efx.h 10 KB

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  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. #ifndef EFX_EFX_H
  11. #define EFX_EFX_H
  12. #include "net_driver.h"
  13. #include "filter.h"
  14. /* All controllers use BAR 0 for I/O space and BAR 2(&3) for memory */
  15. /* All VFs use BAR 0/1 for memory */
  16. #define EFX_MEM_BAR 2
  17. #define EFX_MEM_VF_BAR 0
  18. int efx_net_open(struct net_device *net_dev);
  19. int efx_net_stop(struct net_device *net_dev);
  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, enum tc_setup_type type,
  31. void *type_data);
  32. unsigned int efx_tx_max_skb_descs(struct efx_nic *efx);
  33. extern unsigned int efx_piobuf_size;
  34. extern bool efx_separate_tx_channels;
  35. /* RX */
  36. void efx_set_default_rx_indir_table(struct efx_nic *efx);
  37. void efx_rx_config_page_split(struct efx_nic *efx);
  38. int efx_probe_rx_queue(struct efx_rx_queue *rx_queue);
  39. void efx_remove_rx_queue(struct efx_rx_queue *rx_queue);
  40. void efx_init_rx_queue(struct efx_rx_queue *rx_queue);
  41. void efx_fini_rx_queue(struct efx_rx_queue *rx_queue);
  42. void efx_fast_push_rx_descriptors(struct efx_rx_queue *rx_queue, bool atomic);
  43. void efx_rx_slow_fill(unsigned long context);
  44. void __efx_rx_packet(struct efx_channel *channel);
  45. void efx_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index,
  46. unsigned int n_frags, unsigned int len, u16 flags);
  47. static inline void efx_rx_flush_packet(struct efx_channel *channel)
  48. {
  49. if (channel->rx_pkt_n_frags)
  50. __efx_rx_packet(channel);
  51. }
  52. void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
  53. #define EFX_MAX_DMAQ_SIZE 4096UL
  54. #define EFX_DEFAULT_DMAQ_SIZE 1024UL
  55. #define EFX_MIN_DMAQ_SIZE 512UL
  56. #define EFX_MAX_EVQ_SIZE 16384UL
  57. #define EFX_MIN_EVQ_SIZE 512UL
  58. /* Maximum number of TCP segments we support for soft-TSO */
  59. #define EFX_TSO_MAX_SEGS 100
  60. /* The smallest [rt]xq_entries that the driver supports. RX minimum
  61. * is a bit arbitrary. For TX, we must have space for at least 2
  62. * TSO skbs.
  63. */
  64. #define EFX_RXQ_MIN_ENT 128U
  65. #define EFX_TXQ_MIN_ENT(efx) (2 * efx_tx_max_skb_descs(efx))
  66. /* All EF10 architecture NICs steal one bit of the DMAQ size for various
  67. * other purposes when counting TxQ entries, so we halve the queue size.
  68. */
  69. #define EFX_TXQ_MAX_ENT(efx) (EFX_WORKAROUND_EF10(efx) ? \
  70. EFX_MAX_DMAQ_SIZE / 2 : EFX_MAX_DMAQ_SIZE)
  71. static inline bool efx_rss_enabled(struct efx_nic *efx)
  72. {
  73. return efx->rss_spread > 1;
  74. }
  75. /* Filters */
  76. void efx_mac_reconfigure(struct efx_nic *efx);
  77. /**
  78. * efx_filter_insert_filter - add or replace a filter
  79. * @efx: NIC in which to insert the filter
  80. * @spec: Specification for the filter
  81. * @replace_equal: Flag for whether the specified filter may replace an
  82. * existing filter with equal priority
  83. *
  84. * On success, return the filter ID.
  85. * On failure, return a negative error code.
  86. *
  87. * If existing filters have equal match values to the new filter spec,
  88. * then the new filter might replace them or the function might fail,
  89. * as follows.
  90. *
  91. * 1. If the existing filters have lower priority, or @replace_equal
  92. * is set and they have equal priority, replace them.
  93. *
  94. * 2. If the existing filters have higher priority, return -%EPERM.
  95. *
  96. * 3. If !efx_filter_is_mc_recipient(@spec), or the NIC does not
  97. * support delivery to multiple recipients, return -%EEXIST.
  98. *
  99. * This implies that filters for multiple multicast recipients must
  100. * all be inserted with the same priority and @replace_equal = %false.
  101. */
  102. static inline s32 efx_filter_insert_filter(struct efx_nic *efx,
  103. struct efx_filter_spec *spec,
  104. bool replace_equal)
  105. {
  106. return efx->type->filter_insert(efx, spec, replace_equal);
  107. }
  108. /**
  109. * efx_filter_remove_id_safe - remove a filter by ID, carefully
  110. * @efx: NIC from which to remove the filter
  111. * @priority: Priority of filter, as passed to @efx_filter_insert_filter
  112. * @filter_id: ID of filter, as returned by @efx_filter_insert_filter
  113. *
  114. * This function will range-check @filter_id, so it is safe to call
  115. * with a value passed from userland.
  116. */
  117. static inline int efx_filter_remove_id_safe(struct efx_nic *efx,
  118. enum efx_filter_priority priority,
  119. u32 filter_id)
  120. {
  121. return efx->type->filter_remove_safe(efx, priority, filter_id);
  122. }
  123. /**
  124. * efx_filter_get_filter_safe - retrieve a filter by ID, carefully
  125. * @efx: NIC from which to remove the filter
  126. * @priority: Priority of filter, as passed to @efx_filter_insert_filter
  127. * @filter_id: ID of filter, as returned by @efx_filter_insert_filter
  128. * @spec: Buffer in which to store filter specification
  129. *
  130. * This function will range-check @filter_id, so it is safe to call
  131. * with a value passed from userland.
