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(struct efx_tx_queue *tx_queue, unsigned int index); 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 49 /* Maximum number of TCP segments we support for soft-TSO */ 50 #define EFX_TSO_MAX_SEGS 100 51 52 /* The smallest [rt]xq_entries that the driver supports. RX minimum 53 * is a bit arbitrary. For TX, we must have space for at least 2 54 * TSO skbs. 55 */ 56 #define EFX_RXQ_MIN_ENT 128U 57 #define EFX_TXQ_MIN_ENT(efx) (2 * efx_tx_max_skb_descs(efx)) 58 59 /* All EF10 architecture NICs steal one bit of the DMAQ size for various 60 * other purposes when counting TxQ entries, so we halve the queue size. 61 */ 62 #define EFX_TXQ_MAX_ENT(efx) (EFX_WORKAROUND_EF10(efx) ? \ 63 EFX_MAX_DMAQ_SIZE / 2 : EFX_MAX_DMAQ_SIZE) 64 65 static inline bool efx_rss_enabled(struct efx_nic *efx) 66 { 67 return efx->rss_spread > 1; 68 } 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 static inline u32 efx_filter_count_rx_used(struct efx_nic *efx, 139 enum efx_filter_priority priority) 140 { 141 return efx->type->filter_count_rx_used(efx, priority); 142 } 143 static inline u32 efx_filter_get_rx_id_limit(struct efx_nic *efx) 144 { 145 return efx->type->filter_get_rx_id_limit(efx); 146 } 147 static inline s32 efx_filter_get_rx_ids(struct efx_nic *efx, 148 enum efx_filter_priority priority, 149 u32 *buf, u32 size) 150 { 151 return efx->type->filter_get_rx_ids(efx, priority, buf, size); 152 } 153 154 /* RSS contexts */ 155 static inline bool efx_rss_active(struct efx_rss_context *ctx) 156 { 157 return ctx->context_id != EFX_MCDI_RSS_CONTEXT_INVALID; 158 } 159 160 /* Ethtool support */ 161 extern const struct ethtool_ops efx_ethtool_ops; 162 163 /* Global */ 164 unsigned int efx_usecs_to_ticks(struct efx_nic *efx, unsigned int usecs); 165 unsigned int efx_ticks_to_usecs(struct efx_nic *efx, unsigned int ticks); 166 int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs, 167 unsigned int rx_usecs, bool rx_adaptive, 168 bool rx_may_override_tx); 169 void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs, 170 unsigned int *rx_usecs, bool *rx_adaptive); 171 172 /* Update the generic software stats in the passed stats array */ 173 void efx_update_sw_stats(struct efx_nic *efx, u64 *stats); 174 175 /* MTD */ 176 #ifdef CONFIG_SFC_MTD 177 int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts, 178 size_t n_parts, size_t sizeof_part); 179 static inline int efx_mtd_probe(struct efx_nic *efx) 180 { 181 return efx->type->mtd_probe(efx); 182 } 183 void efx_mtd_rename(struct efx_nic *efx); 184 void efx_mtd_remove(struct efx_nic *efx); 185 #else 186 static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; } 187 static inline void efx_mtd_rename(struct efx_nic *efx) {} 188 static inline void efx_mtd_remove(struct efx_nic *efx) {} 189 #endif 190 191 #ifdef CONFIG_SFC_SRIOV 192 static inline unsigned int efx_vf_size(struct efx_nic *efx) 193 { 194 return 1 << efx->vi_scale; 195 } 196 #endif 197 198 static inline void efx_device_detach_sync(struct efx_nic *efx) 199 { 200 struct net_device *dev = efx->net_dev; 201 202 /* Lock/freeze all TX queues so that we can be sure the 203 * TX scheduler is stopped when we're done and before 204 * netif_device_present() becomes false. 205 */ 206 netif_tx_lock_bh(dev); 207 netif_device_detach(dev); 208 netif_tx_unlock_bh(dev); 209 } 210 211 static inline void efx_device_attach_if_not_resetting(struct efx_nic *efx) 212 { 213 if ((efx->state != STATE_DISABLED) && !efx->reset_pending) 214 netif_device_attach(efx->net_dev); 215 } 216 217 static inline bool efx_rwsem_assert_write_locked(struct rw_semaphore *sem) 218 { 219 if (WARN_ON(down_read_trylock(sem))) { 220 up_read(sem); 221 return false; 222 } 223 return true; 224 } 225 226 int efx_xdp_tx_buffers(struct efx_nic *efx, int n, struct xdp_frame **xdpfs, 227 bool flush); 228 229 #endif /* EFX_EFX_H */ 230