Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/ixl/ixl_txrx.c
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1 /****************************************************************************** 2 3 Copyright (c) 2013-2018, Intel Corporation 4 All rights reserved. 5 6 Redistribution and use in source and binary forms, with or without 7 modification, are permitted provided that the following conditions are met: 8 9 1. Redistributions of source code must retain the above copyright notice, 10 this list of conditions and the following disclaimer. 11 12 2. Redistributions in binary form must reproduce the above copyright 13 notice, this list of conditions and the following disclaimer in the 14 documentation and/or other materials provided with the distribution. 15 16 3. Neither the name of the Intel Corporation nor the names of its 17 contributors may be used to endorse or promote products derived from 18 this software without specific prior written permission. 19 20 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 21 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 24 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 POSSIBILITY OF SUCH DAMAGE. 31 32 ******************************************************************************/ 33 /*$FreeBSD$*/ 34 35 /* 36 ** IXL driver TX/RX Routines: 37 ** This was seperated to allow usage by 38 ** both the PF and VF drivers. 39 */ 40 41 #ifndef IXL_STANDALONE_BUILD 42 #include "opt_inet.h" 43 #include "opt_inet6.h" 44 #include "opt_rss.h" 45 #endif 46 47 #include "ixl.h" 48 49 #ifdef RSS 50 #include <net/rss_config.h> 51 #endif 52 53 /* Local Prototypes */ 54 static u8 ixl_rx_checksum(if_rxd_info_t ri, u32 status, u32 error, u8 ptype); 55 56 static int ixl_isc_txd_encap(void *arg, if_pkt_info_t pi); 57 static void ixl_isc_txd_flush(void *arg, uint16_t txqid, qidx_t pidx); 58 static int ixl_isc_txd_credits_update_hwb(void *arg, uint16_t txqid, bool clear); 59 static int ixl_isc_txd_credits_update_dwb(void *arg, uint16_t txqid, bool clear); 60 61 static void ixl_isc_rxd_refill(void *arg, if_rxd_update_t iru); 62 static void ixl_isc_rxd_flush(void *arg, uint16_t rxqid, uint8_t flid __unused, 63 qidx_t pidx); 64 static int ixl_isc_rxd_available(void *arg, uint16_t rxqid, qidx_t idx, 65 qidx_t budget); 66 static int ixl_isc_rxd_pkt_get(void *arg, if_rxd_info_t ri); 67 68 struct if_txrx ixl_txrx_hwb = { 69 ixl_isc_txd_encap, 70 ixl_isc_txd_flush, 71 ixl_isc_txd_credits_update_hwb, 72 ixl_isc_rxd_available, 73 ixl_isc_rxd_pkt_get, 74 ixl_isc_rxd_refill, 75 ixl_isc_rxd_flush, 76 NULL 77 }; 78 79 struct if_txrx ixl_txrx_dwb = { 80 ixl_isc_txd_encap, 81 ixl_isc_txd_flush, 82 ixl_isc_txd_credits_update_dwb, 83 ixl_isc_rxd_available, 84 ixl_isc_rxd_pkt_get, 85 ixl_isc_rxd_refill, 86 ixl_isc_rxd_flush, 87 NULL 88 }; 89 90 /* 91 * @key key is saved into this parameter 92 */ 93 void 94 ixl_get_default_rss_key(u32 *key) 95 { 96 MPASS(key != NULL); 97 98 u32 rss_seed[IXL_RSS_KEY_SIZE_REG] = {0x41b01687, 99 0x183cfd8c, 0xce880440, 0x580cbc3c, 100 0x35897377, 0x328b25e1, 0x4fa98922, 101 0xb7d90c14, 0xd5bad70d, 0xcd15a2c1, 102 0x0, 0x0, 0x0}; 103 104 bcopy(rss_seed, key, IXL_RSS_KEY_SIZE); 105 } 106 107 /** 108 * i40e_vc_stat_str - convert virtchnl status err code to a string 109 * @hw: pointer to the HW structure 110 * @stat_err: the status error code to convert 111 **/ 112 const char * 113 i40e_vc_stat_str(struct i40e_hw *hw, enum virtchnl_status_code stat_err) 114 { 115 switch (stat_err) { 116 case VIRTCHNL_STATUS_SUCCESS: 117 return "OK"; 118 case VIRTCHNL_ERR_PARAM: 119 