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@@ -0,0 +1,654 @@
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+// SPDX-License-Identifier: GPL-2.0+
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+/*
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+ * Copyright (c) 2018 Linaro Limited
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+ */
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+
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+#include <common.h>
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+#include <dm.h>
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+#include <log.h>
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+#include <tee.h>
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+#include <linux/arm-smccc.h>
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+#include <linux/io.h>
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+
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+#include "optee_smc.h"
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+#include "optee_msg.h"
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+#include "optee_private.h"
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+
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+#define PAGELIST_ENTRIES_PER_PAGE \
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+ ((OPTEE_MSG_NONCONTIG_PAGE_SIZE / sizeof(u64)) - 1)
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+
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+typedef void (optee_invoke_fn)(unsigned long, unsigned long, unsigned long,
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+ unsigned long, unsigned long, unsigned long,
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+ unsigned long, unsigned long,
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+ struct arm_smccc_res *);
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+
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+struct optee_pdata {
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+ optee_invoke_fn *invoke_fn;
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+};
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+
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+struct rpc_param {
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+ u32 a0;
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+ u32 a1;
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+ u32 a2;
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+ u32 a3;
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+ u32 a4;
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+ u32 a5;
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+ u32 a6;
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+ u32 a7;
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+};
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+
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+/**
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+ * reg_pair_to_ptr() - Make a pointer of 2 32-bit values
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+ * @reg0: High bits of the pointer
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+ * @reg1: Low bits of the pointer
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+ *
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+ * Returns the combined result, note that if a pointer is 32-bit wide @reg0
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+ * will be discarded.
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+ */
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+static void *reg_pair_to_ptr(u32 reg0, u32 reg1)
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+{
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+ return (void *)(ulong)(((u64)reg0 << 32) | reg1);
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+}
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+
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+/**
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+ * reg_pair_from_64() - Split a 64-bit value into two 32-bit values
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+ * @reg0: High bits of @val
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+ * @reg1: Low bits of @val
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+ * @val: The value to split
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+ */
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+static void reg_pair_from_64(u32 *reg0, u32 *reg1, u64 val)
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+{
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+ *reg0 = val >> 32;
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+ *reg1 = val;
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+}
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+
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+/**
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+ * optee_alloc_and_init_page_list() - Provide page list of memory buffer
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+ * @buf: Start of buffer
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+ * @len: Length of buffer
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+ * @phys_buf_ptr Physical pointer with coded offset to page list
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+ *
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+ * Secure world doesn't share mapping with Normal world (U-Boot in this case)
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+ * so physical pointers are needed when sharing pointers.
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+ *
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+ * Returns a pointer page list on success or NULL on failure
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+ */
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+void *optee_alloc_and_init_page_list(void *buf, ulong len, u64 *phys_buf_ptr)
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+{
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+ const unsigned int page_size = OPTEE_MSG_NONCONTIG_PAGE_SIZE;
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+ const phys_addr_t page_mask = page_size - 1;
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+ u8 *buf_base;
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+ unsigned int page_offset;
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+ unsigned int num_pages;
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+ unsigned int list_size;
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+ unsigned int n;
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+ void *page_list;
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+ struct {
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+ u64 pages_list[PAGELIST_ENTRIES_PER_PAGE];
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+ u64 next_page_data;
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+ } *pages_data;
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+
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+ /*
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+ * A Memory buffer is described in chunks of 4k. The list of
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+ * physical addresses has to be represented by a physical pointer
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+ * too and a single list has to start at a 4k page and fit into
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+ * that page. In order to be able to describe large memory buffers
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+ * these 4k pages carrying physical addresses are linked together
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+ * in a list. See OPTEE_MSG_ATTR_NONCONTIG in
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+ * drivers/tee/optee/optee_msg.h for more information.
