[PATCH 2/2] ibmpex: Add energy consumption meters
From: Darrick J. Wong
Date: Tue Jan 29 2008 - 04:15:02 EST
Amend the ibmpex driver to report system energy consumption data.
Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
---
drivers/hwmon/ibmpex.c | 135 +++++++++++++++++++++++++++++++++++++++++++++---
1 files changed, 127 insertions(+), 8 deletions(-)
diff --git a/drivers/hwmon/ibmpex.c b/drivers/hwmon/ibmpex.c
index 9c9cdb0..8cc4262 100644
--- a/drivers/hwmon/ibmpex.c
+++ b/drivers/hwmon/ibmpex.c
@@ -35,9 +35,24 @@
#define PEX_RESET_HIGH_LOW 4
#define PEX_GET_SENSOR_DATA 6
+#define IBMPEX_TYPE_1 1
#define PEX_NET_FUNCTION 0x3A
#define PEX_COMMAND 0x3C
+#define IBMPEX_TYPE_2 2
+#define AEM_NET_FUNCTION 0x2E
+#define AEM_RUN_METHOD_COMMAND 0x81
+#define AEM_IANA_NUMBER_0 0x02
+#define AEM_READ_ELEMENT_REG 0x82
+
+#define AEM_ENERGY_REGISTER 0x01
+#define NUM_ENERGY_REGS 1
+
+static inline u64 extract_value64(const char *data, int offset)
+{
+ return be64_to_cpup((u64 *)&data[offset]);
+}
+
static inline u16 extract_value(const char *data, int offset)
{
return be16_to_cpup((u16 *)&data[offset]);
@@ -104,6 +119,9 @@ struct ibmpex_bmc_data {
unsigned char num_sensors;
struct ibmpex_sensor_data *sensors;
+
+ u64 energy[NUM_ENERGY_REGS];
+ struct sensor_device_attribute energy_attr[NUM_ENERGY_REGS];
};
struct ibmpex_driver_data {
@@ -124,10 +142,23 @@ static struct ibmpex_driver_data driver_data = {
},
};
-static int ibmpex_send_message(struct ibmpex_bmc_data *data)
+static int ibmpex_send_message(struct ibmpex_bmc_data *data, int type)
{
int err;
+ switch (type) {
+ case IBMPEX_TYPE_1:
+ data->tx_message.netfn = PEX_NET_FUNCTION;
+ data->tx_message.cmd = PEX_COMMAND;
+ break;
+ case IBMPEX_TYPE_2:
+ data->tx_message.netfn = AEM_NET_FUNCTION;
+ data->tx_message.cmd = AEM_RUN_METHOD_COMMAND;
+ break;
+ default:
+ return -EINVAL;
+ }
+
err = ipmi_validate_addr(&data->address, sizeof(data->address));
if (err)
goto out;
@@ -151,7 +182,7 @@ static int ibmpex_ver_check(struct ibmpex_bmc_data *data)
{
data->tx_msg_data[0] = PEX_GET_VERSION;
data->tx_message.data_len = 1;
- ibmpex_send_message(data);
+ ibmpex_send_message(data, IBMPEX_TYPE_1);
wait_for_completion(&data->read_complete);
@@ -177,7 +208,7 @@ static int ibmpex_query_sensor_count(struct ibmpex_bmc_data *data)
{
data->tx_msg_data[0] = PEX_GET_SENSOR_COUNT;
data->tx_message.data_len = 1;
- ibmpex_send_message(data);
+ ibmpex_send_message(data, IBMPEX_TYPE_1);
wait_for_completion(&data->read_complete);
@@ -192,7 +223,7 @@ static int ibmpex_query_sensor_name(struct ibmpex_bmc_data *data, int sensor)
data->tx_msg_data[0] = PEX_GET_SENSOR_NAME;
data->tx_msg_data[1] = sensor;
data->tx_message.data_len = 2;
- ibmpex_send_message(data);
+ ibmpex_send_message(data, IBMPEX_TYPE_1);
wait_for_completion(&data->read_complete);
@@ -207,7 +238,7 @@ static int ibmpex_query_sensor_data(struct ibmpex_bmc_data *data, int sensor)
data->tx_msg_data[0] = PEX_GET_SENSOR_DATA;
data->tx_msg_data[1] = sensor;
data->tx_message.data_len = 2;
- ibmpex_send_message(data);
+ ibmpex_send_message(data, IBMPEX_TYPE_1);
wait_for_completion(&data->read_complete);
@@ -220,11 +251,36 @@ static int ibmpex_query_sensor_data(struct ibmpex_bmc_data *data, int sensor)
return 0;
}
+static int ibmpex_query_energy_data(struct ibmpex_bmc_data *data, int sensor)
+{
+ data->tx_msg_data[0] = AEM_IANA_NUMBER_0;
+ data->tx_msg_data[1] = 0x00;
+ data->tx_msg_data[2] = 0x00;
+ data->tx_msg_data[3] = 0x00;
+ data->tx_msg_data[4] = AEM_ENERGY_REGISTER;
+ data->tx_msg_data[5] = AEM_READ_ELEMENT_REG;
+ data->tx_msg_data[6] = sensor;
+ data->tx_msg_data[7] = 0x08;
+ data->tx_message.data_len = 8;
+
+ ibmpex_send_message(data, IBMPEX_TYPE_2);
+
+ wait_for_completion(&data->read_complete);
+
+ if (data->rx_result || data->rx_msg_len != 11) {
+ dev_err(data->bmc_device, "Error reading sensor %d.\n",
+ sensor);
+ return -ENOENT;
