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 "efx_common.h" 16 #include "filter.h" 17 18 int efx_net_open(struct net_device *net_dev); 19 int efx_net_stop(struct net_device *net_dev); 20 21 /* TX */ 22 void efx_init_tx_queue_core_txq(struct efx_tx_queue *tx_queue); 23 netdev_tx_t efx_hard_start_xmit(struct sk_buff *skb, 24 struct net_device *net_dev); 25 netdev_tx_t __efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb); 26 static inline netdev_tx_t efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb) 27 { 28 return INDIRECT_CALL_2(tx_queue->efx->type->tx_enqueue, 29 ef100_enqueue_skb, __efx_enqueue_skb, 30 tx_queue, skb); 31 } 32 void efx_xmit_done_single(struct efx_tx_queue *tx_queue); 33 int efx_setup_tc(struct net_device *net_dev, enum tc_setup_type type, 34 void *type_data); 35 extern unsigned int efx_piobuf_size; 36 37 /* RX */ 38 void __efx_rx_packet(struct efx_channel *channel); 39 void efx_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index, 40 unsigned int n_frags, unsigned int len, u16 flags); 41 static inline void efx_rx_flush_packet(struct efx_channel *channel) 42 { 43 if (channel->rx_pkt_n_frags) 44 INDIRECT_CALL_2(channel->efx->type->rx_packet, 45 __ef100_rx_packet, __efx_rx_packet, 46 channel); 47 } 48 static inline bool efx_rx_buf_hash_valid(struct efx_nic *efx, const u8 *prefix) 49 { 50 if (efx->type->rx_buf_hash_valid) 51 return INDIRECT_CALL_1(efx->type->rx_buf_hash_valid, 52 ef100_rx_buf_hash_valid, 53 prefix); 54 return true; 55 } 56 57 /* Maximum number of TCP segments we support for soft-TSO */ 58 #define EFX_TSO_MAX_SEGS 100 59 60 /* The smallest [rt]xq_entries that the driver supports. RX minimum 61 * is a bit arbitrary. For TX, we must have space for at least 2 62 * TSO skbs. 63 */ 64 #define EFX_RXQ_MIN_ENT 128U 65 #define EFX_TXQ_MIN_ENT(efx) (2 * efx_tx_max_skb_descs(efx)) 66 67 /* All EF10 architecture NICs steal one bit of the DMAQ size for various 68 * other purposes when counting TxQ entries, so we halve the queue size. 69 */ 70 #define EFX_TXQ_MAX_ENT(efx) (EFX_WORKAROUND_EF10(efx) ? \ 71 EFX_MAX_DMAQ_SIZE / 2 : EFX_MAX_DMAQ_SIZE) 72 73 static inline bool efx_rss_enabled(struct efx_nic *efx) 74 { 75 return efx->rss_spread > 1; 76 } 77 78 /* Filters */ 79 80 /** 81 * efx_filter_insert_filter - add or replace a filter 82 * @efx: NIC in which to insert the filter 83 * @spec: Specification for the filter 84 * @replace_equal: Flag for whether the specified filter may replace an 85 * existing filter with equal priority 86 * 87 * On success, return the filter ID. 88 * On failure, return a negative error code. 89 * 90 * If existing filters have equal match values to the new filter spec, 91 * then the new filter might replace them or the function might fail, 92 * as follows. 93 * 94 * 1. If the existing filters have lower priority, or @replace_equal 95 * is set and they have equal priority, replace them. 96 * 97 * 2. If the existing filters have higher priority, return -%EPERM. 98 * 99 * 3. If !efx_filter_is_mc_recipient(@spec), or the NIC does not 100 * support delivery to multiple recipients, return -%EEXIST. 101 * 102 * This implies that filters for multiple multicast recipients must 103 * all be inserted with the same priority and @replace_equal = %false. 104 */ 105 static inline s32 efx_filter_insert_filter(struct efx_nic *efx, 106 struct efx_filter_spec *spec, 107 bool replace_equal) 108 { 109 return efx->type->filter_insert(efx, spec, replace_equal); 110 } 111 112 /** 113 * efx_filter_remove_id_safe - remove a filter by ID, carefully 114 * @efx: NIC from which to remove the filter 115 * @priority: Priority of filter, as passed to @efx_filter_insert_filter 116 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter 117 * 118 * This function will range-check @filter_id, so it is safe to call 119 * with a value passed from userland. 