fastrpc.c

   1// SPDX-License-Identifier: GPL-2.0
   2// Copyright (c) 2011-2018, The Linux Foundation. All rights reserved.
   3// Copyright (c) 2018, Linaro Limited
   4
   5#include <linux/completion.h>
   6#include <linux/device.h>
   7#include <linux/dma-buf.h>
   8#include <linux/dma-mapping.h>
   9#include <linux/dma-resv.h>
  10#include <linux/idr.h>
  11#include <linux/list.h>
  12#include <linux/miscdevice.h>
  13#include <linux/module.h>
  14#include <linux/of_address.h>
  15#include <linux/of.h>
  16#include <linux/platform_device.h>
  17#include <linux/sort.h>
  18#include <linux/of_platform.h>
  19#include <linux/rpmsg.h>
  20#include <linux/scatterlist.h>
  21#include <linux/slab.h>
  22#include <linux/firmware/qcom/qcom_scm.h>
  23#include <uapi/misc/fastrpc.h>
  24#include <linux/of_reserved_mem.h>
  25
  26#define ADSP_DOMAIN_ID (0)
  27#define MDSP_DOMAIN_ID (1)
  28#define SDSP_DOMAIN_ID (2)
  29#define CDSP_DOMAIN_ID (3)
  30#define GDSP_DOMAIN_ID (4)
  31#define FASTRPC_MAX_SESSIONS	14
  32#define FASTRPC_MAX_VMIDS	16
  33#define FASTRPC_ALIGN		128
  34#define FASTRPC_MAX_FDLIST	16
  35#define FASTRPC_MAX_CRCLIST	64
  36#define FASTRPC_PHYS(p)	((p) & 0xffffffff)
  37#define FASTRPC_CTX_MAX (256)
  38#define FASTRPC_INIT_HANDLE	1
  39#define FASTRPC_DSP_UTILITIES_HANDLE	2
  40#define FASTRPC_CTXID_MASK (0xFF0)
  41#define INIT_FILELEN_MAX (2 * 1024 * 1024)
  42#define INIT_FILE_NAMELEN_MAX (128)
  43#define FASTRPC_DEVICE_NAME	"fastrpc"
  44
  45/* Add memory to static PD pool, protection thru XPU */
  46#define ADSP_MMAP_HEAP_ADDR  4
  47/* MAP static DMA buffer on DSP User PD */
  48#define ADSP_MMAP_DMA_BUFFER  6
  49/* Add memory to static PD pool protection thru hypervisor */
  50#define ADSP_MMAP_REMOTE_HEAP_ADDR  8
  51/* Add memory to userPD pool, for user heap */
  52#define ADSP_MMAP_ADD_PAGES 0x1000
  53/* Add memory to userPD pool, for LLC heap */
  54#define ADSP_MMAP_ADD_PAGES_LLC 0x3000,
  55
  56#define DSP_UNSUPPORTED_API (0x80000414)
  57/* MAX NUMBER of DSP ATTRIBUTES SUPPORTED */
  58#define FASTRPC_MAX_DSP_ATTRIBUTES (256)
  59#define FASTRPC_MAX_DSP_ATTRIBUTES_LEN (sizeof(u32) * FASTRPC_MAX_DSP_ATTRIBUTES)
  60
  61/* Retrives number of input buffers from the scalars parameter */
  62#define REMOTE_SCALARS_INBUFS(sc)	(((sc) >> 16) & 0x0ff)
  63
  64/* Retrives number of output buffers from the scalars parameter */
  65#define REMOTE_SCALARS_OUTBUFS(sc)	(((sc) >> 8) & 0x0ff)
  66
  67/* Retrives number of input handles from the scalars parameter */
  68#define REMOTE_SCALARS_INHANDLES(sc)	(((sc) >> 4) & 0x0f)
  69
  70/* Retrives number of output handles from the scalars parameter */
  71#define REMOTE_SCALARS_OUTHANDLES(sc)	((sc) & 0x0f)
  72
  73#define REMOTE_SCALARS_LENGTH(sc)	(REMOTE_SCALARS_INBUFS(sc) +   \
  74					 REMOTE_SCALARS_OUTBUFS(sc) +  \
  75					 REMOTE_SCALARS_INHANDLES(sc)+ \
  76					 REMOTE_SCALARS_OUTHANDLES(sc))
  77#define FASTRPC_BUILD_SCALARS(attr, method, in, out, oin, oout)  \
  78				(((attr & 0x07) << 29) |		\
  79				((method & 0x1f) << 24) |	\
  80				((in & 0xff) << 16) |		\
  81				((out & 0xff) <<  8) |		\
  82				((oin & 0x0f) <<  4) |		\
  83				(oout & 0x0f))
  84
  85#define FASTRPC_SCALARS(method, in, out) \
  86		FASTRPC_BUILD_SCALARS(0, method, in, out, 0, 0)
  87
  88#define FASTRPC_CREATE_PROCESS_NARGS	6
  89#define FASTRPC_CREATE_STATIC_PROCESS_NARGS	3
  90/* Remote Method id table */
  91#define FASTRPC_RMID_INIT_ATTACH	0
  92#define FASTRPC_RMID_INIT_RELEASE	1
  93#define FASTRPC_RMID_INIT_MMAP		4
  94#define FASTRPC_RMID_INIT_MUNMAP	5
  95#define FASTRPC_RMID_INIT_CREATE	6
  96#define FASTRPC_RMID_INIT_CREATE_ATTR	7
  97#define FASTRPC_RMID_INIT_CREATE_STATIC	8
  98#define FASTRPC_RMID_INIT_MEM_MAP      10
  99#define FASTRPC_RMID_INIT_MEM_UNMAP    11
 100
 101/* Protection Domain(PD) ids */
 102#define ROOT_PD		(0)
 103#define USER_PD		(1)
 104#define SENSORS_PD	(2)
 105
 106#define miscdev_to_fdevice(d) container_of(d, struct fastrpc_device, miscdev)
 107
 108struct fastrpc_phy_page {
 109	u64 addr;		/* physical address */
 110	u64 size;		/* size of contiguous region */
 111};
 112
 113struct fastrpc_invoke_buf {
 114	u32 num;		/* number of contiguous regions */
 115	u32 pgidx;		/* index to start of contiguous region */
 116};
 117
 118struct fastrpc_remote_dmahandle {
 119	s32 fd;		/* dma handle fd */
 120	u32 offset;	/* dma handle offset */
 121	u32 len;	/* dma handle length */
 122};
 123
 124struct fastrpc_remote_buf {
 125	u64 pv;		/* buffer pointer */
 126	u64 len;	/* length of buffer */
 127};
 128
 129union fastrpc_remote_arg {
 130	struct fastrpc_remote_buf buf;
 131	struct fastrpc_remote_dmahandle dma;
 132};
 133
 134struct fastrpc_mmap_rsp_msg {
 135	u64 vaddr;
 136};
 137
 138struct fastrpc_mmap_req_msg {
 139	s32 client_id;
 140	u32 flags;
 141	u64 vaddr;
 142	s32 num;
 143};
 144
 145struct fastrpc_mem_map_req_msg {
 146	s32 client_id;
 147	s32 fd;
 148	s32 offset;
 149	u32 flags;
 150	u64 vaddrin;
 151	s32 num;
 152	s32 data_len;
 153};
 154
 155struct fastrpc_munmap_req_msg {
 156	s32 client_id;
 157	u64 vaddr;
 158	u64 size;
 159};
 160
 161struct fastrpc_mem_unmap_req_msg {
 162	s32 client_id;
 163	s32 fd;
 164	u64 vaddrin;
 165	u64 len;
 166};
 167
 168struct fastrpc_msg {
 169	int client_id;		/* process client id */
 170	int tid;		/* thread id */
 171	u64 ctx;		/* invoke caller context */
 172	u32 handle;	/* handle to invoke */
 173	u32 sc;		/* scalars structure describing the data */
 174	u64 addr;		/* physical address */
 175	u64 size;		/* size of contiguous region */
 176};
 177
 178struct fastrpc_invoke_rsp {
 179	u64 ctx;		/* invoke caller context */
 180	int retval;		/* invoke return value */
 181};
 182
 183struct fastrpc_buf_overlap {
 184	u64 start;
 185	u64 end;
 186	int raix;
 187	u64 mstart;
 188	u64 mend;
 189	u64 offset;
 190};
 191
 192struct fastrpc_buf {
 193	struct fastrpc_user *fl;
 194	struct dma_buf *dmabuf;
 195	struct device *dev;
 196	void *virt;
 197	u64 phys;
 198	u64 size;
 199	/* Lock for dma buf attachments */
 200	struct mutex lock;
 201	struct list_head attachments;
 202	/* mmap support */
 203	struct list_head node; /* list of user requested mmaps */
 204	uintptr_t raddr;
 205};
 206
 207struct fastrpc_dma_buf_attachment {
 208	struct device *dev;
 209	struct sg_table sgt;
 210	struct list_head node;
 211};
 212
 213struct fastrpc_map {
 214	struct list_head node;
 215	struct fastrpc_user *fl;
 216	int fd;
 217	struct dma_buf *buf;
 218	struct sg_table *table;
 219	struct dma_buf_attachment *attach;
 220	u64 phys;
 221	u64 size;
 222	void *va;
 223	u64 len;
 224	u64 raddr;
 225	u32 attr;
 226	struct kref refcount;
 227};
 228
 229struct fastrpc_invoke_ctx {
 230	int nscalars;
 231	int nbufs;
 232	int retval;
 233	int pid;
 234	int client_id;
 235	u32 sc;
 236	u32 *crc;
 237	u64 ctxid;
 238	u64 msg_sz;
 239	struct kref refcount;
 240	struct list_head node; /* list of ctxs */
 241	struct completion work;
 242	struct work_struct put_work;
 243	struct fastrpc_msg msg;
 244	struct fastrpc_user *fl;
 245	union fastrpc_remote_arg *rpra;
 246	struct fastrpc_map **maps;
 247	struct fastrpc_buf *buf;
 248	struct fastrpc_invoke_args *args;
 249	struct fastrpc_buf_overlap *olaps;
 250	struct fastrpc_channel_ctx *cctx;
 251};
 252
 253struct fastrpc_session_ctx {
 254	struct device *dev;
 255	int sid;
 256	bool used;
 257	bool valid;
 258};
 259
 260struct fastrpc_channel_ctx {
 261	int domain_id;
 262	int sesscount;
 263	int vmcount;
 264	struct qcom_scm_vmperm vmperms[FASTRPC_MAX_VMIDS];
 265	struct rpmsg_device *rpdev;
 266	struct fastrpc_session_ctx session[FASTRPC_MAX_SESSIONS];
 267	spinlock_t lock;
 268	struct idr ctx_idr;
 269	struct list_head users;
 270	struct kref refcount;
 271	/* Flag if dsp attributes are cached */
 272	bool valid_attributes;
 273	u32 dsp_attributes[FASTRPC_MAX_DSP_ATTRIBUTES];
 274	struct fastrpc_device *secure_fdevice;
 275	struct fastrpc_device *fdevice;
 276	struct fastrpc_buf *remote_heap;
 277	struct list_head invoke_interrupted_mmaps;
 278	bool secure;
 279	bool unsigned_support;
 280	u64 dma_mask;
 281};
 282
 283struct fastrpc_device {
 284	struct fastrpc_channel_ctx *cctx;
 285	struct miscdevice miscdev;
 286	bool secure;
 287};
 288
 289struct fastrpc_user {
 290	struct list_head user;
 291	struct list_head maps;
 292	struct list_head pending;
 293	struct list_head mmaps;
 294
 295	struct fastrpc_channel_ctx *cctx;
 296	struct fastrpc_session_ctx *sctx;
 297	struct fastrpc_buf *init_mem;
 298
 299	int client_id;
 300	int pd;
 301	bool is_secure_dev;
 302	/* Lock for lists */
 303	spinlock_t lock;
 304	/* lock for allocations */
 305	struct mutex mutex;
 306};
 307
 308static void fastrpc_free_map(struct kref *ref)
 309{
 310	struct fastrpc_map *map;
 311
 312	map = container_of(ref, struct fastrpc_map, refcount);
 313
 314	if (map->table) {
 315		if (map->attr & FASTRPC_ATTR_SECUREMAP) {
 316			struct qcom_scm_vmperm perm;
 317			int vmid = map->fl->cctx->vmperms[0].vmid;
 318			u64 src_perms = BIT(QCOM_SCM_VMID_HLOS) | BIT(vmid);
 319			int err = 0;
 320
 321			perm.vmid = QCOM_SCM_VMID_HLOS;
 322			perm.perm = QCOM_SCM_PERM_RWX;
