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 /* All VFs use BAR 0/1 for memory */
  19 #define EFX_MEM_BAR 2
  20 #define EFX_MEM_VF_BAR 0
  21
  22 int efx_net_open(struct net_device *net_dev);
  23 int efx_net_stop(struct net_device *net_dev);
  24
  25 /* TX */
  26 int efx_probe_tx_queue(struct efx_tx_queue *tx_queue);
  27 void efx_remove_tx_queue(struct efx_tx_queue *tx_queue);
  28 void efx_init_tx_queue(struct efx_tx_queue *tx_queue);
  29 void efx_init_tx_queue_core_txq(struct efx_tx_queue *tx_queue);
  30 void efx_fini_tx_queue(struct efx_tx_queue *tx_queue);
  31 netdev_tx_t efx_hard_start_xmit(struct sk_buff *skb,
  32                                 struct net_device *net_dev);
  33 netdev_tx_t efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb);
  34 void efx_xmit_done(struct efx_tx_queue *tx_queue, unsigned int index);
  35 int efx_setup_tc(struct net_device *net_dev, u8 num_tc);
  36 unsigned int efx_tx_max_skb_descs(struct efx_nic *efx);
  37 extern unsigned int efx_piobuf_size;
  38 extern bool efx_separate_tx_channels;
  39
  40 /* RX */
  41 void efx_set_default_rx_indir_table(struct efx_nic *efx);
  42 void efx_rx_config_page_split(struct efx_nic *efx);
  43 int efx_probe_rx_queue(struct efx_rx_queue *rx_queue);
  44 void efx_remove_rx_queue(struct efx_rx_queue *rx_queue);
  45 void efx_init_rx_queue(struct efx_rx_queue *rx_queue);
  46 void efx_fini_rx_queue(struct efx_rx_queue *rx_queue);
  47 void efx_fast_push_rx_descriptors(struct efx_rx_queue *rx_queue, bool atomic);
  48 void efx_rx_slow_fill(unsigned long context);
  49 void __efx_rx_packet(struct efx_channel *channel);
  50 void efx_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index,
  51                    unsigned int n_frags, unsigned int len, u16 flags);
  52 static inline void efx_rx_flush_packet(struct efx_channel *channel)
  53 {
  54         if (channel->rx_pkt_n_frags)
  55                 __efx_rx_packet(channel);
  56 }
  57 void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
  58
  59 #define EFX_MAX_DMAQ_SIZE 4096UL
  60 #define EFX_DEFAULT_DMAQ_SIZE 1024UL
  61 #define EFX_MIN_DMAQ_SIZE 512UL
  62
  63 #define EFX_MAX_EVQ_SIZE 16384UL
  64 #define EFX_MIN_EVQ_SIZE 512UL
  65
  66 /* Maximum number of TCP segments we support for soft-TSO */
  67 #define EFX_TSO_MAX_SEGS        100
  68
  69 /* The smallest [rt]xq_entries that the driver supports.  RX minimum
  70  * is a bit arbitrary.  For TX, we must have space for at least 2
  71  * TSO skbs.
  72  */
  73 #define EFX_RXQ_MIN_ENT         128U
  74 #define EFX_TXQ_MIN_ENT(efx)    (2 * efx_tx_max_skb_descs(efx))
  75
  76 #define EFX_TXQ_MAX_ENT(efx)    (EFX_WORKAROUND_35388(efx) ? \
  77                                  EFX_MAX_DMAQ_SIZE / 2 : EFX_MAX_DMAQ_SIZE)
  78
  79 /* Filters */
  80
  81 void efx_mac_reconfigure(struct efx_nic *efx);
  82
  83 /**
  84  * efx_filter_insert_filter - add or replace a filter
  85  * @efx: NIC in which to insert the filter
  86  * @spec: Specification for the filter
  87  * @replace_equal: Flag for whether the specified filter may replace an
  88  *      existing filter with equal priority
  89  *
  90  * On success, return the filter ID.
