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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 | ||
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"); | |
fc739a05 | 556 | kfree(a); |
6cffd795 SK |
557 | return -EINVAL; |
558 | } | |
559 | ||
560 | a->dev = attachment->dev; | |
561 | INIT_LIST_HEAD(&a->node); | |
562 | attachment->priv = a; | |
563 | ||
564 | mutex_lock(&buffer->lock); | |
565 | list_add(&a->node, &buffer->attachments); | |
566 | mutex_unlock(&buffer->lock); | |
567 | ||
568 | return 0; | |
569 | } | |
570 | ||
571 | static void fastrpc_dma_buf_detatch(struct dma_buf *dmabuf, | |
572 | struct dma_buf_attachment *attachment) | |
573 | { | |
574 | struct fastrpc_dma_buf_attachment *a = attachment->priv; | |
575 | struct fastrpc_buf *buffer = dmabuf->priv; | |
576 | ||
577 | mutex_lock(&buffer->lock); | |
578 | list_del(&a->node); | |
579 | mutex_unlock(&buffer->lock); | |
cf61860e | 580 | sg_free_table(&a->sgt); |
6cffd795 SK |
581 | kfree(a); |
582 | } | |
583 | ||
584 | static void *fastrpc_kmap(struct dma_buf *dmabuf, unsigned long pgnum) | |
585 | { | |
586 | struct fastrpc_buf *buf = dmabuf->priv; | |
587 | ||
588 | return buf->virt ? buf->virt + pgnum * PAGE_SIZE : NULL; | |
589 | } | |
590 | ||
591 | static void *fastrpc_vmap(struct dma_buf *dmabuf) | |
592 | { | |
593 | struct fastrpc_buf *buf = dmabuf->priv; | |
594 | ||
595 | return buf->virt; | |
596 | } | |
597 | ||
598 | static int fastrpc_mmap(struct dma_buf *dmabuf, | |
599 | struct vm_area_struct *vma) | |
600 | { | |
601 | struct fastrpc_buf *buf = dmabuf->priv; | |
602 | size_t size = vma->vm_end - vma->vm_start; | |
603 | ||
604 | return dma_mmap_coherent(buf->dev, vma, buf->virt, | |
605 | FASTRPC_PHYS(buf->phys), size); | |
606 | } | |
607 | ||
608 | static const struct dma_buf_ops fastrpc_dma_buf_ops = { | |
609 | .attach = fastrpc_dma_buf_attach, | |
610 | .detach = fastrpc_dma_buf_detatch, | |
611 | .map_dma_buf = fastrpc_map_dma_buf, | |
612 | .unmap_dma_buf = fastrpc_unmap_dma_buf, | |
613 | .mmap = fastrpc_mmap, | |
614 | .map = fastrpc_kmap, | |
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; | |
722 | int i; | |
723 | ||
724 | size = ALIGN(metalen, FASTRPC_ALIGN); | |
725 | for (i = 0; i < ctx->nscalars; i++) { | |
726 | if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1) { | |
25e8dfb8 SK |
727 | |
728 | if (ctx->olaps[i].offset == 0) | |
729 | size = ALIGN(size, FASTRPC_ALIGN); | |
730 | ||
731 | size += (ctx->olaps[i].mend - ctx->olaps[i].mstart); | |
c68cfb71 SK |
732 | } |
733 | } | |
734 | ||
735 | return size; | |
736 | } | |
737 | ||
738 | static int fastrpc_create_maps(struct fastrpc_invoke_ctx *ctx) | |
739 | { | |
740 | struct device *dev = ctx->fl->sctx->dev; | |
741 | int i, err; | |
742 | ||
743 | for (i = 0; i < ctx->nscalars; ++i) { | |
744 | /* Make sure reserved field is set to 0 */ | |
745 | if (ctx->args[i].reserved) | |
746 | return -EINVAL; | |
747 | ||
748 | if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1 || | |
749 | ctx->args[i].length == 0) | |
750 | continue; | |
751 | ||
752 | err = fastrpc_map_create(ctx->fl, ctx->args[i].fd, | |
753 | ctx->args[i].length, &ctx->maps[i]); | |
754 | if (err) { | |
755 | dev_err(dev, "Error Creating map %d\n", err); | |
756 | return -EINVAL; | |
757 | } | |
758 | ||
759 | } | |
760 | return 0; | |
761 | } | |
762 | ||
763 | static int fastrpc_get_args(u32 kernel, struct fastrpc_invoke_ctx *ctx) | |
764 | { | |
765 | struct device *dev = ctx->fl->sctx->dev; | |
766 | struct fastrpc_remote_arg *rpra; | |
767 | struct fastrpc_invoke_buf *list; | |
768 | struct fastrpc_phy_page *pages; | |
25e8dfb8 SK |
769 | int inbufs, i, oix, err = 0; |
770 | u64 len, rlen, pkt_size; | |
02b45b47 | 771 | u64 pg_start, pg_end; |
c68cfb71 SK |
772 | uintptr_t args; |
773 | int metalen; | |
774 | ||
c68cfb71 SK |
775 | inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); |
776 | metalen = fastrpc_get_meta_size(ctx); | |
777 | pkt_size = fastrpc_get_payload_size(ctx, metalen); | |
778 | ||
779 | err = fastrpc_create_maps(ctx); | |
780 | if (err) | |
781 | return err; | |
782 | ||
783 | ctx->msg_sz = pkt_size; | |
784 | ||
785 | err = fastrpc_buf_alloc(ctx->fl, dev, pkt_size, &ctx->buf); | |
786 | if (err) | |
787 | return err; | |
788 | ||
789 | rpra = ctx->buf->virt; | |
790 | list = ctx->buf->virt + ctx->nscalars * sizeof(*rpra); | |
791 | pages = ctx->buf->virt + ctx->nscalars * (sizeof(*list) + | |
792 | sizeof(*rpra)); | |
793 | args = (uintptr_t)ctx->buf->virt + metalen; | |
794 | rlen = pkt_size - metalen; | |
795 | ctx->rpra = rpra; | |
