u32 rmcs_reg;
u32 reg;
+#ifdef CONFIG_DCB
+ if (hw->fc.requested_mode == ixgbe_fc_pfc)
+ goto out;
+
+#endif /* CONFIG_DCB */
+ /* Negotiate the fc mode to use */
+ ret_val = ixgbe_fc_autoneg(hw);
+ if (ret_val)
+ goto out;
+
+ /* Disable any previous flow control settings */
fctrl_reg = IXGBE_READ_REG(hw, IXGBE_FCTRL);
fctrl_reg &= ~(IXGBE_FCTRL_RFCE | IXGBE_FCTRL_RPFCE);
* 0: Flow control is completely disabled
* 1: Rx flow control is enabled (we can receive pause frames,
* but not send pause frames).
- * 2: Tx flow control is enabled (we can send pause frames but
+ * 2: Tx flow control is enabled (we can send pause frames but
* we do not support receiving pause frames).
* 3: Both Rx and Tx flow control (symmetric) are enabled.
* other: Invalid.
+#ifdef CONFIG_DCB
+ * 4: Priority Flow Control is enabled.
+#endif
*/
switch (hw->fc.current_mode) {
case ixgbe_fc_none:
- /* Flow control completely disabled by software override. */
+ /*
+ * Flow control is disabled by software override or autoneg.
+ * The code below will actually disable it in the HW.
+ */
break;
case ixgbe_fc_rx_pause:
/*
fctrl_reg |= IXGBE_FCTRL_RFCE;
rmcs_reg |= IXGBE_RMCS_TFCE_802_3X;
break;
+#ifdef CONFIG_DCB
+ case ixgbe_fc_pfc:
+ goto out;
+ break;
+#endif /* CONFIG_DCB */
default:
hw_dbg(hw, "Flow control param set incorrectly\n");
ret_val = -IXGBE_ERR_CONFIG;
break;
}
- /* Enable 802.3x based flow control settings. */
+ /* Set 802.3x based flow control settings. */
fctrl_reg |= IXGBE_FCTRL_DPF;
IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl_reg);
IXGBE_WRITE_REG(hw, IXGBE_RMCS, rmcs_reg);
}
/**
- * ixgbe_setup_fc_82598 - Configure flow control settings
- * @hw: pointer to hardware structure
- * @packetbuf_num: packet buffer number (0-7)
- *
- * Configures the flow control settings based on SW configuration. This
- * function is used for 802.3x flow control configuration only.
- **/
-static s32 ixgbe_setup_fc_82598(struct ixgbe_hw *hw, s32 packetbuf_num)
-{
- s32 ret_val = 0;
- ixgbe_link_speed speed;
- bool link_up;
-
- /* Validate the packetbuf configuration */
- if (packetbuf_num < 0 || packetbuf_num > 7) {
- hw_dbg(hw, "Invalid packet buffer number [%d], expected range is"
- " 0-7\n", packetbuf_num);
- ret_val = IXGBE_ERR_INVALID_LINK_SETTINGS;
- goto out;
- }
-
- /*
- * Validate the water mark configuration. Zero water marks are invalid
- * because it causes the controller to just blast out fc packets.
- */
- if (!hw->fc.low_water || !hw->fc.high_water || !hw->fc.pause_time) {
- if (hw->fc.requested_mode != ixgbe_fc_none) {
- hw_dbg(hw, "Invalid water mark configuration\n");
- ret_val = IXGBE_ERR_INVALID_LINK_SETTINGS;
- goto out;
- }
- }
-
- /*
- * Validate the requested mode. Strict IEEE mode does not allow
- * ixgbe_fc_rx_pause because it will cause testing anomalies.
- */
- if (hw->fc.strict_ieee && hw->fc.requested_mode == ixgbe_fc_rx_pause) {
- hw_dbg(hw, "ixgbe_fc_rx_pause not valid in strict IEEE mode\n");
- ret_val = IXGBE_ERR_INVALID_LINK_SETTINGS;
- goto out;
- }
-
- /*
- * 10gig parts do not have a word in the EEPROM to determine the
- * default flow control setting, so we explicitly set it to full.
- */
- if (hw->fc.requested_mode == ixgbe_fc_default)
- hw->fc.requested_mode = ixgbe_fc_full;
-
- /*
- * Save off the requested flow control mode for use later. Depending
- * on the link partner's capabilities, we may or may not use this mode.