  91  * On failure, return a negative error code.
  92  *
  93  * If existing filters have equal match values to the new filter spec,
  94  * then the new filter might replace them or the function might fail,
  95  * as follows.
  96  *
  97  * 1. If the existing filters have lower priority, or @replace_equal
  98  *    is set and they have equal priority, replace them.
  99  *
 100  * 2. If the existing filters have higher priority, return -%EPERM.
 101  *
 102  * 3. If !efx_filter_is_mc_recipient(@spec), or the NIC does not
 103  *    support delivery to multiple recipients, return -%EEXIST.
 104  *
 105  * This implies that filters for multiple multicast recipients must
 106  * all be inserted with the same priority and @replace_equal = %false.
 107  */
 108 static inline s32 efx_filter_insert_filter(struct efx_nic *efx,
 109                                            struct efx_filter_spec *spec,
 110                                            bool replace_equal)
 111 {
 112         return efx->type->filter_insert(efx, spec, replace_equal);
 113 }
 114
 115 /**
 116  * efx_filter_remove_id_safe - remove a filter by ID, carefully
 117  * @efx: NIC from which to remove the filter
 118  * @priority: Priority of filter, as passed to @efx_filter_insert_filter
 119  * @filter_id: ID of filter, as returned by @efx_filter_insert_filter
 120  *
 121  * This function will range-check @filter_id, so it is safe to call
 122  * with a value passed from userland.
 123  */
 124 static inline int efx_filter_remove_id_safe(struct efx_nic *efx,
 125                                             enum efx_filter_priority priority,
 126                                             u32 filter_id)
 127 {
 128         return efx->type->filter_remove_safe(efx, priority, filter_id);
 129 }
 130
 131 /**
 132  * efx_filter_get_filter_safe - retrieve a filter by ID, carefully
 133  * @efx: NIC from which to remove the filter
 134  * @priority: Priority of filter, as passed to @efx_filter_insert_filter
 135  * @filter_id: ID of filter, as returned by @efx_filter_insert_filter
 136  * @spec: Buffer in which to store filter specification
 137  *
 138  * This function will range-check @filter_id, so it is safe to call
 139  * with a value passed from userland.
 140  */
 141 static inline int
 142 efx_filter_get_filter_safe(struct efx_nic *efx,
 143                            enum efx_filter_priority priority,
 144                            u32 filter_id, struct efx_filter_spec *spec)
 145 {
 146         return efx->type->filter_get_safe(efx, priority, filter_id, spec);
 147 }
 148
 149 static inline u32 efx_filter_count_rx_used(struct efx_nic *efx,
 150                                            enum efx_filter_priority priority)
 151 {
 152         return efx->type->filter_count_rx_used(efx, priority);
 153 }
 154 static inline u32 efx_filter_get_rx_id_limit(struct efx_nic *efx)
 155 {
 156         return efx->type->filter_get_rx_id_limit(efx);
 157 }
 158 static inline s32 efx_filter_get_rx_ids(struct efx_nic *efx,
 159                                         enum efx_filter_priority priority,
 160                                         u32 *buf, u32 size)
 161 {
 162         return efx->type->filter_get_rx_ids(efx, priority, buf, size);
 163 }
 164 #ifdef CONFIG_RFS_ACCEL
 165 int efx_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb,
 166                    u16 rxq_index, u32 flow_id);
 167 bool __efx_filter_rfs_expire(struct efx_nic *efx, unsigned quota);
 168 static inline void efx_filter_rfs_expire(struct efx_channel *channel)
 169 {
 170         if (channel->rfs_filters_added >= 60 &&
 171             __efx_filter_rfs_expire(channel->efx, 100))
 172                 channel->rfs_filters_added -= 60;
 173 }
 174 #define efx_filter_rfs_enabled() 1
