1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. 23 */ 24 25 #ifndef _SYS_CRYPTO_SCHED_IMPL_H 26 #define _SYS_CRYPTO_SCHED_IMPL_H 27 28 /* 29 * Scheduler internal structures. 30 */ 31 32 #ifdef __cplusplus 33 extern "C" { 34 #endif 35 36 #include <sys/types.h> 37 #include <sys/mutex.h> 38 #include <sys/condvar.h> 39 #include <sys/door.h> 40 #include <sys/crypto/api.h> 41 #include <sys/crypto/spi.h> 42 #include <sys/crypto/impl.h> 43 #include <sys/crypto/common.h> 44 #include <sys/crypto/ops_impl.h> 45 46 typedef void (kcf_func_t)(void *, int); 47 48 typedef enum kcf_req_status { 49 REQ_ALLOCATED = 1, 50 REQ_WAITING, /* At the framework level */ 51 REQ_INPROGRESS, /* At the provider level */ 52 REQ_DONE, 53 REQ_CANCELED 54 } kcf_req_status_t; 55 56 typedef enum kcf_call_type { 57 CRYPTO_SYNCH = 1, 58 CRYPTO_ASYNCH 59 } kcf_call_type_t; 60 61 #define CHECK_FASTPATH(crq, pd) ((crq) == NULL || \ 62 !((crq)->cr_flag & CRYPTO_ALWAYS_QUEUE)) && \ 63 (pd)->pd_prov_type == CRYPTO_SW_PROVIDER 64 65 #define KCF_KMFLAG(crq) (((crq) == NULL) ? KM_SLEEP : KM_NOSLEEP) 66 67 /* 68 * The framework keeps an internal handle to use in the adaptive 69 * asynchronous case. This is the case when a client has the 70 * CRYPTO_ALWAYS_QUEUE bit clear and a software provider is used for 71 * the request. The request is completed in the context of the calling 72 * thread and kernel memory must be allocated with KM_NOSLEEP. 73 * 74 * The framework passes a pointer to the handle in crypto_req_handle_t 75 * argument when it calls the SPI of the software provider. The macros 76 * KCF_RHNDL() and KCF_SWFP_RHNDL() are used to do this. 77 * 78 * When a provider asks the framework for kmflag value via 79 * crypto_kmflag(9S) we use REQHNDL2_KMFLAG() macro. 80 */ 81 extern ulong_t kcf_swprov_hndl; 82 #define KCF_RHNDL(kmflag) (((kmflag) == KM_SLEEP) ? NULL : &kcf_swprov_hndl) 83 #define KCF_SWFP_RHNDL(crq) (((crq) == NULL) ? NULL : &kcf_swprov_hndl) 84 #define REQHNDL2_KMFLAG(rhndl) \ 85 ((rhndl == &kcf_swprov_hndl) ? KM_NOSLEEP : KM_SLEEP) 86 87 /* Internal call_req flags. They start after the public ones in api.h */ 88 89 #define CRYPTO_SETDUAL 0x00001000 /* Set the 'cont' boolean before */ 90 /* submitting the request */ 91 #define KCF_ISDUALREQ(crq) \ 92 (((crq) == NULL) ? B_FALSE : (crq->cr_flag & CRYPTO_SETDUAL)) 93 94 typedef struct kcf_prov_tried { 95 kcf_provider_desc_t *pt_pd; 96 struct kcf_prov_tried *pt_next; 97 } kcf_prov_tried_t; 98 99 /* Must be different from KM_SLEEP and KM_NOSLEEP */ 100 #define KCF_HOLD_PROV 0x1000 101 102 #define IS_FG_SUPPORTED(mdesc, fg) \ 103 (((mdesc)->pm_mech_info.cm_func_group_mask & (fg)) != 0) 104 105 #define IS_PROVIDER_TRIED(pd, tlist) \ 106 (tlist != NULL && is_in_triedlist(pd, tlist)) 107 108 #define IS_RECOVERABLE(error) \ 109 (error == CRYPTO_BUFFER_TOO_BIG || \ 110 error == CRYPTO_BUSY || \ 111 error == CRYPTO_DEVICE_ERROR || \ 112 error == CRYPTO_DEVICE_MEMORY || \ 113 error == CRYPTO_KEY_SIZE_RANGE || \ 114 error == CRYPTO_NO_PERMISSION) 115 116 #define KCF_ATOMIC_INCR(x) atomic_add_32(&(x), 1) 117 #define KCF_ATOMIC_DECR(x) atomic_add_32(&(x), -1) 118 119 /* 120 * Node structure for synchronous requests. 121 */ 122 typedef struct kcf_sreq_node { 123 /* Should always be the first field in this structure */ 124 kcf_call_type_t sn_type; 125 /* 126 * sn_cv and sr_lock are used to wait for the 127 * operation to complete. sn_lock also protects 128 * the sn_state field. 