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 int fastrpc_vmap(struct dma_buf *dmabuf, struct dma_buf_map *map) 585 { 586 struct fastrpc_buf *buf = dmabuf->priv; 587 588 dma_buf_map_set_vaddr(map, buf->virt); 589 590 return 0; 591 } 592 593 static int fastrpc_mmap(struct dma_buf *dmabuf, 594 struct vm_area_struct *vma) 595 { 596 struct fastrpc_buf *buf = dmabuf->priv; 597 size_t size = vma->vm_end - vma->vm_start; 598 599 return dma_mmap_coherent(buf->dev, vma, buf->virt, 600 FASTRPC_PHYS(buf->phys), size); 601 } 602 603 static const struct dma_buf_ops fastrpc_dma_buf_ops = { 604 .attach = fastrpc_dma_buf_attach, 605 .detach = fastrpc_dma_buf_detatch, 606 .map_dma_buf = fastrpc_map_dma_buf, 607 .unmap_dma_buf = fastrpc_unmap_dma_buf, 608 .mmap = fastrpc_mmap, 609 .vmap = fastrpc_vmap, 610 .release = fastrpc_release, 611 }; 612 613 static int fastrpc_map_create(struct fastrpc_user *fl, int fd, 614 u64 len, struct fastrpc_map **ppmap) 615 { 616 struct fastrpc_session_ctx *sess = fl->sctx; 617 struct fastrpc_map *map = NULL; 618 int err = 0; 619 620 if (!fastrpc_map_find(fl, fd, ppmap)) 621 return 0; 622 623 map = kzalloc(sizeof(*map), GFP_KERNEL); 624 if (!map) 625 return -ENOMEM; 626 627 INIT_LIST_HEAD(&map->node); 628 map->fl = fl; 629 map->fd = fd; 630 map->buf = dma_buf_get(fd); 631 if (IS_ERR(map->buf)) { 632 err = PTR_ERR(map->buf); 633 goto get_err; 634 } 635 636 map->attach = dma_buf_attach(map->buf, sess->dev); 637 if (IS_ERR(map->attach)) { 638 dev_err(sess->dev, "Failed to attach dmabuf\n"); 639 err = PTR_ERR(map->attach); 640 goto attach_err; 641 } 642 643 map->table = dma_buf_map_attachment(map->attach, DMA_BIDIRECTIONAL); 644 if (IS_ERR(map->table)) { 645 err = PTR_ERR(map->table); 646 goto map_err; 647 } 648 649 map->phys = sg_dma_address(map->table->sgl); 650 map->phys += ((u64)fl->sctx->sid << 32); 651 map->size = len; 652 map->va = sg_virt(map->table->sgl); 653 map->len = len; 654 kref_init(&map->refcount); 655 656 spin_lock(&fl->lock); 657 list_add_tail(&map->node, &fl->maps); 658 spin_unlock(&fl->lock); 659 *ppmap = map; 660 661 return 0; 662 663 map_err: 664 dma_buf_detach(map->buf, map->attach); 665 attach_err: 666 dma_buf_put(map->buf); 667 get_err: 668 kfree(map); 669 670 return err; 671 } 672 673 /* 674 * Fastrpc payload buffer with metadata looks like: 675 * 676 * >>>>>> START of METADATA <<<<<<<<< 677 * +---------------------------------+ 678 * | Arguments | 679 * | type:(struct fastrpc_remote_arg)| 680 * | (0 - N) | 681 * +---------------------------------+ 682 * | Invoke Buffer list | 683 * | type:(struct fastrpc_invoke_buf)| 684 * | (0 - N) | 685 * +---------------------------------+ 686 * | Page info list | 687 * | type:(struct fastrpc_phy_page) | 688 * | (0 - N) | 689 * +---------------------------------+ 690 * | Optional info | 691 * |(can be specific to SoC/Firmware)| 692 * +---------------------------------+ 693 * >>>>>>>> END of METADATA <<<<<<<<< 694 * +---------------------------------+ 695 * | Inline ARGS | 696 * | (0-N) | 697 * +---------------------------------+ 698 */ 699 700 static int fastrpc_get_meta_size(struct fastrpc_invoke_ctx *ctx) 701 { 702 int size = 0; 703 704 size = (sizeof(struct fastrpc_remote_arg) + 705 sizeof(struct fastrpc_invoke_buf) + 706 sizeof(struct fastrpc_phy_page)) * ctx->nscalars + 707 sizeof(u64) * FASTRPC_MAX_FDLIST + 708 sizeof(u32) * FASTRPC_MAX_CRCLIST; 709 710 return size; 711 } 712 713 static u64 fastrpc_get_payload_size(struct fastrpc_invoke_ctx *ctx, int metalen) 714 { 715 u64 size = 0; 716 int i; 717 718 size = ALIGN(metalen, FASTRPC_ALIGN); 719 for (i = 0; i < ctx->nscalars; i++) { 720 if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1) { 721 722 if (ctx->olaps[i].offset == 0) 723 size = ALIGN(size, FASTRPC_ALIGN); 724 725 size += (ctx->olaps[i].mend - ctx->olaps[i].mstart); 726 } 727 } 728 729 return size; 730 } 731 732 static int fastrpc_create_maps(struct fastrpc_invoke_ctx *ctx) 733 { 734 struct device *dev = ctx->fl->sctx->dev; 735 int i, err; 736 737 for (i = 0; i < ctx->nscalars; ++i) { 738 /* Make sure reserved field is set to 0 */ 739 if (ctx->args[i].reserved) 740 return -EINVAL; 741 742 if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1 || 743 ctx->args[i].length == 0) 744 continue; 745 746 err = fastrpc_map_create(ctx->fl, ctx->args[i].fd, 747 ctx->args[i].length, &ctx->maps[i]); 748 if (err) { 749 dev_err(dev, "Error Creating map %d\n", err); 750 return -EINVAL; 751 } 752 753 } 754 return 0; 755 } 756 757 static int fastrpc_get_args(u32 kernel, struct fastrpc_invoke_ctx *ctx) 758 { 759 struct device *dev = ctx->fl->sctx->dev; 760 struct fastrpc_remote_arg *rpra; 761 struct fastrpc_invoke_buf *list; 762 struct fastrpc_phy_page *pages; 763 int inbufs, i, oix, err = 0; 764 u64 len, rlen, pkt_size; 765 u64 pg_start, pg_end; 766 uintptr_t args; 767 int metalen; 768 769 inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); 770 metalen = fastrpc_get_meta_size(ctx); 771 pkt_size = fastrpc_get_payload_size(ctx, metalen); 772 773 err = fastrpc_create_maps(ctx); 774 if (err) 775 return err; 776 777 ctx->msg_sz = pkt_size; 778 779 err = fastrpc_buf_alloc(ctx->fl, dev, pkt_size, &ctx->buf); 780 if (err) 781 return err; 782 783 rpra = ctx->buf->virt; 784 list = ctx->buf->virt + ctx->nscalars * sizeof(*rpra); 785 pages = ctx->buf->virt + ctx->nscalars * (sizeof(*list) + 786 sizeof(*rpra)); 787 args = (uintptr_t)ctx->buf->virt + metalen; 788 rlen = pkt_size - metalen; 789 ctx->rpra = rpra; 790 791 for (oix = 0; oix < ctx->nbufs; ++oix) { 792 int mlen; 793 794 i = ctx->olaps[oix].raix; 795 len = ctx->args[i].length; 796 797 rpra[i].pv = 0; 798 rpra[i].len = len; 799 list[i].num = len ? 1 : 0; 800 list[i].pgidx = i; 801 802 if (!len) 803 continue; 804 805 if (ctx->maps[i]) { 806 struct vm_area_struct *vma = NULL; 807 808 rpra[i].pv = (u64) ctx->args[i].ptr; 809 pages[i].addr = ctx->maps[i]->phys; 810 811 vma = find_vma(current->mm, ctx->args[i].ptr); 812 if (vma) 813 pages[i].addr += ctx->args[i].ptr - 814 vma->vm_start; 815 816 pg_start = (ctx->args[i].ptr & PAGE_MASK) >> PAGE_SHIFT; 817 pg_end = ((ctx->args[i].ptr + len - 1) & PAGE_MASK) >> 818 PAGE_SHIFT; 819 pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; 820 821 } else { 822 823 if (ctx->olaps[oix].offset == 0) { 824 rlen -= ALIGN(args, FASTRPC_ALIGN) - args; 825 args = ALIGN(args, FASTRPC_ALIGN); 826 } 827 828 mlen = ctx->olaps[oix].mend - ctx->olaps[oix].mstart; 829 830 if (rlen < mlen) 831 goto bail; 832 833 rpra[i].pv = args - ctx->olaps[oix].offset; 834 pages[i].addr = ctx->buf->phys - 835 ctx->olaps[oix].offset + 836 (pkt_size - rlen); 837 pages[i].addr = pages[i].addr & PAGE_MASK; 838 839 pg_start = (args & PAGE_MASK) >> PAGE_SHIFT; 840 pg_end = ((args + len - 1) & PAGE_MASK) >> PAGE_SHIFT; 841 pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; 842 args = args + mlen; 843 rlen -= mlen; 844 } 845 846 if (i < inbufs && !ctx->maps[i]) { 847 void *dst = (void *)(uintptr_t)rpra[i].pv; 848 void *src = (void *)(uintptr_t)ctx->args[i].ptr; 849 850 if (!kernel) { 851 if (copy_from_user(dst, (void __user *)src, 852 len)) { 853 err = -EFAULT; 854 goto bail; 855 } 856 } else { 857 memcpy(dst, src, len); 858 } 859 } 860 } 861 862 for (i = ctx->nbufs; i < ctx->nscalars; ++i) { 863 rpra[i].pv = (u64) ctx->args[i].ptr; 864 rpra[i].len = ctx->args[i].length; 865 list[i].num = ctx->args[i].length ? 