return "VIRTCHNL_ERR_PARAM"; 120 case VIRTCHNL_STATUS_ERR_OPCODE_MISMATCH: 121 return "VIRTCHNL_STATUS_ERR_OPCODE_MISMATCH"; 122 case VIRTCHNL_STATUS_ERR_CQP_COMPL_ERROR: 123 return "VIRTCHNL_STATUS_ERR_CQP_COMPL_ERROR"; 124 case VIRTCHNL_STATUS_ERR_INVALID_VF_ID: 125 return "VIRTCHNL_STATUS_ERR_INVALID_VF_ID"; 126 case VIRTCHNL_STATUS_NOT_SUPPORTED: 127 return "VIRTCHNL_STATUS_NOT_SUPPORTED"; 128 } 129 130 snprintf(hw->err_str, sizeof(hw->err_str), "%d", stat_err); 131 return hw->err_str; 132 } 133 134 void 135 ixl_debug_core(device_t dev, u32 enabled_mask, u32 mask, char *fmt, ...) 136 { 137 va_list args; 138 139 if (!(mask & enabled_mask)) 140 return; 141 142 /* Re-implement device_printf() */ 143 device_print_prettyname(dev); 144 va_start(args, fmt); 145 vprintf(fmt, args); 146 va_end(args); 147 } 148 149 static bool 150 ixl_is_tx_desc_done(struct tx_ring *txr, int idx) 151 { 152 return (((txr->tx_base[idx].cmd_type_offset_bsz >> I40E_TXD_QW1_DTYPE_SHIFT) 153 & I40E_TXD_QW1_DTYPE_MASK) == I40E_TX_DESC_DTYPE_DESC_DONE); 154 } 155 156 static int 157 ixl_tso_detect_sparse(bus_dma_segment_t *segs, int nsegs, if_pkt_info_t pi) 158 { 159 int count, curseg, i, hlen, segsz, seglen, tsolen; 160 161 if (nsegs <= IXL_MAX_TX_SEGS-2) 162 return (0); 163 segsz = pi->ipi_tso_segsz; 164 curseg = count = 0; 165 166 hlen = pi->ipi_ehdrlen + pi->ipi_ip_hlen + pi->ipi_tcp_hlen; 167 tsolen = pi->ipi_len - hlen; 168 169 i = 0; 170 curseg = segs[0].ds_len; 171 while (hlen > 0) { 172 count++; 173 if (count > IXL_MAX_TX_SEGS - 2) 174 return (1); 175 if (curseg == 0) { 176 i++; 177 if (__predict_false(i == nsegs)) 178 return (1); 179 180 curseg = segs[i].ds_len; 181 } 182 seglen = min(curseg, hlen); 183 curseg -= seglen; 184 hlen -= seglen; 185 // printf("H:seglen = %d, count=%d\n", seglen, count); 186 } 187 while (tsolen > 0) { 188 segsz = pi->ipi_tso_segsz; 189 while (segsz > 0 && tsolen != 0) { 190 count++; 191 if (count > IXL_MAX_TX_SEGS - 2) { 192 // printf("bad: count = %d\n", count); 193 return (1); 194 } 195 if (curseg == 0) { 196 i++; 197 if (__predict_false(i == nsegs)) { 198 // printf("bad: tsolen = %d", tsolen); 199 return (1); 200 } 201 curseg = segs[i].ds_len; 202 } 203 seglen = min(curseg, segsz); 204 segsz -= seglen; 205 curseg -= seglen; 206 tsolen -= seglen; 207 // printf("D:seglen = %d, count=%d\n", seglen, count); 208 } 209 count = 0; 210 } 211 212 return (0); 213 } 214 215 /********************************************************************* 216 * 217 * Setup descriptor for hw offloads 218 * 219 **********************************************************************/ 220 221 static void 222 ixl_tx_setup_offload(struct ixl_tx_queue *que, 223 if_pkt_info_t pi, u32 *cmd, u32 *off) 224 { 225 switch (pi->ipi_etype) { 226 #ifdef INET 227 case ETHERTYPE_IP: 228 if (pi->ipi_csum_flags & IXL_CSUM_IPV4) 229 *cmd |= I40E_TX_DESC_CMD_IIPT_IPV4_CSUM; 230 else 231 *cmd |= I40E_TX_DESC_CMD_IIPT_IPV4; 232 break; 233 #endif 234 #ifdef INET6 235 case ETHERTYPE_IPV6: 236 *cmd |= I40E_TX_DESC_CMD_IIPT_IPV6; 237 break; 238 #endif 239 default: 240 break; 241 } 242 243 *off |= (pi->ipi_ehdrlen >> 1) << I40E_TX_DESC_LENGTH_MACLEN_SHIFT; 244 *off |= (pi->ipi_ip_hlen >> 2) << I40E_TX_DESC_LENGTH_IPLEN_SHIFT; 245 246 switch (pi->ipi_ipproto) { 247 case IPPROTO_TCP: 248 if (pi->ipi_csum_flags & IXL_CSUM_TCP) { 249 *cmd |= I40E_TX_DESC_CMD_L4T_EOFT_TCP; 250 *off |= (pi->ipi_tcp_hlen >> 2) << 251 I40E_TX_DESC_LENGTH_L4_FC_LEN_SHIFT; 252 /* Check for NO_HEAD MDD event */ 253 MPASS(pi->ipi_tcp_hlen != 0); 254 } 255 break; 256 case IPPROTO_UDP: 