 323			err = qcom_scm_assign_mem(map->phys, map->len,
 324				&src_perms, &perm, 1);
 325			if (err) {
 326				dev_err(map->fl->sctx->dev, "Failed to assign memory phys 0x%llx size 0x%llx err %d\n",
 327						map->phys, map->len, err);
 328				return;
 329			}
 330		}
 331		dma_buf_unmap_attachment_unlocked(map->attach, map->table,
 332						  DMA_BIDIRECTIONAL);
 333		dma_buf_detach(map->buf, map->attach);
 334		dma_buf_put(map->buf);
 335	}
 336
 337	if (map->fl) {
 338		spin_lock(&map->fl->lock);
 339		list_del(&map->node);
 340		spin_unlock(&map->fl->lock);
 341		map->fl = NULL;
 342	}
 343
 344	kfree(map);
 345}
 346
 347static void fastrpc_map_put(struct fastrpc_map *map)
 348{
 349	if (map)
 350		kref_put(&map->refcount, fastrpc_free_map);
 351}
 352
 353static int fastrpc_map_get(struct fastrpc_map *map)
 354{
 355	if (!map)
 356		return -ENOENT;
 357
 358	return kref_get_unless_zero(&map->refcount) ? 0 : -ENOENT;
 359}
 360
 361
 362static int fastrpc_map_lookup(struct fastrpc_user *fl, int fd,
 363			    struct fastrpc_map **ppmap)
 364{
 365	struct fastrpc_map *map = NULL;
 366	struct dma_buf *buf;
 367	int ret = -ENOENT;
 368
 369	buf = dma_buf_get(fd);
 370	if (IS_ERR(buf))
 371		return PTR_ERR(buf);
 372
 373	spin_lock(&fl->lock);
 374	list_for_each_entry(map, &fl->maps, node) {
 375		if (map->fd != fd || map->buf != buf)
 376			continue;
 377
 378		*ppmap = map;
 379		ret = 0;
 380		break;
 381	}
 382	spin_unlock(&fl->lock);
 383
 384	dma_buf_put(buf);
 385
 386	return ret;
 387}
 388
 389static void fastrpc_buf_free(struct fastrpc_buf *buf)
 390{
 391	dma_free_coherent(buf->dev, buf->size, buf->virt,
 392			  FASTRPC_PHYS(buf->phys));
 393	kfree(buf);
 394}
 395
 396static int __fastrpc_buf_alloc(struct fastrpc_user *fl, struct device *dev,
 397			     u64 size, struct fastrpc_buf **obuf)
 398{
 399	struct fastrpc_buf *buf;
 400
 401	buf = kzalloc(sizeof(*buf), GFP_KERNEL);
 402	if (!buf)
 403		return -ENOMEM;
 404
 405	INIT_LIST_HEAD(&buf->attachments);
 406	INIT_LIST_HEAD(&buf->node);
 407	mutex_init(&buf->lock);
 408
 409	buf->fl = fl;
 410	buf->virt = NULL;
 411	buf->phys = 0;
 412	buf->size = size;
 413	buf->dev = dev;
 414	buf->raddr = 0;
 415
 416	buf->virt = dma_alloc_coherent(dev, buf->size, (dma_addr_t *)&buf->phys,
 417				       GFP_KERNEL);
 418	if (!buf->virt) {
 419		mutex_destroy(&buf->lock);
 420		kfree(buf);
 421		return -ENOMEM;
 422	}
 423
 424	*obuf = buf;
 425
 426	return 0;
 427}
 428
 429static int fastrpc_buf_alloc(struct fastrpc_user *fl, struct device *dev,
 430			     u64 size, struct fastrpc_buf **obuf)
 431{
 432	int ret;
 433	struct fastrpc_buf *buf;
 434
 435	ret = __fastrpc_buf_alloc(fl, dev, size, obuf);
 436	if (ret)
 437		return ret;
 438
 439	buf = *obuf;
 440
 441	if (fl->sctx && fl->sctx->sid)
 442		buf->phys += ((u64)fl->sctx->sid << 32);
 443
 444	return 0;
 445}
 446
 447static int fastrpc_remote_heap_alloc(struct fastrpc_user *fl, struct device *dev,
 448				     u64 size, struct fastrpc_buf **obuf)
 449{
 450	struct device *rdev = &fl->cctx->rpdev->dev;
 451
 452	return  __fastrpc_buf_alloc(fl, rdev, size, obuf);
 453}
 454
 455static void fastrpc_channel_ctx_free(struct kref *ref)
 456{
 457	struct fastrpc_channel_ctx *cctx;
 458
 459	cctx = container_of(ref, struct fastrpc_channel_ctx, refcount);
 460
 461	kfree(cctx);
 462}
 463
 464static void fastrpc_channel_ctx_get(struct fastrpc_channel_ctx *cctx)
 465{
 466	kref_get(&cctx->refcount);
 467}
 468
 469static void fastrpc_channel_ctx_put(struct fastrpc_channel_ctx *cctx)
 470{
 471	kref_put(&cctx->refcount, fastrpc_channel_ctx_free);
 472}
 473
 474static void fastrpc_context_free(struct kref *ref)
 475{
 476	struct fastrpc_invoke_ctx *ctx;
 477	struct fastrpc_channel_ctx *cctx;
 478	unsigned long flags;
 479	int i;
 480
 481	ctx = container_of(ref, struct fastrpc_invoke_ctx, refcount);
 482	cctx = ctx->cctx;
 483
 484	for (i = 0; i < ctx->nbufs; i++)
 485		fastrpc_map_put(ctx->maps[i]);
 486
 487	if (ctx->buf)
 488		fastrpc_buf_free(ctx->buf);
 489
 490	spin_lock_irqsave(&cctx->lock, flags);
 491	idr_remove(&cctx->ctx_idr, ctx->ctxid >> 4);
 492	spin_unlock_irqrestore(&cctx->lock, flags);
 493
 494	kfree(ctx->maps);
 495	kfree(ctx->olaps);
 496	kfree(ctx);
 497
 498	fastrpc_channel_ctx_put(cctx);
 499}
 500
 501static void fastrpc_context_get(struct fastrpc_invoke_ctx *ctx)
 502{
 503	kref_get(&ctx->refcount);
 504}
 505
 506static void fastrpc_context_put(struct fastrpc_invoke_ctx *ctx)
 507{
 508	kref_put(&ctx->refcount, fastrpc_context_free);
 509}
 510
 511static void fastrpc_context_put_wq(struct work_struct *work)
 512{
 513	struct fastrpc_invoke_ctx *ctx =
 514			container_of(work, struct fastrpc_invoke_ctx, put_work);
 515
 516	fastrpc_context_put(ctx);
 517}
 518
 519#define CMP(aa, bb) ((aa) == (bb) ? 0 : (aa) < (bb) ? -1 : 1)
 520static int olaps_cmp(const void *a, const void *b)
 521{
 522	struct fastrpc_buf_overlap *pa = (struct fastrpc_buf_overlap *)a;
 523	struct fastrpc_buf_overlap *pb = (struct fastrpc_buf_overlap *)b;
 524	/* sort with lowest starting buffer first */
 525	int st = CMP(pa->start, pb->start);
 526	/* sort with highest ending buffer first */
 527	int ed = CMP(pb->end, pa->end);
 528
 529	return st == 0 ? ed : st;
 530}
 531
 532static void fastrpc_get_buff_overlaps(struct fastrpc_invoke_ctx *ctx)
 533{
 534	u64 max_end = 0;
 535	int i;
 536
 537	for (i = 0; i < ctx->nbufs; ++i) {
 538		ctx->olaps[i].start = ctx->args[i].ptr;
 539		ctx->olaps[i].end = ctx->olaps[i].start + ctx->args[i].length;
 540		ctx->olaps[i].raix = i;
 541	}
 542
 543	sort(ctx->olaps, ctx->nbufs, sizeof(*ctx->olaps), olaps_cmp, NULL);
 544
 545	for (i = 0; i < ctx->nbufs; ++i) {
 546		/* Falling inside previous range */
 547		if (ctx->olaps[i].start < max_end) {
 548			ctx->olaps[i].mstart = max_end;
 549			ctx->olaps[i].mend = ctx->olaps[i].end;
 550			ctx->olaps[i].offset = max_end - ctx->olaps[i].start;
 551
 552			if (ctx->olaps[i].end > max_end) {
 553				max_end = ctx->olaps[i].end;
 554			} else {
 555				ctx->olaps[i].mend = 0;
 556				ctx->olaps[i].mstart = 0;
 557			}
 558
 559		} else  {
 560			ctx->olaps[i].mend = ctx->olaps[i].end;
 561			ctx->olaps[i].mstart = ctx->olaps[i].start;
 562			ctx->olaps[i].offset = 0;
 563			max_end = ctx->olaps[i].end;
 564		}
 565	}
 566}
 567
 568static struct fastrpc_invoke_ctx *fastrpc_context_alloc(
 569			struct fastrpc_user *user, u32 kernel, u32 sc,
 570			struct fastrpc_invoke_args *args)
 571{
 572	struct fastrpc_channel_ctx *cctx = user->cctx;
 573	struct fastrpc_invoke_ctx *ctx = NULL;
 574	unsigned long flags;
 575	int ret;
 576
 577	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
 578	if (!ctx)
 579		return ERR_PTR(-ENOMEM);
 580
 581	INIT_LIST_HEAD(&ctx->node);
 582	ctx->fl = user;
 583	ctx->nscalars = REMOTE_SCALARS_LENGTH(sc);
 584	ctx->nbufs = REMOTE_SCALARS_INBUFS(sc) +
 585		     REMOTE_SCALARS_OUTBUFS(sc);
 586
 587	if (ctx->nscalars) {
 588		ctx->maps = kcalloc(ctx->nscalars,
 589				    sizeof(*ctx->maps), GFP_KERNEL);
 590		if (!ctx->maps) {
 591			kfree(ctx);
 592			return ERR_PTR(-ENOMEM);
 593		}
 594		ctx->olaps = kcalloc(ctx->nscalars,
 595				    sizeof(*ctx->olaps), GFP_KERNEL);
 596		if (!ctx->olaps) {
 597			kfree(ctx->maps);
 598			kfree(ctx);
 599			return ERR_PTR(-ENOMEM);
 600		}
 601		ctx->args = args;
 602		fastrpc_get_buff_overlaps(ctx);
 603	}
 604
 605	/* Released in fastrpc_context_put() */
 606	fastrpc_channel_ctx_get(cctx);
 607
 608	ctx->sc = sc;
 609	ctx->retval = -1;
 610	ctx->pid = current->pid;
 611	ctx->client_id = user->client_id;
 612	ctx->cctx = cctx;
 613	init_completion(&ctx->work);
 614	INIT_WORK(&ctx->put_work, fastrpc_context_put_wq);
 615
 616	spin_lock(&user->lock);
 617	list_add_tail(&ctx->node, &user->pending);
 618	spin_unlock(&user->lock);
 619
 620	spin_lock_irqsave(&cctx->lock, flags);
 621	ret = idr_alloc_cyclic(&cctx->ctx_idr, ctx, 1,
 622			       FASTRPC_CTX_MAX, GFP_ATOMIC);
 623	if (ret < 0) {
 624		spin_unlock_irqrestore(&cctx->lock, flags);
 625		goto err_idr;
 626	}
 627	ctx->ctxid = ret << 4;
 628	spin_unlock_irqrestore(&cctx->lock, flags);
 629
 630	kref_init(&ctx->refcount);
 631
 632	return ctx;
 633err_idr:
 634	spin_lock(&user->lock);
 635	list_del(&ctx->node);
 636	spin_unlock(&user->lock);
 637	fastrpc_channel_ctx_put(cctx);
 638	kfree(ctx->maps);
 639	kfree(ctx->olaps);
 640	kfree(ctx);
 641
 642	return ERR_PTR(ret);
 643}
 644
 645static struct sg_table *
 646fastrpc_map_dma_buf(struct dma_buf_attachment *attachment,
 647		    enum dma_data_direction dir)
 648{
 649	struct fastrpc_dma_buf_attachment *a = attachment->priv;
 650	struct sg_table *table;
 651	int ret;
 652
 653	table = &a->sgt;
 654
 655	ret = dma_map_sgtable(attachment->dev, table, dir, 0);
 656	if (ret)
 657		table = ERR_PTR(ret);
 658	return table;
 659}
 660
 661static void fastrpc_unmap_dma_buf(struct dma_buf_attachment *attach,
 662				  struct sg_table *table,
 663				  enum dma_data_direction dir)
 664{
 665	dma_unmap_sgtable(attach->dev, table, dir, 0);
 666}
 667
 668static void fastrpc_release(struct dma_buf *dmabuf)
 669{
 670	struct fastrpc_buf *buffer = dmabuf->priv;