120 */ 121 static inline int efx_filter_remove_id_safe(struct efx_nic *efx, 122 enum efx_filter_priority priority, 123 u32 filter_id) 124 { 125 return efx->type->filter_remove_safe(efx, priority, filter_id); 126 } 127 128 /** 129 * efx_filter_get_filter_safe - retrieve a filter by ID, carefully 130 * @efx: NIC from which to remove the filter 131 * @priority: Priority of filter, as passed to @efx_filter_insert_filter 132 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter 133 * @spec: Buffer in which to store filter specification 134 * 135 * This function will range-check @filter_id, so it is safe to call 136 * with a value passed from userland. 137 */ 138 static inline int 139 efx_filter_get_filter_safe(struct efx_nic *efx, 140 enum efx_filter_priority priority, 141 u32 filter_id, struct efx_filter_spec *spec) 142 { 143 return efx->type->filter_get_safe(efx, priority, filter_id, spec); 144 } 145 146 static inline u32 efx_filter_count_rx_used(struct efx_nic *efx, 147 enum efx_filter_priority priority) 148 { 149 return efx->type->filter_count_rx_used(efx, priority); 150 } 151 static inline u32 efx_filter_get_rx_id_limit(struct efx_nic *efx) 152 { 153 return efx->type->filter_get_rx_id_limit(efx); 154 } 155 static inline s32 efx_filter_get_rx_ids(struct efx_nic *efx, 156 enum efx_filter_priority priority, 157 u32 *buf, u32 size) 158 { 159 return efx->type->filter_get_rx_ids(efx, priority, buf, size); 160 } 161 162 /* RSS contexts */ 163 static inline bool efx_rss_active(struct efx_rss_context *ctx) 164 { 165 return ctx->context_id != EFX_MCDI_RSS_CONTEXT_INVALID; 166 } 167 168 /* Ethtool support */ 169 extern const struct ethtool_ops efx_ethtool_ops; 170 171 /* Global */ 172 unsigned int efx_usecs_to_ticks(struct efx_nic *efx, unsigned int usecs); 173 unsigned int efx_ticks_to_usecs(struct efx_nic *efx, unsigned int ticks); 174 int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs, 175 unsigned int rx_usecs, bool rx_adaptive, 176 bool rx_may_override_tx); 177 void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs, 178 unsigned int *rx_usecs, bool *rx_adaptive); 179 180 /* Update the generic software stats in the passed stats array */ 181 void efx_update_sw_stats(struct efx_nic *efx, u64 *stats); 182 183 /* MTD */ 184 #ifdef CONFIG_SFC_MTD 185 int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts, 186 size_t n_parts, size_t sizeof_part); 187 static inline int efx_mtd_probe(struct efx_nic *efx) 188 { 189 return efx->type->mtd_probe(efx); 190 } 191 void efx_mtd_rename(struct efx_nic *efx); 192 void efx_mtd_remove(struct efx_nic *efx); 193 #else 194 static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; } 195 static inline void efx_mtd_rename(struct efx_nic *efx) {} 196 static inline void efx_mtd_remove(struct efx_nic *efx) {} 197 #endif 198 199 #ifdef CONFIG_SFC_SRIOV 200 static inline unsigned int efx_vf_size(struct efx_nic *efx) 201 { 202 return 1 << efx->vi_scale; 203 } 204 #endif 205 206 static inline void efx_device_detach_sync(struct efx_nic *efx) 207 { 208 struct net_device *dev = efx->net_dev; 209 210 /* We must stop reps (which use our TX) before we stop ourselves. */ 211 efx_detach_reps(efx); 212 213 /* Lock/freeze all TX queues so that we can be sure the 214 * TX scheduler is stopped when we're done and before 215 * netif_device_present() becomes false. 216 */ 217 netif_tx_lock_bh(dev); 218 netif_device_detach(dev); 219 netif_tx_unlock_bh(dev); 220 } 221 222 static inline void efx_device_attach_if_not_resetting(struct efx_nic *efx) 223 { 224 if ((efx->state != STATE_DISABLED) && !efx->reset_pending) { 225 netif_device_attach(efx->net_dev); 226 if (efx->state == STATE_NET_UP) 227 efx_attach_reps(efx); 228 } 229 } 230 231 static inline bool efx_rwsem_assert_write_locked(struct rw_semaphore *sem) 232 { 233 if (WARN_ON(down_read_trylock(sem))) { 234 up_read(sem); 235 return false; 236 } 237 return true; 238 } 239 240 int efx_xdp_tx_buffers(struct efx_nic *efx, int n, struct xdp_frame **xdpfs, 241 bool flush); 242 243 #endif /* EFX_EFX_H */ 244