1 // SPDX-License-Identifier: GPL-2.0 2 // Copyright (c) 2011-2018, The Linux Foundation. All rights reserved. 3 // Copyright (c) 2018, Linaro Limited 4 5 #include <linux/completion.h> 6 #include <linux/device.h> 7 #include <linux/dma-buf.h> 8 #include <linux/dma-mapping.h> 9 #include <linux/dma-resv.h> 10 #include <linux/idr.h> 11 #include <linux/list.h> 12 #include <linux/miscdevice.h> 13 #include <linux/module.h> 14 #include <linux/of_address.h> 15 #include <linux/of.h> 16 #include <linux/platform_device.h> 17 #include <linux/sort.h> 18 #include <linux/of_platform.h> 19 #include <linux/rpmsg.h> 20 #include <linux/scatterlist.h> 21 #include <linux/slab.h> 22 #include <linux/firmware/qcom/qcom_scm.h> 23 #include <uapi/misc/fastrpc.h> 24 #include <linux/of_reserved_mem.h> 25 26 #define ADSP_DOMAIN_ID (0) 27 #define MDSP_DOMAIN_ID (1) 28 #define SDSP_DOMAIN_ID (2) 29 #define CDSP_DOMAIN_ID (3) 30 #define FASTRPC_DEV_MAX 4 /* adsp, mdsp, slpi, cdsp*/ 31 #define FASTRPC_MAX_SESSIONS 14 32 #define FASTRPC_MAX_VMIDS 16 33 #define FASTRPC_ALIGN 128 34 #define FASTRPC_MAX_FDLIST 16 35 #define FASTRPC_MAX_CRCLIST 64 36 #define FASTRPC_PHYS(p) ((p) & 0xffffffff) 37 #define FASTRPC_CTX_MAX (256) 38 #define FASTRPC_INIT_HANDLE 1 39 #define FASTRPC_DSP_UTILITIES_HANDLE 2 40 #define FASTRPC_CTXID_MASK (0xFF0) 41 #define INIT_FILELEN_MAX (2 * 1024 * 1024) 42 #define INIT_FILE_NAMELEN_MAX (128) 43 #define FASTRPC_DEVICE_NAME "fastrpc" 44 45 /* Add memory to static PD pool, protection thru XPU */ 46 #define ADSP_MMAP_HEAP_ADDR 4 47 /* MAP static DMA buffer on DSP User PD */ 48 #define ADSP_MMAP_DMA_BUFFER 6 49 /* Add memory to static PD pool protection thru hypervisor */ 50 #define ADSP_MMAP_REMOTE_HEAP_ADDR 8 51 /* Add memory to userPD pool, for user heap */ 52 #define ADSP_MMAP_ADD_PAGES 0x1000 53 /* Add memory to userPD pool, for LLC heap */ 54 #define ADSP_MMAP_ADD_PAGES_LLC 0x3000, 55 56 #define DSP_UNSUPPORTED_API (0x80000414) 57 /* MAX NUMBER of DSP ATTRIBUTES SUPPORTED */ 58 #define FASTRPC_MAX_DSP_ATTRIBUTES (256) 59 #define FASTRPC_MAX_DSP_ATTRIBUTES_LEN (sizeof(u32) * FASTRPC_MAX_DSP_ATTRIBUTES) 60 61 /* Retrives number of input buffers from the scalars parameter */ 62 #define REMOTE_SCALARS_INBUFS(sc) (((sc) >> 16) & 0x0ff) 63 64 /* Retrives number of output buffers from the scalars parameter */ 65 #define REMOTE_SCALARS_OUTBUFS(sc) (((sc) >> 8) & 0x0ff) 66 67 /* Retrives number of input handles from the scalars parameter */ 68 #define REMOTE_SCALARS_INHANDLES(sc) (((sc) >> 4) & 0x0f) 69 70 /* Retrives number of output handles from the scalars parameter */ 71 #define REMOTE_SCALARS_OUTHANDLES(sc) ((sc) & 0x0f) 72 73 #define REMOTE_SCALARS_LENGTH(sc) (REMOTE_SCALARS_INBUFS(sc) + \ 74 REMOTE_SCALARS_OUTBUFS(sc) + \ 75 REMOTE_SCALARS_INHANDLES(sc)+ \ 76 REMOTE_SCALARS_OUTHANDLES(sc)) 77 #define FASTRPC_BUILD_SCALARS(attr, method, in, out, oin, oout) \ 78 (((attr & 0x07) << 29) | \ 79 ((method & 0x1f) << 24) | \ 80 ((in & 0xff) << 16) | \ 81 ((out & 0xff) << 8) | \ 82 ((oin & 0x0f) << 4) | \ 83 (oout & 0x0f)) 84 85 #define FASTRPC_SCALARS(method, in, out) \ 86 FASTRPC_BUILD_SCALARS(0, method, in, out, 0, 0) 87 88 #define FASTRPC_CREATE_PROCESS_NARGS 6 89 #define FASTRPC_CREATE_STATIC_PROCESS_NARGS 3 90 /* Remote Method id table */ 91 #define FASTRPC_RMID_INIT_ATTACH 0 92 #define FASTRPC_RMID_INIT_RELEASE 1 93 #define FASTRPC_RMID_INIT_MMAP 4 94 #define FASTRPC_RMID_INIT_MUNMAP 5 95 #define FASTRPC_RMID_INIT_CREATE 6 96 #define FASTRPC_RMID_INIT_CREATE_ATTR 7 97 #define FASTRPC_RMID_INIT_CREATE_STATIC 8 98 #define FASTRPC_RMID_INIT_MEM_MAP 10 99 #define FASTRPC_RMID_INIT_MEM_UNMAP 11 100 101 /* Protection Domain(PD) ids */ 102 #define ROOT_PD (0) 103 #define USER_PD (1) 104 #define SENSORS_PD (2) 105 106 #define miscdev_to_fdevice(d) container_of(d, struct fastrpc_device, miscdev) 107 108 static const char *domains[FASTRPC_DEV_MAX] = { "adsp", "mdsp", 109 "sdsp", "cdsp"}; 110 struct fastrpc_phy_page { 111 u64 addr; /* physical address */ 112 u64 size; /* size of contiguous region */ 113 }; 114 115 struct fastrpc_invoke_buf { 116 u32 num; /* number of contiguous regions */ 117 u32 pgidx; /* index to start of contiguous region */ 118 }; 119 120 struct fastrpc_remote_dmahandle { 121 s32 fd; /* dma handle fd */ 122 u32 offset; /* dma handle offset */ 123 u32 len; /* dma handle length */ 124 }; 125 126 struct fastrpc_remote_buf { 127 u64 pv; /* buffer pointer */ 128 u64 len; /* length of buffer */ 129 }; 130 131 union fastrpc_remote_arg { 132 struct fastrpc_remote_buf buf; 133 struct fastrpc_remote_dmahandle dma; 134 }; 135 136 struct fastrpc_mmap_rsp_msg { 137 u64 vaddr; 138 }; 139 140 struct fastrpc_mmap_req_msg { 141 s32 pgid; 142 u32 flags; 143 u64 vaddr; 144 s32 num; 145 }; 146 147 struct fastrpc_mem_map_req_msg { 148 s32 pgid; 149 s32 fd; 150 s32 offset; 151 u32 flags; 152 u64 vaddrin; 153 s32 num; 154 s32 data_len; 155 }; 156 157 struct fastrpc_munmap_req_msg { 158 s32 pgid; 159 u64 vaddr; 160 u64 size; 161 }; 162 163 struct fastrpc_mem_unmap_req_msg { 164 s32 pgid; 165 s32 fd; 166 u64 vaddrin; 167 u64 len; 168 }; 169 170 struct fastrpc_msg { 171 int pid; /* process group id */ 172 int tid; /* thread id */ 173 u64 ctx; /* invoke caller context */ 174 u32 handle; /* handle to invoke */ 175 u32 sc; /* scalars structure describing the data */ 176 u64 addr; /* physical address */ 177 u64 size; /* size of contiguous region */ 178 }; 179 180 struct fastrpc_invoke_rsp { 181 u64 ctx; /* invoke caller context */ 182 int retval; /* invoke return value */ 183 }; 184 185 struct fastrpc_buf_overlap { 186 u64 start; 187 u64 end; 188 int raix; 189 u64 mstart; 190 u64 mend; 191 u64 offset; 192 }; 193 194 struct fastrpc_buf { 195 struct fastrpc_user *fl; 196 struct dma_buf *dmabuf; 197 struct device *dev; 198 void *virt; 199 u64 phys; 200 u64 size; 201 /* Lock for dma buf attachments */ 202 struct mutex lock; 203 struct list_head attachments; 204 /* mmap support */ 205 struct list_head node; /* list of user requested mmaps */ 206 uintptr_t raddr; 207 }; 208 209 struct fastrpc_dma_buf_attachment { 210 struct device *dev; 211 struct sg_table sgt; 212 struct list_head node; 213 }; 214 215 struct fastrpc_map { 216 struct list_head node; 217 struct fastrpc_user *fl; 218 int fd; 219 struct dma_buf *buf; 220 struct sg_table *table; 221 struct dma_buf_attachment *attach; 222 u64 phys; 223 u64 size; 224 void *va; 225 u64 len; 226 u64 raddr; 227 u32 attr; 228 struct kref refcount; 229 }; 230 231 struct fastrpc_invoke_ctx { 232 int nscalars; 233 int nbufs; 234 int retval; 235 int pid; 236 int tgid; 237 u32 sc; 238 u32 *crc; 239 u64 ctxid; 240 u64 msg_sz; 241 struct kref refcount; 242 struct list_head node; /* list of ctxs */ 243 struct completion work; 244 struct work_struct put_work; 245 struct fastrpc_msg msg; 246 struct fastrpc_user *fl; 247 union fastrpc_remote_arg *rpra; 248 struct fastrpc_map **maps; 249 struct fastrpc_buf *buf; 250 struct fastrpc_invoke_args *args; 251 struct fastrpc_buf_overlap *olaps; 252 struct fastrpc_channel_ctx *cctx; 253 }; 254 255 struct fastrpc_session_ctx { 256 struct device *dev; 257 int sid; 258 bool used; 259 bool valid; 260 }; 261 262 struct fastrpc_channel_ctx { 263 int domain_id; 264 int sesscount; 265 int vmcount; 266 struct qcom_scm_vmperm vmperms[FASTRPC_MAX_VMIDS]; 267 struct rpmsg_device *rpdev; 268 struct fastrpc_session_ctx session[FASTRPC_MAX_SESSIONS]; 269 spinlock_t lock; 270 struct idr ctx_idr; 271 struct list_head users; 272 struct kref refcount; 273 /* Flag if dsp attributes are cached */ 274 bool valid_attributes; 275 u32 dsp_attributes[FASTRPC_MAX_DSP_ATTRIBUTES]; 276 struct fastrpc_device *secure_fdevice; 277 struct fastrpc_device *fdevice; 278 struct fastrpc_buf *remote_heap; 279 struct list_head invoke_interrupted_mmaps; 280 bool secure; 281 bool unsigned_support; 282 u64 dma_mask; 283 }; 284 285 struct fastrpc_device { 286 struct fastrpc_channel_ctx *cctx; 287 struct miscdevice miscdev; 288 bool secure; 289 }; 290 291 struct fastrpc_user { 292 struct list_head user; 293 struct list_head maps; 294 struct list_head pending; 295 struct list_head mmaps; 296 297 struct fastrpc_channel_ctx *cctx; 298 struct fastrpc_session_ctx *sctx; 299 struct fastrpc_buf *init_mem; 300 301 int tgid; 302 int pd; 303 bool is_secure_dev; 304 /* Lock for lists */ 305 spinlock_t lock; 306 /* lock for allocations */ 307 struct mutex mutex; 308 }; 309 310 static void fastrpc_free_map(struct kref *ref) 311 { 312 struct fastrpc_map *map; 313 314 map = container_of(ref, struct fastrpc_map, refcount); 315 316 if (map->table) { 317 if (map->attr & FASTRPC_ATTR_SECUREMAP) { 318 struct qcom_scm_vmperm perm; 319 int vmid = map->fl->cctx->vmperms[0].vmid; 320 u64 src_perms = BIT(QCOM_SCM_VMID_HLOS) | BIT(vmid); 321 int err = 0; 322 323 perm.vmid = QCOM_SCM_VMID_HLOS; 324 perm.perm = QCOM_SCM_PERM_RWX; 325 err = qcom_scm_assign_mem(map->phys, map->size, 326 &src_perms, &perm, 1); 327 if (err) { 328 dev_err(map->fl->sctx->dev, "Failed to assign memory phys 0x%llx size 0x%llx err %d\n", 329 map->phys, map->size, err); 330 return; 331 } 332 } 333 dma_buf_unmap_attachment_unlocked(map->attach, map->table, 334 DMA_BIDIRECTIONAL); 335 dma_buf_detach(map->buf, map->attach); 336 dma_buf_put(map->buf); 337 } 338 339 if (map->fl) { 340 spin_lock(&map->fl->lock); 341 list_del(&map->node); 342 spin_unlock(&map->fl->lock); 343 map->fl = NULL; 344 } 345 346 kfree(map); 347 } 348 349 static void fastrpc_map_put(struct fastrpc_map *map) 350 { 351 if (map) 352 kref_put(&map->refcount, fastrpc_free_map); 353 } 354 355 static int fastrpc_map_get(struct fastrpc_map *map) 356 { 357 if (!map) 358 return -ENOENT; 359 360 return kref_get_unless_zero(&map->refcount) ? 