cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

xdp_sock_drv.h (6203B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/* Interface for implementing AF_XDP zero-copy support in drivers.
      3 * Copyright(c) 2020 Intel Corporation.
      4 */
      5
      6#ifndef _LINUX_XDP_SOCK_DRV_H
      7#define _LINUX_XDP_SOCK_DRV_H
      8
      9#include <net/xdp_sock.h>
     10#include <net/xsk_buff_pool.h>
     11
     12#ifdef CONFIG_XDP_SOCKETS
     13
     14void xsk_tx_completed(struct xsk_buff_pool *pool, u32 nb_entries);
     15bool xsk_tx_peek_desc(struct xsk_buff_pool *pool, struct xdp_desc *desc);
     16u32 xsk_tx_peek_release_desc_batch(struct xsk_buff_pool *pool, u32 max);
     17void xsk_tx_release(struct xsk_buff_pool *pool);
     18struct xsk_buff_pool *xsk_get_pool_from_qid(struct net_device *dev,
     19					    u16 queue_id);
     20void xsk_set_rx_need_wakeup(struct xsk_buff_pool *pool);
     21void xsk_set_tx_need_wakeup(struct xsk_buff_pool *pool);
     22void xsk_clear_rx_need_wakeup(struct xsk_buff_pool *pool);
     23void xsk_clear_tx_need_wakeup(struct xsk_buff_pool *pool);
     24bool xsk_uses_need_wakeup(struct xsk_buff_pool *pool);
     25
     26static inline u32 xsk_pool_get_headroom(struct xsk_buff_pool *pool)
     27{
     28	return XDP_PACKET_HEADROOM + pool->headroom;
     29}
     30
     31static inline u32 xsk_pool_get_chunk_size(struct xsk_buff_pool *pool)
     32{
     33	return pool->chunk_size;
     34}
     35
     36static inline u32 xsk_pool_get_rx_frame_size(struct xsk_buff_pool *pool)
     37{
     38	return xsk_pool_get_chunk_size(pool) - xsk_pool_get_headroom(pool);
     39}
     40
     41static inline void xsk_pool_set_rxq_info(struct xsk_buff_pool *pool,
     42					 struct xdp_rxq_info *rxq)
     43{
     44	xp_set_rxq_info(pool, rxq);
     45}
     46
     47static inline void xsk_pool_dma_unmap(struct xsk_buff_pool *pool,
     48				      unsigned long attrs)
     49{
     50	xp_dma_unmap(pool, attrs);
     51}
     52
     53static inline int xsk_pool_dma_map(struct xsk_buff_pool *pool,
     54				   struct device *dev, unsigned long attrs)
     55{
     56	struct xdp_umem *umem = pool->umem;
     57
     58	return xp_dma_map(pool, dev, attrs, umem->pgs, umem->npgs);
     59}
     60
     61static inline dma_addr_t xsk_buff_xdp_get_dma(struct xdp_buff *xdp)
     62{
     63	struct xdp_buff_xsk *xskb = container_of(xdp, struct xdp_buff_xsk, xdp);
     64
     65	return xp_get_dma(xskb);
     66}
     67
     68static inline dma_addr_t xsk_buff_xdp_get_frame_dma(struct xdp_buff *xdp)
     69{
     70	struct xdp_buff_xsk *xskb = container_of(xdp, struct xdp_buff_xsk, xdp);
     71
     72	return xp_get_frame_dma(xskb);
     73}
     74
     75static inline struct xdp_buff *xsk_buff_alloc(struct xsk_buff_pool *pool)
     76{
     77	return xp_alloc(pool);
     78}
     79
     80/* Returns as many entries as possible up to max. 0 <= N <= max. */
     81static inline u32 xsk_buff_alloc_batch(struct xsk_buff_pool *pool, struct xdp_buff **xdp, u32 max)
     82{
     83	return xp_alloc_batch(pool, xdp, max);
     84}
     85
     86static inline bool xsk_buff_can_alloc(struct xsk_buff_pool *pool, u32 count)
     87{
     88	return xp_can_alloc(pool, count);
     89}
     90
     91static inline void xsk_buff_free(struct xdp_buff *xdp)
     92{
     93	struct xdp_buff_xsk *xskb = container_of(xdp, struct xdp_buff_xsk, xdp);
     94
     95	xp_free(xskb);
     96}
     97
     98static inline void xsk_buff_set_size(struct xdp_buff *xdp, u32 size)
     99{
    100	xdp->data = xdp->data_hard_start + XDP_PACKET_HEADROOM;
    101	xdp->data_meta = xdp->data;
    102	xdp->data_end = xdp->data + size;
    103}
    104
    105static inline dma_addr_t xsk_buff_raw_get_dma(struct xsk_buff_pool *pool,
    106					      u64 addr)
    107{
    108	return xp_raw_get_dma(pool, addr);
    109}
    110
    111static inline void *xsk_buff_raw_get_data(struct xsk_buff_pool *pool, u64 addr)
    112{
    113	return xp_raw_get_data(pool, addr);
    114}
    115
