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 CDSP1_DOMAIN_ID (4) 31 #define FASTRPC_DEV_MAX 5 /* adsp, mdsp, slpi, cdsp, cdsp1 */ 32 #define FASTRPC_MAX_SESSIONS 14 33 #define FASTRPC_MAX_VMIDS 16 34 #define FASTRPC_ALIGN 128 35 #define FASTRPC_MAX_FDLIST 16 36 #define FASTRPC_MAX_CRCLIST 64 37 #define FASTRPC_PHYS(p) ((p) & 0xffffffff) 38 #define FASTRPC_CTX_MAX (256) 39 #define FASTRPC_INIT_HANDLE 1 40 #define FASTRPC_DSP_UTILITIES_HANDLE 2 41 #define FASTRPC_CTXID_MASK (0xFF0) 42 #define INIT_FILELEN_MAX (2 * 1024 * 1024) 43 #define INIT_FILE_NAMELEN_MAX (128) 44 #define FASTRPC_DEVICE_NAME "fastrpc" 45 46 /* Add memory to static PD pool, protection thru XPU */ 47 #define ADSP_MMAP_HEAP_ADDR 4 48 /* MAP static DMA buffer on DSP User PD */ 49 #define ADSP_MMAP_DMA_BUFFER 6 50 /* Add memory to static PD pool protection thru hypervisor */ 51 #define ADSP_MMAP_REMOTE_HEAP_ADDR 8 52 /* Add memory to userPD pool, for user heap */ 53 #define ADSP_MMAP_ADD_PAGES 0x1000 54 /* Add memory to userPD pool, for LLC heap */ 55 #define ADSP_MMAP_ADD_PAGES_LLC 0x3000, 56 57 #define DSP_UNSUPPORTED_API (0x80000414) 58 /* MAX NUMBER of DSP ATTRIBUTES SUPPORTED */ 59 #define FASTRPC_MAX_DSP_ATTRIBUTES (256) 60 #define FASTRPC_MAX_DSP_ATTRIBUTES_LEN (sizeof(u32) * FASTRPC_MAX_DSP_ATTRIBUTES) 61 62 /* Retrives number of input buffers from the scalars parameter */ 63 #define REMOTE_SCALARS_INBUFS(sc) (((sc) >> 16) & 0x0ff) 64 65 /* Retrives number of output buffers from the scalars parameter */ 66 #define REMOTE_SCALARS_OUTBUFS(sc) (((sc) >> 8) & 0x0ff) 67 68 /* Retrives number of input handles from the scalars parameter */ 69 #define REMOTE_SCALARS_INHANDLES(sc) (((sc) >> 4) & 0x0f) 70 71 /* Retrives number of output handles from the scalars parameter */ 72 #define REMOTE_SCALARS_OUTHANDLES(sc) ((sc) & 0x0f) 73 74 #define REMOTE_SCALARS_LENGTH(sc) (REMOTE_SCALARS_INBUFS(sc) + \ 75 REMOTE_SCALARS_OUTBUFS(sc) + \ 76 REMOTE_SCALARS_INHANDLES(sc)+ \ 77 REMOTE_SCALARS_OUTHANDLES(sc)) 78 #define FASTRPC_BUILD_SCALARS(attr, method, in, out, oin, oout) \ 79 (((attr & 0x07) << 29) | \ 80 ((method & 0x1f) << 24) | \ 81 ((in & 0xff) << 16) | \ 82 ((out & 0xff) << 8) | \ 83 ((oin & 0x0f) << 4) | \ 84 (oout & 0x0f)) 85 86 #define FASTRPC_SCALARS(method, in, out) \ 87 FASTRPC_BUILD_SCALARS(0, method, in, out, 0, 0) 88 89 #define FASTRPC_CREATE_PROCESS_NARGS 6 90 #define FASTRPC_CREATE_STATIC_PROCESS_NARGS 3 91 /* Remote Method id table */ 92 #define FASTRPC_RMID_INIT_ATTACH 0 93 #define FASTRPC_RMID_INIT_RELEASE 1 94 #define FASTRPC_RMID_INIT_MMAP 4 95 #define FASTRPC_RMID_INIT_MUNMAP 5 96 #define FASTRPC_RMID_INIT_CREATE 6 97 #define FASTRPC_RMID_INIT_CREATE_ATTR 7 98 #define FASTRPC_RMID_INIT_CREATE_STATIC 8 99 #define FASTRPC_RMID_INIT_MEM_MAP 10 100 #define FASTRPC_RMID_INIT_MEM_UNMAP 11 101 102 /* Protection Domain(PD) ids */ 103 #define ROOT_PD (0) 104 #define USER_PD (1) 105 #define SENSORS_PD (2) 106 107 #define miscdev_to_fdevice(d) container_of(d, struct fastrpc_device, miscdev) 108 109 static const char *domains[FASTRPC_DEV_MAX] = { "adsp", "mdsp", 110 "sdsp", "cdsp", "cdsp1" }; 111 struct fastrpc_phy_page { 112 u64 addr; /* physical address */ 113 u64 size; /* size of contiguous region */ 114 }; 115 116 struct fastrpc_invoke_buf { 117 u32 num; /* number of contiguous regions */ 118 u32 pgidx; /* index to start of contiguous region */ 119 }; 120 121 struct fastrpc_remote_dmahandle { 122 s32 fd; /* dma handle fd */ 123 u32 offset; /* dma handle offset */ 124 u32 len; /* dma handle length */ 125 }; 126 127 struct fastrpc_remote_buf { 128 u64 pv; /* buffer pointer */ 129 u64 len; /* length of buffer */ 130 }; 131 132 union fastrpc_remote_arg { 133 struct fastrpc_remote_buf buf; 134 struct fastrpc_remote_dmahandle dma; 135 }; 136 137 struct fastrpc_mmap_rsp_msg { 138 u64 vaddr; 139 }; 140 141 struct fastrpc_mmap_req_msg { 142 s32 client_id; 143 u32 flags; 144 u64 vaddr; 145 s32 num; 146 }; 147 148 struct fastrpc_mem_map_req_msg { 149 s32 client_id; 150 s32 fd; 151 s32 offset; 152 u32 flags; 153 u64 vaddrin; 154 s32 num; 155 s32 data_len; 156 }; 157 158 struct fastrpc_munmap_req_msg { 159 s32 client_id; 160 u64 vaddr; 161 u64 size; 162 }; 163 164 struct fastrpc_mem_unmap_req_msg { 165 s32 client_id; 166 s32 fd; 167 u64 vaddrin; 168 u64 len; 169 }; 170 171 struct fastrpc_msg { 172 int client_id; /* process client id */ 173 int tid; /* thread id */ 174 u64 ctx; /* invoke caller context */ 175 u32 handle; /* handle to invoke */ 176 u32 sc; /* scalars structure describing the data */ 177 u64 addr; /* physical address */ 178 u64 size; /* size of contiguous region */ 179 }; 180 181 struct fastrpc_invoke_rsp { 182 u64 ctx; /* invoke caller context */ 183 int retval; /* invoke return value */ 184 }; 185 186 struct fastrpc_buf_overlap { 187 u64 start; 188 u64 end; 189 int raix; 190 u64 mstart; 191 u64 mend; 192 u64 offset; 193 }; 194 195 struct fastrpc_buf { 196 struct fastrpc_user *fl; 197 struct dma_buf *dmabuf; 198 struct device *dev; 199 void *virt; 200 u64 phys; 201 u64 size; 202 /* Lock for dma buf attachments */ 203 struct mutex lock; 204 struct list_head attachments; 205 /* mmap support */ 206 struct list_head node; /* list of user requested mmaps */ 207 uintptr_t raddr; 208 }; 209 210 struct fastrpc_dma_buf_attachment { 211 struct device *dev; 212 struct sg_table sgt; 213 struct list_head node; 214 }; 215 216 struct fastrpc_map { 217 struct list_head node; 218 struct fastrpc_user *fl; 219 int fd; 220 struct dma_buf *buf; 221 struct sg_table *table; 222 struct dma_buf_attachment *attach; 223 u64 phys; 224 u64 size; 225 void *va; 226 u64 len; 227 u64 raddr; 228 u32 attr; 229 struct kref refcount; 230 }; 231 232 struct fastrpc_invoke_ctx { 233 int nscalars; 234 int nbufs; 235 int retval; 236 int pid; 237 int client_id; 238 u32 sc; 239 u32 *crc; 240 u64 ctxid; 241 u64 msg_sz; 242 struct kref refcount; 243 struct list_head node; /* list of ctxs */ 244 struct completion work; 245 struct work_struct put_work; 246 struct fastrpc_msg msg; 247 struct fastrpc_user *fl; 248 union fastrpc_remote_arg *rpra; 249 struct fastrpc_map **maps; 250 struct fastrpc_buf *buf; 251 struct fastrpc_invoke_args *args; 252 struct fastrpc_buf_overlap *olaps; 253 struct