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 void *fastrpc_vmap(struct dma_buf *dmabuf) 590 { 591 struct fastrpc_buf *buf = dmabuf->priv; 592 593 return buf->virt; 594 } 595 596 static int fastrpc_mmap(struct dma_buf *dmabuf, 597 struct vm_area_struct *vma) 598 { 599 struct fastrpc_buf *buf = dmabuf->priv; 600 size_t size = vma->vm_end - vma->vm_start; 601 602 return dma_mmap_coherent(buf->dev, vma, buf->virt, 603 FASTRPC_PHYS(buf->phys), size); 604 } 605 606 static const struct dma_buf_ops fastrpc_dma_buf_ops = { 607 .attach = fastrpc_dma_buf_attach, 608 .detach = fastrpc_dma_buf_detatch, 609 .map_dma_buf = fastrpc_map_dma_buf, 610 .unmap_dma_buf = fastrpc_unmap_dma_buf, 611 .mmap = fastrpc_mmap, 612 .vmap = fastrpc_vmap, 613 .release = fastrpc_release, 614 }; 615 616 static int fastrpc_map_create(struct fastrpc_user *fl, int fd, 617 u64 len, struct fastrpc_map **ppmap) 618 { 619 struct fastrpc_session_ctx *sess = fl->sctx; 620 struct fastrpc_map *map = NULL; 621 int err = 0; 622 623 if (!fastrpc_map_find(fl, fd, ppmap)) 624 return 0; 625 626 map = kzalloc(sizeof(*map), GFP_KERNEL); 627 if (!map) 628 return -ENOMEM; 629 630 INIT_LIST_HEAD(&map->node); 631 map->fl = fl; 632 map->fd = fd; 633 map->buf = dma_buf_get(fd); 634 if (IS_ERR(map->buf)) { 635 err = PTR_ERR(map->buf); 636 goto get_err; 637 } 638 639 map->attach = dma_buf_attach(map->buf, sess->dev); 640 if (IS_ERR(map->attach)) { 641 dev_err(sess->dev, "Failed to attach dmabuf\n"); 642 err = PTR_ERR(map->attach); 643 goto attach_err; 644 } 645 646 map->table = dma_buf_map_attachment(map->attach, DMA_BIDIRECTIONAL); 647 if (IS_ERR(map->table)) { 648 err = PTR_ERR(map->table); 649 goto map_err; 650 } 651 652 map->phys = sg_dma_address(map->table->sgl); 653 map->phys += ((u64)fl->sctx->sid << 32); 654 map->size = len; 655 map->va = sg_virt(map->table->sgl); 656 map->len = len; 657 kref_init(&map->refcount); 658 659 spin_lock(&fl->lock); 660 list_add_tail(&map->node, &fl->maps); 661 spin_unlock(&fl->lock); 662 *ppmap = map; 663 664 return 0; 665 666 map_err: 667 dma_buf_detach(map->buf, map->attach); 668 attach_err: 669 dma_buf_put(map->buf); 670 get_err: 671 kfree(map); 672 673 return err; 674 } 675 676 /* 677 * Fastrpc payload buffer with metadata looks like: 678 * 679 * >>>>>> START of METADATA <<<<<<<<< 680 * +---------------------------------+ 681 * | Arguments | 682 * | type:(struct fastrpc_remote_arg)| 683 * | (0 - N) | 684 * +---------------------------------+ 685 * | Invoke Buffer list | 686 * | type:(struct fastrpc_invoke_buf)| 687 * | (0 - N) | 688 * +---------------------------------+ 689 * | Page info list | 690 * | type:(struct fastrpc_phy_page) | 691 * | (0 - N) | 692 * +---------------------------------+ 693 * | Optional info | 694 * |(can be specific to SoC/Firmware)| 695 * +---------------------------------+ 696 * >>>>>>>> END of METADATA <<<<<<<<< 697 * +---------------------------------+ 698 * | Inline ARGS | 699 * | (0-N) | 700 * +---------------------------------+ 701 */ 702 703 static int fastrpc_get_meta_size(struct fastrpc_invoke_ctx *ctx) 704 { 705 int size = 0; 706 707 size = (sizeof(struct fastrpc_remote_arg) + 708 sizeof(struct fastrpc_invoke_buf) + 709 sizeof(struct fastrpc_phy_page)) * ctx->nscalars + 710 sizeof(u64) * FASTRPC_MAX_FDLIST + 711 sizeof(u32) * FASTRPC_MAX_CRCLIST; 712 713 return size; 714 } 715 716 static u64 fastrpc_get_payload_size(struct fastrpc_invoke_ctx *ctx, int metalen) 717 { 718 u64 size = 0; 719 int i; 720 721 size = ALIGN(metalen, FASTRPC_ALIGN); 722 for (i = 0; i < ctx->nscalars; i++) { 723 if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1) { 724 725 if (ctx->olaps[i].offset == 0) 726 size = ALIGN(size, FASTRPC_ALIGN); 727 728 size += (ctx->olaps[i].mend - ctx->olaps[i].mstart); 729 } 730 } 731 732 return size; 733 } 734 735 static int fastrpc_create_maps(struct