1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright (c) 2019, Intel Corporation. */ 3 4 #include "ice_common.h" 5 #include "ice_flow.h" 6 7 /* Describe properties of a protocol header field */ 8 struct ice_flow_field_info { 9 enum ice_flow_seg_hdr hdr; 10 s16 off; /* Offset from start of a protocol header, in bits */ 11 u16 size; /* Size of fields in bits */ 12 }; 13 14 #define ICE_FLOW_FLD_INFO(_hdr, _offset_bytes, _size_bytes) { \ 15 .hdr = _hdr, \ 16 .off = (_offset_bytes) * BITS_PER_BYTE, \ 17 .size = (_size_bytes) * BITS_PER_BYTE, \ 18 } 19 20 /* Table containing properties of supported protocol header fields */ 21 static const 22 struct ice_flow_field_info ice_flds_info[ICE_FLOW_FIELD_IDX_MAX] = { 23 /* IPv4 / IPv6 */ 24 /* ICE_FLOW_FIELD_IDX_IPV4_SA */ 25 ICE_FLOW_FLD_INFO(ICE_FLOW_SEG_HDR_IPV4, 12, sizeof(struct in_addr)), 26 /* ICE_FLOW_FIELD_IDX_IPV4_DA */ 27 ICE_FLOW_FLD_INFO(ICE_FLOW_SEG_HDR_IPV4, 16, sizeof(struct in_addr)), 28 /* ICE_FLOW_FIELD_IDX_IPV6_SA */ 29 ICE_FLOW_FLD_INFO(ICE_FLOW_SEG_HDR_IPV6, 8, sizeof(struct in6_addr)), 30 /* ICE_FLOW_FIELD_IDX_IPV6_DA */ 31 ICE_FLOW_FLD_INFO(ICE_FLOW_SEG_HDR_IPV6, 24, sizeof(struct in6_addr)), 32 /* Transport */ 33 /* ICE_FLOW_FIELD_IDX_TCP_SRC_PORT */ 34 ICE_FLOW_FLD_INFO(ICE_FLOW_SEG_HDR_TCP, 0, sizeof(__be16)), 35 /* ICE_FLOW_FIELD_IDX_TCP_DST_PORT */ 36 ICE_FLOW_FLD_INFO(ICE_FLOW_SEG_HDR_TCP, 2, sizeof(__be16)), 37 /* ICE_FLOW_FIELD_IDX_UDP_SRC_PORT */ 38 ICE_FLOW_FLD_INFO(ICE_FLOW_SEG_HDR_UDP, 0, sizeof(__be16)), 39 /* ICE_FLOW_FIELD_IDX_UDP_DST_PORT */ 40 ICE_FLOW_FLD_INFO(ICE_FLOW_SEG_HDR_UDP, 2, sizeof(__be16)), 41 /* ICE_FLOW_FIELD_IDX_SCTP_SRC_PORT */ 42 ICE_FLOW_FLD_INFO(ICE_FLOW_SEG_HDR_SCTP, 0, sizeof(__be16)), 43 /* ICE_FLOW_FIELD_IDX_SCTP_DST_PORT */ 44 ICE_FLOW_FLD_INFO(ICE_FLOW_SEG_HDR_SCTP, 2, sizeof(__be16)), 45 /* GRE */ 46 /* ICE_FLOW_FIELD_IDX_GRE_KEYID */ 47 ICE_FLOW_FLD_INFO(ICE_FLOW_SEG_HDR_GRE, 12, 48 sizeof_field(struct gre_full_hdr, key)), 49 }; 50 51 /* Bitmaps indicating relevant packet types for a particular protocol header 52 * 53 * Packet types for packets with an Outer/First/Single IPv4 header 54 */ 55 static const u32 ice_ptypes_ipv4_ofos[] = { 56 0x1DC00000, 0x04000800, 0x00000000, 0x00000000, 57 0x00000000, 0x00000000, 0x00000000, 0x00000000, 58 0x00000000, 0x00000000, 0x00000000, 0x00000000, 59 0x00000000, 0x00000000, 0x00000000, 0x00000000, 60 0x00000000, 0x00000000, 0x00000000, 0x00000000, 61 0x00000000, 0x00000000, 0x00000000, 0x00000000, 62 0x00000000, 0x00000000, 0x00000000, 0x00000000, 63 0x00000000, 0x00000000, 0x00000000, 0x00000000, 64 }; 65 66 /* Packet types for packets with an Innermost/Last IPv4 header */ 67 static const u32 ice_ptypes_ipv4_il[] = { 68 0xE0000000, 0xB807700E, 0x80000003, 0xE01DC03B, 69 0x0000000E, 0x00000000, 0x00000000, 0x00000000, 70 0x00000000, 0x00000000, 0x00000000, 0x00000000, 71 0x00000000, 0x00000000, 0x00000000, 0x00000000, 72 0x00000000, 0x00000000, 0x00000000, 0x00000000, 73 0x00000000, 0x00000000, 0x00000000, 0x00000000, 74 0x00000000, 0x00000000, 0x00000000, 0x00000000, 75 0x00000000, 0x00000000, 0x00000000, 0x00000000, 76 }; 77 78 /* Packet types for packets with an Outer/First/Single IPv6 header */ 79 static const u32 ice_ptypes_ipv6_ofos[] = { 80 0x00000000, 0x00000000, 0x77000000, 0x10002000, 81 0x00000000, 0x00000000, 0x00000000, 0x00000000, 82 0x00000000, 0x00000000, 0x00000000, 0x00000000, 83 0x00000000, 0x00000000, 0x00000000, 0x00000000, 84 0x00000000, 0x00000000, 0x00000000, 0x00000000, 85 0x00000000, 0x00000000, 0x00000000, 0x00000000, 86 0x00000000, 0x00000000, 0x00000000, 0x00000000, 87 0x00000000, 0x00000000, 0x00000000, 0x00000000, 88 }; 89 90 /* Packet types for packets with an Innermost/Last IPv6 header */ 91 static const u32 ice_ptypes_ipv6_il[] = { 92 0x00000000, 0x03B80770, 0x000001DC, 0x0EE00000, 93 0x00000770, 0x00000000, 0x00000000, 0x00000000, 94 0x00000000, 0x00000000, 0x00000000, 0x00000000, 95 0x00000000, 0x00000000, 0x00000000, 0x00000000, 96 0x00000000, 0x00000000, 0x00000000, 0x00000000, 97 0x00000000, 0x00000000, 0x00000000, 0x00000000, 98 0x00000000, 0x00000000, 0x00000000, 0x00000000, 99 0x00000000, 0x00000000, 0x00000000, 0x00000000, 100 }; 101 102 /* UDP Packet types for non-tunneled packets or tunneled 103 * packets with inner UDP. 104 */ 105 static const u32 ice_ptypes_udp_il[] = { 106 0x81000000, 0x20204040, 0x04000010, 0x80810102, 107 0x00000040, 0x00000000, 0x00000000, 0x00000000, 108 0x00000000, 0x00000000, 0x00000000, 0x00000000, 109 0x00000000, 0x00000000, 0x00000000, 0x00000000, 110 0x00000000, 0x00000000, 0x00000000, 0x00000000, 111 0x00000000, 0x00000000, 0x00000000, 0x00000000, 112 0x00000000, 0x00000000, 0x00000000, 0x00000000, 113 0x00000000, 0x00000000, 0x00000000, 0x00000000, 114 }; 115 116 /* Packet types for packets with an Innermost/Last TCP header */ 117 static const u32 ice_ptypes_tcp_il[] = { 118 0x04000000, 0x80810102, 0x10000040, 0x02040408, 119 0x00000102, 0x00000000, 0x00000000, 0x00000000, 120 0x00000000, 0x00000000, 0x00000000, 0x00000000, 121 0x00000000, 0x00000000, 0x00000000, 0x00000000, 122 0x00000000, 0x00000000, 0x00000000, 0x00000000, 123 0x00000000, 0x00000000, 0x00000000, 0x00000000, 124 0x00000000, 0x00000000, 0x00000000, 0x00000000, 125 0x00000000, 0x00000000, 0x00000000, 0x00000000, 126 }; 127 128 /* Packet types for packets with an Innermost/Last SCTP header */ 129 static const u32 ice_ptypes_sctp_il[] = { 130 0x08000000, 0x01020204, 0x20000081, 0x04080810, 131 0x00000204, 0x00000000, 0x00000000, 0x00000000, 132 0x00000000, 0x00000000, 0x00000000, 0x00000000, 133 0x00000000, 0x00000000, 0x00000000, 0x00000000, 134 0x00000000, 0x00000000, 0x00000000, 0x00000000, 135 0x00000000, 0x00000000, 0x00000000, 0x00000000, 136 0x00000000, 0x00000000, 0x00000000, 0x00000000, 137 0x00000000, 0x00000000, 0x00000000, 0x00000000, 138 }; 139 140 /* Packet types for packets with an Outermost/First GRE header */ 141 static const u32 ice_ptypes_gre_of[] = { 142 0x00000000, 0xBFBF7800, 0x000001DF, 0xFEFDE000, 143 0x0000017E, 0x00000000, 0x00000000, 0x00000000, 144 0x00000000, 0x00000000, 0x00000000, 0x00000000, 145 0x00000000, 0x00000000, 0x00000000, 0x00000000, 146 0x00000000, 0x00000000, 0x00000000, 0x00000000, 147 0x00000000, 0x00000000, 0x00000000, 0x00000000, 148 0x00000000, 0x00000000, 0x00000000, 0x00000000, 149 0x00000000, 0x00000000, 0x00000000, 0x00000000, 150 }; 151 152 /* Manage parameters and info. used during the creation of a flow profile */ 153 struct ice_flow_prof_params { 154 enum ice_block blk; 155 u16 entry_length; /* # of bytes formatted entry will require */ 156 u8 es_cnt; 157 struct ice_flow_prof *prof; 158 159 /* For ACL, the es[0] will have the data of ICE_RX_MDID_PKT_FLAGS_15_0 160 * This will give us the direction flags. 