 671
 672	fastrpc_buf_free(buffer);
 673}
 674
 675static int fastrpc_dma_buf_attach(struct dma_buf *dmabuf,
 676				  struct dma_buf_attachment *attachment)
 677{
 678	struct fastrpc_dma_buf_attachment *a;
 679	struct fastrpc_buf *buffer = dmabuf->priv;
 680	int ret;
 681
 682	a = kzalloc(sizeof(*a), GFP_KERNEL);
 683	if (!a)
 684		return -ENOMEM;
 685
 686	ret = dma_get_sgtable(buffer->dev, &a->sgt, buffer->virt,
 687			      FASTRPC_PHYS(buffer->phys), buffer->size);
 688	if (ret < 0) {
 689		dev_err(buffer->dev, "failed to get scatterlist from DMA API\n");
 690		kfree(a);
 691		return -EINVAL;
 692	}
 693
 694	a->dev = attachment->dev;
 695	INIT_LIST_HEAD(&a->node);
 696	attachment->priv = a;
 697
 698	mutex_lock(&buffer->lock);
 699	list_add(&a->node, &buffer->attachments);
 700	mutex_unlock(&buffer->lock);
 701
 702	return 0;
 703}
 704
 705static void fastrpc_dma_buf_detatch(struct dma_buf *dmabuf,
 706				    struct dma_buf_attachment *attachment)
 707{
 708	struct fastrpc_dma_buf_attachment *a = attachment->priv;
 709	struct fastrpc_buf *buffer = dmabuf->priv;
 710
 711	mutex_lock(&buffer->lock);
 712	list_del(&a->node);
 713	mutex_unlock(&buffer->lock);
 714	sg_free_table(&a->sgt);
 715	kfree(a);
 716}
 717
 718static int fastrpc_vmap(struct dma_buf *dmabuf, struct iosys_map *map)
 719{
 720	struct fastrpc_buf *buf = dmabuf->priv;
 721
 722	iosys_map_set_vaddr(map, buf->virt);
 723
 724	return 0;
 725}
 726
 727static int fastrpc_mmap(struct dma_buf *dmabuf,
 728			struct vm_area_struct *vma)
 729{
 730	struct fastrpc_buf *buf = dmabuf->priv;
 731	size_t size = vma->vm_end - vma->vm_start;
 732
 733	dma_resv_assert_held(dmabuf->resv);
 734
 735	return dma_mmap_coherent(buf->dev, vma, buf->virt,
 736				 FASTRPC_PHYS(buf->phys), size);
 737}
 738
 739static const struct dma_buf_ops fastrpc_dma_buf_ops = {
 740	.attach = fastrpc_dma_buf_attach,
 741	.detach = fastrpc_dma_buf_detatch,
 742	.map_dma_buf = fastrpc_map_dma_buf,
 743	.unmap_dma_buf = fastrpc_unmap_dma_buf,
 744	.mmap = fastrpc_mmap,
 745	.vmap = fastrpc_vmap,
 746	.release = fastrpc_release,
 747};
 748
 749static int fastrpc_map_attach(struct fastrpc_user *fl, int fd,
 750			      u64 len, u32 attr, struct fastrpc_map **ppmap)
 751{
 752	struct fastrpc_session_ctx *sess = fl->sctx;
 753	struct fastrpc_map *map = NULL;
 754	struct sg_table *table;
 755	struct scatterlist *sgl = NULL;
 756	int err = 0, sgl_index = 0;
 757
 758	map = kzalloc(sizeof(*map), GFP_KERNEL);
 759	if (!map)
 760		return -ENOMEM;
 761
 762	INIT_LIST_HEAD(&map->node);
 763	kref_init(&map->refcount);
 764
 765	map->fl = fl;
 766	map->fd = fd;
 767	map->buf = dma_buf_get(fd);
 768	if (IS_ERR(map->buf)) {
 769		err = PTR_ERR(map->buf);
 770		goto get_err;
 771	}
 772
 773	map->attach = dma_buf_attach(map->buf, sess->dev);
 774	if (IS_ERR(map->attach)) {
 775		dev_err(sess->dev, "Failed to attach dmabuf\n");
 776		err = PTR_ERR(map->attach);
 777		goto attach_err;
 778	}
 779
 780	table = dma_buf_map_attachment_unlocked(map->attach, DMA_BIDIRECTIONAL);
 781	if (IS_ERR(table)) {
 782		err = PTR_ERR(table);
 783		goto map_err;
 784	}
 785	map->table = table;
 786
 787	if (attr & FASTRPC_ATTR_SECUREMAP) {
 788		map->phys = sg_phys(map->table->sgl);
 789	} else {
 790		map->phys = sg_dma_address(map->table->sgl);
 791		map->phys += ((u64)fl->sctx->sid << 32);
 792	}
 793	for_each_sg(map->table->sgl, sgl, map->table->nents,
 794		sgl_index)
 795		map->size += sg_dma_len(sgl);
 796	if (len > map->size) {
 797		dev_dbg(sess->dev, "Bad size passed len 0x%llx map size 0x%llx\n",
 798				len, map->size);
 799		err = -EINVAL;
 800		goto map_err;
 801	}
 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->len, &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->len, 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
 832map_err:
 833	dma_buf_detach(map->buf, map->attach);
 834attach_err:
 835	dma_buf_put(map->buf);
 836get_err:
 837	fastrpc_map_put(map);
 838
 839	return err;
 840}
 841
 842static int fastrpc_map_create(struct fastrpc_user *fl, int fd,
 843			      u64 len, u32 attr, struct fastrpc_map **ppmap)
 844{
 845	struct fastrpc_session_ctx *sess = fl->sctx;
 846	int err = 0;
 847
 848	if (!fastrpc_map_lookup(fl, fd, ppmap)) {
 849		if (!fastrpc_map_get(*ppmap))
 850			return 0;
 851		dev_dbg(sess->dev, "%s: Failed to get map fd=%d\n",
 852			__func__, fd);
 853	}
 854
 855	err = fastrpc_map_attach(fl, fd, len, attr, ppmap);
 856
 857	return err;
 858}
 859
 860/*
 861 * Fastrpc payload buffer with metadata looks like:
 862 *
 863 * >>>>>>  START of METADATA <<<<<<<<<
 864 * +---------------------------------+
 865 * |           Arguments             |
 866 * | type:(union fastrpc_remote_arg)|
 867 * |             (0 - N)             |
 868 * +---------------------------------+
 869 * |         Invoke Buffer list      |
 870 * | type:(struct fastrpc_invoke_buf)|
 871 * |           (0 - N)               |
 872 * +---------------------------------+
 873 * |         Page info list          |
 874 * | type:(struct fastrpc_phy_page)  |
 875 * |             (0 - N)             |
 876 * +---------------------------------+
 877 * |         Optional info           |
 878 * |(can be specific to SoC/Firmware)|
 879 * +---------------------------------+
 880 * >>>>>>>>  END of METADATA <<<<<<<<<
 881 * +---------------------------------+
 882 * |         Inline ARGS             |
 883 * |            (0-N)                |
 884 * +---------------------------------+
 885 */
 886
 887static int fastrpc_get_meta_size(struct fastrpc_invoke_ctx *ctx)
 888{
 889	int size = 0;
 890
 891	size = (sizeof(struct fastrpc_remote_buf) +
 892		sizeof(struct fastrpc_invoke_buf) +
 893		sizeof(struct fastrpc_phy_page)) * ctx->nscalars +
 894		sizeof(u64) * FASTRPC_MAX_FDLIST +
 895		sizeof(u32) * FASTRPC_MAX_CRCLIST;
 896
 897	return size;
 898}
 899
 900static u64 fastrpc_get_payload_size(struct fastrpc_invoke_ctx *ctx, int metalen)
 901{
 902	u64 size = 0;
 903	int oix;
 904
 905	size = ALIGN(metalen, FASTRPC_ALIGN);
 906	for (oix = 0; oix < ctx->nbufs; oix++) {
 907		int i = ctx->olaps[oix].raix;
 908
 909		if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1) {
 910
 911			if (ctx->olaps[oix].offset == 0)
 912				size = ALIGN(size, FASTRPC_ALIGN);
 913
 914			size += (ctx->olaps[oix].mend - ctx->olaps[oix].mstart);
 915		}
 916	}
 917
 918	return size;
 919}
 920
 921static int fastrpc_create_maps(struct fastrpc_invoke_ctx *ctx)
 922{
 923	struct device *dev = ctx->fl->sctx->dev;
 924	int i, err;
 925
 926	for (i = 0; i < ctx->nscalars; ++i) {
 927
 928		if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1 ||
 929		    ctx->args[i].length == 0)
 930			continue;
 931
 932		if (i < ctx->nbufs)
 933			err = fastrpc_map_create(ctx->fl, ctx->args[i].fd,
 934				 ctx->args[i].length, ctx->args[i].attr, &ctx->maps[i]);
 935		else
 936			err = fastrpc_map_attach(ctx->fl, ctx->args[i].fd,
 937				 ctx->args[i].length, ctx->args[i].attr, &ctx->maps[i]);
 938		if (err) {
 939			dev_err(dev, "Error Creating map %d\n", err);
 940			return -EINVAL;
 941		}
 942
 943	}
 944	return 0;
 945}
 946
 947static struct fastrpc_invoke_buf *fastrpc_invoke_buf_start(union fastrpc_remote_arg *pra, int len)
 948{
 949	return (struct fastrpc_invoke_buf *)(&pra[len]);
 950}
 951
 952static struct fastrpc_phy_page *fastrpc_phy_page_start(struct fastrpc_invoke_buf *buf, int len)
 953{
 954	return (struct fastrpc_phy_page *)(&buf[len]);
 955}
 956
 957static int fastrpc_get_args(u32 kernel, struct fastrpc_invoke_ctx *ctx)
 958{
 959	struct device *dev = ctx->fl->sctx->dev;
 960	union fastrpc_remote_arg *rpra;
 961	struct fastrpc_invoke_buf *list;
 962	struct fastrpc_phy_page *pages;
 963	int inbufs, i, oix, err = 0;
 964	u64 len, rlen, pkt_size;
 965	u64 pg_start, pg_end;
 966	uintptr_t args;
 967	int metalen;
 968
 969	inbufs = REMOTE_SCALARS_INBUFS(ctx->sc);
 970	metalen = fastrpc_get_meta_size(ctx);
 971	pkt_size = fastrpc_get_payload_size(ctx, metalen);
 972
 973	err = fastrpc_create_maps(ctx);
 974	if (err)
 975		return err;
 976
 977	ctx->msg_sz = pkt_size;
 978
 979	if (ctx->fl->sctx->sid)
 980		err = fastrpc_buf_alloc(ctx->fl, dev, pkt_size, &ctx->buf);
 981	else
 982		err = fastrpc_remote_heap_alloc(ctx->fl, dev, pkt_size, &ctx->buf);
 983	if (err)
 984		return err;
 985
 986	memset(ctx->buf->virt, 0, pkt_size);
 987	rpra = ctx->buf->virt;
 988	list = fastrpc_invoke_buf_start(rpra, ctx->nscalars);
 989	pages = fastrpc_phy_page_start(list, ctx->nscalars);
 990	args = (uintptr_t)ctx->buf->virt + metalen;
 991	rlen = pkt_size - metalen;
 992	ctx->rpra = rpra;
 993
 994	for (oix = 0; oix < ctx->nbufs; ++oix) {
 995		int mlen;
 996
 997		i = ctx->olaps[oix].raix;
 998		len = ctx->args[i].length;
 999
1000		rpra[i].buf.pv = 0;
1001		rpra[i].buf.len = len;
1002		list[i].num = len ? 1 : 0;
1003		list[i].pgidx = i;
1004
1005		if (!len)
1006			continue;
1007
1008		if (ctx->maps[i]) {
1009			struct vm_area_struct *vma = NULL;
1010
1011			rpra[i].buf.pv = (u64) ctx->args[i].ptr;
1012			pages[i].addr = ctx->maps[i]->phys;
1013
1014			mmap_read_lock(current->mm);
1015			vma = find_vma(current->mm, ctx->args[i].ptr);
