drivers/net/ethernet/sfc/efx.h - linux - Git at Google

 /****************************************************************************
  * Driver for Solarflare Solarstorm network controllers and boards
  * Copyright 2005-2006 Fen Systems Ltd.
  * Copyright 2006-2010 Solarflare Communications Inc.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 as published
  * by the Free Software Foundation, incorporated herein by reference.
  */

 #ifndef EFX_EFX_H
 #define EFX_EFX_H

 #include "net_driver.h"
 #include "filter.h"

 /* Solarstorm controllers use BAR 0 for I/O space and BAR 2(&3) for memory */
 #define EFX_MEM_BAR 2

 /* TX */
 extern int efx_probe_tx_queue(struct efx_tx_queue *tx_queue);
 extern void efx_remove_tx_queue(struct efx_tx_queue *tx_queue);
 extern void efx_init_tx_queue(struct efx_tx_queue *tx_queue);
 extern void efx_init_tx_queue_core_txq(struct efx_tx_queue *tx_queue);
 extern void efx_fini_tx_queue(struct efx_tx_queue *tx_queue);
 extern void efx_release_tx_buffers(struct efx_tx_queue *tx_queue);
 extern netdev_tx_t
 efx_hard_start_xmit(struct sk_buff *skb, struct net_device *net_dev);
 extern netdev_tx_t
 efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb);
 extern void efx_xmit_done(struct efx_tx_queue *tx_queue, unsigned int index);
 extern int efx_setup_tc(struct net_device *net_dev, u8 num_tc);
 extern unsigned int efx_tx_max_skb_descs(struct efx_nic *efx);

 /* RX */
 extern int efx_probe_rx_queue(struct efx_rx_queue *rx_queue);
 extern void efx_remove_rx_queue(struct efx_rx_queue *rx_queue);
 extern void efx_init_rx_queue(struct efx_rx_queue *rx_queue);
 extern void efx_fini_rx_queue(struct efx_rx_queue *rx_queue);
 extern void efx_rx_strategy(struct efx_channel *channel);
 extern void efx_fast_push_rx_descriptors(struct efx_rx_queue *rx_queue);
 extern void efx_rx_slow_fill(unsigned long context);
 extern void __efx_rx_packet(struct efx_channel *channel,
 			    struct efx_rx_buffer *rx_buf);
 extern void efx_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index,
 			  unsigned int len, u16 flags);
 extern void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);

 #define EFX_MAX_DMAQ_SIZE 4096UL
 #define EFX_DEFAULT_DMAQ_SIZE 1024UL
 #define EFX_MIN_DMAQ_SIZE 512UL

 #define EFX_MAX_EVQ_SIZE 16384UL
 #define EFX_MIN_EVQ_SIZE 512UL

 /* Maximum number of TCP segments we support for soft-TSO */
 #define EFX_TSO_MAX_SEGS	100

 /* The smallest [rt]xq_entries that the driver supports.  RX minimum
  * is a bit arbitrary.  For TX, we must have space for at least 2
  * TSO skbs.
  */
 #define EFX_RXQ_MIN_ENT		128U
 #define EFX_TXQ_MIN_ENT(efx)	(2 * efx_tx_max_skb_descs(efx))

