1/* 2 * Copyright (C) 2015 Cavium Inc. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: stable/11/sys/dev/vnic/nicvf_queues.c 326788 2017-12-12 01:20:45Z emaste $ 27 * 28 */ 29#include <sys/cdefs.h> 30__FBSDID("$FreeBSD: stable/11/sys/dev/vnic/nicvf_queues.c 326788 2017-12-12 01:20:45Z emaste $"); 31 32#include "opt_inet.h" 33#include "opt_inet6.h" 34 35#include <sys/param.h> 36#include <sys/systm.h> 37#include <sys/bitset.h> 38#include <sys/bitstring.h> 39#include <sys/buf_ring.h> 40#include <sys/bus.h> 41#include <sys/endian.h> 42#include <sys/kernel.h> 43#include <sys/malloc.h> 44#include <sys/module.h> 45#include <sys/rman.h> 46#include <sys/pciio.h> 47#include <sys/pcpu.h> 48#include <sys/proc.h> 49#include <sys/sockio.h> 50#include <sys/socket.h> 51#include <sys/stdatomic.h> 52#include <sys/cpuset.h> 53#include <sys/lock.h> 54#include <sys/mutex.h> 55#include <sys/smp.h> 56#include <sys/taskqueue.h> 57 58#include <vm/vm.h> 59#include <vm/pmap.h> 60 61#include <machine/bus.h> 62#include <machine/vmparam.h> 63 64#include <net/if.h> 65#include <net/if_var.h> 66#include <net/if_media.h> 67#include <net/ifq.h> 68#include <net/bpf.h> 69#include <net/ethernet.h> 70 71#include <netinet/in_systm.h> 72#include <netinet/in.h> 73#include <netinet/if_ether.h> 74#include <netinet/ip.h> 75#include <netinet/ip6.h> 76#include <netinet/sctp.h> 77#include <netinet/tcp.h> 78#include <netinet/tcp_lro.h> 79#include <netinet/udp.h> 80 81#include <netinet6/ip6_var.h> 82 83#include <dev/pci/pcireg.h> 84#include <dev/pci/pcivar.h> 85 86#include "thunder_bgx.h" 87#include "nic_reg.h" 88#include "nic.h" 89#include "q_struct.h" 90#include "nicvf_queues.h" 91 92#define DEBUG 93#undef DEBUG 94 95#ifdef DEBUG 96#define dprintf(dev, fmt, ...) device_printf(dev, fmt, ##__VA_ARGS__) 97#else 98#define dprintf(dev, fmt, ...) 99#endif 100 101MALLOC_DECLARE(M_NICVF); 102 103static void nicvf_free_snd_queue(struct nicvf *, struct snd_queue *); 104static struct mbuf * nicvf_get_rcv_mbuf(struct nicvf *, struct cqe_rx_t *); 105static void nicvf_sq_disable(struct nicvf *, int); 106static void nicvf_sq_enable(struct nicvf *, struct snd_queue *, int); 107static void nicvf_put_sq_desc(struct snd_queue *, int); 108static void nicvf_cmp_queue_config(struct nicvf *, struct queue_set *, int, 109 boolean_t); 110static void nicvf_sq_free_used_descs(struct nicvf *, struct snd_queue *, int); 111 112static int nicvf_tx_mbuf_locked(struct snd_queue *, struct mbuf **); 113 114static void nicvf_rbdr_task(void *, int); 115static void nicvf_rbdr_task_nowait(void *, int); 116 117struct rbuf_info { 118 bus_dma_tag_t dmat; 119 bus_dmamap_t dmap; 120 struct mbuf * mbuf; 121}; 122 123#define GET_RBUF_INFO(x) ((struct rbuf_info *)((x) - NICVF_RCV_BUF_ALIGN_BYTES)) 124 125/* Poll a register for a specific value */ 126static int nicvf_poll_reg(struct nicvf *nic, int qidx, 127 uint64_t reg, int bit_pos, int bits, int val) 128{ 129 uint64_t bit_mask; 130 uint64_t reg_val; 131 int timeout = 10; 132 133 bit_mask = (1UL << bits) - 1; 134 bit_mask = (bit_mask << bit_pos); 135 136 while (timeout) { 137 reg_val = nicvf_queue_reg_read(nic, reg, qidx); 138 if (((reg_val & bit_mask) >> bit_pos) == val) 139 return (0); 140 141 DELAY(1000); 142 timeout--; 143 } 144 device_printf(nic->dev, "Poll on reg 0x%lx failed\n", reg); 145 return (ETIMEDOUT); 146} 147 148/* Callback for bus_dmamap_load() */ 149static void 150nicvf_dmamap_q_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error) 151{ 152 bus_addr_t *paddr; 153 154 KASSERT(nseg == 1, ("wrong number of segments, should be 1")); 155 paddr = arg; 156 *paddr = segs->ds_addr; 157} 158 159/* Allocate memory for a queue's descriptors */ 160static int 161nicvf_alloc_q_desc_mem(struct nicvf *nic, struct q_desc_mem *dmem, 162 int q_len, int desc_size, int align_bytes) 163{ 164 int err, err_dmat; 165 166 /* Create DMA tag first */ 167 err = bus_dma_tag_create( 168 bus_get_dma_tag(nic->dev), /* parent tag */ 169 align_bytes, /* alignment */ 170 0, /* boundary */ 171 BUS_SPACE_MAXADDR, /* lowaddr */ 172 BUS_SPACE_MAXADDR, /* highaddr */ 173 NULL, NULL, /* filtfunc, filtfuncarg */ 174 (q_len * desc_size), /* maxsize */ 175 1, /* nsegments */ 176 (q_len * desc_size), /* maxsegsize */ 177 0, /* flags */ 178 NULL, NULL, /* lockfunc, lockfuncarg */ 179 &dmem->dmat); /* dmat */ 180 181 if (err != 0) { 182 device_printf(nic->dev, 183 "Failed to create busdma tag for descriptors ring\n"); 184 return (err); 185 } 186 187 /* Allocate segment of continuous DMA safe memory */ 188 err = bus_dmamem_alloc( 189 dmem->dmat, /* DMA tag */ 190 &dmem->base, /* virtual address */ 191 (BUS_DMA_NOWAIT | BUS_DMA_ZERO), /* flags */ 192 &dmem->dmap); /* DMA map */ 193 if (err != 0) { 194 device_printf(nic->dev, "Failed to allocate DMA safe memory for" 195 "descriptors ring\n"); 196 goto dmamem_fail; 197 } 198 199 err = bus_dmamap_load( 200 dmem->dmat, 201 dmem->dmap, 202 dmem->base, 203 (q_len * desc_size), /* allocation size */ 204 nicvf_dmamap_q_cb, /* map to DMA address cb. */ 205 &dmem->phys_base, /* physical address */ 206 BUS_DMA_NOWAIT); 207 if (err != 0) { 208 device_printf(nic->dev, 209 "Cannot load DMA map of descriptors ring\n"); 210 goto dmamap_fail; 211 } 212 213 dmem->q_len = q_len; 214 dmem->size = (desc_size * q_len); 215 216 return (0); 217 218dmamap_fail: 219 bus_dmamem_free(dmem->dmat, dmem->base, dmem->dmap); 220 dmem->phys_base = 0; 221dmamem_fail: 222 err_dmat = bus_dma_tag_destroy(dmem->dmat); 223 dmem->base = NULL; 224 KASSERT(err_dmat == 0, 225 ("%s: Trying to destroy BUSY DMA tag", __func__)); 226 227 return (err); 228} 229 230/* Free queue's descriptor memory */ 231static void 232nicvf_free_q_desc_mem(struct nicvf *nic, struct q_desc_mem *dmem) 233{ 234 int err; 235 236 if ((dmem == NULL) || (dmem->base == NULL)) 237 return; 238 239 /* Unload a map */ 240 bus_dmamap_sync(dmem->dmat, dmem->dmap, BUS_DMASYNC_POSTREAD); 241 bus_dmamap_unload(dmem->dmat, dmem->dmap); 242 /* Free DMA memory */ 243 bus_dmamem_free(dmem->dmat, dmem->base, dmem->dmap); 244 /* Destroy DMA tag */ 245 err = bus_dma_tag_destroy(dmem->dmat); 246 247 KASSERT(err == 0, 248 ("%s: Trying to destroy BUSY DMA tag", __func__)); 249 250 dmem->phys_base = 0; 251 dmem->base = NULL; 252} 253 254/* 255 * Allocate buffer for packet reception 256 * HW returns memory address where packet is DMA'ed but not a pointer 257 * into RBDR ring, so save buffer address at the start of fragment and 258 * align the start address to a cache aligned address 259 */ 260static __inline int 261nicvf_alloc_rcv_buffer(struct nicvf *nic, struct rbdr *rbdr, 262 bus_dmamap_t dmap, int mflags, uint32_t buf_len, bus_addr_t *rbuf) 263{ 264 struct mbuf *mbuf; 265 struct rbuf_info *rinfo; 266 bus_dma_segment_t segs[1]; 267 int nsegs; 268 int err; 269 270 mbuf = m_getjcl(mflags, MT_DATA, M_PKTHDR, MCLBYTES); 271 if (mbuf == NULL) 272 return (ENOMEM); 273 274 /* 275 * The length is equal to the actual length + one 128b line 276 * used as a room for rbuf_info structure. 277 */ 278 mbuf->m_len = mbuf->m_pkthdr.len = buf_len; 279 280 err = bus_dmamap_load_mbuf_sg(rbdr->rbdr_buff_dmat, dmap, mbuf, segs, 281 &nsegs, BUS_DMA_NOWAIT); 282 if (err != 0) { 283 device_printf(nic->dev, 284 "Failed to map mbuf into DMA visible memory, err: %d\n", 285 err); 286 m_freem(mbuf); 287 bus_dmamap_destroy(rbdr->rbdr_buff_dmat, dmap); 288 return (err); 289 } 290 if (nsegs != 1) 291 panic("Unexpected number of DMA segments for RB: %d", nsegs); 292 /* 293 * Now use the room for rbuf_info structure 294 * and adjust mbuf data and length. 