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/firmware/qcom/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 u64 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 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 int err = 0; 760 761 if (!fastrpc_map_lookup(fl, fd, ppmap, true)) 762 return 0; 763 764 map = kzalloc(sizeof(*map), GFP_KERNEL); 765 if (!map) 766 return -ENOMEM; 767 768 INIT_LIST_HEAD(&map->node); 769 kref_init(&map->refcount); 770 771 map->fl = fl; 772 map->fd = fd; 773 map->buf = dma_buf_get(fd); 774 if (IS_ERR(map->buf)) { 775 err = PTR_ERR(map->buf); 776 goto get_err; 777 } 778 779 map->attach = dma_buf_attach(map->buf, sess->dev); 780 if (IS_ERR(map->attach)) { 781 dev_err(sess->dev, "Failed to attach dmabuf\n"); 782 err = PTR_ERR(map->attach); 783 goto attach_err; 784 } 785 786 map->table = dma_buf_map_attachment_unlocked(map->attach, DMA_BIDIRECTIONAL); 787 if (IS_ERR(map->table)) { 788 err = PTR_ERR(map->table); 789 goto map_err; 790 } 791 792 if (attr & FASTRPC_ATTR_SECUREMAP) { 793 map->phys = sg_phys(map->table->sgl); 794 } else { 795 map->phys = sg_dma_address(map->table->sgl); 796 map->phys += ((u64)fl->sctx->sid << 32); 797 } 798 map->size = len; 799 map->va = sg_virt(map->table->sgl); 800 map->len = len; 801 802 if (attr & FASTRPC_ATTR_SECUREMAP) { 803 /* 804 * If subsystem VMIDs are defined in DTSI, then do 805 * hyp_assign from HLOS to those VM(s) 806 */ 807 u64 src_perms = BIT(QCOM_SCM_VMID_HLOS); 808 struct qcom_scm_vmperm dst_perms[2] = {0}; 809 810 dst_perms[0].vmid = QCOM_SCM_VMID_HLOS; 811 dst_perms[0].perm = QCOM_SCM_PERM_RW; 812 dst_perms[1].vmid = fl->cctx->vmperms[0].vmid; 813 dst_perms[1].perm = QCOM_SCM_PERM_RWX; 814 map->attr = attr; 815 err = qcom_scm_assign_mem(map->phys, (u64)map->size, &src_perms, dst_perms, 2); 816 if (err) { 817 dev_err(sess->dev, "Failed to assign memory with phys 0x%llx size 0x%llx err %d", 818 map->phys, map->size, err); 819 goto map_err; 820 } 821 } 822 spin_lock(&fl->lock); 823 list_add_tail(&map->node, &fl->maps); 824 spin_unlock(&fl->lock); 825 *ppmap = map; 826 827 return 0; 828 829 map_err: 830 dma_buf_detach(map->buf, map->attach); 831 attach_err: 832 dma_buf_put(map->buf); 833 get_err: 834 fastrpc_map_put(map); 835 836 return err; 837 } 838 839 /* 840 * Fastrpc payload buffer with metadata looks like: 841 * 842 * >>>>>> START of METADATA <<<<<<<<< 843 * +---------------------------------+ 844 * | Arguments | 845 * | type:(union fastrpc_remote_arg)| 846 * | (0 - N) | 847 * +---------------------------------+ 848 * | Invoke Buffer list | 849 * | type:(struct fastrpc_invoke_buf)| 850 * | (0 - N) | 851 * +---------------------------------+ 852 * | Page info list | 853 * | type:(struct fastrpc_phy_page) | 854 * | (0 - N) | 855 * +---------------------------------+ 856 * | Optional info | 857 * |(can be specific to SoC/Firmware)| 858 * +---------------------------------+ 859 * >>>>>>>> END of METADATA <<<<<<<<< 860 * +---------------------------------+ 861 * | Inline ARGS | 862 * | (0-N) | 863 * +---------------------------------+ 864 */ 865 866 static int fastrpc_get_meta_size(struct fastrpc_invoke_ctx *ctx) 867 { 868 int size = 0; 869 870 size = (sizeof(struct fastrpc_remote_buf) + 871 sizeof(struct fastrpc_invoke_buf) + 872 sizeof(struct fastrpc_phy_page)) * ctx->nscalars + 873 sizeof(u64) * FASTRPC_MAX_FDLIST + 874 sizeof(u32) * FASTRPC_MAX_CRCLIST; 875 876 return size; 877 } 878 879 static u64 fastrpc_get_payload_size(struct fastrpc_invoke_ctx *ctx, int metalen) 880 { 881 u64 size = 0; 882 int oix; 883 884 size = ALIGN(metalen, FASTRPC_ALIGN); 885 for (oix = 0; oix < ctx->nbufs; oix++) { 886 int i = ctx->olaps[oix].raix; 887 888 if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1) { 889 890 if (ctx->olaps[oix].offset == 0) 891 size = ALIGN(size, FASTRPC_ALIGN); 892 893 size += (ctx->olaps[oix].mend - ctx->olaps[oix].mstart); 894 } 895 } 896 897 return size; 898 } 899 900 static int fastrpc_create_maps(struct fastrpc_invoke_ctx *ctx) 901 { 902 struct device *dev = ctx->fl->sctx->dev; 903 int i, err; 904 905 for (i = 0; i < ctx->nscalars; ++i) { 906 907 if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1 || 908 ctx->args[i].length == 0) 909 continue; 910 911 err = fastrpc_map_create(ctx->fl, ctx->args[i].fd, 912 ctx->args[i].length, ctx->args[i].attr, &ctx->maps[i]); 913 if (err) { 914 dev_err(dev, "Error Creating map %d\n", err); 915 return -EINVAL; 916 } 917 918 } 919 return 0; 920 } 921 922 static struct fastrpc_invoke_buf *fastrpc_invoke_buf_start(union fastrpc_remote_arg *pra, int len) 923 { 924 return (struct fastrpc_invoke_buf *)(&pra[len]); 925 } 926 927 static struct fastrpc_phy_page *fastrpc_phy_page_start(struct fastrpc_invoke_buf *buf, int len) 928 { 929 return (struct fastrpc_phy_page *)(&buf[len]); 930 } 931 932 static int fastrpc_get_args(u32 kernel, struct fastrpc_invoke_ctx *ctx) 933 { 934 struct device *dev = ctx->fl->sctx->dev; 935 union fastrpc_remote_arg *rpra; 936 struct fastrpc_invoke_buf *list; 937 struct fastrpc_phy_page *pages; 938 int inbufs, i, oix, err = 0; 939 u64 len, rlen, pkt_size; 940 u64 pg_start, pg_end; 941 uintptr_t args; 942 int metalen; 943 944 inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); 945 metalen = fastrpc_get_meta_size(ctx); 946 pkt_size = fastrpc_get_payload_size(ctx, metalen); 947 948 err = fastrpc_create_maps(ctx); 949 if (err) 950 return err; 951 952 ctx->msg_sz = pkt_size; 953 954 err = fastrpc_buf_alloc(ctx->fl, dev, pkt_size, &ctx->buf); 955 if (err) 956 return err; 957 958 rpra = ctx->buf->virt; 959 list = fastrpc_invoke_buf_start(rpra, ctx->nscalars); 960 pages = fastrpc_phy_page_start(list, ctx->nscalars); 961 args = (uintptr_t)ctx->buf->virt + metalen; 962 rlen = pkt_size - metalen; 963 ctx->rpra = rpra; 964 965 for (oix = 0; oix < ctx->nbufs; ++oix) { 966 int mlen; 967 968 i = ctx->olaps[oix].raix; 969 len = ctx->args[i].length; 970 971 rpra[i].buf.pv = 0; 972 rpra[i].buf.len = len; 973 list[i].num = len ? 