1202 lines
28 KiB
C
1202 lines
28 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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// Copyright IBM Corp 2019
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#include <linux/device.h>
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#include <linux/export.h>
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#include <linux/hwmon.h>
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#include <linux/hwmon-sysfs.h>
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#include <linux/jiffies.h>
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#include <linux/kernel.h>
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#include <linux/math64.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/sysfs.h>
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#include <asm/unaligned.h>
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#include "common.h"
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#define EXTN_FLAG_SENSOR_ID BIT(7)
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#define OCC_ERROR_COUNT_THRESHOLD 2 /* required by OCC spec */
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#define OCC_STATE_SAFE 4
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#define OCC_SAFE_TIMEOUT msecs_to_jiffies(60000) /* 1 min */
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#define OCC_UPDATE_FREQUENCY msecs_to_jiffies(1000)
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#define OCC_TEMP_SENSOR_FAULT 0xFF
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#define OCC_FRU_TYPE_VRM 3
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/* OCC sensor type and version definitions */
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struct temp_sensor_1 {
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u16 sensor_id;
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u16 value;
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} __packed;
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struct temp_sensor_2 {
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u32 sensor_id;
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u8 fru_type;
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u8 value;
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} __packed;
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struct temp_sensor_10 {
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u32 sensor_id;
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u8 fru_type;
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u8 value;
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u8 throttle;
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u8 reserved;
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} __packed;
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struct freq_sensor_1 {
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u16 sensor_id;
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u16 value;
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} __packed;
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struct freq_sensor_2 {
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u32 sensor_id;
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u16 value;
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} __packed;
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struct power_sensor_1 {
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u16 sensor_id;
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u32 update_tag;
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u32 accumulator;
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u16 value;
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} __packed;
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struct power_sensor_2 {
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u32 sensor_id;
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u8 function_id;
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u8 apss_channel;
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u16 reserved;
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u32 update_tag;
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u64 accumulator;
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u16 value;
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} __packed;
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struct power_sensor_data {
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u16 value;
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u32 update_tag;
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u64 accumulator;
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} __packed;
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struct power_sensor_data_and_time {
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u16 update_time;
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u16 value;
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u32 update_tag;
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u64 accumulator;
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} __packed;
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struct power_sensor_a0 {
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u32 sensor_id;
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struct power_sensor_data_and_time system;
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u32 reserved;
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struct power_sensor_data_and_time proc;
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struct power_sensor_data vdd;
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struct power_sensor_data vdn;
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} __packed;
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struct caps_sensor_2 {
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u16 cap;
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u16 system_power;
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u16 n_cap;
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u16 max;
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u16 min;
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u16 user;
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u8 user_source;
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} __packed;
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struct caps_sensor_3 {
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u16 cap;
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u16 system_power;
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u16 n_cap;
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u16 max;
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u16 hard_min;
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u16 soft_min;
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u16 user;
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u8 user_source;
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} __packed;
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struct extended_sensor {
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union {
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u8 name[4];
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u32 sensor_id;
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};
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u8 flags;
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u8 reserved;
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u8 data[6];
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} __packed;
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static int occ_poll(struct occ *occ)
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{
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int rc;
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u8 cmd[7];
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struct occ_poll_response_header *header;
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/* big endian */
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cmd[0] = 0; /* sequence number */
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cmd[1] = 0; /* cmd type */
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cmd[2] = 0; /* data length msb */
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cmd[3] = 1; /* data length lsb */
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cmd[4] = occ->poll_cmd_data; /* data */
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cmd[5] = 0; /* checksum msb */
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cmd[6] = 0; /* checksum lsb */
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/* mutex should already be locked if necessary */
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rc = occ->send_cmd(occ, cmd, sizeof(cmd), &occ->resp, sizeof(occ->resp));
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if (rc) {
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occ->last_error = rc;
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if (occ->error_count++ > OCC_ERROR_COUNT_THRESHOLD)
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occ->error = rc;
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goto done;
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}
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/* clear error since communication was successful */
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occ->error_count = 0;
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occ->last_error = 0;
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occ->error = 0;