295 */ 296 rinfo = (struct rbuf_info *)mbuf->m_data; 297 m_adj(mbuf, NICVF_RCV_BUF_ALIGN_BYTES); 298 299 rinfo->dmat = rbdr->rbdr_buff_dmat; 300 rinfo->dmap = dmap; 301 rinfo->mbuf = mbuf; 302 303 *rbuf = segs[0].ds_addr + NICVF_RCV_BUF_ALIGN_BYTES; 304 305 return (0); 306} 307 308/* Retrieve mbuf for received packet */ 309static struct mbuf * 310nicvf_rb_ptr_to_mbuf(struct nicvf *nic, bus_addr_t rb_ptr) 311{ 312 struct mbuf *mbuf; 313 struct rbuf_info *rinfo; 314 315 /* Get buffer start address and alignment offset */ 316 rinfo = GET_RBUF_INFO(PHYS_TO_DMAP(rb_ptr)); 317 318 /* Now retrieve mbuf to give to stack */ 319 mbuf = rinfo->mbuf; 320 if (__predict_false(mbuf == NULL)) { 321 panic("%s: Received packet fragment with NULL mbuf", 322 device_get_nameunit(nic->dev)); 323 } 324 /* 325 * Clear the mbuf in the descriptor to indicate 326 * that this slot is processed and free to use. 327 */ 328 rinfo->mbuf = NULL; 329 330 bus_dmamap_sync(rinfo->dmat, rinfo->dmap, BUS_DMASYNC_POSTREAD); 331 bus_dmamap_unload(rinfo->dmat, rinfo->dmap); 332 333 return (mbuf); 334} 335 336/* Allocate RBDR ring and populate receive buffers */ 337static int 338nicvf_init_rbdr(struct nicvf *nic, struct rbdr *rbdr, int ring_len, 339 int buf_size, int qidx) 340{ 341 bus_dmamap_t dmap; 342 bus_addr_t rbuf; 343 struct rbdr_entry_t *desc; 344 int idx; 345 int err; 346 347 /* Allocate rbdr descriptors ring */ 348 err = nicvf_alloc_q_desc_mem(nic, &rbdr->dmem, ring_len, 349 sizeof(struct rbdr_entry_t), NICVF_RCV_BUF_ALIGN_BYTES); 350 if (err != 0) { 351 device_printf(nic->dev, 352 "Failed to create RBDR descriptors ring\n"); 353 return (err); 354 } 355 356 rbdr->desc = rbdr->dmem.base; 357 /* 358 * Buffer size has to be in multiples of 128 bytes. 359 * Make room for metadata of size of one line (128 bytes). 360 */ 361 rbdr->dma_size = buf_size - NICVF_RCV_BUF_ALIGN_BYTES; 362 rbdr->enable = TRUE; 363 rbdr->thresh = RBDR_THRESH; 364 rbdr->nic = nic; 365 rbdr->idx = qidx; 366 367 /* 368 * Create DMA tag for Rx buffers. 369 * Each map created using this tag is intended to store Rx payload for 370 * one fragment and one header structure containing rbuf_info (thus 371 * additional 128 byte line since RB must be a multiple of 128 byte 372 * cache line). 373 */ 374 if (buf_size > MCLBYTES) { 375 device_printf(nic->dev, 376 "Buffer size to large for mbuf cluster\n"); 377 return (EINVAL); 378 } 379 err = bus_dma_tag_create( 380 bus_get_dma_tag(nic->dev), /* parent tag */ 381 NICVF_RCV_BUF_ALIGN_BYTES, /* alignment */ 382 0, /* boundary */ 383 DMAP_MAX_PHYSADDR, /* lowaddr */ 384 DMAP_MIN_PHYSADDR, /* highaddr */ 385 NULL, NULL, /* filtfunc, filtfuncarg */ 386 roundup2(buf_size, MCLBYTES), /* maxsize */ 387 1, /* nsegments */ 388 roundup2(buf_size, MCLBYTES), /* maxsegsize */ 389 0, /* flags */ 390 NULL, NULL, /* lockfunc, lockfuncarg */ 391 &rbdr->rbdr_buff_dmat); /* dmat */ 392 393 if (err != 0) { 394 device_printf(nic->dev, 395 "Failed to create busdma tag for RBDR buffers\n"); 396 return (err); 397 } 398 399 rbdr->rbdr_buff_dmaps = malloc(sizeof(*rbdr->rbdr_buff_dmaps) * 400 ring_len, M_NICVF, (M_WAITOK | M_ZERO)); 401 402 for (idx = 0; idx < ring_len; idx++) { 403 err = bus_dmamap_create(rbdr->rbdr_buff_dmat, 0, &dmap); 404 if (err != 0) { 405 device_printf(nic->dev, 406 "Failed to create DMA map for RB\n"); 407 return (err); 408 } 409 rbdr->rbdr_buff_dmaps[idx] = dmap; 410 411 err = nicvf_alloc_rcv_buffer(nic, rbdr, dmap, M_WAITOK, 412 DMA_BUFFER_LEN, &rbuf); 413 if (err != 0) 414 return (err); 415 416 desc = GET_RBDR_DESC(rbdr, idx); 417 desc->buf_addr = (rbuf >> NICVF_RCV_BUF_ALIGN); 418 } 419 420 /* Allocate taskqueue */ 421 TASK_INIT(&rbdr->rbdr_task, 0, nicvf_rbdr_task, rbdr); 422 TASK_INIT(&rbdr->rbdr_task_nowait, 0, nicvf_rbdr_task_nowait, rbdr); 423 rbdr->rbdr_taskq = taskqueue_create_fast("nicvf_rbdr_taskq", M_WAITOK, 424 taskqueue_thread_enqueue, &rbdr->rbdr_taskq); 425 taskqueue_start_threads(&rbdr->rbdr_taskq, 1, PI_NET, "%s: rbdr_taskq", 426 device_get_nameunit(nic->dev)); 427 428 return (0); 429} 430 431/* Free RBDR ring and its receive buffers */ 432static void 433nicvf_free_rbdr(struct nicvf *nic, struct rbdr *rbdr) 434{ 435 struct mbuf *mbuf; 436 struct queue_set *qs; 437 struct rbdr_entry_t *desc; 438 struct rbuf_info *rinfo; 439 bus_addr_t buf_addr; 440 int head, tail, idx; 441 int err; 442 443 qs = nic->qs; 444 445 if ((qs == NULL) || (rbdr == NULL)) 446 return; 447 448 rbdr->enable = FALSE; 449 if (rbdr->rbdr_taskq != NULL) { 450 /* Remove tasks */ 451 while (taskqueue_cancel(rbdr->rbdr_taskq, 452 &rbdr->rbdr_task_nowait, NULL) != 0) { 453 /* Finish the nowait task first */ 454 taskqueue_drain(rbdr->rbdr_taskq, 455 &rbdr->rbdr_task_nowait); 456 } 457 taskqueue_free(rbdr->rbdr_taskq); 458 rbdr->rbdr_taskq = NULL; 459 460 while (taskqueue_cancel(taskqueue_thread, 461 &rbdr->rbdr_task, NULL) != 0) { 462 /* Now finish the sleepable task */ 463 taskqueue_drain(taskqueue_thread, &rbdr->rbdr_task); 464 } 465 } 466 467 /* 468 * Free all of the memory under the RB descriptors. 469 * There are assumptions here: 470 * 1. Corresponding RBDR is disabled 471 * - it is safe to operate using head and tail indexes 472 * 2. All bffers that were received are properly freed by 473 * the receive handler 474 * - there is no need to unload DMA map and free MBUF for other 475 * descriptors than unused ones 476 */ 477 if (rbdr->rbdr_buff_dmat != NULL) { 478 head = rbdr->head; 479 tail = rbdr->tail; 480 while (head != tail) { 481 desc = GET_RBDR_DESC(rbdr, head); 482 buf_addr = desc->buf_addr << NICVF_RCV_BUF_ALIGN; 483 rinfo = GET_RBUF_INFO(PHYS_TO_DMAP(buf_addr)); 484 bus_dmamap_unload(rbdr->rbdr_buff_dmat, rinfo->dmap); 485 mbuf = rinfo->mbuf; 486 /* This will destroy everything including rinfo! */ 487 m_freem(mbuf); 488 head++; 489 head &= (rbdr->dmem.q_len - 1); 490 } 491 /* Free tail descriptor */ 492 desc = GET_RBDR_DESC(rbdr, tail); 493 buf_addr = desc->buf_addr << NICVF_RCV_BUF_ALIGN; 494 rinfo = GET_RBUF_INFO(PHYS_TO_DMAP(buf_addr)); 495 bus_dmamap_unload(rbdr->rbdr_buff_dmat, rinfo->dmap); 496 mbuf = rinfo->mbuf; 497 /* This will destroy everything including rinfo! */ 498 m_freem(mbuf); 499 500 /* Destroy DMA maps */ 501 for (idx = 0; idx < qs->rbdr_len; idx++) { 502 if (rbdr->rbdr_buff_dmaps[idx] == NULL) 503 continue; 504 err = bus_dmamap_destroy(rbdr->rbdr_buff_dmat, 505 rbdr->rbdr_buff_dmaps[idx]); 506 KASSERT(err == 0, 507 ("%s: Could not destroy DMA map for RB, desc: %d", 508 __func__, idx)); 509 rbdr->rbdr_buff_dmaps[idx] = NULL; 510 } 511 512 /* Now destroy the tag */ 513 err = bus_dma_tag_destroy(rbdr->rbdr_buff_dmat); 514 KASSERT(err == 0, 515 ("%s: Trying to destroy BUSY DMA tag", __func__)); 516 517 rbdr->head = 0; 518 rbdr->tail = 0; 519 } 520 521 /* Free RBDR ring */ 522 nicvf_free_q_desc_mem(nic, &rbdr->dmem); 523} 524 525/* 526 * Refill receive buffer descriptors with new buffers. 527 */ 528static int 529nicvf_refill_rbdr(struct rbdr *rbdr, int mflags) 530{ 531 struct nicvf *nic; 532 struct queue_set *qs; 533 int rbdr_idx; 534 int tail, qcount; 535 int refill_rb_cnt; 536 struct rbdr_entry_t *desc; 537 bus_dmamap_t dmap; 538 bus_addr_t rbuf; 539 boolean_t rb_alloc_fail; 540 int new_rb; 541 542 rb_alloc_fail = TRUE; 543 new_rb = 0; 544 nic = rbdr->nic; 545 qs = nic->qs; 546 rbdr_idx = rbdr->idx; 547 548 /* Check if it's enabled */ 549 if (!rbdr->enable) 550 return (0); 551 552 /* Get no of desc's to be refilled */ 553 qcount = nicvf_queue_reg_read(nic, NIC_QSET_RBDR_0_1_STATUS0, rbdr_idx); 554 qcount &= 0x7FFFF; 555 /* Doorbell can be ringed with a max of ring size minus 1 */ 556 if (qcount >= (qs->rbdr_len - 1)) { 557 rb_alloc_fail = FALSE; 558 goto out; 559 } else 560 refill_rb_cnt = qs->rbdr_len - qcount - 1; 561 562 /* Start filling descs from tail */ 563 tail = nicvf_queue_reg_read(nic, NIC_QSET_RBDR_0_1_TAIL, rbdr_idx) >> 3; 564 while (refill_rb_cnt) { 565 tail++; 566 tail &= (rbdr->dmem.q_len - 1); 567 568 dmap = rbdr->rbdr_buff_dmaps[tail]; 569 if (nicvf_alloc_rcv_buffer(nic, rbdr, dmap, mflags, 570 DMA_BUFFER_LEN, &rbuf)) { 571 /* Something went wrong. Resign */ 572 break; 573 } 574 desc = GET_RBDR_DESC(rbdr, tail); 575 desc->buf_addr = (rbuf >> NICVF_RCV_BUF_ALIGN); 576 refill_rb_cnt--; 577 new_rb++; 578 } 579 580 /* make sure all memory stores are done before ringing doorbell */ 581 wmb(); 582 583 /* Check if buffer allocation failed */ 584 if (refill_rb_cnt == 0) 585 rb_alloc_fail = FALSE; 586 587 /* Notify HW */ 588 nicvf_queue_reg_write(nic, NIC_QSET_RBDR_0_1_DOOR, 589 rbdr_idx, new_rb); 590out: 591 if (!rb_alloc_fail) { 592 /* 593 * Re-enable RBDR interrupts only 594 * if buffer allocation is success. 