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_kmap(struct dma_buf *dmabuf, unsigned long pgnum) 585 { 586 struct fastrpc_buf *buf = dmabuf->priv; 587 588 return buf->virt ? buf->virt + pgnum * PAGE_SIZE : NULL; 589 } 590 591 static void *fastrpc_vmap(struct dma_buf *dmabuf) 592 { 593 struct fastrpc_buf *buf = dmabuf->priv; 594 595 return buf->virt; 596 } 597 598 static int fastrpc_mmap(struct dma_buf *dmabuf, 599 struct vm_area_struct *vma) 600 { 601 struct fastrpc_buf *buf = dmabuf->priv; 602 size_t size = vma->vm_end - vma->vm_start; 603 604 return dma_mmap_coherent(buf->dev, vma, buf->virt, 605 FASTRPC_PHYS(buf->phys), size); 606 } 607 608 static const struct dma_buf_ops fastrpc_dma_buf_ops = { 609 .attach = fastrpc_dma_buf_attach, 610 .detach = fastrpc_dma_buf_detatch, 611 .map_dma_buf = fastrpc_map_dma_buf, 612 .unmap_dma_buf = fastrpc_unmap_dma_buf, 613 .mmap = fastrpc_mmap, 614 .map = fastrpc_kmap, 615 .vmap = fastrpc_vmap, 616 .release = fastrpc_release, 617 }; 618 619 static int fastrpc_map_create(struct fastrpc_user *fl, int fd, 620 u64 len, struct fastrpc_map **ppmap) 621 { 622 struct fastrpc_session_ctx *sess = fl->sctx; 623 struct fastrpc_map *map = NULL; 624 int err = 0; 625 626 if (!fastrpc_map_find(fl, fd, ppmap)) 627 return 0; 628 629 map = kzalloc(sizeof(*map), GFP_KERNEL); 630 if (!map) 631 return -ENOMEM; 632 633 INIT_LIST_HEAD(&map->node); 634 map->fl = fl; 635 map->fd = fd; 636 map->buf = dma_buf_get(fd); 637 if (IS_ERR(map->buf)) { 638 err = PTR_ERR(map->buf); 639 goto get_err; 640 } 641 642 map->attach = dma_buf_attach(map->buf, sess->dev); 643 if (IS_ERR(map->attach)) { 644 dev_err(sess->dev, "Failed to attach dmabuf\n"); 645 err = PTR_ERR(map->attach); 646 goto attach_err; 647 } 648 649 map->table = dma_buf_map_attachment(map->attach, DMA_BIDIRECTIONAL); 650 if (IS_ERR(map->table)) { 651 err = PTR_ERR(map->table); 652 goto map_err; 653 } 654 655 map->phys = sg_dma_address(map->table->sgl); 656 map->phys += ((u64)fl->sctx->sid << 32); 657 map->size = len; 658 map->va = sg_virt(map->table->sgl); 659 map->len = len; 660 kref_init(&map->refcount); 661 662 spin_lock(&fl->lock); 663 list_add_tail(&map->node, &fl->maps); 664 spin_unlock(&fl->lock); 665 *ppmap = map; 666 667 return 0; 668 669 map_err: 670 dma_buf_detach(map->buf, map->attach); 671 attach_err: 672 dma_buf_put(map->buf); 673 get_err: 674 kfree(map); 675 676 return err; 677 } 678 679 /* 680 * Fastrpc payload buffer with metadata looks like: 681 * 682 * >>>>>> START of METADATA <<<<<<<<< 683 * +---------------------------------+ 684 * | Arguments | 685 * | type:(struct fastrpc_remote_arg)| 686 * | (0 - N) | 687 * +---------------------------------+ 688 * | Invoke Buffer list | 689 * | type:(struct fastrpc_invoke_buf)| 690 * | (0 - N) | 691 * +---------------------------------+ 692 * | Page info list | 693 * | type:(struct fastrpc_phy_page) | 694 * | (0 - N) | 695 * +---------------------------------+ 696 * | Optional info | 697 * |(can be specific to SoC/Firmware)| 698 * +---------------------------------+ 699 * >>>>>>>> END of METADATA <<<<<<<<< 700 * +---------------------------------+ 701 * | Inline ARGS | 702 * | (0-N) | 703 * +---------------------------------+ 704 */ 705 706 static int fastrpc_get_meta_size(struct fastrpc_invoke_ctx *ctx) 707 { 708 int size = 0; 709 710 size = (sizeof(struct fastrpc_remote_arg) + 711 sizeof(struct fastrpc_invoke_buf) + 712 sizeof(struct fastrpc_phy_page)) * ctx->nscalars + 713 sizeof(u64) * FASTRPC_MAX_FDLIST + 714 sizeof(u32) * FASTRPC_MAX_CRCLIST; 715 716 return size; 717 } 718 719 static u64 fastrpc_get_payload_size(struct fastrpc_invoke_ctx *ctx, int metalen) 720 { 721 u64 size = 0; 722 int i; 723 724 size = ALIGN(metalen, FASTRPC_ALIGN); 725 for (i = 0; i < ctx->nscalars; i++) { 726 if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1) { 727 