Commit | Line | Data |
---|---|---|
f6f9279f SK |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | // Copyright (c) 2011-2018, The Linux Foundation. All rights reserved. | |
3 | // Copyright (c) 2018, Linaro Limited | |
4 | ||
c68cfb71 | 5 | #include <linux/completion.h> |
f6f9279f | 6 | #include <linux/device.h> |
c68cfb71 | 7 | #include <linux/dma-buf.h> |
f6f9279f SK |
8 | #include <linux/dma-mapping.h> |
9 | #include <linux/idr.h> | |
10 | #include <linux/list.h> | |
11 | #include <linux/miscdevice.h> | |
12 | #include <linux/module.h> | |
13 | #include <linux/of_address.h> | |
14 | #include <linux/of.h> | |
25e8dfb8 | 15 | #include <linux/sort.h> |
f6f9279f SK |
16 | #include <linux/of_platform.h> |
17 | #include <linux/rpmsg.h> | |
18 | #include <linux/scatterlist.h> | |
19 | #include <linux/slab.h> | |
c68cfb71 | 20 | #include <uapi/misc/fastrpc.h> |
f6f9279f SK |
21 | |
22 | #define ADSP_DOMAIN_ID (0) | |
23 | #define MDSP_DOMAIN_ID (1) | |
24 | #define SDSP_DOMAIN_ID (2) | |
25 | #define CDSP_DOMAIN_ID (3) | |
26 | #define FASTRPC_DEV_MAX 4 /* adsp, mdsp, slpi, cdsp*/ | |
27 | #define FASTRPC_MAX_SESSIONS 9 /*8 compute, 1 cpz*/ | |
c68cfb71 SK |
28 | #define FASTRPC_ALIGN 128 |
29 | #define FASTRPC_MAX_FDLIST 16 | |
30 | #define FASTRPC_MAX_CRCLIST 64 | |
31 | #define FASTRPC_PHYS(p) ((p) & 0xffffffff) | |
f6f9279f | 32 | #define FASTRPC_CTX_MAX (256) |
d73f71c7 | 33 | #define FASTRPC_INIT_HANDLE 1 |
f6f9279f | 34 | #define FASTRPC_CTXID_MASK (0xFF0) |
f1cf11c2 | 35 | #define INIT_FILELEN_MAX (64 * 1024 * 1024) |
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 | ||
f6f9279f SK |
76 | #define miscdev_to_cctx(d) container_of(d, struct fastrpc_channel_ctx, miscdev) |
77 | ||
78 | static const char *domains[FASTRPC_DEV_MAX] = { "adsp", "mdsp", | |
79 | "sdsp", "cdsp"}; | |
c68cfb71 SK |
80 | struct fastrpc_phy_page { |
81 | u64 addr; /* physical address */ | |
82 | u64 size; /* size of contiguous region */ | |
83 | }; | |
84 | ||
85 | struct fastrpc_invoke_buf { | |
86 | u32 num; /* number of contiguous regions */ | |
87 | u32 pgidx; /* index to start of contiguous region */ | |
88 | }; | |
89 | ||
90 | struct fastrpc_remote_arg { | |
91 | u64 pv; | |
92 | u64 len; | |
93 | }; | |
94 | ||
2419e55e JRO |
95 | struct fastrpc_mmap_rsp_msg { |
96 | u64 vaddr; | |
97 | }; | |
98 | ||
99 | struct fastrpc_mmap_req_msg { | |
100 | s32 pgid; | |
101 | u32 flags; | |
102 | u64 vaddr; | |
103 | s32 num; | |
104 | }; | |
105 | ||
106 | struct fastrpc_munmap_req_msg { | |
107 | s32 pgid; | |
108 | u64 vaddr; | |
109 | u64 size; | |
110 | }; | |
111 | ||
c68cfb71 SK |
112 | struct fastrpc_msg { |
113 | int pid; /* process group id */ | |
114 | int tid; /* thread id */ | |
115 | u64 ctx; /* invoke caller context */ | |
116 | u32 handle; /* handle to invoke */ | |
117 | u32 sc; /* scalars structure describing the data */ | |
118 | u64 addr; /* physical address */ | |
119 | u64 size; /* size of contiguous region */ | |
120 | }; | |
121 | ||
122 | struct fastrpc_invoke_rsp { | |
123 | u64 ctx; /* invoke caller context */ | |
124 | int retval; /* invoke return value */ | |
125 | }; | |
126 | ||
25e8dfb8 SK |
127 | struct fastrpc_buf_overlap { |
128 | u64 start; | |
129 | u64 end; | |
130 | int raix; | |
131 | u64 mstart; | |
132 | u64 mend; | |
133 | u64 offset; | |
134 | }; | |
135 | ||
c68cfb71 SK |
136 | struct fastrpc_buf { |
137 | struct fastrpc_user *fl; | |
6cffd795 | 138 | struct dma_buf *dmabuf; |
c68cfb71 SK |
139 | struct device *dev; |
140 | void *virt; | |
141 | u64 phys; | |
142 | u64 size; | |
6cffd795 SK |
143 | /* Lock for dma buf attachments */ |
144 | struct mutex lock; | |
145 | struct list_head attachments; | |
2419e55e JRO |
146 | /* mmap support */ |
147 | struct list_head node; /* list of user requested mmaps */ | |
148 | uintptr_t raddr; | |
6cffd795 SK |
149 | }; |
150 | ||
151 | struct fastrpc_dma_buf_attachment { | |
152 | struct device *dev; | |
153 | struct sg_table sgt; | |
154 | struct list_head node; | |
c68cfb71 SK |
155 | }; |
156 | ||
157 | struct fastrpc_map { | |
158 | struct list_head node; | |
159 | struct fastrpc_user *fl; | |
160 | int fd; | |
161 | struct dma_buf *buf; | |
162 | struct sg_table *table; | |
163 | struct dma_buf_attachment *attach; | |
164 | u64 phys; | |
165 | u64 size; | |
166 | void *va; | |
167 | u64 len; | |
168 | struct kref refcount; | |
169 | }; | |
170 | ||
171 | struct fastrpc_invoke_ctx { | |
172 | int nscalars; | |
173 | int nbufs; | |
174 | int retval; | |
175 | int pid; | |
176 | int tgid; | |
177 | u32 sc; | |
178 | u32 *crc; | |
179 | u64 ctxid; | |
180 | u64 msg_sz; | |
181 | struct kref refcount; | |
182 | struct list_head node; /* list of ctxs */ | |
183 | struct completion work; | |
8e7389c7 | 184 | struct work_struct put_work; |
c68cfb71 SK |
185 | struct fastrpc_msg msg; |
186 | struct fastrpc_user *fl; | |
187 | struct fastrpc_remote_arg *rpra; | |
188 | struct fastrpc_map **maps; | |
189 | struct fastrpc_buf *buf; | |
190 | struct fastrpc_invoke_args *args; | |
25e8dfb8 | 191 | struct fastrpc_buf_overlap *olaps; |
c68cfb71 SK |
192 | struct fastrpc_channel_ctx *cctx; |
193 | }; | |
f6f9279f SK |
194 | |
195 | struct fastrpc_session_ctx { | |
196 | struct device *dev; | |
197 | int sid; | |
198 | bool used; | |
199 | bool valid; | |
200 | }; | |
201 | ||
202 | struct fastrpc_channel_ctx { | |
203 | int domain_id; | |
204 | int sesscount; | |
205 | struct rpmsg_device *rpdev; | |
206 | struct fastrpc_session_ctx session[FASTRPC_MAX_SESSIONS]; | |
207 | spinlock_t lock; | |
208 | struct idr ctx_idr; | |
209 | struct list_head users; | |
210 | struct miscdevice miscdev; | |
278d56f9 | 211 | struct kref refcount; |
f6f9279f SK |
212 | }; |
213 | ||
214 | struct fastrpc_user { | |
215 | struct list_head user; | |
216 | struct list_head maps; | |
217 | struct list_head pending; | |
2419e55e | 218 | struct list_head mmaps; |
f6f9279f SK |
219 | |
220 | struct fastrpc_channel_ctx *cctx; | |
221 | struct fastrpc_session_ctx *sctx; | |
c68cfb71 | 222 | struct fastrpc_buf *init_mem; |
f6f9279f SK |
223 | |
224 | int tgid; | |
225 | int pd; | |
226 | /* Lock for lists */ | |
227 | spinlock_t lock; | |
228 | /* lock for allocations */ | |
229 | struct mutex mutex; | |
230 | }; | |
231 | ||
c68cfb71 SK |
232 | static void fastrpc_free_map(struct kref *ref) |
233 | { | |
234 | struct fastrpc_map *map; | |
235 | ||
236 | map = container_of(ref, struct fastrpc_map, refcount); | |
237 | ||
238 | if (map->table) { | |
239 | dma_buf_unmap_attachment(map->attach, map->table, | |
240 | DMA_BIDIRECTIONAL); | |
241 | dma_buf_detach(map->buf, map->attach); | |
242 | dma_buf_put(map->buf); | |
243 | } | |
244 | ||
245 | kfree(map); | |
246 | } | |
247 | ||
248 | static void fastrpc_map_put(struct fastrpc_map *map) | |
249 | { | |
250 | if (map) | |
251 | kref_put(&map->refcount, fastrpc_free_map); | |
252 | } | |
253 | ||
254 | static void fastrpc_map_get(struct fastrpc_map *map) | |
255 | { | |
256 | if (map) | |
257 | kref_get(&map->refcount); | |
258 | } | |
259 | ||
