1 /**************************************************************************** 2 * Driver for Solarflare Solarstorm network controllers and boards 3 * Copyright 2005-2006 Fen Systems Ltd. 4 * Copyright 2006-2010 Solarflare Communications Inc. 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 as published 8 * by the Free Software Foundation, incorporated herein by reference. 9 */ 10 11 #ifndef EFX_EFX_H 12 #define EFX_EFX_H 13 14 #include "net_driver.h" 15 #include "filter.h" 16 17 /* Solarstorm controllers use BAR 0 for I/O space and BAR 2(&3) for memory */ 18 #define EFX_MEM_BAR 2 19 20 /* TX */ 21 extern int efx_probe_tx_queue(struct efx_tx_queue *tx_queue); 22 extern void efx_remove_tx_queue(struct efx_tx_queue *tx_queue); 23 extern void efx_init_tx_queue(struct efx_tx_queue *tx_queue); 24 extern void efx_init_tx_queue_core_txq(struct efx_tx_queue *tx_queue); 25 extern void efx_fini_tx_queue(struct efx_tx_queue *tx_queue); 26 extern void efx_release_tx_buffers(struct efx_tx_queue *tx_queue); 27 extern netdev_tx_t 28 efx_hard_start_xmit(struct sk_buff *skb, struct net_device *net_dev); 29 extern netdev_tx_t 30 efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb); 31 extern void efx_xmit_done(struct efx_tx_queue *tx_queue, unsigned int index); 32 extern int efx_setup_tc(struct net_device *net_dev, u8 num_tc); 33 extern unsigned int efx_tx_max_skb_descs(struct efx_nic *efx); 34 35 /* RX */ 36 extern void efx_rx_config_page_split(struct efx_nic *efx); 37 extern int efx_probe_rx_queue(struct efx_rx_queue *rx_queue); 38 extern void efx_remove_rx_queue(struct efx_rx_queue *rx_queue); 39 extern void efx_init_rx_queue(struct efx_rx_queue *rx_queue); 40 extern void efx_fini_rx_queue(struct efx_rx_queue *rx_queue); 41 extern void efx_fast_push_rx_descriptors(struct efx_rx_queue *rx_queue); 42 extern void efx_rx_slow_fill(unsigned long context); 43 extern void __efx_rx_packet(struct efx_channel *channel); 44 extern void efx_rx_packet(struct efx_rx_queue *rx_queue, 45 unsigned int index, unsigned int n_frags, 46 unsigned int len, u16 flags); 47 static inline void efx_rx_flush_packet(struct efx_channel *channel) 48 { 49 if (channel->rx_pkt_n_frags) 50 __efx_rx_packet(channel); 51 } 52 extern void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue); 53 54 #define EFX_MAX_DMAQ_SIZE 4096UL 55 #define EFX_DEFAULT_DMAQ_SIZE 1024UL 56 #define EFX_MIN_DMAQ_SIZE 512UL 57 58 #define EFX_MAX_EVQ_SIZE 16384UL 59 #define EFX_MIN_EVQ_SIZE 512UL 60 61 /* Maximum number of TCP segments we support for soft-TSO */ 62 #define EFX_TSO_MAX_SEGS 100 63 64 /* The smallest [rt]xq_entries that the driver supports. RX minimum 65 * is a bit arbitrary. For TX, we must have space for at least 2 66 * TSO skbs. 67 */ 68 #define EFX_RXQ_MIN_ENT 128U 69 #define EFX_TXQ_MIN_ENT(efx) (2 * efx_tx_max_skb_descs(efx)) 70 71 /* Filters */ 72 extern int efx_probe_filters(struct efx_nic *efx); 73 extern void efx_restore_filters(struct efx_nic *efx); 74 extern void efx_remove_filters(struct efx_nic *efx); 75 extern void efx_filter_update_rx_scatter(struct efx_nic *efx); 76 extern s32 efx_filter_insert_filter(struct efx_nic *efx, 77 struct efx_filter_spec *spec, 78 bool replace); 79 extern int efx_filter_remove_id_safe(struct efx_nic *efx, 80 enum efx_filter_priority priority, 81 u32 filter_id); 82 extern int efx_filter_get_filter_safe(struct efx_nic *efx, 83 enum efx_filter_priority priority, 84 u32 filter_id, struct efx_filter_spec *); 85 extern void efx_filter_clear_rx(struct efx_nic *efx, 86 enum efx_filter_priority priority); 87 extern u32 efx_filter_count_rx_used(struct efx_nic *efx, 88 enum efx_filter_priority