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 #include <linux/bits.h> 26 27 #define ADSP_DOMAIN_ID (0) 28 #define MDSP_DOMAIN_ID (1) 29 #define SDSP_DOMAIN_ID (2) 30 #define CDSP_DOMAIN_ID (3) 31 #define GDSP_DOMAIN_ID (4) 32 #define FASTRPC_MAX_SESSIONS 14 33 #define FASTRPC_MAX_VMIDS 16 34 #define FASTRPC_ALIGN 128 35 #define FASTRPC_MAX_FDLIST 16 36 #define FASTRPC_MAX_CRCLIST 64 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 struct fastrpc_phy_page { 109 dma_addr_t addr; /* dma address */ 110 u64 size; /* size of contiguous region */ 111 }; 112 113 struct fastrpc_invoke_buf { 114 u32 num; /* number of contiguous regions */ 115 u32 pgidx; /* index to start of contiguous region */ 116 }; 117 118 struct fastrpc_remote_dmahandle { 119 s32 fd; /* dma handle fd */ 120 u32 offset; /* dma handle offset */ 121 u32 len; /* dma handle length */ 122 }; 123 124 struct fastrpc_remote_buf { 125 u64 pv; /* buffer pointer */ 126 u64 len; /* length of buffer */ 127 }; 128 129 union fastrpc_remote_arg { 130 struct fastrpc_remote_buf buf; 131 struct fastrpc_remote_dmahandle dma; 132 }; 133 134 struct fastrpc_mmap_rsp_msg { 135 u64 vaddr; 136 }; 137 138 struct fastrpc_mmap_req_msg { 139 s32 client_id; 140 u32 flags; 141 u64 vaddr; 142 s32 num; 143 }; 144 145 struct fastrpc_mem_map_req_msg { 146 s32 client_id; 147 s32 fd; 148 s32 offset; 149 u32 flags; 150 u64 vaddrin; 151 s32 num; 152 s32 data_len; 153 }; 154 155 struct fastrpc_munmap_req_msg { 156 s32 client_id; 157 u64 vaddr; 158 u64 size; 159 }; 160 161 struct fastrpc_mem_unmap_req_msg { 162 s32 client_id; 163 s32 fd; 164 u64 vaddrin; 165 u64 len; 166 }; 167 168 struct fastrpc_msg { 169 int client_id; /* process client id */ 170 int tid; /* thread id */ 171 u64 ctx; /* invoke caller context */ 172 u32 handle; /* handle to invoke */ 173 u32 sc; /* scalars structure describing the data */ 174 dma_addr_t addr; /* dma address */ 175 u64 size; /* size of contiguous region */ 176 }; 177 178 struct fastrpc_invoke_rsp { 179 u64 ctx; /* invoke caller context */ 180 int retval; /* invoke return value */ 181 }; 182 183 struct fastrpc_buf_overlap { 184 u64 start; 185 u64 end; 186 int raix; 187 u64 mstart; 188 u64 mend; 189 u64 offset; 190 }; 191 192 struct fastrpc_buf { 193 struct fastrpc_user *fl; 194 struct dma_buf *dmabuf; 195 struct device *dev; 196 void *virt; 197 dma_addr_t dma_addr; 198 u64 size; 199 /* Lock for dma buf attachments */ 200 struct mutex lock; 201 struct list_head attachments; 202 /* mmap support */ 203 struct list_head node; /* list of user requested mmaps */ 204 uintptr_t raddr; 205 }; 206 207 struct fastrpc_dma_buf_attachment { 208 struct device *dev; 209 struct sg_table sgt; 210 struct list_head node; 211 }; 212 213 struct fastrpc_map { 214 struct list_head node; 215 struct fastrpc_user *fl; 216 int fd; 217 struct dma_buf *buf; 218 struct sg_table *table; 219 struct dma_buf_attachment *attach; 220 dma_addr_t dma_addr; 221 u64 size; 222 void *va; 223 u64 len; 224 u64 raddr; 225 u32 attr; 226 struct kref refcount; 227 }; 228 229 struct fastrpc_invoke_ctx { 230 int nscalars; 231 int nbufs; 232 int retval; 233 int pid; 234 int client_id; 235 u32 sc; 236 u32 *crc; 237 u64 ctxid; 238 u64 msg_sz; 239 struct kref refcount; 240 struct list_head node; /* list of ctxs */ 241 struct completion work; 242 struct work_struct put_work; 243 struct fastrpc_msg msg; 244 struct fastrpc_user *fl; 245 union fastrpc_remote_arg *rpra; 246 struct fastrpc_map **maps; 247 struct fastrpc_buf *buf; 248 struct fastrpc_invoke_args *args; 249 struct fastrpc_buf_overlap *olaps; 250 struct fastrpc_channel_ctx *cctx; 251 }; 252 253 struct fastrpc_session_ctx { 254 struct device *dev; 255 int sid; 256 bool used; 257 bool valid; 258 }; 259 260 struct fastrpc_soc_data { 261 u32 sid_pos; 262 u32 dma_addr_bits_cdsp; 263 u32 dma_addr_bits_default; 264 }; 265 266 struct fastrpc_channel_ctx { 267 int domain_id; 268 int sesscount; 269 int vmcount; 270 struct qcom_scm_vmperm vmperms[FASTRPC_MAX_VMIDS]; 271 struct rpmsg_device *rpdev; 272 struct fastrpc_session_ctx session[FASTRPC_MAX_SESSIONS]; 273 spinlock_t lock; 274 struct idr ctx_idr; 275 struct list_head users; 276 struct kref refcount; 277 /* Flag if dsp attributes are cached */ 278 bool valid_attributes; 279 u32 dsp_attributes[FASTRPC_MAX_DSP_ATTRIBUTES]; 280 struct fastrpc_device *secure_fdevice; 281 struct fastrpc_device *fdevice; 282 struct fastrpc_buf *remote_heap; 283 struct list_head invoke_interrupted_mmaps; 284 bool secure; 285 bool unsigned_support; 286 u64 dma_mask; 287 const struct fastrpc_soc_data *soc_data; 288 }; 289 290 struct fastrpc_device { 291 struct fastrpc_channel_ctx *cctx; 292 struct miscdevice miscdev; 293 bool secure; 294 }; 295 296 struct fastrpc_user { 297 struct list_head user; 298 struct list_head maps; 299 struct list_head pending; 300 struct list_head mmaps; 301 302 struct fastrpc_channel_ctx *cctx; 303 struct fastrpc_session_ctx *sctx; 304 struct fastrpc_buf *init_mem; 305 306 int client_id; 307 int pd; 308 bool is_secure_dev; 309 /* Lock for lists */ 310 spinlock_t lock; 311 /* lock for allocations */ 312 struct mutex mutex; 313 }; 314 315 /* Extract SMMU PA from consolidated IOVA */ 316 static inline dma_addr_t fastrpc_ipa_to_dma_addr(struct fastrpc_channel_ctx *cctx, dma_addr_t iova) 317 { 318 if (!cctx->soc_data->sid_pos) 319 return 0; 320 return iova & GENMASK_ULL(cctx->soc_data->sid_pos - 1, 0); 321 } 322 323 /* 324 * Prepare the consolidated iova to send to DSP by prepending the SID 325 * to smmu PA at the appropriate position 326 */ 327 static inline u64 fastrpc_sid_offset(struct fastrpc_channel_ctx *cctx, 328 struct fastrpc_session_ctx *sctx) 329 { 330 return (u64)sctx->sid << cctx->soc_data->sid_pos; 331 } 332 333 static void fastrpc_free_map(struct kref *ref) 334 { 335 struct fastrpc_map *map; 336 337 map = container_of(ref, struct fastrpc_map, refcount); 338 339 if (map->table) { 340 if (map->attr & FASTRPC_ATTR_SECUREMAP) { 341 struct qcom_scm_vmperm perm; 342 int vmid = map->fl->cctx->vmperms[0].vmid; 343 u64 src_perms = BIT(QCOM_SCM_VMID_HLOS) | BIT(vmid); 344 int err = 0; 345 346 perm.vmid = QCOM_SCM_VMID_HLOS; 347 perm.perm = QCOM_SCM_PERM_RWX; 348 err = qcom_scm_assign_mem(map->dma_addr, map->len, 349 &src_perms, &perm, 1); 350 if (err) { 351 dev_err(map->fl->sctx->dev, 352 "Failed to assign memory dma_addr %pad size 0x%llx err %d\n", 353 &map->dma_addr, map->len, err); 354 return; 355 } 356 } 357 dma_buf_unmap_attachment_unlocked(map->attach, map->table, 358 DMA_BIDIRECTIONAL); 359 dma_buf_detach(map->buf, map->attach); 360 dma_buf_put(map->buf); 361 } 362 363 if (map->fl) { 364 spin_lock(&map->fl->lock); 365 list_del(&map->node); 366 spin_unlock(&map->fl->lock); 367 map->fl = NULL; 368 } 369 370 kfree(map); 371 } 372 373 static void fastrpc_map_put(struct fastrpc_map *map) 374 { 375 if (map) 376 kref_put(&map->refcount, fastrpc_free_map); 377 } 378 379 static int fastrpc_map_get(struct fastrpc_map *map) 380 { 381 if (!map) 382 return -ENOENT; 383 384 return kref_get_unless_zero(&map->refcount) ? 0 : -ENOENT; 385 } 386 387 388 static int fastrpc_map_lookup(struct fastrpc_user *fl, int fd, 389 struct fastrpc_map **ppmap) 390 { 391 struct fastrpc_map *map = NULL; 392 struct dma_buf *buf; 393 int ret = -ENOENT; 394 395 buf = dma_buf_get(fd); 396 if (IS_ERR(buf)) 397 return PTR_ERR(buf); 398 399 spin_lock(&fl->lock); 400 list_for_each_entry(map, &fl->maps, node) { 401 if (map->fd != fd || map->buf != buf) 402 continue; 403 404 *ppmap = map; 405 ret = 0; 406 break; 407 } 408 spin_unlock(&fl->lock); 409 410 dma_buf_put(buf); 411 412 return ret; 413 } 414 415 static void fastrpc_buf_free(struct fastrpc_buf *buf) 416 { 417 dma_free_coherent(buf->dev, buf->size, buf->virt, 418 fastrpc_ipa_to_dma_addr(buf->fl->cctx, buf->dma_addr)); 419 kfree(buf); 420 } 421 422 static int __fastrpc_buf_alloc(struct fastrpc_user *fl, struct device *dev, 423 u64 size, struct fastrpc_buf **obuf) 424 { 425 struct fastrpc_buf *buf; 426 427 buf = kzalloc(sizeof(*buf), GFP_KERNEL); 428 if (!buf) 429 return -ENOMEM; 430 431 INIT_LIST_HEAD(&buf->attachments); 432 INIT_LIST_HEAD(&buf->node); 433 mutex_init(&buf->lock); 434 435 buf->fl = fl; 436 buf->virt = NULL; 437 buf->dma_addr = 0; 438 buf->size = size; 439 buf->dev = dev; 440 buf->raddr = 0; 441 442 buf->virt = dma_alloc_coherent(dev, buf->size, &buf->dma_addr, 443 GFP_KERNEL); 444 if (!buf->virt) { 445 mutex_destroy(&buf->lock); 446 kfree(buf); 447 return -ENOMEM; 448 } 449 450 *obuf = buf; 451 