diff options
Diffstat (limited to 'drivers/net/ethernet/sfc/falcon/efx.h')
| -rw-r--r-- | drivers/net/ethernet/sfc/falcon/efx.h | 274 |
1 files changed, 274 insertions, 0 deletions
diff --git a/drivers/net/ethernet/sfc/falcon/efx.h b/drivers/net/ethernet/sfc/falcon/efx.h new file mode 100644 index 0000000000..d3b4646545 --- /dev/null +++ b/drivers/net/ethernet/sfc/falcon/efx.h @@ -0,0 +1,274 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/**************************************************************************** + * Driver for Solarflare network controllers and boards + * Copyright 2005-2006 Fen Systems Ltd. + * Copyright 2006-2013 Solarflare Communications Inc. + */ + +#ifndef EF4_EFX_H +#define EF4_EFX_H + +#include "net_driver.h" +#include "filter.h" + +/* All controllers use BAR 0 for I/O space and BAR 2(&3) for memory */ +/* All VFs use BAR 0/1 for memory */ +#define EF4_MEM_BAR 2 +#define EF4_MEM_VF_BAR 0 + +int ef4_net_open(struct net_device *net_dev); +int ef4_net_stop(struct net_device *net_dev); + +/* TX */ +int ef4_probe_tx_queue(struct ef4_tx_queue *tx_queue); +void ef4_remove_tx_queue(struct ef4_tx_queue *tx_queue); +void ef4_init_tx_queue(struct ef4_tx_queue *tx_queue); +void ef4_init_tx_queue_core_txq(struct ef4_tx_queue *tx_queue); +void ef4_fini_tx_queue(struct ef4_tx_queue *tx_queue); +netdev_tx_t ef4_hard_start_xmit(struct sk_buff *skb, + struct net_device *net_dev); +netdev_tx_t ef4_enqueue_skb(struct ef4_tx_queue *tx_queue, struct sk_buff *skb); +void ef4_xmit_done(struct ef4_tx_queue *tx_queue, unsigned int index); +int ef4_setup_tc(struct net_device *net_dev, enum tc_setup_type type, + void *type_data); +unsigned int ef4_tx_max_skb_descs(struct ef4_nic *efx); +extern bool ef4_separate_tx_channels; + +/* RX */ +void ef4_set_default_rx_indir_table(struct ef4_nic *efx); +void ef4_rx_config_page_split(struct ef4_nic *efx); +int ef4_probe_rx_queue(struct ef4_rx_queue *rx_queue); +void ef4_remove_rx_queue(struct ef4_rx_queue *rx_queue); +void ef4_init_rx_queue(struct ef4_rx_queue *rx_queue); +void ef4_fini_rx_queue(struct ef4_rx_queue *rx_queue); +void ef4_fast_push_rx_descriptors(struct ef4_rx_queue *rx_queue, bool atomic); +void ef4_rx_slow_fill(struct timer_list *t); +void __ef4_rx_packet(struct ef4_channel *channel); +void ef4_rx_packet(struct ef4_rx_queue *rx_queue, unsigned int index, + unsigned int n_frags, unsigned int len, u16 flags); +static inline void ef4_rx_flush_packet(struct ef4_channel *channel) +{ + if (channel->rx_pkt_n_frags) + __ef4_rx_packet(channel); +} +void ef4_schedule_slow_fill(struct ef4_rx_queue *rx_queue); + +#define EF4_MAX_DMAQ_SIZE 4096UL +#define EF4_DEFAULT_DMAQ_SIZE 1024UL +#define EF4_MIN_DMAQ_SIZE 512UL + +#define EF4_MAX_EVQ_SIZE 16384UL +#define EF4_MIN_EVQ_SIZE 512UL + +/* Maximum number of TCP segments we support for soft-TSO */ +#define EF4_TSO_MAX_SEGS 100 + +/* The smallest [rt]xq_entries that the driver supports. RX minimum + * is a bit arbitrary. For TX, we must have space for at least 2 + * TSO skbs. + */ +#define EF4_RXQ_MIN_ENT 128U +#define EF4_TXQ_MIN_ENT(efx) (2 * ef4_tx_max_skb_descs(efx)) + +static inline bool ef4_rss_enabled(struct ef4_nic *efx) +{ + return efx->rss_spread > 1; +} + +/* Filters */ + +void ef4_mac_reconfigure(struct ef4_nic *efx); + +/** + * ef4_filter_insert_filter - add or replace a filter + * @efx: NIC in which to insert the filter + * @spec: Specification for the filter + * @replace_equal: Flag for whether the specified filter may replace an + * existing filter with equal priority + * + * On success, return the filter ID. + * On failure, return a negative error code. + * + * If existing filters have equal match values to the new filter spec, + * then the new filter might replace them or the function might fail, + * as follows. + * + * 1. If the existing filters have lower priority, or @replace_equal + * is set and they have equal priority, replace them. + * + * 2. If the existing filters have higher priority, return -%EPERM. + * + * 3. If !ef4_filter_is_mc_recipient(@spec), or the NIC does not + * support delivery to multiple recipients, return -%EEXIST. + * + * This implies that filters for multiple multicast recipients must + * all be inserted with the same priority and @replace_equal = %false. + */ +static inline s32 ef4_filter_insert_filter(struct ef4_nic *efx, + struct ef4_filter_spec *spec, + bool replace_equal) +{ + return efx->type->filter_insert(efx, spec, replace_equal); +} + +/** + * ef4_filter_remove_id_safe - remove a filter by ID, carefully + * @efx: NIC from which to remove the filter + * @priority: Priority of filter, as passed to @ef4_filter_insert_filter + * @filter_id: ID of filter, as returned by @ef4_filter_insert_filter + * + * This function will range-check @filter_id, so it is safe to call + * with a value passed from userland. + */ +static inline int ef4_filter_remove_id_safe(struct ef4_nic *efx, + enum ef4_filter_priority priority, + u32 filter_id) +{ + return efx->type->filter_remove_safe(efx, priority, filter_id); +} + +/** + * ef4_filter_get_filter_safe - retrieve a filter by ID, carefully + * @efx: NIC from which to remove the filter + * @priority: Priority of filter, as passed to @ef4_filter_insert_filter + * @filter_id: ID of filter, as returned by @ef4_filter_insert_filter + * @spec: Buffer in which to store filter specification + * + * This function will range-check @filter_id, so it is safe to call + * with a value passed from userland. + */ +static inline int +ef4_filter_get_filter_safe(struct ef4_nic *efx, + enum ef4_filter_priority priority, + u32 filter_id, struct ef4_filter_spec *spec) +{ + return efx->type->filter_get_safe(efx, priority, filter_id, spec); +} + +static inline u32 ef4_filter_count_rx_used(struct ef4_nic *efx, + enum ef4_filter_priority priority) +{ + return efx->type->filter_count_rx_used(efx, priority); +} +static inline u32 ef4_filter_get_rx_id_limit(struct ef4_nic *efx) +{ + return efx->type->filter_get_rx_id_limit(efx); +} +static inline s32 ef4_filter_get_rx_ids(struct ef4_nic *efx, + enum ef4_filter_priority priority, + u32 *buf, u32 size) +{ + return efx->type->filter_get_rx_ids(efx, priority, buf, size); +} +#ifdef CONFIG_RFS_ACCEL +int ef4_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb, + u16 rxq_index, u32 flow_id); +bool __ef4_filter_rfs_expire(struct ef4_nic *efx, unsigned quota); +static inline void ef4_filter_rfs_expire(struct ef4_channel *channel) +{ + if (channel->rfs_filters_added >= 60 && + __ef4_filter_rfs_expire(channel->efx, 100)) + channel->rfs_filters_added -= 60; +} +#define ef4_filter_rfs_enabled() 1 +#else +static inline void ef4_filter_rfs_expire(struct ef4_channel *channel) {} +#define