diff options
Diffstat (limited to 'drivers/net/ethernet/xilinx/xilinx_axienet.h')
| -rw-r--r-- | drivers/net/ethernet/xilinx/xilinx_axienet.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/net/ethernet/xilinx/xilinx_axienet.h b/drivers/net/ethernet/xilinx/xilinx_axienet.h index 575ff9de89..807ead6785 100644 --- a/drivers/net/ethernet/xilinx/xilinx_axienet.h +++ b/drivers/net/ethernet/xilinx/xilinx_axienet.h @@ -14,6 +14,7 @@ #include <linux/interrupt.h> #include <linux/if_vlan.h> #include <linux/phylink.h> +#include <linux/skbuff.h> /* Packet size info */ #define XAE_HDR_SIZE 14 /* Size of Ethernet header */ @@ -379,6 +380,22 @@ struct axidma_bd { #define XAE_NUM_MISC_CLOCKS 3 /** + * struct skbuf_dma_descriptor - skb for each dma descriptor + * @sgl: Pointer for sglist. + * @desc: Pointer to dma descriptor. + * @dma_address: dma address of sglist. + * @skb: Pointer to SKB transferred using DMA + * @sg_len: number of entries in the sglist. + */ +struct skbuf_dma_descriptor { + struct scatterlist sgl[MAX_SKB_FRAGS + 1]; + struct dma_async_tx_descriptor *desc; + dma_addr_t dma_address; + struct sk_buff *skb; + int sg_len; +}; + +/** * struct axienet_local - axienet private per device data * @ndev: Pointer for net_device to which it will be attached. * @dev: Pointer to device structure @@ -435,6 +452,15 @@ struct axidma_bd { * @coalesce_usec_rx: IRQ coalesce delay for RX * @coalesce_count_tx: Store the irq coalesce on TX side. * @coalesce_usec_tx: IRQ coalesce delay for TX + * @use_dmaengine: flag to check dmaengine framework usage. + * @tx_chan: TX DMA channel. + * @rx_chan: RX DMA channel. + * @tx_skb_ring: Pointer to TX skb ring buffer array. + * @rx_skb_ring: Pointer to RX skb ring buffer array. + * @tx_ring_head: TX skb ring buffer head index. + * @tx_ring_tail: TX skb ring buffer tail index. + * @rx_ring_head: RX skb ring buffer head index. + * @rx_ring_tail: RX skb ring buffer tail index. */ struct axienet_local { struct net_device *ndev; @@ -499,6 +525,15 @@ struct axienet_local { u32 coalesce_usec_rx; u32 coalesce_count_tx; u32 coalesce_usec_tx; + u8 use_dmaengine; + struct dma_chan *tx_chan; + struct dma_chan *rx_chan; + struct skbuf_dma_descriptor **tx_skb_ring; + struct skbuf_dma_descriptor **rx_skb_ring; + int tx_ring_head; + int tx_ring_tail; + int rx_ring_head; + int rx_ring_tail; }; /** |