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/dma-resv.h> 10 #include <linux/idr.h> 11 #include <linux/list.h> 12 #include <linux/miscdevice.h> 13 #include <linux/module.h> 14 #include <linux/of_address.h> 15 #include <linux/of.h> 16 #include <linux/sort.h> 17 #include <linux/of_platform.h> 18 #include <linux/rpmsg.h> 19 #include <linux/scatterlist.h> 20 #include <linux/slab.h> 21 #include <linux/qcom_scm.h> 22 #include <uapi/misc/fastrpc.h> 23 #include <linux/of_reserved_mem.h> 24 25 #define ADSP_DOMAIN_ID (0) 26 #define MDSP_DOMAIN_ID (1) 27 #define SDSP_DOMAIN_ID (2) 28 #define CDSP_DOMAIN_ID (3) 29 #define FASTRPC_DEV_MAX 4 /* adsp, mdsp, slpi, cdsp*/ 30 #define FASTRPC_MAX_SESSIONS 14 31 #define FASTRPC_MAX_VMIDS 16 32 #define FASTRPC_ALIGN 128 33 #define FASTRPC_MAX_FDLIST 16 34 #define FASTRPC_MAX_CRCLIST 64 35 #define FASTRPC_PHYS(p) ((p) & 0xffffffff) 36 #define FASTRPC_CTX_MAX (256) 37 #define FASTRPC_INIT_HANDLE 1 38 #define FASTRPC_DSP_UTILITIES_HANDLE 2 39 #define FASTRPC_CTXID_MASK (0xFF0) 40 #define INIT_FILELEN_MAX (2 * 1024 * 1024) 41 #define INIT_FILE_NAMELEN_MAX (128) 42 #define FASTRPC_DEVICE_NAME "fastrpc" 43 44 /* Add memory to static PD pool, protection thru XPU */ 45 #define ADSP_MMAP_HEAP_ADDR 4 46 /* MAP static DMA buffer on DSP User PD */ 47 #define ADSP_MMAP_DMA_BUFFER 6 48 /* Add memory to static PD pool protection thru hypervisor */ 49 #define ADSP_MMAP_REMOTE_HEAP_ADDR 8 50 /* Add memory to userPD pool, for user heap */ 51 #define ADSP_MMAP_ADD_PAGES 0x1000 52 /* Add memory to userPD pool, for LLC heap */ 53 #define ADSP_MMAP_ADD_PAGES_LLC 0x3000, 54 55 #define DSP_UNSUPPORTED_API (0x80000414) 56 /* MAX NUMBER of DSP ATTRIBUTES SUPPORTED */ 57 #define FASTRPC_MAX_DSP_ATTRIBUTES (256) 58 #define FASTRPC_MAX_DSP_ATTRIBUTES_LEN (sizeof(u32) * FASTRPC_MAX_DSP_ATTRIBUTES) 59 60 /* Retrives number of input buffers from the scalars parameter */ 61 #define REMOTE_SCALARS_INBUFS(sc) (((sc) >> 16) & 0x0ff) 62 63 /* Retrives number of output buffers from the scalars parameter */ 64 #define REMOTE_SCALARS_OUTBUFS(sc) (((sc) >> 8) & 0x0ff) 65 66 /* Retrives number of input handles from the scalars parameter */ 67 #define REMOTE_SCALARS_INHANDLES(sc) (((sc) >> 4) & 0x0f) 68 69 /* Retrives number of output handles from the scalars parameter */ 70 #define REMOTE_SCALARS_OUTHANDLES(sc) ((sc) & 0x0f) 71 72 #define REMOTE_SCALARS_LENGTH(sc) (REMOTE_SCALARS_INBUFS(sc) + \ 73 REMOTE_SCALARS_OUTBUFS(sc) + \ 74 REMOTE_SCALARS_INHANDLES(sc)+ \ 75 REMOTE_SCALARS_OUTHANDLES(sc)) 76 #define FASTRPC_BUILD_SCALARS(attr, method, in, out, oin, oout) \ 77 (((attr & 0x07) << 29) | \ 78 ((method & 0x1f) << 24) | \ 79 ((in & 0xff) << 16) | \ 80 ((out & 0xff) << 8) | \ 81 ((oin & 0x0f) << 4) | \ 82 (oout & 0x0f)) 83 84 #define FASTRPC_SCALARS(method, in, out) \ 85 FASTRPC_BUILD_SCALARS(0, method, in, out, 0, 0) 86 87 #define FASTRPC_CREATE_PROCESS_NARGS 6 88 #define FASTRPC_CREATE_STATIC_PROCESS_NARGS 3 89 /* Remote Method id table */ 90 #define FASTRPC_RMID_INIT_ATTACH 0 91 #define FASTRPC_RMID_INIT_RELEASE 1 92 #define FASTRPC_RMID_INIT_MMAP 4 93 #define FASTRPC_RMID_INIT_MUNMAP 5 94 #define FASTRPC_RMID_INIT_CREATE 6 95 #define FASTRPC_RMID_INIT_CREATE_ATTR 7 96 #define FASTRPC_RMID_INIT_CREATE_STATIC 8 97 #define FASTRPC_RMID_INIT_MEM_MAP 10 98 #define FASTRPC_RMID_INIT_MEM_UNMAP 11 99 100 /* Protection Domain(PD) ids */ 101 #define ROOT_PD (0) 102 #define USER_PD (1) 103 #define SENSORS_PD (2) 104 105 #define miscdev_to_fdevice(d) container_of(d, struct fastrpc_device, miscdev) 106 107 static const char *domains[FASTRPC_DEV_MAX] = { "adsp", "mdsp", 108 "sdsp", "cdsp"}; 109 struct fastrpc_phy_page { 110 u64 addr; /* physical address */ 111 u64 size; /* size of contiguous region */ 112 }; 113 114 struct fastrpc_invoke_buf { 115 u32 num; /* number of contiguous regions */ 116 u32 pgidx; /* index to start of contiguous region */ 117 }; 118 119 struct fastrpc_remote_dmahandle { 120 s32 fd; /* dma handle fd */ 121 u32 offset; /* dma handle offset */ 122 u32 len; /* dma handle length */ 123 }; 124 125 struct fastrpc_remote_buf { 126 u64 pv; /* buffer pointer */ 127 u64 len; /* length of buffer */ 128 }; 129 130 union fastrpc_remote_arg { 131 struct fastrpc_remote_buf buf; 132 struct fastrpc_remote_dmahandle dma; 133 }; 134 135 struct fastrpc_mmap_rsp_msg { 136 u64 vaddr; 137 }; 138 139 struct fastrpc_mmap_req_msg { 140 s32 pgid; 141 u32 flags; 142 u64 vaddr; 143 s32 num; 144 }; 145 146 struct fastrpc_mem_map_req_msg { 147 s32 pgid; 148 s32 fd; 149 s32 offset; 150 u32 flags; 151 u64 vaddrin; 152 s32 num; 153 s32 data_len; 154 }; 155 156 struct fastrpc_munmap_req_msg { 157 s32 pgid; 158 u64 vaddr; 159 u64 size; 160 }; 161 162 struct fastrpc_mem_unmap_req_msg { 163 s32 pgid; 164 s32 fd; 165 u64 vaddrin; 166 u64 len; 167 }; 168 169 struct fastrpc_msg { 170 int pid; /* process group id */ 171 int tid; /* thread id */ 172 u64 ctx; /* invoke caller context */ 173 u32 handle; /* handle to invoke */ 174 u32 sc; /* scalars structure describing the data */ 175 u64 addr; /* physical address */ 176 u64 size; /* size of contiguous region */ 177 }; 178 179 struct fastrpc_invoke_rsp { 180 u64 ctx; /* invoke caller context */ 181 int retval; /* invoke return value */ 182 }; 183 184 struct fastrpc_buf_overlap { 185 u64 start; 186 u64 end; 187 int raix; 188 u64 mstart; 189 u64 mend; 190 u64 offset; 191 }; 192 193 struct fastrpc_buf { 194 struct fastrpc_user *fl; 195 struct dma_buf *dmabuf; 196 struct device *dev; 197 void *virt; 198 u64 phys; 199 u64 size; 200 /* Lock for dma buf attachments */ 201 struct mutex lock; 202 struct list_head attachments; 203 /* mmap support */ 204 struct list_head node; /* list of user requested mmaps */ 205 uintptr_t raddr; 206 }; 207 208 struct fastrpc_dma_buf_attachment { 209 struct device *dev; 210 struct sg_table sgt; 211 struct list_head node; 212 }; 213 214 struct fastrpc_map { 215 struct list_head node; 216 struct fastrpc_user *fl; 217 int fd; 218 struct dma_buf *buf; 219 struct sg_table *table; 220 struct dma_buf_attachment *attach; 221 u64 phys; 222 u64 size; 223 void *va; 224 u64 len; 225 u64 raddr; 226 u32 attr; 227 struct kref refcount; 228 }; 229 230 struct fastrpc_invoke_ctx { 231 int nscalars; 232 int nbufs; 233 int retval; 234 int pid; 235 int tgid; 236 u32 sc; 237 u32 *crc; 238 u64 ctxid; 239 u64 msg_sz; 240 struct kref refcount; 241 struct list_head node; /* list of ctxs */ 242 struct completion work; 243 struct work_struct put_work; 244 struct fastrpc_msg msg; 245 struct fastrpc_user *fl; 246 union fastrpc_remote_arg *rpra; 247 struct fastrpc_map **maps; 248 struct fastrpc_buf *buf; 249 struct fastrpc_invoke_args *args; 250 struct fastrpc_buf_overlap *olaps; 251 struct fastrpc_channel_ctx *cctx; 252 }; 253 254 struct fastrpc_session_ctx { 255 struct device *dev; 256 int sid; 257 bool used; 258 bool valid; 259 }; 260 261 struct fastrpc_channel_ctx { 262 int domain_id; 263 int sesscount; 264 int vmcount; 265 u32 perms; 266 struct qcom_scm_vmperm vmperms[FASTRPC_MAX_VMIDS]; 267 struct rpmsg_device *rpdev; 268 struct fastrpc_session_ctx session[FASTRPC_MAX_SESSIONS]; 269 spinlock_t lock; 270 struct idr ctx_idr; 271 struct list_head users; 272 struct kref refcount; 273 /* Flag if dsp attributes are cached */ 274 bool valid_attributes; 275 u32 dsp_attributes[FASTRPC_MAX_DSP_ATTRIBUTES]; 276 struct fastrpc_device *secure_fdevice; 277 struct fastrpc_device *fdevice; 278 struct fastrpc_buf *remote_heap; 279 struct list_head invoke_interrupted_mmaps; 280 bool secure; 281 bool unsigned_support; 282 u64 dma_mask; 283 }; 284 285 struct fastrpc_device { 286 struct fastrpc_channel_ctx *cctx; 287 struct miscdevice miscdev; 288 bool secure; 289 }; 290 291 struct fastrpc_user { 292 struct list_head user; 293 struct list_head maps; 294 struct list_head pending; 295 struct list_head mmaps; 296 297 struct fastrpc_channel_ctx *cctx; 298 struct fastrpc_session_ctx *sctx; 299 struct fastrpc_buf *init_mem; 300 301 int tgid; 302 int pd; 303 bool is_secure_dev; 304 /* Lock for lists */ 305 spinlock_t lock; 306 /* lock for allocations */ 307 struct mutex mutex; 308 }; 309 310 static void fastrpc_free_map(struct kref *ref) 311 { 312 struct fastrpc_map *map; 313 314 map = container_of(ref, struct fastrpc_map, refcount); 315 316 if (map->table) { 317 if (map->attr & FASTRPC_ATTR_SECUREMAP) { 318 struct qcom_scm_vmperm perm; 319 int err = 0; 320 321 perm.vmid = QCOM_SCM_VMID_HLOS; 322 perm.perm = QCOM_SCM_PERM_RWX; 323 err = qcom_scm_assign_mem(map->phys, map->size, 324 &map->fl->cctx->perms, &perm, 1); 325 if (err) { 326 dev_err(map->fl->sctx->dev, "Failed to assign memory phys 0x%llx size 0x%llx err %d", 327 map->phys, map->size, err); 328 return; 329 } 330 } 331 dma_buf_unmap_attachment_unlocked(map->attach, map->table, 332 DMA_BIDIRECTIONAL); 333 dma_buf_detach(map->buf, map->attach); 334 dma_buf_put(map->buf); 335 } 336 337 if (map->fl) { 338 spin_lock(&map->fl->lock); 339 list_del(&map->node); 340 spin_unlock(&map->fl->lock); 341 map->fl = NULL; 342 } 343 344 kfree(map); 345 } 346 347 static void fastrpc_map_put(struct fastrpc_map *map) 348 { 349 if (map) 350 kref_put(&map->refcount, fastrpc_free_map); 351 } 352 353 static int fastrpc_map_get(struct fastrpc_map *map) 354 { 355 if (!map) 356 return -ENOENT; 357 358 return kref_get_unless_zero(&map->refcount) ? 