260 | static int fastrpc_map_find(struct fastrpc_user *fl, int fd, | |
261 | struct fastrpc_map **ppmap) | |
262 | { | |
263 | struct fastrpc_map *map = NULL; | |
264 | ||
265 | mutex_lock(&fl->mutex); | |
266 | list_for_each_entry(map, &fl->maps, node) { | |
267 | if (map->fd == fd) { | |
268 | fastrpc_map_get(map); | |
269 | *ppmap = map; | |
270 | mutex_unlock(&fl->mutex); | |
271 | return 0; | |
272 | } | |
273 | } | |
274 | mutex_unlock(&fl->mutex); | |
275 | ||
276 | return -ENOENT; | |
277 | } | |
278 | ||
279 | static void fastrpc_buf_free(struct fastrpc_buf *buf) | |
280 | { | |
281 | dma_free_coherent(buf->dev, buf->size, buf->virt, | |
282 | FASTRPC_PHYS(buf->phys)); | |
283 | kfree(buf); | |
284 | } | |
285 | ||
286 | static int fastrpc_buf_alloc(struct fastrpc_user *fl, struct device *dev, | |
287 | u64 size, struct fastrpc_buf **obuf) | |
288 | { | |
289 | struct fastrpc_buf *buf; | |
290 | ||
291 | buf = kzalloc(sizeof(*buf), GFP_KERNEL); | |
292 | if (!buf) | |
293 | return -ENOMEM; | |
294 | ||
6cffd795 | 295 | INIT_LIST_HEAD(&buf->attachments); |
2419e55e | 296 | INIT_LIST_HEAD(&buf->node); |
6cffd795 SK |
297 | mutex_init(&buf->lock); |
298 | ||
c68cfb71 SK |
299 | buf->fl = fl; |
300 | buf->virt = NULL; | |
301 | buf->phys = 0; | |
302 | buf->size = size; | |
303 | buf->dev = dev; | |
2419e55e | 304 | buf->raddr = 0; |
c68cfb71 SK |
305 | |
306 | buf->virt = dma_alloc_coherent(dev, buf->size, (dma_addr_t *)&buf->phys, | |
307 | GFP_KERNEL); | |
41db5f83 JRO |
308 | if (!buf->virt) { |
309 | mutex_destroy(&buf->lock); | |
310 | kfree(buf); | |
c68cfb71 | 311 | return -ENOMEM; |
41db5f83 | 312 | } |
c68cfb71 SK |
313 | |
314 | if (fl->sctx && fl->sctx->sid) | |
315 | buf->phys += ((u64)fl->sctx->sid << 32); | |
316 | ||
317 | *obuf = buf; | |
318 | ||
319 | return 0; | |
320 | } | |
321 | ||
278d56f9 BA |
322 | static void fastrpc_channel_ctx_free(struct kref *ref) |
323 | { | |
324 | struct fastrpc_channel_ctx *cctx; | |
325 | ||
326 | cctx = container_of(ref, struct fastrpc_channel_ctx, refcount); | |
327 | ||
328 | kfree(cctx); | |
329 | } | |
330 | ||
331 | static void fastrpc_channel_ctx_get(struct fastrpc_channel_ctx *cctx) | |
332 | { | |
333 | kref_get(&cctx->refcount); | |
334 | } | |
335 | ||
336 | static void fastrpc_channel_ctx_put(struct fastrpc_channel_ctx *cctx) | |
337 | { | |
338 | kref_put(&cctx->refcount, fastrpc_channel_ctx_free); | |
339 | } | |
340 | ||
c68cfb71 SK |
341 | static void fastrpc_context_free(struct kref *ref) |
342 | { | |
343 | struct fastrpc_invoke_ctx *ctx; | |
344 | struct fastrpc_channel_ctx *cctx; | |
977e6c8d | 345 | unsigned long flags; |
c68cfb71 SK |
346 | int i; |
347 | ||
348 | ctx = container_of(ref, struct fastrpc_invoke_ctx, refcount); | |
349 | cctx = ctx->cctx; | |
350 | ||
351 | for (i = 0; i < ctx->nscalars; i++) | |
352 | fastrpc_map_put(ctx->maps[i]); | |
353 | ||
354 | if (ctx->buf) | |
355 | fastrpc_buf_free(ctx->buf); | |
356 | ||
977e6c8d | 357 | spin_lock_irqsave(&cctx->lock, flags); |
c68cfb71 | 358 | idr_remove(&cctx->ctx_idr, ctx->ctxid >> 4); |
977e6c8d | 359 | spin_unlock_irqrestore(&cctx->lock, flags); |
c68cfb71 SK |
360 | |
361 | kfree(ctx->maps); | |
25e8dfb8 | 362 | kfree(ctx->olaps); |
c68cfb71 | 363 | kfree(ctx); |
278d56f9 BA |
364 | |
365 | fastrpc_channel_ctx_put(cctx); | |
c68cfb71 SK |
366 | } |
367 | ||
368 | static void fastrpc_context_get(struct fastrpc_invoke_ctx *ctx) | |
369 | { | |
370 | kref_get(&ctx->refcount); | |
371 | } | |
372 | ||
373 | static void fastrpc_context_put(struct fastrpc_invoke_ctx *ctx) | |
374 | { | |
375 | kref_put(&ctx->refcount, fastrpc_context_free); | |
376 | } | |
377 | ||
8e7389c7 TE |
378 | static void fastrpc_context_put_wq(struct work_struct *work) |
379 | { | |
380 | struct fastrpc_invoke_ctx *ctx = | |
381 | container_of(work, struct fastrpc_invoke_ctx, put_work); | |
382 | ||
383 | fastrpc_context_put(ctx); | |
384 | } | |
385 | ||
25e8dfb8 SK |
386 | #define CMP(aa, bb) ((aa) == (bb) ? 0 : (aa) < (bb) ? -1 : 1) |
387 | static int olaps_cmp(const void *a, const void *b) | |
388 | { | |
389 | struct fastrpc_buf_overlap *pa = (struct fastrpc_buf_overlap *)a; | |
390 | struct fastrpc_buf_overlap *pb = (struct fastrpc_buf_overlap *)b; | |
391 | /* sort with lowest starting buffer first */ | |
392 | int st = CMP(pa->start, pb->start); | |
393 | /* sort with highest ending buffer first */ | |
394 | int ed = CMP(pb->end, pa->end); | |
395 | ||
396 | return st == 0 ? ed : st; | |
397 | } | |
398 | ||
399 | static void fastrpc_get_buff_overlaps(struct fastrpc_invoke_ctx *ctx) | |
400 | { | |
401 | u64 max_end = 0; | |
402 | int i; | |
403 | ||
404 | for (i = 0; i < ctx->nbufs; ++i) { | |
405 | ctx->olaps[i].start = ctx->args[i].ptr; | |
406 | ctx->olaps[i].end = ctx->olaps[i].start + ctx->args[i].length; | |
407 | ctx->olaps[i].raix = i; | |
408 | } | |
409 | ||
410 | sort(ctx->olaps, ctx->nbufs, sizeof(*ctx->olaps), olaps_cmp, NULL); | |
411 | ||
412 | for (i = 0; i < ctx->nbufs; ++i) { | |
413 | /* Falling inside previous range */ | |
414 | if (ctx->olaps[i].start < max_end) { | |
415 | ctx->olaps[i].mstart = max_end; | |
416 | ctx->olaps[i].mend = ctx->olaps[i].end; | |
417 | ctx->olaps[i].offset = max_end - ctx->olaps[i].start; | |
418 | ||
419 | if (ctx->olaps[i].end > max_end) { | |
420 | max_end = ctx->olaps[i].end; | |
421 | } else { | |
422 | ctx->olaps[i].mend = 0; | |
423 | ctx->olaps[i].mstart = 0; | |
424 | } | |
425 | ||
426 | } else { | |
427 | ctx->olaps[i].mend = ctx->olaps[i].end; | |
428 | ctx->olaps[i].mstart = ctx->olaps[i].start; | |
429 | ctx->olaps[i].offset = 0; | |
430 | max_end = ctx->olaps[i].end; | |
431 | } | |
432 | } | |
433 | } | |
434 | ||
c68cfb71 SK |
435 | static struct fastrpc_invoke_ctx *fastrpc_context_alloc( |
436 | struct fastrpc_user *user, u32 kernel, u32 sc, | |
437 | struct fastrpc_invoke_args *args) | |
438 | { | |
439 | struct fastrpc_channel_ctx *cctx = user->cctx; | |
440 | struct fastrpc_invoke_ctx *ctx = NULL; | |
977e6c8d | 441 | unsigned long flags; |
c68cfb71 SK |
442 | int ret; |
443 | ||
444 | ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); | |
445 | if (!ctx) | |
446 | return ERR_PTR(-ENOMEM); | |
447 | ||
448 | INIT_LIST_HEAD(&ctx->node); | |
449 | ctx->fl = user; | |
450 | ctx->nscalars = REMOTE_SCALARS_LENGTH(sc); | |
451 | ctx->nbufs = REMOTE_SCALARS_INBUFS(sc) + | |
452 | REMOTE_SCALARS_OUTBUFS(sc); | |
453 | ||
454 | if (ctx->nscalars) { | |
455 | ctx->maps = kcalloc(ctx->nscalars, | |
456 | sizeof(*ctx->maps), GFP_KERNEL); | |
457 | if (!ctx->maps) { | |
458 | kfree(ctx); | |
459 | return ERR_PTR(-ENOMEM); | |
460 | } | |
25e8dfb8 SK |
461 | ctx->olaps = kcalloc(ctx->nscalars, |
462 | sizeof(*ctx->olaps), GFP_KERNEL); | |
463 | if (!ctx->olaps) { | |
464 | kfree(ctx->maps); | |
465 | kfree(ctx); | |
466 | return ERR_PTR(-ENOMEM); | |
467 | } | |
c68cfb71 | 468 | ctx->args = args; |
25e8dfb8 | 469 | fastrpc_get_buff_overlaps(ctx); |
c68cfb71 SK |
470 | } |
471 | ||
278d56f9 BA |
472 | /* Released in fastrpc_context_put() */ |
473 | fastrpc_channel_ctx_get(cctx); | |
474 | ||
