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Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux
[mirror_ubuntu-jammy-kernel.git] / drivers / misc / 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/idr.h>
10 #include <linux/list.h>
11 #include <linux/miscdevice.h>
12 #include <linux/module.h>
13 #include <linux/of_address.h>
14 #include <linux/of.h>
15 #include <linux/sort.h>
16 #include <linux/of_platform.h>
17 #include <linux/rpmsg.h>
18 #include <linux/scatterlist.h>
19 #include <linux/slab.h>
20 #include <uapi/misc/fastrpc.h>
21
22 #define ADSP_DOMAIN_ID (0)
23 #define MDSP_DOMAIN_ID (1)
24 #define SDSP_DOMAIN_ID (2)
25 #define CDSP_DOMAIN_ID (3)
26 #define FASTRPC_DEV_MAX 4 /* adsp, mdsp, slpi, cdsp*/
27 #define FASTRPC_MAX_SESSIONS 9 /*8 compute, 1 cpz*/
28 #define FASTRPC_ALIGN 128
29 #define FASTRPC_MAX_FDLIST 16
30 #define FASTRPC_MAX_CRCLIST 64
31 #define FASTRPC_PHYS(p) ((p) & 0xffffffff)
32 #define FASTRPC_CTX_MAX (256)
33 #define FASTRPC_INIT_HANDLE 1
34 #define FASTRPC_CTXID_MASK (0xFF0)
35 #define INIT_FILELEN_MAX (2 * 1024 * 1024)
36 #define FASTRPC_DEVICE_NAME "fastrpc"
37 #define ADSP_MMAP_ADD_PAGES 0x1000
38
39 /* Retrives number of input buffers from the scalars parameter */
40 #define REMOTE_SCALARS_INBUFS(sc) (((sc) >> 16) & 0x0ff)
41
42 /* Retrives number of output buffers from the scalars parameter */
43 #define REMOTE_SCALARS_OUTBUFS(sc) (((sc) >> 8) & 0x0ff)
44
45 /* Retrives number of input handles from the scalars parameter */
46 #define REMOTE_SCALARS_INHANDLES(sc) (((sc) >> 4) & 0x0f)
47
48 /* Retrives number of output handles from the scalars parameter */
49 #define REMOTE_SCALARS_OUTHANDLES(sc) ((sc) & 0x0f)
50
51 #define REMOTE_SCALARS_LENGTH(sc) (REMOTE_SCALARS_INBUFS(sc) + \
52 REMOTE_SCALARS_OUTBUFS(sc) + \
53 REMOTE_SCALARS_INHANDLES(sc)+ \
54 REMOTE_SCALARS_OUTHANDLES(sc))
55 #define FASTRPC_BUILD_SCALARS(attr, method, in, out, oin, oout) \
56 (((attr & 0x07) << 29) | \
57 ((method & 0x1f) << 24) | \
58 ((in & 0xff) << 16) | \
59 ((out & 0xff) << 8) | \
60 ((oin & 0x0f) << 4) | \
61 (oout & 0x0f))
62
63 #define FASTRPC_SCALARS(method, in, out) \
64 FASTRPC_BUILD_SCALARS(0, method, in, out, 0, 0)
65
66 #define FASTRPC_CREATE_PROCESS_NARGS 6
67 /* Remote Method id table */
68 #define FASTRPC_RMID_INIT_ATTACH 0
69 #define FASTRPC_RMID_INIT_RELEASE 1
70 #define FASTRPC_RMID_INIT_MMAP 4
71 #define FASTRPC_RMID_INIT_MUNMAP 5
72 #define FASTRPC_RMID_INIT_CREATE 6
73 #define FASTRPC_RMID_INIT_CREATE_ATTR 7
74 #define FASTRPC_RMID_INIT_CREATE_STATIC 8
75
76 /* Protection Domain(PD) ids */
77 #define AUDIO_PD (0) /* also GUEST_OS PD? */
78 #define USER_PD (1)
79 #define SENSORS_PD (2)
80
81 #define miscdev_to_cctx(d) container_of(d, struct fastrpc_channel_ctx, miscdev)
82
83 static const char *domains[FASTRPC_DEV_MAX] = { "adsp", "mdsp",
84 "sdsp", "cdsp"};
85 struct fastrpc_phy_page {
86 u64 addr; /* physical address */
87 u64 size; /* size of contiguous region */
88 };
89
90 struct fastrpc_invoke_buf {
91 u32 num; /* number of contiguous regions */
92 u32 pgidx; /* index to start of contiguous region */
93 };
94
95 struct fastrpc_remote_arg {
96 u64 pv;
97 u64 len;
98 };
99
100 struct fastrpc_mmap_rsp_msg {
101 u64 vaddr;
102 };
103
104 struct fastrpc_mmap_req_msg {
105 s32 pgid;
106 u32 flags;
107 u64 vaddr;
108 s32 num;
109 };
110
111 struct fastrpc_munmap_req_msg {
112 s32 pgid;
113 u64 vaddr;
114 u64 size;
115 };
116
117 struct fastrpc_msg {
118 int pid; /* process group id */
119 int tid; /* thread id */
120 u64 ctx; /* invoke caller context */
121 u32 handle; /* handle to invoke */
122 u32 sc; /* scalars structure describing the data */
123 u64 addr; /* physical address */
124 u64 size; /* size of contiguous region */
125 };
126
127 struct fastrpc_invoke_rsp {
128 u64 ctx; /* invoke caller context */
129 int retval; /* invoke return value */
130 };
131
132 struct fastrpc_buf_overlap {
133 u64 start;
134 u64 end;
135 int raix;
136 u64 mstart;
137 u64 mend;
138 u64 offset;
139 };
140
141 struct fastrpc_buf {
142 struct fastrpc_user *fl;
143 struct dma_buf *dmabuf;
144 struct device *dev;
145 void *virt;
146 u64 phys;
147 u64 size;
148 /* Lock for dma buf attachments */
149 struct mutex lock;
150 struct list_head attachments;
151 /* mmap support */
152 struct list_head node; /* list of user requested mmaps */
153 uintptr_t raddr;
154 };
155
156 struct fastrpc_dma_buf_attachment {
157 struct device *dev;
158 struct sg_table sgt;
159 struct list_head node;
160 };
161
162 struct fastrpc_map {
163 struct list_head node;
164 struct fastrpc_user *fl;
165 int fd;
166 struct dma_buf *buf;
167 struct sg_table *table;
168 struct dma_buf_attachment *attach;
169 u64 phys;
170 u64 size;
171 void *va;
172 u64 len;
173 struct kref refcount;
174 };
175
176 struct fastrpc_invoke_ctx {
177 int nscalars;
178 int nbufs;
179 int retval;
180 int pid;
181 int tgid;
182 u32 sc;
183 u32 *crc;
184 u64 ctxid;
185 u64 msg_sz;
186 struct kref refcount;
187 struct list_head node; /* list of ctxs */
188 struct completion work;
189 struct work_struct put_work;
190 struct fastrpc_msg msg;
191 struct fastrpc_user *fl;
192 struct fastrpc_remote_arg *rpra;
193 struct fastrpc_map **maps;
194 struct fastrpc_buf *buf;
195 struct fastrpc_invoke_args *args;
196 struct fastrpc_buf_overlap *olaps;
197 struct fastrpc_channel_ctx *cctx;
198 };
199
200 struct fastrpc_session_ctx {
201 struct device *dev;
202 int sid;
203 bool used;
204 bool valid;
205 };
206
207 struct fastrpc_channel_ctx {
208 int domain_id;
209 int sesscount;
210 struct rpmsg_device *rpdev;
211 struct fastrpc_session_ctx session[FASTRPC_MAX_SESSIONS];
212 spinlock_t lock;
213 struct idr ctx_idr;
214 struct list_head users;
215 struct miscdevice miscdev;
