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 int ret; 908 909 cctx = fl->cctx; 910 msg->pid = fl->tgid; 911 msg->tid = current->pid; 912 913 if (kernel) 914 msg->pid = 0; 915 916 msg->ctx = ctx->ctxid | fl->pd; 917 msg->handle = handle; 918 msg->sc = ctx->sc; 919 msg->addr = ctx->buf ? ctx->buf->phys : 0; 920 msg->size = roundup(ctx->msg_sz, PAGE_SIZE); 921 fastrpc_context_get(ctx); 922 923 ret = rpmsg_send(cctx->rpdev->ept, (void *)msg, sizeof(*msg)); 924 925 if (ret) 926 fastrpc_context_put(ctx); 927 928 return ret; 929 930 } 931 932 static int fastrpc_internal_invoke(struct fastrpc_user *fl, u32 kernel, 933 u32 handle, u32 sc, 934 struct fastrpc_invoke_args *args) 935 { 936 struct fastrpc_invoke_ctx *ctx = NULL; 937 int err = 0; 938 939 if (!fl->sctx) 940 return -EINVAL; 941 942 if (!fl->cctx->rpdev) 943 return -EPIPE; 944 945 ctx = fastrpc_context_alloc(fl, kernel, sc, args); 946 if (IS_ERR(ctx)) 947 return PTR_ERR(ctx); 948 949 if (ctx->nscalars) { 950 err = fastrpc_get_args(kernel, ctx); 951 if (err) 952 goto bail; 953 } 954 955 /* make sure that all CPU memory writes are seen by DSP */ 956 dma_wmb(); 957 /* Send invoke buffer to remote dsp */ 958 err = fastrpc_invoke_send(fl->sctx, ctx, kernel, handle); 959 if (err) 960 goto bail; 961 962 if (kernel) { 963 if (!wait_for_completion_timeout(&ctx->work, 10 * HZ)) 964 err = -ETIMEDOUT; 965 } else { 966 err = wait_for_completion_interruptible(&ctx->work); 967 } 968 969 if (err) 970 goto bail; 971 972 /* Check the response from remote dsp */ 973 err = ctx->retval; 974 if (err) 975 goto bail; 976 977 if (ctx->nscalars) { 978 /* make sure that all memory writes by DSP are seen by CPU */ 979 dma_rmb(); 980 /* populate all the output buffers with results */ 981 err = fastrpc_put_args(ctx, kernel); 982 if (err) 983 goto bail; 984 } 985 986 bail: 987 if (err != -ERESTARTSYS && err != -ETIMEDOUT) { 988 /* We are done with this compute context */ 989 spin_lock(&fl->lock); 990 list_del(&ctx->node); 991 spin_unlock(&fl->lock); 992 fastrpc_context_put(ctx); 993 } 994 if (err) 995 dev_dbg(fl->sctx->dev, "Error: Invoke Failed %d\n", err); 996 997 return err; 998 } 999 1000 static int fastrpc_init_create_process(struct fastrpc_user *fl, 1001 char __user *argp) 1002 { 1003 struct fastrpc_init_create init; 1004 struct fastrpc_invoke_args *args; 1005 struct fastrpc_phy_page pages[1]; 1006 struct fastrpc_map *map = NULL; 1007 struct fastrpc_buf *imem = NULL; 1008 int memlen; 1009 int err; 1010 struct { 1011 int pgid; 1012 u32 namelen; 1013 u32 filelen; 1014 u32 pageslen; 1015 u32 attrs; 1016 u32 siglen; 1017 } inbuf; 1018 u32 sc; 1019 1020 args = kcalloc(FASTRPC_CREATE_PROCESS_NARGS, sizeof(*args), GFP_KERNEL); 1021 if (!args) 1022 return -ENOMEM; 1023 1024 if (copy_from_user(&init, argp, sizeof(init))) { 1025 err = -EFAULT; 1026 goto err; 1027 } 1028 1029 if (init.filelen > INIT_FILELEN_MAX) { 1030 err = -EINVAL; 1031 goto err; 1032 } 1033 1034 inbuf.pgid = fl->tgid; 1035 inbuf.namelen = strlen(current->comm) + 1; 1036 inbuf.filelen = init.filelen; 1037 inbuf.pageslen = 1; 1038 inbuf.attrs = init.attrs; 1039 inbuf.siglen = init.siglen; 1040 fl->pd = 1; 1041 1042 if (init.filelen && init.filefd) { 