1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2021, Linaro Limited
6 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
8 #include <linux/arm_ffa.h>
9 #include <linux/errno.h>
10 #include <linux/scatterlist.h>
11 #include <linux/sched.h>
12 #include <linux/slab.h>
13 #include <linux/string.h>
14 #include <linux/tee_drv.h>
15 #include <linux/types.h>
16 #include "optee_private.h"
17 #include "optee_ffa.h"
18 #include "optee_rpc_cmd.h"
21 * This file implement the FF-A ABI used when communicating with secure world
23 * This file is divided into the following sections:
24 * 1. Maintain a hash table for lookup of a global FF-A memory handle
25 * 2. Convert between struct tee_param and struct optee_msg_param
26 * 3. Low level support functions to register shared memory in secure world
27 * 4. Dynamic shared memory pool based on alloc_pages()
28 * 5. Do a normal scheduled call into secure world
29 * 6. Driver initialization.
33 * 1. Maintain a hash table for lookup of a global FF-A memory handle
35 * FF-A assigns a global memory handle for each piece shared memory.
36 * This handle is then used when communicating with secure world.
38 * Main functions are optee_shm_add_ffa_handle() and optee_shm_rem_ffa_handle()
43 struct rhash_head linkage;
46 static void rh_free_fn(void *ptr, void *arg)
51 static const struct rhashtable_params shm_rhash_params = {
52 .head_offset = offsetof(struct shm_rhash, linkage),
53 .key_len = sizeof(u64),
54 .key_offset = offsetof(struct shm_rhash, global_id),
55 .automatic_shrinking = true,
58 static struct tee_shm *optee_shm_from_ffa_handle(struct optee *optee,
61 struct tee_shm *shm = NULL;
64 mutex_lock(&optee->ffa.mutex);
65 r = rhashtable_lookup_fast(&optee->ffa.global_ids, &global_id,
69 mutex_unlock(&optee->ffa.mutex);
74 static int optee_shm_add_ffa_handle(struct optee *optee, struct tee_shm *shm,
80 r = kmalloc(sizeof(*r), GFP_KERNEL);
84 r->global_id = global_id;
86 mutex_lock(&optee->ffa.mutex);
87 rc = rhashtable_lookup_insert_fast(&optee->ffa.global_ids, &r->linkage,
89 mutex_unlock(&optee->ffa.mutex);
97 static int optee_shm_rem_ffa_handle(struct optee *optee, u64 global_id)
102 mutex_lock(&optee->ffa.mutex);
103 r = rhashtable_lookup_fast(&optee->ffa.global_ids, &global_id,
106 rc = rhashtable_remove_fast(&optee->ffa.global_ids,
107 &r->linkage, shm_rhash_params);
108 mutex_unlock(&optee->ffa.mutex);
117 * 2. Convert between struct tee_param and struct optee_msg_param
119 * optee_ffa_from_msg_param() and optee_ffa_to_msg_param() are the main
123 static void from_msg_param_ffa_mem(struct optee *optee, struct tee_param *p,
124 u32 attr, const struct optee_msg_param *mp)
126 struct tee_shm *shm = NULL;
130 p->attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT +
131 attr - OPTEE_MSG_ATTR_TYPE_FMEM_INPUT;
132 p->u.memref.size = mp->u.fmem.size;
134 if (mp->u.fmem.global_id != OPTEE_MSG_FMEM_INVALID_GLOBAL_ID)
135 shm = optee_shm_from_ffa_handle(optee, mp->u.fmem.global_id);
136 p->u.memref.shm = shm;
139 offs_low = mp->u.fmem.offs_low;
140 offs_high = mp->u.fmem.offs_high;
142 p->u.memref.shm_offs = offs_low | offs_high << 32;