216 struct kref refcount;
217 };
218
219 struct fastrpc_user {
220 struct list_head user;
221 struct list_head maps;
222 struct list_head pending;
223 struct list_head mmaps;
224
225 struct fastrpc_channel_ctx *cctx;
226 struct fastrpc_session_ctx *sctx;
227 struct fastrpc_buf *init_mem;
228
229 int tgid;
230 int pd;
231 /* Lock for lists */
232 spinlock_t lock;
233 /* lock for allocations */
234 struct mutex mutex;
235 };
236
237 static void fastrpc_free_map(struct kref *ref)
238 {
239 struct fastrpc_map *map;
240
241 map = container_of(ref, struct fastrpc_map, refcount);
242
243 if (map->table) {
244 dma_buf_unmap_attachment(map->attach, map->table,
245 DMA_BIDIRECTIONAL);
246 dma_buf_detach(map->buf, map->attach);
247 dma_buf_put(map->buf);
248 }
249
250 kfree(map);
251 }
252
253 static void fastrpc_map_put(struct fastrpc_map *map)
254 {
255 if (map)
256 kref_put(&map->refcount, fastrpc_free_map);
257 }
258
259 static void fastrpc_map_get(struct fastrpc_map *map)
260 {
261 if (map)
262 kref_get(&map->refcount);
263 }
264
265 static int fastrpc_map_find(struct fastrpc_user *fl, int fd,
266 struct fastrpc_map **ppmap)
267 {
268 struct fastrpc_map *map = NULL;
269
270 mutex_lock(&fl->mutex);
271 list_for_each_entry(map, &fl->maps, node) {
272 if (map->fd == fd) {
273 fastrpc_map_get(map);
274 *ppmap = map;
275 mutex_unlock(&fl->mutex);
276 return 0;
277 }
278 }
279 mutex_unlock(&fl->mutex);
280
281 return -ENOENT;
282 }
283
284 static void fastrpc_buf_free(struct fastrpc_buf *buf)
285 {
286 dma_free_coherent(buf->dev, buf->size, buf->virt,
287 FASTRPC_PHYS(buf->phys));
288 kfree(buf);
289 }
290
291 static int fastrpc_buf_alloc(struct fastrpc_user *fl, struct device *dev,
292 u64 size, struct fastrpc_buf **obuf)
293 {
294 struct fastrpc_buf *buf;
295
296 buf = kzalloc(sizeof(*buf), GFP_KERNEL);
297 if (!buf)
298 return -ENOMEM;
299
300 INIT_LIST_HEAD(&buf->attachments);
301 INIT_LIST_HEAD(&buf->node);
302 mutex_init(&buf->lock);
303
304 buf->fl = fl;
305 buf->virt = NULL;
306 buf->phys = 0;
307 buf->size = size;
308 buf->dev = dev;
309 buf->raddr = 0;
310
311 buf->virt = dma_alloc_coherent(dev, buf->size, (dma_addr_t *)&buf->phys,
312 GFP_KERNEL);
313 if (!buf->virt) {
314 mutex_destroy(&buf->lock);
315 kfree(buf);
316 return -ENOMEM;
317 }
318
319 if (fl->sctx && fl->sctx->sid)
320 buf->phys += ((u64)fl->sctx->sid << 32);
321
322 *obuf = buf;
323
324 return 0;
325 }
326
327 static void fastrpc_channel_ctx_free(struct kref *ref)
328 {
329 struct fastrpc_channel_ctx *cctx;
330
331 cctx = container_of(ref, struct fastrpc_channel_ctx, refcount);
332
333 kfree(cctx);
334 }
335
336 static void fastrpc_channel_ctx_get(struct fastrpc_channel_ctx *cctx)
337 {
338 kref_get(&cctx->refcount);
339 }
340
341 static void fastrpc_channel_ctx_put(struct fastrpc_channel_ctx *cctx)
342 {
343 kref_put(&cctx->refcount, fastrpc_channel_ctx_free);
344 }
345
346 static void fastrpc_context_free(struct kref *ref)
347 {
348 struct fastrpc_invoke_ctx *ctx;
349 struct fastrpc_channel_ctx *cctx;
350 unsigned long flags;
351 int i;
352
353 ctx = container_of(ref, struct fastrpc_invoke_ctx, refcount);
354 cctx = ctx->cctx;
355
356 for (i = 0; i < ctx->nscalars; i++)
357 fastrpc_map_put(ctx->maps[i]);
358
359 if (ctx->buf)
360 fastrpc_buf_free(ctx->buf);
361
362 spin_lock_irqsave(&cctx->lock, flags);
363 idr_remove(&cctx->ctx_idr, ctx->ctxid >> 4);
364 spin_unlock_irqrestore(&cctx->lock, flags);
365
366 kfree(ctx->maps);
367 kfree(ctx->olaps);
368 kfree(ctx);
369
370 fastrpc_channel_ctx_put(cctx);
371 }
372
373 static void fastrpc_context_get(struct fastrpc_invoke_ctx *ctx)
374 {
375 kref_get(&ctx->refcount);
376 }
377
378 static void fastrpc_context_put(struct fastrpc_invoke_ctx *ctx)
379 {
380 kref_put(&ctx->refcount, fastrpc_context_free);
381 }
382
383 static void fastrpc_context_put_wq(struct work_struct *work)
384 {
385 struct fastrpc_invoke_ctx *ctx =
386 container_of(work, struct fastrpc_invoke_ctx, put_work);
387
388 fastrpc_context_put(ctx);
389 }
390
391 #define CMP(aa, bb) ((aa) == (bb) ? 0 : (aa) < (bb) ? -1 : 1)
392 static int olaps_cmp(const void *a, const void *b)
393 {
394 struct fastrpc_buf_overlap *pa = (struct fastrpc_buf_overlap *)a;
395 struct fastrpc_buf_overlap *pb = (struct fastrpc_buf_overlap *)b;
396 /* sort with lowest starting buffer first */
397 int st = CMP(pa->start, pb->start);
398 /* sort with highest ending buffer first */
399 int ed = CMP(pb->end, pa->end);
400
401 return st == 0 ? ed : st;
402 }
403
404 static void fastrpc_get_buff_overlaps(struct fastrpc_invoke_ctx *ctx)
405 {
406 u64 max_end = 0;
407 int i;
408
409 for (i = 0; i < ctx->nbufs; ++i) {
410 ctx->olaps[i].start = ctx->args[i].ptr;
411 ctx->olaps[i].end = ctx->olaps[i].start + ctx->args[i].length;
412 ctx->olaps[i].raix = i;
413 }
414
415 sort(ctx->olaps, ctx->nbufs, sizeof(*ctx->olaps), olaps_cmp, NULL);
416
417 for (i = 0; i < ctx->nbufs; ++i) {
418 /* Falling inside previous range */
419 if (ctx->olaps[i].start < max_end) {
420 ctx->olaps[i].mstart = max_end;
421 ctx->olaps[i].mend = ctx->olaps[i].end;
422 ctx->olaps[i].offset = max_end - ctx->olaps[i].start;
423
424 if (ctx->olaps[i].end > max_end) {
425 max_end = ctx->olaps[i].end;
426 } else {
427 ctx->olaps[i].mend = 0;
428 ctx->olaps[i].mstart = 0;
429 }
430
431 } else {
432 ctx->olaps[i].mend = ctx->olaps[i].end;
433 ctx->olaps[i].mstart = ctx->olaps[i].start;
434 ctx->olaps[i].offset = 0;
435 max_end = ctx->olaps[i].end;
436 }
437 }
438 }
439
440 static struct fastrpc_invoke_ctx *fastrpc_context_alloc(
441 struct fastrpc_user *user, u32 kernel, u32 sc,
442 struct fastrpc_invoke_args *args)
443 {
444 struct fastrpc_channel_ctx *cctx = user->cctx;
445 struct fastrpc_invoke_ctx *ctx = NULL;
