[deliverable/linux.git] / drivers / net / ethernet / sfc / efx.h

/****************************************************************************
 * Driver for Solarflare network controllers and boards
 * Copyright 2005-2006 Fen Systems Ltd.
 * Copyright 2006-2013 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 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 void efx_rx_config_page_split(struct efx_nic *efx);
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_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);
extern void efx_rx_packet(struct efx_rx_queue *rx_queue,
			  unsigned int index, unsigned int n_frags,
			  unsigned int len, u16 flags);
static inline void efx_rx_flush_packet(struct efx_channel *channel)
{
	if (channel->rx_pkt_n_frags)
		__efx_rx_packet(channel);
}
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 */

/**
 * efx_filter_insert_filter - add or replace a filter
 * @efx: NIC in which to insert the filter
 * @spec: Specification for the filter
 * @replace_equal: Flag for whether the specified filter may replace an
 *	existing filter with equal priority
 *
 * On success, return the filter ID.
 * On failure, return a negative error code.
 *
 * If existing filters have equal match values to the new filter spec,
 * then the new filter might replace them or the function might fail,
 * as follows.
 *
 * 1. If the existing filters have lower priority, or @replace_equal
 *    is set and they have equal priority, replace them.
 *
 * 2. If the existing filters have higher priority, return -%EPERM.
 *
 * 3. If !efx_filter_is_mc_recipient(@spec), or the NIC does not
 *    support delivery to multiple recipients, return -%EEXIST.
 *
 * This implies that filters for multiple multicast recipients must
 * all be inserted with the same priority and @replace_equal = %false.
 */
static inline s32 efx_filter_insert_filter(struct efx_nic *efx,
					   struct efx_filter_spec *spec,
					   bool replace_equal)
{
	return efx->type->filter_insert(efx, spec, replace_equal);
}

/**
 * efx_filter_remove_id_safe - remove a filter by ID, carefully
 * @efx: NIC from which to remove the filter
 * @priority: Priority of filter, as passed to @efx_filter_insert_filter
 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter
 *
 * This function will range-check @filter_id, so it is safe to call
 * with a value passed from userland.
 */
static inline int efx_filter_remove_id_safe(struct efx_nic *efx,
					    enum efx_filter_priority priority,
					    u32 filter_id)
{
	return efx->type->filter_remove_safe(efx, priority, filter_id);
}

/**
 * efx_filter_get_filter_safe - retrieve a filter by ID, carefully
 * @efx: NIC from which to remove the filter
 * @priority: Priority of filter, as passed to @efx_filter_insert_filter
 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter
 * @spec: Buffer in which to store filter specification
 *
 * This function will range-check @filter_id, so it is safe to call
 * with a value passed from userland.
 */
static inline int
efx_filter_get_filter_safe(struct efx_nic *efx,
			   enum efx_filter_priority priority,
			   u32 filter_id, struct efx_filter_spec *spec)
{
	return efx->type->filter_get_safe(efx, priority, filter_id, spec);
}

/**
 * efx_farch_filter_clear_rx - remove RX filters by priority
 * @efx: NIC from which to remove the filters
 * @priority: Maximum priority to remove
 */
static inline void efx_filter_clear_rx(struct efx_nic *efx,
				       enum efx_filter_priority priority)
{
	return efx->type->filter_clear_rx(efx, priority);
}

static inline u32 efx_filter_count_rx_used(struct efx_nic *efx,
					   enum efx_filter_priority priority)
{
	return efx->type->filter_count_rx_used(efx, priority);
}
static inline u32 efx_filter_get_rx_id_limit(struct efx_nic *efx)
{
	return efx->type->filter_get_rx_id_limit(efx);
}
static inline s32 efx_filter_get_rx_ids(struct efx_nic *efx,
					enum efx_filter_priority priority,
					u32 *buf, u32 size)
{
	return efx->type->filter_get_rx_ids(efx, priority, buf, 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
extern bool efx_filter_is_mc_recipient(const struct efx_filter_spec *spec);

/* Channels */
extern int efx_channel_dummy_op_int(struct efx_channel *channel);
extern void efx_channel_dummy_op_void(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);
extern int efx_try_recovery(struct efx_nic *efx);

