[U-Boot] [PATCH v2 07/15] tee: add OP-TEE driver
Jens Wiklander
jens.wiklander at linaro.org
Thu Aug 23 10:43:26 UTC 2018
Adds a OP-TEE driver.
* Targets ARM and ARM64
* Supports using any u-boot memory as shared memory
* Probes OP-TEE version using SMCs
* Uses OPTEE message protocol version 2 to communicate with secure world
Tested-by: Igor Opaniuk <igor.opaniuk at linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander at linaro.org>
---
drivers/tee/Kconfig | 10 +
drivers/tee/Makefile | 1 +
drivers/tee/optee/Kconfig | 7 +
drivers/tee/optee/Makefile | 4 +
drivers/tee/optee/core.c | 614 +++++++++++++++++++++++
drivers/tee/optee/optee_msg.h | 423 ++++++++++++++++
drivers/tee/optee/optee_msg_supplicant.h | 234 +++++++++
drivers/tee/optee/optee_private.h | 12 +
drivers/tee/optee/optee_smc.h | 444 ++++++++++++++++
drivers/tee/optee/supplicant.c | 89 ++++
10 files changed, 1838 insertions(+)
create mode 100644 drivers/tee/optee/Kconfig
create mode 100644 drivers/tee/optee/Makefile
create mode 100644 drivers/tee/optee/core.c
create mode 100644 drivers/tee/optee/optee_msg.h
create mode 100644 drivers/tee/optee/optee_msg_supplicant.h
create mode 100644 drivers/tee/optee/optee_private.h
create mode 100644 drivers/tee/optee/optee_smc.h
create mode 100644 drivers/tee/optee/supplicant.c
diff --git a/drivers/tee/Kconfig b/drivers/tee/Kconfig
index 817ab331b0f8..3e7fe6ddcc5d 100644
--- a/drivers/tee/Kconfig
+++ b/drivers/tee/Kconfig
@@ -6,3 +6,13 @@ config TEE
help
This implements a generic interface towards a Trusted Execution
Environment (TEE).
+
+if TEE
+
+menu "TEE drivers"
+
+source "drivers/tee/optee/Kconfig"
+
+endmenu
+
+endif
diff --git a/drivers/tee/Makefile b/drivers/tee/Makefile
index b6d8e16e6211..19633b60f235 100644
--- a/drivers/tee/Makefile
+++ b/drivers/tee/Makefile
@@ -1,3 +1,4 @@
# SPDX-License-Identifier: GPL-2.0+
obj-y += tee-uclass.o
+obj-$(CONFIG_OPTEE) += optee/
diff --git a/drivers/tee/optee/Kconfig b/drivers/tee/optee/Kconfig
new file mode 100644
index 000000000000..8f7ebe161111
--- /dev/null
+++ b/drivers/tee/optee/Kconfig
@@ -0,0 +1,7 @@
+# OP-TEE Trusted Execution Environment Configuration
+config OPTEE
+ bool "OP-TEE"
+ depends on ARM_SMCCC
+ help
+ This implements the OP-TEE Trusted Execution Environment (TEE)
+ driver.
diff --git a/drivers/tee/optee/Makefile b/drivers/tee/optee/Makefile
new file mode 100644
index 000000000000..6148feb474a5
--- /dev/null
+++ b/drivers/tee/optee/Makefile
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0+
+
+obj-y += core.o
+obj-y += supplicant.o
diff --git a/drivers/tee/optee/core.c b/drivers/tee/optee/core.c
new file mode 100644
index 000000000000..f2d92d96551b
--- /dev/null
+++ b/drivers/tee/optee/core.c
@@ -0,0 +1,614 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2018 Linaro Limited
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <linux/arm-smccc.h>
+#include <linux/io.h>
+#include <log.h>
+#include <tee.h>
+
+#include "optee_smc.h"
+#include "optee_msg.h"
+#include "optee_private.h"
+
+#define PAGELIST_ENTRIES_PER_PAGE \
+ ((OPTEE_MSG_NONCONTIG_PAGE_SIZE / sizeof(u64)) - 1)
+
+typedef void (optee_invoke_fn)(unsigned long, unsigned long, unsigned long,
+ unsigned long, unsigned long, unsigned long,
+ unsigned long, unsigned long,
+ struct arm_smccc_res *);
+
+struct optee_pdata {
+ optee_invoke_fn *invoke_fn;
+};
+
+struct rpc_param {
+ u32 a0;
+ u32 a1;
+ u32 a2;
+ u32 a3;
+ u32 a4;
+ u32 a5;
+ u32 a6;
+ u32 a7;
+};
+
+static void *reg_pair_to_ptr(u32 reg0, u32 reg1)
+{
+ return (void *)(ulong)(((u64)reg0 << 32) | reg1);
+}
+
+static void reg_pair_from_64(u32 *reg0, u32 *reg1, u64 val)
+{
+ *reg0 = val >> 32;
+ *reg1 = val;
+}
+
+void *optee_alloc_and_init_page_list(void *buf, ulong len, u64 *phys_buf_ptr)
+{
+ const unsigned int page_size = OPTEE_MSG_NONCONTIG_PAGE_SIZE;
+ const phys_addr_t page_mask = page_size - 1;
+ u8 *buf_base;
+ unsigned int page_offset;
+ unsigned int num_pages;
+ unsigned int list_size;
+ unsigned int n;
+ void *page_list;
+ struct {
+ u64 pages_list[PAGELIST_ENTRIES_PER_PAGE];
+ u64 next_page_data;
+ } *pages_data;
+
+ page_offset = (ulong)buf & page_mask;
+ num_pages = roundup(page_offset + len, page_size) / page_size;
+ list_size = DIV_ROUND_UP(num_pages, PAGELIST_ENTRIES_PER_PAGE) *
+ page_size;
+ page_list = memalign(page_size, list_size);
+ if (!page_list)
+ return NULL;
+
+ pages_data = page_list;
+ buf_base = (u8 *)(rounddown((ulong)buf, page_size));
+ n = 0;
+ while (num_pages) {
+ pages_data->pages_list[n] = virt_to_phys(buf_base);
+ n++;
+ buf_base += page_size;
+ num_pages--;
+
+ if (n == PAGELIST_ENTRIES_PER_PAGE) {
+ pages_data->next_page_data =
+ virt_to_phys(pages_data + 1);
+ pages_data++;
+ n = 0;
+ }
+ }
+
+ *phys_buf_ptr = virt_to_phys(page_list) | page_offset;
+ return page_list;
+}
+
+static void optee_get_version(struct udevice *dev,
+ struct tee_version_data *vers)
+{
+ struct tee_version_data v = {
+ .gen_caps = TEE_GEN_CAP_GP | TEE_GEN_CAP_REG_MEM,
+ };
+
+ *vers = v;
+}
+
+static struct tee_shm *get_msg_arg(struct udevice *dev, ulong num_params,
+ struct optee_msg_arg **msg_arg)
+{
+ struct tee_shm *shm;
+ struct optee_msg_arg *ma;
+
+ shm = __tee_shm_add(dev, OPTEE_MSG_NONCONTIG_PAGE_SIZE, NULL,
+ OPTEE_MSG_GET_ARG_SIZE(num_params), TEE_SHM_ALLOC);
+ if (!shm)
+ return NULL;
+
+ ma = shm->addr;
+ memset(ma, 0, OPTEE_MSG_GET_ARG_SIZE(num_params));
+ ma->num_params = num_params;
+ *msg_arg = ma;
+
+ return shm;
+}
+
+static int to_msg_param(struct optee_msg_param *msg_params, ulong num_params,
+ const struct tee_param *params)
+{
+ ulong n;
+
+ for (n = 0; n < num_params; n++) {
+ const struct tee_param *p = params + n;
+ struct optee_msg_param *mp = msg_params + n;
+
+ switch (p->attr) {
+ case TEE_PARAM_ATTR_TYPE_NONE:
+ mp->attr = OPTEE_MSG_ATTR_TYPE_NONE;
+ memset(&mp->u, 0, sizeof(mp->u));
+ break;
+ case TEE_PARAM_ATTR_TYPE_VALUE_INPUT:
+ case TEE_PARAM_ATTR_TYPE_VALUE_OUTPUT:
+ case TEE_PARAM_ATTR_TYPE_VALUE_INOUT:
+ mp->attr = OPTEE_MSG_ATTR_TYPE_VALUE_INPUT + p->attr -
+ TEE_PARAM_ATTR_TYPE_VALUE_INPUT;
+ mp->u.value.a = p->u.value.a;
+ mp->u.value.b = p->u.value.b;
+ mp->u.value.c = p->u.value.c;
+ break;
+ case TEE_PARAM_ATTR_TYPE_MEMREF_INPUT:
+ case TEE_PARAM_ATTR_TYPE_MEMREF_OUTPUT:
+ case TEE_PARAM_ATTR_TYPE_MEMREF_INOUT:
+ mp->attr = OPTEE_MSG_ATTR_TYPE_RMEM_INPUT + p->attr -
+ TEE_PARAM_ATTR_TYPE_MEMREF_INPUT;
+ mp->u.rmem.shm_ref = (ulong)p->u.memref.shm;
+ mp->u.rmem.size = p->u.memref.size;
+ mp->u.rmem.offs = p->u.memref.shm_offs;
+ break;
+ default:
+ return -EINVAL;
+ }
+ }
+ return 0;
+}
+
+static int from_msg_param(struct tee_param *params, ulong num_params,
+ const struct optee_msg_param *msg_params)
+{
+ ulong n;
+ struct tee_shm *shm;
+
+ for (n = 0; n < num_params; n++) {
+ struct tee_param *p = params + n;
+ const struct optee_msg_param *mp = msg_params + n;
