1 files changed, 275 insertions, 265 deletions

diff --git a/drivers/tee/optee/rpc.c b/drivers/tee/optee/rpc.c
index b45c73dd37a5..ebbbd42b0e3e 100644
--- a/drivers/tee/optee/rpc.c
+++ b/drivers/tee/optee/rpc.c
@@ -1,42 +1,17 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
- * Copyright (c) 2015-2016, Linaro Limited
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
+ * Copyright (c) 2015-2021, Linaro Limited
  */
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
 #include <linux/delay.h>
-#include <linux/device.h>
+#include <linux/i2c.h>
+#include <linux/rpmb.h>
 #include <linux/slab.h>
-#include <linux/tee_drv.h>
+#include <linux/tee_core.h>
 #include "optee_private.h"
-#include "optee_smc.h"
-
-struct wq_entry {
-	struct list_head link;
-	struct completion c;
-	u32 key;
-};
-
-void optee_wait_queue_init(struct optee_wait_queue *priv)
-{
-	mutex_init(&priv->mu);
-	INIT_LIST_HEAD(&priv->db);
-}
-
-void optee_wait_queue_exit(struct optee_wait_queue *priv)
-{
-	mutex_destroy(&priv->mu);
-}
+#include "optee_rpc_cmd.h"
 
 static void handle_rpc_func_cmd_get_time(struct optee_msg_arg *arg)
 {
@@ -58,51 +33,106 @@ bad:
 	arg->ret = TEEC_ERROR_BAD_PARAMETERS;
 }
 
-static struct wq_entry *wq_entry_get(struct optee_wait_queue *wq, u32 key)
+#if IS_REACHABLE(CONFIG_I2C)
+static void handle_rpc_func_cmd_i2c_transfer(struct tee_context *ctx,
+					     struct optee_msg_arg *arg)
 {
-	struct wq_entry *w;
+	struct optee *optee = tee_get_drvdata(ctx->teedev);
+	struct tee_param *params;
+	struct i2c_adapter *adapter;
+	struct i2c_msg msg = { };
+	size_t i;
+	int ret = -EOPNOTSUPP;
+	u8 attr[] = {
+		TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT,
+		TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT,
+		TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT,
+		TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT,
+	};
+
+	if (arg->num_params != ARRAY_SIZE(attr)) {
+		arg->ret = TEEC_ERROR_BAD_PARAMETERS;
+		return;
+	}
 
-	mutex_lock(&wq->mu);
+	params = kmalloc_array(arg->num_params, sizeof(struct tee_param),
+			       GFP_KERNEL);
+	if (!params) {
+		arg->ret = TEEC_ERROR_OUT_OF_MEMORY;
+		return;
+	}
 
-	list_for_each_entry(w, &wq->db, link)
-		if (w->key == key)
-			goto out;
+	if (optee->ops->from_msg_param(optee, params, arg->num_params,
+				       arg->params))
+		goto bad;
 
-	w = kmalloc(sizeof(*w), GFP_KERNEL);
-	if (w) {
-		init_completion(&w->c);
-		w->key = key;
-		list_add_tail(&w->link, &wq->db);
+	for (i = 0; i < arg->num_params; i++) {
+		if (params[i].attr != attr[i])
+			goto bad;
 	}
-out:
-	mutex_unlock(&wq->mu);
-	return w;
-}
 
-static void wq_sleep(struct optee_wait_queue *wq, u32 key)
-{
-	struct wq_entry *w = wq_entry_get(wq, key);
-
-	if (w) {
-		wait_for_completion(&w->c);
-		mutex_lock(&wq->mu);
-		list_del(&w->link);
-		mutex_unlock(&wq->mu);
-		kfree(w);
+	adapter = i2c_get_adapter(params[0].u.value.b);
+	if (!adapter)
+		goto bad;
+
+	if (params[1].u.value.a & OPTEE_RPC_I2C_FLAGS_TEN_BIT) {
+		if (!i2c_check_functionality(adapter,
+					     I2C_FUNC_10BIT_ADDR)) {
+			i2c_put_adapter(adapter);
+			goto bad;
+		}
+
+		msg.flags = I2C_M_TEN;
 	}
-}
 
