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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); | |
41db5f83 JRO |
282 | if (!buf->virt) { |
283 | mutex_destroy(&buf->lock); | |
284 | kfree(buf); | |
c68cfb71 | 285 | return -ENOMEM; |
41db5f83 | 286 | } |
c68cfb71 SK |
287 | |
288 | if (fl->sctx && fl->sctx->sid) | |
289 | buf->phys += ((u64)fl->sctx->sid << 32); | |
290 | ||
291 | *obuf = buf; | |
292 | ||
293 | return 0; | |
294 | } | |
295 | ||
296 | static void fastrpc_context_free(struct kref *ref) | |
297 | { | |
298 | struct fastrpc_invoke_ctx *ctx; | |
299 | struct fastrpc_channel_ctx *cctx; | |
977e6c8d | 300 | unsigned long flags; |
c68cfb71 SK |
301 | int i; |
302 | ||
303 | ctx = container_of(ref, struct fastrpc_invoke_ctx, refcount); | |
304 | cctx = ctx->cctx; | |
305 | ||
306 | for (i = 0; i < ctx->nscalars; i++) | |
307 | fastrpc_map_put(ctx->maps[i]); | |
308 | ||
309 | if (ctx->buf) | |
310 | fastrpc_buf_free(ctx->buf); | |
311 | ||
977e6c8d | 312 | spin_lock_irqsave(&cctx->lock, flags); |
c68cfb71 | 313 | idr_remove(&cctx->ctx_idr, ctx->ctxid >> 4); |
977e6c8d | 314 | spin_unlock_irqrestore(&cctx->lock, flags); |
c68cfb71 SK |
315 | |
316 | kfree(ctx->maps); | |
25e8dfb8 | 317 | kfree(ctx->olaps); |
c68cfb71 SK |
318 | kfree(ctx); |
319 | } | |
320 | ||
321 | static void fastrpc_context_get(struct fastrpc_invoke_ctx *ctx) | |
322 | { | |
323 | kref_get(&ctx->refcount); | |
324 | } | |
325 | ||
326 | static void fastrpc_context_put(struct fastrpc_invoke_ctx *ctx) | |
327 | { | |
328 | kref_put(&ctx->refcount, fastrpc_context_free); | |
329 | } | |
330 | ||
8e7389c7 TE |
331 | static void fastrpc_context_put_wq(struct work_struct *work) |
332 | { | |
333 | struct fastrpc_invoke_ctx *ctx = | |
334 | container_of(work, struct fastrpc_invoke_ctx, put_work); | |
335 | ||
336 | fastrpc_context_put(ctx); | |
337 | } | |
338 | ||
25e8dfb8 SK |
339 | #define CMP(aa, bb) ((aa) == (bb) ? 0 : (aa) < (bb) ? -1 : 1) |
340 | static int olaps_cmp(const void *a, const void *b) | |
341 | { | |
342 | struct fastrpc_buf_overlap *pa = (struct fastrpc_buf_overlap *)a; | |
343 | struct fastrpc_buf_overlap *pb = (struct fastrpc_buf_overlap *)b; | |
344 | /* sort with lowest starting buffer first */ | |
345 | int st = CMP(pa->start, pb->start); | |
346 | /* sort with highest ending buffer first */ | |
347 | int ed = CMP(pb->end, pa->end); | |
348 | ||
349 | return st == 0 ? ed : st; | |
350 | } | |
351 | ||
352 | static void fastrpc_get_buff_overlaps(struct fastrpc_invoke_ctx *ctx) | |
353 | { | |
354 | u64 max_end = 0; | |
355 | int i; | |
356 | ||
357 | for (i = 0; i < ctx->nbufs; ++i) { | |
358 | ctx->olaps[i].start = ctx->args[i].ptr; | |
359 | ctx->olaps[i].end = ctx->olaps[i].start + ctx->args[i].length; | |
360 | ctx->olaps[i].raix = i; | |
361 | } | |
362 | ||
363 | sort(ctx->olaps, ctx->nbufs, sizeof(*ctx->olaps), olaps_cmp, NULL); | |
364 | ||
365 | for (i = 0; i < ctx->nbufs; ++i) { | |
366 | /* Falling inside previous range */ | |
367 | if (ctx->olaps[i].start < max_end) { | |
368 | ctx->olaps[i].mstart = max_end; | |
369 | ctx->olaps[i].mend = ctx->olaps[i].end; | |
370 | ctx->olaps[i].offset = max_end - ctx->olaps[i].start; | |
371 | ||
372 | if (ctx->olaps[i].end > max_end) { | |
373 | max_end = ctx->olaps[i].end; | |
374 | } else { | |
375 | ctx->olaps[i].mend = 0; | |
376 | ctx->olaps[i].mstart = 0; | |
377 | } | |
378 | ||
379 | } else { | |
380 | ctx->olaps[i].mend = ctx->olaps[i].end; | |
381 | ctx->olaps[i].mstart = ctx->olaps[i].start; | |
382 | ctx->olaps[i].offset = 0; | |
383 | max_end = ctx->olaps[i].end; | |
384 | } | |
385 | } | |
386 | } | |
387 | ||
c68cfb71 SK |
388 | static struct fastrpc_invoke_ctx *fastrpc_context_alloc( |
389 | struct fastrpc_user *user, u32 kernel, u32 sc, | |
390 | struct fastrpc_invoke_args *args) | |
391 | { | |
392 | struct fastrpc_channel_ctx *cctx = user->cctx; | |
393 | struct fastrpc_invoke_ctx *ctx = NULL; | |
977e6c8d | 394 | unsigned long flags; |
c68cfb71 SK |
395 | int ret; |
396 | ||
397 | ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); | |
398 | if (!ctx) | |
399 | return ERR_PTR(-ENOMEM); | |
400 | ||
401 | INIT_LIST_HEAD(&ctx->node); | |
402 | ctx->fl = user; | |
403 | ctx->nscalars = REMOTE_SCALARS_LENGTH(sc); | |
404 | ctx->nbufs = REMOTE_SCALARS_INBUFS(sc) + | |
405 | REMOTE_SCALARS_OUTBUFS(sc); | |
406 | ||
407 | if (ctx->nscalars) { | |
408 | ctx->maps = kcalloc(ctx->nscalars, | |
409 | sizeof(*ctx->maps), GFP_KERNEL); | |
410 | if (!ctx->maps) { | |
411 | kfree(ctx); | |
412 | return ERR_PTR(-ENOMEM); | |
413 | } | |
25e8dfb8 SK |
414 | ctx->olaps = kcalloc(ctx->nscalars, |
415 | sizeof(*ctx->olaps), GFP_KERNEL); | |
416 | if (!ctx->olaps) { | |
417 | kfree(ctx->maps); | |
418 | kfree(ctx); | |
419 | return ERR_PTR(-ENOMEM); | |
420 | } | |
c68cfb71 | 421 | ctx->args = args; |
25e8dfb8 | 422 | fastrpc_get_buff_overlaps(ctx); |
c68cfb71 SK |
423 | } |
424 | ||
425 | ctx->sc = sc; | |
426 | ctx->retval = -1; | |
427 | ctx->pid = current->pid; | |
428 | ctx->tgid = user->tgid; | |
429 | ctx->cctx = cctx; | |
430 | init_completion(&ctx->work); | |
8e7389c7 | 431 | INIT_WORK(&ctx->put_work, fastrpc_context_put_wq); |
c68cfb71 SK |
432 | |
433 | spin_lock(&user->lock); | |
