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| author | Alexander Shishkin <alexander.shishkin@linux.intel.com> | 2018-02-23 12:19:43 +0100 |
|---|---|---|
| committer | Alexander Shishkin <alexander.shishkin@linux.intel.com> | 2018-03-28 17:47:18 +0200 |
| commit | 4f0c7c6a12906e3571abb3c2b93eca8f727f4c9c (patch) | |
| tree | c1059d2697ba34ee36bb5247a5e0908e3a289031 /drivers | |
| parent | stm class: Add SPDX GPL-2.0 header to replace GPLv2 boilerplate (diff) | |
| download | linux-4f0c7c6a12906e3571abb3c2b93eca8f727f4c9c.tar.xz linux-4f0c7c6a12906e3571abb3c2b93eca8f727f4c9c.zip | |
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: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/hwtracing/stm/dummy_stm.c | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/drivers/hwtracing/stm/dummy_stm.c b/drivers/hwtracing/stm/dummy_stm.c index 63288020ea5b..38528ffdc0b3 100644 --- a/drivers/hwtracing/stm/dummy_stm.c +++ b/drivers/hwtracing/stm/dummy_stm.c @@ -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; |