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/* check for safe state */
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header = (struct occ_poll_response_header *)occ->resp.data;
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if (header->occ_state == OCC_STATE_SAFE) {
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if (occ->last_safe) {
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if (time_after(jiffies,
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occ->last_safe + OCC_SAFE_TIMEOUT))
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occ->error = -EHOSTDOWN;
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} else {
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occ->last_safe = jiffies;
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}
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} else {
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occ->last_safe = 0;
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}
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done:
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occ_sysfs_poll_done(occ);
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return rc;
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}
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static int occ_set_user_power_cap(struct occ *occ, u16 user_power_cap)
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{
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int rc;
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u8 cmd[8];
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u8 resp[8];
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__be16 user_power_cap_be = cpu_to_be16(user_power_cap);
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cmd[0] = 0; /* sequence number */
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cmd[1] = 0x22; /* cmd type */
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cmd[2] = 0; /* data length msb */
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cmd[3] = 2; /* data length lsb */
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memcpy(&cmd[4], &user_power_cap_be, 2);
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cmd[6] = 0; /* checksum msb */
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cmd[7] = 0; /* checksum lsb */
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rc = mutex_lock_interruptible(&occ->lock);
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if (rc)
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return rc;
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rc = occ->send_cmd(occ, cmd, sizeof(cmd), resp, sizeof(resp));
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mutex_unlock(&occ->lock);
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return rc;
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}
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int occ_update_response(struct occ *occ)
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{
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int rc = mutex_lock_interruptible(&occ->lock);
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if (rc)
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return rc;
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/* limit the maximum rate of polling the OCC */
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if (time_after(jiffies, occ->next_update)) {
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rc = occ_poll(occ);
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occ->next_update = jiffies + OCC_UPDATE_FREQUENCY;
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} else {
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rc = occ->last_error;
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}
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mutex_unlock(&occ->lock);
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return rc;
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}
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static ssize_t occ_show_temp_1(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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u32 val = 0;
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struct temp_sensor_1 *temp;
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struct occ *occ = dev_get_drvdata(dev);
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struct occ_sensors *sensors = &occ->sensors;
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struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
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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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temp = ((struct temp_sensor_1 *)sensors->temp.data) + sattr->index;
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switch (sattr->nr) {
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case 0:
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val = get_unaligned_be16(&temp->sensor_id);
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break;
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case 1:
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/*
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* If a sensor reading has expired and couldn't be refreshed,
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* OCC returns 0xFFFF for that sensor.
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*/
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if (temp->value == 0xFFFF)
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return -EREMOTEIO;
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val = get_unaligned_be16(&temp->value) * 1000;
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break;
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default:
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return -EINVAL;
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}
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return sysfs_emit(buf, "%u\n", val);
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}
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static ssize_t occ_show_temp_2(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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u32 val = 0;
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struct temp_sensor_2 *temp;
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struct occ *occ = dev_get_drvdata(dev);
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struct occ_sensors *sensors = &occ->sensors;
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struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
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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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temp = ((struct temp_sensor_2 *)sensors->temp.data) + sattr->index;
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switch (sattr->nr) {
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case 0:
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val = get_unaligned_be32(&temp->sensor_id);
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break;
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case 1:
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val = temp->value;
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if (val == OCC_TEMP_SENSOR_FAULT)
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return -EREMOTEIO;
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/*
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* VRM doesn't return temperature, only alarm bit. This
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* attribute maps to tempX_alarm instead of tempX_input for
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* VRM
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*/
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if (temp->fru_type != OCC_FRU_TYPE_VRM) {
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/* sensor not ready */
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if (val == 0)
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return -EAGAIN;
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val *= 1000;
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}
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break;
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case 2:
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val = temp->fru_type;
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break;
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case 3:
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val = temp->value == OCC_TEMP_SENSOR_FAULT;
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break;
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default:
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return -EINVAL;
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}
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return sysfs_emit(buf, "%u\n", val);
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}
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static ssize_t occ_show_temp_10(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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u32 val = 0;
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struct temp_sensor_10 *temp;
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struct occ *occ = dev_get_drvdata(dev);
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struct occ_sensors *sensors = &occ->sensors;
