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d2912cb1 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
8ceee660 | 2 | /**************************************************************************** |
f7a6d2c4 | 3 | * Driver for Solarflare network controllers and boards |
8ceee660 | 4 | * Copyright 2005-2006 Fen Systems Ltd. |
f7a6d2c4 | 5 | * Copyright 2006-2013 Solarflare Communications Inc. |
8ceee660 BH |
6 | */ |
7 | ||
8 | #ifndef EFX_EFX_H | |
9 | #define EFX_EFX_H | |
10 | ||
51b35a45 | 11 | #include <linux/indirect_call_wrapper.h> |
8ceee660 | 12 | #include "net_driver.h" |
51b35a45 EC |
13 | #include "ef100_rx.h" |
14 | #include "ef100_tx.h" | |
84e7fc25 | 15 | #include "efx_common.h" |
64eebcfd | 16 | #include "filter.h" |
8ceee660 | 17 | |
e340be92 SS |
18 | int efx_net_open(struct net_device *net_dev); |
19 | int efx_net_stop(struct net_device *net_dev); | |
20 | ||
8ceee660 | 21 | /* TX */ |
00aef986 | 22 | void efx_init_tx_queue_core_txq(struct efx_tx_queue *tx_queue); |
00aef986 JP |
23 | netdev_tx_t efx_hard_start_xmit(struct sk_buff *skb, |
24 | struct net_device *net_dev); | |
51b35a45 EC |
25 | netdev_tx_t __efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb); |
26 | static inline netdev_tx_t efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb) | |
27 | { | |
28 | return INDIRECT_CALL_2(tx_queue->efx->type->tx_enqueue, | |
29 | ef100_enqueue_skb, __efx_enqueue_skb, | |
30 | tx_queue, skb); | |
31 | } | |
3b4f06c7 | 32 | void efx_xmit_done_single(struct efx_tx_queue *tx_queue); |
2572ac53 | 33 | int efx_setup_tc(struct net_device *net_dev, enum tc_setup_type type, |
de4784ca | 34 | void *type_data); |
183233be | 35 | extern unsigned int efx_piobuf_size; |
8ceee660 BH |
36 | |
37 | /* RX */ | |
00aef986 JP |
38 | void __efx_rx_packet(struct efx_channel *channel); |
39 | void efx_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index, | |
40 | unsigned int n_frags, unsigned int len, u16 flags); | |
ff734ef4 BH |
41 | static inline void efx_rx_flush_packet(struct efx_channel *channel) |
42 | { | |
85740cdf | 43 | if (channel->rx_pkt_n_frags) |
51b35a45 EC |
44 | INDIRECT_CALL_2(channel->efx->type->rx_packet, |
45 | __ef100_rx_packet, __efx_rx_packet, | |
46 | channel); | |
ff734ef4 | 47 | } |
06888543 EC |
48 | static inline bool efx_rx_buf_hash_valid(struct efx_nic *efx, const u8 *prefix) |
49 | { | |
50 | if (efx->type->rx_buf_hash_valid) | |
51 | return INDIRECT_CALL_1(efx->type->rx_buf_hash_valid, | |
52 | ef100_rx_buf_hash_valid, | |
53 | prefix); | |
54 | return true; | |
55 | } | |
ecc910f5 | 56 | |
7e6d06f0 BH |
57 | /* Maximum number of TCP segments we support for soft-TSO */ |
58 | #define EFX_TSO_MAX_SEGS 100 | |
59 | ||
60 | /* The smallest [rt]xq_entries that the driver supports. RX minimum | |
61 | * is a bit arbitrary. For TX, we must have space for at least 2 | |
62 | * TSO skbs. | |
63 | */ | |
64 | #define EFX_RXQ_MIN_ENT 128U | |
65 | #define EFX_TXQ_MIN_ENT(efx) (2 * efx_tx_max_skb_descs(efx)) | |
4642610c | 66 | |
a53d26eb BK |
67 | /* All EF10 architecture NICs steal one bit of the DMAQ size for various |
68 | * other purposes when counting TxQ entries, so we halve the queue size. | |
69 | */ | |
70 | #define EFX_TXQ_MAX_ENT(efx) (EFX_WORKAROUND_EF10(efx) ? \ | |
d9317aea BH |
71 | EFX_MAX_DMAQ_SIZE / 2 : EFX_MAX_DMAQ_SIZE) |
72 | ||
f1c2ef40 BK |
73 | static inline bool efx_rss_enabled(struct efx_nic *efx) |
74 | { | |
75 | return efx->rss_spread > 1; | |
76 | } | |
77 | ||
64eebcfd | 78 | /* Filters */ |
