1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /**************************************************************************** 3 * Driver for Solarflare network controllers and boards 4 * Copyright 2005-2013 Solarflare Communications Inc. 5 */ 6 7 #ifndef EFX_FILTER_H 8 #define EFX_FILTER_H 9 10 #include <linux/types.h> 11 #include <linux/if_ether.h> 12 #include <asm/byteorder.h> 13 14 /** 15 * enum efx_filter_match_flags - Flags for hardware filter match type 16 * @EFX_FILTER_MATCH_REM_HOST: Match by remote IP host address 17 * @EFX_FILTER_MATCH_LOC_HOST: Match by local IP host address 18 * @EFX_FILTER_MATCH_REM_MAC: Match by remote MAC address 19 * @EFX_FILTER_MATCH_REM_PORT: Match by remote TCP/UDP port 20 * @EFX_FILTER_MATCH_LOC_MAC: Match by local MAC address 21 * @EFX_FILTER_MATCH_LOC_PORT: Match by local TCP/UDP port 22 * @EFX_FILTER_MATCH_ETHER_TYPE: Match by Ether-type 23 * @EFX_FILTER_MATCH_INNER_VID: Match by inner VLAN ID 24 * @EFX_FILTER_MATCH_OUTER_VID: Match by outer VLAN ID 25 * @EFX_FILTER_MATCH_IP_PROTO: Match by IP transport protocol 26 * @EFX_FILTER_MATCH_LOC_MAC_IG: Match by local MAC address I/G bit. 27 * @EFX_FILTER_MATCH_ENCAP_TYPE: Match by encapsulation type. 28 * Used for RX default unicast and multicast/broadcast filters. 29 * 30 * Only some combinations are supported, depending on NIC type: 31 * 32 * - Falcon supports RX filters matching by {TCP,UDP}/IPv4 4-tuple or 33 * local 2-tuple (only implemented for Falcon B0) 34 * 35 * - Siena supports RX and TX filters matching by {TCP,UDP}/IPv4 4-tuple 36 * or local 2-tuple, or local MAC with or without outer VID, and RX 37 * default filters 38 * 39 * - Huntington supports filter matching controlled by firmware, potentially 40 * using {TCP,UDP}/IPv{4,6} 4-tuple or local 2-tuple, local MAC or I/G bit, 41 * with or without outer and inner VID 42 */ 43 enum efx_filter_match_flags { 44 EFX_FILTER_MATCH_REM_HOST = 0x0001, 45 EFX_FILTER_MATCH_LOC_HOST = 0x0002, 46 EFX_FILTER_MATCH_REM_MAC = 0x0004, 47 EFX_FILTER_MATCH_REM_PORT = 0x0008, 48 EFX_FILTER_MATCH_LOC_MAC = 0x0010, 49 EFX_FILTER_MATCH_LOC_PORT = 0x0020, 50 EFX_FILTER_MATCH_ETHER_TYPE = 0x0040, 51 EFX_FILTER_MATCH_INNER_VID = 0x0080, 52 EFX_FILTER_MATCH_OUTER_VID = 0x0100, 53 EFX_FILTER_MATCH_IP_PROTO = 0x0200, 54 EFX_FILTER_MATCH_LOC_MAC_IG = 0x0400, 55 EFX_FILTER_MATCH_ENCAP_TYPE = 0x0800, 56 }; 57 58 /** 59 * enum efx_filter_priority - priority of a hardware filter specification 60 * @EFX_FILTER_PRI_HINT: Performance hint 61 * @EFX_FILTER_PRI_AUTO: Automatic filter based on device address list 62 * or hardware requirements. This may only be used by the filter 63 * implementation for each NIC type. 64 * @EFX_FILTER_PRI_MANUAL: Manually configured filter 65 * @EFX_FILTER_PRI_REQUIRED: Required for correct behaviour (user-level 66 * networking and SR-IOV) 67 */ 68 enum efx_filter_priority { 69 EFX_FILTER_PRI_HINT = 0, 70 EFX_FILTER_PRI_AUTO, 71 EFX_FILTER_PRI_MANUAL, 72 EFX_FILTER_PRI_REQUIRED, 73 }; 74 75 /** 76 * enum efx_filter_flags - flags for hardware filter specifications 77 * @EFX_FILTER_FLAG_RX_RSS: Use RSS to spread across multiple queues. 78 * By default, matching packets will be delivered only to the 79 * specified queue. If this flag is set, they will be delivered 80 * to a range of queues offset from the specified queue number 81 * according to the indirection table. 82 * @EFX_FILTER_FLAG_RX_SCATTER: Enable DMA scatter on the receiving 83 * queue. 84 * @EFX_FILTER_FLAG_RX_OVER_AUTO: Indicates a filter that is 85 * overriding an automatic filter (priority 86 * %EFX_FILTER_PRI_AUTO). This may only be set by the filter 87 * implementation for each type. A removal request will restore 88 * the automatic filter in its place. 