 350159240Spjd */ 351159240Spjd 352159240Spjd /* Call the driver initialization routine. */ 353159240Spjd lid = hid; /* Pass the driver ID. */ 354159240Spjd err = (*cap->cc_newsession)(cap->cc_arg, &lid, cri); 355159240Spjd if (err == 0) { 356159240Spjd /* XXX assert (hid &~ 0xffffff) == 0 */ 357159240Spjd /* XXX assert (cap->cc_flags &~ 0xff) == 0 */ 358159240Spjd (*sid) = ((cap->cc_flags & 0xff) << 24) | hid; 359159240Spjd (*sid) <<= 32; 360159240Spjd (*sid) |= (lid & 0xffffffff); 361159240Spjd cap->cc_sessions++; 362159240Spjd } 363159240Spjd } 364104476Ssamdone: 365104476Ssam CRYPTO_DRIVER_UNLOCK(); 366104476Ssam return err; 367104476Ssam} 368104476Ssam 369158702Spjdstatic void 370158702Spjdcrypto_remove(struct cryptocap *cap) 371158702Spjd{ 372158702Spjd 373158702Spjd mtx_assert(&crypto_drivers_mtx, MA_OWNED); 374158702Spjd if (cap->cc_sessions == 0 && cap->cc_koperations == 0) 375158702Spjd bzero(cap, sizeof(*cap)); 376158702Spjd} 377158702Spjd 378104476Ssam/* 379104476Ssam * Delete an existing session (or a reserved session on an unregistered 380104476Ssam * driver). 381104476Ssam */ 382104476Ssamint 383104476Ssamcrypto_freesession(u_int64_t sid) 384104476Ssam{ 385158702Spjd struct cryptocap *cap; 386104476Ssam u_int32_t hid; 387104476Ssam int err; 388104476Ssam 389104476Ssam CRYPTO_DRIVER_LOCK(); 390104476Ssam 391104476Ssam if (crypto_drivers == NULL) { 392104476Ssam err = EINVAL; 393104476Ssam goto done; 394104476Ssam } 395104476Ssam 396104476Ssam /* Determine two IDs. */ 397116924Ssam hid = CRYPTO_SESID2HID(sid); 398104476Ssam 399104476Ssam if (hid >= crypto_drivers_num) { 400104476Ssam err = ENOENT; 401104476Ssam goto done; 402104476Ssam } 403158702Spjd cap = &crypto_drivers[hid]; 404104476Ssam 405158702Spjd if (cap->cc_sessions) 406158702Spjd cap->cc_sessions--; 407104476Ssam 408104476Ssam /* Call the driver cleanup routine, if available. */ 409158702Spjd if (cap->cc_freesession) 410158702Spjd err = cap->cc_freesession(cap->cc_arg, sid); 411104476Ssam else 412104476Ssam err = 0; 413104476Ssam 414158702Spjd if (cap->cc_flags & CRYPTOCAP_F_CLEANUP) 415158702Spjd crypto_remove(cap); 416104476Ssam 417104476Ssamdone: 418104476Ssam CRYPTO_DRIVER_UNLOCK(); 419104476Ssam return err; 420104476Ssam} 421104476Ssam 422104476Ssam/* 423104476Ssam * Return an unused driver id. Used by drivers prior to registering 424104476Ssam * support for the algorithms they handle. 425104476Ssam */ 426104476Ssamint32_t 427104476Ssamcrypto_get_driverid(u_int32_t flags) 428104476Ssam{ 429104476Ssam struct cryptocap *newdrv; 430104476Ssam int i; 431104476Ssam 432104476Ssam CRYPTO_DRIVER_LOCK(); 433104476Ssam 434158702Spjd for (i = 0; i < crypto_drivers_num; i++) { 435104476Ssam if (crypto_drivers[i].cc_process == NULL && 436158702Spjd (crypto_drivers[i].cc_flags & CRYPTOCAP_F_CLEANUP) == 0) { 437104476Ssam break; 438158702Spjd } 439158702Spjd } 440104476Ssam 441104476Ssam /* Out of entries, allocate some more. */ 442104476Ssam if (i == crypto_drivers_num) { 443104476Ssam /* Be careful about wrap-around. */ 444104476Ssam if (2 * crypto_drivers_num <= crypto_drivers_num) { 445104476Ssam CRYPTO_DRIVER_UNLOCK(); 446104476Ssam printf("crypto: driver count wraparound!\n"); 447104476Ssam return -1; 448104476Ssam } 449104476Ssam 450104476Ssam newdrv = malloc(2 * crypto_drivers_num * 451104476Ssam sizeof(struct cryptocap), M_CRYPTO_DATA, M_NOWAIT|M_ZERO); 452104476Ssam if (newdrv == NULL) { 453104476Ssam CRYPTO_DRIVER_UNLOCK(); 454104476Ssam printf("crypto: no space to expand driver table!