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
);
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 static inline void efx_filter_clear_rx(struct efx_nic
*efx
,
143 enum efx_filter_priority priority
)
145 return efx
->type
->filter_clear_rx(efx
, priority
);
148 static inline u32
efx_filter_count_rx_used(struct efx_nic
*efx
,
149 enum efx_filter_priority priority
)
151 return efx
->type
->filter_count_rx_used(efx
, priority
);
153 static inline u32
efx_filter_get_rx_id_limit(struct efx_nic
*efx
)
155 return efx
->type
->filter_get_rx_id_limit(efx
);
157 static inline s32
efx_filter_get_rx_ids(struct efx_nic
*efx
,
158 enum efx_filter_priority priority
,
161 return efx
->type
->filter_get_rx_ids(efx
, priority
, buf
, size
);
163 #ifdef CONFIG_RFS_ACCEL
164 int efx_filter_rfs(struct net_device
*net_dev
, const struct sk_buff
*skb
,
165 u16 rxq_index
, u32 flow_id
);
166 bool __efx_filter_rfs_expire(struct efx_nic
*efx
, unsigned quota
);
167 static inline void efx_filter_rfs_expire(struct efx_channel
*channel
)
169 if (channel
->rfs_filters_added
>= 60 &&
170 __efx_filter_rfs_expire(channel
->efx
, 100))
171 channel
->rfs_filters_added
-= 60;
173 #define efx_filter_rfs_enabled() 1
175 static inline void efx_filter_rfs_expire(struct efx_channel
*channel
) {}
176 #define efx_filter_rfs_enabled() 0
178 bool efx_filter_is_mc_recipient(const struct efx_filter_spec
*spec
);
181 int efx_channel_dummy_op_int(struct efx_channel
*channel
);
182 void efx_channel_dummy_op_void(struct efx_channel
*channel
);
183 int efx_realloc_channels(struct efx_nic
*efx
, u32 rxq_entries
, u32 txq_entries
);
186 int efx_reconfigure_port(struct efx_nic
*efx
);
187 int __efx_reconfigure_port(struct efx_nic
*efx
);
189 /* Ethtool support */
190 extern const struct ethtool_ops efx_ethtool_ops
;
193 int efx_reset(struct efx_nic
*efx
, enum reset_type method
);
194 void efx_reset_down(struct efx_nic
*efx
, enum reset_type method
);
195 int efx_reset_up(struct efx_nic
*efx
, enum reset_type method
, bool ok
);
196 int efx_try_recovery(struct efx_nic
*efx
);
199 void efx_schedule_reset(struct efx_nic
*efx
, enum reset_type type
);
200 int efx_init_irq_moderation(struct efx_nic
*efx
, unsigned int tx_usecs
,
201 unsigned int rx_usecs
, bool rx_adaptive
,
202 bool rx_may_override_tx
);
203 void efx_get_irq_moderation(struct efx_nic
*efx
, unsigned int *tx_usecs
,
204 unsigned int *rx_usecs
, bool *rx_adaptive
);
206 /* Dummy PHY ops for PHY drivers */
207 int efx_port_dummy_op_int(struct efx_nic
*efx
);
208 void efx_port_dummy_op_void(struct efx_nic
*efx
);
211 #ifdef CONFIG_SFC_MTD
212 int efx_mtd_add(struct efx_nic
*efx
, struct efx_mtd_partition
*parts
,
213 size_t n_parts
, size_t sizeof_part
);
214 static inline int efx_mtd_probe(struct efx_nic
*efx
)
216 return efx
->type
->mtd_probe(efx
);
218 void efx_mtd_rename(struct efx_nic
*efx
);
219 void efx_mtd_remove(struct efx_nic
*efx
);
221 static inline int efx_mtd_probe(struct efx_nic
*efx
) { return 0; }
222 static inline void efx_mtd_rename(struct efx_nic
*efx
) {}
223 static inline void efx_mtd_remove(struct efx_nic
*efx
) {}
226 static inline void efx_schedule_channel(struct efx_channel
*channel
)
228 netif_vdbg(channel
->efx
, intr
, channel
->efx
->net_dev
,
229 "channel %d scheduling NAPI poll on CPU%d\n",
230 channel
->channel
, raw_smp_processor_id());
232 napi_schedule(&channel
->napi_str
);
235 static inline void efx_schedule_channel_irq(struct efx_channel
*channel
)
237 channel
->event_test_cpu
= raw_smp_processor_id();
238 efx_schedule_channel(channel
);
241 void efx_link_status_changed(struct efx_nic
*efx
);
242 void efx_link_set_advertising(struct efx_nic
*efx
, u32
);
243 void efx_link_set_wanted_fc(struct efx_nic
*efx
, u8
);
245 static inline void efx_device_detach_sync(struct efx_nic
*efx
)
247 struct net_device
*dev
= efx
->net_dev
;
249 /* Lock/freeze all TX queues so that we can be sure the
250 * TX scheduler is stopped when we're done and before
251 * netif_device_present() becomes false.
253 netif_tx_lock_bh(dev
);
254 netif_device_detach(dev
);
255 netif_tx_unlock_bh(dev
);
258 #endif /* EFX_EFX_H */