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
83
84 if (p->u.memref.size) {
85 size_t o = p->u.memref.shm_offs +
86 p->u.memref.size - 1;
87
88 rc = tee_shm_get_pa(shm, o, NULL);
89 if (rc)
90 return rc;
91 }
92 break;
93 case OPTEE_MSG_ATTR_TYPE_RMEM_INPUT:
94 case OPTEE_MSG_ATTR_TYPE_RMEM_OUTPUT:
95 case OPTEE_MSG_ATTR_TYPE_RMEM_INOUT:
96 p->attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT +
97 attr - OPTEE_MSG_ATTR_TYPE_RMEM_INPUT;
98 p->u.memref.size = mp->u.rmem.size;
99 shm = (struct tee_shm *)(unsigned long)
100 mp->u.rmem.shm_ref;
101
102 if (!shm) {
103 p->u.memref.shm_offs = 0;
104 p->u.memref.shm = NULL;
105 break;
106 }
107 p->u.memref.shm_offs = mp->u.rmem.offs;
108 p->u.memref.shm = shm;
109
110 break;
111
112 default:
113 return -EINVAL;
114 }
115 }
116 return 0;
117}
118
119static int to_msg_param_tmp_mem(struct optee_msg_param *mp,
120 const struct tee_param *p)
121{
122 int rc;
123 phys_addr_t pa;
124
125 mp->attr = OPTEE_MSG_ATTR_TYPE_TMEM_INPUT + p->attr -
126 TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT;
127
128 mp->u.tmem.shm_ref = (unsigned long)p->u.memref.shm;
129 mp->u.tmem.size = p->u.memref.size;
130
131 if (!p->u.memref.shm) {
132 mp->u.tmem.buf_ptr = 0;
133 return 0;
134 }
135
136 rc = tee_shm_get_pa(p->u.memref.shm, p->u.memref.shm_offs, &pa);
137 if (rc)
138 return rc;
139
140 mp->u.tmem.buf_ptr = pa;
141 mp->attr |= OPTEE_MSG_ATTR_CACHE_PREDEFINED <<
142 OPTEE_MSG_ATTR_CACHE_SHIFT;
143
144 return 0;
145}
146
147static int to_msg_param_reg_mem(struct optee_msg_param *mp,
148 const struct tee_param *p)
149{
150 mp->attr = OPTEE_MSG_ATTR_TYPE_RMEM_INPUT + p->attr -
151 TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT;
152
153 mp->u.rmem.shm_ref = (unsigned long)p->u.memref.shm;
154 mp->u.rmem.size = p->u.memref.size;
155 mp->u.rmem.offs = p->u.memref.shm_offs;
156 return 0;
157}
158
159
160
161
162
163
164
165
166int optee_to_msg_param(struct optee_msg_param *msg_params, size_t num_params,
167 const struct tee_param *params)
168{
169 int rc;
170 size_t n;
171
172 for (n = 0; n < num_params; n++) {
173 const struct tee_param *p = params + n;
174 struct optee_msg_param *mp = msg_params + n;
175
176 switch (p->attr) {
177 case TEE_IOCTL_PARAM_ATTR_TYPE_NONE:
178 mp->attr = TEE_IOCTL_PARAM_ATTR_TYPE_NONE;
179 memset(&mp->u, 0, sizeof(mp->u));
180 break;
181 case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT:
182 case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT:
183 case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT:
184 mp->attr = OPTEE_MSG_ATTR_TYPE_VALUE_INPUT + p->attr -
185 TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT;
186 mp->u.value.a = p->u.value.a;
187 mp->u.value.b = p->u.value.b;
188 mp->u.value.c = p->u.value.c;
189 break;
190 case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT:
191 case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT:
192 case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT:
193 if (tee_shm_is_registered(p->u.memref.shm))
194 rc = to_msg_param_reg_mem(mp, p);
195 else
196 rc = to_msg_param_tmp_mem(mp, p);
197 if (rc)
198 return rc;
199 break;
200 default:
201 return -EINVAL;
202 }
203 }
204 return 0;
205}
206
207static void optee_get_version(struct tee_device *teedev,
208 struct tee_ioctl_version_data *vers)
209{
210 struct tee_ioctl_version_data v = {