1 : 0; 974 list[i].pgidx = i; 975 976 if (!len) 977 continue; 978 979 if (ctx->maps[i]) { 980 struct vm_area_struct *vma = NULL; 981 982 rpra[i].buf.pv = (u64) ctx->args[i].ptr; 983 pages[i].addr = ctx->maps[i]->phys; 984 985 mmap_read_lock(current->mm); 986 vma = find_vma(current->mm, ctx->args[i].ptr); 987 if (vma) 988 pages[i].addr += ctx->args[i].ptr - 989 vma->vm_start; 990 mmap_read_unlock(current->mm); 991 992 pg_start = (ctx->args[i].ptr & PAGE_MASK) >> PAGE_SHIFT; 993 pg_end = ((ctx->args[i].ptr + len - 1) & PAGE_MASK) >> 994 PAGE_SHIFT; 995 pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; 996 997 } else { 998 999 if (ctx->olaps[oix].offset == 0) { 1000 rlen -= ALIGN(args, FASTRPC_ALIGN) - args; 1001 args = ALIGN(args, FASTRPC_ALIGN); 1002 } 1003 1004 mlen = ctx->olaps[oix].mend - ctx->olaps[oix].mstart; 1005 1006 if (rlen < mlen) 1007 goto bail; 1008 1009 rpra[i].buf.pv = args - ctx->olaps[oix].offset; 1010 pages[i].addr = ctx->buf->phys - 1011 ctx->olaps[oix].offset + 1012 (pkt_size - rlen); 1013 pages[i].addr = pages[i].addr & PAGE_MASK; 1014 1015 pg_start = (args & PAGE_MASK) >> PAGE_SHIFT; 1016 pg_end = ((args + len - 1) & PAGE_MASK) >> PAGE_SHIFT; 1017 pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; 1018 args = args + mlen; 1019 rlen -= mlen; 1020 } 1021 1022 if (i < inbufs && !ctx->maps[i]) { 1023 void *dst = (void *)(uintptr_t)rpra[i].buf.pv; 1024 void *src = (void *)(uintptr_t)ctx->args[i].ptr; 1025 1026 if (!kernel) { 1027 if (copy_from_user(dst, (void __user *)src, 1028 len)) { 1029 err = -EFAULT; 1030 goto bail; 1031 } 1032 } else { 1033 memcpy(dst, src, len); 1034 } 1035 } 1036 } 1037 1038 for (i = ctx->nbufs; i < ctx->nscalars; ++i) { 1039 list[i].num = ctx->args[i].length ? 1 : 0; 1040 list[i].pgidx = i; 1041 if (ctx->maps[i]) { 1042 pages[i].addr = ctx->maps[i]->phys; 1043 pages[i].size = ctx->maps[i]->size; 1044 } 1045 rpra[i].dma.fd = ctx->args[i].fd; 1046 rpra[i].dma.len = ctx->args[i].length; 1047 rpra[i].dma.offset = (u64) ctx->args[i].ptr; 1048 } 1049 1050 bail: 1051 if (err) 1052 dev_err(dev, "Error: get invoke args failed:%d\n", err); 1053 1054 return err; 1055 } 1056 1057 static int fastrpc_put_args(struct fastrpc_invoke_ctx *ctx, 1058 u32 kernel) 1059 { 1060 union fastrpc_remote_arg *rpra = ctx->rpra; 1061 struct fastrpc_user *fl = ctx->fl; 1062 struct fastrpc_map *mmap = NULL; 1063 struct fastrpc_invoke_buf *list; 1064 struct fastrpc_phy_page *pages; 1065 u64 *fdlist; 1066 int i, inbufs, outbufs, handles; 1067 1068 inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); 1069 outbufs = REMOTE_SCALARS_OUTBUFS(ctx->sc); 1070 handles = REMOTE_SCALARS_INHANDLES(ctx->sc) + REMOTE_SCALARS_OUTHANDLES(ctx->sc); 1071 list = fastrpc_invoke_buf_start(rpra, ctx->nscalars); 1072 pages = fastrpc_phy_page_start(list, ctx->nscalars); 1073 fdlist = (uint64_t *)(pages + inbufs + outbufs + handles); 1074 1075 for (i = inbufs; i < ctx->nbufs; ++i) { 1076 if (!ctx->maps[i]) { 1077 void *src = (void *)(uintptr_t)rpra[i].buf.pv; 1078 void *dst = (void *)(uintptr_t)ctx->args[i].ptr; 1079 u64 len = rpra[i].buf.len; 1080 1081 if (!kernel) { 1082 if (copy_to_user((void __user *)dst, src, len)) 1083 return -EFAULT; 1084 } else { 1085 memcpy(dst, src, len); 1086 } 1087 } 1088 } 1089 1090 for (i = 0; i < FASTRPC_MAX_FDLIST; i++) { 1091 if (!fdlist[i]) 1092 break; 1093 if (!fastrpc_map_lookup(fl, (int)fdlist[i], &mmap, false)) 1094 fastrpc_map_put(mmap); 1095 } 1096 1097 return 0; 1098 } 1099 1100 static int fastrpc_invoke_send(struct fastrpc_session_ctx *sctx, 1101 struct fastrpc_invoke_ctx *ctx, 1102 u32 kernel, uint32_t handle) 1103 { 1104 struct fastrpc_channel_ctx *cctx; 1105 struct fastrpc_user *fl = ctx->fl; 1106 struct fastrpc_msg *msg = &ctx->msg; 1107 int ret; 1108 1109 cctx = fl->cctx; 1110 msg->pid = fl->tgid; 1111 msg->tid = current->pid; 1112 1113 if (kernel) 1114 msg->pid = 0; 1115 1116 msg->ctx = ctx->ctxid | fl->pd; 1117 msg->handle = handle; 1118 msg->sc = ctx->sc; 1119 msg->addr = ctx->buf ? ctx->buf->phys : 0; 1120 msg->size = roundup(ctx->msg_sz, PAGE_SIZE); 1121 fastrpc_context_get(ctx); 1122 1123 ret = rpmsg_send(cctx->rpdev->ept, (void *)msg, sizeof(*msg)); 1124 1125 if (ret) 1126 fastrpc_context_put(ctx); 1127 1128 return ret; 1129 1130 } 1131 1132 static int fastrpc_internal_invoke(struct fastrpc_user *fl, u32 kernel, 1133 u32 handle, u32 sc, 1134 struct fastrpc_invoke_args *args) 1135 { 1136 struct fastrpc_invoke_ctx *ctx = NULL; 1137 struct fastrpc_buf *buf, *b; 1138 1139 int err = 0; 1140 1141 if (!fl->sctx) 1142 return -EINVAL; 1143 1144 if (!fl->cctx->rpdev) 1145 return -EPIPE; 1146 1147 if (handle == FASTRPC_INIT_HANDLE && !kernel) { 1148 dev_warn_ratelimited(fl->sctx->dev, "user app trying to send a kernel RPC message (%d)\n", handle); 1149 return -EPERM; 1150 } 1151 1152 ctx = fastrpc_context_alloc(fl, kernel, sc, args); 1153 if (IS_ERR(ctx)) 1154 return PTR_ERR(ctx); 1155 1156 if (ctx->nscalars) { 1157 err = fastrpc_get_args(kernel, ctx); 1158 if (err) 1159 goto bail; 1160 } 1161 1162 /* make sure that all CPU memory writes are seen by DSP */ 1163 dma_wmb(); 1164 /* Send invoke buffer to remote dsp */ 1165 err = fastrpc_invoke_send(fl->sctx, ctx, kernel, handle); 1166 if (err) 1167 goto bail; 1168 1169 if (kernel) { 1170 if (!wait_for_completion_timeout(&ctx->work, 10 * HZ)) 1171 err = -ETIMEDOUT; 1172 } else { 1173 err = wait_for_completion_interruptible(&ctx->work); 1174 } 1175 1176 if (err) 1177 goto bail; 1178 1179 /* Check the response from remote dsp */ 1180 err = ctx->retval; 1181 if (err) 1182 goto bail; 1183 1184 if (ctx->nscalars) { 1185 /* make sure