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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) |
efcd2390 | 35 | #define INIT_FILELEN_MAX (2 * 1024 * 1024) |
f6f9279f | 36 | #define FASTRPC_DEVICE_NAME "fastrpc" |
2419e55e | 37 | #define ADSP_MMAP_ADD_PAGES 0x1000 |
f6f9279f | 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 | |
2419e55e JRO |
70 | #define FASTRPC_RMID_INIT_MMAP 4 |
71 | #define FASTRPC_RMID_INIT_MUNMAP 5 | |
d73f71c7 SK |
72 | #define FASTRPC_RMID_INIT_CREATE 6 |
73 | #define FASTRPC_RMID_INIT_CREATE_ATTR 7 | |
74 | #define FASTRPC_RMID_INIT_CREATE_STATIC 8 | |
75 | ||
84195d20 JM |
76 | /* Protection Domain(PD) ids */ |
77 | #define AUDIO_PD (0) /* also GUEST_OS PD? */ | |
78 | #define USER_PD (1) | |
79 | #define SENSORS_PD (2) | |
80 | ||
f6f9279f SK |
81 | #define miscdev_to_cctx(d) container_of(d, struct fastrpc_channel_ctx, miscdev) |
82 | ||
83 | static const char *domains[FASTRPC_DEV_MAX] = { "adsp", "mdsp", | |
84 | "sdsp", "cdsp"}; | |
c68cfb71 SK |
85 | struct fastrpc_phy_page { |
86 | u64 addr; /* physical address */ | |
87 | u64 size; /* size of contiguous region */ | |
88 | }; | |
89 | ||
90 | struct fastrpc_invoke_buf { | |
91 | u32 num; /* number of contiguous regions */ | |
92 | u32 pgidx; /* index to start of contiguous region */ | |
93 | }; | |
94 | ||
95 | struct fastrpc_remote_arg { | |
96 | u64 pv; | |
97 | u64 len; | |
98 | }; | |
99 | ||
2419e55e JRO |
100 | struct fastrpc_mmap_rsp_msg { |
101 | u64 vaddr; | |
102 | }; | |
103 | ||
104 | struct fastrpc_mmap_req_msg { | |
105 | s32 pgid; | |
106 | u32 flags; | |
107 | u64 vaddr; | |
108 | s32 num; | |
109 | }; | |
110 | ||
111 | struct fastrpc_munmap_req_msg { | |
112 | s32 pgid; | |
113 | u64 vaddr; | |
114 | u64 size; | |
115 | }; | |
116 | ||
c68cfb71 SK |
117 | struct fastrpc_msg { |
118 | int pid; /* process group id */ | |
119 | int tid; /* thread id */ | |
120 | u64 ctx; /* invoke caller context */ | |
121 | u32 handle; /* handle to invoke */ | |
122 | u32 sc; /* scalars structure describing the data */ | |
123 | u64 addr; /* physical address */ | |
124 | u64 size; /* size of contiguous region */ | |
125 | }; | |
126 | ||
127 | struct fastrpc_invoke_rsp { | |
128 | u64 ctx; /* invoke caller context */ | |
129 | int retval; /* invoke return value */ | |
130 | }; | |
131 | ||
25e8dfb8 SK |
132 | struct fastrpc_buf_overlap { |
133 | u64 start; | |
134 | u64 end; | |
135 | int raix; | |
136 | u64 mstart; | |
137 | u64 mend; | |
138 | u64 offset; | |
139 | }; | |
140 | ||
c68cfb71 SK |
141 | struct fastrpc_buf { |
142 | struct fastrpc_user *fl; | |
6cffd795 | 143 | struct dma_buf *dmabuf; |
c68cfb71 SK |
144 | struct device *dev; |
145 | void *virt; | |
146 | u64 phys; | |
147 | u64 size; | |
6cffd795 SK |
148 | /* Lock for dma buf attachments */ |
149 | struct mutex lock; | |
150 | struct list_head attachments; | |
2419e55e JRO |
151 | /* mmap support */ |
152 | struct list_head node; /* list of user requested mmaps */ | |
153 | uintptr_t raddr; | |
6cffd795 SK |
154 | }; |
155 | ||
156 | struct fastrpc_dma_buf_attachment { | |
157 | struct device *dev; | |
158 | struct sg_table sgt; | |
159 | struct list_head node; | |
c68cfb71 SK |
160 | }; |
161 | ||
162 | struct fastrpc_map { | |
163 | struct list_head node; | |
164 | struct fastrpc_user *fl; | |
165 | int fd; | |
166 | struct dma_buf *buf; | |
167 | struct sg_table *table; | |
168 | struct dma_buf_attachment *attach; | |
169 | u64 phys; | |
170 | u64 size; | |
171 | void *va; | |
172 | u64 len; | |
173 | struct kref refcount; | |
174 | }; | |
175 | ||
176 | struct fastrpc_invoke_ctx { | |
177 | int nscalars; | |
178 | int nbufs; | |
179 | int retval; | |
180 | int pid; | |
181 | int tgid; | |
182 | u32 sc; | |
183 | u32 *crc; | |
184 | u64 ctxid; | |
185 | u64 msg_sz; | |
186 | struct kref refcount; | |
187 | struct list_head node; /* list of ctxs */ | |
188 | struct completion work; | |
8e7389c7 | 189 | struct work_struct put_work; |
c68cfb71 SK |
190 | struct fastrpc_msg msg; |
191 | struct fastrpc_user *fl; | |
192 | struct fastrpc_remote_arg *rpra; | |
193 | struct fastrpc_map **maps; | |
194 | struct fastrpc_buf *buf; | |
195 | struct fastrpc_invoke_args *args; | |
25e8dfb8 | 196 | struct fastrpc_buf_overlap *olaps; |
c68cfb71 SK |
197 | struct fastrpc_channel_ctx *cctx; |
198 | }; | |
f6f9279f SK |
199 | |
200 | struct fastrpc_session_ctx { | |
201 | struct device *dev; | |
202 | int sid; | |
203 | bool used; | |
204 | bool valid; | |
205 | }; | |
206 | ||
207 | struct fastrpc_channel_ctx { | |
208 | int domain_id; | |
209 | int sesscount; | |
210 | struct rpmsg_device *rpdev; | |
211 | struct fastrpc_session_ctx session[FASTRPC_MAX_SESSIONS]; | |
212 | spinlock_t lock; | |
213 | struct idr ctx_idr; | |
214 | struct list_head users; | |
215 | struct miscdevice miscdev; | |
278d56f9 | 216 | struct kref refcount; |
f6f9279f SK |
217 | }; |
218 | ||
219 | struct fastrpc_user { | |
220 | struct list_head user; | |
221 | struct list_head maps; | |
222 | struct list_head pending; | |
2419e55e | 223 | struct list_head mmaps; |
f6f9279f SK |
224 | |
225 | struct fastrpc_channel_ctx *cctx; | |
226 | struct fastrpc_session_ctx *sctx; | |
c68cfb71 | 227 | struct fastrpc_buf *init_mem; |
f6f9279f SK |
228 | |
229 | int tgid; | |
230 | int pd; | |
231 | /* Lock for lists */ | |
232 | spinlock_t lock; | |
233 | /* lock for allocations */ | |
234 | struct mutex mutex; | |
235 | }; | |
236 | ||
c68cfb71 SK |
237 | static void fastrpc_free_map(struct kref *ref) |
238 | { | |
239 | struct fastrpc_map *map; | |
240 | ||
241 | map = container_of(ref, struct fastrpc_map, refcount); | |
242 | ||
243 | if (map->table) { | |
244 | dma_buf_unmap_attachment(map->attach, map->table, | |
245 | DMA_BIDIRECTIONAL); | |
246 | dma_buf_detach(map->buf, map->attach); | |
247 | dma_buf_put(map->buf); | |
248 | } | |
249 | ||
250 | kfree(map); | |
251 | } | |
252 | ||
253 | static void fastrpc_map_put(struct fastrpc_map *map) | |
254 | { | |
255 | if (map) | |
256 | kref_put(&map->refcount, fastrpc_free_map); | |
257 | } | |
258 | ||
259 | static void fastrpc_map_get(struct fastrpc_map *map) | |
260 | { | |
261 | if (map) | |
262 | kref_get(&map->refcount); | |
263 | } | |
264 | ||
265 | static int fastrpc_map_find(struct fastrpc_user *fl, int fd, | |
266 | struct fastrpc_map **ppmap) | |
267 | { | |
268 | struct fastrpc_map *map = NULL; | |
269 | ||
270 | mutex_lock(&fl->mutex); | |
271 | list_for_each_entry(map, &fl->maps, node) { | |
272 | if (map->fd == fd) { | |
273 | fastrpc_map_get(map); | |
274 | *ppmap = map; | |
275 | mutex_unlock(&fl->mutex); | |
276 | return 0; | |
277 | } | |
278 | } | |
279 | mutex_unlock(&fl->mutex); | |
280 | ||
281 | return -ENOENT; | |
282 | } | |
283 | ||
284 | static void fastrpc_buf_free(struct fastrpc_buf *buf) | |
285 | { | |
286 | dma_free_coherent(buf->dev, buf->size, buf->virt, | |
287 | FASTRPC_PHYS(buf->phys)); | |
288 | kfree(buf); | |
289 | } | |
290 | ||
291 | static int fastrpc_buf_alloc(struct fastrpc_user *fl, struct device *dev, | |
292 | u64 size, struct fastrpc_buf **obuf) | |
293 | { | |
294 | struct fastrpc_buf *buf; | |
295 | ||
