1// SPDX-License-Identifier: GPL-2.0 2// Copyright (c) 2011-2018, The Linux Foundation. All rights reserved. 3// Copyright (c) 2018, Linaro Limited 4 5#include <linux/completion.h> 6#include <linux/device.h> 7#include <linux/dma-buf.h> 8#include <linux/dma-mapping.h> 9#include <linux/idr.h> 10#include <linux/list.h> 11#include <linux/miscdevice.h> 12#include <linux/module.h> 13#include <linux/of_address.h> 14#include <linux/of.h> 15#include <linux/sort.h> 16#include <linux/of_platform.h> 17#include <linux/rpmsg.h> 18#include <linux/scatterlist.h> 19#include <linux/slab.h> 20#include <uapi/misc/fastrpc.h> 21 22#define ADSP_DOMAIN_ID (0) 23#define MDSP_DOMAIN_ID (1) 24#define SDSP_DOMAIN_ID (2) 25#define CDSP_DOMAIN_ID (3) 26#define FASTRPC_DEV_MAX 4 /* adsp, mdsp, slpi, cdsp*/ 27#define FASTRPC_MAX_SESSIONS 9 /*8 compute, 1 cpz*/ 28#define FASTRPC_ALIGN 128 29#define FASTRPC_MAX_FDLIST 16 30#define FASTRPC_MAX_CRCLIST 64 31#define FASTRPC_PHYS(p) ((p) & 0xffffffff) 32#define FASTRPC_CTX_MAX (256) 33#define FASTRPC_INIT_HANDLE 1 34#define FASTRPC_CTXID_MASK (0xFF0) 35#define INIT_FILELEN_MAX (2 * 1024 * 1024) 36#define FASTRPC_DEVICE_NAME "fastrpc" 37#define ADSP_MMAP_ADD_PAGES 0x1000 38 39/* Retrives number of input buffers from the scalars parameter */ 40#define REMOTE_SCALARS_INBUFS(sc) (((sc) >> 16) & 0x0ff) 41 42/* Retrives number of output buffers from the scalars parameter */ 43#define REMOTE_SCALARS_OUTBUFS(sc) (((sc) >> 8) & 0x0ff) 44 45/* Retrives number of input handles from the scalars parameter */ 46#define REMOTE_SCALARS_INHANDLES(sc) (((sc) >> 4) & 0x0f) 47 48/* Retrives number of output handles from the scalars parameter */ 49#define REMOTE_SCALARS_OUTHANDLES(sc) ((sc) & 0x0f) 50 51#define REMOTE_SCALARS_LENGTH(sc) (REMOTE_SCALARS_INBUFS(sc) + \ 52 REMOTE_SCALARS_OUTBUFS(sc) + \ 53 REMOTE_SCALARS_INHANDLES(sc)+ \ 54 REMOTE_SCALARS_OUTHANDLES(sc)) 55#define FASTRPC_BUILD_SCALARS(attr, method, in, out, oin, oout) \ 56 (((attr & 0x07) << 29) | \ 57 ((method & 0x1f) << 24) | \ 58 ((in & 0xff) << 16) | \ 59 ((out & 0xff) << 8) | \ 60 ((oin & 0x0f) << 4) | \ 61 (oout & 0x0f)) 62 63#define FASTRPC_SCALARS(method, in, out) \ 64 FASTRPC_BUILD_SCALARS(0, method, in, out, 0, 0) 65 66#define FASTRPC_CREATE_PROCESS_NARGS 6 67/* Remote Method id table */ 68#define FASTRPC_RMID_INIT_ATTACH 0 69#define FASTRPC_RMID_INIT_RELEASE 1 70#define FASTRPC_RMID_INIT_MMAP 4 71#define FASTRPC_RMID_INIT_MUNMAP 5 72#define FASTRPC_RMID_INIT_CREATE 6 73#define FASTRPC_RMID_INIT_CREATE_ATTR 7 74#define FASTRPC_RMID_INIT_CREATE_STATIC 8 75 76/* Protection Domain(PD) ids */ 77#define AUDIO_PD (0) /* also GUEST_OS PD? */ 78#define USER_PD (1) 79#define SENSORS_PD (2) 80 81#define miscdev_to_cctx(d) container_of(d, struct fastrpc_channel_ctx, miscdev) 82 83static const char *domains[FASTRPC_DEV_MAX] = { "adsp", "mdsp", 84 "sdsp", "cdsp"}; 85struct fastrpc_phy_page { 86 u64 addr; /* physical address */ 87 u64 size; /* size of contiguous region */ 88}; 89 90struct fastrpc_invoke_buf { 91 u32 num; /* number of contiguous regions */ 92 u32 pgidx; /* index to start of contiguous region */ 93}; 94 95struct fastrpc_remote_arg { 96 u64 pv; 97 u64 len; 98}; 99 100struct fastrpc_mmap_rsp_msg { 101 u64 vaddr; 102}; 103 104struct fastrpc_mmap_req_msg { 105 s32 pgid; 106 u32 flags; 107 u64 vaddr; 108 s32 num; 109}; 110 111struct fastrpc_munmap_req_msg { 112 s32 pgid; 113 u64 vaddr; 114 u64 size; 115}; 116 117struct fastrpc_msg { 118 int pid; /* process group id */ 119 int tid; /* thread id */ 120 u64 ctx; /* invoke caller context */ 121 u32 handle; /* handle to invoke */ 122 u32 sc; /* scalars structure describing the data */ 123 u64 addr; /* physical address */ 124 u64 size; /* size of contiguous region */ 125}; 126 127struct fastrpc_invoke_rsp { 128 u64 ctx; /* invoke caller context */ 129 int retval; /* invoke return value */ 130}; 131 132struct fastrpc_buf_overlap { 133 u64 start; 134 u64 end; 135 int raix; 136 u64 mstart; 137 u64 mend; 138 u64 offset; 139}; 140 141struct fastrpc_buf { 142 struct fastrpc_user *fl; 143 struct dma_buf *dmabuf; 144 struct device *dev; 145 void *virt; 146 u64 phys; 147 u64 size; 148 /* Lock for dma buf attachments */ 149 struct mutex lock; 150 struct list_head attachments; 151 /* mmap support */ 152 struct list_head node; /* list of user requested mmaps */ 153 uintptr_t raddr; 154}; 155 156struct fastrpc_dma_buf_attachment { 157 struct device *dev; 158 struct sg_table sgt; 159 struct list_head node; 160}; 161 162struct fastrpc_map { 163 struct list_head node; 164 struct fastrpc_user *fl; 165 int fd; 166 struct dma_buf *buf; 167 struct sg_table *table; 168 struct dma_buf_attachment *attach; 169 u64 phys; 170 u64 size; 171 void *va; 172 u64 len; 173 struct kref refcount; 174}; 175 176struct fastrpc_invoke_ctx { 177 int nscalars; 178 int nbufs; 179 int retval; 180 int pid; 181 int tgid; 182 u32 sc; 183 u32 *crc; 184 u64 ctxid; 185 u64 msg_sz; 186 struct kref refcount; 187 struct list_head node; /* list of ctxs */ 188 struct completion work; 189 struct work_struct put_work; 190 struct fastrpc_msg msg; 191 struct fastrpc_user *fl; 192 struct fastrpc_remote_arg *rpra; 193 struct fastrpc_map **maps; 194 struct fastrpc_buf *buf; 195 struct fastrpc_invoke_args *args; 196 struct fastrpc_buf_overlap *olaps; 197 struct fastrpc_channel_ctx *cctx; 198}; 199 200struct fastrpc_session_ctx { 201 struct device *dev; 202 int sid; 203 bool used; 204 bool valid; 205}; 206 207struct fastrpc_channel_ctx { 208 int domain_id; 209 int sesscount; 210 struct rpmsg_device *rpdev; 211 struct fastrpc_session_ctx session[FASTRPC_MAX_SESSIONS]; 212 spinlock_t lock; 213 struct idr ctx_idr; 214 struct list_head users; 215 struct miscdevice miscdev; 216 struct kref refcount; 217}; 218 219struct fastrpc_user { 220 struct list_head user; 221 struct list_head