1 // SPDX-License-Identifier: GPL-2.0 2 // Copyright (c) 2011-2018, The Linux Foundation. All rights reserved. 3 // Copyright (c) 2018, Linaro Limited 4 5 #include <linux/completion.h> 6 #include <linux/device.h> 7 #include <linux/dma-buf.h> 8 #include <linux/dma-mapping.h> 9 #include <linux/idr.h> 10 #include <linux/list.h> 11 #include <linux/miscdevice.h> 12 #include <linux/module.h> 13 #include <linux/of_address.h> 14 #include <linux/of.h> 15 #include <linux/sort.h> 16 #include <linux/of_platform.h> 17 #include <linux/rpmsg.h> 18 #include <linux/scatterlist.h> 19 #include <linux/slab.h> 20 #include <uapi/misc/fastrpc.h> 21 22 #define ADSP_DOMAIN_ID (0) 23 #define MDSP_DOMAIN_ID (1) 24 #define SDSP_DOMAIN_ID (2) 25 #define CDSP_DOMAIN_ID (3) 26 #define FASTRPC_DEV_MAX 4 /* adsp, mdsp, slpi, cdsp*/ 27 #define FASTRPC_MAX_SESSIONS 9 /*8 compute, 1 cpz*/ 28 #define FASTRPC_ALIGN 128 29 #define FASTRPC_MAX_FDLIST 16 30 #define FASTRPC_MAX_CRCLIST 64 31 #define FASTRPC_PHYS(p) ((p) & 0xffffffff) 32 #define FASTRPC_CTX_MAX (256) 33 #define FASTRPC_INIT_HANDLE 1 34 #define FASTRPC_CTXID_MASK (0xFF0) 35 #define INIT_FILELEN_MAX (2 * 1024 * 1024) 36 #define FASTRPC_DEVICE_NAME "fastrpc" 37 #define ADSP_MMAP_ADD_PAGES 0x1000 38 39 /* Retrives number of input buffers from the scalars parameter */ 40 #define REMOTE_SCALARS_INBUFS(sc) (((sc) >> 16) & 0x0ff) 41 42 /* Retrives number of output buffers from the scalars parameter */ 43 #define REMOTE_SCALARS_OUTBUFS(sc) (((sc) >> 8) & 0x0ff) 44 45 /* Retrives number of input handles from the scalars parameter */ 46 #define REMOTE_SCALARS_INHANDLES(sc) (((sc) >> 4) & 0x0f) 47 48 /* Retrives number of output handles from the scalars parameter */ 49 #define REMOTE_SCALARS_OUTHANDLES(sc) ((sc) & 0x0f) 50 51 #define REMOTE_SCALARS_LENGTH(sc) (REMOTE_SCALARS_INBUFS(sc) + \ 52 REMOTE_SCALARS_OUTBUFS(sc) + \ 53 REMOTE_SCALARS_INHANDLES(sc)+ \ 54 REMOTE_SCALARS_OUTHANDLES(sc)) 55 #define FASTRPC_BUILD_SCALARS(attr, method, in, out, oin, oout) \ 56 (((attr & 0x07) << 29) | \ 57 ((method & 0x1f) << 24) | \ 58 ((in & 0xff) << 16) | \ 59 ((out & 0xff) << 8) | \ 60 ((oin & 0x0f) << 4) | \ 61 (oout & 0x0f)) 62 63 #define FASTRPC_SCALARS(method, in, out) \ 64 FASTRPC_BUILD_SCALARS(0, method, in, out, 0, 0) 65 66 #define FASTRPC_CREATE_PROCESS_NARGS 6 67 /* Remote Method id table */ 68 #define FASTRPC_RMID_INIT_ATTACH 0 69 #define FASTRPC_RMID_INIT_RELEASE 1 70 #define FASTRPC_RMID_INIT_MMAP 4 71 #define FASTRPC_RMID_INIT_MUNMAP 5 72 #define FASTRPC_RMID_INIT_CREATE 6 73 #define FASTRPC_RMID_INIT_CREATE_ATTR 7 74 #define FASTRPC_RMID_INIT_CREATE_STATIC 8 75 76 /* Protection Domain(PD) ids */ 77 #define AUDIO_PD (0) /* also GUEST_OS PD? */ 78 #define USER_PD (1) 79 #define SENSORS_PD (2) 80 81 #define miscdev_to_cctx(d) container_of(d, struct fastrpc_channel_ctx, miscdev) 82 83 static const char *domains[FASTRPC_DEV_MAX] = { "adsp", "mdsp", 84 "sdsp", "cdsp"}; 85 struct fastrpc_phy_page { 86 u64 addr; /* physical address */ 87 u64 size; /* size of contiguous region */ 88 }; 89 90 struct fastrpc_invoke_buf { 91 u32 num; /* number of contiguous regions */ 92 u32 pgidx; /* index to start of contiguous region */ 93 }; 94 95 struct fastrpc_remote_arg { 96 u64 pv; 97 u64 len; 98 }; 99 100 struct fastrpc_mmap_rsp_msg { 101 u64 vaddr; 102 }; 103 104 struct fastrpc_mmap_req_msg { 105 s32 pgid; 106 u32 flags; 107 u64 vaddr; 108 s32 num; 109 }; 110 111 struct fastrpc_munmap_req_msg { 112 s32 pgid; 113 u64 vaddr; 114 u64 size; 115 }; 116 117 struct fastrpc_msg { 118 int pid; /* process group id */ 119 int tid; /* thread id */ 120 u64 ctx; /* invoke caller context */ 121 u32 handle; /* handle to invoke */ 122 u32 sc; /* scalars structure describing the data */ 123 u64 addr; /* physical address */ 124 u64 size; /* size of contiguous region */ 125 }; 126 127 struct fastrpc_invoke_rsp { 128 u64 ctx; /* invoke caller context */ 129 int retval; /* invoke return value */ 130 }; 131 132 struct fastrpc_buf_overlap { 133 u64 start; 134 u64 end; 135 int raix; 136 u64 mstart; 137 u64 mend; 138 u64 offset; 139 }; 140 141 struct fastrpc_buf { 142 struct fastrpc_user *fl; 143 struct dma_buf *dmabuf; 144 struct device *dev; 145 void *virt; 146 u64 phys; 147 u64 size; 148 /* Lock for dma buf attachments */ 149 struct mutex lock; 150 struct list_head attachments; 151 /* mmap support */ 152 struct list_head node; /* list of user requested mmaps */ 153 uintptr_t raddr; 154 }; 155 156 struct fastrpc_dma_buf_attachment { 157 struct device *dev; 158 struct sg_table sgt; 159 struct list_head node; 160 }; 161 162 struct fastrpc_map { 163 struct list_head node; 164 struct fastrpc_user *fl; 165 int fd; 166 struct dma_buf *buf; 167 struct sg_table *table; 168 struct dma_buf_attachment *attach; 169 u64 phys; 170 u64 size; 171 void *va; 172 u64 len; 173 struct kref refcount; 174 }; 175 176 struct fastrpc_invoke_ctx { 177 int nscalars; 178 int nbufs; 179 int retval; 180 int pid; 181 int tgid; 182 u32 sc; 183 u32 *crc; 184 u64 ctxid; 185 u64 msg_sz; 186 struct kref refcount; 187 struct list_head node; /* list of ctxs */ 188 struct completion work; 189 struct work_struct put_work; 190 struct fastrpc_msg msg; 191 struct fastrpc_user *fl; 192 struct fastrpc_remote_arg *rpra; 193 struct fastrpc_map **maps; 194 struct fastrpc_buf *buf; 195 struct fastrpc_invoke_args *args; 196 struct fastrpc_buf_overlap *olaps; 197 struct fastrpc_channel_ctx *cctx; 198 }; 199 200 struct fastrpc_session_ctx { 201 struct device *dev; 202 int sid; 203 bool used; 204 bool valid; 205 }; 206 207 struct fastrpc_channel_ctx { 208 int domain_id; 209 int sesscount; 210 struct rpmsg_device *rpdev; 211 struct fastrpc_session_ctx session[FASTRPC_MAX_SESSIONS]; 212 spinlock_t lock; 213 struct idr