89 * @EFX_FILTER_FLAG_RX: Filter is for RX 90 * @EFX_FILTER_FLAG_TX: Filter is for TX 91 */ 92 enum efx_filter_flags { 93 EFX_FILTER_FLAG_RX_RSS = 0x01, 94 EFX_FILTER_FLAG_RX_SCATTER = 0x02, 95 EFX_FILTER_FLAG_RX_OVER_AUTO = 0x04, 96 EFX_FILTER_FLAG_RX = 0x08, 97 EFX_FILTER_FLAG_TX = 0x10, 98 }; 99 100 /** enum efx_encap_type - types of encapsulation 101 * @EFX_ENCAP_TYPE_NONE: no encapsulation 102 * @EFX_ENCAP_TYPE_VXLAN: VXLAN encapsulation 103 * @EFX_ENCAP_TYPE_NVGRE: NVGRE encapsulation 104 * @EFX_ENCAP_TYPE_GENEVE: GENEVE encapsulation 105 * @EFX_ENCAP_FLAG_IPV6: indicates IPv6 outer frame 106 * 107 * Contains both enumerated types and flags. 108 * To get just the type, OR with @EFX_ENCAP_TYPES_MASK. 109 */ 110 enum efx_encap_type { 111 EFX_ENCAP_TYPE_NONE = 0, 112 EFX_ENCAP_TYPE_VXLAN = 1, 113 EFX_ENCAP_TYPE_NVGRE = 2, 114 EFX_ENCAP_TYPE_GENEVE = 3, 115 116 EFX_ENCAP_TYPES_MASK = 7, 117 EFX_ENCAP_FLAG_IPV6 = 8, 118 }; 119 120 /** 121 * struct efx_filter_spec - specification for a hardware filter 122 * @match_flags: Match type flags, from &enum efx_filter_match_flags 123 * @priority: Priority of the filter, from &enum efx_filter_priority 124 * @flags: Miscellaneous flags, from &enum efx_filter_flags 125 * @rss_context: RSS context to use, if %EFX_FILTER_FLAG_RX_RSS is set. This 126 * is a user_id (with 0 meaning the driver/default RSS context), not an 127 * MCFW context_id. 128 * @dmaq_id: Source/target queue index, or %EFX_FILTER_RX_DMAQ_ID_DROP for 129 * an RX drop filter 130 * @outer_vid: Outer VLAN ID to match, if %EFX_FILTER_MATCH_OUTER_VID is set 131 * @inner_vid: Inner VLAN ID to match, if %EFX_FILTER_MATCH_INNER_VID is set 132 * @loc_mac: Local MAC address to match, if %EFX_FILTER_MATCH_LOC_MAC or 133 * %EFX_FILTER_MATCH_LOC_MAC_IG is set 134 * @rem_mac: Remote MAC address to match, if %EFX_FILTER_MATCH_REM_MAC is set 135 * @ether_type: Ether-type to match, if %EFX_FILTER_MATCH_ETHER_TYPE is set 136 * @ip_proto: IP transport protocol to match, if %EFX_FILTER_MATCH_IP_PROTO 137 * is set 138 * @loc_host: Local IP host to match, if %EFX_FILTER_MATCH_LOC_HOST is set 139 * @rem_host: Remote IP host to match, if %EFX_FILTER_MATCH_REM_HOST is set 140 * @loc_port: Local TCP/UDP port to match, if %EFX_FILTER_MATCH_LOC_PORT is set 141 * @rem_port: Remote TCP/UDP port to match, if %EFX_FILTER_MATCH_REM_PORT is set 142 * @encap_type: Encapsulation type to match (from &enum efx_encap_type), if 143 * %EFX_FILTER_MATCH_ENCAP_TYPE is set 144 * 145 * The efx_filter_init_rx() or efx_filter_init_tx() function *must* be 146 * used to initialise the structure. The efx_filter_set_*() functions 147 * may then be used to set @rss_context, @match_flags and related 148 * fields. 149 * 150 * The @priority field is used by software to determine whether a new 151 * filter may replace an old one. The hardware priority of a filter 152 * depends on which fields are matched. 153 */ 154 struct efx_filter_spec { 155 u32 match_flags:12; 156 u32 priority:2; 157 u32 flags:6; 158 u32 dmaq_id:12; 159 u32 rss_context; 160 __be16 outer_vid __aligned(4); /* allow jhash2() of match values */ 161 __be16 inner_vid; 162 u8 loc_mac[ETH_ALEN]; 163 u8 rem_mac[ETH_ALEN]; 164 __be16 ether_type; 165 u8 ip_proto; 166 __be32 loc_host[4]; 167 __be32 rem_host[4]; 168 __be16 loc_port; 169 __be16 rem_port; 170 u32 encap_type:4; 171 /* total 65 bytes */ 172 }; 173 174 enum { 175 EFX_FILTER_RX_DMAQ_ID_DROP = 0xfff 176 }; 177 178 static inline void efx_filter_init_rx(struct efx_filter_spec *spec, 179 enum efx_filter_priority priority, 180 enum efx_filter_flags flags, 181 unsigned rxq_id) 182 { 183 memset(spec, 0, sizeof(*spec)); 184 spec->priority = priority; 185 spec->flags = EFX_FILTER_FLAG_RX | flags; 186 spec->rss_context = 0; 187 spec->dmaq_id = rxq_id; 188 } 189 190 static inline