1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
2 | /**************************************************************************** |
3 | * Driver for Solarflare network controllers and boards |
4 | * Copyright 2005-2006 Fen Systems Ltd. |
5 | * Copyright 2006-2013 Solarflare Communications Inc. |
6 | */ |
7 | |
8 | #ifndef EFX_EFX_H |
9 | #define EFX_EFX_H |
10 | |
11 | #include <linux/indirect_call_wrapper.h> |
12 | #include "net_driver.h" |
13 | #include "filter.h" |
14 | |
15 | /* TX */ |
16 | void efx_siena_init_tx_queue_core_txq(struct efx_tx_queue *tx_queue); |
17 | netdev_tx_t efx_siena_hard_start_xmit(struct sk_buff *skb, |
18 | struct net_device *net_dev); |
19 | netdev_tx_t __efx_siena_enqueue_skb(struct efx_tx_queue *tx_queue, |
20 | struct sk_buff *skb); |
21 | static inline netdev_tx_t efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb) |
22 | { |
23 | return INDIRECT_CALL_1(tx_queue->efx->type->tx_enqueue, |
24 | __efx_siena_enqueue_skb, tx_queue, skb); |
25 | } |
26 | int efx_siena_setup_tc(struct net_device *net_dev, enum tc_setup_type type, |
27 | void *type_data); |
28 | |
29 | /* RX */ |
30 | void __efx_siena_rx_packet(struct efx_channel *channel); |
31 | void efx_siena_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index, |
32 | unsigned int n_frags, unsigned int len, u16 flags); |
33 | static inline void efx_rx_flush_packet(struct efx_channel *channel) |
34 | { |
35 | if (channel->rx_pkt_n_frags) |
36 | __efx_siena_rx_packet(channel); |
37 | } |
38 | |
39 | /* Maximum number of TCP segments we support for soft-TSO */ |
40 | #define EFX_TSO_MAX_SEGS 100 |
41 | |
42 | /* The smallest [rt]xq_entries that the driver supports. RX minimum |
43 | * is a bit arbitrary. For TX, we must have space for at least 2 |
44 | * TSO skbs. |
45 | */ |
46 | #define EFX_RXQ_MIN_ENT 128U |
47 | #define EFX_TXQ_MIN_ENT(efx) (2 * efx_siena_tx_max_skb_descs(efx)) |
48 | |
49 | /* All EF10 architecture NICs steal one bit of the DMAQ size for various |
50 | * other purposes when counting TxQ entries, so we halve the queue size. |
51 | */ |
52 | #define EFX_TXQ_MAX_ENT(efx) (EFX_WORKAROUND_EF10(efx) ? \ |
53 | EFX_MAX_DMAQ_SIZE / 2 : EFX_MAX_DMAQ_SIZE) |
54 | |
55 | static inline bool (struct efx_nic *efx) |
56 | { |
57 | return efx->rss_spread > 1; |
58 | } |
59 | |
60 | /* Filters */ |
61 | |
62 | /** |
63 | * efx_filter_insert_filter - add or replace a filter |
64 | * @efx: NIC in which to insert the filter |
65 | * @spec: Specification for the filter |
66 | * @replace_equal: Flag for whether the specified filter may replace an |
67 | * existing filter with equal priority |
68 | * |
69 | * On success, return the filter ID. |
70 | * On failure, return a negative error code. |
71 | * |
72 | * If existing filters have equal match values to the new filter spec, |
73 | * then the new filter might replace them or the function might fail, |
74 | * as follows. |
75 | * |
76 | * 1. If the existing filters have lower priority, or @replace_equal |
77 | * is set and they have equal priority, replace them. |
78 | * |
79 | * 2. If the existing filters have higher priority, return -%EPERM. |
80 | * |
81 | * 3. If !efx_siena_filter_is_mc_recipient(@spec), or the NIC does not |
82 | * support delivery to multiple recipients, return -%EEXIST. |
83 | * |
84 | * This implies that filters for multiple multicast recipients must |
85 | * all be inserted with the same priority and @replace_equal = %false. |
86 | */ |
87 | static inline s32 efx_filter_insert_filter(struct efx_nic *efx, |
88 | struct efx_filter_spec *spec, |
89 | bool replace_equal) |
90 | { |
91 | return efx->type->filter_insert(efx, spec, replace_equal); |
92 | } |
93 | |
94 | /** |
95 | * efx_filter_remove_id_safe - remove a filter by ID, carefully |
96 | * @efx: NIC from which to remove the filter |
97 | * @priority: Priority of filter, as passed to @efx_filter_insert_filter |
98 | * @filter_id: ID of filter, as returned by @efx_filter_insert_filter |
99 | * |
100 | * This function will range-check @filter_id, so it is safe to call |
101 | * with a value passed from userland. |
102 | */ |
103 | static inline int efx_filter_remove_id_safe(struct efx_nic *efx, |
104 | enum efx_filter_priority priority, |