maps; 222 struct list_head pending; 223 struct list_head mmaps; 224 225 struct fastrpc_channel_ctx *cctx; 226 struct fastrpc_session_ctx *sctx; 227 struct fastrpc_buf *init_mem; 228 229 int tgid; 230 int pd; 231 /* Lock for lists */ 232 spinlock_t lock; 233 /* lock for allocations */ 234 struct mutex mutex; 235}; 236 237static void fastrpc_free_map(struct kref *ref) 238{ 239 struct fastrpc_map *map; 240 241 map = container_of(ref, struct fastrpc_map, refcount); 242 243 if (map->table) { 244 dma_buf_unmap_attachment(map->attach, map->table, 245 DMA_BIDIRECTIONAL); 246 dma_buf_detach(map->buf, map->attach); 247 dma_buf_put(map->buf); 248 } 249 250 if (map->fl) { 251 spin_lock(&map->fl->lock); 252 list_del(&map->node); 253 spin_unlock(&map->fl->lock); 254 map->fl = NULL; 255 } 256 257 kfree(map); 258} 259 260static void fastrpc_map_put(struct fastrpc_map *map) 261{ 262 if (map) 263 kref_put(&map->refcount, fastrpc_free_map); 264} 265 266static int fastrpc_map_get(struct fastrpc_map *map) 267{ 268 if (!map) 269 return -ENOENT; 270 271 return kref_get_unless_zero(&map->refcount) ? 0 : -ENOENT; 272} 273 274static int fastrpc_map_find(struct fastrpc_user *fl, int fd, 275 struct fastrpc_map **ppmap) 276{ 277 struct fastrpc_map *map = NULL; 278 279 mutex_lock(&fl->mutex); 280 list_for_each_entry(map, &fl->maps, node) { 281 if (map->fd == fd) { 282 fastrpc_map_get(map); 283 *ppmap = map; 284 mutex_unlock(&fl->mutex); 285 return 0; 286 } 287 } 288 mutex_unlock(&fl->mutex); 289 290 return -ENOENT; 291} 292 293static void fastrpc_buf_free(struct fastrpc_buf *buf) 294{ 295 dma_free_coherent(buf->dev, buf->size, buf->virt, 296 FASTRPC_PHYS(buf->phys)); 297 kfree(buf); 298} 299 300static int fastrpc_buf_alloc(struct fastrpc_user *fl, struct device *dev, 301 u64 size, struct fastrpc_buf **obuf) 302{ 303 struct fastrpc_buf *buf; 304 305 buf = kzalloc(sizeof(*buf), GFP_KERNEL); 306 if (!buf) 307 return -ENOMEM; 308 309 INIT_LIST_HEAD(&buf->attachments); 310 INIT_LIST_HEAD(&buf->node); 311 mutex_init(&buf->lock); 312 313 buf->fl = fl; 314 buf->virt = NULL; 315 buf->phys = 0; 316 buf->size = size; 317 buf->dev = dev; 318 buf->raddr = 0; 319 320 buf->virt = dma_alloc_coherent(dev, buf->size, (dma_addr_t *)&buf->phys, 321 GFP_KERNEL); 322 if (!buf->virt) { 323 mutex_destroy(&buf->lock); 324 kfree(buf); 325 return -ENOMEM; 326 } 327 328 if (fl->sctx && fl->sctx->sid) 329 buf->phys += ((u64)fl->sctx->sid << 32); 330 331 *obuf = buf; 332 333 return 0; 334} 335 336static void fastrpc_channel_ctx_free(struct kref *ref) 337{ 338 struct fastrpc_channel_ctx *cctx; 339 340 cctx = container_of(ref, struct fastrpc_channel_ctx, refcount); 341 342 kfree(cctx); 343} 344 345static void fastrpc_channel_ctx_get(struct fastrpc_channel_ctx *cctx) 346{ 347 kref_get(&cctx->refcount); 348} 349 350static void fastrpc_channel_ctx_put(struct fastrpc_channel_ctx *cctx) 351{ 352 kref_put(&cctx->refcount, fastrpc_channel_ctx_free); 353} 354 355static void fastrpc_context_free(struct kref *ref) 356{ 357 struct fastrpc_invoke_ctx *ctx; 358 struct fastrpc_channel_ctx *cctx; 359 unsigned long flags; 360 int i; 361 362 ctx = container_of(ref, struct fastrpc_invoke_ctx, refcount); 363 cctx = ctx->cctx; 364 365 for (i = 0; i < ctx->nscalars; i++) 366 fastrpc_map_put(ctx->maps[i]); 367 368 if (ctx->buf) 369 fastrpc_buf_free(ctx->buf); 370 371 spin_lock_irqsave(&cctx->lock, flags); 372 idr_remove(&cctx->ctx_idr, ctx->ctxid >> 4); 373 spin_unlock_irqrestore(&cctx->lock, flags); 374 375 kfree(ctx->maps); 376 kfree(ctx->olaps); 377 kfree(ctx); 378 379 fastrpc_channel_ctx_put(cctx); 380} 381 382static void fastrpc_context_get(struct fastrpc_invoke_ctx *ctx) 383{ 384 kref_get(&ctx->refcount); 385} 386 387static void fastrpc_context_put(struct fastrpc_invoke_ctx *ctx) 388{ 389 kref_put(&ctx->refcount, fastrpc_context_free); 390} 391 392static void fastrpc_context_put_wq(struct work_struct *work) 393{ 394 struct fastrpc_invoke_ctx *ctx = 395 container_of(work, struct fastrpc_invoke_ctx, put_work); 396 397 fastrpc_context_put(ctx); 398} 399 400#define CMP(aa, bb) ((aa) == (bb) ? 0 : (aa) < (bb) ? -1 : 1) 401static int olaps_cmp(const void *a, const void *b) 402{ 403 struct fastrpc_buf_overlap *pa = (struct fastrpc_buf_overlap *)a; 404 struct fastrpc_buf_overlap *pb = (struct fastrpc_buf_overlap *)b; 405 /* sort with lowest starting buffer first */ 406 int st = CMP(pa->start, pb->start); 407 /* sort with highest ending buffer first */ 408 int ed = CMP(pb->end, pa->end); 409 410 return st == 0 ? ed : st; 411} 412 413static void fastrpc_get_buff_overlaps(struct fastrpc_invoke_ctx *ctx) 414{ 415 u64 max_end = 0; 416 int i; 417 418 for (i = 0; i < ctx->nbufs; ++i) { 419 ctx->olaps[i].start = ctx->args[i].ptr; 420 ctx->olaps[i].end = ctx->olaps[i].start + ctx->args[i].length; 421 ctx->olaps[i].raix = i; 422 } 423 424 sort(ctx->olaps, ctx->nbufs, sizeof(*ctx->olaps), olaps_cmp, NULL); 425 426 for (i = 0; i < ctx->nbufs; ++i) { 427 /* Falling inside previous range */ 428 if (ctx->olaps[i].start < max_end) { 429 ctx->olaps[i].mstart = max_end; 430 ctx->olaps[i].mend = ctx->olaps[i].end; 431 ctx->olaps[i].offset = max_end - ctx->olaps[i].start; 432 433 if (ctx->olaps[i].end > max_end) { 434 max_end = ctx->olaps[i].end; 435 } else { 436 ctx->olaps[i].mend = 0; 437 ctx->olaps[i].mstart = 0; 438 } 439 440 } else { 441 ctx->olaps[i].mend = ctx->olaps[i].end; 442 ctx->olaps[i].mstart = ctx->olaps[i].start; 443 ctx->olaps[i].offset = 0; 444 max_end = ctx->olaps[i].end; 445 } 446 } 447} 448 449static struct fastrpc_invoke_ctx *fastrpc_context_alloc( 450 struct fastrpc_user *user, u32 kernel, u32 sc, 451 struct fastrpc_invoke_args *args) 452{ 453 struct fastrpc_channel_ctx *cctx = user->cctx; 454 struct fastrpc_invoke_ctx *ctx = NULL; 455 unsigned long flags; 456 int ret; 457 458 