| /**************************************************************************** |
| * 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); |
| } |
| 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)) |
| |
| #define EFX_TXQ_MAX_ENT(efx) (EFX_WORKAROUND_35388(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; |
| } |
| |
| /* 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); |
| } |
| |
| /** |
| * 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); |
| } |
| #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; |
| } |
| #define efx_filter_rfs_enabled() 1 |
| #else |
| static inline void efx_filter_rfs_expire(struct efx_channel *channel) {} |
| #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); |
| 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); |
| } |
| 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; } |
| static inline void efx_mtd_rename(struct efx_nic *efx) {} |
| static inline void efx_mtd_remove(struct efx_nic *efx) {} |
| #endif |
| |
| #ifdef CONFIG_SFC_SRIOV |
| static inline unsigned int efx_vf_size(struct efx_nic *efx) |
| { |
| return 1 << efx->vi_scale; |
| } |
| #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); |
| } |
| |
| static inline void efx_schedule_channel_irq(struct efx_channel *channel) |
| { |
| channel->event_test_cpu = raw_smp_processor_id(); |
| efx_schedule_channel(channel); |
| } |
| |
| 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); |
| } |
| |
| 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; |
| } |
| |
| #endif /* EFX_EFX_H */ |