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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> | |
e90d9119 | 20 | #include <linux/qcom_scm.h> |
c68cfb71 | 21 | #include <uapi/misc/fastrpc.h> |
1ce91d45 | 22 | #include <linux/of_reserved_mem.h> |
f6f9279f SK |
23 | |
24 | #define ADSP_DOMAIN_ID (0) | |
25 | #define MDSP_DOMAIN_ID (1) | |
26 | #define SDSP_DOMAIN_ID (2) | |
27 | #define CDSP_DOMAIN_ID (3) | |
28 | #define FASTRPC_DEV_MAX 4 /* adsp, mdsp, slpi, cdsp*/ | |
689a2d9f | 29 | #define FASTRPC_MAX_SESSIONS 14 |
e90d9119 | 30 | #define FASTRPC_MAX_VMIDS 16 |
c68cfb71 SK |
31 | #define FASTRPC_ALIGN 128 |
32 | #define FASTRPC_MAX_FDLIST 16 | |
33 | #define FASTRPC_MAX_CRCLIST 64 | |
34 | #define FASTRPC_PHYS(p) ((p) & 0xffffffff) | |
f6f9279f | 35 | #define FASTRPC_CTX_MAX (256) |
d73f71c7 | 36 | #define FASTRPC_INIT_HANDLE 1 |
6c16fd8b | 37 | #define FASTRPC_DSP_UTILITIES_HANDLE 2 |
f6f9279f | 38 | #define FASTRPC_CTXID_MASK (0xFF0) |
efcd2390 | 39 | #define INIT_FILELEN_MAX (2 * 1024 * 1024) |
f6f9279f | 40 | #define FASTRPC_DEVICE_NAME "fastrpc" |
2419e55e | 41 | #define ADSP_MMAP_ADD_PAGES 0x1000 |
6c16fd8b J |
42 | #define DSP_UNSUPPORTED_API (0x80000414) |
43 | /* MAX NUMBER of DSP ATTRIBUTES SUPPORTED */ | |
44 | #define FASTRPC_MAX_DSP_ATTRIBUTES (256) | |
45 | #define FASTRPC_MAX_DSP_ATTRIBUTES_LEN (sizeof(u32) * FASTRPC_MAX_DSP_ATTRIBUTES) | |
f6f9279f | 46 | |
c68cfb71 SK |
47 | /* Retrives number of input buffers from the scalars parameter */ |
48 | #define REMOTE_SCALARS_INBUFS(sc) (((sc) >> 16) & 0x0ff) | |
49 | ||
50 | /* Retrives number of output buffers from the scalars parameter */ | |
51 | #define REMOTE_SCALARS_OUTBUFS(sc) (((sc) >> 8) & 0x0ff) | |
52 | ||
53 | /* Retrives number of input handles from the scalars parameter */ | |
54 | #define REMOTE_SCALARS_INHANDLES(sc) (((sc) >> 4) & 0x0f) | |
55 | ||
56 | /* Retrives number of output handles from the scalars parameter */ | |
57 | #define REMOTE_SCALARS_OUTHANDLES(sc) ((sc) & 0x0f) | |
58 | ||
59 | #define REMOTE_SCALARS_LENGTH(sc) (REMOTE_SCALARS_INBUFS(sc) + \ | |
60 | REMOTE_SCALARS_OUTBUFS(sc) + \ | |
61 | REMOTE_SCALARS_INHANDLES(sc)+ \ | |
62 | REMOTE_SCALARS_OUTHANDLES(sc)) | |
63 | #define FASTRPC_BUILD_SCALARS(attr, method, in, out, oin, oout) \ | |
64 | (((attr & 0x07) << 29) | \ | |
65 | ((method & 0x1f) << 24) | \ | |
66 | ((in & 0xff) << 16) | \ | |
67 | ((out & 0xff) << 8) | \ | |
68 | ((oin & 0x0f) << 4) | \ | |
69 | (oout & 0x0f)) | |
70 | ||
71 | #define FASTRPC_SCALARS(method, in, out) \ | |
72 | FASTRPC_BUILD_SCALARS(0, method, in, out, 0, 0) | |
73 | ||
d73f71c7 SK |
74 | #define FASTRPC_CREATE_PROCESS_NARGS 6 |
75 | /* Remote Method id table */ | |
76 | #define FASTRPC_RMID_INIT_ATTACH 0 | |
77 | #define FASTRPC_RMID_INIT_RELEASE 1 | |
2419e55e JRO |
78 | #define FASTRPC_RMID_INIT_MMAP 4 |
79 | #define FASTRPC_RMID_INIT_MUNMAP 5 | |
d73f71c7 SK |
80 | #define FASTRPC_RMID_INIT_CREATE 6 |
81 | #define FASTRPC_RMID_INIT_CREATE_ATTR 7 | |
82 | #define FASTRPC_RMID_INIT_CREATE_STATIC 8 | |
5c1b97c7 J |
83 | #define FASTRPC_RMID_INIT_MEM_MAP 10 |
84 | #define FASTRPC_RMID_INIT_MEM_UNMAP 11 | |
d73f71c7 | 85 | |
84195d20 | 86 | /* Protection Domain(PD) ids */ |
1959ab9e | 87 | #define ROOT_PD (0) |
84195d20 JM |
88 | #define USER_PD (1) |
89 | #define SENSORS_PD (2) | |
90 | ||
965602ea | 91 | #define miscdev_to_fdevice(d) container_of(d, struct fastrpc_device, miscdev) |
f6f9279f SK |
92 | |
93 | static const char *domains[FASTRPC_DEV_MAX] = { "adsp", "mdsp", | |
94 | "sdsp", "cdsp"}; | |
c68cfb71 SK |
95 | struct fastrpc_phy_page { |
96 | u64 addr; /* physical address */ | |
97 | u64 size; /* size of contiguous region */ | |
98 | }; | |
99 | ||
100 | struct fastrpc_invoke_buf { | |
101 | u32 num; /* number of contiguous regions */ | |
102 | u32 pgidx; /* index to start of contiguous region */ | |
103 | }; | |
104 | ||
35a82b87 VKG |
105 | struct fastrpc_remote_dmahandle { |
106 | s32 fd; /* dma handle fd */ | |
107 | u32 offset; /* dma handle offset */ | |
108 | u32 len; /* dma handle length */ | |
109 | }; | |
110 | ||
111 | struct fastrpc_remote_buf { | |
112 | u64 pv; /* buffer pointer */ | |
113 | u64 len; /* length of buffer */ | |
114 | }; | |
115 | ||
116 | union fastrpc_remote_arg { | |
117 | struct fastrpc_remote_buf buf; | |
118 | struct fastrpc_remote_dmahandle dma; | |
c68cfb71 SK |
119 | }; |
120 | ||
2419e55e JRO |
121 | struct fastrpc_mmap_rsp_msg { |
122 | u64 vaddr; | |
123 | }; | |
124 | ||
125 | struct fastrpc_mmap_req_msg { | |
126 | s32 pgid; | |
127 | u32 flags; | |
128 | u64 vaddr; | |
129 | s32 num; | |
130 | }; | |
131 | ||
5c1b97c7 J |
132 | struct fastrpc_mem_map_req_msg { |
133 | s32 pgid; | |
134 | s32 fd; | |
135 | s32 offset; | |
136 | u32 flags; | |
137 | u64 vaddrin; | |
138 | s32 num; | |
139 | s32 data_len; | |
140 | }; | |
141 | ||
2419e55e JRO |
142 | struct fastrpc_munmap_req_msg { |
143 | s32 pgid; | |
144 | u64 vaddr; | |
145 | u64 size; | |
146 | }; | |
147 | ||
5c1b97c7 J |
148 | struct fastrpc_mem_unmap_req_msg { |
149 | s32 pgid; | |
150 | s32 fd; | |
151 | u64 vaddrin; | |
152 | u64 len; | |
153 | }; | |
154 | ||
c68cfb71 SK |
155 | struct fastrpc_msg { |
156 | int pid; /* process group id */ | |
157 | int tid; /* thread id */ | |
158 | u64 ctx; /* invoke caller context */ | |
159 | u32 handle; /* handle to invoke */ | |
160 | u32 sc; /* scalars structure describing the data */ | |
161 | u64 addr; /* physical address */ | |
162 | u64 size; /* size of contiguous region */ | |
163 | }; | |
164 | ||
165 | struct fastrpc_invoke_rsp { | |
166 | u64 ctx; /* invoke caller context */ | |
167 | int retval; /* invoke return value */ | |
168 | }; | |
169 | ||
25e8dfb8 SK |
170 | struct fastrpc_buf_overlap { |
171 | u64 start; | |
172 | u64 end; | |
173 | int raix; | |
174 | u64 mstart; | |
175 | u64 mend; | |
176 | u64 offset; | |
177 | }; | |
178 | ||
c68cfb71 SK |
179 | struct fastrpc_buf { |
180 | struct fastrpc_user *fl; | |
6cffd795 | 181 | struct dma_buf *dmabuf; |
c68cfb71 SK |
182 | struct device *dev; |
183 | void *virt; | |
184 | u64 phys; | |
185 | u64 size; | |
6cffd795 SK |
186 | /* Lock for dma buf attachments */ |
187 | struct mutex lock; | |
188 | struct list_head attachments; | |
2419e55e JRO |
189 | /* mmap support */ |
190 | struct list_head node; /* list of user requested mmaps */ | |
191 | uintptr_t raddr; | |
6cffd795 SK |
192 | }; |
193 | ||
194 | struct fastrpc_dma_buf_attachment { | |
195 | struct device *dev; | |
196 | struct sg_table sgt; | |
197 | struct list_head node; | |
c68cfb71 SK |
198 | }; |
199 | ||
200 | struct fastrpc_map { | |
201 | struct list_head node; | |
202 | struct fastrpc_user *fl; | |
203 | int fd; | |
204 | struct dma_buf *buf; | |
205 | struct sg_table *table; | |
206 | struct dma_buf_attachment *attach; | |
207 | u64 phys; | |
208 | u64 size; | |
209 | void *va; | |
210 | u64 len; | |
5c1b97c7 | 211 | u64 raddr; |
e90d9119 | 212 | u32 attr; |
c68cfb71 SK |
213 | struct kref refcount; |
214 | }; | |
215 | ||
216 | struct fastrpc_invoke_ctx { | |
217 | int nscalars; | |
218 | int nbufs; | |
219 | int retval; | |
220 | int pid; | |
221 | int tgid; | |
222 | u32 sc; | |
223 | u32 *crc; | |
224 | u64 ctxid; | |
225 | u64 msg_sz; | |
226 | struct kref refcount; | |
227 | struct list_head node; /* list of ctxs */ | |
228 | struct completion work; | |
8e7389c7 | 229 | struct work_struct put_work; |
c68cfb71 SK |
230 | struct fastrpc_msg msg; |
231 | struct fastrpc_user *fl; | |
35a82b87 | 232 | union fastrpc_remote_arg *rpra; |
c68cfb71 SK |
233 | struct fastrpc_map **maps; |
234 | struct fastrpc_buf *buf; | |
235 | struct fastrpc_invoke_args *args; | |
25e8dfb8 | 236 | struct fastrpc_buf_overlap *olaps; |
c68cfb71 SK |
237 | struct fastrpc_channel_ctx *cctx; |
238 | }; | |
f6f9279f SK |
239 | |
240 | struct fastrpc_session_ctx { | |
241 | struct device *dev; | |
242 | int sid; | |
243 | bool used; | |
244 | bool valid; | |
245 | }; | |
246 | ||
247 | struct fastrpc_channel_ctx { | |
248 | int domain_id; | |
249 | int sesscount; | |
e90d9119 VKG |
250 | int vmcount; |
251 | u32 perms; | |
252 | struct qcom_scm_vmperm vmperms[FASTRPC_MAX_VMIDS]; | |
f6f9279f SK |
253 | struct rpmsg_device *rpdev; |
254 | struct fastrpc_session_ctx session[FASTRPC_MAX_SESSIONS]; | |
255 | spinlock_t lock; | |
256 | struct idr ctx_idr; | |
257 | struct list_head users; | |
278d56f9 | 258 | struct kref refcount; |
6c16fd8b J |
259 | /* Flag if dsp attributes are cached */ |
260 | bool valid_attributes; | |
261 | u32 dsp_attributes[FASTRPC_MAX_DSP_ATTRIBUTES]; | |
3abe3ab3 | 262 | struct fastrpc_device *secure_fdevice; |
965602ea | 263 | struct fastrpc_device *fdevice; |
3abe3ab3 | 264 | bool secure; |
7f1f4812 | 265 | bool unsigned_support; |
965602ea SK |
266 | }; |
267 | ||
268 | struct fastrpc_device { | |
269 | struct fastrpc_channel_ctx *cctx; | |
270 | struct miscdevice miscdev; | |
3abe3ab3 | 271 | bool secure; |
f6f9279f SK |
272 | }; |
273 | ||
274 | struct fastrpc_user { | |
275 | struct list_head user; | |
276 | struct list_head maps; | |
277 | struct list_head pending; | |
2419e55e | 278 | struct list_head mmaps; |
f6f9279f SK |
279 | |
280 | struct fastrpc_channel_ctx *cctx; | |
281 | struct fastrpc_session_ctx *sctx; | |
c68cfb71 | 282 | struct fastrpc_buf *init_mem; |
f6f9279f SK |
283 | |
284 | int tgid; | |
285 | int pd; | |
7f1f4812 | 286 | bool is_secure_dev; |
f6f9279f SK |
287 | /* Lock for lists */ |
288 | spinlock_t lock; | |
289 | /* lock for allocations */ | |
290 | struct mutex mutex; | |
291 | }; | |
292 | ||
c68cfb71 SK |
293 | static void fastrpc_free_map(struct kref *ref) |
294 | { | |
295 | struct fastrpc_map *map; | |
296 | ||
297 | map = container_of(ref, struct fastrpc_map, refcount); | |
298 | ||
299 | if (map->table) { | |
e90d9119 VKG |
300 | if (map->attr & FASTRPC_ATTR_SECUREMAP) { |
