1 /****************************************************************************
2 * Driver for Solarflare network controllers and boards
3 * Copyright 2005-2006 Fen Systems Ltd.
4 * Copyright 2006-2013 Solarflare Communications Inc.
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published
8 * by the Free Software Foundation, incorporated herein by reference.
14 #include "net_driver.h"
17 /* Solarstorm controllers use BAR 0 for I/O space and BAR 2(&3) for memory */
21 extern int efx_probe_tx_queue(struct efx_tx_queue *tx_queue);
22 extern void efx_remove_tx_queue(struct efx_tx_queue *tx_queue);
23 extern void efx_init_tx_queue(struct efx_tx_queue *tx_queue);
24 extern void efx_init_tx_queue_core_txq(struct efx_tx_queue *tx_queue);
25 extern void efx_fini_tx_queue(struct efx_tx_queue *tx_queue);
27 efx_hard_start_xmit(struct sk_buff *skb, struct net_device *net_dev);
29 efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb);
30 extern void efx_xmit_done(struct efx_tx_queue *tx_queue, unsigned int index);
31 extern int efx_setup_tc(struct net_device *net_dev, u8 num_tc);
32 extern unsigned int efx_tx_max_skb_descs(struct efx_nic *efx);
33 extern unsigned int efx_piobuf_size;
36 extern void efx_rx_config_page_split(struct efx_nic *efx);
37 extern int efx_probe_rx_queue(struct efx_rx_queue *rx_queue);
38 extern void efx_remove_rx_queue(struct efx_rx_queue *rx_queue);
39 extern void efx_init_rx_queue(struct efx_rx_queue *rx_queue);
40 extern void efx_fini_rx_queue(struct efx_rx_queue *rx_queue);
41 extern void efx_fast_push_rx_descriptors(struct efx_rx_queue *rx_queue);
42 extern void efx_rx_slow_fill(unsigned long context);
43 extern void __efx_rx_packet(struct efx_channel *channel);
44 extern void efx_rx_packet(struct efx_rx_queue *rx_queue,
45 unsigned int index, unsigned int n_frags,
46 unsigned int len, u16 flags);
47 static inline void efx_rx_flush_packet(struct efx_channel *channel)
49 if (channel->rx_pkt_n_frags)
50 __efx_rx_packet(channel);
52 extern void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
54 #define EFX_MAX_DMAQ_SIZE 4096UL
55 #define EFX_DEFAULT_DMAQ_SIZE 1024UL
56 #define EFX_MIN_DMAQ_SIZE 512UL
58 #define EFX_MAX_EVQ_SIZE 16384UL
59 #define EFX_MIN_EVQ_SIZE 512UL
61 /* Maximum number of TCP segments we support for soft-TSO */
62 #define EFX_TSO_MAX_SEGS 100
64 /* The smallest [rt]xq_entries that the driver supports. RX minimum
65 * is a bit arbitrary. For TX, we must have space for at least 2
68 #define EFX_RXQ_MIN_ENT 128U
69 #define EFX_TXQ_MIN_ENT(efx) (2 * efx_tx_max_skb_descs(efx))
74 * efx_filter_insert_filter - add or replace a filter
75 * @efx: NIC in which to insert the filter
76 * @spec: Specification for the filter
77 * @replace_equal: Flag for whether the specified filter may replace an
78 * existing filter with equal priority
80 * On success, return the filter ID.
81 * On failure, return a negative error code.
83 * If existing filters have equal match values to the new filter spec,
84 * then the new filter might replace them or the function might fail,
87 * 1. If the existing filters have lower priority, or @replace_equal
88 * is set and they have equal priority, replace them.
90 * 2. If the existing filters have higher priority, return -%EPERM.
92 * 3. If !efx_filter_is_mc_recipient(@spec), or the NIC does not
93 * support delivery to multiple recipients, return -%EEXIST.
95 * This implies that filters for multiple multicast recipients must
96 * all be inserted with the same priority and @replace_equal = %false.
98 static inline s32 efx_filter_insert_filter(struct efx_nic *efx,
99 struct efx_filter_spec *spec,
102 return efx->type->filter_insert(efx, spec, replace_equal);
106 * efx_filter_remove_id_safe - remove a filter by ID, carefully
107 * @efx: NIC from which to remove the filter
108 * @priority: Priority of filter, as passed to @efx_filter_insert_filter
109 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter
111 * This function will range-check @filter_id, so it is safe to call
112 * with a value passed from userland.
114 static inline int efx_filter_remove_id_safe(struct efx_nic *efx,
115 enum efx_filter_priority priority,
118 return efx->type->filter_remove_safe(efx, priority, filter_id);
122 * efx_filter_get_filter_safe - retrieve a filter by ID, carefully
123 * @efx: NIC from which to remove the filter
124 * @priority: Priority of filter, as passed to @efx_filter_insert_filter
125 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter
126 * @spec: Buffer in which to store filter specification
128 * This function will range-check @filter_id, so it is safe to call
129 * with a value passed from userland.
