Commit | Line | Data |
---|---|---|
f6f9279f SK |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | // Copyright (c) 2011-2018, The Linux Foundation. All rights reserved. | |
3 | // Copyright (c) 2018, Linaro Limited | |
4 | ||
c68cfb71 | 5 | #include <linux/completion.h> |
f6f9279f | 6 | #include <linux/device.h> |
c68cfb71 | 7 | #include <linux/dma-buf.h> |
f6f9279f | 8 | #include <linux/dma-mapping.h> |
265751a5 | 9 | #include <linux/dma-resv.h> |
f6f9279f SK |
10 | #include <linux/idr.h> |
11 | #include <linux/list.h> | |
12 | #include <linux/miscdevice.h> | |
13 | #include <linux/module.h> | |
14 | #include <linux/of_address.h> | |
15 | #include <linux/of.h> | |
d9c58aeb | 16 | #include <linux/platform_device.h> |
25e8dfb8 | 17 | #include <linux/sort.h> |
f6f9279f SK |
18 | #include <linux/of_platform.h> |
19 | #include <linux/rpmsg.h> | |
20 | #include <linux/scatterlist.h> | |
21 | #include <linux/slab.h> | |
3bf90eca | 22 | #include <linux/firmware/qcom/qcom_scm.h> |
c68cfb71 | 23 | #include <uapi/misc/fastrpc.h> |
1ce91d45 | 24 | #include <linux/of_reserved_mem.h> |
f6f9279f SK |
25 | |
26 | #define ADSP_DOMAIN_ID (0) | |
27 | #define MDSP_DOMAIN_ID (1) | |
28 | #define SDSP_DOMAIN_ID (2) | |
29 | #define CDSP_DOMAIN_ID (3) | |
30 | #define FASTRPC_DEV_MAX 4 /* adsp, mdsp, slpi, cdsp*/ | |
689a2d9f | 31 | #define FASTRPC_MAX_SESSIONS 14 |
e90d9119 | 32 | #define FASTRPC_MAX_VMIDS 16 |
c68cfb71 SK |
33 | #define FASTRPC_ALIGN 128 |
34 | #define FASTRPC_MAX_FDLIST 16 | |
35 | #define FASTRPC_MAX_CRCLIST 64 | |
36 | #define FASTRPC_PHYS(p) ((p) & 0xffffffff) | |
f6f9279f | 37 | #define FASTRPC_CTX_MAX (256) |
d73f71c7 | 38 | #define FASTRPC_INIT_HANDLE 1 |
6c16fd8b | 39 | #define FASTRPC_DSP_UTILITIES_HANDLE 2 |
f6f9279f | 40 | #define FASTRPC_CTXID_MASK (0xFF0) |
efcd2390 | 41 | #define INIT_FILELEN_MAX (2 * 1024 * 1024) |
08715610 | 42 | #define INIT_FILE_NAMELEN_MAX (128) |
f6f9279f | 43 | #define FASTRPC_DEVICE_NAME "fastrpc" |
08715610 AV |
44 | |
45 | /* Add memory to static PD pool, protection thru XPU */ | |
46 | #define ADSP_MMAP_HEAP_ADDR 4 | |
47 | /* MAP static DMA buffer on DSP User PD */ | |
48 | #define ADSP_MMAP_DMA_BUFFER 6 | |
49 | /* Add memory to static PD pool protection thru hypervisor */ | |
50 | #define ADSP_MMAP_REMOTE_HEAP_ADDR 8 | |
51 | /* Add memory to userPD pool, for user heap */ | |
2419e55e | 52 | #define ADSP_MMAP_ADD_PAGES 0x1000 |
08715610 AV |
53 | /* Add memory to userPD pool, for LLC heap */ |
54 | #define ADSP_MMAP_ADD_PAGES_LLC 0x3000, | |
55 | ||
6c16fd8b J |
56 | #define DSP_UNSUPPORTED_API (0x80000414) |
57 | /* MAX NUMBER of DSP ATTRIBUTES SUPPORTED */ | |
58 | #define FASTRPC_MAX_DSP_ATTRIBUTES (256) | |
59 | #define FASTRPC_MAX_DSP_ATTRIBUTES_LEN (sizeof(u32) * FASTRPC_MAX_DSP_ATTRIBUTES) | |
f6f9279f | 60 | |
c68cfb71 SK |
61 | /* Retrives number of input buffers from the scalars parameter */ |
62 | #define REMOTE_SCALARS_INBUFS(sc) (((sc) >> 16) & 0x0ff) | |
63 | ||
64 | /* Retrives number of output buffers from the scalars parameter */ | |
65 | #define REMOTE_SCALARS_OUTBUFS(sc) (((sc) >> 8) & 0x0ff) | |
66 | ||
67 | /* Retrives number of input handles from the scalars parameter */ | |
68 | #define REMOTE_SCALARS_INHANDLES(sc) (((sc) >> 4) & 0x0f) | |
69 | ||
70 | /* Retrives number of output handles from the scalars parameter */ | |
71 | #define REMOTE_SCALARS_OUTHANDLES(sc) ((sc) & 0x0f) | |
72 | ||
73 | #define REMOTE_SCALARS_LENGTH(sc) (REMOTE_SCALARS_INBUFS(sc) + \ | |
74 | REMOTE_SCALARS_OUTBUFS(sc) + \ | |
75 | REMOTE_SCALARS_INHANDLES(sc)+ \ | |
76 | REMOTE_SCALARS_OUTHANDLES(sc)) | |
77 | #define FASTRPC_BUILD_SCALARS(attr, method, in, out, oin, oout) \ | |
78 | (((attr & 0x07) << 29) | \ | |
79 | ((method & 0x1f) << 24) | \ | |
80 | ((in & 0xff) << 16) | \ | |
81 | ((out & 0xff) << 8) | \ | |
82 | ((oin & 0x0f) << 4) | \ | |
83 | (oout & 0x0f)) | |
84 | ||
85 | #define FASTRPC_SCALARS(method, in, out) \ | |
86 | FASTRPC_BUILD_SCALARS(0, method, in, out, 0, 0) | |
87 | ||
d73f71c7 | 88 | #define FASTRPC_CREATE_PROCESS_NARGS 6 |
08715610 | 89 | #define FASTRPC_CREATE_STATIC_PROCESS_NARGS 3 |
d73f71c7 SK |
90 | /* Remote Method id table */ |
91 | #define FASTRPC_RMID_INIT_ATTACH 0 | |
92 | #define FASTRPC_RMID_INIT_RELEASE 1 | |
2419e55e JRO |
93 | #define FASTRPC_RMID_INIT_MMAP 4 |
94 | #define FASTRPC_RMID_INIT_MUNMAP 5 | |
d73f71c7 SK |
95 | #define FASTRPC_RMID_INIT_CREATE 6 |
96 | #define FASTRPC_RMID_INIT_CREATE_ATTR 7 | |
97 | #define FASTRPC_RMID_INIT_CREATE_STATIC 8 | |
5c1b97c7 J |
98 | #define FASTRPC_RMID_INIT_MEM_MAP 10 |
99 | #define FASTRPC_RMID_INIT_MEM_UNMAP 11 | |
d73f71c7 | 100 | |
84195d20 | 101 | /* Protection Domain(PD) ids */ |
1959ab9e | 102 | #define ROOT_PD (0) |
84195d20 JM |
103 | #define USER_PD (1) |
104 | #define SENSORS_PD (2) | |
105 | ||
965602ea | 106 | #define miscdev_to_fdevice(d) container_of(d, struct fastrpc_device, miscdev) |
f6f9279f SK |
107 | |
108 | static const char *domains[FASTRPC_DEV_MAX] = { "adsp", "mdsp", | |
109 | "sdsp", "cdsp"}; | |
c68cfb71 SK |
110 | struct fastrpc_phy_page { |
111 | u64 addr; /* physical address */ | |
112 | u64 size; /* size of contiguous region */ | |
113 | }; | |
114 | ||
115 | struct fastrpc_invoke_buf { | |
116 | u32 num; /* number of contiguous regions */ | |
117 | u32 pgidx; /* index to start of contiguous region */ | |
118 | }; | |
119 | ||
35a82b87 VKG |
120 | struct fastrpc_remote_dmahandle { |
121 | s32 fd; /* dma handle fd */ | |
122 | u32 offset; /* dma handle offset */ | |
123 | u32 len; /* dma handle length */ | |
124 | }; | |
125 | ||
126 | struct fastrpc_remote_buf { | |
127 | u64 pv; /* buffer pointer */ | |
128 | u64 len; /* length of buffer */ | |
129 | }; | |
130 | ||
131 | union fastrpc_remote_arg { | |
132 | struct fastrpc_remote_buf buf; | |
133 | struct fastrpc_remote_dmahandle dma; | |
c68cfb71 SK |
134 | }; |
135 | ||
2419e55e JRO |
136 | struct fastrpc_mmap_rsp_msg { |
137 | u64 vaddr; | |
138 | }; | |
139 | ||
140 | struct fastrpc_mmap_req_msg { | |
141 | s32 pgid; | |
142 | u32 flags; | |
143 | u64 vaddr; | |
144 | s32 num; | |
145 | }; | |
146 | ||
5c1b97c7 J |
147 | struct fastrpc_mem_map_req_msg { |
148 | s32 pgid; | |
149 | s32 fd; | |
150 | s32 offset; | |
151 | u32 flags; | |
152 | u64 vaddrin; | |
153 | s32 num; | |
154 | s32 data_len; | |
155 | }; | |
156 | ||
2419e55e JRO |
157 | struct fastrpc_munmap_req_msg { |
158 | s32 pgid; | |
159 | u64 vaddr; | |
160 | u64 size; | |
161 | }; | |
162 | ||
5c1b97c7 J |
163 | struct fastrpc_mem_unmap_req_msg { |
164 | s32 pgid; | |
165 | s32 fd; | |
166 | u64 vaddrin; | |
167 | u64 len; | |
168 | }; | |
169 | ||
c68cfb71 SK |
170 | struct fastrpc_msg { |
171 | int pid; /* process group id */ | |
172 | int tid; /* thread id */ | |
173 | u64 ctx; /* invoke caller context */ | |
174 | u32 handle; /* handle to invoke */ | |
175 | u32 sc; /* scalars structure describing the data */ | |
176 | u64 addr; /* physical address */ | |
177 | u64 size; /* size of contiguous region */ | |
178 | }; | |
179 | ||
180 | struct fastrpc_invoke_rsp { | |
181 | u64 ctx; /* invoke caller context */ | |
182 | int retval; /* invoke return value */ | |
183 | }; | |
184 | ||
25e8dfb8 SK |
185 | struct fastrpc_buf_overlap { |
186 | u64 start; | |
187 | u64 end; | |
188 | int raix; | |
189 | u64 mstart; | |
190 | u64 mend; | |
191 | u64 offset; | |
192 | }; | |
193 | ||
c68cfb71 SK |
194 | struct fastrpc_buf { |
195 | struct fastrpc_user *fl; | |
6cffd795 | 196 | struct dma_buf *dmabuf; |
c68cfb71 SK |
197 | struct device *dev; |
198 | void *virt; | |
199 | u64 phys; | |
200 | u64 size; | |
6cffd795 SK |
201 | /* Lock for dma buf attachments */ |
202 | struct mutex lock; | |
203 | struct list_head attachments; | |
2419e55e JRO |
204 | /* mmap support */ |
205 | struct list_head node; /* list of user requested mmaps */ | |
206 | uintptr_t raddr; | |
6cffd795 SK |
207 | }; |
208 | ||
209 | struct fastrpc_dma_buf_attachment { | |
210 | struct device *dev; | |
211 | struct sg_table sgt; | |
212 | struct list_head node; | |
c68cfb71 SK |
213 | }; |
214 | ||
215 | struct fastrpc_map { | |
216 | struct list_head node; | |
217 | struct fastrpc_user *fl; | |
218 | int fd; | |
219 | struct dma_buf *buf; | |
220 | struct sg_table *table; | |
221 | struct dma_buf_attachment *attach; | |
222 | u64 phys; | |
223 | u64 size; | |
224 | void *va; | |
225 | u64 len; | |
5c1b97c7 | 226 | u64 raddr; |
e90d9119 | 227 | u32 attr; |
c68cfb71 SK |
228 | struct kref refcount; |
229 | }; | |
230 | ||
231 | struct fastrpc_invoke_ctx { | |
232 | int nscalars; | |
233 | int nbufs; | |
234 | int retval; | |
235 | int pid; | |
236 | int tgid; | |
237 | u32 sc; | |
238 | u32 *crc; | |
239 | u64 ctxid; | |
240 | u64 msg_sz; | |
241 | struct kref refcount; | |
242 | struct list_head node; /* list of ctxs */ | |
243 | struct completion work; | |
8e7389c7 | 244 | struct work_struct put_work; |
c68cfb71 SK |
245 | struct fastrpc_msg msg; |
246 | struct fastrpc_user *fl; | |
35a82b87 | 247 | union fastrpc_remote_arg *rpra; |
c68cfb71 SK |
248 | struct fastrpc_map **maps; |
249 | struct fastrpc_buf *buf; | |
250 | struct fastrpc_invoke_args *args; | |
25e8dfb8 | 251 | struct fastrpc_buf_overlap *olaps; |
c68cfb71 SK |
252 | struct fastrpc_channel_ctx *cctx; |
253 | }; | |
f6f9279f SK |
254 | |
255 | struct fastrpc_session_ctx { | |
256 | struct device *dev; | |
257 | int sid; | |
258 | bool used; | |
259 | bool valid; | |
260 | }; | |
261 | ||
262 | struct fastrpc_channel_ctx { | |
263 | int domain_id; | |
264 | int sesscount; | |
e90d9119 | 265 | int vmcount; |
e90d9119 | 266 | struct qcom_scm_vmperm vmperms[FASTRPC_MAX_VMIDS]; |
f6f9279f SK |
267 | struct rpmsg_device *rpdev; |
268 | struct fastrpc_session_ctx session[FASTRPC_MAX_SESSIONS]; | |
269 | spinlock_t lock; | |
270 | struct idr ctx_idr; | |
271 | struct list_head users; | |
278d56f9 | 272 | struct kref refcount; |
6c16fd8b J |
273 | /* Flag if dsp attributes are cached */ |
274 | bool valid_attributes; | |
275 | u32 dsp_attributes[FASTRPC_MAX_DSP_ATTRIBUTES]; | |
3abe3ab3 | 276 | struct fastrpc_device *secure_fdevice; |
965602ea | 277 | struct fastrpc_device *fdevice; |
08715610 | 278 | struct fastrpc_buf *remote_heap; |
76e8e4ac | 279 | struct list_head invoke_interrupted_mmaps; |
3abe3ab3 | 280 | bool secure; |
7f1f4812 | 281 | bool unsigned_support; |
9bde43a0 | 282 | u64 dma_mask; |
965602ea SK |
283 | }; |
284 | ||
285 | struct fastrpc_device { | |
286 | struct fastrpc_channel_ctx *cctx; | |
287 | struct miscdevice miscdev; | |
3abe3ab3 | 288 | bool secure; |
f6f9279f SK |
289 | }; |
290 | ||
291 | struct fastrpc_user { | |
292 | struct list_head user; | |
293 | struct list_head maps; | |
294 | struct list_head pending; | |
2419e55e | 295 | struct list_head mmaps; |
f6f9279f SK |
296 | |
297 | struct fastrpc_channel_ctx *cctx; | |
298 | struct fastrpc_session_ctx *sctx; | |
c68cfb71 | 299 | struct fastrpc_buf *init_mem; |
f6f9279f SK |
300 | |
301 | int tgid; | |
302 | int pd; | |
7f1f4812 | 303 | bool is_secure_dev; |
f6f9279f SK |