301 | struct qcom_scm_vmperm perm; | |
302 | int err = 0; | |
303 | ||
304 | perm.vmid = QCOM_SCM_VMID_HLOS; | |
305 | perm.perm = QCOM_SCM_PERM_RWX; | |
306 | err = qcom_scm_assign_mem(map->phys, map->size, | |
307 | &(map->fl->cctx->vmperms[0].vmid), &perm, 1); | |
308 | if (err) { | |
309 | dev_err(map->fl->sctx->dev, "Failed to assign memory phys 0x%llx size 0x%llx err %d", | |
310 | map->phys, map->size, err); | |
311 | return; | |
312 | } | |
313 | } | |
c68cfb71 SK |
314 | dma_buf_unmap_attachment(map->attach, map->table, |
315 | DMA_BIDIRECTIONAL); | |
316 | dma_buf_detach(map->buf, map->attach); | |
317 | dma_buf_put(map->buf); | |
318 | } | |
319 | ||
320 | kfree(map); | |
321 | } | |
322 | ||
323 | static void fastrpc_map_put(struct fastrpc_map *map) | |
324 | { | |
325 | if (map) | |
326 | kref_put(&map->refcount, fastrpc_free_map); | |
327 | } | |
328 | ||
329 | static void fastrpc_map_get(struct fastrpc_map *map) | |
330 | { | |
331 | if (map) | |
332 | kref_get(&map->refcount); | |
333 | } | |
334 | ||
8f6c1d8c VKG |
335 | |
336 | static int fastrpc_map_lookup(struct fastrpc_user *fl, int fd, | |
c68cfb71 SK |
337 | struct fastrpc_map **ppmap) |
338 | { | |
339 | struct fastrpc_map *map = NULL; | |
340 | ||
341 | mutex_lock(&fl->mutex); | |
342 | list_for_each_entry(map, &fl->maps, node) { | |
343 | if (map->fd == fd) { | |
c68cfb71 SK |
344 | *ppmap = map; |
345 | mutex_unlock(&fl->mutex); | |
346 | return 0; | |
347 | } | |
348 | } | |
349 | mutex_unlock(&fl->mutex); | |
350 | ||
351 | return -ENOENT; | |
352 | } | |
353 | ||
8f6c1d8c VKG |
354 | static int fastrpc_map_find(struct fastrpc_user *fl, int fd, |
355 | struct fastrpc_map **ppmap) | |
356 | { | |
357 | int ret = fastrpc_map_lookup(fl, fd, ppmap); | |
358 | ||
359 | if (!ret) | |
360 | fastrpc_map_get(*ppmap); | |
361 | ||
362 | return ret; | |
363 | } | |
364 | ||
c68cfb71 SK |
365 | static void fastrpc_buf_free(struct fastrpc_buf *buf) |
366 | { | |
367 | dma_free_coherent(buf->dev, buf->size, buf->virt, | |
368 | FASTRPC_PHYS(buf->phys)); | |
369 | kfree(buf); | |
370 | } | |
371 | ||
6f18c7e8 | 372 | static int __fastrpc_buf_alloc(struct fastrpc_user *fl, struct device *dev, |
c68cfb71 SK |
373 | u64 size, struct fastrpc_buf **obuf) |
374 | { | |
375 | struct fastrpc_buf *buf; | |
376 | ||
377 | buf = kzalloc(sizeof(*buf), GFP_KERNEL); | |
378 | if (!buf) | |
379 | return -ENOMEM; | |
380 | ||
6cffd795 | 381 | INIT_LIST_HEAD(&buf->attachments); |
2419e55e | 382 | INIT_LIST_HEAD(&buf->node); |
6cffd795 SK |
383 | mutex_init(&buf->lock); |
384 | ||
c68cfb71 SK |
385 | buf->fl = fl; |
386 | buf->virt = NULL; | |
387 | buf->phys = 0; | |
388 | buf->size = size; | |
389 | buf->dev = dev; | |
2419e55e | 390 | buf->raddr = 0; |
c68cfb71 SK |
391 | |
392 | buf->virt = dma_alloc_coherent(dev, buf->size, (dma_addr_t *)&buf->phys, | |
393 | GFP_KERNEL); | |
41db5f83 JRO |
394 | if (!buf->virt) { |
395 | mutex_destroy(&buf->lock); | |
396 | kfree(buf); | |
c68cfb71 | 397 | return -ENOMEM; |
41db5f83 | 398 | } |
c68cfb71 | 399 | |
6f18c7e8 AV |
400 | *obuf = buf; |
401 | ||
402 | return 0; | |
403 | } | |
404 | ||
405 | static int fastrpc_buf_alloc(struct fastrpc_user *fl, struct device *dev, | |
406 | u64 size, struct fastrpc_buf **obuf) | |
407 | { | |
408 | int ret; | |
409 | struct fastrpc_buf *buf; | |
410 | ||
411 | ret = __fastrpc_buf_alloc(fl, dev, size, obuf); | |
412 | if (ret) | |
413 | return ret; | |
414 | ||
415 | buf = *obuf; | |
416 | ||
c68cfb71 SK |
417 | if (fl->sctx && fl->sctx->sid) |
418 | buf->phys += ((u64)fl->sctx->sid << 32); | |
419 | ||
c68cfb71 SK |
420 | return 0; |
421 | } | |
422 | ||
6f18c7e8 AV |
423 | static int fastrpc_remote_heap_alloc(struct fastrpc_user *fl, struct device *dev, |
424 | u64 size, struct fastrpc_buf **obuf) | |
425 | { | |
426 | struct device *rdev = &fl->cctx->rpdev->dev; | |
427 | ||
428 | return __fastrpc_buf_alloc(fl, rdev, size, obuf); | |
429 | } | |
430 | ||
278d56f9 BA |
431 | static void fastrpc_channel_ctx_free(struct kref *ref) |
432 | { | |
433 | struct fastrpc_channel_ctx *cctx; | |
434 | ||
435 | cctx = container_of(ref, struct fastrpc_channel_ctx, refcount); | |
436 | ||
437 | kfree(cctx); | |
438 | } | |
439 | ||
440 | static void fastrpc_channel_ctx_get(struct fastrpc_channel_ctx *cctx) | |
441 | { | |
442 | kref_get(&cctx->refcount); | |
443 | } | |
444 | ||
445 | static void fastrpc_channel_ctx_put(struct fastrpc_channel_ctx *cctx) | |
446 | { | |
447 | kref_put(&cctx->refcount, fastrpc_channel_ctx_free); | |
448 | } | |
449 | ||
c68cfb71 SK |
450 | static void fastrpc_context_free(struct kref *ref) |
451 | { | |
452 | struct fastrpc_invoke_ctx *ctx; | |
453 | struct fastrpc_channel_ctx *cctx; | |
977e6c8d | 454 | unsigned long flags; |
c68cfb71 SK |
455 | int i; |
456 | ||
457 | ctx = container_of(ref, struct fastrpc_invoke_ctx, refcount); | |
458 | cctx = ctx->cctx; | |
459 | ||
8f6c1d8c | 460 | for (i = 0; i < ctx->nbufs; i++) |
c68cfb71 SK |
461 | fastrpc_map_put(ctx->maps[i]); |
462 | ||
463 | if (ctx->buf) | |
464 | fastrpc_buf_free(ctx->buf); | |
465 | ||
977e6c8d | 466 | spin_lock_irqsave(&cctx->lock, flags); |
c68cfb71 | 467 | idr_remove(&cctx->ctx_idr, ctx->ctxid >> 4); |
977e6c8d | 468 | spin_unlock_irqrestore(&cctx->lock, flags); |
c68cfb71 SK |
469 | |
470 | kfree(ctx->maps); | |
25e8dfb8 | 471 | kfree(ctx->olaps); |
c68cfb71 | 472 | kfree(ctx); |
278d56f9 BA |
473 | |
474 | fastrpc_channel_ctx_put(cctx); | |
c68cfb71 SK |
475 | } |
476 | ||
477 | static void fastrpc_context_get(struct fastrpc_invoke_ctx *ctx) | |
478 | { | |
479 | kref_get(&ctx->refcount); | |
480 | } | |
481 | ||
482 | static void fastrpc_context_put(struct fastrpc_invoke_ctx *ctx) | |
483 | { | |
484 | kref_put(&ctx->refcount, fastrpc_context_free); | |
485 | } | |
486 | ||
8e7389c7 TE |
487 | static void fastrpc_context_put_wq(struct work_struct *work) |
488 | { | |
489 | struct fastrpc_invoke_ctx *ctx = | |
490 | container_of(work, struct fastrpc_invoke_ctx, put_work); | |
491 | ||
492 | fastrpc_context_put(ctx); | |
493 | } | |
494 | ||
25e8dfb8 SK |
495 | #define CMP(aa, bb) ((aa) == (bb) ? 0 : (aa) < (bb) ? -1 : 1) |
496 | static int olaps_cmp(const void *a, const void *b) | |
497 | { | |
498 | struct fastrpc_buf_overlap *pa = (struct fastrpc_buf_overlap *)a; | |
499 | struct fastrpc_buf_overlap *pb = (struct fastrpc_buf_overlap *)b; | |
500 | /* sort with lowest starting buffer first */ | |
501 | int st = CMP(pa->start, pb->start); | |
502 | /* sort with highest ending buffer first */ | |
503 | int ed = CMP(pb->end, pa->end); | |
504 | ||
505 | return st == 0 ? ed : st; | |
506 | } | |
507 | ||
508 | static void fastrpc_get_buff_overlaps(struct fastrpc_invoke_ctx *ctx) | |
509 | { | |
510 | u64 max_end = 0; | |
511 | int i; | |
512 | ||
513 | for (i = 0; i < ctx->nbufs; ++i) { | |
514 | ctx->olaps[i].start = ctx->args[i].ptr; | |
515 | ctx->olaps[i].end = ctx->olaps[i].start + ctx->args[i].length; | |
516 | ctx->olaps[i].raix = i; | |
517 | } | |
518 | ||
519 | sort(ctx->olaps, ctx->nbufs, sizeof(*ctx->olaps), olaps_cmp, NULL); | |
520 | ||
521 | for (i = 0; i < ctx->nbufs; ++i) { | |
522 | /* Falling inside previous range */ | |
523 | if (ctx->olaps[i].start < max_end) { | |
524 | ctx->olaps[i].mstart = max_end; | |
525 | ctx->olaps[i].mend = ctx->olaps[i].end; | |
526 | ctx->olaps[i].offset = max_end - ctx->olaps[i].start; | |
527 | ||
528 | if (ctx->olaps[i].end > max_end) { | |
529 | max_end = ctx->olaps[i].end; | |
530 | } else { | |
531 | ctx->olaps[i].mend = 0; | |
532 | ctx->olaps[i].mstart = 0; | |
533 | } | |
534 | ||
535 | } else { | |
536 | ctx->olaps[i].mend = ctx->olaps[i].end; | |
537 | ctx->olaps[i].mstart = ctx->olaps[i].start; | |
538 | ctx->olaps[i].offset = 0; | |
539 | max_end = ctx->olaps[i].end; | |
540 | } | |
541 | } | |
542 | } | |
543 | ||
c68cfb71 SK |
544 | static struct fastrpc_invoke_ctx *fastrpc_context_alloc( |
545 | struct fastrpc_user *user, u32 kernel, u32 sc, | |
546 | struct fastrpc_invoke_args *args) | |
547 | { | |
548 | struct fastrpc_channel_ctx *cctx = user->cctx; | |
549 | struct fastrpc_invoke_ctx *ctx = NULL; | |
977e6c8d | 550 | unsigned long flags; |
c68cfb71 SK |
551 | int ret; |
552 | ||
553 | ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); | |
554 | if (!ctx) | |
555 | return ERR_PTR(-ENOMEM); | |
556 | ||
557 | INIT_LIST_HEAD(&ctx->node); | |
558 | ctx->fl = user; | |
559 | ctx->nscalars = REMOTE_SCALARS_LENGTH(sc); | |
560 | ctx->nbufs = REMOTE_SCALARS_INBUFS(sc) + | |
561 | REMOTE_SCALARS_OUTBUFS(sc); | |
562 | ||
563 | if (ctx->nscalars) { | |
564 | ctx->maps = kcalloc(ctx->nscalars, | |
565 | sizeof(*ctx->maps), GFP_KERNEL); | |
566 | if (!ctx->maps) { | |
567 | kfree(ctx); | |
568 | return ERR_PTR(-ENOMEM); | |
569 | } | |
25e8dfb8 SK |
570 | ctx->olaps = kcalloc(ctx->nscalars, |
571 | sizeof(*ctx->olaps), GFP_KERNEL); | |
572 | if (!ctx->olaps) { | |
573 | kfree(ctx->maps); | |
574 | kfree(ctx); | |
575 | return ERR_PTR(-ENOMEM); | |
576 | } | |
c68cfb71 | 577 | ctx->args = args; |
25e8dfb8 | 578 | fastrpc_get_buff_overlaps(ctx); |
c68cfb71 SK |
579 | } |
580 | ||
278d56f9 BA |
581 | /* Released in fastrpc_context_put() */ |
582 | fastrpc_channel_ctx_get(cctx); | |
583 | ||
c68cfb71 SK |
584 | ctx->sc = sc; |
585 | ctx->retval = -1; | |
586 | ctx->pid = current->pid; | |
587 | ctx->tgid = user->tgid; | |
588 | ctx->cctx = cctx; | |
589 | init_completion(&ctx->work); | |
8e7389c7 | 590 | INIT_WORK(&ctx->put_work, fastrpc_context_put_wq); |
c68cfb71 SK |
591 | |
592 | spin_lock(&user->lock); | |
593 | list_add_tail(&ctx->node, &user->pending); | |
594 | spin_unlock(&user->lock); | |
595 | ||
977e6c8d | 596 | spin_lock_irqsave(&cctx->lock, flags); |
c68cfb71 SK |
597 | ret = idr_alloc_cyclic(&cctx->ctx_idr, ctx, 1, |
598 | FASTRPC_CTX_MAX, GFP_ATOMIC); | |
599 | if (ret < 0) { | |
977e6c8d | 600 | spin_unlock_irqrestore(&cctx->lock, flags); |