1016			if (vma)
1017				pages[i].addr += (ctx->args[i].ptr & PAGE_MASK) -
1018						 vma->vm_start;
1019			mmap_read_unlock(current->mm);
1020
1021			pg_start = (ctx->args[i].ptr & PAGE_MASK) >> PAGE_SHIFT;
1022			pg_end = ((ctx->args[i].ptr + len - 1) & PAGE_MASK) >>
1023				  PAGE_SHIFT;
1024			pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE;
1025
1026		} else {
1027
1028			if (ctx->olaps[oix].offset == 0) {
1029				rlen -= ALIGN(args, FASTRPC_ALIGN) - args;
1030				args = ALIGN(args, FASTRPC_ALIGN);
1031			}
1032
1033			mlen = ctx->olaps[oix].mend - ctx->olaps[oix].mstart;
1034
1035			if (rlen < mlen)
1036				goto bail;
1037
1038			rpra[i].buf.pv = args - ctx->olaps[oix].offset;
1039			pages[i].addr = ctx->buf->phys -
1040					ctx->olaps[oix].offset +
1041					(pkt_size - rlen);
1042			pages[i].addr = pages[i].addr &	PAGE_MASK;
1043
1044			pg_start = (rpra[i].buf.pv & PAGE_MASK) >> PAGE_SHIFT;
1045			pg_end = ((rpra[i].buf.pv + len - 1) & PAGE_MASK) >> PAGE_SHIFT;
1046			pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE;
1047			args = args + mlen;
1048			rlen -= mlen;
1049		}
1050
1051		if (i < inbufs && !ctx->maps[i]) {
1052			void *dst = (void *)(uintptr_t)rpra[i].buf.pv;
1053			void *src = (void *)(uintptr_t)ctx->args[i].ptr;
1054
1055			if (!kernel) {
1056				if (copy_from_user(dst, (void __user *)src,
1057						   len)) {
1058					err = -EFAULT;
1059					goto bail;
1060				}
1061			} else {
1062				memcpy(dst, src, len);
1063			}
1064		}
1065	}
1066
1067	for (i = ctx->nbufs; i < ctx->nscalars; ++i) {
1068		list[i].num = ctx->args[i].length ? 1 : 0;
1069		list[i].pgidx = i;
1070		if (ctx->maps[i]) {
1071			pages[i].addr = ctx->maps[i]->phys;
1072			pages[i].size = ctx->maps[i]->size;
1073		}
1074		rpra[i].dma.fd = ctx->args[i].fd;
1075		rpra[i].dma.len = ctx->args[i].length;
1076		rpra[i].dma.offset = (u64) ctx->args[i].ptr;
1077	}
1078
1079bail:
1080	if (err)
1081		dev_err(dev, "Error: get invoke args failed:%d\n", err);
1082
1083	return err;
1084}
1085
1086static int fastrpc_put_args(struct fastrpc_invoke_ctx *ctx,
1087			    u32 kernel)
1088{
1089	union fastrpc_remote_arg *rpra = ctx->rpra;
1090	struct fastrpc_user *fl = ctx->fl;
1091	struct fastrpc_map *mmap = NULL;
1092	struct fastrpc_invoke_buf *list;
1093	struct fastrpc_phy_page *pages;
1094	u64 *fdlist;
1095	int i, inbufs, outbufs, handles;
1096	int ret = 0;
1097
1098	inbufs = REMOTE_SCALARS_INBUFS(ctx->sc);
1099	outbufs = REMOTE_SCALARS_OUTBUFS(ctx->sc);
1100	handles = REMOTE_SCALARS_INHANDLES(ctx->sc) + REMOTE_SCALARS_OUTHANDLES(ctx->sc);
1101	list = fastrpc_invoke_buf_start(rpra, ctx->nscalars);
1102	pages = fastrpc_phy_page_start(list, ctx->nscalars);
1103	fdlist = (uint64_t *)(pages + inbufs + outbufs + handles);
1104
1105	for (i = inbufs; i < ctx->nbufs; ++i) {
1106		if (!ctx->maps[i]) {
1107			void *src = (void *)(uintptr_t)rpra[i].buf.pv;
1108			void *dst = (void *)(uintptr_t)ctx->args[i].ptr;
1109			u64 len = rpra[i].buf.len;
1110
1111			if (!kernel) {
1112				if (copy_to_user((void __user *)dst, src, len)) {
1113					ret = -EFAULT;
1114					goto cleanup_fdlist;
1115				}
1116			} else {
1117				memcpy(dst, src, len);
1118			}
1119		}
1120	}
1121
1122cleanup_fdlist:
1123	/* Clean up fdlist which is updated by DSP */
1124	for (i = 0; i < FASTRPC_MAX_FDLIST; i++) {
1125		if (!fdlist[i])
1126			break;
1127		if (!fastrpc_map_lookup(fl, (int)fdlist[i], &mmap))
1128			fastrpc_map_put(mmap);
1129	}
1130
1131	return ret;
1132}
1133
1134static int fastrpc_invoke_send(struct fastrpc_session_ctx *sctx,
1135			       struct fastrpc_invoke_ctx *ctx,
1136			       u32 kernel, uint32_t handle)
1137{
1138	struct fastrpc_channel_ctx *cctx;
1139	struct fastrpc_user *fl = ctx->fl;
1140	struct fastrpc_msg *msg = &ctx->msg;
1141	int ret;
1142
1143	cctx = fl->cctx;
1144	msg->client_id = fl->client_id;
1145	msg->tid = current->pid;
1146
1147	if (kernel)
1148		msg->client_id = 0;
1149
1150	msg->ctx = ctx->ctxid | fl->pd;
1151	msg->handle = handle;
1152	msg->sc = ctx->sc;
1153	msg->addr = ctx->buf ? ctx->buf->phys : 0;
1154	msg->size = roundup(ctx->msg_sz, PAGE_SIZE);
1155	fastrpc_context_get(ctx);
1156
1157	ret = rpmsg_send(cctx->rpdev->ept, (void *)msg, sizeof(*msg));
1158
1159	if (ret)
1160		fastrpc_context_put(ctx);
1161
1162	return ret;
1163
1164}
1165
1166static int fastrpc_internal_invoke(struct fastrpc_user *fl,  u32 kernel,
1167				   u32 handle, u32 sc,
1168				   struct fastrpc_invoke_args *args)
1169{
1170	struct fastrpc_invoke_ctx *ctx = NULL;
1171	struct fastrpc_buf *buf, *b;
1172
1173	int err = 0;
1174
1175	if (!fl->sctx)
1176		return -EINVAL;
1177
1178	if (!fl->cctx->rpdev)
1179		return -EPIPE;
1180
1181	if (handle == FASTRPC_INIT_HANDLE && !kernel) {
1182		dev_warn_ratelimited(fl->sctx->dev, "user app trying to send a kernel RPC message (%d)\n",  handle);
1183		return -EPERM;
1184	}
1185
1186	ctx = fastrpc_context_alloc(fl, kernel, sc, args);
1187	if (IS_ERR(ctx))
1188		return PTR_ERR(ctx);
1189
1190	err = fastrpc_get_args(kernel, ctx);
1191	if (err)
1192		goto bail;
1193
1194	/* make sure that all CPU memory writes are seen by DSP */
1195	dma_wmb();
1196	/* Send invoke buffer to remote dsp */
1197	err = fastrpc_invoke_send(fl->sctx, ctx, kernel, handle);
1198	if (err)
1199		goto bail;
1200
1201	if (kernel) {
1202		if (!wait_for_completion_timeout(&ctx->work, 10 * HZ))
1203			err = -ETIMEDOUT;
1204	} else {
1205		err = wait_for_completion_interruptible(&ctx->work);
1206	}
1207
1208	if (err)
1209		goto bail;
1210
1211	/* make sure that all memory writes by DSP are seen by CPU */
1212	dma_rmb();
1213	/* populate all the output buffers with results */
1214	err = fastrpc_put_args(ctx, kernel);
1215	if (err)
1216		goto bail;
1217
1218	/* Check the response from remote dsp */
1219	err = ctx->retval;
1220	if (err)
1221		goto bail;
1222
1223bail:
1224	if (err != -ERESTARTSYS && err != -ETIMEDOUT) {
1225		/* We are done with this compute context */
1226		spin_lock(&fl->lock);
1227		list_del(&ctx->node);
1228		spin_unlock(&fl->lock);
1229		fastrpc_context_put(ctx);
1230	}
1231
1232	if (err == -ERESTARTSYS) {
1233		list_for_each_entry_safe(buf, b, &fl->mmaps, node) {
1234			list_del(&buf->node);
1235			list_add_tail(&buf->node, &fl->cctx->invoke_interrupted_mmaps);
1236		}
1237	}
1238
1239	if (err)
1240		dev_dbg(fl->sctx->dev, "Error: Invoke Failed %d\n", err);
1241
1242	return err;
1243}
1244
1245static bool is_session_rejected(struct fastrpc_user *fl, bool unsigned_pd_request)
1246{
1247	/* Check if the device node is non-secure and channel is secure*/
1248	if (!fl->is_secure_dev && fl->cctx->secure) {
1249		/*
1250		 * Allow untrusted applications to offload only to Unsigned PD when
1251		 * channel is configured as secure and block untrusted apps on channel
1252		 * that does not support unsigned PD offload
1253		 */
1254		if (!fl->cctx->unsigned_support || !unsigned_pd_request) {
1255			dev_err(&fl->cctx->rpdev->dev, "Error: Untrusted application trying to offload to signed PD\n");
1256			return true;
1257		}
1258	}
1259
1260	return false;
1261}
1262
1263static int fastrpc_init_create_static_process(struct fastrpc_user *fl,
1264					      char __user *argp)
1265{
1266	struct fastrpc_init_create_static init;
1267	struct fastrpc_invoke_args *args;
1268	struct fastrpc_phy_page pages[1];
1269	char *name;
1270	int err;
1271	bool scm_done = false;
1272	struct {
1273		int client_id;
1274		u32 namelen;
1275		u32 pageslen;
1276	} inbuf;
1277	u32 sc;
1278
1279	args = kcalloc(FASTRPC_CREATE_STATIC_PROCESS_NARGS, sizeof(*args), GFP_KERNEL);
1280	if (!args)
1281		return -ENOMEM;
1282
1283	if (copy_from_user(&init, argp, sizeof(init))) {
1284		err = -EFAULT;
1285		goto err;
1286	}
1287
1288	if (init.namelen > INIT_FILE_NAMELEN_MAX) {
1289		err = -EINVAL;
1290		goto err;
1291	}
1292
1293	name = memdup_user(u64_to_user_ptr(init.name), init.namelen);
1294	if (IS_ERR(name)) {
1295		err = PTR_ERR(name);
1296		goto err;
1297	}
1298
1299	if (!fl->cctx->remote_heap) {
1300		err = fastrpc_remote_heap_alloc(fl, fl->sctx->dev, init.memlen,
1301						&fl->cctx->remote_heap);
1302		if (err)
1303			goto err_name;
1304
1305		/* Map if we have any heap VMIDs associated with this ADSP Static Process. */
1306		if (fl->cctx->vmcount) {
1307			u64 src_perms = BIT(QCOM_SCM_VMID_HLOS);
1308
1309			err = qcom_scm_assign_mem(fl->cctx->remote_heap->phys,
1310							(u64)fl->cctx->remote_heap->size,
1311							&src_perms,
1312							fl->cctx->vmperms, fl->cctx->vmcount);
1313			if (err) {
1314				dev_err(fl->sctx->dev, "Failed to assign memory with phys 0x%llx size 0x%llx err %d\n",
1315					fl->cctx->remote_heap->phys, fl->cctx->remote_heap->size, err);
1316				goto err_map;
1317			}
1318			scm_done = true;
1319		}
1320	}
1321
1322	inbuf.client_id = fl->client_id;
1323	inbuf.namelen = init.namelen;
1324	inbuf.pageslen = 0;
1325	fl->pd = USER_PD;
1326
1327	args[0].ptr = (u64)(uintptr_t)&inbuf;
1328	args[0].length = sizeof(inbuf);
1329	args[0].fd = -1;
1330
1331	args[1].ptr = (u64)(uintptr_t)name;
1332	args[1].length = inbuf.namelen;
1333	args[1].fd = -1;
1334
1335	pages[0].addr = fl->cctx->remote_heap->phys;
1336	pages[0].size = fl->cctx->remote_heap->size;