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 459 if (!ctx) 460 return ERR_PTR(-ENOMEM); 461 462 INIT_LIST_HEAD(&ctx->node); 463 ctx->fl = user; 464 ctx->nscalars = REMOTE_SCALARS_LENGTH(sc); 465 ctx->nbufs = REMOTE_SCALARS_INBUFS(sc) + 466 REMOTE_SCALARS_OUTBUFS(sc); 467 468 if (ctx->nscalars) { 469 ctx->maps = kcalloc(ctx->nscalars, 470 sizeof(*ctx->maps), GFP_KERNEL); 471 if (!ctx->maps) { 472 kfree(ctx); 473 return ERR_PTR(-ENOMEM); 474 } 475 ctx->olaps = kcalloc(ctx->nscalars, 476 sizeof(*ctx->olaps), GFP_KERNEL); 477 if (!ctx->olaps) { 478 kfree(ctx->maps); 479 kfree(ctx); 480 return ERR_PTR(-ENOMEM); 481 } 482 ctx->args = args; 483 fastrpc_get_buff_overlaps(ctx); 484 } 485 486 /* Released in fastrpc_context_put() */ 487 fastrpc_channel_ctx_get(cctx); 488 489 ctx->sc = sc; 490 ctx->retval = -1; 491 ctx->pid = current->pid; 492 ctx->tgid = user->tgid; 493 ctx->cctx = cctx; 494 init_completion(&ctx->work); 495 INIT_WORK(&ctx->put_work, fastrpc_context_put_wq); 496 497 spin_lock(&user->lock); 498 list_add_tail(&ctx->node, &user->pending); 499 spin_unlock(&user->lock); 500 501 spin_lock_irqsave(&cctx->lock, flags); 502 ret = idr_alloc_cyclic(&cctx->ctx_idr, ctx, 1, 503 FASTRPC_CTX_MAX, GFP_ATOMIC); 504 if (ret < 0) { 505 spin_unlock_irqrestore(&cctx->lock, flags); 506 goto err_idr; 507 } 508 ctx->ctxid = ret << 4; 509 spin_unlock_irqrestore(&cctx->lock, flags); 510 511 kref_init(&ctx->refcount); 512 513 return ctx; 514err_idr: 515 spin_lock(&user->lock); 516 list_del(&ctx->node); 517 spin_unlock(&user->lock); 518 fastrpc_channel_ctx_put(cctx); 519 kfree(ctx->maps); 520 kfree(ctx->olaps); 521 kfree(ctx); 522 523 return ERR_PTR(ret); 524} 525 526static struct sg_table * 527fastrpc_map_dma_buf(struct dma_buf_attachment *attachment, 528 enum dma_data_direction dir) 529{ 530 struct fastrpc_dma_buf_attachment *a = attachment->priv; 531 struct sg_table *table; 532 int ret; 533 534 table = &a->sgt; 535 536 ret = dma_map_sgtable(attachment->dev, table, dir, 0); 537 if (ret) 538 table = ERR_PTR(ret); 539 return table; 540} 541 542static void fastrpc_unmap_dma_buf(struct dma_buf_attachment *attach, 543 struct sg_table *table, 544 enum dma_data_direction dir) 545{ 546 dma_unmap_sgtable(attach->dev, table, dir, 0); 547} 548 549static void fastrpc_release(struct dma_buf *dmabuf) 550{ 551 struct fastrpc_buf *buffer = dmabuf->priv; 552 553 fastrpc_buf_free(buffer); 554} 555 556static int fastrpc_dma_buf_attach(struct dma_buf *dmabuf, 557 struct dma_buf_attachment *attachment) 558{ 559 struct fastrpc_dma_buf_attachment *a; 560 struct fastrpc_buf *buffer = dmabuf->priv; 561 int ret; 562 563 a = kzalloc(sizeof(*a), GFP_KERNEL); 564 if (!a) 565 return -ENOMEM; 566 567 ret = dma_get_sgtable(buffer->dev, &a->sgt, buffer->virt, 568 FASTRPC_PHYS(buffer->phys), buffer->size); 569 if (ret < 0) { 570 dev_err(buffer->dev, "failed to get scatterlist from DMA API\n"); 571 kfree(a); 572 return -EINVAL; 573 } 574 575 a->dev = attachment->dev; 576 INIT_LIST_HEAD(&a->node); 577 attachment->priv = a; 578 579 mutex_lock(&buffer->lock); 580 list_add(&a->node, &buffer->attachments); 581 mutex_unlock(&buffer->lock); 582 583 return 0; 584} 585 586static void fastrpc_dma_buf_detatch(struct dma_buf *dmabuf, 587 struct dma_buf_attachment *attachment) 588{ 589 struct fastrpc_dma_buf_attachment *a = attachment->priv; 590 struct fastrpc_buf *buffer = dmabuf->priv; 591 592 mutex_lock(&buffer->lock); 593 list_del(&a->node); 594 mutex_unlock(&buffer->lock); 595 sg_free_table(&a->sgt); 596 kfree(a); 597} 598 599static void *fastrpc_vmap(struct dma_buf *dmabuf) 600{ 601 struct fastrpc_buf *buf = dmabuf->priv; 602 603 return buf->virt; 604} 605 606static int fastrpc_mmap(struct dma_buf *dmabuf, 607 struct vm_area_struct *vma) 608{ 609 struct fastrpc_buf *buf = dmabuf->priv; 610 size_t size = vma->vm_end - vma->vm_start; 611 612 return dma_mmap_coherent(buf->dev, vma, buf->virt, 613 FASTRPC_PHYS(buf->phys), size); 614} 615 616static const struct dma_buf_ops fastrpc_dma_buf_ops = { 617 .attach = fastrpc_dma_buf_attach, 618 .detach = fastrpc_dma_buf_detatch, 619 .map_dma_buf = fastrpc_map_dma_buf, 620 .unmap_dma_buf = fastrpc_unmap_dma_buf, 621 .mmap = fastrpc_mmap, 622 .vmap = fastrpc_vmap, 623 .release = fastrpc_release, 624}; 625 626static int fastrpc_map_create(struct fastrpc_user *fl, int fd, 627 u64 len, struct fastrpc_map **ppmap) 628{ 629 struct fastrpc_session_ctx *sess = fl->sctx; 630 struct fastrpc_map *map = NULL; 631 int err = 0; 632 633 if (!fastrpc_map_find(fl, fd, ppmap)) 634 return 0; 635 636 map = kzalloc(sizeof(*map), GFP_KERNEL); 637 if (!map) 638 return -ENOMEM; 639 640 INIT_LIST_HEAD(&map->node); 641 map->fl = fl; 642 map->fd = fd; 643 map->buf = dma_buf_get(fd); 644 if (IS_ERR(map->buf)) { 645 err = PTR_ERR(map->buf); 646 goto get_err; 647 } 648 649 map->attach = dma_buf_attach(map->buf, sess->dev); 650 if (IS_ERR(map->attach)) { 651 dev_err(sess->dev, "Failed to attach dmabuf\n"); 652 err = PTR_ERR(map->attach); 653 goto attach_err; 654 } 655 656 map->table = dma_buf_map_attachment(map->attach, DMA_BIDIRECTIONAL); 657 if (IS_ERR(map->table)) { 658 err = PTR_ERR(map->table); 659 goto map_err; 660 } 661 662 map->phys = sg_dma_address(map->table->sgl); 663 map->phys += ((u64)fl->sctx->sid << 32); 664 map->size = len; 665 map->va = sg_virt(map->table->sgl); 666 map->len = len; 667 kref_init(&map->refcount); 668 669 spin_lock(&fl->lock); 670 list_add_tail(&map->node, &fl->maps); 671 spin_unlock(&fl->lock); 672 *ppmap = map; 673 674 return 0; 675 676map_err: 677 dma_buf_detach(map->buf, map->attach); 678attach_err: 679 dma_buf_put(map->buf); 680get_err: 681 kfree(map); 682 683 return err; 684} 685 686/* 687 * Fastrpc payload buffer with metadata looks like: 688 * 689 * >>>>>> START of METADATA <<<<<<<<< 690 * +---------------------------------+ 691 * | Arguments | 692 * | type:(struct fastrpc_remote_arg)| 693 * | (0 - N) | 694 * +---------------------------------+ 695 * | Invoke Buffer list | 696 * | type:(struct fastrpc_invoke_buf)| 697 * | (0 - N) | 698 * +---------------------------------+ 699 * | Page info list | 700 * | type:(struct fastrpc_phy_page) | 701 * | (0 - N) | 702 * +---------------------------------+ 703 * | Optional info | 704 * |(can be specific to SoC/Firmware)| 705 * +---------------------------------+ 706 * >>>>>>>> END of METADATA <<<<<<<<< 707 * +---------------------------------+ 708 * | Inline ARGS | 709 * | (0-N) | 710 * +---------------------------------+ 711 */ 712 713static int fastrpc_get_meta_size(struct fastrpc_invoke_ctx *ctx) 714{ 715 int size = 0; 716 717 size = (sizeof(struct fastrpc_remote_arg) + 718 sizeof(struct fastrpc_invoke_buf) + 719 sizeof(struct fastrpc_phy_page)) * ctx->nscalars + 720 sizeof(u64) * FASTRPC_MAX_FDLIST + 721 sizeof(u32) * FASTRPC_MAX_CRCLIST; 722 723 return size; 724} 725 726static u64 fastrpc_get_payload_size(struct fastrpc_invoke_ctx *ctx, int metalen) 727{ 728 u64 size = 0; 729 int oix; 730 731 size = ALIGN(metalen, FASTRPC_ALIGN); 732 for (oix = 0; oix < ctx->nbufs; oix++) { 733 int i = ctx->olaps[oix].raix; 734 735 if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1) { 736 737 if (ctx->olaps[oix].offset == 0) 738 size = ALIGN(size, FASTRPC_ALIGN); 739 740 size += (ctx->olaps[oix].mend - ctx->olaps[oix].mstart); 741 } 742 } 743 744 return size; 745} 746 747static int fastrpc_create_maps(struct fastrpc_invoke_ctx *ctx) 748{ 749 struct device *dev = ctx->fl->sctx->dev; 750 int i, err; 751 752 for (i = 0; i < ctx->nscalars; ++i) { 753 /* Make sure reserved field is set to 0 */ 754 if (ctx->args[i].reserved) 755 return -EINVAL; 756 757 if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1 || 758 ctx->args[i].length == 0) 759 continue; 760 761 err = fastrpc_map_create(ctx->fl, ctx->args[i].fd, 762 ctx->args[i].length, &ctx->maps[i]); 763 if (err) { 764 dev_err(dev, "Error Creating map %d\n", err); 765 return -EINVAL; 766 } 767 768 } 769 return 0; 770} 771 772static int fastrpc_get_args(u32 kernel, struct fastrpc_invoke_ctx *ctx) 773{ 774 struct device *dev = ctx->fl->sctx->dev; 775 struct fastrpc_remote_arg *rpra; 776 struct fastrpc_invoke_buf *list; 777 struct fastrpc_phy_page *pages; 778 int inbufs, i, oix, err = 0; 779 u64 len, rlen, pkt_size; 780 u64 pg_start, pg_end; 781 uintptr_t args; 782 int metalen; 783 784 inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); 785 metalen = fastrpc_get_meta_size(ctx); 786 pkt_size = fastrpc_get_payload_size(ctx, metalen); 787 788 err = fastrpc_create_maps(ctx); 789 if (err) 790 return err; 791 792 ctx->msg_sz = pkt_size; 793 794 err = fastrpc_buf_alloc(ctx->fl, dev, pkt_size, &ctx->buf); 795 if (err) 796 return err; 797 798 rpra = ctx->buf->virt; 799 list = ctx->buf->virt + ctx->nscalars * sizeof(*rpra); 800 pages = ctx->buf->virt + ctx->nscalars * (sizeof(*list) + 801 sizeof(*rpra)); 802 args = (uintptr_t)ctx->buf->virt + metalen; 803 rlen = pkt_size - metalen; 804 ctx->rpra = rpra; 805 806 for (oix = 0; oix < ctx->nbufs; ++oix) { 807 int mlen; 808 809 i = ctx->olaps[oix].raix; 810 len = ctx->args[i].length; 811 812 rpra[i].pv = 0; 813 rpra[i].len = len; 814 list[i].num = len ? 1 : 0; 815 list[i].pgidx = i; 816 817 if (!len) 818 continue; 819 820 if (ctx->maps[i]) { 821 struct vm_area_struct *vma = NULL; 822 823 rpra[i].pv = (u64) ctx->args[i].ptr; 824 pages[i].addr = ctx->maps[i]->phys; 825 826 mmap_read_lock(current->mm); 827 vma = find_vma(current->mm, ctx->args[i].ptr); 828 if (vma) 829 pages[i].addr += ctx->args[i].ptr - 830 vma->vm_start; 831 mmap_read_unlock(current->mm); 832 833 pg_start = (ctx->args[i].ptr & PAGE_MASK) >> PAGE_SHIFT; 834 pg_end = ((ctx->args[i].ptr + len - 1) & PAGE_MASK) >> 835 PAGE_SHIFT; 836 pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; 837 838 } else { 839 840 if (ctx->olaps[oix].offset == 0) { 841 rlen -= ALIGN(args, FASTRPC_ALIGN) - args; 842 args = ALIGN(args, FASTRPC_ALIGN); 843 } 844 845 mlen = ctx->olaps[oix].mend - ctx->olaps[oix].mstart; 846 847 if (rlen < mlen) 848 goto bail; 849 850 rpra[i].pv = args - ctx->olaps[oix].offset; 851 pages[i].addr = ctx->buf->phys - 852 ctx->olaps[oix].offset + 853 (pkt_size - rlen); 854 pages[i].addr = pages[i].addr & PAGE_MASK; 855 856 pg_start = (args & PAGE_MASK) >> PAGE_SHIFT; 857 pg_end = ((args + len - 1) & PAGE_MASK) >> PAGE_SHIFT; 858 pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; 859 args = args + mlen; 860 rlen -= mlen; 861 } 862 863 if (i < inbufs && !ctx->maps[i]) { 864 void *dst = (void *)(uintptr_t)rpra[i].pv; 865 void *src = (void *)(uintptr_t)ctx->args[i].ptr; 866 867 if (!kernel) { 868 if (copy_from_user(dst, (void __user *)src, 869 len)) { 870 err = -EFAULT; 871 goto bail; 872 } 873 } else { 874 memcpy(dst, src, len); 875 } 876 } 877 } 878 879 for (i = ctx->nbufs; i < ctx->nscalars; ++i) { 880 rpra[i].pv = (u64) ctx->args[i].ptr; 881 rpra[i].len = ctx->args[i].length; 882 list[i].num = ctx->args[i].length ? 