257 if (pi->ipi_csum_flags & IXL_CSUM_UDP) { 258 *cmd |= I40E_TX_DESC_CMD_L4T_EOFT_UDP; 259 *off |= (sizeof(struct udphdr) >> 2) << 260 I40E_TX_DESC_LENGTH_L4_FC_LEN_SHIFT; 261 } 262 break; 263 case IPPROTO_SCTP: 264 if (pi->ipi_csum_flags & IXL_CSUM_SCTP) { 265 *cmd |= I40E_TX_DESC_CMD_L4T_EOFT_SCTP; 266 *off |= (sizeof(struct sctphdr) >> 2) << 267 I40E_TX_DESC_LENGTH_L4_FC_LEN_SHIFT; 268 } 269 /* Fall Thru */ 270 default: 271 break; 272 } 273 } 274 275 /********************************************************************** 276 * 277 * Setup context for hardware segmentation offload (TSO) 278 * 279 **********************************************************************/ 280 static int 281 ixl_tso_setup(struct tx_ring *txr, if_pkt_info_t pi) 282 { 283 if_softc_ctx_t scctx; 284 struct i40e_tx_context_desc *TXD; 285 u32 cmd, mss, type, tsolen; 286 int idx, total_hdr_len; 287 u64 type_cmd_tso_mss; 288 289 idx = pi->ipi_pidx; 290 TXD = (struct i40e_tx_context_desc *) &txr->tx_base[idx]; 291 total_hdr_len = pi->ipi_ehdrlen + pi->ipi_ip_hlen + pi->ipi_tcp_hlen; 292 tsolen = pi->ipi_len - total_hdr_len; 293 scctx = txr->que->vsi->shared; 294 295 type = I40E_TX_DESC_DTYPE_CONTEXT; 296 cmd = I40E_TX_CTX_DESC_TSO; 297 /* 298 * TSO MSS must not be less than 64; this prevents a 299 * BAD_LSO_MSS MDD event when the MSS is too small. 300 */ 301 if (pi->ipi_tso_segsz < IXL_MIN_TSO_MSS) { 302 txr->mss_too_small++; 303 pi->ipi_tso_segsz = IXL_MIN_TSO_MSS; 304 } 305 mss = pi->ipi_tso_segsz; 306 307 /* Check for BAD_LS0_MSS MDD event (mss too large) */ 308 MPASS(mss <= IXL_MAX_TSO_MSS); 309 /* Check for NO_HEAD MDD event (header lengths are 0) */ 310 MPASS(pi->ipi_ehdrlen != 0); 311 MPASS(pi->ipi_ip_hlen != 0); 312 /* Partial check for BAD_LSO_LEN MDD event */ 313 MPASS(tsolen != 0); 314 /* Partial check for WRONG_SIZE MDD event (during TSO) */ 315 MPASS(total_hdr_len + mss <= IXL_MAX_FRAME); 316 317 type_cmd_tso_mss = ((u64)type << I40E_TXD_CTX_QW1_DTYPE_SHIFT) | 318 ((u64)cmd << I40E_TXD_CTX_QW1_CMD_SHIFT) | 319 ((u64)tsolen << I40E_TXD_CTX_QW1_TSO_LEN_SHIFT) | 320 ((u64)mss << I40E_TXD_CTX_QW1_MSS_SHIFT); 321 TXD->type_cmd_tso_mss = htole64(type_cmd_tso_mss); 322 323 TXD->tunneling_params = htole32(0); 324 txr->que->tso++; 325 326 return ((idx + 1) & (scctx->isc_ntxd[0]-1)); 327 } 328 329 /********************************************************************* 330 * 331 * This routine maps the mbufs to tx descriptors, allowing the 332 * TX engine to transmit the packets. 333 * - return 0 on success, positive on failure 334 * 335 **********************************************************************/ 336 #define IXL_TXD_CMD (I40E_TX_DESC_CMD_EOP | I40E_TX_DESC_CMD_RS) 337 338 static int 339 ixl_isc_txd_encap(void *arg, if_pkt_info_t pi) 340 { 341 struct ixl_vsi *vsi = arg; 342 if_softc_ctx_t scctx = vsi->shared; 343 struct ixl_tx_queue *que = &vsi->tx_queues[pi->ipi_qsidx]; 344 struct tx_ring *txr = &que->txr; 345 int nsegs = pi->ipi_nsegs; 346 bus_dma_segment_t *segs = pi->ipi_segs; 347 struct i40e_tx_desc *txd = NULL; 348 int i, j, mask, pidx_last; 349 u32 cmd, off, tx_intr; 350 351 cmd = off = 0; 352 i = pi->ipi_pidx; 353 354 tx_intr = (pi->ipi_flags & IPI_TX_INTR); 355 356 /* Set up the TSO/CSUM offload */ 357 if (pi->ipi_csum_flags & CSUM_OFFLOAD) { 358 /* Set up the TSO context descriptor if required */ 359 if (pi->ipi_csum_flags & CSUM_TSO) { 360 /* Prevent MAX_BUFF MDD event (for TSO) */ 361 if (ixl_tso_detect_sparse(segs, nsegs, pi)) 362 return (EFBIG); 363 i = ixl_tso_setup(txr, pi); 364 } 365 ixl_tx_setup_offload(que, pi, &cmd, &off); 366 } 367 if (pi->ipi_mflags & M_VLANTAG) 368 cmd |= I40E_TX_DESC_CMD_IL2TAG1; 369 370 cmd |= I40E_TX_DESC_CMD_ICRC; 371 mask = scctx->isc_ntxd[0] - 1; 372 /* Check for WRONG_SIZE MDD event */ 373 MPASS(pi->ipi_len >= IXL_MIN_FRAME); 374 #ifdef INVARIANTS 375 if (!