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