446 unsigned long flags;
447 int ret;
448
449 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
450 if (!ctx)
451 return ERR_PTR(-ENOMEM);
452
453 INIT_LIST_HEAD(&ctx->node);
454 ctx->fl = user;
455 ctx->nscalars = REMOTE_SCALARS_LENGTH(sc);
456 ctx->nbufs = REMOTE_SCALARS_INBUFS(sc) +
457 REMOTE_SCALARS_OUTBUFS(sc);
458
459 if (ctx->nscalars) {
460 ctx->maps = kcalloc(ctx->nscalars,
461 sizeof(*ctx->maps), GFP_KERNEL);
462 if (!ctx->maps) {
463 kfree(ctx);
464 return ERR_PTR(-ENOMEM);
465 }
466 ctx->olaps = kcalloc(ctx->nscalars,
467 sizeof(*ctx->olaps), GFP_KERNEL);
468 if (!ctx->olaps) {
469 kfree(ctx->maps);
470 kfree(ctx);
471 return ERR_PTR(-ENOMEM);
472 }
473 ctx->args = args;
474 fastrpc_get_buff_overlaps(ctx);
475 }
476
477 /* Released in fastrpc_context_put() */
478 fastrpc_channel_ctx_get(cctx);
479
480 ctx->sc = sc;
481 ctx->retval = -1;
482 ctx->pid = current->pid;
483 ctx->tgid = user->tgid;
484 ctx->cctx = cctx;
485 init_completion(&ctx->work);
486 INIT_WORK(&ctx->put_work, fastrpc_context_put_wq);
487
488 spin_lock(&user->lock);
489 list_add_tail(&ctx->node, &user->pending);
490 spin_unlock(&user->lock);
491
492 spin_lock_irqsave(&cctx->lock, flags);
493 ret = idr_alloc_cyclic(&cctx->ctx_idr, ctx, 1,
494 FASTRPC_CTX_MAX, GFP_ATOMIC);
495 if (ret < 0) {
496 spin_unlock_irqrestore(&cctx->lock, flags);
497 goto err_idr;
498 }
499 ctx->ctxid = ret << 4;
500 spin_unlock_irqrestore(&cctx->lock, flags);
501
502 kref_init(&ctx->refcount);
503
504 return ctx;
505 err_idr:
506 spin_lock(&user->lock);
507 list_del(&ctx->node);
508 spin_unlock(&user->lock);
509 fastrpc_channel_ctx_put(cctx);
510 kfree(ctx->maps);
511 kfree(ctx->olaps);
512 kfree(ctx);
513
514 return ERR_PTR(ret);
515 }
516
517 static struct sg_table *
518 fastrpc_map_dma_buf(struct dma_buf_attachment *attachment,
519 enum dma_data_direction dir)
520 {
521 struct fastrpc_dma_buf_attachment *a = attachment->priv;
522 struct sg_table *table;
523
524 table = &a->sgt;
525
526 if (!dma_map_sgtable(attachment->dev, table, dir, 0))
527 return ERR_PTR(-ENOMEM);
528
529 return table;
530 }
531
532 static void fastrpc_unmap_dma_buf(struct dma_buf_attachment *attach,
533 struct sg_table *table,
534 enum dma_data_direction dir)
535 {
536 dma_unmap_sgtable(attach->dev, table, dir, 0);
537 }
538
539 static void fastrpc_release(struct dma_buf *dmabuf)
540 {
541 struct fastrpc_buf *buffer = dmabuf->priv;
542
543 fastrpc_buf_free(buffer);
544 }
545
546 static int fastrpc_dma_buf_attach(struct dma_buf *dmabuf,
547 struct dma_buf_attachment *attachment)
548 {
549 struct fastrpc_dma_buf_attachment *a;
550 struct fastrpc_buf *buffer = dmabuf->priv;
551 int ret;
552
553 a = kzalloc(sizeof(*a), GFP_KERNEL);
554 if (!a)
555 return -ENOMEM;
556
557 ret = dma_get_sgtable(buffer->dev, &a->sgt, buffer->virt,
558 FASTRPC_PHYS(buffer->phys), buffer->size);
559 if (ret < 0) {
560 dev_err(buffer->dev, "failed to get scatterlist from DMA API\n");
561 kfree(a);
562 return -EINVAL;
563 }
564
565 a->dev = attachment->dev;
566 INIT_LIST_HEAD(&a->node);
567 attachment->priv = a;
568
569 mutex_lock(&buffer->lock);
570 list_add(&a->node, &buffer->attachments);
571 mutex_unlock(&buffer->lock);
572
573 return 0;
574 }
575
576 static void fastrpc_dma_buf_detatch(struct dma_buf *dmabuf,
577 struct dma_buf_attachment *attachment)
578 {
579 struct fastrpc_dma_buf_attachment *a = attachment->priv;
580 struct fastrpc_buf *buffer = dmabuf->priv;
581
582 mutex_lock(&buffer->lock);
583 list_del(&a->node);
584 mutex_unlock(&buffer->lock);
585 sg_free_table(&a->sgt);
586 kfree(a);
587 }
588
589 static void *fastrpc_vmap(struct dma_buf *dmabuf)
590 {
591 struct fastrpc_buf *buf = dmabuf->priv;
592
593 return buf->virt;
594 }
595
596 static int fastrpc_mmap(struct dma_buf *dmabuf,
597 struct vm_area_struct *vma)
598 {
599 struct fastrpc_buf *buf = dmabuf->priv;
600 size_t size = vma->vm_end - vma->vm_start;
601
602 return dma_mmap_coherent(buf->dev, vma, buf->virt,
603 FASTRPC_PHYS(buf->phys), size);
604 }
605
606 static const struct dma_buf_ops fastrpc_dma_buf_ops = {
607 .attach = fastrpc_dma_buf_attach,
608 .detach = fastrpc_dma_buf_detatch,
609 .map_dma_buf = fastrpc_map_dma_buf,
610 .unmap_dma_buf = fastrpc_unmap_dma_buf,
611 .mmap = fastrpc_mmap,
612 .vmap = fastrpc_vmap,
613 .release = fastrpc_release,
614 };
615
616 static int fastrpc_map_create(struct fastrpc_user *fl, int fd,
617 u64 len, struct fastrpc_map **ppmap)
618 {
619 struct fastrpc_session_ctx *sess = fl->sctx;
620 struct fastrpc_map *map = NULL;
621 int err = 0;
622
623 if (!fastrpc_map_find(fl, fd, ppmap))
624 return 0;
625
626 map = kzalloc(sizeof(*map), GFP_KERNEL);
627 if (!map)
628 return -ENOMEM;
629
630 INIT_LIST_HEAD(&map->node);
631 map->fl = fl;
632 map->fd = fd;
633 map->buf = dma_buf_get(fd);
634 if (IS_ERR(map->buf)) {
635 err = PTR_ERR(map->buf);
636 goto get_err;
637 }
638
639 map->attach = dma_buf_attach(map->buf, sess->dev);
640 if (IS_ERR(map->attach)) {
641 dev_err(sess->dev, "Failed to attach dmabuf\n");
642 err = PTR_ERR(map->attach);
643 goto attach_err;
644 }
645
646 map->table = dma_buf_map_attachment(map->attach, DMA_BIDIRECTIONAL);
647 if (IS_ERR(map->table)) {
648 err = PTR_ERR(map->table);
649 goto map_err;
650 }
651
652 map->phys = sg_dma_address(map->table->sgl);
653 map->phys += ((u64)fl->sctx->sid << 32);
654 map->size = len;
655 map->va = sg_virt(map->table->sgl);
656 map->len = len;
657 kref_init(&map->refcount);
658
659 spin_lock(&fl->lock);
660 list_add_tail(&map->node, &fl->maps);
661 spin_unlock(&fl->lock);
662 *ppmap = map;
663
664 return 0;
665
666 map_err:
667 dma_buf_detach(map->buf, map->attach);
668 attach_err:
669 dma_buf_put(map->buf);
670 get_err:
671 kfree(map);
672
673 return err;
674 }
675
676 /*
