xref: /openbmc/linux/drivers/net/ethernet/sfc/falcon/efx.h (revision d2912cb1)
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 EF4_EFX_H
9 #define EF4_EFX_H
10 
11 #include "net_driver.h"
12 #include "filter.h"
13 
14 /* All controllers use BAR 0 for I/O space and BAR 2(&3) for memory */
15 /* All VFs use BAR 0/1 for memory */
16 #define EF4_MEM_BAR 2
17 #define EF4_MEM_VF_BAR 0
18 
19 int ef4_net_open(struct net_device *net_dev);
20 int ef4_net_stop(struct net_device *net_dev);
21 
22 /* TX */
23 int ef4_probe_tx_queue(struct ef4_tx_queue *tx_queue);
24 void ef4_remove_tx_queue(struct ef4_tx_queue *tx_queue);
25 void ef4_init_tx_queue(struct ef4_tx_queue *tx_queue);
26 void ef4_init_tx_queue_core_txq(struct ef4_tx_queue *tx_queue);
27 void ef4_fini_tx_queue(struct ef4_tx_queue *tx_queue);
28 netdev_tx_t ef4_hard_start_xmit(struct sk_buff *skb,
29 				struct net_device *net_dev);
30 netdev_tx_t ef4_enqueue_skb(struct ef4_tx_queue *tx_queue, struct sk_buff *skb);
31 void ef4_xmit_done(struct ef4_tx_queue *tx_queue, unsigned int index);
32 int ef4_setup_tc(struct net_device *net_dev, enum tc_setup_type type,
33 		 void *type_data);
34 unsigned int ef4_tx_max_skb_descs(struct ef4_nic *efx);
35 extern bool ef4_separate_tx_channels;
36 
37 /* RX */
38 void ef4_set_default_rx_indir_table(struct ef4_nic *efx);
39 void ef4_rx_config_page_split(struct ef4_nic *efx);
40 int ef4_probe_rx_queue(struct ef4_rx_queue *rx_queue);
41 void ef4_remove_rx_queue(struct ef4_rx_queue *rx_queue);
42 void ef4_init_rx_queue(struct ef4_rx_queue *rx_queue);
43 void ef4_fini_rx_queue(struct ef4_rx_queue *rx_queue);
44 void ef4_fast_push_rx_descriptors(struct ef4_rx_queue *rx_queue, bool atomic);
45 void ef4_rx_slow_fill(struct timer_list *t);
46 void __ef4_rx_packet(struct ef4_channel *channel);
47 void ef4_rx_packet(struct ef4_rx_queue *rx_queue, unsigned int index,
48 		   unsigned int n_frags, unsigned int len, u16 flags);
ef4_rx_flush_packet(struct ef4_channel * channel)49 static inline void ef4_rx_flush_packet(struct ef4_channel *channel)
50 {
51 	if (channel->rx_pkt_n_frags)
52 		__ef4_rx_packet(channel);
53 }
54 void ef4_schedule_slow_fill(struct ef4_rx_queue *rx_queue);
55 
56 #define EF4_MAX_DMAQ_SIZE 4096UL
57 #define EF4_DEFAULT_DMAQ_SIZE 1024UL
58 #define EF4_MIN_DMAQ_SIZE 512UL
59 
60 #define EF4_MAX_EVQ_SIZE 16384UL
61 #define EF4_MIN_EVQ_SIZE 512UL
62 
63 /* Maximum number of TCP segments we support for soft-TSO */
64 #define EF4_TSO_MAX_SEGS	100
65 
66 /* The smallest [rt]xq_entries that the driver supports.  RX minimum
67  * is a bit arbitrary.  For TX, we must have space for at least 2
68  * TSO skbs.
69  */
70 #define EF4_RXQ_MIN_ENT		128U
71 #define EF4_TXQ_MIN_ENT(efx)	(2 * ef4_tx_max_skb_descs(efx))
72 
ef4_rss_enabled(struct ef4_nic * efx)73 static inline bool ef4_rss_enabled(struct ef4_nic *efx)
74 {
75 	return efx->rss_spread > 1;
76 }
77 
78 /* Filters */
79 
80 void ef4_mac_reconfigure(struct ef4_nic *efx);
81 
82 /**
83  * ef4_filter_insert_filter - add or replace a filter
84  * @efx: NIC in which to insert the filter
85  * @spec: Specification for the filter
86  * @replace_equal: Flag for whether the specified filter may replace an
87  *	existing filter with equal priority
88  *
89  * On success, return the filter ID.
90  * On failure, return a negative error code.
91  *
92  * If existing filters have equal match values to the new filter spec,
93  * then the new filter might replace them or the function might fail,
94  * as follows.
95  *
96  * 1. If the existing filters have lower priority, or @replace_equal
97  *    is set and they have equal priority, replace them.
