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 extern int efx_probe_tx_queue(struct efx_tx_queue *tx_queue); 22 extern void efx_remove_tx_queue(struct efx_tx_queue *tx_queue); 23 extern void efx_init_tx_queue(struct efx_tx_queue *tx_queue); 24 extern void efx_init_tx_queue_core_txq(struct efx_tx_queue *tx_queue); 25 extern void efx_fini_tx_queue(struct efx_tx_queue *tx_queue); 26 extern netdev_tx_t 27 efx_hard_start_xmit(struct sk_buff *skb, struct net_device *net_dev); 28 extern netdev_tx_t 29 efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb); 30 extern void efx_xmit_done(struct efx_tx_queue *tx_queue, unsigned int index); 31 extern int efx_setup_tc(struct net_device *net_dev, u8 num_tc); 32 extern unsigned int efx_tx_max_skb_descs(struct efx_nic *efx); 33 34 /* RX */ 35 extern void efx_rx_config_page_split(struct efx_nic *efx); 36 extern int efx_probe_rx_queue(struct efx_rx_queue *rx_queue); 37 extern void efx_remove_rx_queue(struct efx_rx_queue *rx_queue); 38 extern void efx_init_rx_queue(struct efx_rx_queue *rx_queue); 39 extern void efx_fini_rx_queue(struct efx_rx_queue *rx_queue); 40 extern void efx_fast_push_rx_descriptors(struct efx_rx_queue *rx_queue); 41 extern void efx_rx_slow_fill(unsigned long context); 42 extern void __efx_rx_packet(struct efx_channel *channel); 43 extern void efx_rx_packet(struct efx_rx_queue *rx_queue, 44 unsigned int index, unsigned int n_frags, 45 unsigned int len, u16 flags); 46 static inline void efx_rx_flush_packet(struct efx_channel *channel) 47 { 48 if (channel->rx_pkt_n_frags) 49 __efx_rx_packet(channel); 50 } 51 extern void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue); 52 53 #define EFX_MAX_DMAQ_SIZE 4096UL 54 #define EFX_DEFAULT_DMAQ_SIZE 1024UL 55 #define EFX_MIN_DMAQ_SIZE 512UL 56 57 #define EFX_MAX_EVQ_SIZE 16384UL 58 #define EFX_MIN_EVQ_SIZE 512UL 59 60 /* Maximum number of TCP segments we support for soft-TSO */ 61 #define EFX_TSO_MAX_SEGS 100 62 63 /* The smallest [rt]xq_entries that the driver supports. RX minimum 64 * is a bit arbitrary. For TX, we must have space for at least 2 65 * TSO skbs. 66 */ 67 #define EFX_RXQ_MIN_ENT 128U 68 #define EFX_TXQ_MIN_ENT(efx) (2 * efx_tx_max_skb_descs(efx)) 69 70 /* Filters */ 71 72 /** 73 * efx_filter_insert_filter - add or replace a filter 74 * @efx: NIC in which to insert the filter 75 * @spec: Specification for the filter 76 * @replace_equal: Flag for whether the specified filter may replace an 77 * existing filter with equal priority 78 * 79 * On success, return the filter ID. 80 * On failure, return a negative error code. 81 * 82 * If existing filters have equal match values to the new filter spec, 83 * then the new filter might replace them or the function might fail, 84 * as follows. 85 * 86 * 1. If the existing filters have lower priority, or @replace_equal 87 * is set and they have equal priority, replace them. 88 * 89 * 2. If the existing filters have higher priority, return -%EPERM. 90 * 91 * 3. If !efx_filter_is_mc_recipient(@spec), or the NIC does not 92 * support delivery to multiple recipients, return -%EEXIST. 93 * 94 * This implies that filters for multiple multicast recipients must 95 * all be inserted with the same priority and @replace_equal = %false. 96 */ 97 static inline s32 efx_filter_insert_filter(struct efx_nic *efx, 98 struct efx_filter_spec *spec, 99 bool replace_equal) 100 { 101 return efx->type->filter_insert(efx, spec, replace_equal); 102 } 103 104 /** 105 * efx_filter_remove_id_safe - remove a filter by ID, carefully 106 * @efx: NIC from which to remove the filter 107 * @priority: Priority of filter, as passed to @efx_filter_insert_filter 108 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter 109 * 110 * This function will range-check @filter_id, so it is safe to call 111 * with a value passed from userland. 