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struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
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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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temp = ((struct temp_sensor_10 *)sensors->temp.data) + sattr->index;
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switch (sattr->nr) {
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case 0:
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val = get_unaligned_be32(&temp->sensor_id);
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break;
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case 1:
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val = temp->value;
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if (val == OCC_TEMP_SENSOR_FAULT)
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return -EREMOTEIO;
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/* sensor not ready */
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if (val == 0)
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return -EAGAIN;
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val *= 1000;
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break;
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case 2:
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val = temp->fru_type;
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break;
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case 3:
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val = temp->value == OCC_TEMP_SENSOR_FAULT;
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break;
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case 4:
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val = temp->throttle * 1000;
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break;
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default:
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return -EINVAL;
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}
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return sysfs_emit(buf, "%u\n", val);
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}
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static ssize_t occ_show_freq_1(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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u16 val = 0;
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struct freq_sensor_1 *freq;
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struct occ *occ = dev_get_drvdata(dev);
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struct occ_sensors *sensors = &occ->sensors;
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struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
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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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freq = ((struct freq_sensor_1 *)sensors->freq.data) + sattr->index;
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switch (sattr->nr) {
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case 0:
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val = get_unaligned_be16(&freq->sensor_id);
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break;
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case 1:
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val = get_unaligned_be16(&freq->value);
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break;
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default:
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return -EINVAL;
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}
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return sysfs_emit(buf, "%u\n", val);
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}
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static ssize_t occ_show_freq_2(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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u32 val = 0;
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struct freq_sensor_2 *freq;
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struct occ *occ = dev_get_drvdata(dev);
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struct occ_sensors *sensors = &occ->sensors;
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struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
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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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freq = ((struct freq_sensor_2 *)sensors->freq.data) + sattr->index;
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switch (sattr->nr) {
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case 0:
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val = get_unaligned_be32(&freq->sensor_id);
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break;
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case 1:
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val = get_unaligned_be16(&freq->value);
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break;
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default:
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return -EINVAL;
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}
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return sysfs_emit(buf, "%u\n", val);
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}
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static ssize_t occ_show_power_1(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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u64 val = 0;
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struct power_sensor_1 *power;
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struct occ *occ = dev_get_drvdata(dev);
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struct occ_sensors *sensors = &occ->sensors;
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struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
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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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power = ((struct power_sensor_1 *)sensors->power.data) + sattr->index;
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switch (sattr->nr) {
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case 0:
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val = get_unaligned_be16(&power->sensor_id);
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break;
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case 1:
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val = get_unaligned_be32(&power->accumulator) /
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get_unaligned_be32(&power->update_tag);
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val *= 1000000ULL;
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break;
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case 2:
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val = (u64)get_unaligned_be32(&power->update_tag) *
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occ->powr_sample_time_us;
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break;
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case 3:
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val = get_unaligned_be16(&power->value) * 1000000ULL;
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break;
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default:
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return -EINVAL;
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}
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return sysfs_emit(buf, "%llu\n", val);
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}
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static u64 occ_get_powr_avg(u64 *accum, u32 *samples)
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{
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u64 divisor = get_unaligned_be32(samples);
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return (divisor == 0) ? 0 :
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div64_u64(get_unaligned_be64(accum) * 1000000ULL, divisor);
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}
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static ssize_t occ_show_power_2(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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u64 val = 0;
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struct power_sensor_2 *power;
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struct occ *occ = dev_get_drvdata(dev);
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struct occ_sensors *sensors = &occ->sensors;
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struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
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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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power = ((struct power_sensor_2 *)sensors->power.data) + sattr->index;
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switch (sattr->nr) {
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case 0:
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return sysfs_emit(buf, "%u_%u_%u\n",
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get_unaligned_be32(&power->sensor_id),
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power->function_id, power->apss_channel);
