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1/* SPDX-License-Identifier: GPL-2.0-only */2/****************************************************************************3 * Driver for Solarflare network controllers and boards4 * Copyright 2005-2006 Fen Systems Ltd.5 * Copyright 2006-2013 Solarflare Communications Inc.6 */7 8#ifndef EFX_EFX_H9#define EFX_EFX_H10 11#include <linux/indirect_call_wrapper.h>12#include "net_driver.h"13#include "ef100_rx.h"14#include "ef100_tx.h"15#include "efx_common.h"16#include "filter.h"17 18int efx_net_open(struct net_device *net_dev);19int efx_net_stop(struct net_device *net_dev);20 21/* TX */22void efx_init_tx_queue_core_txq(struct efx_tx_queue *tx_queue);23netdev_tx_t efx_hard_start_xmit(struct sk_buff *skb,24 struct net_device *net_dev);25netdev_tx_t __efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb);26static inline netdev_tx_t efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb)27{28 return INDIRECT_CALL_2(tx_queue->efx->type->tx_enqueue,29 ef100_enqueue_skb, __efx_enqueue_skb,30 tx_queue, skb);31}32void efx_xmit_done_single(struct efx_tx_queue *tx_queue);33extern unsigned int efx_piobuf_size;34 35/* RX */36void __efx_rx_packet(struct efx_channel *channel);37void efx_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index,38 unsigned int n_frags, unsigned int len, u16 flags);39static inline void efx_rx_flush_packet(struct efx_channel *channel)40{41 if (channel->rx_pkt_n_frags)42 INDIRECT_CALL_2(channel->efx->type->rx_packet,43 __ef100_rx_packet, __efx_rx_packet,44 channel);45}46static inline bool efx_rx_buf_hash_valid(struct efx_nic *efx, const u8 *prefix)47{48 if (efx->type->rx_buf_hash_valid)49 return INDIRECT_CALL_1(efx->type->rx_buf_hash_valid,50 ef100_rx_buf_hash_valid,51 prefix);52 return true;53}54 55/* Maximum number of TCP segments we support for soft-TSO */56#define EFX_TSO_MAX_SEGS 10057 58/* The smallest [rt]xq_entries that the driver supports. RX minimum59 * is a bit arbitrary. For TX, we must have space for at least 260 * TSO skbs.61 */62#define EFX_RXQ_MIN_ENT 128U63#define EFX_TXQ_MIN_ENT(efx) (2 * efx_tx_max_skb_descs(efx))64 65/* All EF10 architecture NICs steal one bit of the DMAQ size for various66 * other purposes when counting TxQ entries, so we halve the queue size.67 */68#define EFX_TXQ_MAX_ENT(efx) (EFX_WORKAROUND_EF10(efx) ? \69 EFX_MAX_DMAQ_SIZE / 2 : EFX_MAX_DMAQ_SIZE)70 71static inline bool efx_rss_enabled(struct efx_nic *efx)72{73 return efx->rss_spread > 1;74}75 76/* Filters */77 78/**79 * efx_filter_insert_filter - add or replace a filter80 * @efx: NIC in which to insert the filter81 * @spec: Specification for the filter82 * @replace_equal: Flag for whether the specified filter may replace an83 * existing filter with equal priority84 *85 * On success, return the filter ID.86 * On failure, return a negative error code.87 *88 * If existing filters have equal match values to the new filter spec,89 * then the new filter might replace them or the function might fail,90 * as follows.91 *92 * 1. If the existing filters have lower priority, or @replace_equal93 * is set and they have equal priority, replace them.94 *95 * 2. If the existing filters have higher priority, return -%EPERM.96 *97 * 3. If !efx_filter_is_mc_recipient(@spec), or the NIC does not98 * support delivery to multiple recipients, return -%EEXIST.99 *100 * This implies that filters for multiple multicast recipients must101 * all be inserted with the same priority and @replace_equal = %false.102 */103static inline s32 efx_filter_insert_filter(struct efx_nic *efx,104 struct efx_filter_spec *spec,105 bool replace_equal)106{107 return efx->type->filter_insert(efx, spec, replace_equal);108}109 110/**111 * efx_filter_remove_id_safe - remove a filter by ID, carefully112 * @efx: NIC from which to remove the filter113 * @priority: Priority of filter, as passed to @efx_filter_insert_filter114 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter115 *116 * This