sfc: Use lm87 and lm90 drivers for board temperature/power monitoring

Add board monitoring to periodic work whenever link is down.
For SFE4001, report when a fault has caused the PHY to turn off.
For SFE4002, switch XFP PHY into low-power state in case of a fault.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Ben Hutchings 2008-11-04 20:34:56 +00:00 committed by Jeff Garzik
parent f41507245e
commit 3e133c44d2
8 changed files with 265 additions and 64 deletions

View File

@ -11,6 +11,7 @@
#include "phy.h"
#include "boards.h"
#include "efx.h"
#include "workarounds.h"
/* Macros for unpacking the board revision */
/* The revision info is in host byte order. */
@ -51,10 +52,129 @@ static void board_blink(struct efx_nic *efx, bool blink)
}
}
/*****************************************************************************
* Support for LM87 sensor chip used on several boards
*/
#define LM87_REG_ALARMS1 0x41
#define LM87_REG_ALARMS2 0x42
#define LM87_IN_LIMITS(nr, _min, _max) \
0x2B + (nr) * 2, _max, 0x2C + (nr) * 2, _min
#define LM87_AIN_LIMITS(nr, _min, _max) \
0x3B + (nr), _max, 0x1A + (nr), _min
#define LM87_TEMP_INT_LIMITS(_min, _max) \
0x39, _max, 0x3A, _min
#define LM87_TEMP_EXT1_LIMITS(_min, _max) \
0x37, _max, 0x38, _min
#define LM87_ALARM_TEMP_INT 0x10
#define LM87_ALARM_TEMP_EXT1 0x20
#if defined(CONFIG_SENSORS_LM87) || defined(CONFIG_SENSORS_LM87_MODULE)
static int efx_init_lm87(struct efx_nic *efx, struct i2c_board_info *info,
const u8 *reg_values)
{
struct i2c_client *client = i2c_new_device(&efx->i2c_adap, info);
int rc;
if (!client)
return -EIO;
while (*reg_values) {
u8 reg = *reg_values++;
u8 value = *reg_values++;
rc = i2c_smbus_write_byte_data(client, reg, value);
if (rc)
goto err;
}
efx->board_info.hwmon_client = client;
return 0;
err:
i2c_unregister_device(client);
return rc;
}
static void efx_fini_lm87(struct efx_nic *efx)
{
i2c_unregister_device(efx->board_info.hwmon_client);
}
static int efx_check_lm87(struct efx_nic *efx, unsigned mask)
{
struct i2c_client *client = efx->board_info.hwmon_client;
s32 alarms1, alarms2;
/* If link is up then do not monitor temperature */
if (EFX_WORKAROUND_7884(efx) && efx->link_up)
return 0;
alarms1 = i2c_smbus_read_byte_data(client, LM87_REG_ALARMS1);
alarms2 = i2c_smbus_read_byte_data(client, LM87_REG_ALARMS2);
if (alarms1 < 0)
return alarms1;
if (alarms2 < 0)
return alarms2;
alarms1 &= mask;
alarms2 &= mask >> 8;
if (alarms1 || alarms2) {
EFX_ERR(efx,
"LM87 detected a hardware failure (status %02x:%02x)"
"%s%s\n",
alarms1, alarms2,
(alarms1 & LM87_ALARM_TEMP_INT) ? " INTERNAL" : "",
(alarms1 & LM87_ALARM_TEMP_EXT1) ? " EXTERNAL" : "");
return -ERANGE;
}
return 0;
}
#else /* !CONFIG_SENSORS_LM87 */
static inline int
efx_init_lm87(struct efx_nic *efx, struct i2c_board_info *info,
const u8 *reg_values)
{
return 0;
}
static inline void efx_fini_lm87(struct efx_nic *efx)
{
}
static inline int efx_check_lm87(struct efx_nic *efx, unsigned mask)
{
return 0;
}
#endif /* CONFIG_SENSORS_LM87 */
/*****************************************************************************
* Support for the SFE4002
*
*/
static u8 sfe4002_lm87_channel = 0x03; /* use AIN not FAN inputs */
static const u8 sfe4002_lm87_regs[] = {
LM87_IN_LIMITS(0, 0x83, 0x91), /* 2.5V: 1.8V +/- 5% */
LM87_IN_LIMITS(1, 0x51, 0x5a), /* Vccp1: 1.2V +/- 5% */
LM87_IN_LIMITS(2, 0xb6, 0xca), /* 3.3V: 3.3V +/- 5% */
LM87_IN_LIMITS(3, 0xb0, 0xc9), /* 5V: 4.6-5.2V */
LM87_IN_LIMITS(4, 0xb0, 0xe0), /* 12V: 11-14V */
LM87_IN_LIMITS(5, 0x44, 0x4b), /* Vccp2: 1.0V +/- 5% */
LM87_AIN_LIMITS(0, 0xa0, 0xb2), /* AIN1: 1.66V +/- 5% */
LM87_AIN_LIMITS(1, 0x91, 0xa1), /* AIN2: 1.5V +/- 5% */
LM87_TEMP_INT_LIMITS(10, 60), /* board */
LM87_TEMP_EXT1_LIMITS(10, 70), /* Falcon */
0
};
static struct i2c_board_info sfe4002_hwmon_info = {
I2C_BOARD_INFO("lm87", 0x2e),
.platform_data = &sfe4002_lm87_channel,
.irq = -1,
};
/****************************************************************************/
/* LED allocations. Note that on rev A0 boards the schematic and the reality
* differ: red and green are swapped. Below is the fixed (A1) layout (there
@ -84,11 +204,27 @@ static void sfe4002_fault_led(struct efx_nic *efx, bool state)
QUAKE_LED_OFF);
}
static int sfe4002_check_hw(struct efx_nic *efx)
{
/* A0 board rev. 4002s report a temperature fault the whole time
* (bad sensor) so we mask it out. */
unsigned alarm_mask =
(efx->board_info.major == 0 && efx->board_info.minor == 0) ?
~LM87_ALARM_TEMP_EXT1 : ~0;
return efx_check_lm87(efx, alarm_mask);
}
static int sfe4002_init(struct efx_nic *efx)
{
int rc = efx_init_lm87(efx, &sfe4002_hwmon_info, sfe4002_lm87_regs);
if (rc)
return rc;
efx->board_info.monitor = sfe4002_check_hw;
efx->board_info.init_leds = sfe4002_init_leds;
efx->board_info.set_fault_led = sfe4002_fault_led;
efx->board_info.blink = board_blink;
efx->board_info.fini = efx_fini_lm87;
return 0;
}

