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 #define EFX_MEM_BAR 2 19 20 /* TX */ 21 int efx_probe_tx_queue(struct efx_tx_queue *tx_queue); 22 void efx_remove_tx_queue(struct efx_tx_queue *tx_queue); 23 void efx_init_tx_queue(struct efx_tx_queue *tx_queue); 24 void efx_init_tx_queue_core_txq(struct efx_tx_queue *tx_queue); 25 void efx_fini_tx_queue(struct efx_tx_queue *tx_queue); 26 netdev_tx_t efx_hard_start_xmit(struct sk_buff *skb, 27 struct net_device *net_dev); 28 netdev_tx_t efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb); 29 void efx_xmit_done(struct efx_tx_queue *tx_queue, unsigned int index); 30 int efx_setup_tc(struct net_device *net_dev, u8 num_tc); 31 unsigned int efx_tx_max_skb_descs(struct efx_nic *efx); 32 extern unsigned int efx_piobuf_size; 33 34 /* RX */ 35 void efx_rx_config_page_split(struct efx_nic *efx); 36 int efx_probe_rx_queue(struct efx_rx_queue *rx_queue); 37 void efx_remove_rx_queue(struct efx_rx_queue *rx_queue); 38 void efx_init_rx_queue(struct efx_rx_queue *rx_queue); 39 void efx_fini_rx_queue(struct efx_rx_queue *rx_queue); 40 void efx_fast_push_rx_descriptors(struct efx_rx_queue *rx_queue, bool atomic); 41 void efx_rx_slow_fill(unsigned long context); 42 void __efx_rx_packet(struct efx_channel *channel); 43 void efx_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index, 44 unsigned int n_frags, unsigned int len, u16 flags); 45 static inline void efx_rx_flush_packet(struct efx_channel *channel) 46 { 47 if (channel->rx_pkt_n_frags) 48 __efx_rx_packet(channel); 49 } 50 void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue); 51 52 #define EFX_MAX_DMAQ_SIZE 4096UL 53 #define EFX_DEFAULT_DMAQ_SIZE 1024UL 54 #define EFX_MIN_DMAQ_SIZE 512UL 55 56 #define EFX_MAX_EVQ_SIZE 16384UL 57 #define EFX_MIN_EVQ_SIZE 512UL 58 59 /* Maximum number of TCP segments we support for soft-TSO */ 60 #define EFX_TSO_MAX_SEGS 100 61 62 /* The smallest [rt]xq_entries that the driver supports. RX minimum 63 * is a bit arbitrary. For TX, we must have space for at least 2 64 * TSO skbs. 65 */ 66 #define EFX_RXQ_MIN_ENT 128U 67 #define EFX_TXQ_MIN_ENT(efx) (2 * efx_tx_max_skb_descs(efx)) 68 69 #define EFX_TXQ_MAX_ENT(efx) (EFX_WORKAROUND_35388(efx) ? \ 70 EFX_MAX_DMAQ_SIZE / 2 : EFX_MAX_DMAQ_SIZE) 71 72 /* Filters */ 73 74 /** 75 * efx_filter_insert_filter - add or replace a filter 76 * @efx: NIC in which to insert the filter 77 * @spec: Specification for the filter 78 * @replace_equal: Flag for whether the specified filter may replace an 79 * existing filter with equal priority 80 * 81 * On success, return the filter ID. 82 * On failure, return a negative error code. 83 * 84 * If existing filters have equal match values to the new filter spec, 85 * then the new filter might replace them or the function might fail, 86 * as follows. 87 * 88 * 1. If the existing filters have lower priority, or @replace_equal 89 * is set and they have equal priority, replace them. 90 * 91 * 2. If the existing filters have higher priority, return -%EPERM. 92 * 93 * 3. If !efx_filter_is_mc_recipient(@spec), or the NIC does not 94 * support delivery to multiple recipients, return -%EEXIST. 95 * 96 * This implies that filters for multiple multicast recipients must 97 * all be inserted with the same priority and @replace_equal = %false. 98 */ 99 static inline s32 efx_filter_insert_filter(struct efx_nic *efx, 100 struct efx_filter_spec *spec, 101 bool replace_equal) 102 { 103 return efx->type->filter_insert(efx, spec, replace_equal); 104 } 105 106 /** 107 * efx_filter_remove_id_safe - remove a filter by ID, carefully 108 * @efx: NIC from which to remove the filter 109 * @priority: Priority of filter, as passed to @efx_filter_insert_filter 110 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter 111 * 112 * This function will range-check @filter_id, so it is safe to call 113 * with a value passed from userland. 114 */ 115 static inline int efx_filter_remove_id_safe(struct efx_nic *efx, 116 enum efx_filter_priority priority, 117 u32 filter_id) 118 { 119 return efx->type->filter_remove_safe(efx, priority, filter_id); 120 } 121 122 /** 123 * efx_filter_get_filter_safe - retrieve a filter by ID, carefully 124 * @efx: NIC from which to remove the filter 125 * @priority: Priority of filter, as passed to @efx_filter_insert_filter 126 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter 127 * @spec: Buffer in which to store filter specification 128 * 129 * This function will range-check @filter_id, so it is safe to call 130 * with a value passed from userland. 