0 : -ENOENT; 359 } 360 361 362 static int fastrpc_map_lookup(struct fastrpc_user *fl, int fd, 363 struct fastrpc_map **ppmap, bool take_ref) 364 { 365 struct fastrpc_session_ctx *sess = fl->sctx; 366 struct fastrpc_map *map = NULL; 367 int ret = -ENOENT; 368 369 spin_lock(&fl->lock); 370 list_for_each_entry(map, &fl->maps, node) { 371 if (map->fd != fd) 372 continue; 373 374 if (take_ref) { 375 ret = fastrpc_map_get(map); 376 if (ret) { 377 dev_dbg(sess->dev, "%s: Failed to get map fd=%d ret=%d\n", 378 __func__, fd, ret); 379 break; 380 } 381 } 382 383 *ppmap = map; 384 ret = 0; 385 break; 386 } 387 spin_unlock(&fl->lock); 388 389 return ret; 390 } 391 392 static void fastrpc_buf_free(struct fastrpc_buf *buf) 393 { 394 dma_free_coherent(buf->dev, buf->size, buf->virt, 395 FASTRPC_PHYS(buf->phys)); 396 kfree(buf); 397 } 398 399 static int __fastrpc_buf_alloc(struct fastrpc_user *fl, struct device *dev, 400 u64 size, struct fastrpc_buf **obuf) 401 { 402 struct fastrpc_buf *buf; 403 404 buf = kzalloc(sizeof(*buf), GFP_KERNEL); 405 if (!buf) 406 return -ENOMEM; 407 408 INIT_LIST_HEAD(&buf->attachments); 409 INIT_LIST_HEAD(&buf->node); 410 mutex_init(&buf->lock); 411 412 buf->fl = fl; 413 buf->virt = NULL; 414 buf->phys = 0; 415 buf->size = size; 416 buf->dev = dev; 417 buf->raddr = 0; 418 419 buf->virt = dma_alloc_coherent(dev, buf->size, (dma_addr_t *)&buf->phys, 420 GFP_KERNEL); 421 if (!buf->virt) { 422 mutex_destroy(&buf->lock); 423 kfree(buf); 424 return -ENOMEM; 425 } 426 427 *obuf = buf; 428 429 return 0; 430 } 431 432 static int fastrpc_buf_alloc(struct fastrpc_user *fl, struct device *dev, 433 u64 size, struct fastrpc_buf **obuf) 434 { 435 int ret; 436 struct fastrpc_buf *buf; 437 438 ret = __fastrpc_buf_alloc(fl, dev, size, obuf); 439 if (ret) 440 return ret; 441 442 buf = *obuf; 443 444 if (fl->sctx && fl->sctx->sid) 445 buf->phys += ((u64)fl->sctx->sid << 32); 446 447 return 0; 448 } 449 450 static int fastrpc_remote_heap_alloc(struct fastrpc_user *fl, struct device *dev, 451 u64 size, struct fastrpc_buf **obuf) 452 { 453 struct device *rdev = &fl->cctx->rpdev->dev; 454 455 return __fastrpc_buf_alloc(fl, rdev, size, obuf); 456 } 457 458 static void fastrpc_channel_ctx_free(struct kref *ref) 459 { 460 struct fastrpc_channel_ctx *cctx; 461 462 cctx = container_of(ref, struct fastrpc_channel_ctx, refcount); 463 464 kfree(cctx); 465 } 466 467 static void fastrpc_channel_ctx_get(struct fastrpc_channel_ctx *cctx) 468 { 469 kref_get(&cctx->refcount); 470 } 471 472 static void fastrpc_channel_ctx_put(struct fastrpc_channel_ctx *cctx) 473 { 474 kref_put(&cctx->refcount, fastrpc_channel_ctx_free); 475 } 476 477 static void fastrpc_context_free(struct kref *ref) 478 { 479 struct fastrpc_invoke_ctx *ctx; 480 struct fastrpc_channel_ctx *cctx; 481 unsigned long flags; 482 int i; 483 484 ctx = container_of(ref, struct fastrpc_invoke_ctx, refcount); 485 cctx = ctx->cctx; 486 487 for (i = 0; i < ctx->nbufs; i++) 488 fastrpc_map_put(ctx->maps[i]); 489 490 if (ctx->buf) 491 fastrpc_buf_free(ctx->buf); 492 493 spin_lock_irqsave(&cctx->lock, flags); 494 idr_remove(&cctx->ctx_idr, ctx->ctxid >> 4); 495 spin_unlock_irqrestore(&cctx->lock, flags); 496 497 kfree(ctx->maps); 498 kfree(ctx->olaps); 499 kfree(ctx); 500 501 fastrpc_channel_ctx_put(cctx); 502 } 503 504 static void fastrpc_context_get(struct fastrpc_invoke_ctx *ctx) 505 { 506 kref_get(&ctx->refcount); 507 } 508 509 static void fastrpc_context_put(struct fastrpc_invoke_ctx *ctx) 510 { 511 kref_put(&ctx->refcount, fastrpc_context_free); 512 } 513 514 static void fastrpc_context_put_wq(struct work_struct *work) 515 { 516 struct fastrpc_invoke_ctx *ctx = 517 container_of(work, struct fastrpc_invoke_ctx, put_work); 518 519 fastrpc_context_put(ctx); 520 } 521 522 #define CMP(aa, bb) ((aa) == (bb) ? 0 : (aa) < (bb) ? -1 : 1) 523 static int olaps_cmp(const void *a, const void *b) 524 { 525 struct fastrpc_buf_overlap *pa = (struct fastrpc_buf_overlap *)a; 526 struct fastrpc_buf_overlap *pb = (struct fastrpc_buf_overlap *)b; 527 /* sort with lowest starting buffer first */ 528 int st = CMP(pa->start, pb->start); 529 /* sort with highest ending buffer first */ 530 int ed = CMP(pb->end, pa->end); 531 532 return st == 0 ? ed : st; 533 } 534 535 static void fastrpc_get_buff_overlaps(struct fastrpc_invoke_ctx *ctx) 536 { 537 u64 max_end = 0; 538 int i; 539 540 for (i = 0; i < ctx->nbufs; ++i) { 541 ctx->olaps[i].start = ctx->args[i].ptr; 542 ctx->olaps[i].end = ctx->olaps[i].start + ctx->args[i].length; 543 ctx->olaps[i].raix = i; 544 } 545 546 sort(ctx->olaps, ctx->nbufs, sizeof(*ctx->olaps), olaps_cmp, NULL); 547 548 for (i = 0; i < ctx->nbufs; ++i) { 549 /* Falling inside previous range */ 550 if (ctx->olaps[i].start < max_end) { 551 ctx->olaps[i].mstart = max_end; 552 ctx->olaps[i].mend = ctx->olaps[i].end; 553 ctx->olaps[i].offset = max_end - ctx->olaps[i].start; 554 555 if (ctx->olaps[i].end > max_end) { 556 max_end = ctx->olaps[i].end; 557 } else { 558 ctx->olaps[i].mend = 0; 559 ctx->olaps[i].mstart = 0; 560 } 561 562 } else { 563 ctx->olaps[i].mend = ctx->olaps[i].end; 564 ctx->olaps[i].mstart = ctx->olaps[i].start; 565 ctx->olaps[i].offset = 0; 566 max_end = ctx->olaps[i].end; 567 } 568 } 569 } 570 571 static struct fastrpc_invoke_ctx *fastrpc_context_alloc( 572 struct fastrpc_user *user, u32 kernel, u32 sc, 573 struct fastrpc_invoke_args *args) 574 { 575 struct fastrpc_channel_ctx *cctx = user->cctx; 576 struct fastrpc_invoke_ctx *ctx = NULL; 577 unsigned long flags; 578 int ret; 579 580 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 581 if (!ctx) 582 return ERR_PTR(-ENOMEM); 583 584 INIT_LIST_HEAD(&ctx->node); 585 ctx->fl = user; 586 ctx->nscalars = REMOTE_SCALARS_LENGTH(sc); 587 ctx->nbufs = REMOTE_SCALARS_INBUFS(sc) + 588 REMOTE_SCALARS_OUTBUFS(sc); 589 590 if (ctx->nscalars) { 591 ctx->maps = kcalloc(ctx->nscalars, 592 sizeof(*ctx->maps), GFP_KERNEL); 593 if (!ctx->maps) { 594 kfree(ctx); 595 return ERR_PTR(-ENOMEM); 596 } 597 ctx->olaps = kcalloc(ctx->nscalars, 598 sizeof(*ctx->olaps), GFP_KERNEL); 599 if (!ctx->olaps) { 600 kfree(ctx->maps); 601 kfree(ctx); 602 return ERR_PTR(-ENOMEM); 603 } 604 ctx->args = args; 605 fastrpc_get_buff_overlaps(ctx); 606 } 607 608 /* Released in fastrpc_context_put() */ 609 fastrpc_channel_ctx_get(cctx); 610 611 ctx->sc = sc; 612 ctx->retval = -1; 613 ctx->pid = current->pid; 614 ctx->tgid = user->tgid; 615 ctx->cctx = cctx; 616 init_completion(&ctx->work); 617 INIT_WORK(&ctx->put_work, fastrpc_context_put_wq); 618 619 spin_lock(&user->lock); 620 list_add_tail(&ctx->node, &user->pending); 621 spin_unlock(&user->lock); 622 623 spin_lock_irqsave(&cctx->lock, flags); 624 ret = idr_alloc_cyclic(&cctx->ctx_idr, ctx, 1, 625 FASTRPC_CTX_MAX, GFP_ATOMIC); 626 if (ret < 0) { 627 spin_unlock_irqrestore(&cctx->lock, flags); 628 goto err_idr; 629 } 630 ctx->ctxid = ret << 4; 631 spin_unlock_irqrestore(&cctx->lock, flags); 632 633 kref_init(&ctx->refcount); 634 635 return ctx; 636 err_idr: 637 spin_lock(&user->lock); 638 list_del(&ctx->node); 639 spin_unlock(&user->lock); 640 fastrpc_channel_ctx_put(cctx); 641 kfree(ctx->maps); 642 kfree(ctx->olaps); 643 kfree(ctx); 644 645 return ERR_PTR(ret); 646 } 647 648 static struct sg_table * 649 fastrpc_map_dma_buf(struct