304 | /* Lock for lists */ |
305 | spinlock_t lock; | |
306 | /* lock for allocations */ | |
307 | struct mutex mutex; | |
308 | }; | |
309 | ||
c68cfb71 SK |
310 | static void fastrpc_free_map(struct kref *ref) |
311 | { | |
312 | struct fastrpc_map *map; | |
313 | ||
314 | map = container_of(ref, struct fastrpc_map, refcount); | |
315 | ||
316 | if (map->table) { | |
e90d9119 VKG |
317 | if (map->attr & FASTRPC_ATTR_SECUREMAP) { |
318 | struct qcom_scm_vmperm perm; | |
a6e766de EG |
319 | int vmid = map->fl->cctx->vmperms[0].vmid; |
320 | u64 src_perms = BIT(QCOM_SCM_VMID_HLOS) | BIT(vmid); | |
e90d9119 VKG |
321 | int err = 0; |
322 | ||
323 | perm.vmid = QCOM_SCM_VMID_HLOS; | |
324 | perm.perm = QCOM_SCM_PERM_RWX; | |
325 | err = qcom_scm_assign_mem(map->phys, map->size, | |
a6e766de | 326 | &src_perms, &perm, 1); |
e90d9119 VKG |
327 | if (err) { |
328 | dev_err(map->fl->sctx->dev, "Failed to assign memory phys 0x%llx size 0x%llx err %d", | |
329 | map->phys, map->size, err); | |
330 | return; | |
331 | } | |
332 | } | |
791da5c7 DO |
333 | dma_buf_unmap_attachment_unlocked(map->attach, map->table, |
334 | DMA_BIDIRECTIONAL); | |
c68cfb71 SK |
335 | dma_buf_detach(map->buf, map->attach); |
336 | dma_buf_put(map->buf); | |
337 | } | |
338 | ||
5bb96c8f AV |
339 | if (map->fl) { |
340 | spin_lock(&map->fl->lock); | |
341 | list_del(&map->node); | |
342 | spin_unlock(&map->fl->lock); | |
343 | map->fl = NULL; | |
344 | } | |
345 | ||
c68cfb71 SK |
346 | kfree(map); |
347 | } | |
348 | ||
349 | static void fastrpc_map_put(struct fastrpc_map *map) | |
350 | { | |
351 | if (map) | |
352 | kref_put(&map->refcount, fastrpc_free_map); | |
353 | } | |
354 | ||
96b328d1 | 355 | static int fastrpc_map_get(struct fastrpc_map *map) |
c68cfb71 | 356 | { |
96b328d1 OJ |
357 | if (!map) |
358 | return -ENOENT; | |
359 | ||
360 | return kref_get_unless_zero(&map->refcount) ? 0 : -ENOENT; | |
c68cfb71 SK |
361 | } |
362 | ||
8f6c1d8c VKG |
363 | |
364 | static int fastrpc_map_lookup(struct fastrpc_user *fl, int fd, | |
9446fa16 | 365 | struct fastrpc_map **ppmap, bool take_ref) |
c68cfb71 | 366 | { |
9446fa16 | 367 | struct fastrpc_session_ctx *sess = fl->sctx; |
c68cfb71 | 368 | struct fastrpc_map *map = NULL; |
9446fa16 | 369 | int ret = -ENOENT; |
c68cfb71 | 370 | |
9446fa16 | 371 | spin_lock(&fl->lock); |
c68cfb71 | 372 | list_for_each_entry(map, &fl->maps, node) { |
9446fa16 AV |
373 | if (map->fd != fd) |
374 | continue; | |
c68cfb71 | 375 | |
9446fa16 AV |
376 | if (take_ref) { |
377 | ret = fastrpc_map_get(map); | |
378 | if (ret) { | |
379 | dev_dbg(sess->dev, "%s: Failed to get map fd=%d ret=%d\n", | |
380 | __func__, fd, ret); | |
381 | break; | |
382 | } | |
383 | } | |
8f6c1d8c | 384 | |
9446fa16 AV |
385 | *ppmap = map; |
386 | ret = 0; | |
387 | break; | |
388 | } | |
389 | spin_unlock(&fl->lock); | |
8f6c1d8c VKG |
390 | |
391 | return ret; | |
392 | } | |
393 | ||
c68cfb71 SK |
394 | static void fastrpc_buf_free(struct fastrpc_buf *buf) |
395 | { | |
396 | dma_free_coherent(buf->dev, buf->size, buf->virt, | |
397 | FASTRPC_PHYS(buf->phys)); | |
398 | kfree(buf); | |
399 | } | |
400 | ||
6f18c7e8 | 401 | static int __fastrpc_buf_alloc(struct fastrpc_user *fl, struct device *dev, |
c68cfb71 SK |
402 | u64 size, struct fastrpc_buf **obuf) |
403 | { | |
404 | struct fastrpc_buf *buf; | |
405 | ||
406 | buf = kzalloc(sizeof(*buf), GFP_KERNEL); | |
407 | if (!buf) | |
408 | return -ENOMEM; | |
409 | ||
6cffd795 | 410 | INIT_LIST_HEAD(&buf->attachments); |
2419e55e | 411 | INIT_LIST_HEAD(&buf->node); |
6cffd795 SK |
412 | mutex_init(&buf->lock); |
413 | ||
c68cfb71 SK |
414 | buf->fl = fl; |
415 | buf->virt = NULL; | |
416 | buf->phys = 0; | |
417 | buf->size = size; | |
418 | buf->dev = dev; | |
2419e55e | 419 | buf->raddr = 0; |
c68cfb71 SK |
420 | |
421 | buf->virt = dma_alloc_coherent(dev, buf->size, (dma_addr_t *)&buf->phys, | |
422 | GFP_KERNEL); | |
41db5f83 JRO |
423 | if (!buf->virt) { |
424 | mutex_destroy(&buf->lock); | |
425 | kfree(buf); | |
c68cfb71 | 426 | return -ENOMEM; |
41db5f83 | 427 | } |
c68cfb71 | 428 | |
6f18c7e8 AV |
429 | *obuf = buf; |
430 | ||
431 | return 0; | |
432 | } | |
433 | ||
434 | static int fastrpc_buf_alloc(struct fastrpc_user *fl, struct device *dev, | |
435 | u64 size, struct fastrpc_buf **obuf) | |
436 | { | |
437 | int ret; | |
438 | struct fastrpc_buf *buf; | |
439 | ||
440 | ret = __fastrpc_buf_alloc(fl, dev, size, obuf); | |
441 | if (ret) | |
442 | return ret; | |
443 | ||
444 | buf = *obuf; | |
445 | ||
c68cfb71 SK |
446 | if (fl->sctx && fl->sctx->sid) |
447 | buf->phys += ((u64)fl->sctx->sid << 32); | |
448 | ||
c68cfb71 SK |
449 | return 0; |
450 | } | |
451 | ||
6f18c7e8 AV |
452 | static int fastrpc_remote_heap_alloc(struct fastrpc_user *fl, struct device *dev, |
453 | u64 size, struct fastrpc_buf **obuf) | |
454 | { | |
455 | struct device *rdev = &fl->cctx->rpdev->dev; | |
456 | ||
457 | return __fastrpc_buf_alloc(fl, rdev, size, obuf); | |
458 | } | |
459 | ||
278d56f9 BA |
460 | static void fastrpc_channel_ctx_free(struct kref *ref) |
461 | { | |
462 | struct fastrpc_channel_ctx *cctx; | |
463 | ||
464 | cctx = container_of(ref, struct fastrpc_channel_ctx, refcount); | |
465 | ||
466 | kfree(cctx); | |
467 | } | |
468 | ||
469 | static void fastrpc_channel_ctx_get(struct fastrpc_channel_ctx *cctx) | |
470 | { | |
471 | kref_get(&cctx->refcount); | |
472 | } | |
473 | ||
474 | static void fastrpc_channel_ctx_put(struct fastrpc_channel_ctx *cctx) | |
475 | { | |
476 | kref_put(&cctx->refcount, fastrpc_channel_ctx_free); | |
477 | } | |
478 | ||
c68cfb71 SK |
479 | static void fastrpc_context_free(struct kref *ref) |
480 | { | |
481 | struct fastrpc_invoke_ctx *ctx; | |
482 | struct fastrpc_channel_ctx *cctx; | |
977e6c8d | 483 | unsigned long flags; |
c68cfb71 SK |
484 | int i; |
485 | ||
486 | ctx = container_of(ref, struct fastrpc_invoke_ctx, refcount); | |
487 | cctx = ctx->cctx; | |
488 | ||
8f6c1d8c | 489 | for (i = 0; i < ctx->nbufs; i++) |
c68cfb71 SK |
490 | fastrpc_map_put(ctx->maps[i]); |
491 | ||
492 | if (ctx->buf) | |
493 | fastrpc_buf_free(ctx->buf); | |
494 | ||
977e6c8d | 495 | spin_lock_irqsave(&cctx->lock, flags); |
c68cfb71 | 496 | idr_remove(&cctx->ctx_idr, ctx->ctxid >> 4); |
977e6c8d | 497 | spin_unlock_irqrestore(&cctx->lock, flags); |
c68cfb71 SK |
498 | |
499 | kfree(ctx->maps); | |
25e8dfb8 | 500 | kfree(ctx->olaps); |
c68cfb71 | 501 | kfree(ctx); |
278d56f9 BA |
502 | |
503 | fastrpc_channel_ctx_put(cctx); | |
c68cfb71 SK |
504 | } |
505 | ||
506 | static void fastrpc_context_get(struct fastrpc_invoke_ctx *ctx) | |
507 | { | |
508 | kref_get(&ctx->refcount); | |
509 | } | |
510 | ||
511 | static void fastrpc_context_put(struct fastrpc_invoke_ctx *ctx) | |
512 | { | |
513 | kref_put(&ctx->refcount, fastrpc_context_free); | |
514 | } | |
515 | ||
8e7389c7 TE |
516 | static void fastrpc_context_put_wq(struct work_struct *work) |
517 | { | |
518 | struct fastrpc_invoke_ctx *ctx = | |
519 | container_of(work, struct fastrpc_invoke_ctx, put_work); | |
520 | ||
521 | fastrpc_context_put(ctx); | |
522 | } | |
523 | ||
25e8dfb8 SK |
524 | #define CMP(aa, bb) ((aa) == (bb) ? 0 : (aa) < (bb) ? -1 : 1) |
525 | static int olaps_cmp(const void *a, const void *b) | |
526 | { | |
527 | struct fastrpc_buf_overlap *pa = (struct fastrpc_buf_overlap *)a; | |
528 | struct fastrpc_buf_overlap *pb = (struct fastrpc_buf_overlap *)b; | |
529 | /* sort with lowest starting buffer first */ | |
530 | int st = CMP(pa->start, pb->start); | |
531 | /* sort with highest ending buffer first */ | |
532 | int ed = CMP(pb->end, pa->end); | |
533 | ||
534 | return st == 0 ? ed : st; | |
535 | } | |
536 | ||
537 | static void fastrpc_get_buff_overlaps(struct fastrpc_invoke_ctx *ctx) | |
538 | { | |
539 | u64 max_end = 0; | |
540 | int i; | |
541 | ||
542 | for (i = 0; i < ctx->nbufs; ++i) { | |
543 | ctx->olaps[i].start = ctx->args[i].ptr; | |
544 | ctx->olaps[i].end = ctx->olaps[i].start + ctx->args[i].length; | |
545 | ctx->olaps[i].raix = i; | |
546 | } | |
547 | ||
548 | sort(ctx->olaps, ctx->nbufs, sizeof(*ctx->olaps), olaps_cmp, NULL); | |
549 | ||
550 | for (i = 0; i < ctx->nbufs; ++i) { | |
551 | /* Falling inside previous range */ | |
552 | if (ctx->olaps[i].start < max_end) { | |
553 | ctx->olaps[i].mstart = max_end; | |
554 | ctx->olaps[i].mend = ctx->olaps[i].end; | |
555 | ctx->olaps[i].offset = max_end - ctx->olaps[i].start; | |
556 | ||
557 | if (ctx->olaps[i].end > max_end) { | |
558 | max_end = ctx->olaps[i].end; | |
559 | } else { | |
560 | ctx->olaps[i].mend = 0; | |
561 | ctx->olaps[i].mstart = 0; | |
562 | } | |
563 | ||
564 | } else { | |
565 | ctx->olaps[i].mend = ctx->olaps[i].end; | |
566 | ctx->olaps[i].mstart = ctx->olaps[i].start; | |
567 | ctx->olaps[i].offset = 0; | |
568 | max_end = ctx->olaps[i].end; | |
569 | } | |
570 | } | |
571 | } | |
572 | ||
c68cfb71 SK |
573 | static struct fastrpc_invoke_ctx *fastrpc_context_alloc( |
574 | struct fastrpc_user *user, u32 kernel, u32 sc, | |
575 | struct fastrpc_invoke_args *args) | |
576 | { | |
577 | struct fastrpc_channel_ctx *cctx = user->cctx; | |
578 | struct fastrpc_invoke_ctx *ctx = NULL; | |
977e6c8d | 579 | unsigned long flags; |
c68cfb71 SK |
580 | int ret; |
581 | ||
582 | ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); | |
583 | if (!ctx) | |
584 | return ERR_PTR(-ENOMEM); | |
585 | ||
586 | INIT_LIST_HEAD(&ctx->node); | |
587 | ctx->fl = user; | |
588 | ctx->nscalars = REMOTE_SCALARS_LENGTH(sc); | |
589 | ctx->nbufs = REMOTE_SCALARS_INBUFS(sc) + | |
590 | REMOTE_SCALARS_OUTBUFS(sc); | |
591 | ||
592 | if (ctx->nscalars) { | |
593 | ctx->maps = kcalloc(ctx->nscalars, | |
594 | sizeof(*ctx->maps), GFP_KERNEL); | |
595 | if (!ctx->maps) { | |
596 | kfree(ctx); | |
597 | return ERR_PTR(-ENOMEM); | |
598 | } | |
25e8dfb8 SK |
599 | ctx->olaps = kcalloc(ctx->nscalars, |
600 | sizeof(*ctx->olaps), GFP_KERNEL); | |
601 | if (!ctx->olaps) { | |
602 | kfree(ctx->maps); | |
603 | kfree(ctx); | |
604 | return ERR_PTR(-ENOMEM); | |
605 | } | |
c68cfb71 | 606 | ctx->args = args; |
25e8dfb8 | 607 | fastrpc_get_buff_overlaps(ctx); |
c68cfb71 SK |
608 | } |
609 | ||
278d56f9 BA |
610 | /* Released in fastrpc_context_put() */ |
611 | fastrpc_channel_ctx_get(cctx); | |
612 | ||
c68cfb71 SK |
613 | ctx->sc = sc; |
614 | ctx->retval = -1; | |
615 | ctx->pid = current->pid; | |
616 | ctx->tgid = user->tgid; | |
617 | ctx->cctx = cctx; | |
618 | init_completion(&ctx->work); | |
8e7389c7 | 619 | INIT_WORK(&ctx->put_work, fastrpc_context_put_wq); |
c68cfb71 SK |
620 | |
621 | spin_lock(&user->lock); | |
622 | list_add_tail(&ctx->node, &user->pending); | |
623 | spin_unlock(&user->lock); | |
624 | ||
977e6c8d | 625 | spin_lock_irqsave(&cctx->lock, flags); |
c68cfb71 SK |
626 | ret = idr_alloc_cyclic(&cctx->ctx_idr, ctx, 1, |
627 | FASTRPC_CTX_MAX, GFP_ATOMIC); | |
628 | if (ret < 0) { | |
977e6c8d | 629 | spin_unlock_irqrestore(&cctx->lock, flags); |
c68cfb71 SK |
630 | goto err_idr; |
631 | } | |
632 | ctx->ctxid = ret << 4; | |
