1
2
3
4
5
6#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
7
8#include <linux/arm-smccc.h>
9#include <linux/errno.h>
10#include <linux/io.h>
11#include <linux/module.h>
12#include <linux/of.h>
13#include <linux/of_platform.h>
14#include <linux/platform_device.h>
15#include <linux/slab.h>
16#include <linux/string.h>
17#include <linux/tee_drv.h>
18#include <linux/types.h>
19#include <linux/uaccess.h>
20#include <linux/workqueue.h>
21#include "optee_private.h"
22#include "optee_smc.h"
23#include "shm_pool.h"
24
25#define DRIVER_NAME "optee"
26
27#define OPTEE_SHM_NUM_PRIV_PAGES CONFIG_OPTEE_SHM_NUM_PRIV_PAGES
28
29
30
31
32
33
34
35
36
37int optee_from_msg_param(struct tee_param *params, size_t num_params,
38 const struct optee_msg_param *msg_params)
39{
40 int rc;
41 size_t n;
42 struct tee_shm *shm;
43 phys_addr_t pa;
44
45 for (n = 0; n < num_params; n++) {
46 struct tee_param *p = params + n;
47 const struct optee_msg_param *mp = msg_params + n;
48 u32 attr = mp->attr & OPTEE_MSG_ATTR_TYPE_MASK;
49
50 switch (attr) {
51 case OPTEE_MSG_ATTR_TYPE_NONE:
52 p->attr = TEE_IOCTL_PARAM_ATTR_TYPE_NONE;
53 memset(&p->u, 0, sizeof(p->u));
54 break;
55 case OPTEE_MSG_ATTR_TYPE_VALUE_INPUT:
56 case OPTEE_MSG_ATTR_TYPE_VALUE_OUTPUT:
57 case OPTEE_MSG_ATTR_TYPE_VALUE_INOUT:
58 p->attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT +
59 attr - OPTEE_MSG_ATTR_TYPE_VALUE_INPUT;
60 p->u.value.a = mp->u.value.a;
61 p->u.value.b = mp->u.value.b;
62 p->u.value.c = mp->u.value.c;
63 break;
64 case OPTEE_MSG_ATTR_TYPE_TMEM_INPUT:
65 case OPTEE_MSG_ATTR_TYPE_TMEM_OUTPUT:
66 case OPTEE_MSG_ATTR_TYPE_TMEM_INOUT:
67 p->attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT +
68 attr - OPTEE_MSG_ATTR_TYPE_TMEM_INPUT;
69 p->u.memref.size = mp->u.tmem.size;
70 shm = (struct tee_shm *)(unsigned long)
71 mp->u.tmem.shm_ref;
72 if (!shm) {
73 p->u.memref.shm_offs = 0;
74 p->u.memref.shm = NULL;
75 break;
76 }
77 rc = tee_shm_get_pa(shm, 0, &pa);
78 if (rc)
79 return rc;
80 p->u.memref.shm_offs = mp->u.tmem.buf_ptr - pa;
81 p->u.memref.shm = shm;
82 break;
83 case OPTEE_MSG_ATTR_TYPE_RMEM_INPUT:
84 case OPTEE_MSG_ATTR_TYPE_RMEM_OUTPUT:
85 case OPTEE_MSG_ATTR_TYPE_RMEM_INOUT:
86 p->attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT +
87 attr - OPTEE_MSG_ATTR_TYPE_RMEM_INPUT;
88 p->u.memref.size = mp->u.rmem.size;
89 shm = (struct tee_shm *)(unsigned long)
90 mp->u.rmem.shm_ref;
91
92 if (!shm) {
93 p->u.memref.shm_offs = 0;
94 p->u.memref.shm = NULL;
95 break;
96 }
97 p->u.memref.shm_offs = mp->u.rmem.offs;
98 p->u.memref.shm = shm;
99
100 break;
101
102 default:
103 return -EINVAL;
104 }
105 }
106 return 0;
107}
108
109static int to_msg_param_tmp_mem(struct optee_msg_param *mp,
110 const struct tee_param *p)
111{
112 int rc;
113 phys_addr_t pa;
114
115 mp->attr = OPTEE_MSG_ATTR_TYPE_TMEM_INPUT + p->attr -
116 TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT;
117
118 mp->u.tmem.shm_ref = (unsigned long)p->u.memref.shm;
119 mp->u.tmem.size = p->u.memref.size;
120
121 if (!p->u.memref.shm) {
122 mp->u.tmem.buf_ptr = 0;
123 return 0;
124 }
125