296 | buf = kzalloc(sizeof(*buf), GFP_KERNEL); | |
297 | if (!buf) | |
298 | return -ENOMEM; | |
299 | ||
6cffd795 | 300 | INIT_LIST_HEAD(&buf->attachments); |
2419e55e | 301 | INIT_LIST_HEAD(&buf->node); |
6cffd795 SK |
302 | mutex_init(&buf->lock); |
303 | ||
c68cfb71 SK |
304 | buf->fl = fl; |
305 | buf->virt = NULL; | |
306 | buf->phys = 0; | |
307 | buf->size = size; | |
308 | buf->dev = dev; | |
2419e55e | 309 | buf->raddr = 0; |
c68cfb71 SK |
310 | |
311 | buf->virt = dma_alloc_coherent(dev, buf->size, (dma_addr_t *)&buf->phys, | |
312 | GFP_KERNEL); | |
41db5f83 JRO |
313 | if (!buf->virt) { |
314 | mutex_destroy(&buf->lock); | |
315 | kfree(buf); | |
c68cfb71 | 316 | return -ENOMEM; |
41db5f83 | 317 | } |
c68cfb71 SK |
318 | |
319 | if (fl->sctx && fl->sctx->sid) | |
320 | buf->phys += ((u64)fl->sctx->sid << 32); | |
321 | ||
322 | *obuf = buf; | |
323 | ||
324 | return 0; | |
325 | } | |
326 | ||
278d56f9 BA |
327 | static void fastrpc_channel_ctx_free(struct kref *ref) |
328 | { | |
329 | struct fastrpc_channel_ctx *cctx; | |
330 | ||
331 | cctx = container_of(ref, struct fastrpc_channel_ctx, refcount); | |
332 | ||
333 | kfree(cctx); | |
334 | } | |
335 | ||
336 | static void fastrpc_channel_ctx_get(struct fastrpc_channel_ctx *cctx) | |
337 | { | |
338 | kref_get(&cctx->refcount); | |
339 | } | |
340 | ||
341 | static void fastrpc_channel_ctx_put(struct fastrpc_channel_ctx *cctx) | |
342 | { | |
343 | kref_put(&cctx->refcount, fastrpc_channel_ctx_free); | |
344 | } | |
345 | ||
c68cfb71 SK |
346 | static void fastrpc_context_free(struct kref *ref) |
347 | { | |
348 | struct fastrpc_invoke_ctx *ctx; | |
349 | struct fastrpc_channel_ctx *cctx; | |
977e6c8d | 350 | unsigned long flags; |
c68cfb71 SK |
351 | int i; |
352 | ||
353 | ctx = container_of(ref, struct fastrpc_invoke_ctx, refcount); | |
354 | cctx = ctx->cctx; | |
355 | ||
356 | for (i = 0; i < ctx->nscalars; i++) | |
357 | fastrpc_map_put(ctx->maps[i]); | |
358 | ||
359 | if (ctx->buf) | |
360 | fastrpc_buf_free(ctx->buf); | |
361 | ||
977e6c8d | 362 | spin_lock_irqsave(&cctx->lock, flags); |
c68cfb71 | 363 | idr_remove(&cctx->ctx_idr, ctx->ctxid >> 4); |
977e6c8d | 364 | spin_unlock_irqrestore(&cctx->lock, flags); |
c68cfb71 SK |
365 | |
366 | kfree(ctx->maps); | |
25e8dfb8 | 367 | kfree(ctx->olaps); |
c68cfb71 | 368 | kfree(ctx); |
278d56f9 BA |
369 | |
370 | fastrpc_channel_ctx_put(cctx); | |
c68cfb71 SK |
371 | } |
372 | ||
373 | static void fastrpc_context_get(struct fastrpc_invoke_ctx *ctx) | |
374 | { | |
375 | kref_get(&ctx->refcount); | |
376 | } | |
377 | ||
378 | static void fastrpc_context_put(struct fastrpc_invoke_ctx *ctx) | |
379 | { | |
380 | kref_put(&ctx->refcount, fastrpc_context_free); | |
381 | } | |
382 | ||
8e7389c7 TE |
383 | static void fastrpc_context_put_wq(struct work_struct *work) |
384 | { | |
385 | struct fastrpc_invoke_ctx *ctx = | |
386 | container_of(work, struct fastrpc_invoke_ctx, put_work); | |
387 | ||
388 | fastrpc_context_put(ctx); | |
389 | } | |
390 | ||
25e8dfb8 SK |
391 | #define CMP(aa, bb) ((aa) == (bb) ? 0 : (aa) < (bb) ? -1 : 1) |
392 | static int olaps_cmp(const void *a, const void *b) | |
393 | { | |
394 | struct fastrpc_buf_overlap *pa = (struct fastrpc_buf_overlap *)a; | |
395 | struct fastrpc_buf_overlap *pb = (struct fastrpc_buf_overlap *)b; | |
396 | /* sort with lowest starting buffer first */ | |
397 | int st = CMP(pa->start, pb->start); | |
398 | /* sort with highest ending buffer first */ | |
399 | int ed = CMP(pb->end, pa->end); | |
400 | ||
401 | return st == 0 ? ed : st; | |
402 | } | |
403 | ||
404 | static void fastrpc_get_buff_overlaps(struct fastrpc_invoke_ctx *ctx) | |
405 | { | |
406 | u64 max_end = 0; | |
407 | int i; | |
408 | ||
409 | for (i = 0; i < ctx->nbufs; ++i) { | |
410 | ctx->olaps[i].start = ctx->args[i].ptr; | |
411 | ctx->olaps[i].end = ctx->olaps[i].start + ctx->args[i].length; | |
412 | ctx->olaps[i].raix = i; | |
413 | } | |
414 | ||
415 | sort(ctx->olaps, ctx->nbufs, sizeof(*ctx->olaps), olaps_cmp, NULL); | |
416 | ||
417 | for (i = 0; i < ctx->nbufs; ++i) { | |
418 | /* Falling inside previous range */ | |
419 | if (ctx->olaps[i].start < max_end) { | |
420 | ctx->olaps[i].mstart = max_end; | |
421 | ctx->olaps[i].mend = ctx->olaps[i].end; | |
422 | ctx->olaps[i].offset = max_end - ctx->olaps[i].start; | |
423 | ||
424 | if (ctx->olaps[i].end > max_end) { | |
425 | max_end = ctx->olaps[i].end; | |
426 | } else { | |
427 | ctx->olaps[i].mend = 0; | |
428 | ctx->olaps[i].mstart = 0; | |
429 | } | |
430 | ||
431 | } else { | |
432 | ctx->olaps[i].mend = ctx->olaps[i].end; | |
433 | ctx->olaps[i].mstart = ctx->olaps[i].start; | |
434 | ctx->olaps[i].offset = 0; | |
435 | max_end = ctx->olaps[i].end; | |
436 | } | |
437 | } | |
438 | } | |
439 | ||
c68cfb71 SK |
440 | static struct fastrpc_invoke_ctx *fastrpc_context_alloc( |
441 | struct fastrpc_user *user, u32 kernel, u32 sc, | |
442 | struct fastrpc_invoke_args *args) | |
443 | { | |
444 | struct fastrpc_channel_ctx *cctx = user->cctx; | |
445 | struct fastrpc_invoke_ctx *ctx = NULL; | |
977e6c8d | 446 | unsigned long flags; |
c68cfb71 SK |
447 | int ret; |
448 | ||
449 | ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); | |
450 | if (!ctx) | |
451 | return ERR_PTR(-ENOMEM); | |
452 | ||
453 | INIT_LIST_HEAD(&ctx->node); | |
454 | ctx->fl = user; | |
455 | ctx->nscalars = REMOTE_SCALARS_LENGTH(sc); | |
456 | ctx->nbufs = REMOTE_SCALARS_INBUFS(sc) + | |
457 | REMOTE_SCALARS_OUTBUFS(sc); | |
458 | ||
459 | if (ctx->nscalars) { | |
460 | ctx->maps = kcalloc(ctx->nscalars, | |
461 | sizeof(*ctx->maps), GFP_KERNEL); | |
462 | if (!ctx->maps) { | |
463 | kfree(ctx); | |
464 | return ERR_PTR(-ENOMEM); | |
465 | } | |
25e8dfb8 SK |
466 | ctx->olaps = kcalloc(ctx->nscalars, |
467 | sizeof(*ctx->olaps), GFP_KERNEL); | |
468 | if (!ctx->olaps) { | |
469 | kfree(ctx->maps); | |
470 | kfree(ctx); | |
471 | return ERR_PTR(-ENOMEM); | |
472 | } | |
c68cfb71 | 473 | ctx->args = args; |
25e8dfb8 | 474 | fastrpc_get_buff_overlaps(ctx); |
c68cfb71 SK |
475 | } |
476 | ||
278d56f9 BA |
477 | /* Released in fastrpc_context_put() */ |
478 | fastrpc_channel_ctx_get(cctx); | |
479 | ||
c68cfb71 SK |
480 | ctx->sc = sc; |
481 | ctx->retval = -1; | |
482 | ctx->pid = current->pid; | |
483 | ctx->tgid = user->tgid; | |
484 | ctx->cctx = cctx; | |
485 | init_completion(&ctx->work); | |
8e7389c7 | 486 | INIT_WORK(&ctx->put_work, fastrpc_context_put_wq); |
c68cfb71 SK |
487 | |
488 | spin_lock(&user->lock); | |
489 | list_add_tail(&ctx->node, &user->pending); | |
490 | spin_unlock(&user->lock); | |
491 | ||
977e6c8d | 492 | spin_lock_irqsave(&cctx->lock, flags); |
c68cfb71 SK |
493 | ret = idr_alloc_cyclic(&cctx->ctx_idr, ctx, 1, |
494 | FASTRPC_CTX_MAX, GFP_ATOMIC); | |
495 | if (ret < 0) { | |
977e6c8d | 496 | spin_unlock_irqrestore(&cctx->lock, flags); |
c68cfb71 SK |
497 | goto err_idr; |
498 | } | |
499 | ctx->ctxid = ret << 4; | |
977e6c8d | 500 | spin_unlock_irqrestore(&cctx->lock, flags); |
c68cfb71 SK |
501 | |
502 | kref_init(&ctx->refcount); | |
503 | ||
504 | return ctx; | |
505 | err_idr: | |
506 | spin_lock(&user->lock); | |
507 | list_del(&ctx->node); | |
