Commit | Line | Data |
---|---|---|
f6f9279f SK |
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 | ||
c68cfb71 | 5 | #include <linux/completion.h> |
f6f9279f | 6 | #include <linux/device.h> |
c68cfb71 | 7 | #include <linux/dma-buf.h> |
f6f9279f SK |
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> | |
25e8dfb8 | 15 | #include <linux/sort.h> |
f6f9279f SK |
16 | #include <linux/of_platform.h> |
17 | #include <linux/rpmsg.h> | |
18 | #include <linux/scatterlist.h> | |
19 | #include <linux/slab.h> | |
c68cfb71 | 20 | #include <uapi/misc/fastrpc.h> |
f6f9279f SK |
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*/ | |
c68cfb71 SK |
28 | #define FASTRPC_ALIGN 128 |
29 | #define FASTRPC_MAX_FDLIST 16 | |
30 | #define FASTRPC_MAX_CRCLIST 64 | |
31 | #define FASTRPC_PHYS(p) ((p) & 0xffffffff) | |
f6f9279f | 32 | #define FASTRPC_CTX_MAX (256) |
d73f71c7 | 33 | #define FASTRPC_INIT_HANDLE 1 |
f6f9279f | 34 | #define FASTRPC_CTXID_MASK (0xFF0) |
f1cf11c2 | 35 | #define INIT_FILELEN_MAX (64 * 1024 * 1024) |
d73f71c7 | 36 | #define INIT_MEMLEN_MAX (8 * 1024 * 1024) |
f6f9279f SK |
37 | #define FASTRPC_DEVICE_NAME "fastrpc" |
38 | ||
c68cfb71 SK |
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 | ||
d73f71c7 SK |
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_CREATE 6 | |
71 | #define FASTRPC_RMID_INIT_CREATE_ATTR 7 | |
72 | #define FASTRPC_RMID_INIT_CREATE_STATIC 8 | |
73 | ||
f6f9279f SK |
74 | #define miscdev_to_cctx(d) container_of(d, struct fastrpc_channel_ctx, miscdev) |
75 | ||
76 | static const char *domains[FASTRPC_DEV_MAX] = { "adsp", "mdsp", | |
77 | "sdsp", "cdsp"}; | |
c68cfb71 SK |
78 | struct fastrpc_phy_page { |
79 | u64 addr; /* physical address */ | |
80 | u64 size; /* size of contiguous region */ | |
81 | }; | |
82 | ||
83 | struct fastrpc_invoke_buf { | |
84 | u32 num; /* number of contiguous regions */ | |
85 | u32 pgidx; /* index to start of contiguous region */ | |
86 | }; | |
87 | ||
88 | struct fastrpc_remote_arg { | |
89 | u64 pv; | |
90 | u64 len; | |
91 | }; | |
92 | ||
93 | struct fastrpc_msg { | |
94 | int pid; /* process group id */ | |
95 | int tid; /* thread id */ | |
96 | u64 ctx; /* invoke caller context */ | |
97 | u32 handle; /* handle to invoke */ | |
98 | u32 sc; /* scalars structure describing the data */ | |
99 | u64 addr; /* physical address */ | |
100 | u64 size; /* size of contiguous region */ | |
101 | }; | |
102 | ||
103 | struct fastrpc_invoke_rsp { | |
104 | u64 ctx; /* invoke caller context */ | |
105 | int retval; /* invoke return value */ | |
106 | }; | |
107 | ||
25e8dfb8 SK |
108 | struct fastrpc_buf_overlap { |
109 | u64 start; | |
110 | u64 end; | |
111 | int raix; | |
112 | u64 mstart; | |
113 | u64 mend; | |
114 | u64 offset; | |
115 | }; | |
116 | ||
c68cfb71 SK |
117 | struct fastrpc_buf { |
118 | struct fastrpc_user *fl; | |
6cffd795 | 119 | struct dma_buf *dmabuf; |
c68cfb71 SK |
120 | struct device *dev; |
121 | void *virt; | |
122 | u64 phys; | |
123 | u64 size; | |
6cffd795 SK |
124 | /* Lock for dma buf attachments */ |
125 | struct mutex lock; | |
126 | struct list_head attachments; | |
127 | }; | |
128 | ||
129 | struct fastrpc_dma_buf_attachment { | |
130 | struct device *dev; | |
131 | struct sg_table sgt; | |
132 | struct list_head node; | |
c68cfb71 SK |
133 | }; |
134 | ||
135 | struct fastrpc_map { | |
136 | struct list_head node; | |
137 | struct fastrpc_user *fl; | |
138 | int fd; | |
139 | struct dma_buf *buf; | |
140 | struct sg_table *table; | |
141 | struct dma_buf_attachment *attach; | |
142 | u64 phys; | |
143 | u64 size; | |
144 | void *va; | |
145 | u64 len; | |
146 | struct kref refcount; | |
147 | }; | |
148 | ||
149 | struct fastrpc_invoke_ctx { | |
150 | int nscalars; | |
151 | int nbufs; | |
152 | int retval; | |
153 | int pid; | |
154 | int tgid; | |
155 | u32 sc; | |
156 | u32 *crc; | |
157 | u64 ctxid; | |
158 | u64 msg_sz; | |
159 | struct kref refcount; | |
160 | struct list_head node; /* list of ctxs */ | |
161 | struct completion work; | |
8e7389c7 | 162 | struct work_struct put_work; |
c68cfb71 SK |
163 | struct fastrpc_msg msg; |
164 | struct fastrpc_user *fl; | |
165 | struct fastrpc_remote_arg *rpra; | |
166 | struct fastrpc_map **maps; | |
167 | struct fastrpc_buf *buf; | |
168 | struct fastrpc_invoke_args *args; | |
25e8dfb8 | 169 | struct fastrpc_buf_overlap *olaps; |
c68cfb71 SK |
170 | struct fastrpc_channel_ctx *cctx; |
171 | }; | |
f6f9279f SK |
172 | |
173 | struct fastrpc_session_ctx { | |
174 | struct device *dev; | |
175 | int sid; | |
176 | bool used; | |
177 | bool valid; | |
178 | }; | |
179 | ||
180 | struct fastrpc_channel_ctx { | |
181 | int domain_id; | |
182 | int sesscount; | |
183 | struct rpmsg_device *rpdev; | |
184 | struct fastrpc_session_ctx session[FASTRPC_MAX_SESSIONS]; | |
185 | spinlock_t lock; | |
186 | struct idr ctx_idr; | |
187 | struct list_head users; | |
188 | struct miscdevice miscdev; | |
189 | }; | |
190 | ||
191 | struct fastrpc_user { | |
192 | struct list_head user; | |
193 | struct list_head maps; | |
194 | struct list_head pending; | |
195 | ||
196 | struct fastrpc_channel_ctx *cctx; | |
197 | struct fastrpc_session_ctx *sctx; | |
c68cfb71 | 198 | struct fastrpc_buf *init_mem; |
f6f9279f SK |
199 | |
200 | int tgid; | |
201 | int pd; | |
202 | /* Lock for lists */ | |
203 | spinlock_t lock; | |
204 | /* lock for allocations */ | |
205 | struct mutex mutex; | |
206 | }; | |
207 | ||
c68cfb71 SK |
208 | static void fastrpc_free_map(struct kref *ref) |
209 | { | |
210 | struct fastrpc_map *map; | |
211 | ||
212 | map = container_of(ref, struct fastrpc_map, refcount); | |
213 | ||
214 | if (map->table) { | |
215 | dma_buf_unmap_attachment(map->attach, map->table, | |
216 | DMA_BIDIRECTIONAL); | |
217 | dma_buf_detach(map->buf, map->attach); | |
218 | dma_buf_put(map->buf); | |
219 | } | |
220 | ||
221 | kfree(map); | |
222 | } | |
223 | ||
224 | static void fastrpc_map_put(struct fastrpc_map *map) | |
225 | { | |
226 | if (map) | |
227 | kref_put(&map->refcount, fastrpc_free_map); | |
228 | } | |
229 | ||
230 | static void fastrpc_map_get(struct fastrpc_map *map) | |
231 | { | |
232 | if (map) | |
