LXR linux/drivers/net/ethernet/sfc/efx.h

   1/****************************************************************************
   2 * Driver for Solarflare network controllers and boards
   3 * Copyright 2005-2006 Fen Systems Ltd.
   4 * Copyright 2006-2013 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/* All controllers use BAR 0 for I/O space and BAR 2(&3) for memory */
  18#define EFX_MEM_BAR 2
  19
  20/* TX */
  21int efx_probe_tx_queue(struct efx_tx_queue *tx_queue);
  22void efx_remove_tx_queue(struct efx_tx_queue *tx_queue);
  23void efx_init_tx_queue(struct efx_tx_queue *tx_queue);
  24void efx_init_tx_queue_core_txq(struct efx_tx_queue *tx_queue);
  25void efx_fini_tx_queue(struct efx_tx_queue *tx_queue);
  26netdev_tx_t efx_hard_start_xmit(struct sk_buff *skb,
  27                                struct net_device *net_dev);
  28netdev_tx_t efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb);
  29void efx_xmit_done(struct efx_tx_queue *tx_queue, unsigned int index);
  30int efx_setup_tc(struct net_device *net_dev, u8 num_tc);
  31unsigned int efx_tx_max_skb_descs(struct efx_nic *efx);
  32extern unsigned int efx_piobuf_size;
  33
  34/* RX */
  35void efx_rx_config_page_split(struct efx_nic *efx);
  36int efx_probe_rx_queue(struct efx_rx_queue *rx_queue);
  37void efx_remove_rx_queue(struct efx_rx_queue *rx_queue);
  38void efx_init_rx_queue(struct efx_rx_queue *rx_queue);
  39void efx_fini_rx_queue(struct efx_rx_queue *rx_queue);
  40void efx_fast_push_rx_descriptors(struct efx_rx_queue *rx_queue, bool atomic);
  41void efx_rx_slow_fill(unsigned long context);
  42void __efx_rx_packet(struct efx_channel *channel);
  43void efx_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index,
  44                   unsigned int n_frags, unsigned int len, u16 flags);
  45static inline void efx_rx_flush_packet(struct efx_channel *channel)
  46{
  47        if (channel->rx_pkt_n_frags)
  48                __efx_rx_packet(channel);
  49}
  50void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
  51
  52#define EFX_MAX_DMAQ_SIZE 4096UL
  53#define EFX_DEFAULT_DMAQ_SIZE 1024UL
  54#define EFX_MIN_DMAQ_SIZE 512UL
  55
  56#define EFX_MAX_EVQ_SIZE 16384UL
  57#define EFX_MIN_EVQ_SIZE 512UL
  58
  59/* Maximum number of TCP segments we support for soft-TSO */
  60#define EFX_TSO_MAX_SEGS        100
  61
  62/* The smallest [rt]xq_entries that the driver supports.  RX minimum
  63 * is a bit arbitrary.  For TX, we must have space for at least 2
  64 * TSO skbs.
  65 */
  66#define EFX_RXQ_MIN_ENT         128U
  67#define EFX_TXQ_MIN_ENT(efx)    (2 * efx_tx_max_skb_descs(efx))
  68
  69#define EFX_TXQ_MAX_ENT(efx)    (EFX_WORKAROUND_35388(efx) ? \
  70                                 EFX_MAX_DMAQ_SIZE / 2 : EFX_MAX_DMAQ_SIZE)
  71
  72/* Filters */
  73
  74/**
  75 * efx_filter_insert_filter - add or replace a filter
  76 * @efx: NIC in which to insert the filter
  77 * @spec: Specification for the filter
  78 * @replace_equal: Flag for whether the specified filter may replace an
  79 *      existing filter with equal priority
  80 *
  81 * On success, return the filter ID.
  82 * On failure, return a negative error code.
  83 *
  84 * If existing filters have equal match values to the new filter spec,
  85 * then the new filter might replace them or the function might fail,
  86 * as follows.
  87 *
  88 * 1. If the existing filters have lower priority, or @replace_equal
  89 *    is set and they have equal priority, replace them.
  90 *
  91 * 2. If the existing filters have higher priority, return -%EPERM.
  92 *
  93 * 3. If !efx_filter_is_mc_recipient(@spec), or the NIC does not
  94 *    support delivery to multiple recipients, return -%EEXIST.
  95 *
  96 * This implies that filters for multiple multicast recipients must
  97 * all be inserted with the same priority and @replace_equal = %false.
  98 */
  99static inline s32 efx_filter_insert_filter(struct efx_nic *efx,
 100                                           struct efx_filter_spec *spec,
 101                                           bool replace_equal)
 102{
 103        return efx->type->filter_insert(efx, spec, replace_equal);
 104}
 105
 106/**
 107 * efx_filter_remove_id_safe - remove a filter by ID, carefully
 108 * @efx: NIC from which to remove the filter
 109 * @priority: Priority of filter, as passed to @efx_filter_insert_filter
 110 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter
 111 *
 112 * This function will range-check @filter_id, so it is safe to call
 113 * with a value passed from userland.
 114 */
 115static inline int efx_filter_remove_id_safe(struct efx_nic *efx,
 116                                            enum efx_filter_priority priority,
 117                                            u32 filter_id)
 118{
 119        return efx->type->filter_remove_safe(efx, priority, filter_id);
 120}
 121
 122/**
 123 * efx_filter_get_filter_safe - retrieve a filter by ID, carefully
 124 * @efx: NIC from which to remove the filter
 125 * @priority: Priority of filter, as passed to @efx_filter_insert_filter
 126 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter
 127 * @spec: Buffer in which to store filter specification
 128 *
 129 * This function will range-check @filter_id, so it is safe to call
 130 * with a value passed from userland.