that all memory writes by DSP are seen by CPU */ 1186 dma_rmb(); 1187 /* populate all the output buffers with results */ 1188 err = fastrpc_put_args(ctx, kernel); 1189 if (err) 1190 goto bail; 1191 } 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 struct { 1242 int pgid; 1243 u32 namelen; 1244 u32 pageslen; 1245 } inbuf; 1246 u32 sc; 1247 1248 args = kcalloc(FASTRPC_CREATE_STATIC_PROCESS_NARGS, sizeof(*args), GFP_KERNEL); 1249 if (!args) 1250 return -ENOMEM; 1251 1252 if (copy_from_user(&init, argp, sizeof(init))) { 1253 err = -EFAULT; 1254 goto err; 1255 } 1256 1257 if (init.namelen > INIT_FILE_NAMELEN_MAX) { 1258 err = -EINVAL; 1259 goto err; 1260 } 1261 1262 name = kzalloc(init.namelen, GFP_KERNEL); 1263 if (!name) { 1264 err = -ENOMEM; 1265 goto err; 1266 } 1267 1268 if (copy_from_user(name, (void __user *)(uintptr_t)init.name, init.namelen)) { 1269 err = -EFAULT; 1270 goto err_name; 1271 } 1272 1273 if (!fl->cctx->remote_heap) { 1274 err = fastrpc_remote_heap_alloc(fl, fl->sctx->dev, init.memlen, 1275 &fl->cctx->remote_heap); 1276 if (err) 1277 goto err_name; 1278 1279 /* Map if we have any heap VMIDs associated with this ADSP Static Process. */ 1280 if (fl->cctx->vmcount) { 1281 err = qcom_scm_assign_mem(fl->cctx->remote_heap->phys, 1282 (u64)fl->cctx->remote_heap->size, 1283 &fl->cctx->perms, 1284 fl->cctx->vmperms, fl->cctx->vmcount); 1285 if (err) { 1286 dev_err(fl->sctx->dev, "Failed to assign memory with phys 0x%llx size 0x%llx err %d", 1287 fl->cctx->remote_heap->phys, fl->cctx->remote_heap->size, err); 1288 goto err_map; 1289 } 1290 } 1291 } 1292 1293 inbuf.pgid = fl->tgid; 1294 inbuf.namelen = init.namelen; 1295 inbuf.pageslen = 0; 1296 fl->pd = USER_PD; 1297 1298 args[0].ptr = (u64)(uintptr_t)&inbuf; 1299 args[0].length = sizeof(inbuf); 1300 args[0].fd = -1; 1301 1302 args[1].ptr = (u64)(uintptr_t)name; 1303 args[1].length = inbuf.namelen; 1304 args[1].fd = -1; 1305 1306 pages[0].addr = fl->cctx->remote_heap->phys; 1307 pages[0].size = fl->cctx->remote_heap->size; 1308 1309 args[2].ptr = (u64)(uintptr_t) pages; 1310 args[2].length = sizeof(*pages); 1311 args[2].fd = -1; 1312 1313 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE_STATIC, 3, 0); 1314 1315 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1316 sc, args); 1317 if (err) 1318 goto err_invoke; 1319 1320 kfree(args); 1321 1322 return 0; 1323 err_invoke: 1324 if (fl->cctx->vmcount) { 1325 struct qcom_scm_vmperm perm; 1326 1327 perm.vmid = QCOM_SCM_VMID_HLOS; 1328 perm.perm = QCOM_SCM_PERM_RWX; 1329 err = qcom_scm_assign_mem(fl->cctx->remote_heap->phys, 1330 (u64)fl->cctx->remote_heap->size, 1331 &fl->cctx->perms, &perm, 1); 1332 if (err) 1333 dev_err(fl->sctx->dev, "Failed to assign memory phys 0x%llx size 0x%llx err %d", 1334 fl->cctx->remote_heap->phys, fl->cctx->remote_heap->size, err); 1335 } 1336 err_map: 1337 fastrpc_buf_free(fl->cctx->remote_heap); 1338 err_name: 1339 kfree(name); 1340 err: 1341 kfree(args); 1342 1343 return err; 1344 } 1345 1346 static int fastrpc_init_create_process(struct fastrpc_user *fl, 1347 char __user *argp) 1348 { 1349 struct fastrpc_init_create init; 1350 struct fastrpc_invoke_args *args; 1351 struct fastrpc_phy_page pages[1]; 1352 struct fastrpc_map *map = NULL; 1353 struct fastrpc_buf *imem = NULL; 1354 int memlen; 1355 int err; 1356 struct { 1357 int pgid; 1358 u32 namelen; 1359 u32 filelen; 1360 u32 pageslen; 1361 u32 attrs; 1362 u32 siglen; 1363 } inbuf; 1364 u32 sc; 1365 bool unsigned_module = false; 1366 1367 args = kcalloc(FASTRPC_CREATE_PROCESS_NARGS, sizeof(*args), GFP_KERNEL); 1368 if (!args) 1369 return -ENOMEM; 1370 1371 if (copy_from_user(&init, argp, sizeof(init))) { 1372 err = -EFAULT; 1373 goto err; 1374 } 1375 1376 if (init.attrs & FASTRPC_MODE_UNSIGNED_MODULE) 1377 unsigned_module = true; 1378 1379 if (is_session_rejected(fl, unsigned_module)) { 1380 err = -ECONNREFUSED; 1381 goto err; 1382 } 1383 1384 if (init.filelen > INIT_FILELEN_MAX) { 1385 err = -EINVAL; 1386 goto err; 1387 } 1388 1389 inbuf.pgid = fl->tgid; 1390 inbuf.namelen = strlen(current->comm) + 1; 1391 inbuf.filelen = init.filelen; 1392 inbuf.pageslen = 1; 1393 inbuf.attrs = init.attrs; 1394 inbuf.siglen = init.siglen; 1395 fl->pd = USER_PD; 1396 1397 if (init.filelen && init.filefd) { 1398 err = fastrpc_map_create(fl, init.filefd, init.filelen, 0, &map); 1399 if (err) 1400 goto err; 1401 } 1402 1403 memlen = ALIGN(max(INIT_FILELEN_MAX, (int)init.filelen * 4), 1404 1024 * 1024); 1405 err = fastrpc_buf_alloc(fl, fl->sctx->dev, memlen, 1406 &imem); 1407 if (err) 1408 goto err_alloc; 1409 1410 fl->init_mem = imem; 1411 args[0].ptr = (u64)(uintptr_t)&inbuf; 1412 args[0].length = sizeof(inbuf); 1413 args[0].fd = -1; 1414 1415 args[1].ptr = (u64)(uintptr_t)current->comm; 1416 args[1].length = inbuf.namelen; 1417 args[1].fd = -1; 1418 1419 args[2].ptr = (u64) init.file; 1420 args[2].length = inbuf.filelen; 1421 args[2].fd = init.filefd; 1422 1423 pages[0].addr = imem->phys; 1424 pages[0].size = imem->size; 1425 1426 args[3].ptr = (u64)(uintptr_t) pages; 1427 args[3].length = 1 * sizeof(*pages); 1428 args[3].fd = -1; 1429 1430 args[4].ptr = (u64)(uintptr_t)&inbuf.attrs; 1431 args[4].length = sizeof(inbuf.attrs); 1432 args[4].fd = -1; 1433 1434 args[5].ptr = (u64)(uintptr_t) &inbuf.siglen; 1435 args[5].length = sizeof(inbuf.siglen); 1436 args[5].fd = -1; 1437 1438 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE, 4, 0); 1439 if (init.attrs) 1440 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE_ATTR, 6, 0); 1441 1442 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1443 sc, args); 1444 if (err) 1445 goto err_invoke; 1446 1447 kfree(args); 1448 1449 return 0; 1450 1451 err_invoke: 1452 fl->init_mem = NULL; 1453 fastrpc_buf_free(imem); 1454 err_alloc: 1455 fastrpc_map_put(map); 1456 err: 1457 