233 | kref_get(&map->refcount); | |
234 | } | |
235 | ||
236 | static int fastrpc_map_find(struct fastrpc_user *fl, int fd, | |
237 | struct fastrpc_map **ppmap) | |
238 | { | |
239 | struct fastrpc_map *map = NULL; | |
240 | ||
241 | mutex_lock(&fl->mutex); | |
242 | list_for_each_entry(map, &fl->maps, node) { | |
243 | if (map->fd == fd) { | |
244 | fastrpc_map_get(map); | |
245 | *ppmap = map; | |
246 | mutex_unlock(&fl->mutex); | |
247 | return 0; | |
248 | } | |
249 | } | |
250 | mutex_unlock(&fl->mutex); | |
251 | ||
252 | return -ENOENT; | |
253 | } | |
254 | ||
255 | static void fastrpc_buf_free(struct fastrpc_buf *buf) | |
256 | { | |
257 | dma_free_coherent(buf->dev, buf->size, buf->virt, | |
258 | FASTRPC_PHYS(buf->phys)); | |
259 | kfree(buf); | |
260 | } | |
261 | ||
262 | static int fastrpc_buf_alloc(struct fastrpc_user *fl, struct device *dev, | |
263 | u64 size, struct fastrpc_buf **obuf) | |
264 | { | |
265 | struct fastrpc_buf *buf; | |
266 | ||
267 | buf = kzalloc(sizeof(*buf), GFP_KERNEL); | |
268 | if (!buf) | |
269 | return -ENOMEM; | |
270 | ||
6cffd795 SK |
271 | INIT_LIST_HEAD(&buf->attachments); |
272 | mutex_init(&buf->lock); | |
273 | ||
c68cfb71 SK |
274 | buf->fl = fl; |
275 | buf->virt = NULL; | |
276 | buf->phys = 0; | |
277 | buf->size = size; | |
278 | buf->dev = dev; | |
279 | ||
280 | buf->virt = dma_alloc_coherent(dev, buf->size, (dma_addr_t *)&buf->phys, | |
281 | GFP_KERNEL); | |
282 | if (!buf->virt) | |
283 | return -ENOMEM; | |
284 | ||
285 | if (fl->sctx && fl->sctx->sid) | |
286 | buf->phys += ((u64)fl->sctx->sid << 32); | |
287 | ||
288 | *obuf = buf; | |
289 | ||
290 | return 0; | |
291 | } | |
292 | ||
293 | static void fastrpc_context_free(struct kref *ref) | |
294 | { | |
295 | struct fastrpc_invoke_ctx *ctx; | |
296 | struct fastrpc_channel_ctx *cctx; | |
977e6c8d | 297 | unsigned long flags; |
c68cfb71 SK |
298 | int i; |
299 | ||
300 | ctx = container_of(ref, struct fastrpc_invoke_ctx, refcount); | |
301 | cctx = ctx->cctx; | |
302 | ||
303 | for (i = 0; i < ctx->nscalars; i++) | |
304 | fastrpc_map_put(ctx->maps[i]); | |
305 | ||
306 | if (ctx->buf) | |
307 | fastrpc_buf_free(ctx->buf); | |
308 | ||
977e6c8d | 309 | spin_lock_irqsave(&cctx->lock, flags); |
c68cfb71 | 310 | idr_remove(&cctx->ctx_idr, ctx->ctxid >> 4); |
977e6c8d | 311 | spin_unlock_irqrestore(&cctx->lock, flags); |
c68cfb71 SK |
312 | |
313 | kfree(ctx->maps); | |
25e8dfb8 | 314 | kfree(ctx->olaps); |
c68cfb71 SK |
315 | kfree(ctx); |
316 | } | |
317 | ||
318 | static void fastrpc_context_get(struct fastrpc_invoke_ctx *ctx) | |
319 | { | |
320 | kref_get(&ctx->refcount); | |
321 | } | |
322 | ||
323 | static void fastrpc_context_put(struct fastrpc_invoke_ctx *ctx) | |
324 | { | |
325 | kref_put(&ctx->refcount, fastrpc_context_free); | |
326 | } | |
327 | ||
8e7389c7 TE |
328 | static void fastrpc_context_put_wq(struct work_struct *work) |
329 | { | |
330 | struct fastrpc_invoke_ctx *ctx = | |
331 | container_of(work, struct fastrpc_invoke_ctx, put_work); | |
332 | ||
333 | fastrpc_context_put(ctx); | |
334 | } | |
335 | ||
25e8dfb8 SK |
336 | #define CMP(aa, bb) ((aa) == (bb) ? 0 : (aa) < (bb) ? -1 : 1) |
337 | static int olaps_cmp(const void *a, const void *b) | |
338 | { | |
339 | struct fastrpc_buf_overlap *pa = (struct fastrpc_buf_overlap *)a; | |
340 | struct fastrpc_buf_overlap *pb = (struct fastrpc_buf_overlap *)b; | |
341 | /* sort with lowest starting buffer first */ | |
342 | int st = CMP(pa->start, pb->start); | |
343 | /* sort with highest ending buffer first */ | |
344 | int ed = CMP(pb->end, pa->end); | |
345 | ||
346 | return st == 0 ? ed : st; | |
347 | } | |
348 | ||
349 | static void fastrpc_get_buff_overlaps(struct fastrpc_invoke_ctx *ctx) | |
350 | { | |
351 | u64 max_end = 0; | |
352 | int i; | |
353 | ||
354 | for (i = 0; i < ctx->nbufs; ++i) { | |
355 | ctx->olaps[i].start = ctx->args[i].ptr; | |
356 | ctx->olaps[i].end = ctx->olaps[i].start + ctx->args[i].length; | |
357 | ctx->olaps[i].raix = i; | |
358 | } | |
359 | ||
360 | sort(ctx->olaps, ctx->nbufs, sizeof(*ctx->olaps), olaps_cmp, NULL); | |
361 | ||
362 | for (i = 0; i < ctx->nbufs; ++i) { | |
363 | /* Falling inside previous range */ | |
364 | if (ctx->olaps[i].start < max_end) { | |
365 | ctx->olaps[i].mstart = max_end; | |
366 | ctx->olaps[i].mend = ctx->olaps[i].end; | |
367 | ctx->olaps[i].offset = max_end - ctx->olaps[i].start; | |
368 | ||
369 | if (ctx->olaps[i].end > max_end) { | |
370 | max_end = ctx->olaps[i].end; | |
371 | } else { | |
372 | ctx->olaps[i].mend = 0; | |
373 | ctx->olaps[i].mstart = 0; | |
374 | } | |
375 | ||
376 | } else { | |
377 | ctx->olaps[i].mend = ctx->olaps[i].end; | |
378 | ctx->olaps[i].mstart = ctx->olaps[i].start; | |
379 | ctx->olaps[i].offset = 0; | |
380 | max_end = ctx->olaps[i].end; | |
381 | } | |
382 | } | |
383 | } | |
384 | ||
c68cfb71 SK |
385 | static struct fastrpc_invoke_ctx *fastrpc_context_alloc( |
386 | struct fastrpc_user *user, u32 kernel, u32 sc, | |
387 | struct fastrpc_invoke_args *args) | |
388 | { | |
389 | struct fastrpc_channel_ctx *cctx = user->cctx; | |
390 | struct fastrpc_invoke_ctx *ctx = NULL; | |
977e6c8d | 391 | unsigned long flags; |
c68cfb71 SK |
392 | int ret; |
393 | ||
394 | ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); | |
395 | if (!ctx) | |
396 | return ERR_PTR(-ENOMEM); | |
397 | ||
398 | INIT_LIST_HEAD(&ctx->node); | |
399 | ctx->fl = user; | |
400 | ctx->nscalars = REMOTE_SCALARS_LENGTH(sc); | |
401 | ctx->nbufs = REMOTE_SCALARS_INBUFS(sc) + | |
402 | REMOTE_SCALARS_OUTBUFS(sc); | |
403 | ||
404 | if (ctx->nscalars) { | |
405 | ctx->maps = kcalloc(ctx->nscalars, | |
406 | sizeof(*ctx->maps), GFP_KERNEL); | |
407 | if (!ctx->maps) { | |
408 | kfree(ctx); | |
409 | return ERR_PTR(-ENOMEM); | |
410 | } | |
25e8dfb8 SK |
411 | ctx->olaps = kcalloc(ctx->nscalars, |
412 | sizeof(*ctx->olaps), GFP_KERNEL); | |
413 | if (!ctx->olaps) { | |
414 | kfree(ctx->maps); | |
415 | kfree(ctx); | |
416 | return ERR_PTR(-ENOMEM); | |
417 | } | |
c68cfb71 | 418 | ctx->args = args; |
25e8dfb8 | 419 | fastrpc_get_buff_overlaps(ctx); |
c68cfb71 SK |
420 | } |
421 | ||
422 | ctx->sc = sc; | |
423 | ctx->retval = -1; | |