function will range-check @filter_id, so it is safe to call117 * with a value passed from userland.118 */119static inline int efx_filter_remove_id_safe(struct efx_nic *efx,120 enum efx_filter_priority priority,121 u32 filter_id)122{123 return efx->type->filter_remove_safe(efx, priority, filter_id);124}125 126/**127 * efx_filter_get_filter_safe - retrieve a filter by ID, carefully128 * @efx: NIC from which to remove the filter129 * @priority: Priority of filter, as passed to @efx_filter_insert_filter130 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter131 * @spec: Buffer in which to store filter specification132 *133 * This function will range-check @filter_id, so it is safe to call134 * with a value passed from userland.135 */136static inline int137efx_filter_get_filter_safe(struct efx_nic *efx,138 enum efx_filter_priority priority,139 u32 filter_id, struct efx_filter_spec *spec)140{141 return efx->type->filter_get_safe(efx, priority, filter_id, spec);142}143 144static inline u32 efx_filter_count_rx_used(struct efx_nic *efx,145 enum efx_filter_priority priority)146{147 return efx->type->filter_count_rx_used(efx, priority);148}149static inline u32 efx_filter_get_rx_id_limit(struct efx_nic *efx)150{151 return efx->type->filter_get_rx_id_limit(efx);152}153static inline s32 efx_filter_get_rx_ids(struct efx_nic *efx,154 enum efx_filter_priority priority,155 u32 *buf, u32 size)156{157 return efx->type->filter_get_rx_ids(efx, priority, buf, size);158}159 160/* RSS contexts */161static inline bool efx_rss_active(struct efx_rss_context_priv *ctx)162{163 return ctx->context_id != EFX_MCDI_RSS_CONTEXT_INVALID;164}165 166/* Ethtool support */167extern const struct ethtool_ops efx_ethtool_ops;168 169/* Global */170unsigned int efx_usecs_to_ticks(struct efx_nic *efx, unsigned int usecs);171unsigned int efx_ticks_to_usecs(struct efx_nic *efx, unsigned int ticks);172int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs,173 unsigned int rx_usecs, bool rx_adaptive,174 bool rx_may_override_tx);175void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs,176 unsigned int *rx_usecs, bool *rx_adaptive);177 178/* Update the generic software stats in the passed stats array */179void efx_update_sw_stats(struct efx_nic *efx, u64 *stats);180 181/* MTD */182#ifdef CONFIG_SFC_MTD183int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts,184 size_t n_parts, size_t sizeof_part);185static inline int efx_mtd_probe(struct efx_nic *efx)186{187 return efx->type->mtd_probe(efx);188}189void efx_mtd_rename(struct efx_nic *efx);190void efx_mtd_remove(struct efx_nic *efx);191#else192static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; }193static inline void efx_mtd_rename(struct efx_nic *efx) {}194static inline void efx_mtd_remove(struct efx_nic *efx) {}195#endif196 197#ifdef CONFIG_SFC_SRIOV198static inline unsigned int efx_vf_size(struct efx_nic *efx)199{200 return 1 << efx->vi_scale;201}202#endif203 204static inline void efx_device_detach_sync(struct efx_nic *efx)205{206 struct net_device *dev = efx->net_dev;207 208 /* We must stop reps (which use our TX) before we stop ourselves. */209 efx_detach_reps(efx);210 211 /* Lock/freeze all TX queues so that we can be sure the212 * TX scheduler is stopped when we're done and before213 * netif_device_present() becomes false.214 */215 netif_tx_lock_bh(dev);216 netif_device_detach(dev);217 netif_tx_unlock_bh(dev);218}219 220static inline void efx_device_attach_if_not_resetting(struct efx_nic *efx)221{222 if ((efx->state != STATE_DISABLED) && !efx->reset_pending) {223 netif_device_attach(efx->net_dev);224 if (efx->state == STATE_NET_UP)225 efx_attach_reps(efx);226 }227}228 229static inline bool efx_rwsem_assert_write_locked(struct rw_semaphore *sem)230{231 if (WARN_ON(down_read_trylock(sem))) {232 up_read(sem);233 return false;234 }235 return true;236}237 238int efx_xdp_tx_buffers(struct efx_nic *efx, int n, struct xdp_frame **xdpfs,239 bool flush);240 241#endif /* EFX_EFX_H */242