258 lines
7.2 KiB
C
258 lines
7.2 KiB
C
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// SPDX-License-Identifier: GPL-2.0+
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// Copyright IBM Corp 2019
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#include <linux/bitops.h>
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#include <linux/device.h>
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#include <linux/export.h>
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#include <linux/hwmon-sysfs.h>
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#include <linux/kernel.h>
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#include <linux/kstrtox.h>
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#include <linux/sysfs.h>
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#include "common.h"
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/* OCC status register */
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#define OCC_STAT_MASTER BIT(7)
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/* OCC extended status register */
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#define OCC_EXT_STAT_DVFS_OT BIT(7)
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#define OCC_EXT_STAT_DVFS_POWER BIT(6)
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#define OCC_EXT_STAT_MEM_THROTTLE BIT(5)
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#define OCC_EXT_STAT_QUICK_DROP BIT(4)
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#define OCC_EXT_STAT_DVFS_VDD BIT(3)
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#define OCC_EXT_STAT_GPU_THROTTLE GENMASK(2, 0)
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static ssize_t occ_active_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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int rc;
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bool active;
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struct occ *occ = dev_get_drvdata(dev);
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rc = kstrtobool(buf, &active);
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if (rc)
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return rc;
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rc = occ_active(occ, active);
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if (rc)
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return rc;
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return count;
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}
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static ssize_t occ_sysfs_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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int rc;
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int val = 0;
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struct occ *occ = dev_get_drvdata(dev);
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struct occ_poll_response_header *header;
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struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
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if (occ->active) {
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rc = occ_update_response(occ);
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if (rc)
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return rc;
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header = (struct occ_poll_response_header *)occ->resp.data;
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switch (sattr->index) {
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case 0:
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val = !!(header->status & OCC_STAT_MASTER);
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break;
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case 1:
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val = 1;
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break;
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case 2:
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val = !!(header->ext_status & OCC_EXT_STAT_DVFS_OT);
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break;
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case 3:
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val = !!(header->ext_status & OCC_EXT_STAT_DVFS_POWER);
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break;
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case 4:
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val = !!(header->ext_status &
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OCC_EXT_STAT_MEM_THROTTLE);
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break;
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case 5:
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val = !!(header->ext_status & OCC_EXT_STAT_QUICK_DROP);
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break;
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case 6:
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val = header->occ_state;
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break;
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case 7:
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if (header->status & OCC_STAT_MASTER)
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val = hweight8(header->occs_present);
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else
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val = 1;
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break;
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case 8:
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val = header->ips_status;
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break;
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case 9:
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val = header->mode;
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break;
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case 10:
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val = !!(header->ext_status & OCC_EXT_STAT_DVFS_VDD);
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break;
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case 11:
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val = header->ext_status & OCC_EXT_STAT_GPU_THROTTLE;
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break;
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default:
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return -EINVAL;
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}
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} else {
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if (sattr->index == 1)
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val = 0;
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else if (sattr->index <= 11)
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val = -ENODATA;
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else
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return -EINVAL;
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}
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return sysfs_emit(buf, "%d\n", val);
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}
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static ssize_t occ_error_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct occ *occ = dev_get_drvdata(dev);
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occ_update_response(occ);
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return sysfs_emit(buf, "%d\n", occ->error);
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}
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static SENSOR_DEVICE_ATTR(occ_master, 0444, occ_sysfs_show, NULL, 0);
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static SENSOR_DEVICE_ATTR(occ_active, 0644, occ_sysfs_show, occ_active_store,
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1);
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static SENSOR_DEVICE_ATTR(occ_dvfs_overtemp, 0444, occ_sysfs_show, NULL, 2);
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static SENSOR_DEVICE_ATTR(occ_dvfs_power, 0444, occ_sysfs_show, NULL, 3);
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static SENSOR_DEVICE_ATTR(occ_mem_throttle, 0444, occ_sysfs_show, NULL, 4);
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static SENSOR_DEVICE_ATTR(occ_quick_pwr_drop, 0444, occ_sysfs_show, NULL, 5);
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static SENSOR_DEVICE_ATTR(occ_state, 0444, occ_sysfs_show, NULL, 6);
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static SENSOR_DEVICE_ATTR(occs_present, 0444, occ_sysfs_show, NULL, 7);
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static SENSOR_DEVICE_ATTR(occ_ips_status, 0444, occ_sysfs_show, NULL, 8);
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static SENSOR_DEVICE_ATTR(occ_mode, 0444, occ_sysfs_show, NULL, 9);
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static SENSOR_DEVICE_ATTR(occ_dvfs_vdd, 0444, occ_sysfs_show, NULL, 10);
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static SENSOR_DEVICE_ATTR(occ_gpu_throttle, 0444, occ_sysfs_show, NULL, 11);
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static DEVICE_ATTR_RO(occ_error);
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static struct attribute *occ_attributes[] = {
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&sensor_dev_attr_occ_master.dev_attr.attr,
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&sensor_dev_attr_occ_active.dev_attr.attr,
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&sensor_dev_attr_occ_dvfs_overtemp.dev_attr.attr,
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&sensor_dev_attr_occ_dvfs_power.dev_attr.attr,
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&sensor_dev_attr_occ_mem_throttle.dev_attr.attr,
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&sensor_dev_attr_occ_quick_pwr_drop.dev_attr.attr,
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&sensor_dev_attr_occ_state.dev_attr.attr,
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&sensor_dev_attr_occs_present.dev_attr.attr,
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&sensor_dev_attr_occ_ips_status.dev_attr.attr,
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&sensor_dev_attr_occ_mode.dev_attr.attr,
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&sensor_dev_attr_occ_dvfs_vdd.dev_attr.attr,
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&sensor_dev_attr_occ_gpu_throttle.dev_attr.attr,
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&dev_attr_occ_error.attr,
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NULL
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};
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static const struct attribute_group occ_sysfs = {
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.attrs = occ_attributes,
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};
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void occ_sysfs_poll_done(struct occ *occ)
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{
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const char *name;
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struct occ_poll_response_header *header =
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(struct occ_poll_response_header *)occ->resp.data;
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/*
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* On the first poll response, we haven't yet created the sysfs
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* attributes, so don't make any notify calls.