+ }
+
+ return 0;
+}
+
static int ibmpex_reset_high_low_data(struct ibmpex_bmc_data *data)
{
data->tx_msg_data[0] = PEX_RESET_HIGH_LOW;
data->tx_message.data_len = 1;
- ibmpex_send_message(data);
+ ibmpex_send_message(data, IBMPEX_TYPE_1);
wait_for_completion(&data->read_complete);
@@ -240,6 +296,13 @@ static void ibmpex_update_device(struct ibmpex_bmc_data *data)
data->valid)
goto out;
+ for (i = 0; i < NUM_ENERGY_REGS; i++) {
+ err = ibmpex_query_energy_data(data, i);
+ if (err)
+ continue;
+ data->energy[i] = extract_value64(data->rx_msg_data, 3);
+ }
+
for (i = 0; i < data->num_sensors; i++) {
if (!data->sensors[i].in_use)
continue;
@@ -279,6 +342,17 @@ static ssize_t show_name(struct device *dev, struct device_attribute *devattr,
}
static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0);
+static ssize_t ibmpex_show_energy(struct device *dev,
+ struct device_attribute *devattr,
+ char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct ibmpex_bmc_data *data = dev_get_drvdata(dev);
+ ibmpex_update_device(data);
+
+ return sprintf(buf, "%llu000\n", data->energy[attr->index]);
+}
+
static ssize_t ibmpex_show_sensor(struct device *dev,
struct device_attribute *devattr,
char *buf)
@@ -338,6 +412,33 @@ static int power_sensor_multiplier(const char *sensor_id, int len)
return 100000;
}
+static int create_energy_sensor(struct ibmpex_bmc_data *data, int sensor)
+{
+ int err;
+ char *n;
+
+ n = kmalloc(32, GFP_KERNEL);
+ if (!n)
+ return -ENOMEM;
+
+ sprintf(n, "energy%d_input", sensor);
+
+ data->energy_attr[sensor].dev_attr.attr.name = n;
+ data->energy_attr[sensor].dev_attr.attr.mode = S_IRUGO;
+ data->energy_attr[sensor].dev_attr.show = ibmpex_show_energy;
+ data->energy_attr[sensor].index = sensor;
+
+ err = device_create_file(data->bmc_device,
+ &data->energy_attr[sensor].dev_attr);
+ if (err) {
+ data->energy_attr[sensor].dev_attr.attr.name = NULL;
+ kfree(n);
+ return err;
+ }
+
+ return 0;
+}
+
static int create_sensor(struct ibmpex_bmc_data *data, int type,
int counter, int sensor, int func)
{
@@ -420,6 +521,12 @@ static int ibmpex_find_sensors(struct ibmpex_bmc_data *data)
}
}
+ for (i = 0; i < NUM_ENERGY_REGS; i++) {
+ err = create_energy_sensor(data, i);
+ if (err)
+ goto exit_remove;
+ }
+
err = device_create_file(data->bmc_device,
&sensor_dev_attr_reset_high_low.dev_attr);
if (err)
@@ -436,6 +543,13 @@ exit_remove:
device_remove_file(data->bmc_device,
&sensor_dev_attr_reset_high_low.dev_attr);
device_remove_file(data->bmc_device, &sensor_dev_attr_name.dev_attr);
+ for (i = 0; i < NUM_ENERGY_REGS; i++) {
+ if (!data->energy_attr[i].dev_attr.attr.name)
+ continue;
+ device_remove_file(data->bmc_device,
+ &data->energy_attr[i].dev_attr);
+ kfree(data->energy_attr[i].dev_attr.attr.name);
+ }
for (i = 0; i < data->num_sensors; i++)
for (j = 0; j < PEX_NUM_SENSOR_FUNCS; j++) {
if (!data->sensors[i].attr[j].dev_attr.attr.name)
@@ -480,8 +594,6 @@ static void ibmpex_register_bmc(int iface, struct device *dev)
/* Initialize message */
data->tx_msgid = 0;
init_completion(&data->read_complete);
- data->tx_message.netfn = PEX_NET_FUNCTION;
- data->tx_message.cmd = PEX_COMMAND;
data->tx_message.data = data->tx_msg_data;
/* Does this BMC support PowerExecutive? */
@@ -527,6 +639,13 @@ static void ibmpex_bmc_delete(struct ibmpex_bmc_data *data)
device_remove_file(data->bmc_device,
&sensor_dev_attr_reset_high_low.dev_attr);
device_remove_file(data->bmc_device, &sensor_dev_attr_name.dev_attr);
+ for (i = 0; i < NUM_ENERGY_REGS; i++) {
+ if (!data->energy_attr[i].dev_attr.attr.name)
+ continue;
+ device_remove_file(data->bmc_device,
+ &data->energy_attr[i].dev_attr);
+ kfree(data->energy_attr[i].dev_attr.attr.name);
+ }
for (i = 0; i < data->num_sensors; i++)
for (j = 0; j < PEX_NUM_SENSOR_FUNCS; j++) {
if (!data->sensors[i].attr[j].dev_attr.attr.name)
--
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