@@ -1481,13 +1481,13 @@ static int e1000_link_test(struct e1000_adapter *adapter, u64 *data)
*data = 0;
if (hw->media_type == e1000_media_type_internal_serdes) {
int i = 0;
- hw->serdes_link_down = true;
+ hw->serdes_has_link = false;
/* On some blade server designs, link establishment
* could take as long as 2-3 minutes */
do {
e1000_check_for_link(hw);
- if (!hw->serdes_link_down)
+ if (hw->serdes_has_link)
return *data;
msleep(20);
} while (i++ < 3750);
@@ -2136,6 +2136,116 @@ static s32 e1000_config_fc_after_link_up(struct e1000_hw *hw)
return E1000_SUCCESS;
}
+/**
+ * e1000_check_for_serdes_link_generic - Check for link (Serdes)
+ * @hw: pointer to the HW structure
+ *
+ * Checks for link up on the hardware. If link is not up and we have
+ * a signal, then we need to force link up.
+ **/
+s32 e1000_check_for_serdes_link_generic(struct e1000_hw *hw)
+{
+ u32 rxcw;
+ u32 ctrl;
+ u32 status;
+ s32 ret_val = E1000_SUCCESS;
+
+ DEBUGFUNC("e1000_check_for_serdes_link_generic");
+
+ ctrl = er32(CTRL);
+ status = er32(STATUS);
+ rxcw = er32(RXCW);
+
+ /*
+ * If we don't have link (auto-negotiation failed or link partner
+ * cannot auto-negotiate), and our link partner is not trying to
+ * auto-negotiate with us (we are receiving idles or data),
+ * we need to force link up. We also need to give auto-negotiation
+ * time to complete.
+ */
+ /* (ctrl & E1000_CTRL_SWDPIN1) == 1 == have signal */
+ if ((!(status & E1000_STATUS_LU)) && (!(rxcw & E1000_RXCW_C))) {
+ if (hw->autoneg_failed == 0) {
+ hw->autoneg_failed = 1;
+ goto out;
+ }
+ DEBUGOUT("NOT RXing /C/, disable AutoNeg and force link.\n");
+
+ /* Disable auto-negotiation in the TXCW register */
+ ew32(TXCW, (hw->txcw & ~E1000_TXCW_ANE));
+
+ /* Force link-up and also force full-duplex. */
+ ctrl = er32(CTRL);
+ ctrl |= (E1000_CTRL_SLU | E1000_CTRL_FD);
+ ew32(CTRL, ctrl);
+
+ /* Configure Flow Control after forcing link up. */
+ ret_val = e1000_config_fc_after_link_up(hw);
+ if (ret_val) {
+ DEBUGOUT("Error configuring flow control\n");
+ goto out;
+ }
+ } else if ((ctrl & E1000_CTRL_SLU) && (rxcw & E1000_RXCW_C)) {
+ /*
+ * If we are forcing link and we are receiving /C/ ordered
+ * sets, re-enable auto-negotiation in the TXCW register
+ * and disable forced link in the Device Control register
+ * in an attempt to auto-negotiate with our link partner.
+ */
+ DEBUGOUT("RXing /C/, enable AutoNeg and stop forcing link.\n");
+ ew32(TXCW, hw->txcw);
+ ew32(CTRL, (ctrl & ~E1000_CTRL_SLU));
+
+ hw->serdes_has_link = true;
+ } else if (!(E1000_TXCW_ANE & er32(TXCW))) {
+ /*
+ * If we force link for non-auto-negotiation switch, check
+ * link status based on MAC synchronization for internal
+ * serdes media type.