kfree(args); 1458 1459 return err; 1460 } 1461 1462 static struct fastrpc_session_ctx *fastrpc_session_alloc( 1463 struct fastrpc_channel_ctx *cctx) 1464 { 1465 struct fastrpc_session_ctx *session = NULL; 1466 unsigned long flags; 1467 int i; 1468 1469 spin_lock_irqsave(&cctx->lock, flags); 1470 for (i = 0; i < cctx->sesscount; i++) { 1471 if (!cctx->session[i].used && cctx->session[i].valid) { 1472 cctx->session[i].used = true; 1473 session = &cctx->session[i]; 1474 break; 1475 } 1476 } 1477 spin_unlock_irqrestore(&cctx->lock, flags); 1478 1479 return session; 1480 } 1481 1482 static void fastrpc_session_free(struct fastrpc_channel_ctx *cctx, 1483 struct fastrpc_session_ctx *session) 1484 { 1485 unsigned long flags; 1486 1487 spin_lock_irqsave(&cctx->lock, flags); 1488 session->used = false; 1489 spin_unlock_irqrestore(&cctx->lock, flags); 1490 } 1491 1492 static int fastrpc_release_current_dsp_process(struct fastrpc_user *fl) 1493 { 1494 struct fastrpc_invoke_args args[1]; 1495 int tgid = 0; 1496 u32 sc; 1497 1498 tgid = fl->tgid; 1499 args[0].ptr = (u64)(uintptr_t) &tgid; 1500 args[0].length = sizeof(tgid); 1501 args[0].fd = -1; 1502 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_RELEASE, 1, 0); 1503 1504 return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1505 sc, &args[0]); 1506 } 1507 1508 static int fastrpc_device_release(struct inode *inode, struct file *file) 1509 { 1510 struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; 1511 struct fastrpc_channel_ctx *cctx = fl->cctx; 1512 struct fastrpc_invoke_ctx *ctx, *n; 1513 struct fastrpc_map *map, *m; 1514 struct fastrpc_buf *buf, *b; 1515 unsigned long flags; 1516 1517 fastrpc_release_current_dsp_process(fl); 1518 1519 spin_lock_irqsave(&cctx->lock, flags); 1520 list_del(&fl->user); 1521 spin_unlock_irqrestore(&cctx->lock, flags); 1522 1523 if (fl->init_mem) 1524 fastrpc_buf_free(fl->init_mem); 1525 1526 list_for_each_entry_safe(ctx, n, &fl->pending, node) { 1527 list_del(&ctx->node); 1528 fastrpc_context_put(ctx); 1529 } 1530 1531 list_for_each_entry_safe(map, m, &fl->maps, node) 1532 fastrpc_map_put(map); 1533 1534 list_for_each_entry_safe(buf, b, &fl->mmaps, node) { 1535 list_del(&buf->node); 1536 fastrpc_buf_free(buf); 1537 } 1538 1539 fastrpc_session_free(cctx, fl->sctx); 1540 fastrpc_channel_ctx_put(cctx); 1541 1542 mutex_destroy(&fl->mutex); 1543 kfree(fl); 1544 file->private_data = NULL; 1545 1546 return 0; 1547 } 1548 1549 static int fastrpc_device_open(struct inode *inode, struct file *filp) 1550 { 1551 struct fastrpc_channel_ctx *cctx; 1552 struct fastrpc_device *fdevice; 1553 struct fastrpc_user *fl = NULL; 1554 unsigned long flags; 1555 1556 fdevice = miscdev_to_fdevice(filp->private_data); 1557 cctx = fdevice->cctx; 1558 1559 fl = kzalloc(sizeof(*fl), GFP_KERNEL); 1560 if (!fl) 1561 return -ENOMEM; 1562 1563 /* Released in fastrpc_device_release() */ 1564 fastrpc_channel_ctx_get(cctx); 1565 1566 filp->private_data = fl; 1567 spin_lock_init(&fl->lock); 1568 mutex_init(&fl->mutex); 1569 INIT_LIST_HEAD(&fl->pending); 1570 INIT_LIST_HEAD(&fl->maps); 1571 INIT_LIST_HEAD(&fl->mmaps); 1572 INIT_LIST_HEAD(&fl->user); 1573 fl->tgid = current->tgid; 1574 fl->cctx = cctx; 1575 fl->is_secure_dev = fdevice->secure; 1576 1577 fl->sctx = fastrpc_session_alloc(cctx); 1578 if (!fl->sctx) { 1579 dev_err(&cctx->rpdev->dev, "No session available\n"); 1580 mutex_destroy(&fl->mutex); 1581 kfree(fl); 1582 1583 return -EBUSY; 1584 } 1585 1586 spin_lock_irqsave(&cctx->lock, flags); 1587 list_add_tail(&fl->user, &cctx->users); 1588 spin_unlock_irqrestore(&cctx->lock, flags); 1589 1590 return 0; 1591 } 1592 1593 static int fastrpc_dmabuf_alloc(struct fastrpc_user *fl, char __user *argp) 1594 { 1595 struct fastrpc_alloc_dma_buf bp; 1596 DEFINE_DMA_BUF_EXPORT_INFO(exp_info); 1597 struct fastrpc_buf *buf = NULL; 1598 int err; 1599 1600 if (copy_from_user(&bp, argp, sizeof(bp))) 1601 return -EFAULT; 1602 1603 err = fastrpc_buf_alloc(fl, fl->sctx->dev, bp.size, &buf); 1604 if (err) 1605 return err; 1606 exp_info.ops = &fastrpc_dma_buf_ops; 1607 exp_info.size = bp.size; 1608 exp_info.flags = O_RDWR; 1609 exp_info.priv = buf; 1610 buf->dmabuf = dma_buf_export(&exp_info); 1611 if (IS_ERR(buf->dmabuf)) { 1612 err = PTR_ERR(buf->dmabuf); 1613 fastrpc_buf_free(buf); 1614 return err; 1615 } 1616 1617 bp.fd = dma_buf_fd(buf->dmabuf, O_ACCMODE); 1618 if (bp.fd < 0) { 1619 dma_buf_put(buf->dmabuf); 1620 return -EINVAL; 1621 } 1622 1623 if (copy_to_user(argp, &bp, sizeof(bp))) { 1624 /* 1625 * The usercopy failed, but we can't do much about it, as 1626 * dma_buf_fd() already called fd_install() and made the 1627 * file descriptor accessible for the current process. It 1628 * might already be closed and dmabuf no longer valid when 1629 * we reach this point. Therefore "leak" the fd and rely on 1630 * the process exit path to do any required cleanup. 1631 */ 1632 return -EFAULT; 1633 } 1634 1635 return 0; 1636 } 1637 1638 static int fastrpc_init_attach(struct fastrpc_user *fl, int pd) 1639 { 1640 struct fastrpc_invoke_args args[1]; 1641 int tgid = fl->tgid; 1642 u32 sc; 1643 1644 args[0].ptr = (u64)(uintptr_t) &tgid; 1645 args[0].length = sizeof(tgid); 1646 args[0].fd = -1; 1647 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_ATTACH, 1, 0); 1648 fl->pd = pd; 1649 1650 return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1651 sc, &args[0]); 1652 } 1653 1654 static int fastrpc_invoke(struct fastrpc_user *fl, char __user *argp) 1655 { 1656 struct fastrpc_invoke_args *args = NULL; 1657 struct fastrpc_invoke inv; 1658 u32 nscalars; 1659 int err; 1660 1661 if (copy_from_user(&inv, argp, sizeof(inv))) 1662 return -EFAULT; 1663 1664 /* nscalars is truncated here to max supported value */ 1665 nscalars = REMOTE_SCALARS_LENGTH(inv.sc); 1666 if (nscalars) { 