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optee: add FF-A support
Adds support for using FF-A [1] as transport to the OP-TEE driver. Introduces struct optee_msg_param_fmem which carries all information needed when OP-TEE is calling FFA_MEM_RETRIEVE_REQ to get the shared memory reference mapped by the hypervisor in S-EL2. Register usage is also updated to include the information needed. The FF-A part of this driver is enabled if CONFIG_ARM_FFA_TRANSPORT is enabled. [1] https://developer.arm.com/documentation/den0077/latest Acked-by: Sumit Garg <sumit.garg@linaro.org> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
This commit is contained in:
Jens Wiklander
parent
c51a564a5b
commit
4615e5a34b
@ -6,6 +6,7 @@ optee-objs += rpc.o
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optee-objs += supp.o
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optee-objs += device.o
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optee-objs += smc_abi.o
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optee-objs += ffa_abi.o
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# for tracing framework to find optee_trace.h
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CFLAGS_smc_abi.o := -I$(src)
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@ -107,11 +107,20 @@ static struct optee_session *find_session(struct optee_context_data *ctxdata,
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struct tee_shm *optee_get_msg_arg(struct tee_context *ctx, size_t num_params,
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struct optee_msg_arg **msg_arg)
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{
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struct optee *optee = tee_get_drvdata(ctx->teedev);
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size_t sz = OPTEE_MSG_GET_ARG_SIZE(num_params);
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struct tee_shm *shm;
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struct optee_msg_arg *ma;
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shm = tee_shm_alloc(ctx, OPTEE_MSG_GET_ARG_SIZE(num_params),
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TEE_SHM_MAPPED | TEE_SHM_PRIV);
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/*
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* rpc_arg_count is set to the number of allocated parameters in
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* the RPC argument struct if a second MSG arg struct is expected.
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* The second arg struct will then be used for RPC.
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*/
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if (optee->rpc_arg_count)
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sz += OPTEE_MSG_GET_ARG_SIZE(optee->rpc_arg_count);
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shm = tee_shm_alloc(ctx, sz, TEE_SHM_MAPPED | TEE_SHM_PRIV);
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if (IS_ERR(shm))
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return shm;
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@ -172,6 +172,9 @@ void optee_remove_common(struct optee *optee)
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mutex_destroy(&optee->call_queue.mutex);
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}
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static int smc_abi_rc;
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static int ffa_abi_rc;
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static int optee_core_init(void)
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{
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/*
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@ -184,13 +187,22 @@ static int optee_core_init(void)
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if (is_kdump_kernel())
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return -ENODEV;
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return optee_smc_abi_register();
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smc_abi_rc = optee_smc_abi_register();
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ffa_abi_rc = optee_ffa_abi_register();
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/* If both failed there's no point with this module */
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if (smc_abi_rc && ffa_abi_rc)
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return smc_abi_rc;
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return 0;
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}
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module_init(optee_core_init);
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static void optee_core_exit(void)
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{
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optee_smc_abi_unregister();
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if (!smc_abi_rc)
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optee_smc_abi_unregister();
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if (!ffa_abi_rc)
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optee_ffa_abi_unregister();
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}
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module_exit(optee_core_exit);
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911
drivers/tee/optee/ffa_abi.c
Normal file
911
drivers/tee/optee/ffa_abi.c
Normal file
@ -0,0 +1,911 @@
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2021, Linaro Limited
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/arm_ffa.h>
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#include <linux/errno.h>
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#include <linux/scatterlist.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/tee_drv.h>
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#include <linux/types.h>
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#include "optee_private.h"
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#include "optee_ffa.h"
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#include "optee_rpc_cmd.h"
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/*
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* This file implement the FF-A ABI used when communicating with secure world
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* OP-TEE OS via FF-A.
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* This file is divided into the following sections:
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* 1. Maintain a hash table for lookup of a global FF-A memory handle
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* 2. Convert between struct tee_param and struct optee_msg_param
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* 3. Low level support functions to register shared memory in secure world
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* 4. Dynamic shared memory pool based on alloc_pages()
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* 5. Do a normal scheduled call into secure world
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* 6. Driver initialization.
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*/
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/*
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* 1. Maintain a hash table for lookup of a global FF-A memory handle
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*
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* FF-A assigns a global memory handle for each piece shared memory.
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* This handle is then used when communicating with secure world.
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*
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* Main functions are optee_shm_add_ffa_handle() and optee_shm_rem_ffa_handle()
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*/
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struct shm_rhash {
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struct tee_shm *shm;
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u64 global_id;
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struct rhash_head linkage;
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};
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static void rh_free_fn(void *ptr, void *arg)
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{
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kfree(ptr);
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}
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static const struct rhashtable_params shm_rhash_params = {
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.head_offset = offsetof(struct shm_rhash, linkage),
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.key_len = sizeof(u64),
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.key_offset = offsetof(struct shm_rhash, global_id),
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.automatic_shrinking = true,
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};
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static struct tee_shm *optee_shm_from_ffa_handle(struct optee *optee,
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u64 global_id)
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{
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struct tee_shm *shm = NULL;
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struct shm_rhash *r;
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mutex_lock(&optee->ffa.mutex);
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r = rhashtable_lookup_fast(&optee->ffa.global_ids, &global_id,
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shm_rhash_params);
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if (r)
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shm = r->shm;
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mutex_unlock(&optee->ffa.mutex);
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return shm;
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}
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static int optee_shm_add_ffa_handle(struct optee *optee, struct tee_shm *shm,
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u64 global_id)
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{
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struct shm_rhash *r;
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int rc;
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r = kmalloc(sizeof(*r), GFP_KERNEL);
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if (!r)
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return -ENOMEM;
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r->shm = shm;
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r->global_id = global_id;
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mutex_lock(&optee->ffa.mutex);
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rc = rhashtable_lookup_insert_fast(&optee->ffa.global_ids, &r->linkage,
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shm_rhash_params);
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mutex_unlock(&optee->ffa.mutex);
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if (rc)
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kfree(r);
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return rc;
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}
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static int optee_shm_rem_ffa_handle(struct optee *optee, u64 global_id)
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{
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struct shm_rhash *r;
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int rc = -ENOENT;
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mutex_lock(&optee->ffa.mutex);
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r = rhashtable_lookup_fast(&optee->ffa.global_ids, &global_id,
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shm_rhash_params);
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if (r)
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rc = rhashtable_remove_fast(&optee->ffa.global_ids,
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&r->linkage, shm_rhash_params);
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mutex_unlock(&optee->ffa.mutex);
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if (!rc)
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kfree(r);
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return rc;
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}
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/*
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* 2. Convert between struct tee_param and struct optee_msg_param
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*
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* optee_ffa_from_msg_param() and optee_ffa_to_msg_param() are the main
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* functions.