(pi->ipi_csum_flags & CSUM_TSO)) 376 MPASS(pi->ipi_len <= IXL_MAX_FRAME); 377 #endif 378 for (j = 0; j < nsegs; j++) { 379 bus_size_t seglen; 380 381 txd = &txr->tx_base[i]; 382 seglen = segs[j].ds_len; 383 384 /* Check for ZERO_BSIZE MDD event */ 385 MPASS(seglen != 0); 386 387 txd->buffer_addr = htole64(segs[j].ds_addr); 388 txd->cmd_type_offset_bsz = 389 htole64(I40E_TX_DESC_DTYPE_DATA 390 | ((u64)cmd << I40E_TXD_QW1_CMD_SHIFT) 391 | ((u64)off << I40E_TXD_QW1_OFFSET_SHIFT) 392 | ((u64)seglen << I40E_TXD_QW1_TX_BUF_SZ_SHIFT) 393 | ((u64)htole16(pi->ipi_vtag) << I40E_TXD_QW1_L2TAG1_SHIFT)); 394 395 txr->tx_bytes += seglen; 396 pidx_last = i; 397 i = (i+1) & mask; 398 } 399 /* Set the last descriptor for report */ 400 txd->cmd_type_offset_bsz |= 401 htole64(((u64)IXL_TXD_CMD << I40E_TXD_QW1_CMD_SHIFT)); 402 /* Add to report status array (if using TX interrupts) */ 403 if (!vsi->enable_head_writeback && tx_intr) { 404 txr->tx_rsq[txr->tx_rs_pidx] = pidx_last; 405 txr->tx_rs_pidx = (txr->tx_rs_pidx+1) & mask; 406 MPASS(txr->tx_rs_pidx != txr->tx_rs_cidx); 407 } 408 pi->ipi_new_pidx = i; 409 410 ++txr->tx_packets; 411 return (0); 412 } 413 414 static void 415 ixl_isc_txd_flush(void *arg, uint16_t txqid, qidx_t pidx) 416 { 417 struct ixl_vsi *vsi = arg; 418 struct tx_ring *txr = &vsi->tx_queues[txqid].txr; 419 420 /* 421 * Advance the Transmit Descriptor Tail (Tdt), this tells the 422 * hardware that this frame is available to transmit. 423 */ 424 /* Check for ENDLESS_TX MDD event */ 425 MPASS(pidx < vsi->shared->isc_ntxd[0]); 426 wr32(vsi->hw, txr->tail, pidx); 427 } 428 429 430 /********************************************************************* 431 * 432 * (Re)Initialize a queue transmit ring by clearing its memory. 433 * 434 **********************************************************************/ 435 void 436 ixl_init_tx_ring(struct ixl_vsi *vsi, struct ixl_tx_queue *que) 437 { 438 struct tx_ring *txr = &que->txr; 439 440 /* Clear the old ring contents */ 441 bzero((void *)txr->tx_base, 442 (sizeof(struct i40e_tx_desc)) * 443 (vsi->shared->isc_ntxd[0] + (vsi->enable_head_writeback ? 1 : 0))); 444 445 wr32(vsi->hw, txr->tail, 0); 446 } 447 448 /* 449 * ixl_get_tx_head - Retrieve the value from the 450 * location the HW records its HEAD index 451 */ 452 static inline u32 453 ixl_get_tx_head(struct ixl_tx_queue *que) 454 { 455 if_softc_ctx_t scctx = que->vsi->shared; 456 struct tx_ring *txr = &que->txr; 457 void *head = &txr->tx_base[scctx->isc_ntxd[0]]; 458 459 return LE32_TO_CPU(*(volatile __le32 *)head); 460 } 461 462 static int 463 ixl_isc_txd_credits_update_hwb(void *arg, uint16_t qid, bool clear) 464 { 465 struct ixl_vsi *vsi = arg; 466 if_softc_ctx_t scctx = vsi->shared; 467 struct ixl_tx_queue *que = &vsi->tx_queues[qid]; 468 struct tx_ring *txr = &que->txr; 469 int head, credits; 470 471 /* Get the Head WB value */ 472 head = ixl_get_tx_head(que); 473 474 credits = head - txr->tx_cidx_processed; 475 if (credits < 0) 476 credits += scctx->isc_ntxd[0]; 477 if (clear) 478 txr->tx_cidx_processed = head; 479 480 return (credits); 481 } 482 483 static int 484 ixl_isc_txd_credits_update_dwb(void *arg, uint16_t txqid, bool clear) 485 { 486 struct ixl_vsi *vsi = arg; 487 struct ixl_tx_queue *tx_que = &vsi->tx_queues[txqid]; 488 if_softc_ctx_t