1 // SPDX-License-Identifier: GPL-2.0 2 // Copyright (c) 2011-2018, The Linux Foundation. All rights reserved. 3 // Copyright (c) 2018, Linaro Limited 4 5 #include <linux/completion.h> 6 #include <linux/device.h> 7 #include <linux/dma-buf.h> 8 #include <linux/dma-mapping.h> 9 #include <linux/dma-resv.h> 10 #include <linux/idr.h> 11 #include <linux/list.h> 12 #include <linux/miscdevice.h> 13 #include <linux/module.h> 14 #include <linux/of_address.h> 15 #include <linux/of.h> 16 #include <linux/platform_device.h> 17 #include <linux/sort.h> 18 #include <linux/of_platform.h> 19 #include <linux/rpmsg.h> 20 #include <linux/scatterlist.h> 21 #include <linux/slab.h> 22 #include <linux/firmware/qcom/qcom_scm.h> 23 #include <uapi/misc/fastrpc.h> 24 #include <linux/of_reserved_mem.h> 25 26 #define ADSP_DOMAIN_ID (0) 27 #define MDSP_DOMAIN_ID (1) 28 #define SDSP_DOMAIN_ID (2) 29 #define CDSP_DOMAIN_ID (3) 30 #define GDSP_DOMAIN_ID (4) 31 #define FASTRPC_MAX_SESSIONS 14 32 #define FASTRPC_MAX_VMIDS 16 33 #define FASTRPC_ALIGN 128 34 #define FASTRPC_MAX_FDLIST 16 35 #define FASTRPC_MAX_CRCLIST 64 36 #define FASTRPC_PHYS(p) ((p) & 0xffffffff) 37 #define FASTRPC_CTX_MAX (256) 38 #define FASTRPC_INIT_HANDLE 1 39 #define FASTRPC_DSP_UTILITIES_HANDLE 2 40 #define FASTRPC_CTXID_MASK (0xFF0) 41 #define INIT_FILELEN_MAX (2 * 1024 * 1024) 42 #define INIT_FILE_NAMELEN_MAX (128) 43 #define FASTRPC_DEVICE_NAME "fastrpc" 44 45 /* Add memory to static PD pool, protection thru XPU */ 46 #define ADSP_MMAP_HEAP_ADDR 4 47 /* MAP static DMA buffer on DSP User PD */ 48 #define ADSP_MMAP_DMA_BUFFER 6 49 /* Add memory to static PD pool protection thru hypervisor */ 50 #define ADSP_MMAP_REMOTE_HEAP_ADDR 8 51 /* Add memory to userPD pool, for user heap */ 52 #define ADSP_MMAP_ADD_PAGES 0x1000 53 /* Add memory to userPD pool, for LLC heap */ 54 #define ADSP_MMAP_ADD_PAGES_LLC 0x3000, 55 56 #define DSP_UNSUPPORTED_API (0x80000414) 57 /* MAX NUMBER of DSP ATTRIBUTES SUPPORTED */ 58 #define FASTRPC_MAX_DSP_ATTRIBUTES (256) 59 #define FASTRPC_MAX_DSP_ATTRIBUTES_LEN (sizeof(u32) * FASTRPC_MAX_DSP_ATTRIBUTES) 60 61 /* Retrives number of input buffers from the scalars parameter */ 62 #define REMOTE_SCALARS_INBUFS(sc) (((sc) >> 16) & 0x0ff) 63 64 /* Retrives number of output buffers from the scalars parameter */ 65 #define REMOTE_SCALARS_OUTBUFS(sc) (((sc) >> 8) & 0x0ff) 66 67 /* Retrives number of input handles from the scalars parameter */ 68 #define REMOTE_SCALARS_INHANDLES(sc) (((sc) >> 4) & 0x0f) 69 70 /* Retrives number of output handles from the scalars parameter */ 71 #define REMOTE_SCALARS_OUTHANDLES(sc) ((sc) & 0x0f) 72 73 #define REMOTE_SCALARS_LENGTH(sc) (REMOTE_SCALARS_INBUFS(sc) + \ 74 REMOTE_SCALARS_OUTBUFS(sc) + \ 75 REMOTE_SCALARS_INHANDLES(sc)+ \ 76 REMOTE_SCALARS_OUTHANDLES(sc)) 77 #define FASTRPC_BUILD_SCALARS(attr, method, in, out, oin, oout) \ 78 (((attr & 0x07) << 29) | \ 79 ((method & 0x1f) << 24) | \ 80 ((in & 0xff) << 16) | \ 81 ((out & 0xff) << 8) | \ 82 ((oin & 0x0f) << 4) | \ 83 (oout & 0x0f)) 84 85 #define FASTRPC_SCALARS(method, in, out) \ 86 FASTRPC_BUILD_SCALARS(0, method, in, out, 0, 0) 87 88 #define FASTRPC_CREATE_PROCESS_NARGS 6 89 #define FASTRPC_CREATE_STATIC_PROCESS_NARGS 3 90 /* Remote Method id table */ 91 #define FASTRPC_RMID_INIT_ATTACH 0 92 #define FASTRPC_RMID_INIT_RELEASE 1 93 #define FASTRPC_RMID_INIT_MMAP 4 94 #define FASTRPC_RMID_INIT_MUNMAP 5 95 #define FASTRPC_RMID_INIT_CREATE 6 96 #define FASTRPC_RMID_INIT_CREATE_ATTR 7 97 #define FASTRPC_RMID_INIT_CREATE_STATIC 8 98 #define FASTRPC_RMID_INIT_MEM_MAP 10 99 #define FASTRPC_RMID_INIT_MEM_UNMAP 11 100 101 /* Protection Domain(PD) ids */ 102 #define ROOT_PD (0) 103 #define USER_PD (1) 104 #define SENSORS_PD (2) 105 106 #define miscdev_to_fdevice(d) container_of(d, struct fastrpc_device, miscdev) 107 108 struct fastrpc_phy_page { 109 u64 addr; /* physical 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 u64 addr; /* physical 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 u64 phys; 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 u64 phys; 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_channel_ctx { 261 int domain_id; 262 int sesscount; 263 int vmcount; 264 struct qcom_scm_vmperm vmperms[FASTRPC_MAX_VMIDS]; 265 struct rpmsg_device *rpdev; 266 struct fastrpc_session_ctx session[FASTRPC_MAX_SESSIONS]; 267 spinlock_t lock; 268 struct idr ctx_idr; 269 struct list_head users; 270 struct kref refcount; 271 /* Flag if dsp attributes are cached */ 272 bool valid_attributes; 273 u32 dsp_attributes[FASTRPC_MAX_DSP_ATTRIBUTES]; 274 struct fastrpc_device *secure_fdevice; 275 struct fastrpc_device *fdevice; 276 struct fastrpc_buf *remote_heap; 277 struct list_head invoke_interrupted_mmaps; 278 bool secure; 279 bool unsigned_support; 280 u64 dma_mask; 281 }; 282 283 struct fastrpc_device { 284 struct fastrpc_channel_ctx *cctx; 285 struct miscdevice miscdev; 286 bool secure; 287 }; 288 289 struct fastrpc_user { 290 struct list_head user; 291 struct list_head maps; 292 struct list_head pending; 293 struct list_head mmaps; 294 295 struct fastrpc_channel_ctx *cctx; 296 struct fastrpc_session_ctx *sctx; 297 struct fastrpc_buf *init_mem; 298 299 int client_id; 300 int pd; 301 bool is_secure_dev; 302 /* Lock for lists */ 303 spinlock_t lock; 304 /* lock for allocations */ 305 struct mutex mutex; 306 }; 307 308 static void fastrpc_free_map(struct kref *ref) 309 { 310 struct fastrpc_map *map; 311 312 map = container_of(ref, struct fastrpc_map, refcount); 313 314 if (map->table) { 315 if (map->attr & FASTRPC_ATTR_SECUREMAP) { 316 struct qcom_scm_vmperm perm; 317 int vmid = map->fl->cctx->vmperms[0].vmid; 318 u64 src_perms = BIT(QCOM_SCM_VMID_HLOS) | BIT(vmid); 319 int err = 0; 320 321 perm.vmid = QCOM_SCM_VMID_HLOS; 322 perm.perm = QCOM_SCM_PERM_RWX; 323 err = qcom_scm_assign_mem(map->phys, map->len, 324 &src_perms, &perm, 1); 325 if (err) { 326 dev_err(map->fl->sctx->dev, "Failed to assign memory phys 0x%llx size 0x%llx err %d\n", 327 map->phys, map->len, err); 328 return; 329 } 330 } 331 dma_buf_unmap_attachment_unlocked(map->attach, map->table, 332 DMA_BIDIRECTIONAL); 333 dma_buf_detach(map->buf, map->attach); 334 dma_buf_put(map->buf); 335 } 336 337 if (map->fl) { 338 spin_lock(&map->fl->lock); 339 list_del(&map->node); 340 spin_unlock(&map->fl->lock); 341 map->fl = NULL; 342 } 343 344 kfree(map); 345 } 346 347 static void fastrpc_map_put(struct fastrpc_map *map) 348 { 349 if (map) 350 kref_put(&map->refcount, fastrpc_free_map); 351 } 352 353 static int fastrpc_map_get(struct fastrpc_map *map) 354 { 355 if (!map) 356 return -ENOENT; 357 358 return kref_get_unless_zero(&map->refcount) ? 0 : -ENOENT; 359 } 360 361 362 static int fastrpc_map_lookup(struct fastrpc_user *fl, int fd, 363 struct fastrpc_map **ppmap) 364 { 365 struct fastrpc_map *map = NULL; 366 struct dma_buf *buf; 367 int ret = -ENOENT; 368 369 buf = dma_buf_get(fd); 370 if (IS_ERR(buf)) 371 return PTR_ERR(buf); 372 373 spin_lock(&fl->lock); 374 list_for_each_entry(map, &fl->maps, node) { 375 if (map->fd != fd || map->buf != buf) 376 continue; 377 378 *ppmap = map; 379 ret = 0; 380 break; 381 } 382 spin_unlock(&fl->lock); 383 384 return ret; 385 } 386 387 static void fastrpc_buf_free(struct fastrpc_buf *buf) 388 { 389 dma_free_coherent(buf->dev, buf->size, buf->virt, 390 FASTRPC_PHYS(buf->phys)); 391 kfree(buf); 392 } 393 394 static int __fastrpc_buf_alloc(struct fastrpc_user *fl, struct device *dev, 395 u64 size, struct fastrpc_buf **obuf) 396 { 397 struct fastrpc_buf *buf; 398 399 buf = kzalloc(sizeof(*buf), GFP_KERNEL); 400 if (!buf) 401 return -ENOMEM; 402 403 INIT_LIST_HEAD(&buf->attachments); 404 INIT_LIST_HEAD(&buf->node); 405 mutex_init(&buf->lock); 406 407 buf->fl = fl; 408 buf->virt = NULL; 409 buf->phys = 0; 410 buf->size = size; 411 buf->dev = dev; 412 buf->raddr = 0; 413 414 buf->virt = dma_alloc_coherent(dev, buf->size, (dma_addr_t *)&buf->phys, 415 GFP_KERNEL); 416 if (!buf->virt) { 417 mutex_destroy(&buf->lock); 418 kfree(buf); 419 return -ENOMEM; 420 } 421 422 *obuf = buf; 423 424 return 0; 425 } 426 427 static int fastrpc_buf_alloc(struct fastrpc_user *fl, struct device *dev, 428 u64 size, struct fastrpc_buf **obuf) 429 { 430 int ret; 431 struct fastrpc_buf *buf; 432 433 ret = __fastrpc_buf_alloc(fl, dev, size, obuf); 434 