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/platform_device.h> 17 #include <linux/sort.h> 18 #include <linux/of_platform.h> 19 #include <linux/rpmsg.h> 20 #include <linux/scatterlist.h> 21 #include <linux/slab.h> 22 #include <linux/firmware/qcom/qcom_scm.h> 23 #include <uapi/misc/fastrpc.h> 24 #include <linux/of_reserved_mem.h> 25 26 #define ADSP_DOMAIN_ID (0) 27 #define MDSP_DOMAIN_ID (1) 28 #define SDSP_DOMAIN_ID (2) 29 #define CDSP_DOMAIN_ID (3) 30 #define FASTRPC_DEV_MAX 4 /* adsp, mdsp, slpi, cdsp*/ 31 #define FASTRPC_MAX_SESSIONS 14 32 #define FASTRPC_MAX_VMIDS 16 33 #define FASTRPC_ALIGN 128 34 #define FASTRPC_MAX_FDLIST 16 35 #define FASTRPC_MAX_CRCLIST 64 36 #define FASTRPC_PHYS(p) ((p) & 0xffffffff) 37 #define FASTRPC_CTX_MAX (256) 38 #define FASTRPC_INIT_HANDLE 1 39 #define FASTRPC_DSP_UTILITIES_HANDLE 2 40 #define FASTRPC_CTXID_MASK (0xFF0) 41 #define INIT_FILELEN_MAX (2 * 1024 * 1024) 42 #define INIT_FILE_NAMELEN_MAX (128) 43 #define FASTRPC_DEVICE_NAME "fastrpc" 44 45 /* Add memory to static PD pool, protection thru XPU */ 46 #define ADSP_MMAP_HEAP_ADDR 4 47 /* MAP static DMA buffer on DSP User PD */ 48 #define ADSP_MMAP_DMA_BUFFER 6 49 /* Add memory to static PD pool protection thru hypervisor */ 50 #define ADSP_MMAP_REMOTE_HEAP_ADDR 8 51 /* Add memory to userPD pool, for user heap */ 52 #define ADSP_MMAP_ADD_PAGES 0x1000 53 /* Add memory to userPD pool, for LLC heap */ 54 #define ADSP_MMAP_ADD_PAGES_LLC 0x3000, 55 56 #define DSP_UNSUPPORTED_API (0x80000414) 57 /* MAX NUMBER of DSP ATTRIBUTES SUPPORTED */ 58 #define FASTRPC_MAX_DSP_ATTRIBUTES (256) 59 #define FASTRPC_MAX_DSP_ATTRIBUTES_LEN (sizeof(u32) * FASTRPC_MAX_DSP_ATTRIBUTES) 60 61 /* Retrives number of input buffers from the scalars parameter */ 62 #define REMOTE_SCALARS_INBUFS(sc) (((sc) >> 16) & 0x0ff) 63 64 /* Retrives number of output buffers from the scalars parameter */ 65 #define REMOTE_SCALARS_OUTBUFS(sc) (((sc) >> 8) & 0x0ff) 66 67 /* Retrives number of input handles from the scalars parameter */ 68 #define REMOTE_SCALARS_INHANDLES(sc) (((sc) >> 4) & 0x0f) 69 70 /* Retrives number of output handles from the scalars parameter */ 71 #define REMOTE_SCALARS_OUTHANDLES(sc) ((sc) & 0x0f) 72 73 #define REMOTE_SCALARS_LENGTH(sc) (REMOTE_SCALARS_INBUFS(sc) + \ 74 REMOTE_SCALARS_OUTBUFS(sc) + \ 75 REMOTE_SCALARS_INHANDLES(sc)+ \ 76 REMOTE_SCALARS_OUTHANDLES(sc)) 77 #define FASTRPC_BUILD_SCALARS(attr, method, in, out, oin, oout) \ 78 (((attr & 0x07) << 29) | \ 79 ((method & 0x1f) << 24) | \ 80 ((in & 0xff) << 16) | \ 81 ((out & 0xff) << 8) | \ 82 ((oin & 0x0f) << 4) | \ 83 (oout & 0x0f)) 84 85 #define FASTRPC_SCALARS(method, in, out) \ 86 FASTRPC_BUILD_SCALARS(0, method, in, out, 0, 0) 87 88 #define FASTRPC_CREATE_PROCESS_NARGS 6 89 #define FASTRPC_CREATE_STATIC_PROCESS_NARGS 3 90 /* Remote Method id table */ 91 #define FASTRPC_RMID_INIT_ATTACH 0 92 #define FASTRPC_RMID_INIT_RELEASE 1 93 #define FASTRPC_RMID_INIT_MMAP 4 94 #define FASTRPC_RMID_INIT_MUNMAP 5 95 #define FASTRPC_RMID_INIT_CREATE 6 96 #define FASTRPC_RMID_INIT_CREATE_ATTR 7 97 #define FASTRPC_RMID_INIT_CREATE_STATIC 8 98 #define FASTRPC_RMID_INIT_MEM_MAP 10 99 #define FASTRPC_RMID_INIT_MEM_UNMAP 11 100 101 /* Protection Domain(PD) ids */ 102 #define ROOT_PD (0) 103 #define USER_PD (1) 104 #define SENSORS_PD (2) 105 106 #define miscdev_to_fdevice(d) container_of(d, struct fastrpc_device, miscdev) 107 108 static const char *domains[FASTRPC_DEV_MAX] = { "adsp", "mdsp", 109 "sdsp", "cdsp"}; 110 struct fastrpc_phy_page { 111 u64 addr; /* physical address */ 112 u64 size; /* size of contiguous region */ 113 }; 114 115 struct fastrpc_invoke_buf { 116 u32 num; /* number of contiguous regions */ 117 u32 pgidx; /* index to start of contiguous region */ 118 }; 119 120 struct fastrpc_remote_dmahandle { 121 s32 fd; /* dma handle fd */ 122 u32 offset; /* dma handle offset */ 123 u32 len; /* dma handle length */ 124 }; 125 126 struct fastrpc_remote_buf { 127 u64 pv; /* buffer pointer */ 128 u64 len; /* length of buffer */ 129 }; 130 131 union fastrpc_remote_arg { 132 struct fastrpc_remote_buf buf; 133 struct fastrpc_remote_dmahandle dma; 134 }; 135 136 struct fastrpc_mmap_rsp_msg { 137 u64 vaddr; 138 }; 139 140 struct fastrpc_mmap_req_msg { 141 s32 pgid; 142 u32 flags; 143 u64 vaddr; 144 s32 num; 145 }; 146 147 struct fastrpc_mem_map_req_msg { 148 s32 pgid; 149 s32 fd; 150 s32 offset; 151 u32 flags; 152 u64 vaddrin; 153 s32 num; 154 s32 data_len; 155 }; 156 157 struct fastrpc_munmap_req_msg { 158 s32 pgid; 159 u64 vaddr; 160 u64 size; 161 }; 162 163 struct fastrpc_mem_unmap_req_msg { 164 s32 pgid; 165 s32 fd; 166 u64 vaddrin; 167 u64 len; 168 }; 169 170 struct fastrpc_msg { 171 int pid; /* process group id */ 172 int tid; /* thread id */ 173 u64 ctx; /* invoke caller context */ 174 u32 handle; /* handle to invoke */ 175 u32 sc; /* scalars structure describing the data */ 176 u64 addr; /* physical address */ 177 u64 size; /* size of contiguous region */ 178 }; 179 180 struct fastrpc_invoke_rsp { 181 u64 ctx; /* invoke caller context */ 182 int retval; /* invoke return value */ 183 }; 184 185 struct fastrpc_buf_overlap { 186 u64 start; 187 u64 end; 188 int raix; 189 u64 mstart; 190 u64 mend; 191 u64 offset; 192 }; 193 194 struct fastrpc_buf { 195 struct fastrpc_user *fl; 196 struct dma_buf *dmabuf; 197 struct device *dev; 198 void *virt; 199 u64 phys; 200 u64 size; 201 /* Lock for dma buf attachments */ 202 struct mutex lock; 203 struct list_head attachments; 204 /* mmap support */ 205 struct list_head node; /* list of user requested mmaps */ 206 uintptr_t raddr; 207 }; 208 209 struct fastrpc_dma_buf_attachment { 210 struct device *dev; 211 struct sg_table sgt; 212 struct list_head node; 213 }; 214 215 struct fastrpc_map { 216 struct list_head node; 217 struct fastrpc_user *fl; 218 int fd; 219 struct dma_buf *buf; 220 struct sg_table *table; 221 struct dma_buf_attachment *attach; 222 u64 phys; 223 u64 size; 224 void *va; 225 u64 len; 226 u64 raddr; 227 u32 attr; 228 struct kref refcount; 229 }; 230 231 struct fastrpc_invoke_ctx { 232 int nscalars; 233 int nbufs; 234 int retval; 235 int pid; 236 int tgid; 237 u32 sc; 238 u32 *crc; 239 u64 ctxid; 240 u64 msg_sz; 241 struct kref refcount; 242 struct list_head node; /* list of ctxs */ 243 struct completion work; 244 struct work_struct put_work; 245 struct fastrpc_msg msg; 246 struct fastrpc_user *fl; 247 union fastrpc_remote_arg *rpra; 248 struct fastrpc_map **maps; 249 struct fastrpc_buf *buf; 250 struct fastrpc_invoke_args *args; 251 struct fastrpc_buf_overlap *olaps; 252 struct fastrpc_channel_ctx *cctx; 253 }; 254 255 struct fastrpc_session_ctx { 256 struct device *dev; 257 int sid; 258 bool used; 259 bool valid; 260 }; 261 262 struct fastrpc_channel_ctx { 263 int domain_id; 264 int sesscount; 265 int vmcount; 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 vmid = map->fl->cctx->vmperms[0].vmid; 320 u64 src_perms = BIT(QCOM_SCM_VMID_HLOS) | BIT(vmid); 321 int err = 0; 322 323 perm.vmid = QCOM_SCM_VMID_HLOS; 324 perm.perm = QCOM_SCM_PERM_RWX; 325 err = qcom_scm_assign_mem(map->phys, map->size, 326 &src_perms, &perm, 1); 327 if (err) { 328 dev_err(map->fl->sctx->dev, "Failed to assign memory phys 0x%llx size 0x%llx err %d", 329 map->phys, map->size, err); 330 return; 331 } 332 } 333 dma_buf_unmap_attachment_unlocked(map->attach, map->table, 334 DMA_BIDIRECTIONAL); 335 dma_buf_detach(map->buf, map->attach); 336 dma_buf_put(map->buf); 337 } 338 339 if (map->fl) { 340 spin_lock(&map->fl->lock); 341 list_del(&map->node); 342 spin_unlock(&map->fl->lock); 343 map->fl = NULL; 344 } 345 346 kfree(map); 347 } 348 349 static void fastrpc_map_put(struct fastrpc_map *map) 350 { 351 if (map) 352 kref_put(&map->refcount, fastrpc_free_map); 353 } 354 355 static int fastrpc_map_get(struct fastrpc_map *map) 356 { 357 if (!map) 358 return -ENOENT; 359 360 return kref_get_unless_zero(&map->refcount) ? 