1 /****************************************************************************
2 * Driver for Solarflare Solarstorm network controllers and boards
3 * Copyright 2011 Solarflare Communications Inc.
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published
7 * by the Free Software Foundation, incorporated herein by reference.
10 #include <linux/bitops.h>
11 #include <linux/slab.h>
12 #include <linux/hwmon.h>
13 #include <linux/stat.h>
15 #include "net_driver.h"
17 #include "mcdi_pcol.h"
22 EFX_HWMON_TEMP
, /* temperature */
23 EFX_HWMON_COOL
, /* cooling device, probably a heatsink */
24 EFX_HWMON_IN
/* input voltage */
29 enum efx_hwmon_type hwmon_type
;
31 } efx_mcdi_sensor_type
[MC_CMD_SENSOR_ENTRY_MAXNUM
] = {
32 #define SENSOR(name, label, hwmon_type, port) \
33 [MC_CMD_SENSOR_##name] = { label, hwmon_type, port }
34 SENSOR(CONTROLLER_TEMP
, "Controller temp.", EFX_HWMON_TEMP
, -1),
35 SENSOR(PHY_COMMON_TEMP
, "PHY temp.", EFX_HWMON_TEMP
, -1),
36 SENSOR(CONTROLLER_COOLING
, "Controller cooling", EFX_HWMON_COOL
, -1),
37 SENSOR(PHY0_TEMP
, "PHY temp.", EFX_HWMON_TEMP
, 0),
38 SENSOR(PHY0_COOLING
, "PHY cooling", EFX_HWMON_COOL
, 0),
39 SENSOR(PHY1_TEMP
, "PHY temp.", EFX_HWMON_TEMP
, 1),
40 SENSOR(PHY1_COOLING
, "PHY cooling", EFX_HWMON_COOL
, 1),
41 SENSOR(IN_1V0
, "1.0V supply", EFX_HWMON_IN
, -1),
42 SENSOR(IN_1V2
, "1.2V supply", EFX_HWMON_IN
, -1),
43 SENSOR(IN_1V8
, "1.8V supply", EFX_HWMON_IN
, -1),
44 SENSOR(IN_2V5
, "2.5V supply", EFX_HWMON_IN
, -1),
45 SENSOR(IN_3V3
, "3.3V supply", EFX_HWMON_IN
, -1),
46 SENSOR(IN_12V0
, "12.0V supply", EFX_HWMON_IN
, -1),
47 SENSOR(IN_1V2A
, "1.2V analogue supply", EFX_HWMON_IN
, -1),
48 SENSOR(IN_VREF
, "ref. voltage", EFX_HWMON_IN
, -1),
52 static const char *const sensor_status_names
[] = {
53 [MC_CMD_SENSOR_STATE_OK
] = "OK",
54 [MC_CMD_SENSOR_STATE_WARNING
] = "Warning",
55 [MC_CMD_SENSOR_STATE_FATAL
] = "Fatal",
56 [MC_CMD_SENSOR_STATE_BROKEN
] = "Device failure",
59 void efx_mcdi_sensor_event(struct efx_nic
*efx
, efx_qword_t
*ev
)
61 unsigned int type
, state
, value
;
62 const char *name
= NULL
, *state_txt
;
64 type
= EFX_QWORD_FIELD(*ev
, MCDI_EVENT_SENSOREVT_MONITOR
);
65 state
= EFX_QWORD_FIELD(*ev
, MCDI_EVENT_SENSOREVT_STATE
);
66 value
= EFX_QWORD_FIELD(*ev
, MCDI_EVENT_SENSOREVT_VALUE
);
68 /* Deal gracefully with the board having more drivers than we
69 * know about, but do not expect new sensor states. */
70 if (type
< ARRAY_SIZE(efx_mcdi_sensor_type
))
71 name
= efx_mcdi_sensor_type
[type
].label
;
73 name
= "No sensor name available";
74 EFX_BUG_ON_PARANOID(state
>= ARRAY_SIZE(sensor_status_names
));
75 state_txt
= sensor_status_names
[state
];
77 netif_err(efx
, hw
, efx
->net_dev
,
78 "Sensor %d (%s) reports condition '%s' for raw value %d\n",
79 type
, name
, state_txt
, value
);
82 #ifdef CONFIG_SFC_MCDI_MON
84 struct efx_mcdi_mon_attribute
