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sfc: Use extended MC_CMD_SENSOR_INFO and MC_CMD_READ_SENSORS

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We need to use extended requests to read and get metadata for sensors
numbered > 31.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
This commit is contained in:
Ben Hutchings 2013-08-08 11:14:20 +01:00
parent 8c4e720f18
commit d4fbdcfe93
1 changed files with 94 additions and 43 deletions
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137
drivers/net/ethernet/sfc/mcdi_mon.c
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@ -28,7 +28,7 @@ static const struct {
const char *label; const char *label;
enum efx_hwmon_type hwmon_type; enum efx_hwmon_type hwmon_type;
int port; int port;
} efx_mcdi_sensor_type[MC_CMD_SENSOR_ENTRY_MAXNUM] = { } efx_mcdi_sensor_type[] = {
#define SENSOR(name, label, hwmon_type, port) \ #define SENSOR(name, label, hwmon_type, port) \
[MC_CMD_SENSOR_##name] = { label, hwmon_type, port } [MC_CMD_SENSOR_##name] = { label, hwmon_type, port }
SENSOR(CONTROLLER_TEMP, "Controller temp.", EFX_HWMON_TEMP, -1), SENSOR(CONTROLLER_TEMP, "Controller temp.", EFX_HWMON_TEMP, -1),
@ -86,6 +86,7 @@ struct efx_mcdi_mon_attribute {
struct device_attribute dev_attr; struct device_attribute dev_attr;
unsigned int index; unsigned int index;
unsigned int type; unsigned int type;
enum efx_hwmon_type hwmon_type;
unsigned int limit_value; unsigned int limit_value;
char name[12]; char name[12];
}; };
@ -93,11 +94,12 @@ struct efx_mcdi_mon_attribute {
static int efx_mcdi_mon_update(struct efx_nic *efx) static int efx_mcdi_mon_update(struct efx_nic *efx)
{ {
struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx); struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx);
MCDI_DECLARE_BUF(inbuf, MC_CMD_READ_SENSORS_IN_LEN); MCDI_DECLARE_BUF(inbuf, MC_CMD_READ_SENSORS_EXT_IN_LEN);
int rc; int rc;
MCDI_SET_QWORD(inbuf, READ_SENSORS_IN_DMA_ADDR, MCDI_SET_QWORD(inbuf, READ_SENSORS_EXT_IN_DMA_ADDR,
hwmon->dma_buf.dma_addr); hwmon->dma_buf.dma_addr);
MCDI_SET_DWORD(inbuf, READ_SENSORS_EXT_IN_LENGTH, hwmon->dma_buf.len);
rc = efx_mcdi_rpc(efx, MC_CMD_READ_SENSORS, rc = efx_mcdi_rpc(efx, MC_CMD_READ_SENSORS,
inbuf, sizeof(inbuf), NULL, 0, NULL); inbuf, sizeof(inbuf), NULL, 0, NULL);
@ -159,7 +161,7 @@ static ssize_t efx_mcdi_mon_show_value(struct device *dev,
value = EFX_DWORD_FIELD(entry, MC_CMD_SENSOR_VALUE_ENTRY_TYPEDEF_VALUE); value = EFX_DWORD_FIELD(entry, MC_CMD_SENSOR_VALUE_ENTRY_TYPEDEF_VALUE);
/* Convert temperature from degrees to milli-degrees Celsius */ /* Convert temperature from degrees to milli-degrees Celsius */
if (efx_mcdi_sensor_type[mon_attr->type].hwmon_type == EFX_HWMON_TEMP) if (mon_attr->hwmon_type == EFX_HWMON_TEMP)
value *= 1000; value *= 1000;
return sprintf(buf, "%u\n", value); return sprintf(buf, "%u\n", value);
@ -176,7 +178,7 @@ static ssize_t efx_mcdi_mon_show_limit(struct device *dev,
value = mon_attr->limit_value; value = mon_attr->limit_value;
/* Convert temperature from degrees to milli-degrees Celsius */ /* Convert temperature from degrees to milli-degrees Celsius */
