1// SPDX-License-Identifier: GPL-2.0
  2/* Intel(R) Gigabit Ethernet Linux driver
  3 * Copyright(c) 2007-2014 Intel Corporation.
  4 *
  5 * This program is free software; you can redistribute it and/or modify it
  6 * under the terms and conditions of the GNU General Public License,
  7 * version 2, as published by the Free Software Foundation.
  8 *
  9 * This program is distributed in the hope it will be useful, but WITHOUT
 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 12 * more details.
 13 *
 14 * You should have received a copy of the GNU General Public License along with
 15 * this program; if not, see <http://www.gnu.org/licenses/>.
 16 *
 17 * The full GNU General Public License is included in this distribution in
 18 * the file called "COPYING".
 19 *
 20 * Contact Information:
 21 * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
 22 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 23 */
 24
 25#include "igb.h"
 26#include "e1000_82575.h"
 27#include "e1000_hw.h"
 28
 29#include <linux/module.h>
 30#include <linux/types.h>
 31#include <linux/sysfs.h>
 32#include <linux/kobject.h>
 33#include <linux/device.h>
 34#include <linux/netdevice.h>
 35#include <linux/hwmon.h>
 36#include <linux/pci.h>
 37
 38#ifdef CONFIG_IGB_HWMON
 39static struct i2c_board_info i350_sensor_info = {
 40	I2C_BOARD_INFO("i350bb", (0Xf8 >> 1)),
 41};
 42
 43/* hwmon callback functions */
 44static ssize_t igb_hwmon_show_location(struct device *dev,
 45				       struct device_attribute *attr,
 46				       char *buf)
 47{
 48	struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr,
 49						   dev_attr);
 50	return sprintf(buf, "loc%u\n",
 51		       igb_attr->sensor->location);
 52}
 53
 54static ssize_t igb_hwmon_show_temp(struct device *dev,
 55				   struct device_attribute *attr,
 56				   char *buf)
 57{
 58	struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr,
 59						   dev_attr);
 60	unsigned int value;
 61
 62	/* reset the temp field */
 63	igb_attr->hw->mac.ops.get_thermal_sensor_data(igb_attr->hw);
 64
 65	value = igb_attr->sensor->temp;
 66
 67	/* display millidegree */
 68	value *= 1000;
 69
 70	return sprintf(buf, "%u\n", value);
 71}
 72
 73static ssize_t igb_hwmon_show_cautionthresh(struct device *dev,
 74					    struct device_attribute *attr,
 75					    char *buf)
 76{
 77	struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr,
 78						   dev_attr);
 79	unsigned int value = igb_attr->sensor->caution_thresh;
 80
 81	/* display millidegree */
 82	value *= 1000;
 83
 84	return sprintf(buf, "%u\n", value);
 85}
 86
 87static ssize_t igb_hwmon_show_maxopthresh(struct device *dev,
 88					  struct device_attribute *attr,
 89					  char *buf)
 90{
 91	struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr,
 92						   dev_attr);
 93	unsigned int value = igb_attr->sensor->max_op_thresh;
 94
 95	/* display millidegree */
 96	value *= 1000;
 97
 98	return sprintf(buf, "%u\n", value);
 99}
100
101/* igb_add_hwmon_attr - Create hwmon attr table for a hwmon sysfs file.
102 * @ adapter: pointer to the adapter structure
103 * @ offset: offset in the eeprom sensor data table
104 * @ type: type of sensor data to display
105 *
106 * For each file we want in hwmon's sysfs interface we need a device_attribute
107 * This is included in our hwmon_attr struct that contains the references to
108 * the data structures we need to get the data to display.
