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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 EF4_EFX_H9#define EF4_EFX_H10 11#include "net_driver.h"12#include "filter.h"13 14/* All controllers use BAR 0 for I/O space and BAR 2(&3) for memory */15/* All VFs use BAR 0/1 for memory */16#define EF4_MEM_BAR 217#define EF4_MEM_VF_BAR 018 19int ef4_net_open(struct net_device *net_dev);20int ef4_net_stop(struct net_device *net_dev);21 22/* TX */23int ef4_probe_tx_queue(struct ef4_tx_queue *tx_queue);24void ef4_remove_tx_queue(struct ef4_tx_queue *tx_queue);25void ef4_init_tx_queue(struct ef4_tx_queue *tx_queue);26void ef4_init_tx_queue_core_txq(struct ef4_tx_queue *tx_queue);27void ef4_fini_tx_queue(struct ef4_tx_queue *tx_queue);28netdev_tx_t ef4_hard_start_xmit(struct sk_buff *skb,29 struct net_device *net_dev);30netdev_tx_t ef4_enqueue_skb(struct ef4_tx_queue *tx_queue, struct sk_buff *skb);31void ef4_xmit_done(struct ef4_tx_queue *tx_queue, unsigned int index);32int ef4_setup_tc(struct net_device *net_dev, enum tc_setup_type type,33 void *type_data);34unsigned int ef4_tx_max_skb_descs(struct ef4_nic *efx);35extern bool ef4_separate_tx_channels;36 37/* RX */38void ef4_set_default_rx_indir_table(struct ef4_nic *efx);39void ef4_rx_config_page_split(struct ef4_nic *efx);40int ef4_probe_rx_queue(struct ef4_rx_queue *rx_queue);41void ef4_remove_rx_queue(struct ef4_rx_queue *rx_queue);42void ef4_init_rx_queue(struct ef4_rx_queue *rx_queue);43void ef4_fini_rx_queue(struct ef4_rx_queue *rx_queue);44void ef4_fast_push_rx_descriptors(struct ef4_rx_queue *rx_queue, bool atomic);45void ef4_rx_slow_fill(struct timer_list *t);46void __ef4_rx_packet(struct ef4_channel *channel);47void ef4_rx_packet(struct ef4_rx_queue *rx_queue, unsigned int index,48 unsigned int n_frags, unsigned int len, u16 flags);49static inline void ef4_rx_flush_packet(struct ef4_channel *channel)50{51 if (channel->rx_pkt_n_frags)52 __ef4_rx_packet(channel);53}54void ef4_schedule_slow_fill(struct ef4_rx_queue *rx_queue);55 56#define EF4_MAX_DMAQ_SIZE 4096UL57#define EF4_DEFAULT_DMAQ_SIZE 1024UL58#define EF4_MIN_DMAQ_SIZE 512UL59 60#define EF4_MAX_EVQ_SIZE 16384UL61#define EF4_MIN_EVQ_SIZE 512UL62 63/* Maximum number of TCP segments we support for soft-TSO */64#define EF4_TSO_MAX_SEGS 10065 66/* The smallest [rt]xq_entries that the driver supports. RX minimum67 * is a bit arbitrary. For TX, we must have space for at least 268 * TSO skbs.69 */70#define EF4_RXQ_MIN_ENT 128U71#define EF4_TXQ_MIN_ENT(efx) (2 * ef4_tx_max_skb_descs(efx))72 73static inline bool ef4_rss_enabled(struct ef4_nic *efx)74{75 return efx->rss_spread > 1;76}77 78/* Filters */79 80void ef4_mac_reconfigure(struct ef4_nic *efx);81 82/**83 * ef4_filter_insert_filter - add or replace a filter84 * @efx: NIC in which to insert the filter85 * @spec: Specification for the filter86 * @replace_equal: Flag for whether the specified filter may replace an87 * existing filter with equal priority88 *89 * On success, return the filter ID.90 * On failure, return a negative error code.91 *92 * If existing filters have equal match values to the new filter spec,93 * then the new filter might replace them or the function might fail,94 * as follows.95 *96 * 1. If the existing filters have lower priority, or @replace_equal97 * is set and they have equal priority, replace them.98 *99 * 2. If the existing filters have higher priority, return -%EPERM.100 *101 * 3. If !ef4_filter_is_mc_recipient(@spec), or the NIC does not102 * support delivery to multiple recipients, return -%EEXIST.103 *104 * This implies that filters for multiple multicast recipients must105 * all be inserted with the same priority and @replace_equal = %false.106 */107static inline s32 ef4_filter_insert_filter(struct ef4_nic *efx,108 struct ef4_filter_spec *spec,109 bool replace_equal)110{111 return efx->type->filter_insert(efx, spec, replace_equal);112}113 114/**115 * ef4_filter_remove_id_safe - remove a filter by ID, carefully116 * @efx: NIC from which to remove the filter117 * @priority: Priority of filter, as passed to @ef4_filter_insert_filter118 * @filter_id: ID of filter, as returned by @ef4_filter_insert_filter119 *120 * This function will range-check @filter_id, so it is safe to call121 * with a value passed from userland.122 */123static inline int ef4_filter_remove_id_safe(struct ef4_nic *efx,124 enum ef4_filter_priority priority,125 u32 filter_id)126{127 return efx->type->filter_remove_safe(efx, priority, filter_id);128}129 130/**131 * ef4_filter_get_filter_safe - retrieve a filter by ID, carefully132 * @efx: NIC from which to remove the filter133 * @priority: Priority of filter, as passed to @ef4_filter_insert_filter134 * @filter_id: ID of filter, as returned by @ef4_filter_insert_filter135 * @spec: Buffer in which to store filter specification136 *137 * This function will range-check @filter_id, so it is safe to call138 * with a value passed from userland.139 */140static inline int141ef4_filter_get_filter_safe(struct ef4_nic *efx,142 enum ef4_filter_priority priority,143 u32 filter_id, struct ef4_filter_spec *spec)144{145 return efx->type->filter_get_safe(efx, priority, filter_id, spec);146}147 148static inline u32 ef4_filter_count_rx_used(struct ef4_nic *efx,149 enum ef4_filter_priority priority)150{151 return efx->type->filter_count_rx_used(efx, priority);152}153static inline u32 ef4_filter_get_rx_id_limit(struct ef4_nic *efx)154{155 return efx->type->filter_get_rx_id_limit(efx);156}157static inline s32 ef4_filter_get_rx_ids(struct ef4_nic *efx,158 enum ef4_filter_priority priority,159 u32 *buf, u32 size)160{161 return efx->type->filter_get_rx_ids(efx, priority, buf, size);162}163#ifdef CONFIG_RFS_ACCEL164int ef4_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb,165 u16 rxq_index, u32 flow_id);166bool __ef4_filter_rfs_expire(struct ef4_nic *efx, unsigned quota);167static inline void ef4_filter_rfs_expire(struct ef4_channel *channel)168{169 if (channel->rfs_filters_added >= 60 &&170 __ef4_filter_rfs_expire(channel->efx, 100))171 channel->rfs_filters_added -= 60;172}173#define ef4_filter_rfs_enabled() 1174#else175static inline void ef4_filter_rfs_expire(struct ef4_channel *channel) {}176#define ef4_filter_rfs_enabled() 0177#endif178bool ef4_filter_is_mc_recipient(const struct ef4_filter_spec *spec);179 180/* Channels */181int ef4_channel_dummy_op_int(struct ef4_channel *channel);182void ef4_channel_dummy_op_void(struct ef4_channel *channel);183int ef4_realloc_channels(struct ef4_nic *efx, u32 rxq_entries, u32 txq_entries);184 185/* Ports */186int ef4_reconfigure_port(struct ef4_nic *efx);187int __ef4_reconfigure_port(struct ef4_nic *efx);188 189/* Ethtool support */190extern const struct ethtool_ops ef4_ethtool_ops;191 192/* Reset handling */193int ef4_reset(struct ef4_nic *efx, enum reset_type method);194void ef4_reset_down(struct ef4_nic *efx, enum reset_type method);195int ef4_reset_up(struct ef4_nic *efx, enum reset_type method, bool ok);196int ef4_try_recovery(struct ef4_nic *efx);197 198/* Global */199void ef4_schedule_reset(struct ef4_nic *efx, enum reset_type type);200unsigned int ef4_usecs_to_ticks(struct ef4_nic *efx, unsigned int usecs);201unsigned int ef4_ticks_to_usecs(struct ef4_nic *efx, unsigned int ticks);202int ef4_init_irq_moderation(struct ef4_nic *efx, unsigned int tx_usecs,203 unsigned int rx_usecs, bool rx_adaptive,204 bool rx_may_override_tx);205void ef4_get_irq_moderation(struct ef4_nic *efx, unsigned int *tx_usecs,206 unsigned int *rx_usecs, bool *rx_adaptive);207void ef4_stop_eventq(struct ef4_channel *channel);208void ef4_start_eventq(struct ef4_channel *channel);209 210/* Dummy PHY ops for PHY drivers */211int ef4_port_dummy_op_int(struct ef4_nic *efx);212void ef4_port_dummy_op_void(struct ef4_nic *efx);213 214/* Update the generic software stats in the passed stats array */215void ef4_update_sw_stats(struct ef4_nic *efx, u64 *stats);216 217/* MTD */218#ifdef CONFIG_SFC_FALCON_MTD219int ef4_mtd_add(struct ef4_nic *efx, struct ef4_mtd_partition *parts,220 size_t n_parts, size_t sizeof_part);221static inline int ef4_mtd_probe(struct ef4_nic *efx)222{223 return efx->type->mtd_probe(efx);224}225void ef4_mtd_rename(struct ef4_nic *efx);226void ef4_mtd_remove(struct ef4_nic *efx);227#else228static inline int ef4_mtd_probe(struct ef4_nic *efx) { return 0; }229static inline void ef4_mtd_rename(struct ef4_nic *efx) {}230static inline void ef4_mtd_remove(struct ef4_nic *efx) {}231#endif232 233static inline void ef4_schedule_channel(struct ef4_channel *channel)234{235 netif_vdbg(channel->efx, intr, channel->efx->net_dev,236 "channel %d scheduling NAPI poll on CPU%d\n",237 channel->channel, raw_smp_processor_id());238 239 napi_schedule(&channel->napi_str);240}241 242static inline void ef4_schedule_channel_irq(struct ef4_channel *channel)243{244 channel->event_test_cpu = raw_smp_processor_id();245 ef4_schedule_channel(channel);246}247 248void ef4_link_status_changed(struct ef4_nic *efx);249void ef4_link_set_advertising(struct ef4_nic *efx, u32);250void ef4_link_set_wanted_fc(struct ef4_nic *efx, u8);251 252static inline void ef4_device_detach_sync(struct ef4_nic *efx)253{254 struct net_device *dev = efx->net_dev;255 256 /* Lock/freeze all TX queues so that we can be sure the257 * TX scheduler is stopped when we're done and before258 * netif_device_present() becomes false.259 */260 netif_tx_lock_bh(dev);261 netif_device_detach(dev);262 netif_tx_unlock_bh(dev);263}264 265static inline bool ef4_rwsem_assert_write_locked(struct rw_semaphore *sem)266{267 if (WARN_ON(down_read_trylock(sem))) {268 up_read(sem);269 return false;270 }271 return true;272}273 274#endif /* EF4_EFX_H */275