977e6c8d | 633 | spin_unlock_irqrestore(&cctx->lock, flags); |
c68cfb71 SK |
634 | |
635 | kref_init(&ctx->refcount); | |
636 | ||
637 | return ctx; | |
638 | err_idr: | |
639 | spin_lock(&user->lock); | |
640 | list_del(&ctx->node); | |
641 | spin_unlock(&user->lock); | |
278d56f9 | 642 | fastrpc_channel_ctx_put(cctx); |
c68cfb71 | 643 | kfree(ctx->maps); |
25e8dfb8 | 644 | kfree(ctx->olaps); |
c68cfb71 SK |
645 | kfree(ctx); |
646 | ||
647 | return ERR_PTR(ret); | |
648 | } | |
649 | ||
6cffd795 SK |
650 | static struct sg_table * |
651 | fastrpc_map_dma_buf(struct dma_buf_attachment *attachment, | |
652 | enum dma_data_direction dir) | |
653 | { | |
654 | struct fastrpc_dma_buf_attachment *a = attachment->priv; | |
655 | struct sg_table *table; | |
b212658a | 656 | int ret; |
6cffd795 SK |
657 | |
658 | table = &a->sgt; | |
659 | ||
b212658a JM |
660 | ret = dma_map_sgtable(attachment->dev, table, dir, 0); |
661 | if (ret) | |
662 | table = ERR_PTR(ret); | |
6cffd795 SK |
663 | return table; |
664 | } | |
665 | ||
666 | static void fastrpc_unmap_dma_buf(struct dma_buf_attachment *attach, | |
667 | struct sg_table *table, | |
668 | enum dma_data_direction dir) | |
669 | { | |
7cd7edb8 | 670 | dma_unmap_sgtable(attach->dev, table, dir, 0); |
6cffd795 SK |
671 | } |
672 | ||
673 | static void fastrpc_release(struct dma_buf *dmabuf) | |
674 | { | |
675 | struct fastrpc_buf *buffer = dmabuf->priv; | |
676 | ||
677 | fastrpc_buf_free(buffer); | |
678 | } | |
679 | ||
680 | static int fastrpc_dma_buf_attach(struct dma_buf *dmabuf, | |
681 | struct dma_buf_attachment *attachment) | |
682 | { | |
683 | struct fastrpc_dma_buf_attachment *a; | |
684 | struct fastrpc_buf *buffer = dmabuf->priv; | |
685 | int ret; | |
686 | ||
687 | a = kzalloc(sizeof(*a), GFP_KERNEL); | |
688 | if (!a) | |
689 | return -ENOMEM; | |
690 | ||
691 | ret = dma_get_sgtable(buffer->dev, &a->sgt, buffer->virt, | |
692 | FASTRPC_PHYS(buffer->phys), buffer->size); | |
693 | if (ret < 0) { | |
694 | dev_err(buffer->dev, "failed to get scatterlist from DMA API\n"); | |
fc739a05 | 695 | kfree(a); |
6cffd795 SK |
696 | return -EINVAL; |
697 | } | |
698 | ||
699 | a->dev = attachment->dev; | |
700 | INIT_LIST_HEAD(&a->node); | |
701 | attachment->priv = a; | |
702 | ||
703 | mutex_lock(&buffer->lock); | |
704 | list_add(&a->node, &buffer->attachments); | |
705 | mutex_unlock(&buffer->lock); | |
706 | ||
707 | return 0; | |
708 | } | |
709 | ||
710 | static void fastrpc_dma_buf_detatch(struct dma_buf *dmabuf, | |
711 | struct dma_buf_attachment *attachment) | |
712 | { | |
713 | struct fastrpc_dma_buf_attachment *a = attachment->priv; | |
714 | struct fastrpc_buf *buffer = dmabuf->priv; | |
715 | ||
716 | mutex_lock(&buffer->lock); | |
717 | list_del(&a->node); | |
718 | mutex_unlock(&buffer->lock); | |
cf61860e | 719 | sg_free_table(&a->sgt); |
6cffd795 SK |
720 | kfree(a); |
721 | } | |
722 | ||
7938f421 | 723 | static int fastrpc_vmap(struct dma_buf *dmabuf, struct iosys_map *map) |
6cffd795 SK |
724 | { |
725 | struct fastrpc_buf *buf = dmabuf->priv; | |
726 | ||
7938f421 | 727 | iosys_map_set_vaddr(map, buf->virt); |
6619ccf1 TZ |
728 | |
729 | return 0; | |
6cffd795 SK |
730 | } |
731 | ||
732 | static int fastrpc_mmap(struct dma_buf *dmabuf, | |
733 | struct vm_area_struct *vma) | |
734 | { | |
735 | struct fastrpc_buf *buf = dmabuf->priv; | |
736 | size_t size = vma->vm_end - vma->vm_start; | |
737 | ||
265751a5 DO |
738 | dma_resv_assert_held(dmabuf->resv); |
739 | ||
6cffd795 SK |
740 | return dma_mmap_coherent(buf->dev, vma, buf->virt, |
741 | FASTRPC_PHYS(buf->phys), size); | |
742 | } | |
743 | ||
744 | static const struct dma_buf_ops fastrpc_dma_buf_ops = { | |
745 | .attach = fastrpc_dma_buf_attach, | |
746 | .detach = fastrpc_dma_buf_detatch, | |
747 | .map_dma_buf = fastrpc_map_dma_buf, | |
748 | .unmap_dma_buf = fastrpc_unmap_dma_buf, | |
749 | .mmap = fastrpc_mmap, | |
6cffd795 SK |
750 | .vmap = fastrpc_vmap, |
751 | .release = fastrpc_release, | |
752 | }; | |
753 | ||
c68cfb71 | 754 | static int fastrpc_map_create(struct fastrpc_user *fl, int fd, |
e90d9119 | 755 | u64 len, u32 attr, struct fastrpc_map **ppmap) |
c68cfb71 SK |
756 | { |
757 | struct fastrpc_session_ctx *sess = fl->sctx; | |
758 | struct fastrpc_map *map = NULL; | |
a2cb9cd6 | 759 | struct sg_table *table; |
c68cfb71 SK |
760 | int err = 0; |
761 | ||
9446fa16 | 762 | if (!fastrpc_map_lookup(fl, fd, ppmap, true)) |
c68cfb71 SK |
763 | return 0; |
764 | ||
765 | map = kzalloc(sizeof(*map), GFP_KERNEL); | |
766 | if (!map) | |
767 | return -ENOMEM; | |
768 | ||
769 | INIT_LIST_HEAD(&map->node); | |
334f1a1c AV |
770 | kref_init(&map->refcount); |
771 | ||
c68cfb71 SK |
772 | map->fl = fl; |
773 | map->fd = fd; | |
774 | map->buf = dma_buf_get(fd); | |
682a6044 WY |
775 | if (IS_ERR(map->buf)) { |
776 | err = PTR_ERR(map->buf); | |
c68cfb71 SK |
777 | goto get_err; |
778 | } | |
779 | ||
780 | map->attach = dma_buf_attach(map->buf, sess->dev); | |
781 | if (IS_ERR(map->attach)) { | |
782 | dev_err(sess->dev, "Failed to attach dmabuf\n"); | |
783 | err = PTR_ERR(map->attach); | |
784 | goto attach_err; | |
785 | } | |
786 | ||
a2cb9cd6 EG |
787 | table = dma_buf_map_attachment_unlocked(map->attach, DMA_BIDIRECTIONAL); |
788 | if (IS_ERR(table)) { | |
789 | err = PTR_ERR(table); | |
c68cfb71 SK |
790 | goto map_err; |
791 | } | |
a2cb9cd6 | 792 | map->table = table; |
c68cfb71 | 793 | |
a6e766de EG |
794 | if (attr & FASTRPC_ATTR_SECUREMAP) { |
795 | map->phys = sg_phys(map->table->sgl); | |
796 | } else { | |
797 | map->phys = sg_dma_address(map->table->sgl); | |
798 | map->phys += ((u64)fl->sctx->sid << 32); | |
799 | } | |
c68cfb71 SK |
800 | map->size = len; |
801 | map->va = sg_virt(map->table->sgl); | |
802 | map->len = len; | |
c68cfb71 | 803 | |
e90d9119 VKG |
804 | if (attr & FASTRPC_ATTR_SECUREMAP) { |
805 | /* | |
806 | * If subsystem VMIDs are defined in DTSI, then do | |
807 | * hyp_assign from HLOS to those VM(s) | |
808 | */ | |
a6e766de EG |
809 | u64 src_perms = BIT(QCOM_SCM_VMID_HLOS); |
810 | struct qcom_scm_vmperm dst_perms[2] = {0}; | |
811 | ||
812 | dst_perms[0].vmid = QCOM_SCM_VMID_HLOS; | |
813 | dst_perms[0].perm = QCOM_SCM_PERM_RW; | |
814 | dst_perms[1].vmid = fl->cctx->vmperms[0].vmid; | |
815 | dst_perms[1].perm = QCOM_SCM_PERM_RWX; | |
e90d9119 | 816 | map->attr = attr; |
a6e766de | 817 | err = qcom_scm_assign_mem(map->phys, (u64)map->size, &src_perms, dst_perms, 2); |
e90d9119 VKG |
818 | if (err) { |
819 | dev_err(sess->dev, "Failed to assign memory with phys 0x%llx size 0x%llx err %d", | |
820 | map->phys, map->size, err); | |
821 | goto map_err; | |
822 | } | |
823 | } | |
c68cfb71 SK |
824 | spin_lock(&fl->lock); |
825 | list_add_tail(&map->node, &fl->maps); | |
826 | spin_unlock(&fl->lock); | |
827 | *ppmap = map; | |
828 | ||
829 | return 0; | |
830 | ||
831 | map_err: | |
832 | dma_buf_detach(map->buf, map->attach); | |
833 | attach_err: | |
834 | dma_buf_put(map->buf); | |
835 | get_err: | |
334f1a1c | 836 | fastrpc_map_put(map); |
c68cfb71 SK |
837 | |
838 | return err; | |
839 | } | |
840 | ||
841 | /* | |
842 | * Fastrpc payload buffer with metadata looks like: | |
843 | * | |
844 | * >>>>>> START of METADATA <<<<<<<<< | |
845 | * +---------------------------------+ | |
846 | * | Arguments | | |
35a82b87 | 847 | * | type:(union fastrpc_remote_arg)| |
c68cfb71 SK |
848 | * | (0 - N) | |
849 | * +---------------------------------+ | |
850 | * | Invoke Buffer list | | |
851 | * | type:(struct fastrpc_invoke_buf)| | |
852 | * | (0 - N) | | |
853 | * +---------------------------------+ | |
854 | * | Page info list | | |
855 | * | type:(struct fastrpc_phy_page) | | |
856 | * | (0 - N) | | |
857 | * +---------------------------------+ | |
858 | * | Optional info | | |
859 | * |(can be specific to SoC/Firmware)| | |
860 | * +---------------------------------+ | |
861 | * >>>>>>>> END of METADATA <<<<<<<<< | |
862 | * +---------------------------------+ | |
863 | * | Inline ARGS | | |
864 | * | (0-N) | | |
865 | * +---------------------------------+ | |
866 | */ | |
867 | ||
868 | static int fastrpc_get_meta_size(struct fastrpc_invoke_ctx *ctx) | |
869 | { | |
870 | int size = 0; | |
871 | ||
35a82b87 | 872 | size = (sizeof(struct fastrpc_remote_buf) + |
c68cfb71 SK |
873 | sizeof(struct fastrpc_invoke_buf) + |
874 | sizeof(struct fastrpc_phy_page)) * ctx->nscalars + | |
875 | sizeof(u64) * FASTRPC_MAX_FDLIST + | |
876 | sizeof(u32) * FASTRPC_MAX_CRCLIST; | |
877 | ||
878 | return size; | |
879 | } | |
880 | ||
881 | static u64 fastrpc_get_payload_size(struct fastrpc_invoke_ctx *ctx, int metalen) | |
882 | { | |
883 | u64 size = 0; | |
3a1bf591 | 884 | int oix; |
c68cfb71 SK |
885 | |
886 | size = ALIGN(metalen, FASTRPC_ALIGN); | |
3a1bf591 J |
887 | for (oix = 0; oix < ctx->nbufs; oix++) { |
888 | int i = ctx->olaps[oix].raix; | |
889 | ||
c68cfb71 | 890 | if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1) { |
25e8dfb8 | 891 | |
3a1bf591 | 892 | if (ctx->olaps[oix].offset == 0) |
25e8dfb8 SK |
893 | size = ALIGN(size, FASTRPC_ALIGN); |
894 | ||
3a1bf591 | 895 | size += (ctx->olaps[oix].mend - ctx->olaps[oix].mstart); |
c68cfb71 SK |
896 | } |
897 | } | |
898 | ||
899 | return size; | |
900 | } | |
901 | ||
902 | static int fastrpc_create_maps(struct fastrpc_invoke_ctx *ctx) | |
903 | { | |
904 | struct device *dev = ctx->fl->sctx->dev; | |
905 | int i, err; | |
906 | ||
907 | for (i = 0; i < ctx->nscalars; ++i) { | |
c68cfb71 SK |
908 | |
909 | if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1 || | |
910 | ctx->args[i].length == 0) | |
911 | continue; | |
912 | ||
913 | err = fastrpc_map_create(ctx->fl, ctx->args[i].fd, | |
e90d9119 | 914 | ctx->args[i].length, ctx->args[i].attr, &ctx->maps[i]); |
c68cfb71 SK |
915 | if (err) { |
916 | dev_err(dev, "Error Creating map %d\n", err); | |
917 | return -EINVAL; | |
918 | } | |
919 | ||
920 | } | |
921 | return 0; | |
922 | } | |
923 | ||
54f7c85b VKG |
924 | static struct fastrpc_invoke_buf *fastrpc_invoke_buf_start(union fastrpc_remote_arg *pra, int len) |
925 | { | |
926 | return (struct fastrpc_invoke_buf *)(&pra[len]); | |
927 | } | |
928 | ||
929 | static struct fastrpc_phy_page *fastrpc_phy_page_start(struct fastrpc_invoke_buf *buf, int len) | |
930 | { | |
931 | return (struct fastrpc_phy_page *)(&buf[len]); | |
932 | } | |
933 | ||
c68cfb71 SK |
934 | static int fastrpc_get_args(u32 kernel, struct fastrpc_invoke_ctx *ctx) |
935 | { | |
936 | struct device *dev = ctx->fl->sctx->dev; | |
35a82b87 | 937 | union fastrpc_remote_arg *rpra; |
c68cfb71 SK |
938 | struct fastrpc_invoke_buf *list; |
939 | struct fastrpc_phy_page *pages; | |
25e8dfb8 SK |
940 | int inbufs, i, oix, err = 0; |
941 | u64 len, rlen, pkt_size; | |
02b45b47 | 942 | u64 pg_start, pg_end; |
c68cfb71 SK |
943 | uintptr_t args; |
944 | int metalen; | |
945 | ||
c68cfb71 SK |
946 | inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); |
947 | metalen = fastrpc_get_meta_size(ctx); | |
948 | pkt_size = fastrpc_get_payload_size(ctx, metalen); | |