728 if (ctx->olaps[i].offset == 0) 729 size = ALIGN(size, FASTRPC_ALIGN); 730 731 size += (ctx->olaps[i].mend - ctx->olaps[i].mstart); 732 } 733 } 734 735 return size; 736 } 737 738 static int fastrpc_create_maps(struct fastrpc_invoke_ctx *ctx) 739 { 740 struct device *dev = ctx->fl->sctx->dev; 741 int i, err; 742 743 for (i = 0; i < ctx->nscalars; ++i) { 744 /* Make sure reserved field is set to 0 */ 745 if (ctx->args[i].reserved) 746 return -EINVAL; 747 748 if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1 || 749 ctx->args[i].length == 0) 750 continue; 751 752 err = fastrpc_map_create(ctx->fl, ctx->args[i].fd, 753 ctx->args[i].length, &ctx->maps[i]); 754 if (err) { 755 dev_err(dev, "Error Creating map %d\n", err); 756 return -EINVAL; 757 } 758 759 } 760 return 0; 761 } 762 763 static int fastrpc_get_args(u32 kernel, struct fastrpc_invoke_ctx *ctx) 764 { 765 struct device *dev = ctx->fl->sctx->dev; 766 struct fastrpc_remote_arg *rpra; 767 struct fastrpc_invoke_buf *list; 768 struct fastrpc_phy_page *pages; 769 int inbufs, i, oix, err = 0; 770 u64 len, rlen, pkt_size; 771 u64 pg_start, pg_end; 772 uintptr_t args; 773 int metalen; 774 775 inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); 776 metalen = fastrpc_get_meta_size(ctx); 777 pkt_size = fastrpc_get_payload_size(ctx, metalen); 778 779 err = fastrpc_create_maps(ctx); 780 if (err) 781 return err; 782 783 ctx->msg_sz = pkt_size; 784 785 err = fastrpc_buf_alloc(ctx->fl, dev, pkt_size, &ctx->buf); 786 if (err) 787 return err; 788 789 rpra = ctx->buf->virt; 790 list = ctx->buf->virt + ctx->nscalars * sizeof(*rpra); 791 pages = ctx->buf->virt + ctx->nscalars * (sizeof(*list) + 792 sizeof(*rpra)); 793 args = (uintptr_t)ctx->buf->virt + metalen; 794 rlen = pkt_size - metalen; 795 ctx->rpra = rpra; 796 797 for (oix = 0; oix < ctx->nbufs; ++oix) { 798 int mlen; 799 800 i = ctx->olaps[oix].raix; 801 len = ctx->args[i].length; 802 803 rpra[i].pv = 0; 804 rpra[i].len = len; 805 list[i].num = len ? 1 : 0; 806 list[i].pgidx = i; 807 808 if (!len) 809 continue; 810 811 if (ctx->maps[i]) { 812 struct vm_area_struct *vma = NULL; 813 814 rpra[i].pv = (u64) ctx->args[i].ptr; 815 pages[i].addr = ctx->maps[i]->phys; 816 817 vma = find_vma(current->mm, ctx->args[i].ptr); 818 if (vma) 819 pages[i].addr += ctx->args[i].ptr - 820 vma->vm_start; 821 822 pg_start = (ctx->args[i].ptr & PAGE_MASK) >> PAGE_SHIFT; 823 pg_end = ((ctx->args[i].ptr + len - 1) & PAGE_MASK) >> 824 PAGE_SHIFT; 825 pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; 826 827 } else { 828 829 if (ctx->olaps[oix].offset == 0) { 830 rlen -= ALIGN(args, FASTRPC_ALIGN) - args; 831 args = ALIGN(args, FASTRPC_ALIGN); 832 } 833 834 mlen = ctx->olaps[oix].mend - ctx->olaps[oix].mstart; 835 836 if (rlen < mlen) 837 goto bail; 838 839 rpra[i].pv = args - ctx->olaps[oix].offset; 840 pages[i].addr = ctx->buf->phys - 841 ctx->olaps[oix].offset + 842 (pkt_size - rlen); 843 pages[i].addr = pages[i].addr & PAGE_MASK; 844 845 pg_start = (args & PAGE_MASK) >> PAGE_SHIFT; 846 pg_end = ((args + len - 1) & PAGE_MASK) >> PAGE_SHIFT; 847 pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; 848 args = args + mlen; 849 rlen -= mlen; 850 } 851 852 if (i < inbufs && !ctx->maps[i]) { 853 void *dst = (void *)(uintptr_t)rpra[i].pv; 854 void *src = (void *)(uintptr_t)ctx->args[i].ptr; 855 856 if (!kernel) { 857 if (copy_from_user(dst, (void __user *)src, 858 len)) { 859 err = -EFAULT; 860 goto bail; 861 } 862 } else { 863 memcpy(dst, src, len); 864 } 865 } 866 } 867 868 for (i = ctx->nbufs; i < ctx->nscalars; ++i) { 869 rpra[i].pv = (u64) ctx->args[i].ptr; 870 rpra[i].len = ctx->args[i].length; 871 list[i].num = ctx->args[i].length ? 