0 : -ENOENT; 361 } 362 363 364 static int fastrpc_map_lookup(struct fastrpc_user *fl, int fd, 365 struct fastrpc_map **ppmap, bool take_ref) 366 { 367 struct fastrpc_session_ctx *sess = fl->sctx; 368 struct fastrpc_map *map = NULL; 369 int ret = -ENOENT; 370 371 spin_lock(&fl->lock); 372 list_for_each_entry(map, &fl->maps, node) { 373 if (map->fd != fd) 374 continue; 375 376 if (take_ref) { 377 ret = fastrpc_map_get(map); 378 if (ret) { 379 dev_dbg(sess->dev, "%s: Failed to get map fd=%d ret=%d\n", 380 __func__, fd, ret); 381 break; 382 } 383 } 384 385 *ppmap = map; 386 ret = 0; 387 break; 388 } 389 spin_unlock(&fl->lock); 390 391 return ret; 392 } 393 394 static void fastrpc_buf_free(struct fastrpc_buf *buf) 395 { 396 dma_free_coherent(buf->dev, buf->size, buf->virt, 397 FASTRPC_PHYS(buf->phys)); 398 kfree(buf); 399 } 400 401 static int __fastrpc_buf_alloc(struct fastrpc_user *fl, struct device *dev, 402 u64 size, struct fastrpc_buf **obuf) 403 { 404 struct fastrpc_buf *buf; 405 406 buf = kzalloc(sizeof(*buf), GFP_KERNEL); 407 if (!buf) 408 return -ENOMEM; 409 410 INIT_LIST_HEAD(&buf->attachments); 411 INIT_LIST_HEAD(&buf->node); 412 mutex_init(&buf->lock); 413 414 buf->fl = fl; 415 buf->virt = NULL; 416 buf->phys = 0; 417 buf->size = size; 418 buf->dev = dev; 419 buf->raddr = 0; 420 421 buf->virt = dma_alloc_coherent(dev, buf->size, (dma_addr_t *)&buf->phys, 422 GFP_KERNEL); 423 if (!buf->virt) { 424 mutex_destroy(&buf->lock); 425 kfree(buf); 426 return -ENOMEM; 427 } 428 429 *obuf = buf; 430 431 return 0; 432 } 433 434 static int fastrpc_buf_alloc(struct fastrpc_user *fl, struct device *dev, 435 u64 size, struct fastrpc_buf **obuf) 436 { 437 int ret; 438 struct fastrpc_buf *buf; 439 440 ret = __fastrpc_buf_alloc(fl, dev, size, obuf); 441 if (ret) 442 return ret; 443 444 buf = *obuf; 445 446 if (fl->sctx && fl->sctx->sid) 447 buf->phys += ((u64)fl->sctx->sid << 32); 448 449 return 0; 450 } 451 452 static int fastrpc_remote_heap_alloc(struct fastrpc_user *fl, struct device *dev, 453 u64 size, struct fastrpc_buf **obuf) 454 { 455 struct device *rdev = &fl->cctx->rpdev->dev; 456 457 return __fastrpc_buf_alloc(fl, rdev, size, obuf); 458 } 459 460 static void fastrpc_channel_ctx_free(struct kref *ref) 461 { 462 struct fastrpc_channel_ctx *cctx; 463 464 cctx = container_of(ref, struct fastrpc_channel_ctx, refcount); 465 466 kfree(cctx); 467 } 468 469 static void fastrpc_channel_ctx_get(struct fastrpc_channel_ctx *cctx) 470 { 471 kref_get(&cctx->refcount); 472 } 473 474 static void fastrpc_channel_ctx_put(struct fastrpc_channel_ctx *cctx) 475 { 476 kref_put(&cctx->refcount, fastrpc_channel_ctx_free); 477 } 478 479 static void fastrpc_context_free(struct kref *ref) 480 { 481 struct fastrpc_invoke_ctx *ctx; 482 struct fastrpc_channel_ctx *cctx; 483 unsigned long flags; 484 int i; 485 486 ctx = container_of(ref, struct fastrpc_invoke_ctx, refcount); 487 cctx = ctx->cctx; 488 489 for (i = 0; i < ctx->nbufs; i++) 490 fastrpc_map_put(ctx->maps[i]); 491 492 if (ctx->buf) 493 fastrpc_buf_free(ctx->buf); 494 495 spin_lock_irqsave(&cctx->lock, flags); 496 idr_remove(&cctx->ctx_idr, ctx->ctxid >> 4); 497 spin_unlock_irqrestore(&cctx->lock, flags); 498 499 kfree(ctx->maps); 500 kfree(ctx->olaps); 501 kfree(ctx); 502 503 fastrpc_channel_ctx_put(cctx); 504 } 505 506 static void fastrpc_context_get(struct fastrpc_invoke_ctx *ctx) 507 { 508 kref_get(&ctx->refcount); 509 } 510 511 static void fastrpc_context_put(struct fastrpc_invoke_ctx *ctx) 512 { 513 kref_put(&ctx->refcount, fastrpc_context_free); 514 } 515 516 static void fastrpc_context_put_wq(struct work_struct *work) 517 { 518 struct fastrpc_invoke_ctx *ctx = 519 container_of(work, struct fastrpc_invoke_ctx, put_work); 520 521 fastrpc_context_put(ctx); 522 } 523 524 #define CMP(aa, bb) ((aa) == (bb) ? 0 : (aa) < (bb) ? -1 : 1) 525 static int olaps_cmp(const void *a, const void *b) 526 { 527 struct fastrpc_buf_overlap *pa = (struct fastrpc_buf_overlap *)a; 528 struct fastrpc_buf_overlap *pb = (struct fastrpc_buf_overlap *)b; 529 /* sort with lowest starting buffer first */ 530 int st = CMP(pa->start, pb->start); 531 /* sort with highest ending buffer first */ 532 int ed = CMP(pb->end, pa->end); 533 534 return st == 0 ? ed : st; 535 } 536 537 static void fastrpc_get_buff_overlaps(struct fastrpc_invoke_ctx *ctx) 538 { 539 u64 max_end = 0; 540 int i; 541 542 for (i = 0; i < ctx->nbufs; ++i) { 543 ctx->olaps[i].start = ctx->args[i].ptr; 544 ctx->olaps[i].end = ctx->olaps[i].start + ctx->args[i].length; 545 ctx->olaps[i].raix = i; 546 } 547 548 sort(ctx->olaps, ctx->nbufs, sizeof(*ctx->olaps), olaps_cmp, NULL); 549 550 for (i = 0; i < ctx->nbufs; ++i) { 551 /* Falling inside previous range */ 552 if (ctx->olaps[i].start < max_end) { 553 ctx->olaps[i].mstart = max_end; 554 ctx->olaps[i].mend = ctx->olaps[i].end; 555 ctx->olaps[i].offset = max_end - ctx->olaps[i].start; 556 557 if (ctx->olaps[i].end > max_end) { 558 max_end = ctx->olaps[i].end; 559 } else { 560 ctx->olaps[i].mend = 0; 561 ctx->olaps[i].mstart = 0; 562 } 563 564 } else { 565 ctx->olaps[i].mend = ctx->olaps[i].end; 566 ctx->olaps[i].mstart = ctx->olaps[i].start; 567 ctx->olaps[i].offset = 0; 568 max_end = ctx->olaps[i].end; 569 } 570 } 571 } 572 573 static struct fastrpc_invoke_ctx *fastrpc_context_alloc( 574 struct fastrpc_user *user, u32 kernel, u32 sc, 575 struct fastrpc_invoke_args *args) 576 { 577 struct fastrpc_channel_ctx *cctx = user->cctx; 578 struct fastrpc_invoke_ctx *ctx = NULL; 579 unsigned long flags; 580 int ret; 581 582 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 583 if (!ctx) 584 return ERR_PTR(-ENOMEM); 585 586 INIT_LIST_HEAD(&ctx->node); 587 ctx->fl = user; 588 ctx->nscalars = REMOTE_SCALARS_LENGTH(sc); 589 ctx->nbufs = REMOTE_SCALARS_INBUFS(sc) + 590 REMOTE_SCALARS_OUTBUFS(sc); 591 592 if (ctx->nscalars) { 593 ctx->maps = kcalloc(ctx->nscalars, 594 sizeof(*ctx->maps), GFP_KERNEL); 595 if (!ctx->maps) { 596 kfree(ctx); 597 return ERR_PTR(-ENOMEM); 598 } 599 ctx->olaps = kcalloc(ctx->nscalars, 600 sizeof(*ctx->olaps), GFP_KERNEL); 601 if (!ctx->olaps) { 602 kfree(ctx->maps); 603 kfree(ctx); 604 return ERR_PTR(-ENOMEM); 605 } 606 ctx->args = args; 607 fastrpc_get_buff_overlaps(ctx); 608 } 609 610 /* Released in fastrpc_context_put() */ 611 fastrpc_channel_ctx_get(cctx); 612 613 ctx->sc = sc; 614 ctx->retval = -1; 615 ctx->pid = current->pid; 616 ctx->tgid = user->tgid; 617 ctx->cctx = cctx; 618 init_completion(&ctx->work); 619 INIT_WORK(&ctx->put_work, fastrpc_context_put_wq); 620 621 spin_lock(&user->lock); 622 list_add_tail(&ctx->node, &user->pending); 623 spin_unlock(&user->lock); 624 625 spin_lock_irqsave(&cctx->lock, flags); 626 ret = idr_alloc_cyclic(&cctx->ctx_idr, ctx, 1, 627 FASTRPC_CTX_MAX, GFP_ATOMIC); 628 if (ret < 0) { 629 spin_unlock_irqrestore(&cctx->lock, flags); 630 goto err_idr; 631 } 632 ctx->ctxid = ret << 4; 633 spin_unlock_irqrestore(&cctx->lock, flags); 634 635 kref_init(&ctx->refcount); 636 637 return ctx; 638 err_idr: 639 spin_lock(&user->lock); 640 list_del(&ctx->node); 641 spin_unlock(&user->lock); 642 fastrpc_channel_ctx_put(cctx); 643 kfree(ctx->maps); 644 kfree(ctx->olaps); 645 kfree(ctx); 646 647 return ERR_PTR(ret); 648 } 649 650 static struct sg_table * 651 fastrpc_map_dma_buf(struct dma_buf_attachment *attachment, 652 enum dma_data_direction dir) 653 { 654 struct fastrpc_dma_buf_attachment *a = attachment->priv; 655 struct sg_table *table; 656 int ret; 657 658 table = &a->sgt; 659 660 ret = dma_map_sgtable(attachment->dev, table, dir, 0); 661 if (ret) 662 table = ERR_PTR(ret); 663 return table; 664 } 665 666 static void fastrpc_unmap_dma_buf(struct dma_buf_attachment *attach, 667 struct sg_table *table, 668 enum dma_data_direction dir) 669 { 670 dma_unmap_sgtable(attach->dev, table, dir, 0); 671 } 672 673 static void fastrpc_release(struct dma_buf *dmabuf) 674 { 675 struct fastrpc_buf *buffer = dmabuf->priv; 676 677 fastrpc_buf_free(buffer); 678 } 679 680 static int fastrpc_dma_buf_attach(struct dma_buf *dmabuf, 681 struct dma_buf_attachment *attachment) 682 { 683 struct fastrpc_dma_buf_attachment *a; 684 struct fastrpc_buf *buffer = dmabuf->priv; 685 int ret; 686 687 a = kzalloc(sizeof(*a), GFP_KERNEL); 688 if (!a) 689 return -ENOMEM; 690 691 ret = dma_get_sgtable(buffer->dev, &a->sgt, buffer->virt, 692 FASTRPC_PHYS(buffer->phys), buffer->size); 693 if (ret < 0) { 694 dev_err(buffer->dev, "failed to get scatterlist from DMA API\n"); 695 kfree(a); 696 return -EINVAL; 697 } 698 699 a->dev = attachment->dev; 700 INIT_LIST_HEAD(&a->node); 701 attachment->priv = a; 702 703 mutex_lock(&buffer->lock); 704 list_add(&a->node, &buffer->attachments); 705 mutex_unlock(&buffer->lock); 706 707 return 0; 708 } 709 710 static void fastrpc_dma_buf_detatch(struct dma_buf *dmabuf, 711 struct dma_buf_attachment *attachment) 712 { 713 struct fastrpc_dma_buf_attachment *a = attachment->priv; 714 struct fastrpc_buf *buffer = dmabuf->priv; 715 716 mutex_lock(&buffer->lock); 717 list_del(&a->node); 718 mutex_unlock(&buffer->lock); 719 sg_free_table(&a->sgt); 720 kfree(a); 721 } 722 723 static int fastrpc_vmap(struct dma_buf *dmabuf, struct iosys_map *map) 724 { 725 struct fastrpc_buf *buf = dmabuf->priv; 726 727 iosys_map_set_vaddr(map, buf->virt); 728 729 return 0; 730 } 731 732 static int fastrpc_mmap(struct dma_buf *dmabuf, 733 struct vm_area_struct *vma) 734 { 735 struct fastrpc_buf *buf = dmabuf->priv; 736 size_t size = vma->vm_end - vma->vm_start; 737 738 dma_resv_assert_held(dmabuf->resv); 739 740 return dma_mmap_coherent(buf->dev, vma, buf->virt, 741 FASTRPC_PHYS(buf->phys), size); 742 } 743 744 static const struct dma_buf_ops fastrpc_dma_buf_ops = { 745 .attach = fastrpc_dma_buf_attach, 746 .detach = fastrpc_dma_buf_detatch, 747 .map_dma_buf = fastrpc_map_dma_buf, 748 .unmap_dma_buf = fastrpc_unmap_dma_buf, 749 .mmap = fastrpc_mmap, 750 .vmap = fastrpc_vmap, 751 .release = fastrpc_release, 752 }; 753 754 static int fastrpc_map_create(struct fastrpc_user *fl, int fd, 755 u64 len, u32 attr, struct fastrpc_map **ppmap) 756 { 757 struct fastrpc_session_ctx *sess = fl->sctx; 758 struct fastrpc_map *map = NULL; 759 struct sg_table *table; 760 int err = 0; 761 762 if (!fastrpc_map_lookup(fl, fd, ppmap, true)) 763 return 0; 764 765 map = kzalloc(sizeof(*map), GFP_KERNEL); 766 if (!map) 767 return -ENOMEM; 768 769 INIT_LIST_HEAD(&map->node); 770 kref_init(&map->refcount); 771 772 map->fl = fl; 773 map->fd = fd; 774 map->buf = dma_buf_get(fd); 775 if (IS_ERR(map->buf)) { 776 err = PTR_ERR(map->buf); 777 goto get_err; 778 } 779 780 map->attach = dma_buf_attach(map->buf, sess->dev); 781 if (IS_ERR(map->attach)) { 782 dev_err(sess->dev, "Failed to attach dmabuf\n"); 783 err = PTR_ERR(map->attach); 784 goto attach_err; 785 } 786 787 table = dma_buf_map_attachment_unlocked(map->attach, DMA_BIDIRECTIONAL); 788 if (IS_ERR(table)) { 789 err = PTR_ERR(table); 790 goto map_err; 791 } 792 map->table = table; 793 794 if (attr & FASTRPC_ATTR_SECUREMAP) { 795 map->phys = sg_phys(map->table->sgl); 796 } else { 797 map->phys = sg_dma_address(map->table->sgl); 798 map->phys += ((u64)fl->sctx->sid << 32); 799 } 800 map->size = len; 801 map->va = sg_virt(map->table->sgl); 802 map->len = len; 803 804 if (attr & FASTRPC_ATTR_SECUREMAP) { 805 /* 806 * If subsystem VMIDs are defined in DTSI, then do 807 * hyp_assign from HLOS to those VM(s) 808 */ 809 u64 src_perms = BIT(QCOM_SCM_VMID_HLOS); 810 struct qcom_scm_vmperm dst_perms[2] = {0}; 811 812 dst_perms[0].vmid = QCOM_SCM_VMID_HLOS; 813 dst_perms[0].perm = QCOM_SCM_PERM_RW; 814 dst_perms[1].vmid = fl->cctx->vmperms[0].vmid; 815 dst_perms[1].perm = QCOM_SCM_PERM_RWX; 816 map->attr = attr; 817 err = qcom_scm_assign_mem(map->phys, (u64)map->size, &src_perms, dst_perms, 2); 818 if (err) { 819 dev_err(sess->dev, "Failed to assign memory with phys 0x%llx size 0x%llx err %d\n", 820 map->phys, map->size, err); 821 goto map_err; 822 } 823 } 824 spin_lock(&fl->lock); 825 list_add_tail(&map->node, &fl->maps); 826 spin_unlock(&fl->lock); 827 *ppmap = map; 828 829 return 0; 830 831 map_err: 832 dma_buf_detach(map->buf, map->attach); 833 attach_err: 834 dma_buf_put(map->buf); 835 get_err: 836 fastrpc_map_put(map); 837 838 return err; 839 } 840 841 /* 842 * Fastrpc payload buffer with metadata looks like: 843 * 844 * >>>>>> START of METADATA <<<<<<<<< 845 * +---------------------------------+ 846 * | Arguments | 847 * | type:(union fastrpc_remote_arg)| 848 * | (0 - N) | 849 * +---------------------------------+ 850 * | Invoke Buffer list | 851 * | type:(struct fastrpc_invoke_buf)| 852 * | (0 - N) | 853 * +---------------------------------+ 854 * | Page info list | 855 * | type:(struct fastrpc_phy_page) | 856 * | (0 - N) | 857 * +---------------------------------+ 858 * | Optional info | 859 * |(can be specific to SoC/Firmware)| 860 * +---------------------------------+ 861 * >>>>>>>> END of METADATA <<<<<<<<< 862 * +---------------------------------+ 863 * | Inline ARGS | 864 * | (0-N) | 865 * +---------------------------------+ 866 */ 867 868 static int fastrpc_get_meta_size(struct fastrpc_invoke_ctx *ctx) 869 { 870 int size = 0; 871 872 size = (sizeof(struct fastrpc_remote_buf) + 873 sizeof(struct fastrpc_invoke_buf) + 874 sizeof(struct fastrpc_phy_page)) * ctx->nscalars + 875 sizeof(u64) * FASTRPC_MAX_FDLIST + 876 sizeof(u32) * FASTRPC_MAX_CRCLIST; 877 878 return size; 879 } 880 881 static u64 fastrpc_get_payload_size(struct fastrpc_invoke_ctx *ctx, int metalen) 882 { 883 u64 size = 0; 884 int oix; 885 886 size = ALIGN(metalen, FASTRPC_ALIGN); 887 for (oix = 0; oix < ctx->nbufs; oix++) { 888 int i = ctx->olaps[oix].raix; 889 890 if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1) { 891 892 if (ctx->olaps[oix].offset == 0) 893 size = ALIGN(size, FASTRPC_ALIGN); 894 895 size += (ctx->olaps[oix].mend - ctx->olaps[oix].mstart); 896 } 897 } 898 899 return size; 900 } 901 902 static int fastrpc_create_maps(struct fastrpc_invoke_ctx *ctx) 903 { 904 struct device *dev = ctx->fl->sctx->dev; 905 int i, err; 906 907 for (i = 0; i < ctx->nscalars; ++i) { 908 909 if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1 || 910 ctx->args[i].length == 0) 911 continue; 912 913 err = fastrpc_map_create(ctx->fl, ctx->args[i].fd, 914 ctx->args[i].length, ctx->args[i].attr, &ctx->maps[i]); 915 if (err) { 916 dev_err(dev, "Error Creating map %d\n", err); 917 return -EINVAL; 918 } 919 920 } 921 return 0; 922 } 923 924 static struct fastrpc_invoke_buf *fastrpc_invoke_buf_start(union fastrpc_remote_arg *pra, int len) 925 { 926 return (struct fastrpc_invoke_buf *)(&pra[len]); 927 } 928 929 static struct fastrpc_phy_page *fastrpc_phy_page_start(struct fastrpc_invoke_buf *buf, int len) 930 { 931 return (struct fastrpc_phy_page *)(&buf[len]); 932 } 933 934 static int fastrpc_get_args(u32 kernel, struct fastrpc_invoke_ctx *ctx) 935 { 936 struct device *dev = ctx->fl->sctx->dev; 937 union fastrpc_remote_arg *rpra; 938 struct fastrpc_invoke_buf *list; 939 struct fastrpc_phy_page *pages; 940 int inbufs, i, oix, err = 0; 941 u64 len, rlen, pkt_size; 942 u64 pg_start, pg_end; 943 uintptr_t args; 944 int metalen; 945 946 inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); 947 metalen = fastrpc_get_meta_size(ctx); 948 pkt_size = fastrpc_get_payload_size(ctx, metalen); 949 950 err = fastrpc_create_maps(ctx); 951 if (err) 952 return err; 953 954 ctx->msg_sz = pkt_size; 955 956 if (ctx->fl->sctx->sid) 957 err = fastrpc_buf_alloc(ctx->fl, dev, pkt_size, &ctx->buf); 958 else 959 err = fastrpc_remote_heap_alloc(ctx->fl, dev, pkt_size, &ctx->buf); 960 if (err) 961 return err; 962 963 memset(ctx->buf->virt, 0, pkt_size); 964 rpra = ctx->buf->virt; 965 list = fastrpc_invoke_buf_start(rpra, ctx->nscalars); 966 pages = fastrpc_phy_page_start(list, ctx->nscalars); 967 args = (uintptr_t)ctx->buf->virt + metalen; 968 rlen = pkt_size - metalen; 969 ctx->rpra = rpra; 970 971 for (oix = 0; oix < ctx->nbufs; ++oix) { 972 int mlen; 973 974 i = ctx->olaps[oix].raix; 975 len = ctx->args[i].length; 976 977 rpra[i].buf.pv = 0; 978 rpra[i].buf.len = len; 979 list[i].num = len ? 