595 */ 596 nicvf_enable_intr(nic, NICVF_INTR_RBDR, rbdr_idx); 597 598 return (0); 599 } 600 601 return (ENOMEM); 602} 603 604/* Refill RBs even if sleep is needed to reclaim memory */ 605static void 606nicvf_rbdr_task(void *arg, int pending) 607{ 608 struct rbdr *rbdr; 609 int err; 610 611 rbdr = (struct rbdr *)arg; 612 613 err = nicvf_refill_rbdr(rbdr, M_WAITOK); 614 if (__predict_false(err != 0)) { 615 panic("%s: Failed to refill RBs even when sleep enabled", 616 __func__); 617 } 618} 619 620/* Refill RBs as soon as possible without waiting */ 621static void 622nicvf_rbdr_task_nowait(void *arg, int pending) 623{ 624 struct rbdr *rbdr; 625 int err; 626 627 rbdr = (struct rbdr *)arg; 628 629 err = nicvf_refill_rbdr(rbdr, M_NOWAIT); 630 if (err != 0) { 631 /* 632 * Schedule another, sleepable kernel thread 633 * that will for sure refill the buffers. 634 */ 635 taskqueue_enqueue(taskqueue_thread, &rbdr->rbdr_task); 636 } 637} 638 639static int 640nicvf_rcv_pkt_handler(struct nicvf *nic, struct cmp_queue *cq, 641 struct cqe_rx_t *cqe_rx, int cqe_type) 642{ 643 struct mbuf *mbuf; 644 struct rcv_queue *rq; 645 int rq_idx; 646 int err = 0; 647 648 rq_idx = cqe_rx->rq_idx; 649 rq = &nic->qs->rq[rq_idx]; 650 651 /* Check for errors */ 652 err = nicvf_check_cqe_rx_errs(nic, cq, cqe_rx); 653 if (err && !cqe_rx->rb_cnt) 654 return (0); 655 656 mbuf = nicvf_get_rcv_mbuf(nic, cqe_rx); 657 if (mbuf == NULL) { 658 dprintf(nic->dev, "Packet not received\n"); 659 return (0); 660 } 661 662 /* If error packet */ 663 if (err != 0) { 664 m_freem(mbuf); 665 return (0); 666 } 667 668 if (rq->lro_enabled && 669 ((cqe_rx->l3_type == L3TYPE_IPV4) && (cqe_rx->l4_type == L4TYPE_TCP)) && 670 (mbuf->m_pkthdr.csum_flags & (CSUM_DATA_VALID | CSUM_PSEUDO_HDR)) == 671 (CSUM_DATA_VALID | CSUM_PSEUDO_HDR)) { 672 /* 673 * At this point it is known that there are no errors in the 674 * packet. Attempt to LRO enqueue. Send to stack if no resources 675 * or enqueue error. 676 */ 677 if ((rq->lro.lro_cnt != 0) && 678 (tcp_lro_rx(&rq->lro, mbuf, 0) == 0)) 679 return (0); 680 } 681 /* 682 * Push this packet to the stack later to avoid 683 * unlocking completion task in the middle of work. 684 */ 685 err = buf_ring_enqueue(cq->rx_br, mbuf); 686 if (err != 0) { 687 /* 688 * Failed to enqueue this mbuf. 689 * We don't drop it, just schedule another task. 690 */ 691 return (err); 692 } 693 694 return (0); 695} 696 697static void 698nicvf_snd_pkt_handler(struct nicvf *nic, struct cmp_queue *cq, 699 struct cqe_send_t *cqe_tx, int cqe_type) 700{ 701 bus_dmamap_t dmap; 702 struct mbuf *mbuf; 703 struct snd_queue *sq; 704 struct sq_hdr_subdesc *hdr; 705 706 mbuf = NULL; 707 sq = &nic->qs->sq[cqe_tx->sq_idx]; 708 709 hdr = (struct sq_hdr_subdesc *)GET_SQ_DESC(sq, cqe_tx->sqe_ptr); 710 if (hdr->subdesc_type != SQ_DESC_TYPE_HEADER) 711 return; 712 713 dprintf(nic->dev, 714 "%s Qset #%d SQ #%d SQ ptr #%d subdesc count %d\n", 715 __func__, cqe_tx->sq_qs, cqe_tx->sq_idx, 716 cqe_tx->sqe_ptr, hdr->subdesc_cnt); 717 718 dmap = (bus_dmamap_t)sq->snd_buff[cqe_tx->sqe_ptr].dmap; 719 bus_dmamap_unload(sq->snd_buff_dmat, dmap); 720 721 mbuf = (struct mbuf *)sq->snd_buff[cqe_tx->sqe_ptr].mbuf; 722 if (mbuf != NULL) { 723 m_freem(mbuf); 724 sq->snd_buff[cqe_tx->sqe_ptr].mbuf = NULL; 725 nicvf_put_sq_desc(sq, hdr->subdesc_cnt + 1); 726 } 727 728 nicvf_check_cqe_tx_errs(nic, cq, cqe_tx); 729} 730 731static int 732nicvf_cq_intr_handler(struct nicvf *nic, uint8_t cq_idx) 733{ 734 struct mbuf *mbuf; 735 struct ifnet *ifp; 736 int processed_cqe, work_done = 0, tx_done = 0; 737 int cqe_count, cqe_head; 738 struct queue_set *qs = nic->qs; 739 struct cmp_queue *cq = &qs->cq[cq_idx]; 740 struct snd_queue *sq = &qs->sq[cq_idx]; 741 struct rcv_queue *rq; 742 struct cqe_rx_t *cq_desc; 743 struct lro_ctrl *lro; 744 int rq_idx; 745 int cmp_err; 746 747 NICVF_CMP_LOCK(cq); 748 cmp_err = 0; 749 processed_cqe = 0; 750 /* Get no of valid CQ entries to process */ 751 cqe_count = nicvf_queue_reg_read(nic, NIC_QSET_CQ_0_7_STATUS, cq_idx); 752 cqe_count &= CQ_CQE_COUNT; 753 if (cqe_count == 0) 754 goto out; 755 756 /* Get head of the valid CQ entries */ 757 cqe_head = nicvf_queue_reg_read(nic, NIC_QSET_CQ_0_7_HEAD, cq_idx) >> 9; 758 cqe_head &= 0xFFFF; 759 760 dprintf(nic->dev, "%s CQ%d cqe_count %d cqe_head %d\n", 761 __func__, cq_idx, cqe_count, cqe_head); 762 while (processed_cqe < cqe_count) { 763 /* Get the CQ descriptor */ 764 cq_desc = (struct cqe_rx_t *)GET_CQ_DESC(cq, cqe_head); 765 cqe_head++; 766 cqe_head &= (cq->dmem.q_len - 1); 767 /* Prefetch next CQ descriptor */ 768 __builtin_prefetch((struct cqe_rx_t *)GET_CQ_DESC(cq, cqe_head)); 769 770 dprintf(nic->dev, "CQ%d cq_desc->cqe_type %d\n", cq_idx, 771 cq_desc->cqe_type); 772 switch (cq_desc->cqe_type) { 773 case CQE_TYPE_RX: 774 cmp_err = nicvf_rcv_pkt_handler(nic, cq, cq_desc, 775 CQE_TYPE_RX); 776 if (__predict_false(cmp_err != 0)) { 777 /* 778 * Ups. Cannot finish now. 779 * Let's try again later. 780 */ 781 goto done; 782 } 783 work_done++; 784 break; 785 case CQE_TYPE_SEND: 786 nicvf_snd_pkt_handler(nic, cq, (void *)cq_desc, 787 CQE_TYPE_SEND); 788 tx_done++; 789 break; 790 case CQE_TYPE_INVALID: 791 case CQE_TYPE_RX_SPLIT: 792 case CQE_TYPE_RX_TCP: 793 case CQE_TYPE_SEND_PTP: 794 /* Ignore for now */ 795 break; 796 } 797 processed_cqe++; 798 } 799done: 800 dprintf(nic->dev, 801 "%s CQ%d processed_cqe %d work_done %d\n", 802 __func__, cq_idx, processed_cqe, work_done); 803 804 /* Ring doorbell to inform H/W to reuse processed CQEs */ 805 nicvf_queue_reg_write(nic, NIC_QSET_CQ_0_7_DOOR, cq_idx, processed_cqe); 806 807 if ((tx_done > 0) && 808 ((if_getdrvflags(nic->ifp) & IFF_DRV_RUNNING) != 0)) { 809 /* Reenable TXQ if its stopped earlier due to SQ full */ 810 if_setdrvflagbits(nic->ifp, IFF_DRV_RUNNING, IFF_DRV_OACTIVE); 811 taskqueue_enqueue(sq->snd_taskq, &sq->snd_task); 812 } 813out: 814 /* 815 * Flush any outstanding LRO work 816 */ 817 rq_idx = cq_idx; 818 rq = &nic->qs->rq[rq_idx]; 819 lro = &rq->lro; 820 tcp_lro_flush_all(lro); 821 822 NICVF_CMP_UNLOCK(cq); 823 824 ifp = nic->ifp; 825 /* Push received MBUFs to the stack */ 826 while (!buf_ring_empty(cq->rx_br)) { 827 mbuf = buf_ring_dequeue_mc(cq->rx_br); 828 if (__predict_true(mbuf != NULL)) 829 (*ifp->if_input)(ifp, mbuf); 830 } 831 832 return (cmp_err); 833} 834 835/* 836 * Qset error interrupt handler 837 * 838 * As of now only CQ errors are handled 839 */ 840static void 841nicvf_qs_err_task(void *arg, int pending) 842{ 843 struct nicvf *nic; 844 struct queue_set *qs; 845 int qidx; 846 uint64_t status; 847 boolean_t enable = TRUE; 848 849 nic = (struct nicvf *)arg; 850 qs = nic->qs; 851 852 /* Deactivate network interface */ 853 if_setdrvflagbits(nic->ifp, IFF_DRV_OACTIVE, IFF_DRV_RUNNING); 854 855 /* Check if it is CQ err */ 856 for (qidx = 0; qidx < qs->cq_cnt; qidx++) { 857 status = nicvf_queue_reg_read(nic, NIC_QSET_CQ_0_7_STATUS, 858 qidx); 859 if ((status & CQ_ERR_MASK) == 0) 860 continue; 861 /* Process already queued CQEs and reconfig CQ */ 862 nicvf_disable_intr(nic, NICVF_INTR_CQ, qidx); 863 nicvf_sq_disable(nic, qidx); 864 (void)nicvf_cq_intr_handler(nic, qidx); 865 nicvf_cmp_queue_config(nic, qs, qidx, enable); 866 nicvf_sq_free_used_descs(nic, &qs->sq[qidx], qidx); 867 nicvf_sq_enable(nic, &qs->sq[qidx], qidx); 868 nicvf_enable_intr(nic, NICVF_INTR_CQ, qidx); 869 } 870 871 if_setdrvflagbits(nic->ifp, IFF_DRV_RUNNING, IFF_DRV_OACTIVE); 872 /* Re-enable Qset error interrupt */ 873 nicvf_enable_intr(nic, NICVF_INTR_QS_ERR, 0); 874} 875 876static void 877nicvf_cmp_task(void *arg, int pending) 878{ 879 struct cmp_queue *cq; 880 struct nicvf *nic; 881 int cmp_err; 882 883 cq = (struct cmp_queue *)arg; 884 nic = cq->nic; 885 886 /* Handle CQ descriptors */ 887 cmp_err = nicvf_cq_intr_handler(nic, cq->idx); 888 if (__predict_false(cmp_err != 0)) { 889 /* 890 * Schedule another thread here since we did not 891 * process the entire CQ due to Tx or Rx CQ parse error. 