mirror of https://github.com/OpenIPC/firmware.git
506 lines
12 KiB
Diff
506 lines
12 KiB
Diff
diff -drupN a/drivers/tee/optee/rpc.c b/drivers/tee/optee/rpc.c
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--- a/drivers/tee/optee/rpc.c 1970-01-01 03:00:00.000000000 +0300
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+++ b/drivers/tee/optee/rpc.c 2022-06-12 05:28:14.000000000 +0300
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@@ -0,0 +1,501 @@
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+/*
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+ * Copyright (c) 2015-2016, Linaro Limited
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+ *
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+ * This software is licensed under the terms of the GNU General Public
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+ * License version 2, as published by the Free Software Foundation, and
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+ * may be copied, distributed, and modified under those terms.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ */
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+
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+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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+
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+#include <linux/delay.h>
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+#include <linux/device.h>
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+#include <linux/io.h>
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+#include <linux/slab.h>
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+#include <linux/tee_drv.h>
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+#include "optee_bench.h"
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+#include "optee_private.h"
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+#include "optee_smc.h"
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+
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+struct wq_entry {
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+ struct list_head link;
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+ struct completion c;
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+ u32 key;
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+};
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+
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+void optee_wait_queue_init(struct optee_wait_queue *priv)
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+{
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+ mutex_init(&priv->mu);
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+ INIT_LIST_HEAD(&priv->db);
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+}
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+
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+void optee_wait_queue_exit(struct optee_wait_queue *priv)
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+{
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+ mutex_destroy(&priv->mu);
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+}
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+
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+static void handle_rpc_func_cmd_get_time(struct optee_msg_arg *arg)
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+{
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+ struct timespec64 ts;
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+
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+ if (arg->num_params != 1)
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+ goto bad;
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+ if ((arg->params[0].attr & OPTEE_MSG_ATTR_TYPE_MASK) !=
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+ OPTEE_MSG_ATTR_TYPE_VALUE_OUTPUT)
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+ goto bad;
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+
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+ getnstimeofday64(&ts);
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+ arg->params[0].u.value.a = ts.tv_sec;
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+ arg->params[0].u.value.b = ts.tv_nsec;
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+
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+ arg->ret = TEEC_SUCCESS;
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+ return;
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+bad:
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+ arg->ret = TEEC_ERROR_BAD_PARAMETERS;
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+}
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+
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+static struct wq_entry *wq_entry_get(struct optee_wait_queue *wq, u32 key)
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+{
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+ struct wq_entry *w;
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+
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+ mutex_lock(&wq->mu);
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+
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+ list_for_each_entry(w, &wq->db, link)
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+ if (w->key == key)
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+ goto out;
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+
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+ w = kmalloc(sizeof(*w), GFP_KERNEL);
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+ if (w) {
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+ init_completion(&w->c);
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+ w->key = key;
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+ list_add_tail(&w->link, &wq->db);
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+ }
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+out:
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+ mutex_unlock(&wq->mu);
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+ return w;
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+}
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+
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+static void wq_sleep(struct optee_wait_queue *wq, u32 key)
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+{
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+ struct wq_entry *w = wq_entry_get(wq, key);
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+
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+ if (w) {
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+ wait_for_completion(&w->c);
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+ mutex_lock(&wq->mu);
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+ list_del(&w->link);
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+ mutex_unlock(&wq->mu);
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+ kfree(w);
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+ }
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+}
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+
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+static void wq_wakeup(struct optee_wait_queue *wq, u32 key)
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+{
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+ struct wq_entry *w = wq_entry_get(wq, key);
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+
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+ if (w)
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+ complete(&w->c);
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+}
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+
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+static void handle_rpc_func_cmd_wq(struct optee *optee,
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+ struct optee_msg_arg *arg)
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+{
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+ if (arg->num_params != 1)
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+ goto bad;
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+
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+ if ((arg->params[0].attr & OPTEE_MSG_ATTR_TYPE_MASK) !=
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+ OPTEE_MSG_ATTR_TYPE_VALUE_INPUT)
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+ goto bad;
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+
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+ switch (arg->params[0].u.value.a) {
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+ case OPTEE_MSG_RPC_WAIT_QUEUE_SLEEP:
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+ wq_sleep(&optee->wait_queue, arg->params[0].u.value.b);
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+ break;
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+ case OPTEE_MSG_RPC_WAIT_QUEUE_WAKEUP:
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+ wq_wakeup(&optee->wait_queue, arg->params[0].u.value.b);
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+ break;
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+ default:
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+ goto bad;
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+ }
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+
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+ arg->ret = TEEC_SUCCESS;
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+ return;
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+bad:
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+ arg->ret = TEEC_ERROR_BAD_PARAMETERS;
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+}
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+
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+static void handle_rpc_func_cmd_wait(struct optee_msg_arg *arg)
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+{
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+ u32 msec_to_wait;
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+
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+ if (arg->num_params != 1)
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+ goto bad;
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+
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+ if ((arg->params[0].attr & OPTEE_MSG_ATTR_TYPE_MASK) !=
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+ OPTEE_MSG_ATTR_TYPE_VALUE_INPUT)
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+ goto bad;