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+ */
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+
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+ page_offset = (ulong)buf & page_mask;
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+ num_pages = roundup(page_offset + len, page_size) / page_size;
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+ list_size = DIV_ROUND_UP(num_pages, PAGELIST_ENTRIES_PER_PAGE) *
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+ page_size;
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+ page_list = memalign(page_size, list_size);
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+ if (!page_list)
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+ return NULL;
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+
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+ pages_data = page_list;
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+ buf_base = (u8 *)rounddown((ulong)buf, page_size);
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+ n = 0;
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+ while (num_pages) {
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+ pages_data->pages_list[n] = virt_to_phys(buf_base);
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+ n++;
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+ buf_base += page_size;
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+ num_pages--;
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+
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+ if (n == PAGELIST_ENTRIES_PER_PAGE) {
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+ pages_data->next_page_data =
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+ virt_to_phys(pages_data + 1);
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+ pages_data++;
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+ n = 0;
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+ }
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+ }
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+
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+ *phys_buf_ptr = virt_to_phys(page_list) | page_offset;
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+ return page_list;
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+}
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+
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+static void optee_get_version(struct udevice *dev,
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+ struct tee_version_data *vers)
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+{
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+ struct tee_version_data v = {
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+ .gen_caps = TEE_GEN_CAP_GP | TEE_GEN_CAP_REG_MEM,
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+ };
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+
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+ *vers = v;
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+}
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+
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+static int get_msg_arg(struct udevice *dev, uint num_params,
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+ struct tee_shm **shmp, struct optee_msg_arg **msg_arg)
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+{
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+ int rc;
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+ struct optee_msg_arg *ma;
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+
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+ rc = __tee_shm_add(dev, OPTEE_MSG_NONCONTIG_PAGE_SIZE, NULL,
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+ OPTEE_MSG_GET_ARG_SIZE(num_params), TEE_SHM_ALLOC,
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+ shmp);
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+ if (rc)
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+ return rc;
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+
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+ ma = (*shmp)->addr;
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+ memset(ma, 0, OPTEE_MSG_GET_ARG_SIZE(num_params));
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+ ma->num_params = num_params;
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+ *msg_arg = ma;
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+
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+ return 0;
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+}
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+
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+static int to_msg_param(struct optee_msg_param *msg_params, uint num_params,
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+ const struct tee_param *params)
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+{
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+ uint n;
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+
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+ for (n = 0; n < num_params; n++) {
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+ const struct tee_param *p = params + n;
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+ struct optee_msg_param *mp = msg_params + n;
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+
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+ switch (p->attr) {
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+ case TEE_PARAM_ATTR_TYPE_NONE:
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+ mp->attr = OPTEE_MSG_ATTR_TYPE_NONE;
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+ memset(&mp->u, 0, sizeof(mp->u));
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+ break;
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+ case TEE_PARAM_ATTR_TYPE_VALUE_INPUT:
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+ case TEE_PARAM_ATTR_TYPE_VALUE_OUTPUT:
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+ case TEE_PARAM_ATTR_TYPE_VALUE_INOUT:
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+ mp->attr = OPTEE_MSG_ATTR_TYPE_VALUE_INPUT + p->attr -
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+ TEE_PARAM_ATTR_TYPE_VALUE_INPUT;
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+ mp->u.value.a = p->u.value.a;
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+ mp->u.value.b = p->u.value.b;
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+ mp->u.value.c = p->u.value.c;
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+ break;
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+ case TEE_PARAM_ATTR_TYPE_MEMREF_INPUT:
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+ case TEE_PARAM_ATTR_TYPE_MEMREF_OUTPUT:
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+ case TEE_PARAM_ATTR_TYPE_MEMREF_INOUT:
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+ mp->attr = OPTEE_MSG_ATTR_TYPE_RMEM_INPUT + p->attr -
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+ TEE_PARAM_ATTR_TYPE_MEMREF_INPUT;
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+ mp->u.rmem.shm_ref = (ulong)p->u.memref.shm;
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+ mp->u.rmem.size = p->u.memref.size;
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+ mp->u.rmem.offs = p->u.memref.shm_offs;
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+ break;
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+ default:
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+ return -EINVAL;
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+ }
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+ }
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+ return 0;
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+}
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+