c68cfb71 SK |
601 | goto err_idr; |
602 | } | |
603 | ctx->ctxid = ret << 4; | |
977e6c8d | 604 | spin_unlock_irqrestore(&cctx->lock, flags); |
c68cfb71 SK |
605 | |
606 | kref_init(&ctx->refcount); | |
607 | ||
608 | return ctx; | |
609 | err_idr: | |
610 | spin_lock(&user->lock); | |
611 | list_del(&ctx->node); | |
612 | spin_unlock(&user->lock); | |
278d56f9 | 613 | fastrpc_channel_ctx_put(cctx); |
c68cfb71 | 614 | kfree(ctx->maps); |
25e8dfb8 | 615 | kfree(ctx->olaps); |
c68cfb71 SK |
616 | kfree(ctx); |
617 | ||
618 | return ERR_PTR(ret); | |
619 | } | |
620 | ||
6cffd795 SK |
621 | static struct sg_table * |
622 | fastrpc_map_dma_buf(struct dma_buf_attachment *attachment, | |
623 | enum dma_data_direction dir) | |
624 | { | |
625 | struct fastrpc_dma_buf_attachment *a = attachment->priv; | |
626 | struct sg_table *table; | |
b212658a | 627 | int ret; |
6cffd795 SK |
628 | |
629 | table = &a->sgt; | |
630 | ||
b212658a JM |
631 | ret = dma_map_sgtable(attachment->dev, table, dir, 0); |
632 | if (ret) | |
633 | table = ERR_PTR(ret); | |
6cffd795 SK |
634 | return table; |
635 | } | |
636 | ||
637 | static void fastrpc_unmap_dma_buf(struct dma_buf_attachment *attach, | |
638 | struct sg_table *table, | |
639 | enum dma_data_direction dir) | |
640 | { | |
7cd7edb8 | 641 | dma_unmap_sgtable(attach->dev, table, dir, 0); |
6cffd795 SK |
642 | } |
643 | ||
644 | static void fastrpc_release(struct dma_buf *dmabuf) | |
645 | { | |
646 | struct fastrpc_buf *buffer = dmabuf->priv; | |
647 | ||
648 | fastrpc_buf_free(buffer); | |
649 | } | |
650 | ||
651 | static int fastrpc_dma_buf_attach(struct dma_buf *dmabuf, | |
652 | struct dma_buf_attachment *attachment) | |
653 | { | |
654 | struct fastrpc_dma_buf_attachment *a; | |
655 | struct fastrpc_buf *buffer = dmabuf->priv; | |
656 | int ret; | |
657 | ||
658 | a = kzalloc(sizeof(*a), GFP_KERNEL); | |
659 | if (!a) | |
660 | return -ENOMEM; | |
661 | ||
662 | ret = dma_get_sgtable(buffer->dev, &a->sgt, buffer->virt, | |
663 | FASTRPC_PHYS(buffer->phys), buffer->size); | |
664 | if (ret < 0) { | |
665 | dev_err(buffer->dev, "failed to get scatterlist from DMA API\n"); | |
fc739a05 | 666 | kfree(a); |
6cffd795 SK |
667 | return -EINVAL; |
668 | } | |
669 | ||
670 | a->dev = attachment->dev; | |
671 | INIT_LIST_HEAD(&a->node); | |
672 | attachment->priv = a; | |
673 | ||
674 | mutex_lock(&buffer->lock); | |
675 | list_add(&a->node, &buffer->attachments); | |
676 | mutex_unlock(&buffer->lock); | |
677 | ||
678 | return 0; | |
679 | } | |
680 | ||
681 | static void fastrpc_dma_buf_detatch(struct dma_buf *dmabuf, | |
682 | struct dma_buf_attachment *attachment) | |
683 | { | |
684 | struct fastrpc_dma_buf_attachment *a = attachment->priv; | |
685 | struct fastrpc_buf *buffer = dmabuf->priv; | |
686 | ||
687 | mutex_lock(&buffer->lock); | |
688 | list_del(&a->node); | |
689 | mutex_unlock(&buffer->lock); | |
cf61860e | 690 | sg_free_table(&a->sgt); |
6cffd795 SK |
691 | kfree(a); |
692 | } | |
693 | ||
7938f421 | 694 | static int fastrpc_vmap(struct dma_buf *dmabuf, struct iosys_map *map) |
6cffd795 SK |
695 | { |
696 | struct fastrpc_buf *buf = dmabuf->priv; | |
697 | ||
7938f421 | 698 | iosys_map_set_vaddr(map, buf->virt); |
6619ccf1 TZ |
699 | |
700 | return 0; | |
6cffd795 SK |
701 | } |
702 | ||
703 | static int fastrpc_mmap(struct dma_buf *dmabuf, | |
704 | struct vm_area_struct *vma) | |
705 | { | |
706 | struct fastrpc_buf *buf = dmabuf->priv; | |
707 | size_t size = vma->vm_end - vma->vm_start; | |
708 | ||
709 | return dma_mmap_coherent(buf->dev, vma, buf->virt, | |
710 | FASTRPC_PHYS(buf->phys), size); | |
711 | } | |
712 | ||
713 | static const struct dma_buf_ops fastrpc_dma_buf_ops = { | |
714 | .attach = fastrpc_dma_buf_attach, | |
715 | .detach = fastrpc_dma_buf_detatch, | |
716 | .map_dma_buf = fastrpc_map_dma_buf, | |
717 | .unmap_dma_buf = fastrpc_unmap_dma_buf, | |
718 | .mmap = fastrpc_mmap, | |
6cffd795 SK |
719 | .vmap = fastrpc_vmap, |
720 | .release = fastrpc_release, | |
721 | }; | |
722 | ||
c68cfb71 | 723 | static int fastrpc_map_create(struct fastrpc_user *fl, int fd, |
e90d9119 | 724 | u64 len, u32 attr, struct fastrpc_map **ppmap) |
c68cfb71 SK |
725 | { |
726 | struct fastrpc_session_ctx *sess = fl->sctx; | |
727 | struct fastrpc_map *map = NULL; | |
728 | int err = 0; | |
729 | ||
730 | if (!fastrpc_map_find(fl, fd, ppmap)) | |
731 | return 0; | |
732 | ||
733 | map = kzalloc(sizeof(*map), GFP_KERNEL); | |
734 | if (!map) | |
735 | return -ENOMEM; | |
736 | ||
737 | INIT_LIST_HEAD(&map->node); | |
334f1a1c AV |
738 | kref_init(&map->refcount); |
739 | ||
c68cfb71 SK |
740 | map->fl = fl; |
741 | map->fd = fd; | |
742 | map->buf = dma_buf_get(fd); | |
682a6044 WY |
743 | if (IS_ERR(map->buf)) { |
744 | err = PTR_ERR(map->buf); | |
c68cfb71 SK |
745 | goto get_err; |
746 | } | |
747 | ||
748 | map->attach = dma_buf_attach(map->buf, sess->dev); | |
749 | if (IS_ERR(map->attach)) { | |
750 | dev_err(sess->dev, "Failed to attach dmabuf\n"); | |
751 | err = PTR_ERR(map->attach); | |
752 | goto attach_err; | |
753 | } | |
754 | ||
755 | map->table = dma_buf_map_attachment(map->attach, DMA_BIDIRECTIONAL); | |
756 | if (IS_ERR(map->table)) { | |
757 | err = PTR_ERR(map->table); | |
758 | goto map_err; | |
759 | } | |
760 | ||
761 | map->phys = sg_dma_address(map->table->sgl); | |
762 | map->phys += ((u64)fl->sctx->sid << 32); | |
763 | map->size = len; | |
764 | map->va = sg_virt(map->table->sgl); | |
765 | map->len = len; | |
c68cfb71 | 766 | |
e90d9119 VKG |
767 | if (attr & FASTRPC_ATTR_SECUREMAP) { |
768 | /* | |
769 | * If subsystem VMIDs are defined in DTSI, then do | |
770 | * hyp_assign from HLOS to those VM(s) | |
771 | */ | |
772 | unsigned int perms = BIT(QCOM_SCM_VMID_HLOS); | |
773 | ||
774 | map->attr = attr; | |
775 | err = qcom_scm_assign_mem(map->phys, (u64)map->size, &perms, | |
776 | fl->cctx->vmperms, fl->cctx->vmcount); | |
777 | if (err) { | |
778 | dev_err(sess->dev, "Failed to assign memory with phys 0x%llx size 0x%llx err %d", | |
779 | map->phys, map->size, err); | |
780 | goto map_err; | |
781 | } | |
782 | } | |
c68cfb71 SK |
783 | spin_lock(&fl->lock); |
784 | list_add_tail(&map->node, &fl->maps); | |
785 | spin_unlock(&fl->lock); | |
786 | *ppmap = map; | |
787 | ||
788 | return 0; | |
789 | ||
790 | map_err: | |
791 | dma_buf_detach(map->buf, map->attach); | |
792 | attach_err: | |
793 | dma_buf_put(map->buf); | |
794 | get_err: | |
334f1a1c | 795 | fastrpc_map_put(map); |
c68cfb71 SK |
796 | |
797 | return err; | |
798 | } | |
799 | ||
800 | /* | |
801 | * Fastrpc payload buffer with metadata looks like: | |
802 | * | |
803 | * >>>>>> START of METADATA <<<<<<<<< | |
804 | * +---------------------------------+ | |
805 | * | Arguments | | |
35a82b87 | 806 | * | type:(union fastrpc_remote_arg)| |
c68cfb71 SK |
807 | * | (0 - N) | |
808 | * +---------------------------------+ | |
809 | * | Invoke Buffer list | | |
810 | * | type:(struct fastrpc_invoke_buf)| | |
811 | * | (0 - N) | | |
812 | * +---------------------------------+ | |
813 | * | Page info list | | |
814 | * | type:(struct fastrpc_phy_page) | | |
815 | * | (0 - N) | | |
816 | * +---------------------------------+ | |
817 | * | Optional info | | |
818 | * |(can be specific to SoC/Firmware)| | |
819 | * +---------------------------------+ | |
820 | * >>>>>>>> END of METADATA <<<<<<<<< | |
821 | * +---------------------------------+ | |
822 | * | Inline ARGS | | |
823 | * | (0-N) | | |
824 | * +---------------------------------+ | |
825 | */ | |
826 | ||
827 | static int fastrpc_get_meta_size(struct fastrpc_invoke_ctx *ctx) | |
828 | { | |
829 | int size = 0; | |
830 | ||
35a82b87 | 831 | size = (sizeof(struct fastrpc_remote_buf) + |
c68cfb71 SK |
832 | sizeof(struct fastrpc_invoke_buf) + |
833 | sizeof(struct fastrpc_phy_page)) * ctx->nscalars + | |
834 | sizeof(u64) * FASTRPC_MAX_FDLIST + | |
835 | sizeof(u32) * FASTRPC_MAX_CRCLIST; | |
836 | ||
837 | return size; | |
838 | } | |
839 | ||
840 | static u64 fastrpc_get_payload_size(struct fastrpc_invoke_ctx *ctx, int metalen) | |
841 | { | |
842 | u64 size = 0; | |
3a1bf591 | 843 | int oix; |
c68cfb71 SK |
844 | |
845 | size = ALIGN(metalen, FASTRPC_ALIGN); | |
3a1bf591 J |
846 | for (oix = 0; oix < ctx->nbufs; oix++) { |
847 | int i = ctx->olaps[oix].raix; | |
848 | ||
c68cfb71 | 849 | if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1) { |
25e8dfb8 | 850 | |
3a1bf591 | 851 | if (ctx->olaps[oix].offset == 0) |
25e8dfb8 SK |
852 | size = ALIGN(size, FASTRPC_ALIGN); |
853 | ||
3a1bf591 | 854 | size += (ctx->olaps[oix].mend - ctx->olaps[oix].mstart); |
c68cfb71 SK |
855 | } |
856 | } | |
857 | ||
858 | return size; | |
859 | } | |
860 | ||
861 | static int fastrpc_create_maps(struct fastrpc_invoke_ctx *ctx) | |
862 | { | |
863 | struct device *dev = ctx->fl->sctx->dev; | |
864 | int i, err; | |
865 | ||
866 | for (i = 0; i < ctx->nscalars; ++i) { | |
c68cfb71 SK |
867 | |
868 | if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1 || | |
869 | ctx->args[i].length == 0) | |
870 | continue; | |
871 | ||
872 | err = fastrpc_map_create(ctx->fl, ctx->args[i].fd, | |
e90d9119 | 873 | ctx->args[i].length, ctx->args[i].attr, &ctx->maps[i]); |
c68cfb71 SK |
874 | if (err) { |
875 | dev_err(dev, "Error Creating map %d\n", err); | |
876 | return -EINVAL; | |
877 | } | |
878 | ||
879 | } | |
880 | return 0; | |
881 | } | |
882 | ||
54f7c85b VKG |
883 | static struct fastrpc_invoke_buf *fastrpc_invoke_buf_start(union fastrpc_remote_arg *pra, int len) |
884 | { | |
885 | return (struct fastrpc_invoke_buf *)(&pra[len]); | |
886 | } | |
887 | ||
888 | static struct fastrpc_phy_page *fastrpc_phy_page_start(struct fastrpc_invoke_buf *buf, int len) | |
889 | { | |
890 | return (struct fastrpc_phy_page *)(&buf[len]); | |
891 | } | |
892 | ||
c68cfb71 SK |