892 */ 893 taskqueue_enqueue(cq->cmp_taskq, &cq->cmp_task); 894 895 } 896 897 nicvf_clear_intr(nic, NICVF_INTR_CQ, cq->idx); 898 /* Reenable interrupt (previously disabled in nicvf_intr_handler() */ 899 nicvf_enable_intr(nic, NICVF_INTR_CQ, cq->idx); 900 901} 902 903/* Initialize completion queue */ 904static int 905nicvf_init_cmp_queue(struct nicvf *nic, struct cmp_queue *cq, int q_len, 906 int qidx) 907{ 908 int err; 909 910 /* Initizalize lock */ 911 snprintf(cq->mtx_name, sizeof(cq->mtx_name), "%s: CQ(%d) lock", 912 device_get_nameunit(nic->dev), qidx); 913 mtx_init(&cq->mtx, cq->mtx_name, NULL, MTX_DEF); 914 915 err = nicvf_alloc_q_desc_mem(nic, &cq->dmem, q_len, CMP_QUEUE_DESC_SIZE, 916 NICVF_CQ_BASE_ALIGN_BYTES); 917 918 if (err != 0) { 919 device_printf(nic->dev, 920 "Could not allocate DMA memory for CQ\n"); 921 return (err); 922 } 923 924 cq->desc = cq->dmem.base; 925 cq->thresh = pass1_silicon(nic->dev) ? 0 : CMP_QUEUE_CQE_THRESH; 926 cq->nic = nic; 927 cq->idx = qidx; 928 nic->cq_coalesce_usecs = (CMP_QUEUE_TIMER_THRESH * 0.05) - 1; 929 930 cq->rx_br = buf_ring_alloc(CMP_QUEUE_LEN * 8, M_DEVBUF, M_WAITOK, 931 &cq->mtx); 932 933 /* Allocate taskqueue */ 934 TASK_INIT(&cq->cmp_task, 0, nicvf_cmp_task, cq); 935 cq->cmp_taskq = taskqueue_create_fast("nicvf_cmp_taskq", M_WAITOK, 936 taskqueue_thread_enqueue, &cq->cmp_taskq); 937 taskqueue_start_threads(&cq->cmp_taskq, 1, PI_NET, "%s: cmp_taskq(%d)", 938 device_get_nameunit(nic->dev), qidx); 939 940 return (0); 941} 942 943static void 944nicvf_free_cmp_queue(struct nicvf *nic, struct cmp_queue *cq) 945{ 946 947 if (cq == NULL) 948 return; 949 /* 950 * The completion queue itself should be disabled by now 951 * (ref. nicvf_snd_queue_config()). 952 * Ensure that it is safe to disable it or panic. 953 */ 954 if (cq->enable) 955 panic("%s: Trying to free working CQ(%d)", __func__, cq->idx); 956 957 if (cq->cmp_taskq != NULL) { 958 /* Remove task */ 959 while (taskqueue_cancel(cq->cmp_taskq, &cq->cmp_task, NULL) != 0) 960 taskqueue_drain(cq->cmp_taskq, &cq->cmp_task); 961 962 taskqueue_free(cq->cmp_taskq); 963 cq->cmp_taskq = NULL; 964 } 965 /* 966 * Completion interrupt will possibly enable interrupts again 967 * so disable interrupting now after we finished processing 968 * completion task. It is safe to do so since the corresponding CQ 969 * was already disabled. 970 */ 971 nicvf_disable_intr(nic, NICVF_INTR_CQ, cq->idx); 972 nicvf_clear_intr(nic, NICVF_INTR_CQ, cq->idx); 973 974 NICVF_CMP_LOCK(cq); 975 nicvf_free_q_desc_mem(nic, &cq->dmem); 976 drbr_free(cq->rx_br, M_DEVBUF); 977 NICVF_CMP_UNLOCK(cq); 978 mtx_destroy(&cq->mtx); 979 memset(cq->mtx_name, 0, sizeof(cq->mtx_name)); 980} 981 982int 983nicvf_xmit_locked(struct snd_queue *sq) 984{ 985 struct nicvf *nic; 986 struct ifnet *ifp; 987 struct mbuf *next; 988 int err; 989 990 NICVF_TX_LOCK_ASSERT(sq); 991 992 nic = sq->nic; 993 ifp = nic->ifp; 994 err = 0; 995 996 while ((next = drbr_peek(ifp, sq->br)) != NULL) { 997 /* Send a copy of the frame to the BPF listener */ 998 ETHER_BPF_MTAP(ifp, next); 999 1000 err = nicvf_tx_mbuf_locked(sq, &next); 1001 if (err != 0) { 1002 if (next == NULL) 1003 drbr_advance(ifp, sq->br); 1004 else 1005 drbr_putback(ifp, sq->br, next); 1006 1007 break; 1008 } 1009 drbr_advance(ifp, sq->br); 1010 } 1011 return (err); 1012} 1013 1014static void 1015nicvf_snd_task(void *arg, int pending) 1016{ 1017 struct snd_queue *sq = (struct snd_queue *)arg; 1018 struct nicvf *nic; 1019 struct ifnet *ifp; 1020 int err; 1021 1022 nic = sq->nic; 1023 ifp = nic->ifp; 1024 1025 /* 1026 * Skip sending anything if the driver is not running, 1027 * SQ full or link is down. 1028 */ 1029 if (((if_getdrvflags(ifp) & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) != 1030 IFF_DRV_RUNNING) || !nic->link_up) 1031 return; 1032 1033 NICVF_TX_LOCK(sq); 1034 err = nicvf_xmit_locked(sq); 1035 NICVF_TX_UNLOCK(sq); 1036 /* Try again */ 1037 if (err != 0) 1038 taskqueue_enqueue(sq->snd_taskq, &sq->snd_task); 1039} 1040 1041/* Initialize transmit queue */ 1042static int 1043nicvf_init_snd_queue(struct nicvf *nic, struct snd_queue *sq, int q_len, 1044 int qidx) 1045{ 1046 size_t i; 1047 int err; 1048 1049 /* Initizalize TX lock for this queue */ 1050 snprintf(sq->mtx_name, sizeof(sq->mtx_name), "%s: SQ(%d) lock", 1051 device_get_nameunit(nic->dev), qidx); 1052 mtx_init(&sq->mtx, sq->mtx_name, NULL, MTX_DEF); 1053 1054 NICVF_TX_LOCK(sq); 1055 /* Allocate buffer ring */ 1056 sq->br = buf_ring_alloc(q_len / MIN_SQ_DESC_PER_PKT_XMIT, M_DEVBUF, 1057 M_NOWAIT, &sq->mtx); 1058 if (sq->br == NULL) { 1059 device_printf(nic->dev, 1060 "ERROR: Could not set up buf ring for SQ(%d)\n", qidx); 1061 err = ENOMEM; 1062 goto error; 1063 } 1064 1065 /* Allocate DMA memory for Tx descriptors */ 1066 err = nicvf_alloc_q_desc_mem(nic, &sq->dmem, q_len, SND_QUEUE_DESC_SIZE, 1067 NICVF_SQ_BASE_ALIGN_BYTES); 1068 if (err != 0) { 1069 device_printf(nic->dev, 1070 "Could not allocate DMA memory for SQ\n"); 1071 goto error; 1072 } 1073 1074 sq->desc = sq->dmem.base; 1075 sq->head = sq->tail = 0; 1076 atomic_store_rel_int(&sq->free_cnt, q_len - 1); 1077 sq->thresh = SND_QUEUE_THRESH; 1078 sq->idx = qidx; 1079 sq->nic = nic; 1080 1081 /* 1082 * Allocate DMA maps for Tx buffers 1083 */ 1084 1085 /* Create DMA tag first */ 1086 err = bus_dma_tag_create( 1087 bus_get_dma_tag(nic->dev), /* parent tag */ 1088 1, /* alignment */ 1089 0, /* boundary */ 1090 BUS_SPACE_MAXADDR, /* lowaddr */ 1091 BUS_SPACE_MAXADDR, /* highaddr */ 1092 NULL, NULL, /* filtfunc, filtfuncarg */ 1093 NICVF_TSO_MAXSIZE, /* maxsize */ 1094 NICVF_TSO_NSEGS, /* nsegments */ 1095 MCLBYTES, /* maxsegsize */ 1096 0, /* flags */ 1097 NULL, NULL, /* lockfunc, lockfuncarg */ 1098 &sq->snd_buff_dmat); /* dmat */ 1099 1100 if (err != 0) { 1101 device_printf(nic->dev, 1102 "Failed to create busdma tag for Tx buffers\n"); 1103 goto error; 1104 } 1105 1106 /* Allocate send buffers array */ 1107 sq->snd_buff = malloc(sizeof(*sq->snd_buff) * q_len, M_NICVF, 1108 (M_NOWAIT | M_ZERO)); 1109 if (sq->snd_buff == NULL) { 1110 device_printf(nic->dev, 1111 "Could not allocate memory for Tx buffers array\n"); 1112 err = ENOMEM; 1113 goto error; 1114 } 1115 1116 /* Now populate maps */ 1117 for (i = 0; i < q_len; i++) { 1118 err = bus_dmamap_create(sq->snd_buff_dmat, 0, 1119 &sq->snd_buff[i].dmap); 1120 if (err != 0) { 1121 device_printf(nic->dev, 1122 "Failed to create DMA maps for Tx buffers\n"); 1123 goto error; 1124 } 1125 } 1126 NICVF_TX_UNLOCK(sq); 1127 1128 /* Allocate taskqueue */ 1129 TASK_INIT(&sq->snd_task, 0, nicvf_snd_task, sq); 1130 sq->snd_taskq = taskqueue_create_fast("nicvf_snd_taskq", M_WAITOK, 1131 taskqueue_thread_enqueue, &sq->snd_taskq); 1132 taskqueue_start_threads(&sq->snd_taskq, 1, PI_NET, "%s: snd_taskq(%d)", 1133 device_get_nameunit(nic->dev), qidx); 1134 1135 return (0); 1136error: 1137 NICVF_TX_UNLOCK(sq); 1138 return (err); 1139} 1140 1141static void 1142nicvf_free_snd_queue(struct nicvf *nic, struct snd_queue *sq) 1143{ 1144 struct queue_set *qs = nic->qs; 1145 size_t i; 1146 int err; 1147 1148 if (sq == NULL) 1149 return; 1150 1151 if (sq->snd_taskq != NULL) { 1152 /* Remove task */ 1153 while (taskqueue_cancel(sq->snd_taskq, &sq->snd_task, NULL) != 0) 1154 taskqueue_drain(sq->snd_taskq, &sq->snd_task); 1155 1156 taskqueue_free(sq->snd_taskq); 1157 sq->snd_taskq = NULL; 1158 } 1159 1160 NICVF_TX_LOCK(sq); 1161 if (sq->snd_buff_dmat != NULL) { 1162 if (sq->snd_buff != NULL) { 1163 for (i = 0; i < qs->sq_len; i++) { 1164 m_freem(sq->snd_buff[i].mbuf); 1165 sq->snd_buff[i].mbuf = NULL; 1166 1167 bus_dmamap_unload(sq->snd_buff_dmat, 1168 sq->snd_buff[i].dmap); 1169 err = bus_dmamap_destroy(sq->snd_buff_dmat, 1170 sq->snd_buff[i].dmap); 1171 /* 1172 * If bus_dmamap_destroy fails it can cause 1173 * random panic later if the tag is also 1174 * destroyed in the process. 