161 */ 162 struct ice_fv_word es[ICE_MAX_FV_WORDS]; 163 DECLARE_BITMAP(ptypes, ICE_FLOW_PTYPE_MAX); 164 }; 165 166 #define ICE_FLOW_SEG_HDRS_L3_MASK \ 167 (ICE_FLOW_SEG_HDR_IPV4 | ICE_FLOW_SEG_HDR_IPV6) 168 #define ICE_FLOW_SEG_HDRS_L4_MASK \ 169 (ICE_FLOW_SEG_HDR_TCP | ICE_FLOW_SEG_HDR_UDP | ICE_FLOW_SEG_HDR_SCTP) 170 171 /** 172 * ice_flow_val_hdrs - validates packet segments for valid protocol headers 173 * @segs: array of one or more packet segments that describe the flow 174 * @segs_cnt: number of packet segments provided 175 */ 176 static enum ice_status 177 ice_flow_val_hdrs(struct ice_flow_seg_info *segs, u8 segs_cnt) 178 { 179 u8 i; 180 181 for (i = 0; i < segs_cnt; i++) { 182 /* Multiple L3 headers */ 183 if (segs[i].hdrs & ICE_FLOW_SEG_HDRS_L3_MASK && 184 !is_power_of_2(segs[i].hdrs & ICE_FLOW_SEG_HDRS_L3_MASK)) 185 return ICE_ERR_PARAM; 186 187 /* Multiple L4 headers */ 188 if (segs[i].hdrs & ICE_FLOW_SEG_HDRS_L4_MASK && 189 !is_power_of_2(segs[i].hdrs & ICE_FLOW_SEG_HDRS_L4_MASK)) 190 return ICE_ERR_PARAM; 191 } 192 193 return 0; 194 } 195 196 /* Sizes of fixed known protocol headers without header options */ 197 #define ICE_FLOW_PROT_HDR_SZ_MAC 14 198 #define ICE_FLOW_PROT_HDR_SZ_IPV4 20 199 #define ICE_FLOW_PROT_HDR_SZ_IPV6 40 200 #define ICE_FLOW_PROT_HDR_SZ_TCP 20 201 #define ICE_FLOW_PROT_HDR_SZ_UDP 8 202 #define ICE_FLOW_PROT_HDR_SZ_SCTP 12 203 204 /** 205 * ice_flow_calc_seg_sz - calculates size of a packet segment based on headers 206 * @params: information about the flow to be processed 207 * @seg: index of packet segment whose header size is to be determined 208 */ 209 static u16 ice_flow_calc_seg_sz(struct ice_flow_prof_params *params, u8 seg) 210 { 211 u16 sz = ICE_FLOW_PROT_HDR_SZ_MAC; 212 213 /* L3 headers */ 214 if (params->prof->segs[seg].hdrs & ICE_FLOW_SEG_HDR_IPV4) 215 sz += ICE_FLOW_PROT_HDR_SZ_IPV4; 216 else if (params->prof->segs[seg].hdrs & ICE_FLOW_SEG_HDR_IPV6) 217 sz += ICE_FLOW_PROT_HDR_SZ_IPV6; 218 219 /* L4 headers */ 220 if (params->prof->segs[seg].hdrs & ICE_FLOW_SEG_HDR_TCP) 221 sz += ICE_FLOW_PROT_HDR_SZ_TCP; 222 else if (params->prof->segs[seg].hdrs & ICE_FLOW_SEG_HDR_UDP) 223 sz += ICE_FLOW_PROT_HDR_SZ_UDP; 224 else if (params->prof->segs[seg].hdrs & ICE_FLOW_SEG_HDR_SCTP) 225 sz += ICE_FLOW_PROT_HDR_SZ_SCTP; 226 227 return sz; 228 } 229 230 /** 231 * ice_flow_proc_seg_hdrs - process protocol headers present in pkt segments 232 * @params: information about the flow to be processed 233 * 234 * This function identifies the packet types associated with the protocol 235 * headers being present in packet segments of the specified flow profile. 236 */ 237 static enum ice_status 238 ice_flow_proc_seg_hdrs(struct ice_flow_prof_params *params) 239 { 240 struct ice_flow_prof *prof; 241 u8 i; 242 243 memset(params->ptypes, 0xff, sizeof(params->ptypes)); 244 245 prof = params->prof; 246 247 for (i = 0; i < params->prof->segs_cnt; i++) { 248 const unsigned long *src; 249 u32 hdrs; 250 251 hdrs = prof->segs[i].hdrs; 252 253 if (hdrs & ICE_FLOW_SEG_HDR_IPV4) { 254 src = !i ? (const unsigned long *)ice_ptypes_ipv4_ofos : 255 (const unsigned long *)ice_ptypes_ipv4_il; 256 bitmap_and(params->ptypes, params->ptypes, src, 257 ICE_FLOW_PTYPE_MAX); 258 } else if (hdrs & ICE_FLOW_SEG_HDR_IPV6) { 259 src = !i ? (const unsigned long *)ice_ptypes_ipv6_ofos : 260 (const unsigned long *)ice_ptypes_ipv6_il; 261 bitmap_and(params->ptypes, params->ptypes, src, 262 ICE_FLOW_PTYPE_MAX); 263 } 264 265 if (hdrs & ICE_FLOW_SEG_HDR_UDP) { 266 src = (const unsigned long *)ice_ptypes_udp_il; 267 bitmap_and(params->ptypes, params->ptypes, src, 268 ICE_FLOW_PTYPE_MAX); 269 } else if (hdrs & ICE_FLOW_SEG_HDR_TCP) { 270 bitmap_and(params->ptypes, params->ptypes, 271 (const unsigned long *)ice_ptypes_tcp_il, 272 ICE_FLOW_PTYPE_MAX); 273 } else if (hdrs & ICE_FLOW_SEG_HDR_SCTP) { 274 src = (const unsigned long *)ice_ptypes_sctp_il; 275 bitmap_and(params->ptypes, params->ptypes, src, 276 ICE_FLOW_PTYPE_MAX); 277 } else if (hdrs & ICE_FLOW_SEG_HDR_GRE) { 278 if (!i) { 279 src = (const unsigned long *)ice_ptypes_gre_of; 280 bitmap_and(params->ptypes, params->ptypes, 281 src, ICE_FLOW_PTYPE_MAX); 282 } 283 } 284 } 285 286 return 0; 287 } 288 289 /** 290 * ice_flow_xtract_fld - Create an extraction sequence entry for the given field 291 * @hw: pointer to the HW struct 292 * @params: information about the flow to be processed 293 * @seg: packet segment index of the field to be extracted 294 * @fld: ID of field to be extracted 295 * 296 * This function determines the protocol ID, offset, and size of the given 297 * field. It then allocates one or more extraction sequence entries for the 298 * given field, and fill the entries with protocol ID and offset information. 299 */ 300 static enum ice_status 301 ice_flow_xtract_fld(struct ice_hw *hw, struct ice_flow_prof_params *params, 302 u8 seg, enum ice_flow_field fld) 303 { 304 enum ice_prot_id prot_id = ICE_PROT_ID_INVAL; 305 u8 fv_words = hw->blk[params->blk].es.fvw; 306 struct ice_flow_fld_info *flds; 307 u16 cnt, ese_bits, i; 308 u16 off; 309 310 flds = params->prof->segs[seg].fields; 311 312 switch (fld) { 313 case ICE_FLOW_FIELD_IDX_IPV4_SA: 314 case ICE_FLOW_FIELD_IDX_IPV4_DA: 315 prot_id = seg == 0 ? ICE_PROT_IPV4_OF_OR_S : ICE_PROT_IPV4_IL; 316 break; 317 case ICE_FLOW_FIELD_IDX_IPV6_SA: 318 case ICE_FLOW_FIELD_IDX_IPV6_DA: 319 prot_id = seg == 0 ? ICE_PROT_IPV6_OF_OR_S : ICE_PROT_IPV6_IL; 320 break; 321 case ICE_FLOW_FIELD_IDX_TCP_SRC_PORT: 322 case ICE_FLOW_FIELD_IDX_TCP_DST_PORT: 323 prot_id = ICE_PROT_TCP_IL; 324 break; 325 case ICE_FLOW_FIELD_IDX_UDP_SRC_PORT: 326 case ICE_FLOW_FIELD_IDX_UDP_DST_PORT: 327 prot_id = ICE_PROT_UDP_IL_OR_S; 328 break; 329 case ICE_FLOW_FIELD_IDX_SCTP_SRC_PORT: 330 case ICE_FLOW_FIELD_IDX_SCTP_DST_PORT: 331 prot_id = ICE_PROT_SCTP_IL; 332 break; 333 case ICE_FLOW_FIELD_IDX_GRE_KEYID: 334 prot_id = ICE_PROT_GRE_OF; 335 break; 336 default: 337 return ICE_ERR_NOT_IMPL; 338 } 339 340 /* Each extraction sequence entry is a word in size, and extracts a 341 * word-aligned offset from a protocol header. 