[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/drivers/tee/optee/call.c b/src/kernel/linux/v4.14/drivers/tee/optee/call.c
new file mode 100644
index 0000000..f7b7b40
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/tee/optee/call.c
@@ -0,0 +1,444 @@
+/*
+ * Copyright (c) 2015, 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.
+ *
+ */
+#include <linux/arm-smccc.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/tee_drv.h>
+#include <linux/types.h>
+#include <linux/uaccess.h>
+#include "optee_private.h"
+#include "optee_smc.h"
+
+struct optee_call_waiter {
+ struct list_head list_node;
+ struct completion c;
+};
+
+static void optee_cq_wait_init(struct optee_call_queue *cq,
+ struct optee_call_waiter *w)
+{
+ /*
+ * We're preparing to make a call to secure world. In case we can't
+ * allocate a thread in secure world we'll end up waiting in
+ * optee_cq_wait_for_completion().
+ *
+ * Normally if there's no contention in secure world the call will
+ * complete and we can cleanup directly with optee_cq_wait_final().
+ */
+ mutex_lock(&cq->mutex);
+
+ /*
+ * We add ourselves to the queue, but we don't wait. This
+ * guarantees that we don't lose a completion if secure world
+ * returns busy and another thread just exited and try to complete
+ * someone.
+ */
+ init_completion(&w->c);
+ list_add_tail(&w->list_node, &cq->waiters);
+
+ mutex_unlock(&cq->mutex);
+}
+
+static void optee_cq_wait_for_completion(struct optee_call_queue *cq,
+ struct optee_call_waiter *w)
+{
+ wait_for_completion(&w->c);
+
+ mutex_lock(&cq->mutex);
+
+ /* Move to end of list to get out of the way for other waiters */
+ list_del(&w->list_node);
+ reinit_completion(&w->c);
+ list_add_tail(&w->list_node, &cq->waiters);
+
+ mutex_unlock(&cq->mutex);
+}
+
+static void optee_cq_complete_one(struct optee_call_queue *cq)
+{
+ struct optee_call_waiter *w;
+
+ list_for_each_entry(w, &cq->waiters, list_node) {
+ if (!completion_done(&w->c)) {
+ complete(&w->c);
+ break;
+ }
+ }
+}
+
+static void optee_cq_wait_final(struct optee_call_queue *cq,
+ struct optee_call_waiter *w)
+{
+ /*
+ * We're done with the call to secure world. The thread in secure
+ * world that was used for this call is now available for some
+ * other task to use.
+ */
+ mutex_lock(&cq->mutex);
+
+ /* Get out of the list */
+ list_del(&w->list_node);
+
+ /* Wake up one eventual waiting task */
+ optee_cq_complete_one(cq);
+
+ /*
+ * If we're completed we've got a completion from another task that
+ * was just done with its call to secure world. Since yet another
+ * thread now is available in secure world wake up another eventual
+ * waiting task.
+ */
+ if (completion_done(&w->c))
+ optee_cq_complete_one(cq);
+
+ mutex_unlock(&cq->mutex);
+}
+
+/* Requires the filpstate mutex to be held */
+static struct optee_session *find_session(struct optee_context_data *ctxdata,
+ u32 session_id)
+{
+ struct optee_session *sess;
+
+ list_for_each_entry(sess, &ctxdata->sess_list, list_node)
+ if (sess->session_id == session_id)
+ return sess;
+
+ return NULL;
+}
+
+/**
+ * optee_do_call_with_arg() - Do an SMC to OP-TEE in secure world
+ * @ctx: calling context
+ * @parg: physical address of message to pass to secure world
+ *
+ * Does and SMC to OP-TEE in secure world and handles eventual resulting
+ * Remote Procedure Calls (RPC) from OP-TEE.
+ *
+ * Returns return code from secure world, 0 is OK
+ */
+u32 optee_do_call_with_arg(struct tee_context *ctx, phys_addr_t parg)
+{
+ struct optee *optee = tee_get_drvdata(ctx->teedev);
+ struct optee_call_waiter w;
+ struct optee_rpc_param param = { };
+ u32 ret;
+
+ param.a0 = OPTEE_SMC_CALL_WITH_ARG;
+ reg_pair_from_64(¶m.a1, ¶m.a2, parg);
+ /* Initialize waiter */
+ optee_cq_wait_init(&optee->call_queue, &w);
+ while (true) {
+ struct arm_smccc_res res;
+
+ optee->invoke_fn(param.a0, param.a1, param.a2, param.a3,
+ param.a4, param.a5, param.a6, param.a7,
+ &res);
+
+ if (res.a0 == OPTEE_SMC_RETURN_ETHREAD_LIMIT) {
+ /*
+ * Out of threads in secure world, wait for a thread
+ * become available.
