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.
11 #include <linux/indirect_call_wrapper.h>
12 #include "net_driver.h"
15 #include "efx_common.h"
18 int efx_net_open(struct net_device *net_dev);
19 int efx_net_stop(struct net_device *net_dev);
22 void efx_init_tx_queue_core_txq(struct efx_tx_queue *tx_queue);
23 netdev_tx_t efx_hard_start_xmit(struct sk_buff *skb,
24 struct net_device *net_dev);
25 netdev_tx_t __efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb);
26 static inline netdev_tx_t efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb)
28 return INDIRECT_CALL_2(tx_queue->efx->type->tx_enqueue,
29 ef100_enqueue_skb, __efx_enqueue_skb,
32 void efx_xmit_done_single(struct efx_tx_queue *tx_queue);
33 int efx_setup_tc(struct net_device *net_dev, enum tc_setup_type type,
35 extern unsigned int efx_piobuf_size;
38 void __efx_rx_packet(struct efx_channel *channel);
39 void efx_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index,
40 unsigned int n_frags, unsigned int len, u16 flags);
41 static inline void efx_rx_flush_packet(struct efx_channel *channel)
43 if (channel->rx_pkt_n_frags)
44 INDIRECT_CALL_2(channel->efx->type->rx_packet,
45 __ef100_rx_packet, __efx_rx_packet,
48 static inline bool efx_rx_buf_hash_valid(struct efx_nic *efx, const u8 *prefix)
50 if (efx->type->rx_buf_hash_valid)
51 return INDIRECT_CALL_1(efx->type->rx_buf_hash_valid,
52 ef100_rx_buf_hash_valid,
57 /* Maximum number of TCP segments we support for soft-TSO */
58 #define EFX_TSO_MAX_SEGS 100
60 /* The smallest [rt]xq_entries that the driver supports. RX minimum
61 * is a bit arbitrary. For TX, we must have space for at least 2
64 #define EFX_RXQ_MIN_ENT 128U
65 #define EFX_TXQ_MIN_ENT(efx) (2 * efx_tx_max_skb_descs(efx))
67 /* All EF10 architecture NICs steal one bit of the DMAQ size for various
68 * other purposes when counting TxQ entries, so we halve the queue size.
70 #define EFX_TXQ_MAX_ENT(efx) (EFX_WORKAROUND_EF10(efx) ? \
71 EFX_MAX_DMAQ_SIZE / 2 : EFX_MAX_DMAQ_SIZE)
73 static inline bool efx_rss_enabled(struct efx_nic *efx)
75 return efx->rss_spread > 1;
81 * efx_filter_insert_filter - add or replace a filter
82 * @efx: NIC in which to insert the filter
83 * @spec: Specification for the filter
84 * @replace_equal: Flag for whether the specified filter may replace an
85 * existing filter with equal priority
87 * On success, return the filter ID.
88 * On failure, return a negative error code.
90 * If existing filters have equal match values to the new filter spec,
91 * then the new filter might replace them or the function might fail,
94 * 1. If the existing filters have lower priority, or @replace_equal
95 * is set and they have equal priority, replace them.
97 * 2. If the existing filters have higher priority, return -%EPERM.
99 * 3. If !efx_filter_is_mc_recipient(@spec), or the NIC does not
100 * support delivery to multiple recipients, return -%EEXIST.
102 * This implies that filters for multiple multicast recipients must
103 * all be inserted with the same priority and @replace_equal = %false.
105 static inline s32 efx_filter_insert_filter(struct efx_nic *efx,
106 struct efx_filter_spec *spec,
109 return efx->type->filter_insert(efx, spec, replace_equal);
113 * efx_filter_remove_id_safe - remove a filter by ID, carefully
114 * @efx: NIC from which to remove the filter
115 * @priority: Priority of filter, as passed to @efx_filter_insert_filter
116 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter
118 * This function will range-check @filter_id, so it is safe to call
119 * with a value passed from userland.