c68cfb71 SK |
475 | ctx->sc = sc; |
476 | ctx->retval = -1; | |
477 | ctx->pid = current->pid; | |
478 | ctx->tgid = user->tgid; | |
479 | ctx->cctx = cctx; | |
480 | init_completion(&ctx->work); | |
8e7389c7 | 481 | INIT_WORK(&ctx->put_work, fastrpc_context_put_wq); |
c68cfb71 SK |
482 | |
483 | spin_lock(&user->lock); | |
484 | list_add_tail(&ctx->node, &user->pending); | |
485 | spin_unlock(&user->lock); | |
486 | ||
977e6c8d | 487 | spin_lock_irqsave(&cctx->lock, flags); |
c68cfb71 SK |
488 | ret = idr_alloc_cyclic(&cctx->ctx_idr, ctx, 1, |
489 | FASTRPC_CTX_MAX, GFP_ATOMIC); | |
490 | if (ret < 0) { | |
977e6c8d | 491 | spin_unlock_irqrestore(&cctx->lock, flags); |
c68cfb71 SK |
492 | goto err_idr; |
493 | } | |
494 | ctx->ctxid = ret << 4; | |
977e6c8d | 495 | spin_unlock_irqrestore(&cctx->lock, flags); |
c68cfb71 SK |
496 | |
497 | kref_init(&ctx->refcount); | |
498 | ||
499 | return ctx; | |
500 | err_idr: | |
501 | spin_lock(&user->lock); | |
502 | list_del(&ctx->node); | |
503 | spin_unlock(&user->lock); | |
278d56f9 | 504 | fastrpc_channel_ctx_put(cctx); |
c68cfb71 | 505 | kfree(ctx->maps); |
25e8dfb8 | 506 | kfree(ctx->olaps); |
c68cfb71 SK |
507 | kfree(ctx); |
508 | ||
509 | return ERR_PTR(ret); | |
510 | } | |
511 | ||
6cffd795 SK |
512 | static struct sg_table * |
513 | fastrpc_map_dma_buf(struct dma_buf_attachment *attachment, | |
514 | enum dma_data_direction dir) | |
515 | { | |
516 | struct fastrpc_dma_buf_attachment *a = attachment->priv; | |
517 | struct sg_table *table; | |
518 | ||
519 | table = &a->sgt; | |
520 | ||
521 | if (!dma_map_sg(attachment->dev, table->sgl, table->nents, dir)) | |
522 | return ERR_PTR(-ENOMEM); | |
523 | ||
524 | return table; | |
525 | } | |
526 | ||
527 | static void fastrpc_unmap_dma_buf(struct dma_buf_attachment *attach, | |
528 | struct sg_table *table, | |
529 | enum dma_data_direction dir) | |
530 | { | |
531 | dma_unmap_sg(attach->dev, table->sgl, table->nents, dir); | |
532 | } | |
533 | ||
534 | static void fastrpc_release(struct dma_buf *dmabuf) | |
535 | { | |
536 | struct fastrpc_buf *buffer = dmabuf->priv; | |
537 | ||
538 | fastrpc_buf_free(buffer); | |
539 | } | |
540 | ||
541 | static int fastrpc_dma_buf_attach(struct dma_buf *dmabuf, | |
542 | struct dma_buf_attachment *attachment) | |
543 | { | |
544 | struct fastrpc_dma_buf_attachment *a; | |
545 | struct fastrpc_buf *buffer = dmabuf->priv; | |
546 | int ret; | |
547 | ||
548 | a = kzalloc(sizeof(*a), GFP_KERNEL); | |
549 | if (!a) | |
550 | return -ENOMEM; | |
551 | ||
552 | ret = dma_get_sgtable(buffer->dev, &a->sgt, buffer->virt, | |
553 | FASTRPC_PHYS(buffer->phys), buffer->size); | |
554 | if (ret < 0) { | |
555 | dev_err(buffer->dev, "failed to get scatterlist from DMA API\n"); | |
556 | return -EINVAL; | |
557 | } | |
558 | ||
559 | a->dev = attachment->dev; | |
560 | INIT_LIST_HEAD(&a->node); | |
561 | attachment->priv = a; | |
562 | ||
563 | mutex_lock(&buffer->lock); | |
564 | list_add(&a->node, &buffer->attachments); | |
565 | mutex_unlock(&buffer->lock); | |
566 | ||
567 | return 0; | |
568 | } | |
569 | ||
570 | static void fastrpc_dma_buf_detatch(struct dma_buf *dmabuf, | |
571 | struct dma_buf_attachment *attachment) | |
572 | { | |
573 | struct fastrpc_dma_buf_attachment *a = attachment->priv; | |
574 | struct fastrpc_buf *buffer = dmabuf->priv; | |
575 | ||
576 | mutex_lock(&buffer->lock); | |
577 | list_del(&a->node); | |
578 | mutex_unlock(&buffer->lock); | |
cf61860e | 579 | sg_free_table(&a->sgt); |
6cffd795 SK |
580 | kfree(a); |
581 | } | |
582 | ||
583 | static void *fastrpc_kmap(struct dma_buf *dmabuf, unsigned long pgnum) | |
584 | { | |
585 | struct fastrpc_buf *buf = dmabuf->priv; | |
586 | ||
587 | return buf->virt ? buf->virt + pgnum * PAGE_SIZE : NULL; | |
588 | } | |
589 | ||
590 | static void *fastrpc_vmap(struct dma_buf *dmabuf) | |
591 | { | |
592 | struct fastrpc_buf *buf = dmabuf->priv; | |
593 | ||
594 | return buf->virt; | |
595 | } | |
596 | ||
597 | static int fastrpc_mmap(struct dma_buf *dmabuf, | |
598 | struct vm_area_struct *vma) | |
599 | { | |
600 | struct fastrpc_buf *buf = dmabuf->priv; | |
601 | size_t size = vma->vm_end - vma->vm_start; | |
602 | ||
603 | return dma_mmap_coherent(buf->dev, vma, buf->virt, | |
604 | FASTRPC_PHYS(buf->phys), size); | |
605 | } | |
606 | ||
607 | static const struct dma_buf_ops fastrpc_dma_buf_ops = { | |
608 | .attach = fastrpc_dma_buf_attach, | |
609 | .detach = fastrpc_dma_buf_detatch, | |
610 | .map_dma_buf = fastrpc_map_dma_buf, | |
611 | .unmap_dma_buf = fastrpc_unmap_dma_buf, | |
612 | .mmap = fastrpc_mmap, | |
613 | .map = fastrpc_kmap, | |
614 | .vmap = fastrpc_vmap, | |
615 | .release = fastrpc_release, | |
616 | }; | |
617 | ||
c68cfb71 SK |
618 | static int fastrpc_map_create(struct fastrpc_user *fl, int fd, |
619 | u64 len, struct fastrpc_map **ppmap) | |
620 | { | |
621 | struct fastrpc_session_ctx *sess = fl->sctx; | |
622 | struct fastrpc_map *map = NULL; | |
623 | int err = 0; | |
624 | ||
625 | if (!fastrpc_map_find(fl, fd, ppmap)) | |
626 | return 0; | |
627 | ||
628 | map = kzalloc(sizeof(*map), GFP_KERNEL); | |
629 | if (!map) | |
630 | return -ENOMEM; | |
631 | ||
632 | INIT_LIST_HEAD(&map->node); | |
633 | map->fl = fl; | |
634 | map->fd = fd; | |
635 | map->buf = dma_buf_get(fd); | |
682a6044 WY |
636 | if (IS_ERR(map->buf)) { |
637 | err = PTR_ERR(map->buf); | |
c68cfb71 SK |
638 | goto get_err; |
639 | } | |
640 | ||
641 | map->attach = dma_buf_attach(map->buf, sess->dev); | |
642 | if (IS_ERR(map->attach)) { | |
643 | dev_err(sess->dev, "Failed to attach dmabuf\n"); | |
644 | err = PTR_ERR(map->attach); | |
645 | goto attach_err; | |
646 | } | |
647 | ||
648 | map->table = dma_buf_map_attachment(map->attach, DMA_BIDIRECTIONAL); | |
649 | if (IS_ERR(map->table)) { | |
650 | err = PTR_ERR(map->table); | |
651 | goto map_err; | |
652 | } | |
653 | ||
654 | map->phys = sg_dma_address(map->table->sgl); | |
655 | map->phys += ((u64)fl->sctx->sid << 32); | |
656 | map->size = len; | |
657 | map->va = sg_virt(map->table->sgl); | |
658 | map->len = len; | |
659 | kref_init(&map->refcount); | |
660 | ||
661 | spin_lock(&fl->lock); | |
662 | list_add_tail(&map->node, &fl->maps); | |
663 | spin_unlock(&fl->lock); | |
664 | *ppmap = map; | |
665 | ||
666 | return 0; | |
667 | ||
668 | map_err: | |
669 | dma_buf_detach(map->buf, map->attach); | |
670 | attach_err: | |
671 | dma_buf_put(map->buf); | |
672 | get_err: | |
673 | kfree(map); | |
674 | ||
675 | return err; | |
676 | } | |
677 | ||
678 | /* | |
679 | * Fastrpc payload buffer with metadata looks like: | |
680 | * | |
681 | * >>>>>> START of METADATA <<<<<<<<< | |
682 | * +---------------------------------+ | |
683 | * | Arguments | | |
684 | * | type:(struct fastrpc_remote_arg)| | |
685 | * | (0 - N) | | |
686 | * +---------------------------------+ | |
687 | * | Invoke Buffer list | | |
688 | * | type:(struct fastrpc_invoke_buf)| | |
689 | * | (0 - N) | | |
690 | * +---------------------------------+ | |
691 | * | Page info list | | |
692 | * | type:(struct fastrpc_phy_page) | | |