- */
-
- hw->fc.current_mode = hw->fc.requested_mode;
-
- /* Decide whether to use autoneg or not. */
- hw->mac.ops.check_link(hw, &speed, &link_up, false);
- if (!hw->fc.disable_fc_autoneg && hw->phy.multispeed_fiber &&
- (speed == IXGBE_LINK_SPEED_1GB_FULL))
- ret_val = ixgbe_fc_autoneg(hw);
-
- if (ret_val)
- goto out;
-
- ret_val = ixgbe_fc_enable_82598(hw, packetbuf_num);
-
-out:
- return ret_val;
-}
-
-/**
* ixgbe_setup_mac_link_82598 - Configures MAC link settings
* @hw: pointer to hardware structure
*
}
}
- /*
- * We want to save off the original Flow Control configuration just in
- * case we get disconnected and then reconnected into a different hub
- * or switch with different Flow Control capabilities.
- */
- ixgbe_setup_fc_82598(hw, 0);
-
/* Add delay to filter out noises during initial link setup */
msleep(50);
else
*speed = IXGBE_LINK_SPEED_1GB_FULL;
+ /* if link is down, zero out the current_mode */
+ if (*link_up == false) {
+ hw->fc.current_mode = ixgbe_fc_none;
+ hw->fc.fc_was_autonegged = false;
+ }
out:
return 0;
}
.disable_mc = &ixgbe_disable_mc_generic,
.clear_vfta = &ixgbe_clear_vfta_82598,
.set_vfta = &ixgbe_set_vfta_82598,
- .setup_fc = &ixgbe_setup_fc_82598,
+ .fc_enable = &ixgbe_fc_enable_82598,
};
static struct ixgbe_eeprom_operations eeprom_ops_82598 = {
IXGBE_WRITE_REG(hw, IXGBE_CTRL_EXT, ctrl_ext);
IXGBE_WRITE_FLUSH(hw);
+ /* Setup flow control */
+ ixgbe_setup_fc(hw, 0);
+
/* Clear adapter stopped flag */
hw->adapter_stopped = false;
}
/**
- * ixgbe_fc_enable - Enable flow control
+ * ixgbe_fc_enable_generic - Enable flow control
* @hw: pointer to hardware structure
* @packetbuf_num: packet buffer number (0-7)
*
* Enable flow control according to the current settings.
**/
-s32 ixgbe_fc_enable(struct ixgbe_hw *hw, s32 packetbuf_num)
+s32 ixgbe_fc_enable_generic(struct ixgbe_hw *hw, s32 packetbuf_num)
{
s32 ret_val = 0;
- u32 mflcn_reg;
- u32 fccfg_reg;
+ u32 mflcn_reg, fccfg_reg;
u32 reg;
u32 rx_pba_size;
goto out;
#endif /* CONFIG_DCB */
+ /* Negotiate the fc mode to use */
+ ret_val = ixgbe_fc_autoneg(hw);
+ if (ret_val)
+ goto out;
+ /* Disable any previous flow control settings */
mflcn_reg = IXGBE_READ_REG(hw, IXGBE_MFLCN);
mflcn_reg &= ~(IXGBE_MFLCN_RFCE | IXGBE_MFLCN_RPFCE);
*/
switch (hw->fc.current_mode) {
case ixgbe_fc_none:
- /* Flow control completely disabled by software override. */
+ /*
+ * Flow control is disabled by software override or autoneg.
+ * The code below will actually disable it in the HW.
