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 /* All controllers use BAR 0 for I/O space and BAR 2(&3) for memory */ 18 /* All VFs use BAR 0/1 for memory */ 19 #define EFX_MEM_BAR 2 20 #define EFX_MEM_VF_BAR 0 21 22 int efx_net_open(struct net_device *net_dev); 23 int efx_net_stop(struct net_device *net_dev); 24 25 /* TX */ 26 int efx_probe_tx_queue(struct efx_tx_queue *tx_queue); 27 void efx_remove_tx_queue(struct efx_tx_queue *tx_queue); 28 void efx_init_tx_queue(struct efx_tx_queue *tx_queue); 29 void efx_init_tx_queue_core_txq(struct efx_tx_queue *tx_queue); 30 void efx_fini_tx_queue(struct efx_tx_queue *tx_queue); 31 netdev_tx_t efx_hard_start_xmit(struct sk_buff *skb, 32 struct net_device *net_dev); 33 netdev_tx_t efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb); 34 void efx_xmit_done(struct efx_tx_queue *tx_queue, unsigned int index); 35 int efx_setup_tc(struct net_device *net_dev, enum tc_setup_type type, 36 void *type_data); 37 unsigned int efx_tx_max_skb_descs(struct efx_nic *efx); 38 extern unsigned int efx_piobuf_size; 39 extern bool efx_separate_tx_channels; 40 41 /* RX */ 42 void efx_set_default_rx_indir_table(struct efx_nic *efx); 43 void efx_rx_config_page_split(struct efx_nic *efx); 44 int efx_probe_rx_queue(struct efx_rx_queue *rx_queue); 45 void efx_remove_rx_queue(struct efx_rx_queue *rx_queue); 46 void efx_init_rx_queue(struct efx_rx_queue *rx_queue); 47 void efx_fini_rx_queue(struct efx_rx_queue *rx_queue); 48 void efx_fast_push_rx_descriptors(struct efx_rx_queue *rx_queue, bool atomic); 49 void efx_rx_slow_fill(struct timer_list *t); 50 void __efx_rx_packet(struct efx_channel *channel); 51 void efx_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index, 52 unsigned int n_frags, unsigned int len, u16 flags); 53 static inline void efx_rx_flush_packet(struct efx_channel *channel) 54 { 55 if (channel->rx_pkt_n_frags) 56 __efx_rx_packet(channel); 57 } 58 void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue); 59 60 #define EFX_MAX_DMAQ_SIZE 4096UL 61 #define EFX_DEFAULT_DMAQ_SIZE 1024UL 62 #define EFX_MIN_DMAQ_SIZE 512UL 63 64 #define EFX_MAX_EVQ_SIZE 16384UL 65 #define EFX_MIN_EVQ_SIZE 512UL 66 67 /* Maximum number of TCP segments we support for soft-TSO */ 68 #define EFX_TSO_MAX_SEGS 100 69 70 /* The smallest [rt]xq_entries that the driver supports. RX minimum 71 * is a bit arbitrary. For TX, we must have space for at least 2 72 * TSO skbs. 73 */ 74 #define EFX_RXQ_MIN_ENT 128U 75 #define EFX_TXQ_MIN_ENT(efx) (2 * efx_tx_max_skb_descs(efx)) 76 77 /* All EF10 architecture NICs steal one bit of the DMAQ size for various 78 * other purposes when counting TxQ entries, so we halve the queue size. 79 */ 80 #define EFX_TXQ_MAX_ENT(efx) (EFX_WORKAROUND_EF10(efx) ? \ 81 EFX_MAX_DMAQ_SIZE / 2 : EFX_MAX_DMAQ_SIZE) 82 83 static inline bool efx_rss_enabled(struct efx_nic *efx) 84 { 85 return efx->rss_spread > 1; 86 } 87 88 /* Filters */ 89 90 void efx_mac_reconfigure(struct efx_nic *efx); 91 92 /** 93 * efx_filter_insert_filter - add or replace a filter 94 * @efx: NIC in which to insert the filter 95 * @spec: Specification for the filter 96 * @replace_equal: Flag for whether the specified filter may replace an 97 * existing filter with equal priority 98 * 99 * On success, return the filter ID. 100 * On failure, return a negative error code. 101 * 102 * If existing filters have equal match values to the new filter spec, 103 * then the new filter might replace them or the function might fail, 104 * as follows. 