mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-27 12:37:59 +07:00
36763266bb
This patch adds the sfc driver code for implementing busy polling. It adds ndo_busy_poll method and locking between it and napi poll. It also adds each napi to the napi_hash right after netif_napi_add(). Uses efx_start_eventq and efx_stop_eventq in the self tests. Signed-off-by: Shradha Shah <sshah@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
256 lines
8.9 KiB
C
256 lines
8.9 KiB
C
/****************************************************************************
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* Driver for Solarflare network controllers and boards
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* Copyright 2005-2006 Fen Systems Ltd.
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* Copyright 2006-2013 Solarflare Communications Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation, incorporated herein by reference.
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*/
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#ifndef EFX_EFX_H
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#define EFX_EFX_H
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#include "net_driver.h"
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#include "filter.h"
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/* All controllers use BAR 0 for I/O space and BAR 2(&3) for memory */
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#define EFX_MEM_BAR 2
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/* TX */
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int efx_probe_tx_queue(struct efx_tx_queue *tx_queue);
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void efx_remove_tx_queue(struct efx_tx_queue *tx_queue);
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void efx_init_tx_queue(struct efx_tx_queue *tx_queue);
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void efx_init_tx_queue_core_txq(struct efx_tx_queue *tx_queue);
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void efx_fini_tx_queue(struct efx_tx_queue *tx_queue);
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netdev_tx_t efx_hard_start_xmit(struct sk_buff *skb,
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struct net_device *net_dev);
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netdev_tx_t efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb);
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void efx_xmit_done(struct efx_tx_queue *tx_queue, unsigned int index);
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int efx_setup_tc(struct net_device *net_dev, u8 num_tc);
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unsigned int efx_tx_max_skb_descs(struct efx_nic *efx);
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extern unsigned int efx_piobuf_size;
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/* RX */
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void efx_rx_config_page_split(struct efx_nic *efx);
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int efx_probe_rx_queue(struct efx_rx_queue *rx_queue);
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void efx_remove_rx_queue(struct efx_rx_queue *rx_queue);
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void efx_init_rx_queue(struct efx_rx_queue *rx_queue);
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void efx_fini_rx_queue(struct efx_rx_queue *rx_queue);
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void efx_fast_push_rx_descriptors(struct efx_rx_queue *rx_queue, bool atomic);
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void efx_rx_slow_fill(unsigned long context);
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void __efx_rx_packet(struct efx_channel *channel);
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void efx_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index,
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unsigned int n_frags, unsigned int len, u16 flags);
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static inline void efx_rx_flush_packet(struct efx_channel *channel)
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{
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if (channel->rx_pkt_n_frags)
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__efx_rx_packet(channel);
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}
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void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
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#define EFX_MAX_DMAQ_SIZE 4096UL
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#define EFX_DEFAULT_DMAQ_SIZE 1024UL
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#define EFX_MIN_DMAQ_SIZE 512UL
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#define EFX_MAX_EVQ_SIZE 16384UL
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#define EFX_MIN_EVQ_SIZE 512UL
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/* Maximum number of TCP segments we support for soft-TSO */
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#define EFX_TSO_MAX_SEGS 100
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/* The smallest [rt]xq_entries that the driver supports. RX minimum
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* is a bit arbitrary. For TX, we must have space for at least 2
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* TSO skbs.
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*/
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#define EFX_RXQ_MIN_ENT 128U
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#define EFX_TXQ_MIN_ENT(efx) (2 * efx_tx_max_skb_descs(efx))
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#define EFX_TXQ_MAX_ENT(efx) (EFX_WORKAROUND_35388(efx) ? \
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EFX_MAX_DMAQ_SIZE / 2 : EFX_MAX_DMAQ_SIZE)
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/* Filters */
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/**
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* efx_filter_insert_filter - add or replace a filter
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* @efx: NIC in which to insert the filter
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* @spec: Specification for the filter
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* @replace_equal: Flag for whether the specified filter may replace an
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* existing filter with equal priority
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*
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* On success, return the filter ID.
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* On failure, return a negative error code.
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*
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* If existing filters have equal match values to the new filter spec,
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* then the new filter might replace them or the function might fail,
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* as follows.
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*
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* 1. If the existing filters have lower priority, or @replace_equal
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* is set and they have equal priority, replace them.
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*
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* 2. If the existing filters have higher priority, return -%EPERM.
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*
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* 3. If !efx_filter_is_mc_recipient(@spec), or the NIC does not
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* support delivery to multiple recipients, return -%EEXIST.
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*
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* This implies that filters for multiple multicast recipients must
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* all be inserted with the same priority and @replace_equal = %false.
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*/
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static inline s32 efx_filter_insert_filter(struct efx_nic *efx,
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struct efx_filter_spec *spec,
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bool replace_equal)
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{
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return efx->type->filter_insert(efx, spec, replace_equal);
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}
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/**
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* efx_filter_remove_id_safe - remove a filter by ID, carefully
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* @efx: NIC from which to remove the filter
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* @priority: Priority of filter, as passed to @efx_filter_insert_filter
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* @filter_id: ID of filter, as returned by @efx_filter_insert_filter
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*
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* This function will range-check @filter_id, so it is safe to call
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* with a value passed from userland.