/* 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_add(struct efx_nic *efx, struct efx_mtd_partition *parts,
		       size_t n_parts, size_t sizeof_part);
static inline int efx_mtd_probe(struct efx_nic *efx)
{
	return efx->type->mtd_probe(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());

	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_bh(dev);
	netif_device_detach(dev);
	netif_tx_unlock_bh(dev);
}

#endif /* EFX_EFX_H */
Commit	Line	Data
8ceee660	1	/****************************************************************************
f7a6d2c4	2	* Driver for Solarflare network controllers and boards
8ceee660	3	* Copyright 2005-2006 Fen Systems Ltd.
f7a6d2c4	4	* Copyright 2006-2013 Solarflare Communications Inc.
8ceee660 BH	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"
64eebcfd	15	#include "filter.h"
8ceee660	16
dc803df8 BH	17	/* Solarstorm controllers use BAR 0 for I/O space and BAR 2(&3) for memory */
	18	#define EFX_MEM_BAR 2
	19
8ceee660	20	/* TX */
f5e7adc3 BH	21	extern int efx_probe_tx_queue(struct efx_tx_queue *tx_queue);
	22	extern void efx_remove_tx_queue(struct efx_tx_queue *tx_queue);
	23	extern void efx_init_tx_queue(struct efx_tx_queue *tx_queue);
60031fcc	24	extern void efx_init_tx_queue_core_txq(struct efx_tx_queue *tx_queue);
f5e7adc3	25	extern void efx_fini_tx_queue(struct efx_tx_queue *tx_queue);
f5e7adc3 BH	26	extern netdev_tx_t
	27	efx_hard_start_xmit(struct sk_buff skb, struct net_device net_dev);
	28	extern netdev_tx_t
	29	efx_enqueue_skb(struct efx_tx_queue tx_queue, struct sk_buff skb);
59cf09cc	30	extern void efx_xmit_done(struct efx_tx_queue *tx_queue, unsigned int index);
94b274bf	31	extern int efx_setup_tc(struct net_device *net_dev, u8 num_tc);
7e6d06f0	32	extern unsigned int efx_tx_max_skb_descs(struct efx_nic *efx);
8ceee660 BH	33
8ceee660 BH	34	/* RX */
1648a23f	35	extern void efx_rx_config_page_split(struct efx_nic *efx);
f5e7adc3 BH	36	extern int efx_probe_rx_queue(struct efx_rx_queue *rx_queue);
	37	extern void efx_remove_rx_queue(struct efx_rx_queue *rx_queue);
	38	extern void efx_init_rx_queue(struct efx_rx_queue *rx_queue);
	39	extern void efx_fini_rx_queue(struct efx_rx_queue *rx_queue);
f5e7adc3	40	extern void efx_fast_push_rx_descriptors(struct efx_rx_queue *rx_queue);
90d683af	41	extern void efx_rx_slow_fill(unsigned long context);
85740cdf BH	42	extern void __efx_rx_packet(struct efx_channel *channel);
	43	extern void efx_rx_packet(struct efx_rx_queue *rx_queue,
	44	unsigned int index, unsigned int n_frags,
db339569	45	unsigned int len, u16 flags);
ff734ef4 BH	46	static inline void efx_rx_flush_packet(struct efx_channel *channel)
ff734ef4 BH	47	{
85740cdf BH	48	if (channel->rx_pkt_n_frags)
85740cdf BH	49	__efx_rx_packet(channel);
ff734ef4	50	}
90d683af	51	extern void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
ecc910f5 SH	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
8ceee660	59
7e6d06f0 BH	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))
4642610c	69
64eebcfd	70	/* Filters */
add72477 BH	71
	72	/**
	73	* efx_filter_insert_filter - add or replace a filter
	74	* @efx: NIC in which to insert the filter
	75	* @spec: Specification for the filter
	76	* @replace_equal: Flag for whether the specified filter may replace an
	77	* existing filter with equal priority
	78	*
	79	* On success, return the filter ID.
	80	* On failure, return a negative error code.
	81	*
b883d0bd BH	82	* If existing filters have equal match values to the new filter spec,
	83	* then the new filter might replace them or the function might fail,
	84	* as follows.
	85	*