677 * Fastrpc payload buffer with metadata looks like:
678 *
679 * >>>>>> START of METADATA <<<<<<<<<
680 * +---------------------------------+
681 * | Arguments |
682 * | type:(struct fastrpc_remote_arg)|
683 * | (0 - N) |
684 * +---------------------------------+
685 * | Invoke Buffer list |
686 * | type:(struct fastrpc_invoke_buf)|
687 * | (0 - N) |
688 * +---------------------------------+
689 * | Page info list |
690 * | type:(struct fastrpc_phy_page) |
691 * | (0 - N) |
692 * +---------------------------------+
693 * | Optional info |
694 * |(can be specific to SoC/Firmware)|
695 * +---------------------------------+
696 * >>>>>>>> END of METADATA <<<<<<<<<
697 * +---------------------------------+
698 * | Inline ARGS |
699 * | (0-N) |
700 * +---------------------------------+
701 */
702
703 static int fastrpc_get_meta_size(struct fastrpc_invoke_ctx *ctx)
704 {
705 int size = 0;
706
707 size = (sizeof(struct fastrpc_remote_arg) +
708 sizeof(struct fastrpc_invoke_buf) +
709 sizeof(struct fastrpc_phy_page)) * ctx->nscalars +
710 sizeof(u64) * FASTRPC_MAX_FDLIST +
711 sizeof(u32) * FASTRPC_MAX_CRCLIST;
712
713 return size;
714 }
715
716 static u64 fastrpc_get_payload_size(struct fastrpc_invoke_ctx *ctx, int metalen)
717 {
718 u64 size = 0;
719 int i;
720
721 size = ALIGN(metalen, FASTRPC_ALIGN);
722 for (i = 0; i < ctx->nscalars; i++) {
723 if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1) {
724
725 if (ctx->olaps[i].offset == 0)
726 size = ALIGN(size, FASTRPC_ALIGN);
727
728 size += (ctx->olaps[i].mend - ctx->olaps[i].mstart);
729 }
730 }
731
732 return size;
733 }
734
735 static int fastrpc_create_maps(struct fastrpc_invoke_ctx *ctx)
736 {
737 struct device *dev = ctx->fl->sctx->dev;
738 int i, err;
739
740 for (i = 0; i < ctx->nscalars; ++i) {
741 /* Make sure reserved field is set to 0 */
742 if (ctx->args[i].reserved)
743 return -EINVAL;
744
745 if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1 ||
746 ctx->args[i].length == 0)
747 continue;
748
749 err = fastrpc_map_create(ctx->fl, ctx->args[i].fd,
750 ctx->args[i].length, &ctx->maps[i]);
751 if (err) {
752 dev_err(dev, "Error Creating map %d\n", err);
753 return -EINVAL;
754 }
755
756 }
757 return 0;
758 }
759
760 static int fastrpc_get_args(u32 kernel, struct fastrpc_invoke_ctx *ctx)
761 {
762 struct device *dev = ctx->fl->sctx->dev;
763 struct fastrpc_remote_arg *rpra;
764 struct fastrpc_invoke_buf *list;
765 struct fastrpc_phy_page *pages;
766 int inbufs, i, oix, err = 0;
767 u64 len, rlen, pkt_size;
768 u64 pg_start, pg_end;
769 uintptr_t args;
770 int metalen;
771
772 inbufs = REMOTE_SCALARS_INBUFS(ctx->sc);
773 metalen = fastrpc_get_meta_size(ctx);
774 pkt_size = fastrpc_get_payload_size(ctx, metalen);
775
776 err = fastrpc_create_maps(ctx);
777 if (err)
778 return err;
779
780 ctx->msg_sz = pkt_size;
781
782 err = fastrpc_buf_alloc(ctx->fl, dev, pkt_size, &ctx->buf);
783 if (err)
784 return err;
785
786 rpra = ctx->buf->virt;
787 list = ctx->buf->virt + ctx->nscalars * sizeof(*rpra);
788 pages = ctx->buf->virt + ctx->nscalars * (sizeof(*list) +
789 sizeof(*rpra));
790 args = (uintptr_t)ctx->buf->virt + metalen;
791 rlen = pkt_size - metalen;
792 ctx->rpra = rpra;
793
794 for (oix = 0; oix < ctx->nbufs; ++oix) {
795 int mlen;
796
797 i = ctx->olaps[oix].raix;
798 len = ctx->args[i].length;
799
800 rpra[i].pv = 0;
801 rpra[i].len = len;
802 list[i].num = len ? 1 : 0;
803 list[i].pgidx = i;
804
805 if (!len)
806 continue;
807
808 if (ctx->maps[i]) {
809 struct vm_area_struct *vma = NULL;
810
811 rpra[i].pv = (u64) ctx->args[i].ptr;
812 pages[i].addr = ctx->maps[i]->phys;
813
814 vma = find_vma(current->mm, ctx->args[i].ptr);
815 if (vma)
816 pages[i].addr += ctx->args[i].ptr -
817 vma->vm_start;
818
819 pg_start = (ctx->args[i].ptr & PAGE_MASK) >> PAGE_SHIFT;
820 pg_end = ((ctx->args[i].ptr + len - 1) & PAGE_MASK) >>
821 PAGE_SHIFT;
822 pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE;
823
824 } else {
825
826 if (ctx->olaps[oix].offset == 0) {
827 rlen -= ALIGN(args, FASTRPC_ALIGN) - args;
828 args = ALIGN(args, FASTRPC_ALIGN);
829 }
830
831 mlen = ctx->olaps[oix].mend - ctx->olaps[oix].mstart;
832
833 if (rlen < mlen)
834 goto bail;
835
836 rpra[i].pv = args - ctx->olaps[oix].offset;
837 pages[i].addr = ctx->buf->phys -
838 ctx->olaps[oix].offset +
839 (pkt_size - rlen);
840 pages[i].addr = pages[i].addr & PAGE_MASK;
841
842 pg_start = (args & PAGE_MASK) >> PAGE_SHIFT;
843 pg_end = ((args + len - 1) & PAGE_MASK) >> PAGE_SHIFT;
844 pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE;
845 args = args + mlen;
846 rlen -= mlen;
847 }
848
849 if (i < inbufs && !ctx->maps[i]) {
850 void *dst = (void *)(uintptr_t)rpra[i].pv;
851 void *src = (void *)(uintptr_t)ctx->args[i].ptr;
852
853 if (!kernel) {
854 if (copy_from_user(dst, (void __user *)src,
855 len)) {
856 err = -EFAULT;
857 goto bail;
858 }
859 } else {
860 memcpy(dst, src, len);
861 }
862 }
863 }
864
865 for (i = ctx->nbufs; i < ctx->nscalars; ++i) {
866 rpra[i].pv = (u64) ctx->args[i].ptr;
867 rpra[i].len = ctx->args[i].length;
868 list[i].num = ctx->args[i].length ? 1 : 0;
869 list[i].pgidx = i;
870 pages[i].addr = ctx->maps[i]->phys;
871 pages[i].size = ctx->maps[i]->size;
872 }
873
874 bail:
875 if (err)
876 dev_err(dev, "Error: get invoke args failed:%d\n", err);
877
878 return err;
879 }
880
881 static int fastrpc_put_args(struct fastrpc_invoke_ctx *ctx,
882 u32 kernel)
883 {
884 struct fastrpc_remote_arg *rpra = ctx->rpra;
885 int i, inbufs;
886
887 inbufs = REMOTE_SCALARS_INBUFS(ctx->sc);
888
889 for (i = inbufs; i < ctx->nbufs; ++i) {
890 void *src = (void *)(uintptr_t)rpra[i].pv;
891 void *dst = (void *)(uintptr_t)ctx->args[i].ptr;
892 u64 len = rpra[i].len;
893
894 if (!kernel) {