 131 */
 132static inline int
 133efx_filter_get_filter_safe(struct efx_nic *efx,
 134                           enum efx_filter_priority priority,
 135                           u32 filter_id, struct efx_filter_spec *spec)
 136{
 137        return efx->type->filter_get_safe(efx, priority, filter_id, spec);
 138}
 139
 140static inline u32 efx_filter_count_rx_used(struct efx_nic *efx,
 141                                           enum efx_filter_priority priority)
 142{
 143        return efx->type->filter_count_rx_used(efx, priority);
 144}
 145static inline u32 efx_filter_get_rx_id_limit(struct efx_nic *efx)
 146{
 147        return efx->type->filter_get_rx_id_limit(efx);
 148}
 149static inline s32 efx_filter_get_rx_ids(struct efx_nic *efx,
 150                                        enum efx_filter_priority priority,
 151                                        u32 *buf, u32 size)
 152{
 153        return efx->type->filter_get_rx_ids(efx, priority, buf, size);
 154}
 155#ifdef CONFIG_RFS_ACCEL
 156int efx_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb,
 157                   u16 rxq_index, u32 flow_id);
 158bool __efx_filter_rfs_expire(struct efx_nic *efx, unsigned quota);
 159static inline void efx_filter_rfs_expire(struct efx_channel *channel)
 160{
 161        if (channel->rfs_filters_added >= 60 &&
 162            __efx_filter_rfs_expire(channel->efx, 100))
 163                channel->rfs_filters_added -= 60;
 164}
 165#define efx_filter_rfs_enabled() 1
 166#else
 167static inline void efx_filter_rfs_expire(struct efx_channel *channel) {}
 168#define efx_filter_rfs_enabled() 0
 169#endif
 170bool efx_filter_is_mc_recipient(const struct efx_filter_spec *spec);
 171
 172/* Channels */
 173int efx_channel_dummy_op_int(struct efx_channel *channel);
 174void efx_channel_dummy_op_void(struct efx_channel *channel);
 175int efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries);
 176
 177/* Ports */
 178int efx_reconfigure_port(struct efx_nic *efx);
 179int __efx_reconfigure_port(struct efx_nic *efx);
 180
 181/* Ethtool support */
 182extern const struct ethtool_ops efx_ethtool_ops;
 183
 184/* Reset handling */
 185int efx_reset(struct efx_nic *efx, enum reset_type method);
 186void efx_reset_down(struct efx_nic *efx, enum reset_type method);
 187int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok);
 188int efx_try_recovery(struct efx_nic *efx);
 189
 190/* Global */
 191void efx_schedule_reset(struct efx_nic *efx, enum reset_type type);
 192int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs,
 193                            unsigned int rx_usecs, bool rx_adaptive,
 194                            bool rx_may_override_tx);
 195void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs,
 196                            unsigned int *rx_usecs, bool *rx_adaptive);
 197void efx_stop_eventq(struct efx_channel *channel);
 198void efx_start_eventq(struct efx_channel *channel);
 199
 200/* Dummy PHY ops for PHY drivers */
 201int efx_port_dummy_op_int(struct efx_nic *efx);
 202void efx_port_dummy_op_void(struct efx_nic *efx);
 203
 204/* Update the generic software stats in the passed stats array */
 205void efx_update_sw_stats(struct efx_nic *efx, u64 *stats);
 206
 207/* MTD */
 208#ifdef CONFIG_SFC_MTD
 209int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts,
 210                size_t n_parts, size_t sizeof_part);
 211static inline int efx_mtd_probe(struct efx_nic *efx)
 212{
 213        return efx->type->mtd_probe(efx);
 214}
 215void efx_mtd_rename(struct efx_nic *efx);
 216void efx_mtd_remove(struct efx_nic *efx);
 217#else
 218static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; }
 219static inline void efx_mtd_rename(struct efx_nic *efx) {}
 220static inline void efx_mtd_remove(struct efx_nic *efx) {}
 221#endif
 222
 223static inline void efx_schedule_channel(struct efx_channel *channel)
 224{
 225        netif_vdbg(channel->efx, intr, channel->efx->net_dev,
 226                   "channel %d scheduling NAPI poll on CPU%d\n",
 227                   channel->channel, raw_smp_processor_id());
 228
 229        napi_schedule(&channel->napi_str);
 230}
 231
 232static inline void efx_schedule_channel_irq(struct efx_channel *channel)
 233{
 234        channel->event_test_cpu = raw_smp_processor_id();
 235        efx_schedule_channel(channel);
 236}
 237
 238void efx_link_status_changed(struct efx_nic *efx);
 239void efx_link_set_advertising(struct efx_nic *efx, u32);
 240void efx_link_set_wanted_fc(struct efx_nic *efx, u8);
 241
 242static inline void efx_device_detach_sync(struct efx_nic *efx)
 243{
 244        struct net_device *dev = efx->net_dev;
 245
 246        /* Lock/freeze all TX queues so that we can be sure the
 247         * TX scheduler is stopped when we're done and before
 248         * netif_device_present() becomes false.
 249         */
 250        netif_tx_lock_bh(dev);
 251        netif_device_detach(dev);
 252        netif_tx_unlock_bh(dev);
 253}
 254
 255#endif /* EFX_EFX_H */
 256