	86	* 1. If the existing filters have lower priority, or @replace_equal
	87	* is set and they have equal priority, replace them.
	88	*
	89	* 2. If the existing filters have higher priority, return -%EPERM.
	90	*
	91	* 3. If !efx_filter_is_mc_recipient(@spec), or the NIC does not
	92	* support delivery to multiple recipients, return -%EEXIST.
	93	*
	94	* This implies that filters for multiple multicast recipients must
	95	* all be inserted with the same priority and @replace_equal = %false.
add72477 BH	96	*/
	97	static inline s32 efx_filter_insert_filter(struct efx_nic *efx,
	98	struct efx_filter_spec *spec,
	99	bool replace_equal)
	100	{
	101	return efx->type->filter_insert(efx, spec, replace_equal);
	102	}
	103
	104	/**
	105	* efx_filter_remove_id_safe - remove a filter by ID, carefully
	106	* @efx: NIC from which to remove the filter
	107	* @priority: Priority of filter, as passed to @efx_filter_insert_filter
	108	* @filter_id: ID of filter, as returned by @efx_filter_insert_filter
	109	*
	110	* This function will range-check @filter_id, so it is safe to call
	111	* with a value passed from userland.
	112	*/
	113	static inline int efx_filter_remove_id_safe(struct efx_nic *efx,
	114	enum efx_filter_priority priority,
	115	u32 filter_id)
	116	{
	117	return efx->type->filter_remove_safe(efx, priority, filter_id);
	118	}
	119
	120	/**
	121	* efx_filter_get_filter_safe - retrieve a filter by ID, carefully
	122	* @efx: NIC from which to remove the filter
	123	* @priority: Priority of filter, as passed to @efx_filter_insert_filter
	124	* @filter_id: ID of filter, as returned by @efx_filter_insert_filter
	125	* @spec: Buffer in which to store filter specification
	126	*
	127	* This function will range-check @filter_id, so it is safe to call
	128	* with a value passed from userland.
	129	*/
	130	static inline int
	131	efx_filter_get_filter_safe(struct efx_nic *efx,
	132	enum efx_filter_priority priority,
	133	u32 filter_id, struct efx_filter_spec *spec)
	134	{
	135	return efx->type->filter_get_safe(efx, priority, filter_id, spec);
	136	}
	137
	138	/**
	139	* efx_farch_filter_clear_rx - remove RX filters by priority
	140	* @efx: NIC from which to remove the filters
	141	* @priority: Maximum priority to remove
	142	*/
	143	static inline void efx_filter_clear_rx(struct efx_nic *efx,
	144	enum efx_filter_priority priority)
	145	{
	146	return efx->type->filter_clear_rx(efx, priority);
	147	}
	148
	149	static inline u32 efx_filter_count_rx_used(struct efx_nic *efx,
	150	enum efx_filter_priority priority)
	151	{
	152	return efx->type->filter_count_rx_used(efx, priority);
	153	}
	154	static inline u32 efx_filter_get_rx_id_limit(struct efx_nic *efx)
	155	{
	156	return efx->type->filter_get_rx_id_limit(efx);
	157	}
	158	static inline s32 efx_filter_get_rx_ids(struct efx_nic *efx,
	159	enum efx_filter_priority priority,
160	u32 *buf, u32 size)
161	{
162	return efx->type->filter_get_rx_ids(efx, priority, buf, size);
163	}
64d8ad6d BH	164	#ifdef CONFIG_RFS_ACCEL
	165	extern int efx_filter_rfs(struct net_device net_dev, const struct sk_buff skb,
	166	u16 rxq_index, u32 flow_id);
	167	extern bool __efx_filter_rfs_expire(struct efx_nic *efx, unsigned quota);
	168	static inline void efx_filter_rfs_expire(struct efx_channel *channel)
	169	{
	170	if (channel->rfs_filters_added >= 60 &&
	171	__efx_filter_rfs_expire(channel->efx, 100))
	172	channel->rfs_filters_added -= 60;
	173	}
	174	#define efx_filter_rfs_enabled() 1
	175	#else
	176	static inline void efx_filter_rfs_expire(struct efx_channel *channel) {}
	177	#define efx_filter_rfs_enabled() 0
	178	#endif
b883d0bd	179	extern bool efx_filter_is_mc_recipient(const struct efx_filter_spec *spec);