508 | spin_unlock(&user->lock); | |
278d56f9 | 509 | fastrpc_channel_ctx_put(cctx); |
c68cfb71 | 510 | kfree(ctx->maps); |
25e8dfb8 | 511 | kfree(ctx->olaps); |
c68cfb71 SK |
512 | kfree(ctx); |
513 | ||
514 | return ERR_PTR(ret); | |
515 | } | |
516 | ||
6cffd795 SK |
517 | static struct sg_table * |
518 | fastrpc_map_dma_buf(struct dma_buf_attachment *attachment, | |
519 | enum dma_data_direction dir) | |
520 | { | |
521 | struct fastrpc_dma_buf_attachment *a = attachment->priv; | |
522 | struct sg_table *table; | |
b212658a | 523 | int ret; |
6cffd795 SK |
524 | |
525 | table = &a->sgt; | |
526 | ||
b212658a JM |
527 | ret = dma_map_sgtable(attachment->dev, table, dir, 0); |
528 | if (ret) | |
529 | table = ERR_PTR(ret); | |
6cffd795 SK |
530 | return table; |
531 | } | |
532 | ||
533 | static void fastrpc_unmap_dma_buf(struct dma_buf_attachment *attach, | |
534 | struct sg_table *table, | |
535 | enum dma_data_direction dir) | |
536 | { | |
7cd7edb8 | 537 | dma_unmap_sgtable(attach->dev, table, dir, 0); |
6cffd795 SK |
538 | } |
539 | ||
540 | static void fastrpc_release(struct dma_buf *dmabuf) | |
541 | { | |
542 | struct fastrpc_buf *buffer = dmabuf->priv; | |
543 | ||
544 | fastrpc_buf_free(buffer); | |
545 | } | |
546 | ||
547 | static int fastrpc_dma_buf_attach(struct dma_buf *dmabuf, | |
548 | struct dma_buf_attachment *attachment) | |
549 | { | |
550 | struct fastrpc_dma_buf_attachment *a; | |
551 | struct fastrpc_buf *buffer = dmabuf->priv; | |
552 | int ret; | |
553 | ||
554 | a = kzalloc(sizeof(*a), GFP_KERNEL); | |
555 | if (!a) | |
556 | return -ENOMEM; | |
557 | ||
558 | ret = dma_get_sgtable(buffer->dev, &a->sgt, buffer->virt, | |
559 | FASTRPC_PHYS(buffer->phys), buffer->size); | |
560 | if (ret < 0) { | |
561 | dev_err(buffer->dev, "failed to get scatterlist from DMA API\n"); | |
fc739a05 | 562 | kfree(a); |
6cffd795 SK |
563 | return -EINVAL; |
564 | } | |
565 | ||
566 | a->dev = attachment->dev; | |
567 | INIT_LIST_HEAD(&a->node); | |
568 | attachment->priv = a; | |
569 | ||
570 | mutex_lock(&buffer->lock); | |
571 | list_add(&a->node, &buffer->attachments); | |
572 | mutex_unlock(&buffer->lock); | |
573 | ||
574 | return 0; | |
575 | } | |
576 | ||
577 | static void fastrpc_dma_buf_detatch(struct dma_buf *dmabuf, | |
578 | struct dma_buf_attachment *attachment) | |
579 | { | |
580 | struct fastrpc_dma_buf_attachment *a = attachment->priv; | |
581 | struct fastrpc_buf *buffer = dmabuf->priv; | |
582 | ||
583 | mutex_lock(&buffer->lock); | |
584 | list_del(&a->node); | |
585 | mutex_unlock(&buffer->lock); | |
cf61860e | 586 | sg_free_table(&a->sgt); |
6cffd795 SK |
587 | kfree(a); |
588 | } | |
589 | ||
6619ccf1 | 590 | static int fastrpc_vmap(struct dma_buf *dmabuf, struct dma_buf_map *map) |
6cffd795 SK |
591 | { |
592 | struct fastrpc_buf *buf = dmabuf->priv; | |
593 | ||
6619ccf1 TZ |
594 | dma_buf_map_set_vaddr(map, buf->virt); |
595 | ||
596 | return 0; | |
6cffd795 SK |
597 | } |
598 | ||
599 | static int fastrpc_mmap(struct dma_buf *dmabuf, | |
600 | struct vm_area_struct *vma) | |
601 | { | |
602 | struct fastrpc_buf *buf = dmabuf->priv; | |
603 | size_t size = vma->vm_end - vma->vm_start; | |
604 | ||
605 | return dma_mmap_coherent(buf->dev, vma, buf->virt, | |
606 | FASTRPC_PHYS(buf->phys), size); | |
607 | } | |
608 | ||
609 | static const struct dma_buf_ops fastrpc_dma_buf_ops = { | |
610 | .attach = fastrpc_dma_buf_attach, | |
611 | .detach = fastrpc_dma_buf_detatch, | |
612 | .map_dma_buf = fastrpc_map_dma_buf, | |
613 | .unmap_dma_buf = fastrpc_unmap_dma_buf, | |
614 | .mmap = fastrpc_mmap, | |
6cffd795 SK |
615 | .vmap = fastrpc_vmap, |
616 | .release = fastrpc_release, | |
617 | }; | |
618 | ||
c68cfb71 SK |
619 | static int fastrpc_map_create(struct fastrpc_user *fl, int fd, |
620 | u64 len, struct fastrpc_map **ppmap) | |
621 | { | |
622 | struct fastrpc_session_ctx *sess = fl->sctx; | |
623 | struct fastrpc_map *map = NULL; | |
624 | int err = 0; | |
625 | ||
626 | if (!fastrpc_map_find(fl, fd, ppmap)) | |
627 | return 0; | |
628 | ||
629 | map = kzalloc(sizeof(*map), GFP_KERNEL); | |
630 | if (!map) | |
631 | return -ENOMEM; | |
632 | ||
633 | INIT_LIST_HEAD(&map->node); | |
634 | map->fl = fl; | |
635 | map->fd = fd; | |
636 | map->buf = dma_buf_get(fd); | |
682a6044 WY |
637 | if (IS_ERR(map->buf)) { |
638 | err = PTR_ERR(map->buf); | |
c68cfb71 SK |
639 | goto get_err; |
640 | } | |
641 | ||
642 | map->attach = dma_buf_attach(map->buf, sess->dev); | |
643 | if (IS_ERR(map->attach)) { | |
644 | dev_err(sess->dev, "Failed to attach dmabuf\n"); | |
645 | err = PTR_ERR(map->attach); | |
646 | goto attach_err; | |
647 | } | |
648 | ||
649 | map->table = dma_buf_map_attachment(map->attach, DMA_BIDIRECTIONAL); | |
650 | if (IS_ERR(map->table)) { | |
651 | err = PTR_ERR(map->table); | |
652 | goto map_err; | |
653 | } | |
654 | ||
655 | map->phys = sg_dma_address(map->table->sgl); | |
656 | map->phys += ((u64)fl->sctx->sid << 32); | |
657 | map->size = len; | |
658 | map->va = sg_virt(map->table->sgl); | |
659 | map->len = len; | |
660 | kref_init(&map->refcount); | |
661 | ||
662 | spin_lock(&fl->lock); | |
663 | list_add_tail(&map->node, &fl->maps); | |
664 | spin_unlock(&fl->lock); | |
665 | *ppmap = map; | |
666 | ||
667 | return 0; | |
668 | ||
669 | map_err: | |
670 | dma_buf_detach(map->buf, map->attach); | |
671 | attach_err: | |
672 | dma_buf_put(map->buf); | |
673 | get_err: | |
674 | kfree(map); | |
675 | ||
676 | return err; | |
677 | } | |
678 | ||
679 | /* | |
680 | * Fastrpc payload buffer with metadata looks like: | |
681 | * | |
682 | * >>>>>> START of METADATA <<<<<<<<< | |
683 | * +---------------------------------+ | |
684 | * | Arguments | | |
685 | * | type:(struct fastrpc_remote_arg)| | |
686 | * | (0 - N) | | |
687 | * +---------------------------------+ | |
688 | * | Invoke Buffer list | | |
689 | * | type:(struct fastrpc_invoke_buf)| | |
690 | * | (0 - N) | | |
691 | * +---------------------------------+ | |
692 | * | Page info list | | |
693 | * | type:(struct fastrpc_phy_page) | | |
694 | * | (0 - N) | | |
695 | * +---------------------------------+ | |
696 | * | Optional info | | |
697 | * |(can be specific to SoC/Firmware)| | |
698 | * +---------------------------------+ | |
699 | * >>>>>>>> END of METADATA <<<<<<<<< | |
700 | * +---------------------------------+ | |
701 | * | Inline ARGS | | |
702 | * | (0-N) | | |
703 | * +---------------------------------+ | |
704 | */ | |
705 | ||
706 | static int fastrpc_get_meta_size(struct fastrpc_invoke_ctx *ctx) | |
707 | { | |
708 | int size = 0; | |
709 | ||
710 | size = (sizeof(struct fastrpc_remote_arg) + | |
711 | sizeof(struct fastrpc_invoke_buf) + | |
712 | sizeof(struct fastrpc_phy_page)) * ctx->nscalars + | |
713 | sizeof(u64) * FASTRPC_MAX_FDLIST + | |
714 | sizeof(u32) * FASTRPC_MAX_CRCLIST; | |
715 | ||
716 | return size; | |
717 | } | |
718 | ||
719 | static u64 fastrpc_get_payload_size(struct fastrpc_invoke_ctx *ctx, int metalen) | |
720 | { | |
721 | u64 size = 0; | |
40ea80a2 | 722 | int oix; |
c68cfb71 SK |
723 | |
724 | size = ALIGN(metalen, FASTRPC_ALIGN); | |
40ea80a2 J |
725 | for (oix = 0; oix < ctx->nbufs; oix++) { |
