Ben Hutchings | 64eebcf | 2010-09-20 08:43:07 +0000 | [diff] [blame] | 1 | /**************************************************************************** |
Ben Hutchings | f7a6d2c | 2013-08-29 23:32:48 +0100 | [diff] [blame^] | 2 | * Driver for Solarflare network controllers and boards |
| 3 | * Copyright 2005-2013 Solarflare Communications Inc. |
Ben Hutchings | 64eebcf | 2010-09-20 08:43:07 +0000 | [diff] [blame] | 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> |
Ben Hutchings | 7c460d9 | 2012-10-27 00:33:28 +0100 | [diff] [blame] | 14 | #include <linux/if_ether.h> |
| 15 | #include <asm/byteorder.h> |
Ben Hutchings | 64eebcf | 2010-09-20 08:43:07 +0000 | [diff] [blame] | 16 | |
Ben Hutchings | 64eebcf | 2010-09-20 08:43:07 +0000 | [diff] [blame] | 17 | /** |
Ben Hutchings | 7c460d9 | 2012-10-27 00:33:28 +0100 | [diff] [blame] | 18 | * enum efx_filter_match_flags - Flags for hardware filter match type |
| 19 | * @EFX_FILTER_MATCH_REM_HOST: Match by remote IP host address |
| 20 | * @EFX_FILTER_MATCH_LOC_HOST: Match by local IP host address |
| 21 | * @EFX_FILTER_MATCH_REM_MAC: Match by remote MAC address |
| 22 | * @EFX_FILTER_MATCH_REM_PORT: Match by remote TCP/UDP port |
| 23 | * @EFX_FILTER_MATCH_LOC_MAC: Match by local MAC address |
| 24 | * @EFX_FILTER_MATCH_LOC_PORT: Match by local TCP/UDP port |
| 25 | * @EFX_FILTER_MATCH_ETHER_TYPE: Match by Ether-type |
| 26 | * @EFX_FILTER_MATCH_INNER_VID: Match by inner VLAN ID |
| 27 | * @EFX_FILTER_MATCH_OUTER_VID: Match by outer VLAN ID |
| 28 | * @EFX_FILTER_MATCH_IP_PROTO: Match by IP transport protocol |
| 29 | * @EFX_FILTER_MATCH_LOC_MAC_IG: Match by local MAC address I/G bit. |
| 30 | * Used for RX default unicast and multicast/broadcast filters. |
Ben Hutchings | 64eebcf | 2010-09-20 08:43:07 +0000 | [diff] [blame] | 31 | * |
Ben Hutchings | 7c460d9 | 2012-10-27 00:33:28 +0100 | [diff] [blame] | 32 | * Only some combinations are supported, depending on NIC type: |
| 33 | * |
| 34 | * - Falcon supports RX filters matching by {TCP,UDP}/IPv4 4-tuple or |
| 35 | * local 2-tuple (only implemented for Falcon B0) |
| 36 | * |
| 37 | * - Siena supports RX and TX filters matching by {TCP,UDP}/IPv4 4-tuple |
| 38 | * or local 2-tuple, or local MAC with or without outer VID, and RX |
| 39 | * default filters |
| 40 | * |
| 41 | * - Huntington supports filter matching controlled by firmware, potentially |
| 42 | * using {TCP,UDP}/IPv{4,6} 4-tuple or local 2-tuple, local MAC or I/G bit, |
| 43 | * with or without outer and inner VID |
Ben Hutchings | 64eebcf | 2010-09-20 08:43:07 +0000 | [diff] [blame] | 44 | */ |
Ben Hutchings | 7c460d9 | 2012-10-27 00:33:28 +0100 | [diff] [blame] | 45 | enum efx_filter_match_flags { |
| 46 | EFX_FILTER_MATCH_REM_HOST = 0x0001, |
| 47 | EFX_FILTER_MATCH_LOC_HOST = 0x0002, |
| 48 | EFX_FILTER_MATCH_REM_MAC = 0x0004, |
| 49 | EFX_FILTER_MATCH_REM_PORT = 0x0008, |
| 50 | EFX_FILTER_MATCH_LOC_MAC = 0x0010, |
| 51 | EFX_FILTER_MATCH_LOC_PORT = 0x0020, |