View File

@ -260,6 +260,41 @@ void mdio_clause45_phy_reconfigure(struct efx_nic *efx)
MDIO_MMDREG_CTRL1, ctrl2);
}
static void mdio_clause45_set_mmd_lpower(struct efx_nic *efx,
int lpower, int mmd)
{
int phy = efx->mii.phy_id;
int stat = mdio_clause45_read(efx, phy, mmd, MDIO_MMDREG_STAT1);
int ctrl1, ctrl2;
EFX_TRACE(efx, "Setting low power mode for MMD %d to %d\n",
mmd, lpower);
if (stat & (1 << MDIO_MMDREG_STAT1_LPABLE_LBN)) {
ctrl1 = ctrl2 = mdio_clause45_read(efx, phy,
mmd, MDIO_MMDREG_CTRL1);
if (lpower)
ctrl2 |= (1 << MDIO_MMDREG_CTRL1_LPOWER_LBN);
else
ctrl2 &= ~(1 << MDIO_MMDREG_CTRL1_LPOWER_LBN);
if (ctrl1 != ctrl2)
mdio_clause45_write(efx, phy, mmd,
MDIO_MMDREG_CTRL1, ctrl2);
}
}
void mdio_clause45_set_mmds_lpower(struct efx_nic *efx,
int low_power, unsigned int mmd_mask)
{
int mmd = 0;
while (mmd_mask) {
if (mmd_mask & 1)
mdio_clause45_set_mmd_lpower(efx, low_power, mmd);
mmd_mask = (mmd_mask >> 1);
mmd++;
}
}
/**
* mdio_clause45_get_settings - Read (some of) the PHY settings over MDIO.
* @efx: Efx NIC