+ */
break;
case ixgbe_fc_rx_pause:
/*
case ixgbe_fc_pfc:
goto out;
break;
-#endif
+#endif /* CONFIG_DCB */
default:
hw_dbg(hw, "Flow control param set incorrectly\n");
ret_val = -IXGBE_ERR_CONFIG;
break;
}
- /* Enable 802.3x based flow control settings. */
+ /* Set 802.3x based flow control settings. */
mflcn_reg |= IXGBE_MFLCN_DPF;
IXGBE_WRITE_REG(hw, IXGBE_MFLCN, mflcn_reg);
IXGBE_WRITE_REG(hw, IXGBE_FCCFG, fccfg_reg);
reg = IXGBE_READ_REG(hw, IXGBE_MTQC);
/* Thresholds are different for link flow control when in DCB mode */
if (reg & IXGBE_MTQC_RT_ENA) {
+ rx_pba_size = IXGBE_READ_REG(hw, IXGBE_RXPBSIZE(packetbuf_num));
+
/* Always disable XON for LFC when in DCB mode */
- IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(packetbuf_num), 0);
+ reg = (rx_pba_size >> 5) & 0xFFE0;
+ IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(packetbuf_num), reg);
- rx_pba_size = IXGBE_READ_REG(hw, IXGBE_RXPBSIZE(packetbuf_num));
reg = (rx_pba_size >> 2) & 0xFFE0;
if (hw->fc.current_mode & ixgbe_fc_tx_pause)
reg |= IXGBE_FCRTH_FCEN;
* ixgbe_fc_autoneg - Configure flow control
* @hw: pointer to hardware structure
*
- * Negotiates flow control capabilities with link partner using autoneg and
- * applies the results.
+ * Compares our advertised flow control capabilities to those advertised by
+ * our link partner, and determines the proper flow control mode to use.
**/
s32 ixgbe_fc_autoneg(struct ixgbe_hw *hw)
{
s32 ret_val = 0;
- u32 i, reg, pcs_anadv_reg, pcs_lpab_reg;
-
- reg = IXGBE_READ_REG(hw, IXGBE_PCS1GANA);
+ ixgbe_link_speed speed;
+ u32 pcs_anadv_reg, pcs_lpab_reg, linkstat;
+ bool link_up;
/*
- * The possible values of fc.current_mode are:
- * 0: Flow control is completely disabled
- * 1: Rx flow control is enabled (we can receive pause frames,
- * but not send pause frames).
- * 2: Tx flow control is enabled (we can send pause frames but
- * we do not support receiving pause frames).
- * 3: Both Rx and Tx flow control (symmetric) are enabled.
- * 4: Priority Flow Control is enabled.
- * other: Invalid.
+ * AN should have completed when the cable was plugged in.
+ * Look for reasons to bail out. Bail out if:
+ * - FC autoneg is disabled, or if
+ * - we don't have multispeed fiber, or if
+ * - we're not running at 1G, or if
+ * - link is not up, or if
+ * - link is up but AN did not complete, or if
+ * - link is up and AN completed but timed out
+ *
+ * Since we're being called from an LSC, link is already know to be up.
+ * So use link_up_wait_to_complete=false.
*/
- switch (hw->fc.current_mode) {
- case ixgbe_fc_none:
- /* Flow control completely disabled by software override. */
- reg &= ~(IXGBE_PCS1GANA_SYM_PAUSE | IXGBE_PCS1GANA_ASM_PAUSE);
- break;
- case ixgbe_fc_rx_pause:
- /*
- * Rx Flow control is enabled and Tx Flow control is
- * disabled by software override. Since there really
- * isn't a way to advertise that we are capable of RX
- * Pause ONLY, we will advertise that we support both
- * symmetric and asymmetric Rx PAUSE. Later, we will
- * disable the adapter's ability to send PAUSE frames.
- */
- reg |= (IXGBE_PCS1GANA_SYM_PAUSE | IXGBE_PCS1GANA_ASM_PAUSE);
- break;
- case ixgbe_fc_tx_pause:
- /*
- * Tx Flow control is enabled, and Rx Flow control is
- * disabled by software override.