126 rc = tee_shm_get_pa(p->u.memref.shm, p->u.memref.shm_offs, &pa);
127 if (rc)
128 return rc;
129
130 mp->u.tmem.buf_ptr = pa;
131 mp->attr |= OPTEE_MSG_ATTR_CACHE_PREDEFINED <<
132 OPTEE_MSG_ATTR_CACHE_SHIFT;
133
134 return 0;
135}
136
137static int to_msg_param_reg_mem(struct optee_msg_param *mp,
138 const struct tee_param *p)
139{
140 mp->attr = OPTEE_MSG_ATTR_TYPE_RMEM_INPUT + p->attr -
141 TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT;
142
143 mp->u.rmem.shm_ref = (unsigned long)p->u.memref.shm;
144 mp->u.rmem.size = p->u.memref.size;
145 mp->u.rmem.offs = p->u.memref.shm_offs;
146 return 0;
147}
148
149
150
151
152
153
154
155
156int optee_to_msg_param(struct optee_msg_param *msg_params, size_t num_params,
157 const struct tee_param *params)
158{
159 int rc;
160 size_t n;
161
162 for (n = 0; n < num_params; n++) {
163 const struct tee_param *p = params + n;
164 struct optee_msg_param *mp = msg_params + n;
165
166 switch (p->attr) {
167 case TEE_IOCTL_PARAM_ATTR_TYPE_NONE:
168 mp->attr = TEE_IOCTL_PARAM_ATTR_TYPE_NONE;
169 memset(&mp->u, 0, sizeof(mp->u));
170 break;
171 case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT:
172 case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT:
173 case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT:
174 mp->attr = OPTEE_MSG_ATTR_TYPE_VALUE_INPUT + p->attr -
175 TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT;
176 mp->u.value.a = p->u.value.a;
177 mp->u.value.b = p->u.value.b;
178 mp->u.value.c = p->u.value.c;
179 break;
180 case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT:
181 case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT:
182 case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT:
183 if (tee_shm_is_registered(p->u.memref.shm))
184 rc = to_msg_param_reg_mem(mp, p);
185 else
186 rc = to_msg_param_tmp_mem(mp, p);
187 if (rc)
188 return rc;
189 break;
190 default:
191 return -EINVAL;
192 }
193 }
194 return 0;
195}
196
197static void optee_get_version(struct tee_device *teedev,
198 struct tee_ioctl_version_data *vers)
199{
200 struct tee_ioctl_version_data v = {
201 .impl_id = TEE_IMPL_ID_OPTEE,
202 .impl_caps = TEE_OPTEE_CAP_TZ,
203 .gen_caps = TEE_GEN_CAP_GP,
204 };
205 struct optee *optee = tee_get_drvdata(teedev);
206
207 if (optee->sec_caps & OPTEE_SMC_SEC_CAP_DYNAMIC_SHM)
208 v.gen_caps |= TEE_GEN_CAP_REG_MEM;
209 if (optee->sec_caps & OPTEE_SMC_SEC_CAP_MEMREF_NULL)
210 v.gen_caps |= TEE_GEN_CAP_MEMREF_NULL;
211 *vers = v;
212}
213
214static void optee_bus_scan(struct work_struct *work)
215{
216 WARN_ON(optee_enumerate_devices(PTA_CMD_GET_DEVICES_SUPP));
217}
218
219static int optee_open(struct tee_context *ctx)
220{
221 struct optee_context_data *ctxdata;
222 struct tee_device *teedev = ctx->teedev;
223 struct optee *optee = tee_get_drvdata(teedev);
224
225 ctxdata = kzalloc(sizeof(*ctxdata), GFP_KERNEL);
226 if (!ctxdata)
227 return -ENOMEM;
228
229 if (teedev == optee->supp_teedev) {
230 bool busy = true;
231
232 mutex_lock(&optee->supp.mutex);
233 if (!optee->supp.ctx) {
234 busy = false;
235 optee->supp.ctx = ctx;
236 }
237 mutex_unlock(&optee->supp.mutex);