0 : -ENOENT; 361 } 362 363 364 static int fastrpc_map_lookup(struct fastrpc_user *fl, int fd, 365 struct fastrpc_map **ppmap, bool take_ref) 366 { 367 struct fastrpc_session_ctx *sess = fl->sctx; 368 struct fastrpc_map *map = NULL; 369 int ret = -ENOENT; 370 371 spin_lock(&fl->lock); 372 list_for_each_entry(map, &fl->maps, node) { 373 if (map->fd != fd) 374 continue; 375 376 if (take_ref) { 377 ret = fastrpc_map_get(map); 378 if (ret) { 379 dev_dbg(sess->dev, "%s: Failed to get map fd=%d ret=%d\n", 380 __func__, fd, ret); 381 break; 382 } 383 } 384 385 *ppmap = map; 386 ret = 0; 387 break; 388 } 389 spin_unlock(&fl->lock); 390 391 return ret; 392 } 393 394 static void fastrpc_buf_free(struct fastrpc_buf *buf) 395 { 396 dma_free_coherent(buf->dev, buf->size, buf->virt, 397 FASTRPC_PHYS(buf->phys)); 398 kfree(buf); 399 } 400 401 static int __fastrpc_buf_alloc(struct fastrpc_user *fl, struct device *dev, 402 u64 size, struct fastrpc_buf **obuf) 403 { 404 struct fastrpc_buf *buf; 405 406 buf = kzalloc(sizeof(*buf), GFP_KERNEL); 407 if (!buf) 408 return -ENOMEM; 409 410 INIT_LIST_HEAD(&buf->attachments); 411 INIT_LIST_HEAD(&buf->node); 412 mutex_init(&buf->lock); 413 414 buf->fl = fl; 415 buf->virt = NULL; 416 buf->phys = 0; 417 buf->size = size; 418 buf->dev = dev; 419 buf->raddr = 0; 420 421 buf->virt = dma_alloc_coherent(dev, buf->size, (dma_addr_t *)&buf->phys, 422 GFP_KERNEL); 423 if (!buf->virt) { 424 mutex_destroy(&buf->lock); 425 kfree(buf); 426 return -ENOMEM; 427 } 428 429 *obuf = buf; 430 431 return 0; 432 } 433 434 static int fastrpc_buf_alloc(struct fastrpc_user *fl, struct device *dev, 435 u64 size, struct fastrpc_buf **obuf) 436 { 437 int ret; 438 struct fastrpc_buf *buf; 439 440 ret = __fastrpc_buf_alloc(fl, dev, size, obuf); 441 if (ret) 442 return ret; 443 444 buf = *obuf; 445 446 if (fl->sctx && fl->sctx->sid) 447 buf->phys += ((u64)fl->sctx->sid << 32); 448 449 return 0; 450 } 451 452 static int fastrpc_remote_heap_alloc(struct fastrpc_user *fl, struct device *dev, 453 u64 size, struct fastrpc_buf **obuf) 454 { 455 struct device *rdev = &fl->cctx->rpdev->dev; 456 457 return __fastrpc_buf_alloc(fl, rdev, size, obuf); 458 } 459 460 static void fastrpc_channel_ctx_free(struct kref *ref) 461 { 462 struct fastrpc_channel_ctx *cctx; 463 464 cctx = container_of(ref, struct fastrpc_channel_ctx, refcount); 465 466 kfree(cctx); 467 } 468 469 static void fastrpc_channel_ctx_get(struct fastrpc_channel_ctx *cctx) 470 { 471 kref_get(&cctx->refcount); 472 } 473 474 static void fastrpc_channel_ctx_put(struct fastrpc_channel_ctx *cctx) 475 { 476 kref_put(&cctx->refcount, fastrpc_channel_ctx_free); 477 } 478 479 static void fastrpc_context_free(struct kref *ref) 480 { 481 struct fastrpc_invoke_ctx *ctx; 482 struct fastrpc_channel_ctx *cctx; 483 unsigned long flags; 484 int i; 485 486 ctx = container_of(ref, struct fastrpc_invoke_ctx, refcount); 487 cctx = ctx->cctx; 488 489 for (i = 0; i < ctx->nbufs; i++) 490 fastrpc_map_put(ctx->maps[i]); 491 492 if (ctx->buf) 493 fastrpc_buf_free(ctx->buf); 494 495 spin_lock_irqsave(&cctx->lock, flags); 496 idr_remove(&cctx->ctx_idr, ctx->ctxid >> 4); 497 spin_unlock_irqrestore(&cctx->lock, flags); 498 499 kfree(ctx->maps); 500 kfree(ctx->olaps); 501 kfree(ctx); 502 503 fastrpc_channel_ctx_put(cctx); 504 } 505 506 static void fastrpc_context_get(struct fastrpc_invoke_ctx *ctx) 507 { 508 kref_get(&ctx->refcount); 509 } 510 511 static void fastrpc_context_put(struct fastrpc_invoke_ctx *ctx) 512 { 513 kref_put(&ctx->refcount, fastrpc_context_free); 514 } 515 516 static void fastrpc_context_put_wq(struct work_struct *work) 517 { 518 struct fastrpc_invoke_ctx *ctx = 519 container_of(work, struct fastrpc_invoke_ctx, put_work); 520 521 fastrpc_context_put(ctx); 522 } 523 524 #define CMP(aa, bb) ((aa) == (bb) ? 0 : (aa) < (bb) ? -1 : 1) 525 static int olaps_cmp(const void *a, const void *b) 526 { 527 struct fastrpc_buf_overlap *pa = (struct fastrpc_buf_overlap *)a; 528 struct fastrpc_buf_overlap *pb = (struct fastrpc_buf_overlap *)b; 529 /* sort with lowest starting buffer first */ 530 int st = CMP(pa->start, pb->start); 531 /* sort with highest ending buffer first */ 532 int ed = CMP(pb->end, pa->end); 533 534 return st == 0 ? ed : st; 535 } 536 537 static void fastrpc_get_buff_overlaps(struct fastrpc_invoke_ctx *ctx) 538 { 539 u64 max_end = 0; 540 int i; 541 542 for (i = 0; i < ctx->nbufs; ++i) { 543 ctx->olaps[i].start = ctx->args[i].ptr; 544 ctx->olaps[i].end = ctx->olaps[i].start + ctx->args[i].length; 545 ctx->olaps[i].raix = i; 546 } 547 548 sort(ctx->olaps, ctx->nbufs, sizeof(*ctx->olaps), olaps_cmp, NULL); 549 550 for (i = 0; i < ctx->nbufs; ++i) { 551 /* Falling inside previous range */ 552 if (ctx->olaps[i].start < max_end) { 553 ctx->olaps[i].mstart = max_end; 554 ctx->olaps[i].mend = ctx->olaps[i].end; 555 ctx->olaps[i].offset = max_end - ctx->olaps[i].start; 556 557 if (ctx->olaps[i].end > max_end) { 558 max_end = ctx->olaps[i].end; 559 } else { 560 ctx->olaps[i].mend = 0; 561 ctx->olaps[i].mstart = 0; 562 } 563 564 } else { 565 ctx->olaps[i].mend = ctx->olaps[i].end; 566 ctx->olaps[i].mstart = ctx->olaps[i].start; 567 ctx->olaps[i].offset = 0; 568 max_end = ctx->olaps[i].end; 569 } 570 } 571 } 572 573 static struct fastrpc_invoke_ctx *fastrpc_context_alloc( 574 struct fastrpc_user *user, u32 kernel, u32 sc, 575 struct fastrpc_invoke_args *args) 576 { 577 struct fastrpc_channel_ctx *cctx = user->cctx; 578 struct fastrpc_invoke_ctx *ctx = NULL; 579 unsigned long flags; 580 int ret; 581 582 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 583 if (!ctx) 584 return ERR_PTR(-ENOMEM); 585 586 INIT_LIST_HEAD(&ctx->node); 587 ctx->fl = user; 588 ctx->nscalars = REMOTE_SCALARS_LENGTH(sc); 589 ctx->nbufs = REMOTE_SCALARS_INBUFS(sc) + 590 REMOTE_SCALARS_OUTBUFS(sc); 591 592 if (ctx->nscalars) { 593 ctx->maps = kcalloc(ctx->nscalars, 594 sizeof(*ctx->maps), GFP_KERNEL); 595 if (!ctx->maps) { 596 kfree(ctx); 597 return ERR_PTR(-ENOMEM); 598 } 599 ctx->olaps = kcalloc(ctx->nscalars, 600 sizeof(*ctx->olaps), GFP_KERNEL); 601 if (!ctx->olaps) { 602 kfree(ctx->maps); 603 kfree(ctx); 604 return ERR_PTR(-ENOMEM); 605 } 606 ctx->args = args; 607 fastrpc_get_buff_overlaps(ctx); 608 } 609 610 /* Released in fastrpc_context_put() */ 611 fastrpc_channel_ctx_get(cctx); 612 613 ctx->sc = sc; 614 ctx->retval = -1; 615 ctx->pid = current->pid; 616 ctx->tgid = user->tgid; 617 ctx->cctx = cctx; 618 init_completion(&ctx->work); 619 INIT_WORK(&ctx->put_work, fastrpc_context_put_wq); 620 621 spin_lock(&user->lock); 622 list_add_tail(&ctx->node, &user->pending); 623 spin_unlock(&user->lock); 624 625 spin_lock_irqsave(&cctx->lock, flags); 626 ret = idr_alloc_cyclic(&cctx->ctx_idr, ctx, 1, 627 FASTRPC_CTX_MAX, GFP_ATOMIC); 628 if (ret < 0) { 629 spin_unlock_irqrestore(&cctx->lock, flags); 630 goto err_idr; 631 } 632 ctx->ctxid = ret << 4; 633 spin_unlock_irqrestore(&cctx->lock, flags); 634 635 kref_init(&ctx->refcount); 636 637 return ctx; 638 err_idr: 639 spin_lock(&user->lock); 640 list_del(&ctx->node); 641 spin_unlock(&user->lock); 642 fastrpc_channel_ctx_put(cctx); 643 kfree(ctx->maps); 644 kfree(ctx->olaps); 645 kfree(ctx); 646 647 return ERR_PTR(ret); 648 } 649 650 static struct sg_table * 651 fastrpc_map_dma_buf(struct dma_buf_attachment *attachment, 652 enum dma_data_direction dir) 653 { 654 struct fastrpc_dma_buf_attachment *a = attachment->priv; 655 struct sg_table *table; 656 int ret; 657 658 table = &a->sgt; 659 660 ret = dma_map_sgtable(attachment->dev, table, dir, 0); 661 if (ret) 662 table = ERR_PTR(ret); 663 return table; 664 } 665 666 static void fastrpc_unmap_dma_buf(struct dma_buf_attachment *attach, 667 struct sg_table *table, 668 enum dma_data_direction dir) 669 { 670 dma_unmap_sgtable(attach->dev, table, dir, 0); 671 } 672 673 static void fastrpc_release(struct dma_buf *dmabuf) 674 { 675 struct fastrpc_buf *buffer = dmabuf->priv; 676 677 fastrpc_buf_free(buffer); 678 } 679 680 static int fastrpc_dma_buf_attach(struct dma_buf *dmabuf, 681 struct dma_buf_attachment *attachment) 682 { 683 struct fastrpc_dma_buf_attachment *a; 684 struct fastrpc_buf *buffer = dmabuf->priv; 685 int ret; 686 687 a = kzalloc(sizeof(*a), GFP_KERNEL); 688 if (!a) 689 return -ENOMEM; 690 691 ret = dma_get_sgtable(buffer->dev, &a->sgt, buffer->virt, 692 FASTRPC_PHYS(buffer->phys), buffer->size); 693 if (ret < 0) { 694 dev_err(buffer->dev, "failed to get scatterlist from DMA API\n"); 695 kfree(a); 696 return -EINVAL; 697 } 698 699 a->dev = attachment->dev; 700 INIT_LIST_HEAD(&a->node); 701 attachment->priv = a; 702 703 mutex_lock(&buffer->lock); 704 list_add(&a->node, &buffer->attachments); 705 mutex_unlock(&buffer->lock); 706 707 return 0; 708 } 709 710 static void fastrpc_dma_buf_detatch(struct dma_buf *dmabuf, 711 struct dma_buf_attachment *attachment) 712 { 713 struct fastrpc_dma_buf_attachment *a = attachment->priv; 714 struct fastrpc_buf *buffer = dmabuf->priv; 715 716 mutex_lock(&buffer->lock); 717 list_del(&a->node); 718 mutex_unlock(&buffer->lock); 719 sg_free_table(&a->sgt); 720 kfree(a); 721 } 722 723 static int fastrpc_vmap(struct dma_buf *dmabuf, struct iosys_map *map) 724 { 725 struct fastrpc_buf *buf = dmabuf->priv; 726 727 iosys_map_set_vaddr(map, buf->virt); 728 729 return 0; 730 } 731 732 static int fastrpc_mmap(struct dma_buf *dmabuf, 733 struct vm_area_struct *vma) 734 { 735 struct fastrpc_buf *buf = dmabuf->priv; 736 size_t size = vma->vm_end - vma->vm_start; 737 738 dma_resv_assert_held(dmabuf->resv); 739 740 return dma_mmap_coherent(buf->dev, vma, buf->virt, 741 FASTRPC_PHYS(buf->phys), size); 742 } 743 744 static const struct dma_buf_ops fastrpc_dma_buf_ops = { 745 .attach = fastrpc_dma_buf_attach, 746 .detach = fastrpc_dma_buf_detatch, 747 .map_dma_buf = fastrpc_map_dma_buf, 748 .unmap_dma_buf = fastrpc_unmap_dma_buf, 749 .mmap = fastrpc_mmap, 750 .vmap = fastrpc_vmap, 751 .release = fastrpc_release, 752 }; 753 754 static int fastrpc_map_create(struct fastrpc_user *fl, int fd, 755 u64 len, u32 attr, struct fastrpc_map **ppmap) 756 { 757 struct fastrpc_session_ctx *sess = fl->sctx; 758 struct fastrpc_map *map = NULL; 759 struct sg_table *table; 760 int err = 0; 761 762 if (!fastrpc_map_lookup(fl, fd, ppmap, true)) 763 return 0; 764 765 map = kzalloc(sizeof(*map), GFP_KERNEL); 766 if (!map) 767 return -ENOMEM; 768 769 INIT_LIST_HEAD(&map->node); 770 kref_init(&map->refcount); 771 772 map->fl = fl; 773 map->fd = fd; 774 map->buf = dma_buf_get(fd); 775 if (IS_ERR(map->buf)) { 776 err = PTR_ERR(map->buf); 777 goto get_err; 778 } 779 780 map->attach = dma_buf_attach(map->buf, sess->dev); 781 if (IS_ERR(map->attach)) { 782 dev_err(sess->dev, "Failed to attach dmabuf\n"); 783 err = PTR_ERR(map->attach); 784 goto attach_err; 785 } 786 787 table = dma_buf_map_attachment_unlocked(map->attach, DMA_BIDIRECTIONAL); 788 if (IS_ERR(table)) { 789 err = PTR_ERR(table); 790 goto map_err; 791 } 792 map->table = table; 793 794 if (attr & FASTRPC_ATTR_SECUREMAP) { 795 map->phys = sg_phys(map->table->sgl); 796 } else { 797 map->phys = sg_dma_address(map->table->sgl); 798 map->phys += ((u64)fl->sctx->sid << 32); 799 } 800 map->size = len; 801 map->va = sg_virt(map->table->sgl); 802 map->len = len; 803 804 if (attr & FASTRPC_ATTR_SECUREMAP) { 805 /* 806 * If subsystem VMIDs are defined in DTSI, then do 807 * hyp_assign from HLOS to those VM(s) 808 */ 809 u64 src_perms = BIT(QCOM_SCM_VMID_HLOS); 810 struct qcom_scm_vmperm dst_perms[2] = {0}; 811 812 dst_perms[0].vmid = QCOM_SCM_VMID_HLOS; 813 dst_perms[0].perm = QCOM_SCM_PERM_RW; 814 dst_perms[1].vmid = fl->cctx->vmperms[0].vmid; 815 dst_perms[1].perm = QCOM_SCM_PERM_RWX; 816 map->attr = attr; 817 err = qcom_scm_assign_mem(map->phys, (u64)map->size, &src_perms, dst_perms, 2); 818 if (err) { 819 dev_err(sess->dev, "Failed to assign memory with phys 0x%llx size 0x%llx err %d", 820 map->phys, map->size, err); 821 goto map_err; 822 } 823 } 824 spin_lock(&fl->lock); 825 list_add_tail(&map->node, &fl->maps); 826 spin_unlock(&fl->lock); 827 *ppmap = map; 828 829 return 0; 830 831 map_err: 832 dma_buf_detach(map->buf, map->attach); 833 attach_err: 834 dma_buf_put(map->buf); 835 get_err: 836 fastrpc_map_put(map); 837 838 return err; 839 } 840 841 /* 842 * Fastrpc payload buffer with metadata looks like: 843 * 844 * >>>>>> START of METADATA <<<<<<<<< 845 * +---------------------------------+ 846 * | Arguments | 847 * | type:(union fastrpc_remote_arg)| 848 * | (0 - N) | 849 * +---------------------------------+ 850 * | Invoke Buffer list | 851 * | type:(struct fastrpc_invoke_buf)| 852 * | (0 - N) | 853 * +---------------------------------+ 854 * | Page info list | 855 * | type:(struct fastrpc_phy_page) | 856 * | (0 - N) | 857 * +---------------------------------+ 858 * | Optional info | 859 * |(can be specific to SoC/Firmware)| 860 * +---------------------------------+ 861 * >>>>>>>> END of METADATA <<<<<<<<< 862 * +---------------------------------+ 863 * | Inline ARGS | 864 * | (0-N) | 865 * +---------------------------------+ 866 */ 867 868 static int fastrpc_get_meta_size(struct fastrpc_invoke_ctx *ctx) 869 { 870 int size = 0; 871 872 size = (sizeof(struct fastrpc_remote_buf) + 873 sizeof(struct fastrpc_invoke_buf) + 874 sizeof(struct fastrpc_phy_page)) * ctx->nscalars + 875 sizeof(u64) * FASTRPC_MAX_FDLIST + 876 sizeof(u32) * FASTRPC_MAX_CRCLIST; 877 878 return size; 879 } 880 881 static u64 fastrpc_get_payload_size(struct fastrpc_invoke_ctx *ctx, int metalen) 882 { 883 u64 size = 0; 884 int oix; 885 886 size = ALIGN(metalen, FASTRPC_ALIGN); 887 for (oix = 0; oix < ctx->nbufs; oix++) { 888 int i = ctx->olaps[oix].raix; 889 890 if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1) { 891 892 if (ctx->olaps[oix].offset == 0) 893 size = ALIGN(size, FASTRPC_ALIGN); 894 895 size += (ctx->olaps[oix].mend - ctx->olaps[oix].mstart); 896 } 897 } 898 899 return size; 900 } 901 902 static int fastrpc_create_maps(struct fastrpc_invoke_ctx *ctx) 903 { 904 struct device *dev = ctx->fl->sctx->dev; 905 int i, err; 906 907 for (i = 0; i < ctx->nscalars; ++i) { 908 909 if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1 || 910 ctx->args[i].length == 0) 911 continue; 912 913 err = fastrpc_map_create(ctx->fl, ctx->args[i].fd, 914 ctx->args[i].length, ctx->args[i].attr, &ctx->maps[i]); 915 if (err) { 916 dev_err(dev, "Error Creating map %d\n", err); 917 return -EINVAL; 918 } 919 920 } 921 return 0; 922 } 923 924 static struct fastrpc_invoke_buf *fastrpc_invoke_buf_start(union fastrpc_remote_arg *pra, int len) 925 { 926 return (struct fastrpc_invoke_buf *)(&pra[len]); 927 } 928 929 static struct fastrpc_phy_page *fastrpc_phy_page_start(struct fastrpc_invoke_buf *buf, int len) 930 { 931 return (struct fastrpc_phy_page *)(&buf[len]); 932 } 933 934 static int fastrpc_get_args(u32 kernel, struct fastrpc_invoke_ctx *ctx) 935 { 936 struct device *dev = ctx->fl->sctx->dev; 937 union fastrpc_remote_arg *rpra; 938 struct fastrpc_invoke_buf *list; 939 struct fastrpc_phy_page *pages; 940 int inbufs, i, oix, err = 0; 941 u64 len, rlen, pkt_size; 942 u64 pg_start, pg_end; 943 uintptr_t args; 944 int metalen; 945 946 inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); 947 metalen = fastrpc_get_meta_size(ctx); 948 pkt_size = fastrpc_get_payload_size(ctx, metalen); 949 950 err = fastrpc_create_maps(ctx); 951 if (err) 952 return err; 953 954 ctx->msg_sz = pkt_size; 955 956 err = fastrpc_buf_alloc(ctx->fl, dev, pkt_size, &ctx->buf); 957 if (err) 958 return err; 959 960 memset(ctx->buf->virt, 0, pkt_size); 961 rpra = ctx->buf->virt; 962 list = fastrpc_invoke_buf_start(rpra, ctx->nscalars); 963 pages = fastrpc_phy_page_start(list, ctx->nscalars); 964 args = (uintptr_t)ctx->buf->virt + metalen; 965 rlen = pkt_size - metalen; 966 ctx->rpra = rpra; 967 968 for (oix = 0; oix < ctx->nbufs; ++oix) { 969 int mlen; 970 971 i = ctx->olaps[oix].raix; 972 len = ctx->args[i].length; 973 974 rpra[i].buf.pv = 0; 975 rpra[i].buf.len = len; 976 list[i].num = len ? 1 : 0; 977 list[i].pgidx = i; 978 979 if (!len) 980 continue; 981 982 if (ctx->maps[i]) { 983 struct vm_area_struct *vma = NULL; 984 985 rpra[i].buf.pv = (u64) ctx->args[i].ptr; 986 pages[i].addr = ctx->maps[i]->phys; 987 988 mmap_read_lock(current->mm); 989 vma = find_vma(current->mm, ctx->args[i].ptr); 990 if (vma) 991 pages[i].addr += ctx->args[i].ptr - 992 vma->vm_start; 993 mmap_read_unlock(current->mm); 994 995 pg_start = (ctx->args[i].ptr & PAGE_MASK) >> PAGE_SHIFT; 996 pg_end = ((ctx->args[i].ptr + len - 1) & PAGE_MASK) >> 997 PAGE_SHIFT; 998 pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; 999 1000 } else { 1001 1002 if (ctx->olaps[oix].offset == 0) { 1003 rlen -= ALIGN(args, FASTRPC_ALIGN) - args; 1004 args = ALIGN(args, FASTRPC_ALIGN); 1005 } 1006 1007 mlen = ctx->olaps[oix].mend - ctx->olaps[oix].mstart; 1008 1009 if (rlen < mlen) 1010 goto bail; 1011 1012 rpra[i].buf.pv = args - ctx->olaps[oix].offset; 1013 pages[i].addr = ctx->buf->phys - 1014 ctx->olaps[oix].offset + 1015 (pkt_size - rlen); 1016 pages[i].addr = pages[i].addr & PAGE_MASK; 1017 1018 pg_start = (args & PAGE_MASK) >> PAGE_SHIFT; 1019 pg_end = ((args + len - 1) & PAGE_MASK) >> PAGE_SHIFT; 1020 pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; 1021 args = args + mlen; 1022 rlen -= mlen; 1023 } 1024 1025 if (i < inbufs && !ctx->maps[i]) { 1026 void *dst = (void *)(uintptr_t)rpra[i].buf.pv; 1027 void *src = (void *)(uintptr_t)ctx->args[i].ptr; 1028 1029 if (!kernel) { 1030 if (copy_from_user(dst, (void __user *)src, 1031 len)) { 1032 err = -EFAULT; 1033 goto bail; 1034 } 1035 } else { 1036 memcpy(dst, src, len); 1037 } 1038 } 1039 } 1040 1041 for (i = ctx->nbufs; i < ctx->nscalars; ++i) { 1042 list[i].num = ctx->args[i].length ? 