-static void wq_wakeup(struct optee_wait_queue *wq, u32 key)
-{
-	struct wq_entry *w = wq_entry_get(wq, key);
+	msg.addr = params[0].u.value.c;
+	msg.buf  = params[2].u.memref.shm->kaddr;
+	msg.len  = params[2].u.memref.size;
+
+	switch (params[0].u.value.a) {
+	case OPTEE_RPC_I2C_TRANSFER_RD:
+		msg.flags |= I2C_M_RD;
+		break;
+	case OPTEE_RPC_I2C_TRANSFER_WR:
+		break;
+	default:
+		i2c_put_adapter(adapter);
+		goto bad;
+	}
+
+	ret = i2c_transfer(adapter, &msg, 1);
+
+	if (ret < 0) {
+		arg->ret = TEEC_ERROR_COMMUNICATION;
+	} else {
+		params[3].u.value.a = msg.len;
+		if (optee->ops->to_msg_param(optee, arg->params,
+					     arg->num_params, params))
+			arg->ret = TEEC_ERROR_BAD_PARAMETERS;
+		else
+			arg->ret = TEEC_SUCCESS;
+	}
 
-	if (w)
-		complete(&w->c);
+	i2c_put_adapter(adapter);
+	kfree(params);
+	return;
+bad:
+	kfree(params);
+	arg->ret = TEEC_ERROR_BAD_PARAMETERS;
 }
+#else
+static void handle_rpc_func_cmd_i2c_transfer(struct tee_context *ctx,
+					     struct optee_msg_arg *arg)
+{
+	arg->ret = TEEC_ERROR_NOT_SUPPORTED;
+}
+#endif
 
 static void handle_rpc_func_cmd_wq(struct optee *optee,
 				   struct optee_msg_arg *arg)
 {
+	int rc = 0;
+
 	if (arg->num_params != 1)
 		goto bad;
 
@@ -111,11 +141,14 @@ static void handle_rpc_func_cmd_wq(struct optee *optee,
 		goto bad;
 
 	switch (arg->params[0].u.value.a) {
-	case OPTEE_MSG_RPC_WAIT_QUEUE_SLEEP:
-		wq_sleep(&optee->wait_queue, arg->params[0].u.value.b);
+	case OPTEE_RPC_NOTIFICATION_WAIT:
+		rc = optee_notif_wait(optee, arg->params[0].u.value.b, arg->params[0].u.value.c);
+		if (rc)
+			goto bad;
 		break;
-	case OPTEE_MSG_RPC_WAIT_QUEUE_WAKEUP:
-		wq_wakeup(&optee->wait_queue, arg->params[0].u.value.b);
+	case OPTEE_RPC_NOTIFICATION_SEND:
+		if (optee_notif_send(optee, arg->params[0].u.value.b))
+			goto bad;
 		break;
 	default:
 		goto bad;
@@ -124,7 +157,10 @@ static void handle_rpc_func_cmd_wq(struct optee *optee,
 	arg->ret = TEEC_SUCCESS;
 	return;
 bad:
-	arg->ret = TEEC_ERROR_BAD_PARAMETERS;
+	if (rc == -ETIMEDOUT)
+		arg->ret = TEE_ERROR_TIMEOUT;
+	else
+		arg->ret = TEEC_ERROR_BAD_PARAMETERS;
 }
 
 static void handle_rpc_func_cmd_wait(struct optee_msg_arg *arg)
@@ -149,7 +185,7 @@ bad:
 	arg->ret = TEEC_ERROR_BAD_PARAMETERS;
 }
 