1 : 0; 980 list[i].pgidx = i; 981 982 if (!len) 983 continue; 984 985 if (ctx->maps[i]) { 986 struct vm_area_struct *vma = NULL; 987 988 rpra[i].buf.pv = (u64) ctx->args[i].ptr; 989 pages[i].addr = ctx->maps[i]->phys; 990 991 mmap_read_lock(current->mm); 992 vma = find_vma(current->mm, ctx->args[i].ptr); 993 if (vma) 994 pages[i].addr += ctx->args[i].ptr - 995 vma->vm_start; 996 mmap_read_unlock(current->mm); 997 998 pg_start = (ctx->args[i].ptr & PAGE_MASK) >> PAGE_SHIFT; 999 pg_end = ((ctx->args[i].ptr + len - 1) & PAGE_MASK) >> 1000 PAGE_SHIFT; 1001 pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; 1002 1003 } else { 1004 1005 if (ctx->olaps[oix].offset == 0) { 1006 rlen -= ALIGN(args, FASTRPC_ALIGN) - args; 1007 args = ALIGN(args, FASTRPC_ALIGN); 1008 } 1009 1010 mlen = ctx->olaps[oix].mend - ctx->olaps[oix].mstart; 1011 1012 if (rlen < mlen) 1013 goto bail; 1014 1015 rpra[i].buf.pv = args - ctx->olaps[oix].offset; 1016 pages[i].addr = ctx->buf->phys - 1017 ctx->olaps[oix].offset + 1018 (pkt_size - rlen); 1019 pages[i].addr = pages[i].addr & PAGE_MASK; 1020 1021 pg_start = (args & PAGE_MASK) >> PAGE_SHIFT; 1022 pg_end = ((args + len - 1) & PAGE_MASK) >> PAGE_SHIFT; 1023 pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; 1024 args = args + mlen; 1025 rlen -= mlen; 1026 } 1027 1028 if (i < inbufs && !ctx->maps[i]) { 1029 void *dst = (void *)(uintptr_t)rpra[i].buf.pv; 1030 void *src = (void *)(uintptr_t)ctx->args[i].ptr; 1031 1032 if (!kernel) { 1033 if (copy_from_user(dst, (void __user *)src, 1034 len)) { 1035 err = -EFAULT; 1036 goto bail; 1037 } 1038 } else { 1039 memcpy(dst, src, len); 1040 } 1041 } 1042 } 1043 1044 for (i = ctx->nbufs; i < ctx->nscalars; ++i) { 1045 list[i].num = ctx->args[i].length ? 1 : 0; 1046 list[i].pgidx = i; 1047 if (ctx->maps[i]) { 1048 pages[i].addr = ctx->maps[i]->phys; 1049 pages[i].size = ctx->maps[i]->size; 1050 } 1051 rpra[i].dma.fd = ctx->args[i].fd; 1052 rpra[i].dma.len = ctx->args[i].length; 1053 rpra[i].dma.offset = (u64) ctx->args[i].ptr; 1054 } 1055 1056 bail: 1057 if (err) 1058 dev_err(dev, "Error: get invoke args failed:%d\n", err); 1059 1060 return err; 1061 } 1062 1063 static int fastrpc_put_args(struct fastrpc_invoke_ctx *ctx, 1064 u32 kernel) 1065 { 1066 union fastrpc_remote_arg *rpra = ctx->rpra; 1067 struct fastrpc_user *fl = ctx->fl; 1068 struct fastrpc_map *mmap = NULL; 1069 struct fastrpc_invoke_buf *list; 1070 struct fastrpc_phy_page *pages; 1071 u64 *fdlist; 1072 int i, inbufs, outbufs, handles; 1073 1074 inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); 1075 outbufs = REMOTE_SCALARS_OUTBUFS(ctx->sc); 1076 handles = REMOTE_SCALARS_INHANDLES(ctx->sc) + REMOTE_SCALARS_OUTHANDLES(ctx->sc); 1077 list = fastrpc_invoke_buf_start(rpra, ctx->nscalars); 1078 pages = fastrpc_phy_page_start(list, ctx->nscalars); 1079 fdlist = (uint64_t *)(pages + inbufs + outbufs + handles); 1080 1081 for (i = inbufs; i < ctx->nbufs; ++i) { 1082 if (!ctx->maps[i]) { 1083 void *src = (void *)(uintptr_t)rpra[i].buf.pv; 1084 void *dst = (void *)(uintptr_t)ctx->args[i].ptr; 1085 u64 len = rpra[i].buf.len; 1086 1087 if (!kernel) { 1088 if (copy_to_user((void __user *)dst, src, len)) 1089 return -EFAULT; 1090 } else { 1091 memcpy(dst, src, len); 1092 } 1093 } 1094 } 1095 1096 /* Clean up fdlist which is updated by DSP */ 1097 for (i = 0; i < FASTRPC_MAX_FDLIST; i++) { 1098 if (!fdlist[i]) 1099 break; 1100 if (!fastrpc_map_lookup(fl, (int)fdlist[i], &mmap, false)) 1101 fastrpc_map_put(mmap); 1102 } 1103 1104 return 0; 1105 } 1106 1107 static int fastrpc_invoke_send(struct fastrpc_session_ctx *sctx, 1108 struct fastrpc_invoke_ctx *ctx, 1109 u32 kernel, uint32_t handle) 1110 { 1111 struct fastrpc_channel_ctx *cctx; 1112 struct fastrpc_user *fl = ctx->fl; 1113 struct fastrpc_msg *msg = &ctx->msg; 1114 int ret; 1115 1116 cctx = fl->cctx; 1117 msg->pid = fl->tgid; 1118 msg->tid = current->pid; 1119 1120 if (kernel) 1121 msg->pid = 0; 1122 1123 msg->ctx = ctx->ctxid | fl->pd; 1124 msg->handle = handle; 1125 msg->sc = ctx->sc; 1126 msg->addr = ctx->buf ? ctx->buf->phys : 0; 1127 msg->size = roundup(ctx->msg_sz, PAGE_SIZE); 1128 fastrpc_context_get(ctx); 1129 1130 ret = rpmsg_send(cctx->rpdev->ept, (void *)msg, sizeof(*msg)); 1131 1132 if (ret) 1133 fastrpc_context_put(ctx); 1134 1135 return ret; 1136 1137 } 1138 1139 static int fastrpc_internal_invoke(struct fastrpc_user *fl, u32 kernel, 1140 u32 handle, u32 sc, 1141 struct fastrpc_invoke_args *args) 1142 { 1143 struct fastrpc_invoke_ctx *ctx = NULL; 1144 struct fastrpc_buf *buf, *b; 1145 1146 int err = 0; 1147 1148 if (!fl->sctx) 1149 return -EINVAL; 1150 1151 if (!fl->cctx->rpdev) 1152 return -EPIPE; 1153 1154 if (handle == FASTRPC_INIT_HANDLE && !kernel) { 1155 dev_warn_ratelimited(fl->sctx->dev, "user app trying to send a kernel RPC message (%d)\n", handle); 1156 return -EPERM; 1157 } 1158 1159 ctx = fastrpc_context_alloc(fl, kernel, sc, args); 1160 if (IS_ERR(ctx)) 1161 return PTR_ERR(ctx); 1162 1163 err = fastrpc_get_args(kernel, ctx); 1164 if (err) 1165 goto bail; 1166 1167 /* make sure that all CPU memory writes are seen by DSP */ 1168 dma_wmb(); 1169 /* Send invoke buffer to remote dsp */ 1170 err = fastrpc_invoke_send(fl->sctx, ctx, kernel, handle); 1171 if (err) 1172 goto bail; 1173 1174 if (kernel) { 1175 if (!wait_for_completion_timeout(&ctx->work, 10 * HZ)) 1176 err = -ETIMEDOUT; 1177 } else { 1178 err = wait_for_completion_interruptible(&ctx->work); 1179 } 1180 1181 if (err) 1182 goto bail; 1183 1184 /* make sure that all memory writes by DSP are seen by CPU */ 1185 dma_rmb(); 1186 /* populate all the output buffers with results */ 1187 err = fastrpc_put_args(ctx, kernel); 1188 if (err) 1189 goto bail; 1190 1191 /* Check the response from remote dsp */ 1192 err = ctx->retval; 1193 if (err) 1194 goto bail; 1195 1196 bail: 1197 if (err != -ERESTARTSYS && err != -ETIMEDOUT) { 1198 /* We are done with this compute context */ 1199 spin_lock(&fl->lock); 1200 list_del(&ctx->node); 1201 spin_unlock(&fl->lock); 1202 fastrpc_context_put(ctx); 1203 } 1204 1205 if (err == -ERESTARTSYS) { 1206 list_for_each_entry_safe(buf, b, &fl->mmaps, node) { 1207 list_del(&buf->node); 1208 list_add_tail(&buf->node, &fl->cctx->invoke_interrupted_mmaps); 1209 } 1210 } 1211 1212 if (err) 1213 dev_dbg(fl->sctx->dev, "Error: Invoke Failed %d\n", err); 1214 1215 return err; 1216 } 1217 1218 static bool is_session_rejected(struct fastrpc_user *fl, bool unsigned_pd_request) 1219 { 1220 /* Check if the device node is non-secure and channel is secure*/ 1221 if (!fl->is_secure_dev && fl->cctx->secure) { 1222 /* 1223 * Allow untrusted applications to offload only to Unsigned PD when 1224 * channel is configured as secure and block untrusted apps on channel 1225 * that does not support unsigned PD offload 1226 */ 1227 if (!fl->cctx->unsigned_support || !unsigned_pd_request) { 1228 dev_err(&fl->cctx->rpdev->dev, "Error: Untrusted application trying to offload to signed PD\n"); 1229 return true; 1230 } 1231 } 1232 1233 return false; 1234 } 1235 1236 static int fastrpc_init_create_static_process(struct fastrpc_user *fl, 1237 char __user *argp) 1238 { 1239 struct fastrpc_init_create_static init; 1240 struct fastrpc_invoke_args *args; 1241 struct fastrpc_phy_page pages[1]; 1242 char *name; 1243 int err; 1244 struct { 1245 int pgid; 1246 u32 namelen; 1247 u32 pageslen; 1248 } inbuf; 1249 u32 sc; 1250 1251 args = kcalloc(FASTRPC_CREATE_STATIC_PROCESS_NARGS, sizeof(*args), GFP_KERNEL); 1252 if (!args) 1253 return -ENOMEM; 1254 1255 if (copy_from_user(&init, argp, sizeof(init))) { 1256 err = -EFAULT; 1257 goto err; 1258 } 1259 1260 if (init.namelen > INIT_FILE_NAMELEN_MAX) { 1261 err = -EINVAL; 1262 goto err; 1263 } 1264 1265 name = memdup_user(u64_to_user_ptr(init.name), init.namelen); 1266 if (IS_ERR(name)) { 1267 err = PTR_ERR(name); 1268 goto err; 1269 } 1270 1271 if (!fl->cctx->remote_heap) { 1272 err = fastrpc_remote_heap_alloc(fl, fl->sctx->dev, init.memlen, 1273 &fl->cctx->remote_heap); 1274 if (err) 1275 goto err_name; 1276 1277 /* Map if we have any heap VMIDs associated with this ADSP Static Process. */ 1278 if (fl->cctx->vmcount) { 1279 u64 src_perms = BIT(QCOM_SCM_VMID_HLOS); 1280 1281 err = qcom_scm_assign_mem(fl->cctx->remote_heap->phys, 1282 (u64)fl->cctx->remote_heap->size, 1283 &src_perms, 1284 fl->cctx->vmperms, fl->cctx->vmcount); 1285 if (err) { 1286 dev_err(fl->sctx->dev, "Failed to