Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/norma/xmm_user.c
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1 /* 2 * Mach Operating System 3 * Copyright (c) 1991 Carnegie Mellon University 4 * All Rights Reserved. 5 * 6 * Permission to use, copy, modify and distribute this software and its 7 * documentation is hereby granted, provided that both the copyright 8 * notice and this permission notice appear in all copies of the 9 * software, derivative works or modified versions, and any portions 10 * thereof, and that both notices appear in supporting documentation. 11 * 12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS 13 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 15 * 16 * Carnegie Mellon requests users of this software to return to 17 * 18 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 19 * School of Computer Science 20 * Carnegie Mellon University 21 * Pittsburgh PA 15213-3890 22 * 23 * any improvements or extensions that they make and grant Carnegie the 24 * rights to redistribute these changes. 25 */ 26 /* 27 * HISTORY 28 * $Log: xmm_user.c,v $ 29 * Revision 2.6 92/03/10 16:38:42 jsb 30 * Merged in norma branch changes as of NORMA_MK7. 31 * [92/03/09 12:53:39 jsb] 32 * 33 * Revision 2.4.3.4 92/03/03 16:24:12 jeffreyh 34 * Pick up fix from jsb to call K_SET_READY with MAY_CACHE_FALSE. This 35 * fixes a memory leak. 36 * [92/02/26 12:25:25 jeffreyh] 37 * 38 * Revision 2.4.3.3 92/02/21 11:28:30 jsb 39 * Copy send right to memory object, so that each kernel can release its 40 * own send right to memory object. 41 * [92/02/20 13:57:24 jsb] 42 * 43 * Reference mobj on port to mobj conversion; release when done. 44 * [92/02/20 10:54:28 jsb] 45 * 46 * Removed initialized flag and corresponding code to detect multiple 47 * initialization, since xmm_kobj_link now handles such detection. 48 * [92/02/18 08:47:44 jsb] 49 * 50 * Changed reply->mobj to reply->kobj. 51 * [92/02/16 18:22:26 jsb] 52 * 53 * Explicitly provide name parameter to xmm_decl macro. 54 * Changes for reference counting termination protocol. 55 * [92/02/16 15:54:47 jsb] 56 * 57 * Removed is_internal_memory_object_call; xmm internal objects now 58 * create their own xmm stacks and objects and thus will never be 59 * seen here. Use new MEMORY_OBJECT_COPY_TEMPORARY strategy instead 60 * of MEMORY_OBJECT_COPY_NONE for setting internal objects ready. 61 * Removed ipc_kobject_set of memory_object; this was a hack for when 62 * xmm_server.c stored a pointer to the svm mobj stack in the 63 * memory_object kobject. We now use a separate port (the xmm object 64 * port) for this association, and break that association elsewhere. 65 * [92/02/11 11:22:23 jsb] 66 * 67 * Remove vm_object_lookup_by_pager. 68 * [92/02/10 09:41:36 jsb] 69 * 70 * Use new xmm_decl, and new memory_object_name and deallocation protocol. 71 * Let mig do automatic conversion of memory_control port into user obj. 72 * Cleaned up memory_object_create support. 73 * [92/02/09 14:01:13 jsb] 74 * 75 * Revision 2.4.3.2 92/01/21 21:55:05 jsb 76 * De-linted. Supports new (dlb) memory object routines. 