434 | list_add_tail(&ctx->node, &user->pending); | |
435 | spin_unlock(&user->lock); | |
436 | ||
977e6c8d | 437 | spin_lock_irqsave(&cctx->lock, flags); |
c68cfb71 SK |
438 | ret = idr_alloc_cyclic(&cctx->ctx_idr, ctx, 1, |
439 | FASTRPC_CTX_MAX, GFP_ATOMIC); | |
440 | if (ret < 0) { | |
977e6c8d | 441 | spin_unlock_irqrestore(&cctx->lock, flags); |
c68cfb71 SK |
442 | goto err_idr; |
443 | } | |
444 | ctx->ctxid = ret << 4; | |
977e6c8d | 445 | spin_unlock_irqrestore(&cctx->lock, flags); |
c68cfb71 SK |
446 | |
447 | kref_init(&ctx->refcount); | |
448 | ||
449 | return ctx; | |
450 | err_idr: | |
451 | spin_lock(&user->lock); | |
452 | list_del(&ctx->node); | |
453 | spin_unlock(&user->lock); | |
454 | kfree(ctx->maps); | |
25e8dfb8 | 455 | kfree(ctx->olaps); |
c68cfb71 SK |
456 | kfree(ctx); |
457 | ||
458 | return ERR_PTR(ret); | |
459 | } | |
460 | ||
6cffd795 SK |
461 | static struct sg_table * |
462 | fastrpc_map_dma_buf(struct dma_buf_attachment *attachment, | |
463 | enum dma_data_direction dir) | |
464 | { | |
465 | struct fastrpc_dma_buf_attachment *a = attachment->priv; | |
466 | struct sg_table *table; | |
467 | ||
468 | table = &a->sgt; | |
469 | ||
470 | if (!dma_map_sg(attachment->dev, table->sgl, table->nents, dir)) | |
471 | return ERR_PTR(-ENOMEM); | |
472 | ||
473 | return table; | |
474 | } | |
475 | ||
476 | static void fastrpc_unmap_dma_buf(struct dma_buf_attachment *attach, | |
477 | struct sg_table *table, | |
478 | enum dma_data_direction dir) | |
479 | { | |
480 | dma_unmap_sg(attach->dev, table->sgl, table->nents, dir); | |
481 | } | |
482 | ||
483 | static void fastrpc_release(struct dma_buf *dmabuf) | |
484 | { | |
485 | struct fastrpc_buf *buffer = dmabuf->priv; | |
486 | ||
487 | fastrpc_buf_free(buffer); | |
488 | } | |
489 | ||
490 | static int fastrpc_dma_buf_attach(struct dma_buf *dmabuf, | |
491 | struct dma_buf_attachment *attachment) | |
492 | { | |
493 | struct fastrpc_dma_buf_attachment *a; | |
494 | struct fastrpc_buf *buffer = dmabuf->priv; | |
495 | int ret; | |
496 | ||
497 | a = kzalloc(sizeof(*a), GFP_KERNEL); | |
498 | if (!a) | |
499 | return -ENOMEM; | |
500 | ||
501 | ret = dma_get_sgtable(buffer->dev, &a->sgt, buffer->virt, | |
502 | FASTRPC_PHYS(buffer->phys), buffer->size); | |
503 | if (ret < 0) { | |
504 | dev_err(buffer->dev, "failed to get scatterlist from DMA API\n"); | |
505 | return -EINVAL; | |
506 | } | |
507 | ||
508 | a->dev = attachment->dev; | |
509 | INIT_LIST_HEAD(&a->node); | |
510 | attachment->priv = a; | |
511 | ||
512 | mutex_lock(&buffer->lock); | |
513 | list_add(&a->node, &buffer->attachments); | |
514 | mutex_unlock(&buffer->lock); | |
515 | ||
516 | return 0; | |
517 | } | |
518 | ||
519 | static void fastrpc_dma_buf_detatch(struct dma_buf *dmabuf, | |
520 | struct dma_buf_attachment *attachment) | |
521 | { | |
522 | struct fastrpc_dma_buf_attachment *a = attachment->priv; | |
523 | struct fastrpc_buf *buffer = dmabuf->priv; | |
524 | ||
525 | mutex_lock(&buffer->lock); | |
526 | list_del(&a->node); | |
527 | mutex_unlock(&buffer->lock); | |
528 | kfree(a); | |
529 | } | |
530 | ||
531 | static void *fastrpc_kmap(struct dma_buf *dmabuf, unsigned long pgnum) | |
532 | { | |
533 | struct fastrpc_buf *buf = dmabuf->priv; | |
534 | ||
535 | return buf->virt ? buf->virt + pgnum * PAGE_SIZE : NULL; | |
536 | } | |
537 | ||
538 | static void *fastrpc_vmap(struct dma_buf *dmabuf) | |
539 | { | |
540 | struct fastrpc_buf *buf = dmabuf->priv; | |
541 | ||
542 | return buf->virt; | |
543 | } | |
544 | ||
545 | static int fastrpc_mmap(struct dma_buf *dmabuf, | |
546 | struct vm_area_struct *vma) | |
547 | { | |
548 | struct fastrpc_buf *buf = dmabuf->priv; | |
549 | size_t size = vma->vm_end - vma->vm_start; | |
550 | ||
551 | return dma_mmap_coherent(buf->dev, vma, buf->virt, | |
552 | FASTRPC_PHYS(buf->phys), size); | |
553 | } | |
554 | ||
555 | static const struct dma_buf_ops fastrpc_dma_buf_ops = { | |
556 | .attach = fastrpc_dma_buf_attach, | |
557 | .detach = fastrpc_dma_buf_detatch, | |
558 | .map_dma_buf = fastrpc_map_dma_buf, | |
559 | .unmap_dma_buf = fastrpc_unmap_dma_buf, | |
560 | .mmap = fastrpc_mmap, | |
561 | .map = fastrpc_kmap, | |
562 | .vmap = fastrpc_vmap, | |
563 | .release = fastrpc_release, | |
564 | }; | |
565 | ||
c68cfb71 SK |
566 | static int fastrpc_map_create(struct fastrpc_user *fl, int fd, |
567 | u64 len, struct fastrpc_map **ppmap) | |
568 | { | |
569 | struct fastrpc_session_ctx *sess = fl->sctx; | |
570 | struct fastrpc_map *map = NULL; | |
571 | int err = 0; | |
572 | ||
573 | if (!fastrpc_map_find(fl, fd, ppmap)) | |
574 | return 0; | |
575 | ||
576 | map = kzalloc(sizeof(*map), GFP_KERNEL); | |
577 | if (!map) | |
578 | return -ENOMEM; | |
579 | ||
580 | INIT_LIST_HEAD(&map->node); | |
581 | map->fl = fl; | |
582 | map->fd = fd; | |
583 | map->buf = dma_buf_get(fd); | |
682a6044 WY |
584 | if (IS_ERR(map->buf)) { |
585 | err = PTR_ERR(map->buf); | |
c68cfb71 SK |
586 | goto get_err; |
587 | } | |
588 | ||
589 | map->attach = dma_buf_attach(map->buf, sess->dev); | |
590 | if (IS_ERR(map->attach)) { | |
591 | dev_err(sess->dev, "Failed to attach dmabuf\n"); | |
592 | err = PTR_ERR(map->attach); | |
593 | goto attach_err; | |
594 | } | |
595 | ||