+ u32 attr = mp->attr & OPTEE_MSG_ATTR_TYPE_MASK;
+
+ switch (attr) {
+ case OPTEE_MSG_ATTR_TYPE_NONE:
+ p->attr = TEE_PARAM_ATTR_TYPE_NONE;
+ memset(&p->u, 0, sizeof(p->u));
+ break;
+ case OPTEE_MSG_ATTR_TYPE_VALUE_INPUT:
+ case OPTEE_MSG_ATTR_TYPE_VALUE_OUTPUT:
+ case OPTEE_MSG_ATTR_TYPE_VALUE_INOUT:
+ p->attr = TEE_PARAM_ATTR_TYPE_VALUE_INPUT + attr -
+ OPTEE_MSG_ATTR_TYPE_VALUE_INPUT;
+ p->u.value.a = mp->u.value.a;
+ p->u.value.b = mp->u.value.b;
+ p->u.value.c = mp->u.value.c;
+ break;
+ case OPTEE_MSG_ATTR_TYPE_RMEM_INPUT:
+ case OPTEE_MSG_ATTR_TYPE_RMEM_OUTPUT:
+ case OPTEE_MSG_ATTR_TYPE_RMEM_INOUT:
+ p->attr = TEE_PARAM_ATTR_TYPE_MEMREF_INPUT + attr -
+ OPTEE_MSG_ATTR_TYPE_RMEM_INPUT;
+ p->u.memref.size = mp->u.rmem.size;
+ shm = (struct tee_shm *)(ulong)mp->u.rmem.shm_ref;
+
+ if (!shm) {
+ p->u.memref.shm_offs = 0;
+ p->u.memref.shm = NULL;
+ break;
+ }
+ p->u.memref.shm_offs = mp->u.rmem.offs;
+ p->u.memref.shm = shm;
+ break;
+ default:
+ return -EINVAL;
+ }
+ }
+ return 0;
+}
+
+static void handle_rpc(struct udevice *dev, struct rpc_param *param,
+ void *page_list)
+{
+ struct tee_shm *shm;
+
+ switch (OPTEE_SMC_RETURN_GET_RPC_FUNC(param->a0)) {
+ case OPTEE_SMC_RPC_FUNC_ALLOC:
+ shm = __tee_shm_add(dev, OPTEE_MSG_NONCONTIG_PAGE_SIZE, NULL,
+ param->a1,
+ TEE_SHM_ALLOC | TEE_SHM_REGISTER);
+ if (shm) {
+ reg_pair_from_64(¶m->a1, ¶m->a2,
+ virt_to_phys(shm->addr));
+ /* "cookie" */
+ reg_pair_from_64(¶m->a4, ¶m->a5, (ulong)shm);
+ } else {
+ param->a1 = 0;
+ param->a2 = 0;
+ param->a4 = 0;
+ param->a5 = 0;
+ }
+ break;
+ case OPTEE_SMC_RPC_FUNC_FREE:
+ shm = reg_pair_to_ptr(param->a1, param->a2);
+ tee_shm_free(shm);
+ break;
+ case OPTEE_SMC_RPC_FUNC_FOREIGN_INTR:
+ break;
+ case OPTEE_SMC_RPC_FUNC_CMD:
+ shm = reg_pair_to_ptr(param->a1, param->a2);
+ optee_suppl_cmd(dev, shm, page_list);
+ break;
+ default:
+ break;
+ }
+
+ param->a0 = OPTEE_SMC_CALL_RETURN_FROM_RPC;
+}
+
+static u32 call_err_to_res(u32 call_err)
+{
+ switch (call_err) {
+ case OPTEE_SMC_RETURN_OK:
+ return TEE_SUCCESS;
+ default:
+ return TEE_ERROR_BAD_PARAMETERS;
+ }
+}
+
+static u32 do_call_with_arg(struct udevice *dev, struct optee_msg_arg *arg)
+{
+ struct optee_pdata *pdata = dev_get_platdata(dev);
+ struct rpc_param param = { .a0 = OPTEE_SMC_CALL_WITH_ARG };
+ void *page_list = NULL;
+
+ reg_pair_from_64(¶m.a1, ¶m.a2, virt_to_phys(arg));
+ while (true) {
+ struct arm_smccc_res res;
+
+ pdata->invoke_fn(param.a0, param.a1, param.a2, param.a3,
+ param.a4, param.a5, param.a6, param.a7, &res);
+
+ free(page_list);
+ page_list = NULL;
+
+ if (OPTEE_SMC_RETURN_IS_RPC(res.a0)) {
+ param.a0 = res.a0;
+ param.a1 = res.a1;
+ param.a2 = res.a2;
+ param.a3 = res.a3;
+ handle_rpc(dev, ¶m, &page_list);
+ } else {
+ return call_err_to_res(res.a0);
+ }
+ }
+}
+
+static int optee_close_session(struct udevice *dev, u32 session)
+{
+ struct tee_shm *shm;
+ struct optee_msg_arg *msg_arg;
+
+ shm = get_msg_arg(dev, 0, &msg_arg);
+ if (!shm)
+ return -ENOMEM;
+
+ msg_arg->cmd = OPTEE_MSG_CMD_CLOSE_SESSION;
+ msg_arg->session = session;
+ do_call_with_arg(dev, msg_arg);
+
+ tee_shm_free(shm);
+ return 0;
+}
+
+static int optee_open_session(struct udevice *dev,
+ struct tee_open_session_arg *arg,
+ ulong num_params, struct tee_param *params)
+{
+ int rc;
+ struct tee_shm *shm;
+ struct optee_msg_arg *msg_arg;
+
+ shm = get_msg_arg(dev, num_params + 2, &msg_arg);
+ if (!shm)
+ return -ENOMEM;
+
+ msg_arg->cmd = OPTEE_MSG_CMD_OPEN_SESSION;
+ /*
+ * Initialize and add the meta parameters needed when opening a
+ * session.
+ */
+ msg_arg->params[0].attr = OPTEE_MSG_ATTR_TYPE_VALUE_INPUT |
+ OPTEE_MSG_ATTR_META;
+ msg_arg->params[1].attr = OPTEE_MSG_ATTR_TYPE_VALUE_INPUT |
+ OPTEE_MSG_ATTR_META;
+ memcpy(&msg_arg->params[0].u.value, arg->uuid, sizeof(arg->uuid));
+ memcpy(&msg_arg->params[1].u.value, arg->uuid, sizeof(arg->clnt_uuid));
+ msg_arg->params[1].u.value.c = arg->clnt_login;
+
+ rc = to_msg_param(msg_arg->params + 2, num_params, params);
+ if (rc)
+ goto out;
+
+ arg->ret = do_call_with_arg(dev, msg_arg);
+ if (arg->ret) {
+ arg->ret_origin = TEE_ORIGIN_COMMS;
+ goto out;
+ }
+
+ if (from_msg_param(params, num_params, msg_arg->params + 2)) {
+ arg->ret = TEE_ERROR_COMMUNICATION;
+ arg->ret_origin = TEE_ORIGIN_COMMS;
+ /* Close session again to avoid leakage */
+ optee_close_session(dev, msg_arg->session);
+ goto out;
+ }
+
+ arg->session = msg_arg->session;
+ arg->ret = msg_arg->ret;
+ arg->ret_origin = msg_arg->ret_origin;
+out:
+ tee_shm_free(shm);
+
+ return rc;
+}
+
+static int optee_invoke_func(struct udevice *dev, struct tee_invoke_arg *arg,
+ ulong num_params, struct tee_param *params)
+{
+ struct tee_shm *shm;
+ struct optee_msg_arg *msg_arg;
+ int rc;
+
+ shm = get_msg_arg(dev, num_params, &msg_arg);
+ if (!shm)
+ return -ENOMEM;
+ msg_arg->cmd = OPTEE_MSG_CMD_INVOKE_COMMAND;
+ msg_arg->func = arg->func;
+ msg_arg->session = arg->session;
+
+ rc = to_msg_param(msg_arg->params, num_params, params);
+ if (rc)
+ goto out;
+
+ arg->ret = do_call_with_arg(dev, msg_arg);
+ if (arg->ret) {
+ arg->ret_origin = TEE_ORIGIN_COMMS;
+ goto out;
+ }
+
+ if (from_msg_param(params, num_params, msg_arg->params)) {
+ arg->ret = TEE_ERROR_COMMUNICATION;
+ arg->ret_origin = TEE_ORIGIN_COMMS;
+ goto out;
+ }
+
+ arg->ret = msg_arg->ret;
+ arg->ret_origin = msg_arg->ret_origin;
+out:
+ tee_shm_free(shm);
+ return rc;
+}
+
+static int optee_shm_register(struct udevice *dev, struct tee_shm *shm)
+{
+ struct tee_shm *shm_arg;
+ struct optee_msg_arg *msg_arg;
+ void *pl;
+ u64 ph_ptr;
+ int rc = 0;
+
+ shm_arg = get_msg_arg(dev, 1, &msg_arg);
+ if (!shm_arg)
+ return -ENOMEM;
+
+ pl = optee_alloc_and_init_page_list(shm->addr, shm->size, &ph_ptr);
+ if (!pl) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ msg_arg->cmd = OPTEE_MSG_CMD_REGISTER_SHM;
+ msg_arg->params->attr = OPTEE_MSG_ATTR_TYPE_TMEM_OUTPUT |
+ OPTEE_MSG_ATTR_NONCONTIG;
+ msg_arg->params->u.tmem.buf_ptr = ph_ptr;
+ msg_arg->params->u.tmem.shm_ref = (ulong)shm;
+ msg_arg->params->u.tmem.size = shm->size;
+
+ if (do_call_with_arg(dev, msg_arg) || msg_arg->ret)
+ rc = -EINVAL;
+
+ free(pl);
+out:
+ tee_shm_free(shm_arg);
+ return rc;
+}
+
+static int optee_shm_unregister(struct udevice *dev, struct tee_shm *shm)
+{
+ struct tee_shm *shm_arg;
+ struct optee_msg_arg *msg_arg;
+ int rc = 0;
+
+ shm_arg = get_msg_arg(dev, 1, &msg_arg);
+ if (!shm_arg)
+ return -ENOMEM;
+
+ msg_arg->cmd = OPTEE_MSG_CMD_UNREGISTER_SHM;
+ msg_arg->params[0].attr = OPTEE_MSG_ATTR_TYPE_RMEM_INPUT;
+ msg_arg->params[0].u.rmem.shm_ref = (ulong)shm;
+
+ if (do_call_with_arg(dev, msg_arg) || msg_arg->ret)
+ rc = -EINVAL;
+ tee_shm_free(shm_arg);
+ return rc;
+}
+
+static const struct tee_driver_ops optee_ops = {
+ .get_version = optee_get_version,
+ .open_session = optee_open_session,