+ */
+ optee_cq_wait_for_completion(&optee->call_queue, &w);
+ } else if (OPTEE_SMC_RETURN_IS_RPC(res.a0)) {
+ param.a0 = res.a0;
+ param.a1 = res.a1;
+ param.a2 = res.a2;
+ param.a3 = res.a3;
+ optee_handle_rpc(ctx, ¶m);
+ } else {
+ ret = res.a0;
+ break;
+ }
+ }
+
+ /*
+ * We're done with our thread in secure world, if there's any
+ * thread waiters wake up one.
+ */
+ optee_cq_wait_final(&optee->call_queue, &w);
+
+ return ret;
+}
+
+static struct tee_shm *get_msg_arg(struct tee_context *ctx, size_t num_params,
+ struct optee_msg_arg **msg_arg,
+ phys_addr_t *msg_parg)
+{
+ int rc;
+ struct tee_shm *shm;
+ struct optee_msg_arg *ma;
+
+ shm = tee_shm_alloc(ctx, OPTEE_MSG_GET_ARG_SIZE(num_params),
+ TEE_SHM_MAPPED);
+ if (IS_ERR(shm))
+ return shm;
+
+ ma = tee_shm_get_va(shm, 0);
+ if (IS_ERR(ma)) {
+ rc = PTR_ERR(ma);
+ goto out;
+ }
+
+ rc = tee_shm_get_pa(shm, 0, msg_parg);
+ if (rc)
+ goto out;
+
+ memset(ma, 0, OPTEE_MSG_GET_ARG_SIZE(num_params));
+ ma->num_params = num_params;
+ *msg_arg = ma;
+out:
+ if (rc) {
+ tee_shm_free(shm);
+ return ERR_PTR(rc);
+ }
+
+ return shm;
+}
+
+int optee_open_session(struct tee_context *ctx,
+ struct tee_ioctl_open_session_arg *arg,
+ struct tee_param *param)
+{
+ struct optee_context_data *ctxdata = ctx->data;
+ int rc;
+ struct tee_shm *shm;
+ struct optee_msg_arg *msg_arg;
+ phys_addr_t msg_parg;
+ struct optee_session *sess = NULL;
+
+ /* +2 for the meta parameters added below */
+ shm = get_msg_arg(ctx, arg->num_params + 2, &msg_arg, &msg_parg);
+ if (IS_ERR(shm))
+ return PTR_ERR(shm);
+
+ msg_arg->cmd = OPTEE_MSG_CMD_OPEN_SESSION;
+ msg_arg->cancel_id = arg->cancel_id;
+
+ /*
+ * 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 = optee_to_msg_param(msg_arg->params + 2, arg->num_params, param);
+ if (rc)
+ goto out;
+
+ sess = kzalloc(sizeof(*sess), GFP_KERNEL);
+ if (!sess) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ if (optee_do_call_with_arg(ctx, msg_parg)) {
+ msg_arg->ret = TEEC_ERROR_COMMUNICATION;
+ msg_arg->ret_origin = TEEC_ORIGIN_COMMS;
+ }
+
+ if (msg_arg->ret == TEEC_SUCCESS) {
+ /* A new session has been created, add it to the list. */
+ sess->session_id = msg_arg->session;
+ mutex_lock(&ctxdata->mutex);
+ list_add(&sess->list_node, &ctxdata->sess_list);
+ mutex_unlock(&ctxdata->mutex);
+ } else {
+ kfree(sess);
+ }
+
+ if (optee_from_msg_param(param, arg->num_params, msg_arg->params + 2)) {
+ arg->ret = TEEC_ERROR_COMMUNICATION;
+ arg->ret_origin = TEEC_ORIGIN_COMMS;
+ /* Close session again to avoid leakage */
+ optee_close_session(ctx, msg_arg->session);
+ } else {
+ arg->session = msg_arg->session;
+ arg->ret = msg_arg->ret;
+ arg->ret_origin = msg_arg->ret_origin;
+ }
+out:
+ tee_shm_free(shm);
+
+ return rc;
+}
+
+int optee_close_session(struct tee_context *ctx, u32 session)
+{
+ struct optee_context_data *ctxdata = ctx->data;
+ struct tee_shm *shm;
+ struct optee_msg_arg *msg_arg;
+ phys_addr_t msg_parg;
+ struct optee_session *sess;
+
+ /* Check that the session is valid and remove it from the list */
+ mutex_lock(&ctxdata->mutex);
+ sess = find_session(ctxdata, session);
+ if (sess)
+ list_del(&sess->list_node);
+ mutex_unlock(&ctxdata->mutex);
+ if (!sess)
+ return -EINVAL;
+ kfree(sess);
+
+ shm = get_msg_arg(ctx, 0, &msg_arg, &msg_parg);
+ if (IS_ERR(shm))
+ return PTR_ERR(shm);
+
+ msg_arg->cmd = OPTEE_MSG_CMD_CLOSE_SESSION;
+ msg_arg->session = session;
+ optee_do_call_with_arg(ctx, msg_parg);
+
+ tee_shm_free(shm);