add72477 BH |
79 | |
80 | /** | |
81 | * efx_filter_insert_filter - add or replace a filter | |
82 | * @efx: NIC in which to insert the filter | |
83 | * @spec: Specification for the filter | |
84 | * @replace_equal: Flag for whether the specified filter may replace an | |
85 | * existing filter with equal priority | |
86 | * | |
87 | * On success, return the filter ID. | |
88 | * On failure, return a negative error code. | |
89 | * | |
b883d0bd BH |
90 | * If existing filters have equal match values to the new filter spec, |
91 | * then the new filter might replace them or the function might fail, | |
92 | * as follows. | |
93 | * | |
94 | * 1. If the existing filters have lower priority, or @replace_equal | |
95 | * is set and they have equal priority, replace them. | |
96 | * | |
97 | * 2. If the existing filters have higher priority, return -%EPERM. | |
98 | * | |
99 | * 3. If !efx_filter_is_mc_recipient(@spec), or the NIC does not | |
100 | * support delivery to multiple recipients, return -%EEXIST. | |
101 | * | |
102 | * This implies that filters for multiple multicast recipients must | |
103 | * all be inserted with the same priority and @replace_equal = %false. | |
add72477 BH |
104 | */ |
105 | static inline s32 efx_filter_insert_filter(struct efx_nic *efx, | |
106 | struct efx_filter_spec *spec, | |
107 | bool replace_equal) | |
108 | { | |
109 | return efx->type->filter_insert(efx, spec, replace_equal); | |
110 | } | |
111 | ||
112 | /** | |
113 | * efx_filter_remove_id_safe - remove a filter by ID, carefully | |
114 | * @efx: NIC from which to remove the filter | |
115 | * @priority: Priority of filter, as passed to @efx_filter_insert_filter | |
116 | * @filter_id: ID of filter, as returned by @efx_filter_insert_filter | |
117 | * | |
118 | * This function will range-check @filter_id, so it is safe to call | |
119 | * with a value passed from userland. | |
120 | */ | |
121 | static inline int efx_filter_remove_id_safe(struct efx_nic *efx, | |
122 | enum efx_filter_priority priority, | |
123 | u32 filter_id) | |
124 | { | |
125 | return efx->type->filter_remove_safe(efx, priority, filter_id); | |
126 | } | |
127 | ||
128 | /** | |
129 | * efx_filter_get_filter_safe - retrieve a filter by ID, carefully | |
130 | * @efx: NIC from which to remove the filter | |
131 | * @priority: Priority of filter, as passed to @efx_filter_insert_filter | |
132 | * @filter_id: ID of filter, as returned by @efx_filter_insert_filter | |
133 | * @spec: Buffer in which to store filter specification | |
134 | * | |
135 | * This function will range-check @filter_id, so it is safe to call | |
136 | * with a value passed from userland. | |
137 | */ | |
138 | static inline int | |
139 | efx_filter_get_filter_safe(struct efx_nic *efx, | |
140 | enum efx_filter_priority priority, | |
141 | u32 filter_id, struct efx_filter_spec *spec) | |
142 | { | |
143 | return efx->type->filter_get_safe(efx, priority, filter_id, spec); | |
144 | } | |
145 | ||
add72477 BH |
146 | static inline u32 efx_filter_count_rx_used(struct efx_nic *efx, |
147 | enum efx_filter_priority priority) | |
148 | { | |
149 | return efx->type->filter_count_rx_used(efx, priority); | |
150 | } | |
151 | static inline u32 efx_filter_get_rx_id_limit(struct efx_nic *efx) | |
152 | { | |
153 | return efx->type->filter_get_rx_id_limit(efx); | |
154 | } | |
155 | static inline s32 efx_filter_get_rx_ids(struct efx_nic *efx, | |
156 | enum efx_filter_priority priority, | |
157 | u32 *buf, u32 size) | |
158 | { | |