726 | int i = ctx->olaps[oix].raix; | |
727 | ||
c68cfb71 | 728 | if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1) { |
25e8dfb8 | 729 | |
40ea80a2 | 730 | if (ctx->olaps[oix].offset == 0) |
25e8dfb8 SK |
731 | size = ALIGN(size, FASTRPC_ALIGN); |
732 | ||
40ea80a2 | 733 | size += (ctx->olaps[oix].mend - ctx->olaps[oix].mstart); |
c68cfb71 SK |
734 | } |
735 | } | |
736 | ||
737 | return size; | |
738 | } | |
739 | ||
740 | static int fastrpc_create_maps(struct fastrpc_invoke_ctx *ctx) | |
741 | { | |
742 | struct device *dev = ctx->fl->sctx->dev; | |
743 | int i, err; | |
744 | ||
745 | for (i = 0; i < ctx->nscalars; ++i) { | |
746 | /* Make sure reserved field is set to 0 */ | |
747 | if (ctx->args[i].reserved) | |
748 | return -EINVAL; | |
749 | ||
750 | if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1 || | |
751 | ctx->args[i].length == 0) | |
752 | continue; | |
753 | ||
754 | err = fastrpc_map_create(ctx->fl, ctx->args[i].fd, | |
755 | ctx->args[i].length, &ctx->maps[i]); | |
756 | if (err) { | |
757 | dev_err(dev, "Error Creating map %d\n", err); | |
758 | return -EINVAL; | |
759 | } | |
760 | ||
761 | } | |
762 | return 0; | |
763 | } | |
764 | ||
765 | static int fastrpc_get_args(u32 kernel, struct fastrpc_invoke_ctx *ctx) | |
766 | { | |
767 | struct device *dev = ctx->fl->sctx->dev; | |
768 | struct fastrpc_remote_arg *rpra; | |
769 | struct fastrpc_invoke_buf *list; | |
770 | struct fastrpc_phy_page *pages; | |
25e8dfb8 SK |
771 | int inbufs, i, oix, err = 0; |
772 | u64 len, rlen, pkt_size; | |
02b45b47 | 773 | u64 pg_start, pg_end; |
c68cfb71 SK |
774 | uintptr_t args; |
775 | int metalen; | |
776 | ||
c68cfb71 SK |
777 | inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); |
778 | metalen = fastrpc_get_meta_size(ctx); | |
779 | pkt_size = fastrpc_get_payload_size(ctx, metalen); | |
780 | ||
781 | err = fastrpc_create_maps(ctx); | |
782 | if (err) | |
783 | return err; | |
784 | ||
785 | ctx->msg_sz = pkt_size; | |
786 | ||
787 | err = fastrpc_buf_alloc(ctx->fl, dev, pkt_size, &ctx->buf); | |
788 | if (err) | |
789 | return err; | |
790 | ||
791 | rpra = ctx->buf->virt; | |
792 | list = ctx->buf->virt + ctx->nscalars * sizeof(*rpra); | |
793 | pages = ctx->buf->virt + ctx->nscalars * (sizeof(*list) + | |
794 | sizeof(*rpra)); | |
795 | args = (uintptr_t)ctx->buf->virt + metalen; | |
796 | rlen = pkt_size - metalen; | |
797 | ctx->rpra = rpra; | |
798 | ||
25e8dfb8 SK |
799 | for (oix = 0; oix < ctx->nbufs; ++oix) { |
800 | int mlen; | |
801 | ||
802 | i = ctx->olaps[oix].raix; | |
803 | len = ctx->args[i].length; | |
c68cfb71 SK |
804 | |
805 | rpra[i].pv = 0; | |
806 | rpra[i].len = len; | |
807 | list[i].num = len ? 1 : 0; | |
808 | list[i].pgidx = i; | |
809 | ||
810 | if (!len) | |
811 | continue; | |
812 | ||
c68cfb71 | 813 | if (ctx->maps[i]) { |
80f3afd7 SK |
814 | struct vm_area_struct *vma = NULL; |
815 | ||
c68cfb71 SK |
816 | rpra[i].pv = (u64) ctx->args[i].ptr; |
817 | pages[i].addr = ctx->maps[i]->phys; | |
80f3afd7 | 818 | |
f9a470db | 819 | mmap_read_lock(current->mm); |
80f3afd7 SK |
820 | vma = find_vma(current->mm, ctx->args[i].ptr); |
821 | if (vma) | |
822 | pages[i].addr += ctx->args[i].ptr - | |
823 | vma->vm_start; | |
f9a470db | 824 | mmap_read_unlock(current->mm); |
80f3afd7 | 825 | |
02b45b47 SK |
826 | pg_start = (ctx->args[i].ptr & PAGE_MASK) >> PAGE_SHIFT; |
827 | pg_end = ((ctx->args[i].ptr + len - 1) & PAGE_MASK) >> | |
828 | PAGE_SHIFT; | |
829 | pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; | |
830 | ||
c68cfb71 | 831 | } else { |
25e8dfb8 SK |
832 | |
833 | if (ctx->olaps[oix].offset == 0) { | |
834 | rlen -= ALIGN(args, FASTRPC_ALIGN) - args; | |
835 | args = ALIGN(args, FASTRPC_ALIGN); | |
836 | } | |
837 | ||
838 | mlen = ctx->olaps[oix].mend - ctx->olaps[oix].mstart; | |
839 | ||
840 | if (rlen < mlen) | |
c68cfb71 SK |
841 | goto bail; |
842 | ||
25e8dfb8 SK |
843 | rpra[i].pv = args - ctx->olaps[oix].offset; |
844 | pages[i].addr = ctx->buf->phys - | |
845 | ctx->olaps[oix].offset + | |
846 | (pkt_size - rlen); | |
c68cfb71 | 847 | pages[i].addr = pages[i].addr & PAGE_MASK; |
25e8dfb8 | 848 | |
02b45b47 SK |
849 | pg_start = (args & PAGE_MASK) >> PAGE_SHIFT; |
850 | pg_end = ((args + len - 1) & PAGE_MASK) >> PAGE_SHIFT; | |
851 | pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; | |
25e8dfb8 SK |
852 | args = args + mlen; |
853 | rlen -= mlen; | |
c68cfb71 SK |
854 | } |
855 | ||
856 | if (i < inbufs && !ctx->maps[i]) { | |
857 | void *dst = (void *)(uintptr_t)rpra[i].pv; | |
858 | void *src = (void *)(uintptr_t)ctx->args[i].ptr; | |
859 | ||
860 | if (!kernel) { | |
861 | if (copy_from_user(dst, (void __user *)src, | |
862 | len)) { | |
863 | err = -EFAULT; | |
864 | goto bail; | |
865 | } | |
866 | } else { | |
867 | memcpy(dst, src, len); | |
868 | } | |
869 | } | |
870 | } | |
871 | ||
872 | for (i = ctx->nbufs; i < ctx->nscalars; ++i) { | |
873 | rpra[i].pv = (u64) ctx->args[i].ptr; | |
874 | rpra[i].len = ctx->args[i].length; | |
875 | list[i].num = ctx->args[i].length ? 1 : 0; | |
876 | list[i].pgidx = i; | |
877 | pages[i].addr = ctx->maps[i]->phys; | |
878 | pages[i].size = ctx->maps[i]->size; | |
879 | } | |
880 | ||
881 | bail: | |
882 | if (err) | |
883 | dev_err(dev, "Error: get invoke args failed:%d\n", err); | |
884 | ||
885 | return err; | |
886 | } | |
887 | ||
888 | static int fastrpc_put_args(struct fastrpc_invoke_ctx *ctx, | |
889 | u32 kernel) | |
890 | { | |
891 | struct fastrpc_remote_arg *rpra = ctx->rpra; | |
892 | int i, inbufs; | |
893 | ||
894 | inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); | |
895 | ||
896 | for (i = inbufs; i < ctx->nbufs; ++i) { | |
897 | void *src = (void *)(uintptr_t)rpra[i].pv; | |
898 | void *dst = (void *)(uintptr_t)ctx->args[i].ptr; | |
899 | u64 len = rpra[i].len; | |
900 | ||
901 | if (!kernel) { | |
902 | if (copy_to_user((void __user *)dst, src, len)) | |
903 | return -EFAULT; | |
904 | } else { | |
905 | memcpy(dst, src, len); | |
906 | } | |
907 | } | |
908 | ||
909 | return 0; | |
910 | } | |
911 | ||
912 | static int fastrpc_invoke_send(struct fastrpc_session_ctx *sctx, | |
913 | struct fastrpc_invoke_ctx *ctx, | |
914 | u32 kernel, uint32_t handle) | |
915 | { | |
916 | struct fastrpc_channel_ctx *cctx; | |
917 | struct fastrpc_user *fl = ctx->fl; | |
918 | struct fastrpc_msg *msg = &ctx->msg; | |
74003385 | 919 | int ret; |
c68cfb71 SK |
920 | |
921 | cctx = fl->cctx; | |
922 | msg->pid = fl->tgid; | |
923 | msg->tid = current->pid; | |
924 | ||
925 | if (kernel) | |
926 | msg->pid = 0; | |
927 | ||
928 | msg->ctx = ctx->ctxid | fl->pd; | |
929 | msg->handle = handle; | |
930 | msg->sc = ctx->sc; | |
931 | msg->addr = ctx->buf ? ctx->buf->phys : 0; | |
932 | msg->size = roundup(ctx->msg_sz, PAGE_SIZE); | |
933 | fastrpc_context_get(ctx); | |
934 | ||
74003385 SK |
935 | ret = rpmsg_send(cctx->rpdev->ept, (void *)msg, sizeof(*msg)); |
936 | ||
937 | if (ret) | |
938 | fastrpc_context_put(ctx); | |
939 | ||
940 | return ret; | |
941 | ||
c68cfb71 SK |
942 | } |
943 | ||
944 | static int fastrpc_internal_invoke(struct fastrpc_user *fl, u32 kernel, | |
