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authorClaudiu Manoil <claudiu.manoil@freescale.com>2013-08-30 15:01:15 +0300
committerDavid S. Miller <davem@davemloft.net>2013-09-03 22:14:28 -0400
commit50ad076ba43d88956707cd9d6849715de5e282bf (patch)
treea6f58ef984281520b61b9ebd2bda53aa624f8a2e /drivers/net/ethernet/freescale/gianfar.h
parent7a163bfb7ce50895bbe67300ea610d31b9c09230 (diff)
gianfar: Fix reported number of sent bytes to BQL
Fix the amount of sent bytes reported to BQL by reporting the number of bytes on wire in the xmit routine, and recording that value for each skb in order to be correctly confirmed on Tx confirmation cleanup. Reporting skb->len to BQL just before exiting xmit is not correct due to possible insertions of TOE block and alignment bytes in the skb->data, which are being stripped off by the controller before transmission on wire. This led to mismatch of (incorrectly) reported bytes to BQL b/w xmit and Tx confirmation, resulting in Tx timeout firing, for the h/w tx timestamping acceleration case. There's no easy way to obtain the number of bytes on wire in the Tx confirmation routine, so skb->cb is used to convey that information from xmit to Tx confirmation, for now (as proposed by Eric). Revived the currently unused GFAR_CB() construct for that purpose. Signed-off-by: Claudiu Manoil <claudiu.manoil@freescale.com> Cc: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/freescale/gianfar.h')
-rw-r--r--drivers/net/ethernet/freescale/gianfar.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/ethernet/freescale/gianfar.h b/drivers/net/ethernet/freescale/gianfar.h
index 46f56f36118f..04112b98ff5d 100644
--- a/drivers/net/ethernet/freescale/gianfar.h
+++ b/drivers/net/ethernet/freescale/gianfar.h
@@ -575,7 +575,7 @@ struct rxfcb {
};
struct gianfar_skb_cb {
- int alignamount;
+ unsigned int bytes_sent; /* bytes-on-wire (i.e. no FCB) */
};
#define GFAR_CB(skb) ((struct gianfar_skb_cb *)((skb)->cb))