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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/* All VFs use BAR 0/1 for memory */
19#define EFX_MEM_BAR 2
20#define EFX_MEM_VF_BAR 0
21
22int efx_net_open(struct net_device *net_dev);
23int efx_net_stop(struct net_device *net_dev);
24
25/* TX */
26int efx_probe_tx_queue(struct efx_tx_queue *tx_queue);
27void efx_remove_tx_queue(struct efx_tx_queue *tx_queue);
28void efx_init_tx_queue(struct efx_tx_queue *tx_queue);
29void efx_init_tx_queue_core_txq(struct efx_tx_queue *tx_queue);
30void efx_fini_tx_queue(struct efx_tx_queue *tx_queue);
31netdev_tx_t efx_hard_start_xmit(struct sk_buff *skb,
32 struct net_device *net_dev);
33netdev_tx_t efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb);
34void efx_xmit_done(struct efx_tx_queue *tx_queue, unsigned int index);
35int efx_setup_tc(struct net_device *net_dev, u32 handle, __be16 proto,
36 struct tc_to_netdev *tc);
37unsigned int efx_tx_max_skb_descs(struct efx_nic *efx);
38extern unsigned int efx_piobuf_size;
39extern bool efx_separate_tx_channels;
40
41/* RX */
42void efx_set_default_rx_indir_table(struct efx_nic *efx);
43void efx_rx_config_page_split(struct efx_nic *efx);
44int efx_probe_rx_queue(struct efx_rx_queue *rx_queue);
45void efx_remove_rx_queue(struct efx_rx_queue *rx_queue);
46void efx_init_rx_queue(struct efx_rx_queue *rx_queue);
47void efx_fini_rx_queue(struct efx_rx_queue *rx_queue);
48void efx_fast_push_rx_descriptors(struct efx_rx_queue *rx_queue, bool atomic);
49void efx_rx_slow_fill(unsigned long context);
50void __efx_rx_packet(struct efx_channel *channel);
51void efx_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index,
52 unsigned int n_frags, unsigned int len, u16 flags);
53static inline void efx_rx_flush_packet(struct efx_channel *channel)
54{
55 if (channel->rx_pkt_n_frags)
56 __efx_rx_packet(channel);
57}
58void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
59
60#define EFX_MAX_DMAQ_SIZE 4096UL
61#define EFX_DEFAULT_DMAQ_SIZE 1024UL
62#define EFX_MIN_DMAQ_SIZE 512UL
63
64#define EFX_MAX_EVQ_SIZE 16384UL
65#define EFX_MIN_EVQ_SIZE 512UL
66
67/* Maximum number of TCP segments we support for soft-TSO */
68#define EFX_TSO_MAX_SEGS 100
69
70/* The smallest [rt]xq_entries that the driver supports. RX minimum
71 * is a bit arbitrary. For TX, we must have space for at least 2
72 * TSO skbs.
73 */
74#define EFX_RXQ_MIN_ENT 128U
75#define EFX_TXQ_MIN_ENT(efx) (2 * efx_tx_max_skb_descs(efx))
76
77#define EFX_TXQ_MAX_ENT(efx) (EFX_WORKAROUND_35388(efx) ? \
78 EFX_MAX_DMAQ_SIZE / 2 : EFX_MAX_DMAQ_SIZE)
79
80static inline bool efx_rss_enabled(struct efx_nic *efx)
81{
82 return efx->rss_spread > 1;
83}
84
85/* Filters */
86
87void efx_mac_reconfigure(struct efx_nic *efx);
88
89/**
90 * efx_filter_insert_filter - add or replace a filter
91 * @efx: NIC in which to insert the filter
92 * @spec: Specification for the filter
93 * @replace_equal: Flag for whether the specified filter may replace an
94 * existing filter with equal priority
95 *
96 * On success, return the filter ID.
97 * On failure, return a negative error code.
98 *
99 * If existing filters have equal match values to the new filter spec,
100 * then the new filter might replace them or the function might fail,
101 * as follows.
102 *
103 * 1. If the existing filters have lower priority, or @replace_equal
104 * is set and they have equal priority, replace them.
105 *
106 * 2. If the existing filters have higher priority, return -%EPERM.
107 *
108 * 3. If !efx_filter_is_mc_recipient(@spec), or the NIC does not
109 * support delivery to multiple recipients, return -%EEXIST.
110 *
111 * This implies that filters for multiple multicast recipients must
112 * all be inserted with the same priority and @replace_equal = %false.
113 */
114static inline s32 efx_filter_insert_filter(struct efx_nic *efx,
115 struct efx_filter_spec *spec,
116 bool replace_equal)
117{
118 return efx->type->filter_insert(efx, spec, replace_equal);
119}
120
121/**
122 * efx_filter_remove_id_safe - remove a filter by ID, carefully
123 * @efx: NIC from which to remove the filter
124 * @priority: Priority of filter, as passed to @efx_filter_insert_filter
125 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter
126 *
127 * This function will range-check @filter_id, so it is safe to call
128 * with a value passed from userland.
129 */
130static inline int efx_filter_remove_id_safe(struct efx_nic *efx,
131 enum efx_filter_priority priority,
132 u32 filter_id)
133{
134 return efx->type->filter_remove_safe(efx, priority, filter_id);
135}
136
137/**
138 * efx_filter_get_filter_safe - retrieve a filter by ID, carefully
139 * @efx: NIC from which to remove the filter
140 * @priority: Priority of filter, as passed to @efx_filter_insert_filter
141 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter
142 * @spec: Buffer in which to store filter specification
143 *
144 * This function will range-check @filter_id, so it is safe to call
145 * with a value passed from userland.
