Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 4f0c7c6a authored by Alexander Shishkin's avatar Alexander Shishkin
Browse files

stm class: Make dummy's master/channel ranges configurable 



To allow for more flexible testing of the stm class, make it possible
to specify the ranges of masters and channels that the dummy_stm devices
cover. This is done via module parameters.

Signed-off-by: default avatarAlexander Shishkin <alexander.shishkin@linux.intel.com>
parent 9ea393d8

drivers/hwtracing/stm/dummy_stm.c

+21 −3
Original line number Diff line number Diff line
@@ -12,6 +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,
@@ -44,6 +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)

{
@@ -60,14 +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;

include/uapi/linux/stm.h

+4 −0
Original line number Diff line number Diff line
@@ -12,6 +12,10 @@ 


#include <linux/types.h>



/* Maximum allowed master and channel values */

#define STP_MASTER_MAX	0xffff

#define STP_CHANNEL_MAX	0xffff



/**

 * struct stp_policy_id - identification for the STP policy

 * @size:	size of the structure including real id[] length