211 .impl_id = TEE_IMPL_ID_OPTEE,
212 .impl_caps = TEE_OPTEE_CAP_TZ,
213 .gen_caps = TEE_GEN_CAP_GP,
214 };
215 struct optee *optee = tee_get_drvdata(teedev);
216
217 if (optee->sec_caps & OPTEE_SMC_SEC_CAP_DYNAMIC_SHM)
218 v.gen_caps |= TEE_GEN_CAP_REG_MEM;
219 if (optee->sec_caps & OPTEE_SMC_SEC_CAP_MEMREF_NULL)
220 v.gen_caps |= TEE_GEN_CAP_MEMREF_NULL;
221 *vers = v;
222}
223
224static void optee_bus_scan(struct work_struct *work)
225{
226 WARN_ON(optee_enumerate_devices(PTA_CMD_GET_DEVICES_SUPP));
227}
228
229static int optee_open(struct tee_context *ctx)
230{
231 struct optee_context_data *ctxdata;
232 struct tee_device *teedev = ctx->teedev;
233 struct optee *optee = tee_get_drvdata(teedev);
234
235 ctxdata = kzalloc(sizeof(*ctxdata), GFP_KERNEL);
236 if (!ctxdata)
237 return -ENOMEM;
238
239 if (teedev == optee->supp_teedev) {
240 bool busy = true;
241
242 mutex_lock(&optee->supp.mutex);
243 if (!optee->supp.ctx) {
244 busy = false;
245 optee->supp.ctx = ctx;
246 }
247 mutex_unlock(&optee->supp.mutex);
248 if (busy) {
249 kfree(ctxdata);
250 return -EBUSY;
251 }
252
253 if (!optee->scan_bus_done) {
254 INIT_WORK(&optee->scan_bus_work, optee_bus_scan);
255 optee->scan_bus_wq = create_workqueue("optee_bus_scan");
256 if (!optee->scan_bus_wq) {
257 kfree(ctxdata);
258 return -ECHILD;
259 }
260 queue_work(optee->scan_bus_wq, &optee->scan_bus_work);
261 optee->scan_bus_done = true;
262 }
263 }
264 mutex_init(&ctxdata->mutex);
265 INIT_LIST_HEAD(&ctxdata->sess_list);
266
267 if (optee->sec_caps & OPTEE_SMC_SEC_CAP_MEMREF_NULL)
268 ctx->cap_memref_null = true;
269 else
270 ctx->cap_memref_null = false;
271
272 ctx->data = ctxdata;
273 return 0;
274}
275
276static void optee_release(struct tee_context *ctx)
277{
278 struct optee_context_data *ctxdata = ctx->data;
279 struct tee_device *teedev = ctx->teedev;
280 struct optee *optee = tee_get_drvdata(teedev);
281 struct tee_shm *shm;
282 struct optee_msg_arg *arg = NULL;
283 phys_addr_t parg;
284 struct optee_session *sess;
285 struct optee_session *sess_tmp;
286
287 if (!ctxdata)
288 return;
289
290 shm = tee_shm_alloc(ctx, sizeof(struct optee_msg_arg), TEE_SHM_MAPPED);
291 if (!IS_ERR(shm)) {
292 arg = tee_shm_get_va(shm, 0);
293
294
295
296
297
298
299 if (!IS_ERR(arg))
300 if (tee_shm_va2pa(shm, arg, &parg))
301 arg = NULL;
302 }
303
304 list_for_each_entry_safe(sess, sess_tmp, &ctxdata->sess_list,
305 list_node) {
306 list_del(&sess->list_node);
307 if (!IS_ERR_OR_NULL(arg)) {
308 memset(arg, 0, sizeof(*arg));
309 arg->cmd = OPTEE_MSG_CMD_CLOSE_SESSION;
310 arg->session = sess->session_id;
311 optee_do_call_with_arg(ctx, parg);
312 }
313 kfree(sess);
314 }
315 kfree(ctxdata);
316
317 if (!IS_ERR(shm))
318 tee_shm_free(shm);
319
320 ctx->data = NULL;
321
322 if (teedev == optee->supp_teedev) {
323 if (optee->scan_bus_wq) {
324 destroy_workqueue(optee->scan_bus_wq);
325 optee->scan_bus_wq = NULL;
326 }
327 optee_supp_release(&optee->supp);
328 }
329}
330
331static const struct tee_driver_ops optee_ops = {
332 .get_version = optee_get_version,
333 .open = optee_open,
334 .release = optee_release,
335 .open_session = optee_open_session,
336 .close_session = optee_close_session,
337 .invoke_func = optee_invoke_func,
338 .cancel_req = optee_cancel_req,
339 .shm_register = optee_shm_register,
340 .shm_unregister = optee_shm_unregister,
341};
342