- */
- reg |= (IXGBE_PCS1GANA_ASM_PAUSE);
- reg &= ~(IXGBE_PCS1GANA_SYM_PAUSE);
- break;
- case ixgbe_fc_full:
- /* Flow control (both Rx and Tx) is enabled by SW override. */
- reg |= (IXGBE_PCS1GANA_SYM_PAUSE | IXGBE_PCS1GANA_ASM_PAUSE);
- break;
-#ifdef CONFIG_DCB
- case ixgbe_fc_pfc:
- goto out;
- break;
-#endif
- default:
- hw_dbg(hw, "Flow control param set incorrectly\n");
- ret_val = -IXGBE_ERR_CONFIG;
- goto out;
- break;
- }
-
- IXGBE_WRITE_REG(hw, IXGBE_PCS1GANA, reg);
- reg = IXGBE_READ_REG(hw, IXGBE_PCS1GLCTL);
-
- /* Set PCS register for autoneg */
- /* Enable and restart autoneg */
- reg |= IXGBE_PCS1GLCTL_AN_ENABLE | IXGBE_PCS1GLCTL_AN_RESTART;
-
- /* Disable AN timeout */
- if (hw->fc.strict_ieee)
- reg &= ~IXGBE_PCS1GLCTL_AN_1G_TIMEOUT_EN;
-
- hw_dbg(hw, "Configuring Autoneg; PCS_LCTL = 0x%08X\n", reg);
- IXGBE_WRITE_REG(hw, IXGBE_PCS1GLCTL, reg);
-
- /* See if autonegotiation has succeeded */
- hw->mac.autoneg_succeeded = 0;
- for (i = 0; i < FIBER_LINK_UP_LIMIT; i++) {
- msleep(10);
- reg = IXGBE_READ_REG(hw, IXGBE_PCS1GLSTA);
- if ((reg & (IXGBE_PCS1GLSTA_LINK_OK |
- IXGBE_PCS1GLSTA_AN_COMPLETE)) ==
- (IXGBE_PCS1GLSTA_LINK_OK |
- IXGBE_PCS1GLSTA_AN_COMPLETE)) {
- if (!(reg & IXGBE_PCS1GLSTA_AN_TIMED_OUT))
- hw->mac.autoneg_succeeded = 1;
- break;
- }
- }
-
- if (!hw->mac.autoneg_succeeded) {
- /* Autoneg failed to achieve a link, so we turn fc off */
- hw->fc.current_mode = ixgbe_fc_none;
- hw_dbg(hw, "Flow Control = NONE.\n");
+ hw->mac.ops.check_link(hw, &speed, &link_up, false);
+ linkstat = IXGBE_READ_REG(hw, IXGBE_PCS1GLSTA);
+
+ if (hw->fc.disable_fc_autoneg ||
+ !hw->phy.multispeed_fiber ||
+ (speed != IXGBE_LINK_SPEED_1GB_FULL) ||
+ !link_up ||
+ ((linkstat & IXGBE_PCS1GLSTA_AN_COMPLETE) == 0) ||
+ ((linkstat & IXGBE_PCS1GLSTA_AN_TIMED_OUT) == 1)) {
+ hw->fc.fc_was_autonegged = false;
+ hw->fc.current_mode = hw->fc.requested_mode;
+ hw_dbg(hw, "Autoneg FC was skipped.\n");
goto out;
}
hw_dbg(hw, "Flow Control = NONE.\n");
}
+ /* Record that current_mode is the result of a successful autoneg */
+ hw->fc.fc_was_autonegged = true;
+
out:
return ret_val;
}
/**
- * ixgbe_setup_fc_generic - Set up flow control
+ * ixgbe_setup_fc - Set up flow control
* @hw: pointer to hardware structure
*
- * Sets up flow control.
+ * Called at init time to set up flow control.
**/
-s32 ixgbe_setup_fc_generic(struct ixgbe_hw *hw, s32 packetbuf_num)
+s32 ixgbe_setup_fc(struct ixgbe_hw *hw, s32 packetbuf_num)
{
s32 ret_val = 0;
- ixgbe_link_speed speed;
- bool link_up;
+ u32 reg;
#ifdef CONFIG_DCB
if (hw->fc.requested_mode == ixgbe_fc_pfc) {
* because it causes the controller to just blast out fc packets.
*/
if (!hw->fc.low_water || !hw->fc.high_water || !hw->fc.pause_time) {
- if (hw->fc.requested_mode != ixgbe_fc_none) {
- hw_dbg(hw, "Invalid water mark configuration\n");
- ret_val = IXGBE_ERR_INVALID_LINK_SETTINGS;
- goto out;
- }
+ hw_dbg(hw, "Invalid water mark configuration\n");
+ ret_val = IXGBE_ERR_INVALID_LINK_SETTINGS;
+ goto out;
}
/*
* Validate the requested mode. Strict IEEE mode does not allow
- * ixgbe_fc_rx_pause because it will cause testing anomalies.
+ * ixgbe_fc_rx_pause because it will cause us to fail at UNH.