1 : 0; 1043 list[i].pgidx = i; 1044 if (ctx->maps[i]) { 1045 pages[i].addr = ctx->maps[i]->phys; 1046 pages[i].size = ctx->maps[i]->size; 1047 } 1048 rpra[i].dma.fd = ctx->args[i].fd; 1049 rpra[i].dma.len = ctx->args[i].length; 1050 rpra[i].dma.offset = (u64) ctx->args[i].ptr; 1051 } 1052 1053 bail: 1054 if (err) 1055 dev_err(dev, "Error: get invoke args failed:%d\n", err); 1056 1057 return err; 1058 } 1059 1060 static int fastrpc_put_args(struct fastrpc_invoke_ctx *ctx, 1061 u32 kernel) 1062 { 1063 union fastrpc_remote_arg *rpra = ctx->rpra; 1064 struct fastrpc_user *fl = ctx->fl; 1065 struct fastrpc_map *mmap = NULL; 1066 struct fastrpc_invoke_buf *list; 1067 struct fastrpc_phy_page *pages; 1068 u64 *fdlist; 1069 int i, inbufs, outbufs, handles; 1070 1071 inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); 1072 outbufs = REMOTE_SCALARS_OUTBUFS(ctx->sc); 1073 handles = REMOTE_SCALARS_INHANDLES(ctx->sc) + REMOTE_SCALARS_OUTHANDLES(ctx->sc); 1074 list = fastrpc_invoke_buf_start(rpra, ctx->nscalars); 1075 pages = fastrpc_phy_page_start(list, ctx->nscalars); 1076 fdlist = (uint64_t *)(pages + inbufs + outbufs + handles); 1077 1078 for (i = inbufs; i < ctx->nbufs; ++i) { 1079 if (!ctx->maps[i]) { 1080 void *src = (void *)(uintptr_t)rpra[i].buf.pv; 1081 void *dst = (void *)(uintptr_t)ctx->args[i].ptr; 1082 u64 len = rpra[i].buf.len; 1083 1084 if (!kernel) { 1085 if (copy_to_user((void __user *)dst, src, len)) 1086 return -EFAULT; 1087 } else { 1088 memcpy(dst, src, len); 1089 } 1090 } 1091 } 1092 1093 /* Clean up fdlist which is updated by DSP */ 1094 for (i = 0; i < FASTRPC_MAX_FDLIST; i++) { 1095 if (!fdlist[i]) 1096 break; 1097 if (!fastrpc_map_lookup(fl, (int)fdlist[i], &mmap, false)) 1098 fastrpc_map_put(mmap); 1099 } 1100 1101 return 0; 1102 } 1103 1104 static int fastrpc_invoke_send(struct fastrpc_session_ctx *sctx, 1105 struct fastrpc_invoke_ctx *ctx, 1106 u32 kernel, uint32_t handle) 1107 { 1108 struct fastrpc_channel_ctx *cctx; 1109 struct fastrpc_user *fl = ctx->fl; 1110 struct fastrpc_msg *msg = &ctx->msg; 1111 int ret; 1112 1113 cctx = fl->cctx; 1114 msg->pid = fl->tgid; 1115 msg->tid = current->pid; 1116 1117 if (kernel) 1118 msg->pid = 0; 1119 1120 msg->ctx = ctx->ctxid | fl->pd; 1121 msg->handle = handle; 1122 msg->sc = ctx->sc; 1123 msg->addr = ctx->buf ? ctx->buf->phys : 0; 1124 msg->size = roundup(ctx->msg_sz, PAGE_SIZE); 1125 fastrpc_context_get(ctx); 1126 1127 ret = rpmsg_send(cctx->rpdev->ept, (void *)msg, sizeof(*msg)); 1128 1129 if (ret) 1130 fastrpc_context_put(ctx); 1131 1132 return ret; 1133 1134 } 1135 1136 static int fastrpc_internal_invoke(struct fastrpc_user *fl, u32 kernel, 1137 u32 handle, u32 sc, 1138 struct fastrpc_invoke_args *args) 1139 { 1140 struct fastrpc_invoke_ctx *ctx = NULL; 1141 struct fastrpc_buf *buf, *b; 1142 1143 int err = 0; 1144 1145 if (!fl->sctx) 1146 return -EINVAL; 1147 1148 if (!fl->cctx->rpdev) 1149 return -EPIPE; 1150 1151 if (handle == FASTRPC_INIT_HANDLE && !kernel) { 1152 dev_warn_ratelimited(fl->sctx->dev, "user app trying to send a kernel RPC message (%d)\n", handle); 1153 return -EPERM; 1154 } 1155 1156 ctx = fastrpc_context_alloc(fl, kernel, sc, args); 1157 if (IS_ERR(ctx)) 1158 return PTR_ERR(ctx); 1159 1160 err = fastrpc_get_args(kernel, ctx); 1161 if (err) 1162 goto bail; 1163 1164 /* make sure that all CPU memory writes are seen by DSP */ 1165 dma_wmb(); 1166 /* Send invoke buffer to remote dsp */ 1167 err = fastrpc_invoke_send(fl->sctx, ctx, kernel, handle); 1168 if (err) 1169 goto bail; 1170 1171 if (kernel) { 1172 if (!wait_for_completion_timeout(&ctx->work, 10 * HZ)) 1173 err = -ETIMEDOUT; 1174 } else { 1175 err = wait_for_completion_interruptible(&ctx->work); 1176 } 1177 1178 if (err) 1179 goto bail; 1180 1181 /* make sure that all memory writes by DSP are seen by CPU */ 1182 dma_rmb(); 1183 /* populate all the output buffers with results */ 1184 err = fastrpc_put_args(ctx, kernel); 1185 if (err) 1186 goto bail; 1187 1188 /* Check the response from remote dsp */ 1189 err = ctx->retval; 1190 if (err) 1191 goto bail; 1192 1193 bail: 1194 if (err != -ERESTARTSYS && err != -ETIMEDOUT) { 1195 /* We are done with this compute context */ 1196 spin_lock(&fl->lock); 1197 list_del(&ctx->node); 1198 spin_unlock(&fl->lock); 1199 fastrpc_context_put(ctx); 1200 } 1201 1202 if (err == -ERESTARTSYS) { 1203 list_for_each_entry_safe(buf, b, &fl->mmaps, node) { 1204 list_del(&buf->node); 1205 list_add_tail(&buf->node, &fl->cctx->invoke_interrupted_mmaps); 1206 } 1207 } 1208 1209 if (err) 1210 dev_dbg(fl->sctx->dev, "Error: Invoke Failed %d\n", err); 1211 1212 return err; 1213 } 1214 1215 static bool is_session_rejected(struct fastrpc_user *fl, bool unsigned_pd_request) 1216 { 1217 /* Check if the device node is non-secure and channel is secure*/ 1218 if (!fl->is_secure_dev && fl->cctx->secure) { 1219 /* 1220 * Allow untrusted applications to offload only to Unsigned PD when 1221 * channel is configured as secure and block untrusted apps on channel 1222 * that does not support unsigned PD offload 1223 */ 1224 if (!fl->cctx->unsigned_support || !unsigned_pd_request) { 1225 dev_err(&fl->cctx->rpdev->dev, "Error: Untrusted application trying to offload to signed PD"); 1226 return true; 1227 } 1228 } 1229 1230 return false; 1231 } 1232 1233 static int fastrpc_init_create_static_process(struct fastrpc_user *fl, 1234 char __user *argp) 1235 { 1236 struct fastrpc_init_create_static init; 1237 struct fastrpc_invoke_args *args; 1238 struct fastrpc_phy_page pages[1]; 1239 char *name; 1240 int err; 1241 bool scm_done = false; 1242 struct { 1243 int pgid; 1244 u32 namelen; 1245 u32 pageslen; 1246 } inbuf; 1247 u32 sc; 1248 1249 args = kcalloc(FASTRPC_CREATE_STATIC_PROCESS_NARGS, sizeof(*args), GFP_KERNEL); 1250 if (!args) 1251 return -ENOMEM; 1252 1253 if (copy_from_user(&init, argp, sizeof(init))) { 1254 err = -EFAULT; 1255 goto err; 1256 } 1257 1258 if (init.namelen > INIT_FILE_NAMELEN_MAX) { 1259 err = -EINVAL; 1260 goto err; 1261 } 1262 1263 name = kzalloc(init.namelen, GFP_KERNEL); 1264 if (!name) { 1265 err = -ENOMEM; 1266 goto err; 1267 } 1268 1269 if (copy_from_user(name, (void __user *)(uintptr_t)init.name, init.namelen)) { 1270 err = -EFAULT; 1271 goto err_name; 1272 } 1273 1274 if (!fl->cctx->remote_heap) { 1275 err = fastrpc_remote_heap_alloc(fl, fl->sctx->dev, init.memlen, 1276 &fl->cctx->remote_heap); 1277 if (err) 1278 goto err_name; 1279 1280 /* Map if we have any heap VMIDs associated with this ADSP Static Process. */ 1281 if (fl->cctx->vmcount) { 1282 u64 src_perms = BIT(QCOM_SCM_VMID_HLOS); 1283 1284 err = qcom_scm_assign_mem(fl->cctx->remote_heap->phys, 1285 (u64)fl->cctx->remote_heap->size, 1286 &src_perms, 1287 fl->cctx->vmperms, fl->cctx->vmcount); 1288 if (err) { 1289 dev_err(fl->sctx->dev, "Failed to assign memory with phys 0x%llx size 0x%llx err %d", 1290 fl->cctx->remote_heap->phys, fl->cctx->remote_heap->size, err); 1291 goto err_map; 1292 } 1293 scm_done = true; 1294 } 1295 } 1296 1297 inbuf.pgid = fl->tgid; 1298 inbuf.namelen = init.namelen; 1299 inbuf.pageslen = 0; 1300 fl->pd = USER_PD; 1301 1302 args[0].ptr = (u64)(uintptr_t)&inbuf; 1303 args[0].length = sizeof(inbuf); 1304 args[0].fd = -1; 1305 1306 args[1].ptr = (u64)(uintptr_t)name; 1307 args[1].length = inbuf.namelen; 1308 args[1].fd = -1; 1309 1310 pages[0].addr = fl->cctx->remote_heap->phys; 1311 pages[0].size = fl->cctx->remote_heap->size; 1312 1313 args[2].ptr = (u64)(uintptr_t) pages; 1314 args[2].length = sizeof(*pages); 1315 args[2].fd = -1; 1316 1317 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE_STATIC, 3, 0); 1318 1319 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1320 sc, args); 1321 if (err) 1322 goto err_invoke; 1323 1324 kfree(args); 1325 