238 if (busy) {
239 kfree(ctxdata);
240 return -EBUSY;
241 }
242
243 if (!optee->scan_bus_done) {
244 INIT_WORK(&optee->scan_bus_work, optee_bus_scan);
245 optee->scan_bus_wq = create_workqueue("optee_bus_scan");
246 if (!optee->scan_bus_wq) {
247 kfree(ctxdata);
248 return -ECHILD;
249 }
250 queue_work(optee->scan_bus_wq, &optee->scan_bus_work);
251 optee->scan_bus_done = true;
252 }
253 }
254 mutex_init(&ctxdata->mutex);
255 INIT_LIST_HEAD(&ctxdata->sess_list);
256
257 if (optee->sec_caps & OPTEE_SMC_SEC_CAP_MEMREF_NULL)
258 ctx->cap_memref_null = true;
259 else
260 ctx->cap_memref_null = false;
261
262 ctx->data = ctxdata;
263 return 0;
264}
265
266static void optee_release(struct tee_context *ctx)
267{
268 struct optee_context_data *ctxdata = ctx->data;
269 struct tee_device *teedev = ctx->teedev;
270 struct optee *optee = tee_get_drvdata(teedev);
271 struct tee_shm *shm;
272 struct optee_msg_arg *arg = NULL;
273 phys_addr_t parg;
274 struct optee_session *sess;
275 struct optee_session *sess_tmp;
276
277 if (!ctxdata)
278 return;
279
280 shm = tee_shm_alloc(ctx, sizeof(struct optee_msg_arg), TEE_SHM_MAPPED);
281 if (!IS_ERR(shm)) {
282 arg = tee_shm_get_va(shm, 0);
283
284
285
286
287
288
289 if (!IS_ERR(arg))
290 if (tee_shm_va2pa(shm, arg, &parg))
291 arg = NULL;
292 }
293
294 list_for_each_entry_safe(sess, sess_tmp, &ctxdata->sess_list,
295 list_node) {
296 list_del(&sess->list_node);
297 if (!IS_ERR_OR_NULL(arg)) {
298 memset(arg, 0, sizeof(*arg));
299 arg->cmd = OPTEE_MSG_CMD_CLOSE_SESSION;
300 arg->session = sess->session_id;
301 optee_do_call_with_arg(ctx, parg);
302 }
303 kfree(sess);
304 }
305 kfree(ctxdata);
306
307 if (!IS_ERR(shm))
308 tee_shm_free(shm);
309
310 ctx->data = NULL;
311
312 if (teedev == optee->supp_teedev) {
313 if (optee->scan_bus_wq) {
314 destroy_workqueue(optee->scan_bus_wq);
315 optee->scan_bus_wq = NULL;
316 }
317 optee_supp_release(&optee->supp);
318 }
319}
320
321static const struct tee_driver_ops optee_ops = {
322 .get_version = optee_get_version,
323 .open = optee_open,
324 .release = optee_release,
325 .open_session = optee_open_session,
326 .close_session = optee_close_session,
327 .invoke_func = optee_invoke_func,
328 .cancel_req = optee_cancel_req,
329 .shm_register = optee_shm_register,
330 .shm_unregister = optee_shm_unregister,
331};
332
333static const struct tee_desc optee_desc = {
334 .name = DRIVER_NAME "-clnt",
335 .ops = &optee_ops,
336 .owner = THIS_MODULE,
337};
338
339static const struct tee_driver_ops optee_supp_ops = {
340 .get_version = optee_get_version,
341 .open = optee_open,
342 .release = optee_release,
343 .supp_recv = optee_supp_recv,
344 .supp_send = optee_supp_send,
345 .shm_register = optee_shm_register_supp,
346 .shm_unregister = optee_shm_unregister_supp,
347};
348
349static const struct tee_desc optee_supp_desc = {
350 .name = DRIVER_NAME "-supp",
351 .ops = &optee_supp_ops,
352 .owner = THIS_MODULE,
353 .flags = TEE_DESC_PRIVILEGED,
354};
355
356static bool optee_msg_api_uid_is_optee_api(optee_invoke_fn *invoke_fn)
357{
358 struct arm_smccc_res res;
359