-static void handle_rpc_supp_cmd(struct tee_context *ctx,
+static void handle_rpc_supp_cmd(struct tee_context *ctx, struct optee *optee,
 				struct optee_msg_arg *arg)
 {
 	struct tee_param *params;
@@ -163,20 +199,22 @@ static void handle_rpc_supp_cmd(struct tee_context *ctx,
 		return;
 	}
 
-	if (optee_from_msg_param(params, arg->num_params, arg->params)) {
+	if (optee->ops->from_msg_param(optee, params, arg->num_params,
+				       arg->params)) {
 		arg->ret = TEEC_ERROR_BAD_PARAMETERS;
 		goto out;
 	}
 
 	arg->ret = optee_supp_thrd_req(ctx, arg->cmd, arg->num_params, params);
 
-	if (optee_to_msg_param(arg->params, arg->num_params, params))
+	if (optee->ops->to_msg_param(optee, arg->params, arg->num_params,
+				     params))
 		arg->ret = TEEC_ERROR_BAD_PARAMETERS;
 out:
 	kfree(params);
 }
 
-static struct tee_shm *cmd_alloc_suppl(struct tee_context *ctx, size_t sz)
+struct tee_shm *optee_rpc_cmd_alloc_suppl(struct tee_context *ctx, size_t sz)
 {
 	u32 ret;
 	struct tee_param param;
@@ -184,11 +222,11 @@ static struct tee_shm *cmd_alloc_suppl(struct tee_context *ctx, size_t sz)
 	struct tee_shm *shm;
 
 	param.attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT;
-	param.u.value.a = OPTEE_MSG_RPC_SHM_TYPE_APPL;
+	param.u.value.a = OPTEE_RPC_SHM_TYPE_APPL;
 	param.u.value.b = sz;
 	param.u.value.c = 0;
 
-	ret = optee_supp_thrd_req(ctx, OPTEE_MSG_RPC_CMD_SHM_ALLOC, 1, &param);
+	ret = optee_supp_thrd_req(ctx, OPTEE_RPC_CMD_SHM_ALLOC, 1, &param);
 	if (ret)
 		return ERR_PTR(-ENOMEM);
 
@@ -199,108 +237,12 @@ static struct tee_shm *cmd_alloc_suppl(struct tee_context *ctx, size_t sz)
 	return shm;
 }
 