assign memory with phys 0x%llx size 0x%llx err %d\n", 1287 fl->cctx->remote_heap->phys, fl->cctx->remote_heap->size, err); 1288 goto err_map; 1289 } 1290 } 1291 } 1292 1293 inbuf.pgid = fl->tgid; 1294 inbuf.namelen = init.namelen; 1295 inbuf.pageslen = 0; 1296 fl->pd = USER_PD; 1297 1298 args[0].ptr = (u64)(uintptr_t)&inbuf; 1299 args[0].length = sizeof(inbuf); 1300 args[0].fd = -1; 1301 1302 args[1].ptr = (u64)(uintptr_t)name; 1303 args[1].length = inbuf.namelen; 1304 args[1].fd = -1; 1305 1306 pages[0].addr = fl->cctx->remote_heap->phys; 1307 pages[0].size = fl->cctx->remote_heap->size; 1308 1309 args[2].ptr = (u64)(uintptr_t) pages; 1310 args[2].length = sizeof(*pages); 1311 args[2].fd = -1; 1312 1313 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE_STATIC, 3, 0); 1314 1315 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1316 sc, args); 1317 if (err) 1318 goto err_invoke; 1319 1320 kfree(args); 1321 1322 return 0; 1323 err_invoke: 1324 if (fl->cctx->vmcount) { 1325 u64 src_perms = 0; 1326 struct qcom_scm_vmperm dst_perms; 1327 u32 i; 1328 1329 for (i = 0; i < fl->cctx->vmcount; i++) 1330 src_perms |= BIT(fl->cctx->vmperms[i].vmid); 1331 1332 dst_perms.vmid = QCOM_SCM_VMID_HLOS; 1333 dst_perms.perm = QCOM_SCM_PERM_RWX; 1334 err = qcom_scm_assign_mem(fl->cctx->remote_heap->phys, 1335 (u64)fl->cctx->remote_heap->size, 1336 &src_perms, &dst_perms, 1); 1337 if (err) 1338 dev_err(fl->sctx->dev, "Failed to assign memory phys 0x%llx size 0x%llx err %d\n", 1339 fl->cctx->remote_heap->phys, fl->cctx->remote_heap->size, err); 1340 } 1341 err_map: 1342 fastrpc_buf_free(fl->cctx->remote_heap); 1343 err_name: 1344 kfree(name); 1345 err: 1346 kfree(args); 1347 1348 return err; 1349 } 1350 1351 static int fastrpc_init_create_process(struct fastrpc_user *fl, 1352 char __user *argp) 1353 { 1354 struct fastrpc_init_create init; 1355 struct fastrpc_invoke_args *args; 1356 struct fastrpc_phy_page pages[1]; 1357 struct fastrpc_map *map = NULL; 1358 struct fastrpc_buf *imem = NULL; 1359 int memlen; 1360 int err; 1361 struct { 1362 int pgid; 1363 u32 namelen; 1364 u32 filelen; 1365 u32 pageslen; 1366 u32 attrs; 1367 u32 siglen; 1368 } inbuf; 1369 u32 sc; 1370 bool unsigned_module = false; 1371 1372 args = kcalloc(FASTRPC_CREATE_PROCESS_NARGS, sizeof(*args), GFP_KERNEL); 1373 if (!args) 1374 return -ENOMEM; 1375 1376 if (copy_from_user(&init, argp, sizeof(init))) { 1377 err = -EFAULT; 1378 goto err; 1379 } 1380 1381 if (init.attrs & FASTRPC_MODE_UNSIGNED_MODULE) 1382 unsigned_module = true; 1383 1384 if (is_session_rejected(fl, unsigned_module)) { 1385 err = -ECONNREFUSED; 1386 goto err; 1387 } 1388 1389 if (init.filelen > INIT_FILELEN_MAX) { 1390 err = -EINVAL; 1391 goto err; 1392 } 1393 1394 inbuf.pgid = fl->tgid; 1395 inbuf.namelen = strlen(current->comm) + 1; 1396 inbuf.filelen = init.filelen; 1397 inbuf.pageslen = 1; 1398 inbuf.attrs = init.attrs; 1399 inbuf.siglen = init.siglen; 1400 fl->pd = USER_PD; 1401 1402 if (init.filelen && init.filefd) { 1403 err = fastrpc_map_create(fl, init.filefd, init.filelen, 0, &map); 1404 if (err) 1405 goto err; 1406 } 1407 1408 memlen = ALIGN(max(INIT_FILELEN_MAX, (int)init.filelen * 4), 1409 1024 * 1024); 1410 err = fastrpc_buf_alloc(fl, fl->sctx->dev, memlen, 1411 &imem); 1412 if (err) 1413 goto err_alloc; 1414 1415 fl->init_mem = imem; 1416 args[0].ptr = (u64)(uintptr_t)&inbuf; 1417 args[0].length = sizeof(inbuf); 1418 args[0].fd = -1; 1419 1420 args[1].ptr = (u64)(uintptr_t)current->comm; 1421 args[1].length = inbuf.namelen; 1422 args[1].fd = -1; 1423 1424 args[2].ptr = (u64) init.file; 1425 args[2].length = inbuf.filelen; 1426 args[2].fd = init.filefd; 1427 1428 pages[0].addr = imem->phys; 1429 pages[0].size = imem->size; 1430 1431 args[3].ptr = (u64)(uintptr_t) pages; 1432 args[3].length = 1 * sizeof(*pages); 1433 args[3].fd = -1; 1434 1435 args[4].ptr = (u64)(uintptr_t)&inbuf.attrs; 1436 args[4].length = sizeof(inbuf.attrs); 1437 args[4].fd = -1; 1438 1439 args[5].ptr = (u64)(uintptr_t) &inbuf.siglen; 1440 args[5].length = sizeof(inbuf.siglen); 1441 args[5].fd = -1; 1442 1443 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE, 4, 0); 1444 if (init.attrs) 1445 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE_ATTR, 4, 0); 1446 1447 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1448 sc, args); 1449 if (err) 1450 goto err_invoke; 1451 1452 kfree(args); 1453 1454 return 0; 1455 1456 err_invoke: 1457 fl->init_mem = NULL; 1458 fastrpc_buf_free(imem); 1459 err_alloc: 1460 fastrpc_map_put(map); 1461 err: 1462 kfree(args); 1463 1464 return err; 1465 } 1466 1467 static struct fastrpc_session_ctx *fastrpc_session_alloc( 1468 struct fastrpc_channel_ctx *cctx) 1469 { 1470 struct fastrpc_session_ctx *session = NULL; 1471 unsigned long flags; 1472 int i; 1473 1474 spin_lock_irqsave(&cctx->lock, flags); 1475 for (i = 0; i < cctx->sesscount; i++) { 1476 if (!cctx->session[i].used && cctx->session[i].valid) { 1477 cctx->session[i].used = true; 1478 session = &cctx->session[i]; 1479 break; 1480 } 1481 } 1482 spin_unlock_irqrestore(&cctx->lock, flags); 1483 1484 return session; 1485 } 1486 1487 static void fastrpc_session_free(struct fastrpc_channel_ctx *cctx, 1488 struct fastrpc_session_ctx *session) 1489 { 1490 unsigned long flags; 1491 1492 spin_lock_irqsave(&cctx->lock, flags); 1493 session->used = false; 1494 spin_unlock_irqrestore(&cctx->lock, flags); 1495 } 1496 1497 static int fastrpc_release_current_dsp_process(struct fastrpc_user *fl) 1498 { 1499 struct fastrpc_invoke_args args[1]; 1500 int tgid = 0; 1501 u32 sc; 1502 1503 tgid = fl->tgid; 1504 args[0].ptr = (u64)(uintptr_t) &tgid; 1505 args[0].length = sizeof(tgid); 1506 args[0].fd = -1; 1507 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_RELEASE, 1, 0); 1508 1509 return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1510 sc, &args[0]); 1511 } 1512 1513 static int fastrpc_device_release(struct inode *inode, struct file *file) 1514 { 1515 struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; 1516 struct fastrpc_channel_ctx *cctx = fl->cctx; 1517 struct fastrpc_invoke_ctx *ctx, *n; 1518 struct fastrpc_map *map, *m; 1519 struct fastrpc_buf *buf, *b; 1520 unsigned long flags; 1521 1522 fastrpc_release_current_dsp_process(fl); 1523 1524 spin_lock_irqsave(&cctx->lock, flags); 1525 list_del(&fl->user); 1526 spin_unlock_irqrestore(&cctx->lock, flags); 1527 1528 if (fl->init_mem) 1529 fastrpc_buf_free(fl->init_mem); 1530 1531 list_for_each_entry_safe(ctx, n, &fl->pending, node) { 1532 list_del(&ctx->node); 1533 fastrpc_context_put(ctx); 1534 } 1535 1536 list_for_each_entry_safe(map, m, &fl->maps, node) 1537 fastrpc_map_put(map); 1538 1539 list_for_each_entry_safe(buf, b, &fl->mmaps, node) { 1540 list_del(&buf->node); 1541 fastrpc_buf_free(buf); 1542 } 1543 1544 fastrpc_session_free(cctx, fl->sctx); 1545 fastrpc_channel_ctx_put(cctx); 1546 1547 mutex_destroy(&fl->mutex); 1548 kfree(fl); 1549 file->private_data = NULL; 1550 1551 return 0; 1552 } 1553 1554 static int fastrpc_device_open(struct inode *inode, struct file *filp) 1555 { 1556 struct fastrpc_channel_ctx *cctx; 1557 struct fastrpc_device *fdevice; 1558 struct fastrpc_user *fl = NULL; 1559 unsigned long flags; 1560 1561 fdevice = miscdev_to_fdevice(filp->private_data); 1562 cctx = fdevice->cctx; 1563 1564 fl = kzalloc(sizeof(*fl), GFP_KERNEL); 1565 if (!fl) 1566 return -ENOMEM; 1567 1568 /* Released in fastrpc_device_release() */ 1569 fastrpc_channel_ctx_get(cctx); 1570 1571 filp->private_data = fl; 1572 spin_lock_init(&fl->lock); 1573 mutex_init(&fl->mutex); 1574 INIT_LIST_HEAD(&fl->pending); 1575 INIT_LIST_HEAD(&fl->maps); 1576 INIT_LIST_HEAD(&fl->mmaps); 1577 INIT_LIST_HEAD(&fl->user); 1578 fl->tgid = current->tgid; 1579 fl->cctx = cctx; 1580 fl->is_secure_dev = fdevice->secure; 1581 1582 fl->sctx = fastrpc_session_alloc(cctx); 1583 if (!fl->sctx) { 1584 dev_err(&cctx->rpdev->dev, "No session available\n"); 1585 mutex_destroy(&fl->mutex); 1586 kfree(fl); 1587 1588 return -EBUSY; 1589 } 1590 1591 spin_lock_irqsave(&cctx->lock, flags); 1592 list_add_tail(&fl->user, &cctx->users); 1593 spin_unlock_irqrestore(&cctx->lock, flags); 1594 1595 return 0; 1596 } 1597 1598 static int fastrpc_dmabuf_alloc(struct fastrpc_user *fl, char __user *argp) 1599 { 1600 struct fastrpc_alloc_dma_buf bp; 1601 DEFINE_DMA_BUF_EXPORT_INFO(exp_info); 1602 struct fastrpc_buf *buf = NULL; 1603 int err; 1604 1605 if (copy_from_user(&bp, argp, sizeof(bp))) 1606 return -EFAULT; 1607 1608 err = fastrpc_buf_alloc(fl, fl->sctx->dev, bp.size, &buf); 1609 if (err) 1610 return err; 1611 exp_info.ops = &fastrpc_dma_buf_ops; 1612 exp_info.size = bp.size; 1613 exp_info.flags = O_RDWR; 1614 exp_info.priv = buf; 1615 buf->dmabuf = dma_buf_export(&exp_info); 1616 if (IS_ERR(buf->dmabuf)) { 1617 err = PTR_ERR(buf->dmabuf); 1618 fastrpc_buf_free(buf); 1619 return err; 1620 } 1621 1622 bp.fd = dma_buf_fd(buf->dmabuf, O_ACCMODE); 1623 if (bp.fd < 0) { 1624 dma_buf_put(buf->dmabuf); 1625 return -EINVAL; 1626 } 1627 1628 if (copy_to_user(argp, &bp, sizeof(bp))) { 1629 /* 1630 * The usercopy failed, but we can't do much about it, as 1631 * dma_buf_fd() already called fd_install() and made the 1632 * file descriptor accessible for the current process. It 1633 * might already be closed and dmabuf no longer valid when 1634 * we reach this point. Therefore "leak" the fd and rely on 1635 * the process exit path to do any required cleanup. 