146 * optee_ffa_from_msg_param() - convert from OPTEE_MSG parameters to
148 * @optee: main service struct
149 * @params: subsystem internal parameter representation
150 * @num_params: number of elements in the parameter arrays
151 * @msg_params: OPTEE_MSG parameters
153 * Returns 0 on success or <0 on failure
155 static int optee_ffa_from_msg_param(struct optee *optee,
156 struct tee_param *params, size_t num_params,
157 const struct optee_msg_param *msg_params)
161 for (n = 0; n < num_params; n++) {
162 struct tee_param *p = params + n;
163 const struct optee_msg_param *mp = msg_params + n;
164 u32 attr = mp->attr & OPTEE_MSG_ATTR_TYPE_MASK;
167 case OPTEE_MSG_ATTR_TYPE_NONE:
168 p->attr = TEE_IOCTL_PARAM_ATTR_TYPE_NONE;
169 memset(&p->u, 0, sizeof(p->u));
171 case OPTEE_MSG_ATTR_TYPE_VALUE_INPUT:
172 case OPTEE_MSG_ATTR_TYPE_VALUE_OUTPUT:
173 case OPTEE_MSG_ATTR_TYPE_VALUE_INOUT:
174 optee_from_msg_param_value(p, attr, mp);
176 case OPTEE_MSG_ATTR_TYPE_FMEM_INPUT:
177 case OPTEE_MSG_ATTR_TYPE_FMEM_OUTPUT:
178 case OPTEE_MSG_ATTR_TYPE_FMEM_INOUT:
179 from_msg_param_ffa_mem(optee, p, attr, mp);
189 static int to_msg_param_ffa_mem(struct optee_msg_param *mp,
190 const struct tee_param *p)
192 struct tee_shm *shm = p->u.memref.shm;
194 mp->attr = OPTEE_MSG_ATTR_TYPE_FMEM_INPUT + p->attr -
195 TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT;
198 u64 shm_offs = p->u.memref.shm_offs;
200 mp->u.fmem.internal_offs = shm->offset;
202 mp->u.fmem.offs_low = shm_offs;
203 mp->u.fmem.offs_high = shm_offs >> 32;
204 /* Check that the entire offset could be stored. */
205 if (mp->u.fmem.offs_high != shm_offs >> 32)
208 mp->u.fmem.global_id = shm->sec_world_id;
210 memset(&mp->u, 0, sizeof(mp->u));
211 mp->u.fmem.global_id = OPTEE_MSG_FMEM_INVALID_GLOBAL_ID;
213 mp->u.fmem.size = p->u.memref.size;
219 * optee_ffa_to_msg_param() - convert from struct tee_params to OPTEE_MSG
221 * @optee: main service struct
222 * @msg_params: OPTEE_MSG parameters
223 * @num_params: number of elements in the parameter arrays
224 * @params: subsystem itnernal parameter representation
225 * Returns 0 on success or <0 on failure
227 static int optee_ffa_to_msg_param(struct optee *optee,
228 struct optee_msg_param *msg_params,
230 const struct tee_param *params)
234 for (n = 0; n < num_params; n++) {
235 const struct tee_param *p = params + n;
236 struct optee_msg_param *mp = msg_params + n;
239 case TEE_IOCTL_PARAM_ATTR_TYPE_NONE:
240 mp->attr = TEE_IOCTL_PARAM_ATTR_TYPE_NONE;
241 memset(&mp->u, 0, sizeof(mp->u));
243 case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT:
244 case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT:
245 case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT:
246 optee_to_msg_param_value(mp, p);
248 case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT:
249 case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT:
250 case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT:
251 if (to_msg_param_ffa_mem(mp, p))
263 * 3. Low level support functions to register shared memory in secure world
265 * Functions to register and unregister shared memory both for normal
266 * clients and for tee-supplicant.