1 : 0; 872 list[i].pgidx = i; 873 pages[i].addr = ctx->maps[i]->phys; 874 pages[i].size = ctx->maps[i]->size; 875 } 876 877 bail: 878 if (err) 879 dev_err(dev, "Error: get invoke args failed:%d\n", err); 880 881 return err; 882 } 883 884 static int fastrpc_put_args(struct fastrpc_invoke_ctx *ctx, 885 u32 kernel) 886 { 887 struct fastrpc_remote_arg *rpra = ctx->rpra; 888 int i, inbufs; 889 890 inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); 891 892 for (i = inbufs; i < ctx->nbufs; ++i) { 893 void *src = (void *)(uintptr_t)rpra[i].pv; 894 void *dst = (void *)(uintptr_t)ctx->args[i].ptr; 895 u64 len = rpra[i].len; 896 897 if (!kernel) { 898 if (copy_to_user((void __user *)dst, src, len)) 899 return -EFAULT; 900 } else { 901 memcpy(dst, src, len); 902 } 903 } 904 905 return 0; 906 } 907 908 static int fastrpc_invoke_send(struct fastrpc_session_ctx *sctx, 909 struct fastrpc_invoke_ctx *ctx, 910 u32 kernel, uint32_t handle) 911 { 912 struct fastrpc_channel_ctx *cctx; 913 struct fastrpc_user *fl = ctx->fl; 914 struct fastrpc_msg *msg = &ctx->msg; 915 916 cctx = fl->cctx; 917 msg->pid = fl->tgid; 918 msg->tid = current->pid; 919 920 if (kernel) 921 msg->pid = 0; 922 923 msg->ctx = ctx->ctxid | fl->pd; 924 msg->handle = handle; 925 msg->sc = ctx->sc; 926 msg->addr = ctx->buf ? ctx->buf->phys : 0; 927 msg->size = roundup(ctx->msg_sz, PAGE_SIZE); 928 fastrpc_context_get(ctx); 929 930 return rpmsg_send(cctx->rpdev->ept, (void *)msg, sizeof(*msg)); 931 } 932 933 static int fastrpc_internal_invoke(struct fastrpc_user *fl, u32 kernel, 934 u32 handle, u32 sc, 935 struct fastrpc_invoke_args *args) 936 { 937 struct fastrpc_invoke_ctx *ctx = NULL; 938 int err = 0; 939 940 if (!fl->sctx) 941 return -EINVAL; 942 943 if (!fl->cctx->rpdev) 944 return -EPIPE; 945 946 ctx = fastrpc_context_alloc(fl, kernel, sc, args); 947 if (IS_ERR(ctx)) 948 return PTR_ERR(ctx); 949 950 if (ctx->nscalars) { 951 err = fastrpc_get_args(kernel, ctx); 952 if (err) 953 goto bail; 954 } 955 956 /* make sure that all CPU memory writes are seen by DSP */ 957 dma_wmb(); 958 /* Send invoke buffer to remote dsp */ 959 err = fastrpc_invoke_send(fl->sctx, ctx, kernel, handle); 960 if (err) 961 goto bail; 962 963 if (kernel) { 964 if (!wait_for_completion_timeout(&ctx->work, 10 * HZ)) 965 err = -ETIMEDOUT; 966 } else { 967 err = wait_for_completion_interruptible(&ctx->work); 968 } 969 970 if (err) 971 goto bail; 972 973 /* Check the response from remote dsp */ 974 err = ctx->retval; 975 if (err) 976 goto bail; 977 978 if (ctx->nscalars) { 979 /* make sure that all memory writes by DSP are seen by CPU */ 980 dma_rmb(); 981 /* populate all the output buffers with results */ 982 err = fastrpc_put_args(ctx, kernel); 983 if (err) 984 goto bail; 985 } 986 987 bail: 988 if (err != -ERESTARTSYS && err != -ETIMEDOUT) { 989 /* We are done with this compute context */ 990 spin_lock(&fl->lock); 991 list_del(&ctx->node); 992 spin_unlock(&fl->lock); 993 fastrpc_context_put(ctx); 994 } 995 if (err) 996 dev_dbg(fl->sctx->dev, "Error: Invoke Failed %d\n", err); 997 998 return err; 999 } 1000 1001 static int fastrpc_init_create_process(struct fastrpc_user *fl, 1002 char __user *argp) 1003 { 1004 struct fastrpc_init_create init; 1005 struct fastrpc_invoke_args *args; 1006 struct fastrpc_phy_page pages[1]; 1007 struct fastrpc_map *map = NULL; 1008 struct fastrpc_buf *imem = NULL; 1009 int memlen; 1010 int err; 1011 struct { 1012 int pgid; 1013 u32 namelen; 1014 u32 filelen; 1015 u32 pageslen; 1016 u32 attrs; 1017 u32 siglen; 1018 } inbuf; 1019 u32 sc; 1020 1021 args = kcalloc(FASTRPC_CREATE_PROCESS_NARGS, sizeof(*args), GFP_KERNEL); 1022 if (!args) 1023 return -ENOMEM; 1024 1025 if (copy_from_user(&init, argp, sizeof(init))) { 1026 err = -EFAULT; 1027 goto err; 1028 } 1029 1030 if (init.filelen > INIT_FILELEN_MAX) { 1031 err = -EINVAL; 1032 goto err; 1033 } 1034 1035 inbuf.pgid = fl->tgid; 1036 inbuf.namelen = strlen(current->comm) + 1; 1037 inbuf.filelen = init.filelen; 1038 inbuf.pageslen = 1; 1039 