945 | u32 handle, u32 sc, | |
946 | struct fastrpc_invoke_args *args) | |
947 | { | |
948 | struct fastrpc_invoke_ctx *ctx = NULL; | |
949 | int err = 0; | |
950 | ||
951 | if (!fl->sctx) | |
952 | return -EINVAL; | |
953 | ||
2e369878 BA |
954 | if (!fl->cctx->rpdev) |
955 | return -EPIPE; | |
956 | ||
20c40794 DB |
957 | if (handle == FASTRPC_INIT_HANDLE && !kernel) { |
958 | dev_warn_ratelimited(fl->sctx->dev, "user app trying to send a kernel RPC message (%d)\n", handle); | |
959 | return -EPERM; | |
960 | } | |
961 | ||
c68cfb71 SK |
962 | ctx = fastrpc_context_alloc(fl, kernel, sc, args); |
963 | if (IS_ERR(ctx)) | |
964 | return PTR_ERR(ctx); | |
965 | ||
966 | if (ctx->nscalars) { | |
967 | err = fastrpc_get_args(kernel, ctx); | |
968 | if (err) | |
969 | goto bail; | |
970 | } | |
415a0729 SK |
971 | |
972 | /* make sure that all CPU memory writes are seen by DSP */ | |
973 | dma_wmb(); | |
c68cfb71 SK |
974 | /* Send invoke buffer to remote dsp */ |
975 | err = fastrpc_invoke_send(fl->sctx, ctx, kernel, handle); | |
976 | if (err) | |
977 | goto bail; | |
978 | ||
55bcda35 JRO |
979 | if (kernel) { |
980 | if (!wait_for_completion_timeout(&ctx->work, 10 * HZ)) | |
981 | err = -ETIMEDOUT; | |
982 | } else { | |
983 | err = wait_for_completion_interruptible(&ctx->work); | |
984 | } | |
985 | ||
c68cfb71 SK |
986 | if (err) |
987 | goto bail; | |
988 | ||
989 | /* Check the response from remote dsp */ | |
990 | err = ctx->retval; | |
991 | if (err) | |
992 | goto bail; | |
993 | ||
994 | if (ctx->nscalars) { | |
415a0729 SK |
995 | /* make sure that all memory writes by DSP are seen by CPU */ |
996 | dma_rmb(); | |
c68cfb71 SK |
997 | /* populate all the output buffers with results */ |
998 | err = fastrpc_put_args(ctx, kernel); | |
999 | if (err) | |
1000 | goto bail; | |
1001 | } | |
1002 | ||
1003 | bail: | |
387f6255 JRO |
1004 | if (err != -ERESTARTSYS && err != -ETIMEDOUT) { |
1005 | /* We are done with this compute context */ | |
1006 | spin_lock(&fl->lock); | |
1007 | list_del(&ctx->node); | |
1008 | spin_unlock(&fl->lock); | |
1009 | fastrpc_context_put(ctx); | |
1010 | } | |
c68cfb71 SK |
1011 | if (err) |
1012 | dev_dbg(fl->sctx->dev, "Error: Invoke Failed %d\n", err); | |
1013 | ||
1014 | return err; | |
1015 | } | |
1016 | ||
d73f71c7 SK |
1017 | static int fastrpc_init_create_process(struct fastrpc_user *fl, |
1018 | char __user *argp) | |
1019 | { | |
1020 | struct fastrpc_init_create init; | |
1021 | struct fastrpc_invoke_args *args; | |
1022 | struct fastrpc_phy_page pages[1]; | |
1023 | struct fastrpc_map *map = NULL; | |
1024 | struct fastrpc_buf *imem = NULL; | |
1025 | int memlen; | |
1026 | int err; | |
1027 | struct { | |
1028 | int pgid; | |
1029 | u32 namelen; | |
1030 | u32 filelen; | |
1031 | u32 pageslen; | |
1032 | u32 attrs; | |
1033 | u32 siglen; | |
1034 | } inbuf; | |
1035 | u32 sc; | |
1036 | ||
1037 | args = kcalloc(FASTRPC_CREATE_PROCESS_NARGS, sizeof(*args), GFP_KERNEL); | |
1038 | if (!args) | |
1039 | return -ENOMEM; | |
1040 | ||
1041 | if (copy_from_user(&init, argp, sizeof(init))) { | |
1042 | err = -EFAULT; | |
b49f6d83 | 1043 | goto err; |
d73f71c7 SK |
1044 | } |
1045 | ||
1046 | if (init.filelen > INIT_FILELEN_MAX) { | |
1047 | err = -EINVAL; | |
b49f6d83 | 1048 | goto err; |
d73f71c7 SK |
1049 | } |
1050 | ||
1051 | inbuf.pgid = fl->tgid; | |
1052 | inbuf.namelen = strlen(current->comm) + 1; | |
1053 | inbuf.filelen = init.filelen; | |
1054 | inbuf.pageslen = 1; | |
1055 | inbuf.attrs = init.attrs; | |
1056 | inbuf.siglen = init.siglen; | |
84195d20 | 1057 | fl->pd = USER_PD; |
d73f71c7 SK |
1058 | |
1059 | if (init.filelen && init.filefd) { | |
1060 | err = fastrpc_map_create(fl, init.filefd, init.filelen, &map); | |
1061 | if (err) | |
b49f6d83 | 1062 | goto err; |
d73f71c7 SK |
1063 | } |
1064 | ||
1065 | memlen = ALIGN(max(INIT_FILELEN_MAX, (int)init.filelen * 4), | |
1066 | 1024 * 1024); | |
1067 | err = fastrpc_buf_alloc(fl, fl->sctx->dev, memlen, | |
1068 | &imem); | |
b49f6d83 TE |
1069 | if (err) |
1070 | goto err_alloc; | |
d73f71c7 SK |
1071 | |
1072 | fl->init_mem = imem; | |
1073 | args[0].ptr = (u64)(uintptr_t)&inbuf; | |
1074 | args[0].length = sizeof(inbuf); | |
1075 | args[0].fd = -1; | |
1076 | ||
1077 | args[1].ptr = (u64)(uintptr_t)current->comm; | |
1078 | args[1].length = inbuf.namelen; | |
1079 | args[1].fd = -1; | |
1080 | ||
1081 | args[2].ptr = (u64) init.file; | |
1082 | args[2].length = inbuf.filelen; | |
1083 | args[2].fd = init.filefd; | |
1084 | ||
1085 | pages[0].addr = imem->phys; | |
1086 | pages[0].size = imem->size; | |
1087 | ||
1088 | args[3].ptr = (u64)(uintptr_t) pages; | |
1089 | args[3].length = 1 * sizeof(*pages); | |
1090 | args[3].fd = -1; | |
1091 | ||
1092 | args[4].ptr = (u64)(uintptr_t)&inbuf.attrs; | |
1093 | args[4].length = sizeof(inbuf.attrs); | |
1094 | args[4].fd = -1; | |
1095 | ||
1096 | args[5].ptr = (u64)(uintptr_t) &inbuf.siglen; | |
1097 | args[5].length = sizeof(inbuf.siglen); | |
1098 | args[5].fd = -1; | |
1099 | ||
1100 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE, 4, 0); | |
1101 | if (init.attrs) | |
1102 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE_ATTR, 6, 0); | |
1103 | ||
1104 | err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, | |
1105 | sc, args); | |
b49f6d83 TE |
1106 | if (err) |
1107 | goto err_invoke; | |
1108 | ||
1109 | kfree(args); | |
d73f71c7 | 1110 | |
b49f6d83 TE |
1111 | return 0; |
1112 | ||
1113 | err_invoke: | |
1114 | fl->init_mem = NULL; | |
1115 | fastrpc_buf_free(imem); | |
1116 | err_alloc: | |
1117 | if (map) { | |
1118 | spin_lock(&fl->lock); | |
1119 | list_del(&map->node); | |
1120 | spin_unlock(&fl->lock); | |
d73f71c7 | 1121 | fastrpc_map_put(map); |
d73f71c7 | 1122 | } |
b49f6d83 | 1123 | err: |
d73f71c7 SK |
1124 | kfree(args); |
1125 | ||
1126 | return err; | |
1127 | } | |
1128 | ||
f6f9279f SK |
1129 | static struct fastrpc_session_ctx *fastrpc_session_alloc( |
1130 | struct fastrpc_channel_ctx *cctx) | |
1131 | { | |
1132 | struct fastrpc_session_ctx *session = NULL; | |
977e6c8d | 1133 | unsigned long flags; |
f6f9279f SK |
1134 | int i; |
1135 | ||
977e6c8d | 1136 | spin_lock_irqsave(&cctx->lock, flags); |
f6f9279f SK |
1137 | for (i = 0; i < cctx->sesscount; i++) { |
1138 | if (!cctx->session[i].used && cctx->session[i].valid) { | |
1139 | cctx->session[i].used = true; | |
1140 | session = &cctx->session[i]; | |
1141 | break; | |
1142 | } | |
1143 | } | |
977e6c8d | 1144 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f SK |
1145 | |
1146 | return session; | |
1147 | } | |
1148 | ||
1149 | static void fastrpc_session_free(struct fastrpc_channel_ctx *cctx, | |
1150 | struct fastrpc_session_ctx *session) | |
1151 | { | |
977e6c8d SK |
1152 | unsigned long flags; |
1153 | ||
1154 | spin_lock_irqsave(&cctx->lock, flags); | |
f6f9279f | 1155 | session->used = false; |
977e6c8d | 1156 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f SK |
1157 | } |
1158 | ||
d73f71c7 SK |
1159 | static int fastrpc_release_current_dsp_process(struct fastrpc_user *fl) |
1160 | { | |
1161 | struct fastrpc_invoke_args args[1]; | |
1162 | int tgid = 0; | |