1337
1338	args[2].ptr = (u64)(uintptr_t) pages;
1339	args[2].length = sizeof(*pages);
1340	args[2].fd = -1;
1341
1342	sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE_STATIC, 3, 0);
1343
1344	err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE,
1345				      sc, args);
1346	if (err)
1347		goto err_invoke;
1348
1349	kfree(args);
1350	kfree(name);
1351
1352	return 0;
1353err_invoke:
1354	if (fl->cctx->vmcount && scm_done) {
1355		u64 src_perms = 0;
1356		struct qcom_scm_vmperm dst_perms;
1357		u32 i;
1358
1359		for (i = 0; i < fl->cctx->vmcount; i++)
1360			src_perms |= BIT(fl->cctx->vmperms[i].vmid);
1361
1362		dst_perms.vmid = QCOM_SCM_VMID_HLOS;
1363		dst_perms.perm = QCOM_SCM_PERM_RWX;
1364		err = qcom_scm_assign_mem(fl->cctx->remote_heap->phys,
1365						(u64)fl->cctx->remote_heap->size,
1366						&src_perms, &dst_perms, 1);
1367		if (err)
1368			dev_err(fl->sctx->dev, "Failed to assign memory phys 0x%llx size 0x%llx err %d\n",
1369				fl->cctx->remote_heap->phys, fl->cctx->remote_heap->size, err);
1370	}
1371err_map:
1372	fastrpc_buf_free(fl->cctx->remote_heap);
1373	fl->cctx->remote_heap = NULL;
1374err_name:
1375	kfree(name);
1376err:
1377	kfree(args);
1378
1379	return err;
1380}
1381
1382static int fastrpc_init_create_process(struct fastrpc_user *fl,
1383					char __user *argp)
1384{
1385	struct fastrpc_init_create init;
1386	struct fastrpc_invoke_args *args;
1387	struct fastrpc_phy_page pages[1];
1388	struct fastrpc_map *map = NULL;
1389	struct fastrpc_buf *imem = NULL;
1390	int memlen;
1391	int err;
1392	struct {
1393		int client_id;
1394		u32 namelen;
1395		u32 filelen;
1396		u32 pageslen;
1397		u32 attrs;
1398		u32 siglen;
1399	} inbuf;
1400	u32 sc;
1401	bool unsigned_module = false;
1402
1403	args = kcalloc(FASTRPC_CREATE_PROCESS_NARGS, sizeof(*args), GFP_KERNEL);
1404	if (!args)
1405		return -ENOMEM;
1406
1407	if (copy_from_user(&init, argp, sizeof(init))) {
1408		err = -EFAULT;
1409		goto err;
1410	}
1411
1412	if (init.attrs & FASTRPC_MODE_UNSIGNED_MODULE)
1413		unsigned_module = true;
1414
1415	if (is_session_rejected(fl, unsigned_module)) {
1416		err = -ECONNREFUSED;
1417		goto err;
1418	}
1419
1420	if (init.filelen > INIT_FILELEN_MAX) {
1421		err = -EINVAL;
1422		goto err;
1423	}
1424
1425	inbuf.client_id = fl->client_id;
1426	inbuf.namelen = strlen(current->comm) + 1;
1427	inbuf.filelen = init.filelen;
1428	inbuf.pageslen = 1;
1429	inbuf.attrs = init.attrs;
1430	inbuf.siglen = init.siglen;
1431	fl->pd = USER_PD;
1432
1433	if (init.filelen && init.filefd) {
1434		err = fastrpc_map_create(fl, init.filefd, init.filelen, 0, &map);
1435		if (err)
1436			goto err;
1437	}
1438
1439	memlen = ALIGN(max(INIT_FILELEN_MAX, (int)init.filelen * 4),
1440		       1024 * 1024);
1441	err = fastrpc_buf_alloc(fl, fl->sctx->dev, memlen,
1442				&imem);
1443	if (err)
1444		goto err_alloc;
1445
1446	fl->init_mem = imem;
1447	args[0].ptr = (u64)(uintptr_t)&inbuf;
1448	args[0].length = sizeof(inbuf);
1449	args[0].fd = -1;
1450
1451	args[1].ptr = (u64)(uintptr_t)current->comm;
1452	args[1].length = inbuf.namelen;
1453	args[1].fd = -1;
1454
1455	args[2].ptr = (u64) init.file;
1456	args[2].length = inbuf.filelen;
1457	args[2].fd = init.filefd;
1458
1459	pages[0].addr = imem->phys;
1460	pages[0].size = imem->size;
1461
1462	args[3].ptr = (u64)(uintptr_t) pages;
1463	args[3].length = 1 * sizeof(*pages);
1464	args[3].fd = -1;
1465
1466	args[4].ptr = (u64)(uintptr_t)&inbuf.attrs;
1467	args[4].length = sizeof(inbuf.attrs);
1468	args[4].fd = -1;
1469
1470	args[5].ptr = (u64)(uintptr_t) &inbuf.siglen;
1471	args[5].length = sizeof(inbuf.siglen);
1472	args[5].fd = -1;
1473
1474	sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE, 4, 0);
1475	if (init.attrs)
1476		sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE_ATTR, 4, 0);
1477
1478	err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE,
1479				      sc, args);
1480	if (err)
1481		goto err_invoke;
1482
1483	kfree(args);
1484
1485	return 0;
1486
1487err_invoke:
1488	fl->init_mem = NULL;
1489	fastrpc_buf_free(imem);
1490err_alloc:
1491	fastrpc_map_put(map);
1492err:
1493	kfree(args);
1494
1495	return err;
1496}
1497
1498static struct fastrpc_session_ctx *fastrpc_session_alloc(
1499					struct fastrpc_user *fl)
1500{
1501	struct fastrpc_channel_ctx *cctx = fl->cctx;
1502	struct fastrpc_session_ctx *session = NULL;
1503	unsigned long flags;
1504	int i;
1505
1506	spin_lock_irqsave(&cctx->lock, flags);
1507	for (i = 0; i < cctx->sesscount; i++) {
1508		if (!cctx->session[i].used && cctx->session[i].valid) {
1509			cctx->session[i].used = true;
1510			session = &cctx->session[i];
1511			/* any non-zero ID will work, session_idx + 1 is the simplest one */
1512			fl->client_id = i + 1;
1513			break;
1514		}
1515	}
1516	spin_unlock_irqrestore(&cctx->lock, flags);
1517
1518	return session;
1519}
1520
1521static void fastrpc_session_free(struct fastrpc_channel_ctx *cctx,
1522				 struct fastrpc_session_ctx *session)
1523{
1524	unsigned long flags;
1525
1526	spin_lock_irqsave(&cctx->lock, flags);
1527	session->used = false;
1528	spin_unlock_irqrestore(&cctx->lock, flags);
1529}
1530
1531static int fastrpc_release_current_dsp_process(struct fastrpc_user *fl)
1532{
1533	struct fastrpc_invoke_args args[1];
1534	int client_id = 0;
1535	u32 sc;
1536
1537	client_id = fl->client_id;
1538	args[0].ptr = (u64)(uintptr_t) &client_id;
1539	args[0].length = sizeof(client_id);
1540	args[0].fd = -1;
1541	sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_RELEASE, 1, 0);
1542
1543	return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE,
1544				       sc, &args[0]);
1545}
1546
1547static int fastrpc_device_release(struct inode *inode, struct file *file)
1548{
1549	struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data;
1550	struct fastrpc_channel_ctx *cctx = fl->cctx;
1551	struct fastrpc_invoke_ctx *ctx, *n;
1552	struct fastrpc_map *map, *m;
1553	struct fastrpc_buf *buf, *b;
1554	unsigned long flags;
1555
1556	fastrpc_release_current_dsp_process(fl);
1557
1558	spin_lock_irqsave(&cctx->lock, flags);
1559	list_del(&fl->user);
1560	spin_unlock_irqrestore(&cctx->lock, flags);
1561
1562	if (fl->init_mem)
1563		fastrpc_buf_free(fl->init_mem);
1564
1565	list_for_each_entry_safe(ctx, n, &fl->pending, node) {
1566		list_del(&ctx->node);
1567		fastrpc_context_put(ctx);
1568	}
1569
1570	list_for_each_entry_safe(map, m, &fl->maps, node)
1571		fastrpc_map_put(map);
1572
1573	list_for_each_entry_safe(buf, b, &fl->mmaps, node) {
1574		list_del(&buf->node);
1575		fastrpc_buf_free(buf);
1576	}
1577
1578	fastrpc_session_free(cctx, fl->sctx);
1579	fastrpc_channel_ctx_put(cctx);
1580
1581	mutex_destroy(&fl->mutex);
1582	kfree(fl);
1583	file->private_data = NULL;
1584
1585	return 0;
1586}
1587
1588static int fastrpc_device_open(struct inode *inode, struct file *filp)
1589{
1590	struct fastrpc_channel_ctx *cctx;
1591	struct fastrpc_device *fdevice;
1592	struct fastrpc_user *fl = NULL;
1593	unsigned long flags;
1594
1595	fdevice = miscdev_to_fdevice(filp->private_data);
1596	cctx = fdevice->cctx;
1597
1598	fl = kzalloc(sizeof(*fl), GFP_KERNEL);
1599	if (!fl)
1600		return -ENOMEM;
1601
1602	/* Released in fastrpc_device_release() */
1603	fastrpc_channel_ctx_get(cctx);
1604
1605	filp->private_data = fl;
1606	spin_lock_init(&fl->lock);
1607	mutex_init(&fl->mutex);
1608	INIT_LIST_HEAD(&fl->pending);
1609	INIT_LIST_HEAD(&fl->maps);
1610	INIT_LIST_HEAD(&fl->mmaps);
1611	INIT_LIST_HEAD(&fl->user);
1612	fl->cctx = cctx;
1613	fl->is_secure_dev = fdevice->secure;
1614
1615	fl->sctx = fastrpc_session_alloc(fl);
1616	if (!fl->sctx) {
1617		dev_err(&cctx->rpdev->dev, "No session available\n");
1618		mutex_destroy(&fl->mutex);
1619		kfree(fl);
1620
1621		return -EBUSY;
1622	}
1623
1624	spin_lock_irqsave(&cctx->lock, flags);
1625	list_add_tail(&fl->user, &cctx->users);
1626	spin_unlock_irqrestore(&cctx->lock, flags);
1627
1628	return 0;
1629}
1630
1631static int fastrpc_dmabuf_alloc(struct fastrpc_user *fl, char __user *argp)
1632{
1633	struct fastrpc_alloc_dma_buf bp;
1634	DEFINE_DMA_BUF_EXPORT_INFO(exp_info);
1635	struct fastrpc_buf *buf = NULL;
1636	int err;
1637
1638	if (copy_from_user(&bp, argp, sizeof(bp)))
1639		return -EFAULT;
1640
1641	err = fastrpc_buf_alloc(fl, fl->sctx->dev, bp.size, &buf);
1642	if (err)
1643		return err;
1644	exp_info.ops = &fastrpc_dma_buf_ops;
1645	exp_info.size = bp.size;
1646	exp_info.flags = O_RDWR;
1647	exp_info.priv = buf;
1648	buf->dmabuf = dma_buf_export(&exp_info);
1649	if (IS_ERR(buf->dmabuf)) {
1650		err = PTR_ERR(buf->dmabuf);
1651		fastrpc_buf_free(buf);
1652		return err;
1653	}
1654
1655	bp.fd = dma_buf_fd(buf->dmabuf, O_ACCMODE);
1656	if (bp.fd < 0) {
1657		dma_buf_put(buf->dmabuf);
1658		return -EINVAL;
1659	}
1660
1661	if (copy_to_user(argp, &bp, sizeof(bp))) {
1662		/*
1663		 * The usercopy failed, but we can't do much about it, as
1664		 * dma_buf_fd() already called fd_install() and made the
1665		 * file descriptor accessible for the current process. It
1666		 * might already be closed and dmabuf no longer valid when
1667		 * we reach this point. Therefore "leak" the fd and rely on
1668		 * the process exit path to do any required cleanup.