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case 1:
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val = occ_get_powr_avg(&power->accumulator,
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&power->update_tag);
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break;
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case 2:
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val = (u64)get_unaligned_be32(&power->update_tag) *
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occ->powr_sample_time_us;
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break;
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case 3:
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val = get_unaligned_be16(&power->value) * 1000000ULL;
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break;
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default:
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return -EINVAL;
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}
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return sysfs_emit(buf, "%llu\n", val);
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}
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static ssize_t occ_show_power_a0(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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u64 val = 0;
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struct power_sensor_a0 *power;
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struct occ *occ = dev_get_drvdata(dev);
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struct occ_sensors *sensors = &occ->sensors;
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struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
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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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power = ((struct power_sensor_a0 *)sensors->power.data) + sattr->index;
|
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|
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switch (sattr->nr) {
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case 0:
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return sysfs_emit(buf, "%u_system\n",
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get_unaligned_be32(&power->sensor_id));
|
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case 1:
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val = occ_get_powr_avg(&power->system.accumulator,
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&power->system.update_tag);
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break;
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case 2:
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val = (u64)get_unaligned_be32(&power->system.update_tag) *
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occ->powr_sample_time_us;
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break;
|
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case 3:
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val = get_unaligned_be16(&power->system.value) * 1000000ULL;
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break;
|
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case 4:
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return sysfs_emit(buf, "%u_proc\n",
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get_unaligned_be32(&power->sensor_id));
|
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case 5:
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val = occ_get_powr_avg(&power->proc.accumulator,
|
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&power->proc.update_tag);
|
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break;
|
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case 6:
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val = (u64)get_unaligned_be32(&power->proc.update_tag) *
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occ->powr_sample_time_us;
|
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break;
|
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case 7:
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val = get_unaligned_be16(&power->proc.value) * 1000000ULL;
|
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break;
|
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case 8:
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return sysfs_emit(buf, "%u_vdd\n",
|
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get_unaligned_be32(&power->sensor_id));
|
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case 9:
|
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val = occ_get_powr_avg(&power->vdd.accumulator,
|
|
&power->vdd.update_tag);
|
|
break;
|
|
case 10:
|
|
val = (u64)get_unaligned_be32(&power->vdd.update_tag) *
|
|
occ->powr_sample_time_us;
|
|
break;
|
|
case 11:
|
|
val = get_unaligned_be16(&power->vdd.value) * 1000000ULL;
|
|
break;
|
|
case 12:
|
|
return sysfs_emit(buf, "%u_vdn\n",
|
|
get_unaligned_be32(&power->sensor_id));
|
|
case 13:
|
|
val = occ_get_powr_avg(&power->vdn.accumulator,
|
|
&power->vdn.update_tag);
|
|
break;
|
|
case 14:
|
|
val = (u64)get_unaligned_be32(&power->vdn.update_tag) *
|
|
occ->powr_sample_time_us;
|
|
break;
|
|
case 15:
|
|
val = get_unaligned_be16(&power->vdn.value) * 1000000ULL;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return sysfs_emit(buf, "%llu\n", val);
|
|
}
|
|
|
|
static ssize_t occ_show_caps_1_2(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
int rc;
|
|
u64 val = 0;
|
|
struct caps_sensor_2 *caps;
|
|
struct occ *occ = dev_get_drvdata(dev);
|
|
struct occ_sensors *sensors = &occ->sensors;
|
|
struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
|
|
|
|
rc = occ_update_response(occ);
|
|
if (rc)
|
|
return rc;
|
|
|
|
caps = ((struct caps_sensor_2 *)sensors->caps.data) + sattr->index;
|
|
|
|
switch (sattr->nr) {
|
|
case 0:
|
|
return sysfs_emit(buf, "system\n");
|
|
case 1:
|
|
val = get_unaligned_be16(&caps->cap) * 1000000ULL;
|
|
break;
|
|
case 2:
|
|
val = get_unaligned_be16(&caps->system_power) * 1000000ULL;
|
|
break;
|
|
case 3:
|
|
val = get_unaligned_be16(&caps->n_cap) * 1000000ULL;
|
|
break;
|
|
case 4:
|
|
val = get_unaligned_be16(&caps->max) * 1000000ULL;
|
|
break;
|
|
case 5:
|
|
val = get_unaligned_be16(&caps->min) * 1000000ULL;
|
|
break;
|
|
case 6:
|
|
val = get_unaligned_be16(&caps->user) * 1000000ULL;
|
|
break;
|
|
case 7:
|
|
if (occ->sensors.caps.version == 1)
|
|
return -EINVAL;
|
|
|
|
val = caps->user_source;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return sysfs_emit(buf, "%llu\n", val);
|
|
}
|
|
|
|
static ssize_t occ_show_caps_3(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
int rc;
|
|
u64 val = 0;
|
|
struct caps_sensor_3 *caps;
|
|
struct occ *occ = dev_get_drvdata(dev);
|
|
struct occ_sensors *sensors = &occ->sensors;
|
|
struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
|
|
|
|
rc = occ_update_response(occ);
|
|
if (rc)
|
|
return rc;
|
|
|
|
caps = ((struct caps_sensor_3 *)sensors->caps.data) + sattr->index;
|
|
|
|
switch (sattr->nr) {
|
|
case 0:
|
|
return sysfs_emit(buf, "system\n");
|
|
case 1:
|
|
val = get_unaligned_be16(&caps->cap) * 1000000ULL;
|
|
break;
|
|
case 2:
|
|
val = get_unaligned_be16(&caps->system_power) * 1000000ULL;
|
|
break;
|
|
case 3:
|
|
val = get_unaligned_be16(&caps->n_cap) * 1000000ULL;
|
|
break;
|
|
case 4:
|
|
val = get_unaligned_be16(&caps->max) * 1000000ULL;
|
|
break;
|
|
case 5:
|
|
val = get_unaligned_be16(&caps->hard_min) * 1000000ULL;
|
|
break;
|
|
case 6:
|
|
val = get_unaligned_be16(&caps->user) * 1000000ULL;
|
|
break;
|
|
case 7:
|
|
val = caps->user_source;
|
|
break;
|
|
case 8:
|
|
val = get_unaligned_be16(&caps->soft_min) * 1000000ULL;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return sysfs_emit(buf, "%llu\n", val);
|
|
}
|
|
|
|
static ssize_t occ_store_caps_user(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
int rc;
|
|
u16 user_power_cap;
|
|
unsigned long long value;
|
|
struct occ *occ = dev_get_drvdata(dev);
|
|
|
|
rc = kstrtoull(buf, 0, &value);
|
|
if (rc)
|
|
return rc;
|
|
|
|
user_power_cap = div64_u64(value, 1000000ULL); /* microwatt to watt */
|
|
|
|
rc = occ_set_user_power_cap(occ, user_power_cap);
|
|
if (rc)
|
|
return rc;
|
|
|
|
return count;
|
|
}
|
|
|
|
static ssize_t occ_show_extended(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
int rc;
|
|
struct extended_sensor *extn;
|
|
struct occ *occ = dev_get_drvdata(dev);
|
|
struct occ_sensors *sensors = &occ->sensors;
|
|
struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
|
|
|
|
rc = occ_update_response(occ);
|
|
if (rc)
|
|
return rc;
|
|
|
|
extn = ((struct extended_sensor *)sensors->extended.data) +
|
|
sattr->index;
|
|
|
|
switch (sattr->nr) {
|
|
case 0:
|
|
if (extn->flags & EXTN_FLAG_SENSOR_ID) {
|
|
rc = sysfs_emit(buf, "%u",
|
|
get_unaligned_be32(&extn->sensor_id));
|
|
} else {
|
|
rc = sysfs_emit(buf, "%02x%02x%02x%02x\n",
|
|
extn->name[0], extn->name[1],
|
|
extn->name[2], extn->name[3]);
|
|
}
|
|
break;
|
|
case 1:
|
|
rc = sysfs_emit(buf, "%02x\n", extn->flags);
|
|
break;
|
|
case 2:
|
|
rc = sysfs_emit(buf, "%02x%02x%02x%02x%02x%02x\n",
|
|
extn->data[0], extn->data[1], extn->data[2],
|
|
extn->data[3], extn->data[4], extn->data[5]);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* Some helper macros to make it easier to define an occ_attribute. Since these
|
|
* are dynamically allocated, we shouldn't use the existing kernel macros which
|
|
* stringify the name argument.