895 if (copy_to_user((void __user *)dst, src, len))
896 return -EFAULT;
897 } else {
898 memcpy(dst, src, len);
899 }
900 }
901
902 return 0;
903 }
904
905 static int fastrpc_invoke_send(struct fastrpc_session_ctx *sctx,
906 struct fastrpc_invoke_ctx *ctx,
907 u32 kernel, uint32_t handle)
908 {
909 struct fastrpc_channel_ctx *cctx;
910 struct fastrpc_user *fl = ctx->fl;
911 struct fastrpc_msg *msg = &ctx->msg;
912 int ret;
913
914 cctx = fl->cctx;
915 msg->pid = fl->tgid;
916 msg->tid = current->pid;
917
918 if (kernel)
919 msg->pid = 0;
920
921 msg->ctx = ctx->ctxid | fl->pd;
922 msg->handle = handle;
923 msg->sc = ctx->sc;
924 msg->addr = ctx->buf ? ctx->buf->phys : 0;
925 msg->size = roundup(ctx->msg_sz, PAGE_SIZE);
926 fastrpc_context_get(ctx);
927
928 ret = rpmsg_send(cctx->rpdev->ept, (void *)msg, sizeof(*msg));
929
930 if (ret)
931 fastrpc_context_put(ctx);
932
933 return ret;
934
935 }
936
937 static int fastrpc_internal_invoke(struct fastrpc_user *fl, u32 kernel,
938 u32 handle, u32 sc,
939 struct fastrpc_invoke_args *args)
940 {
941 struct fastrpc_invoke_ctx *ctx = NULL;
942 int err = 0;
943
944 if (!fl->sctx)
945 return -EINVAL;
946
947 if (!fl->cctx->rpdev)
948 return -EPIPE;
949
950 ctx = fastrpc_context_alloc(fl, kernel, sc, args);
951 if (IS_ERR(ctx))
952 return PTR_ERR(ctx);
953
954 if (ctx->nscalars) {
955 err = fastrpc_get_args(kernel, ctx);
956 if (err)
957 goto bail;
958 }
959
960 /* make sure that all CPU memory writes are seen by DSP */
961 dma_wmb();
962 /* Send invoke buffer to remote dsp */
963 err = fastrpc_invoke_send(fl->sctx, ctx, kernel, handle);
964 if (err)
965 goto bail;
966
967 if (kernel) {
968 if (!wait_for_completion_timeout(&ctx->work, 10 * HZ))
969 err = -ETIMEDOUT;
970 } else {
971 err = wait_for_completion_interruptible(&ctx->work);
972 }
973
974 if (err)
975 goto bail;
976
977 /* Check the response from remote dsp */
978 err = ctx->retval;
979 if (err)
980 goto bail;
981
982 if (ctx->nscalars) {
983 /* make sure that all memory writes by DSP are seen by CPU */
984 dma_rmb();
985 /* populate all the output buffers with results */
986 err = fastrpc_put_args(ctx, kernel);
987 if (err)
988 goto bail;
989 }
990
991 bail:
992 if (err != -ERESTARTSYS && err != -ETIMEDOUT) {
993 /* We are done with this compute context */
994 spin_lock(&fl->lock);
995 list_del(&ctx->node);
996 spin_unlock(&fl->lock);
997 fastrpc_context_put(ctx);
998 }
999 if (err)
1000 dev_dbg(fl->sctx->dev, "Error: Invoke Failed %d\n", err);
1001
1002 return err;
1003 }
1004
1005 static int fastrpc_init_create_process(struct fastrpc_user *fl,
1006 char __user *argp)
1007 {
1008 struct fastrpc_init_create init;
1009 struct fastrpc_invoke_args *args;
1010 struct fastrpc_phy_page pages[1];
1011 struct fastrpc_map *map = NULL;
1012 struct fastrpc_buf *imem = NULL;
1013 int memlen;
1014 int err;
1015 struct {
1016 int pgid;
1017 u32 namelen;
1018 u32 filelen;
1019 u32 pageslen;
1020 u32 attrs;
1021 u32 siglen;
1022 } inbuf;
1023 u32 sc;
1024
1025 args = kcalloc(FASTRPC_CREATE_PROCESS_NARGS, sizeof(*args), GFP_KERNEL);
1026 if (!args)
1027 return -ENOMEM;
1028
1029 if (copy_from_user(&init, argp, sizeof(init))) {
1030 err = -EFAULT;
1031 goto err;
1032 }
1033
1034 if (init.filelen > INIT_FILELEN_MAX) {
1035 err = -EINVAL;
1036 goto err;
1037 }
1038
1039 inbuf.pgid = fl->tgid;
1040 inbuf.namelen = strlen(current->comm) + 1;
1041 inbuf.filelen = init.filelen;
1042 inbuf.pageslen = 1;
1043 inbuf.attrs = init.attrs;
1044 inbuf.siglen = init.siglen;
1045 fl->pd = USER_PD;
1046
1047 if (init.filelen && init.filefd) {
1048 err = fastrpc_map_create(fl, init.filefd, init.filelen, &map);
1049 if (err)
1050 goto err;
1051 }
1052
1053 memlen = ALIGN(max(INIT_FILELEN_MAX, (int)init.filelen * 4),
1054 1024 * 1024);
1055 err = fastrpc_buf_alloc(fl, fl->sctx->dev, memlen,
1056 &imem);
1057 if (err)
1058 goto err_alloc;
1059
1060 fl->init_mem = imem;
1061 args[0].ptr = (u64)(uintptr_t)&inbuf;
1062 args[0].length = sizeof(inbuf);
1063 args[0].fd = -1;
1064
1065 args[1].ptr = (u64)(uintptr_t)current->comm;
1066 args[1].length = inbuf.namelen;
1067 args[1].fd = -1;
1068
1069 args[2].ptr = (u64) init.file;
1070 args[2].length = inbuf.filelen;
1071 args[2].fd = init.filefd;
1072
1073 pages[0].addr = imem->phys;
1074 pages[0].size = imem->size;
1075
1076 args[3].ptr = (u64)(uintptr_t) pages;
1077 args[3].length = 1 * sizeof(*pages);
1078 args[3].fd = -1;
1079
1080 args[4].ptr = (u64)(uintptr_t)&inbuf.attrs;
1081 args[4].length = sizeof(inbuf.attrs);
1082 args[4].fd = -1;
1083
1084 args[5].ptr = (u64)(uintptr_t) &inbuf.siglen;
1085 args[5].length = sizeof(inbuf.siglen);
1086 args[5].fd = -1;
1087
1088 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE, 4, 0);
1089 if (init.attrs)
1090 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE_ATTR, 6, 0);
1091
1092 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE,
1093 sc, args);
1094 if (err)
1095 goto err_invoke;
1096
1097 kfree(args);
1098
1099 return 0;
1100
1101 err_invoke:
1102 fl->init_mem = NULL;
1103 fastrpc_buf_free(imem);
1104 err_alloc:
1105 if (map) {
1106 spin_lock(&fl->lock);
1107 list_del(&map->node);
1108 spin_unlock(&fl->lock);
1109 fastrpc_map_put(map);
1110 }
1111 err:
1112 kfree(args);
1113
1114 return err;
1115 }
1116
1117 static struct fastrpc_session_ctx *fastrpc_session_alloc(
1118 struct fastrpc_channel_ctx *cctx)
1119 {
1120 struct fastrpc_session_ctx *session = NULL;
1121 unsigned long flags;
1122 int i;
1123
1124 spin_lock_irqsave(&cctx->lock, flags);
1125 for (i = 0; i < cctx->sesscount; i++) {
1126 if (!cctx->session[i].used && cctx->session[i].valid) {
1127 cctx->session[i].used = true;
1128 session = &cctx->session[i];
1129 break;
1130 }
1131 }
