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