893 | static int fastrpc_get_args(u32 kernel, struct fastrpc_invoke_ctx *ctx) |
894 | { | |
895 | struct device *dev = ctx->fl->sctx->dev; | |
35a82b87 | 896 | union fastrpc_remote_arg *rpra; |
c68cfb71 SK |
897 | struct fastrpc_invoke_buf *list; |
898 | struct fastrpc_phy_page *pages; | |
25e8dfb8 SK |
899 | int inbufs, i, oix, err = 0; |
900 | u64 len, rlen, pkt_size; | |
02b45b47 | 901 | u64 pg_start, pg_end; |
c68cfb71 SK |
902 | uintptr_t args; |
903 | int metalen; | |
904 | ||
c68cfb71 SK |
905 | inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); |
906 | metalen = fastrpc_get_meta_size(ctx); | |
907 | pkt_size = fastrpc_get_payload_size(ctx, metalen); | |
908 | ||
909 | err = fastrpc_create_maps(ctx); | |
910 | if (err) | |
911 | return err; | |
912 | ||
913 | ctx->msg_sz = pkt_size; | |
914 | ||
915 | err = fastrpc_buf_alloc(ctx->fl, dev, pkt_size, &ctx->buf); | |
916 | if (err) | |
917 | return err; | |
918 | ||
919 | rpra = ctx->buf->virt; | |
54f7c85b VKG |
920 | list = fastrpc_invoke_buf_start(rpra, ctx->nscalars); |
921 | pages = fastrpc_phy_page_start(list, ctx->nscalars); | |
c68cfb71 SK |
922 | args = (uintptr_t)ctx->buf->virt + metalen; |
923 | rlen = pkt_size - metalen; | |
924 | ctx->rpra = rpra; | |
925 | ||
25e8dfb8 SK |
926 | for (oix = 0; oix < ctx->nbufs; ++oix) { |
927 | int mlen; | |
928 | ||
929 | i = ctx->olaps[oix].raix; | |
930 | len = ctx->args[i].length; | |
c68cfb71 | 931 | |
35a82b87 VKG |
932 | rpra[i].buf.pv = 0; |
933 | rpra[i].buf.len = len; | |
c68cfb71 SK |
934 | list[i].num = len ? 1 : 0; |
935 | list[i].pgidx = i; | |
936 | ||
937 | if (!len) | |
938 | continue; | |
939 | ||
c68cfb71 | 940 | if (ctx->maps[i]) { |
80f3afd7 SK |
941 | struct vm_area_struct *vma = NULL; |
942 | ||
35a82b87 | 943 | rpra[i].buf.pv = (u64) ctx->args[i].ptr; |
c68cfb71 | 944 | pages[i].addr = ctx->maps[i]->phys; |
80f3afd7 | 945 | |
f9a470db | 946 | mmap_read_lock(current->mm); |
80f3afd7 SK |
947 | vma = find_vma(current->mm, ctx->args[i].ptr); |
948 | if (vma) | |
949 | pages[i].addr += ctx->args[i].ptr - | |
950 | vma->vm_start; | |
f9a470db | 951 | mmap_read_unlock(current->mm); |
80f3afd7 | 952 | |
02b45b47 SK |
953 | pg_start = (ctx->args[i].ptr & PAGE_MASK) >> PAGE_SHIFT; |
954 | pg_end = ((ctx->args[i].ptr + len - 1) & PAGE_MASK) >> | |
955 | PAGE_SHIFT; | |
956 | pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; | |
957 | ||
c68cfb71 | 958 | } else { |
25e8dfb8 SK |
959 | |
960 | if (ctx->olaps[oix].offset == 0) { | |
961 | rlen -= ALIGN(args, FASTRPC_ALIGN) - args; | |
962 | args = ALIGN(args, FASTRPC_ALIGN); | |
963 | } | |
964 | ||
965 | mlen = ctx->olaps[oix].mend - ctx->olaps[oix].mstart; | |
966 | ||
967 | if (rlen < mlen) | |
c68cfb71 SK |
968 | goto bail; |
969 | ||
35a82b87 | 970 | rpra[i].buf.pv = args - ctx->olaps[oix].offset; |
25e8dfb8 SK |
971 | pages[i].addr = ctx->buf->phys - |
972 | ctx->olaps[oix].offset + | |
973 | (pkt_size - rlen); | |
c68cfb71 | 974 | pages[i].addr = pages[i].addr & PAGE_MASK; |
25e8dfb8 | 975 | |
02b45b47 SK |
976 | pg_start = (args & PAGE_MASK) >> PAGE_SHIFT; |
977 | pg_end = ((args + len - 1) & PAGE_MASK) >> PAGE_SHIFT; | |
978 | pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; | |
25e8dfb8 SK |
979 | args = args + mlen; |
980 | rlen -= mlen; | |
c68cfb71 SK |
981 | } |
982 | ||
983 | if (i < inbufs && !ctx->maps[i]) { | |
35a82b87 | 984 | void *dst = (void *)(uintptr_t)rpra[i].buf.pv; |
c68cfb71 SK |
985 | void *src = (void *)(uintptr_t)ctx->args[i].ptr; |
986 | ||
987 | if (!kernel) { | |
988 | if (copy_from_user(dst, (void __user *)src, | |
989 | len)) { | |
990 | err = -EFAULT; | |
991 | goto bail; | |
992 | } | |
993 | } else { | |
994 | memcpy(dst, src, len); | |
995 | } | |
996 | } | |
997 | } | |
998 | ||
999 | for (i = ctx->nbufs; i < ctx->nscalars; ++i) { | |
c68cfb71 SK |
1000 | list[i].num = ctx->args[i].length ? 1 : 0; |
1001 | list[i].pgidx = i; | |
35a82b87 VKG |
1002 | if (ctx->maps[i]) { |
1003 | pages[i].addr = ctx->maps[i]->phys; | |
1004 | pages[i].size = ctx->maps[i]->size; | |
1005 | } | |
1006 | rpra[i].dma.fd = ctx->args[i].fd; | |
1007 | rpra[i].dma.len = ctx->args[i].length; | |
1008 | rpra[i].dma.offset = (u64) ctx->args[i].ptr; | |
c68cfb71 SK |
1009 | } |
1010 | ||
1011 | bail: | |
1012 | if (err) | |
1013 | dev_err(dev, "Error: get invoke args failed:%d\n", err); | |
1014 | ||
1015 | return err; | |
1016 | } | |
1017 | ||
1018 | static int fastrpc_put_args(struct fastrpc_invoke_ctx *ctx, | |
1019 | u32 kernel) | |
1020 | { | |
35a82b87 | 1021 | union fastrpc_remote_arg *rpra = ctx->rpra; |
8f6c1d8c VKG |
1022 | struct fastrpc_user *fl = ctx->fl; |
1023 | struct fastrpc_map *mmap = NULL; | |
1024 | struct fastrpc_invoke_buf *list; | |
1025 | struct fastrpc_phy_page *pages; | |
1026 | u64 *fdlist; | |
1027 | int i, inbufs, outbufs, handles; | |
c68cfb71 SK |
1028 | |
1029 | inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); | |
8f6c1d8c VKG |
1030 | outbufs = REMOTE_SCALARS_OUTBUFS(ctx->sc); |
1031 | handles = REMOTE_SCALARS_INHANDLES(ctx->sc) + REMOTE_SCALARS_OUTHANDLES(ctx->sc); | |
1032 | list = fastrpc_invoke_buf_start(rpra, ctx->nscalars); | |
1033 | pages = fastrpc_phy_page_start(list, ctx->nscalars); | |
1034 | fdlist = (uint64_t *)(pages + inbufs + outbufs + handles); | |
c68cfb71 SK |
1035 | |
1036 | for (i = inbufs; i < ctx->nbufs; ++i) { | |
847afd7b | 1037 | if (!ctx->maps[i]) { |
35a82b87 | 1038 | void *src = (void *)(uintptr_t)rpra[i].buf.pv; |
847afd7b | 1039 | void *dst = (void *)(uintptr_t)ctx->args[i].ptr; |
35a82b87 | 1040 | u64 len = rpra[i].buf.len; |
c68cfb71 | 1041 | |
847afd7b J |
1042 | if (!kernel) { |
1043 | if (copy_to_user((void __user *)dst, src, len)) | |
1044 | return -EFAULT; | |
1045 | } else { | |
1046 | memcpy(dst, src, len); | |
1047 | } | |
c68cfb71 SK |
1048 | } |
1049 | } | |
1050 | ||
8f6c1d8c VKG |
1051 | for (i = 0; i < FASTRPC_MAX_FDLIST; i++) { |
1052 | if (!fdlist[i]) | |
1053 | break; | |
1054 | if (!fastrpc_map_lookup(fl, (int)fdlist[i], &mmap)) | |
1055 | fastrpc_map_put(mmap); | |
1056 | } | |
1057 | ||
c68cfb71 SK |
1058 | return 0; |
1059 | } | |
1060 | ||
1061 | static int fastrpc_invoke_send(struct fastrpc_session_ctx *sctx, | |
1062 | struct fastrpc_invoke_ctx *ctx, | |
1063 | u32 kernel, uint32_t handle) | |
1064 | { | |
1065 | struct fastrpc_channel_ctx *cctx; | |
1066 | struct fastrpc_user *fl = ctx->fl; | |
1067 | struct fastrpc_msg *msg = &ctx->msg; | |
74003385 | 1068 | int ret; |
c68cfb71 SK |
1069 | |
1070 | cctx = fl->cctx; | |
1071 | msg->pid = fl->tgid; | |
1072 | msg->tid = current->pid; | |
1073 | ||
1074 | if (kernel) | |
1075 | msg->pid = 0; | |
1076 | ||
1077 | msg->ctx = ctx->ctxid | fl->pd; | |
1078 | msg->handle = handle; | |
1079 | msg->sc = ctx->sc; | |
1080 | msg->addr = ctx->buf ? ctx->buf->phys : 0; | |
1081 | msg->size = roundup(ctx->msg_sz, PAGE_SIZE); | |
1082 | fastrpc_context_get(ctx); | |
1083 | ||
74003385 SK |
1084 | ret = rpmsg_send(cctx->rpdev->ept, (void *)msg, sizeof(*msg)); |
1085 | ||
1086 | if (ret) | |
1087 | fastrpc_context_put(ctx); | |
1088 | ||
1089 | return ret; | |
1090 | ||
c68cfb71 SK |
1091 | } |
1092 | ||
1093 | static int fastrpc_internal_invoke(struct fastrpc_user *fl, u32 kernel, | |
1094 | u32 handle, u32 sc, | |
1095 | struct fastrpc_invoke_args *args) | |
1096 | { | |
1097 | struct fastrpc_invoke_ctx *ctx = NULL; | |
1098 | int err = 0; | |
1099 | ||
1100 | if (!fl->sctx) | |
1101 | return -EINVAL; | |
1102 | ||
2e369878 BA |
1103 | if (!fl->cctx->rpdev) |
1104 | return -EPIPE; | |
1105 | ||
20c40794 DB |
1106 | if (handle == FASTRPC_INIT_HANDLE && !kernel) { |
1107 | dev_warn_ratelimited(fl->sctx->dev, "user app trying to send a kernel RPC message (%d)\n", handle); | |
1108 | return -EPERM; | |
1109 | } | |
1110 | ||
c68cfb71 SK |
1111 | ctx = fastrpc_context_alloc(fl, kernel, sc, args); |
1112 | if (IS_ERR(ctx)) | |
1113 | return PTR_ERR(ctx); | |
1114 | ||
1115 | if (ctx->nscalars) { | |
1116 | err = fastrpc_get_args(kernel, ctx); | |
1117 | if (err) | |
1118 | goto bail; | |
1119 | } | |
415a0729 SK |
1120 | |
1121 | /* make sure that all CPU memory writes are seen by DSP */ | |
1122 | dma_wmb(); | |
c68cfb71 SK |
1123 | /* Send invoke buffer to remote dsp */ |
1124 | err = fastrpc_invoke_send(fl->sctx, ctx, kernel, handle); | |
1125 | if (err) | |
1126 | goto bail; | |
1127 | ||
55bcda35 JRO |
1128 | if (kernel) { |
1129 | if (!wait_for_completion_timeout(&ctx->work, 10 * HZ)) | |
1130 | err = -ETIMEDOUT; | |
1131 | } else { | |
1132 | err = wait_for_completion_interruptible(&ctx->work); | |
1133 | } | |
1134 | ||
c68cfb71 SK |
1135 | if (err) |
1136 | goto bail; | |
1137 | ||
1138 | /* Check the response from remote dsp */ | |
1139 | err = ctx->retval; | |
1140 | if (err) | |
1141 | goto bail; | |
1142 | ||
1143 | if (ctx->nscalars) { | |
415a0729 SK |
1144 | /* make sure that all memory writes by DSP are seen by CPU */ |
1145 | dma_rmb(); | |
c68cfb71 SK |
1146 | /* populate all the output buffers with results */ |
1147 | err = fastrpc_put_args(ctx, kernel); | |
1148 | if (err) | |
1149 | goto bail; | |
1150 | } | |
1151 | ||
1152 | bail: | |
387f6255 JRO |
1153 | if (err != -ERESTARTSYS && err != -ETIMEDOUT) { |
1154 | /* We are done with this compute context */ | |
1155 | spin_lock(&fl->lock); | |
1156 | list_del(&ctx->node); | |
1157 | spin_unlock(&fl->lock); | |
1158 | fastrpc_context_put(ctx); | |
1159 | } | |
c68cfb71 SK |
1160 | if (err) |
1161 | dev_dbg(fl->sctx->dev, "Error: Invoke Failed %d\n", err); | |
1162 | ||
1163 | return err; | |
1164 | } | |
1165 | ||
7f1f4812 J |
1166 | static bool is_session_rejected(struct fastrpc_user *fl, bool unsigned_pd_request) |
1167 | { | |
1168 | /* Check if the device node is non-secure and channel is secure*/ | |
1169 | if (!fl->is_secure_dev && fl->cctx->secure) { | |
1170 | /* | |
1171 | * Allow untrusted applications to offload only to Unsigned PD when | |