1 : 0; 883 list[i].pgidx = i; 884 pages[i].addr = ctx->maps[i]->phys; 885 pages[i].size = ctx->maps[i]->size; 886 } 887 888bail: 889 if (err) 890 dev_err(dev, "Error: get invoke args failed:%d\n", err); 891 892 return err; 893} 894 895static int fastrpc_put_args(struct fastrpc_invoke_ctx *ctx, 896 u32 kernel) 897{ 898 struct fastrpc_remote_arg *rpra = ctx->rpra; 899 int i, inbufs; 900 901 inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); 902 903 for (i = inbufs; i < ctx->nbufs; ++i) { 904 void *src = (void *)(uintptr_t)rpra[i].pv; 905 void *dst = (void *)(uintptr_t)ctx->args[i].ptr; 906 u64 len = rpra[i].len; 907 908 if (!kernel) { 909 if (copy_to_user((void __user *)dst, src, len)) 910 return -EFAULT; 911 } else { 912 memcpy(dst, src, len); 913 } 914 } 915 916 return 0; 917} 918 919static int fastrpc_invoke_send(struct fastrpc_session_ctx *sctx, 920 struct fastrpc_invoke_ctx *ctx, 921 u32 kernel, uint32_t handle) 922{ 923 struct fastrpc_channel_ctx *cctx; 924 struct fastrpc_user *fl = ctx->fl; 925 struct fastrpc_msg *msg = &ctx->msg; 926 int ret; 927 928 cctx = fl->cctx; 929 msg->pid = fl->tgid; 930 msg->tid = current->pid; 931 932 if (kernel) 933 msg->pid = 0; 934 935 msg->ctx = ctx->ctxid | fl->pd; 936 msg->handle = handle; 937 msg->sc = ctx->sc; 938 msg->addr = ctx->buf ? ctx->buf->phys : 0; 939 msg->size = roundup(ctx->msg_sz, PAGE_SIZE); 940 fastrpc_context_get(ctx); 941 942 ret = rpmsg_send(cctx->rpdev->ept, (void *)msg, sizeof(*msg)); 943 944 if (ret) 945 fastrpc_context_put(ctx); 946 947 return ret; 948 949} 950 951static int fastrpc_internal_invoke(struct fastrpc_user *fl, u32 kernel, 952 u32 handle, u32 sc, 953 struct fastrpc_invoke_args *args) 954{ 955 struct fastrpc_invoke_ctx *ctx = NULL; 956 int err = 0; 957 958 if (!fl->sctx) 959 return -EINVAL; 960 961 if (!fl->cctx->rpdev) 962 return -EPIPE; 963 964 if (handle == FASTRPC_INIT_HANDLE && !kernel) { 965 dev_warn_ratelimited(fl->sctx->dev, "user app trying to send a kernel RPC message (%d)\n", handle); 966 return -EPERM; 967 } 968 969 ctx = fastrpc_context_alloc(fl, kernel, sc, args); 970 if (IS_ERR(ctx)) 971 return PTR_ERR(ctx); 972 973 if (ctx->nscalars) { 974 err = fastrpc_get_args(kernel, ctx); 975 if (err) 976 goto bail; 977 } 978 979 /* make sure that all CPU memory writes are seen by DSP */ 980 dma_wmb(); 981 /* Send invoke buffer to remote dsp */ 982 err = fastrpc_invoke_send(fl->sctx, ctx, kernel, handle); 983 if (err) 984 goto bail; 985 986 if (kernel) { 987 if (!wait_for_completion_timeout(&ctx->work, 10 * HZ)) 988 err = -ETIMEDOUT; 989 } else { 990 err = wait_for_completion_interruptible(&ctx->work); 991 } 992 993 if (err) 994 goto bail; 995 996 if (ctx->nscalars) { 997 /* make sure that all memory writes by DSP are seen by CPU */ 998 dma_rmb(); 999 /* populate all the output buffers with results */ 1000 err = fastrpc_put_args(ctx, kernel); 1001 if (err) 1002 goto bail; 1003 } 1004 1005 /* Check the response from remote dsp */ 1006 err = ctx->retval; 1007 if (err) 1008 goto bail; 1009 1010bail: 1011 if (err != -ERESTARTSYS && err != -ETIMEDOUT) { 1012 /* We are done with this compute context */ 1013 spin_lock(&fl->lock); 1014 list_del(&ctx->node); 1015 spin_unlock(&fl->lock); 1016 fastrpc_context_put(ctx); 1017 } 1018 if (err) 1019 dev_dbg(fl->sctx->dev, "Error: Invoke Failed %d\n", err); 1020 1021 return err; 1022} 1023 1024static int fastrpc_init_create_process(struct fastrpc_user *fl, 1025 char __user *argp) 1026{ 1027 struct fastrpc_init_create init; 1028 struct fastrpc_invoke_args *args; 1029 struct fastrpc_phy_page pages[1]; 1030 struct fastrpc_map *map = NULL; 1031 struct fastrpc_buf *imem = NULL; 1032 int memlen; 1033 int err; 1034 struct { 1035 int pgid; 1036 u32 namelen; 1037 u32 filelen; 1038 u32 pageslen; 1039 u32 attrs; 1040 u32 siglen; 1041 } inbuf; 1042 u32 sc; 1043 1044 args = kcalloc(FASTRPC_CREATE_PROCESS_NARGS, sizeof(*args), GFP_KERNEL); 1045 if (!args) 1046 return -ENOMEM; 1047 1048 if (copy_from_user(&init, argp, sizeof(init))) { 1049 err = -EFAULT; 1050 goto err; 1051 } 1052 1053 if (init.filelen > INIT_FILELEN_MAX) { 1054 err = -EINVAL; 1055 goto err; 1056 } 1057 1058 inbuf.pgid = fl->tgid; 1059 inbuf.namelen = strlen(current->comm) + 1; 1060 inbuf.filelen = init.filelen; 1061 inbuf.pageslen = 1; 1062 inbuf.attrs = init.attrs; 1063 inbuf.siglen = init.siglen; 1064 fl->pd = USER_PD; 1065 1066 if (init.filelen && init.filefd) { 1067 err = fastrpc_map_create(fl, init.filefd, init.filelen, &map); 1068 if (err) 1069 goto err; 1070 } 1071 1072 memlen = ALIGN(max(INIT_FILELEN_MAX, (int)init.filelen * 4), 1073 1024 * 1024); 1074 err = fastrpc_buf_alloc(fl, fl->sctx->dev, memlen, 1075 &imem); 1076 if (err) 1077 goto err_alloc; 1078 1079 fl->init_mem = imem; 1080 args[0].ptr = (u64)(uintptr_t)&inbuf; 1081 args[0].length = sizeof(inbuf); 1082 args[0].fd = -1; 1083 1084 args[1].ptr = (u64)(uintptr_t)current->comm; 1085 args[1].length = inbuf.namelen; 1086 args[1].fd = -1; 1087 1088 args[2].ptr = (u64) init.file; 1089 args[2].length = inbuf.filelen; 1090 args[2].fd = init.filefd; 1091 1092 pages[0].addr = imem->phys; 1093 pages[0].size = imem->size; 1094 1095 args[3].ptr = (u64)(uintptr_t) pages; 1096 args[3].length = 1 * sizeof(*pages); 1097 args[3].fd = -1; 1098 1099 args[4].ptr = (u64)(uintptr_t)&inbuf.attrs; 1100 args[4].length = sizeof(inbuf.attrs); 1101 args[4].fd = -1; 1102 1103 args[5].ptr = (u64)(uintptr_t) &inbuf.siglen; 1104 args[5].length = sizeof(inbuf.siglen); 1105 args[5].fd = -1; 1106 1107 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE, 4, 0); 1108 if (init.attrs) 1109 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE_ATTR, 4, 0); 1110 1111 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1112 sc, args); 1113 if (err) 1114 goto err_invoke; 1115 1116 kfree(args); 1117 1118 return 0; 1119 1120err_invoke: 1121 fl->init_mem = NULL; 1122 fastrpc_buf_free(imem); 1123err_alloc: 1124 fastrpc_map_put(map); 1125err: 1126 kfree(args); 1127 1128 return err; 1129} 1130 1131static struct fastrpc_session_ctx *fastrpc_session_alloc( 1132 struct fastrpc_channel_ctx *cctx) 1133{ 1134 struct fastrpc_session_ctx *session = NULL; 1135 unsigned long flags; 1136 int i; 1137 1138 spin_lock_irqsave(&cctx->lock, flags); 1139 for (i = 0; i < cctx->sesscount; i++) { 1140 if (!cctx->session[i].used && cctx->session[i].valid) { 1141 cctx->session[i].used = true; 1142 session = &cctx->session[i]; 1143 break; 1144 } 1145 } 1146 spin_unlock_irqrestore(&cctx->lock, flags); 1147 1148 return session; 1149} 1150 1151static void fastrpc_session_free(struct fastrpc_channel_ctx *cctx, 