|
|
*/
|
|
#define ATTR_OCC(_name, _mode, _show, _store) { \
|
|
.attr = { \
|
|
.name = _name, \
|
|
.mode = VERIFY_OCTAL_PERMISSIONS(_mode), \
|
|
}, \
|
|
.show = _show, \
|
|
.store = _store, \
|
|
}
|
|
|
|
#define SENSOR_ATTR_OCC(_name, _mode, _show, _store, _nr, _index) { \
|
|
.dev_attr = ATTR_OCC(_name, _mode, _show, _store), \
|
|
.index = _index, \
|
|
.nr = _nr, \
|
|
}
|
|
|
|
#define OCC_INIT_ATTR(_name, _mode, _show, _store, _nr, _index) \
|
|
((struct sensor_device_attribute_2) \
|
|
SENSOR_ATTR_OCC(_name, _mode, _show, _store, _nr, _index))
|
|
|
|
/*
|
|
* Allocate and instatiate sensor_device_attribute_2s. It's most efficient to
|
|
* use our own instead of the built-in hwmon attribute types.
|
|
*/
|
|
static int occ_setup_sensor_attrs(struct occ *occ)
|
|
{
|
|
unsigned int i, s, num_attrs = 0;
|
|
struct device *dev = occ->bus_dev;
|
|
struct occ_sensors *sensors = &occ->sensors;
|
|
struct occ_attribute *attr;
|
|
struct temp_sensor_2 *temp;
|
|
ssize_t (*show_temp)(struct device *, struct device_attribute *,
|
|
char *) = occ_show_temp_1;
|
|
ssize_t (*show_freq)(struct device *, struct device_attribute *,
|
|
char *) = occ_show_freq_1;
|
|
ssize_t (*show_power)(struct device *, struct device_attribute *,
|
|
char *) = occ_show_power_1;
|
|
ssize_t (*show_caps)(struct device *, struct device_attribute *,
|
|
char *) = occ_show_caps_1_2;
|
|
|
|
switch (sensors->temp.version) {
|
|
case 1:
|
|
num_attrs += (sensors->temp.num_sensors * 2);
|
|
break;
|
|
case 2:
|
|
num_attrs += (sensors->temp.num_sensors * 4);
|
|
show_temp = occ_show_temp_2;
|
|
break;
|
|
case 0x10:
|
|
num_attrs += (sensors->temp.num_sensors * 5);
|
|
show_temp = occ_show_temp_10;
|
|
break;
|
|
default:
|
|
sensors->temp.num_sensors = 0;
|
|
}
|
|
|
|
switch (sensors->freq.version) {
|
|
case 2:
|
|
show_freq = occ_show_freq_2;
|
|
fallthrough;
|
|
case 1:
|
|
num_attrs += (sensors->freq.num_sensors * 2);
|
|
break;
|
|
default:
|
|
sensors->freq.num_sensors = 0;
|
|
}
|
|
|
|
switch (sensors->power.version) {
|
|
case 2:
|
|
show_power = occ_show_power_2;
|
|
fallthrough;
|
|
case 1:
|
|
num_attrs += (sensors->power.num_sensors * 4);
|
|
break;
|
|
case 0xA0:
|
|
num_attrs += (sensors->power.num_sensors * 16);
|
|
show_power = occ_show_power_a0;
|
|
break;
|
|
default:
|
|
sensors->power.num_sensors = 0;
|
|
}
|
|
|
|
switch (sensors->caps.version) {
|
|
case 1:
|
|
num_attrs += (sensors->caps.num_sensors * 7);
|
|
break;
|
|
case 2:
|
|
num_attrs += (sensors->caps.num_sensors * 8);
|
|
break;
|
|
case 3:
|
|
show_caps = occ_show_caps_3;
|
|
num_attrs += (sensors->caps.num_sensors * 9);
|
|
break;
|
|
default:
|
|
sensors->caps.num_sensors = 0;
|
|
}
|
|
|
|
switch (sensors->extended.version) {
|
|
case 1:
|
|
num_attrs += (sensors->extended.num_sensors * 3);
|
|
break;
|
|
default:
|
|
sensors->extended.num_sensors = 0;
|
|
}
|
|
|
|
occ->attrs = devm_kzalloc(dev, sizeof(*occ->attrs) * num_attrs,
|
|
GFP_KERNEL);
|
|
if (!occ->attrs)
|
|
return -ENOMEM;
|
|
|
|
/* null-terminated list */
|
|
occ->group.attrs = devm_kzalloc(dev, sizeof(*occ->group.attrs) *
|
|
num_attrs + 1, GFP_KERNEL);
|
|
if (!occ->group.attrs)
|
|
