svn commit: r336478 - head/sys/dev/cpufreq
Emmanuel Vadot
manu at FreeBSD.org
Thu Jul 19 11:31:50 UTC 2018
Author: manu
Date: Thu Jul 19 11:31:49 2018
New Revision: 336478
URL: https://svnweb.freebsd.org/changeset/base/336478
Log:
cpufreq_dt: Add operating-points-v2 support
Oppv2 add more flexibility on regulator value for the core voltage amongst
other new thing.
For now only shared opp table is supported as I don't have hardware with
non-shared opp table.
Tested-On: OrangePi One (with oppv1 and oppv2)
Tested-On: Pine64-LTS
Modified:
head/sys/dev/cpufreq/cpufreq_dt.c
Modified: head/sys/dev/cpufreq/cpufreq_dt.c
==============================================================================
--- head/sys/dev/cpufreq/cpufreq_dt.c Thu Jul 19 11:28:14 2018 (r336477)
+++ head/sys/dev/cpufreq/cpufreq_dt.c Thu Jul 19 11:31:49 2018 (r336478)
@@ -1,4 +1,5 @@
/*-
+ * Copyright (c) 2018 Emmanuel Vadot <manu at FreeBSD.Org>
* Copyright (c) 2016 Jared McNeill <jmcneill at invisible.ca>
* All rights reserved.
*
@@ -51,18 +52,35 @@ __FBSDID("$FreeBSD$");
#include "cpufreq_if.h"
+#if 0
+#define DEBUG(dev, msg...) device_printf(dev, "cpufreq_dt: " msg);
+#else
+#define DEBUG(dev, msg...)
+#endif
+
+enum opp_version {
+ OPP_V1 = 1,
+ OPP_V2,
+};
+
struct cpufreq_dt_opp {
- uint32_t freq_khz;
- uint32_t voltage_uv;
+ uint64_t freq;
+ uint32_t uvolt_target;
+ uint32_t uvolt_min;
+ uint32_t uvolt_max;
+ uint32_t uamps;
+ uint32_t clk_latency;
+ bool turbo_mode;
+ bool opp_suspend;
};
struct cpufreq_dt_softc {
+ device_t dev;
clk_t clk;
regulator_t reg;
struct cpufreq_dt_opp *opp;
ssize_t nopp;
- int clk_latency;
cpuset_t cpus;
};
@@ -70,7 +88,6 @@ struct cpufreq_dt_softc {
static void
cpufreq_dt_notify(device_t dev, uint64_t freq)
{
-#ifdef __aarch64__
struct cpufreq_dt_softc *sc;
struct pcpu *pc;
int cpu;
@@ -83,21 +100,22 @@ cpufreq_dt_notify(device_t dev, uint64_t freq)
pc->pc_clock = freq;
}
}
-#endif
}
static const struct cpufreq_dt_opp *
-cpufreq_dt_find_opp(device_t dev, uint32_t freq_mhz)
+cpufreq_dt_find_opp(device_t dev, uint64_t freq)
{
struct cpufreq_dt_softc *sc;
ssize_t n;
sc = device_get_softc(dev);
+ DEBUG(dev, "Looking for freq %ju\n", freq);
for (n = 0; n < sc->nopp; n++)
- if (CPUFREQ_CMP(sc->opp[n].freq_khz / 1000, freq_mhz))
+ if (CPUFREQ_CMP(sc->opp[n].freq, freq))
return (&sc->opp[n]);
+ DEBUG(dev, "Couldn't find one\n");
return (NULL);
}
@@ -110,10 +128,10 @@ cpufreq_dt_opp_to_setting(device_t dev, const struct c
sc = device_get_softc(dev);
memset(set, 0, sizeof(*set));
- set->freq = opp->freq_khz / 1000;
- set->volts = opp->voltage_uv / 1000;
+ set->freq = opp->freq / 1000000;
+ set->volts = opp->uvolt_target / 1000;
set->power = CPUFREQ_VAL_UNKNOWN;
- set->lat = sc->clk_latency;
+ set->lat = opp->clk_latency;
set->dev = dev;
}
@@ -126,15 +144,19 @@ cpufreq_dt_get(device_t dev, struct cf_setting *set)
sc = device_get_softc(dev);
+ DEBUG(dev, "cpufreq_dt_get\n");
if (clk_get_freq(sc->clk, &freq) != 0)
return (ENXIO);
- opp = cpufreq_dt_find_opp(dev, freq / 1000000);
- if (opp == NULL)
