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Merge tag 'sched-core-2024-09-19' of git://git.kernel.org/pub/scm/linux/kernel/git...
[thirdparty/linux.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/dma-resv.h>
10 #include <linux/idr.h>
11 #include <linux/list.h>
12 #include <linux/miscdevice.h>
13 #include <linux/module.h>
14 #include <linux/of_address.h>
15 #include <linux/of.h>
16 #include <linux/platform_device.h>
17 #include <linux/sort.h>
18 #include <linux/of_platform.h>
19 #include <linux/rpmsg.h>
20 #include <linux/scatterlist.h>
21 #include <linux/slab.h>
22 #include <linux/firmware/qcom/qcom_scm.h>
23 #include <uapi/misc/fastrpc.h>
24 #include <linux/of_reserved_mem.h>
25
26 #define ADSP_DOMAIN_ID (0)
27 #define MDSP_DOMAIN_ID (1)
28 #define SDSP_DOMAIN_ID (2)
29 #define CDSP_DOMAIN_ID (3)
30 #define FASTRPC_DEV_MAX 4 /* adsp, mdsp, slpi, cdsp*/
31 #define FASTRPC_MAX_SESSIONS 14
32 #define FASTRPC_MAX_VMIDS 16
33 #define FASTRPC_ALIGN 128
34 #define FASTRPC_MAX_FDLIST 16
35 #define FASTRPC_MAX_CRCLIST 64
36 #define FASTRPC_PHYS(p) ((p) & 0xffffffff)
37 #define FASTRPC_CTX_MAX (256)
38 #define FASTRPC_INIT_HANDLE 1
39 #define FASTRPC_DSP_UTILITIES_HANDLE 2
40 #define FASTRPC_CTXID_MASK (0xFF0)
41 #define INIT_FILELEN_MAX (2 * 1024 * 1024)
42 #define INIT_FILE_NAMELEN_MAX (128)
43 #define FASTRPC_DEVICE_NAME "fastrpc"
44
45 /* Add memory to static PD pool, protection thru XPU */
46 #define ADSP_MMAP_HEAP_ADDR 4
47 /* MAP static DMA buffer on DSP User PD */
48 #define ADSP_MMAP_DMA_BUFFER 6
49 /* Add memory to static PD pool protection thru hypervisor */
50 #define ADSP_MMAP_REMOTE_HEAP_ADDR 8
51 /* Add memory to userPD pool, for user heap */
52 #define ADSP_MMAP_ADD_PAGES 0x1000
53 /* Add memory to userPD pool, for LLC heap */
54 #define ADSP_MMAP_ADD_PAGES_LLC 0x3000,
55
56 #define DSP_UNSUPPORTED_API (0x80000414)
57 /* MAX NUMBER of DSP ATTRIBUTES SUPPORTED */
58 #define FASTRPC_MAX_DSP_ATTRIBUTES (256)
59 #define FASTRPC_MAX_DSP_ATTRIBUTES_LEN (sizeof(u32) * FASTRPC_MAX_DSP_ATTRIBUTES)
60
61 /* Retrives number of input buffers from the scalars parameter */
62 #define REMOTE_SCALARS_INBUFS(sc) (((sc) >> 16) & 0x0ff)
63
64 /* Retrives number of output buffers from the scalars parameter */
65 #define REMOTE_SCALARS_OUTBUFS(sc) (((sc) >> 8) & 0x0ff)
66
67 /* Retrives number of input handles from the scalars parameter */
68 #define REMOTE_SCALARS_INHANDLES(sc) (((sc) >> 4) & 0x0f)
69
70 /* Retrives number of output handles from the scalars parameter */
71 #define REMOTE_SCALARS_OUTHANDLES(sc) ((sc) & 0x0f)
72
73 #define REMOTE_SCALARS_LENGTH(sc) (REMOTE_SCALARS_INBUFS(sc) + \
74 REMOTE_SCALARS_OUTBUFS(sc) + \
75 REMOTE_SCALARS_INHANDLES(sc)+ \
76 REMOTE_SCALARS_OUTHANDLES(sc))
77 #define FASTRPC_BUILD_SCALARS(attr, method, in, out, oin, oout) \
78 (((attr & 0x07) << 29) | \
79 ((method & 0x1f) << 24) | \
80 ((in & 0xff) << 16) | \
81 ((out & 0xff) << 8) | \
82 ((oin & 0x0f) << 4) | \
83 (oout & 0x0f))
84
85 #define FASTRPC_SCALARS(method, in, out) \
86 FASTRPC_BUILD_SCALARS(0, method, in, out, 0, 0)
87
88 #define FASTRPC_CREATE_PROCESS_NARGS 6
89 #define FASTRPC_CREATE_STATIC_PROCESS_NARGS 3
90 /* Remote Method id table */
91 #define FASTRPC_RMID_INIT_ATTACH 0
92 #define FASTRPC_RMID_INIT_RELEASE 1
93 #define FASTRPC_RMID_INIT_MMAP 4
94 #define FASTRPC_RMID_INIT_MUNMAP 5
95 #define FASTRPC_RMID_INIT_CREATE 6
96 #define FASTRPC_RMID_INIT_CREATE_ATTR 7
97 #define FASTRPC_RMID_INIT_CREATE_STATIC 8
98 #define FASTRPC_RMID_INIT_MEM_MAP 10
99 #define FASTRPC_RMID_INIT_MEM_UNMAP 11
100
101 /* Protection Domain(PD) ids */
102 #define ROOT_PD (0)
103 #define USER_PD (1)
104 #define SENSORS_PD (2)
105
106 #define miscdev_to_fdevice(d) container_of(d, struct fastrpc_device, miscdev)
107
108 static const char *domains[FASTRPC_DEV_MAX] = { "adsp", "mdsp",
109 "sdsp", "cdsp"};
110 struct fastrpc_phy_page {
111 u64 addr; /* physical address */
112 u64 size; /* size of contiguous region */
113 };
114
115 struct fastrpc_invoke_buf {
116 u32 num; /* number of contiguous regions */
117 u32 pgidx; /* index to start of contiguous region */
118 };
119
120 struct fastrpc_remote_dmahandle {
121 s32 fd; /* dma handle fd */
122 u32 offset; /* dma handle offset */
123 u32 len; /* dma handle length */
124 };
125
126 struct fastrpc_remote_buf {
127 u64 pv; /* buffer pointer */
128 u64 len; /* length of buffer */
129 };
130
131 union fastrpc_remote_arg {
132 struct fastrpc_remote_buf buf;
133 struct fastrpc_remote_dmahandle dma;
134 };
135
136 struct fastrpc_mmap_rsp_msg {
137 u64 vaddr;
138 };
139
140 struct fastrpc_mmap_req_msg {
141 s32 pgid;
142 u32 flags;
143 u64 vaddr;
144 s32 num;
145 };
146
147 struct fastrpc_mem_map_req_msg {
148 s32 pgid;
149 s32 fd;
150 s32 offset;
151 u32 flags;
152 u64 vaddrin;
153 s32 num;
154 s32 data_len;
155 };
156
157 struct fastrpc_munmap_req_msg {
158 s32 pgid;
159 u64 vaddr;
160 u64 size;
161 };
162
163 struct fastrpc_mem_unmap_req_msg {
164 s32 pgid;
165 s32 fd;
166 u64 vaddrin;
167 u64 len;
168 };
169
170 struct fastrpc_msg {
171 int pid; /* process group id */
172 int tid; /* thread id */
173 u64 ctx; /* invoke caller context */
174 u32 handle; /* handle to invoke */
175 u32 sc; /* scalars structure describing the data */
176 u64 addr; /* physical address */
177 u64 size; /* size of contiguous region */
178 };
179
180 struct fastrpc_invoke_rsp {
181 u64 ctx; /* invoke caller context */
182 int retval; /* invoke return value */
183 };
184
185 struct fastrpc_buf_overlap {
186 u64 start;
187 u64 end;
188 int raix;
189 u64 mstart;
190 u64 mend;
191 u64 offset;
192 };
193
194 struct fastrpc_buf {
195 struct fastrpc_user *fl;
196 struct dma_buf *dmabuf;
197 struct device *dev;
198 void *virt;
199 u64 phys;
200 u64 size;
201 /* Lock for dma buf attachments */
202 struct mutex lock;
203 struct list_head attachments;
204 /* mmap support */
205 struct list_head node; /* list of user requested mmaps */
206 uintptr_t raddr;
207 };
208
209 struct fastrpc_dma_buf_attachment {
210 struct device *dev;
211 struct sg_table sgt;
212 struct list_head node;
213 };
214
215 struct fastrpc_map {
216 struct list_head node;
217 struct fastrpc_user *fl;
218 int fd;
219 struct dma_buf *buf;
220 struct sg_table *table;
221 struct dma_buf_attachment *attach;
222 u64 phys;
223 u64 size;
224 void *va;
225 u64 len;
226 u64 raddr;
227 u32 attr;
228 struct kref refcount;
229 };
230
231 struct fastrpc_invoke_ctx {
232 int nscalars;
233 int nbufs;
234 int retval;
235 int pid;
236 int tgid;
237 u32 sc;
238 u32 *crc;
239 u64 ctxid;
240 u64 msg_sz;
241 struct kref refcount;
242 struct list_head node; /* list of ctxs */
243 struct completion work;
244 struct work_struct put_work;
245 struct fastrpc_msg msg;
246 struct fastrpc_user *fl;
247 union fastrpc_remote_arg *rpra;
248 struct fastrpc_map **maps;
249 struct fastrpc_buf *buf;
250 struct fastrpc_invoke_args *args;
251 struct fastrpc_buf_overlap *olaps;
252 struct fastrpc_channel_ctx *cctx;
253 };
254
255 struct fastrpc_session_ctx {
256 struct device *dev;
257 int sid;
258 bool used;