\n"); 455104476Ssam return -1; 456104476Ssam } 457104476Ssam 458104476Ssam bcopy(crypto_drivers, newdrv, 459104476Ssam crypto_drivers_num * sizeof(struct cryptocap)); 460104476Ssam 461104476Ssam crypto_drivers_num *= 2; 462104476Ssam 463104476Ssam free(crypto_drivers, M_CRYPTO_DATA); 464104476Ssam crypto_drivers = newdrv; 465104476Ssam } 466104476Ssam 467104476Ssam /* NB: state is zero'd on free */ 468104476Ssam crypto_drivers[i].cc_sessions = 1; /* Mark */ 469104476Ssam crypto_drivers[i].cc_flags = flags; 470104476Ssam if (bootverbose) 471104476Ssam printf("crypto: assign driver %u, flags %u\n", i, flags); 472104476Ssam 473104476Ssam CRYPTO_DRIVER_UNLOCK(); 474104476Ssam 475104476Ssam return i; 476104476Ssam} 477104476Ssam 478104476Ssamstatic struct cryptocap * 479104476Ssamcrypto_checkdriver(u_int32_t hid) 480104476Ssam{ 481104476Ssam if (crypto_drivers == NULL) 482104476Ssam return NULL; 483104476Ssam return (hid >= crypto_drivers_num ? NULL : &crypto_drivers[hid]); 484104476Ssam} 485104476Ssam 486104476Ssam/* 487104476Ssam * Register support for a key-related algorithm. This routine 488104476Ssam * is called once for each algorithm supported a driver. 489104476Ssam */ 490104476Ssamint 491104476Ssamcrypto_kregister(u_int32_t driverid, int kalg, u_int32_t flags, 492104476Ssam int (*kprocess)(void*, struct cryptkop *, int), 493104476Ssam void *karg) 494104476Ssam{ 495104476Ssam struct cryptocap *cap; 496104476Ssam int err; 497104476Ssam 498104476Ssam CRYPTO_DRIVER_LOCK(); 499104476Ssam 500104476Ssam cap = crypto_checkdriver(driverid); 501104476Ssam if (cap != NULL && 502104476Ssam (CRK_ALGORITM_MIN <= kalg && kalg <= CRK_ALGORITHM_MAX)) { 503104476Ssam /* 504104476Ssam * XXX Do some performance testing to determine placing. 505104476Ssam * XXX We probably need an auxiliary data structure that 506104476Ssam * XXX describes relative performances. 507104476Ssam */ 508104476Ssam 509104476Ssam cap->cc_kalg[kalg] = flags | CRYPTO_ALG_FLAG_SUPPORTED; 510104476Ssam if (bootverbose) 511104476Ssam printf("crypto: driver %u registers key alg %u flags %u\n" 512104476Ssam , driverid 513104476Ssam , kalg 514104476Ssam , flags 515104476Ssam ); 516104476Ssam 517104476Ssam if (cap->cc_kprocess == NULL) { 518104476Ssam cap->cc_karg = karg; 519104476Ssam cap->cc_kprocess = kprocess; 520104476Ssam } 521104476Ssam err = 0; 522104476Ssam } else 523104476Ssam err = EINVAL; 524104476Ssam 525104476Ssam CRYPTO_DRIVER_UNLOCK(); 526104476Ssam return err; 527104476Ssam} 528104476Ssam 529104476Ssam/* 530104476Ssam * Register support for a non-key-related algorithm. This routine 531104476Ssam * is called once for each such algorithm supported by a driver. 532104476Ssam */ 533104476Ssamint 534104476Ssamcrypto_register(u_int32_t driverid, int alg, u_int16_t maxoplen, 535104476Ssam u_int32_t flags, 536104476Ssam int (*newses)(void*, u_int32_t*, struct cryptoini*), 537104476Ssam int (*freeses)(void*, u_int64_t), 538104476Ssam int (*process)(void*, struct cryptop *, int), 539104476Ssam void *arg) 540104476Ssam{ 541104476Ssam struct cryptocap *cap; 542104476Ssam int err; 543104476Ssam 544104476Ssam CRYPTO_DRIVER_LOCK(); 545104476Ssam 546104476Ssam cap = crypto_checkdriver(driverid); 547104476Ssam /* NB: algorithms are in the range [1..max] */ 548104476Ssam if (cap != NULL && 549104476Ssam (CRYPTO_ALGORITHM_MIN <= alg && alg <= CRYPTO_ALGORITHM_MAX)) { 550104476Ssam /* 551104476Ssam * XXX Do some performance testing to determine placing. 552104476Ssam * XXX We probably need an auxiliary data structure that 553104476Ssam * XXX describes relative performances. 554104476Ssam */ 555104476Ssam 556104476Ssam cap->cc_alg[alg] = flags | CRYPTO_ALG_FLAG_SUPPORTED; 557104476Ssam cap->cc_max_op_len[alg] = maxoplen; 558104476Ssam if (bootverbose) 559104476Ssam printf("crypto: driver %u registers alg %u flags %u maxoplen %u\n" 560104476Ssam , driverid 561104476Ssam , alg 562104476Ssam , flags 563104476Ssam , maxoplen 564104476Ssam ); 565104476Ssam 566104476Ssam if (cap->cc_process == NULL) { 567104476Ssam cap->cc_arg = arg; 568104476Ssam cap->cc_newsession = newses; 569104476Ssam cap->cc_process = process; 570104476Ssam cap->cc_freesession = freeses; 571104476Ssam cap->cc_sessions = 0; /* Unmark */ 572104476Ssam } 573104476Ssam err = 0; 574104476Ssam } else 575104476Ssam err = EINVAL; 576104476Ssam 577104476Ssam CRYPTO_DRIVER_UNLOCK(); 578104476Ssam return err; 579104476Ssam} 580104476Ssam 581104476Ssam/* 582104476Ssam * Unregister a crypto driver. If there are pending sessions using it, 583104476Ssam * leave enough information around so that subsequent calls using those 584104476Ssam * sessions will correctly detect the driver has been unregistered and 585104476Ssam * reroute requests. 