scctx = vsi->shared; 489 struct tx_ring *txr = &tx_que->txr; 490 491 qidx_t processed = 0; 492 qidx_t cur, prev, ntxd, rs_cidx; 493 int32_t delta; 494 bool is_done; 495 496 rs_cidx = txr->tx_rs_cidx; 497 #if 0 498 device_printf(iflib_get_dev(vsi->ctx), "%s: (q%d) rs_cidx %d, txr->tx_rs_pidx %d\n", __func__, 499 txr->me, rs_cidx, txr->tx_rs_pidx); 500 #endif 501 if (rs_cidx == txr->tx_rs_pidx) 502 return (0); 503 cur = txr->tx_rsq[rs_cidx]; 504 MPASS(cur != QIDX_INVALID); 505 is_done = ixl_is_tx_desc_done(txr, cur); 506 507 if (!is_done) 508 return (0); 509 510 /* If clear is false just let caller know that there 511 * are descriptors to reclaim */ 512 if (!clear) 513 return (1); 514 515 prev = txr->tx_cidx_processed; 516 ntxd = scctx->isc_ntxd[0]; 517 do { 518 MPASS(prev != cur); 519 delta = (int32_t)cur - (int32_t)prev; 520 if (delta < 0) 521 delta += ntxd; 522 MPASS(delta > 0); 523 #if 0 524 device_printf(iflib_get_dev(vsi->ctx), 525 "%s: (q%d) cidx_processed=%u cur=%u clear=%d delta=%d\n", 526 __func__, txr->me, prev, cur, clear, delta); 527 #endif 528 processed += delta; 529 prev = cur; 530 rs_cidx = (rs_cidx + 1) & (ntxd-1); 531 if (rs_cidx == txr->tx_rs_pidx) 532 break; 533 cur = txr->tx_rsq[rs_cidx]; 534 MPASS(cur != QIDX_INVALID); 535 is_done = ixl_is_tx_desc_done(txr, cur); 536 } while (is_done); 537 538 txr->tx_rs_cidx = rs_cidx; 539 txr->tx_cidx_processed = prev; 540 541 #if 0 542 device_printf(iflib_get_dev(vsi->ctx), "%s: (q%d) processed %d\n", __func__, txr->me, processed); 543 #endif 544 return (processed); 545 } 546 547 static void 548 ixl_isc_rxd_refill(void *arg, if_rxd_update_t iru) 549 { 550 struct ixl_vsi *vsi = arg; 551 if_softc_ctx_t scctx = vsi->shared; 552 struct rx_ring *rxr = &((vsi->rx_queues[iru->iru_qsidx]).rxr); 553 uint64_t *paddrs; 554 uint32_t next_pidx, pidx; 555 uint16_t count; 556 int i; 557 558 paddrs = iru->iru_paddrs; 559 pidx = iru->iru_pidx; 560 count = iru->iru_count; 561 562 for (i = 0, next_pidx = pidx; i < count; i++) { 563 rxr->rx_base[next_pidx].read.pkt_addr = htole64(paddrs[i]); 564 if (++next_pidx == scctx->isc_nrxd[0]) 565 next_pidx = 0; 566 } 567 } 568 569 static void 570 ixl_isc_rxd_flush(void * arg, uint16_t rxqid, uint8_t flid __unused, qidx_t pidx) 571 { 572 struct ixl_vsi *vsi = arg; 573 struct rx_ring *rxr = &vsi->rx_queues[rxqid].rxr; 574 575 wr32(vsi->hw, rxr->tail, pidx); 576 } 577 578 static int 579 ixl_isc_rxd_available(void *arg, uint16_t rxqid, qidx_t idx, qidx_t budget) 580 { 581 struct ixl_vsi *vsi = arg; 582 struct rx_ring *rxr = &vsi->rx_queues[rxqid].rxr; 583 union i40e_rx_desc *rxd; 584 u64 qword; 585 uint32_t status; 586 int cnt, i, nrxd; 587 588 nrxd = vsi->shared->isc_nrxd[0]; 589 590 for (cnt = 0, i = idx; cnt < nrxd - 1 && cnt <= budget;) { 591 rxd = &rxr->rx_base[i]; 592 qword = le64toh(rxd->wb.qword1.status_error_len); 593 status = (qword & I40E_RXD_QW1_STATUS_MASK) 594 >> I40E_RXD_QW1_STATUS_SHIFT; 595 596 if ((status & (1 << I40E_RX_DESC_STATUS_DD_SHIFT)) == 0) 597 break; 598 if (++i == nrxd) 599 i = 0; 600 if (status & (1 << I40E_RX_DESC_STATUS_EOF_SHIFT)) 601 cnt++; 602 } 603 604 return (cnt); 605 } 606 607 /* 608 ** i40e_ptype_to_hash: parse the packet type 609 ** to determine the appropriate hash. 610 */ 611 static inline int 612 ixl_ptype_to_hash(u8 ptype) 613 { 614 struct i40e_rx_ptype_decoded decoded; 615 616 decoded = decode_rx_desc_ptype(ptype); 617 618 if (!decoded.known) 619 return M_HASHTYPE_OPAQUE; 620 621 if (decoded.outer_ip == I40E_RX_PTYPE_OUTER_L2) 622 return M_HASHTYPE_OPAQUE; 623 624 /* Note: anything that gets