if (ret) 435 return ret; 436 437 buf = *obuf; 438 439 if (fl->sctx && fl->sctx->sid) 440 buf->phys += ((u64)fl->sctx->sid << 32); 441 442 return 0; 443 } 444 445 static int fastrpc_remote_heap_alloc(struct fastrpc_user *fl, struct device *dev, 446 u64 size, struct fastrpc_buf **obuf) 447 { 448 struct device *rdev = &fl->cctx->rpdev->dev; 449 450 return __fastrpc_buf_alloc(fl, rdev, size, obuf); 451 } 452 453 static void fastrpc_channel_ctx_free(struct kref *ref) 454 { 455 struct fastrpc_channel_ctx *cctx; 456 457 cctx = container_of(ref, struct fastrpc_channel_ctx, refcount); 458 459 kfree(cctx); 460 } 461 462 static void fastrpc_channel_ctx_get(struct fastrpc_channel_ctx *cctx) 463 { 464 kref_get(&cctx->refcount); 465 } 466 467 static void fastrpc_channel_ctx_put(struct fastrpc_channel_ctx *cctx) 468 { 469 kref_put(&cctx->refcount, fastrpc_channel_ctx_free); 470 } 471 472 static void fastrpc_context_free(struct kref *ref) 473 { 474 struct fastrpc_invoke_ctx *ctx; 475 struct fastrpc_channel_ctx *cctx; 476 unsigned long flags; 477 int i; 478 479 ctx = container_of(ref, struct fastrpc_invoke_ctx, refcount); 480 cctx = ctx->cctx; 481 482 for (i = 0; i < ctx->nbufs; i++) 483 fastrpc_map_put(ctx->maps[i]); 484 485 if (ctx->buf) 486 fastrpc_buf_free(ctx->buf); 487 488 spin_lock_irqsave(&cctx->lock, flags); 489 idr_remove(&cctx->ctx_idr, ctx->ctxid >> 4); 490 spin_unlock_irqrestore(&cctx->lock, flags); 491 492 kfree(ctx->maps); 493 kfree(ctx->olaps); 494 kfree(ctx); 495 496 fastrpc_channel_ctx_put(cctx); 497 } 498 499 static void fastrpc_context_get(struct fastrpc_invoke_ctx *ctx) 500 { 501 kref_get(&ctx->refcount); 502 } 503 504 static void fastrpc_context_put(struct fastrpc_invoke_ctx *ctx) 505 { 506 kref_put(&ctx->refcount, fastrpc_context_free); 507 } 508 509 static void fastrpc_context_put_wq(struct work_struct *work) 510 { 511 struct fastrpc_invoke_ctx *ctx = 512 container_of(work, struct fastrpc_invoke_ctx, put_work); 513 514 fastrpc_context_put(ctx); 515 } 516 517 #define CMP(aa, bb) ((aa) == (bb) ? 0 : (aa) < (bb) ? -1 : 1) 518 static int olaps_cmp(const void *a, const void *b) 519 { 520 struct fastrpc_buf_overlap *pa = (struct fastrpc_buf_overlap *)a; 521 struct fastrpc_buf_overlap *pb = (struct fastrpc_buf_overlap *)b; 522 /* sort with lowest starting buffer first */ 523 int st = CMP(pa->start, pb->start); 524 /* sort with highest ending buffer first */ 525 int ed = CMP(pb->end, pa->end); 526 527 return st == 0 ? ed : st; 528 } 529 530 static void fastrpc_get_buff_overlaps(struct fastrpc_invoke_ctx *ctx) 531 { 532 u64 max_end = 0; 533 int i; 534 535 for (i = 0; i < ctx->nbufs; ++i) { 536 ctx->olaps[i].start = ctx->args[i].ptr; 537 ctx->olaps[i].end = ctx->olaps[i].start + ctx->args[i].length; 538 ctx->olaps[i].raix = i; 539 } 540 541 sort(ctx->olaps, ctx->nbufs, sizeof(*ctx->olaps), olaps_cmp, NULL); 542 543 for (i = 0; i < ctx->nbufs; ++i) { 544 /* Falling inside previous range */ 545 if (ctx->olaps[i].start < max_end) { 546 ctx->olaps[i].mstart = max_end; 547 ctx->olaps[i].mend = ctx->olaps[i].end; 548 ctx->olaps[i].offset = max_end - ctx->olaps[i].start; 549 550 if (ctx->olaps[i].end > max_end) { 551 max_end = ctx->olaps[i].end; 552 } else { 553 ctx->olaps[i].mend = 0; 554 ctx->olaps[i].mstart = 0; 555 } 556 557 } else { 558 ctx->olaps[i].mend = ctx->olaps[i].end; 559 ctx->olaps[i].mstart = ctx->olaps[i].start; 560 ctx->olaps[i].offset = 0; 561 max_end = ctx->olaps[i].end; 562 } 563 } 564 } 565 566 static struct fastrpc_invoke_ctx *fastrpc_context_alloc( 567 struct fastrpc_user *user, u32 kernel, u32 sc, 568 struct fastrpc_invoke_args *args) 569 { 570 struct fastrpc_channel_ctx *cctx = user->cctx; 571 struct fastrpc_invoke_ctx *ctx = NULL; 572 unsigned long flags; 573 int ret; 574 575 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 576 if (!ctx) 577 return ERR_PTR(-ENOMEM); 578 579 INIT_LIST_HEAD(&ctx->node); 580 ctx->fl = user; 581 ctx->nscalars = REMOTE_SCALARS_LENGTH(sc); 582 ctx->nbufs = REMOTE_SCALARS_INBUFS(sc) + 583 REMOTE_SCALARS_OUTBUFS(sc); 584 585 if (ctx->nscalars) { 586 ctx->maps = kcalloc(ctx->nscalars, 587 sizeof(*ctx->maps), GFP_KERNEL); 588 if (!ctx->maps) { 589 kfree(ctx); 590 return ERR_PTR(-ENOMEM); 591 } 592 ctx->olaps = kcalloc(ctx->nscalars, 593 sizeof(*ctx->olaps), GFP_KERNEL); 594 if (!ctx->olaps) { 595 kfree(ctx->maps); 596 kfree(ctx); 597 return ERR_PTR(-ENOMEM); 598 } 599 ctx->args = args; 600 fastrpc_get_buff_overlaps(ctx); 601 } 602 603 /* Released in fastrpc_context_put() */ 604 fastrpc_channel_ctx_get(cctx); 605 606 ctx->sc = sc; 607 ctx->retval = -1; 608 ctx->pid = current->pid; 609 ctx->client_id = user->client_id; 610 ctx->cctx = cctx; 611 init_completion(&ctx->work); 612 INIT_WORK(&ctx->put_work, fastrpc_context_put_wq); 613 614 spin_lock(&user->lock); 615 list_add_tail(&ctx->node, &user->pending); 616 spin_unlock(&user->lock); 617 618 spin_lock_irqsave(&cctx->lock, flags); 619 ret = idr_alloc_cyclic(&cctx->ctx_idr, ctx, 1, 620 FASTRPC_CTX_MAX, GFP_ATOMIC); 621 if (ret < 0) { 622 spin_unlock_irqrestore(&cctx->lock, flags); 623 goto err_idr; 624 } 625 ctx->ctxid = ret << 4; 626 spin_unlock_irqrestore(&cctx->lock, flags); 627 628 kref_init(&ctx->refcount); 629 630 return ctx; 631 err_idr: 632 spin_lock(&user->lock); 633 list_del(&ctx->node); 634 spin_unlock(&user->lock); 635 fastrpc_channel_ctx_put(cctx); 636 kfree(ctx->maps); 637 kfree(ctx->olaps); 638 kfree(ctx); 639 640 return ERR_PTR(ret); 641 } 642 643 static struct sg_table * 644 fastrpc_map_dma_buf(struct dma_buf_attachment *attachment, 645 enum dma_data_direction dir) 646 { 647 struct fastrpc_dma_buf_attachment *a = attachment->priv; 648 struct sg_table *table; 649 int ret; 650 651 table = &a->sgt; 652 653 ret = dma_map_sgtable(attachment->dev, table, dir, 0); 654 if (ret) 655 table = ERR_PTR(ret); 656 return table; 657 } 658 659 static void fastrpc_unmap_dma_buf(struct dma_buf_attachment *attach, 660 struct sg_table *table, 661 enum dma_data_direction dir) 662 { 663 dma_unmap_sgtable(attach->dev, table, dir, 0); 664 } 665 666 static void fastrpc_release(struct dma_buf *dmabuf) 667 { 668 struct fastrpc_buf *buffer = dmabuf->priv; 669 670 fastrpc_buf_free(buffer); 671 } 672 673 static int fastrpc_dma_buf_attach(struct dma_buf *dmabuf, 674 struct dma_buf_attachment *attachment) 675 { 676 struct fastrpc_dma_buf_attachment *a; 677 struct fastrpc_buf *buffer = dmabuf->priv; 678 int ret; 679 680 a = kzalloc(sizeof(*a), GFP_KERNEL); 681 if (!a) 682 return -ENOMEM; 683 684 ret = dma_get_sgtable(buffer->dev, &a->sgt, buffer->virt, 685 FASTRPC_PHYS(buffer->phys), buffer->size); 686 if (ret < 0) { 687 dev_err(buffer->dev, "failed to get scatterlist from DMA API\n"); 688 kfree(a); 689 return -EINVAL; 690 } 691 692 a->dev = attachment->dev; 693 INIT_LIST_HEAD(&a->node); 694 attachment->priv = a; 695 696 mutex_lock(&buffer->lock); 697 list_add(&a->node, &buffer->attachments); 698 mutex_unlock(&buffer->lock); 699 700 return 0; 701 } 702 703 static void fastrpc_dma_buf_detatch(struct dma_buf *dmabuf, 704 struct dma_buf_attachment *attachment) 705 { 706 struct fastrpc_dma_buf_attachment *a = attachment->priv; 707 struct fastrpc_buf *buffer = dmabuf->priv; 708 709 mutex_lock(&buffer->lock); 710 list_del(&a->node); 711 mutex_unlock(&buffer->lock); 712 sg_free_table(&a->sgt); 713 kfree(a); 714 } 715 716 static int fastrpc_vmap(struct dma_buf *dmabuf, struct iosys_map *map) 717 { 718 struct fastrpc_buf *buf = dmabuf->priv; 719 720 iosys_map_set_vaddr(map, buf->virt); 721 722 return 0; 723 } 724 725 static int fastrpc_mmap(struct dma_buf *dmabuf, 726 struct vm_area_struct *vma) 727 { 728 struct fastrpc_buf *buf = dmabuf->priv; 729 size_t size = vma->vm_end - vma->vm_start; 730 731 dma_resv_assert_held(dmabuf->resv); 732 733 return dma_mmap_coherent(buf->dev, vma, buf->virt, 734 FASTRPC_PHYS(buf->phys), size); 735 } 736 737 static const struct dma_buf_ops fastrpc_dma_buf_ops = { 738 .attach = fastrpc_dma_buf_attach, 739 .detach = fastrpc_dma_buf_detatch, 740 .map_dma_buf = fastrpc_map_dma_buf, 741 .unmap_dma_buf = fastrpc_unmap_dma_buf, 742 .mmap = fastrpc_mmap, 743 .vmap = fastrpc_vmap, 744 .release = fastrpc_release, 745 }; 746 747 static int fastrpc_map_attach(struct fastrpc_user *fl, int fd, 748 u64 len, u32 attr, struct fastrpc_map **ppmap) 749 { 750 struct