1172 | * channel is configured as secure and block untrusted apps on channel | |
1173 | * that does not support unsigned PD offload | |
1174 | */ | |
1175 | if (!fl->cctx->unsigned_support || !unsigned_pd_request) { | |
1176 | dev_err(&fl->cctx->rpdev->dev, "Error: Untrusted application trying to offload to signed PD"); | |
1177 | return true; | |
1178 | } | |
1179 | } | |
1180 | ||
1181 | return false; | |
1182 | } | |
1183 | ||
d73f71c7 SK |
1184 | static int fastrpc_init_create_process(struct fastrpc_user *fl, |
1185 | char __user *argp) | |
1186 | { | |
1187 | struct fastrpc_init_create init; | |
1188 | struct fastrpc_invoke_args *args; | |
1189 | struct fastrpc_phy_page pages[1]; | |
1190 | struct fastrpc_map *map = NULL; | |
1191 | struct fastrpc_buf *imem = NULL; | |
1192 | int memlen; | |
1193 | int err; | |
1194 | struct { | |
1195 | int pgid; | |
1196 | u32 namelen; | |
1197 | u32 filelen; | |
1198 | u32 pageslen; | |
1199 | u32 attrs; | |
1200 | u32 siglen; | |
1201 | } inbuf; | |
1202 | u32 sc; | |
7f1f4812 | 1203 | bool unsigned_module = false; |
d73f71c7 SK |
1204 | |
1205 | args = kcalloc(FASTRPC_CREATE_PROCESS_NARGS, sizeof(*args), GFP_KERNEL); | |
1206 | if (!args) | |
1207 | return -ENOMEM; | |
1208 | ||
1209 | if (copy_from_user(&init, argp, sizeof(init))) { | |
1210 | err = -EFAULT; | |
b49f6d83 | 1211 | goto err; |
d73f71c7 SK |
1212 | } |
1213 | ||
7f1f4812 J |
1214 | if (init.attrs & FASTRPC_MODE_UNSIGNED_MODULE) |
1215 | unsigned_module = true; | |
1216 | ||
1217 | if (is_session_rejected(fl, unsigned_module)) { | |
1218 | err = -ECONNREFUSED; | |
1219 | goto err; | |
1220 | } | |
1221 | ||
d73f71c7 SK |
1222 | if (init.filelen > INIT_FILELEN_MAX) { |
1223 | err = -EINVAL; | |
b49f6d83 | 1224 | goto err; |
d73f71c7 SK |
1225 | } |
1226 | ||
1227 | inbuf.pgid = fl->tgid; | |
1228 | inbuf.namelen = strlen(current->comm) + 1; | |
1229 | inbuf.filelen = init.filelen; | |
1230 | inbuf.pageslen = 1; | |
1231 | inbuf.attrs = init.attrs; | |
1232 | inbuf.siglen = init.siglen; | |
84195d20 | 1233 | fl->pd = USER_PD; |
d73f71c7 SK |
1234 | |
1235 | if (init.filelen && init.filefd) { | |
e90d9119 | 1236 | err = fastrpc_map_create(fl, init.filefd, init.filelen, 0, &map); |
d73f71c7 | 1237 | if (err) |
b49f6d83 | 1238 | goto err; |
d73f71c7 SK |
1239 | } |
1240 | ||
1241 | memlen = ALIGN(max(INIT_FILELEN_MAX, (int)init.filelen * 4), | |
1242 | 1024 * 1024); | |
1243 | err = fastrpc_buf_alloc(fl, fl->sctx->dev, memlen, | |
1244 | &imem); | |
b49f6d83 TE |
1245 | if (err) |
1246 | goto err_alloc; | |
d73f71c7 SK |
1247 | |
1248 | fl->init_mem = imem; | |
1249 | args[0].ptr = (u64)(uintptr_t)&inbuf; | |
1250 | args[0].length = sizeof(inbuf); | |
1251 | args[0].fd = -1; | |
1252 | ||
1253 | args[1].ptr = (u64)(uintptr_t)current->comm; | |
1254 | args[1].length = inbuf.namelen; | |
1255 | args[1].fd = -1; | |
1256 | ||
1257 | args[2].ptr = (u64) init.file; | |
1258 | args[2].length = inbuf.filelen; | |
1259 | args[2].fd = init.filefd; | |
1260 | ||
1261 | pages[0].addr = imem->phys; | |
1262 | pages[0].size = imem->size; | |
1263 | ||
1264 | args[3].ptr = (u64)(uintptr_t) pages; | |
1265 | args[3].length = 1 * sizeof(*pages); | |
1266 | args[3].fd = -1; | |
1267 | ||
1268 | args[4].ptr = (u64)(uintptr_t)&inbuf.attrs; | |
1269 | args[4].length = sizeof(inbuf.attrs); | |
1270 | args[4].fd = -1; | |
1271 | ||
1272 | args[5].ptr = (u64)(uintptr_t) &inbuf.siglen; | |
1273 | args[5].length = sizeof(inbuf.siglen); | |
1274 | args[5].fd = -1; | |
1275 | ||
1276 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE, 4, 0); | |
1277 | if (init.attrs) | |
1278 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE_ATTR, 6, 0); | |
1279 | ||
1280 | err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, | |
1281 | sc, args); | |
b49f6d83 TE |
1282 | if (err) |
1283 | goto err_invoke; | |
1284 | ||
1285 | kfree(args); | |
d73f71c7 | 1286 | |
b49f6d83 TE |
1287 | return 0; |
1288 | ||
1289 | err_invoke: | |
1290 | fl->init_mem = NULL; | |
1291 | fastrpc_buf_free(imem); | |
1292 | err_alloc: | |
1293 | if (map) { | |
1294 | spin_lock(&fl->lock); | |
1295 | list_del(&map->node); | |
1296 | spin_unlock(&fl->lock); | |
d73f71c7 | 1297 | fastrpc_map_put(map); |
d73f71c7 | 1298 | } |
b49f6d83 | 1299 | err: |
d73f71c7 SK |
1300 | kfree(args); |
1301 | ||
1302 | return err; | |
1303 | } | |
1304 | ||
f6f9279f SK |
1305 | static struct fastrpc_session_ctx *fastrpc_session_alloc( |
1306 | struct fastrpc_channel_ctx *cctx) | |
1307 | { | |
1308 | struct fastrpc_session_ctx *session = NULL; | |
977e6c8d | 1309 | unsigned long flags; |
f6f9279f SK |
1310 | int i; |
1311 | ||
977e6c8d | 1312 | spin_lock_irqsave(&cctx->lock, flags); |
f6f9279f SK |
1313 | for (i = 0; i < cctx->sesscount; i++) { |
1314 | if (!cctx->session[i].used && cctx->session[i].valid) { | |
1315 | cctx->session[i].used = true; | |
1316 | session = &cctx->session[i]; | |
1317 | break; | |
1318 | } | |
1319 | } | |
977e6c8d | 1320 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f SK |
1321 | |
1322 | return session; | |
1323 | } | |
1324 | ||
1325 | static void fastrpc_session_free(struct fastrpc_channel_ctx *cctx, | |
1326 | struct fastrpc_session_ctx *session) | |
1327 | { | |
977e6c8d SK |
1328 | unsigned long flags; |
1329 | ||
1330 | spin_lock_irqsave(&cctx->lock, flags); | |
f6f9279f | 1331 | session->used = false; |
977e6c8d | 1332 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f SK |
1333 | } |
1334 | ||
d73f71c7 SK |
1335 | static int fastrpc_release_current_dsp_process(struct fastrpc_user *fl) |
1336 | { | |
1337 | struct fastrpc_invoke_args args[1]; | |
1338 | int tgid = 0; | |
1339 | u32 sc; | |
1340 | ||
1341 | tgid = fl->tgid; | |
1342 | args[0].ptr = (u64)(uintptr_t) &tgid; | |
1343 | args[0].length = sizeof(tgid); | |
1344 | args[0].fd = -1; | |
d73f71c7 SK |
1345 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_RELEASE, 1, 0); |
1346 | ||
1347 | return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, | |
1348 | sc, &args[0]); | |
1349 | } | |
1350 | ||
f6f9279f SK |
1351 | static int fastrpc_device_release(struct inode *inode, struct file *file) |
1352 | { | |
1353 | struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; | |
1354 | struct fastrpc_channel_ctx *cctx = fl->cctx; | |
c68cfb71 SK |
1355 | struct fastrpc_invoke_ctx *ctx, *n; |
1356 | struct fastrpc_map *map, *m; | |
2419e55e | 1357 | struct fastrpc_buf *buf, *b; |
977e6c8d | 1358 | unsigned long flags; |
f6f9279f | 1359 | |
d73f71c7 SK |
1360 | fastrpc_release_current_dsp_process(fl); |
1361 | ||
977e6c8d | 1362 | spin_lock_irqsave(&cctx->lock, flags); |
f6f9279f | 1363 | list_del(&fl->user); |
977e6c8d | 1364 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f | 1365 | |
c68cfb71 SK |
1366 | if (fl->init_mem) |
1367 | fastrpc_buf_free(fl->init_mem); | |
1368 | ||
1369 | list_for_each_entry_safe(ctx, n, &fl->pending, node) { | |
1370 | list_del(&ctx->node); | |
1371 | fastrpc_context_put(ctx); | |
1372 | } | |
1373 | ||
1374 | list_for_each_entry_safe(map, m, &fl->maps, node) { | |
1375 | list_del(&map->node); | |
1376 | fastrpc_map_put(map); | |
1377 | } | |
1378 | ||
2419e55e JRO |
1379 | list_for_each_entry_safe(buf, b, &fl->mmaps, node) { |
1380 | list_del(&buf->node); | |
1381 | fastrpc_buf_free(buf); | |
1382 | } | |
1383 | ||
f6f9279f | 1384 | fastrpc_session_free(cctx, fl->sctx); |
278d56f9 | 1385 | fastrpc_channel_ctx_put(cctx); |
f6f9279f SK |
1386 | |
1387 | mutex_destroy(&fl->mutex); | |
1388 | kfree(fl); | |
1389 | file->private_data = NULL; | |
1390 | ||
1391 | return 0; | |
1392 | } | |
1393 | ||
1394 | static int fastrpc_device_open(struct inode *inode, struct file *filp) | |
1395 | { | |
965602ea SK |
1396 | struct fastrpc_channel_ctx *cctx; |
1397 | struct fastrpc_device *fdevice; | |
f6f9279f | 1398 | struct fastrpc_user *fl = NULL; |
977e6c8d | 1399 | unsigned long flags; |
f6f9279f | 1400 | |
965602ea SK |
1401 | fdevice = miscdev_to_fdevice(filp->private_data); |
1402 | cctx = fdevice->cctx; | |
1403 | ||
f6f9279f SK |
1404 | fl = kzalloc(sizeof(*fl), GFP_KERNEL); |
1405 | if (!fl) | |
1406 | return -ENOMEM; | |
1407 | ||
278d56f9 BA |
1408 | /* Released in fastrpc_device_release() */ |
1409 | fastrpc_channel_ctx_get(cctx); | |
1410 | ||
f6f9279f SK |
1411 | filp->private_data = fl; |
1412 | spin_lock_init(&fl->lock); | |
1413 | mutex_init(&fl->mutex); | |
1414 | INIT_LIST_HEAD(&fl->pending); | |
1415 | INIT_LIST_HEAD(&fl->maps); | |
2419e55e | 1416 | INIT_LIST_HEAD(&fl->mmaps); |
f6f9279f SK |
1417 | INIT_LIST_HEAD(&fl->user); |
1418 | fl->tgid = current->tgid; | |
1419 | fl->cctx = cctx; | |
7f1f4812 | 1420 | fl->is_secure_dev = fdevice->secure; |
7c11df42 TE |
1421 | |
1422 | fl->sctx = fastrpc_session_alloc(cctx); | |
1423 | if (!fl->sctx) { | |
1424 | dev_err(&cctx->rpdev->dev, "No session available\n"); | |
1425 | mutex_destroy(&fl->mutex); | |
1426 | kfree(fl); | |
1427 | ||
1428 | return -EBUSY; | |
1429 | } | |
1430 | ||
977e6c8d | 1431 | spin_lock_irqsave(&cctx->lock, flags); |
f6f9279f | 1432 | list_add_tail(&fl->user, &cctx->users); |
977e6c8d | 1433 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f SK |
1434 | |
1435 | return 0; | |
1436 | } | |
1437 | ||
6cffd795 SK |
1438 | static int fastrpc_dmabuf_alloc(struct fastrpc_user *fl, char __user *argp) |
1439 | { | |
1440 | struct fastrpc_alloc_dma_buf bp; | |
1441 | DEFINE_DMA_BUF_EXPORT_INFO(exp_info); | |
1442 | struct fastrpc_buf *buf = NULL; | |
1443 | int err; | |
1444 | ||
1445 | if (copy_from_user(&bp, argp, sizeof(bp))) | |
1446 | return -EFAULT; | |
1447 | ||
1448 | err = fastrpc_buf_alloc(fl, fl->sctx->dev, bp.size, &buf); | |
1449 | if (err) | |
1450 | return err; | |
1451 | exp_info.ops = &fastrpc_dma_buf_ops; | |
1452 | exp_info.size = bp.size; | |
1453 | exp_info.flags = O_RDWR; | |
1454 | exp_info.priv = buf; | |
