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 <linux/indirect_call_wrapper.h> 12 #include "net_driver.h" 13 #include "ef100_rx.h" 14 #include "ef100_tx.h" 15 #include "filter.h" 16 17 int efx_net_open(struct net_device *net_dev); 18 int efx_net_stop(struct net_device *net_dev); 19 20 /* TX */ 21 void efx_init_tx_queue_core_txq(struct efx_tx_queue *tx_queue); 22 netdev_tx_t efx_hard_start_xmit(struct sk_buff *skb, 23 struct net_device *net_dev); 24 netdev_tx_t __efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb); 25 static inline netdev_tx_t efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb) 26 { 27 return INDIRECT_CALL_2(tx_queue->efx->type->tx_enqueue, 28 ef100_enqueue_skb, __efx_enqueue_skb, 29 tx_queue, skb); 30 } 31 void efx_xmit_done_single(struct efx_tx_queue *tx_queue); 32 int efx_setup_tc(struct net_device *net_dev, enum tc_setup_type type, 33 void *type_data); 34 extern unsigned int efx_piobuf_size; 35 36 /* RX */ 37 void __efx_rx_packet(struct efx_channel *channel); 38 void efx_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index, 39 unsigned int n_frags, unsigned int len, u16 flags); 40 static inline void efx_rx_flush_packet(struct efx_channel *channel) 41 { 42 if (channel->rx_pkt_n_frags) 43 INDIRECT_CALL_2(channel->efx->type->rx_packet, 44 __ef100_rx_packet, __efx_rx_packet, 45 channel); 46 } 47 static inline bool efx_rx_buf_hash_valid(struct efx_nic *efx, const u8 *prefix) 48 { 49 if (efx->type->rx_buf_hash_valid) 50 return INDIRECT_CALL_1(efx->type->rx_buf_hash_valid, 51 ef100_rx_buf_hash_valid, 52 prefix); 53 return true; 54 } 55 56 /* Maximum number of TCP segments we support for soft-TSO */ 57 #define EFX_TSO_MAX_SEGS 100 58 59 /* The smallest [rt]xq_entries that the driver supports. RX minimum 60 * is a bit arbitrary. For TX, we must have space for at least 2 61 * TSO skbs. 62 */ 63 #define EFX_RXQ_MIN_ENT 128U 64 #define EFX_TXQ_MIN_ENT(efx) (2 * efx_tx_max_skb_descs(efx)) 65 66 /* All EF10 architecture NICs steal one bit of the DMAQ size for various 67 * other purposes when counting TxQ entries, so we halve the queue size. 68 */ 69 #define EFX_TXQ_MAX_ENT(efx) (EFX_WORKAROUND_EF10(efx) ? \ 70 EFX_MAX_DMAQ_SIZE / 2 : EFX_MAX_DMAQ_SIZE) 71 72 static inline bool efx_rss_enabled(struct efx_nic *efx) 73 { 74 return efx->rss_spread > 1; 75 } 76 77 /* Filters */ 78 79 /** 80 * efx_filter_insert_filter - add or replace a filter 81 * @efx: NIC in which to insert the filter 82 * @spec: Specification for the filter 83 * @replace_equal: Flag for whether the specified filter may replace an 84 * existing filter with equal priority 85 * 86 * On success, return the filter ID. 87 * On failure, return a negative error code. 88 * 89 * If existing filters have equal match values to the new filter spec, 90 * then the new filter might replace them or the function might fail, 91 * as follows. 92 * 93 * 1. If the existing filters have lower priority, or @replace_equal 94 * is set and they have equal priority, replace them. 95 * 96 * 2. If the existing filters have higher priority, return -%EPERM. 97 * 98 * 3. If !efx_filter_is_mc_recipient(@spec), or the NIC does not 99 * support delivery to multiple recipients, return -%EEXIST. 100 * 101 * This implies that filters for multiple multicast recipients must 102 * all be inserted with the same priority and @replace_equal = %false. 103 */ 104 static inline s32 efx_filter_insert_filter(struct efx_nic *efx, 105 struct efx_filter_spec *spec, 106 bool replace_equal) 107 { 108 return efx->type->filter_insert(efx, spec, replace_equal); 109 } 110 111 /** 112 * efx_filter_remove_id_safe - remove a filter by ID, carefully 113 * @efx: NIC from which to remove the filter 114 * @priority: Priority of filter, as passed to @efx_filter_insert_filter 115 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter 116 * 117 * This function will range-check @filter_id, so it is safe to call 118 * with a value passed from userland. 