| 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 */ |