452 return 0; 453 } 454 455 static int fastrpc_buf_alloc(struct fastrpc_user *fl, struct device *dev, 456 u64 size, struct fastrpc_buf **obuf) 457 { 458 int ret; 459 struct fastrpc_buf *buf; 460 461 ret = __fastrpc_buf_alloc(fl, dev, size, obuf); 462 if (ret) 463 return ret; 464 465 buf = *obuf; 466 467 if (fl->sctx && fl->sctx->sid) 468 buf->dma_addr += fastrpc_sid_offset(fl->cctx, fl->sctx); 469 470 return 0; 471 } 472 473 static int fastrpc_remote_heap_alloc(struct fastrpc_user *fl, struct device *dev, 474 u64 size, struct fastrpc_buf **obuf) 475 { 476 struct device *rdev = &fl->cctx->rpdev->dev; 477 478 return __fastrpc_buf_alloc(fl, rdev, size, obuf); 479 } 480 481 static void fastrpc_channel_ctx_free(struct kref *ref) 482 { 483 struct fastrpc_channel_ctx *cctx; 484 485 cctx = container_of(ref, struct fastrpc_channel_ctx, refcount); 486 487 kfree(cctx); 488 } 489 490 static void fastrpc_channel_ctx_get(struct fastrpc_channel_ctx *cctx) 491 { 492 kref_get(&cctx->refcount); 493 } 494 495 static void fastrpc_channel_ctx_put(struct fastrpc_channel_ctx *cctx) 496 { 497 kref_put(&cctx->refcount, fastrpc_channel_ctx_free); 498 } 499 500 static void fastrpc_context_free(struct kref *ref) 501 { 502 struct fastrpc_invoke_ctx *ctx; 503 struct fastrpc_channel_ctx *cctx; 504 unsigned long flags; 505 int i; 506 507 ctx = container_of(ref, struct fastrpc_invoke_ctx, refcount); 508 cctx = ctx->cctx; 509 510 for (i = 0; i < ctx->nbufs; i++) 511 fastrpc_map_put(ctx->maps[i]); 512 513 if (ctx->buf) 514 fastrpc_buf_free(ctx->buf); 515 516 spin_lock_irqsave(&cctx->lock, flags); 517 idr_remove(&cctx->ctx_idr, ctx->ctxid >> 4); 518 spin_unlock_irqrestore(&cctx->lock, flags); 519 520 kfree(ctx->maps); 521 kfree(ctx->olaps); 522 kfree(ctx); 523 524 fastrpc_channel_ctx_put(cctx); 525 } 526 527 static void fastrpc_context_get(struct fastrpc_invoke_ctx *ctx) 528 { 529 kref_get(&ctx->refcount); 530 } 531 532 static void fastrpc_context_put(struct fastrpc_invoke_ctx *ctx) 533 { 534 kref_put(&ctx->refcount, fastrpc_context_free); 535 } 536 537 static void fastrpc_context_put_wq(struct work_struct *work) 538 { 539 struct fastrpc_invoke_ctx *ctx = 540 container_of(work, struct fastrpc_invoke_ctx, put_work); 541 542 fastrpc_context_put(ctx); 543 } 544 545 #define CMP(aa, bb) ((aa) == (bb) ? 0 : (aa) < (bb) ? -1 : 1) 546 static int olaps_cmp(const void *a, const void *b) 547 { 548 struct fastrpc_buf_overlap *pa = (struct fastrpc_buf_overlap *)a; 549 struct fastrpc_buf_overlap *pb = (struct fastrpc_buf_overlap *)b; 550 /* sort with lowest starting buffer first */ 551 int st = CMP(pa->start, pb->start); 552 /* sort with highest ending buffer first */ 553 int ed = CMP(pb->end, pa->end); 554 555 return st == 0 ? ed : st; 556 } 557 558 static void fastrpc_get_buff_overlaps(struct fastrpc_invoke_ctx *ctx) 559 { 560 u64 max_end = 0; 561 int i; 562 563 for (i = 0; i < ctx->nbufs; ++i) { 564 ctx->olaps[i].start = ctx->args[i].ptr; 565 ctx->olaps[i].end = ctx->olaps[i].start + ctx->args[i].length; 566 ctx->olaps[i].raix = i; 567 } 568 569 sort(ctx->olaps, ctx->nbufs, sizeof(*ctx->olaps), olaps_cmp, NULL); 570 571 for (i = 0; i < ctx->nbufs; ++i) { 572 /* Falling inside previous range */ 573 if (ctx->olaps[i].start < max_end) { 574 ctx->olaps[i].mstart = max_end; 575 ctx->olaps[i].mend = ctx->olaps[i].end; 576 ctx->olaps[i].offset = max_end - ctx->olaps[i].start; 577 578 if (ctx->olaps[i].end > max_end) { 579 max_end = ctx->olaps[i].end; 580 } else { 581 ctx->olaps[i].mend = 0; 582 ctx->olaps[i].mstart = 0; 583 } 584 585 } else { 586 ctx->olaps[i].mend = ctx->olaps[i].end; 587 ctx->olaps[i].mstart = ctx->olaps[i].start; 588 ctx->olaps[i].offset = 0; 589 max_end = ctx->olaps[i].end; 590 } 591 } 592 } 593 594 static struct fastrpc_invoke_ctx *fastrpc_context_alloc( 595 struct fastrpc_user *user, u32 kernel, u32 sc, 596 struct fastrpc_invoke_args *args) 597 { 598 struct fastrpc_channel_ctx *cctx = user->cctx; 599 struct fastrpc_invoke_ctx *ctx = NULL; 600 unsigned long flags; 601 int ret; 602 603 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 604 if (!ctx) 605 return ERR_PTR(-ENOMEM); 606 607 INIT_LIST_HEAD(&ctx->node); 608 ctx->fl = user; 609 ctx->nscalars = REMOTE_SCALARS_LENGTH(sc); 610 ctx->nbufs = REMOTE_SCALARS_INBUFS(sc) + 611 REMOTE_SCALARS_OUTBUFS(sc); 612 613 if (ctx->nscalars) { 614 ctx->maps = kcalloc(ctx->nscalars, 615 sizeof(*ctx->maps), GFP_KERNEL); 616 if (!ctx->maps) { 617 kfree(ctx); 618 return ERR_PTR(-ENOMEM); 619 } 620 ctx->olaps = kcalloc(ctx->nscalars, 621 sizeof(*ctx->olaps), GFP_KERNEL); 622 if (!ctx->olaps) { 623 kfree(ctx->maps); 624 kfree(ctx); 625 return ERR_PTR(-ENOMEM); 626 } 627 ctx->args = args; 628 fastrpc_get_buff_overlaps(ctx); 629 } 630 631 /* Released in fastrpc_context_put() */ 632 fastrpc_channel_ctx_get(cctx); 633 634 ctx->sc = sc; 635 ctx->retval = -1; 636 ctx->pid = current->pid; 637 ctx->client_id = user->client_id; 638 ctx->cctx = cctx; 639 init_completion(&ctx->work); 640 INIT_WORK(&ctx->put_work, fastrpc_context_put_wq); 641 642 spin_lock(&user->lock); 643 list_add_tail(&ctx->node, &user->pending); 644 spin_unlock(&user->lock); 645 646 spin_lock_irqsave(&cctx->lock, flags); 647 ret = idr_alloc_cyclic(&cctx->ctx_idr, ctx, 1, 648 FASTRPC_CTX_MAX, GFP_ATOMIC); 649 if (ret < 0) { 650 spin_unlock_irqrestore(&cctx->lock, flags); 651 goto err_idr; 652 } 653 ctx->ctxid = ret << 4; 654 spin_unlock_irqrestore(&cctx->lock, flags); 655 656 kref_init(&ctx->refcount); 657 658 return ctx; 659 err_idr: 660 spin_lock(&user->lock); 661 list_del(&ctx->node); 662 spin_unlock(&user->lock); 663 fastrpc_channel_ctx_put(cctx); 664 kfree(ctx->maps); 665 kfree(ctx->olaps); 666 kfree(ctx); 667 668 return ERR_PTR(ret); 669 } 670 671 static struct sg_table * 672 fastrpc_map_dma_buf(struct dma_buf_attachment *attachment, 673 enum dma_data_direction dir) 674 { 675 struct fastrpc_dma_buf_attachment *a = attachment->priv; 676 struct sg_table *table; 677 int ret; 678 679 table = &a->sgt; 680 681 ret = dma_map_sgtable(attachment->dev, table, dir, 0); 682 if (ret) 683 table = ERR_PTR(ret); 684 return table; 685 } 686 687 static void fastrpc_unmap_dma_buf(struct dma_buf_attachment *attach, 688 struct sg_table *table, 689 enum dma_data_direction dir) 690 { 691 dma_unmap_sgtable(attach->dev, table, dir, 0); 692 } 693 694 static void fastrpc_release(struct dma_buf *dmabuf) 695 { 696 struct fastrpc_buf *buffer = dmabuf->priv; 697 698 fastrpc_buf_free(buffer); 699 } 700 701 static int fastrpc_dma_buf_attach(struct dma_buf *dmabuf, 702 struct dma_buf_attachment *attachment) 703 { 704 struct fastrpc_dma_buf_attachment *a; 705 struct fastrpc_buf *buffer = dmabuf->priv; 706 int ret; 707 708 a = kzalloc(sizeof(*a), GFP_KERNEL); 709 if (!a) 710 return -ENOMEM; 711 712 ret = dma_get_sgtable(buffer->dev, &a->sgt, buffer->virt, 713 fastrpc_ipa_to_dma_addr(buffer->fl->cctx, buffer->dma_addr), 714 buffer->size); 715 if (ret < 0) { 716 dev_err(buffer->dev, "failed to get scatterlist from DMA API\n"); 717 kfree(a); 718 return -EINVAL; 719 } 720 721 a->dev = attachment->dev; 722 INIT_LIST_HEAD(&a->node); 723 attachment->priv = a; 724 725 mutex_lock(&buffer->lock); 726 list_add(&a->node, &buffer->attachments); 727 mutex_unlock(&buffer->lock); 728 729 return 0; 730 } 731 732 static void fastrpc_dma_buf_detatch(struct dma_buf *dmabuf, 733 struct dma_buf_attachment *attachment) 734 { 735 struct fastrpc_dma_buf_attachment *a = attachment->priv; 736 struct fastrpc_buf *buffer = dmabuf->priv; 737 738 mutex_lock(&buffer->lock); 739 list_del(&a->node); 740 mutex_unlock(&buffer->lock); 741 sg_free_table(&a->sgt); 742 kfree(a); 743 } 744 745 static int fastrpc_vmap(struct dma_buf *dmabuf, struct iosys_map *map) 746 { 747 struct fastrpc_buf *buf = dmabuf->priv; 748 749 iosys_map_set_vaddr(map, buf->virt); 750 751 return 0; 752 } 753 754 static int fastrpc_mmap(struct dma_buf *dmabuf, 755 struct vm_area_struct *vma) 756 { 757 struct fastrpc_buf *buf = dmabuf->priv; 758 size_t size = vma->vm_end - vma->vm_start; 759 760 dma_resv_assert_held(dmabuf->resv); 761 762 return dma_mmap_coherent(buf->dev, vma, buf->virt, 763 fastrpc_ipa_to_dma_addr(buf->fl->cctx, buf->dma_addr), size); 764 } 765 766 static const struct dma_buf_ops fastrpc_dma_buf_ops = { 767 .attach = fastrpc_dma_buf_attach, 768 .detach = fastrpc_dma_buf_detatch, 769 .map_dma_buf = fastrpc_map_dma_buf, 770 .unmap_dma_buf = fastrpc_unmap_dma_buf, 771 .mmap = fastrpc_mmap, 772 .vmap = fastrpc_vmap, 773 .release = fastrpc_release, 774 }; 775 776 