269 static int optee_ffa_shm_register(struct tee_context *ctx, struct tee_shm *shm,
270 struct page **pages, size_t num_pages,
273 struct optee *optee = tee_get_drvdata(ctx->teedev);
274 struct ffa_device *ffa_dev = optee->ffa.ffa_dev;
275 const struct ffa_mem_ops *mem_ops = ffa_dev->ops->mem_ops;
276 struct ffa_mem_region_attributes mem_attr = {
277 .receiver = ffa_dev->vm_id,
280 struct ffa_mem_ops_args args = {
288 rc = optee_check_mem_type(start, num_pages);
292 rc = sg_alloc_table_from_pages(&sgt, pages, num_pages, 0,
293 num_pages * PAGE_SIZE, GFP_KERNEL);
297 rc = mem_ops->memory_share(&args);
302 rc = optee_shm_add_ffa_handle(optee, shm, args.g_handle);
304 mem_ops->memory_reclaim(args.g_handle, 0);
308 shm->sec_world_id = args.g_handle;
313 static int optee_ffa_shm_unregister(struct tee_context *ctx,
316 struct optee *optee = tee_get_drvdata(ctx->teedev);
317 struct ffa_device *ffa_dev = optee->ffa.ffa_dev;
318 const struct ffa_msg_ops *msg_ops = ffa_dev->ops->msg_ops;
319 const struct ffa_mem_ops *mem_ops = ffa_dev->ops->mem_ops;
320 u64 global_handle = shm->sec_world_id;
321 struct ffa_send_direct_data data = {
322 .data0 = OPTEE_FFA_UNREGISTER_SHM,
323 .data1 = (u32)global_handle,
324 .data2 = (u32)(global_handle >> 32)
328 optee_shm_rem_ffa_handle(optee, global_handle);
329 shm->sec_world_id = 0;
331 rc = msg_ops->sync_send_receive(ffa_dev, &data);
333 pr_err("Unregister SHM id 0x%llx rc %d\n", global_handle, rc);
335 rc = mem_ops->memory_reclaim(global_handle, 0);
337 pr_err("mem_reclaim: 0x%llx %d", global_handle, rc);
342 static int optee_ffa_shm_unregister_supp(struct tee_context *ctx,
345 struct optee *optee = tee_get_drvdata(ctx->teedev);
346 const struct ffa_mem_ops *mem_ops;
347 u64 global_handle = shm->sec_world_id;
351 * We're skipping the OPTEE_FFA_YIELDING_CALL_UNREGISTER_SHM call
352 * since this is OP-TEE freeing via RPC so it has already retired
356 optee_shm_rem_ffa_handle(optee, global_handle);
357 mem_ops = optee->ffa.ffa_dev->ops->mem_ops;
358 rc = mem_ops->memory_reclaim(global_handle, 0);
360 pr_err("mem_reclaim: 0x%llx %d", global_handle, rc);
362 shm->sec_world_id = 0;
368 * 4. Dynamic shared memory pool based on alloc_pages()
370 * Implements an OP-TEE specific shared memory pool.
371 * The main function is optee_ffa_shm_pool_alloc_pages().
374 static int pool_ffa_op_alloc(struct tee_shm_pool *pool,
375 struct tee_shm *shm, size_t size, size_t align)
377 return optee_pool_op_alloc_helper(pool, shm, size, align,
378 optee_ffa_shm_register);
381 static void pool_ffa_op_free(struct tee_shm_pool *pool,
384 optee_pool_op_free_helper(pool, shm, optee_ffa_shm_unregister);
387 static void pool_ffa_op_destroy_pool(struct tee_shm_pool *pool)
392 static const struct tee_shm_pool_ops pool_ffa_ops = {
393 .alloc = pool_ffa_op_alloc,
394 .free = pool_ffa_op_free,
395 .destroy_pool = pool_ffa_op_destroy_pool,
399 * optee_ffa_shm_pool_alloc_pages() - create page-based allocator pool
401 * This pool is used with OP-TEE over FF-A. In this case command buffers
402 * and such are allocated from kernel's own memory.
