1 // SPDX-License-Identifier: GPL-2.0 2 // Copyright (c) 2011-2018, The Linux Foundation. All rights reserved. 3 // Copyright (c) 2018, Linaro Limited 4 5 #include <linux/completion.h> 6 #include <linux/device.h> 7 #include <linux/dma-buf.h> 8 #include <linux/dma-mapping.h> 9 #include <linux/dma-resv.h> 10 #include <linux/idr.h> 11 #include <linux/list.h> 12 #include <linux/miscdevice.h> 13 #include <linux/module.h> 14 #include <linux/of_address.h> 15 #include <linux/of.h> 16 #include <linux/sort.h> 17 #include <linux/of_platform.h> 18 #include <linux/rpmsg.h> 19 #include <linux/scatterlist.h> 20 #include <linux/slab.h> 21 #include <linux/qcom_scm.h> 22 #include <uapi/misc/fastrpc.h> 23 #include <linux/of_reserved_mem.h> 24 25 #define ADSP_DOMAIN_ID (0) 26 #define MDSP_DOMAIN_ID (1) 27 #define SDSP_DOMAIN_ID (2) 28 #define CDSP_DOMAIN_ID (3) 29 #define FASTRPC_DEV_MAX 4 /* adsp, mdsp, slpi, cdsp*/ 30 #define FASTRPC_MAX_SESSIONS 14 31 #define FASTRPC_MAX_VMIDS 16 32 #define FASTRPC_ALIGN 128 33 #define FASTRPC_MAX_FDLIST 16 34 #define FASTRPC_MAX_CRCLIST 64 35 #define FASTRPC_PHYS(p) ((p) & 0xffffffff) 36 #define FASTRPC_CTX_MAX (256) 37 #define FASTRPC_INIT_HANDLE 1 38 #define FASTRPC_DSP_UTILITIES_HANDLE 2 39 #define FASTRPC_CTXID_MASK (0xFF0) 40 #define INIT_FILELEN_MAX (2 * 1024 * 1024) 41 #define INIT_FILE_NAMELEN_MAX (128) 42 #define FASTRPC_DEVICE_NAME "fastrpc" 43 44 /* Add memory to static PD pool, protection thru XPU */ 45 #define ADSP_MMAP_HEAP_ADDR 4 46 /* MAP static DMA buffer on DSP User PD */ 47 #define ADSP_MMAP_DMA_BUFFER 6 48 /* Add memory to static PD pool protection thru hypervisor */ 49 #define ADSP_MMAP_REMOTE_HEAP_ADDR 8 50 /* Add memory to userPD pool, for user heap */ 51 #define ADSP_MMAP_ADD_PAGES 0x1000 52 /* Add memory to userPD pool, for LLC heap */ 53 #define ADSP_MMAP_ADD_PAGES_LLC 0x3000, 54 55 #define DSP_UNSUPPORTED_API (0x80000414) 56 /* MAX NUMBER of DSP ATTRIBUTES SUPPORTED */ 57 #define FASTRPC_MAX_DSP_ATTRIBUTES (256) 58 #define FASTRPC_MAX_DSP_ATTRIBUTES_LEN (sizeof(u32) * FASTRPC_MAX_DSP_ATTRIBUTES) 59 60 /* Retrives number of input buffers from the scalars parameter */ 61 #define REMOTE_SCALARS_INBUFS(sc) (((sc) >> 16) & 0x0ff) 62 63 /* Retrives number of output buffers from the scalars parameter */ 64 #define REMOTE_SCALARS_OUTBUFS(sc) (((sc) >> 8) & 0x0ff) 65 66 /* Retrives number of input handles from the scalars parameter */ 67 #define REMOTE_SCALARS_INHANDLES(sc) (((sc) >> 4) & 0x0f) 68 69 /* Retrives number of output handles from the scalars parameter */ 70 #define REMOTE_SCALARS_OUTHANDLES(sc) ((sc) & 0x0f) 71 72 #define REMOTE_SCALARS_LENGTH(sc) (REMOTE_SCALARS_INBUFS(sc) + \ 73 REMOTE_SCALARS_OUTBUFS(sc) + \ 74 REMOTE_SCALARS_INHANDLES(sc)+ \ 75 REMOTE_SCALARS_OUTHANDLES(sc)) 76 #define FASTRPC_BUILD_SCALARS(attr, method, in, out, oin, oout) \ 77 (((attr & 0x07) << 29) | \ 78 ((method & 0x1f) << 24) | \ 79 ((in & 0xff) << 16) | \ 80 ((out & 0xff) << 8) | \ 81 ((oin & 0x0f) << 4) | \ 82 (oout & 0x0f)) 83 84 #define FASTRPC_SCALARS(method, in, out) \ 85 FASTRPC_BUILD_SCALARS(0, method, in, out, 0, 0) 86 87 #define FASTRPC_CREATE_PROCESS_NARGS 6 88 #define FASTRPC_CREATE_STATIC_PROCESS_NARGS 3 89 /* Remote Method id table */ 90 #define FASTRPC_RMID_INIT_ATTACH 0 91 #define FASTRPC_RMID_INIT_RELEASE 1 92 #define FASTRPC_RMID_INIT_MMAP 4 93 #define FASTRPC_RMID_INIT_MUNMAP 5 94 #define FASTRPC_RMID_INIT_CREATE 6 95 #define FASTRPC_RMID_INIT_CREATE_ATTR 7 96 #define FASTRPC_RMID_INIT_CREATE_STATIC 8 97 #define FASTRPC_RMID_INIT_MEM_MAP 10 98 #define FASTRPC_RMID_INIT_MEM_UNMAP 11 99 100 /* Protection Domain(PD) ids */ 101 #define ROOT_PD (0) 102 #define USER_PD (1) 103 #define SENSORS_PD (2) 104 105 #define miscdev_to_fdevice(d) container_of(d, struct fastrpc_device, miscdev) 106 107 static const char *domains[FASTRPC_DEV_MAX] = { "adsp", "mdsp", 108 "sdsp", "cdsp"}; 109 struct fastrpc_phy_page { 110 u64 addr; /* physical address */ 111 u64 size; /* size of contiguous region */ 112 }; 113 114 struct fastrpc_invoke_buf { 115 u32 num; /* number of contiguous regions */ 116 u32 pgidx; /* index to start of contiguous region */ 117 }; 118 119 struct fastrpc_remote_dmahandle { 120 s32 fd; /* dma handle fd */ 121 u32 offset; /* dma handle offset */ 122 u32 len; /* dma handle length */ 123 }; 124 125 struct fastrpc_remote_buf { 126 u64 pv; /* buffer pointer */ 127 u64 len; /* length of buffer */ 128 }; 129 130 union fastrpc_remote_arg { 131 struct fastrpc_remote_buf buf; 132 struct fastrpc_remote_dmahandle dma; 133 }; 134 135 struct fastrpc_mmap_rsp_msg { 136 u64 vaddr; 137 }; 138 139 struct fastrpc_mmap_req_msg { 140 s32 pgid; 141 u32 flags; 142 u64 vaddr; 143 s32 num; 144 }; 145 146 struct fastrpc_mem_map_req_msg { 147 s32 pgid; 148 s32 fd; 149 s32 offset; 150 u32 flags; 151 u64 vaddrin; 152 s32 num; 153 s32 data_len; 154 }; 155 156 struct fastrpc_munmap_req_msg { 157 s32 pgid; 158 u64 vaddr; 159 u64 size; 160 }; 161 162 struct fastrpc_mem_unmap_req_msg { 163 s32 pgid; 164 s32 fd; 165 u64 vaddrin; 166 u64 len; 167 }; 168 169 struct fastrpc_msg { 170 int pid; /* process group id */ 171 int tid; /* thread id */ 172 u64 ctx; /* invoke caller context */ 173 u32 handle; /* handle to invoke */ 174 u32 sc; /* scalars structure describing the data */ 175 u64 addr; /* physical address */ 176 u64 size; /* size of contiguous region */ 177 }; 178 179 struct fastrpc_invoke_rsp { 180 u64 ctx; /* invoke caller context */ 181 int retval; /* invoke return value */ 182 }; 183 184 struct fastrpc_buf_overlap { 185 u64 start; 186 u64 end; 187 int raix; 188 u64 mstart; 189 u64 mend; 190 u64 offset; 191 }; 192 193 struct fastrpc_buf { 194 struct fastrpc_user *fl; 195 struct dma_buf *dmabuf; 196 struct device *dev; 197 void *virt; 198 u64 phys; 199 u64 size; 200 /* Lock for dma buf attachments */ 201 struct mutex lock; 202 struct list_head attachments; 203 /* mmap support */ 204 struct list_head node; /* list of user requested mmaps */ 205 uintptr_t raddr; 206 }; 207 208 struct fastrpc_dma_buf_attachment { 209 struct device *dev; 210 struct sg_table sgt; 211 struct list_head node; 212 }; 213 214 struct fastrpc_map { 215 struct list_head node; 216 struct fastrpc_user *fl; 217 int fd; 218 struct dma_buf *buf; 219 struct sg_table *table; 220 struct dma_buf_attachment *attach; 221 u64 phys; 222 u64 size; 223 void *va; 224 u64 len; 225 u64 raddr; 226 u32 attr; 227 struct kref refcount; 228 }; 229 230 struct fastrpc_invoke_ctx { 231 int nscalars; 232 int nbufs; 233 int retval; 234 int pid; 235 int tgid; 236 u32 sc; 237 u32 *crc; 238 u64 ctxid; 239 u64 msg_sz; 240 struct kref refcount; 241 struct list_head node; /* list of ctxs */ 242 struct completion work; 243 struct work_struct put_work; 244 struct fastrpc_msg msg; 245 struct fastrpc_user *fl; 246 union fastrpc_remote_arg *rpra; 247 struct fastrpc_map **maps; 248 struct fastrpc_buf *buf; 249 struct fastrpc_invoke_args *args; 250 struct fastrpc_buf_overlap *olaps; 251 struct fastrpc_channel_ctx *cctx; 252 }; 253 254 struct fastrpc_session_ctx { 255 struct device *dev; 256 int sid; 257 bool used; 258 bool valid; 259 }; 260 261 struct fastrpc_channel_ctx { 262 int domain_id; 263 int sesscount; 264 int vmcount; 265 u32 perms; 266 struct qcom_scm_vmperm vmperms[FASTRPC_MAX_VMIDS]; 267 struct rpmsg_device *rpdev; 268 struct fastrpc_session_ctx session[FASTRPC_MAX_SESSIONS]; 269 spinlock_t lock; 270 struct idr ctx_idr; 271 struct list_head users; 272 struct kref refcount; 273 /* Flag if dsp attributes are cached */ 274 bool valid_attributes; 275 u32 dsp_attributes[FASTRPC_MAX_DSP_ATTRIBUTES]; 276 struct fastrpc_device *secure_fdevice; 277 struct fastrpc_device *fdevice; 278 struct fastrpc_buf *remote_heap; 279 struct list_head invoke_interrupted_mmaps; 280 bool secure; 281 bool unsigned_support; 282 u64 dma_mask; 283 }; 284 285 struct fastrpc_device { 286 struct fastrpc_channel_ctx *cctx; 287 struct miscdevice miscdev; 288 bool secure; 289 }; 290 291 struct fastrpc_user { 292 struct list_head user; 293 struct list_head maps; 294 struct list_head pending; 295 struct list_head mmaps; 296 297 struct fastrpc_channel_ctx *cctx; 298 struct fastrpc_session_ctx *sctx; 299 struct fastrpc_buf *init_mem; 300 301 int tgid; 302 int pd; 303 bool is_secure_dev; 304 /* Lock for lists */ 305 spinlock_t lock; 306 /* lock for allocations */ 307 