693 | * | (0 - N) | | |
694 | * +---------------------------------+ | |
695 | * | Optional info | | |
696 | * |(can be specific to SoC/Firmware)| | |
697 | * +---------------------------------+ | |
698 | * >>>>>>>> END of METADATA <<<<<<<<< | |
699 | * +---------------------------------+ | |
700 | * | Inline ARGS | | |
701 | * | (0-N) | | |
702 | * +---------------------------------+ | |
703 | */ | |
704 | ||
705 | static int fastrpc_get_meta_size(struct fastrpc_invoke_ctx *ctx) | |
706 | { | |
707 | int size = 0; | |
708 | ||
709 | size = (sizeof(struct fastrpc_remote_arg) + | |
710 | sizeof(struct fastrpc_invoke_buf) + | |
711 | sizeof(struct fastrpc_phy_page)) * ctx->nscalars + | |
712 | sizeof(u64) * FASTRPC_MAX_FDLIST + | |
713 | sizeof(u32) * FASTRPC_MAX_CRCLIST; | |
714 | ||
715 | return size; | |
716 | } | |
717 | ||
718 | static u64 fastrpc_get_payload_size(struct fastrpc_invoke_ctx *ctx, int metalen) | |
719 | { | |
720 | u64 size = 0; | |
721 | int i; | |
722 | ||
723 | size = ALIGN(metalen, FASTRPC_ALIGN); | |
724 | for (i = 0; i < ctx->nscalars; i++) { | |
725 | if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1) { | |
25e8dfb8 SK |
726 | |
727 | if (ctx->olaps[i].offset == 0) | |
728 | size = ALIGN(size, FASTRPC_ALIGN); | |
729 | ||
730 | size += (ctx->olaps[i].mend - ctx->olaps[i].mstart); | |
c68cfb71 SK |
731 | } |
732 | } | |
733 | ||
734 | return size; | |
735 | } | |
736 | ||
737 | static int fastrpc_create_maps(struct fastrpc_invoke_ctx *ctx) | |
738 | { | |
739 | struct device *dev = ctx->fl->sctx->dev; | |
740 | int i, err; | |
741 | ||
742 | for (i = 0; i < ctx->nscalars; ++i) { | |
743 | /* Make sure reserved field is set to 0 */ | |
744 | if (ctx->args[i].reserved) | |
745 | return -EINVAL; | |
746 | ||
747 | if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1 || | |
748 | ctx->args[i].length == 0) | |
749 | continue; | |
750 | ||
751 | err = fastrpc_map_create(ctx->fl, ctx->args[i].fd, | |
752 | ctx->args[i].length, &ctx->maps[i]); | |
753 | if (err) { | |
754 | dev_err(dev, "Error Creating map %d\n", err); | |
755 | return -EINVAL; | |
756 | } | |
757 | ||
758 | } | |
759 | return 0; | |
760 | } | |
761 | ||
762 | static int fastrpc_get_args(u32 kernel, struct fastrpc_invoke_ctx *ctx) | |
763 | { | |
764 | struct device *dev = ctx->fl->sctx->dev; | |
765 | struct fastrpc_remote_arg *rpra; | |
766 | struct fastrpc_invoke_buf *list; | |
767 | struct fastrpc_phy_page *pages; | |
25e8dfb8 SK |
768 | int inbufs, i, oix, err = 0; |
769 | u64 len, rlen, pkt_size; | |
02b45b47 | 770 | u64 pg_start, pg_end; |
c68cfb71 SK |
771 | uintptr_t args; |
772 | int metalen; | |
773 | ||
c68cfb71 SK |
774 | inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); |
775 | metalen = fastrpc_get_meta_size(ctx); | |
776 | pkt_size = fastrpc_get_payload_size(ctx, metalen); | |
777 | ||
778 | err = fastrpc_create_maps(ctx); | |
779 | if (err) | |
780 | return err; | |
781 | ||
782 | ctx->msg_sz = pkt_size; | |
783 | ||
784 | err = fastrpc_buf_alloc(ctx->fl, dev, pkt_size, &ctx->buf); | |
785 | if (err) | |
786 | return err; | |
787 | ||
788 | rpra = ctx->buf->virt; | |
789 | list = ctx->buf->virt + ctx->nscalars * sizeof(*rpra); | |
790 | pages = ctx->buf->virt + ctx->nscalars * (sizeof(*list) + | |
791 | sizeof(*rpra)); | |
792 | args = (uintptr_t)ctx->buf->virt + metalen; | |
793 | rlen = pkt_size - metalen; | |
794 | ctx->rpra = rpra; | |
795 | ||
25e8dfb8 SK |
796 | for (oix = 0; oix < ctx->nbufs; ++oix) { |
797 | int mlen; | |
798 | ||
799 | i = ctx->olaps[oix].raix; | |
800 | len = ctx->args[i].length; | |
c68cfb71 SK |
801 | |
802 | rpra[i].pv = 0; | |
803 | rpra[i].len = len; | |
804 | list[i].num = len ? 1 : 0; | |
805 | list[i].pgidx = i; | |
806 | ||
807 | if (!len) | |
808 | continue; | |
809 | ||
c68cfb71 | 810 | if (ctx->maps[i]) { |
80f3afd7 SK |
811 | struct vm_area_struct *vma = NULL; |
812 | ||
c68cfb71 SK |
813 | rpra[i].pv = (u64) ctx->args[i].ptr; |
814 | pages[i].addr = ctx->maps[i]->phys; | |
80f3afd7 SK |
815 | |
816 | vma = find_vma(current->mm, ctx->args[i].ptr); | |
817 | if (vma) | |
818 | pages[i].addr += ctx->args[i].ptr - | |
819 | vma->vm_start; | |
820 | ||
02b45b47 SK |
821 | pg_start = (ctx->args[i].ptr & PAGE_MASK) >> PAGE_SHIFT; |
822 | pg_end = ((ctx->args[i].ptr + len - 1) & PAGE_MASK) >> | |
823 | PAGE_SHIFT; | |
824 | pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; | |
825 | ||
c68cfb71 | 826 | } else { |
25e8dfb8 SK |
827 | |
828 | if (ctx->olaps[oix].offset == 0) { | |
829 | rlen -= ALIGN(args, FASTRPC_ALIGN) - args; | |
830 | args = ALIGN(args, FASTRPC_ALIGN); | |
831 | } | |
832 | ||
833 | mlen = ctx->olaps[oix].mend - ctx->olaps[oix].mstart; | |
834 | ||
835 | if (rlen < mlen) | |
c68cfb71 SK |
836 | goto bail; |
837 | ||
25e8dfb8 SK |
838 | rpra[i].pv = args - ctx->olaps[oix].offset; |
839 | pages[i].addr = ctx->buf->phys - | |
840 | ctx->olaps[oix].offset + | |
841 | (pkt_size - rlen); | |
c68cfb71 | 842 | pages[i].addr = pages[i].addr & PAGE_MASK; |
25e8dfb8 | 843 | |
02b45b47 SK |
844 | pg_start = (args & PAGE_MASK) >> PAGE_SHIFT; |
845 | pg_end = ((args + len - 1) & PAGE_MASK) >> PAGE_SHIFT; | |
846 | pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; | |
25e8dfb8 SK |
847 | args = args + mlen; |
848 | rlen -= mlen; | |
c68cfb71 SK |
849 | } |
850 | ||
851 | if (i < inbufs && !ctx->maps[i]) { | |
852 | void *dst = (void *)(uintptr_t)rpra[i].pv; | |
853 | void *src = (void *)(uintptr_t)ctx->args[i].ptr; | |
854 | ||
855 | if (!kernel) { | |
856 | if (copy_from_user(dst, (void __user *)src, | |
857 | len)) { | |
858 | err = -EFAULT; | |
859 | goto bail; | |
860 | } | |
861 | } else { | |
862 | memcpy(dst, src, len); | |
863 | } | |
864 | } | |
865 | } | |
866 | ||
867 | for (i = ctx->nbufs; i < ctx->nscalars; ++i) { | |
868 | rpra[i].pv = (u64) ctx->args[i].ptr; | |
869 | rpra[i].len = ctx->args[i].length; | |
870 | list[i].num = ctx->args[i].length ? 1 : 0; | |
871 | list[i].pgidx = i; | |
872 | pages[i].addr = ctx->maps[i]->phys; | |
873 | pages[i].size = ctx->maps[i]->size; | |
874 | } | |
875 | ||
876 | bail: | |
877 | if (err) | |
878 | dev_err(dev, "Error: get invoke args failed:%d\n", err); | |
879 | ||
880 | return err; | |
881 | } | |
882 | ||
883 | static int fastrpc_put_args(struct fastrpc_invoke_ctx *ctx, | |
884 | u32 kernel) | |
885 | { | |
886 | struct fastrpc_remote_arg *rpra = ctx->rpra; | |
887 | int i, inbufs; | |
888 | ||
889 | inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); | |
890 | ||
891 | for (i = inbufs; i < ctx->nbufs; ++i) { | |
892 | void *src = (void *)(uintptr_t)rpra[i].pv; | |
893 | void *dst = (void *)(uintptr_t)ctx->args[i].ptr; | |
894 | u64 len = rpra[i].len; | |
895 | ||
896 | if (!kernel) { | |
897 | if (copy_to_user((void __user *)dst, src, len)) | |
898 | return -EFAULT; | |
899 | } else { | |
900 | memcpy(dst, src, len); | |
901 | } | |
902 | } | |
903 | ||
904 | return 0; | |
905 | } | |
906 | ||
907 | static int fastrpc_invoke_send(struct fastrpc_session_ctx *sctx, | |
908 | struct fastrpc_invoke_ctx *ctx, | |
