efx.h

  1/* SPDX-License-Identifier: GPL-2.0-only */
  2/****************************************************************************
  3 * Driver for Solarflare network controllers and boards
  4 * Copyright 2005-2006 Fen Systems Ltd.
  5 * Copyright 2006-2013 Solarflare Communications Inc.
  6 */
  7
  8#ifndef EFX_EFX_H
  9#define EFX_EFX_H
 10
 11#include <linux/indirect_call_wrapper.h>
 12#include "net_driver.h"
 13#include "filter.h"
 14
 15/* TX */
 16void efx_siena_init_tx_queue_core_txq(struct efx_tx_queue *tx_queue);
 17netdev_tx_t efx_siena_hard_start_xmit(struct sk_buff *skb,
 18				      struct net_device *net_dev);
 19netdev_tx_t __efx_siena_enqueue_skb(struct efx_tx_queue *tx_queue,
 20				    struct sk_buff *skb);
 21static inline netdev_tx_t efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb)
 22{
 23	return INDIRECT_CALL_1(tx_queue->efx->type->tx_enqueue,
 24			       __efx_siena_enqueue_skb, tx_queue, skb);
 25}
 26int efx_siena_setup_tc(struct net_device *net_dev, enum tc_setup_type type,
 27		       void *type_data);
 28
 29/* RX */
 30void __efx_siena_rx_packet(struct efx_channel *channel);
 31void efx_siena_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index,
 32			 unsigned int n_frags, unsigned int len, u16 flags);
 33static inline void efx_rx_flush_packet(struct efx_channel *channel)
 34{
 35	if (channel->rx_pkt_n_frags)
 36		__efx_siena_rx_packet(channel);
 37}
 38
 39/* Maximum number of TCP segments we support for soft-TSO */
 40#define EFX_TSO_MAX_SEGS	100
 41
 42/* The smallest [rt]xq_entries that the driver supports.  RX minimum
 43 * is a bit arbitrary.  For TX, we must have space for at least 2
 44 * TSO skbs.
 45 */
 46#define EFX_RXQ_MIN_ENT		128U
 47#define EFX_TXQ_MIN_ENT(efx)	(2 * efx_siena_tx_max_skb_descs(efx))
 48
 49/* All EF10 architecture NICs steal one bit of the DMAQ size for various
 50 * other purposes when counting TxQ entries, so we halve the queue size.
 51 */
 52#define EFX_TXQ_MAX_ENT(efx)	(EFX_WORKAROUND_EF10(efx) ? \
 53				 EFX_MAX_DMAQ_SIZE / 2 : EFX_MAX_DMAQ_SIZE)
 54
 55static inline bool efx_rss_enabled(struct efx_nic *efx)
 56{
 57	return efx->rss_spread > 1;
 58}
 59
 60/* Filters */
 61
 62/**
 63 * efx_filter_insert_filter - add or replace a filter
 64 * @efx: NIC in which to insert the filter
 65 * @spec: Specification for the filter
 66 * @replace_equal: Flag for whether the specified filter may replace an
 67 *	existing filter with equal priority
 68 *
 69 * On success, return the filter ID.
 70 * On failure, return a negative error code.
 71 *
 72 * If existing filters have equal match values to the new filter spec,
 73 * then the new filter might replace them or the function might fail,
 74 * as follows.
 75 *
 76 * 1. If the existing filters have lower priority, or @replace_equal
 77 *    is set and they have equal priority, replace them.
 78 *
 79 * 2. If the existing filters have higher priority, return -%EPERM.
 80 *
 81 * 3. If !efx_siena_filter_is_mc_recipient(@spec), or the NIC does not
 82 *    support delivery to multiple recipients, return -%EEXIST.
 83 *
 84 * This implies that filters for multiple multicast recipients must
 85 * all be inserted with the same priority and @replace_equal = %false.
 86 */
 87static inline s32 efx_filter_insert_filter(struct efx_nic *efx,
 88					   struct efx_filter_spec *spec,
 89					   bool replace_equal)
 90{
 91	return efx->type->filter_insert(efx, spec, replace_equal);
 92}
 93
 94/**
 95 * efx_filter_remove_id_safe - remove a filter by ID, carefully
 96 * @efx: NIC from which to remove the filter
 97 * @priority: Priority of filter, as passed to @efx_filter_insert_filter
 98 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter
 99 *
100 * This function will range-check @filter_id, so it is safe to call
101 * with a value passed from userland.