1175 */ 1176 KASSERT(err == 0, 1177 ("%s: Could not destroy DMA map for SQ", 1178 __func__)); 1179 } 1180 } 1181 1182 free(sq->snd_buff, M_NICVF); 1183 1184 err = bus_dma_tag_destroy(sq->snd_buff_dmat); 1185 KASSERT(err == 0, 1186 ("%s: Trying to destroy BUSY DMA tag", __func__)); 1187 } 1188 1189 /* Free private driver ring for this send queue */ 1190 if (sq->br != NULL) 1191 drbr_free(sq->br, M_DEVBUF); 1192 1193 if (sq->dmem.base != NULL) 1194 nicvf_free_q_desc_mem(nic, &sq->dmem); 1195 1196 NICVF_TX_UNLOCK(sq); 1197 /* Destroy Tx lock */ 1198 mtx_destroy(&sq->mtx); 1199 memset(sq->mtx_name, 0, sizeof(sq->mtx_name)); 1200} 1201 1202static void 1203nicvf_reclaim_snd_queue(struct nicvf *nic, struct queue_set *qs, int qidx) 1204{ 1205 1206 /* Disable send queue */ 1207 nicvf_queue_reg_write(nic, NIC_QSET_SQ_0_7_CFG, qidx, 0); 1208 /* Check if SQ is stopped */ 1209 if (nicvf_poll_reg(nic, qidx, NIC_QSET_SQ_0_7_STATUS, 21, 1, 0x01)) 1210 return; 1211 /* Reset send queue */ 1212 nicvf_queue_reg_write(nic, NIC_QSET_SQ_0_7_CFG, qidx, NICVF_SQ_RESET); 1213} 1214 1215static void 1216nicvf_reclaim_rcv_queue(struct nicvf *nic, struct queue_set *qs, int qidx) 1217{ 1218 union nic_mbx mbx = {}; 1219 1220 /* Make sure all packets in the pipeline are written back into mem */ 1221 mbx.msg.msg = NIC_MBOX_MSG_RQ_SW_SYNC; 1222 nicvf_send_msg_to_pf(nic, &mbx); 1223} 1224 1225static void 1226nicvf_reclaim_cmp_queue(struct nicvf *nic, struct queue_set *qs, int qidx) 1227{ 1228 1229 /* Disable timer threshold (doesn't get reset upon CQ reset */ 1230 nicvf_queue_reg_write(nic, NIC_QSET_CQ_0_7_CFG2, qidx, 0); 1231 /* Disable completion queue */ 1232 nicvf_queue_reg_write(nic, NIC_QSET_CQ_0_7_CFG, qidx, 0); 1233 /* Reset completion queue */ 1234 nicvf_queue_reg_write(nic, NIC_QSET_CQ_0_7_CFG, qidx, NICVF_CQ_RESET); 1235} 1236 1237static void 1238nicvf_reclaim_rbdr(struct nicvf *nic, struct rbdr *rbdr, int qidx) 1239{ 1240 uint64_t tmp, fifo_state; 1241 int timeout = 10; 1242 1243 /* Save head and tail pointers for feeing up buffers */ 1244 rbdr->head = 1245 nicvf_queue_reg_read(nic, NIC_QSET_RBDR_0_1_HEAD, qidx) >> 3; 1246 rbdr->tail = 1247 nicvf_queue_reg_read(nic, NIC_QSET_RBDR_0_1_TAIL, qidx) >> 3; 1248 1249 /* 1250 * If RBDR FIFO is in 'FAIL' state then do a reset first 1251 * before relaiming. 1252 */ 1253 fifo_state = nicvf_queue_reg_read(nic, NIC_QSET_RBDR_0_1_STATUS0, qidx); 1254 if (((fifo_state >> 62) & 0x03) == 0x3) { 1255 nicvf_queue_reg_write(nic, NIC_QSET_RBDR_0_1_CFG, 1256 qidx, NICVF_RBDR_RESET); 1257 } 1258 1259 /* Disable RBDR */ 1260 nicvf_queue_reg_write(nic, NIC_QSET_RBDR_0_1_CFG, qidx, 0); 1261 if (nicvf_poll_reg(nic, qidx, NIC_QSET_RBDR_0_1_STATUS0, 62, 2, 0x00)) 1262 return; 1263 while (1) { 1264 tmp = nicvf_queue_reg_read(nic, 1265 NIC_QSET_RBDR_0_1_PREFETCH_STATUS, qidx); 1266 if ((tmp & 0xFFFFFFFF) == ((tmp >> 32) & 0xFFFFFFFF)) 1267 break; 1268 1269 DELAY(1000); 1270 timeout--; 1271 if (!timeout) { 1272 device_printf(nic->dev, 1273 "Failed polling on prefetch status\n"); 1274 return; 1275 } 1276 } 1277 nicvf_queue_reg_write(nic, NIC_QSET_RBDR_0_1_CFG, qidx, 1278 NICVF_RBDR_RESET); 1279 1280 if (nicvf_poll_reg(nic, qidx, NIC_QSET_RBDR_0_1_STATUS0, 62, 2, 0x02)) 1281 return; 1282 nicvf_queue_reg_write(nic, NIC_QSET_RBDR_0_1_CFG, qidx, 0x00); 1283 if (nicvf_poll_reg(nic, qidx, NIC_QSET_RBDR_0_1_STATUS0, 62, 2, 0x00)) 1284 return; 1285} 1286 1287/* Configures receive queue */ 1288static void 1289nicvf_rcv_queue_config(struct nicvf *nic, struct queue_set *qs, 1290 int qidx, bool enable) 1291{ 1292 union nic_mbx mbx = {}; 1293 struct rcv_queue *rq; 1294 struct rq_cfg rq_cfg; 1295 struct ifnet *ifp; 1296 struct lro_ctrl *lro; 1297 1298 ifp = nic->ifp; 1299 1300 rq = &qs->rq[qidx]; 1301 rq->enable = enable; 1302 1303 lro = &rq->lro; 1304 1305 /* Disable receive queue */ 1306 nicvf_queue_reg_write(nic, NIC_QSET_RQ_0_7_CFG, qidx, 0); 1307 1308 if (!rq->enable) { 1309 nicvf_reclaim_rcv_queue(nic, qs, qidx); 1310 /* Free LRO memory */ 1311 tcp_lro_free(lro); 1312 rq->lro_enabled = FALSE; 1313 return; 1314 } 1315 1316 /* Configure LRO if enabled */ 1317 rq->lro_enabled = FALSE; 1318 if ((if_getcapenable(ifp) & IFCAP_LRO) != 0) { 1319 if (tcp_lro_init(lro) != 0) { 1320 device_printf(nic->dev, 1321 "Failed to initialize LRO for RXQ%d\n", qidx); 1322 } else { 1323 rq->lro_enabled = TRUE; 1324 lro->ifp = nic->ifp; 1325 } 1326 } 1327 1328 rq->cq_qs = qs->vnic_id; 1329 rq->cq_idx = qidx; 1330 rq->start_rbdr_qs = qs->vnic_id; 1331 rq->start_qs_rbdr_idx = qs->rbdr_cnt - 1; 1332 rq->cont_rbdr_qs = qs->vnic_id; 1333 rq->cont_qs_rbdr_idx = qs->rbdr_cnt - 1; 1334 /* all writes of RBDR data to be loaded into L2 Cache as well*/ 1335 rq->caching = 1; 1336 1337 /* Send a mailbox msg to PF to config RQ */ 1338 mbx.rq.msg = NIC_MBOX_MSG_RQ_CFG; 1339 mbx.rq.qs_num = qs->vnic_id; 1340 mbx.rq.rq_num = qidx; 1341 mbx.rq.cfg = (rq->caching << 26) | (rq->cq_qs << 19) | 1342 (rq->cq_idx << 16) | (rq->cont_rbdr_qs << 9) | 1343 (rq->cont_qs_rbdr_idx << 8) | (rq->start_rbdr_qs << 1) | 1344 (rq->start_qs_rbdr_idx); 1345 nicvf_send_msg_to_pf(nic, &mbx); 1346 1347 mbx.rq.msg = NIC_MBOX_MSG_RQ_BP_CFG; 1348 mbx.rq.cfg = (1UL << 63) | (1UL << 62) | (qs->vnic_id << 0); 1349 nicvf_send_msg_to_pf(nic, &mbx); 1350 1351 /* 1352 * RQ drop config 1353 * Enable CQ drop to reserve sufficient CQEs for all tx packets 1354 */ 1355 mbx.rq.msg = NIC_MBOX_MSG_RQ_DROP_CFG; 1356 mbx.rq.cfg = (1UL << 62) | (RQ_CQ_DROP << 8); 1357 nicvf_send_msg_to_pf(nic, &mbx); 1358 1359 nicvf_queue_reg_write(nic, NIC_QSET_RQ_GEN_CFG, 0, 0x00); 1360 1361 /* Enable Receive queue */ 1362 rq_cfg.ena = 1; 1363 rq_cfg.tcp_ena = 0; 1364 nicvf_queue_reg_write(nic, NIC_QSET_RQ_0_7_CFG, qidx, 1365 *(uint64_t *)&rq_cfg); 1366} 1367 1368/* Configures completion queue */ 1369static void 1370nicvf_cmp_queue_config(struct nicvf *nic, struct queue_set *qs, 1371 int qidx, boolean_t enable) 1372{ 1373 struct cmp_queue *cq; 1374 struct cq_cfg cq_cfg; 1375 1376 cq = &qs->cq[qidx]; 1377 cq->enable = enable; 1378 1379 if (!cq->enable) { 1380 nicvf_reclaim_cmp_queue(nic, qs, qidx); 1381 return; 1382 } 1383 1384 /* Reset completion queue */ 1385 nicvf_queue_reg_write(nic, NIC_QSET_CQ_0_7_CFG, qidx, NICVF_CQ_RESET); 1386 1387 /* Set completion queue base address */ 1388 nicvf_queue_reg_write(nic, NIC_QSET_CQ_0_7_BASE, qidx, 1389 (uint64_t)(cq->dmem.phys_base)); 1390 1391 /* Enable Completion queue */ 1392 cq_cfg.ena = 1; 1393 cq_cfg.reset = 0; 1394 cq_cfg.caching = 0; 1395 cq_cfg.qsize = CMP_QSIZE; 1396 cq_cfg.avg_con = 0; 1397 nicvf_queue_reg_write(nic, NIC_QSET_CQ_0_7_CFG, qidx, *(uint64_t *)&cq_cfg); 1398 1399 /* Set threshold value for interrupt generation */ 1400 nicvf_queue_reg_write(nic, NIC_QSET_CQ_0_7_THRESH, qidx, cq->thresh); 1401 nicvf_queue_reg_write(nic, NIC_QSET_CQ_0_7_CFG2, qidx, 1402 nic->cq_coalesce_usecs); 1403} 1404 1405/* Configures transmit queue */ 1406static void 1407nicvf_snd_queue_config(struct nicvf *nic, struct queue_set *qs, int qidx, 1408 boolean_t enable) 1409{ 1410 union nic_mbx mbx = {}; 1411 struct snd_queue *sq; 1412 struct sq_cfg sq_cfg; 1413 1414 sq = &qs->sq[qidx]; 1415 sq->enable = enable; 1416 1417 if (!sq->enable) { 1418 nicvf_reclaim_snd_queue(nic, qs, qidx); 1419 return; 1420 } 1421 1422 /* Reset send queue */ 1423 nicvf_queue_reg_write(nic, NIC_QSET_SQ_0_7_CFG, qidx, NICVF_SQ_RESET); 1424 1425 sq->cq_qs = qs->vnic_id; 1426 sq->cq_idx = qidx; 1427 1428 /* Send a mailbox msg to PF to config SQ */ 1429 mbx.sq.msg = NIC_MBOX_MSG_SQ_CFG; 1430 mbx.sq.qs_num = qs->vnic_id; 1431 mbx.sq.sq_num = qidx; 1432 mbx.sq.sqs_mode = nic->sqs_mode; 1433 mbx.sq.cfg = (sq->cq_qs << 3) | sq->cq_idx; 1434 nicvf_send_msg_to_pf(nic, &mbx); 1435 1436 /* Set queue base address */ 1437 nicvf_queue_reg_write(nic, NIC_QSET_SQ_0_7_BASE, qidx, 1438 (uint64_t)(sq->dmem.phys_base)); 1439 1440 /* Enable send queue & set queue size */ 1441 sq_cfg.ena = 1; 1442 sq_cfg.reset = 0; 1443 sq_cfg.ldwb = 0; 1444 sq_cfg.qsize = SND_QSIZE; 1445 sq_cfg.tstmp_bgx_intf = 0; 1446 nicvf_queue_reg_write(nic, NIC_QSET_SQ_0_7_CFG, qidx, *(uint64_t *)&sq_cfg); 1447 1448 /* Set threshold value for interrupt generation */ 1449 nicvf_queue_reg_write(nic, NIC_QSET_SQ_0_7_THRESH, qidx, sq->thresh); 1450} 1451 1452/* Configures receive buffer descriptor ring */ 1453static void 1454nicvf_rbdr_config(struct nicvf *nic, struct queue_set *qs, int qidx, 1455 boolean_t enable) 1456{ 1457 struct rbdr *rbdr; 1458 struct rbdr_cfg rbdr_cfg; 1459 1460 rbdr = &qs->rbdr[qidx]; 1461 nicvf_reclaim_rbdr(nic, rbdr, qidx); 1462 if (!enable) 1463 return; 1464 1465 /* Set descriptor base address */ 1466 nicvf_queue_reg_write(nic, NIC_QSET_RBDR_0_1_BASE, qidx, 1467 (uint64_t)(rbdr->dmem.phys_base)); 1468 1469 /* Enable RBDR & set queue size */ 1470 /* Buffer size should be in multiples of 128 bytes */ 1471 rbdr_cfg.ena = 1; 1472 rbdr_cfg.reset = 0; 1473 rbdr_cfg.ldwb = 0; 1474 rbdr_cfg.qsize = RBDR_SIZE; 1475 