1636 */ 1637 return -EFAULT; 1638 } 1639 1640 return 0; 1641 } 1642 1643 static int fastrpc_init_attach(struct fastrpc_user *fl, int pd) 1644 { 1645 struct fastrpc_invoke_args args[1]; 1646 int tgid = fl->tgid; 1647 u32 sc; 1648 1649 args[0].ptr = (u64)(uintptr_t) &tgid; 1650 args[0].length = sizeof(tgid); 1651 args[0].fd = -1; 1652 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_ATTACH, 1, 0); 1653 fl->pd = pd; 1654 1655 return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1656 sc, &args[0]); 1657 } 1658 1659 static int fastrpc_invoke(struct fastrpc_user *fl, char __user *argp) 1660 { 1661 struct fastrpc_invoke_args *args = NULL; 1662 struct fastrpc_invoke inv; 1663 u32 nscalars; 1664 int err; 1665 1666 if (copy_from_user(&inv, argp, sizeof(inv))) 1667 return -EFAULT; 1668 1669 /* nscalars is truncated here to max supported value */ 1670 nscalars = REMOTE_SCALARS_LENGTH(inv.sc); 1671 if (nscalars) { 1672 args = kcalloc(nscalars, sizeof(*args), GFP_KERNEL); 1673 if (!args) 1674 return -ENOMEM; 1675 1676 if (copy_from_user(args, (void __user *)(uintptr_t)inv.args, 1677 nscalars * sizeof(*args))) { 1678 kfree(args); 1679 return -EFAULT; 1680 } 1681 } 1682 1683 err = fastrpc_internal_invoke(fl, false, inv.handle, inv.sc, args); 1684 kfree(args); 1685 1686 return err; 1687 } 1688 1689 static int fastrpc_get_info_from_dsp(struct fastrpc_user *fl, uint32_t *dsp_attr_buf, 1690 uint32_t dsp_attr_buf_len) 1691 { 1692 struct fastrpc_invoke_args args[2] = { 0 }; 1693 1694 /* Capability filled in userspace */ 1695 dsp_attr_buf[0] = 0; 1696 1697 args[0].ptr = (u64)(uintptr_t)&dsp_attr_buf_len; 1698 args[0].length = sizeof(dsp_attr_buf_len); 1699 args[0].fd = -1; 1700 args[1].ptr = (u64)(uintptr_t)&dsp_attr_buf[1]; 1701 args[1].length = dsp_attr_buf_len; 1702 args[1].fd = -1; 1703 fl->pd = USER_PD; 1704 1705 return fastrpc_internal_invoke(fl, true, FASTRPC_DSP_UTILITIES_HANDLE, 1706 FASTRPC_SCALARS(0, 1, 1), args); 1707 } 1708 1709 static int fastrpc_get_info_from_kernel(struct fastrpc_ioctl_capability *cap, 1710 struct fastrpc_user *fl) 1711 { 1712 struct fastrpc_channel_ctx *cctx = fl->cctx; 1713 uint32_t attribute_id = cap->attribute_id; 1714 uint32_t *dsp_attributes; 1715 unsigned long flags; 1716 uint32_t domain = cap->domain; 1717 int err; 1718 1719 spin_lock_irqsave(&cctx->lock, flags); 1720 /* check if we already have queried dsp for attributes */ 1721 if (cctx->valid_attributes) { 1722 spin_unlock_irqrestore(&cctx->lock, flags); 1723 goto done; 1724 } 1725 spin_unlock_irqrestore(&cctx->lock, flags); 1726 1727 dsp_attributes = kzalloc(FASTRPC_MAX_DSP_ATTRIBUTES_LEN, GFP_KERNEL); 1728 if (!dsp_attributes) 1729 return -ENOMEM; 1730 1731 err = fastrpc_get_info_from_dsp(fl, dsp_attributes, FASTRPC_MAX_DSP_ATTRIBUTES_LEN); 1732 if (err == DSP_UNSUPPORTED_API) { 1733 dev_info(&cctx->rpdev->dev, 1734 "Warning: DSP capabilities not supported on domain: %d\n", domain); 1735 kfree(dsp_attributes); 1736 return -EOPNOTSUPP; 1737 } else if (err) { 1738 dev_err(&cctx->rpdev->dev, "Error: dsp information is incorrect err: %d\n", err); 1739 kfree(dsp_attributes); 1740 return err; 1741 } 1742 1743 spin_lock_irqsave(&cctx->lock, flags); 1744 memcpy(cctx->dsp_attributes, dsp_attributes, FASTRPC_MAX_DSP_ATTRIBUTES_LEN); 1745 cctx->valid_attributes = true; 1746 spin_unlock_irqrestore(&cctx->lock, flags); 1747 kfree(dsp_attributes); 1748 done: 1749 cap->capability = cctx->dsp_attributes[attribute_id]; 1750 return 0; 1751 } 1752 1753 static int fastrpc_get_dsp_info(struct fastrpc_user *fl, char __user *argp) 1754 { 1755 struct fastrpc_ioctl_capability cap = {0}; 1756 int err = 0; 1757 1758 if (copy_from_user(&cap, argp, sizeof(cap))) 1759 return -EFAULT; 1760 1761 cap.capability = 0; 1762 if (cap.domain >= FASTRPC_DEV_MAX) { 1763 dev_err(&fl->cctx->rpdev->dev, "Error: Invalid domain id:%d, err:%d\n", 1764 cap.domain, err); 1765 return -ECHRNG; 1766 } 1767 1768 /* Fastrpc Capablities does not support modem domain */ 1769 if (cap.domain == MDSP_DOMAIN_ID) { 1770 dev_err(&fl->cctx->rpdev->dev, "Error: modem not supported %d\n", err); 1771 return -ECHRNG; 1772 } 1773 1774 if (cap.attribute_id >= FASTRPC_MAX_DSP_ATTRIBUTES) { 1775 dev_err(&fl->cctx->rpdev->dev, "Error: invalid attribute: %d, err: %d\n", 1776 cap.attribute_id, err); 1777 return -EOVERFLOW; 1778 } 1779 1780 err = fastrpc_get_info_from_kernel(&cap, fl); 1781 if (err) 1782 return err; 1783 1784 if (copy_to_user(argp, &cap.capability, sizeof(cap.capability))) 1785 return -EFAULT; 1786 1787 return 0; 1788 } 1789 1790 static int fastrpc_req_munmap_impl(struct fastrpc_user *fl, struct fastrpc_buf *buf) 1791 { 1792 struct fastrpc_invoke_args args[1] = { [0] = { 0 } }; 1793 struct fastrpc_munmap_req_msg req_msg; 1794 struct device *dev = fl->sctx->dev; 1795 int err; 1796 u32 sc; 1797 1798 req_msg.pgid = fl->tgid; 1799 req_msg.size = buf->size; 1800 req_msg.vaddr = buf->raddr; 1801 1802 args[0].ptr = (u64) (uintptr_t) &req_msg; 1803 args[0].length = sizeof(req_msg); 1804 1805 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MUNMAP, 1, 0); 1806 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, 1807 &args[0]); 1808 if (!err) { 1809 dev_dbg(dev, "unmmap\tpt 0x%09lx OK\n", buf->raddr); 1810 spin_lock(&fl->lock); 1811 list_del(&buf->node); 1812 spin_unlock(&fl->lock); 1813 fastrpc_buf_free(buf); 1814 } else { 1815 dev_err(dev, "unmmap\tpt 0x%09lx ERROR\n", buf->raddr); 1816 } 1817 1818 return err; 1819 } 1820 1821 static int fastrpc_req_munmap(struct fastrpc_user *fl, char __user *argp) 1822 { 1823 struct fastrpc_buf *buf = NULL, *iter, *b; 1824 struct fastrpc_req_munmap req; 1825 struct device *dev = fl->sctx->dev; 1826 1827 if (copy_from_user(&req, argp, sizeof(req))) 1828 return -EFAULT; 1829 1830 spin_lock(&fl->lock); 1831 list_for_each_entry_safe(iter, b, &fl->mmaps, node) { 1832 if ((iter->raddr == req.vaddrout) && (iter->size == req.size)) { 1833 buf = iter; 1834 break; 1835 } 1836 } 1837 spin_unlock(&fl->lock); 1838 1839 if (!buf) { 1840 dev_err(dev, "mmap\t\tpt 0x%09llx [len 0x%08llx] not in list\n", 1841 req.vaddrout, req.size); 1842 return -EINVAL; 1843 } 1844 1845 return fastrpc_req_munmap_impl(fl, buf); 1846 } 1847 1848 static int fastrpc_req_mmap(struct fastrpc_user *fl, char __user *argp) 1849 { 1850 struct fastrpc_invoke_args args[3] = { [0 ... 2] = { 0 } }; 1851 struct fastrpc_buf *buf = NULL; 1852 struct fastrpc_mmap_req_msg req_msg; 1853 struct fastrpc_mmap_rsp_msg rsp_msg; 1854 struct fastrpc_phy_page pages; 1855 struct fastrpc_req_mmap req; 1856 struct device *dev = fl->sctx->dev; 1857 int err; 1858 u32 sc; 1859 1860 if (copy_from_user(&req, argp, sizeof(req))) 1861 return -EFAULT; 1862 1863 if (req.flags != ADSP_MMAP_ADD_PAGES && req.flags != ADSP_MMAP_REMOTE_HEAP_ADDR) { 1864 dev_err(dev, "flag not supported 0x%x\n", req.flags); 1865 1866 return -EINVAL; 1867 } 1868 1869 if (req.vaddrin) { 1870 dev_err(dev, "adding user allocated pages is not supported\n"); 1871 return -EINVAL; 1872 } 1873 1874 if (req.flags == ADSP_MMAP_REMOTE_HEAP_ADDR) 1875 err = fastrpc_remote_heap_alloc(fl, dev, req.size, &buf); 1876 else 1877 err = fastrpc_buf_alloc(fl, dev, req.size, &buf); 1878 1879 if (err) { 1880 dev_err(dev, "failed to allocate buffer\n"); 1881 return err; 1882 } 1883 1884 req_msg.pgid = fl->tgid; 1885 req_msg.flags = req.flags; 1886 req_msg.vaddr = req.vaddrin; 1887 req_msg.num = sizeof(pages); 1888 1889 args[0].ptr = (u64) (uintptr_t) &req_msg; 1890 args[0].length = sizeof(req_msg); 1891 1892 pages.addr = buf->phys; 1893 pages.size = buf->size; 1894 1895 args[1].ptr = (u64) (uintptr_t) &pages; 1896 args[1].length = sizeof(pages); 1897 1898 args[2].ptr = (u64) (uintptr_t) &rsp_msg; 