1152 struct fastrpc_session_ctx *session) 1153{ 1154 unsigned long flags; 1155 1156 spin_lock_irqsave(&cctx->lock, flags); 1157 session->used = false; 1158 spin_unlock_irqrestore(&cctx->lock, flags); 1159} 1160 1161static int fastrpc_release_current_dsp_process(struct fastrpc_user *fl) 1162{ 1163 struct fastrpc_invoke_args args[1]; 1164 int tgid = 0; 1165 u32 sc; 1166 1167 tgid = fl->tgid; 1168 args[0].ptr = (u64)(uintptr_t) &tgid; 1169 args[0].length = sizeof(tgid); 1170 args[0].fd = -1; 1171 args[0].reserved = 0; 1172 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_RELEASE, 1, 0); 1173 1174 return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1175 sc, &args[0]); 1176} 1177 1178static int fastrpc_device_release(struct inode *inode, struct file *file) 1179{ 1180 struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; 1181 struct fastrpc_channel_ctx *cctx = fl->cctx; 1182 struct fastrpc_invoke_ctx *ctx, *n; 1183 struct fastrpc_map *map, *m; 1184 struct fastrpc_buf *buf, *b; 1185 unsigned long flags; 1186 1187 fastrpc_release_current_dsp_process(fl); 1188 1189 spin_lock_irqsave(&cctx->lock, flags); 1190 list_del(&fl->user); 1191 spin_unlock_irqrestore(&cctx->lock, flags); 1192 1193 if (fl->init_mem) 1194 fastrpc_buf_free(fl->init_mem); 1195 1196 list_for_each_entry_safe(ctx, n, &fl->pending, node) { 1197 list_del(&ctx->node); 1198 fastrpc_context_put(ctx); 1199 } 1200 1201 list_for_each_entry_safe(map, m, &fl->maps, node) 1202 fastrpc_map_put(map); 1203 1204 list_for_each_entry_safe(buf, b, &fl->mmaps, node) { 1205 list_del(&buf->node); 1206 fastrpc_buf_free(buf); 1207 } 1208 1209 fastrpc_session_free(cctx, fl->sctx); 1210 fastrpc_channel_ctx_put(cctx); 1211 1212 mutex_destroy(&fl->mutex); 1213 kfree(fl); 1214 file->private_data = NULL; 1215 1216 return 0; 1217} 1218 1219static int fastrpc_device_open(struct inode *inode, struct file *filp) 1220{ 1221 struct fastrpc_channel_ctx *cctx = miscdev_to_cctx(filp->private_data); 1222 struct fastrpc_user *fl = NULL; 1223 unsigned long flags; 1224 1225 fl = kzalloc(sizeof(*fl), GFP_KERNEL); 1226 if (!fl) 1227 return -ENOMEM; 1228 1229 /* Released in fastrpc_device_release() */ 1230 fastrpc_channel_ctx_get(cctx); 1231 1232 filp->private_data = fl; 1233 spin_lock_init(&fl->lock); 1234 mutex_init(&fl->mutex); 1235 INIT_LIST_HEAD(&fl->pending); 1236 INIT_LIST_HEAD(&fl->maps); 1237 INIT_LIST_HEAD(&fl->mmaps); 1238 INIT_LIST_HEAD(&fl->user); 1239 fl->tgid = current->tgid; 1240 fl->cctx = cctx; 1241 1242 fl->sctx = fastrpc_session_alloc(cctx); 1243 if (!fl->sctx) { 1244 dev_err(&cctx->rpdev->dev, "No session available\n"); 1245 mutex_destroy(&fl->mutex); 1246 kfree(fl); 1247 1248 return -EBUSY; 1249 } 1250 1251 spin_lock_irqsave(&cctx->lock, flags); 1252 list_add_tail(&fl->user, &cctx->users); 1253 spin_unlock_irqrestore(&cctx->lock, flags); 1254 1255 return 0; 1256} 1257 1258static int fastrpc_dmabuf_alloc(struct fastrpc_user *fl, char __user *argp) 1259{ 1260 struct fastrpc_alloc_dma_buf bp; 1261 DEFINE_DMA_BUF_EXPORT_INFO(exp_info); 1262 struct fastrpc_buf *buf = NULL; 1263 int err; 1264 1265 if (copy_from_user(&bp, argp, sizeof(bp))) 1266 return -EFAULT; 1267 1268 err = fastrpc_buf_alloc(fl, fl->sctx->dev, bp.size, &buf); 1269 if (err) 1270 return err; 1271 exp_info.ops = &fastrpc_dma_buf_ops; 1272 exp_info.size = bp.size; 1273 exp_info.flags = O_RDWR; 1274 exp_info.priv = buf; 1275 buf->dmabuf = dma_buf_export(&exp_info); 1276 if (IS_ERR(buf->dmabuf)) { 1277 err = PTR_ERR(buf->dmabuf); 1278 fastrpc_buf_free(buf); 1279 return err; 1280 } 1281 1282 bp.fd = dma_buf_fd(buf->dmabuf, O_ACCMODE); 1283 if (bp.fd < 0) { 1284 dma_buf_put(buf->dmabuf); 1285 return -EINVAL; 1286 } 1287 1288 if (copy_to_user(argp, &bp, sizeof(bp))) { 1289 /* 1290 * The usercopy failed, but we can't do much about it, as 1291 * dma_buf_fd() already called fd_install() and made the 1292 * file descriptor accessible for the current process. It 1293 * might already be closed and dmabuf no longer valid when 1294 * we reach this point. Therefore "leak" the fd and rely on 1295 * the process exit path to do any required cleanup. 1296 */ 1297 return -EFAULT; 1298 } 1299 1300 return 0; 1301} 1302 1303static int fastrpc_init_attach(struct fastrpc_user *fl, int pd) 1304{ 1305 struct fastrpc_invoke_args args[1]; 1306 int tgid = fl->tgid; 1307 u32 sc; 1308 1309 args[0].ptr = (u64)(uintptr_t) &tgid; 1310 args[0].length = sizeof(tgid); 1311 args[0].fd = -1; 1312 args[0].reserved = 0; 1313 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_ATTACH, 1, 0); 1314 fl->pd = pd; 1315 1316 return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1317 sc, &args[0]); 1318} 1319 1320static int fastrpc_invoke(struct fastrpc_user *fl, char __user *argp) 1321{ 1322 struct fastrpc_invoke_args *args = NULL; 1323 struct fastrpc_invoke inv; 1324 u32 nscalars; 1325 int err; 1326 1327 if (copy_from_user(&inv, argp, sizeof(inv))) 1328 return -EFAULT; 1329 1330 /* nscalars is truncated here to max supported value */ 1331 nscalars = REMOTE_SCALARS_LENGTH(inv.sc); 1332 if (nscalars) { 1333 args = kcalloc(nscalars, sizeof(*args), GFP_KERNEL); 1334 if (!args) 1335 return -ENOMEM; 1336 1337 if (copy_from_user(args, (void __user *)(uintptr_t)inv.args, 1338 nscalars * sizeof(*args))) { 1339 kfree(args); 1340 return -EFAULT; 1341 } 1342 } 1343 1344 err = fastrpc_internal_invoke(fl, false, inv.handle, inv.sc, args); 1345 kfree(args); 1346 1347 return err; 1348} 1349 1350static int fastrpc_req_munmap_impl(struct fastrpc_user *fl, 1351 struct fastrpc_req_munmap *req) 1352{ 1353 struct fastrpc_invoke_args args[1] = { [0] = { 0 } }; 1354 struct fastrpc_buf *buf = NULL, *iter, *b; 1355 struct fastrpc_munmap_req_msg req_msg; 1356 struct device *dev = fl->sctx->dev; 1357 int err; 1358 u32 sc; 1359 1360 spin_lock(&fl->lock); 1361 