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+static int from_msg_param(struct tee_param *params, uint num_params,
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+ const struct optee_msg_param *msg_params)
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+{
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+ uint n;
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+ struct tee_shm *shm;
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+
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+ for (n = 0; n < num_params; n++) {
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+ struct tee_param *p = params + n;
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+ const struct optee_msg_param *mp = msg_params + n;
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+ u32 attr = mp->attr & OPTEE_MSG_ATTR_TYPE_MASK;
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+
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+ switch (attr) {
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+ case OPTEE_MSG_ATTR_TYPE_NONE:
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+ p->attr = TEE_PARAM_ATTR_TYPE_NONE;
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+ memset(&p->u, 0, sizeof(p->u));
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+ break;
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+ case OPTEE_MSG_ATTR_TYPE_VALUE_INPUT:
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+ case OPTEE_MSG_ATTR_TYPE_VALUE_OUTPUT:
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+ case OPTEE_MSG_ATTR_TYPE_VALUE_INOUT:
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+ p->attr = TEE_PARAM_ATTR_TYPE_VALUE_INPUT + attr -
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+ OPTEE_MSG_ATTR_TYPE_VALUE_INPUT;
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+ p->u.value.a = mp->u.value.a;
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+ p->u.value.b = mp->u.value.b;
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+ p->u.value.c = mp->u.value.c;
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+ break;
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+ case OPTEE_MSG_ATTR_TYPE_RMEM_INPUT:
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+ case OPTEE_MSG_ATTR_TYPE_RMEM_OUTPUT:
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+ case OPTEE_MSG_ATTR_TYPE_RMEM_INOUT:
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+ p->attr = TEE_PARAM_ATTR_TYPE_MEMREF_INPUT + attr -
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+ OPTEE_MSG_ATTR_TYPE_RMEM_INPUT;
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+ p->u.memref.size = mp->u.rmem.size;
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+ shm = (struct tee_shm *)(ulong)mp->u.rmem.shm_ref;
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+
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+ if (!shm) {
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+ p->u.memref.shm_offs = 0;
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+ p->u.memref.shm = NULL;
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+ break;
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+ }
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+ p->u.memref.shm_offs = mp->u.rmem.offs;
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+ p->u.memref.shm = shm;
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+ break;
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+ default:
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+ return -EINVAL;
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+ }
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+ }
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+ return 0;
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+}
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+
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+static void handle_rpc(struct udevice *dev, struct rpc_param *param,
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+ void *page_list)
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+{
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+ struct tee_shm *shm;
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+
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+ switch (OPTEE_SMC_RETURN_GET_RPC_FUNC(param->a0)) {
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+ case OPTEE_SMC_RPC_FUNC_ALLOC:
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+ if (!__tee_shm_add(dev, OPTEE_MSG_NONCONTIG_PAGE_SIZE, NULL,
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+ param->a1, TEE_SHM_ALLOC | TEE_SHM_REGISTER,
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+ &shm)) {
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+ reg_pair_from_64(¶m->a1, ¶m->a2,
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+ virt_to_phys(shm->addr));
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+ /* "cookie" */
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+ reg_pair_from_64(¶m->a4, ¶m->a5, (ulong)shm);
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+ } else {
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+ param->a1 = 0;
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+ param->a2 = 0;
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+ param->a4 = 0;
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+ param->a5 = 0;
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+ }
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+ break;
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+ case OPTEE_SMC_RPC_FUNC_FREE:
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+ shm = reg_pair_to_ptr(param->a1, param->a2);
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+ tee_shm_free(shm);
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+ break;
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+ case OPTEE_SMC_RPC_FUNC_FOREIGN_INTR:
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+ break;
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+ case OPTEE_SMC_RPC_FUNC_CMD:
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+ shm = reg_pair_to_ptr(param->a1, param->a2);
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+ optee_suppl_cmd(dev, shm, page_list);
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+ break;
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+ default:
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+ break;
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+ }
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+
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+ param->a0 = OPTEE_SMC_CALL_RETURN_FROM_RPC;
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+}
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+
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+static u32 call_err_to_res(u32 call_err)
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+{
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+ switch (call_err) {
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+ case OPTEE_SMC_RETURN_OK:
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+ return TEE_SUCCESS;
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+ default:
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+ return TEE_ERROR_BAD_PARAMETERS;
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+ }
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+}
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+
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+static u32 do_call_with_arg(struct udevice *dev, struct optee_msg_arg *arg)
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+{
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+ struct optee_pdata *pdata = dev_get_platdata(dev);
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+ struct rpc_param param = { .a0 = OPTEE_SMC_CALL_WITH_ARG };