1 : 0; 866 list[i].pgidx = i; 867 pages[i].addr = ctx->maps[i]->phys; 868 pages[i].size = ctx->maps[i]->size; 869 } 870 871 bail: 872 if (err) 873 dev_err(dev, "Error: get invoke args failed:%d\n", err); 874 875 return err; 876 } 877 878 static int fastrpc_put_args(struct fastrpc_invoke_ctx *ctx, 879 u32 kernel) 880 { 881 struct fastrpc_remote_arg *rpra = ctx->rpra; 882 int i, inbufs; 883 884 inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); 885 886 for (i = inbufs; i < ctx->nbufs; ++i) { 887 void *src = (void *)(uintptr_t)rpra[i].pv; 888 void *dst = (void *)(uintptr_t)ctx->args[i].ptr; 889 u64 len = rpra[i].len; 890 891 if (!kernel) { 892 if (copy_to_user((void __user *)dst, src, len)) 893 return -EFAULT; 894 } else { 895 memcpy(dst, src, len); 896 } 897 } 898 899 return 0; 900 } 901 902 static int fastrpc_invoke_send(struct fastrpc_session_ctx *sctx, 903 struct fastrpc_invoke_ctx *ctx, 904 u32 kernel, uint32_t handle) 905 { 906 struct fastrpc_channel_ctx *cctx; 907 struct fastrpc_user *fl = ctx->fl; 908 struct fastrpc_msg *msg = &ctx->msg; 909 int ret; 910 911 cctx = fl->cctx; 912 msg->pid = fl->tgid; 913 msg->tid = current->pid; 914 915 if (kernel) 916 msg->pid = 0; 917 918 msg->ctx = ctx->ctxid | fl->pd; 919 msg->handle = handle; 920 msg->sc = ctx->sc; 921 msg->addr = ctx->buf ? ctx->buf->phys : 0; 922 msg->size = roundup(ctx->msg_sz, PAGE_SIZE); 923 fastrpc_context_get(ctx); 924 925 ret = rpmsg_send(cctx->rpdev->ept, (void *)msg, sizeof(*msg)); 926 927 if (ret) 928 fastrpc_context_put(ctx); 929 930 return ret; 931 932 } 933 934 static int fastrpc_internal_invoke(struct fastrpc_user *fl, u32 kernel, 935 u32 handle, u32 sc, 936 struct fastrpc_invoke_args *args) 937 { 938 struct fastrpc_invoke_ctx *ctx = NULL; 939 int err = 0; 940 941 if (!fl->sctx) 942 return -EINVAL; 943 944 if (!fl->cctx->rpdev) 945 return -EPIPE; 946 947 ctx = fastrpc_context_alloc(fl, kernel, sc, args); 948 if (IS_ERR(ctx)) 949 return PTR_ERR(ctx); 950 951 if (ctx->nscalars) { 952 err = fastrpc_get_args(kernel, ctx); 953 if (err) 954 goto bail; 955 } 956 957 /* make sure that all CPU memory writes are seen by DSP */ 958 dma_wmb(); 959 /* Send invoke buffer to remote dsp */ 960 err = fastrpc_invoke_send(fl->sctx, ctx, kernel, handle); 961 if (err) 962 goto bail; 963 964 if (kernel) { 965 if (!wait_for_completion_timeout(&ctx->work, 10 * HZ)) 966 err = -ETIMEDOUT; 967 } else { 968 err = wait_for_completion_interruptible(&ctx->work); 969 } 970 971 if (err) 972 goto bail; 973 974 /* Check the response from remote dsp */ 975 err = ctx->retval; 976 if (err) 977 goto bail; 978 979 if (ctx->nscalars) { 980 /* make sure that all memory writes by DSP are seen by CPU */ 981 dma_rmb(); 982 /* populate all the output buffers with results */ 983 err = fastrpc_put_args(ctx, kernel); 984 if (err) 985 goto bail; 986 } 987 988 bail: 989 if (err != -ERESTARTSYS && err != -ETIMEDOUT) { 990 /* We are done with this compute context */ 991 spin_lock(&fl->lock); 992 list_del(&ctx->node); 993 spin_unlock(&fl->lock); 994 fastrpc_context_put(ctx); 995 } 996 if (err) 997 dev_dbg(fl->sctx->dev, "Error: Invoke Failed %d\n", err); 998 999 return err; 1000 } 1001 1002 static int fastrpc_init_create_process(struct fastrpc_user *fl, 1003 char __user *argp) 1004 { 1005 struct fastrpc_init_create init; 1006 struct fastrpc_invoke_args *args; 1007 struct fastrpc_phy_page pages[1]; 1008 struct fastrpc_map *map = NULL; 1009 struct fastrpc_buf *imem = NULL; 1010 int memlen; 1011 int err; 1012 struct { 1013 int pgid; 1014 u32 namelen; 1015 u32 filelen; 1016 u32 pageslen; 1017 u32 attrs; 1018 u32 siglen; 1019 } inbuf; 1020 u32 sc; 1021 1022 args = kcalloc(FASTRPC_CREATE_PROCESS_NARGS, sizeof(*args), GFP_KERNEL); 1023 if (!args) 1024 return -ENOMEM; 1025 1026 if (copy_from_user(&init, argp, sizeof(init))) { 1027 err = -EFAULT; 1028 goto err; 1029 } 1030 1031 if (init.filelen > INIT_FILELEN_MAX) { 1032 err = -EINVAL; 1033 goto err; 1034 } 1035 1036 inbuf.pgid = fl->tgid; 1037 inbuf.namelen = strlen(current->comm) + 1; 1038 inbuf.filelen = init.filelen; 1039 inbuf.pageslen = 1; 1040 inbuf.attrs = init.attrs; 1041 inbuf.siglen = init.siglen; 1042 fl->pd = 1; 1043 1044 if (init.filelen && init.filefd) { 1045 err = fastrpc_map_create(fl, init.filefd, init.filelen, &map); 1046 if (err) 1047 goto err; 1048 } 1049 1050 memlen = ALIGN(max(INIT_FILELEN_MAX, (int)init.filelen * 4), 1051 1024 * 1024); 1052 err = fastrpc_buf_alloc(fl, fl->sctx->dev, memlen, 1053 &imem); 1054 if (err) 1055 goto err_alloc; 1056 1057 fl->init_mem = imem; 1058 args[0].ptr = (u64)(uintptr_t)&inbuf; 1059 args[0].length = sizeof(inbuf); 1060 args[0].fd = -1; 1061 1062 args[1].ptr = (u64)(uintptr_t)current->comm; 1063 args[1].length = inbuf.namelen; 1064 args[1].fd = -1; 1065 1066 args[2].ptr = (u64) init.file; 1067 args[2].length = inbuf.filelen; 1068 args[2].fd = init.filefd; 1069 1070 pages[0].addr = imem->phys; 1071 pages[0].size = imem->size; 1072 1073 args[3].ptr = (u64)(uintptr_t) pages; 1074 args[3].length = 1 * sizeof(*pages); 1075 args[3].fd = -1; 1076 1077 args[4].ptr = (u64)(uintptr_t)&inbuf.attrs; 1078 args[4].length = sizeof(inbuf.attrs); 1079 args[4].fd = -1; 1080 1081 args[5].ptr = (u64)(uintptr_t) &inbuf.siglen; 1082 args[5].length = sizeof(inbuf.siglen); 1083 args[5].fd = -1; 1084 1085 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE, 4, 0); 1086 if (init.attrs) 1087 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE_ATTR, 6, 0); 1088 1089 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1090 sc, args); 1091 if (err) 1092 goto err_invoke; 1093 1094 kfree(args); 1095 1096 return 0; 1097 1098 err_invoke: 1099 fl->init_mem = NULL; 1100 fastrpc_buf_free(imem); 1101 err_alloc: 1102 if (map) { 1103 spin_lock(&fl->lock); 1104 list_del(&map->node); 1105 spin_unlock(&fl->lock); 1106 fastrpc_map_put(map); 1107 } 1108 err: 1109 kfree(args); 1110 1111 return err; 1112 } 1113 1114 static struct fastrpc_session_ctx *fastrpc_session_alloc( 1115 struct fastrpc_channel_ctx *cctx) 1116 { 1117 struct fastrpc_session_ctx *session = NULL; 1118 unsigned long flags; 1119 int i; 1120 1121 spin_lock_irqsave(&cctx->lock, flags); 1122 for (i = 0; i < cctx->sesscount; i++) { 1123 if (!cctx->session[i].used && cctx->session[i].valid) { 1124 cctx->session[i].used = true; 1125 session = &cctx->session[i]; 1126 break; 1127 } 1128 } 1129 spin_unlock_irqrestore(&cctx->lock, flags); 1130 1131 return session; 1132 } 1133 1134 static void fastrpc_session_free(struct fastrpc_channel_ctx *cctx, 1135 struct fastrpc_session_ctx *session) 1136 { 1137 unsigned long flags; 1138 1139 spin_lock_irqsave(&cctx->lock, flags); 1140 session->used = false; 1141 spin_unlock_irqrestore(&cctx->lock, flags); 1142 } 1143 1144 static int fastrpc_release_current_dsp_process(struct fastrpc_user *fl) 1145 { 1146 struct fastrpc_invoke_args args[1]; 1147 int tgid = 0; 1148 u32 sc; 1149 1150 tgid = fl->tgid; 1151 args[0].ptr = (u64)(uintptr_t) &tgid; 1152 args[0].length = sizeof(tgid); 1153 args[0].fd = -1; 1154 args[0].reserved = 0; 1155 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_RELEASE, 1, 0); 1156 1157 return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1158 sc, &args[0]); 1159 } 1160 1161 static int fastrpc_device_release(struct inode *inode, struct file *file) 1162 { 1163 struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; 1164 struct fastrpc_channel_ctx *cctx = fl->cctx; 1165 struct fastrpc_invoke_ctx *ctx, *n; 1166 struct fastrpc_map *map, *m; 1167 struct fastrpc_buf *buf, *b; 1168 unsigned long flags; 1169 1170 fastrpc_release_current_dsp_process(fl); 1171 1172 spin_lock_irqsave(&cctx->lock, flags); 1173 list_del(&fl->user); 1174 spin_unlock_irqrestore(&cctx->lock, flags); 1175 1176 if (fl->init_mem) 1177 fastrpc_buf_free(fl->init_mem); 1178 1179 list_for_each_entry_safe(ctx, n, &fl->pending, node) { 1180 list_del(&ctx->node); 1181 fastrpc_context_put(ctx); 1182 } 1183 1184 list_for_each_entry_safe(map, m, &fl->maps, node) { 1185 