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*/
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static void from_msg_param_ffa_mem(struct optee *optee, struct tee_param *p,
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u32 attr, const struct optee_msg_param *mp)
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{
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struct tee_shm *shm = NULL;
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u64 offs_high = 0;
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u64 offs_low = 0;
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p->attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT +
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attr - OPTEE_MSG_ATTR_TYPE_FMEM_INPUT;
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p->u.memref.size = mp->u.fmem.size;
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if (mp->u.fmem.global_id != OPTEE_MSG_FMEM_INVALID_GLOBAL_ID)
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shm = optee_shm_from_ffa_handle(optee, mp->u.fmem.global_id);
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p->u.memref.shm = shm;
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if (shm) {
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offs_low = mp->u.fmem.offs_low;
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offs_high = mp->u.fmem.offs_high;
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}
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p->u.memref.shm_offs = offs_low | offs_high << 32;
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}
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/**
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* optee_ffa_from_msg_param() - convert from OPTEE_MSG parameters to
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* struct tee_param
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* @optee: main service struct
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* @params: subsystem internal parameter representation
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* @num_params: number of elements in the parameter arrays
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* @msg_params: OPTEE_MSG parameters
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*
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* Returns 0 on success or <0 on failure
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*/
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static int optee_ffa_from_msg_param(struct optee *optee,
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struct tee_param *params, size_t num_params,
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const struct optee_msg_param *msg_params)
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{
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size_t n;
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for (n = 0; n < num_params; n++) {
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struct tee_param *p = params + n;
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const struct optee_msg_param *mp = msg_params + n;
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u32 attr = mp->attr & OPTEE_MSG_ATTR_TYPE_MASK;
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switch (attr) {
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case OPTEE_MSG_ATTR_TYPE_NONE:
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p->attr = TEE_IOCTL_PARAM_ATTR_TYPE_NONE;
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memset(&p->u, 0, sizeof(p->u));
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break;
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case OPTEE_MSG_ATTR_TYPE_VALUE_INPUT:
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case OPTEE_MSG_ATTR_TYPE_VALUE_OUTPUT:
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case OPTEE_MSG_ATTR_TYPE_VALUE_INOUT:
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optee_from_msg_param_value(p, attr, mp);
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break;
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case OPTEE_MSG_ATTR_TYPE_FMEM_INPUT:
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case OPTEE_MSG_ATTR_TYPE_FMEM_OUTPUT:
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case OPTEE_MSG_ATTR_TYPE_FMEM_INOUT:
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from_msg_param_ffa_mem(optee, p, attr, mp);
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break;
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default:
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return -EINVAL;
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}
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}
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return 0;
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}
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static int to_msg_param_ffa_mem(struct optee_msg_param *mp,
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const struct tee_param *p)
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{
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struct tee_shm *shm = p->u.memref.shm;
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mp->attr = OPTEE_MSG_ATTR_TYPE_FMEM_INPUT + p->attr -
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TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT;
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if (shm) {
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u64 shm_offs = p->u.memref.shm_offs;
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mp->u.fmem.internal_offs = shm->offset;
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mp->u.fmem.offs_low = shm_offs;
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mp->u.fmem.offs_high = shm_offs >> 32;
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/* Check that the entire offset could be stored. */
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if (mp->u.fmem.offs_high != shm_offs >> 32)
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return -EINVAL;
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mp->u.fmem.global_id = shm->sec_world_id;
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} else {
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memset(&mp->u, 0, sizeof(mp->u));
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mp->u.fmem.global_id = OPTEE_MSG_FMEM_INVALID_GLOBAL_ID;
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}
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mp->u.fmem.size = p->u.memref.size;
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return 0;
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}
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/**
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* optee_ffa_to_msg_param() - convert from struct tee_params to OPTEE_MSG
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* parameters
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* @optee: main service struct
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* @msg_params: OPTEE_MSG parameters
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* @num_params: number of elements in the parameter arrays
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* @params: subsystem itnernal parameter representation
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* Returns 0 on success or <0 on failure
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*/
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static int optee_ffa_to_msg_param(struct optee *optee,
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struct optee_msg_param *msg_params,
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size_t num_params,
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const struct tee_param *params)
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{
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size_t n;
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for (n = 0; n < num_params; n++) {
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const struct tee_param *p = params + n;
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struct optee_msg_param *mp = msg_params + n;
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switch (p->attr) {
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case TEE_IOCTL_PARAM_ATTR_TYPE_NONE:
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mp->attr = TEE_IOCTL_PARAM_ATTR_TYPE_NONE;
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memset(&mp->u, 0, sizeof(mp->u));
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break;
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case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT:
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case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT:
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case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT:
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optee_to_msg_param_value(mp, p);
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break;
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case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT:
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case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT:
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case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT:
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if (to_msg_param_ffa_mem(mp, p))
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return -EINVAL;
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break;
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default:
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return -EINVAL;
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}
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}
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return 0;
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}
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/*
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* 3. Low level support functions to register shared memory in secure world
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*
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* Functions to register and unregister shared memory both for normal
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* clients and for tee-supplicant.
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*/
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static int optee_ffa_shm_register(struct tee_context *ctx, struct tee_shm *shm,
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struct page **pages, size_t num_pages,
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unsigned long start)
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{
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struct optee *optee = tee_get_drvdata(ctx->teedev);
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const struct ffa_dev_ops *ffa_ops = optee->ffa.ffa_ops;
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struct ffa_device *ffa_dev = optee->ffa.ffa_dev;
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struct ffa_mem_region_attributes mem_attr = {
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.receiver = ffa_dev->vm_id,
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.attrs = FFA_MEM_RW,
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};
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struct ffa_mem_ops_args args = {
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.use_txbuf = true,
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.attrs = &mem_attr,
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.nattrs = 1,
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};
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struct sg_table sgt;
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int rc;
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rc = optee_check_mem_type(start, num_pages);
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if (rc)
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return rc;
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rc = sg_alloc_table_from_pages(&sgt, pages, num_pages, 0,
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num_pages * PAGE_SIZE, GFP_KERNEL);
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if (rc)
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return rc;
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args.sg = sgt.sgl;
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rc = ffa_ops->memory_share(ffa_dev, &args);
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sg_free_table(&sgt);
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if (rc)
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return rc;
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rc = optee_shm_add_ffa_handle(optee, shm, args.g_handle);
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if (rc) {
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ffa_ops->memory_reclaim(args.g_handle, 0);
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return rc;
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}
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shm->sec_world_id = args.g_handle;
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return 0;
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}
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static int optee_ffa_shm_unregister(struct tee_context *ctx,
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struct tee_shm *shm)
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{
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struct optee *optee = tee_get_drvdata(ctx->teedev);
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const struct ffa_dev_ops *ffa_ops = optee->ffa.ffa_ops;
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struct ffa_device *ffa_dev = optee->ffa.ffa_dev;
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u64 global_handle = shm->sec_world_id;
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struct ffa_send_direct_data data = {
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.data0 = OPTEE_FFA_UNREGISTER_SHM,
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.data1 = (u32)global_handle,
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.data2 = (u32)(global_handle >> 32)
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};
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int rc;
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optee_shm_rem_ffa_handle(optee, global_handle);
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shm->sec_world_id = 0;
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rc = ffa_ops->sync_send_receive(ffa_dev, &data);
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if (rc)
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pr_err("Unregister SHM id 0x%llx rc %d\n", global_handle, rc);
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rc = ffa_ops->memory_reclaim(global_handle, 0);
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if (rc)
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pr_err("mem_reclain: 0x%llx %d", global_handle, rc);
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return rc;
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}
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static int optee_ffa_shm_unregister_supp(struct tee_context *ctx,
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struct tee_shm *shm)
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{
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struct optee *optee = tee_get_drvdata(ctx->teedev);
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const struct ffa_dev_ops *ffa_ops = optee->ffa.ffa_ops;
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u64 global_handle = shm->sec_world_id;
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int rc;
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/*
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* We're skipping the OPTEE_FFA_YIELDING_CALL_UNREGISTER_SHM call
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* since this is OP-TEE freeing via RPC so it has already retired
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* this ID.