1899 args[2].length = sizeof(rsp_msg); 1900 1901 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MMAP, 2, 1); 1902 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, 1903 &args[0]); 1904 if (err) { 1905 dev_err(dev, "mmap error (len 0x%08llx)\n", buf->size); 1906 goto err_invoke; 1907 } 1908 1909 /* update the buffer to be able to deallocate the memory on the DSP */ 1910 buf->raddr = (uintptr_t) rsp_msg.vaddr; 1911 1912 /* let the client know the address to use */ 1913 req.vaddrout = rsp_msg.vaddr; 1914 1915 /* Add memory to static PD pool, protection thru hypervisor */ 1916 if (req.flags == ADSP_MMAP_REMOTE_HEAP_ADDR && fl->cctx->vmcount) { 1917 u64 src_perms = BIT(QCOM_SCM_VMID_HLOS); 1918 1919 err = qcom_scm_assign_mem(buf->phys, (u64)buf->size, 1920 &src_perms, fl->cctx->vmperms, fl->cctx->vmcount); 1921 if (err) { 1922 dev_err(fl->sctx->dev, "Failed to assign memory phys 0x%llx size 0x%llx err %d", 1923 buf->phys, buf->size, err); 1924 goto err_assign; 1925 } 1926 } 1927 1928 spin_lock(&fl->lock); 1929 list_add_tail(&buf->node, &fl->mmaps); 1930 spin_unlock(&fl->lock); 1931 1932 if (copy_to_user((void __user *)argp, &req, sizeof(req))) { 1933 err = -EFAULT; 1934 goto err_assign; 1935 } 1936 1937 dev_dbg(dev, "mmap\t\tpt 0x%09lx OK [len 0x%08llx]\n", 1938 buf->raddr, buf->size); 1939 1940 return 0; 1941 1942 err_assign: 1943 fastrpc_req_munmap_impl(fl, buf); 1944 err_invoke: 1945 fastrpc_buf_free(buf); 1946 1947 return err; 1948 } 1949 1950 static int fastrpc_req_mem_unmap_impl(struct fastrpc_user *fl, struct fastrpc_mem_unmap *req) 1951 { 1952 struct fastrpc_invoke_args args[1] = { [0] = { 0 } }; 1953 struct fastrpc_map *map = NULL, *iter, *m; 1954 struct fastrpc_mem_unmap_req_msg req_msg = { 0 }; 1955 int err = 0; 1956 u32 sc; 1957 struct device *dev = fl->sctx->dev; 1958 1959 spin_lock(&fl->lock); 1960 list_for_each_entry_safe(iter, m, &fl->maps, node) { 1961 if ((req->fd < 0 || iter->fd == req->fd) && (iter->raddr == req->vaddr)) { 1962 map = iter; 1963 break; 1964 } 1965 } 1966 1967 spin_unlock(&fl->lock); 1968 1969 if (!map) { 1970 dev_err(dev, "map not in list\n"); 1971 return -EINVAL; 1972 } 1973 1974 req_msg.pgid = fl->tgid; 1975 req_msg.len = map->len; 1976 req_msg.vaddrin = map->raddr; 1977 req_msg.fd = map->fd; 1978 1979 args[0].ptr = (u64) (uintptr_t) &req_msg; 1980 args[0].length = sizeof(req_msg); 1981 1982 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MEM_UNMAP, 1, 0); 1983 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, 1984 &args[0]); 1985 if (err) { 1986 dev_err(dev, "unmmap\tpt fd = %d, 0x%09llx error\n", map->fd, map->raddr); 1987 return err; 1988 } 1989 fastrpc_map_put(map); 1990 1991 return 0; 1992 } 1993 1994 static int fastrpc_req_mem_unmap(struct fastrpc_user *fl, char __user *argp) 1995 { 1996 struct fastrpc_mem_unmap req; 1997 1998 if (copy_from_user(&req, argp, sizeof(req))) 1999 return -EFAULT; 2000 2001 return fastrpc_req_mem_unmap_impl(fl, &req); 2002 } 2003 2004 static int fastrpc_req_mem_map(struct fastrpc_user *fl, char __user *argp) 2005 { 2006 struct fastrpc_invoke_args args[4] = { [0 ... 3] = { 0 } }; 2007 struct fastrpc_mem_map_req_msg req_msg = { 0 }; 2008 struct fastrpc_mmap_rsp_msg rsp_msg = { 0 }; 2009 struct fastrpc_mem_unmap req_unmap = { 0 }; 2010 struct fastrpc_phy_page pages = { 0 }; 2011 struct fastrpc_mem_map req; 2012 struct device *dev = fl->sctx->dev; 2013 struct fastrpc_map *map = NULL; 2014 int err; 2015 u32 sc; 2016 2017 if (copy_from_user(&req, argp, sizeof(req))) 2018 return -EFAULT; 2019 2020 /* create SMMU mapping */ 2021 err = fastrpc_map_create(fl, req.fd, req.length, 0, &map); 2022 if (err) { 2023 dev_err(dev, "failed to map buffer, fd = %d\n", req.fd); 2024 return err; 2025 } 2026 2027 req_msg.pgid = fl->tgid; 2028 req_msg.fd = req.fd; 2029 req_msg.offset = req.offset; 2030 req_msg.vaddrin = req.vaddrin; 2031 map->va = (void *) (uintptr_t) req.vaddrin; 2032 req_msg.flags = req.flags; 2033 req_msg.num = sizeof(pages); 2034 req_msg.data_len = 0; 2035 2036 args[0].ptr = (u64) (uintptr_t) &req_msg; 2037 args[0].length = sizeof(req_msg); 2038 2039 pages.addr = map->phys; 2040 pages.size = map->size; 2041 2042 args[1].ptr = (u64) (uintptr_t) &pages; 2043 args[1].length = sizeof(pages); 2044 2045 args[2].ptr = (u64) (uintptr_t) &pages; 2046 args[2].length = 0; 2047 2048 args[3].ptr = (u64) (uintptr_t) &rsp_msg; 2049 args[3].length = sizeof(rsp_msg); 2050 2051 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MEM_MAP, 3, 1); 2052 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, &args[0]); 2053 if (err) { 2054 dev_err(dev, "mem mmap error, fd %d, vaddr %llx, size %lld\n", 2055 req.fd, req.vaddrin, map->size); 2056 goto err_invoke; 2057 } 2058 2059 /* update the buffer to be able to deallocate the memory on the DSP */ 2060 map->raddr = rsp_msg.vaddr; 2061 2062 /* let the client know the address to use */ 2063 req.vaddrout = rsp_msg.vaddr; 2064 2065 if (copy_to_user((void __user *)argp, &req, sizeof(req))) { 2066 /* unmap the memory and release the buffer */ 2067 req_unmap.vaddr = (uintptr_t) rsp_msg.vaddr; 2068 req_unmap.length = map->size; 2069 fastrpc_req_mem_unmap_impl(fl, &req_unmap); 2070 return -EFAULT; 2071 } 2072 2073 return 0; 2074 2075 err_invoke: 2076 fastrpc_map_put(map); 2077 2078 return err; 2079 } 2080 2081 static long fastrpc_device_ioctl(struct file *file, unsigned int cmd, 2082 unsigned long arg) 2083 { 2084 struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; 2085 char __user *argp = (char __user *)arg; 2086 int err; 2087 2088 switch (cmd) { 2089 case FASTRPC_IOCTL_INVOKE: 2090 err = fastrpc_invoke(fl, argp); 2091 break; 2092 case FASTRPC_IOCTL_INIT_ATTACH: 2093 err = fastrpc_init_attach(fl, ROOT_PD); 2094 break; 2095 case FASTRPC_IOCTL_INIT_ATTACH_SNS: 2096 err = fastrpc_init_attach(fl, SENSORS_PD); 2097 break; 2098 case FASTRPC_IOCTL_INIT_CREATE_STATIC: 2099 err = fastrpc_init_create_static_process(fl, argp); 2100 break; 2101 case FASTRPC_IOCTL_INIT_CREATE: 2102 err = fastrpc_init_create_process(fl, argp); 2103 break; 2104 case FASTRPC_IOCTL_ALLOC_DMA_BUFF: 2105 err = fastrpc_dmabuf_alloc(fl, argp); 2106 break; 2107 case FASTRPC_IOCTL_MMAP: 2108 err = fastrpc_req_mmap(fl, argp); 2109 break; 2110 case FASTRPC_IOCTL_MUNMAP: 2111 err = fastrpc_req_munmap(fl, argp); 2112 break; 2113 case FASTRPC_IOCTL_MEM_MAP: 2114 err = fastrpc_req_mem_map(fl, argp); 2115 break; 2116 case FASTRPC_IOCTL_MEM_UNMAP: 2117 err = fastrpc_req_mem_unmap(fl, argp); 2118 break; 2119 case FASTRPC_IOCTL_GET_DSP_INFO: 2120 err = fastrpc_get_dsp_info(fl, argp); 2121 break; 2122 default: 2123 err = -ENOTTY; 2124 break; 2125 } 2126 2127 return err; 2128 } 2129 2130 static const struct file_operations fastrpc_fops = { 2131 .open = fastrpc_device_open, 2132 .release = fastrpc_device_release, 2133 .unlocked_ioctl = fastrpc_device_ioctl, 2134 .compat_ioctl = fastrpc_device_ioctl, 2135 }; 2136 2137 static int fastrpc_cb_probe(struct platform_device *pdev) 2138 { 2139 struct fastrpc_channel_ctx *cctx; 2140 struct fastrpc_session_ctx *sess; 2141 struct device *dev = &pdev->dev; 2142 int i, sessions = 0; 2143 unsigned long flags; 2144 int rc; 2145 2146 cctx = dev_get_drvdata(dev->parent); 2147 if (!cctx) 2148 return -EINVAL; 2149 2150 of_property_read_u32(dev->of_node, "qcom,nsessions", &sessions); 2151 2152 spin_lock_irqsave(&cctx->lock, flags); 2153 if (cctx->sesscount >= FASTRPC_MAX_SESSIONS) { 2154 dev_err(&pdev->dev, "too many sessions\n"); 2155 spin_unlock_irqrestore(&cctx->lock, flags); 2156 return -ENOSPC; 2157 } 2158 sess = &cctx->session[cctx->sesscount++]; 2159 sess->used = false; 2160 sess->valid = true; 2161 sess->dev = dev; 2162 dev_set_drvdata(dev, sess); 2163 2164 if (of_property_read_u32(dev->of_node, "reg", &sess->sid)) 2165 dev_info(dev, "FastRPC Session ID not specified in DT\n"); 2166 2167 if (sessions > 0) { 2168 struct fastrpc_session_ctx *dup_sess; 2169 2170 for (i = 1; i < sessions; i++) { 2171 if (cctx->sesscount >= FASTRPC_MAX_SESSIONS) 2172 break; 2173 dup_sess = &cctx->session[cctx->sesscount++]; 2174 memcpy(dup_sess, sess, sizeof(*dup_sess)); 2175 } 2176 } 2177 spin_unlock_irqrestore(&cctx->lock, flags); 2178 rc = dma_set_mask(dev, DMA_BIT_MASK(32)); 2179 if (rc) { 2180 dev_err(dev, "32-bit DMA enable failed\n"); 2181 return rc; 2182 } 2183 2184 return 0; 2185 } 2186 2187 static void fastrpc_cb_remove(struct platform_device *pdev) 2188 { 2189 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(pdev->dev.parent); 2190 struct fastrpc_session_ctx *sess = dev_get_drvdata(&pdev->dev); 2191 unsigned