1163 | u32 sc; | |
1164 | ||
1165 | tgid = fl->tgid; | |
1166 | args[0].ptr = (u64)(uintptr_t) &tgid; | |
1167 | args[0].length = sizeof(tgid); | |
1168 | args[0].fd = -1; | |
1169 | args[0].reserved = 0; | |
1170 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_RELEASE, 1, 0); | |
1171 | ||
1172 | return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, | |
1173 | sc, &args[0]); | |
1174 | } | |
1175 | ||
f6f9279f SK |
1176 | static int fastrpc_device_release(struct inode *inode, struct file *file) |
1177 | { | |
1178 | struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; | |
1179 | struct fastrpc_channel_ctx *cctx = fl->cctx; | |
c68cfb71 SK |
1180 | struct fastrpc_invoke_ctx *ctx, *n; |
1181 | struct fastrpc_map *map, *m; | |
2419e55e | 1182 | struct fastrpc_buf *buf, *b; |
977e6c8d | 1183 | unsigned long flags; |
f6f9279f | 1184 | |
d73f71c7 SK |
1185 | fastrpc_release_current_dsp_process(fl); |
1186 | ||
977e6c8d | 1187 | spin_lock_irqsave(&cctx->lock, flags); |
f6f9279f | 1188 | list_del(&fl->user); |
977e6c8d | 1189 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f | 1190 | |
c68cfb71 SK |
1191 | if (fl->init_mem) |
1192 | fastrpc_buf_free(fl->init_mem); | |
1193 | ||
1194 | list_for_each_entry_safe(ctx, n, &fl->pending, node) { | |
1195 | list_del(&ctx->node); | |
1196 | fastrpc_context_put(ctx); | |
1197 | } | |
1198 | ||
1199 | list_for_each_entry_safe(map, m, &fl->maps, node) { | |
1200 | list_del(&map->node); | |
1201 | fastrpc_map_put(map); | |
1202 | } | |
1203 | ||
2419e55e JRO |
1204 | list_for_each_entry_safe(buf, b, &fl->mmaps, node) { |
1205 | list_del(&buf->node); | |
1206 | fastrpc_buf_free(buf); | |
1207 | } | |
1208 | ||
f6f9279f | 1209 | fastrpc_session_free(cctx, fl->sctx); |
278d56f9 | 1210 | fastrpc_channel_ctx_put(cctx); |
f6f9279f SK |
1211 | |
1212 | mutex_destroy(&fl->mutex); | |
1213 | kfree(fl); | |
1214 | file->private_data = NULL; | |
1215 | ||
1216 | return 0; | |
1217 | } | |
1218 | ||
1219 | static int fastrpc_device_open(struct inode *inode, struct file *filp) | |
1220 | { | |
1221 | struct fastrpc_channel_ctx *cctx = miscdev_to_cctx(filp->private_data); | |
1222 | struct fastrpc_user *fl = NULL; | |
977e6c8d | 1223 | unsigned long flags; |
f6f9279f SK |
1224 | |
1225 | fl = kzalloc(sizeof(*fl), GFP_KERNEL); | |
1226 | if (!fl) | |
1227 | return -ENOMEM; | |
1228 | ||
278d56f9 BA |
1229 | /* Released in fastrpc_device_release() */ |
1230 | fastrpc_channel_ctx_get(cctx); | |
1231 | ||
f6f9279f SK |
1232 | filp->private_data = fl; |
1233 | spin_lock_init(&fl->lock); | |
1234 | mutex_init(&fl->mutex); | |
1235 | INIT_LIST_HEAD(&fl->pending); | |
1236 | INIT_LIST_HEAD(&fl->maps); | |
2419e55e | 1237 | INIT_LIST_HEAD(&fl->mmaps); |
f6f9279f SK |
1238 | INIT_LIST_HEAD(&fl->user); |
1239 | fl->tgid = current->tgid; | |
1240 | fl->cctx = cctx; | |
7c11df42 TE |
1241 | |
1242 | fl->sctx = fastrpc_session_alloc(cctx); | |
1243 | if (!fl->sctx) { | |
1244 | dev_err(&cctx->rpdev->dev, "No session available\n"); | |
1245 | mutex_destroy(&fl->mutex); | |
1246 | kfree(fl); | |
1247 | ||
1248 | return -EBUSY; | |
1249 | } | |
1250 | ||
977e6c8d | 1251 | spin_lock_irqsave(&cctx->lock, flags); |
f6f9279f | 1252 | list_add_tail(&fl->user, &cctx->users); |
977e6c8d | 1253 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f SK |
1254 | |
1255 | return 0; | |
1256 | } | |
1257 | ||
6cffd795 SK |
1258 | static int fastrpc_dmabuf_alloc(struct fastrpc_user *fl, char __user *argp) |
1259 | { | |
1260 | struct fastrpc_alloc_dma_buf bp; | |
1261 | DEFINE_DMA_BUF_EXPORT_INFO(exp_info); | |
1262 | struct fastrpc_buf *buf = NULL; | |
1263 | int err; | |
1264 | ||
1265 | if (copy_from_user(&bp, argp, sizeof(bp))) | |
1266 | return -EFAULT; | |
1267 | ||
1268 | err = fastrpc_buf_alloc(fl, fl->sctx->dev, bp.size, &buf); | |
1269 | if (err) | |
1270 | return err; | |
1271 | exp_info.ops = &fastrpc_dma_buf_ops; | |
1272 | exp_info.size = bp.size; | |
1273 | exp_info.flags = O_RDWR; | |
1274 | exp_info.priv = buf; | |
1275 | buf->dmabuf = dma_buf_export(&exp_info); | |
1276 | if (IS_ERR(buf->dmabuf)) { | |
1277 | err = PTR_ERR(buf->dmabuf); | |
1278 | fastrpc_buf_free(buf); | |
1279 | return err; | |
1280 | } | |
1281 | ||
1282 | bp.fd = dma_buf_fd(buf->dmabuf, O_ACCMODE); | |
1283 | if (bp.fd < 0) { | |
1284 | dma_buf_put(buf->dmabuf); | |
1285 | return -EINVAL; | |
1286 | } | |
1287 | ||
1288 | if (copy_to_user(argp, &bp, sizeof(bp))) { | |
10784a2b MK |
1289 | /* |
1290 | * The usercopy failed, but we can't do much about it, as | |
1291 | * dma_buf_fd() already called fd_install() and made the | |
1292 | * file descriptor accessible for the current process. It | |
1293 | * might already be closed and dmabuf no longer valid when | |
1294 | * we reach this point. Therefore "leak" the fd and rely on | |
1295 | * the process exit path to do any required cleanup. | |
1296 | */ | |
6cffd795 SK |
1297 | return -EFAULT; |
1298 | } | |
1299 | ||
6cffd795 SK |
1300 | return 0; |
1301 | } | |
1302 | ||
6010d9be | 1303 | static int fastrpc_init_attach(struct fastrpc_user *fl, int pd) |
d73f71c7 SK |
1304 | { |
1305 | struct fastrpc_invoke_args args[1]; | |
1306 | int tgid = fl->tgid; | |
1307 | u32 sc; | |
1308 | ||
1309 | args[0].ptr = (u64)(uintptr_t) &tgid; | |
1310 | args[0].length = sizeof(tgid); | |
1311 | args[0].fd = -1; | |
1312 | args[0].reserved = 0; | |
1313 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_ATTACH, 1, 0); | |
6010d9be | 1314 | fl->pd = pd; |
d73f71c7 SK |
1315 | |
1316 | return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, | |
1317 | sc, &args[0]); | |
1318 | } | |
1319 | ||
c68cfb71 SK |
1320 | static int fastrpc_invoke(struct fastrpc_user *fl, char __user *argp) |
1321 | { | |
1322 | struct fastrpc_invoke_args *args = NULL; | |
1323 | struct fastrpc_invoke inv; | |
1324 | u32 nscalars; | |
1325 | int err; | |
1326 | ||
1327 | if (copy_from_user(&inv, argp, sizeof(inv))) | |
1328 | return -EFAULT; | |
1329 | ||
1330 | /* nscalars is truncated here to max supported value */ | |
1331 | nscalars = REMOTE_SCALARS_LENGTH(inv.sc); | |
1332 | if (nscalars) { | |
1333 | args = kcalloc(nscalars, sizeof(*args), GFP_KERNEL); | |
1334 | if (!args) | |
1335 | return -ENOMEM; | |
1336 | ||
1337 | if (copy_from_user(args, (void __user *)(uintptr_t)inv.args, | |
1338 | nscalars * sizeof(*args))) { | |
1339 | kfree(args); | |
1340 | return -EFAULT; | |
1341 | } | |
1342 | } | |
1343 | ||
1344 | err = fastrpc_internal_invoke(fl, false, inv.handle, inv.sc, args); | |
1345 | kfree(args); | |
1346 | ||
1347 | return err; | |
1348 | } | |
1349 | ||
2419e55e JRO |
1350 | static int fastrpc_req_munmap_impl(struct fastrpc_user *fl, |
1351 | struct fastrpc_req_munmap *req) | |
1352 | { | |
1353 | struct fastrpc_invoke_args args[1] = { [0] = { 0 } }; | |
1354 | struct fastrpc_buf *buf, *b; | |
1355 | struct fastrpc_munmap_req_msg req_msg; | |
1356 | struct device *dev = fl->sctx->dev; | |
1357 | int err; | |
1358 | u32 sc; | |
1359 | ||
1360 | spin_lock(&fl->lock); | |
1361 | list_for_each_entry_safe(buf, b, &fl->mmaps, node) { | |
1362 | if ((buf->raddr == req->vaddrout) && (buf->size == req->size)) | |
