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/* 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 EFX_EFX_H
#define EFX_EFX_H
#include "net_driver.h"
#include "filter.h"
int efx_net_open(struct net_device *net_dev);
int efx_net_stop(struct net_device *net_dev);
/* TX */
void efx_init_tx_queue_core_txq(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, enum tc_setup_type type,
void *type_data);
extern unsigned int efx_piobuf_size;
extern bool efx_separate_tx_channels;
/* RX */
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)
#define EFX_MAX_DMAQ_SIZE 4096UL
#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) ? \
static inline bool efx_rss_enabled(struct efx_nic *efx)
return efx->rss_spread > 1;
/* Filters */
* 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);
* 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);
* 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);
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);
static inline u32 efx_filter_get_rx_id_limit(struct efx_nic *efx)
return efx->type->filter_get_rx_id_limit(efx);
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);
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_channel *channel, unsigned int quota);
static inline void efx_filter_rfs_expire(struct work_struct *data)
struct delayed_work *dwork = to_delayed_work(data);
struct efx_channel *channel;
unsigned int time, quota;
channel = container_of(dwork, struct efx_channel, filter_work);
time = jiffies - channel->rfs_last_expiry;
quota = channel->rfs_filter_count * time / (30 * HZ);
if (quota > 20 && __efx_filter_rfs_expire(channel, min(channel->rfs_filter_count, quota)))
channel->rfs_last_expiry += time;
/* Ensure we do more work eventually even if NAPI poll is not happening */
schedule_delayed_work(dwork, 30 * HZ);
#define efx_filter_rfs_enabled() 1
static inline void efx_filter_rfs_expire(struct work_struct *data) {}
#define efx_filter_rfs_enabled() 0
/* RSS contexts */
static inline bool efx_rss_active(struct efx_rss_context *ctx)
return ctx->context_id != EFX_MCDI_RSS_CONTEXT_INVALID;
/* Ethtool support */
extern const struct ethtool_ops efx_ethtool_ops;
/* Global */
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);
/* 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 */
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);
void efx_mtd_rename(struct efx_nic *efx);
void efx_mtd_remove(struct efx_nic *efx);
static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; }
static inline void efx_mtd_rename(struct efx_nic *efx) {}
static inline void efx_mtd_remove(struct efx_nic *efx) {}
static inline unsigned int efx_vf_size(struct efx_nic *efx)
return 1 << efx->vi_scale;
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());
static inline void efx_schedule_channel_irq(struct efx_channel *channel)
channel->event_test_cpu = raw_smp_processor_id();
void efx_link_clear_advertising(struct efx_nic *efx);
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.
static inline void efx_device_attach_if_not_resetting(struct efx_nic *efx)
if ((efx->state != STATE_DISABLED) && !efx->reset_pending)
static inline bool efx_rwsem_assert_write_locked(struct rw_semaphore *sem)
if (WARN_ON(down_read_trylock(sem))) {
return false;
return true;
int efx_xdp_tx_buffers(struct efx_nic *efx, int n, struct xdp_frame **xdpfs,
bool flush);
#endif /* EFX_EFX_H */