diff options
Diffstat (limited to 'drivers/net/ethernet/sfc/efx.h')
| -rw-r--r-- | drivers/net/ethernet/sfc/efx.h | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/drivers/net/ethernet/sfc/efx.h b/drivers/net/ethernet/sfc/efx.h new file mode 100644 index 0000000000..48d3623735 --- /dev/null +++ b/drivers/net/ethernet/sfc/efx.h @@ -0,0 +1,241 @@ +/* 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 <linux/indirect_call_wrapper.h> +#include "net_driver.h" +#include "ef100_rx.h" +#include "ef100_tx.h" +#include "efx_common.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); +static inline netdev_tx_t efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb) +{ + return INDIRECT_CALL_2(tx_queue->efx->type->tx_enqueue, + ef100_enqueue_skb, __efx_enqueue_skb, + tx_queue, skb); +} +void efx_xmit_done_single(struct efx_tx_queue *tx_queue); +extern unsigned int efx_piobuf_size; + +/* 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) + INDIRECT_CALL_2(channel->efx->type->rx_packet, + __ef100_rx_packet, __efx_rx_packet, + channel); +} +static inline bool efx_rx_buf_hash_valid(struct efx_nic *efx, const u8 *prefix) +{ + if (efx->type->rx_buf_hash_valid) + return INDIRECT_CALL_1(efx->type->rx_buf_hash_valid, + ef100_rx_buf_hash_valid, + prefix); + return true; +} + +/* 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; +} + +/* 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); +} + +/* 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); + +/* 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_device_detach_sync(struct efx_nic *efx) +{ + struct net_device *dev = efx->net_dev; + + /* We must stop reps (which use our TX) before we stop ourselves. */ + efx_detach_reps(efx); + + /* 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 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); + if (efx->state == STATE_NET_UP) + efx_attach_reps(efx); + } +} + +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; +} + +int efx_xdp_tx_buffers(struct efx_nic *efx, int n, struct xdp_frame **xdpfs, + bool flush); + +#endif /* EFX_EFX_H */ |