+ opp = cpufreq_dt_find_opp(dev, freq);
+ if (opp == NULL) {
+ device_printf(dev, "Can't find the current freq in opp\n");
return (ENOENT);
+ }
cpufreq_dt_opp_to_setting(dev, opp, set);
+ DEBUG(dev, "Current freq %dMhz\n", set->freq);
return (0);
}
@@ -144,42 +166,61 @@ cpufreq_dt_set(device_t dev, const struct cf_setting *
struct cpufreq_dt_softc *sc;
const struct cpufreq_dt_opp *opp, *copp;
uint64_t freq;
- int error;
+ int error = 0;
sc = device_get_softc(dev);
- if (clk_get_freq(sc->clk, &freq) != 0)
+ if (clk_get_freq(sc->clk, &freq) != 0) {
+ device_printf(dev, "Can't get current clk freq\n");
return (ENXIO);
+ }
- copp = cpufreq_dt_find_opp(dev, freq / 1000000);
- if (copp == NULL)
+ DEBUG(sc->dev, "Current freq %ju\n", freq);
+ DEBUG(sc->dev, "Target freq %ju\n", (uint64_t)set->freq * 1000000);
+ copp = cpufreq_dt_find_opp(sc->dev, freq);
+ if (copp == NULL) {
+ device_printf(dev, "Can't find the current freq in opp\n");
return (ENOENT);
- opp = cpufreq_dt_find_opp(dev, set->freq);
- if (opp == NULL)
+ }
+ opp = cpufreq_dt_find_opp(sc->dev, set->freq * 1000000);
+ if (opp == NULL) {
+ device_printf(dev, "Couldn't find an opp for this freq\n");
return (EINVAL);
+ }
- if (copp->voltage_uv < opp->voltage_uv) {
- error = regulator_set_voltage(sc->reg, opp->voltage_uv,
- opp->voltage_uv);
- if (error != 0)
+ if (copp->uvolt_target < opp->uvolt_target) {
+ DEBUG(dev, "Changing regulator from %u to %u\n",
+ copp->uvolt_target, opp->uvolt_target);
+ error = regulator_set_voltage(sc->reg,
+ opp->uvolt_min,
+ opp->uvolt_max);
+ if (error != 0) {
+ DEBUG(dev, "Failed, backout\n");
return (ENXIO);
+ }
}
- error = clk_set_freq(sc->clk, (uint64_t)opp->freq_khz * 1000, 0);
+ DEBUG(dev, "Setting clk to %ju\n", opp->freq);
+ error = clk_set_freq(sc->clk, opp->freq, 0);
if (error != 0) {
+ DEBUG(dev, "Failed, backout\n");
/* Restore previous voltage (best effort) */
- (void)regulator_set_voltage(sc->reg, copp->voltage_uv,
- copp->voltage_uv);
+ error = regulator_set_voltage(sc->reg,
+ copp->uvolt_min,
+ copp->uvolt_max);
return (ENXIO);
}
- if (copp->voltage_uv > opp->voltage_uv) {
- error = regulator_set_voltage(sc->reg, opp->voltage_uv,
- opp->voltage_uv);
+ if (copp->uvolt_target > opp->uvolt_target) {
+ error = regulator_set_voltage(sc->reg,
+ opp->uvolt_min,
+ opp->uvolt_max);
if (error != 0) {
+ DEBUG(dev, "Failed to switch regulator to %d\n",
+ opp->uvolt_target);
/* Restore previous CPU frequency (best effort) */
(void)clk_set_freq(sc->clk,
- (uint64_t)copp->freq_khz * 1000, 0);
+ copp->freq, 0);
return (ENXIO);
}
}
@@ -207,6 +248,7 @@ cpufreq_dt_settings(device_t dev, struct cf_setting *s
struct cpufreq_dt_softc *sc;
ssize_t n;
+ DEBUG(dev, "cpufreq_dt_settings\n");
if (sets == NULL || count == NULL)
return (EINVAL);
@@ -234,11 +276,14 @@ cpufreq_dt_identify(driver_t *driver, device_t parent)
node = ofw_bus_get_node(parent);
/* The cpu at 0 node must have the following properties */
- if (!OF_hasprop(node, "operating-points") ||
- !OF_hasprop(node, "clocks") ||
+ if (!OF_hasprop(node, "clocks") ||
!OF_hasprop(node, "cpu-supply"))