-static void handle_rpc_func_cmd_shm_alloc(struct tee_context *ctx,
-					  struct optee_msg_arg *arg,
-					  struct optee_call_ctx *call_ctx)
-{
-	phys_addr_t pa;
-	struct tee_shm *shm;
-	size_t sz;
-	size_t n;
-
-	arg->ret_origin = TEEC_ORIGIN_COMMS;
-
-	if (!arg->num_params ||
-	    arg->params[0].attr != OPTEE_MSG_ATTR_TYPE_VALUE_INPUT) {
-		arg->ret = TEEC_ERROR_BAD_PARAMETERS;
-		return;
-	}
-
-	for (n = 1; n < arg->num_params; n++) {
-		if (arg->params[n].attr != OPTEE_MSG_ATTR_TYPE_NONE) {
-			arg->ret = TEEC_ERROR_BAD_PARAMETERS;
-			return;
-		}
-	}
-
-	sz = arg->params[0].u.value.b;
-	switch (arg->params[0].u.value.a) {
-	case OPTEE_MSG_RPC_SHM_TYPE_APPL:
-		shm = cmd_alloc_suppl(ctx, sz);
-		break;
-	case OPTEE_MSG_RPC_SHM_TYPE_KERNEL:
-		shm = tee_shm_alloc(ctx, sz, TEE_SHM_MAPPED);
-		break;
-	default:
-		arg->ret = TEEC_ERROR_BAD_PARAMETERS;
-		return;
-	}
-
-	if (IS_ERR(shm)) {
-		arg->ret = TEEC_ERROR_OUT_OF_MEMORY;
-		return;
-	}
-
-	if (tee_shm_get_pa(shm, 0, &pa)) {
-		arg->ret = TEEC_ERROR_BAD_PARAMETERS;
-		goto bad;
-	}
-
-	sz = tee_shm_get_size(shm);
-
-	if (tee_shm_is_registered(shm)) {
-		struct page **pages;
-		u64 *pages_list;
-		size_t page_num;
-
-		pages = tee_shm_get_pages(shm, &page_num);
-		if (!pages || !page_num) {
-			arg->ret = TEEC_ERROR_OUT_OF_MEMORY;
-			goto bad;
-		}
-
-		pages_list = optee_allocate_pages_list(page_num);
-		if (!pages_list) {
-			arg->ret = TEEC_ERROR_OUT_OF_MEMORY;
-			goto bad;
-		}
-
-		call_ctx->pages_list = pages_list;
-		call_ctx->num_entries = page_num;
-
-		arg->params[0].attr = OPTEE_MSG_ATTR_TYPE_TMEM_OUTPUT |
-				      OPTEE_MSG_ATTR_NONCONTIG;
-		/*
-		 * In the least bits of u.tmem.buf_ptr we store buffer offset
-		 * from 4k page, as described in OP-TEE ABI.
-		 */
-		arg->params[0].u.tmem.buf_ptr = virt_to_phys(pages_list) |
-			(tee_shm_get_page_offset(shm) &
-			 (OPTEE_MSG_NONCONTIG_PAGE_SIZE - 1));
-		arg->params[0].u.tmem.size = tee_shm_get_size(shm);
-		arg->params[0].u.tmem.shm_ref = (unsigned long)shm;
-
-		optee_fill_pages_list(pages_list, pages, page_num,
-				      tee_shm_get_page_offset(shm));
-	} else {
-		arg->params[0].attr = OPTEE_MSG_ATTR_TYPE_TMEM_OUTPUT;
-		arg->params[0].u.tmem.buf_ptr = pa;
-		arg->params[0].u.tmem.size = sz;
-		arg->params[0].u.tmem.shm_ref = (unsigned long)shm;
-	}
-
-	arg->ret = TEEC_SUCCESS;
-	return;
-bad:
-	tee_shm_free(shm);
-}
-
-static void cmd_free_suppl(struct tee_context *ctx, struct tee_shm *shm)
+void optee_rpc_cmd_free_suppl(struct tee_context *ctx, struct tee_shm *shm)
 {
 	struct tee_param param;
 
 	param.attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT;
-	param.u.value.a = OPTEE_MSG_RPC_SHM_TYPE_APPL;
+	param.u.value.a = OPTEE_RPC_SHM_TYPE_APPL;
 	param.u.value.b = tee_shm_get_id(shm);
 	param.u.value.c = 0;
 
@@ -317,136 +259,204 @@ static void cmd_free_suppl(struct tee_context *ctx, struct tee_shm *shm)
 	 */
 	tee_shm_put(shm);
 
-	optee_supp_thrd_req(ctx, OPTEE_MSG_RPC_CMD_SHM_FREE, 1, &param);
+	optee_supp_thrd_req(ctx, OPTEE_RPC_CMD_SHM_FREE, 1, &param);
 }
 
-static void handle_rpc_func_cmd_shm_free(struct tee_context *ctx,
-					 struct optee_msg_arg *arg)
+static void handle_rpc_func_rpmb_probe_reset(struct tee_context *ctx,
+					     struct optee *optee,
+					     struct optee_msg_arg *arg)
 {
-	struct tee_shm *shm;
+	struct tee_param params[1];
 
-	arg->ret_origin = TEEC_ORIGIN_COMMS;
-
-	if (arg->num_params != 1 ||
-	    arg->params[0].attr != OPTEE_MSG_ATTR_TYPE_VALUE_INPUT) {
+	if (arg->num_params != ARRAY_SIZE(params) ||
+	    optee->ops->from_msg_param(optee, params, arg->num_params,
+				       arg->params) ||
+	    params[0].attr != TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT) {
 		arg->ret = TEEC_ERROR_BAD_PARAMETERS;
 		return;
 	}
 