fastrpc_session_ctx *sess = fl->sctx; 751 struct fastrpc_map *map = NULL; 752 struct sg_table *table; 753 struct scatterlist *sgl = NULL; 754 int err = 0, sgl_index = 0; 755 756 map = kzalloc(sizeof(*map), GFP_KERNEL); 757 if (!map) 758 return -ENOMEM; 759 760 INIT_LIST_HEAD(&map->node); 761 kref_init(&map->refcount); 762 763 map->fl = fl; 764 map->fd = fd; 765 map->buf = dma_buf_get(fd); 766 if (IS_ERR(map->buf)) { 767 err = PTR_ERR(map->buf); 768 goto get_err; 769 } 770 771 map->attach = dma_buf_attach(map->buf, sess->dev); 772 if (IS_ERR(map->attach)) { 773 dev_err(sess->dev, "Failed to attach dmabuf\n"); 774 err = PTR_ERR(map->attach); 775 goto attach_err; 776 } 777 778 table = dma_buf_map_attachment_unlocked(map->attach, DMA_BIDIRECTIONAL); 779 if (IS_ERR(table)) { 780 err = PTR_ERR(table); 781 goto map_err; 782 } 783 map->table = table; 784 785 if (attr & FASTRPC_ATTR_SECUREMAP) { 786 map->phys = sg_phys(map->table->sgl); 787 } else { 788 map->phys = sg_dma_address(map->table->sgl); 789 map->phys += ((u64)fl->sctx->sid << 32); 790 } 791 for_each_sg(map->table->sgl, sgl, map->table->nents, 792 sgl_index) 793 map->size += sg_dma_len(sgl); 794 if (len > map->size) { 795 dev_dbg(sess->dev, "Bad size passed len 0x%llx map size 0x%llx\n", 796 len, map->size); 797 err = -EINVAL; 798 goto map_err; 799 } 800 map->va = sg_virt(map->table->sgl); 801 map->len = len; 802 803 if (attr & FASTRPC_ATTR_SECUREMAP) { 804 /* 805 * If subsystem VMIDs are defined in DTSI, then do 806 * hyp_assign from HLOS to those VM(s) 807 */ 808 u64 src_perms = BIT(QCOM_SCM_VMID_HLOS); 809 struct qcom_scm_vmperm dst_perms[2] = {0}; 810 811 dst_perms[0].vmid = QCOM_SCM_VMID_HLOS; 812 dst_perms[0].perm = QCOM_SCM_PERM_RW; 813 dst_perms[1].vmid = fl->cctx->vmperms[0].vmid; 814 dst_perms[1].perm = QCOM_SCM_PERM_RWX; 815 map->attr = attr; 816 err = qcom_scm_assign_mem(map->phys, (u64)map->len, &src_perms, dst_perms, 2); 817 if (err) { 818 dev_err(sess->dev, "Failed to assign memory with phys 0x%llx size 0x%llx err %d\n", 819 map->phys, map->len, err); 820 goto map_err; 821 } 822 } 823 spin_lock(&fl->lock); 824 list_add_tail(&map->node, &fl->maps); 825 spin_unlock(&fl->lock); 826 *ppmap = map; 827 828 return 0; 829 830 map_err: 831 dma_buf_detach(map->buf, map->attach); 832 attach_err: 833 dma_buf_put(map->buf); 834 get_err: 835 fastrpc_map_put(map); 836 837 return err; 838 } 839 840 static int fastrpc_map_create(struct fastrpc_user *fl, int fd, 841 u64 len, u32 attr, struct fastrpc_map **ppmap) 842 { 843 struct fastrpc_session_ctx *sess = fl->sctx; 844 int err = 0; 845 846 if (!fastrpc_map_lookup(fl, fd, ppmap)) { 847 if (!fastrpc_map_get(*ppmap)) 848 return 0; 849 dev_dbg(sess->dev, "%s: Failed to get map fd=%d\n", 850 __func__, fd); 851 } 852 853 err = fastrpc_map_attach(fl, fd, len, attr, ppmap); 854 855 return err; 856 } 857 858 /* 859 * Fastrpc payload buffer with metadata looks like: 860 * 861 * >>>>>> START of METADATA <<<<<<<<< 862 * +---------------------------------+ 863 * | Arguments | 864 * | type:(union fastrpc_remote_arg)| 865 * | (0 - N) | 866 * +---------------------------------+ 867 * | Invoke Buffer list | 868 * | type:(struct fastrpc_invoke_buf)| 869 * | (0 - N) | 870 * +---------------------------------+ 871 * | Page info list | 872 * | type:(struct fastrpc_phy_page) | 873 * | (0 - N) | 874 * +---------------------------------+ 875 * | Optional info | 876 * |(can be specific to SoC/Firmware)| 877 * +---------------------------------+ 878 * >>>>>>>> END of METADATA <<<<<<<<< 879 * +---------------------------------+ 880 * | Inline ARGS | 881 * | (0-N) | 882 * +---------------------------------+ 883 */ 884 885 static int fastrpc_get_meta_size(struct fastrpc_invoke_ctx *ctx) 886 { 887 int size = 0; 888 889 size = (sizeof(struct fastrpc_remote_buf) + 890 sizeof(struct fastrpc_invoke_buf) + 891 sizeof(struct fastrpc_phy_page)) * ctx->nscalars + 892 sizeof(u64) * FASTRPC_MAX_FDLIST + 893 sizeof(u32) * FASTRPC_MAX_CRCLIST; 894 895 return size; 896 } 897 898 static u64 fastrpc_get_payload_size(struct fastrpc_invoke_ctx *ctx, int metalen) 899 { 900 u64 size = 0; 901 int oix; 902 903 size = ALIGN(metalen, FASTRPC_ALIGN); 904 for (oix = 0; oix < ctx->nbufs; oix++) { 905 int i = ctx->olaps[oix].raix; 906 907 if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1) { 908 909 if (ctx->olaps[oix].offset == 0) 910 size = ALIGN(size, FASTRPC_ALIGN); 911 912 size += (ctx->olaps[oix].mend - ctx->olaps[oix].mstart); 913 } 914 } 915 916 return size; 917 } 918 919 static int fastrpc_create_maps(struct fastrpc_invoke_ctx *ctx) 920 { 921 struct device *dev = ctx->fl->sctx->dev; 922 int i, err; 923 924 for (i = 0; i < ctx->nscalars; ++i) { 925 926 if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1 || 927 ctx->args[i].length == 0) 928 continue; 929 930 if (i < ctx->nbufs) 931 err = fastrpc_map_create(ctx->fl, ctx->args[i].fd, 932 ctx->args[i].length, ctx->args[i].attr, &ctx->maps[i]); 933 else 934 err = fastrpc_map_attach(ctx->fl, ctx->args[i].fd, 935 ctx->args[i].length, ctx->args[i].attr, &ctx->maps[i]); 936 if (err) { 937 dev_err(dev, "Error Creating map %d\n", err); 938 return -EINVAL; 939 } 940 941 } 942 return 0; 943 } 944 945 static struct fastrpc_invoke_buf *fastrpc_invoke_buf_start(union fastrpc_remote_arg *pra, int len) 946 { 947 return (struct fastrpc_invoke_buf *)(&pra[len]); 948 } 949 950 static struct fastrpc_phy_page *fastrpc_phy_page_start(struct fastrpc_invoke_buf *buf, int len) 951 { 952 return (struct fastrpc_phy_page *)(&buf[len]); 953 } 954 955 static int fastrpc_get_args(u32 kernel, struct fastrpc_invoke_ctx *ctx) 956 { 957 struct device *dev = ctx->fl->sctx->dev; 958 union fastrpc_remote_arg *rpra; 959 struct fastrpc_invoke_buf *list; 960 struct fastrpc_phy_page *pages; 961 int inbufs, i, oix, err = 0; 962 u64 len, rlen, pkt_size; 963 u64 pg_start, pg_end; 964 uintptr_t args; 965 int metalen; 966 967 inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); 968 metalen = fastrpc_get_meta_size(ctx); 969 pkt_size = fastrpc_get_payload_size(ctx, metalen); 970 971 err = fastrpc_create_maps(ctx); 972 if (err) 973 return err; 974 975 ctx->msg_sz = pkt_size; 976 977 if (ctx->fl->sctx->sid) 978 err = fastrpc_buf_alloc(ctx->fl, dev, pkt_size, &ctx->buf); 979 else 980 err = fastrpc_remote_heap_alloc(ctx->fl, dev, pkt_size, &ctx->buf); 981 if (err) 982 return err; 983 984 memset(ctx->buf->virt, 0, pkt_size); 985 rpra = ctx->buf->virt; 986 list = fastrpc_invoke_buf_start(rpra, ctx->nscalars); 987 pages = fastrpc_phy_page_start(list, ctx->nscalars); 988 args = (uintptr_t)ctx->buf->virt + metalen; 989 rlen = pkt_size - metalen; 990 ctx->rpra = rpra; 991 992 for (oix = 0; oix < ctx->nbufs; ++oix) { 993 int mlen; 994 995 i = ctx->olaps[oix].raix; 996 len = ctx->args[i].length; 997 998 rpra[i].buf.pv = 0; 999 rpra[i].buf.len = len; 1000 list[i].num = len ? 1 : 0; 1001 list[i].pgidx = i; 1002 1003 if (!len) 1004 continue; 1005 1006 if (ctx->maps[i]) { 1007 struct vm_area_struct *vma = NULL; 1008 1009 rpra[i].buf.pv = (u64) ctx->args[i].ptr; 1010 pages[i].addr = ctx->maps[i]->phys; 1011 1012 mmap_read_lock(current->mm); 1013 vma = find_vma(current->mm, ctx->args[i].ptr); 1014 if (vma) 1015 pages[i].addr += (ctx->args[i].ptr & PAGE_MASK) - 1016 vma->vm_start; 1017 mmap_read_unlock(current->mm); 1018 1019 pg_start = (ctx->args[i].ptr & PAGE_MASK) >> PAGE_SHIFT; 1020 pg_end = ((ctx->args[i].ptr + len - 1) & PAGE_MASK) >> 1021 PAGE_SHIFT; 1022 pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; 1023 1024 } else { 1025 1026 if (ctx->olaps[oix].offset == 0) { 1027 rlen -= ALIGN(args, FASTRPC_ALIGN) - args; 1028 args = ALIGN(args, FASTRPC_ALIGN); 1029 } 1030 1031 mlen = ctx->olaps[oix].mend - ctx->olaps[oix].mstart; 1032 1033 if (rlen < mlen) 1034 goto bail; 1035 1036 rpra[i].buf.pv = args - ctx->olaps[oix].offset; 1037 pages[i].addr = ctx->buf->phys - 1038 ctx->olaps[oix].offset + 1039 (pkt_size - rlen); 1040 pages[i].addr = pages[i].addr & PAGE_MASK; 1041 1042 pg_start = (rpra[i].buf.pv & PAGE_MASK) >> PAGE_SHIFT; 1043 pg_end = ((rpra[i].buf.pv + len - 1) & PAGE_MASK) >> PAGE_SHIFT; 1044 pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; 1045 args = args + mlen; 1046 rlen -= mlen; 1047 } 1048 1049 if (i < inbufs && !ctx->maps[i]) { 1050 void *dst = (void *)(uintptr_t)rpra[i].buf.pv; 1051 void *src = (void *)(uintptr_t)ctx->args[i].ptr; 1052 1053 if (!kernel) { 1054 if (copy_from_user(dst, (void __user *)src, 1055 len)) { 1056 err = -EFAULT; 1057 goto bail; 1058 } 1059 } else { 1060 memcpy(dst, src, len); 1061 } 1062 } 1063 } 1064 1065 for (i = ctx->nbufs; i < ctx->nscalars; ++i) { 1066 list[i].num = ctx->args[i].length ? 