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 int efx_probe_tx_queue(struct efx_tx_queue *tx_queue);
22 void efx_remove_tx_queue(struct efx_tx_queue *tx_queue);
23 void efx_init_tx_queue(struct efx_tx_queue *tx_queue);
24 void efx_init_tx_queue_core_txq(struct efx_tx_queue *tx_queue);
25 void efx_fini_tx_queue(struct efx_tx_queue *tx_queue);
26 netdev_tx_t efx_hard_start_xmit(struct sk_buff *skb,
27 struct net_device *net_dev);
28 netdev_tx_t efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb);
29 void efx_xmit_done(struct efx_tx_queue *tx_queue, unsigned int index);
30 int efx_setup_tc(struct net_device *net_dev, u8 num_tc);
31 unsigned int efx_tx_max_skb_descs(struct efx_nic *efx);
32 extern unsigned int efx_piobuf_size;
35 void efx_rx_config_page_split(struct efx_nic *efx);
36 int efx_probe_rx_queue(struct efx_rx_queue *rx_queue);
37 void efx_remove_rx_queue(struct efx_rx_queue *rx_queue);
38 void efx_init_rx_queue(struct efx_rx_queue *rx_queue);
39 void efx_fini_rx_queue(struct efx_rx_queue *rx_queue);
40 void efx_fast_push_rx_descriptors(struct efx_rx_queue *rx_queue, bool atomic);
41 void efx_rx_slow_fill(unsigned long context);
42 void __efx_rx_packet(struct efx_channel *channel);
43 void efx_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index,
44 unsigned int n_frags, unsigned int len, u16 flags);
45 static inline void efx_rx_flush_packet(struct efx_channel *channel)
47 if (channel->rx_pkt_n_frags)
48 __efx_rx_packet(channel);
50 void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
52 #define EFX_MAX_DMAQ_SIZE 4096UL
53 #define EFX_DEFAULT_DMAQ_SIZE 1024UL
54 #define EFX_MIN_DMAQ_SIZE 512UL
56 #define EFX_MAX_EVQ_SIZE 16384UL
57 #define EFX_MIN_EVQ_SIZE 512UL
59 /* Maximum number of TCP segments we support for soft-TSO */
60 #define EFX_TSO_MAX_SEGS 100
62 /* The smallest [rt]xq_entries that the driver supports. RX minimum
63 * is a bit arbitrary. For TX, we must have space for at least 2
66 #define EFX_RXQ_MIN_ENT 128U
67 #define EFX_TXQ_MIN_ENT(efx) (2 * efx_tx_max_skb_descs(efx))
72 * efx_filter_insert_filter - add or replace a filter
73 * @efx: NIC in which to insert the filter
74 * @spec: Specification for the filter
75 * @replace_equal: Flag for whether the specified filter may replace an
76 * existing filter with equal priority
78 * On success, return the filter ID.
79 * On failure, return a negative error code.
81 * If existing filters have equal match values to the new filter spec,
82 * then the new filter might replace them or the function might fail,
85 * 1. If the existing filters have lower priority, or @replace_equal
86 * is set and they have equal priority, replace them.
88 * 2. If the existing filters have higher priority, return -%EPERM.
90 * 3. If !efx_filter_is_mc_recipient(@spec), or the NIC does not
91 * support delivery to multiple recipients, return -%EEXIST.
93 * This implies that filters for multiple multicast recipients must
94 * all be inserted with the same priority and @replace_equal = %false.
96 static inline s32 efx_filter_insert_filter(struct efx_nic *efx,
97 struct efx_filter_spec *spec,
100 return efx->type->filter_insert(efx, spec, replace_equal);
104 * efx_filter_remove_id_safe - remove a filter by ID, carefully
105 * @efx: NIC from which to remove the filter
106 * @priority: Priority of filter, as passed to @efx_filter_insert_filter
107 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter
109 * This function will range-check @filter_id, so it is safe to call
110 * with a value passed from userland.
112 static inline int efx_filter_remove_id_safe(struct efx_nic *efx,
113 enum efx_filter_priority priority,
116 return efx->type->filter_remove_safe(efx, priority, filter_id);
120 * efx_filter_get_filter_safe - retrieve a filter by ID, carefully
121 * @efx: NIC from which to remove the filter
122 * @priority: Priority of filter, as passed to @efx_filter_insert_filter
123 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter
124 * @spec: Buffer in which to store filter specification
126 * This function will range-check @filter_id, so it is safe to call
127 * with a value passed from userland.