1043 err = fastrpc_map_create(fl, init.filefd, init.filelen, &map); 1044 if (err) 1045 goto err; 1046 } 1047 1048 memlen = ALIGN(max(INIT_FILELEN_MAX, (int)init.filelen * 4), 1049 1024 * 1024); 1050 err = fastrpc_buf_alloc(fl, fl->sctx->dev, memlen, 1051 &imem); 1052 if (err) 1053 goto err_alloc; 1054 1055 fl->init_mem = imem; 1056 args[0].ptr = (u64)(uintptr_t)&inbuf; 1057 args[0].length = sizeof(inbuf); 1058 args[0].fd = -1; 1059 1060 args[1].ptr = (u64)(uintptr_t)current->comm; 1061 args[1].length = inbuf.namelen; 1062 args[1].fd = -1; 1063 1064 args[2].ptr = (u64) init.file; 1065 args[2].length = inbuf.filelen; 1066 args[2].fd = init.filefd; 1067 1068 pages[0].addr = imem->phys; 1069 pages[0].size = imem->size; 1070 1071 args[3].ptr = (u64)(uintptr_t) pages; 1072 args[3].length = 1 * sizeof(*pages); 1073 args[3].fd = -1; 1074 1075 args[4].ptr = (u64)(uintptr_t)&inbuf.attrs; 1076 args[4].length = sizeof(inbuf.attrs); 1077 args[4].fd = -1; 1078 1079 args[5].ptr = (u64)(uintptr_t) &inbuf.siglen; 1080 args[5].length = sizeof(inbuf.siglen); 1081 args[5].fd = -1; 1082 1083 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE, 4, 0); 1084 if (init.attrs) 1085 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE_ATTR, 6, 0); 1086 1087 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1088 sc, args); 1089 if (err) 1090 goto err_invoke; 1091 1092 kfree(args); 1093 1094 return 0; 1095 1096 err_invoke: 1097 fl->init_mem = NULL; 1098 fastrpc_buf_free(imem); 1099 err_alloc: 1100 if (map) { 1101 spin_lock(&fl->lock); 1102 list_del(&map->node); 1103 spin_unlock(&fl->lock); 1104 fastrpc_map_put(map); 1105 } 1106 err: 1107 kfree(args); 1108 1109 return err; 1110 } 1111 1112 static struct fastrpc_session_ctx *fastrpc_session_alloc( 1113 struct fastrpc_channel_ctx *cctx) 1114 { 1115 struct fastrpc_session_ctx *session = NULL; 1116 unsigned long flags; 1117 int i; 1118 1119 spin_lock_irqsave(&cctx->lock, flags); 1120 for (i = 0; i < cctx->sesscount; i++) { 1121 if (!cctx->session[i].used && cctx->session[i].valid) { 1122 cctx->session[i].used = true; 1123 session = &cctx->session[i]; 1124 break; 1125 } 1126 } 1127 spin_unlock_irqrestore(&cctx->lock, flags); 1128 1129 return session; 1130 } 1131 1132 static void fastrpc_session_free(struct fastrpc_channel_ctx *cctx, 1133 struct fastrpc_session_ctx *session) 1134 { 1135 unsigned long flags; 1136 1137 spin_lock_irqsave(&cctx->lock, flags); 1138 session->used = false; 1139 spin_unlock_irqrestore(&cctx->lock, flags); 1140 } 1141 1142 static int fastrpc_release_current_dsp_process(struct fastrpc_user *fl) 1143 { 1144 struct fastrpc_invoke_args args[1]; 1145 int tgid = 0; 1146 u32 sc; 1147 1148 tgid = fl->tgid; 1149 args[0].ptr = (u64)(uintptr_t) &tgid; 1150 args[0].length = sizeof(tgid); 1151 args[0].fd = -1; 1152 args[0].reserved = 0; 1153 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_RELEASE, 1, 0); 1154 1155 return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1156 sc, &args[0]); 1157 } 1158 1159 static int fastrpc_device_release(struct inode *inode, struct file *file) 1160 { 1161 struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; 1162 struct fastrpc_channel_ctx *cctx = fl->cctx; 1163 struct fastrpc_invoke_ctx *ctx, *n; 1164 struct fastrpc_map *map, *m; 1165 struct fastrpc_buf *buf, *b; 1166 unsigned long flags; 1167 1168 fastrpc_release_current_dsp_process(fl); 1169 1170 spin_lock_irqsave(&cctx->lock, flags); 1171 list_del(&fl->user); 1172 spin_unlock_irqrestore(&cctx->lock, flags); 1173 1174 if (fl->init_mem) 1175 fastrpc_buf_free(fl->init_mem); 1176 1177 list_for_each_entry_safe(ctx, n, &fl->pending, node) { 1178 list_del(&ctx->node); 1179 fastrpc_context_put(ctx); 1180 } 1181 1182 list_for_each_entry_safe(map, m, &fl->maps, node) { 1183 list_del(&map->node); 1184 fastrpc_map_put(map); 1185 } 1186 1187 list_for_each_entry_safe(buf, b, &fl->mmaps, node) { 1188 list_del(&buf->node); 1189 fastrpc_buf_free(buf); 1190 } 1191 1192 fastrpc_session_free(cctx, fl->sctx); 1193 fastrpc_channel_ctx_put(cctx); 1194 1195 mutex_destroy(&fl->mutex); 1196 kfree(fl); 1197 file->private_data = NULL; 1198 1199 return 0; 1200 } 1201 1202 static int fastrpc_device_open(struct inode *inode, struct file *filp) 1203 { 1204 struct fastrpc_channel_ctx *cctx = miscdev_to_cctx(filp->private_data); 1205 struct fastrpc_user *fl = NULL; 1206 unsigned long flags; 1207 1208 fl = kzalloc(sizeof(*fl), GFP_KERNEL); 1209 if (!fl) 1210 return -ENOMEM; 1211 1212 /* Released in fastrpc_device_release() */ 1213 fastrpc_channel_ctx_get(cctx); 1214 1215 filp->private_data = fl; 1216 spin_lock_init(&fl->lock); 1217 mutex_init(&fl->mutex); 1218 INIT_LIST_HEAD(&fl->pending); 1219 INIT_LIST_HEAD(&fl->maps); 1220 INIT_LIST_HEAD(&fl->mmaps); 1221 INIT_LIST_HEAD(&fl->user); 1222 fl->tgid = current->tgid; 1223 fl->cctx = cctx; 1224 1225 fl->sctx = fastrpc_session_alloc(cctx); 1226 if (!fl->sctx) { 1227 dev_err(&cctx->rpdev->dev, "No session available\n"); 1228 mutex_destroy(&fl->mutex); 1229 kfree(fl); 1230 1231 return -EBUSY; 1232 } 1233 1234 spin_lock_irqsave(&cctx->lock, flags); 1235 list_add_tail(&fl->user, &cctx->users); 1236 spin_unlock_irqrestore(&cctx->lock, flags); 1237 1238 return 0; 1239 } 1240 1241 static int fastrpc_dmabuf_alloc(struct fastrpc_user *fl, char __user *argp) 1242 { 1243 struct fastrpc_alloc_dma_buf bp; 1244 DEFINE_DMA_BUF_EXPORT_INFO(exp_info); 1245 struct fastrpc_buf *buf = NULL; 1246 int err; 1247 1248 if (copy_from_user(&bp, argp, sizeof(bp))) 1249 return -EFAULT; 1250 1251 err = fastrpc_buf_alloc(fl, fl->sctx->dev, bp.size, &buf); 1252 if (err) 1253 return err; 1254 exp_info.ops = &fastrpc_dma_buf_ops; 1255 exp_info.size = bp.size; 1256 exp_info.flags = O_RDWR; 1257 exp_info.priv = buf; 1258 buf->dmabuf = dma_buf_export(&exp_info); 1259 if (IS_ERR(buf->dmabuf)) { 1260 err = PTR_ERR(buf->dmabuf); 1261 fastrpc_buf_free(buf); 1262 return err; 1263 } 1264 1265 bp.fd = dma_buf_fd(buf->dmabuf, O_ACCMODE); 1266 if (bp.fd < 0) { 1267 dma_buf_put(buf->dmabuf); 1268 return -EINVAL; 1269 } 1270 1271 if (copy_to_user(argp, &bp, sizeof(bp))) { 1272 dma_buf_put(buf->dmabuf); 1273 return -EFAULT; 1274 } 1275 1276 return 0; 1277 } 1278 1279 static int fastrpc_init_attach(struct fastrpc_user *fl) 1280 { 1281 struct fastrpc_invoke_args args[1]; 1282 int tgid = fl->tgid; 1283 u32 sc; 1284 1285 args[0].ptr = (u64)(uintptr_t) &tgid; 1286 