404 static struct tee_shm_pool *optee_ffa_shm_pool_alloc_pages(void)
406 struct tee_shm_pool *pool = kzalloc(sizeof(*pool), GFP_KERNEL);
409 return ERR_PTR(-ENOMEM);
411 pool->ops = &pool_ffa_ops;
417 * 5. Do a normal scheduled call into secure world
419 * The function optee_ffa_do_call_with_arg() performs a normal scheduled
420 * call into secure world. During this call may normal world request help
421 * from normal world using RPCs, Remote Procedure Calls. This includes
422 * delivery of non-secure interrupts to for instance allow rescheduling of
426 static void handle_ffa_rpc_func_cmd_shm_alloc(struct tee_context *ctx,
428 struct optee_msg_arg *arg)
432 if (arg->num_params != 1 ||
433 arg->params[0].attr != OPTEE_MSG_ATTR_TYPE_VALUE_INPUT) {
434 arg->ret = TEEC_ERROR_BAD_PARAMETERS;
438 switch (arg->params[0].u.value.a) {
439 case OPTEE_RPC_SHM_TYPE_APPL:
440 shm = optee_rpc_cmd_alloc_suppl(ctx, arg->params[0].u.value.b);
442 case OPTEE_RPC_SHM_TYPE_KERNEL:
443 shm = tee_shm_alloc_priv_buf(optee->ctx,
444 arg->params[0].u.value.b);
447 arg->ret = TEEC_ERROR_BAD_PARAMETERS;
452 arg->ret = TEEC_ERROR_OUT_OF_MEMORY;
456 arg->params[0] = (struct optee_msg_param){
457 .attr = OPTEE_MSG_ATTR_TYPE_FMEM_OUTPUT,
458 .u.fmem.size = tee_shm_get_size(shm),
459 .u.fmem.global_id = shm->sec_world_id,
460 .u.fmem.internal_offs = shm->offset,
463 arg->ret = TEEC_SUCCESS;
466 static void handle_ffa_rpc_func_cmd_shm_free(struct tee_context *ctx,
468 struct optee_msg_arg *arg)
472 if (arg->num_params != 1 ||
473 arg->params[0].attr != OPTEE_MSG_ATTR_TYPE_VALUE_INPUT)
476 shm = optee_shm_from_ffa_handle(optee, arg->params[0].u.value.b);
479 switch (arg->params[0].u.value.a) {
480 case OPTEE_RPC_SHM_TYPE_APPL:
481 optee_rpc_cmd_free_suppl(ctx, shm);
483 case OPTEE_RPC_SHM_TYPE_KERNEL:
489 arg->ret = TEEC_SUCCESS;
493 arg->ret = TEEC_ERROR_BAD_PARAMETERS;
496 static void handle_ffa_rpc_func_cmd(struct tee_context *ctx,
498 struct optee_msg_arg *arg)
500 arg->ret_origin = TEEC_ORIGIN_COMMS;
502 case OPTEE_RPC_CMD_SHM_ALLOC:
503 handle_ffa_rpc_func_cmd_shm_alloc(ctx, optee, arg);
505 case OPTEE_RPC_CMD_SHM_FREE:
506 handle_ffa_rpc_func_cmd_shm_free(ctx, optee, arg);
509 optee_rpc_cmd(ctx, optee, arg);
513 static void optee_handle_ffa_rpc(struct tee_context *ctx, struct optee *optee,
514 u32 cmd, struct optee_msg_arg *arg)
517 case OPTEE_FFA_YIELDING_CALL_RETURN_RPC_CMD:
518 handle_ffa_rpc_func_cmd(ctx, optee, arg);
520 case OPTEE_FFA_YIELDING_CALL_RETURN_INTERRUPT:
521 /* Interrupt delivered by now */
524 pr_warn("Unknown RPC func 0x%x\n", cmd);
529 static int optee_ffa_yielding_call(struct tee_context *ctx,
530 struct ffa_send_direct_data *data,
531 struct optee_msg_arg *rpc_arg)
533 struct optee *optee = tee_get_drvdata(ctx->teedev);
534 struct ffa_device *ffa_dev = optee->ffa.ffa_dev;
535 const struct ffa_msg_ops *msg_ops = ffa_dev->ops->msg_ops;
536 struct optee_call_waiter w;
537 u32 cmd = data->data0;
538 u32 w4 = data->data1;
539 u32 w5 = data->data2;
540 u32 w6 = data->data3;
543 /* Initialize waiter */
544 optee_cq_wait_init(&optee->call_queue, &w);
546 rc = msg_ops->sync_send_receive(ffa_dev, data);
550 switch ((int)data->data0) {
553 case TEEC_ERROR_BUSY:
554 if (cmd == OPTEE_FFA_YIELDING_CALL_RESUME) {
560 * Out of threads in secure world, wait for a thread
563 optee_cq_wait_for_completion(&optee->call_queue, &w);
574 if (data->data1 == OPTEE_FFA_YIELDING_CALL_RETURN_DONE)
578 * OP-TEE has returned with a RPC request.