159 | return efx->type->filter_get_rx_ids(efx, priority, buf, size); | |
160 | } | |
f8d62037 | 161 | |
42356d9a | 162 | /* RSS contexts */ |
42356d9a EC |
163 | static inline bool efx_rss_active(struct efx_rss_context *ctx) |
164 | { | |
f7226e0f | 165 | return ctx->context_id != EFX_MCDI_RSS_CONTEXT_INVALID; |
42356d9a EC |
166 | } |
167 | ||
f5e7adc3 | 168 | /* Ethtool support */ |
f5e7adc3 BH |
169 | extern const struct ethtool_ops efx_ethtool_ops; |
170 | ||
8ceee660 | 171 | /* Global */ |
539de7c5 BK |
172 | unsigned int efx_usecs_to_ticks(struct efx_nic *efx, unsigned int usecs); |
173 | unsigned int efx_ticks_to_usecs(struct efx_nic *efx, unsigned int ticks); | |
00aef986 JP |
174 | int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs, |
175 | unsigned int rx_usecs, bool rx_adaptive, | |
176 | bool rx_may_override_tx); | |
177 | void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs, | |
178 | unsigned int *rx_usecs, bool *rx_adaptive); | |
8ceee660 | 179 | |
e4d112e4 EC |
180 | /* Update the generic software stats in the passed stats array */ |
181 | void efx_update_sw_stats(struct efx_nic *efx, u64 *stats); | |
182 | ||
f4150724 BH |
183 | /* MTD */ |
184 | #ifdef CONFIG_SFC_MTD | |
00aef986 JP |
185 | int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts, |
186 | size_t n_parts, size_t sizeof_part); | |
45a3fd55 BH |
187 | static inline int efx_mtd_probe(struct efx_nic *efx) |
188 | { | |
189 | return efx->type->mtd_probe(efx); | |
190 | } | |
00aef986 JP |
191 | void efx_mtd_rename(struct efx_nic *efx); |
192 | void efx_mtd_remove(struct efx_nic *efx); | |
f4150724 BH |
193 | #else |
194 | static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; } | |
195 | static inline void efx_mtd_rename(struct efx_nic *efx) {} | |
196 | static inline void efx_mtd_remove(struct efx_nic *efx) {} | |
197 | #endif | |
8ceee660 | 198 | |
7fa8d547 SS |
199 | #ifdef CONFIG_SFC_SRIOV |
200 | static inline unsigned int efx_vf_size(struct efx_nic *efx) | |
201 | { | |
202 | return 1 << efx->vi_scale; | |
203 | } | |
204 | #endif | |
205 | ||
c2f3b8e3 DP |
206 | static inline void efx_device_detach_sync(struct efx_nic *efx) |
207 | { | |
208 | struct net_device *dev = efx->net_dev; | |
209 | ||
84e7fc25 EC |
210 | /* We must stop reps (which use our TX) before we stop ourselves. */ |
211 | efx_detach_reps(efx); | |
212 | ||
c2f3b8e3 DP |
213 | /* Lock/freeze all TX queues so that we can be sure the |
214 | * TX scheduler is stopped when we're done and before | |
215 | * netif_device_present() becomes false. | |
216 | */ | |
35205b21 | 217 | netif_tx_lock_bh(dev); |
c2f3b8e3 | 218 | netif_device_detach(dev); |
35205b21 | 219 | netif_tx_unlock_bh(dev); |
c2f3b8e3 DP |
220 | } |
221 | ||
9c568fd8 PD |
222 | static inline void efx_device_attach_if_not_resetting(struct efx_nic *efx) |
223 | { | |
84e7fc25 | 224 | if ((efx->state != STATE_DISABLED) && !efx->reset_pending) { |
9c568fd8 | 225 | netif_device_attach(efx->net_dev); |
84e7fc25 EC |
226 | if (efx->state == STATE_NET_UP) |
227 | efx_attach_reps(efx); | |
228 | } | |
9c568fd8 PD |
229 | } |
230 | ||
dd98708c EC |
231 | static inline bool efx_rwsem_assert_write_locked(struct rw_semaphore *sem) |
232 | { | |
233 | if (WARN_ON(down_read_trylock(sem))) { | |
234 | up_read(sem); | |
235 | return false; | |
236 | } | |
237 | return true; | |
238 | } | |
239 | ||
dfe44c1f CM |
240 | int efx_xdp_tx_buffers(struct efx_nic *efx, int n, struct xdp_frame **xdpfs, |
241 | bool flush); | |
242 | ||
8ceee660 | 243 | #endif /* EFX_EFX_H */ |