/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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*
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* (C) COPYRIGHT 2019-2021 ARM Limited. All rights reserved.
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*
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* This program is free software and is provided to you under the terms of the
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* GNU General Public License version 2 as published by the Free Software
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* Foundation, and any use by you of this program is subject to the terms
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* of such GNU license.
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, you can access it online at
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* http://www.gnu.org/licenses/gpl-2.0.html.
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*
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*/
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#if !defined(_KBASE_TL_SERIALIZE_H)
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#define _KBASE_TL_SERIALIZE_H
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#include <mali_kbase.h>
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#include <linux/timer.h>
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/* The number of nanoseconds in a second. */
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#define NSECS_IN_SEC 1000000000ull /* ns */
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/**
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* kbasep_serialize_bytes - serialize bytes to the message buffer
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*
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* Serialize bytes as is using memcpy()
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*
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* @buffer: Message buffer
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* @pos: Message buffer offset
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* @bytes: Bytes to serialize
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* @len: Length of bytes array
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*
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* Return: updated position in the buffer
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*/
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static inline size_t kbasep_serialize_bytes(
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char *buffer,
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size_t pos,
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const void *bytes,
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size_t len)
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{
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KBASE_DEBUG_ASSERT(buffer);
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KBASE_DEBUG_ASSERT(bytes);
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memcpy(&buffer[pos], bytes, len);
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return pos + len;
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}
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/**
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* kbasep_serialize_string - serialize string to the message buffer
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*
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* String is serialized as 4 bytes for string size,
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* then string content and then null terminator.
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*
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* @buffer: Message buffer
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* @pos: Message buffer offset
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* @string: String to serialize
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* @max_write_size: Number of bytes that can be stored in buffer
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*
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* Return: updated position in the buffer
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*/
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static inline size_t kbasep_serialize_string(
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char *buffer,
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size_t pos,
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const char *string,
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size_t max_write_size)
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{
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u32 string_len;
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KBASE_DEBUG_ASSERT(buffer);
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KBASE_DEBUG_ASSERT(string);
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/* Timeline string consists of at least string length and nul
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* terminator.
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*/
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KBASE_DEBUG_ASSERT(max_write_size >= sizeof(string_len) + sizeof(char));
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max_write_size -= sizeof(string_len);
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string_len = strlcpy(
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&buffer[pos + sizeof(string_len)],
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string,
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max_write_size);
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string_len += sizeof(char);
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/* Make sure that the source string fit into the buffer. */
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KBASE_DEBUG_ASSERT(string_len <= max_write_size);
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/* Update string length. */
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memcpy(&buffer[pos], &string_len, sizeof(string_len));
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return pos + sizeof(string_len) + string_len;
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}
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/**
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* kbasep_serialize_timestamp - serialize timestamp to the message buffer
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*
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* Get current timestamp using kbasep_get_timestamp()
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* and serialize it as 64 bit unsigned integer.
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*
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* @buffer: Message buffer
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* @pos: Message buffer offset
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*
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* Return: updated position in the buffer
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*/
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static inline size_t kbasep_serialize_timestamp(void *buffer, size_t pos)
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{
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u64 timestamp;
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timestamp = ktime_get_raw_ns();
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return kbasep_serialize_bytes(
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buffer, pos,
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×tamp, sizeof(timestamp));
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}
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#endif /* _KBASE_TL_SERIALIZE_H */
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