{
85 struct device_attribute dev_attr
;
88 unsigned int limit_value
;
92 static int efx_mcdi_mon_update(struct efx_nic
*efx
)
94 struct efx_mcdi_mon
*hwmon
= efx_mcdi_mon(efx
);
95 u8 inbuf
[MC_CMD_READ_SENSORS_IN_LEN
];
98 MCDI_SET_DWORD(inbuf
, READ_SENSORS_IN_DMA_ADDR_LO
,
99 hwmon
->dma_buf
.dma_addr
& 0xffffffff);
100 MCDI_SET_DWORD(inbuf
, READ_SENSORS_IN_DMA_ADDR_HI
,
101 (u64
)hwmon
->dma_buf
.dma_addr
>> 32);
103 rc
= efx_mcdi_rpc(efx
, MC_CMD_READ_SENSORS
,
104 inbuf
, sizeof(inbuf
), NULL
, 0, NULL
);
106 hwmon
->last_update
= jiffies
;
110 static ssize_t
efx_mcdi_mon_show_name(struct device
*dev
,
111 struct device_attribute
*attr
,
114 return sprintf(buf
, "%s\n", KBUILD_MODNAME
);
117 static int efx_mcdi_mon_get_entry(struct device
*dev
, unsigned int index
,
120 struct efx_nic
*efx
= dev_get_drvdata(dev
);
121 struct efx_mcdi_mon
*hwmon
= efx_mcdi_mon(efx
);
124 BUILD_BUG_ON(MC_CMD_READ_SENSORS_OUT_LEN
!= 0);
126 mutex_lock(&hwmon
->update_lock
);
128 /* Use cached value if last update was < 1 s ago */
129 if (time_before(jiffies
, hwmon
->last_update
+ HZ
))
132 rc
= efx_mcdi_mon_update(efx
);
134 /* Copy out the requested entry */
135 *entry
= ((efx_dword_t
*)hwmon
->dma_buf
.addr
)[index
];
137 mutex_unlock(&hwmon
->update_lock
);
142 static ssize_t
efx_mcdi_mon_show_value(struct device
*dev
,
143 struct device_attribute
*attr
,
146 struct efx_mcdi_mon_attribute
*mon_attr
=
147 container_of(attr
, struct efx_mcdi_mon_attribute
, dev_attr
);
152 rc
= efx_mcdi_mon_get_entry(dev
, mon_attr
->index
, &entry
);
156 value
= EFX_DWORD_FIELD(entry
, MC_CMD_SENSOR_VALUE_ENTRY_TYPEDEF_VALUE
);
158 /* Convert temperature from degrees to milli-degrees Celsius */
159 if (efx_mcdi_sensor_type
[mon_attr
->type
].hwmon_type
== EFX_HWMON_TEMP
)
162 return sprintf(buf
, "%u\n", value
);
165 static ssize_t
efx_mcdi_mon_show_limit(struct device
*dev
,
166 struct device_attribute
*attr
,
169 struct efx_mcdi_mon_attribute
*mon_attr
=
170 container_of(attr
, struct efx_mcdi_mon_attribute
, dev_attr
);
173 value
= mon_attr
->limit_value
;
175 /* Convert temperature from degrees to milli-degrees Celsius */
176 if (efx_mcdi_sensor_type
[mon_attr
->type
].hwmon_type
== EFX_HWMON_TEMP
)
179 return sprintf(buf
, "%u\n", value
);
182 static ssize_t
efx_mcdi_mon_show_alarm(struct device
*dev
,
183 struct device_attribute
*attr
,
186 struct efx_mcdi_mon_attribute
*mon_attr
=
187 container_of(attr
, struct efx_mcdi_mon_attribute
, dev_attr
);
192 rc
= efx_mcdi_mon_get_entry(dev
, mon_attr
->index
, &entry
);
196 state
= EFX_DWORD_FIELD(entry
, MC_CMD_SENSOR_VALUE_ENTRY_TYPEDEF_STATE
);
197 return sprintf(buf
, "%d\n", state
!= MC_CMD_SENSOR_STATE_OK
);
200 static ssize_t
efx_mcdi_mon_show_label(struct device
*dev
,
201 struct device_attribute
*attr
,
204 struct efx_mcdi_mon_attribute
*mon_attr
=
205 container_of(attr
