diff options
| author | Iyappan Subramanian <isubramanian@apm.com> | 2015-08-26 11:48:05 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-08-27 13:51:38 -0700 |
| commit | 949c40bb16bcf5f9584ce585f8a477481ab6aa80 (patch) | |
| tree | 6a8cc11d041485e478630bc6f15a23b992763308 /drivers/net/ethernet/apm | |
| parent | 21c721fd0b991b1871ea5dd517be1b5375c5f8f7 (diff) | |
drivers: net: xgene: Preparatory patch for TSO support
- Rearranged descriptor writes
- Moved increment command write to xgene_enet_setup_tx_desc
Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/apm')
| -rw-r--r-- | drivers/net/ethernet/apm/xgene/xgene_enet_main.c | 29 | ||||
| -rw-r--r-- | drivers/net/ethernet/apm/xgene/xgene_enet_main.h | 1 |
2 files changed, 23 insertions, 7 deletions
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c index 4f68d19c45bd..652b4c3ff05c 100644 --- a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c +++ b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c @@ -219,6 +219,11 @@ out: return hopinfo; } +static u16 xgene_enet_encode_len(u16 len) +{ + return (len == BUFLEN_16K) ? 0 : len; +} + static int xgene_enet_setup_tx_desc(struct xgene_enet_desc_ring *tx_ring, struct sk_buff *skb) { @@ -227,27 +232,36 @@ static int xgene_enet_setup_tx_desc(struct xgene_enet_desc_ring *tx_ring, dma_addr_t dma_addr; u16 tail = tx_ring->tail; u64 hopinfo; + u32 len, hw_len; + u8 count = 1; raw_desc = &tx_ring->raw_desc[tail]; memset(raw_desc, 0, sizeof(struct xgene_enet_raw_desc)); - dma_addr = dma_map_single(dev, skb->data, skb->len, DMA_TO_DEVICE); + len = skb_headlen(skb); + hw_len = xgene_enet_encode_len(len); + + dma_addr = dma_map_single(dev, skb->data, len, DMA_TO_DEVICE); if (dma_mapping_error(dev, dma_addr)) { netdev_err(tx_ring->ndev, "DMA mapping error\n"); return -EINVAL; } /* Hardware expects descriptor in little endian format */ - raw_desc->m0 = cpu_to_le64(tail); raw_desc->m1 = cpu_to_le64(SET_VAL(DATAADDR, dma_addr) | - SET_VAL(BUFDATALEN, skb->len) | + SET_VAL(BUFDATALEN, hw_len) | SET_BIT(COHERENT)); + + raw_desc->m0 = cpu_to_le64(SET_VAL(USERINFO, tail)); hopinfo = xgene_enet_work_msg(skb); raw_desc->m3 = cpu_to_le64(SET_VAL(HENQNUM, tx_ring->dst_ring_num) | hopinfo); tx_ring->cp_ring->cp_skb[tail] = skb; - return 0; + tail = (tail + 1) & (tx_ring->slots - 1); + tx_ring->tail = tail; + + return count; } static netdev_tx_t xgene_enet_start_xmit(struct sk_buff *skb, @@ -257,6 +271,7 @@ static netdev_tx_t xgene_enet_start_xmit(struct sk_buff *skb, struct xgene_enet_desc_ring *tx_ring = pdata->tx_ring; struct xgene_enet_desc_ring *cp_ring = tx_ring->cp_ring; u32 tx_level, cq_level; + int count; tx_level = pdata->ring_ops->len(tx_ring); cq_level = pdata->ring_ops->len(cp_ring); @@ -266,14 +281,14 @@ static netdev_tx_t xgene_enet_start_xmit(struct sk_buff *skb, return NETDEV_TX_BUSY; } - if (xgene_enet_setup_tx_desc(tx_ring, skb)) { + count = xgene_enet_setup_tx_desc(tx_ring, skb); + if (count <= 0) { dev_kfree_skb_any(skb); return NETDEV_TX_OK; } - pdata->ring_ops->wr_cmd(tx_ring, 1); + pdata->ring_ops->wr_cmd(tx_ring, count); skb_tx_timestamp(skb); - tx_ring->tail = (tx_ring->tail + 1) & (tx_ring->slots - 1); pdata->stats.tx_packets++; pdata->stats.tx_bytes += skb->len; diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_main.h b/drivers/net/ethernet/apm/xgene/xgene_enet_main.h index 1c85fc87703a..2ac547e0c998 100644 --- a/drivers/net/ethernet/apm/xgene/xgene_enet_main.h +++ b/drivers/net/ethernet/apm/xgene/xgene_enet_main.h @@ -40,6 +40,7 @@ #define XGENE_DRV_VERSION "v1.0" #define XGENE_ENET_MAX_MTU 1536 #define SKB_BUFFER_SIZE (XGENE_ENET_MAX_MTU - NET_IP_ALIGN) +#define BUFLEN_16K (16 * 1024) #define NUM_PKT_BUF 64 #define NUM_BUFPOOL 32 |