list_for_each_entry_safe(iter, b, &fl->mmaps, node) { 1362 if ((iter->raddr == req->vaddrout) && (iter->size == req->size)) { 1363 buf = iter; 1364 break; 1365 } 1366 } 1367 spin_unlock(&fl->lock); 1368 1369 if (!buf) { 1370 dev_err(dev, "mmap not in list\n"); 1371 return -EINVAL; 1372 } 1373 1374 req_msg.pgid = fl->tgid; 1375 req_msg.size = buf->size; 1376 req_msg.vaddr = buf->raddr; 1377 1378 args[0].ptr = (u64) (uintptr_t) &req_msg; 1379 args[0].length = sizeof(req_msg); 1380 1381 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MUNMAP, 1, 0); 1382 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, 1383 &args[0]); 1384 if (!err) { 1385 dev_dbg(dev, "unmmap\tpt 0x%09lx OK\n", buf->raddr); 1386 spin_lock(&fl->lock); 1387 list_del(&buf->node); 1388 spin_unlock(&fl->lock); 1389 fastrpc_buf_free(buf); 1390 } else { 1391 dev_err(dev, "unmmap\tpt 0x%09lx ERROR\n", buf->raddr); 1392 } 1393 1394 return err; 1395} 1396 1397static int fastrpc_req_munmap(struct fastrpc_user *fl, char __user *argp) 1398{ 1399 struct fastrpc_req_munmap req; 1400 1401 if (copy_from_user(&req, argp, sizeof(req))) 1402 return -EFAULT; 1403 1404 return fastrpc_req_munmap_impl(fl, &req); 1405} 1406 1407static int fastrpc_req_mmap(struct fastrpc_user *fl, char __user *argp) 1408{ 1409 struct fastrpc_invoke_args args[3] = { [0 ... 2] = { 0 } }; 1410 struct fastrpc_buf *buf = NULL; 1411 struct fastrpc_mmap_req_msg req_msg; 1412 struct fastrpc_mmap_rsp_msg rsp_msg; 1413 struct fastrpc_req_munmap req_unmap; 1414 struct fastrpc_phy_page pages; 1415 struct fastrpc_req_mmap req; 1416 struct device *dev = fl->sctx->dev; 1417 int err; 1418 u32 sc; 1419 1420 if (copy_from_user(&req, argp, sizeof(req))) 1421 return -EFAULT; 1422 1423 if (req.flags != ADSP_MMAP_ADD_PAGES) { 1424 dev_err(dev, "flag not supported 0x%x\n", req.flags); 1425 return -EINVAL; 1426 } 1427 1428 if (req.vaddrin) { 1429 dev_err(dev, "adding user allocated pages is not supported\n"); 1430 return -EINVAL; 1431 } 1432 1433 err = fastrpc_buf_alloc(fl, fl->sctx->dev, req.size, &buf); 1434 if (err) { 1435 dev_err(dev, "failed to allocate buffer\n"); 1436 return err; 1437 } 1438 1439 req_msg.pgid = fl->tgid; 1440 req_msg.flags = req.flags; 1441 req_msg.vaddr = req.vaddrin; 1442 req_msg.num = sizeof(pages); 1443 1444 args[0].ptr = (u64) (uintptr_t) &req_msg; 1445 args[0].length = sizeof(req_msg); 1446 1447 pages.addr = buf->phys; 1448 pages.size = buf->size; 1449 1450 args[1].ptr = (u64) (uintptr_t) &pages; 1451 args[1].length = sizeof(pages); 1452 1453 args[2].ptr = (u64) (uintptr_t) &rsp_msg; 1454 args[2].length = sizeof(rsp_msg); 1455 1456 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MMAP, 2, 1); 1457 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, 1458 &args[0]); 1459 if (err) { 1460 dev_err(dev, "mmap error (len 0x%08llx)\n", buf->size); 1461 goto err_invoke; 1462 } 1463 1464 /* update the buffer to be able to deallocate the memory on the DSP */ 1465 buf->raddr = (uintptr_t) rsp_msg.vaddr; 1466 1467 /* let the client know the address to use */ 1468 req.vaddrout = rsp_msg.vaddr; 1469 1470 spin_lock(&fl->lock); 1471 list_add_tail(&buf->node, &fl->mmaps); 1472 spin_unlock(&fl->lock); 1473 1474 if (copy_to_user((void __user *)argp, &req, sizeof(req))) { 1475 /* unmap the memory and release the buffer */ 1476 req_unmap.vaddrout = buf->raddr; 1477 req_unmap.size = buf->size; 1478 fastrpc_req_munmap_impl(fl, &req_unmap); 1479 return -EFAULT; 1480 } 1481 1482 dev_dbg(dev, "mmap\t\tpt 0x%09lx OK [len 0x%08llx]\n", 1483 buf->raddr, buf->size); 1484 1485 return 0; 1486 1487err_invoke: 1488 fastrpc_buf_free(buf); 1489 1490 return err; 1491} 1492 1493static long fastrpc_device_ioctl(struct file *file, unsigned int cmd, 1494 unsigned long arg) 1495{ 1496 struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; 1497 char __user *argp = (char __user *)arg; 1498 int err; 1499 1500 switch (cmd) { 1501 case FASTRPC_IOCTL_INVOKE: 1502 err = fastrpc_invoke(fl, argp); 1503 break; 1504 case FASTRPC_IOCTL_INIT_ATTACH: 1505 err = fastrpc_init_attach(fl, AUDIO_PD); 1506 break; 1507 case FASTRPC_IOCTL_INIT_ATTACH_SNS: 1508 err = fastrpc_init_attach(fl, SENSORS_PD); 1509 break; 1510 case FASTRPC_IOCTL_INIT_CREATE: 1511 err = fastrpc_init_create_process(fl, argp); 1512 break; 1513 case FASTRPC_IOCTL_ALLOC_DMA_BUFF: 1514 err = fastrpc_dmabuf_alloc(fl, argp); 1515 break; 1516 case FASTRPC_IOCTL_MMAP: 1517 err = fastrpc_req_mmap(fl, argp); 1518 break; 1519 case FASTRPC_IOCTL_MUNMAP: 1520 err = fastrpc_req_munmap(fl, argp); 1521 break; 1522 default: 1523 err = -ENOTTY; 1524 break; 1525 } 1526 1527 return err; 1528} 1529 1530static const struct file_operations fastrpc_fops = { 1531 .open = fastrpc_device_open, 1532 .release = fastrpc_device_release, 1533 .unlocked_ioctl = fastrpc_device_ioctl, 1534 .compat_ioctl = fastrpc_device_ioctl, 1535}; 1536 1537static int fastrpc_cb_probe(struct platform_device *pdev) 1538{ 1539 struct fastrpc_channel_ctx *cctx; 1540 struct fastrpc_session_ctx *sess; 1541 struct device *dev = &pdev->dev; 1542 int i, sessions = 0; 1543 unsigned long flags; 1544 int rc; 1545 1546 cctx = dev_get_drvdata(dev->parent); 1547 if (!cctx) 1548 return -EINVAL; 1549 1550 of_property_read_u32(dev->of_node, "qcom,nsessions", &sessions); 1551 1552 spin_lock_irqsave(&cctx->lock, flags); 1553 if (cctx->sesscount >= FASTRPC_MAX_SESSIONS) { 1554 dev_err(&pdev->dev, "too many sessions\n"); 1555 spin_unlock_irqrestore(&cctx->lock, flags); 1556 return -ENOSPC; 1557 } 1558 sess = &cctx->session[cctx->sesscount++]; 1559 sess->used = false; 1560 sess->valid = true; 1561 sess->dev = dev; 1562 dev_set_drvdata(dev, sess); 1563 1564 if (of_property_read_u32(dev->of_node, "reg", &sess->sid)) 1565 dev_info(dev, "FastRPC Session ID not specified in DT\n"); 1566 1567 if (sessions > 0) { 1568 struct fastrpc_session_ctx *dup_sess; 