fastrpc_invoke_ctx *ctx) 736 { 737 struct device *dev = ctx->fl->sctx->dev; 738 int i, err; 739 740 for (i = 0; i < ctx->nscalars; ++i) { 741 /* Make sure reserved field is set to 0 */ 742 if (ctx->args[i].reserved) 743 return -EINVAL; 744 745 if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1 || 746 ctx->args[i].length == 0) 747 continue; 748 749 err = fastrpc_map_create(ctx->fl, ctx->args[i].fd, 750 ctx->args[i].length, &ctx->maps[i]); 751 if (err) { 752 dev_err(dev, "Error Creating map %d\n", err); 753 return -EINVAL; 754 } 755 756 } 757 return 0; 758 } 759 760 static int fastrpc_get_args(u32 kernel, struct fastrpc_invoke_ctx *ctx) 761 { 762 struct device *dev = ctx->fl->sctx->dev; 763 struct fastrpc_remote_arg *rpra; 764 struct fastrpc_invoke_buf *list; 765 struct fastrpc_phy_page *pages; 766 int inbufs, i, oix, err = 0; 767 u64 len, rlen, pkt_size; 768 u64 pg_start, pg_end; 769 uintptr_t args; 770 int metalen; 771 772 inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); 773 metalen = fastrpc_get_meta_size(ctx); 774 pkt_size = fastrpc_get_payload_size(ctx, metalen); 775 776 err = fastrpc_create_maps(ctx); 777 if (err) 778 return err; 779 780 ctx->msg_sz = pkt_size; 781 782 err = fastrpc_buf_alloc(ctx->fl, dev, pkt_size, &ctx->buf); 783 if (err) 784 return err; 785 786 rpra = ctx->buf->virt; 787 list = ctx->buf->virt + ctx->nscalars * sizeof(*rpra); 788 pages = ctx->buf->virt + ctx->nscalars * (sizeof(*list) + 789 sizeof(*rpra)); 790 args = (uintptr_t)ctx->buf->virt + metalen; 791 rlen = pkt_size - metalen; 792 ctx->rpra = rpra; 793 794 for (oix = 0; oix < ctx->nbufs; ++oix) { 795 int mlen; 796 797 i = ctx->olaps[oix].raix; 798 len = ctx->args[i].length; 799 800 rpra[i].pv = 0; 801 rpra[i].len = len; 802 list[i].num = len ? 1 : 0; 803 list[i].pgidx = i; 804 805 if (!len) 806 continue; 807 808 if (ctx->maps[i]) { 809 struct vm_area_struct *vma = NULL; 810 811 rpra[i].pv = (u64) ctx->args[i].ptr; 812 pages[i].addr = ctx->maps[i]->phys; 813 814 vma = find_vma(current->mm, ctx->args[i].ptr); 815 if (vma) 816 pages[i].addr += ctx->args[i].ptr - 817 vma->vm_start; 818 819 pg_start = (ctx->args[i].ptr & PAGE_MASK) >> PAGE_SHIFT; 820 pg_end = ((ctx->args[i].ptr + len - 1) & PAGE_MASK) >> 821 PAGE_SHIFT; 822 pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; 823 824 } else { 825 826 if (ctx->olaps[oix].offset == 0) { 827 rlen -= ALIGN(args, FASTRPC_ALIGN) - args; 828 args = ALIGN(args, FASTRPC_ALIGN); 829 } 830 831 mlen = ctx->olaps[oix].mend - ctx->olaps[oix].mstart; 832 833 if (rlen < mlen) 834 goto bail; 835 836 rpra[i].pv = args - ctx->olaps[oix].offset; 837 pages[i].addr = ctx->buf->phys - 838 ctx->olaps[oix].offset + 839 (pkt_size - rlen); 840 pages[i].addr = pages[i].addr & PAGE_MASK; 841 842 pg_start = (args & PAGE_MASK) >> PAGE_SHIFT; 843 pg_end = ((args + len - 1) & PAGE_MASK) >> PAGE_SHIFT; 844 pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; 845 args = args + mlen; 846 rlen -= mlen; 847 } 848 849 if (i < inbufs && !ctx->maps[i]) { 850 void *dst = (void *)(uintptr_t)rpra[i].pv; 851 void *src = (void *)(uintptr_t)ctx->args[i].ptr; 852 853 if (!kernel) { 854 if (copy_from_user(dst, (void __user *)src, 855 len)) { 856 err = -EFAULT; 857 goto bail; 858 } 859 } else { 860 memcpy(dst, src, len); 861 } 862 } 863 } 864 865 for (i = ctx->nbufs; i < ctx->nscalars; ++i) { 866 rpra[i].pv = (u64) ctx->args[i].ptr; 867 rpra[i].len = ctx->args[i].length; 868 list[i].num = ctx->args[i].length ? 