949 | ||
950 | err = fastrpc_create_maps(ctx); | |
951 | if (err) | |
952 | return err; | |
953 | ||
954 | ctx->msg_sz = pkt_size; | |
955 | ||
956 | err = fastrpc_buf_alloc(ctx->fl, dev, pkt_size, &ctx->buf); | |
957 | if (err) | |
958 | return err; | |
959 | ||
1c29d801 | 960 | memset(ctx->buf->virt, 0, pkt_size); |
c68cfb71 | 961 | rpra = ctx->buf->virt; |
54f7c85b VKG |
962 | list = fastrpc_invoke_buf_start(rpra, ctx->nscalars); |
963 | pages = fastrpc_phy_page_start(list, ctx->nscalars); | |
c68cfb71 SK |
964 | args = (uintptr_t)ctx->buf->virt + metalen; |
965 | rlen = pkt_size - metalen; | |
966 | ctx->rpra = rpra; | |
967 | ||
25e8dfb8 SK |
968 | for (oix = 0; oix < ctx->nbufs; ++oix) { |
969 | int mlen; | |
970 | ||
971 | i = ctx->olaps[oix].raix; | |
972 | len = ctx->args[i].length; | |
c68cfb71 | 973 | |
35a82b87 VKG |
974 | rpra[i].buf.pv = 0; |
975 | rpra[i].buf.len = len; | |
c68cfb71 SK |
976 | list[i].num = len ? 1 : 0; |
977 | list[i].pgidx = i; | |
978 | ||
979 | if (!len) | |
980 | continue; | |
981 | ||
c68cfb71 | 982 | if (ctx->maps[i]) { |
80f3afd7 SK |
983 | struct vm_area_struct *vma = NULL; |
984 | ||
35a82b87 | 985 | rpra[i].buf.pv = (u64) ctx->args[i].ptr; |
c68cfb71 | 986 | pages[i].addr = ctx->maps[i]->phys; |
80f3afd7 | 987 | |
f9a470db | 988 | mmap_read_lock(current->mm); |
80f3afd7 SK |
989 | vma = find_vma(current->mm, ctx->args[i].ptr); |
990 | if (vma) | |
991 | pages[i].addr += ctx->args[i].ptr - | |
992 | vma->vm_start; | |
f9a470db | 993 | mmap_read_unlock(current->mm); |
80f3afd7 | 994 | |
02b45b47 SK |
995 | pg_start = (ctx->args[i].ptr & PAGE_MASK) >> PAGE_SHIFT; |
996 | pg_end = ((ctx->args[i].ptr + len - 1) & PAGE_MASK) >> | |
997 | PAGE_SHIFT; | |
998 | pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; | |
999 | ||
c68cfb71 | 1000 | } else { |
25e8dfb8 SK |
1001 | |
1002 | if (ctx->olaps[oix].offset == 0) { | |
1003 | rlen -= ALIGN(args, FASTRPC_ALIGN) - args; | |
1004 | args = ALIGN(args, FASTRPC_ALIGN); | |
1005 | } | |
1006 | ||
1007 | mlen = ctx->olaps[oix].mend - ctx->olaps[oix].mstart; | |
1008 | ||
1009 | if (rlen < mlen) | |
c68cfb71 SK |
1010 | goto bail; |
1011 | ||
35a82b87 | 1012 | rpra[i].buf.pv = args - ctx->olaps[oix].offset; |
25e8dfb8 SK |
1013 | pages[i].addr = ctx->buf->phys - |
1014 | ctx->olaps[oix].offset + | |
1015 | (pkt_size - rlen); | |
c68cfb71 | 1016 | pages[i].addr = pages[i].addr & PAGE_MASK; |
25e8dfb8 | 1017 | |
02b45b47 SK |
1018 | pg_start = (args & PAGE_MASK) >> PAGE_SHIFT; |
1019 | pg_end = ((args + len - 1) & PAGE_MASK) >> PAGE_SHIFT; | |
1020 | pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; | |
25e8dfb8 SK |
1021 | args = args + mlen; |
1022 | rlen -= mlen; | |
c68cfb71 SK |
1023 | } |
1024 | ||
1025 | if (i < inbufs && !ctx->maps[i]) { | |
35a82b87 | 1026 | void *dst = (void *)(uintptr_t)rpra[i].buf.pv; |
c68cfb71 SK |
1027 | void *src = (void *)(uintptr_t)ctx->args[i].ptr; |
1028 | ||
1029 | if (!kernel) { | |
1030 | if (copy_from_user(dst, (void __user *)src, | |
1031 | len)) { | |
1032 | err = -EFAULT; | |
1033 | goto bail; | |
1034 | } | |
1035 | } else { | |
1036 | memcpy(dst, src, len); | |
1037 | } | |
1038 | } | |
1039 | } | |
1040 | ||
1041 | for (i = ctx->nbufs; i < ctx->nscalars; ++i) { | |
c68cfb71 SK |
1042 | list[i].num = ctx->args[i].length ? 1 : 0; |
1043 | list[i].pgidx = i; | |
35a82b87 VKG |
1044 | if (ctx->maps[i]) { |
1045 | pages[i].addr = ctx->maps[i]->phys; | |
1046 | pages[i].size = ctx->maps[i]->size; | |
1047 | } | |
1048 | rpra[i].dma.fd = ctx->args[i].fd; | |
1049 | rpra[i].dma.len = ctx->args[i].length; | |
1050 | rpra[i].dma.offset = (u64) ctx->args[i].ptr; | |
c68cfb71 SK |
1051 | } |
1052 | ||
1053 | bail: | |
1054 | if (err) | |
1055 | dev_err(dev, "Error: get invoke args failed:%d\n", err); | |
1056 | ||
1057 | return err; | |
1058 | } | |
1059 | ||
1060 | static int fastrpc_put_args(struct fastrpc_invoke_ctx *ctx, | |
1061 | u32 kernel) | |
1062 | { | |
35a82b87 | 1063 | union fastrpc_remote_arg *rpra = ctx->rpra; |
8f6c1d8c VKG |
1064 | struct fastrpc_user *fl = ctx->fl; |
1065 | struct fastrpc_map *mmap = NULL; | |
1066 | struct fastrpc_invoke_buf *list; | |
1067 | struct fastrpc_phy_page *pages; | |
1068 | u64 *fdlist; | |
1069 | int i, inbufs, outbufs, handles; | |
c68cfb71 SK |
1070 | |
1071 | inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); | |
8f6c1d8c VKG |
1072 | outbufs = REMOTE_SCALARS_OUTBUFS(ctx->sc); |
1073 | handles = REMOTE_SCALARS_INHANDLES(ctx->sc) + REMOTE_SCALARS_OUTHANDLES(ctx->sc); | |
1074 | list = fastrpc_invoke_buf_start(rpra, ctx->nscalars); | |
1075 | pages = fastrpc_phy_page_start(list, ctx->nscalars); | |
1076 | fdlist = (uint64_t *)(pages + inbufs + outbufs + handles); | |
c68cfb71 SK |
1077 | |
1078 | for (i = inbufs; i < ctx->nbufs; ++i) { | |
847afd7b | 1079 | if (!ctx->maps[i]) { |
35a82b87 | 1080 | void *src = (void *)(uintptr_t)rpra[i].buf.pv; |
847afd7b | 1081 | void *dst = (void *)(uintptr_t)ctx->args[i].ptr; |
35a82b87 | 1082 | u64 len = rpra[i].buf.len; |
c68cfb71 | 1083 | |
847afd7b J |
1084 | if (!kernel) { |
1085 | if (copy_to_user((void __user *)dst, src, len)) | |
1086 | return -EFAULT; | |
1087 | } else { | |
1088 | memcpy(dst, src, len); | |
1089 | } | |
c68cfb71 SK |
1090 | } |
1091 | } | |
1092 | ||
20648430 | 1093 | /* Clean up fdlist which is updated by DSP */ |
8f6c1d8c VKG |
1094 | for (i = 0; i < FASTRPC_MAX_FDLIST; i++) { |
1095 | if (!fdlist[i]) | |
1096 | break; | |
9446fa16 | 1097 | if (!fastrpc_map_lookup(fl, (int)fdlist[i], &mmap, false)) |
8f6c1d8c VKG |
1098 | fastrpc_map_put(mmap); |
1099 | } | |
1100 | ||
c68cfb71 SK |
1101 | return 0; |
1102 | } | |
1103 | ||
1104 | static int fastrpc_invoke_send(struct fastrpc_session_ctx *sctx, | |
1105 | struct fastrpc_invoke_ctx *ctx, | |
1106 | u32 kernel, uint32_t handle) | |
1107 | { | |
1108 | struct fastrpc_channel_ctx *cctx; | |
1109 | struct fastrpc_user *fl = ctx->fl; | |
1110 | struct fastrpc_msg *msg = &ctx->msg; | |
74003385 | 1111 | int ret; |
c68cfb71 SK |
1112 | |
1113 | cctx = fl->cctx; | |
1114 | msg->pid = fl->tgid; | |
1115 | msg->tid = current->pid; | |
1116 | ||
1117 | if (kernel) | |
1118 | msg->pid = 0; | |
1119 | ||
1120 | msg->ctx = ctx->ctxid | fl->pd; | |
1121 | msg->handle = handle; | |
1122 | msg->sc = ctx->sc; | |
1123 | msg->addr = ctx->buf ? ctx->buf->phys : 0; | |
1124 | msg->size = roundup(ctx->msg_sz, PAGE_SIZE); | |
1125 | fastrpc_context_get(ctx); | |
1126 | ||
74003385 SK |
1127 | ret = rpmsg_send(cctx->rpdev->ept, (void *)msg, sizeof(*msg)); |
1128 | ||
1129 | if (ret) | |
1130 | fastrpc_context_put(ctx); | |
1131 | ||
1132 | return ret; | |
1133 | ||
c68cfb71 SK |
1134 | } |
1135 | ||
1136 | static int fastrpc_internal_invoke(struct fastrpc_user *fl, u32 kernel, | |
1137 | u32 handle, u32 sc, | |
1138 | struct fastrpc_invoke_args *args) | |
1139 | { | |
1140 | struct fastrpc_invoke_ctx *ctx = NULL; | |
76e8e4ac AV |
1141 | struct fastrpc_buf *buf, *b; |
1142 | ||
c68cfb71 SK |
1143 | int err = 0; |
1144 | ||
1145 | if (!fl->sctx) | |
1146 | return -EINVAL; | |
1147 | ||
2e369878 BA |
1148 | if (!fl->cctx->rpdev) |
1149 | return -EPIPE; | |
1150 | ||
20c40794 DB |
1151 | if (handle == FASTRPC_INIT_HANDLE && !kernel) { |
1152 | dev_warn_ratelimited(fl->sctx->dev, "user app trying to send a kernel RPC message (%d)\n", handle); | |
1153 | return -EPERM; | |
1154 | } | |
1155 | ||
c68cfb71 SK |
1156 | ctx = fastrpc_context_alloc(fl, kernel, sc, args); |
1157 | if (IS_ERR(ctx)) | |
1158 | return PTR_ERR(ctx); | |
1159 | ||
20648430 EG |
1160 | err = fastrpc_get_args(kernel, ctx); |
1161 | if (err) | |
1162 | goto bail; | |
415a0729 SK |
1163 | |
1164 | /* make sure that all CPU memory writes are seen by DSP */ | |
1165 | dma_wmb(); | |
c68cfb71 SK |
1166 | /* Send invoke buffer to remote dsp */ |
1167 | err = fastrpc_invoke_send(fl->sctx, ctx, kernel, handle); | |
1168 | if (err) | |
1169 | goto bail; | |
1170 | ||
55bcda35 JRO |
1171 | if (kernel) { |
1172 | if (!wait_for_completion_timeout(&ctx->work, 10 * HZ)) | |
1173 | err = -ETIMEDOUT; | |
1174 | } else { | |
1175 | err = wait_for_completion_interruptible(&ctx->work); | |
1176 | } | |
1177 | ||
c68cfb71 SK |
1178 | if (err) |
1179 | goto bail; | |
1180 | ||
20648430 EG |
1181 | /* make sure that all memory writes by DSP are seen by CPU */ |
1182 | dma_rmb(); | |
1183 | /* populate all the output buffers with results */ | |
1184 | err = fastrpc_put_args(ctx, kernel); | |
1185 | if (err) | |
1186 | goto bail; | |
c68cfb71 | 1187 | |
1c809359 EG |
1188 | /* Check the response from remote dsp */ |
1189 | err = ctx->retval; | |
1190 | if (err) | |
1191 | goto bail; | |
1192 | ||
c68cfb71 | 1193 | bail: |
387f6255 JRO |
1194 | if (err != -ERESTARTSYS && err != -ETIMEDOUT) { |
1195 | /* We are done with this compute context */ | |
1196 | spin_lock(&fl->lock); | |
1197 | list_del(&ctx->node); | |
1198 | spin_unlock(&fl->lock); | |
1199 | fastrpc_context_put(ctx); | |
1200 | } | |
08715610 | 1201 | |
76e8e4ac AV |
1202 | if (err == -ERESTARTSYS) { |
1203 | list_for_each_entry_safe(buf, b, &fl->mmaps, node) { | |
1204 | list_del(&buf->node); | |
1205 | list_add_tail(&buf->node, &fl->cctx->invoke_interrupted_mmaps); | |
1206 | } | |
1207 | } | |
1208 | ||
c68cfb71 SK |
1209 | if (err) |
1210 | dev_dbg(fl->sctx->dev, "Error: Invoke Failed %d\n", err); | |
1211 | ||
1212 | return err; | |
1213 | } | |
1214 | ||
7f1f4812 J |
1215 | static bool is_session_rejected(struct fastrpc_user *fl, bool unsigned_pd_request) |
1216 | { | |
1217 | /* Check if the device node is non-secure and channel is secure*/ | |
1218 | if (!fl->is_secure_dev && fl->cctx->secure) { | |
1219 | /* | |
1220 | * Allow untrusted applications to offload only to Unsigned PD when | |
1221 | * channel is configured as secure and block untrusted apps on channel | |
1222 | * that does not support unsigned PD offload | |
1223 | */ | |
1224 | if (!fl->cctx->unsigned_support || !unsigned_pd_request) { | |
1225 | dev_err(&fl->cctx->rpdev->dev, "Error: Untrusted application trying to offload to signed PD"); | |
1226 | return true; | |
1227 | } | |
1228 | } | |
1229 | ||
1230 | return false; | |
1231 | } | |
1232 | ||
08715610 AV |
1233 | static int fastrpc_init_create_static_process(struct fastrpc_user *fl, |
1234 | char __user *argp) | |
1235 | { | |
1236 | struct fastrpc_init_create_static init; | |
1237 | struct fastrpc_invoke_args *args; | |
1238 | struct fastrpc_phy_page pages[1]; | |
1239 | char *name; | |
1240 | int err; | |
1241 | struct { | |
1242 | int pgid; | |
1243 | u32 namelen; | |
1244 | u32 pageslen; | |
1245 | } inbuf; | |
1246 | u32 sc; | |
1247 | ||
1248 | args = kcalloc(FASTRPC_CREATE_STATIC_PROCESS_NARGS, sizeof(*args), GFP_KERNEL); | |
1249 | if (!args) | |
1250 | return -ENOMEM; | |
1251 | ||
1252 | if (copy_from_user(&init, argp, sizeof(init))) { | |
1253 | err = -EFAULT; | |
1254 | goto err; | |
1255 | } | |
1256 | ||
1257 | if (init.namelen > INIT_FILE_NAMELEN_MAX) { | |
1258 | err = -EINVAL; | |
1259 | goto err; | |
1260 | } | |
1261 | ||
