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 /* All controllers use BAR 0 for I/O space and BAR 2(&3) for memory */
18 /* All VFs use BAR 0/1 for memory */
20 #define EFX_MEM_VF_BAR 0
22 int efx_net_open(struct net_device *net_dev);
23 int efx_net_stop(struct net_device *net_dev);
26 int efx_probe_tx_queue(struct efx_tx_queue *tx_queue);
27 void efx_remove_tx_queue(struct efx_tx_queue *tx_queue);
28 void efx_init_tx_queue(struct efx_tx_queue *tx_queue);
29 void efx_init_tx_queue_core_txq(struct efx_tx_queue *tx_queue);
30 void efx_fini_tx_queue(struct efx_tx_queue *tx_queue);
31 netdev_tx_t efx_hard_start_xmit(struct sk_buff *skb,
32 struct net_device *net_dev);
33 netdev_tx_t efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb);
34 void efx_xmit_done(struct efx_tx_queue *tx_queue, unsigned int index);
35 int efx_setup_tc(struct net_device *net_dev, u8 num_tc);
36 unsigned int efx_tx_max_skb_descs(struct efx_nic *efx);
37 extern unsigned int efx_piobuf_size;
38 extern bool efx_separate_tx_channels;
41 void efx_set_default_rx_indir_table(struct efx_nic *efx);
42 void efx_rx_config_page_split(struct efx_nic *efx);
43 int efx_probe_rx_queue(struct efx_rx_queue *rx_queue);
44 void efx_remove_rx_queue(struct efx_rx_queue *rx_queue);
45 void efx_init_rx_queue(struct efx_rx_queue *rx_queue);
46 void efx_fini_rx_queue(struct efx_rx_queue *rx_queue);
47 void efx_fast_push_rx_descriptors(struct efx_rx_queue *rx_queue, bool atomic);
48 void efx_rx_slow_fill(unsigned long context);
49 void __efx_rx_packet(struct efx_channel *channel);
50 void efx_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index,
51 unsigned int n_frags, unsigned int len, u16 flags);
52 static inline void efx_rx_flush_packet(struct efx_channel *channel)
54 if (channel->rx_pkt_n_frags)
55 __efx_rx_packet(channel);
57 void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
59 #define EFX_MAX_DMAQ_SIZE 4096UL
60 #define EFX_DEFAULT_DMAQ_SIZE 1024UL
61 #define EFX_MIN_DMAQ_SIZE 512UL
63 #define EFX_MAX_EVQ_SIZE 16384UL
64 #define EFX_MIN_EVQ_SIZE 512UL
66 /* Maximum number of TCP segments we support for soft-TSO */
67 #define EFX_TSO_MAX_SEGS 100
69 /* The smallest [rt]xq_entries that the driver supports. RX minimum
70 * is a bit arbitrary. For TX, we must have space for at least 2
73 #define EFX_RXQ_MIN_ENT 128U
74 #define EFX_TXQ_MIN_ENT(efx) (2 * efx_tx_max_skb_descs(efx))
76 #define EFX_TXQ_MAX_ENT(efx) (EFX_WORKAROUND_35388(efx) ? \
77 EFX_MAX_DMAQ_SIZE / 2 : EFX_MAX_DMAQ_SIZE)
79 static inline bool efx_rss_enabled(struct efx_nic *efx)
81 return efx->rss_spread > 1;
86 void efx_mac_reconfigure(struct efx_nic *efx);
89 * efx_filter_insert_filter - add or replace a filter
90 * @efx: NIC in which to insert the filter
91 * @spec: Specification for the filter
92 * @replace_equal: Flag for whether the specified filter may replace an
93 * existing filter with equal priority
95 * On success, return the filter ID.
96 * On failure, return a negative error code.
98 * If existing filters have equal match values to the new filter spec,
99 * then the new filter might replace them or the function might fail,
102 * 1. If the existing filters have lower priority, or @replace_equal
103 * is set and they have equal priority, replace them.
105 * 2. If the existing filters have higher priority, return -%EPERM.
107 * 3. If !efx_filter_is_mc_recipient(@spec), or the NIC does not
108 * support delivery to multiple recipients, return -%EEXIST.
110 * This implies that filters for multiple multicast recipients must
111 * all be inserted with the same priority and @replace_equal = %false.
113 static inline s32 efx_filter_insert_filter(struct efx_nic *efx,
114 struct efx_filter_spec *spec,
117 return efx->type->filter_insert(efx, spec, replace_equal);
121 * efx_filter_remove_id_safe - remove a filter by ID, carefully
122 * @efx: NIC from which to remove the filter
123 * @priority: Priority of filter, as passed to @efx_filter_insert_filter
124 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter
126 * This function will range-check @filter_id, so it is safe to call
127 * with a value passed from userland.
129 static inline int efx_filter_remove_id_safe(struct efx_nic *efx,
130 enum efx_filter_priority priority,
133 return efx->type->filter_remove_safe(efx, priority, filter_id);
137 * efx_filter_get_filter_safe - retrieve a filter by ID, carefully
138 * @efx: NIC from which to remove the filter
139 * @priority: Priority of filter, as passed to @efx_filter_insert_filter
140 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter
141 * @spec: Buffer in which to store filter specification
143 * This function will range-check @filter_id, so it is safe to call
144 * with a value passed from userland.