ctx_idr; 214 struct list_head users; 215 struct miscdevice miscdev; 216 struct kref refcount; 217 }; 218 219 struct fastrpc_user { 220 struct list_head user; 221 struct list_head maps; 222 struct list_head pending; 223 struct list_head mmaps; 224 225 struct fastrpc_channel_ctx *cctx; 226 struct fastrpc_session_ctx *sctx; 227 struct fastrpc_buf *init_mem; 228 229 int tgid; 230 int pd; 231 /* Lock for lists */ 232 spinlock_t lock; 233 /* lock for allocations */ 234 struct mutex mutex; 235 }; 236 237 static void fastrpc_free_map(struct kref *ref) 238 { 239 struct fastrpc_map *map; 240 241 map = container_of(ref, struct fastrpc_map, refcount); 242 243 if (map->table) { 244 dma_buf_unmap_attachment(map->attach, map->table, 245 DMA_BIDIRECTIONAL); 246 dma_buf_detach(map->buf, map->attach); 247 dma_buf_put(map->buf); 248 } 249 250 kfree(map); 251 } 252 253 static void fastrpc_map_put(struct fastrpc_map *map) 254 { 255 if (map) 256 kref_put(&map->refcount, fastrpc_free_map); 257 } 258 259 static void fastrpc_map_get(struct fastrpc_map *map) 260 { 261 if (map) 262 kref_get(&map->refcount); 263 } 264 265 static int fastrpc_map_find(struct fastrpc_user *fl, int fd, 266 struct fastrpc_map **ppmap) 267 { 268 struct fastrpc_map *map = NULL; 269 270 mutex_lock(&fl->mutex); 271 list_for_each_entry(map, &fl->maps, node) { 272 if (map->fd == fd) { 273 fastrpc_map_get(map); 274 *ppmap = map; 275 mutex_unlock(&fl->mutex); 276 return 0; 277 } 278 } 279 mutex_unlock(&fl->mutex); 280 281 return -ENOENT; 282 } 283 284 static void fastrpc_buf_free(struct fastrpc_buf *buf) 285 { 286 dma_free_coherent(buf->dev, buf->size, buf->virt, 287 FASTRPC_PHYS(buf->phys)); 288 kfree(buf); 289 } 290 291 static int fastrpc_buf_alloc(struct fastrpc_user *fl, struct device *dev, 292 u64 size, struct fastrpc_buf **obuf) 293 { 294 struct fastrpc_buf *buf; 295 296 buf = kzalloc(sizeof(*buf), GFP_KERNEL); 297 if (!buf) 298 return -ENOMEM; 299 300 INIT_LIST_HEAD(&buf->attachments); 301 INIT_LIST_HEAD(&buf->node); 302 mutex_init(&buf->lock); 303 304 buf->fl = fl; 305 buf->virt = NULL; 306 buf->phys = 0; 307 buf->size = size; 308 buf->dev = dev; 309 buf->raddr = 0; 310 311 buf->virt = dma_alloc_coherent(dev, buf->size, (dma_addr_t *)&buf->phys, 312 GFP_KERNEL); 313 if (!buf->virt) { 314 mutex_destroy(&buf->lock); 315 kfree(buf); 316 return -ENOMEM; 317 } 318 319 if (fl->sctx && fl->sctx->sid) 320 buf->phys += ((u64)fl->sctx->sid << 32); 321 322 *obuf = buf; 323 324 return 0; 325 } 326 327 static void fastrpc_channel_ctx_free(struct kref *ref) 328 { 329 struct fastrpc_channel_ctx *cctx; 330 331 cctx = container_of(ref, struct fastrpc_channel_ctx, refcount); 332 333 kfree(cctx); 334 } 335 336 static void fastrpc_channel_ctx_get(struct fastrpc_channel_ctx *cctx) 337 { 338 kref_get(&cctx->refcount); 339 } 340 341 static void fastrpc_channel_ctx_put(struct fastrpc_channel_ctx *cctx) 342 { 343 kref_put(&cctx->refcount, fastrpc_channel_ctx_free); 344 } 345 346 static void fastrpc_context_free(struct kref *ref) 347 { 348 struct fastrpc_invoke_ctx *ctx; 349 struct fastrpc_channel_ctx *cctx; 350 unsigned long flags; 351 int i; 352 353 ctx = container_of(ref, struct fastrpc_invoke_ctx, refcount); 354 cctx = ctx->cctx; 355 356 for (i = 0; i < ctx->nscalars; i++) 357 fastrpc_map_put(ctx->maps[i]); 358 359 if (ctx->buf) 360 fastrpc_buf_free(ctx->buf); 361 362 spin_lock_irqsave(&cctx->lock, flags); 363 idr_remove(&cctx->ctx_idr, ctx->ctxid >> 4); 364 spin_unlock_irqrestore(&cctx->lock, flags); 365 366 kfree(ctx->maps); 367 kfree(ctx->olaps); 368 kfree(ctx); 369 370 fastrpc_channel_ctx_put(cctx); 371 } 372 373 static void fastrpc_context_get(struct fastrpc_invoke_ctx *ctx) 374 { 375 kref_get(&ctx->refcount); 376 } 377 378 static void fastrpc_context_put(struct fastrpc_invoke_ctx *ctx) 379 { 380 kref_put(&ctx->refcount, fastrpc_context_free); 381 } 382 383 static void fastrpc_context_put_wq(struct work_struct *work) 384 { 385 struct fastrpc_invoke_ctx *ctx = 386 container_of(work, struct fastrpc_invoke_ctx, put_work); 387 388 fastrpc_context_put(ctx); 389 } 390 391 #define CMP(aa, bb) ((aa) == (bb) ? 0 : (aa) < (bb) ? -1 : 1) 392 static int olaps_cmp(const void *a, const void *b) 393 { 394 struct fastrpc_buf_overlap *pa = (struct fastrpc_buf_overlap *)a; 395 struct fastrpc_buf_overlap *pb = (struct fastrpc_buf_overlap *)b; 396 /* sort with lowest starting buffer first */ 397 int st = CMP(pa->start, pb->start); 398 /* sort with highest ending buffer first */ 399 int ed = CMP(pb->end, pa->end); 400 401 return st == 0 ? ed : st; 402 } 403 404 static void fastrpc_get_buff_overlaps(struct fastrpc_invoke_ctx *ctx) 405 { 406 u64 max_end = 0; 407 int i; 408 409 for (i = 0; i < ctx->nbufs; ++i) { 410 ctx->olaps[i].start = ctx->args[i].ptr; 411 ctx->olaps[i].end = ctx->olaps[i].start + ctx->args[i].length; 412 ctx->olaps[i].raix = i; 413 } 414 415 sort(ctx->olaps, ctx->nbufs, sizeof(*ctx->olaps), olaps_cmp, NULL); 416 417 for (i = 0; i < ctx->nbufs; ++i) { 418 /* Falling inside previous range */ 419 if (ctx->olaps[i].start < max_end) { 420 ctx->olaps[i].mstart = max_end; 421 ctx->olaps[i].mend = ctx->olaps[i].end; 422 ctx->olaps[i].offset = max_end - ctx->olaps[i].start; 423 424 if (ctx->olaps[i].end > max_end) { 425 max_end = ctx->olaps[i].end; 426 } else { 427 ctx->olaps[i].mend = 0; 428 ctx->olaps[i].mstart = 0; 429 } 430 431 } else { 432 ctx->olaps[i].mend = ctx->olaps[i].end; 433 ctx->olaps[i].mstart = ctx->olaps[i].start; 434 ctx->olaps[i].offset = 0; 435 max_end = ctx->olaps[i].end; 436 } 437 } 438 } 439 440 static struct fastrpc_invoke_ctx *fastrpc_context_alloc( 441 struct fastrpc_user *user, u32 kernel, u32 sc, 442 struct fastrpc_invoke_args *args) 443 { 444 struct fastrpc_channel_ctx *cctx = user->cctx; 