struct mutex mutex; 308 }; 309 310 static void fastrpc_free_map(struct kref *ref) 311 { 312 struct fastrpc_map *map; 313 314 map = container_of(ref, struct fastrpc_map, refcount); 315 316 if (map->table) { 317 if (map->attr & FASTRPC_ATTR_SECUREMAP) { 318 struct qcom_scm_vmperm perm; 319 int err = 0; 320 321 perm.vmid = QCOM_SCM_VMID_HLOS; 322 perm.perm = QCOM_SCM_PERM_RWX; 323 err = qcom_scm_assign_mem(map->phys, map->size, 324 &(map->fl->cctx->vmperms[0].vmid), &perm, 1); 325 if (err) { 326 dev_err(map->fl->sctx->dev, "Failed to assign memory phys 0x%llx size 0x%llx err %d", 327 map->phys, map->size, err); 328 return; 329 } 330 } 331 dma_buf_unmap_attachment_unlocked(map->attach, map->table, 332 DMA_BIDIRECTIONAL); 333 dma_buf_detach(map->buf, map->attach); 334 dma_buf_put(map->buf); 335 } 336 337 kfree(map); 338 } 339 340 static void fastrpc_map_put(struct fastrpc_map *map) 341 { 342 if (map) 343 kref_put(&map->refcount, fastrpc_free_map); 344 } 345 346 static void fastrpc_map_get(struct fastrpc_map *map) 347 { 348 if (map) 349 kref_get(&map->refcount); 350 } 351 352 353 static int fastrpc_map_lookup(struct fastrpc_user *fl, int fd, 354 struct fastrpc_map **ppmap) 355 { 356 struct fastrpc_map *map = NULL; 357 358 mutex_lock(&fl->mutex); 359 list_for_each_entry(map, &fl->maps, node) { 360 if (map->fd == fd) { 361 *ppmap = map; 362 mutex_unlock(&fl->mutex); 363 return 0; 364 } 365 } 366 mutex_unlock(&fl->mutex); 367 368 return -ENOENT; 369 } 370 371 static int fastrpc_map_find(struct fastrpc_user *fl, int fd, 372 struct fastrpc_map **ppmap) 373 { 374 int ret = fastrpc_map_lookup(fl, fd, ppmap); 375 376 if (!ret) 377 fastrpc_map_get(*ppmap); 378 379 return ret; 380 } 381 382 static void fastrpc_buf_free(struct fastrpc_buf *buf) 383 { 384 dma_free_coherent(buf->dev, buf->size, buf->virt, 385 FASTRPC_PHYS(buf->phys)); 386 kfree(buf); 387 } 388 389 static int __fastrpc_buf_alloc(struct fastrpc_user *fl, struct device *dev, 390 u64 size, struct fastrpc_buf **obuf) 391 { 392 struct fastrpc_buf *buf; 393 394 buf = kzalloc(sizeof(*buf), GFP_KERNEL); 395 if (!buf) 396 return -ENOMEM; 397 398 INIT_LIST_HEAD(&buf->attachments); 399 INIT_LIST_HEAD(&buf->node); 400 mutex_init(&buf->lock); 401 402 buf->fl = fl; 403 buf->virt = NULL; 404 buf->phys = 0; 405 buf->size = size; 406 buf->dev = dev; 407 buf->raddr = 0; 408 409 buf->virt = dma_alloc_coherent(dev, buf->size, (dma_addr_t *)&buf->phys, 410 GFP_KERNEL); 411 if (!buf->virt) { 412 mutex_destroy(&buf->lock); 413 kfree(buf); 414 return -ENOMEM; 415 } 416 417 *obuf = buf; 418 419 return 0; 420 } 421 422 static int fastrpc_buf_alloc(struct fastrpc_user *fl, struct device *dev, 423 u64 size, struct fastrpc_buf **obuf) 424 { 425 int ret; 426 struct fastrpc_buf *buf; 427 428 ret = __fastrpc_buf_alloc(fl, dev, size, obuf); 429 if (ret) 430 return ret; 431 432 buf = *obuf; 433 434 if (fl->sctx && fl->sctx->sid) 435 buf->phys += ((u64)fl->sctx->sid << 32); 436 437 return 0; 438 } 439 440 static int fastrpc_remote_heap_alloc(struct fastrpc_user *fl, struct device *dev, 441 u64 size, struct fastrpc_buf **obuf) 442 { 443 struct device *rdev = &fl->cctx->rpdev->dev; 444 445 return __fastrpc_buf_alloc(fl, rdev, size, obuf); 446 } 447 448 static void fastrpc_channel_ctx_free(struct kref *ref) 449 { 450 struct fastrpc_channel_ctx *cctx; 451 452 cctx = container_of(ref, struct fastrpc_channel_ctx, refcount); 453 454 kfree(cctx); 455 } 456 457 static void fastrpc_channel_ctx_get(struct fastrpc_channel_ctx *cctx) 458 { 459 kref_get(&cctx->refcount); 460 } 461 462 static void fastrpc_channel_ctx_put(struct fastrpc_channel_ctx *cctx) 463 { 464 kref_put(&cctx->refcount, fastrpc_channel_ctx_free); 465 } 466 467 static void fastrpc_context_free(struct kref *ref) 468 { 469 struct fastrpc_invoke_ctx *ctx; 470 struct fastrpc_channel_ctx *cctx; 471 unsigned long flags; 472 int i; 473 474 ctx = container_of(ref, struct fastrpc_invoke_ctx, refcount); 475 cctx = ctx->cctx; 476 477 for (i = 0; i < ctx->nbufs; i++) 478 fastrpc_map_put(ctx->maps[i]); 479 480 if (ctx->buf) 481 fastrpc_buf_free(ctx->buf); 482 483 spin_lock_irqsave(&cctx->lock, flags); 484 idr_remove(&cctx->ctx_idr, ctx->ctxid >> 4); 485 spin_unlock_irqrestore(&cctx->lock, flags); 486 487 kfree(ctx->maps); 488 kfree(ctx->olaps); 489 kfree(ctx); 490 491 fastrpc_channel_ctx_put(cctx); 492 } 493 494 static void fastrpc_context_get(struct fastrpc_invoke_ctx *ctx) 495 { 496 kref_get(&ctx->refcount); 497 } 498 499 static void fastrpc_context_put(struct fastrpc_invoke_ctx *ctx) 500 { 501 kref_put(&ctx->refcount, fastrpc_context_free); 502 } 503 504 static void fastrpc_context_put_wq(struct work_struct *work) 505 { 506 struct fastrpc_invoke_ctx *ctx = 507 container_of(work, struct fastrpc_invoke_ctx, put_work); 508 509 fastrpc_context_put(ctx); 510 } 511 512 #define CMP(aa, bb) ((aa) == (bb) ? 0 : (aa) < (bb) ? -1 : 1) 513 static int olaps_cmp(const void *a, const void *b) 514 { 515 struct fastrpc_buf_overlap *pa = (struct fastrpc_buf_overlap *)a; 516 struct fastrpc_buf_overlap *pb = (struct fastrpc_buf_overlap *)b; 517 /* sort with lowest starting buffer first */ 518 int st = CMP(pa->start, pb->start); 519 /* sort with highest ending buffer first */ 520 int ed = CMP(pb->end, pa->end); 521 522 return st == 0 ? ed : st; 523 } 524 525 static void fastrpc_get_buff_overlaps(struct fastrpc_invoke_ctx *ctx) 526 { 527 u64 max_end = 0; 528 int i; 529 530 for (i = 0; i < ctx->nbufs; ++i) { 531 ctx->olaps[i].start = ctx->args[i].ptr; 532 ctx->olaps[i].end = ctx->olaps[i].start + ctx->args[i].length; 533 ctx->olaps[i].raix = i; 534 } 535 536 sort(ctx->olaps, ctx->nbufs, sizeof(*ctx->olaps), olaps_cmp, NULL); 537 538 for (i = 0; i < ctx->nbufs; ++i) { 539 /* Falling inside previous range */ 540 if (ctx->olaps[i].start < max_end) { 541 ctx->olaps[i].mstart = max_end; 542 ctx->olaps[i].mend = ctx->olaps[i].end; 543 ctx->olaps[i].offset = max_end - ctx->olaps[i].start; 544 545 if (ctx->olaps[i].end > max_end) { 546 max_end = ctx->olaps[i].end; 547 } else { 548 ctx->olaps[i].mend = 0; 549 ctx->olaps[i].mstart = 0; 550 } 551 552 } else { 553 ctx->olaps[i].mend = ctx->olaps[i].end; 554 ctx->olaps[i].mstart = ctx->olaps[i].start; 555 ctx->olaps[i].offset = 0; 556 max_end = ctx->olaps[i].end; 557 } 558 } 559 } 560 561 static struct fastrpc_invoke_ctx *fastrpc_context_alloc( 562 struct fastrpc_user *user, u32 kernel, u32 sc, 563 struct fastrpc_invoke_args *args) 564 { 565 struct fastrpc_channel_ctx *cctx = user->cctx; 566 struct fastrpc_invoke_ctx *ctx = NULL; 567 unsigned long flags; 568 int ret; 569 570 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 571 if (!ctx) 572 return ERR_PTR(-ENOMEM); 573 574 INIT_LIST_HEAD(&ctx->node); 575 ctx->fl = user; 576 ctx->nscalars = REMOTE_SCALARS_LENGTH(sc); 577 ctx->nbufs = REMOTE_SCALARS_INBUFS(sc) + 578 REMOTE_SCALARS_OUTBUFS(sc); 579 580 if (ctx->nscalars) { 581 ctx->maps = kcalloc(ctx->nscalars, 582 sizeof(*ctx->maps), GFP_KERNEL); 583 if (!ctx->maps) { 584 kfree(ctx); 585 return ERR_PTR(-ENOMEM); 586 } 587 ctx->olaps = kcalloc(ctx->nscalars, 588 sizeof(*ctx->olaps), GFP_KERNEL); 589 if (!ctx->olaps) { 590 kfree(ctx->maps); 591 kfree(ctx); 592 return ERR_PTR(-ENOMEM); 593 } 594 ctx->args = args; 595 fastrpc_get_buff_overlaps(ctx); 596 } 597 598 /* Released in fastrpc_context_put() */ 599 fastrpc_channel_ctx_get(cctx); 600 601 ctx->sc = sc; 602 ctx->retval = -1; 603 ctx->pid = current->pid; 604 ctx->tgid = user->tgid; 605 ctx->cctx = cctx; 606 init_completion(&ctx->work); 607 INIT_WORK(&ctx->put_work, fastrpc_context_put_wq); 608 609 spin_lock(&user->lock); 610 list_add_tail(&ctx->node, &user->pending); 611 spin_unlock(&user->lock); 612 613 spin_lock_irqsave(&cctx->lock, flags); 614 ret = idr_alloc_cyclic(&cctx->ctx_idr, ctx, 1, 615 FASTRPC_CTX_MAX, GFP_ATOMIC); 616 if (ret < 0) { 617 spin_unlock_irqrestore(&cctx->lock, flags); 618 goto err_idr; 619 } 620 ctx->ctxid = ret << 4; 621 spin_unlock_irqrestore(&cctx->lock, flags); 622 623 kref_init(&ctx->refcount); 624 625 return ctx; 626 err_idr: 627 spin_lock(&user->lock); 628 list_del(&ctx->node); 629 spin_unlock(&user->lock); 630 fastrpc_channel_ctx_put(cctx); 631 kfree(ctx->maps); 632 kfree(ctx->olaps); 633 kfree(ctx); 634 635 return ERR_PTR(ret); 636 } 637 638 static struct sg_table * 639 fastrpc_map_dma_buf(struct dma_buf_attachment *attachment, 