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Diffstat (limited to 'drivers/net/ethernet/xilinx/xilinx_axienet.h')
-rw-r--r--drivers/net/ethernet/xilinx/xilinx_axienet.h35
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;
};
/**