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/* 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);
#ifndef CONFIG_NFP_NET_IPSEC
static inline void nfp_nfd3_ipsec_tx(struct nfp_nfd3_tx_desc *txd, struct sk_buff *skb)
{
}
#else
void nfp_nfd3_ipsec_tx(struct nfp_nfd3_tx_desc *txd, struct sk_buff *skb);
#endif
#endif
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