fastrpc_channel_ctx *cctx; 254 }; 255 256 struct fastrpc_session_ctx { 257 struct device *dev; 258 int sid; 259 bool used; 260 bool valid; 261 }; 262 263 struct fastrpc_channel_ctx { 264 int domain_id; 265 int sesscount; 266 int vmcount; 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 client_id; 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\n", 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->client_id = user->client_id; 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\n", 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 if (ctx->fl->sctx->sid) 958 err = fastrpc_buf_alloc(ctx->fl, dev, pkt_size, &ctx->buf); 959 else 960 err = fastrpc_remote_heap_alloc(ctx->fl, dev, pkt_size, &ctx->buf); 961 if (err) 962 return err; 963 964 memset(ctx->buf->virt, 0, pkt_size); 965 rpra = ctx->buf->virt; 966 list = fastrpc_invoke_buf_start(rpra, ctx->nscalars); 967 pages = fastrpc_phy_page_start(list, ctx->nscalars); 968 args = (uintptr_t)ctx->buf->virt + metalen; 969 rlen = pkt_size - metalen; 970 ctx->rpra = rpra; 971 972 for (oix = 0; oix < ctx->nbufs; ++oix) { 973 int mlen; 974 975 i = ctx->olaps[oix].raix; 976 len = ctx->args[i].length; 977 978 rpra[i].buf.pv = 0; 979 rpra[i].buf.len = len; 980 list[i].num = len ? 1 : 0; 981 list[i].pgidx = i; 982 983 if (!len) 984 continue; 985 986 if (ctx->maps[i]) { 987 struct vm_area_struct *vma = NULL; 988 989 rpra[i].buf.pv = (u64) ctx->args[i].ptr; 990 pages[i].addr = ctx->maps[i]->phys; 991 992 mmap_read_lock(current->mm); 993 vma = find_vma(current->mm, ctx->args[i].ptr); 994 if (vma) 995 pages[i].addr += (ctx->args[i].ptr & PAGE_MASK) - 996 vma->vm_start; 997 mmap_read_unlock(current->mm); 998 999 pg_start = (ctx->args[i].ptr & PAGE_MASK) >> PAGE_SHIFT; 1000 pg_end = ((ctx->args[i].ptr + len - 1) & PAGE_MASK) >> 1001 PAGE_SHIFT; 1002 pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; 1003 1004 } else { 1005 1006 if (ctx->olaps[oix].offset == 0) { 1007 rlen -= ALIGN(args, FASTRPC_ALIGN) - args; 1008 args = ALIGN(args, FASTRPC_ALIGN); 1009 } 1010 1011 mlen = ctx->olaps[oix].mend - ctx->olaps[oix].mstart; 1012 1013 if (rlen < mlen) 1014 goto bail; 1015 1016 rpra[i].buf.pv = args - ctx->olaps[oix].offset; 1017 pages[i].addr = ctx->buf->phys - 1018 ctx->olaps[oix].offset + 1019 (pkt_size - rlen); 1020 pages[i].addr = pages[i].addr & PAGE_MASK; 1021 1022 pg_start = (rpra[i].buf.pv & PAGE_MASK) >> PAGE_SHIFT; 1023 pg_end = ((rpra[i].buf.pv + len - 1) & PAGE_MASK) >> PAGE_SHIFT; 1024 pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; 1025 args = args + mlen; 1026 rlen -= mlen; 1027 } 1028 1029 if (i < inbufs && !ctx->maps[i]) { 1030 void *dst = (void *)(uintptr_t)rpra[i].buf.pv; 1031 void *src = (void *)(uintptr_t)ctx->args[i].ptr; 1032 1033 if (!kernel) { 1034 if (copy_from_user(dst, (void __user *)src, 1035 len)) { 1036 err = -EFAULT; 1037 goto bail; 1038 } 1039 } else { 1040 memcpy(dst, src, len); 1041 } 1042 } 1043 } 1044 1045 for (i = ctx->nbufs; i < ctx->nscalars; ++i) { 1046 list[i].num = ctx->args[i].length ? 1 : 0; 1047 list[i].pgidx = i; 1048 if (ctx->maps[i]) { 1049 pages[i].addr = ctx->maps[i]->phys; 1050 pages[i].size = ctx->maps[i]->size; 1051 } 1052 rpra[i].dma.fd = ctx->args[i].fd; 1053 rpra[i].dma.len = ctx->args[i].length; 1054 rpra[i].dma.offset = (u64) ctx->args[i].ptr; 1055 } 1056 1057 bail: 1058 if (err) 1059 dev_err(dev, "Error: get invoke args failed:%d\n", err); 1060 1061 return err; 1062 } 1063 1064 static int fastrpc_put_args(struct fastrpc_invoke_ctx *ctx, 1065 u32 kernel) 1066 { 1067 union fastrpc_remote_arg *rpra = ctx->rpra; 1068 struct fastrpc_user *fl = ctx->fl; 1069 struct fastrpc_map *mmap = NULL; 1070 struct fastrpc_invoke_buf *list; 1071 struct fastrpc_phy_page *pages; 1072 u64 *fdlist; 1073 int i, inbufs, outbufs, handles; 1074 1075 inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); 1076 outbufs = REMOTE_SCALARS_OUTBUFS(ctx->sc); 1077 handles = REMOTE_SCALARS_INHANDLES(ctx->sc) + REMOTE_SCALARS_OUTHANDLES(ctx->sc); 1078 list = fastrpc_invoke_buf_start(rpra, ctx->nscalars); 1079 pages = fastrpc_phy_page_start(list, ctx->nscalars); 1080 fdlist = (uint64_t *)(pages + inbufs + outbufs + handles); 1081 1082 for (i = inbufs; i < ctx->nbufs; ++i) { 1083 if (!ctx->maps[i]) { 1084 void *src = (void *)(uintptr_t)rpra[i].buf.pv; 1085 void *dst = (void *)(uintptr_t)ctx->args[i].ptr; 1086 u64 len = rpra[i].buf.len; 1087 1088 if (!kernel) { 1089 if (copy_to_user((void __user *)dst, src, len)) 1090 return -EFAULT; 1091 } else { 1092 memcpy(dst, src, len); 1093 } 1094 } 1095 } 1096 1097 /* Clean up fdlist which is updated by DSP */ 1098 for (i = 0; i < FASTRPC_MAX_FDLIST; i++) { 1099 if (!fdlist[i]) 1100 break; 1101 if (!fastrpc_map_lookup(fl, (int)fdlist[i], &mmap, false)) 1102 fastrpc_map_put(mmap); 1103 } 1104 1105 return 0; 1106 } 1107 1108 static int fastrpc_invoke_send(struct fastrpc_session_ctx *sctx, 1109 struct fastrpc_invoke_ctx *ctx, 1110 u32 kernel, uint32_t handle) 1111 { 1112 struct fastrpc_channel_ctx *cctx; 1113 struct fastrpc_user *fl = ctx->fl; 1114 struct fastrpc_msg *msg = &ctx->msg; 1115 int ret; 1116 1117 cctx = fl->cctx; 1118 msg->client_id = fl->client_id; 1119 msg->tid = current->pid; 1120 1121 if (kernel) 1122 msg->client_id = 0; 1123 1124 msg->ctx = ctx->ctxid | fl->pd; 1125 msg->handle = handle; 1126 msg->sc = ctx->sc; 1127 msg->addr = ctx->buf ? ctx->buf->phys : 0; 1128 msg->size = roundup(ctx->msg_sz, PAGE_SIZE); 1129 fastrpc_context_get(ctx); 1130 1131 ret = rpmsg_send(cctx->rpdev->ept, (void *)msg, sizeof(*msg)); 1132 1133 if (ret) 1134 fastrpc_context_put(ctx); 1135 1136 return ret; 1137 1138 } 1139 1140 static int fastrpc_internal_invoke(struct fastrpc_user *fl, u32 kernel, 1141 u32 handle, u32 sc, 1142 struct fastrpc_invoke_args *args) 1143 { 1144 struct fastrpc_invoke_ctx *ctx = NULL; 1145 struct fastrpc_buf *buf, *b; 1146 1147 int err = 0; 1148 1149 if (!fl->sctx) 1150 return -EINVAL; 1151 1152 if (!fl->cctx->rpdev) 1153 return -EPIPE; 1154 1155 if (handle == FASTRPC_INIT_HANDLE && !kernel) { 1156 dev_warn_ratelimited(fl->sctx->dev, "user app trying to send a kernel RPC message (%d)\n", handle); 1157 return -EPERM; 1158 } 1159 1160 ctx = fastrpc_context_alloc(fl, kernel, sc, args); 1161 if (IS_ERR(ctx)) 1162 return