+ .close_session = optee_close_session,
+ .invoke_func = optee_invoke_func,
+ .shm_register = optee_shm_register,
+ .shm_unregister = optee_shm_unregister,
+};
+
+static bool is_optee_api(optee_invoke_fn *invoke_fn)
+{
+ struct arm_smccc_res res;
+
+ invoke_fn(OPTEE_SMC_CALLS_UID, 0, 0, 0, 0, 0, 0, 0, &res);
+
+ return res.a0 == OPTEE_MSG_UID_0 && res.a1 == OPTEE_MSG_UID_1 &&
+ res.a2 == OPTEE_MSG_UID_2 && res.a3 == OPTEE_MSG_UID_3;
+}
+
+static void print_os_revision(optee_invoke_fn *invoke_fn)
+{
+ union {
+ struct arm_smccc_res smccc;
+ struct optee_smc_call_get_os_revision_result result;
+ } res = {
+ .result = {
+ .build_id = 0
+ }
+ };
+
+ invoke_fn(OPTEE_SMC_CALL_GET_OS_REVISION, 0, 0, 0, 0, 0, 0, 0,
+ &res.smccc);
+
+ if (res.result.build_id)
+ debug("OP-TEE revision %lu.%lu (%08lx)\n", res.result.major,
+ res.result.minor, res.result.build_id);
+ else
+ debug("OP-TEE revision %lu.%lu\n", res.result.major,
+ res.result.minor);
+}
+
+static bool api_revision_is_compatible(optee_invoke_fn *invoke_fn)
+{
+ union {
+ struct arm_smccc_res smccc;
+ struct optee_smc_calls_revision_result result;
+ } res;
+
+ invoke_fn(OPTEE_SMC_CALLS_REVISION, 0, 0, 0, 0, 0, 0, 0, &res.smccc);
+
+ return res.result.major == OPTEE_MSG_REVISION_MAJOR &&
+ (int)res.result.minor >= OPTEE_MSG_REVISION_MINOR;
+}
+
+static bool exchange_capabilities(optee_invoke_fn *invoke_fn, u32 *sec_caps)
+{
+ union {
+ struct arm_smccc_res smccc;
+ struct optee_smc_exchange_capabilities_result result;
+ } res;
+
+ invoke_fn(OPTEE_SMC_EXCHANGE_CAPABILITIES,
+ OPTEE_SMC_NSEC_CAP_UNIPROCESSOR, 0, 0, 0, 0, 0, 0,
+ &res.smccc);
+
+ if (res.result.status != OPTEE_SMC_RETURN_OK)
+ return false;
+
+ *sec_caps = res.result.capabilities;
+ return true;
+}
+
+/* Simple wrapper functions to be able to use a function pointer */
+static void optee_smccc_smc(unsigned long a0, unsigned long a1,
+ unsigned long a2, unsigned long a3,
+ unsigned long a4, unsigned long a5,
+ unsigned long a6, unsigned long a7,
+ struct arm_smccc_res *res)
+{
+ arm_smccc_smc(a0, a1, a2, a3, a4, a5, a6, a7, res);
+}
+
+static void optee_smccc_hvc(unsigned long a0, unsigned long a1,
+ unsigned long a2, unsigned long a3,
+ unsigned long a4, unsigned long a5,
+ unsigned long a6, unsigned long a7,
+ struct arm_smccc_res *res)
+{
+ arm_smccc_hvc(a0, a1, a2, a3, a4, a5, a6, a7, res);
+}
+
+static optee_invoke_fn *get_invoke_func(struct udevice *dev)
+{
+ const char *method;
+
+ debug("optee: looking for conduit method in DT.\n");
+ method = ofnode_get_property(dev->node, "method", NULL);
+ if (!method) {
+ debug("optee: missing \"method\" property\n");
+ return ERR_PTR(-ENXIO);
+ }
+
+ if (!strcmp("hvc", method))
+ return optee_smccc_hvc;
+ else if (!strcmp("smc", method))
+ return optee_smccc_smc;
+
+ debug("optee: invalid \"method\" property: %s\n", method);
+ return ERR_PTR(-EINVAL);
+}
+
+static int optee_ofdata_to_platdata(struct udevice *dev)
+{
+ struct optee_pdata *pdata = dev_get_platdata(dev);
+
+ pdata->invoke_fn = get_invoke_func(dev);
+ if (IS_ERR(pdata->invoke_fn))
+ return PTR_ERR(pdata->invoke_fn);
+
+ return 0;
+}
+
+static int optee_probe(struct udevice *dev)
+{
+ struct optee_pdata *pdata = dev_get_platdata(dev);
+ u32 sec_caps;
+
+ if (!is_optee_api(pdata->invoke_fn)) {
+ debug("%s: OP-TEE api uid mismatch\n", __func__);
+ return -ENOENT;
+ }
+
+ print_os_revision(pdata->invoke_fn);
+
+ if (!api_revision_is_compatible(pdata->invoke_fn)) {
+ debug("%s: OP-TEE api revision mismatch\n", __func__);
+ return -ENOENT;
+ }
+
+ /*
+ * OP-TEE can use both shared memory via predefined pool or as
+ * dynamic shared memory provided by normal world. To keep things
+ * simple we're only using dynamic shared memory in this driver.
+ */
+ if (!exchange_capabilities(pdata->invoke_fn, &sec_caps) ||
+ !(sec_caps & OPTEE_SMC_SEC_CAP_DYNAMIC_SHM)) {
+ debug("%s: OP-TEE capabilities mismatch\n", __func__);
+ return -ENOENT;
+ }
+
+ return 0;
+}
+
+static const struct udevice_id optee_match[] = {
+ { .compatible = "linaro,optee-tz" },
+ {},
+};
+
+U_BOOT_DRIVER(optee) = {
+ .name = "optee",
+ .id = UCLASS_TEE,
+ .of_match = optee_match,
+ .ofdata_to_platdata = optee_ofdata_to_platdata,
+ .probe = optee_probe,
+ .ops = &optee_ops,
+ .platdata_auto_alloc_size = sizeof(struct optee_pdata),
+};
diff --git a/drivers/tee/optee/optee_msg.h b/drivers/tee/optee/optee_msg.h
new file mode 100644
index 000000000000..ebc16aa8cc31
--- /dev/null
+++ b/drivers/tee/optee/optee_msg.h
@@ -0,0 +1,423 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+/*
+ * Copyright (c) 2015-2018, Linaro Limited
+ */
+
+#ifndef _OPTEE_MSG_H
+#define _OPTEE_MSG_H
+
+#include <linux/bitops.h>
+#include <linux/types.h>
+
+/*
+ * This file defines the OP-TEE message protocol used to communicate
+ * with an instance of OP-TEE running in secure world.
+ *
+ * This file is divided into three sections.
+ * 1. Formatting of messages.
+ * 2. Requests from normal world
+ * 3. Requests from secure world, Remote Procedure Call (RPC), handled by
+ * tee-supplicant.
+ */
+
+/*****************************************************************************
+ * Part 1 - formatting of messages
+ *****************************************************************************/
+
+#define OPTEE_MSG_ATTR_TYPE_NONE 0x0
+#define OPTEE_MSG_ATTR_TYPE_VALUE_INPUT 0x1
+#define OPTEE_MSG_ATTR_TYPE_VALUE_OUTPUT 0x2
+#define OPTEE_MSG_ATTR_TYPE_VALUE_INOUT 0x3
+#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_TMEM_INPUT 0x9
+#define OPTEE_MSG_ATTR_TYPE_TMEM_OUTPUT 0xa
+#define OPTEE_MSG_ATTR_TYPE_TMEM_INOUT 0xb
+
+#define OPTEE_MSG_ATTR_TYPE_MASK GENMASK(7, 0)
+
+/*
+ * Meta parameter to be absorbed by the Secure OS and not passed
+ * to the Trusted Application.
+ *
+ * Currently only used with OPTEE_MSG_CMD_OPEN_SESSION.
+ */
+#define OPTEE_MSG_ATTR_META BIT(8)
+
+/*
+ * Pointer to a list of pages used to register user-defined SHM buffer.
+ * Used with OPTEE_MSG_ATTR_TYPE_TMEM_*.
+ * buf_ptr should point to the beginning of the buffer. Buffer will contain
+ * list of page addresses. OP-TEE core can reconstruct contiguous buffer from
+ * that page addresses list. Page addresses are stored as 64 bit values.
+ * Last entry on a page should point to the next page of buffer.
+ * Every entry in buffer should point to a 4k page beginning (12 least
+ * significant bits must be equal to zero).
+ *
+ * 12 least significant bints of optee_msg_param.u.tmem.buf_ptr should hold page
+ * offset of the user buffer.
+ *
+ * So, entries should be placed like members of this structure:
+ *
+ * struct page_data {
+ * uint64_t pages_array[OPTEE_MSG_NONCONTIG_PAGE_SIZE/sizeof(uint64_t) - 1];
+ * uint64_t next_page_data;
+ * };
+ *
+ * Structure is designed to exactly fit into the page size
+ * OPTEE_MSG_NONCONTIG_PAGE_SIZE which is a standard 4KB page.
