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 <linux/indirect_call_wrapper.h>
12#include "net_driver.h"
13#include "filter.h"
14
15/* TX */
16void efx_siena_init_tx_queue_core_txq(struct efx_tx_queue *tx_queue);
17netdev_tx_t efx_siena_hard_start_xmit(struct sk_buff *skb,
18				      struct net_device *net_dev);
19netdev_tx_t __efx_siena_enqueue_skb(struct efx_tx_queue *tx_queue,
20				    struct sk_buff *skb);
21static inline netdev_tx_t efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb)
22{
23	return INDIRECT_CALL_1(tx_queue->efx->type->tx_enqueue,
24			       __efx_siena_enqueue_skb, tx_queue, skb);
25}
26int efx_siena_setup_tc(struct net_device *net_dev, enum tc_setup_type type,
27		       void *type_data);
28
29/* RX */
30void __efx_siena_rx_packet(struct efx_channel *channel);
31void efx_siena_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index,
32			 unsigned int n_frags, unsigned int len, u16 flags);
33static inline void efx_rx_flush_packet(struct efx_channel *channel)
34{
35	if (channel->rx_pkt_n_frags)
36		__efx_siena_rx_packet(channel);
37}
38
39/* Maximum number of TCP segments we support for soft-TSO */
40#define EFX_TSO_MAX_SEGS	100
41
42/* The smallest [rt]xq_entries that the driver supports.  RX minimum
43 * is a bit arbitrary.  For TX, we must have space for at least 2
44 * TSO skbs.
45 */
46#define EFX_RXQ_MIN_ENT		128U
47#define EFX_TXQ_MIN_ENT(efx)	(2 * efx_siena_tx_max_skb_descs(efx))
48
49/* All EF10 architecture NICs steal one bit of the DMAQ size for various
50 * other purposes when counting TxQ entries, so we halve the queue size.
51 */
52#define EFX_TXQ_MAX_ENT(efx)	(EFX_WORKAROUND_EF10(efx) ? \
53				 EFX_MAX_DMAQ_SIZE / 2 : EFX_MAX_DMAQ_SIZE)
54
55static inline bool efx_rss_enabled(struct efx_nic *efx)
56{
57	return efx->rss_spread > 1;
58}
59
60/* Filters */
61
62/**
63 * efx_filter_insert_filter - add or replace a filter
64 * @efx: NIC in which to insert the filter
65 * @spec: Specification for the filter
66 * @replace_equal: Flag for whether the specified filter may replace an
67 *	existing filter with equal priority
68 *
69 * On success, return the filter ID.
70 * On failure, return a negative error code.
71 *
72 * If existing filters have equal match values to the new filter spec,
73 * then the new filter might replace them or the function might fail,
74 * as follows.
75 *
76 * 1. If the existing filters have lower priority, or @replace_equal
77 *    is set and they have equal priority, replace them.
78 *
79 * 2. If the existing filters have higher priority, return -%EPERM.
80 *
81 * 3. If !efx_siena_filter_is_mc_recipient(@spec), or the NIC does not
82 *    support delivery to multiple recipients, return -%EEXIST.
83 *
84 * This implies that filters for multiple multicast recipients must
85 * all be inserted with the same priority and @replace_equal = %false.
86 */
87static inline s32 efx_filter_insert_filter(struct efx_nic *efx,
88					   struct efx_filter_spec *spec,
89					   bool replace_equal)
90{
91	return efx->type->filter_insert(efx, spec, replace_equal);
92}
93
94/**
95 * efx_filter_remove_id_safe - remove a filter by ID, carefully
96 * @efx: NIC from which to remove the filter
97 * @priority: Priority of filter, as passed to @efx_filter_insert_filter
98 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter
99 *
100 * This function will range-check @filter_id, so it is safe to call
101 * with a value passed from userland.
