drivers/net/ethernet/sfc/efx.h

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This source file includes following definitions.
efx_rx_flush_packet
efx_rss_enabled
efx_filter_insert_filter
efx_filter_remove_id_safe
efx_filter_get_filter_safe
efx_filter_count_rx_used
efx_filter_get_rx_id_limit
efx_filter_get_rx_ids
efx_filter_rfs_expire
efx_filter_rfs_expire
efx_rss_active
efx_mtd_probe
efx_mtd_probe
efx_mtd_rename
efx_mtd_remove
efx_vf_size
efx_schedule_channel
efx_schedule_channel_irq
efx_device_detach_sync
efx_device_attach_if_not_resetting
efx_rwsem_assert_write_locked
   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /****************************************************************************
   3  * Driver for Solarflare network controllers and boards
   4  * Copyright 2005-2006 Fen Systems Ltd.
   5  * Copyright 2006-2013 Solarflare Communications Inc.
   6  */
   7 
   8 #ifndef EFX_EFX_H
   9 #define EFX_EFX_H
  10 
  11 #include "net_driver.h"
  12 #include "filter.h"
  13 
  14 int efx_net_open(struct net_device *net_dev);
  15 int efx_net_stop(struct net_device *net_dev);
  16 
  17 /* TX */
  18 int efx_probe_tx_queue(struct efx_tx_queue *tx_queue);
  19 void efx_remove_tx_queue(struct efx_tx_queue *tx_queue);
  20 void efx_init_tx_queue(struct efx_tx_queue *tx_queue);
  21 void efx_init_tx_queue_core_txq(struct efx_tx_queue *tx_queue);
  22 void efx_fini_tx_queue(struct efx_tx_queue *tx_queue);
  23 netdev_tx_t efx_hard_start_xmit(struct sk_buff *skb,
  24                                 struct net_device *net_dev);
  25 netdev_tx_t efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb);
  26 void efx_xmit_done(struct efx_tx_queue *tx_queue, unsigned int index);
  27 int efx_setup_tc(struct net_device *net_dev, enum tc_setup_type type,
  28                  void *type_data);
  29 unsigned int efx_tx_max_skb_descs(struct efx_nic *efx);
  30 extern unsigned int efx_piobuf_size;
  31 extern bool efx_separate_tx_channels;
  32 
  33 /* RX */
  34 void efx_set_default_rx_indir_table(struct efx_nic *efx,
  35                                     struct efx_rss_context *ctx);
  36 void efx_rx_config_page_split(struct efx_nic *efx);
  37 int efx_probe_rx_queue(struct efx_rx_queue *rx_queue);
  38 void efx_remove_rx_queue(struct efx_rx_queue *rx_queue);
  39 void efx_init_rx_queue(struct efx_rx_queue *rx_queue);
  40 void efx_fini_rx_queue(struct efx_rx_queue *rx_queue);
  41 void efx_fast_push_rx_descriptors(struct efx_rx_queue *rx_queue, bool atomic);
  42 void efx_rx_slow_fill(struct timer_list *t);
  43 void __efx_rx_packet(struct efx_channel *channel);
  44 void efx_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index,
  45                    unsigned int n_frags, 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 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 /* All EF10 architecture NICs steal one bit of the DMAQ size for various
  71  * other purposes when counting TxQ entries, so we halve the queue size.
  72  */
  73 #define EFX_TXQ_MAX_ENT(efx)    (EFX_WORKAROUND_EF10(efx) ? \
  74                                  EFX_MAX_DMAQ_SIZE / 2 : EFX_MAX_DMAQ_SIZE)
  75 
  76 static inline bool efx_rss_enabled(struct efx_nic *efx)
  77 {
  78         return efx->rss_spread > 1;
  79 }
  80 
  81 /* Filters */
  82 
  83 void efx_mac_reconfigure(struct efx_nic *efx);
  84 
  85 /**
  86  * efx_filter_insert_filter - add or replace a filter
  87  * @efx: NIC in which to insert the filter
  88  * @spec: Specification for the filter
  89  * @replace_equal: Flag for whether the specified filter may replace an
  90  *      existing filter with equal priority
  91  *
  92  * On success, return the filter ID.
  93  * On failure, return a negative error code.
  94  *
  95  * If existing filters have equal match values to the new filter spec,
  96  * then the new filter might replace them or the function might fail,
  97  * as follows.
  98  *
  99  * 1. If the existing filters have lower priority, or @replace_equal
 100  *    is set and they have equal priority, replace them.
 101  *
 102  * 2. If the existing filters have higher priority, return -%EPERM.
 103  *
 104  * 3. If !efx_filter_is_mc_recipient(@spec), or the NIC does not
 105  *    support delivery to multiple recipients, return -%EEXIST.
 106  *
 107  * This implies that filters for multiple multicast recipients must
 108  * all be inserted with the same priority and @replace_equal = %false.
