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, u32 handle, __be16 proto, 36 struct tc_to_netdev *tc); 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(unsigned long context); 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 #define EFX_TXQ_MAX_ENT(efx) (EFX_WORKAROUND_35388(efx) ? \ 78 EFX_MAX_DMAQ_SIZE / 2 : EFX_MAX_DMAQ_SIZE) 79 80 static inline bool efx_rss_enabled(struct efx_nic *efx) 81 { 82 return efx->rss_spread > 1; 83 } 84 85 /* Filters */ 86 87 void efx_mac_reconfigure(struct efx_nic *efx); 88 89 /** 90 * efx_filter_insert_filter - add or replace a filter 91 * @efx: NIC in which to insert the filter 92 * @spec: Specification for the filter 93 * @replace_equal: Flag for whether the specified filter may replace an 94 * existing filter with equal priority 95 * 96 * On success, return the filter ID. 97 * On failure, return a negative error code. 98 * 99 * If existing filters have equal match values to the new filter spec, 100 * then the new filter might replace them or the function might fail, 101 * as follows. 102 * 103 * 1. If the existing filters have lower priority, or @replace_equal 104 * is set and they have equal priority, replace them. 105 * 106 * 2. If the existing filters have higher priority, return -%EPERM. 107 * 108 * 3. If !efx_filter_is_mc_recipient(@spec), or the NIC does not 109 * support delivery to multiple recipients, return -%EEXIST. 110 * 111 * This implies that filters for multiple multicast recipients must 112 * all be inserted with the same priority and @replace_equal = %false. 113 */ 114 static inline s32 efx_filter_insert_filter(struct efx_nic *efx, 115 struct efx_filter_spec *spec, 116 bool replace_equal) 117 { 118 return efx->type->filter_insert(efx, spec, replace_equal); 119 } 120 121 /** 122 * efx_filter_remove_id_safe - remove a filter by ID, carefully 123 * @efx: NIC from which to remove the filter 124 * @priority: Priority of filter, as passed to @efx_filter_insert_filter 125 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter 126 * 127 * This function will range-check @filter_id, so it is safe to call 128 * with a value passed from userland. 129 */ 130 static inline int efx_filter_remove_id_safe(struct efx_nic *efx, 131 enum efx_filter_priority priority, 132 u32 filter_id) 133 { 134 return efx->type->filter_remove_safe(efx, priority, filter_id); 135 } 136 137 /** 138 * efx_filter_get_filter_safe - retrieve a filter by ID, carefully 139 * @efx: NIC from which to remove the filter 140 * @priority: Priority of filter, as passed to @efx_filter_insert_filter 141 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter 142 * @spec: Buffer in which to store filter specification 143 * 144 * This function will range-check @filter_id, so it is safe to call 145 * with a value passed from userland. 146 */ 147 static inline int 148 efx_filter_get_filter_safe(struct efx_nic *efx, 149 enum efx_filter_priority priority, 150 u32 filter_id, struct efx_filter_spec *spec) 151 { 152 return efx->type->filter_get_safe(efx, priority, filter_id, spec); 153 } 154 155 static inline u32 efx_filter_count_rx_used(struct efx_nic *efx, 156 enum efx_filter_priority priority) 157 { 158 return efx->type->filter_count_rx_used(efx, priority); 159 } 160 static inline u32 efx_filter_get_rx_id_limit(struct efx_nic *efx) 161 { 162 return efx->type->filter_get_rx_id_limit(efx); 163 } 164 static inline s32 efx_filter_get_rx_ids(struct efx_nic *efx, 165 enum efx_filter_priority priority, 166 u32 *buf, u32 size) 167 { 168 return efx->type->filter_get_rx_ids(efx, priority, buf, size); 169 } 170 #ifdef CONFIG_RFS_ACCEL 171 int efx_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb, 172 u16 rxq_index, u32 flow_id); 173 bool __efx_filter_rfs_expire(struct efx_nic *efx, unsigned quota); 174 static inline void efx_filter_rfs_expire(struct efx_channel *channel) 175 { 176 if (channel->rfs_filters_added >= 60 && 177 __efx_filter_rfs_expire(channel->efx, 100)) 178 channel->rfs_filters_added -= 60; 179 } 180 #define efx_filter_rfs_enabled() 1 181 #else 182 static inline void efx_filter_rfs_expire(struct efx_channel *channel) {} 183 #define efx_filter_rfs_enabled() 0 184 #endif 185 bool efx_filter_is_mc_recipient(const struct efx_filter_spec *spec); 186 187 /* Channels */ 188 int efx_channel_dummy_op_int(struct efx_channel *channel); 189 void efx_channel_dummy_op_void(struct efx_channel *channel); 190 int efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries); 191 192 /* Ports */ 193 int efx_reconfigure_port(struct efx_nic *efx); 194 int __efx_reconfigure_port(struct efx_nic *efx); 195 196 /* Ethtool support */ 197 extern const struct ethtool_ops efx_ethtool_ops; 198 199 /* Reset handling */ 200 int efx_reset(struct efx_nic *efx, enum reset_type method); 201 void efx_reset_down(struct efx_nic *efx, enum reset_type method); 202 int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok); 203 int efx_try_recovery(struct efx_nic *efx); 204 205 /* Global */ 206 void efx_schedule_reset(struct efx_nic *efx, enum reset_type type); 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, u32); 262 void efx_link_set_wanted_fc(struct efx_nic *efx, u8); 263 264 static inline void efx_device_detach_sync(struct efx_nic *efx) 265 { 266 struct net_device *dev = efx->net_dev; 267 268 /* Lock/freeze all TX queues so that we can be sure the 269 * TX scheduler is stopped when we're done and before 270 * netif_device_present() becomes false. 271 */ 272 netif_tx_lock_bh(dev); 273 netif_device_detach(dev); 274 netif_tx_unlock_bh(dev); 275 } 276 277 #endif /* EFX_EFX_H */ 278