1 : 0; 1067 list[i].pgidx = i; 1068 if (ctx->maps[i]) { 1069 pages[i].addr = ctx->maps[i]->phys; 1070 pages[i].size = ctx->maps[i]->size; 1071 } 1072 rpra[i].dma.fd = ctx->args[i].fd; 1073 rpra[i].dma.len = ctx->args[i].length; 1074 rpra[i].dma.offset = (u64) ctx->args[i].ptr; 1075 } 1076 1077 bail: 1078 if (err) 1079 dev_err(dev, "Error: get invoke args failed:%d\n", err); 1080 1081 return err; 1082 } 1083 1084 static int fastrpc_put_args(struct fastrpc_invoke_ctx *ctx, 1085 u32 kernel) 1086 { 1087 union fastrpc_remote_arg *rpra = ctx->rpra; 1088 struct fastrpc_user *fl = ctx->fl; 1089 struct fastrpc_map *mmap = NULL; 1090 struct fastrpc_invoke_buf *list; 1091 struct fastrpc_phy_page *pages; 1092 u64 *fdlist; 1093 int i, inbufs, outbufs, handles; 1094 int ret = 0; 1095 1096 inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); 1097 outbufs = REMOTE_SCALARS_OUTBUFS(ctx->sc); 1098 handles = REMOTE_SCALARS_INHANDLES(ctx->sc) + REMOTE_SCALARS_OUTHANDLES(ctx->sc); 1099 list = fastrpc_invoke_buf_start(rpra, ctx->nscalars); 1100 pages = fastrpc_phy_page_start(list, ctx->nscalars); 1101 fdlist = (uint64_t *)(pages + inbufs + outbufs + handles); 1102 1103 for (i = inbufs; i < ctx->nbufs; ++i) { 1104 if (!ctx->maps[i]) { 1105 void *src = (void *)(uintptr_t)rpra[i].buf.pv; 1106 void *dst = (void *)(uintptr_t)ctx->args[i].ptr; 1107 u64 len = rpra[i].buf.len; 1108 1109 if (!kernel) { 1110 if (copy_to_user((void __user *)dst, src, len)) { 1111 ret = -EFAULT; 1112 goto cleanup_fdlist; 1113 } 1114 } else { 1115 memcpy(dst, src, len); 1116 } 1117 } 1118 } 1119 1120 cleanup_fdlist: 1121 /* Clean up fdlist which is updated by DSP */ 1122 for (i = 0; i < FASTRPC_MAX_FDLIST; i++) { 1123 if (!fdlist[i]) 1124 break; 1125 if (!fastrpc_map_lookup(fl, (int)fdlist[i], &mmap)) 1126 fastrpc_map_put(mmap); 1127 } 1128 1129 return ret; 1130 } 1131 1132 static int fastrpc_invoke_send(struct fastrpc_session_ctx *sctx, 1133 struct fastrpc_invoke_ctx *ctx, 1134 u32 kernel, uint32_t handle) 1135 { 1136 struct fastrpc_channel_ctx *cctx; 1137 struct fastrpc_user *fl = ctx->fl; 1138 struct fastrpc_msg *msg = &ctx->msg; 1139 int ret; 1140 1141 cctx = fl->cctx; 1142 msg->client_id = fl->client_id; 1143 msg->tid = current->pid; 1144 1145 if (kernel) 1146 msg->client_id = 0; 1147 1148 msg->ctx = ctx->ctxid | fl->pd; 1149 msg->handle = handle; 1150 msg->sc = ctx->sc; 1151 msg->addr = ctx->buf ? ctx->buf->phys : 0; 1152 msg->size = roundup(ctx->msg_sz, PAGE_SIZE); 1153 fastrpc_context_get(ctx); 1154 1155 ret = rpmsg_send(cctx->rpdev->ept, (void *)msg, sizeof(*msg)); 1156 1157 if (ret) 1158 fastrpc_context_put(ctx); 1159 1160 return ret; 1161 1162 } 1163 1164 static int fastrpc_internal_invoke(struct fastrpc_user *fl, u32 kernel, 1165 u32 handle, u32 sc, 1166 struct fastrpc_invoke_args *args) 1167 { 1168 struct fastrpc_invoke_ctx *ctx = NULL; 1169 struct fastrpc_buf *buf, *b; 1170 1171 int err = 0; 1172 1173 if (!fl->sctx) 1174 return -EINVAL; 1175 1176 if (!fl->cctx->rpdev) 1177 return -EPIPE; 1178 1179 if (handle == FASTRPC_INIT_HANDLE && !kernel) { 1180 dev_warn_ratelimited(fl->sctx->dev, "user app trying to send a kernel RPC message (%d)\n", handle); 1181 return -EPERM; 1182 } 1183 1184 ctx = fastrpc_context_alloc(fl, kernel, sc, args); 1185 if (IS_ERR(ctx)) 1186 return PTR_ERR(ctx); 1187 1188 err = fastrpc_get_args(kernel, ctx); 1189 if (err) 1190 goto bail; 1191 1192 /* make sure that all CPU memory writes are seen by DSP */ 1193 dma_wmb(); 1194 /* Send invoke buffer to remote dsp */ 1195 err = fastrpc_invoke_send(fl->sctx, ctx, kernel, handle); 1196 if (err) 1197 goto bail; 1198 1199 if (kernel) { 1200 if (!wait_for_completion_timeout(&ctx->work, 10 * HZ)) 1201 err = -ETIMEDOUT; 1202 } else { 1203 err = wait_for_completion_interruptible(&ctx->work); 1204 } 1205 1206 if (err) 1207 goto bail; 1208 1209 /* make sure that all memory writes by DSP are seen by CPU */ 1210 dma_rmb(); 1211 /* populate all the output buffers with results */ 1212 err = fastrpc_put_args(ctx, kernel); 1213 if (err) 1214 goto bail; 1215 1216 /* Check the response from remote dsp */ 1217 err = ctx->retval; 1218 if (err) 1219 goto bail; 1220 1221 bail: 1222 if (err != -ERESTARTSYS && err != -ETIMEDOUT) { 1223 /* We are done with this compute context */ 1224 spin_lock(&fl->lock); 1225 list_del(&ctx->node); 1226 spin_unlock(&fl->lock); 1227 fastrpc_context_put(ctx); 1228 } 1229 1230 if (err == -ERESTARTSYS) { 1231 list_for_each_entry_safe(buf, b, &fl->mmaps, node) { 1232 list_del(&buf->node); 1233 list_add_tail(&buf->node, &fl->cctx->invoke_interrupted_mmaps); 1234 } 1235 } 1236 1237 if (err) 1238 dev_dbg(fl->sctx->dev, "Error: Invoke Failed %d\n", err); 1239 1240 return err; 1241 } 1242 1243 static bool is_session_rejected(struct fastrpc_user *fl, bool unsigned_pd_request) 1244 { 1245 /* Check if the device node is non-secure and channel is secure*/ 1246 if (!fl->is_secure_dev && fl->cctx->secure) { 1247 /* 1248 * Allow untrusted applications to offload only to Unsigned PD when 1249 * channel is configured as secure and block untrusted apps on channel 1250 * that does not support unsigned PD offload 1251 */ 1252 if (!fl->cctx->unsigned_support || !unsigned_pd_request) { 1253 dev_err(&fl->cctx->rpdev->dev, "Error: Untrusted application trying to offload to signed PD\n"); 1254 return true; 1255 } 1256 } 1257 1258 return false; 1259 } 1260 1261 static int fastrpc_init_create_static_process(struct fastrpc_user *fl, 1262 char __user *argp) 1263 { 1264 struct fastrpc_init_create_static init; 1265 struct fastrpc_invoke_args *args; 1266 struct fastrpc_phy_page pages[1]; 1267 char *name; 1268 int err; 1269 bool scm_done = false; 1270 struct { 1271 int client_id; 1272 u32 namelen; 1273 u32 pageslen; 1274 } inbuf; 1275 u32 sc; 1276 1277 args = kcalloc(FASTRPC_CREATE_STATIC_PROCESS_NARGS, sizeof(*args), GFP_KERNEL); 1278 if (!args) 1279 return -ENOMEM; 1280 1281 if (copy_from_user(&init, argp, sizeof(init))) { 1282 err = -EFAULT; 1283 goto err; 1284 } 1285 1286 if (init.namelen > INIT_FILE_NAMELEN_MAX) { 1287 err = -EINVAL; 1288 goto err; 1289 } 1290 1291 name = memdup_user(u64_to_user_ptr(init.name), init.namelen); 1292 if (IS_ERR(name)) { 1293 err = PTR_ERR(name); 1294 goto err; 1295 } 1296 1297 if (!fl->cctx->remote_heap) { 1298 err = fastrpc_remote_heap_alloc(fl, fl->sctx->dev, init.memlen, 1299 &fl->cctx->remote_heap); 1300 if (err) 1301 goto err_name; 1302 1303 /* Map if we have any heap VMIDs associated with this ADSP Static Process. */ 1304 if (fl->cctx->vmcount) { 1305 u64 src_perms = BIT(QCOM_SCM_VMID_HLOS); 1306 1307 err = qcom_scm_assign_mem(fl->cctx->remote_heap->phys, 1308 (u64)fl->cctx->remote_heap->size, 1309 &src_perms, 1310 fl->cctx->vmperms, fl->cctx->vmcount); 1311 if (err) { 1312 dev_err(fl->sctx->dev, "Failed to assign memory with phys 0x%llx size 0x%llx err %d\n", 1313 fl->cctx->remote_heap->phys, fl->cctx->remote_heap->size, err); 1314 goto err_map; 1315 } 1316 scm_done = true; 1317 } 1318 } 1319 1320 inbuf.client_id = fl->client_id; 1321 inbuf.namelen = init.namelen; 1322 inbuf.pageslen = 0; 1323 fl->pd = USER_PD; 1324 1325 args[0].ptr = (u64)(uintptr_t)&inbuf; 1326 args[0].length = sizeof(inbuf); 1327 args[0].fd = -1; 1328 1329 args[1].ptr = (u64)(uintptr_t)name; 1330 args[1].length = inbuf.namelen; 1331 args[1].fd = -1; 1332 1333 pages[0].addr = fl->cctx->remote_heap->phys; 1334 pages[0].size = fl->cctx->remote_heap->size; 1335 1336 args[2].ptr = (u64)(uintptr_t) pages; 1337 args[2].length = sizeof(*pages); 1338 args[2].fd = -1; 1339 1340 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE_STATIC, 3, 0); 1341 1342 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1343 sc, args); 1344 if (err) 1345 goto err_invoke; 1346 1347 kfree(args); 1348 kfree(name); 1349 1350 return 0; 1351 err_invoke: 1352 if (fl->cctx->vmcount && scm_done) { 1353 u64 src_perms = 0; 1354 struct qcom_scm_vmperm dst_perms; 1355 u32 i; 1356 1357 for (i = 0; i < fl->cctx->vmcount; i++) 1358 