PTR_ERR(ctx); 1163 1164 err = fastrpc_get_args(kernel, ctx); 1165 if (err) 1166 goto bail; 1167 1168 /* make sure that all CPU memory writes are seen by DSP */ 1169 dma_wmb(); 1170 /* Send invoke buffer to remote dsp */ 1171 err = fastrpc_invoke_send(fl->sctx, ctx, kernel, handle); 1172 if (err) 1173 goto bail; 1174 1175 if (kernel) { 1176 if (!wait_for_completion_timeout(&ctx->work, 10 * HZ)) 1177 err = -ETIMEDOUT; 1178 } else { 1179 err = wait_for_completion_interruptible(&ctx->work); 1180 } 1181 1182 if (err) 1183 goto bail; 1184 1185 /* make sure that all memory writes by DSP are seen by CPU */ 1186 dma_rmb(); 1187 /* populate all the output buffers with results */ 1188 err = fastrpc_put_args(ctx, kernel); 1189 if (err) 1190 goto bail; 1191 1192 /* Check the response from remote dsp */ 1193 err = ctx->retval; 1194 if (err) 1195 goto bail; 1196 1197 bail: 1198 if (err != -ERESTARTSYS && err != -ETIMEDOUT) { 1199 /* We are done with this compute context */ 1200 spin_lock(&fl->lock); 1201 list_del(&ctx->node); 1202 spin_unlock(&fl->lock); 1203 fastrpc_context_put(ctx); 1204 } 1205 1206 if (err == -ERESTARTSYS) { 1207 list_for_each_entry_safe(buf, b, &fl->mmaps, node) { 1208 list_del(&buf->node); 1209 list_add_tail(&buf->node, &fl->cctx->invoke_interrupted_mmaps); 1210 } 1211 } 1212 1213 if (err) 1214 dev_dbg(fl->sctx->dev, "Error: Invoke Failed %d\n", err); 1215 1216 return err; 1217 } 1218 1219 static bool is_session_rejected(struct fastrpc_user *fl, bool unsigned_pd_request) 1220 { 1221 /* Check if the device node is non-secure and channel is secure*/ 1222 if (!fl->is_secure_dev && fl->cctx->secure) { 1223 /* 1224 * Allow untrusted applications to offload only to Unsigned PD when 1225 * channel is configured as secure and block untrusted apps on channel 1226 * that does not support unsigned PD offload 1227 */ 1228 if (!fl->cctx->unsigned_support || !unsigned_pd_request) { 1229 dev_err(&fl->cctx->rpdev->dev, "Error: Untrusted application trying to offload to signed PD\n"); 1230 return true; 1231 } 1232 } 1233 1234 return false; 1235 } 1236 1237 static int fastrpc_init_create_static_process(struct fastrpc_user *fl, 1238 char __user *argp) 1239 { 1240 struct fastrpc_init_create_static init; 1241 struct fastrpc_invoke_args *args; 1242 struct fastrpc_phy_page pages[1]; 1243 char *name; 1244 int err; 1245 bool scm_done = false; 1246 struct { 1247 int client_id; 1248 u32 namelen; 1249 u32 pageslen; 1250 } inbuf; 1251 u32 sc; 1252 1253 args = kcalloc(FASTRPC_CREATE_STATIC_PROCESS_NARGS, sizeof(*args), GFP_KERNEL); 1254 if (!args) 1255 return -ENOMEM; 1256 1257 if (copy_from_user(&init, argp, sizeof(init))) { 1258 err = -EFAULT; 1259 goto err; 1260 } 1261 1262 if (init.namelen > INIT_FILE_NAMELEN_MAX) { 1263 err = -EINVAL; 1264 goto err; 1265 } 1266 1267 name = memdup_user(u64_to_user_ptr(init.name), init.namelen); 1268 if (IS_ERR(name)) { 1269 err = PTR_ERR(name); 1270 goto err; 1271 } 1272 1273 if (!fl->cctx->remote_heap) { 1274 err = fastrpc_remote_heap_alloc(fl, fl->sctx->dev, init.memlen, 1275 &fl->cctx->remote_heap); 1276 if (err) 1277 goto err_name; 1278 1279 /* Map if we have any heap VMIDs associated with this ADSP Static Process. */ 1280 if (fl->cctx->vmcount) { 1281 u64 src_perms = BIT(QCOM_SCM_VMID_HLOS); 1282 1283 err = qcom_scm_assign_mem(fl->cctx->remote_heap->phys, 1284 (u64)fl->cctx->remote_heap->size, 1285 &src_perms, 1286 fl->cctx->vmperms, fl->cctx->vmcount); 1287 if (err) { 1288 dev_err(fl->sctx->dev, "Failed to assign memory with phys 0x%llx size 0x%llx err %d\n", 1289 fl->cctx->remote_heap->phys, fl->cctx->remote_heap->size, err); 1290 goto err_map; 1291 } 1292 scm_done = true; 1293 } 1294 } 1295 1296 inbuf.client_id = fl->client_id; 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 kfree(name); 1325 1326 return 0; 1327 err_invoke: 1328 if (fl->cctx->vmcount && scm_done) { 1329 u64 src_perms = 0; 1330 struct qcom_scm_vmperm dst_perms; 1331 u32 i; 1332 1333 for (i = 0; i < fl->cctx->vmcount; i++) 1334 src_perms |= BIT(fl->cctx->vmperms[i].vmid); 1335 1336 dst_perms.vmid = QCOM_SCM_VMID_HLOS; 1337 dst_perms.perm = QCOM_SCM_PERM_RWX; 1338 err = qcom_scm_assign_mem(fl->cctx->remote_heap->phys, 1339 (u64)fl->cctx->remote_heap->size, 1340 &src_perms, &dst_perms, 1); 1341 if (err) 1342 dev_err(fl->sctx->dev, "Failed to assign memory phys 0x%llx size 0x%llx err %d\n", 1343 fl->cctx->remote_heap->phys, fl->cctx->remote_heap->size, err); 1344 } 1345 err_map: 1346 fastrpc_buf_free(fl->cctx->remote_heap); 1347 err_name: 1348 kfree(name); 1349 err: 1350 kfree(args); 1351 1352 return err; 1353 } 1354 1355 static int fastrpc_init_create_process(struct fastrpc_user *fl, 1356 char __user *argp) 1357 { 1358 struct fastrpc_init_create init; 1359 struct fastrpc_invoke_args *args; 1360 struct fastrpc_phy_page pages[1]; 1361 struct fastrpc_map *map = NULL; 1362 struct fastrpc_buf *imem = NULL; 1363 int memlen; 1364 int err; 1365 struct { 1366 int client_id; 1367 u32 namelen; 1368 u32 filelen; 1369 u32 pageslen; 1370 u32 attrs; 1371 u32 siglen; 1372 } inbuf; 1373 u32 sc; 1374 bool unsigned_module = false; 1375 1376 args = kcalloc(FASTRPC_CREATE_PROCESS_NARGS, sizeof(*args), GFP_KERNEL); 1377 if (!args) 1378 return -ENOMEM; 1379 1380 if (copy_from_user(&init, argp, sizeof(init))) { 1381 err = -EFAULT; 1382 goto err; 1383 } 1384 1385 if (init.attrs & FASTRPC_MODE_UNSIGNED_MODULE) 1386 unsigned_module = true; 1387 1388 if (is_session_rejected(fl, unsigned_module)) { 1389 err = -ECONNREFUSED; 1390 goto err; 1391 } 1392 1393 if (init.filelen > INIT_FILELEN_MAX) { 1394 err = -EINVAL; 1395 goto err; 1396 } 1397 1398 inbuf.client_id = fl->client_id; 1399 inbuf.namelen = strlen(current->comm) + 1; 1400 inbuf.filelen = init.filelen; 1401 inbuf.pageslen = 1; 1402 inbuf.attrs = init.attrs; 1403 inbuf.siglen = init.siglen; 1404 fl->pd = USER_PD; 1405 1406 if (init.filelen && init.filefd) { 1407 err = fastrpc_map_create(fl, init.filefd, init.filelen, 0, &map); 1408 if (err) 1409 goto err; 1410 } 1411 1412 memlen = ALIGN(max(INIT_FILELEN_MAX, (int)init.filelen * 4), 1413 1024 * 1024); 1414 err = fastrpc_buf_alloc(fl, fl->sctx->dev, memlen, 1415 &imem); 1416 if (err) 1417 goto err_alloc; 1418 1419 fl->init_mem = imem; 1420 args[0].ptr = (u64)(uintptr_t)&inbuf; 1421 args[0].length = sizeof(inbuf); 1422 args[0].fd = -1; 1423 1424 args[1].ptr = (u64)(uintptr_t)current->comm; 1425 args[1].length = inbuf.namelen; 1426 args[1].fd = -1; 1427 1428 args[2].ptr = (u64) init.file; 1429 args[2].length = inbuf.filelen; 1430 args[2].fd = init.filefd; 1431 1432 pages[0].addr = imem->phys; 1433 pages[0].size = imem->size; 1434 1435 args[3].ptr = (u64)(uintptr_t) pages; 1436 args[3].length = 1 * sizeof(*pages); 1437 args[3].fd = -1; 1438 1439 args[4].ptr = (u64)(uintptr_t)&inbuf.attrs; 1440 args[4].length = sizeof(inbuf.attrs); 1441 args[4].fd = -1; 1442 1443 args[5].ptr = (u64)(uintptr_t) &inbuf.siglen; 1444 args[5].length = sizeof(inbuf.siglen); 1445 args[5].fd = -1; 1446 1447 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE, 4, 0); 1448 if (init.attrs) 1449 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE_ATTR, 4, 0); 1450 1451 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1452 sc, args); 1453 if (err) 1454 goto err_invoke; 1455 1456 kfree(args); 1457 1458 return 0; 1459 1460 err_invoke: 1461 fl->init_mem = NULL; 1462 fastrpc_buf_free(imem); 1463 err_alloc: 1464 fastrpc_map_put(map); 1465 err: 1466 kfree(args); 1467 1468 return err; 1469 } 1470 1471 static struct fastrpc_session_ctx *fastrpc_session_alloc( 1472 struct fastrpc_user *fl) 1473 { 1474 struct fastrpc_channel_ctx *cctx = fl->cctx; 1475 struct fastrpc_session_ctx *session = NULL; 1476 unsigned long flags; 1477 int i; 1478 1479 spin_lock_irqsave(&cctx->lock, flags); 1480 for (i = 0; i < cctx->sesscount; i++) { 1481 if (!cctx->session[i].used && cctx->session[i].valid) { 1482 cctx->session[i].used = true; 1483 session = &cctx->session[i]; 1484 /* any non-zero ID will work, session_idx + 1 is the simplest one */ 1485 fl->client_id = i + 1; 1486 break; 1487 } 1488 } 1489 spin_unlock_irqrestore(&cctx->lock, flags); 1490 1491 return session; 1492 } 1493 1494 static void fastrpc_session_free(struct fastrpc_channel_ctx *cctx, 1495 struct fastrpc_session_ctx *session) 1496 { 1497 unsigned long flags; 1498 1499 spin_lock_irqsave(&cctx->lock, flags); 1500 session->used = false; 1501 spin_unlock_irqrestore(&cctx->lock, flags); 1502 } 1503 1504 static int fastrpc_release_current_dsp_process(struct fastrpc_user *fl) 1505 { 1506 struct fastrpc_invoke_args args[1]; 1507 int client_id = 0; 1508 u32 sc; 1509 1510 client_id = fl->client_id; 1511 args[0].ptr = (u64)(uintptr_t) &client_id; 1512 args[0].length = sizeof(client_id); 1513 args[0].fd = -1; 1514 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_RELEASE, 1, 0); 1515 1516 return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1517 sc, &args[0]); 1518 } 1519 1520 static int fastrpc_device_release(struct inode *inode, struct file *file) 1521 { 1522 struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; 1523 struct fastrpc_channel_ctx *cctx = fl->cctx; 1524 struct fastrpc_invoke_ctx *ctx, *n; 1525 struct fastrpc_map *map, *m; 1526 struct fastrpc_buf *buf, *b; 1527 unsigned long flags; 1528 1529 fastrpc_release_current_dsp_process(fl); 1530 1531 spin_lock_irqsave(&cctx->lock, flags); 1532 list_del(&fl->user); 1533 spin_unlock_irqrestore(&cctx->lock, flags); 1534 1535 if (fl->init_mem) 1536 fastrpc_buf_free(fl->init_mem); 1537 1538 list_for_each_entry_safe(ctx, n, &fl->pending, node) { 1539 list_del(&ctx->node); 1540 fastrpc_context_put(ctx); 1541 } 1542 1543 list_for_each_entry_safe(map, m, &fl->maps, node) 1544 fastrpc_map_put(map); 1545 1546 list_for_each_entry_safe(buf, b, &fl->mmaps, node) { 1547 list_del(&buf->node); 1548 fastrpc_buf_free(buf); 1549 } 1550 1551 fastrpc_session_free(cctx, fl->sctx); 1552 fastrpc_channel_ctx_put(cctx); 1553 1554 mutex_destroy(&fl->mutex); 1555 kfree(fl); 1556 file->private_data = NULL; 1557 1558 return 0; 1559 } 1560 1561 static int fastrpc_device_open(struct inode *inode, struct file *filp) 1562 { 1563 struct fastrpc_channel_ctx *cctx; 1564 struct fastrpc_device *fdevice; 1565 struct fastrpc_user *fl = NULL; 1566 unsigned long flags; 1567 1568 fdevice = miscdev_to_fdevice(filp->private_data); 1569 cctx = fdevice->cctx; 1570 1571 fl = kzalloc(sizeof(*fl), GFP_KERNEL); 1572 if (!fl) 1573 return -ENOMEM; 1574 1575 /* Released in fastrpc_device_release() */ 1576 fastrpc_channel_ctx_get(cctx); 1577 1578 filp->private_data = fl; 1579 spin_lock_init(&fl->lock); 1580 mutex_init(&fl->mutex); 1581 INIT_LIST_HEAD(&fl->pending); 1582 INIT_LIST_HEAD(&fl->maps); 1583 INIT_LIST_HEAD(&fl->mmaps); 1584 INIT_LIST_HEAD(&fl->user); 1585 fl->cctx = cctx; 1586 fl->is_secure_dev = fdevice->secure; 1587 1588 fl->sctx = fastrpc_session_alloc(fl); 1589 if (!fl->sctx) { 1590 dev_err(&cctx->rpdev->dev, "No session available\n"); 1591 mutex_destroy(&fl->mutex); 1592 kfree(fl); 1593 1594 return -EBUSY; 1595 } 1596 1597 spin_lock_irqsave(&cctx->lock, flags); 1598 list_add_tail(&fl->user, &cctx->users); 1599 spin_unlock_irqrestore(&cctx->lock, flags); 1600 1601 return 0; 1602 } 1603 1604 static int fastrpc_dmabuf_alloc(struct fastrpc_user *fl, char __user *argp) 1605 { 1606 struct fastrpc_alloc_dma_buf bp; 1607 DEFINE_DMA_BUF_EXPORT_INFO(exp_info); 1608 struct fastrpc_buf *buf = NULL; 1609 int err; 1610 1611 if (copy_from_user(&bp, argp, sizeof(bp))) 1612 return -EFAULT; 1613 1614 err = fastrpc_buf_alloc(fl, fl->sctx->dev, bp.size, &buf); 1615 if (err) 1616 return err; 1617 exp_info.ops = &fastrpc_dma_buf_ops; 1618 exp_info.size = bp.size; 1619 exp_info.flags = O_RDWR; 1620 exp_info.priv = buf; 1621 buf->dmabuf = dma_buf_export(&exp_info); 1622 if (IS_ERR(buf->dmabuf)) { 1623 err = PTR_ERR(buf->dmabuf); 1624 fastrpc_buf_free(buf); 1625 return err; 1626 } 1627 1628 bp.fd = dma_buf_fd(buf->dmabuf, O_ACCMODE); 1629 if (bp.fd < 0) { 1630 dma_buf_put(buf->dmabuf); 1631 return -EINVAL; 1632 } 1633 1634 if (copy_to_user(argp, &bp, sizeof(bp))) { 1635 /* 1636 * The usercopy failed, but we can't do much about it, as 1637 * dma_buf_fd() already called fd_install() and made the 1638 * file descriptor accessible for the current process. It 1639 * might already be closed and dmabuf no longer valid when 1640 * we reach this point. Therefore "leak" the fd and rely on 1641 * the process exit path to do any required cleanup. 