kfree(name); 1326 1327 return 0; 1328 err_invoke: 1329 if (fl->cctx->vmcount && scm_done) { 1330 u64 src_perms = 0; 1331 struct qcom_scm_vmperm dst_perms; 1332 u32 i; 1333 1334 for (i = 0; i < fl->cctx->vmcount; i++) 1335 src_perms |= BIT(fl->cctx->vmperms[i].vmid); 1336 1337 dst_perms.vmid = QCOM_SCM_VMID_HLOS; 1338 dst_perms.perm = QCOM_SCM_PERM_RWX; 1339 err = qcom_scm_assign_mem(fl->cctx->remote_heap->phys, 1340 (u64)fl->cctx->remote_heap->size, 1341 &src_perms, &dst_perms, 1); 1342 if (err) 1343 dev_err(fl->sctx->dev, "Failed to assign memory phys 0x%llx size 0x%llx err %d", 1344 fl->cctx->remote_heap->phys, fl->cctx->remote_heap->size, err); 1345 } 1346 err_map: 1347 fastrpc_buf_free(fl->cctx->remote_heap); 1348 err_name: 1349 kfree(name); 1350 err: 1351 kfree(args); 1352 1353 return err; 1354 } 1355 1356 static int fastrpc_init_create_process(struct fastrpc_user *fl, 1357 char __user *argp) 1358 { 1359 struct fastrpc_init_create init; 1360 struct fastrpc_invoke_args *args; 1361 struct fastrpc_phy_page pages[1]; 1362 struct fastrpc_map *map = NULL; 1363 struct fastrpc_buf *imem = NULL; 1364 int memlen; 1365 int err; 1366 struct { 1367 int pgid; 1368 u32 namelen; 1369 u32 filelen; 1370 u32 pageslen; 1371 u32 attrs; 1372 u32 siglen; 1373 } inbuf; 1374 u32 sc; 1375 bool unsigned_module = false; 1376 1377 args = kcalloc(FASTRPC_CREATE_PROCESS_NARGS, sizeof(*args), GFP_KERNEL); 1378 if (!args) 1379 return -ENOMEM; 1380 1381 if (copy_from_user(&init, argp, sizeof(init))) { 1382 err = -EFAULT; 1383 goto err; 1384 } 1385 1386 if (init.attrs & FASTRPC_MODE_UNSIGNED_MODULE) 1387 unsigned_module = true; 1388 1389 if (is_session_rejected(fl, unsigned_module)) { 1390 err = -ECONNREFUSED; 1391 goto err; 1392 } 1393 1394 if (init.filelen > INIT_FILELEN_MAX) { 1395 err = -EINVAL; 1396 goto err; 1397 } 1398 1399 inbuf.pgid = fl->tgid; 1400 inbuf.namelen = strlen(current->comm) + 1; 1401 inbuf.filelen = init.filelen; 1402 inbuf.pageslen = 1; 1403 inbuf.attrs = init.attrs; 1404 inbuf.siglen = init.siglen; 1405 fl->pd = USER_PD; 1406 1407 if (init.filelen && init.filefd) { 1408 err = fastrpc_map_create(fl, init.filefd, init.filelen, 0, &map); 1409 if (err) 1410 goto err; 1411 } 1412 1413 memlen = ALIGN(max(INIT_FILELEN_MAX, (int)init.filelen * 4), 1414 1024 * 1024); 1415 err = fastrpc_buf_alloc(fl, fl->sctx->dev, memlen, 1416 &imem); 1417 if (err) 1418 goto err_alloc; 1419 1420 fl->init_mem = imem; 1421 args[0].ptr = (u64)(uintptr_t)&inbuf; 1422 args[0].length = sizeof(inbuf); 1423 args[0].fd = -1; 1424 1425 args[1].ptr = (u64)(uintptr_t)current->comm; 1426 args[1].length = inbuf.namelen; 1427 args[1].fd = -1; 1428 1429 args[2].ptr = (u64) init.file; 1430 args[2].length = inbuf.filelen; 1431 args[2].fd = init.filefd; 1432 1433 pages[0].addr = imem->phys; 1434 pages[0].size = imem->size; 1435 1436 args[3].ptr = (u64)(uintptr_t) pages; 1437 args[3].length = 1 * sizeof(*pages); 1438 args[3].fd = -1; 1439 1440 args[4].ptr = (u64)(uintptr_t)&inbuf.attrs; 1441 args[4].length = sizeof(inbuf.attrs); 1442 args[4].fd = -1; 1443 1444 args[5].ptr = (u64)(uintptr_t) &inbuf.siglen; 1445 args[5].length = sizeof(inbuf.siglen); 1446 args[5].fd = -1; 1447 1448 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE, 4, 0); 1449 if (init.attrs) 1450 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE_ATTR, 4, 0); 1451 1452 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1453 sc, args); 1454 if (err) 1455 goto err_invoke; 1456 1457 kfree(args); 1458 1459 return 0; 1460 1461 err_invoke: 1462 fl->init_mem = NULL; 1463 fastrpc_buf_free(imem); 1464 err_alloc: 1465 fastrpc_map_put(map); 1466 err: 1467 kfree(args); 1468 1469 return err; 1470 } 1471 1472 static struct fastrpc_session_ctx *fastrpc_session_alloc( 1473 struct fastrpc_channel_ctx *cctx) 1474 { 1475 struct fastrpc_session_ctx *session = NULL; 1476 unsigned long flags; 1477 int i; 1478 1479 spin_lock_irqsave(&cctx->lock, flags); 1480 for (i = 0; i < cctx->sesscount; i++) { 1481 if (!cctx->session[i].used && cctx->session[i].valid) { 1482 cctx->session[i].used = true; 1483 session = &cctx->session[i]; 1484 break; 1485 } 1486 } 1487 spin_unlock_irqrestore(&cctx->lock, flags); 1488 1489 return session; 1490 } 1491 1492 static void fastrpc_session_free(struct fastrpc_channel_ctx *cctx, 1493 struct fastrpc_session_ctx *session) 1494 { 1495 unsigned long flags; 1496 1497 spin_lock_irqsave(&cctx->lock, flags); 1498 session->used = false; 1499 spin_unlock_irqrestore(&cctx->lock, flags); 1500 } 1501 1502 static int fastrpc_release_current_dsp_process(struct fastrpc_user *fl) 1503 { 1504 struct fastrpc_invoke_args args[1]; 1505 int tgid = 0; 1506 u32 sc; 1507 1508 tgid = fl->tgid; 1509 args[0].ptr = (u64)(uintptr_t) &tgid; 1510 args[0].length = sizeof(tgid); 1511 args[0].fd = -1; 1512 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_RELEASE, 1, 0); 1513 1514 return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1515 sc, &args[0]); 1516 } 1517 1518 static int fastrpc_device_release(struct inode *inode, struct file *file) 1519 { 1520 struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; 1521 struct fastrpc_channel_ctx *cctx = fl->cctx; 1522 struct fastrpc_invoke_ctx *ctx, *n; 1523 struct fastrpc_map *map, *m; 1524 struct fastrpc_buf *buf, *b; 1525 unsigned long flags; 1526 1527 fastrpc_release_current_dsp_process(fl); 1528 1529 spin_lock_irqsave(&cctx->lock, flags); 1530 list_del(&fl->user); 1531 spin_unlock_irqrestore(&cctx->lock, flags); 1532 1533 if (fl->init_mem) 1534 fastrpc_buf_free(fl->init_mem); 1535 1536 list_for_each_entry_safe(ctx, n, &fl->pending, node) { 1537 list_del(&ctx->node); 1538 fastrpc_context_put(ctx); 1539 } 1540 1541 list_for_each_entry_safe(map, m, &fl->maps, node) 1542 fastrpc_map_put(map); 1543 1544 list_for_each_entry_safe(buf, b, &fl->mmaps, node) { 1545 list_del(&buf->node); 1546 fastrpc_buf_free(buf); 1547 } 1548 1549 fastrpc_session_free(cctx, fl->sctx); 1550 fastrpc_channel_ctx_put(cctx); 1551 1552 mutex_destroy(&fl->mutex); 1553 kfree(fl); 1554 file->private_data = NULL; 1555 1556 return 0; 1557 } 1558 1559 static int fastrpc_device_open(struct inode *inode, struct file *filp) 1560 { 1561 struct fastrpc_channel_ctx *cctx; 1562 struct fastrpc_device *fdevice; 1563 struct fastrpc_user *fl = NULL; 1564 unsigned long flags; 1565 1566 fdevice = miscdev_to_fdevice(filp->private_data); 1567 cctx = fdevice->cctx; 1568 1569 fl = kzalloc(sizeof(*fl), GFP_KERNEL); 1570 if (!fl) 1571 return -ENOMEM; 1572 1573 /* Released in fastrpc_device_release() */ 1574 fastrpc_channel_ctx_get(cctx); 1575 1576 filp->private_data = fl; 1577 spin_lock_init(&fl->lock); 1578 mutex_init(&fl->mutex); 1579 INIT_LIST_HEAD(&fl->pending); 1580 INIT_LIST_HEAD(&fl->maps); 1581 INIT_LIST_HEAD(&fl->mmaps); 1582 INIT_LIST_HEAD(&fl->user); 1583 fl->tgid = current->tgid; 1584 fl->cctx = cctx; 1585 fl->is_secure_dev = fdevice->secure; 1586 1587 fl->sctx = fastrpc_session_alloc(cctx); 1588 if (!fl->sctx) { 1589 dev_err(&cctx->rpdev->dev, "No session available\n"); 1590 mutex_destroy(&fl->mutex); 1591 kfree(fl); 1592 1593 return -EBUSY; 1594 } 1595 1596 spin_lock_irqsave(&cctx->lock, flags); 1597 list_add_tail(&fl->user, &cctx->users); 1598 spin_unlock_irqrestore(&cctx->lock, flags); 1599 1600 return 0; 1601 } 1602 1603 static int fastrpc_dmabuf_alloc(struct fastrpc_user *fl, char __user *argp) 1604 { 1605 struct fastrpc_alloc_dma_buf bp; 1606 DEFINE_DMA_BUF_EXPORT_INFO(exp_info); 1607 struct fastrpc_buf *buf = NULL; 1608 int err; 1609 1610 if (copy_from_user(&bp, argp, sizeof(bp))) 1611 return -EFAULT; 1612 1613 err = fastrpc_buf_alloc(fl, fl->sctx->dev, bp.size, &buf); 1614 if (err) 1615 return err; 1616 exp_info.ops = &fastrpc_dma_buf_ops; 1617 exp_info.size = bp.size; 1618 exp_info.flags = O_RDWR; 1619 exp_info.priv = buf; 1620 buf->dmabuf = dma_buf_export(&exp_info); 1621 if (IS_ERR(buf->dmabuf)) { 1622 err = PTR_ERR(buf->dmabuf); 1623 fastrpc_buf_free(buf); 1624 return err; 1625 } 1626 1627 bp.fd = dma_buf_fd(buf->dmabuf, O_ACCMODE); 1628 if (bp.fd < 0) { 1629 dma_buf_put(buf->dmabuf); 1630 return -EINVAL; 1631 } 1632 1633 if (copy_to_user(argp, &bp, sizeof(bp))) { 1634 /* 1635 * The usercopy failed, but we can't do much about it, as 1636 * dma_buf_fd() already called fd_install() and made the 1637 * file descriptor accessible for the current process. It 1638 * might already be closed and dmabuf no longer valid when 1639 * we reach this point. Therefore "leak" the fd and rely on 1640 * the process exit path to do any required cleanup. 