View File

@ -54,6 +54,9 @@
/* Loopback bit for WIS, PCS, PHYSX and DTEXS */
#define MDIO_MMDREG_CTRL1_LBACK_LBN (14)
#define MDIO_MMDREG_CTRL1_LBACK_WIDTH (1)
/* Low power */
#define MDIO_MMDREG_CTRL1_LPOWER_LBN (11)
#define MDIO_MMDREG_CTRL1_LPOWER_WIDTH (1)
/* Bits in MMDREG_STAT1 */
#define MDIO_MMDREG_STAT1_FAULT_LBN (7)
@ -240,6 +243,10 @@ extern void mdio_clause45_transmit_disable(struct efx_nic *efx);
/* Generic part of reconfigure: set/clear loopback bits */
extern void mdio_clause45_phy_reconfigure(struct efx_nic *efx);
/* Set the power state of the specified MMDs */
extern void mdio_clause45_set_mmds_lpower(struct efx_nic *efx,
int low_power, unsigned int mmd_mask);
/* Read (some of) the PHY settings over MDIO */
extern void mdio_clause45_get_settings(struct efx_nic *efx,
struct ethtool_cmd *ecmd);

View File

@ -414,6 +414,7 @@ struct efx_blinker {
* @init_leds: Sets up board LEDs
* @set_fault_led: Turns the fault LED on or off
* @blink: Starts/stops blinking
* @monitor: Board-specific health check function
* @fini: Cleanup function
* @blinker: used to blink LEDs in software
* @hwmon_client: I2C client for hardware monitor
@ -428,6 +429,7 @@ struct efx_board {
* have a separate init callback that happens later than
* board init. */
int (*init_leds)(struct efx_nic *efx);
int (*monitor) (struct efx_nic *nic);
void (*set_fault_led) (struct efx_nic *efx, bool state);
void (*blink) (struct efx_nic *efx, bool start);
void (*fini) (struct efx_nic *nic);
@ -525,11 +527,15 @@ struct efx_phy_operations {
* @enum efx_phy_mode - PHY operating mode flags
* @PHY_MODE_NORMAL: on and should pass traffic
* @PHY_MODE_TX_DISABLED: on with TX disabled
* @PHY_MODE_LOW_POWER: set to low power through MDIO
* @PHY_MODE_OFF: switched off through external control
* @PHY_MODE_SPECIAL: on but will not pass traffic
*/
enum efx_phy_mode {
PHY_MODE_NORMAL = 0,
PHY_MODE_TX_DISABLED = 1,
PHY_MODE_LOW_POWER = 2,
PHY_MODE_OFF = 4,
PHY_MODE_SPECIAL = 8,
};