342 */ 343 ese_bits = ICE_FLOW_FV_EXTRACT_SZ * BITS_PER_BYTE; 344 345 flds[fld].xtrct.prot_id = prot_id; 346 flds[fld].xtrct.off = (ice_flds_info[fld].off / ese_bits) * 347 ICE_FLOW_FV_EXTRACT_SZ; 348 flds[fld].xtrct.disp = (u8)(ice_flds_info[fld].off % ese_bits); 349 flds[fld].xtrct.idx = params->es_cnt; 350 351 /* Adjust the next field-entry index after accommodating the number of 352 * entries this field consumes 353 */ 354 cnt = DIV_ROUND_UP(flds[fld].xtrct.disp + ice_flds_info[fld].size, 355 ese_bits); 356 357 /* Fill in the extraction sequence entries needed for this field */ 358 off = flds[fld].xtrct.off; 359 for (i = 0; i < cnt; i++) { 360 u8 idx; 361 362 /* Make sure the number of extraction sequence required 363 * does not exceed the block's capability 364 */ 365 if (params->es_cnt >= fv_words) 366 return ICE_ERR_MAX_LIMIT; 367 368 /* some blocks require a reversed field vector layout */ 369 if (hw->blk[params->blk].es.reverse) 370 idx = fv_words - params->es_cnt - 1; 371 else 372 idx = params->es_cnt; 373 374 params->es[idx].prot_id = prot_id; 375 params->es[idx].off = off; 376 params->es_cnt++; 377 378 off += ICE_FLOW_FV_EXTRACT_SZ; 379 } 380 381 return 0; 382 } 383 384 /** 385 * ice_flow_xtract_raws - Create extract sequence entries for raw bytes 386 * @hw: pointer to the HW struct 387 * @params: information about the flow to be processed 388 * @seg: index of packet segment whose raw fields are to be be extracted 389 */ 390 static enum ice_status 391 ice_flow_xtract_raws(struct ice_hw *hw, struct ice_flow_prof_params *params, 392 u8 seg) 393 { 394 u16 fv_words; 395 u16 hdrs_sz; 396 u8 i; 397 398 if (!params->prof->segs[seg].raws_cnt) 399 return 0; 400 401 if (params->prof->segs[seg].raws_cnt > 402 ARRAY_SIZE(params->prof->segs[seg].raws)) 403 return ICE_ERR_MAX_LIMIT; 404 405 /* Offsets within the segment headers are not supported */ 406 hdrs_sz = ice_flow_calc_seg_sz(params, seg); 407 if (!hdrs_sz) 408 return ICE_ERR_PARAM; 409 410 fv_words = hw->blk[params->blk].es.fvw; 411 412 for (i = 0; i < params->prof->segs[seg].raws_cnt; i++) { 413 struct ice_flow_seg_fld_raw *raw; 414 u16 off, cnt, j; 415 416 raw = ¶ms->prof->segs[seg].raws[i]; 417 418 /* Storing extraction information */ 419 raw->info.xtrct.prot_id = ICE_PROT_MAC_OF_OR_S; 420 raw->info.xtrct.off = (raw->off / ICE_FLOW_FV_EXTRACT_SZ) * 421 ICE_FLOW_FV_EXTRACT_SZ; 422 raw->info.xtrct.disp = (raw->off % ICE_FLOW_FV_EXTRACT_SZ) * 423 BITS_PER_BYTE; 424 raw->info.xtrct.idx = params->es_cnt; 425 426 /* Determine the number of field vector entries this raw field 427 * consumes. 428 */ 429 cnt = DIV_ROUND_UP(raw->info.xtrct.disp + 430 (raw->info.src.last * BITS_PER_BYTE), 431 (ICE_FLOW_FV_EXTRACT_SZ * BITS_PER_BYTE)); 432 off = raw->info.xtrct.off; 433 for (j = 0; j < cnt; j++) { 434 u16 idx; 435 436 /* Make sure the number of extraction sequence required 437 * does not exceed the block's capability 438 */ 439 if (params->es_cnt >= hw->blk[params->blk].es.count || 440 params->es_cnt >= ICE_MAX_FV_WORDS) 441 return ICE_ERR_MAX_LIMIT; 442 443 /* some blocks require a reversed field vector layout */ 444 if (hw->blk[params->blk].es.reverse) 445 idx = fv_words - params->es_cnt - 1; 446 else 447 idx = params->es_cnt; 448 449 params->es[idx].prot_id = raw->info.xtrct.prot_id; 450 params->es[idx].off = off; 451 params->es_cnt++; 452 off += ICE_FLOW_FV_EXTRACT_SZ; 453 } 454 } 455 456 return 0; 457 } 458 459 /** 460 * ice_flow_create_xtrct_seq - Create an extraction sequence for given segments 461 * @hw: pointer to the HW struct 462 * @params: information about the flow to be processed 463 * 464 * This function iterates through all matched fields in the given segments, and 465 * creates an extraction sequence for the fields. 466 */ 467 static enum ice_status 468 ice_flow_create_xtrct_seq(struct ice_hw *hw, 469 struct ice_flow_prof_params *params) 470 { 471 struct ice_flow_prof *prof = params->prof; 472 enum ice_status status = 0; 473 u8 i; 474 475 for (i = 0; i < prof->segs_cnt; i++) { 476 u8 j; 477 478 for_each_set_bit(j, (unsigned long *)&prof->segs[i].match, 479 ICE_FLOW_FIELD_IDX_MAX) { 480 status = ice_flow_xtract_fld(hw, params, i, 481 (enum ice_flow_field)j); 482 if (status) 483 return status; 484 } 485 486 /* Process raw matching bytes */ 487 status = ice_flow_xtract_raws(hw, params, i); 488 if (status) 489 return status; 490 } 491 492 return status; 493 } 494 495 /** 496 * ice_flow_proc_segs - process all packet segments associated with a profile 497 * @hw: pointer to the HW struct 498 * @params: information about the flow to be processed 499 */ 500 static enum ice_status 501 ice_flow_proc_segs(struct ice_hw *hw, struct ice_flow_prof_params *params) 502 { 503 enum ice_status status; 504 505 status = ice_flow_proc_seg_hdrs(params); 506 if (status) 507 return status; 508 509 status = ice_flow_create_xtrct_seq(hw, params); 510 if (status) 511 return status; 512 513 switch (params->blk) { 514 case ICE_BLK_FD: 515 case ICE_BLK_RSS: 516 status = 0; 517 break; 518 default: 519 return ICE_ERR_NOT_IMPL; 520 } 521 522 return status; 523 } 524 525 #define ICE_FLOW_FIND_PROF_CHK_FLDS 0x00000001 526 #define ICE_FLOW_FIND_PROF_CHK_VSI 0x00000002 527 #define ICE_FLOW_FIND_PROF_NOT_CHK_DIR 0x00000004 528 529 /** 530 * ice_flow_find_prof_conds - Find a profile matching headers and conditions 531 * @hw: pointer to the HW struct 532 * @blk: classification stage 533 * @dir: flow direction 534 * @segs: array of one or more packet segments that describe the flow 535 * @segs_cnt: number of packet segments provided 536 * @vsi_handle: software VSI handle to check VSI (ICE_FLOW_FIND_PROF_CHK_VSI) 537 * @conds: additional conditions to be checked (ICE_FLOW_FIND_PROF_CHK_*) 538 */ 539 static struct ice_flow_prof * 540 ice_flow_find_prof_conds(struct ice_hw *hw, enum ice_block blk, 541 enum ice_flow_dir dir, struct ice_flow_seg_info *segs, 542 u8 segs_cnt, u16 vsi_handle, u32 conds) 543 { 544 struct ice_flow_prof *p, *prof = NULL; 545 546 mutex_lock(&hw->fl_profs_locks[blk]); 547 list_for_each_entry(p, &hw->fl_profs[blk], l_entry) 548 if ((p->dir == dir || conds & ICE_FLOW_FIND_PROF_NOT_CHK_DIR) && 549 segs_cnt && segs_cnt == p->segs_cnt) { 550 u8 i; 551 552 /* Check for profile-VSI association if specified */ 553 if ((conds & ICE_FLOW_FIND_PROF_CHK_VSI) && 554 ice_is_vsi_valid(hw, vsi_handle) && 555 !test_bit(vsi_handle, p->vsis)) 556 continue; 557 558 /* Protocol headers must be checked. Matched fields are 559 * checked if specified. 