580 * Note that data->data4 (passed in register w7) is already
581 * filled in by ffa_mem_ops->sync_send_receive() returning
585 optee_handle_ffa_rpc(ctx, optee, data->data1, rpc_arg);
586 cmd = OPTEE_FFA_YIELDING_CALL_RESUME;
594 * We're done with our thread in secure world, if there's any
595 * thread waiters wake up one.
597 optee_cq_wait_final(&optee->call_queue, &w);
603 * optee_ffa_do_call_with_arg() - Do a FF-A call to enter OP-TEE in secure world
604 * @ctx: calling context
605 * @shm: shared memory holding the message to pass to secure world
606 * @offs: offset of the message in @shm
608 * Does a FF-A call to OP-TEE in secure world and handles eventual resulting
609 * Remote Procedure Calls (RPC) from OP-TEE.
611 * Returns return code from FF-A, 0 is OK
614 static int optee_ffa_do_call_with_arg(struct tee_context *ctx,
615 struct tee_shm *shm, u_int offs)
617 struct ffa_send_direct_data data = {
618 .data0 = OPTEE_FFA_YIELDING_CALL_WITH_ARG,
619 .data1 = (u32)shm->sec_world_id,
620 .data2 = (u32)(shm->sec_world_id >> 32),
623 struct optee_msg_arg *arg;
624 unsigned int rpc_arg_offs;
625 struct optee_msg_arg *rpc_arg;
628 * The shared memory object has to start on a page when passed as
629 * an argument struct. This is also what the shm pool allocator
630 * returns, but check this before calling secure world to catch
631 * eventual errors early in case something changes.
636 arg = tee_shm_get_va(shm, offs);
640 rpc_arg_offs = OPTEE_MSG_GET_ARG_SIZE(arg->num_params);
641 rpc_arg = tee_shm_get_va(shm, offs + rpc_arg_offs);
643 return PTR_ERR(rpc_arg);
645 return optee_ffa_yielding_call(ctx, &data, rpc_arg);
649 * 6. Driver initialization
651 * During driver inititialization is the OP-TEE Secure Partition is probed
652 * to find out which features it supports so the driver can be initialized
653 * with a matching configuration.