 /* Filters */
 extern int efx_probe_filters(struct efx_nic *efx);
 extern void efx_restore_filters(struct efx_nic *efx);
 extern void efx_remove_filters(struct efx_nic *efx);
 extern s32 efx_filter_insert_filter(struct efx_nic *efx,
 				    struct efx_filter_spec *spec,
 				    bool replace);
 extern int efx_filter_remove_id_safe(struct efx_nic *efx,
 				     enum efx_filter_priority priority,
 				     u32 filter_id);
 extern int efx_filter_get_filter_safe(struct efx_nic *efx,
 				      enum efx_filter_priority priority,
 				      u32 filter_id, struct efx_filter_spec *);
 extern void efx_filter_clear_rx(struct efx_nic *efx,
 				enum efx_filter_priority priority);
 extern u32 efx_filter_count_rx_used(struct efx_nic *efx,
 				    enum efx_filter_priority priority);
 extern u32 efx_filter_get_rx_id_limit(struct efx_nic *efx);
 extern s32 efx_filter_get_rx_ids(struct efx_nic *efx,
 				 enum efx_filter_priority priority,
 				 u32 *buf, u32 size);
 #ifdef CONFIG_RFS_ACCEL
 extern int efx_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb,
 			  u16 rxq_index, u32 flow_id);
 extern bool __efx_filter_rfs_expire(struct efx_nic *efx, unsigned quota);
 static inline void efx_filter_rfs_expire(struct efx_channel *channel)
 {
 	if (channel->rfs_filters_added >= 60 &&
 	    __efx_filter_rfs_expire(channel->efx, 100))
 		channel->rfs_filters_added -= 60;
 }
 #define efx_filter_rfs_enabled() 1
 #else
 static inline void efx_filter_rfs_expire(struct efx_channel *channel) {}
 #define efx_filter_rfs_enabled() 0
 #endif

 /* Channels */
 extern int efx_channel_dummy_op_int(struct efx_channel *channel);
 extern void efx_channel_dummy_op_void(struct efx_channel *channel);
 extern void efx_process_channel_now(struct efx_channel *channel);
 extern int
 efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries);

 /* Ports */
 extern int efx_reconfigure_port(struct efx_nic *efx);
 extern int __efx_reconfigure_port(struct efx_nic *efx);

 /* Ethtool support */
 extern const struct ethtool_ops efx_ethtool_ops;

 /* Reset handling */
 extern int efx_reset(struct efx_nic *efx, enum reset_type method);
 extern void efx_reset_down(struct efx_nic *efx, enum reset_type method);
 extern int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok);

 /* Global */
 extern void efx_schedule_reset(struct efx_nic *efx, enum reset_type type);
 extern int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs,
 				   unsigned int rx_usecs, bool rx_adaptive,
 				   bool rx_may_override_tx);
 extern void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs,
 				   unsigned int *rx_usecs, bool *rx_adaptive);

 /* Dummy PHY ops for PHY drivers */
 extern int efx_port_dummy_op_int(struct efx_nic *efx);
 extern void efx_port_dummy_op_void(struct efx_nic *efx);


 /* MTD */
 #ifdef CONFIG_SFC_MTD
 extern int efx_mtd_probe(struct efx_nic *efx);
 extern void efx_mtd_rename(struct efx_nic *efx);
 extern void efx_mtd_remove(struct efx_nic *efx);
 #else
 static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; }
 static inline void efx_mtd_rename(struct efx_nic *efx) {}
 static inline void efx_mtd_remove(struct efx_nic *efx) {}
 #endif

 static inline void efx_schedule_channel(struct efx_channel *channel)
 {
 	netif_vdbg(channel->efx, intr, channel->efx->net_dev,
 		   "channel %d scheduling NAPI poll on CPU%d\n",
 		   channel->channel, raw_smp_processor_id());
 	channel->work_pending = true;

 	napi_schedule(&channel->napi_str);
 }

 static inline void efx_schedule_channel_irq(struct efx_channel *channel)
 {
 	channel->event_test_cpu = raw_smp_processor_id();
 	efx_schedule_channel(channel);
 }

 extern void efx_link_status_changed(struct efx_nic *efx);
 extern void efx_link_set_advertising(struct efx_nic *efx, u32);
 extern void efx_link_set_wanted_fc(struct efx_nic *efx, u8);

 static inline void efx_device_detach_sync(struct efx_nic *efx)
 {
 	struct net_device *dev = efx->net_dev;

 	/* Lock/freeze all TX queues so that we can be sure the
 	 * TX scheduler is stopped when we're done and before
 	 * netif_device_present() becomes false.
 	 */
 	netif_tx_lock(dev);
 	netif_device_detach(dev);
 	netif_tx_unlock(dev);
 }

