--- /dev/null
+/****************************************************************************
+ * Driver for Solarflare Solarstorm network controllers and boards
+ * Copyright 2011 Solarflare Communications Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation, incorporated herein by reference.
+ */
+
+#include <linux/bitops.h>
+#include <linux/slab.h>
+#include <linux/hwmon.h>
+#include <linux/stat.h>
+
+#include "net_driver.h"
+#include "mcdi.h"
+#include "mcdi_pcol.h"
+#include "nic.h"
+
+enum efx_hwmon_type {
+ EFX_HWMON_UNKNOWN,
+ EFX_HWMON_TEMP, /* temperature */
+ EFX_HWMON_COOL, /* cooling device, probably a heatsink */
+ EFX_HWMON_IN /* input voltage */
+};
+
+static const struct {
+ const char *label;
+ enum efx_hwmon_type hwmon_type;
+ int port;
+} efx_mcdi_sensor_type[MC_CMD_SENSOR_ENTRY_MAXNUM] = {
+#define SENSOR(name, label, hwmon_type, port) \
+ [MC_CMD_SENSOR_##name] = { label, hwmon_type, port }
+ SENSOR(CONTROLLER_TEMP, "Controller temp.", EFX_HWMON_TEMP, -1),
+ SENSOR(PHY_COMMON_TEMP, "PHY temp.", EFX_HWMON_TEMP, -1),
+ SENSOR(CONTROLLER_COOLING, "Controller cooling", EFX_HWMON_COOL, -1),
+ SENSOR(PHY0_TEMP, "PHY temp.", EFX_HWMON_TEMP, 0),
+ SENSOR(PHY0_COOLING, "PHY cooling", EFX_HWMON_COOL, 0),
+ SENSOR(PHY1_TEMP, "PHY temp.", EFX_HWMON_TEMP, 1),
+ SENSOR(PHY1_COOLING, "PHY cooling", EFX_HWMON_COOL, 1),
+ SENSOR(IN_1V0, "1.0V supply", EFX_HWMON_IN, -1),
+ SENSOR(IN_1V2, "1.2V supply", EFX_HWMON_IN, -1),
+ SENSOR(IN_1V8, "1.8V supply", EFX_HWMON_IN, -1),
+ SENSOR(IN_2V5, "2.5V supply", EFX_HWMON_IN, -1),
+ SENSOR(IN_3V3, "3.3V supply", EFX_HWMON_IN, -1),
+ SENSOR(IN_12V0, "12.0V supply", EFX_HWMON_IN, -1),
+ SENSOR(IN_1V2A, "1.2V analogue supply", EFX_HWMON_IN, -1),
+ SENSOR(IN_VREF, "ref. voltage", EFX_HWMON_IN, -1),
+#undef SENSOR
+};
+
+static const char *const sensor_status_names[] = {
+ [MC_CMD_SENSOR_STATE_OK] = "OK",
+ [MC_CMD_SENSOR_STATE_WARNING] = "Warning",
+ [MC_CMD_SENSOR_STATE_FATAL] = "Fatal",
+ [MC_CMD_SENSOR_STATE_BROKEN] = "Device failure",
+};
+
+void efx_mcdi_sensor_event(struct efx_nic *efx, efx_qword_t *ev)
+{
+ unsigned int type, state, value;
+ const char *name = NULL, *state_txt;
+
+ type = EFX_QWORD_FIELD(*ev, MCDI_EVENT_SENSOREVT_MONITOR);
+ state = EFX_QWORD_FIELD(*ev, MCDI_EVENT_SENSOREVT_STATE);
+ value = EFX_QWORD_FIELD(*ev, MCDI_EVENT_SENSOREVT_VALUE);
+
+ /* Deal gracefully with the board having more drivers than we
+ * know about, but do not expect new sensor states. */
+ if (type < ARRAY_SIZE(efx_mcdi_sensor_type))
+ name = efx_mcdi_sensor_type[type].label;
+ if (!name)
+ name = "No sensor name available";
+ EFX_BUG_ON_PARANOID(state >= ARRAY_SIZE(sensor_status_names));
+ state_txt = sensor_status_names[state];
+
+ netif_err(efx, hw, efx->net_dev,
+ "Sensor %d (%s) reports condition '%s' for raw value %d\n",
+ type, name, state_txt, value);
+}
+
+#ifdef CONFIG_SFC_MCDI_MON
+
+struct efx_mcdi_mon_attribute {
+ struct device_attribute dev_attr;
+ unsigned int index;
+ unsigned int type;
+ unsigned int limit_value;
+ char name[12];
+};
+