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*/
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optee_shm_rem_ffa_handle(optee, global_handle);
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rc = ffa_ops->memory_reclaim(global_handle, 0);
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if (rc)
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pr_err("mem_reclain: 0x%llx %d", global_handle, rc);
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shm->sec_world_id = 0;
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return rc;
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}
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/*
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* 4. Dynamic shared memory pool based on alloc_pages()
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*
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* Implements an OP-TEE specific shared memory pool.
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* The main function is optee_ffa_shm_pool_alloc_pages().
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*/
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static int pool_ffa_op_alloc(struct tee_shm_pool_mgr *poolm,
|
||||
struct tee_shm *shm, size_t size)
|
||||
{
|
||||
return optee_pool_op_alloc_helper(poolm, shm, size,
|
||||
optee_ffa_shm_register);
|
||||
}
|
||||
|
||||
static void pool_ffa_op_free(struct tee_shm_pool_mgr *poolm,
|
||||
struct tee_shm *shm)
|
||||
{
|
||||
optee_ffa_shm_unregister(shm->ctx, shm);
|
||||
free_pages((unsigned long)shm->kaddr, get_order(shm->size));
|
||||
shm->kaddr = NULL;
|
||||
}
|
||||
|
||||
static void pool_ffa_op_destroy_poolmgr(struct tee_shm_pool_mgr *poolm)
|
||||
{
|
||||
kfree(poolm);
|
||||
}
|
||||
|
||||
static const struct tee_shm_pool_mgr_ops pool_ffa_ops = {
|
||||
.alloc = pool_ffa_op_alloc,
|
||||
.free = pool_ffa_op_free,
|
||||
.destroy_poolmgr = pool_ffa_op_destroy_poolmgr,
|
||||
};
|
||||
|
||||
/**
|
||||
* optee_ffa_shm_pool_alloc_pages() - create page-based allocator pool
|
||||
*
|
||||
* This pool is used with OP-TEE over FF-A. In this case command buffers
|
||||
* and such are allocated from kernel's own memory.
|
||||
*/
|
||||
static struct tee_shm_pool_mgr *optee_ffa_shm_pool_alloc_pages(void)
|
||||
{
|
||||
struct tee_shm_pool_mgr *mgr = kzalloc(sizeof(*mgr), GFP_KERNEL);
|
||||
|
||||
if (!mgr)
|
||||
return ERR_PTR(-ENOMEM);
|
||||
|
||||
mgr->ops = &pool_ffa_ops;
|
||||
|
||||
return mgr;
|
||||
}
|
||||
|
||||
/*
|
||||
* 5. Do a normal scheduled call into secure world
|
||||
*
|
||||
* The function optee_ffa_do_call_with_arg() performs a normal scheduled
|
||||
* call into secure world. During this call may normal world request help
|
||||
* from normal world using RPCs, Remote Procedure Calls. This includes
|
||||
* delivery of non-secure interrupts to for instance allow rescheduling of
|
||||
* the current task.
|
||||
*/
|
||||
|
||||
static void handle_ffa_rpc_func_cmd_shm_alloc(struct tee_context *ctx,
|
||||
struct optee_msg_arg *arg)
|
||||
{
|
||||
struct tee_shm *shm;
|
||||
|
||||
if (arg->num_params != 1 ||
|
||||
arg->params[0].attr != OPTEE_MSG_ATTR_TYPE_VALUE_INPUT) {
|
||||
arg->ret = TEEC_ERROR_BAD_PARAMETERS;
|
||||
return;
|
||||
}
|
||||
|
||||
switch (arg->params[0].u.value.a) {
|
||||
case OPTEE_RPC_SHM_TYPE_APPL:
|
||||
shm = optee_rpc_cmd_alloc_suppl(ctx, arg->params[0].u.value.b);
|
||||
break;
|
||||
case OPTEE_RPC_SHM_TYPE_KERNEL:
|
||||
shm = tee_shm_alloc(ctx, arg->params[0].u.value.b,
|
||||
TEE_SHM_MAPPED | TEE_SHM_PRIV);
|
||||
break;
|
||||
default:
|
||||
arg->ret = TEEC_ERROR_BAD_PARAMETERS;
|
||||
return;
|
||||
}
|
||||
|
||||
if (IS_ERR(shm)) {
|
||||
arg->ret = TEEC_ERROR_OUT_OF_MEMORY;
|
||||
return;
|
||||
}
|
||||
|
||||
arg->params[0] = (struct optee_msg_param){
|
||||
.attr = OPTEE_MSG_ATTR_TYPE_FMEM_OUTPUT,
|
||||
.u.fmem.size = tee_shm_get_size(shm),
|
||||
.u.fmem.global_id = shm->sec_world_id,
|
||||
.u.fmem.internal_offs = shm->offset,
|
||||
};
|
||||
|
||||
arg->ret = TEEC_SUCCESS;
|
||||
}
|
||||
|
||||
static void handle_ffa_rpc_func_cmd_shm_free(struct tee_context *ctx,
|
||||
struct optee *optee,
|
||||
struct optee_msg_arg *arg)
|
||||
{
|
||||
struct tee_shm *shm;
|
||||
|
||||
if (arg->num_params != 1 ||
|
||||
arg->params[0].attr != OPTEE_MSG_ATTR_TYPE_VALUE_INPUT)
|
||||
goto err_bad_param;
|
||||
|
||||
shm = optee_shm_from_ffa_handle(optee, arg->params[0].u.value.b);
|
||||
if (!shm)
|
||||
goto err_bad_param;
|
||||
switch (arg->params[0].u.value.a) {
|
||||
case OPTEE_RPC_SHM_TYPE_APPL:
|
||||
optee_rpc_cmd_free_suppl(ctx, shm);