-	shm = (struct tee_shm *)(unsigned long)arg->params[0].u.value.b;
-	switch (arg->params[0].u.value.a) {
-	case OPTEE_MSG_RPC_SHM_TYPE_APPL:
-		cmd_free_suppl(ctx, shm);
-		break;
-	case OPTEE_MSG_RPC_SHM_TYPE_KERNEL:
-		tee_shm_free(shm);
-		break;
-	default:
+	params[0].u.value.a = OPTEE_RPC_SHM_TYPE_KERNEL;
+	params[0].u.value.b = 0;
+	params[0].u.value.c = 0;
+	if (optee->ops->to_msg_param(optee, arg->params,
+				     arg->num_params, params)) {
 		arg->ret = TEEC_ERROR_BAD_PARAMETERS;
+		return;
 	}
+
+	mutex_lock(&optee->rpmb_dev_mutex);
+	rpmb_dev_put(optee->rpmb_dev);
+	optee->rpmb_dev = NULL;
+	mutex_unlock(&optee->rpmb_dev_mutex);
+
 	arg->ret = TEEC_SUCCESS;
 }
 
-static void free_pages_list(struct optee_call_ctx *call_ctx)
+static int rpmb_type_to_rpc_type(enum rpmb_type rtype)
 {
-	if (call_ctx->pages_list) {
-		optee_free_pages_list(call_ctx->pages_list,
-				      call_ctx->num_entries);
-		call_ctx->pages_list = NULL;
-		call_ctx->num_entries = 0;
+	switch (rtype) {
+	case RPMB_TYPE_EMMC:
+		return OPTEE_RPC_RPMB_EMMC;
+	case RPMB_TYPE_UFS:
+		return OPTEE_RPC_RPMB_UFS;
+	case RPMB_TYPE_NVME:
+		return OPTEE_RPC_RPMB_NVME;
+	default:
+		return -1;
 	}
 }
 
-void optee_rpc_finalize_call(struct optee_call_ctx *call_ctx)
+static int rpc_rpmb_match(struct device *dev, const void *data)
 {
-	free_pages_list(call_ctx);
+	struct rpmb_dev *rdev = to_rpmb_dev(dev);
+
+	return rpmb_type_to_rpc_type(rdev->descr.type) >= 0;
 }
 
-static void handle_rpc_func_cmd(struct tee_context *ctx, struct optee *optee,
-				struct tee_shm *shm,
-				struct optee_call_ctx *call_ctx)
+static void handle_rpc_func_rpmb_probe_next(struct tee_context *ctx,
+					    struct optee *optee,
+					    struct optee_msg_arg *arg)
 {
-	struct optee_msg_arg *arg;
+	struct rpmb_dev *rdev;
+	struct tee_param params[2];
+	void *buf;
+
+	if (arg->num_params != ARRAY_SIZE(params) ||
+	    optee->ops->from_msg_param(optee, params, arg->num_params,
+				       arg->params) ||
+	    params[0].attr != TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT ||
+	    params[1].attr != TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT) {
+		arg->ret = TEEC_ERROR_BAD_PARAMETERS;
+		return;
+	}
+	buf = tee_shm_get_va(params[1].u.memref.shm,
+			     params[1].u.memref.shm_offs);
+	if (IS_ERR(buf)) {
+		arg->ret = TEEC_ERROR_BAD_PARAMETERS;
+		return;
+	}
+
+	mutex_lock(&optee->rpmb_dev_mutex);
+	rdev = rpmb_dev_find_device(NULL, optee->rpmb_dev, rpc_rpmb_match);
+	rpmb_dev_put(optee->rpmb_dev);
+	optee->rpmb_dev = rdev;
+	mutex_unlock(&optee->rpmb_dev_mutex);
 
-	arg = tee_shm_get_va(shm, 0);
-	if (IS_ERR(arg)) {
-		pr_err("%s: tee_shm_get_va %p failed\n", __func__, shm);
+	if (!rdev) {
+		arg->ret = TEEC_ERROR_ITEM_NOT_FOUND;
 		return;
 	}
 