return -ENOMEM;
|
|
|
|
attr = occ->attrs;
|
|
|
|
for (i = 0; i < sensors->temp.num_sensors; ++i) {
|
|
s = i + 1;
|
|
temp = ((struct temp_sensor_2 *)sensors->temp.data) + i;
|
|
|
|
snprintf(attr->name, sizeof(attr->name), "temp%d_label", s);
|
|
attr->sensor = OCC_INIT_ATTR(attr->name, 0444, show_temp, NULL,
|
|
0, i);
|
|
attr++;
|
|
|
|
if (sensors->temp.version == 2 &&
|
|
temp->fru_type == OCC_FRU_TYPE_VRM) {
|
|
snprintf(attr->name, sizeof(attr->name),
|
|
"temp%d_alarm", s);
|
|
} else {
|
|
snprintf(attr->name, sizeof(attr->name),
|
|
"temp%d_input", s);
|
|
}
|
|
|
|
attr->sensor = OCC_INIT_ATTR(attr->name, 0444, show_temp, NULL,
|
|
1, i);
|
|
attr++;
|
|
|
|
if (sensors->temp.version > 1) {
|
|
snprintf(attr->name, sizeof(attr->name),
|
|
"temp%d_fru_type", s);
|
|
attr->sensor = OCC_INIT_ATTR(attr->name, 0444,
|
|
show_temp, NULL, 2, i);
|
|
attr++;
|
|
|
|
snprintf(attr->name, sizeof(attr->name),
|
|
"temp%d_fault", s);
|
|
attr->sensor = OCC_INIT_ATTR(attr->name, 0444,
|
|
show_temp, NULL, 3, i);
|
|
attr++;
|
|
|
|
if (sensors->temp.version == 0x10) {
|
|
snprintf(attr->name, sizeof(attr->name),
|
|
"temp%d_max", s);
|
|
attr->sensor = OCC_INIT_ATTR(attr->name, 0444,
|
|
show_temp, NULL,
|
|
4, i);
|
|
attr++;
|
|
}
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < sensors->freq.num_sensors; ++i) {
|
|
s = i + 1;
|
|
|
|
snprintf(attr->name, sizeof(attr->name), "freq%d_label", s);
|
|
attr->sensor = OCC_INIT_ATTR(attr->name, 0444, show_freq, NULL,
|
|
0, i);
|
|
attr++;
|
|
|
|
snprintf(attr->name, sizeof(attr->name), "freq%d_input", s);
|
|
attr->sensor = OCC_INIT_ATTR(attr->name, 0444, show_freq, NULL,
|
|
1, i);
|
|
attr++;
|
|
}
|
|
|
|
if (sensors->power.version == 0xA0) {
|
|
/*
|
|
* Special case for many-attribute power sensor. Split it into
|
|
* a sensor number per power type, emulating several sensors.
|
|
*/
|
|
for (i = 0; i < sensors->power.num_sensors; ++i) {
|
|
unsigned int j;
|
|
unsigned int nr = 0;
|
|
|
|
s = (i * 4) + 1;
|
|
|
|
for (j = 0; j < 4; ++j) {
|
|
snprintf(attr->name, sizeof(attr->name),
|
|
"power%d_label", s);
|
|
attr->sensor = OCC_INIT_ATTR(attr->name, 0444,
|
|
show_power, NULL,
|
|
nr++, i);
|
|
attr++;
|
|
|
|
snprintf(attr->name, sizeof(attr->name),
|
|
"power%d_average", s);
|
|
attr->sensor = OCC_INIT_ATTR(attr->name, 0444,
|
|
show_power, NULL,
|
|
nr++, i);
|
|
attr++;
|
|
|
|
snprintf(attr->name, sizeof(attr->name),
|
|
"power%d_average_interval", s);
|
|
attr->sensor = OCC_INIT_ATTR(attr->name, 0444,
|
|
show_power, NULL,
|
|
nr++, i);
|
|
attr++;
|
|
|
|
snprintf(attr->name, sizeof(attr->name),
|
|
"power%d_input", s);
|
|
attr->sensor = OCC_INIT_ATTR(attr->name, 0444,
|
|
show_power, NULL,
|
|
nr++, i);
|
|
attr++;
|
|
|
|
s++;
|
|
}
|
|
}
|
|
|
|
s = (sensors->power.num_sensors * 4) + 1;
|
|
} else {
|
|
for (i = 0; i < sensors->power.num_sensors; ++i) {
|
|
s = i + 1;
|
|
|
|
snprintf(attr->name, sizeof(attr->name),
|
|
"power%d_label", s);
|
|
attr->sensor = OCC_INIT_ATTR(attr->name, 0444,
|
|
show_power, NULL, 0, i);
|
|
attr++;
|
|
|
|
snprintf(attr->name, sizeof(attr->name),
|
|
"power%d_average", s);
|
|
attr->sensor = OCC_INIT_ATTR(attr->name, 0444,