259 bool valid;
260 };
261
262 struct fastrpc_channel_ctx {
263 int domain_id;
264 int sesscount;
265 int vmcount;
266 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
285 struct fastrpc_device {
286 struct fastrpc_channel_ctx *cctx;
287 struct miscdevice miscdev;
288 bool secure;
289 };
290
291 struct 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
310 static 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\n",
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
349 static void fastrpc_map_put(struct fastrpc_map *map)
350 {
351 if (map)
352 kref_put(&map->refcount, fastrpc_free_map);
353 }
354
355 static 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
364 static 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
394 static 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
401 static 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
434 static 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
452 static 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
460 static 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
469 static void fastrpc_channel_ctx_get(struct fastrpc_channel_ctx *cctx)
470 {
471 kref_get(&cctx->refcount);
472 }
473
474 static void fastrpc_channel_ctx_put(struct fastrpc_channel_ctx *cctx)
475 {
476 kref_put(&cctx->refcount, fastrpc_channel_ctx_free);
477 }
478
479 static 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
506 static void fastrpc_context_get(struct fastrpc_invoke_ctx *ctx)
507 {
508 kref_get(&ctx->refcount);
509 }
510
511 static void fastrpc_context_put(struct fastrpc_invoke_ctx *ctx)
512 {
513 kref_put(&ctx->refcount, fastrpc_context_free);
514 }
515
516 static 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)
525 static 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
537 static 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
573 static 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;
638 err_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
650 static struct sg_table *
651 fastrpc_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
666 static 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
673 static void fastrpc_release(struct dma_buf *dmabuf)
674 {
675 struct fastrpc_buf *buffer = dmabuf->priv;
676
677 fastrpc_buf_free(buffer);
678 }
679
680 static 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
710 static 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
723 static 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
732 static 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
744 static 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
754 static 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\n",
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
831 map_err:
832 dma_buf_detach(map->buf, map->attach);
833 attach_err:
834 dma_buf_put(map->buf);
835 get_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
868 static 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
881 static 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
902 static 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
924 static 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
929 static 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
934 static 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 if (ctx->fl->sctx->sid)
957 err = fastrpc_buf_alloc(ctx->fl, dev, pkt_size, &ctx->buf);
958 else
959 err = fastrpc_remote_heap_alloc(ctx->fl, dev, pkt_size, &ctx->buf);
960 if (err)
961 return err;
962
963 memset(ctx->buf->virt, 0, pkt_size);
964 rpra = ctx->buf->virt;
965 list = fastrpc_invoke_buf_start(rpra, ctx->nscalars);
966 pages = fastrpc_phy_page_start(list, ctx->nscalars);
967 args = (uintptr_t)ctx->buf->virt + metalen;
968 rlen = pkt_size - metalen;
969 ctx->rpra = rpra;
970
971 for (oix = 0; oix < ctx->nbufs; ++oix) {
972 int mlen;
973
974 i = ctx->olaps[oix].raix;
975 len = ctx->args[i].length;
976
977 rpra[i].buf.pv = 0;
978 rpra[i].buf.len = len;
979 list[i].num = len ? 1 : 0;
980 list[i].pgidx = i;
981
982 if (!len)
983 continue;
984
985 if (ctx->maps[i]) {
986 struct vm_area_struct *vma = NULL;
987
988 rpra[i].buf.pv = (u64) ctx->args[i].ptr;
989 pages[i].addr = ctx->maps[i]->phys;
990
991 mmap_read_lock(current->mm);
992 vma = find_vma(current->mm, ctx->args[i].ptr);
993 if (vma)
994 pages[i].addr += ctx->args[i].ptr -
995 vma->vm_start;
996 mmap_read_unlock(current->mm);
997
998 pg_start = (ctx->args[i].ptr & PAGE_MASK) >> PAGE_SHIFT;
999 pg_end = ((ctx->args[i].ptr + len - 1) & PAGE_MASK) >>
1000 PAGE_SHIFT;
1001 pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE;
1002
1003 } else {
1004
1005 if (ctx->olaps[oix].offset == 0) {
1006 rlen -= ALIGN(args, FASTRPC_ALIGN) - args;
1007 args = ALIGN(args, FASTRPC_ALIGN);
1008 }
1009
1010 mlen = ctx->olaps[oix].mend - ctx->olaps[oix].mstart;
1011
1012 if (rlen < mlen)
1013 goto bail;
1014
1015 rpra[i].buf.pv = args - ctx->olaps[oix].offset;
1016 pages[i].addr = ctx->buf->phys -
1017 ctx->olaps[oix].offset +
1018 (pkt_size - rlen);
1019 pages[i].addr = pages[i].addr & PAGE_MASK;
1020
1021 pg_start = (args & PAGE_MASK) >> PAGE_SHIFT;
1022 pg_end = ((args + len - 1) & PAGE_MASK) >> PAGE_SHIFT;
1023 pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE;
1024 args = args + mlen;
1025 rlen -= mlen;
1026 }
1027
1028 if (i < inbufs && !ctx->maps[i]) {
1029 void *dst = (void *)(uintptr_t)rpra[i].buf.pv;
1030 void *src = (void *)(uintptr_t)ctx->args[i].ptr;
1031
1032 if (!kernel) {
1033 if (copy_from_user(dst, (void __user *)src,
1034 len)) {
1035 err = -EFAULT;
1036 goto bail;
1037 }
1038 } else {
1039 memcpy(dst, src, len);
1040 }
1041 }
1042 }
1043
1044 for (i = ctx->nbufs; i < ctx->nscalars; ++i) {
1045 list[i].num = ctx->args[i].length ? 1 : 0;
1046 list[i].pgidx = i;
1047 if (ctx->maps[i]) {
1048 pages[i].addr = ctx->maps[i]->phys;
1049 pages[i].size = ctx->maps[i]->size;
1050 }
1051 rpra[i].dma.fd = ctx->args[i].fd;
1052 rpra[i].dma.len = ctx->args[i].length;
1053 rpra[i].dma.offset = (u64) ctx->args[i].ptr;
1054 }
1055
1056 bail:
1057 if (err)
1058 dev_err(dev, "Error: get invoke args failed:%d\n", err);
1059
1060 return err;
1061 }
1062
1063 static int fastrpc_put_args(struct fastrpc_invoke_ctx *ctx,
1064 u32 kernel)
1065 {
1066 union fastrpc_remote_arg *rpra = ctx->rpra;
1067 struct fastrpc_user *fl = ctx->fl;
1068 struct fastrpc_map *mmap = NULL;
1069 struct fastrpc_invoke_buf *list;
1070 struct fastrpc_phy_page *pages;
1071 u64 *fdlist;
1072 int i, inbufs, outbufs, handles;
1073
1074 inbufs = REMOTE_SCALARS_INBUFS(ctx->sc);
1075 outbufs = REMOTE_SCALARS_OUTBUFS(ctx->sc);
1076 handles = REMOTE_SCALARS_INHANDLES(ctx->sc) + REMOTE_SCALARS_OUTHANDLES(ctx->sc);
1077 list = fastrpc_invoke_buf_start(rpra, ctx->nscalars);
1078 pages = fastrpc_phy_page_start(list, ctx->nscalars);
1079 fdlist = (uint64_t *)(pages + inbufs + outbufs + handles);
1080
1081 for (i = inbufs; i < ctx->nbufs; ++i) {
1082 if (!ctx->maps[i]) {
1083 void *src = (void *)(uintptr_t)rpra[i].buf.pv;
1084 void *dst = (void *)(uintptr_t)ctx->args[i].ptr;