1262 | name = kzalloc(init.namelen, GFP_KERNEL); | |
1263 | if (!name) { | |
1264 | err = -ENOMEM; | |
1265 | goto err; | |
1266 | } | |
1267 | ||
1268 | if (copy_from_user(name, (void __user *)(uintptr_t)init.name, init.namelen)) { | |
1269 | err = -EFAULT; | |
1270 | goto err_name; | |
1271 | } | |
1272 | ||
1273 | if (!fl->cctx->remote_heap) { | |
1274 | err = fastrpc_remote_heap_alloc(fl, fl->sctx->dev, init.memlen, | |
1275 | &fl->cctx->remote_heap); | |
1276 | if (err) | |
1277 | goto err_name; | |
1278 | ||
1279 | /* Map if we have any heap VMIDs associated with this ADSP Static Process. */ | |
1280 | if (fl->cctx->vmcount) { | |
a283d7f1 EG |
1281 | u64 src_perms = BIT(QCOM_SCM_VMID_HLOS); |
1282 | ||
08715610 | 1283 | err = qcom_scm_assign_mem(fl->cctx->remote_heap->phys, |
aaca766c | 1284 | (u64)fl->cctx->remote_heap->size, |
a283d7f1 | 1285 | &src_perms, |
08715610 AV |
1286 | fl->cctx->vmperms, fl->cctx->vmcount); |
1287 | if (err) { | |
1288 | dev_err(fl->sctx->dev, "Failed to assign memory with phys 0x%llx size 0x%llx err %d", | |
1289 | fl->cctx->remote_heap->phys, fl->cctx->remote_heap->size, err); | |
1290 | goto err_map; | |
1291 | } | |
1292 | } | |
1293 | } | |
1294 | ||
1295 | inbuf.pgid = fl->tgid; | |
1296 | inbuf.namelen = init.namelen; | |
1297 | inbuf.pageslen = 0; | |
1298 | fl->pd = USER_PD; | |
1299 | ||
1300 | args[0].ptr = (u64)(uintptr_t)&inbuf; | |
1301 | args[0].length = sizeof(inbuf); | |
1302 | args[0].fd = -1; | |
1303 | ||
1304 | args[1].ptr = (u64)(uintptr_t)name; | |
1305 | args[1].length = inbuf.namelen; | |
1306 | args[1].fd = -1; | |
1307 | ||
1308 | pages[0].addr = fl->cctx->remote_heap->phys; | |
1309 | pages[0].size = fl->cctx->remote_heap->size; | |
1310 | ||
1311 | args[2].ptr = (u64)(uintptr_t) pages; | |
1312 | args[2].length = sizeof(*pages); | |
1313 | args[2].fd = -1; | |
1314 | ||
1315 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE_STATIC, 3, 0); | |
1316 | ||
1317 | err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, | |
1318 | sc, args); | |
1319 | if (err) | |
1320 | goto err_invoke; | |
1321 | ||
1322 | kfree(args); | |
1323 | ||
1324 | return 0; | |
1325 | err_invoke: | |
1326 | if (fl->cctx->vmcount) { | |
fe6518d5 EG |
1327 | u64 src_perms = 0; |
1328 | struct qcom_scm_vmperm dst_perms; | |
1329 | u32 i; | |
08715610 | 1330 | |
fe6518d5 EG |
1331 | for (i = 0; i < fl->cctx->vmcount; i++) |
1332 | src_perms |= BIT(fl->cctx->vmperms[i].vmid); | |
1333 | ||
1334 | dst_perms.vmid = QCOM_SCM_VMID_HLOS; | |
1335 | dst_perms.perm = QCOM_SCM_PERM_RWX; | |
08715610 AV |
1336 | err = qcom_scm_assign_mem(fl->cctx->remote_heap->phys, |
1337 | (u64)fl->cctx->remote_heap->size, | |
fe6518d5 | 1338 | &src_perms, &dst_perms, 1); |
08715610 AV |
1339 | if (err) |
1340 | dev_err(fl->sctx->dev, "Failed to assign memory phys 0x%llx size 0x%llx err %d", | |
1341 | fl->cctx->remote_heap->phys, fl->cctx->remote_heap->size, err); | |
1342 | } | |
1343 | err_map: | |
1344 | fastrpc_buf_free(fl->cctx->remote_heap); | |
1345 | err_name: | |
1346 | kfree(name); | |
1347 | err: | |
1348 | kfree(args); | |
1349 | ||
1350 | return err; | |
1351 | } | |
1352 | ||
d73f71c7 SK |
1353 | static int fastrpc_init_create_process(struct fastrpc_user *fl, |
1354 | char __user *argp) | |
1355 | { | |
1356 | struct fastrpc_init_create init; | |
1357 | struct fastrpc_invoke_args *args; | |
1358 | struct fastrpc_phy_page pages[1]; | |
1359 | struct fastrpc_map *map = NULL; | |
1360 | struct fastrpc_buf *imem = NULL; | |
1361 | int memlen; | |
1362 | int err; | |
1363 | struct { | |
1364 | int pgid; | |
1365 | u32 namelen; | |
1366 | u32 filelen; | |
1367 | u32 pageslen; | |
1368 | u32 attrs; | |
1369 | u32 siglen; | |
1370 | } inbuf; | |
1371 | u32 sc; | |
7f1f4812 | 1372 | bool unsigned_module = false; |
d73f71c7 SK |
1373 | |
1374 | args = kcalloc(FASTRPC_CREATE_PROCESS_NARGS, sizeof(*args), GFP_KERNEL); | |
1375 | if (!args) | |
1376 | return -ENOMEM; | |
1377 | ||
1378 | if (copy_from_user(&init, argp, sizeof(init))) { | |
1379 | err = -EFAULT; | |
b49f6d83 | 1380 | goto err; |
d73f71c7 SK |
1381 | } |
1382 | ||
7f1f4812 J |
1383 | if (init.attrs & FASTRPC_MODE_UNSIGNED_MODULE) |
1384 | unsigned_module = true; | |
1385 | ||
1386 | if (is_session_rejected(fl, unsigned_module)) { | |
1387 | err = -ECONNREFUSED; | |
1388 | goto err; | |
1389 | } | |
1390 | ||
d73f71c7 SK |
1391 | if (init.filelen > INIT_FILELEN_MAX) { |
1392 | err = -EINVAL; | |
b49f6d83 | 1393 | goto err; |
d73f71c7 SK |
1394 | } |
1395 | ||
1396 | inbuf.pgid = fl->tgid; | |
1397 | inbuf.namelen = strlen(current->comm) + 1; | |
1398 | inbuf.filelen = init.filelen; | |
1399 | inbuf.pageslen = 1; | |
1400 | inbuf.attrs = init.attrs; | |
1401 | inbuf.siglen = init.siglen; | |
84195d20 | 1402 | fl->pd = USER_PD; |
d73f71c7 SK |
1403 | |
1404 | if (init.filelen && init.filefd) { | |
e90d9119 | 1405 | err = fastrpc_map_create(fl, init.filefd, init.filelen, 0, &map); |
d73f71c7 | 1406 | if (err) |
b49f6d83 | 1407 | goto err; |
d73f71c7 SK |
1408 | } |
1409 | ||
1410 | memlen = ALIGN(max(INIT_FILELEN_MAX, (int)init.filelen * 4), | |
1411 | 1024 * 1024); | |
1412 | err = fastrpc_buf_alloc(fl, fl->sctx->dev, memlen, | |
1413 | &imem); | |
b49f6d83 TE |
1414 | if (err) |
1415 | goto err_alloc; | |
d73f71c7 SK |
1416 | |
1417 | fl->init_mem = imem; | |
1418 | args[0].ptr = (u64)(uintptr_t)&inbuf; | |
1419 | args[0].length = sizeof(inbuf); | |
1420 | args[0].fd = -1; | |
1421 | ||
1422 | args[1].ptr = (u64)(uintptr_t)current->comm; | |
1423 | args[1].length = inbuf.namelen; | |
1424 | args[1].fd = -1; | |
1425 | ||
1426 | args[2].ptr = (u64) init.file; | |
1427 | args[2].length = inbuf.filelen; | |
1428 | args[2].fd = init.filefd; | |
1429 | ||
1430 | pages[0].addr = imem->phys; | |
1431 | pages[0].size = imem->size; | |
1432 | ||
1433 | args[3].ptr = (u64)(uintptr_t) pages; | |
1434 | args[3].length = 1 * sizeof(*pages); | |
1435 | args[3].fd = -1; | |
1436 | ||
1437 | args[4].ptr = (u64)(uintptr_t)&inbuf.attrs; | |
1438 | args[4].length = sizeof(inbuf.attrs); | |
1439 | args[4].fd = -1; | |
1440 | ||
1441 | args[5].ptr = (u64)(uintptr_t) &inbuf.siglen; | |
1442 | args[5].length = sizeof(inbuf.siglen); | |
1443 | args[5].fd = -1; | |
1444 | ||
1445 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE, 4, 0); | |
1446 | if (init.attrs) | |
0b4e32df | 1447 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE_ATTR, 4, 0); |
d73f71c7 SK |
1448 | |
1449 | err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, | |
1450 | sc, args); | |
b49f6d83 TE |
1451 | if (err) |
1452 | goto err_invoke; | |
1453 | ||
1454 | kfree(args); | |
d73f71c7 | 1455 | |
b49f6d83 TE |
1456 | return 0; |
1457 | ||
1458 | err_invoke: | |
1459 | fl->init_mem = NULL; | |
1460 | fastrpc_buf_free(imem); | |
1461 | err_alloc: | |
5bb96c8f | 1462 | fastrpc_map_put(map); |
b49f6d83 | 1463 | err: |
d73f71c7 SK |
1464 | kfree(args); |
1465 | ||
1466 | return err; | |
1467 | } | |
1468 | ||
f6f9279f SK |
1469 | static struct fastrpc_session_ctx *fastrpc_session_alloc( |
1470 | struct fastrpc_channel_ctx *cctx) | |
1471 | { | |
1472 | struct fastrpc_session_ctx *session = NULL; | |
977e6c8d | 1473 | unsigned long flags; |
f6f9279f SK |
1474 | int i; |
1475 | ||
977e6c8d | 1476 | spin_lock_irqsave(&cctx->lock, flags); |
f6f9279f SK |
1477 | for (i = 0; i < cctx->sesscount; i++) { |
1478 | if (!cctx->session[i].used && cctx->session[i].valid) { | |
1479 | cctx->session[i].used = true; | |
1480 | session = &cctx->session[i]; | |
1481 | break; | |
1482 | } | |
1483 | } | |
977e6c8d | 1484 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f SK |
1485 | |
1486 | return session; | |
1487 | } | |
1488 | ||
1489 | static void fastrpc_session_free(struct fastrpc_channel_ctx *cctx, | |
1490 | struct fastrpc_session_ctx *session) | |
1491 | { | |
977e6c8d SK |
1492 | unsigned long flags; |
1493 | ||
1494 | spin_lock_irqsave(&cctx->lock, flags); | |
f6f9279f | 1495 | session->used = false; |
977e6c8d | 1496 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f SK |
1497 | } |
1498 | ||
d73f71c7 SK |
1499 | static int fastrpc_release_current_dsp_process(struct fastrpc_user *fl) |
1500 | { | |
1501 | struct fastrpc_invoke_args args[1]; | |
1502 | int tgid = 0; | |
1503 | u32 sc; | |
1504 | ||
1505 | tgid = fl->tgid; | |
1506 | args[0].ptr = (u64)(uintptr_t) &tgid; | |
1507 | args[0].length = sizeof(tgid); | |
1508 | args[0].fd = -1; | |
d73f71c7 SK |
1509 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_RELEASE, 1, 0); |
1510 | ||
1511 | return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, | |
1512 | sc, &args[0]); | |
1513 | } | |
1514 | ||
f6f9279f SK |
1515 | static int fastrpc_device_release(struct inode *inode, struct file *file) |
1516 | { | |
1517 | struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; | |
1518 | struct fastrpc_channel_ctx *cctx = fl->cctx; | |
c68cfb71 SK |
1519 | struct fastrpc_invoke_ctx *ctx, *n; |
1520 | struct fastrpc_map *map, *m; | |
2419e55e | 1521 | struct fastrpc_buf *buf, *b; |
977e6c8d | 1522 | unsigned long flags; |
f6f9279f | 1523 | |
d73f71c7 SK |
1524 | fastrpc_release_current_dsp_process(fl); |
1525 | ||
977e6c8d | 1526 | spin_lock_irqsave(&cctx->lock, flags); |
f6f9279f | 1527 | list_del(&fl->user); |
977e6c8d | 1528 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f | 1529 | |
c68cfb71 SK |
1530 | if (fl->init_mem) |
1531 | fastrpc_buf_free(fl->init_mem); | |
1532 | ||
1533 | list_for_each_entry_safe(ctx, n, &fl->pending, node) { | |
1534 | list_del(&ctx->node); | |
1535 | fastrpc_context_put(ctx); | |
1536 | } | |
1537 | ||
5bb96c8f | 1538 | list_for_each_entry_safe(map, m, &fl->maps, node) |
c68cfb71 | 1539 | fastrpc_map_put(map); |
c68cfb71 | 1540 | |
2419e55e JRO |
1541 | list_for_each_entry_safe(buf, b, &fl->mmaps, node) { |
1542 | list_del(&buf->node); | |
1543 | fastrpc_buf_free(buf); | |
1544 | } | |
1545 | ||
f6f9279f | 1546 | fastrpc_session_free(cctx, fl->sctx); |
278d56f9 | 1547 | fastrpc_channel_ctx_put(cctx); |
f6f9279f SK |
1548 | |
1549 | mutex_destroy(&fl->mutex); | |
1550 | kfree(fl); | |
1551 | file->private_data = NULL; | |
1552 | ||
1553 | return 0; | |
1554 | } | |
1555 | ||
1556 | static int fastrpc_device_open(struct inode *inode, struct file *filp) | |
1557 | { | |
965602ea SK |
1558 | struct fastrpc_channel_ctx *cctx; |
1559 | struct fastrpc_device *fdevice; | |
f6f9279f | 1560 | struct fastrpc_user *fl = NULL; |
977e6c8d | 1561 | unsigned long flags; |
f6f9279f | 1562 | |
965602ea SK |
1563 | fdevice = miscdev_to_fdevice(filp->private_data); |
1564 | cctx = fdevice->cctx; | |
1565 | ||
f6f9279f SK |
1566 | fl = kzalloc(sizeof(*fl), GFP_KERNEL); |
1567 | if (!fl) | |
1568 | return -ENOMEM; | |
1569 | ||
278d56f9 BA |
1570 | /* Released in fastrpc_device_release() */ |
1571 | fastrpc_channel_ctx_get(cctx); | |
1572 | ||
f6f9279f SK |
1573 | filp->private_data = fl; |
1574 | spin_lock_init(&fl->lock); | |
1575 | mutex_init(&fl->mutex); | |
1576 | INIT_LIST_HEAD(&fl->pending); | |
1577 | INIT_LIST_HEAD(&fl->maps); | |