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+
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+ msec_to_wait = arg->params[0].u.value.a;
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+
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+ /* Go to interruptible sleep */
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+ msleep_interruptible(msec_to_wait);
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+
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+ arg->ret = TEEC_SUCCESS;
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+ return;
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+bad:
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+ arg->ret = TEEC_ERROR_BAD_PARAMETERS;
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+}
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+
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+static void handle_rpc_supp_cmd(struct tee_context *ctx,
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+ struct optee_msg_arg *arg)
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+{
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+ struct tee_param *params;
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+
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+ arg->ret_origin = TEEC_ORIGIN_COMMS;
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+
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+ params = kmalloc_array(arg->num_params, sizeof(struct tee_param),
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+ GFP_KERNEL);
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+ if (!params) {
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+ arg->ret = TEEC_ERROR_OUT_OF_MEMORY;
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+ return;
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+ }
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+
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+ if (optee_from_msg_param(params, arg->num_params, arg->params)) {
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+ arg->ret = TEEC_ERROR_BAD_PARAMETERS;
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+ goto out;
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+ }
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+
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+ arg->ret = optee_supp_thrd_req(ctx, arg->cmd, arg->num_params, params);
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+
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+ if (optee_to_msg_param(arg->params, arg->num_params, params))
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+ arg->ret = TEEC_ERROR_BAD_PARAMETERS;
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+out:
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+ kfree(params);
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+}
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+
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+static struct tee_shm *cmd_alloc_suppl(struct tee_context *ctx, size_t sz)
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+{
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+ u32 ret;
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+ struct tee_param param;
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+ struct optee *optee = tee_get_drvdata(ctx->teedev);
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+ struct tee_shm *shm;
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+
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+ param.attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT;
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+ param.u.value.a = OPTEE_MSG_RPC_SHM_TYPE_APPL;
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+ param.u.value.b = sz;
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+ param.u.value.c = 0;
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+
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+ ret = optee_supp_thrd_req(ctx, OPTEE_MSG_RPC_CMD_SHM_ALLOC, 1, ¶m);
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+ if (ret)
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+ return ERR_PTR(-ENOMEM);
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+
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+ mutex_lock(&optee->supp.mutex);
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+ /* Increases count as secure world doesn't have a reference */
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+ shm = tee_shm_get_from_id(optee->supp.ctx, param.u.value.c);
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+ mutex_unlock(&optee->supp.mutex);
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+ return shm;
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+}
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+
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+static void handle_rpc_func_cmd_shm_alloc(struct tee_context *ctx,
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+ struct optee_msg_arg *arg,
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+ struct optee_call_ctx *call_ctx)
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+{
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+ phys_addr_t pa;
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+ struct tee_shm *shm;
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+ size_t sz;
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+ size_t n;
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+
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+ arg->ret_origin = TEEC_ORIGIN_COMMS;
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+
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+ if (!arg->num_params ||
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+ arg->params[0].attr != OPTEE_MSG_ATTR_TYPE_VALUE_INPUT) {
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+ arg->ret = TEEC_ERROR_BAD_PARAMETERS;
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+ return;
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+ }
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+
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+ for (n = 1; n < arg->num_params; n++) {
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+ if (arg->params[n].attr != OPTEE_MSG_ATTR_TYPE_NONE) {
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+ arg->ret = TEEC_ERROR_BAD_PARAMETERS;
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+ return;
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+ }
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+ }
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+
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+ sz = arg->params[0].u.value.b;
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+ switch (arg->params[0].u.value.a) {
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+ case OPTEE_MSG_RPC_SHM_TYPE_APPL:
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+ shm = cmd_alloc_suppl(ctx, sz);
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+ break;
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+ case OPTEE_MSG_RPC_SHM_TYPE_KERNEL:
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+ shm = tee_shm_alloc(ctx, sz, TEE_SHM_MAPPED);
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+ break;
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+ default:
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+ arg->ret = TEEC_ERROR_BAD_PARAMETERS;
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+ return;
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+ }
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+
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+ if (IS_ERR(shm)) {
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+ arg->ret = TEEC_ERROR_OUT_OF_MEMORY;
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+ return;
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+ }
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+
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+ if (tee_shm_get_pa(shm, 0, &pa)) {
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+ arg->ret = TEEC_ERROR_BAD_PARAMETERS;
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+ goto bad;
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+ }
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+
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+ sz = tee_shm_get_size(shm);
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+
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+ if (tee_shm_is_registered(shm)) {
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+ struct page **pages;
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+ u64 *pages_list;
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+ size_t page_num;
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+
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+ pages = tee_shm_get_pages(shm, &page_num);
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+ if (!pages || !page_num) {
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+ arg->ret = TEEC_ERROR_OUT_OF_MEMORY;
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+ goto bad;
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+ }
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+
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+ pages_list = optee_allocate_pages_list(page_num);
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+ if (!pages_list) {
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+ arg->ret = TEEC_ERROR_OUT_OF_MEMORY;
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+ goto bad;
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+ }
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+
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+ call_ctx->pages_list = pages_list;
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+ call_ctx->num_entries = page_num;
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+
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+ arg->params[0].attr = OPTEE_MSG_ATTR_TYPE_TMEM_OUTPUT |
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+ OPTEE_MSG_ATTR_NONCONTIG;
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+ /*
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+ * In the least bits of u.tmem.buf_ptr we store buffer offset
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+ * from 4k page, as described in OP-TEE ABI.
