igb: add defaults for i210 TX/RX PBSIZE

Set the defaults on probe for the packet buffer size registers for the
i210.

Signed-off-by: Todd Fujinaka <todd.fujinaka@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

3 files changed, 13 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/igb/e1000_defines.h b/drivers/net/ethernet/intel/igb/e1000_defines.h
index f85be6695e44..11ffdbae9f92 100644
--- a/drivers/net/ethernet/intel/igb/e1000_defines.h
+++ b/drivers/net/ethernet/intel/igb/e1000_defines.h
@@ -329,6 +329,9 @@
 /* Timestamp in Rx buffer */
 #define E1000_RXPBS_CFG_TS_EN           0x80000000
 
+#define I210_RXPBSIZE_DEFAULT           0x000000A2 /* RXPBSIZE default */
+#define I210_TXPBSIZE_DEFAULT           0x04000014 /* TXPBSIZE default */
+
 /* SerDes Control */
 #define E1000_SCTL_DISABLE_SERDES_LOOPBACK 0x0400
 
diff --git a/drivers/net/ethernet/intel/igb/e1000_regs.h b/drivers/net/ethernet/intel/igb/e1000_regs.h
index 833bbb948d97..1cc4b1a7e597 100644
--- a/drivers/net/ethernet/intel/igb/e1000_regs.h
+++ b/drivers/net/ethernet/intel/igb/e1000_regs.h
@@ -192,6 +192,10 @@
                                     : (0x0E038 + ((_n) * 0x40)))
 #define E1000_TDWBAH(_n)  ((_n) < 4 ? (0x0383C + ((_n) * 0x100)) \
                                     : (0x0E03C + ((_n) * 0x40)))
+
+#define E1000_RXPBS     0x02404  /* Rx Packet Buffer Size - RW */
+#define E1000_TXPBS     0x03404  /* Tx Packet Buffer Size - RW */
+
 #define E1000_TDFH     0x03410  /* TX Data FIFO Head - RW */
 #define E1000_TDFT     0x03418  /* TX Data FIFO Tail - RW */
 #define E1000_TDFHS    0x03420  /* TX Data FIFO Head Saved - RW */
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index ea2868b22c2d..33b3a16dabe1 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -2433,6 +2433,12 @@ static int igb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
         /* get firmware version for ethtool -i */
         igb_set_fw_version(adapter);
 
+        /* configure RXPBSIZE and TXPBSIZE */
+        if (hw->mac.type == e1000_i210) {
+                wr32(E1000_RXPBS, I210_RXPBSIZE_DEFAULT);
+                wr32(E1000_TXPBS, I210_TXPBSIZE_DEFAULT);
+        }
+
         setup_timer(&adapter->watchdog_timer, igb_watchdog,
                     (unsigned long) adapter);
         setup_timer(&adapter->phy_info_timer, igb_update_phy_info,