1641 */ 1642 return -EFAULT; 1643 } 1644 1645 return 0; 1646 } 1647 1648 static int fastrpc_init_attach(struct fastrpc_user *fl, int pd) 1649 { 1650 struct fastrpc_invoke_args args[1]; 1651 int tgid = fl->tgid; 1652 u32 sc; 1653 1654 args[0].ptr = (u64)(uintptr_t) &tgid; 1655 args[0].length = sizeof(tgid); 1656 args[0].fd = -1; 1657 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_ATTACH, 1, 0); 1658 fl->pd = pd; 1659 1660 return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1661 sc, &args[0]); 1662 } 1663 1664 static int fastrpc_invoke(struct fastrpc_user *fl, char __user *argp) 1665 { 1666 struct fastrpc_invoke_args *args = NULL; 1667 struct fastrpc_invoke inv; 1668 u32 nscalars; 1669 int err; 1670 1671 if (copy_from_user(&inv, argp, sizeof(inv))) 1672 return -EFAULT; 1673 1674 /* nscalars is truncated here to max supported value */ 1675 nscalars = REMOTE_SCALARS_LENGTH(inv.sc); 1676 if (nscalars) { 1677 args = kcalloc(nscalars, sizeof(*args), GFP_KERNEL); 1678 if (!args) 1679 return -ENOMEM; 1680 1681 if (copy_from_user(args, (void __user *)(uintptr_t)inv.args, 1682 nscalars * sizeof(*args))) { 1683 kfree(args); 1684 return -EFAULT; 1685 } 1686 } 1687 1688 err = fastrpc_internal_invoke(fl, false, inv.handle, inv.sc, args); 1689 kfree(args); 1690 1691 return err; 1692 } 1693 1694 static int fastrpc_get_info_from_dsp(struct fastrpc_user *fl, uint32_t *dsp_attr_buf, 1695 uint32_t dsp_attr_buf_len) 1696 { 1697 struct fastrpc_invoke_args args[2] = { 0 }; 1698 1699 /* 1700 * Capability filled in userspace. This carries the information 1701 * about the remoteproc support which is fetched from the remoteproc 1702 * sysfs node by userspace. 1703 */ 1704 dsp_attr_buf[0] = 0; 1705 dsp_attr_buf_len -= 1; 1706 1707 args[0].ptr = (u64)(uintptr_t)&dsp_attr_buf_len; 1708 args[0].length = sizeof(dsp_attr_buf_len); 1709 args[0].fd = -1; 1710 args[1].ptr = (u64)(uintptr_t)&dsp_attr_buf[1]; 1711 args[1].length = dsp_attr_buf_len * sizeof(u32); 1712 args[1].fd = -1; 1713 1714 return fastrpc_internal_invoke(fl, true, FASTRPC_DSP_UTILITIES_HANDLE, 1715 FASTRPC_SCALARS(0, 1, 1), args); 1716 } 1717 1718 static int fastrpc_get_info_from_kernel(struct fastrpc_ioctl_capability *cap, 1719 struct fastrpc_user *fl) 1720 { 1721 struct fastrpc_channel_ctx *cctx = fl->cctx; 1722 uint32_t attribute_id = cap->attribute_id; 1723 uint32_t *dsp_attributes; 1724 unsigned long flags; 1725 uint32_t domain = cap->domain; 1726 int err; 1727 1728 spin_lock_irqsave(&cctx->lock, flags); 1729 /* check if we already have queried dsp for attributes */ 1730 if (cctx->valid_attributes) { 1731 spin_unlock_irqrestore(&cctx->lock, flags); 1732 goto done; 1733 } 1734 spin_unlock_irqrestore(&cctx->lock, flags); 1735 1736 dsp_attributes = kzalloc(FASTRPC_MAX_DSP_ATTRIBUTES_LEN, GFP_KERNEL); 1737 if (!dsp_attributes) 1738 return -ENOMEM; 1739 1740 err = fastrpc_get_info_from_dsp(fl, dsp_attributes, FASTRPC_MAX_DSP_ATTRIBUTES); 1741 if (err == DSP_UNSUPPORTED_API) { 1742 dev_info(&cctx->rpdev->dev, 1743 "Warning: DSP capabilities not supported on domain: %d\n", domain); 1744 kfree(dsp_attributes); 1745 return -EOPNOTSUPP; 1746 } else if (err) { 1747 dev_err(&cctx->rpdev->dev, "Error: dsp information is incorrect err: %d\n", err); 1748 kfree(dsp_attributes); 1749 return err; 1750 } 1751 1752 spin_lock_irqsave(&cctx->lock, flags); 1753 memcpy(cctx->dsp_attributes, dsp_attributes, FASTRPC_MAX_DSP_ATTRIBUTES_LEN); 1754 cctx->valid_attributes = true; 1755 spin_unlock_irqrestore(&cctx->lock, flags); 1756 kfree(dsp_attributes); 1757 done: 1758 cap->capability = cctx->dsp_attributes[attribute_id]; 1759 return 0; 1760 } 1761 1762 static int fastrpc_get_dsp_info(struct fastrpc_user *fl, char __user *argp) 1763 { 1764 struct fastrpc_ioctl_capability cap = {0}; 1765 int err = 0; 1766 1767 if (copy_from_user(&cap, argp, sizeof(cap))) 1768 return -EFAULT; 1769 1770 cap.capability = 0; 1771 if (cap.domain >= FASTRPC_DEV_MAX) { 1772 dev_err(&fl->cctx->rpdev->dev, "Error: Invalid domain id:%d, err:%d\n", 1773 cap.domain, err); 1774 return -ECHRNG; 1775 } 1776 1777 /* Fastrpc Capablities does not support modem domain */ 1778 if (cap.domain == MDSP_DOMAIN_ID) { 1779 dev_err(&fl->cctx->rpdev->dev, "Error: modem not supported %d\n", err); 1780 return -ECHRNG; 1781 } 1782 1783 if (cap.attribute_id >= FASTRPC_MAX_DSP_ATTRIBUTES) { 1784 dev_err(&fl->cctx->rpdev->dev, "Error: invalid attribute: %d, err: %d\n", 1785 cap.attribute_id, err); 1786 return -EOVERFLOW; 1787 } 1788 1789 err = fastrpc_get_info_from_kernel(&cap, fl); 1790 if (err) 1791 return err; 1792 1793 if (copy_to_user(argp, &cap, sizeof(cap))) 1794 return -EFAULT; 1795 1796 return 0; 1797 } 1798 1799 static int fastrpc_req_munmap_impl(struct fastrpc_user *fl, struct fastrpc_buf *buf) 1800 { 1801 struct fastrpc_invoke_args args[1] = { [0] = { 0 } }; 1802 struct fastrpc_munmap_req_msg req_msg; 1803 struct device *dev = fl->sctx->dev; 1804 int err; 1805 u32 sc; 1806 1807 req_msg.pgid = fl->tgid; 1808 req_msg.size = buf->size; 1809 req_msg.vaddr = buf->raddr; 1810 1811 args[0].ptr = (u64) (uintptr_t) &req_msg; 1812 args[0].length = sizeof(req_msg); 1813 1814 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MUNMAP, 1, 0); 1815 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, 1816 &args[0]); 1817 if (!err) { 1818 dev_dbg(dev, "unmmap\tpt 0x%09lx OK\n", buf->raddr); 1819 spin_lock(&fl->lock); 1820 list_del(&buf->node); 1821 spin_unlock(&fl->lock); 1822 fastrpc_buf_free(buf); 1823 } else { 1824 dev_err(dev, "unmmap\tpt 0x%09lx ERROR\n", buf->raddr); 1825 } 1826 1827 return err; 1828 } 1829 1830 static int fastrpc_req_munmap(struct fastrpc_user *fl, char __user *argp) 1831 { 1832 struct fastrpc_buf *buf = NULL, *iter, *b; 1833 struct fastrpc_req_munmap req; 1834 struct device *dev = fl->sctx->dev; 1835 1836 if (copy_from_user(&req, argp, sizeof(req))) 1837 return -EFAULT; 1838 1839 spin_lock(&fl->lock); 1840 list_for_each_entry_safe(iter, b, &fl->mmaps, node) { 1841 if ((iter->raddr == req.vaddrout) && (iter->size == req.size)) { 1842 buf = iter; 1843 break; 1844 } 1845 } 1846 spin_unlock(&fl->lock); 1847 1848 if (!buf) { 1849 dev_err(dev, "mmap\t\tpt 0x%09llx [len 0x%08llx] not in list\n", 1850 req.vaddrout, req.size); 1851 return -EINVAL; 1852 } 1853 1854 return fastrpc_req_munmap_impl(fl, buf); 1855 } 1856 1857 static int fastrpc_req_mmap(struct fastrpc_user *fl, char __user *argp) 1858 { 1859 struct fastrpc_invoke_args args[3] = { [0 ... 2] = { 0 } }; 1860 struct fastrpc_buf *buf = NULL; 1861 struct fastrpc_mmap_req_msg req_msg; 1862 struct fastrpc_mmap_rsp_msg rsp_msg; 1863 struct fastrpc_phy_page pages; 1864 struct fastrpc_req_mmap req; 1865 struct device *dev = fl->sctx->dev; 1866 int err; 1867 u32 sc; 1868 1869 if (copy_from_user(&req, argp, sizeof(req))) 1870 return -EFAULT; 1871 1872 if (req.flags != ADSP_MMAP_ADD_PAGES && req.flags != ADSP_MMAP_REMOTE_HEAP_ADDR) { 1873 dev_err(dev, "flag not supported 0x%x\n", req.flags); 1874 1875 return -EINVAL; 1876 } 1877 1878 if (req.vaddrin) { 1879 dev_err(dev, "adding user allocated pages is not supported\n"); 1880 return -EINVAL; 1881 } 1882 1883 if (req.flags == ADSP_MMAP_REMOTE_HEAP_ADDR) 1884 err = fastrpc_remote_heap_alloc(fl, dev, req.size, &buf); 1885 else 1886 err = fastrpc_buf_alloc(fl, dev, req.size, &buf); 1887 1888 if (err) { 1889 dev_err(dev, "failed to allocate buffer\n"); 1890 return err; 1891 } 1892 1893 req_msg.pgid = fl->tgid; 1894 req_msg.flags = req.flags; 1895 req_msg.vaddr = req.vaddrin; 1896 req_msg.num = sizeof(pages); 1897 1898 args[0].ptr = (u64) (uintptr_t) &req_msg; 1899 args[0].length = sizeof(req_msg); 1900 1901 pages.addr = buf->phys; 1902 pages.size = buf->size; 1903 1904 args[1].ptr = (u64) (uintptr_t) &pages; 1905 args[1].length = sizeof(pages); 1906 1907 args[2].ptr = (u64) (uintptr_t) &rsp_msg; 1908 args[2].length = sizeof(rsp_msg); 1909 1910 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MMAP, 2, 1); 1911 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, 1912 &args[0]); 1913 if (err) { 1914 dev_err(dev, "mmap error (len 0x%08llx)\n", buf->size); 1915 goto err_invoke; 1916 } 1917 1918 /* update the buffer to be able to