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ixgbe: Update link setup code to better support autonegotiation of speed

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The current code has some flaws in it when performing autonegotiation,
especially on KX/KX4 links.  This patch updates the code to better handle
the autonegotiation states on link setup.  The patch also removes a redundant
link configuration call on driver load, and moves link configuration to
the ->open() path.

Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@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:
Peter P Waskiewicz Jr 2009-02-05 23:54:21 -08:00 committed by David S. Miller
parent bc97114d3f
commit 3201d3130e
4 changed files with 49 additions and 80 deletions
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114
drivers/net/ixgbe/ixgbe_82598.c
View file

@ -146,18 +146,12 @@ static s32 ixgbe_get_link_capabilities_82598(struct ixgbe_hw *hw,
bool *autoneg)
{
s32 status = 0;
s32 autoc_reg;
autoc_reg = IXGBE_READ_REG(hw, IXGBE_AUTOC);
if (hw->mac.link_settings_loaded) {
autoc_reg &= ~IXGBE_AUTOC_LMS_ATTACH_TYPE;
autoc_reg &= ~IXGBE_AUTOC_LMS_MASK;
autoc_reg |= hw->mac.link_attach_type;
autoc_reg |= hw->mac.link_mode_select;
}
switch (autoc_reg & IXGBE_AUTOC_LMS_MASK) {
/*
* Determine link capabilities based on the stored value of AUTOC,
* which represents EEPROM defaults.
*/
switch (hw->mac.orig_autoc & IXGBE_AUTOC_LMS_MASK) {
case IXGBE_AUTOC_LMS_1G_LINK_NO_AN:
*speed = IXGBE_LINK_SPEED_1GB_FULL;
*autoneg = false;
@ -176,9 +170,9 @@ static s32 ixgbe_get_link_capabilities_82598(struct ixgbe_hw *hw,
case IXGBE_AUTOC_LMS_KX4_AN:
case IXGBE_AUTOC_LMS_KX4_AN_1G_AN:
*speed = IXGBE_LINK_SPEED_UNKNOWN;
if (autoc_reg & IXGBE_AUTOC_KX4_SUPP)
if (hw->mac.orig_autoc & IXGBE_AUTOC_KX4_SUPP)
*speed |= IXGBE_LINK_SPEED_10GB_FULL;
if (autoc_reg & IXGBE_AUTOC_KX_SUPP)
if (hw->mac.orig_autoc & IXGBE_AUTOC_KX_SUPP)
*speed |= IXGBE_LINK_SPEED_1GB_FULL;
*autoneg = true;
break;
@ -390,27 +384,17 @@ static s32 ixgbe_setup_mac_link_82598(struct ixgbe_hw *hw)
u32 i;
s32 status = 0;
autoc_reg = IXGBE_READ_REG(hw, IXGBE_AUTOC);
if (hw->mac.link_settings_loaded) {
autoc_reg &= ~IXGBE_AUTOC_LMS_ATTACH_TYPE;
autoc_reg &= ~IXGBE_AUTOC_LMS_MASK;
autoc_reg |= hw->mac.link_attach_type;
autoc_reg |= hw->mac.link_mode_select;
IXGBE_WRITE_REG(hw, IXGBE_AUTOC, autoc_reg);
IXGBE_WRITE_FLUSH(hw);
msleep(50);
}
/* Restart link */
autoc_reg = IXGBE_READ_REG(hw, IXGBE_AUTOC);
autoc_reg |= IXGBE_AUTOC_AN_RESTART;
IXGBE_WRITE_REG(hw, IXGBE_AUTOC, autoc_reg);
/* Only poll for autoneg to complete if specified to do so */
if (hw->phy.autoneg_wait_to_complete) {
if (hw->mac.link_mode_select == IXGBE_AUTOC_LMS_KX4_AN ||
hw->mac.link_mode_select == IXGBE_AUTOC_LMS_KX4_AN_1G_AN) {
if ((autoc_reg & IXGBE_AUTOC_LMS_MASK) ==
IXGBE_AUTOC_LMS_KX4_AN ||
(autoc_reg & IXGBE_AUTOC_LMS_MASK) ==
IXGBE_AUTOC_LMS_KX4_AN_1G_AN) {
links_reg = 0; /* Just in case Autoneg time = 0 */
for (i = 0; i < IXGBE_AUTO_NEG_TIME; i++) {
links_reg = IXGBE_READ_REG(hw, IXGBE_LINKS);
@ -534,37 +518,43 @@ static s32 ixgbe_check_mac_link_82598(struct ixgbe_hw *hw,
* Set the link speed in the AUTOC register and restarts link.
**/
static s32 ixgbe_setup_mac_link_speed_82598(struct ixgbe_hw *hw,
ixgbe_link_speed speed, bool autoneg,
bool autoneg_wait_to_complete)
ixgbe_link_speed speed, bool autoneg,
bool autoneg_wait_to_complete)
{
s32 status = 0;
s32 status = 0;
ixgbe_link_speed link_capabilities = IXGBE_LINK_SPEED_UNKNOWN;
u32 curr_autoc = IXGBE_READ_REG(hw, IXGBE_AUTOC);
u32 autoc = curr_autoc;
u32 link_mode = autoc & IXGBE_AUTOC_LMS_MASK;