static dma_addr_t fastrpc_compute_dma_addr(struct fastrpc_user *fl, dma_addr_t sg_dma_addr) 777 { 778 return sg_dma_addr + fastrpc_sid_offset(fl->cctx, fl->sctx); 779 } 780 781 static int fastrpc_map_attach(struct fastrpc_user *fl, int fd, 782 u64 len, u32 attr, struct fastrpc_map **ppmap) 783 { 784 struct fastrpc_session_ctx *sess = fl->sctx; 785 struct fastrpc_map *map = NULL; 786 struct sg_table *table; 787 struct scatterlist *sgl = NULL; 788 int err = 0, sgl_index = 0; 789 790 map = kzalloc(sizeof(*map), GFP_KERNEL); 791 if (!map) 792 return -ENOMEM; 793 794 INIT_LIST_HEAD(&map->node); 795 kref_init(&map->refcount); 796 797 map->fl = fl; 798 map->fd = fd; 799 map->buf = dma_buf_get(fd); 800 if (IS_ERR(map->buf)) { 801 err = PTR_ERR(map->buf); 802 goto get_err; 803 } 804 805 map->attach = dma_buf_attach(map->buf, sess->dev); 806 if (IS_ERR(map->attach)) { 807 dev_err(sess->dev, "Failed to attach dmabuf\n"); 808 err = PTR_ERR(map->attach); 809 goto attach_err; 810 } 811 812 table = dma_buf_map_attachment_unlocked(map->attach, DMA_BIDIRECTIONAL); 813 if (IS_ERR(table)) { 814 err = PTR_ERR(table); 815 goto map_err; 816 } 817 map->table = table; 818 819 if (attr & FASTRPC_ATTR_SECUREMAP) 820 map->dma_addr = sg_phys(map->table->sgl); 821 else 822 map->dma_addr = fastrpc_compute_dma_addr(fl, sg_dma_address(map->table->sgl)); 823 for_each_sg(map->table->sgl, sgl, map->table->nents, 824 sgl_index) 825 map->size += sg_dma_len(sgl); 826 if (len > map->size) { 827 dev_dbg(sess->dev, "Bad size passed len 0x%llx map size 0x%llx\n", 828 len, map->size); 829 err = -EINVAL; 830 goto map_err; 831 } 832 map->va = sg_virt(map->table->sgl); 833 map->len = len; 834 835 if (attr & FASTRPC_ATTR_SECUREMAP) { 836 /* 837 * If subsystem VMIDs are defined in DTSI, then do 838 * hyp_assign from HLOS to those VM(s) 839 */ 840 u64 src_perms = BIT(QCOM_SCM_VMID_HLOS); 841 struct qcom_scm_vmperm dst_perms[2] = {0}; 842 843 dst_perms[0].vmid = QCOM_SCM_VMID_HLOS; 844 dst_perms[0].perm = QCOM_SCM_PERM_RW; 845 dst_perms[1].vmid = fl->cctx->vmperms[0].vmid; 846 dst_perms[1].perm = QCOM_SCM_PERM_RWX; 847 map->attr = attr; 848 err = qcom_scm_assign_mem(map->dma_addr, (u64)map->len, &src_perms, dst_perms, 2); 849 if (err) { 850 dev_err(sess->dev, 851 "Failed to assign memory with dma_addr %pad size 0x%llx err %d\n", 852 &map->dma_addr, map->len, err); 853 goto map_err; 854 } 855 } 856 spin_lock(&fl->lock); 857 list_add_tail(&map->node, &fl->maps); 858 spin_unlock(&fl->lock); 859 *ppmap = map; 860 861 return 0; 862 863 map_err: 864 dma_buf_detach(map->buf, map->attach); 865 attach_err: 866 dma_buf_put(map->buf); 867 get_err: 868 fastrpc_map_put(map); 869 870 return err; 871 } 872 873 static int fastrpc_map_create(struct fastrpc_user *fl, int fd, 874 u64 len, u32 attr, struct fastrpc_map **ppmap) 875 { 876 struct fastrpc_session_ctx *sess = fl->sctx; 877 int err = 0; 878 879 if (!fastrpc_map_lookup(fl, fd, ppmap)) { 880 if (!fastrpc_map_get(*ppmap)) 881 return 0; 882 dev_dbg(sess->dev, "%s: Failed to get map fd=%d\n", 883 __func__, fd); 884 } 885 886 err = fastrpc_map_attach(fl, fd, len, attr, ppmap); 887 888 return err; 889 } 890 891 /* 892 * Fastrpc payload buffer with metadata looks like: 893 * 894 * >>>>>> START of METADATA <<<<<<<<< 895 * +---------------------------------+ 896 * | Arguments | 897 * | type:(union fastrpc_remote_arg)| 898 * | (0 - N) | 899 * +---------------------------------+ 900 * | Invoke Buffer list | 901 * | type:(struct fastrpc_invoke_buf)| 902 * | (0 - N) | 903 * +---------------------------------+ 904 * | Page info list | 905 * | type:(struct fastrpc_phy_page) | 906 * | (0 - N) | 907 * +---------------------------------+ 908 * | Optional info | 909 * |(can be specific to SoC/Firmware)| 910 * +---------------------------------+ 911 * >>>>>>>> END of METADATA <<<<<<<<< 912 * +---------------------------------+ 913 * | Inline ARGS | 914 * | (0-N) | 915 * +---------------------------------+ 916 */ 917 918 static int fastrpc_get_meta_size(struct fastrpc_invoke_ctx *ctx) 919 { 920 int size = 0; 921 922 size = (sizeof(struct fastrpc_remote_buf) + 923 sizeof(struct fastrpc_invoke_buf) + 924 sizeof(struct fastrpc_phy_page)) * ctx->nscalars + 925 sizeof(u64) * FASTRPC_MAX_FDLIST + 926 sizeof(u32) * FASTRPC_MAX_CRCLIST; 927 928 return size; 929 } 930 931 static u64 fastrpc_get_payload_size(struct fastrpc_invoke_ctx *ctx, int metalen) 932 { 933 u64 size = 0; 934 int oix; 935 936 size = ALIGN(metalen, FASTRPC_ALIGN); 937 for (oix = 0; oix < ctx->nbufs; oix++) { 938 int i = ctx->olaps[oix].raix; 939 940 if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1) { 941 942 if (ctx->olaps[oix].offset == 0) 943 size = ALIGN(size, FASTRPC_ALIGN); 944 945 size += (ctx->olaps[oix].mend - ctx->olaps[oix].mstart); 946 } 947 } 948 949 return size; 950 } 951 952 static int fastrpc_create_maps(struct fastrpc_invoke_ctx *ctx) 953 { 954 struct device *dev = ctx->fl->sctx->dev; 955 int i, err; 956 957 for (i = 0; i < ctx->nscalars; ++i) { 958 959 if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1 || 960 ctx->args[i].length == 0) 961 continue; 962 963 if (i < ctx->nbufs) 964 err = fastrpc_map_create(ctx->fl, ctx->args[i].fd, 965 ctx->args[i].length, ctx->args[i].attr, &ctx->maps[i]); 966 else 967 err = fastrpc_map_attach(ctx->fl, ctx->args[i].fd, 968 ctx->args[i].length, ctx->args[i].attr, &ctx->maps[i]); 969 if (err) { 970 dev_err(dev, "Error Creating map %d\n", err); 971 return -EINVAL; 972 } 973 974 } 975 return 0; 976 } 977 978 static struct fastrpc_invoke_buf *fastrpc_invoke_buf_start(union fastrpc_remote_arg *pra, int len) 979 { 980 return (struct fastrpc_invoke_buf *)(&pra[len]); 981 } 982 983 static struct fastrpc_phy_page *fastrpc_phy_page_start(struct fastrpc_invoke_buf *buf, int len) 984 { 985 return (struct fastrpc_phy_page *)(&buf[len]); 986 } 987 988 static int fastrpc_get_args(u32 kernel, struct fastrpc_invoke_ctx *ctx) 989 { 990 struct device *dev = ctx->fl->sctx->dev; 991 union fastrpc_remote_arg *rpra; 992 struct fastrpc_invoke_buf *list; 993 struct fastrpc_phy_page *pages; 994 int inbufs, i, oix, err = 0; 995 u64 len, rlen, pkt_size; 996 u64 pg_start, pg_end; 997 uintptr_t args; 998 int metalen; 999 1000 inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); 1001 metalen = fastrpc_get_meta_size(ctx); 1002 pkt_size = fastrpc_get_payload_size(ctx, metalen); 1003 1004 err = fastrpc_create_maps(ctx); 1005 if (err) 1006 return err; 1007 1008 ctx->msg_sz = pkt_size; 1009 1010 if (ctx->fl->sctx->sid) 1011 err = fastrpc_buf_alloc(ctx->fl, dev, pkt_size, &ctx->buf); 1012 else 1013 err = fastrpc_remote_heap_alloc(ctx->fl, dev, pkt_size, &ctx->buf); 1014 if (err) 1015 return err; 1016 1017 memset(ctx->buf->virt, 0, pkt_size); 1018 rpra = ctx->buf->virt; 1019 list = fastrpc_invoke_buf_start(rpra, ctx->nscalars); 1020 pages = fastrpc_phy_page_start(list, ctx->nscalars); 1021 args = (uintptr_t)ctx->buf->virt + metalen; 1022 rlen = pkt_size - metalen; 1023 ctx->rpra = rpra; 1024 1025 for (oix = 0; oix < ctx->nbufs; ++oix) { 1026 int mlen; 1027 1028 i = ctx->olaps[oix].raix; 1029 len = ctx->args[i].length; 1030 1031 rpra[i].buf.pv = 0; 1032 rpra[i].buf.len = len; 1033 list[i].num = len ? 1 : 0; 1034 list[i].pgidx = i; 1035 1036 if (!len) 1037 continue; 1038 1039 if (ctx->maps[i]) { 1040 struct vm_area_struct *vma = NULL; 1041 1042 rpra[i].buf.pv = (u64) ctx->args[i].ptr; 1043 pages[i].addr = ctx->maps[i]->dma_addr; 1044 1045 mmap_read_lock(current->mm); 1046 vma = find_vma(current->mm, ctx->args[i].ptr); 1047 if (vma) 1048 pages[i].addr += (ctx->args[i].ptr & PAGE_MASK) - 1049 vma->vm_start; 1050 mmap_read_unlock(current->mm); 1051 1052 pg_start = (ctx->args[i].ptr & PAGE_MASK) >> PAGE_SHIFT; 1053 pg_end = ((ctx->args[i].ptr + len - 1) & PAGE_MASK) >> 1054 PAGE_SHIFT; 1055 pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; 1056 1057 } else { 1058 1059 if (ctx->olaps[oix].offset == 0) { 1060 rlen -= ALIGN(args, FASTRPC_ALIGN) - args; 1061 args = ALIGN(args, FASTRPC_ALIGN); 1062 } 1063 1064 mlen = ctx->olaps[oix].mend - ctx->olaps[oix].mstart; 1065 1066 if (rlen < mlen) 1067 goto bail; 1068 1069 rpra[i].buf.pv = args - ctx->olaps[oix].offset; 1070 pages[i].addr = ctx->buf->dma_addr - 1071 ctx->olaps[oix].offset + 1072 (pkt_size - rlen); 1073 pages[i].addr = pages[i].addr & PAGE_MASK; 1074 1075 pg_start = (rpra[i].buf.pv & PAGE_MASK) >> PAGE_SHIFT; 1076 pg_end = ((rpra[i].buf.pv + len - 1) & PAGE_MASK) >> PAGE_SHIFT; 1077 pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; 1078 args = args + mlen; 1079 rlen -= mlen; 1080 } 1081 1082 if (i < inbufs && !ctx->maps[i]) { 1083 void *dst = (void *)(uintptr_t)rpra[i].buf.pv; 1084 void *src = (void *)(uintptr_t)ctx->args[i].ptr; 1085 1086 if (!kernel) { 1087 if (copy_from_user(dst, (void __user *)src, 1088 len)) { 1089 err = -EFAULT; 1090 goto bail; 1091 } 1092 } else { 1093 memcpy(dst, src, len); 1094 } 1095 } 1096 } 1097 1098 for (i = ctx->nbufs; i < ctx->nscalars; ++i) { 1099 list[i].num = ctx->args[i].length ? 