596 | map->table = dma_buf_map_attachment(map->attach, DMA_BIDIRECTIONAL); | |
597 | if (IS_ERR(map->table)) { | |
598 | err = PTR_ERR(map->table); | |
599 | goto map_err; | |
600 | } | |
601 | ||
602 | map->phys = sg_dma_address(map->table->sgl); | |
603 | map->phys += ((u64)fl->sctx->sid << 32); | |
604 | map->size = len; | |
605 | map->va = sg_virt(map->table->sgl); | |
606 | map->len = len; | |
607 | kref_init(&map->refcount); | |
608 | ||
609 | spin_lock(&fl->lock); | |
610 | list_add_tail(&map->node, &fl->maps); | |
611 | spin_unlock(&fl->lock); | |
612 | *ppmap = map; | |
613 | ||
614 | return 0; | |
615 | ||
616 | map_err: | |
617 | dma_buf_detach(map->buf, map->attach); | |
618 | attach_err: | |
619 | dma_buf_put(map->buf); | |
620 | get_err: | |
621 | kfree(map); | |
622 | ||
623 | return err; | |
624 | } | |
625 | ||
626 | /* | |
627 | * Fastrpc payload buffer with metadata looks like: | |
628 | * | |
629 | * >>>>>> START of METADATA <<<<<<<<< | |
630 | * +---------------------------------+ | |
631 | * | Arguments | | |
632 | * | type:(struct fastrpc_remote_arg)| | |
633 | * | (0 - N) | | |
634 | * +---------------------------------+ | |
635 | * | Invoke Buffer list | | |
636 | * | type:(struct fastrpc_invoke_buf)| | |
637 | * | (0 - N) | | |
638 | * +---------------------------------+ | |
639 | * | Page info list | | |
640 | * | type:(struct fastrpc_phy_page) | | |
641 | * | (0 - N) | | |
642 | * +---------------------------------+ | |
643 | * | Optional info | | |
644 | * |(can be specific to SoC/Firmware)| | |
645 | * +---------------------------------+ | |
646 | * >>>>>>>> END of METADATA <<<<<<<<< | |
647 | * +---------------------------------+ | |
648 | * | Inline ARGS | | |
649 | * | (0-N) | | |
650 | * +---------------------------------+ | |
651 | */ | |
652 | ||
653 | static int fastrpc_get_meta_size(struct fastrpc_invoke_ctx *ctx) | |
654 | { | |
655 | int size = 0; | |
656 | ||
657 | size = (sizeof(struct fastrpc_remote_arg) + | |
658 | sizeof(struct fastrpc_invoke_buf) + | |
659 | sizeof(struct fastrpc_phy_page)) * ctx->nscalars + | |
660 | sizeof(u64) * FASTRPC_MAX_FDLIST + | |
661 | sizeof(u32) * FASTRPC_MAX_CRCLIST; | |
662 | ||
663 | return size; | |
664 | } | |
665 | ||
666 | static u64 fastrpc_get_payload_size(struct fastrpc_invoke_ctx *ctx, int metalen) | |
667 | { | |
668 | u64 size = 0; | |
669 | int i; | |
670 | ||
671 | size = ALIGN(metalen, FASTRPC_ALIGN); | |
672 | for (i = 0; i < ctx->nscalars; i++) { | |
673 | if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1) { | |
25e8dfb8 SK |
674 | |
675 | if (ctx->olaps[i].offset == 0) | |
676 | size = ALIGN(size, FASTRPC_ALIGN); | |
677 | ||
678 | size += (ctx->olaps[i].mend - ctx->olaps[i].mstart); | |
c68cfb71 SK |
679 | } |
680 | } | |
681 | ||
682 | return size; | |
683 | } | |
684 | ||
685 | static int fastrpc_create_maps(struct fastrpc_invoke_ctx *ctx) | |
686 | { | |
687 | struct device *dev = ctx->fl->sctx->dev; | |
688 | int i, err; | |
689 | ||
690 | for (i = 0; i < ctx->nscalars; ++i) { | |
691 | /* Make sure reserved field is set to 0 */ | |
692 | if (ctx->args[i].reserved) | |
693 | return -EINVAL; | |
694 | ||
695 | if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1 || | |
696 | ctx->args[i].length == 0) | |
697 | continue; | |
698 | ||
699 | err = fastrpc_map_create(ctx->fl, ctx->args[i].fd, | |
700 | ctx->args[i].length, &ctx->maps[i]); | |
701 | if (err) { | |
702 | dev_err(dev, "Error Creating map %d\n", err); | |
703 | return -EINVAL; | |
704 | } | |
705 | ||
706 | } | |
707 | return 0; | |
708 | } | |
709 | ||
710 | static int fastrpc_get_args(u32 kernel, struct fastrpc_invoke_ctx *ctx) | |
711 | { | |
712 | struct device *dev = ctx->fl->sctx->dev; | |
713 | struct fastrpc_remote_arg *rpra; | |
714 | struct fastrpc_invoke_buf *list; | |
715 | struct fastrpc_phy_page *pages; | |
25e8dfb8 SK |
716 | int inbufs, i, oix, err = 0; |
717 | u64 len, rlen, pkt_size; | |
02b45b47 | 718 | u64 pg_start, pg_end; |
c68cfb71 SK |
719 | uintptr_t args; |
720 | int metalen; | |
721 | ||
c68cfb71 SK |
722 | inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); |
723 | metalen = fastrpc_get_meta_size(ctx); | |
724 | pkt_size = fastrpc_get_payload_size(ctx, metalen); | |
725 | ||
726 | err = fastrpc_create_maps(ctx); | |
727 | if (err) | |
728 | return err; | |
729 | ||
730 | ctx->msg_sz = pkt_size; | |
731 | ||
732 | err = fastrpc_buf_alloc(ctx->fl, dev, pkt_size, &ctx->buf); | |
733 | if (err) | |
734 | return err; | |
735 | ||
736 | rpra = ctx->buf->virt; | |
737 | list = ctx->buf->virt + ctx->nscalars * sizeof(*rpra); | |
738 | pages = ctx->buf->virt + ctx->nscalars * (sizeof(*list) + | |
739 | sizeof(*rpra)); | |
740 | args = (uintptr_t)ctx->buf->virt + metalen; | |
741 | rlen = pkt_size - metalen; | |
742 | ctx->rpra = rpra; | |
743 | ||
25e8dfb8 SK |
744 | for (oix = 0; oix < ctx->nbufs; ++oix) { |
745 | int mlen; | |
746 | ||
747 | i = ctx->olaps[oix].raix; | |
748 | len = ctx->args[i].length; | |
c68cfb71 SK |
749 | |
750 | rpra[i].pv = 0; | |
751 | rpra[i].len = len; | |
752 | list[i].num = len ? 1 : 0; | |
753 | list[i].pgidx = i; | |
754 | ||
755 | if (!len) | |
756 | continue; | |
757 | ||
c68cfb71 | 758 | if (ctx->maps[i]) { |
80f3afd7 SK |
759 | struct vm_area_struct *vma = NULL; |