560 */ 561 for (i = 0; i < segs_cnt; i++) 562 if (segs[i].hdrs != p->segs[i].hdrs || 563 ((conds & ICE_FLOW_FIND_PROF_CHK_FLDS) && 564 segs[i].match != p->segs[i].match)) 565 break; 566 567 /* A match is found if all segments are matched */ 568 if (i == segs_cnt) { 569 prof = p; 570 break; 571 } 572 } 573 mutex_unlock(&hw->fl_profs_locks[blk]); 574 575 return prof; 576 } 577 578 /** 579 * ice_flow_find_prof_id - Look up a profile with given profile ID 580 * @hw: pointer to the HW struct 581 * @blk: classification stage 582 * @prof_id: unique ID to identify this flow profile 583 */ 584 static struct ice_flow_prof * 585 ice_flow_find_prof_id(struct ice_hw *hw, enum ice_block blk, u64 prof_id) 586 { 587 struct ice_flow_prof *p; 588 589 list_for_each_entry(p, &hw->fl_profs[blk], l_entry) 590 if (p->id == prof_id) 591 return p; 592 593 return NULL; 594 } 595 596 /** 597 * ice_dealloc_flow_entry - Deallocate flow entry memory 598 * @hw: pointer to the HW struct 599 * @entry: flow entry to be removed 600 */ 601 static void 602 ice_dealloc_flow_entry(struct ice_hw *hw, struct ice_flow_entry *entry) 603 { 604 if (!entry) 605 return; 606 607 if (entry->entry) 608 devm_kfree(ice_hw_to_dev(hw), entry->entry); 609 610 devm_kfree(ice_hw_to_dev(hw), entry); 611 } 612 613 /** 614 * ice_flow_rem_entry_sync - Remove a flow entry 615 * @hw: pointer to the HW struct 616 * @blk: classification stage 617 * @entry: flow entry to be removed 618 */ 619 static enum ice_status 620 ice_flow_rem_entry_sync(struct ice_hw *hw, enum ice_block __always_unused blk, 621 struct ice_flow_entry *entry) 622 { 623 if (!entry) 624 return ICE_ERR_BAD_PTR; 625 626 list_del(&entry->l_entry); 627 628 ice_dealloc_flow_entry(hw, entry); 629 630 return 0; 631 } 632 633 /** 634 * ice_flow_add_prof_sync - Add a flow profile for packet segments and fields 635 * @hw: pointer to the HW struct 636 * @blk: classification stage 637 * @dir: flow direction 638 * @prof_id: unique ID to identify this flow profile 639 * @segs: array of one or more packet segments that describe the flow 640 * @segs_cnt: number of packet segments provided 641 * @prof: stores the returned flow profile added 642 * 643 * Assumption: the caller has acquired the lock to the profile list 644 */ 645 static enum ice_status 646 ice_flow_add_prof_sync(struct ice_hw *hw, enum ice_block blk, 647 enum ice_flow_dir dir, u64 prof_id, 648 struct ice_flow_seg_info *segs, u8 segs_cnt, 649 struct ice_flow_prof **prof) 650 { 651 struct ice_flow_prof_params params; 652 enum ice_status status; 653 u8 i; 654 655 if (!prof) 656 return ICE_ERR_BAD_PTR; 657 658 memset(¶ms, 0, sizeof(params)); 659 params.prof = devm_kzalloc(ice_hw_to_dev(hw), sizeof(*params.prof), 660 GFP_KERNEL); 661 if (!params.prof) 662 return ICE_ERR_NO_MEMORY; 663 664 /* initialize extraction sequence to all invalid (0xff) */ 665 for (i = 0; i < ICE_MAX_FV_WORDS; i++) { 666 params.es[i].prot_id = ICE_PROT_INVALID; 667 params.es[i].off = ICE_FV_OFFSET_INVAL; 668 } 669 670 params.blk = blk; 671 params.prof->id = prof_id; 672 params.prof->dir = dir; 673 params.prof->segs_cnt = segs_cnt; 674 675 /* Make a copy of the segments that need to be persistent in the flow 676 * profile instance 677 */ 678 for (i = 0; i < segs_cnt; i++) 679 memcpy(¶ms.prof->segs[i], &segs[i], sizeof(*segs)); 680 681 status = ice_flow_proc_segs(hw, ¶ms); 682 if (status) { 683 ice_debug(hw, ICE_DBG_FLOW, 684 "Error processing a flow's packet segments\n"); 685 goto out; 686 } 687 688 /* Add a HW profile for this flow profile */ 689 status = ice_add_prof(hw, blk, prof_id, (u8 *)params.ptypes, params.es); 690 if (status) { 691 ice_debug(hw, ICE_DBG_FLOW, "Error adding a HW flow profile\n"); 692 goto out; 693 } 694 695 INIT_LIST_HEAD(¶ms.prof->entries); 696 mutex_init(¶ms.prof->entries_lock); 697 *prof = params.prof; 698 699 out: 700 if (status) 701 devm_kfree(ice_hw_to_dev(hw), params.prof); 702 703 return status; 704 } 705 706 /** 707 * ice_flow_rem_prof_sync - remove a flow profile 708 * @hw: pointer to the hardware structure 709 * @blk: classification stage 710 * @prof: pointer to flow profile to remove 711 * 712 * Assumption: the caller has acquired the lock to the profile list 713 */ 714 static enum ice_status 715 ice_flow_rem_prof_sync(struct ice_hw *hw, enum ice_block blk, 716 struct ice_flow_prof *prof) 717 { 718 enum ice_status status; 719 720 /* Remove all remaining flow entries before removing the flow profile */ 721 if (!list_empty(&prof->entries)) { 722 struct ice_flow_entry *e, *t; 723 724 mutex_lock(&prof->entries_lock); 725 726 list_for_each_entry_safe(e, t, &prof->entries, l_entry) { 727 status = ice_flow_rem_entry_sync(hw, blk, e); 728 if (status) 729 break; 730 } 731 732 mutex_unlock(&prof->entries_lock); 733 } 734 735 /* Remove all hardware profiles associated with this flow profile */ 736 status = ice_rem_prof(hw, blk, prof->id); 737 if (!status) { 738 list_del(&prof->l_entry); 739 mutex_destroy(&prof->entries_lock); 740 devm_kfree(ice_hw_to_dev(hw), prof); 741 } 742 743 return status; 744 } 745 746 /** 747 * ice_flow_assoc_prof - associate a VSI with a flow profile 748 * @hw: pointer to the hardware structure 749 * @blk: classification stage 750 * @prof: pointer to flow profile 751 * @vsi_handle: software VSI handle 752 * 753 * Assumption: the caller has acquired the lock to the profile list 754 * and the software VSI handle has been validated 755 */ 756 static enum ice_status 757 ice_flow_assoc_prof(struct ice_hw *hw, enum ice_block blk, 758 struct ice_flow_prof *prof, u16 vsi_handle) 759 { 760 enum ice_status status = 0; 761 762 if (!test_bit(vsi_handle, prof->vsis)) { 763 status = ice_add_prof_id_flow(hw, blk, 764 ice_get_hw_vsi_num(hw, 765 vsi_handle), 766 prof->id); 767 if (!status) 768 set_bit(vsi_handle, prof->vsis); 769 else 770 ice_debug(hw, ICE_DBG_FLOW, 771 "HW profile add failed, %d\n", 772 status); 773 } 774 775 return status; 776 } 777 778 /** 779 * ice_flow_disassoc_prof - disassociate a VSI from a flow profile 780 * @hw: pointer to the hardware structure 781 * @blk: classification stage 782 * @prof: pointer to flow profile 783 * @vsi_handle: software VSI handle 784 * 785 * Assumption: the caller has acquired the lock to the profile list 786 * and the software VSI handle has been validated 787 */ 788 static enum ice_status 789 ice_flow_disassoc_prof(struct ice_hw *hw, enum ice_block blk, 790 struct ice_flow_prof *prof, u16 vsi_handle) 791 { 792 enum ice_status status = 0; 793 794 if (test_bit(vsi_handle, prof->vsis)) { 795 status = ice_rem_prof_id_flow(hw, blk, 796 ice_get_hw_vsi_num(hw, 797 vsi_handle), 798 prof->id); 799 if (!status) 800 clear_bit(vsi_handle, prof->vsis); 801 else 802 ice_debug(hw, ICE_DBG_FLOW, 803 "HW profile remove failed, %d\n", 804 status); 805 } 806 807 return status; 808 } 809 810 /** 811 * ice_flow_add_prof - Add a flow profile for packet segments and matched fields 812 * @hw: pointer to the HW struct 813 * @blk: classification stage 814 * @dir: flow direction 815 * @prof_id: unique ID to identify this flow profile 816 * @segs: array of one or more packet segments that describe the flow 817 * @segs_cnt: number of packet segments provided 818 * @prof: stores the returned flow profile added 819 */ 820 enum ice_status 821 ice_flow_add_prof(struct ice_hw *hw, enum ice_block blk, enum ice_flow_dir dir, 822 u64 prof_id, struct ice_flow_seg_info *segs, u8 segs_cnt, 823 struct ice_flow_prof **prof) 824 { 825 