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 /* Filters */ 80 81 void efx_mac_reconfigure(struct efx_nic *efx); 82 83 /** 84 * efx_filter_insert_filter - add or replace a filter 85 * @efx: NIC in which to insert the filter 86 * @spec: Specification for the filter 87 * @replace_equal: Flag for whether the specified filter may replace an 88 * existing filter with equal priority 89 * 90 * On success, return the filter ID. 91 * On failure, return a negative error code. 92 * 93 * If existing filters have equal match values to the new filter spec, 94 * then the new filter might replace them or the function might fail, 95 * as follows. 96 * 97 * 1. If the existing filters have lower priority, or @replace_equal 98 * is set and they have equal priority, replace them. 99 * 100 * 2. If the existing filters have higher priority, return -%EPERM. 101 * 102 * 3. If !efx_filter_is_mc_recipient(@spec), or the NIC does not 103 * support delivery to multiple recipients, return -%EEXIST. 104 * 105 * This implies that filters for multiple multicast recipients must 106 * all be inserted with the same priority and @replace_equal = %false. 107 */ 108 static inline s32 efx_filter_insert_filter(struct efx_nic *efx, 109 struct efx_filter_spec *spec, 110 bool replace_equal) 111 { 112 return efx->type->filter_insert(efx, spec, replace_equal); 113 } 114 115 /** 116 * efx_filter_remove_id_safe - remove a filter by ID, carefully 117 * @efx: NIC from which to remove the filter 118 * @priority: Priority of filter, as passed to @efx_filter_insert_filter 119 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter 120 * 121 * This function will range-check @filter_id, so it is safe to call 122 * with a value passed from userland. 123 */ 124 static inline int efx_filter_remove_id_safe(struct efx_nic *efx, 125 enum efx_filter_priority priority, 126 u32 filter_id) 127 { 128 return efx->type->filter_remove_safe(efx, priority, filter_id); 129 } 130 131 /** 132 * efx_filter_get_filter_safe - retrieve a filter by ID, carefully 133 * @efx: NIC from which to remove the filter 134 * @priority: Priority of filter, as passed to @efx_filter_insert_filter 135 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter 136 * @spec: Buffer in which to store filter specification 137 * 138 * This function will range-check @filter_id, so it is safe to call 139 * with a value passed from userland. 140 */ 141 static inline int 142 efx_filter_get_filter_safe(struct efx_nic *efx, 143 enum efx_filter_priority priority, 144 u32 filter_id, struct efx_filter_spec *spec) 145 { 146 return efx->type->filter_get_safe(efx, priority, filter_id, spec); 147 } 148 149 static inline u32 efx_filter_count_rx_used(struct efx_nic *efx, 150 enum efx_filter_priority priority) 151 { 152 return efx->type->filter_count_rx_used(efx, priority); 153 } 154 static inline u32 efx_filter_get_rx_id_limit(struct efx_nic *efx) 155 { 156 return efx->type->filter_get_rx_id_limit(efx); 157 } 158 static inline s32 efx_filter_get_rx_ids(struct efx_nic *efx, 159 enum efx_filter_priority priority, 160 u32 *buf, u32 size) 161 { 162 return efx->type->filter_get_rx_ids(efx, priority, buf, size); 163 } 164 #ifdef CONFIG_RFS_ACCEL 165 int efx_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb, 166 u16 rxq_index, u32 flow_id); 167 bool __efx_filter_rfs_expire(struct efx_nic *efx, unsigned quota); 168 static inline void efx_filter_rfs_expire(struct efx_channel *channel) 169 { 170 if (channel->rfs_filters_added >= 60 && 171 __efx_filter_rfs_expire(channel->efx, 100)) 172 channel->rfs_filters_added -= 60; 173 } 174 #define efx_filter_rfs_enabled() 1 175 #else 176 static inline void efx_filter_rfs_expire(struct efx_channel *channel) {} 177 #define efx_filter_rfs_enabled() 0 178 #endif 179 bool efx_filter_is_mc_recipient(const struct efx_filter_spec *spec); 180 181 /* Channels */ 182 int efx_channel_dummy_op_int(struct efx_channel *channel); 183 void efx_channel_dummy_op_void(struct efx_channel *channel); 184 int efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries); 185 186 /* Ports */ 187 int efx_reconfigure_port(struct efx_nic *efx); 188 int __efx_reconfigure_port(struct efx_nic *efx); 189 190 /* Ethtool support */ 191 extern const struct ethtool_ops efx_ethtool_ops; 192 193 /* Reset handling */ 194 int efx_reset(struct efx_nic *efx, enum reset_type method); 195 void efx_reset_down(struct efx_nic *efx, enum reset_type method); 196 int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok); 197 int efx_try_recovery(struct efx_nic *efx); 198 199 /* Global */ 200 void efx_schedule_reset(struct efx_nic *efx, enum reset_type type); 201 int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs, 202 unsigned int rx_usecs, bool rx_adaptive, 203 bool rx_may_override_tx); 204 void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs, 205 unsigned int *rx_usecs, bool *rx_adaptive); 206 void efx_stop_eventq(struct efx_channel *channel); 207 void efx_start_eventq(struct efx_channel *channel); 208 209 /* Dummy PHY ops for PHY drivers */ 210 int efx_port_dummy_op_int(struct efx_nic *efx); 211 void efx_port_dummy_op_void(struct efx_nic *efx); 212 213 /* Update the generic software stats in the passed stats array */ 214 void efx_update_sw_stats(struct efx_nic *efx, u64 *stats); 215 216 /* MTD */ 217 #ifdef CONFIG_SFC_MTD 218 int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts, 219 size_t n_parts, size_t sizeof_part); 220 static inline int efx_mtd_probe(struct efx_nic *efx) 221 { 222 return efx->type->mtd_probe(efx); 223 } 224 void efx_mtd_rename(struct efx_nic *efx); 225 void efx_mtd_remove(struct efx_nic *efx); 226 #else 227 static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; } 228 static inline void efx_mtd_rename(struct efx_nic *efx) {} 229 static inline void efx_mtd_remove(struct efx_nic *efx) {} 230 #endif 231 232 #ifdef CONFIG_SFC_SRIOV 233 static inline unsigned int efx_vf_size(struct efx_nic *efx) 234 { 235 return 1 << efx->vi_scale; 236 } 237 #endif 238 239 static inline void efx_schedule_channel(struct efx_channel *channel) 240 { 241 netif_vdbg(channel->efx, intr, channel->efx->net_dev, 242 "channel %d scheduling NAPI poll on CPU%d\n", 243 channel->channel, raw_smp_processor_id()); 244 245 napi_schedule(&channel->napi_str); 246 } 247 248 static inline void efx_schedule_channel_irq(struct efx_channel *channel) 249 { 250 channel->event_test_cpu = raw_smp_processor_id(); 251 efx_schedule_channel(channel); 252 } 253 254 void efx_link_status_changed(struct efx_nic *efx); 255 void efx_link_set_advertising(struct efx_nic *efx, u32); 256 void efx_link_set_wanted_fc(struct efx_nic *efx, u8); 257 258 static inline void efx_device_detach_sync(struct efx_nic *efx) 259 { 260 struct net_device *dev = efx->net_dev; 261 262 /* Lock/freeze all TX queues so that we can be sure the 263 * TX scheduler is stopped when we're done and before 264 * netif_device_present() becomes false. 265 */ 266 netif_tx_lock_bh(dev); 267 netif_device_detach(dev); 268 netif_tx_unlock_bh(dev); 269 } 270 271 #endif /* EFX_EFX_H */ 272