+ *
+ * The size of 4KB is chosen because this is the smallest page size for ARM
+ * architectures. If REE uses larger pages, it should divide them to 4KB ones.
+ */
+#define OPTEE_MSG_ATTR_NONCONTIG BIT(9)
+
+/*
+ * Memory attributes for caching passed with temp memrefs. The actual value
+ * used is defined outside the message protocol with the exception of
+ * OPTEE_MSG_ATTR_CACHE_PREDEFINED which means the attributes already
+ * defined for the memory range should be used. If optee_smc.h is used as
+ * bearer of this protocol OPTEE_SMC_SHM_* is used for values.
+ */
+#define OPTEE_MSG_ATTR_CACHE_SHIFT 16
+#define OPTEE_MSG_ATTR_CACHE_MASK GENMASK(2, 0)
+#define OPTEE_MSG_ATTR_CACHE_PREDEFINED 0
+
+/*
+ * Same values as TEE_LOGIN_* from TEE Internal API
+ */
+#define OPTEE_MSG_LOGIN_PUBLIC 0x00000000
+#define OPTEE_MSG_LOGIN_USER 0x00000001
+#define OPTEE_MSG_LOGIN_GROUP 0x00000002
+#define OPTEE_MSG_LOGIN_APPLICATION 0x00000004
+#define OPTEE_MSG_LOGIN_APPLICATION_USER 0x00000005
+#define OPTEE_MSG_LOGIN_APPLICATION_GROUP 0x00000006
+
+/*
+ * Page size used in non-contiguous buffer entries
+ */
+#define OPTEE_MSG_NONCONTIG_PAGE_SIZE 4096
+
+/**
+ * struct optee_msg_param_tmem - temporary memory reference parameter
+ * @buf_ptr: Address of the buffer
+ * @size: Size of the buffer
+ * @shm_ref: Temporary shared memory reference, pointer to a struct tee_shm
+ *
+ * Secure and normal world communicates pointers as physical address
+ * instead of the virtual address. This is because secure and normal world
+ * have completely independent memory mapping. Normal world can even have a
+ * hypervisor which need to translate the guest physical address (AKA IPA
+ * in ARM documentation) to a real physical address before passing the
+ * structure to secure world.
+ */
+struct optee_msg_param_tmem {
+ u64 buf_ptr;
+ u64 size;
+ u64 shm_ref;
+};
+
+/**
+ * struct optee_msg_param_rmem - registered memory reference parameter
+ * @offs: Offset into shared memory reference
+ * @size: Size of the buffer
+ * @shm_ref: Shared memory reference, pointer to a struct tee_shm
+ */
+struct optee_msg_param_rmem {
+ u64 offs;
+ u64 size;
+ u64 shm_ref;
+};
+
+/**
+ * struct optee_msg_param_value - opaque value parameter
+ *
+ * Value parameters are passed unchecked between normal and secure world.
+ */
+struct optee_msg_param_value {
+ u64 a;
+ u64 b;
+ u64 c;
+};
+
+/**
+ * struct optee_msg_param - parameter used together with struct optee_msg_arg
+ * @attr: attributes
+ * @tmem: parameter by temporary memory reference
+ * @rmem: parameter by registered memory reference
+ * @value: parameter by opaque value
+ *
+ * @attr & OPTEE_MSG_ATTR_TYPE_MASK indicates if tmem, rmem or value is used in
+ * the union. OPTEE_MSG_ATTR_TYPE_VALUE_* indicates value,
+ * OPTEE_MSG_ATTR_TYPE_TMEM_* indicates @tmem and
+ * OPTEE_MSG_ATTR_TYPE_RMEM_* indicates @rmem,
+ * OPTEE_MSG_ATTR_TYPE_NONE indicates that none of the members are used.
+ */
+struct optee_msg_param {
+ u64 attr;
+ union {
+ struct optee_msg_param_tmem tmem;
+ struct optee_msg_param_rmem rmem;
+ struct optee_msg_param_value value;
+ } u;
+};
+
+/**
+ * struct optee_msg_arg - call argument
+ * @cmd: Command, one of OPTEE_MSG_CMD_* or OPTEE_MSG_RPC_CMD_*
+ * @func: Trusted Application function, specific to the Trusted Application,
+ * used if cmd == OPTEE_MSG_CMD_INVOKE_COMMAND
+ * @session: In parameter for all OPTEE_MSG_CMD_* except
+ * OPTEE_MSG_CMD_OPEN_SESSION where it's an output parameter instead
+ * @cancel_id: Cancellation id, a unique value to identify this request
+ * @ret: return value
+ * @ret_origin: origin of the return value
+ * @num_params: number of parameters supplied to the OS Command
+ * @params: the parameters supplied to the OS Command
+ *
+ * All normal calls to Trusted OS uses this struct. If cmd requires further
+ * information than what these field holds it can be passed as a parameter
+ * tagged as meta (setting the OPTEE_MSG_ATTR_META bit in corresponding
+ * attrs field). All parameters tagged as meta has to come first.
+ *
+ * Temp memref parameters can be fragmented if supported by the Trusted OS
+ * (when optee_smc.h is bearer of this protocol this is indicated with
+ * OPTEE_SMC_SEC_CAP_UNREGISTERED_SHM). If a logical memref parameter is
+ * fragmented then has all but the last fragment the
+ * OPTEE_MSG_ATTR_FRAGMENT bit set in attrs. Even if a memref is fragmented
+ * it will still be presented as a single logical memref to the Trusted
+ * Application.
+ */
+struct optee_msg_arg {
+ u32 cmd;
+ u32 func;
+ u32 session;
+ u32 cancel_id;
+ u32 pad;
+ u32 ret;
+ u32 ret_origin;
+ u32 num_params;
+
+ /* num_params tells the actual number of element in params */
+ struct optee_msg_param params[0];
+};
+
+/**
+ * OPTEE_MSG_GET_ARG_SIZE - return size of struct optee_msg_arg
+ *
+ * @num_params: Number of parameters embedded in the struct optee_msg_arg
+ *
+ * Returns the size of the struct optee_msg_arg together with the number
+ * of embedded parameters.
+ */
+#define OPTEE_MSG_GET_ARG_SIZE(num_params) \
+ (sizeof(struct optee_msg_arg) + \
+ sizeof(struct optee_msg_param) * (num_params))
+
+/*****************************************************************************
+ * Part 2 - requests from normal world
+ *****************************************************************************/
+
+/*
+ * Return the following UID if using API specified in this file without
+ * further extensions:
+ * 384fb3e0-e7f8-11e3-af63-0002a5d5c51b.
+ * Represented in 4 32-bit words in OPTEE_MSG_UID_0, OPTEE_MSG_UID_1,
+ * OPTEE_MSG_UID_2, OPTEE_MSG_UID_3.
+ */
+#define OPTEE_MSG_UID_0 0x384fb3e0
+#define OPTEE_MSG_UID_1 0xe7f811e3
+#define OPTEE_MSG_UID_2 0xaf630002
+#define OPTEE_MSG_UID_3 0xa5d5c51b
+#define OPTEE_MSG_FUNCID_CALLS_UID 0xFF01
+
+/*
+ * Returns 2.0 if using API specified in this file without further
+ * extensions. Represented in 2 32-bit words in OPTEE_MSG_REVISION_MAJOR
+ * and OPTEE_MSG_REVISION_MINOR
+ */
+#define OPTEE_MSG_REVISION_MAJOR 2
+#define OPTEE_MSG_REVISION_MINOR 0
+#define OPTEE_MSG_FUNCID_CALLS_REVISION 0xFF03
+
+/*
+ * Get UUID of Trusted OS.
+ *
+ * Used by non-secure world to figure out which Trusted OS is installed.
+ * Note that returned UUID is the UUID of the Trusted OS, not of the API.
+ *
+ * Returns UUID in 4 32-bit words in the same way as
+ * OPTEE_MSG_FUNCID_CALLS_UID described above.
+ */
+#define OPTEE_MSG_OS_OPTEE_UUID_0 0x486178e0
+#define OPTEE_MSG_OS_OPTEE_UUID_1 0xe7f811e3
+#define OPTEE_MSG_OS_OPTEE_UUID_2 0xbc5e0002
+#define OPTEE_MSG_OS_OPTEE_UUID_3 0xa5d5c51b
+#define OPTEE_MSG_FUNCID_GET_OS_UUID 0x0000
+
+/*
+ * Get revision of Trusted OS.
+ *
+ * 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.
+ *
+ * Returns revision in 2 32-bit words in the same way as
+ * OPTEE_MSG_CALLS_REVISION described above.
+ */
+#define OPTEE_MSG_FUNCID_GET_OS_REVISION 0x0001
+
+/*
+ * Do a secure call with struct optee_msg_arg as argument
+ * The OPTEE_MSG_CMD_* below defines what goes in struct optee_msg_arg::cmd
+ *
+ * OPTEE_MSG_CMD_OPEN_SESSION opens a session to a Trusted Application.
+ * The first two parameters are tagged as meta, holding two value
+ * parameters to pass the following information:
+ * param[0].u.value.a-b uuid of Trusted Application
+ * param[1].u.value.a-b uuid of Client
+ * param[1].u.value.c Login class of client OPTEE_MSG_LOGIN_*
+ *
+ * OPTEE_MSG_CMD_INVOKE_COMMAND invokes a command a previously opened
+ * session to a Trusted Application. struct optee_msg_arg::func is Trusted
+ * Application function, specific to the Trusted Application.
+ *
+ * OPTEE_MSG_CMD_CLOSE_SESSION closes a previously opened session to
+ * Trusted Application.
+ *
+ * OPTEE_MSG_CMD_CANCEL cancels a currently invoked command.