  132. */
  133. static inline int
  134. efx_filter_get_filter_safe(struct efx_nic *efx,
  135. enum efx_filter_priority priority,
  136. u32 filter_id, struct efx_filter_spec *spec)
  137. {
  138. return efx->type->filter_get_safe(efx, priority, filter_id, spec);
  139. }
  140. static 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. }
  145. static inline u32 efx_filter_get_rx_id_limit(struct efx_nic *efx)
  146. {
  147. return efx->type->filter_get_rx_id_limit(efx);
  148. }
  149. static 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
  156. int efx_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb,
  157. u16 rxq_index, u32 flow_id);
  158. bool __efx_filter_rfs_expire(struct efx_nic *efx, unsigned quota);
  159. static 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
  167. static inline void efx_filter_rfs_expire(struct efx_channel *channel) {}
  168. #define efx_filter_rfs_enabled() 0
  169. #endif
  170. bool efx_filter_is_mc_recipient(const struct efx_filter_spec *spec);
  171. /* Channels */
  172. int efx_channel_dummy_op_int(struct efx_channel *channel);
  173. void efx_channel_dummy_op_void(struct efx_channel *channel);
  174. int efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries);
  175. /* Ports */
  176. int efx_reconfigure_port(struct efx_nic *efx);
  177. int __efx_reconfigure_port(struct efx_nic *efx);
  178. /* Ethtool support */
  179. extern const struct ethtool_ops efx_ethtool_ops;
  180. /* Reset handling */
  181. int efx_reset(struct efx_nic *efx, enum reset_type method);
  182. void efx_reset_down(struct efx_nic *efx, enum reset_type method);
  183. int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok);
  184. int efx_try_recovery(struct efx_nic *efx);
  185. /* Global */
  186. void efx_schedule_reset(struct efx_nic *efx, enum reset_type type);
  187. unsigned int efx_usecs_to_ticks(struct efx_nic *efx, unsigned int usecs);
  188. unsigned int efx_ticks_to_usecs(struct efx_nic *efx, unsigned int ticks);
  189. int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs,
  190. unsigned int rx_usecs, bool rx_adaptive,
  191. bool rx_may_override_tx);
  192. void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs,
  193. unsigned int *rx_usecs, bool *rx_adaptive);
  194. void efx_stop_eventq(struct efx_channel *channel);
  195. void efx_start_eventq(struct efx_channel *channel);
  196. /* Dummy PHY ops for PHY drivers */
  197. int efx_port_dummy_op_int(struct efx_nic *efx);
  198. void efx_port_dummy_op_void(struct efx_nic *efx);
  199. /* Update the generic software stats in the passed stats array */
  200. void efx_update_sw_stats(struct efx_nic *efx, u64 *stats);
  201. /* MTD */
  202. #ifdef CONFIG_SFC_MTD
  203. int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts,
  204. size_t n_parts, size_t sizeof_part);
  205. static inline int efx_mtd_probe(struct efx_nic *efx)
  206. {
  207. return efx->type->mtd_probe(efx);
  208. }
  209. void efx_mtd_rename(struct efx_nic *efx);
  210. void efx_mtd_remove(struct efx_nic *efx);
  211. #else
  212. static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; }
  213. static inline void efx_mtd_rename(struct efx_nic *efx) {}
  214. static inline void efx_mtd_remove(struct efx_nic *efx) {}
  215. #endif
  216. #ifdef CONFIG_SFC_SRIOV
  217. static inline unsigned int efx_vf_size(struct efx_nic *efx)
  218. {
  219. return 1 << efx->vi_scale;
  220. }
  221. #endif
  222. static inline void efx_schedule_channel(struct efx_channel *channel)
  223. {
  224. netif_vdbg(channel->efx, intr, channel->efx->net_dev,
  225. "channel %d scheduling NAPI poll on CPU%d\n",
  226. channel->channel, raw_smp_processor_id());
  227. napi_schedule(&channel->napi_str);
  228. }
  229. static inline void efx_schedule_channel_irq(struct efx_channel *channel)
  230. {
  231. channel->event_test_cpu = raw_smp_processor_id();
  232. efx_schedule_channel(channel);
  233. }
  234. void efx_link_status_changed(struct efx_nic *efx);
  235. void efx_link_set_advertising(struct efx_nic *efx, u32);
  236. void efx_link_set_wanted_fc(struct efx_nic *efx, u8);
  237. static inline void efx_device_detach_sync(struct efx_nic *efx)
  238. {
  239. struct net_device *dev = efx->net_dev;
  240. /* Lock/freeze all TX queues so that we can be sure the
  241. * TX scheduler is stopped when we're done and before
  242. * netif_device_present() becomes false.
  243. */
  244. netif_tx_lock_bh(dev);
  245. netif_device_detach(dev);
  246. netif_tx_unlock_bh(dev);
  247. }
  248. static inline void efx_device_attach_if_not_resetting(struct efx_nic *efx)
  249. {
  250. if ((efx->state != STATE_DISABLED) && !efx->reset_pending)
  251. netif_device_attach(efx->net_dev);
  252. }
  253. static inline bool efx_rwsem_assert_write_locked(struct rw_semaphore *sem)
  254. {
  255. if (WARN_ON(down_read_trylock(sem))) {
  256. up_read(sem);
  257. return false;
  258. }
  259. return true;
  260. }
  261. #endif /* EFX_EFX_H */