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, u8 num_tc); 36 unsigned int efx_tx_max_skb_descs(struct efx_nic *efx); 37 extern unsigned int efx_piobuf_size; 38 extern bool efx_separate_tx_channels; 39 40 /* RX */ 41 void efx_set_default_rx_indir_table(struct efx_nic *efx); 42 void efx_rx_config_page_split(struct efx_nic *efx); 43 int efx_probe_rx_queue(struct efx_rx_queue *rx_queue); 44 void efx_remove_rx_queue(struct efx_rx_queue *rx_queue); 45 void efx_init_rx_queue(struct efx_rx_queue *rx_queue); 46 void efx_fini_rx_queue(struct efx_rx_queue *rx_queue); 47 void efx_fast_push_rx_descriptors(struct efx_rx_queue *rx_queue, bool atomic); 48 void efx_rx_slow_fill(unsigned long context); 49 void __efx_rx_packet(struct efx_channel *channel); 50 void efx_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index, 51 unsigned int n_frags, unsigned int len, u16 flags); 52 static inline void efx_rx_flush_packet(struct efx_channel *channel) 53 { 54 if (channel->rx_pkt_n_frags) 55 __efx_rx_packet(channel); 56 } 57 void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue); 58 59 #define EFX_MAX_DMAQ_SIZE 4096UL 60 #define EFX_DEFAULT_DMAQ_SIZE 1024UL 61 #define EFX_MIN_DMAQ_SIZE 512UL 62 63 #define EFX_MAX_EVQ_SIZE 16384UL 64 #define EFX_MIN_EVQ_SIZE 512UL 65 66 /* Maximum number of TCP segments we support for soft-TSO */ 67 #define EFX_TSO_MAX_SEGS 100 68 69 /* The smallest [rt]xq_entries that the driver supports. RX minimum 70 * is a bit arbitrary. For TX, we must have space for at least 2 71 * TSO skbs. 72 */ 73 #define EFX_RXQ_MIN_ENT 128U 74 #define EFX_TXQ_MIN_ENT(efx) (2 * efx_tx_max_skb_descs(efx)) 75 76 #define EFX_TXQ_MAX_ENT(efx) (EFX_WORKAROUND_35388(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 efx_channel *channel) 174 { 175 if (channel->rfs_filters_added >= 60 && 176 __efx_filter_rfs_expire(channel->efx, 100)) 177 channel->rfs_filters_added -= 60; 178 } 179 #define efx_filter_rfs_enabled() 1 180 #else 181 static inline void efx_filter_rfs_expire(struct efx_channel *channel) {} 182 #define efx_filter_rfs_enabled() 0 183 #endif 184 bool efx_filter_is_mc_recipient(const struct efx_filter_spec *spec); 185 186 /* Channels */ 187 int efx_channel_dummy_op_int(struct efx_channel *channel); 188 void efx_channel_dummy_op_void(struct efx_channel *channel); 189 int efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries); 190 191 /* Ports */ 192 int efx_reconfigure_port(struct efx_nic *efx); 193 int __efx_reconfigure_port(struct efx_nic *efx); 194 195 /* Ethtool support */ 196 extern const struct ethtool_ops efx_ethtool_ops; 197 198 /* Reset handling */ 199 int efx_reset(struct efx_nic *efx, enum reset_type method); 200 void efx_reset_down(struct efx_nic *efx, enum reset_type method); 201 int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok); 202 int efx_try_recovery(struct efx_nic *efx); 203 204 /* Global */ 205 void efx_schedule_reset(struct efx_nic *efx, enum reset_type type); 206 int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs, 207 unsigned int rx_usecs, bool rx_adaptive, 208 bool rx_may_override_tx); 209 void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs, 210 unsigned int *rx_usecs, bool *rx_adaptive); 211 void efx_stop_eventq(struct efx_channel *channel); 212 void efx_start_eventq(struct efx_channel *channel); 213 214 /* Dummy PHY ops for PHY drivers */ 215 int efx_port_dummy_op_int(struct efx_nic *efx); 216 void efx_port_dummy_op_void(struct efx_nic *efx); 217 218 /* Update the generic software stats in the passed stats array */ 219 void efx_update_sw_stats(struct efx_nic *efx, u64 *stats); 220 221 /* MTD */ 222 #ifdef CONFIG_SFC_MTD 223 int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts, 224 size_t n_parts, size_t sizeof_part); 225 static inline int efx_mtd_probe(struct efx_nic *efx) 226 { 227 return efx->type->mtd_probe(efx); 228 } 229 void efx_mtd_rename(struct efx_nic *efx); 230 void efx_mtd_remove(struct efx_nic *efx); 231 #else 232 static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; } 233 static inline void efx_mtd_rename(struct efx_nic *efx) {} 234 static inline void efx_mtd_remove(struct efx_nic *efx) {} 235 #endif 236 237 #ifdef CONFIG_SFC_SRIOV 238 static inline unsigned int efx_vf_size(struct efx_nic *efx) 239 { 240 return 1 << efx->vi_scale; 241 } 242 #endif 243 244 static inline void efx_schedule_channel(struct efx_channel *channel) 245 { 246 netif_vdbg(channel->efx, intr, channel->efx->net_dev, 247 "channel %d scheduling NAPI poll on CPU%d\n", 248 channel->channel, raw_smp_processor_id()); 249 250 napi_schedule(&channel->napi_str); 251 } 252 253 static inline void efx_schedule_channel_irq(struct efx_channel *channel) 254 { 255 channel->event_test_cpu = raw_smp_processor_id(); 256 efx_schedule_channel(channel); 257 } 258 259 void efx_link_status_changed(struct efx_nic *efx); 260 void efx_link_set_advertising(struct efx_nic *efx, u32); 261 void efx_link_set_wanted_fc(struct efx_nic *efx, u8); 262 263 static inline void efx_device_detach_sync(struct efx_nic *efx) 264 { 265 struct net_device *dev = efx->net_dev; 266 267 /* Lock/freeze all TX queues so that we can be sure the 268 * TX scheduler is stopped when we're done and before 269 * netif_device_present() becomes false. 270 */ 271 netif_tx_lock_bh(dev); 272 netif_device_detach(dev); 273 netif_tx_unlock_bh(dev); 274 } 275 276 #endif /* EFX_EFX_H */ 277