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 extern unsigned int efx_tx_max_skb_descs(struct efx_nic *efx);
  34
  35 /* RX */
  36 extern int efx_probe_rx_queue(struct efx_rx_queue *rx_queue);
  37 extern void efx_remove_rx_queue(struct efx_rx_queue *rx_queue);
  38 extern void efx_init_rx_queue(struct efx_rx_queue *rx_queue);
  39 extern void efx_fini_rx_queue(struct efx_rx_queue *rx_queue);
  40 extern void efx_rx_strategy(struct efx_channel *channel);
  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                             struct efx_rx_buffer *rx_buf);
  45 extern void efx_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index,
  46                           unsigned int len, u16 flags);
  47 extern void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
  48
  49 #define EFX_MAX_DMAQ_SIZE 4096UL
  50 #define EFX_DEFAULT_DMAQ_SIZE 1024UL
  51 #define EFX_MIN_DMAQ_SIZE 512UL
  52
  53 #define EFX_MAX_EVQ_SIZE 16384UL
  54 #define EFX_MIN_EVQ_SIZE 512UL
  55
  56 /* Maximum number of TCP segments we support for soft-TSO */
  57 #define EFX_TSO_MAX_SEGS        100
  58
  59 /* The smallest [rt]xq_entries that the driver supports.  RX minimum
  60  * is a bit arbitrary.  For TX, we must have space for at least 2
  61  * TSO skbs.
  62  */
  63 #define EFX_RXQ_MIN_ENT         128U
  64 #define EFX_TXQ_MIN_ENT(efx)    (2 * efx_tx_max_skb_descs(efx))
  65
  66 /* Filters */
  67 extern int efx_probe_filters(struct efx_nic *efx);
  68 extern void efx_restore_filters(struct efx_nic *efx);
  69 extern void efx_remove_filters(struct efx_nic *efx);
  70 extern s32 efx_filter_insert_filter(struct efx_nic *efx,
  71                                     struct efx_filter_spec *spec,
  72                                     bool replace);
  73 extern int efx_filter_remove_id_safe(struct efx_nic *efx,
  74                                      enum efx_filter_priority priority,
  75                                      u32 filter_id);
  76 extern int efx_filter_get_filter_safe(struct efx_nic *efx,
  77                                       enum efx_filter_priority priority,
  78                                       u32 filter_id, struct efx_filter_spec *);
  79 extern void efx_filter_clear_rx(struct efx_nic *efx,
  80                                 enum efx_filter_priority priority);
  81 extern u32 efx_filter_count_rx_used(struct efx_nic *efx,
  82                                     enum efx_filter_priority priority);
  83 extern u32 efx_filter_get_rx_id_limit(struct efx_nic *efx);
  84 extern s32 efx_filter_get_rx_ids(struct efx_nic *efx,
  85                                  enum efx_filter_priority priority,
  86                                  u32 *buf, u32 size);
  87 #ifdef CONFIG_RFS_ACCEL
  88 extern int efx_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb,
  89                           u16 rxq_index, u32 flow_id);
  90 extern bool __efx_filter_rfs_expire(struct efx_nic *efx, unsigned quota);
  91 static inline void efx_filter_rfs_expire(struct efx_channel *channel)
  92 {
  93         if (channel->rfs_filters_added >= 60 &&
  94             __efx_filter_rfs_expire(channel->efx, 100))
  95                 channel->rfs_filters_added -= 60;
  96 }
  97 #define efx_filter_rfs_enabled() 1
  98 #else
  99 static inline void efx_filter_rfs_expire(struct efx_channel *channel) {}
 100 #define efx_filter_rfs_enabled() 0
 101 #endif
 102
 103 /* Channels */
 104 extern int efx_channel_dummy_op_int(struct efx_channel *channel);
 105 extern void efx_process_channel_now(struct efx_channel *channel);
 106 extern int
 107 efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries);
 108
 109 /* Ports */
 110 extern int efx_reconfigure_port(struct efx_nic *efx);
 111 extern int __efx_reconfigure_port(struct efx_nic *efx);
 112
 113 /* Ethtool support */
 114 extern const struct ethtool_ops efx_ethtool_ops;
 115
 116 /* Reset handling */
 117 extern int efx_reset(struct efx_nic *efx, enum reset_type method);
 118 extern void efx_reset_down(struct efx_nic *efx, enum reset_type method);
 119 extern int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok);
 120
 121 /* Global */
 122 extern void efx_schedule_reset(struct efx_nic *efx, enum reset_type type);
 123 extern int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs,
 124                                    unsigned int rx_usecs, bool rx_adaptive,
 125                                    bool rx_may_override_tx);
 126 extern void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs,
 127                                    unsigned int *rx_usecs, bool *rx_adaptive);
 128
 129 /* Dummy PHY ops for PHY drivers */
 130 extern int efx_port_dummy_op_int(struct efx_nic *efx);
 131 extern void efx_port_dummy_op_void(struct efx_nic *efx);
 132
 133
 134 /* MTD */
 135 #ifdef CONFIG_SFC_MTD
 136 extern int efx_mtd_probe(struct efx_nic *efx);
 137 extern void efx_mtd_rename(struct efx_nic *efx);
 138 extern void efx_mtd_remove(struct efx_nic *efx);
 139 #else
 140 static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; }
 141 static inline void efx_mtd_rename(struct efx_nic *efx) {}
 142 static inline void efx_mtd_remove(struct efx_nic *efx) {}
 143 #endif
 144
 145 static inline void efx_schedule_channel(struct efx_channel *channel)
 146 {
 147         netif_vdbg(channel->efx, intr, channel->efx->net_dev,
 148                    "channel %d scheduling NAPI poll on CPU%d\n",
 149                    channel->channel, raw_smp_processor_id());
 150         channel->work_pending = true;
 151
 152         napi_schedule(&channel->napi_str);
 153 }
 154
 155 static inline void efx_schedule_channel_irq(struct efx_channel *channel)
 156 {
 157         channel->event_test_cpu = raw_smp_processor_id();
 158         efx_schedule_channel(channel);
 159 }
 160
 161 extern void efx_link_status_changed(struct efx_nic *efx);
 162 extern void efx_link_set_advertising(struct efx_nic *efx, u32);
 163 extern void efx_link_set_wanted_fc(struct efx_nic *efx, u8);
 164
 165 static inline void efx_device_detach_sync(struct efx_nic *efx)
 166 {
 167         struct net_device *dev = efx->net_dev;
 168
 169         /* Lock/freeze all TX queues so that we can be sure the
 170          * TX scheduler is stopped when we're done and before
 171          * netif_device_present() becomes false.
 172          */
 173         netif_tx_lock_bh(dev);
 174         netif_device_detach(dev);
 175         netif_tx_unlock_bh(dev);
 176 }
 177
 178 #endif /* EFX_EFX_H */