1455 | buf->dmabuf = dma_buf_export(&exp_info); | |
1456 | if (IS_ERR(buf->dmabuf)) { | |
1457 | err = PTR_ERR(buf->dmabuf); | |
1458 | fastrpc_buf_free(buf); | |
1459 | return err; | |
1460 | } | |
1461 | ||
1462 | bp.fd = dma_buf_fd(buf->dmabuf, O_ACCMODE); | |
1463 | if (bp.fd < 0) { | |
1464 | dma_buf_put(buf->dmabuf); | |
1465 | return -EINVAL; | |
1466 | } | |
1467 | ||
1468 | if (copy_to_user(argp, &bp, sizeof(bp))) { | |
46963e2e MK |
1469 | /* |
1470 | * The usercopy failed, but we can't do much about it, as | |
1471 | * dma_buf_fd() already called fd_install() and made the | |
1472 | * file descriptor accessible for the current process. It | |
1473 | * might already be closed and dmabuf no longer valid when | |
1474 | * we reach this point. Therefore "leak" the fd and rely on | |
1475 | * the process exit path to do any required cleanup. | |
1476 | */ | |
6cffd795 SK |
1477 | return -EFAULT; |
1478 | } | |
1479 | ||
6cffd795 SK |
1480 | return 0; |
1481 | } | |
1482 | ||
6010d9be | 1483 | static int fastrpc_init_attach(struct fastrpc_user *fl, int pd) |
d73f71c7 SK |
1484 | { |
1485 | struct fastrpc_invoke_args args[1]; | |
1486 | int tgid = fl->tgid; | |
1487 | u32 sc; | |
1488 | ||
1489 | args[0].ptr = (u64)(uintptr_t) &tgid; | |
1490 | args[0].length = sizeof(tgid); | |
1491 | args[0].fd = -1; | |
d73f71c7 | 1492 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_ATTACH, 1, 0); |
6010d9be | 1493 | fl->pd = pd; |
d73f71c7 SK |
1494 | |
1495 | return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, | |
1496 | sc, &args[0]); | |
1497 | } | |
1498 | ||
c68cfb71 SK |
1499 | static int fastrpc_invoke(struct fastrpc_user *fl, char __user *argp) |
1500 | { | |
1501 | struct fastrpc_invoke_args *args = NULL; | |
1502 | struct fastrpc_invoke inv; | |
1503 | u32 nscalars; | |
1504 | int err; | |
1505 | ||
1506 | if (copy_from_user(&inv, argp, sizeof(inv))) | |
1507 | return -EFAULT; | |
1508 | ||
1509 | /* nscalars is truncated here to max supported value */ | |
1510 | nscalars = REMOTE_SCALARS_LENGTH(inv.sc); | |
1511 | if (nscalars) { | |
1512 | args = kcalloc(nscalars, sizeof(*args), GFP_KERNEL); | |
1513 | if (!args) | |
1514 | return -ENOMEM; | |
1515 | ||
1516 | if (copy_from_user(args, (void __user *)(uintptr_t)inv.args, | |
1517 | nscalars * sizeof(*args))) { | |
1518 | kfree(args); | |
1519 | return -EFAULT; | |
1520 | } | |
1521 | } | |
1522 | ||
1523 | err = fastrpc_internal_invoke(fl, false, inv.handle, inv.sc, args); | |
1524 | kfree(args); | |
1525 | ||
1526 | return err; | |
1527 | } | |
1528 | ||
6c16fd8b J |
1529 | static int fastrpc_get_info_from_dsp(struct fastrpc_user *fl, uint32_t *dsp_attr_buf, |
1530 | uint32_t dsp_attr_buf_len) | |
1531 | { | |
1532 | struct fastrpc_invoke_args args[2] = { 0 }; | |
1533 | ||
1534 | /* Capability filled in userspace */ | |
1535 | dsp_attr_buf[0] = 0; | |
1536 | ||
1537 | args[0].ptr = (u64)(uintptr_t)&dsp_attr_buf_len; | |
1538 | args[0].length = sizeof(dsp_attr_buf_len); | |
1539 | args[0].fd = -1; | |
1540 | args[1].ptr = (u64)(uintptr_t)&dsp_attr_buf[1]; | |
1541 | args[1].length = dsp_attr_buf_len; | |
1542 | args[1].fd = -1; | |
f667f56b | 1543 | fl->pd = USER_PD; |
6c16fd8b J |
1544 | |
1545 | return fastrpc_internal_invoke(fl, true, FASTRPC_DSP_UTILITIES_HANDLE, | |
1546 | FASTRPC_SCALARS(0, 1, 1), args); | |
1547 | } | |
1548 | ||
1549 | static int fastrpc_get_info_from_kernel(struct fastrpc_ioctl_capability *cap, | |
1550 | struct fastrpc_user *fl) | |
1551 | { | |
1552 | struct fastrpc_channel_ctx *cctx = fl->cctx; | |
1553 | uint32_t attribute_id = cap->attribute_id; | |
1554 | uint32_t *dsp_attributes; | |
1555 | unsigned long flags; | |
1556 | uint32_t domain = cap->domain; | |
1557 | int err; | |
1558 | ||
1559 | spin_lock_irqsave(&cctx->lock, flags); | |
1560 | /* check if we already have queried dsp for attributes */ | |
1561 | if (cctx->valid_attributes) { | |
1562 | spin_unlock_irqrestore(&cctx->lock, flags); | |
1563 | goto done; | |
1564 | } | |
1565 | spin_unlock_irqrestore(&cctx->lock, flags); | |
1566 | ||
1567 | dsp_attributes = kzalloc(FASTRPC_MAX_DSP_ATTRIBUTES_LEN, GFP_KERNEL); | |
1568 | if (!dsp_attributes) | |
1569 | return -ENOMEM; | |
1570 | ||
1571 | err = fastrpc_get_info_from_dsp(fl, dsp_attributes, FASTRPC_MAX_DSP_ATTRIBUTES_LEN); | |
1572 | if (err == DSP_UNSUPPORTED_API) { | |
1573 | dev_info(&cctx->rpdev->dev, | |
1574 | "Warning: DSP capabilities not supported on domain: %d\n", domain); | |
1575 | kfree(dsp_attributes); | |
1576 | return -EOPNOTSUPP; | |
1577 | } else if (err) { | |
1578 | dev_err(&cctx->rpdev->dev, "Error: dsp information is incorrect err: %d\n", err); | |
1579 | kfree(dsp_attributes); | |
1580 | return err; | |
1581 | } | |
1582 | ||
1583 | spin_lock_irqsave(&cctx->lock, flags); | |
1584 | memcpy(cctx->dsp_attributes, dsp_attributes, FASTRPC_MAX_DSP_ATTRIBUTES_LEN); | |
1585 | cctx->valid_attributes = true; | |
1586 | spin_unlock_irqrestore(&cctx->lock, flags); | |
1587 | kfree(dsp_attributes); | |
1588 | done: | |
1589 | cap->capability = cctx->dsp_attributes[attribute_id]; | |
1590 | return 0; | |
1591 | } | |
1592 | ||
1593 | static int fastrpc_get_dsp_info(struct fastrpc_user *fl, char __user *argp) | |
1594 | { | |
1595 | struct fastrpc_ioctl_capability cap = {0}; | |
1596 | int err = 0; | |
1597 | ||
1598 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
1599 | return -EFAULT; | |
1600 | ||
1601 | cap.capability = 0; | |
1602 | if (cap.domain >= FASTRPC_DEV_MAX) { | |
1603 | dev_err(&fl->cctx->rpdev->dev, "Error: Invalid domain id:%d, err:%d\n", | |
1604 | cap.domain, err); | |
1605 | return -ECHRNG; | |
1606 | } | |
1607 | ||
1608 | /* Fastrpc Capablities does not support modem domain */ | |
1609 | if (cap.domain == MDSP_DOMAIN_ID) { | |
1610 | dev_err(&fl->cctx->rpdev->dev, "Error: modem not supported %d\n", err); | |
1611 | return -ECHRNG; | |
1612 | } | |
1613 | ||
1614 | if (cap.attribute_id >= FASTRPC_MAX_DSP_ATTRIBUTES) { | |
1615 | dev_err(&fl->cctx->rpdev->dev, "Error: invalid attribute: %d, err: %d\n", | |
1616 | cap.attribute_id, err); | |
1617 | return -EOVERFLOW; | |
1618 | } | |
1619 | ||
1620 | err = fastrpc_get_info_from_kernel(&cap, fl); | |
1621 | if (err) | |
1622 | return err; | |
1623 | ||
1624 | if (copy_to_user(argp, &cap.capability, sizeof(cap.capability))) | |
1625 | return -EFAULT; | |
1626 | ||
1627 | return 0; | |
1628 | } | |
1629 | ||
72fa6f78 | 1630 | static int fastrpc_req_munmap_impl(struct fastrpc_user *fl, struct fastrpc_buf *buf) |
2419e55e JRO |
1631 | { |
1632 | struct fastrpc_invoke_args args[1] = { [0] = { 0 } }; | |
2419e55e JRO |
1633 | struct fastrpc_munmap_req_msg req_msg; |
1634 | struct device *dev = fl->sctx->dev; | |
1635 | int err; | |
1636 | u32 sc; | |
1637 | ||
2419e55e JRO |
1638 | req_msg.pgid = fl->tgid; |
1639 | req_msg.size = buf->size; | |
1640 | req_msg.vaddr = buf->raddr; | |
1641 | ||
1642 | args[0].ptr = (u64) (uintptr_t) &req_msg; | |
1643 | args[0].length = sizeof(req_msg); | |
1644 | ||
1645 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MUNMAP, 1, 0); | |
1646 | err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, | |
1647 | &args[0]); | |
1648 | if (!err) { | |
1649 | dev_dbg(dev, "unmmap\tpt 0x%09lx OK\n", buf->raddr); | |
1650 | spin_lock(&fl->lock); | |
1651 | list_del(&buf->node); | |
1652 | spin_unlock(&fl->lock); | |
1653 | fastrpc_buf_free(buf); | |
1654 | } else { | |
1655 | dev_err(dev, "unmmap\tpt 0x%09lx ERROR\n", buf->raddr); | |
1656 | } | |
1657 | ||
1658 | return err; | |
1659 | } | |
1660 | ||
1661 | static int fastrpc_req_munmap(struct fastrpc_user *fl, char __user *argp) | |
1662 | { | |
72fa6f78 | 1663 | struct fastrpc_buf *buf = NULL, *iter, *b; |
2419e55e | 1664 | struct fastrpc_req_munmap req; |
72fa6f78 | 1665 | struct device *dev = fl->sctx->dev; |
2419e55e JRO |
1666 | |
1667 | if (copy_from_user(&req, argp, sizeof(req))) | |
1668 | return -EFAULT; | |
1669 | ||
72fa6f78 AV |
1670 | spin_lock(&fl->lock); |
1671 | list_for_each_entry_safe(iter, b, &fl->mmaps, node) { | |
1672 | if ((iter->raddr == req.vaddrout) && (iter->size == req.size)) { | |
1673 | buf = iter; | |
1674 | break; | |
1675 | } | |
1676 | } | |
1677 | spin_unlock(&fl->lock); | |
1678 | ||
1679 | if (!buf) { | |
1680 | dev_err(dev, "mmap\t\tpt 0x%09llx [len 0x%08llx] not in list\n", | |
1681 | req.vaddrout, req.size); | |
1682 | return -EINVAL; | |
1683 | } | |
1684 | ||
1685 | return fastrpc_req_munmap_impl(fl, buf); | |
2419e55e JRO |
1686 | } |
1687 | ||
1688 | static int fastrpc_req_mmap(struct fastrpc_user *fl, char __user *argp) | |
1689 | { | |
1690 | struct fastrpc_invoke_args args[3] = { [0 ... 2] = { 0 } }; | |
1691 | struct fastrpc_buf *buf = NULL; | |
1692 | struct fastrpc_mmap_req_msg req_msg; | |
1693 | struct fastrpc_mmap_rsp_msg rsp_msg; | |
2419e55e JRO |
1694 | struct fastrpc_phy_page pages; |
1695 | struct fastrpc_req_mmap req; | |
1696 | struct device *dev = fl->sctx->dev; | |
1697 | int err; | |
1698 | u32 sc; | |
1699 | ||
1700 | if (copy_from_user(&req, argp, sizeof(req))) | |
1701 | return -EFAULT; | |
1702 | ||
1703 | if (req.flags != ADSP_MMAP_ADD_PAGES) { | |
1704 | dev_err(dev, "flag not supported 0x%x\n", req.flags); | |
1705 | return -EINVAL; | |
1706 | } | |
1707 | ||
1708 | if (req.vaddrin) { | |
1709 | dev_err(dev, "adding user allocated pages is not supported\n"); | |
1710 | return -EINVAL; | |
1711 | } | |
1712 | ||
1713 | err = fastrpc_buf_alloc(fl, fl->sctx->dev, req.size, &buf); | |
1714 | if (err) { | |
1715 | dev_err(dev, "failed to allocate buffer\n"); | |
1716 | return err; | |
1717 | } | |
1718 | ||
1719 | req_msg.pgid = fl->tgid; | |
1720 | req_msg.flags = req.flags; | |
1721 | req_msg.vaddr = req.vaddrin; | |
1722 | req_msg.num = sizeof(pages); | |
1723 | ||
1724 | args[0].ptr = (u64) (uintptr_t) &req_msg; | |
1725 | args[0].length = sizeof(req_msg); | |
1726 | ||