760 | ||
c68cfb71 SK |
761 | rpra[i].pv = (u64) ctx->args[i].ptr; |
762 | pages[i].addr = ctx->maps[i]->phys; | |
80f3afd7 SK |
763 | |
764 | vma = find_vma(current->mm, ctx->args[i].ptr); | |
765 | if (vma) | |
766 | pages[i].addr += ctx->args[i].ptr - | |
767 | vma->vm_start; | |
768 | ||
02b45b47 SK |
769 | pg_start = (ctx->args[i].ptr & PAGE_MASK) >> PAGE_SHIFT; |
770 | pg_end = ((ctx->args[i].ptr + len - 1) & PAGE_MASK) >> | |
771 | PAGE_SHIFT; | |
772 | pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; | |
773 | ||
c68cfb71 | 774 | } else { |
25e8dfb8 SK |
775 | |
776 | if (ctx->olaps[oix].offset == 0) { | |
777 | rlen -= ALIGN(args, FASTRPC_ALIGN) - args; | |
778 | args = ALIGN(args, FASTRPC_ALIGN); | |
779 | } | |
780 | ||
781 | mlen = ctx->olaps[oix].mend - ctx->olaps[oix].mstart; | |
782 | ||
783 | if (rlen < mlen) | |
c68cfb71 SK |
784 | goto bail; |
785 | ||
25e8dfb8 SK |
786 | rpra[i].pv = args - ctx->olaps[oix].offset; |
787 | pages[i].addr = ctx->buf->phys - | |
788 | ctx->olaps[oix].offset + | |
789 | (pkt_size - rlen); | |
c68cfb71 | 790 | pages[i].addr = pages[i].addr & PAGE_MASK; |
25e8dfb8 | 791 | |
02b45b47 SK |
792 | pg_start = (args & PAGE_MASK) >> PAGE_SHIFT; |
793 | pg_end = ((args + len - 1) & PAGE_MASK) >> PAGE_SHIFT; | |
794 | pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; | |
25e8dfb8 SK |
795 | args = args + mlen; |
796 | rlen -= mlen; | |
c68cfb71 SK |
797 | } |
798 | ||
799 | if (i < inbufs && !ctx->maps[i]) { | |
800 | void *dst = (void *)(uintptr_t)rpra[i].pv; | |
801 | void *src = (void *)(uintptr_t)ctx->args[i].ptr; | |
802 | ||
803 | if (!kernel) { | |
804 | if (copy_from_user(dst, (void __user *)src, | |
805 | len)) { | |
806 | err = -EFAULT; | |
807 | goto bail; | |
808 | } | |
809 | } else { | |
810 | memcpy(dst, src, len); | |
811 | } | |
812 | } | |
813 | } | |
814 | ||
815 | for (i = ctx->nbufs; i < ctx->nscalars; ++i) { | |
816 | rpra[i].pv = (u64) ctx->args[i].ptr; | |
817 | rpra[i].len = ctx->args[i].length; | |
818 | list[i].num = ctx->args[i].length ? 1 : 0; | |
819 | list[i].pgidx = i; | |
820 | pages[i].addr = ctx->maps[i]->phys; | |
821 | pages[i].size = ctx->maps[i]->size; | |
822 | } | |
823 | ||
824 | bail: | |
825 | if (err) | |
826 | dev_err(dev, "Error: get invoke args failed:%d\n", err); | |
827 | ||
828 | return err; | |
829 | } | |
830 | ||
831 | static int fastrpc_put_args(struct fastrpc_invoke_ctx *ctx, | |
832 | u32 kernel) | |
833 | { | |
834 | struct fastrpc_remote_arg *rpra = ctx->rpra; | |
835 | int i, inbufs; | |
836 | ||
837 | inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); | |
838 | ||
839 | for (i = inbufs; i < ctx->nbufs; ++i) { | |
840 | void *src = (void *)(uintptr_t)rpra[i].pv; | |
841 | void *dst = (void *)(uintptr_t)ctx->args[i].ptr; | |
842 | u64 len = rpra[i].len; | |
843 | ||
844 | if (!kernel) { | |
845 | if (copy_to_user((void __user *)dst, src, len)) | |
846 | return -EFAULT; | |
847 | } else { | |
848 | memcpy(dst, src, len); | |
849 | } | |
850 | } | |
851 | ||
852 | return 0; | |
853 | } | |
854 | ||
855 | static int fastrpc_invoke_send(struct fastrpc_session_ctx *sctx, | |
856 | struct fastrpc_invoke_ctx *ctx, | |
857 | u32 kernel, uint32_t handle) | |
858 | { | |
859 | struct fastrpc_channel_ctx *cctx; | |
860 | struct fastrpc_user *fl = ctx->fl; | |
861 | struct fastrpc_msg *msg = &ctx->msg; | |
862 | ||
863 | cctx = fl->cctx; | |
864 | msg->pid = fl->tgid; | |
865 | msg->tid = current->pid; | |
866 | ||
867 | if (kernel) | |
868 | msg->pid = 0; | |
869 | ||
870 | msg->ctx = ctx->ctxid | fl->pd; | |
871 | msg->handle = handle; | |
872 | msg->sc = ctx->sc; | |
873 | msg->addr = ctx->buf ? ctx->buf->phys : 0; | |
874 | msg->size = roundup(ctx->msg_sz, PAGE_SIZE); | |
875 | fastrpc_context_get(ctx); | |
876 | ||
877 | return rpmsg_send(cctx->rpdev->ept, (void *)msg, sizeof(*msg)); | |
878 | } | |
879 | ||
880 | static int fastrpc_internal_invoke(struct fastrpc_user *fl, u32 kernel, | |
881 | u32 handle, u32 sc, | |
882 | struct fastrpc_invoke_args *args) | |
883 | { | |
884 | struct fastrpc_invoke_ctx *ctx = NULL; | |
885 | int err = 0; | |
886 | ||
887 | if (!fl->sctx) | |
888 | return -EINVAL; | |
889 | ||
890 | ctx = fastrpc_context_alloc(fl, kernel, sc, args); | |
891 | if (IS_ERR(ctx)) | |
892 | return PTR_ERR(ctx); | |
893 | ||
894 | if (ctx->nscalars) { | |
895 | err = fastrpc_get_args(kernel, ctx); | |
896 | if (err) | |
897 | goto bail; | |
898 | } | |
415a0729 SK |
899 | |
900 | /* make sure that all CPU memory writes are seen by DSP */ | |
901 | dma_wmb(); | |
c68cfb71 SK |
902 | /* Send invoke buffer to remote dsp */ |
903 | err = fastrpc_invoke_send(fl->sctx, ctx, kernel, handle); | |
904 | if (err) | |
905 | goto bail; | |
906 | ||
907 | /* Wait for remote dsp to respond or time out */ | |
908 | err = wait_for_completion_interruptible(&ctx->work); | |
909 | if (err) | |
910 | goto bail; | |
911 | ||
912 | /* Check the response from remote dsp */ | |
913 | err = ctx->retval; | |
914 | if (err) | |
915 | goto bail; | |
916 | ||
917 | if (ctx->nscalars) { | |
415a0729 SK |
918 | /* make sure that all memory writes by DSP are seen by CPU */ |
919 | dma_rmb(); | |
c68cfb71 SK |
920 | /* populate all the output buffers with results */ |