|
||||
break;
|
||||
case OPTEE_RPC_SHM_TYPE_KERNEL:
|
||||
tee_shm_free(shm);
|
||||
break;
|
||||
default:
|
||||
goto err_bad_param;
|
||||
}
|
||||
arg->ret = TEEC_SUCCESS;
|
||||
return;
|
||||
|
||||
err_bad_param:
|
||||
arg->ret = TEEC_ERROR_BAD_PARAMETERS;
|
||||
}
|
||||
|
||||
static void handle_ffa_rpc_func_cmd(struct tee_context *ctx,
|
||||
struct optee_msg_arg *arg)
|
||||
{
|
||||
struct optee *optee = tee_get_drvdata(ctx->teedev);
|
||||
|
||||
arg->ret_origin = TEEC_ORIGIN_COMMS;
|
||||
switch (arg->cmd) {
|
||||
case OPTEE_RPC_CMD_SHM_ALLOC:
|
||||
handle_ffa_rpc_func_cmd_shm_alloc(ctx, arg);
|
||||
break;
|
||||
case OPTEE_RPC_CMD_SHM_FREE:
|
||||
handle_ffa_rpc_func_cmd_shm_free(ctx, optee, arg);
|
||||
break;
|
||||
default:
|
||||
optee_rpc_cmd(ctx, optee, arg);
|
||||
}
|
||||
}
|
||||
|
||||
static void optee_handle_ffa_rpc(struct tee_context *ctx, u32 cmd,
|
||||
struct optee_msg_arg *arg)
|
||||
{
|
||||
switch (cmd) {
|
||||
case OPTEE_FFA_YIELDING_CALL_RETURN_RPC_CMD:
|
||||
handle_ffa_rpc_func_cmd(ctx, arg);
|
||||
break;
|
||||
case OPTEE_FFA_YIELDING_CALL_RETURN_INTERRUPT:
|
||||
/* Interrupt delivered by now */
|
||||
break;
|
||||
default:
|
||||
pr_warn("Unknown RPC func 0x%x\n", cmd);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
static int optee_ffa_yielding_call(struct tee_context *ctx,
|
||||
struct ffa_send_direct_data *data,
|
||||
struct optee_msg_arg *rpc_arg)
|
||||
{
|
||||
struct optee *optee = tee_get_drvdata(ctx->teedev);
|
||||
const struct ffa_dev_ops *ffa_ops = optee->ffa.ffa_ops;
|
||||
struct ffa_device *ffa_dev = optee->ffa.ffa_dev;
|
||||
struct optee_call_waiter w;
|
||||
u32 cmd = data->data0;
|
||||
u32 w4 = data->data1;
|
||||
u32 w5 = data->data2;
|
||||
u32 w6 = data->data3;
|
||||
int rc;
|
||||
|
||||
/* Initialize waiter */
|
||||
optee_cq_wait_init(&optee->call_queue, &w);
|
||||
while (true) {
|
||||
rc = ffa_ops->sync_send_receive(ffa_dev, data);
|
||||
if (rc)
|
||||
goto done;
|
||||
|
||||
switch ((int)data->data0) {
|
||||
case TEEC_SUCCESS:
|
||||
break;
|
||||
case TEEC_ERROR_BUSY:
|
||||
if (cmd == OPTEE_FFA_YIELDING_CALL_RESUME) {
|
||||
rc = -EIO;
|
||||
goto done;
|
||||
}
|
||||
|
||||
/*
|
||||
* Out of threads in secure world, wait for a thread
|
||||
* become available.
|
||||
*/
|
||||
optee_cq_wait_for_completion(&optee->call_queue, &w);
|
||||
data->data0 = cmd;
|
||||
data->data1 = w4;
|
||||
data->data2 = w5;
|
||||
data->data3 = w6;
|
||||
continue;
|
||||
default:
|
||||
rc = -EIO;
|
||||
goto done;
|
||||
}
|
||||
|
||||
if (data->data1 == OPTEE_FFA_YIELDING_CALL_RETURN_DONE)
|
||||
goto done;
|
||||
|
||||
/*
|
||||
* OP-TEE has returned with a RPC request.
|
||||
*
|
||||
* Note that data->data4 (passed in register w7) is already
|
||||
* filled in by ffa_ops->sync_send_receive() returning
|
||||
* above.
|
||||
*/
|
||||
cond_resched();
|
||||
optee_handle_ffa_rpc(ctx, data->data1, rpc_arg);
|
||||
cmd = OPTEE_FFA_YIELDING_CALL_RESUME;
|
||||
data->data0 = cmd;
|
||||
data->data1 = 0;
|
||||
data->data2 = 0;
|
||||
data->data3 = 0;
|
||||
}
|
||||
done:
|
||||
/*
|
||||
* We're done with our thread in secure world, if there's any
|
||||
* thread waiters wake up one.
|
||||
*/
|
||||
optee_cq_wait_final(&optee->call_queue, &w);
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
/**
|
||||
* optee_ffa_do_call_with_arg() - Do a FF-A call to enter OP-TEE in secure world
|
||||
* @ctx: calling context
|
||||
* @shm: shared memory holding the message to pass to secure world
|
||||
*
|
||||
* Does a FF-A call to OP-TEE in secure world and handles eventual resulting
|
||||
* Remote Procedure Calls (RPC) from OP-TEE.
|
||||
*
|
||||
* Returns return code from FF-A, 0 is OK
|
||||
*/
|
||||
|
||||
static int optee_ffa_do_call_with_arg(struct tee_context *ctx,
|
||||
struct tee_shm *shm)
|
||||
{
|
||||
struct ffa_send_direct_data data = {
|
||||
.data0 = OPTEE_FFA_YIELDING_CALL_WITH_ARG,
|
||||
.data1 = (u32)shm->sec_world_id,
|
||||
.data2 = (u32)(shm->sec_world_id >> 32),
|
||||
.data3 = shm->offset,
|
||||
};
|
||||
struct optee_msg_arg *arg = tee_shm_get_va(shm, 0);
|
||||
unsigned int rpc_arg_offs = OPTEE_MSG_GET_ARG_SIZE(arg->num_params);
|
||||
struct optee_msg_arg *rpc_arg = tee_shm_get_va(shm, rpc_arg_offs);
|
||||
|
||||
return optee_ffa_yielding_call(ctx, &data, rpc_arg);
|
||||
}
|
||||
|
||||
/*
|
||||
* 6. Driver initialization
|
||||
*
|
||||
* During driver inititialization is the OP-TEE Secure Partition is probed
|
||||
* to find out which features it supports so the driver can be initialized
|
||||
* with a matching configuration.