inbuf.attrs = init.attrs; 1040 inbuf.siglen = init.siglen; 1041 fl->pd = 1; 1042 1043 if (init.filelen && init.filefd) { 1044 err = fastrpc_map_create(fl, init.filefd, init.filelen, &map); 1045 if (err) 1046 goto err; 1047 } 1048 1049 memlen = ALIGN(max(INIT_FILELEN_MAX, (int)init.filelen * 4), 1050 1024 * 1024); 1051 err = fastrpc_buf_alloc(fl, fl->sctx->dev, memlen, 1052 &imem); 1053 if (err) 1054 goto err_alloc; 1055 1056 fl->init_mem = imem; 1057 args[0].ptr = (u64)(uintptr_t)&inbuf; 1058 args[0].length = sizeof(inbuf); 1059 args[0].fd = -1; 1060 1061 args[1].ptr = (u64)(uintptr_t)current->comm; 1062 args[1].length = inbuf.namelen; 1063 args[1].fd = -1; 1064 1065 args[2].ptr = (u64) init.file; 1066 args[2].length = inbuf.filelen; 1067 args[2].fd = init.filefd; 1068 1069 pages[0].addr = imem->phys; 1070 pages[0].size = imem->size; 1071 1072 args[3].ptr = (u64)(uintptr_t) pages; 1073 args[3].length = 1 * sizeof(*pages); 1074 args[3].fd = -1; 1075 1076 args[4].ptr = (u64)(uintptr_t)&inbuf.attrs; 1077 args[4].length = sizeof(inbuf.attrs); 1078 args[4].fd = -1; 1079 1080 args[5].ptr = (u64)(uintptr_t) &inbuf.siglen; 1081 args[5].length = sizeof(inbuf.siglen); 1082 args[5].fd = -1; 1083 1084 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE, 4, 0); 1085 if (init.attrs) 1086 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE_ATTR, 6, 0); 1087 1088 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1089 sc, args); 1090 if (err) 1091 goto err_invoke; 1092 1093 kfree(args); 1094 1095 return 0; 1096 1097 err_invoke: 1098 fl->init_mem = NULL; 1099 fastrpc_buf_free(imem); 1100 err_alloc: 1101 if (map) { 1102 spin_lock(&fl->lock); 1103 list_del(&map->node); 1104 spin_unlock(&fl->lock); 1105 fastrpc_map_put(map); 1106 } 1107 err: 1108 kfree(args); 1109 1110 return err; 1111 } 1112 1113 static struct fastrpc_session_ctx *fastrpc_session_alloc( 1114 struct fastrpc_channel_ctx *cctx) 1115 { 1116 struct fastrpc_session_ctx *session = NULL; 1117 unsigned long flags; 1118 int i; 1119 1120 spin_lock_irqsave(&cctx->lock, flags); 1121 for (i = 0; i < cctx->sesscount; i++) { 1122 if (!cctx->session[i].used && cctx->session[i].valid) { 1123 cctx->session[i].used = true; 1124 session = &cctx->session[i]; 1125 break; 1126 } 1127 } 1128 spin_unlock_irqrestore(&cctx->lock, flags); 1129 1130 return session; 1131 } 1132 1133 static void fastrpc_session_free(struct fastrpc_channel_ctx *cctx, 1134 struct fastrpc_session_ctx *session) 1135 { 1136 unsigned long flags; 1137 1138 spin_lock_irqsave(&cctx->lock, flags); 1139 session->used = false; 1140 spin_unlock_irqrestore(&cctx->lock, flags); 1141 } 1142 1143 static int fastrpc_release_current_dsp_process(struct fastrpc_user *fl) 1144 { 1145 struct fastrpc_invoke_args args[1]; 1146 int tgid = 0; 1147 u32 sc; 1148 1149 tgid = fl->tgid; 1150 args[0].ptr = (u64)(uintptr_t) &tgid; 1151 args[0].length = sizeof(tgid); 1152 args[0].fd = -1; 1153 args[0].reserved = 0; 1154 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_RELEASE, 1, 0); 1155 1156 return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1157 sc, &args[0]); 1158 } 1159 1160 static int fastrpc_device_release(struct inode *inode, struct file *file) 1161 { 1162 struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; 1163 struct fastrpc_channel_ctx *cctx = fl->cctx; 1164 struct fastrpc_invoke_ctx *ctx, *n; 1165 struct fastrpc_map *map, *m; 1166 struct fastrpc_buf *buf, *b; 1167 unsigned long flags; 1168 1169 fastrpc_release_current_dsp_process(fl); 1170 1171 spin_lock_irqsave(&cctx->lock, flags); 1172 list_del(&fl->user); 1173 spin_unlock_irqrestore(&cctx->lock, flags); 1174 1175 if (fl->init_mem) 1176 fastrpc_buf_free(fl->init_mem); 1177 1178 list_for_each_entry_safe(ctx, n, &fl->pending, node) { 1179 list_del(&ctx->node); 1180 fastrpc_context_put(ctx); 1181 } 1182 1183 