rbdr_cfg.avg_con = 0; 1476 rbdr_cfg.lines = rbdr->dma_size / 128; 1477 nicvf_queue_reg_write(nic, NIC_QSET_RBDR_0_1_CFG, qidx, 1478 *(uint64_t *)&rbdr_cfg); 1479 1480 /* Notify HW */ 1481 nicvf_queue_reg_write(nic, NIC_QSET_RBDR_0_1_DOOR, qidx, 1482 qs->rbdr_len - 1); 1483 1484 /* Set threshold value for interrupt generation */ 1485 nicvf_queue_reg_write(nic, NIC_QSET_RBDR_0_1_THRESH, qidx, 1486 rbdr->thresh - 1); 1487} 1488 1489/* Requests PF to assign and enable Qset */ 1490void 1491nicvf_qset_config(struct nicvf *nic, boolean_t enable) 1492{ 1493 union nic_mbx mbx = {}; 1494 struct queue_set *qs; 1495 struct qs_cfg *qs_cfg; 1496 1497 qs = nic->qs; 1498 if (qs == NULL) { 1499 device_printf(nic->dev, 1500 "Qset is still not allocated, don't init queues\n"); 1501 return; 1502 } 1503 1504 qs->enable = enable; 1505 qs->vnic_id = nic->vf_id; 1506 1507 /* Send a mailbox msg to PF to config Qset */ 1508 mbx.qs.msg = NIC_MBOX_MSG_QS_CFG; 1509 mbx.qs.num = qs->vnic_id; 1510 1511 mbx.qs.cfg = 0; 1512 qs_cfg = (struct qs_cfg *)&mbx.qs.cfg; 1513 if (qs->enable) { 1514 qs_cfg->ena = 1; 1515 qs_cfg->vnic = qs->vnic_id; 1516 } 1517 nicvf_send_msg_to_pf(nic, &mbx); 1518} 1519 1520static void 1521nicvf_free_resources(struct nicvf *nic) 1522{ 1523 int qidx; 1524 struct queue_set *qs; 1525 1526 qs = nic->qs; 1527 /* 1528 * Remove QS error task first since it has to be dead 1529 * to safely free completion queue tasks. 1530 */ 1531 if (qs->qs_err_taskq != NULL) { 1532 /* Shut down QS error tasks */ 1533 while (taskqueue_cancel(qs->qs_err_taskq, 1534 &qs->qs_err_task, NULL) != 0) { 1535 taskqueue_drain(qs->qs_err_taskq, &qs->qs_err_task); 1536 1537 } 1538 taskqueue_free(qs->qs_err_taskq); 1539 qs->qs_err_taskq = NULL; 1540 } 1541 /* Free receive buffer descriptor ring */ 1542 for (qidx = 0; qidx < qs->rbdr_cnt; qidx++) 1543 nicvf_free_rbdr(nic, &qs->rbdr[qidx]); 1544 1545 /* Free completion queue */ 1546 for (qidx = 0; qidx < qs->cq_cnt; qidx++) 1547 nicvf_free_cmp_queue(nic, &qs->cq[qidx]); 1548 1549 /* Free send queue */ 1550 for (qidx = 0; qidx < qs->sq_cnt; qidx++) 1551 nicvf_free_snd_queue(nic, &qs->sq[qidx]); 1552} 1553 1554static int 1555nicvf_alloc_resources(struct nicvf *nic) 1556{ 1557 struct queue_set *qs = nic->qs; 1558 int qidx; 1559 1560 /* Alloc receive buffer descriptor ring */ 1561 for (qidx = 0; qidx < qs->rbdr_cnt; qidx++) { 1562 if (nicvf_init_rbdr(nic, &qs->rbdr[qidx], qs->rbdr_len, 1563 DMA_BUFFER_LEN, qidx)) 1564 goto alloc_fail; 1565 } 1566 1567 /* Alloc send queue */ 1568 for (qidx = 0; qidx < qs->sq_cnt; qidx++) { 1569 if (nicvf_init_snd_queue(nic, &qs->sq[qidx], qs->sq_len, qidx)) 1570 goto alloc_fail; 1571 } 1572 1573 /* Alloc completion queue */ 1574 for (qidx = 0; qidx < qs->cq_cnt; qidx++) { 1575 if (nicvf_init_cmp_queue(nic, &qs->cq[qidx], qs->cq_len, qidx)) 1576 goto alloc_fail; 1577 } 1578 1579 /* Allocate QS error taskqueue */ 1580 TASK_INIT(&qs->qs_err_task, 0, nicvf_qs_err_task, nic); 1581 qs->qs_err_taskq = taskqueue_create_fast("nicvf_qs_err_taskq", M_WAITOK, 1582 taskqueue_thread_enqueue, &qs->qs_err_taskq); 1583 taskqueue_start_threads(&qs->qs_err_taskq, 1, PI_NET, "%s: qs_taskq", 1584 device_get_nameunit(nic->dev)); 1585 1586 return (0); 1587alloc_fail: 1588 nicvf_free_resources(nic); 1589 return (ENOMEM); 1590} 1591 1592int 1593nicvf_set_qset_resources(struct nicvf *nic) 1594{ 1595 struct queue_set *qs; 1596 1597 qs = malloc(sizeof(*qs), M_NICVF, (M_ZERO | M_WAITOK)); 1598 nic->qs = qs; 1599 1600 /* Set count of each queue */ 1601 qs->rbdr_cnt = RBDR_CNT; 1602 qs->rq_cnt = RCV_QUEUE_CNT; 1603 1604 qs->sq_cnt = SND_QUEUE_CNT; 1605 qs->cq_cnt = CMP_QUEUE_CNT; 1606 1607 /* Set queue lengths */ 1608 qs->rbdr_len = RCV_BUF_COUNT; 1609 qs->sq_len = SND_QUEUE_LEN; 1610 qs->cq_len = CMP_QUEUE_LEN; 1611 1612 nic->rx_queues = qs->rq_cnt; 1613 nic->tx_queues = qs->sq_cnt; 1614 1615 return (0); 1616} 1617 1618int 1619nicvf_config_data_transfer(struct nicvf *nic, boolean_t enable) 1620{ 1621 boolean_t disable = FALSE; 1622 struct queue_set *qs; 1623 int qidx; 1624 1625 qs = nic->qs; 1626 if (qs == NULL) 1627 return (0); 1628 1629 if (enable) { 1630 if (nicvf_alloc_resources(nic) != 0) 1631 return (ENOMEM); 1632 1633 for (qidx = 0; qidx < qs->sq_cnt; qidx++) 1634 nicvf_snd_queue_config(nic, qs, qidx, enable); 1635 for (qidx = 0; qidx < qs->cq_cnt; qidx++) 1636 nicvf_cmp_queue_config(nic, qs, qidx, enable); 1637 for (qidx = 0; qidx < qs->rbdr_cnt; qidx++) 1638 nicvf_rbdr_config(nic, qs, qidx, enable); 1639 for (qidx = 0; qidx < qs->rq_cnt; qidx++) 1640 nicvf_rcv_queue_config(nic, qs, qidx, enable); 1641 } else { 1642 for (qidx = 0; qidx < qs->rq_cnt; qidx++) 1643 nicvf_rcv_queue_config(nic, qs, qidx, disable); 1644 for (qidx = 0; qidx < qs->rbdr_cnt; qidx++) 1645 nicvf_rbdr_config(nic, qs, qidx, disable); 1646 for (qidx = 0; qidx < qs->sq_cnt; qidx++) 1647 nicvf_snd_queue_config(nic, qs, qidx, disable); 1648 for (qidx = 0; qidx < qs->cq_cnt; qidx++) 1649 nicvf_cmp_queue_config(nic, qs, qidx, disable); 1650 1651 nicvf_free_resources(nic); 1652 } 1653 1654 return (0); 1655} 1656 1657/* 1658 * Get a free desc from SQ 1659 * returns descriptor ponter & descriptor number 1660 */ 1661static __inline int 1662nicvf_get_sq_desc(struct snd_queue *sq, int desc_cnt) 1663{ 1664 int qentry; 1665 1666 qentry = sq->tail; 1667 atomic_subtract_int(&sq->free_cnt, desc_cnt); 1668 sq->tail += desc_cnt; 1669 sq->tail &= (sq->dmem.q_len - 1); 1670 1671 return (qentry); 1672} 1673 1674/* Free descriptor back to SQ for future use */ 1675static void 1676nicvf_put_sq_desc(struct snd_queue *sq, int desc_cnt) 1677{ 1678 1679 atomic_add_int(&sq->free_cnt, desc_cnt); 1680 sq->head += desc_cnt; 1681 sq->head &= (sq->dmem.q_len - 1); 1682} 1683 1684static __inline int 1685nicvf_get_nxt_sqentry(struct snd_queue *sq, int qentry) 1686{ 1687 qentry++; 1688 qentry &= (sq->dmem.q_len - 1); 1689 return (qentry); 1690} 1691 1692static void 1693nicvf_sq_enable(struct nicvf *nic, struct snd_queue *sq, int qidx) 1694{ 1695 uint64_t sq_cfg; 1696 1697 sq_cfg = nicvf_queue_reg_read(nic, NIC_QSET_SQ_0_7_CFG, qidx); 1698 sq_cfg |= NICVF_SQ_EN; 1699 nicvf_queue_reg_write(nic, NIC_QSET_SQ_0_7_CFG, qidx, sq_cfg); 1700 /* Ring doorbell so that H/W restarts processing SQEs */ 1701 nicvf_queue_reg_write(nic, NIC_QSET_SQ_0_7_DOOR, qidx, 0); 1702} 1703 1704static void 1705nicvf_sq_disable(struct nicvf *nic, int qidx) 1706{ 1707 uint64_t sq_cfg; 1708 1709 sq_cfg = nicvf_queue_reg_read(nic, NIC_QSET_SQ_0_7_CFG, qidx); 1710 sq_cfg &= ~NICVF_SQ_EN; 1711 nicvf_queue_reg_write(nic, NIC_QSET_SQ_0_7_CFG, qidx, sq_cfg); 1712} 1713 1714static void 1715nicvf_sq_free_used_descs(struct nicvf *nic, struct snd_queue *sq, int qidx) 1716{ 1717 uint64_t head, tail; 1718 struct snd_buff *snd_buff; 1719 struct sq_hdr_subdesc *hdr; 1720 1721 NICVF_TX_LOCK(sq); 1722 head = nicvf_queue_reg_read(nic, NIC_QSET_SQ_0_7_HEAD, qidx) >> 4; 1723 tail = nicvf_queue_reg_read(nic, NIC_QSET_SQ_0_7_TAIL, qidx) >> 4; 1724 while (sq->head != head) { 1725 hdr = (struct sq_hdr_subdesc *)GET_SQ_DESC(sq, sq->head); 1726 if (hdr->subdesc_type != SQ_DESC_TYPE_HEADER) { 1727 nicvf_put_sq_desc(sq, 1); 1728 continue; 1729 } 1730 snd_buff = &sq->snd_buff[sq->head]; 1731 if (snd_buff->mbuf != NULL) { 1732 bus_dmamap_unload(sq->snd_buff_dmat, snd_buff->dmap); 1733 m_freem(snd_buff->mbuf); 1734 sq->snd_buff[sq->head].mbuf = NULL; 1735 } 1736 nicvf_put_sq_desc(sq, hdr->subdesc_cnt + 1); 1737 } 1738 NICVF_TX_UNLOCK(sq); 1739} 1740 1741/* 1742 * Add SQ HEADER subdescriptor. 1743 * First subdescriptor for every send descriptor. 