 #endif /* EFX_EFX_H */
	/****************************************************************************
	* Driver for Solarflare Solarstorm network controllers and boards
	* Copyright 2005-2006 Fen Systems Ltd.
	* Copyright 2006-2010 Solarflare Communications Inc.
	*
	* This program is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 as published
	* by the Free Software Foundation, incorporated herein by reference.
	*/

	#ifndef EFX_EFX_H
	#define EFX_EFX_H

	#include "net_driver.h"
	#include "filter.h"

	/* Solarstorm controllers use BAR 0 for I/O space and BAR 2(&3) for memory */
	#define EFX_MEM_BAR 2

	/* TX */
	extern int efx_probe_tx_queue(struct efx_tx_queue *tx_queue);
	extern void efx_remove_tx_queue(struct efx_tx_queue *tx_queue);
	extern void efx_init_tx_queue(struct efx_tx_queue *tx_queue);
	extern void efx_init_tx_queue_core_txq(struct efx_tx_queue *tx_queue);
	extern void efx_fini_tx_queue(struct efx_tx_queue *tx_queue);
	extern void efx_release_tx_buffers(struct efx_tx_queue *tx_queue);
	extern netdev_tx_t
	efx_hard_start_xmit(struct sk_buff skb, struct net_device net_dev);
	extern netdev_tx_t
	efx_enqueue_skb(struct efx_tx_queue tx_queue, struct sk_buff skb);
	extern void efx_xmit_done(struct efx_tx_queue *tx_queue, unsigned int index);
	extern int efx_setup_tc(struct net_device *net_dev, u8 num_tc);
	extern unsigned int efx_tx_max_skb_descs(struct efx_nic *efx);

	/* RX */
	extern int efx_probe_rx_queue(struct efx_rx_queue *rx_queue);
	extern void efx_remove_rx_queue(struct efx_rx_queue *rx_queue);
	extern void efx_init_rx_queue(struct efx_rx_queue *rx_queue);
	extern void efx_fini_rx_queue(struct efx_rx_queue *rx_queue);
	extern void efx_rx_strategy(struct efx_channel *channel);
	extern void efx_fast_push_rx_descriptors(struct efx_rx_queue *rx_queue);
	extern void efx_rx_slow_fill(unsigned long context);
	extern void __efx_rx_packet(struct efx_channel *channel,
	struct efx_rx_buffer *rx_buf);
	extern void efx_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index,
	unsigned int len, u16 flags);
	extern void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);

	#define EFX_MAX_DMAQ_SIZE 4096UL
	#define EFX_DEFAULT_DMAQ_SIZE 1024UL
	#define EFX_MIN_DMAQ_SIZE 512UL

	#define EFX_MAX_EVQ_SIZE 16384UL
	#define EFX_MIN_EVQ_SIZE 512UL

	/* Maximum number of TCP segments we support for soft-TSO */
	#define EFX_TSO_MAX_SEGS 100

	/* The smallest [rt]xq_entries that the driver supports. RX minimum
	* is a bit arbitrary. For TX, we must have space for at least 2
	* TSO skbs.
	*/
	#define EFX_RXQ_MIN_ENT 128U
	#define EFX_TXQ_MIN_ENT(efx) (2 * efx_tx_max_skb_descs(efx))