dma_buf_attachment *attachment, 650 enum dma_data_direction dir) 651 { 652 struct fastrpc_dma_buf_attachment *a = attachment->priv; 653 struct sg_table *table; 654 int ret; 655 656 table = &a->sgt; 657 658 ret = dma_map_sgtable(attachment->dev, table, dir, 0); 659 if (ret) 660 table = ERR_PTR(ret); 661 return table; 662 } 663 664 static void fastrpc_unmap_dma_buf(struct dma_buf_attachment *attach, 665 struct sg_table *table, 666 enum dma_data_direction dir) 667 { 668 dma_unmap_sgtable(attach->dev, table, dir, 0); 669 } 670 671 static void fastrpc_release(struct dma_buf *dmabuf) 672 { 673 struct fastrpc_buf *buffer = dmabuf->priv; 674 675 fastrpc_buf_free(buffer); 676 } 677 678 static int fastrpc_dma_buf_attach(struct dma_buf *dmabuf, 679 struct dma_buf_attachment *attachment) 680 { 681 struct fastrpc_dma_buf_attachment *a; 682 struct fastrpc_buf *buffer = dmabuf->priv; 683 int ret; 684 685 a = kzalloc(sizeof(*a), GFP_KERNEL); 686 if (!a) 687 return -ENOMEM; 688 689 ret = dma_get_sgtable(buffer->dev, &a->sgt, buffer->virt, 690 FASTRPC_PHYS(buffer->phys), buffer->size); 691 if (ret < 0) { 692 dev_err(buffer->dev, "failed to get scatterlist from DMA API\n"); 693 kfree(a); 694 return -EINVAL; 695 } 696 697 a->dev = attachment->dev; 698 INIT_LIST_HEAD(&a->node); 699 attachment->priv = a; 700 701 mutex_lock(&buffer->lock); 702 list_add(&a->node, &buffer->attachments); 703 mutex_unlock(&buffer->lock); 704 705 return 0; 706 } 707 708 static void fastrpc_dma_buf_detatch(struct dma_buf *dmabuf, 709 struct dma_buf_attachment *attachment) 710 { 711 struct fastrpc_dma_buf_attachment *a = attachment->priv; 712 struct fastrpc_buf *buffer = dmabuf->priv; 713 714 mutex_lock(&buffer->lock); 715 list_del(&a->node); 716 mutex_unlock(&buffer->lock); 717 sg_free_table(&a->sgt); 718 kfree(a); 719 } 720 721 static int fastrpc_vmap(struct dma_buf *dmabuf, struct iosys_map *map) 722 { 723 struct fastrpc_buf *buf = dmabuf->priv; 724 725 iosys_map_set_vaddr(map, buf->virt); 726 727 return 0; 728 } 729 730 static int fastrpc_mmap(struct dma_buf *dmabuf, 731 struct vm_area_struct *vma) 732 { 733 struct fastrpc_buf *buf = dmabuf->priv; 734 size_t size = vma->vm_end - vma->vm_start; 735 736 dma_resv_assert_held(dmabuf->resv); 737 738 return dma_mmap_coherent(buf->dev, vma, buf->virt, 739 FASTRPC_PHYS(buf->phys), size); 740 } 741 742 static const struct dma_buf_ops fastrpc_dma_buf_ops = { 743 .attach = fastrpc_dma_buf_attach, 744 .detach = fastrpc_dma_buf_detatch, 745 .map_dma_buf = fastrpc_map_dma_buf, 746 .unmap_dma_buf = fastrpc_unmap_dma_buf, 747 .mmap = fastrpc_mmap, 748 .vmap = fastrpc_vmap, 749 .release = fastrpc_release, 750 }; 751 752 static int fastrpc_map_create(struct fastrpc_user *fl, int fd, 753 u64 len, u32 attr, struct fastrpc_map **ppmap) 754 { 755 struct fastrpc_session_ctx *sess = fl->sctx; 756 struct fastrpc_map *map = NULL; 757 int err = 0; 758 759 if (!fastrpc_map_lookup(fl, fd, ppmap, true)) 760 return 0; 761 762 map = kzalloc(sizeof(*map), GFP_KERNEL); 763 if (!map) 764 return -ENOMEM; 765 766 INIT_LIST_HEAD(&map->node); 767 kref_init(&map->refcount); 768 769 map->fl = fl; 770 map->fd = fd; 771 map->buf = dma_buf_get(fd); 772 if (IS_ERR(map->buf)) { 773 err = PTR_ERR(map->buf); 774 goto get_err; 775 } 776 777 map->attach = dma_buf_attach(map->buf, sess->dev); 778 if (IS_ERR(map->attach)) { 779 dev_err(sess->dev, "Failed to attach dmabuf\n"); 780 err = PTR_ERR(map->attach); 781 goto attach_err; 782 } 783 784 map->table = dma_buf_map_attachment_unlocked(map->attach, DMA_BIDIRECTIONAL); 785 if (IS_ERR(map->table)) { 786 err = PTR_ERR(map->table); 787 goto map_err; 788 } 789 790 map->phys = sg_dma_address(map->table->sgl); 791 map->phys += ((u64)fl->sctx->sid << 32); 792 map->size = len; 793 map->va = sg_virt(map->table->sgl); 794 map->len = len; 795 796 if (attr & FASTRPC_ATTR_SECUREMAP) { 797 /* 798 * If subsystem VMIDs are defined in DTSI, then do 799 * hyp_assign from HLOS to those VM(s) 800 */ 801 map->attr = attr; 802 err = qcom_scm_assign_mem(map->phys, (u64)map->size, &fl->cctx->perms, 803 fl->cctx->vmperms, fl->cctx->vmcount); 804 if (err) { 805 dev_err(sess->dev, "Failed to assign memory with phys 0x%llx size 0x%llx err %d", 806 map->phys, map->size, err); 807 goto map_err; 808 } 809 } 810 spin_lock(&fl->lock); 811 list_add_tail(&map->node, &fl->maps); 812 spin_unlock(&fl->lock); 813 *ppmap = map; 814 815 return 0; 816 817 map_err: 818 dma_buf_detach(map->buf, map->attach); 819 attach_err: 820 dma_buf_put(map->buf); 821 get_err: 822 fastrpc_map_put(map); 823 824 return err; 825 } 826 827 /* 828 * Fastrpc payload buffer with metadata looks like: 829 * 830 * >>>>>> START of METADATA <<<<<<<<< 831 * +---------------------------------+ 832 * | Arguments | 833 * | type:(union fastrpc_remote_arg)| 834 * | (0 - N) | 835 * +---------------------------------+ 836 * | Invoke Buffer list | 837 * | type:(struct fastrpc_invoke_buf)| 838 * | (0 - N) | 839 * +---------------------------------+ 840 * | Page info list | 841 * | type:(struct fastrpc_phy_page) | 842 * | (0 - N) | 843 * +---------------------------------+ 844 * | Optional info | 845 * |(can be specific to SoC/Firmware)| 846 * +---------------------------------+ 847 * >>>>>>>> END of METADATA <<<<<<<<< 848 * +---------------------------------+ 849 * | Inline ARGS | 850 * | (0-N) | 851 * +---------------------------------+ 852 */ 853 854 static int fastrpc_get_meta_size(struct fastrpc_invoke_ctx *ctx) 855 { 856 int size = 0; 857 858 size = (sizeof(struct fastrpc_remote_buf) + 859 sizeof(struct fastrpc_invoke_buf) + 860 sizeof(struct fastrpc_phy_page)) * ctx->nscalars + 861 sizeof(u64) * FASTRPC_MAX_FDLIST + 862 sizeof(u32) * FASTRPC_MAX_CRCLIST; 863 864 return size; 865 } 866 867 static u64 fastrpc_get_payload_size(struct fastrpc_invoke_ctx *ctx, int metalen) 868 { 869 u64 size = 0; 870 int oix; 871 872 size = ALIGN(metalen, FASTRPC_ALIGN); 873 for (oix = 0; oix < ctx->nbufs; oix++) { 874 int i = ctx->olaps[oix].raix; 875 876 if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1) { 877 878 if (ctx->olaps[oix].offset == 0) 879 size = ALIGN(size, FASTRPC_ALIGN); 880 881 size += (ctx->olaps[oix].mend - ctx->olaps[oix].mstart); 882 } 883 } 884 885 return size; 886 } 887 888 static int fastrpc_create_maps(struct fastrpc_invoke_ctx *ctx) 889 { 890 struct device *dev = ctx->fl->sctx->dev; 891 int i, err; 892 893 for (i = 0; i < ctx->nscalars; ++i) { 894 895 if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1 || 896 ctx->args[i].length == 0) 897 continue; 898 899 err = fastrpc_map_create(ctx->fl, ctx->args[i].fd, 900 ctx->args[i].length, ctx->args[i].attr, &ctx->maps[i]); 901 if (err) { 902 dev_err(dev, "Error Creating map %d\n", err); 903 return -EINVAL; 904 } 905 906 } 907 return 0; 908 } 909 910 static struct fastrpc_invoke_buf *fastrpc_invoke_buf_start(union fastrpc_remote_arg *pra, int len) 911 { 912 return (struct fastrpc_invoke_buf *)(&pra[len]); 913 } 914 915 static struct fastrpc_phy_page *fastrpc_phy_page_start(struct fastrpc_invoke_buf *buf, int len) 916 { 917 return (struct fastrpc_phy_page *)(&buf[len]); 918 } 919 920 static int fastrpc_get_args(u32 kernel, struct fastrpc_invoke_ctx *ctx) 921 { 922 struct device *dev = ctx->fl->sctx->dev; 923 union fastrpc_remote_arg *rpra; 924 struct fastrpc_invoke_buf *list; 925 struct fastrpc_phy_page *pages; 926 int inbufs, i, oix, err = 0; 927 u64 len, rlen, pkt_size; 928 u64 pg_start, pg_end; 929 uintptr_t args; 930 int metalen; 931 932 inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); 933 metalen = fastrpc_get_meta_size(ctx); 934 pkt_size = fastrpc_get_payload_size(ctx, metalen); 935 936 err = fastrpc_create_maps(ctx); 937 if (err) 938 return err; 939 940 ctx->msg_sz = pkt_size; 941 942 err = fastrpc_buf_alloc(ctx->fl, dev, pkt_size, &ctx->buf); 943 if (err) 944 return err; 945 946 rpra = ctx->buf->virt; 947 list = fastrpc_invoke_buf_start(rpra, ctx->nscalars); 948 pages = fastrpc_phy_page_start(list, ctx->nscalars); 949 args = (uintptr_t)ctx->buf->virt + metalen; 950 rlen = pkt_size - metalen; 951 ctx->rpra = rpra; 952 953 for (oix = 0; oix < ctx->nbufs; ++oix) { 954 int mlen; 955 956 i = ctx->olaps[oix].raix; 957 len = ctx->args[i].length; 958 959 rpra[i].buf.pv = 0; 960 rpra[i].buf.len = len; 961 list[i].num = len ? 