77 * Supports arbitrary reply ports to lock_request, etc. 78 * Converted mach_port_t (and port_t) to ipc_port_t. 79 * [92/01/20 17:48:19 jsb] 80 * 81 * Revision 2.4.3.1 92/01/03 16:39:03 jsb 82 * Picked up temporary fix to m_user_terminate from dlb. 83 * [91/12/24 14:31:09 jsb] 84 * 85 * Revision 2.4 91/08/28 11:16:30 jsb 86 * Added definition for xxx_memory_object_lock_request, and temporary 87 * stubs for data_supply, object_ready, and change_attributes. 88 * [91/08/16 14:22:37 jsb] 89 * 90 * Added check for internal memory objects to xmm_user_create. 91 * [91/08/15 10:14:19 jsb] 92 * 93 * Revision 2.3 91/07/01 08:26:46 jsb 94 * Collect garbage. Support memory_object_create. 95 * Disassociate kobj from memory_control before calling 96 * memory_object_terminate to prevent upcalls on terminated kobj. 97 * [91/06/29 15:51:50 jsb] 98 * 99 * Revision 2.2 91/06/17 15:48:48 jsb 100 * Renamed xmm_vm_object_lookup. 101 * [91/06/17 13:20:06 jsb] 102 * 103 * First checkin. 104 * [91/06/17 11:02:47 jsb] 105 * 106 */ 107 /* 108 * File: norma/xmm_user.c 109 * Author: Joseph S. Barrera III 110 * Date: 1991 111 * 112 * Interface between memory managers and xmm system. 113 */ 114 115 #include <norma/xmm_obj.h> 116 #include <norma/xmm_user_rename.h> 117 #include <ipc/ipc_space.h> 118 #include <ipc/ipc_port.h> 119 #include <vm/memory_object.h> 120 #include <vm/vm_fault.h> 121 #include <vm/vm_map.h> 122 #include <vm/vm_object.h> 123 #include <vm/vm_page.h> 124 #include <vm/vm_pageout.h> 125 126 /* 127 * Since we ALWAYS have an SVM module above us, 128 * we NEVER have more than one memory_control per memory_object. 129 * Thus we can combine mobj and kobj. 130 */ 131 132 struct mobj { 133 struct xmm_obj obj; 134 ipc_port_t memory_object; 135 ipc_port_t memory_control; 136 ipc_port_t memory_object_name; 137 }; 138 139 #undef KOBJ 140 #define KOBJ ((struct mobj *) kobj) 141 142 #define m_user_deallocate m_interpose_deallocate 143 144 #define k_user_data_unavailable k_invalid_data_unavailable 145 #define k_user_get_attributes k_invalid_get_attributes 146 #define k_user_lock_request k_invalid_lock_request 147 #define k_user_data_error k_invalid_data_error 148 #define k_user_set_ready k_invalid_set_ready 149 #define k_user_destroy k_invalid_destroy 150 #define k_user_data_supply k_invalid_data_supply 151 152 xmm_decl(user, "user", sizeof(struct mobj)); 153 154 /* 155 * Translate from memory_control to kobj. Take a reference. 156 */ 157 xmm_obj_t 158 xmm_kobj_lookup(memory_control) 159 ipc_port_t memory_control; 160 { 161 register xmm_obj_t kobj; 162 163 if (memory_control == IP_NULL) { 164 return XMM_OBJ_NULL; 165 } 166 ip_lock(memory_control); 167 if (ip_kotype(memory_control) == IKOT_PAGING_REQUEST) { 168 kobj = (xmm_obj_t) memory_control->ip_kobject; 169 xmm_obj_reference(kobj); 170 } else { 171 kobj = XMM_OBJ_NULL; 172 } 173 ip_unlock(memory_control); 174 return kobj; 175 } 176 177 /* 178 * We create our own memory_control and memory_object_name ports. 