+ *
+ * OPTEE_MSG_CMD_REGISTER_SHM registers a shared memory reference. The
+ * information is passed as:
+ * [in] param[0].attr OPTEE_MSG_ATTR_TYPE_TMEM_INPUT
+ * [| OPTEE_MSG_ATTR_FRAGMENT]
+ * [in] param[0].u.tmem.buf_ptr physical address (of first fragment)
+ * [in] param[0].u.tmem.size size (of first fragment)
+ * [in] param[0].u.tmem.shm_ref holds shared memory reference
+ * ...
+ * The shared memory can optionally be fragmented, temp memrefs can follow
+ * each other with all but the last with the OPTEE_MSG_ATTR_FRAGMENT bit set.
+ *
+ * OPTEE_MSG_CMD_UNREGISTER_SHM unregisteres a previously registered shared
+ * memory reference. The information is passed as:
+ * [in] param[0].attr OPTEE_MSG_ATTR_TYPE_RMEM_INPUT
+ * [in] param[0].u.rmem.shm_ref holds shared memory reference
+ * [in] param[0].u.rmem.offs 0
+ * [in] param[0].u.rmem.size 0
+ */
+#define OPTEE_MSG_CMD_OPEN_SESSION 0
+#define OPTEE_MSG_CMD_INVOKE_COMMAND 1
+#define OPTEE_MSG_CMD_CLOSE_SESSION 2
+#define OPTEE_MSG_CMD_CANCEL 3
+#define OPTEE_MSG_CMD_REGISTER_SHM 4
+#define OPTEE_MSG_CMD_UNREGISTER_SHM 5
+#define OPTEE_MSG_FUNCID_CALL_WITH_ARG 0x0004
+
+/*****************************************************************************
+ * Part 3 - Requests from secure world, RPC
+ *****************************************************************************/
+
+/*
+ * All RPC is done with a struct optee_msg_arg as bearer of information,
+ * struct optee_msg_arg::arg holds values defined by OPTEE_MSG_RPC_CMD_* below
+ *
+ * RPC communication with tee-supplicant is reversed compared to normal
+ * client communication desribed above. The supplicant receives requests
+ * and sends responses.
+ */
+
+/*
+ * Load a TA into memory, defined in tee-supplicant
+ */
+#define OPTEE_MSG_RPC_CMD_LOAD_TA 0
+
+/*
+ * Reserved
+ */
+#define OPTEE_MSG_RPC_CMD_RPMB 1
+
+/*
+ * File system access, defined in tee-supplicant
+ */
+#define OPTEE_MSG_RPC_CMD_FS 2
+
+/*
+ * Get time
+ *
+ * Returns number of seconds and nano seconds since the Epoch,
+ * 1970-01-01 00:00:00 +0000 (UTC).
+ *
+ * [out] param[0].u.value.a Number of seconds
+ * [out] param[0].u.value.b Number of nano seconds.
+ */
+#define OPTEE_MSG_RPC_CMD_GET_TIME 3
+
+/*
+ * Wait queue primitive, helper for secure world to implement a wait queue.
+ *
+ * If secure world need to wait for a secure world mutex it issues a sleep
+ * request instead of spinning in secure world. Conversely is a wakeup
+ * request issued when a secure world mutex with a thread waiting thread is
+ * unlocked.
+ *
+ * Waiting on a key
+ * [in] param[0].u.value.a OPTEE_MSG_RPC_WAIT_QUEUE_SLEEP
+ * [in] param[0].u.value.b wait key
+ *
+ * Waking up a key
+ * [in] param[0].u.value.a OPTEE_MSG_RPC_WAIT_QUEUE_WAKEUP
+ * [in] param[0].u.value.b wakeup key
+ */
+#define OPTEE_MSG_RPC_CMD_WAIT_QUEUE 4
+#define OPTEE_MSG_RPC_WAIT_QUEUE_SLEEP 0
+#define OPTEE_MSG_RPC_WAIT_QUEUE_WAKEUP 1
+
+/*
+ * Suspend execution
+ *
+ * [in] param[0].value .a number of milliseconds to suspend
+ */
+#define OPTEE_MSG_RPC_CMD_SUSPEND 5
+
+/*
+ * Allocate a piece of shared memory
+ *
+ * Shared memory can optionally be fragmented, to support that additional
+ * spare param entries are allocated to make room for eventual fragments.
+ * The spare param entries has .attr = OPTEE_MSG_ATTR_TYPE_NONE when
+ * unused. All returned temp memrefs except the last should have the
+ * OPTEE_MSG_ATTR_FRAGMENT bit set in the attr field.
+ *
+ * [in] param[0].u.value.a type of memory one of
+ * OPTEE_MSG_RPC_SHM_TYPE_* below
+ * [in] param[0].u.value.b requested size
+ * [in] param[0].u.value.c required alignment
+ *
+ * [out] param[0].u.tmem.buf_ptr physical address (of first fragment)
+ * [out] param[0].u.tmem.size size (of first fragment)
+ * [out] param[0].u.tmem.shm_ref shared memory reference
+ * ...
+ * [out] param[n].u.tmem.buf_ptr physical address
+ * [out] param[n].u.tmem.size size
+ * [out] param[n].u.tmem.shm_ref shared memory reference (same value
+ * as in param[n-1].u.tmem.shm_ref)
+ */
+#define OPTEE_MSG_RPC_CMD_SHM_ALLOC 6
+/* Memory that can be shared with a non-secure user space application */
+#define OPTEE_MSG_RPC_SHM_TYPE_APPL 0
+/* Memory only shared with non-secure kernel */
+#define OPTEE_MSG_RPC_SHM_TYPE_KERNEL 1
+
+/*
+ * Free shared memory previously allocated with OPTEE_MSG_RPC_CMD_SHM_ALLOC
+ *
+ * [in] param[0].u.value.a type of memory one of
+ * OPTEE_MSG_RPC_SHM_TYPE_* above
+ * [in] param[0].u.value.b value of shared memory reference
+ * returned in param[0].u.tmem.shm_ref
+ * above
+ */
+#define OPTEE_MSG_RPC_CMD_SHM_FREE 7
+
+#endif /* _OPTEE_MSG_H */
diff --git a/drivers/tee/optee/optee_msg_supplicant.h b/drivers/tee/optee/optee_msg_supplicant.h
new file mode 100644
index 000000000000..65ca6c0574b9
--- /dev/null
+++ b/drivers/tee/optee/optee_msg_supplicant.h
@@ -0,0 +1,234 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+/*
+ * Copyright (c) 2016-2018, Linaro Limited
+ */
+
+#ifndef __OPTEE_MSG_SUPPLICANT_H
+#define __OPTEE_MSG_SUPPLICANT_H
+
+/*
+ * Load a TA into memory
+ */
+#define OPTEE_MSG_RPC_CMD_LOAD_TA 0
+
+/*
+ * Replay Protected Memory Block access
+ */
+#define OPTEE_MSG_RPC_CMD_RPMB 1
+
+/*
+ * File system access
+ */
+#define OPTEE_MSG_RPC_CMD_FS 2
+
+/*
+ * Define protocol for messages with .cmd == OPTEE_MSG_RPC_CMD_FS and first
+ * parameter has the attribute OPTEE_MSG_ATTR_TYPE_VALUE_INPUT.
+ */
+
+/*
+ * Open a file
+ *
+ * [in] param[0].u.value.a OPTEE_MRF_OPEN
+ * [in] param[1].u.tmem a string holding the file name
+ * [out] param[2].u.value.a file descriptor of open file
+ */
+#define OPTEE_MRF_OPEN 0
+
+/*
+ * Create a file
+ *
+ * [in] param[0].u.value.a OPTEE_MRF_CREATE
+ * [in] param[1].u.tmem a string holding the file name
+ * [out] param[2].u.value.a file descriptor of open file
+ */
+#define OPTEE_MRF_CREATE 1
+
+/*
+ * Close a file
+ *
+ * [in] param[0].u.value.a OPTEE_MRF_CLOSE
+ * [in] param[0].u.value.b file descriptor of open file.
+ */
+#define OPTEE_MRF_CLOSE 2
+
+/*
+ * Read from a file
+ *
+ * [in] param[0].u.value.a OPTEE_MRF_READ
+ * [in] param[0].u.value.b file descriptor of open file
+ * [in] param[0].u.value.c offset into file
+ * [out] param[1].u.tmem buffer to hold returned data
+ */
+#define OPTEE_MRF_READ 3
+
+/*
+ * Write to a file
+ *
+ * [in] param[0].u.value.a OPTEE_MRF_WRITE
+ * [in] param[0].u.value.b file descriptor of open file
+ * [in] param[0].u.value.c offset into file
+ * [in] param[1].u.tmem buffer holding data to be written
+ */
+#define OPTEE_MRF_WRITE 4
+
+/*
+ * Truncate a file
+ *
+ * [in] param[0].u.value.a OPTEE_MRF_TRUNCATE
+ * [in] param[0].u.value.b file descriptor of open file
+ * [in] param[0].u.value.c length of file.
+ */
+#define OPTEE_MRF_TRUNCATE 5
+
+/*
+ * Remove a file
+ *
+ * [in] param[0].u.value.a OPTEE_MRF_REMOVE
+ * [in] param[1].u.tmem a string holding the file name
+ */
+#define OPTEE_MRF_REMOVE 6
+
+/*
+ * Rename a file
+ *
+ * [in] param[0].u.value.a OPTEE_MRF_RENAME
+ * [in] param[0].u.value.b true if existing target should be removed
+ * [in] param[1].u.tmem a string holding the old file name
+ * [in] param[2].u.tmem a string holding the new file name
+ */
+#define OPTEE_MRF_RENAME 7
+
+/*
+ * Opens a directory for file listing
+ *
+ * [in] param[0].u.value.a OPTEE_MRF_OPENDIR
+ * [in] param[1].u.tmem a string holding the name of the directory
+ * [out] param[2].u.value.a handle to open directory
+ */
+#define OPTEE_MRF_OPENDIR 8
+
+/*
+ * Closes a directory handle
+ *
+ * [in] param[0].u.value.a OPTEE_MRF_CLOSEDIR
+ * [in] param[0].u.value.b handle to open directory
+ */
+#define OPTEE_MRF_CLOSEDIR 9
+
+/*
+ * Read next file name of directory
+ *
+ *
+ * [in] param[0].u.value.a OPTEE_MRF_READDIR
+ * [in] param[0].u.value.b handle to open directory
+ * [out] param[1].u.tmem a string holding the file name
+ */
+#define OPTEE_MRF_READDIR 10
+
+/*
+ * End of definitions for messages with .cmd == OPTEE_MSG_RPC_CMD_FS
+ */
+
+/*
+ * Command Ids 3, 4 and 5 of OPTEE_MSG_RPC_CMD_xxx macros are reserved for use
+ * by the kernel driver.