921 | err = fastrpc_put_args(ctx, kernel); | |
922 | if (err) | |
923 | goto bail; | |
924 | } | |
925 | ||
926 | bail: | |
927 | /* We are done with this compute context, remove it from pending list */ | |
928 | spin_lock(&fl->lock); | |
929 | list_del(&ctx->node); | |
930 | spin_unlock(&fl->lock); | |
931 | fastrpc_context_put(ctx); | |
932 | ||
933 | if (err) | |
934 | dev_dbg(fl->sctx->dev, "Error: Invoke Failed %d\n", err); | |
935 | ||
936 | return err; | |
937 | } | |
938 | ||
d73f71c7 SK |
939 | static int fastrpc_init_create_process(struct fastrpc_user *fl, |
940 | char __user *argp) | |
941 | { | |
942 | struct fastrpc_init_create init; | |
943 | struct fastrpc_invoke_args *args; | |
944 | struct fastrpc_phy_page pages[1]; | |
945 | struct fastrpc_map *map = NULL; | |
946 | struct fastrpc_buf *imem = NULL; | |
947 | int memlen; | |
948 | int err; | |
949 | struct { | |
950 | int pgid; | |
951 | u32 namelen; | |
952 | u32 filelen; | |
953 | u32 pageslen; | |
954 | u32 attrs; | |
955 | u32 siglen; | |
956 | } inbuf; | |
957 | u32 sc; | |
958 | ||
959 | args = kcalloc(FASTRPC_CREATE_PROCESS_NARGS, sizeof(*args), GFP_KERNEL); | |
960 | if (!args) | |
961 | return -ENOMEM; | |
962 | ||
963 | if (copy_from_user(&init, argp, sizeof(init))) { | |
964 | err = -EFAULT; | |
b49f6d83 | 965 | goto err; |
d73f71c7 SK |
966 | } |
967 | ||
968 | if (init.filelen > INIT_FILELEN_MAX) { | |
969 | err = -EINVAL; | |
b49f6d83 | 970 | goto err; |
d73f71c7 SK |
971 | } |
972 | ||
973 | inbuf.pgid = fl->tgid; | |
974 | inbuf.namelen = strlen(current->comm) + 1; | |
975 | inbuf.filelen = init.filelen; | |
976 | inbuf.pageslen = 1; | |
977 | inbuf.attrs = init.attrs; | |
978 | inbuf.siglen = init.siglen; | |
979 | fl->pd = 1; | |
980 | ||
981 | if (init.filelen && init.filefd) { | |
982 | err = fastrpc_map_create(fl, init.filefd, init.filelen, &map); | |
983 | if (err) | |
b49f6d83 | 984 | goto err; |
d73f71c7 SK |
985 | } |
986 | ||
987 | memlen = ALIGN(max(INIT_FILELEN_MAX, (int)init.filelen * 4), | |
988 | 1024 * 1024); | |
989 | err = fastrpc_buf_alloc(fl, fl->sctx->dev, memlen, | |
990 | &imem); | |
b49f6d83 TE |
991 | if (err) |
992 | goto err_alloc; | |
d73f71c7 SK |
993 | |
994 | fl->init_mem = imem; | |
995 | args[0].ptr = (u64)(uintptr_t)&inbuf; | |
996 | args[0].length = sizeof(inbuf); | |
997 | args[0].fd = -1; | |
998 | ||
999 | args[1].ptr = (u64)(uintptr_t)current->comm; | |
1000 | args[1].length = inbuf.namelen; | |
1001 | args[1].fd = -1; | |
1002 | ||
1003 | args[2].ptr = (u64) init.file; | |
1004 | args[2].length = inbuf.filelen; | |
1005 | args[2].fd = init.filefd; | |
1006 | ||
1007 | pages[0].addr = imem->phys; | |
1008 | pages[0].size = imem->size; | |
1009 | ||
1010 | args[3].ptr = (u64)(uintptr_t) pages; | |
1011 | args[3].length = 1 * sizeof(*pages); | |
1012 | args[3].fd = -1; | |
1013 | ||
1014 | args[4].ptr = (u64)(uintptr_t)&inbuf.attrs; | |
1015 | args[4].length = sizeof(inbuf.attrs); | |
1016 | args[4].fd = -1; | |
1017 | ||
1018 | args[5].ptr = (u64)(uintptr_t) &inbuf.siglen; | |
1019 | args[5].length = sizeof(inbuf.siglen); | |
1020 | args[5].fd = -1; | |
1021 | ||
1022 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE, 4, 0); | |
1023 | if (init.attrs) | |
1024 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE_ATTR, 6, 0); | |
1025 | ||
1026 | err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, | |
1027 | sc, args); | |
b49f6d83 TE |
1028 | if (err) |
1029 | goto err_invoke; | |
1030 | ||
1031 | kfree(args); | |
d73f71c7 | 1032 | |
b49f6d83 TE |
1033 | return 0; |
1034 | ||
1035 | err_invoke: | |
1036 | fl->init_mem = NULL; | |
1037 | fastrpc_buf_free(imem); | |
1038 | err_alloc: | |
1039 | if (map) { | |
1040 | spin_lock(&fl->lock); | |
1041 | list_del(&map->node); | |
1042 | spin_unlock(&fl->lock); | |
d73f71c7 | 1043 | fastrpc_map_put(map); |
d73f71c7 | 1044 | } |
b49f6d83 | 1045 | err: |
d73f71c7 SK |
1046 | kfree(args); |
1047 | ||
1048 | return err; | |
1049 | } | |
1050 | ||
f6f9279f SK |
1051 | static struct fastrpc_session_ctx *fastrpc_session_alloc( |
1052 | struct fastrpc_channel_ctx *cctx) | |
1053 | { | |
1054 | struct fastrpc_session_ctx *session = NULL; | |
977e6c8d | 1055 | unsigned long flags; |
f6f9279f SK |
1056 | int i; |
1057 | ||
977e6c8d | 1058 | spin_lock_irqsave(&cctx->lock, flags); |
f6f9279f SK |
1059 | for (i = 0; i < cctx->sesscount; i++) { |
1060 | if (!cctx->session[i].used && cctx->session[i].valid) { | |
1061 | cctx->session[i].used = true; | |
1062 | session = &cctx->session[i]; | |
1063 | break; | |
1064 | } | |
1065 | } | |
977e6c8d | 1066 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f SK |
1067 | |
1068 | return session; | |
1069 | } | |
1070 | ||
1071 | static void fastrpc_session_free(struct fastrpc_channel_ctx *cctx, | |
1072 | struct fastrpc_session_ctx *session) | |
1073 | { | |
977e6c8d SK |
1074 | unsigned long flags; |
1075 | ||
1076 | spin_lock_irqsave(&cctx->lock, flags); | |
f6f9279f | 1077 | session->used = false; |
977e6c8d | 1078 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f SK |
1079 | } |
1080 | ||
d73f71c7 SK |
1081 | static int fastrpc_release_current_dsp_process(struct fastrpc_user *fl) |
1082 | { | |
1083 | struct fastrpc_invoke_args args[1]; | |
1084 | int tgid = 0; | |
