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 void efx_rx_config_page_split(struct efx_nic *efx); 39 int efx_probe_rx_queue(struct efx_rx_queue *rx_queue); 40 void efx_remove_rx_queue(struct efx_rx_queue *rx_queue); 41 void efx_init_rx_queue(struct efx_rx_queue *rx_queue); 42 void efx_fini_rx_queue(struct efx_rx_queue *rx_queue); 43 void efx_fast_push_rx_descriptors(struct efx_rx_queue *rx_queue, bool atomic); 44 void efx_rx_slow_fill(struct timer_list *t); 45 void __efx_rx_packet(struct efx_channel *channel); 46 void efx_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index, 47 unsigned int n_frags, unsigned int len, u16 flags); 48 static inline void efx_rx_flush_packet(struct efx_channel *channel) 49 { 50 if (channel->rx_pkt_n_frags) 51 __efx_rx_packet(channel); 52 } 53 void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue); 54 55 #define EFX_MAX_DMAQ_SIZE 4096UL 56 #define EFX_DEFAULT_DMAQ_SIZE 1024UL 57 #define EFX_MIN_DMAQ_SIZE 512UL 58 59 #define EFX_MAX_EVQ_SIZE 16384UL 60 #define EFX_MIN_EVQ_SIZE 512UL 61 62 /* Maximum number of TCP segments we support for soft-TSO */ 63 #define EFX_TSO_MAX_SEGS 100 64 65 /* The smallest [rt]xq_entries that the driver supports. RX minimum 66 * is a bit arbitrary. For TX, we must have space for at least 2 67 * TSO skbs. 68 */ 69 #define EFX_RXQ_MIN_ENT 128U 70 #define EFX_TXQ_MIN_ENT(efx) (2 * efx_tx_max_skb_descs(efx)) 71 72 /* All EF10 architecture NICs steal one bit of the DMAQ size for various 73 * other purposes when counting TxQ entries, so we halve the queue size. 74 */ 75 #define EFX_TXQ_MAX_ENT(efx) (EFX_WORKAROUND_EF10(efx) ? \ 76 EFX_MAX_DMAQ_SIZE / 2 : EFX_MAX_DMAQ_SIZE) 77 78 static inline bool efx_rss_enabled(struct efx_nic *efx) 79 { 80 return efx->rss_spread > 1; 81 } 82 83 /* Filters */ 84 85 void efx_mac_reconfigure(struct efx_nic *efx); 86 87 /** 88 * efx_filter_insert_filter - add or replace a filter 89 * @efx: NIC in which to insert the filter 90 * @spec: Specification for the filter 91 * @replace_equal: Flag for whether the specified filter may replace an 92 * existing filter with equal priority 93 * 94 * On success, return the filter ID. 95 * On failure, return a negative error code. 96 * 97 * If existing filters have equal match values to the new filter spec, 98 * then the new filter might replace them or the function might fail, 99 * as follows. 100 * 101 * 1. If the existing filters have lower priority, or @replace_equal 102 * is set and they have equal priority, replace them. 103 * 104 * 2. If the existing filters have higher priority, return -%EPERM. 105 * 106 * 3. If !efx_filter_is_mc_recipient(@spec), or the NIC does not 107 * support delivery to multiple recipients, return -%EEXIST. 108 * 109 * This implies that filters for multiple multicast recipients must 110 * all be inserted with the same priority and @replace_equal = %false. 111 */ 112 static inline s32 efx_filter_insert_filter(struct efx_nic *efx, 113 struct efx_filter_spec *spec, 114 bool replace_equal) 115 { 116 return efx->type->filter_insert(efx, spec, replace_equal); 117 } 118 119 /** 120 * efx_filter_remove_id_safe - remove a filter by ID, carefully 121 * @efx: NIC from which to remove the filter 122 * @priority: Priority of filter, as passed to @efx_filter_insert_filter 123 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter 124 * 125 * This function will range-check @filter_id, so it is safe to call 126 * with a value passed from userland. 127 */ 128 static inline int efx_filter_remove_id_safe(struct efx_nic *efx, 129 enum efx_filter_priority priority, 130 u32 filter_id) 131 { 132 return efx->type->filter_remove_safe(efx, priority, filter_id); 133 } 134 135 /** 136 * efx_filter_get_filter_safe - retrieve a filter by ID, carefully 137 * @efx: NIC from which to remove the filter 138 * @priority: Priority of filter, as passed to @efx_filter_insert_filter 139 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter 140 * @spec: Buffer in which to store filter specification 141 * 142 * This function will range-check @filter_id, so it is safe to call 143 * with a value passed from userland. 