1 : 0; 1100 list[i].pgidx = i; 1101 if (ctx->maps[i]) { 1102 pages[i].addr = ctx->maps[i]->dma_addr; 1103 pages[i].size = ctx->maps[i]->size; 1104 } 1105 rpra[i].dma.fd = ctx->args[i].fd; 1106 rpra[i].dma.len = ctx->args[i].length; 1107 rpra[i].dma.offset = (u64) ctx->args[i].ptr; 1108 } 1109 1110 bail: 1111 if (err) 1112 dev_err(dev, "Error: get invoke args failed:%d\n", err); 1113 1114 return err; 1115 } 1116 1117 static int fastrpc_put_args(struct fastrpc_invoke_ctx *ctx, 1118 u32 kernel) 1119 { 1120 union fastrpc_remote_arg *rpra = ctx->rpra; 1121 struct fastrpc_user *fl = ctx->fl; 1122 struct fastrpc_map *mmap = NULL; 1123 struct fastrpc_invoke_buf *list; 1124 struct fastrpc_phy_page *pages; 1125 u64 *fdlist; 1126 int i, inbufs, outbufs, handles; 1127 int ret = 0; 1128 1129 inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); 1130 outbufs = REMOTE_SCALARS_OUTBUFS(ctx->sc); 1131 handles = REMOTE_SCALARS_INHANDLES(ctx->sc) + REMOTE_SCALARS_OUTHANDLES(ctx->sc); 1132 list = fastrpc_invoke_buf_start(rpra, ctx->nscalars); 1133 pages = fastrpc_phy_page_start(list, ctx->nscalars); 1134 fdlist = (uint64_t *)(pages + inbufs + outbufs + handles); 1135 1136 for (i = inbufs; i < ctx->nbufs; ++i) { 1137 if (!ctx->maps[i]) { 1138 void *src = (void *)(uintptr_t)rpra[i].buf.pv; 1139 void *dst = (void *)(uintptr_t)ctx->args[i].ptr; 1140 u64 len = rpra[i].buf.len; 1141 1142 if (!kernel) { 1143 if (copy_to_user((void __user *)dst, src, len)) { 1144 ret = -EFAULT; 1145 goto cleanup_fdlist; 1146 } 1147 } else { 1148 memcpy(dst, src, len); 1149 } 1150 } 1151 } 1152 1153 cleanup_fdlist: 1154 /* Clean up fdlist which is updated by DSP */ 1155 for (i = 0; i < FASTRPC_MAX_FDLIST; i++) { 1156 if (!fdlist[i]) 1157 break; 1158 if (!fastrpc_map_lookup(fl, (int)fdlist[i], &mmap)) 1159 fastrpc_map_put(mmap); 1160 } 1161 1162 return ret; 1163 } 1164 1165 static int fastrpc_invoke_send(struct fastrpc_session_ctx *sctx, 1166 struct fastrpc_invoke_ctx *ctx, 1167 u32 kernel, uint32_t handle) 1168 { 1169 struct fastrpc_channel_ctx *cctx; 1170 struct fastrpc_user *fl = ctx->fl; 1171 struct fastrpc_msg *msg = &ctx->msg; 1172 int ret; 1173 1174 cctx = fl->cctx; 1175 msg->client_id = fl->client_id; 1176 msg->tid = current->pid; 1177 1178 if (kernel) 1179 msg->client_id = 0; 1180 1181 msg->ctx = ctx->ctxid | fl->pd; 1182 msg->handle = handle; 1183 msg->sc = ctx->sc; 1184 msg->addr = ctx->buf ? ctx->buf->dma_addr : 0; 1185 msg->size = roundup(ctx->msg_sz, PAGE_SIZE); 1186 fastrpc_context_get(ctx); 1187 1188 ret = rpmsg_send(cctx->rpdev->ept, (void *)msg, sizeof(*msg)); 1189 1190 if (ret) 1191 fastrpc_context_put(ctx); 1192 1193 return ret; 1194 1195 } 1196 1197 static int fastrpc_internal_invoke(struct fastrpc_user *fl, u32 kernel, 1198 u32 handle, u32 sc, 1199 struct fastrpc_invoke_args *args) 1200 { 1201 struct fastrpc_invoke_ctx *ctx = NULL; 1202 struct fastrpc_buf *buf, *b; 1203 1204 int err = 0; 1205 1206 if (!fl->sctx) 1207 return -EINVAL; 1208 1209 if (!fl->cctx->rpdev) 1210 return -EPIPE; 1211 1212 if (handle == FASTRPC_INIT_HANDLE && !kernel) { 1213 dev_warn_ratelimited(fl->sctx->dev, "user app trying to send a kernel RPC message (%d)\n", handle); 1214 return -EPERM; 1215 } 1216 1217 ctx = fastrpc_context_alloc(fl, kernel, sc, args); 1218 if (IS_ERR(ctx)) 1219 return PTR_ERR(ctx); 1220 1221 err = fastrpc_get_args(kernel, ctx); 1222 if (err) 1223 goto bail; 1224 1225 /* make sure that all CPU memory writes are seen by DSP */ 1226 dma_wmb(); 1227 /* Send invoke buffer to remote dsp */ 1228 err = fastrpc_invoke_send(fl->sctx, ctx, kernel, handle); 1229 if (err) 1230 goto bail; 1231 1232 if (kernel) { 1233 if (!wait_for_completion_timeout(&ctx->work, 10 * HZ)) 1234 err = -ETIMEDOUT; 1235 } else { 1236 err = wait_for_completion_interruptible(&ctx->work); 1237 } 1238 1239 if (err) 1240 goto bail; 1241 1242 /* make sure that all memory writes by DSP are seen by CPU */ 1243 dma_rmb(); 1244 /* populate all the output buffers with results */ 1245 err = fastrpc_put_args(ctx, kernel); 1246 if (err) 1247 goto bail; 1248 1249 /* Check the response from remote dsp */ 1250 err = ctx->retval; 1251 if (err) 1252 goto bail; 1253 1254 bail: 1255 if (err != -ERESTARTSYS && err != -ETIMEDOUT) { 1256 /* We are done with this compute context */ 1257 spin_lock(&fl->lock); 1258 list_del(&ctx->node); 1259 spin_unlock(&fl->lock); 1260 fastrpc_context_put(ctx); 1261 } 1262 1263 if (err == -ERESTARTSYS) { 1264 list_for_each_entry_safe(buf, b, &fl->mmaps, node) { 1265 list_del(&buf->node); 1266 list_add_tail(&buf->node, &fl->cctx->invoke_interrupted_mmaps); 1267 } 1268 } 1269 1270 if (err) 1271 dev_dbg(fl->sctx->dev, "Error: Invoke Failed %d\n", err); 1272 1273 return err; 1274 } 1275 1276 static bool is_session_rejected(struct fastrpc_user *fl, bool unsigned_pd_request) 1277 { 1278 /* Check if the device node is non-secure and channel is secure*/ 1279 if (!fl->is_secure_dev && fl->cctx->secure) { 1280 /* 1281 * Allow untrusted applications to offload only to Unsigned PD when 1282 * channel is configured as secure and block untrusted apps on channel 1283 * that does not support unsigned PD offload 1284 */ 1285 if (!fl->cctx->unsigned_support || !unsigned_pd_request) { 1286 dev_err(&fl->cctx->rpdev->dev, "Error: Untrusted application trying to offload to signed PD\n"); 1287 return true; 1288 } 1289 } 1290 1291 return false; 1292 } 1293 1294 static int fastrpc_init_create_static_process(struct fastrpc_user *fl, 1295 char __user *argp) 1296 { 1297 struct fastrpc_init_create_static init; 1298 struct fastrpc_invoke_args *args; 1299 struct fastrpc_phy_page pages[1]; 1300 char *name; 1301 int err; 1302 bool scm_done = false; 1303 struct { 1304 int client_id; 1305 u32 namelen; 1306 u32 pageslen; 1307 } inbuf; 1308 u32 sc; 1309 1310 args = kcalloc(FASTRPC_CREATE_STATIC_PROCESS_NARGS, sizeof(*args), GFP_KERNEL); 1311 if (!args) 1312 return -ENOMEM; 1313 1314 if (copy_from_user(&init, argp, sizeof(init))) { 1315 err = -EFAULT; 1316 goto err; 1317 } 1318 1319 if (init.namelen > INIT_FILE_NAMELEN_MAX) { 1320 err = -EINVAL; 1321 goto err; 1322 } 1323 1324 name = memdup_user(u64_to_user_ptr(init.name), init.namelen); 1325 if (IS_ERR(name)) { 1326 err = PTR_ERR(name); 1327 goto err; 1328 } 1329 1330 if (!fl->cctx->remote_heap) { 1331 err = fastrpc_remote_heap_alloc(fl, fl->sctx->dev, init.memlen, 1332 &fl->cctx->remote_heap); 1333 if (err) 1334 goto err_name; 1335 1336 /* Map if we have any heap VMIDs associated with this ADSP Static Process. */ 1337 if (fl->cctx->vmcount) { 1338 u64 src_perms = BIT(QCOM_SCM_VMID_HLOS); 1339 1340 err = qcom_scm_assign_mem(fl->cctx->remote_heap->dma_addr, 1341 (u64)fl->cctx->remote_heap->size, 1342 &src_perms, 1343 fl->cctx->vmperms, fl->cctx->vmcount); 1344 if (err) { 1345 dev_err(fl->sctx->dev, 1346 "Failed to assign memory with dma_addr %pad size 0x%llx err %d\n", 1347 &fl->cctx->remote_heap->dma_addr, 1348 fl->cctx->remote_heap->size, err); 1349 goto err_map; 1350 } 1351 scm_done = true; 1352 } 1353 } 1354 1355 inbuf.client_id = fl->client_id; 1356 inbuf.namelen = init.namelen; 1357 inbuf.pageslen = 0; 1358 fl->pd = USER_PD; 1359 1360 args[0].ptr = (u64)(uintptr_t)&inbuf; 1361 args[0].length = sizeof(inbuf); 1362 args[0].fd = -1; 1363 1364 args[1].ptr = (u64)(uintptr_t)name; 1365 args[1].length = inbuf.namelen; 1366 args[1].fd = -1; 1367 1368 pages[0].addr = fl->cctx->remote_heap->dma_addr; 1369 pages[0].size = fl->cctx->remote_heap->size; 1370 1371 args[2].ptr = (u64)(uintptr_t) pages; 1372 args[2].length = sizeof(*pages); 1373 args[2].fd = -1; 1374 1375 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE_STATIC, 3, 0); 1376 1377 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1378 sc, args); 1379 if (err) 1380 goto err_invoke; 1381 1382 kfree(args); 1383 kfree(name); 1384 1385 return 0; 1386 err_invoke: 1387 if (fl->cctx->vmcount && scm_done) { 1388 u64 src_perms = 0; 1389 struct qcom_scm_vmperm dst_perms; 1390 u32 i; 1391 1392 for (i = 0; i < fl->cctx->vmcount; i++) 1393 src_perms |= BIT(fl->cctx->vmperms[i].vmid); 1394 1395 dst_perms.vmid = QCOM_SCM_VMID_HLOS; 1396 dst_perms.perm = QCOM_SCM_PERM_RWX; 1397 err = qcom_scm_assign_mem(fl->cctx->remote_heap->dma_addr, 1398 (u64)fl->cctx->remote_heap->size, 1399 &src_perms, &dst_perms, 1); 1400 if (err) 1401 dev_err(fl->sctx->dev, "Failed to assign memory dma_addr %pad size 0x%llx err %d\n", 1402 &fl->cctx->remote_heap->dma_addr, fl->cctx->remote_heap->size, err); 1403 } 1404 err_map: 1405 fastrpc_buf_free(fl->cctx->remote_heap); 1406 err_name: 1407 kfree(name); 1408 err: 1409 kfree(args); 1410 1411 return err; 1412 } 1413 1414 static int fastrpc_init_create_process(struct fastrpc_user *fl, 1415 char __user *argp) 1416 { 1417 struct fastrpc_init_create init; 1418 struct fastrpc_invoke_args *args; 1419 struct fastrpc_phy_page pages[1]; 1420 struct fastrpc_map *map = NULL; 1421 struct fastrpc_buf *imem = NULL; 1422 int memlen; 1423 int err; 1424 struct { 1425 int client_id; 1426 u32 namelen; 1427 u32 filelen; 1428 u32 pageslen; 1429 u32 attrs; 1430 u32 siglen; 1431 } inbuf; 1432 u32 sc; 1433 bool unsigned_module = false; 1434 1435 args = kcalloc(FASTRPC_CREATE_PROCESS_NARGS, sizeof(*args), GFP_KERNEL); 1436 if (!args) 1437 return -ENOMEM; 1438 1439 if (copy_from_user(&init, argp, sizeof(init))) { 1440 err = -EFAULT; 1441 goto err; 1442 } 1443 1444 if (init.attrs & FASTRPC_MODE_UNSIGNED_MODULE) 1445 unsigned_module = true; 1446 1447 if (is_session_rejected(fl, unsigned_module)) { 1448 err = -ECONNREFUSED; 1449 goto err; 1450 } 1451 1452 if (init.filelen > INIT_FILELEN_MAX) { 1453 err = -EINVAL; 1454 goto err; 1455 } 1456 1457 inbuf.client_id = fl->client_id; 1458 inbuf.namelen = strlen(current->comm) + 1; 1459 inbuf.filelen = init.filelen; 1460 inbuf.pageslen = 1; 1461 inbuf.attrs = init.attrs; 1462 inbuf.siglen = init.siglen; 1463 fl->pd = USER_PD; 1464 1465 if (init.filelen && init.filefd) { 1466 err = fastrpc_map_create(fl, init.filefd, init.filelen, 0, &map); 1467 if (err) 1468 goto err; 1469 } 1470 1471 memlen = ALIGN(max(INIT_FILELEN_MAX, (int)init.filelen * 4), 1472 1024 * 1024); 1473 err = fastrpc_buf_alloc(fl, fl->sctx->dev, memlen, 1474 &imem); 1475 if (err) 1476 goto err_alloc; 1477 1478 fl->init_mem = imem; 1479 args[0].ptr = (u64)(uintptr_t)&inbuf; 1480 args[0].length = sizeof(inbuf); 1481 args[0].fd = -1; 1482 1483 args[1].ptr = (u64)(uintptr_t)current->comm; 1484 args[1].length = inbuf.namelen; 1485 args[1].fd = -1; 1486 1487 args[2].ptr = (u64) init.file; 1488 args[2].length = inbuf.filelen; 1489 args[2].fd = init.filefd; 1490 1491 pages[0].addr = imem->dma_addr; 1492 pages[0].size = imem->size; 1493 1494 args[3].ptr = (u64)(uintptr_t) pages; 1495 args[3].length = 1 * sizeof(*pages); 1496 args[3].fd = -1; 1497 1498 args[4].ptr = (u64)(uintptr_t)&inbuf.attrs; 1499 args[4].length = sizeof(inbuf.attrs); 1500 args[4].fd = -1; 1501 1502 args[5].ptr = (u64)(uintptr_t) &inbuf.siglen; 1503 args[5].length = sizeof(inbuf.siglen); 1504 args[5].fd = -1; 1505 1506 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE, 4, 0); 1507 if (init.attrs) 1508 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE_ATTR, 4, 0); 1509 1510 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1511 sc, args); 1512 if (err) 1513 goto err_invoke; 1514 1515 kfree(args); 1516 1517 return 0; 1518 1519 err_invoke: 1520 fl->init_mem = NULL; 1521 fastrpc_buf_free(imem); 1522 err_alloc: 1523 fastrpc_map_put(map); 1524 err: 1525 kfree(args); 1526 1527 return err; 1528 } 1529 1530 static struct fastrpc_session_ctx *fastrpc_session_alloc( 1531 struct fastrpc_user *fl) 1532 { 1533 struct fastrpc_channel_ctx *cctx = fl->cctx; 1534 struct fastrpc_session_ctx *session = NULL; 1535 unsigned long flags; 1536 int i; 1537 1538 spin_lock_irqsave(&cctx->lock, flags); 1539 for (i = 0; i < cctx->sesscount; i++) { 1540 if (!cctx->session[i].used && cctx->session[i].valid) { 1541 cctx->session[i].used = true; 1542 session = &cctx->session[i]; 1543 /* any non-zero ID will work, session_idx + 1 is the simplest one */ 1544 fl->client_id = i + 1; 1545 break; 1546 } 1547 } 1548 spin_unlock_irqrestore(&cctx->lock, flags); 1549 1550 return session; 1551 } 1552 1553 static void fastrpc_session_free(struct fastrpc_channel_ctx *cctx, 1554 struct fastrpc_session_ctx *session) 1555 { 1556 unsigned long flags; 1557 1558 spin_lock_irqsave(&cctx->lock, flags); 1559 session->used = false; 1560 spin_unlock_irqrestore(&cctx->lock, flags); 1561 } 1562 1563 static int fastrpc_release_current_dsp_process(struct fastrpc_user *fl) 1564 { 1565 struct fastrpc_invoke_args args[1]; 1566 int client_id = 0; 1567 u32 sc; 1568 1569 client_id = fl->client_id; 1570 args[0].ptr = (u64)(uintptr_t) &client_id; 1571 args[0].length = sizeof(client_id); 1572 args[0].fd = -1; 1573 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_RELEASE, 1, 0); 1574 1575 return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1576 sc, &args[0]); 1577 } 1578 1579 static int fastrpc_device_release(struct inode *inode, struct file *file) 1580 { 1581 struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; 1582 struct fastrpc_channel_ctx *cctx = fl->cctx; 1583 struct fastrpc_invoke_ctx *ctx, *n; 1584 struct fastrpc_map *map, *m; 1585 struct fastrpc_buf *buf, *b; 1586 unsigned long flags; 1587 1588 fastrpc_release_current_dsp_process(fl); 1589 1590 spin_lock_irqsave(&cctx->lock, flags); 1591 list_del(&fl->user); 1592 spin_unlock_irqrestore(&cctx->lock, flags); 1593 1594 if (fl->init_mem) 1595 fastrpc_buf_free(fl->init_mem); 1596 1597 list_for_each_entry_safe(ctx, n, &fl->pending, node) { 1598 list_del(&ctx->node); 1599 fastrpc_context_put(ctx); 1600 } 1601 1602 list_for_each_entry_safe(map, m, &fl->maps, node) 1603 fastrpc_map_put(map); 1604 1605 list_for_each_entry_safe(buf, b, &fl->mmaps, node) { 1606 list_del(&buf->node); 1607 fastrpc_buf_free(buf); 1608 } 1609 1610 fastrpc_session_free(cctx, fl->sctx); 1611 fastrpc_channel_ctx_put(cctx); 1612 1613 mutex_destroy(&fl->mutex); 1614 kfree(fl); 1615 file->private_data = NULL; 1616 1617 return 0; 1618 } 1619 1620 static int fastrpc_device_open(struct inode *inode, struct file *filp) 1621 { 1622 struct fastrpc_channel_ctx *cctx; 1623 struct fastrpc_device *fdevice; 1624 struct fastrpc_user *fl = NULL; 1625 unsigned long flags; 1626 1627 fdevice = miscdev_to_fdevice(filp->private_data); 1628 cctx = fdevice->cctx; 1629 1630 fl = kzalloc(sizeof(*fl), GFP_KERNEL); 1631 if (!fl) 1632 return -ENOMEM; 1633 1634 /* Released in fastrpc_device_release() */ 1635 fastrpc_channel_ctx_get(cctx); 1636 1637 filp->private_data = fl; 1638 spin_lock_init(&fl->lock); 1639 mutex_init(&fl->mutex); 1640 INIT_LIST_HEAD(&fl->pending); 1641 INIT_LIST_HEAD(&fl->maps); 1642 INIT_LIST_HEAD(&fl->mmaps); 1643 INIT_LIST_HEAD(&fl->user); 1644 fl->cctx = cctx; 1645 fl->is_secure_dev = fdevice->secure; 1646 1647 fl->sctx = fastrpc_session_alloc(fl); 1648 if (!fl->sctx) { 1649 dev_err(&cctx->rpdev->dev, "No session available\n"); 1650 mutex_destroy(&fl->mutex); 1651 kfree(fl); 1652 1653 return -EBUSY; 1654 } 1655 1656 spin_lock_irqsave(&cctx->lock, flags); 1657 list_add_tail(&fl->user, &cctx->users); 1658 spin_unlock_irqrestore(&cctx->lock, flags); 1659 1660 return 0; 1661 } 1662 1663 static int fastrpc_dmabuf_alloc(struct fastrpc_user *fl, char __user *argp) 1664 { 1665 struct fastrpc_alloc_dma_buf bp; 1666 DEFINE_DMA_BUF_EXPORT_INFO(exp_info); 1667 struct fastrpc_buf *buf = NULL; 1668 int err; 1669 1670 if (copy_from_user(&bp, argp, sizeof(bp))) 1671 return -EFAULT; 1672 1673 err = fastrpc_buf_alloc(fl, fl->sctx->dev, bp.size, &buf); 1674 if (err) 1675 return err; 1676 exp_info.ops = &fastrpc_dma_buf_ops; 1677 exp_info.size = bp.size; 1678 exp_info.flags = O_RDWR; 1679 exp_info.priv = buf; 1680 buf->dmabuf = dma_buf_export(&exp_info); 1681 if (IS_ERR(buf->dmabuf)) { 1682 err = PTR_ERR(buf->dmabuf); 1683 fastrpc_buf_free(buf); 1684 return err; 1685 } 1686 1687 bp.fd = dma_buf_fd(buf->dmabuf, O_ACCMODE); 1688 if (bp.fd < 0) { 1689 dma_buf_put(buf->dmabuf); 1690 return -EINVAL; 1691 } 1692 1693 if (copy_to_user(argp, &bp, sizeof(bp))) { 1694 /* 1695 * The usercopy failed, but we can't do much about it, as 1696 * dma_buf_fd() already called fd_install() and made the 1697 * file descriptor accessible for the current process. It 1698 * might already be closed and dmabuf no longer valid when 1699 * we reach this point. Therefore "leak" the fd and rely on 1700 * the process exit path to do any required cleanup. 