ef4_filter_rfs_enabled() 0 +#endif +bool ef4_filter_is_mc_recipient(const struct ef4_filter_spec *spec); + +/* Channels */ +int ef4_channel_dummy_op_int(struct ef4_channel *channel); +void ef4_channel_dummy_op_void(struct ef4_channel *channel); +int ef4_realloc_channels(struct ef4_nic *efx, u32 rxq_entries, u32 txq_entries); + +/* Ports */ +int ef4_reconfigure_port(struct ef4_nic *efx); +int __ef4_reconfigure_port(struct ef4_nic *efx); + +/* Ethtool support */ +extern const struct ethtool_ops ef4_ethtool_ops; + +/* Reset handling */ +int ef4_reset(struct ef4_nic *efx, enum reset_type method); +void ef4_reset_down(struct ef4_nic *efx, enum reset_type method); +int ef4_reset_up(struct ef4_nic *efx, enum reset_type method, bool ok); +int ef4_try_recovery(struct ef4_nic *efx); + +/* Global */ +void ef4_schedule_reset(struct ef4_nic *efx, enum reset_type type); +unsigned int ef4_usecs_to_ticks(struct ef4_nic *efx, unsigned int usecs); +unsigned int ef4_ticks_to_usecs(struct ef4_nic *efx, unsigned int ticks); +int ef4_init_irq_moderation(struct ef4_nic *efx, unsigned int tx_usecs, + unsigned int rx_usecs, bool rx_adaptive, + bool rx_may_override_tx); +void ef4_get_irq_moderation(struct ef4_nic *efx, unsigned int *tx_usecs, + unsigned int *rx_usecs, bool *rx_adaptive); +void ef4_stop_eventq(struct ef4_channel *channel); +void ef4_start_eventq(struct ef4_channel *channel); + +/* Dummy PHY ops for PHY drivers */ +int ef4_port_dummy_op_int(struct ef4_nic *efx); +void ef4_port_dummy_op_void(struct ef4_nic *efx); + +/* Update the generic software stats in the passed stats array */ +void ef4_update_sw_stats(struct ef4_nic *efx, u64 *stats); + +/* MTD */ +#ifdef CONFIG_SFC_FALCON_MTD +int ef4_mtd_add(struct ef4_nic *efx, struct ef4_mtd_partition *parts, + size_t n_parts, size_t sizeof_part); +static inline int ef4_mtd_probe(struct ef4_nic *efx) +{ + return efx->type->mtd_probe(efx); +} +void ef4_mtd_rename(struct ef4_nic *efx); +void ef4_mtd_remove(struct ef4_nic *efx); +#else +static inline int ef4_mtd_probe(struct ef4_nic *efx) { return 0; } +static inline void ef4_mtd_rename(struct ef4_nic *efx) {} +static inline void ef4_mtd_remove(struct ef4_nic *efx) {} +#endif + +static inline void ef4_schedule_channel(struct ef4_channel *channel) +{ + netif_vdbg(channel->efx, intr, channel->efx->net_dev, + "channel %d scheduling NAPI poll on CPU%d\n", + channel->channel, raw_smp_processor_id()); + + napi_schedule(&channel->napi_str); +} + +static inline void ef4_schedule_channel_irq(struct ef4_channel *channel) +{ + channel->event_test_cpu = raw_smp_processor_id(); + ef4_schedule_channel(channel); +} + +void ef4_link_status_changed(struct ef4_nic *efx); +void ef4_link_set_advertising(struct ef4_nic *efx, u32); +void ef4_link_set_wanted_fc(struct ef4_nic *efx, u8); + +static inline void ef4_device_detach_sync(struct ef4_nic *efx) +{ + struct net_device *dev = efx->net_dev; + + /* Lock/freeze all TX queues so that we can be sure the + * TX scheduler is stopped when we're done and before + * netif_device_present() becomes false. + */ + netif_tx_lock_bh(dev); + netif_device_detach(dev); + netif_tx_unlock_bh(dev); +} + +static inline bool ef4_rwsem_assert_write_locked(struct rw_semaphore *sem) +{ + if (WARN_ON(down_read_trylock(sem))) { + up_read(sem); + return false; + } + return true; +} + +#endif /* EF4_EFX_H */ |