View File

@ -21,6 +21,7 @@
#include "falcon_hwdefs.h"
#include "falcon_io.h"
#include "mac.h"
#include "workarounds.h"
/**************************************************************************
*
@ -65,48 +66,9 @@
#define P1_SPARE_LBN 4
#define P1_SPARE_WIDTH 4
/**************************************************************************
*
* Temperature Sensor
*
**************************************************************************/
#define MAX6647 0x4e
#define RLTS 0x00
#define RLTE 0x01
#define RSL 0x02
#define RCL 0x03
#define RCRA 0x04
#define RLHN 0x05
#define RLLI 0x06
#define RRHI 0x07
#define RRLS 0x08
#define WCRW 0x0a
#define WLHO 0x0b
#define WRHA 0x0c
#define WRLN 0x0e
#define OSHT 0x0f
#define REET 0x10
#define RIET 0x11
#define RWOE 0x19
#define RWOI 0x20
#define HYS 0x21
#define QUEUE 0x22
#define MFID 0xfe
#define REVID 0xff
/* Status bits */
#define MAX6647_BUSY (1 << 7) /* ADC is converting */
#define MAX6647_LHIGH (1 << 6) /* Local high temp. alarm */
#define MAX6647_LLOW (1 << 5) /* Local low temp. alarm */
#define MAX6647_RHIGH (1 << 4) /* Remote high temp. alarm */
#define MAX6647_RLOW (1 << 3) /* Remote low temp. alarm */
#define MAX6647_FAULT (1 << 2) /* DXN/DXP short/open circuit */
#define MAX6647_EOT (1 << 1) /* Remote junction overtemp. */
#define MAX6647_IOT (1 << 0) /* Local junction overtemp. */
static const u8 xgphy_max_temperature = 90;
/* Temperature Sensor */
#define MAX664X_REG_RSL 0x02
#define MAX664X_REG_WLHO 0x0B
static void sfe4001_poweroff(struct efx_nic *efx)
{
@ -119,7 +81,7 @@ static void sfe4001_poweroff(struct efx_nic *efx)
i2c_smbus_write_byte_data(ioexp_client, P0_CONFIG, 0xff);
/* Clear any over-temperature alert */
i2c_smbus_read_byte_data(hwmon_client, RSL);
i2c_smbus_read_byte_data(hwmon_client, MAX664X_REG_RSL);
}
static int sfe4001_poweron(struct efx_nic *efx)
@ -131,7 +93,7 @@ static int sfe4001_poweron(struct efx_nic *efx)
u8 out;
/* Clear any previous over-temperature alert */
rc = i2c_smbus_read_byte_data(hwmon_client, RSL);
rc = i2c_smbus_read_byte_data(hwmon_client, MAX664X_REG_RSL);
if (rc < 0)
return rc;
@ -209,6 +171,34 @@ fail_on:
return rc;
}
static int sfe4001_check_hw(struct efx_nic *efx)
{
s32 status;
/* If XAUI link is up then do not monitor */
if (EFX_WORKAROUND_7884(efx) && falcon_xaui_link_ok(efx))
return 0;
/* Check the powered status of the PHY. Lack of power implies that
* the MAX6647 has shut down power to it, probably due to a temp.
* alarm. Reading the power status rather than the MAX6647 status
* directly because the later is read-to-clear and would thus
* start to power up the PHY again when polled, causing us to blip
* the power undesirably.
* We know we can read from the IO expander because we did
* it during power-on. Assume failure now is bad news. */
status = i2c_smbus_read_byte_data(efx->board_info.ioexp_client, P1_IN);
if (status >= 0 &&
(status & ((1 << P1_AFE_PWD_LBN) | (1 << P1_DSP_PWD25_LBN))) != 0)
return 0;
/* Use board power control, not PHY power control */
sfe4001_poweroff(efx);
efx->phy_mode = PHY_MODE_OFF;
return (status < 0) ? -EIO : -ERANGE;
}
/* On SFE4001 rev A2 and later, we can control the FLASH_CFG_1 pin
* using the 3V3X output of the IO-expander. Allow the user to set
* this when the device is stopped, and keep it stopped then.
@ -261,35 +251,34 @@ static void sfe4001_fini(struct efx_nic *efx)
i2c_unregister_device(efx->board_info.hwmon_client);
}
static struct i2c_board_info sfe4001_hwmon_info = {
I2C_BOARD_INFO("max6647", 0x4e),
.irq = -1,
};
/* This board uses an I2C expander to provider power to the PHY, which needs to
* be turned on before the PHY can be used.
* Context: Process context, rtnl lock held
*/
int sfe4001_init(struct efx_nic *efx)
{
struct i2c_client *hwmon_client;
int rc;
hwmon_client = i2c_new_dummy(&efx->i2c_adap, MAX6647);
if (!hwmon_client)
#if defined(CONFIG_SENSORS_LM90) || defined(CONFIG_SENSORS_LM90_MODULE)
efx->board_info.hwmon_client =
i2c_new_device(&efx->i2c_adap, &sfe4001_hwmon_info);
#else
efx->board_info.hwmon_client =
i2c_new_dummy(&efx->i2c_adap, sfe4001_hwmon_info.addr);
#endif
if (!efx->board_info.hwmon_client)
return -EIO;
efx->board_info.hwmon_client = hwmon_client;
/* Set DSP over-temperature alert threshold */
EFX_INFO(efx, "DSP cut-out at %dC\n", xgphy_max_temperature);
rc = i2c_smbus_write_byte_data(hwmon_client, WLHO,
xgphy_max_temperature);
/* Raise board/PHY high limit from 85 to 90 degrees Celsius */
rc = i2c_smbus_write_byte_data(efx->board_info.hwmon_client,
MAX664X_REG_WLHO, 90);
if (rc)
goto fail_ioexp;
/* Read it back and verify */
rc = i2c_smbus_read_byte_data(hwmon_client, RLHN);
if (rc < 0)
goto fail_ioexp;
if (rc != xgphy_max_temperature) {
rc = -EFAULT;
goto fail_ioexp;
}
goto fail_hwmon;
efx->board_info.ioexp_client = i2c_new_dummy(&efx->i2c_adap, PCA9539);
if (!efx->board_info.ioexp_client) {
@ -301,6 +290,7 @@ int sfe4001_init(struct efx_nic *efx)
* blink code. */
efx->board_info.blink = tenxpress_phy_blink;
efx->board_info.monitor = sfe4001_check_hw;
efx->board_info.fini = sfe4001_fini;
rc = sfe4001_poweron(efx);
@ -319,6 +309,6 @@ fail_on:
fail_ioexp:
i2c_unregister_device(efx->board_info.ioexp_client);
fail_hwmon:
i2c_unregister_device(hwmon_client);
i2c_unregister_device(efx->board_info.hwmon_client);
return rc;
}

