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 /* Solarstorm 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 /* Filters */ 70 71 /** 72 * efx_filter_insert_filter - add or replace a filter 73 * @efx: NIC in which to insert the filter 74 * @spec: Specification for the filter 75 * @replace_equal: Flag for whether the specified filter may replace an 76 * existing filter with equal priority 77 * 78 * On success, return the filter ID. 79 * On failure, return a negative error code. 80 * 81 * If existing filters have equal match values to the new filter spec, 82 * then the new filter might replace them or the function might fail, 83 * as follows. 84 * 85 * 1. If the existing filters have lower priority, or @replace_equal 86 * is set and they have equal priority, replace them. 87 * 88 * 2. If the existing filters have higher priority, return -%EPERM. 89 * 90 * 3. If !efx_filter_is_mc_recipient(@spec), or the NIC does not 91 * support delivery to multiple recipients, return -%EEXIST. 92 * 93 * This implies that filters for multiple multicast recipients must 94 * all be inserted with the same priority and @replace_equal = %false. 95 */ 96 static inline s32 efx_filter_insert_filter(struct efx_nic *efx, 97 struct efx_filter_spec *spec, 98 bool replace_equal) 99 { 100 return efx->type->filter_insert(efx, spec, replace_equal); 101 } 102 103 /** 104 * efx_filter_remove_id_safe - remove a filter by ID, carefully 105 * @efx: NIC from which to remove the filter 106 * @priority: Priority of filter, as passed to @efx_filter_insert_filter 107 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter 108 * 109 * This function will range-check @filter_id, so it is safe to call 110 * with a value passed from userland. 111 */ 112 static inline int efx_filter_remove_id_safe(struct efx_nic *efx, 113 enum efx_filter_priority priority, 114 u32 filter_id) 115 { 116 return efx->type->filter_remove_safe(efx, priority, filter_id); 117 } 118 119 /** 120 * efx_filter_get_filter_safe - retrieve a filter by ID, carefully 121 * @efx: NIC from which to remove the filter 122 * @priority: Priority of filter, as passed to @efx_filter_insert_filter 123 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter 124 * @spec: Buffer in which to store filter specification 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 130 efx_filter_get_filter_safe(struct efx_nic *efx, 131 enum efx_filter_priority priority, 132 u32 filter_id, struct efx_filter_spec *spec) 133 { 134 return efx->type->filter_get_safe(efx, priority, filter_id, spec); 135 } 136 137 static inline u32 efx_filter_count_rx_used(struct efx_nic *efx, 138 enum efx_filter_priority priority) 139 { 140 return efx->type->filter_count_rx_used(efx, priority); 141 } 142 static inline u32 efx_filter_get_rx_id_limit(struct efx_nic *efx) 143 { 144 return efx->type->filter_get_rx_id_limit(efx); 145 } 146 static inline s32 efx_filter_get_rx_ids(struct efx_nic *efx, 147 enum efx_filter_priority priority, 148 u32 *buf, u32 size) 149 { 150 return efx->type->filter_get_rx_ids(efx, priority, buf, size); 151 } 152 #ifdef CONFIG_RFS_ACCEL 153 int efx_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb, 154 u16 rxq_index, u32 flow_id); 155 bool __efx_filter_rfs_expire(struct efx_nic *efx, unsigned quota); 156 static inline void efx_filter_rfs_expire(struct efx_channel *channel) 157 { 158 if (channel->rfs_filters_added >= 60 && 159 __efx_filter_rfs_expire(channel->efx, 100)) 160 channel->rfs_filters_added -= 60; 161 } 162 #define efx_filter_rfs_enabled() 1 163 #else 164 static inline void efx_filter_rfs_expire(struct efx_channel *channel) {} 165 #define efx_filter_rfs_enabled() 0 166 #endif 167 bool efx_filter_is_mc_recipient(const struct efx_filter_spec *spec); 168 169 /* Channels */ 170 int efx_channel_dummy_op_int(struct efx_channel *channel); 171 void efx_channel_dummy_op_void(struct efx_channel *channel); 172 int efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries); 173 174 /* Ports */ 175 int efx_reconfigure_port(struct efx_nic *efx); 176 int __efx_reconfigure_port(struct efx_nic *efx); 177 178 /* Ethtool support */ 179 extern const struct ethtool_ops efx_ethtool_ops; 180 181 /* Reset handling */ 182 int efx_reset(struct efx_nic *efx, enum reset_type method); 183 void efx_reset_down(struct efx_nic *efx, enum reset_type method); 184 int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok); 185 int efx_try_recovery(struct efx_nic *efx); 186 187 /* Global */ 188 void efx_schedule_reset(struct efx_nic *efx, enum reset_type type); 189 int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs, 190 unsigned int rx_usecs, bool rx_adaptive, 191 bool rx_may_override_tx); 192 void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs, 193 unsigned int *rx_usecs, bool *rx_adaptive); 194 195 /* Dummy PHY ops for PHY drivers */ 196 int efx_port_dummy_op_int(struct efx_nic *efx); 197 void efx_port_dummy_op_void(struct efx_nic *efx); 198 199 /* MTD */ 200 #ifdef CONFIG_SFC_MTD 201 int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts, 202 size_t n_parts, size_t sizeof_part); 203 static inline int efx_mtd_probe(struct efx_nic *efx) 204 { 205 return efx->type->mtd_probe(efx); 206 } 207 void efx_mtd_rename(struct efx_nic *efx); 208 void efx_mtd_remove(struct efx_nic *efx); 209 #else 210 static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; } 211 static inline void efx_mtd_rename(struct efx_nic *efx) {} 212 static inline void efx_mtd_remove(struct efx_nic *efx) {} 213 #endif 214 215 static inline void efx_schedule_channel(struct efx_channel *channel) 216 { 217 netif_vdbg(channel->efx, intr, channel->efx->net_dev, 218 "channel %d scheduling NAPI poll on CPU%d\n", 219 channel->channel, raw_smp_processor_id()); 220 221 napi_schedule(&channel->napi_str); 222 } 223 224 static inline void efx_schedule_channel_irq(struct efx_channel *channel) 225 { 226 channel->event_test_cpu = raw_smp_processor_id(); 227 efx_schedule_channel(channel); 228 } 229 230 void efx_link_status_changed(struct efx_nic *efx); 231 void efx_link_set_advertising(struct efx_nic *efx, u32); 232 void efx_link_set_wanted_fc(struct efx_nic *efx, u8); 233 234 static inline void efx_device_detach_sync(struct efx_nic *efx) 235 { 236 struct net_device *dev = efx->net_dev; 237 238 /* Lock/freeze all TX queues so that we can be sure the 239 * TX scheduler is stopped when we're done and before 240 * netif_device_present() becomes false. 241 */ 242 netif_tx_lock_bh(dev); 243 netif_device_detach(dev); 244 netif_tx_unlock_bh(dev); 245 } 246 247 #endif /* EFX_EFX_H */ 248