1701 */ 1702 return -EFAULT; 1703 } 1704 1705 return 0; 1706 } 1707 1708 static int fastrpc_init_attach(struct fastrpc_user *fl, int pd) 1709 { 1710 struct fastrpc_invoke_args args[1]; 1711 int client_id = fl->client_id; 1712 u32 sc; 1713 1714 args[0].ptr = (u64)(uintptr_t) &client_id; 1715 args[0].length = sizeof(client_id); 1716 args[0].fd = -1; 1717 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_ATTACH, 1, 0); 1718 fl->pd = pd; 1719 1720 return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1721 sc, &args[0]); 1722 } 1723 1724 static int fastrpc_invoke(struct fastrpc_user *fl, char __user *argp) 1725 { 1726 struct fastrpc_invoke_args *args = NULL; 1727 struct fastrpc_invoke inv; 1728 u32 nscalars; 1729 int err; 1730 1731 if (copy_from_user(&inv, argp, sizeof(inv))) 1732 return -EFAULT; 1733 1734 /* nscalars is truncated here to max supported value */ 1735 nscalars = REMOTE_SCALARS_LENGTH(inv.sc); 1736 if (nscalars) { 1737 args = kcalloc(nscalars, sizeof(*args), GFP_KERNEL); 1738 if (!args) 1739 return -ENOMEM; 1740 1741 if (copy_from_user(args, (void __user *)(uintptr_t)inv.args, 1742 nscalars * sizeof(*args))) { 1743 kfree(args); 1744 return -EFAULT; 1745 } 1746 } 1747 1748 err = fastrpc_internal_invoke(fl, false, inv.handle, inv.sc, args); 1749 kfree(args); 1750 1751 return err; 1752 } 1753 1754 static int fastrpc_get_info_from_dsp(struct fastrpc_user *fl, uint32_t *dsp_attr_buf, 1755 uint32_t dsp_attr_buf_len) 1756 { 1757 struct fastrpc_invoke_args args[2] = { 0 }; 1758 1759 /* 1760 * Capability filled in userspace. This carries the information 1761 * about the remoteproc support which is fetched from the remoteproc 1762 * sysfs node by userspace. 1763 */ 1764 dsp_attr_buf[0] = 0; 1765 dsp_attr_buf_len -= 1; 1766 1767 args[0].ptr = (u64)(uintptr_t)&dsp_attr_buf_len; 1768 args[0].length = sizeof(dsp_attr_buf_len); 1769 args[0].fd = -1; 1770 args[1].ptr = (u64)(uintptr_t)&dsp_attr_buf[1]; 1771 args[1].length = dsp_attr_buf_len * sizeof(u32); 1772 args[1].fd = -1; 1773 1774 return fastrpc_internal_invoke(fl, true, FASTRPC_DSP_UTILITIES_HANDLE, 1775 FASTRPC_SCALARS(0, 1, 1), args); 1776 } 1777 1778 static int fastrpc_get_info_from_kernel(struct fastrpc_ioctl_capability *cap, 1779 struct fastrpc_user *fl) 1780 { 1781 struct fastrpc_channel_ctx *cctx = fl->cctx; 1782 uint32_t attribute_id = cap->attribute_id; 1783 uint32_t *dsp_attributes; 1784 unsigned long flags; 1785 int err; 1786 1787 spin_lock_irqsave(&cctx->lock, flags); 1788 /* check if we already have queried dsp for attributes */ 1789 if (cctx->valid_attributes) { 1790 spin_unlock_irqrestore(&cctx->lock, flags); 1791 goto done; 1792 } 1793 spin_unlock_irqrestore(&cctx->lock, flags); 1794 1795 dsp_attributes = kzalloc(FASTRPC_MAX_DSP_ATTRIBUTES_LEN, GFP_KERNEL); 1796 if (!dsp_attributes) 1797 return -ENOMEM; 1798 1799 err = fastrpc_get_info_from_dsp(fl, dsp_attributes, FASTRPC_MAX_DSP_ATTRIBUTES); 1800 if (err == DSP_UNSUPPORTED_API) { 1801 dev_info(&cctx->rpdev->dev, 1802 "Warning: DSP capabilities not supported\n"); 1803 kfree(dsp_attributes); 1804 return -EOPNOTSUPP; 1805 } else if (err) { 1806 dev_err(&cctx->rpdev->dev, "Error: dsp information is incorrect err: %d\n", err); 1807 kfree(dsp_attributes); 1808 return err; 1809 } 1810 1811 spin_lock_irqsave(&cctx->lock, flags); 1812 memcpy(cctx->dsp_attributes, dsp_attributes, FASTRPC_MAX_DSP_ATTRIBUTES_LEN); 1813 cctx->valid_attributes = true; 1814 spin_unlock_irqrestore(&cctx->lock, flags); 1815 kfree(dsp_attributes); 1816 done: 1817 cap->capability = cctx->dsp_attributes[attribute_id]; 1818 return 0; 1819 } 1820 1821 static int fastrpc_get_dsp_info(struct fastrpc_user *fl, char __user *argp) 1822 { 1823 struct fastrpc_ioctl_capability cap = {0}; 1824 int err = 0; 1825 1826 if (copy_from_user(&cap, argp, sizeof(cap))) 1827 return -EFAULT; 1828 1829 cap.capability = 0; 1830 1831 if (cap.attribute_id >= FASTRPC_MAX_DSP_ATTRIBUTES) { 1832 dev_err(&fl->cctx->rpdev->dev, "Error: invalid attribute: %d, err: %d\n", 1833 cap.attribute_id, err); 1834 return -EOVERFLOW; 1835 } 1836 1837 err = fastrpc_get_info_from_kernel(&cap, fl); 1838 if (err) 1839 return err; 1840 1841 if (copy_to_user(argp, &cap, sizeof(cap))) 1842 return -EFAULT; 1843 1844 return 0; 1845 } 1846 1847 static int fastrpc_req_munmap_impl(struct fastrpc_user *fl, struct fastrpc_buf *buf) 1848 { 1849 struct fastrpc_invoke_args args[1] = { [0] = { 0 } }; 1850 struct fastrpc_munmap_req_msg req_msg; 1851 struct device *dev = fl->sctx->dev; 1852 int err; 1853 u32 sc; 1854 1855 req_msg.client_id = fl->client_id; 1856 req_msg.size = buf->size; 1857 req_msg.vaddr = buf->raddr; 1858 1859 args[0].ptr = (u64) (uintptr_t) &req_msg; 1860 args[0].length = sizeof(req_msg); 1861 1862 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MUNMAP, 1, 0); 1863 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, 1864 &args[0]); 1865 if (!err) { 1866 dev_dbg(dev, "unmmap\tpt 0x%09lx OK\n", buf->raddr); 1867 spin_lock(&fl->lock); 1868 list_del(&buf->node); 1869 spin_unlock(&fl->lock); 1870 fastrpc_buf_free(buf); 1871 } else { 1872 dev_err(dev, "unmmap\tpt 0x%09lx ERROR\n", buf->raddr); 1873 } 1874 1875 return err; 1876 } 1877 1878 static int fastrpc_req_munmap(struct fastrpc_user *fl, char __user *argp) 1879 { 1880 struct fastrpc_buf *buf = NULL, *iter, *b; 1881 struct fastrpc_req_munmap req; 1882 struct device *dev = fl->sctx->dev; 1883 1884 if (copy_from_user(&req, argp, sizeof(req))) 1885 return -EFAULT; 1886 1887 spin_lock(&fl->lock); 1888 list_for_each_entry_safe(iter, b, &fl->mmaps, node) { 1889 if ((iter->raddr == req.vaddrout) && (iter->size == req.size)) { 1890 buf = iter; 1891 break; 1892 } 1893 } 1894 spin_unlock(&fl->lock); 1895 1896 if (!buf) { 1897 dev_err(dev, "mmap\t\tpt 0x%09llx [len 0x%08llx] not in list\n", 1898 req.vaddrout, req.size); 1899 return -EINVAL; 1900 } 1901 1902 return fastrpc_req_munmap_impl(fl, buf); 1903 } 1904 1905 static int fastrpc_req_mmap(struct fastrpc_user *fl, char __user *argp) 1906 { 1907 struct fastrpc_invoke_args args[3] = { [0 ... 2] = { 0 } }; 1908 struct fastrpc_buf *buf = NULL; 1909 struct fastrpc_mmap_req_msg req_msg; 1910 struct fastrpc_mmap_rsp_msg rsp_msg; 1911 struct fastrpc_phy_page pages; 1912 struct fastrpc_req_mmap req; 1913 struct device *dev = fl->sctx->dev; 1914 int err; 1915 u32 sc; 1916 1917 if (copy_from_user(&req, argp, sizeof(req))) 1918 return -EFAULT; 1919 1920 if (req.flags != ADSP_MMAP_ADD_PAGES && req.flags != ADSP_MMAP_REMOTE_HEAP_ADDR) { 1921 dev_err(dev, "flag not supported 0x%x\n", req.flags); 1922 1923 return -EINVAL; 1924 } 1925 1926 if (req.vaddrin) { 1927 dev_err(dev, "adding user allocated pages is not supported\n"); 1928 return -EINVAL; 1929 } 1930 1931 if (req.flags == ADSP_MMAP_REMOTE_HEAP_ADDR) 1932 err = fastrpc_remote_heap_alloc(fl, dev, req.size, &buf); 1933 else 1934 err = fastrpc_buf_alloc(fl, dev, req.size, &buf); 1935 1936 if (err) { 1937 dev_err(dev, "failed to allocate buffer\n"); 1938 return err; 1939 } 1940 1941 req_msg.client_id = fl->client_id; 1942 req_msg.flags = req.flags; 1943 req_msg.vaddr = req.vaddrin; 1944 req_msg.num = sizeof(pages); 1945 1946 args[0].ptr = (u64) (uintptr_t) &req_msg; 1947 args[0].length = sizeof(req_msg); 1948 1949 pages.addr = buf->dma_addr; 1950 pages.size = buf->size; 1951 1952 args[1].ptr = (u64) (uintptr_t) &pages; 1953 args[1].length = sizeof(pages); 1954 1955 args[2].ptr = (u64) (uintptr_t) &rsp_msg; 1956 args[2].length = sizeof(rsp_msg); 1957 1958 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MMAP, 2, 1); 1959 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, 1960 &args[0]); 1961 if (err) { 1962 dev_err(dev, "mmap error (len 0x%08llx)\n", buf->size); 1963 fastrpc_buf_free(buf); 1964 return err; 1965 } 1966 1967 /* update the buffer to be able to deallocate the memory on the DSP */ 1968 buf->raddr = (uintptr_t) rsp_msg.vaddr; 1969 1970 /* let the client know the address to use */ 1971 req.vaddrout = rsp_msg.vaddr; 1972 1973 /* Add memory to static PD pool, protection thru hypervisor */ 1974 if (req.flags == ADSP_MMAP_REMOTE_HEAP_ADDR && fl->cctx->vmcount) { 1975 u64 src_perms = BIT(QCOM_SCM_VMID_HLOS); 1976 1977 err = qcom_scm_assign_mem(buf->dma_addr, (u64)buf->size, 1978 &src_perms, fl->cctx->vmperms, fl->cctx->vmcount); 1979 if (err) { 1980 dev_err(fl->sctx->dev, 1981 "Failed to assign memory dma_addr %pad size 0x%llx err %d", 1982 &buf->dma_addr, buf->size, err); 1983 goto err_assign; 1984 } 1985 } 1986 1987 spin_lock(&fl->lock); 1988 list_add_tail(&buf->node, &fl->mmaps); 1989 