1 : 0; 962 list[i].pgidx = i; 963 964 if (!len) 965 continue; 966 967 if (ctx->maps[i]) { 968 struct vm_area_struct *vma = NULL; 969 970 rpra[i].buf.pv = (u64) ctx->args[i].ptr; 971 pages[i].addr = ctx->maps[i]->phys; 972 973 mmap_read_lock(current->mm); 974 vma = find_vma(current->mm, ctx->args[i].ptr); 975 if (vma) 976 pages[i].addr += ctx->args[i].ptr - 977 vma->vm_start; 978 mmap_read_unlock(current->mm); 979 980 pg_start = (ctx->args[i].ptr & PAGE_MASK) >> PAGE_SHIFT; 981 pg_end = ((ctx->args[i].ptr + len - 1) & PAGE_MASK) >> 982 PAGE_SHIFT; 983 pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; 984 985 } else { 986 987 if (ctx->olaps[oix].offset == 0) { 988 rlen -= ALIGN(args, FASTRPC_ALIGN) - args; 989 args = ALIGN(args, FASTRPC_ALIGN); 990 } 991 992 mlen = ctx->olaps[oix].mend - ctx->olaps[oix].mstart; 993 994 if (rlen < mlen) 995 goto bail; 996 997 rpra[i].buf.pv = args - ctx->olaps[oix].offset; 998 pages[i].addr = ctx->buf->phys - 999 ctx->olaps[oix].offset + 1000 (pkt_size - rlen); 1001 pages[i].addr = pages[i].addr & PAGE_MASK; 1002 1003 pg_start = (args & PAGE_MASK) >> PAGE_SHIFT; 1004 pg_end = ((args + len - 1) & PAGE_MASK) >> PAGE_SHIFT; 1005 pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; 1006 args = args + mlen; 1007 rlen -= mlen; 1008 } 1009 1010 if (i < inbufs && !ctx->maps[i]) { 1011 void *dst = (void *)(uintptr_t)rpra[i].buf.pv; 1012 void *src = (void *)(uintptr_t)ctx->args[i].ptr; 1013 1014 if (!kernel) { 1015 if (copy_from_user(dst, (void __user *)src, 1016 len)) { 1017 err = -EFAULT; 1018 goto bail; 1019 } 1020 } else { 1021 memcpy(dst, src, len); 1022 } 1023 } 1024 } 1025 1026 for (i = ctx->nbufs; i < ctx->nscalars; ++i) { 1027 list[i].num = ctx->args[i].length ? 1 : 0; 1028 list[i].pgidx = i; 1029 if (ctx->maps[i]) { 1030 pages[i].addr = ctx->maps[i]->phys; 1031 pages[i].size = ctx->maps[i]->size; 1032 } 1033 rpra[i].dma.fd = ctx->args[i].fd; 1034 rpra[i].dma.len = ctx->args[i].length; 1035 rpra[i].dma.offset = (u64) ctx->args[i].ptr; 1036 } 1037 1038 bail: 1039 if (err) 1040 dev_err(dev, "Error: get invoke args failed:%d\n", err); 1041 1042 return err; 1043 } 1044 1045 static int fastrpc_put_args(struct fastrpc_invoke_ctx *ctx, 1046 u32 kernel) 1047 { 1048 union fastrpc_remote_arg *rpra = ctx->rpra; 1049 struct fastrpc_user *fl = ctx->fl; 1050 struct fastrpc_map *mmap = NULL; 1051 struct fastrpc_invoke_buf *list; 1052 struct fastrpc_phy_page *pages; 1053 u64 *fdlist; 1054 int i, inbufs, outbufs, handles; 1055 1056 inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); 1057 outbufs = REMOTE_SCALARS_OUTBUFS(ctx->sc); 1058 handles = REMOTE_SCALARS_INHANDLES(ctx->sc) + REMOTE_SCALARS_OUTHANDLES(ctx->sc); 1059 list = fastrpc_invoke_buf_start(rpra, ctx->nscalars); 1060 pages = fastrpc_phy_page_start(list, ctx->nscalars); 1061 fdlist = (uint64_t *)(pages + inbufs + outbufs + handles); 1062 1063 for (i = inbufs; i < ctx->nbufs; ++i) { 1064 if (!ctx->maps[i]) { 1065 void *src = (void *)(uintptr_t)rpra[i].buf.pv; 1066 void *dst = (void *)(uintptr_t)ctx->args[i].ptr; 1067 u64 len = rpra[i].buf.len; 1068 1069 if (!kernel) { 1070 if (copy_to_user((void __user *)dst, src, len)) 1071 return -EFAULT; 1072 } else { 1073 memcpy(dst, src, len); 1074 } 1075 } 1076 } 1077 1078 for (i = 0; i < FASTRPC_MAX_FDLIST; i++) { 1079 if (!fdlist[i]) 1080 break; 1081 if (!fastrpc_map_lookup(fl, (int)fdlist[i], &mmap, false)) 1082 fastrpc_map_put(mmap); 1083 } 1084 1085 return 0; 1086 } 1087 1088 static int fastrpc_invoke_send(struct fastrpc_session_ctx *sctx, 1089 struct fastrpc_invoke_ctx *ctx, 1090 u32 kernel, uint32_t handle) 1091 { 1092 struct fastrpc_channel_ctx *cctx; 1093 struct fastrpc_user *fl = ctx->fl; 1094 struct fastrpc_msg *msg = &ctx->msg; 1095 int ret; 1096 1097 cctx = fl->cctx; 1098 msg->pid = fl->tgid; 1099 msg->tid = current->pid; 1100 1101 if (kernel) 1102 msg->pid = 0; 1103 1104 msg->ctx = ctx->ctxid | fl->pd; 1105 msg->handle = handle; 1106 msg->sc = ctx->sc; 1107 msg->addr = ctx->buf ? ctx->buf->phys : 0; 1108 msg->size = roundup(ctx->msg_sz, PAGE_SIZE); 1109 fastrpc_context_get(ctx); 1110 1111 ret = rpmsg_send(cctx->rpdev->ept, (void *)msg, sizeof(*msg)); 1112 1113 if (ret) 1114 fastrpc_context_put(ctx); 1115 1116 return ret; 1117 1118 } 1119 1120 static int fastrpc_internal_invoke(struct fastrpc_user *fl, u32 kernel, 1121 u32 handle, u32 sc, 1122 struct fastrpc_invoke_args *args) 1123 { 1124 struct fastrpc_invoke_ctx *ctx = NULL; 1125 struct fastrpc_buf *buf, *b; 1126 1127 int err = 0; 1128 1129 if (!fl->sctx) 1130 return -EINVAL; 1131 1132 if (!fl->cctx->rpdev) 1133 return -EPIPE; 1134 1135 if (handle == FASTRPC_INIT_HANDLE && !kernel) { 1136 dev_warn_ratelimited(fl->sctx->dev, "user app trying to send a kernel RPC message (%d)\n", handle); 1137 return -EPERM; 1138 } 1139 1140 ctx = fastrpc_context_alloc(fl, kernel, sc, args); 1141 if (IS_ERR(ctx)) 1142 return PTR_ERR(ctx); 1143 1144 if (ctx->nscalars) { 1145 err = fastrpc_get_args(kernel, ctx); 1146 if (err) 1147 goto bail; 1148 } 1149 1150 /* make sure that all CPU memory writes are seen by DSP */ 1151 dma_wmb(); 1152 /* Send invoke buffer to remote dsp */ 1153 err = fastrpc_invoke_send(fl->sctx, ctx, kernel, handle); 1154 if (err) 1155 goto bail; 1156 1157 if (kernel) { 1158 if (!wait_for_completion_timeout(&ctx->work, 10 * HZ)) 1159 err = -ETIMEDOUT; 1160 } else { 1161 err = wait_for_completion_interruptible(&ctx->work); 1162 } 1163 1164 if (err) 1165 goto bail; 1166 1167 /* Check the response from remote dsp */ 1168 err = ctx->retval; 1169 if (err) 1170 goto bail; 1171 1172 if (ctx->nscalars) { 1173 /* make sure that all memory writes by DSP are seen by CPU */ 1174 dma_rmb(); 1175 /* populate all the output buffers with results */ 1176 err = fastrpc_put_args(ctx, kernel); 1177 if (err) 1178 goto bail; 1179 } 1180 1181 bail: 1182 if (err != -ERESTARTSYS && err != -ETIMEDOUT) { 1183 /* We are done with this compute context */ 1184 spin_lock(&fl->lock); 1185 list_del(&ctx->node); 1186 spin_unlock(&fl->lock); 1187 fastrpc_context_put(ctx); 1188 } 1189 1190 if (err == -ERESTARTSYS) { 1191 list_for_each_entry_safe(buf, b, &fl->mmaps, node) { 1192 list_del(&buf->node); 1193 list_add_tail(&buf->node, &fl->cctx->invoke_interrupted_mmaps); 1194 } 1195 } 1196 1197 if (err) 1198 dev_dbg(fl->sctx->dev, "Error: Invoke Failed %d\n", err); 1199 1200 return err; 1201 } 1202 1203 static bool is_session_rejected(struct fastrpc_user *fl, bool unsigned_pd_request) 1204 { 1205 /* Check if the device node is non-secure and channel is secure*/ 1206 if (!fl->is_secure_dev && fl->cctx->secure) { 1207 /* 1208 * Allow untrusted applications to offload only to Unsigned PD when 1209 * channel is configured as secure and block untrusted apps on channel 1210 * that does not support unsigned PD offload 1211 */ 1212 if (!fl->cctx->unsigned_support || !unsigned_pd_request) { 1213 dev_err(&fl->cctx->rpdev->dev, "Error: Untrusted application trying to offload to signed PD"); 1214 return true; 1215 } 1216 } 1217 1218 return false; 1219 } 1220 1221 static int fastrpc_init_create_static_process(struct fastrpc_user *fl, 1222 char __user *argp) 1223 { 1224 struct fastrpc_init_create_static init; 1225 struct fastrpc_invoke_args *args; 1226 struct fastrpc_phy_page pages[1]; 1227 char *name; 1228 int err; 1229 struct { 1230 int pgid; 1231 u32 namelen; 1232 u32 pageslen; 1233 } inbuf; 1234 u32 sc; 1235 1236 args = kcalloc(FASTRPC_CREATE_STATIC_PROCESS_NARGS, sizeof(*args), GFP_KERNEL); 1237 if (!args) 1238 return -ENOMEM; 1239 1240 if (copy_from_user(&init, argp, sizeof(init))) { 1241 err = -EFAULT; 1242 goto err; 1243 } 1244 1245 if (init.namelen > INIT_FILE_NAMELEN_MAX) { 1246 err = -EINVAL; 1247 goto err; 1248 } 1249 1250 name = kzalloc(init.namelen, GFP_KERNEL); 1251 if (!name) { 1252 err = -ENOMEM; 1253 goto err; 1254 } 1255 1256 if (copy_from_user(name, (void __user *)(uintptr_t)init.name, init.namelen)) { 1257 err = -EFAULT; 1258 goto err_name; 1259 } 1260 1261 if (!fl->cctx->remote_heap) { 1262 err = fastrpc_remote_heap_alloc(fl, fl->sctx->dev, init.memlen, 1263 &fl->cctx->remote_heap); 1264 if (err) 1265 goto err_name; 1266 1267 /* Map if we have any heap VMIDs associated with this ADSP Static Process. */ 1268 if (fl->cctx->vmcount) { 1269 err = qcom_scm_assign_mem(fl->cctx->remote_heap->phys, 1270 (u64)fl->cctx->remote_heap->size, 