1727 | pages.addr = buf->phys; | |
1728 | pages.size = buf->size; | |
1729 | ||
1730 | args[1].ptr = (u64) (uintptr_t) &pages; | |
1731 | args[1].length = sizeof(pages); | |
1732 | ||
1733 | args[2].ptr = (u64) (uintptr_t) &rsp_msg; | |
1734 | args[2].length = sizeof(rsp_msg); | |
1735 | ||
1736 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MMAP, 2, 1); | |
1737 | err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, | |
1738 | &args[0]); | |
1739 | if (err) { | |
1740 | dev_err(dev, "mmap error (len 0x%08llx)\n", buf->size); | |
1741 | goto err_invoke; | |
1742 | } | |
1743 | ||
1744 | /* update the buffer to be able to deallocate the memory on the DSP */ | |
1745 | buf->raddr = (uintptr_t) rsp_msg.vaddr; | |
1746 | ||
1747 | /* let the client know the address to use */ | |
1748 | req.vaddrout = rsp_msg.vaddr; | |
1749 | ||
1750 | spin_lock(&fl->lock); | |
1751 | list_add_tail(&buf->node, &fl->mmaps); | |
1752 | spin_unlock(&fl->lock); | |
1753 | ||
1754 | if (copy_to_user((void __user *)argp, &req, sizeof(req))) { | |
72fa6f78 AV |
1755 | err = -EFAULT; |
1756 | goto err_assign; | |
2419e55e JRO |
1757 | } |
1758 | ||
1759 | dev_dbg(dev, "mmap\t\tpt 0x%09lx OK [len 0x%08llx]\n", | |
1760 | buf->raddr, buf->size); | |
1761 | ||
1762 | return 0; | |
1763 | ||
72fa6f78 AV |
1764 | err_assign: |
1765 | fastrpc_req_munmap_impl(fl, buf); | |
2419e55e JRO |
1766 | err_invoke: |
1767 | fastrpc_buf_free(buf); | |
1768 | ||
1769 | return err; | |
1770 | } | |
1771 | ||
5c1b97c7 J |
1772 | static int fastrpc_req_mem_unmap_impl(struct fastrpc_user *fl, struct fastrpc_mem_unmap *req) |
1773 | { | |
1774 | struct fastrpc_invoke_args args[1] = { [0] = { 0 } }; | |
c5c07c59 | 1775 | struct fastrpc_map *map = NULL, *iter, *m; |
5c1b97c7 J |
1776 | struct fastrpc_mem_unmap_req_msg req_msg = { 0 }; |
1777 | int err = 0; | |
1778 | u32 sc; | |
1779 | struct device *dev = fl->sctx->dev; | |
1780 | ||
1781 | spin_lock(&fl->lock); | |
c5c07c59 SK |
1782 | list_for_each_entry_safe(iter, m, &fl->maps, node) { |
1783 | if ((req->fd < 0 || iter->fd == req->fd) && (iter->raddr == req->vaddr)) { | |
1784 | map = iter; | |
5c1b97c7 | 1785 | break; |
c5c07c59 | 1786 | } |
5c1b97c7 J |
1787 | } |
1788 | ||
1789 | spin_unlock(&fl->lock); | |
1790 | ||
1791 | if (!map) { | |
1792 | dev_err(dev, "map not in list\n"); | |
1793 | return -EINVAL; | |
1794 | } | |
1795 | ||
1796 | req_msg.pgid = fl->tgid; | |
1797 | req_msg.len = map->len; | |
1798 | req_msg.vaddrin = map->raddr; | |
1799 | req_msg.fd = map->fd; | |
1800 | ||
1801 | args[0].ptr = (u64) (uintptr_t) &req_msg; | |
1802 | args[0].length = sizeof(req_msg); | |
1803 | ||
1804 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MEM_UNMAP, 1, 0); | |
1805 | err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, | |
1806 | &args[0]); | |
1807 | fastrpc_map_put(map); | |
1808 | if (err) | |
1809 | dev_err(dev, "unmmap\tpt fd = %d, 0x%09llx error\n", map->fd, map->raddr); | |
1810 | ||
1811 | return err; | |
1812 | } | |
1813 | ||
1814 | static int fastrpc_req_mem_unmap(struct fastrpc_user *fl, char __user *argp) | |
1815 | { | |
1816 | struct fastrpc_mem_unmap req; | |
1817 | ||
1818 | if (copy_from_user(&req, argp, sizeof(req))) | |
1819 | return -EFAULT; | |
1820 | ||
1821 | return fastrpc_req_mem_unmap_impl(fl, &req); | |
1822 | } | |
1823 | ||
1824 | static int fastrpc_req_mem_map(struct fastrpc_user *fl, char __user *argp) | |
1825 | { | |
1826 | struct fastrpc_invoke_args args[4] = { [0 ... 3] = { 0 } }; | |
1827 | struct fastrpc_mem_map_req_msg req_msg = { 0 }; | |
1828 | struct fastrpc_mmap_rsp_msg rsp_msg = { 0 }; | |
1829 | struct fastrpc_mem_unmap req_unmap = { 0 }; | |
1830 | struct fastrpc_phy_page pages = { 0 }; | |
1831 | struct fastrpc_mem_map req; | |
1832 | struct device *dev = fl->sctx->dev; | |
1833 | struct fastrpc_map *map = NULL; | |
1834 | int err; | |
1835 | u32 sc; | |
1836 | ||
1837 | if (copy_from_user(&req, argp, sizeof(req))) | |
1838 | return -EFAULT; | |
1839 | ||
1840 | /* create SMMU mapping */ | |
3abe3ab3 | 1841 | err = fastrpc_map_create(fl, req.fd, req.length, 0, &map); |
5c1b97c7 J |
1842 | if (err) { |
1843 | dev_err(dev, "failed to map buffer, fd = %d\n", req.fd); | |
1844 | return err; | |
1845 | } | |
1846 | ||
1847 | req_msg.pgid = fl->tgid; | |
1848 | req_msg.fd = req.fd; | |
1849 | req_msg.offset = req.offset; | |
1850 | req_msg.vaddrin = req.vaddrin; | |
1851 | map->va = (void *) (uintptr_t) req.vaddrin; | |
1852 | req_msg.flags = req.flags; | |
1853 | req_msg.num = sizeof(pages); | |
1854 | req_msg.data_len = 0; | |
1855 | ||
1856 | args[0].ptr = (u64) (uintptr_t) &req_msg; | |
1857 | args[0].length = sizeof(req_msg); | |
1858 | ||
1859 | pages.addr = map->phys; | |
1860 | pages.size = map->size; | |
1861 | ||
1862 | args[1].ptr = (u64) (uintptr_t) &pages; | |
1863 | args[1].length = sizeof(pages); | |
1864 | ||
1865 | args[2].ptr = (u64) (uintptr_t) &pages; | |
1866 | args[2].length = 0; | |
1867 | ||
1868 | args[3].ptr = (u64) (uintptr_t) &rsp_msg; | |
1869 | args[3].length = sizeof(rsp_msg); | |
1870 | ||
1871 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MEM_MAP, 3, 1); | |
1872 | err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, &args[0]); | |
1873 | if (err) { | |
1874 | dev_err(dev, "mem mmap error, fd %d, vaddr %llx, size %lld\n", | |
1875 | req.fd, req.vaddrin, map->size); | |
1876 | goto err_invoke; | |
1877 | } | |
1878 | ||
1879 | /* update the buffer to be able to deallocate the memory on the DSP */ | |
1880 | map->raddr = rsp_msg.vaddr; | |
1881 | ||
1882 | /* let the client know the address to use */ | |
1883 | req.vaddrout = rsp_msg.vaddr; | |
1884 | ||
1885 | if (copy_to_user((void __user *)argp, &req, sizeof(req))) { | |
1886 | /* unmap the memory and release the buffer */ | |
1887 | req_unmap.vaddr = (uintptr_t) rsp_msg.vaddr; | |
1888 | req_unmap.length = map->size; | |
1889 | fastrpc_req_mem_unmap_impl(fl, &req_unmap); | |
1890 | return -EFAULT; | |
1891 | } | |
1892 | ||
1893 | return 0; | |
1894 | ||
1895 | err_invoke: | |
1896 | fastrpc_map_put(map); | |
1897 | ||
1898 | return err; | |
1899 | } | |
1900 | ||
c68cfb71 SK |
1901 | static long fastrpc_device_ioctl(struct file *file, unsigned int cmd, |
1902 | unsigned long arg) | |
1903 | { | |
1904 | struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; | |
1905 | char __user *argp = (char __user *)arg; | |
1906 | int err; | |
1907 | ||
1908 | switch (cmd) { | |
1909 | case FASTRPC_IOCTL_INVOKE: | |
1910 | err = fastrpc_invoke(fl, argp); | |
1911 | break; | |
d73f71c7 | 1912 | case FASTRPC_IOCTL_INIT_ATTACH: |
1959ab9e | 1913 | err = fastrpc_init_attach(fl, ROOT_PD); |
6010d9be JM |
1914 | break; |
1915 | case FASTRPC_IOCTL_INIT_ATTACH_SNS: | |
1916 | err = fastrpc_init_attach(fl, SENSORS_PD); | |
d73f71c7 SK |
1917 | break; |
1918 | case FASTRPC_IOCTL_INIT_CREATE: | |
1919 | err = fastrpc_init_create_process(fl, argp); | |
1920 | break; | |
6cffd795 SK |
1921 | case FASTRPC_IOCTL_ALLOC_DMA_BUFF: |
1922 | err = fastrpc_dmabuf_alloc(fl, argp); | |
1923 | break; | |
2419e55e JRO |
1924 | case FASTRPC_IOCTL_MMAP: |
1925 | err = fastrpc_req_mmap(fl, argp); | |
1926 | break; | |
1927 | case FASTRPC_IOCTL_MUNMAP: | |
1928 | err = fastrpc_req_munmap(fl, argp); | |
1929 | break; | |
5c1b97c7 J |
1930 | case FASTRPC_IOCTL_MEM_MAP: |
1931 | err = fastrpc_req_mem_map(fl, argp); | |
1932 | break; | |
1933 | case FASTRPC_IOCTL_MEM_UNMAP: | |
1934 | err = fastrpc_req_mem_unmap(fl, argp); | |
1935 | break; | |
6c16fd8b J |
1936 | case FASTRPC_IOCTL_GET_DSP_INFO: |
1937 | err = fastrpc_get_dsp_info(fl, argp); | |
1938 | break; | |
c68cfb71 SK |
1939 | default: |
1940 | err = -ENOTTY; | |
1941 | break; | |
1942 | } | |
1943 | ||
1944 | return err; | |
1945 | } | |
1946 | ||
f6f9279f SK |
1947 | static const struct file_operations fastrpc_fops = { |
1948 | .open = fastrpc_device_open, | |
1949 | .release = fastrpc_device_release, | |
c68cfb71 SK |
1950 | .unlocked_ioctl = fastrpc_device_ioctl, |
1951 | .compat_ioctl = fastrpc_device_ioctl, | |
f6f9279f SK |
1952 | }; |
1953 | ||
1954 | static int fastrpc_cb_probe(struct platform_device *pdev) | |
1955 | { | |
1956 | struct fastrpc_channel_ctx *cctx; | |
1957 | struct fastrpc_session_ctx *sess; | |
1958 | struct device *dev = &pdev->dev; | |
1959 | int i, sessions = 0; | |
977e6c8d | 1960 | unsigned long flags; |
01b76c32 | 1961 | int rc; |
f6f9279f SK |
1962 | |
1963 | cctx = dev_get_drvdata(dev->parent); | |
1964 | if (!cctx) | |
1965 | return -EINVAL; | |
1966 | ||
1967 | of_property_read_u32(dev->of_node, "qcom,nsessions", &sessions); | |
1968 | ||
977e6c8d | 1969 | spin_lock_irqsave(&cctx->lock, flags); |
9baa1415 JH |
1970 | if (cctx->sesscount >= FASTRPC_MAX_SESSIONS) { |
1971 | dev_err(&pdev->dev, "too many sessions\n"); | |
1972 | spin_unlock_irqrestore(&cctx->lock, flags); | |
1973 | return -ENOSPC; | |
1974 | } | |
d245f43a | 1975 | sess = &cctx->session[cctx->sesscount++]; |
f6f9279f SK |
1976 | sess->used = false; |
1977 | sess->valid = true; | |
1978 | sess->dev = dev; | |
1979 | dev_set_drvdata(dev, sess); | |
1980 | ||
1981 | if (of_property_read_u32(dev->of_node, "reg", &sess->sid)) | |
1982 | dev_info(dev, "FastRPC Session ID not specified in DT\n"); | |
1983 | ||
1984 | if (sessions > 0) { | |
1985 | struct fastrpc_session_ctx *dup_sess; | |
1986 | ||
1987 | for (i = 1; i < sessions; i++) { | |
d245f43a | 1988 | if (cctx->sesscount >= FASTRPC_MAX_SESSIONS) |
f6f9279f | 1989 | break; |
d245f43a | 1990 | dup_sess = &cctx->session[cctx->sesscount++]; |
f6f9279f SK |
1991 | memcpy(dup_sess, sess, sizeof(*dup_sess)); |
1992 | } | |
1993 | } | |
977e6c8d | 1994 | spin_unlock_irqrestore(&cctx->lock, flags); |
01b76c32 BY |
1995 | rc = dma_set_mask(dev, DMA_BIT_MASK(32)); |
1996 | if (rc) { | |
1997 | dev_err(dev, "32-bit DMA enable failed\n"); | |
1998 | return rc; | |
1999 | } | |
