Author: bz
Date: Wed Nov 16 02:00:55 2011
New Revision: 227547
URL: http://svn.freebsd.org/changeset/base/227547
Log:
The maximum TSO frame size should be:
maximum IP datagram size (65535 bytes) +
Ethernet header size (14 bytes) +
2 * VLAN tag size (4 bytes) [1].
[1] We need to multiply by 2 to account for the double VLAN tag
provision added in IEEE 802.1ad.
Submitted by: David Somayajulu (david.somayajulu qlogic.com)
MFC after: 4 days
Modified:
head/sys/dev/qlxgb/qla_def.h
Modified: head/sys/dev/qlxgb/qla_def.h
==============================================================================
--- head/sys/dev/qlxgb/qla_def.h Wed Nov 16 02:00:27 2011
(r227546)
+++ head/sys/dev/qlxgb/qla_def.h Wed Nov 16 02:00:55 2011
(r227547)
@@ -86,7 +86,7 @@ typedef struct qla_tx_buf qla_tx_buf_t;
#define QLA_MAX_SEGMENTS 63 /* maximum # of segs in a sg list */
#define QLA_MAX_FRAME_SIZE MJUM9BYTES
#define QLA_STD_FRAME_SIZE 1514
-#define QLA_MAX_TSO_FRAME_SIZE (64 * 1024 - 1)
+#define QLA_MAX_TSO_FRAME_SIZE ((64 * 1024 - 1) + 22)
/* Number of MSIX/MSI Vectors required */
#define Q8_MSI_COUNT 4
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