343static const struct tee_desc optee_desc = {
344 .name = DRIVER_NAME "-clnt",
345 .ops = &optee_ops,
346 .owner = THIS_MODULE,
347};
348
349static const struct tee_driver_ops optee_supp_ops = {
350 .get_version = optee_get_version,
351 .open = optee_open,
352 .release = optee_release,
353 .supp_recv = optee_supp_recv,
354 .supp_send = optee_supp_send,
355 .shm_register = optee_shm_register_supp,
356 .shm_unregister = optee_shm_unregister_supp,
357};
358
359static const struct tee_desc optee_supp_desc = {
360 .name = DRIVER_NAME "-supp",
361 .ops = &optee_supp_ops,
362 .owner = THIS_MODULE,
363 .flags = TEE_DESC_PRIVILEGED,
364};
365
366static bool optee_msg_api_uid_is_optee_api(optee_invoke_fn *invoke_fn)
367{
368 struct arm_smccc_res res;
369
370 invoke_fn(OPTEE_SMC_CALLS_UID, 0, 0, 0, 0, 0, 0, 0, &res);
371
372 if (res.a0 == OPTEE_MSG_UID_0 && res.a1 == OPTEE_MSG_UID_1 &&
373 res.a2 == OPTEE_MSG_UID_2 && res.a3 == OPTEE_MSG_UID_3)
374 return true;
375 return false;
376}
377
378static void optee_msg_get_os_revision(optee_invoke_fn *invoke_fn)
379{
380 union {
381 struct arm_smccc_res smccc;
382 struct optee_smc_call_get_os_revision_result result;
383 } res = {
384 .result = {
385 .build_id = 0
386 }
387 };
388
389 invoke_fn(OPTEE_SMC_CALL_GET_OS_REVISION, 0, 0, 0, 0, 0, 0, 0,
390 &res.smccc);
391
392 if (res.result.build_id)
393 pr_info("revision %lu.%lu (%08lx)", res.result.major,
394 res.result.minor, res.result.build_id);
395 else
396 pr_info("revision %lu.%lu", res.result.major, res.result.minor);
397}
398
399static bool optee_msg_api_revision_is_compatible(optee_invoke_fn *invoke_fn)
400{
401 union {
402 struct arm_smccc_res smccc;
403 struct optee_smc_calls_revision_result result;
404 } res;
405
406 invoke_fn(OPTEE_SMC_CALLS_REVISION, 0, 0, 0, 0, 0, 0, 0, &res.smccc);
407
408 if (res.result.major == OPTEE_MSG_REVISION_MAJOR &&
409 (int)res.result.minor >= OPTEE_MSG_REVISION_MINOR)
410 return true;
411 return false;
412}
413
414static bool optee_msg_exchange_capabilities(optee_invoke_fn *invoke_fn,
415 u32 *sec_caps)
416{
417 union {
418 struct arm_smccc_res smccc;
419 struct optee_smc_exchange_capabilities_result result;
420 } res;
421 u32 a1 = 0;
422
423
424
425
426
427
428 if (!IS_ENABLED(CONFIG_SMP) || nr_cpu_ids == 1)
429 a1 |= OPTEE_SMC_NSEC_CAP_UNIPROCESSOR;
430
431 invoke_fn(OPTEE_SMC_EXCHANGE_CAPABILITIES, a1, 0, 0, 0, 0, 0, 0,
432 &res.smccc);
433
434 if (res.result.status != OPTEE_SMC_RETURN_OK)
435 return false;
436
437 *sec_caps = res.result.capabilities;
438 return true;
439}
440
441static struct tee_shm_pool *optee_config_dyn_shm(void)
442{
443 struct tee_shm_pool_mgr *priv_mgr;
444 struct tee_shm_pool_mgr *dmabuf_mgr;
445 void *rc;
446
447 rc = optee_shm_pool_alloc_pages();
448 if (IS_ERR(rc))
449 return rc;
450 priv_mgr = rc;
451
452 rc = optee_shm_pool_alloc_pages();
453 if (IS_ERR(rc)) {
454 tee_shm_pool_mgr_destroy(priv_mgr);
455 return rc;
456 }
457 dmabuf_mgr = rc;
458
459 rc = tee_shm_pool_alloc(priv_mgr, dmabuf_mgr);
460 if (IS_ERR(rc)) {
461 tee_shm_pool_mgr_destroy(priv_mgr);
462 tee_shm_pool_mgr_destroy(dmabuf_mgr);
463 }
464
465 return rc;
466}
467
468static struct tee_shm_pool *
469optee_config_shm_memremap(optee_invoke_fn *invoke_fn, void **memremaped_shm)
470{
471 union {
472 struct arm_smccc_res smccc;
473 struct optee_smc_get_shm_config_result result;
474 } res;
475 unsigned long vaddr;
