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 */
 21extern int efx_probe_tx_queue(struct efx_tx_queue *tx_queue);
 22extern void efx_remove_tx_queue(struct efx_tx_queue *tx_queue);
 23extern void efx_init_tx_queue(struct efx_tx_queue *tx_queue);
 24extern void efx_init_tx_queue_core_txq(struct efx_tx_queue *tx_queue);
 25extern void efx_fini_tx_queue(struct efx_tx_queue *tx_queue);
 26extern void efx_release_tx_buffers(struct efx_tx_queue *tx_queue);
 27extern netdev_tx_t
 28efx_hard_start_xmit(struct sk_buff *skb, struct net_device *net_dev);
 29extern netdev_tx_t
 30efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb);
 31extern void efx_xmit_done(struct efx_tx_queue *tx_queue, unsigned int index);
 32extern int efx_setup_tc(struct net_device *net_dev, u8 num_tc);
 33extern unsigned int efx_tx_max_skb_descs(struct efx_nic *efx);
 34
 35/* RX */
 36extern int efx_probe_rx_queue(struct efx_rx_queue *rx_queue);
 37extern void efx_remove_rx_queue(struct efx_rx_queue *rx_queue);
 38extern void efx_init_rx_queue(struct efx_rx_queue *rx_queue);
 39extern void efx_fini_rx_queue(struct efx_rx_queue *rx_queue);
 40extern void efx_rx_strategy(struct efx_channel *channel);
 41extern void efx_fast_push_rx_descriptors(struct efx_rx_queue *rx_queue);
 42extern void efx_rx_slow_fill(unsigned long context);
 43extern void __efx_rx_packet(struct efx_channel *channel,
 44			    struct efx_rx_buffer *rx_buf);
 45extern void efx_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index,
 46			  unsigned int len, u16 flags);
 47extern void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
 48
 49#define EFX_MAX_DMAQ_SIZE 4096UL
 50#define EFX_DEFAULT_DMAQ_SIZE 1024UL
 51#define EFX_MIN_DMAQ_SIZE 512UL
 52
 53#define EFX_MAX_EVQ_SIZE 16384UL
 54#define EFX_MIN_EVQ_SIZE 512UL
 55
 56/* Maximum number of TCP segments we support for soft-TSO */
 57#define EFX_TSO_MAX_SEGS	100
 58
 59/* The smallest [rt]xq_entries that the driver supports.  RX minimum
 60 * is a bit arbitrary.  For TX, we must have space for at least 2
 61 * TSO skbs.
 62 */
 63#define EFX_RXQ_MIN_ENT		128U
 64#define EFX_TXQ_MIN_ENT(efx)	(2 * efx_tx_max_skb_descs(efx))
 65
 66/* Filters */
 67extern int efx_probe_filters(struct efx_nic *efx);
 68extern void efx_restore_filters(struct efx_nic *efx);
 69extern void efx_remove_filters(struct efx_nic *efx);
 70extern s32 efx_filter_insert_filter(struct efx_nic *efx,
 71				    struct efx_filter_spec *spec,
 72				    bool replace);
 73extern int efx_filter_remove_id_safe(struct efx_nic *efx,
 74				     enum efx_filter_priority priority,
 75				     u32 filter_id);
 76extern int efx_filter_get_filter_safe(struct efx_nic *efx,
 77				      enum efx_filter_priority priority,
 78				      u32 filter_id, struct efx_filter_spec *);
 79extern void efx_filter_clear_rx(struct efx_nic *efx,
 80				enum efx_filter_priority priority);
 81extern u32 efx_filter_count_rx_used(struct efx_nic *efx,
 82				    enum efx_filter_priority priority);
 83extern u32 efx_filter_get_rx_id_limit(struct efx_nic *efx);
 84extern s32 efx_filter_get_rx_ids(struct efx_nic *efx,
 85				 enum efx_filter_priority priority,
 86				 u32 *buf, u32 size);
 87#ifdef CONFIG_RFS_ACCEL
 88extern int efx_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb,
 89			  u16 rxq_index, u32 flow_id);
 90extern bool __efx_filter_rfs_expire(struct efx_nic *efx, unsigned quota);
 91static inline void efx_filter_rfs_expire(struct efx_channel *channel)
 92{
 93	if (channel->rfs_filters_added >= 60 &&
 94	    __efx_filter_rfs_expire(channel->efx, 100))
 95		channel->rfs_filters_added -= 60;
 96}
 97#define efx_filter_rfs_enabled() 1
 98#else
 99static inline void efx_filter_rfs_expire(struct efx_channel *channel) {}
100#define efx_filter_rfs_enabled() 0
101#endif
102
103/* Channels */
104extern int efx_channel_dummy_op_int(struct efx_channel *channel);
105extern void efx_process_channel_now(struct efx_channel *channel);
106extern int
107efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries);
108
109/* Ports */
110extern int efx_reconfigure_port(struct efx_nic *efx);
111extern int __efx_reconfigure_port(struct efx_nic *efx);
112
113/* Ethtool support */
114extern const struct ethtool_ops efx_ethtool_ops;
115
116/* Reset handling */
117extern int efx_reset(struct efx_nic *efx, enum reset_type method);
118extern void efx_reset_down(struct efx_nic *efx, enum reset_type method);
119extern int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok);
120
121/* Global */
122extern void efx_schedule_reset(struct efx_nic *efx, enum reset_type type);
123extern int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs,
124				   unsigned int rx_usecs, bool rx_adaptive,
125				   bool rx_may_override_tx);
126extern void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs,
127				   unsigned int *rx_usecs, bool *rx_adaptive);
128
129/* Dummy PHY ops for PHY drivers */
130extern int efx_port_dummy_op_int(struct efx_nic *efx);
131extern void efx_port_dummy_op_void(struct efx_nic *efx);
132
133
134/* MTD */
135#ifdef CONFIG_SFC_MTD
136extern int efx_mtd_probe(struct efx_nic *efx);
137extern void efx_mtd_rename(struct efx_nic *efx);
138extern void efx_mtd_remove(struct efx_nic *efx);
139#else
140static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; }
141static inline void efx_mtd_rename(struct efx_nic *efx) {}
142static inline void efx_mtd_remove(struct efx_nic *efx) {}
143#endif
144
145static inline void efx_schedule_channel(struct efx_channel *channel)
146{
147	netif_vdbg(channel->efx, intr, channel->efx->net_dev,
148		   "channel %d scheduling NAPI poll on CPU%d\n",
149		   channel->channel, raw_smp_processor_id());
150	channel->work_pending = true;
151
152	napi_schedule(&channel->napi_str);
153}
154
155static inline void efx_schedule_channel_irq(struct efx_channel *channel)
156{
157	channel->event_test_cpu = raw_smp_processor_id();
158	efx_schedule_channel(channel);
159}
160
161extern void efx_link_status_changed(struct efx_nic *efx);
162extern void efx_link_set_advertising(struct efx_nic *efx, u32);
163extern void efx_link_set_wanted_fc(struct efx_nic *efx, u8);
164
165#endif /* EFX_EFX_H */