src_perms |= BIT(fl->cctx->vmperms[i].vmid); 1359 1360 dst_perms.vmid = QCOM_SCM_VMID_HLOS; 1361 dst_perms.perm = QCOM_SCM_PERM_RWX; 1362 err = qcom_scm_assign_mem(fl->cctx->remote_heap->phys, 1363 (u64)fl->cctx->remote_heap->size, 1364 &src_perms, &dst_perms, 1); 1365 if (err) 1366 dev_err(fl->sctx->dev, "Failed to assign memory phys 0x%llx size 0x%llx err %d\n", 1367 fl->cctx->remote_heap->phys, fl->cctx->remote_heap->size, err); 1368 } 1369 err_map: 1370 fastrpc_buf_free(fl->cctx->remote_heap); 1371 err_name: 1372 kfree(name); 1373 err: 1374 kfree(args); 1375 1376 return err; 1377 } 1378 1379 static int fastrpc_init_create_process(struct fastrpc_user *fl, 1380 char __user *argp) 1381 { 1382 struct fastrpc_init_create init; 1383 struct fastrpc_invoke_args *args; 1384 struct fastrpc_phy_page pages[1]; 1385 struct fastrpc_map *map = NULL; 1386 struct fastrpc_buf *imem = NULL; 1387 int memlen; 1388 int err; 1389 struct { 1390 int client_id; 1391 u32 namelen; 1392 u32 filelen; 1393 u32 pageslen; 1394 u32 attrs; 1395 u32 siglen; 1396 } inbuf; 1397 u32 sc; 1398 bool unsigned_module = false; 1399 1400 args = kcalloc(FASTRPC_CREATE_PROCESS_NARGS, sizeof(*args), GFP_KERNEL); 1401 if (!args) 1402 return -ENOMEM; 1403 1404 if (copy_from_user(&init, argp, sizeof(init))) { 1405 err = -EFAULT; 1406 goto err; 1407 } 1408 1409 if (init.attrs & FASTRPC_MODE_UNSIGNED_MODULE) 1410 unsigned_module = true; 1411 1412 if (is_session_rejected(fl, unsigned_module)) { 1413 err = -ECONNREFUSED; 1414 goto err; 1415 } 1416 1417 if (init.filelen > INIT_FILELEN_MAX) { 1418 err = -EINVAL; 1419 goto err; 1420 } 1421 1422 inbuf.client_id = fl->client_id; 1423 inbuf.namelen = strlen(current->comm) + 1; 1424 inbuf.filelen = init.filelen; 1425 inbuf.pageslen = 1; 1426 inbuf.attrs = init.attrs; 1427 inbuf.siglen = init.siglen; 1428 fl->pd = USER_PD; 1429 1430 if (init.filelen && init.filefd) { 1431 err = fastrpc_map_create(fl, init.filefd, init.filelen, 0, &map); 1432 if (err) 1433 goto err; 1434 } 1435 1436 memlen = ALIGN(max(INIT_FILELEN_MAX, (int)init.filelen * 4), 1437 1024 * 1024); 1438 err = fastrpc_buf_alloc(fl, fl->sctx->dev, memlen, 1439 &imem); 1440 if (err) 1441 goto err_alloc; 1442 1443 fl->init_mem = imem; 1444 args[0].ptr = (u64)(uintptr_t)&inbuf; 1445 args[0].length = sizeof(inbuf); 1446 args[0].fd = -1; 1447 1448 args[1].ptr = (u64)(uintptr_t)current->comm; 1449 args[1].length = inbuf.namelen; 1450 args[1].fd = -1; 1451 1452 args[2].ptr = (u64) init.file; 1453 args[2].length = inbuf.filelen; 1454 args[2].fd = init.filefd; 1455 1456 pages[0].addr = imem->phys; 1457 pages[0].size = imem->size; 1458 1459 args[3].ptr = (u64)(uintptr_t) pages; 1460 args[3].length = 1 * sizeof(*pages); 1461 args[3].fd = -1; 1462 1463 args[4].ptr = (u64)(uintptr_t)&inbuf.attrs; 1464 args[4].length = sizeof(inbuf.attrs); 1465 args[4].fd = -1; 1466 1467 args[5].ptr = (u64)(uintptr_t) &inbuf.siglen; 1468 args[5].length = sizeof(inbuf.siglen); 1469 args[5].fd = -1; 1470 1471 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE, 4, 0); 1472 if (init.attrs) 1473 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE_ATTR, 4, 0); 1474 1475 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1476 sc, args); 1477 if (err) 1478 goto err_invoke; 1479 1480 kfree(args); 1481 1482 return 0; 1483 1484 err_invoke: 1485 fl->init_mem = NULL; 1486 fastrpc_buf_free(imem); 1487 err_alloc: 1488 fastrpc_map_put(map); 1489 err: 1490 kfree(args); 1491 1492 return err; 1493 } 1494 1495 static struct fastrpc_session_ctx *fastrpc_session_alloc( 1496 struct fastrpc_user *fl) 1497 { 1498 struct fastrpc_channel_ctx *cctx = fl->cctx; 1499 struct fastrpc_session_ctx *session = NULL; 1500 unsigned long flags; 1501 int i; 1502 1503 spin_lock_irqsave(&cctx->lock, flags); 1504 for (i = 0; i < cctx->sesscount; i++) { 1505 if (!cctx->session[i].used && cctx->session[i].valid) { 1506 cctx->session[i].used = true; 1507 session = &cctx->session[i]; 1508 /* any non-zero ID will work, session_idx + 1 is the simplest one */ 1509 fl->client_id = i + 1; 1510 break; 1511 } 1512 } 1513 spin_unlock_irqrestore(&cctx->lock, flags); 1514 1515 return session; 1516 } 1517 1518 static void fastrpc_session_free(struct fastrpc_channel_ctx *cctx, 1519 struct fastrpc_session_ctx *session) 1520 { 1521 unsigned long flags; 1522 1523 spin_lock_irqsave(&cctx->lock, flags); 1524 session->used = false; 1525 spin_unlock_irqrestore(&cctx->lock, flags); 1526 } 1527 1528 static int fastrpc_release_current_dsp_process(struct fastrpc_user *fl) 1529 { 1530 struct fastrpc_invoke_args args[1]; 1531 int client_id = 0; 1532 u32 sc; 1533 1534 client_id = fl->client_id; 1535 args[0].ptr = (u64)(uintptr_t) &client_id; 1536 args[0].length = sizeof(client_id); 1537 args[0].fd = -1; 1538 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_RELEASE, 1, 0); 1539 1540 return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1541 sc, &args[0]); 1542 } 1543 1544 static int fastrpc_device_release(struct inode *inode, struct file *file) 1545 { 1546 struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; 1547 struct fastrpc_channel_ctx *cctx = fl->cctx; 1548 struct fastrpc_invoke_ctx *ctx, *n; 1549 struct fastrpc_map *map, *m; 1550 struct fastrpc_buf *buf, *b; 1551 unsigned long flags; 1552 1553 fastrpc_release_current_dsp_process(fl); 1554 1555 spin_lock_irqsave(&cctx->lock, flags); 1556 list_del(&fl->user); 1557 spin_unlock_irqrestore(&cctx->lock, flags); 1558 1559 if (fl->init_mem) 1560 fastrpc_buf_free(fl->init_mem); 1561 1562 list_for_each_entry_safe(ctx, n, &fl->pending, node) { 1563 list_del(&ctx->node); 1564 fastrpc_context_put(ctx); 1565 } 1566 1567 list_for_each_entry_safe(map, m, &fl->maps, node) 1568 fastrpc_map_put(map); 1569 1570 list_for_each_entry_safe(buf, b, &fl->mmaps, node) { 1571 list_del(&buf->node); 1572 fastrpc_buf_free(buf); 1573 } 1574 1575 fastrpc_session_free(cctx, fl->sctx); 1576 fastrpc_channel_ctx_put(cctx); 1577 1578 mutex_destroy(&fl->mutex); 1579 kfree(fl); 1580 file->private_data = NULL; 1581 1582 return 0; 1583 } 1584 1585 static int fastrpc_device_open(struct inode *inode, struct file *filp) 1586 { 1587 struct fastrpc_channel_ctx *cctx; 1588 struct fastrpc_device *fdevice; 1589 struct fastrpc_user *fl = NULL; 1590 unsigned long flags; 1591 1592 fdevice = miscdev_to_fdevice(filp->private_data); 1593 cctx = fdevice->cctx; 1594 1595 fl = kzalloc(sizeof(*fl), GFP_KERNEL); 1596 if (!fl) 1597 return -ENOMEM; 1598 1599 /* Released in fastrpc_device_release() */ 1600 fastrpc_channel_ctx_get(cctx); 1601 1602 filp->private_data = fl; 1603 spin_lock_init(&fl->lock); 1604 mutex_init(&fl->mutex); 1605 INIT_LIST_HEAD(&fl->pending); 1606 INIT_LIST_HEAD(&fl->maps); 1607 INIT_LIST_HEAD(&fl->mmaps); 1608 INIT_LIST_HEAD(&fl->user); 1609 fl->cctx = cctx; 1610 fl->is_secure_dev = fdevice->secure; 1611 1612 fl->sctx = fastrpc_session_alloc(fl); 1613 if (!fl->sctx) { 1614 dev_err(&cctx->rpdev->dev, "No session available\n"); 1615 mutex_destroy(&fl->mutex); 1616 kfree(fl); 1617 1618 return -EBUSY; 1619 } 1620 1621 spin_lock_irqsave(&cctx->lock, flags); 1622 list_add_tail(&fl->user, &cctx->users); 1623 spin_unlock_irqrestore(&cctx->lock, flags); 1624 1625 return 0; 1626 } 1627 1628 static int fastrpc_dmabuf_alloc(struct fastrpc_user *fl, char __user *argp) 1629 { 1630 struct fastrpc_alloc_dma_buf bp; 1631 DEFINE_DMA_BUF_EXPORT_INFO(exp_info); 1632 struct fastrpc_buf *buf = NULL; 1633 int err; 1634 1635 if (copy_from_user(&bp, argp, sizeof(bp))) 1636 return -EFAULT; 1637 1638 err = fastrpc_buf_alloc(fl, fl->sctx->dev, bp.size, &buf); 1639 if (err) 1640 return err; 1641 exp_info.ops = &fastrpc_dma_buf_ops; 1642 exp_info.size = bp.size; 1643 exp_info.flags = O_RDWR; 1644 exp_info.priv = buf; 1645 buf->dmabuf = dma_buf_export(&exp_info); 1646 if (IS_ERR(buf->dmabuf)) { 1647 err = PTR_ERR(buf->dmabuf); 1648 fastrpc_buf_free(buf); 1649 return err; 1650 } 1651 1652 bp.fd = dma_buf_fd(buf->dmabuf, O_ACCMODE); 1653 if (bp.fd < 0) { 1654 dma_buf_put(buf->dmabuf); 1655 return -EINVAL; 1656 } 1657 1658 if (copy_to_user(argp, &bp, sizeof(bp))) { 1659 /* 1660 * The usercopy failed, but we can't do much about it, as 1661 * dma_buf_fd() already called fd_install() and made the 1662 * file descriptor accessible for the current process. It 1663 * might already be closed and dmabuf no longer valid when 1664 * we reach this point. Therefore "leak" the fd and rely on 1665 * the process exit path to do any required cleanup. 