1669		 */
1670		return -EFAULT;
1671	}
1672
1673	return 0;
1674}
1675
1676static int fastrpc_init_attach(struct fastrpc_user *fl, int pd)
1677{
1678	struct fastrpc_invoke_args args[1];
1679	int client_id = fl->client_id;
1680	u32 sc;
1681
1682	args[0].ptr = (u64)(uintptr_t) &client_id;
1683	args[0].length = sizeof(client_id);
1684	args[0].fd = -1;
1685	sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_ATTACH, 1, 0);
1686	fl->pd = pd;
1687
1688	return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE,
1689				       sc, &args[0]);
1690}
1691
1692static int fastrpc_invoke(struct fastrpc_user *fl, char __user *argp)
1693{
1694	struct fastrpc_invoke_args *args = NULL;
1695	struct fastrpc_invoke inv;
1696	u32 nscalars;
1697	int err;
1698
1699	if (copy_from_user(&inv, argp, sizeof(inv)))
1700		return -EFAULT;
1701
1702	/* nscalars is truncated here to max supported value */
1703	nscalars = REMOTE_SCALARS_LENGTH(inv.sc);
1704	if (nscalars) {
1705		args = kcalloc(nscalars, sizeof(*args), GFP_KERNEL);
1706		if (!args)
1707			return -ENOMEM;
1708
1709		if (copy_from_user(args, (void __user *)(uintptr_t)inv.args,
1710				   nscalars * sizeof(*args))) {
1711			kfree(args);
1712			return -EFAULT;
1713		}
1714	}
1715
1716	err = fastrpc_internal_invoke(fl, false, inv.handle, inv.sc, args);
1717	kfree(args);
1718
1719	return err;
1720}
1721
1722static int fastrpc_get_info_from_dsp(struct fastrpc_user *fl, uint32_t *dsp_attr_buf,
1723				     uint32_t dsp_attr_buf_len)
1724{
1725	struct fastrpc_invoke_args args[2] = { 0 };
1726
1727	/*
1728	 * Capability filled in userspace. This carries the information
1729	 * about the remoteproc support which is fetched from the remoteproc
1730	 * sysfs node by userspace.
1731	 */
1732	dsp_attr_buf[0] = 0;
1733	dsp_attr_buf_len -= 1;
1734
1735	args[0].ptr = (u64)(uintptr_t)&dsp_attr_buf_len;
1736	args[0].length = sizeof(dsp_attr_buf_len);
1737	args[0].fd = -1;
1738	args[1].ptr = (u64)(uintptr_t)&dsp_attr_buf[1];
1739	args[1].length = dsp_attr_buf_len * sizeof(u32);
1740	args[1].fd = -1;
1741
1742	return fastrpc_internal_invoke(fl, true, FASTRPC_DSP_UTILITIES_HANDLE,
1743				       FASTRPC_SCALARS(0, 1, 1), args);
1744}
1745
1746static int fastrpc_get_info_from_kernel(struct fastrpc_ioctl_capability *cap,
1747					struct fastrpc_user *fl)
1748{
1749	struct fastrpc_channel_ctx *cctx = fl->cctx;
1750	uint32_t attribute_id = cap->attribute_id;
1751	uint32_t *dsp_attributes;
1752	unsigned long flags;
1753	int err;
1754
1755	spin_lock_irqsave(&cctx->lock, flags);
1756	/* check if we already have queried dsp for attributes */
1757	if (cctx->valid_attributes) {
1758		spin_unlock_irqrestore(&cctx->lock, flags);
1759		goto done;
1760	}
1761	spin_unlock_irqrestore(&cctx->lock, flags);
1762
1763	dsp_attributes = kzalloc(FASTRPC_MAX_DSP_ATTRIBUTES_LEN, GFP_KERNEL);
1764	if (!dsp_attributes)
1765		return -ENOMEM;
1766
1767	err = fastrpc_get_info_from_dsp(fl, dsp_attributes, FASTRPC_MAX_DSP_ATTRIBUTES);
1768	if (err == DSP_UNSUPPORTED_API) {
1769		dev_info(&cctx->rpdev->dev,
1770			 "Warning: DSP capabilities not supported\n");
1771		kfree(dsp_attributes);
1772		return -EOPNOTSUPP;
1773	} else if (err) {
1774		dev_err(&cctx->rpdev->dev, "Error: dsp information is incorrect err: %d\n", err);
1775		kfree(dsp_attributes);
1776		return err;
1777	}
1778
1779	spin_lock_irqsave(&cctx->lock, flags);
1780	memcpy(cctx->dsp_attributes, dsp_attributes, FASTRPC_MAX_DSP_ATTRIBUTES_LEN);
1781	cctx->valid_attributes = true;
1782	spin_unlock_irqrestore(&cctx->lock, flags);
1783	kfree(dsp_attributes);
1784done:
1785	cap->capability = cctx->dsp_attributes[attribute_id];
1786	return 0;
1787}
1788
1789static int fastrpc_get_dsp_info(struct fastrpc_user *fl, char __user *argp)
1790{
1791	struct fastrpc_ioctl_capability cap = {0};
1792	int err = 0;
1793
1794	if (copy_from_user(&cap, argp, sizeof(cap)))
1795		return  -EFAULT;
1796
1797	cap.capability = 0;
1798
1799	if (cap.attribute_id >= FASTRPC_MAX_DSP_ATTRIBUTES) {
1800		dev_err(&fl->cctx->rpdev->dev, "Error: invalid attribute: %d, err: %d\n",
1801			cap.attribute_id, err);
1802		return -EOVERFLOW;
1803	}
1804
1805	err = fastrpc_get_info_from_kernel(&cap, fl);
1806	if (err)
1807		return err;
1808
1809	if (copy_to_user(argp, &cap, sizeof(cap)))
1810		return -EFAULT;
1811
1812	return 0;
1813}
1814
1815static int fastrpc_req_munmap_impl(struct fastrpc_user *fl, struct fastrpc_buf *buf)
1816{
1817	struct fastrpc_invoke_args args[1] = { [0] = { 0 } };
1818	struct fastrpc_munmap_req_msg req_msg;
1819	struct device *dev = fl->sctx->dev;
1820	int err;
1821	u32 sc;
1822
1823	req_msg.client_id = fl->client_id;
1824	req_msg.size = buf->size;
1825	req_msg.vaddr = buf->raddr;
1826
1827	args[0].ptr = (u64) (uintptr_t) &req_msg;
1828	args[0].length = sizeof(req_msg);
1829
1830	sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MUNMAP, 1, 0);
1831	err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc,
1832				      &args[0]);
1833	if (!err) {
1834		dev_dbg(dev, "unmmap\tpt 0x%09lx OK\n", buf->raddr);
1835		spin_lock(&fl->lock);
1836		list_del(&buf->node);
1837		spin_unlock(&fl->lock);
1838		fastrpc_buf_free(buf);
1839	} else {
1840		dev_err(dev, "unmmap\tpt 0x%09lx ERROR\n", buf->raddr);
1841	}
1842
1843	return err;
1844}
1845
1846static int fastrpc_req_munmap(struct fastrpc_user *fl, char __user *argp)
1847{
1848	struct fastrpc_buf *buf = NULL, *iter, *b;
1849	struct fastrpc_req_munmap req;
1850	struct device *dev = fl->sctx->dev;
1851
1852	if (copy_from_user(&req, argp, sizeof(req)))
1853		return -EFAULT;
1854
1855	spin_lock(&fl->lock);
1856	list_for_each_entry_safe(iter, b, &fl->mmaps, node) {
1857		if ((iter->raddr == req.vaddrout) && (iter->size == req.size)) {
1858			buf = iter;
1859			break;
1860		}
1861	}
1862	spin_unlock(&fl->lock);
1863
1864	if (!buf) {
1865		dev_err(dev, "mmap\t\tpt 0x%09llx [len 0x%08llx] not in list\n",
1866			req.vaddrout, req.size);
1867		return -EINVAL;
1868	}
1869
1870	return fastrpc_req_munmap_impl(fl, buf);
1871}
1872
1873static int fastrpc_req_mmap(struct fastrpc_user *fl, char __user *argp)
1874{
1875	struct fastrpc_invoke_args args[3] = { [0 ... 2] = { 0 } };
1876	struct fastrpc_buf *buf = NULL;
1877	struct fastrpc_mmap_req_msg req_msg;
1878	struct fastrpc_mmap_rsp_msg rsp_msg;
1879	struct fastrpc_phy_page pages;
1880	struct fastrpc_req_mmap req;
1881	struct device *dev = fl->sctx->dev;
1882	int err;
1883	u32 sc;
1884
1885	if (copy_from_user(&req, argp, sizeof(req)))
1886		return -EFAULT;
1887
1888	if (req.flags != ADSP_MMAP_ADD_PAGES && req.flags != ADSP_MMAP_REMOTE_HEAP_ADDR) {
1889		dev_err(dev, "flag not supported 0x%x\n", req.flags);
1890
1891		return -EINVAL;
1892	}
1893
1894	if (req.vaddrin) {
1895		dev_err(dev, "adding user allocated pages is not supported\n");
1896		return -EINVAL;
1897	}
1898
1899	if (req.flags == ADSP_MMAP_REMOTE_HEAP_ADDR)
1900		err = fastrpc_remote_heap_alloc(fl, dev, req.size, &buf);
1901	else
1902		err = fastrpc_buf_alloc(fl, dev, req.size, &buf);
1903
1904	if (err) {
1905		dev_err(dev, "failed to allocate buffer\n");
1906		return err;
1907	}
1908
1909	req_msg.client_id = fl->client_id;
1910	req_msg.flags = req.flags;
1911	req_msg.vaddr = req.vaddrin;
1912	req_msg.num = sizeof(pages);
1913
1914	args[0].ptr = (u64) (uintptr_t) &req_msg;
1915	args[0].length = sizeof(req_msg);
1916
1917	pages.addr = buf->phys;
1918	pages.size = buf->size;
1919
1920	args[1].ptr = (u64) (uintptr_t) &pages;
1921	args[1].length = sizeof(pages);
1922
1923	args[2].ptr = (u64) (uintptr_t) &rsp_msg;
1924	args[2].length = sizeof(rsp_msg);
1925
1926	sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MMAP, 2, 1);
1927	err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc,
1928				      &args[0]);
1929	if (err) {
1930		dev_err(dev, "mmap error (len 0x%08llx)\n", buf->size);
1931		fastrpc_buf_free(buf);
1932		return err;
1933	}
1934
1935	/* update the buffer to be able to deallocate the memory on the DSP */
1936	buf->raddr = (uintptr_t) rsp_msg.vaddr;
1937
1938	/* let the client know the address to use */
1939	req.vaddrout = rsp_msg.vaddr;
1940
1941	/* Add memory to static PD pool, protection thru hypervisor */
1942	if (req.flags == ADSP_MMAP_REMOTE_HEAP_ADDR && fl->cctx->vmcount) {
1943		u64 src_perms = BIT(QCOM_SCM_VMID_HLOS);
1944
1945		err = qcom_scm_assign_mem(buf->phys, (u64)buf->size,
1946			&src_perms, fl->cctx->vmperms, fl->cctx->vmcount);