|
||||
*/
|
||||
|
||||
static bool optee_ffa_api_is_compatbile(struct ffa_device *ffa_dev,
|
||||
const struct ffa_dev_ops *ops)
|
||||
{
|
||||
struct ffa_send_direct_data data = { OPTEE_FFA_GET_API_VERSION };
|
||||
int rc;
|
||||
|
||||
ops->mode_32bit_set(ffa_dev);
|
||||
|
||||
rc = ops->sync_send_receive(ffa_dev, &data);
|
||||
if (rc) {
|
||||
pr_err("Unexpected error %d\n", rc);
|
||||
return false;
|
||||
}
|
||||
if (data.data0 != OPTEE_FFA_VERSION_MAJOR ||
|
||||
data.data1 < OPTEE_FFA_VERSION_MINOR) {
|
||||
pr_err("Incompatible OP-TEE API version %lu.%lu",
|
||||
data.data0, data.data1);
|
||||
return false;
|
||||
}
|
||||
|
||||
data = (struct ffa_send_direct_data){ OPTEE_FFA_GET_OS_VERSION };
|
||||
rc = ops->sync_send_receive(ffa_dev, &data);
|
||||
if (rc) {
|
||||
pr_err("Unexpected error %d\n", rc);
|
||||
return false;
|
||||
}
|
||||
if (data.data2)
|
||||
pr_info("revision %lu.%lu (%08lx)",
|
||||
data.data0, data.data1, data.data2);
|
||||
else
|
||||
pr_info("revision %lu.%lu", data.data0, data.data1);
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
static bool optee_ffa_exchange_caps(struct ffa_device *ffa_dev,
|
||||
const struct ffa_dev_ops *ops,
|
||||
unsigned int *rpc_arg_count)
|
||||
{
|
||||
struct ffa_send_direct_data data = { OPTEE_FFA_EXCHANGE_CAPABILITIES };
|
||||
int rc;
|
||||
|
||||
rc = ops->sync_send_receive(ffa_dev, &data);
|
||||
if (rc) {
|
||||
pr_err("Unexpected error %d", rc);
|
||||
return false;
|
||||
}
|
||||
if (data.data0) {
|
||||
pr_err("Unexpected exchange error %lu", data.data0);
|
||||
return false;
|
||||
}
|
||||
|
||||
*rpc_arg_count = (u8)data.data1;
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
static struct tee_shm_pool *optee_ffa_config_dyn_shm(void)
|
||||
{
|
||||
struct tee_shm_pool_mgr *priv_mgr;
|
||||
struct tee_shm_pool_mgr *dmabuf_mgr;
|
||||
void *rc;
|
||||
|
||||
rc = optee_ffa_shm_pool_alloc_pages();
|
||||
if (IS_ERR(rc))
|
||||
return rc;
|
||||
priv_mgr = rc;
|
||||
|
||||
rc = optee_ffa_shm_pool_alloc_pages();
|
||||
if (IS_ERR(rc)) {
|
||||
tee_shm_pool_mgr_destroy(priv_mgr);
|
||||
return rc;
|
||||
}
|
||||
dmabuf_mgr = rc;
|
||||
|
||||
rc = tee_shm_pool_alloc(priv_mgr, dmabuf_mgr);
|
||||
if (IS_ERR(rc)) {
|
||||
tee_shm_pool_mgr_destroy(priv_mgr);
|
||||
tee_shm_pool_mgr_destroy(dmabuf_mgr);
|
||||
}
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
static void optee_ffa_get_version(struct tee_device *teedev,
|
||||
struct tee_ioctl_version_data *vers)
|
||||
{
|
||||
struct tee_ioctl_version_data v = {
|
||||
.impl_id = TEE_IMPL_ID_OPTEE,
|
||||
.impl_caps = TEE_OPTEE_CAP_TZ,
|
||||
.gen_caps = TEE_GEN_CAP_GP | TEE_GEN_CAP_REG_MEM |
|
||||
TEE_GEN_CAP_MEMREF_NULL,
|
||||
};
|
||||
|
||||
*vers = v;
|
||||
}
|
||||
|
||||
static int optee_ffa_open(struct tee_context *ctx)
|
||||
{
|
||||
return optee_open(ctx, true);
|
||||
}
|
||||
|
||||
static const struct tee_driver_ops optee_ffa_clnt_ops = {
|
||||
.get_version = optee_ffa_get_version,
|
||||
.open = optee_ffa_open,
|
||||
.release = optee_release,
|
||||
.open_session = optee_open_session,
|
||||
.close_session = optee_close_session,
|
||||
.invoke_func = optee_invoke_func,
|
||||
.cancel_req = optee_cancel_req,
|
||||
.shm_register = optee_ffa_shm_register,
|
||||
.shm_unregister = optee_ffa_shm_unregister,
|
||||
};
|
||||
|
||||
static const struct tee_desc optee_ffa_clnt_desc = {
|
||||
.name = DRIVER_NAME "-ffa-clnt",
|
||||
.ops = &optee_ffa_clnt_ops,
|
||||
.owner = THIS_MODULE,
|
||||
};
|
||||
|
||||
static const struct tee_driver_ops optee_ffa_supp_ops = {
|
||||
.get_version = optee_ffa_get_version,
|
||||
.open = optee_ffa_open,
|
||||
.release = optee_release_supp,
|
||||
.supp_recv = optee_supp_recv,
|
||||
.supp_send = optee_supp_send,
|
||||
.shm_register = optee_ffa_shm_register, /* same as for clnt ops */
|
||||
.shm_unregister = optee_ffa_shm_unregister_supp,
|
||||
};
|
||||
|
||||
static const struct tee_desc optee_ffa_supp_desc = {
|
||||
.name = DRIVER_NAME "-ffa-supp",
|
||||
.ops = &optee_ffa_supp_ops,
|
||||
.owner = THIS_MODULE,
|
||||
.flags = TEE_DESC_PRIVILEGED,
|
||||
};
|
||||
|
||||
static const struct optee_ops optee_ffa_ops = {
|
||||
.do_call_with_arg = optee_ffa_do_call_with_arg,
|
||||
.to_msg_param = optee_ffa_to_msg_param,
|
||||
.from_msg_param = optee_ffa_from_msg_param,
|
||||
};
|
||||
|
||||
static void optee_ffa_remove(struct ffa_device *ffa_dev)
|
||||
{
|
||||
struct optee *optee = ffa_dev->dev.driver_data;
|
||||
|
||||
optee_remove_common(optee);
|
||||
|
||||
mutex_destroy(&optee->ffa.mutex);
|
||||
rhashtable_free_and_destroy(&optee->ffa.global_ids, rh_free_fn, NULL);
|
||||
|
||||
kfree(optee);
|
||||
}
|
||||
|
||||
static int optee_ffa_probe(struct ffa_device *ffa_dev)
|
||||
{
|
||||
const struct ffa_dev_ops *ffa_ops;
|
||||
unsigned int rpc_arg_count;
|
||||
struct tee_device *teedev;
|
||||
struct optee *optee;
|
||||
int rc;
|
||||
|
||||
ffa_ops = ffa_dev_ops_get(ffa_dev);
|
||||
if (!ffa_ops) {
|
||||
pr_warn("failed \"method\" init: ffa\n");
|
||||
return -ENOENT;
|
||||
}
|
||||