796 | ||
25e8dfb8 SK |
797 | for (oix = 0; oix < ctx->nbufs; ++oix) { |
798 | int mlen; | |
799 | ||
800 | i = ctx->olaps[oix].raix; | |
801 | len = ctx->args[i].length; | |
c68cfb71 SK |
802 | |
803 | rpra[i].pv = 0; | |
804 | rpra[i].len = len; | |
805 | list[i].num = len ? 1 : 0; | |
806 | list[i].pgidx = i; | |
807 | ||
808 | if (!len) | |
809 | continue; | |
810 | ||
c68cfb71 | 811 | if (ctx->maps[i]) { |
80f3afd7 SK |
812 | struct vm_area_struct *vma = NULL; |
813 | ||
c68cfb71 SK |
814 | rpra[i].pv = (u64) ctx->args[i].ptr; |
815 | pages[i].addr = ctx->maps[i]->phys; | |
80f3afd7 SK |
816 | |
817 | vma = find_vma(current->mm, ctx->args[i].ptr); | |
818 | if (vma) | |
819 | pages[i].addr += ctx->args[i].ptr - | |
820 | vma->vm_start; | |
821 | ||
02b45b47 SK |
822 | pg_start = (ctx->args[i].ptr & PAGE_MASK) >> PAGE_SHIFT; |
823 | pg_end = ((ctx->args[i].ptr + len - 1) & PAGE_MASK) >> | |
824 | PAGE_SHIFT; | |
825 | pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; | |
826 | ||
c68cfb71 | 827 | } else { |
25e8dfb8 SK |
828 | |
829 | if (ctx->olaps[oix].offset == 0) { | |
830 | rlen -= ALIGN(args, FASTRPC_ALIGN) - args; | |
831 | args = ALIGN(args, FASTRPC_ALIGN); | |
832 | } | |
833 | ||
834 | mlen = ctx->olaps[oix].mend - ctx->olaps[oix].mstart; | |
835 | ||
836 | if (rlen < mlen) | |
c68cfb71 SK |
837 | goto bail; |
838 | ||
25e8dfb8 SK |
839 | rpra[i].pv = args - ctx->olaps[oix].offset; |
840 | pages[i].addr = ctx->buf->phys - | |
841 | ctx->olaps[oix].offset + | |
842 | (pkt_size - rlen); | |
c68cfb71 | 843 | pages[i].addr = pages[i].addr & PAGE_MASK; |
25e8dfb8 | 844 | |
02b45b47 SK |
845 | pg_start = (args & PAGE_MASK) >> PAGE_SHIFT; |
846 | pg_end = ((args + len - 1) & PAGE_MASK) >> PAGE_SHIFT; | |
847 | pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; | |
25e8dfb8 SK |
848 | args = args + mlen; |
849 | rlen -= mlen; | |
c68cfb71 SK |
850 | } |
851 | ||
852 | if (i < inbufs && !ctx->maps[i]) { | |
853 | void *dst = (void *)(uintptr_t)rpra[i].pv; | |
854 | void *src = (void *)(uintptr_t)ctx->args[i].ptr; | |
855 | ||
856 | if (!kernel) { | |
857 | if (copy_from_user(dst, (void __user *)src, | |
858 | len)) { | |
859 | err = -EFAULT; | |
860 | goto bail; | |
861 | } | |
862 | } else { | |
863 | memcpy(dst, src, len); | |
864 | } | |
865 | } | |
866 | } | |
867 | ||
868 | for (i = ctx->nbufs; i < ctx->nscalars; ++i) { | |
869 | rpra[i].pv = (u64) ctx->args[i].ptr; | |
870 | rpra[i].len = ctx->args[i].length; | |
871 | list[i].num = ctx->args[i].length ? 1 : 0; | |
872 | list[i].pgidx = i; | |
873 | pages[i].addr = ctx->maps[i]->phys; | |
874 | pages[i].size = ctx->maps[i]->size; | |
875 | } | |
876 | ||
877 | bail: | |
878 | if (err) | |
879 | dev_err(dev, "Error: get invoke args failed:%d\n", err); | |
880 | ||
881 | return err; | |
882 | } | |
883 | ||
884 | static int fastrpc_put_args(struct fastrpc_invoke_ctx *ctx, | |
885 | u32 kernel) | |
886 | { | |
887 | struct fastrpc_remote_arg *rpra = ctx->rpra; | |
888 | int i, inbufs; | |
889 | ||
890 | inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); | |
891 | ||
892 | for (i = inbufs; i < ctx->nbufs; ++i) { | |
893 | void *src = (void *)(uintptr_t)rpra[i].pv; | |
894 | void *dst = (void *)(uintptr_t)ctx->args[i].ptr; | |
895 | u64 len = rpra[i].len; | |
896 | ||
897 | if (!kernel) { | |
898 | if (copy_to_user((void __user *)dst, src, len)) | |
899 | return -EFAULT; | |
900 | } else { | |
901 | memcpy(dst, src, len); | |
902 | } | |
903 | } | |
904 | ||
905 | return 0; | |
906 | } | |
907 | ||
908 | static int fastrpc_invoke_send(struct fastrpc_session_ctx *sctx, | |
909 | struct fastrpc_invoke_ctx *ctx, | |
910 | u32 kernel, uint32_t handle) | |
911 | { | |
912 | struct fastrpc_channel_ctx *cctx; | |
913 | struct fastrpc_user *fl = ctx->fl; | |
914 | struct fastrpc_msg *msg = &ctx->msg; | |
915 | ||
916 | cctx = fl->cctx; | |
917 | msg->pid = fl->tgid; | |
918 | msg->tid = current->pid; | |
919 | ||
920 | if (kernel) | |
921 | msg->pid = 0; | |
922 | ||
923 | msg->ctx = ctx->ctxid | fl->pd; | |
924 | msg->handle = handle; | |
925 | msg->sc = ctx->sc; | |
926 | msg->addr = ctx->buf ? ctx->buf->phys : 0; | |
927 | msg->size = roundup(ctx->msg_sz, PAGE_SIZE); | |
928 | fastrpc_context_get(ctx); | |
929 | ||
930 | return rpmsg_send(cctx->rpdev->ept, (void *)msg, sizeof(*msg)); | |
931 | } | |
932 | ||
933 | static int fastrpc_internal_invoke(struct fastrpc_user *fl, u32 kernel, | |
934 | u32 handle, u32 sc, | |
935 | struct fastrpc_invoke_args *args) | |
936 | { | |
937 | struct fastrpc_invoke_ctx *ctx = NULL; | |
