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1/****************************************************************************
2 * Driver for Solarflare network controllers and boards
3 * Copyright 2005-2006 Fen Systems Ltd.
4 * Copyright 2006-2013 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/* All controllers use BAR 0 for I/O space and BAR 2(&3) for memory */
18#define EFX_MEM_BAR 2
19
20/* TX */
21int efx_probe_tx_queue(struct efx_tx_queue *tx_queue);
22void efx_remove_tx_queue(struct efx_tx_queue *tx_queue);
23void efx_init_tx_queue(struct efx_tx_queue *tx_queue);
24void efx_init_tx_queue_core_txq(struct efx_tx_queue *tx_queue);
25void efx_fini_tx_queue(struct efx_tx_queue *tx_queue);
26netdev_tx_t efx_hard_start_xmit(struct sk_buff *skb,
27 struct net_device *net_dev);
28netdev_tx_t efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb);
29void efx_xmit_done(struct efx_tx_queue *tx_queue, unsigned int index);
30int efx_setup_tc(struct net_device *net_dev, u8 num_tc);
31unsigned int efx_tx_max_skb_descs(struct efx_nic *efx);
32extern unsigned int efx_piobuf_size;
33
34/* RX */
35void efx_rx_config_page_split(struct efx_nic *efx);
36int efx_probe_rx_queue(struct efx_rx_queue *rx_queue);
37void efx_remove_rx_queue(struct efx_rx_queue *rx_queue);
38void efx_init_rx_queue(struct efx_rx_queue *rx_queue);
39void efx_fini_rx_queue(struct efx_rx_queue *rx_queue);
40void efx_fast_push_rx_descriptors(struct efx_rx_queue *rx_queue, bool atomic);
41void efx_rx_slow_fill(unsigned long context);
42void __efx_rx_packet(struct efx_channel *channel);
43void efx_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index,
44 unsigned int n_frags, unsigned int len, u16 flags);
45static inline void efx_rx_flush_packet(struct efx_channel *channel)
46{
47 if (channel->rx_pkt_n_frags)
48 __efx_rx_packet(channel);
49}
50void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
51
52#define EFX_MAX_DMAQ_SIZE 4096UL
53#define EFX_DEFAULT_DMAQ_SIZE 1024UL
54#define EFX_MIN_DMAQ_SIZE 512UL
55
56#define EFX_MAX_EVQ_SIZE 16384UL
57#define EFX_MIN_EVQ_SIZE 512UL
58
59/* Maximum number of TCP segments we support for soft-TSO */
60#define EFX_TSO_MAX_SEGS 100
61
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
64 * TSO skbs.
65 */
66#define EFX_RXQ_MIN_ENT 128U
67#define EFX_TXQ_MIN_ENT(efx) (2 * efx_tx_max_skb_descs(efx))
68
69#define EFX_TXQ_MAX_ENT(efx) (EFX_WORKAROUND_35388(efx) ? \
70 EFX_MAX_DMAQ_SIZE / 2 : EFX_MAX_DMAQ_SIZE)
71
72/* Filters */
73
74/**
75 * efx_filter_insert_filter - add or replace a filter
76 * @efx: NIC in which to insert the filter
77 * @spec: Specification for the filter
78 * @replace_equal: Flag for whether the specified filter may replace an
79 * existing filter with equal priority
80 *
81 * On success, return the filter ID.
82 * On failure, return a negative error code.
83 *
84 * If existing filters have equal match values to the new filter spec,
85 * then the new filter might replace them or the function might fail,
86 * as follows.
87 *
88 * 1. If the existing filters have lower priority, or @replace_equal
89 * is set and they have equal priority, replace them.
90 *
91 * 2. If the existing filters have higher priority, return -%EPERM.
92 *
93 * 3. If !efx_filter_is_mc_recipient(@spec), or the NIC does not
94 * support delivery to multiple recipients, return -%EEXIST.
95 *
96 * This implies that filters for multiple multicast recipients must
97 * all be inserted with the same priority and @replace_equal = %false.
98 */
99static inline s32 efx_filter_insert_filter(struct efx_nic *efx,
100 struct efx_filter_spec *spec,
101 bool replace_equal)
102{
103 return efx->type->filter_insert(efx, spec, replace_equal);
104}
105
106/**
107 * efx_filter_remove_id_safe - remove a filter by ID, carefully
108 * @efx: NIC from which to remove the filter
109 * @priority: Priority of filter, as passed to @efx_filter_insert_filter
110 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter
111 *
112 * This function will range-check @filter_id, so it is safe to call
113 * with a value passed from userland.
114 */
115static inline int efx_filter_remove_id_safe(struct efx_nic *efx,
116 enum efx_filter_priority priority,
117 u32 filter_id)
118{
119 return efx->type->filter_remove_safe(efx, priority, filter_id);
120}
121
122/**
123 * efx_filter_get_filter_safe - retrieve a filter by ID, carefully
124 * @efx: NIC from which to remove the filter
125 * @priority: Priority of filter, as passed to @efx_filter_insert_filter
126 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter
127 * @spec: Buffer in which to store filter specification
128 *
129 * This function will range-check @filter_id, so it is safe to call
130 * with a value passed from userland.
