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