938 | int err = 0; | |
939 | ||
940 | if (!fl->sctx) | |
941 | return -EINVAL; | |
942 | ||
2e369878 BA |
943 | if (!fl->cctx->rpdev) |
944 | return -EPIPE; | |
945 | ||
c68cfb71 SK |
946 | ctx = fastrpc_context_alloc(fl, kernel, sc, args); |
947 | if (IS_ERR(ctx)) | |
948 | return PTR_ERR(ctx); | |
949 | ||
950 | if (ctx->nscalars) { | |
951 | err = fastrpc_get_args(kernel, ctx); | |
952 | if (err) | |
953 | goto bail; | |
954 | } | |
415a0729 SK |
955 | |
956 | /* make sure that all CPU memory writes are seen by DSP */ | |
957 | dma_wmb(); | |
c68cfb71 SK |
958 | /* Send invoke buffer to remote dsp */ |
959 | err = fastrpc_invoke_send(fl->sctx, ctx, kernel, handle); | |
960 | if (err) | |
961 | goto bail; | |
962 | ||
55bcda35 JRO |
963 | if (kernel) { |
964 | if (!wait_for_completion_timeout(&ctx->work, 10 * HZ)) | |
965 | err = -ETIMEDOUT; | |
966 | } else { | |
967 | err = wait_for_completion_interruptible(&ctx->work); | |
968 | } | |
969 | ||
c68cfb71 SK |
970 | if (err) |
971 | goto bail; | |
972 | ||
973 | /* Check the response from remote dsp */ | |
974 | err = ctx->retval; | |
975 | if (err) | |
976 | goto bail; | |
977 | ||
978 | if (ctx->nscalars) { | |
415a0729 SK |
979 | /* make sure that all memory writes by DSP are seen by CPU */ |
980 | dma_rmb(); | |
c68cfb71 SK |
981 | /* populate all the output buffers with results */ |
982 | err = fastrpc_put_args(ctx, kernel); | |
983 | if (err) | |
984 | goto bail; | |
985 | } | |
986 | ||
987 | bail: | |
387f6255 JRO |
988 | if (err != -ERESTARTSYS && err != -ETIMEDOUT) { |
989 | /* We are done with this compute context */ | |
990 | spin_lock(&fl->lock); | |
991 | list_del(&ctx->node); | |
992 | spin_unlock(&fl->lock); | |
993 | fastrpc_context_put(ctx); | |
994 | } | |
c68cfb71 SK |
995 | if (err) |
996 | dev_dbg(fl->sctx->dev, "Error: Invoke Failed %d\n", err); | |
997 | ||
998 | return err; | |
999 | } | |
1000 | ||
d73f71c7 SK |
1001 | static int fastrpc_init_create_process(struct fastrpc_user *fl, |
1002 | char __user *argp) | |
1003 | { | |
1004 | struct fastrpc_init_create init; | |
1005 | struct fastrpc_invoke_args *args; | |
1006 | struct fastrpc_phy_page pages[1]; | |
1007 | struct fastrpc_map *map = NULL; | |
1008 | struct fastrpc_buf *imem = NULL; | |
1009 | int memlen; | |
1010 | int err; | |
1011 | struct { | |
1012 | int pgid; | |
1013 | u32 namelen; | |
1014 | u32 filelen; | |
1015 | u32 pageslen; | |
1016 | u32 attrs; | |
1017 | u32 siglen; | |
1018 | } inbuf; | |
1019 | u32 sc; | |
1020 | ||
1021 | args = kcalloc(FASTRPC_CREATE_PROCESS_NARGS, sizeof(*args), GFP_KERNEL); | |
1022 | if (!args) | |
1023 | return -ENOMEM; | |
1024 | ||
1025 | if (copy_from_user(&init, argp, sizeof(init))) { | |
1026 | err = -EFAULT; | |
b49f6d83 | 1027 | goto err; |
d73f71c7 SK |
1028 | } |
1029 | ||
1030 | if (init.filelen > INIT_FILELEN_MAX) { | |
1031 | err = -EINVAL; | |
b49f6d83 | 1032 | goto err; |
d73f71c7 SK |
1033 | } |
1034 | ||
1035 | inbuf.pgid = fl->tgid; | |
1036 | inbuf.namelen = strlen(current->comm) + 1; | |
1037 | inbuf.filelen = init.filelen; | |
1038 | inbuf.pageslen = 1; | |
1039 | inbuf.attrs = init.attrs; | |
1040 | inbuf.siglen = init.siglen; | |
1041 | fl->pd = 1; | |
1042 | ||
1043 | if (init.filelen && init.filefd) { | |
1044 | err = fastrpc_map_create(fl, init.filefd, init.filelen, &map); | |
1045 | if (err) | |
b49f6d83 | 1046 | goto err; |
d73f71c7 SK |
1047 | } |
1048 | ||
1049 | memlen = ALIGN(max(INIT_FILELEN_MAX, (int)init.filelen * 4), | |
1050 | 1024 * 1024); | |
1051 | err = fastrpc_buf_alloc(fl, fl->sctx->dev, memlen, | |
1052 | &imem); | |
b49f6d83 TE |
1053 | if (err) |
1054 | goto err_alloc; | |
d73f71c7 SK |
1055 | |
1056 | fl->init_mem = imem; | |
1057 | args[0].ptr = (u64)(uintptr_t)&inbuf; | |
1058 | args[0].length = sizeof(inbuf); | |
1059 | args[0].fd = -1; | |
1060 | ||
1061 | args[1].ptr = (u64)(uintptr_t)current->comm; | |
1062 | args[1].length = inbuf.namelen; | |
1063 | args[1].fd = -1; | |
1064 | ||
1065 | args[2].ptr = (u64) init.file; | |
1066 | args[2].length = inbuf.filelen; | |
1067 | args[2].fd = init.filefd; | |
1068 | ||
1069 | pages[0].addr = imem->phys; | |
1070 | pages[0].size = imem->size; | |
1071 | ||
1072 | args[3].ptr = (u64)(uintptr_t) pages; | |
1073 | args[3].length = 1 * sizeof(*pages); | |
1074 | args[3].fd = -1; | |
1075 | ||
1076 | args[4].ptr = (u64)(uintptr_t)&inbuf.attrs; | |
1077 | args[4].length = sizeof(inbuf.attrs); | |
1078 | args[4].fd = -1; | |
1079 | ||
1080 | args[5].ptr = (u64)(uintptr_t) &inbuf.siglen; | |
1081 | args[5].length = sizeof(inbuf.siglen); | |
1082 | args[5].fd = -1; | |