/* If speed is 10G, then check for CX4 or XAUI. */
if ((speed == IXGBE_LINK_SPEED_10GB_FULL) &&
(!(hw->mac.link_attach_type & IXGBE_AUTOC_10G_KX4))) {
hw->mac.link_mode_select = IXGBE_AUTOC_LMS_10G_LINK_NO_AN;
} else if ((speed == IXGBE_LINK_SPEED_1GB_FULL) && (!autoneg)) {
hw->mac.link_mode_select = IXGBE_AUTOC_LMS_1G_LINK_NO_AN;
} else if (autoneg) {
/* BX mode - Autonegotiate 1G */
if (!(hw->mac.link_attach_type & IXGBE_AUTOC_1G_PMA_PMD))
hw->mac.link_mode_select = IXGBE_AUTOC_LMS_1G_AN;
else /* KX/KX4 mode */
hw->mac.link_mode_select = IXGBE_AUTOC_LMS_KX4_AN_1G_AN;
} else {
/* Check to see if speed passed in is supported. */
ixgbe_get_link_capabilities_82598(hw, &link_capabilities, &autoneg);
speed &= link_capabilities;
if (speed == IXGBE_LINK_SPEED_UNKNOWN)
status = IXGBE_ERR_LINK_SETUP;
/* Set KX4/KX support according to speed requested */
else if (link_mode == IXGBE_AUTOC_LMS_KX4_AN ||
link_mode == IXGBE_AUTOC_LMS_KX4_AN_1G_AN) {
autoc &= ~IXGBE_AUTOC_KX4_KX_SUPP_MASK;
if (speed & IXGBE_LINK_SPEED_10GB_FULL)
autoc |= IXGBE_AUTOC_KX4_SUPP;
if (speed & IXGBE_LINK_SPEED_1GB_FULL)
autoc |= IXGBE_AUTOC_KX_SUPP;
if (autoc != curr_autoc)
IXGBE_WRITE_REG(hw, IXGBE_AUTOC, autoc);
}
if (status == 0) {
hw->phy.autoneg_wait_to_complete = autoneg_wait_to_complete;
hw->mac.link_settings_loaded = true;
/*
* Setup and restart the link based on the new values in
* ixgbe_hw This will write the AUTOC register based on the new
* stored values
*/
ixgbe_setup_mac_link_82598(hw);
status = ixgbe_setup_mac_link_82598(hw);
}
return status;
@ -587,10 +577,6 @@ static s32 ixgbe_setup_copper_link_82598(struct ixgbe_hw *hw)
/* Restart autonegotiation on PHY */
status = hw->phy.ops.setup_link(hw);
/* Set MAC to KX/KX4 autoneg, which defaults to Parallel detection */
hw->mac.link_attach_type = (IXGBE_AUTOC_10G_KX4 | IXGBE_AUTOC_1G_KX);
hw->mac.link_mode_select = IXGBE_AUTOC_LMS_KX4_AN;
/* Set up MAC */
ixgbe_setup_mac_link_82598(hw);
@ -617,10 +603,6 @@ static s32 ixgbe_setup_copper_link_speed_82598(struct ixgbe_hw *hw,
status = hw->phy.ops.setup_link_speed(hw, speed, autoneg,
autoneg_wait_to_complete);
/* Set MAC to KX/KX4 autoneg, which defaults to Parallel detection */
hw->mac.link_attach_type = (IXGBE_AUTOC_10G_KX4 | IXGBE_AUTOC_1G_KX);
hw->mac.link_mode_select = IXGBE_AUTOC_LMS_KX4_AN;
/* Set up MAC */
ixgbe_setup_mac_link_82598(hw);
@ -720,24 +702,16 @@ static s32 ixgbe_reset_hw_82598(struct ixgbe_hw *hw)
IXGBE_WRITE_REG(hw, IXGBE_GHECCR, gheccr);
/*
* AUTOC register which stores link settings gets cleared
* and reloaded from EEPROM after reset. We need to restore
* our stored value from init in case SW changed the attach
* type or speed. If this is the first time and link settings
* have not been stored, store default settings from AUTOC.
* Store the original AUTOC value if it has not been
* stored off yet. Otherwise restore the stored original
* AUTOC value since the reset operation sets back to deaults.
*/
autoc = IXGBE_READ_REG(hw, IXGBE_AUTOC);
if (hw->mac.link_settings_loaded) {
autoc &= ~(IXGBE_AUTOC_LMS_ATTACH_TYPE);
autoc &= ~(IXGBE_AUTOC_LMS_MASK);
autoc |= hw->mac.link_attach_type;
autoc |= hw->mac.link_mode_select;
IXGBE_WRITE_REG(hw, IXGBE_AUTOC, autoc);
} else {
hw->mac.link_attach_type =
(autoc & IXGBE_AUTOC_LMS_ATTACH_TYPE);
hw->mac.link_mode_select = (autoc & IXGBE_AUTOC_LMS_MASK);
hw->mac.link_settings_loaded = true;
if (hw->mac.orig_link_settings_stored == false) {
hw->mac.orig_autoc = autoc;
hw->mac.orig_link_settings_stored = true;
} else if (autoc != hw->mac.orig_autoc) {
IXGBE_WRITE_REG(hw, IXGBE_AUTOC, hw->mac.orig_autoc);
}
/* Store the permanent mac address */