1667 args = kcalloc(nscalars, sizeof(*args), GFP_KERNEL); 1668 if (!args) 1669 return -ENOMEM; 1670 1671 if (copy_from_user(args, (void __user *)(uintptr_t)inv.args, 1672 nscalars * sizeof(*args))) { 1673 kfree(args); 1674 return -EFAULT; 1675 } 1676 } 1677 1678 err = fastrpc_internal_invoke(fl, false, inv.handle, inv.sc, args); 1679 kfree(args); 1680 1681 return err; 1682 } 1683 1684 static int fastrpc_get_info_from_dsp(struct fastrpc_user *fl, uint32_t *dsp_attr_buf, 1685 uint32_t dsp_attr_buf_len) 1686 { 1687 struct fastrpc_invoke_args args[2] = { 0 }; 1688 1689 /* Capability filled in userspace */ 1690 dsp_attr_buf[0] = 0; 1691 1692 args[0].ptr = (u64)(uintptr_t)&dsp_attr_buf_len; 1693 args[0].length = sizeof(dsp_attr_buf_len); 1694 args[0].fd = -1; 1695 args[1].ptr = (u64)(uintptr_t)&dsp_attr_buf[1]; 1696 args[1].length = dsp_attr_buf_len; 1697 args[1].fd = -1; 1698 fl->pd = USER_PD; 1699 1700 return fastrpc_internal_invoke(fl, true, FASTRPC_DSP_UTILITIES_HANDLE, 1701 FASTRPC_SCALARS(0, 1, 1), args); 1702 } 1703 1704 static int fastrpc_get_info_from_kernel(struct fastrpc_ioctl_capability *cap, 1705 struct fastrpc_user *fl) 1706 { 1707 struct fastrpc_channel_ctx *cctx = fl->cctx; 1708 uint32_t attribute_id = cap->attribute_id; 1709 uint32_t *dsp_attributes; 1710 unsigned long flags; 1711 uint32_t domain = cap->domain; 1712 int err; 1713 1714 spin_lock_irqsave(&cctx->lock, flags); 1715 /* check if we already have queried dsp for attributes */ 1716 if (cctx->valid_attributes) { 1717 spin_unlock_irqrestore(&cctx->lock, flags); 1718 goto done; 1719 } 1720 spin_unlock_irqrestore(&cctx->lock, flags); 1721 1722 dsp_attributes = kzalloc(FASTRPC_MAX_DSP_ATTRIBUTES_LEN, GFP_KERNEL); 1723 if (!dsp_attributes) 1724 return -ENOMEM; 1725 1726 err = fastrpc_get_info_from_dsp(fl, dsp_attributes, FASTRPC_MAX_DSP_ATTRIBUTES_LEN); 1727 if (err == DSP_UNSUPPORTED_API) { 1728 dev_info(&cctx->rpdev->dev, 1729 "Warning: DSP capabilities not supported on domain: %d\n", domain); 1730 kfree(dsp_attributes); 1731 return -EOPNOTSUPP; 1732 } else if (err) { 1733 dev_err(&cctx->rpdev->dev, "Error: dsp information is incorrect err: %d\n", err); 1734 kfree(dsp_attributes); 1735 return err; 1736 } 1737 1738 spin_lock_irqsave(&cctx->lock, flags); 1739 memcpy(cctx->dsp_attributes, dsp_attributes, FASTRPC_MAX_DSP_ATTRIBUTES_LEN); 1740 cctx->valid_attributes = true; 1741 spin_unlock_irqrestore(&cctx->lock, flags); 1742 kfree(dsp_attributes); 1743 done: 1744 cap->capability = cctx->dsp_attributes[attribute_id]; 1745 return 0; 1746 } 1747 1748 static int fastrpc_get_dsp_info(struct fastrpc_user *fl, char __user *argp) 1749 { 1750 struct fastrpc_ioctl_capability cap = {0}; 1751 int err = 0; 1752 1753 if (copy_from_user(&cap, argp, sizeof(cap))) 1754 return -EFAULT; 1755 1756 cap.capability = 0; 1757 if (cap.domain >= FASTRPC_DEV_MAX) { 1758 dev_err(&fl->cctx->rpdev->dev, "Error: Invalid domain id:%d, err:%d\n", 1759 cap.domain, err); 1760 return -ECHRNG; 1761 } 1762 1763 /* Fastrpc Capablities does not support modem domain */ 1764 if (cap.domain == MDSP_DOMAIN_ID) { 1765 dev_err(&fl->cctx->rpdev->dev, "Error: modem not supported %d\n", err); 1766 return -ECHRNG; 1767 } 1768 1769 if (cap.attribute_id >= FASTRPC_MAX_DSP_ATTRIBUTES) { 1770 dev_err(&fl->cctx->rpdev->dev, "Error: invalid attribute: %d, err: %d\n", 1771 cap.attribute_id, err); 1772 return -EOVERFLOW; 1773 } 1774 1775 err = fastrpc_get_info_from_kernel(&cap, fl); 1776 if (err) 1777 return err; 1778 1779 if (copy_to_user(argp, &cap.capability, sizeof(cap.capability))) 1780 return -EFAULT; 1781 1782 return 0; 1783 } 1784 1785 static int fastrpc_req_munmap_impl(struct fastrpc_user *fl, struct fastrpc_buf *buf) 1786 { 1787 struct fastrpc_invoke_args args[1] = { [0] = { 0 } }; 1788 struct fastrpc_munmap_req_msg req_msg; 1789 struct device *dev = fl->sctx->dev; 1790 int err; 1791 u32 sc; 1792 1793 req_msg.pgid = fl->tgid; 1794 req_msg.size = buf->size; 1795 req_msg.vaddr = buf->raddr; 1796 1797 args[0].ptr = (u64) (uintptr_t) &req_msg; 1798 args[0].length = sizeof(req_msg); 1799 1800 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MUNMAP, 1, 0); 1801 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, 1802 &args[0]); 1803 if (!err) { 1804 dev_dbg(dev, "unmmap\tpt 0x%09lx OK\n", buf->raddr); 1805 spin_lock(&fl->lock); 1806 list_del(&buf->node); 1807 spin_unlock(&fl->lock); 1808 fastrpc_buf_free(buf); 1809 } else { 1810 dev_err(dev, "unmmap\tpt 0x%09lx ERROR\n", buf->raddr); 1811 } 1812 1813 return err; 1814 } 1815 1816 static int fastrpc_req_munmap(struct fastrpc_user *fl, char __user *argp) 1817 { 1818 struct fastrpc_buf *buf = NULL, *iter, *b; 1819 struct fastrpc_req_munmap req; 1820 struct device *dev = fl->sctx->dev; 1821 1822 if (copy_from_user(&req, argp, sizeof(req))) 1823 return -EFAULT; 1824 1825 spin_lock(&fl->lock); 1826 list_for_each_entry_safe(iter, b, &fl->mmaps, node) { 1827 if ((iter->raddr == req.vaddrout) && (iter->size == req.size)) { 1828 buf = iter; 1829 break; 1830 } 1831 } 1832 spin_unlock(&fl->lock); 1833 1834 if (!buf) { 1835 dev_err(dev, "mmap\t\tpt 0x%09llx [len 0x%08llx] not in list\n", 1836 req.vaddrout, req.size); 1837 return -EINVAL; 1838 } 1839 1840 return fastrpc_req_munmap_impl(fl, buf); 1841 } 1842 1843 static int fastrpc_req_mmap(struct fastrpc_user *fl, char __user *argp) 1844 { 1845 struct fastrpc_invoke_args args[3] = { [0 ... 