spin_unlock(&fl->lock); 1990 1991 if (copy_to_user((void __user *)argp, &req, sizeof(req))) { 1992 err = -EFAULT; 1993 goto err_assign; 1994 } 1995 1996 dev_dbg(dev, "mmap\t\tpt 0x%09lx OK [len 0x%08llx]\n", 1997 buf->raddr, buf->size); 1998 1999 return 0; 2000 2001 err_assign: 2002 fastrpc_req_munmap_impl(fl, buf); 2003 2004 return err; 2005 } 2006 2007 static int fastrpc_req_mem_unmap_impl(struct fastrpc_user *fl, struct fastrpc_mem_unmap *req) 2008 { 2009 struct fastrpc_invoke_args args[1] = { [0] = { 0 } }; 2010 struct fastrpc_map *map = NULL, *iter, *m; 2011 struct fastrpc_mem_unmap_req_msg req_msg = { 0 }; 2012 int err = 0; 2013 u32 sc; 2014 struct device *dev = fl->sctx->dev; 2015 2016 spin_lock(&fl->lock); 2017 list_for_each_entry_safe(iter, m, &fl->maps, node) { 2018 if ((req->fd < 0 || iter->fd == req->fd) && (iter->raddr == req->vaddr)) { 2019 map = iter; 2020 break; 2021 } 2022 } 2023 2024 spin_unlock(&fl->lock); 2025 2026 if (!map) { 2027 dev_err(dev, "map not in list\n"); 2028 return -EINVAL; 2029 } 2030 2031 req_msg.client_id = fl->client_id; 2032 req_msg.len = map->len; 2033 req_msg.vaddrin = map->raddr; 2034 req_msg.fd = map->fd; 2035 2036 args[0].ptr = (u64) (uintptr_t) &req_msg; 2037 args[0].length = sizeof(req_msg); 2038 2039 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MEM_UNMAP, 1, 0); 2040 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, 2041 &args[0]); 2042 if (err) { 2043 dev_err(dev, "unmmap\tpt fd = %d, 0x%09llx error\n", map->fd, map->raddr); 2044 return err; 2045 } 2046 fastrpc_map_put(map); 2047 2048 return 0; 2049 } 2050 2051 static int fastrpc_req_mem_unmap(struct fastrpc_user *fl, char __user *argp) 2052 { 2053 struct fastrpc_mem_unmap req; 2054 2055 if (copy_from_user(&req, argp, sizeof(req))) 2056 return -EFAULT; 2057 2058 return fastrpc_req_mem_unmap_impl(fl, &req); 2059 } 2060 2061 static int fastrpc_req_mem_map(struct fastrpc_user *fl, char __user *argp) 2062 { 2063 struct fastrpc_invoke_args args[4] = { [0 ... 3] = { 0 } }; 2064 struct fastrpc_mem_map_req_msg req_msg = { 0 }; 2065 struct fastrpc_mmap_rsp_msg rsp_msg = { 0 }; 2066 struct fastrpc_mem_unmap req_unmap = { 0 }; 2067 struct fastrpc_phy_page pages = { 0 }; 2068 struct fastrpc_mem_map req; 2069 struct device *dev = fl->sctx->dev; 2070 struct fastrpc_map *map = NULL; 2071 int err; 2072 u32 sc; 2073 2074 if (copy_from_user(&req, argp, sizeof(req))) 2075 return -EFAULT; 2076 2077 /* create SMMU mapping */ 2078 err = fastrpc_map_create(fl, req.fd, req.length, 0, &map); 2079 if (err) { 2080 dev_err(dev, "failed to map buffer, fd = %d\n", req.fd); 2081 return err; 2082 } 2083 2084 req_msg.client_id = fl->client_id; 2085 req_msg.fd = req.fd; 2086 req_msg.offset = req.offset; 2087 req_msg.vaddrin = req.vaddrin; 2088 map->va = (void *) (uintptr_t) req.vaddrin; 2089 req_msg.flags = req.flags; 2090 req_msg.num = sizeof(pages); 2091 req_msg.data_len = 0; 2092 2093 args[0].ptr = (u64) (uintptr_t) &req_msg; 2094 args[0].length = sizeof(req_msg); 2095 2096 pages.addr = map->dma_addr; 2097 pages.size = map->len; 2098 2099 args[1].ptr = (u64) (uintptr_t) &pages; 2100 args[1].length = sizeof(pages); 2101 2102 args[2].ptr = (u64) (uintptr_t) &pages; 2103 args[2].length = 0; 2104 2105 args[3].ptr = (u64) (uintptr_t) &rsp_msg; 2106 args[3].length = sizeof(rsp_msg); 2107 2108 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MEM_MAP, 3, 1); 2109 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, &args[0]); 2110 if (err) { 2111 dev_err(dev, "mem mmap error, fd %d, vaddr %llx, size %lld\n", 2112 req.fd, req.vaddrin, map->len); 2113 goto err_invoke; 2114 } 2115 2116 /* update the buffer to be able to deallocate the memory on the DSP */ 2117 map->raddr = rsp_msg.vaddr; 2118 2119 /* let the client know the address to use */ 2120 req.vaddrout = rsp_msg.vaddr; 2121 2122 if (copy_to_user((void __user *)argp, &req, sizeof(req))) { 2123 /* unmap the memory and release the buffer */ 2124 req_unmap.vaddr = (uintptr_t) rsp_msg.vaddr; 2125 req_unmap.length = map->len; 2126 fastrpc_req_mem_unmap_impl(fl, &req_unmap); 2127 return -EFAULT; 2128 } 2129 2130 return 0; 2131 2132 err_invoke: 2133 fastrpc_map_put(map); 2134 2135 return err; 2136 } 2137 2138 static long fastrpc_device_ioctl(struct file *file, unsigned int cmd, 2139 unsigned long arg) 2140 { 2141 struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; 2142 char __user *argp = (char __user *)arg; 2143 int err; 2144 2145 switch (cmd) { 2146 case FASTRPC_IOCTL_INVOKE: 2147 err = fastrpc_invoke(fl, argp); 2148 break; 2149 case FASTRPC_IOCTL_INIT_ATTACH: 2150 err = fastrpc_init_attach(fl, ROOT_PD); 2151 break; 2152 case FASTRPC_IOCTL_INIT_ATTACH_SNS: 2153 err = fastrpc_init_attach(fl, SENSORS_PD); 2154 break; 2155 case FASTRPC_IOCTL_INIT_CREATE_STATIC: 2156 err = fastrpc_init_create_static_process(fl, argp); 2157 break; 2158 case FASTRPC_IOCTL_INIT_CREATE: 2159 err = fastrpc_init_create_process(fl, argp); 2160 break; 2161 case FASTRPC_IOCTL_ALLOC_DMA_BUFF: 2162 err = fastrpc_dmabuf_alloc(fl, argp); 2163 break; 2164 case FASTRPC_IOCTL_MMAP: 2165 err = fastrpc_req_mmap(fl, argp); 2166 break; 2167 case FASTRPC_IOCTL_MUNMAP: 2168 err = fastrpc_req_munmap(fl, argp); 2169 break; 2170 case FASTRPC_IOCTL_MEM_MAP: 2171 err = fastrpc_req_mem_map(fl, argp); 2172 break; 2173 case FASTRPC_IOCTL_MEM_UNMAP: 2174 err = fastrpc_req_mem_unmap(fl, argp); 2175 break; 2176 case FASTRPC_IOCTL_GET_DSP_INFO: 2177 err = fastrpc_get_dsp_info(fl, argp); 2178 break; 2179 default: 2180 err = -ENOTTY; 2181 break; 2182 } 2183 2184 return err; 2185 } 2186 2187 static const struct file_operations fastrpc_fops = { 2188 .open = fastrpc_device_open, 2189 .release = fastrpc_device_release, 2190 .unlocked_ioctl = fastrpc_device_ioctl, 2191 .compat_ioctl = fastrpc_device_ioctl, 2192 }; 2193 2194 static int fastrpc_cb_probe(struct platform_device *pdev) 2195 { 2196 struct fastrpc_channel_ctx *cctx; 2197 struct fastrpc_session_ctx *sess; 2198 struct device *dev = &pdev->dev; 2199 int i, sessions = 0; 2200 unsigned long flags; 2201 int rc; 2202 u32 dma_bits; 2203 2204 cctx = dev_get_drvdata(dev->parent); 2205 if (!cctx) 2206 return -EINVAL; 2207 2208 of_property_read_u32(dev->of_node, "qcom,nsessions", &sessions); 2209 2210 spin_lock_irqsave(&cctx->lock, flags); 2211 if (cctx->sesscount >= FASTRPC_MAX_SESSIONS) { 2212 dev_err(&pdev->dev, "too many sessions\n"); 2213 spin_unlock_irqrestore(&cctx->lock, flags); 2214 return -ENOSPC; 2215 } 2216 dma_bits = cctx->soc_data->dma_addr_bits_default; 2217 sess = &cctx->session[cctx->sesscount++]; 2218 sess->used = false; 2219 sess->valid = true; 2220 sess->dev = dev; 2221 dev_set_drvdata(dev, sess); 2222 2223 if (cctx->domain_id == CDSP_DOMAIN_ID) 2224 dma_bits = cctx->soc_data->dma_addr_bits_cdsp; 2225 2226 if (of_property_read_u32(dev->of_node, "reg", &sess->sid)) 2227 dev_info(dev, "FastRPC Session ID not specified in DT\n"); 2228 2229 if (sessions > 0) { 2230 struct fastrpc_session_ctx *dup_sess; 2231 2232 for (i = 1; i < sessions; i++) { 2233 if (cctx->sesscount >= FASTRPC_MAX_SESSIONS) 2234 break; 2235 dup_sess = &cctx->session[cctx->sesscount++]; 2236 memcpy(dup_sess, sess, sizeof(*dup_sess)); 2237 } 2238 } 2239 spin_unlock_irqrestore(&cctx->lock, flags); 2240 rc = dma_set_mask(dev, DMA_BIT_MASK(dma_bits)); 2241 if (rc) { 2242 dev_err(dev, "%u-bit DMA enable failed\n", dma_bits); 2243 return rc; 2244 } 2245 2246 return 0; 2247 } 2248 2249 static void fastrpc_cb_remove(struct platform_device *pdev) 2250 { 2251 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(pdev->dev.parent); 2252 struct fastrpc_session_ctx *sess = dev_get_drvdata(&pdev->dev); 2253 unsigned long flags; 2254 int i; 2255 2256 spin_lock_irqsave(&cctx->lock, flags); 2257 for (i = 0; i < FASTRPC_MAX_SESSIONS; i++) { 2258 if (cctx->session[i].sid == sess->sid) { 2259 cctx->session[i].valid = false; 2260 cctx->sesscount--; 2261 } 2262 } 2263 spin_unlock_irqrestore(&cctx->lock, flags); 2264 } 2265 2266 static const struct of_device_id fastrpc_match_table[] = { 2267 { .compatible = "qcom,fastrpc-compute-cb", }, 2268 {} 2269 }; 2270 2271 static struct platform_driver fastrpc_cb_driver = { 2272 .probe = fastrpc_cb_probe, 2273 .remove = fastrpc_cb_remove, 2274 .driver = { 2275 .name = "qcom,fastrpc-cb", 2276 .of_match_table = fastrpc_match_table, 2277 .suppress_bind_attrs = true, 2278 }, 2279 }; 2280 2281 static int fastrpc_device_register(struct device *dev, struct fastrpc_channel_ctx *cctx, 2282 bool is_secured, const char *domain) 2283 { 2284 