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 39 /* RX */ 40 void efx_set_default_rx_indir_table(struct efx_nic *efx); 41 void efx_rx_config_page_split(struct efx_nic *efx); 42 int efx_probe_rx_queue(struct efx_rx_queue *rx_queue); 43 void efx_remove_rx_queue(struct efx_rx_queue *rx_queue); 44 void efx_init_rx_queue(struct efx_rx_queue *rx_queue); 45 void efx_fini_rx_queue(struct efx_rx_queue *rx_queue); 46 void efx_fast_push_rx_descriptors(struct efx_rx_queue *rx_queue, bool atomic); 47 void efx_rx_slow_fill(unsigned long context); 48 void __efx_rx_packet(struct efx_channel *channel); 49 void efx_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index, 50 unsigned int n_frags, unsigned int len, u16 flags); 51 static inline void efx_rx_flush_packet(struct efx_channel *channel) 52 { 53 if (channel->rx_pkt_n_frags) 54 __efx_rx_packet(channel); 55 } 56 void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue); 57 58 #define EFX_MAX_DMAQ_SIZE 4096UL 59 #define EFX_DEFAULT_DMAQ_SIZE 1024UL 60 #define EFX_MIN_DMAQ_SIZE 512UL 61 62 #define EFX_MAX_EVQ_SIZE 16384UL 63 #define EFX_MIN_EVQ_SIZE 512UL 64 65 /* Maximum number of TCP segments we support for soft-TSO */ 66 #define EFX_TSO_MAX_SEGS 100 67 68 /* The smallest [rt]xq_entries that the driver supports. RX minimum 69 * is a bit arbitrary. For TX, we must have space for at least 2 70 * TSO skbs. 71 */ 72 #define EFX_RXQ_MIN_ENT 128U 73 #define EFX_TXQ_MIN_ENT(efx) (2 * efx_tx_max_skb_descs(efx)) 74 75 #define EFX_TXQ_MAX_ENT(efx) (EFX_WORKAROUND_35388(efx) ? \ 76 EFX_MAX_DMAQ_SIZE / 2 : EFX_MAX_DMAQ_SIZE) 77 78 /* Filters */ 79 80 void efx_mac_reconfigure(struct efx_nic *efx); 81 82 /** 83 * efx_filter_insert_filter - add or replace a filter 84 * @efx: NIC in which to insert the filter 85 * @spec: Specification for the filter 86 * @replace_equal: Flag for whether the specified filter may replace an 87 * existing filter with equal priority 88 * 89 * On success, return the filter ID. 90 * On failure, return a negative error code. 91 * 92 * If existing filters have equal match values to the new filter spec, 93 * then the new filter might replace them or the function might fail, 94 * as follows. 95 * 96 * 1. If the existing filters have lower priority, or @replace_equal 97 * is set and they have equal priority, replace them. 98 * 99 * 2. If the existing filters have higher priority, return -%EPERM. 100 * 101 * 3. If !efx_filter_is_mc_recipient(@spec), or the NIC does not 102 * support delivery to multiple recipients, return -%EEXIST. 103 * 104 * This implies that filters for multiple multicast recipients must 105 * all be inserted with the same priority and @replace_equal = %false. 106 */ 107 static inline s32 efx_filter_insert_filter(struct efx_nic *efx, 108 struct efx_filter_spec *spec, 109 bool replace_equal) 110 { 111 return efx->type->filter_insert(efx, spec, replace_equal); 112 } 113 114 /** 115 * efx_filter_remove_id_safe - remove a filter by ID, carefully 116 * @efx: NIC from which to remove the filter 117 * @priority: Priority of filter, as passed to @efx_filter_insert_filter 118 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter 119 * 120 * This function will range-check @filter_id, so it is safe to call 121 * with a value passed from userland. 122 */ 123 static inline int efx_filter_remove_id_safe(struct efx_nic *efx, 124 enum efx_filter_priority priority, 125 u32 filter_id) 126 { 127 return efx->type->filter_remove_safe(efx, priority, filter_id); 128 } 129 130 /** 131 * efx_filter_get_filter_safe - retrieve a filter by ID, carefully 132 * @efx: NIC from which to remove the filter 133 * @priority: Priority of filter, as passed to @efx_filter_insert_filter 134 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter 135 * @spec: Buffer in which to store filter specification 136 * 137 * This function will range-check @filter_id, so it is safe to call 138 * with a value passed from userland. 