1085 | u32 sc; | |
1086 | ||
1087 | tgid = fl->tgid; | |
1088 | args[0].ptr = (u64)(uintptr_t) &tgid; | |
1089 | args[0].length = sizeof(tgid); | |
1090 | args[0].fd = -1; | |
1091 | args[0].reserved = 0; | |
1092 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_RELEASE, 1, 0); | |
1093 | ||
1094 | return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, | |
1095 | sc, &args[0]); | |
1096 | } | |
1097 | ||
f6f9279f SK |
1098 | static int fastrpc_device_release(struct inode *inode, struct file *file) |
1099 | { | |
1100 | struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; | |
1101 | struct fastrpc_channel_ctx *cctx = fl->cctx; | |
c68cfb71 SK |
1102 | struct fastrpc_invoke_ctx *ctx, *n; |
1103 | struct fastrpc_map *map, *m; | |
977e6c8d | 1104 | unsigned long flags; |
f6f9279f | 1105 | |
d73f71c7 SK |
1106 | fastrpc_release_current_dsp_process(fl); |
1107 | ||
977e6c8d | 1108 | spin_lock_irqsave(&cctx->lock, flags); |
f6f9279f | 1109 | list_del(&fl->user); |
977e6c8d | 1110 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f | 1111 | |
c68cfb71 SK |
1112 | if (fl->init_mem) |
1113 | fastrpc_buf_free(fl->init_mem); | |
1114 | ||
1115 | list_for_each_entry_safe(ctx, n, &fl->pending, node) { | |
1116 | list_del(&ctx->node); | |
1117 | fastrpc_context_put(ctx); | |
1118 | } | |
1119 | ||
1120 | list_for_each_entry_safe(map, m, &fl->maps, node) { | |
1121 | list_del(&map->node); | |
1122 | fastrpc_map_put(map); | |
1123 | } | |
1124 | ||
f6f9279f SK |
1125 | fastrpc_session_free(cctx, fl->sctx); |
1126 | ||
1127 | mutex_destroy(&fl->mutex); | |
1128 | kfree(fl); | |
1129 | file->private_data = NULL; | |
1130 | ||
1131 | return 0; | |
1132 | } | |
1133 | ||
1134 | static int fastrpc_device_open(struct inode *inode, struct file *filp) | |
1135 | { | |
1136 | struct fastrpc_channel_ctx *cctx = miscdev_to_cctx(filp->private_data); | |
1137 | struct fastrpc_user *fl = NULL; | |
977e6c8d | 1138 | unsigned long flags; |
f6f9279f SK |
1139 | |
1140 | fl = kzalloc(sizeof(*fl), GFP_KERNEL); | |
1141 | if (!fl) | |
1142 | return -ENOMEM; | |
1143 | ||
1144 | filp->private_data = fl; | |
1145 | spin_lock_init(&fl->lock); | |
1146 | mutex_init(&fl->mutex); | |
1147 | INIT_LIST_HEAD(&fl->pending); | |
1148 | INIT_LIST_HEAD(&fl->maps); | |
1149 | INIT_LIST_HEAD(&fl->user); | |
1150 | fl->tgid = current->tgid; | |
1151 | fl->cctx = cctx; | |
7c11df42 TE |
1152 | |
1153 | fl->sctx = fastrpc_session_alloc(cctx); | |
1154 | if (!fl->sctx) { | |
1155 | dev_err(&cctx->rpdev->dev, "No session available\n"); | |
1156 | mutex_destroy(&fl->mutex); | |
1157 | kfree(fl); | |
1158 | ||
1159 | return -EBUSY; | |
1160 | } | |
1161 | ||
977e6c8d | 1162 | spin_lock_irqsave(&cctx->lock, flags); |
f6f9279f | 1163 | list_add_tail(&fl->user, &cctx->users); |
977e6c8d | 1164 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f SK |
1165 | |
1166 | return 0; | |
1167 | } | |
1168 | ||
6cffd795 SK |
1169 | static int fastrpc_dmabuf_free(struct fastrpc_user *fl, char __user *argp) |
1170 | { | |
1171 | struct dma_buf *buf; | |
1172 | int info; | |
1173 | ||
1174 | if (copy_from_user(&info, argp, sizeof(info))) | |
1175 | return -EFAULT; | |
1176 | ||
1177 | buf = dma_buf_get(info); | |
1178 | if (IS_ERR_OR_NULL(buf)) | |
1179 | return -EINVAL; | |
1180 | /* | |
1181 | * one for the last get and other for the ALLOC_DMA_BUFF ioctl | |
1182 | */ | |
1183 | dma_buf_put(buf); | |
1184 | dma_buf_put(buf); | |
1185 | ||
1186 | return 0; | |
1187 | } | |
1188 | ||
1189 | static int fastrpc_dmabuf_alloc(struct fastrpc_user *fl, char __user *argp) | |
1190 | { | |
1191 | struct fastrpc_alloc_dma_buf bp; | |
1192 | DEFINE_DMA_BUF_EXPORT_INFO(exp_info); | |
1193 | struct fastrpc_buf *buf = NULL; | |
1194 | int err; | |
1195 | ||
1196 | if (copy_from_user(&bp, argp, sizeof(bp))) | |
1197 | return -EFAULT; | |
1198 | ||
1199 | err = fastrpc_buf_alloc(fl, fl->sctx->dev, bp.size, &buf); | |
1200 | if (err) | |
1201 | return err; | |
1202 | exp_info.ops = &fastrpc_dma_buf_ops; | |
1203 | exp_info.size = bp.size; | |
1204 | exp_info.flags = O_RDWR; | |
1205 | exp_info.priv = buf; | |
1206 | buf->dmabuf = dma_buf_export(&exp_info); | |
1207 | if (IS_ERR(buf->dmabuf)) { | |
1208 | err = PTR_ERR(buf->dmabuf); | |
1209 | fastrpc_buf_free(buf); | |
1210 | return err; | |
1211 | } | |
1212 | ||
1213 | bp.fd = dma_buf_fd(buf->dmabuf, O_ACCMODE); | |
1214 | if (bp.fd < 0) { | |
1215 | dma_buf_put(buf->dmabuf); | |
1216 | return -EINVAL; | |
1217 | } | |
1218 | ||
1219 | if (copy_to_user(argp, &bp, sizeof(bp))) { | |
1220 | dma_buf_put(buf->dmabuf); | |
1221 | return -EFAULT; | |
1222 | } | |
1223 | ||
1224 | get_dma_buf(buf->dmabuf); | |
1225 | ||
1226 | return 0; | |
1227 | } | |
1228 | ||
d73f71c7 SK |
1229 | static int fastrpc_init_attach(struct fastrpc_user *fl) |
1230 | { | |
1231 | struct fastrpc_invoke_args args[1]; | |
1232 | int tgid = fl->tgid; | |
1233 | u32 sc; | |
1234 | ||
1235 | args[0].ptr = (u64)(uintptr_t) &tgid; | |
1236 | args[0].length = sizeof(tgid); | |
1237 | args[0].fd = -1; | |
1238 | args[0].reserved = 0; | |
1239 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_ATTACH, 1, 0); | |
1240 | fl->pd = 0; | |
1241 | ||
1242 | return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, | |