3
drivers/net/ixgbe/ixgbe_common.c
View file

@ -80,9 +80,6 @@ s32 ixgbe_start_hw_generic(struct ixgbe_hw *hw)
/* Clear the VLAN filter table */
hw->mac.ops.clear_vfta(hw);
/* Set up link */
hw->mac.ops.setup_link(hw);
/* Clear statistics registers */
hw->mac.ops.clear_hw_cntrs(hw);

3
drivers/net/ixgbe/ixgbe_main.c
View file

@ -2799,9 +2799,6 @@ static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
hw->fc.send_xon = true;
/* select 10G link by default */
hw->mac.link_mode_select = IXGBE_AUTOC_LMS_10G_LINK_NO_AN;
/* enable itr by default in dynamic mode */
adapter->itr_setting = 1;
adapter->eitr_param = 20000;

9
drivers/net/ixgbe/ixgbe_type.h
View file

@ -721,6 +721,7 @@
#define IXGBE_LED_OFF 0xF
/* AUTOC Bit Masks */
#define IXGBE_AUTOC_KX4_KX_SUPP_MASK 0xC0000000
#define IXGBE_AUTOC_KX4_SUPP 0x80000000
#define IXGBE_AUTOC_KX_SUPP 0x40000000
#define IXGBE_AUTOC_PAUSE 0x30000000
@ -1456,11 +1457,11 @@ struct ixgbe_mac_info {
u32 max_tx_queues;
u32 max_rx_queues;
u32 max_msix_vectors;
u32 link_attach_type;
u32 link_mode_select;
bool link_settings_loaded;
u32 orig_autoc;
u32 orig_autoc2;
bool orig_link_settings_stored;
bool autoneg;
bool autoneg_failed;
bool autoneg_succeeded;
};
struct ixgbe_phy_info {