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1 | /**************************************************************************** |
2 | * Driver for Solarflare Solarstorm network controllers and boards | |
3 | * Copyright 2005-2010 Solarflare Communications Inc. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU General Public License version 2 as published | |
7 | * by the Free Software Foundation, incorporated herein by reference. | |
8 | */ | |
9 | ||
10 | #ifndef EFX_FILTER_H | |
11 | #define EFX_FILTER_H | |
12 | ||
13 | #include <linux/types.h> | |
14 | ||
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15 | /** |
16 | * enum efx_filter_type - type of hardware filter | |
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17 | * @EFX_FILTER_TCP_FULL: Matching TCP/IPv4 4-tuple |
18 | * @EFX_FILTER_TCP_WILD: Matching TCP/IPv4 destination (host, port) | |
19 | * @EFX_FILTER_UDP_FULL: Matching UDP/IPv4 4-tuple | |
20 | * @EFX_FILTER_UDP_WILD: Matching UDP/IPv4 destination (host, port) | |
21 | * @EFX_FILTER_MAC_FULL: Matching Ethernet destination MAC address, VID | |
22 | * @EFX_FILTER_MAC_WILD: Matching Ethernet destination MAC address | |
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23 | * @EFX_FILTER_UC_DEF: Matching all otherwise unmatched unicast |
24 | * @EFX_FILTER_MC_DEF: Matching all otherwise unmatched multicast | |
c39d35eb | 25 | * @EFX_FILTER_UNSPEC: Match type is unspecified |
64eebcfd | 26 | * |
c39d35eb | 27 | * Falcon NICs only support the TCP/IPv4 and UDP/IPv4 filter types. |
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28 | */ |
29 | enum efx_filter_type { | |
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30 | EFX_FILTER_TCP_FULL = 0, |
31 | EFX_FILTER_TCP_WILD, | |
32 | EFX_FILTER_UDP_FULL, | |
33 | EFX_FILTER_UDP_WILD, | |
34 | EFX_FILTER_MAC_FULL = 4, | |
35 | EFX_FILTER_MAC_WILD, | |
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36 | EFX_FILTER_UC_DEF = 8, |
37 | EFX_FILTER_MC_DEF, | |
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38 | EFX_FILTER_TYPE_COUNT, /* number of specific types */ |
39 | EFX_FILTER_UNSPEC = 0xf, | |
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40 | }; |
41 | ||
42 | /** | |
43 | * enum efx_filter_priority - priority of a hardware filter specification | |
44 | * @EFX_FILTER_PRI_HINT: Performance hint | |
45 | * @EFX_FILTER_PRI_MANUAL: Manually configured filter | |
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46 | * @EFX_FILTER_PRI_REQUIRED: Required for correct behaviour (user-level |
47 | * networking and SR-IOV) | |
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48 | */ |
49 | enum efx_filter_priority { | |
50 | EFX_FILTER_PRI_HINT = 0, | |
51 | EFX_FILTER_PRI_MANUAL, | |
52 | EFX_FILTER_PRI_REQUIRED, | |
53 | }; | |
54 | ||
55 | /** | |
56 | * enum efx_filter_flags - flags for hardware filter specifications | |
57 | * @EFX_FILTER_FLAG_RX_RSS: Use RSS to spread across multiple queues. | |
58 | * By default, matching packets will be delivered only to the | |
59 | * specified queue. If this flag is set, they will be delivered | |
60 | * to a range of queues offset from the specified queue number | |
61 | * according to the indirection table. | |
62 | * @EFX_FILTER_FLAG_RX_SCATTER: Enable DMA scatter on the receiving | |
63 | * queue. | |
c39d35eb | 64 | * @EFX_FILTER_FLAG_RX: Filter is for RX |
3d885e39 | 65 | * @EFX_FILTER_FLAG_TX: Filter is for TX |
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66 | */ |
67 | enum efx_filter_flags { | |
68 | EFX_FILTER_FLAG_RX_RSS = 0x01, | |
69 | EFX_FILTER_FLAG_RX_SCATTER = 0x02, | |
c39d35eb | 70 | EFX_FILTER_FLAG_RX = 0x08, |
3d885e39 | 71 | EFX_FILTER_FLAG_TX = 0x10, |
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72 | }; |