1363 | break; | |
1364 | buf = NULL; | |
1365 | } | |
1366 | spin_unlock(&fl->lock); | |
1367 | ||
1368 | if (!buf) { | |
1369 | dev_err(dev, "mmap not in list\n"); | |
1370 | return -EINVAL; | |
1371 | } | |
1372 | ||
1373 | req_msg.pgid = fl->tgid; | |
1374 | req_msg.size = buf->size; | |
1375 | req_msg.vaddr = buf->raddr; | |
1376 | ||
1377 | args[0].ptr = (u64) (uintptr_t) &req_msg; | |
1378 | args[0].length = sizeof(req_msg); | |
1379 | ||
1380 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MUNMAP, 1, 0); | |
1381 | err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, | |
1382 | &args[0]); | |
1383 | if (!err) { | |
1384 | dev_dbg(dev, "unmmap\tpt 0x%09lx OK\n", buf->raddr); | |
1385 | spin_lock(&fl->lock); | |
1386 | list_del(&buf->node); | |
1387 | spin_unlock(&fl->lock); | |
1388 | fastrpc_buf_free(buf); | |
1389 | } else { | |
1390 | dev_err(dev, "unmmap\tpt 0x%09lx ERROR\n", buf->raddr); | |
1391 | } | |
1392 | ||
1393 | return err; | |
1394 | } | |
1395 | ||
1396 | static int fastrpc_req_munmap(struct fastrpc_user *fl, char __user *argp) | |
1397 | { | |
1398 | struct fastrpc_req_munmap req; | |
1399 | ||
1400 | if (copy_from_user(&req, argp, sizeof(req))) | |
1401 | return -EFAULT; | |
1402 | ||
1403 | return fastrpc_req_munmap_impl(fl, &req); | |
1404 | } | |
1405 | ||
1406 | static int fastrpc_req_mmap(struct fastrpc_user *fl, char __user *argp) | |
1407 | { | |
1408 | struct fastrpc_invoke_args args[3] = { [0 ... 2] = { 0 } }; | |
1409 | struct fastrpc_buf *buf = NULL; | |
1410 | struct fastrpc_mmap_req_msg req_msg; | |
1411 | struct fastrpc_mmap_rsp_msg rsp_msg; | |
1412 | struct fastrpc_req_munmap req_unmap; | |
1413 | struct fastrpc_phy_page pages; | |
1414 | struct fastrpc_req_mmap req; | |
1415 | struct device *dev = fl->sctx->dev; | |
1416 | int err; | |
1417 | u32 sc; | |
1418 | ||
1419 | if (copy_from_user(&req, argp, sizeof(req))) | |
1420 | return -EFAULT; | |
1421 | ||
1422 | if (req.flags != ADSP_MMAP_ADD_PAGES) { | |
1423 | dev_err(dev, "flag not supported 0x%x\n", req.flags); | |
1424 | return -EINVAL; | |
1425 | } | |
1426 | ||
1427 | if (req.vaddrin) { | |
1428 | dev_err(dev, "adding user allocated pages is not supported\n"); | |
1429 | return -EINVAL; | |
1430 | } | |
1431 | ||
1432 | err = fastrpc_buf_alloc(fl, fl->sctx->dev, req.size, &buf); | |
1433 | if (err) { | |
1434 | dev_err(dev, "failed to allocate buffer\n"); | |
1435 | return err; | |
1436 | } | |
1437 | ||
1438 | req_msg.pgid = fl->tgid; | |
1439 | req_msg.flags = req.flags; | |
1440 | req_msg.vaddr = req.vaddrin; | |
1441 | req_msg.num = sizeof(pages); | |
1442 | ||
1443 | args[0].ptr = (u64) (uintptr_t) &req_msg; | |
1444 | args[0].length = sizeof(req_msg); | |
1445 | ||
1446 | pages.addr = buf->phys; | |
1447 | pages.size = buf->size; | |
1448 | ||
1449 | args[1].ptr = (u64) (uintptr_t) &pages; | |
1450 | args[1].length = sizeof(pages); | |
1451 | ||
1452 | args[2].ptr = (u64) (uintptr_t) &rsp_msg; | |
1453 | args[2].length = sizeof(rsp_msg); | |
1454 | ||
1455 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MMAP, 2, 1); | |
1456 | err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, | |
1457 | &args[0]); | |
1458 | if (err) { | |
1459 | dev_err(dev, "mmap error (len 0x%08llx)\n", buf->size); | |
1460 | goto err_invoke; | |
1461 | } | |
1462 | ||
1463 | /* update the buffer to be able to deallocate the memory on the DSP */ | |
1464 | buf->raddr = (uintptr_t) rsp_msg.vaddr; | |
1465 | ||
1466 | /* let the client know the address to use */ | |
1467 | req.vaddrout = rsp_msg.vaddr; | |
1468 | ||
1469 | spin_lock(&fl->lock); | |
1470 | list_add_tail(&buf->node, &fl->mmaps); | |
1471 | spin_unlock(&fl->lock); | |
1472 | ||
1473 | if (copy_to_user((void __user *)argp, &req, sizeof(req))) { | |
1474 | /* unmap the memory and release the buffer */ | |
1475 | req_unmap.vaddrout = buf->raddr; | |
1476 | req_unmap.size = buf->size; | |
1477 | fastrpc_req_munmap_impl(fl, &req_unmap); | |
1478 | return -EFAULT; | |
1479 | } | |
1480 | ||
1481 | dev_dbg(dev, "mmap\t\tpt 0x%09lx OK [len 0x%08llx]\n", | |
1482 | buf->raddr, buf->size); | |
1483 | ||
1484 | return 0; | |
1485 | ||
1486 | err_invoke: | |
1487 | fastrpc_buf_free(buf); | |
1488 | ||
1489 | return err; | |
1490 | } | |
1491 | ||
c68cfb71 SK |
1492 | static long fastrpc_device_ioctl(struct file *file, unsigned int cmd, |
1493 | unsigned long arg) | |
1494 | { | |
1495 | struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; | |
1496 | char __user *argp = (char __user *)arg; | |
1497 | int err; | |
1498 | ||
1499 | switch (cmd) { | |
1500 | case FASTRPC_IOCTL_INVOKE: | |
1501 | err = fastrpc_invoke(fl, argp); | |
1502 | break; | |
d73f71c7 | 1503 | case FASTRPC_IOCTL_INIT_ATTACH: |
6010d9be JM |
1504 | err = fastrpc_init_attach(fl, AUDIO_PD); |
1505 | break; | |
1506 | case FASTRPC_IOCTL_INIT_ATTACH_SNS: | |
1507 | err = fastrpc_init_attach(fl, SENSORS_PD); | |
d73f71c7 SK |
1508 | break; |
1509 | case FASTRPC_IOCTL_INIT_CREATE: | |
1510 | err = fastrpc_init_create_process(fl, argp); | |
1511 | break; | |
6cffd795 SK |
1512 | case FASTRPC_IOCTL_ALLOC_DMA_BUFF: |
1513 | err = fastrpc_dmabuf_alloc(fl, argp); | |
1514 | break; | |
2419e55e JRO |
1515 | case FASTRPC_IOCTL_MMAP: |
1516 | err = fastrpc_req_mmap(fl, argp); | |
1517 | break; | |
1518 | case FASTRPC_IOCTL_MUNMAP: | |
1519 | err = fastrpc_req_munmap(fl, argp); | |
1520 | break; | |
c68cfb71 SK |
1521 | default: |
1522 | err = -ENOTTY; | |
1523 | break; | |
1524 | } | |
1525 | ||
1526 | return err; | |
1527 | } | |
1528 | ||
f6f9279f SK |
1529 | static const struct file_operations fastrpc_fops = { |
1530 | .open = fastrpc_device_open, | |
1531 | .release = fastrpc_device_release, | |
c68cfb71 SK |
1532 | .unlocked_ioctl = fastrpc_device_ioctl, |
1533 | .compat_ioctl = fastrpc_device_ioctl, | |
f6f9279f SK |
1534 | }; |
1535 | ||
1536 | static int fastrpc_cb_probe(struct platform_device *pdev) | |
1537 | { | |
1538 | struct fastrpc_channel_ctx *cctx; | |
1539 | struct fastrpc_session_ctx *sess; | |
1540 | struct device *dev = &pdev->dev; | |
1541 | int i, sessions = 0; | |
977e6c8d | 1542 | unsigned long flags; |
01b76c32 | 1543 | int rc; |
f6f9279f SK |
1544 | |
1545 | cctx = dev_get_drvdata(dev->parent); | |
1546 | if (!cctx) | |
1547 | return -EINVAL; | |
1548 | ||
1549 | of_property_read_u32(dev->of_node, "qcom,nsessions", &sessions); | |
1550 | ||
977e6c8d | 1551 | spin_lock_irqsave(&cctx->lock, flags); |
f6f9279f SK |
1552 | sess = &cctx->session[cctx->sesscount]; |
1553 | sess->used = false; | |
1554 | sess->valid = true; | |
1555 | sess->dev = dev; | |
1556 | dev_set_drvdata(dev, sess); | |
1557 | ||
1558 | if (of_property_read_u32(dev->of_node, "reg", &sess->sid)) | |
1559 | dev_info(dev, "FastRPC Session ID not specified in DT\n"); | |
1560 | ||
1561 | if (sessions > 0) { | |
1562 | struct fastrpc_session_ctx *dup_sess; | |
1563 | ||
1564 | for (i = 1; i < sessions; i++) { | |
1565 | if (cctx->sesscount++ >= FASTRPC_MAX_SESSIONS) | |
1566 | break; | |
1567 | dup_sess = &cctx->session[cctx->sesscount]; | |
1568 | memcpy(dup_sess, sess, sizeof(*dup_sess)); | |
1569 | } | |
1570 | } | |
1571 | cctx->sesscount++; | |