1085 u64 len = rpra[i].buf.len;
1086
1087 if (!kernel) {
1088 if (copy_to_user((void __user *)dst, src, len))
1089 return -EFAULT;
1090 } else {
1091 memcpy(dst, src, len);
1092 }
1093 }
1094 }
1095
1096 /* Clean up fdlist which is updated by DSP */
1097 for (i = 0; i < FASTRPC_MAX_FDLIST; i++) {
1098 if (!fdlist[i])
1099 break;
1100 if (!fastrpc_map_lookup(fl, (int)fdlist[i], &mmap, false))
1101 fastrpc_map_put(mmap);
1102 }
1103
1104 return 0;
1105 }
1106
1107 static int fastrpc_invoke_send(struct fastrpc_session_ctx *sctx,
1108 struct fastrpc_invoke_ctx *ctx,
1109 u32 kernel, uint32_t handle)
1110 {
1111 struct fastrpc_channel_ctx *cctx;
1112 struct fastrpc_user *fl = ctx->fl;
1113 struct fastrpc_msg *msg = &ctx->msg;
1114 int ret;
1115
1116 cctx = fl->cctx;
1117 msg->pid = fl->tgid;
1118 msg->tid = current->pid;
1119
1120 if (kernel)
1121 msg->pid = 0;
1122
1123 msg->ctx = ctx->ctxid | fl->pd;
1124 msg->handle = handle;
1125 msg->sc = ctx->sc;
1126 msg->addr = ctx->buf ? ctx->buf->phys : 0;
1127 msg->size = roundup(ctx->msg_sz, PAGE_SIZE);
1128 fastrpc_context_get(ctx);
1129
1130 ret = rpmsg_send(cctx->rpdev->ept, (void *)msg, sizeof(*msg));
1131
1132 if (ret)
1133 fastrpc_context_put(ctx);
1134
1135 return ret;
1136
1137 }
1138
1139 static int fastrpc_internal_invoke(struct fastrpc_user *fl, u32 kernel,
1140 u32 handle, u32 sc,
1141 struct fastrpc_invoke_args *args)
1142 {
1143 struct fastrpc_invoke_ctx *ctx = NULL;
1144 struct fastrpc_buf *buf, *b;
1145
1146 int err = 0;
1147
1148 if (!fl->sctx)
1149 return -EINVAL;
1150
1151 if (!fl->cctx->rpdev)
1152 return -EPIPE;
1153
1154 if (handle == FASTRPC_INIT_HANDLE && !kernel) {
1155 dev_warn_ratelimited(fl->sctx->dev, "user app trying to send a kernel RPC message (%d)\n", handle);
1156 return -EPERM;
1157 }
1158
1159 ctx = fastrpc_context_alloc(fl, kernel, sc, args);
1160 if (IS_ERR(ctx))
1161 return PTR_ERR(ctx);
1162
1163 err = fastrpc_get_args(kernel, ctx);
1164 if (err)
1165 goto bail;
1166
1167 /* make sure that all CPU memory writes are seen by DSP */
1168 dma_wmb();
1169 /* Send invoke buffer to remote dsp */
1170 err = fastrpc_invoke_send(fl->sctx, ctx, kernel, handle);
1171 if (err)
1172 goto bail;
1173
1174 if (kernel) {
1175 if (!wait_for_completion_timeout(&ctx->work, 10 * HZ))
1176 err = -ETIMEDOUT;
1177 } else {
1178 err = wait_for_completion_interruptible(&ctx->work);
1179 }
1180
1181 if (err)
1182 goto bail;
1183
1184 /* make sure that all memory writes by DSP are seen by CPU */
1185 dma_rmb();
1186 /* populate all the output buffers with results */
1187 err = fastrpc_put_args(ctx, kernel);
1188 if (err)
1189 goto bail;
1190
1191 /* Check the response from remote dsp */
1192 err = ctx->retval;
1193 if (err)
1194 goto bail;
1195
1196 bail:
1197 if (err != -ERESTARTSYS && err != -ETIMEDOUT) {
1198 /* We are done with this compute context */
1199 spin_lock(&fl->lock);
1200 list_del(&ctx->node);
1201 spin_unlock(&fl->lock);
1202 fastrpc_context_put(ctx);
1203 }
1204
1205 if (err == -ERESTARTSYS) {
1206 list_for_each_entry_safe(buf, b, &fl->mmaps, node) {
1207 list_del(&buf->node);
1208 list_add_tail(&buf->node, &fl->cctx->invoke_interrupted_mmaps);
1209 }
1210 }
1211
1212 if (err)
1213 dev_dbg(fl->sctx->dev, "Error: Invoke Failed %d\n", err);
1214
1215 return err;
1216 }
1217
1218 static bool is_session_rejected(struct fastrpc_user *fl, bool unsigned_pd_request)
1219 {
1220 /* Check if the device node is non-secure and channel is secure*/
1221 if (!fl->is_secure_dev && fl->cctx->secure) {
1222 /*
1223 * Allow untrusted applications to offload only to Unsigned PD when
1224 * channel is configured as secure and block untrusted apps on channel
1225 * that does not support unsigned PD offload
1226 */
1227 if (!fl->cctx->unsigned_support || !unsigned_pd_request) {
1228 dev_err(&fl->cctx->rpdev->dev, "Error: Untrusted application trying to offload to signed PD\n");
1229 return true;
1230 }
1231 }
1232
1233 return false;
1234 }
1235
1236 static int fastrpc_init_create_static_process(struct fastrpc_user *fl,
1237 char __user *argp)
1238 {
1239 struct fastrpc_init_create_static init;
1240 struct fastrpc_invoke_args *args;
1241 struct fastrpc_phy_page pages[1];
1242 char *name;
1243 int err;
1244 bool scm_done = false;
1245 struct {
1246 int pgid;
1247 u32 namelen;
1248 u32 pageslen;
1249 } inbuf;
1250 u32 sc;
1251
1252 args = kcalloc(FASTRPC_CREATE_STATIC_PROCESS_NARGS, sizeof(*args), GFP_KERNEL);
1253 if (!args)
1254 return -ENOMEM;
1255
1256 if (copy_from_user(&init, argp, sizeof(init))) {
1257 err = -EFAULT;
1258 goto err;
1259 }
1260
1261 if (init.namelen > INIT_FILE_NAMELEN_MAX) {
1262 err = -EINVAL;
1263 goto err;
1264 }
1265
1266 name = memdup_user(u64_to_user_ptr(init.name), init.namelen);
1267 if (IS_ERR(name)) {
1268 err = PTR_ERR(name);
1269 goto err;
1270 }
1271
1272 if (!fl->cctx->remote_heap) {
1273 err = fastrpc_remote_heap_alloc(fl, fl->sctx->dev, init.memlen,
1274 &fl->cctx->remote_heap);
1275 if (err)
1276 goto err_name;
1277
1278 /* Map if we have any heap VMIDs associated with this ADSP Static Process. */
1279 if (fl->cctx->vmcount) {
1280 u64 src_perms = BIT(QCOM_SCM_VMID_HLOS);
1281
1282 err = qcom_scm_assign_mem(fl->cctx->remote_heap->phys,
1283 (u64)fl->cctx->remote_heap->size,
1284 &src_perms,
1285 fl->cctx->vmperms, fl->cctx->vmcount);
1286 if (err) {
1287 dev_err(fl->sctx->dev, "Failed to assign memory with phys 0x%llx size 0x%llx err %d\n",
1288 fl->cctx->remote_heap->phys, fl->cctx->remote_heap->size, err);
1289 goto err_map;
1290 }
1291 scm_done = true;
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 kfree(name);
1324
1325 return 0;
1326 err_invoke:
1327 if (fl->cctx->vmcount && scm_done) {
1328 u64 src_perms = 0;
1329 struct qcom_scm_vmperm dst_perms;
1330 u32 i;
1331
1332 for (i = 0; i < fl->cctx->vmcount; i++)
1333 src_perms |= BIT(fl->cctx->vmperms[i].vmid);
1334
1335 dst_perms.vmid = QCOM_SCM_VMID_HLOS;
1336 dst_perms.perm = QCOM_SCM_PERM_RWX;
1337 err = qcom_scm_assign_mem(fl->cctx->remote_heap->phys,
1338 (u64)fl->cctx->remote_heap->size,
1339 &src_perms, &dst_perms, 1);
1340 if (err)
1341 dev_err(fl->sctx->dev, "Failed to assign memory phys 0x%llx size 0x%llx err %d\n",
1342 fl->cctx->remote_heap->phys, fl->cctx->remote_heap->size, err);
1343 }
1344 err_map:
1345 fastrpc_buf_free(fl->cctx->remote_heap);
1346 err_name:
1347 kfree(name);
1348 err:
1349 kfree(args);
1350
1351 return err;
1352 }
1353
1354 static int fastrpc_init_create_process(struct fastrpc_user *fl,
1355 char __user *argp)
1356 {
1357 struct fastrpc_init_create init;
1358 struct fastrpc_invoke_args *args;
1359 struct fastrpc_phy_page pages[1];
1360 struct fastrpc_map *map = NULL;
1361 struct fastrpc_buf *imem = NULL;
1362 int memlen;
1363 int err;
1364 struct {
1365 int pgid;
1366 u32 namelen;
1367 u32 filelen;
1368 u32 pageslen;
1369 u32 attrs;
1370 u32 siglen;
1371 } inbuf;
1372 u32 sc;
1373 bool unsigned_module = false;
1374
1375 args = kcalloc(FASTRPC_CREATE_PROCESS_NARGS, sizeof(*args), GFP_KERNEL);
1376 if (!args)
1377 return -ENOMEM;
1378
1379 if (copy_from_user(&init, argp, sizeof(init))) {