+ */
+
+/*
+ * Shared memory allocation
+ */
+#define OPTEE_MSG_RPC_CMD_SHM_ALLOC 6
+#define OPTEE_MSG_RPC_CMD_SHM_FREE 7
+
+/*
+ * Was OPTEE_MSG_RPC_CMD_SQL_FS, which isn't supported any longer
+ */
+#define OPTEE_MSG_RPC_CMD_SQL_FS_RESERVED 8
+
+/*
+ * GPROF support management commands
+ */
+#define OPTEE_MSG_RPC_CMD_GPROF 9
+
+/*
+ * Socket commands
+ */
+#define OPTEE_MSG_RPC_CMD_SOCKET 10
+
+/*
+ * Define protocol for messages with .cmd == OPTEE_MSG_RPC_CMD_SOCKET
+ */
+
+#define OPTEE_MRC_SOCKET_TIMEOUT_NONBLOCKING 0
+#define OPTEE_MRC_SOCKET_TIMEOUT_BLOCKING 0xffffffff
+
+/*
+ * Open socket
+ *
+ * [in] param[0].u.value.a OPTEE_MRC_SOCKET_OPEN
+ * [in] param[0].u.value.b TA instance id
+ * [in] param[1].u.value.a server port number
+ * [in] param[1].u.value.b protocol, TEE_ISOCKET_PROTOCOLID_*
+ * [in] param[1].u.value.c ip version TEE_IP_VERSION_* from tee_ipsocket.h
+ * [in] param[2].u.tmem server address
+ * [out] param[3].u.value.a socket handle (32-bit)
+ */
+#define OPTEE_MRC_SOCKET_OPEN 0
+
+/*
+ * Close socket
+ *
+ * [in] param[0].u.value.a OPTEE_MRC_SOCKET_CLOSE
+ * [in] param[0].u.value.b TA instance id
+ * [in] param[0].u.value.c socket handle
+ */
+#define OPTEE_MRC_SOCKET_CLOSE 1
+
+/*
+ * Close all sockets
+ *
+ * [in] param[0].u.value.a OPTEE_MRC_SOCKET_CLOSE_ALL
+ * [in] param[0].u.value.b TA instance id
+ */
+#define OPTEE_MRC_SOCKET_CLOSE_ALL 2
+
+/*
+ * Send data on socket
+ *
+ * [in] param[0].u.value.a OPTEE_MRC_SOCKET_SEND
+ * [in] param[0].u.value.b TA instance id
+ * [in] param[0].u.value.c socket handle
+ * [in] param[1].u.tmem buffer to transmit
+ * [in] param[2].u.value.a timeout ms or OPTEE_MRC_SOCKET_TIMEOUT_*
+ * [out] param[2].u.value.b number of transmitted bytes
+ */
+#define OPTEE_MRC_SOCKET_SEND 3
+
+/*
+ * Receive data on socket
+ *
+ * [in] param[0].u.value.a OPTEE_MRC_SOCKET_RECV
+ * [in] param[0].u.value.b TA instance id
+ * [in] param[0].u.value.c socket handle
+ * [out] param[1].u.tmem buffer to receive
+ * [in] param[2].u.value.a timeout ms or OPTEE_MRC_SOCKET_TIMEOUT_*
+ */
+#define OPTEE_MRC_SOCKET_RECV 4
+
+/*
+ * Perform IOCTL on socket
+ *
+ * [in] param[0].u.value.a OPTEE_MRC_SOCKET_IOCTL
+ * [in] param[0].u.value.b TA instance id
+ * [in] param[0].u.value.c socket handle
+ * [in/out] param[1].u.tmem buffer
+ * [in] param[2].u.value.a ioctl command
+ */
+#define OPTEE_MRC_SOCKET_IOCTL 5
+
+/*
+ * End of definitions for messages with .cmd == OPTEE_MSG_RPC_CMD_SOCKET
+ */
+
+#endif /*__OPTEE_MSG_SUPPLICANT_H*/
diff --git a/drivers/tee/optee/optee_private.h b/drivers/tee/optee/optee_private.h
new file mode 100644
index 000000000000..daa470f812a9
--- /dev/null
+++ b/drivers/tee/optee/optee_private.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (c) 2018 Linaro Limited
+ */
+
+#ifndef __OPTEE_PRIVATE_H
+#define __OPTEE_PRIVATE_H
+
+void *optee_alloc_and_init_page_list(void *buf, ulong len, u64 *phys_buf_ptr);
+void optee_suppl_cmd(struct udevice *dev, void *shm, void **page_list);
+
+#endif /*__OPTEE_PRIVATE_H*/
diff --git a/drivers/tee/optee/optee_smc.h b/drivers/tee/optee/optee_smc.h
new file mode 100644
index 000000000000..81069ae6f8ac
--- /dev/null
+++ b/drivers/tee/optee/optee_smc.h
@@ -0,0 +1,444 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+/*
+ * Copyright (c) 2015-2018, Linaro Limited
+ */
+
+#ifndef OPTEE_SMC_H
+#define OPTEE_SMC_H
+
+#include <linux/arm-smccc.h>
+#include <linux/bitops.h>
+
+#define OPTEE_SMC_STD_CALL_VAL(func_num) \
+ ARM_SMCCC_CALL_VAL(ARM_SMCCC_STD_CALL, ARM_SMCCC_SMC_32, \
+ ARM_SMCCC_OWNER_TRUSTED_OS, (func_num))
+#define OPTEE_SMC_FAST_CALL_VAL(func_num) \
+ ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, ARM_SMCCC_SMC_32, \
+ ARM_SMCCC_OWNER_TRUSTED_OS, (func_num))
+
+/*
+ * Function specified by SMC Calling convention.
+ */
+#define OPTEE_SMC_FUNCID_CALLS_COUNT 0xFF00
+#define OPTEE_SMC_CALLS_COUNT \
+ ARM_SMCCC_CALL_VAL(OPTEE_SMC_FAST_CALL, SMCCC_SMC_32, \
+ SMCCC_OWNER_TRUSTED_OS_END, \
+ OPTEE_SMC_FUNCID_CALLS_COUNT)
+
+/*
+ * Normal cached memory (write-back), shareable for SMP systems and not
+ * shareable for UP systems.
+ */
+#define OPTEE_SMC_SHM_CACHED 1
+
+/*
+ * a0..a7 is used as register names in the descriptions below, on arm32
+ * that translates to r0..r7 and on arm64 to w0..w7. In both cases it's
+ * 32-bit registers.
+ */
+
+/*
+ * Function specified by SMC Calling convention
+ *
+ * Return one of the following UIDs if using API specified in this file
+ * without further extentions:
+ * 65cb6b93-af0c-4617-8ed6-644a8d1140f8
+ * see also OPTEE_SMC_UID_* in optee_msg.h
+ */
+#define OPTEE_SMC_FUNCID_CALLS_UID OPTEE_MSG_FUNCID_CALLS_UID
+#define OPTEE_SMC_CALLS_UID \
+ ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, ARM_SMCCC_SMC_32, \
+ ARM_SMCCC_OWNER_TRUSTED_OS_END, \
+ OPTEE_SMC_FUNCID_CALLS_UID)
+
+/*
+ * Function specified by SMC Calling convention
+ *
+ * Returns 2.0 if using API specified in this file without further extentions.
+ * see also OPTEE_MSG_REVISION_* in optee_msg.h
+ */
+#define OPTEE_SMC_FUNCID_CALLS_REVISION OPTEE_MSG_FUNCID_CALLS_REVISION
+#define OPTEE_SMC_CALLS_REVISION \
+ ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, ARM_SMCCC_SMC_32, \
+ ARM_SMCCC_OWNER_TRUSTED_OS_END, \
+ OPTEE_SMC_FUNCID_CALLS_REVISION)
+
+struct optee_smc_calls_revision_result {
+ unsigned long major;
+ unsigned long minor;
+ unsigned long reserved0;
+ unsigned long reserved1;
+};
+
+/*
+ * Get UUID of Trusted OS.
+ *
+ * Used by non-secure world to figure out which Trusted OS is installed.
+ * Note that returned UUID is the UUID of the Trusted OS, not of the API.
+ *
+ * Returns UUID in a0-4 in the same way as OPTEE_SMC_CALLS_UID
+ * described above.
+ */
+#define OPTEE_SMC_FUNCID_GET_OS_UUID OPTEE_MSG_FUNCID_GET_OS_UUID
+#define OPTEE_SMC_CALL_GET_OS_UUID \
+ OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_GET_OS_UUID)
+
+/*
+ * Get revision of Trusted OS.
+ *
+ * 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.
+ *
+ * Returns revision in a0-1 in the same way as OPTEE_SMC_CALLS_REVISION
+ * described above. May optionally return a 32-bit build identifier in a2,
+ * with zero meaning unspecified.