1642 */ 1643 return -EFAULT; 1644 } 1645 1646 return 0; 1647 } 1648 1649 static int fastrpc_init_attach(struct fastrpc_user *fl, int pd) 1650 { 1651 struct fastrpc_invoke_args args[1]; 1652 int client_id = fl->client_id; 1653 u32 sc; 1654 1655 args[0].ptr = (u64)(uintptr_t) &client_id; 1656 args[0].length = sizeof(client_id); 1657 args[0].fd = -1; 1658 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_ATTACH, 1, 0); 1659 fl->pd = pd; 1660 1661 return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, 1662 sc, &args[0]); 1663 } 1664 1665 static int fastrpc_invoke(struct fastrpc_user *fl, char __user *argp) 1666 { 1667 struct fastrpc_invoke_args *args = NULL; 1668 struct fastrpc_invoke inv; 1669 u32 nscalars; 1670 int err; 1671 1672 if (copy_from_user(&inv, argp, sizeof(inv))) 1673 return -EFAULT; 1674 1675 /* nscalars is truncated here to max supported value */ 1676 nscalars = REMOTE_SCALARS_LENGTH(inv.sc); 1677 if (nscalars) { 1678 args = kcalloc(nscalars, sizeof(*args), GFP_KERNEL); 1679 if (!args) 1680 return -ENOMEM; 1681 1682 if (copy_from_user(args, (void __user *)(uintptr_t)inv.args, 1683 nscalars * sizeof(*args))) { 1684 kfree(args); 1685 return -EFAULT; 1686 } 1687 } 1688 1689 err = fastrpc_internal_invoke(fl, false, inv.handle, inv.sc, args); 1690 kfree(args); 1691 1692 return err; 1693 } 1694 1695 static int fastrpc_get_info_from_dsp(struct fastrpc_user *fl, uint32_t *dsp_attr_buf, 1696 uint32_t dsp_attr_buf_len) 1697 { 1698 struct fastrpc_invoke_args args[2] = { 0 }; 1699 1700 /* 1701 * Capability filled in userspace. This carries the information 1702 * about the remoteproc support which is fetched from the remoteproc 1703 * sysfs node by userspace. 1704 */ 1705 dsp_attr_buf[0] = 0; 1706 dsp_attr_buf_len -= 1; 1707 1708 args[0].ptr = (u64)(uintptr_t)&dsp_attr_buf_len; 1709 args[0].length = sizeof(dsp_attr_buf_len); 1710 args[0].fd = -1; 1711 args[1].ptr = (u64)(uintptr_t)&dsp_attr_buf[1]; 1712 args[1].length = dsp_attr_buf_len * sizeof(u32); 1713 args[1].fd = -1; 1714 1715 return fastrpc_internal_invoke(fl, true, FASTRPC_DSP_UTILITIES_HANDLE, 1716 FASTRPC_SCALARS(0, 1, 1), args); 1717 } 1718 1719 static int fastrpc_get_info_from_kernel(struct fastrpc_ioctl_capability *cap, 1720 struct fastrpc_user *fl) 1721 { 1722 struct fastrpc_channel_ctx *cctx = fl->cctx; 1723 uint32_t attribute_id = cap->attribute_id; 1724 uint32_t *dsp_attributes; 1725 unsigned long flags; 1726 uint32_t domain = cap->domain; 1727 int err; 1728 1729 spin_lock_irqsave(&cctx->lock, flags); 1730 /* check if we already have queried dsp for attributes */ 1731 if (cctx->valid_attributes) { 1732 spin_unlock_irqrestore(&cctx->lock, flags); 1733 goto done; 1734 } 1735 spin_unlock_irqrestore(&cctx->lock, flags); 1736 1737 dsp_attributes = kzalloc(FASTRPC_MAX_DSP_ATTRIBUTES_LEN, GFP_KERNEL); 1738 if (!dsp_attributes) 1739 return -ENOMEM; 1740 1741 err = fastrpc_get_info_from_dsp(fl, dsp_attributes, FASTRPC_MAX_DSP_ATTRIBUTES); 1742 if (err == DSP_UNSUPPORTED_API) { 1743 dev_info(&cctx->rpdev->dev, 1744 "Warning: DSP capabilities not supported on domain: %d\n", domain); 1745 kfree(dsp_attributes); 1746 return -EOPNOTSUPP; 1747 } else if (err) { 1748 dev_err(&cctx->rpdev->dev, "Error: dsp information is incorrect err: %d\n", err); 1749 kfree(dsp_attributes); 1750 return err; 1751 } 1752 1753 spin_lock_irqsave(&cctx->lock, flags); 1754 memcpy(cctx->dsp_attributes, dsp_attributes, FASTRPC_MAX_DSP_ATTRIBUTES_LEN); 1755 cctx->valid_attributes = true; 1756 spin_unlock_irqrestore(&cctx->lock, flags); 1757 kfree(dsp_attributes); 1758 done: 1759 cap->capability = cctx->dsp_attributes[attribute_id]; 1760 return 0; 1761 } 1762 1763 static int fastrpc_get_dsp_info(struct fastrpc_user *fl, char __user *argp) 1764 { 1765 struct fastrpc_ioctl_capability cap = {0}; 1766 int err = 0; 1767 1768 if (copy_from_user(&cap, argp, sizeof(cap))) 1769 return -EFAULT; 1770 1771 cap.capability = 0; 1772 if (cap.domain >= FASTRPC_DEV_MAX) { 1773 dev_err(&fl->cctx->rpdev->dev, "Error: Invalid domain id:%d, err:%d\n", 1774 cap.domain, err); 1775 return -ECHRNG; 1776 } 1777 1778 /* Fastrpc Capablities does not support modem domain */ 1779 if (cap.domain == MDSP_DOMAIN_ID) { 1780 dev_err(&fl->cctx->rpdev->dev, "Error: modem not supported %d\n", err); 1781 return -ECHRNG; 1782 } 1783 1784 if (cap.attribute_id >= FASTRPC_MAX_DSP_ATTRIBUTES) { 1785 dev_err(&fl->cctx->rpdev->dev, "Error: invalid attribute: %d, err: %d\n", 1786 cap.attribute_id, err); 1787 return -EOVERFLOW; 1788 } 1789 1790 err = fastrpc_get_info_from_kernel(&cap, fl); 1791 if (err) 1792 return err; 1793 1794 if (copy_to_user(argp, &cap, sizeof(cap))) 1795 return -EFAULT; 1796 1797 return 0; 1798 } 1799 1800 static int fastrpc_req_munmap_impl(struct fastrpc_user *fl, struct fastrpc_buf *buf) 1801 { 1802 struct fastrpc_invoke_args args[1] = { [0] = { 0 } }; 1803 struct fastrpc_munmap_req_msg req_msg; 1804 struct device *dev = fl->sctx->dev; 1805 int err; 1806 u32 sc; 1807 1808 req_msg.client_id = fl->client_id; 1809 req_msg.size = buf->size; 1810 req_msg.vaddr = buf->raddr; 1811 1812 args[0].ptr = (u64) (uintptr_t) &req_msg; 1813 args[0].length = sizeof(req_msg); 1814 1815 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MUNMAP, 1, 0); 1816 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, 1817 &args[0]); 1818 if (!err) { 1819 dev_dbg(dev, "unmmap\tpt 0x%09lx OK\n", buf->raddr); 1820 spin_lock(&fl->lock); 1821 list_del(&buf->node); 1822 spin_unlock(&fl->lock); 1823 fastrpc_buf_free(buf); 1824 } else { 1825 dev_err(dev, "unmmap\tpt 0x%09lx ERROR\n", buf->raddr); 1826 } 1827 1828 return err; 1829 } 1830 1831 static int fastrpc_req_munmap(struct fastrpc_user *fl, char __user *argp) 1832 { 1833 struct fastrpc_buf *buf = NULL, *iter, *b; 1834 struct fastrpc_req_munmap req; 1835 struct device *dev = fl->sctx->dev; 1836 1837 if (copy_from_user(&req, argp, sizeof(req))) 1838 return -EFAULT; 1839 1840 spin_lock(&fl->lock); 1841 list_for_each_entry_safe(iter, b, &fl->mmaps, node) { 1842 if ((iter->raddr == req.vaddrout) && (iter->size == req.size)) { 1843 buf = iter; 1844 break; 1845 } 1846 } 1847 spin_unlock(&fl->lock); 1848 1849 if (!buf) { 1850 dev_err(dev, "mmap\t\tpt 0x%09llx [len 0x%08llx] not in list\n", 1851 req.vaddrout, req.size); 1852 return -EINVAL; 1853 } 1854 1855 return fastrpc_req_munmap_impl(fl, buf); 1856 } 1857 1858 static int fastrpc_req_mmap(struct fastrpc_user *fl, char __user *argp) 1859 { 1860 struct fastrpc_invoke_args args[3] = { [0 ... 