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Merge remote-tracking branch 'regulator/for-next'
[deliverable/linux.git] / drivers / net / ethernet / sfc / efx.h
CommitLineData
8ceee660 1/****************************************************************************
f7a6d2c4 2 * Driver for Solarflare network controllers and boards
8ceee660 3 * Copyright 2005-2006 Fen Systems Ltd.
f7a6d2c4 4 * Copyright 2006-2013 Solarflare Communications Inc.
8ceee660
BH		 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"
64eebcfd 15#include "filter.h"
8ceee660 16
6a350fdb 17/* All controllers use BAR 0 for I/O space and BAR 2(&3) for memory */
02246a7f 18/* All VFs use BAR 0/1 for memory */
dc803df8 19#define EFX_MEM_BAR 2
02246a7f 20#define EFX_MEM_VF_BAR 0
dc803df8 21
e340be92
SS		 22int efx_net_open(struct net_device *net_dev);
23int efx_net_stop(struct net_device *net_dev);
24
8ceee660 25/* TX */
00aef986
JP		 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);
16e5cc64
JF		 35int efx_setup_tc(struct net_device *net_dev, u32 handle, __be16 proto,
36 struct tc_to_netdev *tc);
00aef986 37unsigned int efx_tx_max_skb_descs(struct efx_nic *efx);
183233be 38extern unsigned int efx_piobuf_size;
b0fbdae1 39extern bool efx_separate_tx_channels;
8ceee660
BH		 40
41/* RX */
267c0157 42void efx_set_default_rx_indir_table(struct efx_nic *efx);
00aef986
JP		 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);
cce28794 48void efx_fast_push_rx_descriptors(struct efx_rx_queue *rx_queue, bool atomic);
00aef986
JP		 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);
ff734ef4
BH		 53static inline void efx_rx_flush_packet(struct efx_channel *channel)
54{
85740cdf
BH		 55 if (channel->rx_pkt_n_frags)
56 __efx_rx_packet(channel);
ff734ef4 57}
00aef986 58void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
ecc910f5
SH		 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
8ceee660 66
7e6d06f0
BH		 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))
4642610c 76
d9317aea
BH		 77#define EFX_TXQ_MAX_ENT(efx) (EFX_WORKAROUND_35388(efx) ? \
78 EFX_MAX_DMAQ_SIZE / 2 : EFX_MAX_DMAQ_SIZE)
79
f1c2ef40
BK		 80static inline bool efx_rss_enabled(struct efx_nic *efx)
81{
82 return efx->rss_spread > 1;
83}
84
64eebcfd 85/* Filters */
add72477 86
0d322413
EC		 87void efx_mac_reconfigure(struct efx_nic *efx);
88
add72477
BH		 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 *
b883d0bd
BH		 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.
add72477
BH		 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
add72477
BH		 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}
64d8ad6d 170#ifdef CONFIG_RFS_ACCEL
00aef986
JP		 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);
64d8ad6d
BH		 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
00aef986 185bool efx_filter_is_mc_recipient(const struct efx_filter_spec *spec);
64eebcfd 186
8ceee660 187/* Channels */
00aef986
JP		 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);
8ceee660
BH		 191
192/* Ports */
00aef986
JP		 193int efx_reconfigure_port(struct efx_nic *efx);
194int __efx_reconfigure_port(struct efx_nic *efx);
8c8661e4 195
f5e7adc3 196/* Ethtool support */
f5e7adc3
BH		 197extern const struct ethtool_ops efx_ethtool_ops;
198
8c8661e4 199/* Reset handling */
00aef986
JP		 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);
8ceee660
BH		 204
205/* Global */
00aef986 206void efx_schedule_reset(struct efx_nic *efx, enum reset_type type);
539de7c5
BK		 207unsigned int efx_usecs_to_ticks(struct efx_nic *efx, unsigned int usecs);
208unsigned int efx_ticks_to_usecs(struct efx_nic *efx, unsigned int ticks);
00aef986
JP		 209int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs,
210 unsigned int rx_usecs, bool rx_adaptive,
211 bool rx_may_override_tx);
212void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs,
213 unsigned int *rx_usecs, bool *rx_adaptive);
36763266
AR		 214void efx_stop_eventq(struct efx_channel *channel);
215void efx_start_eventq(struct efx_channel *channel);
8ceee660
BH		 216
217/* Dummy PHY ops for PHY drivers */
00aef986
JP		 218int efx_port_dummy_op_int(struct efx_nic *efx);
219void efx_port_dummy_op_void(struct efx_nic *efx);
8ceee660 220
e4d112e4
EC		 221/* Update the generic software stats in the passed stats array */
222void efx_update_sw_stats(struct efx_nic *efx, u64 *stats);
223
f4150724
BH		 224/* MTD */
225#ifdef CONFIG_SFC_MTD
00aef986
JP		 226int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts,
227 size_t n_parts, size_t sizeof_part);
45a3fd55
BH		 228static inline int efx_mtd_probe(struct efx_nic *efx)
229{
230 return efx->type->mtd_probe(efx);
231}
00aef986
JP		 232void efx_mtd_rename(struct efx_nic *efx);
233void efx_mtd_remove(struct efx_nic *efx);
f4150724
BH		 234#else
235static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; }
236static inline void efx_mtd_rename(struct efx_nic *efx) {}
237static inline void efx_mtd_remove(struct efx_nic *efx) {}
238#endif
8ceee660 239
7fa8d547
SS		 240#ifdef CONFIG_SFC_SRIOV
241static inline unsigned int efx_vf_size(struct efx_nic *efx)
242{
243 return 1 << efx->vi_scale;
244}
245#endif
246
8ceee660
BH		 247static inline void efx_schedule_channel(struct efx_channel *channel)
248{
62776d03
BH		 249 netif_vdbg(channel->efx, intr, channel->efx->net_dev,
250 "channel %d scheduling NAPI poll on CPU%d\n",
251 channel->channel, raw_smp_processor_id());
8ceee660 252
288379f0 253 napi_schedule(&channel->napi_str);
8ceee660
BH		 254}
255
1646a6f3
BH		 256static inline void efx_schedule_channel_irq(struct efx_channel *channel)
257{
dd40781e 258 channel->event_test_cpu = raw_smp_processor_id();
1646a6f3
BH		 259 efx_schedule_channel(channel);
260}
261
00aef986
JP		 262void efx_link_status_changed(struct efx_nic *efx);
263void efx_link_set_advertising(struct efx_nic *efx, u32);
264void efx_link_set_wanted_fc(struct efx_nic *efx, u8);
fdaa9aed 265
c2f3b8e3
DP		 266static inline void efx_device_detach_sync(struct efx_nic *efx)
267{
268 struct net_device *dev = efx->net_dev;
269
270 /* Lock/freeze all TX queues so that we can be sure the
271 * TX scheduler is stopped when we're done and before
272 * netif_device_present() becomes false.
273 */
35205b21 274 netif_tx_lock_bh(dev);
c2f3b8e3 275 netif_device_detach(dev);
35205b21 276 netif_tx_unlock_bh(dev);
c2f3b8e3
DP		 277}
278
dd98708c
EC		 279static inline bool efx_rwsem_assert_write_locked(struct rw_semaphore *sem)
280{
281 if (WARN_ON(down_read_trylock(sem))) {
282 up_read(sem);
283 return false;
284 }
285 return true;
286}
287
8ceee660 288#endif /* EFX_EFX_H */
Linux kernel - Deliverables
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