if (efx_mcdi_sensor_type[mon_attr->type].hwmon_type == EFX_HWMON_TEMP) if (mon_attr->hwmon_type == EFX_HWMON_TEMP)
value *= 1000; value *= 1000;
return sprintf(buf, "%u\n", value); return sprintf(buf, "%u\n", value);
@ -224,6 +226,10 @@ efx_mcdi_mon_add_attr(struct efx_nic *efx, const char *name,
strlcpy(attr->name, name, sizeof(attr->name)); strlcpy(attr->name, name, sizeof(attr->name));
attr->index = index; attr->index = index;
attr->type = type; attr->type = type;
if (type < ARRAY_SIZE(efx_mcdi_sensor_type))
attr->hwmon_type = efx_mcdi_sensor_type[type].hwmon_type;
else
attr->hwmon_type = EFX_HWMON_UNKNOWN;
attr->limit_value = limit_value; attr->limit_value = limit_value;
sysfs_attr_init(&attr->dev_attr.attr); sysfs_attr_init(&attr->dev_attr.attr);
attr->dev_attr.attr.name = attr->name; attr->dev_attr.attr.name = attr->name;
@ -238,35 +244,42 @@ efx_mcdi_mon_add_attr(struct efx_nic *efx, const char *name,
int efx_mcdi_mon_probe(struct efx_nic *efx) int efx_mcdi_mon_probe(struct efx_nic *efx)
{ {
struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx); struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx);
unsigned int n_attrs, n_temp = 0, n_cool = 0, n_in = 0; unsigned int n_temp = 0, n_cool = 0, n_in = 0;
MCDI_DECLARE_BUF(inbuf, MC_CMD_SENSOR_INFO_EXT_IN_LEN);
MCDI_DECLARE_BUF(outbuf, MC_CMD_SENSOR_INFO_OUT_LENMAX); MCDI_DECLARE_BUF(outbuf, MC_CMD_SENSOR_INFO_OUT_LENMAX);
unsigned int n_pages, n_sensors, n_attrs, page;
size_t outlen; size_t outlen;
char name[12]; char name[12];
u32 mask; u32 mask;
int rc, i, type; int rc, i, j, type;
BUILD_BUG_ON(MC_CMD_SENSOR_INFO_IN_LEN != 0); /* Find out how many sensors are present */
n_sensors = 0;
page = 0;
do {
MCDI_SET_DWORD(inbuf, SENSOR_INFO_EXT_IN_PAGE, page);
rc = efx_mcdi_rpc(efx, MC_CMD_SENSOR_INFO, NULL, 0, rc = efx_mcdi_rpc(efx, MC_CMD_SENSOR_INFO, inbuf, sizeof(inbuf),
outbuf, sizeof(outbuf), &outlen); outbuf, sizeof(outbuf), &outlen);
if (rc) if (rc)
return rc; return rc;
if (outlen < MC_CMD_SENSOR_INFO_OUT_LENMIN) if (outlen < MC_CMD_SENSOR_INFO_OUT_LENMIN)
return -EIO; return -EIO;
/* Find out which sensors are present. Don't create a device mask = MCDI_DWORD(outbuf, SENSOR_INFO_OUT_MASK);
* if there are none. n_sensors += hweight32(mask & ~(1 << MC_CMD_SENSOR_PAGE0_NEXT));
*/ ++page;
mask = MCDI_DWORD(outbuf, SENSOR_INFO_OUT_MASK); } while (mask & (1 << MC_CMD_SENSOR_PAGE0_NEXT));
if (mask == 0) n_pages = page;
/* Don't create a device if there are none */
if (n_sensors == 0)
return 0; return 0;
/* Check again for short response */ rc = efx_nic_alloc_buffer(
if (outlen < MC_CMD_SENSOR_INFO_OUT_LEN(hweight32(mask))) efx, &hwmon->dma_buf,
return -EIO; n_sensors * MC_CMD_SENSOR_VALUE_ENTRY_TYPEDEF_LEN,
GFP_KERNEL);
rc = efx_nic_alloc_buffer(efx, &hwmon->dma_buf,
4 * MC_CMD_SENSOR_ENTRY_MAXNUM, GFP_KERNEL);
if (rc) if (rc)
return rc; return rc;
@ -277,7 +290,7 @@ int efx_mcdi_mon_probe(struct efx_nic *efx)
* attributes for this set of sensors: name of the driver plus * attributes for this set of sensors: name of the driver plus
* value, min, max, crit, alarm and label for each sensor. * value, min, max, crit, alarm and label for each sensor.