424 | ctx->pid = current->pid; | |
425 | ctx->tgid = user->tgid; | |
426 | ctx->cctx = cctx; | |
427 | init_completion(&ctx->work); | |
8e7389c7 | 428 | INIT_WORK(&ctx->put_work, fastrpc_context_put_wq); |
c68cfb71 SK |
429 | |
430 | spin_lock(&user->lock); | |
431 | list_add_tail(&ctx->node, &user->pending); | |
432 | spin_unlock(&user->lock); | |
433 | ||
977e6c8d | 434 | spin_lock_irqsave(&cctx->lock, flags); |
c68cfb71 SK |
435 | ret = idr_alloc_cyclic(&cctx->ctx_idr, ctx, 1, |
436 | FASTRPC_CTX_MAX, GFP_ATOMIC); | |
437 | if (ret < 0) { | |
977e6c8d | 438 | spin_unlock_irqrestore(&cctx->lock, flags); |
c68cfb71 SK |
439 | goto err_idr; |
440 | } | |
441 | ctx->ctxid = ret << 4; | |
977e6c8d | 442 | spin_unlock_irqrestore(&cctx->lock, flags); |
c68cfb71 SK |
443 | |
444 | kref_init(&ctx->refcount); | |
445 | ||
446 | return ctx; | |
447 | err_idr: | |
448 | spin_lock(&user->lock); | |
449 | list_del(&ctx->node); | |
450 | spin_unlock(&user->lock); | |
451 | kfree(ctx->maps); | |
25e8dfb8 | 452 | kfree(ctx->olaps); |
c68cfb71 SK |
453 | kfree(ctx); |
454 | ||
455 | return ERR_PTR(ret); | |
456 | } | |
457 | ||
6cffd795 SK |
458 | static struct sg_table * |
459 | fastrpc_map_dma_buf(struct dma_buf_attachment *attachment, | |
460 | enum dma_data_direction dir) | |
461 | { | |
462 | struct fastrpc_dma_buf_attachment *a = attachment->priv; | |
463 | struct sg_table *table; | |
464 | ||
465 | table = &a->sgt; | |
466 | ||
467 | if (!dma_map_sg(attachment->dev, table->sgl, table->nents, dir)) | |
468 | return ERR_PTR(-ENOMEM); | |
469 | ||
470 | return table; | |
471 | } | |
472 | ||
473 | static void fastrpc_unmap_dma_buf(struct dma_buf_attachment *attach, | |
474 | struct sg_table *table, | |
475 | enum dma_data_direction dir) | |
476 | { | |
477 | dma_unmap_sg(attach->dev, table->sgl, table->nents, dir); | |
478 | } | |
479 | ||
480 | static void fastrpc_release(struct dma_buf *dmabuf) | |
481 | { | |
482 | struct fastrpc_buf *buffer = dmabuf->priv; | |
483 | ||
484 | fastrpc_buf_free(buffer); | |
485 | } | |
486 | ||
487 | static int fastrpc_dma_buf_attach(struct dma_buf *dmabuf, | |
488 | struct dma_buf_attachment *attachment) | |
489 | { | |
490 | struct fastrpc_dma_buf_attachment *a; | |
491 | struct fastrpc_buf *buffer = dmabuf->priv; | |
492 | int ret; | |
493 | ||
494 | a = kzalloc(sizeof(*a), GFP_KERNEL); | |
495 | if (!a) | |
496 | return -ENOMEM; | |
497 | ||
498 | ret = dma_get_sgtable(buffer->dev, &a->sgt, buffer->virt, | |
499 | FASTRPC_PHYS(buffer->phys), buffer->size); | |
500 | if (ret < 0) { | |
501 | dev_err(buffer->dev, "failed to get scatterlist from DMA API\n"); | |
502 | return -EINVAL; | |
503 | } | |
504 | ||
505 | a->dev = attachment->dev; | |
506 | INIT_LIST_HEAD(&a->node); | |
507 | attachment->priv = a; | |
508 | ||
509 | mutex_lock(&buffer->lock); | |
510 | list_add(&a->node, &buffer->attachments); | |
511 | mutex_unlock(&buffer->lock); | |
512 | ||
513 | return 0; | |
514 | } | |
515 | ||
516 | static void fastrpc_dma_buf_detatch(struct dma_buf *dmabuf, | |
517 | struct dma_buf_attachment *attachment) | |
518 | { | |
519 | struct fastrpc_dma_buf_attachment *a = attachment->priv; | |
520 | struct fastrpc_buf *buffer = dmabuf->priv; | |
521 | ||
522 | mutex_lock(&buffer->lock); | |
523 | list_del(&a->node); | |
524 | mutex_unlock(&buffer->lock); | |
525 | kfree(a); | |
526 | } | |
527 | ||
528 | static void *fastrpc_kmap(struct dma_buf *dmabuf, unsigned long pgnum) | |
529 | { | |
530 | struct fastrpc_buf *buf = dmabuf->priv; | |
531 | ||
532 | return buf->virt ? buf->virt + pgnum * PAGE_SIZE : NULL; | |
533 | } | |
534 | ||
535 | static void *fastrpc_vmap(struct dma_buf *dmabuf) | |
536 | { | |
537 | struct fastrpc_buf *buf = dmabuf->priv; | |
538 | ||
539 | return buf->virt; | |
540 | } | |
541 | ||
542 | static int fastrpc_mmap(struct dma_buf *dmabuf, | |
543 | struct vm_area_struct *vma) | |
544 | { | |
545 | struct fastrpc_buf *buf = dmabuf->priv; | |
546 | size_t size = vma->vm_end - vma->vm_start; | |
547 | ||
548 | return dma_mmap_coherent(buf->dev, vma, buf->virt, | |
549 | FASTRPC_PHYS(buf->phys), size); | |
550 | } | |
551 | ||
552 | static const struct dma_buf_ops fastrpc_dma_buf_ops = { | |
553 | .attach = fastrpc_dma_buf_attach, | |
554 | .detach = fastrpc_dma_buf_detatch, | |
555 | .map_dma_buf = fastrpc_map_dma_buf, | |
556 | .unmap_dma_buf = fastrpc_unmap_dma_buf, | |
557 | .mmap = fastrpc_mmap, | |
558 | .map = fastrpc_kmap, | |
559 | .vmap = fastrpc_vmap, | |
560 | .release = fastrpc_release, | |
561 | }; | |
562 | ||
c68cfb71 SK |
563 | static int fastrpc_map_create(struct fastrpc_user *fl, int fd, |
564 | u64 len, struct fastrpc_map **ppmap) | |
565 | { | |
566 | struct fastrpc_session_ctx *sess = fl->sctx; | |
567 | struct fastrpc_map *map = NULL; | |
568 | int err = 0; | |
569 | ||
570 | if (!fastrpc_map_find(fl, fd, ppmap)) | |
571 | return 0; | |
572 | ||
573 | map = kzalloc(sizeof(*map), GFP_KERNEL); | |
574 | if (!map) | |
575 | return -ENOMEM; | |
576 | ||
577 | INIT_LIST_HEAD(&map->node); | |
578 | map->fl = fl; | |
579 | map->fd = fd; | |
580 | map->buf = dma_buf_get(fd); | |
682a6044 WY |
581 | if (IS_ERR(map->buf)) { |
582 | err = PTR_ERR(map->buf); | |
c68cfb71 SK |
583 | goto get_err; |
584 | } | |
585 | ||
586 | map->attach = dma_buf_attach(map->buf, sess->dev); | |
587 | if (IS_ERR(map->attach)) { | |
588 | dev_err(sess->dev, "Failed to attach dmabuf\n"); | |
589 | err = PTR_ERR(map->attach); | |
590 | goto attach_err; | |
591 | } | |
592 | ||
593 | map->table = dma_buf_map_attachment(map->attach, DMA_BIDIRECTIONAL); | |
594 | if (IS_ERR(map->table)) { | |
595 | err = PTR_ERR(map->table); | |
596 | goto map_err; | |
597 | } | |
598 | ||
599 | map->phys = sg_dma_address(map->table->sgl); | |
600 | map->phys += ((u64)fl->sctx->sid << 32); | |
601 | map->size = len; | |
602 | map->va = sg_virt(map->table->sgl); | |
603 | map->len = len; | |
604 | kref_init(&map->refcount); | |
605 | ||
606 | spin_lock(&fl->lock); | |
607 | list_add_tail(&map->node, &fl->maps); | |
608 | spin_unlock(&fl->lock); | |
609 | *ppmap = map; | |
610 | ||
611 | return 0; | |
612 | ||
613 | map_err: | |
614 | dma_buf_detach(map->buf, map->attach); | |