+ return 0;
+}
+
+int optee_invoke_func(struct tee_context *ctx, struct tee_ioctl_invoke_arg *arg,
+ struct tee_param *param)
+{
+ struct optee_context_data *ctxdata = ctx->data;
+ struct tee_shm *shm;
+ struct optee_msg_arg *msg_arg;
+ phys_addr_t msg_parg;
+ struct optee_session *sess;
+ int rc;
+
+ /* Check that the session is valid */
+ mutex_lock(&ctxdata->mutex);
+ sess = find_session(ctxdata, arg->session);
+ mutex_unlock(&ctxdata->mutex);
+ if (!sess)
+ return -EINVAL;
+
+ shm = get_msg_arg(ctx, arg->num_params, &msg_arg, &msg_parg);
+ if (IS_ERR(shm))
+ return PTR_ERR(shm);
+ msg_arg->cmd = OPTEE_MSG_CMD_INVOKE_COMMAND;
+ msg_arg->func = arg->func;
+ msg_arg->session = arg->session;
+ msg_arg->cancel_id = arg->cancel_id;
+
+ rc = optee_to_msg_param(msg_arg->params, arg->num_params, param);
+ if (rc)
+ goto out;
+
+ if (optee_do_call_with_arg(ctx, msg_parg)) {
+ msg_arg->ret = TEEC_ERROR_COMMUNICATION;
+ msg_arg->ret_origin = TEEC_ORIGIN_COMMS;
+ }
+
+ if (optee_from_msg_param(param, arg->num_params, msg_arg->params)) {
+ msg_arg->ret = TEEC_ERROR_COMMUNICATION;
+ msg_arg->ret_origin = TEEC_ORIGIN_COMMS;
+ }
+
+ arg->ret = msg_arg->ret;
+ arg->ret_origin = msg_arg->ret_origin;
+out:
+ tee_shm_free(shm);
+ return rc;
+}
+
+int optee_cancel_req(struct tee_context *ctx, u32 cancel_id, u32 session)
+{
+ struct optee_context_data *ctxdata = ctx->data;
+ struct tee_shm *shm;
+ struct optee_msg_arg *msg_arg;
+ phys_addr_t msg_parg;
+ struct optee_session *sess;
+
+ /* Check that the session is valid */
+ mutex_lock(&ctxdata->mutex);
+ sess = find_session(ctxdata, session);
+ mutex_unlock(&ctxdata->mutex);
+ if (!sess)
+ return -EINVAL;
+
+ shm = get_msg_arg(ctx, 0, &msg_arg, &msg_parg);
+ if (IS_ERR(shm))
+ return PTR_ERR(shm);
+
+ msg_arg->cmd = OPTEE_MSG_CMD_CANCEL;
+ msg_arg->session = session;
+ msg_arg->cancel_id = cancel_id;
+ optee_do_call_with_arg(ctx, msg_parg);
+
+ tee_shm_free(shm);
+ return 0;
+}
+
+/**
+ * optee_enable_shm_cache() - Enables caching of some shared memory allocation
+ * in OP-TEE
+ * @optee: main service struct
+ */
+void optee_enable_shm_cache(struct optee *optee)
+{
+ struct optee_call_waiter w;
+
+ /* We need to retry until secure world isn't busy. */
+ optee_cq_wait_init(&optee->call_queue, &w);
+ while (true) {
+ struct arm_smccc_res res;
+
+ optee->invoke_fn(OPTEE_SMC_ENABLE_SHM_CACHE, 0, 0, 0, 0, 0, 0,
+ 0, &res);
+ if (res.a0 == OPTEE_SMC_RETURN_OK)
+ break;
+ optee_cq_wait_for_completion(&optee->call_queue, &w);
+ }
+ optee_cq_wait_final(&optee->call_queue, &w);
+}
+
+/**
+ * optee_disable_shm_cache() - Disables caching of some shared memory allocation
+ * in OP-TEE
+ * @optee: main service struct
+ */
+void optee_disable_shm_cache(struct optee *optee)
+{
+ struct optee_call_waiter w;
+
+ /* We need to retry until secure world isn't busy. */
+ optee_cq_wait_init(&optee->call_queue, &w);
+ while (true) {
+ union {
+ struct arm_smccc_res smccc;
+ struct optee_smc_disable_shm_cache_result result;
+ } res;
+
+ optee->invoke_fn(OPTEE_SMC_DISABLE_SHM_CACHE, 0, 0, 0, 0, 0, 0,
+ 0, &res.smccc);
+ if (res.result.status == OPTEE_SMC_RETURN_ENOTAVAIL)
+ break; /* All shm's freed */
+ if (res.result.status == OPTEE_SMC_RETURN_OK) {
+ struct tee_shm *shm;
+
+ shm = reg_pair_to_ptr(res.result.shm_upper32,
+ res.result.shm_lower32);
+ tee_shm_free(shm);
+ } else {
+ optee_cq_wait_for_completion(&optee->call_queue, &w);
+ }
+ }
+ optee_cq_wait_final(&optee->call_queue, &w);
+}