1380 err = -EFAULT;
1381 goto err;
1382 }
1383
1384 if (init.attrs & FASTRPC_MODE_UNSIGNED_MODULE)
1385 unsigned_module = true;
1386
1387 if (is_session_rejected(fl, unsigned_module)) {
1388 err = -ECONNREFUSED;
1389 goto err;
1390 }
1391
1392 if (init.filelen > INIT_FILELEN_MAX) {
1393 err = -EINVAL;
1394 goto err;
1395 }
1396
1397 inbuf.pgid = fl->tgid;
1398 inbuf.namelen = strlen(current->comm) + 1;
1399 inbuf.filelen = init.filelen;
1400 inbuf.pageslen = 1;
1401 inbuf.attrs = init.attrs;
1402 inbuf.siglen = init.siglen;
1403 fl->pd = USER_PD;
1404
1405 if (init.filelen && init.filefd) {
1406 err = fastrpc_map_create(fl, init.filefd, init.filelen, 0, &map);
1407 if (err)
1408 goto err;
1409 }
1410
1411 memlen = ALIGN(max(INIT_FILELEN_MAX, (int)init.filelen * 4),
1412 1024 * 1024);
1413 err = fastrpc_buf_alloc(fl, fl->sctx->dev, memlen,
1414 &imem);
1415 if (err)
1416 goto err_alloc;
1417
1418 fl->init_mem = imem;
1419 args[0].ptr = (u64)(uintptr_t)&inbuf;
1420 args[0].length = sizeof(inbuf);
1421 args[0].fd = -1;
1422
1423 args[1].ptr = (u64)(uintptr_t)current->comm;
1424 args[1].length = inbuf.namelen;
1425 args[1].fd = -1;
1426
1427 args[2].ptr = (u64) init.file;
1428 args[2].length = inbuf.filelen;
1429 args[2].fd = init.filefd;
1430
1431 pages[0].addr = imem->phys;
1432 pages[0].size = imem->size;
1433
1434 args[3].ptr = (u64)(uintptr_t) pages;
1435 args[3].length = 1 * sizeof(*pages);
1436 args[3].fd = -1;
1437
1438 args[4].ptr = (u64)(uintptr_t)&inbuf.attrs;
1439 args[4].length = sizeof(inbuf.attrs);
1440 args[4].fd = -1;
1441
1442 args[5].ptr = (u64)(uintptr_t) &inbuf.siglen;
1443 args[5].length = sizeof(inbuf.siglen);
1444 args[5].fd = -1;
1445
1446 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE, 4, 0);
1447 if (init.attrs)
1448 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE_ATTR, 4, 0);
1449
1450 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE,
1451 sc, args);
1452 if (err)
1453 goto err_invoke;
1454
1455 kfree(args);
1456
1457 return 0;
1458
1459 err_invoke:
1460 fl->init_mem = NULL;
1461 fastrpc_buf_free(imem);
1462 err_alloc:
1463 fastrpc_map_put(map);
1464 err:
1465 kfree(args);
1466
1467 return err;
1468 }
1469
1470 static struct fastrpc_session_ctx *fastrpc_session_alloc(
1471 struct fastrpc_channel_ctx *cctx)
1472 {
1473 struct fastrpc_session_ctx *session = NULL;
1474 unsigned long flags;
1475 int i;
1476
1477 spin_lock_irqsave(&cctx->lock, flags);
1478 for (i = 0; i < cctx->sesscount; i++) {
1479 if (!cctx->session[i].used && cctx->session[i].valid) {
1480 cctx->session[i].used = true;
1481 session = &cctx->session[i];
1482 break;
1483 }
1484 }
1485 spin_unlock_irqrestore(&cctx->lock, flags);
1486
1487 return session;
1488 }
1489
1490 static void fastrpc_session_free(struct fastrpc_channel_ctx *cctx,
1491 struct fastrpc_session_ctx *session)
1492 {
1493 unsigned long flags;
1494
1495 spin_lock_irqsave(&cctx->lock, flags);
1496 session->used = false;
1497 spin_unlock_irqrestore(&cctx->lock, flags);
1498 }
1499
1500 static int fastrpc_release_current_dsp_process(struct fastrpc_user *fl)
1501 {
1502 struct fastrpc_invoke_args args[1];
1503 int tgid = 0;
1504 u32 sc;
1505
1506 tgid = fl->tgid;
1507 args[0].ptr = (u64)(uintptr_t) &tgid;
1508 args[0].length = sizeof(tgid);
1509 args[0].fd = -1;
1510 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_RELEASE, 1, 0);
1511
1512 return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE,
1513 sc, &args[0]);
1514 }
1515
1516 static int fastrpc_device_release(struct inode *inode, struct file *file)
1517 {
1518 struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data;
1519 struct fastrpc_channel_ctx *cctx = fl->cctx;
1520 struct fastrpc_invoke_ctx *ctx, *n;
1521 struct fastrpc_map *map, *m;
1522 struct fastrpc_buf *buf, *b;
1523 unsigned long flags;
1524
1525 fastrpc_release_current_dsp_process(fl);
1526
1527 spin_lock_irqsave(&cctx->lock, flags);
1528 list_del(&fl->user);
1529 spin_unlock_irqrestore(&cctx->lock, flags);
1530
1531 if (fl->init_mem)
1532 fastrpc_buf_free(fl->init_mem);
1533
1534 list_for_each_entry_safe(ctx, n, &fl->pending, node) {
1535 list_del(&ctx->node);
1536 fastrpc_context_put(ctx);
1537 }
1538
1539 list_for_each_entry_safe(map, m, &fl->maps, node)
1540 fastrpc_map_put(map);
1541
1542 list_for_each_entry_safe(buf, b, &fl->mmaps, node) {
1543 list_del(&buf->node);
1544 fastrpc_buf_free(buf);
1545 }
1546
1547 fastrpc_session_free(cctx, fl->sctx);
1548 fastrpc_channel_ctx_put(cctx);
1549
1550 mutex_destroy(&fl->mutex);
1551 kfree(fl);
1552 file->private_data = NULL;
1553
1554 return 0;
1555 }
1556
1557 static int fastrpc_device_open(struct inode *inode, struct file *filp)
1558 {
1559 struct fastrpc_channel_ctx *cctx;
1560 struct fastrpc_device *fdevice;
1561 struct fastrpc_user *fl = NULL;
1562 unsigned long flags;
1563
1564 fdevice = miscdev_to_fdevice(filp->private_data);
1565 cctx = fdevice->cctx;
1566
1567 fl = kzalloc(sizeof(*fl), GFP_KERNEL);
1568 if (!fl)
1569 return -ENOMEM;
1570
1571 /* Released in fastrpc_device_release() */
1572 fastrpc_channel_ctx_get(cctx);
1573
1574 filp->private_data = fl;
1575 spin_lock_init(&fl->lock);
1576 mutex_init(&fl->mutex);
1577 INIT_LIST_HEAD(&fl->pending);
1578 INIT_LIST_HEAD(&fl->maps);
1579 INIT_LIST_HEAD(&fl->mmaps);
1580 INIT_LIST_HEAD(&fl->user);
1581 fl->tgid = current->tgid;
1582 fl->cctx = cctx;
1583 fl->is_secure_dev = fdevice->secure;
1584
1585 fl->sctx = fastrpc_session_alloc(cctx);
1586 if (!fl->sctx) {
1587 dev_err(&cctx->rpdev->dev, "No session available\n");
1588 mutex_destroy(&fl->mutex);
1589 kfree(fl);
1590
1591 return -EBUSY;
1592 }
1593
1594 spin_lock_irqsave(&cctx->lock, flags);
1595 list_add_tail(&fl->user, &cctx->users);
1596 spin_unlock_irqrestore(&cctx->lock, flags);
1597
1598 return 0;
1599 }
1600
1601 static int fastrpc_dmabuf_alloc(struct fastrpc_user *fl, char __user *argp)
1602 {
1603 struct fastrpc_alloc_dma_buf bp;
1604 DEFINE_DMA_BUF_EXPORT_INFO(exp_info);
1605 struct fastrpc_buf *buf = NULL;
1606 int err;
1607
1608 if (copy_from_user(&bp, argp, sizeof(bp)))
1609 return -EFAULT;
1610
1611 err = fastrpc_buf_alloc(fl, fl->sctx->dev, bp.size, &buf);
1612 if (err)
1613 return err;
1614 exp_info.ops = &fastrpc_dma_buf_ops;
1615 exp_info.size = bp.size;
1616 exp_info.flags = O_RDWR;
1617 exp_info.priv = buf;
1618 buf->dmabuf = dma_buf_export(&exp_info);
1619 if (IS_ERR(buf->dmabuf)) {
1620 err = PTR_ERR(buf->dmabuf);
1621 fastrpc_buf_free(buf);
1622 return err;
1623 }
1624
1625 bp.fd = dma_buf_fd(buf->dmabuf, O_ACCMODE);
1626 if (bp.fd < 0) {
1627 dma_buf_put(buf->dmabuf);
1628 return -EINVAL;
1629 }
1630
1631 if (copy_to_user(argp, &bp, sizeof(bp))) {
1632 /*
1633 * The usercopy failed, but we can't do much about it, as
1634 * dma_buf_fd() already called fd_install() and made the
1635 * file descriptor accessible for the current process. It
1636 * might already be closed and dmabuf no longer valid when
1637 * we reach this point. Therefore "leak" the fd and rely on
1638 * the process exit path to do any required cleanup.