list_del(&map->node); 1186 fastrpc_map_put(map); 1187 } 1188 1189 list_for_each_entry_safe(buf, b, &fl->mmaps, node) { 1190 list_del(&buf->node); 1191 fastrpc_buf_free(buf); 1192 } 1193 1194 fastrpc_session_free(cctx, fl->sctx); 1195 fastrpc_channel_ctx_put(cctx); 1196 1197 mutex_destroy(&fl->mutex); 1198 kfree(fl); 1199 file->private_data = NULL; 1200 1201 return 0; 1202 } 1203 1204 static int fastrpc_device_open(struct inode *inode, struct file *filp) 1205 { 1206 struct fastrpc_channel_ctx *cctx = miscdev_to_cctx(filp->private_data); 1207 struct fastrpc_user *fl = NULL; 1208 unsigned long flags; 1209 1210 fl = kzalloc(sizeof(*fl), GFP_KERNEL); 1211 if (!fl) 1212 return -ENOMEM; 1213 1214 /* Released in fastrpc_device_release() */ 1215 fastrpc_channel_ctx_get(cctx); 1216 1217 filp->private_data = fl; 1218 spin_lock_init(&fl->lock); 1219 mutex_init(&fl->mutex); 1220 INIT_LIST_HEAD(&fl->pending); 1221 INIT_LIST_HEAD(&fl->maps); 1222 INIT_LIST_HEAD(&fl->mmaps); 1223 INIT_LIST_HEAD(&fl->user); 1224 fl->tgid = current->tgid; 1225 fl->cctx = cctx; 1226 1227 fl->sctx = fastrpc_session_alloc(cctx); 1228 if (!fl->sctx) { 1229 dev_err(&cctx->rpdev->dev, "No session available\n"); 1230 mutex_destroy(&fl->mutex); 1231 kfree(fl); 1232 1233 return -EBUSY; 1234 } 1235 1236 spin_lock_irqsave(&cctx->lock, flags); 1237 list_add_tail(&fl->user, &cctx->users); 1238 spin_unlock_irqrestore(&cctx->lock, flags); 1239 1240 return 0; 1241 } 1242 1243 static int fastrpc_dmabuf_alloc(struct fastrpc_user *fl, char __user *argp) 1244 { 1245 struct fastrpc_alloc_dma_buf bp; 1246 DEFINE_DMA_BUF_EXPORT_INFO(exp_info); 1247 struct fastrpc_buf *buf = NULL; 1248 int err; 1249 1250 if (copy_from_user(&bp, argp, sizeof(bp))) 1251 return -EFAULT; 1252 1253 err = fastrpc_buf_alloc(fl, fl->sctx->dev, bp.size, &buf); 1254 if (err) 1255 return err; 1256 exp_info.ops = &fastrpc_dma_buf_ops; 1257 exp_info.size = bp.size; 1258 exp_info.flags = O_RDWR; 1259 exp_info.priv = buf; 1260 buf->dmabuf = dma_buf_export(&exp_info); 1261 if (IS_ERR(buf->dmabuf)) { 1262 err = PTR_ERR(buf->dmabuf); 1263 fastrpc_buf_free(buf); 1264 return err; 1265 } 1266 1267 bp.fd = dma_buf_fd(buf->dmabuf, O_ACCMODE); 1268 if (bp.fd < 0) { 1269 dma_buf_put(buf->dmabuf); 1270 return -EINVAL; 1271 } 1272 1273 if (copy_to_user(argp, &bp, sizeof(bp))) { 1274 dma_buf_put(buf->dmabuf); 1275 return -EFAULT; 1276 } 1277 1278 return 0; 1279 } 1280 1281 static int fastrpc_init_attach(struct fastrpc_user *fl) 1282 { 1283 struct fastrpc_invoke_args args[1]; 1284 int tgid = fl->tgid; 1285 u32 sc; 1286 1287 args[0].ptr = (u64)(uintptr_t) &tgid; 1288 args[0].length = sizeof(tgid); 1289 args[0].fd = -1; 1290 args[0].reserved = 0; 1291 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_ATTACH, 1, 0); 1292 fl->pd = 0; 1293 1294 return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1295 sc, &args[0]); 1296 } 1297 1298 static int fastrpc_invoke(struct fastrpc_user *fl, char __user *argp) 1299 { 1300 struct fastrpc_invoke_args *args = NULL; 1301 struct fastrpc_invoke inv; 1302 u32 nscalars; 1303 int err; 1304 1305 if (copy_from_user(&inv, argp, sizeof(inv))) 1306 return -EFAULT; 1307 1308 /* nscalars is truncated here to max supported value */ 1309 nscalars = REMOTE_SCALARS_LENGTH(inv.sc); 1310 if (nscalars) { 1311 args = kcalloc(nscalars, sizeof(*args), GFP_KERNEL); 1312 if (!args) 1313 return -ENOMEM; 1314 1315 if (copy_from_user(args, (void __user *)(uintptr_t)inv.args, 1316 nscalars * sizeof(*args))) { 1317 kfree(args); 1318 return -EFAULT; 1319 } 1320 } 1321 1322 err = fastrpc_internal_invoke(fl, false, inv.handle, inv.sc, args); 1323 kfree(args); 1324 1325 return err; 1326 } 1327 1328 static int fastrpc_req_munmap_impl(struct fastrpc_user *fl, 1329 struct fastrpc_req_munmap *req) 1330 { 1331 struct fastrpc_invoke_args args[1] = { [0] = { 0 } }; 1332 struct