129 */ 130 kcondvar_t sn_cv; 131 kmutex_t sn_lock; 132 kcf_req_status_t sn_state; 133 134 /* 135 * Return value from the operation. This will be 136 * one of the CRYPTO_* errors defined in common.h. 137 */ 138 int sn_rv; 139 140 /* 141 * parameters to call the SPI with. This can be 142 * a pointer as we know the caller context/stack stays. 143 */ 144 struct kcf_req_params *sn_params; 145 146 /* Internal context for this request */ 147 struct kcf_context *sn_context; 148 149 /* Provider handling this request */ 150 kcf_provider_desc_t *sn_provider; 151 152 kcf_prov_cpu_t *sn_mp; 153 } kcf_sreq_node_t; 154 155 /* 156 * Node structure for asynchronous requests. A node can be on 157 * on a chain of requests hanging of the internal context 158 * structure and can be in the global software provider queue. 159 */ 160 typedef struct kcf_areq_node { 161 /* Should always be the first field in this structure */ 162 kcf_call_type_t an_type; 163 164 /* an_lock protects the field an_state */ 165 kmutex_t an_lock; 166 kcf_req_status_t an_state; 167 crypto_call_req_t an_reqarg; 168 169 /* 170 * parameters to call the SPI with. We need to 171 * save the params since the caller stack can go away. 172 */ 173 struct kcf_req_params an_params; 174 175 /* 176 * The next two fields should be NULL for operations that 177 * don't need a context. 178 */ 179 /* Internal context for this request */ 180 struct kcf_context *an_context; 181 182 /* next in chain of requests for context */ 183 struct kcf_areq_node *an_ctxchain_next; 184 185 kcondvar_t an_turn_cv; 186 boolean_t an_is_my_turn; 187 boolean_t an_isdual; /* for internal reuse */ 188 189 /* 190 * Next and previous nodes in the global software 191 * queue. These fields are NULL for a hardware 192 * provider since we use a taskq there. 193 */ 194 struct kcf_areq_node *an_next; 195 struct kcf_areq_node *an_prev; 196 197 /* Provider handling this request */ 198 kcf_provider_desc_t *an_provider; 199 kcf_prov_cpu_t *an_mp; 200 kcf_prov_tried_t *an_tried_plist; 201 202 struct kcf_areq_node *an_idnext; /* Next in ID hash */ 203 struct kcf_areq_node *an_idprev; /* Prev in ID hash */ 204 kcondvar_t an_done; /* Signal request completion */ 205 uint_t an_refcnt; 206 } kcf_areq_node_t; 207 208 #define KCF_AREQ_REFHOLD(areq) { \ 209 atomic_add_32(&(areq)->an_refcnt, 1); \ 210 ASSERT((areq)->an_refcnt != 0); \ 211 } 212 213 #define KCF_AREQ_REFRELE(areq) { \ 214 ASSERT((areq)->an_refcnt != 0); \ 215 membar_exit(); \ 216 if (atomic_add_32_nv(&(areq)->an_refcnt, -1) == 0) \ 217 kcf_free_req(areq); \ 218 } 219 220 #define GET_REQ_TYPE(arg) *((kcf_call_type_t *)(arg)) 221 222 #define NOTIFY_CLIENT(areq, err) (*(areq)->an_reqarg.cr_callback_func)(\ 223 (areq)->an_reqarg.cr_callback_arg, err); 224 225 /* For internally generated call requests for dual operations */ 226 typedef struct kcf_call_req { 227 crypto_call_req_t kr_callreq; /* external client call req */ 228 kcf_req_params_t kr_params; /* Params saved for next call */ 229 kcf_areq_node_t *kr_areq; /* Use this areq */ 230 off_t kr_saveoffset; 231 size_t kr_savelen; 232 } kcf_dual_req_t; 233 234 /* 235 * The following are some what similar to macros in callo.h, which implement 236 * callout tables. 237 * 238 * The lower four bits of the ID are used to encode the table ID to 239 * index in to. The REQID_COUNTER_HIGH bit is used to avoid any check for 240 * wrap around when generating ID. We assume that there won't be a request 241 * which takes more time than 2^^(sizeof (long) - 5) other requests submitted 242 * after it. This ensures there won't be any ID collision. 