enum ice_status status; 826 827 if (segs_cnt > ICE_FLOW_SEG_MAX) 828 return ICE_ERR_MAX_LIMIT; 829 830 if (!segs_cnt) 831 return ICE_ERR_PARAM; 832 833 if (!segs) 834 return ICE_ERR_BAD_PTR; 835 836 status = ice_flow_val_hdrs(segs, segs_cnt); 837 if (status) 838 return status; 839 840 mutex_lock(&hw->fl_profs_locks[blk]); 841 842 status = ice_flow_add_prof_sync(hw, blk, dir, prof_id, segs, segs_cnt, 843 prof); 844 if (!status) 845 list_add(&(*prof)->l_entry, &hw->fl_profs[blk]); 846 847 mutex_unlock(&hw->fl_profs_locks[blk]); 848 849 return status; 850 } 851 852 /** 853 * ice_flow_rem_prof - Remove a flow profile and all entries associated with it 854 * @hw: pointer to the HW struct 855 * @blk: the block for which the flow profile is to be removed 856 * @prof_id: unique ID of the flow profile to be removed 857 */ 858 enum ice_status 859 ice_flow_rem_prof(struct ice_hw *hw, enum ice_block blk, u64 prof_id) 860 { 861 struct ice_flow_prof *prof; 862 enum ice_status status; 863 864 mutex_lock(&hw->fl_profs_locks[blk]); 865 866 prof = ice_flow_find_prof_id(hw, blk, prof_id); 867 if (!prof) { 868 status = ICE_ERR_DOES_NOT_EXIST; 869 goto out; 870 } 871 872 /* prof becomes invalid after the call */ 873 status = ice_flow_rem_prof_sync(hw, blk, prof); 874 875 out: 876 mutex_unlock(&hw->fl_profs_locks[blk]); 877 878 return status; 879 } 880 881 /** 882 * ice_flow_add_entry - Add a flow entry 883 * @hw: pointer to the HW struct 884 * @blk: classification stage 885 * @prof_id: ID of the profile to add a new flow entry to 886 * @entry_id: unique ID to identify this flow entry 887 * @vsi_handle: software VSI handle for the flow entry 888 * @prio: priority of the flow entry 889 * @data: pointer to a data buffer containing flow entry's match values/masks 890 * @entry_h: pointer to buffer that receives the new flow entry's handle 891 */ 892 enum ice_status 893 ice_flow_add_entry(struct ice_hw *hw, enum ice_block blk, u64 prof_id, 894 u64 entry_id, u16 vsi_handle, enum ice_flow_priority prio, 895 void *data, u64 *entry_h) 896 { 897 struct ice_flow_entry *e = NULL; 898 struct ice_flow_prof *prof; 899 enum ice_status status; 900 901 /* No flow entry data is expected for RSS */ 902 if (!entry_h || (!data && blk != ICE_BLK_RSS)) 903 return ICE_ERR_BAD_PTR; 904 905 if (!ice_is_vsi_valid(hw, vsi_handle)) 906 return ICE_ERR_PARAM; 907 908 mutex_lock(&hw->fl_profs_locks[blk]); 909 910 prof = ice_flow_find_prof_id(hw, blk, prof_id); 911 if (!prof) { 912 status = ICE_ERR_DOES_NOT_EXIST; 913 } else { 914 /* Allocate memory for the entry being added and associate 915 * the VSI to the found flow profile 916 */ 917 e = devm_kzalloc(ice_hw_to_dev(hw), sizeof(*e), GFP_KERNEL); 918 if (!e) 919 status = ICE_ERR_NO_MEMORY; 920 else 921 status = ice_flow_assoc_prof(hw, blk, prof, vsi_handle); 922 } 923 924 mutex_unlock(&hw->fl_profs_locks[blk]); 925 if (status) 926 goto out; 927 928 e->id = entry_id; 929 e->vsi_handle = vsi_handle; 930 e->prof = prof; 931 e->priority = prio; 932 933 switch (blk) { 934 case ICE_BLK_FD: 935 case ICE_BLK_RSS: 936 break; 937 default: 938 status = ICE_ERR_NOT_IMPL; 939 goto out; 940 } 941 942 mutex_lock(&prof->entries_lock); 943 list_add(&e->l_entry, &prof->entries); 944 mutex_unlock(&prof->entries_lock); 945 946 *entry_h = ICE_FLOW_ENTRY_HNDL(e); 947 948 out: 949 if (status && e) { 950 if (e->entry) 951 devm_kfree(ice_hw_to_dev(hw), e->entry); 952 devm_kfree(ice_hw_to_dev(hw), e); 953 } 954 955 return status; 956 } 957 958 /** 959 * ice_flow_rem_entry - Remove a flow entry 960 * @hw: pointer to the HW struct 961 * @blk: classification stage 962 * @entry_h: handle to the flow entry to be removed 963 */ 964 enum ice_status ice_flow_rem_entry(struct ice_hw *hw, enum ice_block blk, 965 u64 entry_h) 966 { 967 struct ice_flow_entry *entry; 968 struct ice_flow_prof *prof; 969 enum ice_status status = 0; 970 971 if (entry_h == ICE_FLOW_ENTRY_HANDLE_INVAL) 972 return ICE_ERR_PARAM; 973 974 entry = ICE_FLOW_ENTRY_PTR(entry_h); 975 976 /* Retain the pointer to the flow profile as the entry will be freed */ 977 prof = entry->prof; 978 979 if (prof) { 980 mutex_lock(&prof->entries_lock); 981 status = ice_flow_rem_entry_sync(hw, blk, entry); 982 mutex_unlock(&prof->entries_lock); 983 } 984 985 return status; 986 } 987 988 /** 989 * ice_flow_set_fld_ext - specifies locations of field from entry's input buffer 990 * @seg: packet segment the field being set belongs to 991 * @fld: field to be set 992 * @field_type: type of the field 993 * @val_loc: if not ICE_FLOW_FLD_OFF_INVAL, location of the value to match from 994 * entry's input buffer 995 * @mask_loc: if not ICE_FLOW_FLD_OFF_INVAL, location of mask value from entry's 996 * input buffer 997 * @last_loc: if not ICE_FLOW_FLD_OFF_INVAL, location of last/upper value from 998 * entry's input buffer 999 * 1000 * This helper function stores information of a field being matched, including 1001 * the type of the field and the locations of the value to match, the mask, and 1002 * and the upper-bound value in the start of the input buffer for a flow entry. 1003 * This function should only be used for fixed-size data structures. 1004 * 1005 * This function also opportunistically determines the protocol headers to be 1006 * present based on the fields being set. Some fields cannot be used alone to 1007 * determine the protocol headers present. Sometimes, fields for particular 1008 * protocol headers are not matched. In those cases, the protocol headers 1009 * must be explicitly set. 1010 */ 1011 static void 1012 ice_flow_set_fld_ext(struct ice_flow_seg_info *seg, enum ice_flow_field fld, 1013 enum ice_flow_fld_match_type field_type, u16 val_loc, 1014 u16 mask_loc, u16 last_loc) 1015 { 1016 u64 bit = BIT_ULL(fld); 1017 1018 seg->match |= bit; 1019 if (field_type == ICE_FLOW_FLD_TYPE_RANGE) 1020 seg->range |= bit; 1021 1022 seg->fields[fld].type = field_type; 1023 seg->fields[fld].src.val = val_loc; 1024 seg->fields[fld].src.mask = mask_loc; 1025 seg->fields[fld].src.last = last_loc; 1026 1027 ICE_FLOW_SET_HDRS(seg, ice_flds_info[fld].hdr); 1028 } 1029 1030 /** 1031 * ice_flow_set_fld - specifies locations of field from entry's input buffer 1032 * @seg: packet segment the field being set belongs to 1033 * @fld: field to be set 1034 * @val_loc: if not ICE_FLOW_FLD_OFF_INVAL, location of the value to match from 1035 * entry's input buffer 1036 * @mask_loc: if not ICE_FLOW_FLD_OFF_INVAL, location of mask value from entry's 1037 * input buffer 1038 * @last_loc: if not ICE_FLOW_FLD_OFF_INVAL, location of last/upper value from 1039 * entry's input buffer 1040 * @range: indicate if field being matched is to be in a range 1041 * 1042 * This function specifies the locations, in the form of byte offsets from the 1043 * start of the input buffer for a flow entry, from where the value to match, 1044 * the mask value, and upper value can be extracted. These locations are then 1045 * stored in the flow profile. When adding a flow entry associated with the 1046 * flow profile, these locations will be used to quickly extract the values and 1047 * create the content of a match entry. This function should only be used for 1048 * fixed-size data structures. 