deallocate the memory on the DSP */ 1919 buf->raddr = (uintptr_t) rsp_msg.vaddr; 1920 1921 /* let the client know the address to use */ 1922 req.vaddrout = rsp_msg.vaddr; 1923 1924 /* Add memory to static PD pool, protection thru hypervisor */ 1925 if (req.flags == ADSP_MMAP_REMOTE_HEAP_ADDR && fl->cctx->vmcount) { 1926 u64 src_perms = BIT(QCOM_SCM_VMID_HLOS); 1927 1928 err = qcom_scm_assign_mem(buf->phys, (u64)buf->size, 1929 &src_perms, fl->cctx->vmperms, fl->cctx->vmcount); 1930 if (err) { 1931 dev_err(fl->sctx->dev, "Failed to assign memory phys 0x%llx size 0x%llx err %d", 1932 buf->phys, buf->size, err); 1933 goto err_assign; 1934 } 1935 } 1936 1937 spin_lock(&fl->lock); 1938 list_add_tail(&buf->node, &fl->mmaps); 1939 spin_unlock(&fl->lock); 1940 1941 if (copy_to_user((void __user *)argp, &req, sizeof(req))) { 1942 err = -EFAULT; 1943 goto err_assign; 1944 } 1945 1946 dev_dbg(dev, "mmap\t\tpt 0x%09lx OK [len 0x%08llx]\n", 1947 buf->raddr, buf->size); 1948 1949 return 0; 1950 1951 err_assign: 1952 fastrpc_req_munmap_impl(fl, buf); 1953 err_invoke: 1954 fastrpc_buf_free(buf); 1955 1956 return err; 1957 } 1958 1959 static int fastrpc_req_mem_unmap_impl(struct fastrpc_user *fl, struct fastrpc_mem_unmap *req) 1960 { 1961 struct fastrpc_invoke_args args[1] = { [0] = { 0 } }; 1962 struct fastrpc_map *map = NULL, *iter, *m; 1963 struct fastrpc_mem_unmap_req_msg req_msg = { 0 }; 1964 int err = 0; 1965 u32 sc; 1966 struct device *dev = fl->sctx->dev; 1967 1968 spin_lock(&fl->lock); 1969 list_for_each_entry_safe(iter, m, &fl->maps, node) { 1970 if ((req->fd < 0 || iter->fd == req->fd) && (iter->raddr == req->vaddr)) { 1971 map = iter; 1972 break; 1973 } 1974 } 1975 1976 spin_unlock(&fl->lock); 1977 1978 if (!map) { 1979 dev_err(dev, "map not in list\n"); 1980 return -EINVAL; 1981 } 1982 1983 req_msg.pgid = fl->tgid; 1984 req_msg.len = map->len; 1985 req_msg.vaddrin = map->raddr; 1986 req_msg.fd = map->fd; 1987 1988 args[0].ptr = (u64) (uintptr_t) &req_msg; 1989 args[0].length = sizeof(req_msg); 1990 1991 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MEM_UNMAP, 1, 0); 1992 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, 1993 &args[0]); 1994 if (err) { 1995 dev_err(dev, "unmmap\tpt fd = %d, 0x%09llx error\n", map->fd, map->raddr); 1996 return err; 1997 } 1998 fastrpc_map_put(map); 1999 2000 return 0; 2001 } 2002 2003 static int fastrpc_req_mem_unmap(struct fastrpc_user *fl, char __user *argp) 2004 { 2005 struct fastrpc_mem_unmap req; 2006 2007 if (copy_from_user(&req, argp, sizeof(req))) 2008 return -EFAULT; 2009 2010 return fastrpc_req_mem_unmap_impl(fl, &req); 2011 } 2012 2013 static int fastrpc_req_mem_map(struct fastrpc_user *fl, char __user *argp) 2014 { 2015 struct fastrpc_invoke_args args[4] = { [0 ... 3] = { 0 } }; 2016 struct fastrpc_mem_map_req_msg req_msg = { 0 }; 2017 struct fastrpc_mmap_rsp_msg rsp_msg = { 0 }; 2018 struct fastrpc_mem_unmap req_unmap = { 0 }; 2019 struct fastrpc_phy_page pages = { 0 }; 2020 struct fastrpc_mem_map req; 2021 struct device *dev = fl->sctx->dev; 2022 struct fastrpc_map *map = NULL; 2023 int err; 2024 u32 sc; 2025 2026 if (copy_from_user(&req, argp, sizeof(req))) 2027 return -EFAULT; 2028 2029 /* create SMMU mapping */ 2030 err = fastrpc_map_create(fl, req.fd, req.length, 0, &map); 2031 if (err) { 2032 dev_err(dev, "failed to map buffer, fd = %d\n", req.fd); 2033 return err; 2034 } 2035 2036 req_msg.pgid = fl->tgid; 2037 req_msg.fd = req.fd; 2038 req_msg.offset = req.offset; 2039 req_msg.vaddrin = req.vaddrin; 2040 map->va = (void *) (uintptr_t) req.vaddrin; 2041 req_msg.flags = req.flags; 2042 req_msg.num = sizeof(pages); 2043 req_msg.data_len = 0; 2044 2045 args[0].ptr = (u64) (uintptr_t) &req_msg; 2046 args[0].length = sizeof(req_msg); 2047 2048 pages.addr = map->phys; 2049 pages.size = map->size; 2050 2051 args[1].ptr = (u64) (uintptr_t) &pages; 2052 args[1].length = sizeof(pages); 2053 2054 args[2].ptr = (u64) (uintptr_t) &pages; 2055 args[2].length = 0; 2056 2057 args[3].ptr = (u64) (uintptr_t) &rsp_msg; 2058 args[3].length = sizeof(rsp_msg); 2059 2060 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MEM_MAP, 3, 1); 2061 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, &args[0]); 2062 if (err) { 2063 dev_err(dev, "mem mmap error, fd %d, vaddr %llx, size %lld\n", 2064 req.fd, req.vaddrin, map->size); 2065 goto err_invoke; 2066 } 2067 2068 /* update the buffer to be able to deallocate the memory on the DSP */ 2069 map->raddr = rsp_msg.vaddr; 2070 2071 /* let the client know the address to use */ 2072 req.vaddrout = rsp_msg.vaddr; 2073 2074 if (copy_to_user((void __user *)argp, &req, sizeof(req))) { 2075 /* unmap the memory and release the buffer */ 2076 req_unmap.vaddr = (uintptr_t) rsp_msg.vaddr; 2077 req_unmap.length = map->size; 2078 fastrpc_req_mem_unmap_impl(fl, &req_unmap); 2079 return -EFAULT; 2080 } 2081 2082 return 0; 2083 2084 err_invoke: 2085 fastrpc_map_put(map); 2086 2087 return err; 2088 } 2089 2090 static int is_attach_rejected(struct fastrpc_user *fl) 2091 { 2092 /* Check if the device node is non-secure */ 2093 if (!fl->is_secure_dev) { 2094 dev_dbg(&fl->cctx->rpdev->dev, "untrusted app trying to attach to privileged DSP PD\n"); 2095 return -EACCES; 2096 } 2097 return 0; 2098 } 2099 2100 static long fastrpc_device_ioctl(struct file *file, unsigned int cmd, 2101 unsigned long arg) 2102 { 2103 struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; 2104 char __user *argp = (char __user *)arg; 2105 int err; 2106 2107 switch (cmd) { 2108 case FASTRPC_IOCTL_INVOKE: 2109 err = fastrpc_invoke(fl, argp); 2110 break; 2111 case FASTRPC_IOCTL_INIT_ATTACH: 2112 err = is_attach_rejected(fl); 2113 if (!err) 2114 err = fastrpc_init_attach(fl, ROOT_PD); 2115 break; 2116 case FASTRPC_IOCTL_INIT_ATTACH_SNS: 2117 err = is_attach_rejected(fl); 2118 if (!err) 2119 err = fastrpc_init_attach(fl, SENSORS_PD); 2120 break; 2121 case FASTRPC_IOCTL_INIT_CREATE_STATIC: 2122 err = is_attach_rejected(fl); 2123 if (!err) 2124 err = fastrpc_init_create_static_process(fl, argp); 2125 break; 2126 case FASTRPC_IOCTL_INIT_CREATE: 2127 err = fastrpc_init_create_process(fl, argp); 2128 break; 2129 case FASTRPC_IOCTL_ALLOC_DMA_BUFF: 2130 err = fastrpc_dmabuf_alloc(fl, argp); 2131 break; 2132 case FASTRPC_IOCTL_MMAP: 2133 err = fastrpc_req_mmap(fl, argp); 2134 break; 2135 case FASTRPC_IOCTL_MUNMAP: 2136 err = fastrpc_req_munmap(fl, argp); 2137 break; 2138 case FASTRPC_IOCTL_MEM_MAP: 2139 err = fastrpc_req_mem_map(fl, argp); 2140 break; 2141 case FASTRPC_IOCTL_MEM_UNMAP: 2142 err = fastrpc_req_mem_unmap(fl, argp); 2143 break; 2144 case FASTRPC_IOCTL_GET_DSP_INFO: 2145 err = fastrpc_get_dsp_info(fl, argp); 2146 break; 2147 default: 2148 err = -ENOTTY; 2149 break; 2150 } 2151 2152 return err; 2153 } 2154 2155 static const struct file_operations fastrpc_fops = { 2156 .open = fastrpc_device_open, 2157 .release = fastrpc_device_release, 2158 .unlocked_ioctl = fastrpc_device_ioctl, 2159 .compat_ioctl = fastrpc_device_ioctl, 2160 }; 2161 2162 static int fastrpc_cb_probe(struct platform_device *pdev) 2163 { 2164 struct fastrpc_channel_ctx *cctx; 2165 struct fastrpc_session_ctx *sess; 2166 struct device *dev = &pdev->dev; 2167 int i, sessions = 0; 2168 unsigned long flags; 2169 int rc; 2170 2171 cctx = dev_get_drvdata(dev->parent); 2172 if (!cctx) 2173 return -EINVAL; 2174 2175 of_property_read_u32(dev->of_node, "qcom,nsessions", &sessions); 2176 2177 spin_lock_irqsave(&cctx->lock, flags); 2178 if (cctx->sesscount >= FASTRPC_MAX_SESSIONS) { 2179 dev_err(&pdev->dev, "too many sessions\n"); 2180 spin_unlock_irqrestore(&cctx->lock, flags); 2181 return -ENOSPC; 2182 } 2183 sess = &cctx->session[cctx->sesscount++]; 2184 sess->used = false; 2185 sess->valid = true; 2186 sess->dev = dev; 2187 dev_set_drvdata(dev, sess); 2188 2189 if (of_property_read_u32(dev->of_node, "reg", &sess->sid)) 2190 dev_info(dev, "FastRPC Session ID not specified in DT\n"); 2191 2192 if (sessions > 0) { 2193 struct fastrpc_session_ctx *dup_sess; 2194 2195 for (i = 1; i < sessions; i++) { 2196 if (cctx->sesscount >= FASTRPC_MAX_SESSIONS) 2197 break; 2198 dup_sess = &cctx->session[cctx->sesscount++]; 2199 memcpy(dup_sess, sess, sizeof(*dup_sess)); 2200 } 2201 } 2202 spin_unlock_irqrestore(&cctx->lock, flags); 2203 rc = dma_set_mask(dev, DMA_BIT_MASK(32)); 2204 if (rc) { 2205 dev_err(dev, "32-bit