1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /**************************************************************************** 3 * Driver for Solarflare network controllers and boards 4 * Copyright 2005-2006 Fen Systems Ltd. 5 * Copyright 2006-2013 Solarflare Communications Inc. 6 */ 7 8 #ifndef EFX_EFX_H 9 #define EFX_EFX_H 10 11 #include "net_driver.h" 12 #include "filter.h" 13 14 int efx_net_open(struct net_device *net_dev); 15 int efx_net_stop(struct net_device *net_dev); 16 17 /* TX */ 18 void efx_init_tx_queue_core_txq(struct efx_tx_queue *tx_queue); 19 netdev_tx_t efx_hard_start_xmit(struct sk_buff *skb, 20 struct net_device *net_dev); 21 netdev_tx_t efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb); 22 void efx_xmit_done(struct efx_tx_queue *tx_queue, unsigned int index); 23 void efx_xmit_done_single(struct efx_tx_queue *tx_queue); 24 int efx_setup_tc(struct net_device *net_dev, enum tc_setup_type type, 25 void *type_data); 26 extern unsigned int efx_piobuf_size; 27 extern bool efx_separate_tx_channels; 28 29 /* RX */ 30 void __efx_rx_packet(struct efx_channel *channel); 31 void efx_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index, 32 unsigned int n_frags, unsigned int len, u16 flags); 33 static inline void efx_rx_flush_packet(struct efx_channel *channel) 34 { 35 if (channel->rx_pkt_n_frags) 36 __efx_rx_packet(channel); 37 } 38 39 #define EFX_MAX_DMAQ_SIZE 4096UL 40 #define EFX_DEFAULT_DMAQ_SIZE 1024UL 41 #define EFX_MIN_DMAQ_SIZE 512UL 42 43 #define EFX_MAX_EVQ_SIZE 16384UL 44 #define EFX_MIN_EVQ_SIZE 512UL 45 46 /* Maximum number of TCP segments we support for soft-TSO */ 47 #define EFX_TSO_MAX_SEGS 100 48 49 /* The smallest [rt]xq_entries that the driver supports. RX minimum 50 * is a bit arbitrary. For TX, we must have space for at least 2 51 * TSO skbs. 52 */ 53 #define EFX_RXQ_MIN_ENT 128U 54 #define EFX_TXQ_MIN_ENT(efx) (2 * efx_tx_max_skb_descs(efx)) 55 56 /* All EF10 architecture NICs steal one bit of the DMAQ size for various 57 * other purposes when counting TxQ entries, so we halve the queue size. 58 */ 59 #define EFX_TXQ_MAX_ENT(efx) (EFX_WORKAROUND_EF10(efx) ? \ 60 EFX_MAX_DMAQ_SIZE / 2 : EFX_MAX_DMAQ_SIZE) 61 62 static inline bool efx_rss_enabled(struct efx_nic *efx) 63 { 64 return efx->rss_spread > 1; 65 } 66 67 /* Filters */ 68 69 /** 70 * efx_filter_insert_filter - add or replace a filter 71 * @efx: NIC in which to insert the filter 72 * @spec: Specification for the filter 73 * @replace_equal: Flag for whether the specified filter may replace an 74 * existing filter with equal priority 75 * 76 * On success, return the filter ID. 77 * On failure, return a negative error code. 78 * 79 * If existing filters have equal match values to the new filter spec, 80 * then the new filter might replace them or the function might fail, 81 * as follows. 82 * 83 * 1. If the existing filters have lower priority, or @replace_equal 84 * is set and they have equal priority, replace them. 85 * 86 * 2. If the existing filters have higher priority, return -%EPERM. 87 * 88 * 3. If !efx_filter_is_mc_recipient(@spec), or the NIC does not 89 * support delivery to multiple recipients, return -%EEXIST. 90 * 91 * This implies that filters for multiple multicast recipients must 92 * all be inserted with the same priority and @replace_equal = %false. 93 */ 94 static inline s32 efx_filter_insert_filter(struct efx_nic *efx, 95 struct efx_filter_spec *spec, 96 bool replace_equal) 97 { 98 return efx->type->filter_insert(efx, spec, replace_equal); 99 } 100 101 /** 102 * efx_filter_remove_id_safe - remove a filter by ID, carefully 103 * @efx: NIC from which to remove the filter 104 * @priority: Priority of filter, as passed to @efx_filter_insert_filter 105 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter 106 * 107 * This function will range-check @filter_id, so it is safe to call 108 * with a value passed from userland. 109 */ 110 static inline int efx_filter_remove_id_safe(struct efx_nic *efx, 111 enum efx_filter_priority priority, 112 u32 filter_id) 113 { 114 return efx->type->filter_remove_safe(efx, priority, filter_id); 115 } 116 117 /** 118 * efx_filter_get_filter_safe - retrieve a filter by ID, carefully 119 * @efx: NIC from which to remove the filter 120 * @priority: Priority of filter, as passed to @efx_filter_insert_filter 121 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter 122 * @spec: Buffer in which to store filter specification 123 * 124 * This function will range-check @filter_id, so it is safe to call 125 * with a value passed from userland. 