list_for_each_entry_safe(map, m, &fl->maps, node) { 1184 list_del(&map->node); 1185 fastrpc_map_put(map); 1186 } 1187 1188 list_for_each_entry_safe(buf, b, &fl->mmaps, node) { 1189 list_del(&buf->node); 1190 fastrpc_buf_free(buf); 1191 } 1192 1193 fastrpc_session_free(cctx, fl->sctx); 1194 fastrpc_channel_ctx_put(cctx); 1195 1196 mutex_destroy(&fl->mutex); 1197 kfree(fl); 1198 file->private_data = NULL; 1199 1200 return 0; 1201 } 1202 1203 static int fastrpc_device_open(struct inode *inode, struct file *filp) 1204 { 1205 struct fastrpc_channel_ctx *cctx = miscdev_to_cctx(filp->private_data); 1206 struct fastrpc_user *fl = NULL; 1207 unsigned long flags; 1208 1209 fl = kzalloc(sizeof(*fl), GFP_KERNEL); 1210 if (!fl) 1211 return -ENOMEM; 1212 1213 /* Released in fastrpc_device_release() */ 1214 fastrpc_channel_ctx_get(cctx); 1215 1216 filp->private_data = fl; 1217 spin_lock_init(&fl->lock); 1218 mutex_init(&fl->mutex); 1219 INIT_LIST_HEAD(&fl->pending); 1220 INIT_LIST_HEAD(&fl->maps); 1221 INIT_LIST_HEAD(&fl->mmaps); 1222 INIT_LIST_HEAD(&fl->user); 1223 fl->tgid = current->tgid; 1224 fl->cctx = cctx; 1225 1226 fl->sctx = fastrpc_session_alloc(cctx); 1227 if (!fl->sctx) { 1228 dev_err(&cctx->rpdev->dev, "No session available\n"); 1229 mutex_destroy(&fl->mutex); 1230 kfree(fl); 1231 1232 return -EBUSY; 1233 } 1234 1235 spin_lock_irqsave(&cctx->lock, flags); 1236 list_add_tail(&fl->user, &cctx->users); 1237 spin_unlock_irqrestore(&cctx->lock, flags); 1238 1239 return 0; 1240 } 1241 1242 static int fastrpc_dmabuf_alloc(struct fastrpc_user *fl, char __user *argp) 1243 { 1244 struct fastrpc_alloc_dma_buf bp; 1245 DEFINE_DMA_BUF_EXPORT_INFO(exp_info); 1246 struct fastrpc_buf *buf = NULL; 1247 int err; 1248 1249 if (copy_from_user(&bp, argp, sizeof(bp))) 1250 return -EFAULT; 1251 1252 err = fastrpc_buf_alloc(fl, fl->sctx->dev, bp.size, &buf); 1253 if (err) 1254 return err; 1255 exp_info.ops = &fastrpc_dma_buf_ops; 1256 exp_info.size = bp.size; 1257 exp_info.flags = O_RDWR; 1258 exp_info.priv = buf; 1259 buf->dmabuf = dma_buf_export(&exp_info); 1260 if (IS_ERR(buf->dmabuf)) { 1261 err = PTR_ERR(buf->dmabuf); 1262 fastrpc_buf_free(buf); 1263 return err; 1264 } 1265 1266 bp.fd = dma_buf_fd(buf->dmabuf, O_ACCMODE); 1267 if (bp.fd < 0) { 1268 dma_buf_put(buf->dmabuf); 1269 return -EINVAL; 1270 } 1271 1272 if (copy_to_user(argp, &bp, sizeof(bp))) { 1273 dma_buf_put(buf->dmabuf); 1274 return -EFAULT; 1275 } 1276 1277 return 0; 1278 } 1279 1280 static int fastrpc_init_attach(struct fastrpc_user *fl) 1281 { 1282 struct fastrpc_invoke_args args[1]; 1283 int tgid = fl->tgid; 1284 u32 sc; 1285 1286 args[0].ptr = (u64)(uintptr_t) &tgid; 1287 args[0].length = sizeof(tgid); 1288 args[0].fd = -1; 1289 args[0].reserved = 0; 1290 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_ATTACH, 1, 0); 1291 fl->pd = 0; 1292 1293 return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1294 sc, &args[0]); 1295 } 1296 1297 static int fastrpc_invoke(struct fastrpc_user *fl, char __user *argp) 1298 { 1299 struct fastrpc_invoke_args *args = NULL; 1300 struct fastrpc_invoke inv; 1301 u32 nscalars; 1302 int err; 1303 1304 if (copy_from_user(&inv, argp, sizeof(inv))) 1305 return -EFAULT; 1306 1307 /* nscalars is truncated here to max supported value */ 1308 nscalars = REMOTE_SCALARS_LENGTH(inv.sc); 1309 if (nscalars) { 1310 args = kcalloc(nscalars, sizeof(*args), GFP_KERNEL); 1311 if (!args) 1312 return -ENOMEM; 1313 1314 if (copy_from_user(args, (void __user *)(uintptr_t)inv.args, 1315 nscalars * sizeof(*args))) { 1316 kfree(args); 1317 return -EFAULT; 1318 } 1319 } 1320 1321 err = fastrpc_internal_invoke(fl, false, inv.handle, inv.sc, args); 1322 kfree(args); 1323 1324 return err; 1325 } 1326 1327 static int fastrpc_req_munmap_impl(struct fastrpc_user *fl, 1328 struct fastrpc_req_munmap *req) 1329 { 1330 struct fastrpc_invoke_args