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+ */
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+ arg->params[0].u.tmem.buf_ptr = virt_to_phys(pages_list) |
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+ (tee_shm_get_page_offset(shm) &
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+ (OPTEE_MSG_NONCONTIG_PAGE_SIZE - 1));
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+ arg->params[0].u.tmem.size = tee_shm_get_size(shm);
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+ arg->params[0].u.tmem.shm_ref = (unsigned long)shm;
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+
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+ optee_fill_pages_list(pages_list, pages, page_num,
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+ tee_shm_get_page_offset(shm));
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+ } else {
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+ arg->params[0].attr = OPTEE_MSG_ATTR_TYPE_TMEM_OUTPUT;
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+ arg->params[0].u.tmem.buf_ptr = pa;
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+ arg->params[0].u.tmem.size = sz;
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+ arg->params[0].u.tmem.shm_ref = (unsigned long)shm;
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+ }
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+
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+ arg->ret = TEEC_SUCCESS;
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+ return;
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+bad:
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+ tee_shm_free(shm);
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+}
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+
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+static void cmd_free_suppl(struct tee_context *ctx, struct tee_shm *shm)
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+{
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+ struct tee_param param;
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+
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+ param.attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT;
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+ param.u.value.a = OPTEE_MSG_RPC_SHM_TYPE_APPL;
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+ param.u.value.b = tee_shm_get_id(shm);
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+ param.u.value.c = 0;
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+
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+ /*
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+ * Match the tee_shm_get_from_id() in cmd_alloc_suppl() as secure
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+ * world has released its reference.
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+ *
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+ * It's better to do this before sending the request to supplicant
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+ * as we'd like to let the process doing the initial allocation to
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+ * do release the last reference too in order to avoid stacking
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+ * many pending fput() on the client process. This could otherwise
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+ * happen if secure world does many allocate and free in a single
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+ * invoke.
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+ */
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+ tee_shm_put(shm);
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+
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+ optee_supp_thrd_req(ctx, OPTEE_MSG_RPC_CMD_SHM_FREE, 1, ¶m);
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+}
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+
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+static void handle_rpc_func_cmd_shm_free(struct tee_context *ctx,
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+ struct optee_msg_arg *arg)
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+{
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+ struct tee_shm *shm;
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+
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+ arg->ret_origin = TEEC_ORIGIN_COMMS;
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+
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+ if (arg->num_params != 1 ||
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+ arg->params[0].attr != OPTEE_MSG_ATTR_TYPE_VALUE_INPUT) {
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+ arg->ret = TEEC_ERROR_BAD_PARAMETERS;
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+ return;
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+ }
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+
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+ shm = (struct tee_shm *)(unsigned long)arg->params[0].u.value.b;
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+ switch (arg->params[0].u.value.a) {
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+ case OPTEE_MSG_RPC_SHM_TYPE_APPL:
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+ cmd_free_suppl(ctx, shm);
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+ break;
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+ case OPTEE_MSG_RPC_SHM_TYPE_KERNEL:
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+ tee_shm_free(shm);
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+ break;
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+ default:
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+ arg->ret = TEEC_ERROR_BAD_PARAMETERS;
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+ }
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+ arg->ret = TEEC_SUCCESS;
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+}
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+
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+static void handle_rpc_func_cmd_bm_reg(struct optee_msg_arg *arg)
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+{
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+ u64 size;
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+ u64 type;
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+ u64 paddr;
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+
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+ if (arg->num_params != 1)
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+ goto bad;
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+
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+ if ((arg->params[0].attr & OPTEE_MSG_ATTR_TYPE_MASK) !=
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+ OPTEE_MSG_ATTR_TYPE_VALUE_INPUT)
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+ goto bad;
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+
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+ type = arg->params[0].u.value.a;
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+ switch (type) {
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+ case OPTEE_MSG_RPC_CMD_BENCH_REG_NEW:
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+ size = arg->params[0].u.value.c;
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+ paddr = arg->params[0].u.value.b;
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+ down_write(&optee_bench_ts_rwsem);