, struct efx_mcdi_mon_attribute
, dev_attr
);
206 return sprintf(buf
, "%s\n",
207 efx_mcdi_sensor_type
[mon_attr
->type
].label
);
211 efx_mcdi_mon_add_attr(struct efx_nic
*efx
, const char *name
,
212 ssize_t (*reader
)(struct device
*,
213 struct device_attribute
*, char *),
214 unsigned int index
, unsigned int type
,
215 unsigned int limit_value
)
217 struct efx_mcdi_mon
*hwmon
= efx_mcdi_mon(efx
);
218 struct efx_mcdi_mon_attribute
*attr
= &hwmon
->attrs
[hwmon
->n_attrs
];
221 strlcpy(attr
->name
, name
, sizeof(attr
->name
));
224 attr
->limit_value
= limit_value
;
225 sysfs_attr_init(&attr
->dev_attr
.attr
);
226 attr
->dev_attr
.attr
.name
= attr
->name
;
227 attr
->dev_attr
.attr
.mode
= S_IRUGO
;
228 attr
->dev_attr
.show
= reader
;
229 rc
= device_create_file(&efx
->pci_dev
->dev
, &attr
->dev_attr
);
235 int efx_mcdi_mon_probe(struct efx_nic
*efx
)
237 struct efx_mcdi_mon
*hwmon
= efx_mcdi_mon(efx
);
238 unsigned int n_attrs
, n_temp
= 0, n_cool
= 0, n_in
= 0;
239 u8 outbuf
[MC_CMD_SENSOR_INFO_OUT_LENMAX
];
245 BUILD_BUG_ON(MC_CMD_SENSOR_INFO_IN_LEN
!= 0);
247 rc
= efx_mcdi_rpc(efx
, MC_CMD_SENSOR_INFO
, NULL
, 0,
248 outbuf
, sizeof(outbuf
), &outlen
);
251 if (outlen
< MC_CMD_SENSOR_INFO_OUT_LENMIN
)
254 /* Find out which sensors are present. Don't create a device
257 mask
= MCDI_DWORD(outbuf
, SENSOR_INFO_OUT_MASK
);
261 /* Check again for short response */
262 if (outlen
< MC_CMD_SENSOR_INFO_OUT_LEN(hweight32(mask
)))
265 rc
= efx_nic_alloc_buffer(efx
, &hwmon
->dma_buf
,
266 4 * MC_CMD_SENSOR_ENTRY_MAXNUM
);
270 mutex_init(&hwmon
->update_lock
);
271 efx_mcdi_mon_update(efx
);
273 /* Allocate space for the maximum possible number of
274 * attributes for this set of sensors: name of the driver plus
275 * value, min, max, crit, alarm and label for each sensor.
277 n_attrs
= 1 + 6 * hweight32(mask
);
278 hwmon
->attrs
= kcalloc(n_attrs
, sizeof(*hwmon
->attrs
), GFP_KERNEL
);
284 hwmon
->device
= hwmon_device_register(&efx
->pci_dev
->dev
);
285 if (IS_ERR(hwmon
->device
)) {
286 rc
= PTR_ERR(hwmon
->device
);
290 rc
= efx_mcdi_mon_add_attr(efx
, "name", efx_mcdi_mon_show_name
, 0, 0, 0);
294 for (i
= 0, type
= -1; ; i
++) {
295 const char *hwmon_prefix
;
296 unsigned hwmon_index
;
297 u16 min1
, max1
, min2
, max2
;
299 /* Find next sensor type or exit if there is none */
301 while (!(mask
& (1 << type
))) {
307 /* Skip sensors specific to a different port */
308 if (efx_mcdi_sensor_type
[type
].hwmon_type
!= EFX_HWMON_UNKNOWN
&&
309 efx_mcdi_sensor_type
[type
].port
>= 0 &&
310 efx_mcdi_sensor_type
[type
].port
!= efx_port_num(efx
))
313 switch (efx_mcdi_sensor_type
[type
].hwmon_type
) {
315 hwmon_prefix
= "temp";
316 hwmon_index
= ++n_temp
; /* 1-based */
319 /* This is likely to be a heatsink, but there
320 * is no convention for representing cooling
321 * devices other than fans.
