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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 | |
23 | * @EFX_FILTER_UNSPEC: Match type is unspecified | |
64eebcfd | 24 | * |
c39d35eb | 25 | * Falcon NICs only support the TCP/IPv4 and UDP/IPv4 filter types. |
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26 | */ |
27 | enum efx_filter_type { | |
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28 | EFX_FILTER_TCP_FULL = 0, |
29 | EFX_FILTER_TCP_WILD, | |
30 | EFX_FILTER_UDP_FULL, | |
31 | EFX_FILTER_UDP_WILD, | |
32 | EFX_FILTER_MAC_FULL = 4, | |
33 | EFX_FILTER_MAC_WILD, | |
34 | EFX_FILTER_TYPE_COUNT, /* number of specific types */ | |
35 | EFX_FILTER_UNSPEC = 0xf, | |
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36 | }; |
37 | ||
38 | /** | |
39 | * enum efx_filter_priority - priority of a hardware filter specification | |
40 | * @EFX_FILTER_PRI_HINT: Performance hint | |
41 | * @EFX_FILTER_PRI_MANUAL: Manually configured filter | |
42 | * @EFX_FILTER_PRI_REQUIRED: Required for correct behaviour | |
43 | */ | |
44 | enum efx_filter_priority { | |
45 | EFX_FILTER_PRI_HINT = 0, | |
46 | EFX_FILTER_PRI_MANUAL, | |
47 | EFX_FILTER_PRI_REQUIRED, | |
48 | }; | |
49 | ||
50 | /** | |
51 | * enum efx_filter_flags - flags for hardware filter specifications | |
52 | * @EFX_FILTER_FLAG_RX_RSS: Use RSS to spread across multiple queues. | |
53 | * By default, matching packets will be delivered only to the | |
54 | * specified queue. If this flag is set, they will be delivered | |
55 | * to a range of queues offset from the specified queue number | |
56 | * according to the indirection table. | |
57 | * @EFX_FILTER_FLAG_RX_SCATTER: Enable DMA scatter on the receiving | |
58 | * queue. | |
59 | * @EFX_FILTER_FLAG_RX_OVERRIDE_IP: Enables a MAC filter to override | |
60 | * any IP filter that matches the same packet. By default, IP | |
61 | * filters take precedence. | |
c39d35eb | 62 | * @EFX_FILTER_FLAG_RX: Filter is for RX |
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63 | */ |
64 | enum efx_filter_flags { | |
65 | EFX_FILTER_FLAG_RX_RSS = 0x01, | |
66 | EFX_FILTER_FLAG_RX_SCATTER = 0x02, | |
67 | EFX_FILTER_FLAG_RX_OVERRIDE_IP = 0x04, | |
c39d35eb | 68 | EFX_FILTER_FLAG_RX = 0x08, |
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69 | }; |
70 | ||
71 | /** | |
72 | * struct efx_filter_spec - specification for a hardware filter | |
73 | * @type: Type of match to be performed, from &enum efx_filter_type | |
74 | * @priority: Priority of the filter, from &enum efx_filter_priority | |
75 | * @flags: Miscellaneous flags, from &enum efx_filter_flags | |
76 | * @dmaq_id: Source/target queue index | |
77 | * @data: Match data (type-dependent) | |
78 | * | |
79 | * Use the efx_filter_set_*() functions to initialise the @type and | |
80 | * @data fields. | |
81 | */ | |
82 | struct efx_filter_spec { | |
83 | u8 type:4; | |
84 | u8 priority:4; | |
85 | u8 flags; | |
86 | u16 dmaq_id; | |
87 | u32 data[3]; | |
88 | }; | |
89 | ||
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90 | static inline void efx_filter_init_rx(struct efx_filter_spec *spec, |
91 | enum efx_filter_priority priority, | |
92 | enum efx_filter_flags flags, | |
93 | unsigned rxq_id) | |
64eebcfd | 94 | { |
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95 | spec->type = EFX_FILTER_UNSPEC; |
96 | spec->priority = priority; | |
97 | spec->flags = EFX_FILTER_FLAG_RX | flags; | |
98 | spec->dmaq_id = rxq_id; | |
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99 | } |
100 | ||
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101 | extern int efx_filter_set_ipv4_local(struct efx_filter_spec *spec, u8 proto, |
102 | __be32 host, __be16 port); | |
103 | extern int efx_filter_set_ipv4_full(struct efx_filter_spec *spec, u8 proto, | |
104 | __be32 host, __be16 port, | |
105 | __be32 rhost, __be16 rport); | |
106 | extern int efx_filter_set_eth_local(struct efx_filter_spec *spec, | |
107 | u16 vid, const u8 *addr); | |
108 | enum { | |
109 | EFX_FILTER_VID_UNSPEC = 0xffff, | |
110 | }; | |
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111 | |
112 | #endif /* EFX_FILTER_H */ |