1083 | ||
1084 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE, 4, 0); | |
1085 | if (init.attrs) | |
1086 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE_ATTR, 6, 0); | |
1087 | ||
1088 | err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, | |
1089 | sc, args); | |
b49f6d83 TE |
1090 | if (err) |
1091 | goto err_invoke; | |
1092 | ||
1093 | kfree(args); | |
d73f71c7 | 1094 | |
b49f6d83 TE |
1095 | return 0; |
1096 | ||
1097 | err_invoke: | |
1098 | fl->init_mem = NULL; | |
1099 | fastrpc_buf_free(imem); | |
1100 | err_alloc: | |
1101 | if (map) { | |
1102 | spin_lock(&fl->lock); | |
1103 | list_del(&map->node); | |
1104 | spin_unlock(&fl->lock); | |
d73f71c7 | 1105 | fastrpc_map_put(map); |
d73f71c7 | 1106 | } |
b49f6d83 | 1107 | err: |
d73f71c7 SK |
1108 | kfree(args); |
1109 | ||
1110 | return err; | |
1111 | } | |
1112 | ||
f6f9279f SK |
1113 | static struct fastrpc_session_ctx *fastrpc_session_alloc( |
1114 | struct fastrpc_channel_ctx *cctx) | |
1115 | { | |
1116 | struct fastrpc_session_ctx *session = NULL; | |
977e6c8d | 1117 | unsigned long flags; |
f6f9279f SK |
1118 | int i; |
1119 | ||
977e6c8d | 1120 | spin_lock_irqsave(&cctx->lock, flags); |
f6f9279f SK |
1121 | for (i = 0; i < cctx->sesscount; i++) { |
1122 | if (!cctx->session[i].used && cctx->session[i].valid) { | |
1123 | cctx->session[i].used = true; | |
1124 | session = &cctx->session[i]; | |
1125 | break; | |
1126 | } | |
1127 | } | |
977e6c8d | 1128 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f SK |
1129 | |
1130 | return session; | |
1131 | } | |
1132 | ||
1133 | static void fastrpc_session_free(struct fastrpc_channel_ctx *cctx, | |
1134 | struct fastrpc_session_ctx *session) | |
1135 | { | |
977e6c8d SK |
1136 | unsigned long flags; |
1137 | ||
1138 | spin_lock_irqsave(&cctx->lock, flags); | |
f6f9279f | 1139 | session->used = false; |
977e6c8d | 1140 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f SK |
1141 | } |
1142 | ||
d73f71c7 SK |
1143 | static int fastrpc_release_current_dsp_process(struct fastrpc_user *fl) |
1144 | { | |
1145 | struct fastrpc_invoke_args args[1]; | |
1146 | int tgid = 0; | |
1147 | u32 sc; | |
1148 | ||
1149 | tgid = fl->tgid; | |
1150 | args[0].ptr = (u64)(uintptr_t) &tgid; | |
1151 | args[0].length = sizeof(tgid); | |
1152 | args[0].fd = -1; | |
1153 | args[0].reserved = 0; | |
1154 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_RELEASE, 1, 0); | |
1155 | ||
1156 | return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, | |
1157 | sc, &args[0]); | |
1158 | } | |
1159 | ||
f6f9279f SK |
1160 | static int fastrpc_device_release(struct inode *inode, struct file *file) |
1161 | { | |
1162 | struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; | |
1163 | struct fastrpc_channel_ctx *cctx = fl->cctx; | |
c68cfb71 SK |
1164 | struct fastrpc_invoke_ctx *ctx, *n; |
1165 | struct fastrpc_map *map, *m; | |
2419e55e | 1166 | struct fastrpc_buf *buf, *b; |
977e6c8d | 1167 | unsigned long flags; |
f6f9279f | 1168 | |
d73f71c7 SK |
1169 | fastrpc_release_current_dsp_process(fl); |
1170 | ||
977e6c8d | 1171 | spin_lock_irqsave(&cctx->lock, flags); |
f6f9279f | 1172 | list_del(&fl->user); |
977e6c8d | 1173 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f | 1174 | |
c68cfb71 SK |
1175 | if (fl->init_mem) |
1176 | fastrpc_buf_free(fl->init_mem); | |
1177 | ||
1178 | list_for_each_entry_safe(ctx, n, &fl->pending, node) { | |
1179 | list_del(&ctx->node); | |
1180 | fastrpc_context_put(ctx); | |
1181 | } | |
1182 | ||
1183 | list_for_each_entry_safe(map, m, &fl->maps, node) { | |
1184 | list_del(&map->node); | |
1185 | fastrpc_map_put(map); | |
1186 | } | |
1187 | ||
2419e55e JRO |
1188 | list_for_each_entry_safe(buf, b, &fl->mmaps, node) { |
1189 | list_del(&buf->node); | |
1190 | fastrpc_buf_free(buf); | |
1191 | } | |
1192 | ||
f6f9279f | 1193 | fastrpc_session_free(cctx, fl->sctx); |
278d56f9 | 1194 | fastrpc_channel_ctx_put(cctx); |
f6f9279f SK |
1195 | |
1196 | mutex_destroy(&fl->mutex); | |
1197 | kfree(fl); | |
1198 | file->private_data = NULL; | |
1199 | ||
1200 | return 0; | |
1201 | } | |
1202 | ||
1203 | static int fastrpc_device_open(struct inode *inode, struct file *filp) | |
1204 | { | |
1205 | struct fastrpc_channel_ctx *cctx = miscdev_to_cctx(filp->private_data); | |
1206 | struct fastrpc_user *fl = NULL; | |
977e6c8d | 1207 | unsigned long flags; |
f6f9279f SK |
1208 | |
1209 | fl = kzalloc(sizeof(*fl), GFP_KERNEL); | |
1210 | if (!fl) | |
1211 | return -ENOMEM; | |
1212 | ||
278d56f9 BA |
1213 | /* Released in fastrpc_device_release() */ |