1271 &fl->cctx->perms, 1272 fl->cctx->vmperms, fl->cctx->vmcount); 1273 if (err) { 1274 dev_err(fl->sctx->dev, "Failed to assign memory with phys 0x%llx size 0x%llx err %d", 1275 fl->cctx->remote_heap->phys, fl->cctx->remote_heap->size, err); 1276 goto err_map; 1277 } 1278 } 1279 } 1280 1281 inbuf.pgid = fl->tgid; 1282 inbuf.namelen = init.namelen; 1283 inbuf.pageslen = 0; 1284 fl->pd = USER_PD; 1285 1286 args[0].ptr = (u64)(uintptr_t)&inbuf; 1287 args[0].length = sizeof(inbuf); 1288 args[0].fd = -1; 1289 1290 args[1].ptr = (u64)(uintptr_t)name; 1291 args[1].length = inbuf.namelen; 1292 args[1].fd = -1; 1293 1294 pages[0].addr = fl->cctx->remote_heap->phys; 1295 pages[0].size = fl->cctx->remote_heap->size; 1296 1297 args[2].ptr = (u64)(uintptr_t) pages; 1298 args[2].length = sizeof(*pages); 1299 args[2].fd = -1; 1300 1301 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE_STATIC, 3, 0); 1302 1303 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1304 sc, args); 1305 if (err) 1306 goto err_invoke; 1307 1308 kfree(args); 1309 1310 return 0; 1311 err_invoke: 1312 if (fl->cctx->vmcount) { 1313 struct qcom_scm_vmperm perm; 1314 1315 perm.vmid = QCOM_SCM_VMID_HLOS; 1316 perm.perm = QCOM_SCM_PERM_RWX; 1317 err = qcom_scm_assign_mem(fl->cctx->remote_heap->phys, 1318 (u64)fl->cctx->remote_heap->size, 1319 &fl->cctx->perms, &perm, 1); 1320 if (err) 1321 dev_err(fl->sctx->dev, "Failed to assign memory phys 0x%llx size 0x%llx err %d", 1322 fl->cctx->remote_heap->phys, fl->cctx->remote_heap->size, err); 1323 } 1324 err_map: 1325 fastrpc_buf_free(fl->cctx->remote_heap); 1326 err_name: 1327 kfree(name); 1328 err: 1329 kfree(args); 1330 1331 return err; 1332 } 1333 1334 static int fastrpc_init_create_process(struct fastrpc_user *fl, 1335 char __user *argp) 1336 { 1337 struct fastrpc_init_create init; 1338 struct fastrpc_invoke_args *args; 1339 struct fastrpc_phy_page pages[1]; 1340 struct fastrpc_map *map = NULL; 1341 struct fastrpc_buf *imem = NULL; 1342 int memlen; 1343 int err; 1344 struct { 1345 int pgid; 1346 u32 namelen; 1347 u32 filelen; 1348 u32 pageslen; 1349 u32 attrs; 1350 u32 siglen; 1351 } inbuf; 1352 u32 sc; 1353 bool unsigned_module = false; 1354 1355 args = kcalloc(FASTRPC_CREATE_PROCESS_NARGS, sizeof(*args), GFP_KERNEL); 1356 if (!args) 1357 return -ENOMEM; 1358 1359 if (copy_from_user(&init, argp, sizeof(init))) { 1360 err = -EFAULT; 1361 goto err; 1362 } 1363 1364 if (init.attrs & FASTRPC_MODE_UNSIGNED_MODULE) 1365 unsigned_module = true; 1366 1367 if (is_session_rejected(fl, unsigned_module)) { 1368 err = -ECONNREFUSED; 1369 goto err; 1370 } 1371 1372 if (init.filelen > INIT_FILELEN_MAX) { 1373 err = -EINVAL; 1374 goto err; 1375 } 1376 1377 inbuf.pgid = fl->tgid; 1378 inbuf.namelen = strlen(current->comm) + 1; 1379 inbuf.filelen = init.filelen; 1380 inbuf.pageslen = 1; 1381 inbuf.attrs = init.attrs; 1382 inbuf.siglen = init.siglen; 1383 fl->pd = USER_PD; 1384 1385 if (init.filelen && init.filefd) { 1386 err = fastrpc_map_create(fl, init.filefd, init.filelen, 0, &map); 1387 if (err) 1388 goto err; 1389 } 1390 1391 memlen = ALIGN(max(INIT_FILELEN_MAX, (int)init.filelen * 4), 1392 1024 * 1024); 1393 err = fastrpc_buf_alloc(fl, fl->sctx->dev, memlen, 1394 &imem); 1395 if (err) 1396 goto err_alloc; 1397 1398 fl->init_mem = imem; 1399 args[0].ptr = (u64)(uintptr_t)&inbuf; 1400 args[0].length = sizeof(inbuf); 1401 args[0].fd = -1; 1402 1403 args[1].ptr = (u64)(uintptr_t)current->comm; 1404 args[1].length = inbuf.namelen; 1405 args[1].fd = -1; 1406 1407 args[2].ptr = (u64) init.file; 1408 args[2].length = inbuf.filelen; 1409 args[2].fd = init.filefd; 1410 1411 pages[0].addr = imem->phys; 1412 pages[0].size = imem->size; 1413 1414 args[3].ptr = (u64)(uintptr_t) pages; 1415 args[3].length = 1 * sizeof(*pages); 1416 args[3].fd = -1; 1417 1418 args[4].ptr = (u64)(uintptr_t)&inbuf.attrs; 1419 args[4].length = sizeof(inbuf.attrs); 1420 args[4].fd = -1; 1421 1422 args[5].ptr = (u64)(uintptr_t) &inbuf.siglen; 1423 args[5].length = sizeof(inbuf.siglen); 1424 args[5].fd = -1; 1425 1426 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE, 4, 0); 1427 if (init.attrs) 1428 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE_ATTR, 6, 0); 1429 1430 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1431 sc, args); 1432 if (err) 1433 goto err_invoke; 1434 1435 kfree(args); 1436 1437 return 0; 1438 1439 err_invoke: 1440 fl->init_mem = NULL; 1441 fastrpc_buf_free(imem); 1442 err_alloc: 1443 fastrpc_map_put(map); 1444 err: 1445 kfree(args); 1446 1447 return err; 1448 } 1449 1450 static struct fastrpc_session_ctx *fastrpc_session_alloc( 1451 struct fastrpc_channel_ctx *cctx) 1452 { 1453 struct fastrpc_session_ctx *session = NULL; 1454 unsigned long flags; 1455 int i; 1456 1457 spin_lock_irqsave(&cctx->lock, flags); 1458 for (i = 0; i < cctx->sesscount; i++) { 1459 if (!cctx->session[i].used && cctx->session[i].valid) { 1460 cctx->session[i].used = true; 1461 session = &cctx->session[i]; 1462 break; 1463 } 1464 } 1465 spin_unlock_irqrestore(&cctx->lock, flags); 1466 1467 return session; 1468 } 1469 1470 static void fastrpc_session_free(struct fastrpc_channel_ctx *cctx, 1471 struct fastrpc_session_ctx *session) 1472 { 1473 unsigned long flags; 1474 1475 spin_lock_irqsave(&cctx->lock, flags); 1476 session->used = false; 1477 spin_unlock_irqrestore(&cctx->lock, flags); 1478 } 1479 1480 static int fastrpc_release_current_dsp_process(struct fastrpc_user *fl) 1481 { 1482 struct fastrpc_invoke_args args[1]; 1483 int tgid = 0; 1484 u32 sc; 1485 1486 tgid = fl->tgid; 1487 args[0].ptr = (u64)(uintptr_t) &tgid; 1488 args[0].length = sizeof(tgid); 1489 args[0].fd = -1; 1490 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_RELEASE, 1, 0); 1491 1492 return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1493 sc, &args[0]); 1494 } 1495 1496 static int fastrpc_device_release(struct inode *inode, struct file *file) 1497 { 1498 struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; 1499 struct fastrpc_channel_ctx *cctx = fl->cctx; 1500 struct fastrpc_invoke_ctx *ctx, *n; 1501 struct fastrpc_map *map, *m; 1502 struct fastrpc_buf *buf, *b; 1503 unsigned long flags; 1504 1505 fastrpc_release_current_dsp_process(fl); 1506 1507 spin_lock_irqsave(&cctx->lock, flags); 1508 list_del(&fl->user); 1509 spin_unlock_irqrestore(&cctx->lock, flags); 1510 1511 if (fl->init_mem) 1512 fastrpc_buf_free(fl->init_mem); 1513 1514 list_for_each_entry_safe(ctx, n, &fl->pending, node) { 1515 list_del(&ctx->node); 1516 fastrpc_context_put(ctx); 1517 } 1518 1519 list_for_each_entry_safe(map, m, &fl->maps, node) 1520 fastrpc_map_put(map); 1521 1522 list_for_each_entry_safe(buf, b, &fl->mmaps, node) { 1523 list_del(&buf->node); 1524 fastrpc_buf_free(buf); 1525 } 1526 1527 fastrpc_session_free(cctx, fl->sctx); 1528 fastrpc_channel_ctx_put(cctx); 1529 1530 mutex_destroy(&fl->mutex); 1531 kfree(fl); 1532 file->private_data = NULL; 1533 1534 return 0; 1535 } 1536 1537 static int fastrpc_device_open(struct inode *inode, struct file *filp) 1538 { 1539 struct fastrpc_channel_ctx *cctx; 1540 struct fastrpc_device *fdevice; 1541 struct fastrpc_user *fl = NULL; 1542 unsigned long flags; 1543 1544 fdevice = miscdev_to_fdevice(filp->private_data); 1545 cctx = fdevice->cctx; 1546 1547 fl = kzalloc(sizeof(*fl), GFP_KERNEL); 1548 if (!fl) 1549 return -ENOMEM; 1550 1551 /* Released in fastrpc_device_release() */ 1552 fastrpc_channel_ctx_get(cctx); 1553 1554 filp->private_data = fl; 1555 spin_lock_init(&fl->lock); 1556 mutex_init(&fl->mutex); 1557 INIT_LIST_HEAD(&fl->pending); 1558 INIT_LIST_HEAD(&fl->maps); 1559 INIT_LIST_HEAD(&fl->mmaps); 1560 INIT_LIST_HEAD(&fl->user); 1561 fl->tgid = current->tgid; 1562 fl->cctx = cctx; 1563 fl->is_secure_dev = fdevice->secure; 1564 1565 fl->sctx = fastrpc_session_alloc(cctx); 1566 if (!fl->sctx) { 1567 dev_err(&cctx->rpdev->dev, "No session available\n"); 1568 mutex_destroy(&fl->mutex); 1569 kfree(fl); 1570 1571 return -EBUSY; 1572 } 1573 1574 spin_lock_irqsave(&cctx->lock, flags); 1575 list_add_tail(&fl->user, &cctx->users); 1576 spin_unlock_irqrestore(&cctx->lock, flags); 1577 1578 return 0; 1579 } 1580 1581 static int fastrpc_dmabuf_alloc(struct fastrpc_user *fl, char __user *argp) 1582 { 1583 struct fastrpc_alloc_dma_buf bp; 1584 DEFINE_DMA_BUF_EXPORT_INFO(exp_info); 1585 struct fastrpc_buf *buf = NULL; 1586 int err; 1587 1588 if (copy_from_user(&bp, argp, sizeof(bp))) 1589 return -EFAULT; 1590 1591 err = fastrpc_buf_alloc(fl, fl->sctx->dev, bp.size, &buf); 1592 if (err) 1593 return err; 1594 exp_info.ops = &fastrpc_dma_buf_ops; 1595 exp_info.size = bp.size; 1596 exp_info.flags = O_RDWR; 1597 exp_info.priv = buf; 1598 buf->dmabuf = dma_buf_export(&exp_info); 1599 if (IS_ERR(buf->dmabuf)) { 1600 err = PTR_ERR(buf->dmabuf); 1601 fastrpc_buf_free(buf); 1602 return err; 1603 } 1604 1605 bp.fd = dma_buf_fd(buf->dmabuf, O_ACCMODE); 1606 if (bp.fd < 0) { 1607 dma_buf_put(buf->dmabuf); 1608 return -EINVAL; 1609 } 1610 1611 if (copy_to_user(argp, &bp, sizeof(bp))) { 1612 /* 1613 * The usercopy failed, but we can't do much about it, as 1614 * dma_buf_fd() already called fd_install() and made the 1615 * file descriptor accessible for the current process. It 1616 * might already be closed and dmabuf no longer valid when 1617 * we reach this point. Therefore "leak" the fd and rely on 1618 * the process exit path to do any required cleanup. 