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ice: Reimplement module reads used by ethtool 

There was an excessive increment of the QSFP page, which is
now fixed. Additionally, this new update now reads 8 bytes
at a time and will retry each request if the module/bus is
busy.

Also, prevent reading from upper pages if module does not
support those pages.

Signed-off-by: Scott W Taylor <scott.w.taylor@intel.com>
Tested-by: Tony Brelinski <tonyx.brelinski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
This commit is contained in:
Scott W Taylor 2021-03-31 14:17:00 -07:00 committed by Tony Nguyen
parent d59684a07e
commit e9c9692c8a
1 changed files with 39 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

49
drivers/net/ethernet/intel/ice/ice_ethtool.c
View File

@ -3914,30 +3914,33 @@ ice_get_module_eeprom(struct net_device *netdev,
struct ethtool_eeprom *ee, u8 *data)
{
struct ice_netdev_priv *np = netdev_priv(netdev);
#define SFF_READ_BLOCK_SIZE 8
u8 value[SFF_READ_BLOCK_SIZE] = { 0 };
u8 addr = ICE_I2C_EEPROM_DEV_ADDR;
struct ice_vsi *vsi = np->vsi;
struct ice_pf *pf = vsi->back;
struct ice_hw *hw = &pf->hw;
enum ice_status status;
bool is_sfp = false;
unsigned int i;
unsigned int i, j;
u16 offset = 0;
u8 value = 0;
u8 page = 0;
if (!ee || !ee->len || !data)
return -EINVAL;
status = ice_aq_sff_eeprom(hw, 0, addr, offset, page, 0, &value, 1, 0,
status = ice_aq_sff_eeprom(hw, 0, addr, offset, page, 0, value, 1, 0,
NULL);
if (status)
return -EIO;
if (value == ICE_MODULE_TYPE_SFP)
if (value[0] == ICE_MODULE_TYPE_SFP)
is_sfp = true;
for (i = 0; i < ee->len; i++) {
memset(data, 0, ee->len);
for (i = 0; i < ee->len; i += SFF_READ_BLOCK_SIZE) {
offset = i + ee->offset;
page = 0;
/* Check if we need to access the other memory page */
if (is_sfp) {
@ -3953,11 +3956,37 @@ ice_get_module_eeprom(struct net_device *netdev,
}
}
status = ice_aq_sff_eeprom(hw, 0, addr, offset, page, !is_sfp,
&value, 1, 0, NULL);
if (status)
value = 0;
data[i] = value;
/* Bit 2 of EEPROM address 0x02 declares upper
* pages are disabled on QSFP modules.
* SFP modules only ever use page 0.
*/
if (page == 0 || !(data[0x2] & 0x4)) {
/* If i2c bus is busy due to slow page change or
* link management access, call can fail. This is normal.
* So we retry this a few times.
*/
for (j = 0; j < 4; j++) {
status = ice_aq_sff_eeprom(hw, 0, addr, offset, page,
!is_sfp, value,
SFF_READ_BLOCK_SIZE,
0, NULL);
netdev_dbg(netdev, "SFF %02X %02X %02X %X = %02X%02X%02X%02X.%02X%02X%02X%02X (%X)\n",
addr, offset, page, is_sfp,
value[0], value[1], value[2], value[3],
value[4], value[5], value[6], value[7],
status);
if (status) {
usleep_range(1500, 2500);
memset(value, 0, SFF_READ_BLOCK_SIZE);
continue;
}
break;
}
/* Make sure we have enough room for the new block */
if ((i + SFF_READ_BLOCK_SIZE) < ee->len)
memcpy(data + i, value, SFF_READ_BLOCK_SIZE);
}
}
return 0;
}