1 /****************************************************************************
2 * Driver for Solarflare Solarstorm network controllers and boards
3 * Copyright 2005-2006 Fen Systems Ltd.
4 * Copyright 2006-2010 Solarflare Communications Inc.
5 *
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.
9 */
10
11 #ifndef EFX_EFX_H
12 #define EFX_EFX_H
13
14 #include "net_driver.h"
15 #include "filter.h"
16
17 /* Solarstorm controllers use BAR 0 for I/O space and BAR 2(&3) for memory */
18 #define EFX_MEM_BAR 2
19
20 /* TX */
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);
26 extern void efx_release_tx_buffers(struct efx_tx_queue *tx_queue);
27 extern netdev_tx_t
28 efx_hard_start_xmit(struct sk_buff *skb, struct net_device *net_dev);
29 extern netdev_tx_t
30 efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb);
31 extern void efx_xmit_done(struct efx_tx_queue *tx_queue, unsigned int index);
32 extern int efx_setup_tc(struct net_device *net_dev, u8 num_tc);
33 extern unsigned int efx_tx_max_skb_descs(struct efx_nic *efx);
34
35 /* RX */
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);
efx_rx_flush_packet(struct efx_channel * channel)47 static inline void efx_rx_flush_packet(struct efx_channel *channel)
48 {
49 if (channel->rx_pkt_n_frags)
50 __efx_rx_packet(channel);
51 }
52 extern void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
53
54 #define EFX_MAX_DMAQ_SIZE 4096UL
55 #define EFX_DEFAULT_DMAQ_SIZE 1024UL
56 #define EFX_MIN_DMAQ_SIZE 512UL
57
58 #define EFX_MAX_EVQ_SIZE 16384UL
59 #define EFX_MIN_EVQ_SIZE 512UL
60
61 /* Maximum number of TCP segments we support for soft-TSO */
62 #define EFX_TSO_MAX_SEGS 100
63
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
66 * TSO skbs.
67 */
68 #define EFX_RXQ_MIN_ENT 128U
69 #define EFX_TXQ_MIN_ENT(efx) (2 * efx_tx_max_skb_descs(efx))
70
71 /* Filters */
72 extern int efx_probe_filters(struct efx_nic *efx);
73 extern void efx_restore_filters(struct efx_nic *efx);
74 extern void efx_remove_filters(struct efx_nic *efx);
75 extern void efx_filter_update_rx_scatter(struct efx_nic *efx);
76 extern s32 efx_filter_insert_filter(struct efx_nic *efx,
77 struct efx_filter_spec *spec,
78 bool replace);
79 extern int efx_filter_remove_id_safe(struct efx_nic *efx,
80 enum efx_filter_priority priority,
81 u32 filter_id);
82 extern int efx_filter_get_filter_safe(struct efx_nic *efx,
83 enum efx_filter_priority priority,
84 u32 filter_id, struct efx_filter_spec *);
85 extern void efx_filter_clear_rx(struct efx_nic *efx,
86 enum efx_filter_priority priority);
87 extern u32 efx_filter_count_rx_used(struct efx_nic *efx,
88 enum efx_filter_priority priority);
89 extern u32 efx_filter_get_rx_id_limit(struct efx_nic *efx);
90 extern s32 efx_filter_get_rx_ids(struct efx_nic *efx,
91 enum efx_filter_priority priority,
92 u32 *buf, u32 size);
93 #ifdef CONFIG_RFS_ACCEL
94 extern int efx_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb,
95 u16 rxq_index, u32 flow_id);
96 extern bool __efx_filter_rfs_expire(struct efx_nic *efx, unsigned quota);
efx_filter_rfs_expire(struct efx_channel * channel)97 static inline void efx_filter_rfs_expire(struct efx_channel *channel)
98 {
99 if (channel->rfs_filters_added >= 60 &&
100 __efx_filter_rfs_expire(channel->efx, 100))
101 channel->rfs_filters_added -= 60;
102 }
103 #define efx_filter_rfs_enabled() 1
104 #else
efx_filter_rfs_expire(struct efx_channel * channel)105 static inline void efx_filter_rfs_expire(struct efx_channel *channel) {}
106 #define efx_filter_rfs_enabled() 0
107 #endif
108
109 /* Channels */
110 extern int efx_channel_dummy_op_int(struct efx_channel *channel);
111 extern void efx_channel_dummy_op_void(struct efx_channel *channel);
112 extern void efx_process_channel_now(struct efx_channel *channel);
113 extern int
114 efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries);
115
116 /* Ports */
117 extern int efx_reconfigure_port(struct efx_nic *efx);
118 extern int __efx_reconfigure_port(struct efx_nic *efx);
119
120 /* Ethtool support */
121 extern const struct ethtool_ops efx_ethtool_ops;
122
123 /* Reset handling */
124 extern int efx_reset(struct efx_nic *efx, enum reset_type method);
125 extern void efx_reset_down(struct efx_nic *efx, enum reset_type method);
126 extern int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok);
127
128 /* Global */
129 extern void efx_schedule_reset(struct efx_nic *efx, enum reset_type type);
130 extern int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs,
131 unsigned int rx_usecs, bool rx_adaptive,
132 bool rx_may_override_tx);
133 extern void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs,
134 unsigned int *rx_usecs, bool *rx_adaptive);
135
136 /* Dummy PHY ops for PHY drivers */
137 extern int efx_port_dummy_op_int(struct efx_nic *efx);
138 extern void efx_port_dummy_op_void(struct efx_nic *efx);
139
140
141 /* MTD */
142 #ifdef CONFIG_SFC_MTD
143 extern int efx_mtd_probe(struct efx_nic *efx);
144 extern void efx_mtd_rename(struct efx_nic *efx);
145 extern void efx_mtd_remove(struct efx_nic *efx);
146 #else
efx_mtd_probe(struct efx_nic * efx)147 static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; }
efx_mtd_rename(struct efx_nic * efx)148 static inline void efx_mtd_rename(struct efx_nic *efx) {}
efx_mtd_remove(struct efx_nic * efx)149 static inline void efx_mtd_remove(struct efx_nic *efx) {}
150 #endif
151
efx_schedule_channel(struct efx_channel * channel)152 static inline void efx_schedule_channel(struct efx_channel *channel)
153 {
154 netif_vdbg(channel->efx, intr, channel->efx->net_dev,
155 "channel %d scheduling NAPI poll on CPU%d\n",
156 channel->channel, raw_smp_processor_id());
157 channel->work_pending = true;
158
159 napi_schedule(&channel->napi_str);
160 }
161
efx_schedule_channel_irq(struct efx_channel * channel)162 static inline void efx_schedule_channel_irq(struct efx_channel *channel)
163 {
164 channel->event_test_cpu = raw_smp_processor_id();
165 efx_schedule_channel(channel);
166 }
167
168 extern void efx_link_status_changed(struct efx_nic *efx);
169 extern void efx_link_set_advertising(struct efx_nic *efx, u32);
170 extern void efx_link_set_wanted_fc(struct efx_nic *efx, u8);
171
efx_device_detach_sync(struct efx_nic * efx)172 static inline void efx_device_detach_sync(struct efx_nic *efx)
173 {
174 struct net_device *dev = efx->net_dev;
175
176 /* Lock/freeze all TX queues so that we can be sure the
177 * TX scheduler is stopped when we're done and before
178 * netif_device_present() becomes false.
179 */
180 netif_tx_lock_bh(dev);
181 netif_device_detach(dev);
182 netif_tx_unlock_bh(dev);
183 }
184
185 #endif /* EFX_EFX_H */
186