dm9000: add checksum offload support

Add checksum offload support for DM9000A and DM9000B chips.

v2 changes: added a local copy of ip_summed to save IO cycles in dm9000_send_packet
v3 changes: trans_start updating is removed.

Signed-off-by: Yeasah Pell <yeasah@comrex.com>
Signed-off-by: Mike Rapoport <mike@compulab.co.il>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 18 insertions, 0 deletions

diff --git a/drivers/net/dm9000.h b/drivers/net/dm9000.h
index ba25cf541420..80817c2edfb3 100644
--- a/drivers/net/dm9000.h
+++ b/drivers/net/dm9000.h
@@ -45,6 +45,10 @@
 #define DM9000_CHIPR           0x2C
 #define DM9000_SMCR            0x2F
 
+#define DM9000_ETXCSR          0x30
+#define DM9000_TCCR            0x31
+#define DM9000_RCSR            0x32
+
 #define CHIPR_DM9000A          0x19
 #define CHIPR_DM9000B          0x1B
 
@@ -131,7 +135,21 @@
 
 #define GPCR_GEP_CNTL       (1<<0)
 
+#define TCCR_IP             (1<<0)
+#define TCCR_TCP            (1<<1)
+#define TCCR_UDP            (1<<2)
+
+#define RCSR_UDP_BAD        (1<<7)
+#define RCSR_TCP_BAD        (1<<6)
+#define RCSR_IP_BAD         (1<<5)
+#define RCSR_UDP            (1<<4)
+#define RCSR_TCP            (1<<3)
+#define RCSR_IP             (1<<2)
+#define RCSR_CSUM           (1<<1)
+#define RCSR_DISCARD        (1<<0)
+
 #define DM9000_PKT_RDY          0x01    /* Packet ready to receive */
+#define DM9000_PKT_ERR          0x02
 #define DM9000_PKT_MAX          1536    /* Received packet max size */
 
 /* DM9000A / DM9000B definitions */