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+ void *page_list = NULL;
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+
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+ reg_pair_from_64(¶m.a1, ¶m.a2, virt_to_phys(arg));
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+ while (true) {
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+ struct arm_smccc_res res;
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+
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+ pdata->invoke_fn(param.a0, param.a1, param.a2, param.a3,
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+ param.a4, param.a5, param.a6, param.a7, &res);
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+
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+ free(page_list);
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+ page_list = NULL;
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+
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+ if (OPTEE_SMC_RETURN_IS_RPC(res.a0)) {
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+ param.a0 = res.a0;
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+ param.a1 = res.a1;
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+ param.a2 = res.a2;
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+ param.a3 = res.a3;
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+ handle_rpc(dev, ¶m, &page_list);
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+ } else {
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+ return call_err_to_res(res.a0);
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+ }
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+ }
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+}
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+
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+static int optee_close_session(struct udevice *dev, u32 session)
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+{
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+ int rc;
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+ struct tee_shm *shm;
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+ struct optee_msg_arg *msg_arg;
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+
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+ rc = get_msg_arg(dev, 0, &shm, &msg_arg);
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+ if (rc)
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+ return rc;
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+
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+ msg_arg->cmd = OPTEE_MSG_CMD_CLOSE_SESSION;
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+ msg_arg->session = session;
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+ do_call_with_arg(dev, msg_arg);
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+
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+ tee_shm_free(shm);
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+
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+ return 0;
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+}
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+
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+static int optee_open_session(struct udevice *dev,
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+ struct tee_open_session_arg *arg,
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+ uint num_params, struct tee_param *params)
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+{
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+ int rc;
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+ struct tee_shm *shm;
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+ struct optee_msg_arg *msg_arg;
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+
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+ rc = get_msg_arg(dev, num_params + 2, &shm, &msg_arg);
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+ if (rc)
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+ return rc;
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+
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+ msg_arg->cmd = OPTEE_MSG_CMD_OPEN_SESSION;
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+ /*
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+ * Initialize and add the meta parameters needed when opening a
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+ * session.
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+ */
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+ msg_arg->params[0].attr = OPTEE_MSG_ATTR_TYPE_VALUE_INPUT |
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+ OPTEE_MSG_ATTR_META;
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+ msg_arg->params[1].attr = OPTEE_MSG_ATTR_TYPE_VALUE_INPUT |
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+ OPTEE_MSG_ATTR_META;
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+ memcpy(&msg_arg->params[0].u.value, arg->uuid, sizeof(arg->uuid));
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+ memcpy(&msg_arg->params[1].u.value, arg->uuid, sizeof(arg->clnt_uuid));
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+ msg_arg->params[1].u.value.c = arg->clnt_login;
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+
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+ rc = to_msg_param(msg_arg->params + 2, num_params, params);
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+ if (rc)
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+ goto out;
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+
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+ arg->ret = do_call_with_arg(dev, msg_arg);
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+ if (arg->ret) {
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+ arg->ret_origin = TEE_ORIGIN_COMMS;
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+ goto out;
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+ }
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+
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+ if (from_msg_param(params, num_params, msg_arg->params + 2)) {
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+ arg->ret = TEE_ERROR_COMMUNICATION;
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+ arg->ret_origin = TEE_ORIGIN_COMMS;
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+ /* Close session again to avoid leakage */
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+ optee_close_session(dev, msg_arg->session);
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+ goto out;
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+ }
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+
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+ arg->session = msg_arg->session;
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+ arg->ret = msg_arg->ret;
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+ arg->ret_origin = msg_arg->ret_origin;
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+out:
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+ tee_shm_free(shm);
|
|
|
+
|
|
|
+ return rc;
|
|
|
+}
|
|
|
+
|
|
|
+static int optee_invoke_func(struct udevice *dev, struct tee_invoke_arg *arg,
|
|
|
+ uint num_params, struct tee_param *params)
|
|
|
+{
|
|
|
+ struct tee_shm *shm;
|
|
|
+ struct optee_msg_arg *msg_arg;
|
|
|
+ int rc;
|
|
|
+
|
|
|
+ rc = get_msg_arg(dev, num_params, &shm, &msg_arg);
|
|
|
+ if (rc)
|
|
|
+ return rc;
|
|
|
+ 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;
|
|
|
+
|
|
|
+ rc = get_msg_arg(dev, 1, &shm_arg, &msg_arg);
|
|
|
+ if (rc)
|
|
|
+ return rc;
|
|
|
+
|
|
|
+ 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;
|
|
|
+
|
|
|
+ rc = get_msg_arg(dev, 1, &shm_arg, &msg_arg);
|
|
|
+ if (rc)
|
|
|
+ return rc;
|
|
|
+
|
|
|
+ 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),
|
|
|
+};
|