144 */ 145 static inline int 146 efx_filter_get_filter_safe(struct efx_nic *efx, 147 enum efx_filter_priority priority, 148 u32 filter_id, struct efx_filter_spec *spec) 149 { 150 return efx->type->filter_get_safe(efx, priority, filter_id, spec); 151 } 152 153 static inline u32 efx_filter_count_rx_used(struct efx_nic *efx, 154 enum efx_filter_priority priority) 155 { 156 return efx->type->filter_count_rx_used(efx, priority); 157 } 158 static inline u32 efx_filter_get_rx_id_limit(struct efx_nic *efx) 159 { 160 return efx->type->filter_get_rx_id_limit(efx); 161 } 162 static inline s32 efx_filter_get_rx_ids(struct efx_nic *efx, 163 enum efx_filter_priority priority, 164 u32 *buf, u32 size) 165 { 166 return efx->type->filter_get_rx_ids(efx, priority, buf, size); 167 } 168 #ifdef CONFIG_RFS_ACCEL 169 int efx_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb, 170 u16 rxq_index, u32 flow_id); 171 bool __efx_filter_rfs_expire(struct efx_nic *efx, unsigned quota); 172 static inline void efx_filter_rfs_expire(struct efx_channel *channel) 173 { 174 if (channel->rfs_filters_added >= 60 && 175 __efx_filter_rfs_expire(channel->efx, 100)) 176 channel->rfs_filters_added -= 60; 177 } 178 #define efx_filter_rfs_enabled() 1 179 #else 180 static inline void efx_filter_rfs_expire(struct efx_channel *channel) {} 181 #define efx_filter_rfs_enabled() 0 182 #endif 183 bool efx_filter_is_mc_recipient(const struct efx_filter_spec *spec); 184 185 /* Channels */ 186 int efx_channel_dummy_op_int(struct efx_channel *channel); 187 void efx_channel_dummy_op_void(struct efx_channel *channel); 188 int efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries); 189 190 /* Ports */ 191 int efx_reconfigure_port(struct efx_nic *efx); 192 int __efx_reconfigure_port(struct efx_nic *efx); 193 194 /* Ethtool support */ 195 extern const struct ethtool_ops efx_ethtool_ops; 196 197 /* Reset handling */ 198 int efx_reset(struct efx_nic *efx, enum reset_type method); 199 void efx_reset_down(struct efx_nic *efx, enum reset_type method); 200 int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok); 201 int efx_try_recovery(struct efx_nic *efx); 202 203 /* Global */ 204 void efx_schedule_reset(struct efx_nic *efx, enum reset_type type); 205 unsigned int efx_usecs_to_ticks(struct efx_nic *efx, unsigned int usecs); 206 unsigned int efx_ticks_to_usecs(struct efx_nic *efx, unsigned int ticks); 207 int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs, 208 unsigned int rx_usecs, bool rx_adaptive, 209 bool rx_may_override_tx); 210 void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs, 211 unsigned int *rx_usecs, bool *rx_adaptive); 212 void efx_stop_eventq(struct efx_channel *channel); 213 void efx_start_eventq(struct efx_channel *channel); 214 215 /* Dummy PHY ops for PHY drivers */ 216 int efx_port_dummy_op_int(struct efx_nic *efx); 217 void efx_port_dummy_op_void(struct efx_nic *efx); 218 219 /* Update the generic software stats in the passed stats array */ 220 void efx_update_sw_stats(struct efx_nic *efx, u64 *stats); 221 222 /* MTD */ 223 #ifdef CONFIG_SFC_MTD 224 int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts, 225 size_t n_parts, size_t sizeof_part); 226 static inline int efx_mtd_probe(struct efx_nic *efx) 227 { 228 return efx->type->mtd_probe(efx); 229 } 230 void efx_mtd_rename(struct efx_nic *efx); 231 void efx_mtd_remove(struct efx_nic *efx); 232 #else 233 static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; } 234 static inline void efx_mtd_rename(struct efx_nic *efx) {} 235 static inline void efx_mtd_remove(struct efx_nic *efx) {} 236 #endif 237 238 #ifdef CONFIG_SFC_SRIOV 239 static inline unsigned int efx_vf_size(struct efx_nic *efx) 240 { 241 return 1 << efx->vi_scale; 242 } 243 #endif 244 245 static inline void efx_schedule_channel(struct efx_channel *channel) 246 { 247 netif_vdbg(channel->efx, intr, channel->efx->net_dev, 248 "channel %d scheduling NAPI poll on CPU%d\n", 249 channel->channel, raw_smp_processor_id()); 250 251 napi_schedule(&channel->napi_str); 252 } 253 254 static inline void efx_schedule_channel_irq(struct efx_channel *channel) 255 { 256 channel->event_test_cpu = raw_smp_processor_id(); 257 efx_schedule_channel(channel); 258 } 259 260 void efx_link_status_changed(struct efx_nic *efx); 261 void efx_link_set_advertising(struct efx_nic *efx, 262 const unsigned long *advertising); 263 void efx_link_clear_advertising(struct efx_nic *efx); 264 void efx_link_set_wanted_fc(struct efx_nic *efx, u8); 265 266 static 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 */ 274 netif_tx_lock_bh(dev); 275 netif_device_detach(dev); 276 netif_tx_unlock_bh(dev); 277 } 278 279 static inline void efx_device_attach_if_not_resetting(struct efx_nic *efx) 280 { 281 if ((efx->state != STATE_DISABLED) && !efx->reset_pending) 282 netif_device_attach(efx->net_dev); 283 } 284 285 static inline bool efx_rwsem_assert_write_locked(struct rw_semaphore *sem) 286 { 287 if (WARN_ON(down_read_trylock(sem))) { 288 up_read(sem); 289 return false; 290 } 291 return true; 292 } 293 294 #endif /* EFX_EFX_H */ 295