126 */ 127 static inline int 128 efx_filter_get_filter_safe(struct efx_nic *efx, 129 enum efx_filter_priority priority, 130 u32 filter_id, struct efx_filter_spec *spec) 131 { 132 return efx->type->filter_get_safe(efx, priority, filter_id, spec); 133 } 134 135 static inline u32 efx_filter_count_rx_used(struct efx_nic *efx, 136 enum efx_filter_priority priority) 137 { 138 return efx->type->filter_count_rx_used(efx, priority); 139 } 140 static inline u32 efx_filter_get_rx_id_limit(struct efx_nic *efx) 141 { 142 return efx->type->filter_get_rx_id_limit(efx); 143 } 144 static inline s32 efx_filter_get_rx_ids(struct efx_nic *efx, 145 enum efx_filter_priority priority, 146 u32 *buf, u32 size) 147 { 148 return efx->type->filter_get_rx_ids(efx, priority, buf, size); 149 } 150 #ifdef CONFIG_RFS_ACCEL 151 int efx_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb, 152 u16 rxq_index, u32 flow_id); 153 bool __efx_filter_rfs_expire(struct efx_channel *channel, unsigned int quota); 154 #endif 155 156 /* RSS contexts */ 157 static inline bool efx_rss_active(struct efx_rss_context *ctx) 158 { 159 return ctx->context_id != EFX_MCDI_RSS_CONTEXT_INVALID; 160 } 161 162 /* Ethtool support */ 163 extern const struct ethtool_ops efx_ethtool_ops; 164 165 /* Global */ 166 unsigned int efx_usecs_to_ticks(struct efx_nic *efx, unsigned int usecs); 167 unsigned int efx_ticks_to_usecs(struct efx_nic *efx, unsigned int ticks); 168 int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs, 169 unsigned int rx_usecs, bool rx_adaptive, 170 bool rx_may_override_tx); 171 void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs, 172 unsigned int *rx_usecs, bool *rx_adaptive); 173 174 /* Dummy PHY ops for PHY drivers */ 175 int efx_port_dummy_op_int(struct efx_nic *efx); 176 void efx_port_dummy_op_void(struct efx_nic *efx); 177 178 /* Update the generic software stats in the passed stats array */ 179 void efx_update_sw_stats(struct efx_nic *efx, u64 *stats); 180 181 /* MTD */ 182 #ifdef CONFIG_SFC_MTD 183 int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts, 184 size_t n_parts, size_t sizeof_part); 185 static inline int efx_mtd_probe(struct efx_nic *efx) 186 { 187 return efx->type->mtd_probe(efx); 188 } 189 void efx_mtd_rename(struct efx_nic *efx); 190 void efx_mtd_remove(struct efx_nic *efx); 191 #else 192 static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; } 193 static inline void efx_mtd_rename(struct efx_nic *efx) {} 194 static inline void efx_mtd_remove(struct efx_nic *efx) {} 195 #endif 196 197 #ifdef CONFIG_SFC_SRIOV 198 static inline unsigned int efx_vf_size(struct efx_nic *efx) 199 { 200 return 1 << efx->vi_scale; 201 } 202 #endif 203 204 static inline void efx_schedule_channel(struct efx_channel *channel) 205 { 206 netif_vdbg(channel->efx, intr, channel->efx->net_dev, 207 "channel %d scheduling NAPI poll on CPU%d\n", 208 channel->channel, raw_smp_processor_id()); 209 210 napi_schedule(&channel->napi_str); 211 } 212 213 static inline void efx_schedule_channel_irq(struct efx_channel *channel) 214 { 215 channel->event_test_cpu = raw_smp_processor_id(); 216 efx_schedule_channel(channel); 217 } 218 219 void efx_link_clear_advertising(struct efx_nic *efx); 220 void efx_link_set_wanted_fc(struct efx_nic *efx, u8); 221 222 static inline void efx_device_detach_sync(struct efx_nic *efx) 223 { 224 struct net_device *dev = efx->net_dev; 225 226 /* Lock/freeze all TX queues so that we can be sure the 227 * TX scheduler is stopped when we're done and before 228 * netif_device_present() becomes false. 229 */ 230 netif_tx_lock_bh(dev); 231 netif_device_detach(dev); 232 netif_tx_unlock_bh(dev); 233 } 234 235 static inline void efx_device_attach_if_not_resetting(struct efx_nic *efx) 236 { 237 if ((efx->state != STATE_DISABLED) && !efx->reset_pending) 238 netif_device_attach(efx->net_dev); 239 } 240 241 static inline bool efx_rwsem_assert_write_locked(struct rw_semaphore *sem) 242 { 243 if (WARN_ON(down_read_trylock(sem))) { 244 up_read(sem); 245 return false; 246 } 247 return true; 248 } 249 250 int efx_xdp_tx_buffers(struct efx_nic *efx, int n, struct xdp_frame **xdpfs, 251 bool flush); 252 253 #endif /* EFX_EFX_H */ 254