|
||||
if (!optee_ffa_api_is_compatbile(ffa_dev, ffa_ops))
|
||||
return -EINVAL;
|
||||
|
||||
if (!optee_ffa_exchange_caps(ffa_dev, ffa_ops, &rpc_arg_count))
|
||||
return -EINVAL;
|
||||
|
||||
optee = kzalloc(sizeof(*optee), GFP_KERNEL);
|
||||
if (!optee) {
|
||||
rc = -ENOMEM;
|
||||
goto err;
|
||||
}
|
||||
optee->pool = optee_ffa_config_dyn_shm();
|
||||
if (IS_ERR(optee->pool)) {
|
||||
rc = PTR_ERR(optee->pool);
|
||||
optee->pool = NULL;
|
||||
goto err;
|
||||
}
|
||||
|
||||
optee->ops = &optee_ffa_ops;
|
||||
optee->ffa.ffa_dev = ffa_dev;
|
||||
optee->ffa.ffa_ops = ffa_ops;
|
||||
optee->rpc_arg_count = rpc_arg_count;
|
||||
|
||||
teedev = tee_device_alloc(&optee_ffa_clnt_desc, NULL, optee->pool,
|
||||
optee);
|
||||
if (IS_ERR(teedev)) {
|
||||
rc = PTR_ERR(teedev);
|
||||
goto err;
|
||||
}
|
||||
optee->teedev = teedev;
|
||||
|
||||
teedev = tee_device_alloc(&optee_ffa_supp_desc, NULL, optee->pool,
|
||||
optee);
|
||||
if (IS_ERR(teedev)) {
|
||||
rc = PTR_ERR(teedev);
|
||||
goto err;
|
||||
}
|
||||
optee->supp_teedev = teedev;
|
||||
|
||||
rc = tee_device_register(optee->teedev);
|
||||
if (rc)
|
||||
goto err;
|
||||
|
||||
rc = tee_device_register(optee->supp_teedev);
|
||||
if (rc)
|
||||
goto err;
|
||||
|
||||
rc = rhashtable_init(&optee->ffa.global_ids, &shm_rhash_params);
|
||||
if (rc)
|
||||
goto err;
|
||||
mutex_init(&optee->ffa.mutex);
|
||||
mutex_init(&optee->call_queue.mutex);
|
||||
INIT_LIST_HEAD(&optee->call_queue.waiters);
|
||||
optee_wait_queue_init(&optee->wait_queue);
|
||||
optee_supp_init(&optee->supp);
|
||||
ffa_dev_set_drvdata(ffa_dev, optee);
|
||||
|
||||
rc = optee_enumerate_devices(PTA_CMD_GET_DEVICES);
|
||||
if (rc) {
|
||||
optee_ffa_remove(ffa_dev);
|
||||
return rc;
|
||||
}
|
||||
|
||||
pr_info("initialized driver\n");
|
||||
return 0;
|
||||
err:
|
||||
/*
|
||||
* tee_device_unregister() is safe to call even if the
|
||||
* devices hasn't been registered with
|
||||
* tee_device_register() yet.
|
||||
*/
|
||||
tee_device_unregister(optee->supp_teedev);
|
||||
tee_device_unregister(optee->teedev);
|
||||
if (optee->pool)
|
||||
tee_shm_pool_free(optee->pool);
|
||||
kfree(optee);
|
||||
return rc;
|
||||
}
|
||||
|
||||
static const struct ffa_device_id optee_ffa_device_id[] = {
|
||||
/* 486178e0-e7f8-11e3-bc5e0002a5d5c51b */
|
||||
{ UUID_INIT(0x486178e0, 0xe7f8, 0x11e3,
|
||||
0xbc, 0x5e, 0x00, 0x02, 0xa5, 0xd5, 0xc5, 0x1b) },
|
||||
{}
|
||||
};
|
||||
|
||||
static struct ffa_driver optee_ffa_driver = {
|
||||
.name = "optee",
|
||||
.probe = optee_ffa_probe,
|
||||
.remove = optee_ffa_remove,
|
||||
.id_table = optee_ffa_device_id,
|
||||
};
|
||||
|
||||
int optee_ffa_abi_register(void)
|
||||
{
|
||||
if (IS_REACHABLE(CONFIG_ARM_FFA_TRANSPORT))
|
||||
return ffa_register(&optee_ffa_driver);
|
||||
else
|
||||
return -EOPNOTSUPP;
|
||||
}
|
||||
|
||||
void optee_ffa_abi_unregister(void)
|
||||
{
|
||||
if (IS_REACHABLE(CONFIG_ARM_FFA_TRANSPORT))
|
||||
ffa_unregister(&optee_ffa_driver);
|
||||
}
|
||||
153
drivers/tee/optee/optee_ffa.h
Normal file
153
drivers/tee/optee/optee_ffa.h
Normal file
@ -0,0 +1,153 @@
|
||||
/* SPDX-License-Identifier: BSD-2-Clause */
|
||||
/*
|
||||
* Copyright (c) 2019-2021, Linaro Limited
|
||||
*/
|
||||
|
||||
/*
|
||||
* This file is exported by OP-TEE and is kept in sync between secure world
|
||||
* and normal world drivers. We're using ARM FF-A 1.0 specification.
|
||||
*/
|
||||
|
||||
#ifndef __OPTEE_FFA_H
|
||||
#define __OPTEE_FFA_H
|
||||
|
||||
#include <linux/arm_ffa.h>
|
||||
|
||||
/*
|
||||
* Normal world sends requests with FFA_MSG_SEND_DIRECT_REQ and
|
||||
* responses are returned with FFA_MSG_SEND_DIRECT_RESP for normal
|
||||
* messages.
|
||||
*
|
||||
* All requests with FFA_MSG_SEND_DIRECT_REQ and FFA_MSG_SEND_DIRECT_RESP
|
||||
* are using the AArch32 SMC calling convention with register usage as
|
||||
* defined in FF-A specification:
|
||||
* w0: Function ID (0x8400006F or 0x84000070)
|
||||
* w1: Source/Destination IDs
|
||||
* w2: Reserved (MBZ)
|
||||
* w3-w7: Implementation defined, free to be used below
|
||||
*/
|
||||
|
||||
#define OPTEE_FFA_VERSION_MAJOR 1
|
||||
#define OPTEE_FFA_VERSION_MINOR 0
|
||||
|
||||
#define OPTEE_FFA_BLOCKING_CALL(id) (id)
|
||||
#define OPTEE_FFA_YIELDING_CALL_BIT 31
|
||||
#define OPTEE_FFA_YIELDING_CALL(id) ((id) | BIT(OPTEE_FFA_YIELDING_CALL_BIT))
|
||||
|
||||
/*
|
||||
* Returns the API version implemented, currently follows the FF-A version.
|
||||
* Call register usage:
|
||||
* w3: Service ID, OPTEE_FFA_GET_API_VERSION
|
||||
* w4-w7: Not used (MBZ)
|
||||
*
|
||||
* Return register usage:
|
||||
* w3: OPTEE_FFA_VERSION_MAJOR
|
||||
* w4: OPTEE_FFA_VERSION_MINOR
|
||||
* w5-w7: Not used (MBZ)
|
||||
*/
|
||||
#define OPTEE_FFA_GET_API_VERSION OPTEE_FFA_BLOCKING_CALL(0)
|
||||
|
||||
/*
|
||||
* Returns the revision of OP-TEE.
|
||||
*
|
||||
* Used by non-secure world to figure out which version of the Trusted OS
|
||||
* is installed. Note that the returned revision is the revision of the
|
||||
* Trusted OS, not of the API.