struct fastrpc_device *fdev; 2285 int err; 2286 2287 fdev = devm_kzalloc(dev, sizeof(*fdev), GFP_KERNEL); 2288 if (!fdev) 2289 return -ENOMEM; 2290 2291 fdev->secure = is_secured; 2292 fdev->cctx = cctx; 2293 fdev->miscdev.minor = MISC_DYNAMIC_MINOR; 2294 fdev->miscdev.fops = &fastrpc_fops; 2295 fdev->miscdev.name = devm_kasprintf(dev, GFP_KERNEL, "fastrpc-%s%s", 2296 domain, is_secured ? "-secure" : ""); 2297 if (!fdev->miscdev.name) 2298 return -ENOMEM; 2299 2300 err = misc_register(&fdev->miscdev); 2301 if (!err) { 2302 if (is_secured) 2303 cctx->secure_fdevice = fdev; 2304 else 2305 cctx->fdevice = fdev; 2306 } 2307 2308 return err; 2309 } 2310 2311 static int fastrpc_get_domain_id(const char *domain) 2312 { 2313 if (!strncmp(domain, "adsp", 4)) 2314 return ADSP_DOMAIN_ID; 2315 else if (!strncmp(domain, "cdsp", 4)) 2316 return CDSP_DOMAIN_ID; 2317 else if (!strncmp(domain, "mdsp", 4)) 2318 return MDSP_DOMAIN_ID; 2319 else if (!strncmp(domain, "sdsp", 4)) 2320 return SDSP_DOMAIN_ID; 2321 else if (!strncmp(domain, "gdsp", 4)) 2322 return GDSP_DOMAIN_ID; 2323 2324 return -EINVAL; 2325 } 2326 2327 static const struct fastrpc_soc_data kaanapali_soc_data = { 2328 .sid_pos = 56, 2329 .dma_addr_bits_cdsp = 34, 2330 .dma_addr_bits_default = 32, 2331 }; 2332 2333 static const struct fastrpc_soc_data default_soc_data = { 2334 .sid_pos = 32, 2335 .dma_addr_bits_cdsp = 32, 2336 .dma_addr_bits_default = 32, 2337 }; 2338 2339 static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev) 2340 { 2341 struct device *rdev = &rpdev->dev; 2342 struct fastrpc_channel_ctx *data; 2343 int i, err, domain_id = -1, vmcount; 2344 const char *domain; 2345 bool secure_dsp; 2346 unsigned int vmids[FASTRPC_MAX_VMIDS]; 2347 const struct fastrpc_soc_data *soc_data; 2348 2349 soc_data = device_get_match_data(rdev); 2350 2351 err = of_property_read_string(rdev->of_node, "label", &domain); 2352 if (err) { 2353 dev_info(rdev, "FastRPC Domain not specified in DT\n"); 2354 return err; 2355 } 2356 2357 domain_id = fastrpc_get_domain_id(domain); 2358 2359 if (domain_id < 0) { 2360 dev_info(rdev, "FastRPC Domain %s not supported\n", domain); 2361 return -EINVAL; 2362 } 2363 2364 if (of_reserved_mem_device_init_by_idx(rdev, rdev->of_node, 0)) 2365 dev_info(rdev, "no reserved DMA memory for FASTRPC\n"); 2366 2367 vmcount = of_property_read_variable_u32_array(rdev->of_node, 2368 "qcom,vmids", &vmids[0], 0, FASTRPC_MAX_VMIDS); 2369 if (vmcount < 0) 2370 vmcount = 0; 2371 else if (!qcom_scm_is_available()) 2372 return -EPROBE_DEFER; 2373 2374 data = kzalloc(sizeof(*data), GFP_KERNEL); 2375 if (!data) 2376 return -ENOMEM; 2377 2378 if (vmcount) { 2379 data->vmcount = vmcount; 2380 for (i = 0; i < data->vmcount; i++) { 2381 data->vmperms[i].vmid = vmids[i]; 2382 data->vmperms[i].perm = QCOM_SCM_PERM_RWX; 2383 } 2384 } 2385 2386 if (domain_id == SDSP_DOMAIN_ID) { 2387 struct resource res; 2388 u64 src_perms; 2389 2390 err = of_reserved_mem_region_to_resource(rdev->of_node, 0, &res); 2391 if (!err) { 2392 src_perms = BIT(QCOM_SCM_VMID_HLOS); 2393 2394 qcom_scm_assign_mem(res.start, resource_size(&res), &src_perms, 2395 data->vmperms, data->vmcount); 2396 } 2397 2398 } 2399 2400 secure_dsp = !(of_property_read_bool(rdev->of_node, "qcom,non-secure-domain")); 2401 data->secure = secure_dsp; 2402 data->soc_data = soc_data; 2403 2404 switch (domain_id) { 2405 case ADSP_DOMAIN_ID: 2406 case MDSP_DOMAIN_ID: 2407 case SDSP_DOMAIN_ID: 2408 /* Unsigned PD offloading is only supported on CDSP and GDSP */ 2409 data->unsigned_support = false; 2410 err = fastrpc_device_register(rdev, data, secure_dsp, domain); 2411 if (err) 2412 goto err_free_data; 2413 break; 2414 case CDSP_DOMAIN_ID: 2415 case GDSP_DOMAIN_ID: 2416 data->unsigned_support = true; 2417 /* Create both device nodes so that we can allow both Signed and Unsigned PD */ 2418 err = fastrpc_device_register(rdev, data, true, domain); 2419 if (err) 2420 goto err_free_data; 2421 2422 err = fastrpc_device_register(rdev, data, false, domain); 2423 if (err) 2424 goto err_deregister_fdev; 2425 break; 2426 default: 2427 err = -EINVAL; 2428 goto err_free_data; 2429 } 2430 2431 kref_init(&data->refcount); 2432 2433 dev_set_drvdata(&rpdev->dev, data); 2434 rdev->dma_mask = &data->dma_mask; 2435 dma_set_mask_and_coherent(rdev, DMA_BIT_MASK(32)); 2436 INIT_LIST_HEAD(&data->users); 2437 INIT_LIST_HEAD(&data->invoke_interrupted_mmaps); 2438 spin_lock_init(&data->lock); 2439 idr_init(&data->ctx_idr); 2440 data->domain_id = domain_id; 2441 data->rpdev = rpdev; 2442 2443 err = of_platform_populate(rdev->of_node, NULL, NULL, rdev); 2444 if (err) 2445 goto err_deregister_fdev; 2446 2447 return 0; 2448 2449 err_deregister_fdev: 2450 if (data->fdevice) 2451 misc_deregister(&data->fdevice->miscdev); 2452 if (data->secure_fdevice) 2453 misc_deregister(&data->secure_fdevice->miscdev); 2454 2455 err_free_data: 2456 kfree(data); 2457 return err; 2458 } 2459 2460 static void fastrpc_notify_users(struct fastrpc_user *user) 2461 { 2462 struct fastrpc_invoke_ctx *ctx; 2463 2464 spin_lock(&user->lock); 2465 list_for_each_entry(ctx, &user->pending, node) { 2466 ctx->retval = -EPIPE; 2467 complete(&ctx->work); 2468 } 2469 spin_unlock(&user->lock); 2470 } 2471 2472 static void fastrpc_rpmsg_remove(struct rpmsg_device *rpdev) 2473 { 2474 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); 2475 struct fastrpc_buf *buf, *b; 2476 struct fastrpc_user *user; 2477 unsigned long flags; 2478 2479 /* No invocations past this point */ 2480 spin_lock_irqsave(&cctx->lock, flags); 2481 cctx->rpdev = NULL; 2482 list_for_each_entry(user, &cctx->users, user) 2483 fastrpc_notify_users(user); 2484 spin_unlock_irqrestore(&cctx->lock, flags); 2485 2486 if (cctx->fdevice) 2487 misc_deregister(&cctx->fdevice->miscdev); 2488 2489 if (cctx->secure_fdevice) 2490 misc_deregister(&cctx->secure_fdevice->miscdev); 2491 2492 list_for_each_entry_safe(buf, b, &cctx->invoke_interrupted_mmaps, node) 2493 list_del(&buf->node); 2494 2495 if (cctx->remote_heap) 2496 fastrpc_buf_free(cctx->remote_heap); 2497 2498 of_platform_depopulate(&rpdev->dev); 2499 2500 fastrpc_channel_ctx_put(cctx); 2501 } 2502 2503 static int fastrpc_rpmsg_callback(struct rpmsg_device *rpdev, void *data, 2504 int len, void *priv, u32 addr) 2505 { 2506 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); 2507 struct fastrpc_invoke_rsp *rsp = data; 2508 struct fastrpc_invoke_ctx *ctx; 2509 unsigned long flags; 2510 unsigned long ctxid; 2511 2512 if (len < sizeof(*rsp)) 2513 return -EINVAL; 2514 2515 ctxid = ((rsp->ctx & FASTRPC_CTXID_MASK) >> 4); 2516 2517 spin_lock_irqsave(&cctx->lock, flags); 2518 ctx = idr_find(&cctx->ctx_idr, ctxid); 2519 spin_unlock_irqrestore(&cctx->lock, flags); 2520 2521 if (!ctx) { 2522 dev_err(&rpdev->dev, "No context ID matches response\n"); 2523 return -ENOENT; 2524 } 2525 2526 ctx->retval = rsp->retval; 2527 complete(&ctx->work); 2528 2529 /* 2530 * The DMA buffer associated with the context cannot be freed in 2531 * interrupt context so schedule it through a worker thread to 2532 * avoid a kernel BUG. 2533 */ 2534 schedule_work(&ctx->put_work); 2535 2536 return 0; 2537 } 2538 2539 static const struct of_device_id fastrpc_rpmsg_of_match[] = { 2540 { .compatible = "qcom,kaanapali-fastrpc", .data = &kaanapali_soc_data }, 2541 { .compatible = "qcom,fastrpc", .data = &default_soc_data }, 2542 { }, 2543 }; 2544 MODULE_DEVICE_TABLE(of, fastrpc_rpmsg_of_match); 2545 2546 static struct rpmsg_driver fastrpc_driver = { 2547 .probe = fastrpc_rpmsg_probe, 2548 .remove = fastrpc_rpmsg_remove, 2549 .callback = fastrpc_rpmsg_callback, 2550 .drv = { 2551 .name = "qcom,fastrpc", 2552 .of_match_table = fastrpc_rpmsg_of_match, 2553 }, 2554 }; 2555 2556 static int fastrpc_init(void) 2557 { 2558 int ret; 2559 2560 ret = platform_driver_register(&fastrpc_cb_driver); 2561 if (ret < 0) { 2562 pr_err("fastrpc: failed to register cb driver\n"); 2563 return ret; 2564 } 2565 2566 ret = register_rpmsg_driver(&fastrpc_driver); 2567 if (ret < 0) { 2568 pr_err("fastrpc: failed to register rpmsg driver\n"); 2569 platform_driver_unregister(&fastrpc_cb_driver); 2570 return ret; 2571 } 2572 2573 return 0; 2574 } 2575 module_init(fastrpc_init); 2576 2577 static void fastrpc_exit(void) 2578 { 2579 platform_driver_unregister(&fastrpc_cb_driver); 2580 unregister_rpmsg_driver(&fastrpc_driver); 2581 } 2582 module_exit(fastrpc_exit); 2583 2584 MODULE_DESCRIPTION("Qualcomm FastRPC"); 2585 MODULE_LICENSE("GPL v2"); 2586 MODULE_IMPORT_NS("DMA_BUF"); 2587