615 | attach_err: | |
616 | dma_buf_put(map->buf); | |
617 | get_err: | |
618 | kfree(map); | |
619 | ||
620 | return err; | |
621 | } | |
622 | ||
623 | /* | |
624 | * Fastrpc payload buffer with metadata looks like: | |
625 | * | |
626 | * >>>>>> START of METADATA <<<<<<<<< | |
627 | * +---------------------------------+ | |
628 | * | Arguments | | |
629 | * | type:(struct fastrpc_remote_arg)| | |
630 | * | (0 - N) | | |
631 | * +---------------------------------+ | |
632 | * | Invoke Buffer list | | |
633 | * | type:(struct fastrpc_invoke_buf)| | |
634 | * | (0 - N) | | |
635 | * +---------------------------------+ | |
636 | * | Page info list | | |
637 | * | type:(struct fastrpc_phy_page) | | |
638 | * | (0 - N) | | |
639 | * +---------------------------------+ | |
640 | * | Optional info | | |
641 | * |(can be specific to SoC/Firmware)| | |
642 | * +---------------------------------+ | |
643 | * >>>>>>>> END of METADATA <<<<<<<<< | |
644 | * +---------------------------------+ | |
645 | * | Inline ARGS | | |
646 | * | (0-N) | | |
647 | * +---------------------------------+ | |
648 | */ | |
649 | ||
650 | static int fastrpc_get_meta_size(struct fastrpc_invoke_ctx *ctx) | |
651 | { | |
652 | int size = 0; | |
653 | ||
654 | size = (sizeof(struct fastrpc_remote_arg) + | |
655 | sizeof(struct fastrpc_invoke_buf) + | |
656 | sizeof(struct fastrpc_phy_page)) * ctx->nscalars + | |
657 | sizeof(u64) * FASTRPC_MAX_FDLIST + | |
658 | sizeof(u32) * FASTRPC_MAX_CRCLIST; | |
659 | ||
660 | return size; | |
661 | } | |
662 | ||
663 | static u64 fastrpc_get_payload_size(struct fastrpc_invoke_ctx *ctx, int metalen) | |
664 | { | |
665 | u64 size = 0; | |
666 | int i; | |
667 | ||
668 | size = ALIGN(metalen, FASTRPC_ALIGN); | |
669 | for (i = 0; i < ctx->nscalars; i++) { | |
670 | if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1) { | |
25e8dfb8 SK |
671 | |
672 | if (ctx->olaps[i].offset == 0) | |
673 | size = ALIGN(size, FASTRPC_ALIGN); | |
674 | ||
675 | size += (ctx->olaps[i].mend - ctx->olaps[i].mstart); | |
c68cfb71 SK |
676 | } |
677 | } | |
678 | ||
679 | return size; | |
680 | } | |
681 | ||
682 | static int fastrpc_create_maps(struct fastrpc_invoke_ctx *ctx) | |
683 | { | |
684 | struct device *dev = ctx->fl->sctx->dev; | |
685 | int i, err; | |
686 | ||
687 | for (i = 0; i < ctx->nscalars; ++i) { | |
688 | /* Make sure reserved field is set to 0 */ | |
689 | if (ctx->args[i].reserved) | |
690 | return -EINVAL; | |
691 | ||
692 | if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1 || | |
693 | ctx->args[i].length == 0) | |
694 | continue; | |
695 | ||
696 | err = fastrpc_map_create(ctx->fl, ctx->args[i].fd, | |
697 | ctx->args[i].length, &ctx->maps[i]); | |
698 | if (err) { | |
699 | dev_err(dev, "Error Creating map %d\n", err); | |
700 | return -EINVAL; | |
701 | } | |
702 | ||
703 | } | |
704 | return 0; | |
705 | } | |
706 | ||
707 | static int fastrpc_get_args(u32 kernel, struct fastrpc_invoke_ctx *ctx) | |
708 | { | |
709 | struct device *dev = ctx->fl->sctx->dev; | |
710 | struct fastrpc_remote_arg *rpra; | |
711 | struct fastrpc_invoke_buf *list; | |
712 | struct fastrpc_phy_page *pages; | |
25e8dfb8 SK |
713 | int inbufs, i, oix, err = 0; |
714 | u64 len, rlen, pkt_size; | |
02b45b47 | 715 | u64 pg_start, pg_end; |
c68cfb71 SK |
716 | uintptr_t args; |
717 | int metalen; | |
718 | ||
c68cfb71 SK |
719 | inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); |
720 | metalen = fastrpc_get_meta_size(ctx); | |
721 | pkt_size = fastrpc_get_payload_size(ctx, metalen); | |
722 | ||
723 | err = fastrpc_create_maps(ctx); | |
724 | if (err) | |
725 | return err; | |
726 | ||
727 | ctx->msg_sz = pkt_size; | |
728 | ||
729 | err = fastrpc_buf_alloc(ctx->fl, dev, pkt_size, &ctx->buf); | |
730 | if (err) | |
731 | return err; | |
732 | ||
733 | rpra = ctx->buf->virt; | |
734 | list = ctx->buf->virt + ctx->nscalars * sizeof(*rpra); | |
735 | pages = ctx->buf->virt + ctx->nscalars * (sizeof(*list) + | |
736 | sizeof(*rpra)); | |
737 | args = (uintptr_t)ctx->buf->virt + metalen; | |
738 | rlen = pkt_size - metalen; | |
739 | ctx->rpra = rpra; | |
740 | ||
25e8dfb8 SK |
741 | for (oix = 0; oix < ctx->nbufs; ++oix) { |
742 | int mlen; | |
743 | ||
744 | i = ctx->olaps[oix].raix; | |
745 | len = ctx->args[i].length; | |
c68cfb71 SK |
746 | |
747 | rpra[i].pv = 0; | |
748 | rpra[i].len = len; | |
749 | list[i].num = len ? 1 : 0; | |
750 | list[i].pgidx = i; | |
751 | ||
752 | if (!len) | |
753 | continue; | |
754 | ||
c68cfb71 | 755 | if (ctx->maps[i]) { |
80f3afd7 SK |
756 | struct vm_area_struct *vma = NULL; |
757 | ||
c68cfb71 SK |
758 | rpra[i].pv = (u64) ctx->args[i].ptr; |
759 | pages[i].addr = ctx->maps[i]->phys; | |
80f3afd7 SK |
760 | |
761 | vma = find_vma(current->mm, ctx->args[i].ptr); | |
762 | if (vma) | |
763 | pages[i].addr += ctx->args[i].ptr - | |
764 | vma->vm_start; | |
765 | ||
02b45b47 SK |
766 | pg_start = (ctx->args[i].ptr & PAGE_MASK) >> PAGE_SHIFT; |
767 | pg_end = ((ctx->args[i].ptr + len - 1) & PAGE_MASK) >> | |
768 | PAGE_SHIFT; | |
769 | pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; | |
770 | ||
c68cfb71 | 771 | } else { |
25e8dfb8 SK |
772 | |
773 | if (ctx->olaps[oix].offset == 0) { | |
774 | rlen -= ALIGN(args, FASTRPC_ALIGN) - args; | |
775 | args = ALIGN(args, FASTRPC_ALIGN); | |
776 | } | |
777 | ||
778 | mlen = ctx->olaps[oix].mend - ctx->olaps[oix].mstart; | |
779 | ||
780 | if (rlen < mlen) | |
c68cfb71 SK |
781 | goto bail; |
782 | ||
25e8dfb8 SK |
783 | rpra[i].pv = args - ctx->olaps[oix].offset; |
784 | pages[i].addr = ctx->buf->phys - | |
785 | ctx->olaps[oix].offset + | |
786 | (pkt_size - rlen); | |
c68cfb71 | 787 | pages[i].addr = pages[i].addr & PAGE_MASK; |
25e8dfb8 | 788 | |
02b45b47 SK |
789 | pg_start = (args & PAGE_MASK) >> PAGE_SHIFT; |
790 | pg_end = ((args + len - 1) & PAGE_MASK) >> PAGE_SHIFT; | |
791 | pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; | |
25e8dfb8 SK |
792 | args = args + mlen; |
793 | rlen -= mlen; | |
c68cfb71 SK |
794 | } |
795 | ||
796 | if (i < inbufs && !ctx->maps[i]) { | |
797 | void *dst = (void *)(uintptr_t)rpra[i].pv; | |