105 * 106 * 1. If the existing filters have lower priority, or @replace_equal 107 * is set and they have equal priority, replace them. 108 * 109 * 2. If the existing filters have higher priority, return -%EPERM. 110 * 111 * 3. If !efx_filter_is_mc_recipient(@spec), or the NIC does not 112 * support delivery to multiple recipients, return -%EEXIST. 113 * 114 * This implies that filters for multiple multicast recipients must 115 * all be inserted with the same priority and @replace_equal = %false. 116 */ 117 static inline s32 efx_filter_insert_filter(struct efx_nic *efx, 118 struct efx_filter_spec *spec, 119 bool replace_equal) 120 { 121 return efx->type->filter_insert(efx, spec, replace_equal); 122 } 123 124 /** 125 * efx_filter_remove_id_safe - remove a filter by ID, carefully 126 * @efx: NIC from which to remove the filter 127 * @priority: Priority of filter, as passed to @efx_filter_insert_filter 128 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter 129 * 130 * This function will range-check @filter_id, so it is safe to call 131 * with a value passed from userland. 132 */ 133 static inline int efx_filter_remove_id_safe(struct efx_nic *efx, 134 enum efx_filter_priority priority, 135 u32 filter_id) 136 { 137 return efx->type->filter_remove_safe(efx, priority, filter_id); 138 } 139 140 /** 141 * efx_filter_get_filter_safe - retrieve a filter by ID, carefully 142 * @efx: NIC from which to remove the filter 143 * @priority: Priority of filter, as passed to @efx_filter_insert_filter 144 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter 145 * @spec: Buffer in which to store filter specification 146 * 147 * This function will range-check @filter_id, so it is safe to call 148 * with a value passed from userland. 149 */ 150 static inline int 151 efx_filter_get_filter_safe(struct efx_nic *efx, 152 enum efx_filter_priority priority, 153 u32 filter_id, struct efx_filter_spec *spec) 154 { 155 return efx->type->filter_get_safe(efx, priority, filter_id, spec); 156 } 157 158 static inline u32 efx_filter_count_rx_used(struct efx_nic *efx, 159 enum efx_filter_priority priority) 160 { 161 return efx->type->filter_count_rx_used(efx, priority); 162 } 163 static inline u32 efx_filter_get_rx_id_limit(struct efx_nic *efx) 164 { 165 return efx->type->filter_get_rx_id_limit(efx); 166 } 167 static inline s32 efx_filter_get_rx_ids(struct efx_nic *efx, 168 enum efx_filter_priority priority, 169 u32 *buf, u32 size) 170 { 171 return efx->type->filter_get_rx_ids(efx, priority, buf, size); 172 } 173 #ifdef CONFIG_RFS_ACCEL 174 int efx_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb, 175 u16 rxq_index, u32 flow_id); 176 bool __efx_filter_rfs_expire(struct efx_nic *efx, unsigned quota); 177 static inline void efx_filter_rfs_expire(struct efx_channel *channel) 178 { 179 if (channel->rfs_filters_added >= 60 && 180 __efx_filter_rfs_expire(channel->efx, 100)) 181 channel->rfs_filters_added -= 60; 182 } 183 #define efx_filter_rfs_enabled() 1 184 #else 185 static inline void efx_filter_rfs_expire(struct efx_channel *channel) {} 186 #define efx_filter_rfs_enabled() 0 187 #endif 188 bool efx_filter_is_mc_recipient(const struct efx_filter_spec *spec); 189 190 /* Channels */ 191 int efx_channel_dummy_op_int(struct efx_channel *channel); 192 void efx_channel_dummy_op_void(struct efx_channel *channel); 193 int efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries); 194 195 /* Ports */ 196 int efx_reconfigure_port(struct efx_nic *efx); 197 int __efx_reconfigure_port(struct efx_nic *efx); 198 199 /* Ethtool support */ 200 extern const struct ethtool_ops efx_ethtool_ops; 201 202 /* Reset handling */ 203 int efx_reset(struct efx_nic *efx, enum reset_type method); 204 void efx_reset_down(struct efx_nic *efx, enum reset_type method); 205 int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok); 206 int efx_try_recovery(struct efx_nic *efx); 207 208 /* Global */ 209 void efx_schedule_reset(struct efx_nic *efx, enum reset_type type); 210 unsigned int efx_usecs_to_ticks(struct efx_nic *efx, unsigned int usecs); 211 unsigned int efx_ticks_to_usecs(struct efx_nic *efx, unsigned int ticks); 212 int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs, 213 unsigned int rx_usecs, bool rx_adaptive, 214 bool rx_may_override_tx); 215 void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs, 216 unsigned int *rx_usecs, bool *rx_adaptive); 217 void efx_stop_eventq(struct efx_channel *channel); 218 void efx_start_eventq(struct efx_channel *channel); 219 220 /* Dummy PHY ops for PHY drivers */ 221 int efx_port_dummy_op_int(struct efx_nic *efx); 222 void efx_port_dummy_op_void(struct efx_nic *efx); 223 224 /* Update the generic software stats in the passed stats array */ 225 void efx_update_sw_stats(struct efx_nic *efx, u64 *stats); 226 227 /* MTD */ 228 #ifdef CONFIG_SFC_MTD 229 int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts, 230 size_t n_parts, size_t sizeof_part); 231 static inline int efx_mtd_probe(struct efx_nic *efx) 232 { 233 return efx->type->mtd_probe(efx); 234 } 235 void efx_mtd_rename(struct efx_nic *efx); 236 void efx_mtd_remove(struct efx_nic *efx); 237 #else 238 static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; } 239 static inline void efx_mtd_rename(struct efx_nic *efx) {} 240 static inline void efx_mtd_remove(struct efx_nic *efx) {} 241 #endif 242 243 #ifdef CONFIG_SFC_SRIOV 244 static inline unsigned int efx_vf_size(struct efx_nic *efx) 245 { 246 return 1 << efx->vi_scale; 247 } 248 #endif 249 250 static inline void efx_schedule_channel(struct efx_channel *channel) 251 { 252 netif_vdbg(channel->efx, intr, channel->efx->net_dev, 253 "channel %d scheduling NAPI poll on CPU%d\n", 254 channel->channel, raw_smp_processor_id()); 255 256 napi_schedule(&channel->napi_str); 257 } 258 259 static inline void efx_schedule_channel_irq(struct efx_channel *channel) 260 { 261 channel->event_test_cpu = raw_smp_processor_id(); 262 efx_schedule_channel(channel); 263 } 264 265 void efx_link_status_changed(struct efx_nic *efx); 266 void efx_link_set_advertising(struct efx_nic *efx, u32); 267 void efx_link_set_wanted_fc(struct efx_nic *efx, u8); 268 269 static inline void efx_device_detach_sync(struct efx_nic *efx) 270 { 271 struct net_device *dev = efx->net_dev; 272 273 /* Lock/freeze all TX queues so that we can be sure the 274 * TX scheduler is stopped when we're done and before 275 * netif_device_present() becomes false. 276 */ 277 netif_tx_lock_bh(dev); 278 netif_device_detach(dev); 279 netif_tx_unlock_bh(dev); 280 } 281 282 static inline void efx_device_attach_if_not_resetting(struct efx_nic *efx) 283 { 284 if ((efx->state != STATE_DISABLED) && !efx->reset_pending) 285 netif_device_attach(efx->net_dev); 286 } 287 288 static inline bool efx_rwsem_assert_write_locked(struct rw_semaphore *sem) 289 { 290 if (WARN_ON(down_read_trylock(sem))) { 291 up_read(sem); 292 return false; 293 } 294 return true; 295 } 296 297 #endif /* EFX_EFX_H */ 298