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