83 lines
2.6 KiB
C
83 lines
2.6 KiB
C
/*
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* Copyright (c) 2022 Intel Corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr/drivers/i3c.h>
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#include <string.h>
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#include <zephyr/internal/syscall_handler.h>
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static inline int z_vrfy_i3c_do_ccc(const struct device *dev,
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struct i3c_ccc_payload *payload)
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{
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K_OOPS(K_SYSCALL_DRIVER_I3C(dev, do_ccc));
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K_OOPS(K_SYSCALL_MEMORY_READ(payload, sizeof(*payload)));
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K_OOPS(K_SYSCALL_MEMORY_WRITE(payload, sizeof(*payload)));
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if (payload->ccc.data != NULL) {
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K_OOPS(K_SYSCALL_MEMORY_ARRAY_READ(payload->ccc.data,
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payload->ccc.data_len,
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sizeof(*payload->ccc.data)));
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K_OOPS(K_SYSCALL_MEMORY_ARRAY_WRITE(payload->ccc.data,
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payload->ccc.data_len,
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sizeof(*payload->ccc.data)));
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}
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if (payload->targets.payloads != NULL) {
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K_OOPS(K_SYSCALL_MEMORY_ARRAY_READ(payload->targets.payloads,
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payload->targets.num_targets,
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sizeof(*payload->targets.payloads)));
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K_OOPS(K_SYSCALL_MEMORY_ARRAY_WRITE(payload->targets.payloads,
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payload->targets.num_targets,
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sizeof(*payload->targets.payloads)));
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}
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return z_impl_i3c_do_ccc(dev, payload);
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}
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#include <syscalls/i3c_do_ccc_mrsh.c>
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static uint32_t copy_i3c_msgs_and_transfer(struct i3c_device_desc *target,
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const struct i3c_msg *msgs,
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uint8_t num_msgs)
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{
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struct i3c_msg copy[num_msgs];
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uint8_t i;
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/* Use a local copy to avoid switcheroo attacks. */
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memcpy(copy, msgs, num_msgs * sizeof(*msgs));
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/* Validate the buffers in each message struct. Read options require
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* that the target buffer be writable
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*/
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for (i = 0U; i < num_msgs; i++) {
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K_OOPS(K_SYSCALL_MEMORY(copy[i].buf, copy[i].len,
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copy[i].flags & I3C_MSG_READ));
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}
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return z_impl_i3c_transfer(target, copy, num_msgs);
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}
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static inline int z_vrfy_i3c_transfer(struct i3c_device_desc *target,
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struct i3c_msg *msgs, uint8_t num_msgs)
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{
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K_OOPS(K_SYSCALL_MEMORY_READ(target, sizeof(*target)));
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K_OOPS(K_SYSCALL_OBJ(target->bus, K_OBJ_DRIVER_I3C));
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/* copy_msgs_and_transfer() will allocate a copy on the stack using
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* VLA, so ensure this won't blow the stack. Most functions defined
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* in i2c.h use only a handful of messages, so up to 32 messages
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* should be more than sufficient.
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*/
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K_OOPS(K_SYSCALL_VERIFY(num_msgs >= 1 && num_msgs < 32));
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/* We need to be able to read the overall array of messages */
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K_OOPS(K_SYSCALL_MEMORY_ARRAY_READ(msgs, num_msgs,
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sizeof(struct i3c_msg)));
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return copy_i3c_msgs_and_transfer((struct i3c_device_desc *)target,
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(struct i3c_msg *)msgs,
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(uint8_t)num_msgs);
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}
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#include <syscalls/i3c_transfer_mrsh.c>
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