1639 */
1640 return -EFAULT;
1641 }
1642
1643 return 0;
1644 }
1645
1646 static int fastrpc_init_attach(struct fastrpc_user *fl, int pd)
1647 {
1648 struct fastrpc_invoke_args args[1];
1649 int tgid = fl->tgid;
1650 u32 sc;
1651
1652 args[0].ptr = (u64)(uintptr_t) &tgid;
1653 args[0].length = sizeof(tgid);
1654 args[0].fd = -1;
1655 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_ATTACH, 1, 0);
1656 fl->pd = pd;
1657
1658 return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE,
1659 sc, &args[0]);
1660 }
1661
1662 static int fastrpc_invoke(struct fastrpc_user *fl, char __user *argp)
1663 {
1664 struct fastrpc_invoke_args *args = NULL;
1665 struct fastrpc_invoke inv;
1666 u32 nscalars;
1667 int err;
1668
1669 if (copy_from_user(&inv, argp, sizeof(inv)))
1670 return -EFAULT;
1671
1672 /* nscalars is truncated here to max supported value */
1673 nscalars = REMOTE_SCALARS_LENGTH(inv.sc);
1674 if (nscalars) {
1675 args = kcalloc(nscalars, sizeof(*args), GFP_KERNEL);
1676 if (!args)
1677 return -ENOMEM;
1678
1679 if (copy_from_user(args, (void __user *)(uintptr_t)inv.args,
1680 nscalars * sizeof(*args))) {
1681 kfree(args);
1682 return -EFAULT;
1683 }
1684 }
1685
1686 err = fastrpc_internal_invoke(fl, false, inv.handle, inv.sc, args);
1687 kfree(args);
1688
1689 return err;
1690 }
1691
1692 static int fastrpc_get_info_from_dsp(struct fastrpc_user *fl, uint32_t *dsp_attr_buf,
1693 uint32_t dsp_attr_buf_len)
1694 {
1695 struct fastrpc_invoke_args args[2] = { 0 };
1696
1697 /*
1698 * Capability filled in userspace. This carries the information
1699 * about the remoteproc support which is fetched from the remoteproc
1700 * sysfs node by userspace.
1701 */
1702 dsp_attr_buf[0] = 0;
1703 dsp_attr_buf_len -= 1;
1704
1705 args[0].ptr = (u64)(uintptr_t)&dsp_attr_buf_len;
1706 args[0].length = sizeof(dsp_attr_buf_len);
1707 args[0].fd = -1;
1708 args[1].ptr = (u64)(uintptr_t)&dsp_attr_buf[1];
1709 args[1].length = dsp_attr_buf_len * sizeof(u32);
1710 args[1].fd = -1;
1711
1712 return fastrpc_internal_invoke(fl, true, FASTRPC_DSP_UTILITIES_HANDLE,
1713 FASTRPC_SCALARS(0, 1, 1), args);
1714 }
1715
1716 static int fastrpc_get_info_from_kernel(struct fastrpc_ioctl_capability *cap,
1717 struct fastrpc_user *fl)
1718 {
1719 struct fastrpc_channel_ctx *cctx = fl->cctx;
1720 uint32_t attribute_id = cap->attribute_id;
1721 uint32_t *dsp_attributes;
1722 unsigned long flags;
1723 uint32_t domain = cap->domain;
1724 int err;
1725
1726 spin_lock_irqsave(&cctx->lock, flags);
1727 /* check if we already have queried dsp for attributes */
1728 if (cctx->valid_attributes) {
1729 spin_unlock_irqrestore(&cctx->lock, flags);
1730 goto done;
1731 }
1732 spin_unlock_irqrestore(&cctx->lock, flags);
1733
1734 dsp_attributes = kzalloc(FASTRPC_MAX_DSP_ATTRIBUTES_LEN, GFP_KERNEL);
1735 if (!dsp_attributes)
1736 return -ENOMEM;
1737
1738 err = fastrpc_get_info_from_dsp(fl, dsp_attributes, FASTRPC_MAX_DSP_ATTRIBUTES);
1739 if (err == DSP_UNSUPPORTED_API) {
1740 dev_info(&cctx->rpdev->dev,
1741 "Warning: DSP capabilities not supported on domain: %d\n", domain);
1742 kfree(dsp_attributes);
1743 return -EOPNOTSUPP;
1744 } else if (err) {
1745 dev_err(&cctx->rpdev->dev, "Error: dsp information is incorrect err: %d\n", err);
1746 kfree(dsp_attributes);
1747 return err;
1748 }
1749
1750 spin_lock_irqsave(&cctx->lock, flags);
1751 memcpy(cctx->dsp_attributes, dsp_attributes, FASTRPC_MAX_DSP_ATTRIBUTES_LEN);
1752 cctx->valid_attributes = true;
1753 spin_unlock_irqrestore(&cctx->lock, flags);
1754 kfree(dsp_attributes);
1755 done:
1756 cap->capability = cctx->dsp_attributes[attribute_id];
1757 return 0;
1758 }
1759
1760 static int fastrpc_get_dsp_info(struct fastrpc_user *fl, char __user *argp)
1761 {
1762 struct fastrpc_ioctl_capability cap = {0};
1763 int err = 0;
1764
1765 if (copy_from_user(&cap, argp, sizeof(cap)))
1766 return -EFAULT;
1767
1768 cap.capability = 0;
1769 if (cap.domain >= FASTRPC_DEV_MAX) {
1770 dev_err(&fl->cctx->rpdev->dev, "Error: Invalid domain id:%d, err:%d\n",
1771 cap.domain, err);
1772 return -ECHRNG;
1773 }
1774
1775 /* Fastrpc Capablities does not support modem domain */
1776 if (cap.domain == MDSP_DOMAIN_ID) {
1777 dev_err(&fl->cctx->rpdev->dev, "Error: modem not supported %d\n", err);
1778 return -ECHRNG;
1779 }
1780
1781 if (cap.attribute_id >= FASTRPC_MAX_DSP_ATTRIBUTES) {
1782 dev_err(&fl->cctx->rpdev->dev, "Error: invalid attribute: %d, err: %d\n",
1783 cap.attribute_id, err);
1784 return -EOVERFLOW;
1785 }
1786
1787 err = fastrpc_get_info_from_kernel(&cap, fl);
1788 if (err)
1789 return err;
1790
1791 if (copy_to_user(argp, &cap, sizeof(cap)))
1792 return -EFAULT;
1793
1794 return 0;
1795 }
1796
1797 static int fastrpc_req_munmap_impl(struct fastrpc_user *fl, struct fastrpc_buf *buf)
1798 {
1799 struct fastrpc_invoke_args args[1] = { [0] = { 0 } };
1800 struct fastrpc_munmap_req_msg req_msg;
1801 struct device *dev = fl->sctx->dev;
1802 int err;
1803 u32 sc;
1804
1805 req_msg.pgid = fl->tgid;
1806 req_msg.size = buf->size;
1807 req_msg.vaddr = buf->raddr;
1808
1809 args[0].ptr = (u64) (uintptr_t) &req_msg;
1810 args[0].length = sizeof(req_msg);
1811
1812 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MUNMAP, 1, 0);
1813 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc,
1814 &args[0]);
1815 if (!err) {
1816 dev_dbg(dev, "unmmap\tpt 0x%09lx OK\n", buf->raddr);
1817 spin_lock(&fl->lock);
1818 list_del(&buf->node);
1819 spin_unlock(&fl->lock);
1820 fastrpc_buf_free(buf);
1821 } else {
1822 dev_err(dev, "unmmap\tpt 0x%09lx ERROR\n", buf->raddr);
1823 }
1824
1825 return err;
1826 }
1827
1828 static int fastrpc_req_munmap(struct fastrpc_user *fl, char __user *argp)
1829 {
1830 struct fastrpc_buf *buf = NULL, *iter, *b;
1831 struct fastrpc_req_munmap req;
1832 struct device *dev = fl->sctx->dev;
1833
1834 if (copy_from_user(&req, argp, sizeof(req)))
1835 return -EFAULT;
1836
1837 spin_lock(&fl->lock);
1838 list_for_each_entry_safe(iter, b, &fl->mmaps, node) {
1839 if ((iter->raddr == req.vaddrout) && (iter->size == req.size)) {
1840 buf = iter;
1841 break;
1842 }
1843 }
1844 spin_unlock(&fl->lock);
1845
1846 if (!buf) {
1847 dev_err(dev, "mmap\t\tpt 0x%09llx [len 0x%08llx] not in list\n",
1848 req.vaddrout, req.size);