179 * This is easier and less confusing than each kernel allocating 180 * its own ports, particularly for name ports, since everyone should 181 * see the same name port for the same object. 182 */ 183 kern_return_t 184 xmm_user_create(memory_object, new_mobj) 185 ipc_port_t memory_object; 186 xmm_obj_t *new_mobj; 187 { 188 ipc_port_t memory_control; 189 ipc_port_t memory_object_name; 190 kern_return_t kr; 191 xmm_obj_t mobj; 192 193 /* 194 * Allocate request port. 195 */ 196 memory_control = ipc_port_alloc_kernel(); 197 if (memory_control == IP_NULL) { 198 panic("xmm_user_create: memory_control"); 199 } 200 201 /* 202 * Allocate name port. 203 */ 204 memory_object_name = ipc_port_alloc_kernel(); 205 if (memory_object_name == IP_NULL) { 206 panic("xmm_user_create: memory_object_name"); 207 } 208 209 /* 210 * Allocate mobj. 211 */ 212 kr = xmm_obj_allocate(&user_class, XMM_OBJ_NULL, &mobj); 213 if (kr != KERN_SUCCESS) { 214 return kr; 215 } 216 217 MOBJ->memory_object = ipc_port_copy_send(memory_object); 218 MOBJ->memory_control = memory_control; 219 MOBJ->memory_object_name = memory_object_name; 220 221 /* 222 * Grab a reference for mobj and associate it with memory_control port. 223 */ 224 xmm_obj_reference(mobj); 225 ipc_kobject_set(memory_control, (ipc_kobject_t) mobj, 226 IKOT_PAGING_REQUEST); 227 *new_mobj = mobj; 228 return KERN_SUCCESS; 229 } 230 231 m_user_init(mobj, k_kobj, pagesize, internal, size) 232 xmm_obj_t mobj; 233 xmm_obj_t k_kobj; 234 vm_size_t pagesize; 235 boolean_t internal; 236 vm_size_t size; 237 { 238 xmm_obj_t kobj = mobj; 239 240 #ifdef lint 241 M_INIT(mobj, k_kobj, pagesize, internal, size); 242 #endif lint 243 xmm_kobj_link(kobj, k_kobj); 244 245 assert(MOBJ->memory_object != IP_NULL); 246 if (internal) { 247 /* acquire a naked send right for the default pager */ 248 ipc_port_t default_pager = memory_manager_default_reference(); 249 250 /* consumes the naked send right for default_pager */ 251 (void) k_memory_object_create(default_pager, 252 MOBJ->memory_object, size, 253 MOBJ->memory_control, 254 MOBJ->memory_object_name, 255 PAGE_SIZE); 256 257 /* call set_ready, since default pager won't */ 258 return K_SET_READY(mobj, OBJECT_READY_TRUE, MAY_CACHE_FALSE, 259 MEMORY_OBJECT_COPY_TEMPORARY, 260 USE_OLD_PAGEOUT_TRUE, 261 ipc_port_make_send(MOBJ-> 262 memory_object_name), 263 XMM_REPLY_NULL); 264 } else { 265 (void) memory_object_init(MOBJ->memory_object, 266 MOBJ->memory_control, 267 MOBJ->memory_object_name, 268 PAGE_SIZE); 269 } 270 return KERN_SUCCESS; 271 } 272 273 m_user_terminate(mobj, kobj) 274 xmm_obj_t mobj; 275 xmm_obj_t kobj; 276 { 277 kern_return_t kr; 278 279 #ifdef lint 280 M_TERMINATE(mobj, kobj); 281 #endif lint 282 ipc_kobject_set(MOBJ->memory_control, IKO_NULL, IKOT_NONE); 283 kr = memory_object_terminate(MOBJ->memory_object, 284 MOBJ->memory_control, 285 MOBJ->memory_object_name); 286 xmm_obj_release(mobj); 287 return kr; 288 } 289 290 m_user_copy(mobj, kobj, offset, length, new_mobj) 291 xmm_obj_t mobj; 292 xmm_obj_t kobj; 293 vm_offset_t offset; 294 vm_size_t length; 295 xmm_obj_t new_mobj; 296 { 297 #ifdef lint 298 M_COPY(mobj, kobj, offset, length, new_mobj); 299 #endif lint 300 panic("m_user_copy"); 301 /* NOTREACHED */ 302 } 303 304 m_user_data_request(mobj, kobj, offset, length, desired_access) 305 xmm_obj_t mobj; 306 xmm_obj_t kobj; 307 vm_offset_t offset; 308 vm_size_t length; 309 vm_prot_t desired_access; 310 { 311 #ifdef lint 312 M_DATA_REQUEST(mobj, kobj, offset, length, desired_access); 313 #endif lint 314 return memory_object_data_request(MOBJ->memory_object, 315 KOBJ->memory_control, 316 offset, 317 length, 318 desired_access); 319 } 320 321 m_user_data_unlock(mobj, kobj, offset, length, desired_access) 322 xmm_obj_t mobj; 323 xmm_obj_t kobj; 324 vm_offset_t offset; 325 vm_size_t length; 326 vm_prot_t desired_access; 327 { 328 #ifdef lint 329 M_DATA_UNLOCK(mobj, kobj, offset, length, desired_access); 330 #endif lint 331 return memory_object_data_unlock(MOBJ->memory_object, 332 KOBJ->memory_control, 333 offset, 334 length, 335 desired_access); 336 } 337 338 m_user_data_write(mobj, kobj, offset, data, length) 339 xmm_obj_t mobj; 340 xmm_obj_t kobj; 341 vm_offset_t offset; 342 vm_offset_t data; 343 vm_size_t length; 344 { 345 #ifdef lint 346 M_DATA_WRITE(mobj, kobj, offset, data, length); 347 #endif lint 348 return memory_object_data_write(MOBJ->memory_object, 349 KOBJ->memory_control, 350 offset, 351 data, 352 length); 353 } 354 355 m_user_lock_completed(reply, offset, length) 356 xmm_reply_t reply; 357 vm_offset_t offset; 358 vm_size_t length; 359 { 360 xmm_obj_t kobj; 361 kern_return_t kr; 362 363 #ifdef lint 364 M_LOCK_COMPLETED(reply, offset, length); 365 #endif lint 366 kobj = reply->kobj; 367 assert(kobj->class == &user_class); 368 kr = memory_object_lock_completed(reply->reply_to, 369 reply->reply_to_type, 370 KOBJ->memory_control, 371 offset, 372 length); 373 xmm_reply_deallocate(reply); 374 return kr; 375 } 376 377 m_user_supply_completed(reply, offset, length, result, error_offset) 378 xmm_reply_t reply; 379 vm_offset_t offset; 380 vm_size_t length; 381 kern_return_t result; 382 vm_offset_t error_offset; 383 { 384 xmm_obj_t kobj; 385 kern_return_t kr; 386 387 #ifdef lint 388 M_SUPPLY_COMPLETED(reply, offset, length, result, error_offset); 389 #endif lint 390 kobj = reply->kobj; 391 assert(kobj->class == &user_class); 392 kr = memory_object_supply_completed(reply->reply_to, 393 reply->reply_to_type, 394 KOBJ->memory_control, 395 offset, 396 length, 397 result, 398 error_offset); 399 xmm_reply_deallocate(reply); 400 return kr; 401 } 402 403 m_user_data_return(mobj, kobj, offset, data, length) 404 xmm_obj_t mobj; 405 xmm_obj_t kobj; 406 vm_offset_t offset; 407 vm_offset_t data; 408 vm_size_t length; 409 { 410 #ifdef lint 411 M_DATA_RETURN(mobj, kobj, offset, data, length); 412 #endif lint 413 return memory_object_data_return(MOBJ->memory_object, 414 KOBJ->memory_control, 415 offset, 416 data, 417 length); 418 } 419 420 m_user_change_completed(reply, may_cache, copy_strategy) 421 xmm_reply_t reply; 422 boolean_t may_cache; 423 memory_object_copy_strategy_t copy_strategy; 424 { 425 