On Mon, Jan 10, 2022 at 1:35 AM Philippe Mathieu-Daudé <f4...@amsat.org> wrote:
> Hi Patrick, > > On 1/8/22 04:04, Patrick Venture wrote: > > From: Hao Wu <wuhao...@google.com> > > > > SB Temperature Sensor Interface (SB-TSI) is an SMBus compatible > > interface that reports AMD SoC's Ttcl (normalized temperature), > > and resembles a typical 8-pin remote temperature sensor's I2C interface > > to BMC. > > > > This patch implements a basic AMD SB-TSI sensor that is > > compatible with the open-source data sheet from AMD and Linux > > kernel driver. > > > > Reference: > > Linux kernel driver: > > https://lkml.org/lkml/2020/12/11/968 > > Register Map: > > https://developer.amd.com/wp-content/resources/56255_3_03.PDF > > (Chapter 6) > > > > Signed-off-by: Hao Wu <wuhao...@google.com> > > Reviewed-by: Doug Evans <d...@google.com> > > --- > > hw/sensor/Kconfig | 4 + > > hw/sensor/meson.build | 1 + > > hw/sensor/tmp_sbtsi.c | 393 +++++++++++++++++++++++++++++++++++ > > hw/sensor/trace-events | 5 + > > hw/sensor/trace.h | 1 + > > meson.build | 1 + > > > tests/qtest/meson.build | 1 + > > tests/qtest/tmp_sbtsi-test.c | 180 ++++++++++++++++ > > Up to Thomas for qtest, but I'd rather split in 2 patches since > different set of maintainers / reviewers. > > > +++ b/hw/sensor/tmp_sbtsi.c > > @@ -0,0 +1,393 @@ > > +/* > > + * AMD SBI Temperature Sensor Interface (SB-TSI) > > + * > > + * Copyright 2021 Google LLC > > + * > > + * This program is free software; you can redistribute it and/or modify > it > > + * under the terms of the GNU General Public License as published by the > > + * Free Software Foundation; either version 2 of the License, or > > + * (at your option) any later version. > > + * > > + * This program is distributed in the hope that it will be useful, but > WITHOUT > > + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or > > + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License > > + * for more details. > > + */ > > + > > +#include "qemu/osdep.h" > > +#include "hw/i2c/smbus_slave.h" > > +#include "hw/irq.h" > > +#include "migration/vmstate.h" > > +#include "qapi/error.h" > > +#include "qapi/visitor.h" > > +#include "qemu/log.h" > > +#include "qemu/module.h" > > +#include "trace.h" > > + > > +#define TYPE_SBTSI "sbtsi" > > If you add include/hw/sensor/sbtsi.h, please define the type there, ... > > > +/* > > + * SB-TSI registers only support SMBus byte data access. "_INT" > registers are > > + * the integer part of a temperature value or limit, and "_DEC" > registers are > > + * corresponding decimal parts. > > + */ > > +#define SBTSI_REG_TEMP_INT 0x01 /* RO */ > > +#define SBTSI_REG_STATUS 0x02 /* RO */ > > +#define SBTSI_REG_CONFIG 0x03 /* RO */ > > +#define SBTSI_REG_TEMP_HIGH_INT 0x07 /* RW */ > > +#define SBTSI_REG_TEMP_LOW_INT 0x08 /* RW */ > > +#define SBTSI_REG_CONFIG_WR 0x09 /* RW */ > > +#define SBTSI_REG_TEMP_DEC 0x10 /* RO */ > > +#define SBTSI_REG_TEMP_HIGH_DEC 0x13 /* RW */ > > +#define SBTSI_REG_TEMP_LOW_DEC 0x14 /* RW */ > > +#define SBTSI_REG_ALERT_CONFIG 0xBF /* RW */ > > +#define SBTSI_REG_MAN 0xFE /* RO */ > > +#define SBTSI_REG_REV 0xFF /* RO */ > > + > > +#define SBTSI_STATUS_HIGH_ALERT BIT(4) > > +#define SBTSI_STATUS_LOW_ALERT BIT(3) > > +#define SBTSI_CONFIG_ALERT_MASK BIT(7) > > +#define SBTSI_ALARM_EN BIT(0) > > beside these definitions can be share with qtests. > > > +/* The temperature we stored are in units of 0.125 degrees. */ > > +#define SBTSI_TEMP_UNIT_IN_MILLIDEGREE 125 > > + > > +/* > > + * The integer part and decimal of the temperature both 8 bits. > > + * Only the top 3 bits of the decimal parts are used. > > + * So the max temperature is (2^8-1) + (2^3-1)/8 = 255.875 degrees. > > + */ > > +#define SBTSI_TEMP_MAX 255875 > > Nitpicking, use _IN_MILLIDEGREE suffix? > I haven't seen this suffix before, is this a style you'd like to start seeing? > > > +static void sbtsi_init(Object *obj) > > +{ > > + SBTSIState *s = SBTSI(obj); > > + > > + /* Current temperature in millidegrees. */ > > + object_property_add(obj, "temperature", "uint32", > > Can we explicit as "temperature_uC"? > We can, but that's non-standard. As I recall most temperature sensors in hw/sensors are in millidegrees, but none have unit