drivers/net/ethernet/sfc/efx.h

   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
  34 /* RX */
  35 extern int efx_probe_rx_queue(struct efx_rx_queue *rx_queue);
  36 extern void efx_remove_rx_queue(struct efx_rx_queue *rx_queue);
  37 extern void efx_init_rx_queue(struct efx_rx_queue *rx_queue);
  38 extern void efx_fini_rx_queue(struct efx_rx_queue *rx_queue);
  39 extern void efx_rx_strategy(struct efx_channel *channel);
  40 extern void efx_fast_push_rx_descriptors(struct efx_rx_queue *rx_queue);
  41 extern void efx_rx_slow_fill(unsigned long context);
  42 extern void __efx_rx_packet(struct efx_channel *channel,
  43                             struct efx_rx_buffer *rx_buf, bool checksummed);
  44 extern void efx_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index,
  45                           unsigned int len, bool checksummed, bool discard);
  46 extern void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
  47
  48 #define EFX_MAX_DMAQ_SIZE 4096UL
  49 #define EFX_DEFAULT_DMAQ_SIZE 1024UL
  50 #define EFX_MIN_DMAQ_SIZE 512UL
  51
  52 #define EFX_MAX_EVQ_SIZE 16384UL
  53 #define EFX_MIN_EVQ_SIZE 512UL
  54
  55 /* The smallest [rt]xq_entries that the driver supports. Callers of
  56  * efx_wake_queue() assume that they can subsequently send at least one
  57  * skb. Falcon/A1 may require up to three descriptors per skb_frag. */
  58 #define EFX_MIN_RING_SIZE (roundup_pow_of_two(2 * 3 * MAX_SKB_FRAGS))
  59
  60 /* Filters */
  61 extern int efx_probe_filters(struct efx_nic *efx);
  62 extern void efx_restore_filters(struct efx_nic *efx);
  63 extern void efx_remove_filters(struct efx_nic *efx);
  64 extern s32 efx_filter_insert_filter(struct efx_nic *efx,
  65                                     struct efx_filter_spec *spec,
  66                                     bool replace);
  67 extern int efx_filter_remove_id_safe(struct efx_nic *efx,
  68                                      enum efx_filter_priority priority,
  69                                      u32 filter_id);
  70 extern int efx_filter_get_filter_safe(struct efx_nic *efx,
  71                                       enum efx_filter_priority priority,
  72                                       u32 filter_id, struct efx_filter_spec *);
  73 extern void efx_filter_clear_rx(struct efx_nic *efx,
  74                                 enum efx_filter_priority priority);
  75 extern u32 efx_filter_count_rx_used(struct efx_nic *efx,
  76                                     enum efx_filter_priority priority);
  77 extern u32 efx_filter_get_rx_id_limit(struct efx_nic *efx);
  78 extern s32 efx_filter_get_rx_ids(struct efx_nic *efx,
  79                                  enum efx_filter_priority priority,
  80                                  u32 *buf, u32 size);
  81 #ifdef CONFIG_RFS_ACCEL
  82 extern int efx_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb,
  83                           u16 rxq_index, u32 flow_id);
  84 extern bool __efx_filter_rfs_expire(struct efx_nic *efx, unsigned quota);
  85 static inline void efx_filter_rfs_expire(struct efx_channel *channel)
  86 {
  87         if (channel->rfs_filters_added >= 60 &&
  88             __efx_filter_rfs_expire(channel->efx, 100))
  89                 channel->rfs_filters_added -= 60;
  90 }
  91 #define efx_filter_rfs_enabled() 1
  92 #else
  93 static inline void efx_filter_rfs_expire(struct efx_channel *channel) {}
  94 #define efx_filter_rfs_enabled() 0
  95 #endif
  96
  97 /* Channels */
  98 extern void efx_process_channel_now(struct efx_channel *channel);
  99 extern int
 100 efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries);
 101
 102 /* Ports */
 103 extern int efx_reconfigure_port(struct efx_nic *efx);
 104 extern int __efx_reconfigure_port(struct efx_nic *efx);
 105
 106 /* Ethtool support */
 107 extern const struct ethtool_ops efx_ethtool_ops;
 108
 109 /* Reset handling */
 110 extern int efx_reset(struct efx_nic *efx, enum reset_type method);
 111 extern void efx_reset_down(struct efx_nic *efx, enum reset_type method);
 112 extern int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok);
 113
 114 /* Global */
 115 extern void efx_schedule_reset(struct efx_nic *efx, enum reset_type type);
 116 extern int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs,
 117                                    unsigned int rx_usecs, bool rx_adaptive,
 118                                    bool rx_may_override_tx);
 119 extern void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs,
 120                                    unsigned int *rx_usecs, bool *rx_adaptive);
 121
 122 /* Dummy PHY ops for PHY drivers */
 123 extern int efx_port_dummy_op_int(struct efx_nic *efx);
 124 extern void efx_port_dummy_op_void(struct efx_nic *efx);
 125
 126
 127 /* MTD */
 128 #ifdef CONFIG_SFC_MTD
 129 extern int efx_mtd_probe(struct efx_nic *efx);
 130 extern void efx_mtd_rename(struct efx_nic *efx);
 131 extern void efx_mtd_remove(struct efx_nic *efx);
 132 #else
 133 static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; }
 134 static inline void efx_mtd_rename(struct efx_nic *efx) {}
 135 static inline void efx_mtd_remove(struct efx_nic *efx) {}
 136 #endif
 137
 138 static inline void efx_schedule_channel(struct efx_channel *channel)
 139 {
 140         netif_vdbg(channel->efx, intr, channel->efx->net_dev,
 141                    "channel %d scheduling NAPI poll on CPU%d\n",
 142                    channel->channel, raw_smp_processor_id());
 143         channel->work_pending = true;
 144
 145         napi_schedule(&channel->napi_str);
 146 }
 147
 148 extern void efx_link_status_changed(struct efx_nic *efx);
 149 extern void efx_link_set_advertising(struct efx_nic *efx, u32);
 150 extern void efx_link_set_wanted_fc(struct efx_nic *efx, u8);
 151
 152 #endif /* EFX_EFX_H */