1849 return -EINVAL;
1850 }
1851
1852 return fastrpc_req_munmap_impl(fl, buf);
1853 }
1854
1855 static int fastrpc_req_mmap(struct fastrpc_user *fl, char __user *argp)
1856 {
1857 struct fastrpc_invoke_args args[3] = { [0 ... 2] = { 0 } };
1858 struct fastrpc_buf *buf = NULL;
1859 struct fastrpc_mmap_req_msg req_msg;
1860 struct fastrpc_mmap_rsp_msg rsp_msg;
1861 struct fastrpc_phy_page pages;
1862 struct fastrpc_req_mmap req;
1863 struct device *dev = fl->sctx->dev;
1864 int err;
1865 u32 sc;
1866
1867 if (copy_from_user(&req, argp, sizeof(req)))
1868 return -EFAULT;
1869
1870 if (req.flags != ADSP_MMAP_ADD_PAGES && req.flags != ADSP_MMAP_REMOTE_HEAP_ADDR) {
1871 dev_err(dev, "flag not supported 0x%x\n", req.flags);
1872
1873 return -EINVAL;
1874 }
1875
1876 if (req.vaddrin) {
1877 dev_err(dev, "adding user allocated pages is not supported\n");
1878 return -EINVAL;
1879 }
1880
1881 if (req.flags == ADSP_MMAP_REMOTE_HEAP_ADDR)
1882 err = fastrpc_remote_heap_alloc(fl, dev, req.size, &buf);
1883 else
1884 err = fastrpc_buf_alloc(fl, dev, req.size, &buf);
1885
1886 if (err) {
1887 dev_err(dev, "failed to allocate buffer\n");
1888 return err;
1889 }
1890
1891 req_msg.pgid = fl->tgid;
1892 req_msg.flags = req.flags;
1893 req_msg.vaddr = req.vaddrin;
1894 req_msg.num = sizeof(pages);
1895
1896 args[0].ptr = (u64) (uintptr_t) &req_msg;
1897 args[0].length = sizeof(req_msg);
1898
1899 pages.addr = buf->phys;
1900 pages.size = buf->size;
1901
1902 args[1].ptr = (u64) (uintptr_t) &pages;
1903 args[1].length = sizeof(pages);
1904
1905 args[2].ptr = (u64) (uintptr_t) &rsp_msg;
1906 args[2].length = sizeof(rsp_msg);
1907
1908 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MMAP, 2, 1);
1909 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc,
1910 &args[0]);
1911 if (err) {
1912 dev_err(dev, "mmap error (len 0x%08llx)\n", buf->size);
1913 fastrpc_buf_free(buf);
1914 return err;
1915 }
1916
1917 /* update the buffer to be able to deallocate the memory on the DSP */
1918 buf->raddr = (uintptr_t) rsp_msg.vaddr;
1919
1920 /* let the client know the address to use */
1921 req.vaddrout = rsp_msg.vaddr;
1922
1923 /* Add memory to static PD pool, protection thru hypervisor */
1924 if (req.flags == ADSP_MMAP_REMOTE_HEAP_ADDR && fl->cctx->vmcount) {
1925 u64 src_perms = BIT(QCOM_SCM_VMID_HLOS);
1926
1927 err = qcom_scm_assign_mem(buf->phys, (u64)buf->size,
1928 &src_perms, fl->cctx->vmperms, fl->cctx->vmcount);
1929 if (err) {
1930 dev_err(fl->sctx->dev, "Failed to assign memory phys 0x%llx size 0x%llx err %d",
1931 buf->phys, buf->size, err);
1932 goto err_assign;
1933 }
1934 }
1935
1936 spin_lock(&fl->lock);
1937 list_add_tail(&buf->node, &fl->mmaps);
1938 spin_unlock(&fl->lock);
1939
1940 if (copy_to_user((void __user *)argp, &req, sizeof(req))) {
1941 err = -EFAULT;
1942 goto err_assign;
1943 }
1944
1945 dev_dbg(dev, "mmap\t\tpt 0x%09lx OK [len 0x%08llx]\n",
1946 buf->raddr, buf->size);
1947
1948 return 0;
1949
1950 err_assign:
1951 fastrpc_req_munmap_impl(fl, buf);
1952
1953 return err;
1954 }
1955
1956 static int fastrpc_req_mem_unmap_impl(struct fastrpc_user *fl, struct fastrpc_mem_unmap *req)
1957 {
1958 struct fastrpc_invoke_args args[1] = { [0] = { 0 } };
1959 struct fastrpc_map *map = NULL, *iter, *m;
1960 struct fastrpc_mem_unmap_req_msg req_msg = { 0 };
1961 int err = 0;
1962 u32 sc;
1963 struct device *dev = fl->sctx->dev;
1964
1965 spin_lock(&fl->lock);
1966 list_for_each_entry_safe(iter, m, &fl->maps, node) {
1967 if ((req->fd < 0 || iter->fd == req->fd) && (iter->raddr == req->vaddr)) {
1968 map = iter;
1969 break;
1970 }
1971 }
1972
1973 spin_unlock(&fl->lock);
1974
1975 if (!map) {
1976 dev_err(dev, "map not in list\n");
1977 return -EINVAL;
1978 }
1979
1980 req_msg.pgid = fl->tgid;
1981 req_msg.len = map->len;
1982 req_msg.vaddrin = map->raddr;
1983 req_msg.fd = map->fd;
1984
1985 args[0].ptr = (u64) (uintptr_t) &req_msg;
1986 args[0].length = sizeof(req_msg);
1987
1988 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MEM_UNMAP, 1, 0);
1989 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc,
1990 &args[0]);
1991 if (err) {
1992 dev_err(dev, "unmmap\tpt fd = %d, 0x%09llx error\n", map->fd, map->raddr);
1993 return err;
1994 }
1995 fastrpc_map_put(map);
1996
1997 return 0;
1998 }
1999
2000 static int fastrpc_req_mem_unmap(struct fastrpc_user *fl, char __user *argp)
2001 {
2002 struct fastrpc_mem_unmap req;
2003
2004 if (copy_from_user(&req, argp, sizeof(req)))
2005 return -EFAULT;
2006
2007 return fastrpc_req_mem_unmap_impl(fl, &req);
2008 }
2009
2010 static int fastrpc_req_mem_map(struct fastrpc_user *fl, char __user *argp)
2011 {
2012 struct fastrpc_invoke_args args[4] = { [0 ... 3] = { 0 } };
2013 struct fastrpc_mem_map_req_msg req_msg = { 0 };
2014 struct fastrpc_mmap_rsp_msg rsp_msg = { 0 };
2015 struct fastrpc_mem_unmap req_unmap = { 0 };
2016 struct fastrpc_phy_page pages = { 0 };
2017 struct fastrpc_mem_map req;
2018 struct device *dev = fl->sctx->dev;
2019 struct fastrpc_map *map = NULL;
2020 int err;
2021 u32 sc;
2022
2023 if (copy_from_user(&req, argp, sizeof(req)))
2024 return -EFAULT;
2025
2026 /* create SMMU mapping */
2027 err = fastrpc_map_create(fl, req.fd, req.length, 0, &map);
2028 if (err) {
2029 dev_err(dev, "failed to map buffer, fd = %d\n", req.fd);
2030 return err;
2031 }
2032
2033 req_msg.pgid = fl->tgid;
2034 req_msg.fd = req.fd;
2035 req_msg.offset = req.offset;
2036 req_msg.vaddrin = req.vaddrin;
2037 map->va = (void *) (uintptr_t) req.vaddrin;
2038 req_msg.flags = req.flags;
2039 req_msg.num = sizeof(pages);
2040 req_msg.data_len = 0;
2041
2042 args[0].ptr = (u64) (uintptr_t) &req_msg;
2043 args[0].length = sizeof(req_msg);
2044
2045 pages.addr = map->phys;
2046 pages.size = map->size;
2047
2048 args[1].ptr = (u64) (uintptr_t) &pages;
2049 args[1].length = sizeof(pages);
2050
2051 args[2].ptr = (u64) (uintptr_t) &pages;
2052 args[2].length = 0;
2053
2054 args[3].ptr = (u64) (uintptr_t) &rsp_msg;
2055 args[3].length = sizeof(rsp_msg);
2056
2057 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MEM_MAP, 3, 1);
2058 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, &args[0]);
2059 if (err) {
2060 dev_err(dev, "mem mmap error, fd %d, vaddr %llx, size %lld\n",
2061 req.fd, req.vaddrin, map->size);