586104476Ssam */ 587104476Ssamint 588104476Ssamcrypto_unregister(u_int32_t driverid, int alg) 589104476Ssam{ 590158702Spjd struct cryptocap *cap; 591158702Spjd u_int32_t ses, kops; 592104476Ssam int i, err; 593104476Ssam 594104476Ssam CRYPTO_DRIVER_LOCK(); 595104476Ssam 596104476Ssam cap = crypto_checkdriver(driverid); 597104476Ssam if (cap != NULL && 598104476Ssam (CRYPTO_ALGORITHM_MIN <= alg && alg <= CRYPTO_ALGORITHM_MAX) && 599104476Ssam cap->cc_alg[alg] != 0) { 600104476Ssam cap->cc_alg[alg] = 0; 601104476Ssam cap->cc_max_op_len[alg] = 0; 602104476Ssam 603104476Ssam /* Was this the last algorithm ? */ 604104476Ssam for (i = 1; i <= CRYPTO_ALGORITHM_MAX; i++) 605104476Ssam if (cap->cc_alg[i] != 0) 606104476Ssam break; 607104476Ssam 608104476Ssam if (i == CRYPTO_ALGORITHM_MAX + 1) { 609104476Ssam ses = cap->cc_sessions; 610158702Spjd kops = cap->cc_koperations; 611158702Spjd bzero(cap, sizeof(*cap)); 612158702Spjd if (ses != 0 || kops != 0) { 613104476Ssam /* 614104476Ssam * If there are pending sessions, just mark as invalid. 615104476Ssam */ 616104476Ssam cap->cc_flags |= CRYPTOCAP_F_CLEANUP; 617104476Ssam cap->cc_sessions = ses; 618158702Spjd cap->cc_koperations = kops; 619104476Ssam } 620104476Ssam } 621104476Ssam err = 0; 622104476Ssam } else 623104476Ssam err = EINVAL; 624104476Ssam 625104476Ssam CRYPTO_DRIVER_UNLOCK(); 626104476Ssam return err; 627104476Ssam} 628104476Ssam 629104476Ssam/* 630104476Ssam * Unregister all algorithms associated with a crypto driver. 631104476Ssam * If there are pending sessions using it, leave enough information 632104476Ssam * around so that subsequent calls using those sessions will 633104476Ssam * correctly detect the driver has been unregistered and reroute 634104476Ssam * requests. 635104476Ssam */ 636104476Ssamint 637104476Ssamcrypto_unregister_all(u_int32_t driverid) 638104476Ssam{ 639158702Spjd struct cryptocap *cap; 640158702Spjd u_int32_t ses, kops; 641104476Ssam int i, err; 642104476Ssam 643104476Ssam CRYPTO_DRIVER_LOCK(); 644104476Ssam 645104476Ssam cap = crypto_checkdriver(driverid); 646104476Ssam if (cap != NULL) { 647104476Ssam for (i = CRYPTO_ALGORITHM_MIN; i <= CRYPTO_ALGORITHM_MAX; i++) { 648104476Ssam cap->cc_alg[i] = 0; 649104476Ssam cap->cc_max_op_len[i] = 0; 650104476Ssam } 651104476Ssam ses = cap->cc_sessions; 652158702Spjd kops = cap->cc_koperations; 653158702Spjd bzero(cap, sizeof(*cap)); 654158702Spjd if (ses != 0 || kops != 0) { 655104476Ssam /* 656104476Ssam * If there are pending sessions, just mark as invalid. 657104476Ssam */ 658104476Ssam cap->cc_flags |= CRYPTOCAP_F_CLEANUP; 659104476Ssam cap->cc_sessions = ses; 660158702Spjd cap->cc_koperations = kops; 661104476Ssam } 662104476Ssam err = 0; 663104476Ssam } else 664104476Ssam err = EINVAL; 665104476Ssam 666104476Ssam CRYPTO_DRIVER_UNLOCK(); 667104476Ssam return err; 668104476Ssam} 669104476Ssam 670104476Ssam/* 671104476Ssam * Clear blockage on a driver. The what parameter indicates whether 672104476Ssam * the driver is now ready for cryptop's and/or cryptokop's. 673104476Ssam */ 674104476Ssamint 675104476Ssamcrypto_unblock(u_int32_t driverid, int what) 676104476Ssam{ 677104476Ssam struct cryptocap *cap; 678158827Spjd int err; 679104476Ssam 680104476Ssam CRYPTO_Q_LOCK(); 681104476Ssam cap = crypto_checkdriver(driverid); 682104476Ssam if (cap != NULL) { 683158827Spjd if (what & CRYPTO_SYMQ) 684104476Ssam cap->cc_qblocked = 0; 685158827Spjd if (what & CRYPTO_ASYMQ) 686104476Ssam cap->cc_kqblocked = 0; 687158827Spjd if (crp_sleep) 688104628Ssam wakeup_one(&crp_q); 689104476Ssam err = 0; 690104476Ssam } else 691104476Ssam err = EINVAL; 692104476Ssam CRYPTO_Q_UNLOCK(); 693104476Ssam 694104476Ssam return err; 695104476Ssam} 696104476Ssam 697104476Ssam/* 698104476Ssam * Add a crypto request to a queue, to be processed by the kernel thread. 