+	if (params[1].u.memref.size < rdev->descr.dev_id_len) {
+		arg->ret = TEEC_ERROR_SHORT_BUFFER;
+		return;
+	}
+	memcpy(buf, rdev->descr.dev_id, rdev->descr.dev_id_len);
+	params[1].u.memref.size = rdev->descr.dev_id_len;
+	params[0].u.value.a = rpmb_type_to_rpc_type(rdev->descr.type);
+	params[0].u.value.b = rdev->descr.capacity;
+	params[0].u.value.c = rdev->descr.reliable_wr_count;
+	if (optee->ops->to_msg_param(optee, arg->params,
+				     arg->num_params, params)) {
+		arg->ret = TEEC_ERROR_BAD_PARAMETERS;
+		return;
+	}
+
+	arg->ret = TEEC_SUCCESS;
+}
+
+static void handle_rpc_func_rpmb_frames(struct tee_context *ctx,
+					struct optee *optee,
+					struct optee_msg_arg *arg)
+{
+	struct tee_param params[2];
+	struct rpmb_dev *rdev;
+	void *p0, *p1;
+
+	mutex_lock(&optee->rpmb_dev_mutex);
+	rdev = rpmb_dev_get(optee->rpmb_dev);
+	mutex_unlock(&optee->rpmb_dev_mutex);
+	if (!rdev) {
+		arg->ret = TEEC_ERROR_ITEM_NOT_FOUND;
+		return;
+	}
+
+	if (arg->num_params != ARRAY_SIZE(params) ||
+	    optee->ops->from_msg_param(optee, params, arg->num_params,
+				       arg->params) ||
+	    params[0].attr != TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT ||
+	    params[1].attr != TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT) {
+		arg->ret = TEEC_ERROR_BAD_PARAMETERS;
+		goto out;
+	}
+
+	p0 = tee_shm_get_va(params[0].u.memref.shm,
+			    params[0].u.memref.shm_offs);
+	p1 = tee_shm_get_va(params[1].u.memref.shm,
+			    params[1].u.memref.shm_offs);
+	if (rpmb_route_frames(rdev, p0, params[0].u.memref.size, p1,
+			      params[1].u.memref.size)) {
+		arg->ret = TEEC_ERROR_BAD_PARAMETERS;
+		goto out;
+	}
+	if (optee->ops->to_msg_param(optee, arg->params,
+				     arg->num_params, params)) {
+		arg->ret = TEEC_ERROR_BAD_PARAMETERS;
+		goto out;
+	}
+	arg->ret = TEEC_SUCCESS;
+out:
+	rpmb_dev_put(rdev);
+}
+
+void optee_rpc_cmd(struct tee_context *ctx, struct optee *optee,
+		   struct optee_msg_arg *arg)
+{
 	switch (arg->cmd) {
-	case OPTEE_MSG_RPC_CMD_GET_TIME:
+	case OPTEE_RPC_CMD_GET_TIME:
 		handle_rpc_func_cmd_get_time(arg);
 		break;
-	case OPTEE_MSG_RPC_CMD_WAIT_QUEUE:
+	case OPTEE_RPC_CMD_NOTIFICATION:
 		handle_rpc_func_cmd_wq(optee, arg);
 		break;
-	case OPTEE_MSG_RPC_CMD_SUSPEND:
+	case OPTEE_RPC_CMD_SUSPEND:
 		handle_rpc_func_cmd_wait(arg);
 		break;
-	case OPTEE_MSG_RPC_CMD_SHM_ALLOC:
-		free_pages_list(call_ctx);
-		handle_rpc_func_cmd_shm_alloc(ctx, arg, call_ctx);
-		break;
-	case OPTEE_MSG_RPC_CMD_SHM_FREE:
-		handle_rpc_func_cmd_shm_free(ctx, arg);
-		break;
-	default:
-		handle_rpc_supp_cmd(ctx, arg);
-	}
-}
-
-/**
- * optee_handle_rpc() - handle RPC from secure world