long flags; 2192 int i; 2193 2194 spin_lock_irqsave(&cctx->lock, flags); 2195 for (i = 0; i < FASTRPC_MAX_SESSIONS; i++) { 2196 if (cctx->session[i].sid == sess->sid) { 2197 cctx->session[i].valid = false; 2198 cctx->sesscount--; 2199 } 2200 } 2201 spin_unlock_irqrestore(&cctx->lock, flags); 2202 } 2203 2204 static const struct of_device_id fastrpc_match_table[] = { 2205 { .compatible = "qcom,fastrpc-compute-cb", }, 2206 {} 2207 }; 2208 2209 static struct platform_driver fastrpc_cb_driver = { 2210 .probe = fastrpc_cb_probe, 2211 .remove_new = fastrpc_cb_remove, 2212 .driver = { 2213 .name = "qcom,fastrpc-cb", 2214 .of_match_table = fastrpc_match_table, 2215 .suppress_bind_attrs = true, 2216 }, 2217 }; 2218 2219 static int fastrpc_device_register(struct device *dev, struct fastrpc_channel_ctx *cctx, 2220 bool is_secured, const char *domain) 2221 { 2222 struct fastrpc_device *fdev; 2223 int err; 2224 2225 fdev = devm_kzalloc(dev, sizeof(*fdev), GFP_KERNEL); 2226 if (!fdev) 2227 return -ENOMEM; 2228 2229 fdev->secure = is_secured; 2230 fdev->cctx = cctx; 2231 fdev->miscdev.minor = MISC_DYNAMIC_MINOR; 2232 fdev->miscdev.fops = &fastrpc_fops; 2233 fdev->miscdev.name = devm_kasprintf(dev, GFP_KERNEL, "fastrpc-%s%s", 2234 domain, is_secured ? "-secure" : ""); 2235 if (!fdev->miscdev.name) 2236 return -ENOMEM; 2237 2238 err = misc_register(&fdev->miscdev); 2239 if (!err) { 2240 if (is_secured) 2241 cctx->secure_fdevice = fdev; 2242 else 2243 cctx->fdevice = fdev; 2244 } 2245 2246 return err; 2247 } 2248 2249 static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev) 2250 { 2251 struct device *rdev = &rpdev->dev; 2252 struct fastrpc_channel_ctx *data; 2253 int i, err, domain_id = -1, vmcount; 2254 const char *domain; 2255 bool secure_dsp; 2256 struct device_node *rmem_node; 2257 struct reserved_mem *rmem; 2258 unsigned int vmids[FASTRPC_MAX_VMIDS]; 2259 2260 err = of_property_read_string(rdev->of_node, "label", &domain); 2261 if (err) { 2262 dev_info(rdev, "FastRPC Domain not specified in DT\n"); 2263 return err; 2264 } 2265 2266 for (i = 0; i <= CDSP_DOMAIN_ID; i++) { 2267 if (!strcmp(domains[i], domain)) { 2268 domain_id = i; 2269 break; 2270 } 2271 } 2272 2273 if (domain_id < 0) { 2274 dev_info(rdev, "FastRPC Invalid Domain ID %d\n", domain_id); 2275 return -EINVAL; 2276 } 2277 2278 if (of_reserved_mem_device_init_by_idx(rdev, rdev->of_node, 0)) 2279 dev_info(rdev, "no reserved DMA memory for FASTRPC\n"); 2280 2281 vmcount = of_property_read_variable_u32_array(rdev->of_node, 2282 "qcom,vmids", &vmids[0], 0, FASTRPC_MAX_VMIDS); 2283 if (vmcount < 0) 2284 vmcount = 0; 2285 else if (!qcom_scm_is_available()) 2286 return -EPROBE_DEFER; 2287 2288 data = kzalloc(sizeof(*data), GFP_KERNEL); 2289 if (!data) 2290 return -ENOMEM; 2291 2292 if (vmcount) { 2293 data->vmcount = vmcount; 2294 for (i = 0; i < data->vmcount; i++) { 2295 data->vmperms[i].vmid = vmids[i]; 2296 data->vmperms[i].perm = QCOM_SCM_PERM_RWX; 2297 } 2298 } 2299 2300 rmem_node = of_parse_phandle(rdev->of_node, "memory-region", 0); 2301 if (domain_id == SDSP_DOMAIN_ID && rmem_node) { 2302 u64 src_perms; 2303 2304 rmem = of_reserved_mem_lookup(rmem_node); 2305 if (!rmem) { 2306 err = -EINVAL; 2307 goto fdev_error; 2308 } 2309 2310 src_perms = BIT(QCOM_SCM_VMID_HLOS); 2311 2312 qcom_scm_assign_mem(rmem->base, rmem->size, &src_perms, 2313 data->vmperms, data->vmcount); 2314 2315 } 2316 2317 secure_dsp = !(of_property_read_bool(rdev->of_node, "qcom,non-secure-domain")); 2318 data->secure = secure_dsp; 2319 2320 switch (domain_id) { 2321 case ADSP_DOMAIN_ID: 2322 case MDSP_DOMAIN_ID: 2323 case SDSP_DOMAIN_ID: 2324 /* Unsigned PD offloading is only supported on CDSP*/ 2325 data->unsigned_support = false; 2326 err = fastrpc_device_register(rdev, data, secure_dsp, domains[domain_id]); 2327 if (err) 2328 goto fdev_error; 2329 break; 2330 case CDSP_DOMAIN_ID: 2331 data->unsigned_support = true; 2332 /* Create both device nodes so that we can allow both Signed and Unsigned PD */ 2333 err = fastrpc_device_register(rdev, data, true, domains[domain_id]); 2334 if (err) 2335 goto fdev_error; 2336 2337 err = fastrpc_device_register(rdev, data, false, domains[domain_id]); 2338 if (err) 2339 goto fdev_error; 2340 break; 2341 default: 2342 err = -EINVAL; 2343 goto fdev_error; 2344 } 2345 2346 kref_init(&data->refcount); 2347 2348 dev_set_drvdata(&rpdev->dev, data); 2349 rdev->dma_mask = &data->dma_mask; 2350 dma_set_mask_and_coherent(rdev, DMA_BIT_MASK(32)); 2351 INIT_LIST_HEAD(&data->users); 2352 INIT_LIST_HEAD(&data->invoke_interrupted_mmaps); 2353 spin_lock_init(&data->lock); 2354 idr_init(&data->ctx_idr); 2355 data->domain_id = domain_id; 2356 data->rpdev = rpdev; 2357 2358 err = of_platform_populate(rdev->of_node, NULL, NULL, rdev); 2359 if (err) 2360 goto populate_error; 2361 2362 return 0; 2363 2364 populate_error: 2365 if (data->fdevice) 2366 misc_deregister(&data->fdevice->miscdev); 2367 if (data->secure_fdevice) 2368 misc_deregister(&data->secure_fdevice->miscdev); 2369 2370 fdev_error: 2371 kfree(data); 2372 return err; 2373 } 2374 2375 static void fastrpc_notify_users(struct fastrpc_user *user) 2376 { 2377 struct fastrpc_invoke_ctx *ctx; 2378 2379 spin_lock(&user->lock); 2380 list_for_each_entry(ctx, &user->pending, node) { 2381 ctx->retval = -EPIPE; 2382 complete(&ctx->work); 2383 } 2384 spin_unlock(&user->lock); 2385 } 2386 2387 static void fastrpc_rpmsg_remove(struct rpmsg_device *rpdev) 2388 { 2389 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); 2390 struct fastrpc_buf *buf, *b; 2391 struct fastrpc_user *user; 2392 unsigned long flags; 2393 2394 /* No invocations past this point */ 2395 spin_lock_irqsave(&cctx->lock, flags); 2396 cctx->rpdev = NULL; 2397 list_for_each_entry(user, &cctx->users, user) 2398 fastrpc_notify_users(user); 2399 spin_unlock_irqrestore(&cctx->lock, flags); 2400 2401 if (cctx->fdevice) 2402 misc_deregister(&cctx->fdevice->miscdev); 2403 2404 if (cctx->secure_fdevice) 2405 misc_deregister(&cctx->secure_fdevice->miscdev); 2406 2407 list_for_each_entry_safe(buf, b, &cctx->invoke_interrupted_mmaps, node) 2408 list_del(&buf->node); 2409 2410 if (cctx->remote_heap) 2411 fastrpc_buf_free(cctx->remote_heap); 2412 2413 of_platform_depopulate(&rpdev->dev); 2414 2415 fastrpc_channel_ctx_put(cctx); 2416 } 2417 2418 static int fastrpc_rpmsg_callback(struct rpmsg_device *rpdev, void *data, 2419 int len, void *priv, u32 addr) 2420 { 2421 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); 2422 struct fastrpc_invoke_rsp *rsp = data; 2423 struct fastrpc_invoke_ctx *ctx; 2424 unsigned long flags; 2425 unsigned long ctxid; 2426 2427 if (len < sizeof(*rsp)) 2428 return -EINVAL; 2429 2430 ctxid = ((rsp->ctx & FASTRPC_CTXID_MASK) >> 4); 2431 2432 spin_lock_irqsave(&cctx->lock, flags); 2433 ctx = idr_find(&cctx->ctx_idr, ctxid); 2434 spin_unlock_irqrestore(&cctx->lock, flags); 2435 2436 if (!ctx) { 2437 dev_err(&rpdev->dev, "No context ID matches response\n"); 2438 return -ENOENT; 2439 } 2440 2441 ctx->retval = rsp->retval; 2442 complete(&ctx->work); 2443 2444 /* 2445 * The DMA buffer associated with the context cannot be freed in 2446 * interrupt context so schedule it through a worker thread to 2447 * avoid a kernel BUG. 2448 */ 2449 schedule_work(&ctx->put_work); 2450 2451 return 0; 2452 } 2453 2454 static const struct of_device_id fastrpc_rpmsg_of_match[] = { 2455 { .compatible = "qcom,fastrpc" }, 2456 { }, 2457 }; 2458 MODULE_DEVICE_TABLE(of, fastrpc_rpmsg_of_match); 2459 2460 static struct rpmsg_driver fastrpc_driver = { 2461 .probe = fastrpc_rpmsg_probe, 2462 .remove = fastrpc_rpmsg_remove, 2463 .callback = fastrpc_rpmsg_callback, 2464 .drv = { 2465 .name = "qcom,fastrpc", 2466 .of_match_table = fastrpc_rpmsg_of_match, 2467 }, 2468 }; 2469 2470 static int fastrpc_init(void) 2471 { 2472 int ret; 2473 2474 ret = platform_driver_register(&fastrpc_cb_driver); 2475 if (ret < 0) { 2476 pr_err("fastrpc: failed to register cb driver\n"); 2477 return ret; 2478 } 2479 2480 ret = register_rpmsg_driver(&fastrpc_driver); 2481 if (ret < 0) { 2482 pr_err("fastrpc: failed to register rpmsg driver\n"); 2483 platform_driver_unregister(&fastrpc_cb_driver); 2484 return ret; 2485 } 2486 2487 return 0; 2488 } 2489 module_init(fastrpc_init); 2490 2491 static void fastrpc_exit(void) 2492 { 2493 platform_driver_unregister(&fastrpc_cb_driver); 2494 unregister_rpmsg_driver(&fastrpc_driver); 2495 } 2496 module_exit(fastrpc_exit); 2497 2498 MODULE_DESCRIPTION("Qualcomm FastRPC"); 2499 MODULE_LICENSE("GPL v2"); 2500 MODULE_IMPORT_NS(DMA_BUF); 2501