summaryrefslogtreecommitdiffstats
path: root/drivers/net/ethernet/netronome/nfp/nfd3/nfd3.h
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/net/ethernet/netronome/nfp/nfd3/nfd3.h')
-rw-r--r--drivers/net/ethernet/netronome/nfp/nfd3/nfd3.h106
1 files changed, 106 insertions, 0 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/nfd3/nfd3.h b/drivers/net/ethernet/netronome/nfp/nfd3/nfd3.h
new file mode 100644
index 000000000..7a0df9e6c
--- /dev/null
+++ b/drivers/net/ethernet/netronome/nfp/nfd3/nfd3.h
@@ -0,0 +1,106 @@
+/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
+/* Copyright (C) 2015-2019 Netronome Systems, Inc. */
+
+#ifndef _NFP_DP_NFD3_H_
+#define _NFP_DP_NFD3_H_
+
+struct sk_buff;
+struct net_device;
+
+/* TX descriptor format */
+
+#define NFD3_DESC_TX_EOP BIT(7)
+#define NFD3_DESC_TX_OFFSET_MASK GENMASK(6, 0)
+#define NFD3_DESC_TX_MSS_MASK GENMASK(13, 0)
+
+/* Flags in the host TX descriptor */
+#define NFD3_DESC_TX_CSUM BIT(7)
+#define NFD3_DESC_TX_IP4_CSUM BIT(6)
+#define NFD3_DESC_TX_TCP_CSUM BIT(5)
+#define NFD3_DESC_TX_UDP_CSUM BIT(4)
+#define NFD3_DESC_TX_VLAN BIT(3)
+#define NFD3_DESC_TX_LSO BIT(2)
+#define NFD3_DESC_TX_ENCAP BIT(1)
+#define NFD3_DESC_TX_O_IP4_CSUM BIT(0)
+
+struct nfp_nfd3_tx_desc {
+ union {
+ struct {
+ u8 dma_addr_hi; /* High bits of host buf address */
+ __le16 dma_len; /* Length to DMA for this desc */
+ u8 offset_eop; /* Offset in buf where pkt starts +
+ * highest bit is eop flag.
+ */
+ __le32 dma_addr_lo; /* Low 32bit of host buf addr */
+
+ __le16 mss; /* MSS to be used for LSO */
+ u8 lso_hdrlen; /* LSO, TCP payload offset */
+ u8 flags; /* TX Flags, see @NFD3_DESC_TX_* */
+ union {
+ struct {
+ u8 l3_offset; /* L3 header offset */
+ u8 l4_offset; /* L4 header offset */
+ };
+ __le16 vlan; /* VLAN tag to add if indicated */
+ };
+ __le16 data_len; /* Length of frame + meta data */
+ } __packed;
+ __le32 vals[4];
+ __le64 vals8[2];
+ };
+};
+
+/**
+ * struct nfp_nfd3_tx_buf - software TX buffer descriptor
+ * @skb: normal ring, sk_buff associated with this buffer
+ * @frag: XDP ring, page frag associated with this buffer
+ * @xdp: XSK buffer pool handle (for AF_XDP)
+ * @dma_addr: DMA mapping address of the buffer
+ * @fidx: Fragment index (-1 for the head and [0..nr_frags-1] for frags)
+ * @pkt_cnt: Number of packets to be produced out of the skb associated
+ * with this buffer (valid only on the head's buffer).
+ * Will be 1 for all non-TSO packets.
+ * @is_xsk_tx: Flag if buffer is a RX buffer after a XDP_TX action and not a
+ * buffer from the TX queue (for AF_XDP).
+ * @real_len: Number of bytes which to be produced out of the skb (valid only
+ * on the head's buffer). Equal to skb->len for non-TSO packets.
+ */
+struct nfp_nfd3_tx_buf {
+ union {
+ struct sk_buff *skb;
+ void *frag;
+ struct xdp_buff *xdp;
+ };
+ dma_addr_t dma_addr;
+ union {
+ struct {
+ short int fidx;
+ u16 pkt_cnt;
+ };
+ struct {
+ bool is_xsk_tx;
+ };
+ };
+ u32 real_len;
+};
+
+void
+nfp_nfd3_rx_csum(const struct nfp_net_dp *dp, struct nfp_net_r_vector *r_vec,
+ const struct nfp_net_rx_desc *rxd,
+ const struct nfp_meta_parsed *meta, struct sk_buff *skb);
+bool
+nfp_nfd3_parse_meta(struct net_device *netdev, struct nfp_meta_parsed *meta,
+ void *data, void *pkt, unsigned int pkt_len, int meta_len);
+void nfp_nfd3_tx_complete(struct nfp_net_tx_ring *tx_ring, int budget);
+int nfp_nfd3_poll(struct napi_struct *napi, int budget);
+netdev_tx_t nfp_nfd3_tx(struct sk_buff *skb, struct net_device *netdev);
+bool
+nfp_nfd3_ctrl_tx_one(struct nfp_net *nn, struct nfp_net_r_vector *r_vec,
+ struct sk_buff *skb, bool old);
+void nfp_nfd3_ctrl_poll(struct tasklet_struct *t);
+void nfp_nfd3_rx_ring_fill_freelist(struct nfp_net_dp *dp,
+ struct nfp_net_rx_ring *rx_ring);
+void nfp_nfd3_xsk_tx_free(struct nfp_nfd3_tx_buf *txbuf);
+int nfp_nfd3_xsk_poll(struct napi_struct *napi, int budget);
+
+#endif