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+ optee_bench_ts_global =
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+ memremap(paddr, size, MEMREMAP_WB);
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+ if (!optee_bench_ts_global) {
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+ up_write(&optee_bench_ts_rwsem);
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+ goto bad;
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+ }
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+ up_write(&optee_bench_ts_rwsem);
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+ break;
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+ case OPTEE_MSG_RPC_CMD_BENCH_REG_DEL:
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+ down_write(&optee_bench_ts_rwsem);
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+ if (optee_bench_ts_global)
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+ memunmap(optee_bench_ts_global);
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+ optee_bench_ts_global = NULL;
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+ up_write(&optee_bench_ts_rwsem);
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+ break;
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+ default:
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+ goto bad;
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+ }
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+
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+ arg->ret = TEEC_SUCCESS;
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+ return;
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+bad:
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+ arg->ret = TEEC_ERROR_BAD_PARAMETERS;
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+}
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+
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+static void free_pages_list(struct optee_call_ctx *call_ctx)
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+{
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+ if (call_ctx->pages_list) {
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+ optee_free_pages_list(call_ctx->pages_list,
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+ call_ctx->num_entries);
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+ call_ctx->pages_list = NULL;
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+ call_ctx->num_entries = 0;
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+ }
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+}
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+
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+void optee_rpc_finalize_call(struct optee_call_ctx *call_ctx)
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+{
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+ free_pages_list(call_ctx);
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+}
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+
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+static void handle_rpc_func_cmd(struct tee_context *ctx, struct optee *optee,
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+ struct tee_shm *shm,
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+ struct optee_call_ctx *call_ctx)
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+{
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+ struct optee_msg_arg *arg;
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+
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+ arg = tee_shm_get_va(shm, 0);
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+ if (IS_ERR(arg)) {
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+ pr_err("%s: tee_shm_get_va %p failed\n", __func__, shm);
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+ return;
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+ }
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+
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+ switch (arg->cmd) {
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+ case OPTEE_MSG_RPC_CMD_GET_TIME:
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+ handle_rpc_func_cmd_get_time(arg);
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+ break;
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+ case OPTEE_MSG_RPC_CMD_WAIT_QUEUE:
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+ handle_rpc_func_cmd_wq(optee, arg);
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+ break;
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+ case OPTEE_MSG_RPC_CMD_SUSPEND:
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+ handle_rpc_func_cmd_wait(arg);
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+ break;
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+ case OPTEE_MSG_RPC_CMD_SHM_ALLOC:
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+ free_pages_list(call_ctx);
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+ handle_rpc_func_cmd_shm_alloc(ctx, arg, call_ctx);
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+ break;
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+ case OPTEE_MSG_RPC_CMD_SHM_FREE:
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+ handle_rpc_func_cmd_shm_free(ctx, arg);
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+ break;
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+ case OPTEE_MSG_RPC_CMD_BENCH_REG:
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+ handle_rpc_func_cmd_bm_reg(arg);
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+ break;
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+ default:
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+ handle_rpc_supp_cmd(ctx, arg);
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+ }
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+}
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+
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+/**
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+ * optee_handle_rpc() - handle RPC from secure world
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+ * @ctx: context doing the RPC
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+ * @param: value of registers for the RPC
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+ * @call_ctx: call context. Preserved during one OP-TEE invocation
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+ *
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+ * Result of RPC is written back into @param.
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+ */
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+void optee_handle_rpc(struct tee_context *ctx, struct optee_rpc_param *param,
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+ struct optee_call_ctx *call_ctx)
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+{
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+ 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(¶m->a1, ¶m->a2, pa);
|
|
+ reg_pair_from_64(¶m->a4, ¶m->a5,
|
|
+ (unsigned long)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:
|
|
+ /*
|
|
+ * 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.
|
|
+ */
|
|
+ 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);
|
|
+ break;
|
|
+ default:
|
|
+ pr_warn("Unknown RPC func 0x%x\n",
|
|
+ (u32)OPTEE_SMC_RETURN_GET_RPC_FUNC(param->a0));
|
|
+ break;
|
|
+ }
|
|
+
|
|
+ param->a0 = OPTEE_SMC_CALL_RETURN_FROM_RPC;
|
|
+}
|