323 hwmon_prefix
= "fan";
324 hwmon_index
= ++n_cool
; /* 1-based */
328 hwmon_index
= n_in
++; /* 0-based */
332 min1
= MCDI_ARRAY_FIELD(outbuf
, SENSOR_ENTRY
,
333 SENSOR_INFO_ENTRY
, i
, MIN1
);
334 max1
= MCDI_ARRAY_FIELD(outbuf
, SENSOR_ENTRY
,
335 SENSOR_INFO_ENTRY
, i
, MAX1
);
336 min2
= MCDI_ARRAY_FIELD(outbuf
, SENSOR_ENTRY
,
337 SENSOR_INFO_ENTRY
, i
, MIN2
);
338 max2
= MCDI_ARRAY_FIELD(outbuf
, SENSOR_ENTRY
,
339 SENSOR_INFO_ENTRY
, i
, MAX2
);
342 snprintf(name
, sizeof(name
), "%s%u_input",
343 hwmon_prefix
, hwmon_index
);
344 rc
= efx_mcdi_mon_add_attr(
345 efx
, name
, efx_mcdi_mon_show_value
, i
, type
, 0);
349 snprintf(name
, sizeof(name
), "%s%u_min",
350 hwmon_prefix
, hwmon_index
);
351 rc
= efx_mcdi_mon_add_attr(
352 efx
, name
, efx_mcdi_mon_show_limit
,
357 snprintf(name
, sizeof(name
), "%s%u_max",
358 hwmon_prefix
, hwmon_index
);
359 rc
= efx_mcdi_mon_add_attr(
360 efx
, name
, efx_mcdi_mon_show_limit
,
366 /* Assume max2 is critical value.
367 * But we have no good way to expose min2.
369 snprintf(name
, sizeof(name
), "%s%u_crit",
370 hwmon_prefix
, hwmon_index
);
371 rc
= efx_mcdi_mon_add_attr(
372 efx
, name
, efx_mcdi_mon_show_limit
,
379 snprintf(name
, sizeof(name
), "%s%u_alarm",
380 hwmon_prefix
, hwmon_index
);
381 rc
= efx_mcdi_mon_add_attr(
382 efx
, name
, efx_mcdi_mon_show_alarm
, i
, type
, 0);
386 if (efx_mcdi_sensor_type
[type
].label
) {
387 snprintf(name
, sizeof(name
), "%s%u_label",
388 hwmon_prefix
, hwmon_index
);
389 rc
= efx_mcdi_mon_add_attr(
390 efx
, name
, efx_mcdi_mon_show_label
, i
, type
, 0);
397 efx_mcdi_mon_remove(efx
);
401 void efx_mcdi_mon_remove(struct efx_nic
*efx
)
403 struct siena_nic_data
*nic_data
= efx
->nic_data
;
404 struct efx_mcdi_mon
*hwmon
= &nic_data
->hwmon
;
407 for (i
= 0; i
< hwmon
->n_attrs
; i
++)
408 device_remove_file(&efx
->pci_dev
->dev
,
409 &hwmon
->attrs
[i
].dev_attr
);
412 hwmon_device_unregister(hwmon
->device
);
413 efx_nic_free_buffer(efx
, &hwmon
->dma_buf
);
416 #endif /* CONFIG_SFC_MCDI_MON */