2] = { 0 } }; 1846 struct fastrpc_buf *buf = NULL; 1847 struct fastrpc_mmap_req_msg req_msg; 1848 struct fastrpc_mmap_rsp_msg rsp_msg; 1849 struct fastrpc_phy_page pages; 1850 struct fastrpc_req_mmap req; 1851 struct device *dev = fl->sctx->dev; 1852 int err; 1853 u32 sc; 1854 1855 if (copy_from_user(&req, argp, sizeof(req))) 1856 return -EFAULT; 1857 1858 if (req.flags != ADSP_MMAP_ADD_PAGES && req.flags != ADSP_MMAP_REMOTE_HEAP_ADDR) { 1859 dev_err(dev, "flag not supported 0x%x\n", req.flags); 1860 1861 return -EINVAL; 1862 } 1863 1864 if (req.vaddrin) { 1865 dev_err(dev, "adding user allocated pages is not supported\n"); 1866 return -EINVAL; 1867 } 1868 1869 err = fastrpc_buf_alloc(fl, fl->sctx->dev, req.size, &buf); 1870 if (err) { 1871 dev_err(dev, "failed to allocate buffer\n"); 1872 return err; 1873 } 1874 1875 req_msg.pgid = fl->tgid; 1876 req_msg.flags = req.flags; 1877 req_msg.vaddr = req.vaddrin; 1878 req_msg.num = sizeof(pages); 1879 1880 args[0].ptr = (u64) (uintptr_t) &req_msg; 1881 args[0].length = sizeof(req_msg); 1882 1883 pages.addr = buf->phys; 1884 pages.size = buf->size; 1885 1886 args[1].ptr = (u64) (uintptr_t) &pages; 1887 args[1].length = sizeof(pages); 1888 1889 args[2].ptr = (u64) (uintptr_t) &rsp_msg; 1890 args[2].length = sizeof(rsp_msg); 1891 1892 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MMAP, 2, 1); 1893 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, 1894 &args[0]); 1895 if (err) { 1896 dev_err(dev, "mmap error (len 0x%08llx)\n", buf->size); 1897 goto err_invoke; 1898 } 1899 1900 /* update the buffer to be able to deallocate the memory on the DSP */ 1901 buf->raddr = (uintptr_t) rsp_msg.vaddr; 1902 1903 /* let the client know the address to use */ 1904 req.vaddrout = rsp_msg.vaddr; 1905 1906 /* Add memory to static PD pool, protection thru hypervisor */ 1907 if (req.flags == ADSP_MMAP_REMOTE_HEAP_ADDR && fl->cctx->vmcount) { 1908 struct qcom_scm_vmperm perm; 1909 1910 perm.vmid = QCOM_SCM_VMID_HLOS; 1911 perm.perm = QCOM_SCM_PERM_RWX; 1912 err = qcom_scm_assign_mem(buf->phys, buf->size, 1913 &fl->cctx->perms, &perm, 1); 1914 if (err) { 1915 dev_err(fl->sctx->dev, "Failed to assign memory phys 0x%llx size 0x%llx err %d", 1916 buf->phys, buf->size, err); 1917 goto err_assign; 1918 } 1919 } 1920 1921 spin_lock(&fl->lock); 1922 list_add_tail(&buf->node, &fl->mmaps); 1923 spin_unlock(&fl->lock); 1924 1925 if (copy_to_user((void __user *)argp, &req, sizeof(req))) { 1926 err = -EFAULT; 1927 goto err_assign; 1928 } 1929 1930 dev_dbg(dev, "mmap\t\tpt 0x%09lx OK [len 0x%08llx]\n", 1931 buf->raddr, buf->size); 1932 1933 return 0; 1934 1935 err_assign: 1936 fastrpc_req_munmap_impl(fl, buf); 1937 err_invoke: 1938 fastrpc_buf_free(buf); 1939 1940 return err; 1941 } 1942 1943 static int fastrpc_req_mem_unmap_impl(struct fastrpc_user *fl, struct fastrpc_mem_unmap *req) 1944 { 1945 struct fastrpc_invoke_args args[1] = { [0] = { 0 } }; 1946 struct fastrpc_map *map = NULL, *iter, *m; 1947 struct fastrpc_mem_unmap_req_msg req_msg = { 0 }; 1948 int err = 0; 1949 u32 sc; 1950 struct device *dev = fl->sctx->dev; 1951 1952 spin_lock(&fl->lock); 1953 list_for_each_entry_safe(iter, m, &fl->maps, node) { 1954 if ((req->fd < 0 || iter->fd == req->fd) && (iter->raddr == req->vaddr)) { 1955 map = iter; 1956 break; 1957 } 1958 } 1959 1960 spin_unlock(&fl->lock); 1961 1962 if (!map) { 1963 dev_err(dev, "map not in list\n"); 1964 return -EINVAL; 1965 } 1966 1967 req_msg.pgid = fl->tgid; 1968 req_msg.len = map->len; 1969 req_msg.vaddrin = map->raddr; 1970 req_msg.fd = map->fd; 1971 1972 args[0].ptr = (u64) (uintptr_t) &req_msg; 1973 args[0].length = sizeof(req_msg); 1974 1975 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MEM_UNMAP, 1, 0); 1976 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, 1977 &args[0]); 1978 fastrpc_map_put(map); 1979 if (err) 1980 dev_err(dev, "unmmap\tpt fd = %d, 0x%09llx error\n", map->fd, map->raddr); 1981 1982 return err; 1983 } 1984 1985 static int fastrpc_req_mem_unmap(struct fastrpc_user *fl, char __user *argp) 1986 { 1987 struct fastrpc_mem_unmap req; 1988 1989 if (copy_from_user(&req, argp, sizeof(req))) 1990 return -EFAULT; 1991 1992 return fastrpc_req_mem_unmap_impl(fl, &req); 1993 } 1994 1995 static int fastrpc_req_mem_map(struct fastrpc_user *fl, char __user *argp) 1996 { 1997 struct fastrpc_invoke_args args[4] = { [0 ... 3] = { 0 } }; 1998 struct fastrpc_mem_map_req_msg req_msg = { 0 }; 1999 struct fastrpc_mmap_rsp_msg rsp_msg = { 0 }; 2000 struct fastrpc_mem_unmap req_unmap = { 0 }; 2001 struct fastrpc_phy_page pages = { 0 }; 2002 struct fastrpc_mem_map req; 2003 struct device *dev = fl->sctx->dev; 2004 struct fastrpc_map *map = NULL; 2005 int err; 2006 u32 sc; 2007 2008 if (copy_from_user(&req, argp, sizeof(req))) 2009 return -EFAULT; 2010 2011 /* create SMMU mapping */ 2012 err = fastrpc_map_create(fl, req.fd, req.length, 0, &map); 2013 if (err) { 2014 dev_err(dev, "failed to map buffer, fd = %d\n", req.fd); 2015 return err; 2016 } 2017 2018 req_msg.pgid = fl->tgid; 2019 req_msg.fd = req.fd; 2020 req_msg.offset = req.offset; 2021 req_msg.vaddrin = req.vaddrin; 2022 map->va = (void *) (uintptr_t) req.vaddrin; 2023 req_msg.flags = req.flags; 2024 req_msg.num = sizeof(pages); 2025 req_msg.data_len = 0; 2026 2027 args[0].ptr = (u64) (uintptr_t) &req_msg; 2028 args[0].length = sizeof(req_msg); 2029 2030 pages.addr = map->phys; 2031 pages.size = map->size; 2032 2033 args[1].ptr = (u64) (uintptr_t) &pages; 2034 args[1].length = sizeof(pages); 2035 2036 args[2].ptr = (u64) (uintptr_t) &pages; 2037 args[2].length = 0; 2038 2039 args[3].ptr = (u64) (uintptr_t) &rsp_msg; 2040 args[3].length = sizeof(rsp_msg); 2041 2042 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MEM_MAP, 3, 1); 2043 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, &args[0]); 2044 if (err) { 2045 dev_err(dev, "mem mmap error, fd %d, vaddr %llx, size %lld\n", 2046 req.fd, req.vaddrin, map->size); 2047 goto err_invoke; 2048 } 2049 2050 /* update the buffer to be able to deallocate the memory on the DSP */ 2051 map->raddr = rsp_msg.vaddr; 2052 2053 /* let the client know the address to use */ 2054 req.vaddrout = rsp_msg.vaddr; 2055 2056 if (copy_to_user((void __user *)argp, &req, sizeof(req))) { 2057 /* unmap the memory and release the buffer */ 2058 req_unmap.vaddr = (uintptr_t) rsp_msg.vaddr; 2059 req_unmap.length = map->size; 2060 fastrpc_req_mem_unmap_impl(fl, &req_unmap); 2061 return -EFAULT; 2062 } 2063 2064 return 0; 2065 2066 err_invoke: 2067 fastrpc_map_put(map); 2068 2069 return err; 2070 } 2071 2072 static long fastrpc_device_ioctl(struct file *file, unsigned int cmd, 2073 unsigned long arg) 2074 { 2075 struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; 2076 char __user *argp = (char __user *)arg; 2077 int err; 2078 2079 switch (cmd) { 2080 case FASTRPC_IOCTL_INVOKE: 2081 err = fastrpc_invoke(fl, argp); 2082 break; 2083 case FASTRPC_IOCTL_INIT_ATTACH: 2084 err = fastrpc_init_attach(fl, ROOT_PD); 2085 break; 2086 case FASTRPC_IOCTL_INIT_ATTACH_SNS: 2087 err = fastrpc_init_attach(fl, SENSORS_PD); 2088 break; 2089 case FASTRPC_IOCTL_INIT_CREATE_STATIC: 2090 err = fastrpc_init_create_static_process(fl, argp); 2091 break; 2092 case FASTRPC_IOCTL_INIT_CREATE: 2093 err = fastrpc_init_create_process(fl, argp); 2094 break; 2095 case FASTRPC_IOCTL_ALLOC_DMA_BUFF: 2096 err = fastrpc_dmabuf_alloc(fl, argp); 2097 break; 2098 case FASTRPC_IOCTL_MMAP: 2099 err = fastrpc_req_mmap(fl, argp); 2100 break; 2101 case FASTRPC_IOCTL_MUNMAP: 2102 err = fastrpc_req_munmap(fl, argp); 2103 break; 2104 case FASTRPC_IOCTL_MEM_MAP: 2105 err = fastrpc_req_mem_map(fl, argp); 2106 break; 2107 case FASTRPC_IOCTL_MEM_UNMAP: 2108 err = fastrpc_req_mem_unmap(fl, argp); 2109 break; 2110 case FASTRPC_IOCTL_GET_DSP_INFO: 2111 err = fastrpc_get_dsp_info(fl, argp); 2112 break; 2113 default: 2114 err = -ENOTTY; 2115 break; 2116 } 2117 2118 return err; 2119 } 2120 2121 static const struct file_operations fastrpc_fops = { 2122 .open = fastrpc_device_open, 2123 .release = fastrpc_device_release, 2124 .unlocked_ioctl = fastrpc_device_ioctl, 2125 .compat_ioctl = fastrpc_device_ioctl, 2126 }; 2127 2128 static int fastrpc_cb_probe(struct platform_device *pdev) 2129 { 2130 struct fastrpc_channel_ctx *cctx; 2131 struct fastrpc_session_ctx *sess; 2132 struct device *dev = &pdev->dev; 2133 int i, sessions = 0; 2134 unsigned long flags; 2135 int rc; 2136 2137 cctx = dev_get_drvdata(dev->parent); 2138 if (!cctx) 2139 return -EINVAL; 2140 2141 of_property_read_u32(dev->of_node, "qcom,nsessions", &sessions); 2142 2143 spin_lock_irqsave(&cctx->lock, flags); 2144 if (cctx->sesscount >= FASTRPC_MAX_SESSIONS) { 2145 dev_err(&pdev->dev, "too many sessions\n"); 2146 spin_unlock_irqrestore(&cctx->lock, flags); 2147 return -ENOSPC; 2148 } 2149 sess = &cctx->session[cctx->sesscount++]; 2150 sess->used = false; 2151 sess->valid = true; 2152 sess->dev = dev; 2153 dev_set_drvdata(dev, sess); 2154 2155 if (of_property_read_u32(dev->of_node, "reg", &sess->sid)) 2156 dev_info(dev, "FastRPC Session ID not specified in DT\n"); 2157 2158 if (sessions > 0) { 2159 struct fastrpc_session_ctx *dup_sess; 2160 2161 for (i = 1; i < sessions; i++) { 2162 if (cctx->sesscount >= FASTRPC_MAX_SESSIONS) 2163 break; 2164 dup_sess = &cctx->session[cctx->sesscount++]; 2165 memcpy(dup_sess, sess, sizeof(*dup_sess)); 2166 } 2167 } 2168 spin_unlock_irqrestore(&cctx->lock, flags); 2169 rc = dma_set_mask(dev, DMA_BIT_MASK(32)); 2170 if (rc) { 2171 dev_err(dev, "32-bit DMA enable failed\n"); 2172 return rc; 2173 } 2174 2175 return 0; 2176 } 2177 2178 static int fastrpc_cb_remove(struct platform_device *pdev) 2179 { 2180 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(pdev->dev.parent); 2181 struct fastrpc_session_ctx *sess = dev_get_drvdata(&pdev->dev); 2182 unsigned long flags; 2183 int i; 2184 2185 spin_lock_irqsave(&cctx->lock, flags); 2186 for (i = 1; i < FASTRPC_MAX_SESSIONS; i++) { 2187 if (cctx->session[i].sid == sess->sid) { 2188 cctx->session[i].valid = false; 2189 cctx->sesscount--; 2190 } 2191 } 2192 spin_unlock_irqrestore(&cctx->lock, flags); 2193 2194 return 0; 2195 } 2196 2197 static const struct of_device_id fastrpc_match_table[] = { 2198 { .compatible = "qcom,fastrpc-compute-cb", }, 2199 {} 2200 }; 2201 2202 static struct platform_driver fastrpc_cb_driver = { 2203 .probe = fastrpc_cb_probe, 2204 .remove = fastrpc_cb_remove, 2205 .driver = { 2206 .name = "qcom,fastrpc-cb", 2207 .of_match_table = fastrpc_match_table, 2208 .suppress_bind_attrs = true, 2209 }, 2210 }; 2211 2212 static int fastrpc_device_register(struct device *dev, struct fastrpc_channel_ctx *cctx, 2213 bool is_secured, const char *domain) 2214 { 2215 struct fastrpc_device *fdev; 2216 int err; 2217 2218 fdev = devm_kzalloc(dev, sizeof(*fdev), GFP_KERNEL); 2219 if (!fdev) 2220 return -ENOMEM; 2221 2222 fdev->secure = is_secured; 2223 fdev->cctx = cctx; 2224 fdev->miscdev.minor = MISC_DYNAMIC_MINOR; 2225 fdev->miscdev.fops = &fastrpc_fops; 2226 fdev->miscdev.name = devm_kasprintf(dev, GFP_KERNEL, "fastrpc-%s%s", 2227 domain, is_secured ? "-secure" : ""); 2228 err = misc_register(&fdev->miscdev); 2229 if (!err) { 2230 if (is_secured) 2231 cctx->secure_fdevice = fdev; 2232 else 2233 cctx->fdevice = fdev; 2234 } 2235 2236 return err; 2237 } 2238 2239 static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev) 2240 { 2241 struct device *rdev = &rpdev->dev; 2242 struct fastrpc_channel_ctx *data; 2243 int i, err, domain_id = -1, vmcount; 2244 const char *domain; 2245 bool secure_dsp; 2246 unsigned int vmids[FASTRPC_MAX_VMIDS]; 2247 2248 err = of_property_read_string(rdev->of_node, "label", &domain); 2249 if (err) { 2250 dev_info(rdev, "FastRPC Domain not specified in DT\n"); 2251 return err; 2252 } 2253 2254 for (i = 0; i <= CDSP_DOMAIN_ID; i++) { 2255 if (!strcmp(domains[i], domain)) { 2256 domain_id = i; 2257 break; 2258 } 2259 } 2260 2261 if (domain_id < 0) { 2262 dev_info(rdev, "FastRPC Invalid Domain ID %d\n", domain_id); 2263 return -EINVAL; 2264 } 2265 2266 if (of_reserved_mem_device_init_by_idx(rdev, rdev->of_node, 0)) 2267 dev_info(rdev, "no reserved DMA memory for FASTRPC\n"); 2268 2269 vmcount = of_property_read_variable_u32_array(rdev->of_node, 2270 "qcom,vmids", &vmids[0], 0, FASTRPC_MAX_VMIDS); 2271 if (vmcount < 0) 2272 vmcount = 0; 2273 else if (!qcom_scm_is_available()) 2274 return -EPROBE_DEFER; 2275 2276 data = kzalloc(sizeof(*data), GFP_KERNEL); 2277 if (!data) 2278 return -ENOMEM; 2279 2280 if (vmcount) { 2281 data->vmcount = vmcount; 2282 data->perms = BIT(QCOM_SCM_VMID_HLOS); 2283 for (i = 0; i < data->vmcount; i++) { 2284 data->vmperms[i].vmid = vmids[i]; 2285 data->vmperms[i].perm = QCOM_SCM_PERM_RWX; 2286 } 2287 } 2288 2289 secure_dsp = !