1947		if (err) {
1948			dev_err(fl->sctx->dev, "Failed to assign memory phys 0x%llx size 0x%llx err %d",
1949					buf->phys, buf->size, err);
1950			goto err_assign;
1951		}
1952	}
1953
1954	spin_lock(&fl->lock);
1955	list_add_tail(&buf->node, &fl->mmaps);
1956	spin_unlock(&fl->lock);
1957
1958	if (copy_to_user((void __user *)argp, &req, sizeof(req))) {
1959		err = -EFAULT;
1960		goto err_assign;
1961	}
1962
1963	dev_dbg(dev, "mmap\t\tpt 0x%09lx OK [len 0x%08llx]\n",
1964		buf->raddr, buf->size);
1965
1966	return 0;
1967
1968err_assign:
1969	fastrpc_req_munmap_impl(fl, buf);
1970
1971	return err;
1972}
1973
1974static int fastrpc_req_mem_unmap_impl(struct fastrpc_user *fl, struct fastrpc_mem_unmap *req)
1975{
1976	struct fastrpc_invoke_args args[1] = { [0] = { 0 } };
1977	struct fastrpc_map *map = NULL, *iter, *m;
1978	struct fastrpc_mem_unmap_req_msg req_msg = { 0 };
1979	int err = 0;
1980	u32 sc;
1981	struct device *dev = fl->sctx->dev;
1982
1983	spin_lock(&fl->lock);
1984	list_for_each_entry_safe(iter, m, &fl->maps, node) {
1985		if ((req->fd < 0 || iter->fd == req->fd) && (iter->raddr == req->vaddr)) {
1986			map = iter;
1987			break;
1988		}
1989	}
1990
1991	spin_unlock(&fl->lock);
1992
1993	if (!map) {
1994		dev_err(dev, "map not in list\n");
1995		return -EINVAL;
1996	}
1997
1998	req_msg.client_id = fl->client_id;
1999	req_msg.len = map->len;
2000	req_msg.vaddrin = map->raddr;
2001	req_msg.fd = map->fd;
2002
2003	args[0].ptr = (u64) (uintptr_t) &req_msg;
2004	args[0].length = sizeof(req_msg);
2005
2006	sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MEM_UNMAP, 1, 0);
2007	err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc,
2008				      &args[0]);
2009	if (err) {
2010		dev_err(dev, "unmmap\tpt fd = %d, 0x%09llx error\n",  map->fd, map->raddr);
2011		return err;
2012	}
2013	fastrpc_map_put(map);
2014
2015	return 0;
2016}
2017
2018static int fastrpc_req_mem_unmap(struct fastrpc_user *fl, char __user *argp)
2019{
2020	struct fastrpc_mem_unmap req;
2021
2022	if (copy_from_user(&req, argp, sizeof(req)))
2023		return -EFAULT;
2024
2025	return fastrpc_req_mem_unmap_impl(fl, &req);
2026}
2027
2028static int fastrpc_req_mem_map(struct fastrpc_user *fl, char __user *argp)
2029{
2030	struct fastrpc_invoke_args args[4] = { [0 ... 3] = { 0 } };
2031	struct fastrpc_mem_map_req_msg req_msg = { 0 };
2032	struct fastrpc_mmap_rsp_msg rsp_msg = { 0 };
2033	struct fastrpc_mem_unmap req_unmap = { 0 };
2034	struct fastrpc_phy_page pages = { 0 };
2035	struct fastrpc_mem_map req;
2036	struct device *dev = fl->sctx->dev;
2037	struct fastrpc_map *map = NULL;
2038	int err;
2039	u32 sc;
2040
2041	if (copy_from_user(&req, argp, sizeof(req)))
2042		return -EFAULT;
2043
2044	/* create SMMU mapping */
2045	err = fastrpc_map_create(fl, req.fd, req.length, 0, &map);
2046	if (err) {
2047		dev_err(dev, "failed to map buffer, fd = %d\n", req.fd);
2048		return err;
2049	}
2050
2051	req_msg.client_id = fl->client_id;
2052	req_msg.fd = req.fd;
2053	req_msg.offset = req.offset;
2054	req_msg.vaddrin = req.vaddrin;
2055	map->va = (void *) (uintptr_t) req.vaddrin;
2056	req_msg.flags = req.flags;
2057	req_msg.num = sizeof(pages);
2058	req_msg.data_len = 0;
2059
2060	args[0].ptr = (u64) (uintptr_t) &req_msg;
2061	args[0].length = sizeof(req_msg);
2062
2063	pages.addr = map->phys;
2064	pages.size = map->len;
2065
2066	args[1].ptr = (u64) (uintptr_t) &pages;
2067	args[1].length = sizeof(pages);
2068
2069	args[2].ptr = (u64) (uintptr_t) &pages;
2070	args[2].length = 0;
2071
2072	args[3].ptr = (u64) (uintptr_t) &rsp_msg;
2073	args[3].length = sizeof(rsp_msg);
2074
2075	sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MEM_MAP, 3, 1);
2076	err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, &args[0]);
2077	if (err) {
2078		dev_err(dev, "mem mmap error, fd %d, vaddr %llx, size %lld\n",
2079			req.fd, req.vaddrin, map->len);
2080		goto err_invoke;
2081	}
2082
2083	/* update the buffer to be able to deallocate the memory on the DSP */
2084	map->raddr = rsp_msg.vaddr;
2085
2086	/* let the client know the address to use */
2087	req.vaddrout = rsp_msg.vaddr;
2088
2089	if (copy_to_user((void __user *)argp, &req, sizeof(req))) {
2090		/* unmap the memory and release the buffer */
2091		req_unmap.vaddr = (uintptr_t) rsp_msg.vaddr;
2092		req_unmap.length = map->len;
2093		fastrpc_req_mem_unmap_impl(fl, &req_unmap);
2094		return -EFAULT;
2095	}
2096
2097	return 0;
2098
2099err_invoke:
2100	fastrpc_map_put(map);
2101
2102	return err;
2103}
2104
2105static long fastrpc_device_ioctl(struct file *file, unsigned int cmd,
2106				 unsigned long arg)
2107{
2108	struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data;
2109	char __user *argp = (char __user *)arg;
2110	int err;
2111
2112	switch (cmd) {
2113	case FASTRPC_IOCTL_INVOKE:
2114		err = fastrpc_invoke(fl, argp);
2115		break;
2116	case FASTRPC_IOCTL_INIT_ATTACH:
2117		err = fastrpc_init_attach(fl, ROOT_PD);
2118		break;
2119	case FASTRPC_IOCTL_INIT_ATTACH_SNS:
2120		err = fastrpc_init_attach(fl, SENSORS_PD);
2121		break;
2122	case FASTRPC_IOCTL_INIT_CREATE_STATIC:
2123		err = fastrpc_init_create_static_process(fl, argp);
2124		break;
2125	case FASTRPC_IOCTL_INIT_CREATE:
2126		err = fastrpc_init_create_process(fl, argp);
2127		break;
2128	case FASTRPC_IOCTL_ALLOC_DMA_BUFF:
2129		err = fastrpc_dmabuf_alloc(fl, argp);
2130		break;
2131	case FASTRPC_IOCTL_MMAP:
2132		err = fastrpc_req_mmap(fl, argp);
2133		break;
2134	case FASTRPC_IOCTL_MUNMAP:
2135		err = fastrpc_req_munmap(fl, argp);
2136		break;
2137	case FASTRPC_IOCTL_MEM_MAP:
2138		err = fastrpc_req_mem_map(fl, argp);
2139		break;
2140	case FASTRPC_IOCTL_MEM_UNMAP:
2141		err = fastrpc_req_mem_unmap(fl, argp);
2142		break;
2143	case FASTRPC_IOCTL_GET_DSP_INFO:
2144		err = fastrpc_get_dsp_info(fl, argp);
2145		break;
2146	default:
2147		err = -ENOTTY;
2148		break;
2149	}
2150
2151	return err;
2152}
2153
2154static const struct file_operations fastrpc_fops = {
2155	.open = fastrpc_device_open,
2156	.release = fastrpc_device_release,
2157	.unlocked_ioctl = fastrpc_device_ioctl,
2158	.compat_ioctl = fastrpc_device_ioctl,
2159};
2160
2161static int fastrpc_cb_probe(struct platform_device *pdev)
2162{
2163	struct fastrpc_channel_ctx *cctx;
2164	struct fastrpc_session_ctx *sess;
2165	struct device *dev = &pdev->dev;
2166	int i, sessions = 0;
2167	unsigned long flags;
2168	int rc;
2169
2170	cctx = dev_get_drvdata(dev->parent);
2171	if (!cctx)
2172		return -EINVAL;
2173
2174	of_property_read_u32(dev->of_node, "qcom,nsessions", &sessions);
2175
2176	spin_lock_irqsave(&cctx->lock, flags);
2177	if (cctx->sesscount >= FASTRPC_MAX_SESSIONS) {
2178		dev_err(&pdev->dev, "too many sessions\n");
2179		spin_unlock_irqrestore(&cctx->lock, flags);
2180		return -ENOSPC;
2181	}
2182	sess = &cctx->session[cctx->sesscount++];
2183	sess->used = false;
2184	sess->valid = true;
2185	sess->dev = dev;
2186	dev_set_drvdata(dev, sess);
2187
2188	if (of_property_read_u32(dev->of_node, "reg", &sess->sid))
2189		dev_info(dev, "FastRPC Session ID not specified in DT\n");
2190
2191	if (sessions > 0) {
2192		struct fastrpc_session_ctx *dup_sess;
2193
2194		for (i = 1; i < sessions; i++) {
2195			if (cctx->sesscount >= FASTRPC_MAX_SESSIONS)
2196				break;
2197			dup_sess = &cctx->session[cctx->sesscount++];
2198			memcpy(dup_sess, sess, sizeof(*dup_sess));
2199		}
2200	}
2201	spin_unlock_irqrestore(&cctx->lock, flags);
2202	rc = dma_set_mask(dev, DMA_BIT_MASK(32));
2203	if (rc) {
2204		dev_err(dev, "32-bit DMA enable failed\n");
2205		return rc;
2206	}
2207
2208	return 0;
2209}
2210
2211static void fastrpc_cb_remove(struct platform_device *pdev)
2212{
2213	struct fastrpc_channel_ctx *cctx = dev_get_drvdata(pdev->dev.parent);
2214	struct fastrpc_session_ctx *sess = dev_get_drvdata(&pdev->dev);
2215	unsigned long flags;
2216	int i;
2217
2218	spin_lock_irqsave(&cctx->lock, flags);
2219	for (i = 0; i < FASTRPC_MAX_SESSIONS; i++) {
2220		if (cctx->session[i].sid == sess->sid) {
2221			cctx->session[i].valid = false;
2222			cctx->sesscount--;
2223		}
2224	}
2225	spin_unlock_irqrestore(&cctx->lock, flags);
2226}
2227
2228static const struct of_device_id fastrpc_match_table[] = {
2229	{ .compatible = "qcom,fastrpc-compute-cb", },
2230	{}
2231};
2232
2233static struct platform_driver fastrpc_cb_driver = {
2234	.probe = fastrpc_cb_probe,
2235	.remove = fastrpc_cb_remove,