args[1] = { [0] = { 0 } }; 1331 struct fastrpc_buf *buf, *b; 1332 struct fastrpc_munmap_req_msg req_msg; 1333 struct device *dev = fl->sctx->dev; 1334 int err; 1335 u32 sc; 1336 1337 spin_lock(&fl->lock); 1338 list_for_each_entry_safe(buf, b, &fl->mmaps, node) { 1339 if ((buf->raddr == req->vaddrout) && (buf->size == req->size)) 1340 break; 1341 buf = NULL; 1342 } 1343 spin_unlock(&fl->lock); 1344 1345 if (!buf) { 1346 dev_err(dev, "mmap not in list\n"); 1347 return -EINVAL; 1348 } 1349 1350 req_msg.pgid = fl->tgid; 1351 req_msg.size = buf->size; 1352 req_msg.vaddr = buf->raddr; 1353 1354 args[0].ptr = (u64) (uintptr_t) &req_msg; 1355 args[0].length = sizeof(req_msg); 1356 1357 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MUNMAP, 1, 0); 1358 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, 1359 &args[0]); 1360 if (!err) { 1361 dev_dbg(dev, "unmmap\tpt 0x%09lx OK\n", buf->raddr); 1362 spin_lock(&fl->lock); 1363 list_del(&buf->node); 1364 spin_unlock(&fl->lock); 1365 fastrpc_buf_free(buf); 1366 } else { 1367 dev_err(dev, "unmmap\tpt 0x%09lx ERROR\n", buf->raddr); 1368 } 1369 1370 return err; 1371 } 1372 1373 static int fastrpc_req_munmap(struct fastrpc_user *fl, char __user *argp) 1374 { 1375 struct fastrpc_req_munmap req; 1376 1377 if (copy_from_user(&req, argp, sizeof(req))) 1378 return -EFAULT; 1379 1380 return fastrpc_req_munmap_impl(fl, &req); 1381 } 1382 1383 static int fastrpc_req_mmap(struct fastrpc_user *fl, char __user *argp) 1384 { 1385 struct fastrpc_invoke_args args[3] = { [0 ... 2] = { 0 } }; 1386 struct fastrpc_buf *buf = NULL; 1387 struct fastrpc_mmap_req_msg req_msg; 1388 struct fastrpc_mmap_rsp_msg rsp_msg; 1389 struct fastrpc_req_munmap req_unmap; 1390 struct fastrpc_phy_page pages; 1391 struct fastrpc_req_mmap req; 1392 struct device *dev = fl->sctx->dev; 1393 int err; 1394 u32 sc; 1395 1396 if (copy_from_user(&req, argp, sizeof(req))) 1397 return -EFAULT; 1398 1399 if (req.flags != ADSP_MMAP_ADD_PAGES) { 1400 dev_err(dev, "flag not supported 0x%x\n", req.flags); 1401 return -EINVAL; 1402 } 1403 1404 if (req.vaddrin) { 1405 dev_err(dev, "adding user allocated pages is not supported\n"); 1406 return -EINVAL; 1407 } 1408 1409 err = fastrpc_buf_alloc(fl, fl->sctx->dev, req.size, &buf); 1410 if (err) { 1411 dev_err(dev, "failed to allocate buffer\n"); 1412 return err; 1413 } 1414 1415 req_msg.pgid = fl->tgid; 1416 req_msg.flags = req.flags; 1417 req_msg.vaddr = req.vaddrin; 1418 req_msg.num = sizeof(pages); 1419 1420 args[0].ptr = (u64) (uintptr_t) &req_msg; 1421 args[0].length = sizeof(req_msg); 1422 1423 pages.addr = buf->phys; 1424 pages.size = buf->size; 1425 1426 args[1].ptr = (u64) (uintptr_t) &pages; 1427 args[1].length = sizeof(pages); 1428 1429 args[2].ptr = (u64) (uintptr_t) &rsp_msg; 1430 args[2].length = sizeof(rsp_msg); 1431 1432 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MMAP, 2, 1); 1433 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, 1434 &args[0]); 1435 if (err) { 1436 dev_err(dev, "mmap error (len 0x%08llx)\n", buf->size); 1437 goto err_invoke; 1438 } 1439 1440 /* update the buffer to be able to deallocate the memory on the DSP */ 1441 buf->raddr = (uintptr_t) rsp_msg.vaddr; 1442 1443 /* let the client know the address to use */ 1444 req.vaddrout = rsp_msg.vaddr; 1445 1446 spin_lock(&fl->lock); 1447 list_add_tail(&buf->node, &fl->mmaps); 1448 spin_unlock(&fl->lock); 1449 1450 if (copy_to_user((void __user *)argp, &req, sizeof(req))) { 1451 /* unmap the memory and release the buffer */ 1452 req_unmap.vaddrout = buf->raddr; 1453 req_unmap.size = buf->size; 1454 fastrpc_req_munmap_impl(fl, &req_unmap); 1455 return -EFAULT; 1456 } 1457 1458 dev_dbg(dev, "mmap\t\tpt 0x%09lx OK [len 0x%08llx]\n", 1459 buf->raddr, buf->size); 1460 1461 return 0; 1462 1463 err_invoke: 1464 fastrpc_buf_free(buf); 1465 1466 return err; 1467 } 1468 