798 | void *src = (void *)(uintptr_t)ctx->args[i].ptr; | |
799 | ||
800 | if (!kernel) { | |
801 | if (copy_from_user(dst, (void __user *)src, | |
802 | len)) { | |
803 | err = -EFAULT; | |
804 | goto bail; | |
805 | } | |
806 | } else { | |
807 | memcpy(dst, src, len); | |
808 | } | |
809 | } | |
810 | } | |
811 | ||
812 | for (i = ctx->nbufs; i < ctx->nscalars; ++i) { | |
813 | rpra[i].pv = (u64) ctx->args[i].ptr; | |
814 | rpra[i].len = ctx->args[i].length; | |
815 | list[i].num = ctx->args[i].length ? 1 : 0; | |
816 | list[i].pgidx = i; | |
817 | pages[i].addr = ctx->maps[i]->phys; | |
818 | pages[i].size = ctx->maps[i]->size; | |
819 | } | |
820 | ||
821 | bail: | |
822 | if (err) | |
823 | dev_err(dev, "Error: get invoke args failed:%d\n", err); | |
824 | ||
825 | return err; | |
826 | } | |
827 | ||
828 | static int fastrpc_put_args(struct fastrpc_invoke_ctx *ctx, | |
829 | u32 kernel) | |
830 | { | |
831 | struct fastrpc_remote_arg *rpra = ctx->rpra; | |
832 | int i, inbufs; | |
833 | ||
834 | inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); | |
835 | ||
836 | for (i = inbufs; i < ctx->nbufs; ++i) { | |
837 | void *src = (void *)(uintptr_t)rpra[i].pv; | |
838 | void *dst = (void *)(uintptr_t)ctx->args[i].ptr; | |
839 | u64 len = rpra[i].len; | |
840 | ||
841 | if (!kernel) { | |
842 | if (copy_to_user((void __user *)dst, src, len)) | |
843 | return -EFAULT; | |
844 | } else { | |
845 | memcpy(dst, src, len); | |
846 | } | |
847 | } | |
848 | ||
849 | return 0; | |
850 | } | |
851 | ||
852 | static int fastrpc_invoke_send(struct fastrpc_session_ctx *sctx, | |
853 | struct fastrpc_invoke_ctx *ctx, | |
854 | u32 kernel, uint32_t handle) | |
855 | { | |
856 | struct fastrpc_channel_ctx *cctx; | |
857 | struct fastrpc_user *fl = ctx->fl; | |
858 | struct fastrpc_msg *msg = &ctx->msg; | |
859 | ||
860 | cctx = fl->cctx; | |
861 | msg->pid = fl->tgid; | |
862 | msg->tid = current->pid; | |
863 | ||
864 | if (kernel) | |
865 | msg->pid = 0; | |
866 | ||
867 | msg->ctx = ctx->ctxid | fl->pd; | |
868 | msg->handle = handle; | |
869 | msg->sc = ctx->sc; | |
870 | msg->addr = ctx->buf ? ctx->buf->phys : 0; | |
871 | msg->size = roundup(ctx->msg_sz, PAGE_SIZE); | |
872 | fastrpc_context_get(ctx); | |
873 | ||
874 | return rpmsg_send(cctx->rpdev->ept, (void *)msg, sizeof(*msg)); | |
875 | } | |
876 | ||
877 | static int fastrpc_internal_invoke(struct fastrpc_user *fl, u32 kernel, | |
878 | u32 handle, u32 sc, | |
879 | struct fastrpc_invoke_args *args) | |
880 | { | |
881 | struct fastrpc_invoke_ctx *ctx = NULL; | |
882 | int err = 0; | |
883 | ||
884 | if (!fl->sctx) | |
885 | return -EINVAL; | |
886 | ||
887 | ctx = fastrpc_context_alloc(fl, kernel, sc, args); | |
888 | if (IS_ERR(ctx)) | |
889 | return PTR_ERR(ctx); | |
890 | ||
891 | if (ctx->nscalars) { | |
892 | err = fastrpc_get_args(kernel, ctx); | |
893 | if (err) | |
894 | goto bail; | |
895 | } | |
415a0729 SK |
896 | |
897 | /* make sure that all CPU memory writes are seen by DSP */ | |
898 | dma_wmb(); | |
c68cfb71 SK |
899 | /* Send invoke buffer to remote dsp */ |
900 | err = fastrpc_invoke_send(fl->sctx, ctx, kernel, handle); | |
901 | if (err) | |
902 | goto bail; | |
903 | ||
904 | /* Wait for remote dsp to respond or time out */ | |
905 | err = wait_for_completion_interruptible(&ctx->work); | |
906 | if (err) | |
907 | goto bail; | |
908 | ||
909 | /* Check the response from remote dsp */ | |
910 | err = ctx->retval; | |
911 | if (err) | |
912 | goto bail; | |
913 | ||
914 | if (ctx->nscalars) { | |
415a0729 SK |
915 | /* make sure that all memory writes by DSP are seen by CPU */ |
916 | dma_rmb(); | |
c68cfb71 SK |
917 | /* populate all the output buffers with results */ |
918 | err = fastrpc_put_args(ctx, kernel); | |
919 | if (err) | |
920 | goto bail; | |
921 | } | |
922 | ||
923 | bail: | |
924 | /* We are done with this compute context, remove it from pending list */ | |
925 | spin_lock(&fl->lock); | |
926 | list_del(&ctx->node); | |
927 | spin_unlock(&fl->lock); | |
928 | fastrpc_context_put(ctx); | |
929 | ||
930 | if (err) | |
931 | dev_dbg(fl->sctx->dev, "Error: Invoke Failed %d\n", err); | |
932 | ||
933 | return err; | |
934 | } | |
935 | ||
d73f71c7 SK |
936 | static int fastrpc_init_create_process(struct fastrpc_user *fl, |
937 | char __user *argp) | |
938 | { | |
939 | struct fastrpc_init_create init; | |
940 | struct fastrpc_invoke_args *args; | |
941 | struct fastrpc_phy_page pages[1]; | |
942 | struct fastrpc_map *map = NULL; | |
943 | struct fastrpc_buf *imem = NULL; | |
944 | int memlen; | |
945 | int err; | |
946 | struct { | |
947 | int pgid; | |
948 | u32 namelen; | |
949 | u32 filelen; | |
950 | u32 pageslen; | |
951 | u32 attrs; | |
952 | u32 siglen; | |
953 | } inbuf; | |
954 | u32 sc; | |
955 | ||
956 | args = kcalloc(FASTRPC_CREATE_PROCESS_NARGS, sizeof(*args), GFP_KERNEL); | |
957 | if (!args) | |
958 | return -ENOMEM; | |
959 | ||
960 | if (copy_from_user(&init, argp, sizeof(init))) { | |
961 | err = -EFAULT; | |
b49f6d83 | 962 | goto err; |
d73f71c7 SK |
963 | } |
964 | ||
965 | if (init.filelen > INIT_FILELEN_MAX) { | |
966 | err = -EINVAL; | |
b49f6d83 | 967 | goto err; |
d73f71c7 SK |
968 | } |
969 | ||
970 | inbuf.pgid = fl->tgid; | |
971 | inbuf.namelen = strlen(current->comm) + 1; | |
972 | inbuf.filelen = init.filelen; | |
973 | inbuf.pageslen = 1; | |
974 | inbuf.attrs = init.attrs; | |
975 | inbuf.siglen = init.siglen; | |
976 | fl->pd = 1; | |
977 | ||
978 | if (init.filelen && init.filefd) { | |
979 | err = fastrpc_map_create(fl, init.filefd, init.filelen, &map); | |
980 | if (err) | |
b49f6d83 | 981 | goto err; |
d73f71c7 SK |
982 | } |
983 | ||
984 | memlen = ALIGN(max(INIT_FILELEN_MAX, (int)init.filelen * 4), | |
985 | 1024 * 1024); | |
986 | err = fastrpc_buf_alloc(fl, fl->sctx->dev, memlen, | |
987 | &imem); | |
b49f6d83 TE |
988 | if (err) |
989 | goto err_alloc; | |
d73f71c7 SK |
990 | |
991 | fl->init_mem = imem; | |
992 | args[0].ptr = (u64)(uintptr_t)&inbuf; | |
993 | args[0].length = sizeof(inbuf); | |
994 | args[0].fd = -1; | |
995 | ||
996 | args[1].ptr = (u64)(uintptr_t)current->comm; | |
997 | args[1].length = inbuf.namelen; | |
998 | args[1].fd = -1; | |
999 | ||