1243 | sc, &args[0]); | |
1244 | } | |
1245 | ||
c68cfb71 SK |
1246 | static int fastrpc_invoke(struct fastrpc_user *fl, char __user *argp) |
1247 | { | |
1248 | struct fastrpc_invoke_args *args = NULL; | |
1249 | struct fastrpc_invoke inv; | |
1250 | u32 nscalars; | |
1251 | int err; | |
1252 | ||
1253 | if (copy_from_user(&inv, argp, sizeof(inv))) | |
1254 | return -EFAULT; | |
1255 | ||
1256 | /* nscalars is truncated here to max supported value */ | |
1257 | nscalars = REMOTE_SCALARS_LENGTH(inv.sc); | |
1258 | if (nscalars) { | |
1259 | args = kcalloc(nscalars, sizeof(*args), GFP_KERNEL); | |
1260 | if (!args) | |
1261 | return -ENOMEM; | |
1262 | ||
1263 | if (copy_from_user(args, (void __user *)(uintptr_t)inv.args, | |
1264 | nscalars * sizeof(*args))) { | |
1265 | kfree(args); | |
1266 | return -EFAULT; | |
1267 | } | |
1268 | } | |
1269 | ||
1270 | err = fastrpc_internal_invoke(fl, false, inv.handle, inv.sc, args); | |
1271 | kfree(args); | |
1272 | ||
1273 | return err; | |
1274 | } | |
1275 | ||
1276 | static long fastrpc_device_ioctl(struct file *file, unsigned int cmd, | |
1277 | unsigned long arg) | |
1278 | { | |
1279 | struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; | |
1280 | char __user *argp = (char __user *)arg; | |
1281 | int err; | |
1282 | ||
1283 | switch (cmd) { | |
1284 | case FASTRPC_IOCTL_INVOKE: | |
1285 | err = fastrpc_invoke(fl, argp); | |
1286 | break; | |
d73f71c7 SK |
1287 | case FASTRPC_IOCTL_INIT_ATTACH: |
1288 | err = fastrpc_init_attach(fl); | |
1289 | break; | |
1290 | case FASTRPC_IOCTL_INIT_CREATE: | |
1291 | err = fastrpc_init_create_process(fl, argp); | |
1292 | break; | |
6cffd795 SK |
1293 | case FASTRPC_IOCTL_FREE_DMA_BUFF: |
1294 | err = fastrpc_dmabuf_free(fl, argp); | |
1295 | break; | |
1296 | case FASTRPC_IOCTL_ALLOC_DMA_BUFF: | |
1297 | err = fastrpc_dmabuf_alloc(fl, argp); | |
1298 | break; | |
c68cfb71 SK |
1299 | default: |
1300 | err = -ENOTTY; | |
1301 | break; | |
1302 | } | |
1303 | ||
1304 | return err; | |
1305 | } | |
1306 | ||
f6f9279f SK |
1307 | static const struct file_operations fastrpc_fops = { |
1308 | .open = fastrpc_device_open, | |
1309 | .release = fastrpc_device_release, | |
c68cfb71 SK |
1310 | .unlocked_ioctl = fastrpc_device_ioctl, |
1311 | .compat_ioctl = fastrpc_device_ioctl, | |
f6f9279f SK |
1312 | }; |
1313 | ||
1314 | static int fastrpc_cb_probe(struct platform_device *pdev) | |
1315 | { | |
1316 | struct fastrpc_channel_ctx *cctx; | |
1317 | struct fastrpc_session_ctx *sess; | |
1318 | struct device *dev = &pdev->dev; | |
1319 | int i, sessions = 0; | |
977e6c8d | 1320 | unsigned long flags; |
01b76c32 | 1321 | int rc; |
f6f9279f SK |
1322 | |
1323 | cctx = dev_get_drvdata(dev->parent); | |
1324 | if (!cctx) | |
1325 | return -EINVAL; | |
1326 | ||
1327 | of_property_read_u32(dev->of_node, "qcom,nsessions", &sessions); | |
1328 | ||
977e6c8d | 1329 | spin_lock_irqsave(&cctx->lock, flags); |
f6f9279f SK |
1330 | sess = &cctx->session[cctx->sesscount]; |
1331 | sess->used = false; | |
1332 | sess->valid = true; | |
1333 | sess->dev = dev; | |
1334 | dev_set_drvdata(dev, sess); | |
1335 | ||
1336 | if (of_property_read_u32(dev->of_node, "reg", &sess->sid)) | |
1337 | dev_info(dev, "FastRPC Session ID not specified in DT\n"); | |
1338 | ||
1339 | if (sessions > 0) { | |
1340 | struct fastrpc_session_ctx *dup_sess; | |
1341 | ||
1342 | for (i = 1; i < sessions; i++) { | |
1343 | if (cctx->sesscount++ >= FASTRPC_MAX_SESSIONS) | |
1344 | break; | |
1345 | dup_sess = &cctx->session[cctx->sesscount]; | |
1346 | memcpy(dup_sess, sess, sizeof(*dup_sess)); | |
1347 | } | |
1348 | } | |
1349 | cctx->sesscount++; | |
977e6c8d | 1350 | spin_unlock_irqrestore(&cctx->lock, flags); |
01b76c32 BY |
1351 | rc = dma_set_mask(dev, DMA_BIT_MASK(32)); |
1352 | if (rc) { | |
1353 | dev_err(dev, "32-bit DMA enable failed\n"); | |
1354 | return rc; | |
1355 | } | |
f6f9279f SK |
1356 | |
1357 | return 0; | |
1358 | } | |
1359 | ||
1360 | static int fastrpc_cb_remove(struct platform_device *pdev) | |
1361 | { | |
1362 | struct fastrpc_channel_ctx *cctx = dev_get_drvdata(pdev->dev.parent); | |
1363 | struct fastrpc_session_ctx *sess = dev_get_drvdata(&pdev->dev); | |
977e6c8d | 1364 | unsigned long flags; |
f6f9279f SK |
1365 | int i; |
1366 | ||
977e6c8d | 1367 | spin_lock_irqsave(&cctx->lock, flags); |
f6f9279f SK |
1368 | for (i = 1; i < FASTRPC_MAX_SESSIONS; i++) { |
1369 | if (cctx->session[i].sid == sess->sid) { | |
1370 | cctx->session[i].valid = false; | |
1371 | cctx->sesscount--; | |
1372 | } | |
1373 | } | |
977e6c8d | 1374 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f SK |
1375 | |
1376 | return 0; | |
1377 | } | |
1378 | ||
1379 | static const struct of_device_id fastrpc_match_table[] = { | |
1380 | { .compatible = "qcom,fastrpc-compute-cb", }, | |
1381 | {} | |
1382 | }; | |
1383 | ||
1384 | static struct platform_driver fastrpc_cb_driver = { | |
1385 | .probe = fastrpc_cb_probe, | |
1386 | .remove = fastrpc_cb_remove, | |
1387 | .driver = { | |
1388 | .name = "qcom,fastrpc-cb", | |
1389 | .of_match_table = fastrpc_match_table, | |
1390 | .suppress_bind_attrs = true, | |
1391 | }, | |
1392 | }; | |
1393 | ||
1394 | static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev) | |