977e6c8d | 1572 | spin_unlock_irqrestore(&cctx->lock, flags); |
01b76c32 BY |
1573 | rc = dma_set_mask(dev, DMA_BIT_MASK(32)); |
1574 | if (rc) { | |
1575 | dev_err(dev, "32-bit DMA enable failed\n"); | |
1576 | return rc; | |
1577 | } | |
f6f9279f SK |
1578 | |
1579 | return 0; | |
1580 | } | |
1581 | ||
1582 | static int fastrpc_cb_remove(struct platform_device *pdev) | |
1583 | { | |
1584 | struct fastrpc_channel_ctx *cctx = dev_get_drvdata(pdev->dev.parent); | |
1585 | struct fastrpc_session_ctx *sess = dev_get_drvdata(&pdev->dev); | |
977e6c8d | 1586 | unsigned long flags; |
f6f9279f SK |
1587 | int i; |
1588 | ||
977e6c8d | 1589 | spin_lock_irqsave(&cctx->lock, flags); |
f6f9279f SK |
1590 | for (i = 1; i < FASTRPC_MAX_SESSIONS; i++) { |
1591 | if (cctx->session[i].sid == sess->sid) { | |
1592 | cctx->session[i].valid = false; | |
1593 | cctx->sesscount--; | |
1594 | } | |
1595 | } | |
977e6c8d | 1596 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f SK |
1597 | |
1598 | return 0; | |
1599 | } | |
1600 | ||
1601 | static const struct of_device_id fastrpc_match_table[] = { | |
1602 | { .compatible = "qcom,fastrpc-compute-cb", }, | |
1603 | {} | |
1604 | }; | |
1605 | ||
1606 | static struct platform_driver fastrpc_cb_driver = { | |
1607 | .probe = fastrpc_cb_probe, | |
1608 | .remove = fastrpc_cb_remove, | |
1609 | .driver = { | |
1610 | .name = "qcom,fastrpc-cb", | |
1611 | .of_match_table = fastrpc_match_table, | |
1612 | .suppress_bind_attrs = true, | |
1613 | }, | |
1614 | }; | |
1615 | ||
1616 | static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev) | |
1617 | { | |
1618 | struct device *rdev = &rpdev->dev; | |
1619 | struct fastrpc_channel_ctx *data; | |
1620 | int i, err, domain_id = -1; | |
1621 | const char *domain; | |
1622 | ||
f6f9279f SK |
1623 | err = of_property_read_string(rdev->of_node, "label", &domain); |
1624 | if (err) { | |
1625 | dev_info(rdev, "FastRPC Domain not specified in DT\n"); | |
1626 | return err; | |
1627 | } | |
1628 | ||
1629 | for (i = 0; i <= CDSP_DOMAIN_ID; i++) { | |
1630 | if (!strcmp(domains[i], domain)) { | |
1631 | domain_id = i; | |
1632 | break; | |
1633 | } | |
1634 | } | |
1635 | ||
1636 | if (domain_id < 0) { | |
1637 | dev_info(rdev, "FastRPC Invalid Domain ID %d\n", domain_id); | |
1638 | return -EINVAL; | |
1639 | } | |
1640 | ||
278d56f9 BA |
1641 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
1642 | if (!data) | |
1643 | return -ENOMEM; | |
1644 | ||
f6f9279f | 1645 | data->miscdev.minor = MISC_DYNAMIC_MINOR; |
2d10d2d1 SK |
1646 | data->miscdev.name = devm_kasprintf(rdev, GFP_KERNEL, "fastrpc-%s", |
1647 | domains[domain_id]); | |
f6f9279f SK |
1648 | data->miscdev.fops = &fastrpc_fops; |
1649 | err = misc_register(&data->miscdev); | |
0978de9f SK |
1650 | if (err) { |
1651 | kfree(data); | |
f6f9279f | 1652 | return err; |
0978de9f | 1653 | } |
f6f9279f | 1654 | |
278d56f9 BA |
1655 | kref_init(&data->refcount); |
1656 | ||
f6f9279f SK |
1657 | dev_set_drvdata(&rpdev->dev, data); |
1658 | dma_set_mask_and_coherent(rdev, DMA_BIT_MASK(32)); | |
1659 | INIT_LIST_HEAD(&data->users); | |
1660 | spin_lock_init(&data->lock); | |
1661 | idr_init(&data->ctx_idr); | |
1662 | data->domain_id = domain_id; | |
1663 | data->rpdev = rpdev; | |
1664 | ||
1665 | return of_platform_populate(rdev->of_node, NULL, NULL, rdev); | |
1666 | } | |
1667 | ||
c68cfb71 SK |
1668 | static void fastrpc_notify_users(struct fastrpc_user *user) |
1669 | { | |
1670 | struct fastrpc_invoke_ctx *ctx; | |
1671 | ||
1672 | spin_lock(&user->lock); | |
1673 | list_for_each_entry(ctx, &user->pending, node) | |
1674 | complete(&ctx->work); | |
1675 | spin_unlock(&user->lock); | |
1676 | } | |
1677 | ||
f6f9279f SK |
1678 | static void fastrpc_rpmsg_remove(struct rpmsg_device *rpdev) |
1679 | { | |
1680 | struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); | |
c68cfb71 | 1681 | struct fastrpc_user *user; |
977e6c8d | 1682 | unsigned long flags; |
c68cfb71 | 1683 | |
977e6c8d | 1684 | spin_lock_irqsave(&cctx->lock, flags); |
c68cfb71 SK |
1685 | list_for_each_entry(user, &cctx->users, user) |
1686 | fastrpc_notify_users(user); | |
977e6c8d | 1687 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f SK |
1688 | |
1689 | misc_deregister(&cctx->miscdev); | |
1690 | of_platform_depopulate(&rpdev->dev); | |
278d56f9 | 1691 | |
2e369878 | 1692 | cctx->rpdev = NULL; |
278d56f9 | 1693 | fastrpc_channel_ctx_put(cctx); |
f6f9279f SK |
1694 | } |
1695 | ||
1696 | static int fastrpc_rpmsg_callback(struct rpmsg_device *rpdev, void *data, | |
1697 | int len, void *priv, u32 addr) | |
1698 | { | |
c68cfb71 SK |
1699 | struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); |
1700 | struct fastrpc_invoke_rsp *rsp = data; | |
1701 | struct fastrpc_invoke_ctx *ctx; | |
1702 | unsigned long flags; | |
1703 | unsigned long ctxid; | |
1704 | ||
1705 | if (len < sizeof(*rsp)) | |
1706 | return -EINVAL; | |
1707 | ||
1708 | ctxid = ((rsp->ctx & FASTRPC_CTXID_MASK) >> 4); | |
1709 | ||
1710 | spin_lock_irqsave(&cctx->lock, flags); | |
1711 | ctx = idr_find(&cctx->ctx_idr, ctxid); | |
1712 | spin_unlock_irqrestore(&cctx->lock, flags); | |
1713 | ||
1714 | if (!ctx) { | |
1715 | dev_err(&rpdev->dev, "No context ID matches response\n"); | |
1716 | return -ENOENT; | |
1717 | } | |
1718 | ||
1719 | ctx->retval = rsp->retval; | |
1720 | complete(&ctx->work); | |
8e7389c7 TE |
1721 | |
1722 | /* | |
1723 | * The DMA buffer associated with the context cannot be freed in | |
1724 | * interrupt context so schedule it through a worker thread to | |
1725 | * avoid a kernel BUG. | |
1726 | */ | |
1727 | schedule_work(&ctx->put_work); | |
c68cfb71 | 1728 | |
f6f9279f SK |
1729 | return 0; |
1730 | } | |
1731 | ||
1732 | static const struct of_device_id fastrpc_rpmsg_of_match[] = { | |
1733 | { .compatible = "qcom,fastrpc" }, | |
1734 | { }, | |
1735 | }; | |
1736 | MODULE_DEVICE_TABLE(of, fastrpc_rpmsg_of_match); | |
1737 | ||
1738 | static struct rpmsg_driver fastrpc_driver = { | |
1739 | .probe = fastrpc_rpmsg_probe, | |
1740 | .remove = fastrpc_rpmsg_remove, | |
1741 | .callback = fastrpc_rpmsg_callback, | |
1742 | .drv = { | |
1743 | .name = "qcom,fastrpc", | |
1744 | .of_match_table = fastrpc_rpmsg_of_match, | |
1745 | }, | |
1746 | }; | |
1747 | ||
1748 | static int fastrpc_init(void) | |
1749 | { | |
1750 | int ret; | |
1751 | ||
1752 | ret = platform_driver_register(&fastrpc_cb_driver); | |
1753 | if (ret < 0) { | |
1754 | pr_err("fastrpc: failed to register cb driver\n"); | |
1755 | return ret; | |
1756 | } | |
1757 | ||
1758 | ret = register_rpmsg_driver(&fastrpc_driver); | |
1759 | if (ret < 0) { | |
1760 | pr_err("fastrpc: failed to register rpmsg driver\n"); | |
1761 | platform_driver_unregister(&fastrpc_cb_driver); | |
1762 | return ret; | |
1763 | } | |
1764 | ||
1765 | return 0; | |
1766 | } | |
1767 | module_init(fastrpc_init); | |
1768 | ||
1769 | static void fastrpc_exit(void) | |
1770 | { | |
1771 | platform_driver_unregister(&fastrpc_cb_driver); | |
1772 | unregister_rpmsg_driver(&fastrpc_driver); | |
1773 | } | |
1774 | module_exit(fastrpc_exit); | |
1775 | ||
1776 | MODULE_LICENSE("GPL v2"); |