2] = { 0 } }; 1861 struct fastrpc_buf *buf = NULL; 1862 struct fastrpc_mmap_req_msg req_msg; 1863 struct fastrpc_mmap_rsp_msg rsp_msg; 1864 struct fastrpc_phy_page pages; 1865 struct fastrpc_req_mmap req; 1866 struct device *dev = fl->sctx->dev; 1867 int err; 1868 u32 sc; 1869 1870 if (copy_from_user(&req, argp, sizeof(req))) 1871 return -EFAULT; 1872 1873 if (req.flags != ADSP_MMAP_ADD_PAGES && req.flags != ADSP_MMAP_REMOTE_HEAP_ADDR) { 1874 dev_err(dev, "flag not supported 0x%x\n", req.flags); 1875 1876 return -EINVAL; 1877 } 1878 1879 if (req.vaddrin) { 1880 dev_err(dev, "adding user allocated pages is not supported\n"); 1881 return -EINVAL; 1882 } 1883 1884 if (req.flags == ADSP_MMAP_REMOTE_HEAP_ADDR) 1885 err = fastrpc_remote_heap_alloc(fl, dev, req.size, &buf); 1886 else 1887 err = fastrpc_buf_alloc(fl, dev, req.size, &buf); 1888 1889 if (err) { 1890 dev_err(dev, "failed to allocate buffer\n"); 1891 return err; 1892 } 1893 1894 req_msg.client_id = fl->client_id; 1895 req_msg.flags = req.flags; 1896 req_msg.vaddr = req.vaddrin; 1897 req_msg.num = sizeof(pages); 1898 1899 args[0].ptr = (u64) (uintptr_t) &req_msg; 1900 args[0].length = sizeof(req_msg); 1901 1902 pages.addr = buf->phys; 1903 pages.size = buf->size; 1904 1905 args[1].ptr = (u64) (uintptr_t) &pages; 1906 args[1].length = sizeof(pages); 1907 1908 args[2].ptr = (u64) (uintptr_t) &rsp_msg; 1909 args[2].length = sizeof(rsp_msg); 1910 1911 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MMAP, 2, 1); 1912 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, 1913 &args[0]); 1914 if (err) { 1915 dev_err(dev, "mmap error (len 0x%08llx)\n", buf->size); 1916 fastrpc_buf_free(buf); 1917 return err; 1918 } 1919 1920 /* update the buffer to be able to deallocate the memory on the DSP */ 1921 buf->raddr = (uintptr_t) rsp_msg.vaddr; 1922 1923 /* let the client know the address to use */ 1924 req.vaddrout = rsp_msg.vaddr; 1925 1926 /* Add memory to static PD pool, protection thru hypervisor */ 1927 if (req.flags == ADSP_MMAP_REMOTE_HEAP_ADDR && fl->cctx->vmcount) { 1928 u64 src_perms = BIT(QCOM_SCM_VMID_HLOS); 1929 1930 err = qcom_scm_assign_mem(buf->phys, (u64)buf->size, 1931 &src_perms, fl->cctx->vmperms, fl->cctx->vmcount); 1932 if (err) { 1933 dev_err(fl->sctx->dev, "Failed to assign memory phys 0x%llx size 0x%llx err %d", 1934 buf->phys, buf->size, err); 1935 goto err_assign; 1936 } 1937 } 1938 1939 spin_lock(&fl->lock); 1940 list_add_tail(&buf->node, &fl->mmaps); 1941 spin_unlock(&fl->lock); 1942 1943 if (copy_to_user((void __user *)argp, &req, sizeof(req))) { 1944 err = -EFAULT; 1945 goto err_assign; 1946 } 1947 1948 dev_dbg(dev, "mmap\t\tpt 0x%09lx OK [len 0x%08llx]\n", 1949 buf->raddr, buf->size); 1950 1951 return 0; 1952 1953 err_assign: 1954 fastrpc_req_munmap_impl(fl, buf); 1955 1956 return err; 1957 } 1958 1959 static int fastrpc_req_mem_unmap_impl(struct fastrpc_user *fl, struct fastrpc_mem_unmap *req) 1960 { 1961 struct fastrpc_invoke_args args[1] = { [0] = { 0 } }; 1962 struct fastrpc_map *map = NULL, *iter, *m; 1963 struct fastrpc_mem_unmap_req_msg req_msg = { 0 }; 1964 int err = 0; 1965 u32 sc; 1966 struct device *dev = fl->sctx->dev; 1967 1968 spin_lock(&fl->lock); 1969 list_for_each_entry_safe(iter, m, &fl->maps, node) { 1970 if ((req->fd < 0 || iter->fd == req->fd) && (iter->raddr == req->vaddr)) { 1971 map = iter; 1972 break; 1973 } 1974 } 1975 1976 spin_unlock(&fl->lock); 1977 1978 if (!map) { 1979 dev_err(dev, "map not in list\n"); 1980 return -EINVAL; 1981 } 1982 1983 req_msg.client_id = fl->client_id; 1984 req_msg.len = map->len; 1985 req_msg.vaddrin = map->raddr; 1986 req_msg.fd = map->fd; 1987 1988 args[0].ptr = (u64) (uintptr_t) &req_msg; 1989 args[0].length = sizeof(req_msg); 1990 1991 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MEM_UNMAP, 1, 0); 1992 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, 1993 &args[0]); 1994 if (err) { 1995 dev_err(dev, "unmmap\tpt fd = %d, 0x%09llx error\n", map->fd, map->raddr); 1996 return err; 1997 } 1998 fastrpc_map_put(map); 1999 2000 return 0; 2001 } 2002 2003 static int fastrpc_req_mem_unmap(struct fastrpc_user *fl, char __user *argp) 2004 { 2005 struct fastrpc_mem_unmap req; 2006 2007 if (copy_from_user(&req, argp, sizeof(req))) 2008 return -EFAULT; 2009 2010 return fastrpc_req_mem_unmap_impl(fl, &req); 2011 } 2012 2013 static int fastrpc_req_mem_map(struct fastrpc_user *fl, char __user *argp) 2014 { 2015 struct fastrpc_invoke_args args[4] = { [0 ... 3] = { 0 } }; 2016 struct fastrpc_mem_map_req_msg req_msg = { 0 }; 2017 struct fastrpc_mmap_rsp_msg rsp_msg = { 0 }; 2018 struct fastrpc_mem_unmap req_unmap = { 0 }; 2019 struct fastrpc_phy_page pages = { 0 }; 2020 struct fastrpc_mem_map req; 2021 struct device *dev = fl->sctx->dev; 2022 struct fastrpc_map *map = NULL; 2023 int err; 2024 u32 sc; 2025 2026 if (copy_from_user(&req, argp, sizeof(req))) 2027 return -EFAULT; 2028 2029 /* create SMMU mapping */ 2030 err = fastrpc_map_create(fl, req.fd, req.length, 0, &map); 2031 if (err) { 2032 dev_err(dev, "failed to map buffer, fd = %d\n", req.fd); 2033 return err; 2034 } 2035 2036 req_msg.client_id = fl->client_id; 2037 req_msg.fd = req.fd; 2038 req_msg.offset = req.offset; 2039 req_msg.vaddrin = req.vaddrin; 2040 map->va = (void *) (uintptr_t) req.vaddrin; 2041 req_msg.flags = req.flags; 2042 req_msg.num = sizeof(pages); 2043 req_msg.data_len = 0; 2044 2045 args[0].ptr = (u64) (uintptr_t) &req_msg; 2046 args[0].length = sizeof(req_msg); 2047 2048 pages.addr = map->phys; 2049 pages.size = map->size; 2050 2051 args[1].ptr = (u64) (uintptr_t) &pages; 2052 args[1].length = sizeof(pages); 2053 2054 args[2].ptr = (u64) (uintptr_t) &pages; 2055 args[2].length = 0; 2056 2057 args[3].ptr = (u64) (uintptr_t) &rsp_msg; 2058 args[3].length = sizeof(rsp_msg); 2059 2060 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MEM_MAP, 3, 1); 2061 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, &args[0]); 2062 if (err) { 2063 dev_err(dev, "mem mmap error, fd %d, vaddr %llx, size %lld\n", 2064 req.fd, req.vaddrin, map->size); 