to this point is IP */ 625 if (decoded.outer_ip_ver == I40E_RX_PTYPE_OUTER_IPV6) { 626 switch (decoded.inner_prot) { 627 case I40E_RX_PTYPE_INNER_PROT_TCP: 628 return M_HASHTYPE_RSS_TCP_IPV6; 629 case I40E_RX_PTYPE_INNER_PROT_UDP: 630 return M_HASHTYPE_RSS_UDP_IPV6; 631 default: 632 return M_HASHTYPE_RSS_IPV6; 633 } 634 } 635 if (decoded.outer_ip_ver == I40E_RX_PTYPE_OUTER_IPV4) { 636 switch (decoded.inner_prot) { 637 case I40E_RX_PTYPE_INNER_PROT_TCP: 638 return M_HASHTYPE_RSS_TCP_IPV4; 639 case I40E_RX_PTYPE_INNER_PROT_UDP: 640 return M_HASHTYPE_RSS_UDP_IPV4; 641 default: 642 return M_HASHTYPE_RSS_IPV4; 643 } 644 } 645 /* We should never get here!! */ 646 return M_HASHTYPE_OPAQUE; 647 } 648 649 /********************************************************************* 650 * 651 * This routine executes in ithread context. It sends data which has been 652 * dma'ed into host memory to upper layer. 653 * 654 * Returns 0 upon success, errno on failure 655 * 656 *********************************************************************/ 657 static int 658 ixl_isc_rxd_pkt_get(void *arg, if_rxd_info_t ri) 659 { 660 struct ixl_vsi *vsi = arg; 661 if_softc_ctx_t scctx = vsi->shared; 662 struct ixl_rx_queue *que = &vsi->rx_queues[ri->iri_qsidx]; 663 struct rx_ring *rxr = &que->rxr; 664 union i40e_rx_desc *cur; 665 u32 status, error; 666 u16 plen; 667 u64 qword; 668 u8 ptype; 669 bool eop; 670 int i, cidx; 671 672 cidx = ri->iri_cidx; 673 i = 0; 674 do { 675 /* 5 descriptor receive limit */ 676 MPASS(i < IXL_MAX_RX_SEGS); 677 678 cur = &rxr->rx_base[cidx]; 679 qword = le64toh(cur->wb.qword1.status_error_len); 680 status = (qword & I40E_RXD_QW1_STATUS_MASK) 681 >> I40E_RXD_QW1_STATUS_SHIFT; 682 error = (qword & I40E_RXD_QW1_ERROR_MASK) 683 >> I40E_RXD_QW1_ERROR_SHIFT; 684 plen = (qword & I40E_RXD_QW1_LENGTH_PBUF_MASK) 685 >> I40E_RXD_QW1_LENGTH_PBUF_SHIFT; 686 ptype = (qword & I40E_RXD_QW1_PTYPE_MASK) 687 >> I40E_RXD_QW1_PTYPE_SHIFT; 688 689 /* we should never be called without a valid descriptor */ 690 MPASS((status & (1 << I40E_RX_DESC_STATUS_DD_SHIFT)) != 0); 691 692 ri->iri_len += plen; 693 rxr->rx_bytes += plen; 694 695 cur->wb.qword1.status_error_len = 0; 696 eop = (status & (1 << I40E_RX_DESC_STATUS_EOF_SHIFT)); 697 698 /* 699 ** Make sure bad packets are discarded, 700 ** note that only EOP descriptor has valid 701 ** error results. 702 */ 703 if (eop && (error & (1 << I40E_RX_DESC_ERROR_RXE_SHIFT))) { 704 rxr->desc_errs++; 705 return (EBADMSG); 706 } 707 ri->iri_frags[i].irf_flid = 0; 708 ri->iri_frags[i].irf_idx = cidx; 709 ri->iri_frags[i].irf_len = plen; 710 if (++cidx == vsi->shared->isc_nrxd[0]) 711 cidx = 0; 712 i++; 713 } while (!eop); 714 715 /* capture data for dynamic ITR adjustment */ 716 rxr->packets++; 717 rxr->rx_packets++; 718 719 if ((scctx->isc_capenable & IFCAP_RXCSUM) != 0) 720 rxr->csum_errs += ixl_rx_checksum(ri, status, error, ptype); 721 ri->iri_flowid = le32toh(cur->wb.qword0.hi_dword.rss); 722 ri->iri_rsstype = ixl_ptype_to_hash(ptype); 723 if (status & (1 << I40E_RX_DESC_STATUS_L2TAG1P_SHIFT)) { 724 ri->iri_vtag = le16toh(cur->wb.qword0.lo_dword.l2tag1); 725 ri->iri_flags |= M_VLANTAG; 726 } 727 ri->iri_nfrags = i; 728 return (0); 729 } 730 731 /********************************************************************* 732 * 733 * Verify that the hardware indicated that the checksum is valid. 734 * Inform the stack about the status of checksum so that stack 735 * doesn't spend time verifying the checksum. 