640 enum dma_data_direction dir) 641 { 642 struct fastrpc_dma_buf_attachment *a = attachment->priv; 643 struct sg_table *table; 644 int ret; 645 646 table = &a->sgt; 647 648 ret = dma_map_sgtable(attachment->dev, table, dir, 0); 649 if (ret) 650 table = ERR_PTR(ret); 651 return table; 652 } 653 654 static void fastrpc_unmap_dma_buf(struct dma_buf_attachment *attach, 655 struct sg_table *table, 656 enum dma_data_direction dir) 657 { 658 dma_unmap_sgtable(attach->dev, table, dir, 0); 659 } 660 661 static void fastrpc_release(struct dma_buf *dmabuf) 662 { 663 struct fastrpc_buf *buffer = dmabuf->priv; 664 665 fastrpc_buf_free(buffer); 666 } 667 668 static int fastrpc_dma_buf_attach(struct dma_buf *dmabuf, 669 struct dma_buf_attachment *attachment) 670 { 671 struct fastrpc_dma_buf_attachment *a; 672 struct fastrpc_buf *buffer = dmabuf->priv; 673 int ret; 674 675 a = kzalloc(sizeof(*a), GFP_KERNEL); 676 if (!a) 677 return -ENOMEM; 678 679 ret = dma_get_sgtable(buffer->dev, &a->sgt, buffer->virt, 680 FASTRPC_PHYS(buffer->phys), buffer->size); 681 if (ret < 0) { 682 dev_err(buffer->dev, "failed to get scatterlist from DMA API\n"); 683 kfree(a); 684 return -EINVAL; 685 } 686 687 a->dev = attachment->dev; 688 INIT_LIST_HEAD(&a->node); 689 attachment->priv = a; 690 691 mutex_lock(&buffer->lock); 692 list_add(&a->node, &buffer->attachments); 693 mutex_unlock(&buffer->lock); 694 695 return 0; 696 } 697 698 static void fastrpc_dma_buf_detatch(struct dma_buf *dmabuf, 699 struct dma_buf_attachment *attachment) 700 { 701 struct fastrpc_dma_buf_attachment *a = attachment->priv; 702 struct fastrpc_buf *buffer = dmabuf->priv; 703 704 mutex_lock(&buffer->lock); 705 list_del(&a->node); 706 mutex_unlock(&buffer->lock); 707 sg_free_table(&a->sgt); 708 kfree(a); 709 } 710 711 static int fastrpc_vmap(struct dma_buf *dmabuf, struct iosys_map *map) 712 { 713 struct fastrpc_buf *buf = dmabuf->priv; 714 715 iosys_map_set_vaddr(map, buf->virt); 716 717 return 0; 718 } 719 720 static int fastrpc_mmap(struct dma_buf *dmabuf, 721 struct vm_area_struct *vma) 722 { 723 struct fastrpc_buf *buf = dmabuf->priv; 724 size_t size = vma->vm_end - vma->vm_start; 725 726 dma_resv_assert_held(dmabuf->resv); 727 728 return dma_mmap_coherent(buf->dev, vma, buf->virt, 729 FASTRPC_PHYS(buf->phys), size); 730 } 731 732 static const struct dma_buf_ops fastrpc_dma_buf_ops = { 733 .attach = fastrpc_dma_buf_attach, 734 .detach = fastrpc_dma_buf_detatch, 735 .map_dma_buf = fastrpc_map_dma_buf, 736 .unmap_dma_buf = fastrpc_unmap_dma_buf, 737 .mmap = fastrpc_mmap, 738 .vmap = fastrpc_vmap, 739 .release = fastrpc_release, 740 }; 741 742 static int fastrpc_map_create(struct fastrpc_user *fl, int fd, 743 u64 len, u32 attr, struct fastrpc_map **ppmap) 744 { 745 struct fastrpc_session_ctx *sess = fl->sctx; 746 struct fastrpc_map *map = NULL; 747 int err = 0; 748 749 if (!fastrpc_map_find(fl, fd, ppmap)) 750 return 0; 751 752 map = kzalloc(sizeof(*map), GFP_KERNEL); 753 if (!map) 754 return -ENOMEM; 755 756 INIT_LIST_HEAD(&map->node); 757 kref_init(&map->refcount); 758 759 map->fl = fl; 760 map->fd = fd; 761 map->buf = dma_buf_get(fd); 762 if (IS_ERR(map->buf)) { 763 err = PTR_ERR(map->buf); 764 goto get_err; 765 } 766 767 map->attach = dma_buf_attach(map->buf, sess->dev); 768 if (IS_ERR(map->attach)) { 769 dev_err(sess->dev, "Failed to attach dmabuf\n"); 770 err = PTR_ERR(map->attach); 771 goto attach_err; 772 } 773 774 map->table = dma_buf_map_attachment_unlocked(map->attach, DMA_BIDIRECTIONAL); 775 if (IS_ERR(map->table)) { 776 err = PTR_ERR(map->table); 777 goto map_err; 778 } 779 780 map->phys = sg_dma_address(map->table->sgl); 781 map->phys += ((u64)fl->sctx->sid << 32); 782 map->size = len; 783 map->va = sg_virt(map->table->sgl); 784 map->len = len; 785 786 if (attr & FASTRPC_ATTR_SECUREMAP) { 787 /* 788 * If subsystem VMIDs are defined in DTSI, then do 789 * hyp_assign from HLOS to those VM(s) 790 */ 791 unsigned int perms = BIT(QCOM_SCM_VMID_HLOS); 792 793 map->attr = attr; 794 err = qcom_scm_assign_mem(map->phys, (u64)map->size, &perms, 795 fl->cctx->vmperms, fl->cctx->vmcount); 796 if (err) { 797 dev_err(sess->dev, "Failed to assign memory with phys 0x%llx size 0x%llx err %d", 798 map->phys, map->size, err); 799 goto map_err; 800 } 801 } 802 spin_lock(&fl->lock); 803 list_add_tail(&map->node, &fl->maps); 804 spin_unlock(&fl->lock); 805 *ppmap = map; 806 807 return 0; 808 809 map_err: 810 dma_buf_detach(map->buf, map->attach); 811 attach_err: 812 dma_buf_put(map->buf); 813 get_err: 814 fastrpc_map_put(map); 815 816 return err; 817 } 818 819 /* 820 * Fastrpc payload buffer with metadata looks like: 821 * 822 * >>>>>> START of METADATA <<<<<<<<< 823 * +---------------------------------+ 824 * | Arguments | 825 * | type:(union fastrpc_remote_arg)| 826 * | (0 - N) | 827 * +---------------------------------+ 828 * | Invoke Buffer list | 829 * | type:(struct fastrpc_invoke_buf)| 830 * | (0 - N) | 831 * +---------------------------------+ 832 * | Page info list | 833 * | type:(struct fastrpc_phy_page) | 834 * | (0 - N) | 835 * +---------------------------------+ 836 * | Optional info | 837 * |(can be specific to SoC/Firmware)| 838 * +---------------------------------+ 839 * >>>>>>>> END of METADATA <<<<<<<<< 840 * +---------------------------------+ 841 * | Inline ARGS | 842 * | (0-N) | 843 * +---------------------------------+ 844 */ 845 846 static int fastrpc_get_meta_size(struct fastrpc_invoke_ctx *ctx) 847 { 848 int size = 0; 849 850 size = (sizeof(struct fastrpc_remote_buf) + 851 sizeof(struct fastrpc_invoke_buf) + 852 sizeof(struct fastrpc_phy_page)) * ctx->nscalars + 853 sizeof(u64) * FASTRPC_MAX_FDLIST + 854 sizeof(u32) * FASTRPC_MAX_CRCLIST; 855 856 return size; 857 } 858 859 static u64 fastrpc_get_payload_size(struct fastrpc_invoke_ctx *ctx, int metalen) 860 { 861 u64 size = 0; 862 int oix; 863 864 size = ALIGN(metalen, FASTRPC_ALIGN); 865 for (oix = 0; oix < ctx->nbufs; oix++) { 866 int i = ctx->olaps[oix].raix; 867 868 if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1) { 869 870 if (ctx->olaps[oix].offset == 0) 871 size = ALIGN(size, FASTRPC_ALIGN); 872 873 size += (ctx->olaps[oix].mend - ctx->olaps[oix].mstart); 874 } 875 } 876 877 return size; 878 } 879 880 static int fastrpc_create_maps(struct fastrpc_invoke_ctx *ctx) 881 { 882 struct device *dev = ctx->fl->sctx->dev; 883 int i, err; 884 885 for (i = 0; i < ctx->nscalars; ++i) { 886 887 if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1 || 888 ctx->args[i].length == 0) 889 continue; 890 891 err = fastrpc_map_create(ctx->fl, ctx->args[i].fd, 892 ctx->args[i].length, ctx->args[i].attr, &ctx->maps[i]); 893 if (err) { 894 dev_err(dev, "Error Creating map %d\n", err); 895 return -EINVAL; 896 } 897 898 } 899 return 0; 900 } 901 902 static struct fastrpc_invoke_buf *fastrpc_invoke_buf_start(union fastrpc_remote_arg *pra, int len) 903 { 904 return (struct fastrpc_invoke_buf *)(&pra[len]); 905 } 906 907 static struct fastrpc_phy_page *fastrpc_phy_page_start(struct fastrpc_invoke_buf *buf, int len) 908 { 909 return (struct fastrpc_phy_page *)(&buf[len]); 910 } 911 912 static int fastrpc_get_args(u32 kernel, struct fastrpc_invoke_ctx *ctx) 913 { 914 struct device *dev = ctx->fl->sctx->dev; 915 union fastrpc_remote_arg *rpra; 916 struct fastrpc_invoke_buf *list; 917 struct fastrpc_phy_page *pages; 918 int inbufs, i, oix, err = 0; 919 u64 len, rlen, pkt_size; 920 u64 pg_start, pg_end; 921 uintptr_t args; 922 int metalen; 923 924 inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); 925 metalen = fastrpc_get_meta_size(ctx); 926 pkt_size = fastrpc_get_payload_size(ctx, metalen); 927 928 err = fastrpc_create_maps(ctx); 929 if (err) 930 return err; 931 932 ctx->msg_sz = pkt_size; 933 934 err = fastrpc_buf_alloc(ctx->fl, dev, pkt_size, &ctx->buf); 935 if (err) 936 return err; 937 938 rpra = ctx->buf->virt; 939 list = fastrpc_invoke_buf_start(rpra, ctx->nscalars); 940 pages = fastrpc_phy_page_start(list, ctx->nscalars); 941 args = (uintptr_t)ctx->buf->virt + metalen; 942 rlen = pkt_size - metalen; 943 ctx->rpra = rpra; 944 945 for (oix = 0; oix < ctx->nbufs; ++oix) { 946 int mlen; 947 948 i = ctx->olaps[oix].raix; 949 len = ctx->args[i].length; 950 951 rpra[i].buf.pv = 0; 952 rpra[i].buf.len = len; 953 list[i].num = len ? 