e1000: Fixed the following issues with ESB2 (requires ESB2 support):

- Add restriction for ESB2 to MTU size <=9216
- Removed FIFO errors which were not being used
- Fixed issues with loopback
- Power management change for saving state and config space
- WA to disable recieves and reset device on link loss.  Reset needed to be done outside the interrupt context - modified existing tx_timeout_task

Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: John Ronciak <john.ronciak@intel.com>

1 files changed, 54 insertions, 11 deletions

diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
index 3acbffd5bde3..431b03ee077e 100644
--- a/drivers/net/e1000/e1000_main.c
+++ b/drivers/net/e1000/e1000_main.c
@@ -245,7 +245,7 @@ void e1000_set_ethtool_ops(struct net_device *netdev);
 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
 static void e1000_tx_timeout(struct net_device *dev);
-static void e1000_tx_timeout_task(struct net_device *dev);
+static void e1000_reset_task(struct net_device *dev);
 static void e1000_smartspeed(struct e1000_adapter *adapter);
 static inline int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
                                               struct sk_buff *skb);
@@ -611,7 +611,10 @@ e1000_reset(struct e1000_adapter *adapter)
 
         adapter->hw.fc_high_water = fc_high_water_mark;
         adapter->hw.fc_low_water = fc_high_water_mark - 8;
-        adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
+        if (adapter->hw.mac_type == e1000_80003es2lan)
+                adapter->hw.fc_pause_time = 0xFFFF;
+        else
+                adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
         adapter->hw.fc_send_xon = 1;
         adapter->hw.fc = adapter->hw.original_fc;
 
@@ -828,8 +831,8 @@ e1000_probe(struct pci_dev *pdev,
         adapter->phy_info_timer.function = &e1000_update_phy_info;
         adapter->phy_info_timer.data = (unsigned long) adapter;
 
-        INIT_WORK(&adapter->tx_timeout_task,
-                (void (*)(void *))e1000_tx_timeout_task, netdev);
+        INIT_WORK(&adapter->reset_task,
+                (void (*)(void *))e1000_reset_task, netdev);
 
         /* we're going to reset, so assume we have no link for now */
 
@@ -1390,6 +1393,10 @@ e1000_configure_tx(struct e1000_adapter *adapter)
                 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
                 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
                 break;
+        case e1000_80003es2lan:
+                ipgr1 = DEFAULT_82543_TIPG_IPGR1;
+                ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2;
+                break;
         default:
                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
                 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
@@ -1429,6 +1436,15 @@ e1000_configure_tx(struct e1000_adapter *adapter)
                 else
                         tarc |= (1 << 28);
                 E1000_WRITE_REG(hw, TARC1, tarc);
+        } else if (hw->mac_type == e1000_80003es2lan) {
+                tarc = E1000_READ_REG(hw, TARC0);
+                tarc |= 1;
+                if (hw->media_type == e1000_media_type_internal_serdes)
+                        tarc |= (1 << 20);
+                E1000_WRITE_REG(hw, TARC0, tarc);
+                tarc = E1000_READ_REG(hw, TARC1);
+                tarc |= 1;
+                E1000_WRITE_REG(hw, TARC1, tarc);
         }
 
         e1000_config_collision_dist(hw);
@@ -2349,6 +2365,16 @@ e1000_watchdog_task(struct e1000_adapter *adapter)
                         netif_carrier_off(netdev);
                         netif_stop_queue(netdev);
                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
+
+                        /* 80003ES2LAN workaround--
+                         * For packet buffer work-around on link down event;
+                         * disable receives in the ISR and
+                         * reset device here in the watchdog
+                         */
+                        if (adapter->hw.mac_type == e1000_80003es2lan) {
+                                /* reset device */
+                                schedule_work(&adapter->reset_task);
+                        }
                 }
 
                 e1000_smartspeed(adapter);
@@ -2374,7 +2400,8 @@ e1000_watchdog_task(struct e1000_adapter *adapter)
                          * but we've got queued Tx work that's never going
                          * to get done, so reset controller to flush Tx.
                          * (Do the reset outside of interrupt context). */
-                        schedule_work(&adapter->tx_timeout_task);
+                        adapter->tx_timeout_count++;
+                        schedule_work(&adapter->reset_task);
                 }
         }
 
@@ -2940,15 +2967,15 @@ e1000_tx_timeout(struct net_device *netdev)
         struct e1000_adapter *adapter = netdev_priv(netdev);
 
         /* Do the reset outside of interrupt context */
-        schedule_work(&adapter->tx_timeout_task);
+        adapter->tx_timeout_count++;
+        schedule_work(&adapter->reset_task);
 }
 
 static void
-e1000_tx_timeout_task(struct net_device *netdev)
+e1000_reset_task(struct net_device *netdev)
 {
         struct e1000_adapter *adapter = netdev_priv(netdev);
 
-        adapter->tx_timeout_count++;
         e1000_down(adapter);
         e1000_up(adapter);
 }
@@ -3016,6 +3043,7 @@ e1000_change_mtu(struct net_device *netdev, int new_mtu)
                 /* fall through to get support */
         case e1000_82571:
         case e1000_82572:
+        case e1000_80003es2lan:
 #define MAX_STD_JUMBO_FRAME_SIZE 9234
                 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
                         DPRINTK(PROBE, ERR, "MTU > 9216 not supported.\n");
@@ -3169,11 +3197,15 @@ e1000_update_stats(struct e1000_adapter *adapter)
 
         /* Rx Errors */
 
+        /* RLEC on some newer hardware can be incorrect so build
+        * our own version based on RUC and ROC */
         adapter->net_stats.rx_errors = adapter->stats.rxerrc +
                 adapter->stats.crcerrs + adapter->stats.algnerrc +
-                adapter->stats.rlec + adapter->stats.cexterr;
+                adapter->stats.ruc + adapter->stats.roc +
+                adapter->stats.cexterr;
         adapter->net_stats.rx_dropped = 0;
-        adapter->net_stats.rx_length_errors = adapter->stats.rlec;
+        adapter->net_stats.rx_length_errors = adapter->stats.ruc +
+                                              adapter->stats.roc;
         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
         adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
         adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
@@ -3219,7 +3251,7 @@ e1000_intr(int irq, void *data, struct pt_regs *regs)
         struct net_device *netdev = data;
         struct e1000_adapter *adapter = netdev_priv(netdev);
         struct e1000_hw *hw = &adapter->hw;
-        uint32_t icr = E1000_READ_REG(hw, ICR);
+        uint32_t rctl, icr = E1000_READ_REG(hw, ICR);
 #ifndef CONFIG_E1000_NAPI
         int i;
 #else
@@ -3241,6 +3273,17 @@ e1000_intr(int irq, void *data, struct pt_regs *regs)
 
         if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
                 hw->get_link_status = 1;
+                /* 80003ES2LAN workaround--
+                 * For packet buffer work-around on link down event;
+                 * disable receives here in the ISR and
+                 * reset adapter in watchdog
+                 */
+                if (netif_carrier_ok(netdev) &&
+                    (adapter->hw.mac_type == e1000_80003es2lan)) {
+                        /* disable receives */
+                        rctl = E1000_READ_REG(hw, RCTL);
+                        E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
+                }
                 mod_timer(&adapter->watchdog_timer, jiffies);
         }