1744 */ 1745static __inline int 1746nicvf_sq_add_hdr_subdesc(struct snd_queue *sq, int qentry, 1747 int subdesc_cnt, struct mbuf *mbuf, int len) 1748{ 1749 struct nicvf *nic; 1750 struct sq_hdr_subdesc *hdr; 1751 struct ether_vlan_header *eh; 1752#ifdef INET 1753 struct ip *ip; 1754 struct tcphdr *th; 1755#endif 1756 uint16_t etype; 1757 int ehdrlen, iphlen, poff, proto; 1758 1759 nic = sq->nic; 1760 1761 hdr = (struct sq_hdr_subdesc *)GET_SQ_DESC(sq, qentry); 1762 sq->snd_buff[qentry].mbuf = mbuf; 1763 1764 memset(hdr, 0, SND_QUEUE_DESC_SIZE); 1765 hdr->subdesc_type = SQ_DESC_TYPE_HEADER; 1766 /* Enable notification via CQE after processing SQE */ 1767 hdr->post_cqe = 1; 1768 /* No of subdescriptors following this */ 1769 hdr->subdesc_cnt = subdesc_cnt; 1770 hdr->tot_len = len; 1771 1772 eh = mtod(mbuf, struct ether_vlan_header *); 1773 if (eh->evl_encap_proto == htons(ETHERTYPE_VLAN)) { 1774 ehdrlen = ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN; 1775 etype = ntohs(eh->evl_proto); 1776 } else { 1777 ehdrlen = ETHER_HDR_LEN; 1778 etype = ntohs(eh->evl_encap_proto); 1779 } 1780 1781 poff = proto = -1; 1782 switch (etype) { 1783#ifdef INET6 1784 case ETHERTYPE_IPV6: 1785 if (mbuf->m_len < ehdrlen + sizeof(struct ip6_hdr)) { 1786 mbuf = m_pullup(mbuf, ehdrlen +sizeof(struct ip6_hdr)); 1787 sq->snd_buff[qentry].mbuf = NULL; 1788 if (mbuf == NULL) 1789 return (ENOBUFS); 1790 } 1791 poff = ip6_lasthdr(mbuf, ehdrlen, IPPROTO_IPV6, &proto); 1792 if (poff < 0) 1793 return (ENOBUFS); 1794 poff += ehdrlen; 1795 break; 1796#endif 1797#ifdef INET 1798 case ETHERTYPE_IP: 1799 if (mbuf->m_len < ehdrlen + sizeof(struct ip)) { 1800 mbuf = m_pullup(mbuf, ehdrlen + sizeof(struct ip)); 1801 sq->snd_buff[qentry].mbuf = mbuf; 1802 if (mbuf == NULL) 1803 return (ENOBUFS); 1804 } 1805 if (mbuf->m_pkthdr.csum_flags & CSUM_IP) 1806 hdr->csum_l3 = 1; /* Enable IP csum calculation */ 1807 1808 ip = (struct ip *)(mbuf->m_data + ehdrlen); 1809 iphlen = ip->ip_hl << 2; 1810 poff = ehdrlen + iphlen; 1811 proto = ip->ip_p; 1812 break; 1813#endif 1814 } 1815 1816#if defined(INET6) || defined(INET) 1817 if (poff > 0 && mbuf->m_pkthdr.csum_flags != 0) { 1818 switch (proto) { 1819 case IPPROTO_TCP: 1820 if ((mbuf->m_pkthdr.csum_flags & CSUM_TCP) == 0) 1821 break; 1822 1823 if (mbuf->m_len < (poff + sizeof(struct tcphdr))) { 1824 mbuf = m_pullup(mbuf, poff + sizeof(struct tcphdr)); 1825 sq->snd_buff[qentry].mbuf = mbuf; 1826 if (mbuf == NULL) 1827 return (ENOBUFS); 1828 } 1829 hdr->csum_l4 = SEND_L4_CSUM_TCP; 1830 break; 1831 case IPPROTO_UDP: 1832 if ((mbuf->m_pkthdr.csum_flags & CSUM_UDP) == 0) 1833 break; 1834 1835 if (mbuf->m_len < (poff + sizeof(struct udphdr))) { 1836 mbuf = m_pullup(mbuf, poff + sizeof(struct udphdr)); 1837 sq->snd_buff[qentry].mbuf = mbuf; 1838 if (mbuf == NULL) 1839 return (ENOBUFS); 1840 } 1841 hdr->csum_l4 = SEND_L4_CSUM_UDP; 1842 break; 1843 case IPPROTO_SCTP: 1844 if ((mbuf->m_pkthdr.csum_flags & CSUM_SCTP) == 0) 1845 break; 1846 1847 if (mbuf->m_len < (poff + sizeof(struct sctphdr))) { 1848 mbuf = m_pullup(mbuf, poff + sizeof(struct sctphdr)); 1849 sq->snd_buff[qentry].mbuf = mbuf; 1850 if (mbuf == NULL) 1851 return (ENOBUFS); 1852 } 1853 hdr->csum_l4 = SEND_L4_CSUM_SCTP; 1854 break; 1855 default: 1856 break; 1857 } 1858 hdr->l3_offset = ehdrlen; 1859 hdr->l4_offset = poff; 1860 } 1861 1862 if ((mbuf->m_pkthdr.tso_segsz != 0) && nic->hw_tso) { 1863 th = (struct tcphdr *)((caddr_t)(mbuf->m_data + poff)); 1864 1865 hdr->tso = 1; 1866 hdr->tso_start = poff + (th->th_off * 4); 1867 hdr->tso_max_paysize = mbuf->m_pkthdr.tso_segsz; 1868 hdr->inner_l3_offset = ehdrlen - 2; 1869 nic->drv_stats.tx_tso++; 1870 } 1871#endif 1872 1873 return (0); 1874} 1875 1876/* 1877 * SQ GATHER subdescriptor 1878 * Must follow HDR descriptor 1879 */ 1880static inline void nicvf_sq_add_gather_subdesc(struct snd_queue *sq, int qentry, 1881 int size, uint64_t data) 1882{ 1883 struct sq_gather_subdesc *gather; 1884 1885 qentry &= (sq->dmem.q_len - 1); 1886 gather = (struct sq_gather_subdesc *)GET_SQ_DESC(sq, qentry); 1887 1888 memset(gather, 0, SND_QUEUE_DESC_SIZE); 1889 gather->subdesc_type = SQ_DESC_TYPE_GATHER; 1890 gather->ld_type = NIC_SEND_LD_TYPE_E_LDD; 1891 gather->size = size; 1892 gather->addr = data; 1893} 1894 1895/* Put an mbuf to a SQ for packet transfer. */ 1896static int 1897nicvf_tx_mbuf_locked(struct snd_queue *sq, struct mbuf **mbufp) 1898{ 1899 bus_dma_segment_t segs[256]; 1900 struct snd_buff *snd_buff; 1901 size_t seg; 1902 int nsegs, qentry; 1903 int subdesc_cnt; 1904 int err; 1905 1906 NICVF_TX_LOCK_ASSERT(sq); 1907 1908 if (sq->free_cnt == 0) 1909 return (ENOBUFS); 1910 1911 snd_buff = &sq->snd_buff[sq->tail]; 1912 1913 err = bus_dmamap_load_mbuf_sg(sq->snd_buff_dmat, snd_buff->dmap, 1914 *mbufp, segs, &nsegs, BUS_DMA_NOWAIT); 1915 if (__predict_false(err != 0)) { 1916 /* ARM64TODO: Add mbuf defragmenting if we lack maps */ 1917 m_freem(*mbufp); 1918 *mbufp = NULL; 1919 return (err); 1920 } 1921 1922 /* Set how many subdescriptors is required */ 1923 subdesc_cnt = MIN_SQ_DESC_PER_PKT_XMIT + nsegs - 1; 1924 if (subdesc_cnt > sq->free_cnt) { 1925 /* ARM64TODO: Add mbuf defragmentation if we lack descriptors */ 1926 bus_dmamap_unload(sq->snd_buff_dmat, snd_buff->dmap); 1927 return (ENOBUFS); 1928 } 1929 1930 qentry = nicvf_get_sq_desc(sq, subdesc_cnt); 1931 1932 /* Add SQ header subdesc */ 1933 err = nicvf_sq_add_hdr_subdesc(sq, qentry, subdesc_cnt - 1, *mbufp, 1934 (*mbufp)->m_pkthdr.len); 1935 if (err != 0) { 1936 nicvf_put_sq_desc(sq, subdesc_cnt); 1937 bus_dmamap_unload(sq->snd_buff_dmat, snd_buff->dmap); 1938 if (err == ENOBUFS) { 1939 m_freem(*mbufp); 1940 *mbufp = NULL; 1941 } 1942 return (err); 1943 } 1944 1945 /* Add SQ gather subdescs */ 1946 for (seg = 0; seg < nsegs; seg++) { 1947 qentry = nicvf_get_nxt_sqentry(sq, qentry); 1948 nicvf_sq_add_gather_subdesc(sq, qentry, segs[seg].ds_len, 1949 segs[seg].ds_addr); 1950 } 1951 1952 /* make sure all memory stores are done before ringing doorbell */ 1953 bus_dmamap_sync(sq->dmem.dmat, sq->dmem.dmap, BUS_DMASYNC_PREWRITE); 1954 1955 dprintf(sq->nic->dev, "%s: sq->idx: %d, subdesc_cnt: %d\n", 1956 __func__, sq->idx, subdesc_cnt); 1957 /* Inform HW to xmit new packet */ 1958 nicvf_queue_reg_write(sq->nic, NIC_QSET_SQ_0_7_DOOR, 1959 sq->idx, subdesc_cnt); 1960 return (0); 1961} 1962 1963static __inline u_int 1964frag_num(u_int i) 1965{ 1966#if BYTE_ORDER == BIG_ENDIAN 1967 return ((i & ~3) + 3 - (i & 3)); 1968#else 1969 return (i); 1970#endif 1971} 1972 1973/* Returns MBUF for a received packet */ 1974struct mbuf * 1975nicvf_get_rcv_mbuf(struct nicvf *nic, struct cqe_rx_t *cqe_rx) 1976{ 1977 int frag; 1978 int payload_len = 0; 1979 struct mbuf *mbuf; 1980 struct mbuf *mbuf_frag; 1981 uint16_t *rb_lens = NULL; 1982 uint64_t *rb_ptrs = NULL; 1983 1984 mbuf = NULL; 1985 rb_lens = (uint16_t *)((uint8_t *)cqe_rx + (3 * sizeof(uint64_t))); 1986 rb_ptrs = (uint64_t *)((uint8_t *)cqe_rx + (6 * sizeof(uint64_t))); 1987 1988 dprintf(nic->dev, "%s rb_cnt %d rb0_ptr %lx rb0_sz %d\n", 1989 __func__, cqe_rx->rb_cnt, cqe_rx->rb0_ptr, cqe_rx->rb0_sz); 1990 1991 for (frag = 0; frag < cqe_rx->rb_cnt; frag++) { 1992 payload_len = rb_lens[frag_num(frag)]; 1993 if (frag == 0) { 1994 /* First fragment */ 1995 mbuf = nicvf_rb_ptr_to_mbuf(nic, 1996 (*rb_ptrs - cqe_rx->align_pad)); 1997 mbuf->m_len = payload_len; 1998 mbuf->m_data += cqe_rx->align_pad; 1999 if_setrcvif(mbuf, nic->ifp); 2000 } else { 2001 /* Add fragments */ 2002 mbuf_frag = nicvf_rb_ptr_to_mbuf(nic, *rb_ptrs); 2003 m_append(mbuf, payload_len, mbuf_frag->m_data); 2004 m_freem(mbuf_frag); 2005 } 2006 /* Next buffer pointer */ 2007 rb_ptrs++; 2008 } 2009 2010 if (__predict_true(mbuf != NULL)) { 2011 m_fixhdr(mbuf); 2012 mbuf->m_pkthdr.flowid = cqe_rx->rq_idx; 2013 M_HASHTYPE_SET(mbuf, M_HASHTYPE_OPAQUE); 2014 if (__predict_true((if_getcapenable(nic->ifp) & IFCAP_RXCSUM) != 0)) { 2015 /* 2016 * HW by default verifies IP & TCP/UDP/SCTP checksums 2017 */ 2018 if (__predict_true(cqe_rx->l3_type == L3TYPE_IPV4)) { 2019 mbuf->m_pkthdr.csum_flags = 2020 (CSUM_IP_CHECKED | CSUM_IP_VALID); 2021 } 2022 2023 switch (cqe_rx->l4_type) { 2024 case L4TYPE_UDP: 2025 case L4TYPE_TCP: /* fall through */ 2026 mbuf->m_pkthdr.csum_flags |= 2027 (CSUM_DATA_VALID | CSUM_PSEUDO_HDR); 2028 mbuf->m_pkthdr.csum_data = 0xffff; 2029 break; 2030 case L4TYPE_SCTP: 2031 mbuf->m_pkthdr.csum_flags |= CSUM_SCTP_VALID; 2032 break; 2033 default: 2034 break; 2035 } 2036 } 2037 } 2038 2039 return (mbuf); 2040} 2041 2042/* Enable interrupt */ 2043void 2044nicvf_enable_intr(struct nicvf *nic, int int_type, int q_idx) 2045{ 2046 uint64_t reg_val; 2047 2048 reg_val = nicvf_reg_read(nic, NIC_VF_ENA_W1S); 2049 2050 switch (int_type) { 2051 case NICVF_INTR_CQ: 2052 reg_val |= ((1UL << q_idx) << NICVF_INTR_CQ_SHIFT); 2053 break; 