1000 | args[2].ptr = (u64) init.file; | |
1001 | args[2].length = inbuf.filelen; | |
1002 | args[2].fd = init.filefd; | |
1003 | ||
1004 | pages[0].addr = imem->phys; | |
1005 | pages[0].size = imem->size; | |
1006 | ||
1007 | args[3].ptr = (u64)(uintptr_t) pages; | |
1008 | args[3].length = 1 * sizeof(*pages); | |
1009 | args[3].fd = -1; | |
1010 | ||
1011 | args[4].ptr = (u64)(uintptr_t)&inbuf.attrs; | |
1012 | args[4].length = sizeof(inbuf.attrs); | |
1013 | args[4].fd = -1; | |
1014 | ||
1015 | args[5].ptr = (u64)(uintptr_t) &inbuf.siglen; | |
1016 | args[5].length = sizeof(inbuf.siglen); | |
1017 | args[5].fd = -1; | |
1018 | ||
1019 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE, 4, 0); | |
1020 | if (init.attrs) | |
1021 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE_ATTR, 6, 0); | |
1022 | ||
1023 | err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, | |
1024 | sc, args); | |
b49f6d83 TE |
1025 | if (err) |
1026 | goto err_invoke; | |
1027 | ||
1028 | kfree(args); | |
d73f71c7 | 1029 | |
b49f6d83 TE |
1030 | return 0; |
1031 | ||
1032 | err_invoke: | |
1033 | fl->init_mem = NULL; | |
1034 | fastrpc_buf_free(imem); | |
1035 | err_alloc: | |
1036 | if (map) { | |
1037 | spin_lock(&fl->lock); | |
1038 | list_del(&map->node); | |
1039 | spin_unlock(&fl->lock); | |
d73f71c7 | 1040 | fastrpc_map_put(map); |
d73f71c7 | 1041 | } |
b49f6d83 | 1042 | err: |
d73f71c7 SK |
1043 | kfree(args); |
1044 | ||
1045 | return err; | |
1046 | } | |
1047 | ||
f6f9279f SK |
1048 | static struct fastrpc_session_ctx *fastrpc_session_alloc( |
1049 | struct fastrpc_channel_ctx *cctx) | |
1050 | { | |
1051 | struct fastrpc_session_ctx *session = NULL; | |
977e6c8d | 1052 | unsigned long flags; |
f6f9279f SK |
1053 | int i; |
1054 | ||
977e6c8d | 1055 | spin_lock_irqsave(&cctx->lock, flags); |
f6f9279f SK |
1056 | for (i = 0; i < cctx->sesscount; i++) { |
1057 | if (!cctx->session[i].used && cctx->session[i].valid) { | |
1058 | cctx->session[i].used = true; | |
1059 | session = &cctx->session[i]; | |
1060 | break; | |
1061 | } | |
1062 | } | |
977e6c8d | 1063 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f SK |
1064 | |
1065 | return session; | |
1066 | } | |
1067 | ||
1068 | static void fastrpc_session_free(struct fastrpc_channel_ctx *cctx, | |
1069 | struct fastrpc_session_ctx *session) | |
1070 | { | |
977e6c8d SK |
1071 | unsigned long flags; |
1072 | ||
1073 | spin_lock_irqsave(&cctx->lock, flags); | |
f6f9279f | 1074 | session->used = false; |
977e6c8d | 1075 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f SK |
1076 | } |
1077 | ||
d73f71c7 SK |
1078 | static int fastrpc_release_current_dsp_process(struct fastrpc_user *fl) |
1079 | { | |
1080 | struct fastrpc_invoke_args args[1]; | |
1081 | int tgid = 0; | |
1082 | u32 sc; | |
1083 | ||
1084 | tgid = fl->tgid; | |
1085 | args[0].ptr = (u64)(uintptr_t) &tgid; | |
1086 | args[0].length = sizeof(tgid); | |
1087 | args[0].fd = -1; | |
1088 | args[0].reserved = 0; | |
1089 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_RELEASE, 1, 0); | |
1090 | ||
1091 | return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, | |
1092 | sc, &args[0]); | |
1093 | } | |
1094 | ||
f6f9279f SK |
1095 | static int fastrpc_device_release(struct inode *inode, struct file *file) |
1096 | { | |
1097 | struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; | |
1098 | struct fastrpc_channel_ctx *cctx = fl->cctx; | |
c68cfb71 SK |
1099 | struct fastrpc_invoke_ctx *ctx, *n; |
1100 | struct fastrpc_map *map, *m; | |
977e6c8d | 1101 | unsigned long flags; |
f6f9279f | 1102 | |
d73f71c7 SK |
1103 | fastrpc_release_current_dsp_process(fl); |
1104 | ||
977e6c8d | 1105 | spin_lock_irqsave(&cctx->lock, flags); |
f6f9279f | 1106 | list_del(&fl->user); |
977e6c8d | 1107 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f | 1108 | |
c68cfb71 SK |
1109 | if (fl->init_mem) |
1110 | fastrpc_buf_free(fl->init_mem); | |
1111 | ||
1112 | list_for_each_entry_safe(ctx, n, &fl->pending, node) { | |
1113 | list_del(&ctx->node); | |
1114 | fastrpc_context_put(ctx); | |
1115 | } | |
1116 | ||
1117 | list_for_each_entry_safe(map, m, &fl->maps, node) { | |
1118 | list_del(&map->node); | |
1119 | fastrpc_map_put(map); | |
1120 | } | |
1121 | ||
f6f9279f SK |
1122 | fastrpc_session_free(cctx, fl->sctx); |
1123 | ||
1124 | mutex_destroy(&fl->mutex); | |
1125 | kfree(fl); | |
1126 | file->private_data = NULL; | |
1127 | ||
1128 | return 0; | |
1129 | } | |
1130 | ||
1131 | static int fastrpc_device_open(struct inode *inode, struct file *filp) | |
1132 | { | |
1133 | struct fastrpc_channel_ctx *cctx = miscdev_to_cctx(filp->private_data); | |
1134 | struct fastrpc_user *fl = NULL; | |
977e6c8d | 1135 | unsigned long flags; |
f6f9279f SK |
1136 | |
1137 | fl = kzalloc(sizeof(*fl), GFP_KERNEL); | |
1138 | if (!fl) | |
1139 | return -ENOMEM; | |
1140 | ||
1141 | filp->private_data = fl; | |
1142 | spin_lock_init(&fl->lock); | |
1143 | mutex_init(&fl->mutex); | |
1144 | INIT_LIST_HEAD(&fl->pending); | |
1145 | INIT_LIST_HEAD(&fl->maps); | |
1146 | INIT_LIST_HEAD(&fl->user); | |
1147 | fl->tgid = current->tgid; | |
1148 | fl->cctx = cctx; | |
7c11df42 TE |
1149 | |
1150 | fl->sctx = fastrpc_session_alloc(cctx); | |
1151 | if (!fl->sctx) { | |
1152 | dev_err(&cctx->rpdev->dev, "No session available\n"); | |
1153 | mutex_destroy(&fl->mutex); | |
1154 | kfree(fl); | |
1155 | ||
1156 | return -EBUSY; | |
1157 | } | |
1158 | ||
977e6c8d | 1159 | spin_lock_irqsave(&cctx->lock, flags); |
f6f9279f | 1160 | list_add_tail(&fl->user, &cctx->users); |
977e6c8d | 1161 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f SK |
1162 | |
1163 | return 0; | |
1164 | } | |
1165 | ||
6cffd795 SK |
1166 | static int fastrpc_dmabuf_free(struct fastrpc_user *fl, char __user *argp) |
1167 | { | |
1168 | struct dma_buf *buf; | |
1169 | int info; | |
1170 | ||
1171 | if (copy_from_user(&info, argp, sizeof(info))) | |
1172 | return -EFAULT; | |
1173 | ||
1174 | buf = dma_buf_get(info); | |
1175 | if (IS_ERR_OR_NULL(buf)) | |
1176 | return -EINVAL; | |
1177 | /* | |
1178 | * one for the last get and other for the ALLOC_DMA_BUFF ioctl | |
1179 | */ | |
1180 | dma_buf_put(buf); | |