	/* Filters */
	extern int efx_probe_filters(struct efx_nic *efx);
	extern void efx_restore_filters(struct efx_nic *efx);
	extern void efx_remove_filters(struct efx_nic *efx);
	extern s32 efx_filter_insert_filter(struct efx_nic *efx,
	struct efx_filter_spec *spec,
	bool replace);
	extern int efx_filter_remove_id_safe(struct efx_nic *efx,
	enum efx_filter_priority priority,
	u32 filter_id);
	extern int efx_filter_get_filter_safe(struct efx_nic *efx,
	enum efx_filter_priority priority,
	u32 filter_id, struct efx_filter_spec *);
	extern void efx_filter_clear_rx(struct efx_nic *efx,
	enum efx_filter_priority priority);
	extern u32 efx_filter_count_rx_used(struct efx_nic *efx,
	enum efx_filter_priority priority);
	extern u32 efx_filter_get_rx_id_limit(struct efx_nic *efx);
	extern s32 efx_filter_get_rx_ids(struct efx_nic *efx,
	enum efx_filter_priority priority,
	u32 *buf, u32 size);
	#ifdef CONFIG_RFS_ACCEL
	extern int efx_filter_rfs(struct net_device net_dev, const struct sk_buff skb,
	u16 rxq_index, u32 flow_id);
	extern bool __efx_filter_rfs_expire(struct efx_nic *efx, unsigned quota);
	static inline void efx_filter_rfs_expire(struct efx_channel *channel)
	{
	if (channel->rfs_filters_added >= 60 &&
	__efx_filter_rfs_expire(channel->efx, 100))
	channel->rfs_filters_added -= 60;
	}
	#define efx_filter_rfs_enabled() 1
	#else
	static inline void efx_filter_rfs_expire(struct efx_channel *channel) {}
	#define efx_filter_rfs_enabled() 0
	#endif

	/* Channels */
	extern int efx_channel_dummy_op_int(struct efx_channel *channel);
	extern void efx_channel_dummy_op_void(struct efx_channel *channel);
	extern void efx_process_channel_now(struct efx_channel *channel);
	extern int
	efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries);

	/* Ports */
	extern int efx_reconfigure_port(struct efx_nic *efx);
	extern int __efx_reconfigure_port(struct efx_nic *efx);

	/* Ethtool support */
	extern const struct ethtool_ops efx_ethtool_ops;

	/* Reset handling */
	extern int efx_reset(struct efx_nic *efx, enum reset_type method);
	extern void efx_reset_down(struct efx_nic *efx, enum reset_type method);
	extern int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok);

	/* Global */
	extern void efx_schedule_reset(struct efx_nic *efx, enum reset_type type);
	extern int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs,
	unsigned int rx_usecs, bool rx_adaptive,
	bool rx_may_override_tx);
	extern void efx_get_irq_moderation(struct efx_nic efx, unsigned int tx_usecs,
	unsigned int rx_usecs, bool rx_adaptive);

	/* Dummy PHY ops for PHY drivers */
	extern int efx_port_dummy_op_int(struct efx_nic *efx);
	extern void efx_port_dummy_op_void(struct efx_nic *efx);


	/* MTD */
	#ifdef CONFIG_SFC_MTD
	extern int efx_mtd_probe(struct efx_nic *efx);
	extern void efx_mtd_rename(struct efx_nic *efx);
	extern void efx_mtd_remove(struct efx_nic *efx);
	#else
	static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; }
	static inline void efx_mtd_rename(struct efx_nic *efx) {}
	static inline void efx_mtd_remove(struct efx_nic *efx) {}
	#endif

	static inline void efx_schedule_channel(struct efx_channel *channel)
	{
	netif_vdbg(channel->efx, intr, channel->efx->net_dev,
	"channel %d scheduling NAPI poll on CPU%d\n",
	channel->channel, raw_smp_processor_id());
	channel->work_pending = true;

	napi_schedule(&channel->napi_str);
	}

	static inline void efx_schedule_channel_irq(struct efx_channel *channel)
	{
	channel->event_test_cpu = raw_smp_processor_id();
	efx_schedule_channel(channel);
	}

	extern void efx_link_status_changed(struct efx_nic *efx);
	extern void efx_link_set_advertising(struct efx_nic *efx, u32);
	extern void efx_link_set_wanted_fc(struct efx_nic *efx, u8);

	static inline void efx_device_detach_sync(struct efx_nic *efx)
	{
	struct net_device *dev = efx->net_dev;

	/* Lock/freeze all TX queues so that we can be sure the
	* TX scheduler is stopped when we're done and before
	* netif_device_present() becomes false.
	*/
	netif_tx_lock(dev);
	netif_device_detach(dev);
	netif_tx_unlock(dev);
	}

	#endif /* EFX_EFX_H */