147 efx_filter_get_filter_safe(struct efx_nic *efx,
148 enum efx_filter_priority priority,
149 u32 filter_id, struct efx_filter_spec *spec)
151 return efx->type->filter_get_safe(efx, priority, filter_id, spec);
154 static inline u32 efx_filter_count_rx_used(struct efx_nic *efx,
155 enum efx_filter_priority priority)
157 return efx->type->filter_count_rx_used(efx, priority);
159 static inline u32 efx_filter_get_rx_id_limit(struct efx_nic *efx)
161 return efx->type->filter_get_rx_id_limit(efx);
163 static inline s32 efx_filter_get_rx_ids(struct efx_nic *efx,
164 enum efx_filter_priority priority,
167 return efx->type->filter_get_rx_ids(efx, priority, buf, size);
169 #ifdef CONFIG_RFS_ACCEL
170 int efx_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb,
171 u16 rxq_index, u32 flow_id);
172 bool __efx_filter_rfs_expire(struct efx_nic *efx, unsigned quota);
173 static inline void efx_filter_rfs_expire(struct efx_channel *channel)
175 if (channel->rfs_filters_added >= 60 &&
176 __efx_filter_rfs_expire(channel->efx, 100))
177 channel->rfs_filters_added -= 60;
179 #define efx_filter_rfs_enabled() 1
181 static inline void efx_filter_rfs_expire(struct efx_channel *channel) {}
182 #define efx_filter_rfs_enabled() 0
184 bool efx_filter_is_mc_recipient(const struct efx_filter_spec *spec);
187 int efx_channel_dummy_op_int(struct efx_channel *channel);
188 void efx_channel_dummy_op_void(struct efx_channel *channel);
189 int efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries);
192 int efx_reconfigure_port(struct efx_nic *efx);
193 int __efx_reconfigure_port(struct efx_nic *efx);
195 /* Ethtool support */
196 extern const struct ethtool_ops efx_ethtool_ops;
199 int efx_reset(struct efx_nic *efx, enum reset_type method);
200 void efx_reset_down(struct efx_nic *efx, enum reset_type method);
201 int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok);
202 int efx_try_recovery(struct efx_nic *efx);
205 void efx_schedule_reset(struct efx_nic *efx, enum reset_type type);
206 int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs,
207 unsigned int rx_usecs, bool rx_adaptive,
208 bool rx_may_override_tx);
209 void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs,
210 unsigned int *rx_usecs, bool *rx_adaptive);
211 void efx_stop_eventq(struct efx_channel *channel);
212 void efx_start_eventq(struct efx_channel *channel);
214 /* Dummy PHY ops for PHY drivers */
215 int efx_port_dummy_op_int(struct efx_nic *efx);
216 void efx_port_dummy_op_void(struct efx_nic *efx);
218 /* Update the generic software stats in the passed stats array */
219 void efx_update_sw_stats(struct efx_nic *efx, u64 *stats);
222 #ifdef CONFIG_SFC_MTD
223 int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts,
224 size_t n_parts, size_t sizeof_part);
225 static inline int efx_mtd_probe(struct efx_nic *efx)
227 return efx->type->mtd_probe(efx);
229 void efx_mtd_rename(struct efx_nic *efx);
230 void efx_mtd_remove(struct efx_nic *efx);
232 static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; }
233 static inline void efx_mtd_rename(struct efx_nic *efx) {}
234 static inline void efx_mtd_remove(struct efx_nic *efx) {}
237 #ifdef CONFIG_SFC_SRIOV
238 static inline unsigned int efx_vf_size(struct efx_nic *efx)
240 return 1 << efx->vi_scale;
244 static inline void efx_schedule_channel(struct efx_channel *channel)
246 netif_vdbg(channel->efx, intr, channel->efx->net_dev,
247 "channel %d scheduling NAPI poll on CPU%d\n",
248 channel->channel, raw_smp_processor_id());
250 napi_schedule(&channel->napi_str);
253 static inline void efx_schedule_channel_irq(struct efx_channel *channel)
255 channel->event_test_cpu = raw_smp_processor_id();
256 efx_schedule_channel(channel);
259 void efx_link_status_changed(struct efx_nic *efx);
260 void efx_link_set_advertising(struct efx_nic *efx, u32);
261 void efx_link_set_wanted_fc(struct efx_nic *efx, u8);
263 static inline void efx_device_detach_sync(struct efx_nic *efx)
265 struct net_device *dev = efx->net_dev;
267 /* Lock/freeze all TX queues so that we can be sure the
268 * TX scheduler is stopped when we're done and before
269 * netif_device_present() becomes false.
271 netif_tx_lock_bh(dev);
272 netif_device_detach(dev);
273 netif_tx_unlock_bh(dev);
276 #endif /* EFX_EFX_H */