1181 | dma_buf_put(buf); | |
1182 | ||
1183 | return 0; | |
1184 | } | |
1185 | ||
1186 | static int fastrpc_dmabuf_alloc(struct fastrpc_user *fl, char __user *argp) | |
1187 | { | |
1188 | struct fastrpc_alloc_dma_buf bp; | |
1189 | DEFINE_DMA_BUF_EXPORT_INFO(exp_info); | |
1190 | struct fastrpc_buf *buf = NULL; | |
1191 | int err; | |
1192 | ||
1193 | if (copy_from_user(&bp, argp, sizeof(bp))) | |
1194 | return -EFAULT; | |
1195 | ||
1196 | err = fastrpc_buf_alloc(fl, fl->sctx->dev, bp.size, &buf); | |
1197 | if (err) | |
1198 | return err; | |
1199 | exp_info.ops = &fastrpc_dma_buf_ops; | |
1200 | exp_info.size = bp.size; | |
1201 | exp_info.flags = O_RDWR; | |
1202 | exp_info.priv = buf; | |
1203 | buf->dmabuf = dma_buf_export(&exp_info); | |
1204 | if (IS_ERR(buf->dmabuf)) { | |
1205 | err = PTR_ERR(buf->dmabuf); | |
1206 | fastrpc_buf_free(buf); | |
1207 | return err; | |
1208 | } | |
1209 | ||
1210 | bp.fd = dma_buf_fd(buf->dmabuf, O_ACCMODE); | |
1211 | if (bp.fd < 0) { | |
1212 | dma_buf_put(buf->dmabuf); | |
1213 | return -EINVAL; | |
1214 | } | |
1215 | ||
1216 | if (copy_to_user(argp, &bp, sizeof(bp))) { | |
1217 | dma_buf_put(buf->dmabuf); | |
1218 | return -EFAULT; | |
1219 | } | |
1220 | ||
1221 | get_dma_buf(buf->dmabuf); | |
1222 | ||
1223 | return 0; | |
1224 | } | |
1225 | ||
d73f71c7 SK |
1226 | static int fastrpc_init_attach(struct fastrpc_user *fl) |
1227 | { | |
1228 | struct fastrpc_invoke_args args[1]; | |
1229 | int tgid = fl->tgid; | |
1230 | u32 sc; | |
1231 | ||
1232 | args[0].ptr = (u64)(uintptr_t) &tgid; | |
1233 | args[0].length = sizeof(tgid); | |
1234 | args[0].fd = -1; | |
1235 | args[0].reserved = 0; | |
1236 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_ATTACH, 1, 0); | |
1237 | fl->pd = 0; | |
1238 | ||
1239 | return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, | |
1240 | sc, &args[0]); | |
1241 | } | |
1242 | ||
c68cfb71 SK |
1243 | static int fastrpc_invoke(struct fastrpc_user *fl, char __user *argp) |
1244 | { | |
1245 | struct fastrpc_invoke_args *args = NULL; | |
1246 | struct fastrpc_invoke inv; | |
1247 | u32 nscalars; | |
1248 | int err; | |
1249 | ||
1250 | if (copy_from_user(&inv, argp, sizeof(inv))) | |
1251 | return -EFAULT; | |
1252 | ||
1253 | /* nscalars is truncated here to max supported value */ | |
1254 | nscalars = REMOTE_SCALARS_LENGTH(inv.sc); | |
1255 | if (nscalars) { | |
1256 | args = kcalloc(nscalars, sizeof(*args), GFP_KERNEL); | |
1257 | if (!args) | |
1258 | return -ENOMEM; | |
1259 | ||
1260 | if (copy_from_user(args, (void __user *)(uintptr_t)inv.args, | |
1261 | nscalars * sizeof(*args))) { | |
1262 | kfree(args); | |
1263 | return -EFAULT; | |
1264 | } | |
1265 | } | |
1266 | ||
1267 | err = fastrpc_internal_invoke(fl, false, inv.handle, inv.sc, args); | |
1268 | kfree(args); | |
1269 | ||
1270 | return err; | |
1271 | } | |
1272 | ||
1273 | static long fastrpc_device_ioctl(struct file *file, unsigned int cmd, | |
1274 | unsigned long arg) | |
1275 | { | |
1276 | struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; | |
1277 | char __user *argp = (char __user *)arg; | |
1278 | int err; | |
1279 | ||
1280 | switch (cmd) { | |
1281 | case FASTRPC_IOCTL_INVOKE: | |
1282 | err = fastrpc_invoke(fl, argp); | |
1283 | break; | |
d73f71c7 SK |
1284 | case FASTRPC_IOCTL_INIT_ATTACH: |
1285 | err = fastrpc_init_attach(fl); | |
1286 | break; | |
1287 | case FASTRPC_IOCTL_INIT_CREATE: | |
1288 | err = fastrpc_init_create_process(fl, argp); | |
1289 | break; | |
6cffd795 SK |
1290 | case FASTRPC_IOCTL_FREE_DMA_BUFF: |
1291 | err = fastrpc_dmabuf_free(fl, argp); | |
1292 | break; | |
1293 | case FASTRPC_IOCTL_ALLOC_DMA_BUFF: | |
1294 | err = fastrpc_dmabuf_alloc(fl, argp); | |
1295 | break; | |
c68cfb71 SK |
1296 | default: |
1297 | err = -ENOTTY; | |
1298 | break; | |
1299 | } | |
1300 | ||
1301 | return err; | |
1302 | } | |
1303 | ||
f6f9279f SK |
1304 | static const struct file_operations fastrpc_fops = { |
1305 | .open = fastrpc_device_open, | |
1306 | .release = fastrpc_device_release, | |
c68cfb71 SK |
1307 | .unlocked_ioctl = fastrpc_device_ioctl, |
1308 | .compat_ioctl = fastrpc_device_ioctl, | |
f6f9279f SK |
1309 | }; |
1310 | ||
1311 | static int fastrpc_cb_probe(struct platform_device *pdev) | |
1312 | { | |
1313 | struct fastrpc_channel_ctx *cctx; | |
1314 | struct fastrpc_session_ctx *sess; | |
1315 | struct device *dev = &pdev->dev; | |
1316 | int i, sessions = 0; | |
977e6c8d | 1317 | unsigned long flags; |
01b76c32 | 1318 | int rc; |
f6f9279f SK |
1319 | |
1320 | cctx = dev_get_drvdata(dev->parent); | |
1321 | if (!cctx) | |
1322 | return -EINVAL; | |
1323 | ||
1324 | of_property_read_u32(dev->of_node, "qcom,nsessions", &sessions); | |
1325 | ||
977e6c8d | 1326 | spin_lock_irqsave(&cctx->lock, flags); |
f6f9279f SK |
1327 | sess = &cctx->session[cctx->sesscount]; |
1328 | sess->used = false; | |
1329 | sess->valid = true; | |
1330 | sess->dev = dev; | |
1331 | dev_set_drvdata(dev, sess); | |
1332 | ||
1333 | if (of_property_read_u32(dev->of_node, "reg", &sess->sid)) | |
1334 | dev_info(dev, "FastRPC Session ID not specified in DT\n"); | |
1335 | ||
1336 | if (sessions > 0) { | |
1337 | struct fastrpc_session_ctx *dup_sess; | |
1338 | ||
1339 | for (i = 1; i < sessions; i++) { | |
1340 | if (cctx->sesscount++ >= FASTRPC_MAX_SESSIONS) | |
1341 | break; | |
1342 | dup_sess = &cctx->session[cctx->sesscount]; | |
1343 | memcpy(dup_sess, sess, sizeof(*dup_sess)); | |
1344 | } | |
1345 | } | |
1346 | cctx->sesscount++; | |
977e6c8d | 1347 | spin_unlock_irqrestore(&cctx->lock, flags); |
01b76c32 BY |
1348 | rc = dma_set_mask(dev, DMA_BIT_MASK(32)); |
1349 | if (rc) { | |
1350 | dev_err(dev, "32-bit DMA enable failed\n"); | |
1351 | return rc; | |
1352 | } | |
f6f9279f SK |
1353 | |
1354 | return 0; | |
1355 | } | |
1356 | ||
1357 | static int fastrpc_cb_remove(struct platform_device *pdev) | |
1358 | { | |
1359 | struct fastrpc_channel_ctx *cctx = dev_get_drvdata(pdev->dev.parent); | |
1360 | struct fastrpc_session_ctx *sess = dev_get_drvdata(&pdev->dev); | |
977e6c8d | 1361 | unsigned long flags; |
f6f9279f SK |
1362 | int i; |
1363 | ||
977e6c8d | 1364 | spin_lock_irqsave(&cctx->lock, flags); |