1666 */ 1667 return -EFAULT; 1668 } 1669 1670 return 0; 1671 } 1672 1673 static int fastrpc_init_attach(struct fastrpc_user *fl, int pd) 1674 { 1675 struct fastrpc_invoke_args args[1]; 1676 int client_id = fl->client_id; 1677 u32 sc; 1678 1679 args[0].ptr = (u64)(uintptr_t) &client_id; 1680 args[0].length = sizeof(client_id); 1681 args[0].fd = -1; 1682 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_ATTACH, 1, 0); 1683 fl->pd = pd; 1684 1685 return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1686 sc, &args[0]); 1687 } 1688 1689 static int fastrpc_invoke(struct fastrpc_user *fl, char __user *argp) 1690 { 1691 struct fastrpc_invoke_args *args = NULL; 1692 struct fastrpc_invoke inv; 1693 u32 nscalars; 1694 int err; 1695 1696 if (copy_from_user(&inv, argp, sizeof(inv))) 1697 return -EFAULT; 1698 1699 /* nscalars is truncated here to max supported value */ 1700 nscalars = REMOTE_SCALARS_LENGTH(inv.sc); 1701 if (nscalars) { 1702 args = kcalloc(nscalars, sizeof(*args), GFP_KERNEL); 1703 if (!args) 1704 return -ENOMEM; 1705 1706 if (copy_from_user(args, (void __user *)(uintptr_t)inv.args, 1707 nscalars * sizeof(*args))) { 1708 kfree(args); 1709 return -EFAULT; 1710 } 1711 } 1712 1713 err = fastrpc_internal_invoke(fl, false, inv.handle, inv.sc, args); 1714 kfree(args); 1715 1716 return err; 1717 } 1718 1719 static int fastrpc_get_info_from_dsp(struct fastrpc_user *fl, uint32_t *dsp_attr_buf, 1720 uint32_t dsp_attr_buf_len) 1721 { 1722 struct fastrpc_invoke_args args[2] = { 0 }; 1723 1724 /* 1725 * Capability filled in userspace. This carries the information 1726 * about the remoteproc support which is fetched from the remoteproc 1727 * sysfs node by userspace. 1728 */ 1729 dsp_attr_buf[0] = 0; 1730 dsp_attr_buf_len -= 1; 1731 1732 args[0].ptr = (u64)(uintptr_t)&dsp_attr_buf_len; 1733 args[0].length = sizeof(dsp_attr_buf_len); 1734 args[0].fd = -1; 1735 args[1].ptr = (u64)(uintptr_t)&dsp_attr_buf[1]; 1736 args[1].length = dsp_attr_buf_len * sizeof(u32); 1737 args[1].fd = -1; 1738 1739 return fastrpc_internal_invoke(fl, true, FASTRPC_DSP_UTILITIES_HANDLE, 1740 FASTRPC_SCALARS(0, 1, 1), args); 1741 } 1742 1743 static int fastrpc_get_info_from_kernel(struct fastrpc_ioctl_capability *cap, 1744 struct fastrpc_user *fl) 1745 { 1746 struct fastrpc_channel_ctx *cctx = fl->cctx; 1747 uint32_t attribute_id = cap->attribute_id; 1748 uint32_t *dsp_attributes; 1749 unsigned long flags; 1750 int err; 1751 1752 spin_lock_irqsave(&cctx->lock, flags); 1753 /* check if we already have queried dsp for attributes */ 1754 if (cctx->valid_attributes) { 1755 spin_unlock_irqrestore(&cctx->lock, flags); 1756 goto done; 1757 } 1758 spin_unlock_irqrestore(&cctx->lock, flags); 1759 1760 dsp_attributes = kzalloc(FASTRPC_MAX_DSP_ATTRIBUTES_LEN, GFP_KERNEL); 1761 if (!dsp_attributes) 1762 return -ENOMEM; 1763 1764 err = fastrpc_get_info_from_dsp(fl, dsp_attributes, FASTRPC_MAX_DSP_ATTRIBUTES); 1765 if (err == DSP_UNSUPPORTED_API) { 1766 dev_info(&cctx->rpdev->dev, 1767 "Warning: DSP capabilities not supported\n"); 1768 kfree(dsp_attributes); 1769 return -EOPNOTSUPP; 1770 } else if (err) { 1771 dev_err(&cctx->rpdev->dev, "Error: dsp information is incorrect err: %d\n", err); 1772 kfree(dsp_attributes); 1773 return err; 1774 } 1775 1776 spin_lock_irqsave(&cctx->lock, flags); 1777 memcpy(cctx->dsp_attributes, dsp_attributes, FASTRPC_MAX_DSP_ATTRIBUTES_LEN); 1778 cctx->valid_attributes = true; 1779 spin_unlock_irqrestore(&cctx->lock, flags); 1780 kfree(dsp_attributes); 1781 done: 1782 cap->capability = cctx->dsp_attributes[attribute_id]; 1783 return 0; 1784 } 1785 1786 static int fastrpc_get_dsp_info(struct fastrpc_user *fl, char __user *argp) 1787 { 1788 struct fastrpc_ioctl_capability cap = {0}; 1789 int err = 0; 1790 1791 if (copy_from_user(&cap, argp, sizeof(cap))) 1792 return -EFAULT; 1793 1794 cap.capability = 0; 1795 1796 if (cap.attribute_id >= FASTRPC_MAX_DSP_ATTRIBUTES) { 1797 dev_err(&fl->cctx->rpdev->dev, "Error: invalid attribute: %d, err: %d\n", 1798 cap.attribute_id, err); 1799 return -EOVERFLOW; 1800 } 1801 1802 err = fastrpc_get_info_from_kernel(&cap, fl); 1803 if (err) 1804 return err; 1805 1806 if (copy_to_user(argp, &cap, sizeof(cap))) 1807 return -EFAULT; 1808 1809 return 0; 1810 } 1811 1812 static int fastrpc_req_munmap_impl(struct fastrpc_user *fl, struct fastrpc_buf *buf) 1813 { 1814 struct fastrpc_invoke_args args[1] = { [0] = { 0 } }; 1815 struct fastrpc_munmap_req_msg req_msg; 1816 struct device *dev = fl->sctx->dev; 1817 int err; 1818 u32 sc; 1819 1820 req_msg.client_id = fl->client_id; 1821 req_msg.size = buf->size; 1822 req_msg.vaddr = buf->raddr; 1823 1824 args[0].ptr = (u64) (uintptr_t) &req_msg; 1825 args[0].length = sizeof(req_msg); 1826 1827 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MUNMAP, 1, 0); 1828 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, 1829 &args[0]); 1830 if (!err) { 1831 dev_dbg(dev, "unmmap\tpt 0x%09lx OK\n", buf->raddr); 1832 spin_lock(&fl->lock); 1833 list_del(&buf->node); 1834 spin_unlock(&fl->lock); 1835 fastrpc_buf_free(buf); 1836 } else { 1837 dev_err(dev, "unmmap\tpt 0x%09lx ERROR\n", buf->raddr); 1838 } 1839 1840 return err; 1841 } 1842 1843 static int fastrpc_req_munmap(struct fastrpc_user *fl, char __user *argp) 1844 { 1845 struct fastrpc_buf *buf = NULL, *iter, *b; 1846 struct fastrpc_req_munmap req; 1847 struct device *dev = fl->sctx->dev; 1848 1849 if (copy_from_user(&req, argp, sizeof(req))) 1850 return -EFAULT; 1851 1852 spin_lock(&fl->lock); 1853 list_for_each_entry_safe(iter, b, &fl->mmaps, node) { 1854 if ((iter->raddr == req.vaddrout) && (iter->size == req.size)) { 1855 buf = iter; 1856 break; 1857 } 1858 } 1859 spin_unlock(&fl->lock); 1860 1861 if (!buf) { 1862 dev_err(dev, "mmap\t\tpt 0x%09llx [len 0x%08llx] not in list\n", 1863 req.vaddrout, req.size); 1864 return -EINVAL; 1865 } 1866 1867 return fastrpc_req_munmap_impl(fl, buf); 1868 } 1869 1870 static int fastrpc_req_mmap(struct fastrpc_user *fl, char __user *argp) 1871 { 1872 struct fastrpc_invoke_args args[3] = { [0 ... 2] = { 0 } }; 1873 struct fastrpc_buf *buf = NULL; 1874 struct fastrpc_mmap_req_msg req_msg; 1875 struct fastrpc_mmap_rsp_msg rsp_msg; 1876 struct fastrpc_phy_page pages; 1877 struct fastrpc_req_mmap req; 1878 struct device *dev = fl->sctx->dev; 1879 int err; 1880 u32 sc; 1881 1882 if (copy_from_user(&req, argp, sizeof(req))) 1883 return -EFAULT; 1884 1885 if (req.flags != ADSP_MMAP_ADD_PAGES && req.flags != ADSP_MMAP_REMOTE_HEAP_ADDR) { 1886 dev_err(dev, "flag not supported 0x%x\n", req.flags); 1887 1888 return -EINVAL; 1889 } 1890 1891 if (req.vaddrin) { 1892 dev_err(dev, "adding user allocated pages is not supported\n"); 1893 return -EINVAL; 1894 } 1895 1896 if (req.flags == ADSP_MMAP_REMOTE_HEAP_ADDR) 1897 err = fastrpc_remote_heap_alloc(fl, dev, req.size, &buf); 1898 else 1899 err = fastrpc_buf_alloc(fl, dev, req.size, &buf); 1900 1901 if (err) { 1902 dev_err(dev, "failed to allocate buffer\n"); 1903 return err; 1904 } 1905 1906 req_msg.client_id = fl->client_id; 1907 req_msg.flags = req.flags; 1908 req_msg.vaddr = req.vaddrin; 1909 req_msg.num = sizeof(pages); 1910 1911 args[0].ptr = (u64) (uintptr_t) &req_msg; 1912 args[0].length = sizeof(req_msg); 1913 1914 pages.addr = buf->phys; 1915 pages.size = buf->size; 1916 1917 args[1].ptr = (u64) (uintptr_t) &pages; 1918 args[1].length = sizeof(pages); 1919 1920 args[2].ptr = (u64) (uintptr_t) &rsp_msg; 1921 args[2].length = sizeof(rsp_msg); 1922 1923 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MMAP, 2, 1); 1924 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, 1925 &args[0]); 1926 if (err) { 1927 dev_err(dev, "mmap error (len 0x%08llx)\n", buf->size); 1928 fastrpc_buf_free(buf); 1929 return err; 1930 } 1931 1932 /* update the buffer to be able to deallocate the memory on the DSP */ 1933 buf->raddr = (uintptr_t) rsp_msg.vaddr; 1934 1935 /* let the client know the address to use */ 1936 req.vaddrout = rsp_msg.vaddr; 1937 1938 /* Add memory to static PD pool, protection thru hypervisor */ 1939 if (req.flags == ADSP_MMAP_REMOTE_HEAP_ADDR && fl->cctx->vmcount) { 1940 u64 src_perms = BIT(QCOM_SCM_VMID_HLOS); 1941 1942 err = qcom_scm_assign_mem(buf->phys, (u64)buf->size, 1943 &src_perms, fl->cctx->vmperms, fl->cctx->vmcount); 1944 if (err) { 1945 dev_err(fl->sctx->dev, "Failed to assign memory phys 0x%llx size 0x%llx err %d", 1946 buf->phys, buf->size, err); 1947 goto err_assign; 1948 } 1949 } 1950 1951 spin_lock(&fl->lock); 1952 list_add_tail(&buf->node, &fl->mmaps); 1953 spin_unlock(&fl->lock); 1954 1955 if (copy_to_user((void __user *)argp, &req, sizeof(req))) { 1956 err = -EFAULT; 1957 goto err_assign; 1958 } 1959 1960 dev_dbg(dev, "mmap\t\tpt 0x%09lx OK [len 0x%08llx]\n", 1961 buf->raddr, buf->size); 1962 1963 return 0; 1964 1965 err_assign: 1966 fastrpc_req_munmap_impl(fl, buf); 1967 1968 return err; 1969 } 1970 1971 static int fastrpc_req_mem_unmap_impl(struct fastrpc_user *fl, struct fastrpc_mem_unmap *req) 1972 { 1973 struct fastrpc_invoke_args args[1] = { [0] = { 0 } }; 1974 struct fastrpc_map *map = NULL, *iter, *m; 1975 struct fastrpc_mem_unmap_req_msg req_msg = { 0 }; 1976 int err = 0; 1977 u32 sc; 1978 struct device *dev = fl->sctx->dev; 1979 1980 spin_lock(&fl->lock); 1981 list_for_each_entry_safe(iter, m, &fl->maps, node) { 1982 if ((req->fd < 0 || iter->fd == req->fd) && (iter->raddr == req->vaddr)) { 1983 map = iter; 1984 break; 1985 } 1986 } 1987 1988 spin_unlock(&fl->lock); 1989 1990 if (!map) { 1991 dev_err(dev, "map not in list\n"); 1992 return -EINVAL; 1993 } 1994 1995 req_msg.client_id = fl->client_id; 1996 req_msg.len = map->len; 1997 req_msg.vaddrin = map->raddr; 1998 req_msg.fd = map->fd; 1999 2000 args[0].ptr = (u64) (uintptr_t) &req_msg; 2001 args[0].length = sizeof(req_msg); 2002 2003 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MEM_UNMAP, 1, 0); 2004 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, 2005 &args[0]); 2006 if (err) { 2007 dev_err(dev, "unmmap\tpt fd = %d, 0x%09llx error\n", map->fd, map->raddr); 2008 return err; 2009 } 2010 fastrpc_map_put(map); 2011 2012 return 0; 2013 } 2014 2015 static int fastrpc_req_mem_unmap(struct fastrpc_user *fl, char __user *argp) 2016 { 2017 struct fastrpc_mem_unmap req; 2018 2019 if (copy_from_user(&req, argp, sizeof(req))) 2020 return -EFAULT; 2021 2022 return fastrpc_req_mem_unmap_impl(fl, &req); 2023 } 2024 2025 static int fastrpc_req_mem_map(struct fastrpc_user *fl, char __user *argp) 2026 { 2027 struct fastrpc_invoke_args args[4] = { [0 ... 3] = { 0 } }; 2028 struct fastrpc_mem_map_req_msg req_msg = { 0 }; 2029 struct fastrpc_mmap_rsp_msg rsp_msg = { 0 }; 2030 struct fastrpc_mem_unmap req_unmap = { 0 }; 2031 struct fastrpc_phy_page pages = { 0 }; 2032 struct fastrpc_mem_map req; 2033 struct device *dev = fl->sctx->dev; 2034 struct fastrpc_map *map = NULL; 2035 int err; 2036 u32 sc; 2037 2038 if (copy_from_user(&req, argp, sizeof(req))) 2039 return -EFAULT; 2040 2041 /* create SMMU mapping */ 2042 err = fastrpc_map_create(fl, req.fd, req.length, 0, &map); 2043 if (err) { 2044 dev_err(dev, "failed to map buffer, fd = %d\n", req.fd); 2045 return err; 2046 } 2047 2048 req_msg.client_id = fl->client_id; 2049 req_msg.fd = req.fd; 2050 req_msg.offset = req.offset; 2051 req_msg.vaddrin = req.vaddrin; 2052 map->va = (void *) (uintptr_t) req.vaddrin; 2053 req_msg.flags = req.flags; 2054 req_msg.num = sizeof(pages); 2055 req_msg.data_len = 0; 2056 2057 args[0].ptr = (u64) (uintptr_t) &req_msg; 2058 args[0].length = sizeof(req_msg); 2059 2060 pages.addr = map->phys; 2061 pages.size = map->len; 2062 2063 args[1].ptr = (u64) (uintptr_t) &pages; 2064 args[1].length = sizeof(pages); 2065 2066 args[2].ptr = (u64) (uintptr_t) &pages; 2067 args[2].length = 0; 2068 2069 args[3].ptr = (u64) (uintptr_t) &rsp_msg; 2070 args[3].length = sizeof(rsp_msg); 2071 2072 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MEM_MAP, 3, 1); 2073 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, &args[0]); 2074 if (err) { 2075 dev_err(dev, "mem mmap error, fd %d, vaddr %llx, size %lld\n", 2076 req.fd, req.vaddrin, map->len); 2077 goto err_invoke; 2078 } 2079 2080 /* update the buffer to be able to deallocate the memory on the DSP */ 2081 map->raddr = rsp_msg.vaddr; 2082 2083 /* let the client know the address to use */ 2084 req.vaddrout = rsp_msg.vaddr; 2085 2086 if (copy_to_user((void __user *)argp, &req, sizeof(req))) { 2087 /* unmap the memory and release the buffer */ 2088 req_unmap.vaddr = (uintptr_t) rsp_msg.vaddr; 2089 req_unmap.length = map->len; 2090 fastrpc_req_mem_unmap_impl(fl, &req_unmap); 2091 return -EFAULT; 2092 } 2093 2094 return 0; 2095 2096 err_invoke: 2097 fastrpc_map_put(map); 2098 2099 return err; 2100 } 2101 2102 static long fastrpc_device_ioctl(struct file *file, unsigned int cmd, 2103 unsigned long arg) 2104 { 2105 struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; 2106 char __user *argp = (char __user *)arg; 2107 int err; 2108 2109 switch (cmd) { 2110 case FASTRPC_IOCTL_INVOKE: 2111 err = fastrpc_invoke(fl, argp); 2112 break; 2113 case FASTRPC_IOCTL_INIT_ATTACH: 2114 err = fastrpc_init_attach(fl, ROOT_PD); 2115 break; 2116 case FASTRPC_IOCTL_INIT_ATTACH_SNS: 2117 err = fastrpc_init_attach(fl, SENSORS_PD); 2118 break; 2119 case FASTRPC_IOCTL_INIT_CREATE_STATIC: 2120 err = fastrpc_init_create_static_process(fl, argp); 2121 break; 2122 case FASTRPC_IOCTL_INIT_CREATE: 2123 err = fastrpc_init_create_process(fl, argp); 2124 break; 2125 case FASTRPC_IOCTL_ALLOC_DMA_BUFF: 2126 err = fastrpc_dmabuf_alloc(fl, argp); 2127 break; 2128 case FASTRPC_IOCTL_MMAP: 2129 err = fastrpc_req_mmap(fl, argp); 2130 break; 2131 case FASTRPC_IOCTL_MUNMAP: 2132 err = fastrpc_req_munmap(fl, argp); 2133 break; 2134 case FASTRPC_IOCTL_MEM_MAP: 2135 err = fastrpc_req_mem_map(fl, argp); 2136 break; 2137 case FASTRPC_IOCTL_MEM_UNMAP: 2138 err = fastrpc_req_mem_unmap(fl, argp); 2139 break; 2140 case FASTRPC_IOCTL_GET_DSP_INFO: 2141 err = fastrpc_get_dsp_info(fl, argp); 2142 break; 2143 default: 2144 err = -ENOTTY; 2145 break; 2146 } 2147 2148 return err; 2149 } 2150 2151 static const struct file_operations fastrpc_fops = { 2152 .open = fastrpc_device_open, 2153 .release = fastrpc_device_release, 2154 .unlocked_ioctl = fastrpc_device_ioctl, 2155 .compat_ioctl = fastrpc_device_ioctl, 2156 }; 2157 2158 static int fastrpc_cb_probe(struct platform_device *pdev) 2159 { 2160 struct fastrpc_channel_ctx *cctx; 2161 struct fastrpc_session_ctx *sess; 2162 struct device *dev = &pdev->dev; 2163 int i, sessions = 0; 2164 unsigned long flags; 2165 int rc; 2166 2167 cctx = dev_get_drvdata(dev->parent); 2168 if (!cctx) 2169 return -EINVAL; 2170 2171 of_property_read_u32(dev->of_node, "qcom,nsessions", &sessions); 2172 2173 spin_lock_irqsave(&cctx->lock, flags); 2174 if (cctx->sesscount >= FASTRPC_MAX_SESSIONS) { 2175 dev_err(&pdev->dev, "too many sessions\n"); 2176 spin_unlock_irqrestore(&cctx->lock, flags); 2177 return -ENOSPC; 2178 } 2179 sess = &cctx->session[cctx->sesscount++]; 2180 sess->used = false; 2181 sess->valid = true; 2182 sess->dev = dev; 2183 dev_set_drvdata(dev, sess); 2184 2185 if (of_property_read_u32(dev->of_node, "reg", &sess->sid)) 2186 dev_info(dev, "FastRPC Session ID not specified in DT\n"); 2187 2188 if (sessions > 0) { 2189 struct fastrpc_session_ctx *dup_sess; 2190 2191 for (i = 1; i < sessions; i++) { 2192 if (cctx->sesscount >= FASTRPC_MAX_SESSIONS) 2193 break; 2194 dup_sess = &cctx->session[cctx->sesscount++]; 2195 memcpy(dup_sess, sess, sizeof(*dup_sess)); 2196 } 2197 } 2198 spin_unlock_irqrestore(&cctx->lock, flags); 2199 rc = dma_set_mask(dev, DMA_BIT_MASK(32)); 2200 if (rc) { 2201 dev_err(dev, "32-bit DMA enable failed\n"); 2202 return rc; 2203 } 2204 2205 return 0; 2206 } 2207 2208 static void fastrpc_cb_remove(struct platform_device *pdev) 2209 { 2210 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(pdev->dev.parent); 2211 struct fastrpc_session_ctx *sess = dev_get_drvdata(&pdev->dev); 2212 unsigned long flags; 2213 int i; 2214 2215 spin_lock_irqsave(&cctx->lock, flags); 2216 for (i = 0; i < FASTRPC_MAX_SESSIONS; i++) { 2217 if (cctx->session[i].sid == sess->sid) { 2218 cctx->session[i].valid = false; 2219 cctx->sesscount--; 2220 } 2221 } 2222 spin_unlock_irqrestore(&cctx->lock, flags); 2223 } 2224 2225 static const struct of_device_id fastrpc_match_table[] = { 2226 { .compatible = "qcom,fastrpc-compute-cb", }, 2227 {} 2228 }; 2229 2230 static struct platform_driver fastrpc_cb_driver = { 