1 : 0; 954 list[i].pgidx = i; 955 956 if (!len) 957 continue; 958 959 if (ctx->maps[i]) { 960 struct vm_area_struct *vma = NULL; 961 962 rpra[i].buf.pv = (u64) ctx->args[i].ptr; 963 pages[i].addr = ctx->maps[i]->phys; 964 965 mmap_read_lock(current->mm); 966 vma = find_vma(current->mm, ctx->args[i].ptr); 967 if (vma) 968 pages[i].addr += ctx->args[i].ptr - 969 vma->vm_start; 970 mmap_read_unlock(current->mm); 971 972 pg_start = (ctx->args[i].ptr & PAGE_MASK) >> PAGE_SHIFT; 973 pg_end = ((ctx->args[i].ptr + len - 1) & PAGE_MASK) >> 974 PAGE_SHIFT; 975 pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; 976 977 } else { 978 979 if (ctx->olaps[oix].offset == 0) { 980 rlen -= ALIGN(args, FASTRPC_ALIGN) - args; 981 args = ALIGN(args, FASTRPC_ALIGN); 982 } 983 984 mlen = ctx->olaps[oix].mend - ctx->olaps[oix].mstart; 985 986 if (rlen < mlen) 987 goto bail; 988 989 rpra[i].buf.pv = args - ctx->olaps[oix].offset; 990 pages[i].addr = ctx->buf->phys - 991 ctx->olaps[oix].offset + 992 (pkt_size - rlen); 993 pages[i].addr = pages[i].addr & PAGE_MASK; 994 995 pg_start = (args & PAGE_MASK) >> PAGE_SHIFT; 996 pg_end = ((args + len - 1) & PAGE_MASK) >> PAGE_SHIFT; 997 pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; 998 args = args + mlen; 999 rlen -= mlen; 1000 } 1001 1002 if (i < inbufs && !ctx->maps[i]) { 1003 void *dst = (void *)(uintptr_t)rpra[i].buf.pv; 1004 void *src = (void *)(uintptr_t)ctx->args[i].ptr; 1005 1006 if (!kernel) { 1007 if (copy_from_user(dst, (void __user *)src, 1008 len)) { 1009 err = -EFAULT; 1010 goto bail; 1011 } 1012 } else { 1013 memcpy(dst, src, len); 1014 } 1015 } 1016 } 1017 1018 for (i = ctx->nbufs; i < ctx->nscalars; ++i) { 1019 list[i].num = ctx->args[i].length ? 1 : 0; 1020 list[i].pgidx = i; 1021 if (ctx->maps[i]) { 1022 pages[i].addr = ctx->maps[i]->phys; 1023 pages[i].size = ctx->maps[i]->size; 1024 } 1025 rpra[i].dma.fd = ctx->args[i].fd; 1026 rpra[i].dma.len = ctx->args[i].length; 1027 rpra[i].dma.offset = (u64) ctx->args[i].ptr; 1028 } 1029 1030 bail: 1031 if (err) 1032 dev_err(dev, "Error: get invoke args failed:%d\n", err); 1033 1034 return err; 1035 } 1036 1037 static int fastrpc_put_args(struct fastrpc_invoke_ctx *ctx, 1038 u32 kernel) 1039 { 1040 union fastrpc_remote_arg *rpra = ctx->rpra; 1041 struct fastrpc_user *fl = ctx->fl; 1042 struct fastrpc_map *mmap = NULL; 1043 struct fastrpc_invoke_buf *list; 1044 struct fastrpc_phy_page *pages; 1045 u64 *fdlist; 1046 int i, inbufs, outbufs, handles; 1047 1048 inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); 1049 outbufs = REMOTE_SCALARS_OUTBUFS(ctx->sc); 1050 handles = REMOTE_SCALARS_INHANDLES(ctx->sc) + REMOTE_SCALARS_OUTHANDLES(ctx->sc); 1051 list = fastrpc_invoke_buf_start(rpra, ctx->nscalars); 1052 pages = fastrpc_phy_page_start(list, ctx->nscalars); 1053 fdlist = (uint64_t *)(pages + inbufs + outbufs + handles); 1054 1055 for (i = inbufs; i < ctx->nbufs; ++i) { 1056 if (!ctx->maps[i]) { 1057 void *src = (void *)(uintptr_t)rpra[i].buf.pv; 1058 void *dst = (void *)(uintptr_t)ctx->args[i].ptr; 1059 u64 len = rpra[i].buf.len; 1060 1061 if (!kernel) { 1062 if (copy_to_user((void __user *)dst, src, len)) 1063 return -EFAULT; 1064 } else { 1065 memcpy(dst, src, len); 1066 } 1067 } 1068 } 1069 1070 for (i = 0; i < FASTRPC_MAX_FDLIST; i++) { 1071 if (!fdlist[i]) 1072 break; 1073 if (!fastrpc_map_lookup(fl, (int)fdlist[i], &mmap)) 1074 fastrpc_map_put(mmap); 1075 } 1076 1077 return 0; 1078 } 1079 1080 static int fastrpc_invoke_send(struct fastrpc_session_ctx *sctx, 1081 struct fastrpc_invoke_ctx *ctx, 1082 u32 kernel, uint32_t handle) 1083 { 1084 struct fastrpc_channel_ctx *cctx; 1085 struct fastrpc_user *fl = ctx->fl; 1086 struct fastrpc_msg *msg = &ctx->msg; 1087 int ret; 1088 1089 cctx = fl->cctx; 1090 msg->pid = fl->tgid; 1091 msg->tid = current->pid; 1092 1093 if (kernel) 1094 msg->pid = 0; 1095 1096 msg->ctx = ctx->ctxid | fl->pd; 1097 msg->handle = handle; 1098 msg->sc = ctx->sc; 1099 msg->addr = ctx->buf ? ctx->buf->phys : 0; 1100 msg->size = roundup(ctx->msg_sz, PAGE_SIZE); 1101 fastrpc_context_get(ctx); 1102 1103 ret = rpmsg_send(cctx->rpdev->ept, (void *)msg, sizeof(*msg)); 1104 1105 if (ret) 1106 fastrpc_context_put(ctx); 1107 1108 return ret; 1109 1110 } 1111 1112 static int fastrpc_internal_invoke(struct fastrpc_user *fl, u32 kernel, 1113 u32 handle, u32 sc, 1114 struct fastrpc_invoke_args *args) 1115 { 1116 struct fastrpc_invoke_ctx *ctx = NULL; 1117 struct fastrpc_buf *buf, *b; 1118 1119 int err = 0; 1120 1121 if (!fl->sctx) 1122 return -EINVAL; 1123 1124 if (!fl->cctx->rpdev) 1125 return -EPIPE; 1126 1127 if (handle == FASTRPC_INIT_HANDLE && !kernel) { 1128 dev_warn_ratelimited(fl->sctx->dev, "user app trying to send a kernel RPC message (%d)\n", handle); 1129 return -EPERM; 1130 } 1131 1132 ctx = fastrpc_context_alloc(fl, kernel, sc, args); 1133 if (IS_ERR(ctx)) 1134 return PTR_ERR(ctx); 1135 1136 if (ctx->nscalars) { 1137 err = fastrpc_get_args(kernel, ctx); 1138 if (err) 1139 goto bail; 1140 } 1141 1142 /* make sure that all CPU memory writes are seen by DSP */ 1143 dma_wmb(); 1144 /* Send invoke buffer to remote dsp */ 1145 err = fastrpc_invoke_send(fl->sctx, ctx, kernel, handle); 1146 if (err) 1147 goto bail; 1148 1149 if (kernel) { 1150 if (!wait_for_completion_timeout(&ctx->work, 10 * HZ)) 1151 err = -ETIMEDOUT; 1152 } else { 1153 err = wait_for_completion_interruptible(&ctx->work); 1154 } 1155 1156 if (err) 1157 goto bail; 1158 1159 /* Check the response from remote dsp */ 1160 err = ctx->retval; 1161 if (err) 1162 goto bail; 1163 1164 if (ctx->nscalars) { 1165 /* make sure that all memory writes by DSP are seen by CPU */ 1166 dma_rmb(); 1167 /* populate all the output buffers with results */ 1168 err = fastrpc_put_args(ctx, kernel); 1169 if (err) 1170 goto bail; 1171 } 1172 1173 bail: 1174 if (err != -ERESTARTSYS && err != -ETIMEDOUT) { 1175 /* We are done with this compute context */ 1176 spin_lock(&fl->lock); 1177 list_del(&ctx->node); 1178 spin_unlock(&fl->lock); 1179 fastrpc_context_put(ctx); 1180 } 1181 1182 if (err == -ERESTARTSYS) { 1183 list_for_each_entry_safe(buf, b, &fl->mmaps, node) { 1184 list_del(&buf->node); 1185 list_add_tail(&buf->node, &fl->cctx->invoke_interrupted_mmaps); 1186 } 1187 } 1188 1189 if (err) 1190 dev_dbg(fl->sctx->dev, "Error: Invoke Failed %d\n", err); 1191 1192 return err; 1193 } 1194 1195 static bool is_session_rejected(struct fastrpc_user *fl, bool unsigned_pd_request) 1196 { 1197 /* Check if the device node is non-secure and channel is secure*/ 1198 if (!fl->is_secure_dev && fl->cctx->secure) { 1199 /* 1200 * Allow untrusted applications to offload only to Unsigned PD when 1201 * channel is configured as secure and block untrusted apps on channel 1202 * that does not support unsigned PD offload 1203 */ 1204 if (!fl->cctx->unsigned_support || !unsigned_pd_request) { 1205 dev_err(&fl->cctx->rpdev->dev, "Error: Untrusted application trying to offload to signed PD"); 1206 return true; 1207 } 1208 } 1209 1210 return false; 1211 } 1212 1213 static int fastrpc_init_create_static_process(struct fastrpc_user *fl, 1214 char __user *argp) 1215 { 1216 struct fastrpc_init_create_static init; 1217 struct fastrpc_invoke_args *args; 1218 struct fastrpc_phy_page pages[1]; 1219 char *name; 1220 int err; 1221 struct { 1222 int pgid; 1223 u32 namelen; 1224 u32 pageslen; 1225 } inbuf; 1226 u32 sc; 1227 1228 args = kcalloc(FASTRPC_CREATE_STATIC_PROCESS_NARGS, sizeof(*args), GFP_KERNEL); 1229 if (!args) 1230 return -ENOMEM; 1231 1232 if (copy_from_user(&init, argp, sizeof(init))) { 1233 err = -EFAULT; 1234 goto err; 1235 } 1236 1237 if (init.namelen > INIT_FILE_NAMELEN_MAX) { 1238 err = -EINVAL; 1239 goto err; 1240 } 1241 1242 name = kzalloc(init.namelen, GFP_KERNEL); 1243 if (!name) { 1244 err = -ENOMEM; 1245 goto err; 1246 } 1247 1248 if (copy_from_user(name, (void __user *)(uintptr_t)init.name, init.namelen)) { 1249 err = -EFAULT; 1250 goto err_name; 1251 } 1252 1253 if (!fl->cctx->remote_heap) { 1254 err = fastrpc_remote_heap_alloc(fl, fl->sctx->dev, init.memlen, 1255 &fl->cctx->remote_heap); 1256 if (err) 1257 goto err_name; 1258 1259 /* Map if we have any heap VMIDs associated with this ADSP Static Process. */ 1260 if (fl->cctx->vmcount) { 1261 unsigned int perms = BIT(QCOM_SCM_VMID_HLOS); 1262 1263 err = qcom_scm_assign_mem(fl->cctx->remote_heap->phys, 1264 (u64)fl->cctx->remote_heap->size, &perms, 1265 