73 | ||
74 | /** | |
75 | * struct efx_filter_spec - specification for a hardware filter | |
76 | * @type: Type of match to be performed, from &enum efx_filter_type | |
77 | * @priority: Priority of the filter, from &enum efx_filter_priority | |
78 | * @flags: Miscellaneous flags, from &enum efx_filter_flags | |
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79 | * @dmaq_id: Source/target queue index, or %EFX_FILTER_RX_DMAQ_ID_DROP for |
80 | * an RX drop filter | |
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81 | * @data: Match data (type-dependent) |
82 | * | |
83 | * Use the efx_filter_set_*() functions to initialise the @type and | |
84 | * @data fields. | |
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85 | * |
86 | * The @priority field is used by software to determine whether a new | |
87 | * filter may replace an old one. The hardware priority of a filter | |
9e0f9a10 | 88 | * depends on the filter type. |
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89 | */ |
90 | struct efx_filter_spec { | |
91 | u8 type:4; | |
92 | u8 priority:4; | |
93 | u8 flags; | |
94 | u16 dmaq_id; | |
95 | u32 data[3]; | |
96 | }; | |
97 | ||
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98 | enum { |
99 | EFX_FILTER_RX_DMAQ_ID_DROP = 0xfff | |
100 | }; | |
101 | ||
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102 | static inline void efx_filter_init_rx(struct efx_filter_spec *spec, |
103 | enum efx_filter_priority priority, | |
104 | enum efx_filter_flags flags, | |
105 | unsigned rxq_id) | |
64eebcfd | 106 | { |
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107 | spec->type = EFX_FILTER_UNSPEC; |
108 | spec->priority = priority; | |
109 | spec->flags = EFX_FILTER_FLAG_RX | flags; | |
110 | spec->dmaq_id = rxq_id; | |
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111 | } |
112 | ||
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113 | static inline void efx_filter_init_tx(struct efx_filter_spec *spec, |
114 | unsigned txq_id) | |
115 | { | |
116 | spec->type = EFX_FILTER_UNSPEC; | |
117 | spec->priority = EFX_FILTER_PRI_REQUIRED; | |
118 | spec->flags = EFX_FILTER_FLAG_TX; | |
119 | spec->dmaq_id = txq_id; | |
120 | } | |
121 | ||
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122 | extern int efx_filter_set_ipv4_local(struct efx_filter_spec *spec, u8 proto, |
123 | __be32 host, __be16 port); | |
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124 | extern int efx_filter_get_ipv4_local(const struct efx_filter_spec *spec, |
125 | u8 *proto, __be32 *host, __be16 *port); | |
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126 | extern int efx_filter_set_ipv4_full(struct efx_filter_spec *spec, u8 proto, |
127 | __be32 host, __be16 port, | |
128 | __be32 rhost, __be16 rport); | |
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129 | extern int efx_filter_get_ipv4_full(const struct efx_filter_spec *spec, |
130 | u8 *proto, __be32 *host, __be16 *port, | |
131 | __be32 *rhost, __be16 *rport); | |
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132 | extern int efx_filter_set_eth_local(struct efx_filter_spec *spec, |
133 | u16 vid, const u8 *addr); | |
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134 | extern int efx_filter_get_eth_local(const struct efx_filter_spec *spec, |
135 | u16 *vid, u8 *addr); | |
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136 | extern int efx_filter_set_uc_def(struct efx_filter_spec *spec); |
137 | extern int efx_filter_set_mc_def(struct efx_filter_spec *spec); | |
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138 | enum { |
139 | EFX_FILTER_VID_UNSPEC = 0xffff, | |
140 | }; | |
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141 | |
142 | #endif /* EFX_FILTER_H */ |