1132 spin_unlock_irqrestore(&cctx->lock, flags);
1133
1134 return session;
1135 }
1136
1137 static void fastrpc_session_free(struct fastrpc_channel_ctx *cctx,
1138 struct fastrpc_session_ctx *session)
1139 {
1140 unsigned long flags;
1141
1142 spin_lock_irqsave(&cctx->lock, flags);
1143 session->used = false;
1144 spin_unlock_irqrestore(&cctx->lock, flags);
1145 }
1146
1147 static int fastrpc_release_current_dsp_process(struct fastrpc_user *fl)
1148 {
1149 struct fastrpc_invoke_args args[1];
1150 int tgid = 0;
1151 u32 sc;
1152
1153 tgid = fl->tgid;
1154 args[0].ptr = (u64)(uintptr_t) &tgid;
1155 args[0].length = sizeof(tgid);
1156 args[0].fd = -1;
1157 args[0].reserved = 0;
1158 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_RELEASE, 1, 0);
1159
1160 return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE,
1161 sc, &args[0]);
1162 }
1163
1164 static int fastrpc_device_release(struct inode *inode, struct file *file)
1165 {
1166 struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data;
1167 struct fastrpc_channel_ctx *cctx = fl->cctx;
1168 struct fastrpc_invoke_ctx *ctx, *n;
1169 struct fastrpc_map *map, *m;
1170 struct fastrpc_buf *buf, *b;
1171 unsigned long flags;
1172
1173 fastrpc_release_current_dsp_process(fl);
1174
1175 spin_lock_irqsave(&cctx->lock, flags);
1176 list_del(&fl->user);
1177 spin_unlock_irqrestore(&cctx->lock, flags);
1178
1179 if (fl->init_mem)
1180 fastrpc_buf_free(fl->init_mem);
1181
1182 list_for_each_entry_safe(ctx, n, &fl->pending, node) {
1183 list_del(&ctx->node);
1184 fastrpc_context_put(ctx);
1185 }
1186
1187 list_for_each_entry_safe(map, m, &fl->maps, node) {
1188 list_del(&map->node);
1189 fastrpc_map_put(map);
1190 }
1191
1192 list_for_each_entry_safe(buf, b, &fl->mmaps, node) {
1193 list_del(&buf->node);
1194 fastrpc_buf_free(buf);
1195 }
1196
1197 fastrpc_session_free(cctx, fl->sctx);
1198 fastrpc_channel_ctx_put(cctx);
1199
1200 mutex_destroy(&fl->mutex);
1201 kfree(fl);
1202 file->private_data = NULL;
1203
1204 return 0;
1205 }
1206
1207 static int fastrpc_device_open(struct inode *inode, struct file *filp)
1208 {
1209 struct fastrpc_channel_ctx *cctx = miscdev_to_cctx(filp->private_data);
1210 struct fastrpc_user *fl = NULL;
1211 unsigned long flags;
1212
1213 fl = kzalloc(sizeof(*fl), GFP_KERNEL);
1214 if (!fl)
1215 return -ENOMEM;
1216
1217 /* Released in fastrpc_device_release() */
1218 fastrpc_channel_ctx_get(cctx);
1219
1220 filp->private_data = fl;
1221 spin_lock_init(&fl->lock);
1222 mutex_init(&fl->mutex);
1223 INIT_LIST_HEAD(&fl->pending);
1224 INIT_LIST_HEAD(&fl->maps);
1225 INIT_LIST_HEAD(&fl->mmaps);
1226 INIT_LIST_HEAD(&fl->user);
1227 fl->tgid = current->tgid;
1228 fl->cctx = cctx;
1229
1230 fl->sctx = fastrpc_session_alloc(cctx);
1231 if (!fl->sctx) {
1232 dev_err(&cctx->rpdev->dev, "No session available\n");
1233 mutex_destroy(&fl->mutex);
1234 kfree(fl);
1235
1236 return -EBUSY;
1237 }
1238
1239 spin_lock_irqsave(&cctx->lock, flags);
1240 list_add_tail(&fl->user, &cctx->users);
1241 spin_unlock_irqrestore(&cctx->lock, flags);
1242
1243 return 0;
1244 }
1245
1246 static int fastrpc_dmabuf_alloc(struct fastrpc_user *fl, char __user *argp)
1247 {
1248 struct fastrpc_alloc_dma_buf bp;
1249 DEFINE_DMA_BUF_EXPORT_INFO(exp_info);
1250 struct fastrpc_buf *buf = NULL;
1251 int err;
1252
1253 if (copy_from_user(&bp, argp, sizeof(bp)))
1254 return -EFAULT;
1255
1256 err = fastrpc_buf_alloc(fl, fl->sctx->dev, bp.size, &buf);
1257 if (err)
1258 return err;
1259 exp_info.ops = &fastrpc_dma_buf_ops;
1260 exp_info.size = bp.size;
1261 exp_info.flags = O_RDWR;
1262 exp_info.priv = buf;
1263 buf->dmabuf = dma_buf_export(&exp_info);
1264 if (IS_ERR(buf->dmabuf)) {
1265 err = PTR_ERR(buf->dmabuf);
1266 fastrpc_buf_free(buf);
1267 return err;
1268 }
1269
1270 bp.fd = dma_buf_fd(buf->dmabuf, O_ACCMODE);
1271 if (bp.fd < 0) {
1272 dma_buf_put(buf->dmabuf);
1273 return -EINVAL;
1274 }
1275
1276 if (copy_to_user(argp, &bp, sizeof(bp))) {
1277 dma_buf_put(buf->dmabuf);
1278 return -EFAULT;
1279 }
1280
1281 return 0;
1282 }
1283
1284 static int fastrpc_init_attach(struct fastrpc_user *fl, int pd)
1285 {
1286 struct fastrpc_invoke_args args[1];
1287 int tgid = fl->tgid;
1288 u32 sc;
1289
1290 args[0].ptr = (u64)(uintptr_t) &tgid;
1291 args[0].length = sizeof(tgid);
1292 args[0].fd = -1;
1293 args[0].reserved = 0;
1294 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_ATTACH, 1, 0);
1295 fl->pd = pd;
1296
1297 return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE,
1298 sc, &args[0]);
1299 }
1300
1301 static int fastrpc_invoke(struct fastrpc_user *fl, char __user *argp)
1302 {
1303 struct fastrpc_invoke_args *args = NULL;
1304 struct fastrpc_invoke inv;
1305 u32 nscalars;
1306 int err;
1307
1308 if (copy_from_user(&inv, argp, sizeof(inv)))
1309 return -EFAULT;
1310
1311 /* nscalars is truncated here to max supported value */
1312 nscalars = REMOTE_SCALARS_LENGTH(inv.sc);
1313 if (nscalars) {
1314 args = kcalloc(nscalars, sizeof(*args), GFP_KERNEL);
1315 if (!args)
1316 return -ENOMEM;
1317
1318 if (copy_from_user(args, (void __user *)(uintptr_t)inv.args,
1319 nscalars * sizeof(*args))) {
1320 kfree(args);
1321 return -EFAULT;
1322 }
1323 }
1324
1325 err = fastrpc_internal_invoke(fl, false, inv.handle, inv.sc, args);
1326 kfree(args);
1327
1328 return err;
1329 }
1330
1331 static int fastrpc_req_munmap_impl(struct fastrpc_user *fl,
1332 struct fastrpc_req_munmap *req)
1333 {
1334 struct fastrpc_invoke_args args[1] = { [0] = { 0 } };
1335 struct fastrpc_buf *buf, *b;
1336 struct fastrpc_munmap_req_msg req_msg;
1337 struct device *dev = fl->sctx->dev;
1338 int err;
1339 u32 sc;
1340
1341 spin_lock(&fl->lock);
1342 list_for_each_entry_safe(buf, b, &fl->mmaps, node) {