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*/
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static inline int efx_filter_remove_id_safe(struct efx_nic *efx,
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enum efx_filter_priority priority,
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u32 filter_id)
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{
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return efx->type->filter_remove_safe(efx, priority, filter_id);
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}
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/**
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* efx_filter_get_filter_safe - retrieve a filter by ID, carefully
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* @efx: NIC from which to remove the filter
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* @priority: Priority of filter, as passed to @efx_filter_insert_filter
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* @filter_id: ID of filter, as returned by @efx_filter_insert_filter
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* @spec: Buffer in which to store filter specification
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*
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* This function will range-check @filter_id, so it is safe to call
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* with a value passed from userland.
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*/
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static inline int
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efx_filter_get_filter_safe(struct efx_nic *efx,
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enum efx_filter_priority priority,
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u32 filter_id, struct efx_filter_spec *spec)
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{
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return efx->type->filter_get_safe(efx, priority, filter_id, spec);
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}
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static inline u32 efx_filter_count_rx_used(struct efx_nic *efx,
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enum efx_filter_priority priority)
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{
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return efx->type->filter_count_rx_used(efx, priority);
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}
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static inline u32 efx_filter_get_rx_id_limit(struct efx_nic *efx)
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{
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return efx->type->filter_get_rx_id_limit(efx);
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}
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static inline s32 efx_filter_get_rx_ids(struct efx_nic *efx,
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enum efx_filter_priority priority,
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u32 *buf, u32 size)
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{
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return efx->type->filter_get_rx_ids(efx, priority, buf, size);
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}
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#ifdef CONFIG_RFS_ACCEL
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int efx_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb,
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u16 rxq_index, u32 flow_id);
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bool __efx_filter_rfs_expire(struct efx_nic *efx, unsigned quota);
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static inline void efx_filter_rfs_expire(struct efx_channel *channel)
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{
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if (channel->rfs_filters_added >= 60 &&
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__efx_filter_rfs_expire(channel->efx, 100))
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channel->rfs_filters_added -= 60;
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}
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#define efx_filter_rfs_enabled() 1
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#else
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static inline void efx_filter_rfs_expire(struct efx_channel *channel) {}
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#define efx_filter_rfs_enabled() 0
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#endif
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bool efx_filter_is_mc_recipient(const struct efx_filter_spec *spec);
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/* Channels */
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int efx_channel_dummy_op_int(struct efx_channel *channel);
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void efx_channel_dummy_op_void(struct efx_channel *channel);
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int efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries);
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/* Ports */
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int efx_reconfigure_port(struct efx_nic *efx);
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int __efx_reconfigure_port(struct efx_nic *efx);
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/* Ethtool support */
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extern const struct ethtool_ops efx_ethtool_ops;
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/* Reset handling */
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int efx_reset(struct efx_nic *efx, enum reset_type method);
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void efx_reset_down(struct efx_nic *efx, enum reset_type method);
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int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok);
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int efx_try_recovery(struct efx_nic *efx);
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/* Global */
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void efx_schedule_reset(struct efx_nic *efx, enum reset_type type);
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int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs,
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unsigned int rx_usecs, bool rx_adaptive,
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bool rx_may_override_tx);
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void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs,
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unsigned int *rx_usecs, bool *rx_adaptive);
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void efx_stop_eventq(struct efx_channel *channel);
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void efx_start_eventq(struct efx_channel *channel);
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/* Dummy PHY ops for PHY drivers */
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int efx_port_dummy_op_int(struct efx_nic *efx);
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void efx_port_dummy_op_void(struct efx_nic *efx);
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/* Update the generic software stats in the passed stats array */
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void efx_update_sw_stats(struct efx_nic *efx, u64 *stats);
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/* MTD */
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#ifdef CONFIG_SFC_MTD
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int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts,
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size_t n_parts, size_t sizeof_part);
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static inline int efx_mtd_probe(struct efx_nic *efx)
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{
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return efx->type->mtd_probe(efx);
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}
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void efx_mtd_rename(struct efx_nic *efx);
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void efx_mtd_remove(struct efx_nic *efx);
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#else
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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
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static inline void efx_schedule_channel(struct efx_channel *channel)
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{
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netif_vdbg(channel->efx, intr, channel->efx->net_dev,
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"channel %d scheduling NAPI poll on CPU%d\n",
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channel->channel, raw_smp_processor_id());
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napi_schedule(&channel->napi_str);
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}
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static inline void efx_schedule_channel_irq(struct efx_channel *channel)
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{
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channel->event_test_cpu = raw_smp_processor_id();
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efx_schedule_channel(channel);
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}
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void efx_link_status_changed(struct efx_nic *efx);
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void efx_link_set_advertising(struct efx_nic *efx, u32);
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void efx_link_set_wanted_fc(struct efx_nic *efx, u8);
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static inline void efx_device_detach_sync(struct efx_nic *efx)
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{
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struct net_device *dev = efx->net_dev;
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/* Lock/freeze all TX queues so that we can be sure the
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* TX scheduler is stopped when we're done and before
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* netif_device_present() becomes false.
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*/
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netif_tx_lock_bh(dev);
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netif_device_detach(dev);
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netif_tx_unlock_bh(dev);
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}
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#endif /* EFX_EFX_H */
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