kern_return_t kr; 426 427 #ifdef lint 428 M_CHANGE_COMPLETED(reply, may_cache, copy_strategy); 429 #endif lint 430 kr = memory_object_change_completed(reply->reply_to, 431 reply->reply_to_type, 432 may_cache, 433 copy_strategy); 434 xmm_reply_deallocate(reply); 435 return kr; 436 } 437 438 kern_return_t 439 memory_object_data_provided(kobj, offset, data, length, lock_value) 440 xmm_obj_t kobj; 441 vm_offset_t offset; 442 pointer_t data; 443 unsigned int length; 444 vm_prot_t lock_value; 445 { 446 kern_return_t kr; 447 448 if (kobj == XMM_OBJ_NULL) { 449 return KERN_INVALID_ARGUMENT; 450 } 451 kr = K_DATA_SUPPLY(kobj, offset, data, length, lock_value, 452 PRECIOUS_FALSE, XMM_REPLY_NULL); 453 xmm_obj_release(kobj); 454 return kr; 455 } 456 457 kern_return_t 458 memory_object_data_unavailable(kobj, offset, length) 459 xmm_obj_t kobj; 460 vm_offset_t offset; 461 vm_size_t length; 462 { 463 kern_return_t kr; 464 465 if (kobj == XMM_OBJ_NULL) { 466 return KERN_INVALID_ARGUMENT; 467 } 468 kr = K_DATA_UNAVAILABLE(kobj, offset, length); 469 xmm_obj_release(kobj); 470 return kr; 471 } 472 473 kern_return_t 474 memory_object_get_attributes(kobj, object_ready, may_cache, copy_strategy) 475 xmm_obj_t kobj; 476 boolean_t *object_ready; 477 boolean_t *may_cache; 478 memory_object_copy_strategy_t *copy_strategy; 479 { 480 kern_return_t kr; 481 482 if (kobj == XMM_OBJ_NULL) { 483 return KERN_INVALID_ARGUMENT; 484 } 485 kr = K_GET_ATTRIBUTES(kobj, object_ready, may_cache, copy_strategy); 486 xmm_obj_release(kobj); 487 return kr; 488 } 489 490 kern_return_t 491 memory_object_lock_request(kobj, offset, length, should_return, should_flush, 492 prot, reply_to, reply_to_type) 493 xmm_obj_t kobj; 494 vm_offset_t offset; 495 vm_size_t length; 496 int should_return; 497 boolean_t should_flush; 498 vm_prot_t prot; 499 ipc_port_t reply_to; 500 mach_msg_type_name_t reply_to_type; 501 { 502 xmm_reply_t reply; 503 kern_return_t kr; 504 505 if (kobj == XMM_OBJ_NULL) { 506 return KERN_INVALID_ARGUMENT; 507 } 508 kr = xmm_reply_allocate(kobj, reply_to, reply_to_type, &reply); 509 if (kr != KERN_SUCCESS) { 510 return kr; 511 } 512 kr = K_LOCK_REQUEST(kobj, offset, length, should_return, should_flush, 513 prot, reply); 514 xmm_obj_release(kobj); 515 return kr; 516 } 517 518 kern_return_t 519 xxx_memory_object_lock_request(kobj, offset, size, should_clean, should_flush, 520 prot, reply_to, reply_to_type) 521 xmm_obj_t kobj; 522 vm_offset_t offset; 523 vm_size_t size; 524 boolean_t should_clean; 525 boolean_t should_flush; 526 vm_prot_t prot; 527 ipc_port_t reply_to; 528 mach_msg_type_name_t reply_to_type; 529 { 530 int should_return; 531 532 if (should_clean) { 533 should_return = MEMORY_OBJECT_RETURN_DIRTY; 534 } else { 535 should_return = MEMORY_OBJECT_RETURN_NONE; 536 } 537 return memory_object_lock_request(kobj, offset, size, should_return, 538 should_flush, prot, reply_to, 539 reply_to_type); 540 } 541 542 kern_return_t 543 memory_object_data_error(kobj, offset, length, error_value) 544 xmm_obj_t kobj; 545 vm_offset_t offset; 546 vm_size_t length; 