1343 if ((buf->raddr == req->vaddrout) && (buf->size == req->size))
1344 break;
1345 buf = NULL;
1346 }
1347 spin_unlock(&fl->lock);
1348
1349 if (!buf) {
1350 dev_err(dev, "mmap not in list\n");
1351 return -EINVAL;
1352 }
1353
1354 req_msg.pgid = fl->tgid;
1355 req_msg.size = buf->size;
1356 req_msg.vaddr = buf->raddr;
1357
1358 args[0].ptr = (u64) (uintptr_t) &req_msg;
1359 args[0].length = sizeof(req_msg);
1360
1361 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MUNMAP, 1, 0);
1362 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc,
1363 &args[0]);
1364 if (!err) {
1365 dev_dbg(dev, "unmmap\tpt 0x%09lx OK\n", buf->raddr);
1366 spin_lock(&fl->lock);
1367 list_del(&buf->node);
1368 spin_unlock(&fl->lock);
1369 fastrpc_buf_free(buf);
1370 } else {
1371 dev_err(dev, "unmmap\tpt 0x%09lx ERROR\n", buf->raddr);
1372 }
1373
1374 return err;
1375 }
1376
1377 static int fastrpc_req_munmap(struct fastrpc_user *fl, char __user *argp)
1378 {
1379 struct fastrpc_req_munmap req;
1380
1381 if (copy_from_user(&req, argp, sizeof(req)))
1382 return -EFAULT;
1383
1384 return fastrpc_req_munmap_impl(fl, &req);
1385 }
1386
1387 static int fastrpc_req_mmap(struct fastrpc_user *fl, char __user *argp)
1388 {
1389 struct fastrpc_invoke_args args[3] = { [0 ... 2] = { 0 } };
1390 struct fastrpc_buf *buf = NULL;
1391 struct fastrpc_mmap_req_msg req_msg;
1392 struct fastrpc_mmap_rsp_msg rsp_msg;
1393 struct fastrpc_req_munmap req_unmap;
1394 struct fastrpc_phy_page pages;
1395 struct fastrpc_req_mmap req;
1396 struct device *dev = fl->sctx->dev;
1397 int err;
1398 u32 sc;
1399
1400 if (copy_from_user(&req, argp, sizeof(req)))
1401 return -EFAULT;
1402
1403 if (req.flags != ADSP_MMAP_ADD_PAGES) {
1404 dev_err(dev, "flag not supported 0x%x\n", req.flags);
1405 return -EINVAL;
1406 }
1407
1408 if (req.vaddrin) {
1409 dev_err(dev, "adding user allocated pages is not supported\n");
1410 return -EINVAL;
1411 }
1412
1413 err = fastrpc_buf_alloc(fl, fl->sctx->dev, req.size, &buf);
1414 if (err) {
1415 dev_err(dev, "failed to allocate buffer\n");
1416 return err;
1417 }
1418
1419 req_msg.pgid = fl->tgid;
1420 req_msg.flags = req.flags;
1421 req_msg.vaddr = req.vaddrin;
1422 req_msg.num = sizeof(pages);
1423
1424 args[0].ptr = (u64) (uintptr_t) &req_msg;
1425 args[0].length = sizeof(req_msg);
1426
1427 pages.addr = buf->phys;
1428 pages.size = buf->size;
1429
1430 args[1].ptr = (u64) (uintptr_t) &pages;
1431 args[1].length = sizeof(pages);
1432
1433 args[2].ptr = (u64) (uintptr_t) &rsp_msg;
1434 args[2].length = sizeof(rsp_msg);
1435
1436 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MMAP, 2, 1);
1437 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc,
1438 &args[0]);
1439 if (err) {
1440 dev_err(dev, "mmap error (len 0x%08llx)\n", buf->size);
1441 goto err_invoke;
1442 }
1443
1444 /* update the buffer to be able to deallocate the memory on the DSP */
1445 buf->raddr = (uintptr_t) rsp_msg.vaddr;
1446
1447 /* let the client know the address to use */
1448 req.vaddrout = rsp_msg.vaddr;
1449
1450 spin_lock(&fl->lock);
1451 list_add_tail(&buf->node, &fl->mmaps);
1452 spin_unlock(&fl->lock);
1453
1454 if (copy_to_user((void __user *)argp, &req, sizeof(req))) {
1455 /* unmap the memory and release the buffer */
1456 req_unmap.vaddrout = buf->raddr;
1457 req_unmap.size = buf->size;
1458 fastrpc_req_munmap_impl(fl, &req_unmap);
1459 return -EFAULT;
1460 }
1461
1462 dev_dbg(dev, "mmap\t\tpt 0x%09lx OK [len 0x%08llx]\n",
1463 buf->raddr, buf->size);
1464
1465 return 0;
1466
1467 err_invoke:
1468 fastrpc_buf_free(buf);
1469
1470 return err;
1471 }
1472
1473 static long fastrpc_device_ioctl(struct file *file, unsigned int cmd,
1474 unsigned long arg)
1475 {
1476 struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data;
1477 char __user *argp = (char __user *)arg;
1478 int err;
1479
1480 switch (cmd) {
1481 case FASTRPC_IOCTL_INVOKE:
1482 err = fastrpc_invoke(fl, argp);
1483 break;
1484 case FASTRPC_IOCTL_INIT_ATTACH:
1485 err = fastrpc_init_attach(fl, AUDIO_PD);
1486 break;
1487 case FASTRPC_IOCTL_INIT_ATTACH_SNS:
1488 err = fastrpc_init_attach(fl, SENSORS_PD);
1489 break;
1490 case FASTRPC_IOCTL_INIT_CREATE:
1491 err = fastrpc_init_create_process(fl, argp);
1492 break;
1493 case FASTRPC_IOCTL_ALLOC_DMA_BUFF:
1494 err = fastrpc_dmabuf_alloc(fl, argp);
1495 break;
1496 case FASTRPC_IOCTL_MMAP:
1497 err = fastrpc_req_mmap(fl, argp);
1498 break;
1499 case FASTRPC_IOCTL_MUNMAP:
1500 err = fastrpc_req_munmap(fl, argp);
1501 break;
1502 default:
1503 err = -ENOTTY;
1504 break;
1505 }
1506
1507 return err;
1508 }
1509
1510 static const struct file_operations fastrpc_fops = {
1511 .open = fastrpc_device_open,
1512 .release = fastrpc_device_release,
1513 .unlocked_ioctl = fastrpc_device_ioctl,
1514 .compat_ioctl = fastrpc_device_ioctl,
1515 };
1516
1517 static int fastrpc_cb_probe(struct platform_device *pdev)
1518 {
1519 struct fastrpc_channel_ctx *cctx;
1520 struct fastrpc_session_ctx *sess;
1521 struct device *dev = &pdev->dev;
1522 int i, sessions = 0;
1523 unsigned long flags;
1524 int rc;
1525
1526 cctx = dev_get_drvdata(dev->parent);
1527 if (!cctx)
1528 return -EINVAL;
1529
1530 of_property_read_u32(dev->of_node, "qcom,nsessions", &sessions);
1531
1532 spin_lock_irqsave(&cctx->lock, flags);
1533 sess = &cctx->session[cctx->sesscount];
1534 sess->used = false;
1535 sess->valid = true;
1536 sess->dev = dev;
1537 dev_set_drvdata(dev, sess);
1538
1539 if (of_property_read_u32(dev->of_node, "reg", &sess->sid))
1540 dev_info(dev, "FastRPC Session ID not specified in DT\n");
1541
1542 if (sessions > 0) {
1543 struct fastrpc_session_ctx *dup_sess;
1544
1545 for (i = 1; i < sessions; i++) {
1546 if (cctx->sesscount++ >= FASTRPC_MAX_SESSIONS)
1547 break;
