Commit 71858acb authored by Aurélien Guillaume's avatar Aurélien Guillaume Committed by Jeff Kirsher
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ixgbe: implement SFF diagnostic monitoring via ethtool



This patch adds support for reading data from SFP+ modules over i2c.
Signed-off-by: default avatarAurélien Guillaume <footplus@gmail.com>
Signed-off-by: default avatarEmil Tantilov <emil.s.tantilov@intel.com>
Tested-by: default avatarPhil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent 51d0420b
......@@ -620,6 +620,7 @@ enum ixgbe_state_t {
__IXGBE_DOWN,
__IXGBE_SERVICE_SCHED,
__IXGBE_IN_SFP_INIT,
__IXGBE_READ_I2C,
};
struct ixgbe_cb {
......
......@@ -39,6 +39,7 @@
#include <linux/uaccess.h>
#include "ixgbe.h"
#include "ixgbe_phy.h"
#define IXGBE_ALL_RAR_ENTRIES 16
......@@ -2839,6 +2840,117 @@ static int ixgbe_set_channels(struct net_device *dev,
return ixgbe_setup_tc(dev, netdev_get_num_tc(dev));
}
static int ixgbe_get_module_info(struct net_device *dev,
struct ethtool_modinfo *modinfo)
{
struct ixgbe_adapter *adapter = netdev_priv(dev);
struct ixgbe_hw *hw = &adapter->hw;
u32 status;
u8 sff8472_rev, addr_mode;
int ret_val = 0;
bool page_swap = false;
/* avoid concurent i2c reads */
while (test_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
msleep(100);
/* used by the service task */
set_bit(__IXGBE_READ_I2C, &adapter->state);
/* Check whether we support SFF-8472 or not */
status = hw->phy.ops.read_i2c_eeprom(hw,
IXGBE_SFF_SFF_8472_COMP,
&sff8472_rev);
if (status != 0) {
ret_val = -EIO;
goto err_out;
}
/* addressing mode is not supported */
status = hw->phy.ops.read_i2c_eeprom(hw,
IXGBE_SFF_SFF_8472_SWAP,
&addr_mode);
if (status != 0) {
ret_val = -EIO;
goto err_out;
}
if (addr_mode & IXGBE_SFF_ADDRESSING_MODE) {
e_err(drv, "Address change required to access page 0xA2, but not supported. Please report the module type to the driver maintainers.\n");
page_swap = true;
}
if (sff8472_rev == IXGBE_SFF_SFF_8472_UNSUP || page_swap) {
/* We have a SFP, but it does not support SFF-8472 */
modinfo->type = ETH_MODULE_SFF_8079;
modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN;
} else {
/* We have a SFP which supports a revision of SFF-8472. */
modinfo->type = ETH_MODULE_SFF_8472;
modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN;
}
err_out:
clear_bit(__IXGBE_READ_I2C, &adapter->state);
return ret_val;
}
static int ixgbe_get_module_eeprom(struct net_device *dev,
struct ethtool_eeprom *ee,
u8 *data)
{
struct ixgbe_adapter *adapter = netdev_priv(dev);
struct ixgbe_hw *hw = &adapter->hw;
u32 status = IXGBE_ERR_PHY_ADDR_INVALID;
u8 databyte = 0xFF;
int i = 0;
int ret_val = 0;
/* ixgbe_get_module_info is called before this function in all
* cases, so we do not need any checks we already do above,
* and can trust ee->len to be a known value.
*/
while (test_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
msleep(100);
set_bit(__IXGBE_READ_I2C, &adapter->state);
/* Read the first block, SFF-8079 */
for (i = 0; i < ETH_MODULE_SFF_8079_LEN; i++) {
status = hw->phy.ops.read_i2c_eeprom(hw, i, &databyte);
if (status != 0) {
/* Error occured while reading module */
ret_val = -EIO;
goto err_out;
}
data[i] = databyte;
}
/* If the second block is requested, check if SFF-8472 is supported. */
if (ee->len == ETH_MODULE_SFF_8472_LEN) {
if (data[IXGBE_SFF_SFF_8472_COMP] == IXGBE_SFF_SFF_8472_UNSUP)
return -EOPNOTSUPP;
/* Read the second block, SFF-8472 */
for (i = ETH_MODULE_SFF_8079_LEN;
i < ETH_MODULE_SFF_8472_LEN; i++) {
status = hw->phy.ops.read_i2c_sff8472(hw,
i - ETH_MODULE_SFF_8079_LEN, &databyte);
if (status != 0) {
/* Error occured while reading module */
ret_val = -EIO;
goto err_out;
}
data[i] = databyte;
}
}
err_out:
clear_bit(__IXGBE_READ_I2C, &adapter->state);
return ret_val;
}
static const struct ethtool_ops ixgbe_ethtool_ops = {
.get_settings = ixgbe_get_settings,
.set_settings = ixgbe_set_settings,
......@@ -2870,6 +2982,8 @@ static const struct ethtool_ops ixgbe_ethtool_ops = {
.get_channels = ixgbe_get_channels,
.set_channels = ixgbe_set_channels,
.get_ts_info = ixgbe_get_ts_info,
.get_module_info = ixgbe_get_module_info,
.get_module_eeprom = ixgbe_get_module_eeprom,
};
void ixgbe_set_ethtool_ops(struct net_device *netdev)
......
......@@ -5709,6 +5709,10 @@ static void ixgbe_sfp_detection_subtask(struct ixgbe_adapter *adapter)
!(adapter->flags2 & IXGBE_FLAG2_SFP_NEEDS_RESET))
return;
/* concurent i2c reads are not supported */
if (test_bit(__IXGBE_READ_I2C, &adapter->state))
return;
/* someone else is in init, wait until next service event */
if (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
return;
......
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