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 int efx_net_open(struct net_device *net_dev); 18 int efx_net_stop(struct net_device *net_dev); 19 20 /* TX */ 21 int efx_probe_tx_queue(struct efx_tx_queue *tx_queue); 22 void efx_remove_tx_queue(struct efx_tx_queue *tx_queue); 23 void efx_init_tx_queue(struct efx_tx_queue *tx_queue); 24 void efx_init_tx_queue_core_txq(struct efx_tx_queue *tx_queue); 25 void efx_fini_tx_queue(struct efx_tx_queue *tx_queue); 26 netdev_tx_t efx_hard_start_xmit(struct sk_buff *skb, 27 struct net_device *net_dev); 28 netdev_tx_t efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb); 29 void efx_xmit_done(struct efx_tx_queue *tx_queue, unsigned int index); 30 int efx_setup_tc(struct net_device *net_dev, enum tc_setup_type type, 31 void *type_data); 32 unsigned int efx_tx_max_skb_descs(struct efx_nic *efx); 33 extern unsigned int efx_piobuf_size; 34 extern bool efx_separate_tx_channels; 35 36 /* RX */ 37 void efx_set_default_rx_indir_table(struct efx_nic *efx, 38 struct efx_rss_context *ctx); 39 void efx_rx_config_page_split(struct efx_nic *efx); 40 int efx_probe_rx_queue(struct efx_rx_queue *rx_queue); 41 void efx_remove_rx_queue(struct efx_rx_queue *rx_queue); 42 void efx_init_rx_queue(struct efx_rx_queue *rx_queue); 43 void efx_fini_rx_queue(struct efx_rx_queue *rx_queue); 44 void efx_fast_push_rx_descriptors(struct efx_rx_queue *rx_queue, bool atomic); 45 void efx_rx_slow_fill(struct timer_list *t); 46 void __efx_rx_packet(struct efx_channel *channel); 47 void efx_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index, 48 unsigned int n_frags, unsigned int len, u16 flags); 49 static inline void efx_rx_flush_packet(struct efx_channel *channel) 50 { 51 if (channel->rx_pkt_n_frags) 52 __efx_rx_packet(channel); 53 } 54 void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue); 55 56 #define EFX_MAX_DMAQ_SIZE 4096UL 57 #define EFX_DEFAULT_DMAQ_SIZE 1024UL 58 #define EFX_MIN_DMAQ_SIZE 512UL 59 60 #define EFX_MAX_EVQ_SIZE 16384UL 61 #define EFX_MIN_EVQ_SIZE 512UL 62 63 /* Maximum number of TCP segments we support for soft-TSO */ 64 #define EFX_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 EFX_RXQ_MIN_ENT 128U 71 #define EFX_TXQ_MIN_ENT(efx) (2 * efx_tx_max_skb_descs(efx)) 72 73 /* All EF10 architecture NICs steal one bit of the DMAQ size for various 74 * other purposes when counting TxQ entries, so we halve the queue size. 75 */ 76 #define EFX_TXQ_MAX_ENT(efx) (EFX_WORKAROUND_EF10(efx) ? \ 77 EFX_MAX_DMAQ_SIZE / 2 : EFX_MAX_DMAQ_SIZE) 78 79 static inline bool efx_rss_enabled(struct efx_nic *efx) 80 { 81 return efx->rss_spread > 1; 82 } 83 84 /* Filters */ 85 86 void efx_mac_reconfigure(struct efx_nic *efx); 87 88 /** 89 * efx_filter_insert_filter - add or replace a filter 90 * @efx: NIC in which to insert the filter 91 * @spec: Specification for the filter 92 * @replace_equal: Flag for whether the specified filter may replace an 93 * existing filter with equal priority 94 * 95 * On success, return the filter ID. 96 * On failure, return a negative error code. 97 * 98 * If existing filters have equal match values to the new filter spec, 99 * then the new filter might replace them or the function might fail, 100 * as follows. 101 * 102 * 1. If the existing filters have lower priority, or @replace_equal 103 * is set and they have equal priority, replace them. 104 * 105 * 2. If the existing filters have higher priority, return -%EPERM. 106 * 107 * 3. If !efx_filter_is_mc_recipient(@spec), or the NIC does not 108 * support delivery to multiple recipients, return -%EEXIST. 109 * 110 * This implies that filters for multiple multicast recipients must 111 * all be inserted with the same priority and @replace_equal = %false. 