|
|
show_power, NULL, 1, i);
|
|
attr++;
|
|
|
|
snprintf(attr->name, sizeof(attr->name),
|
|
"power%d_average_interval", s);
|
|
attr->sensor = OCC_INIT_ATTR(attr->name, 0444,
|
|
show_power, NULL, 2, i);
|
|
attr++;
|
|
|
|
snprintf(attr->name, sizeof(attr->name),
|
|
"power%d_input", s);
|
|
attr->sensor = OCC_INIT_ATTR(attr->name, 0444,
|
|
show_power, NULL, 3, i);
|
|
attr++;
|
|
}
|
|
|
|
s = sensors->power.num_sensors + 1;
|
|
}
|
|
|
|
if (sensors->caps.num_sensors >= 1) {
|
|
snprintf(attr->name, sizeof(attr->name), "power%d_label", s);
|
|
attr->sensor = OCC_INIT_ATTR(attr->name, 0444, show_caps, NULL,
|
|
0, 0);
|
|
attr++;
|
|
|
|
snprintf(attr->name, sizeof(attr->name), "power%d_cap", s);
|
|
attr->sensor = OCC_INIT_ATTR(attr->name, 0444, show_caps, NULL,
|
|
1, 0);
|
|
attr++;
|
|
|
|
snprintf(attr->name, sizeof(attr->name), "power%d_input", s);
|
|
attr->sensor = OCC_INIT_ATTR(attr->name, 0444, show_caps, NULL,
|
|
2, 0);
|
|
attr++;
|
|
|
|
snprintf(attr->name, sizeof(attr->name),
|
|
"power%d_cap_not_redundant", s);
|
|
attr->sensor = OCC_INIT_ATTR(attr->name, 0444, show_caps, NULL,
|
|
3, 0);
|
|
attr++;
|
|
|
|
snprintf(attr->name, sizeof(attr->name), "power%d_cap_max", s);
|
|
attr->sensor = OCC_INIT_ATTR(attr->name, 0444, show_caps, NULL,
|
|
4, 0);
|
|
attr++;
|
|
|
|
snprintf(attr->name, sizeof(attr->name), "power%d_cap_min", s);
|
|
attr->sensor = OCC_INIT_ATTR(attr->name, 0444, show_caps, NULL,
|
|
5, 0);
|
|
attr++;
|
|
|
|
snprintf(attr->name, sizeof(attr->name), "power%d_cap_user",
|
|
s);
|
|
attr->sensor = OCC_INIT_ATTR(attr->name, 0644, show_caps,
|
|
occ_store_caps_user, 6, 0);
|
|
attr++;
|
|
|
|
if (sensors->caps.version > 1) {
|
|
snprintf(attr->name, sizeof(attr->name),
|
|
"power%d_cap_user_source", s);
|
|
attr->sensor = OCC_INIT_ATTR(attr->name, 0444,
|
|
show_caps, NULL, 7, 0);
|
|
attr++;
|
|
|
|
if (sensors->caps.version > 2) {
|
|
snprintf(attr->name, sizeof(attr->name),
|
|
"power%d_cap_min_soft", s);
|
|
attr->sensor = OCC_INIT_ATTR(attr->name, 0444,
|
|
show_caps, NULL,
|
|
8, 0);
|
|
attr++;
|
|
}
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < sensors->extended.num_sensors; ++i) {
|
|
s = i + 1;
|
|
|
|
snprintf(attr->name, sizeof(attr->name), "extn%d_label", s);
|
|
attr->sensor = OCC_INIT_ATTR(attr->name, 0444,
|
|
occ_show_extended, NULL, 0, i);
|
|
attr++;
|
|
|
|
snprintf(attr->name, sizeof(attr->name), "extn%d_flags", s);
|
|
attr->sensor = OCC_INIT_ATTR(attr->name, 0444,
|
|
occ_show_extended, NULL, 1, i);
|
|
attr++;
|
|
|
|
snprintf(attr->name, sizeof(attr->name), "extn%d_input", s);
|
|
attr->sensor = OCC_INIT_ATTR(attr->name, 0444,
|
|
occ_show_extended, NULL, 2, i);
|
|
attr++;
|
|
}
|
|
|
|
/* put the sensors in the group */
|
|
for (i = 0; i < num_attrs; ++i) {
|
|
sysfs_attr_init(&occ->attrs[i].sensor.dev_attr.attr);
|
|
occ->group.attrs[i] = &occ->attrs[i].sensor.dev_attr.attr;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* only need to do this once at startup, as OCC won't change sensors on us */
|
|
static void occ_parse_poll_response(struct occ *occ)
|
|
{
|
|
unsigned int i, old_offset, offset = 0, size = 0;
|
|
struct occ_sensor *sensor;