98  *
99  * 2. If the existing filters have higher priority, return -%EPERM.
100  *
101  * 3. If !ef4_filter_is_mc_recipient(@spec), or the NIC does not
102  *    support delivery to multiple recipients, return -%EEXIST.
103  *
104  * This implies that filters for multiple multicast recipients must
105  * all be inserted with the same priority and @replace_equal = %false.
106  */
ef4_filter_insert_filter(struct ef4_nic * efx,struct ef4_filter_spec * spec,bool replace_equal)107 static inline s32 ef4_filter_insert_filter(struct ef4_nic *efx,
108 					   struct ef4_filter_spec *spec,
109 					   bool replace_equal)
110 {
111 	return efx->type->filter_insert(efx, spec, replace_equal);
112 }
113 
114 /**
115  * ef4_filter_remove_id_safe - remove a filter by ID, carefully
116  * @efx: NIC from which to remove the filter
117  * @priority: Priority of filter, as passed to @ef4_filter_insert_filter
118  * @filter_id: ID of filter, as returned by @ef4_filter_insert_filter
119  *
120  * This function will range-check @filter_id, so it is safe to call
121  * with a value passed from userland.
122  */
ef4_filter_remove_id_safe(struct ef4_nic * efx,enum ef4_filter_priority priority,u32 filter_id)123 static inline int ef4_filter_remove_id_safe(struct ef4_nic *efx,
124 					    enum ef4_filter_priority priority,
125 					    u32 filter_id)
126 {
127 	return efx->type->filter_remove_safe(efx, priority, filter_id);
128 }
129 
130 /**
131  * ef4_filter_get_filter_safe - retrieve a filter by ID, carefully
132  * @efx: NIC from which to remove the filter
133  * @priority: Priority of filter, as passed to @ef4_filter_insert_filter
134  * @filter_id: ID of filter, as returned by @ef4_filter_insert_filter
135  * @spec: Buffer in which to store filter specification
136  *
137  * This function will range-check @filter_id, so it is safe to call
138  * with a value passed from userland.
139  */
140 static inline int
ef4_filter_get_filter_safe(struct ef4_nic * efx,enum ef4_filter_priority priority,u32 filter_id,struct ef4_filter_spec * spec)141 ef4_filter_get_filter_safe(struct ef4_nic *efx,
142 			   enum ef4_filter_priority priority,
143 			   u32 filter_id, struct ef4_filter_spec *spec)
144 {
145 	return efx->type->filter_get_safe(efx, priority, filter_id, spec);
146 }
147 
ef4_filter_count_rx_used(struct ef4_nic * efx,enum ef4_filter_priority priority)148 static inline u32 ef4_filter_count_rx_used(struct ef4_nic *efx,
149 					   enum ef4_filter_priority priority)
150 {
151 	return efx->type->filter_count_rx_used(efx, priority);
152 }
ef4_filter_get_rx_id_limit(struct ef4_nic * efx)153 static inline u32 ef4_filter_get_rx_id_limit(struct ef4_nic *efx)
154 {
155 	return efx->type->filter_get_rx_id_limit(efx);
156 }
ef4_filter_get_rx_ids(struct ef4_nic * efx,enum ef4_filter_priority priority,u32 * buf,u32 size)157 static inline s32 ef4_filter_get_rx_ids(struct ef4_nic *efx,
158 					enum ef4_filter_priority priority,
159 					u32 *buf, u32 size)
160 {
161 	return efx->type->filter_get_rx_ids(efx, priority, buf, size);
162 }
163 #ifdef CONFIG_RFS_ACCEL
164 int ef4_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb,
165 		   u16 rxq_index, u32 flow_id);
166 bool __ef4_filter_rfs_expire(struct ef4_nic *efx, unsigned quota);
ef4_filter_rfs_expire(struct ef4_channel * channel)167 static inline void ef4_filter_rfs_expire(struct ef4_channel *channel)
168 {
169 	if (channel->rfs_filters_added >= 60 &&
170 	    __ef4_filter_rfs_expire(channel->efx, 100))
171 		channel->rfs_filters_added -= 60;
172 }
173 #define ef4_filter_rfs_enabled() 1
174 #else
ef4_filter_rfs_expire(struct ef4_channel * channel)175 static inline void ef4_filter_rfs_expire(struct ef4_channel *channel) {}
176 #define ef4_filter_rfs_enabled() 0
177 #endif
178 bool ef4_filter_is_mc_recipient(const struct ef4_filter_spec *spec);
179 
180 /* Channels */