445 struct fastrpc_invoke_ctx *ctx = NULL; 446 unsigned long flags; 447 int ret; 448 449 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 450 if (!ctx) 451 return ERR_PTR(-ENOMEM); 452 453 INIT_LIST_HEAD(&ctx->node); 454 ctx->fl = user; 455 ctx->nscalars = REMOTE_SCALARS_LENGTH(sc); 456 ctx->nbufs = REMOTE_SCALARS_INBUFS(sc) + 457 REMOTE_SCALARS_OUTBUFS(sc); 458 459 if (ctx->nscalars) { 460 ctx->maps = kcalloc(ctx->nscalars, 461 sizeof(*ctx->maps), GFP_KERNEL); 462 if (!ctx->maps) { 463 kfree(ctx); 464 return ERR_PTR(-ENOMEM); 465 } 466 ctx->olaps = kcalloc(ctx->nscalars, 467 sizeof(*ctx->olaps), GFP_KERNEL); 468 if (!ctx->olaps) { 469 kfree(ctx->maps); 470 kfree(ctx); 471 return ERR_PTR(-ENOMEM); 472 } 473 ctx->args = args; 474 fastrpc_get_buff_overlaps(ctx); 475 } 476 477 /* Released in fastrpc_context_put() */ 478 fastrpc_channel_ctx_get(cctx); 479 480 ctx->sc = sc; 481 ctx->retval = -1; 482 ctx->pid = current->pid; 483 ctx->tgid = user->tgid; 484 ctx->cctx = cctx; 485 init_completion(&ctx->work); 486 INIT_WORK(&ctx->put_work, fastrpc_context_put_wq); 487 488 spin_lock(&user->lock); 489 list_add_tail(&ctx->node, &user->pending); 490 spin_unlock(&user->lock); 491 492 spin_lock_irqsave(&cctx->lock, flags); 493 ret = idr_alloc_cyclic(&cctx->ctx_idr, ctx, 1, 494 FASTRPC_CTX_MAX, GFP_ATOMIC); 495 if (ret < 0) { 496 spin_unlock_irqrestore(&cctx->lock, flags); 497 goto err_idr; 498 } 499 ctx->ctxid = ret << 4; 500 spin_unlock_irqrestore(&cctx->lock, flags); 501 502 kref_init(&ctx->refcount); 503 504 return ctx; 505 err_idr: 506 spin_lock(&user->lock); 507 list_del(&ctx->node); 508 spin_unlock(&user->lock); 509 fastrpc_channel_ctx_put(cctx); 510 kfree(ctx->maps); 511 kfree(ctx->olaps); 512 kfree(ctx); 513 514 return ERR_PTR(ret); 515 } 516 517 static struct sg_table * 518 fastrpc_map_dma_buf(struct dma_buf_attachment *attachment, 519 enum dma_data_direction dir) 520 { 521 struct fastrpc_dma_buf_attachment *a = attachment->priv; 522 struct sg_table *table; 523 524 table = &a->sgt; 525 526 if (!dma_map_sgtable(attachment->dev, table, dir, 0)) 527 return ERR_PTR(-ENOMEM); 528 529 return table; 530 } 531 532 static void fastrpc_unmap_dma_buf(struct dma_buf_attachment *attach, 533 struct sg_table *table, 534 enum dma_data_direction dir) 535 { 536 dma_unmap_sgtable(attach->dev, table, dir, 0); 537 } 538 539 static void fastrpc_release(struct dma_buf *dmabuf) 540 { 541 struct fastrpc_buf *buffer = dmabuf->priv; 542 543 fastrpc_buf_free(buffer); 544 } 545 546 static int fastrpc_dma_buf_attach(struct dma_buf *dmabuf, 547 struct dma_buf_attachment *attachment) 548 { 549 struct fastrpc_dma_buf_attachment *a; 550 struct fastrpc_buf *buffer = dmabuf->priv; 551 int ret; 552 553 a = kzalloc(sizeof(*a), GFP_KERNEL); 554 if (!a) 555 return -ENOMEM; 556 557 ret = dma_get_sgtable(buffer->dev, &a->sgt, buffer->virt, 558 FASTRPC_PHYS(buffer->phys), buffer->size); 559 if (ret < 0) { 560 dev_err(buffer->dev, "failed to get scatterlist from DMA API\n"); 561 kfree(a); 562 return -EINVAL; 563 } 564 565 a->dev = attachment->dev; 566 INIT_LIST_HEAD(&a->node); 567 attachment->priv = a; 568 569 mutex_lock(&buffer->lock); 570 list_add(&a->node, &buffer->attachments); 571 mutex_unlock(&buffer->lock); 572 573 return 0; 574 } 575 576 static void fastrpc_dma_buf_detatch(struct dma_buf *dmabuf, 577 struct dma_buf_attachment *attachment) 578 { 579 struct fastrpc_dma_buf_attachment *a = attachment->priv; 580 struct fastrpc_buf *buffer = dmabuf->priv; 581 582 mutex_lock(&buffer->lock); 583 list_del(&a->node); 584 mutex_unlock(&buffer->lock); 585 sg_free_table(&a->sgt); 586 kfree(a); 587 } 588 589 static int fastrpc_vmap(struct dma_buf *dmabuf, struct dma_buf_map *map) 590 { 591 struct fastrpc_buf *buf = dmabuf->priv; 592 593 dma_buf_map_set_vaddr(map, buf->virt); 594 595 return 0; 596 } 597 598 static int fastrpc_mmap(struct dma_buf *dmabuf, 599 struct vm_area_struct *vma) 600 { 601 struct fastrpc_buf *buf = dmabuf->priv; 602 size_t size = vma->vm_end - vma->vm_start; 603 604 return dma_mmap_coherent(buf->dev, vma, buf->virt, 605 FASTRPC_PHYS(buf->phys), size); 606 } 607 608 static const struct dma_buf_ops fastrpc_dma_buf_ops = { 609 .attach = fastrpc_dma_buf_attach, 610 .detach = fastrpc_dma_buf_detatch, 611 .map_dma_buf = fastrpc_map_dma_buf, 612 .unmap_dma_buf = fastrpc_unmap_dma_buf, 613 .mmap = fastrpc_mmap, 614 .vmap = fastrpc_vmap, 615 .release = fastrpc_release, 616 }; 617 618 static int fastrpc_map_create(struct fastrpc_user *fl, int fd, 619 u64 len, struct fastrpc_map **ppmap) 620 { 621 struct fastrpc_session_ctx *sess = fl->sctx; 622 struct fastrpc_map *map = NULL; 623 int err = 0; 624 625 if (!fastrpc_map_find(fl, fd, ppmap)) 626 return 0; 627 628 map = kzalloc(sizeof(*map), GFP_KERNEL); 629 if (!map) 630 return -ENOMEM; 631 632 INIT_LIST_HEAD(&map->node); 633 map->fl = fl; 634 map->fd = fd; 635 map->buf = dma_buf_get(fd); 636 if (IS_ERR(map->buf)) { 637 err = PTR_ERR(map->buf); 638 goto get_err; 639 } 640 641 map->attach = dma_buf_attach(map->buf, sess->dev); 642 if (IS_ERR(map->attach)) { 643 dev_err(sess->dev, "Failed to attach dmabuf\n"); 644 err = PTR_ERR(map->attach); 645 goto attach_err; 646 } 647 648 map->table = dma_buf_map_attachment(map->attach, DMA_BIDIRECTIONAL); 649 if (IS_ERR(map->table)) { 650 err = PTR_ERR(map->table); 651 goto map_err; 652 } 653 654 map->phys = sg_dma_address(map->table->sgl); 655 map->phys += ((u64)fl->sctx->sid << 32); 656 map->size = len; 657 map->va = sg_virt(map->table->sgl); 658 map->len = len; 659 kref_init(&map->refcount); 660 661 spin_lock(&fl->lock); 662 list_add_tail(&map->node, &fl->maps); 663 spin_unlock(&fl->lock); 664 *ppmap = map; 665 666 return 0; 667 668 map_err: 669 dma_buf_detach(map->buf, map->attach); 670 