return;
+ if (!OF_hasprop(node, "operating-points") &&
+ !OF_hasprop(node, "operating-points-v2"))
+ return;
+
if (device_find_child(parent, "cpufreq_dt", -1) != NULL)
return;
@@ -253,26 +298,143 @@ cpufreq_dt_probe(device_t dev)
node = ofw_bus_get_node(device_get_parent(dev));
- if (!OF_hasprop(node, "operating-points") ||
- !OF_hasprop(node, "clocks") ||
+ if (!OF_hasprop(node, "clocks") ||
!OF_hasprop(node, "cpu-supply"))
return (ENXIO);
+ if (!OF_hasprop(node, "operating-points") &&
+ !OF_hasprop(node, "operating-points-v2"))
+ return (ENXIO);
+
device_set_desc(dev, "Generic cpufreq driver");
return (BUS_PROBE_GENERIC);
}
static int
-cpufreq_dt_attach(device_t dev)
+cpufreq_dt_oppv1_parse(struct cpufreq_dt_softc *sc, phandle_t node)
{
- struct cpufreq_dt_softc *sc;
uint32_t *opp, lat;
- phandle_t node, cnode;
- uint64_t freq;
ssize_t n;
+
+ sc->nopp = OF_getencprop_alloc_multi(node, "operating-points",
+ sizeof(uint32_t) * 2, (void **)&opp);
+ if (sc->nopp == -1)
+ return (ENXIO);
+
+ if (OF_getencprop(node, "clock-latency", &lat, sizeof(lat)) == -1)
+ lat = CPUFREQ_VAL_UNKNOWN;
+
+ sc->opp = malloc(sizeof(*sc->opp) * sc->nopp, M_DEVBUF, M_WAITOK);
+
+ for (n = 0; n < sc->nopp; n++) {
+ sc->opp[n].freq = opp[n * 2 + 0] * 1000;
+ sc->opp[n].uvolt_min = opp[n * 2 + 1];
+ sc->opp[n].uvolt_max = sc->opp[n].uvolt_min;
+ sc->opp[n].uvolt_target = sc->opp[n].uvolt_min;
+ sc->opp[n].clk_latency = lat;
+
+ if (bootverbose)
+ device_printf(sc->dev, "%ju.%03ju MHz, %u uV\n",
+ sc->opp[n].freq / 1000000,
+ sc->opp[n].freq % 1000000,
+ sc->opp[n].uvolt_target);
+ }
+ free(opp, M_OFWPROP);
+
+ return (0);
+}
+
+static int
+cpufreq_dt_oppv2_parse(struct cpufreq_dt_softc *sc, phandle_t node)
+{
+ phandle_t opp, opp_table, opp_xref;
+ pcell_t cell[2];
+ uint32_t *volts, lat;
+ int nvolt, i;
+
+ if (OF_getencprop(node, "operating-points-v2", &opp_xref,
+ sizeof(opp_xref)) == -1) {
+ device_printf(sc->dev, "Cannot get xref to oppv2 table\n");
+ return (ENXIO);
+ }
+
+ opp_table = OF_node_from_xref(opp_xref);
+ if (opp_table == opp_xref)
+ return (ENXIO);
+
+ if (!OF_hasprop(opp_table, "opp-shared")) {
+ device_printf(sc->dev, "Only opp-shared is supported\n");
+ return (ENXIO);
+ }
+
+ for (opp = OF_child(opp_table); opp > 0; opp = OF_peer(opp))
+ sc->nopp += 1;
+
+ sc->opp = malloc(sizeof(*sc->opp) * sc->nopp, M_DEVBUF, M_WAITOK);
+
+ for (i = 0, opp_table = OF_child(opp_table); opp_table > 0;
+ opp_table = OF_peer(opp_table), i++) {
+ /* opp-hz is a required property */
+ if (OF_getencprop(opp_table, "opp-hz", cell,
+ sizeof(cell)) == -1)
+ continue;
+
+ sc->opp[i].freq = cell[0];
+ sc->opp[i].freq <<= 32;
+ sc->opp[i].freq |= cell[1];
+
+ if (OF_getencprop(opp_table, "clock-latency", &lat,
+ sizeof(lat)) == -1)
+ sc->opp[i].clk_latency = CPUFREQ_VAL_UNKNOWN;
+ else
+ sc->opp[i].clk_latency = (int)lat;
+
+ if (OF_hasprop(opp_table, "turbo-mode"))
+ sc->opp[i].turbo_mode = true;
+ if (OF_hasprop(opp_table, "opp-suspend"))
+ sc->opp[i].opp_suspend = true;
+
+ nvolt = OF_getencprop_alloc_multi(opp_table, "opp-microvolt",