139 */ 140 static inline int 141 efx_filter_get_filter_safe(struct efx_nic *efx, 142 enum efx_filter_priority priority, 143 u32 filter_id, struct efx_filter_spec *spec) 144 { 145 return efx->type->filter_get_safe(efx, priority, filter_id, spec); 146 } 147 148 static inline u32 efx_filter_count_rx_used(struct efx_nic *efx, 149 enum efx_filter_priority priority) 150 { 151 return efx->type->filter_count_rx_used(efx, priority); 152 } 153 static inline u32 efx_filter_get_rx_id_limit(struct efx_nic *efx) 154 { 155 return efx->type->filter_get_rx_id_limit(efx); 156 } 157 static inline s32 efx_filter_get_rx_ids(struct efx_nic *efx, 158 enum efx_filter_priority priority, 159 u32 *buf, u32 size) 160 { 161 return efx->type->filter_get_rx_ids(efx, priority, buf, size); 162 } 163 #ifdef CONFIG_RFS_ACCEL 164 int efx_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb, 165 u16 rxq_index, u32 flow_id); 166 bool __efx_filter_rfs_expire(struct efx_nic *efx, unsigned quota); 167 static inline void efx_filter_rfs_expire(struct efx_channel *channel) 168 { 169 if (channel->rfs_filters_added >= 60 && 170 __efx_filter_rfs_expire(channel->efx, 100)) 171 channel->rfs_filters_added -= 60; 172 } 173 #define efx_filter_rfs_enabled() 1 174 #else 175 static inline void efx_filter_rfs_expire(struct efx_channel *channel) {} 176 #define efx_filter_rfs_enabled() 0 177 #endif 178 bool efx_filter_is_mc_recipient(const struct efx_filter_spec *spec); 179 180 /* Channels */ 181 int efx_channel_dummy_op_int(struct efx_channel *channel); 182 void efx_channel_dummy_op_void(struct efx_channel *channel); 183 int efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries); 184 185 /* Ports */ 186 int efx_reconfigure_port(struct efx_nic *efx); 187 int __efx_reconfigure_port(struct efx_nic *efx); 188 189 /* Ethtool support */ 190 extern const struct ethtool_ops efx_ethtool_ops; 191 192 /* Reset handling */ 193 int efx_reset(struct efx_nic *efx, enum reset_type method); 194 void efx_reset_down(struct efx_nic *efx, enum reset_type method); 195 int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok); 196 int efx_try_recovery(struct efx_nic *efx); 197 198 /* Global */ 199 void efx_schedule_reset(struct efx_nic *efx, enum reset_type type); 200 int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs, 201 unsigned int rx_usecs, bool rx_adaptive, 202 bool rx_may_override_tx); 203 void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs, 204 unsigned int *rx_usecs, bool *rx_adaptive); 205 void efx_stop_eventq(struct efx_channel *channel); 206 void efx_start_eventq(struct efx_channel *channel); 207 208 /* Dummy PHY ops for PHY drivers */ 209 int efx_port_dummy_op_int(struct efx_nic *efx); 210 void efx_port_dummy_op_void(struct efx_nic *efx); 211 212 /* Update the generic software stats in the passed stats array */ 213 void efx_update_sw_stats(struct efx_nic *efx, u64 *stats); 214 215 /* MTD */ 216 #ifdef CONFIG_SFC_MTD 217 int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts, 218 size_t n_parts, size_t sizeof_part); 219 static inline int efx_mtd_probe(struct efx_nic *efx) 220 { 221 return efx->type->mtd_probe(efx); 222 } 223 void efx_mtd_rename(struct efx_nic *efx); 224 void efx_mtd_remove(struct efx_nic *efx); 225 #else 226 static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; } 227 static inline void efx_mtd_rename(struct efx_nic *efx) {} 228 static inline void efx_mtd_remove(struct efx_nic *efx) {} 229 #endif 230 231 #ifdef CONFIG_SFC_SRIOV 232 static inline unsigned int efx_vf_size(struct efx_nic *efx) 233 { 234 return 1 << efx->vi_scale; 235 } 236 #endif 237 238 static inline void efx_schedule_channel(struct efx_channel *channel) 239 { 240 netif_vdbg(channel->efx, intr, channel->efx->net_dev, 241 "channel %d scheduling NAPI poll on CPU%d\n", 242 channel->channel, raw_smp_processor_id()); 243 244 napi_schedule(&channel->napi_str); 245 } 246 247 static inline void efx_schedule_channel_irq(struct efx_channel *channel) 248 { 249 channel->event_test_cpu = raw_smp_processor_id(); 250 efx_schedule_channel(channel); 251 } 252 253 void efx_link_status_changed(struct efx_nic *efx); 254 void efx_link_set_advertising(struct efx_nic *efx, u32); 255 void efx_link_set_wanted_fc(struct efx_nic *efx, u8); 256 257 static inline void efx_device_detach_sync(struct efx_nic *efx) 258 { 259 struct net_device *dev = efx->net_dev; 260 261 /* Lock/freeze all TX queues so that we can be sure the 262 * TX scheduler is stopped when we're done and before 263 * netif_device_present() becomes false. 264 */ 265 netif_tx_lock_bh(dev); 266 netif_device_detach(dev); 267 netif_tx_unlock_bh(dev); 268 } 269 270 #endif /* EFX_EFX_H */ 271