|
||||
*
|
||||
* Call register usage:
|
||||
* w3: Service ID, OPTEE_FFA_GET_OS_VERSION
|
||||
* w4-w7: Unused (MBZ)
|
||||
*
|
||||
* Return register usage:
|
||||
* w3: CFG_OPTEE_REVISION_MAJOR
|
||||
* w4: CFG_OPTEE_REVISION_MINOR
|
||||
* w5: TEE_IMPL_GIT_SHA1 (or zero if not supported)
|
||||
*/
|
||||
#define OPTEE_FFA_GET_OS_VERSION OPTEE_FFA_BLOCKING_CALL(1)
|
||||
|
||||
/*
|
||||
* Exchange capabilities between normal world and secure world.
|
||||
*
|
||||
* Currently there are no defined capabilities. When features are added new
|
||||
* capabilities may be added.
|
||||
*
|
||||
* Call register usage:
|
||||
* w3: Service ID, OPTEE_FFA_EXCHANGE_CAPABILITIES
|
||||
* w4-w7: Note used (MBZ)
|
||||
*
|
||||
* Return register usage:
|
||||
* w3: Error code, 0 on success
|
||||
* w4: Bit[7:0]: Number of parameters needed for RPC to be supplied
|
||||
* as the second MSG arg struct for
|
||||
* OPTEE_FFA_YIELDING_CALL_WITH_ARG.
|
||||
* Bit[31:8]: Reserved (MBZ)
|
||||
* w5-w7: Note used (MBZ)
|
||||
*/
|
||||
#define OPTEE_FFA_EXCHANGE_CAPABILITIES OPTEE_FFA_BLOCKING_CALL(2)
|
||||
|
||||
/*
|
||||
* Unregister shared memory
|
||||
*
|
||||
* Call register usage:
|
||||
* w3: Service ID, OPTEE_FFA_YIELDING_CALL_UNREGISTER_SHM
|
||||
* w4: Shared memory handle, lower bits
|
||||
* w5: Shared memory handle, higher bits
|
||||
* w6-w7: Not used (MBZ)
|
||||
*
|
||||
* Return register usage:
|
||||
* w3: Error code, 0 on success
|
||||
* w4-w7: Note used (MBZ)
|
||||
*/
|
||||
#define OPTEE_FFA_UNREGISTER_SHM OPTEE_FFA_BLOCKING_CALL(3)
|
||||
|
||||
/*
|
||||
* Call with struct optee_msg_arg as argument in the supplied shared memory
|
||||
* with a zero internal offset and normal cached memory attributes.
|
||||
* Register usage:
|
||||
* w3: Service ID, OPTEE_FFA_YIELDING_CALL_WITH_ARG
|
||||
* w4: Lower 32 bits of a 64-bit Shared memory handle
|
||||
* w5: Upper 32 bits of a 64-bit Shared memory handle
|
||||
* w6: Offset into shared memory pointing to a struct optee_msg_arg
|
||||
* right after the parameters of this struct (at offset
|
||||
* OPTEE_MSG_GET_ARG_SIZE(num_params) follows a struct optee_msg_arg
|
||||
* for RPC, this struct has reserved space for the number of RPC
|
||||
* parameters as returned by OPTEE_FFA_EXCHANGE_CAPABILITIES.
|
||||
* w7: Not used (MBZ)
|
||||
* Resume from RPC. Register usage:
|
||||
* w3: Service ID, OPTEE_FFA_YIELDING_CALL_RESUME
|
||||
* w4-w6: Not used (MBZ)
|
||||
* w7: Resume info
|
||||
*
|
||||
* Normal return (yielding call is completed). Register usage:
|
||||
* w3: Error code, 0 on success
|
||||
* w4: OPTEE_FFA_YIELDING_CALL_RETURN_DONE
|
||||
* w5-w7: Not used (MBZ)
|
||||
*
|
||||
* RPC interrupt return (RPC from secure world). Register usage:
|
||||
* w3: Error code == 0
|
||||
* w4: Any defined RPC code but OPTEE_FFA_YIELDING_CALL_RETURN_DONE
|
||||
* w5-w6: Not used (MBZ)
|
||||
* w7: Resume info
|
||||
*
|
||||
* Possible error codes in register w3:
|
||||
* 0: Success
|
||||
* FFA_DENIED: w4 isn't one of OPTEE_FFA_YIELDING_CALL_START
|
||||
* OPTEE_FFA_YIELDING_CALL_RESUME
|
||||
*
|
||||
* Possible error codes for OPTEE_FFA_YIELDING_CALL_START,
|
||||
* FFA_BUSY: Number of OP-TEE OS threads exceeded,
|
||||
* try again later
|
||||
* FFA_DENIED: RPC shared memory object not found
|
||||
* FFA_INVALID_PARAMETER: Bad shared memory handle or offset into the memory
|
||||
*
|
||||
* Possible error codes for OPTEE_FFA_YIELDING_CALL_RESUME
|
||||
* FFA_INVALID_PARAMETER: Bad resume info
|
||||
*/
|
||||
#define OPTEE_FFA_YIELDING_CALL_WITH_ARG OPTEE_FFA_YIELDING_CALL(0)
|
||||
#define OPTEE_FFA_YIELDING_CALL_RESUME OPTEE_FFA_YIELDING_CALL(1)
|
||||
|
||||
#define OPTEE_FFA_YIELDING_CALL_RETURN_DONE 0
|
||||
#define OPTEE_FFA_YIELDING_CALL_RETURN_RPC_CMD 1
|
||||
#define OPTEE_FFA_YIELDING_CALL_RETURN_INTERRUPT 2
|
||||
|
||||
#endif /*__OPTEE_FFA_H*/
|
||||
@ -28,6 +28,9 @@
|
||||
#define OPTEE_MSG_ATTR_TYPE_RMEM_INPUT 0x5
|
||||
#define OPTEE_MSG_ATTR_TYPE_RMEM_OUTPUT 0x6
|
||||
#define OPTEE_MSG_ATTR_TYPE_RMEM_INOUT 0x7
|
||||
#define OPTEE_MSG_ATTR_TYPE_FMEM_INPUT OPTEE_MSG_ATTR_TYPE_RMEM_INPUT
|
||||
#define OPTEE_MSG_ATTR_TYPE_FMEM_OUTPUT OPTEE_MSG_ATTR_TYPE_RMEM_OUTPUT
|
||||
#define OPTEE_MSG_ATTR_TYPE_FMEM_INOUT OPTEE_MSG_ATTR_TYPE_RMEM_INOUT
|
||||
#define OPTEE_MSG_ATTR_TYPE_TMEM_INPUT 0x9
|
||||
#define OPTEE_MSG_ATTR_TYPE_TMEM_OUTPUT 0xa
|
||||
#define OPTEE_MSG_ATTR_TYPE_TMEM_INOUT 0xb
|
||||
@ -96,6 +99,8 @@
|
||||
*/
|
||||
#define OPTEE_MSG_NONCONTIG_PAGE_SIZE 4096
|
||||
|
||||
#define OPTEE_MSG_FMEM_INVALID_GLOBAL_ID 0xffffffffffffffff
|
||||
|
||||
/**
|
||||
* struct optee_msg_param_tmem - temporary memory reference parameter
|
||||
* @buf_ptr: Address of the buffer
|
||||
@ -127,6 +132,23 @@ struct optee_msg_param_rmem {
|
||||
u64 shm_ref;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct optee_msg_param_fmem - ffa memory reference parameter
|
||||
* @offs_lower: Lower bits of offset into shared memory reference
|
||||
* @offs_upper: Upper bits of offset into shared memory reference
|
||||
* @internal_offs: Internal offset into the first page of shared memory
|
||||
* reference
|
||||
* @size: Size of the buffer
|
||||
* @global_id: Global identifier of Shared memory
|
||||
*/
|
||||
struct optee_msg_param_fmem {
|
||||
u32 offs_low;
|
||||
u16 offs_high;
|
||||
u16 internal_offs;
|
||||
u64 size;
|
||||
u64 global_id;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct optee_msg_param_value - opaque value parameter
|
||||
*
|
||||
@ -143,13 +165,15 @@ struct optee_msg_param_value {
|
||||
* @attr: attributes
|
||||
* @tmem: parameter by temporary memory reference
|
||||
* @rmem: parameter by registered memory reference
|
||||
* @fmem: parameter by ffa registered memory reference
|
||||
* @value: parameter by opaque value
|
||||
* @octets: parameter by octet string
|
||||
*
|
||||
* @attr & OPTEE_MSG_ATTR_TYPE_MASK indicates if tmem, rmem or value is used in
|
||||
* the union. OPTEE_MSG_ATTR_TYPE_VALUE_* indicates value or octets,
|
||||
* OPTEE_MSG_ATTR_TYPE_TMEM_* indicates @tmem and
|
||||
* OPTEE_MSG_ATTR_TYPE_RMEM_* indicates @rmem,
|
||||
* OPTEE_MSG_ATTR_TYPE_RMEM_* or the alias PTEE_MSG_ATTR_TYPE_FMEM_* indicates
|
||||
* @rmem or @fmem depending on the conduit.