+static int efx_mcdi_mon_update(struct efx_nic *efx)
+{
+ struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx);
+ u8 inbuf[MC_CMD_READ_SENSORS_IN_LEN];
+ int rc;
+
+ MCDI_SET_DWORD(inbuf, READ_SENSORS_IN_DMA_ADDR_LO,
+ hwmon->dma_buf.dma_addr & 0xffffffff);
+ MCDI_SET_DWORD(inbuf, READ_SENSORS_IN_DMA_ADDR_HI,
+ (u64)hwmon->dma_buf.dma_addr >> 32);
+
+ rc = efx_mcdi_rpc(efx, MC_CMD_READ_SENSORS,
+ inbuf, sizeof(inbuf), NULL, 0, NULL);
+ if (rc == 0)
+ hwmon->last_update = jiffies;
+ return rc;
+}
+
+static ssize_t efx_mcdi_mon_show_name(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return sprintf(buf, "%s\n", KBUILD_MODNAME);
+}
+
+static int efx_mcdi_mon_get_entry(struct device *dev, unsigned int index,
+ efx_dword_t *entry)
+{
+ struct efx_nic *efx = dev_get_drvdata(dev);
+ struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx);
+ int rc;
+
+ BUILD_BUG_ON(MC_CMD_READ_SENSORS_OUT_LEN != 0);
+
+ mutex_lock(&hwmon->update_lock);
+
+ /* Use cached value if last update was < 1 s ago */
+ if (time_before(jiffies, hwmon->last_update + HZ))
+ rc = 0;
+ else
+ rc = efx_mcdi_mon_update(efx);
+
+ /* Copy out the requested entry */
+ *entry = ((efx_dword_t *)hwmon->dma_buf.addr)[index];
+
+ mutex_unlock(&hwmon->update_lock);
+
+ return rc;
+}
+
+static ssize_t efx_mcdi_mon_show_value(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct efx_mcdi_mon_attribute *mon_attr =
+ container_of(attr, struct efx_mcdi_mon_attribute, dev_attr);
+ efx_dword_t entry;
+ unsigned int value;
+ int rc;
+
+ rc = efx_mcdi_mon_get_entry(dev, mon_attr->index, &entry);
+ if (rc)
+ return rc;
+
+ value = EFX_DWORD_FIELD(entry, MC_CMD_SENSOR_VALUE_ENTRY_TYPEDEF_VALUE);
+
+ /* Convert temperature from degrees to milli-degrees Celsius */
+ if (efx_mcdi_sensor_type[mon_attr->type].hwmon_type == EFX_HWMON_TEMP)
+ value *= 1000;
+
+ return sprintf(buf, "%u\n", value);
+}
+
+static ssize_t efx_mcdi_mon_show_limit(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct efx_mcdi_mon_attribute *mon_attr =
+ container_of(attr, struct efx_mcdi_mon_attribute, dev_attr);
+ unsigned int value;
+
+ value = mon_attr->limit_value;
+
+ /* Convert temperature from degrees to milli-degrees Celsius */
+ if (efx_mcdi_sensor_type[mon_attr->type].hwmon_type == EFX_HWMON_TEMP)
+ value *= 1000;
+
+ return sprintf(buf, "%u\n", value);
+}
+
+static ssize_t efx_mcdi_mon_show_alarm(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct efx_mcdi_mon_attribute *mon_attr =
+ container_of(attr, struct efx_mcdi_mon_attribute, dev_attr);
+ efx_dword_t entry;
+ int state;
+ int rc;
+
+ rc = efx_mcdi_mon_get_entry(dev, mon_attr->index, &entry);
+ if (rc)
+ return rc;
+
+ state = EFX_DWORD_FIELD(entry, MC_CMD_SENSOR_VALUE_ENTRY_TYPEDEF_STATE);
+ return sprintf(buf, "%d\n", state != MC_CMD_SENSOR_STATE_OK);
+}
+
+static ssize_t efx_mcdi_mon_show_label(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct efx_mcdi_mon_attribute *mon_attr =
+ container_of(attr, struct efx_mcdi_mon_attribute, dev_attr);
+ return sprintf(buf, "%s\n",
+ efx_mcdi_sensor_type[mon_attr->type].label);
+}
+