*/ */
n_attrs = 1 + 6 * hweight32(mask); n_attrs = 1 + 6 * n_sensors;
hwmon->attrs = kcalloc(n_attrs, sizeof(*hwmon->attrs), GFP_KERNEL); hwmon->attrs = kcalloc(n_attrs, sizeof(*hwmon->attrs), GFP_KERNEL);
if (!hwmon->attrs) { if (!hwmon->attrs) {
rc = -ENOMEM; rc = -ENOMEM;
@ -294,26 +307,63 @@ int efx_mcdi_mon_probe(struct efx_nic *efx)
if (rc) if (rc)
goto fail; goto fail;
for (i = 0, type = -1; ; i++) { for (i = 0, j = -1, type = -1; ; i++) {
enum efx_hwmon_type hwmon_type;
const char *hwmon_prefix; const char *hwmon_prefix;
unsigned hwmon_index; unsigned hwmon_index;
u16 min1, max1, min2, max2; u16 min1, max1, min2, max2;
/* Find next sensor type or exit if there is none */ /* Find next sensor type or exit if there is none */
type++; do {
while (!(mask & (1 << type))) {
type++; type++;
if (type == 32)
return 0; if ((type % 32) == 0) {
page = type / 32;
j = -1;
if (page == n_pages)
return 0;
MCDI_SET_DWORD(inbuf, SENSOR_INFO_EXT_IN_PAGE,
page);
rc = efx_mcdi_rpc(efx, MC_CMD_SENSOR_INFO,
inbuf, sizeof(inbuf),
outbuf, sizeof(outbuf),
&outlen);
if (rc)
goto fail;
if (outlen < MC_CMD_SENSOR_INFO_OUT_LENMIN) {
rc = -EIO;
goto fail;
}
mask = (MCDI_DWORD(outbuf,
SENSOR_INFO_OUT_MASK) &
~(1 << MC_CMD_SENSOR_PAGE0_NEXT));
/* Check again for short response */
if (outlen <
MC_CMD_SENSOR_INFO_OUT_LEN(hweight32(mask))) {
rc = -EIO;
goto fail;
}
}
} while (!(mask & (1 << type % 32)));
j++;
if (type < ARRAY_SIZE(efx_mcdi_sensor_type)) {
hwmon_type = efx_mcdi_sensor_type[type].hwmon_type;
/* Skip sensors specific to a different port */
if (hwmon_type != EFX_HWMON_UNKNOWN &&
efx_mcdi_sensor_type[type].port >= 0 &&
efx_mcdi_sensor_type[type].port !=
efx_port_num(efx))
continue;
} else {
hwmon_type = EFX_HWMON_UNKNOWN;
} }
/* Skip sensors specific to a different port */ switch (hwmon_type) {
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: case EFX_HWMON_TEMP:
hwmon_prefix = "temp"; hwmon_prefix = "temp";
hwmon_index = ++n_temp; /* 1-based */ hwmon_index = ++n_temp; /* 1-based */
@ -333,13 +383,13 @@ int efx_mcdi_mon_probe(struct efx_nic *efx)
} }
min1 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY, min1 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY,
SENSOR_INFO_ENTRY, i, MIN1); SENSOR_INFO_ENTRY, j, MIN1);
max1 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY, max1 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY,
SENSOR_INFO_ENTRY, i, MAX1); SENSOR_INFO_ENTRY, j, MAX1);
min2 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY, min2 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY,
SENSOR_INFO_ENTRY, i, MIN2); SENSOR_INFO_ENTRY, j, MIN2);
max2 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY, max2 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY,
SENSOR_INFO_ENTRY, i, MAX2); SENSOR_INFO_ENTRY, j, MAX2);
if (min1 != max1) { if (min1 != max1) {
snprintf(name, sizeof(name), "%s%u_input", snprintf(name, sizeof(name), "%s%u_input",
@ -386,7 +436,8 @@ int efx_mcdi_mon_probe(struct efx_nic *efx)
if (rc) if (rc)
goto fail; goto fail;
if (efx_mcdi_sensor_type[type].label) { if (type < ARRAY_SIZE(efx_mcdi_sensor_type) &&
efx_mcdi_sensor_type[type].label) {
snprintf(name, sizeof(name), "%s%u_label", snprintf(name, sizeof(name), "%s%u_label",
hwmon_prefix, hwmon_index); hwmon_prefix, hwmon_index);
rc = efx_mcdi_mon_add_attr( rc = efx_mcdi_mon_add_attr(