| 52 | EFX_FILTER_MATCH_ETHER_TYPE = 0x0040, |
| 53 | EFX_FILTER_MATCH_INNER_VID = 0x0080, |
| 54 | EFX_FILTER_MATCH_OUTER_VID = 0x0100, |
| 55 | EFX_FILTER_MATCH_IP_PROTO = 0x0200, |
| 56 | EFX_FILTER_MATCH_LOC_MAC_IG = 0x0400, |
Ben Hutchings | 64eebcf | 2010-09-20 08:43:07 +0000 | [diff] [blame] | 57 | }; |
| 58 | |
| 59 | /** |
| 60 | * enum efx_filter_priority - priority of a hardware filter specification |
| 61 | * @EFX_FILTER_PRI_HINT: Performance hint |
| 62 | * @EFX_FILTER_PRI_MANUAL: Manually configured filter |
Ben Hutchings | 3d885e3 | 2012-02-06 17:27:52 +0000 | [diff] [blame] | 63 | * @EFX_FILTER_PRI_REQUIRED: Required for correct behaviour (user-level |
| 64 | * networking and SR-IOV) |
Ben Hutchings | 64eebcf | 2010-09-20 08:43:07 +0000 | [diff] [blame] | 65 | */ |
| 66 | enum efx_filter_priority { |
| 67 | EFX_FILTER_PRI_HINT = 0, |
| 68 | EFX_FILTER_PRI_MANUAL, |
| 69 | EFX_FILTER_PRI_REQUIRED, |
| 70 | }; |
| 71 | |
| 72 | /** |
| 73 | * enum efx_filter_flags - flags for hardware filter specifications |
| 74 | * @EFX_FILTER_FLAG_RX_RSS: Use RSS to spread across multiple queues. |
| 75 | * By default, matching packets will be delivered only to the |
| 76 | * specified queue. If this flag is set, they will be delivered |
| 77 | * to a range of queues offset from the specified queue number |
| 78 | * according to the indirection table. |
| 79 | * @EFX_FILTER_FLAG_RX_SCATTER: Enable DMA scatter on the receiving |
| 80 | * queue. |
Ben Hutchings | 8803e15 | 2012-11-19 23:08:20 +0000 | [diff] [blame] | 81 | * @EFX_FILTER_FLAG_RX_STACK: Indicates a filter inserted for the |
| 82 | * network stack. The filter must have a priority of |
| 83 | * %EFX_FILTER_PRI_REQUIRED. It can be steered by a replacement |
| 84 | * request with priority %EFX_FILTER_PRI_MANUAL, and a removal |
| 85 | * request with priority %EFX_FILTER_PRI_MANUAL will reset the |
| 86 | * steering (but not remove the filter). |
Ben Hutchings | c39d35e | 2010-12-07 19:11:26 +0000 | [diff] [blame] | 87 | * @EFX_FILTER_FLAG_RX: Filter is for RX |
Ben Hutchings | 3d885e3 | 2012-02-06 17:27:52 +0000 | [diff] [blame] | 88 | * @EFX_FILTER_FLAG_TX: Filter is for TX |
Ben Hutchings | 64eebcf | 2010-09-20 08:43:07 +0000 | [diff] [blame] | 89 | */ |
| 90 | enum efx_filter_flags { |
| 91 | EFX_FILTER_FLAG_RX_RSS = 0x01, |
| 92 | EFX_FILTER_FLAG_RX_SCATTER = 0x02, |
Ben Hutchings | 8803e15 | 2012-11-19 23:08:20 +0000 | [diff] [blame] | 93 | EFX_FILTER_FLAG_RX_STACK = 0x04, |
Ben Hutchings | c39d35e | 2010-12-07 19:11:26 +0000 | [diff] [blame] | 94 | EFX_FILTER_FLAG_RX = 0x08, |
Ben Hutchings | 3d885e3 | 2012-02-06 17:27:52 +0000 | [diff] [blame] | 95 | EFX_FILTER_FLAG_TX = 0x10, |
Ben Hutchings | 64eebcf | 2010-09-20 08:43:07 +0000 | [diff] [blame] | 96 | }; |
| 97 | |
| 98 | /** |
| 99 | * struct efx_filter_spec - specification for a hardware filter |
Ben Hutchings | 7c460d9 | 2012-10-27 00:33:28 +0100 | [diff] [blame] | 100 | * @match_flags: Match type flags, from &enum efx_filter_match_flags |