1548 dup_sess = &cctx->session[cctx->sesscount];
1549 memcpy(dup_sess, sess, sizeof(*dup_sess));
1550 }
1551 }
1552 cctx->sesscount++;
1553 spin_unlock_irqrestore(&cctx->lock, flags);
1554 rc = dma_set_mask(dev, DMA_BIT_MASK(32));
1555 if (rc) {
1556 dev_err(dev, "32-bit DMA enable failed\n");
1557 return rc;
1558 }
1559
1560 return 0;
1561 }
1562
1563 static int fastrpc_cb_remove(struct platform_device *pdev)
1564 {
1565 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(pdev->dev.parent);
1566 struct fastrpc_session_ctx *sess = dev_get_drvdata(&pdev->dev);
1567 unsigned long flags;
1568 int i;
1569
1570 spin_lock_irqsave(&cctx->lock, flags);
1571 for (i = 1; i < FASTRPC_MAX_SESSIONS; i++) {
1572 if (cctx->session[i].sid == sess->sid) {
1573 cctx->session[i].valid = false;
1574 cctx->sesscount--;
1575 }
1576 }
1577 spin_unlock_irqrestore(&cctx->lock, flags);
1578
1579 return 0;
1580 }
1581
1582 static const struct of_device_id fastrpc_match_table[] = {
1583 { .compatible = "qcom,fastrpc-compute-cb", },
1584 {}
1585 };
1586
1587 static struct platform_driver fastrpc_cb_driver = {
1588 .probe = fastrpc_cb_probe,
1589 .remove = fastrpc_cb_remove,
1590 .driver = {
1591 .name = "qcom,fastrpc-cb",
1592 .of_match_table = fastrpc_match_table,
1593 .suppress_bind_attrs = true,
1594 },
1595 };
1596
1597 static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev)
1598 {
1599 struct device *rdev = &rpdev->dev;
1600 struct fastrpc_channel_ctx *data;
1601 int i, err, domain_id = -1;
1602 const char *domain;
1603
1604 err = of_property_read_string(rdev->of_node, "label", &domain);
1605 if (err) {
1606 dev_info(rdev, "FastRPC Domain not specified in DT\n");
1607 return err;
1608 }
1609
1610 for (i = 0; i <= CDSP_DOMAIN_ID; i++) {
1611 if (!strcmp(domains[i], domain)) {
1612 domain_id = i;
1613 break;
1614 }
1615 }
1616
1617 if (domain_id < 0) {
1618 dev_info(rdev, "FastRPC Invalid Domain ID %d\n", domain_id);
1619 return -EINVAL;
1620 }
1621
1622 data = kzalloc(sizeof(*data), GFP_KERNEL);
1623 if (!data)
1624 return -ENOMEM;
1625
1626 data->miscdev.minor = MISC_DYNAMIC_MINOR;
1627 data->miscdev.name = devm_kasprintf(rdev, GFP_KERNEL, "fastrpc-%s",
1628 domains[domain_id]);
1629 data->miscdev.fops = &fastrpc_fops;
1630 err = misc_register(&data->miscdev);
1631 if (err) {
1632 kfree(data);
1633 return err;
1634 }
1635
1636 kref_init(&data->refcount);
1637
1638 dev_set_drvdata(&rpdev->dev, data);
1639 dma_set_mask_and_coherent(rdev, DMA_BIT_MASK(32));
1640 INIT_LIST_HEAD(&data->users);
1641 spin_lock_init(&data->lock);
1642 idr_init(&data->ctx_idr);
1643 data->domain_id = domain_id;
1644 data->rpdev = rpdev;
1645
1646 return of_platform_populate(rdev->of_node, NULL, NULL, rdev);
1647 }
1648
1649 static void fastrpc_notify_users(struct fastrpc_user *user)
1650 {
1651 struct fastrpc_invoke_ctx *ctx;
1652
1653 spin_lock(&user->lock);
1654 list_for_each_entry(ctx, &user->pending, node)
1655 complete(&ctx->work);
1656 spin_unlock(&user->lock);
1657 }
1658
1659 static void fastrpc_rpmsg_remove(struct rpmsg_device *rpdev)
1660 {
1661 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev);
1662 struct fastrpc_user *user;
1663 unsigned long flags;
1664
1665 spin_lock_irqsave(&cctx->lock, flags);
1666 list_for_each_entry(user, &cctx->users, user)
1667 fastrpc_notify_users(user);
1668 spin_unlock_irqrestore(&cctx->lock, flags);
1669
1670 misc_deregister(&cctx->miscdev);
1671 of_platform_depopulate(&rpdev->dev);
1672
1673 cctx->rpdev = NULL;
1674 fastrpc_channel_ctx_put(cctx);
1675 }
1676
1677 static int fastrpc_rpmsg_callback(struct rpmsg_device *rpdev, void *data,
1678 int len, void *priv, u32 addr)
1679 {
1680 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev);
1681 struct fastrpc_invoke_rsp *rsp = data;
1682 struct fastrpc_invoke_ctx *ctx;
1683 unsigned long flags;
1684 unsigned long ctxid;
1685
1686 if (len < sizeof(*rsp))
1687 return -EINVAL;
1688
1689 ctxid = ((rsp->ctx & FASTRPC_CTXID_MASK) >> 4);
1690
1691 spin_lock_irqsave(&cctx->lock, flags);
1692 ctx = idr_find(&cctx->ctx_idr, ctxid);
1693 spin_unlock_irqrestore(&cctx->lock, flags);
1694
1695 if (!ctx) {
1696 dev_err(&rpdev->dev, "No context ID matches response\n");
1697 return -ENOENT;
1698 }
1699
1700 ctx->retval = rsp->retval;
1701 complete(&ctx->work);
1702
1703 /*
1704 * The DMA buffer associated with the context cannot be freed in
1705 * interrupt context so schedule it through a worker thread to
1706 * avoid a kernel BUG.
1707 */
1708 schedule_work(&ctx->put_work);
1709
1710 return 0;
1711 }
1712
1713 static const struct of_device_id fastrpc_rpmsg_of_match[] = {
1714 { .compatible = "qcom,fastrpc" },
1715 { },
1716 };
1717 MODULE_DEVICE_TABLE(of, fastrpc_rpmsg_of_match);
1718
1719 static struct rpmsg_driver fastrpc_driver = {
1720 .probe = fastrpc_rpmsg_probe,
1721 .remove = fastrpc_rpmsg_remove,
1722 .callback = fastrpc_rpmsg_callback,
1723 .drv = {
1724 .name = "qcom,fastrpc",
1725 .of_match_table = fastrpc_rpmsg_of_match,
1726 },
1727 };
1728
1729 static int fastrpc_init(void)
1730 {
1731 int ret;
1732
1733 ret = platform_driver_register(&fastrpc_cb_driver);
1734 if (ret < 0) {
1735 pr_err("fastrpc: failed to register cb driver\n");
1736 return ret;
1737 }
1738
1739 ret = register_rpmsg_driver(&fastrpc_driver);
1740 if (ret < 0) {
1741 pr_err("fastrpc: failed to register rpmsg driver\n");
1742 platform_driver_unregister(&fastrpc_cb_driver);
1743 return ret;
1744 }
1745
1746 return 0;
1747 }
1748 module_init(fastrpc_init);
1749
1750 static void fastrpc_exit(void)
1751 {
1752 platform_driver_unregister(&fastrpc_cb_driver);
1753 unregister_rpmsg_driver(&fastrpc_driver);
1754 }
1755 module_exit(fastrpc_exit);
1756
1757 MODULE_LICENSE("GPL v2");
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