64eebcfd	180
8ceee660	181	/* Channels */
7f967c01	182	extern int efx_channel_dummy_op_int(struct efx_channel *channel);
c31e5f9f	183	extern void efx_channel_dummy_op_void(struct efx_channel *channel);
4642610c BH	184	extern int
4642610c BH	185	efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries);
8ceee660 BH	186
8ceee660 BH	187	/* Ports */
d3245b28 BH	188	extern int efx_reconfigure_port(struct efx_nic *efx);
d3245b28 BH	189	extern int __efx_reconfigure_port(struct efx_nic *efx);
8c8661e4	190
f5e7adc3	191	/* Ethtool support */
f5e7adc3 BH	192	extern const struct ethtool_ops efx_ethtool_ops;
f5e7adc3 BH	193
8c8661e4	194	/* Reset handling */
eb9f6744	195	extern int efx_reset(struct efx_nic *efx, enum reset_type method);
d3245b28 BH	196	extern void efx_reset_down(struct efx_nic *efx, enum reset_type method);
d3245b28 BH	197	extern int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok);
b28405b0	198	extern int efx_try_recovery(struct efx_nic *efx);
8ceee660 BH	199
	200	/* Global */
	201	extern void efx_schedule_reset(struct efx_nic *efx, enum reset_type type);
9e393b30 BH	202	extern int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs,
	203	unsigned int rx_usecs, bool rx_adaptive,
	204	bool rx_may_override_tx);
a0c4faf5 BH	205	extern void efx_get_irq_moderation(struct efx_nic efx, unsigned int tx_usecs,
a0c4faf5 BH	206	unsigned int rx_usecs, bool rx_adaptive);
8ceee660 BH	207
	208	/* Dummy PHY ops for PHY drivers */
	209	extern int efx_port_dummy_op_int(struct efx_nic *efx);
	210	extern void efx_port_dummy_op_void(struct efx_nic *efx);
d215697f	211
8ceee660	212
f4150724 BH	213	/* MTD */
f4150724 BH	214	#ifdef CONFIG_SFC_MTD
45a3fd55 BH	215	extern int efx_mtd_add(struct efx_nic efx, struct efx_mtd_partition parts,
	216	size_t n_parts, size_t sizeof_part);
	217	static inline int efx_mtd_probe(struct efx_nic *efx)
	218	{
	219	return efx->type->mtd_probe(efx);
	220	}
f4150724 BH	221	extern void efx_mtd_rename(struct efx_nic *efx);
	222	extern void efx_mtd_remove(struct efx_nic *efx);
	223	#else
	224	static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; }
	225	static inline void efx_mtd_rename(struct efx_nic *efx) {}
	226	static inline void efx_mtd_remove(struct efx_nic *efx) {}
	227	#endif
8ceee660	228
8ceee660 BH	229	static inline void efx_schedule_channel(struct efx_channel *channel)
8ceee660 BH	230	{
62776d03 BH	231	netif_vdbg(channel->efx, intr, channel->efx->net_dev,
	232	"channel %d scheduling NAPI poll on CPU%d\n",
	233	channel->channel, raw_smp_processor_id());
8ceee660	234
288379f0	235	napi_schedule(&channel->napi_str);
8ceee660 BH	236	}
8ceee660 BH	237
1646a6f3 BH	238	static inline void efx_schedule_channel_irq(struct efx_channel *channel)
1646a6f3 BH	239	{
dd40781e	240	channel->event_test_cpu = raw_smp_processor_id();
1646a6f3 BH	241	efx_schedule_channel(channel);
	242	}
	243
fdaa9aed	244	extern void efx_link_status_changed(struct efx_nic *efx);
d3245b28	245	extern void efx_link_set_advertising(struct efx_nic *efx, u32);
b5626946	246	extern void efx_link_set_wanted_fc(struct efx_nic *efx, u8);
fdaa9aed	247
c2f3b8e3 DP	248	static inline void efx_device_detach_sync(struct efx_nic *efx)
	249	{
	250	struct net_device *dev = efx->net_dev;
	251
	252	/* Lock/freeze all TX queues so that we can be sure the
	253	* TX scheduler is stopped when we're done and before
	254	* netif_device_present() becomes false.
	255	*/
35205b21	256	netif_tx_lock_bh(dev);
c2f3b8e3	257	netif_device_detach(dev);
35205b21	258	netif_tx_unlock_bh(dev);
c2f3b8e3 DP	259	}
c2f3b8e3 DP	260
8ceee660	261	#endif /* EFX_EFX_H */