131 */
132static inline int
133efx_filter_get_filter_safe(struct efx_nic *efx,
134 enum efx_filter_priority priority,
135 u32 filter_id, struct efx_filter_spec *spec)
136{
137 return efx->type->filter_get_safe(efx, priority, filter_id, spec);
138}
139
140static inline u32 efx_filter_count_rx_used(struct efx_nic *efx,
141 enum efx_filter_priority priority)
142{
143 return efx->type->filter_count_rx_used(efx, priority);
144}
145static inline u32 efx_filter_get_rx_id_limit(struct efx_nic *efx)
146{
147 return efx->type->filter_get_rx_id_limit(efx);
148}
149static inline s32 efx_filter_get_rx_ids(struct efx_nic *efx,
150 enum efx_filter_priority priority,
151 u32 *buf, u32 size)
152{
153 return efx->type->filter_get_rx_ids(efx, priority, buf, size);
154}
155#ifdef CONFIG_RFS_ACCEL
156int efx_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb,
157 u16 rxq_index, u32 flow_id);
158bool __efx_filter_rfs_expire(struct efx_nic *efx, unsigned quota);
159static inline void efx_filter_rfs_expire(struct efx_channel *channel)
160{
161 if (channel->rfs_filters_added >= 60 &&
162 __efx_filter_rfs_expire(channel->efx, 100))
163 channel->rfs_filters_added -= 60;
164}
165#define efx_filter_rfs_enabled() 1
166#else
167static inline void efx_filter_rfs_expire(struct efx_channel *channel) {}
168#define efx_filter_rfs_enabled() 0
169#endif
170bool efx_filter_is_mc_recipient(const struct efx_filter_spec *spec);
171
172/* Channels */
173int efx_channel_dummy_op_int(struct efx_channel *channel);
174void efx_channel_dummy_op_void(struct efx_channel *channel);
175int efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries);
176
177/* Ports */
178int efx_reconfigure_port(struct efx_nic *efx);
179int __efx_reconfigure_port(struct efx_nic *efx);
180
181/* Ethtool support */
182extern const struct ethtool_ops efx_ethtool_ops;
183
184/* Reset handling */
185int efx_reset(struct efx_nic *efx, enum reset_type method);
186void efx_reset_down(struct efx_nic *efx, enum reset_type method);
187int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok);
188int efx_try_recovery(struct efx_nic *efx);
189
190/* Global */
191void efx_schedule_reset(struct efx_nic *efx, enum reset_type type);
192int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs,
193 unsigned int rx_usecs, bool rx_adaptive,
194 bool rx_may_override_tx);
195void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs,
196 unsigned int *rx_usecs, bool *rx_adaptive);
197
198/* Dummy PHY ops for PHY drivers */
199int efx_port_dummy_op_int(struct efx_nic *efx);
200void efx_port_dummy_op_void(struct efx_nic *efx);
201
202/* MTD */
203#ifdef CONFIG_SFC_MTD
204int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts,
205 size_t n_parts, size_t sizeof_part);
206static inline int efx_mtd_probe(struct efx_nic *efx)
207{
208 return efx->type->mtd_probe(efx);
209}
210void efx_mtd_rename(struct efx_nic *efx);
211void efx_mtd_remove(struct efx_nic *efx);
212#else
213static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; }
214static inline void efx_mtd_rename(struct efx_nic *efx) {}
215static inline void efx_mtd_remove(struct efx_nic *efx) {}
216#endif
217
218static inline void efx_schedule_channel(struct efx_channel *channel)
219{
220 netif_vdbg(channel->efx, intr, channel->efx->net_dev,
221 "channel %d scheduling NAPI poll on CPU%d\n",
222 channel->channel, raw_smp_processor_id());
223
224 napi_schedule(&channel->napi_str);
225}
226
227static inline void efx_schedule_channel_irq(struct efx_channel *channel)
228{
229 channel->event_test_cpu = raw_smp_processor_id();
230 efx_schedule_channel(channel);
231}
232
233void efx_link_status_changed(struct efx_nic *efx);
234void efx_link_set_advertising(struct efx_nic *efx, u32);
235void efx_link_set_wanted_fc(struct efx_nic *efx, u8);
236
237static inline void efx_device_detach_sync(struct efx_nic *efx)
238{
239 struct net_device *dev = efx->net_dev;
240
241 /* Lock/freeze all TX queues so that we can be sure the
242 * TX scheduler is stopped when we're done and before
243 * netif_device_present() becomes false.
244 */
245 netif_tx_lock_bh(dev);
246 netif_device_detach(dev);
247 netif_tx_unlock_bh(dev);
248}
249
250#endif /* EFX_EFX_H */