360 invoke_fn(OPTEE_SMC_CALLS_UID, 0, 0, 0, 0, 0, 0, 0, &res);
361
362 if (res.a0 == OPTEE_MSG_UID_0 && res.a1 == OPTEE_MSG_UID_1 &&
363 res.a2 == OPTEE_MSG_UID_2 && res.a3 == OPTEE_MSG_UID_3)
364 return true;
365 return false;
366}
367
368static void optee_msg_get_os_revision(optee_invoke_fn *invoke_fn)
369{
370 union {
371 struct arm_smccc_res smccc;
372 struct optee_smc_call_get_os_revision_result result;
373 } res = {
374 .result = {
375 .build_id = 0
376 }
377 };
378
379 invoke_fn(OPTEE_SMC_CALL_GET_OS_REVISION, 0, 0, 0, 0, 0, 0, 0,
380 &res.smccc);
381
382 if (res.result.build_id)
383 pr_info("revision %lu.%lu (%08lx)", res.result.major,
384 res.result.minor, res.result.build_id);
385 else
386 pr_info("revision %lu.%lu", res.result.major, res.result.minor);
387}
388
389static bool optee_msg_api_revision_is_compatible(optee_invoke_fn *invoke_fn)
390{
391 union {
392 struct arm_smccc_res smccc;
393 struct optee_smc_calls_revision_result result;
394 } res;
395
396 invoke_fn(OPTEE_SMC_CALLS_REVISION, 0, 0, 0, 0, 0, 0, 0, &res.smccc);
397
398 if (res.result.major == OPTEE_MSG_REVISION_MAJOR &&
399 (int)res.result.minor >= OPTEE_MSG_REVISION_MINOR)
400 return true;
401 return false;
402}
403
404static bool optee_msg_exchange_capabilities(optee_invoke_fn *invoke_fn,
405 u32 *sec_caps)
406{
407 union {
408 struct arm_smccc_res smccc;
409 struct optee_smc_exchange_capabilities_result result;
410 } res;
411 u32 a1 = 0;
412
413
414
415
416
417
418 if (!IS_ENABLED(CONFIG_SMP) || nr_cpu_ids == 1)
419 a1 |= OPTEE_SMC_NSEC_CAP_UNIPROCESSOR;
420
421 invoke_fn(OPTEE_SMC_EXCHANGE_CAPABILITIES, a1, 0, 0, 0, 0, 0, 0,
422 &res.smccc);
423
424 if (res.result.status != OPTEE_SMC_RETURN_OK)
425 return false;
426
427 *sec_caps = res.result.capabilities;
428 return true;
429}
430
431static struct tee_shm_pool *optee_config_dyn_shm(void)
432{
433 struct tee_shm_pool_mgr *priv_mgr;
434 struct tee_shm_pool_mgr *dmabuf_mgr;
435 void *rc;
436
437 rc = optee_shm_pool_alloc_pages();
438 if (IS_ERR(rc))
439 return rc;
440 priv_mgr = rc;
441
442 rc = optee_shm_pool_alloc_pages();
443 if (IS_ERR(rc)) {
444 tee_shm_pool_mgr_destroy(priv_mgr);
445 return rc;
446 }
447 dmabuf_mgr = rc;
448
449 rc = tee_shm_pool_alloc(priv_mgr, dmabuf_mgr);
450 if (IS_ERR(rc)) {
451 tee_shm_pool_mgr_destroy(priv_mgr);
452 tee_shm_pool_mgr_destroy(dmabuf_mgr);
453 }
454
455 return rc;
456}
457
458static struct tee_shm_pool *
459optee_config_shm_memremap(optee_invoke_fn *invoke_fn, void **memremaped_shm)
460{
461 union {
462 struct arm_smccc_res smccc;
463 struct optee_smc_get_shm_config_result result;
464 } res;
465 unsigned long vaddr;
466 phys_addr_t paddr;
467 size_t size;
468 phys_addr_t begin;
469 phys_addr_t end;
470 void *va;
471 struct tee_shm_pool_mgr *priv_mgr;
472 struct tee_shm_pool_mgr *dmabuf_mgr;
473 void *rc;
474 const int sz = OPTEE_SHM_NUM_PRIV_PAGES * PAGE_SIZE;
475
476 invoke_fn(OPTEE_SMC_GET_SHM_CONFIG, 0, 0, 0, 0, 0, 0, 0, &res.smccc);
477 if (res.result.status != OPTEE_SMC_RETURN_OK) {
478 pr_err("static shm service not available\n");
479 return ERR_PTR(-ENOENT);
480 }
481
