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ixgbe: add support for older QSFP active DA cables

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This patch adds support for QSFP active direct attach (DA) cables which
pre-date SFF-8436 v3.6.

Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Emil Tantilov 2013-08-16 23:11:14 +00:00 committed by Jeff Kirsher
parent 987e1d56b3
commit 9a84fea2ec
2 changed files with 50 additions and 10 deletions
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55
drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c
View file

@ -1175,6 +1175,10 @@ s32 ixgbe_identify_qsfp_module_generic(struct ixgbe_hw *hw)
u8 comp_codes_10g = 0;
u8 oui_bytes[3] = {0, 0, 0};
u16 enforce_sfp = 0;
u8 connector = 0;
u8 cable_length = 0;
u8 device_tech = 0;
bool active_cable = false;
if (hw->mac.ops.get_media_type(hw) != ixgbe_media_type_fiber_qsfp) {
hw->phy.sfp_type = ixgbe_sfp_type_not_present;
@ -1217,12 +1221,6 @@ s32 ixgbe_identify_qsfp_module_generic(struct ixgbe_hw *hw)
hw->phy.sfp_type = ixgbe_sfp_type_da_cu_core0;
else
hw->phy.sfp_type = ixgbe_sfp_type_da_cu_core1;
} else if (comp_codes_10g & IXGBE_SFF_QSFP_DA_ACTIVE_CABLE) {
hw->phy.type = ixgbe_phy_qsfp_active_unknown;
if (hw->bus.lan_id == 0)
hw->phy.sfp_type = ixgbe_sfp_type_da_act_lmt_core0;
else
hw->phy.sfp_type = ixgbe_sfp_type_da_act_lmt_core1;
} else if (comp_codes_10g & (IXGBE_SFF_10GBASESR_CAPABLE |
IXGBE_SFF_10GBASELR_CAPABLE)) {
if (hw->bus.lan_id == 0)
@ -1230,10 +1228,47 @@ s32 ixgbe_identify_qsfp_module_generic(struct ixgbe_hw *hw)
else
hw->phy.sfp_type = ixgbe_sfp_type_srlr_core1;
} else {
/* unsupported module type */
hw->phy.type = ixgbe_phy_sfp_unsupported;
status = IXGBE_ERR_SFP_NOT_SUPPORTED;
goto out;
if (comp_codes_10g & IXGBE_SFF_QSFP_DA_ACTIVE_CABLE)
active_cable = true;
if (!active_cable) {
/* check for active DA cables that pre-date
* SFF-8436 v3.6
*/
hw->phy.ops.read_i2c_eeprom(hw,
IXGBE_SFF_QSFP_CONNECTOR,
&connector);
hw->phy.ops.read_i2c_eeprom(hw,
IXGBE_SFF_QSFP_CABLE_LENGTH,
&cable_length);
hw->phy.ops.read_i2c_eeprom(hw,
IXGBE_SFF_QSFP_DEVICE_TECH,
&device_tech);
if ((connector ==
IXGBE_SFF_QSFP_CONNECTOR_NOT_SEPARABLE) &&
(cable_length > 0) &&
((device_tech >> 4) ==
IXGBE_SFF_QSFP_TRANSMITER_850NM_VCSEL))
active_cable = true;
}
if (active_cable) {
hw->phy.type = ixgbe_phy_qsfp_active_unknown;
if (hw->bus.lan_id == 0)
hw->phy.sfp_type =
ixgbe_sfp_type_da_act_lmt_core0;
else
hw->phy.sfp_type =
ixgbe_sfp_type_da_act_lmt_core1;
} else {
/* unsupported module type */
hw->phy.type = ixgbe_phy_sfp_unsupported;
status = IXGBE_ERR_SFP_NOT_SUPPORTED;
goto out;
}
}
if (hw->phy.sfp_type != stored_sfp_type)

5
drivers/net/ethernet/intel/ixgbe/ixgbe_phy.h
View file

@ -50,8 +50,11 @@
#define IXGBE_SFF_QSFP_VENDOR_OUI_BYTE0 0xA5
#define IXGBE_SFF_QSFP_VENDOR_OUI_BYTE1 0xA6
#define IXGBE_SFF_QSFP_VENDOR_OUI_BYTE2 0xA7
#define IXGBE_SFF_QSFP_CONNECTOR 0x82
#define IXGBE_SFF_QSFP_10GBE_COMP 0x83
#define IXGBE_SFF_QSFP_1GBE_COMP 0x86
#define IXGBE_SFF_QSFP_CABLE_LENGTH 0x92
#define IXGBE_SFF_QSFP_DEVICE_TECH 0x93
/* Bitmasks */
#define IXGBE_SFF_DA_PASSIVE_CABLE 0x4
@ -68,6 +71,8 @@
#define IXGBE_SFF_ADDRESSING_MODE 0x4
#define IXGBE_SFF_QSFP_DA_ACTIVE_CABLE 0x1
#define IXGBE_SFF_QSFP_DA_PASSIVE_CABLE 0x8
#define IXGBE_SFF_QSFP_CONNECTOR_NOT_SEPARABLE 0x23
#define IXGBE_SFF_QSFP_TRANSMITER_850NM_VCSEL 0x0
#define IXGBE_I2C_EEPROM_READ_MASK 0x100
#define IXGBE_I2C_EEPROM_STATUS_MASK 0x3
#define IXGBE_I2C_EEPROM_STATUS_NO_OPERATION 0x0