909 | u32 kernel, uint32_t handle) | |
910 | { | |
911 | struct fastrpc_channel_ctx *cctx; | |
912 | struct fastrpc_user *fl = ctx->fl; | |
913 | struct fastrpc_msg *msg = &ctx->msg; | |
914 | ||
915 | cctx = fl->cctx; | |
916 | msg->pid = fl->tgid; | |
917 | msg->tid = current->pid; | |
918 | ||
919 | if (kernel) | |
920 | msg->pid = 0; | |
921 | ||
922 | msg->ctx = ctx->ctxid | fl->pd; | |
923 | msg->handle = handle; | |
924 | msg->sc = ctx->sc; | |
925 | msg->addr = ctx->buf ? ctx->buf->phys : 0; | |
926 | msg->size = roundup(ctx->msg_sz, PAGE_SIZE); | |
927 | fastrpc_context_get(ctx); | |
928 | ||
929 | return rpmsg_send(cctx->rpdev->ept, (void *)msg, sizeof(*msg)); | |
930 | } | |
931 | ||
932 | static int fastrpc_internal_invoke(struct fastrpc_user *fl, u32 kernel, | |
933 | u32 handle, u32 sc, | |
934 | struct fastrpc_invoke_args *args) | |
935 | { | |
936 | struct fastrpc_invoke_ctx *ctx = NULL; | |
937 | int err = 0; | |
938 | ||
939 | if (!fl->sctx) | |
940 | return -EINVAL; | |
941 | ||
2e369878 BA |
942 | if (!fl->cctx->rpdev) |
943 | return -EPIPE; | |
944 | ||
c68cfb71 SK |
945 | ctx = fastrpc_context_alloc(fl, kernel, sc, args); |
946 | if (IS_ERR(ctx)) | |
947 | return PTR_ERR(ctx); | |
948 | ||
949 | if (ctx->nscalars) { | |
950 | err = fastrpc_get_args(kernel, ctx); | |
951 | if (err) | |
952 | goto bail; | |
953 | } | |
415a0729 SK |
954 | |
955 | /* make sure that all CPU memory writes are seen by DSP */ | |
956 | dma_wmb(); | |
c68cfb71 SK |
957 | /* Send invoke buffer to remote dsp */ |
958 | err = fastrpc_invoke_send(fl->sctx, ctx, kernel, handle); | |
959 | if (err) | |
960 | goto bail; | |
961 | ||
962 | /* Wait for remote dsp to respond or time out */ | |
963 | err = wait_for_completion_interruptible(&ctx->work); | |
964 | if (err) | |
965 | goto bail; | |
966 | ||
967 | /* Check the response from remote dsp */ | |
968 | err = ctx->retval; | |
969 | if (err) | |
970 | goto bail; | |
971 | ||
972 | if (ctx->nscalars) { | |
415a0729 SK |
973 | /* make sure that all memory writes by DSP are seen by CPU */ |
974 | dma_rmb(); | |
c68cfb71 SK |
975 | /* populate all the output buffers with results */ |
976 | err = fastrpc_put_args(ctx, kernel); | |
977 | if (err) | |
978 | goto bail; | |
979 | } | |
980 | ||
981 | bail: | |
982 | /* We are done with this compute context, remove it from pending list */ | |
983 | spin_lock(&fl->lock); | |
984 | list_del(&ctx->node); | |
985 | spin_unlock(&fl->lock); | |
986 | fastrpc_context_put(ctx); | |
987 | ||
988 | if (err) | |
989 | dev_dbg(fl->sctx->dev, "Error: Invoke Failed %d\n", err); | |
990 | ||
991 | return err; | |
992 | } | |
993 | ||
d73f71c7 SK |
994 | static int fastrpc_init_create_process(struct fastrpc_user *fl, |
995 | char __user *argp) | |
996 | { | |
997 | struct fastrpc_init_create init; | |
998 | struct fastrpc_invoke_args *args; | |
999 | struct fastrpc_phy_page pages[1]; | |
1000 | struct fastrpc_map *map = NULL; | |
1001 | struct fastrpc_buf *imem = NULL; | |
1002 | int memlen; | |
1003 | int err; | |
1004 | struct { | |
1005 | int pgid; | |
1006 | u32 namelen; | |
1007 | u32 filelen; | |
1008 | u32 pageslen; | |
1009 | u32 attrs; | |
1010 | u32 siglen; | |
1011 | } inbuf; | |
1012 | u32 sc; | |
1013 | ||
1014 | args = kcalloc(FASTRPC_CREATE_PROCESS_NARGS, sizeof(*args), GFP_KERNEL); | |
1015 | if (!args) | |
1016 | return -ENOMEM; | |
1017 | ||
1018 | if (copy_from_user(&init, argp, sizeof(init))) { | |
1019 | err = -EFAULT; | |
b49f6d83 | 1020 | goto err; |
d73f71c7 SK |
1021 | } |
1022 | ||
1023 | if (init.filelen > INIT_FILELEN_MAX) { | |
1024 | err = -EINVAL; | |
b49f6d83 | 1025 | goto err; |
d73f71c7 SK |
1026 | } |
1027 | ||
1028 | inbuf.pgid = fl->tgid; | |
1029 | inbuf.namelen = strlen(current->comm) + 1; | |
1030 | inbuf.filelen = init.filelen; | |
1031 | inbuf.pageslen = 1; | |
1032 | inbuf.attrs = init.attrs; | |
1033 | inbuf.siglen = init.siglen; | |
1034 | fl->pd = 1; | |
1035 | ||
1036 | if (init.filelen && init.filefd) { | |
1037 | err = fastrpc_map_create(fl, init.filefd, init.filelen, &map); | |
1038 | if (err) | |
b49f6d83 | 1039 | goto err; |
d73f71c7 SK |
1040 | } |
1041 | ||
1042 | memlen = ALIGN(max(INIT_FILELEN_MAX, (int)init.filelen * 4), | |
1043 | 1024 * 1024); | |
1044 | err = fastrpc_buf_alloc(fl, fl->sctx->dev, memlen, | |
1045 | &imem); | |
b49f6d83 TE |
1046 | if (err) |
1047 | goto err_alloc; | |
d73f71c7 SK |
1048 | |
1049 | fl->init_mem = imem; | |
1050 | args[0].ptr = (u64)(uintptr_t)&inbuf; | |
1051 | args[0].length = sizeof(inbuf); | |
1052 | args[0].fd = -1; | |
1053 | ||
1054 | args[1].ptr = (u64)(uintptr_t)current->comm; | |
1055 | args[1].length = inbuf.namelen; | |
1056 | args[1].fd = -1; | |
1057 | ||
1058 | args[2].ptr = (u64) init.file; | |
1059 | args[2].length = inbuf.filelen; | |
1060 | args[2].fd = init.filefd; | |
1061 | ||
1062 | pages[0].addr = imem->phys; | |
1063 | pages[0].size = imem->size; | |
1064 | ||
1065 | args[3].ptr = (u64)(uintptr_t) pages; | |
1066 | args[3].length = 1 * sizeof(*pages); | |
1067 | args[3].fd = -1; | |
1068 | ||
1069 | args[4].ptr = (u64)(uintptr_t)&inbuf.attrs; | |
1070 | args[4].length = sizeof(inbuf.attrs); | |
1071 | args[4].fd = -1; | |
1072 | ||
1073 | args[5].ptr = (u64)(uintptr_t) &inbuf.siglen; | |
1074 | args[5].length = sizeof(inbuf.siglen); | |
1075 | args[5].fd = -1; | |
1076 | ||
1077 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE, 4, 0); | |
1078 | if (init.attrs) | |
1079 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE_ATTR, 6, 0); | |
1080 | ||
1081 | err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, | |
1082 | sc, args); | |
b49f6d83 TE |
1083 | if (err) |
1084 | goto err_invoke; | |
1085 | ||
1086 | kfree(args); | |
d73f71c7 | 1087 | |
b49f6d83 TE |
1088 | return 0; |
1089 | ||
1090 | err_invoke: | |
1091 | fl->init_mem = NULL; | |
1092 | fastrpc_buf_free(imem); | |
1093 | err_alloc: | |
1094 | if (map) { | |
1095 | spin_lock(&fl->lock); | |
1096 | list_del(&map->node); | |
1097 | spin_unlock(&fl->lock); | |
d73f71c7 | 1098 | fastrpc_map_put(map); |
d73f71c7 | 1099 | } |
b49f6d83 | 1100 | err: |
d73f71c7 SK |
1101 | kfree(args); |
1102 | ||
1103 | return err; | |
1104 | } | |
1105 | ||
f6f9279f SK |
1106 | static struct fastrpc_session_ctx *fastrpc_session_alloc( |
1107 | struct fastrpc_channel_ctx *cctx) | |
1108 | { | |
1109 | struct fastrpc_session_ctx *session = NULL; | |
977e6c8d | 1110 | unsigned long flags; |
f6f9279f SK |
1111 | int i; |
1112 | ||
977e6c8d | 1113 | spin_lock_irqsave(&cctx->lock, flags); |
f6f9279f SK |
1114 | for (i = 0; i < cctx->sesscount; i++) { |
1115 | if (!cctx->session[i].used && cctx->session[i].valid) { | |
1116 | cctx->session[i].used = true; | |
1117 | session = &cctx->session[i]; | |
1118 | break; | |
1119 | } | |
1120 | } | |
977e6c8d | 1121 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f SK |
1122 | |
1123 | return session; | |
1124 | } | |
1125 | ||
1126 | static void fastrpc_session_free(struct fastrpc_channel_ctx *cctx, | |
1127 | struct fastrpc_session_ctx *session) | |
1128 | { | |
977e6c8d SK |