+ */
+ /* SYNCH bit and IV bit are sticky. */
+ udelay(10);
+ rxcw = er32(RXCW);
+ if (rxcw & E1000_RXCW_SYNCH) {
+ if (!(rxcw & E1000_RXCW_IV)) {
+ hw->serdes_has_link = true;
+ DEBUGOUT("SERDES: Link up - forced.\n");
+ }
+ } else {
+ hw->serdes_has_link = false;
+ DEBUGOUT("SERDES: Link down - force failed.\n");
+ }
+ }
+
+ if (E1000_TXCW_ANE & er32(TXCW)) {
+ status = er32(STATUS);
+ if (status & E1000_STATUS_LU) {
+ /* SYNCH bit and IV bit are sticky, so reread rxcw. */
+ udelay(10);
+ rxcw = er32(RXCW);
+ if (rxcw & E1000_RXCW_SYNCH) {
+ if (!(rxcw & E1000_RXCW_IV)) {
+ hw->serdes_has_link = true;
+ DEBUGOUT("SERDES: Link up - autoneg "
+ "completed sucessfully.\n");
+ } else {
+ hw->serdes_has_link = false;
+ DEBUGOUT("SERDES: Link down - invalid"
+ "codewords detected in autoneg.\n");
+ }
+ } else {
+ hw->serdes_has_link = false;
+ DEBUGOUT("SERDES: Link down - no sync.\n");
+ }
+ } else {
+ hw->serdes_has_link = false;
+ DEBUGOUT("SERDES: Link down - autoneg failed\n");
+ }
+ }
+
+out:
+ return ret_val;
+}
/******************************************************************************
* Checks to see if the link status of the hardware has changed.
*
@@ -2300,74 +2410,11 @@ s32 e1000_check_for_link(struct e1000_hw *hw)
}
}
}
- /* If we don't have link (auto-negotiation failed or link partner cannot
- * auto-negotiate), the cable is plugged in (we have signal), and our
- * link partner is not trying to auto-negotiate with us (we are receiving
- * idles or data), we need to force link up. We also need to give
- * auto-negotiation time to complete, in case the cable was just plugged
- * in. The autoneg_failed flag does this.
- */
- else if ((((hw->media_type == e1000_media_type_fiber) &&
- ((ctrl & E1000_CTRL_SWDPIN1) == signal)) ||
- (hw->media_type == e1000_media_type_internal_serdes)) &&
- (!(status & E1000_STATUS_LU)) &&
- (!(rxcw & E1000_RXCW_C))) {
- if (hw->autoneg_failed == 0) {
- hw->autoneg_failed = 1;
- return 0;
- }
- DEBUGOUT("NOT RXing /C/, disable AutoNeg and force link.\n");
-
- /* Disable auto-negotiation in the TXCW register */
- ew32(TXCW, (hw->txcw & ~E1000_TXCW_ANE));
- /* Force link-up and also force full-duplex. */
- ctrl = er32(CTRL);
- ctrl |= (E1000_CTRL_SLU | E1000_CTRL_FD);
- ew32(CTRL, ctrl);
-
- /* Configure Flow Control after forcing link up. */
- ret_val = e1000_config_fc_after_link_up(hw);
- if (ret_val) {
- DEBUGOUT("Error configuring flow control\n");
- return ret_val;
- }
- }
- /* If we are forcing link and we are receiving /C/ ordered sets, re-enable
- * auto-negotiation in the TXCW register and disable forced link in the
- * Device Control register in an attempt to auto-negotiate with our link
- * partner.
- */
- else if (((hw->media_type == e1000_media_type_fiber) ||
- (hw->media_type == e1000_media_type_internal_serdes)) &&
- (ctrl & E1000_CTRL_SLU) && (rxcw & E1000_RXCW_C)) {
- DEBUGOUT("RXing /C/, enable AutoNeg and stop forcing link.\n");
- ew32(TXCW, hw->txcw);
- ew32(CTRL, (ctrl & ~E1000_CTRL_SLU));
+ if ((hw->media_type == e1000_media_type_fiber) ||
+ (hw->media_type == e1000_media_type_internal_serdes))
+ e1000_check_for_serdes_link_generic(hw);
- hw->serdes_link_down = false;
- }
- /* If we force link for non-auto-negotiation switch, check link status
- * based on MAC synchronization for internal serdes media type.
