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Release 4.11 drivers/net/ethernet/sfc/efx.h

/****************************************************************************
 * Driver for Solarflare network controllers and boards
 * Copyright 2005-2006 Fen Systems Ltd.
 * Copyright 2006-2013 Solarflare Communications Inc.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation, incorporated herein by reference.
 */

#ifndef EFX_EFX_H

#define EFX_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 EFX_MEM_BAR 2

#define EFX_MEM_VF_BAR 0

int efx_net_open(struct net_device *net_dev);
int efx_net_stop(struct net_device *net_dev);

/* TX */
int efx_probe_tx_queue(struct efx_tx_queue *tx_queue);
void efx_remove_tx_queue(struct efx_tx_queue *tx_queue);
void efx_init_tx_queue(struct efx_tx_queue *tx_queue);
void efx_init_tx_queue_core_txq(struct efx_tx_queue *tx_queue);
void efx_fini_tx_queue(struct efx_tx_queue *tx_queue);
netdev_tx_t efx_hard_start_xmit(struct sk_buff *skb,
				struct net_device *net_dev);
netdev_tx_t efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb);
void efx_xmit_done(struct efx_tx_queue *tx_queue, unsigned int index);
int efx_setup_tc(struct net_device *net_dev, u32 handle, __be16 proto,
		 struct tc_to_netdev *tc);
unsigned int efx_tx_max_skb_descs(struct efx_nic *efx);
extern unsigned int efx_piobuf_size;
extern bool efx_separate_tx_channels;

/* RX */
void efx_set_default_rx_indir_table(struct efx_nic *efx);
void efx_rx_config_page_split(struct efx_nic *efx);
int efx_probe_rx_queue(struct efx_rx_queue *rx_queue);
void efx_remove_rx_queue(struct efx_rx_queue *rx_queue);
void efx_init_rx_queue(struct efx_rx_queue *rx_queue);
void efx_fini_rx_queue(struct efx_rx_queue *rx_queue);
void efx_fast_push_rx_descriptors(struct efx_rx_queue *rx_queue, bool atomic);
void efx_rx_slow_fill(unsigned long context);
void __efx_rx_packet(struct efx_channel *channel);
void efx_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index,
		   unsigned int n_frags, unsigned int len, u16 flags);

static inline void efx_rx_flush_packet(struct efx_channel *channel) { if (channel->rx_pkt_n_frags) __efx_rx_packet(channel); }

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void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue); #define EFX_MAX_DMAQ_SIZE 4096UL #define EFX_DEFAULT_DMAQ_SIZE 1024UL #define EFX_MIN_DMAQ_SIZE 512UL #define EFX_MAX_EVQ_SIZE 16384UL #define EFX_MIN_EVQ_SIZE 512UL /* Maximum number of TCP segments we support for soft-TSO */ #define EFX_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 EFX_RXQ_MIN_ENT 128U #define EFX_TXQ_MIN_ENT(efx) (2 * efx_tx_max_skb_descs(efx)) /* All EF10 architecture NICs steal one bit of the DMAQ size for various * other purposes when counting TxQ entries, so we halve the queue size. */ #define EFX_TXQ_MAX_ENT(efx) (EFX_WORKAROUND_EF10(efx) ? \ EFX_MAX_DMAQ_SIZE / 2 : EFX_MAX_DMAQ_SIZE)
static inline bool efx_rss_enabled(struct efx_nic *efx) { return efx->rss_spread > 1; }

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/* Filters */ void efx_mac_reconfigure(struct efx_nic *efx); /** * efx_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 !efx_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 efx_filter_insert_filter(struct efx_nic *efx, struct efx_filter_spec *spec, bool replace_equal) { return efx->type->filter_insert(efx, spec, replace_equal); }

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/** * efx_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 @efx_filter_insert_filter * @filter_id: ID of filter, as returned by @efx_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 efx_filter_remove_id_safe(struct efx_nic *efx, enum efx_filter_priority priority, u32 filter_id) { return efx->type->filter_remove_safe(efx, priority, filter_id); }

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/** * efx_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 @efx_filter_insert_filter * @filter_id: ID of filter, as returned by @efx_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 efx_filter_get_filter_safe(struct efx_nic *efx, enum efx_filter_priority priority, u32 filter_id, struct efx_filter_spec *spec) { return efx->type->filter_get_safe(efx, priority, filter_id, spec); }