|
||||
* OPTEE_MSG_ATTR_TYPE_NONE indicates that none of the members are used.
|
||||
*/
|
||||
struct optee_msg_param {
|
||||
@ -157,6 +181,7 @@ struct optee_msg_param {
|
||||
union {
|
||||
struct optee_msg_param_tmem tmem;
|
||||
struct optee_msg_param_rmem rmem;
|
||||
struct optee_msg_param_fmem fmem;
|
||||
struct optee_msg_param_value value;
|
||||
u8 octets[24];
|
||||
} u;
|
||||
|
||||
@ -7,6 +7,7 @@
|
||||
#define OPTEE_PRIVATE_H
|
||||
|
||||
#include <linux/arm-smccc.h>
|
||||
#include <linux/rhashtable.h>
|
||||
#include <linux/semaphore.h>
|
||||
#include <linux/tee_drv.h>
|
||||
#include <linux/types.h>
|
||||
@ -22,6 +23,7 @@
|
||||
#define TEEC_ERROR_NOT_SUPPORTED 0xFFFF000A
|
||||
#define TEEC_ERROR_COMMUNICATION 0xFFFF000E
|
||||
#define TEEC_ERROR_OUT_OF_MEMORY 0xFFFF000C
|
||||
#define TEEC_ERROR_BUSY 0xFFFF000D
|
||||
#define TEEC_ERROR_SHORT_BUFFER 0xFFFF0010
|
||||
|
||||
#define TEEC_ORIGIN_COMMS 0x00000002
|
||||
@ -73,19 +75,28 @@ struct optee_supp {
|
||||
struct completion reqs_c;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct optee_smc - SMC ABI specifics
|
||||
* @invoke_fn: function to issue smc or hvc
|
||||
* @memremaped_shm virtual address of memory in shared memory pool
|
||||
* @sec_caps: secure world capabilities defined by
|
||||
* OPTEE_SMC_SEC_CAP_* in optee_smc.h
|
||||
*/
|
||||
struct optee_smc {
|
||||
optee_invoke_fn *invoke_fn;
|
||||
void *memremaped_shm;
|
||||
u32 sec_caps;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct optee_ffa_data - FFA communication struct
|
||||
* @ffa_dev FFA device, contains the destination id, the id of
|
||||
* OP-TEE in secure world
|
||||
* @ffa_ops FFA operations
|
||||
* @mutex Serializes access to @global_ids
|
||||
* @global_ids FF-A shared memory global handle translation
|
||||
*/
|
||||
struct optee_ffa {
|
||||
struct ffa_device *ffa_dev;
|
||||
const struct ffa_dev_ops *ffa_ops;
|
||||
/* Serializes access to @global_ids */
|
||||
struct mutex mutex;
|
||||
struct rhashtable global_ids;
|
||||
};
|
||||
|
||||
struct optee;
|
||||
|
||||
/**
|
||||
@ -116,11 +127,13 @@ struct optee_ops {
|
||||
* world
|
||||
* @teedev: client device
|
||||
* @smc: specific to SMC ABI
|
||||
* @ffa: specific to FF-A ABI
|
||||
* @call_queue: queue of threads waiting to call @invoke_fn
|
||||
* @wait_queue: queue of threads from secure world waiting for a
|
||||
* secure world sync object
|
||||
* @supp: supplicant synchronization struct for RPC to supplicant
|
||||
* @pool: shared memory pool
|
||||
* @rpc_arg_count: If > 0 number of RPC parameters to make room for
|
||||
* @scan_bus_done flag if device registation was already done.
|
||||
* @scan_bus_wq workqueue to scan optee bus and register optee drivers
|
||||
* @scan_bus_work workq to scan optee bus and register optee drivers
|
||||
@ -129,11 +142,15 @@ struct optee {
|
||||
struct tee_device *supp_teedev;
|
||||
struct tee_device *teedev;
|
||||
const struct optee_ops *ops;
|
||||
struct optee_smc smc;
|
||||
union {
|
||||
struct optee_smc smc;
|
||||
struct optee_ffa ffa;
|
||||
};
|
||||
struct optee_call_queue call_queue;
|
||||
struct optee_wait_queue wait_queue;
|
||||
struct optee_supp supp;
|
||||
struct tee_shm_pool *pool;
|
||||
unsigned int rpc_arg_count;
|
||||
bool scan_bus_done;
|
||||
struct workqueue_struct *scan_bus_wq;
|
||||
struct work_struct scan_bus_work;
|
||||
@ -266,5 +283,7 @@ static inline void reg_pair_from_64(u32 *reg0, u32 *reg1, u64 val)
|
||||
/* Registration of the ABIs */
|
||||
int optee_smc_abi_register(void);
|
||||
void optee_smc_abi_unregister(void);
|
||||
int optee_ffa_abi_register(void);
|
||||
void optee_ffa_abi_unregister(void);
|
||||
|
||||
#endif /*OPTEE_PRIVATE_H*/
|
||||
|
||||
Loading…
Reference in New Issue
Block a user