1049 */ 1050 void 1051 ice_flow_set_fld(struct ice_flow_seg_info *seg, enum ice_flow_field fld, 1052 u16 val_loc, u16 mask_loc, u16 last_loc, bool range) 1053 { 1054 enum ice_flow_fld_match_type t = range ? 1055 ICE_FLOW_FLD_TYPE_RANGE : ICE_FLOW_FLD_TYPE_REG; 1056 1057 ice_flow_set_fld_ext(seg, fld, t, val_loc, mask_loc, last_loc); 1058 } 1059 1060 /** 1061 * ice_flow_add_fld_raw - sets locations of a raw field from entry's input buf 1062 * @seg: packet segment the field being set belongs to 1063 * @off: offset of the raw field from the beginning of the segment in bytes 1064 * @len: length of the raw pattern to be matched 1065 * @val_loc: location of the value to match from entry's input buffer 1066 * @mask_loc: location of mask value from entry's input buffer 1067 * 1068 * This function specifies the offset of the raw field to be match from the 1069 * beginning of the specified packet segment, and the locations, in the form of 1070 * byte offsets from the start of the input buffer for a flow entry, from where 1071 * the value to match and the mask value to be extracted. These locations are 1072 * then stored in the flow profile. When adding flow entries to the associated 1073 * flow profile, these locations can be used to quickly extract the values to 1074 * create the content of a match entry. This function should only be used for 1075 * fixed-size data structures. 1076 */ 1077 void 1078 ice_flow_add_fld_raw(struct ice_flow_seg_info *seg, u16 off, u8 len, 1079 u16 val_loc, u16 mask_loc) 1080 { 1081 if (seg->raws_cnt < ICE_FLOW_SEG_RAW_FLD_MAX) { 1082 seg->raws[seg->raws_cnt].off = off; 1083 seg->raws[seg->raws_cnt].info.type = ICE_FLOW_FLD_TYPE_SIZE; 1084 seg->raws[seg->raws_cnt].info.src.val = val_loc; 1085 seg->raws[seg->raws_cnt].info.src.mask = mask_loc; 1086 /* The "last" field is used to store the length of the field */ 1087 seg->raws[seg->raws_cnt].info.src.last = len; 1088 } 1089 1090 /* Overflows of "raws" will be handled as an error condition later in 1091 * the flow when this information is processed. 1092 */ 1093 seg->raws_cnt++; 1094 } 1095 1096 #define ICE_FLOW_RSS_SEG_HDR_L3_MASKS \ 1097 (ICE_FLOW_SEG_HDR_IPV4 | ICE_FLOW_SEG_HDR_IPV6) 1098 1099 #define ICE_FLOW_RSS_SEG_HDR_L4_MASKS \ 1100 (ICE_FLOW_SEG_HDR_TCP | ICE_FLOW_SEG_HDR_UDP | ICE_FLOW_SEG_HDR_SCTP) 1101 1102 #define ICE_FLOW_RSS_SEG_HDR_VAL_MASKS \ 1103 (ICE_FLOW_RSS_SEG_HDR_L3_MASKS | \ 1104 ICE_FLOW_RSS_SEG_HDR_L4_MASKS) 1105 1106 /** 1107 * ice_flow_set_rss_seg_info - setup packet segments for RSS 1108 * @segs: pointer to the flow field segment(s) 1109 * @hash_fields: fields to be hashed on for the segment(s) 1110 * @flow_hdr: protocol header fields within a packet segment 1111 * 1112 * Helper function to extract fields from hash bitmap and use flow 1113 * header value to set flow field segment for further use in flow 1114 * profile entry or removal. 1115 */ 1116 static enum ice_status 1117 ice_flow_set_rss_seg_info(struct ice_flow_seg_info *segs, u64 hash_fields, 1118 u32 flow_hdr) 1119 { 1120 u64 val; 1121 u8 i; 1122 1123 for_each_set_bit(i, (unsigned long *)&hash_fields, 1124 ICE_FLOW_FIELD_IDX_MAX) 1125 ice_flow_set_fld(segs, (enum ice_flow_field)i, 1126 ICE_FLOW_FLD_OFF_INVAL, ICE_FLOW_FLD_OFF_INVAL, 1127 ICE_FLOW_FLD_OFF_INVAL, false); 1128 1129 ICE_FLOW_SET_HDRS(segs, flow_hdr); 1130 1131 if (segs->hdrs & ~ICE_FLOW_RSS_SEG_HDR_VAL_MASKS) 1132 return ICE_ERR_PARAM; 1133 1134 val = (u64)(segs->hdrs & ICE_FLOW_RSS_SEG_HDR_L3_MASKS); 1135 if (val && !is_power_of_2(val)) 1136 return ICE_ERR_CFG; 1137 1138 val = (u64)(segs->hdrs & ICE_FLOW_RSS_SEG_HDR_L4_MASKS); 1139 if (val && !is_power_of_2(val)) 1140 return ICE_ERR_CFG; 1141 1142 return 0; 1143 } 1144 1145 /** 1146 * ice_rem_vsi_rss_list - remove VSI from RSS list 1147 * @hw: pointer to the hardware structure 1148 * @vsi_handle: software VSI handle 1149 * 1150 * Remove the VSI from all RSS configurations in the list. 1151 */ 1152 void ice_rem_vsi_rss_list(struct ice_hw *hw, u16 vsi_handle) 1153 { 1154 struct ice_rss_cfg *r, *tmp; 1155 1156 if (list_empty(&hw->rss_list_head)) 1157 return; 1158 1159 mutex_lock(&hw->rss_locks); 1160 list_for_each_entry_safe(r, tmp, &hw->rss_list_head, l_entry) 1161 if (test_and_clear_bit(vsi_handle, r->vsis)) 1162 if (bitmap_empty(r->vsis, ICE_MAX_VSI)) { 1163 list_del(&r->l_entry); 1164 devm_kfree(ice_hw_to_dev(hw), r); 1165 } 1166 mutex_unlock(&hw->rss_locks); 1167 } 1168 1169 /** 1170 * ice_rem_vsi_rss_cfg - remove RSS configurations associated with VSI 1171 * @hw: pointer to the hardware structure 1172 * @vsi_handle: software VSI handle 1173 * 1174 * This function will iterate through all flow profiles and disassociate 1175 * the VSI from that profile. If the flow profile has no VSIs it will 1176 * be removed. 1177 */ 1178 enum ice_status ice_rem_vsi_rss_cfg(struct ice_hw *hw, u16 vsi_handle) 1179 { 1180 const enum ice_block blk = ICE_BLK_RSS; 1181 struct ice_flow_prof *p, *t; 1182 enum ice_status status = 0; 1183 1184 if (!ice_is_vsi_valid(hw, vsi_handle)) 1185 return ICE_ERR_PARAM; 1186 1187 if (list_empty(&hw->fl_profs[blk])) 1188 return 0; 1189 1190 mutex_lock(&hw->rss_locks); 1191 list_for_each_entry_safe(p, t, &hw->fl_profs[blk], l_entry) 1192 if (test_bit(vsi_handle, p->vsis)) { 1193 status = ice_flow_disassoc_prof(hw, blk, p, vsi_handle); 1194 if (status) 1195 break; 1196 1197 if (bitmap_empty(p->vsis, ICE_MAX_VSI)) { 1198 status = ice_flow_rem_prof(hw, blk, p->id); 1199 if (status) 1200 break; 1201 } 1202 } 1203 mutex_unlock(&hw->rss_locks); 1204 1205 return status; 1206 } 1207 1208 /** 1209 * ice_rem_rss_list - remove RSS configuration from list 1210 * @hw: pointer to the hardware structure 1211 * @vsi_handle: software VSI handle 1212 * @prof: pointer to flow profile 1213 * 1214 * Assumption: lock has already been acquired for RSS list 1215 */ 1216 static void 1217 ice_rem_rss_list(struct ice_hw *hw, u16 vsi_handle, struct ice_flow_prof *prof) 1218 { 1219 struct ice_rss_cfg *r, *tmp; 1220 1221 /* Search for RSS hash fields associated to the VSI that match the 1222 * hash configurations associated to the flow profile. If found 1223 * remove from the RSS entry list of the VSI context and delete entry. 