fl->cctx->vmperms, fl->cctx->vmcount); 1266 if (err) { 1267 dev_err(fl->sctx->dev, "Failed to assign memory with phys 0x%llx size 0x%llx err %d", 1268 fl->cctx->remote_heap->phys, fl->cctx->remote_heap->size, err); 1269 goto err_map; 1270 } 1271 } 1272 } 1273 1274 inbuf.pgid = fl->tgid; 1275 inbuf.namelen = init.namelen; 1276 inbuf.pageslen = 0; 1277 fl->pd = USER_PD; 1278 1279 args[0].ptr = (u64)(uintptr_t)&inbuf; 1280 args[0].length = sizeof(inbuf); 1281 args[0].fd = -1; 1282 1283 args[1].ptr = (u64)(uintptr_t)name; 1284 args[1].length = inbuf.namelen; 1285 args[1].fd = -1; 1286 1287 pages[0].addr = fl->cctx->remote_heap->phys; 1288 pages[0].size = fl->cctx->remote_heap->size; 1289 1290 args[2].ptr = (u64)(uintptr_t) pages; 1291 args[2].length = sizeof(*pages); 1292 args[2].fd = -1; 1293 1294 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE_STATIC, 3, 0); 1295 1296 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1297 sc, args); 1298 if (err) 1299 goto err_invoke; 1300 1301 kfree(args); 1302 1303 return 0; 1304 err_invoke: 1305 if (fl->cctx->vmcount) { 1306 struct qcom_scm_vmperm perm; 1307 1308 perm.vmid = QCOM_SCM_VMID_HLOS; 1309 perm.perm = QCOM_SCM_PERM_RWX; 1310 err = qcom_scm_assign_mem(fl->cctx->remote_heap->phys, 1311 (u64)fl->cctx->remote_heap->size, 1312 &(fl->cctx->vmperms[0].vmid), &perm, 1); 1313 if (err) 1314 dev_err(fl->sctx->dev, "Failed to assign memory phys 0x%llx size 0x%llx err %d", 1315 fl->cctx->remote_heap->phys, fl->cctx->remote_heap->size, err); 1316 } 1317 err_map: 1318 fastrpc_buf_free(fl->cctx->remote_heap); 1319 err_name: 1320 kfree(name); 1321 err: 1322 kfree(args); 1323 1324 return err; 1325 } 1326 1327 static int fastrpc_init_create_process(struct fastrpc_user *fl, 1328 char __user *argp) 1329 { 1330 struct fastrpc_init_create init; 1331 struct fastrpc_invoke_args *args; 1332 struct fastrpc_phy_page pages[1]; 1333 struct fastrpc_map *map = NULL; 1334 struct fastrpc_buf *imem = NULL; 1335 int memlen; 1336 int err; 1337 struct { 1338 int pgid; 1339 u32 namelen; 1340 u32 filelen; 1341 u32 pageslen; 1342 u32 attrs; 1343 u32 siglen; 1344 } inbuf; 1345 u32 sc; 1346 bool unsigned_module = false; 1347 1348 args = kcalloc(FASTRPC_CREATE_PROCESS_NARGS, sizeof(*args), GFP_KERNEL); 1349 if (!args) 1350 return -ENOMEM; 1351 1352 if (copy_from_user(&init, argp, sizeof(init))) { 1353 err = -EFAULT; 1354 goto err; 1355 } 1356 1357 if (init.attrs & FASTRPC_MODE_UNSIGNED_MODULE) 1358 unsigned_module = true; 1359 1360 if (is_session_rejected(fl, unsigned_module)) { 1361 err = -ECONNREFUSED; 1362 goto err; 1363 } 1364 1365 if (init.filelen > INIT_FILELEN_MAX) { 1366 err = -EINVAL; 1367 goto err; 1368 } 1369 1370 inbuf.pgid = fl->tgid; 1371 inbuf.namelen = strlen(current->comm) + 1; 1372 inbuf.filelen = init.filelen; 1373 inbuf.pageslen = 1; 1374 inbuf.attrs = init.attrs; 1375 inbuf.siglen = init.siglen; 1376 fl->pd = USER_PD; 1377 1378 if (init.filelen && init.filefd) { 1379 err = fastrpc_map_create(fl, init.filefd, init.filelen, 0, &map); 1380 if (err) 1381 goto err; 1382 } 1383 1384 memlen = ALIGN(max(INIT_FILELEN_MAX, (int)init.filelen * 4), 1385 1024 * 1024); 1386 err = fastrpc_buf_alloc(fl, fl->sctx->dev, memlen, 1387 &imem); 1388 if (err) 1389 goto err_alloc; 1390 1391 fl->init_mem = imem; 1392 args[0].ptr = (u64)(uintptr_t)&inbuf; 1393 args[0].length = sizeof(inbuf); 1394 args[0].fd = -1; 1395 1396 args[1].ptr = (u64)(uintptr_t)current->comm; 1397 args[1].length = inbuf.namelen; 1398 args[1].fd = -1; 1399 1400 args[2].ptr = (u64) init.file; 1401 args[2].length = inbuf.filelen; 1402 args[2].fd = init.filefd; 1403 1404 pages[0].addr = imem->phys; 1405 pages[0].size = imem->size; 1406 1407 args[3].ptr = (u64)(uintptr_t) pages; 1408 args[3].length = 1 * sizeof(*pages); 1409 args[3].fd = -1; 1410 1411 args[4].ptr = (u64)(uintptr_t)&inbuf.attrs; 1412 args[4].length = sizeof(inbuf.attrs); 1413 args[4].fd = -1; 1414 1415 args[5].ptr = (u64)(uintptr_t) &inbuf.siglen; 1416 args[5].length = sizeof(inbuf.siglen); 1417 args[5].fd = -1; 1418 1419 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE, 4, 0); 1420 if (init.attrs) 1421 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE_ATTR, 6, 0); 1422 1423 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1424 sc, args); 1425 if (err) 1426 goto err_invoke; 1427 1428 kfree(args); 1429 1430 return 0; 1431 1432 err_invoke: 1433 fl->init_mem = NULL; 1434 fastrpc_buf_free(imem); 1435 err_alloc: 1436 if (map) { 1437 spin_lock(&fl->lock); 1438 list_del(&map->node); 1439 spin_unlock(&fl->lock); 1440 fastrpc_map_put(map); 1441 } 1442 err: 1443 kfree(args); 1444 1445 return err; 1446 } 1447 1448 static struct fastrpc_session_ctx *fastrpc_session_alloc( 1449 struct fastrpc_channel_ctx *cctx) 1450 { 1451 struct fastrpc_session_ctx *session = NULL; 1452 unsigned long flags; 1453 int i; 1454 1455 spin_lock_irqsave(&cctx->lock, flags); 1456 for (i = 0; i < cctx->sesscount; i++) { 1457 if (!cctx->session[i].used && cctx->session[i].valid) { 1458 cctx->session[i].used = true; 1459 session = &cctx->session[i]; 1460 break; 1461 } 1462 } 1463 spin_unlock_irqrestore(&cctx->lock, flags); 1464 1465 return session; 1466 } 1467 1468 static void fastrpc_session_free(struct fastrpc_channel_ctx *cctx, 1469 struct fastrpc_session_ctx *session) 1470 { 1471 unsigned long flags; 1472 1473 spin_lock_irqsave(&cctx->lock, flags); 1474 session->used = false; 1475 spin_unlock_irqrestore(&cctx->lock, flags); 1476 } 1477 1478 static int fastrpc_release_current_dsp_process(struct fastrpc_user *fl) 1479 { 1480 struct fastrpc_invoke_args args[1]; 1481 int tgid = 0; 1482 u32 sc; 1483 1484 tgid = fl->tgid; 1485 args[0].ptr = (u64)(uintptr_t) &tgid; 1486 args[0].length = sizeof(tgid); 1487 args[0].fd = -1; 1488 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_RELEASE, 1, 0); 1489 1490 return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1491 sc, &args[0]); 1492 } 1493 1494 static int fastrpc_device_release(struct inode *inode, struct file *file) 1495 { 1496 struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; 1497 struct fastrpc_channel_ctx *cctx = fl->cctx; 1498 struct fastrpc_invoke_ctx *ctx, *n; 1499 struct fastrpc_map *map, *m; 1500 struct fastrpc_buf *buf, *b; 1501 unsigned long flags; 1502 1503 fastrpc_release_current_dsp_process(fl); 1504 1505 spin_lock_irqsave(&cctx->lock, flags); 1506 list_del(&fl->user); 1507 spin_unlock_irqrestore(&cctx->lock, flags); 1508 1509 if (fl->init_mem) 1510 fastrpc_buf_free(fl->init_mem); 1511 1512 list_for_each_entry_safe(ctx, n, &fl->pending, node) { 1513 list_del(&ctx->node); 1514 fastrpc_context_put(ctx); 1515 } 1516 1517 list_for_each_entry_safe(map, m, &fl->maps, node) { 1518 list_del(&map->node); 1519 fastrpc_map_put(map); 1520 } 1521 1522 list_for_each_entry_safe(buf, b, &fl->mmaps, node) { 1523 list_del(&buf->node); 1524 fastrpc_buf_free(buf); 1525 } 1526 1527 fastrpc_session_free(cctx, fl->sctx); 1528 fastrpc_channel_ctx_put(cctx); 1529 1530 mutex_destroy(&fl->mutex); 1531 kfree(fl); 1532 file->private_data = NULL; 1533 1534 return 0; 1535 } 1536 1537 static int fastrpc_device_open(struct inode *inode, struct file *filp) 1538 { 1539 struct fastrpc_channel_ctx *cctx; 1540 struct fastrpc_device *fdevice; 1541 struct fastrpc_user *fl = NULL; 1542 unsigned long flags; 1543 1544 fdevice = miscdev_to_fdevice(filp->private_data); 1545 cctx = fdevice->cctx; 1546 1547 fl = kzalloc(sizeof(*fl), GFP_KERNEL); 1548 if (!fl) 1549 return -ENOMEM; 1550 1551 /* Released in fastrpc_device_release() */ 1552 fastrpc_channel_ctx_get(cctx); 1553 1554 filp->private_data = fl; 1555 spin_lock_init(&fl->lock); 1556 mutex_init(&fl->mutex); 1557 INIT_LIST_HEAD(&fl->pending); 1558 INIT_LIST_HEAD(&fl->maps); 1559 INIT_LIST_HEAD(&fl->mmaps); 1560 INIT_LIST_HEAD(&fl->user); 1561 fl->tgid = current->tgid; 1562 fl->cctx = cctx; 1563 fl->is_secure_dev = fdevice->secure; 1564 1565 fl->sctx = fastrpc_session_alloc(cctx); 1566 if (!fl->sctx) { 1567 dev_err(&cctx->rpdev->dev, "No session available\n"); 1568 mutex_destroy(&fl->mutex); 1569 kfree(fl); 1570 1571 return -EBUSY; 1572 } 1573 1574 spin_lock_irqsave(&cctx->lock, flags); 1575 list_add_tail(&fl->user, &cctx->users); 1576 spin_unlock_irqrestore(&cctx->lock, flags); 1577 1578 return 0; 1579 } 1580 1581 static int fastrpc_dmabuf_alloc(struct fastrpc_user *fl, char __user *argp) 1582 { 1583 struct fastrpc_alloc_dma_buf bp; 1584 DEFINE_DMA_BUF_EXPORT_INFO(exp_info); 1585 struct fastrpc_buf *buf = NULL; 1586 int err; 1587 1588 if (copy_from_user(&bp, argp, sizeof(bp))) 1589 return -EFAULT; 1590 1591 err = fastrpc_buf_alloc(fl, fl->sctx->dev, bp.size, &buf); 1592 if (err) 1593 return err; 1594 exp_info.ops = &fastrpc_dma_buf_ops; 1595 exp_info.size = bp.size; 1596 exp_info.flags = O_RDWR; 1597 exp_info.priv = buf; 1598 buf->dmabuf = dma_buf_export(&exp_info); 1599 if (IS_ERR(buf->dmabuf)) { 1600 err = PTR_ERR(buf->dmabuf); 1601 fastrpc_buf_free(buf); 1602 return err; 1603 } 1604 1605 bp.fd = dma_buf_fd(buf->dmabuf, O_ACCMODE); 1606 if (bp.fd < 0) { 1607 dma_buf_put(buf->dmabuf); 1608 return -EINVAL; 1609 } 1610 1611 if (copy_to_user(argp, &bp, sizeof(bp))) { 1612 /* 1613 * The usercopy failed, but we can't do much about it, as 1614 * dma_buf_fd() already called fd_install() and made the 1615 * file descriptor accessible for the current process. It 1616 * might already be closed and dmabuf no longer valid when 1617 * we reach this point. Therefore "leak" the fd and rely on 1618 * the process exit path to do any required cleanup. 