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*/
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if (!occ->active)
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goto done;
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if ((header->status & OCC_STAT_MASTER) !=
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(occ->prev_stat & OCC_STAT_MASTER)) {
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name = sensor_dev_attr_occ_master.dev_attr.attr.name;
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sysfs_notify(&occ->bus_dev->kobj, NULL, name);
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}
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if ((header->ext_status & OCC_EXT_STAT_DVFS_OT) !=
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(occ->prev_ext_stat & OCC_EXT_STAT_DVFS_OT)) {
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name = sensor_dev_attr_occ_dvfs_overtemp.dev_attr.attr.name;
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sysfs_notify(&occ->bus_dev->kobj, NULL, name);
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}
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if ((header->ext_status & OCC_EXT_STAT_DVFS_POWER) !=
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(occ->prev_ext_stat & OCC_EXT_STAT_DVFS_POWER)) {
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name = sensor_dev_attr_occ_dvfs_power.dev_attr.attr.name;
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sysfs_notify(&occ->bus_dev->kobj, NULL, name);
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}
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if ((header->ext_status & OCC_EXT_STAT_MEM_THROTTLE) !=
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(occ->prev_ext_stat & OCC_EXT_STAT_MEM_THROTTLE)) {
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name = sensor_dev_attr_occ_mem_throttle.dev_attr.attr.name;
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sysfs_notify(&occ->bus_dev->kobj, NULL, name);
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}
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if ((header->ext_status & OCC_EXT_STAT_QUICK_DROP) !=
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(occ->prev_ext_stat & OCC_EXT_STAT_QUICK_DROP)) {
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name = sensor_dev_attr_occ_quick_pwr_drop.dev_attr.attr.name;
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sysfs_notify(&occ->bus_dev->kobj, NULL, name);
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}
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if ((header->ext_status & OCC_EXT_STAT_DVFS_VDD) !=
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(occ->prev_ext_stat & OCC_EXT_STAT_DVFS_VDD)) {
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name = sensor_dev_attr_occ_dvfs_vdd.dev_attr.attr.name;
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sysfs_notify(&occ->bus_dev->kobj, NULL, name);
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}
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if ((header->ext_status & OCC_EXT_STAT_GPU_THROTTLE) !=
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(occ->prev_ext_stat & OCC_EXT_STAT_GPU_THROTTLE)) {
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name = sensor_dev_attr_occ_gpu_throttle.dev_attr.attr.name;
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sysfs_notify(&occ->bus_dev->kobj, NULL, name);
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}
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if ((header->status & OCC_STAT_MASTER) &&
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header->occs_present != occ->prev_occs_present) {
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name = sensor_dev_attr_occs_present.dev_attr.attr.name;
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sysfs_notify(&occ->bus_dev->kobj, NULL, name);
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}
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if (header->ips_status != occ->prev_ips_status) {
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name = sensor_dev_attr_occ_ips_status.dev_attr.attr.name;
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sysfs_notify(&occ->bus_dev->kobj, NULL, name);
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}
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if (header->mode != occ->prev_mode) {
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name = sensor_dev_attr_occ_mode.dev_attr.attr.name;
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sysfs_notify(&occ->bus_dev->kobj, NULL, name);
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}
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if (occ->error && occ->error != occ->prev_error) {
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name = dev_attr_occ_error.attr.name;
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sysfs_notify(&occ->bus_dev->kobj, NULL, name);
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}
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/* no notifications for OCC state; doesn't indicate error condition */
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done:
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occ->prev_error = occ->error;
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occ->prev_stat = header->status;
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occ->prev_ext_stat = header->ext_status;
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occ->prev_occs_present = header->occs_present;
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occ->prev_ips_status = header->ips_status;
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occ->prev_mode = header->mode;
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}
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int occ_setup_sysfs(struct occ *occ)
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{
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return sysfs_create_group(&occ->bus_dev->kobj, &occ_sysfs);
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}
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void occ_shutdown_sysfs(struct occ *occ)
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{
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sysfs_remove_group(&occ->bus_dev->kobj, &occ_sysfs);
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}
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