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cadence: Add LSO support.

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New Cadence GEM hardware support Large Segment Offload (LSO):
TCP segmentation offload (TSO) as well as UDP fragmentation
offload (UFO). Support for those features was added to the driver.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Rafal Ozieblo
2016-11-16 10:02:34 +00:00
committed by David S. Miller
parent 08348995c4
commit 1629dd4f76
2 changed files with 140 additions and 12 deletions
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14
drivers/net/ethernet/cadence/macb.h
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@@ -382,6 +382,10 @@
#define GEM_TX_PKT_BUFF_OFFSET 21
#define GEM_TX_PKT_BUFF_SIZE 1
/* Bitfields in DCFG6. */
#define GEM_PBUF_LSO_OFFSET 27
#define GEM_PBUF_LSO_SIZE 1
/* Constants for CLK */
#define MACB_CLK_DIV8 0
#define MACB_CLK_DIV16 1
@@ -414,6 +418,10 @@
#define MACB_CAPS_SG_DISABLED 0x40000000
#define MACB_CAPS_MACB_IS_GEM 0x80000000
/* LSO settings */
#define MACB_LSO_UFO_ENABLE 0x01
#define MACB_LSO_TSO_ENABLE 0x02
/* Bit manipulation macros */
#define MACB_BIT(name) \
(1 << MACB_##name##_OFFSET)
@@ -545,6 +553,12 @@ struct macb_dma_desc {
#define MACB_TX_LAST_SIZE 1
#define MACB_TX_NOCRC_OFFSET 16
#define MACB_TX_NOCRC_SIZE 1
#define MACB_MSS_MFS_OFFSET 16
#define MACB_MSS_MFS_SIZE 14
#define MACB_TX_LSO_OFFSET 17
#define MACB_TX_LSO_SIZE 2
#define MACB_TX_TCP_SEQ_SRC_OFFSET 19
#define MACB_TX_TCP_SEQ_SRC_SIZE 1
#define MACB_TX_BUF_EXHAUSTED_OFFSET 27
#define MACB_TX_BUF_EXHAUSTED_SIZE 1
#define MACB_TX_UNDERRUN_OFFSET 28