1619 */ 1620 return -EFAULT; 1621 } 1622 1623 return 0; 1624 } 1625 1626 static int fastrpc_init_attach(struct fastrpc_user *fl, int pd) 1627 { 1628 struct fastrpc_invoke_args args[1]; 1629 int tgid = fl->tgid; 1630 u32 sc; 1631 1632 args[0].ptr = (u64)(uintptr_t) &tgid; 1633 args[0].length = sizeof(tgid); 1634 args[0].fd = -1; 1635 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_ATTACH, 1, 0); 1636 fl->pd = pd; 1637 1638 return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1639 sc, &args[0]); 1640 } 1641 1642 static int fastrpc_invoke(struct fastrpc_user *fl, char __user *argp) 1643 { 1644 struct fastrpc_invoke_args *args = NULL; 1645 struct fastrpc_invoke inv; 1646 u32 nscalars; 1647 int err; 1648 1649 if (copy_from_user(&inv, argp, sizeof(inv))) 1650 return -EFAULT; 1651 1652 /* nscalars is truncated here to max supported value */ 1653 nscalars = REMOTE_SCALARS_LENGTH(inv.sc); 1654 if (nscalars) { 1655 args = kcalloc(nscalars, sizeof(*args), GFP_KERNEL); 1656 if (!args) 1657 return -ENOMEM; 1658 1659 if (copy_from_user(args, (void __user *)(uintptr_t)inv.args, 1660 nscalars * sizeof(*args))) { 1661 kfree(args); 1662 return -EFAULT; 1663 } 1664 } 1665 1666 err = fastrpc_internal_invoke(fl, false, inv.handle, inv.sc, args); 1667 kfree(args); 1668 1669 return err; 1670 } 1671 1672 static int fastrpc_get_info_from_dsp(struct fastrpc_user *fl, uint32_t *dsp_attr_buf, 1673 uint32_t dsp_attr_buf_len) 1674 { 1675 struct fastrpc_invoke_args args[2] = { 0 }; 1676 1677 /* Capability filled in userspace */ 1678 dsp_attr_buf[0] = 0; 1679 1680 args[0].ptr = (u64)(uintptr_t)&dsp_attr_buf_len; 1681 args[0].length = sizeof(dsp_attr_buf_len); 1682 args[0].fd = -1; 1683 args[1].ptr = (u64)(uintptr_t)&dsp_attr_buf[1]; 1684 args[1].length = dsp_attr_buf_len; 1685 args[1].fd = -1; 1686 fl->pd = USER_PD; 1687 1688 return fastrpc_internal_invoke(fl, true, FASTRPC_DSP_UTILITIES_HANDLE, 1689 FASTRPC_SCALARS(0, 1, 1), args); 1690 } 1691 1692 static int fastrpc_get_info_from_kernel(struct fastrpc_ioctl_capability *cap, 1693 struct fastrpc_user *fl) 1694 { 1695 struct fastrpc_channel_ctx *cctx = fl->cctx; 1696 uint32_t attribute_id = cap->attribute_id; 1697 uint32_t *dsp_attributes; 1698 unsigned long flags; 1699 uint32_t domain = cap->domain; 1700 int err; 1701 1702 spin_lock_irqsave(&cctx->lock, flags); 1703 /* check if we already have queried dsp for attributes */ 1704 if (cctx->valid_attributes) { 1705 spin_unlock_irqrestore(&cctx->lock, flags); 1706 goto done; 1707 } 1708 spin_unlock_irqrestore(&cctx->lock, flags); 1709 1710 dsp_attributes = kzalloc(FASTRPC_MAX_DSP_ATTRIBUTES_LEN, GFP_KERNEL); 1711 if (!dsp_attributes) 1712 return -ENOMEM; 1713 1714 err = fastrpc_get_info_from_dsp(fl, dsp_attributes, FASTRPC_MAX_DSP_ATTRIBUTES_LEN); 1715 if (err == DSP_UNSUPPORTED_API) { 1716 dev_info(&cctx->rpdev->dev, 1717 "Warning: DSP capabilities not supported on domain: %d\n", domain); 1718 kfree(dsp_attributes); 1719 return -EOPNOTSUPP; 1720 } else if (err) { 1721 dev_err(&cctx->rpdev->dev, "Error: dsp information is incorrect err: %d\n", err); 1722 kfree(dsp_attributes); 1723 return err; 1724 } 1725 1726 spin_lock_irqsave(&cctx->lock, flags); 1727 memcpy(cctx->dsp_attributes, dsp_attributes, FASTRPC_MAX_DSP_ATTRIBUTES_LEN); 1728 cctx->valid_attributes = true; 1729 spin_unlock_irqrestore(&cctx->lock, flags); 1730 kfree(dsp_attributes); 1731 done: 1732 cap->capability = cctx->dsp_attributes[attribute_id]; 1733 return 0; 1734 } 1735 1736 static int fastrpc_get_dsp_info(struct fastrpc_user *fl, char __user *argp) 1737 { 1738 struct fastrpc_ioctl_capability cap = {0}; 1739 int err = 0; 1740 1741 if (copy_from_user(&cap, argp, sizeof(cap))) 1742 return -EFAULT; 1743 1744 cap.capability = 0; 1745 if (cap.domain >= FASTRPC_DEV_MAX) { 1746 dev_err(&fl->cctx->rpdev->dev, "Error: Invalid domain id:%d, err:%d\n", 1747 cap.domain, err); 1748 return -ECHRNG; 1749 } 1750 1751 /* Fastrpc Capablities does not support modem domain */ 1752 if (cap.domain == MDSP_DOMAIN_ID) { 1753 dev_err(&fl->cctx->rpdev->dev, "Error: modem not supported %d\n", err); 1754 return -ECHRNG; 1755 } 1756 1757 if (cap.attribute_id >= FASTRPC_MAX_DSP_ATTRIBUTES) { 1758 dev_err(&fl->cctx->rpdev->dev, "Error: invalid attribute: %d, err: %d\n", 1759 cap.attribute_id, err); 1760 return -EOVERFLOW; 1761 } 1762 1763 err = fastrpc_get_info_from_kernel(&cap, fl); 1764 if (err) 1765 return err; 1766 1767 if (copy_to_user(argp, &cap.capability, sizeof(cap.capability))) 1768 return -EFAULT; 1769 1770 return 0; 1771 } 1772 1773 static int fastrpc_req_munmap_impl(struct fastrpc_user *fl, struct fastrpc_buf *buf) 1774 { 1775 struct fastrpc_invoke_args args[1] = { [0] = { 0 } }; 1776 struct fastrpc_munmap_req_msg req_msg; 1777 struct device *dev = fl->sctx->dev; 1778 int err; 1779 u32 sc; 1780 1781 req_msg.pgid = fl->tgid; 1782 req_msg.size = buf->size; 1783 req_msg.vaddr = buf->raddr; 1784 1785 args[0].ptr = (u64) (uintptr_t) &req_msg; 1786 args[0].length = sizeof(req_msg); 1787 1788 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MUNMAP, 1, 0); 1789 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, 1790 &args[0]); 1791 if (!err) { 1792 dev_dbg(dev, "unmmap\tpt 0x%09lx OK\n", buf->raddr); 1793 spin_lock(&fl->lock); 1794 list_del(&buf->node); 1795 spin_unlock(&fl->lock); 1796 fastrpc_buf_free(buf); 1797 } else { 1798 dev_err(dev, "unmmap\tpt 0x%09lx ERROR\n", buf->raddr); 1799 } 1800 1801 return err; 1802 } 1803 1804 static int fastrpc_req_munmap(struct fastrpc_user *fl, char __user *argp) 1805 { 1806 struct fastrpc_buf *buf = NULL, *iter, *b; 1807 struct fastrpc_req_munmap req; 1808 struct device *dev = fl->sctx->dev; 1809 1810 if (copy_from_user(&req, argp, sizeof(req))) 1811 return -EFAULT; 1812 1813 spin_lock(&fl->lock); 1814 list_for_each_entry_safe(iter, b, &fl->mmaps, node) { 1815 if ((iter->raddr == req.vaddrout) && (iter->size == req.size)) { 1816 buf = iter; 1817 break; 1818 } 1819 } 1820 spin_unlock(&fl->lock); 1821 1822 if (!buf) { 1823 dev_err(dev, "mmap\t\tpt 0x%09llx [len 0x%08llx] not in list\n", 1824 req.vaddrout, req.size); 1825 return -EINVAL; 1826 } 1827 1828 return fastrpc_req_munmap_impl(fl, buf); 1829 } 1830 1831 static int fastrpc_req_mmap(struct fastrpc_user *fl, char __user *argp) 1832 { 1833 struct fastrpc_invoke_args args[3] = { [0 ... 