fastrpc_buf *buf, *b; 1333 struct fastrpc_munmap_req_msg req_msg; 1334 struct device *dev = fl->sctx->dev; 1335 int err; 1336 u32 sc; 1337 1338 spin_lock(&fl->lock); 1339 list_for_each_entry_safe(buf, b, &fl->mmaps, node) { 1340 if ((buf->raddr == req->vaddrout) && (buf->size == req->size)) 1341 break; 1342 buf = NULL; 1343 } 1344 spin_unlock(&fl->lock); 1345 1346 if (!buf) { 1347 dev_err(dev, "mmap not in list\n"); 1348 return -EINVAL; 1349 } 1350 1351 req_msg.pgid = fl->tgid; 1352 req_msg.size = buf->size; 1353 req_msg.vaddr = buf->raddr; 1354 1355 args[0].ptr = (u64) (uintptr_t) &req_msg; 1356 args[0].length = sizeof(req_msg); 1357 1358 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MUNMAP, 1, 0); 1359 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, 1360 &args[0]); 1361 if (!err) { 1362 dev_dbg(dev, "unmmap\tpt 0x%09lx OK\n", buf->raddr); 1363 spin_lock(&fl->lock); 1364 list_del(&buf->node); 1365 spin_unlock(&fl->lock); 1366 fastrpc_buf_free(buf); 1367 } else { 1368 dev_err(dev, "unmmap\tpt 0x%09lx ERROR\n", buf->raddr); 1369 } 1370 1371 return err; 1372 } 1373 1374 static int fastrpc_req_munmap(struct fastrpc_user *fl, char __user *argp) 1375 { 1376 struct fastrpc_req_munmap req; 1377 1378 if (copy_from_user(&req, argp, sizeof(req))) 1379 return -EFAULT; 1380 1381 return fastrpc_req_munmap_impl(fl, &req); 1382 } 1383 1384 static int fastrpc_req_mmap(struct fastrpc_user *fl, char __user *argp) 1385 { 1386 struct fastrpc_invoke_args args[3] = { [0 ... 2] = { 0 } }; 1387 struct fastrpc_buf *buf = NULL; 1388 struct fastrpc_mmap_req_msg req_msg; 1389 struct fastrpc_mmap_rsp_msg rsp_msg; 1390 struct fastrpc_req_munmap req_unmap; 1391 struct fastrpc_phy_page pages; 1392 struct fastrpc_req_mmap req; 1393 struct device *dev = fl->sctx->dev; 1394 int err; 1395 u32 sc; 1396 1397 if (copy_from_user(&req, argp, sizeof(req))) 1398 return -EFAULT; 1399 1400 if (req.flags != ADSP_MMAP_ADD_PAGES) { 1401 dev_err(dev, "flag not supported 0x%x\n", req.flags); 1402 return -EINVAL; 1403 } 1404 1405 if (req.vaddrin) { 1406 dev_err(dev, "adding user allocated pages is not supported\n"); 1407 return -EINVAL; 1408 } 1409 1410 err = fastrpc_buf_alloc(fl, fl->sctx->dev, req.size, &buf); 1411 if (err) { 1412 dev_err(dev, "failed to allocate buffer\n"); 1413 return err; 1414 } 1415 1416 req_msg.pgid = fl->tgid; 1417 req_msg.flags = req.flags; 1418 req_msg.vaddr = req.vaddrin; 1419 req_msg.num = sizeof(pages); 1420 1421 args[0].ptr = (u64) (uintptr_t) &req_msg; 1422 args[0].length = sizeof(req_msg); 1423 1424 pages.addr = buf->phys; 1425 pages.size = buf->size; 1426 1427 args[1].ptr = (u64) (uintptr_t) &pages; 1428 args[1].length = sizeof(pages); 1429 1430 args[2].ptr = (u64) (uintptr_t) &rsp_msg; 1431 args[2].length = sizeof(rsp_msg); 1432 1433 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MMAP, 2, 1); 1434 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, 1435 &args[0]); 1436 if (err) { 1437 dev_err(dev, "mmap error (len 0x%08llx)\n", buf->size); 1438 goto err_invoke; 1439 } 1440 1441 /* update the buffer to be able to deallocate the memory on the DSP */ 1442 buf->raddr = (uintptr_t) rsp_msg.vaddr; 1443 1444 /* let the client know the address to use */ 1445 req.vaddrout = rsp_msg.vaddr; 1446 1447 spin_lock(&fl->lock); 1448 list_add_tail(&buf->node, &fl->mmaps); 1449 spin_unlock(&fl->lock); 1450 1451 if (copy_to_user((void __user *)argp, &req, sizeof(req))) { 1452 /* unmap the memory and release the buffer */ 1453 req_unmap.vaddrout = buf->raddr; 1454 req_unmap.size = buf->size; 1455 fastrpc_req_munmap_impl(fl, &req_unmap); 1456 return -EFAULT; 1457 } 1458 1459 dev_dbg(dev, "mmap\t\tpt 0x%09lx OK [len 0x%08llx]\n", 1460 buf->raddr, buf->size); 1461 1462 return 0; 1463 1464 err_invoke: 1465 fastrpc_buf_free(buf); 1466 1467 return err; 1468 } 1469 1470 static long fastrpc_device_ioctl(struct