1395 | { | |
1396 | struct device *rdev = &rpdev->dev; | |
1397 | struct fastrpc_channel_ctx *data; | |
1398 | int i, err, domain_id = -1; | |
1399 | const char *domain; | |
1400 | ||
1401 | data = devm_kzalloc(rdev, sizeof(*data), GFP_KERNEL); | |
1402 | if (!data) | |
1403 | return -ENOMEM; | |
1404 | ||
1405 | err = of_property_read_string(rdev->of_node, "label", &domain); | |
1406 | if (err) { | |
1407 | dev_info(rdev, "FastRPC Domain not specified in DT\n"); | |
1408 | return err; | |
1409 | } | |
1410 | ||
1411 | for (i = 0; i <= CDSP_DOMAIN_ID; i++) { | |
1412 | if (!strcmp(domains[i], domain)) { | |
1413 | domain_id = i; | |
1414 | break; | |
1415 | } | |
1416 | } | |
1417 | ||
1418 | if (domain_id < 0) { | |
1419 | dev_info(rdev, "FastRPC Invalid Domain ID %d\n", domain_id); | |
1420 | return -EINVAL; | |
1421 | } | |
1422 | ||
1423 | data->miscdev.minor = MISC_DYNAMIC_MINOR; | |
1424 | data->miscdev.name = kasprintf(GFP_KERNEL, "fastrpc-%s", | |
1425 | domains[domain_id]); | |
1426 | data->miscdev.fops = &fastrpc_fops; | |
1427 | err = misc_register(&data->miscdev); | |
1428 | if (err) | |
1429 | return err; | |
1430 | ||
1431 | dev_set_drvdata(&rpdev->dev, data); | |
1432 | dma_set_mask_and_coherent(rdev, DMA_BIT_MASK(32)); | |
1433 | INIT_LIST_HEAD(&data->users); | |
1434 | spin_lock_init(&data->lock); | |
1435 | idr_init(&data->ctx_idr); | |
1436 | data->domain_id = domain_id; | |
1437 | data->rpdev = rpdev; | |
1438 | ||
1439 | return of_platform_populate(rdev->of_node, NULL, NULL, rdev); | |
1440 | } | |
1441 | ||
c68cfb71 SK |
1442 | static void fastrpc_notify_users(struct fastrpc_user *user) |
1443 | { | |
1444 | struct fastrpc_invoke_ctx *ctx; | |
1445 | ||
1446 | spin_lock(&user->lock); | |
1447 | list_for_each_entry(ctx, &user->pending, node) | |
1448 | complete(&ctx->work); | |
1449 | spin_unlock(&user->lock); | |
1450 | } | |
1451 | ||
f6f9279f SK |
1452 | static void fastrpc_rpmsg_remove(struct rpmsg_device *rpdev) |
1453 | { | |
1454 | struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); | |
c68cfb71 | 1455 | struct fastrpc_user *user; |
977e6c8d | 1456 | unsigned long flags; |
c68cfb71 | 1457 | |
977e6c8d | 1458 | spin_lock_irqsave(&cctx->lock, flags); |
c68cfb71 SK |
1459 | list_for_each_entry(user, &cctx->users, user) |
1460 | fastrpc_notify_users(user); | |
977e6c8d | 1461 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f SK |
1462 | |
1463 | misc_deregister(&cctx->miscdev); | |
1464 | of_platform_depopulate(&rpdev->dev); | |
1465 | kfree(cctx); | |
1466 | } | |
1467 | ||
1468 | static int fastrpc_rpmsg_callback(struct rpmsg_device *rpdev, void *data, | |
1469 | int len, void *priv, u32 addr) | |
1470 | { | |
c68cfb71 SK |
1471 | struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); |
1472 | struct fastrpc_invoke_rsp *rsp = data; | |
1473 | struct fastrpc_invoke_ctx *ctx; | |
1474 | unsigned long flags; | |
1475 | unsigned long ctxid; | |
1476 | ||
1477 | if (len < sizeof(*rsp)) | |
1478 | return -EINVAL; | |
1479 | ||
1480 | ctxid = ((rsp->ctx & FASTRPC_CTXID_MASK) >> 4); | |
1481 | ||
1482 | spin_lock_irqsave(&cctx->lock, flags); | |
1483 | ctx = idr_find(&cctx->ctx_idr, ctxid); | |
1484 | spin_unlock_irqrestore(&cctx->lock, flags); | |
1485 | ||
1486 | if (!ctx) { | |
1487 | dev_err(&rpdev->dev, "No context ID matches response\n"); | |
1488 | return -ENOENT; | |
1489 | } | |
1490 | ||
1491 | ctx->retval = rsp->retval; | |
1492 | complete(&ctx->work); | |
8e7389c7 TE |
1493 | |
1494 | /* | |
1495 | * The DMA buffer associated with the context cannot be freed in | |
1496 | * interrupt context so schedule it through a worker thread to | |
1497 | * avoid a kernel BUG. | |
1498 | */ | |
1499 | schedule_work(&ctx->put_work); | |
c68cfb71 | 1500 | |
f6f9279f SK |
1501 | return 0; |
1502 | } | |
1503 | ||
1504 | static const struct of_device_id fastrpc_rpmsg_of_match[] = { | |
1505 | { .compatible = "qcom,fastrpc" }, | |
1506 | { }, | |
1507 | }; | |
1508 | MODULE_DEVICE_TABLE(of, fastrpc_rpmsg_of_match); | |
1509 | ||
1510 | static struct rpmsg_driver fastrpc_driver = { | |
1511 | .probe = fastrpc_rpmsg_probe, | |
1512 | .remove = fastrpc_rpmsg_remove, | |
1513 | .callback = fastrpc_rpmsg_callback, | |
1514 | .drv = { | |
1515 | .name = "qcom,fastrpc", | |
1516 | .of_match_table = fastrpc_rpmsg_of_match, | |
1517 | }, | |
1518 | }; | |
1519 | ||
1520 | static int fastrpc_init(void) | |
1521 | { | |
1522 | int ret; | |
1523 | ||
1524 | ret = platform_driver_register(&fastrpc_cb_driver); | |
1525 | if (ret < 0) { | |
1526 | pr_err("fastrpc: failed to register cb driver\n"); | |
1527 | return ret; | |
1528 | } | |
1529 | ||
1530 | ret = register_rpmsg_driver(&fastrpc_driver); | |
1531 | if (ret < 0) { | |
1532 | pr_err("fastrpc: failed to register rpmsg driver\n"); | |
1533 | platform_driver_unregister(&fastrpc_cb_driver); | |
1534 | return ret; | |
1535 | } | |
1536 | ||
1537 | return 0; | |
1538 | } | |
1539 | module_init(fastrpc_init); | |
1540 | ||
1541 | static void fastrpc_exit(void) | |
1542 | { | |
1543 | platform_driver_unregister(&fastrpc_cb_driver); | |
1544 | unregister_rpmsg_driver(&fastrpc_driver); | |
1545 | } | |
1546 | module_exit(fastrpc_exit); | |
1547 | ||
1548 | MODULE_LICENSE("GPL v2"); |