*/
if (hw->fc.strict_ieee && hw->fc.requested_mode == ixgbe_fc_rx_pause) {
hw_dbg(hw, "ixgbe_fc_rx_pause not valid in strict "
hw->fc.requested_mode = ixgbe_fc_full;
/*
- * Save off the requested flow control mode for use later. Depending
- * on the link partner's capabilities, we may or may not use this mode.
+ * Set up the 1G flow control advertisement registers so the HW will be
+ * able to do fc autoneg once the cable is plugged in. If we end up
+ * using 10g instead, this is harmless.
*/
- hw->fc.current_mode = hw->fc.requested_mode;
-
- /* Decide whether to use autoneg or not. */
- hw->mac.ops.check_link(hw, &speed, &link_up, false);
- if (!hw->fc.disable_fc_autoneg && hw->phy.multispeed_fiber &&
- (speed == IXGBE_LINK_SPEED_1GB_FULL))
- ret_val = ixgbe_fc_autoneg(hw);
+ reg = IXGBE_READ_REG(hw, IXGBE_PCS1GANA);
- if (ret_val)
+ /*
+ * The possible values of fc.requested_mode are:
+ * 0: Flow control is completely disabled
+ * 1: Rx flow control is enabled (we can receive pause frames,
+ * but not send pause frames).
+ * 2: Tx flow control is enabled (we can send pause frames but
+ * we do not support receiving pause frames).
+ * 3: Both Rx and Tx flow control (symmetric) are enabled.
+#ifdef CONFIG_DCB
+ * 4: Priority Flow Control is enabled.
+#endif
+ * other: Invalid.
+ */
+ switch (hw->fc.requested_mode) {
+ case ixgbe_fc_none:
+ /* Flow control completely disabled by software override. */
+ reg &= ~(IXGBE_PCS1GANA_SYM_PAUSE | IXGBE_PCS1GANA_ASM_PAUSE);
+ break;
+ case ixgbe_fc_rx_pause:
+ /*
+ * Rx Flow control is enabled and Tx Flow control is
+ * disabled by software override. Since there really
+ * isn't a way to advertise that we are capable of RX
+ * Pause ONLY, we will advertise that we support both
+ * symmetric and asymmetric Rx PAUSE. Later, we will
+ * disable the adapter's ability to send PAUSE frames.
+ */
+ reg |= (IXGBE_PCS1GANA_SYM_PAUSE | IXGBE_PCS1GANA_ASM_PAUSE);
+ break;
+ case ixgbe_fc_tx_pause:
+ /*
+ * Tx Flow control is enabled, and Rx Flow control is
+ * disabled by software override.
+ */
+ reg |= (IXGBE_PCS1GANA_ASM_PAUSE);
+ reg &= ~(IXGBE_PCS1GANA_SYM_PAUSE);
+ break;
+ case ixgbe_fc_full:
+ /* Flow control (both Rx and Tx) is enabled by SW override. */
+ reg |= (IXGBE_PCS1GANA_SYM_PAUSE | IXGBE_PCS1GANA_ASM_PAUSE);
+ break;
+#ifdef CONFIG_DCB
+ case ixgbe_fc_pfc:
goto out;
+ break;
+#endif /* CONFIG_DCB */
+ default:
+ hw_dbg(hw, "Flow control param set incorrectly\n");
+ ret_val = -IXGBE_ERR_CONFIG;
+ goto out;
+ break;
+ }
+
+ IXGBE_WRITE_REG(hw, IXGBE_PCS1GANA, reg);
+ reg = IXGBE_READ_REG(hw, IXGBE_PCS1GLCTL);
- ret_val = ixgbe_fc_enable(hw, packetbuf_num);
+ /* Enable and restart autoneg to inform the link partner */
+ reg |= IXGBE_PCS1GLCTL_AN_ENABLE | IXGBE_PCS1GLCTL_AN_RESTART;
+
+ /* Disable AN timeout */
+ if (hw->fc.strict_ieee)
+ reg &= ~IXGBE_PCS1GLCTL_AN_1G_TIMEOUT_EN;
+
+ IXGBE_WRITE_REG(hw, IXGBE_PCS1GLCTL, reg);
+ hw_dbg(hw, "Set up FC; PCS1GLCTL = 0x%08X\n", reg);
out:
return ret_val;
git://ftp.safe.ca / safe / jmp / linux-2.6 / commitdiff