132 efx_filter_get_filter_safe(struct efx_nic *efx,
133 enum efx_filter_priority priority,
134 u32 filter_id, struct efx_filter_spec *spec)
136 return efx->type->filter_get_safe(efx, priority, filter_id, spec);
140 * efx_farch_filter_clear_rx - remove RX filters by priority
141 * @efx: NIC from which to remove the filters
142 * @priority: Maximum priority to remove
144 static inline void efx_filter_clear_rx(struct efx_nic *efx,
145 enum efx_filter_priority priority)
147 return efx->type->filter_clear_rx(efx, priority);
150 static inline u32 efx_filter_count_rx_used(struct efx_nic *efx,
151 enum efx_filter_priority priority)
153 return efx->type->filter_count_rx_used(efx, priority);
155 static inline u32 efx_filter_get_rx_id_limit(struct efx_nic *efx)
157 return efx->type->filter_get_rx_id_limit(efx);
159 static inline s32 efx_filter_get_rx_ids(struct efx_nic *efx,
160 enum efx_filter_priority priority,
163 return efx->type->filter_get_rx_ids(efx, priority, buf, size);
165 #ifdef CONFIG_RFS_ACCEL
166 extern int efx_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb,
167 u16 rxq_index, u32 flow_id);
168 extern bool __efx_filter_rfs_expire(struct efx_nic *efx, unsigned quota);
169 static inline void efx_filter_rfs_expire(struct efx_channel *channel)
171 if (channel->rfs_filters_added >= 60 &&
172 __efx_filter_rfs_expire(channel->efx, 100))
173 channel->rfs_filters_added -= 60;
175 #define efx_filter_rfs_enabled() 1
177 static inline void efx_filter_rfs_expire(struct efx_channel *channel) {}
178 #define efx_filter_rfs_enabled() 0
180 extern bool efx_filter_is_mc_recipient(const struct efx_filter_spec *spec);
183 extern int efx_channel_dummy_op_int(struct efx_channel *channel);
184 extern void efx_channel_dummy_op_void(struct efx_channel *channel);
186 efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries);
189 extern int efx_reconfigure_port(struct efx_nic *efx);
190 extern int __efx_reconfigure_port(struct efx_nic *efx);
192 /* Ethtool support */
193 extern const struct ethtool_ops efx_ethtool_ops;
196 extern int efx_reset(struct efx_nic *efx, enum reset_type method);
197 extern void efx_reset_down(struct efx_nic *efx, enum reset_type method);
198 extern int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok);
199 extern int efx_try_recovery(struct efx_nic *efx);
202 extern void efx_schedule_reset(struct efx_nic *efx, enum reset_type type);
203 extern int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs,
204 unsigned int rx_usecs, bool rx_adaptive,
205 bool rx_may_override_tx);
206 extern void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs,
207 unsigned int *rx_usecs, bool *rx_adaptive);
209 /* Dummy PHY ops for PHY drivers */
210 extern int efx_port_dummy_op_int(struct efx_nic *efx);
211 extern void efx_port_dummy_op_void(struct efx_nic *efx);
215 #ifdef CONFIG_SFC_MTD
216 extern int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts,
217 size_t n_parts, size_t sizeof_part);
218 static inline int efx_mtd_probe(struct efx_nic *efx)
220 return efx->type->mtd_probe(efx);
222 extern void efx_mtd_rename(struct efx_nic *efx);
223 extern void efx_mtd_remove(struct efx_nic *efx);
225 static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; }
226 static inline void efx_mtd_rename(struct efx_nic *efx) {}
227 static inline void efx_mtd_remove(struct efx_nic *efx) {}
230 static inline void efx_schedule_channel(struct efx_channel *channel)
232 netif_vdbg(channel->efx, intr, channel->efx->net_dev,
233 "channel %d scheduling NAPI poll on CPU%d\n",
234 channel->channel, raw_smp_processor_id());
236 napi_schedule(&channel->napi_str);
239 static inline void efx_schedule_channel_irq(struct efx_channel *channel)
241 channel->event_test_cpu = raw_smp_processor_id();
242 efx_schedule_channel(channel);
245 extern void efx_link_status_changed(struct efx_nic *efx);
246 extern void efx_link_set_advertising(struct efx_nic *efx, u32);
247 extern void efx_link_set_wanted_fc(struct efx_nic *efx, u8);
249 static inline void efx_device_detach_sync(struct efx_nic *efx)
251 struct net_device *dev = efx->net_dev;
253 /* Lock/freeze all TX queues so that we can be sure the
254 * TX scheduler is stopped when we're done and before
255 * netif_device_present() becomes false.
257 netif_tx_lock_bh(dev);
258 netif_device_detach(dev);
259 netif_tx_unlock_bh(dev);
262 #endif /* EFX_EFX_H */