1129 | unsigned long flags; |
1130 | ||
1131 | spin_lock_irqsave(&cctx->lock, flags); | |
f6f9279f | 1132 | session->used = false; |
977e6c8d | 1133 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f SK |
1134 | } |
1135 | ||
d73f71c7 SK |
1136 | static int fastrpc_release_current_dsp_process(struct fastrpc_user *fl) |
1137 | { | |
1138 | struct fastrpc_invoke_args args[1]; | |
1139 | int tgid = 0; | |
1140 | u32 sc; | |
1141 | ||
1142 | tgid = fl->tgid; | |
1143 | args[0].ptr = (u64)(uintptr_t) &tgid; | |
1144 | args[0].length = sizeof(tgid); | |
1145 | args[0].fd = -1; | |
1146 | args[0].reserved = 0; | |
1147 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_RELEASE, 1, 0); | |
1148 | ||
1149 | return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, | |
1150 | sc, &args[0]); | |
1151 | } | |
1152 | ||
f6f9279f SK |
1153 | static int fastrpc_device_release(struct inode *inode, struct file *file) |
1154 | { | |
1155 | struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; | |
1156 | struct fastrpc_channel_ctx *cctx = fl->cctx; | |
c68cfb71 SK |
1157 | struct fastrpc_invoke_ctx *ctx, *n; |
1158 | struct fastrpc_map *map, *m; | |
2419e55e | 1159 | struct fastrpc_buf *buf, *b; |
977e6c8d | 1160 | unsigned long flags; |
f6f9279f | 1161 | |
d73f71c7 SK |
1162 | fastrpc_release_current_dsp_process(fl); |
1163 | ||
977e6c8d | 1164 | spin_lock_irqsave(&cctx->lock, flags); |
f6f9279f | 1165 | list_del(&fl->user); |
977e6c8d | 1166 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f | 1167 | |
c68cfb71 SK |
1168 | if (fl->init_mem) |
1169 | fastrpc_buf_free(fl->init_mem); | |
1170 | ||
1171 | list_for_each_entry_safe(ctx, n, &fl->pending, node) { | |
1172 | list_del(&ctx->node); | |
1173 | fastrpc_context_put(ctx); | |
1174 | } | |
1175 | ||
1176 | list_for_each_entry_safe(map, m, &fl->maps, node) { | |
1177 | list_del(&map->node); | |
1178 | fastrpc_map_put(map); | |
1179 | } | |
1180 | ||
2419e55e JRO |
1181 | list_for_each_entry_safe(buf, b, &fl->mmaps, node) { |
1182 | list_del(&buf->node); | |
1183 | fastrpc_buf_free(buf); | |
1184 | } | |
1185 | ||
f6f9279f | 1186 | fastrpc_session_free(cctx, fl->sctx); |
278d56f9 | 1187 | fastrpc_channel_ctx_put(cctx); |
f6f9279f SK |
1188 | |
1189 | mutex_destroy(&fl->mutex); | |
1190 | kfree(fl); | |
1191 | file->private_data = NULL; | |
1192 | ||
1193 | return 0; | |
1194 | } | |
1195 | ||
1196 | static int fastrpc_device_open(struct inode *inode, struct file *filp) | |
1197 | { | |
1198 | struct fastrpc_channel_ctx *cctx = miscdev_to_cctx(filp->private_data); | |
1199 | struct fastrpc_user *fl = NULL; | |
977e6c8d | 1200 | unsigned long flags; |
f6f9279f SK |
1201 | |
1202 | fl = kzalloc(sizeof(*fl), GFP_KERNEL); | |
1203 | if (!fl) | |
1204 | return -ENOMEM; | |
1205 | ||
278d56f9 BA |
1206 | /* Released in fastrpc_device_release() */ |
1207 | fastrpc_channel_ctx_get(cctx); | |
1208 | ||
f6f9279f SK |
1209 | filp->private_data = fl; |
1210 | spin_lock_init(&fl->lock); | |
1211 | mutex_init(&fl->mutex); | |
1212 | INIT_LIST_HEAD(&fl->pending); | |
1213 | INIT_LIST_HEAD(&fl->maps); | |
2419e55e | 1214 | INIT_LIST_HEAD(&fl->mmaps); |
f6f9279f SK |
1215 | INIT_LIST_HEAD(&fl->user); |
1216 | fl->tgid = current->tgid; | |
1217 | fl->cctx = cctx; | |
7c11df42 TE |
1218 | |
1219 | fl->sctx = fastrpc_session_alloc(cctx); | |
1220 | if (!fl->sctx) { | |
1221 | dev_err(&cctx->rpdev->dev, "No session available\n"); | |
1222 | mutex_destroy(&fl->mutex); | |
1223 | kfree(fl); | |
1224 | ||
1225 | return -EBUSY; | |
1226 | } | |
1227 | ||
977e6c8d | 1228 | spin_lock_irqsave(&cctx->lock, flags); |
f6f9279f | 1229 | list_add_tail(&fl->user, &cctx->users); |
977e6c8d | 1230 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f SK |
1231 | |
1232 | return 0; | |
1233 | } | |
1234 | ||
6cffd795 SK |
1235 | static int fastrpc_dmabuf_alloc(struct fastrpc_user *fl, char __user *argp) |
1236 | { | |
1237 | struct fastrpc_alloc_dma_buf bp; | |
1238 | DEFINE_DMA_BUF_EXPORT_INFO(exp_info); | |
1239 | struct fastrpc_buf *buf = NULL; | |
1240 | int err; | |
1241 | ||
1242 | if (copy_from_user(&bp, argp, sizeof(bp))) | |
1243 | return -EFAULT; | |
1244 | ||
1245 | err = fastrpc_buf_alloc(fl, fl->sctx->dev, bp.size, &buf); | |
1246 | if (err) | |
1247 | return err; | |
1248 | exp_info.ops = &fastrpc_dma_buf_ops; | |
1249 | exp_info.size = bp.size; | |
1250 | exp_info.flags = O_RDWR; | |
1251 | exp_info.priv = buf; | |
1252 | buf->dmabuf = dma_buf_export(&exp_info); | |
1253 | if (IS_ERR(buf->dmabuf)) { | |
1254 | err = PTR_ERR(buf->dmabuf); | |
1255 | fastrpc_buf_free(buf); | |
1256 | return err; | |
1257 | } | |
1258 | ||
1259 | bp.fd = dma_buf_fd(buf->dmabuf, O_ACCMODE); | |
1260 | if (bp.fd < 0) { | |
1261 | dma_buf_put(buf->dmabuf); | |
1262 | return -EINVAL; | |
1263 | } | |
1264 | ||
1265 | if (copy_to_user(argp, &bp, sizeof(bp))) { | |
1266 | dma_buf_put(buf->dmabuf); | |
1267 | return -EFAULT; | |
1268 | } | |
1269 | ||
6cffd795 SK |
1270 | return 0; |
1271 | } | |
1272 | ||
d73f71c7 SK |
1273 | static int fastrpc_init_attach(struct fastrpc_user *fl) |
1274 | { | |
1275 | struct fastrpc_invoke_args args[1]; | |
1276 | int tgid = fl->tgid; | |
1277 | u32 sc; | |
1278 | ||
1279 | args[0].ptr = (u64)(uintptr_t) &tgid; | |
1280 | args[0].length = sizeof(tgid); | |
1281 | args[0].fd = -1; | |
1282 | args[0].reserved = 0; | |
1283 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_ATTACH, 1, 0); | |
1284 | fl->pd = 0; | |
1285 | ||
1286 | return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, | |
1287 | sc, &args[0]); | |
1288 | } | |
1289 | ||
c68cfb71 SK |
1290 | static int fastrpc_invoke(struct fastrpc_user *fl, char __user *argp) |
1291 | { | |
1292 | struct fastrpc_invoke_args *args = NULL; | |
1293 | struct fastrpc_invoke inv; | |
1294 | u32 nscalars; | |
1295 | int err; | |
1296 | ||
1297 | if (copy_from_user(&inv, argp, sizeof(inv))) | |
1298 | return -EFAULT; | |
1299 | ||
1300 | /* nscalars is truncated here to max supported value */ | |
1301 | nscalars = REMOTE_SCALARS_LENGTH(inv.sc); | |
1302 | if (nscalars) { | |
1303 | args = kcalloc(nscalars, sizeof(*args), GFP_KERNEL); | |
1304 | if (!args) | |
1305 | return -ENOMEM; | |
1306 | ||
1307 | if (copy_from_user(args, (void __user *)(uintptr_t)inv.args, | |
1308 | nscalars * sizeof(*args))) { | |
1309 | kfree(args); | |
1310 | return -EFAULT; | |
1311 | } | |
1312 | } | |
1313 | ||
1314 | err = fastrpc_internal_invoke(fl, false, inv.handle, inv.sc, args); | |
1315 | kfree(args); | |
1316 | ||
1317 | return err; | |
1318 | } | |
1319 | ||
2419e55e JRO |
1320 | static int fastrpc_req_munmap_impl(struct fastrpc_user *fl, |
1321 | struct fastrpc_req_munmap *req) | |
1322 | { | |
1323 | struct fastrpc_invoke_args args[1] = { [0] = { 0 } }; | |
1324 | struct fastrpc_buf *buf, *b; | |
1325 | struct fastrpc_munmap_req_msg req_msg; | |
1326 | struct device *dev = fl->sctx->dev; | |
1327 | int err; | |
1328 | u32 sc; | |
1329 | ||
1330 | spin_lock(&fl->lock); | |
1331 | list_for_each_entry_safe(buf, b, &fl->mmaps, node) { | |