109 */
110static int igb_add_hwmon_attr(struct igb_adapter *adapter,
111			      unsigned int offset, int type)
112{
113	int rc;
114	unsigned int n_attr;
115	struct hwmon_attr *igb_attr;
116
117	n_attr = adapter->igb_hwmon_buff->n_hwmon;
118	igb_attr = &adapter->igb_hwmon_buff->hwmon_list[n_attr];
119
120	switch (type) {
121	case IGB_HWMON_TYPE_LOC:
122		igb_attr->dev_attr.show = igb_hwmon_show_location;
123		snprintf(igb_attr->name, sizeof(igb_attr->name),
124			 "temp%u_label", offset + 1);
125		break;
126	case IGB_HWMON_TYPE_TEMP:
127		igb_attr->dev_attr.show = igb_hwmon_show_temp;
128		snprintf(igb_attr->name, sizeof(igb_attr->name),
129			 "temp%u_input", offset + 1);
130		break;
131	case IGB_HWMON_TYPE_CAUTION:
132		igb_attr->dev_attr.show = igb_hwmon_show_cautionthresh;
133		snprintf(igb_attr->name, sizeof(igb_attr->name),
134			 "temp%u_max", offset + 1);
135		break;
136	case IGB_HWMON_TYPE_MAX:
137		igb_attr->dev_attr.show = igb_hwmon_show_maxopthresh;
138		snprintf(igb_attr->name, sizeof(igb_attr->name),
139			 "temp%u_crit", offset + 1);
140		break;
141	default:
142		rc = -EPERM;
143		return rc;
144	}
145
146	/* These always the same regardless of type */
147	igb_attr->sensor =
148		&adapter->hw.mac.thermal_sensor_data.sensor[offset];
149	igb_attr->hw = &adapter->hw;
150	igb_attr->dev_attr.store = NULL;
151	igb_attr->dev_attr.attr.mode = 0444;
152	igb_attr->dev_attr.attr.name = igb_attr->name;
153	sysfs_attr_init(&igb_attr->dev_attr.attr);
154
155	adapter->igb_hwmon_buff->attrs[n_attr] = &igb_attr->dev_attr.attr;
156
157	++adapter->igb_hwmon_buff->n_hwmon;
158
159	return 0;
160}
161
162static void igb_sysfs_del_adapter(struct igb_adapter *adapter)
163{
164}
165
166/* called from igb_main.c */
167void igb_sysfs_exit(struct igb_adapter *adapter)
168{
169	igb_sysfs_del_adapter(adapter);
170}
171
172/* called from igb_main.c */
173int igb_sysfs_init(struct igb_adapter *adapter)
174{
175	struct hwmon_buff *igb_hwmon;
176	struct i2c_client *client;
177	struct device *hwmon_dev;
178	unsigned int i;
179	int rc = 0;
180
181	/* If this method isn't defined we don't support thermals */
182	if (adapter->hw.mac.ops.init_thermal_sensor_thresh == NULL)
183		goto exit;
184
185	/* Don't create thermal hwmon interface if no sensors present */
186	rc = (adapter->hw.mac.ops.init_thermal_sensor_thresh(&adapter->hw));
187	if (rc)
188		goto exit;
189
190	igb_hwmon = devm_kzalloc(&adapter->pdev->dev, sizeof(*igb_hwmon),
191				 GFP_KERNEL);
192	if (!igb_hwmon) {
193		rc = -ENOMEM;
194		goto exit;
195	}
196	adapter->igb_hwmon_buff = igb_hwmon;
197
198	for (i = 0; i < E1000_MAX_SENSORS; i++) {
199
200		/* Only create hwmon sysfs entries for sensors that have
201		 * meaningful data.
202		 */
203		if (adapter->hw.mac.thermal_sensor_data.sensor[i].location == 0)
204			continue;
205
206		/* Bail if any hwmon attr struct fails to initialize */
207		rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_CAUTION);
208		if (rc)
209			goto exit;
210		rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_LOC);
211		if (rc)
212			goto exit;
213		rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_TEMP);
214		if (rc)
215			goto exit;
216		rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_MAX);
217		if (rc)
218			goto exit;
219	}
220
221	/* init i2c_client */
222	client = i2c_new_device(&adapter->i2c_adap, &i350_sensor_info);
223	if (client == NULL) {
224		dev_info(&adapter->pdev->dev,
225			 "Failed to create new i2c device.\n");
226		rc = -ENODEV;
227		goto exit;
228	}
229	adapter->i2c_client = client;
230
231	igb_hwmon->groups[0] = &igb_hwmon->group;
232	igb_hwmon->group.attrs = igb_hwmon->attrs;
233
234	hwmon_dev = devm_hwmon_device_register_with_groups(&adapter->pdev->dev,
235							   client->name,
236							   igb_hwmon,
237							   igb_hwmon->groups);
238	if (IS_ERR(hwmon_dev)) {
239		rc = PTR_ERR(hwmon_dev);
240		goto err;
241	}
242
243	goto exit;
244
245err:
246	igb_sysfs_del_adapter(adapter);
247exit:
248	return rc;
249}
250#endif