112 */ 113 static inline s32 efx_filter_insert_filter(struct efx_nic *efx, 114 struct efx_filter_spec *spec, 115 bool replace_equal) 116 { 117 return efx->type->filter_insert(efx, spec, replace_equal); 118 } 119 120 /** 121 * efx_filter_remove_id_safe - remove a filter by ID, carefully 122 * @efx: NIC from which to remove the filter 123 * @priority: Priority of filter, as passed to @efx_filter_insert_filter 124 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter 125 * 126 * This function will range-check @filter_id, so it is safe to call 127 * with a value passed from userland. 128 */ 129 static inline int efx_filter_remove_id_safe(struct efx_nic *efx, 130 enum efx_filter_priority priority, 131 u32 filter_id) 132 { 133 return efx->type->filter_remove_safe(efx, priority, filter_id); 134 } 135 136 /** 137 * efx_filter_get_filter_safe - retrieve a filter by ID, carefully 138 * @efx: NIC from which to remove the filter 139 * @priority: Priority of filter, as passed to @efx_filter_insert_filter 140 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter 141 * @spec: Buffer in which to store filter specification 142 * 143 * This function will range-check @filter_id, so it is safe to call 144 * with a value passed from userland. 145 */ 146 static inline int 147 efx_filter_get_filter_safe(struct efx_nic *efx, 148 enum efx_filter_priority priority, 149 u32 filter_id, struct efx_filter_spec *spec) 150 { 151 return efx->type->filter_get_safe(efx, priority, filter_id, spec); 152 } 153 154 static inline u32 efx_filter_count_rx_used(struct efx_nic *efx, 155 enum efx_filter_priority priority) 156 { 157 return efx->type->filter_count_rx_used(efx, priority); 158 } 159 static inline u32 efx_filter_get_rx_id_limit(struct efx_nic *efx) 160 { 161 return efx->type->filter_get_rx_id_limit(efx); 162 } 163 static inline s32 efx_filter_get_rx_ids(struct efx_nic *efx, 164 enum efx_filter_priority priority, 165 u32 *buf, u32 size) 166 { 167 return efx->type->filter_get_rx_ids(efx, priority, buf, size); 168 } 169 #ifdef CONFIG_RFS_ACCEL 170 int efx_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb, 171 u16 rxq_index, u32 flow_id); 172 bool __efx_filter_rfs_expire(struct efx_nic *efx, unsigned quota); 173 static inline void efx_filter_rfs_expire(struct work_struct *data) 174 { 175 struct efx_channel *channel = container_of(data, struct efx_channel, 176 filter_work); 177 178 if (channel->rfs_filters_added >= 60 && 179 __efx_filter_rfs_expire(channel->efx, 100)) 180 channel->rfs_filters_added -= 60; 181 } 182 #define efx_filter_rfs_enabled() 1 183 #else 184 static inline void efx_filter_rfs_expire(struct work_struct *data) {} 185 #define efx_filter_rfs_enabled() 0 186 #endif 187 bool efx_filter_is_mc_recipient(const struct efx_filter_spec *spec); 188 189 bool efx_filter_spec_equal(const struct efx_filter_spec *left, 190 const struct efx_filter_spec *right); 191 u32 efx_filter_spec_hash(const struct efx_filter_spec *spec); 192 193 #ifdef CONFIG_RFS_ACCEL 194 bool efx_rps_check_rule(struct efx_arfs_rule *rule, unsigned int filter_idx, 195 bool *force); 196 197 struct efx_arfs_rule *efx_rps_hash_find(struct efx_nic *efx, 198 const struct efx_filter_spec *spec); 199 200 /* @new is written to indicate if entry was newly added (true) or if an old 201 * entry was found and returned (false). 202 */ 203 struct efx_arfs_rule *efx_rps_hash_add(struct efx_nic *efx, 204 const struct efx_filter_spec *spec, 205 bool *new); 206 207 void efx_rps_hash_del(struct efx_nic *efx, const struct efx_filter_spec *spec); 208 #endif 209 210 /* RSS contexts */ 211 struct efx_rss_context *efx_alloc_rss_context_entry(struct efx_nic *efx); 212 struct efx_rss_context *efx_find_rss_context_entry(struct efx_nic *efx, u32 id); 213 void efx_free_rss_context_entry(struct efx_rss_context *ctx); 214 static inline bool efx_rss_active(struct efx_rss_context *ctx) 215 { 216 return ctx->context_id != EFX_EF10_RSS_CONTEXT_INVALID; 217 } 218 219 /* Channels */ 220 int efx_channel_dummy_op_int(struct efx_channel *channel); 221 void efx_channel_dummy_op_void(struct efx_channel *channel); 222 int efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries); 223 224 /* Ports */ 225 int efx_reconfigure_port(struct efx_nic *efx); 226 int __efx_reconfigure_port(struct efx_nic *efx); 227 228 /* Ethtool support */ 229 extern const struct ethtool_ops efx_ethtool_ops; 230 231 /* Reset handling */ 232 int efx_reset(struct efx_nic *efx, enum reset_type method); 233 void efx_reset_down(struct efx_nic *efx, enum reset_type method); 234 int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok); 235 int efx_try_recovery(struct efx_nic *efx); 236 237 /* Global */ 238 void efx_schedule_reset(struct efx_nic *efx, enum reset_type type); 239 unsigned int efx_usecs_to_ticks(struct efx_nic *efx, unsigned int usecs); 240 unsigned int efx_ticks_to_usecs(struct efx_nic *efx, unsigned int ticks); 241 int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs, 242 unsigned int rx_usecs, bool rx_adaptive, 243 bool rx_may_override_tx); 244 void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs, 245 unsigned int *rx_usecs, bool *rx_adaptive); 246 void efx_stop_eventq(struct efx_channel *channel); 247 void efx_start_eventq(struct efx_channel *channel); 248 249 /* Dummy PHY ops for PHY drivers */ 250 int efx_port_dummy_op_int(struct efx_nic *efx); 251 void efx_port_dummy_op_void(struct efx_nic *efx); 252 253 /* Update the generic software stats in the passed stats array */ 254 void efx_update_sw_stats(struct efx_nic *efx, u64 *stats); 255 256 /* MTD */ 257 #ifdef CONFIG_SFC_MTD 258 int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts, 259 size_t n_parts, size_t sizeof_part); 260 static inline int efx_mtd_probe(struct efx_nic *efx) 261 { 262 return efx->type->mtd_probe(efx); 263 } 264 void efx_mtd_rename(struct efx_nic *efx); 265 void efx_mtd_remove(struct efx_nic *efx); 266 #else 267 static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; } 268 static inline void efx_mtd_rename(struct efx_nic *efx) {} 269 static inline void efx_mtd_remove(struct efx_nic *efx) {} 270 #endif 271 272 #ifdef CONFIG_SFC_SRIOV 273 static inline unsigned int efx_vf_size(struct efx_nic *efx) 274 { 275 return 1 << efx->vi_scale; 276 } 277 #endif 278 279 static inline void efx_schedule_channel(struct efx_channel *channel) 280 { 281 netif_vdbg(channel->efx, intr, channel->efx->net_dev, 282 "channel %d scheduling NAPI poll on CPU%d\n", 283 channel->channel, raw_smp_processor_id()); 284 285 napi_schedule(&channel->napi_str); 286 } 287 288 static inline void efx_schedule_channel_irq(struct efx_channel *channel) 289 { 290 channel->event_test_cpu = raw_smp_processor_id(); 291 efx_schedule_channel(channel); 292 } 293 294 void efx_link_status_changed(struct efx_nic *efx); 295 void efx_link_set_advertising(struct efx_nic *efx, 296 const unsigned long *advertising); 297 void efx_link_clear_advertising(struct efx_nic *efx); 298 void efx_link_set_wanted_fc(struct efx_nic *efx, u8); 299 300 static inline void efx_device_detach_sync(struct efx_nic *efx) 301 { 302 struct net_device *dev = efx->net_dev; 303 304 /* Lock/freeze all TX queues so that we can be sure the 305 * TX scheduler is stopped when we're done and before 306 * netif_device_present() becomes false. 307 */ 308 netif_tx_lock_bh(dev); 309 netif_device_detach(dev); 310 netif_tx_unlock_bh(dev); 311 } 312 313 static inline void efx_device_attach_if_not_resetting(struct efx_nic *efx) 314 { 315 if ((efx->state != STATE_DISABLED) && !efx->reset_pending) 316 netif_device_attach(efx->net_dev); 317 } 318 319 static inline bool efx_rwsem_assert_write_locked(struct rw_semaphore *sem) 320 { 321 if (WARN_ON(down_read_trylock(sem))) { 322 up_read(sem); 323 return false; 324 } 325 return true; 326 } 327 328 #endif /* EFX_EFX_H */ 329