699104476Ssam */ 700104476Ssamint 701104476Ssamcrypto_dispatch(struct cryptop *crp) 702104476Ssam{ 703158702Spjd struct cryptocap *cap; 704158702Spjd u_int32_t hid; 705158702Spjd int result; 706104476Ssam 707108587Ssam cryptostats.cs_ops++; 708108587Ssam 709108587Ssam#ifdef CRYPTO_TIMING 710108587Ssam if (crypto_timing) 711108587Ssam binuptime(&crp->crp_tstamp); 712108587Ssam#endif 713108587Ssam 714158702Spjd hid = CRYPTO_SESID2HID(crp->crp_sid); 715158702Spjd 716111297Ssam if ((crp->crp_flags & CRYPTO_F_BATCH) == 0) { 717111297Ssam /* 718111297Ssam * Caller marked the request to be processed 719111297Ssam * immediately; dispatch it directly to the 720111297Ssam * driver unless the driver is currently blocked. 721111297Ssam */ 722111297Ssam cap = crypto_checkdriver(hid); 723158702Spjd /* Driver cannot disappeared when there is an active session. */ 724158702Spjd KASSERT(cap != NULL, ("%s: Driver disappeared.", __func__)); 725158702Spjd if (!cap->cc_qblocked) { 726158702Spjd result = crypto_invoke(cap, crp, 0); 727158702Spjd if (result != ERESTART) 728158702Spjd return (result); 729158823Spjd /* 730158823Spjd * The driver ran out of resources, put the request on 731158823Spjd * the queue. 732158823Spjd */ 733108990Ssam } 734108990Ssam } 735158702Spjd CRYPTO_Q_LOCK(); 736158827Spjd TAILQ_INSERT_TAIL(&crp_q, crp, crp_next); 737158827Spjd if (crp_sleep) 738157665Spjd wakeup_one(&crp_q); 739115746Ssam CRYPTO_Q_UNLOCK(); 740158702Spjd return 0; 741104476Ssam} 742104476Ssam 743104476Ssam/* 744104476Ssam * Add an asymetric crypto request to a queue, 745104476Ssam * to be processed by the kernel thread. 746104476Ssam */ 747104476Ssamint 748104476Ssamcrypto_kdispatch(struct cryptkop *krp) 749104476Ssam{ 750158702Spjd int result; 751104476Ssam 752108587Ssam cryptostats.cs_kops++; 753108587Ssam 754158702Spjd result = crypto_kinvoke(krp); 755158702Spjd if (result != ERESTART) 756158702Spjd return (result); 757104476Ssam CRYPTO_Q_LOCK(); 758158827Spjd TAILQ_INSERT_TAIL(&crp_kq, krp, krp_next); 759158827Spjd if (crp_sleep) 760157665Spjd wakeup_one(&crp_q); 761104476Ssam CRYPTO_Q_UNLOCK(); 762104476Ssam 763158702Spjd return 0; 764104476Ssam} 765104476Ssam 766104476Ssam/* 767104476Ssam * Dispatch an assymetric crypto request to the appropriate crypto devices. 768104476Ssam */ 769104476Ssamstatic int 770158702Spjdcrypto_kinvoke(struct cryptkop *krp) 771104476Ssam{ 772158702Spjd struct cryptocap *cap = NULL; 773104476Ssam u_int32_t hid; 774158702Spjd int error = 0; 775104476Ssam 776158702Spjd KASSERT(krp != NULL, ("%s: krp == NULL", __func__)); 777158702Spjd KASSERT(krp->krp_callback != NULL, 778158702Spjd ("%s: krp->crp_callback == NULL", __func__)); 779104476Ssam 780158702Spjd CRYPTO_DRIVER_LOCK(); 781104476Ssam for (hid = 0; hid < crypto_drivers_num; hid++) { 782158702Spjd cap = &crypto_drivers[hid]; 783158702Spjd if (cap == NULL) 784104476Ssam continue; 785158702Spjd if ((cap->cc_flags & CRYPTOCAP_F_SOFTWARE) && 786158702Spjd !crypto_devallowsoft) { 787104476Ssam continue; 788158702Spjd } 789158702Spjd if (cap->cc_kprocess == NULL) 790104476Ssam continue; 791158702Spjd if (!(cap->cc_kalg[krp->krp_op] & CRYPTO_ALG_FLAG_SUPPORTED)) 792158702Spjd continue; 793158702Spjd if (cap->cc_kqblocked) { 794158702Spjd error = ERESTART; 795158702Spjd continue; 796158702Spjd } 797158702Spjd error = 0; 798104476Ssam break; 799104476Ssam } 800158702Spjd krp->krp_hid = hid; 801104476Ssam if (hid < crypto_drivers_num) { 802158702Spjd cap->cc_koperations++; 803158702Spjd CRYPTO_DRIVER_UNLOCK(); 804158702Spjd error = cap->cc_kprocess(cap->cc_karg, krp, 0); 805158702Spjd CRYPTO_DRIVER_LOCK(); 806158702Spjd if (error == ERESTART) { 807158702Spjd cap->cc_koperations--; 808158702Spjd CRYPTO_DRIVER_UNLOCK(); 809158702Spjd return (error); 810158702Spjd } 811158702Spjd } else { 812104476Ssam error = ENODEV; 813158702Spjd } 814158702Spjd CRYPTO_DRIVER_UNLOCK(); 815104476Ssam 816104476Ssam if (error) { 817104476Ssam krp->krp_status = error; 818104628Ssam crypto_kdone(krp); 819104476Ssam } 820104476Ssam return 0; 821104476Ssam} 822104476Ssam 823108587Ssam#ifdef CRYPTO_TIMING 824108587Ssamstatic void 825108587Ssamcrypto_tstat(struct cryptotstat *ts, struct bintime *bt) 826108587Ssam{ 827108587Ssam struct bintime now, delta; 828108587Ssam struct timespec t; 829108587Ssam uint64_t u; 830108587Ssam 831108587Ssam binuptime(&now); 