482 if (res.result.settings != OPTEE_SMC_SHM_CACHED) {
483 pr_err("only normal cached shared memory supported\n");
484 return ERR_PTR(-EINVAL);
485 }
486
487 begin = roundup(res.result.start, PAGE_SIZE);
488 end = rounddown(res.result.start + res.result.size, PAGE_SIZE);
489 paddr = begin;
490 size = end - begin;
491
492 if (size < 2 * OPTEE_SHM_NUM_PRIV_PAGES * PAGE_SIZE) {
493 pr_err("too small shared memory area\n");
494 return ERR_PTR(-EINVAL);
495 }
496
497 va = memremap(paddr, size, MEMREMAP_WB);
498 if (!va) {
499 pr_err("shared memory ioremap failed\n");
500 return ERR_PTR(-EINVAL);
501 }
502 vaddr = (unsigned long)va;
503
504 rc = tee_shm_pool_mgr_alloc_res_mem(vaddr, paddr, sz,
505 3 );
506 if (IS_ERR(rc))
507 goto err_memunmap;
508 priv_mgr = rc;
509
510 vaddr += sz;
511 paddr += sz;
512 size -= sz;
513
514 rc = tee_shm_pool_mgr_alloc_res_mem(vaddr, paddr, size, PAGE_SHIFT);
515 if (IS_ERR(rc))
516 goto err_free_priv_mgr;
517 dmabuf_mgr = rc;
518
519 rc = tee_shm_pool_alloc(priv_mgr, dmabuf_mgr);
520 if (IS_ERR(rc))
521 goto err_free_dmabuf_mgr;
522
523 *memremaped_shm = va;
524
525 return rc;
526
527err_free_dmabuf_mgr:
528 tee_shm_pool_mgr_destroy(dmabuf_mgr);
529err_free_priv_mgr:
530 tee_shm_pool_mgr_destroy(priv_mgr);
531err_memunmap:
532 memunmap(va);
533 return rc;
534}
535
536
537static void optee_smccc_smc(unsigned long a0, unsigned long a1,
538 unsigned long a2, unsigned long a3,
539 unsigned long a4, unsigned long a5,
540 unsigned long a6, unsigned long a7,
541 struct arm_smccc_res *res)
542{
543 arm_smccc_smc(a0, a1, a2, a3, a4, a5, a6, a7, res);
544}
545
546static void optee_smccc_hvc(unsigned long a0, unsigned long a1,
547 unsigned long a2, unsigned long a3,
548 unsigned long a4, unsigned long a5,
549 unsigned long a6, unsigned long a7,
550 struct arm_smccc_res *res)
551{
552 arm_smccc_hvc(a0, a1, a2, a3, a4, a5, a6, a7, res);
553}
554
555static optee_invoke_fn *get_invoke_func(struct device *dev)
556{
557 const char *method;
558
559 pr_info("probing for conduit method.\n");
560
561 if (device_property_read_string(dev, "method", &method)) {
562 pr_warn("missing \"method\" property\n");
563 return ERR_PTR(-ENXIO);
564 }
565
566 if (!strcmp("hvc", method))
567 return optee_smccc_hvc;
568 else if (!strcmp("smc", method))
569 return optee_smccc_smc;
570
571 pr_warn("invalid \"method\" property: %s\n", method);
572 return ERR_PTR(-EINVAL);
573}
574
575static int optee_remove(struct platform_device *pdev)
576{
577 struct optee *optee = platform_get_drvdata(pdev);
578
579
580
581
582
583
584 optee_disable_shm_cache(optee);
585
586
587
588
589
590 tee_device_unregister(optee->supp_teedev);
591 tee_device_unregister(optee->teedev);
592
593 tee_shm_pool_free(optee->pool);
594 if (optee->memremaped_shm)
595 memunmap(optee->memremaped_shm);
596 optee_wait_queue_exit(&optee->wait_queue);
597 optee_supp_uninit(&optee->supp);
598 mutex_destroy(&optee->call_queue.mutex);
599
600 kfree(optee);
601
602 return 0;
603}
604
605static int optee_probe(struct platform_device *pdev)
606{
607 optee_invoke_fn *invoke_fn;
608 struct tee_shm_pool *pool = ERR_PTR(-EINVAL);