priority); 89 extern u32 efx_filter_get_rx_id_limit(struct efx_nic *efx); 90 extern s32 efx_filter_get_rx_ids(struct efx_nic *efx, 91 enum efx_filter_priority priority, 92 u32 *buf, u32 size); 93 #ifdef CONFIG_RFS_ACCEL 94 extern int efx_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb, 95 u16 rxq_index, u32 flow_id); 96 extern bool __efx_filter_rfs_expire(struct efx_nic *efx, unsigned quota); 97 static inline void efx_filter_rfs_expire(struct efx_channel *channel) 98 { 99 if (channel->rfs_filters_added >= 60 && 100 __efx_filter_rfs_expire(channel->efx, 100)) 101 channel->rfs_filters_added -= 60; 102 } 103 #define efx_filter_rfs_enabled() 1 104 #else 105 static inline void efx_filter_rfs_expire(struct efx_channel *channel) {} 106 #define efx_filter_rfs_enabled() 0 107 #endif 108 109 /* Channels */ 110 extern int efx_channel_dummy_op_int(struct efx_channel *channel); 111 extern void efx_channel_dummy_op_void(struct efx_channel *channel); 112 extern void efx_process_channel_now(struct efx_channel *channel); 113 extern int 114 efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries); 115 116 /* Ports */ 117 extern int efx_reconfigure_port(struct efx_nic *efx); 118 extern int __efx_reconfigure_port(struct efx_nic *efx); 119 120 /* Ethtool support */ 121 extern const struct ethtool_ops efx_ethtool_ops; 122 123 /* Reset handling */ 124 extern int efx_reset(struct efx_nic *efx, enum reset_type method); 125 extern void efx_reset_down(struct efx_nic *efx, enum reset_type method); 126 extern int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok); 127 128 /* Global */ 129 extern void efx_schedule_reset(struct efx_nic *efx, enum reset_type type); 130 extern int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs, 131 unsigned int rx_usecs, bool rx_adaptive, 132 bool rx_may_override_tx); 133 extern void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs, 134 unsigned int *rx_usecs, bool *rx_adaptive); 135 136 /* Dummy PHY ops for PHY drivers */ 137 extern int efx_port_dummy_op_int(struct efx_nic *efx); 138 extern void efx_port_dummy_op_void(struct efx_nic *efx); 139 140 141 /* MTD */ 142 #ifdef CONFIG_SFC_MTD 143 extern int efx_mtd_probe(struct efx_nic *efx); 144 extern void efx_mtd_rename(struct efx_nic *efx); 145 extern void efx_mtd_remove(struct efx_nic *efx); 146 #else 147 static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; } 148 static inline void efx_mtd_rename(struct efx_nic *efx) {} 149 static inline void efx_mtd_remove(struct efx_nic *efx) {} 150 #endif 151 152 static inline void efx_schedule_channel(struct efx_channel *channel) 153 { 154 netif_vdbg(channel->efx, intr, channel->efx->net_dev, 155 "channel %d scheduling NAPI poll on CPU%d\n", 156 channel->channel, raw_smp_processor_id()); 157 channel->work_pending = true; 158 159 napi_schedule(&channel->napi_str); 160 } 161 162 static inline void efx_schedule_channel_irq(struct efx_channel *channel) 163 { 164 channel->event_test_cpu = raw_smp_processor_id(); 165 efx_schedule_channel(channel); 166 } 167 168 extern void efx_link_status_changed(struct efx_nic *efx); 169 extern void efx_link_set_advertising(struct efx_nic *efx, u32); 170 extern void efx_link_set_wanted_fc(struct efx_nic *efx, u8); 171 172 static inline void efx_device_detach_sync(struct efx_nic *efx) 173 { 174 struct net_device *dev = efx->net_dev; 175 176 /* Lock/freeze all TX queues so that we can be sure the 177 * TX scheduler is stopped when we're done and before 178 * netif_device_present() becomes false. 179 */ 180 netif_tx_lock_bh(dev); 181 netif_device_detach(dev); 182 netif_tx_unlock_bh(dev); 183 } 184 185 #endif /* EFX_EFX_H */ 186