2231 .probe = fastrpc_cb_probe, 2232 .remove = fastrpc_cb_remove, 2233 .driver = { 2234 .name = "qcom,fastrpc-cb", 2235 .of_match_table = fastrpc_match_table, 2236 .suppress_bind_attrs = true, 2237 }, 2238 }; 2239 2240 static int fastrpc_device_register(struct device *dev, struct fastrpc_channel_ctx *cctx, 2241 bool is_secured, const char *domain) 2242 { 2243 struct fastrpc_device *fdev; 2244 int err; 2245 2246 fdev = devm_kzalloc(dev, sizeof(*fdev), GFP_KERNEL); 2247 if (!fdev) 2248 return -ENOMEM; 2249 2250 fdev->secure = is_secured; 2251 fdev->cctx = cctx; 2252 fdev->miscdev.minor = MISC_DYNAMIC_MINOR; 2253 fdev->miscdev.fops = &fastrpc_fops; 2254 fdev->miscdev.name = devm_kasprintf(dev, GFP_KERNEL, "fastrpc-%s%s", 2255 domain, is_secured ? "-secure" : ""); 2256 if (!fdev->miscdev.name) 2257 return -ENOMEM; 2258 2259 err = misc_register(&fdev->miscdev); 2260 if (!err) { 2261 if (is_secured) 2262 cctx->secure_fdevice = fdev; 2263 else 2264 cctx->fdevice = fdev; 2265 } 2266 2267 return err; 2268 } 2269 2270 static int fastrpc_get_domain_id(const char *domain) 2271 { 2272 if (!strncmp(domain, "adsp", 4)) 2273 return ADSP_DOMAIN_ID; 2274 else if (!strncmp(domain, "cdsp", 4)) 2275 return CDSP_DOMAIN_ID; 2276 else if (!strncmp(domain, "mdsp", 4)) 2277 return MDSP_DOMAIN_ID; 2278 else if (!strncmp(domain, "sdsp", 4)) 2279 return SDSP_DOMAIN_ID; 2280 else if (!strncmp(domain, "gdsp", 4)) 2281 return GDSP_DOMAIN_ID; 2282 2283 return -EINVAL; 2284 } 2285 2286 static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev) 2287 { 2288 struct device *rdev = &rpdev->dev; 2289 struct fastrpc_channel_ctx *data; 2290 int i, err, domain_id = -1, vmcount; 2291 const char *domain; 2292 bool secure_dsp; 2293 unsigned int vmids[FASTRPC_MAX_VMIDS]; 2294 2295 err = of_property_read_string(rdev->of_node, "label", &domain); 2296 if (err) { 2297 dev_info(rdev, "FastRPC Domain not specified in DT\n"); 2298 return err; 2299 } 2300 2301 domain_id = fastrpc_get_domain_id(domain); 2302 2303 if (domain_id < 0) { 2304 dev_info(rdev, "FastRPC Domain %s not supported\n", domain); 2305 return -EINVAL; 2306 } 2307 2308 if (of_reserved_mem_device_init_by_idx(rdev, rdev->of_node, 0)) 2309 dev_info(rdev, "no reserved DMA memory for FASTRPC\n"); 2310 2311 vmcount = of_property_read_variable_u32_array(rdev->of_node, 2312 "qcom,vmids", &vmids[0], 0, FASTRPC_MAX_VMIDS); 2313 if (vmcount < 0) 2314 vmcount = 0; 2315 else if (!qcom_scm_is_available()) 2316 return -EPROBE_DEFER; 2317 2318 data = kzalloc(sizeof(*data), GFP_KERNEL); 2319 if (!data) 2320 return -ENOMEM; 2321 2322 if (vmcount) { 2323 data->vmcount = vmcount; 2324 for (i = 0; i < data->vmcount; i++) { 2325 data->vmperms[i].vmid = vmids[i]; 2326 data->vmperms[i].perm = QCOM_SCM_PERM_RWX; 2327 } 2328 } 2329 2330 if (domain_id == SDSP_DOMAIN_ID) { 2331 struct resource res; 2332 u64 src_perms; 2333 2334 err = of_reserved_mem_region_to_resource(rdev->of_node, 0, &res); 2335 if (!err) { 2336 src_perms = BIT(QCOM_SCM_VMID_HLOS); 2337 2338 qcom_scm_assign_mem(res.start, resource_size(&res), &src_perms, 2339 data->vmperms, data->vmcount); 2340 } 2341 2342 } 2343 2344 secure_dsp = !(of_property_read_bool(rdev->of_node, "qcom,non-secure-domain")); 2345 data->secure = secure_dsp; 2346 2347 switch (domain_id) { 2348 case ADSP_DOMAIN_ID: 2349 case MDSP_DOMAIN_ID: 2350 case SDSP_DOMAIN_ID: 2351 /* Unsigned PD offloading is only supported on CDSP and GDSP */ 2352 data->unsigned_support = false; 2353 err = fastrpc_device_register(rdev, data, secure_dsp, domain); 2354 if (err) 2355 goto err_free_data; 2356 break; 2357 case CDSP_DOMAIN_ID: 2358 case GDSP_DOMAIN_ID: 2359 data->unsigned_support = true; 2360 /* Create both device nodes so that we can allow both Signed and Unsigned PD */ 2361 err = fastrpc_device_register(rdev, data, true, domain); 2362 if (err) 2363 goto err_free_data; 2364 2365 err = fastrpc_device_register(rdev, data, false, domain); 2366 if (err) 2367 goto err_deregister_fdev; 2368 break; 2369 default: 2370 err = -EINVAL; 2371 goto err_free_data; 2372 } 2373 2374 kref_init(&data->refcount); 2375 2376 dev_set_drvdata(&rpdev->dev, data); 2377 rdev->dma_mask = &data->dma_mask; 2378 dma_set_mask_and_coherent(rdev, DMA_BIT_MASK(32)); 2379 INIT_LIST_HEAD(&data->users); 2380 INIT_LIST_HEAD(&data->invoke_interrupted_mmaps); 2381 spin_lock_init(&data->lock); 2382 idr_init(&data->ctx_idr); 2383 data->domain_id = domain_id; 2384 data->rpdev = rpdev; 2385 2386 err = of_platform_populate(rdev->of_node, NULL, NULL, rdev); 2387 if (err) 2388 goto err_deregister_fdev; 2389 2390 return 0; 2391 2392 err_deregister_fdev: 2393 if (data->fdevice) 2394 misc_deregister(&data->fdevice->miscdev); 2395 if (data->secure_fdevice) 2396 misc_deregister(&data->secure_fdevice->miscdev); 2397 2398 err_free_data: 2399 kfree(data); 2400 return err; 2401 } 2402 2403 static void fastrpc_notify_users(struct fastrpc_user *user) 2404 { 2405 struct fastrpc_invoke_ctx *ctx; 2406 2407 spin_lock(&user->lock); 2408 list_for_each_entry(ctx, &user->pending, node) { 2409 ctx->retval = -EPIPE; 2410 complete(&ctx->work); 2411 } 2412 spin_unlock(&user->lock); 2413 } 2414 2415 static void fastrpc_rpmsg_remove(struct rpmsg_device *rpdev) 2416 { 2417 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); 2418 struct fastrpc_buf *buf, *b; 2419 struct fastrpc_user *user; 2420 unsigned long flags; 2421 2422 /* No invocations past this point */ 2423 spin_lock_irqsave(&cctx->lock, flags); 2424 cctx->rpdev = NULL; 2425 list_for_each_entry(user, &cctx->users, user) 2426 fastrpc_notify_users(user); 2427 spin_unlock_irqrestore(&cctx->lock, flags); 2428 2429 if (cctx->fdevice) 2430 misc_deregister(&cctx->fdevice->miscdev); 2431 2432 if (cctx->secure_fdevice) 2433 misc_deregister(&cctx->secure_fdevice->miscdev); 2434 2435 list_for_each_entry_safe(buf, b, &cctx->invoke_interrupted_mmaps, node) 2436 list_del(&buf->node); 2437 2438 if (cctx->remote_heap) 2439 fastrpc_buf_free(cctx->remote_heap); 2440 2441 of_platform_depopulate(&rpdev->dev); 2442 2443 fastrpc_channel_ctx_put(cctx); 2444 } 2445 2446 static int fastrpc_rpmsg_callback(struct rpmsg_device *rpdev, void *data, 2447 int len, void *priv, u32 addr) 2448 { 2449 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); 2450 struct fastrpc_invoke_rsp *rsp = data; 2451 struct fastrpc_invoke_ctx *ctx; 2452 unsigned long flags; 2453 unsigned long ctxid; 2454 2455 if (len < sizeof(*rsp)) 2456 return -EINVAL; 2457 2458 ctxid = ((rsp->ctx & FASTRPC_CTXID_MASK) >> 4); 2459 2460 spin_lock_irqsave(&cctx->lock, flags); 2461 ctx = idr_find(&cctx->ctx_idr, ctxid); 2462 spin_unlock_irqrestore(&cctx->lock, flags); 2463 2464 if (!ctx) { 2465 dev_err(&rpdev->dev, "No context ID matches response\n"); 2466 return -ENOENT; 2467 } 2468 2469 ctx->retval = rsp->retval; 2470 complete(&ctx->work); 2471 2472 /* 2473 * The DMA buffer associated with the context cannot be freed in 2474 * interrupt context so schedule it through a worker thread to 2475 * avoid a kernel BUG. 2476 */ 2477 schedule_work(&ctx->put_work); 2478 2479 return 0; 2480 } 2481 2482 static const struct of_device_id fastrpc_rpmsg_of_match[] = { 2483 { .compatible = "qcom,fastrpc" }, 2484 { }, 2485 }; 2486 MODULE_DEVICE_TABLE(of, fastrpc_rpmsg_of_match); 2487 2488 static struct rpmsg_driver fastrpc_driver = { 2489 .probe = fastrpc_rpmsg_probe, 2490 .remove = fastrpc_rpmsg_remove, 2491 .callback = fastrpc_rpmsg_callback, 2492 .drv = { 2493 .name = "qcom,fastrpc", 2494 .of_match_table = fastrpc_rpmsg_of_match, 2495 }, 2496 }; 2497 2498 static int fastrpc_init(void) 2499 { 2500 int ret; 2501 2502 ret = platform_driver_register(&fastrpc_cb_driver); 2503 if (ret < 0) { 2504 pr_err("fastrpc: failed to register cb driver\n"); 2505 return ret; 2506 } 2507 2508 ret = register_rpmsg_driver(&fastrpc_driver); 2509 if (ret < 0) { 2510 pr_err("fastrpc: failed to register rpmsg driver\n"); 2511 platform_driver_unregister(&fastrpc_cb_driver); 2512 return ret; 2513 } 2514 2515 return 0; 2516 } 2517 module_init(fastrpc_init); 2518 2519 static void fastrpc_exit(void) 2520 { 2521 platform_driver_unregister(&fastrpc_cb_driver); 2522 unregister_rpmsg_driver(&fastrpc_driver); 2523 } 2524 module_exit(fastrpc_exit); 2525 2526 MODULE_DESCRIPTION("Qualcomm FastRPC"); 2527 MODULE_LICENSE("GPL v2"); 2528 MODULE_IMPORT_NS("DMA_BUF"); 2529