Ben Hutchings | 64eebcf | 2010-09-20 08:43:07 +0000 | [diff] [blame] | 101 | * @priority: Priority of the filter, from &enum efx_filter_priority |
| 102 | * @flags: Miscellaneous flags, from &enum efx_filter_flags |
Ben Hutchings | 7c460d9 | 2012-10-27 00:33:28 +0100 | [diff] [blame] | 103 | * @rss_context: RSS context to use, if %EFX_FILTER_FLAG_RX_RSS is set |
Ben Hutchings | f26e958 | 2012-10-30 01:01:52 +0000 | [diff] [blame] | 104 | * @dmaq_id: Source/target queue index, or %EFX_FILTER_RX_DMAQ_ID_DROP for |
| 105 | * an RX drop filter |
Ben Hutchings | 7c460d9 | 2012-10-27 00:33:28 +0100 | [diff] [blame] | 106 | * @outer_vid: Outer VLAN ID to match, if %EFX_FILTER_MATCH_OUTER_VID is set |
| 107 | * @inner_vid: Inner VLAN ID to match, if %EFX_FILTER_MATCH_INNER_VID is set |
| 108 | * @loc_mac: Local MAC address to match, if %EFX_FILTER_MATCH_LOC_MAC or |
| 109 | * %EFX_FILTER_MATCH_LOC_MAC_IG is set |
| 110 | * @rem_mac: Remote MAC address to match, if %EFX_FILTER_MATCH_REM_MAC is set |
| 111 | * @ether_type: Ether-type to match, if %EFX_FILTER_MATCH_ETHER_TYPE is set |
| 112 | * @ip_proto: IP transport protocol to match, if %EFX_FILTER_MATCH_IP_PROTO |
| 113 | * is set |
| 114 | * @loc_host: Local IP host to match, if %EFX_FILTER_MATCH_LOC_HOST is set |
| 115 | * @rem_host: Remote IP host to match, if %EFX_FILTER_MATCH_REM_HOST is set |
| 116 | * @loc_port: Local TCP/UDP port to match, if %EFX_FILTER_MATCH_LOC_PORT is set |
| 117 | * @rem_port: Remote TCP/UDP port to match, if %EFX_FILTER_MATCH_REM_PORT is set |
Ben Hutchings | 64eebcf | 2010-09-20 08:43:07 +0000 | [diff] [blame] | 118 | * |
Ben Hutchings | 7c460d9 | 2012-10-27 00:33:28 +0100 | [diff] [blame] | 119 | * The efx_filter_init_rx() or efx_filter_init_tx() function *must* be |
| 120 | * used to initialise the structure. The efx_filter_set_*() functions |
| 121 | * may then be used to set @rss_context, @match_flags and related |
| 122 | * fields. |
Ben Hutchings | b1f9284 | 2012-01-03 12:05:15 +0000 | [diff] [blame] | 123 | * |
| 124 | * The @priority field is used by software to determine whether a new |
| 125 | * filter may replace an old one. The hardware priority of a filter |
Ben Hutchings | 7c460d9 | 2012-10-27 00:33:28 +0100 | [diff] [blame] | 126 | * depends on which fields are matched. |
Ben Hutchings | 64eebcf | 2010-09-20 08:43:07 +0000 | [diff] [blame] | 127 | */ |
| 128 | struct efx_filter_spec { |
Ben Hutchings | 7c460d9 | 2012-10-27 00:33:28 +0100 | [diff] [blame] | 129 | u32 match_flags:12; |
| 130 | u32 priority:2; |
| 131 | u32 flags:6; |
| 132 | u32 dmaq_id:12; |
| 133 | u32 rss_context; |
| 134 | __be16 outer_vid __aligned(4); /* allow jhash2() of match values */ |
| 135 | __be16 inner_vid; |
| 136 | u8 loc_mac[ETH_ALEN]; |
| 137 | u8 rem_mac[ETH_ALEN]; |
| 138 | __be16 ether_type; |
| 139 | u8 ip_proto; |
| 140 | __be32 loc_host[4]; |
| 141 | __be32 rem_host[4]; |
| 142 | __be16 loc_port; |
