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ixgbe: fix for link failure on SFP+ DA cables

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This patch helps prevent FW/SW semaphore collision from leading
to link establishment failure.  The collision might mess up the
PHY registers so we reset the PHY.  However there are SFI/KR areas
in the PHY that are not reset with a Reset_AN so we need to change
LMS to reset it.  Also wait until AN state machine is AN_GOOD

Signed-off-by: Don Skidmore <donald.c.skidmore@intel.com>
Tested-by: Stephen Ko <stephen.s.ko@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Don Skidmore 2010-12-03 13:23:30 +00:00 committed by David S. Miller
parent 8917a3c0b7
commit a7f5a5fcd9
2 changed files with 28 additions and 3 deletions
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28
drivers/net/ixgbe/ixgbe_82599.c
View file

@ -96,6 +96,8 @@ static void ixgbe_init_mac_link_ops_82599(struct ixgbe_hw *hw)
static s32 ixgbe_setup_sfp_modules_82599(struct ixgbe_hw *hw)
{
s32 ret_val = 0;
u32 reg_anlp1 = 0;
u32 i = 0;
u16 list_offset, data_offset, data_value;
if (hw->phy.sfp_type != ixgbe_sfp_type_unknown) {
@ -122,14 +124,34 @@ static s32 ixgbe_setup_sfp_modules_82599(struct ixgbe_hw *hw)
IXGBE_WRITE_FLUSH(hw);
hw->eeprom.ops.read(hw, ++data_offset, &data_value);
}
/* Now restart DSP by setting Restart_AN */
IXGBE_WRITE_REG(hw, IXGBE_AUTOC,
(IXGBE_READ_REG(hw, IXGBE_AUTOC) | IXGBE_AUTOC_AN_RESTART));
/* Release the semaphore */
ixgbe_release_swfw_sync(hw, IXGBE_GSSR_MAC_CSR_SM);
/* Delay obtaining semaphore again to allow FW access */
msleep(hw->eeprom.semaphore_delay);
/* Now restart DSP by setting Restart_AN and clearing LMS */
IXGBE_WRITE_REG(hw, IXGBE_AUTOC, ((IXGBE_READ_REG(hw,
IXGBE_AUTOC) & ~IXGBE_AUTOC_LMS_MASK) |
IXGBE_AUTOC_AN_RESTART));
/* Wait for AN to leave state 0 */
for (i = 0; i < 10; i++) {
msleep(4);
reg_anlp1 = IXGBE_READ_REG(hw, IXGBE_ANLP1);
if (reg_anlp1 & IXGBE_ANLP1_AN_STATE_MASK)
break;
}
if (!(reg_anlp1 & IXGBE_ANLP1_AN_STATE_MASK)) {
hw_dbg(hw, "sfp module setup not complete\n");
ret_val = IXGBE_ERR_SFP_SETUP_NOT_COMPLETE;
goto setup_sfp_out;
}
/* Restart DSP by setting Restart_AN and return to SFI mode */
IXGBE_WRITE_REG(hw, IXGBE_AUTOC, (IXGBE_READ_REG(hw,
IXGBE_AUTOC) | IXGBE_AUTOC_LMS_10G_SERIAL |
IXGBE_AUTOC_AN_RESTART));
}
setup_sfp_out:

3
drivers/net/ixgbe/ixgbe_type.h
View file

@ -1470,6 +1470,8 @@
#define IXGBE_ANLP1_PAUSE 0x0C00
#define IXGBE_ANLP1_SYM_PAUSE 0x0400
#define IXGBE_ANLP1_ASM_PAUSE 0x0800
#define IXGBE_ANLP1_AN_STATE_MASK 0x000f0000
/* SW Semaphore Register bitmasks */
#define IXGBE_SWSM_SMBI 0x00000001 /* Driver Semaphore bit */
@ -2641,6 +2643,7 @@ struct ixgbe_info {
#define IXGBE_ERR_NO_SPACE -25
#define IXGBE_ERR_OVERTEMP -26
#define IXGBE_ERR_RAR_INDEX -27
#define IXGBE_ERR_SFP_SETUP_NOT_COMPLETE -30
#define IXGBE_ERR_PBA_SECTION -31
#define IXGBE_ERR_INVALID_ARGUMENT -32
#define IXGBE_NOT_IMPLEMENTED 0x7FFFFFFF