832108587Ssam u = now.frac; 833108587Ssam delta.frac = now.frac - bt->frac; 834108587Ssam delta.sec = now.sec - bt->sec; 835108587Ssam if (u < delta.frac) 836108587Ssam delta.sec--; 837108587Ssam bintime2timespec(&delta, &t); 838108587Ssam timespecadd(&ts->acc, &t); 839108587Ssam if (timespeccmp(&t, &ts->min, <)) 840108587Ssam ts->min = t; 841108587Ssam if (timespeccmp(&t, &ts->max, >)) 842108587Ssam ts->max = t; 843108587Ssam ts->count++; 844108587Ssam 845108587Ssam *bt = now; 846108587Ssam} 847108587Ssam#endif 848108587Ssam 849104476Ssam/* 850104476Ssam * Dispatch a crypto request to the appropriate crypto devices. 851104476Ssam */ 852104476Ssamstatic int 853158702Spjdcrypto_invoke(struct cryptocap *cap, struct cryptop *crp, int hint) 854104476Ssam{ 855104476Ssam 856158702Spjd KASSERT(crp != NULL, ("%s: crp == NULL", __func__)); 857158702Spjd KASSERT(crp->crp_callback != NULL, 858158702Spjd ("%s: crp->crp_callback == NULL", __func__)); 859158702Spjd KASSERT(crp->crp_desc != NULL, ("%s: crp->crp_desc == NULL", __func__)); 860158702Spjd 861108587Ssam#ifdef CRYPTO_TIMING 862108587Ssam if (crypto_timing) 863108587Ssam crypto_tstat(&cryptostats.cs_invoke, &crp->crp_tstamp); 864108587Ssam#endif 865158702Spjd if (cap->cc_flags & CRYPTOCAP_F_CLEANUP) { 866104476Ssam struct cryptodesc *crd; 867104476Ssam u_int64_t nid; 868104476Ssam 869104476Ssam /* 870104476Ssam * Driver has unregistered; migrate the session and return 871104476Ssam * an error to the caller so they'll resubmit the op. 872158702Spjd * 873158702Spjd * XXX: What if there are more already queued requests for this 874158702Spjd * session? 875104476Ssam */ 876158702Spjd crypto_freesession(crp->crp_sid); 877158702Spjd 878104476Ssam for (crd = crp->crp_desc; crd->crd_next; crd = crd->crd_next) 879104476Ssam crd->CRD_INI.cri_next = &(crd->crd_next->CRD_INI); 880104476Ssam 881104476Ssam if (crypto_newsession(&nid, &(crp->crp_desc->CRD_INI), 0) == 0) 882104476Ssam crp->crp_sid = nid; 883104476Ssam 884104476Ssam crp->crp_etype = EAGAIN; 885104628Ssam crypto_done(crp); 886104476Ssam return 0; 887104476Ssam } else { 888104476Ssam /* 889104476Ssam * Invoke the driver to process the request. 890104476Ssam */ 891158702Spjd return cap->cc_process(cap->cc_arg, crp, hint); 892104476Ssam } 893104476Ssam} 894104476Ssam 895104476Ssam/* 896104476Ssam * Release a set of crypto descriptors. 897104476Ssam */ 898104476Ssamvoid 899104476Ssamcrypto_freereq(struct cryptop *crp) 900104476Ssam{ 901104476Ssam struct cryptodesc *crd; 902104476Ssam 903104476Ssam if (crp == NULL) 904104476Ssam return; 905104476Ssam 906104476Ssam while ((crd = crp->crp_desc) != NULL) { 907104476Ssam crp->crp_desc = crd->crd_next; 908104476Ssam uma_zfree(cryptodesc_zone, crd); 909104476Ssam } 910104476Ssam 911104476Ssam uma_zfree(cryptop_zone, crp); 912104476Ssam} 913104476Ssam 914104476Ssam/* 915104476Ssam * Acquire a set of crypto descriptors. 916104476Ssam */ 917104476Ssamstruct cryptop * 918104476Ssamcrypto_getreq(int num) 919104476Ssam{ 920104476Ssam struct cryptodesc *crd; 921104476Ssam struct cryptop *crp; 922104476Ssam 923108813Ssam crp = uma_zalloc(cryptop_zone, M_NOWAIT|M_ZERO); 924104476Ssam if (crp != NULL) { 925104476Ssam while (num--) { 926108813Ssam crd = uma_zalloc(cryptodesc_zone, M_NOWAIT|M_ZERO); 927104476Ssam if (crd == NULL) { 928104476Ssam crypto_freereq(crp); 929104476Ssam return NULL; 930104476Ssam } 931104476Ssam 932104476Ssam crd->crd_next = crp->crp_desc; 933104476Ssam crp->crp_desc = crd; 934104476Ssam } 935104476Ssam } 936104476Ssam return crp; 937104476Ssam} 938104476Ssam 939104476Ssam/* 940104476Ssam * Invoke the callback on behalf of the driver. 941104476Ssam */ 942104476Ssamvoid 943104476Ssamcrypto_done(struct cryptop *crp) 944104476Ssam{ 945115746Ssam KASSERT((crp->crp_flags & CRYPTO_F_DONE) == 0, 946115746Ssam ("crypto_done: op already done, flags 0x%x", crp->crp_flags)); 947115746Ssam crp->crp_flags |= CRYPTO_F_DONE; 948108587Ssam if (crp->crp_etype != 0) 949108587Ssam cryptostats.cs_errs++; 950108587Ssam#ifdef CRYPTO_TIMING 951108587Ssam if (crypto_timing) 952108587Ssam crypto_tstat(&cryptostats.cs_done, &crp->crp_tstamp); 953108587Ssam#endif 954117058Ssam /* 955117058Ssam * CBIMM means unconditionally do the callback immediately; 956117058Ssam * CBIFSYNC means do the callback immediately only if the 957117058Ssam * operation was done synchronously. Both are used to avoid 958117058Ssam * doing extraneous context switches; the latter is mostly 959117058Ssam * used with the software crypto driver. 960117058Ssam */ 961117058Ssam if ((crp->crp_flags & CRYPTO_F_CBIMM) || 962117058Ssam ((crp->crp_flags & CRYPTO_F_CBIFSYNC) && 963117058Ssam (CRYPTO_SESID2CAPS(crp->crp_sid) & CRYPTOCAP_F_SYNC))) { 964111297Ssam /* 965111297Ssam * Do the callback directly. This is ok when the 966111297Ssam * callback routine does very little (e.g. the 967111297Ssam * /dev/crypto callback method just does a wakeup). 968111297Ssam */ 969111297Ssam#ifdef CRYPTO_TIMING 970111297Ssam if (crypto_timing) { 971111297Ssam /* 972111297Ssam * NB: We must copy the timestamp before 973111297Ssam * doing the callback as the cryptop is 974111297Ssam * likely to be reclaimed. 975111297Ssam */ 976111297Ssam struct bintime t = crp->crp_tstamp; 977111297Ssam crypto_tstat(&cryptostats.cs_cb, &t); 978111297Ssam crp->crp_callback(crp); 979111297Ssam crypto_tstat(&cryptostats.cs_finis, &t); 980111297Ssam } else 981111297Ssam#endif 982111297Ssam crp->crp_callback(crp); 983111297Ssam } else { 984111297Ssam /* 985111297Ssam * Normal case; queue the callback for the thread. 986111297Ssam */ 987111297Ssam CRYPTO_RETQ_LOCK(); 988158826Spjd if (CRYPTO_RETQ_EMPTY()) 989158702Spjd wakeup_one(&crp_ret_q); /* shared wait channel */ 990111297Ssam TAILQ_INSERT_TAIL(&crp_ret_q, crp, crp_next); 991111297Ssam CRYPTO_RETQ_UNLOCK(); 992111297Ssam } 993104476Ssam} 994104476Ssam 995104476Ssam/* 996104476Ssam * Invoke the callback on behalf of the driver. 997104476Ssam */ 998104476Ssamvoid 999104476Ssamcrypto_kdone(struct cryptkop *krp) 1000104476Ssam{ 1001158702Spjd struct cryptocap *cap; 1002104476Ssam 1003108587Ssam if (krp->krp_status != 0) 1004108587Ssam cryptostats.cs_kerrs++; 1005158702Spjd CRYPTO_DRIVER_LOCK(); 1006158702Spjd /* XXX: What if driver is loaded in the meantime? */ 1007158702Spjd if (krp->krp_hid < crypto_drivers_num) { 1008158702Spjd cap = &crypto_drivers[krp->krp_hid]; 1009158702Spjd cap->cc_koperations--; 1010158702Spjd KASSERT(cap->cc_koperations >= 0, ("cc_koperations < 0")); 1011158702Spjd if (cap->cc_flags & CRYPTOCAP_F_CLEANUP) 1012158702Spjd crypto_remove(cap); 1013158702Spjd } 1014158702Spjd CRYPTO_DRIVER_UNLOCK(); 1015104476Ssam CRYPTO_RETQ_LOCK(); 1016158826Spjd if (CRYPTO_RETQ_EMPTY()) 1017158702Spjd wakeup_one(&crp_ret_q); /* shared wait channel */ 1018104476Ssam TAILQ_INSERT_TAIL(&crp_ret_kq, krp, krp_next); 1019104628Ssam CRYPTO_RETQ_UNLOCK(); 1020104476Ssam} 1021104476Ssam 1022104476Ssamint 1023104476Ssamcrypto_getfeat(int *featp) 1024104476Ssam{ 1025104476Ssam int hid, kalg, feat = 0; 1026104476Ssam 1027104476Ssam if (!crypto_userasymcrypto) 1028104476Ssam goto out; 1029104476Ssam 1030104476Ssam CRYPTO_DRIVER_LOCK(); 1031104476Ssam for (hid = 0; hid < crypto_drivers_num; hid++) { 1032104476Ssam if ((crypto_drivers[hid].cc_flags & CRYPTOCAP_F_SOFTWARE) && 1033104476Ssam !crypto_devallowsoft) { 1034104476Ssam continue; 1035104476Ssam } 1036104476Ssam if (crypto_drivers[hid].cc_kprocess == NULL) 1037104476Ssam continue; 1038104476Ssam for (kalg = 0; kalg < CRK_ALGORITHM_MAX; kalg++) 1039104476Ssam if ((crypto_drivers[hid].cc_kalg[kalg] & 1040104476Ssam CRYPTO_ALG_FLAG_SUPPORTED) != 0) 1041104476Ssam feat |= 1 << kalg; 1042104476Ssam } 1043104476Ssam CRYPTO_DRIVER_UNLOCK(); 1044104476Ssamout: 1045104476Ssam *featp = feat; 1046104476Ssam return (0); 1047104476Ssam} 1048104476Ssam 1049108588Ssam/* 1050108588Ssam * Terminate a thread at module unload. The process that 1051108588Ssam * initiated this is waiting for us to signal that we're gone; 1052108588Ssam * wake it up and exit. We use the driver table lock to insure 1053108588Ssam * we don't do the wakeup before they're waiting. There is no 1054108588Ssam * race here because the waiter sleeps on the proc lock for the 1055108588Ssam * thread so it gets notified at the right time because of an 1056108588Ssam * extra wakeup that's done in exit1(). 