2054 case NICVF_INTR_SQ: 2055 reg_val |= ((1UL << q_idx) << NICVF_INTR_SQ_SHIFT); 2056 break; 2057 case NICVF_INTR_RBDR: 2058 reg_val |= ((1UL << q_idx) << NICVF_INTR_RBDR_SHIFT); 2059 break; 2060 case NICVF_INTR_PKT_DROP: 2061 reg_val |= (1UL << NICVF_INTR_PKT_DROP_SHIFT); 2062 break; 2063 case NICVF_INTR_TCP_TIMER: 2064 reg_val |= (1UL << NICVF_INTR_TCP_TIMER_SHIFT); 2065 break; 2066 case NICVF_INTR_MBOX: 2067 reg_val |= (1UL << NICVF_INTR_MBOX_SHIFT); 2068 break; 2069 case NICVF_INTR_QS_ERR: 2070 reg_val |= (1UL << NICVF_INTR_QS_ERR_SHIFT); 2071 break; 2072 default: 2073 device_printf(nic->dev, 2074 "Failed to enable interrupt: unknown type\n"); 2075 break; 2076 } 2077 2078 nicvf_reg_write(nic, NIC_VF_ENA_W1S, reg_val); 2079} 2080 2081/* Disable interrupt */ 2082void 2083nicvf_disable_intr(struct nicvf *nic, int int_type, int q_idx) 2084{ 2085 uint64_t reg_val = 0; 2086 2087 switch (int_type) { 2088 case NICVF_INTR_CQ: 2089 reg_val |= ((1UL << q_idx) << NICVF_INTR_CQ_SHIFT); 2090 break; 2091 case NICVF_INTR_SQ: 2092 reg_val |= ((1UL << q_idx) << NICVF_INTR_SQ_SHIFT); 2093 break; 2094 case NICVF_INTR_RBDR: 2095 reg_val |= ((1UL << q_idx) << NICVF_INTR_RBDR_SHIFT); 2096 break; 2097 case NICVF_INTR_PKT_DROP: 2098 reg_val |= (1UL << NICVF_INTR_PKT_DROP_SHIFT); 2099 break; 2100 case NICVF_INTR_TCP_TIMER: 2101 reg_val |= (1UL << NICVF_INTR_TCP_TIMER_SHIFT); 2102 break; 2103 case NICVF_INTR_MBOX: 2104 reg_val |= (1UL << NICVF_INTR_MBOX_SHIFT); 2105 break; 2106 case NICVF_INTR_QS_ERR: 2107 reg_val |= (1UL << NICVF_INTR_QS_ERR_SHIFT); 2108 break; 2109 default: 2110 device_printf(nic->dev, 2111 "Failed to disable interrupt: unknown type\n"); 2112 break; 2113 } 2114 2115 nicvf_reg_write(nic, NIC_VF_ENA_W1C, reg_val); 2116} 2117 2118/* Clear interrupt */ 2119void 2120nicvf_clear_intr(struct nicvf *nic, int int_type, int q_idx) 2121{ 2122 uint64_t reg_val = 0; 2123 2124 switch (int_type) { 2125 case NICVF_INTR_CQ: 2126 reg_val = ((1UL << q_idx) << NICVF_INTR_CQ_SHIFT); 2127 break; 2128 case NICVF_INTR_SQ: 2129 reg_val = ((1UL << q_idx) << NICVF_INTR_SQ_SHIFT); 2130 break; 2131 case NICVF_INTR_RBDR: 2132 reg_val = ((1UL << q_idx) << NICVF_INTR_RBDR_SHIFT); 2133 break; 2134 case NICVF_INTR_PKT_DROP: 2135 reg_val = (1UL << NICVF_INTR_PKT_DROP_SHIFT); 2136 break; 2137 case NICVF_INTR_TCP_TIMER: 2138 reg_val = (1UL << NICVF_INTR_TCP_TIMER_SHIFT); 2139 break; 2140 case NICVF_INTR_MBOX: 2141 reg_val = (1UL << NICVF_INTR_MBOX_SHIFT); 2142 break; 2143 case NICVF_INTR_QS_ERR: 2144 reg_val |= (1UL << NICVF_INTR_QS_ERR_SHIFT); 2145 break; 2146 default: 2147 device_printf(nic->dev, 2148 "Failed to clear interrupt: unknown type\n"); 2149 break; 2150 } 2151 2152 nicvf_reg_write(nic, NIC_VF_INT, reg_val); 2153} 2154 2155/* Check if interrupt is enabled */ 2156int 2157nicvf_is_intr_enabled(struct nicvf *nic, int int_type, int q_idx) 2158{ 2159 uint64_t reg_val; 2160 uint64_t mask = 0xff; 2161 2162 reg_val = nicvf_reg_read(nic, NIC_VF_ENA_W1S); 2163 2164 switch (int_type) { 2165 case NICVF_INTR_CQ: 2166 mask = ((1UL << q_idx) << NICVF_INTR_CQ_SHIFT); 2167 break; 2168 case NICVF_INTR_SQ: 2169 mask = ((1UL << q_idx) << NICVF_INTR_SQ_SHIFT); 2170 break; 2171 case NICVF_INTR_RBDR: 2172 mask = ((1UL << q_idx) << NICVF_INTR_RBDR_SHIFT); 2173 break; 2174 case NICVF_INTR_PKT_DROP: 2175 mask = NICVF_INTR_PKT_DROP_MASK; 2176 break; 2177 case NICVF_INTR_TCP_TIMER: 2178 mask = NICVF_INTR_TCP_TIMER_MASK; 2179 break; 2180 case NICVF_INTR_MBOX: 2181 mask = NICVF_INTR_MBOX_MASK; 2182 break; 2183 case NICVF_INTR_QS_ERR: 2184 mask = NICVF_INTR_QS_ERR_MASK; 2185 break; 2186 default: 2187 device_printf(nic->dev, 2188 "Failed to check interrupt enable: unknown type\n"); 2189 break; 2190 } 2191 2192 return (reg_val & mask); 2193} 2194 2195void 2196nicvf_update_rq_stats(struct nicvf *nic, int rq_idx) 2197{ 2198 struct rcv_queue *rq; 2199 2200#define GET_RQ_STATS(reg) \ 2201 nicvf_reg_read(nic, NIC_QSET_RQ_0_7_STAT_0_1 |\ 2202 (rq_idx << NIC_Q_NUM_SHIFT) | (reg << 3)) 2203 2204 rq = &nic->qs->rq[rq_idx]; 2205 rq->stats.bytes = GET_RQ_STATS(RQ_SQ_STATS_OCTS); 2206 rq->stats.pkts = GET_RQ_STATS(RQ_SQ_STATS_PKTS); 2207} 2208 2209void 2210nicvf_update_sq_stats(struct nicvf *nic, int sq_idx) 2211{ 2212 struct snd_queue *sq; 2213 2214#define GET_SQ_STATS(reg) \ 2215 nicvf_reg_read(nic, NIC_QSET_SQ_0_7_STAT_0_1 |\ 2216 (sq_idx << NIC_Q_NUM_SHIFT) | (reg << 3)) 2217 2218 sq = &nic->qs->sq[sq_idx]; 2219 sq->stats.bytes = GET_SQ_STATS(RQ_SQ_STATS_OCTS); 2220 sq->stats.pkts = GET_SQ_STATS(RQ_SQ_STATS_PKTS); 2221} 2222 2223/* Check for errors in the receive cmp.queue entry */ 2224int 2225nicvf_check_cqe_rx_errs(struct nicvf *nic, struct cmp_queue *cq, 2226 struct cqe_rx_t *cqe_rx) 2227{ 2228 struct nicvf_hw_stats *stats = &nic->hw_stats; 2229 struct nicvf_drv_stats *drv_stats = &nic->drv_stats; 2230 2231 if (!cqe_rx->err_level && !cqe_rx->err_opcode) { 2232 drv_stats->rx_frames_ok++; 2233 return (0); 2234 } 2235 2236 switch (cqe_rx->err_opcode) { 2237 case CQ_RX_ERROP_RE_PARTIAL: 2238 stats->rx_bgx_truncated_pkts++; 2239 break; 2240 case CQ_RX_ERROP_RE_JABBER: 2241 stats->rx_jabber_errs++; 2242 break; 2243 case CQ_RX_ERROP_RE_FCS: 2244 stats->rx_fcs_errs++; 2245 break; 2246 case CQ_RX_ERROP_RE_RX_CTL: 2247 stats->rx_bgx_errs++; 2248 break; 2249 case CQ_RX_ERROP_PREL2_ERR: 2250 stats->rx_prel2_errs++; 2251 break; 2252 case CQ_RX_ERROP_L2_MAL: 2253 stats->rx_l2_hdr_malformed++; 2254 break; 2255 case CQ_RX_ERROP_L2_OVERSIZE: 2256 stats->rx_oversize++; 2257 break; 2258 case CQ_RX_ERROP_L2_UNDERSIZE: 2259 stats->rx_undersize++; 2260 break; 2261 case CQ_RX_ERROP_L2_LENMISM: 2262 stats->rx_l2_len_mismatch++; 2263 break; 2264 case CQ_RX_ERROP_L2_PCLP: 2265 stats->rx_l2_pclp++; 2266 break; 2267 case CQ_RX_ERROP_IP_NOT: 2268 stats->rx_ip_ver_errs++; 2269 break; 2270 case CQ_RX_ERROP_IP_CSUM_ERR: 2271 stats->rx_ip_csum_errs++; 2272 break; 2273 case CQ_RX_ERROP_IP_MAL: 2274 stats->rx_ip_hdr_malformed++; 2275 break; 2276 case CQ_RX_ERROP_IP_MALD: 2277 stats->rx_ip_payload_malformed++; 2278 break; 2279 case CQ_RX_ERROP_IP_HOP: 2280 stats->rx_ip_ttl_errs++; 2281 break; 2282 case CQ_RX_ERROP_L3_PCLP: 2283 stats->rx_l3_pclp++; 2284 break; 2285 case CQ_RX_ERROP_L4_MAL: 2286 stats->rx_l4_malformed++; 2287 break; 2288 case CQ_RX_ERROP_L4_CHK: 2289 stats->rx_l4_csum_errs++; 2290 break; 2291 case CQ_RX_ERROP_UDP_LEN: 2292 stats->rx_udp_len_errs++; 2293 break; 2294 case CQ_RX_ERROP_L4_PORT: 2295 stats->rx_l4_port_errs++; 2296 break; 2297 case CQ_RX_ERROP_TCP_FLAG: 2298 stats->rx_tcp_flag_errs++; 2299 break; 2300 case CQ_RX_ERROP_TCP_OFFSET: 2301 stats->rx_tcp_offset_errs++; 2302 break; 2303 case CQ_RX_ERROP_L4_PCLP: 2304 stats->rx_l4_pclp++; 2305 break; 2306 case CQ_RX_ERROP_RBDR_TRUNC: 2307 stats->rx_truncated_pkts++; 2308 break; 2309 } 2310 2311 return (1); 2312} 2313 2314/* Check for errors in the send cmp.queue entry */ 2315int 2316nicvf_check_cqe_tx_errs(struct nicvf *nic, struct cmp_queue *cq, 2317 struct cqe_send_t *cqe_tx) 2318{ 2319 struct cmp_queue_stats *stats = &cq->stats; 2320 2321 switch (cqe_tx->send_status) { 2322 case CQ_TX_ERROP_GOOD: 2323 stats->tx.good++; 2324 return (0); 2325 case CQ_TX_ERROP_DESC_FAULT: 2326 stats->tx.desc_fault++; 2327 break; 2328 case CQ_TX_ERROP_HDR_CONS_ERR: 2329 stats->tx.hdr_cons_err++; 2330 break; 2331 case CQ_TX_ERROP_SUBDC_ERR: 2332 stats->tx.subdesc_err++; 2333 break; 2334 case CQ_TX_ERROP_IMM_SIZE_OFLOW: 2335 stats->tx.imm_size_oflow++; 2336 break; 2337 case CQ_TX_ERROP_DATA_SEQUENCE_ERR: 2338 stats->tx.data_seq_err++; 2339 break; 2340 case CQ_TX_ERROP_MEM_SEQUENCE_ERR: 2341 stats->tx.mem_seq_err++; 2342 break; 2343 case CQ_TX_ERROP_LOCK_VIOL: 2344 stats->tx.lock_viol++; 2345 break; 2346 case CQ_TX_ERROP_DATA_FAULT: 2347 stats->tx.data_fault++; 2348 break; 2349 case CQ_TX_ERROP_TSTMP_CONFLICT: 2350 stats->tx.tstmp_conflict++; 2351 break; 2352 case CQ_TX_ERROP_TSTMP_TIMEOUT: 2353 stats->tx.tstmp_timeout++; 2354 break; 2355 case CQ_TX_ERROP_MEM_FAULT: 2356 stats->tx.mem_fault++; 2357 break; 2358 case CQ_TX_ERROP_CK_OVERLAP: 2359 stats->tx.csum_overlap++; 2360 break; 2361 case CQ_TX_ERROP_CK_OFLOW: 2362 stats->tx.csum_overflow++; 2363 break; 2364 } 2365 2366 return (1); 2367} 2368