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static inline u32 efx_filter_count_rx_used(struct efx_nic *efx, enum efx_filter_priority priority) { return efx->type->filter_count_rx_used(efx, priority); }

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static inline u32 efx_filter_get_rx_id_limit(struct efx_nic *efx) { return efx->type->filter_get_rx_id_limit(efx); }

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static inline s32 efx_filter_get_rx_ids(struct efx_nic *efx, enum efx_filter_priority priority, u32 *buf, u32 size) { return efx->type->filter_get_rx_ids(efx, priority, buf, size); }

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#ifdef CONFIG_RFS_ACCEL int efx_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb, u16 rxq_index, u32 flow_id); bool __efx_filter_rfs_expire(struct efx_nic *efx, unsigned quota);
static inline void efx_filter_rfs_expire(struct efx_channel *channel) { if (channel->rfs_filters_added >= 60 && __efx_filter_rfs_expire(channel->efx, 100)) channel->rfs_filters_added -= 60; }

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#define efx_filter_rfs_enabled() 1 #else
static inline void efx_filter_rfs_expire(struct efx_channel *channel) {}

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#define efx_filter_rfs_enabled() 0 #endif bool efx_filter_is_mc_recipient(const struct efx_filter_spec *spec); /* Channels */ int efx_channel_dummy_op_int(struct efx_channel *channel); void efx_channel_dummy_op_void(struct efx_channel *channel); int efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries); /* Ports */ int efx_reconfigure_port(struct efx_nic *efx); int __efx_reconfigure_port(struct efx_nic *efx); /* Ethtool support */ extern const struct ethtool_ops efx_ethtool_ops; /* Reset handling */ int efx_reset(struct efx_nic *efx, enum reset_type method); void efx_reset_down(struct efx_nic *efx, enum reset_type method); int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok); int efx_try_recovery(struct efx_nic *efx); /* Global */ void efx_schedule_reset(struct efx_nic *efx, enum reset_type type); unsigned int efx_usecs_to_ticks(struct efx_nic *efx, unsigned int usecs); unsigned int efx_ticks_to_usecs(struct efx_nic *efx, unsigned int ticks); int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs, unsigned int rx_usecs, bool rx_adaptive, bool rx_may_override_tx); void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs, unsigned int *rx_usecs, bool *rx_adaptive); void efx_stop_eventq(struct efx_channel *channel); void efx_start_eventq(struct efx_channel *channel); /* Dummy PHY ops for PHY drivers */ int efx_port_dummy_op_int(struct efx_nic *efx); void efx_port_dummy_op_void(struct efx_nic *efx); /* Update the generic software stats in the passed stats array */ void efx_update_sw_stats(struct efx_nic *efx, u64 *stats); /* MTD */ #ifdef CONFIG_SFC_MTD int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts, size_t n_parts, size_t sizeof_part);
static inline int efx_mtd_probe(struct efx_nic *efx) { return efx->type->mtd_probe(efx); }

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void efx_mtd_rename(struct efx_nic *efx); void efx_mtd_remove(struct efx_nic *efx); #else
static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; }

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static inline void efx_mtd_rename(struct efx_nic *efx) {}

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static inline void efx_mtd_remove(struct efx_nic *efx) {}

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#endif #ifdef CONFIG_SFC_SRIOV
static inline unsigned int efx_vf_size(struct efx_nic *efx) { return 1 << efx->vi_scale; }

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#endif
static inline void efx_schedule_channel(struct efx_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); }

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static inline void efx_schedule_channel_irq(struct efx_channel *channel) { channel->event_test_cpu = raw_smp_processor_id(); efx_schedule_channel(channel); }

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void efx_link_status_changed(struct efx_nic *efx); void efx_link_set_advertising(struct efx_nic *efx, u32); void efx_link_set_wanted_fc(struct efx_nic *efx, u8);
static inline void efx_device_detach_sync(struct efx_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); }

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static inline void efx_device_attach_if_not_resetting(struct efx_nic *efx) { if ((efx->state != STATE_DISABLED) && !efx->reset_pending) netif_device_attach(efx->net_dev); }

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static inline bool efx_rwsem_assert_write_locked(struct rw_semaphore *sem) { if (WARN_ON(down_read_trylock(sem))) { up_read(sem); return false; } return true; }

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#endif /* EFX_EFX_H */

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