130 efx_filter_get_filter_safe(struct efx_nic *efx,
131 enum efx_filter_priority priority,
132 u32 filter_id, struct efx_filter_spec *spec)
134 return efx->type->filter_get_safe(efx, priority, filter_id, spec);
138 * efx_farch_filter_clear_rx - remove RX filters by priority
139 * @efx: NIC from which to remove the filters
140 * @priority: Maximum priority to remove
142 * Remove all RX filters whose priority is less than or equal to the
143 * given @priority and is not %EFX_FILTER_PRI_AUTO.
145 static inline void efx_filter_clear_rx(struct efx_nic *efx,
146 enum efx_filter_priority priority)
148 return efx->type->filter_clear_rx(efx, priority);
151 static inline u32 efx_filter_count_rx_used(struct efx_nic *efx,
152 enum efx_filter_priority priority)
154 return efx->type->filter_count_rx_used(efx, priority);
156 static inline u32 efx_filter_get_rx_id_limit(struct efx_nic *efx)
158 return efx->type->filter_get_rx_id_limit(efx);
160 static inline s32 efx_filter_get_rx_ids(struct efx_nic *efx,
161 enum efx_filter_priority priority,
164 return efx->type->filter_get_rx_ids(efx, priority, buf, size);
166 #ifdef CONFIG_RFS_ACCEL
167 int efx_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb,
168 u16 rxq_index, u32 flow_id);
169 bool __efx_filter_rfs_expire(struct efx_nic *efx, unsigned quota);
170 static inline void efx_filter_rfs_expire(struct efx_channel *channel)
172 if (channel->rfs_filters_added >= 60 &&
173 __efx_filter_rfs_expire(channel->efx, 100))
174 channel->rfs_filters_added -= 60;
176 #define efx_filter_rfs_enabled() 1
178 static inline void efx_filter_rfs_expire(struct efx_channel *channel) {}
179 #define efx_filter_rfs_enabled() 0
181 bool efx_filter_is_mc_recipient(const struct efx_filter_spec *spec);
184 int efx_channel_dummy_op_int(struct efx_channel *channel);
185 void efx_channel_dummy_op_void(struct efx_channel *channel);
186 int efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries);
189 int efx_reconfigure_port(struct efx_nic *efx);
190 int __efx_reconfigure_port(struct efx_nic *efx);
192 /* Ethtool support */
193 extern const struct ethtool_ops efx_ethtool_ops;
196 int efx_reset(struct efx_nic *efx, enum reset_type method);
197 void efx_reset_down(struct efx_nic *efx, enum reset_type method);
198 int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok);
199 int efx_try_recovery(struct efx_nic *efx);
202 void efx_schedule_reset(struct efx_nic *efx, enum reset_type type);
203 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 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 int efx_port_dummy_op_int(struct efx_nic *efx);
211 void efx_port_dummy_op_void(struct efx_nic *efx);
214 #ifdef CONFIG_SFC_MTD
215 int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts,
216 size_t n_parts, size_t sizeof_part);
217 static inline int efx_mtd_probe(struct efx_nic *efx)
219 return efx->type->mtd_probe(efx);
221 void efx_mtd_rename(struct efx_nic *efx);
222 void efx_mtd_remove(struct efx_nic *efx);
224 static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; }
225 static inline void efx_mtd_rename(struct efx_nic *efx) {}
226 static inline void efx_mtd_remove(struct efx_nic *efx) {}
229 static inline void efx_schedule_channel(struct efx_channel *channel)
231 netif_vdbg(channel->efx, intr, channel->efx->net_dev,
232 "channel %d scheduling NAPI poll on CPU%d\n",
233 channel->channel, raw_smp_processor_id());
235 napi_schedule(&channel->napi_str);
238 static inline void efx_schedule_channel_irq(struct efx_channel *channel)
240 channel->event_test_cpu = raw_smp_processor_id();
241 efx_schedule_channel(channel);
244 void efx_link_status_changed(struct efx_nic *efx);
245 void efx_link_set_advertising(struct efx_nic *efx, u32);
246 void efx_link_set_wanted_fc(struct efx_nic *efx, u8);
248 static inline void efx_device_detach_sync(struct efx_nic *efx)
250 struct net_device *dev = efx->net_dev;
252 /* Lock/freeze all TX queues so that we can be sure the
253 * TX scheduler is stopped when we're done and before
254 * netif_device_present() becomes false.
256 netif_tx_lock_bh(dev);
257 netif_device_detach(dev);
258 netif_tx_unlock_bh(dev);
261 #endif /* EFX_EFX_H */