args[0].length = sizeof(tgid); 1287 args[0].fd = -1; 1288 args[0].reserved = 0; 1289 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_ATTACH, 1, 0); 1290 fl->pd = 0; 1291 1292 return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1293 sc, &args[0]); 1294 } 1295 1296 static int fastrpc_invoke(struct fastrpc_user *fl, char __user *argp) 1297 { 1298 struct fastrpc_invoke_args *args = NULL; 1299 struct fastrpc_invoke inv; 1300 u32 nscalars; 1301 int err; 1302 1303 if (copy_from_user(&inv, argp, sizeof(inv))) 1304 return -EFAULT; 1305 1306 /* nscalars is truncated here to max supported value */ 1307 nscalars = REMOTE_SCALARS_LENGTH(inv.sc); 1308 if (nscalars) { 1309 args = kcalloc(nscalars, sizeof(*args), GFP_KERNEL); 1310 if (!args) 1311 return -ENOMEM; 1312 1313 if (copy_from_user(args, (void __user *)(uintptr_t)inv.args, 1314 nscalars * sizeof(*args))) { 1315 kfree(args); 1316 return -EFAULT; 1317 } 1318 } 1319 1320 err = fastrpc_internal_invoke(fl, false, inv.handle, inv.sc, args); 1321 kfree(args); 1322 1323 return err; 1324 } 1325 1326 static int fastrpc_req_munmap_impl(struct fastrpc_user *fl, 1327 struct fastrpc_req_munmap *req) 1328 { 1329 struct fastrpc_invoke_args args[1] = { [0] = { 0 } }; 1330 struct fastrpc_buf *buf, *b; 1331 struct fastrpc_munmap_req_msg req_msg; 1332 struct device *dev = fl->sctx->dev; 1333 int err; 1334 u32 sc; 1335 1336 spin_lock(&fl->lock); 1337 list_for_each_entry_safe(buf, b, &fl->mmaps, node) { 1338 if ((buf->raddr == req->vaddrout) && (buf->size == req->size)) 1339 break; 1340 buf = NULL; 1341 } 1342 spin_unlock(&fl->lock); 1343 1344 if (!buf) { 1345 dev_err(dev, "mmap not in list\n"); 1346 return -EINVAL; 1347 } 1348 1349 req_msg.pgid = fl->tgid; 1350 req_msg.size = buf->size; 1351 req_msg.vaddr = buf->raddr; 1352 1353 args[0].ptr = (u64) (uintptr_t) &req_msg; 1354 args[0].length = sizeof(req_msg); 1355 1356 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MUNMAP, 1, 0); 1357 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, 1358 &args[0]); 1359 if (!err) { 1360 dev_dbg(dev, "unmmap\tpt 0x%09lx OK\n", buf->raddr); 1361 spin_lock(&fl->lock); 1362 list_del(&buf->node); 1363 spin_unlock(&fl->lock); 1364 fastrpc_buf_free(buf); 1365 } else { 1366 dev_err(dev, "unmmap\tpt 0x%09lx ERROR\n", buf->raddr); 1367 } 1368 1369 return err; 1370 } 1371 1372 static int fastrpc_req_munmap(struct fastrpc_user *fl, char __user *argp) 1373 { 1374 struct fastrpc_req_munmap req; 1375 1376 if (copy_from_user(&req, argp, sizeof(req))) 1377 return -EFAULT; 1378 1379 return fastrpc_req_munmap_impl(fl, &req); 1380 } 1381 1382 static int fastrpc_req_mmap(struct fastrpc_user *fl, char __user *argp) 1383 { 1384 struct fastrpc_invoke_args args[3] = { [0 ... 