 109  */
 110 static inline s32 efx_filter_insert_filter(struct efx_nic *efx,
 111                                            struct efx_filter_spec *spec,
 112                                            bool replace_equal)
 113 {
 114         return efx->type->filter_insert(efx, spec, replace_equal);
 115 }
 116 
 117 /**
 118  * efx_filter_remove_id_safe - remove a filter by ID, carefully
 119  * @efx: NIC from which to remove the filter
 120  * @priority: Priority of filter, as passed to @efx_filter_insert_filter
 121  * @filter_id: ID of filter, as returned by @efx_filter_insert_filter
 122  *
 123  * This function will range-check @filter_id, so it is safe to call
 124  * with a value passed from userland.
 125  */
 126 static inline int efx_filter_remove_id_safe(struct efx_nic *efx,
 127                                             enum efx_filter_priority priority,
 128                                             u32 filter_id)
 129 {
 130         return efx->type->filter_remove_safe(efx, priority, filter_id);
 131 }
 132 
 133 /**
 134  * efx_filter_get_filter_safe - retrieve a filter by ID, carefully
 135  * @efx: NIC from which to remove the filter
 136  * @priority: Priority of filter, as passed to @efx_filter_insert_filter
 137  * @filter_id: ID of filter, as returned by @efx_filter_insert_filter
 138  * @spec: Buffer in which to store filter specification
 139  *
 140  * This function will range-check @filter_id, so it is safe to call
 141  * with a value passed from userland.
 142  */
 143 static inline int
 144 efx_filter_get_filter_safe(struct efx_nic *efx,
 145                            enum efx_filter_priority priority,
 146                            u32 filter_id, struct efx_filter_spec *spec)
 147 {
 148         return efx->type->filter_get_safe(efx, priority, filter_id, spec);
 149 }
 150 
 151 static inline u32 efx_filter_count_rx_used(struct efx_nic *efx,
 152                                            enum efx_filter_priority priority)
 153 {
 154         return efx->type->filter_count_rx_used(efx, priority);
 155 }
 156 static inline u32 efx_filter_get_rx_id_limit(struct efx_nic *efx)
 157 {
 158         return efx->type->filter_get_rx_id_limit(efx);
 159 }
 160 static inline s32 efx_filter_get_rx_ids(struct efx_nic *efx,
 161                                         enum efx_filter_priority priority,
 162                                         u32 *buf, u32 size)
 163 {
 164         return efx->type->filter_get_rx_ids(efx, priority, buf, size);
 165 }
 166 #ifdef CONFIG_RFS_ACCEL
 167 int efx_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb,
 168                    u16 rxq_index, u32 flow_id);
 169 bool __efx_filter_rfs_expire(struct efx_nic *efx, unsigned quota);
 170 static inline void efx_filter_rfs_expire(struct work_struct *data)
 171 {
 172         struct efx_channel *channel = container_of(data, struct efx_channel,
 173                                                    filter_work);
 174 
 175         if (channel->rfs_filters_added >= 60 &&
 176             __efx_filter_rfs_expire(channel->efx, 100))
 177                 channel->rfs_filters_added -= 60;
 178 }
 179 #define efx_filter_rfs_enabled() 1
 180 #else
 181 static inline void efx_filter_rfs_expire(struct work_struct *data) {}
 182 #define efx_filter_rfs_enabled() 0
 183 #endif
 184 bool efx_filter_is_mc_recipient(const struct efx_filter_spec *spec);
 185 
 186 bool efx_filter_spec_equal(const struct efx_filter_spec *left,
 187                            const struct efx_filter_spec *right);
 188 u32 efx_filter_spec_hash(const struct efx_filter_spec *spec);
 189 
 190 #ifdef CONFIG_RFS_ACCEL
 191 bool efx_rps_check_rule(struct efx_arfs_rule *rule, unsigned int filter_idx,
 192                         bool *force);
 193 
 194 struct efx_arfs_rule *efx_rps_hash_find(struct efx_nic *efx,
 195                                         const struct efx_filter_spec *spec);
 196 
 197 /* @new is written to indicate if entry was newly added (true) or if an old
 198  * entry was found and returned (false).