1619 */ 1620 return -EFAULT; 1621 } 1622 1623 return 0; 1624 } 1625 1626 static int fastrpc_init_attach(struct fastrpc_user *fl, int pd) 1627 { 1628 struct fastrpc_invoke_args args[1]; 1629 int tgid = fl->tgid; 1630 u32 sc; 1631 1632 args[0].ptr = (u64)(uintptr_t) &tgid; 1633 args[0].length = sizeof(tgid); 1634 args[0].fd = -1; 1635 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_ATTACH, 1, 0); 1636 fl->pd = pd; 1637 1638 return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1639 sc, &args[0]); 1640 } 1641 1642 static int fastrpc_invoke(struct fastrpc_user *fl, char __user *argp) 1643 { 1644 struct fastrpc_invoke_args *args = NULL; 1645 struct fastrpc_invoke inv; 1646 u32 nscalars; 1647 int err; 1648 1649 if (copy_from_user(&inv, argp, sizeof(inv))) 1650 return -EFAULT; 1651 1652 /* nscalars is truncated here to max supported value */ 1653 nscalars = REMOTE_SCALARS_LENGTH(inv.sc); 1654 if (nscalars) { 1655 args = kcalloc(nscalars, sizeof(*args), GFP_KERNEL); 1656 if (!args) 1657 return -ENOMEM; 1658 1659 if (copy_from_user(args, (void __user *)(uintptr_t)inv.args, 1660 nscalars * sizeof(*args))) { 1661 kfree(args); 1662 return -EFAULT; 1663 } 1664 } 1665 1666 err = fastrpc_internal_invoke(fl, false, inv.handle, inv.sc, args); 1667 kfree(args); 1668 1669 return err; 1670 } 1671 1672 static int fastrpc_get_info_from_dsp(struct fastrpc_user *fl, uint32_t *dsp_attr_buf, 1673 uint32_t dsp_attr_buf_len) 1674 { 1675 struct fastrpc_invoke_args args[2] = { 0 }; 1676 1677 /* Capability filled in userspace */ 1678 dsp_attr_buf[0] = 0; 1679 1680 args[0].ptr = (u64)(uintptr_t)&dsp_attr_buf_len; 1681 args[0].length = sizeof(dsp_attr_buf_len); 1682 args[0].fd = -1; 1683 args[1].ptr = (u64)(uintptr_t)&dsp_attr_buf[1]; 1684 args[1].length = dsp_attr_buf_len; 1685 args[1].fd = -1; 1686 fl->pd = USER_PD; 1687 1688 return fastrpc_internal_invoke(fl, true, FASTRPC_DSP_UTILITIES_HANDLE, 1689 FASTRPC_SCALARS(0, 1, 1), args); 1690 } 1691 1692 static int fastrpc_get_info_from_kernel(struct fastrpc_ioctl_capability *cap, 1693 struct fastrpc_user *fl) 1694 { 1695 struct fastrpc_channel_ctx *cctx = fl->cctx; 1696 uint32_t attribute_id = cap->attribute_id; 1697 uint32_t *dsp_attributes; 1698 unsigned long flags; 1699 uint32_t domain = cap->domain; 1700 int err; 1701 1702 spin_lock_irqsave(&cctx->lock, flags); 1703 /* check if we already have queried dsp for attributes */ 1704 if (cctx->valid_attributes) { 1705 spin_unlock_irqrestore(&cctx->lock, flags); 1706 goto done; 1707 } 1708 spin_unlock_irqrestore(&cctx->lock, flags); 1709 1710 dsp_attributes = kzalloc(FASTRPC_MAX_DSP_ATTRIBUTES_LEN, GFP_KERNEL); 1711 if (!dsp_attributes) 1712 return -ENOMEM; 1713 1714 err = fastrpc_get_info_from_dsp(fl, dsp_attributes, FASTRPC_MAX_DSP_ATTRIBUTES_LEN); 1715 if (err == DSP_UNSUPPORTED_API) { 1716 dev_info(&cctx->rpdev->dev, 1717 "Warning: DSP capabilities not supported on domain: %d\n", domain); 1718 kfree(dsp_attributes); 1719 return -EOPNOTSUPP; 1720 } else if (err) { 1721 dev_err(&cctx->rpdev->dev, "Error: dsp information is incorrect err: %d\n", err); 1722 kfree(dsp_attributes); 1723 return err; 1724 } 1725 1726 spin_lock_irqsave(&cctx->lock, flags); 1727 memcpy(cctx->dsp_attributes, dsp_attributes, FASTRPC_MAX_DSP_ATTRIBUTES_LEN); 1728 cctx->valid_attributes = true; 1729 spin_unlock_irqrestore(&cctx->lock, flags); 1730 kfree(dsp_attributes); 1731 done: 1732 cap->capability = cctx->dsp_attributes[attribute_id]; 1733 return 0; 1734 } 1735 1736 static int fastrpc_get_dsp_info(struct fastrpc_user *fl, char __user *argp) 1737 { 1738 struct fastrpc_ioctl_capability cap = {0}; 1739 int err = 0; 1740 1741 if (copy_from_user(&cap, argp, sizeof(cap))) 1742 return -EFAULT; 1743 1744 cap.capability = 0; 1745 if (cap.domain >= FASTRPC_DEV_MAX) { 1746 dev_err(&fl->cctx->rpdev->dev, "Error: Invalid domain id:%d, err:%d\n", 1747 cap.domain, err); 1748 return -ECHRNG; 1749 } 1750 1751 /* Fastrpc Capablities does not support modem domain */ 1752 if (cap.domain == MDSP_DOMAIN_ID) { 1753 dev_err(&fl->cctx->rpdev->dev, "Error: modem not supported %d\n", err); 1754 return -ECHRNG; 1755 } 1756 1757 if (cap.attribute_id >= FASTRPC_MAX_DSP_ATTRIBUTES) { 1758 dev_err(&fl->cctx->rpdev->dev, "Error: invalid attribute: %d, err: %d\n", 1759 cap.attribute_id, err); 1760 return -EOVERFLOW; 1761 } 1762 1763 err = fastrpc_get_info_from_kernel(&cap, fl); 1764 if (err) 1765 return err; 1766 1767 if (copy_to_user(argp, &cap.capability, sizeof(cap.capability))) 1768 return -EFAULT; 1769 1770 return 0; 1771 } 1772 1773 static int fastrpc_req_munmap_impl(struct fastrpc_user *fl, struct fastrpc_buf *buf) 1774 { 1775 struct fastrpc_invoke_args args[1] = { [0] = { 0 } }; 1776 struct fastrpc_munmap_req_msg req_msg; 1777 struct device *dev = fl->sctx->dev; 1778 int err; 1779 u32 sc; 1780 1781 req_msg.pgid = fl->tgid; 1782 req_msg.size = buf->size; 1783 req_msg.vaddr = buf->raddr; 1784 1785 args[0].ptr = (u64) (uintptr_t) &req_msg; 1786 args[0].length = sizeof(req_msg); 1787 1788 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MUNMAP, 1, 0); 1789 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, 1790 &args[0]); 1791 if (!err) { 1792 dev_dbg(dev, "unmmap\tpt 0x%09lx OK\n", buf->raddr); 1793 spin_lock(&fl->lock); 1794 list_del(&buf->node); 1795 spin_unlock(&fl->lock); 1796 fastrpc_buf_free(buf); 1797 } else { 1798 dev_err(dev, "unmmap\tpt 0x%09lx ERROR\n", buf->raddr); 1799 } 1800 1801 return err; 1802 } 1803 1804 static int fastrpc_req_munmap(struct fastrpc_user *fl, char __user *argp) 1805 { 1806 struct fastrpc_buf *buf = NULL, *iter, *b; 1807 struct fastrpc_req_munmap req; 1808 struct device *dev = fl->sctx->dev; 1809 1810 if (copy_from_user(&req, argp, sizeof(req))) 1811 return -EFAULT; 1812 1813 spin_lock(&fl->lock); 1814 list_for_each_entry_safe(iter, b, &fl->mmaps, node) { 1815 if ((iter->raddr == req.vaddrout) && (iter->size == req.size)) { 1816 buf = iter; 1817 break; 1818 } 1819 } 1820 spin_unlock(&fl->lock); 1821 1822 if (!buf) { 1823 dev_err(dev, "mmap\t\tpt 0x%09llx [len 0x%08llx] not in list\n", 1824 req.vaddrout, req.size); 1825 return -EINVAL; 1826 } 1827 1828 return fastrpc_req_munmap_impl(fl, buf); 1829 } 1830 1831 static int fastrpc_req_mmap(struct fastrpc_user *fl, char __user *argp) 1832 { 1833 struct fastrpc_invoke_args args[3] = { [0 ... 