e1000e: fix legacy interrupt handling in i219

This fix handles a hardware issue that prevented i219 from
working in legacy interrupts mode (IntMode=0)

Signed-off-by: Yanir Lubetkin <yanirx.lubetkin@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/e1000e/ich8lan.h b/drivers/net/ethernet/intel/e1000e/ich8lan.h
index 1500536..193c445 100644 (file)
--- a/drivers/net/ethernet/intel/e1000e/ich8lan.h
+++ b/drivers/net/ethernet/intel/e1000e/ich8lan.h
@@ -98,8 +98,11 @@
 #define E1000_FEXTNVM6_K1_OFF_ENABLE   0x80000000
 /* bit for disabling packet buffer read */
 #define E1000_FEXTNVM7_DISABLE_PB_READ 0x00040000
-
+#define E1000_FEXTNVM7_SIDE_CLK_UNGATE 0x00000004
 #define E1000_FEXTNVM7_DISABLE_SMB_PERST       0x00000020
+#define E1000_FEXTNVM9_IOSFSB_CLKGATE_DIS      0x00000800
+#define E1000_FEXTNVM9_IOSFSB_CLKREQ_DIS       0x00001000
+#define E1000_FEXTNVM11_DISABLE_PB_READ                0x00000200
 #define E1000_FEXTNVM11_DISABLE_MULR_FIX       0x00002000
 
 /* bit24: RXDCTL thresholds granularity: 0 - cache lines, 1 - descriptors */

diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c
index 4f029b6..5f94fdf 100644 (file)
--- a/drivers/net/ethernet/intel/e1000e/netdev.c
+++ b/drivers/net/ethernet/intel/e1000e/netdev.c
@@ -4120,6 +4120,20 @@ void e1000e_reset(struct e1000_adapter *adapter)
                phy_data &= ~IGP02E1000_PM_SPD;
                e1e_wphy(hw, IGP02E1000_PHY_POWER_MGMT, phy_data);
        }
+       if (hw->mac.type == e1000_pch_spt && adapter->int_mode == 0) {
+               u32 reg;
+
+               /* Fextnvm7 @ 0xe4[2] = 1 */
+               reg = er32(FEXTNVM7);
+               reg |= E1000_FEXTNVM7_SIDE_CLK_UNGATE;
+               ew32(FEXTNVM7, reg);
+               /* Fextnvm9 @ 0x5bb4[13:12] = 11 */
+               reg = er32(FEXTNVM9);
+               reg |= E1000_FEXTNVM9_IOSFSB_CLKGATE_DIS |
+                      E1000_FEXTNVM9_IOSFSB_CLKREQ_DIS;
+               ew32(FEXTNVM9, reg);
+       }
+
 }
 
 int e1000e_up(struct e1000_adapter *adapter)

diff --git a/drivers/net/ethernet/intel/e1000e/regs.h b/drivers/net/ethernet/intel/e1000e/regs.h
index 200a312..110e27e 100644 (file)
--- a/drivers/net/ethernet/intel/e1000e/regs.h
+++ b/drivers/net/ethernet/intel/e1000e/regs.h
@@ -38,6 +38,7 @@
 #define E1000_FEXTNVM4 0x00024 /* Future Extended NVM 4 - RW */
 #define E1000_FEXTNVM6 0x00010 /* Future Extended NVM 6 - RW */
 #define E1000_FEXTNVM7 0x000E4 /* Future Extended NVM 7 - RW */
+#define E1000_FEXTNVM9 0x5BB4  /* Future Extended NVM 9 - RW */
 #define E1000_FEXTNVM11        0x5BBC  /* Future Extended NVM 11 - RW */
 #define E1000_PCIEANACFG       0x00F18 /* PCIE Analog Config */
 #define E1000_FCT      0x00030 /* Flow Control Type - RW */