- * @ctx:	context doing the RPC
- * @param:	value of registers for the RPC
- * @call_ctx:	call context. Preserved during one OP-TEE invocation
- *
- * Result of RPC is written back into @param.
- */
-void optee_handle_rpc(struct tee_context *ctx, struct optee_rpc_param *param,
-		      struct optee_call_ctx *call_ctx)
-{
-	struct tee_device *teedev = ctx->teedev;
-	struct optee *optee = tee_get_drvdata(teedev);
-	struct tee_shm *shm;
-	phys_addr_t pa;
-
-	switch (OPTEE_SMC_RETURN_GET_RPC_FUNC(param->a0)) {
-	case OPTEE_SMC_RPC_FUNC_ALLOC:
-		shm = tee_shm_alloc(ctx, param->a1, TEE_SHM_MAPPED);
-		if (!IS_ERR(shm) && !tee_shm_get_pa(shm, 0, &pa)) {
-			reg_pair_from_64(&param->a1, &param->a2, pa);
-			reg_pair_from_64(&param->a4, &param->a5,
-					 (unsigned long)shm);
-		} else {
-			param->a1 = 0;
-			param->a2 = 0;
-			param->a4 = 0;
-			param->a5 = 0;
-		}
+	case OPTEE_RPC_CMD_I2C_TRANSFER:
+		handle_rpc_func_cmd_i2c_transfer(ctx, arg);
 		break;
-	case OPTEE_SMC_RPC_FUNC_FREE:
-		shm = reg_pair_to_ptr(param->a1, param->a2);
-		tee_shm_free(shm);
+	/*
+	 * optee->in_kernel_rpmb_routing true means that OP-TEE supports
+	 * in-kernel RPMB routing _and_ that the RPMB subsystem is
+	 * reachable. This is reported to user space with
+	 * rpmb_routing_model=kernel in sysfs.
+	 *
+	 * rpmb_routing_model=kernel is also a promise to user space that
+	 * RPMB access will not require supplicant support, hence the
+	 * checks below.
+	 */
+	case OPTEE_RPC_CMD_RPMB_PROBE_RESET:
+		if (optee->in_kernel_rpmb_routing)
+			handle_rpc_func_rpmb_probe_reset(ctx, optee, arg);
+		else
+			handle_rpc_supp_cmd(ctx, optee, arg);
 		break;
-	case OPTEE_SMC_RPC_FUNC_FOREIGN_INTR:
-		/*
-		 * A foreign interrupt was raised while secure world was
-		 * executing, since they are handled in Linux a dummy RPC is
-		 * performed to let Linux take the interrupt through the normal
-		 * vector.
-		 */
+	case OPTEE_RPC_CMD_RPMB_PROBE_NEXT:
+		if (optee->in_kernel_rpmb_routing)
+			handle_rpc_func_rpmb_probe_next(ctx, optee, arg);
+		else
+			handle_rpc_supp_cmd(ctx, optee, arg);
 		break;
-	case OPTEE_SMC_RPC_FUNC_CMD:
-		shm = reg_pair_to_ptr(param->a1, param->a2);
-		handle_rpc_func_cmd(ctx, optee, shm, call_ctx);
+	case OPTEE_RPC_CMD_RPMB_FRAMES:
+		if (optee->in_kernel_rpmb_routing)
+			handle_rpc_func_rpmb_frames(ctx, optee, arg);
+		else
+			handle_rpc_supp_cmd(ctx, optee, arg);
 		break;
 	default:
-		pr_warn("Unknown RPC func 0x%x\n",
-			(u32)OPTEE_SMC_RETURN_GET_RPC_FUNC(param->a0));
-		break;
+		handle_rpc_supp_cmd(ctx, optee, arg);
 	}
-
-	param->a0 = OPTEE_SMC_CALL_RETURN_FROM_RPC;
 }
+
+