2065 goto err_invoke; 2066 } 2067 2068 /* update the buffer to be able to deallocate the memory on the DSP */ 2069 map->raddr = rsp_msg.vaddr; 2070 2071 /* let the client know the address to use */ 2072 req.vaddrout = rsp_msg.vaddr; 2073 2074 if (copy_to_user((void __user *)argp, &req, sizeof(req))) { 2075 /* unmap the memory and release the buffer */ 2076 req_unmap.vaddr = (uintptr_t) rsp_msg.vaddr; 2077 req_unmap.length = map->size; 2078 fastrpc_req_mem_unmap_impl(fl, &req_unmap); 2079 return -EFAULT; 2080 } 2081 2082 return 0; 2083 2084 err_invoke: 2085 fastrpc_map_put(map); 2086 2087 return err; 2088 } 2089 2090 static long fastrpc_device_ioctl(struct file *file, unsigned int cmd, 2091 unsigned long arg) 2092 { 2093 struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; 2094 char __user *argp = (char __user *)arg; 2095 int err; 2096 2097 switch (cmd) { 2098 case FASTRPC_IOCTL_INVOKE: 2099 err = fastrpc_invoke(fl, argp); 2100 break; 2101 case FASTRPC_IOCTL_INIT_ATTACH: 2102 err = fastrpc_init_attach(fl, ROOT_PD); 2103 break; 2104 case FASTRPC_IOCTL_INIT_ATTACH_SNS: 2105 err = fastrpc_init_attach(fl, SENSORS_PD); 2106 break; 2107 case FASTRPC_IOCTL_INIT_CREATE_STATIC: 2108 err = fastrpc_init_create_static_process(fl, argp); 2109 break; 2110 case FASTRPC_IOCTL_INIT_CREATE: 2111 err = fastrpc_init_create_process(fl, argp); 2112 break; 2113 case FASTRPC_IOCTL_ALLOC_DMA_BUFF: 2114 err = fastrpc_dmabuf_alloc(fl, argp); 2115 break; 2116 case FASTRPC_IOCTL_MMAP: 2117 err = fastrpc_req_mmap(fl, argp); 2118 break; 2119 case FASTRPC_IOCTL_MUNMAP: 2120 err = fastrpc_req_munmap(fl, argp); 2121 break; 2122 case FASTRPC_IOCTL_MEM_MAP: 2123 err = fastrpc_req_mem_map(fl, argp); 2124 break; 2125 case FASTRPC_IOCTL_MEM_UNMAP: 2126 err = fastrpc_req_mem_unmap(fl, argp); 2127 break; 2128 case FASTRPC_IOCTL_GET_DSP_INFO: 2129 err = fastrpc_get_dsp_info(fl, argp); 2130 break; 2131 default: 2132 err = -ENOTTY; 2133 break; 2134 } 2135 2136 return err; 2137 } 2138 2139 static const struct file_operations fastrpc_fops = { 2140 .open = fastrpc_device_open, 2141 .release = fastrpc_device_release, 2142 .unlocked_ioctl = fastrpc_device_ioctl, 2143 .compat_ioctl = fastrpc_device_ioctl, 2144 }; 2145 2146 static int fastrpc_cb_probe(struct platform_device *pdev) 2147 { 2148 struct fastrpc_channel_ctx *cctx; 2149 struct fastrpc_session_ctx *sess; 2150 struct device *dev = &pdev->dev; 2151 int i, sessions = 0; 2152 unsigned long flags; 2153 int rc; 2154 2155 cctx = dev_get_drvdata(dev->parent); 2156 if (!cctx) 2157 return -EINVAL; 2158 2159 of_property_read_u32(dev->of_node, "qcom,nsessions", &sessions); 2160 2161 spin_lock_irqsave(&cctx->lock, flags); 2162 if (cctx->sesscount >= FASTRPC_MAX_SESSIONS) { 2163 dev_err(&pdev->dev, "too many sessions\n"); 2164 spin_unlock_irqrestore(&cctx->lock, flags); 2165 return -ENOSPC; 2166 } 2167 sess = &cctx->session[cctx->sesscount++]; 2168 sess->used = false; 2169 sess->valid = true; 2170 sess->dev = dev; 2171 dev_set_drvdata(dev, sess); 2172 2173 if (of_property_read_u32(dev->of_node, "reg", &sess->sid)) 2174 dev_info(dev, "FastRPC Session ID not specified in DT\n"); 2175 2176 if (sessions > 0) { 2177 struct fastrpc_session_ctx *dup_sess; 2178 2179 for (i = 1; i < sessions; i++) { 2180 if (cctx->sesscount >= FASTRPC_MAX_SESSIONS) 2181 break; 2182 dup_sess = &cctx->session[cctx->sesscount++]; 2183 memcpy(dup_sess, sess, sizeof(*dup_sess)); 2184 } 2185 } 2186 spin_unlock_irqrestore(&cctx->lock, flags); 2187 rc = dma_set_mask(dev, DMA_BIT_MASK(32)); 2188 if (rc) { 2189 dev_err(dev, "32-bit DMA enable failed\n"); 2190 return rc; 2191 } 2192 2193 return 0; 2194 } 2195 2196 static void fastrpc_cb_remove(struct platform_device *pdev) 2197 { 2198 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(pdev->dev.parent); 2199 struct fastrpc_session_ctx *sess = dev_get_drvdata(&pdev->dev); 2200 unsigned long flags; 2201 int i; 2202 2203 spin_lock_irqsave(&cctx->lock, flags); 2204 for (i = 0; i < FASTRPC_MAX_SESSIONS; i++) { 2205 if (cctx->session[i].sid == sess->sid) { 2206 cctx->session[i].valid = false; 2207 cctx->sesscount--; 2208 } 2209 } 2210 spin_unlock_irqrestore(&cctx->lock, flags); 2211 } 2212 2213 static const struct of_device_id fastrpc_match_table[] = { 2214 { .compatible = "qcom,fastrpc-compute-cb", }, 2215 {} 2216 }; 2217 2218 static struct platform_driver fastrpc_cb_driver = { 2219 .probe = fastrpc_cb_probe, 2220 .remove = fastrpc_cb_remove, 2221 .driver = { 2222 .name = "qcom,fastrpc-cb", 2223 .of_match_table = fastrpc_match_table, 2224 .suppress_bind_attrs = true, 2225 }, 2226 }; 2227 2228 static int fastrpc_device_register(struct device *dev, struct fastrpc_channel_ctx *cctx, 2229 bool is_secured, const char *domain) 2230 { 2231 struct fastrpc_device *fdev; 2232 int err; 2233 2234 fdev = devm_kzalloc(dev, sizeof(*fdev), GFP_KERNEL); 2235 if (!fdev) 2236 return -ENOMEM; 2237 2238 fdev->secure = is_secured; 2239 fdev->cctx = cctx; 2240 fdev->miscdev.minor = MISC_DYNAMIC_MINOR; 2241 fdev->miscdev.fops = &fastrpc_fops; 2242 fdev->miscdev.name = devm_kasprintf(dev, GFP_KERNEL, "fastrpc-%s%s", 2243 domain, is_secured ? "-secure" : ""); 2244 if (!fdev->miscdev.name) 2245 return -ENOMEM; 2246 2247 err = misc_register(&fdev->miscdev); 2248 if (!err) { 2249 if (is_secured) 2250 cctx->secure_fdevice = fdev; 2251 else 2252 cctx->fdevice = fdev; 2253 } 2254 2255 return err; 2256 } 2257 2258 static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev) 2259 { 2260 struct device *rdev = &rpdev->dev; 2261 struct fastrpc_channel_ctx *data; 2262 int i, err, domain_id = -1, vmcount; 2263 const char *domain; 2264 bool secure_dsp; 2265 struct device_node *rmem_node; 2266 struct reserved_mem *rmem; 2267 unsigned int vmids[FASTRPC_MAX_VMIDS]; 2268 2269 err = of_property_read_string(rdev->of_node, "label", &domain); 2270 if (err) { 2271 dev_info(rdev, "FastRPC Domain not specified in DT\n"); 2272 return err; 2273 } 2274 2275 for (i = 0; i < FASTRPC_DEV_MAX; i++) { 2276 if (!strcmp(domains[i], domain)) { 2277 domain_id = i; 2278 break; 2279 } 2280 } 2281 2282 if (domain_id < 0) { 2283 dev_info(rdev, "FastRPC Invalid Domain ID %d\n", domain_id); 2284 return -EINVAL; 2285 } 2286 2287 if (of_reserved_mem_device_init_by_idx(rdev, rdev->of_node, 