+ */
+#define OPTEE_SMC_FUNCID_GET_OS_REVISION OPTEE_MSG_FUNCID_GET_OS_REVISION
+#define OPTEE_SMC_CALL_GET_OS_REVISION \
+ OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_GET_OS_REVISION)
+
+struct optee_smc_call_get_os_revision_result {
+ unsigned long major;
+ unsigned long minor;
+ unsigned long build_id;
+ unsigned long reserved1;
+};
+
+/*
+ * Call with struct optee_msg_arg as argument
+ *
+ * Call register usage:
+ * a0 SMC Function ID, OPTEE_SMC*CALL_WITH_ARG
+ * a1 Upper 32bit of a 64bit physical pointer to a struct optee_msg_arg
+ * a2 Lower 32bit of a 64bit physical pointer to a struct optee_msg_arg
+ * a3 Cache settings, not used if physical pointer is in a predefined shared
+ * memory area else per OPTEE_SMC_SHM_*
+ * a4-6 Not used
+ * a7 Hypervisor Client ID register
+ *
+ * Normal return register usage:
+ * a0 Return value, OPTEE_SMC_RETURN_*
+ * a1-3 Not used
+ * a4-7 Preserved
+ *
+ * OPTEE_SMC_RETURN_ETHREAD_LIMIT return register usage:
+ * a0 Return value, OPTEE_SMC_RETURN_ETHREAD_LIMIT
+ * a1-3 Preserved
+ * a4-7 Preserved
+ *
+ * RPC return register usage:
+ * a0 Return value, OPTEE_SMC_RETURN_IS_RPC(val)
+ * a1-2 RPC parameters
+ * a3-7 Resume information, must be preserved
+ *
+ * Possible return values:
+ * OPTEE_SMC_RETURN_UNKNOWN_FUNCTION Trusted OS does not recognize this
+ * function.
+ * OPTEE_SMC_RETURN_OK Call completed, result updated in
+ * the previously supplied struct
+ * optee_msg_arg.
+ * OPTEE_SMC_RETURN_ETHREAD_LIMIT Number of Trusted OS threads exceeded,
+ * try again later.
+ * OPTEE_SMC_RETURN_EBADADDR Bad physcial pointer to struct
+ * optee_msg_arg.
+ * OPTEE_SMC_RETURN_EBADCMD Bad/unknown cmd in struct optee_msg_arg
+ * OPTEE_SMC_RETURN_IS_RPC() Call suspended by RPC call to normal
+ * world.
+ */
+#define OPTEE_SMC_FUNCID_CALL_WITH_ARG OPTEE_MSG_FUNCID_CALL_WITH_ARG
+#define OPTEE_SMC_CALL_WITH_ARG \
+ OPTEE_SMC_STD_CALL_VAL(OPTEE_SMC_FUNCID_CALL_WITH_ARG)
+
+/*
+ * Get Shared Memory Config
+ *
+ * Returns the Secure/Non-secure shared memory config.
+ *
+ * Call register usage:
+ * a0 SMC Function ID, OPTEE_SMC_GET_SHM_CONFIG
+ * a1-6 Not used
+ * a7 Hypervisor Client ID register
+ *
+ * Have config return register usage:
+ * a0 OPTEE_SMC_RETURN_OK
+ * a1 Physical address of start of SHM
+ * a2 Size of of SHM
+ * a3 Cache settings of memory, as defined by the
+ * OPTEE_SMC_SHM_* values above
+ * a4-7 Preserved
+ *
+ * Not available register usage:
+ * a0 OPTEE_SMC_RETURN_ENOTAVAIL
+ * a1-3 Not used
+ * a4-7 Preserved
+ */
+#define OPTEE_SMC_FUNCID_GET_SHM_CONFIG 7
+#define OPTEE_SMC_GET_SHM_CONFIG \
+ OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_GET_SHM_CONFIG)
+
+struct optee_smc_get_shm_config_result {
+ unsigned long status;
+ unsigned long start;
+ unsigned long size;
+ unsigned long settings;
+};
+
+/*
+ * Exchanges capabilities between normal world and secure world
+ *
+ * Call register usage:
+ * a0 SMC Function ID, OPTEE_SMC_EXCHANGE_CAPABILITIES
+ * a1 bitfield of normal world capabilities OPTEE_SMC_NSEC_CAP_*
+ * a2-6 Not used
+ * a7 Hypervisor Client ID register
+ *
+ * Normal return register usage:
+ * a0 OPTEE_SMC_RETURN_OK
+ * a1 bitfield of secure world capabilities OPTEE_SMC_SEC_CAP_*
+ * a2-7 Preserved
+ *
+ * Error return register usage:
+ * a0 OPTEE_SMC_RETURN_ENOTAVAIL, can't use the capabilities from normal world
+ * a1 bitfield of secure world capabilities OPTEE_SMC_SEC_CAP_*
+ * a2-7 Preserved
+ */
+/* Normal world works as a uniprocessor system */
+#define OPTEE_SMC_NSEC_CAP_UNIPROCESSOR BIT(0)
+/* Secure world has reserved shared memory for normal world to use */
+#define OPTEE_SMC_SEC_CAP_HAVE_RESERVED_SHM BIT(0)
+/* Secure world can communicate via previously unregistered shared memory */
+#define OPTEE_SMC_SEC_CAP_UNREGISTERED_SHM BIT(1)
+
+/*
+ * Secure world supports commands "register/unregister shared memory",
+ * secure world accepts command buffers located in any parts of non-secure RAM
+ */
+#define OPTEE_SMC_SEC_CAP_DYNAMIC_SHM BIT(2)
+
+#define OPTEE_SMC_FUNCID_EXCHANGE_CAPABILITIES 9
+#define OPTEE_SMC_EXCHANGE_CAPABILITIES \
+ OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_EXCHANGE_CAPABILITIES)
+
+struct optee_smc_exchange_capabilities_result {
+ unsigned long status;
+ unsigned long capabilities;
+ unsigned long reserved0;
+ unsigned long reserved1;
+};
+
+/*
+ * Disable and empties cache of shared memory objects
+ *
+ * Secure world can cache frequently used shared memory objects, for
+ * example objects used as RPC arguments. When secure world is idle this
+ * function returns one shared memory reference to free. To disable the
+ * cache and free all cached objects this function has to be called until
+ * it returns OPTEE_SMC_RETURN_ENOTAVAIL.
+ *
+ * Call register usage:
+ * a0 SMC Function ID, OPTEE_SMC_DISABLE_SHM_CACHE
+ * a1-6 Not used
+ * a7 Hypervisor Client ID register
+ *
+ * Normal return register usage:
+ * a0 OPTEE_SMC_RETURN_OK
+ * a1 Upper 32bit of a 64bit Shared memory cookie
+ * a2 Lower 32bit of a 64bit Shared memory cookie
+ * a3-7 Preserved
+ *
+ * Cache empty return register usage:
+ * a0 OPTEE_SMC_RETURN_ENOTAVAIL
+ * a1-7 Preserved
+ *
+ * Not idle return register usage:
+ * a0 OPTEE_SMC_RETURN_EBUSY
+ * a1-7 Preserved
+ */
+#define OPTEE_SMC_FUNCID_DISABLE_SHM_CACHE 10
+#define OPTEE_SMC_DISABLE_SHM_CACHE \
+ OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_DISABLE_SHM_CACHE)
+
+struct optee_smc_disable_shm_cache_result {
+ unsigned long status;
+ unsigned long shm_upper32;
+ unsigned long shm_lower32;
+ unsigned long reserved0;
+};
+
+/*
+ * Enable cache of shared memory objects
+ *
+ * Secure world can cache frequently used shared memory objects, for
+ * example objects used as RPC arguments. When secure world is idle this
+ * function returns OPTEE_SMC_RETURN_OK and the cache is enabled. If
+ * secure world isn't idle OPTEE_SMC_RETURN_EBUSY is returned.
+ *
+ * Call register usage:
+ * a0 SMC Function ID, OPTEE_SMC_ENABLE_SHM_CACHE
+ * a1-6 Not used
+ * a7 Hypervisor Client ID register
+ *
+ * Normal return register usage:
+ * a0 OPTEE_SMC_RETURN_OK
+ * a1-7 Preserved
+ *
+ * Not idle return register usage:
+ * a0 OPTEE_SMC_RETURN_EBUSY
+ * a1-7 Preserved
+ */
+#define OPTEE_SMC_FUNCID_ENABLE_SHM_CACHE 11
+#define OPTEE_SMC_ENABLE_SHM_CACHE \
+ OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_ENABLE_SHM_CACHE)
+
+/*
+ * Resume from RPC (for example after processing a foreign interrupt)
+ *
+ * Call register usage:
+ * a0 SMC Function ID, OPTEE_SMC_CALL_RETURN_FROM_RPC
+ * a1-3 Value of a1-3 when OPTEE_SMC_CALL_WITH_ARG returned
+ * OPTEE_SMC_RETURN_RPC in a0
+ *
+ * Return register usage is the same as for OPTEE_SMC_*CALL_WITH_ARG above.
+ *
+ * Possible return values
+ * OPTEE_SMC_RETURN_UNKNOWN_FUNCTION Trusted OS does not recognize this
+ * function.
+ * OPTEE_SMC_RETURN_OK Original call completed, result
+ * updated in the previously supplied.
+ * struct optee_msg_arg
+ * OPTEE_SMC_RETURN_RPC Call suspended by RPC call to normal
+ * world.
+ * OPTEE_SMC_RETURN_ERESUME Resume failed, the opaque resume
+ * information was corrupt.