1332 | if ((buf->raddr == req->vaddrout) && (buf->size == req->size)) | |
1333 | break; | |
1334 | buf = NULL; | |
1335 | } | |
1336 | spin_unlock(&fl->lock); | |
1337 | ||
1338 | if (!buf) { | |
1339 | dev_err(dev, "mmap not in list\n"); | |
1340 | return -EINVAL; | |
1341 | } | |
1342 | ||
1343 | req_msg.pgid = fl->tgid; | |
1344 | req_msg.size = buf->size; | |
1345 | req_msg.vaddr = buf->raddr; | |
1346 | ||
1347 | args[0].ptr = (u64) (uintptr_t) &req_msg; | |
1348 | args[0].length = sizeof(req_msg); | |
1349 | ||
1350 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MUNMAP, 1, 0); | |
1351 | err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, | |
1352 | &args[0]); | |
1353 | if (!err) { | |
1354 | dev_dbg(dev, "unmmap\tpt 0x%09lx OK\n", buf->raddr); | |
1355 | spin_lock(&fl->lock); | |
1356 | list_del(&buf->node); | |
1357 | spin_unlock(&fl->lock); | |
1358 | fastrpc_buf_free(buf); | |
1359 | } else { | |
1360 | dev_err(dev, "unmmap\tpt 0x%09lx ERROR\n", buf->raddr); | |
1361 | } | |
1362 | ||
1363 | return err; | |
1364 | } | |
1365 | ||
1366 | static int fastrpc_req_munmap(struct fastrpc_user *fl, char __user *argp) | |
1367 | { | |
1368 | struct fastrpc_req_munmap req; | |
1369 | ||
1370 | if (copy_from_user(&req, argp, sizeof(req))) | |
1371 | return -EFAULT; | |
1372 | ||
1373 | return fastrpc_req_munmap_impl(fl, &req); | |
1374 | } | |
1375 | ||
1376 | static int fastrpc_req_mmap(struct fastrpc_user *fl, char __user *argp) | |
1377 | { | |
1378 | struct fastrpc_invoke_args args[3] = { [0 ... 2] = { 0 } }; | |
1379 | struct fastrpc_buf *buf = NULL; | |
1380 | struct fastrpc_mmap_req_msg req_msg; | |
1381 | struct fastrpc_mmap_rsp_msg rsp_msg; | |
1382 | struct fastrpc_req_munmap req_unmap; | |
1383 | struct fastrpc_phy_page pages; | |
1384 | struct fastrpc_req_mmap req; | |
1385 | struct device *dev = fl->sctx->dev; | |
1386 | int err; | |
1387 | u32 sc; | |
1388 | ||
1389 | if (copy_from_user(&req, argp, sizeof(req))) | |
1390 | return -EFAULT; | |
1391 | ||
1392 | if (req.flags != ADSP_MMAP_ADD_PAGES) { | |
1393 | dev_err(dev, "flag not supported 0x%x\n", req.flags); | |
1394 | return -EINVAL; | |
1395 | } | |
1396 | ||
1397 | if (req.vaddrin) { | |
1398 | dev_err(dev, "adding user allocated pages is not supported\n"); | |
1399 | return -EINVAL; | |
1400 | } | |
1401 | ||
1402 | err = fastrpc_buf_alloc(fl, fl->sctx->dev, req.size, &buf); | |
1403 | if (err) { | |
1404 | dev_err(dev, "failed to allocate buffer\n"); | |
1405 | return err; | |
1406 | } | |
1407 | ||
1408 | req_msg.pgid = fl->tgid; | |
1409 | req_msg.flags = req.flags; | |
1410 | req_msg.vaddr = req.vaddrin; | |
1411 | req_msg.num = sizeof(pages); | |
1412 | ||
1413 | args[0].ptr = (u64) (uintptr_t) &req_msg; | |
1414 | args[0].length = sizeof(req_msg); | |
1415 | ||
1416 | pages.addr = buf->phys; | |
1417 | pages.size = buf->size; | |
1418 | ||
1419 | args[1].ptr = (u64) (uintptr_t) &pages; | |
1420 | args[1].length = sizeof(pages); | |
1421 | ||
1422 | args[2].ptr = (u64) (uintptr_t) &rsp_msg; | |
1423 | args[2].length = sizeof(rsp_msg); | |
1424 | ||
1425 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MMAP, 2, 1); | |
1426 | err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, | |
1427 | &args[0]); | |
1428 | if (err) { | |
1429 | dev_err(dev, "mmap error (len 0x%08llx)\n", buf->size); | |
1430 | goto err_invoke; | |
1431 | } | |
1432 | ||
1433 | /* update the buffer to be able to deallocate the memory on the DSP */ | |
1434 | buf->raddr = (uintptr_t) rsp_msg.vaddr; | |
1435 | ||
1436 | /* let the client know the address to use */ | |
1437 | req.vaddrout = rsp_msg.vaddr; | |
1438 | ||
1439 | spin_lock(&fl->lock); | |
1440 | list_add_tail(&buf->node, &fl->mmaps); | |
1441 | spin_unlock(&fl->lock); | |
1442 | ||
1443 | if (copy_to_user((void __user *)argp, &req, sizeof(req))) { | |
1444 | /* unmap the memory and release the buffer */ | |
1445 | req_unmap.vaddrout = buf->raddr; | |
1446 | req_unmap.size = buf->size; | |
1447 | fastrpc_req_munmap_impl(fl, &req_unmap); | |
1448 | return -EFAULT; | |
1449 | } | |
1450 | ||
1451 | dev_dbg(dev, "mmap\t\tpt 0x%09lx OK [len 0x%08llx]\n", | |
1452 | buf->raddr, buf->size); | |
1453 | ||
1454 | return 0; | |
1455 | ||
1456 | err_invoke: | |
1457 | fastrpc_buf_free(buf); | |
1458 | ||
1459 | return err; | |
1460 | } | |
1461 | ||
c68cfb71 SK |
1462 | static long fastrpc_device_ioctl(struct file *file, unsigned int cmd, |
1463 | unsigned long arg) | |
1464 | { | |
1465 | struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; | |
1466 | char __user *argp = (char __user *)arg; | |
1467 | int err; | |
1468 | ||
1469 | switch (cmd) { | |
1470 | case FASTRPC_IOCTL_INVOKE: | |
1471 | err = fastrpc_invoke(fl, argp); | |
1472 | break; | |
d73f71c7 SK |
1473 | case FASTRPC_IOCTL_INIT_ATTACH: |
1474 | err = fastrpc_init_attach(fl); | |
1475 | break; | |
1476 | case FASTRPC_IOCTL_INIT_CREATE: | |
1477 | err = fastrpc_init_create_process(fl, argp); | |
1478 | break; | |
6cffd795 SK |
1479 | case FASTRPC_IOCTL_ALLOC_DMA_BUFF: |
1480 | err = fastrpc_dmabuf_alloc(fl, argp); | |
1481 | break; | |
2419e55e JRO |
1482 | case FASTRPC_IOCTL_MMAP: |
1483 | err = fastrpc_req_mmap(fl, argp); | |
1484 | break; | |
1485 | case FASTRPC_IOCTL_MUNMAP: | |
1486 | err = fastrpc_req_munmap(fl, argp); | |
1487 | break; | |
c68cfb71 SK |
1488 | default: |
1489 | err = -ENOTTY; | |
1490 | break; | |
1491 | } | |
1492 | ||
1493 | return err; | |
1494 | } | |
1495 | ||
f6f9279f SK |
1496 | static const struct file_operations fastrpc_fops = { |
1497 | .open = fastrpc_device_open, | |
1498 | .release = fastrpc_device_release, | |
c68cfb71 SK |
1499 | .unlocked_ioctl = fastrpc_device_ioctl, |
1500 | .compat_ioctl = fastrpc_device_ioctl, | |
f6f9279f SK |
1501 | }; |
1502 | ||
1503 | static int fastrpc_cb_probe(struct platform_device *pdev) | |
1504 | { | |
1505 | struct fastrpc_channel_ctx *cctx; | |
1506 | struct fastrpc_session_ctx *sess; | |
1507 | struct device *dev = &pdev->dev; | |
1508 | int i, sessions = 0; | |
977e6c8d | 1509 | unsigned long flags; |
01b76c32 | 1510 | int rc; |
f6f9279f SK |
1511 | |
1512 | cctx = dev_get_drvdata(dev->parent); | |
1513 | if (!cctx) | |
1514 | return -EINVAL; | |
1515 | ||
1516 | of_property_read_u32(dev->of_node, "qcom,nsessions", &sessions); | |
1517 | ||
977e6c8d | 1518 | spin_lock_irqsave(&cctx->lock, flags); |
f6f9279f SK |
1519 | sess = &cctx->session[cctx->sesscount]; |
1520 | sess->used = false; | |
1521 | sess->valid = true; | |
1522 | sess->dev = dev; | |
1523 | dev_set_drvdata(dev, sess); | |
1524 | ||
1525 | if (of_property_read_u32(dev->of_node, "reg", &sess->sid)) | |
1526 | dev_info(dev, "FastRPC Session ID not specified in DT\n"); | |
1527 | ||
1528 | if (sessions > 0) { | |
1529 | struct fastrpc_session_ctx *dup_sess; | |
1530 | ||
1531 | for (i = 1; i < sessions; i++) { | |
1532 | if (cctx->sesscount++ >= FASTRPC_MAX_SESSIONS) | |
1533 | break; | |
1534 | dup_sess = &cctx->session[cctx->sesscount]; | |
1535 | memcpy(dup_sess, sess, sizeof(*dup_sess)); | |
1536 | } | |
1537 | } | |
1538 | cctx->sesscount++; | |
