linux/drivers/hwtracing/stm/dummy_stm.c

// SPDX-License-Identifier: GPL-2.0
/*
 * A dummy STM device for stm/stm_source class testing.
 * Copyright (c) 2014, Intel Corporation.
 *
 * STM class implements generic infrastructure for  System Trace Module devices
 * as defined in MIPI STPv2 specification.
 */

#undef DEBUG
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/stm.h>
#include <uapi/linux/stm.h>

static ssize_t notrace
dummy_stm_packet(struct stm_data *stm_data, unsigned int master,
		 unsigned int channel, unsigned int packet, unsigned int flags,
		 unsigned int size, const unsigned char *payload)
{ … }

#define DUMMY_STM_MAX …

static struct stm_data dummy_stm[DUMMY_STM_MAX];

static int nr_dummies = …;

module_param(nr_dummies, int, 0400);

static unsigned int fail_mode;

module_param(fail_mode, int, 0600);

static unsigned int master_min;

module_param(master_min, int, 0400);

static unsigned int master_max = …;

module_param(master_max, int, 0400);

static unsigned int nr_channels = …;

module_param(nr_channels, int, 0400);

static int dummy_stm_link(struct stm_data *data, unsigned int master,
			  unsigned int channel)
{ … }

static int dummy_stm_init(void)
{ … }

static void dummy_stm_exit(void)
{ … }

module_init(…) …;
module_exit(dummy_stm_exit);

MODULE_LICENSE(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_AUTHOR(…) …;