102 */
103static inline int efx_filter_remove_id_safe(struct efx_nic *efx,
104					    enum efx_filter_priority priority,
105					    u32 filter_id)
106{
107	return efx->type->filter_remove_safe(efx, priority, filter_id);
108}
109
110/**
111 * efx_filter_get_filter_safe - retrieve a filter by ID, carefully
112 * @efx: NIC from which to remove the filter
113 * @priority: Priority of filter, as passed to @efx_filter_insert_filter
114 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter
115 * @spec: Buffer in which to store filter specification
116 *
117 * This function will range-check @filter_id, so it is safe to call
118 * with a value passed from userland.
119 */
120static inline int
121efx_filter_get_filter_safe(struct efx_nic *efx,
122			   enum efx_filter_priority priority,
123			   u32 filter_id, struct efx_filter_spec *spec)
124{
125	return efx->type->filter_get_safe(efx, priority, filter_id, spec);
126}
127
128static inline u32 efx_filter_count_rx_used(struct efx_nic *efx,
129					   enum efx_filter_priority priority)
130{
131	return efx->type->filter_count_rx_used(efx, priority);
132}
133static inline u32 efx_filter_get_rx_id_limit(struct efx_nic *efx)
134{
135	return efx->type->filter_get_rx_id_limit(efx);
136}
137static inline s32 efx_filter_get_rx_ids(struct efx_nic *efx,
138					enum efx_filter_priority priority,
139					u32 *buf, u32 size)
140{
141	return efx->type->filter_get_rx_ids(efx, priority, buf, size);
142}
143
144/* RSS contexts */
145static inline bool efx_rss_active(struct efx_rss_context *ctx)
146{
147	return ctx->context_id != EFX_MCDI_RSS_CONTEXT_INVALID;
148}
149
150/* Ethtool support */
151extern const struct ethtool_ops efx_siena_ethtool_ops;
152
153/* Global */
154unsigned int efx_siena_usecs_to_ticks(struct efx_nic *efx, unsigned int usecs);
155int efx_siena_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs,
156				  unsigned int rx_usecs, bool rx_adaptive,
157				  bool rx_may_override_tx);
158void efx_siena_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs,
159				  unsigned int *rx_usecs, bool *rx_adaptive);
160
161/* Update the generic software stats in the passed stats array */
162void efx_siena_update_sw_stats(struct efx_nic *efx, u64 *stats);
163
164/* MTD */
165#ifdef CONFIG_SFC_SIENA_MTD
166int efx_siena_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts,
167		      size_t n_parts, size_t sizeof_part);
168static inline int efx_mtd_probe(struct efx_nic *efx)
169{
170	return efx->type->mtd_probe(efx);
171}
172void efx_siena_mtd_rename(struct efx_nic *efx);
173void efx_siena_mtd_remove(struct efx_nic *efx);
174#else
175static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; }
176static inline void efx_siena_mtd_rename(struct efx_nic *efx) {}
177static inline void efx_siena_mtd_remove(struct efx_nic *efx) {}
178#endif
179
180#ifdef CONFIG_SFC_SIENA_SRIOV
181static inline unsigned int efx_vf_size(struct efx_nic *efx)
182{
183	return 1 << efx->vi_scale;
184}
185#endif
186
187static inline void efx_device_detach_sync(struct efx_nic *efx)
188{
189	struct net_device *dev = efx->net_dev;
190
191	/* Lock/freeze all TX queues so that we can be sure the
192	 * TX scheduler is stopped when we're done and before
193	 * netif_device_present() becomes false.
194	 */
195	netif_tx_lock_bh(dev);
196	netif_device_detach(dev);
197	netif_tx_unlock_bh(dev);
198}
199
200static inline void efx_device_attach_if_not_resetting(struct efx_nic *efx)
201{
202	if ((efx->state != STATE_DISABLED) && !efx->reset_pending)
203		netif_device_attach(efx->net_dev);
204}
205
206static inline bool efx_rwsem_assert_write_locked(struct rw_semaphore *sem)
207{
208	if (WARN_ON(down_read_trylock(sem))) {
209		up_read(sem);
210		return false;
211	}
212	return true;
213}
214
215int efx_siena_xdp_tx_buffers(struct efx_nic *efx, int n,
216			     struct xdp_frame **xdpfs, bool flush);
217
218#endif /* EFX_EFX_H */