119 */ 120 static inline int efx_filter_remove_id_safe(struct efx_nic *efx, 121 enum efx_filter_priority priority, 122 u32 filter_id) 123 { 124 return efx->type->filter_remove_safe(efx, priority, filter_id); 125 } 126 127 /** 128 * efx_filter_get_filter_safe - retrieve a filter by ID, carefully 129 * @efx: NIC from which to remove the filter 130 * @priority: Priority of filter, as passed to @efx_filter_insert_filter 131 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter 132 * @spec: Buffer in which to store filter specification 133 * 134 * This function will range-check @filter_id, so it is safe to call 135 * with a value passed from userland. 136 */ 137 static inline int 138 efx_filter_get_filter_safe(struct efx_nic *efx, 139 enum efx_filter_priority priority, 140 u32 filter_id, struct efx_filter_spec *spec) 141 { 142 return efx->type->filter_get_safe(efx, priority, filter_id, spec); 143 } 144 145 static inline u32 efx_filter_count_rx_used(struct efx_nic *efx, 146 enum efx_filter_priority priority) 147 { 148 return efx->type->filter_count_rx_used(efx, priority); 149 } 150 static inline u32 efx_filter_get_rx_id_limit(struct efx_nic *efx) 151 { 152 return efx->type->filter_get_rx_id_limit(efx); 153 } 154 static inline s32 efx_filter_get_rx_ids(struct efx_nic *efx, 155 enum efx_filter_priority priority, 156 u32 *buf, u32 size) 157 { 158 return efx->type->filter_get_rx_ids(efx, priority, buf, size); 159 } 160 161 /* RSS contexts */ 162 static inline bool efx_rss_active(struct efx_rss_context *ctx) 163 { 164 return ctx->context_id != EFX_MCDI_RSS_CONTEXT_INVALID; 165 } 166 167 /* Ethtool support */ 168 extern const struct ethtool_ops efx_ethtool_ops; 169 170 /* Global */ 171 unsigned int efx_usecs_to_ticks(struct efx_nic *efx, unsigned int usecs); 172 unsigned int efx_ticks_to_usecs(struct efx_nic *efx, unsigned int ticks); 173 int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs, 174 unsigned int rx_usecs, bool rx_adaptive, 175 bool rx_may_override_tx); 176 void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs, 177 unsigned int *rx_usecs, bool *rx_adaptive); 178 179 /* Update the generic software stats in the passed stats array */ 180 void efx_update_sw_stats(struct efx_nic *efx, u64 *stats); 181 182 /* MTD */ 183 #ifdef CONFIG_SFC_MTD 184 int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts, 185 size_t n_parts, size_t sizeof_part); 186 static inline int efx_mtd_probe(struct efx_nic *efx) 187 { 188 return efx->type->mtd_probe(efx); 189 } 190 void efx_mtd_rename(struct efx_nic *efx); 191 void efx_mtd_remove(struct efx_nic *efx); 192 #else 193 static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; } 194 static inline void efx_mtd_rename(struct efx_nic *efx) {} 195 static inline void efx_mtd_remove(struct efx_nic *efx) {} 196 #endif 197 198 #ifdef CONFIG_SFC_SRIOV 199 static inline unsigned int efx_vf_size(struct efx_nic *efx) 200 { 201 return 1 << efx->vi_scale; 202 } 203 #endif 204 205 static inline void efx_device_detach_sync(struct efx_nic *efx) 206 { 207 struct net_device *dev = efx->net_dev; 208 209 /* Lock/freeze all TX queues so that we can be sure the 210 * TX scheduler is stopped when we're done and before 211 * netif_device_present() becomes false. 212 */ 213 netif_tx_lock_bh(dev); 214 netif_device_detach(dev); 215 netif_tx_unlock_bh(dev); 216 } 217 218 static inline void efx_device_attach_if_not_resetting(struct efx_nic *efx) 219 { 220 if ((efx->state != STATE_DISABLED) && !efx->reset_pending) 221 netif_device_attach(efx->net_dev); 222 } 223 224 static inline bool efx_rwsem_assert_write_locked(struct rw_semaphore *sem) 225 { 226 if (WARN_ON(down_read_trylock(sem))) { 227 up_read(sem); 228 return false; 229 } 230 return true; 231 } 232 233 int efx_xdp_tx_buffers(struct efx_nic *efx, int n, struct xdp_frame **xdpfs, 234 bool flush); 235 236 #endif /* EFX_EFX_H */ 237