View File

@ -376,6 +376,7 @@ static int tenxpress_phy_check_hw(struct efx_nic *efx)
{
struct tenxpress_phy_data *phy_data = efx->phy_data;
bool link_ok;
int rc = 0;
link_ok = tenxpress_link_ok(efx, true);
@ -391,7 +392,22 @@ static int tenxpress_phy_check_hw(struct efx_nic *efx)
atomic_set(&phy_data->bad_crc_count, 0);
}
return 0;
rc = efx->board_info.monitor(efx);
if (rc) {
EFX_ERR(efx, "Board sensor %s; shutting down PHY\n",
(rc == -ERANGE) ? "reported fault" : "failed");
if (efx->phy_mode & PHY_MODE_OFF) {
/* Assume that board has shut PHY off */
phy_data->phy_mode = PHY_MODE_OFF;
} else {
efx->phy_mode |= PHY_MODE_LOW_POWER;
mdio_clause45_set_mmds_lpower(efx, true,
efx->phy_op->mmds);
phy_data->phy_mode |= PHY_MODE_LOW_POWER;
}
}
return rc;
}
static void tenxpress_phy_fini(struct efx_nic *efx)

View File

@ -22,6 +22,8 @@
#define EFX_WORKAROUND_5147 EFX_WORKAROUND_ALWAYS
/* RX PCIe double split performance issue */
#define EFX_WORKAROUND_7575 EFX_WORKAROUND_ALWAYS
/* Bit-bashed I2C reads cause performance drop */
#define EFX_WORKAROUND_7884 EFX_WORKAROUND_ALWAYS
/* TX pkt parser problem with <= 16 byte TXes */
#define EFX_WORKAROUND_9141 EFX_WORKAROUND_ALWAYS
/* Low rate CRC errors require XAUI reset */

View File

@ -128,6 +128,15 @@ static int xfp_phy_check_hw(struct efx_nic *efx)
if (link_up != efx->link_up)
falcon_xmac_sim_phy_event(efx);
rc = efx->board_info.monitor(efx);
if (rc) {
struct xfp_phy_data *phy_data = efx->phy_data;
EFX_ERR(efx, "XFP sensor alert; putting PHY into low power\n");
efx->phy_mode |= PHY_MODE_LOW_POWER;
mdio_clause45_set_mmds_lpower(efx, 1, XFP_REQUIRED_DEVS);
phy_data->phy_mode |= PHY_MODE_LOW_POWER;
}
return rc;
}