matthew/sonic-buildimage
Archived
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

fix DOM support caoability issues on QSFP and CMIS cables (#12500)

Browse Source 
Signed-off-by: Kebo Liu <kebol@nvidia.com>

Signed-off-by: Kebo Liu <kebol@nvidia.com>
This commit is contained in:
Kebo Liu 2022-10-31 14:20:57 +08:00 committed by GitHub
parent 67b6541c19
commit db03698ba5
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 34 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
platform/mellanox/mlnx-platform-api/sonic_platform/sfp.py
View File

@ -415,6 +415,26 @@ class SFP(SfpBase):
# in this case we treat it as the default type according to the SKU
self.sfp_type = sfp_type
def _is_qsfp_copper(self):
# This function read the specification compliance byte and
# ext specification compliance byte to judge whether the cable is copper or not.
# It is only designed for SFF 8636 cables, SFF 8472 and CMIS cables don't apply.
# copper cables defined in SFF8024 "Extended Specification Compliance Codes"
copper_ext_specification_list = ['08', '0b', '0c', '0d', '19', '30', '32', '40']
offset = PAGE00_HIGH_MEMORY_OFFSET
qsfp_specification_raw = self._read_eeprom_specific_bytes(offset + XCVR_COMPLIANCE_CODE_OFFSET, 1)
qsfp_specification = int(qsfp_specification_raw[0], 16)
# The 4th bit of the specification complaince byte(131) indicate a 40GBASE-CR4 copper cable
if qsfp_specification & 0x8:
return True
qsfp_ext_specification_raw = self._read_eeprom_specific_bytes(offset + XCVR_EXT_SPECIFICATION_COMPLIANCE_OFFSET, XCVR_EXT_SPECIFICATION_COMPLIANCE_WIDTH)
if qsfp_ext_specification_raw[0] in copper_ext_specification_list:
return True
return False
def _dom_capability_detect(self):
if not self.get_presence():
@ -428,6 +448,16 @@ class SFP(SfpBase):
return
if self.sfp_type == QSFP_TYPE:
if self._is_qsfp_copper():
self.dom_supported = False
self.dom_temp_supported = False
self.dom_volt_supported = False
self.dom_rx_power_supported = False
self.dom_tx_power_supported = False
self.calibration = 0
self.qsfp_page3_available = False
return
self.calibration = 1
sfpi_obj = sff8436InterfaceId()
if sfpi_obj is None:
@ -482,11 +512,11 @@ class SFP(SfpBase):
# two types of QSFP-DD cable types supported: Copper and Optical.
qsfp_dom_capability_raw = self._read_eeprom_specific_bytes((offset + XCVR_DOM_CAPABILITY_OFFSET_QSFP_DD), XCVR_DOM_CAPABILITY_WIDTH_QSFP_DD)
if qsfp_dom_capability_raw is not None:
self.dom_temp_supported = True
self.dom_volt_supported = True
dom_capability = sfpi_obj.parse_dom_capability(qsfp_dom_capability_raw, 0)
if dom_capability['data']['Flat_MEM']['value'] == 'Off':
self.dom_supported = True
self.dom_temp_supported = True
self.dom_volt_supported = True
self.second_application_list = True
self.dom_rx_power_supported = True
self.dom_tx_power_supported = True
@ -495,6 +525,8 @@ class SFP(SfpBase):
self.dom_rx_tx_power_bias_supported = True
else:
self.dom_supported = False
self.dom_temp_supported = False
self.dom_volt_supported = False
self.second_application_list = False
self.dom_rx_power_supported = False
self.dom_tx_power_supported = False