1057108588Ssam */ 1058104476Ssamstatic void 1059108588Ssamcrypto_finis(void *chan) 1060104476Ssam{ 1061108588Ssam CRYPTO_DRIVER_LOCK(); 1062108588Ssam wakeup_one(chan); 1063108588Ssam CRYPTO_DRIVER_UNLOCK(); 1064108588Ssam kthread_exit(0); 1065104476Ssam} 1066104476Ssam 1067104476Ssam/* 1068104628Ssam * Crypto thread, dispatches crypto requests. 1069104476Ssam */ 1070104476Ssamstatic void 1071104476Ssamcrypto_proc(void) 1072104476Ssam{ 1073104628Ssam struct cryptop *crp, *submit; 1074104628Ssam struct cryptkop *krp; 1075104476Ssam struct cryptocap *cap; 1076158702Spjd u_int32_t hid; 1077104476Ssam int result, hint; 1078104476Ssam 1079104628Ssam CRYPTO_Q_LOCK(); 1080104476Ssam for (;;) { 1081104476Ssam /* 1082104476Ssam * Find the first element in the queue that can be 1083104476Ssam * processed and look-ahead to see if multiple ops 1084104476Ssam * are ready for the same driver. 1085104476Ssam */ 1086104476Ssam submit = NULL; 1087104476Ssam hint = 0; 1088104476Ssam TAILQ_FOREACH(crp, &crp_q, crp_next) { 1089158702Spjd hid = CRYPTO_SESID2HID(crp->crp_sid); 1090104476Ssam cap = crypto_checkdriver(hid); 1091158702Spjd /* 1092158702Spjd * Driver cannot disappeared when there is an active 1093158702Spjd * session. 1094158702Spjd */ 1095158716Spjd KASSERT(cap != NULL, ("%s:%u Driver disappeared.", 1096158716Spjd __func__, __LINE__)); 1097104476Ssam if (cap == NULL || cap->cc_process == NULL) { 1098104476Ssam /* Op needs to be migrated, process it. */ 1099104476Ssam if (submit == NULL) 1100104476Ssam submit = crp; 1101104476Ssam break; 1102104476Ssam } 1103104476Ssam if (!cap->cc_qblocked) { 1104104476Ssam if (submit != NULL) { 1105104476Ssam /* 1106104476Ssam * We stop on finding another op, 1107104476Ssam * regardless whether its for the same 1108104476Ssam * driver or not. We could keep 1109104476Ssam * searching the queue but it might be 1110104476Ssam * better to just use a per-driver 1111104476Ssam * queue instead. 1112104476Ssam */ 1113116924Ssam if (CRYPTO_SESID2HID(submit->crp_sid) == hid) 1114104476Ssam hint = CRYPTO_HINT_MORE; 1115104476Ssam break; 1116104476Ssam } else { 1117104476Ssam submit = crp; 1118111297Ssam if ((submit->crp_flags & CRYPTO_F_BATCH) == 0) 1119104476Ssam break; 1120104476Ssam /* keep scanning for more are q'd */ 1121104476Ssam } 1122104476Ssam } 1123104476Ssam } 1124104476Ssam if (submit != NULL) { 1125104476Ssam TAILQ_REMOVE(&crp_q, submit, crp_next); 1126158702Spjd hid = CRYPTO_SESID2HID(submit->crp_sid); 1127158702Spjd cap = crypto_checkdriver(hid); 1128158716Spjd KASSERT(cap != NULL, ("%s:%u Driver disappeared.", 1129158716Spjd __func__, __LINE__)); 1130158702Spjd result = crypto_invoke(cap, submit, hint); 1131104476Ssam if (result == ERESTART) { 1132104476Ssam /* 1133104476Ssam * The driver ran out of resources, mark the 1134104476Ssam * driver ``blocked'' for cryptop's and put 1135104476Ssam * the request back in the queue. It would 1136104476Ssam * best to put the request back where we got 1137104476Ssam * it but that's hard so for now we put it 1138104476Ssam * at the front. This should be ok; putting 1139104476Ssam * it at the end does not work. 1140104476Ssam */ 1141104476Ssam /* XXX validate sid again? */ 1142116924Ssam crypto_drivers[CRYPTO_SESID2HID(submit->crp_sid)].cc_qblocked = 1; 1143104476Ssam TAILQ_INSERT_HEAD(&crp_q, submit, crp_next); 1144108587Ssam cryptostats.cs_blocks++; 1145104476Ssam } 1146104476Ssam } 1147104476Ssam 1148104476Ssam /* As above, but for key ops */ 1149104476Ssam TAILQ_FOREACH(krp, &crp_kq, krp_next) { 1150104476Ssam cap = crypto_checkdriver(krp->krp_hid); 1151104476Ssam if (cap == NULL || cap->cc_kprocess == NULL) { 1152104476Ssam /* Op needs to be migrated, process it. */ 1153104476Ssam break; 1154104476Ssam } 1155104476Ssam if (!cap->cc_kqblocked) 1156104476Ssam break; 1157104476Ssam } 1158104476Ssam if (krp != NULL) { 1159104476Ssam TAILQ_REMOVE(&crp_kq, krp, krp_next); 1160158702Spjd result = crypto_kinvoke(krp); 