2419e55e | 1578 | INIT_LIST_HEAD(&fl->mmaps); |
f6f9279f SK |
1579 | INIT_LIST_HEAD(&fl->user); |
1580 | fl->tgid = current->tgid; | |
1581 | fl->cctx = cctx; | |
7f1f4812 | 1582 | fl->is_secure_dev = fdevice->secure; |
7c11df42 TE |
1583 | |
1584 | fl->sctx = fastrpc_session_alloc(cctx); | |
1585 | if (!fl->sctx) { | |
1586 | dev_err(&cctx->rpdev->dev, "No session available\n"); | |
1587 | mutex_destroy(&fl->mutex); | |
1588 | kfree(fl); | |
1589 | ||
1590 | return -EBUSY; | |
1591 | } | |
1592 | ||
977e6c8d | 1593 | spin_lock_irqsave(&cctx->lock, flags); |
f6f9279f | 1594 | list_add_tail(&fl->user, &cctx->users); |
977e6c8d | 1595 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f SK |
1596 | |
1597 | return 0; | |
1598 | } | |
1599 | ||
6cffd795 SK |
1600 | static int fastrpc_dmabuf_alloc(struct fastrpc_user *fl, char __user *argp) |
1601 | { | |
1602 | struct fastrpc_alloc_dma_buf bp; | |
1603 | DEFINE_DMA_BUF_EXPORT_INFO(exp_info); | |
1604 | struct fastrpc_buf *buf = NULL; | |
1605 | int err; | |
1606 | ||
1607 | if (copy_from_user(&bp, argp, sizeof(bp))) | |
1608 | return -EFAULT; | |
1609 | ||
1610 | err = fastrpc_buf_alloc(fl, fl->sctx->dev, bp.size, &buf); | |
1611 | if (err) | |
1612 | return err; | |
1613 | exp_info.ops = &fastrpc_dma_buf_ops; | |
1614 | exp_info.size = bp.size; | |
1615 | exp_info.flags = O_RDWR; | |
1616 | exp_info.priv = buf; | |
1617 | buf->dmabuf = dma_buf_export(&exp_info); | |
1618 | if (IS_ERR(buf->dmabuf)) { | |
1619 | err = PTR_ERR(buf->dmabuf); | |
1620 | fastrpc_buf_free(buf); | |
1621 | return err; | |
1622 | } | |
1623 | ||
1624 | bp.fd = dma_buf_fd(buf->dmabuf, O_ACCMODE); | |
1625 | if (bp.fd < 0) { | |
1626 | dma_buf_put(buf->dmabuf); | |
1627 | return -EINVAL; | |
1628 | } | |
1629 | ||
1630 | if (copy_to_user(argp, &bp, sizeof(bp))) { | |
46963e2e MK |
1631 | /* |
1632 | * The usercopy failed, but we can't do much about it, as | |
1633 | * dma_buf_fd() already called fd_install() and made the | |
1634 | * file descriptor accessible for the current process. It | |
1635 | * might already be closed and dmabuf no longer valid when | |
1636 | * we reach this point. Therefore "leak" the fd and rely on | |
1637 | * the process exit path to do any required cleanup. | |
1638 | */ | |
6cffd795 SK |
1639 | return -EFAULT; |
1640 | } | |
1641 | ||
6cffd795 SK |
1642 | return 0; |
1643 | } | |
1644 | ||
6010d9be | 1645 | static int fastrpc_init_attach(struct fastrpc_user *fl, int pd) |
d73f71c7 SK |
1646 | { |
1647 | struct fastrpc_invoke_args args[1]; | |
1648 | int tgid = fl->tgid; | |
1649 | u32 sc; | |
1650 | ||
1651 | args[0].ptr = (u64)(uintptr_t) &tgid; | |
1652 | args[0].length = sizeof(tgid); | |
1653 | args[0].fd = -1; | |
d73f71c7 | 1654 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_ATTACH, 1, 0); |
6010d9be | 1655 | fl->pd = pd; |
d73f71c7 SK |
1656 | |
1657 | return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, | |
1658 | sc, &args[0]); | |
1659 | } | |
1660 | ||
c68cfb71 SK |
1661 | static int fastrpc_invoke(struct fastrpc_user *fl, char __user *argp) |
1662 | { | |
1663 | struct fastrpc_invoke_args *args = NULL; | |
1664 | struct fastrpc_invoke inv; | |
1665 | u32 nscalars; | |
1666 | int err; | |
1667 | ||
1668 | if (copy_from_user(&inv, argp, sizeof(inv))) | |
1669 | return -EFAULT; | |
1670 | ||
1671 | /* nscalars is truncated here to max supported value */ | |
1672 | nscalars = REMOTE_SCALARS_LENGTH(inv.sc); | |
1673 | if (nscalars) { | |
1674 | args = kcalloc(nscalars, sizeof(*args), GFP_KERNEL); | |
1675 | if (!args) | |
1676 | return -ENOMEM; | |
1677 | ||
1678 | if (copy_from_user(args, (void __user *)(uintptr_t)inv.args, | |
1679 | nscalars * sizeof(*args))) { | |
1680 | kfree(args); | |
1681 | return -EFAULT; | |
1682 | } | |
1683 | } | |
1684 | ||
1685 | err = fastrpc_internal_invoke(fl, false, inv.handle, inv.sc, args); | |
1686 | kfree(args); | |
1687 | ||
1688 | return err; | |
1689 | } | |
1690 | ||
6c16fd8b J |
1691 | static int fastrpc_get_info_from_dsp(struct fastrpc_user *fl, uint32_t *dsp_attr_buf, |
1692 | uint32_t dsp_attr_buf_len) | |
1693 | { | |
1694 | struct fastrpc_invoke_args args[2] = { 0 }; | |
1695 | ||
1696 | /* Capability filled in userspace */ | |
1697 | dsp_attr_buf[0] = 0; | |
1698 | ||
1699 | args[0].ptr = (u64)(uintptr_t)&dsp_attr_buf_len; | |
1700 | args[0].length = sizeof(dsp_attr_buf_len); | |
1701 | args[0].fd = -1; | |
1702 | args[1].ptr = (u64)(uintptr_t)&dsp_attr_buf[1]; | |
1703 | args[1].length = dsp_attr_buf_len; | |
1704 | args[1].fd = -1; | |
f667f56b | 1705 | fl->pd = USER_PD; |
6c16fd8b J |
1706 | |
1707 | return fastrpc_internal_invoke(fl, true, FASTRPC_DSP_UTILITIES_HANDLE, | |
1708 | FASTRPC_SCALARS(0, 1, 1), args); | |
1709 | } | |
1710 | ||
1711 | static int fastrpc_get_info_from_kernel(struct fastrpc_ioctl_capability *cap, | |
1712 | struct fastrpc_user *fl) | |
1713 | { | |
1714 | struct fastrpc_channel_ctx *cctx = fl->cctx; | |
1715 | uint32_t attribute_id = cap->attribute_id; | |
1716 | uint32_t *dsp_attributes; | |
1717 | unsigned long flags; | |
1718 | uint32_t domain = cap->domain; | |
1719 | int err; | |
1720 | ||
1721 | spin_lock_irqsave(&cctx->lock, flags); | |
1722 | /* check if we already have queried dsp for attributes */ | |
1723 | if (cctx->valid_attributes) { | |
1724 | spin_unlock_irqrestore(&cctx->lock, flags); | |
1725 | goto done; | |
1726 | } | |
1727 | spin_unlock_irqrestore(&cctx->lock, flags); | |
1728 | ||
1729 | dsp_attributes = kzalloc(FASTRPC_MAX_DSP_ATTRIBUTES_LEN, GFP_KERNEL); | |
1730 | if (!dsp_attributes) | |
1731 | return -ENOMEM; | |
1732 | ||
1733 | err = fastrpc_get_info_from_dsp(fl, dsp_attributes, FASTRPC_MAX_DSP_ATTRIBUTES_LEN); | |
1734 | if (err == DSP_UNSUPPORTED_API) { | |
1735 | dev_info(&cctx->rpdev->dev, | |
1736 | "Warning: DSP capabilities not supported on domain: %d\n", domain); | |
1737 | kfree(dsp_attributes); | |
1738 | return -EOPNOTSUPP; | |
1739 | } else if (err) { | |
1740 | dev_err(&cctx->rpdev->dev, "Error: dsp information is incorrect err: %d\n", err); | |
1741 | kfree(dsp_attributes); | |
1742 | return err; | |
1743 | } | |
1744 | ||
1745 | spin_lock_irqsave(&cctx->lock, flags); | |
1746 | memcpy(cctx->dsp_attributes, dsp_attributes, FASTRPC_MAX_DSP_ATTRIBUTES_LEN); | |
1747 | cctx->valid_attributes = true; | |
1748 | spin_unlock_irqrestore(&cctx->lock, flags); | |
1749 | kfree(dsp_attributes); | |
1750 | done: | |
1751 | cap->capability = cctx->dsp_attributes[attribute_id]; | |
1752 | return 0; | |
1753 | } | |
1754 | ||
1755 | static int fastrpc_get_dsp_info(struct fastrpc_user *fl, char __user *argp) | |
1756 | { | |
1757 | struct fastrpc_ioctl_capability cap = {0}; | |
1758 | int err = 0; | |
1759 | ||
1760 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
1761 | return -EFAULT; | |
1762 | ||
1763 | cap.capability = 0; | |
1764 | if (cap.domain >= FASTRPC_DEV_MAX) { | |
1765 | dev_err(&fl->cctx->rpdev->dev, "Error: Invalid domain id:%d, err:%d\n", | |
1766 | cap.domain, err); | |
1767 | return -ECHRNG; | |
1768 | } | |
1769 | ||
1770 | /* Fastrpc Capablities does not support modem domain */ | |
1771 | if (cap.domain == MDSP_DOMAIN_ID) { | |
1772 | dev_err(&fl->cctx->rpdev->dev, "Error: modem not supported %d\n", err); | |
1773 | return -ECHRNG; | |
1774 | } | |
1775 | ||
1776 | if (cap.attribute_id >= FASTRPC_MAX_DSP_ATTRIBUTES) { | |
1777 | dev_err(&fl->cctx->rpdev->dev, "Error: invalid attribute: %d, err: %d\n", | |
1778 | cap.attribute_id, err); | |
1779 | return -EOVERFLOW; | |
1780 | } | |
1781 | ||
1782 | err = fastrpc_get_info_from_kernel(&cap, fl); | |
1783 | if (err) | |
1784 | return err; | |
1785 | ||
1786 | if (copy_to_user(argp, &cap.capability, sizeof(cap.capability))) | |
1787 | return -EFAULT; | |
1788 | ||
1789 | return 0; | |
1790 | } | |
1791 | ||
72fa6f78 | 1792 | static int fastrpc_req_munmap_impl(struct fastrpc_user *fl, struct fastrpc_buf *buf) |
2419e55e JRO |
1793 | { |
1794 | struct fastrpc_invoke_args args[1] = { [0] = { 0 } }; | |
2419e55e JRO |
1795 | struct fastrpc_munmap_req_msg req_msg; |
1796 | struct device *dev = fl->sctx->dev; | |
1797 | int err; | |
1798 | u32 sc; | |
1799 | ||
2419e55e JRO |
1800 | req_msg.pgid = fl->tgid; |
1801 | req_msg.size = buf->size; | |
1802 | req_msg.vaddr = buf->raddr; | |
1803 | ||
1804 | args[0].ptr = (u64) (uintptr_t) &req_msg; | |
1805 | args[0].length = sizeof(req_msg); | |
1806 | ||
1807 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MUNMAP, 1, 0); | |
1808 | err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, | |
1809 | &args[0]); | |
1810 | if (!err) { | |
1811 | dev_dbg(dev, "unmmap\tpt 0x%09lx OK\n", buf->raddr); | |
1812 | spin_lock(&fl->lock); | |
1813 | list_del(&buf->node); | |
1814 | spin_unlock(&fl->lock); | |
1815 | fastrpc_buf_free(buf); | |
1816 | } else { | |
1817 | dev_err(dev, "unmmap\tpt 0x%09lx ERROR\n", buf->raddr); | |
1818 | } | |
1819 | ||
1820 | return err; | |
1821 | } | |
1822 | ||
1823 | static int fastrpc_req_munmap(struct fastrpc_user *fl, char __user *argp) | |
1824 | { | |
72fa6f78 | 1825 | struct fastrpc_buf *buf = NULL, *iter, *b; |
2419e55e | 1826 | struct fastrpc_req_munmap req; |
72fa6f78 | 1827 | struct device *dev = fl->sctx->dev; |
2419e55e JRO |
1828 | |
1829 | if (copy_from_user(&req, argp, sizeof(req))) | |
1830 | return -EFAULT; | |
1831 | ||
72fa6f78 AV |
1832 | spin_lock(&fl->lock); |
1833 | list_for_each_entry_safe(iter, b, &fl->mmaps, node) { | |
1834 | if ((iter->raddr == req.vaddrout) && (iter->size == req.size)) { | |
1835 | buf = iter; | |
1836 | break; | |
1837 | } | |
1838 | } | |
1839 | spin_unlock(&fl->lock); | |
1840 | ||
1841 | if (!buf) { | |
1842 | dev_err(dev, "mmap\t\tpt 0x%09llx [len 0x%08llx] not in list\n", | |
1843 | req.vaddrout, req.size); | |
1844 | return -EINVAL; | |
1845 | } | |
1846 | ||
1847 | return fastrpc_req_munmap_impl(fl, buf); | |
2419e55e JRO |
1848 | } |
1849 | ||
1850 | static int fastrpc_req_mmap(struct fastrpc_user *fl, char __user *argp) | |
1851 | { | |
1852 | struct fastrpc_invoke_args args[3] = { [0 ... 2] = { 0 } }; | |
1853 | struct fastrpc_buf *buf = NULL; | |
1854 | struct fastrpc_mmap_req_msg req_msg; | |
1855 | struct fastrpc_mmap_rsp_msg rsp_msg; | |
2419e55e JRO |
1856 | struct fastrpc_phy_page pages; |
1857 | struct fastrpc_req_mmap req; | |
1858 | struct device *dev = fl->sctx->dev; | |
1859 | int err; | |
1860 | u32 sc; | |
1861 | ||
1862 | if (copy_from_user(&req, argp, sizeof(req))) | |
1863 | return -EFAULT; | |
1864 | ||
532ad70c | 1865 | if (req.flags != ADSP_MMAP_ADD_PAGES && req.flags != ADSP_MMAP_REMOTE_HEAP_ADDR) { |
2419e55e | 1866 | dev_err(dev, "flag not supported 0x%x\n", req.flags); |
532ad70c | 1867 | |
2419e55e JRO |
1868 | return -EINVAL; |
1869 | } | |
1870 | ||
1871 | if (req.vaddrin) { | |
1872 | dev_err(dev, "adding user allocated pages is not supported\n"); | |
1873 | return -EINVAL; | |
1874 | } | |
1875 | ||
ada6c2d9 EG |
1876 | if (req.flags == ADSP_MMAP_REMOTE_HEAP_ADDR) |
1877 | err = fastrpc_remote_heap_alloc(fl, dev, req.size, &buf); | |