736 * 737 *********************************************************************/ 738 static u8 739 ixl_rx_checksum(if_rxd_info_t ri, u32 status, u32 error, u8 ptype) 740 { 741 struct i40e_rx_ptype_decoded decoded; 742 743 ri->iri_csum_flags = 0; 744 745 /* No L3 or L4 checksum was calculated */ 746 if (!(status & (1 << I40E_RX_DESC_STATUS_L3L4P_SHIFT))) 747 return (0); 748 749 decoded = decode_rx_desc_ptype(ptype); 750 751 /* IPv6 with extension headers likely have bad csum */ 752 if (decoded.outer_ip == I40E_RX_PTYPE_OUTER_IP && 753 decoded.outer_ip_ver == I40E_RX_PTYPE_OUTER_IPV6) { 754 if (status & 755 (1 << I40E_RX_DESC_STATUS_IPV6EXADD_SHIFT)) { 756 ri->iri_csum_flags = 0; 757 return (1); 758 } 759 } 760 761 ri->iri_csum_flags |= CSUM_L3_CALC; 762 763 /* IPv4 checksum error */ 764 if (error & (1 << I40E_RX_DESC_ERROR_IPE_SHIFT)) 765 return (1); 766 767 ri->iri_csum_flags |= CSUM_L3_VALID; 768 ri->iri_csum_flags |= CSUM_L4_CALC; 769 770 /* L4 checksum error */ 771 if (error & (1 << I40E_RX_DESC_ERROR_L4E_SHIFT)) 772 return (1); 773 774 ri->iri_csum_flags |= CSUM_L4_VALID; 775 ri->iri_csum_data |= htons(0xffff); 776 777 return (0); 778 } 779 780 /* Set Report Status queue fields to 0 */ 781 void 782 ixl_init_tx_rsqs(struct ixl_vsi *vsi) 783 { 784 if_softc_ctx_t scctx = vsi->shared; 785 struct ixl_tx_queue *tx_que; 786 int i, j; 787 788 for (i = 0, tx_que = vsi->tx_queues; i < vsi->num_tx_queues; i++, tx_que++) { 789 struct tx_ring *txr = &tx_que->txr; 790 791 txr->tx_rs_cidx = txr->tx_rs_pidx; 792 793 /* Initialize the last processed descriptor to be the end of 794 * the ring, rather than the start, so that we avoid an 795 * off-by-one error when calculating how many descriptors are 796 * done in the credits_update function. 797 */ 798 txr->tx_cidx_processed = scctx->isc_ntxd[0] - 1; 799 800 for (j = 0; j < scctx->isc_ntxd[0]; j++) 801 txr->tx_rsq[j] = QIDX_INVALID; 802 } 803 } 804 805 void 806 ixl_init_tx_cidx(struct ixl_vsi *vsi) 807 { 808 if_softc_ctx_t scctx = vsi->shared; 809 struct ixl_tx_queue *tx_que; 810 int i; 811 812 for (i = 0, tx_que = vsi->tx_queues; i < vsi->num_tx_queues; i++, tx_que++) { 813 struct tx_ring *txr = &tx_que->txr; 814 815 txr->tx_cidx_processed = scctx->isc_ntxd[0] - 1; 816 } 817 } 818 819 /* 820 * Input: bitmap of enum virtchnl_link_speed 821 */ 822 u64 823 ixl_max_vc_speed_to_value(u8 link_speeds) 824 { 825 if (link_speeds & VIRTCHNL_LINK_SPEED_40GB) 826 return IF_Gbps(40); 827 if (link_speeds & VIRTCHNL_LINK_SPEED_25GB) 828 return IF_Gbps(25); 829 if (link_speeds & VIRTCHNL_LINK_SPEED_20GB) 830 return IF_Gbps(20); 831 if (link_speeds & VIRTCHNL_LINK_SPEED_10GB) 832 return IF_Gbps(10); 833 if (link_speeds & VIRTCHNL_LINK_SPEED_1GB) 834 return IF_Gbps(1); 835 if (link_speeds & VIRTCHNL_LINK_SPEED_100MB) 836 return IF_Mbps(100); 837 else 838 /* Minimum supported link speed */ 839 return IF_Mbps(100); 840 } 841 842 void 843 ixl_add_vsi_sysctls(device_t dev, struct ixl_vsi *vsi, 844 struct sysctl_ctx_list *ctx, const char *sysctl_name) 845 { 846 struct sysctl_oid *tree; 847 struct sysctl_oid_list *child; 848 struct sysctl_oid_list *vsi_list; 849 850 tree = device_get_sysctl_tree(dev); 851 child = SYSCTL_CHILDREN(tree); 852 vsi->vsi_node = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, sysctl_name, 853 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "VSI Number"); 854 vsi_list = SYSCTL_CHILDREN(vsi->vsi_node); 855 856 ixl_add_sysctls_eth_stats(ctx, vsi_list, &vsi->eth_stats); 857 } 858 859 void 860 ixl_add_sysctls_eth_stats(struct sysctl_ctx_list *ctx, 861 struct sysctl_oid_list *child, 862 struct i40e_eth_stats *eth_stats) 863 { 864 struct ixl_sysctl_info ctls[] = 