+static int
+efx_mcdi_mon_add_attr(struct efx_nic *efx, const char *name,
+ ssize_t (*reader)(struct device *,
+ struct device_attribute *, char *),
+ unsigned int index, unsigned int type,
+ unsigned int limit_value)
+{
+ struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx);
+ struct efx_mcdi_mon_attribute *attr = &hwmon->attrs[hwmon->n_attrs];
+ int rc;
+
+ strlcpy(attr->name, name, sizeof(attr->name));
+ attr->index = index;
+ attr->type = type;
+ attr->limit_value = limit_value;
+ attr->dev_attr.attr.name = attr->name;
+ attr->dev_attr.attr.mode = S_IRUGO;
+ attr->dev_attr.show = reader;
+ rc = device_create_file(&efx->pci_dev->dev, &attr->dev_attr);
+ if (rc == 0)
+ ++hwmon->n_attrs;
+ return rc;
+}
+
+int efx_mcdi_mon_probe(struct efx_nic *efx)
+{
+ struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx);
+ unsigned int n_attrs, n_temp = 0, n_cool = 0, n_in = 0;
+ u8 outbuf[MC_CMD_SENSOR_INFO_OUT_LENMAX];
+ size_t outlen;
+ char name[12];
+ u32 mask;
+ int rc, i, type;
+
+ BUILD_BUG_ON(MC_CMD_SENSOR_INFO_IN_LEN != 0);
+
+ rc = efx_mcdi_rpc(efx, MC_CMD_SENSOR_INFO, NULL, 0,
+ outbuf, sizeof(outbuf), &outlen);
+ if (rc)
+ return rc;
+ if (outlen < MC_CMD_SENSOR_INFO_OUT_LENMIN)
+ return -EIO;
+
+ /* Find out which sensors are present. Don't create a device
+ * if there are none.
+ */
+ mask = MCDI_DWORD(outbuf, SENSOR_INFO_OUT_MASK);
+ if (mask == 0)
+ return 0;
+
+ /* Check again for short response */
+ if (outlen < MC_CMD_SENSOR_INFO_OUT_LEN(hweight32(mask)))
+ return -EIO;
+
+ rc = efx_nic_alloc_buffer(efx, &hwmon->dma_buf,
+ 4 * MC_CMD_SENSOR_ENTRY_MAXNUM);
+ if (rc)
+ return rc;
+
+ mutex_init(&hwmon->update_lock);
+ efx_mcdi_mon_update(efx);
+
+ /* Allocate space for the maximum possible number of
+ * attributes for this set of sensors: name of the driver plus
+ * value, min, max, crit, alarm and label for each sensor.
+ */
+ n_attrs = 1 + 6 * hweight32(mask);
+ hwmon->attrs = kcalloc(n_attrs, sizeof(*hwmon->attrs), GFP_KERNEL);
+ if (!hwmon->attrs) {
+ rc = -ENOMEM;
+ goto fail;
+ }
+
+ hwmon->device = hwmon_device_register(&efx->pci_dev->dev);
+ if (IS_ERR(hwmon->device)) {
+ rc = PTR_ERR(hwmon->device);
+ goto fail;
+ }
+
+ rc = efx_mcdi_mon_add_attr(efx, "name", efx_mcdi_mon_show_name, 0, 0, 0);
+ if (rc)
+ goto fail;
+
+ for (i = 0, type = -1; ; i++) {
+ const char *hwmon_prefix;
+ unsigned hwmon_index;
+ u16 min1, max1, min2, max2;
+
+ /* Find next sensor type or exit if there is none */
+ type++;
+ while (!(mask & (1 << type))) {
+ type++;
+ if (type == 32)
+ return 0;
+ }
+
+ /* Skip sensors specific to a different port */
+ if (efx_mcdi_sensor_type[type].hwmon_type != EFX_HWMON_UNKNOWN &&
+ efx_mcdi_sensor_type[type].port >= 0 &&
+ efx_mcdi_sensor_type[type].port != efx_port_num(efx))
+ continue;
+
+ switch (efx_mcdi_sensor_type[type].hwmon_type) {
+ case EFX_HWMON_TEMP:
+ hwmon_prefix = "temp";
+ hwmon_index = ++n_temp; /* 1-based */
+ break;
+ case EFX_HWMON_COOL:
+ /* This is likely to be a heatsink, but there
+ * is no convention for representing cooling
+ * devices other than fans.