attach_err: 671 dma_buf_put(map->buf); 672 get_err: 673 kfree(map); 674 675 return err; 676 } 677 678 /* 679 * Fastrpc payload buffer with metadata looks like: 680 * 681 * >>>>>> START of METADATA <<<<<<<<< 682 * +---------------------------------+ 683 * | Arguments | 684 * | type:(struct fastrpc_remote_arg)| 685 * | (0 - N) | 686 * +---------------------------------+ 687 * | Invoke Buffer list | 688 * | type:(struct fastrpc_invoke_buf)| 689 * | (0 - N) | 690 * +---------------------------------+ 691 * | Page info list | 692 * | type:(struct fastrpc_phy_page) | 693 * | (0 - N) | 694 * +---------------------------------+ 695 * | Optional info | 696 * |(can be specific to SoC/Firmware)| 697 * +---------------------------------+ 698 * >>>>>>>> END of METADATA <<<<<<<<< 699 * +---------------------------------+ 700 * | Inline ARGS | 701 * | (0-N) | 702 * +---------------------------------+ 703 */ 704 705 static int fastrpc_get_meta_size(struct fastrpc_invoke_ctx *ctx) 706 { 707 int size = 0; 708 709 size = (sizeof(struct fastrpc_remote_arg) + 710 sizeof(struct fastrpc_invoke_buf) + 711 sizeof(struct fastrpc_phy_page)) * ctx->nscalars + 712 sizeof(u64) * FASTRPC_MAX_FDLIST + 713 sizeof(u32) * FASTRPC_MAX_CRCLIST; 714 715 return size; 716 } 717 718 static u64 fastrpc_get_payload_size(struct fastrpc_invoke_ctx *ctx, int metalen) 719 { 720 u64 size = 0; 721 int i; 722 723 size = ALIGN(metalen, FASTRPC_ALIGN); 724 for (i = 0; i < ctx->nscalars; i++) { 725 if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1) { 726 727 if (ctx->olaps[i].offset == 0) 728 size = ALIGN(size, FASTRPC_ALIGN); 729 730 size += (ctx->olaps[i].mend - ctx->olaps[i].mstart); 731 } 732 } 733 734 return size; 735 } 736 737 static int fastrpc_create_maps(struct fastrpc_invoke_ctx *ctx) 738 { 739 struct device *dev = ctx->fl->sctx->dev; 740 int i, err; 741 742 for (i = 0; i < ctx->nscalars; ++i) { 743 /* Make sure reserved field is set to 0 */ 744 if (ctx->args[i].reserved) 745 return -EINVAL; 746 747 if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1 || 748 ctx->args[i].length == 0) 749 continue; 750 751 err = fastrpc_map_create(ctx->fl, ctx->args[i].fd, 752 ctx->args[i].length, &ctx->maps[i]); 753 if (err) { 754 dev_err(dev, "Error Creating map %d\n", err); 755 return -EINVAL; 756 } 757 758 } 759 return 0; 760 } 761 762 static int fastrpc_get_args(u32 kernel, struct fastrpc_invoke_ctx *ctx) 763 { 764 struct device *dev = ctx->fl->sctx->dev; 765 struct fastrpc_remote_arg *rpra; 766 struct fastrpc_invoke_buf *list; 767 struct fastrpc_phy_page *pages; 768 int inbufs, i, oix, err = 0; 769 u64 len, rlen, pkt_size; 770 u64 pg_start, pg_end; 771 uintptr_t args; 772 int metalen; 773 774 inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); 775 metalen = fastrpc_get_meta_size(ctx); 776 pkt_size = fastrpc_get_payload_size(ctx, metalen); 777 778 err = fastrpc_create_maps(ctx); 779 if (err) 780 return err; 781 782 ctx->msg_sz = pkt_size; 783 784 err = fastrpc_buf_alloc(ctx->fl, dev, pkt_size, &ctx->buf); 785 if (err) 786 return err; 787 788 rpra = ctx->buf->virt; 789 list = ctx->buf->virt + ctx->nscalars * sizeof(*rpra); 790 pages = ctx->buf->virt + ctx->nscalars * (sizeof(*list) + 791 sizeof(*rpra)); 792 args = (uintptr_t)ctx->buf->virt + metalen; 793 rlen = pkt_size - metalen; 794 ctx->rpra = rpra; 795 796 for (oix = 0; oix < ctx->nbufs; ++oix) { 797 int mlen; 798 799 i = ctx->olaps[oix].raix; 800 len = ctx->args[i].length; 801 802 rpra[i].pv = 0; 803 rpra[i].len = len; 804 list[i].num = len ? 1 : 0; 805 list[i].pgidx = i; 806 807 if (!len) 808 continue; 809 810 if (ctx->maps[i]) { 811 struct vm_area_struct *vma = NULL; 812 813 rpra[i].pv = (u64) ctx->args[i].ptr; 814 pages[i].addr = ctx->maps[i]->phys; 815 816 vma = find_vma(current->mm, ctx->args[i].ptr); 817 if (vma) 818 pages[i].addr += ctx->args[i].ptr - 819 vma->vm_start; 820 821 pg_start = (ctx->args[i].ptr & PAGE_MASK) >> PAGE_SHIFT; 822 pg_end = ((ctx->args[i].ptr + len - 1) & PAGE_MASK) >> 823 PAGE_SHIFT; 824 pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; 825 826 } else { 827 828 if (ctx->olaps[oix].offset == 0) { 829 rlen -= ALIGN(args, FASTRPC_ALIGN) - args; 830 args = ALIGN(args, FASTRPC_ALIGN); 831 } 832 833 mlen = ctx->olaps[oix].mend - ctx->olaps[oix].mstart; 834 835 if (rlen < mlen) 836 goto bail; 837 838 rpra[i].pv = args - ctx->olaps[oix].offset; 839 pages[i].addr = ctx->buf->phys - 840 ctx->olaps[oix].offset + 841 (pkt_size - rlen); 842 pages[i].addr = pages[i].addr & PAGE_MASK; 843 844 pg_start = (args & PAGE_MASK) >> PAGE_SHIFT; 845 pg_end = ((args + len - 1) & PAGE_MASK) >> PAGE_SHIFT; 846 pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; 847 args = args + mlen; 848 rlen -= mlen; 849 } 850 851 if (i < inbufs && !ctx->maps[i]) { 852 void *dst = (void *)(uintptr_t)rpra[i].pv; 853 void *src = (void *)(uintptr_t)ctx->args[i].ptr; 854 855 if (!kernel) { 856 if (copy_from_user(dst, (void __user *)src, 857 len)) { 858 err = -EFAULT; 859 goto bail; 860 } 861 } else { 862 memcpy(dst, src, len); 863 } 864 } 865 } 866 867 for (i = ctx->nbufs; i < ctx->nscalars; ++i) { 868 rpra[i].pv = (u64) ctx->args[i].ptr; 869 rpra[i].len = ctx->args[i].length; 870 list[i].num = ctx->args[i].length ? 