2] = { 0 } }; 1385 struct fastrpc_buf *buf = NULL; 1386 struct fastrpc_mmap_req_msg req_msg; 1387 struct fastrpc_mmap_rsp_msg rsp_msg; 1388 struct fastrpc_req_munmap req_unmap; 1389 struct fastrpc_phy_page pages; 1390 struct fastrpc_req_mmap req; 1391 struct device *dev = fl->sctx->dev; 1392 int err; 1393 u32 sc; 1394 1395 if (copy_from_user(&req, argp, sizeof(req))) 1396 return -EFAULT; 1397 1398 if (req.flags != ADSP_MMAP_ADD_PAGES) { 1399 dev_err(dev, "flag not supported 0x%x\n", req.flags); 1400 return -EINVAL; 1401 } 1402 1403 if (req.vaddrin) { 1404 dev_err(dev, "adding user allocated pages is not supported\n"); 1405 return -EINVAL; 1406 } 1407 1408 err = fastrpc_buf_alloc(fl, fl->sctx->dev, req.size, &buf); 1409 if (err) { 1410 dev_err(dev, "failed to allocate buffer\n"); 1411 return err; 1412 } 1413 1414 req_msg.pgid = fl->tgid; 1415 req_msg.flags = req.flags; 1416 req_msg.vaddr = req.vaddrin; 1417 req_msg.num = sizeof(pages); 1418 1419 args[0].ptr = (u64) (uintptr_t) &req_msg; 1420 args[0].length = sizeof(req_msg); 1421 1422 pages.addr = buf->phys; 1423 pages.size = buf->size; 1424 1425 args[1].ptr = (u64) (uintptr_t) &pages; 1426 args[1].length = sizeof(pages); 1427 1428 args[2].ptr = (u64) (uintptr_t) &rsp_msg; 1429 args[2].length = sizeof(rsp_msg); 1430 1431 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MMAP, 2, 1); 1432 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, 1433 &args[0]); 1434 if (err) { 1435 dev_err(dev, "mmap error (len 0x%08llx)\n", buf->size); 1436 goto err_invoke; 1437 } 1438 1439 /* update the buffer to be able to deallocate the memory on the DSP */ 1440 buf->raddr = (uintptr_t) rsp_msg.vaddr; 1441 1442 /* let the client know the address to use */ 1443 req.vaddrout = rsp_msg.vaddr; 1444 1445 spin_lock(&fl->lock); 1446 list_add_tail(&buf->node, &fl->mmaps); 1447 spin_unlock(&fl->lock); 1448 1449 if (copy_to_user((void __user *)argp, &req, sizeof(req))) { 1450 /* unmap the memory and release the buffer */ 1451 req_unmap.vaddrout = buf->raddr; 1452 req_unmap.size = buf->size; 1453 fastrpc_req_munmap_impl(fl, &req_unmap); 1454 return -EFAULT; 1455 } 1456 1457 dev_dbg(dev, "mmap\t\tpt 0x%09lx OK [len 0x%08llx]\n", 1458 buf->raddr, buf->size); 1459 1460 return 0; 1461 1462 err_invoke: 1463 fastrpc_buf_free(buf); 1464 1465 return err; 1466 } 1467 1468 static long fastrpc_device_ioctl(struct file *file, unsigned int cmd, 1469 unsigned long arg) 1470 { 1471 struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; 1472 char __user *argp = (char __user *)arg; 1473 int err; 1474 1475 switch (cmd) { 1476 case FASTRPC_IOCTL_INVOKE: 1477 err = fastrpc_invoke(fl, argp); 1478 break; 1479 case FASTRPC_IOCTL_INIT_ATTACH: 1480 err = fastrpc_init_attach(fl); 1481 break; 1482 case FASTRPC_IOCTL_INIT_CREATE: 1483 err = fastrpc_init_create_process(fl, argp); 1484 break; 1485 case FASTRPC_IOCTL_ALLOC_DMA_BUFF: 1486 err = fastrpc_dmabuf_alloc(fl, argp); 1487 break; 1488 case FASTRPC_IOCTL_MMAP: 1489 err = fastrpc_req_mmap(fl, argp); 1490 break; 1491 case FASTRPC_IOCTL_MUNMAP: 1492 err = fastrpc_req_munmap(fl, argp); 1493 break; 1494 default: 1495 err = -ENOTTY; 1496 break; 1497 } 1498 1499 return err; 1500 } 1501 1502 static const struct file_operations fastrpc_fops = { 1503 .open = fastrpc_device_open, 1504 .release = fastrpc_device_release, 1505 .unlocked_ioctl = fastrpc_device_ioctl, 1506 .compat_ioctl = fastrpc_device_ioctl, 1507 }; 1508 1509 static int fastrpc_cb_probe(struct platform_device *pdev) 1510 { 1511 struct fastrpc_channel_ctx *cctx; 1512 struct fastrpc_session_ctx *sess; 1513 struct device *dev = &pdev->dev; 1514 int i, sessions = 0; 1515 unsigned long flags; 