void efx_filter_init_tx(struct efx_filter_spec *spec, 191 unsigned txq_id) 192 { 193 memset(spec, 0, sizeof(*spec)); 194 spec->priority = EFX_FILTER_PRI_REQUIRED; 195 spec->flags = EFX_FILTER_FLAG_TX; 196 spec->dmaq_id = txq_id; 197 } 198 199 /** 200 * efx_filter_set_ipv4_local - specify IPv4 host, transport protocol and port 201 * @spec: Specification to initialise 202 * @proto: Transport layer protocol number 203 * @host: Local host address (network byte order) 204 * @port: Local port (network byte order) 205 */ 206 static inline int 207 efx_filter_set_ipv4_local(struct efx_filter_spec *spec, u8 proto, 208 __be32 host, __be16 port) 209 { 210 spec->match_flags |= 211 EFX_FILTER_MATCH_ETHER_TYPE | EFX_FILTER_MATCH_IP_PROTO | 212 EFX_FILTER_MATCH_LOC_HOST | EFX_FILTER_MATCH_LOC_PORT; 213 spec->ether_type = htons(ETH_P_IP); 214 spec->ip_proto = proto; 215 spec->loc_host[0] = host; 216 spec->loc_port = port; 217 return 0; 218 } 219 220 /** 221 * efx_filter_set_ipv4_full - specify IPv4 hosts, transport protocol and ports 222 * @spec: Specification to initialise 223 * @proto: Transport layer protocol number 224 * @lhost: Local host address (network byte order) 225 * @lport: Local port (network byte order) 226 * @rhost: Remote host address (network byte order) 227 * @rport: Remote port (network byte order) 228 */ 229 static inline int 230 efx_filter_set_ipv4_full(struct efx_filter_spec *spec, u8 proto, 231 __be32 lhost, __be16 lport, 232 __be32 rhost, __be16 rport) 233 { 234 spec->match_flags |= 235 EFX_FILTER_MATCH_ETHER_TYPE | EFX_FILTER_MATCH_IP_PROTO | 236 EFX_FILTER_MATCH_LOC_HOST | EFX_FILTER_MATCH_LOC_PORT | 237 EFX_FILTER_MATCH_REM_HOST | EFX_FILTER_MATCH_REM_PORT; 238 spec->ether_type = htons(ETH_P_IP); 239 spec->ip_proto = proto; 240 spec->loc_host[0] = lhost; 241 spec->loc_port = lport; 242 spec->rem_host[0] = rhost; 243 spec->rem_port = rport; 244 return 0; 245 } 246 247 enum { 248 EFX_FILTER_VID_UNSPEC = 0xffff, 249 }; 250 251 /** 252 * efx_filter_set_eth_local - specify local Ethernet address and/or VID 253 * @spec: Specification to initialise 254 * @vid: Outer VLAN ID to match, or %EFX_FILTER_VID_UNSPEC 255 * @addr: Local Ethernet MAC address, or %NULL 256 */ 257 static inline int efx_filter_set_eth_local(struct efx_filter_spec *spec, 258 u16 vid, const u8 *addr) 259 { 260 if (vid == EFX_FILTER_VID_UNSPEC && addr == NULL) 261 return -EINVAL; 262 263 if (vid != EFX_FILTER_VID_UNSPEC) { 264 spec->match_flags |= EFX_FILTER_MATCH_OUTER_VID; 265 spec->outer_vid = htons(vid); 266 } 267 if (addr != NULL) { 268 spec->match_flags |= EFX_FILTER_MATCH_LOC_MAC; 269 ether_addr_copy(spec->loc_mac, addr); 270 } 271 return 0; 272 } 273 274 /** 275 * efx_filter_set_uc_def - specify matching otherwise-unmatched unicast 276 * @spec: Specification to initialise 277 */ 278 static inline int efx_filter_set_uc_def(struct efx_filter_spec *spec) 279 { 280 spec->match_flags |= EFX_FILTER_MATCH_LOC_MAC_IG; 281 return 0; 282 } 283 284 /** 285 * efx_filter_set_mc_def - specify matching otherwise-unmatched multicast 286 * @spec: Specification to initialise 287 */ 288 static inline int efx_filter_set_mc_def(struct efx_filter_spec *spec) 289 { 290 spec->match_flags |= EFX_FILTER_MATCH_LOC_MAC_IG; 291 spec->loc_mac[0] = 1; 292 return 0; 293 } 294 295 static inline void efx_filter_set_encap_type(struct efx_filter_spec *spec, 296 enum efx_encap_type encap_type) 297 { 298 spec->match_flags |= EFX_FILTER_MATCH_ENCAP_TYPE; 299 spec->encap_type = encap_type; 300 } 301 302 static inline enum efx_encap_type efx_filter_get_encap_type( 303 const struct efx_filter_spec *spec) 304 { 305 if (spec->match_flags & EFX_FILTER_MATCH_ENCAP_TYPE) 306 return spec->encap_type; 307 return EFX_ENCAP_TYPE_NONE; 308 } 309 #endif /* EFX_FILTER_H */ 310