1 : 0; 871 list[i].pgidx = i; 872 pages[i].addr = ctx->maps[i]->phys; 873 pages[i].size = ctx->maps[i]->size; 874 } 875 876 bail: 877 if (err) 878 dev_err(dev, "Error: get invoke args failed:%d\n", err); 879 880 return err; 881 } 882 883 static int fastrpc_put_args(struct fastrpc_invoke_ctx *ctx, 884 u32 kernel) 885 { 886 struct fastrpc_remote_arg *rpra = ctx->rpra; 887 int i, inbufs; 888 889 inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); 890 891 for (i = inbufs; i < ctx->nbufs; ++i) { 892 void *src = (void *)(uintptr_t)rpra[i].pv; 893 void *dst = (void *)(uintptr_t)ctx->args[i].ptr; 894 u64 len = rpra[i].len; 895 896 if (!kernel) { 897 if (copy_to_user((void __user *)dst, src, len)) 898 return -EFAULT; 899 } else { 900 memcpy(dst, src, len); 901 } 902 } 903 904 return 0; 905 } 906 907 static int fastrpc_invoke_send(struct fastrpc_session_ctx *sctx, 908 struct fastrpc_invoke_ctx *ctx, 909 u32 kernel, uint32_t handle) 910 { 911 struct fastrpc_channel_ctx *cctx; 912 struct fastrpc_user *fl = ctx->fl; 913 struct fastrpc_msg *msg = &ctx->msg; 914 int ret; 915 916 cctx = fl->cctx; 917 msg->pid = fl->tgid; 918 msg->tid = current->pid; 919 920 if (kernel) 921 msg->pid = 0; 922 923 msg->ctx = ctx->ctxid | fl->pd; 924 msg->handle = handle; 925 msg->sc = ctx->sc; 926 msg->addr = ctx->buf ? ctx->buf->phys : 0; 927 msg->size = roundup(ctx->msg_sz, PAGE_SIZE); 928 fastrpc_context_get(ctx); 929 930 ret = rpmsg_send(cctx->rpdev->ept, (void *)msg, sizeof(*msg)); 931 932 if (ret) 933 fastrpc_context_put(ctx); 934 935 return ret; 936 937 } 938 939 static int fastrpc_internal_invoke(struct fastrpc_user *fl, u32 kernel, 940 u32 handle, u32 sc, 941 struct fastrpc_invoke_args *args) 942 { 943 struct fastrpc_invoke_ctx *ctx = NULL; 944 int err = 0; 945 946 if (!fl->sctx) 947 return -EINVAL; 948 949 if (!fl->cctx->rpdev) 950 return -EPIPE; 951 952 ctx = fastrpc_context_alloc(fl, kernel, sc, args); 953 if (IS_ERR(ctx)) 954 return PTR_ERR(ctx); 955 956 if (ctx->nscalars) { 957 err = fastrpc_get_args(kernel, ctx); 958 if (err) 959 goto bail; 960 } 961 962 /* make sure that all CPU memory writes are seen by DSP */ 963 dma_wmb(); 964 /* Send invoke buffer to remote dsp */ 965 err = fastrpc_invoke_send(fl->sctx, ctx, kernel, handle); 966 if (err) 967 goto bail; 968 969 if (kernel) { 970 if (!wait_for_completion_timeout(&ctx->work, 10 * HZ)) 971 err = -ETIMEDOUT; 972 } else { 973 err = wait_for_completion_interruptible(&ctx->work); 974 } 975 976 if (err) 977 goto bail; 978 979 /* Check the response from remote dsp */ 980 err = ctx->retval; 981 if (err) 982 goto bail; 983 984 if (ctx->nscalars) { 985 /* make sure that all memory writes by DSP are seen by CPU */ 986 dma_rmb(); 987 /* populate all the output buffers with results */ 988 err = fastrpc_put_args(ctx, kernel); 989 if (err) 990 goto bail; 991 } 992 993 bail: 994 if (err != -ERESTARTSYS && err != -ETIMEDOUT) { 995 /* We are done with this compute context */ 996 spin_lock(&fl->lock); 997 list_del(&ctx->node); 998 spin_unlock(&fl->lock); 999 fastrpc_context_put(ctx); 1000 } 1001 if (err) 1002 dev_dbg(fl->sctx->dev, "Error: Invoke Failed %d\n", err); 1003 1004 return err; 1005 } 1006 1007 static int fastrpc_init_create_process(struct fastrpc_user *fl, 1008 char __user *argp) 1009 { 1010 struct fastrpc_init_create init; 1011 struct fastrpc_invoke_args *args; 1012 struct fastrpc_phy_page pages[1]; 1013 struct fastrpc_map *map = NULL; 1014 struct fastrpc_buf *imem = NULL; 1015 int memlen; 1016 int err; 1017 struct { 1018 int pgid; 1019 u32 namelen; 1020 u32 filelen; 1021 u32 pageslen; 1022 u32 attrs; 1023 u32 siglen; 1024 } inbuf; 1025 u32 sc; 1026 1027 args = kcalloc(FASTRPC_CREATE_PROCESS_NARGS, sizeof(*args), GFP_KERNEL); 1028 if (!args) 1029 return -ENOMEM; 1030 1031 if (copy_from_user(&init, argp, sizeof(init))) { 1032 err = -EFAULT; 1033 goto err; 1034 } 1035 1036 if (init.filelen > INIT_FILELEN_MAX) { 1037 err = -EINVAL; 1038 goto err; 1039 } 1040 1041 inbuf.pgid = fl->tgid; 1042 inbuf.namelen = strlen(current->comm) + 1; 1043 inbuf.filelen = init.filelen; 1044 inbuf.pageslen = 1; 1045 inbuf.attrs = init.attrs; 1046 inbuf.siglen = init.siglen; 1047 fl->pd = USER_PD; 1048 1049 if (init.filelen && init.filefd) { 1050 err = fastrpc_map_create(fl, init.filefd, init.filelen, &map); 1051 if (err) 1052 goto err; 1053 } 1054 1055 memlen = ALIGN(max(INIT_FILELEN_MAX, (int)init.filelen * 4), 1056 1024 * 1024); 1057 err = fastrpc_buf_alloc(fl, fl->sctx->dev, memlen, 1058 &imem); 1059 if (err) 1060 goto err_alloc; 1061 1062 fl->init_mem = imem; 1063 args[0].ptr = (u64)(uintptr_t)&inbuf; 1064 args[0].length = sizeof(inbuf); 1065 args[0].fd = -1; 1066 1067 args[1].ptr = (u64)(uintptr_t)current->comm; 1068 args[1].length = inbuf.namelen; 1069 args[1].fd = -1; 1070 1071 args[2].ptr = (u64) init.file; 1072 args[2].length = inbuf.filelen; 1073 args[2].fd = init.filefd; 1074 1075 pages[0].addr = imem->phys; 1076 pages[0].size = imem->size; 1077 1078 args[3].ptr = (u64)(uintptr_t) pages; 1079 args[3].length = 1 * sizeof(*pages); 1080 args[3].fd = -1; 1081 1082 args[4].ptr = (u64)(uintptr_t)&inbuf.attrs; 1083 args[4].length = sizeof(inbuf.attrs); 1084 args[4].fd = -1; 1085 1086 args[5].ptr = (u64)(uintptr_t) &inbuf.siglen; 1087 args[5].length = sizeof(inbuf.siglen); 1088 args[5].fd = -1; 1089 1090 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE, 4, 0); 1091 if (init.attrs) 1092 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE_ATTR, 6, 0); 1093 1094 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1095 sc, args); 1096 if (err) 1097 goto err_invoke; 1098 1099 kfree(args); 1100 1101 return 0; 1102 1103 err_invoke: 1104 fl->init_mem = NULL; 1105 fastrpc_buf_free(imem); 1106 err_alloc: 1107 if (map) { 1108 spin_lock(&fl->lock); 1109 list_del(&map->node); 1110 spin_unlock(&fl->lock); 1111 fastrpc_map_put(map); 1112 } 1113 err: 1114 kfree(args); 1115 1116 return err; 1117 } 1118 1119 static struct fastrpc_session_ctx *fastrpc_session_alloc( 1120 struct fastrpc_channel_ctx *cctx) 1121 { 1122 struct fastrpc_session_ctx *session = NULL; 1123 unsigned long flags; 1124 int i; 1125 1126 spin_lock_irqsave(&cctx->lock, flags); 1127 for (i = 0; i < cctx->sesscount; i++) { 1128 if (!cctx->session[i].used && cctx->session[i].valid) { 