+ */
+#define OPTEE_SMC_FUNCID_RETURN_FROM_RPC 3
+#define OPTEE_SMC_CALL_RETURN_FROM_RPC \
+ OPTEE_SMC_STD_CALL_VAL(OPTEE_SMC_FUNCID_RETURN_FROM_RPC)
+
+#define OPTEE_SMC_RETURN_RPC_PREFIX_MASK 0xFFFF0000
+#define OPTEE_SMC_RETURN_RPC_PREFIX 0xFFFF0000
+#define OPTEE_SMC_RETURN_RPC_FUNC_MASK 0x0000FFFF
+
+#define OPTEE_SMC_RETURN_GET_RPC_FUNC(ret) \
+ ((ret) & OPTEE_SMC_RETURN_RPC_FUNC_MASK)
+
+#define OPTEE_SMC_RPC_VAL(func) ((func) | OPTEE_SMC_RETURN_RPC_PREFIX)
+
+/*
+ * Allocate memory for RPC parameter passing. The memory is used to hold a
+ * struct optee_msg_arg.
+ *
+ * "Call" register usage:
+ * a0 This value, OPTEE_SMC_RETURN_RPC_ALLOC
+ * a1 Size in bytes of required argument memory
+ * a2 Not used
+ * a3 Resume information, must be preserved
+ * a4-5 Not used
+ * a6-7 Resume information, must be preserved
+ *
+ * "Return" register usage:
+ * a0 SMC Function ID, OPTEE_SMC_CALL_RETURN_FROM_RPC.
+ * a1 Upper 32bits of 64bit physical pointer to allocated
+ * memory, (a1 == 0 && a2 == 0) if size was 0 or if memory can't
+ * be allocated.
+ * a2 Lower 32bits of 64bit physical pointer to allocated
+ * memory, (a1 == 0 && a2 == 0) if size was 0 or if memory can't
+ * be allocated
+ * a3 Preserved
+ * a4 Upper 32bits of 64bit Shared memory cookie used when freeing
+ * the memory or doing an RPC
+ * a5 Lower 32bits of 64bit Shared memory cookie used when freeing
+ * the memory or doing an RPC
+ * a6-7 Preserved
+ */
+#define OPTEE_SMC_RPC_FUNC_ALLOC 0
+#define OPTEE_SMC_RETURN_RPC_ALLOC \
+ OPTEE_SMC_RPC_VAL(OPTEE_SMC_RPC_FUNC_ALLOC)
+
+/*
+ * Free memory previously allocated by OPTEE_SMC_RETURN_RPC_ALLOC
+ *
+ * "Call" register usage:
+ * a0 This value, OPTEE_SMC_RETURN_RPC_FREE
+ * a1 Upper 32bits of 64bit shared memory cookie belonging to this
+ * argument memory
+ * a2 Lower 32bits of 64bit shared memory cookie belonging to this
+ * argument memory
+ * a3-7 Resume information, must be preserved
+ *
+ * "Return" register usage:
+ * a0 SMC Function ID, OPTEE_SMC_CALL_RETURN_FROM_RPC.
+ * a1-2 Not used
+ * a3-7 Preserved
+ */
+#define OPTEE_SMC_RPC_FUNC_FREE 2
+#define OPTEE_SMC_RETURN_RPC_FREE \
+ OPTEE_SMC_RPC_VAL(OPTEE_SMC_RPC_FUNC_FREE)
+
+/*
+ * Deliver foreign interrupt to normal world.
+ *
+ * "Call" register usage:
+ * a0 OPTEE_SMC_RETURN_RPC_FOREIGN_INTR
+ * a1-7 Resume information, must be preserved
+ *
+ * "Return" register usage:
+ * a0 SMC Function ID, OPTEE_SMC_CALL_RETURN_FROM_RPC.
+ * a1-7 Preserved
+ */
+#define OPTEE_SMC_RPC_FUNC_FOREIGN_INTR 4
+#define OPTEE_SMC_RETURN_RPC_FOREIGN_INTR \
+ OPTEE_SMC_RPC_VAL(OPTEE_SMC_RPC_FUNC_FOREIGN_INTR)
+
+/*
+ * Do an RPC request. The supplied struct optee_msg_arg tells which
+ * request to do and the parameters for the request. The following fields
+ * are used (the rest are unused):
+ * - cmd the Request ID
+ * - ret return value of the request, filled in by normal world
+ * - num_params number of parameters for the request
+ * - params the parameters
+ * - param_attrs attributes of the parameters
+ *
+ * "Call" register usage:
+ * a0 OPTEE_SMC_RETURN_RPC_CMD
+ * a1 Upper 32bit of a 64bit Shared memory cookie holding a
+ * struct optee_msg_arg, must be preserved, only the data should
+ * be updated
+ * a2 Lower 32bit of a 64bit Shared memory cookie holding a
+ * struct optee_msg_arg, must be preserved, only the data should
+ * be updated
+ * a3-7 Resume information, must be preserved
+ *
+ * "Return" register usage:
+ * a0 SMC Function ID, OPTEE_SMC_CALL_RETURN_FROM_RPC.
+ * a1-2 Not used
+ * a3-7 Preserved
+ */
+#define OPTEE_SMC_RPC_FUNC_CMD 5
+#define OPTEE_SMC_RETURN_RPC_CMD \
+ OPTEE_SMC_RPC_VAL(OPTEE_SMC_RPC_FUNC_CMD)
+
+/* Returned in a0 */
+#define OPTEE_SMC_RETURN_UNKNOWN_FUNCTION 0xFFFFFFFF
+
+/* Returned in a0 only from Trusted OS functions */
+#define OPTEE_SMC_RETURN_OK 0x0
+#define OPTEE_SMC_RETURN_ETHREAD_LIMIT 0x1
+#define OPTEE_SMC_RETURN_EBUSY 0x2
+#define OPTEE_SMC_RETURN_ERESUME 0x3
+#define OPTEE_SMC_RETURN_EBADADDR 0x4
+#define OPTEE_SMC_RETURN_EBADCMD 0x5
+#define OPTEE_SMC_RETURN_ENOMEM 0x6
+#define OPTEE_SMC_RETURN_ENOTAVAIL 0x7
+#define OPTEE_SMC_RETURN_IS_RPC(ret) __optee_smc_return_is_rpc((ret))
+
+static inline bool __optee_smc_return_is_rpc(u32 ret)
+{
+ return ret != OPTEE_SMC_RETURN_UNKNOWN_FUNCTION &&
+ (ret & OPTEE_SMC_RETURN_RPC_PREFIX_MASK) ==
+ OPTEE_SMC_RETURN_RPC_PREFIX;
+}
+
+#endif /* OPTEE_SMC_H */
diff --git a/drivers/tee/optee/supplicant.c b/drivers/tee/optee/supplicant.c
new file mode 100644
index 000000000000..6965055bd1b5
--- /dev/null
+++ b/drivers/tee/optee/supplicant.c
@@ -0,0 +1,89 @@
+// SPDX-License-Identifier: BSD-2-Clause
+/*
+ * Copyright (c) 2018, Linaro Limited
+ */
+
+#include <common.h>
+#include <linux/types.h>
+#include <log.h>
+#include <tee.h>
+
+#include "optee_msg.h"
+#include "optee_msg_supplicant.h"
+#include "optee_private.h"
+#include "optee_smc.h"
+
+static void cmd_shm_alloc(struct udevice *dev, struct optee_msg_arg *arg,
+ void **page_list)
+{
+ struct tee_shm *shm;
+ void *pl;
+ u64 ph_ptr;
+
+ arg->ret_origin = TEE_ORIGIN_COMMS;
+
+ if (arg->num_params != 1 ||
+ arg->params[0].attr != OPTEE_MSG_ATTR_TYPE_VALUE_INPUT) {
+ arg->ret = TEE_ERROR_BAD_PARAMETERS;
+ return;
+ }
+
+ shm = __tee_shm_add(dev, 0, NULL, arg->params[0].u.value.b,
+ TEE_SHM_REGISTER | TEE_SHM_ALLOC);
+ if (!shm) {
+ arg->ret = TEE_ERROR_OUT_OF_MEMORY;
+ return;
+ }
+
+ pl = optee_alloc_and_init_page_list(shm->addr, shm->size, &ph_ptr);
+ if (!pl) {
+ arg->ret = TEE_ERROR_OUT_OF_MEMORY;
+ tee_shm_free(shm);
+ return;
+ }
+
+ *page_list = pl;
+ arg->params[0].attr = OPTEE_MSG_ATTR_TYPE_TMEM_OUTPUT |
+ OPTEE_MSG_ATTR_NONCONTIG;
+ arg->params[0].u.tmem.buf_ptr = ph_ptr;
+ arg->params[0].u.tmem.size = shm->size;
+ arg->params[0].u.tmem.shm_ref = (ulong)shm;
+ arg->ret = TEE_SUCCESS;
+}
+
+static void cmd_shm_free(struct optee_msg_arg *arg)
+{
+ arg->ret_origin = TEE_ORIGIN_COMMS;
+
+ if (arg->num_params != 1 ||
+ arg->params[0].attr != OPTEE_MSG_ATTR_TYPE_VALUE_INPUT) {
+ arg->ret = TEE_ERROR_BAD_PARAMETERS;
+ return;
+ }
+
+ tee_shm_free((struct tee_shm *)(ulong)arg->params[0].u.value.b);
+ arg->ret = TEE_SUCCESS;
+}
+
+void optee_suppl_cmd(struct udevice *dev, struct tee_shm *shm_arg,
+ void **page_list)
+{
+ struct optee_msg_arg *arg = shm_arg->addr;
+
+ switch (arg->cmd) {
+ case OPTEE_MSG_RPC_CMD_SHM_ALLOC:
+ cmd_shm_alloc(dev, arg, page_list);
+ break;
+ case OPTEE_MSG_RPC_CMD_SHM_FREE:
+ cmd_shm_free(arg);
+ break;
+ case OPTEE_MSG_RPC_CMD_FS:
+ debug("OPTEE_MSG_RPC_CMD_FS not implemented\n");
+ arg->ret = TEE_ERROR_NOT_IMPLEMENTED;
+ break;
+ default:
+ arg->ret = TEE_ERROR_NOT_IMPLEMENTED;
+ }
+
+ arg->ret_origin = TEE_ORIGIN_COMMS;
+}
--
2.17.1
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