suffixes. > > > + sbtsi_get_temperature, sbtsi_set_temperature, > > + NULL, NULL); > > + qdev_init_gpio_out_named(DEVICE(obj), &s->alarm, SBTSI_ALARM_L, 0); > > +} > > + > > +static void sbtsi_class_init(ObjectClass *klass, void *data) > > +{ > > + ResettableClass *rc = RESETTABLE_CLASS(klass); > > + DeviceClass *dc = DEVICE_CLASS(klass); > > + SMBusDeviceClass *k = SMBUS_DEVICE_CLASS(klass); > > + > > + dc->desc = "SB-TSI Temperature Sensor"; > > + dc->vmsd = &vmstate_sbtsi; > > + k->write_data = sbtsi_write_data; > > + k->receive_byte = sbtsi_read_byte; > > + rc->phases.enter = sbtsi_enter_reset; > > + rc->phases.hold = sbtsi_hold_reset; > > If my previous patch [*] were in, I'd have asked for: > > set_bit(DEVICE_CATEGORY_SENSOR, dc->categories); > > But since it isn't, I'll keep an eye on which goes in first. > > [*] https://www.mail-archive.com/qemu-devel@nongnu.org/msg847088.html > > > diff --git a/tests/qtest/tmp_sbtsi-test.c b/tests/qtest/tmp_sbtsi-test.c > > new file mode 100644 > > index 0000000000..7f5fafacc7 > > --- /dev/null > > +++ b/tests/qtest/tmp_sbtsi-test.c > > @@ -0,0 +1,180 @@ > > +/* > > + * QTests for the SBTSI temperature sensor > > + * > > + * Copyright 2020 Google LLC > > + * > > + * This program is free software; you can redistribute it and/or modify > it > > + * under the terms of the GNU General Public License as published by the > > + * Free Software Foundation; either version 2 of the License, or > > + * (at your option) any later version. > > + * > > + * This program is distributed in the hope that it will be useful, but > WITHOUT > > + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or > > + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License > > + * for more details. > > + */ > > + > > +#include "qemu/osdep.h" > > + > > +#include "libqtest-single.h" > > +#include "libqos/qgraph.h" > > +#include "libqos/i2c.h" > > +#include "qapi/qmp/qdict.h" > > +#include "qemu/bitops.h" > > + > > +#define TEST_ID "sbtsi-test" > > +#define TEST_ADDR (0x4c) > > + > > +/* > > + * SB-TSI registers only support SMBus byte data access. "_INT" > registers are > > + * the integer part of a temperature value or limit, and "_DEC" > registers are > > + * corresponding decimal parts. > > + */ > > +#define REG_TEMP_INT 0x01 /* RO */ > > +#define REG_STATUS 0x02 /* RO */ > > +#define REG_CONFIG 0x03 /* RO */ > > +#define REG_TEMP_HIGH_INT 0x07 /* RW */ > > +#define REG_TEMP_LOW_INT 0x08 /* RW */ > > +#define REG_CONFIG_WR 0x09 /* RW */ > > +#define REG_TEMP_DEC 0x10 /* RO */ > > +#define REG_TEMP_HIGH_DEC 0x13 /* RW */ > > +#define REG_TEMP_LOW_DEC 0x14 /* RW */ > > +#define REG_ALERT_CONFIG 0xBF /* RW */ > > + > > +#define STATUS_HIGH_ALERT BIT(4) > > +#define STATUS_LOW_ALERT BIT(3) > > +#define CONFIG_ALERT_MASK BIT(7) > > +#define ALARM_EN BIT(0) > > This is the part that could be shared in "include/hw/sensor/sbtsi.h". > Ack. > > > +/* The temperature stored are in units of 0.125 degrees. */ > > +#define TEMP_UNIT_IN_MILLIDEGREE 125 > > +#define LIMIT_LOW (10500) > > +#define LIMIT_HIGH (55125) > > Nitpicking again, _IN_MILLIDEGREE suffix for coherency? > > > +static uint32_t qmp_sbtsi_get_temperature(const char *id) > > +{ > > + QDict *response; > > + int ret; > > + > > + response = qmp("{ 'execute': 'qom-get', 'arguments': { 'path': %s, " > > + "'property': 'temperature' } }", id); > > If renamed earlier, here 'temperature_uC'. > > > + g_assert(qdict_haskey(response, "return")); > > + ret = (uint32_t)qdict_get_int(response, "return"); > > + qobject_unref(response); > > + return ret; > > +} > > + > > +static void qmp_sbtsi_set_temperature(const char *id, uint32_t value) > > +{ > > + QDict *response; > > + > > + response = qmp("{ 'execute': 'qom-set', 'arguments': { 'path': %s, " > > + "'property': 'temperature', 'value': %d } }", id, > value); > > + g_assert(qdict_haskey(response, "return")); > > + qobject_unref(response); > > +} > > Thanks, > > Phil. > v2 will come with the header split. I can split the qtests into a separate patch. Was your point because the patches are applied to different staging trees? Because I would think it ideal to have the qtests and the corresponding code applied together so that it's easy to know it's working. If this isn't standard, I can definitely split them. Patrick