2062 goto err_invoke;
2063 }
2064
2065 /* update the buffer to be able to deallocate the memory on the DSP */
2066 map->raddr = rsp_msg.vaddr;
2067
2068 /* let the client know the address to use */
2069 req.vaddrout = rsp_msg.vaddr;
2070
2071 if (copy_to_user((void __user *)argp, &req, sizeof(req))) {
2072 /* unmap the memory and release the buffer */
2073 req_unmap.vaddr = (uintptr_t) rsp_msg.vaddr;
2074 req_unmap.length = map->size;
2075 fastrpc_req_mem_unmap_impl(fl, &req_unmap);
2076 return -EFAULT;
2077 }
2078
2079 return 0;
2080
2081 err_invoke:
2082 fastrpc_map_put(map);
2083
2084 return err;
2085 }
2086
2087 static long fastrpc_device_ioctl(struct file *file, unsigned int cmd,
2088 unsigned long arg)
2089 {
2090 struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data;
2091 char __user *argp = (char __user *)arg;
2092 int err;
2093
2094 switch (cmd) {
2095 case FASTRPC_IOCTL_INVOKE:
2096 err = fastrpc_invoke(fl, argp);
2097 break;
2098 case FASTRPC_IOCTL_INIT_ATTACH:
2099 err = fastrpc_init_attach(fl, ROOT_PD);
2100 break;
2101 case FASTRPC_IOCTL_INIT_ATTACH_SNS:
2102 err = fastrpc_init_attach(fl, SENSORS_PD);
2103 break;
2104 case FASTRPC_IOCTL_INIT_CREATE_STATIC:
2105 err = fastrpc_init_create_static_process(fl, argp);
2106 break;
2107 case FASTRPC_IOCTL_INIT_CREATE:
2108 err = fastrpc_init_create_process(fl, argp);
2109 break;
2110 case FASTRPC_IOCTL_ALLOC_DMA_BUFF:
2111 err = fastrpc_dmabuf_alloc(fl, argp);
2112 break;
2113 case FASTRPC_IOCTL_MMAP:
2114 err = fastrpc_req_mmap(fl, argp);
2115 break;
2116 case FASTRPC_IOCTL_MUNMAP:
2117 err = fastrpc_req_munmap(fl, argp);
2118 break;
2119 case FASTRPC_IOCTL_MEM_MAP:
2120 err = fastrpc_req_mem_map(fl, argp);
2121 break;
2122 case FASTRPC_IOCTL_MEM_UNMAP:
2123 err = fastrpc_req_mem_unmap(fl, argp);
2124 break;
2125 case FASTRPC_IOCTL_GET_DSP_INFO:
2126 err = fastrpc_get_dsp_info(fl, argp);
2127 break;
2128 default:
2129 err = -ENOTTY;
2130 break;
2131 }
2132
2133 return err;
2134 }
2135
2136 static const struct file_operations fastrpc_fops = {
2137 .open = fastrpc_device_open,
2138 .release = fastrpc_device_release,
2139 .unlocked_ioctl = fastrpc_device_ioctl,
2140 .compat_ioctl = fastrpc_device_ioctl,
2141 };
2142
2143 static int fastrpc_cb_probe(struct platform_device *pdev)
2144 {
2145 struct fastrpc_channel_ctx *cctx;
2146 struct fastrpc_session_ctx *sess;
2147 struct device *dev = &pdev->dev;
2148 int i, sessions = 0;
2149 unsigned long flags;
2150 int rc;
2151
2152 cctx = dev_get_drvdata(dev->parent);
2153 if (!cctx)
2154 return -EINVAL;
2155
2156 of_property_read_u32(dev->of_node, "qcom,nsessions", &sessions);
2157
2158 spin_lock_irqsave(&cctx->lock, flags);
2159 if (cctx->sesscount >= FASTRPC_MAX_SESSIONS) {
2160 dev_err(&pdev->dev, "too many sessions\n");
2161 spin_unlock_irqrestore(&cctx->lock, flags);
2162 return -ENOSPC;
2163 }
2164 sess = &cctx->session[cctx->sesscount++];
2165 sess->used = false;
2166 sess->valid = true;
2167 sess->dev = dev;
2168 dev_set_drvdata(dev, sess);
2169
2170 if (of_property_read_u32(dev->of_node, "reg", &sess->sid))
2171 dev_info(dev, "FastRPC Session ID not specified in DT\n");
2172
2173 if (sessions > 0) {
2174 struct fastrpc_session_ctx *dup_sess;
2175
2176 for (i = 1; i < sessions; i++) {
2177 if (cctx->sesscount >= FASTRPC_MAX_SESSIONS)
2178 break;
2179 dup_sess = &cctx->session[cctx->sesscount++];
2180 memcpy(dup_sess, sess, sizeof(*dup_sess));
2181 }
2182 }
2183 spin_unlock_irqrestore(&cctx->lock, flags);
2184 rc = dma_set_mask(dev, DMA_BIT_MASK(32));
2185 if (rc) {
2186 dev_err(dev, "32-bit DMA enable failed\n");
2187 return rc;
2188 }
2189
2190 return 0;
2191 }
2192
2193 static void fastrpc_cb_remove(struct platform_device *pdev)
2194 {
2195 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(pdev->dev.parent);
2196 struct fastrpc_session_ctx *sess = dev_get_drvdata(&pdev->dev);
2197 unsigned long flags;
2198 int i;
2199
2200 spin_lock_irqsave(&cctx->lock, flags);
2201 for (i = 0; i < FASTRPC_MAX_SESSIONS; i++) {
2202 if (cctx->session[i].sid == sess->sid) {
2203 cctx->session[i].valid = false;
2204 cctx->sesscount--;
2205 }
2206 }
2207 spin_unlock_irqrestore(&cctx->lock, flags);
2208 }
2209
2210 static const struct of_device_id fastrpc_match_table[] = {
2211 { .compatible = "qcom,fastrpc-compute-cb", },
2212 {}
2213 };
2214
2215 static struct platform_driver fastrpc_cb_driver = {
2216 .probe = fastrpc_cb_probe,
2217 .remove_new = fastrpc_cb_remove,
2218 .driver = {
2219 .name = "qcom,fastrpc-cb",
2220 .of_match_table = fastrpc_match_table,
2221 .suppress_bind_attrs = true,
2222 },
2223 };
2224
2225 static int fastrpc_device_register(struct device *dev, struct fastrpc_channel_ctx *cctx,
2226 bool is_secured, const char *domain)
2227 {
2228 struct fastrpc_device *fdev;
2229 int err;
2230
2231 fdev = devm_kzalloc(dev, sizeof(*fdev), GFP_KERNEL);
2232 if (!fdev)
2233 return -ENOMEM;
2234
2235 fdev->secure = is_secured;
2236 fdev->cctx = cctx;
2237 fdev->miscdev.minor = MISC_DYNAMIC_MINOR;
2238 fdev->miscdev.fops = &fastrpc_fops;
2239 fdev->miscdev.name = devm_kasprintf(dev, GFP_KERNEL, "fastrpc-%s%s",
2240 domain, is_secured ? "-secure" : "");
2241 if (!fdev->miscdev.name)
2242 return -ENOMEM;
2243
2244 err = misc_register(&fdev->miscdev);
2245 if (!err) {
2246 if (is_secured)
2247 cctx->secure_fdevice = fdev;
2248 else
2249 cctx->fdevice = fdev;
2250 }
2251
2252 return err;
2253 }
2254
2255 static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev)
2256 {
2257 struct device *rdev = &rpdev->dev;
2258 struct fastrpc_channel_ctx *data;
2259 int i, err, domain_id = -1, vmcount;
2260 const char *domain;
2261 bool secure_dsp;
2262 struct device_node *rmem_node;
2263 struct reserved_mem *rmem;
2264 unsigned int vmids[FASTRPC_MAX_VMIDS];
2265
2266 err = of_property_read_string(rdev->of_node, "label", &domain);
2267 if (err) {
2268 dev_info(rdev, "FastRPC Domain not specified in DT\n");
2269 return err;
2270 }
2271
2272 for (i = 0; i <= CDSP_DOMAIN_ID; i++) {
2273 if (!strcmp(domains[i], domain)) {
2274 domain_id = i;
2275 break;
2276 }
2277 }
2278
2279 if (domain_id < 0) {
2280 dev_info(rdev, "FastRPC Invalid Domain ID %d\n", domain_id);
2281 return -EINVAL;
2282 }
2283
2284 if (of_reserved_mem_device_init_by_idx(rdev, rdev->of_node, 0))