1214 | fastrpc_channel_ctx_get(cctx); | |
1215 | ||
f6f9279f SK |
1216 | filp->private_data = fl; |
1217 | spin_lock_init(&fl->lock); | |
1218 | mutex_init(&fl->mutex); | |
1219 | INIT_LIST_HEAD(&fl->pending); | |
1220 | INIT_LIST_HEAD(&fl->maps); | |
2419e55e | 1221 | INIT_LIST_HEAD(&fl->mmaps); |
f6f9279f SK |
1222 | INIT_LIST_HEAD(&fl->user); |
1223 | fl->tgid = current->tgid; | |
1224 | fl->cctx = cctx; | |
7c11df42 TE |
1225 | |
1226 | fl->sctx = fastrpc_session_alloc(cctx); | |
1227 | if (!fl->sctx) { | |
1228 | dev_err(&cctx->rpdev->dev, "No session available\n"); | |
1229 | mutex_destroy(&fl->mutex); | |
1230 | kfree(fl); | |
1231 | ||
1232 | return -EBUSY; | |
1233 | } | |
1234 | ||
977e6c8d | 1235 | spin_lock_irqsave(&cctx->lock, flags); |
f6f9279f | 1236 | list_add_tail(&fl->user, &cctx->users); |
977e6c8d | 1237 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f SK |
1238 | |
1239 | return 0; | |
1240 | } | |
1241 | ||
6cffd795 SK |
1242 | static int fastrpc_dmabuf_alloc(struct fastrpc_user *fl, char __user *argp) |
1243 | { | |
1244 | struct fastrpc_alloc_dma_buf bp; | |
1245 | DEFINE_DMA_BUF_EXPORT_INFO(exp_info); | |
1246 | struct fastrpc_buf *buf = NULL; | |
1247 | int err; | |
1248 | ||
1249 | if (copy_from_user(&bp, argp, sizeof(bp))) | |
1250 | return -EFAULT; | |
1251 | ||
1252 | err = fastrpc_buf_alloc(fl, fl->sctx->dev, bp.size, &buf); | |
1253 | if (err) | |
1254 | return err; | |
1255 | exp_info.ops = &fastrpc_dma_buf_ops; | |
1256 | exp_info.size = bp.size; | |
1257 | exp_info.flags = O_RDWR; | |
1258 | exp_info.priv = buf; | |
1259 | buf->dmabuf = dma_buf_export(&exp_info); | |
1260 | if (IS_ERR(buf->dmabuf)) { | |
1261 | err = PTR_ERR(buf->dmabuf); | |
1262 | fastrpc_buf_free(buf); | |
1263 | return err; | |
1264 | } | |
1265 | ||
1266 | bp.fd = dma_buf_fd(buf->dmabuf, O_ACCMODE); | |
1267 | if (bp.fd < 0) { | |
1268 | dma_buf_put(buf->dmabuf); | |
1269 | return -EINVAL; | |
1270 | } | |
1271 | ||
1272 | if (copy_to_user(argp, &bp, sizeof(bp))) { | |
1273 | dma_buf_put(buf->dmabuf); | |
1274 | return -EFAULT; | |
1275 | } | |
1276 | ||
6cffd795 SK |
1277 | return 0; |
1278 | } | |
1279 | ||
d73f71c7 SK |
1280 | static int fastrpc_init_attach(struct fastrpc_user *fl) |
1281 | { | |
1282 | struct fastrpc_invoke_args args[1]; | |
1283 | int tgid = fl->tgid; | |
1284 | u32 sc; | |
1285 | ||
1286 | args[0].ptr = (u64)(uintptr_t) &tgid; | |
1287 | args[0].length = sizeof(tgid); | |
1288 | args[0].fd = -1; | |
1289 | args[0].reserved = 0; | |
1290 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_ATTACH, 1, 0); | |
1291 | fl->pd = 0; | |
1292 | ||
1293 | return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, | |
1294 | sc, &args[0]); | |
1295 | } | |
1296 | ||
c68cfb71 SK |
1297 | static int fastrpc_invoke(struct fastrpc_user *fl, char __user *argp) |
1298 | { | |
1299 | struct fastrpc_invoke_args *args = NULL; | |
1300 | struct fastrpc_invoke inv; | |
1301 | u32 nscalars; | |
1302 | int err; | |
1303 | ||
1304 | if (copy_from_user(&inv, argp, sizeof(inv))) | |
1305 | return -EFAULT; | |
1306 | ||
1307 | /* nscalars is truncated here to max supported value */ | |
1308 | nscalars = REMOTE_SCALARS_LENGTH(inv.sc); | |
1309 | if (nscalars) { | |
1310 | args = kcalloc(nscalars, sizeof(*args), GFP_KERNEL); | |
1311 | if (!args) | |
1312 | return -ENOMEM; | |
1313 | ||
1314 | if (copy_from_user(args, (void __user *)(uintptr_t)inv.args, | |
1315 | nscalars * sizeof(*args))) { | |
1316 | kfree(args); | |
1317 | return -EFAULT; | |
1318 | } | |
1319 | } | |
1320 | ||
1321 | err = fastrpc_internal_invoke(fl, false, inv.handle, inv.sc, args); | |
1322 | kfree(args); | |
1323 | ||
1324 | return err; | |
1325 | } | |
1326 | ||
2419e55e JRO |
1327 | static int fastrpc_req_munmap_impl(struct fastrpc_user *fl, |
1328 | struct fastrpc_req_munmap *req) | |
1329 | { | |
1330 | struct fastrpc_invoke_args args[1] = { [0] = { 0 } }; | |
1331 | struct fastrpc_buf *buf, *b; | |
1332 | struct fastrpc_munmap_req_msg req_msg; | |
1333 | struct device *dev = fl->sctx->dev; | |
1334 | int err; | |
1335 | u32 sc; | |
1336 | ||
1337 | spin_lock(&fl->lock); | |
1338 | list_for_each_entry_safe(buf, b, &fl->mmaps, node) { | |
1339 | if ((buf->raddr == req->vaddrout) && (buf->size == req->size)) | |
1340 | break; | |
1341 | buf = NULL; | |
1342 | } | |
1343 | spin_unlock(&fl->lock); | |
1344 | ||
1345 | if (!buf) { | |
1346 | dev_err(dev, "mmap not in list\n"); | |
1347 | return -EINVAL; | |
1348 | } | |
1349 | ||
1350 | req_msg.pgid = fl->tgid; | |
1351 | req_msg.size = buf->size; | |
1352 | req_msg.vaddr = buf->raddr; | |