1224 */ 1225 list_for_each_entry_safe(r, tmp, &hw->rss_list_head, l_entry) 1226 if (r->hashed_flds == prof->segs[prof->segs_cnt - 1].match && 1227 r->packet_hdr == prof->segs[prof->segs_cnt - 1].hdrs) { 1228 clear_bit(vsi_handle, r->vsis); 1229 if (bitmap_empty(r->vsis, ICE_MAX_VSI)) { 1230 list_del(&r->l_entry); 1231 devm_kfree(ice_hw_to_dev(hw), r); 1232 } 1233 return; 1234 } 1235 } 1236 1237 /** 1238 * ice_add_rss_list - add RSS configuration to list 1239 * @hw: pointer to the hardware structure 1240 * @vsi_handle: software VSI handle 1241 * @prof: pointer to flow profile 1242 * 1243 * Assumption: lock has already been acquired for RSS list 1244 */ 1245 static enum ice_status 1246 ice_add_rss_list(struct ice_hw *hw, u16 vsi_handle, struct ice_flow_prof *prof) 1247 { 1248 struct ice_rss_cfg *r, *rss_cfg; 1249 1250 list_for_each_entry(r, &hw->rss_list_head, l_entry) 1251 if (r->hashed_flds == prof->segs[prof->segs_cnt - 1].match && 1252 r->packet_hdr == prof->segs[prof->segs_cnt - 1].hdrs) { 1253 set_bit(vsi_handle, r->vsis); 1254 return 0; 1255 } 1256 1257 rss_cfg = devm_kzalloc(ice_hw_to_dev(hw), sizeof(*rss_cfg), 1258 GFP_KERNEL); 1259 if (!rss_cfg) 1260 return ICE_ERR_NO_MEMORY; 1261 1262 rss_cfg->hashed_flds = prof->segs[prof->segs_cnt - 1].match; 1263 rss_cfg->packet_hdr = prof->segs[prof->segs_cnt - 1].hdrs; 1264 set_bit(vsi_handle, rss_cfg->vsis); 1265 1266 list_add_tail(&rss_cfg->l_entry, &hw->rss_list_head); 1267 1268 return 0; 1269 } 1270 1271 #define ICE_FLOW_PROF_HASH_S 0 1272 #define ICE_FLOW_PROF_HASH_M (0xFFFFFFFFULL << ICE_FLOW_PROF_HASH_S) 1273 #define ICE_FLOW_PROF_HDR_S 32 1274 #define ICE_FLOW_PROF_HDR_M (0x3FFFFFFFULL << ICE_FLOW_PROF_HDR_S) 1275 #define ICE_FLOW_PROF_ENCAP_S 63 1276 #define ICE_FLOW_PROF_ENCAP_M (BIT_ULL(ICE_FLOW_PROF_ENCAP_S)) 1277 1278 #define ICE_RSS_OUTER_HEADERS 1 1279 #define ICE_RSS_INNER_HEADERS 2 1280 1281 /* Flow profile ID format: 1282 * [0:31] - Packet match fields 1283 * [32:62] - Protocol header 1284 * [63] - Encapsulation flag, 0 if non-tunneled, 1 if tunneled 1285 */ 1286 #define ICE_FLOW_GEN_PROFID(hash, hdr, segs_cnt) \ 1287 (u64)(((u64)(hash) & ICE_FLOW_PROF_HASH_M) | \ 1288 (((u64)(hdr) << ICE_FLOW_PROF_HDR_S) & ICE_FLOW_PROF_HDR_M) | \ 1289 ((u8)((segs_cnt) - 1) ? ICE_FLOW_PROF_ENCAP_M : 0)) 1290 1291 /** 1292 * ice_add_rss_cfg_sync - add an RSS configuration 1293 * @hw: pointer to the hardware structure 1294 * @vsi_handle: software VSI handle 1295 * @hashed_flds: hash bit fields (ICE_FLOW_HASH_*) to configure 1296 * @addl_hdrs: protocol header fields 1297 * @segs_cnt: packet segment count 1298 * 1299 * Assumption: lock has already been acquired for RSS list 1300 */ 1301 static enum ice_status 1302 ice_add_rss_cfg_sync(struct ice_hw *hw, u16 vsi_handle, u64 hashed_flds, 1303 u32 addl_hdrs, u8 segs_cnt) 1304 { 1305 const enum ice_block blk = ICE_BLK_RSS; 1306 struct ice_flow_prof *prof = NULL; 1307 struct ice_flow_seg_info *segs; 1308 enum ice_status status; 1309 1310 if (!segs_cnt || segs_cnt > ICE_FLOW_SEG_MAX) 1311 return ICE_ERR_PARAM; 1312 1313 segs = kcalloc(segs_cnt, sizeof(*segs), GFP_KERNEL); 1314 if (!segs) 1315 return ICE_ERR_NO_MEMORY; 1316 1317 /* Construct the packet segment info from the hashed fields */ 1318 status = ice_flow_set_rss_seg_info(&segs[segs_cnt - 1], hashed_flds, 1319 addl_hdrs); 1320 if (status) 1321 goto exit; 1322 1323 /* Search for a flow profile that has matching headers, hash fields 1324 * and has the input VSI associated to it. If found, no further 1325 * operations required and exit. 1326 */ 1327 prof = ice_flow_find_prof_conds(hw, blk, ICE_FLOW_RX, segs, segs_cnt, 1328 vsi_handle, 1329 ICE_FLOW_FIND_PROF_CHK_FLDS | 1330 ICE_FLOW_FIND_PROF_CHK_VSI); 1331 if (prof) 1332 goto exit; 1333 1334 /* Check if a flow profile exists with the same protocol headers and 1335 * associated with the input VSI. If so disassociate the VSI from 1336 * this profile. The VSI will be added to a new profile created with 1337 * the protocol header and new hash field configuration. 1338 */ 1339 prof = ice_flow_find_prof_conds(hw, blk, ICE_FLOW_RX, segs, segs_cnt, 1340 vsi_handle, ICE_FLOW_FIND_PROF_CHK_VSI); 1341 if (prof) { 1342 status = ice_flow_disassoc_prof(hw, blk, prof, vsi_handle); 1343 if (!status) 1344 ice_rem_rss_list(hw, vsi_handle, prof); 1345 else 1346 goto exit; 1347 1348 /* Remove profile if it has no VSIs associated */ 1349 if (bitmap_empty(prof->vsis, ICE_MAX_VSI)) { 1350 status = ice_flow_rem_prof(hw, blk, prof->id); 1351 if (status) 1352 goto exit; 1353 } 1354 } 1355 1356 /* Search for a profile that has same match fields only. If this 1357 * exists then associate the VSI to this profile. 1358 */ 1359 prof = ice_flow_find_prof_conds(hw, blk, ICE_FLOW_RX, segs, segs_cnt, 1360 vsi_handle, 1361 ICE_FLOW_FIND_PROF_CHK_FLDS); 1362 if (prof) { 1363 status = ice_flow_assoc_prof(hw, blk, prof, vsi_handle); 1364 if (!status) 1365 status = ice_add_rss_list(hw, vsi_handle, prof); 1366 goto exit; 1367 } 1368 1369 /* Create a new flow profile with generated profile and packet 1370 * segment information. 1371 */ 1372 status = ice_flow_add_prof(hw, blk, ICE_FLOW_RX, 1373 ICE_FLOW_GEN_PROFID(hashed_flds, 1374 segs[segs_cnt - 1].hdrs, 1375 segs_cnt), 1376 segs, segs_cnt, &prof); 1377 if (status) 1378 goto exit; 1379 1380 status = ice_flow_assoc_prof(hw, blk, prof, vsi_handle); 1381 /* If association to a new flow profile failed then this profile can 1382 * be removed. 1383 */ 1384 if (status) { 1385 ice_flow_rem_prof(hw, blk, prof->id); 1386 goto exit; 1387 } 1388 1389 status = ice_add_rss_list(hw, vsi_handle, prof); 1390 1391 exit: 1392 kfree(segs); 1393 return status; 1394 } 1395 1396 /** 1397 * ice_add_rss_cfg - add an RSS configuration with specified hashed fields 1398 * @hw: pointer to the hardware structure 1399 * @vsi_handle: software VSI handle 1400 * @hashed_flds: hash bit fields (ICE_FLOW_HASH_*) to configure 1401 * @addl_hdrs: protocol header fields 1402 * 1403 * This function will generate a flow profile based on fields associated with 1404 * the input fields to hash on, the flow type and use the VSI number to add 1405 * a flow entry to the profile. 1406 */ 1407 enum ice_status 1408 ice_add_rss_cfg(struct ice_hw *hw, u16 vsi_handle, u64 hashed_flds, 1409 u32 addl_hdrs) 1410 { 1411 enum ice_status status; 1412 1413 if (hashed_flds == ICE_HASH_INVALID || 1414 !ice_is_vsi_valid(hw, vsi_handle)) 1415 return ICE_ERR_PARAM; 1416 1417 mutex_lock(&hw->rss_locks); 1418 status = ice_add_rss_cfg_sync(hw, vsi_handle, hashed_flds, addl_hdrs, 1419 ICE_RSS_OUTER_HEADERS); 1420 if (!status) 1421 status = ice_add_rss_cfg_sync(hw, vsi_handle, hashed_flds, 1422 addl_hdrs, ICE_RSS_INNER_HEADERS); 1423 mutex_unlock(&hw->rss_locks); 1424 1425 return status; 1426 } 1427 1428 /* Mapping of AVF hash bit fields to an L3-L4 hash combination. 