1469 static long fastrpc_device_ioctl(struct file *file, unsigned int cmd, 1470 unsigned long arg) 1471 { 1472 struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; 1473 char __user *argp = (char __user *)arg; 1474 int err; 1475 1476 switch (cmd) { 1477 case FASTRPC_IOCTL_INVOKE: 1478 err = fastrpc_invoke(fl, argp); 1479 break; 1480 case FASTRPC_IOCTL_INIT_ATTACH: 1481 err = fastrpc_init_attach(fl); 1482 break; 1483 case FASTRPC_IOCTL_INIT_CREATE: 1484 err = fastrpc_init_create_process(fl, argp); 1485 break; 1486 case FASTRPC_IOCTL_ALLOC_DMA_BUFF: 1487 err = fastrpc_dmabuf_alloc(fl, argp); 1488 break; 1489 case FASTRPC_IOCTL_MMAP: 1490 err = fastrpc_req_mmap(fl, argp); 1491 break; 1492 case FASTRPC_IOCTL_MUNMAP: 1493 err = fastrpc_req_munmap(fl, argp); 1494 break; 1495 default: 1496 err = -ENOTTY; 1497 break; 1498 } 1499 1500 return err; 1501 } 1502 1503 static const struct file_operations fastrpc_fops = { 1504 .open = fastrpc_device_open, 1505 .release = fastrpc_device_release, 1506 .unlocked_ioctl = fastrpc_device_ioctl, 1507 .compat_ioctl = fastrpc_device_ioctl, 1508 }; 1509 1510 static int fastrpc_cb_probe(struct platform_device *pdev) 1511 { 1512 struct fastrpc_channel_ctx *cctx; 1513 struct fastrpc_session_ctx *sess; 1514 struct device *dev = &pdev->dev; 1515 int i, sessions = 0; 1516 unsigned long flags; 1517 int rc; 1518 1519 cctx = dev_get_drvdata(dev->parent); 1520 if (!cctx) 1521 return -EINVAL; 1522 1523 of_property_read_u32(dev->of_node, "qcom,nsessions", &sessions); 1524 1525 spin_lock_irqsave(&cctx->lock, flags); 1526 sess = &cctx->session[cctx->sesscount]; 1527 sess->used = false; 1528 sess->valid = true; 1529 sess->dev = dev; 1530 dev_set_drvdata(dev, sess); 1531 1532 if (of_property_read_u32(dev->of_node, "reg", &sess->sid)) 1533 dev_info(dev, "FastRPC Session ID not specified in DT\n"); 1534 1535 if (sessions > 0) { 1536 struct fastrpc_session_ctx *dup_sess; 1537 1538 for (i = 1; i < sessions; i++) { 1539 if (cctx->sesscount++ >= FASTRPC_MAX_SESSIONS) 1540 break; 1541 dup_sess = &cctx->session[cctx->sesscount]; 1542 memcpy(dup_sess, sess, sizeof(*dup_sess)); 1543 } 1544 } 1545 cctx->sesscount++; 1546 spin_unlock_irqrestore(&cctx->lock, flags); 1547 rc = dma_set_mask(dev, DMA_BIT_MASK(32)); 1548 if (rc) { 1549 dev_err(dev, "32-bit DMA enable failed\n"); 1550 return rc; 1551 } 1552 1553 return 0; 1554 } 1555 1556 static int fastrpc_cb_remove(struct platform_device *pdev) 1557 { 1558 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(pdev->dev.parent); 1559 struct fastrpc_session_ctx *sess = dev_get_drvdata(&pdev->dev); 1560 unsigned long flags; 1561 int i; 1562 1563 spin_lock_irqsave(&cctx->lock, flags); 1564 for (i = 1; i < FASTRPC_MAX_SESSIONS; i++) { 1565 if (cctx->session[i].sid == sess->sid) { 1566 cctx->session[i].valid = false; 1567 cctx->sesscount--; 1568 } 1569 } 1570 spin_unlock_irqrestore(&cctx->lock, flags); 1571 1572 return 0; 1573 } 1574 1575 static const struct of_device_id fastrpc_match_table[] = { 1576 { .compatible = "qcom,fastrpc-compute-cb", }, 1577 {} 1578 }; 1579 1580 static struct platform_driver fastrpc_cb_driver = { 1581 .probe = fastrpc_cb_probe, 1582 .remove = fastrpc_cb_remove, 1583 .driver = { 1584 .name = "qcom,fastrpc-cb", 1585 .of_match_table = fastrpc_match_table, 1586 .suppress_bind_attrs = true, 1587 }, 1588 }; 1589 1590 static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev) 1591 { 1592 struct device *rdev = &rpdev->dev; 1593 struct fastrpc_channel_ctx *data; 1594 int i, err, domain_id = -1; 1595 const char *domain; 1596 1597 err = of_property_read_string(rdev->of_node, "label", &domain); 1598 if (err) { 1599 dev_info(rdev, "FastRPC Domain not specified in DT\n"); 1600 return err; 1601 } 1602 1603 for (i = 0; i <= CDSP_DOMAIN_ID; i++) { 1604 if (!strcmp(domains[i], domain)) { 1605 domain_id = i; 1606 break; 1607 } 1608 } 1609 1610 if (domain_id < 0) { 1611 dev_info(rdev, "FastRPC Invalid Domain ID %d\n", domain_id); 1612 return -EINVAL; 1613 } 1614 1615 data = kzalloc(sizeof(*data), GFP_KERNEL); 1616 if (!data) 1617 return -ENOMEM; 1618 1619 data->miscdev.minor = MISC_DYNAMIC_MINOR; 1620 data->miscdev.name = devm_kasprintf(rdev, GFP_KERNEL, "fastrpc-%s", 1621 domains[domain_id]); 1622 data->miscdev.fops = &fastrpc_fops; 1623 err = misc_register(&data->miscdev); 1624 if (err) 1625 return err; 1626 1627 kref_init(&data->refcount); 1628 1629 dev_set_drvdata(&rpdev->dev, data); 1630 dma_set_mask_and_coherent(rdev, DMA_BIT_MASK(32)); 1631 INIT_LIST_HEAD(&data->users); 1632 spin_lock_init(&data->lock); 1633 idr_init(&data->ctx_idr); 1634 data->domain_id = domain_id; 1635 data->rpdev = rpdev; 1636 1637 return of_platform_populate(rdev->of_node, NULL, NULL, rdev); 1638 } 1639 1640 static void fastrpc_notify_users(struct fastrpc_user *user) 1641 { 1642 struct fastrpc_invoke_ctx *ctx; 1643 1644 spin_lock(&user->lock); 1645 list_for_each_entry(ctx, &user->pending, node) 1646 complete(&ctx->work); 1647 spin_unlock(&user->lock); 1648 } 1649 1650 static void fastrpc_rpmsg_remove(struct rpmsg_device *rpdev) 1651 { 1652 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); 1653 struct fastrpc_user *user; 1654 unsigned long flags; 1655 1656 spin_lock_irqsave(&cctx->lock, flags); 1657 list_for_each_entry(user, &cctx->users, user) 1658 fastrpc_notify_users(user); 1659 spin_unlock_irqrestore(&cctx->lock, flags); 1660 1661 misc_deregister(&cctx->miscdev); 1662 of_platform_depopulate(&rpdev->dev); 1663 1664 cctx->rpdev = NULL; 1665 fastrpc_channel_ctx_put(cctx); 1666 } 1667 1668 static int fastrpc_rpmsg_callback(struct rpmsg_device *rpdev, void *data, 1669 int len, void *priv, u32 addr) 1670 { 1671 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); 1672 struct fastrpc_invoke_rsp *rsp = data; 1673 struct fastrpc_invoke_ctx *ctx; 1674 unsigned long flags; 1675 unsigned long ctxid; 1676 1677 if (len < sizeof(*rsp)) 1678 return -EINVAL; 1679 1680 ctxid = ((rsp->ctx & FASTRPC_CTXID_MASK) >> 4); 1681 1682 spin_lock_irqsave(&cctx->lock, flags); 1683 ctx = idr_find(&cctx->ctx_idr, ctxid); 1684 spin_unlock_irqrestore(&cctx->lock, flags); 1685 1686 if (!ctx) { 1687 dev_err(&rpdev->dev, "No context ID matches response\n"); 1688 return -ENOENT; 1689 } 1690 1691 ctx->retval = rsp->retval; 1692 complete(&ctx->work); 1693 1694 /* 1695 * The DMA buffer associated with the context cannot be freed in 1696 * interrupt context so schedule it through a worker thread to 1697 * avoid a kernel BUG. 1698 */ 1699 schedule_work(&ctx->put_work); 1700 1701 return 0; 1702 } 1703 1704 static const struct of_device_id fastrpc_rpmsg_of_match[] = { 1705 { .compatible = "qcom,fastrpc" }, 1706 { }, 1707 }; 1708 MODULE_DEVICE_TABLE(of, fastrpc_rpmsg_of_match); 1709 1710 static struct rpmsg_driver fastrpc_driver = { 1711 .probe = fastrpc_rpmsg_probe, 1712 .remove = fastrpc_rpmsg_remove, 1713 .callback = fastrpc_rpmsg_callback, 1714 .drv = { 1715 .name = "qcom,fastrpc", 1716 .of_match_table = fastrpc_rpmsg_of_match, 1717 }, 1718 }; 1719 1720 static int fastrpc_init(void) 1721 { 1722 int ret; 1723 1724 ret = platform_driver_register(&fastrpc_cb_driver); 1725 if (ret < 0) { 1726 pr_err("fastrpc: failed to register cb driver\n"); 1727 return ret; 1728 } 1729 1730 ret = register_rpmsg_driver(&fastrpc_driver); 1731 if (ret < 0) { 1732 pr_err("fastrpc: failed to register rpmsg driver\n"); 1733 platform_driver_unregister(&fastrpc_cb_driver); 1734 return ret; 1735 } 1736 1737 return 0; 1738 } 1739 module_init(fastrpc_init); 1740 1741 static void fastrpc_exit(void) 1742 { 1743 platform_driver_unregister(&fastrpc_cb_driver); 1744 unregister_rpmsg_driver(&fastrpc_driver); 1745 } 1746 module_exit(fastrpc_exit); 1747 1748 MODULE_LICENSE("GPL v2"); 1749