146 */
147static inline int
148efx_filter_get_filter_safe(struct efx_nic *efx,
149 enum efx_filter_priority priority,
150 u32 filter_id, struct efx_filter_spec *spec)
151{
152 return efx->type->filter_get_safe(efx, priority, filter_id, spec);
153}
154
155static inline u32 efx_filter_count_rx_used(struct efx_nic *efx,
156 enum efx_filter_priority priority)
157{
158 return efx->type->filter_count_rx_used(efx, priority);
159}
160static inline u32 efx_filter_get_rx_id_limit(struct efx_nic *efx)
161{
162 return efx->type->filter_get_rx_id_limit(efx);
163}
164static inline s32 efx_filter_get_rx_ids(struct efx_nic *efx,
165 enum efx_filter_priority priority,
166 u32 *buf, u32 size)
167{
168 return efx->type->filter_get_rx_ids(efx, priority, buf, size);
169}
170#ifdef CONFIG_RFS_ACCEL
171int efx_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb,
172 u16 rxq_index, u32 flow_id);
173bool __efx_filter_rfs_expire(struct efx_nic *efx, unsigned quota);
174static inline void efx_filter_rfs_expire(struct efx_channel *channel)
175{
176 if (channel->rfs_filters_added >= 60 &&
177 __efx_filter_rfs_expire(channel->efx, 100))
178 channel->rfs_filters_added -= 60;
179}
180#define efx_filter_rfs_enabled() 1
181#else
182static inline void efx_filter_rfs_expire(struct efx_channel *channel) {}
183#define efx_filter_rfs_enabled() 0
184#endif
185bool efx_filter_is_mc_recipient(const struct efx_filter_spec *spec);
186
187/* Channels */
188int efx_channel_dummy_op_int(struct efx_channel *channel);
189void efx_channel_dummy_op_void(struct efx_channel *channel);
190int efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries);
191
192/* Ports */
193int efx_reconfigure_port(struct efx_nic *efx);
194int __efx_reconfigure_port(struct efx_nic *efx);
195
196/* Ethtool support */
197extern const struct ethtool_ops efx_ethtool_ops;
198
199/* Reset handling */
200int efx_reset(struct efx_nic *efx, enum reset_type method);
201void efx_reset_down(struct efx_nic *efx, enum reset_type method);
202int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok);
203int efx_try_recovery(struct efx_nic *efx);
204
205/* Global */
206void efx_schedule_reset(struct efx_nic *efx, enum reset_type type);
207int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs,
208 unsigned int rx_usecs, bool rx_adaptive,
209 bool rx_may_override_tx);
210void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs,
211 unsigned int *rx_usecs, bool *rx_adaptive);
212void efx_stop_eventq(struct efx_channel *channel);
213void efx_start_eventq(struct efx_channel *channel);
214
215/* Dummy PHY ops for PHY drivers */
216int efx_port_dummy_op_int(struct efx_nic *efx);
217void efx_port_dummy_op_void(struct efx_nic *efx);
218
219/* Update the generic software stats in the passed stats array */
220void efx_update_sw_stats(struct efx_nic *efx, u64 *stats);
221
222/* MTD */
223#ifdef CONFIG_SFC_MTD
224int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts,
225 size_t n_parts, size_t sizeof_part);
226static inline int efx_mtd_probe(struct efx_nic *efx)
227{
228 return efx->type->mtd_probe(efx);
229}
230void efx_mtd_rename(struct efx_nic *efx);
231void efx_mtd_remove(struct efx_nic *efx);
232#else
233static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; }
234static inline void efx_mtd_rename(struct efx_nic *efx) {}
235static inline void efx_mtd_remove(struct efx_nic *efx) {}
236#endif
237
238#ifdef CONFIG_SFC_SRIOV
239static inline unsigned int efx_vf_size(struct efx_nic *efx)
240{
241 return 1 << efx->vi_scale;
242}
243#endif
244
245static inline void efx_schedule_channel(struct efx_channel *channel)
246{
247 netif_vdbg(channel->efx, intr, channel->efx->net_dev,
248 "channel %d scheduling NAPI poll on CPU%d\n",
249 channel->channel, raw_smp_processor_id());
250
251 napi_schedule(&channel->napi_str);
252}
253
254static inline void efx_schedule_channel_irq(struct efx_channel *channel)
255{
256 channel->event_test_cpu = raw_smp_processor_id();
257 efx_schedule_channel(channel);
258}
259
260void efx_link_status_changed(struct efx_nic *efx);
261void efx_link_set_advertising(struct efx_nic *efx, u32);
262void efx_link_set_wanted_fc(struct efx_nic *efx, u8);
263
264static inline void efx_device_detach_sync(struct efx_nic *efx)
265{
266 struct net_device *dev = efx->net_dev;
267
268 /* Lock/freeze all TX queues so that we can be sure the
269 * TX scheduler is stopped when we're done and before
270 * netif_device_present() becomes false.
271 */
272 netif_tx_lock_bh(dev);
273 netif_device_detach(dev);
274 netif_tx_unlock_bh(dev);
275}
276
277#endif /* EFX_EFX_H */