| 143 | __be16 rem_port; |
| 144 | /* total 64 bytes */ |
Ben Hutchings | 64eebcf | 2010-09-20 08:43:07 +0000 | [diff] [blame] | 145 | }; |
| 146 | |
Ben Hutchings | f26e958 | 2012-10-30 01:01:52 +0000 | [diff] [blame] | 147 | enum { |
Ben Hutchings | 7c460d9 | 2012-10-27 00:33:28 +0100 | [diff] [blame] | 148 | EFX_FILTER_RSS_CONTEXT_DEFAULT = 0xffffffff, |
Ben Hutchings | f26e958 | 2012-10-30 01:01:52 +0000 | [diff] [blame] | 149 | EFX_FILTER_RX_DMAQ_ID_DROP = 0xfff |
| 150 | }; |
| 151 | |
Ben Hutchings | c39d35e | 2010-12-07 19:11:26 +0000 | [diff] [blame] | 152 | static inline void efx_filter_init_rx(struct efx_filter_spec *spec, |
| 153 | enum efx_filter_priority priority, |
| 154 | enum efx_filter_flags flags, |
| 155 | unsigned rxq_id) |
Ben Hutchings | 64eebcf | 2010-09-20 08:43:07 +0000 | [diff] [blame] | 156 | { |
Ben Hutchings | 7c460d9 | 2012-10-27 00:33:28 +0100 | [diff] [blame] | 157 | memset(spec, 0, sizeof(*spec)); |
Ben Hutchings | c39d35e | 2010-12-07 19:11:26 +0000 | [diff] [blame] | 158 | spec->priority = priority; |
| 159 | spec->flags = EFX_FILTER_FLAG_RX | flags; |
Ben Hutchings | 7c460d9 | 2012-10-27 00:33:28 +0100 | [diff] [blame] | 160 | spec->rss_context = EFX_FILTER_RSS_CONTEXT_DEFAULT; |
Ben Hutchings | c39d35e | 2010-12-07 19:11:26 +0000 | [diff] [blame] | 161 | spec->dmaq_id = rxq_id; |
Ben Hutchings | 64eebcf | 2010-09-20 08:43:07 +0000 | [diff] [blame] | 162 | } |
| 163 | |
Ben Hutchings | 3d885e3 | 2012-02-06 17:27:52 +0000 | [diff] [blame] | 164 | static inline void efx_filter_init_tx(struct efx_filter_spec *spec, |
| 165 | unsigned txq_id) |
| 166 | { |
Ben Hutchings | 7c460d9 | 2012-10-27 00:33:28 +0100 | [diff] [blame] | 167 | memset(spec, 0, sizeof(*spec)); |
Ben Hutchings | 3d885e3 | 2012-02-06 17:27:52 +0000 | [diff] [blame] | 168 | spec->priority = EFX_FILTER_PRI_REQUIRED; |
| 169 | spec->flags = EFX_FILTER_FLAG_TX; |
| 170 | spec->dmaq_id = txq_id; |
| 171 | } |
| 172 | |
Ben Hutchings | 7c460d9 | 2012-10-27 00:33:28 +0100 | [diff] [blame] | 173 | /** |
| 174 | * efx_filter_set_ipv4_local - specify IPv4 host, transport protocol and port |
| 175 | * @spec: Specification to initialise |
| 176 | * @proto: Transport layer protocol number |
| 177 | * @host: Local host address (network byte order) |
| 178 | * @port: Local port (network byte order) |
| 179 | */ |
| 180 | static inline int |
| 181 | efx_filter_set_ipv4_local(struct efx_filter_spec *spec, u8 proto, |
| 182 | __be32 host, __be16 port) |
| 183 | { |
| 184 | spec->match_flags |= |
| 185 | EFX_FILTER_MATCH_ETHER_TYPE | EFX_FILTER_MATCH_IP_PROTO | |
| 186 | EFX_FILTER_MATCH_LOC_HOST | EFX_FILTER_MATCH_LOC_PORT; |
| 187 | spec->ether_type = htons(ETH_P_IP); |
| 188 | spec->ip_proto = proto; |
| 189 | spec->loc_host[0] = host; |
| 190 | spec->loc_port = port; |
| 191 | return 0; |
| 192 | } |
| 193 | |
| 194 | /** |
| 195 | * efx_filter_set_ipv4_full - specify IPv4 hosts, transport protocol and ports |
| 196 | * @spec: Specification to initialise |