file *file, unsigned int cmd, 1471 unsigned long arg) 1472 { 1473 struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; 1474 char __user *argp = (char __user *)arg; 1475 int err; 1476 1477 switch (cmd) { 1478 case FASTRPC_IOCTL_INVOKE: 1479 err = fastrpc_invoke(fl, argp); 1480 break; 1481 case FASTRPC_IOCTL_INIT_ATTACH: 1482 err = fastrpc_init_attach(fl); 1483 break; 1484 case FASTRPC_IOCTL_INIT_CREATE: 1485 err = fastrpc_init_create_process(fl, argp); 1486 break; 1487 case FASTRPC_IOCTL_ALLOC_DMA_BUFF: 1488 err = fastrpc_dmabuf_alloc(fl, argp); 1489 break; 1490 case FASTRPC_IOCTL_MMAP: 1491 err = fastrpc_req_mmap(fl, argp); 1492 break; 1493 case FASTRPC_IOCTL_MUNMAP: 1494 err = fastrpc_req_munmap(fl, argp); 1495 break; 1496 default: 1497 err = -ENOTTY; 1498 break; 1499 } 1500 1501 return err; 1502 } 1503 1504 static const struct file_operations fastrpc_fops = { 1505 .open = fastrpc_device_open, 1506 .release = fastrpc_device_release, 1507 .unlocked_ioctl = fastrpc_device_ioctl, 1508 .compat_ioctl = fastrpc_device_ioctl, 1509 }; 1510 1511 static int fastrpc_cb_probe(struct platform_device *pdev) 1512 { 1513 struct fastrpc_channel_ctx *cctx; 1514 struct fastrpc_session_ctx *sess; 1515 struct device *dev = &pdev->dev; 1516 int i, sessions = 0; 1517 unsigned long flags; 1518 int rc; 1519 1520 cctx = dev_get_drvdata(dev->parent); 1521 if (!cctx) 1522 return -EINVAL; 1523 1524 of_property_read_u32(dev->of_node, "qcom,nsessions", &sessions); 1525 1526 spin_lock_irqsave(&cctx->lock, flags); 1527 sess = &cctx->session[cctx->sesscount]; 1528 sess->used = false; 1529 sess->valid = true; 1530 sess->dev = dev; 1531 dev_set_drvdata(dev, sess); 1532 1533 if (of_property_read_u32(dev->of_node, "reg", &sess->sid)) 1534 dev_info(dev, "FastRPC Session ID not specified in DT\n"); 1535 1536 if (sessions > 0) { 1537 struct fastrpc_session_ctx *dup_sess; 1538 1539 for (i = 1; i < sessions; i++) { 1540 if (cctx->sesscount++ >= FASTRPC_MAX_SESSIONS) 1541 break; 1542 dup_sess = &cctx->session[cctx->sesscount]; 1543 memcpy(dup_sess, sess, sizeof(*dup_sess)); 1544 } 1545 } 1546 cctx->sesscount++; 1547 spin_unlock_irqrestore(&cctx->lock, flags); 1548 rc = dma_set_mask(dev, DMA_BIT_MASK(32)); 1549 if (rc) { 1550 dev_err(dev, "32-bit DMA enable failed\n"); 1551 return rc; 1552 } 1553 1554 return 0; 1555 } 1556 1557 static int fastrpc_cb_remove(struct platform_device *pdev) 1558 { 1559 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(pdev->dev.parent); 1560 struct fastrpc_session_ctx *sess = dev_get_drvdata(&pdev->dev); 1561 unsigned long flags; 1562 int i; 1563 1564 spin_lock_irqsave(&cctx->lock, flags); 1565 for (i = 1; i < FASTRPC_MAX_SESSIONS; i++) { 1566 if (cctx->session[i].sid == sess->sid) { 1567 cctx->session[i].valid = false; 1568 cctx->sesscount--; 1569 } 1570 } 1571 spin_unlock_irqrestore(&cctx->lock, flags); 1572 1573 return 0; 1574 } 1575 1576 static const struct of_device_id fastrpc_match_table[] = { 1577 { .compatible = "qcom,fastrpc-compute-cb", }, 1578 {} 1579 }; 1580 1581 static struct platform_driver fastrpc_cb_driver = { 1582 .probe = fastrpc_cb_probe, 1583 .remove = fastrpc_cb_remove, 1584 .driver = { 1585 .name = "qcom,fastrpc-cb", 1586 .of_match_table = fastrpc_match_table, 1587 .suppress_bind_attrs = true, 1588 }, 1589 }; 1590 1591 static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev) 1592 { 1593 struct device *rdev = &rpdev->dev; 1594 struct fastrpc_channel_ctx *data; 1595 int i, err, domain_id = -1; 1596 const char *domain; 1597 1598 err = of_property_read_string(rdev->of_node, "label", &domain); 1599 if (err) { 1600 dev_info(rdev, "FastRPC Domain not specified in DT\n"); 1601 return err; 1602 } 1603 1604 for (i = 0; i <= CDSP_DOMAIN_ID; i++) { 1605 if (!strcmp(domains[i], domain)) { 1606 domain_id = i; 1607 break; 1608 } 1609 } 1610 1611 if (domain_id < 0) { 1612 dev_info(rdev, "FastRPC Invalid Domain ID %d\n", domain_id); 1613 return -EINVAL; 1614 } 1615 1616 data = kzalloc(sizeof(*data), GFP_KERNEL); 1617 if (!data) 1618 return -ENOMEM; 1619 1620 data->miscdev.minor = MISC_DYNAMIC_MINOR; 1621 data->miscdev.name = devm_kasprintf(rdev, GFP_KERNEL, "fastrpc-%s", 1622 domains[domain_id]); 1623 data->miscdev.fops = &fastrpc_fops; 1624 err = misc_register(&data->miscdev); 1625 if (err) { 1626 kfree(data); 1627 return err; 1628 } 1629 1630 kref_init(&data->refcount); 1631 1632 dev_set_drvdata(&rpdev->dev, data); 1633 dma_set_mask_and_coherent(rdev, DMA_BIT_MASK(32)); 1634 INIT_LIST_HEAD(&data->users); 1635 spin_lock_init(&data->lock); 1636 idr_init(&data->ctx_idr); 1637 data->domain_id = domain_id; 1638 data->rpdev = rpdev; 1639 1640 return of_platform_populate(rdev->of_node, NULL, NULL, rdev); 1641 } 1642 1643 static void fastrpc_notify_users(struct fastrpc_user *user) 1644 { 1645 struct fastrpc_invoke_ctx *ctx; 1646 1647 spin_lock(&user->lock); 1648 list_for_each_entry(ctx, &user->pending, node) 1649 complete(&ctx->work); 1650 spin_unlock(&user->lock); 1651 } 1652 1653 static void fastrpc_rpmsg_remove(struct rpmsg_device *rpdev) 1654 { 1655 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); 1656 struct fastrpc_user *user; 1657 unsigned long flags; 1658 1659 spin_lock_irqsave(&cctx->lock, flags); 1660 list_for_each_entry(user, &cctx->users, user) 1661 fastrpc_notify_users(user); 1662 spin_unlock_irqrestore(&cctx->lock, flags); 1663 1664 misc_deregister(&cctx->miscdev); 1665 of_platform_depopulate(&rpdev->dev); 1666 1667 cctx->rpdev = NULL; 1668 fastrpc_channel_ctx_put(cctx); 1669 } 1670 1671 static int fastrpc_rpmsg_callback(struct rpmsg_device *rpdev, void *data, 1672 int len, void *priv, u32 addr) 1673 { 1674 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); 1675 struct fastrpc_invoke_rsp *rsp = data; 1676 struct fastrpc_invoke_ctx *ctx; 1677 unsigned long flags; 1678 unsigned long ctxid; 1679 1680 if (len < sizeof(*rsp)) 1681 return -EINVAL; 1682 1683 ctxid = ((rsp->ctx & FASTRPC_CTXID_MASK) >> 4); 1684 1685 spin_lock_irqsave(&cctx->lock, flags); 1686 ctx = idr_find(&cctx->ctx_idr, ctxid); 1687 spin_unlock_irqrestore(&cctx->lock, flags); 1688 1689 if (!ctx) { 1690 dev_err(&rpdev->dev, "No context ID matches response\n"); 1691 return -ENOENT; 1692 } 1693 1694 ctx->retval = rsp->retval; 1695 complete(&ctx->work); 1696 1697 /* 1698 * The DMA buffer associated with the context cannot be freed in 1699 * interrupt context so schedule it through a worker thread to 1700 * avoid a kernel BUG. 1701 */ 1702 schedule_work(&ctx->put_work); 1703 1704 return 0; 1705 } 1706 1707 static const struct of_device_id fastrpc_rpmsg_of_match[] = { 1708 { .compatible = "qcom,fastrpc" }, 1709 { }, 1710 }; 1711 MODULE_DEVICE_TABLE(of, fastrpc_rpmsg_of_match); 1712 1713 static struct rpmsg_driver fastrpc_driver = { 1714 .probe = fastrpc_rpmsg_probe, 1715 .remove = fastrpc_rpmsg_remove, 1716 .callback = fastrpc_rpmsg_callback, 1717 .drv = { 1718 .name = "qcom,fastrpc", 1719 .of_match_table = fastrpc_rpmsg_of_match, 1720 }, 1721 }; 1722 1723 static int fastrpc_init(void) 1724 { 1725 int ret; 1726 1727 ret = platform_driver_register(&fastrpc_cb_driver); 1728 if (ret < 0) { 1729 pr_err("fastrpc: failed to register cb driver\n"); 1730 return ret; 1731 } 1732 1733 ret = register_rpmsg_driver(&fastrpc_driver); 1734 if (ret < 0) { 1735 pr_err("fastrpc: failed to register rpmsg driver\n"); 1736 platform_driver_unregister(&fastrpc_cb_driver); 1737 return ret; 1738 } 1739 1740 return 0; 1741 } 1742 module_init(fastrpc_init); 1743 1744 static void fastrpc_exit(void) 1745 { 1746 platform_driver_unregister(&fastrpc_cb_driver); 1747 unregister_rpmsg_driver(&fastrpc_driver); 1748 } 1749 module_exit(fastrpc_exit); 1750 1751 MODULE_LICENSE("GPL v2"); 1752