f6f9279f SK |
1365 | for (i = 1; i < FASTRPC_MAX_SESSIONS; i++) { |
1366 | if (cctx->session[i].sid == sess->sid) { | |
1367 | cctx->session[i].valid = false; | |
1368 | cctx->sesscount--; | |
1369 | } | |
1370 | } | |
977e6c8d | 1371 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f SK |
1372 | |
1373 | return 0; | |
1374 | } | |
1375 | ||
1376 | static const struct of_device_id fastrpc_match_table[] = { | |
1377 | { .compatible = "qcom,fastrpc-compute-cb", }, | |
1378 | {} | |
1379 | }; | |
1380 | ||
1381 | static struct platform_driver fastrpc_cb_driver = { | |
1382 | .probe = fastrpc_cb_probe, | |
1383 | .remove = fastrpc_cb_remove, | |
1384 | .driver = { | |
1385 | .name = "qcom,fastrpc-cb", | |
1386 | .of_match_table = fastrpc_match_table, | |
1387 | .suppress_bind_attrs = true, | |
1388 | }, | |
1389 | }; | |
1390 | ||
1391 | static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev) | |
1392 | { | |
1393 | struct device *rdev = &rpdev->dev; | |
1394 | struct fastrpc_channel_ctx *data; | |
1395 | int i, err, domain_id = -1; | |
1396 | const char *domain; | |
1397 | ||
1398 | data = devm_kzalloc(rdev, sizeof(*data), GFP_KERNEL); | |
1399 | if (!data) | |
1400 | return -ENOMEM; | |
1401 | ||
1402 | err = of_property_read_string(rdev->of_node, "label", &domain); | |
1403 | if (err) { | |
1404 | dev_info(rdev, "FastRPC Domain not specified in DT\n"); | |
1405 | return err; | |
1406 | } | |
1407 | ||
1408 | for (i = 0; i <= CDSP_DOMAIN_ID; i++) { | |
1409 | if (!strcmp(domains[i], domain)) { | |
1410 | domain_id = i; | |
1411 | break; | |
1412 | } | |
1413 | } | |
1414 | ||
1415 | if (domain_id < 0) { | |
1416 | dev_info(rdev, "FastRPC Invalid Domain ID %d\n", domain_id); | |
1417 | return -EINVAL; | |
1418 | } | |
1419 | ||
1420 | data->miscdev.minor = MISC_DYNAMIC_MINOR; | |
1421 | data->miscdev.name = kasprintf(GFP_KERNEL, "fastrpc-%s", | |
1422 | domains[domain_id]); | |
1423 | data->miscdev.fops = &fastrpc_fops; | |
1424 | err = misc_register(&data->miscdev); | |
1425 | if (err) | |
1426 | return err; | |
1427 | ||
1428 | dev_set_drvdata(&rpdev->dev, data); | |
1429 | dma_set_mask_and_coherent(rdev, DMA_BIT_MASK(32)); | |
1430 | INIT_LIST_HEAD(&data->users); | |
1431 | spin_lock_init(&data->lock); | |
1432 | idr_init(&data->ctx_idr); | |
1433 | data->domain_id = domain_id; | |
1434 | data->rpdev = rpdev; | |
1435 | ||
1436 | return of_platform_populate(rdev->of_node, NULL, NULL, rdev); | |
1437 | } | |
1438 | ||
c68cfb71 SK |
1439 | static void fastrpc_notify_users(struct fastrpc_user *user) |
1440 | { | |
1441 | struct fastrpc_invoke_ctx *ctx; | |
1442 | ||
1443 | spin_lock(&user->lock); | |
1444 | list_for_each_entry(ctx, &user->pending, node) | |
1445 | complete(&ctx->work); | |
1446 | spin_unlock(&user->lock); | |
1447 | } | |
1448 | ||
f6f9279f SK |
1449 | static void fastrpc_rpmsg_remove(struct rpmsg_device *rpdev) |
1450 | { | |
1451 | struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); | |
c68cfb71 | 1452 | struct fastrpc_user *user; |
977e6c8d | 1453 | unsigned long flags; |
c68cfb71 | 1454 | |
977e6c8d | 1455 | spin_lock_irqsave(&cctx->lock, flags); |
c68cfb71 SK |
1456 | list_for_each_entry(user, &cctx->users, user) |
1457 | fastrpc_notify_users(user); | |
977e6c8d | 1458 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f SK |
1459 | |
1460 | misc_deregister(&cctx->miscdev); | |
1461 | of_platform_depopulate(&rpdev->dev); | |
1462 | kfree(cctx); | |
1463 | } | |
1464 | ||
1465 | static int fastrpc_rpmsg_callback(struct rpmsg_device *rpdev, void *data, | |
1466 | int len, void *priv, u32 addr) | |
1467 | { | |
c68cfb71 SK |
1468 | struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); |
1469 | struct fastrpc_invoke_rsp *rsp = data; | |
1470 | struct fastrpc_invoke_ctx *ctx; | |
1471 | unsigned long flags; | |
1472 | unsigned long ctxid; | |
1473 | ||
1474 | if (len < sizeof(*rsp)) | |
1475 | return -EINVAL; | |
1476 | ||
1477 | ctxid = ((rsp->ctx & FASTRPC_CTXID_MASK) >> 4); | |
1478 | ||
1479 | spin_lock_irqsave(&cctx->lock, flags); | |
1480 | ctx = idr_find(&cctx->ctx_idr, ctxid); | |
1481 | spin_unlock_irqrestore(&cctx->lock, flags); | |
1482 | ||
1483 | if (!ctx) { | |
1484 | dev_err(&rpdev->dev, "No context ID matches response\n"); | |
1485 | return -ENOENT; | |
1486 | } | |
1487 | ||
1488 | ctx->retval = rsp->retval; | |
1489 | complete(&ctx->work); | |
8e7389c7 TE |
1490 | |
1491 | /* | |
1492 | * The DMA buffer associated with the context cannot be freed in | |
1493 | * interrupt context so schedule it through a worker thread to | |
1494 | * avoid a kernel BUG. | |
1495 | */ | |
1496 | schedule_work(&ctx->put_work); | |
c68cfb71 | 1497 | |
f6f9279f SK |
1498 | return 0; |
1499 | } | |
1500 | ||
1501 | static const struct of_device_id fastrpc_rpmsg_of_match[] = { | |
1502 | { .compatible = "qcom,fastrpc" }, | |
1503 | { }, | |
1504 | }; | |
1505 | MODULE_DEVICE_TABLE(of, fastrpc_rpmsg_of_match); | |
1506 | ||
1507 | static struct rpmsg_driver fastrpc_driver = { | |
1508 | .probe = fastrpc_rpmsg_probe, | |
1509 | .remove = fastrpc_rpmsg_remove, | |
1510 | .callback = fastrpc_rpmsg_callback, | |
1511 | .drv = { | |
1512 | .name = "qcom,fastrpc", | |
1513 | .of_match_table = fastrpc_rpmsg_of_match, | |
1514 | }, | |
1515 | }; | |
1516 | ||
1517 | static int fastrpc_init(void) | |
1518 | { | |
1519 | int ret; | |
1520 | ||
1521 | ret = platform_driver_register(&fastrpc_cb_driver); | |
1522 | if (ret < 0) { | |
1523 | pr_err("fastrpc: failed to register cb driver\n"); | |
1524 | return ret; | |
1525 | } | |
1526 | ||
1527 | ret = register_rpmsg_driver(&fastrpc_driver); | |
1528 | if (ret < 0) { | |
1529 | pr_err("fastrpc: failed to register rpmsg driver\n"); | |
1530 | platform_driver_unregister(&fastrpc_cb_driver); | |
1531 | return ret; | |
1532 | } | |
1533 | ||
1534 | return 0; | |
1535 | } | |
1536 | module_init(fastrpc_init); | |
1537 | ||
1538 | static void fastrpc_exit(void) | |
1539 | { | |
1540 | platform_driver_unregister(&fastrpc_cb_driver); | |
1541 | unregister_rpmsg_driver(&fastrpc_driver); | |
1542 | } | |
1543 | module_exit(fastrpc_exit); | |
1544 | ||
1545 | MODULE_LICENSE("GPL v2"); |