2] = { 0 } }; 1834 struct fastrpc_buf *buf = NULL; 1835 struct fastrpc_mmap_req_msg req_msg; 1836 struct fastrpc_mmap_rsp_msg rsp_msg; 1837 struct fastrpc_phy_page pages; 1838 struct fastrpc_req_mmap req; 1839 struct device *dev = fl->sctx->dev; 1840 int err; 1841 u32 sc; 1842 1843 if (copy_from_user(&req, argp, sizeof(req))) 1844 return -EFAULT; 1845 1846 if (req.flags != ADSP_MMAP_ADD_PAGES && req.flags != ADSP_MMAP_REMOTE_HEAP_ADDR) { 1847 dev_err(dev, "flag not supported 0x%x\n", req.flags); 1848 1849 return -EINVAL; 1850 } 1851 1852 if (req.vaddrin) { 1853 dev_err(dev, "adding user allocated pages is not supported\n"); 1854 return -EINVAL; 1855 } 1856 1857 err = fastrpc_buf_alloc(fl, fl->sctx->dev, req.size, &buf); 1858 if (err) { 1859 dev_err(dev, "failed to allocate buffer\n"); 1860 return err; 1861 } 1862 1863 req_msg.pgid = fl->tgid; 1864 req_msg.flags = req.flags; 1865 req_msg.vaddr = req.vaddrin; 1866 req_msg.num = sizeof(pages); 1867 1868 args[0].ptr = (u64) (uintptr_t) &req_msg; 1869 args[0].length = sizeof(req_msg); 1870 1871 pages.addr = buf->phys; 1872 pages.size = buf->size; 1873 1874 args[1].ptr = (u64) (uintptr_t) &pages; 1875 args[1].length = sizeof(pages); 1876 1877 args[2].ptr = (u64) (uintptr_t) &rsp_msg; 1878 args[2].length = sizeof(rsp_msg); 1879 1880 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MMAP, 2, 1); 1881 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, 1882 &args[0]); 1883 if (err) { 1884 dev_err(dev, "mmap error (len 0x%08llx)\n", buf->size); 1885 goto err_invoke; 1886 } 1887 1888 /* update the buffer to be able to deallocate the memory on the DSP */ 1889 buf->raddr = (uintptr_t) rsp_msg.vaddr; 1890 1891 /* let the client know the address to use */ 1892 req.vaddrout = rsp_msg.vaddr; 1893 1894 /* Add memory to static PD pool, protection thru hypervisor */ 1895 if (req.flags != ADSP_MMAP_REMOTE_HEAP_ADDR && fl->cctx->vmcount) { 1896 struct qcom_scm_vmperm perm; 1897 1898 perm.vmid = QCOM_SCM_VMID_HLOS; 1899 perm.perm = QCOM_SCM_PERM_RWX; 1900 err = qcom_scm_assign_mem(buf->phys, buf->size, 1901 &fl->cctx->perms, &perm, 1); 1902 if (err) { 1903 dev_err(fl->sctx->dev, "Failed to assign memory phys 0x%llx size 0x%llx err %d", 1904 buf->phys, buf->size, err); 1905 goto err_assign; 1906 } 1907 } 1908 1909 spin_lock(&fl->lock); 1910 list_add_tail(&buf->node, &fl->mmaps); 1911 spin_unlock(&fl->lock); 1912 1913 if (copy_to_user((void __user *)argp, &req, sizeof(req))) { 1914 err = -EFAULT; 1915 goto err_assign; 1916 } 1917 1918 dev_dbg(dev, "mmap\t\tpt 0x%09lx OK [len 0x%08llx]\n", 1919 buf->raddr, buf->size); 1920 1921 return 0; 1922 1923 err_assign: 1924 fastrpc_req_munmap_impl(fl, buf); 1925 err_invoke: 1926 fastrpc_buf_free(buf); 1927 1928 return err; 1929 } 1930 1931 static int fastrpc_req_mem_unmap_impl(struct fastrpc_user *fl, struct fastrpc_mem_unmap *req) 1932 { 1933 struct fastrpc_invoke_args args[1] = { [0] = { 0 } }; 1934 struct fastrpc_map *map = NULL, *iter, *m; 1935 struct fastrpc_mem_unmap_req_msg req_msg = { 0 }; 1936 int err = 0; 1937 u32 sc; 1938 struct device *dev = fl->sctx->dev; 1939 1940 spin_lock(&fl->lock); 1941 list_for_each_entry_safe(iter, m, &fl->maps, node) { 1942 if ((req->fd < 0 || iter->fd == req->fd) && (iter->raddr == req->vaddr)) { 1943 map = iter; 1944 break; 1945 } 1946 } 1947 1948 spin_unlock(&fl->lock); 1949 1950 if (!map) { 1951 dev_err(dev, "map not in list\n"); 1952 return -EINVAL; 1953 } 1954 1955 req_msg.pgid = fl->tgid; 1956 req_msg.len = map->len; 1957 req_msg.vaddrin = map->raddr; 1958 req_msg.fd = map->fd; 1959 1960 args[0].ptr = (u64) (uintptr_t) &req_msg; 1961 args[0].length = sizeof(req_msg); 1962 1963 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MEM_UNMAP, 1, 0); 1964 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, 1965 &args[0]); 1966 fastrpc_map_put(map); 1967 if (err) 1968 dev_err(dev, "unmmap\tpt fd = %d, 0x%09llx error\n", map->fd, map->raddr); 1969 1970 return err; 1971 } 1972 1973 static int fastrpc_req_mem_unmap(struct fastrpc_user *fl, char __user *argp) 1974 { 1975 struct fastrpc_mem_unmap req; 1976 1977 if (copy_from_user(&req, argp, sizeof(req))) 1978 return -EFAULT; 1979 1980 return fastrpc_req_mem_unmap_impl(fl, &req); 1981 } 1982 1983 static int fastrpc_req_mem_map(struct fastrpc_user *fl, char __user *argp) 1984 { 1985 struct fastrpc_invoke_args args[4] = { [0 ... 3] = { 0 } }; 1986 struct fastrpc_mem_map_req_msg req_msg = { 0 }; 1987 struct fastrpc_mmap_rsp_msg rsp_msg = { 0 }; 1988 struct fastrpc_mem_unmap req_unmap = { 0 }; 1989 struct fastrpc_phy_page pages = { 0 }; 1990 struct fastrpc_mem_map req; 1991 struct device *dev = fl->sctx->dev; 1992 struct fastrpc_map *map = NULL; 1993 int err; 1994 u32 sc; 1995 1996 if (copy_from_user(&req, argp, sizeof(req))) 1997 return -EFAULT; 1998 1999 /* create SMMU mapping */ 2000 err = fastrpc_map_create(fl, req.fd, req.length, 0, &map); 2001 if (err) { 2002 dev_err(dev, "failed to map buffer, fd = %d\n", req.fd); 2003 return err; 2004 } 2005 2006 req_msg.pgid = fl->tgid; 2007 req_msg.fd = req.fd; 2008 req_msg.offset = req.offset; 2009 req_msg.vaddrin = req.vaddrin; 2010 map->va = (void *) (uintptr_t) req.vaddrin; 2011 req_msg.flags = req.flags; 2012 req_msg.num = sizeof(pages); 2013 req_msg.data_len = 0; 2014 2015 args[0].ptr = (u64) (uintptr_t) &req_msg; 2016 args[0].length = sizeof(req_msg); 2017 2018 pages.addr = map->phys; 2019 pages.size = map->size; 2020 2021 args[1].ptr = (u64) (uintptr_t) &pages; 2022 args[1].length = sizeof(pages); 2023 2024 args[2].ptr = (u64) (uintptr_t) &pages; 2025 args[2].length = 0; 2026 2027 args[3].ptr = (u64) (uintptr_t) &rsp_msg; 2028 args[3].length = sizeof(rsp_msg); 2029 2030 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MEM_MAP, 3, 1); 2031 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, &args[0]); 2032 if (err) { 2033 dev_err(dev, "mem mmap error, fd %d, vaddr %llx, size %lld\n", 2034 req.fd, req.vaddrin, map->size); 2035 goto err_invoke; 2036 } 2037 2038 /* update the buffer to be able to deallocate the memory on the DSP */ 2039 map->raddr = rsp_msg.vaddr; 2040 2041 /* let the client know the address to use */ 2042 req.vaddrout = rsp_msg.vaddr; 2043 2044 if (copy_to_user((void __user *)argp, &req, sizeof(req))) { 2045 /* unmap the memory and release the buffer */ 2046 req_unmap.vaddr = (uintptr_t) rsp_msg.vaddr; 2047 req_unmap.length = map->size; 2048 fastrpc_req_mem_unmap_impl(fl, &req_unmap); 2049 return -EFAULT; 2050 } 2051 2052 return 0; 2053 2054 err_invoke: 2055 fastrpc_map_put(map); 2056 2057 return err; 2058 } 2059 2060 static long fastrpc_device_ioctl(struct file *file, unsigned int cmd, 2061 unsigned long arg) 2062 { 2063 struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; 2064 char __user *argp = (char __user *)arg; 2065 int err; 2066 2067 switch (cmd) { 2068 case FASTRPC_IOCTL_INVOKE: 2069 err = fastrpc_invoke(fl, argp); 2070 break; 2071 case FASTRPC_IOCTL_INIT_ATTACH: 2072 err = fastrpc_init_attach(fl, ROOT_PD); 2073 break; 2074 case FASTRPC_IOCTL_INIT_ATTACH_SNS: 2075 err = fastrpc_init_attach(fl, SENSORS_PD); 2076 break; 2077 case FASTRPC_IOCTL_INIT_CREATE_STATIC: 2078 err = fastrpc_init_create_static_process(fl, argp); 2079 break; 2080 case FASTRPC_IOCTL_INIT_CREATE: 2081 err = fastrpc_init_create_process(fl, argp); 2082 break; 2083 case FASTRPC_IOCTL_ALLOC_DMA_BUFF: 2084 err = fastrpc_dmabuf_alloc(fl, argp); 2085 break; 2086 case FASTRPC_IOCTL_MMAP: 2087 err = fastrpc_req_mmap(fl, argp); 2088 break; 2089 case FASTRPC_IOCTL_MUNMAP: 2090 err = fastrpc_req_munmap(fl, argp); 2091 break; 2092 case FASTRPC_IOCTL_MEM_MAP: 2093 err = fastrpc_req_mem_map(fl, argp); 2094 break; 2095 case FASTRPC_IOCTL_MEM_UNMAP: 2096 err = fastrpc_req_mem_unmap(fl, argp); 2097 break; 2098 case FASTRPC_IOCTL_GET_DSP_INFO: 2099 err = fastrpc_get_dsp_info(fl, argp); 2100 break; 2101 default: 2102 err = -ENOTTY; 2103 break; 2104 } 2105 2106 return err; 2107 } 2108 2109 static const struct file_operations fastrpc_fops = { 2110 .open = fastrpc_device_open, 2111 .release = fastrpc_device_release, 2112 .unlocked_ioctl = fastrpc_device_ioctl, 2113 .compat_ioctl = fastrpc_device_ioctl, 2114 }; 2115 2116 static int fastrpc_cb_probe(struct platform_device *pdev) 2117 { 2118 struct fastrpc_channel_ctx *cctx; 2119 struct fastrpc_session_ctx *sess; 2120 struct device *dev = &pdev->dev; 2121 int i, sessions = 0; 2122 unsigned long flags; 2123 int rc; 2124 2125 cctx = dev_get_drvdata(dev->parent); 2126 if (!cctx) 2127 return -EINVAL; 2128 2129 of_property_read_u32(dev->of_node, "qcom,nsessions", &sessions); 2130 2131 spin_lock_irqsave(&cctx->lock, flags); 2132 if (cctx->sesscount >= FASTRPC_MAX_SESSIONS) { 2133 dev_err(&pdev->dev, "too many sessions\n"); 2134 spin_unlock_irqrestore(&cctx->lock, flags); 2135 return -ENOSPC; 2136 } 2137 sess = &cctx->session[cctx->sesscount++]; 2138 sess->used = false; 2139 sess->valid = true; 2140 sess->dev = dev; 2141 dev_set_drvdata(dev, sess); 2142 2143 if (of_property_read_u32(dev->of_node, "reg", &sess->sid)) 2144 dev_info(dev, "FastRPC Session ID not specified in DT\n"); 2145 2146 if (sessions > 0) { 2147 struct fastrpc_session_ctx *dup_sess; 2148 2149 for (i = 1; i < sessions; i++) { 2150 