2] = { 0 } }; 1834 struct fastrpc_buf *buf = NULL; 1835 struct fastrpc_mmap_req_msg req_msg; 1836 struct fastrpc_mmap_rsp_msg rsp_msg; 1837 struct fastrpc_phy_page pages; 1838 struct fastrpc_req_mmap req; 1839 struct device *dev = fl->sctx->dev; 1840 int err; 1841 u32 sc; 1842 1843 if (copy_from_user(&req, argp, sizeof(req))) 1844 return -EFAULT; 1845 1846 if (req.flags != ADSP_MMAP_ADD_PAGES && req.flags != ADSP_MMAP_REMOTE_HEAP_ADDR) { 1847 dev_err(dev, "flag not supported 0x%x\n", req.flags); 1848 1849 return -EINVAL; 1850 } 1851 1852 if (req.vaddrin) { 1853 dev_err(dev, "adding user allocated pages is not supported\n"); 1854 return -EINVAL; 1855 } 1856 1857 err = fastrpc_buf_alloc(fl, fl->sctx->dev, req.size, &buf); 1858 if (err) { 1859 dev_err(dev, "failed to allocate buffer\n"); 1860 return err; 1861 } 1862 1863 req_msg.pgid = fl->tgid; 1864 req_msg.flags = req.flags; 1865 req_msg.vaddr = req.vaddrin; 1866 req_msg.num = sizeof(pages); 1867 1868 args[0].ptr = (u64) (uintptr_t) &req_msg; 1869 args[0].length = sizeof(req_msg); 1870 1871 pages.addr = buf->phys; 1872 pages.size = buf->size; 1873 1874 args[1].ptr = (u64) (uintptr_t) &pages; 1875 args[1].length = sizeof(pages); 1876 1877 args[2].ptr = (u64) (uintptr_t) &rsp_msg; 1878 args[2].length = sizeof(rsp_msg); 1879 1880 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MMAP, 2, 1); 1881 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, 1882 &args[0]); 1883 if (err) { 1884 dev_err(dev, "mmap error (len 0x%08llx)\n", buf->size); 1885 goto err_invoke; 1886 } 1887 1888 /* update the buffer to be able to deallocate the memory on the DSP */ 1889 buf->raddr = (uintptr_t) rsp_msg.vaddr; 1890 1891 /* let the client know the address to use */ 1892 req.vaddrout = rsp_msg.vaddr; 1893 1894 /* Add memory to static PD pool, protection thru hypervisor */ 1895 if (req.flags != ADSP_MMAP_REMOTE_HEAP_ADDR && fl->cctx->vmcount) { 1896 struct qcom_scm_vmperm perm; 1897 int err = 0; 1898 1899 perm.vmid = QCOM_SCM_VMID_HLOS; 1900 perm.perm = QCOM_SCM_PERM_RWX; 1901 err = qcom_scm_assign_mem(buf->phys, buf->size, 1902 &(fl->cctx->vmperms[0].vmid), &perm, 1); 1903 if (err) { 1904 dev_err(fl->sctx->dev, "Failed to assign memory phys 0x%llx size 0x%llx err %d", 1905 buf->phys, buf->size, err); 1906 goto err_assign; 1907 } 1908 } 1909 1910 spin_lock(&fl->lock); 1911 list_add_tail(&buf->node, &fl->mmaps); 1912 spin_unlock(&fl->lock); 1913 1914 if (copy_to_user((void __user *)argp, &req, sizeof(req))) { 1915 err = -EFAULT; 1916 goto err_assign; 1917 } 1918 1919 dev_dbg(dev, "mmap\t\tpt 0x%09lx OK [len 0x%08llx]\n", 1920 buf->raddr, buf->size); 1921 1922 return 0; 1923 1924 err_assign: 1925 fastrpc_req_munmap_impl(fl, buf); 1926 err_invoke: 1927 fastrpc_buf_free(buf); 1928 1929 return err; 1930 } 1931 1932 static int fastrpc_req_mem_unmap_impl(struct fastrpc_user *fl, struct fastrpc_mem_unmap *req) 1933 { 1934 struct fastrpc_invoke_args args[1] = { [0] = { 0 } }; 1935 struct fastrpc_map *map = NULL, *iter, *m; 1936 struct fastrpc_mem_unmap_req_msg req_msg = { 0 }; 1937 int err = 0; 1938 u32 sc; 1939 struct device *dev = fl->sctx->dev; 1940 1941 spin_lock(&fl->lock); 1942 list_for_each_entry_safe(iter, m, &fl->maps, node) { 1943 if ((req->fd < 0 || iter->fd == req->fd) && (iter->raddr == req->vaddr)) { 1944 map = iter; 1945 break; 1946 } 1947 } 1948 1949 spin_unlock(&fl->lock); 1950 1951 if (!map) { 1952 dev_err(dev, "map not in list\n"); 1953 return -EINVAL; 1954 } 1955 1956 req_msg.pgid = fl->tgid; 1957 req_msg.len = map->len; 1958 req_msg.vaddrin = map->raddr; 1959 req_msg.fd = map->fd; 1960 1961 args[0].ptr = (u64) (uintptr_t) &req_msg; 1962 args[0].length = sizeof(req_msg); 1963 1964 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MEM_UNMAP, 1, 0); 1965 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, 1966 &args[0]); 1967 fastrpc_map_put(map); 1968 if (err) 1969 dev_err(dev, "unmmap\tpt fd = %d, 0x%09llx error\n", map->fd, map->raddr); 1970 1971 return err; 1972 } 1973 1974 static int fastrpc_req_mem_unmap(struct fastrpc_user *fl, char __user *argp) 1975 { 1976 struct fastrpc_mem_unmap req; 1977 1978 if (copy_from_user(&req, argp, sizeof(req))) 1979 return -EFAULT; 1980 1981 return fastrpc_req_mem_unmap_impl(fl, &req); 1982 } 1983 1984 static int fastrpc_req_mem_map(struct fastrpc_user *fl, char __user *argp) 1985 { 1986 struct fastrpc_invoke_args args[4] = { [0 ... 3] = { 0 } }; 1987 struct fastrpc_mem_map_req_msg req_msg = { 0 }; 1988 struct fastrpc_mmap_rsp_msg rsp_msg = { 0 }; 1989 struct fastrpc_mem_unmap req_unmap = { 0 }; 1990 struct fastrpc_phy_page pages = { 0 }; 1991 struct fastrpc_mem_map req; 1992 struct device *dev = fl->sctx->dev; 1993 struct fastrpc_map *map = NULL; 1994 int err; 1995 u32 sc; 1996 1997 if (copy_from_user(&req, argp, sizeof(req))) 1998 return -EFAULT; 1999 2000 /* create SMMU mapping */ 2001 err = fastrpc_map_create(fl, req.fd, req.length, 0, &map); 2002 if (err) { 2003 dev_err(dev, "failed to map buffer, fd = %d\n", req.fd); 2004 return err; 2005 } 2006 2007 req_msg.pgid = fl->tgid; 2008 req_msg.fd = req.fd; 2009 req_msg.offset = req.offset; 2010 req_msg.vaddrin = req.vaddrin; 2011 map->va = (void *) (uintptr_t) req.vaddrin; 2012 req_msg.flags = req.flags; 2013 req_msg.num = sizeof(pages); 2014 req_msg.data_len = 0; 2015 2016 args[0].ptr = (u64) (uintptr_t) &req_msg; 2017 args[0].length = sizeof(req_msg); 2018 2019 pages.addr = map->phys; 2020 pages.size = map->size; 2021 2022 args[1].ptr = (u64) (uintptr_t) &pages; 2023 args[1].length = sizeof(pages); 2024 2025 args[2].ptr = (u64) (uintptr_t) &pages; 2026 args[2].length = 0; 2027 2028 args[3].ptr = (u64) (uintptr_t) &rsp_msg; 2029 args[3].length = sizeof(rsp_msg); 2030 2031 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MEM_MAP, 3, 1); 2032 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, &args[0]); 2033 if (err) { 2034 dev_err(dev, "mem mmap error, fd %d, vaddr %llx, size %lld\n", 2035 req.fd, req.vaddrin, map->size); 2036 goto err_invoke; 2037 } 2038 2039 /* update the buffer to be able to deallocate the memory on the DSP */ 2040 map->raddr = rsp_msg.vaddr; 2041 2042 /* let the client know the address to use */ 2043 req.vaddrout = rsp_msg.vaddr; 2044 2045 if (copy_to_user((void __user *)argp, &req, sizeof(req))) { 2046 /* unmap the memory and release the buffer */ 2047 req_unmap.vaddr = (uintptr_t) rsp_msg.vaddr; 2048 req_unmap.length = map->size; 2049 fastrpc_req_mem_unmap_impl(fl, &req_unmap); 2050 return -EFAULT; 2051 } 2052 2053 return 0; 2054 2055 err_invoke: 2056 fastrpc_map_put(map); 2057 2058 return err; 2059 } 2060 2061 static long fastrpc_device_ioctl(struct file *file, unsigned int cmd, 2062 unsigned long arg) 2063 { 2064 struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; 2065 char __user *argp = (char __user *)arg; 2066 int err; 2067 2068 switch (cmd) { 2069 case FASTRPC_IOCTL_INVOKE: 2070 err = fastrpc_invoke(fl, argp); 2071 break; 2072 case FASTRPC_IOCTL_INIT_ATTACH: 2073 err = fastrpc_init_attach(fl, ROOT_PD); 2074 break; 2075 case FASTRPC_IOCTL_INIT_ATTACH_SNS: 2076 err = fastrpc_init_attach(fl, SENSORS_PD); 2077 break; 2078 case FASTRPC_IOCTL_INIT_CREATE_STATIC: 2079 err = fastrpc_init_create_static_process(fl, argp); 2080 break; 2081 case FASTRPC_IOCTL_INIT_CREATE: 2082 err = fastrpc_init_create_process(fl, argp); 2083 break; 2084 case FASTRPC_IOCTL_ALLOC_DMA_BUFF: 2085 err = fastrpc_dmabuf_alloc(fl, argp); 2086 break; 2087 case FASTRPC_IOCTL_MMAP: 2088 err = fastrpc_req_mmap(fl, argp); 2089 break; 2090 case FASTRPC_IOCTL_MUNMAP: 2091 err = fastrpc_req_munmap(fl, argp); 2092 break; 2093 case FASTRPC_IOCTL_MEM_MAP: 2094 err = fastrpc_req_mem_map(fl, argp); 2095 break; 2096 case FASTRPC_IOCTL_MEM_UNMAP: 2097 err = fastrpc_req_mem_unmap(fl, argp); 2098 break; 2099 case FASTRPC_IOCTL_GET_DSP_INFO: 2100 err = fastrpc_get_dsp_info(fl, argp); 2101 break; 2102 default: 2103 err = -ENOTTY; 2104 break; 2105 } 2106 2107 return err; 2108 } 2109 2110 static const struct file_operations fastrpc_fops = { 2111 .open = fastrpc_device_open, 2112 .release = fastrpc_device_release, 2113 .unlocked_ioctl = fastrpc_device_ioctl, 2114 .compat_ioctl = fastrpc_device_ioctl, 2115 }; 2116 2117 static int fastrpc_cb_probe(struct platform_device *pdev) 2118 { 2119 struct fastrpc_channel_ctx *cctx; 2120 struct fastrpc_session_ctx *sess; 2121 struct device *dev = &pdev->dev; 2122 int i, sessions = 0; 2123 unsigned long flags; 2124 int rc; 2125 2126 cctx = dev_get_drvdata(dev->parent); 2127 if (!cctx) 2128 return -EINVAL; 2129 2130 of_property_read_u32(dev->of_node, "qcom,nsessions", &sessions); 2131 2132 spin_lock_irqsave(&cctx->lock, flags); 2133 if (cctx->sesscount >= FASTRPC_MAX_SESSIONS) { 2134 dev_err(&pdev->dev, "too many sessions\n"); 2135 spin_unlock_irqrestore(&cctx->lock, flags); 2136 return -ENOSPC; 2137 } 2138 sess = &cctx->session[cctx->sesscount++]; 2139 sess->used = false; 2140 sess->valid = true; 2141 sess->dev = dev; 2142 dev_set_drvdata(dev, sess); 2143 2144 if (of_property_read_u32(dev->of_node, "reg", &sess->sid)) 2145 dev_info(dev, "FastRPC Session ID not specified in DT\n"); 2146 2147 if (sessions > 0) { 2148 struct fastrpc_session_ctx *dup_sess; 2149 2150 