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