1161104476Ssam if (result == ERESTART) { 1162104476Ssam /* 1163104476Ssam * The driver ran out of resources, mark the 1164104476Ssam * driver ``blocked'' for cryptkop's and put 1165104476Ssam * the request back in the queue. It would 1166104476Ssam * best to put the request back where we got 1167104476Ssam * it but that's hard so for now we put it 1168104476Ssam * at the front. This should be ok; putting 1169104476Ssam * it at the end does not work. 1170104476Ssam */ 1171104476Ssam /* XXX validate sid again? */ 1172104476Ssam crypto_drivers[krp->krp_hid].cc_kqblocked = 1; 1173104476Ssam TAILQ_INSERT_HEAD(&crp_kq, krp, krp_next); 1174108587Ssam cryptostats.cs_kblocks++; 1175104476Ssam } 1176104476Ssam } 1177104476Ssam 1178104628Ssam if (submit == NULL && krp == NULL) { 1179104476Ssam /* 1180104476Ssam * Nothing more to be processed. Sleep until we're 1181104476Ssam * woken because there are more ops to process. 1182104476Ssam * This happens either by submission or by a driver 1183104476Ssam * becoming unblocked and notifying us through 1184104476Ssam * crypto_unblock. Note that when we wakeup we 1185104476Ssam * start processing each queue again from the 1186104476Ssam * front. It's not clear that it's important to 1187104476Ssam * preserve this ordering since ops may finish 1188104476Ssam * out of order if dispatched to different devices 1189104476Ssam * and some become blocked while others do not. 1190104476Ssam */ 1191158827Spjd crp_sleep = 1; 1192104628Ssam msleep(&crp_q, &crypto_q_mtx, PWAIT, "crypto_wait", 0); 1193158827Spjd crp_sleep = 0; 1194108588Ssam if (cryptoproc == NULL) 1195108588Ssam break; 1196108587Ssam cryptostats.cs_intrs++; 1197104476Ssam } 1198104476Ssam } 1199108588Ssam CRYPTO_Q_UNLOCK(); 1200104628Ssam 1201108588Ssam crypto_finis(&crp_q); 1202104628Ssam} 1203104628Ssam 1204104628Ssam/* 1205104628Ssam * Crypto returns thread, does callbacks for processed crypto requests. 1206104628Ssam * Callbacks are done here, rather than in the crypto drivers, because 1207104628Ssam * callbacks typically are expensive and would slow interrupt handling. 1208104628Ssam */ 1209104628Ssamstatic void 1210104628Ssamcrypto_ret_proc(void) 1211104628Ssam{ 1212104628Ssam struct cryptop *crpt; 1213104628Ssam struct cryptkop *krpt; 1214104628Ssam 1215104628Ssam CRYPTO_RETQ_LOCK(); 1216104628Ssam for (;;) { 1217104628Ssam /* Harvest return q's for completed ops */ 1218104628Ssam crpt = TAILQ_FIRST(&crp_ret_q); 1219104628Ssam if (crpt != NULL) 1220104628Ssam TAILQ_REMOVE(&crp_ret_q, crpt, crp_next); 1221104628Ssam 1222104628Ssam krpt = TAILQ_FIRST(&crp_ret_kq); 1223104628Ssam if (krpt != NULL) 1224104628Ssam TAILQ_REMOVE(&crp_ret_kq, krpt, krp_next); 1225104628Ssam 1226104628Ssam if (crpt != NULL || krpt != NULL) { 1227104628Ssam CRYPTO_RETQ_UNLOCK(); 1228104628Ssam /* 1229104628Ssam * Run callbacks unlocked. 1230104628Ssam */ 1231108587Ssam if (crpt != NULL) { 1232108587Ssam#ifdef CRYPTO_TIMING 1233108587Ssam if (crypto_timing) { 1234108587Ssam /* 1235108587Ssam * NB: We must copy the timestamp before 1236108587Ssam * doing the callback as the cryptop is 1237108587Ssam * likely to be reclaimed. 1238108587Ssam */ 1239108587Ssam struct bintime t = crpt->crp_tstamp; 1240108587Ssam crypto_tstat(&cryptostats.cs_cb, &t); 1241108587Ssam crpt->crp_callback(crpt); 1242108587Ssam crypto_tstat(&cryptostats.cs_finis, &t); 1243108587Ssam } else 1244108587Ssam#endif 1245108587Ssam crpt->crp_callback(crpt); 1246108587Ssam } 1247104628Ssam if (krpt != NULL) 1248104628Ssam krpt->krp_callback(krpt); 1249104628Ssam CRYPTO_RETQ_LOCK(); 1250104628Ssam } else { 1251104628Ssam /* 1252104628Ssam * Nothing more to be processed. Sleep until we're 1253104628Ssam * woken because there are more returns to process. 1254104628Ssam */ 1255104628Ssam msleep(&crp_ret_q, &crypto_ret_q_mtx, PWAIT, 1256104628Ssam "crypto_ret_wait", 0); 1257108588Ssam if (cryptoretproc == NULL) 1258108588Ssam break; 1259108587Ssam cryptostats.cs_rets++; 1260104628Ssam } 1261104628Ssam } 1262108588Ssam CRYPTO_RETQ_UNLOCK(); 1263108588Ssam 1264108588Ssam crypto_finis(&crp_ret_q); 1265104628Ssam} 1266