1353 | ||
1354 | args[0].ptr = (u64) (uintptr_t) &req_msg; | |
1355 | args[0].length = sizeof(req_msg); | |
1356 | ||
1357 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MUNMAP, 1, 0); | |
1358 | err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, | |
1359 | &args[0]); | |
1360 | if (!err) { | |
1361 | dev_dbg(dev, "unmmap\tpt 0x%09lx OK\n", buf->raddr); | |
1362 | spin_lock(&fl->lock); | |
1363 | list_del(&buf->node); | |
1364 | spin_unlock(&fl->lock); | |
1365 | fastrpc_buf_free(buf); | |
1366 | } else { | |
1367 | dev_err(dev, "unmmap\tpt 0x%09lx ERROR\n", buf->raddr); | |
1368 | } | |
1369 | ||
1370 | return err; | |
1371 | } | |
1372 | ||
1373 | static int fastrpc_req_munmap(struct fastrpc_user *fl, char __user *argp) | |
1374 | { | |
1375 | struct fastrpc_req_munmap req; | |
1376 | ||
1377 | if (copy_from_user(&req, argp, sizeof(req))) | |
1378 | return -EFAULT; | |
1379 | ||
1380 | return fastrpc_req_munmap_impl(fl, &req); | |
1381 | } | |
1382 | ||
1383 | static int fastrpc_req_mmap(struct fastrpc_user *fl, char __user *argp) | |
1384 | { | |
1385 | struct fastrpc_invoke_args args[3] = { [0 ... 2] = { 0 } }; | |
1386 | struct fastrpc_buf *buf = NULL; | |
1387 | struct fastrpc_mmap_req_msg req_msg; | |
1388 | struct fastrpc_mmap_rsp_msg rsp_msg; | |
1389 | struct fastrpc_req_munmap req_unmap; | |
1390 | struct fastrpc_phy_page pages; | |
1391 | struct fastrpc_req_mmap req; | |
1392 | struct device *dev = fl->sctx->dev; | |
1393 | int err; | |
1394 | u32 sc; | |
1395 | ||
1396 | if (copy_from_user(&req, argp, sizeof(req))) | |
1397 | return -EFAULT; | |
1398 | ||
1399 | if (req.flags != ADSP_MMAP_ADD_PAGES) { | |
1400 | dev_err(dev, "flag not supported 0x%x\n", req.flags); | |
1401 | return -EINVAL; | |
1402 | } | |
1403 | ||
1404 | if (req.vaddrin) { | |
1405 | dev_err(dev, "adding user allocated pages is not supported\n"); | |
1406 | return -EINVAL; | |
1407 | } | |
1408 | ||
1409 | err = fastrpc_buf_alloc(fl, fl->sctx->dev, req.size, &buf); | |
1410 | if (err) { | |
1411 | dev_err(dev, "failed to allocate buffer\n"); | |
1412 | return err; | |
1413 | } | |
1414 | ||
1415 | req_msg.pgid = fl->tgid; | |
1416 | req_msg.flags = req.flags; | |
1417 | req_msg.vaddr = req.vaddrin; | |
1418 | req_msg.num = sizeof(pages); | |
1419 | ||
1420 | args[0].ptr = (u64) (uintptr_t) &req_msg; | |
1421 | args[0].length = sizeof(req_msg); | |
1422 | ||
1423 | pages.addr = buf->phys; | |
1424 | pages.size = buf->size; | |
1425 | ||
1426 | args[1].ptr = (u64) (uintptr_t) &pages; | |
1427 | args[1].length = sizeof(pages); | |
1428 | ||
1429 | args[2].ptr = (u64) (uintptr_t) &rsp_msg; | |
1430 | args[2].length = sizeof(rsp_msg); | |
1431 | ||
1432 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MMAP, 2, 1); | |
1433 | err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, | |
1434 | &args[0]); | |
1435 | if (err) { | |
1436 | dev_err(dev, "mmap error (len 0x%08llx)\n", buf->size); | |
1437 | goto err_invoke; | |
1438 | } | |
1439 | ||
1440 | /* update the buffer to be able to deallocate the memory on the DSP */ | |
1441 | buf->raddr = (uintptr_t) rsp_msg.vaddr; | |
1442 | ||
1443 | /* let the client know the address to use */ | |
1444 | req.vaddrout = rsp_msg.vaddr; | |
1445 | ||
1446 | spin_lock(&fl->lock); | |
1447 | list_add_tail(&buf->node, &fl->mmaps); | |
1448 | spin_unlock(&fl->lock); | |
1449 | ||
1450 | if (copy_to_user((void __user *)argp, &req, sizeof(req))) { | |
1451 | /* unmap the memory and release the buffer */ | |
1452 | req_unmap.vaddrout = buf->raddr; | |
1453 | req_unmap.size = buf->size; | |
1454 | fastrpc_req_munmap_impl(fl, &req_unmap); | |
1455 | return -EFAULT; | |
1456 | } | |
1457 | ||
1458 | dev_dbg(dev, "mmap\t\tpt 0x%09lx OK [len 0x%08llx]\n", | |
1459 | buf->raddr, buf->size); | |
1460 | ||
1461 | return 0; | |
1462 | ||
1463 | err_invoke: | |
1464 | fastrpc_buf_free(buf); | |
1465 | ||
1466 | return err; | |
1467 | } | |
1468 | ||
c68cfb71 SK |
1469 | static long fastrpc_device_ioctl(struct file *file, unsigned int cmd, |
1470 | unsigned long arg) | |
1471 | { | |
1472 | struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; | |
1473 | char __user *argp = (char __user *)arg; | |
1474 | int err; | |
1475 | ||
1476 | switch (cmd) { | |
1477 | case FASTRPC_IOCTL_INVOKE: | |
1478 | err = fastrpc_invoke(fl, argp); | |
1479 | break; | |
d73f71c7 SK |
1480 | case FASTRPC_IOCTL_INIT_ATTACH: |
1481 | err = fastrpc_init_attach(fl); | |
1482 | break; | |
1483 | case FASTRPC_IOCTL_INIT_CREATE: | |
1484 | err = fastrpc_init_create_process(fl, argp); | |
1485 | break; | |
6cffd795 SK |
