LXR linux/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 */
  21extern int efx_probe_tx_queue(struct efx_tx_queue *tx_queue);
  22extern void efx_remove_tx_queue(struct efx_tx_queue *tx_queue);
  23extern void efx_init_tx_queue(struct efx_tx_queue *tx_queue);
  24extern void efx_init_tx_queue_core_txq(struct efx_tx_queue *tx_queue);
  25extern void efx_fini_tx_queue(struct efx_tx_queue *tx_queue);
  26extern void efx_release_tx_buffers(struct efx_tx_queue *tx_queue);
  27extern netdev_tx_t
  28efx_hard_start_xmit(struct sk_buff *skb, struct net_device *net_dev);
  29extern netdev_tx_t
  30efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb);
  31extern void efx_xmit_done(struct efx_tx_queue *tx_queue, unsigned int index);
  32extern int efx_setup_tc(struct net_device *net_dev, u8 num_tc);
  33extern unsigned int efx_tx_max_skb_descs(struct efx_nic *efx);
  34
  35/* RX */
  36extern void efx_rx_config_page_split(struct efx_nic *efx);
  37extern int efx_probe_rx_queue(struct efx_rx_queue *rx_queue);
  38extern void efx_remove_rx_queue(struct efx_rx_queue *rx_queue);
  39extern void efx_init_rx_queue(struct efx_rx_queue *rx_queue);
  40extern void efx_fini_rx_queue(struct efx_rx_queue *rx_queue);
  41extern void efx_fast_push_rx_descriptors(struct efx_rx_queue *rx_queue);
  42extern void efx_rx_slow_fill(unsigned long context);
  43extern void __efx_rx_packet(struct efx_channel *channel);
  44extern void efx_rx_packet(struct efx_rx_queue *rx_queue,
  45                          unsigned int index, unsigned int n_frags,
  46                          unsigned int len, u16 flags);
  47static inline void efx_rx_flush_packet(struct efx_channel *channel)
  48{
  49        if (channel->rx_pkt_n_frags)
  50                __efx_rx_packet(channel);
  51}
  52extern 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 */
  72extern int efx_probe_filters(struct efx_nic *efx);
  73extern void efx_restore_filters(struct efx_nic *efx);
  74extern void efx_remove_filters(struct efx_nic *efx);
  75extern void efx_filter_update_rx_scatter(struct efx_nic *efx);
  76extern s32 efx_filter_insert_filter(struct efx_nic *efx,
  77                                    struct efx_filter_spec *spec,
  78                                    bool replace);
  79extern int efx_filter_remove_id_safe(struct efx_nic *efx,
  80                                     enum efx_filter_priority priority,
  81                                     u32 filter_id);
  82extern int efx_filter_get_filter_safe(struct efx_nic *efx,
  83                                      enum efx_filter_priority priority,
  84                                      u32 filter_id, struct efx_filter_spec *);
  85extern void efx_filter_clear_rx(struct efx_nic *efx,
  86                                enum efx_filter_priority priority);
  87extern u32 efx_filter_count_rx_used(struct efx_nic *efx,
  88                                    enum efx_filter_priority priority);
  89extern u32 efx_filter_get_rx_id_limit(struct efx_nic *efx);
  90extern 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
  94extern int efx_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb,
  95                          u16 rxq_index, u32 flow_id);
  96extern bool __efx_filter_rfs_expire(struct efx_nic *efx, unsigned quota);
  97static 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
 105static inline void efx_filter_rfs_expire(struct efx_channel *channel) {}
 106#define efx_filter_rfs_enabled() 0
 107#endif
 108
 109/* Channels */
 110extern int efx_channel_dummy_op_int(struct efx_channel *channel);
 111extern void efx_channel_dummy_op_void(struct efx_channel *channel);
 112extern void efx_process_channel_now(struct efx_channel *channel);
 113extern int
 114efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries);
 115
 116/* Ports */
 117extern int efx_reconfigure_port(struct efx_nic *efx);
 118extern int __efx_reconfigure_port(struct efx_nic *efx);
 119
 120/* Ethtool support */
 121extern const struct ethtool_ops efx_ethtool_ops;
 122
 123/* Reset handling */
 124extern int efx_reset(struct efx_nic *efx, enum reset_type method);
 125extern void efx_reset_down(struct efx_nic *efx, enum reset_type method);
 126extern int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok);
 127extern int efx_try_recovery(struct efx_nic *efx);
 128
 129/* Global */
 130extern void efx_schedule_reset(struct efx_nic *efx, enum reset_type type);
 131extern int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs,
 132                                   unsigned int rx_usecs, bool rx_adaptive,
 133                                   bool rx_may_override_tx);
 134extern void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs,
 135                                   unsigned int *rx_usecs, bool *rx_adaptive);
 136
 137/* Dummy PHY ops for PHY drivers */
 138extern int efx_port_dummy_op_int(struct efx_nic *efx);
 139extern void efx_port_dummy_op_void(struct efx_nic *efx);
 140
 141
 142/* MTD */
 143#ifdef CONFIG_SFC_MTD
 144extern int efx_mtd_probe(struct efx_nic *efx);
 145extern void efx_mtd_rename(struct efx_nic *efx);
 146extern void efx_mtd_remove(struct efx_nic *efx);
 147#else
 148static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; }
 149static inline void efx_mtd_rename(struct efx_nic *efx) {}
 150static inline void efx_mtd_remove(struct efx_nic *efx) {}
 151#endif
 152
 153static inline void efx_schedule_channel(struct efx_channel *channel)
 154{
 155        netif_vdbg(channel->efx, intr, channel->efx->net_dev,
 156                   "channel %d scheduling NAPI poll on CPU%d\n",
 157                   channel->channel, raw_smp_processor_id());
 158        channel->work_pending = true;
 159
 160        napi_schedule(&channel->napi_str);
 161}
 162
 163static inline void efx_schedule_channel_irq(struct efx_channel *channel)
 164{
 165        channel->event_test_cpu = raw_smp_processor_id();
 166        efx_schedule_channel(channel);
 167}
 168
 169extern void efx_link_status_changed(struct efx_nic *efx);
 170extern void efx_link_set_advertising(struct efx_nic *efx, u32);
 171extern void efx_link_set_wanted_fc(struct efx_nic *efx, u8);
 172
 173static inline void efx_device_detach_sync(struct efx_nic *efx)
 174{
 175        struct net_device *dev = efx->net_dev;
 176
 177        /* Lock/freeze all TX queues so that we can be sure the
 178         * TX scheduler is stopped when we're done and before
 179         * netif_device_present() becomes false.
 180         */
 181        netif_tx_lock_bh(dev);
 182        netif_device_detach(dev);
 183        netif_tx_unlock_bh(dev);
 184}
 185
 186#endif /* EFX_EFX_H */
 187