for (i = 1; i < sessions; i++) { 2151 if (cctx->sesscount >= FASTRPC_MAX_SESSIONS) 2152 break; 2153 dup_sess = &cctx->session[cctx->sesscount++]; 2154 memcpy(dup_sess, sess, sizeof(*dup_sess)); 2155 } 2156 } 2157 spin_unlock_irqrestore(&cctx->lock, flags); 2158 rc = dma_set_mask(dev, DMA_BIT_MASK(32)); 2159 if (rc) { 2160 dev_err(dev, "32-bit DMA enable failed\n"); 2161 return rc; 2162 } 2163 2164 return 0; 2165 } 2166 2167 static int fastrpc_cb_remove(struct platform_device *pdev) 2168 { 2169 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(pdev->dev.parent); 2170 struct fastrpc_session_ctx *sess = dev_get_drvdata(&pdev->dev); 2171 unsigned long flags; 2172 int i; 2173 2174 spin_lock_irqsave(&cctx->lock, flags); 2175 for (i = 1; i < FASTRPC_MAX_SESSIONS; i++) { 2176 if (cctx->session[i].sid == sess->sid) { 2177 cctx->session[i].valid = false; 2178 cctx->sesscount--; 2179 } 2180 } 2181 spin_unlock_irqrestore(&cctx->lock, flags); 2182 2183 return 0; 2184 } 2185 2186 static const struct of_device_id fastrpc_match_table[] = { 2187 { .compatible = "qcom,fastrpc-compute-cb", }, 2188 {} 2189 }; 2190 2191 static struct platform_driver fastrpc_cb_driver = { 2192 .probe = fastrpc_cb_probe, 2193 .remove = fastrpc_cb_remove, 2194 .driver = { 2195 .name = "qcom,fastrpc-cb", 2196 .of_match_table = fastrpc_match_table, 2197 .suppress_bind_attrs = true, 2198 }, 2199 }; 2200 2201 static int fastrpc_device_register(struct device *dev, struct fastrpc_channel_ctx *cctx, 2202 bool is_secured, const char *domain) 2203 { 2204 struct fastrpc_device *fdev; 2205 int err; 2206 2207 fdev = devm_kzalloc(dev, sizeof(*fdev), GFP_KERNEL); 2208 if (!fdev) 2209 return -ENOMEM; 2210 2211 fdev->secure = is_secured; 2212 fdev->cctx = cctx; 2213 fdev->miscdev.minor = MISC_DYNAMIC_MINOR; 2214 fdev->miscdev.fops = &fastrpc_fops; 2215 fdev->miscdev.name = devm_kasprintf(dev, GFP_KERNEL, "fastrpc-%s%s", 2216 domain, is_secured ? "-secure" : ""); 2217 err = misc_register(&fdev->miscdev); 2218 if (!err) { 2219 if (is_secured) 2220 cctx->secure_fdevice = fdev; 2221 else 2222 cctx->fdevice = fdev; 2223 } 2224 2225 return err; 2226 } 2227 2228 static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev) 2229 { 2230 struct device *rdev = &rpdev->dev; 2231 struct fastrpc_channel_ctx *data; 2232 int i, err, domain_id = -1, vmcount; 2233 const char *domain; 2234 bool secure_dsp; 2235 unsigned int vmids[FASTRPC_MAX_VMIDS]; 2236 2237 err = of_property_read_string(rdev->of_node, "label", &domain); 2238 if (err) { 2239 dev_info(rdev, "FastRPC Domain not specified in DT\n"); 2240 return err; 2241 } 2242 2243 for (i = 0; i <= CDSP_DOMAIN_ID; i++) { 2244 if (!strcmp(domains[i], domain)) { 2245 domain_id = i; 2246 break; 2247 } 2248 } 2249 2250 if (domain_id < 0) { 2251 dev_info(rdev, "FastRPC Invalid Domain ID %d\n", domain_id); 2252 return -EINVAL; 2253 } 2254 2255 if (of_reserved_mem_device_init_by_idx(rdev, rdev->of_node, 0)) 2256 dev_info(rdev, "no reserved DMA memory for FASTRPC\n"); 2257 2258 vmcount = of_property_read_variable_u32_array(rdev->of_node, 2259 "qcom,vmids", &vmids[0], 0, FASTRPC_MAX_VMIDS); 2260 if (vmcount < 0) 2261 vmcount = 0; 2262 else if (!qcom_scm_is_available()) 2263 return -EPROBE_DEFER; 2264 2265 data = kzalloc(sizeof(*data), GFP_KERNEL); 2266 if (!data) 2267 return -ENOMEM; 2268 2269 if (vmcount) { 2270 data->vmcount = vmcount; 2271 data->perms = BIT(QCOM_SCM_VMID_HLOS); 2272 for (i = 0; i < data->vmcount; i++) { 2273 data->vmperms[i].vmid = vmids[i]; 2274 data->vmperms[i].perm = QCOM_SCM_PERM_RWX; 2275 } 2276 } 2277 2278 secure_dsp = !(of_property_read_bool(rdev->of_node, "qcom,non-secure-domain")); 2279 data->secure = secure_dsp; 2280 2281 switch (domain_id) { 2282 case ADSP_DOMAIN_ID: 2283 case MDSP_DOMAIN_ID: 2284 case SDSP_DOMAIN_ID: 2285 /* Unsigned PD offloading is only supported on CDSP*/ 2286 data->unsigned_support = false; 2287 err = fastrpc_device_register(rdev, data, secure_dsp, domains[domain_id]); 2288 if (err) 2289 goto fdev_error; 2290 break; 2291 case CDSP_DOMAIN_ID: 2292 data->unsigned_support = true; 2293 /* Create both device nodes so that we can allow both Signed and Unsigned PD */ 2294 err = fastrpc_device_register(rdev, data, true, domains[domain_id]); 2295 if (err) 2296 goto fdev_error; 2297 2298 err = fastrpc_device_register(rdev, data, false, domains[domain_id]); 2299 if (err) 2300 goto fdev_error; 2301 break; 2302 default: 2303 err = -EINVAL; 2304 goto fdev_error; 2305 } 2306 2307 kref_init(&data->refcount); 2308 2309 dev_set_drvdata(&rpdev->dev, data); 2310 rdev->dma_mask = &data->dma_mask; 2311 dma_set_mask_and_coherent(rdev, DMA_BIT_MASK(32)); 2312 INIT_LIST_HEAD(&data->users); 2313 INIT_LIST_HEAD(&data->invoke_interrupted_mmaps); 2314 spin_lock_init(&data->lock); 2315 idr_init(&data->ctx_idr); 2316 data->domain_id = domain_id; 2317 data->rpdev = rpdev; 2318 2319 return of_platform_populate(rdev->of_node, NULL, NULL, rdev); 2320 fdev_error: 2321 kfree(data); 2322 return err; 2323 } 2324 2325 static void fastrpc_notify_users(struct fastrpc_user *user) 2326 { 2327 struct fastrpc_invoke_ctx *ctx; 2328 2329 spin_lock(&user->lock); 2330 list_for_each_entry(ctx, &user->pending, node) 2331 complete(&ctx->work); 2332 spin_unlock(&user->lock); 2333 } 2334 2335 static void fastrpc_rpmsg_remove(struct rpmsg_device *rpdev) 2336 { 2337 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); 2338 struct fastrpc_buf *buf, *b; 2339 struct fastrpc_user *user; 2340 unsigned long flags; 2341 2342 spin_lock_irqsave(&cctx->lock, flags); 2343 list_for_each_entry(user, &cctx->users, user) 2344 fastrpc_notify_users(user); 2345 spin_unlock_irqrestore(&cctx->lock, flags); 2346 2347 if (cctx->fdevice) 2348 misc_deregister(&cctx->fdevice->miscdev); 2349 2350 if (cctx->secure_fdevice) 2351 misc_deregister(&cctx->secure_fdevice->miscdev); 2352 2353 list_for_each_entry_safe(buf, b, &cctx->invoke_interrupted_mmaps, node) 2354 list_del(&buf->node); 2355 2356 if (cctx->remote_heap) 2357 fastrpc_buf_free(cctx->remote_heap); 2358 2359 of_platform_depopulate(&rpdev->dev); 2360 2361 cctx->rpdev = NULL; 2362 fastrpc_channel_ctx_put(cctx); 2363 } 2364 2365 static int fastrpc_rpmsg_callback(struct rpmsg_device *rpdev, void *data, 2366 int len, void *priv, u32 addr) 2367 { 2368 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); 2369 struct fastrpc_invoke_rsp *rsp = data; 2370 struct fastrpc_invoke_ctx *ctx; 2371 unsigned long flags; 2372 unsigned long ctxid; 2373 2374 if (len < sizeof(*rsp)) 2375 return -EINVAL; 2376 2377 ctxid = ((rsp->ctx & FASTRPC_CTXID_MASK) >> 4); 2378 2379 spin_lock_irqsave(&cctx->lock, flags); 2380 ctx = idr_find(&cctx->ctx_idr, ctxid); 2381 spin_unlock_irqrestore(&cctx->lock, flags); 2382 2383 if (!ctx) { 2384 dev_err(&rpdev->dev, "No context ID matches response\n"); 2385 return -ENOENT; 2386 } 2387 2388 ctx->retval = rsp->retval; 2389 complete(&ctx->work); 2390 2391 /* 2392 * The DMA buffer associated with the context cannot be freed in 2393 * interrupt context so schedule it through a worker thread to 2394 * avoid a kernel BUG. 2395 */ 2396 schedule_work(&ctx->put_work); 2397 2398 return 0; 2399 } 2400 2401 static const struct of_device_id fastrpc_rpmsg_of_match[] = { 2402 { .compatible = "qcom,fastrpc" }, 2403 { }, 2404 }; 2405 MODULE_DEVICE_TABLE(of, fastrpc_rpmsg_of_match); 2406 2407 static struct rpmsg_driver fastrpc_driver = { 2408 .probe = fastrpc_rpmsg_probe, 2409 .remove = fastrpc_rpmsg_remove, 2410 .callback = fastrpc_rpmsg_callback, 2411 .drv = { 2412 .name = "qcom,fastrpc", 2413 .of_match_table = fastrpc_rpmsg_of_match, 2414 }, 2415 }; 2416 2417 static int fastrpc_init(void) 2418 { 2419 int ret; 2420 2421 ret = platform_driver_register(&fastrpc_cb_driver); 2422 if (ret < 0) { 2423 pr_err("fastrpc: failed to register cb driver\n"); 2424 return ret; 2425 } 2426 2427 ret = register_rpmsg_driver(&fastrpc_driver); 2428 if (ret < 0) { 2429 pr_err("fastrpc: failed to register rpmsg driver\n"); 2430 platform_driver_unregister(&fastrpc_cb_driver); 2431 return ret; 2432 } 2433 2434 return 0; 2435 } 2436 module_init(fastrpc_init); 2437 2438 static void fastrpc_exit(void) 2439 { 2440 platform_driver_unregister(&fastrpc_cb_driver); 2441 unregister_rpmsg_driver(&fastrpc_driver); 2442 } 2443 module_exit(fastrpc_exit); 2444 2445 MODULE_LICENSE("GPL v2"); 2446 MODULE_IMPORT_NS(DMA_BUF); 2447