977e6c8d | 1539 | spin_unlock_irqrestore(&cctx->lock, flags); |
01b76c32 BY |
1540 | rc = dma_set_mask(dev, DMA_BIT_MASK(32)); |
1541 | if (rc) { | |
1542 | dev_err(dev, "32-bit DMA enable failed\n"); | |
1543 | return rc; | |
1544 | } | |
f6f9279f SK |
1545 | |
1546 | return 0; | |
1547 | } | |
1548 | ||
1549 | static int fastrpc_cb_remove(struct platform_device *pdev) | |
1550 | { | |
1551 | struct fastrpc_channel_ctx *cctx = dev_get_drvdata(pdev->dev.parent); | |
1552 | struct fastrpc_session_ctx *sess = dev_get_drvdata(&pdev->dev); | |
977e6c8d | 1553 | unsigned long flags; |
f6f9279f SK |
1554 | int i; |
1555 | ||
977e6c8d | 1556 | spin_lock_irqsave(&cctx->lock, flags); |
f6f9279f SK |
1557 | for (i = 1; i < FASTRPC_MAX_SESSIONS; i++) { |
1558 | if (cctx->session[i].sid == sess->sid) { | |
1559 | cctx->session[i].valid = false; | |
1560 | cctx->sesscount--; | |
1561 | } | |
1562 | } | |
977e6c8d | 1563 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f SK |
1564 | |
1565 | return 0; | |
1566 | } | |
1567 | ||
1568 | static const struct of_device_id fastrpc_match_table[] = { | |
1569 | { .compatible = "qcom,fastrpc-compute-cb", }, | |
1570 | {} | |
1571 | }; | |
1572 | ||
1573 | static struct platform_driver fastrpc_cb_driver = { | |
1574 | .probe = fastrpc_cb_probe, | |
1575 | .remove = fastrpc_cb_remove, | |
1576 | .driver = { | |
1577 | .name = "qcom,fastrpc-cb", | |
1578 | .of_match_table = fastrpc_match_table, | |
1579 | .suppress_bind_attrs = true, | |
1580 | }, | |
1581 | }; | |
1582 | ||
1583 | static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev) | |
1584 | { | |
1585 | struct device *rdev = &rpdev->dev; | |
1586 | struct fastrpc_channel_ctx *data; | |
1587 | int i, err, domain_id = -1; | |
1588 | const char *domain; | |
1589 | ||
f6f9279f SK |
1590 | err = of_property_read_string(rdev->of_node, "label", &domain); |
1591 | if (err) { | |
1592 | dev_info(rdev, "FastRPC Domain not specified in DT\n"); | |
1593 | return err; | |
1594 | } | |
1595 | ||
1596 | for (i = 0; i <= CDSP_DOMAIN_ID; i++) { | |
1597 | if (!strcmp(domains[i], domain)) { | |
1598 | domain_id = i; | |
1599 | break; | |
1600 | } | |
1601 | } | |
1602 | ||
1603 | if (domain_id < 0) { | |
1604 | dev_info(rdev, "FastRPC Invalid Domain ID %d\n", domain_id); | |
1605 | return -EINVAL; | |
1606 | } | |
1607 | ||
278d56f9 BA |
1608 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
1609 | if (!data) | |
1610 | return -ENOMEM; | |
1611 | ||
f6f9279f | 1612 | data->miscdev.minor = MISC_DYNAMIC_MINOR; |
2d10d2d1 SK |
1613 | data->miscdev.name = devm_kasprintf(rdev, GFP_KERNEL, "fastrpc-%s", |
1614 | domains[domain_id]); | |
f6f9279f SK |
1615 | data->miscdev.fops = &fastrpc_fops; |
1616 | err = misc_register(&data->miscdev); | |
1617 | if (err) | |
1618 | return err; | |
1619 | ||
278d56f9 BA |
1620 | kref_init(&data->refcount); |
1621 | ||
f6f9279f SK |
1622 | dev_set_drvdata(&rpdev->dev, data); |
1623 | dma_set_mask_and_coherent(rdev, DMA_BIT_MASK(32)); | |
1624 | INIT_LIST_HEAD(&data->users); | |
1625 | spin_lock_init(&data->lock); | |
1626 | idr_init(&data->ctx_idr); | |
1627 | data->domain_id = domain_id; | |
1628 | data->rpdev = rpdev; | |
1629 | ||
1630 | return of_platform_populate(rdev->of_node, NULL, NULL, rdev); | |
1631 | } | |
1632 | ||
c68cfb71 SK |
1633 | static void fastrpc_notify_users(struct fastrpc_user *user) |
1634 | { | |
1635 | struct fastrpc_invoke_ctx *ctx; | |
1636 | ||
1637 | spin_lock(&user->lock); | |
1638 | list_for_each_entry(ctx, &user->pending, node) | |
1639 | complete(&ctx->work); | |
1640 | spin_unlock(&user->lock); | |
1641 | } | |
1642 | ||
f6f9279f SK |
1643 | static void fastrpc_rpmsg_remove(struct rpmsg_device *rpdev) |
1644 | { | |
1645 | struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); | |
c68cfb71 | 1646 | struct fastrpc_user *user; |
977e6c8d | 1647 | unsigned long flags; |
c68cfb71 | 1648 | |
977e6c8d | 1649 | spin_lock_irqsave(&cctx->lock, flags); |
c68cfb71 SK |
1650 | list_for_each_entry(user, &cctx->users, user) |
1651 | fastrpc_notify_users(user); | |
977e6c8d | 1652 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f SK |
1653 | |
1654 | misc_deregister(&cctx->miscdev); | |
1655 | of_platform_depopulate(&rpdev->dev); | |
278d56f9 | 1656 | |
2e369878 | 1657 | cctx->rpdev = NULL; |
278d56f9 | 1658 | fastrpc_channel_ctx_put(cctx); |
f6f9279f SK |
1659 | } |
1660 | ||
1661 | static int fastrpc_rpmsg_callback(struct rpmsg_device *rpdev, void *data, | |
1662 | int len, void *priv, u32 addr) | |
1663 | { | |
c68cfb71 SK |
1664 | struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); |
1665 | struct fastrpc_invoke_rsp *rsp = data; | |
1666 | struct fastrpc_invoke_ctx *ctx; | |
1667 | unsigned long flags; | |
1668 | unsigned long ctxid; | |
1669 | ||
1670 | if (len < sizeof(*rsp)) | |
1671 | return -EINVAL; | |
1672 | ||
1673 | ctxid = ((rsp->ctx & FASTRPC_CTXID_MASK) >> 4); | |
1674 | ||
1675 | spin_lock_irqsave(&cctx->lock, flags); | |
1676 | ctx = idr_find(&cctx->ctx_idr, ctxid); | |
1677 | spin_unlock_irqrestore(&cctx->lock, flags); | |
1678 | ||
1679 | if (!ctx) { | |
1680 | dev_err(&rpdev->dev, "No context ID matches response\n"); | |
1681 | return -ENOENT; | |
1682 | } | |
1683 | ||
1684 | ctx->retval = rsp->retval; | |
1685 | complete(&ctx->work); | |
8e7389c7 TE |
1686 | |
1687 | /* | |
1688 | * The DMA buffer associated with the context cannot be freed in | |
1689 | * interrupt context so schedule it through a worker thread to | |
1690 | * avoid a kernel BUG. | |
1691 | */ | |
1692 | schedule_work(&ctx->put_work); | |
c68cfb71 | 1693 | |
f6f9279f SK |
1694 | return 0; |
1695 | } | |
1696 | ||
1697 | static const struct of_device_id fastrpc_rpmsg_of_match[] = { | |
1698 | { .compatible = "qcom,fastrpc" }, | |
1699 | { }, | |
1700 | }; | |
1701 | MODULE_DEVICE_TABLE(of, fastrpc_rpmsg_of_match); | |
1702 | ||
1703 | static struct rpmsg_driver fastrpc_driver = { | |
1704 | .probe = fastrpc_rpmsg_probe, | |
1705 | .remove = fastrpc_rpmsg_remove, | |
1706 | .callback = fastrpc_rpmsg_callback, | |
1707 | .drv = { | |
1708 | .name = "qcom,fastrpc", | |
1709 | .of_match_table = fastrpc_rpmsg_of_match, | |
1710 | }, | |
1711 | }; | |
1712 | ||
1713 | static int fastrpc_init(void) | |
1714 | { | |
1715 | int ret; | |
1716 | ||
1717 | ret = platform_driver_register(&fastrpc_cb_driver); | |
1718 | if (ret < 0) { | |
1719 | pr_err("fastrpc: failed to register cb driver\n"); | |
1720 | return ret; | |
1721 | } | |
1722 | ||
1723 | ret = register_rpmsg_driver(&fastrpc_driver); | |
1724 | if (ret < 0) { | |
1725 | pr_err("fastrpc: failed to register rpmsg driver\n"); | |
1726 | platform_driver_unregister(&fastrpc_cb_driver); | |
1727 | return ret; | |
1728 | } | |
1729 | ||
1730 | return 0; | |
1731 | } | |
1732 | module_init(fastrpc_init); | |
1733 | ||
1734 | static void fastrpc_exit(void) | |
1735 | { | |
1736 | platform_driver_unregister(&fastrpc_cb_driver); | |
1737 | unregister_rpmsg_driver(&fastrpc_driver); | |
1738 | } | |
1739 | module_exit(fastrpc_exit); | |
1740 | ||
1741 | MODULE_LICENSE("GPL v2"); |