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