1878 | else | |
1879 | err = fastrpc_buf_alloc(fl, dev, req.size, &buf); | |
1880 | ||
2419e55e JRO |
1881 | if (err) { |
1882 | dev_err(dev, "failed to allocate buffer\n"); | |
1883 | return err; | |
1884 | } | |
1885 | ||
1886 | req_msg.pgid = fl->tgid; | |
1887 | req_msg.flags = req.flags; | |
1888 | req_msg.vaddr = req.vaddrin; | |
1889 | req_msg.num = sizeof(pages); | |
1890 | ||
1891 | args[0].ptr = (u64) (uintptr_t) &req_msg; | |
1892 | args[0].length = sizeof(req_msg); | |
1893 | ||
1894 | pages.addr = buf->phys; | |
1895 | pages.size = buf->size; | |
1896 | ||
1897 | args[1].ptr = (u64) (uintptr_t) &pages; | |
1898 | args[1].length = sizeof(pages); | |
1899 | ||
1900 | args[2].ptr = (u64) (uintptr_t) &rsp_msg; | |
1901 | args[2].length = sizeof(rsp_msg); | |
1902 | ||
1903 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MMAP, 2, 1); | |
1904 | err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, | |
1905 | &args[0]); | |
1906 | if (err) { | |
1907 | dev_err(dev, "mmap error (len 0x%08llx)\n", buf->size); | |
1908 | goto err_invoke; | |
1909 | } | |
1910 | ||
1911 | /* update the buffer to be able to deallocate the memory on the DSP */ | |
1912 | buf->raddr = (uintptr_t) rsp_msg.vaddr; | |
1913 | ||
1914 | /* let the client know the address to use */ | |
1915 | req.vaddrout = rsp_msg.vaddr; | |
1916 | ||
532ad70c | 1917 | /* Add memory to static PD pool, protection thru hypervisor */ |
3c7d0079 | 1918 | if (req.flags == ADSP_MMAP_REMOTE_HEAP_ADDR && fl->cctx->vmcount) { |
a283d7f1 EG |
1919 | u64 src_perms = BIT(QCOM_SCM_VMID_HLOS); |
1920 | ||
ada6c2d9 | 1921 | err = qcom_scm_assign_mem(buf->phys, (u64)buf->size, |
a283d7f1 | 1922 | &src_perms, fl->cctx->vmperms, fl->cctx->vmcount); |
532ad70c AV |
1923 | if (err) { |
1924 | dev_err(fl->sctx->dev, "Failed to assign memory phys 0x%llx size 0x%llx err %d", | |
1925 | buf->phys, buf->size, err); | |
1926 | goto err_assign; | |
1927 | } | |
1928 | } | |
1929 | ||
2419e55e JRO |
1930 | spin_lock(&fl->lock); |
1931 | list_add_tail(&buf->node, &fl->mmaps); | |
1932 | spin_unlock(&fl->lock); | |
1933 | ||
1934 | if (copy_to_user((void __user *)argp, &req, sizeof(req))) { | |
72fa6f78 AV |
1935 | err = -EFAULT; |
1936 | goto err_assign; | |
2419e55e JRO |
1937 | } |
1938 | ||
1939 | dev_dbg(dev, "mmap\t\tpt 0x%09lx OK [len 0x%08llx]\n", | |
1940 | buf->raddr, buf->size); | |
1941 | ||
1942 | return 0; | |
1943 | ||
72fa6f78 AV |
1944 | err_assign: |
1945 | fastrpc_req_munmap_impl(fl, buf); | |
2419e55e JRO |
1946 | err_invoke: |
1947 | fastrpc_buf_free(buf); | |
1948 | ||
1949 | return err; | |
1950 | } | |
1951 | ||
5c1b97c7 J |
1952 | static int fastrpc_req_mem_unmap_impl(struct fastrpc_user *fl, struct fastrpc_mem_unmap *req) |
1953 | { | |
1954 | struct fastrpc_invoke_args args[1] = { [0] = { 0 } }; | |
c5c07c59 | 1955 | struct fastrpc_map *map = NULL, *iter, *m; |
5c1b97c7 J |
1956 | struct fastrpc_mem_unmap_req_msg req_msg = { 0 }; |
1957 | int err = 0; | |
1958 | u32 sc; | |
1959 | struct device *dev = fl->sctx->dev; | |
1960 | ||
1961 | spin_lock(&fl->lock); | |
c5c07c59 SK |
1962 | list_for_each_entry_safe(iter, m, &fl->maps, node) { |
1963 | if ((req->fd < 0 || iter->fd == req->fd) && (iter->raddr == req->vaddr)) { | |
1964 | map = iter; | |
5c1b97c7 | 1965 | break; |
c5c07c59 | 1966 | } |
5c1b97c7 J |
1967 | } |
1968 | ||
1969 | spin_unlock(&fl->lock); | |
1970 | ||
1971 | if (!map) { | |
1972 | dev_err(dev, "map not in list\n"); | |
1973 | return -EINVAL; | |
1974 | } | |
1975 | ||
1976 | req_msg.pgid = fl->tgid; | |
1977 | req_msg.len = map->len; | |
1978 | req_msg.vaddrin = map->raddr; | |
1979 | req_msg.fd = map->fd; | |
1980 | ||
1981 | args[0].ptr = (u64) (uintptr_t) &req_msg; | |
1982 | args[0].length = sizeof(req_msg); | |
1983 | ||
1984 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MEM_UNMAP, 1, 0); | |
1985 | err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, | |
1986 | &args[0]); | |
50914338 | 1987 | if (err) { |
5c1b97c7 | 1988 | dev_err(dev, "unmmap\tpt fd = %d, 0x%09llx error\n", map->fd, map->raddr); |
50914338 EG |
1989 | return err; |
1990 | } | |
1991 | fastrpc_map_put(map); | |
5c1b97c7 | 1992 | |
50914338 | 1993 | return 0; |
5c1b97c7 J |
1994 | } |
1995 | ||
1996 | static int fastrpc_req_mem_unmap(struct fastrpc_user *fl, char __user *argp) | |
1997 | { | |
1998 | struct fastrpc_mem_unmap req; | |
1999 | ||
2000 | if (copy_from_user(&req, argp, sizeof(req))) | |
2001 | return -EFAULT; | |
2002 | ||
2003 | return fastrpc_req_mem_unmap_impl(fl, &req); | |
2004 | } | |
2005 | ||
2006 | static int fastrpc_req_mem_map(struct fastrpc_user *fl, char __user *argp) | |
2007 | { | |
2008 | struct fastrpc_invoke_args args[4] = { [0 ... 3] = { 0 } }; | |
2009 | struct fastrpc_mem_map_req_msg req_msg = { 0 }; | |
2010 | struct fastrpc_mmap_rsp_msg rsp_msg = { 0 }; | |
2011 | struct fastrpc_mem_unmap req_unmap = { 0 }; | |
2012 | struct fastrpc_phy_page pages = { 0 }; | |
2013 | struct fastrpc_mem_map req; | |
2014 | struct device *dev = fl->sctx->dev; | |
2015 | struct fastrpc_map *map = NULL; | |
2016 | int err; | |
2017 | u32 sc; | |
2018 | ||
2019 | if (copy_from_user(&req, argp, sizeof(req))) | |
2020 | return -EFAULT; | |
2021 | ||
2022 | /* create SMMU mapping */ | |
3abe3ab3 | 2023 | err = fastrpc_map_create(fl, req.fd, req.length, 0, &map); |
5c1b97c7 J |
2024 | if (err) { |
2025 | dev_err(dev, "failed to map buffer, fd = %d\n", req.fd); | |
2026 | return err; | |
2027 | } | |
2028 | ||
2029 | req_msg.pgid = fl->tgid; | |
2030 | req_msg.fd = req.fd; | |
2031 | req_msg.offset = req.offset; | |
2032 | req_msg.vaddrin = req.vaddrin; | |
2033 | map->va = (void *) (uintptr_t) req.vaddrin; | |
2034 | req_msg.flags = req.flags; | |
2035 | req_msg.num = sizeof(pages); | |
2036 | req_msg.data_len = 0; | |
2037 | ||
2038 | args[0].ptr = (u64) (uintptr_t) &req_msg; | |
2039 | args[0].length = sizeof(req_msg); | |
2040 | ||
2041 | pages.addr = map->phys; | |
2042 | pages.size = map->size; | |
2043 | ||
2044 | args[1].ptr = (u64) (uintptr_t) &pages; | |
2045 | args[1].length = sizeof(pages); | |
2046 | ||
2047 | args[2].ptr = (u64) (uintptr_t) &pages; | |
2048 | args[2].length = 0; | |
2049 | ||
2050 | args[3].ptr = (u64) (uintptr_t) &rsp_msg; | |
2051 | args[3].length = sizeof(rsp_msg); | |
2052 | ||
2053 | sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MEM_MAP, 3, 1); | |
2054 | err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, &args[0]); | |
2055 | if (err) { | |
2056 | dev_err(dev, "mem mmap error, fd %d, vaddr %llx, size %lld\n", | |
2057 | req.fd, req.vaddrin, map->size); | |
2058 | goto err_invoke; | |
2059 | } | |
2060 | ||
2061 | /* update the buffer to be able to deallocate the memory on the DSP */ | |
2062 | map->raddr = rsp_msg.vaddr; | |
2063 | ||
2064 | /* let the client know the address to use */ | |
2065 | req.vaddrout = rsp_msg.vaddr; | |
2066 | ||
2067 | if (copy_to_user((void __user *)argp, &req, sizeof(req))) { | |
2068 | /* unmap the memory and release the buffer */ | |
2069 | req_unmap.vaddr = (uintptr_t) rsp_msg.vaddr; | |
2070 | req_unmap.length = map->size; | |
2071 | fastrpc_req_mem_unmap_impl(fl, &req_unmap); | |
2072 | return -EFAULT; | |
2073 | } | |
2074 | ||
2075 | return 0; | |
2076 | ||
2077 | err_invoke: | |
2078 | fastrpc_map_put(map); | |
2079 | ||
2080 | return err; | |
2081 | } | |
2082 | ||
c68cfb71 SK |
2083 | static long fastrpc_device_ioctl(struct file *file, unsigned int cmd, |
2084 | unsigned long arg) | |
2085 | { | |
2086 | struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; | |
2087 | char __user *argp = (char __user *)arg; | |
2088 | int err; | |
2089 | ||
2090 | switch (cmd) { | |
2091 | case FASTRPC_IOCTL_INVOKE: | |
2092 | err = fastrpc_invoke(fl, argp); | |
2093 | break; | |
d73f71c7 | 2094 | case FASTRPC_IOCTL_INIT_ATTACH: |
1959ab9e | 2095 | err = fastrpc_init_attach(fl, ROOT_PD); |
6010d9be JM |
2096 | break; |
2097 | case FASTRPC_IOCTL_INIT_ATTACH_SNS: | |
2098 | err = fastrpc_init_attach(fl, SENSORS_PD); | |
d73f71c7 | 2099 | break; |
08715610 AV |
2100 | case FASTRPC_IOCTL_INIT_CREATE_STATIC: |
2101 | err = fastrpc_init_create_static_process(fl, argp); | |
2102 | break; | |
d73f71c7 SK |
2103 | case FASTRPC_IOCTL_INIT_CREATE: |
2104 | err = fastrpc_init_create_process(fl, argp); | |
2105 | break; | |
6cffd795 SK |
2106 | case FASTRPC_IOCTL_ALLOC_DMA_BUFF: |
2107 | err = fastrpc_dmabuf_alloc(fl, argp); | |
2108 | break; | |
2419e55e JRO |
2109 | case FASTRPC_IOCTL_MMAP: |
2110 | err = fastrpc_req_mmap(fl, argp); | |
2111 | break; | |
2112 | case FASTRPC_IOCTL_MUNMAP: | |
2113 | err = fastrpc_req_munmap(fl, argp); | |
2114 | break; | |
5c1b97c7 J |
2115 | case FASTRPC_IOCTL_MEM_MAP: |
2116 | err = fastrpc_req_mem_map(fl, argp); | |
2117 | break; | |
2118 | case FASTRPC_IOCTL_MEM_UNMAP: | |
2119 | err = fastrpc_req_mem_unmap(fl, argp); | |
2120 | break; | |
6c16fd8b J |
2121 | case FASTRPC_IOCTL_GET_DSP_INFO: |
2122 | err = fastrpc_get_dsp_info(fl, argp); | |
2123 | break; | |
c68cfb71 SK |
2124 | default: |
2125 | err = -ENOTTY; | |
2126 | break; | |
2127 | } | |
2128 | ||
2129 | return err; | |
2130 | } | |
2131 | ||
f6f9279f SK |
2132 | static const struct file_operations fastrpc_fops = { |
2133 | .open = fastrpc_device_open, | |
2134 | .release = fastrpc_device_release, | |
c68cfb71 SK |
2135 | .unlocked_ioctl = fastrpc_device_ioctl, |
2136 | .compat_ioctl = fastrpc_device_ioctl, | |
f6f9279f SK |
2137 | }; |
2138 | ||
2139 | static int fastrpc_cb_probe(struct platform_device *pdev) | |
2140 | { | |
2141 | struct fastrpc_channel_ctx *cctx; | |
2142 | struct fastrpc_session_ctx *sess; | |
2143 | struct device *dev = &pdev->dev; | |
2144 | int i, sessions = 0; | |
977e6c8d | 2145 | unsigned long flags; |
01b76c32 | 2146 | int rc; |
f6f9279f SK |
2147 | |
2148 | cctx = dev_get_drvdata(dev->parent); | |
2149 | if (!cctx) | |
2150 | return -EINVAL; | |
2151 | ||
2152 | of_property_read_u32(dev->of_node, "qcom,nsessions", &sessions); | |
2153 | ||
977e6c8d | 2154 | spin_lock_irqsave(&cctx->lock, flags); |
9baa1415 JH |
2155 | if (cctx->sesscount >= FASTRPC_MAX_SESSIONS) { |
2156 | dev_err(&pdev->dev, "too many sessions\n"); | |
2157 | spin_unlock_irqrestore(&cctx->lock, flags); | |
2158 | return -ENOSPC; | |
2159 | } | |
d245f43a | 2160 | sess = &cctx->session[cctx->sesscount++]; |
f6f9279f SK |
2161 | sess->used = false; |
2162 | sess->valid = true; | |
2163 | sess->dev = dev; | |
2164 | dev_set_drvdata(dev, sess); | |
2165 | ||
2166 | if (of_property_read_u32(dev->of_node, "reg", &sess->sid)) | |
2167 | dev_info(dev, "FastRPC Session ID not specified in DT\n"); | |
2168 | ||
2169 | if (sessions > 0) { | |
2170 | struct fastrpc_session_ctx *dup_sess; | |
2171 | ||
2172 | for (i = 1; i < sessions; i++) { | |
d245f43a | 2173 | if (cctx->sesscount >= FASTRPC_MAX_SESSIONS) |
f6f9279f | 2174 | break; |
d245f43a | 2175 | dup_sess = &cctx->session[cctx->sesscount++]; |
f6f9279f SK |
2176 | memcpy(dup_sess, sess, sizeof(*dup_sess)); |
2177 | } | |
2178 | } | |