2285 dev_info(rdev, "no reserved DMA memory for FASTRPC\n");
2286
2287 vmcount = of_property_read_variable_u32_array(rdev->of_node,
2288 "qcom,vmids", &vmids[0], 0, FASTRPC_MAX_VMIDS);
2289 if (vmcount < 0)
2290 vmcount = 0;
2291 else if (!qcom_scm_is_available())
2292 return -EPROBE_DEFER;
2293
2294 data = kzalloc(sizeof(*data), GFP_KERNEL);
2295 if (!data)
2296 return -ENOMEM;
2297
2298 if (vmcount) {
2299 data->vmcount = vmcount;
2300 for (i = 0; i < data->vmcount; i++) {
2301 data->vmperms[i].vmid = vmids[i];
2302 data->vmperms[i].perm = QCOM_SCM_PERM_RWX;
2303 }
2304 }
2305
2306 rmem_node = of_parse_phandle(rdev->of_node, "memory-region", 0);
2307 if (domain_id == SDSP_DOMAIN_ID && rmem_node) {
2308 u64 src_perms;
2309
2310 rmem = of_reserved_mem_lookup(rmem_node);
2311 if (!rmem) {
2312 err = -EINVAL;
2313 goto fdev_error;
2314 }
2315
2316 src_perms = BIT(QCOM_SCM_VMID_HLOS);
2317
2318 qcom_scm_assign_mem(rmem->base, rmem->size, &src_perms,
2319 data->vmperms, data->vmcount);
2320
2321 }
2322
2323 secure_dsp = !(of_property_read_bool(rdev->of_node, "qcom,non-secure-domain"));
2324 data->secure = secure_dsp;
2325
2326 switch (domain_id) {
2327 case ADSP_DOMAIN_ID:
2328 case MDSP_DOMAIN_ID:
2329 case SDSP_DOMAIN_ID:
2330 /* Unsigned PD offloading is only supported on CDSP*/
2331 data->unsigned_support = false;
2332 err = fastrpc_device_register(rdev, data, secure_dsp, domains[domain_id]);
2333 if (err)
2334 goto fdev_error;
2335 break;
2336 case CDSP_DOMAIN_ID:
2337 data->unsigned_support = true;
2338 /* Create both device nodes so that we can allow both Signed and Unsigned PD */
2339 err = fastrpc_device_register(rdev, data, true, domains[domain_id]);
2340 if (err)
2341 goto fdev_error;
2342
2343 err = fastrpc_device_register(rdev, data, false, domains[domain_id]);
2344 if (err)
2345 goto fdev_error;
2346 break;
2347 default:
2348 err = -EINVAL;
2349 goto fdev_error;
2350 }
2351
2352 kref_init(&data->refcount);
2353
2354 dev_set_drvdata(&rpdev->dev, data);
2355 rdev->dma_mask = &data->dma_mask;
2356 dma_set_mask_and_coherent(rdev, DMA_BIT_MASK(32));
2357 INIT_LIST_HEAD(&data->users);
2358 INIT_LIST_HEAD(&data->invoke_interrupted_mmaps);
2359 spin_lock_init(&data->lock);
2360 idr_init(&data->ctx_idr);
2361 data->domain_id = domain_id;
2362 data->rpdev = rpdev;
2363
2364 err = of_platform_populate(rdev->of_node, NULL, NULL, rdev);
2365 if (err)
2366 goto populate_error;
2367
2368 return 0;
2369
2370 populate_error:
2371 if (data->fdevice)
2372 misc_deregister(&data->fdevice->miscdev);
2373 if (data->secure_fdevice)
2374 misc_deregister(&data->secure_fdevice->miscdev);
2375
2376 fdev_error:
2377 kfree(data);
2378 return err;
2379 }
2380
2381 static void fastrpc_notify_users(struct fastrpc_user *user)
2382 {
2383 struct fastrpc_invoke_ctx *ctx;
2384
2385 spin_lock(&user->lock);
2386 list_for_each_entry(ctx, &user->pending, node) {
2387 ctx->retval = -EPIPE;
2388 complete(&ctx->work);
2389 }
2390 spin_unlock(&user->lock);
2391 }
2392
2393 static void fastrpc_rpmsg_remove(struct rpmsg_device *rpdev)
2394 {
2395 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev);
2396 struct fastrpc_buf *buf, *b;
2397 struct fastrpc_user *user;
2398 unsigned long flags;
2399
2400 /* No invocations past this point */
2401 spin_lock_irqsave(&cctx->lock, flags);
2402 cctx->rpdev = NULL;
2403 list_for_each_entry(user, &cctx->users, user)
2404 fastrpc_notify_users(user);
2405 spin_unlock_irqrestore(&cctx->lock, flags);
2406
2407 if (cctx->fdevice)
2408 misc_deregister(&cctx->fdevice->miscdev);
2409
2410 if (cctx->secure_fdevice)
2411 misc_deregister(&cctx->secure_fdevice->miscdev);
2412
2413 list_for_each_entry_safe(buf, b, &cctx->invoke_interrupted_mmaps, node)
2414 list_del(&buf->node);
2415
2416 if (cctx->remote_heap)
2417 fastrpc_buf_free(cctx->remote_heap);
2418
2419 of_platform_depopulate(&rpdev->dev);
2420
2421 fastrpc_channel_ctx_put(cctx);
2422 }
2423
2424 static int fastrpc_rpmsg_callback(struct rpmsg_device *rpdev, void *data,
2425 int len, void *priv, u32 addr)
2426 {
2427 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev);
2428 struct fastrpc_invoke_rsp *rsp = data;
2429 struct fastrpc_invoke_ctx *ctx;
2430 unsigned long flags;
2431 unsigned long ctxid;
2432
2433 if (len < sizeof(*rsp))
2434 return -EINVAL;
2435
2436 ctxid = ((rsp->ctx & FASTRPC_CTXID_MASK) >> 4);
2437
2438 spin_lock_irqsave(&cctx->lock, flags);
2439 ctx = idr_find(&cctx->ctx_idr, ctxid);
2440 spin_unlock_irqrestore(&cctx->lock, flags);
2441
2442 if (!ctx) {
2443 dev_err(&rpdev->dev, "No context ID matches response\n");
2444 return -ENOENT;
2445 }
2446
2447 ctx->retval = rsp->retval;
2448 complete(&ctx->work);
2449
2450 /*
2451 * The DMA buffer associated with the context cannot be freed in
2452 * interrupt context so schedule it through a worker thread to
2453 * avoid a kernel BUG.
2454 */
2455 schedule_work(&ctx->put_work);
2456
2457 return 0;
2458 }
2459
2460 static const struct of_device_id fastrpc_rpmsg_of_match[] = {
2461 { .compatible = "qcom,fastrpc" },
2462 { },
2463 };
2464 MODULE_DEVICE_TABLE(of, fastrpc_rpmsg_of_match);
2465
2466 static struct rpmsg_driver fastrpc_driver = {
2467 .probe = fastrpc_rpmsg_probe,
2468 .remove = fastrpc_rpmsg_remove,
2469 .callback = fastrpc_rpmsg_callback,
2470 .drv = {
2471 .name = "qcom,fastrpc",
2472 .of_match_table = fastrpc_rpmsg_of_match,
2473 },
2474 };
2475
2476 static int fastrpc_init(void)
2477 {
2478 int ret;
2479
2480 ret = platform_driver_register(&fastrpc_cb_driver);
2481 if (ret < 0) {
2482 pr_err("fastrpc: failed to register cb driver\n");
2483 return ret;
2484 }
2485
2486 ret = register_rpmsg_driver(&fastrpc_driver);
2487 if (ret < 0) {
2488 pr_err("fastrpc: failed to register rpmsg driver\n");
2489 platform_driver_unregister(&fastrpc_cb_driver);
2490 return ret;
2491 }
2492
2493 return 0;
2494 }
2495 module_init(fastrpc_init);
2496
2497 static void fastrpc_exit(void)
2498 {
2499 platform_driver_unregister(&fastrpc_cb_driver);
2500 unregister_rpmsg_driver(&fastrpc_driver);
2501 }
2502 module_exit(fastrpc_exit);
2503
2504 MODULE_DESCRIPTION("Qualcomm FastRPC");
2505 MODULE_LICENSE("GPL v2");
2506 MODULE_IMPORT_NS(DMA_BUF);
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