0)) 2288 dev_info(rdev, "no reserved DMA memory for FASTRPC\n"); 2289 2290 vmcount = of_property_read_variable_u32_array(rdev->of_node, 2291 "qcom,vmids", &vmids[0], 0, FASTRPC_MAX_VMIDS); 2292 if (vmcount < 0) 2293 vmcount = 0; 2294 else if (!qcom_scm_is_available()) 2295 return -EPROBE_DEFER; 2296 2297 data = kzalloc(sizeof(*data), GFP_KERNEL); 2298 if (!data) 2299 return -ENOMEM; 2300 2301 if (vmcount) { 2302 data->vmcount = vmcount; 2303 for (i = 0; i < data->vmcount; i++) { 2304 data->vmperms[i].vmid = vmids[i]; 2305 data->vmperms[i].perm = QCOM_SCM_PERM_RWX; 2306 } 2307 } 2308 2309 rmem_node = of_parse_phandle(rdev->of_node, "memory-region", 0); 2310 if (domain_id == SDSP_DOMAIN_ID && rmem_node) { 2311 u64 src_perms; 2312 2313 rmem = of_reserved_mem_lookup(rmem_node); 2314 if (!rmem) { 2315 err = -EINVAL; 2316 goto err_free_data; 2317 } 2318 2319 src_perms = BIT(QCOM_SCM_VMID_HLOS); 2320 2321 qcom_scm_assign_mem(rmem->base, rmem->size, &src_perms, 2322 data->vmperms, data->vmcount); 2323 2324 } 2325 2326 secure_dsp = !(of_property_read_bool(rdev->of_node, "qcom,non-secure-domain")); 2327 data->secure = secure_dsp; 2328 2329 switch (domain_id) { 2330 case ADSP_DOMAIN_ID: 2331 case MDSP_DOMAIN_ID: 2332 case SDSP_DOMAIN_ID: 2333 /* Unsigned PD offloading is only supported on CDSP and CDSP1 */ 2334 data->unsigned_support = false; 2335 err = fastrpc_device_register(rdev, data, secure_dsp, domains[domain_id]); 2336 if (err) 2337 goto err_free_data; 2338 break; 2339 case CDSP_DOMAIN_ID: 2340 case CDSP1_DOMAIN_ID: 2341 data->unsigned_support = true; 2342 /* Create both device nodes so that we can allow both Signed and Unsigned PD */ 2343 err = fastrpc_device_register(rdev, data, true, domains[domain_id]); 2344 if (err) 2345 goto err_free_data; 2346 2347 err = fastrpc_device_register(rdev, data, false, domains[domain_id]); 2348 if (err) 2349 goto err_deregister_fdev; 2350 break; 2351 default: 2352 err = -EINVAL; 2353 goto err_free_data; 2354 } 2355 2356 kref_init(&data->refcount); 2357 2358 dev_set_drvdata(&rpdev->dev, data); 2359 rdev->dma_mask = &data->dma_mask; 2360 dma_set_mask_and_coherent(rdev, DMA_BIT_MASK(32)); 2361 INIT_LIST_HEAD(&data->users); 2362 INIT_LIST_HEAD(&data->invoke_interrupted_mmaps); 2363 spin_lock_init(&data->lock); 2364 idr_init(&data->ctx_idr); 2365 data->domain_id = domain_id; 2366 data->rpdev = rpdev; 2367 2368 err = of_platform_populate(rdev->of_node, NULL, NULL, rdev); 2369 if (err) 2370 goto err_deregister_fdev; 2371 2372 return 0; 2373 2374 err_deregister_fdev: 2375 if (data->fdevice) 2376 misc_deregister(&data->fdevice->miscdev); 2377 if (data->secure_fdevice) 2378 misc_deregister(&data->secure_fdevice->miscdev); 2379 2380 err_free_data: 2381 kfree(data); 2382 return err; 2383 } 2384 2385 static void fastrpc_notify_users(struct fastrpc_user *user) 2386 { 2387 struct fastrpc_invoke_ctx *ctx; 2388 2389 spin_lock(&user->lock); 2390 list_for_each_entry(ctx, &user->pending, node) { 2391 ctx->retval = -EPIPE; 2392 complete(&ctx->work); 2393 } 2394 spin_unlock(&user->lock); 2395 } 2396 2397 static void fastrpc_rpmsg_remove(struct rpmsg_device *rpdev) 2398 { 2399 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); 2400 struct fastrpc_buf *buf, *b; 2401 struct fastrpc_user *user; 2402 unsigned long flags; 2403 2404 /* No invocations past this point */ 2405 spin_lock_irqsave(&cctx->lock, flags); 2406 cctx->rpdev = NULL; 2407 list_for_each_entry(user, &cctx->users, user) 2408 fastrpc_notify_users(user); 2409 spin_unlock_irqrestore(&cctx->lock, flags); 2410 2411 if (cctx->fdevice) 2412 misc_deregister(&cctx->fdevice->miscdev); 2413 2414 if (cctx->secure_fdevice) 2415 misc_deregister(&cctx->secure_fdevice->miscdev); 2416 2417 list_for_each_entry_safe(buf, b, &cctx->invoke_interrupted_mmaps, node) 2418 list_del(&buf->node); 2419 2420 if (cctx->remote_heap) 2421 fastrpc_buf_free(cctx->remote_heap); 2422 2423 of_platform_depopulate(&rpdev->dev); 2424 2425 fastrpc_channel_ctx_put(cctx); 2426 } 2427 2428 static int fastrpc_rpmsg_callback(struct rpmsg_device *rpdev, void *data, 2429 int len, void *priv, u32 addr) 2430 { 2431 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); 2432 struct fastrpc_invoke_rsp *rsp = data; 2433 struct fastrpc_invoke_ctx *ctx; 2434 unsigned long flags; 2435 unsigned long ctxid; 2436 2437 if (len < sizeof(*rsp)) 2438 return -EINVAL; 2439 2440 ctxid = ((rsp->ctx & FASTRPC_CTXID_MASK) >> 4); 2441 2442 spin_lock_irqsave(&cctx->lock, flags); 2443 ctx = idr_find(&cctx->ctx_idr, ctxid); 2444 spin_unlock_irqrestore(&cctx->lock, flags); 2445 2446 if (!ctx) { 2447 dev_err(&rpdev->dev, "No context ID matches response\n"); 2448 return -ENOENT; 2449 } 2450 2451 ctx->retval = rsp->retval; 2452 complete(&ctx->work); 2453 2454 /* 2455 * The DMA buffer associated with the context cannot be freed in 2456 * interrupt context so schedule it through a worker thread to 2457 * avoid a kernel BUG. 2458 */ 2459 schedule_work(&ctx->put_work); 2460 2461 return 0; 2462 } 2463 2464 static const struct of_device_id fastrpc_rpmsg_of_match[] = { 2465 { .compatible = "qcom,fastrpc" }, 2466 { }, 2467 }; 2468 MODULE_DEVICE_TABLE(of, fastrpc_rpmsg_of_match); 2469 2470 static struct rpmsg_driver fastrpc_driver = { 2471 .probe = fastrpc_rpmsg_probe, 2472 .remove = fastrpc_rpmsg_remove, 2473 .callback = fastrpc_rpmsg_callback, 2474 .drv = { 2475 .name = "qcom,fastrpc", 2476 .of_match_table = fastrpc_rpmsg_of_match, 2477 }, 2478 }; 2479 2480 static int fastrpc_init(void) 2481 { 2482 int ret; 2483 2484 ret = platform_driver_register(&fastrpc_cb_driver); 2485 if (ret < 0) { 2486 pr_err("fastrpc: failed to register cb driver\n"); 2487 return ret; 2488 } 2489 2490 ret = register_rpmsg_driver(&fastrpc_driver); 2491 if (ret < 0) { 2492 pr_err("fastrpc: failed to register rpmsg driver\n"); 2493 platform_driver_unregister(&fastrpc_cb_driver); 2494 return ret; 2495 } 2496 2497 return 0; 2498 } 2499 module_init(fastrpc_init); 2500 2501 static void fastrpc_exit(void) 2502 { 2503 platform_driver_unregister(&fastrpc_cb_driver); 2504 unregister_rpmsg_driver(&fastrpc_driver); 2505 } 2506 module_exit(fastrpc_exit); 2507 2508 MODULE_DESCRIPTION("Qualcomm FastRPC"); 2509 MODULE_LICENSE("GPL v2"); 2510 MODULE_IMPORT_NS("DMA_BUF"); 2511