+ */
+ hwmon_prefix = "fan";
+ hwmon_index = ++n_cool; /* 1-based */
+ break;
+ default:
+ hwmon_prefix = "in";
+ hwmon_index = n_in++; /* 0-based */
+ break;
+ }
+
+ min1 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY,
+ SENSOR_INFO_ENTRY, i, MIN1);
+ max1 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY,
+ SENSOR_INFO_ENTRY, i, MAX1);
+ min2 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY,
+ SENSOR_INFO_ENTRY, i, MIN2);
+ max2 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY,
+ SENSOR_INFO_ENTRY, i, MAX2);
+
+ if (min1 != max1) {
+ snprintf(name, sizeof(name), "%s%u_input",
+ hwmon_prefix, hwmon_index);
+ rc = efx_mcdi_mon_add_attr(
+ efx, name, efx_mcdi_mon_show_value, i, type, 0);
+ if (rc)
+ goto fail;
+
+ snprintf(name, sizeof(name), "%s%u_min",
+ hwmon_prefix, hwmon_index);
+ rc = efx_mcdi_mon_add_attr(
+ efx, name, efx_mcdi_mon_show_limit,
+ i, type, min1);
+ if (rc)
+ goto fail;
+
+ snprintf(name, sizeof(name), "%s%u_max",
+ hwmon_prefix, hwmon_index);
+ rc = efx_mcdi_mon_add_attr(
+ efx, name, efx_mcdi_mon_show_limit,
+ i, type, max1);
+ if (rc)
+ goto fail;
+
+ if (min2 != max2) {
+ /* Assume max2 is critical value.
+ * But we have no good way to expose min2.
+ */
+ snprintf(name, sizeof(name), "%s%u_crit",
+ hwmon_prefix, hwmon_index);
+ rc = efx_mcdi_mon_add_attr(
+ efx, name, efx_mcdi_mon_show_limit,
+ i, type, max2);
+ if (rc)
+ goto fail;
+ }
+ }
+
+ snprintf(name, sizeof(name), "%s%u_alarm",
+ hwmon_prefix, hwmon_index);
+ rc = efx_mcdi_mon_add_attr(
+ efx, name, efx_mcdi_mon_show_alarm, i, type, 0);
+ if (rc)
+ goto fail;
+
+ if (efx_mcdi_sensor_type[type].label) {
+ snprintf(name, sizeof(name), "%s%u_label",
+ hwmon_prefix, hwmon_index);
+ rc = efx_mcdi_mon_add_attr(
+ efx, name, efx_mcdi_mon_show_label, i, type, 0);
+ if (rc)
+ goto fail;
+ }
+ }
+
+fail:
+ efx_mcdi_mon_remove(efx);
+ return rc;
+}
+
+void efx_mcdi_mon_remove(struct efx_nic *efx)
+{
+ struct siena_nic_data *nic_data = efx->nic_data;
+ struct efx_mcdi_mon *hwmon = &nic_data->hwmon;
+ unsigned int i;
+
+ for (i = 0; i < hwmon->n_attrs; i++)
+ device_remove_file(&efx->pci_dev->dev,
+ &hwmon->attrs[i].dev_attr);
+ kfree(hwmon->attrs);
+ if (hwmon->device)
+ hwmon_device_unregister(hwmon->device);
+ efx_nic_free_buffer(efx, &hwmon->dma_buf);
+}
+
+#endif /* CONFIG_SFC_MCDI_MON */
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff