diff mbox

[net-next,2/6] igb: make rxcsum configuration seperate from multiqueue

Message ID 20090428083513.32417.95815.stgit@localhost.localdomain
State Accepted, archived
Delegated to: David Miller
Headers show

Commit Message

Kirsher, Jeffrey T April 28, 2009, 8:35 a.m. UTC 
From: Alexander Duyck <alexander.h.duyck@intel.com>

The igb driver was being incorrectly setup to only allow disabling receive
checksum if multiqueue was disabled.  This change corrects that so that
RXCSUM is configured regardless of queue configuration.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---

 drivers/net/igb/e1000_defines.h |    2 +-
 drivers/net/igb/igb_main.c      |   30 +++++++++++-------------------
 2 files changed, 12 insertions(+), 20 deletions(-)


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Comments

David Miller April 28, 2009, 8:54 a.m. UTC | #1 
From: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Date: Tue, 28 Apr 2009 01:35:14 -0700

> The igb driver was being incorrectly setup to only allow disabling receive
> checksum if multiqueue was disabled.  This change corrects that so that
> RXCSUM is configured regardless of queue configuration.
> 
> Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

Applied.
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diff mbox

Patch

diff --git a/drivers/net/igb/e1000_defines.h b/drivers/net/igb/e1000_defines.h
index ad2d319..65acbba 100644
--- a/drivers/net/igb/e1000_defines.h
+++ b/drivers/net/igb/e1000_defines.h
@@ -289,8 +289,8 @@ 
 #define E1000_SCTL_DISABLE_SERDES_LOOPBACK 0x0400
 
 /* Receive Checksum Control */
+#define E1000_RXCSUM_IPOFL     0x00000100   /* IPv4 checksum offload */
 #define E1000_RXCSUM_TUOFL     0x00000200   /* TCP / UDP checksum offload */
-#define E1000_RXCSUM_IPPCSE    0x00001000   /* IP payload checksum enable */
 #define E1000_RXCSUM_PCSD      0x00002000   /* packet checksum disabled */
 
 /* Header split receive */
diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index ab846ec..4ecf4df 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -2236,29 +2236,21 @@  static void igb_configure_rx(struct igb_adapter *adapter)
 		mrqc |= (E1000_MRQC_RSS_FIELD_IPV6_UDP_EX |
 			 E1000_MRQC_RSS_FIELD_IPV6_TCP_EX);
 
-
 		wr32(E1000_MRQC, mrqc);
-
-		/* Multiqueue and raw packet checksumming are mutually
-		 * exclusive.  Note that this not the same as TCP/IP
-		 * checksumming, which works fine. */
-		rxcsum = rd32(E1000_RXCSUM);
-		rxcsum |= E1000_RXCSUM_PCSD;
-		wr32(E1000_RXCSUM, rxcsum);
-	} else {
+	} else if (adapter->vfs_allocated_count) {
 		/* Enable multi-queue for sr-iov */
-		if (adapter->vfs_allocated_count)
-			wr32(E1000_MRQC, E1000_MRQC_ENABLE_VMDQ);
-		/* Enable Receive Checksum Offload for TCP and UDP */
-		rxcsum = rd32(E1000_RXCSUM);
-		if (adapter->rx_csum)
-			rxcsum |= E1000_RXCSUM_TUOFL | E1000_RXCSUM_IPPCSE;
-		else
-			rxcsum &= ~(E1000_RXCSUM_TUOFL | E1000_RXCSUM_IPPCSE);
-
-		wr32(E1000_RXCSUM, rxcsum);
+		wr32(E1000_MRQC, E1000_MRQC_ENABLE_VMDQ);
 	}
 
+	/* Enable Receive Checksum Offload for TCP and UDP */
+	rxcsum = rd32(E1000_RXCSUM);
+	/* Disable raw packet checksumming */
+	rxcsum |= E1000_RXCSUM_PCSD;
+	/* Don't need to set TUOFL or IPOFL, they default to 1 */
+	if (!adapter->rx_csum)
+		rxcsum &= ~(E1000_RXCSUM_TUOFL | E1000_RXCSUM_IPOFL);
+	wr32(E1000_RXCSUM, rxcsum);
+
 	/* Set the default pool for the PF's first queue */
 	igb_configure_vt_default_pool(adapter);