(of_property_read_bool(rdev->of_node, "qcom,non-secure-domain")); 2290 data->secure = secure_dsp; 2291 2292 switch (domain_id) { 2293 case ADSP_DOMAIN_ID: 2294 case MDSP_DOMAIN_ID: 2295 case SDSP_DOMAIN_ID: 2296 /* Unsigned PD offloading is only supported on CDSP*/ 2297 data->unsigned_support = false; 2298 err = fastrpc_device_register(rdev, data, secure_dsp, domains[domain_id]); 2299 if (err) 2300 goto fdev_error; 2301 break; 2302 case CDSP_DOMAIN_ID: 2303 data->unsigned_support = true; 2304 /* Create both device nodes so that we can allow both Signed and Unsigned PD */ 2305 err = fastrpc_device_register(rdev, data, true, domains[domain_id]); 2306 if (err) 2307 goto fdev_error; 2308 2309 err = fastrpc_device_register(rdev, data, false, domains[domain_id]); 2310 if (err) 2311 goto fdev_error; 2312 break; 2313 default: 2314 err = -EINVAL; 2315 goto fdev_error; 2316 } 2317 2318 kref_init(&data->refcount); 2319 2320 dev_set_drvdata(&rpdev->dev, data); 2321 rdev->dma_mask = &data->dma_mask; 2322 dma_set_mask_and_coherent(rdev, DMA_BIT_MASK(32)); 2323 INIT_LIST_HEAD(&data->users); 2324 INIT_LIST_HEAD(&data->invoke_interrupted_mmaps); 2325 spin_lock_init(&data->lock); 2326 idr_init(&data->ctx_idr); 2327 data->domain_id = domain_id; 2328 data->rpdev = rpdev; 2329 2330 err = of_platform_populate(rdev->of_node, NULL, NULL, rdev); 2331 if (err) 2332 goto populate_error; 2333 2334 return 0; 2335 2336 populate_error: 2337 if (data->fdevice) 2338 misc_deregister(&data->fdevice->miscdev); 2339 if (data->secure_fdevice) 2340 misc_deregister(&data->secure_fdevice->miscdev); 2341 2342 fdev_error: 2343 kfree(data); 2344 return err; 2345 } 2346 2347 static void fastrpc_notify_users(struct fastrpc_user *user) 2348 { 2349 struct fastrpc_invoke_ctx *ctx; 2350 2351 spin_lock(&user->lock); 2352 list_for_each_entry(ctx, &user->pending, node) { 2353 ctx->retval = -EPIPE; 2354 complete(&ctx->work); 2355 } 2356 spin_unlock(&user->lock); 2357 } 2358 2359 static void fastrpc_rpmsg_remove(struct rpmsg_device *rpdev) 2360 { 2361 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); 2362 struct fastrpc_buf *buf, *b; 2363 struct fastrpc_user *user; 2364 unsigned long flags; 2365 2366 /* No invocations past this point */ 2367 spin_lock_irqsave(&cctx->lock, flags); 2368 cctx->rpdev = NULL; 2369 list_for_each_entry(user, &cctx->users, user) 2370 fastrpc_notify_users(user); 2371 spin_unlock_irqrestore(&cctx->lock, flags); 2372 2373 if (cctx->fdevice) 2374 misc_deregister(&cctx->fdevice->miscdev); 2375 2376 if (cctx->secure_fdevice) 2377 misc_deregister(&cctx->secure_fdevice->miscdev); 2378 2379 list_for_each_entry_safe(buf, b, &cctx->invoke_interrupted_mmaps, node) 2380 list_del(&buf->node); 2381 2382 if (cctx->remote_heap) 2383 fastrpc_buf_free(cctx->remote_heap); 2384 2385 of_platform_depopulate(&rpdev->dev); 2386 2387 fastrpc_channel_ctx_put(cctx); 2388 } 2389 2390 static int fastrpc_rpmsg_callback(struct rpmsg_device *rpdev, void *data, 2391 int len, void *priv, u32 addr) 2392 { 2393 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); 2394 struct fastrpc_invoke_rsp *rsp = data; 2395 struct fastrpc_invoke_ctx *ctx; 2396 unsigned long flags; 2397 unsigned long ctxid; 2398 2399 if (len < sizeof(*rsp)) 2400 return -EINVAL; 2401 2402 ctxid = ((rsp->ctx & FASTRPC_CTXID_MASK) >> 4); 2403 2404 spin_lock_irqsave(&cctx->lock, flags); 2405 ctx = idr_find(&cctx->ctx_idr, ctxid); 2406 spin_unlock_irqrestore(&cctx->lock, flags); 2407 2408 if (!ctx) { 2409 dev_err(&rpdev->dev, "No context ID matches response\n"); 2410 return -ENOENT; 2411 } 2412 2413 ctx->retval = rsp->retval; 2414 complete(&ctx->work); 2415 2416 /* 2417 * The DMA buffer associated with the context cannot be freed in 2418 * interrupt context so schedule it through a worker thread to 2419 * avoid a kernel BUG. 2420 */ 2421 schedule_work(&ctx->put_work); 2422 2423 return 0; 2424 } 2425 2426 static const struct of_device_id fastrpc_rpmsg_of_match[] = { 2427 { .compatible = "qcom,fastrpc" }, 2428 { }, 2429 }; 2430 MODULE_DEVICE_TABLE(of, fastrpc_rpmsg_of_match); 2431 2432 static struct rpmsg_driver fastrpc_driver = { 2433 .probe = fastrpc_rpmsg_probe, 2434 .remove = fastrpc_rpmsg_remove, 2435 .callback = fastrpc_rpmsg_callback, 2436 .drv = { 2437 .name = "qcom,fastrpc", 2438 .of_match_table = fastrpc_rpmsg_of_match, 2439 }, 2440 }; 2441 2442 static int fastrpc_init(void) 2443 { 2444 int ret; 2445 2446 ret = platform_driver_register(&fastrpc_cb_driver); 2447 if (ret < 0) { 2448 pr_err("fastrpc: failed to register cb driver\n"); 2449 return ret; 2450 } 2451 2452 ret = register_rpmsg_driver(&fastrpc_driver); 2453 if (ret < 0) { 2454 pr_err("fastrpc: failed to register rpmsg driver\n"); 2455 platform_driver_unregister(&fastrpc_cb_driver); 2456 return ret; 2457 } 2458 2459 return 0; 2460 } 2461 module_init(fastrpc_init); 2462 2463 static void fastrpc_exit(void) 2464 { 2465 platform_driver_unregister(&fastrpc_cb_driver); 2466 unregister_rpmsg_driver(&fastrpc_driver); 2467 } 2468 module_exit(fastrpc_exit); 2469 2470 MODULE_LICENSE("GPL v2"); 2471 MODULE_IMPORT_NS(DMA_BUF); 2472