243 */ 244 #define REQID_COUNTER_HIGH (1UL << (8 * sizeof (long) - 1)) 245 #define REQID_COUNTER_SHIFT 4 246 #define REQID_COUNTER_LOW (1 << REQID_COUNTER_SHIFT) 247 #define REQID_TABLES 16 248 #define REQID_TABLE_MASK (REQID_TABLES - 1) 249 250 #define REQID_BUCKETS 512 251 #define REQID_BUCKET_MASK (REQID_BUCKETS - 1) 252 #define REQID_HASH(id) (((id) >> REQID_COUNTER_SHIFT) & REQID_BUCKET_MASK) 253 254 #define GET_REQID(areq) (areq)->an_reqarg.cr_reqid 255 #define SET_REQID(areq, val) GET_REQID(areq) = val 256 257 /* 258 * Hash table for async requests. 259 */ 260 typedef struct kcf_reqid_table { 261 kmutex_t rt_lock; 262 crypto_req_id_t rt_curid; 263 kcf_areq_node_t *rt_idhash[REQID_BUCKETS]; 264 } kcf_reqid_table_t; 265 266 /* 267 * Global software provider queue structure. Requests to be 268 * handled by a SW provider and have the ALWAYS_QUEUE flag set 269 * get queued here. 270 */ 271 typedef struct kcf_global_swq { 272 /* 273 * gs_cv and gs_lock are used to wait for new requests. 274 * gs_lock protects the changes to the queue. 275 */ 276 kcondvar_t gs_cv; 277 kmutex_t gs_lock; 278 uint_t gs_njobs; 279 uint_t gs_maxjobs; 280 kcf_areq_node_t *gs_first; 281 kcf_areq_node_t *gs_last; 282 } kcf_global_swq_t; 283 284 285 /* 286 * Internal representation of a canonical context. We contain crypto_ctx_t 287 * structure in order to have just one memory allocation. The SPI 288 * ((crypto_ctx_t *)ctx)->cc_framework_private maps to this structure. 289 */ 290 typedef struct kcf_context { 291 crypto_ctx_t kc_glbl_ctx; 292 uint_t kc_refcnt; 293 kmutex_t kc_in_use_lock; 294 /* 295 * kc_req_chain_first and kc_req_chain_last are used to chain 296 * multiple async requests using the same context. They should be 297 * NULL for sync requests. 298 */ 299 kcf_areq_node_t *kc_req_chain_first; 300 kcf_areq_node_t *kc_req_chain_last; 301 kcf_provider_desc_t *kc_prov_desc; /* Prov. descriptor */ 302 kcf_provider_desc_t *kc_sw_prov_desc; /* Prov. descriptor */ 303 kcf_mech_entry_t *kc_mech; 304 struct kcf_context *kc_secondctx; /* for dual contexts */ 305 } kcf_context_t; 306 307 /* 308 * Bump up the reference count on the framework private context. A 309 * global context or a request that references this structure should 310 * do a hold. 311 */ 312 #define KCF_CONTEXT_REFHOLD(ictx) { \ 313 atomic_add_32(&(ictx)->kc_refcnt, 1); \ 314 ASSERT((ictx)->kc_refcnt != 0); \ 315 } 316 317 /* 318 * Decrement the reference count on the framework private context. 319 * When the last reference is released, the framework private 320 * context structure is freed along with the global context. 321 */ 322 #define KCF_CONTEXT_REFRELE(ictx) { \ 323 ASSERT((ictx)->kc_refcnt != 0); \ 324 membar_exit(); \ 325 if (atomic_add_32_nv(&(ictx)->kc_refcnt, -1) == 0) \ 326 kcf_free_context(ictx); \ 327 } 328 329 /* 330 * Check if we can release the context now. In case of CRYPTO_QUEUED 331 * we do not release it as we can do it only after the provider notified 332 * us. In case of CRYPTO_BUSY, the client can retry the request using 333 * the context, so we do not release the context. 334 * 335 * This macro should be called only from the final routine in 336 * an init/update/final sequence. We do not release the context in case 337 * of update operations. We require the consumer to free it 338 * explicitly, in case it wants to abandon the operation. This is done 339 * as there may be mechanisms in ECB mode that can continue even if 340 * an operation on a block fails. 