| 197 | * @proto: Transport layer protocol number |
| 198 | * @lhost: Local host address (network byte order) |
| 199 | * @lport: Local port (network byte order) |
| 200 | * @rhost: Remote host address (network byte order) |
| 201 | * @rport: Remote port (network byte order) |
| 202 | */ |
| 203 | static inline int |
| 204 | efx_filter_set_ipv4_full(struct efx_filter_spec *spec, u8 proto, |
| 205 | __be32 lhost, __be16 lport, |
| 206 | __be32 rhost, __be16 rport) |
| 207 | { |
| 208 | spec->match_flags |= |
| 209 | EFX_FILTER_MATCH_ETHER_TYPE | EFX_FILTER_MATCH_IP_PROTO | |
| 210 | EFX_FILTER_MATCH_LOC_HOST | EFX_FILTER_MATCH_LOC_PORT | |
| 211 | EFX_FILTER_MATCH_REM_HOST | EFX_FILTER_MATCH_REM_PORT; |
| 212 | spec->ether_type = htons(ETH_P_IP); |
| 213 | spec->ip_proto = proto; |
| 214 | spec->loc_host[0] = lhost; |
| 215 | spec->loc_port = lport; |
| 216 | spec->rem_host[0] = rhost; |
| 217 | spec->rem_port = rport; |
| 218 | return 0; |
| 219 | } |
| 220 | |
Ben Hutchings | c39d35e | 2010-12-07 19:11:26 +0000 | [diff] [blame] | 221 | enum { |
| 222 | EFX_FILTER_VID_UNSPEC = 0xffff, |
| 223 | }; |
Ben Hutchings | 64eebcf | 2010-09-20 08:43:07 +0000 | [diff] [blame] | 224 | |
Ben Hutchings | 7c460d9 | 2012-10-27 00:33:28 +0100 | [diff] [blame] | 225 | /** |
| 226 | * efx_filter_set_eth_local - specify local Ethernet address and/or VID |
| 227 | * @spec: Specification to initialise |
| 228 | * @vid: Outer VLAN ID to match, or %EFX_FILTER_VID_UNSPEC |
| 229 | * @addr: Local Ethernet MAC address, or %NULL |
| 230 | */ |
| 231 | static inline int efx_filter_set_eth_local(struct efx_filter_spec *spec, |
| 232 | u16 vid, const u8 *addr) |
| 233 | { |
| 234 | if (vid == EFX_FILTER_VID_UNSPEC && addr == NULL) |
| 235 | return -EINVAL; |
| 236 | |
| 237 | if (vid != EFX_FILTER_VID_UNSPEC) { |
| 238 | spec->match_flags |= EFX_FILTER_MATCH_OUTER_VID; |
| 239 | spec->outer_vid = htons(vid); |
| 240 | } |
| 241 | if (addr != NULL) { |
| 242 | spec->match_flags |= EFX_FILTER_MATCH_LOC_MAC; |
| 243 | memcpy(spec->loc_mac, addr, ETH_ALEN); |
| 244 | } |
| 245 | return 0; |
| 246 | } |
| 247 | |
| 248 | /** |
| 249 | * efx_filter_set_uc_def - specify matching otherwise-unmatched unicast |
| 250 | * @spec: Specification to initialise |
| 251 | */ |
| 252 | static inline int efx_filter_set_uc_def(struct efx_filter_spec *spec) |
| 253 | { |
| 254 | spec->match_flags |= EFX_FILTER_MATCH_LOC_MAC_IG; |
| 255 | return 0; |
| 256 | } |
| 257 | |
| 258 | /** |
| 259 | * efx_filter_set_mc_def - specify matching otherwise-unmatched multicast |
| 260 | * @spec: Specification to initialise |
| 261 | */ |
| 262 | static inline int efx_filter_set_mc_def(struct efx_filter_spec *spec) |
| 263 | { |
| 264 | spec->match_flags |= EFX_FILTER_MATCH_LOC_MAC_IG; |
| 265 | spec->loc_mac[0] = 1; |
| 266 | return 0; |
| 267 | } |
| 268 | |
Ben Hutchings | 64eebcf | 2010-09-20 08:43:07 +0000 | [diff] [blame] | 269 | #endif /* EFX_FILTER_H */ |