131 */ 132 static inline int 133 efx_filter_get_filter_safe(struct efx_nic *efx, 134 enum efx_filter_priority priority, 135 u32 filter_id, struct efx_filter_spec *spec) 136 { 137 return efx->type->filter_get_safe(efx, priority, filter_id, spec); 138 } 139 140 static inline u32 efx_filter_count_rx_used(struct efx_nic *efx, 141 enum efx_filter_priority priority) 142 { 143 return efx->type->filter_count_rx_used(efx, priority); 144 } 145 static inline u32 efx_filter_get_rx_id_limit(struct efx_nic *efx) 146 { 147 return efx->type->filter_get_rx_id_limit(efx); 148 } 149 static inline s32 efx_filter_get_rx_ids(struct efx_nic *efx, 150 enum efx_filter_priority priority, 151 u32 *buf, u32 size) 152 { 153 return efx->type->filter_get_rx_ids(efx, priority, buf, size); 154 } 155 #ifdef CONFIG_RFS_ACCEL 156 int efx_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb, 157 u16 rxq_index, u32 flow_id); 158 bool __efx_filter_rfs_expire(struct efx_nic *efx, unsigned quota); 159 static inline void efx_filter_rfs_expire(struct efx_channel *channel) 160 { 161 if (channel->rfs_filters_added >= 60 && 162 __efx_filter_rfs_expire(channel->efx, 100)) 163 channel->rfs_filters_added -= 60; 164 } 165 #define efx_filter_rfs_enabled() 1 166 #else 167 static inline void efx_filter_rfs_expire(struct efx_channel *channel) {} 168 #define efx_filter_rfs_enabled() 0 169 #endif 170 bool efx_filter_is_mc_recipient(const struct efx_filter_spec *spec); 171 172 /* Channels */ 173 int efx_channel_dummy_op_int(struct efx_channel *channel); 174 void efx_channel_dummy_op_void(struct efx_channel *channel); 175 int efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries); 176 177 /* Ports */ 178 int efx_reconfigure_port(struct efx_nic *efx); 179 int __efx_reconfigure_port(struct efx_nic *efx); 180 181 /* Ethtool support */ 182 extern const struct ethtool_ops efx_ethtool_ops; 183 184 /* Reset handling */ 185 int efx_reset(struct efx_nic *efx, enum reset_type method); 186 void efx_reset_down(struct efx_nic *efx, enum reset_type method); 187 int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok); 188 int efx_try_recovery(struct efx_nic *efx); 189 190 /* Global */ 191 void efx_schedule_reset(struct efx_nic *efx, enum reset_type type); 192 int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs, 193 unsigned int rx_usecs, bool rx_adaptive, 194 bool rx_may_override_tx); 195 void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs, 196 unsigned int *rx_usecs, bool *rx_adaptive); 197 void efx_stop_eventq(struct efx_channel *channel); 198 void efx_start_eventq(struct efx_channel *channel); 199 200 /* Dummy PHY ops for PHY drivers */ 201 int efx_port_dummy_op_int(struct efx_nic *efx); 202 void efx_port_dummy_op_void(struct efx_nic *efx); 203 204 /* Update the generic software stats in the passed stats array */ 205 void efx_update_sw_stats(struct efx_nic *efx, u64 *stats); 206 207 /* MTD */ 208 #ifdef CONFIG_SFC_MTD 209 int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts, 210 size_t n_parts, size_t sizeof_part); 211 static inline int efx_mtd_probe(struct efx_nic *efx) 212 { 213 return efx->type->mtd_probe(efx); 214 } 215 void efx_mtd_rename(struct efx_nic *efx); 216 void efx_mtd_remove(struct efx_nic *efx); 217 #else 218 static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; } 219 static inline void efx_mtd_rename(struct efx_nic *efx) {} 220 static inline void efx_mtd_remove(struct efx_nic *efx) {} 221 #endif 222 223 static inline void efx_schedule_channel(struct efx_channel *channel) 224 { 225 netif_vdbg(channel->efx, intr, channel->efx->net_dev, 226 "channel %d scheduling NAPI poll on CPU%d\n", 227 channel->channel, raw_smp_processor_id()); 228 229 napi_schedule(&channel->napi_str); 230 } 231 232 static inline void efx_schedule_channel_irq(struct efx_channel *channel) 233 { 234 channel->event_test_cpu = raw_smp_processor_id(); 235 efx_schedule_channel(channel); 236 } 237 238 void efx_link_status_changed(struct efx_nic *efx); 239 void efx_link_set_advertising(struct efx_nic *efx, u32); 240 void efx_link_set_wanted_fc(struct efx_nic *efx, u8); 241 242 static inline void efx_device_detach_sync(struct efx_nic *efx) 243 { 244 struct net_device *dev = efx->net_dev; 245 246 /* Lock/freeze all TX queues so that we can be sure the 247 * TX scheduler is stopped when we're done and before 248 * netif_device_present() becomes false. 249 */ 250 netif_tx_lock_bh(dev); 251 netif_device_detach(dev); 252 netif_tx_unlock_bh(dev); 253 } 254 255 #endif /* EFX_EFX_H */ 256