1569 1570 for (i = 1; i < sessions; i++) { 1571 if (cctx->sesscount >= FASTRPC_MAX_SESSIONS) 1572 break; 1573 dup_sess = &cctx->session[cctx->sesscount++]; 1574 memcpy(dup_sess, sess, sizeof(*dup_sess)); 1575 } 1576 } 1577 spin_unlock_irqrestore(&cctx->lock, flags); 1578 rc = dma_set_mask(dev, DMA_BIT_MASK(32)); 1579 if (rc) { 1580 dev_err(dev, "32-bit DMA enable failed\n"); 1581 return rc; 1582 } 1583 1584 return 0; 1585} 1586 1587static int fastrpc_cb_remove(struct platform_device *pdev) 1588{ 1589 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(pdev->dev.parent); 1590 struct fastrpc_session_ctx *sess = dev_get_drvdata(&pdev->dev); 1591 unsigned long flags; 1592 int i; 1593 1594 spin_lock_irqsave(&cctx->lock, flags); 1595 for (i = 0; i < FASTRPC_MAX_SESSIONS; i++) { 1596 if (cctx->session[i].sid == sess->sid) { 1597 cctx->session[i].valid = false; 1598 cctx->sesscount--; 1599 } 1600 } 1601 spin_unlock_irqrestore(&cctx->lock, flags); 1602 1603 return 0; 1604} 1605 1606static const struct of_device_id fastrpc_match_table[] = { 1607 { .compatible = "qcom,fastrpc-compute-cb", }, 1608 {} 1609}; 1610 1611static struct platform_driver fastrpc_cb_driver = { 1612 .probe = fastrpc_cb_probe, 1613 .remove = fastrpc_cb_remove, 1614 .driver = { 1615 .name = "qcom,fastrpc-cb", 1616 .of_match_table = fastrpc_match_table, 1617 .suppress_bind_attrs = true, 1618 }, 1619}; 1620 1621static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev) 1622{ 1623 struct device *rdev = &rpdev->dev; 1624 struct fastrpc_channel_ctx *data; 1625 int i, err, domain_id = -1; 1626 const char *domain; 1627 1628 err = of_property_read_string(rdev->of_node, "label", &domain); 1629 if (err) { 1630 dev_info(rdev, "FastRPC Domain not specified in DT\n"); 1631 return err; 1632 } 1633 1634 for (i = 0; i <= CDSP_DOMAIN_ID; i++) { 1635 if (!strcmp(domains[i], domain)) { 1636 domain_id = i; 1637 break; 1638 } 1639 } 1640 1641 if (domain_id < 0) { 1642 dev_info(rdev, "FastRPC Invalid Domain ID %d\n", domain_id); 1643 return -EINVAL; 1644 } 1645 1646 data = kzalloc(sizeof(*data), GFP_KERNEL); 1647 if (!data) 1648 return -ENOMEM; 1649 1650 data->miscdev.minor = MISC_DYNAMIC_MINOR; 1651 data->miscdev.name = devm_kasprintf(rdev, GFP_KERNEL, "fastrpc-%s", 1652 domains[domain_id]); 1653 data->miscdev.fops = &fastrpc_fops; 1654 err = misc_register(&data->miscdev); 1655 if (err) { 1656 kfree(data); 1657 return err; 1658 } 1659 1660 kref_init(&data->refcount); 1661 1662 dev_set_drvdata(&rpdev->dev, data); 1663 dma_set_mask_and_coherent(rdev, DMA_BIT_MASK(32)); 1664 INIT_LIST_HEAD(&data->users); 1665 spin_lock_init(&data->lock); 1666 idr_init(&data->ctx_idr); 1667 data->domain_id = domain_id; 1668 data->rpdev = rpdev; 1669 1670 return of_platform_populate(rdev->of_node, NULL, NULL, rdev); 1671} 1672 1673static void fastrpc_notify_users(struct fastrpc_user *user) 1674{ 1675 struct fastrpc_invoke_ctx *ctx; 1676 1677 spin_lock(&user->lock); 1678 list_for_each_entry(ctx, &user->pending, node) { 1679 ctx->retval = -EPIPE; 1680 complete(&ctx->work); 1681 } 1682 spin_unlock(&user->lock); 1683} 1684 1685static void fastrpc_rpmsg_remove(struct rpmsg_device *rpdev) 1686{ 1687 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); 1688 struct fastrpc_user *user; 1689 unsigned long flags; 1690 1691 /* No invocations past this point */ 1692 spin_lock_irqsave(&cctx->lock, flags); 1693 cctx->rpdev = NULL; 1694 list_for_each_entry(user, &cctx->users, user) 1695 fastrpc_notify_users(user); 1696 spin_unlock_irqrestore(&cctx->lock, flags); 1697 1698 misc_deregister(&cctx->miscdev); 1699 of_platform_depopulate(&rpdev->dev); 1700 1701 fastrpc_channel_ctx_put(cctx); 1702} 1703 1704static int fastrpc_rpmsg_callback(struct rpmsg_device *rpdev, void *data, 1705 int len, void *priv, u32 addr) 1706{ 1707 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); 1708 struct fastrpc_invoke_rsp *rsp = data; 1709 struct fastrpc_invoke_ctx *ctx; 1710 unsigned long flags; 1711 unsigned long ctxid; 1712 1713 if (len < sizeof(*rsp)) 1714 return -EINVAL; 1715 1716 ctxid = ((rsp->ctx & FASTRPC_CTXID_MASK) >> 4); 1717 1718 spin_lock_irqsave(&cctx->lock, flags); 1719 ctx = idr_find(&cctx->ctx_idr, ctxid); 1720 spin_unlock_irqrestore(&cctx->lock, flags); 1721 1722 if (!ctx) { 1723 dev_err(&rpdev->dev, "No context ID matches response\n"); 1724 return -ENOENT; 1725 } 1726 1727 ctx->retval = rsp->retval; 1728 complete(&ctx->work); 1729 1730 /* 1731 * The DMA buffer associated with the context cannot be freed in 1732 * interrupt context so schedule it through a worker thread to 1733 * avoid a kernel BUG. 1734 */ 1735 schedule_work(&ctx->put_work); 1736 1737 return 0; 1738} 1739 1740static const struct of_device_id fastrpc_rpmsg_of_match[] = { 1741 { .compatible = "qcom,fastrpc" }, 1742 { }, 1743}; 1744MODULE_DEVICE_TABLE(of, fastrpc_rpmsg_of_match); 1745 1746static struct rpmsg_driver fastrpc_driver = { 1747 .probe = fastrpc_rpmsg_probe, 1748 .remove = fastrpc_rpmsg_remove, 1749 .callback = fastrpc_rpmsg_callback, 1750 .drv = { 1751 .name = "qcom,fastrpc", 1752 .of_match_table = fastrpc_rpmsg_of_match, 1753 }, 1754}; 1755 1756static int fastrpc_init(void) 1757{ 1758 int ret; 1759 1760 ret = platform_driver_register(&fastrpc_cb_driver); 1761 if (ret < 0) { 1762 pr_err("fastrpc: failed to register cb driver\n"); 1763 return ret; 1764 } 1765 1766 ret = register_rpmsg_driver(&fastrpc_driver); 1767 if (ret < 0) { 1768 pr_err("fastrpc: failed to register rpmsg driver\n"); 1769 platform_driver_unregister(&fastrpc_cb_driver); 1770 return ret; 1771 } 1772 1773 return 0; 1774} 1775module_init(fastrpc_init); 1776 1777static void fastrpc_exit(void) 1778{ 1779 platform_driver_unregister(&fastrpc_cb_driver); 1780 unregister_rpmsg_driver(&fastrpc_driver); 1781} 1782module_exit(fastrpc_exit); 1783 1784MODULE_LICENSE("GPL v2"); 1785