1429 * As the ice_flow_avf_hdr_field represent individual bit shifts in a hash, 1430 * convert its values to their appropriate flow L3, L4 values. 1431 */ 1432 #define ICE_FLOW_AVF_RSS_IPV4_MASKS \ 1433 (BIT_ULL(ICE_AVF_FLOW_FIELD_IPV4_OTHER) | \ 1434 BIT_ULL(ICE_AVF_FLOW_FIELD_FRAG_IPV4)) 1435 #define ICE_FLOW_AVF_RSS_TCP_IPV4_MASKS \ 1436 (BIT_ULL(ICE_AVF_FLOW_FIELD_IPV4_TCP_SYN_NO_ACK) | \ 1437 BIT_ULL(ICE_AVF_FLOW_FIELD_IPV4_TCP)) 1438 #define ICE_FLOW_AVF_RSS_UDP_IPV4_MASKS \ 1439 (BIT_ULL(ICE_AVF_FLOW_FIELD_UNICAST_IPV4_UDP) | \ 1440 BIT_ULL(ICE_AVF_FLOW_FIELD_MULTICAST_IPV4_UDP) | \ 1441 BIT_ULL(ICE_AVF_FLOW_FIELD_IPV4_UDP)) 1442 #define ICE_FLOW_AVF_RSS_ALL_IPV4_MASKS \ 1443 (ICE_FLOW_AVF_RSS_TCP_IPV4_MASKS | ICE_FLOW_AVF_RSS_UDP_IPV4_MASKS | \ 1444 ICE_FLOW_AVF_RSS_IPV4_MASKS | BIT_ULL(ICE_AVF_FLOW_FIELD_IPV4_SCTP)) 1445 1446 #define ICE_FLOW_AVF_RSS_IPV6_MASKS \ 1447 (BIT_ULL(ICE_AVF_FLOW_FIELD_IPV6_OTHER) | \ 1448 BIT_ULL(ICE_AVF_FLOW_FIELD_FRAG_IPV6)) 1449 #define ICE_FLOW_AVF_RSS_UDP_IPV6_MASKS \ 1450 (BIT_ULL(ICE_AVF_FLOW_FIELD_UNICAST_IPV6_UDP) | \ 1451 BIT_ULL(ICE_AVF_FLOW_FIELD_MULTICAST_IPV6_UDP) | \ 1452 BIT_ULL(ICE_AVF_FLOW_FIELD_IPV6_UDP)) 1453 #define ICE_FLOW_AVF_RSS_TCP_IPV6_MASKS \ 1454 (BIT_ULL(ICE_AVF_FLOW_FIELD_IPV6_TCP_SYN_NO_ACK) | \ 1455 BIT_ULL(ICE_AVF_FLOW_FIELD_IPV6_TCP)) 1456 #define ICE_FLOW_AVF_RSS_ALL_IPV6_MASKS \ 1457 (ICE_FLOW_AVF_RSS_TCP_IPV6_MASKS | ICE_FLOW_AVF_RSS_UDP_IPV6_MASKS | \ 1458 ICE_FLOW_AVF_RSS_IPV6_MASKS | BIT_ULL(ICE_AVF_FLOW_FIELD_IPV6_SCTP)) 1459 1460 /** 1461 * ice_add_avf_rss_cfg - add an RSS configuration for AVF driver 1462 * @hw: pointer to the hardware structure 1463 * @vsi_handle: software VSI handle 1464 * @avf_hash: hash bit fields (ICE_AVF_FLOW_FIELD_*) to configure 1465 * 1466 * This function will take the hash bitmap provided by the AVF driver via a 1467 * message, convert it to ICE-compatible values, and configure RSS flow 1468 * profiles. 1469 */ 1470 enum ice_status 1471 ice_add_avf_rss_cfg(struct ice_hw *hw, u16 vsi_handle, u64 avf_hash) 1472 { 1473 enum ice_status status = 0; 1474 u64 hash_flds; 1475 1476 if (avf_hash == ICE_AVF_FLOW_FIELD_INVALID || 1477 !ice_is_vsi_valid(hw, vsi_handle)) 1478 return ICE_ERR_PARAM; 1479 1480 /* Make sure no unsupported bits are specified */ 1481 if (avf_hash & ~(ICE_FLOW_AVF_RSS_ALL_IPV4_MASKS | 1482 ICE_FLOW_AVF_RSS_ALL_IPV6_MASKS)) 1483 return ICE_ERR_CFG; 1484 1485 hash_flds = avf_hash; 1486 1487 /* Always create an L3 RSS configuration for any L4 RSS configuration */ 1488 if (hash_flds & ICE_FLOW_AVF_RSS_ALL_IPV4_MASKS) 1489 hash_flds |= ICE_FLOW_AVF_RSS_IPV4_MASKS; 1490 1491 if (hash_flds & ICE_FLOW_AVF_RSS_ALL_IPV6_MASKS) 1492 hash_flds |= ICE_FLOW_AVF_RSS_IPV6_MASKS; 1493 1494 /* Create the corresponding RSS configuration for each valid hash bit */ 1495 while (hash_flds) { 1496 u64 rss_hash = ICE_HASH_INVALID; 1497 1498 if (hash_flds & ICE_FLOW_AVF_RSS_ALL_IPV4_MASKS) { 1499 if (hash_flds & ICE_FLOW_AVF_RSS_IPV4_MASKS) { 1500 rss_hash = ICE_FLOW_HASH_IPV4; 1501 hash_flds &= ~ICE_FLOW_AVF_RSS_IPV4_MASKS; 1502 } else if (hash_flds & 1503 ICE_FLOW_AVF_RSS_TCP_IPV4_MASKS) { 1504 rss_hash = ICE_FLOW_HASH_IPV4 | 1505 ICE_FLOW_HASH_TCP_PORT; 1506 hash_flds &= ~ICE_FLOW_AVF_RSS_TCP_IPV4_MASKS; 1507 } else if (hash_flds & 1508 ICE_FLOW_AVF_RSS_UDP_IPV4_MASKS) { 1509 rss_hash = ICE_FLOW_HASH_IPV4 | 1510 ICE_FLOW_HASH_UDP_PORT; 1511 hash_flds &= ~ICE_FLOW_AVF_RSS_UDP_IPV4_MASKS; 1512 } else if (hash_flds & 1513 BIT_ULL(ICE_AVF_FLOW_FIELD_IPV4_SCTP)) { 1514 rss_hash = ICE_FLOW_HASH_IPV4 | 1515 ICE_FLOW_HASH_SCTP_PORT; 1516 hash_flds &= 1517 ~BIT_ULL(ICE_AVF_FLOW_FIELD_IPV4_SCTP); 1518 } 1519 } else if (hash_flds & ICE_FLOW_AVF_RSS_ALL_IPV6_MASKS) { 1520 if (hash_flds & ICE_FLOW_AVF_RSS_IPV6_MASKS) { 1521 rss_hash = ICE_FLOW_HASH_IPV6; 1522 hash_flds &= ~ICE_FLOW_AVF_RSS_IPV6_MASKS; 1523 } else if (hash_flds & 1524 ICE_FLOW_AVF_RSS_TCP_IPV6_MASKS) { 1525 rss_hash = ICE_FLOW_HASH_IPV6 | 1526 ICE_FLOW_HASH_TCP_PORT; 1527 hash_flds &= ~ICE_FLOW_AVF_RSS_TCP_IPV6_MASKS; 1528 } else if (hash_flds & 1529 ICE_FLOW_AVF_RSS_UDP_IPV6_MASKS) { 1530 rss_hash = ICE_FLOW_HASH_IPV6 | 1531 ICE_FLOW_HASH_UDP_PORT; 1532 hash_flds &= ~ICE_FLOW_AVF_RSS_UDP_IPV6_MASKS; 1533 } else if (hash_flds & 1534 BIT_ULL(ICE_AVF_FLOW_FIELD_IPV6_SCTP)) { 1535 rss_hash = ICE_FLOW_HASH_IPV6 | 1536 ICE_FLOW_HASH_SCTP_PORT; 1537 hash_flds &= 1538 ~BIT_ULL(ICE_AVF_FLOW_FIELD_IPV6_SCTP); 1539 } 1540 } 1541 1542 if (rss_hash == ICE_HASH_INVALID) 1543 return ICE_ERR_OUT_OF_RANGE; 1544 1545 status = ice_add_rss_cfg(hw, vsi_handle, rss_hash, 1546 ICE_FLOW_SEG_HDR_NONE); 1547 if (status) 1548 break; 1549 } 1550 1551 return status; 1552 } 1553 1554 /** 1555 * ice_replay_rss_cfg - replay RSS configurations associated with VSI 1556 * @hw: pointer to the hardware structure 1557 * @vsi_handle: software VSI handle 1558 */ 1559 enum ice_status ice_replay_rss_cfg(struct ice_hw *hw, u16 vsi_handle) 1560 { 1561 enum ice_status status = 0; 1562 struct ice_rss_cfg *r; 1563 1564 if (!ice_is_vsi_valid(hw, vsi_handle)) 1565 return ICE_ERR_PARAM; 1566 1567 mutex_lock(&hw->rss_locks); 1568 list_for_each_entry(r, &hw->rss_list_head, l_entry) { 1569 if (test_bit(vsi_handle, r->vsis)) { 1570 status = ice_add_rss_cfg_sync(hw, vsi_handle, 1571 r->hashed_flds, 1572 r->packet_hdr, 1573 ICE_RSS_OUTER_HEADERS); 1574 if (status) 1575 break; 1576 status = ice_add_rss_cfg_sync(hw, vsi_handle, 1577 r->hashed_flds, 1578 r->packet_hdr, 1579 ICE_RSS_INNER_HEADERS); 1580 if (status) 1581 break; 1582 } 1583 } 1584 mutex_unlock(&hw->rss_locks); 1585 1586 return status; 1587 } 1588 1589 /** 1590 * ice_get_rss_cfg - returns hashed fields for the given header types 1591 * @hw: pointer to the hardware structure 1592 * @vsi_handle: software VSI handle 1593 * @hdrs: protocol header type 1594 * 1595 * This function will return the match fields of the first instance of flow 1596 * profile having the given header types and containing input VSI 1597 */ 1598 u64 ice_get_rss_cfg(struct ice_hw *hw, u16 vsi_handle, u32 hdrs) 1599 { 1600 u64 rss_hash = ICE_HASH_INVALID; 1601 struct ice_rss_cfg *r; 1602 1603 /* verify if the protocol header is non zero and VSI is valid */ 1604 if (hdrs == ICE_FLOW_SEG_HDR_NONE || !ice_is_vsi_valid(hw, vsi_handle)) 1605 return ICE_HASH_INVALID; 1606 1607 mutex_lock(&hw->rss_locks); 1608 list_for_each_entry(r, &hw->rss_list_head, l_entry) 1609 if (test_bit(vsi_handle, r->vsis) && 1610 r->packet_hdr == hdrs) { 1611 rss_hash = r->hashed_flds; 1612 break; 1613 } 1614 mutex_unlock(&hw->rss_locks); 1615 1616 return rss_hash; 1617 } 1618