1129 cctx->session[i].used = true; 1130 session = &cctx->session[i]; 1131 break; 1132 } 1133 } 1134 spin_unlock_irqrestore(&cctx->lock, flags); 1135 1136 return session; 1137 } 1138 1139 static void fastrpc_session_free(struct fastrpc_channel_ctx *cctx, 1140 struct fastrpc_session_ctx *session) 1141 { 1142 unsigned long flags; 1143 1144 spin_lock_irqsave(&cctx->lock, flags); 1145 session->used = false; 1146 spin_unlock_irqrestore(&cctx->lock, flags); 1147 } 1148 1149 static int fastrpc_release_current_dsp_process(struct fastrpc_user *fl) 1150 { 1151 struct fastrpc_invoke_args args[1]; 1152 int tgid = 0; 1153 u32 sc; 1154 1155 tgid = fl->tgid; 1156 args[0].ptr = (u64)(uintptr_t) &tgid; 1157 args[0].length = sizeof(tgid); 1158 args[0].fd = -1; 1159 args[0].reserved = 0; 1160 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_RELEASE, 1, 0); 1161 1162 return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1163 sc, &args[0]); 1164 } 1165 1166 static int fastrpc_device_release(struct inode *inode, struct file *file) 1167 { 1168 struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; 1169 struct fastrpc_channel_ctx *cctx = fl->cctx; 1170 struct fastrpc_invoke_ctx *ctx, *n; 1171 struct fastrpc_map *map, *m; 1172 struct fastrpc_buf *buf, *b; 1173 unsigned long flags; 1174 1175 fastrpc_release_current_dsp_process(fl); 1176 1177 spin_lock_irqsave(&cctx->lock, flags); 1178 list_del(&fl->user); 1179 spin_unlock_irqrestore(&cctx->lock, flags); 1180 1181 if (fl->init_mem) 1182 fastrpc_buf_free(fl->init_mem); 1183 1184 list_for_each_entry_safe(ctx, n, &fl->pending, node) { 1185 list_del(&ctx->node); 1186 fastrpc_context_put(ctx); 1187 } 1188 1189 list_for_each_entry_safe(map, m, &fl->maps, node) { 1190 list_del(&map->node); 1191 fastrpc_map_put(map); 1192 } 1193 1194 list_for_each_entry_safe(buf, b, &fl->mmaps, node) { 1195 list_del(&buf->node); 1196 fastrpc_buf_free(buf); 1197 } 1198 1199 fastrpc_session_free(cctx, fl->sctx); 1200 fastrpc_channel_ctx_put(cctx); 1201 1202 mutex_destroy(&fl->mutex); 1203 kfree(fl); 1204 file->private_data = NULL; 1205 1206 return 0; 1207 } 1208 1209 static int fastrpc_device_open(struct inode *inode, struct file *filp) 1210 { 1211 struct fastrpc_channel_ctx *cctx = miscdev_to_cctx(filp->private_data); 1212 struct fastrpc_user *fl = NULL; 1213 unsigned long flags; 1214 1215 fl = kzalloc(sizeof(*fl), GFP_KERNEL); 1216 if (!fl) 1217 return -ENOMEM; 1218 1219 /* Released in fastrpc_device_release() */ 1220 fastrpc_channel_ctx_get(cctx); 1221 1222 filp->private_data = fl; 1223 spin_lock_init(&fl->lock); 1224 mutex_init(&fl->mutex); 1225 INIT_LIST_HEAD(&fl->pending); 1226 INIT_LIST_HEAD(&fl->maps); 1227 INIT_LIST_HEAD(&fl->mmaps); 1228 INIT_LIST_HEAD(&fl->user); 1229 fl->tgid = current->tgid; 1230 fl->cctx = cctx; 1231 1232 fl->sctx = fastrpc_session_alloc(cctx); 1233 if (!fl->sctx) { 1234 dev_err(&cctx->rpdev->dev, "No session available\n"); 1235 mutex_destroy(&fl->mutex); 1236 kfree(fl); 1237 1238 return -EBUSY; 1239 } 1240 1241 spin_lock_irqsave(&cctx->lock, flags); 1242 list_add_tail(&fl->user, &cctx->users); 1243 spin_unlock_irqrestore(&cctx->lock, flags); 1244 1245 return 0; 1246 } 1247 1248 static int fastrpc_dmabuf_alloc(struct fastrpc_user *fl, char __user *argp) 1249 { 1250 struct fastrpc_alloc_dma_buf bp; 1251 DEFINE_DMA_BUF_EXPORT_INFO(exp_info); 1252 struct fastrpc_buf *buf = NULL; 1253 int err; 1254 1255 if (copy_from_user(&bp, argp, sizeof(bp))) 1256 return -EFAULT; 1257 1258 err = fastrpc_buf_alloc(fl, fl->sctx->dev, bp.size, &buf); 1259 if (err) 1260 return err; 1261 exp_info.ops = &fastrpc_dma_buf_ops; 1262 exp_info.size = bp.size; 1263 exp_info.flags = O_RDWR; 1264 exp_info.priv = buf; 1265 buf->dmabuf = dma_buf_export(&exp_info); 1266 if (IS_ERR(buf->dmabuf)) { 1267 err = PTR_ERR(buf->dmabuf); 1268 fastrpc_buf_free(buf); 1269 return err; 1270 } 1271 1272 bp.fd = dma_buf_fd(buf->dmabuf, O_ACCMODE); 1273 if (bp.fd < 0) { 1274 dma_buf_put(buf->dmabuf); 1275 return -EINVAL; 1276 } 1277 1278 if (copy_to_user(argp, &bp, sizeof(bp))) { 1279 dma_buf_put(buf->dmabuf); 1280 return -EFAULT; 1281 } 1282 1283 return 0; 1284 } 1285 1286 static int fastrpc_init_attach(struct fastrpc_user *fl, int pd) 1287 { 1288 struct fastrpc_invoke_args args[1]; 1289 int tgid = fl->tgid; 1290 u32 sc; 1291 1292 args[0].ptr = (u64)(uintptr_t) &tgid; 1293 args[0].length = sizeof(tgid); 1294 args[0].fd = -1; 1295 args[0].reserved = 0; 1296 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_ATTACH, 1, 0); 1297 fl->pd = pd; 1298 1299 return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1300 sc, &args[0]); 1301 } 1302 1303 static int fastrpc_invoke(struct fastrpc_user *fl, char __user *argp) 1304 { 1305 struct fastrpc_invoke_args *args = NULL; 1306 struct fastrpc_invoke inv; 1307 u32 nscalars; 1308 int err; 1309 1310 if (copy_from_user(&inv, argp, sizeof(inv))) 1311 return -EFAULT; 1312 1313 /* nscalars is truncated here to max supported value */ 1314 nscalars = REMOTE_SCALARS_LENGTH(inv.sc); 1315 if (nscalars) { 1316 args = kcalloc(nscalars, sizeof(*args), GFP_KERNEL); 1317 if (!args) 1318 return -ENOMEM; 1319 1320 if (copy_from_user(args, (void __user *)(uintptr_t)inv.args, 1321 nscalars * sizeof(*args))) { 1322 kfree(args); 1323 return -EFAULT; 1324 } 1325 } 1326 1327 err = fastrpc_internal_invoke(fl, false, inv.handle, inv.sc, args); 1328 kfree(args); 1329 1330 return err; 1331 } 1332 1333 static int fastrpc_req_munmap_impl(struct fastrpc_user *fl, 1334 struct fastrpc_req_munmap *req) 1335 { 1336 struct fastrpc_invoke_args args[1] = { [0] = { 0 } }; 1337 struct fastrpc_buf *buf, *b; 1338 struct fastrpc_munmap_req_msg req_msg; 1339 struct device *dev = fl->sctx->dev; 1340 int err; 1341 u32 sc; 1342 1343 spin_lock(&fl->lock); 