diff options
Diffstat (limited to 'drivers/hwtracing/stm/dummy_stm.c')
| -rw-r--r-- | drivers/hwtracing/stm/dummy_stm.c | 34 |
1 files changed, 22 insertions, 12 deletions
diff --git a/drivers/hwtracing/stm/dummy_stm.c b/drivers/hwtracing/stm/dummy_stm.c index c5f94ca31c4d..38528ffdc0b3 100644 --- a/drivers/hwtracing/stm/dummy_stm.c +++ b/drivers/hwtracing/stm/dummy_stm.c @@ -1,16 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0 /* * A dummy STM device for stm/stm_source class testing. * Copyright (c) 2014, Intel Corporation. * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope 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. - * * STM class implements generic infrastructure for System Trace Module devices * as defined in MIPI STPv2 specification. */ @@ -20,6 +12,7 @@ #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, @@ -52,6 +45,18 @@ 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 = STP_MASTER_MAX; + +module_param(master_max, int, 0400); + +static unsigned int nr_channels = STP_CHANNEL_MAX; + +module_param(nr_channels, int, 0400); + static int dummy_stm_link(struct stm_data *data, unsigned int master, unsigned int channel) { @@ -68,14 +73,19 @@ static int dummy_stm_init(void) if (nr_dummies < 0 || nr_dummies > DUMMY_STM_MAX) return -EINVAL; + if (master_min > master_max || + master_max > STP_MASTER_MAX || + nr_channels > STP_CHANNEL_MAX) + return -EINVAL; + for (i = 0; i < nr_dummies; i++) { dummy_stm[i].name = kasprintf(GFP_KERNEL, "dummy_stm.%d", i); if (!dummy_stm[i].name) goto fail_unregister; - dummy_stm[i].sw_start = 0x0000; - dummy_stm[i].sw_end = 0xffff; - dummy_stm[i].sw_nchannels = 0xffff; + dummy_stm[i].sw_start = master_min; + dummy_stm[i].sw_end = master_max; + dummy_stm[i].sw_nchannels = nr_channels; dummy_stm[i].packet = dummy_stm_packet; dummy_stm[i].link = dummy_stm_link; |