|
|
struct occ_sensors *sensors = &occ->sensors;
|
|
struct occ_response *resp = &occ->resp;
|
|
struct occ_poll_response *poll =
|
|
(struct occ_poll_response *)&resp->data[0];
|
|
struct occ_poll_response_header *header = &poll->header;
|
|
struct occ_sensor_data_block *block = &poll->block;
|
|
|
|
dev_info(occ->bus_dev, "OCC found, code level: %.16s\n",
|
|
header->occ_code_level);
|
|
|
|
for (i = 0; i < header->num_sensor_data_blocks; ++i) {
|
|
block = (struct occ_sensor_data_block *)((u8 *)block + offset);
|
|
old_offset = offset;
|
|
offset = (block->header.num_sensors *
|
|
block->header.sensor_length) + sizeof(block->header);
|
|
size += offset;
|
|
|
|
/* validate all the length/size fields */
|
|
if ((size + sizeof(*header)) >= OCC_RESP_DATA_BYTES) {
|
|
dev_warn(occ->bus_dev, "exceeded response buffer\n");
|
|
return;
|
|
}
|
|
|
|
dev_dbg(occ->bus_dev, " %04x..%04x: %.4s (%d sensors)\n",
|
|
old_offset, offset - 1, block->header.eye_catcher,
|
|
block->header.num_sensors);
|
|
|
|
/* match sensor block type */
|
|
if (strncmp(block->header.eye_catcher, "TEMP", 4) == 0)
|
|
sensor = &sensors->temp;
|
|
else if (strncmp(block->header.eye_catcher, "FREQ", 4) == 0)
|
|
sensor = &sensors->freq;
|
|
else if (strncmp(block->header.eye_catcher, "POWR", 4) == 0)
|
|
sensor = &sensors->power;
|
|
else if (strncmp(block->header.eye_catcher, "CAPS", 4) == 0)
|
|
sensor = &sensors->caps;
|
|
else if (strncmp(block->header.eye_catcher, "EXTN", 4) == 0)
|
|
sensor = &sensors->extended;
|
|
else {
|
|
dev_warn(occ->bus_dev, "sensor not supported %.4s\n",
|
|
block->header.eye_catcher);
|
|
continue;
|
|
}
|
|
|
|
sensor->num_sensors = block->header.num_sensors;
|
|
sensor->version = block->header.sensor_format;
|
|
sensor->data = &block->data;
|
|
}
|
|
|
|
dev_dbg(occ->bus_dev, "Max resp size: %u+%zd=%zd\n", size,
|
|
sizeof(*header), size + sizeof(*header));
|
|
}
|
|
|
|
int occ_setup(struct occ *occ, const char *name)
|
|
{
|
|
int rc;
|
|
|
|
mutex_init(&occ->lock);
|
|
occ->groups[0] = &occ->group;
|
|
|
|
/* no need to lock */
|
|
rc = occ_poll(occ);
|
|
if (rc == -ESHUTDOWN) {
|
|
dev_info(occ->bus_dev, "host is not ready\n");
|
|
return rc;
|
|
} else if (rc < 0) {
|
|
dev_err(occ->bus_dev,
|
|
"failed to get OCC poll response=%02x: %d\n",
|
|
occ->resp.return_status, rc);
|
|
return rc;
|
|
}
|
|
|
|
occ->next_update = jiffies + OCC_UPDATE_FREQUENCY;
|
|
occ_parse_poll_response(occ);
|
|
|
|
rc = occ_setup_sensor_attrs(occ);
|
|
if (rc) {
|
|
dev_err(occ->bus_dev, "failed to setup sensor attrs: %d\n",
|
|
rc);
|
|
return rc;
|
|
}
|
|
|
|
occ->hwmon = devm_hwmon_device_register_with_groups(occ->bus_dev, name,
|
|
occ, occ->groups);
|
|
if (IS_ERR(occ->hwmon)) {
|
|
rc = PTR_ERR(occ->hwmon);
|
|
dev_err(occ->bus_dev, "failed to register hwmon device: %d\n",
|
|
rc);
|
|
return rc;
|
|
}
|
|
|
|
rc = occ_setup_sysfs(occ);
|
|
if (rc)
|
|
dev_err(occ->bus_dev, "failed to setup sysfs: %d\n", rc);
|
|
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL_GPL(occ_setup);
|
|
|
|
MODULE_AUTHOR("Eddie James <eajames@linux.ibm.com>");
|
|
MODULE_DESCRIPTION("Common OCC hwmon code");
|
|
MODULE_LICENSE("GPL");
|