f6f9279f SK |
2000 | |
2001 | return 0; | |
2002 | } | |
2003 | ||
2004 | static int fastrpc_cb_remove(struct platform_device *pdev) | |
2005 | { | |
2006 | struct fastrpc_channel_ctx *cctx = dev_get_drvdata(pdev->dev.parent); | |
2007 | struct fastrpc_session_ctx *sess = dev_get_drvdata(&pdev->dev); | |
977e6c8d | 2008 | unsigned long flags; |
f6f9279f SK |
2009 | int i; |
2010 | ||
977e6c8d | 2011 | spin_lock_irqsave(&cctx->lock, flags); |
f6f9279f SK |
2012 | for (i = 1; i < FASTRPC_MAX_SESSIONS; i++) { |
2013 | if (cctx->session[i].sid == sess->sid) { | |
2014 | cctx->session[i].valid = false; | |
2015 | cctx->sesscount--; | |
2016 | } | |
2017 | } | |
977e6c8d | 2018 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f SK |
2019 | |
2020 | return 0; | |
2021 | } | |
2022 | ||
2023 | static const struct of_device_id fastrpc_match_table[] = { | |
2024 | { .compatible = "qcom,fastrpc-compute-cb", }, | |
2025 | {} | |
2026 | }; | |
2027 | ||
2028 | static struct platform_driver fastrpc_cb_driver = { | |
2029 | .probe = fastrpc_cb_probe, | |
2030 | .remove = fastrpc_cb_remove, | |
2031 | .driver = { | |
2032 | .name = "qcom,fastrpc-cb", | |
2033 | .of_match_table = fastrpc_match_table, | |
2034 | .suppress_bind_attrs = true, | |
2035 | }, | |
2036 | }; | |
2037 | ||
965602ea | 2038 | static int fastrpc_device_register(struct device *dev, struct fastrpc_channel_ctx *cctx, |
3abe3ab3 | 2039 | bool is_secured, const char *domain) |
965602ea SK |
2040 | { |
2041 | struct fastrpc_device *fdev; | |
2042 | int err; | |
2043 | ||
2044 | fdev = devm_kzalloc(dev, sizeof(*fdev), GFP_KERNEL); | |
2045 | if (!fdev) | |
2046 | return -ENOMEM; | |
2047 | ||
3abe3ab3 | 2048 | fdev->secure = is_secured; |
965602ea SK |
2049 | fdev->cctx = cctx; |
2050 | fdev->miscdev.minor = MISC_DYNAMIC_MINOR; | |
2051 | fdev->miscdev.fops = &fastrpc_fops; | |
3abe3ab3 SK |
2052 | fdev->miscdev.name = devm_kasprintf(dev, GFP_KERNEL, "fastrpc-%s%s", |
2053 | domain, is_secured ? "-secure" : ""); | |
965602ea | 2054 | err = misc_register(&fdev->miscdev); |
3abe3ab3 SK |
2055 | if (!err) { |
2056 | if (is_secured) | |
2057 | cctx->secure_fdevice = fdev; | |
2058 | else | |
2059 | cctx->fdevice = fdev; | |
2060 | } | |
965602ea SK |
2061 | |
2062 | return err; | |
2063 | } | |
2064 | ||
f6f9279f SK |
2065 | static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev) |
2066 | { | |
2067 | struct device *rdev = &rpdev->dev; | |
2068 | struct fastrpc_channel_ctx *data; | |
e90d9119 | 2069 | int i, err, domain_id = -1, vmcount; |
f6f9279f | 2070 | const char *domain; |
3abe3ab3 | 2071 | bool secure_dsp; |
e90d9119 | 2072 | unsigned int vmids[FASTRPC_MAX_VMIDS]; |
f6f9279f | 2073 | |
f6f9279f SK |
2074 | err = of_property_read_string(rdev->of_node, "label", &domain); |
2075 | if (err) { | |
2076 | dev_info(rdev, "FastRPC Domain not specified in DT\n"); | |
2077 | return err; | |
2078 | } | |
2079 | ||
2080 | for (i = 0; i <= CDSP_DOMAIN_ID; i++) { | |
2081 | if (!strcmp(domains[i], domain)) { | |
2082 | domain_id = i; | |
2083 | break; | |
2084 | } | |
2085 | } | |
2086 | ||
2087 | if (domain_id < 0) { | |
2088 | dev_info(rdev, "FastRPC Invalid Domain ID %d\n", domain_id); | |
2089 | return -EINVAL; | |
2090 | } | |
2091 | ||
1ce91d45 AV |
2092 | if (of_reserved_mem_device_init_by_idx(rdev, rdev->of_node, 0)) |
2093 | dev_info(rdev, "no reserved DMA memory for FASTRPC\n"); | |
2094 | ||
e90d9119 VKG |
2095 | vmcount = of_property_read_variable_u32_array(rdev->of_node, |
2096 | "qcom,vmids", &vmids[0], 0, FASTRPC_MAX_VMIDS); | |
2097 | if (vmcount < 0) | |
2098 | vmcount = 0; | |
2099 | else if (!qcom_scm_is_available()) | |
2100 | return -EPROBE_DEFER; | |
2101 | ||
278d56f9 BA |
2102 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
2103 | if (!data) | |
2104 | return -ENOMEM; | |
2105 | ||
e90d9119 VKG |
2106 | if (vmcount) { |
2107 | data->vmcount = vmcount; | |
2108 | data->perms = BIT(QCOM_SCM_VMID_HLOS); | |
2109 | for (i = 0; i < data->vmcount; i++) { | |
2110 | data->vmperms[i].vmid = vmids[i]; | |
2111 | data->vmperms[i].perm = QCOM_SCM_PERM_RWX; | |
2112 | } | |
2113 | } | |
3abe3ab3 SK |
2114 | |
2115 | secure_dsp = !(of_property_read_bool(rdev->of_node, "qcom,non-secure-domain")); | |
2116 | data->secure = secure_dsp; | |
2117 | ||
2118 | switch (domain_id) { | |
2119 | case ADSP_DOMAIN_ID: | |
2120 | case MDSP_DOMAIN_ID: | |
2121 | case SDSP_DOMAIN_ID: | |
7f1f4812 J |
2122 | /* Unsigned PD offloading is only supported on CDSP*/ |
2123 | data->unsigned_support = false; | |
3abe3ab3 SK |
2124 | err = fastrpc_device_register(rdev, data, secure_dsp, domains[domain_id]); |
2125 | if (err) | |
2126 | goto fdev_error; | |
2127 | break; | |
2128 | case CDSP_DOMAIN_ID: | |
7f1f4812 | 2129 | data->unsigned_support = true; |
3abe3ab3 SK |
2130 | /* Create both device nodes so that we can allow both Signed and Unsigned PD */ |
2131 | err = fastrpc_device_register(rdev, data, true, domains[domain_id]); | |
2132 | if (err) | |
2133 | goto fdev_error; | |
2134 | ||
2135 | err = fastrpc_device_register(rdev, data, false, domains[domain_id]); | |
2136 | if (err) | |
2137 | goto fdev_error; | |
2138 | break; | |
2139 | default: | |
2140 | err = -EINVAL; | |
2141 | goto fdev_error; | |
0978de9f | 2142 | } |
f6f9279f | 2143 | |
278d56f9 BA |
2144 | kref_init(&data->refcount); |
2145 | ||
f6f9279f SK |
2146 | dev_set_drvdata(&rpdev->dev, data); |
2147 | dma_set_mask_and_coherent(rdev, DMA_BIT_MASK(32)); | |
2148 | INIT_LIST_HEAD(&data->users); | |
2149 | spin_lock_init(&data->lock); | |
2150 | idr_init(&data->ctx_idr); | |
2151 | data->domain_id = domain_id; | |
2152 | data->rpdev = rpdev; | |
2153 | ||
2154 | return of_platform_populate(rdev->of_node, NULL, NULL, rdev); | |
3abe3ab3 SK |
2155 | fdev_error: |
2156 | kfree(data); | |
2157 | return err; | |
f6f9279f SK |
2158 | } |
2159 | ||
c68cfb71 SK |
2160 | static void fastrpc_notify_users(struct fastrpc_user *user) |
2161 | { | |
2162 | struct fastrpc_invoke_ctx *ctx; | |
2163 | ||
2164 | spin_lock(&user->lock); | |
2165 | list_for_each_entry(ctx, &user->pending, node) | |
2166 | complete(&ctx->work); | |
2167 | spin_unlock(&user->lock); | |
2168 | } | |
2169 | ||
f6f9279f SK |
2170 | static void fastrpc_rpmsg_remove(struct rpmsg_device *rpdev) |
2171 | { | |
2172 | struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); | |
c68cfb71 | 2173 | struct fastrpc_user *user; |
977e6c8d | 2174 | unsigned long flags; |
c68cfb71 | 2175 | |
977e6c8d | 2176 | spin_lock_irqsave(&cctx->lock, flags); |
c68cfb71 SK |
2177 | list_for_each_entry(user, &cctx->users, user) |
2178 | fastrpc_notify_users(user); | |
977e6c8d | 2179 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f | 2180 | |
965602ea SK |
2181 | if (cctx->fdevice) |
2182 | misc_deregister(&cctx->fdevice->miscdev); | |
2183 | ||
3abe3ab3 SK |
2184 | if (cctx->secure_fdevice) |
2185 | misc_deregister(&cctx->secure_fdevice->miscdev); | |
2186 | ||
f6f9279f | 2187 | of_platform_depopulate(&rpdev->dev); |
278d56f9 | 2188 | |
2e369878 | 2189 | cctx->rpdev = NULL; |
278d56f9 | 2190 | fastrpc_channel_ctx_put(cctx); |
f6f9279f SK |
2191 | } |
2192 | ||
2193 | static int fastrpc_rpmsg_callback(struct rpmsg_device *rpdev, void *data, | |
2194 | int len, void *priv, u32 addr) | |
2195 | { | |
c68cfb71 SK |
2196 | struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); |
2197 | struct fastrpc_invoke_rsp *rsp = data; | |
2198 | struct fastrpc_invoke_ctx *ctx; | |
2199 | unsigned long flags; | |
2200 | unsigned long ctxid; | |
2201 | ||
2202 | if (len < sizeof(*rsp)) | |
2203 | return -EINVAL; | |
2204 | ||
2205 | ctxid = ((rsp->ctx & FASTRPC_CTXID_MASK) >> 4); | |
2206 | ||
2207 | spin_lock_irqsave(&cctx->lock, flags); | |
2208 | ctx = idr_find(&cctx->ctx_idr, ctxid); | |
2209 | spin_unlock_irqrestore(&cctx->lock, flags); | |
2210 | ||
2211 | if (!ctx) { | |
2212 | dev_err(&rpdev->dev, "No context ID matches response\n"); | |
2213 | return -ENOENT; | |
2214 | } | |
2215 | ||
2216 | ctx->retval = rsp->retval; | |
2217 | complete(&ctx->work); | |
8e7389c7 TE |
2218 | |
2219 | /* | |
2220 | * The DMA buffer associated with the context cannot be freed in | |
2221 | * interrupt context so schedule it through a worker thread to | |
2222 | * avoid a kernel BUG. | |
2223 | */ | |
2224 | schedule_work(&ctx->put_work); | |
c68cfb71 | 2225 | |
f6f9279f SK |
2226 | return 0; |
2227 | } | |
2228 | ||
2229 | static const struct of_device_id fastrpc_rpmsg_of_match[] = { | |
2230 | { .compatible = "qcom,fastrpc" }, | |
2231 | { }, | |
2232 | }; | |
2233 | MODULE_DEVICE_TABLE(of, fastrpc_rpmsg_of_match); | |
2234 | ||
2235 | static struct rpmsg_driver fastrpc_driver = { | |
2236 | .probe = fastrpc_rpmsg_probe, | |
2237 | .remove = fastrpc_rpmsg_remove, | |
2238 | .callback = fastrpc_rpmsg_callback, | |
2239 | .drv = { | |
2240 | .name = "qcom,fastrpc", | |
2241 | .of_match_table = fastrpc_rpmsg_of_match, | |
2242 | }, | |
2243 | }; | |
2244 | ||
2245 | static int fastrpc_init(void) | |
2246 | { | |
2247 | int ret; | |
2248 | ||
2249 | ret = platform_driver_register(&fastrpc_cb_driver); | |
2250 | if (ret < 0) { | |
2251 | pr_err("fastrpc: failed to register cb driver\n"); | |
2252 | return ret; | |
2253 | } | |
2254 | ||
2255 | ret = register_rpmsg_driver(&fastrpc_driver); | |
2256 | if (ret < 0) { | |
2257 | pr_err("fastrpc: failed to register rpmsg driver\n"); | |
2258 | platform_driver_unregister(&fastrpc_cb_driver); | |
2259 | return ret; | |
2260 | } | |
2261 | ||
2262 | return 0; | |
2263 | } | |
2264 | module_init(fastrpc_init); | |
2265 | ||
2266 | static void fastrpc_exit(void) | |
2267 | { | |
2268 | platform_driver_unregister(&fastrpc_cb_driver); | |
2269 | unregister_rpmsg_driver(&fastrpc_driver); | |
2270 | } | |
2271 | module_exit(fastrpc_exit); | |
2272 | ||
2273 | MODULE_LICENSE("GPL v2"); | |
16b0314a | 2274 | MODULE_IMPORT_NS(DMA_BUF); |