656 static bool optee_ffa_api_is_compatbile(struct ffa_device *ffa_dev,
657 const struct ffa_ops *ops)
659 const struct ffa_msg_ops *msg_ops = ops->msg_ops;
660 struct ffa_send_direct_data data = { OPTEE_FFA_GET_API_VERSION };
663 msg_ops->mode_32bit_set(ffa_dev);
665 rc = msg_ops->sync_send_receive(ffa_dev, &data);
667 pr_err("Unexpected error %d\n", rc);
670 if (data.data0 != OPTEE_FFA_VERSION_MAJOR ||
671 data.data1 < OPTEE_FFA_VERSION_MINOR) {
672 pr_err("Incompatible OP-TEE API version %lu.%lu",
673 data.data0, data.data1);
677 data = (struct ffa_send_direct_data){ OPTEE_FFA_GET_OS_VERSION };
678 rc = msg_ops->sync_send_receive(ffa_dev, &data);
680 pr_err("Unexpected error %d\n", rc);
684 pr_info("revision %lu.%lu (%08lx)",
685 data.data0, data.data1, data.data2);
687 pr_info("revision %lu.%lu", data.data0, data.data1);
692 static bool optee_ffa_exchange_caps(struct ffa_device *ffa_dev,
693 const struct ffa_ops *ops,
695 unsigned int *rpc_param_count)
697 struct ffa_send_direct_data data = { OPTEE_FFA_EXCHANGE_CAPABILITIES };
700 rc = ops->msg_ops->sync_send_receive(ffa_dev, &data);
702 pr_err("Unexpected error %d", rc);
706 pr_err("Unexpected exchange error %lu", data.data0);
710 *rpc_param_count = (u8)data.data1;
711 *sec_caps = data.data2;
716 static void optee_ffa_get_version(struct tee_device *teedev,
717 struct tee_ioctl_version_data *vers)
719 struct tee_ioctl_version_data v = {
720 .impl_id = TEE_IMPL_ID_OPTEE,
721 .impl_caps = TEE_OPTEE_CAP_TZ,
722 .gen_caps = TEE_GEN_CAP_GP | TEE_GEN_CAP_REG_MEM |
723 TEE_GEN_CAP_MEMREF_NULL,
729 static int optee_ffa_open(struct tee_context *ctx)
731 return optee_open(ctx, true);
734 static const struct tee_driver_ops optee_ffa_clnt_ops = {
735 .get_version = optee_ffa_get_version,
736 .open = optee_ffa_open,
737 .release = optee_release,
738 .open_session = optee_open_session,
739 .close_session = optee_close_session,
740 .invoke_func = optee_invoke_func,
741 .cancel_req = optee_cancel_req,
742 .shm_register = optee_ffa_shm_register,
743 .shm_unregister = optee_ffa_shm_unregister,
746 static const struct tee_desc optee_ffa_clnt_desc = {
747 .name = DRIVER_NAME "-ffa-clnt",
748 .ops = &optee_ffa_clnt_ops,
749 .owner = THIS_MODULE,
752 static const struct tee_driver_ops optee_ffa_supp_ops = {
753 .get_version = optee_ffa_get_version,
754 .open = optee_ffa_open,
755 .release = optee_release_supp,
756 .supp_recv = optee_supp_recv,
757 .supp_send = optee_supp_send,
758 .shm_register = optee_ffa_shm_register, /* same as for clnt ops */
759 .shm_unregister = optee_ffa_shm_unregister_supp,
762 static const struct tee_desc optee_ffa_supp_desc = {
763 .name = DRIVER_NAME "-ffa-supp",
764 .ops = &optee_ffa_supp_ops,
765 .owner = THIS_MODULE,
766 .flags = TEE_DESC_PRIVILEGED,
769 static const struct optee_ops optee_ffa_ops = {
770 .do_call_with_arg = optee_ffa_do_call_with_arg,
771 .to_msg_param = optee_ffa_to_msg_param,
772 .from_msg_param = optee_ffa_from_msg_param,
775 static void optee_ffa_remove(struct ffa_device *ffa_dev)
777 struct optee *optee = ffa_dev_get_drvdata(ffa_dev);