DMA enable failed\n"); 2206 return rc; 2207 } 2208 2209 return 0; 2210 } 2211 2212 static int fastrpc_cb_remove(struct platform_device *pdev) 2213 { 2214 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(pdev->dev.parent); 2215 struct fastrpc_session_ctx *sess = dev_get_drvdata(&pdev->dev); 2216 unsigned long flags; 2217 int i; 2218 2219 spin_lock_irqsave(&cctx->lock, flags); 2220 for (i = 0; i < FASTRPC_MAX_SESSIONS; i++) { 2221 if (cctx->session[i].sid == sess->sid) { 2222 cctx->session[i].valid = false; 2223 cctx->sesscount--; 2224 } 2225 } 2226 spin_unlock_irqrestore(&cctx->lock, flags); 2227 2228 return 0; 2229 } 2230 2231 static const struct of_device_id fastrpc_match_table[] = { 2232 { .compatible = "qcom,fastrpc-compute-cb", }, 2233 {} 2234 }; 2235 2236 static struct platform_driver fastrpc_cb_driver = { 2237 .probe = fastrpc_cb_probe, 2238 .remove = fastrpc_cb_remove, 2239 .driver = { 2240 .name = "qcom,fastrpc-cb", 2241 .of_match_table = fastrpc_match_table, 2242 .suppress_bind_attrs = true, 2243 }, 2244 }; 2245 2246 static int fastrpc_device_register(struct device *dev, struct fastrpc_channel_ctx *cctx, 2247 bool is_secured, const char *domain) 2248 { 2249 struct fastrpc_device *fdev; 2250 int err; 2251 2252 fdev = devm_kzalloc(dev, sizeof(*fdev), GFP_KERNEL); 2253 if (!fdev) 2254 return -ENOMEM; 2255 2256 fdev->secure = is_secured; 2257 fdev->cctx = cctx; 2258 fdev->miscdev.minor = MISC_DYNAMIC_MINOR; 2259 fdev->miscdev.fops = &fastrpc_fops; 2260 fdev->miscdev.name = devm_kasprintf(dev, GFP_KERNEL, "fastrpc-%s%s", 2261 domain, is_secured ? "-secure" : ""); 2262 if (!fdev->miscdev.name) 2263 return -ENOMEM; 2264 2265 err = misc_register(&fdev->miscdev); 2266 if (!err) { 2267 if (is_secured) 2268 cctx->secure_fdevice = fdev; 2269 else 2270 cctx->fdevice = fdev; 2271 } 2272 2273 return err; 2274 } 2275 2276 static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev) 2277 { 2278 struct device *rdev = &rpdev->dev; 2279 struct fastrpc_channel_ctx *data; 2280 int i, err, domain_id = -1, vmcount; 2281 const char *domain; 2282 bool secure_dsp; 2283 unsigned int vmids[FASTRPC_MAX_VMIDS]; 2284 2285 err = of_property_read_string(rdev->of_node, "label", &domain); 2286 if (err) { 2287 dev_info(rdev, "FastRPC Domain not specified in DT\n"); 2288 return err; 2289 } 2290 2291 for (i = 0; i <= CDSP_DOMAIN_ID; i++) { 2292 if (!strcmp(domains[i], domain)) { 2293 domain_id = i; 2294 break; 2295 } 2296 } 2297 2298 if (domain_id < 0) { 2299 dev_info(rdev, "FastRPC Invalid Domain ID %d\n", domain_id); 2300 return -EINVAL; 2301 } 2302 2303 if (of_reserved_mem_device_init_by_idx(rdev, rdev->of_node, 0)) 2304 dev_info(rdev, "no reserved DMA memory for FASTRPC\n"); 2305 2306 vmcount = of_property_read_variable_u32_array(rdev->of_node, 2307 "qcom,vmids", &vmids[0], 0, FASTRPC_MAX_VMIDS); 2308 if (vmcount < 0) 2309 vmcount = 0; 2310 else if (!qcom_scm_is_available()) 2311 return -EPROBE_DEFER; 2312 2313 data = kzalloc(sizeof(*data), GFP_KERNEL); 2314 if (!data) 2315 return -ENOMEM; 2316 2317 if (vmcount) { 2318 data->vmcount = vmcount; 2319 for (i = 0; i < data->vmcount; i++) { 2320 data->vmperms[i].vmid = vmids[i]; 2321 data->vmperms[i].perm = QCOM_SCM_PERM_RWX; 2322 } 2323 } 2324 2325 secure_dsp = !(of_property_read_bool(rdev->of_node, "qcom,non-secure-domain")); 2326 data->secure = secure_dsp; 2327 2328 switch (domain_id) { 2329 case ADSP_DOMAIN_ID: 2330 case MDSP_DOMAIN_ID: 2331 case SDSP_DOMAIN_ID: 2332 /* Unsigned PD offloading is only supported on CDSP*/ 2333 data->unsigned_support = false; 2334 err = fastrpc_device_register(rdev, data, secure_dsp, domains[domain_id]); 2335 if (err) 2336 goto fdev_error; 2337 break; 2338 case CDSP_DOMAIN_ID: 2339 data->unsigned_support = true; 2340 /* Create both device nodes so that we can allow both Signed and Unsigned PD */ 2341 err = fastrpc_device_register(rdev, data, true, domains[domain_id]); 2342 if (err) 2343 goto fdev_error; 2344 2345 err = fastrpc_device_register(rdev, data, false, domains[domain_id]); 2346 if (err) 2347 goto fdev_error; 2348 break; 2349 default: 2350 err = -EINVAL; 2351 goto fdev_error; 2352 } 2353 2354 kref_init(&data->refcount); 2355 2356 dev_set_drvdata(&rpdev->dev, data); 2357 rdev->dma_mask = &data->dma_mask; 2358 dma_set_mask_and_coherent(rdev, DMA_BIT_MASK(32)); 2359 INIT_LIST_HEAD(&data->users); 2360 INIT_LIST_HEAD(&data->invoke_interrupted_mmaps); 2361 spin_lock_init(&data->lock); 2362 idr_init(&data->ctx_idr); 2363 data->domain_id = domain_id; 2364 data->rpdev = rpdev; 2365 2366 err = of_platform_populate(rdev->of_node, NULL, NULL, rdev); 2367 if (err) 2368 goto populate_error; 2369 2370 return 0; 2371 2372 populate_error: 2373 if (data->fdevice) 2374 misc_deregister(&data->fdevice->miscdev); 2375 if (data->secure_fdevice) 2376 misc_deregister(&data->secure_fdevice->miscdev); 2377 2378 fdev_error: 2379 kfree(data); 2380 return err; 2381 } 2382 2383 static void fastrpc_notify_users(struct fastrpc_user *user) 2384 { 2385 struct fastrpc_invoke_ctx *ctx; 2386 2387 spin_lock(&user->lock); 2388 list_for_each_entry(ctx, &user->pending, node) { 2389 ctx->retval = -EPIPE; 2390 complete(&ctx->work); 2391 } 2392 spin_unlock(&user->lock); 2393 } 2394 2395 static void fastrpc_rpmsg_remove(struct rpmsg_device *rpdev) 2396 { 2397 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); 2398 struct fastrpc_buf *buf, *b; 2399 struct fastrpc_user *user; 2400 unsigned long flags; 2401 2402 /* No invocations past this point */ 2403 spin_lock_irqsave(&cctx->lock, flags); 2404 cctx->rpdev = NULL; 2405 list_for_each_entry(user, &cctx->users, user) 2406 fastrpc_notify_users(user); 2407 spin_unlock_irqrestore(&cctx->lock, flags); 2408 2409 if (cctx->fdevice) 2410 misc_deregister(&cctx->fdevice->miscdev); 2411 2412 if (cctx->secure_fdevice) 2413 misc_deregister(&cctx->secure_fdevice->miscdev); 2414 2415 list_for_each_entry_safe(buf, b, &cctx->invoke_interrupted_mmaps, node) 2416 list_del(&buf->node); 2417 2418 if (cctx->remote_heap) 2419 fastrpc_buf_free(cctx->remote_heap); 2420 2421 of_platform_depopulate(&rpdev->dev); 2422 2423 fastrpc_channel_ctx_put(cctx); 2424 } 2425 2426 static int fastrpc_rpmsg_callback(struct rpmsg_device *rpdev, void *data, 2427 int len, void *priv, u32 addr) 2428 { 2429 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); 2430 struct fastrpc_invoke_rsp *rsp = data; 2431 struct fastrpc_invoke_ctx *ctx; 2432 unsigned long flags; 2433 unsigned long ctxid; 2434 2435 if (len < sizeof(*rsp)) 2436 return -EINVAL; 2437 2438 ctxid = ((rsp->ctx & FASTRPC_CTXID_MASK) >> 4); 2439 2440 spin_lock_irqsave(&cctx->lock, flags); 2441 ctx = idr_find(&cctx->ctx_idr, ctxid); 2442 spin_unlock_irqrestore(&cctx->lock, flags); 2443 2444 if (!ctx) { 2445 dev_err(&rpdev->dev, "No context ID matches response\n"); 2446 return -ENOENT; 2447 } 2448 2449 ctx->retval = rsp->retval; 2450 complete(&ctx->work); 2451 2452 /* 2453 * The DMA buffer associated with the context cannot be freed in 2454 * interrupt context so schedule it through a worker thread to 2455 * avoid a kernel BUG. 2456 */ 2457 schedule_work(&ctx->put_work); 2458 2459 return 0; 2460 } 2461 2462 static const struct of_device_id fastrpc_rpmsg_of_match[] = { 2463 { .compatible = "qcom,fastrpc" }, 2464 { }, 2465 }; 2466 MODULE_DEVICE_TABLE(of, fastrpc_rpmsg_of_match); 2467 2468 static struct rpmsg_driver fastrpc_driver = { 2469 .probe = fastrpc_rpmsg_probe, 2470 .remove = fastrpc_rpmsg_remove, 2471 .callback = fastrpc_rpmsg_callback, 2472 .drv = { 2473 .name = "qcom,fastrpc", 2474 .of_match_table = fastrpc_rpmsg_of_match, 2475 }, 2476 }; 2477 2478 static int fastrpc_init(void) 2479 { 2480 int ret; 2481 2482 ret = platform_driver_register(&fastrpc_cb_driver); 2483 if (ret < 0) { 2484 pr_err("fastrpc: failed to register cb driver\n"); 2485 return ret; 2486 } 2487 2488 ret = register_rpmsg_driver(&fastrpc_driver); 2489 if (ret < 0) { 2490 pr_err("fastrpc: failed to register rpmsg driver\n"); 2491 platform_driver_unregister(&fastrpc_cb_driver); 2492 return ret; 2493 } 2494 2495 return 0; 2496 } 2497 module_init(fastrpc_init); 2498 2499 static void fastrpc_exit(void) 2500 { 2501 platform_driver_unregister(&fastrpc_cb_driver); 2502 unregister_rpmsg_driver(&fastrpc_driver); 2503 } 2504 module_exit(fastrpc_exit); 2505 2506 MODULE_LICENSE("GPL v2"); 2507 MODULE_IMPORT_NS(DMA_BUF); 2508