102 */
103static inline int efx_filter_remove_id_safe(struct efx_nic *efx,
104					    enum efx_filter_priority priority,
105					    u32 filter_id)
106{
107	return efx->type->filter_remove_safe(efx, priority, filter_id);
108}
109
110/**
111 * efx_filter_get_filter_safe - retrieve a filter by ID, carefully
112 * @efx: NIC from which to remove the filter
113 * @priority: Priority of filter, as passed to @efx_filter_insert_filter
114 * @filter_id: ID of filter, as returned by @efx_filter_insert_filter
115 * @spec: Buffer in which to store filter specification
116 *
117 * This function will range-check @filter_id, so it is safe to call
118 * with a value passed from userland.
119 */
120static inline int
121efx_filter_get_filter_safe(struct efx_nic *efx,
122			   enum efx_filter_priority priority,
123			   u32 filter_id, struct efx_filter_spec *spec)
124{
125	return efx->type->filter_get_safe(efx, priority, filter_id, spec);
126}
127
128static inline u32 efx_filter_count_rx_used(struct efx_nic *efx,
129					   enum efx_filter_priority priority)
130{
131	return efx->type->filter_count_rx_used(efx, priority);
132}
133static inline u32 efx_filter_get_rx_id_limit(struct efx_nic *efx)
134{
135	return efx->type->filter_get_rx_id_limit(efx);
136}
137static inline s32 efx_filter_get_rx_ids(struct efx_nic *efx,
138					enum efx_filter_priority priority,
139					u32 *buf, u32 size)
140{
141	return efx->type->filter_get_rx_ids(efx, priority, buf, size);
142}
143
144/* RSS contexts */
145static inline bool efx_rss_active(struct efx_rss_context *ctx)
146{
147	return ctx->context_id != EFX_MCDI_RSS_CONTEXT_INVALID;
148}
149
150/* Ethtool support */
151extern const struct ethtool_ops efx_siena_ethtool_ops;
152
153/* Global */
154unsigned int efx_siena_usecs_to_ticks(struct efx_nic *efx, unsigned int usecs);
155int efx_siena_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs,
156				  unsigned int rx_usecs, bool rx_adaptive,
157				  bool rx_may_override_tx);
158void efx_siena_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs,
159				  unsigned int *rx_usecs, bool *rx_adaptive);
160
161/* Update the generic software stats in the passed stats array */
162void efx_siena_update_sw_stats(struct efx_nic *efx, u64 *stats);
163
164/* MTD */
165#ifdef CONFIG_SFC_SIENA_MTD
166int efx_siena_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts,
167		      size_t n_parts, size_t sizeof_part);
168static inline int efx_mtd_probe(struct efx_nic *efx)
169{
170	return efx->type->mtd_probe(efx);
171}
172void efx_siena_mtd_rename(struct efx_nic *efx);
173void efx_siena_mtd_remove(struct efx_nic *efx);
174#else
175static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; }
176static inline void efx_siena_mtd_rename(struct efx_nic *efx) {}
177static inline void efx_siena_mtd_remove(struct efx_nic *efx) {}
178#endif
179
180#ifdef CONFIG_SFC_SIENA_SRIOV
181static inline unsigned int efx_vf_size(struct efx_nic *efx)
182{
183	return 1 << efx->vi_scale;
184}
185#endif
186
187static inline void efx_device_detach_sync(struct efx_nic *efx)
188{
189	struct net_device *dev = efx->net_dev;
190
191	/* Lock/freeze all TX queues so that we can be sure the
192	 * TX scheduler is stopped when we're done and before
193	 * netif_device_present() becomes false.
194	 */
195	netif_tx_lock_bh(dev);
196	netif_device_detach(dev);
197	netif_tx_unlock_bh(dev);
198}
199
200static inline void efx_device_attach_if_not_resetting(struct efx_nic *efx)
201{
202	if ((efx->state != STATE_DISABLED) && !efx->reset_pending)
203		netif_device_attach(efx->net_dev);
204}
205
206static inline bool efx_rwsem_assert_write_locked(struct rw_semaphore *sem)
207{
208	if (WARN_ON(down_read_trylock(sem))) {
209		up_read(sem);
210		return false;
211	}
212	return true;
213}
214
215int efx_siena_xdp_tx_buffers(struct efx_nic *efx, int n,
216			     struct xdp_frame **xdpfs, bool flush);
217
218#endif /* EFX_EFX_H */
219