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