121 static inline int efx_filter_remove_id_safe(struct efx_nic *efx,
122 enum efx_filter_priority priority,
125 return efx->type->filter_remove_safe(efx, priority, filter_id);
129 * efx_filter_get_filter_safe - retrieve a filter by ID, carefully
130 * @efx: NIC from which to remove the filter
131 * @priority: Priority of filter, as passed to @efx_filter_insert_filter
132 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter
133 * @spec: Buffer in which to store filter specification
135 * This function will range-check @filter_id, so it is safe to call
136 * with a value passed from userland.
139 efx_filter_get_filter_safe(struct efx_nic *efx,
140 enum efx_filter_priority priority,
141 u32 filter_id, struct efx_filter_spec *spec)
143 return efx->type->filter_get_safe(efx, priority, filter_id, spec);
146 static inline u32 efx_filter_count_rx_used(struct efx_nic *efx,
147 enum efx_filter_priority priority)
149 return efx->type->filter_count_rx_used(efx, priority);
151 static inline u32 efx_filter_get_rx_id_limit(struct efx_nic *efx)
153 return efx->type->filter_get_rx_id_limit(efx);
155 static inline s32 efx_filter_get_rx_ids(struct efx_nic *efx,
156 enum efx_filter_priority priority,
159 return efx->type->filter_get_rx_ids(efx, priority, buf, size);
163 static inline bool efx_rss_active(struct efx_rss_context *ctx)
165 return ctx->context_id != EFX_MCDI_RSS_CONTEXT_INVALID;
168 /* Ethtool support */
169 extern const struct ethtool_ops efx_ethtool_ops;
172 unsigned int efx_usecs_to_ticks(struct efx_nic *efx, unsigned int usecs);
173 unsigned int efx_ticks_to_usecs(struct efx_nic *efx, unsigned int ticks);
174 int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs,
175 unsigned int rx_usecs, bool rx_adaptive,
176 bool rx_may_override_tx);
177 void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs,
178 unsigned int *rx_usecs, bool *rx_adaptive);
180 /* Update the generic software stats in the passed stats array */
181 void efx_update_sw_stats(struct efx_nic *efx, u64 *stats);
184 #ifdef CONFIG_SFC_MTD
185 int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts,
186 size_t n_parts, size_t sizeof_part);
187 static inline int efx_mtd_probe(struct efx_nic *efx)
189 return efx->type->mtd_probe(efx);
191 void efx_mtd_rename(struct efx_nic *efx);
192 void efx_mtd_remove(struct efx_nic *efx);
194 static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; }
195 static inline void efx_mtd_rename(struct efx_nic *efx) {}
196 static inline void efx_mtd_remove(struct efx_nic *efx) {}
199 #ifdef CONFIG_SFC_SRIOV
200 static inline unsigned int efx_vf_size(struct efx_nic *efx)
202 return 1 << efx->vi_scale;
206 static inline void efx_device_detach_sync(struct efx_nic *efx)
208 struct net_device *dev = efx->net_dev;
210 /* We must stop reps (which use our TX) before we stop ourselves. */
211 efx_detach_reps(efx);
213 /* Lock/freeze all TX queues so that we can be sure the
214 * TX scheduler is stopped when we're done and before
215 * netif_device_present() becomes false.
217 netif_tx_lock_bh(dev);
218 netif_device_detach(dev);
219 netif_tx_unlock_bh(dev);
222 static inline void efx_device_attach_if_not_resetting(struct efx_nic *efx)
224 if ((efx->state != STATE_DISABLED) && !efx->reset_pending) {
225 netif_device_attach(efx->net_dev);
226 if (efx->state == STATE_NET_UP)
227 efx_attach_reps(efx);
231 static inline bool efx_rwsem_assert_write_locked(struct rw_semaphore *sem)
233 if (WARN_ON(down_read_trylock(sem))) {
240 int efx_xdp_tx_buffers(struct efx_nic *efx, int n, struct xdp_frame **xdpfs,
243 #endif /* EFX_EFX_H */