    116static inline void xsk_buff_dma_sync_for_cpu(struct xdp_buff *xdp, struct xsk_buff_pool *pool)
    117{
    118	struct xdp_buff_xsk *xskb = container_of(xdp, struct xdp_buff_xsk, xdp);
    119
    120	if (!pool->dma_need_sync)
    121		return;
    122
    123	xp_dma_sync_for_cpu(xskb);
    124}
    125
    126static inline void xsk_buff_raw_dma_sync_for_device(struct xsk_buff_pool *pool,
    127						    dma_addr_t dma,
    128						    size_t size)
    129{
    130	xp_dma_sync_for_device(pool, dma, size);
    131}
    132
    133#else
    134
    135static inline void xsk_tx_completed(struct xsk_buff_pool *pool, u32 nb_entries)
    136{
    137}
    138
    139static inline bool xsk_tx_peek_desc(struct xsk_buff_pool *pool,
    140				    struct xdp_desc *desc)
    141{
    142	return false;
    143}
    144
    145static inline u32 xsk_tx_peek_release_desc_batch(struct xsk_buff_pool *pool, u32 max)
    146{
    147	return 0;
    148}
    149
    150static inline void xsk_tx_release(struct xsk_buff_pool *pool)
    151{
    152}
    153
    154static inline struct xsk_buff_pool *
    155xsk_get_pool_from_qid(struct net_device *dev, u16 queue_id)
    156{
    157	return NULL;
    158}
    159
    160static inline void xsk_set_rx_need_wakeup(struct xsk_buff_pool *pool)
    161{
    162}
    163
    164static inline void xsk_set_tx_need_wakeup(struct xsk_buff_pool *pool)
    165{
    166}
    167
    168static inline void xsk_clear_rx_need_wakeup(struct xsk_buff_pool *pool)
    169{
    170}
    171
    172static inline void xsk_clear_tx_need_wakeup(struct xsk_buff_pool *pool)
    173{
    174}
    175
    176static inline bool xsk_uses_need_wakeup(struct xsk_buff_pool *pool)
    177{
    178	return false;
    179}
    180
    181static inline u32 xsk_pool_get_headroom(struct xsk_buff_pool *pool)
    182{
    183	return 0;
    184}
    185
    186static inline u32 xsk_pool_get_chunk_size(struct xsk_buff_pool *pool)
    187{
    188	return 0;
    189}
    190
    191static inline u32 xsk_pool_get_rx_frame_size(struct xsk_buff_pool *pool)
    192{
    193	return 0;
    194}
    195
    196static inline void xsk_pool_set_rxq_info(struct xsk_buff_pool *pool,
    197					 struct xdp_rxq_info *rxq)
    198{
    199}
    200
    201static inline void xsk_pool_dma_unmap(struct xsk_buff_pool *pool,
    202				      unsigned long attrs)
    203{
    204}
    205
    206static inline int xsk_pool_dma_map(struct xsk_buff_pool *pool,
    207				   struct device *dev, unsigned long attrs)
    208{
    209	return 0;
    210}
    211
    212static inline dma_addr_t xsk_buff_xdp_get_dma(struct xdp_buff *xdp)
    213{
    214	return 0;
    215}
    216
    217static inline dma_addr_t xsk_buff_xdp_get_frame_dma(struct xdp_buff *xdp)
    218{
    219	return 0;
    220}
    221
    222static inline struct xdp_buff *xsk_buff_alloc(struct xsk_buff_pool *pool)
    223{
    224	return NULL;
    225}
    226
    227static inline u32 xsk_buff_alloc_batch(struct xsk_buff_pool *pool, struct xdp_buff **xdp, u32 max)
    228{
    229	return 0;
    230}
    231
    232static inline bool xsk_buff_can_alloc(struct xsk_buff_pool *pool, u32 count)
    233{
    234	return false;
    235}
    236
    237static inline void xsk_buff_free(struct xdp_buff *xdp)
    238{
    239}
    240
    241static inline void xsk_buff_set_size(struct xdp_buff *xdp, u32 size)
    242{
    243}
    244
    245static inline dma_addr_t xsk_buff_raw_get_dma(struct xsk_buff_pool *pool,
    246					      u64 addr)
    247{
    248	return 0;
    249}
    250
    251static inline void *xsk_buff_raw_get_data(struct xsk_buff_pool *pool, u64 addr)
    252{
    253	return NULL;
    254}
    255
    256static inline void xsk_buff_dma_sync_for_cpu(struct xdp_buff *xdp, struct xsk_buff_pool *pool)
    257{
    258}
    259
    260static inline void xsk_buff_raw_dma_sync_for_device(struct xsk_buff_pool *pool,
    261						    dma_addr_t dma,
    262						    size_t size)
    263{
    264}
    265
    266#endif /* CONFIG_XDP_SOCKETS */
    267
    268#endif /* _LINUX_XDP_SOCK_DRV_H */