112 */ 113 static inline int efx_filter_remove_id_safe(struct efx_nic *efx, 114 enum efx_filter_priority priority, 115 u32 filter_id) 116 { 117 return efx->type->filter_remove_safe(efx, priority, filter_id); 118 } 119 120 /** 121 * efx_filter_get_filter_safe - retrieve a filter by ID, carefully 122 * @efx: NIC from which to remove the filter 123 * @priority: Priority of filter, as passed to @efx_filter_insert_filter 124 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter 125 * @spec: Buffer in which to store filter specification 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 131 efx_filter_get_filter_safe(struct efx_nic *efx, 132 enum efx_filter_priority priority, 133 u32 filter_id, struct efx_filter_spec *spec) 134 { 135 return efx->type->filter_get_safe(efx, priority, filter_id, spec); 136 } 137 138 /** 139 * efx_farch_filter_clear_rx - remove RX filters by priority 140 * @efx: NIC from which to remove the filters 141 * @priority: Maximum priority to remove 142 */ 143 static inline void efx_filter_clear_rx(struct efx_nic *efx, 144 enum efx_filter_priority priority) 145 { 146 return efx->type->filter_clear_rx(efx, priority); 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 extern int efx_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb, 166 u16 rxq_index, u32 flow_id); 167 extern 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 extern bool efx_filter_is_mc_recipient(const struct efx_filter_spec *spec); 180 181 /* Channels */ 182 extern int efx_channel_dummy_op_int(struct efx_channel *channel); 183 extern void efx_channel_dummy_op_void(struct efx_channel *channel); 184 extern int 185 efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries); 186 187 /* Ports */ 188 extern int efx_reconfigure_port(struct efx_nic *efx); 189 extern int __efx_reconfigure_port(struct efx_nic *efx); 190 191 /* Ethtool support */ 192 extern const struct ethtool_ops efx_ethtool_ops; 193 194 /* Reset handling */ 195 extern int efx_reset(struct efx_nic *efx, enum reset_type method); 196 extern void efx_reset_down(struct efx_nic *efx, enum reset_type method); 197 extern int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok); 198 extern int efx_try_recovery(struct efx_nic *efx); 199 200 /* Global */ 201 extern void efx_schedule_reset(struct efx_nic *efx, enum reset_type type); 202 extern int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs, 203 unsigned int rx_usecs, bool rx_adaptive, 204 bool rx_may_override_tx); 205 extern void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs, 206 unsigned int *rx_usecs, bool *rx_adaptive); 207 208 /* Dummy PHY ops for PHY drivers */ 209 extern int efx_port_dummy_op_int(struct efx_nic *efx); 210 extern void efx_port_dummy_op_void(struct efx_nic *efx); 211 212 213 /* MTD */ 214 #ifdef CONFIG_SFC_MTD 215 extern int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts, 216 size_t n_parts, size_t sizeof_part); 217 static inline int efx_mtd_probe(struct efx_nic *efx) 218 { 219 return efx->type->mtd_probe(efx); 220 } 221 extern void efx_mtd_rename(struct efx_nic *efx); 222 extern void efx_mtd_remove(struct efx_nic *efx); 223 #else 224 static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; } 225 static inline void efx_mtd_rename(struct efx_nic *efx) {} 226 static inline void efx_mtd_remove(struct efx_nic *efx) {} 227 #endif 228 229 static inline void efx_schedule_channel(struct efx_channel *channel) 230 { 231 netif_vdbg(channel->efx, intr, channel->efx->net_dev, 232 "channel %d scheduling NAPI poll on CPU%d\n", 233 channel->channel, raw_smp_processor_id()); 234 235 napi_schedule(&channel->napi_str); 236 } 237 238 static inline void efx_schedule_channel_irq(struct efx_channel *channel) 239 { 240 channel->event_test_cpu = raw_smp_processor_id(); 241 efx_schedule_channel(channel); 242 } 243 244 extern void efx_link_status_changed(struct efx_nic *efx); 245 extern void efx_link_set_advertising(struct efx_nic *efx, u32); 246 extern void efx_link_set_wanted_fc(struct efx_nic *efx, u8); 247 248 static inline void efx_device_detach_sync(struct efx_nic *efx) 249 { 250 struct net_device *dev = efx->net_dev; 251 252 /* Lock/freeze all TX queues so that we can be sure the 253 * TX scheduler is stopped when we're done and before 254 * netif_device_present() becomes false. 255 */ 256 netif_tx_lock_bh(dev); 257 netif_device_detach(dev); 258 netif_tx_unlock_bh(dev); 259 } 260 261 #endif /* EFX_EFX_H */ 262