1 : 0; 869 list[i].pgidx = i; 870 pages[i].addr = ctx->maps[i]->phys; 871 pages[i].size = ctx->maps[i]->size; 872 } 873 874 bail: 875 if (err) 876 dev_err(dev, "Error: get invoke args failed:%d\n", err); 877 878 return err; 879 } 880 881 static int fastrpc_put_args(struct fastrpc_invoke_ctx *ctx, 882 u32 kernel) 883 { 884 struct fastrpc_remote_arg *rpra = ctx->rpra; 885 int i, inbufs; 886 887 inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); 888 889 for (i = inbufs; i < ctx->nbufs; ++i) { 890 void *src = (void *)(uintptr_t)rpra[i].pv; 891 void *dst = (void *)(uintptr_t)ctx->args[i].ptr; 892 u64 len = rpra[i].len; 893 894 if (!kernel) { 895 if (copy_to_user((void __user *)dst, src, len)) 896 return -EFAULT; 897 } else { 898 memcpy(dst, src, len); 899 } 900 } 901 902 return 0; 903 } 904 905 static int fastrpc_invoke_send(struct fastrpc_session_ctx *sctx, 906 struct fastrpc_invoke_ctx *ctx, 907 u32 kernel, uint32_t handle) 908 { 909 struct fastrpc_channel_ctx *cctx; 910 struct fastrpc_user *fl = ctx->fl; 911 struct fastrpc_msg *msg = &ctx->msg; 912 int ret; 913 914 cctx = fl->cctx; 915 msg->pid = fl->tgid; 916 msg->tid = current->pid; 917 918 if (kernel) 919 msg->pid = 0; 920 921 msg->ctx = ctx->ctxid | fl->pd; 922 msg->handle = handle; 923 msg->sc = ctx->sc; 924 msg->addr = ctx->buf ? ctx->buf->phys : 0; 925 msg->size = roundup(ctx->msg_sz, PAGE_SIZE); 926 fastrpc_context_get(ctx); 927 928 ret = rpmsg_send(cctx->rpdev->ept, (void *)msg, sizeof(*msg)); 929 930 if (ret) 931 fastrpc_context_put(ctx); 932 933 return ret; 934 935 } 936 937 static int fastrpc_internal_invoke(struct fastrpc_user *fl, u32 kernel, 938 u32 handle, u32 sc, 939 struct fastrpc_invoke_args *args) 940 { 941 struct fastrpc_invoke_ctx *ctx = NULL; 942 int err = 0; 943 944 if (!fl->sctx) 945 return -EINVAL; 946 947 if (!fl->cctx->rpdev) 948 return -EPIPE; 949 950 ctx = fastrpc_context_alloc(fl, kernel, sc, args); 951 if (IS_ERR(ctx)) 952 return PTR_ERR(ctx); 953 954 if (ctx->nscalars) { 955 err = fastrpc_get_args(kernel, ctx); 956 if (err) 957 goto bail; 958 } 959 960 /* make sure that all CPU memory writes are seen by DSP */ 961 dma_wmb(); 962 /* Send invoke buffer to remote dsp */ 963 err = fastrpc_invoke_send(fl->sctx, ctx, kernel, handle); 964 if (err) 965 goto bail; 966 967 if (kernel) { 968 if (!wait_for_completion_timeout(&ctx->work, 10 * HZ)) 969 err = -ETIMEDOUT; 970 } else { 971 err = wait_for_completion_interruptible(&ctx->work); 972 } 973 974 if (err) 975 goto bail; 976 977 /* Check the response from remote dsp */ 978 err = ctx->retval; 979 if (err) 980 goto bail; 981 982 if (ctx->nscalars) { 983 /* make sure that all memory writes by DSP are seen by CPU */ 984 dma_rmb(); 985 /* populate all the output buffers with results */ 986 err = fastrpc_put_args(ctx, kernel); 987 if (err) 988 goto bail; 989 } 990 991 bail: 992 if (err != -ERESTARTSYS && err != -ETIMEDOUT) { 993 /* We are done with this compute context */ 994 spin_lock(&fl->lock); 995 list_del(&ctx->node); 996 spin_unlock(&fl->lock); 997 fastrpc_context_put(ctx); 998 } 999 if (err) 1000 dev_dbg(fl->sctx->dev, "Error: Invoke Failed %d\n", err); 1001 1002 return err; 1003 } 1004 1005 static int fastrpc_init_create_process(struct fastrpc_user *fl, 1006 char __user *argp) 1007 { 1008 struct fastrpc_init_create init; 1009 struct fastrpc_invoke_args *args; 1010 struct fastrpc_phy_page pages[1]; 1011 struct fastrpc_map *map = NULL; 1012 struct fastrpc_buf *imem = NULL; 1013 int memlen; 1014 int err; 1015 struct { 1016 int pgid; 1017 u32 namelen; 1018 u32 filelen; 1019 u32 pageslen; 1020 u32 attrs; 1021 u32 siglen; 1022 } inbuf; 1023 u32 sc; 1024 1025 args = kcalloc(FASTRPC_CREATE_PROCESS_NARGS, sizeof(*args), GFP_KERNEL); 1026 if (!args) 1027 return -ENOMEM; 1028 1029 if (copy_from_user(&init, argp, sizeof(init))) { 1030 err = -EFAULT; 1031 goto err; 1032 } 1033 1034 if (init.filelen > INIT_FILELEN_MAX) { 1035 err = -EINVAL; 1036 goto err; 1037 } 1038 1039 inbuf.pgid = fl->tgid; 1040 inbuf.namelen = strlen(current->comm) + 1; 1041 inbuf.filelen = init.filelen; 1042 inbuf.pageslen = 1; 1043 inbuf.attrs = init.attrs; 1044 inbuf.siglen = init.siglen; 1045 fl->pd = USER_PD; 1046 1047 if (init.filelen && init.filefd) { 1048 err = fastrpc_map_create(fl, init.filefd, init.filelen, &map); 1049 if (err) 1050 goto err; 1051 } 1052 1053 memlen = ALIGN(max(INIT_FILELEN_MAX, (int)init.filelen * 4), 1054 1024 * 1024); 1055 err = fastrpc_buf_alloc(fl, fl->sctx->dev, memlen, 1056 &imem); 1057 if (err) 1058 goto err_alloc; 1059 1060 fl->init_mem = imem; 1061 args[0].ptr = (u64)(uintptr_t)&inbuf; 1062 args[0].length = sizeof(inbuf); 1063 args[0].fd = -1; 1064 1065 args[1].ptr = (u64)(uintptr_t)current->comm; 1066 args[1].length = inbuf.namelen; 1067 args[1].fd = -1; 1068 1069 args[2].ptr = (u64) init.file; 1070 args[2].length = inbuf.filelen; 1071 args[2].fd = init.filefd; 1072 1073 pages[0].addr = imem->phys; 1074 pages[0].size = imem->size; 1075 1076 args[3].ptr = (u64)(uintptr_t) pages; 1077 args[3].length = 1 * sizeof(*pages); 1078 args[3].fd = -1; 1079 1080 args[4].ptr = (u64)(uintptr_t)&inbuf.attrs; 1081 args[4].length = sizeof(inbuf.attrs); 1082 args[4].fd = -1; 1083 1084 args[5].ptr = (u64)(uintptr_t) &inbuf.siglen; 1085 args[5].length = sizeof(inbuf.siglen); 1086 args[5].fd = -1; 1087 1088 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE, 4, 0); 1089 if (init.attrs) 1090 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE_ATTR, 6, 0); 1091 1092 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1093 sc, args); 1094 if (err) 1095 goto err_invoke; 1096 1097 kfree(args); 1098 1099 return 0; 1100 1101 err_invoke: 1102 fl->init_mem = NULL; 1103 fastrpc_buf_free(imem); 1104 err_alloc: 1105 if (map) { 1106 spin_lock(&fl->lock); 1107 list_del(&map->node); 1108 spin_unlock(&fl->lock); 1109 fastrpc_map_put(map); 1110 } 1111 err: 1112 kfree(args); 1113 1114 return err; 1115 } 1116 1117 static struct fastrpc_session_ctx *fastrpc_session_alloc( 1118 struct fastrpc_channel_ctx *cctx) 1119 { 1120 struct fastrpc_session_ctx *session = NULL; 1121 unsigned long flags; 1122 int i; 1123 1124 spin_lock_irqsave(&cctx->lock, flags); 1125 for (i = 0; i < cctx->sesscount; i++) { 1126 if (!cctx->session[i].used && cctx->session[i].valid) { 1127 cctx->session[i].used = true; 1128 session = &cctx->session[i]; 1129 break; 1130 } 1131 } 1132 spin_unlock_irqrestore(&cctx->lock, flags); 1133 1134 return session; 1135 } 1136 1137 static void fastrpc_session_free(struct fastrpc_channel_ctx *cctx, 1138 struct fastrpc_session_ctx *session) 1139 { 1140 unsigned long flags; 1141 1142 spin_lock_irqsave(&cctx->lock, flags); 1143 session->used = false; 1144 spin_unlock_irqrestore(&cctx->lock, flags); 1145 } 1146 1147 static int fastrpc_release_current_dsp_process(struct fastrpc_user *fl) 1148 { 1149 struct fastrpc_invoke_args args[1]; 1150 int tgid = 0; 1151 u32 sc; 1152 1153 tgid = fl->tgid; 1154 args[0].ptr = (u64)(uintptr_t) &tgid; 1155 args[0].length = sizeof(tgid); 1156 args[0].fd = -1; 1157 args[0].reserved = 0; 1158 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_RELEASE, 1, 0); 1159 1160 return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1161 sc, &args[0]); 1162 } 1163 1164 static int fastrpc_device_release(struct inode *inode, struct file *file) 1165 { 1166 struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; 1167 struct fastrpc_channel_ctx *cctx = fl->cctx; 1168 struct fastrpc_invoke_ctx *ctx, *n; 1169 struct fastrpc_map *map, *m; 1170 struct fastrpc_buf *buf, *b; 1171 unsigned long flags; 1172 1173 fastrpc_release_current_dsp_process(fl); 1174 1175 spin_lock_irqsave(&cctx->lock, flags); 1176 list_del(&fl->user); 1177 spin_unlock_irqrestore(&cctx->lock, flags); 1178 1179 if (fl->init_mem) 1180 fastrpc_buf_free(fl->init_mem); 1181 1182 list_for_each_entry_safe(ctx, n, &fl->pending, node) { 1183 list_del(&ctx->node); 1184 fastrpc_context_put(ctx); 1185 } 1186 1187 list_for_each_entry_safe(map, m, &fl->maps, node) { 1188 list_del(&map->node); 1189 fastrpc_map_put(map); 1190 } 1191 1192 list_for_each_entry_safe(buf, b, &fl->mmaps, node) { 