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Add the "freq_settings" sysctl to each device that registers with cpufreq

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so their individual settings can be seen separately for debugging.
This commit is contained in:
Nate Lawson 2005-02-20 00:59:15 +00:00
parent 6e0ee35d47
commit e959a70bad
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=142114
1 changed files with 41 additions and 0 deletions
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41
sys/kern/kern_cpu.c
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@ -91,6 +91,7 @@ static struct cf_level *cpufreq_dup_set(struct cpufreq_softc *sc,
struct cf_level *dup, struct cf_setting *set);
static int cpufreq_curr_sysctl(SYSCTL_HANDLER_ARGS);
static int cpufreq_levels_sysctl(SYSCTL_HANDLER_ARGS);
static int cpufreq_settings_sysctl(SYSCTL_HANDLER_ARGS);
static device_method_t cpufreq_methods[] = {
DEVMETHOD(device_probe, bus_generic_probe),
@ -745,12 +746,52 @@ cpufreq_levels_sysctl(SYSCTL_HANDLER_ARGS)
return (error);
}
static int
cpufreq_settings_sysctl(SYSCTL_HANDLER_ARGS)
{
device_t dev;
struct cf_setting *sets;
struct sbuf sb;
int error, i, set_count;
dev = oidp->oid_arg1;
sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND);
/* Get settings from the device and generate the output string. */
set_count = MAX_SETTINGS;
sets = malloc(set_count * sizeof(*sets), M_TEMP, M_NOWAIT);
if (sets == NULL)
return (ENOMEM);
error = CPUFREQ_DRV_SETTINGS(dev, sets, &set_count);
if (error)
goto out;
if (set_count) {
for (i = 0; i < set_count; i++)
sbuf_printf(&sb, "%d/%d ", sets[i].freq, sets[i].power);
} else
sbuf_cpy(&sb, "0");
sbuf_trim(&sb);
sbuf_finish(&sb);
error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req);
out:
free(sets, M_TEMP);
sbuf_delete(&sb);
return (error);
}
int
cpufreq_register(device_t dev)
{
struct cpufreq_softc *sc;
device_t cf_dev, cpu_dev;
/* Add a sysctl to get each driver's settings separately. */
SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
OID_AUTO, "freq_settings", CTLTYPE_STRING | CTLFLAG_RD, dev, 0,
cpufreq_settings_sysctl, "A", "CPU frequency driver settings");
/*
* Add only one cpufreq device to each CPU. Currently, all CPUs
* must offer the same levels and be switched at the same time.