181 int ef4_channel_dummy_op_int(struct ef4_channel *channel);
182 void ef4_channel_dummy_op_void(struct ef4_channel *channel);
183 int ef4_realloc_channels(struct ef4_nic *efx, u32 rxq_entries, u32 txq_entries);
184 
185 /* Ports */
186 int ef4_reconfigure_port(struct ef4_nic *efx);
187 int __ef4_reconfigure_port(struct ef4_nic *efx);
188 
189 /* Ethtool support */
190 extern const struct ethtool_ops ef4_ethtool_ops;
191 
192 /* Reset handling */
193 int ef4_reset(struct ef4_nic *efx, enum reset_type method);
194 void ef4_reset_down(struct ef4_nic *efx, enum reset_type method);
195 int ef4_reset_up(struct ef4_nic *efx, enum reset_type method, bool ok);
196 int ef4_try_recovery(struct ef4_nic *efx);
197 
198 /* Global */
199 void ef4_schedule_reset(struct ef4_nic *efx, enum reset_type type);
200 unsigned int ef4_usecs_to_ticks(struct ef4_nic *efx, unsigned int usecs);
201 unsigned int ef4_ticks_to_usecs(struct ef4_nic *efx, unsigned int ticks);
202 int ef4_init_irq_moderation(struct ef4_nic *efx, unsigned int tx_usecs,
203 			    unsigned int rx_usecs, bool rx_adaptive,
204 			    bool rx_may_override_tx);
205 void ef4_get_irq_moderation(struct ef4_nic *efx, unsigned int *tx_usecs,
206 			    unsigned int *rx_usecs, bool *rx_adaptive);
207 void ef4_stop_eventq(struct ef4_channel *channel);
208 void ef4_start_eventq(struct ef4_channel *channel);
209 
210 /* Dummy PHY ops for PHY drivers */
211 int ef4_port_dummy_op_int(struct ef4_nic *efx);
212 void ef4_port_dummy_op_void(struct ef4_nic *efx);
213 
214 /* Update the generic software stats in the passed stats array */
215 void ef4_update_sw_stats(struct ef4_nic *efx, u64 *stats);
216 
217 /* MTD */
218 #ifdef CONFIG_SFC_FALCON_MTD
219 int ef4_mtd_add(struct ef4_nic *efx, struct ef4_mtd_partition *parts,
220 		size_t n_parts, size_t sizeof_part);
ef4_mtd_probe(struct ef4_nic * efx)221 static inline int ef4_mtd_probe(struct ef4_nic *efx)
222 {
223 	return efx->type->mtd_probe(efx);
224 }
225 void ef4_mtd_rename(struct ef4_nic *efx);
226 void ef4_mtd_remove(struct ef4_nic *efx);
227 #else
ef4_mtd_probe(struct ef4_nic * efx)228 static inline int ef4_mtd_probe(struct ef4_nic *efx) { return 0; }
ef4_mtd_rename(struct ef4_nic * efx)229 static inline void ef4_mtd_rename(struct ef4_nic *efx) {}
ef4_mtd_remove(struct ef4_nic * efx)230 static inline void ef4_mtd_remove(struct ef4_nic *efx) {}
231 #endif
232 
ef4_schedule_channel(struct ef4_channel * channel)233 static inline void ef4_schedule_channel(struct ef4_channel *channel)
234 {
235 	netif_vdbg(channel->efx, intr, channel->efx->net_dev,
236 		   "channel %d scheduling NAPI poll on CPU%d\n",
237 		   channel->channel, raw_smp_processor_id());
238 
239 	napi_schedule(&channel->napi_str);
240 }
241 
ef4_schedule_channel_irq(struct ef4_channel * channel)242 static inline void ef4_schedule_channel_irq(struct ef4_channel *channel)
243 {
244 	channel->event_test_cpu = raw_smp_processor_id();
245 	ef4_schedule_channel(channel);
246 }
247 
248 void ef4_link_status_changed(struct ef4_nic *efx);
249 void ef4_link_set_advertising(struct ef4_nic *efx, u32);
250 void ef4_link_set_wanted_fc(struct ef4_nic *efx, u8);
251 
ef4_device_detach_sync(struct ef4_nic * efx)252 static inline void ef4_device_detach_sync(struct ef4_nic *efx)
253 {
254 	struct net_device *dev = efx->net_dev;
255 
256 	/* Lock/freeze all TX queues so that we can be sure the
257 	 * TX scheduler is stopped when we're done and before
258 	 * netif_device_present() becomes false.
259 	 */
260 	netif_tx_lock_bh(dev);
261 	netif_device_detach(dev);
262 	netif_tx_unlock_bh(dev);
263 }
264 
ef4_rwsem_assert_write_locked(struct rw_semaphore * sem)265 static inline bool ef4_rwsem_assert_write_locked(struct rw_semaphore *sem)
266 {
267 	if (WARN_ON(down_read_trylock(sem))) {
268 		up_read(sem);
269 		return false;
270 	}
271 	return true;
272 }
273 
274 #endif /* EF4_EFX_H */
275