1193 list_del(&buf->node); 1194 fastrpc_buf_free(buf); 1195 } 1196 1197 fastrpc_session_free(cctx, fl->sctx); 1198 fastrpc_channel_ctx_put(cctx); 1199 1200 mutex_destroy(&fl->mutex); 1201 kfree(fl); 1202 file->private_data = NULL; 1203 1204 return 0; 1205 } 1206 1207 static int fastrpc_device_open(struct inode *inode, struct file *filp) 1208 { 1209 struct fastrpc_channel_ctx *cctx = miscdev_to_cctx(filp->private_data); 1210 struct fastrpc_user *fl = NULL; 1211 unsigned long flags; 1212 1213 fl = kzalloc(sizeof(*fl), GFP_KERNEL); 1214 if (!fl) 1215 return -ENOMEM; 1216 1217 /* Released in fastrpc_device_release() */ 1218 fastrpc_channel_ctx_get(cctx); 1219 1220 filp->private_data = fl; 1221 spin_lock_init(&fl->lock); 1222 mutex_init(&fl->mutex); 1223 INIT_LIST_HEAD(&fl->pending); 1224 INIT_LIST_HEAD(&fl->maps); 1225 INIT_LIST_HEAD(&fl->mmaps); 1226 INIT_LIST_HEAD(&fl->user); 1227 fl->tgid = current->tgid; 1228 fl->cctx = cctx; 1229 1230 fl->sctx = fastrpc_session_alloc(cctx); 1231 if (!fl->sctx) { 1232 dev_err(&cctx->rpdev->dev, "No session available\n"); 1233 mutex_destroy(&fl->mutex); 1234 kfree(fl); 1235 1236 return -EBUSY; 1237 } 1238 1239 spin_lock_irqsave(&cctx->lock, flags); 1240 list_add_tail(&fl->user, &cctx->users); 1241 spin_unlock_irqrestore(&cctx->lock, flags); 1242 1243 return 0; 1244 } 1245 1246 static int fastrpc_dmabuf_alloc(struct fastrpc_user *fl, char __user *argp) 1247 { 1248 struct fastrpc_alloc_dma_buf bp; 1249 DEFINE_DMA_BUF_EXPORT_INFO(exp_info); 1250 struct fastrpc_buf *buf = NULL; 1251 int err; 1252 1253 if (copy_from_user(&bp, argp, sizeof(bp))) 1254 return -EFAULT; 1255 1256 err = fastrpc_buf_alloc(fl, fl->sctx->dev, bp.size, &buf); 1257 if (err) 1258 return err; 1259 exp_info.ops = &fastrpc_dma_buf_ops; 1260 exp_info.size = bp.size; 1261 exp_info.flags = O_RDWR; 1262 exp_info.priv = buf; 1263 buf->dmabuf = dma_buf_export(&exp_info); 1264 if (IS_ERR(buf->dmabuf)) { 1265 err = PTR_ERR(buf->dmabuf); 1266 fastrpc_buf_free(buf); 1267 return err; 1268 } 1269 1270 bp.fd = dma_buf_fd(buf->dmabuf, O_ACCMODE); 1271 if (bp.fd < 0) { 1272 dma_buf_put(buf->dmabuf); 1273 return -EINVAL; 1274 } 1275 1276 if (copy_to_user(argp, &bp, sizeof(bp))) { 1277 dma_buf_put(buf->dmabuf); 1278 return -EFAULT; 1279 } 1280 1281 return 0; 1282 } 1283 1284 static int fastrpc_init_attach(struct fastrpc_user *fl, int pd) 1285 { 1286 struct fastrpc_invoke_args args[1]; 1287 int tgid = fl->tgid; 1288 u32 sc; 1289 1290 args[0].ptr = (u64)(uintptr_t) &tgid; 1291 args[0].length = sizeof(tgid); 1292 args[0].fd = -1; 1293 args[0].reserved = 0; 1294 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_ATTACH, 1, 0); 1295 fl->pd = pd; 1296 1297 return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1298 sc, &args[0]); 1299 } 1300 1301 static int fastrpc_invoke(struct fastrpc_user *fl, char __user *argp) 1302 { 1303 struct fastrpc_invoke_args *args = NULL; 1304 struct fastrpc_invoke inv; 1305 u32 nscalars; 1306 int err; 1307 1308 if (copy_from_user(&inv, argp, sizeof(inv))) 1309 return -EFAULT; 1310 1311 /* nscalars is truncated here to max supported value */ 1312 nscalars = REMOTE_SCALARS_LENGTH(inv.sc); 1313 if (nscalars) { 1314 args = kcalloc(nscalars, sizeof(*args), GFP_KERNEL); 1315 if (!args) 1316 return -ENOMEM; 1317 1318 if (copy_from_user(args, (void __user *)(uintptr_t)inv.args, 1319 nscalars * sizeof(*args))) { 1320 kfree(args); 1321 return -EFAULT; 1322 } 1323 } 1324 1325 err = fastrpc_internal_invoke(fl, false, inv.handle, inv.sc, args); 1326 kfree(args); 1327 1328 return err; 1329 } 1330 1331 static int fastrpc_req_munmap_impl(struct fastrpc_user *fl, 1332 struct fastrpc_req_munmap *req) 1333 { 1334 struct fastrpc_invoke_args args[1] = { [0] = { 0 } }; 1335 struct fastrpc_buf *buf, *b; 1336 struct fastrpc_munmap_req_msg req_msg; 1337 struct device *dev = fl->sctx->dev; 1338 int err; 1339 u32 sc; 1340 1341 spin_lock(&fl->lock); 1342 list_for_each_entry_safe(buf, b, &fl->mmaps, node) { 1343 if ((buf->raddr == req->vaddrout) && (buf->size == req->size)) 1344 break; 1345 buf = NULL; 1346 } 1347 spin_unlock(&fl->lock); 1348 1349 if (!buf) { 1350 dev_err(dev, "mmap not in list\n"); 1351 return -EINVAL; 1352 } 1353 1354 req_msg.pgid = fl->tgid; 1355 req_msg.size = buf->size; 1356 req_msg.vaddr = buf->raddr; 1357 1358 args[0].ptr = (u64) (uintptr_t) &req_msg; 1359 args[0].length = sizeof(req_msg); 1360 1361 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MUNMAP, 1, 0); 1362 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, 1363 &args[0]); 1364 if (!err) { 1365 dev_dbg(dev, "unmmap\tpt 0x%09lx OK\n", buf->raddr); 1366 spin_lock(&fl->lock); 1367 list_del(&buf->node); 1368 spin_unlock(&fl->lock); 1369 fastrpc_buf_free(buf); 1370 } else { 1371 dev_err(dev, "unmmap\tpt 0x%09lx ERROR\n", buf->raddr); 1372 } 1373 1374 return err; 1375 } 1376 1377 static int fastrpc_req_munmap(struct fastrpc_user *fl, char __user *argp) 1378 { 1379 struct fastrpc_req_munmap req; 1380 1381 if (copy_from_user(&req, argp, sizeof(req))) 1382 return -EFAULT; 1383 1384 return fastrpc_req_munmap_impl(fl, &req); 1385 } 1386 1387 static int fastrpc_req_mmap(struct fastrpc_user *fl, char __user *argp) 1388 { 1389 struct fastrpc_invoke_args args[3] = { [0 ... 2] = { 0 } }; 1390 struct fastrpc_buf *buf = NULL; 1391 struct fastrpc_mmap_req_msg req_msg; 1392 struct fastrpc_mmap_rsp_msg rsp_msg; 1393 struct fastrpc_req_munmap req_unmap; 1394 struct fastrpc_phy_page pages; 1395 struct fastrpc_req_mmap req; 1396 struct device *dev = fl->sctx->dev; 1397 int err; 1398 u32 sc; 1399 1400 if (copy_from_user(&req, argp, sizeof(req))) 1401 return -EFAULT; 1402 1403 if (req.flags != ADSP_MMAP_ADD_PAGES) { 1404 dev_err(dev, "flag not supported 0x%x\n", req.flags); 1405 return -EINVAL; 1406 } 1407 1408 if (req.vaddrin) { 1409 dev_err(dev, "adding user allocated pages is not supported\n"); 1410 return -EINVAL; 1411 } 1412 1413 err = fastrpc_buf_alloc(fl, fl->sctx->dev, req.size, &buf); 1414 if (err) { 1415 dev_err(dev, "failed to allocate buffer\n"); 1416 return err; 1417 } 1418 1419 req_msg.pgid = fl->tgid; 1420 req_msg.flags = req.flags; 1421 req_msg.vaddr = req.vaddrin; 1422 req_msg.num = sizeof(pages); 1423 1424 args[0].ptr = (u64) (uintptr_t) &req_msg; 1425 args[0].length = sizeof(req_msg); 1426 1427 pages.addr = buf->phys; 1428 pages.size = buf->size; 1429 1430 args[1].ptr = (u64) (uintptr_t) &pages; 1431 args[1].length = sizeof(pages); 1432 1433 args[2].ptr = (u64) (uintptr_t) &rsp_msg; 1434 args[2].length = sizeof(rsp_msg); 1435 1436 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MMAP, 2, 1); 1437 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, 1438 &args[0]); 1439 if (err) { 1440 dev_err(dev, "mmap error (len 0x%08llx)\n", buf->size); 1441 goto err_invoke; 1442 } 1443 1444 /* update the buffer to be able to deallocate the memory on the DSP */ 1445 buf->raddr = (uintptr_t) rsp_msg.vaddr; 1446 1447 /* let the client know the address to use */ 1448 req.vaddrout = rsp_msg.vaddr; 1449 1450 spin_lock(&fl->lock); 1451 list_add_tail(&buf->node, &fl->mmaps); 1452 spin_unlock(&fl->lock); 1453 1454 if (copy_to_user((void __user *)argp, &req, sizeof(req))) { 1455 /* unmap the memory and release the buffer */ 1456 req_unmap.vaddrout = buf->raddr; 1457 req_unmap.size = buf->size; 1458 fastrpc_req_munmap_impl(fl, &req_unmap); 1459 return -EFAULT; 1460 } 1461 1462 dev_dbg(dev, "mmap\t\tpt 0x%09lx OK [len 0x%08llx]\n", 1463 buf->raddr, buf->size); 1464 1465 return 0; 1466 1467 err_invoke: 1468 fastrpc_buf_free(buf); 1469 1470 return err; 1471 } 1472 1473 static long fastrpc_device_ioctl(struct file *file, unsigned int cmd, 1474 unsigned long arg) 1475 { 1476 struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; 1477 char __user *argp = (char __user *)arg; 1478 int err; 1479 1480 switch (cmd) { 1481 case FASTRPC_IOCTL_INVOKE: 1482 err = fastrpc_invoke(fl, argp); 1483 break; 1484 case FASTRPC_IOCTL_INIT_ATTACH: 1485 err = fastrpc_init_attach(fl, AUDIO_PD); 1486 break; 1487 case FASTRPC_IOCTL_INIT_ATTACH_SNS: 1488 err = fastrpc_init_attach(fl, SENSORS_PD); 1489 break; 1490 case FASTRPC_IOCTL_INIT_CREATE: 1491 err = fastrpc_init_create_process(fl, argp); 1492 break; 1493 case FASTRPC_IOCTL_ALLOC_DMA_BUFF: 1494 err = fastrpc_dmabuf_alloc(fl, argp); 1495 break; 1496 case FASTRPC_IOCTL_MMAP: 1497 err = fastrpc_req_mmap(fl, argp); 1498 break; 1499 case FASTRPC_IOCTL_MUNMAP: 1500 err = fastrpc_req_munmap(fl, argp); 1501 break; 1502 default: 1503 err = -ENOTTY; 1504 break; 1505 } 1506 1507 return err; 1508 } 1509 1510 static const struct file_operations fastrpc_fops = { 1511 .open = fastrpc_device_open, 1512 .release = fastrpc_device_release, 1513 .unlocked_ioctl = fastrpc_device_ioctl, 1514 .compat_ioctl = fastrpc_device_ioctl, 1515 }; 1516 1517 static int fastrpc_cb_probe(struct platform_device *pdev) 1518 { 1519 struct fastrpc_channel_ctx *cctx; 1520 struct fastrpc_session_ctx *sess; 1521 struct device *dev = &pdev->dev; 1522 int i, sessions = 0; 1523 unsigned long flags; 1524 int rc; 1525 1526 cctx = dev_get_drvdata(dev->parent); 1527 if (!cctx) 1528 return -EINVAL; 1529 1530 of_property_read_u32(dev->of_node, "qcom,nsessions", &sessions); 1531 1532 spin_lock_irqsave(&cctx->lock, flags); 1533 sess = &cctx->session[cctx->sesscount]; 1534 sess->used = false; 1535 sess->valid = true; 1536 sess->dev = dev; 1537 dev_set_drvdata(dev, sess); 1538 1539 if (of_property_read_u32(dev->of_node, "reg", &sess->sid)) 1540 dev_info(dev, "FastRPC Session ID not specified in DT\n"); 1541 1542 if (sessions > 0) { 1543 struct fastrpc_session_ctx *dup_sess; 1544 1545 for (i = 1; i < sessions; i++) { 1546 if (cctx->sesscount++ >= FASTRPC_MAX_SESSIONS) 1547 break; 1548 dup_sess = &cctx->session[cctx->sesscount]; 1549 memcpy(dup_sess, sess, sizeof(*dup_sess)); 1550 } 1551 } 1552 cctx->sesscount++; 1553 spin_unlock_irqrestore(&cctx->lock, flags); 1554 rc = dma_set_mask(dev, DMA_BIT_MASK(32)); 1555 if (rc) { 1556 dev_err(dev, "32-bit DMA enable failed\n"); 1557 return rc; 1558 } 1559 1560 return 0; 1561 } 1562 1563 static int fastrpc_cb_remove(struct platform_device *pdev) 1564 { 1565 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(pdev->dev.parent); 1566 struct fastrpc_session_ctx *sess = dev_get_drvdata(&pdev->dev); 1567 unsigned long flags; 1568 int i; 1569 1570 spin_lock_irqsave(&cctx->lock, flags); 1571 for (i = 1; i < FASTRPC_MAX_SESSIONS; i++) { 1572 if (cctx->session[i].sid == sess->sid) { 1573 cctx->session[i].valid = false; 1574 cctx->sesscount--; 1575 } 1576 } 1577 spin_unlock_irqrestore(&cctx->lock, flags); 1578 1579 return 0; 1580 } 1581 1582 static const struct of_device_id fastrpc_match_table[] = { 1583 { .compatible = "qcom,fastrpc-compute-cb", }, 1584 {} 1585 }; 1586 1587 static struct platform_driver fastrpc_cb_driver = { 1588 .probe = fastrpc_cb_probe, 1589 .remove = fastrpc_cb_remove, 1590 .driver = { 1591 .name = "qcom,fastrpc-cb", 1592 .of_match_table = fastrpc_match_table, 1593 .suppress_bind_attrs = true, 1594 }, 1595 }; 1596 1597 static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev) 1598 { 1599 struct device *rdev = &rpdev->dev; 1600 struct fastrpc_channel_ctx *data; 1601 int i, err, domain_id = -1; 1602 const char *domain; 1603 1604 err = of_property_read_string(rdev->of_node, "label", &domain); 1605 if (err) { 1606 dev_info(rdev, "FastRPC Domain not specified in DT\n"); 1607 return err; 1608 } 1609 1610 for (i = 0; i <= CDSP_DOMAIN_ID; i++) { 1611 if (!strcmp(domains[i], domain)) { 1612 domain_id = i; 1613 break; 1614 } 1615 } 1616 1617 if (domain_id < 0) { 1618 dev_info(rdev, "FastRPC Invalid Domain ID %d\n", domain_id); 1619 return -EINVAL; 1620 } 1621 1622 data = kzalloc(sizeof(*data), GFP_KERNEL); 1623 if (!data) 1624 return -ENOMEM; 1625 1626 data->miscdev.minor = MISC_DYNAMIC_MINOR; 1627 data->miscdev.name = devm_kasprintf(rdev, GFP_KERNEL, "fastrpc-%s", 1628 domains[domain_id]); 1629 data->miscdev.fops = &fastrpc_fops; 1630 err = misc_register(&data->miscdev); 1631 if (err) { 1632 kfree(data); 1633 return err; 1634 } 1635 1636 kref_init(&data->refcount); 1637 1638 dev_set_drvdata(&rpdev->dev, data); 1639 dma_set_mask_and_coherent(rdev, DMA_BIT_MASK(32)); 1640 INIT_LIST_HEAD(&data->users); 1641 spin_lock_init(&data->lock); 1642 idr_init(&data->ctx_idr); 1643 data->domain_id = domain_id; 1644 data->rpdev = rpdev; 1645 1646 return of_platform_populate(rdev->of_node, NULL, NULL, rdev); 1647 } 1648 1649 static void fastrpc_notify_users(struct fastrpc_user *user) 1650 { 1651 struct fastrpc_invoke_ctx *ctx; 1652 1653 spin_lock(&user->lock); 1654 list_for_each_entry(ctx, &user->pending, node) 1655 complete(&ctx->work); 1656 spin_unlock(&user->lock); 1657 } 1658 1659 static void fastrpc_rpmsg_remove(struct rpmsg_device *rpdev) 1660 { 1661 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); 1662 struct fastrpc_user *user; 1663 unsigned long flags; 1664 1665 spin_lock_irqsave(&cctx->lock, flags); 1666 list_for_each_entry(user, &cctx->users, user) 1667 fastrpc_notify_users(user); 1668 spin_unlock_irqrestore(&cctx->lock, flags); 1669 1670 misc_deregister(&cctx->miscdev); 1671 of_platform_depopulate(&rpdev->dev); 1672 1673 cctx->rpdev = NULL; 1674 fastrpc_channel_ctx_put(cctx); 1675 } 1676 1677 static int fastrpc_rpmsg_callback(struct rpmsg_device *rpdev, void *data, 1678 int len, void *priv, u32 addr) 1679 { 1680 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); 1681 struct fastrpc_invoke_rsp *rsp = data; 1682 struct fastrpc_invoke_ctx *ctx; 1683 unsigned long flags; 1684 unsigned long ctxid; 1685 1686 if (len < sizeof(*rsp)) 1687 return -EINVAL; 1688 1689 ctxid = ((rsp->ctx & FASTRPC_CTXID_MASK) >> 4); 1690 1691 spin_lock_irqsave(&cctx->lock, flags); 1692 ctx = idr_find(&cctx->ctx_idr, ctxid); 1693 spin_unlock_irqrestore(&cctx->lock, flags); 1694 1695 if (!ctx) { 1696 dev_err(&rpdev->dev, "No context ID matches response\n"); 1697 return -ENOENT; 1698 } 1699 1700 ctx->retval = rsp->retval; 1701 complete(&ctx->work); 1702 1703 /* 1704 * The DMA buffer associated with the context cannot be freed in 1705 * interrupt context so schedule it through a worker thread to 1706 * avoid a kernel BUG. 1707 */ 1708 schedule_work(&ctx->put_work); 1709 1710 return 0; 1711 } 1712 1713 static const struct of_device_id fastrpc_rpmsg_of_match[] = { 1714 { .compatible = "qcom,fastrpc" }, 1715 { }, 1716 }; 1717 MODULE_DEVICE_TABLE(of, fastrpc_rpmsg_of_match); 1718 1719 static struct rpmsg_driver fastrpc_driver = { 1720 .probe = fastrpc_rpmsg_probe, 1721 .remove = fastrpc_rpmsg_remove, 1722 .callback = fastrpc_rpmsg_callback, 1723 .drv = { 1724 .name = "qcom,fastrpc", 1725 .of_match_table = fastrpc_rpmsg_of_match, 1726 }, 1727 }; 1728 1729 static int fastrpc_init(void) 1730 { 1731 int ret; 1732 1733 ret = platform_driver_register(&fastrpc_cb_driver); 1734 if (ret < 0) { 1735 pr_err("fastrpc: failed to register cb driver\n"); 1736 return ret; 1737 } 1738 1739 ret = register_rpmsg_driver(&fastrpc_driver); 1740 if (ret < 0) { 1741 pr_err("fastrpc: failed to register rpmsg driver\n"); 1742 platform_driver_unregister(&fastrpc_cb_driver); 1743 return ret; 1744 } 1745 1746 return 0; 1747 } 1748 module_init(fastrpc_init); 1749 1750 static void fastrpc_exit(void) 1751 { 1752 platform_driver_unregister(&fastrpc_cb_driver); 1753 unregister_rpmsg_driver(&fastrpc_driver); 1754 } 1755 module_exit(fastrpc_exit); 1756 1757 MODULE_LICENSE("GPL v2"); 1758