 175 #else
 176 static inline void efx_filter_rfs_expire(struct efx_channel *channel) {}
 177 #define efx_filter_rfs_enabled() 0
 178 #endif
 179 bool efx_filter_is_mc_recipient(const struct efx_filter_spec *spec);
 180
 181 /* Channels */
 182 int efx_channel_dummy_op_int(struct efx_channel *channel);
 183 void efx_channel_dummy_op_void(struct efx_channel *channel);
 184 int efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries);
 185
 186 /* Ports */
 187 int efx_reconfigure_port(struct efx_nic *efx);
 188 int __efx_reconfigure_port(struct efx_nic *efx);
 189
 190 /* Ethtool support */
 191 extern const struct ethtool_ops efx_ethtool_ops;
 192
 193 /* Reset handling */
 194 int efx_reset(struct efx_nic *efx, enum reset_type method);
 195 void efx_reset_down(struct efx_nic *efx, enum reset_type method);
 196 int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok);
 197 int efx_try_recovery(struct efx_nic *efx);
 198
 199 /* Global */
 200 void efx_schedule_reset(struct efx_nic *efx, enum reset_type type);
 201 int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs,
 202                             unsigned int rx_usecs, bool rx_adaptive,
 203                             bool rx_may_override_tx);
 204 void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs,
 205                             unsigned int *rx_usecs, bool *rx_adaptive);
 206 void efx_stop_eventq(struct efx_channel *channel);
 207 void efx_start_eventq(struct efx_channel *channel);
 208
 209 /* Dummy PHY ops for PHY drivers */
 210 int efx_port_dummy_op_int(struct efx_nic *efx);
 211 void efx_port_dummy_op_void(struct efx_nic *efx);
 212
 213 /* Update the generic software stats in the passed stats array */
 214 void efx_update_sw_stats(struct efx_nic *efx, u64 *stats);
 215
 216 /* MTD */
 217 #ifdef CONFIG_SFC_MTD
 218 int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts,
 219                 size_t n_parts, size_t sizeof_part);
 220 static inline int efx_mtd_probe(struct efx_nic *efx)
 221 {
 222         return efx->type->mtd_probe(efx);
 223 }
 224 void efx_mtd_rename(struct efx_nic *efx);
 225 void efx_mtd_remove(struct efx_nic *efx);
 226 #else
 227 static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; }
 228 static inline void efx_mtd_rename(struct efx_nic *efx) {}
 229 static inline void efx_mtd_remove(struct efx_nic *efx) {}
 230 #endif
 231
 232 #ifdef CONFIG_SFC_SRIOV
 233 static inline unsigned int efx_vf_size(struct efx_nic *efx)
 234 {
 235         return 1 << efx->vi_scale;
 236 }
 237 #endif
 238
 239 static inline void efx_schedule_channel(struct efx_channel *channel)
 240 {
 241         netif_vdbg(channel->efx, intr, channel->efx->net_dev,
 242                    "channel %d scheduling NAPI poll on CPU%d\n",
 243                    channel->channel, raw_smp_processor_id());
 244
 245         napi_schedule(&channel->napi_str);
 246 }
 247
 248 static inline void efx_schedule_channel_irq(struct efx_channel *channel)
 249 {
 250         channel->event_test_cpu = raw_smp_processor_id();
 251         efx_schedule_channel(channel);
 252 }
 253
 254 void efx_link_status_changed(struct efx_nic *efx);
 255 void efx_link_set_advertising(struct efx_nic *efx, u32);
 256 void efx_link_set_wanted_fc(struct efx_nic *efx, u8);
 257
 258 static inline void efx_device_detach_sync(struct efx_nic *efx)
 259 {
 260         struct net_device *dev = efx->net_dev;
 261
 262         /* Lock/freeze all TX queues so that we can be sure the
 263          * TX scheduler is stopped when we're done and before
 264          * netif_device_present() becomes false.
 265          */
 266         netif_tx_lock_bh(dev);
 267         netif_device_detach(dev);
 268         netif_tx_unlock_bh(dev);
 269 }
 270
 271 #endif /* EFX_EFX_H */