609 struct optee *optee = NULL;
610 void *memremaped_shm = NULL;
611 struct tee_device *teedev;
612 u32 sec_caps;
613 int rc;
614
615 invoke_fn = get_invoke_func(&pdev->dev);
616 if (IS_ERR(invoke_fn))
617 return PTR_ERR(invoke_fn);
618
619 if (!optee_msg_api_uid_is_optee_api(invoke_fn)) {
620 pr_warn("api uid mismatch\n");
621 return -EINVAL;
622 }
623
624 optee_msg_get_os_revision(invoke_fn);
625
626 if (!optee_msg_api_revision_is_compatible(invoke_fn)) {
627 pr_warn("api revision mismatch\n");
628 return -EINVAL;
629 }
630
631 if (!optee_msg_exchange_capabilities(invoke_fn, &sec_caps)) {
632 pr_warn("capabilities mismatch\n");
633 return -EINVAL;
634 }
635
636
637
638
639 if (sec_caps & OPTEE_SMC_SEC_CAP_DYNAMIC_SHM)
640 pool = optee_config_dyn_shm();
641
642
643
644
645 if (IS_ERR(pool) && (sec_caps & OPTEE_SMC_SEC_CAP_HAVE_RESERVED_SHM))
646 pool = optee_config_shm_memremap(invoke_fn, &memremaped_shm);
647
648 if (IS_ERR(pool))
649 return PTR_ERR(pool);
650
651 optee = kzalloc(sizeof(*optee), GFP_KERNEL);
652 if (!optee) {
653 rc = -ENOMEM;
654 goto err;
655 }
656
657 optee->invoke_fn = invoke_fn;
658 optee->sec_caps = sec_caps;
659
660 teedev = tee_device_alloc(&optee_desc, NULL, pool, optee);
661 if (IS_ERR(teedev)) {
662 rc = PTR_ERR(teedev);
663 goto err;
664 }
665 optee->teedev = teedev;
666
667 teedev = tee_device_alloc(&optee_supp_desc, NULL, pool, optee);
668 if (IS_ERR(teedev)) {
669 rc = PTR_ERR(teedev);
670 goto err;
671 }
672 optee->supp_teedev = teedev;
673
674 rc = tee_device_register(optee->teedev);
675 if (rc)
676 goto err;
677
678 rc = tee_device_register(optee->supp_teedev);
679 if (rc)
680 goto err;
681
682 mutex_init(&optee->call_queue.mutex);
683 INIT_LIST_HEAD(&optee->call_queue.waiters);
684 optee_wait_queue_init(&optee->wait_queue);
685 optee_supp_init(&optee->supp);
686 optee->memremaped_shm = memremaped_shm;
687 optee->pool = pool;
688
689 optee_enable_shm_cache(optee);
690
691 if (optee->sec_caps & OPTEE_SMC_SEC_CAP_DYNAMIC_SHM)
692 pr_info("dynamic shared memory is enabled\n");
693
694 platform_set_drvdata(pdev, optee);
695
696 rc = optee_enumerate_devices(PTA_CMD_GET_DEVICES);
697 if (rc) {
698 optee_remove(pdev);
699 return rc;
700 }
701
702 pr_info("initialized driver\n");
703 return 0;
704err:
705 if (optee) {
706
707
708
709
710
711 tee_device_unregister(optee->supp_teedev);
712 tee_device_unregister(optee->teedev);
713 kfree(optee);
714 }
715 if (pool)
716 tee_shm_pool_free(pool);
717 if (memremaped_shm)
718 memunmap(memremaped_shm);
719 return rc;
720}
721
722static const struct of_device_id optee_dt_match[] = {
723 { .compatible = "linaro,optee-tz" },
724 {},
725};
726MODULE_DEVICE_TABLE(of, optee_dt_match);
727
728static struct platform_driver optee_driver = {
729 .probe = optee_probe,
730 .remove = optee_remove,
731 .driver = {
732 .name = "optee",
733 .of_match_table = optee_dt_match,
734 },
735};
736module_platform_driver(optee_driver);
737
738MODULE_AUTHOR("Linaro");
739MODULE_DESCRIPTION("OP-TEE driver");
740MODULE_VERSION("1.0");
741MODULE_LICENSE("GPL v2");
742MODULE_ALIAS("platform:optee");
743