+ sizeof(*volts), (void **)&volts);
+ if (nvolt == 1) {
+ sc->opp[i].uvolt_target = volts[0];
+ sc->opp[i].uvolt_min = volts[0];
+ sc->opp[i].uvolt_max = volts[0];
+ } else if (nvolt == 3) {
+ sc->opp[i].uvolt_target = volts[0];
+ sc->opp[i].uvolt_min = volts[1];
+ sc->opp[i].uvolt_max = volts[2];
+ } else {
+ device_printf(sc->dev,
+ "Wrong count of opp-microvolt property\n");
+ OF_prop_free(volts);
+ free(sc->opp, M_DEVBUF);
+ return (ENXIO);
+ }
+ OF_prop_free(volts);
+
+ if (bootverbose)
+ device_printf(sc->dev, "%ju.%03ju Mhz (%u uV)\n",
+ sc->opp[i].freq / 1000000,
+ sc->opp[i].freq % 1000000,
+ sc->opp[i].uvolt_target);
+ }
+ return (0);
+}
+
+static int
+cpufreq_dt_attach(device_t dev)
+{
+ struct cpufreq_dt_softc *sc;
+ phandle_t node;
+ phandle_t cnode, opp, copp;
int cpu;
+ uint64_t freq;
+ int rv = 0;
+ enum opp_version version;
sc = device_get_softc(dev);
+ sc->dev = dev;
node = ofw_bus_get_node(device_get_parent(dev));
if (regulator_get_by_ofw_property(dev, node,
@@ -289,39 +451,41 @@ cpufreq_dt_attach(device_t dev)
return (ENXIO);
}
- sc->nopp = OF_getencprop_alloc_multi(node, "operating-points",
- sizeof(*sc->opp), (void **)&opp);
- if (sc->nopp == -1)
- return (ENXIO);
- sc->opp = malloc(sizeof(*sc->opp) * sc->nopp, M_DEVBUF, M_WAITOK);
- for (n = 0; n < sc->nopp; n++) {
- sc->opp[n].freq_khz = opp[n * 2 + 0];
- sc->opp[n].voltage_uv = opp[n * 2 + 1];
-
- if (bootverbose)
- device_printf(dev, "%u.%03u MHz, %u uV\n",
- sc->opp[n].freq_khz / 1000,
- sc->opp[n].freq_khz % 1000,
- sc->opp[n].voltage_uv);
+ if (OF_hasprop(node, "operating-points")) {
+ version = OPP_V1;
+ rv = cpufreq_dt_oppv1_parse(sc, node);
+ if (rv != 0) {
+ device_printf(dev, "Failed to parse opp-v1 table\n");
+ return (rv);
+ }
+ OF_getencprop(node, "operating-points", &opp,
+ sizeof(opp));
+ } else {
+ version = OPP_V2;
+ rv = cpufreq_dt_oppv2_parse(sc, node);
+ if (rv != 0) {
+ device_printf(dev, "Failed to parse opp-v2 table\n");
+ return (rv);
+ }
+ OF_getencprop(node, "operating-points-v2", &opp,
+ sizeof(opp));
}
- free(opp, M_OFWPROP);
- if (OF_getencprop(node, "clock-latency", &lat, sizeof(lat)) == -1)
- sc->clk_latency = CPUFREQ_VAL_UNKNOWN;
- else
- sc->clk_latency = (int)lat;
-
/*
- * Find all CPUs that share the same voltage and CPU frequency
- * controls. Start with the current node and move forward until
- * the end is reached or a peer has an "operating-points" property.
+ * Find all CPUs that share the same opp table
*/
CPU_ZERO(&sc->cpus);
cpu = device_get_unit(device_get_parent(dev));
for (cnode = node; cnode > 0; cnode = OF_peer(cnode), cpu++) {
- if (cnode != node && OF_hasprop(cnode, "operating-points"))
- break;
- CPU_SET(cpu, &sc->cpus);
+ copp = -1;
+ if (version == OPP_V1)
+ OF_getencprop(cnode, "operating-points", &copp,
+ sizeof(copp));
+ else if (version == OPP_V2)
+ OF_getencprop(cnode, "operating-points-v2",
+ &copp, sizeof(copp));
+ if (opp == copp)
+ CPU_SET(cpu, &sc->cpus);
}
if (clk_get_freq(sc->clk, &freq) == 0)
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