105 | u32 filter_id) |
106 | { |
107 | return efx->type->filter_remove_safe(efx, priority, filter_id); |
108 | } |
109 | |
110 | /** |
111 | * efx_filter_get_filter_safe - retrieve a filter by ID, carefully |
112 | * @efx: NIC from which to remove the filter |
113 | * @priority: Priority of filter, as passed to @efx_filter_insert_filter |
114 | * @filter_id: ID of filter, as returned by @efx_filter_insert_filter |
115 | * @spec: Buffer in which to store filter specification |
116 | * |
117 | * This function will range-check @filter_id, so it is safe to call |
118 | * with a value passed from userland. |
119 | */ |
120 | static inline int |
121 | efx_filter_get_filter_safe(struct efx_nic *efx, |
122 | enum efx_filter_priority priority, |
123 | u32 filter_id, struct efx_filter_spec *spec) |
124 | { |
125 | return efx->type->filter_get_safe(efx, priority, filter_id, spec); |
126 | } |
127 | |
128 | static inline u32 efx_filter_count_rx_used(struct efx_nic *efx, |
129 | enum efx_filter_priority priority) |
130 | { |
131 | return efx->type->filter_count_rx_used(efx, priority); |
132 | } |
133 | static inline u32 efx_filter_get_rx_id_limit(struct efx_nic *efx) |
134 | { |
135 | return efx->type->filter_get_rx_id_limit(efx); |
136 | } |
137 | static inline s32 efx_filter_get_rx_ids(struct efx_nic *efx, |
138 | enum efx_filter_priority priority, |
139 | u32 *buf, u32 size) |
140 | { |
141 | return efx->type->filter_get_rx_ids(efx, priority, buf, size); |
142 | } |
143 | |
144 | /* RSS contexts */ |
145 | static inline bool (struct efx_rss_context *ctx) |
146 | { |
147 | return ctx->context_id != EFX_MCDI_RSS_CONTEXT_INVALID; |
148 | } |
149 | |
150 | /* Ethtool support */ |
151 | extern const struct ethtool_ops efx_siena_ethtool_ops; |
152 | |
153 | /* Global */ |
154 | unsigned int efx_siena_usecs_to_ticks(struct efx_nic *efx, unsigned int usecs); |
155 | int efx_siena_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs, |
156 | unsigned int rx_usecs, bool rx_adaptive, |
157 | bool rx_may_override_tx); |
158 | void efx_siena_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs, |
159 | unsigned int *rx_usecs, bool *rx_adaptive); |
160 | |
161 | /* Update the generic software stats in the passed stats array */ |
162 | void efx_siena_update_sw_stats(struct efx_nic *efx, u64 *stats); |
163 | |
164 | /* MTD */ |
165 | #ifdef CONFIG_SFC_SIENA_MTD |
166 | int efx_siena_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts, |
167 | size_t n_parts, size_t sizeof_part); |
168 | static inline int efx_mtd_probe(struct efx_nic *efx) |
169 | { |
170 | return efx->type->mtd_probe(efx); |
171 | } |
172 | void efx_siena_mtd_rename(struct efx_nic *efx); |
173 | void efx_siena_mtd_remove(struct efx_nic *efx); |
174 | #else |
175 | static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; } |
176 | static inline void efx_siena_mtd_rename(struct efx_nic *efx) {} |
177 | static inline void efx_siena_mtd_remove(struct efx_nic *efx) {} |
178 | #endif |
179 | |
180 | #ifdef CONFIG_SFC_SIENA_SRIOV |
181 | static inline unsigned int efx_vf_size(struct efx_nic *efx) |
182 | { |
183 | return 1 << efx->vi_scale; |
184 | } |
185 | #endif |
186 | |
187 | static inline void efx_device_detach_sync(struct efx_nic *efx) |
188 | { |
189 | struct net_device *dev = efx->net_dev; |
190 | |
191 | /* Lock/freeze all TX queues so that we can be sure the |
192 | * TX scheduler is stopped when we're done and before |
193 | * netif_device_present() becomes false. |
194 | */ |
195 | netif_tx_lock_bh(dev); |
196 | netif_device_detach(dev); |
197 | netif_tx_unlock_bh(dev); |
198 | } |
199 | |
200 | static inline void efx_device_attach_if_not_resetting(struct efx_nic *efx) |
201 | { |
202 | if ((efx->state != STATE_DISABLED) && !efx->reset_pending) |
203 | netif_device_attach(dev: efx->net_dev); |
204 | } |
205 | |
206 | static inline bool efx_rwsem_assert_write_locked(struct rw_semaphore *sem) |
207 | { |
208 | if (WARN_ON(down_read_trylock(sem))) { |
209 | up_read(sem); |
210 | return false; |
211 | } |
212 | return true; |
213 | } |
214 | |
215 | int efx_siena_xdp_tx_buffers(struct efx_nic *efx, int n, |
216 | struct xdp_frame **xdpfs, bool flush); |
217 | |
218 | #endif /* EFX_EFX_H */ |
219 | |