341 */ 342 #define KCF_CONTEXT_COND_RELEASE(rv, kcf_ctx) { \ 343 if (KCF_CONTEXT_DONE(rv)) \ 344 KCF_CONTEXT_REFRELE(kcf_ctx); \ 345 } 346 347 /* 348 * This macro determines whether we're done with a context. 349 */ 350 #define KCF_CONTEXT_DONE(rv) \ 351 ((rv) != CRYPTO_QUEUED && (rv) != CRYPTO_BUSY && \ 352 (rv) != CRYPTO_BUFFER_TOO_SMALL) 353 354 /* 355 * A crypto_ctx_template_t is internally a pointer to this struct 356 */ 357 typedef struct kcf_ctx_template { 358 crypto_kcf_provider_handle_t ct_prov_handle; /* provider handle */ 359 uint_t ct_generation; /* generation # */ 360 size_t ct_size; /* for freeing */ 361 crypto_spi_ctx_template_t ct_prov_tmpl; /* context template */ 362 /* from the SW prov */ 363 } kcf_ctx_template_t; 364 365 /* 366 * Structure for pool of threads working on global software queue. 367 */ 368 typedef struct kcf_pool { 369 uint32_t kp_threads; /* Number of threads in pool */ 370 uint32_t kp_idlethreads; /* Idle threads in pool */ 371 uint32_t kp_blockedthreads; /* Blocked threads in pool */ 372 373 /* 374 * cv & lock to monitor the condition when no threads 375 * are around. In this case the failover thread kicks in. 376 */ 377 kcondvar_t kp_nothr_cv; 378 kmutex_t kp_thread_lock; 379 380 /* Userspace thread creator variables. */ 381 boolean_t kp_signal_create_thread; /* Create requested flag */ 382 int kp_nthrs; /* # of threads to create */ 383 boolean_t kp_user_waiting; /* Thread waiting for work */ 384 385 /* 386 * cv & lock for the condition where more threads need to be 387 * created. kp_user_lock also protects the three fileds above. 388 */ 389 kcondvar_t kp_user_cv; /* Creator cond. variable */ 390 kmutex_t kp_user_lock; /* Creator lock */ 391 } kcf_pool_t; 392 393 394 /* 395 * State of a crypto bufcall element. 396 */ 397 typedef enum cbuf_state { 398 CBUF_FREE = 1, 399 CBUF_WAITING, 400 CBUF_RUNNING 401 } cbuf_state_t; 402 403 /* 404 * Structure of a crypto bufcall element. 405 */ 406 typedef struct kcf_cbuf_elem { 407 /* 408 * lock and cv to wait for CBUF_RUNNING to be done 409 * kc_lock also protects kc_state. 410 */ 411 kmutex_t kc_lock; 412 kcondvar_t kc_cv; 413 cbuf_state_t kc_state; 414 415 struct kcf_cbuf_elem *kc_next; 416 struct kcf_cbuf_elem *kc_prev; 417 418 void (*kc_func)(void *arg); 419 void *kc_arg; 420 } kcf_cbuf_elem_t; 421 422 /* 423 * State of a notify element. 424 */ 425 typedef enum ntfy_elem_state { 426 NTFY_WAITING = 1, 427 NTFY_RUNNING 428 } ntfy_elem_state_t; 429 430 /* 431 * Structure of a notify list element. 432 */ 433 typedef struct kcf_ntfy_elem { 434 /* 435 * lock and cv to wait for NTFY_RUNNING to be done. 436 * kn_lock also protects kn_state. 437 */ 438 kmutex_t kn_lock; 439 kcondvar_t kn_cv; 440 ntfy_elem_state_t kn_state; 441 442 struct kcf_ntfy_elem *kn_next; 443 struct kcf_ntfy_elem *kn_prev; 444 445 crypto_notify_callback_t kn_func; 446 uint32_t kn_event_mask; 447 } kcf_ntfy_elem_t; 448 449 450 /* 451 * The following values are based on the assumption that it would 452 * take around eight cpus to load a hardware provider (This is true for 453 * at least one product) and a kernel client may come from different 454 * low-priority interrupt levels. We will have CYRPTO_TASKQ_MIN number 455 * of cached taskq entries. The CRYPTO_TASKQ_MAX number is based on 456 * a throughput of 1GB/s using 512-byte buffers. These are just 457 * reasonable estimates and might need to change in future. 