547 kern_return_t error_value; 548 { 549 kern_return_t kr; 550 551 if (kobj == XMM_OBJ_NULL) { 552 return KERN_INVALID_ARGUMENT; 553 } 554 kr = K_DATA_ERROR(kobj, offset, length, error_value); 555 xmm_obj_release(kobj); 556 return kr; 557 } 558 559 kern_return_t 560 memory_object_set_attributes(kobj, object_ready, may_cache, copy_strategy) 561 xmm_obj_t kobj; 562 boolean_t object_ready; 563 boolean_t may_cache; 564 memory_object_copy_strategy_t copy_strategy; 565 { 566 kern_return_t kr; 567 568 if (kobj == XMM_OBJ_NULL) { 569 return KERN_INVALID_ARGUMENT; 570 } 571 kr = K_SET_READY(kobj, object_ready, may_cache, copy_strategy, 572 USE_OLD_PAGEOUT_TRUE, 573 ipc_port_make_send(KOBJ->memory_object_name), 574 XMM_REPLY_NULL); 575 xmm_obj_release(kobj); 576 return kr; 577 } 578 579 kern_return_t 580 memory_object_destroy(kobj, reason) 581 xmm_obj_t kobj; 582 kern_return_t reason; 583 { 584 kern_return_t kr; 585 586 if (kobj == XMM_OBJ_NULL) { 587 return KERN_INVALID_ARGUMENT; 588 } 589 kr = K_DESTROY(kobj, reason); 590 xmm_obj_release(kobj); 591 return kr; 592 } 593 594 kern_return_t 595 memory_object_data_supply(kobj, offset, data, length, lock_value, precious, 596 reply_to, reply_to_type) 597 xmm_obj_t kobj; 598 vm_offset_t offset; 599 pointer_t data; 600 unsigned int length; 601 vm_prot_t lock_value; 602 boolean_t precious; 603 ipc_port_t reply_to; 604 mach_msg_type_name_t reply_to_type; 605 { 606 xmm_reply_t reply; 607 kern_return_t kr; 608 609 if (kobj == XMM_OBJ_NULL) { 610 return KERN_INVALID_ARGUMENT; 611 } 612 kr = xmm_reply_allocate(kobj, reply_to, reply_to_type, &reply); 613 if (kr != KERN_SUCCESS) { 614 return kr; 615 } 616 kr = K_DATA_SUPPLY(kobj, offset, data, length, lock_value, precious, 617 reply); 618 xmm_obj_release(kobj); 619 return kr; 620 } 621 622 kern_return_t 623 memory_object_ready(kobj, may_cache, copy_strategy) 624 xmm_obj_t kobj; 625 boolean_t may_cache; 626 memory_object_copy_strategy_t copy_strategy; 627 { 628 kern_return_t kr; 629 630 if (kobj == XMM_OBJ_NULL) { 631 return KERN_INVALID_ARGUMENT; 632 } 633 kr = K_SET_READY(kobj, OBJECT_READY_TRUE, may_cache, copy_strategy, 634 USE_OLD_PAGEOUT_FALSE, 635 ipc_port_make_send(KOBJ->memory_object_name), 636 XMM_REPLY_NULL); 637 xmm_obj_release(kobj); 638 return kr; 639 } 640 641 kern_return_t 642 memory_object_change_attributes(kobj, may_cache, copy_strategy, reply_to, 643 reply_to_type) 644 xmm_obj_t kobj; 645 boolean_t may_cache; 646 memory_object_copy_strategy_t copy_strategy; 647 ipc_port_t reply_to; 648 mach_msg_type_name_t reply_to_type; 649 { 650 xmm_reply_t reply; 651 kern_return_t kr; 652 653 if (kobj == XMM_OBJ_NULL) { 654 return KERN_INVALID_ARGUMENT; 655 } 656 kr = xmm_reply_allocate(kobj, reply_to, reply_to_type, &reply); 657 if (kr != KERN_SUCCESS) { 658 return kr; 659 } 660 kr = K_SET_READY(kobj, OBJECT_READY_TRUE, may_cache, copy_strategy, 661 USE_OLD_PAGEOUT_FALSE, 662 ipc_port_make_send(KOBJ->memory_object_name), reply); 663 xmm_obj_release(kobj); 664 return kr; 665 }
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