- */
- else if ((hw->media_type == e1000_media_type_internal_serdes) &&
- !(E1000_TXCW_ANE & er32(TXCW))) {
- /* SYNCH bit and IV bit are sticky. */
- udelay(10);
- if (E1000_RXCW_SYNCH & er32(RXCW)) {
- if (!(rxcw & E1000_RXCW_IV)) {
- hw->serdes_link_down = false;
- DEBUGOUT("SERDES: Link is up.\n");
- }
- } else {
- hw->serdes_link_down = true;
- DEBUGOUT("SERDES: Link is down.\n");
- }
- }
- if ((hw->media_type == e1000_media_type_internal_serdes) &&
- (E1000_TXCW_ANE & er32(TXCW))) {
- hw->serdes_link_down = !(E1000_STATUS_LU & er32(STATUS));
- }
return E1000_SUCCESS;
}
@@ -1372,7 +1372,7 @@ struct e1000_hw {
e1000_smart_speed smart_speed;
e1000_dsp_config dsp_config_state;
bool get_link_status;
- bool serdes_link_down;
+ bool serdes_has_link;
bool tbi_compatibility_en;
bool tbi_compatibility_on;
bool laa_is_present;
@@ -2251,6 +2251,41 @@ static void e1000_82547_tx_fifo_stall(unsigned long data)
}
}
+static bool e1000_has_link(struct e1000_adapter *adapter)
+{
+ struct e1000_hw *hw = &adapter->hw;
+ bool link_active = false;
+ s32 ret_val = 0;
+
+ /* get_link_status is set on LSC (link status) interrupt or
+ * rx sequence error interrupt. get_link_status will stay
+ * false until the e1000_check_for_link establishes link
+ * for copper adapters ONLY
+ */
+ switch (hw->media_type) {
+ case e1000_media_type_copper:
+ if (hw->get_link_status) {
+ ret_val = e1000_check_for_link(hw);
+ link_active = !hw->get_link_status;
+ } else {
+ link_active = true;
+ }
+ break;
+ case e1000_media_type_fiber:
+ ret_val = e1000_check_for_link(hw);
+ link_active = !!(er32(STATUS) & E1000_STATUS_LU);
+ break;
+ case e1000_media_type_internal_serdes:
+ ret_val = e1000_check_for_link(hw);
+ link_active = hw->serdes_has_link;
+ break;
+ default:
+ break;
+ }
+
+ return link_active;
+}
+
/**
* e1000_watchdog - Timer Call-back
* @data: pointer to adapter cast into an unsigned long
@@ -2263,18 +2298,15 @@ static void e1000_watchdog(unsigned long data)
struct e1000_tx_ring *txdr = adapter->tx_ring;
u32 link, tctl;
- e1000_check_for_link(hw);
-
- if ((hw->media_type == e1000_media_type_internal_serdes) &&
- !(er32(TXCW) & E1000_TXCW_ANE))
- link = !hw->serdes_link_down;
- else
- link = er32(STATUS) & E1000_STATUS_LU;
+ link = e1000_has_link(adapter);
+ if ((netif_carrier_ok(netdev)) && link)
+ goto link_up;
if (link) {
if (!netif_carrier_ok(netdev)) {
u32 ctrl;
bool txb2b = true;
+ /* update snapshot of PHY registers on LSC */
e1000_get_speed_and_duplex(hw,
&adapter->link_speed,
&adapter->link_duplex);
@@ -2299,7 +2331,7 @@ static void e1000_watchdog(unsigned long data)
case SPEED_10:
txb2b = false;
netdev->tx_queue_len = 10;
- adapter->tx_timeout_factor = 8;
+ adapter->tx_timeout_factor = 16;
break;
case SPEED_100:
txb2b = false;
@@ -2335,6 +2367,7 @@ static void e1000_watchdog(unsigned long data)
e1000_smartspeed(adapter);
}
+link_up:
e1000_update_stats(adapter);
hw->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;