1486 | case FASTRPC_IOCTL_ALLOC_DMA_BUFF: |
1487 | err = fastrpc_dmabuf_alloc(fl, argp); | |
1488 | break; | |
2419e55e JRO |
1489 | case FASTRPC_IOCTL_MMAP: |
1490 | err = fastrpc_req_mmap(fl, argp); | |
1491 | break; | |
1492 | case FASTRPC_IOCTL_MUNMAP: | |
1493 | err = fastrpc_req_munmap(fl, argp); | |
1494 | break; | |
c68cfb71 SK |
1495 | default: |
1496 | err = -ENOTTY; | |
1497 | break; | |
1498 | } | |
1499 | ||
1500 | return err; | |
1501 | } | |
1502 | ||
f6f9279f SK |
1503 | static const struct file_operations fastrpc_fops = { |
1504 | .open = fastrpc_device_open, | |
1505 | .release = fastrpc_device_release, | |
c68cfb71 SK |
1506 | .unlocked_ioctl = fastrpc_device_ioctl, |
1507 | .compat_ioctl = fastrpc_device_ioctl, | |
f6f9279f SK |
1508 | }; |
1509 | ||
1510 | static int fastrpc_cb_probe(struct platform_device *pdev) | |
1511 | { | |
1512 | struct fastrpc_channel_ctx *cctx; | |
1513 | struct fastrpc_session_ctx *sess; | |
1514 | struct device *dev = &pdev->dev; | |
1515 | int i, sessions = 0; | |
977e6c8d | 1516 | unsigned long flags; |
01b76c32 | 1517 | int rc; |
f6f9279f SK |
1518 | |
1519 | cctx = dev_get_drvdata(dev->parent); | |
1520 | if (!cctx) | |
1521 | return -EINVAL; | |
1522 | ||
1523 | of_property_read_u32(dev->of_node, "qcom,nsessions", &sessions); | |
1524 | ||
977e6c8d | 1525 | spin_lock_irqsave(&cctx->lock, flags); |
f6f9279f SK |
1526 | sess = &cctx->session[cctx->sesscount]; |
1527 | sess->used = false; | |
1528 | sess->valid = true; | |
1529 | sess->dev = dev; | |
1530 | dev_set_drvdata(dev, sess); | |
1531 | ||
1532 | if (of_property_read_u32(dev->of_node, "reg", &sess->sid)) | |
1533 | dev_info(dev, "FastRPC Session ID not specified in DT\n"); | |
1534 | ||
1535 | if (sessions > 0) { | |
1536 | struct fastrpc_session_ctx *dup_sess; | |
1537 | ||
1538 | for (i = 1; i < sessions; i++) { | |
1539 | if (cctx->sesscount++ >= FASTRPC_MAX_SESSIONS) | |
1540 | break; | |
1541 | dup_sess = &cctx->session[cctx->sesscount]; | |
1542 | memcpy(dup_sess, sess, sizeof(*dup_sess)); | |
1543 | } | |
1544 | } | |
1545 | cctx->sesscount++; | |
977e6c8d | 1546 | spin_unlock_irqrestore(&cctx->lock, flags); |
01b76c32 BY |
1547 | rc = dma_set_mask(dev, DMA_BIT_MASK(32)); |
1548 | if (rc) { | |
1549 | dev_err(dev, "32-bit DMA enable failed\n"); | |
1550 | return rc; | |
1551 | } | |
f6f9279f SK |
1552 | |
1553 | return 0; | |
1554 | } | |
1555 | ||
1556 | static int fastrpc_cb_remove(struct platform_device *pdev) | |
1557 | { | |
1558 | struct fastrpc_channel_ctx *cctx = dev_get_drvdata(pdev->dev.parent); | |
1559 | struct fastrpc_session_ctx *sess = dev_get_drvdata(&pdev->dev); | |
977e6c8d | 1560 | unsigned long flags; |
f6f9279f SK |
1561 | int i; |
1562 | ||
977e6c8d | 1563 | spin_lock_irqsave(&cctx->lock, flags); |
f6f9279f SK |
1564 | for (i = 1; i < FASTRPC_MAX_SESSIONS; i++) { |
1565 | if (cctx->session[i].sid == sess->sid) { | |
1566 | cctx->session[i].valid = false; | |
1567 | cctx->sesscount--; | |
1568 | } | |
1569 | } | |
977e6c8d | 1570 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f SK |
1571 | |
1572 | return 0; | |
1573 | } | |
1574 | ||
1575 | static const struct of_device_id fastrpc_match_table[] = { | |
1576 | { .compatible = "qcom,fastrpc-compute-cb", }, | |
1577 | {} | |
1578 | }; | |
1579 | ||
1580 | static struct platform_driver fastrpc_cb_driver = { | |
1581 | .probe = fastrpc_cb_probe, | |
1582 | .remove = fastrpc_cb_remove, | |
1583 | .driver = { | |
1584 | .name = "qcom,fastrpc-cb", | |
1585 | .of_match_table = fastrpc_match_table, | |
1586 | .suppress_bind_attrs = true, | |
1587 | }, | |
1588 | }; | |
1589 | ||
1590 | static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev) | |
1591 | { | |
1592 | struct device *rdev = &rpdev->dev; | |
1593 | struct fastrpc_channel_ctx *data; | |
1594 | int i, err, domain_id = -1; | |
1595 | const char *domain; | |
1596 | ||
f6f9279f SK |
1597 | err = of_property_read_string(rdev->of_node, "label", &domain); |
1598 | if (err) { | |
1599 | dev_info(rdev, "FastRPC Domain not specified in DT\n"); | |
1600 | return err; | |
1601 | } | |
1602 | ||
1603 | for (i = 0; i <= CDSP_DOMAIN_ID; i++) { | |
1604 | if (!strcmp(domains[i], domain)) { | |
1605 | domain_id = i; | |
1606 | break; | |
1607 | } | |
1608 | } | |
1609 | ||
1610 | if (domain_id < 0) { | |
1611 | dev_info(rdev, "FastRPC Invalid Domain ID %d\n", domain_id); | |
1612 | return -EINVAL; | |
1613 | } | |
1614 | ||
278d56f9 BA |
1615 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
1616 | if (!data) | |
1617 | return -ENOMEM; | |
1618 | ||