977e6c8d | 2179 | spin_unlock_irqrestore(&cctx->lock, flags); |
01b76c32 BY |
2180 | rc = dma_set_mask(dev, DMA_BIT_MASK(32)); |
2181 | if (rc) { | |
2182 | dev_err(dev, "32-bit DMA enable failed\n"); | |
2183 | return rc; | |
2184 | } | |
f6f9279f SK |
2185 | |
2186 | return 0; | |
2187 | } | |
2188 | ||
2189 | static int fastrpc_cb_remove(struct platform_device *pdev) | |
2190 | { | |
2191 | struct fastrpc_channel_ctx *cctx = dev_get_drvdata(pdev->dev.parent); | |
2192 | struct fastrpc_session_ctx *sess = dev_get_drvdata(&pdev->dev); | |
977e6c8d | 2193 | unsigned long flags; |
f6f9279f SK |
2194 | int i; |
2195 | ||
977e6c8d | 2196 | spin_lock_irqsave(&cctx->lock, flags); |
a4e61de6 | 2197 | for (i = 0; i < FASTRPC_MAX_SESSIONS; i++) { |
f6f9279f SK |
2198 | if (cctx->session[i].sid == sess->sid) { |
2199 | cctx->session[i].valid = false; | |
2200 | cctx->sesscount--; | |
2201 | } | |
2202 | } | |
977e6c8d | 2203 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f SK |
2204 | |
2205 | return 0; | |
2206 | } | |
2207 | ||
2208 | static const struct of_device_id fastrpc_match_table[] = { | |
2209 | { .compatible = "qcom,fastrpc-compute-cb", }, | |
2210 | {} | |
2211 | }; | |
2212 | ||
2213 | static struct platform_driver fastrpc_cb_driver = { | |
2214 | .probe = fastrpc_cb_probe, | |
2215 | .remove = fastrpc_cb_remove, | |
2216 | .driver = { | |
2217 | .name = "qcom,fastrpc-cb", | |
2218 | .of_match_table = fastrpc_match_table, | |
2219 | .suppress_bind_attrs = true, | |
2220 | }, | |
2221 | }; | |
2222 | ||
965602ea | 2223 | static int fastrpc_device_register(struct device *dev, struct fastrpc_channel_ctx *cctx, |
3abe3ab3 | 2224 | bool is_secured, const char *domain) |
965602ea SK |
2225 | { |
2226 | struct fastrpc_device *fdev; | |
2227 | int err; | |
2228 | ||
2229 | fdev = devm_kzalloc(dev, sizeof(*fdev), GFP_KERNEL); | |
2230 | if (!fdev) | |
2231 | return -ENOMEM; | |
2232 | ||
3abe3ab3 | 2233 | fdev->secure = is_secured; |
965602ea SK |
2234 | fdev->cctx = cctx; |
2235 | fdev->miscdev.minor = MISC_DYNAMIC_MINOR; | |
2236 | fdev->miscdev.fops = &fastrpc_fops; | |
3abe3ab3 SK |
2237 | fdev->miscdev.name = devm_kasprintf(dev, GFP_KERNEL, "fastrpc-%s%s", |
2238 | domain, is_secured ? "-secure" : ""); | |
af2e19d8 CB |
2239 | if (!fdev->miscdev.name) |
2240 | return -ENOMEM; | |
2241 | ||
965602ea | 2242 | err = misc_register(&fdev->miscdev); |
3abe3ab3 SK |
2243 | if (!err) { |
2244 | if (is_secured) | |
2245 | cctx->secure_fdevice = fdev; | |
2246 | else | |
2247 | cctx->fdevice = fdev; | |
2248 | } | |
965602ea SK |
2249 | |
2250 | return err; | |
2251 | } | |
2252 | ||
f6f9279f SK |
2253 | static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev) |
2254 | { | |
2255 | struct device *rdev = &rpdev->dev; | |
2256 | struct fastrpc_channel_ctx *data; | |
e90d9119 | 2257 | int i, err, domain_id = -1, vmcount; |
f6f9279f | 2258 | const char *domain; |
3abe3ab3 | 2259 | bool secure_dsp; |
e90d9119 | 2260 | unsigned int vmids[FASTRPC_MAX_VMIDS]; |
f6f9279f | 2261 | |
f6f9279f SK |
2262 | err = of_property_read_string(rdev->of_node, "label", &domain); |
2263 | if (err) { | |
2264 | dev_info(rdev, "FastRPC Domain not specified in DT\n"); | |
2265 | return err; | |
2266 | } | |
2267 | ||
2268 | for (i = 0; i <= CDSP_DOMAIN_ID; i++) { | |
2269 | if (!strcmp(domains[i], domain)) { | |
2270 | domain_id = i; | |
2271 | break; | |
2272 | } | |
2273 | } | |
2274 | ||
2275 | if (domain_id < 0) { | |
2276 | dev_info(rdev, "FastRPC Invalid Domain ID %d\n", domain_id); | |
2277 | return -EINVAL; | |
2278 | } | |
2279 | ||
1ce91d45 AV |
2280 | if (of_reserved_mem_device_init_by_idx(rdev, rdev->of_node, 0)) |
2281 | dev_info(rdev, "no reserved DMA memory for FASTRPC\n"); | |
2282 | ||
e90d9119 VKG |
2283 | vmcount = of_property_read_variable_u32_array(rdev->of_node, |
2284 | "qcom,vmids", &vmids[0], 0, FASTRPC_MAX_VMIDS); | |
2285 | if (vmcount < 0) | |
2286 | vmcount = 0; | |
2287 | else if (!qcom_scm_is_available()) | |
2288 | return -EPROBE_DEFER; | |
2289 | ||
278d56f9 BA |
2290 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
2291 | if (!data) | |
2292 | return -ENOMEM; | |
2293 | ||
e90d9119 VKG |
2294 | if (vmcount) { |
2295 | data->vmcount = vmcount; | |
e90d9119 VKG |
2296 | for (i = 0; i < data->vmcount; i++) { |
2297 | data->vmperms[i].vmid = vmids[i]; | |
2298 | data->vmperms[i].perm = QCOM_SCM_PERM_RWX; | |
2299 | } | |
2300 | } | |
3abe3ab3 SK |
2301 | |
2302 | secure_dsp = !(of_property_read_bool(rdev->of_node, "qcom,non-secure-domain")); | |
2303 | data->secure = secure_dsp; | |
2304 | ||
2305 | switch (domain_id) { | |
2306 | case ADSP_DOMAIN_ID: | |
2307 | case MDSP_DOMAIN_ID: | |
2308 | case SDSP_DOMAIN_ID: | |
7f1f4812 J |
2309 | /* Unsigned PD offloading is only supported on CDSP*/ |
2310 | data->unsigned_support = false; | |
3abe3ab3 SK |
2311 | err = fastrpc_device_register(rdev, data, secure_dsp, domains[domain_id]); |
2312 | if (err) | |
2313 | goto fdev_error; | |
2314 | break; | |
2315 | case CDSP_DOMAIN_ID: | |
7f1f4812 | 2316 | data->unsigned_support = true; |
3abe3ab3 SK |
2317 | /* Create both device nodes so that we can allow both Signed and Unsigned PD */ |
2318 | err = fastrpc_device_register(rdev, data, true, domains[domain_id]); | |
2319 | if (err) | |
2320 | goto fdev_error; | |
2321 | ||
2322 | err = fastrpc_device_register(rdev, data, false, domains[domain_id]); | |
2323 | if (err) | |
2324 | goto fdev_error; | |
2325 | break; | |
2326 | default: | |
2327 | err = -EINVAL; | |
2328 | goto fdev_error; | |
0978de9f | 2329 | } |
f6f9279f | 2330 | |
278d56f9 BA |
2331 | kref_init(&data->refcount); |
2332 | ||
f6f9279f | 2333 | dev_set_drvdata(&rpdev->dev, data); |
9bde43a0 | 2334 | rdev->dma_mask = &data->dma_mask; |
f6f9279f SK |
2335 | dma_set_mask_and_coherent(rdev, DMA_BIT_MASK(32)); |
2336 | INIT_LIST_HEAD(&data->users); | |
76e8e4ac | 2337 | INIT_LIST_HEAD(&data->invoke_interrupted_mmaps); |
f6f9279f SK |
2338 | spin_lock_init(&data->lock); |
2339 | idr_init(&data->ctx_idr); | |
2340 | data->domain_id = domain_id; | |
2341 | data->rpdev = rpdev; | |
2342 | ||
11819ed2 CJ |
2343 | err = of_platform_populate(rdev->of_node, NULL, NULL, rdev); |
2344 | if (err) | |
2345 | goto populate_error; | |
2346 | ||
2347 | return 0; | |
2348 | ||
2349 | populate_error: | |
2350 | if (data->fdevice) | |
2351 | misc_deregister(&data->fdevice->miscdev); | |
2352 | if (data->secure_fdevice) | |
2353 | misc_deregister(&data->secure_fdevice->miscdev); | |
2354 | ||
3abe3ab3 SK |
2355 | fdev_error: |
2356 | kfree(data); | |
2357 | return err; | |
f6f9279f SK |
2358 | } |
2359 | ||
c68cfb71 SK |
2360 | static void fastrpc_notify_users(struct fastrpc_user *user) |
2361 | { | |
2362 | struct fastrpc_invoke_ctx *ctx; | |
2363 | ||
2364 | spin_lock(&user->lock); | |
b6a06285 RA |
2365 | list_for_each_entry(ctx, &user->pending, node) { |
2366 | ctx->retval = -EPIPE; | |
c68cfb71 | 2367 | complete(&ctx->work); |
b6a06285 | 2368 | } |
c68cfb71 SK |
2369 | spin_unlock(&user->lock); |
2370 | } | |
2371 | ||
f6f9279f SK |
2372 | static void fastrpc_rpmsg_remove(struct rpmsg_device *rpdev) |
2373 | { | |
2374 | struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); | |
76e8e4ac | 2375 | struct fastrpc_buf *buf, *b; |
c68cfb71 | 2376 | struct fastrpc_user *user; |
977e6c8d | 2377 | unsigned long flags; |
c68cfb71 | 2378 | |
46248400 | 2379 | /* No invocations past this point */ |
977e6c8d | 2380 | spin_lock_irqsave(&cctx->lock, flags); |
46248400 | 2381 | cctx->rpdev = NULL; |
c68cfb71 SK |
2382 | list_for_each_entry(user, &cctx->users, user) |
2383 | fastrpc_notify_users(user); | |
977e6c8d | 2384 | spin_unlock_irqrestore(&cctx->lock, flags); |
f6f9279f | 2385 | |
965602ea SK |
2386 | if (cctx->fdevice) |
2387 | misc_deregister(&cctx->fdevice->miscdev); | |
2388 | ||
3abe3ab3 SK |
2389 | if (cctx->secure_fdevice) |
2390 | misc_deregister(&cctx->secure_fdevice->miscdev); | |
2391 | ||
76e8e4ac AV |
2392 | list_for_each_entry_safe(buf, b, &cctx->invoke_interrupted_mmaps, node) |
2393 | list_del(&buf->node); | |
2394 | ||
08715610 AV |
2395 | if (cctx->remote_heap) |
2396 | fastrpc_buf_free(cctx->remote_heap); | |
2397 | ||
f6f9279f | 2398 | of_platform_depopulate(&rpdev->dev); |
278d56f9 BA |
2399 | |
2400 | fastrpc_channel_ctx_put(cctx); | |
f6f9279f SK |
2401 | } |
2402 | ||
2403 | static int fastrpc_rpmsg_callback(struct rpmsg_device *rpdev, void *data, | |
2404 | int len, void *priv, u32 addr) | |
2405 | { | |
c68cfb71 SK |
2406 | struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); |
2407 | struct fastrpc_invoke_rsp *rsp = data; | |
2408 | struct fastrpc_invoke_ctx *ctx; | |
2409 | unsigned long flags; | |
2410 | unsigned long ctxid; | |
2411 | ||
2412 | if (len < sizeof(*rsp)) | |
2413 | return -EINVAL; | |
2414 | ||
2415 | ctxid = ((rsp->ctx & FASTRPC_CTXID_MASK) >> 4); | |
2416 | ||
2417 | spin_lock_irqsave(&cctx->lock, flags); | |
2418 | ctx = idr_find(&cctx->ctx_idr, ctxid); | |
2419 | spin_unlock_irqrestore(&cctx->lock, flags); | |
2420 | ||
2421 | if (!ctx) { | |
2422 | dev_err(&rpdev->dev, "No context ID matches response\n"); | |
2423 | return -ENOENT; | |
2424 | } | |
2425 | ||
2426 | ctx->retval = rsp->retval; | |
2427 | complete(&ctx->work); | |
8e7389c7 TE |
2428 | |
2429 | /* | |
2430 | * The DMA buffer associated with the context cannot be freed in | |
2431 | * interrupt context so schedule it through a worker thread to | |
2432 | * avoid a kernel BUG. | |
2433 | */ | |
2434 | schedule_work(&ctx->put_work); | |
c68cfb71 | 2435 | |
f6f9279f SK |
2436 | return 0; |
2437 | } | |
2438 | ||
2439 | static const struct of_device_id fastrpc_rpmsg_of_match[] = { | |
2440 | { .compatible = "qcom,fastrpc" }, | |
2441 | { }, | |
2442 | }; | |
2443 | MODULE_DEVICE_TABLE(of, fastrpc_rpmsg_of_match); | |
2444 | ||
2445 | static struct rpmsg_driver fastrpc_driver = { | |
2446 | .probe = fastrpc_rpmsg_probe, | |
2447 | .remove = fastrpc_rpmsg_remove, | |
2448 | .callback = fastrpc_rpmsg_callback, | |
2449 | .drv = { | |
2450 | .name = "qcom,fastrpc", | |
2451 | .of_match_table = fastrpc_rpmsg_of_match, | |
2452 | }, | |
2453 | }; | |
2454 | ||
2455 | static int fastrpc_init(void) | |
2456 | { | |
2457 | int ret; | |
2458 | ||
2459 | ret = platform_driver_register(&fastrpc_cb_driver); | |
2460 | if (ret < 0) { | |
2461 | pr_err("fastrpc: failed to register cb driver\n"); | |
2462 | return ret; | |
2463 | } | |
2464 | ||
2465 | ret = register_rpmsg_driver(&fastrpc_driver); | |
2466 | if (ret < 0) { | |
2467 | pr_err("fastrpc: failed to register rpmsg driver\n"); | |
2468 | platform_driver_unregister(&fastrpc_cb_driver); | |
2469 | return ret; | |
2470 | } | |
2471 | ||
2472 | return 0; | |
2473 | } | |
2474 | module_init(fastrpc_init); | |
2475 | ||
2476 | static void fastrpc_exit(void) | |
2477 | { | |
2478 | platform_driver_unregister(&fastrpc_cb_driver); | |
2479 | unregister_rpmsg_driver(&fastrpc_driver); | |
2480 | } | |
2481 | module_exit(fastrpc_exit); | |
2482 | ||
2483 | MODULE_LICENSE("GPL v2"); | |
16b0314a | 2484 | MODULE_IMPORT_NS(DMA_BUF); |