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Code Issues Releases Activity

cpufreq_dt: Improve multiple opp support

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When looking for cpu with the same OPP starts from the root /cpus node
so each instance of cpufreq_dt will now each cpu with the same operating
point.
Also test that the node we are testing have the property "device_type" set
to be equal to "cpu".
While here add more debug printfs (off by defaults).

MFC after:	2 weeks
This commit is contained in:
Emmanuel Vadot 2020-03-02 21:19:51 +00:00
parent 2495ef28e9
commit a969e975c9
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=358555
1 changed files with 28 additions and 5 deletions
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33
sys/dev/cpufreq/cpufreq_dt.c
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@ -81,6 +81,7 @@ struct cpufreq_dt_softc {
struct cpufreq_dt_opp *opp;
ssize_t nopp;
int cpu;
cpuset_t cpus;
};
@ -169,6 +170,13 @@ cpufreq_dt_set(device_t dev, const struct cf_setting *set)
sc = device_get_softc(dev);
DEBUG(dev, "Working on cpu %d\n", sc->cpu);
DEBUG(dev, "We have %d cpu on this dev\n", CPU_COUNT(&sc->cpus));
if (!CPU_ISSET(sc->cpu, &sc->cpus)) {
DEBUG(dev, "Not for this CPU\n");
return (0);
}
if (clk_get_freq(sc->clk, &freq) != 0) {
device_printf(dev, "Can't get current clk freq\n");
return (ENXIO);
@ -190,7 +198,6 @@ cpufreq_dt_set(device_t dev, const struct cf_setting *set)
return (ENOENT);
}
uvolt = copp->uvolt_target;
}
opp = cpufreq_dt_find_opp(sc->dev, set->freq * 1000000);
@ -449,14 +456,16 @@ cpufreq_dt_attach(device_t dev)
int cpu;
uint64_t freq;
int rv = 0;
char device_type[16];
enum opp_version version;
sc = device_get_softc(dev);
sc->dev = dev;
node = ofw_bus_get_node(device_get_parent(dev));
cpu = device_get_unit(device_get_parent(dev));
sc->cpu = device_get_unit(device_get_parent(dev));
if (cpu >= mp_ncpus) {
DEBUG(dev, "cpu=%d\n", sc->cpu);
if (sc->cpu >= mp_ncpus) {
device_printf(dev, "Not attaching as cpu is not present\n");
return (ENXIO);
}
@ -502,7 +511,18 @@ cpufreq_dt_attach(device_t dev)
* Find all CPUs that share the same opp table
*/
CPU_ZERO(&sc->cpus);
for (cnode = node; cnode > 0; cnode = OF_peer(cnode), cpu++) {
cnode = OF_parent(node);
for (cpu = 0, cnode = OF_child(cnode); cnode > 0; cnode = OF_peer(cnode)) {
if (OF_getprop(cnode, "device_type", device_type, sizeof(device_type)) <= 0)
continue;
if (strcmp(device_type, "cpu") != 0)
continue;
if (cpu == sc->cpu) {
DEBUG(dev, "Skipping our cpu\n");
cpu++;
continue;
}
DEBUG(dev, "Testing CPU %d\n", cpu);
copp = -1;
if (version == OPP_V1)
OF_getencprop(cnode, "operating-points", &copp,
@ -510,8 +530,11 @@ cpufreq_dt_attach(device_t dev)
else if (version == OPP_V2)
OF_getencprop(cnode, "operating-points-v2",
&copp, sizeof(copp));
if (opp == copp)
if (opp == copp) {
DEBUG(dev, "CPU %d is using the same opp as this one (%d)\n", cpu, sc->cpu);
CPU_SET(cpu, &sc->cpus);
}
cpu++;
}
if (clk_get_freq(sc->clk, &freq) == 0)