1516 int rc; 1517 1518 cctx = dev_get_drvdata(dev->parent); 1519 if (!cctx) 1520 return -EINVAL; 1521 1522 of_property_read_u32(dev->of_node, "qcom,nsessions", &sessions); 1523 1524 spin_lock_irqsave(&cctx->lock, flags); 1525 sess = &cctx->session[cctx->sesscount]; 1526 sess->used = false; 1527 sess->valid = true; 1528 sess->dev = dev; 1529 dev_set_drvdata(dev, sess); 1530 1531 if (of_property_read_u32(dev->of_node, "reg", &sess->sid)) 1532 dev_info(dev, "FastRPC Session ID not specified in DT\n"); 1533 1534 if (sessions > 0) { 1535 struct fastrpc_session_ctx *dup_sess; 1536 1537 for (i = 1; i < sessions; i++) { 1538 if (cctx->sesscount++ >= FASTRPC_MAX_SESSIONS) 1539 break; 1540 dup_sess = &cctx->session[cctx->sesscount]; 1541 memcpy(dup_sess, sess, sizeof(*dup_sess)); 1542 } 1543 } 1544 cctx->sesscount++; 1545 spin_unlock_irqrestore(&cctx->lock, flags); 1546 rc = dma_set_mask(dev, DMA_BIT_MASK(32)); 1547 if (rc) { 1548 dev_err(dev, "32-bit DMA enable failed\n"); 1549 return rc; 1550 } 1551 1552 return 0; 1553 } 1554 1555 static int fastrpc_cb_remove(struct platform_device *pdev) 1556 { 1557 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(pdev->dev.parent); 1558 struct fastrpc_session_ctx *sess = dev_get_drvdata(&pdev->dev); 1559 unsigned long flags; 1560 int i; 1561 1562 spin_lock_irqsave(&cctx->lock, flags); 1563 for (i = 1; i < FASTRPC_MAX_SESSIONS; i++) { 1564 if (cctx->session[i].sid == sess->sid) { 1565 cctx->session[i].valid = false; 1566 cctx->sesscount--; 1567 } 1568 } 1569 spin_unlock_irqrestore(&cctx->lock, flags); 1570 1571 return 0; 1572 } 1573 1574 static const struct of_device_id fastrpc_match_table[] = { 1575 { .compatible = "qcom,fastrpc-compute-cb", }, 1576 {} 1577 }; 1578 1579 static struct platform_driver fastrpc_cb_driver = { 1580 .probe = fastrpc_cb_probe, 1581 .remove = fastrpc_cb_remove, 1582 .driver = { 1583 .name = "qcom,fastrpc-cb", 1584 .of_match_table = fastrpc_match_table, 1585 .suppress_bind_attrs = true, 1586 }, 1587 }; 1588 1589 static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev) 1590 { 1591 struct device *rdev = &rpdev->dev; 1592 struct fastrpc_channel_ctx *data; 1593 int i, err, domain_id = -1; 1594 const char *domain; 1595 1596 err = of_property_read_string(rdev->of_node, "label", &domain); 1597 if (err) { 1598 dev_info(rdev, "FastRPC Domain not specified in DT\n"); 1599 return err; 1600 } 1601 1602 for (i = 0; i <= CDSP_DOMAIN_ID; i++) { 1603 if (!strcmp(domains[i], domain)) { 1604 domain_id = i; 1605 break; 1606 } 1607 } 1608 1609 if (domain_id < 0) { 1610 dev_info(rdev, "FastRPC Invalid Domain ID %d\n", domain_id); 1611 return -EINVAL; 1612 } 1613 1614 data = kzalloc(sizeof(*data), GFP_KERNEL); 1615 if (!data) 1616 return -ENOMEM; 1617 1618 data->miscdev.minor = MISC_DYNAMIC_MINOR; 1619 data->miscdev.name = devm_kasprintf(rdev, GFP_KERNEL, "fastrpc-%s", 1620 domains[domain_id]); 1621 data->miscdev.fops = &fastrpc_fops; 1622 err = misc_register(&data->miscdev); 1623 if (err) { 1624 kfree(data); 1625 return err; 1626 } 1627 1628 kref_init(&data->refcount); 1629 1630 dev_set_drvdata(&rpdev->dev, data); 1631 dma_set_mask_and_coherent(rdev, DMA_BIT_MASK(32)); 1632 INIT_LIST_HEAD(&data->users); 