779 optee_remove_common(optee);
781 mutex_destroy(&optee->ffa.mutex);
782 rhashtable_free_and_destroy(&optee->ffa.global_ids, rh_free_fn, NULL);
787 static int optee_ffa_probe(struct ffa_device *ffa_dev)
789 const struct ffa_ops *ffa_ops;
790 unsigned int rpc_param_count;
791 struct tee_shm_pool *pool;
792 struct tee_device *teedev;
793 struct tee_context *ctx;
794 u32 arg_cache_flags = 0;
799 ffa_ops = ffa_dev->ops;
801 if (!optee_ffa_api_is_compatbile(ffa_dev, ffa_ops))
804 if (!optee_ffa_exchange_caps(ffa_dev, ffa_ops, &sec_caps,
807 if (sec_caps & OPTEE_FFA_SEC_CAP_ARG_OFFSET)
808 arg_cache_flags |= OPTEE_SHM_ARG_SHARED;
810 optee = kzalloc(sizeof(*optee), GFP_KERNEL);
814 pool = optee_ffa_shm_pool_alloc_pages();
821 optee->ops = &optee_ffa_ops;
822 optee->ffa.ffa_dev = ffa_dev;
823 optee->rpc_param_count = rpc_param_count;
825 teedev = tee_device_alloc(&optee_ffa_clnt_desc, NULL, optee->pool,
827 if (IS_ERR(teedev)) {
828 rc = PTR_ERR(teedev);
831 optee->teedev = teedev;
833 teedev = tee_device_alloc(&optee_ffa_supp_desc, NULL, optee->pool,
835 if (IS_ERR(teedev)) {
836 rc = PTR_ERR(teedev);
837 goto err_unreg_teedev;
839 optee->supp_teedev = teedev;
841 rc = tee_device_register(optee->teedev);
843 goto err_unreg_supp_teedev;
845 rc = tee_device_register(optee->supp_teedev);
847 goto err_unreg_supp_teedev;
849 rc = rhashtable_init(&optee->ffa.global_ids, &shm_rhash_params);
851 goto err_unreg_supp_teedev;
852 mutex_init(&optee->ffa.mutex);
853 mutex_init(&optee->call_queue.mutex);
854 INIT_LIST_HEAD(&optee->call_queue.waiters);
855 optee_supp_init(&optee->supp);
856 optee_shm_arg_cache_init(optee, arg_cache_flags);
857 ffa_dev_set_drvdata(ffa_dev, optee);
858 ctx = teedev_open(optee->teedev);
861 goto err_rhashtable_free;
864 rc = optee_notif_init(optee, OPTEE_DEFAULT_MAX_NOTIF_VALUE);
868 rc = optee_enumerate_devices(PTA_CMD_GET_DEVICES);
870 goto err_unregister_devices;
872 pr_info("initialized driver\n");
875 err_unregister_devices:
876 optee_unregister_devices();
877 optee_notif_uninit(optee);
879 teedev_close_context(ctx);
881 rhashtable_free_and_destroy(&optee->ffa.global_ids, rh_free_fn, NULL);
882 optee_supp_uninit(&optee->supp);
883 mutex_destroy(&optee->call_queue.mutex);
884 mutex_destroy(&optee->ffa.mutex);
885 err_unreg_supp_teedev:
886 tee_device_unregister(optee->supp_teedev);
888 tee_device_unregister(optee->teedev);
890 tee_shm_pool_free(pool);
896 static const struct ffa_device_id optee_ffa_device_id[] = {
897 /* 486178e0-e7f8-11e3-bc5e0002a5d5c51b */
898 { UUID_INIT(0x486178e0, 0xe7f8, 0x11e3,
899 0xbc, 0x5e, 0x00, 0x02, 0xa5, 0xd5, 0xc5, 0x1b) },
903 static struct ffa_driver optee_ffa_driver = {
905 .probe = optee_ffa_probe,
906 .remove = optee_ffa_remove,
907 .id_table = optee_ffa_device_id,
910 int optee_ffa_abi_register(void)
912 if (IS_REACHABLE(CONFIG_ARM_FFA_TRANSPORT))
913 return ffa_register(&optee_ffa_driver);
918 void optee_ffa_abi_unregister(void)
920 if (IS_REACHABLE(CONFIG_ARM_FFA_TRANSPORT))
921 ffa_unregister(&optee_ffa_driver);