cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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nfd3.h (3365B)


      1/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
      2/* Copyright (C) 2015-2019 Netronome Systems, Inc. */
      3
      4#ifndef _NFP_DP_NFD3_H_
      5#define _NFP_DP_NFD3_H_
      6
      7struct sk_buff;
      8struct net_device;
      9
     10/* TX descriptor format */
     11
     12#define NFD3_DESC_TX_EOP		BIT(7)
     13#define NFD3_DESC_TX_OFFSET_MASK	GENMASK(6, 0)
     14#define NFD3_DESC_TX_MSS_MASK		GENMASK(13, 0)
     15
     16/* Flags in the host TX descriptor */
     17#define NFD3_DESC_TX_CSUM		BIT(7)
     18#define NFD3_DESC_TX_IP4_CSUM		BIT(6)
     19#define NFD3_DESC_TX_TCP_CSUM		BIT(5)
     20#define NFD3_DESC_TX_UDP_CSUM		BIT(4)
     21#define NFD3_DESC_TX_VLAN		BIT(3)
     22#define NFD3_DESC_TX_LSO		BIT(2)
     23#define NFD3_DESC_TX_ENCAP		BIT(1)
     24#define NFD3_DESC_TX_O_IP4_CSUM	BIT(0)
     25
     26struct nfp_nfd3_tx_desc {
     27	union {
     28		struct {
     29			u8 dma_addr_hi; /* High bits of host buf address */
     30			__le16 dma_len;	/* Length to DMA for this desc */
     31			u8 offset_eop;	/* Offset in buf where pkt starts +
     32					 * highest bit is eop flag.
     33					 */
     34			__le32 dma_addr_lo; /* Low 32bit of host buf addr */
     35
     36			__le16 mss;	/* MSS to be used for LSO */
     37			u8 lso_hdrlen;	/* LSO, TCP payload offset */
     38			u8 flags;	/* TX Flags, see @NFD3_DESC_TX_* */
     39			union {
     40				struct {
     41					u8 l3_offset; /* L3 header offset */
     42					u8 l4_offset; /* L4 header offset */
     43				};
     44				__le16 vlan; /* VLAN tag to add if indicated */
     45			};
     46			__le16 data_len; /* Length of frame + meta data */
     47		} __packed;
     48		__le32 vals[4];
     49		__le64 vals8[2];
     50	};
     51};
     52
     53/**
     54 * struct nfp_nfd3_tx_buf - software TX buffer descriptor
     55 * @skb:	normal ring, sk_buff associated with this buffer
     56 * @frag:	XDP ring, page frag associated with this buffer
     57 * @xdp:	XSK buffer pool handle (for AF_XDP)
     58 * @dma_addr:	DMA mapping address of the buffer
     59 * @fidx:	Fragment index (-1 for the head and [0..nr_frags-1] for frags)
     60 * @pkt_cnt:	Number of packets to be produced out of the skb associated
     61 *		with this buffer (valid only on the head's buffer).
     62 *		Will be 1 for all non-TSO packets.
     63 * @is_xsk_tx:	Flag if buffer is a RX buffer after a XDP_TX action and not a
     64 *		buffer from the TX queue (for AF_XDP).
     65 * @real_len:	Number of bytes which to be produced out of the skb (valid only
     66 *		on the head's buffer). Equal to skb->len for non-TSO packets.
     67 */
     68struct nfp_nfd3_tx_buf {
     69	union {
     70		struct sk_buff *skb;
     71		void *frag;
     72		struct xdp_buff *xdp;
     73	};
     74	dma_addr_t dma_addr;
     75	union {
     76		struct {
     77			short int fidx;
     78			u16 pkt_cnt;
     79		};
     80		struct {
     81			bool is_xsk_tx;
     82		};
     83	};
     84	u32 real_len;
     85};
     86
     87void
     88nfp_nfd3_rx_csum(const struct nfp_net_dp *dp, struct nfp_net_r_vector *r_vec,
     89		 const struct nfp_net_rx_desc *rxd,
     90		 const struct nfp_meta_parsed *meta, struct sk_buff *skb);
     91bool
     92nfp_nfd3_parse_meta(struct net_device *netdev, struct nfp_meta_parsed *meta,
     93		    void *data, void *pkt, unsigned int pkt_len, int meta_len);
     94void nfp_nfd3_tx_complete(struct nfp_net_tx_ring *tx_ring, int budget);
     95int nfp_nfd3_poll(struct napi_struct *napi, int budget);
     96netdev_tx_t nfp_nfd3_tx(struct sk_buff *skb, struct net_device *netdev);
     97bool
     98nfp_nfd3_ctrl_tx_one(struct nfp_net *nn, struct nfp_net_r_vector *r_vec,
     99		     struct sk_buff *skb, bool old);
    100void nfp_nfd3_ctrl_poll(struct tasklet_struct *t);
    101void nfp_nfd3_rx_ring_fill_freelist(struct nfp_net_dp *dp,
    102				    struct nfp_net_rx_ring *rx_ring);
    103void nfp_nfd3_xsk_tx_free(struct nfp_nfd3_tx_buf *txbuf);
    104int nfp_nfd3_xsk_poll(struct napi_struct *napi, int budget);
    105
    106#endif