if (cctx->sesscount >= FASTRPC_MAX_SESSIONS) 2151 break; 2152 dup_sess = &cctx->session[cctx->sesscount++]; 2153 memcpy(dup_sess, sess, sizeof(*dup_sess)); 2154 } 2155 } 2156 spin_unlock_irqrestore(&cctx->lock, flags); 2157 rc = dma_set_mask(dev, DMA_BIT_MASK(32)); 2158 if (rc) { 2159 dev_err(dev, "32-bit DMA enable failed\n"); 2160 return rc; 2161 } 2162 2163 return 0; 2164 } 2165 2166 static int fastrpc_cb_remove(struct platform_device *pdev) 2167 { 2168 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(pdev->dev.parent); 2169 struct fastrpc_session_ctx *sess = dev_get_drvdata(&pdev->dev); 2170 unsigned long flags; 2171 int i; 2172 2173 spin_lock_irqsave(&cctx->lock, flags); 2174 for (i = 1; i < FASTRPC_MAX_SESSIONS; i++) { 2175 if (cctx->session[i].sid == sess->sid) { 2176 cctx->session[i].valid = false; 2177 cctx->sesscount--; 2178 } 2179 } 2180 spin_unlock_irqrestore(&cctx->lock, flags); 2181 2182 return 0; 2183 } 2184 2185 static const struct of_device_id fastrpc_match_table[] = { 2186 { .compatible = "qcom,fastrpc-compute-cb", }, 2187 {} 2188 }; 2189 2190 static struct platform_driver fastrpc_cb_driver = { 2191 .probe = fastrpc_cb_probe, 2192 .remove = fastrpc_cb_remove, 2193 .driver = { 2194 .name = "qcom,fastrpc-cb", 2195 .of_match_table = fastrpc_match_table, 2196 .suppress_bind_attrs = true, 2197 }, 2198 }; 2199 2200 static int fastrpc_device_register(struct device *dev, struct fastrpc_channel_ctx *cctx, 2201 bool is_secured, const char *domain) 2202 { 2203 struct fastrpc_device *fdev; 2204 int err; 2205 2206 fdev = devm_kzalloc(dev, sizeof(*fdev), GFP_KERNEL); 2207 if (!fdev) 2208 return -ENOMEM; 2209 2210 fdev->secure = is_secured; 2211 fdev->cctx = cctx; 2212 fdev->miscdev.minor = MISC_DYNAMIC_MINOR; 2213 fdev->miscdev.fops = &fastrpc_fops; 2214 fdev->miscdev.name = devm_kasprintf(dev, GFP_KERNEL, "fastrpc-%s%s", 2215 domain, is_secured ? "-secure" : ""); 2216 err = misc_register(&fdev->miscdev); 2217 if (!err) { 2218 if (is_secured) 2219 cctx->secure_fdevice = fdev; 2220 else 2221 cctx->fdevice = fdev; 2222 } 2223 2224 return err; 2225 } 2226 2227 static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev) 2228 { 2229 struct device *rdev = &rpdev->dev; 2230 struct fastrpc_channel_ctx *data; 2231 int i, err, domain_id = -1, vmcount; 2232 const char *domain; 2233 bool secure_dsp; 2234 unsigned int vmids[FASTRPC_MAX_VMIDS]; 2235 2236 err = of_property_read_string(rdev->of_node, "label", &domain); 2237 if (err) { 2238 dev_info(rdev, "FastRPC Domain not specified in DT\n"); 2239 return err; 2240 } 2241 2242 for (i = 0; i <= CDSP_DOMAIN_ID; i++) { 2243 if (!strcmp(domains[i], domain)) { 2244 domain_id = i; 2245 break; 2246 } 2247 } 2248 2249 if (domain_id < 0) { 2250 dev_info(rdev, "FastRPC Invalid Domain ID %d\n", domain_id); 2251 return -EINVAL; 2252 } 2253 2254 if (of_reserved_mem_device_init_by_idx(rdev, rdev->of_node, 0)) 2255 dev_info(rdev, "no reserved DMA memory for FASTRPC\n"); 2256 2257 vmcount = of_property_read_variable_u32_array(rdev->of_node, 2258 "qcom,vmids", &vmids[0], 0, FASTRPC_MAX_VMIDS); 2259 if (vmcount < 0) 2260 vmcount = 0; 2261 else if (!qcom_scm_is_available()) 2262 return -EPROBE_DEFER; 2263 2264 data = kzalloc(sizeof(*data), GFP_KERNEL); 2265 if (!data) 2266 return -ENOMEM; 2267 2268 if (vmcount) { 2269 data->vmcount = vmcount; 2270 data->perms = BIT(QCOM_SCM_VMID_HLOS); 2271 for (i = 0; i < data->vmcount; i++) { 2272 data->vmperms[i].vmid = vmids[i]; 2273 data->vmperms[i].perm = QCOM_SCM_PERM_RWX; 2274 } 2275 } 2276 2277 secure_dsp = !(of_property_read_bool(rdev->of_node, "qcom,non-secure-domain")); 2278 data->secure = secure_dsp; 2279 2280 switch (domain_id) { 2281 case ADSP_DOMAIN_ID: 2282 case MDSP_DOMAIN_ID: 2283 case SDSP_DOMAIN_ID: 2284 /* Unsigned PD offloading is only supported on CDSP*/ 2285 data->unsigned_support = false; 2286 err = fastrpc_device_register(rdev, data, secure_dsp, domains[domain_id]); 2287 if (err) 2288 goto fdev_error; 2289 break; 2290 case CDSP_DOMAIN_ID: 2291 data->unsigned_support = true; 2292 /* Create both device nodes so that we can allow both Signed and Unsigned PD */ 2293 err = fastrpc_device_register(rdev, data, true, domains[domain_id]); 2294 if (err) 2295 goto fdev_error; 2296 2297 err = fastrpc_device_register(rdev, data, false, domains[domain_id]); 2298 if (err) 2299 goto fdev_error; 2300 break; 2301 default: 2302 err = -EINVAL; 2303 goto fdev_error; 2304 } 2305 2306 kref_init(&data->refcount); 2307 2308 dev_set_drvdata(&rpdev->dev, data); 2309 rdev->dma_mask = &data->dma_mask; 2310 dma_set_mask_and_coherent(rdev, DMA_BIT_MASK(32)); 2311 INIT_LIST_HEAD(&data->users); 2312 INIT_LIST_HEAD(&data->invoke_interrupted_mmaps); 2313 spin_lock_init(&data->lock); 2314 idr_init(&data->ctx_idr); 2315 data->domain_id = domain_id; 2316 data->rpdev = rpdev; 2317 2318 return of_platform_populate(rdev->of_node, NULL, NULL, rdev); 2319 fdev_error: 2320 kfree(data); 2321 return err; 2322 } 2323 2324 static void fastrpc_notify_users(struct fastrpc_user *user) 2325 { 2326 struct fastrpc_invoke_ctx *ctx; 2327 2328 spin_lock(&user->lock); 2329 list_for_each_entry(ctx, &user->pending, node) 2330 complete(&ctx->work); 2331 spin_unlock(&user->lock); 2332 } 2333 2334 static void fastrpc_rpmsg_remove(struct rpmsg_device *rpdev) 2335 { 2336 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); 2337 struct fastrpc_buf *buf, *b; 2338 struct fastrpc_user *user; 2339 unsigned long flags; 2340 2341 spin_lock_irqsave(&cctx->lock, flags); 2342 list_for_each_entry(user, &cctx->users, user) 2343 fastrpc_notify_users(user); 2344 spin_unlock_irqrestore(&cctx->lock, flags); 2345 2346 if (cctx->fdevice) 2347 misc_deregister(&cctx->fdevice->miscdev); 2348 2349 if (cctx->secure_fdevice) 2350 misc_deregister(&cctx->secure_fdevice->miscdev); 2351 2352 list_for_each_entry_safe(buf, b, &cctx->invoke_interrupted_mmaps, node) 2353 list_del(&buf->node); 2354 2355 if (cctx->remote_heap) 2356 fastrpc_buf_free(cctx->remote_heap); 2357 2358 of_platform_depopulate(&rpdev->dev); 2359 2360 cctx->rpdev = NULL; 2361 fastrpc_channel_ctx_put(cctx); 2362 } 2363 2364 static int fastrpc_rpmsg_callback(struct rpmsg_device *rpdev, void *data, 2365 int len, void *priv, u32 addr) 2366 { 2367 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); 2368 struct fastrpc_invoke_rsp *rsp = data; 2369 struct fastrpc_invoke_ctx *ctx; 2370 unsigned long flags; 2371 unsigned long ctxid; 2372 2373 if (len < sizeof(*rsp)) 2374 return -EINVAL; 2375 2376 ctxid = ((rsp->ctx & FASTRPC_CTXID_MASK) >> 4); 2377 2378 spin_lock_irqsave(&cctx->lock, flags); 2379 ctx = idr_find(&cctx->ctx_idr, ctxid); 2380 spin_unlock_irqrestore(&cctx->lock, flags); 2381 2382 if (!ctx) { 2383 dev_err(&rpdev->dev, "No context ID matches response\n"); 2384 return -ENOENT; 2385 } 2386 2387 ctx->retval = rsp->retval; 2388 complete(&ctx->work); 2389 2390 /* 2391 * The DMA buffer associated with the context cannot be freed in 2392 * interrupt context so schedule it through a worker thread to 2393 * avoid a kernel BUG. 2394 */ 2395 schedule_work(&ctx->put_work); 2396 2397 return 0; 2398 } 2399 2400 static const struct of_device_id fastrpc_rpmsg_of_match[] = { 2401 { .compatible = "qcom,fastrpc" }, 2402 { }, 2403 }; 2404 MODULE_DEVICE_TABLE(of, fastrpc_rpmsg_of_match); 2405 2406 static struct rpmsg_driver fastrpc_driver = { 2407 .probe = fastrpc_rpmsg_probe, 2408 .remove = fastrpc_rpmsg_remove, 2409 .callback = fastrpc_rpmsg_callback, 2410 .drv = { 2411 .name = "qcom,fastrpc", 2412 .of_match_table = fastrpc_rpmsg_of_match, 2413 }, 2414 }; 2415 2416 static int fastrpc_init(void) 2417 { 2418 int ret; 2419 2420 ret = platform_driver_register(&fastrpc_cb_driver); 2421 if (ret < 0) { 2422 pr_err("fastrpc: failed to register cb driver\n"); 2423 return ret; 2424 } 2425 2426 ret = register_rpmsg_driver(&fastrpc_driver); 2427 if (ret < 0) { 2428 pr_err("fastrpc: failed to register rpmsg driver\n"); 2429 platform_driver_unregister(&fastrpc_cb_driver); 2430 return ret; 2431 } 2432 2433 return 0; 2434 } 2435 module_init(fastrpc_init); 2436 2437 static void fastrpc_exit(void) 2438 { 2439 platform_driver_unregister(&fastrpc_cb_driver); 2440 unregister_rpmsg_driver(&fastrpc_driver); 2441 } 2442 module_exit(fastrpc_exit); 2443 2444 MODULE_LICENSE("GPL v2"); 2445 MODULE_IMPORT_NS(DMA_BUF); 2446