f6f9279f | 1619 | data->miscdev.minor = MISC_DYNAMIC_MINOR; |
2d10d2d1 SK |
1620 | data->miscdev.name = devm_kasprintf(rdev, GFP_KERNEL, "fastrpc-%s", |
1621 | domains[domain_id]); | |
f6f9279f SK |
1622 | data->miscdev.fops = &fastrpc_fops; |
1623 | err = misc_register(&data->miscdev); | |
1624 | if (err) | |
1625 | return err; | |
1626 | ||
278d56f9 BA |
1627 | kref_init(&data->refcount); |
1628 | ||
f6f9279f SK |
1629 | dev_set_drvdata(&rpdev->dev, data); |
1630 | dma_set_mask_and_coherent(rdev, DMA_BIT_MASK(32)); | |
1631 | INIT_LIST_HEAD(&data->users); | |
1632 | spin_lock_init(&data->lock); | |
1633 | idr_init(&data->ctx_idr); | |
1634 | data->domain_id = domain_id; | |
1635 | data->rpdev = rpdev; | |
1636 | ||
1637 | return of_platform_populate(rdev->of_node, NULL, NULL, rdev); | |
1638 | } | |
1639 | ||
c68cfb71 SK |
1640 | static void fastrpc_notify_users(struct fastrpc_user *user) |
1641 | { | |
1642 | struct fastrpc_invoke_ctx *ctx; | |
1643 | ||
1644 | spin_lock(&user->lock); | |
1645 | list_for_each_entry(ctx, &user->pending, node) | |
1646 | complete(&ctx->work); | |
1647 | spin_unlock(&user->lock); | |
1648 | } | |
1649 | ||
f6f9279f SK |
1650 | static void fastrpc_rpmsg_remove(struct rpmsg_device *rpdev) |
1651 | { | |
1652 | struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); | |
c68cfb71 | 1653 | struct fastrpc_user *user; |
977e6c8d | 1654 | unsigned long flags; |
c68cfb71 | 1655 | |
977e6c8d | 1656 | spin_lock_irqsave(&cctx->lock, flags); |
c68cfb71 SK |
1657 | list_for_each_entry(user, &cctx->users, user) |
1658 | fastrpc_notify_users(user); | |
977e6c8d | 1659 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f SK |
1660 | |
1661 | misc_deregister(&cctx->miscdev); | |
1662 | of_platform_depopulate(&rpdev->dev); | |
278d56f9 | 1663 | |
2e369878 | 1664 | cctx->rpdev = NULL; |
278d56f9 | 1665 | fastrpc_channel_ctx_put(cctx); |
f6f9279f SK |
1666 | } |
1667 | ||
1668 | static int fastrpc_rpmsg_callback(struct rpmsg_device *rpdev, void *data, | |
1669 | int len, void *priv, u32 addr) | |
1670 | { | |
c68cfb71 SK |
1671 | struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); |
1672 | struct fastrpc_invoke_rsp *rsp = data; | |
1673 | struct fastrpc_invoke_ctx *ctx; | |
1674 | unsigned long flags; | |
1675 | unsigned long ctxid; | |
1676 | ||
1677 | if (len < sizeof(*rsp)) | |
1678 | return -EINVAL; | |
1679 | ||
1680 | ctxid = ((rsp->ctx & FASTRPC_CTXID_MASK) >> 4); | |
1681 | ||
1682 | spin_lock_irqsave(&cctx->lock, flags); | |
1683 | ctx = idr_find(&cctx->ctx_idr, ctxid); | |
1684 | spin_unlock_irqrestore(&cctx->lock, flags); | |
1685 | ||
1686 | if (!ctx) { | |
1687 | dev_err(&rpdev->dev, "No context ID matches response\n"); | |
1688 | return -ENOENT; | |
1689 | } | |
1690 | ||
1691 | ctx->retval = rsp->retval; | |
1692 | complete(&ctx->work); | |
8e7389c7 TE |
1693 | |
1694 | /* | |
1695 | * The DMA buffer associated with the context cannot be freed in | |
1696 | * interrupt context so schedule it through a worker thread to | |
1697 | * avoid a kernel BUG. | |
1698 | */ | |
1699 | schedule_work(&ctx->put_work); | |
c68cfb71 | 1700 | |
f6f9279f SK |
1701 | return 0; |
1702 | } | |
1703 | ||
1704 | static const struct of_device_id fastrpc_rpmsg_of_match[] = { | |
1705 | { .compatible = "qcom,fastrpc" }, | |
1706 | { }, | |
1707 | }; | |
1708 | MODULE_DEVICE_TABLE(of, fastrpc_rpmsg_of_match); | |
1709 | ||
1710 | static struct rpmsg_driver fastrpc_driver = { | |
1711 | .probe = fastrpc_rpmsg_probe, | |
1712 | .remove = fastrpc_rpmsg_remove, | |
1713 | .callback = fastrpc_rpmsg_callback, | |
1714 | .drv = { | |
1715 | .name = "qcom,fastrpc", | |
1716 | .of_match_table = fastrpc_rpmsg_of_match, | |
1717 | }, | |
1718 | }; | |
1719 | ||
1720 | static int fastrpc_init(void) | |
1721 | { | |
1722 | int ret; | |
1723 | ||
1724 | ret = platform_driver_register(&fastrpc_cb_driver); | |
1725 | if (ret < 0) { | |
1726 | pr_err("fastrpc: failed to register cb driver\n"); | |
1727 | return ret; | |
1728 | } | |
1729 | ||
1730 | ret = register_rpmsg_driver(&fastrpc_driver); | |
1731 | if (ret < 0) { | |
1732 | pr_err("fastrpc: failed to register rpmsg driver\n"); | |
1733 | platform_driver_unregister(&fastrpc_cb_driver); | |
1734 | return ret; | |
1735 | } | |
1736 | ||
1737 | return 0; | |
1738 | } | |
1739 | module_init(fastrpc_init); | |
1740 | ||
1741 | static void fastrpc_exit(void) | |
1742 | { | |
1743 | platform_driver_unregister(&fastrpc_cb_driver); | |
1744 | unregister_rpmsg_driver(&fastrpc_driver); | |
1745 | } | |
1746 | module_exit(fastrpc_exit); | |
1747 | ||
1748 | MODULE_LICENSE("GPL v2"); |