 199  */
 200 struct efx_arfs_rule *efx_rps_hash_add(struct efx_nic *efx,
 201                                        const struct efx_filter_spec *spec,
 202                                        bool *new);
 203 
 204 void efx_rps_hash_del(struct efx_nic *efx, const struct efx_filter_spec *spec);
 205 #endif
 206 
 207 /* RSS contexts */
 208 struct efx_rss_context *efx_alloc_rss_context_entry(struct efx_nic *efx);
 209 struct efx_rss_context *efx_find_rss_context_entry(struct efx_nic *efx, u32 id);
 210 void efx_free_rss_context_entry(struct efx_rss_context *ctx);
 211 static inline bool efx_rss_active(struct efx_rss_context *ctx)
 212 {
 213         return ctx->context_id != EFX_EF10_RSS_CONTEXT_INVALID;
 214 }
 215 
 216 /* Channels */
 217 int efx_channel_dummy_op_int(struct efx_channel *channel);
 218 void efx_channel_dummy_op_void(struct efx_channel *channel);
 219 int efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries);
 220 
 221 /* Ports */
 222 int efx_reconfigure_port(struct efx_nic *efx);
 223 int __efx_reconfigure_port(struct efx_nic *efx);
 224 
 225 /* Ethtool support */
 226 extern const struct ethtool_ops efx_ethtool_ops;
 227 
 228 /* Reset handling */
 229 int efx_reset(struct efx_nic *efx, enum reset_type method);
 230 void efx_reset_down(struct efx_nic *efx, enum reset_type method);
 231 int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok);
 232 int efx_try_recovery(struct efx_nic *efx);
 233 
 234 /* Global */
 235 void efx_schedule_reset(struct efx_nic *efx, enum reset_type type);
 236 unsigned int efx_usecs_to_ticks(struct efx_nic *efx, unsigned int usecs);
 237 unsigned int efx_ticks_to_usecs(struct efx_nic *efx, unsigned int ticks);
 238 int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs,
 239                             unsigned int rx_usecs, bool rx_adaptive,
 240                             bool rx_may_override_tx);
 241 void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs,
 242                             unsigned int *rx_usecs, bool *rx_adaptive);
 243 void efx_stop_eventq(struct efx_channel *channel);
 244 void efx_start_eventq(struct efx_channel *channel);
 245 
 246 /* Dummy PHY ops for PHY drivers */
 247 int efx_port_dummy_op_int(struct efx_nic *efx);
 248 void efx_port_dummy_op_void(struct efx_nic *efx);
 249 
 250 /* Update the generic software stats in the passed stats array */
 251 void efx_update_sw_stats(struct efx_nic *efx, u64 *stats);
 252 
 253 /* MTD */
 254 #ifdef CONFIG_SFC_MTD
 255 int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts,
 256                 size_t n_parts, size_t sizeof_part);
 257 static inline int efx_mtd_probe(struct efx_nic *efx)
 258 {
 259         return efx->type->mtd_probe(efx);
 260 }
 261 void efx_mtd_rename(struct efx_nic *efx);
 262 void efx_mtd_remove(struct efx_nic *efx);
 263 #else
 264 static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; }
 265 static inline void efx_mtd_rename(struct efx_nic *efx) {}
 266 static inline void efx_mtd_remove(struct efx_nic *efx) {}
 267 #endif
 268 
 269 #ifdef CONFIG_SFC_SRIOV
 270 static inline unsigned int efx_vf_size(struct efx_nic *efx)
 271 {
 272         return 1 << efx->vi_scale;
 273 }
 274 #endif
 275 
 276 static inline void efx_schedule_channel(struct efx_channel *channel)
 277 {
 278         netif_vdbg(channel->efx, intr, channel->efx->net_dev,
 279                    "channel %d scheduling NAPI poll on CPU%d\n",
 280                    channel->channel, raw_smp_processor_id());
 281 
 282         napi_schedule(&channel->napi_str);
 283 }
 284 
 285 static inline void efx_schedule_channel_irq(struct efx_channel *channel)
 286 {
 287         channel->event_test_cpu = raw_smp_processor_id();
 288         efx_schedule_channel(channel);
 289 }
 290 
 291 void efx_link_status_changed(struct efx_nic *efx);
 292 void efx_link_set_advertising(struct efx_nic *efx,
 293                               const unsigned long *advertising);
 294 void efx_link_clear_advertising(struct efx_nic *efx);
 295 void efx_link_set_wanted_fc(struct efx_nic *efx, u8);
 296 
 297 static inline void efx_device_detach_sync(struct efx_nic *efx)
 298 {
 299         struct net_device *dev = efx->net_dev;
 300 
 301         /* Lock/freeze all TX queues so that we can be sure the
 302          * TX scheduler is stopped when we're done and before
 303          * netif_device_present() becomes false.
 304          */
 305         netif_tx_lock_bh(dev);
 306         netif_device_detach(dev);
 307         netif_tx_unlock_bh(dev);
 308 }
 309 
 310 static inline void efx_device_attach_if_not_resetting(struct efx_nic *efx)
 311 {
 312         if ((efx->state != STATE_DISABLED) && !efx->reset_pending)
 313                 netif_device_attach(efx->net_dev);
 314 }
 315 
 316 static inline bool efx_rwsem_assert_write_locked(struct rw_semaphore *sem)
 317 {
 318         if (WARN_ON(down_read_trylock(sem))) {
 319                 up_read(sem);
 320                 return false;
 321         }
 322         return true;
 323 }
 324 
 325 #endif /* EFX_EFX_H */
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/net/ethernet/sfc/efx.h

INCLUDED FROM

DEFINITIONS