1633 spin_lock_init(&data->lock); 1634 idr_init(&data->ctx_idr); 1635 data->domain_id = domain_id; 1636 data->rpdev = rpdev; 1637 1638 return of_platform_populate(rdev->of_node, NULL, NULL, rdev); 1639 } 1640 1641 static void fastrpc_notify_users(struct fastrpc_user *user) 1642 { 1643 struct fastrpc_invoke_ctx *ctx; 1644 1645 spin_lock(&user->lock); 1646 list_for_each_entry(ctx, &user->pending, node) 1647 complete(&ctx->work); 1648 spin_unlock(&user->lock); 1649 } 1650 1651 static void fastrpc_rpmsg_remove(struct rpmsg_device *rpdev) 1652 { 1653 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); 1654 struct fastrpc_user *user; 1655 unsigned long flags; 1656 1657 spin_lock_irqsave(&cctx->lock, flags); 1658 list_for_each_entry(user, &cctx->users, user) 1659 fastrpc_notify_users(user); 1660 spin_unlock_irqrestore(&cctx->lock, flags); 1661 1662 misc_deregister(&cctx->miscdev); 1663 of_platform_depopulate(&rpdev->dev); 1664 1665 cctx->rpdev = NULL; 1666 fastrpc_channel_ctx_put(cctx); 1667 } 1668 1669 static int fastrpc_rpmsg_callback(struct rpmsg_device *rpdev, void *data, 1670 int len, void *priv, u32 addr) 1671 { 1672 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); 1673 struct fastrpc_invoke_rsp *rsp = data; 1674 struct fastrpc_invoke_ctx *ctx; 1675 unsigned long flags; 1676 unsigned long ctxid; 1677 1678 if (len < sizeof(*rsp)) 1679 return -EINVAL; 1680 1681 ctxid = ((rsp->ctx & FASTRPC_CTXID_MASK) >> 4); 1682 1683 spin_lock_irqsave(&cctx->lock, flags); 1684 ctx = idr_find(&cctx->ctx_idr, ctxid); 1685 spin_unlock_irqrestore(&cctx->lock, flags); 1686 1687 if (!ctx) { 1688 dev_err(&rpdev->dev, "No context ID matches response\n"); 1689 return -ENOENT; 1690 } 1691 1692 ctx->retval = rsp->retval; 1693 complete(&ctx->work); 1694 1695 /* 1696 * The DMA buffer associated with the context cannot be freed in 1697 * interrupt context so schedule it through a worker thread to 1698 * avoid a kernel BUG. 1699 */ 1700 schedule_work(&ctx->put_work); 1701 1702 return 0; 1703 } 1704 1705 static const struct of_device_id fastrpc_rpmsg_of_match[] = { 1706 { .compatible = "qcom,fastrpc" }, 1707 { }, 1708 }; 1709 MODULE_DEVICE_TABLE(of, fastrpc_rpmsg_of_match); 1710 1711 static struct rpmsg_driver fastrpc_driver = { 1712 .probe = fastrpc_rpmsg_probe, 1713 .remove = fastrpc_rpmsg_remove, 1714 .callback = fastrpc_rpmsg_callback, 1715 .drv = { 1716 .name = "qcom,fastrpc", 1717 .of_match_table = fastrpc_rpmsg_of_match, 1718 }, 1719 }; 1720 1721 static int fastrpc_init(void) 1722 { 1723 int ret; 1724 1725 ret = platform_driver_register(&fastrpc_cb_driver); 1726 if (ret < 0) { 1727 pr_err("fastrpc: failed to register cb driver\n"); 1728 return ret; 1729 } 1730 1731 ret = register_rpmsg_driver(&fastrpc_driver); 1732 if (ret < 0) { 1733 pr_err("fastrpc: failed to register rpmsg driver\n"); 1734 platform_driver_unregister(&fastrpc_cb_driver); 1735 return ret; 1736 } 1737 1738 return 0; 1739 } 1740 module_init(fastrpc_init); 1741 1742 static void fastrpc_exit(void) 1743 { 1744 platform_driver_unregister(&fastrpc_cb_driver); 1745 unregister_rpmsg_driver(&fastrpc_driver); 1746 } 1747 module_exit(fastrpc_exit); 1748 1749 MODULE_LICENSE("GPL v2"); 1750