865 { 866 {ð_stats->rx_bytes, "good_octets_rcvd", "Good Octets Received"}, 867 {ð_stats->rx_unicast, "ucast_pkts_rcvd", 868 "Unicast Packets Received"}, 869 {ð_stats->rx_multicast, "mcast_pkts_rcvd", 870 "Multicast Packets Received"}, 871 {ð_stats->rx_broadcast, "bcast_pkts_rcvd", 872 "Broadcast Packets Received"}, 873 {ð_stats->rx_discards, "rx_discards", "Discarded RX packets"}, 874 {ð_stats->tx_bytes, "good_octets_txd", "Good Octets Transmitted"}, 875 {ð_stats->tx_unicast, "ucast_pkts_txd", "Unicast Packets Transmitted"}, 876 {ð_stats->tx_multicast, "mcast_pkts_txd", 877 "Multicast Packets Transmitted"}, 878 {ð_stats->tx_broadcast, "bcast_pkts_txd", 879 "Broadcast Packets Transmitted"}, 880 // end 881 {0,0,0} 882 }; 883 884 struct ixl_sysctl_info *entry = ctls; 885 while (entry->stat != 0) 886 { 887 SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, entry->name, 888 CTLFLAG_RD, entry->stat, 889 entry->description); 890 entry++; 891 } 892 } 893 894 void 895 ixl_vsi_add_queues_stats(struct ixl_vsi *vsi, struct sysctl_ctx_list *ctx) 896 { 897 struct sysctl_oid_list *vsi_list, *queue_list; 898 struct sysctl_oid *queue_node; 899 char queue_namebuf[IXL_QUEUE_NAME_LEN]; 900 901 struct ixl_rx_queue *rx_que; 902 struct ixl_tx_queue *tx_que; 903 struct tx_ring *txr; 904 struct rx_ring *rxr; 905 906 vsi_list = SYSCTL_CHILDREN(vsi->vsi_node); 907 908 /* Queue statistics */ 909 for (int q = 0; q < vsi->num_rx_queues; q++) { 910 bzero(queue_namebuf, sizeof(queue_namebuf)); 911 snprintf(queue_namebuf, sizeof(queue_namebuf), "rxq%02d", q); 912 queue_node = SYSCTL_ADD_NODE(ctx, vsi_list, 913 OID_AUTO, queue_namebuf, CTLFLAG_RD | CTLFLAG_MPSAFE, 914 NULL, "RX Queue #"); 915 queue_list = SYSCTL_CHILDREN(queue_node); 916 917 rx_que = &(vsi->rx_queues[q]); 918 rxr = &(rx_que->rxr); 919 920 SYSCTL_ADD_UQUAD(ctx, queue_list, OID_AUTO, "irqs", 921 CTLFLAG_RD, &(rx_que->irqs), 922 "irqs on this queue (both Tx and Rx)"); 923 924 SYSCTL_ADD_UQUAD(ctx, queue_list, OID_AUTO, "packets", 925 CTLFLAG_RD, &(rxr->rx_packets), 926 "Queue Packets Received"); 927 SYSCTL_ADD_UQUAD(ctx, queue_list, OID_AUTO, "bytes", 928 CTLFLAG_RD, &(rxr->rx_bytes), 929 "Queue Bytes Received"); 930 SYSCTL_ADD_UQUAD(ctx, queue_list, OID_AUTO, "desc_err", 931 CTLFLAG_RD, &(rxr->desc_errs), 932 "Queue Rx Descriptor Errors"); 933 SYSCTL_ADD_UINT(ctx, queue_list, OID_AUTO, "itr", 934 CTLFLAG_RD, &(rxr->itr), 0, 935 "Queue Rx ITR Interval"); 936 } 937 for (int q = 0; q < vsi->num_tx_queues; q++) { 938 bzero(queue_namebuf, sizeof(queue_namebuf)); 939 snprintf(queue_namebuf, sizeof(queue_namebuf), "txq%02d", q); 940 queue_node = SYSCTL_ADD_NODE(ctx, vsi_list, 941 OID_AUTO, queue_namebuf, CTLFLAG_RD | CTLFLAG_MPSAFE, 942 NULL, "TX Queue #"); 943 queue_list = SYSCTL_CHILDREN(queue_node); 944 945 tx_que = &(vsi->tx_queues[q]); 946 txr = &(tx_que->txr); 947 948 SYSCTL_ADD_UQUAD(ctx, queue_list, OID_AUTO, "tso", 949 CTLFLAG_RD, &(tx_que->tso), 950 "TSO"); 951 SYSCTL_ADD_UQUAD(ctx, queue_list, OID_AUTO, "mss_too_small", 952 CTLFLAG_RD, &(txr->mss_too_small), 953 "TSO sends with an MSS less than 64"); 954 SYSCTL_ADD_UQUAD(ctx, queue_list, OID_AUTO, "packets", 955 CTLFLAG_RD, &(txr->tx_packets), 956 "Queue Packets Transmitted"); 957 SYSCTL_ADD_UQUAD(ctx, queue_list, OID_AUTO, "bytes", 958 CTLFLAG_RD, &(txr->tx_bytes), 959 "Queue Bytes Transmitted"); 960 SYSCTL_ADD_UINT(ctx, queue_list, OID_AUTO, "itr", 961 CTLFLAG_RD, &(txr->itr), 0, 962 "Queue Tx ITR Interval"); 963 } 964 }
Cache object: c254f0baaf3d20967602b3b9cf54624c
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