1344 list_for_each_entry_safe(buf, b, &fl->mmaps, node) { 1345 if ((buf->raddr == req->vaddrout) && (buf->size == req->size)) 1346 break; 1347 buf = NULL; 1348 } 1349 spin_unlock(&fl->lock); 1350 1351 if (!buf) { 1352 dev_err(dev, "mmap not in list\n"); 1353 return -EINVAL; 1354 } 1355 1356 req_msg.pgid = fl->tgid; 1357 req_msg.size = buf->size; 1358 req_msg.vaddr = buf->raddr; 1359 1360 args[0].ptr = (u64) (uintptr_t) &req_msg; 1361 args[0].length = sizeof(req_msg); 1362 1363 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MUNMAP, 1, 0); 1364 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, 1365 &args[0]); 1366 if (!err) { 1367 dev_dbg(dev, "unmmap\tpt 0x%09lx OK\n", buf->raddr); 1368 spin_lock(&fl->lock); 1369 list_del(&buf->node); 1370 spin_unlock(&fl->lock); 1371 fastrpc_buf_free(buf); 1372 } else { 1373 dev_err(dev, "unmmap\tpt 0x%09lx ERROR\n", buf->raddr); 1374 } 1375 1376 return err; 1377 } 1378 1379 static int fastrpc_req_munmap(struct fastrpc_user *fl, char __user *argp) 1380 { 1381 struct fastrpc_req_munmap req; 1382 1383 if (copy_from_user(&req, argp, sizeof(req))) 1384 return -EFAULT; 1385 1386 return fastrpc_req_munmap_impl(fl, &req); 1387 } 1388 1389 static int fastrpc_req_mmap(struct fastrpc_user *fl, char __user *argp) 1390 { 1391 struct fastrpc_invoke_args args[3] = { [0 ... 2] = { 0 } }; 1392 struct fastrpc_buf *buf = NULL; 1393 struct fastrpc_mmap_req_msg req_msg; 1394 struct fastrpc_mmap_rsp_msg rsp_msg; 1395 struct fastrpc_req_munmap req_unmap; 1396 struct fastrpc_phy_page pages; 1397 struct fastrpc_req_mmap req; 1398 struct device *dev = fl->sctx->dev; 1399 int err; 1400 u32 sc; 1401 1402 if (copy_from_user(&req, argp, sizeof(req))) 1403 return -EFAULT; 1404 1405 if (req.flags != ADSP_MMAP_ADD_PAGES) { 1406 dev_err(dev, "flag not supported 0x%x\n", req.flags); 1407 return -EINVAL; 1408 } 1409 1410 if (req.vaddrin) { 1411 dev_err(dev, "adding user allocated pages is not supported\n"); 1412 return -EINVAL; 1413 } 1414 1415 err = fastrpc_buf_alloc(fl, fl->sctx->dev, req.size, &buf); 1416 if (err) { 1417 dev_err(dev, "failed to allocate buffer\n"); 1418 return err; 1419 } 1420 1421 req_msg.pgid = fl->tgid; 1422 req_msg.flags = req.flags; 1423 req_msg.vaddr = req.vaddrin; 1424 req_msg.num = sizeof(pages); 1425 1426 args[0].ptr = (u64) (uintptr_t) &req_msg; 1427 args[0].length = sizeof(req_msg); 1428 1429 pages.addr = buf->phys; 1430 pages.size = buf->size; 1431 1432 args[1].ptr = (u64) (uintptr_t) &pages; 1433 args[1].length = sizeof(pages); 1434 1435 args[2].ptr = (u64) (uintptr_t) &rsp_msg; 1436 args[2].length = sizeof(rsp_msg); 1437 1438 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MMAP, 2, 1); 1439 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, 1440 &args[0]); 1441 if (err) { 1442 dev_err(dev, "mmap error (len 0x%08llx)\n", buf->size); 1443 goto err_invoke; 1444 } 1445 1446 /* update the buffer to be able to deallocate the memory on the DSP */ 1447 buf->raddr = (uintptr_t) rsp_msg.vaddr; 1448 1449 /* let the client know the address to use */ 1450 req.vaddrout = rsp_msg.vaddr; 1451 1452 spin_lock(&fl->lock); 1453 list_add_tail(&buf->node, &fl->mmaps); 1454 spin_unlock(&fl->lock); 1455 1456 if (copy_to_user((void __user *)argp, &req, sizeof(req))) { 1457 /* unmap the memory and release the buffer */ 1458 req_unmap.vaddrout = buf->raddr; 1459 req_unmap.size = buf->size; 1460 fastrpc_req_munmap_impl(fl, &req_unmap); 1461 return -EFAULT; 1462 } 1463 1464 dev_dbg(dev, "mmap\t\tpt 0x%09lx OK [len 0x%08llx]\n", 1465 buf->raddr, buf->size); 1466 1467 return 0; 1468 1469 err_invoke: 1470 fastrpc_buf_free(buf); 1471 1472 return err; 1473 } 1474 1475 static long fastrpc_device_ioctl(struct file *file, unsigned int cmd, 1476 unsigned long arg) 1477 { 1478 struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; 1479 char __user *argp = (char __user *)arg; 1480 int err; 1481 1482 switch (cmd) { 1483 case FASTRPC_IOCTL_INVOKE: 1484 err = fastrpc_invoke(fl, argp); 1485 break; 1486 case FASTRPC_IOCTL_INIT_ATTACH: 1487 err = fastrpc_init_attach(fl, AUDIO_PD); 1488 break; 1489 case FASTRPC_IOCTL_INIT_ATTACH_SNS: 1490 err = fastrpc_init_attach(fl, SENSORS_PD); 1491 break; 1492 case FASTRPC_IOCTL_INIT_CREATE: 1493 err = fastrpc_init_create_process(fl, argp); 1494 break; 1495 case FASTRPC_IOCTL_ALLOC_DMA_BUFF: 1496 err = fastrpc_dmabuf_alloc(fl, argp); 1497 break; 1498 case FASTRPC_IOCTL_MMAP: 1499 err = fastrpc_req_mmap(fl, argp); 1500 break; 1501 case FASTRPC_IOCTL_MUNMAP: 1502 err = fastrpc_req_munmap(fl, argp); 1503 break; 1504 default: 1505 err = -ENOTTY; 1506 break; 1507 } 1508 1509 return err; 1510 } 1511 1512 static const struct file_operations fastrpc_fops = { 1513 .open = fastrpc_device_open, 1514 .release = fastrpc_device_release, 1515 .unlocked_ioctl = fastrpc_device_ioctl, 1516 .compat_ioctl = fastrpc_device_ioctl, 1517 }; 1518 1519 static int fastrpc_cb_probe(struct platform_device *pdev) 1520 { 1521 struct fastrpc_channel_ctx *cctx; 1522 struct fastrpc_session_ctx *sess; 1523 struct device *dev = &pdev->dev; 1524 int i, sessions = 0; 1525 unsigned long flags; 1526 int rc; 1527 1528 cctx = dev_get_drvdata(dev->parent); 1529 if (!cctx) 1530 return -EINVAL; 1531 1532 of_property_read_u32(dev->of_node, "qcom,nsessions", &sessions); 1533 1534 spin_lock_irqsave(&cctx->lock, flags); 1535 sess = &cctx->session[cctx->sesscount]; 1536 sess->used = false; 1537 sess->valid = true; 1538 sess->dev = dev; 1539 dev_set_drvdata(dev, sess); 1540 1541 if (of_property_read_u32(dev->of_node, "reg", &sess->sid)) 1542 dev_info(dev, "FastRPC Session ID not specified in DT\n"); 1543 1544 if (sessions > 0) { 1545 struct fastrpc_session_ctx *dup_sess; 1546 1547 for (i = 1; i < sessions; i++) { 1548 if (cctx->sesscount++ >= FASTRPC_MAX_SESSIONS) 1549 break; 1550 dup_sess = &cctx->session[cctx->sesscount]; 1551 memcpy(dup_sess, sess, sizeof(*dup_sess)); 1552 } 1553 } 1554 cctx->sesscount++; 1555 spin_unlock_irqrestore(&cctx->lock, flags); 1556 rc = dma_set_mask(dev, DMA_BIT_MASK(32)); 1557 if (rc) { 1558 dev_err(dev, "32-bit DMA enable failed\n"); 1559 return rc; 1560 } 1561 1562 return 0; 1563 } 1564 1565 static int fastrpc_cb_remove(struct platform_device *pdev) 1566 { 1567 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(pdev->dev.parent); 1568 struct fastrpc_session_ctx *sess = dev_get_drvdata(&pdev->dev); 1569 unsigned long flags; 1570 int i; 1571 1572 spin_lock_irqsave(&cctx->lock, flags); 1573 for (i = 1; i < FASTRPC_MAX_SESSIONS; i++) { 1574 if (cctx->session[i].sid == sess->sid) { 1575 cctx->session[i].valid = false; 1576 cctx->sesscount--; 1577 } 1578 } 1579 spin_unlock_irqrestore(&cctx->lock, flags); 1580 1581 return 0; 1582 } 1583 1584 static const struct of_device_id fastrpc_match_table[] = { 1585 { .compatible = "qcom,fastrpc-compute-cb", }, 1586 {} 1587 }; 1588 1589 static struct platform_driver fastrpc_cb_driver = { 1590 .probe = fastrpc_cb_probe, 1591 .remove = fastrpc_cb_remove, 1592 .driver = { 1593 .name = "qcom,fastrpc-cb", 1594 .of_match_table = fastrpc_match_table, 1595 .suppress_bind_attrs = true, 1596 }, 1597 }; 1598 1599 static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev) 1600 { 1601 struct device *rdev = &rpdev->dev; 1602 struct fastrpc_channel_ctx *data; 1603 int i, err, domain_id = -1; 1604 const char *domain; 1605 1606 err = of_property_read_string(rdev->of_node, "label", &domain); 1607 if (err) { 1608 dev_info(rdev, "FastRPC Domain not specified in DT\n"); 1609 return err; 1610 } 1611 1612 for (i = 0; i <= CDSP_DOMAIN_ID; i++) { 1613 if (!strcmp(domains[i], domain)) { 1614 domain_id = i; 1615 break; 1616 } 1617 } 1618 1619 if (domain_id < 0) { 1620 dev_info(rdev, "FastRPC Invalid Domain ID %d\n", domain_id); 1621 return -EINVAL; 1622 } 1623 1624 data = kzalloc(sizeof(*data), GFP_KERNEL); 1625 if (!data) 1626 return -ENOMEM; 1627 1628 data->miscdev.minor = MISC_DYNAMIC_MINOR; 1629 data->miscdev.name = devm_kasprintf(rdev, GFP_KERNEL, "fastrpc-%s", 1630 domains[domain_id]); 1631 data->miscdev.fops = &fastrpc_fops; 1632 err = misc_register(&data->miscdev); 1633 if (err) { 1634 kfree(data); 1635 return err; 1636 } 1637 1638 kref_init(&data->refcount); 1639 1640 dev_set_drvdata(&rpdev->dev, data); 1641 dma_set_mask_and_coherent(rdev, DMA_BIT_MASK(32)); 1642 INIT_LIST_HEAD(&data->users); 1643 spin_lock_init(&data->lock); 1644 idr_init(&data->ctx_idr); 1645 data->domain_id = domain_id; 1646 data->rpdev = rpdev; 1647 1648 return of_platform_populate(rdev->of_node, NULL, NULL, rdev); 1649 } 1650 1651 static void fastrpc_notify_users(struct fastrpc_user *user) 1652 { 1653 struct fastrpc_invoke_ctx *ctx; 1654 1655 spin_lock(&user->lock); 1656 list_for_each_entry(ctx, &user->pending, node) 1657 complete(&ctx->work); 1658 spin_unlock(&user->lock); 1659 } 1660 1661 static void fastrpc_rpmsg_remove(struct rpmsg_device *rpdev) 1662 { 1663 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); 1664 struct fastrpc_user *user; 1665 unsigned long flags; 1666 1667 spin_lock_irqsave(&cctx->lock, flags); 1668 list_for_each_entry(user, &cctx->users, user) 1669 fastrpc_notify_users(user); 1670 spin_unlock_irqrestore(&cctx->lock, flags); 1671 1672 misc_deregister(&cctx->miscdev); 1673 of_platform_depopulate(&rpdev->dev); 1674 1675 cctx->rpdev = NULL; 1676 fastrpc_channel_ctx_put(cctx); 1677 } 1678 1679 static int fastrpc_rpmsg_callback(struct rpmsg_device *rpdev, void *data, 1680 int len, void *priv, u32 addr) 1681 { 1682 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); 1683 struct fastrpc_invoke_rsp *rsp = data; 1684 struct fastrpc_invoke_ctx *ctx; 1685 unsigned long flags; 1686 unsigned long ctxid; 1687 1688 if (len < sizeof(*rsp)) 1689 return -EINVAL; 1690 1691 ctxid = ((rsp->ctx & FASTRPC_CTXID_MASK) >> 4); 1692 1693 spin_lock_irqsave(&cctx->lock, flags); 1694 ctx = idr_find(&cctx->ctx_idr, ctxid); 1695 spin_unlock_irqrestore(&cctx->lock, flags); 1696 1697 if (!ctx) { 1698 dev_err(&rpdev->dev, "No context ID matches response\n"); 1699 return -ENOENT; 1700 } 1701 1702 ctx->retval = rsp->retval; 1703 complete(&ctx->work); 1704 1705 /* 1706 * The DMA buffer associated with the context cannot be freed in 1707 * interrupt context so schedule it through a worker thread to 1708 * avoid a kernel BUG. 1709 */ 1710 schedule_work(&ctx->put_work); 1711 1712 return 0; 1713 } 1714 1715 static const struct of_device_id fastrpc_rpmsg_of_match[] = { 1716 { .compatible = "qcom,fastrpc" }, 1717 { }, 1718 }; 1719 MODULE_DEVICE_TABLE(of, fastrpc_rpmsg_of_match); 1720 1721 static struct rpmsg_driver fastrpc_driver = { 1722 .probe = fastrpc_rpmsg_probe, 1723 .remove = fastrpc_rpmsg_remove, 1724 .callback = fastrpc_rpmsg_callback, 1725 .drv = { 1726 .name = "qcom,fastrpc", 1727 .of_match_table = fastrpc_rpmsg_of_match, 1728 }, 1729 }; 1730 1731 static int fastrpc_init(void) 1732 { 1733 int ret; 1734 1735 ret = platform_driver_register(&fastrpc_cb_driver); 1736 if (ret < 0) { 1737 pr_err("fastrpc: failed to register cb driver\n"); 1738 return ret; 1739 } 1740 1741 ret = register_rpmsg_driver(&fastrpc_driver); 1742 if (ret < 0) { 1743 pr_err("fastrpc: failed to register rpmsg driver\n"); 1744 platform_driver_unregister(&fastrpc_cb_driver); 1745 return ret; 1746 } 1747 1748 return 0; 1749 } 1750 module_init(fastrpc_init); 1751 1752 static void fastrpc_exit(void) 1753 { 1754 platform_driver_unregister(&fastrpc_cb_driver); 1755 unregister_rpmsg_driver(&fastrpc_driver); 1756 } 1757 module_exit(fastrpc_exit); 1758 1759 MODULE_LICENSE("GPL v2"); 1760