476 phys_addr_t paddr;
477 size_t size;
478 phys_addr_t begin;
479 phys_addr_t end;
480 void *va;
481 struct tee_shm_pool_mgr *priv_mgr;
482 struct tee_shm_pool_mgr *dmabuf_mgr;
483 void *rc;
484 const int sz = OPTEE_SHM_NUM_PRIV_PAGES * PAGE_SIZE;
485
486 invoke_fn(OPTEE_SMC_GET_SHM_CONFIG, 0, 0, 0, 0, 0, 0, 0, &res.smccc);
487 if (res.result.status != OPTEE_SMC_RETURN_OK) {
488 pr_err("static shm service not available\n");
489 return ERR_PTR(-ENOENT);
490 }
491
492 if (res.result.settings != OPTEE_SMC_SHM_CACHED) {
493 pr_err("only normal cached shared memory supported\n");
494 return ERR_PTR(-EINVAL);
495 }
496
497 begin = roundup(res.result.start, PAGE_SIZE);
498 end = rounddown(res.result.start + res.result.size, PAGE_SIZE);
499 paddr = begin;
500 size = end - begin;
501
502 if (size < 2 * OPTEE_SHM_NUM_PRIV_PAGES * PAGE_SIZE) {
503 pr_err("too small shared memory area\n");
504 return ERR_PTR(-EINVAL);
505 }
506
507 va = memremap(paddr, size, MEMREMAP_WB);
508 if (!va) {
509 pr_err("shared memory ioremap failed\n");
510 return ERR_PTR(-EINVAL);
511 }
512 vaddr = (unsigned long)va;
513
514 rc = tee_shm_pool_mgr_alloc_res_mem(vaddr, paddr, sz,
515 3 );
516 if (IS_ERR(rc))
517 goto err_memunmap;
518 priv_mgr = rc;
519
520 vaddr += sz;
521 paddr += sz;
522 size -= sz;
523
524 rc = tee_shm_pool_mgr_alloc_res_mem(vaddr, paddr, size, PAGE_SHIFT);
525 if (IS_ERR(rc))
526 goto err_free_priv_mgr;
527 dmabuf_mgr = rc;
528
529 rc = tee_shm_pool_alloc(priv_mgr, dmabuf_mgr);
530 if (IS_ERR(rc))
531 goto err_free_dmabuf_mgr;
532
533 *memremaped_shm = va;
534
535 return rc;
536
537err_free_dmabuf_mgr:
538 tee_shm_pool_mgr_destroy(dmabuf_mgr);
539err_free_priv_mgr:
540 tee_shm_pool_mgr_destroy(priv_mgr);
541err_memunmap:
542 memunmap(va);
543 return rc;
544}
545
546
547static void optee_smccc_smc(unsigned long a0, unsigned long a1,
548 unsigned long a2, unsigned long a3,
549 unsigned long a4, unsigned long a5,
550 unsigned long a6, unsigned long a7,
551 struct arm_smccc_res *res)
552{
553 arm_smccc_smc(a0, a1, a2, a3, a4, a5, a6, a7, res);
554}
555
556static void optee_smccc_hvc(unsigned long a0, unsigned long a1,
557 unsigned long a2, unsigned long a3,
558 unsigned long a4, unsigned long a5,
559 unsigned long a6, unsigned long a7,
560 struct arm_smccc_res *res)
561{
562 arm_smccc_hvc(a0, a1, a2, a3, a4, a5, a6, a7, res);
563}
564
565static optee_invoke_fn *get_invoke_func(struct device *dev)
566{
567 const char *method;
568
569 pr_info("probing for conduit method.\n");
570
571 if (device_property_read_string(dev, "method", &method)) {
572 pr_warn("missing \"method\" property\n");
573 return ERR_PTR(-ENXIO);
574 }
575
576 if (!strcmp("hvc", method))
577 return optee_smccc_hvc;
578 else if (!strcmp("smc", method))
579 return optee_smccc_smc;
580
581 pr_warn("invalid \"method\" property: %s\n", method);
582 return ERR_PTR(-EINVAL);
583}
584
585static int optee_remove(struct platform_device *pdev)
586{
587 struct optee *optee = platform_get_drvdata(pdev);
588
589
590
591
592
593
594 optee_disable_shm_cache(optee);
595
596
597
598
599
600 tee_device_unregister(optee->supp_teedev);
601 tee_device_unregister(optee->teedev);
602
603 tee_shm_pool_free(optee->pool);
604 if (optee->memremaped_shm)
605 memunmap(optee->memremaped_shm);
606 optee_wait_queue_exit(&optee->wait_queue);
607 optee_supp_uninit(&optee->supp);