2236	.driver = {
2237		.name = "qcom,fastrpc-cb",
2238		.of_match_table = fastrpc_match_table,
2239		.suppress_bind_attrs = true,
2240	},
2241};
2242
2243static int fastrpc_device_register(struct device *dev, struct fastrpc_channel_ctx *cctx,
2244				   bool is_secured, const char *domain)
2245{
2246	struct fastrpc_device *fdev;
2247	int err;
2248
2249	fdev = devm_kzalloc(dev, sizeof(*fdev), GFP_KERNEL);
2250	if (!fdev)
2251		return -ENOMEM;
2252
2253	fdev->secure = is_secured;
2254	fdev->cctx = cctx;
2255	fdev->miscdev.minor = MISC_DYNAMIC_MINOR;
2256	fdev->miscdev.fops = &fastrpc_fops;
2257	fdev->miscdev.name = devm_kasprintf(dev, GFP_KERNEL, "fastrpc-%s%s",
2258					    domain, is_secured ? "-secure" : "");
2259	if (!fdev->miscdev.name)
2260		return -ENOMEM;
2261
2262	err = misc_register(&fdev->miscdev);
2263	if (!err) {
2264		if (is_secured)
2265			cctx->secure_fdevice = fdev;
2266		else
2267			cctx->fdevice = fdev;
2268	}
2269
2270	return err;
2271}
2272
2273static int fastrpc_get_domain_id(const char *domain)
2274{
2275	if (!strncmp(domain, "adsp", 4))
2276		return ADSP_DOMAIN_ID;
2277	else if (!strncmp(domain, "cdsp", 4))
2278		return CDSP_DOMAIN_ID;
2279	else if (!strncmp(domain, "mdsp", 4))
2280		return MDSP_DOMAIN_ID;
2281	else if (!strncmp(domain, "sdsp", 4))
2282		return SDSP_DOMAIN_ID;
2283	else if (!strncmp(domain, "gdsp", 4))
2284		return GDSP_DOMAIN_ID;
2285
2286	return -EINVAL;
2287}
2288
2289static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev)
2290{
2291	struct device *rdev = &rpdev->dev;
2292	struct fastrpc_channel_ctx *data;
2293	int i, err, domain_id = -1, vmcount;
2294	const char *domain;
2295	bool secure_dsp;
2296	unsigned int vmids[FASTRPC_MAX_VMIDS];
2297
2298	err = of_property_read_string(rdev->of_node, "label", &domain);
2299	if (err) {
2300		dev_info(rdev, "FastRPC Domain not specified in DT\n");
2301		return err;
2302	}
2303
2304	domain_id = fastrpc_get_domain_id(domain);
2305
2306	if (domain_id < 0) {
2307		dev_info(rdev, "FastRPC Domain %s not supported\n", domain);
2308		return -EINVAL;
2309	}
2310
2311	if (of_reserved_mem_device_init_by_idx(rdev, rdev->of_node, 0))
2312		dev_info(rdev, "no reserved DMA memory for FASTRPC\n");
2313
2314	vmcount = of_property_read_variable_u32_array(rdev->of_node,
2315				"qcom,vmids", &vmids[0], 0, FASTRPC_MAX_VMIDS);
2316	if (vmcount < 0)
2317		vmcount = 0;
2318	else if (!qcom_scm_is_available())
2319		return -EPROBE_DEFER;
2320
2321	data = kzalloc(sizeof(*data), GFP_KERNEL);
2322	if (!data)
2323		return -ENOMEM;
2324
2325	if (vmcount) {
2326		data->vmcount = vmcount;
2327		for (i = 0; i < data->vmcount; i++) {
2328			data->vmperms[i].vmid = vmids[i];
2329			data->vmperms[i].perm = QCOM_SCM_PERM_RWX;
2330		}
2331	}
2332
2333	if (domain_id == SDSP_DOMAIN_ID) {
2334		struct resource res;
2335		u64 src_perms;
2336
2337		err = of_reserved_mem_region_to_resource(rdev->of_node, 0, &res);
2338		if (!err) {
2339			src_perms = BIT(QCOM_SCM_VMID_HLOS);
2340
2341			err = qcom_scm_assign_mem(res.start, resource_size(&res), &src_perms,
2342				    data->vmperms, data->vmcount);
2343			if (err)
2344				goto err_free_data;
2345		}
2346
2347	}
2348
2349	secure_dsp = !(of_property_read_bool(rdev->of_node, "qcom,non-secure-domain"));
2350	data->secure = secure_dsp;
2351
2352	switch (domain_id) {
2353	case ADSP_DOMAIN_ID:
2354	case MDSP_DOMAIN_ID:
2355	case SDSP_DOMAIN_ID:
2356		/* Unsigned PD offloading is only supported on CDSP and GDSP */
2357		data->unsigned_support = false;
2358		err = fastrpc_device_register(rdev, data, secure_dsp, domain);
2359		if (err)
2360			goto err_free_data;
2361		break;
2362	case CDSP_DOMAIN_ID:
2363	case GDSP_DOMAIN_ID:
2364		data->unsigned_support = true;
2365		/* Create both device nodes so that we can allow both Signed and Unsigned PD */
2366		err = fastrpc_device_register(rdev, data, true, domain);
2367		if (err)
2368			goto err_free_data;
2369
2370		err = fastrpc_device_register(rdev, data, false, domain);
2371		if (err)
2372			goto err_deregister_fdev;
2373		break;
2374	default:
2375		err = -EINVAL;
2376		goto err_free_data;
2377	}
2378
2379	kref_init(&data->refcount);
2380
2381	dev_set_drvdata(&rpdev->dev, data);
2382	rdev->dma_mask = &data->dma_mask;
2383	dma_set_mask_and_coherent(rdev, DMA_BIT_MASK(32));
2384	INIT_LIST_HEAD(&data->users);
2385	INIT_LIST_HEAD(&data->invoke_interrupted_mmaps);
2386	spin_lock_init(&data->lock);
2387	idr_init(&data->ctx_idr);
2388	data->domain_id = domain_id;
2389	data->rpdev = rpdev;
2390
2391	err = of_platform_populate(rdev->of_node, NULL, NULL, rdev);
2392	if (err)
2393		goto err_deregister_fdev;
2394
2395	return 0;
2396
2397err_deregister_fdev:
2398	if (data->fdevice)
2399		misc_deregister(&data->fdevice->miscdev);
2400	if (data->secure_fdevice)
2401		misc_deregister(&data->secure_fdevice->miscdev);
2402
2403err_free_data:
2404	kfree(data);
2405	return err;
2406}
2407
2408static void fastrpc_notify_users(struct fastrpc_user *user)
2409{
2410	struct fastrpc_invoke_ctx *ctx;
2411
2412	spin_lock(&user->lock);
2413	list_for_each_entry(ctx, &user->pending, node) {
2414		ctx->retval = -EPIPE;
2415		complete(&ctx->work);
2416	}
2417	spin_unlock(&user->lock);
2418}
2419
2420static void fastrpc_rpmsg_remove(struct rpmsg_device *rpdev)
2421{
2422	struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev);
2423	struct fastrpc_buf *buf, *b;
2424	struct fastrpc_user *user;
2425	unsigned long flags;
2426
2427	/* No invocations past this point */
2428	spin_lock_irqsave(&cctx->lock, flags);
2429	cctx->rpdev = NULL;
2430	list_for_each_entry(user, &cctx->users, user)
2431		fastrpc_notify_users(user);
2432	spin_unlock_irqrestore(&cctx->lock, flags);
2433
2434	if (cctx->fdevice)
2435		misc_deregister(&cctx->fdevice->miscdev);
2436
2437	if (cctx->secure_fdevice)
2438		misc_deregister(&cctx->secure_fdevice->miscdev);
2439
2440	list_for_each_entry_safe(buf, b, &cctx->invoke_interrupted_mmaps, node)
2441		list_del(&buf->node);
2442
2443	if (cctx->remote_heap)
2444		fastrpc_buf_free(cctx->remote_heap);
2445
2446	of_platform_depopulate(&rpdev->dev);
2447
2448	fastrpc_channel_ctx_put(cctx);
2449}
2450
2451static int fastrpc_rpmsg_callback(struct rpmsg_device *rpdev, void *data,
2452				  int len, void *priv, u32 addr)
2453{
2454	struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev);
2455	struct fastrpc_invoke_rsp *rsp = data;
2456	struct fastrpc_invoke_ctx *ctx;
2457	unsigned long flags;
2458	unsigned long ctxid;
2459
2460	if (len < sizeof(*rsp))
2461		return -EINVAL;
2462
2463	ctxid = ((rsp->ctx & FASTRPC_CTXID_MASK) >> 4);
2464
2465	spin_lock_irqsave(&cctx->lock, flags);
2466	ctx = idr_find(&cctx->ctx_idr, ctxid);
2467	spin_unlock_irqrestore(&cctx->lock, flags);
2468
2469	if (!ctx) {
2470		dev_err(&rpdev->dev, "No context ID matches response\n");
2471		return -ENOENT;
2472	}
2473
2474	ctx->retval = rsp->retval;
2475	complete(&ctx->work);
2476
2477	/*
2478	 * The DMA buffer associated with the context cannot be freed in
2479	 * interrupt context so schedule it through a worker thread to
2480	 * avoid a kernel BUG.
2481	 */
2482	schedule_work(&ctx->put_work);
2483
2484	return 0;
2485}
2486
2487static const struct of_device_id fastrpc_rpmsg_of_match[] = {
2488	{ .compatible = "qcom,fastrpc" },
2489	{ },
2490};
2491MODULE_DEVICE_TABLE(of, fastrpc_rpmsg_of_match);
2492
2493static struct rpmsg_driver fastrpc_driver = {
2494	.probe = fastrpc_rpmsg_probe,
2495	.remove = fastrpc_rpmsg_remove,
2496	.callback = fastrpc_rpmsg_callback,
2497	.drv = {
2498		.name = "qcom,fastrpc",
2499		.of_match_table = fastrpc_rpmsg_of_match,
2500	},
2501};
2502
2503static int fastrpc_init(void)
2504{
2505	int ret;
2506
2507	ret = platform_driver_register(&fastrpc_cb_driver);
2508	if (ret < 0) {
2509		pr_err("fastrpc: failed to register cb driver\n");
2510		return ret;
2511	}
2512
2513	ret = register_rpmsg_driver(&fastrpc_driver);
2514	if (ret < 0) {
2515		pr_err("fastrpc: failed to register rpmsg driver\n");
2516		platform_driver_unregister(&fastrpc_cb_driver);
2517		return ret;
2518	}
2519
2520	return 0;
2521}
2522module_init(fastrpc_init);
2523
2524static void fastrpc_exit(void)
2525{
2526	platform_driver_unregister(&fastrpc_cb_driver);
2527	unregister_rpmsg_driver(&fastrpc_driver);
2528}
2529module_exit(fastrpc_exit);
2530
2531MODULE_DESCRIPTION("Qualcomm FastRPC");
2532MODULE_LICENSE("GPL v2");
2533MODULE_IMPORT_NS("DMA_BUF");