458 */ 459 #define CRYPTO_TASKQ_THREADS 8 460 #define CYRPTO_TASKQ_MIN 64 461 #define CRYPTO_TASKQ_MAX 2 * 1024 * 1024 462 463 extern int crypto_taskq_threads; 464 extern int crypto_taskq_minalloc; 465 extern int crypto_taskq_maxalloc; 466 extern kcf_global_swq_t *gswq; 467 extern int kcf_maxthreads; 468 extern int kcf_minthreads; 469 470 /* Door handle for talking to kcfd */ 471 extern door_handle_t kcf_dh; 472 extern kmutex_t kcf_dh_lock; 473 474 /* 475 * All pending crypto bufcalls are put on a list. cbuf_list_lock 476 * protects changes to this list. 477 */ 478 extern kmutex_t cbuf_list_lock; 479 extern kcondvar_t cbuf_list_cv; 480 481 /* 482 * All event subscribers are put on a list. kcf_notify_list_lock 483 * protects changes to this list. 484 */ 485 extern kmutex_t ntfy_list_lock; 486 extern kcondvar_t ntfy_list_cv; 487 488 boolean_t kcf_get_next_logical_provider_member(kcf_provider_desc_t *, 489 kcf_provider_desc_t *, kcf_provider_desc_t **); 490 extern int kcf_get_hardware_provider(crypto_mech_type_t, crypto_key_t *, 491 crypto_mech_type_t, crypto_key_t *, 492 kcf_provider_desc_t *, kcf_provider_desc_t **, 493 crypto_func_group_t); 494 extern int kcf_get_hardware_provider_nomech(offset_t, offset_t, 495 kcf_provider_desc_t *, kcf_provider_desc_t **); 496 extern void kcf_free_triedlist(kcf_prov_tried_t *); 497 extern kcf_prov_tried_t *kcf_insert_triedlist(kcf_prov_tried_t **, 498 kcf_provider_desc_t *, int); 499 extern kcf_provider_desc_t *kcf_get_mech_provider(crypto_mech_type_t, 500 crypto_key_t *, kcf_mech_entry_t **, int *, kcf_prov_tried_t *, 501 crypto_func_group_t, size_t); 502 extern kcf_provider_desc_t *kcf_get_dual_provider(crypto_mechanism_t *, 503 crypto_key_t *, crypto_mechanism_t *, crypto_key_t *, 504 kcf_mech_entry_t **, crypto_mech_type_t *, 505 crypto_mech_type_t *, int *, kcf_prov_tried_t *, 506 crypto_func_group_t, crypto_func_group_t, size_t); 507 extern crypto_ctx_t *kcf_new_ctx(crypto_call_req_t *, kcf_provider_desc_t *, 508 crypto_session_id_t); 509 extern int kcf_submit_request(kcf_provider_desc_t *, crypto_ctx_t *, 510 crypto_call_req_t *, kcf_req_params_t *, boolean_t); 511 extern void kcf_sched_init(void); 512 extern void kcf_sched_start(void); 513 extern void kcf_sop_done(kcf_sreq_node_t *, int); 514 extern void kcf_aop_done(kcf_areq_node_t *, int); 515 extern int common_submit_request(kcf_provider_desc_t *, 516 crypto_ctx_t *, kcf_req_params_t *, crypto_req_handle_t); 517 extern void kcf_free_context(kcf_context_t *); 518 519 extern int kcf_svc_wait(int *); 520 extern int kcf_svc_do_run(void); 521 extern int kcf_need_fips140_verification(kcf_provider_desc_t *); 522 extern int kcf_need_signature_verification(kcf_provider_desc_t *); 523 extern void kcf_verify_signature(void *); 524 extern struct modctl *kcf_get_modctl(crypto_provider_info_t *); 525 extern void verify_unverified_providers(); 526 extern void kcf_free_req(kcf_areq_node_t *areq); 527 extern void crypto_bufcall_service(void); 528 529 extern void kcf_walk_ntfylist(uint32_t, void *); 530 extern void kcf_do_notify(kcf_provider_desc_t *, boolean_t); 531 532 extern kcf_dual_req_t *kcf_alloc_req(crypto_call_req_t *); 533 extern void kcf_next_req(void *, int); 534 extern void kcf_last_req(void *, int); 535 536 #ifdef __cplusplus 537 } 538 #endif 539 540 #endif /* _SYS_CRYPTO_SCHED_IMPL_H */ 541