608 mutex_destroy(&optee->call_queue.mutex);
609
610 kfree(optee);
611
612 return 0;
613}
614
615static int optee_probe(struct platform_device *pdev)
616{
617 optee_invoke_fn *invoke_fn;
618 struct tee_shm_pool *pool = ERR_PTR(-EINVAL);
619 struct optee *optee = NULL;
620 void *memremaped_shm = NULL;
621 struct tee_device *teedev;
622 u32 sec_caps;
623 int rc;
624
625 invoke_fn = get_invoke_func(&pdev->dev);
626 if (IS_ERR(invoke_fn))
627 return PTR_ERR(invoke_fn);
628
629 if (!optee_msg_api_uid_is_optee_api(invoke_fn)) {
630 pr_warn("api uid mismatch\n");
631 return -EINVAL;
632 }
633
634 optee_msg_get_os_revision(invoke_fn);
635
636 if (!optee_msg_api_revision_is_compatible(invoke_fn)) {
637 pr_warn("api revision mismatch\n");
638 return -EINVAL;
639 }
640
641 if (!optee_msg_exchange_capabilities(invoke_fn, &sec_caps)) {
642 pr_warn("capabilities mismatch\n");
643 return -EINVAL;
644 }
645
646
647
648
649 if (sec_caps & OPTEE_SMC_SEC_CAP_DYNAMIC_SHM)
650 pool = optee_config_dyn_shm();
651
652
653
654
655 if (IS_ERR(pool) && (sec_caps & OPTEE_SMC_SEC_CAP_HAVE_RESERVED_SHM))
656 pool = optee_config_shm_memremap(invoke_fn, &memremaped_shm);
657
658 if (IS_ERR(pool))
659 return PTR_ERR(pool);
660
661 optee = kzalloc(sizeof(*optee), GFP_KERNEL);
662 if (!optee) {
663 rc = -ENOMEM;
664 goto err;
665 }
666
667 optee->invoke_fn = invoke_fn;
668 optee->sec_caps = sec_caps;
669
670 teedev = tee_device_alloc(&optee_desc, NULL, pool, optee);
671 if (IS_ERR(teedev)) {
672 rc = PTR_ERR(teedev);
673 goto err;
674 }
675 optee->teedev = teedev;
676
677 teedev = tee_device_alloc(&optee_supp_desc, NULL, pool, optee);
678 if (IS_ERR(teedev)) {
679 rc = PTR_ERR(teedev);
680 goto err;
681 }
682 optee->supp_teedev = teedev;
683
684 rc = tee_device_register(optee->teedev);
685 if (rc)
686 goto err;
687
688 rc = tee_device_register(optee->supp_teedev);
689 if (rc)
690 goto err;
691
692 mutex_init(&optee->call_queue.mutex);
693 INIT_LIST_HEAD(&optee->call_queue.waiters);
694 optee_wait_queue_init(&optee->wait_queue);
695 optee_supp_init(&optee->supp);
696 optee->memremaped_shm = memremaped_shm;
697 optee->pool = pool;
698
699 optee_enable_shm_cache(optee);
700
701 if (optee->sec_caps & OPTEE_SMC_SEC_CAP_DYNAMIC_SHM)
702 pr_info("dynamic shared memory is enabled\n");
703
704 platform_set_drvdata(pdev, optee);
705
706 rc = optee_enumerate_devices(PTA_CMD_GET_DEVICES);
707 if (rc) {
708 optee_remove(pdev);
709 return rc;
710 }
711
712 pr_info("initialized driver\n");
713 return 0;
714err:
715 if (optee) {
716
717
718
719
720
721 tee_device_unregister(optee->supp_teedev);
722 tee_device_unregister(optee->teedev);
723 kfree(optee);
724 }
725 if (pool)
726 tee_shm_pool_free(pool);
727 if (memremaped_shm)
728 memunmap(memremaped_shm);
729 return rc;
730}
731
732static const struct of_device_id optee_dt_match[] = {
733 { .compatible = "linaro,optee-tz" },
734 {},
735};
736MODULE_DEVICE_TABLE(of, optee_dt_match);
737
738static struct platform_driver optee_driver = {
739 .probe = optee_probe,
740 .remove = optee_remove,
741 .driver = {
742 .name = "optee",
743 .of_match_table = optee_dt_match,
744 },
745};
746module_platform_driver(optee_driver);
747
748MODULE_AUTHOR("Linaro");
749MODULE_DESCRIPTION("OP-TEE driver");
750MODULE_SUPPORTED_DEVICE("");
751MODULE_VERSION("1.0");
752MODULE_LICENSE("GPL v2");
753MODULE_ALIAS("platform:optee");
754
